Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754471Ab1CRFl4 (ORCPT ); Fri, 18 Mar 2011 01:41:56 -0400 Received: from mail-gy0-f174.google.com ([209.85.160.174]:52292 "EHLO mail-gy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750919Ab1CRFlt (ORCPT ); Fri, 18 Mar 2011 01:41:49 -0400 Message-ID: <02A821E977914EF6B7B4BD36F07C1A2A@subhasishg> From: "Subhasish Ghosh" To: "Greg Kroah-Hartman" , "Alan Cox" Cc: "Alan Cox" , "Arnd Bergmann" , "Thomas Gleixner" , , , , , "Andrew Morton \(commit_signer:1/4=25%\)" , "Randy Dunlap \(commit_signer:1/4=25%\)" , "open list" References: <1299592667-21367-1-git-send-email-subhasish@mistralsolutions.com> <1299592667-21367-8-git-send-email-subhasish@mistralsolutions.com> In-Reply-To: <1299592667-21367-8-git-send-email-subhasish@mistralsolutions.com> Subject: Re: [PATCH v3 7/7] tty: add pruss SUART driver Date: Fri, 18 Mar 2011 11:13:34 +0530 Organization: Mistral Solutions MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 145320 Lines: 4453 Hi Greg/Alan, Any comments regarding this driver. -------------------------------------------------- From: "Subhasish Ghosh" Sent: Tuesday, March 08, 2011 7:27 PM To: Cc: ; ; ; ; "Subhasish Ghosh" ; "Greg Kroah-Hartman (maintainer:TTY LAYER,commit_signer:2/4=50%,commit_signer:1/2=50%)" ; "Andrew Morton (commit_signer:1/4=25%)" ; "Randy Dunlap (commit_signer:1/4=25%)" ; "open list" Subject: [PATCH v3 7/7] tty: add pruss SUART driver > This patch adds support for the TTY compliant > Soft-UART device emulated on PRUSS. > > This patch depends on: > davinci: macro rename DA8XX_LPSC0_DMAX to DA8XX_LPSC0_PRUSS. > https://patchwork.kernel.org/patch/615681/ > davinci: changed SRAM allocator to shared ram. > https://patchwork.kernel.org/patch/549351/ > > Signed-off-by: Subhasish Ghosh > --- > drivers/tty/serial/Kconfig | 22 + > drivers/tty/serial/Makefile | 10 + > drivers/tty/serial/pruss_suart.c | 1058 +++++++++++++++++++ > drivers/tty/serial/pruss_suart.h | 1081 ++++++++++++++++++++ > drivers/tty/serial/pruss_suart_api.c | 1757 > ++++++++++++++++++++++++++++++++ > drivers/tty/serial/pruss_suart_utils.c | 391 +++++++ > include/linux/serial_core.h | 2 + > 7 files changed, 4321 insertions(+), 0 deletions(-) > create mode 100644 drivers/tty/serial/pruss_suart.c > create mode 100644 drivers/tty/serial/pruss_suart.h > create mode 100644 drivers/tty/serial/pruss_suart_api.c > create mode 100644 drivers/tty/serial/pruss_suart_utils.c > > diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig > index 2b83346..14ea0a3 100644 > --- a/drivers/tty/serial/Kconfig > +++ b/drivers/tty/serial/Kconfig > @@ -1596,4 +1596,26 @@ config SERIAL_PCH_UART > This driver is for PCH(Platform controller Hub) UART of Intel EG20T > which is an IOH(Input/Output Hub) for x86 embedded processor. > Enabling PCH_DMA, this PCH UART works as DMA mode. > + > +# > +# SUART Kernel Configuration > +# > + > +config SERIAL_PRUSS_SUART > + depends on ARCH_DAVINCI && ARCH_DAVINCI_DA850 > + select SERIAL_CORE > + tristate "PRUSS based SoftUART emulation on DA8XX" > + ---help--- > + This driver emulates upto eight different UARTs on the PRUSS. > + You may modify the NR_SUARTS macro in the driver to emulate > + less number of UARTS as per your requirement. > + If not sure, mark N > + > +config PRUSS_SUART_MCASP > + int "McASP number" > + depends on ARCH_DAVINCI && ARCH_DAVINCI_DA830 && SERIAL_PRUSS_SUART > + default "0" > + ---help--- > + Enter the McASP number to use with SUART (0, 1 or 2). > + You will need to recompile the kernel if this is changed. > endmenu > diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile > index 8ea92e9..f52a4eb 100644 > --- a/drivers/tty/serial/Makefile > +++ b/drivers/tty/serial/Makefile > @@ -92,3 +92,13 @@ obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o > obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o > obj-$(CONFIG_SERIAL_IFX6X60) += ifx6x60.o > obj-$(CONFIG_SERIAL_PCH_UART) += pch_uart.o > + > +# > +# Makefile for SoftUART emulation > +# > + > +suart_emu-objs := pruss_suart.o \ > + pruss_suart_api.o \ > + pruss_suart_utils.o > + > +obj-$(CONFIG_SERIAL_PRUSS_SUART) += suart_emu.o > diff --git a/drivers/tty/serial/pruss_suart.c > b/drivers/tty/serial/pruss_suart.c > new file mode 100644 > index 0000000..c411ff8 > --- /dev/null > +++ b/drivers/tty/serial/pruss_suart.c > @@ -0,0 +1,1058 @@ > +/* > + * PRUSS SUART Emulation device driver > + * Author: subhasish@mistralsolutions.com > + * > + * This driver supports TI's PRU SUART Emulation and the > + * specs for the same is available at > + * > + * Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/ > + * > + * This program is free software; you can redistribute it and/or > + * modify it under the terms of the GNU General Public License as > + * published by the Free Software Foundation version 2. > + * > + * This program is distributed as is WITHOUT ANY WARRANTY of any > + * kind, whether express or implied; without even the implied warranty > + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include "pruss_suart.h" > + > +#define NR_SUART 8 > +#define DRV_NAME "da8xx_pruss_uart" > +#define DRV_DESC "PRUSS SUART Driver v1.0" > +#define MAX_SUART_RETRIES 100 > +#define SUART_CNTX_SZ 512 > +#define SUART_FIFO_TIMEOUT_DFLT 5 > +#define SUART_FIFO_TIMEOUT_MIN 4 > +#define SUART_FIFO_TIMEOUT_MAX 500 > + > +/* Default timeout set to 5ms */ > +static s16 suart_timeout = SUART_FIFO_TIMEOUT_DFLT; > +module_param(suart_timeout, short, S_IRUGO); > +MODULE_PARM_DESC(suart_timeout, > + "fifo timeout in milli seconds (min: 4; max: 500)"); > + > +struct suart_fifo { > + void *fifo_vaddr_buff_tx; > + void *fifo_vaddr_buff_rx; > + void *fifo_phys_addr_tx; > + void *fifo_phys_addr_rx; > +}; > + > +struct omapl_pru_suart { > + struct uart_port port[NR_SUART]; > + struct device *dev; > + unsigned long tx_empty[NR_SUART]; > + struct clk *clk_mcasp; > + struct suart_fifo suart_fifo_addr[NR_SUART]; > + const struct firmware *fw; > + struct suart_handle suart_hdl[NR_SUART]; > + struct pruss_suart_iomap suart_iomap; > + struct tasklet_struct tx_task[NR_SUART]; > + u32 clk_freq_pru; > + u32 clk_freq_mcasp; > + u32 tx_loadsz; > +}; > + > +static u32 suart_get_duplex(struct omapl_pru_suart *soft_uart, u32 > uart_no) > +{ > + return soft_uart->suart_hdl[uart_no].uart_type; > +} > + > +static inline void __stop_tx(struct omapl_pru_suart *soft_uart, u32 > uart_no) > +{ > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + struct uart_port *port = &soft_uart->port[uart_no]; > + u16 txready; > + u32 i; > + > + /* Check if any TX in progress */ > + for (i = 0, txready = 1; (i < 10000) && txready; i++) { > + txready = (pru_softuart_get_tx_status > + (dev, &soft_uart->suart_hdl[uart_no]) & > + CHN_TXRX_STATUS_RDY); > + } > + /* To stop tx, disable the TX interrupt */ > + spin_lock_irqsave(&port->lock, flags); > + suart_intr_clrmask(dev, soft_uart->suart_hdl[uart_no].uart_num, > + PRU_TX_INTR, CHN_TXRX_IE_MASK_CMPLT); > + pru_softuart_clr_tx_status(dev, &soft_uart->suart_hdl[uart_no]); > + spin_unlock_irqrestore(&port->lock, flags); > +} > + > +static void pruss_suart_stop_tx(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + > + __stop_tx(soft_uart, port->line); > +} > + > +static void omapl_pru_tx_chars(struct omapl_pru_suart *soft_uart, u32 > uart_no) > +{ > + struct circ_buf *xmit = &soft_uart->port[uart_no].state->xmit; > + struct device *dev = soft_uart->dev; > + s32 count = 0; > + > + if (!(suart_get_duplex(soft_uart, uart_no) & ePRU_SUART_HALF_TX)) > + return; > + > + if (uart_circ_empty(xmit) || > + uart_tx_stopped(&soft_uart->port[uart_no])) { > + pruss_suart_stop_tx(&soft_uart->port[uart_no]); > + set_bit(0, &soft_uart->tx_empty[uart_no]); > + return; > + } > + > + for (count = 0; count <= soft_uart->tx_loadsz; count++) { > + *((s8 *)soft_uart->suart_fifo_addr[uart_no].fifo_vaddr_buff_tx > + + count) = xmit->buf[xmit->tail]; > + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); > + soft_uart->port[uart_no].icount.tx++; > + if (uart_circ_empty(xmit)) { > + uart_circ_clear(xmit); > + break; > + } > + } > + > + if (count == (SUART_FIFO_LEN + 1)) > + count = SUART_FIFO_LEN; > + > + /* Write the character to the data port */ > + if (pru_softuart_write(dev, > + &soft_uart->suart_hdl[uart_no], > + (u32 *)&soft_uart->suart_fifo_addr > + [uart_no].fifo_phys_addr_tx, count) != 0) { > + dev_err(dev, "failed to tx data\n"); > + } > + > + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) > + uart_write_wakeup(&soft_uart->port[uart_no]); > + > +#if 0 > + if (uart_circ_empty(xmit)) > + __stop_tx(soft_uart, uart_no); > +#endif > +} > + > +static void suart_tx_task(unsigned long data) > +{ > + struct uart_port *port = (struct uart_port *)data; > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + > + omapl_pru_tx_chars(soft_uart, port->line); > +} > + > +static void omapl_pru_rx_chars(struct omapl_pru_suart *soft_uart, u32 > uart_no) > +{ > + struct tty_struct *tty = NULL; > + struct device *dev = soft_uart->dev; > + s8 flags = TTY_NORMAL; > + u16 rx_status, data_len = SUART_FIFO_LEN; > + u32 data_len_read; > + u8 suart_data[SUART_FIFO_LEN + 1]; > + s32 i = 0; > + > + if (!(suart_get_duplex(soft_uart, uart_no) & ePRU_SUART_HALF_RX)) > + return; > + > + /* read the status */ > + rx_status = pru_softuart_get_rx_status(dev, > + &soft_uart->suart_hdl[uart_no]); > + > + pru_softuart_read_data(dev, &soft_uart->suart_hdl[uart_no], > + suart_data, data_len + 1, &data_len_read); > + > + tty = tty_port_tty_get(&soft_uart->port[uart_no].state->port); > + > + if (!tty) > + return; > + > + /* check for errors */ > + if (rx_status & CHN_TXRX_STATUS_ERR) { > + if (rx_status & CHN_TXRX_STATUS_FE) > + soft_uart->port[uart_no].icount.frame++; > + if (rx_status & CHN_TXRX_STATUS_OVRNERR) > + soft_uart->port[uart_no].icount.overrun++; > + if (rx_status & CHN_TXRX_STATUS_BI) > + soft_uart->port[uart_no].icount.brk++; > + rx_status &= soft_uart->port[uart_no]. > + read_status_mask; > + if (rx_status & CHN_TXRX_STATUS_FE) > + flags = TTY_FRAME; > + if (rx_status & CHN_TXRX_STATUS_OVRNERR) > + flags = TTY_OVERRUN; > + if (rx_status & CHN_TXRX_STATUS_BI) > + flags = TTY_BREAK; > + > +#ifdef SUPPORT_SYSRQ > + soft_uart->port[uart_no].sysrq = 0; > +#endif > + } else { > + for (i = 0; i <= data_len_read; i++) { > + soft_uart->port[uart_no].icount.rx++; > + /* check for sys rq */ > + if (uart_handle_sysrq_char > + (&soft_uart->port[uart_no], suart_data)) > + continue; > + } > + tty_insert_flip_string(tty, suart_data, data_len_read); > + } > + > + /* push data into tty */ > + pru_softuart_clr_rx_status(dev, &soft_uart->suart_hdl[uart_no]); > + tty_flip_buffer_push(tty); > + tty_kref_put(tty); > +} > + > +static irqreturn_t pruss_suart_interrupt(s32 irq, void *dev_id) > +{ > + struct uart_port *port = dev_id; > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + u16 txrx_flag; > + u32 ret; > + unsigned long flags = 0; > + u16 uart_num = port->line + 1; > + > + spin_lock_irqsave(&port->lock, flags); > + > + do { > + ret = pru_softuart_get_isrstatus(dev, uart_num, &txrx_flag); > + if (ret != 0) { > + dev_err(dev, "suart%d: failed to get interrupt, ret:" > + " 0x%X txrx_flag 0x%X\n", > + port->line, ret, txrx_flag); > + spin_unlock_irqrestore(&port->lock, flags); > + return IRQ_NONE; > + } > + if ((PRU_RX_INTR & txrx_flag) == PRU_RX_INTR) { > + pru_intr_clr_isrstatus(dev, uart_num, PRU_RX_INTR); > + if ((soft_uart->port[port->line].ignore_status_mask & > + CHN_TXRX_STATUS_RDY) == CHN_TXRX_STATUS_RDY) { > + pru_softuart_clr_rx_status(dev, > + &soft_uart->suart_hdl > + [port->line]); > + } else { > + omapl_pru_rx_chars(soft_uart, port->line); > + } > + } > + > + if ((PRU_TX_INTR & txrx_flag) == PRU_TX_INTR) { > + pru_intr_clr_isrstatus(dev, uart_num, PRU_TX_INTR); > + pru_softuart_clr_tx_status(dev, &soft_uart->suart_hdl > + [port->line]); > + tasklet_schedule(&soft_uart->tx_task[port->line]); > + } > + } while (txrx_flag & (PRU_RX_INTR | PRU_TX_INTR)); > + > + spin_unlock_irqrestore(&port->lock, flags); > + return IRQ_HANDLED; > +} > + > +static void pruss_suart_stop_rx(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + > + spin_lock_irqsave(&port->lock, flags); > + /* disable rx interrupt */ > + suart_intr_clrmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI > + | CHN_TXRX_IE_MASK_FE | CHN_TXRX_IE_MASK_CMPLT > + | CHN_TXRX_IE_MASK_TIMEOUT); > + spin_unlock_irqrestore(&port->lock, flags); > +} > + > +static void pruss_suart_enable_ms(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + dev_err(dev, "modem control timer not supported\n"); > +} > + > +static void pruss_suart_start_tx(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + > + /* unmask the tx interrupts */ > + spin_lock_irqsave(&port->lock, flags); > + suart_intr_setmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_TX_INTR, CHN_TXRX_IE_MASK_CMPLT); > + spin_unlock_irqrestore(&port->lock, flags); > + > + if (test_and_clear_bit(0, &soft_uart->tx_empty[port->line])) > + omapl_pru_tx_chars(soft_uart, port->line); > +} > + > +static u32 pruss_suart_tx_empty(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + > + return (pru_softuart_get_tx_status(dev, > + &soft_uart->suart_hdl[port->line]) > + & CHN_TXRX_STATUS_RDY) ? 0 : TIOCSER_TEMT; > +} > + > +static u32 pruss_suart_get_mctrl(struct uart_port *port) > +{ > + return -ENOTSUPP; > +} > + > +static void pruss_suart_set_mctrl(struct uart_port *port, u32 mctrl) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + dev_dbg(dev, "modem control not supported\n"); > +} > + > +static void pruss_suart_break_ctl(struct uart_port *port, s32 > break_state) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + > + spin_lock_irqsave(&port->lock, flags); > + > + if (break_state == -1) > + suart_intr_clrmask(dev, > + soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI); > + else > + suart_intr_setmask(dev, > + soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI); > + > + spin_unlock_irqrestore(&port->lock, flags); > +} > + > +static void pruss_suart_set_termios(struct uart_port *port, > + struct ktermios *termios, > + struct ktermios *old) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + u8 cval = 0; > + unsigned long flags = 0; > + u32 baud = 0; > + u32 old_csize = old ? old->c_cflag & CSIZE : CS8; > + > +/* > + * Do not allow unsupported configurations to be set > + */ > + if (1) { > + termios->c_cflag &= ~(CRTSCTS | CMSPAR | CSTOPB > + | PARENB | PARODD | CMSPAR); > + } > + > + switch (termios->c_cflag & CSIZE) { > + case CS6: > + cval = ePRU_SUART_DATA_BITS6; > + break; > + case CS7: > + cval = ePRU_SUART_DATA_BITS7; > + break; > + default: > + case CS8: > + cval = ePRU_SUART_DATA_BITS8; > + break; > + } > + /* > + * We do not support CS5. > + */ > + if ((termios->c_cflag & CSIZE) == CS5) { > + termios->c_cflag &= ~CSIZE; > + termios->c_cflag |= old_csize; > + } > + if (pru_softuart_setdatabits > + (dev, &soft_uart->suart_hdl[port->line], cval, cval) != 0) > + dev_err(dev, "failed to set data bits to: %d\n", cval); > + > +/* > + * Ask the core to calculate the divisor for us. > + */ > + baud = uart_get_baud_rate(port, termios, old, > + port->uartclk / 16 / 0xffff, > + port->uartclk / 16); > + > +/* > + * Ok, we're now changing the port state. Do it with > + * interrupts disabled. > + */ > + spin_lock_irqsave(&port->lock, flags); > + > + /* Set the baud */ > + if (pru_softuart_setbaud(dev, &soft_uart->suart_hdl[port->line], > + SUART_DEFAULT_BAUD / baud, > + SUART_DEFAULT_BAUD / baud) != 0) > + dev_err(dev, "failed to set baud to: %d\n", baud); > + > +/* > + * update port->read_config_mask and port->ignore_config_mask > + * to indicate the events we are interested in receiving > + */ > + suart_intr_setmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, SUART_GBL_INTR_ERR_MASK); > + port->read_status_mask = 0; > + if (termios->c_iflag & INPCK) { /* Input parity check not supported, > + just enabled FE */ > + port->read_status_mask |= CHN_TXRX_STATUS_FE; > + suart_intr_setmask(dev, > + soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_FE); > + } > + if (termios->c_iflag & (BRKINT | PARMRK)) { > + port->read_status_mask |= CHN_TXRX_STATUS_BI; > + suart_intr_setmask(dev, > + soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI); > + } > +/* > + * Characters to ignore > + */ > + port->ignore_status_mask = 0; > + if (termios->c_iflag & IGNBRK) { > + port->ignore_status_mask |= CHN_TXRX_STATUS_BI; > + /* > + * If we're ignoring break indicators, > + * ignore overruns too (for real raw support). > + */ > + if (termios->c_iflag & IGNPAR) { > + port->ignore_status_mask |= > + (CHN_TXRX_STATUS_OVRNERR | CHN_TXRX_STATUS_FE); > + /* > + * Overrun in case of RX > + * Underrun in case of TX > + */ > + suart_intr_clrmask(dev, soft_uart-> > + suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_FE); > + } > + suart_intr_clrmask(dev, > + soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI); > + } > +/* > + * ignore all characters if CREAD is not set > + */ > + if ((termios->c_cflag & CREAD) == 0) { > + port->ignore_status_mask |= CHN_TXRX_STATUS_RDY; > + pruss_suart_stop_rx(port); > + } > + /* > + * update the per port timeout > + */ > + uart_update_timeout(port, termios->c_cflag, baud); > + > + spin_unlock_irqrestore(&port->lock, flags); > + > + /* Don't rewrite B0 */ > + if (tty_termios_baud_rate(termios)) > + tty_termios_encode_baud_rate(termios, baud, baud); > +} > + > +/* > + * Grab any interrupt resources and initialise any low level driver > + * state. Enable the port for reception. It should not activate > + * RTS nor DTR; this will be done via a separate call to set_mctrl. > + * > + * This method will only be called when the port is initially opened. > + * > + * Locking: port_sem taken. > + * Interrupts: globally disabled. > + */ > +static s32 pruss_suart_startup(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + s32 retval; > + > + /* > + * Disable interrupts from this port > + */ > + spin_lock_irqsave(&port->lock, flags); > + suart_intr_clrmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_TX_INTR, CHN_TXRX_IE_MASK_CMPLT); > + suart_intr_clrmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI > + | CHN_TXRX_IE_MASK_FE | CHN_TXRX_IE_MASK_CMPLT > + | CHN_TXRX_IE_MASK_TIMEOUT); > + spin_unlock_irqrestore(&port->lock, flags); > + > + retval = request_irq(port->irq, pruss_suart_interrupt, > + port->irqflags, "suart_irq", port); > + if (retval) { > + free_irq(port->irq, port); /* should we free this if err */ > + goto out; > + } > + /* > + * enable interrupts from this port > + */ > + spin_lock_irqsave(&port->lock, flags); > + suart_intr_setmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, SUART_GBL_INTR_ERR_MASK); > + > + suart_intr_setmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI > + | CHN_TXRX_IE_MASK_FE | CHN_TXRX_IE_MASK_CMPLT > + | CHN_TXRX_IE_MASK_TIMEOUT); > + > + suart_intr_setmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_TX_INTR, CHN_TXRX_IE_MASK_CMPLT); > + spin_unlock_irqrestore(&port->lock, flags); > + > + if ((suart_get_duplex(soft_uart, port->line) & ePRU_SUART_HALF_TX) > + == ePRU_SUART_HALF_TX) { > + suart_pru_to_host_intr_enable(dev, soft_uart-> > + suart_hdl[port->line].uart_num, PRU_TX_INTR, true); > + } > + /* Seed RX if port is half-rx or full-duplex */ > + if ((suart_get_duplex(soft_uart, port->line) & ePRU_SUART_HALF_RX) > + == ePRU_SUART_HALF_RX) { > + suart_pru_to_host_intr_enable(dev, soft_uart-> > + suart_hdl[port->line].uart_num, PRU_RX_INTR, true); > + pru_softuart_read(dev, &soft_uart->suart_hdl[port->line], > + (u32 *)&soft_uart->suart_fifo_addr[port->line]. > + fifo_phys_addr_rx, SUART_FIFO_LEN); > + } > +out: > + return retval; > +} > + > +/* > + * Disable the port, disable any break condition that may be in > + * effect, and free any interrupt resources. It should not disable > + * RTS nor DTR; this will have already been done via a separate > + * call to set_mctrl. > + * > + * Drivers must not access port->info once this call has completed. > + * > + * This method will only be called when there are no more users of > + * this port. > + * > + * Locking: port_sem taken. > + * Interrupts: caller dependent. > + */ > + > +static void pruss_suart_shutdown(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct device *dev = soft_uart->dev; > + unsigned long flags = 0; > + > + /* > + * Disable interrupts from this port > + */ > + /* Disable BI and FE intr */ > + spin_lock_irqsave(&port->lock, flags); > + suart_intr_clrmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_TX_INTR, CHN_TXRX_IE_MASK_CMPLT); > + suart_intr_clrmask(dev, soft_uart->suart_hdl[port->line].uart_num, > + PRU_RX_INTR, CHN_TXRX_IE_MASK_BI > + | CHN_TXRX_IE_MASK_FE | CHN_TXRX_IE_MASK_CMPLT > + | CHN_TXRX_IE_MASK_TIMEOUT); > + spin_unlock_irqrestore(&port->lock, flags); > + > + /* free interrupts */ > + free_irq(port->irq, port); > +} > + > +/* > + * Return a pointer to a string constant describing the specified > + * port, or return NULL, in which case the string 'unknown' is > + * substituted. > + * > + * Locking: none. > + * Interrupts: caller dependent. > + */ > + > +static const char *pruss_suart_type(struct uart_port *port) > +{ > + return "suart_tty"; > +} > + > +/* > + * Release any memory and IO region resources currently in use by > + * the port. > + * > + * Locking: none. > + * Interrupts: caller dependent. > + */ > + > +static void pruss_suart_release_port(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct platform_device *pdev = to_platform_device(port->dev); > + > + if (0 != pru_softuart_close(&soft_uart->suart_hdl[port->line])) > + dev_err(&pdev->dev, "failed to close suart\n"); > + > + return; > +} > + > +/* > + * Request any memory and IO region resources required by the port. > + * If any fail, no resources should be registered when this function > + * returns, and it should return -EBUSY on failure. > + * > + * Locking: none. > + * Interrupts: caller dependent. > + * > + * We need to d/l the f/w in probe and since this api > + * is called per uart, the request_mem_region should > + * be called in probe itself. > + */ > +static s32 pruss_suart_request_port(struct uart_port *port) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + struct platform_device *pdev = to_platform_device(port->dev); > + struct device *dev = soft_uart->dev; > + struct suart_config pru_suart_config; > + s16 timeout = 0; > + u32 err = 0; > + > + if (soft_uart == NULL) { > + dev_err(&pdev->dev, "soft_uart ptr failed\n"); > + return -ENODEV; > + } > + err = pru_softuart_open(&soft_uart->suart_hdl[port->line]); > + if (err != 0) { > + dev_err(&pdev->dev, "failed to open suart: %d\n", err); > + err = -ENODEV; > + goto exit; > + } > + set_bit(0, &soft_uart->tx_empty[port->line]); > + > + /* set fifo /timeout */ > + if (SUART_FIFO_TIMEOUT_MIN > suart_timeout) { > + dev_err(&pdev->dev, "fifo timeout less than %d ms not supported\n", > + SUART_FIFO_TIMEOUT_MIN); > + suart_timeout = SUART_FIFO_TIMEOUT_MIN; > + } else if (SUART_FIFO_TIMEOUT_MAX < suart_timeout) { > + dev_err(&pdev->dev, "fifo timeout more than %d ms not supported\n", > + SUART_FIFO_TIMEOUT_MAX); > + suart_timeout = SUART_FIFO_TIMEOUT_MAX; > + } > + > + /* This is only for x8 */ > + timeout = (SUART_DEFAULT_BAUD * suart_timeout) / 1000; > + pru_set_fifo_timeout(dev, timeout); > + > + if (soft_uart->suart_hdl[port->line].uart_num == PRU_SUART_UART1) { > + pru_suart_config.tx_serializer = PRU_SUART0_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART0_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART2) { > + pru_suart_config.tx_serializer = PRU_SUART1_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART1_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART3) { > + pru_suart_config.tx_serializer = PRU_SUART2_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART2_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART4) { > + pru_suart_config.tx_serializer = PRU_SUART3_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART3_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART5) { > + pru_suart_config.tx_serializer = PRU_SUART4_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART4_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART6) { > + pru_suart_config.tx_serializer = PRU_SUART5_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART5_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART7) { > + pru_suart_config.tx_serializer = PRU_SUART6_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART6_CONFIG_RX_SER; > + } else if (soft_uart->suart_hdl[port->line].uart_num == > + PRU_SUART_UART8) { > + pru_suart_config.tx_serializer = PRU_SUART7_CONFIG_TX_SER; > + pru_suart_config.rx_serializer = PRU_SUART7_CONFIG_RX_SER; > + } else { > + return -ENOTSUPP; > + } > + > + /* Some defaults to startup. reconfigured by terimos later */ > + pru_suart_config.tx_clk_divisor = 1; > + pru_suart_config.rx_clk_divisor = 1; > + pru_suart_config.tx_bits_per_char = ePRU_SUART_DATA_BITS8; > + pru_suart_config.rx_bits_per_char = ePRU_SUART_DATA_BITS8; > + pru_suart_config.oversampling = SUART_DEFAULT_OVRSMPL; > + > + if (pru_softuart_setconfig(dev, &soft_uart->suart_hdl[port->line], > + &pru_suart_config) != 0) { > + dev_err(&pdev->dev, > + "pru_softuart_setconfig: failed to set config: %X\n", > + err); > + } > +exit: > + return err; > +} > + > +/* > + * Perform any autoconfiguration steps required for the port. `flag` > + * contains a bit mask of the required configuration. UART_CONFIG_TYPE > + * indicates that the port requires detection and identification. > + * port->type should be set to the type found, or PORT_UNKNOWN if > + * no port was detected. > + * > + * UART_CONFIG_IRQ indicates autoconfiguration of the interrupt signal, > + * which should be probed using standard kernel autoprobing techniques. > + * This is not necessary on platforms where ports have interrupts > + * internally hard wired (eg, system on a chip implementations). > + * > + * Locking: none. > + * Interrupts: caller dependent. > + */ > + > +static void pruss_suart_config_port(struct uart_port *port, s32 flags) > +{ > + if (flags & UART_CONFIG_TYPE && pruss_suart_request_port(port) == 0) > + port->type = PORT_DA8XX_PRU_SUART; > +} > + > +/* > + * Verify the new serial port information contained within serinfo is > + * suitable for this port type. > + * > + * Locking: none. > + * Interrupts: caller dependent. > + */ > +static s32 pruss_suart_verify_port(struct uart_port *port, > + struct serial_struct *ser) > +{ > + struct omapl_pru_suart *soft_uart = > + container_of(port, struct omapl_pru_suart, port[port->line]); > + s32 ret = 0; > + > + if (ser->type != PORT_UNKNOWN && ser->type != PORT_DA8XX_PRU_SUART) > + ret = -EINVAL; > + if (soft_uart->port[port->line].irq != ser->irq) > + ret = -EINVAL; > + if (ser->io_type != UPIO_MEM) > + ret = -EINVAL; > + if (soft_uart->port[port->line].uartclk / 16 != ser->baud_base) > + ret = -EINVAL; > + if ((void *)soft_uart->port[port->line].mapbase != ser->iomem_base) > + ret = -EINVAL; > + if (soft_uart->port[port->line].iobase != ser->port) > + ret = -EINVAL; > + return ret; > +} > + > +static struct uart_ops pruss_suart_ops = { > + .tx_empty = pruss_suart_tx_empty, > + .set_mctrl = pruss_suart_set_mctrl, > + .get_mctrl = pruss_suart_get_mctrl, > + .stop_tx = pruss_suart_stop_tx, > + .start_tx = pruss_suart_start_tx, > + .stop_rx = pruss_suart_stop_rx, > + .enable_ms = pruss_suart_enable_ms, > + .break_ctl = pruss_suart_break_ctl, > + .startup = pruss_suart_startup, > + .shutdown = pruss_suart_shutdown, > + .set_termios = pruss_suart_set_termios, > + .type = pruss_suart_type, > + .release_port = pruss_suart_release_port, > + .request_port = pruss_suart_request_port, > + .config_port = pruss_suart_config_port, > + .verify_port = pruss_suart_verify_port, > +}; > + > +static struct uart_driver pruss_suart_reg = { > + .owner = THIS_MODULE, > + .driver_name = DRV_NAME, > + .dev_name = "ttySU", > + .major = 0, > + .minor = 16, > + .nr = NR_SUART, > +}; > + > +static s32 __devinit pruss_suart_probe(struct platform_device *pdev) > +{ > + struct omapl_pru_suart *soft_uart; > + const struct da850_evm_pruss_suart_data *pdata; > + struct device *dev = &pdev->dev; > + struct resource *res; > + s32 err, i; > + u8 *fw_data = NULL; > + > + pdata = dev->platform_data; > + if (!pdata) { > + dev_err(&pdev->dev, "platform data not found\n"); > + return -EINVAL; > + } > + > + soft_uart = kzalloc(sizeof(struct omapl_pru_suart), GFP_KERNEL); > + if (!soft_uart) > + return -ENOMEM; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(&pdev->dev, "failed to get resource"); > + return -ENOMEM; > + } > + > + if (!request_mem_region(res->start, > + resource_size(res), > + dev_name(&pdev->dev))) { > + dev_err(&pdev->dev, "mcasp memory region already claimed!\n"); > + err = -EBUSY; > + goto probe_exit; > + } > + > + soft_uart->suart_iomap.mcasp_io_addr = ioremap(res->start, > + resource_size(res)); > + if (!soft_uart->suart_iomap.mcasp_io_addr) { > + dev_err(&pdev->dev, "mcasp ioremap failed\n"); > + err = -EFAULT; > + goto probe_exit_1; > + } > + > + soft_uart->suart_iomap.p_fifo_buff_virt_base = > + sram_alloc(SUART_CNTX_SZ * NR_SUART * 2, > + (dma_addr_t *) &soft_uart->suart_iomap.p_fifo_buff_phys_base); > + if (!soft_uart->suart_iomap.p_fifo_buff_virt_base) > + goto probe_exit_iounmap; > + > + soft_uart->clk_freq_pru = pruss_get_clk_freq(dev); > + > + soft_uart->clk_mcasp = clk_get(&pdev->dev, NULL); > + if (IS_ERR(soft_uart->clk_mcasp)) { > + dev_err(&pdev->dev, "no clock available: mcasp\n"); > + err = -ENODEV; > + soft_uart->clk_mcasp = NULL; > + goto probe_exit_sram_free; > + } > + > + soft_uart->clk_freq_mcasp = clk_get_rate(soft_uart->clk_mcasp); > + clk_enable(soft_uart->clk_mcasp); > + > + err = request_firmware(&soft_uart->fw, "PRU_SUART_Emulation.bin", > + &pdev->dev); > + if (err) { > + dev_err(&pdev->dev, "can't load firmware\n"); > + err = -ENODEV; > + goto probe_exit_clk; > + } > + dev_info(&pdev->dev, "fw size %td. downloading...\n", > + soft_uart->fw->size); > + > + /* download firmware into pru & init */ > + fw_data = kmalloc(soft_uart->fw->size, GFP_KERNEL); > + memcpy((void *)fw_data, (const void *)soft_uart->fw->data, > + soft_uart->fw->size); > + > + soft_uart->suart_iomap.pru_clk_freq = > + (soft_uart->clk_freq_pru / 1000000); > + > + err = pru_softuart_init(dev, SUART_DEFAULT_BAUD, SUART_DEFAULT_BAUD, > + SUART_DEFAULT_OVRSMPL, fw_data, > + soft_uart->fw->size, &soft_uart->suart_iomap); > + if (err) { > + dev_err(&pdev->dev, "pruss init error\n"); > + err = -ENODEV; > + kfree((const void *)fw_data); > + goto probe_release_fw; > + } > + kfree((const void *)fw_data); > + > + platform_set_drvdata(pdev, &soft_uart->port[0]); > + soft_uart->dev = dev; > + > + for (i = 0; i < NR_SUART; i++) { > + soft_uart->port[i].ops = &pruss_suart_ops; > + soft_uart->port[i].iotype = UPIO_MEM; > + soft_uart->port[i].flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP; > + soft_uart->port[i].mapbase = > + (u32)soft_uart->suart_iomap.p_fifo_buff_virt_base; > + soft_uart->port[i].membase = > + (u8 *)&soft_uart->suart_iomap; > + soft_uart->port[i].type = PORT_DA8XX_PRU_SUART; > + soft_uart->port[i].irq = > + platform_get_irq(to_platform_device(dev->parent), i); > + soft_uart->port[i].dev = &pdev->dev; > + soft_uart->port[i].irqflags = IRQF_SHARED; > + soft_uart->port[i].uartclk = soft_uart->clk_freq_mcasp; > + soft_uart->port[i].fifosize = SUART_FIFO_LEN; > + soft_uart->tx_loadsz = SUART_FIFO_LEN; > + soft_uart->port[i].custom_divisor = 1; > + soft_uart->port[i].line = i; > + soft_uart->suart_hdl[i].uart_num = i + 1; > + soft_uart->port[i].serial_in = NULL; > + > + soft_uart->suart_fifo_addr[i].fifo_vaddr_buff_tx = > + soft_uart->suart_iomap.p_fifo_buff_virt_base + > + (2 * SUART_CNTX_SZ * i); > + > + soft_uart->suart_fifo_addr[i].fifo_vaddr_buff_rx = > + soft_uart->suart_iomap.p_fifo_buff_virt_base + > + ((2 * SUART_CNTX_SZ * i) + SUART_CNTX_SZ); > + > + soft_uart->suart_fifo_addr[i].fifo_phys_addr_tx = > + soft_uart->suart_iomap.p_fifo_buff_phys_base + > + (2 * SUART_CNTX_SZ * i); > + > + soft_uart->suart_fifo_addr[i].fifo_phys_addr_rx = > + soft_uart->suart_iomap.p_fifo_buff_phys_base + > + ((2 * SUART_CNTX_SZ * i) + SUART_CNTX_SZ); > + > + soft_uart->port[i].serial_out = NULL; > + tasklet_init(&soft_uart->tx_task[i], suart_tx_task, > + (unsigned long)&soft_uart->port[i]); > + uart_add_one_port(&pruss_suart_reg, &soft_uart->port[i]); > + } > + > + dev_info(&pdev->dev, > + "%s device registered (pru_clk=%d, asp_clk=%d)\n", > + DRV_NAME, soft_uart->clk_freq_pru, soft_uart->clk_freq_mcasp); > + > + return 0; > + > +probe_release_fw: > + release_firmware(soft_uart->fw); > +probe_exit_clk: > + clk_put(soft_uart->clk_mcasp); > + clk_disable(soft_uart->clk_mcasp); > +probe_exit_sram_free: > + sram_free(soft_uart->suart_iomap.p_fifo_buff_virt_base, > + SUART_CNTX_SZ * NR_SUART * 2); > +probe_exit_iounmap: > + iounmap(soft_uart->suart_iomap.mcasp_io_addr); > +probe_exit_1: > + release_mem_region(res->start, > + resource_size(res)); > +probe_exit: > + kfree(soft_uart); > + return err; > +} > + > +static s32 __devexit pruss_suart_remove(struct platform_device *pdev) > +{ > + struct omapl_pru_suart *soft_uart = platform_get_drvdata(pdev); > + const struct da850_evm_pruss_suart_data *pdata; > + struct device *dev = &pdev->dev; > + struct resource *res; > + int i; > + > + pdata = dev->platform_data; > + if (!pdata) > + dev_err(&pdev->dev, "platform data not found\n"); > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!res) { > + dev_err(&pdev->dev, "failed to get resource"); > + return -ENOMEM; > + } > + > + platform_set_drvdata(pdev, NULL); > + > + if (soft_uart) { > + for (i = 0; i < NR_SUART; i++) { > + uart_remove_one_port(&pruss_suart_reg, > + &soft_uart->port[i]); > + } > + } > + > + sram_free(soft_uart->suart_iomap.p_fifo_buff_virt_base, > + SUART_CNTX_SZ * NR_SUART * 2); > + release_firmware(soft_uart->fw); > + clk_put(soft_uart->clk_mcasp); > + pru_mcasp_deinit(); > + clk_disable(soft_uart->clk_mcasp); > + iounmap(soft_uart->suart_iomap.mcasp_io_addr); > + if (pdata) { > + release_mem_region(res->start, > + resource_size(res)); > + } > + kfree(soft_uart); > + return 0; > +} > + > +#define pruss_suart_suspend NULL > +#define pruss_suart_resume NULL > + > +static struct platform_driver serial_pruss_driver = { > + .probe = pruss_suart_probe, > + .remove = __devexit_p(pruss_suart_remove), > + .suspend = pruss_suart_suspend, > + .resume = pruss_suart_resume, > + .driver = { > + .name = DRV_NAME, > + .owner = THIS_MODULE, > + }, > +}; > + > +static s32 __init pruss_suart_init(void) > +{ > + s32 ret; > + > + pruss_suart_reg.nr = NR_SUART; > + ret = uart_register_driver(&pruss_suart_reg); > + if (ret) > + return ret; > + ret = platform_driver_register(&serial_pruss_driver); > + if (ret) > + goto out; > + > + pr_debug("SUART serial driver loaded\n"); > + return ret; > +out: > + uart_unregister_driver(&pruss_suart_reg); > + return ret; > +} > + > +module_init(pruss_suart_init); > + > +static void __exit pruss_suart_exit(void) > +{ > + platform_driver_unregister(&serial_pruss_driver); > + uart_unregister_driver(&pruss_suart_reg); > + pr_debug("SUART serial driver unloaded\n"); > +} > + > +module_exit(pruss_suart_exit); > + > +/* Module information */ > +MODULE_AUTHOR("Subhasish Ghosh "); > +MODULE_LICENSE("GPL"); > +MODULE_DESCRIPTION(DRV_DESC); > diff --git a/drivers/tty/serial/pruss_suart.h > b/drivers/tty/serial/pruss_suart.h > new file mode 100644 > index 0000000..8e0b40d > --- /dev/null > +++ b/drivers/tty/serial/pruss_suart.h > @@ -0,0 +1,1081 @@ > +/* > + * Copyright (C) 2010 Texas Instruments Incorporated > + * Author: Jitendra Kumar > + * > + * This program is free software; you can redistribute it and/or modify > it > + * under the terms of the GNU General Public License as published by the > + * Free Software Foundation version 2. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, > + * whether express or implied; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + */ > + > +#ifndef _SUART_API_H_ > +#define _SUART_API_H_ > + > +#include > +#include > +#include > +#include > + > +#define SINGLE_PRU 0 > +#define BOTH_PRU 1 > +#define PRU_ACTIVE BOTH_PRU > +#define PRU_CLK_228 228 > +#define PRU_CLK_186 186 > + > +#define PRU_SUART_SERIALIZER_0 (0u) > +#define PRU_SUART_SERIALIZER_1 (1u) > +#define PRU_SUART_SERIALIZER_2 (2u) > +#define PRU_SUART_SERIALIZER_3 (3u) > +#define PRU_SUART_SERIALIZER_4 (4u) > +#define PRU_SUART_SERIALIZER_5 (5u) > +#define PRU_SUART_SERIALIZER_6 (6u) > +#define PRU_SUART_SERIALIZER_7 (7u) > +#define PRU_SUART_SERIALIZER_8 (8u) > +#define PRU_SUART_SERIALIZER_9 (9u) > +#define PRU_SUART_SERIALIZER_10 (10u) > +#define PRU_SUART_SERIALIZER_11 (11u) > +#define PRU_SUART_SERIALIZER_12 (12u) > +#define PRU_SUART_SERIALIZER_13 (13u) > +#define PRU_SUART_SERIALIZER_14 (14u) > +#define PRU_SUART_SERIALIZER_15 (15u) > +#define PRU_SUART_SERIALIZER_NONE (16u) > + > +#define PRU_SUART_UART1 (1u) > +#define PRU_SUART_UART2 (2u) > +#define PRU_SUART_UART3 (3u) > +#define PRU_SUART_UART4 (4u) > +#define PRU_SUART_UART5 (5u) > +#define PRU_SUART_UART6 (6u) > +#define PRU_SUART_UART7 (7u) > +#define PRU_SUART_UART8 (8u) > +#define PRU_SUART_UARTx_INVALID (9u) > + > +#define PRU_SUART_HALF_TX (1u) > +#define PRU_SUART_HALF_RX (2u) > +#define PRU_SUART_HALF_TX_DISABLED (4u) > +#define PRU_SUART_HALF_RX_DISABLED (8u) > + > +#define PRU_SUART0_CONFIG_DUPLEX (PRU_SUART_HALF_TX_DISABLED | \ > + PRU_SUART_HALF_RX_DISABLED) > +#define PRU_SUART0_CONFIG_RX_SER (PRU_SUART_SERIALIZER_NONE) > +#define PRU_SUART0_CONFIG_TX_SER (PRU_SUART_SERIALIZER_NONE) > + > +#define PRU_SUART1_CONFIG_DUPLEX (PRU_SUART_HALF_TX | \ > + PRU_SUART_HALF_RX) > +#define PRU_SUART1_CONFIG_RX_SER (PRU_SUART_SERIALIZER_7) > +#define PRU_SUART1_CONFIG_TX_SER (PRU_SUART_SERIALIZER_8) > + > +#define PRU_SUART2_CONFIG_DUPLEX (PRU_SUART_HALF_TX | \ > + PRU_SUART_HALF_RX) > +#define PRU_SUART2_CONFIG_RX_SER (PRU_SUART_SERIALIZER_9) > +#define PRU_SUART2_CONFIG_TX_SER (PRU_SUART_SERIALIZER_10) > + > +#define PRU_SUART3_CONFIG_DUPLEX (PRU_SUART_HALF_TX | \ > + PRU_SUART_HALF_RX) > +#define PRU_SUART3_CONFIG_RX_SER (PRU_SUART_SERIALIZER_13) > +#define PRU_SUART3_CONFIG_TX_SER (PRU_SUART_SERIALIZER_14) > + > +#define PRU_SUART4_CONFIG_DUPLEX (PRU_SUART_HALF_TX_DISABLED | \ > + PRU_SUART_HALF_RX_DISABLED) > +#define PRU_SUART4_CONFIG_RX_SER (PRU_SUART_SERIALIZER_NONE) > +#define PRU_SUART4_CONFIG_TX_SER (PRU_SUART_SERIALIZER_NONE) > + > +#define PRU_SUART5_CONFIG_DUPLEX (PRU_SUART_HALF_TX_DISABLED | \ > + PRU_SUART_HALF_RX_DISABLED) > +#define PRU_SUART5_CONFIG_RX_SER (PRU_SUART_SERIALIZER_NONE) > +#define PRU_SUART5_CONFIG_TX_SER (PRU_SUART_SERIALIZER_NONE) > + > +#define PRU_SUART6_CONFIG_DUPLEX (PRU_SUART_HALF_TX_DISABLED | \ > + PRU_SUART_HALF_RX_DISABLED) > +#define PRU_SUART6_CONFIG_RX_SER (PRU_SUART_SERIALIZER_NONE) > +#define PRU_SUART6_CONFIG_TX_SER (PRU_SUART_SERIALIZER_NONE) > + > +#define PRU_SUART7_CONFIG_DUPLEX (PRU_SUART_HALF_TX_DISABLED | \ > + PRU_SUART_HALF_RX_DISABLED) > +#define PRU_SUART7_CONFIG_RX_SER (PRU_SUART_SERIALIZER_NONE) > +#define PRU_SUART7_CONFIG_TX_SER (PRU_SUART_SERIALIZER_NONE) > + > +#define SUART_NUM_OF_CHANNELS_PER_SUART 2 > +#define SUART_NUM_OF_BYTES_PER_CHANNEL 16 > + > +#define PRU_TX_INTR 1 > +#define PRU_RX_INTR 2 > + > +#define CHN_TXRX_STATUS_TIMEOUT BIT(6) > +#define CHN_TXRX_STATUS_BI BIT(5) > +#define CHN_TXRX_STATUS_FE BIT(4) > +#define CHN_TXRX_STATUS_UNERR BIT(3) > +#define CHN_TXRX_STATUS_OVRNERR BIT(3) > +#define CHN_TXRX_STATUS_ERR BIT(2) > +#define CHN_TXRX_STATUS_CMPLT BIT(1) > +#define CHN_TXRX_STATUS_RDY BIT(0) > + > +#define CHN_TXRX_IE_MASK_TIMEOUT BIT(14) > +#define CHN_TXRX_IE_MASK_BI BIT(13) > +#define CHN_TXRX_IE_MASK_FE BIT(12) > +#define CHN_TXRX_IE_MASK_CMPLT BIT(1) > + > +#define SUART_GBL_INTR_ERR_MASK BIT(9) > +#define SUART_PRU_ID_MASK 0xFF > + > +#define SUART_FIFO_LEN 15 > +#define SUART_8X_OVRSMPL 1 > +#define SUART_16X_OVRSMPL 2 > +#define SUART_DEFAULT_OVRSMPL SUART_8X_OVRSMPL > + > +#define SUART_DEFAULT_OVRSMPL_OFFSET 26 > +#define SUART_CHN_OFFSET 31 > +#define SERIALIZER_OFFSET 8 > + > +#if (SUART_DEFAULT_OVRSMPL == SUART_16X_OVRSMPL) > +#define SUART_DEFAULT_BAUD 57600 > +#else > +#define SUART_DEFAULT_BAUD 115200 > +#endif > + > +#define PRU_MODE_INVALID 0x0 > +#define PRU_MODE_TX_ONLY 0x1 > +#define PRU_MODE_RX_ONLY 0x2 > +#define PRU_MODE_RX_TX_BOTH 0x3 > + > +#if (PRU_ACTIVE == BOTH_PRU) > +#define PRU0_MODE PRU_MODE_RX_ONLY > +#define PRU1_MODE PRU_MODE_TX_ONLY > +#elif (PRU_ACTIVE == SINGLE_PRU) > +#define PRU0_MODE PRU_MODE_RX_TX_BOTH > +#define PRU1_MODE PRU_MODE_INVALID > +#else > +#define PRU0_MODE PRU_MODE_INVALID > +#define PRU1_MODE PRU_MODE_INVALID > +#endif > + > +#define MCASP_XBUF_BASE_ADDR (0x01d00200) > +#define MCASP_RBUF_BASE_ADDR (0x01d00280) > +#define MCASP_SRCTL_BASE_ADDR (0x01d00180) > + > +#define MCASP_SRCTL_TX_MODE (0x000D) > +#define MCASP_SRCTL_RX_MODE (0x000E) > + > +/* Since only PRU0 can work as RX */ > +#define RX_DEFAULT_DATA_DUMP_ADDR (0x00001FC) > +#define PRU_NUM_OF_CHANNELS (16) > + > +/* MCASP */ > + > +#define OMAPL_MCASP_PFUNC_AFSR_MASK (0x80000000u) > +#define OMAPL_MCASP_PFUNC_AFSR_SHIFT (0x0000001Fu) > +#define OMAPL_MCASP_PFUNC_AFSR_RESETVAL (0x00000000u) > +/* AFSR Tokens */ > +#define OMAPL_MCASP_PFUNC_AFSR_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AFSR_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AHCLKR_MASK (0x40000000u) > +#define OMAPL_MCASP_PFUNC_AHCLKR_SHIFT (0x0000001Eu) > +#define OMAPL_MCASP_PFUNC_AHCLKR_RESETVAL (0x00000000u) > +/* AHCLKR Tokens */ > +#define OMAPL_MCASP_PFUNC_AHCLKR_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AHCLKR_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_ACLKR_MASK (0x20000000u) > +#define OMAPL_MCASP_PFUNC_ACLKR_SHIFT (0x0000001Du) > +#define OMAPL_MCASP_PFUNC_ACLKR_RESETVAL (0x00000000u) > +/* ACLKR Tokens */ > +#define OMAPL_MCASP_PFUNC_ACLKR_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_ACLKR_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AFSX_MASK (0x10000000u) > +#define OMAPL_MCASP_PFUNC_AFSX_SHIFT (0x0000001Cu) > +#define OMAPL_MCASP_PFUNC_AFSX_RESETVAL (0x00000000u) > +/* AFSX Tokens */ > +#define OMAPL_MCASP_PFUNC_AFSX_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AFSX_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AHCLKX_MASK (0x08000000u) > +#define OMAPL_MCASP_PFUNC_AHCLKX_SHIFT (0x0000001Bu) > +#define OMAPL_MCASP_PFUNC_AHCLKX_RESETVAL (0x00000000u) > +/* AHCLKX Tokens */ > +#define OMAPL_MCASP_PFUNC_AHCLKX_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AHCLKX_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_ACLKX_MASK (0x04000000u) > +#define OMAPL_MCASP_PFUNC_ACLKX_SHIFT (0x0000001Au) > +#define OMAPL_MCASP_PFUNC_ACLKX_RESETVAL (0x00000000u) > +/* ACLKX Tokens */ > +#define OMAPL_MCASP_PFUNC_ACLKX_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_ACLKX_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AMUTE_MASK (0x02000000u) > +#define OMAPL_MCASP_PFUNC_AMUTE_SHIFT (0x00000019u) > +#define OMAPL_MCASP_PFUNC_AMUTE_RESETVAL (0x00000000u) > +/* AMUTE Tokens */ > +#define OMAPL_MCASP_PFUNC_AMUTE_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AMUTE_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR15_MASK (0x00008000u) > +#define OMAPL_MCASP_PFUNC_AXR15_SHIFT (0x0000000Fu) > +#define OMAPL_MCASP_PFUNC_AXR15_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR15_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR15_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR14_MASK (0x00004000u) > +#define OMAPL_MCASP_PFUNC_AXR14_SHIFT (0x0000000Eu) > +#define OMAPL_MCASP_PFUNC_AXR14_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR14_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR14_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR13_MASK (0x00002000u) > +#define OMAPL_MCASP_PFUNC_AXR13_SHIFT (0x0000000Du) > +#define OMAPL_MCASP_PFUNC_AXR13_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR13_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR13_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR12_MASK (0x00001000u) > +#define OMAPL_MCASP_PFUNC_AXR12_SHIFT (0x0000000Cu) > +#define OMAPL_MCASP_PFUNC_AXR12_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR12_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR12_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR11_MASK (0x00000800u) > +#define OMAPL_MCASP_PFUNC_AXR11_SHIFT (0x0000000Bu) > +#define OMAPL_MCASP_PFUNC_AXR11_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR11_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR11_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR10_MASK (0x00000400u) > +#define OMAPL_MCASP_PFUNC_AXR10_SHIFT (0x0000000Au) > +#define OMAPL_MCASP_PFUNC_AXR10_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR10_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR10_GPIO (0x00000001u) > +#define OMAPL_MCASP_PFUNC_AXR9_MASK (0x00000200u) > +#define OMAPL_MCASP_PFUNC_AXR9_SHIFT (0x00000009u) > +#define OMAPL_MCASP_PFUNC_AXR9_RESETVAL (0x00000000u) > +/* AXR9 Token */ > +#define OMAPL_MCASP_PFUNC_AXR9_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR9_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR8_MASK (0x00000100u) > +#define OMAPL_MCASP_PFUNC_AXR8_SHIFT (0x00000008u) > +#define OMAPL_MCASP_PFUNC_AXR8_RESETVAL (0x00000000u) > +/* AXR8 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR8_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR8_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR7_MASK (0x00000080u) > +#define OMAPL_MCASP_PFUNC_AXR7_SHIFT (0x00000007u) > +#define OMAPL_MCASP_PFUNC_AXR7_RESETVAL (0x00000000u) > +/* AXR7 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR7_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR7_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR6_MASK (0x00000040u) > +#define OMAPL_MCASP_PFUNC_AXR6_SHIFT (0x00000006u) > +#define OMAPL_MCASP_PFUNC_AXR6_RESETVAL (0x00000000u) > +/* AXR6 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR6_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR6_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR5_MASK (0x00000020u) > +#define OMAPL_MCASP_PFUNC_AXR5_SHIFT (0x00000005u) > +#define OMAPL_MCASP_PFUNC_AXR5_RESETVAL (0x00000000u) > +/* AXR5 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR5_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR5_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR4_MASK (0x00000010u) > +#define OMAPL_MCASP_PFUNC_AXR4_SHIFT (0x00000004u) > +#define OMAPL_MCASP_PFUNC_AXR4_RESETVAL (0x00000000u) > +/* AXR4 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR4_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR4_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR3_MASK (0x00000008u) > +#define OMAPL_MCASP_PFUNC_AXR3_SHIFT (0x00000003u) > +#define OMAPL_MCASP_PFUNC_AXR3_RESETVAL (0x00000000u) > +/* AXR3 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR3_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR3_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR2_MASK (0x00000004u) > +#define OMAPL_MCASP_PFUNC_AXR2_SHIFT (0x00000002u) > +#define OMAPL_MCASP_PFUNC_AXR2_RESETVAL (0x00000000u) > +/* AXR2 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR2_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR2_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR1_MASK (0x00000002u) > +#define OMAPL_MCASP_PFUNC_AXR1_SHIFT (0x00000001u) > +#define OMAPL_MCASP_PFUNC_AXR1_RESETVAL (0x00000000u) > +/* AXR1 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR1_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR1_GPIO (0x00000001u) > + > +#define OMAPL_MCASP_PFUNC_AXR0_MASK (0x00000001u) > +#define OMAPL_MCASP_PFUNC_AXR0_SHIFT (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR0_RESETVAL (0x00000000u) > +/* AXR0 Tokens */ > +#define OMAPL_MCASP_PFUNC_AXR0_MCASP (0x00000000u) > +#define OMAPL_MCASP_PFUNC_AXR0_GPIO (0x00000001u) > +#define OMAPL_MCASP_PFUNC_RESETVAL (0x00000000u) > + > +#define OMAPL_MCASP_PDIR_AFSR_MASK (0x80000000u) > +#define OMAPL_MCASP_PDIR_AFSR_SHIFT (0x0000001Fu) > +#define OMAPL_MCASP_PDIR_AFSR_RESETVAL (0x00000000u) > +/* AFSR Tokens */ > +#define OMAPL_MCASP_PDIR_AFSR_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AFSR_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AHCLKR_MASK (0x40000000u) > +#define OMAPL_MCASP_PDIR_AHCLKR_SHIFT (0x0000001Eu) > +#define OMAPL_MCASP_PDIR_AHCLKR_RESETVAL (0x00000000u) > +/* AHCLKR Tokens */ > +#define OMAPL_MCASP_PDIR_AHCLKR_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AHCLKR_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_ACLKR_MASK (0x20000000u) > +#define OMAPL_MCASP_PDIR_ACLKR_SHIFT (0x0000001Du) > +#define OMAPL_MCASP_PDIR_ACLKR_RESETVAL (0x00000000u) > +/* ACLKR Tokens */ > +#define OMAPL_MCASP_PDIR_ACLKR_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_ACLKR_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AFSX_MASK (0x10000000u) > +#define OMAPL_MCASP_PDIR_AFSX_SHIFT (0x0000001Cu) > +#define OMAPL_MCASP_PDIR_AFSX_RESETVAL (0x00000000u) > +/* AFSX Tokens */ > +#define OMAPL_MCASP_PDIR_AFSX_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AFSX_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AHCLKX_MASK (0x08000000u) > +#define OMAPL_MCASP_PDIR_AHCLKX_SHIFT (0x0000001Bu) > +#define OMAPL_MCASP_PDIR_AHCLKX_RESETVAL (0x00000000u) > +/* AHCLKX Tokens */ > +#define OMAPL_MCASP_PDIR_AHCLKX_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AHCLKX_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_ACLKX_MASK (0x04000000u) > +#define OMAPL_MCASP_PDIR_ACLKX_SHIFT (0x0000001Au) > +#define OMAPL_MCASP_PDIR_ACLKX_RESETVAL (0x00000000u) > +/* ACLKX Tokens */ > +#define OMAPL_MCASP_PDIR_ACLKX_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_ACLKX_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AMUTE_MASK (0x02000000u) > +#define OMAPL_MCASP_PDIR_AMUTE_SHIFT (0x00000019u) > +#define OMAPL_MCASP_PDIR_AMUTE_RESETVAL (0x00000000u) > +/* AMUTE Tokens */ > +#define OMAPL_MCASP_PDIR_AMUTE_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AMUTE_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR15_MASK (0x00008000u) > +#define OMAPL_MCASP_PDIR_AXR15_SHIFT (0x0000000Fu) > +#define OMAPL_MCASP_PDIR_AXR15_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR15_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR15_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR14_MASK (0x00004000u) > +#define OMAPL_MCASP_PDIR_AXR14_SHIFT (0x0000000Eu) > +#define OMAPL_MCASP_PDIR_AXR14_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR14_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR14_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR13_MASK (0x00002000u) > +#define OMAPL_MCASP_PDIR_AXR13_SHIFT (0x0000000Du) > +#define OMAPL_MCASP_PDIR_AXR13_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR13_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR13_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR12_MASK (0x00001000u) > +#define OMAPL_MCASP_PDIR_AXR12_SHIFT (0x0000000Cu) > +#define OMAPL_MCASP_PDIR_AXR12_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR12_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR12_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR11_MASK (0x00000800u) > +#define OMAPL_MCASP_PDIR_AXR11_SHIFT (0x0000000Bu) > +#define OMAPL_MCASP_PDIR_AXR11_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR11_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR11_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR10_MASK (0x00000400u) > +#define OMAPL_MCASP_PDIR_AXR10_SHIFT (0x0000000Au) > +#define OMAPL_MCASP_PDIR_AXR10_RESETVAL (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR10_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR10_OUTPUT (0x00000001u) > +#define OMAPL_MCASP_PDIR_AXR9_MASK (0x00000200u) > +#define OMAPL_MCASP_PDIR_AXR9_SHIFT (0x00000009u) > +#define OMAPL_MCASP_PDIR_AXR9_RESETVAL (0x00000000u) > +/* AXR9 Tokens */ > +#define OMAPL_MCASP_PDIR_AXR9_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR9_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR8_MASK (0x00000100u) > +#define OMAPL_MCASP_PDIR_AXR8_SHIFT (0x00000008u) > +#define OMAPL_MCASP_PDIR_AXR8_RESETVAL (0x00000000u) > +/* AXR8 Tokens */ > +#define OMAPL_MCASP_PDIR_AXR8_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR8_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR7_MASK (0x00000080u) > +#define OMAPL_MCASP_PDIR_AXR7_SHIFT (0x00000007u) > +#define OMAPL_MCASP_PDIR_AXR7_RESETVAL (0x00000000u) > +/*----AXR7 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR7_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR7_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR6_MASK (0x00000040u) > +#define OMAPL_MCASP_PDIR_AXR6_SHIFT (0x00000006u) > +#define OMAPL_MCASP_PDIR_AXR6_RESETVAL (0x00000000u) > +/*----AXR6 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR6_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR6_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR5_MASK (0x00000020u) > +#define OMAPL_MCASP_PDIR_AXR5_SHIFT (0x00000005u) > +#define OMAPL_MCASP_PDIR_AXR5_RESETVAL (0x00000000u) > +/*----AXR5 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR5_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR5_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR4_MASK (0x00000010u) > +#define OMAPL_MCASP_PDIR_AXR4_SHIFT (0x00000004u) > +#define OMAPL_MCASP_PDIR_AXR4_RESETVAL (0x00000000u) > +/*----AXR4 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR4_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR4_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR3_MASK (0x00000008u) > +#define OMAPL_MCASP_PDIR_AXR3_SHIFT (0x00000003u) > +#define OMAPL_MCASP_PDIR_AXR3_RESETVAL (0x00000000u) > +/*----AXR3 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR3_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR3_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR2_MASK (0x00000004u) > +#define OMAPL_MCASP_PDIR_AXR2_SHIFT (0x00000002u) > +#define OMAPL_MCASP_PDIR_AXR2_RESETVAL (0x00000000u) > +/*----AXR2 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR2_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR2_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR1_MASK (0x00000002u) > +#define OMAPL_MCASP_PDIR_AXR1_SHIFT (0x00000001u) > +#define OMAPL_MCASP_PDIR_AXR1_RESETVAL (0x00000000u) > +/*----AXR1 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR1_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR1_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_AXR0_MASK (0x00000001u) > +#define OMAPL_MCASP_PDIR_AXR0_SHIFT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR0_RESETVAL (0x00000000u) > +/*----AXR0 Tokens----*/ > +#define OMAPL_MCASP_PDIR_AXR0_INPUT (0x00000000u) > +#define OMAPL_MCASP_PDIR_AXR0_OUTPUT (0x00000001u) > + > +#define OMAPL_MCASP_PDIR_RESETVAL (0x00000000u) > + > +#define OMAPL_MCASP_ACLKXCTL_CLKXP_MASK (0x00000080u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXP_SHIFT (0x00000007u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXP_RESETVAL (0x00000000u) > +/*----CLKXP Tokens----*/ > +#define OMAPL_MCASP_ACLKXCTL_CLKXP_RISINGEDGE (0x00000000u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXP_FALLINGEDGE (0x00000001u) > + > +#define OMAPL_MCASP_ACLKXCTL_ASYNC_MASK (0x00000040u) > +#define OMAPL_MCASP_ACLKXCTL_ASYNC_SHIFT (0x00000006u) > +#define OMAPL_MCASP_ACLKXCTL_ASYNC_RESETVAL (0x00000001u) > +/*----ASYNC Tokens----*/ > +#define OMAPL_MCASP_ACLKXCTL_ASYNC_SYNC (0x00000000u) > +#define OMAPL_MCASP_ACLKXCTL_ASYNC_ASYNC (0x00000001u) > + > +#define OMAPL_MCASP_ACLKXCTL_CLKXM_MASK (0x00000020u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXM_SHIFT (0x00000005u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXM_RESETVAL (0x00000001u) > +/*----CLKXM Tokens----*/ > +#define OMAPL_MCASP_ACLKXCTL_CLKXM_EXTERNAL (0x00000000u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXM_INTERNAL (0x00000001u) > + > +#define OMAPL_MCASP_ACLKXCTL_CLKXDIV_MASK (0x0000001Fu) > +#define OMAPL_MCASP_ACLKXCTL_CLKXDIV_SHIFT (0x00000000u) > +#define OMAPL_MCASP_ACLKXCTL_CLKXDIV_RESETVAL (0x00000000u) > + > +#define OMAPL_MCASP_ACLKXCTL_RESETVAL (0x00000060u) > + > +/* AHCLKXCTL */ > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXM_MASK (0x00008000u) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXM_SHIFT (0x0000000Fu) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXM_RESETVAL (0x00000001u) > +/*----HCLKXM Tokens----*/ > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXM_EXTERNAL (0x00000000u) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXM_INTERNAL (0x00000001u) > + > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXP_MASK (0x00004000u) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXP_SHIFT (0x0000000Eu) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXP_RESETVAL (0x00000000u) > +/*----HCLKXP Tokens----*/ > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXP_NOTINVERTED (0x00000000u) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXP_INVERTED (0x00000001u) > + > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_MASK (0x00000FFFu) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_SHIFT (0x00000000u) > +#define OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_RESETVAL (0x00000000u) > + > +#define OMAPL_MCASP_AHCLKXCTL_RESETVAL (0x00008000u) > + > +#define MCASP_SUART_GBLCTL (0X00000000) > +#define MCASP_SUART_RGBLCTL (0X00000000) > +#define MCASP_SUART_XGBLCTL (0X00000000) > +#define MCASP_SUART_RMASK_8 (0x000000FF) > +#define MCASP_SUART_RMASK_16 (0x0000FFFF) > +#define MCASP_SUART_RFMT_8 (0x0000A038) > +#define MCASP_SUART_RFMT_16 (0x0000A078) > +#define MCASP_SUART_FSRM (0X00000002) > +#define MCASP_SUART_CLKRM_CLKRP (0X000000A0) > +#define MCASP_SUART_HCLKRP (0X00008000) > +#define MCASP_SUART_RTDMS0 (0X00000001) > +#define MCASP_SUART_RSYNCERR (0X00000002) > +#define MCASP_SUART_RMAX_RPS_256 (0x00FF0008) > +#define MCASP_SUART_XMASK_0_31 (0X0000FFFF) > +#define MCASP_SUART_XBUSEL_XSSZ_16_XPAD_0 (0x00002078) > +#define MCASP_SUART_FSXM (0x00000002) > +#define MCASP_SUART_CLKXM_ASYNC_CLKXP (0x000000E0) > +#define MCASP_SUART_HCLKXM (0x00008000) > +#define MCASP_SUART_XTDMS0 (0X00000001) > +#define MCASP_SUART_XSYNCERR (0x00000002) > +#define MCASP_SUART_XMAX_XPS_256 (0x00FF0008) > +#define MCASP_SUART_SRCTL_DISMOD (0x0000000c) > +#define MCASP_SUART_DIT_DISABLE (0X00000000) > +#define MCASP_SUART_LOOPBACK_DISABLE (0x00000000) > +#define MCASP_SUART_AMUTE_DISABLE (0X00000000) > +#define MCASP_SUART_XSTAT (0x0000FFFF) > +#define MCASP_SUART_RSTAT (0x0000FFFF) > + > +/* SUART REGS */ > + > +/* PRU0 DATA RAM base address */ > +#define PRU0_DATARAM_OFFSET (0x0000u) > +/* PRU1 DATA RAM base address */ > +#define PRU1_DATARAM_OFFSET (0x2000u) > + > +/* PRU0 DATA RAM size */ > +#define PRU0_DATARAM_SIZE (0x200u) > +/* PRU1 DATA RAM size */ > +#define PRU1_DATARAM_SIZE (0x200u) > + > +#define PRU_SUART_PRU0_CH0_OFFSET (0x0000) > +#define PRU_SUART_PRU0_CH1_OFFSET (0x0010) > +#define PRU_SUART_PRU0_CH2_OFFSET (0x0020) > +#define PRU_SUART_PRU0_CH3_OFFSET (0x0030) > +#define PRU_SUART_PRU0_CH4_OFFSET (0x0040) > +#define PRU_SUART_PRU0_CH5_OFFSET (0x0050) > +#define PRU_SUART_PRU0_CH6_OFFSET (0x0060) > +#define PRU_SUART_PRU0_CH7_OFFSET (0x0070) > +#define PRU_SUART_PRU0_IMR_OFFSET (0x0080) > +/* Interrupt Mask Register */ > +#define PRU_SUART_PRU0_ISR_OFFSET (0x0082) > +/* Interrupt Status Register */ > +#define PRU_SUART_PRU0_ID_ADDR (0x0084) > +/* PRU ID Register */ > +#define PRU_SUART_PRU0_RX_TX_MODE (0x0085) > +#define PRU_SUART_PRU0_DELAY_OFFSET (0x0086) > +#define PRU_SUART_PRU0_IDLE_TIMEOUT_OFFSET (0x0088) > + > +/* PRU 1 Macros */ > +#define PRU_SUART_PRU1_CH0_OFFSET (0x2000) > +#define PRU_SUART_PRU1_CH1_OFFSET (0x2010) > +#define PRU_SUART_PRU1_CH2_OFFSET (0x2020) > +#define PRU_SUART_PRU1_CH3_OFFSET (0x2030) > +#define PRU_SUART_PRU1_CH4_OFFSET (0x2040) > +#define PRU_SUART_PRU1_CH5_OFFSET (0x2050) > +#define PRU_SUART_PRU1_CH6_OFFSET (0x2060) > +#define PRU_SUART_PRU1_CH7_OFFSET (0x2070) > +#define PRU_SUART_PRU1_IMR_OFFSET (0x2080) > +#define PRU_SUART_PRU1_ISR_OFFSET (0x2082) > +#define PRU_SUART_PRU1_ID_ADDR (0x2084) > +#define PRU_SUART_PRU1_RX_TX_MODE (0x2085) > +#define PRU_SUART_PRU1_DELAY_OFFSET (0x2086) > +#define PRU_SUART_PRU1_IDLE_TIMEOUT_OFFSET (0x2088) > + > +/* SUART Channel Control Register bit descriptions */ > +#define PRU_SUART_CH_CTRL_MODE_SHIFT 0x0000 > +#define PRU_SUART_CH_CTRL_MODE_MASK 0x0003 > +#define PRU_SUART_CH_CTRL_TX_MODE 0x0001 > +#define PRU_SUART_CH_CTRL_RX_MODE 0x0002 > + > +/* Service Request */ > +#define PRU_SUART_CH_CTRL_SREQ_SHIFT 0x0002 > +#define PRU_SUART_CH_CTRL_SREQ_MASK 0x0004 > +#define PRU_SUART_CH_CTRL_SREQ 0x0001 > + > +/* McASP Instance */ > +#define PRU_SUART_CH_CTRL_MCASP_SHIFT 0x0003 > +#define PRU_SUART_CH_CTRL_MCASP_MASK 0x0018 > +#define PRU_SUART_CH_CTRL_SR_SHIFT 0x0008 > +#define PRU_SUART_CH_CTRL_SR_MASK 0x0F00 > + > +/* SUART channel configuration1 register descriptions */ > + > +/* clock divisor - relative baud value */ > +#define PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT 0x0000 > +#define PRU_SUART_CH_CONFIG1_DIVISOR_MASK 0x03FF > +/* oversampling */ > +#define PRU_SUART_CH_CONFIG1_OVS_SHIFT 0x000A > +#define PRU_SUART_CH_CONFIG1_OVS_MASK 0x0C00 > + > +/* SUART channel configuration2 register descriptions */ > +/* Bits per character */ > +#define PRU_SUART_CH_CONFIG2_BITPERCHAR_SHIFT 0x0000 > +#define PRU_SUART_CH_CONFIG2_BITPERCHAR_MASK 0x000F > + > +/* Bits per character */ > +#define PRU_SUART_CH_CONFIG2_DATALEN_SHIFT 0x0008 > +#define PRU_SUART_CH_CONFIG2_DATALEN_MASK 0x0F00 > + > +/* SUART Channel STATUS Register*/ > +#define PRU_SUART_CH_STATUS_EN_BIT_MASK 0x8000 > + > +/* SUART Channel register offsets */ > +#define PRU_SUART_CH_CTRL_OFFSET 0x00 > +#define PRU_SUART_CH_CONFIG1_OFFSET 0x02 > +#define PRU_SUART_CH_CONFIG2_OFFSET 0x04 > +#define PRU_SUART_CH_TXRXSTATUS_OFFSET 0x06 > +#define PRU_SUART_CH_TXRXDATA_OFFSET 0x08 > +#define PRU_SUART_CH_BYTESDONECNTR_OFFSET 0x0C > + > +/* SUART Event Numbers macros */ > +#define PRU_SUART0_TX_EVT 34 > +#define PRU_SUART0_RX_EVT 35 > +#define PRU_SUART1_TX_EVT 36 > +#define PRU_SUART1_RX_EVT 37 > +#define PRU_SUART2_TX_EVT 38 > +#define PRU_SUART2_RX_EVT 39 > +#define PRU_SUART3_TX_EVT 40 > +#define PRU_SUART3_RX_EVT 41 > +#define PRU_SUART4_TX_EVT 42 > +#define PRU_SUART4_RX_EVT 43 > +#define PRU_SUART5_TX_EVT 44 > +#define PRU_SUART5_RX_EVT 45 > +#define PRU_SUART6_TX_EVT 46 > +#define PRU_SUART6_RX_EVT 47 > +#define PRU_SUART7_TX_EVT 48 > +#define PRU_SUART7_RX_EVT 49 > + > +#define PRU_SUART0_TX_EVT_BIT BIT(2) > +#define PRU_SUART0_RX_EVT_BIT BIT(3) > +#define PRU_SUART1_TX_EVT_BIT BIT(4) > +#define PRU_SUART1_RX_EVT_BIT BIT(5) > +#define PRU_SUART2_TX_EVT_BIT BIT(6) > +#define PRU_SUART2_RX_EVT_BIT BIT(7) > +#define PRU_SUART3_TX_EVT_BIT BIT(8) > +#define PRU_SUART3_RX_EVT_BIT BIT(9) > +#define PRU_SUART4_TX_EVT_BIT BIT(10) > +#define PRU_SUART4_RX_EVT_BIT BIT(11) > +#define PRU_SUART5_TX_EVT_BIT BIT(12) > +#define PRU_SUART5_RX_EVT_BIT BIT(13) > +#define PRU_SUART6_TX_EVT_BIT BIT(14) > +#define PRU_SUART6_RX_EVT_BIT BIT(15) > +#define PRU_SUART7_TX_EVT_BIT BIT(16) > +#define PRU_SUART7_RX_EVT_BIT BIT(17) > + > +/* Total number of baud rates supported */ > +#define SUART_NUM_OF_BAUDS_SUPPORTED 13 > + > +#define MCASP_PDIR_VAL ( \ > + OMAPL_MCASP_PDIR_AFSR_OUTPUT< + OMAPL_MCASP_PDIR_AHCLKR_OUTPUT< + OMAPL_MCASP_PDIR_ACLKR_OUTPUT< + OMAPL_MCASP_PDIR_AFSX_OUTPUT< + OMAPL_MCASP_PDIR_AHCLKX_OUTPUT< + OMAPL_MCASP_PDIR_ACLKX_OUTPUT< + > +/* > + * This enum is used to specify the direction of the channel in UART > + */ > +enum SUART_CHN_DIR { > + SUART_CHN_TX = 1, > + SUART_CHN_RX = 2 > +}; > + > +/* > + * This enum is used to specify the state of the channel in UART. It > + * is either enabled or disabled. > + */ > +enum SUART_CHN_STATE { > + SUART_CHN_DISABLED = 0, > + SUART_CHN_ENABLED = 1 > +}; > + > +enum SUART_EN_BITSPERCHAR { > + ePRU_SUART_DATA_BITS6 = 8, > + ePRU_SUART_DATA_BITS7, > + ePRU_SUART_DATA_BITS8, > + ePRU_SUART_DATA_BITS9, > + ePRU_SUART_DATA_BITS10, > + ePRU_SUART_DATA_BITS11, > + ePRU_SUART_DATA_BITS12 > +}; > + > +enum SUART_EN_UARTNUM { > + ePRU_SUART_NUM_1 = 1, > + ePRU_SUART_NUM_2, > + ePRU_SUART_NUM_3, > + ePRU_SUART_NUM_4, > + ePRU_SUART_NUM_5, > + ePRU_SUART_NUM_6, > + ePRU_SUART_NUM_7, > + ePRU_SUART_NUM_8 > +}; > + > +enum SUART_EN_UARTTYPE { > + ePRU_SUART_HALF_TX = 1, > + ePRU_SUART_HALF_RX, > + ePRU_SUART_FULL_TX_RX, > + ePRU_SUART_HALF_TX_DISABLED = 4, > + ePRU_SUART_HALF_RX_DISABLED = 8 > +}; > + > +enum SUART_EN_TXCHANNEL { > + ePRU_SUART_TX_CH0 = 0, > + ePRU_SUART_TX_CH1, > + ePRU_SUART_TX_CH2, > + ePRU_SUART_TX_CH3, > + ePRU_SUART_TX_CH4, > + ePRU_SUART_TX_CH5, > + ePRU_SUART_TX_CH6, > + ePRU_SUART_TX_CH7 > +}; > + > +enum SUART_EN_RXCHANNEL { > + ePRU_SUART_RX_CH0 = 0, > + ePRU_SUART_RX_CH1, > + ePRU_SUART_RX_CH2, > + ePRU_SUART_RX_CH3, > + ePRU_SUART_RX_CH4, > + ePRU_SUART_RX_CH5, > + ePRU_SUART_RX_CH6, > + ePRU_SUART_RX_CH7 > +}; > + > +enum SUART_EN_UART_STATUS { > + ePRU_SUART_UART_FREE = 0, > + ePRU_SUART_UART_IN_USE > +}; > + > +struct pru_suart_cnh_cntrl_config1 { > + u32 mode:2; > + u32 service_req:1; > + u32 asp_id:2; > + u32 reserved1:3; > + u32 serializer_num:4; > + u32 reserved2:4; > + u32 presacler:10; > + u32 over_sampling:2; > + u32 framing_mask:1; > + u32 break_mask:1; > + u32 timeout_mask:1; > + u32 reserved3:1; > +}; > + > +struct pru_suart_chn_config2_status { > + u32 bits_per_char:4; > + u32 reserved1:4; > + u32 data_len:4; > + u32 reserved2:4; > + u32 txrx_ready:1; > + u32 txrx_complete:1; > + u32 txrx_error:1; > + u32 txrx_underrun:1; > + u32 framing_error:1; > + u32 break_error:1; > + u32 timeout_error:1; > + u32 reserved3:8; > + u32 chn_state:1; > +}; > + > +struct pru_suart_regs_ovly { > + struct pru_suart_cnh_cntrl_config1 ch_ctrl_config1; > + struct pru_suart_chn_config2_status ch_config2_txrx_status; > + u32 ch_txrx_data; > + u32 reserved1; > +}; > + > +struct pru_suart_tx_cntx_priv { > + u32 asp_xsrctl_base; > + u32 asp_xbuf_base; > + u16 buff_addr; > + u8 buff_size; > + u8 bits_loaded; > +}; > + > +struct pru_suart_rx_cntx_priv { > + u32 asp_rbuf_base; > + u32 asp_rsrctl_base; > + u32 reserved1; > + u32 reserved2; > + u32 reserved3; > + u32 reserved4; > +}; > + > +struct suart_config { > + u8 tx_serializer; > + u8 rx_serializer; > + u16 tx_clk_divisor; > + u16 rx_clk_divisor; > + u8 tx_bits_per_char; > + u8 rx_bits_per_char; > + u8 oversampling; > + u8 bi_inter_mask; > + u8 fe_intr_mask; > +}; > + > +struct suart_handle { > + u16 uart_num; > + u16 uart_type; > + u16 uart_tx_channel; > + u16 uart_rx_channel; > + u16 uart_status; > +}; > + > +struct pruss_suart_iomap { > + void *mcasp_io_addr; > + void *p_fifo_buff_phys_base; > + void *p_fifo_buff_virt_base; > + u32 pru_clk_freq; > +}; > + > +/* MCASP */ > +struct omapl_mcasp_regs_ovly { > + u32 REVID; > + u32 RSVD0[3]; > + u32 PFUNC; > + u32 PDIR; > + u32 PDOUT; > + u32 PDIN; > + u32 PDCLR; > + u32 RSVD1[8]; > + u32 GBLCTL; > + u32 AMUTE; > + u32 DLBCTL; > + u32 DITCTL; > + u32 RSVD2[3]; > + u32 RGBLCTL; > + u32 RMASK; > + u32 RFMT; > + u32 AFSRCTL; > + u32 ACLKRCTL; > + u32 AHCLKRCTL; > + u32 RTDM; > + u32 RINTCTL; > + u32 RSTAT; > + u32 RSLOT; > + u32 RCLKCHK; > + u32 REVTCTL; > + u32 RSVD3[4]; > + u32 XGBLCTL; > + u32 XMASK; > + u32 XFMT; > + u32 AFSXCTL; > + u32 ACLKXCTL; > + u32 AHCLKXCTL; > + u32 XTDM; > + u32 XINTCTL; > + u32 XSTAT; > + u32 XSLOT; > + u32 XCLKCHK; > + u32 XEVTCTL; > + u32 RSVD4[12]; > + u32 DITCSRA0; > + u32 DITCSRA1; > + u32 DITCSRA2; > + u32 DITCSRA3; > + u32 DITCSRA4; > + u32 DITCSRA5; > + u32 DITCSRB0; > + u32 DITCSRB1; > + u32 DITCSRB2; > + u32 DITCSRB3; > + u32 DITCSRB4; > + u32 DITCSRB5; > + u32 DITUDRA0; > + u32 DITUDRA1; > + u32 DITUDRA2; > + u32 DITUDRA3; > + u32 DITUDRA4; > + u32 DITUDRA5; > + u32 DITUDRB0; > + u32 DITUDRB1; > + u32 DITUDRB2; > + u32 DITUDRB3; > + u32 DITUDRB4; > + u32 DITUDRB5; > + u32 RSVD5[8]; > + u32 SRCTL0; > + u32 SRCTL1; > + u32 SRCTL2; > + u32 SRCTL3; > + u32 SRCTL4; > + u32 SRCTL5; > + u32 SRCTL6; > + u32 SRCTL7; > + u32 SRCTL8; > + u32 SRCTL9; > + u32 SRCTL10; > + u32 SRCTL11; > + u32 SRCTL12; > + u32 SRCTL13; > + u32 SRCTL14; > + u32 SRCTL15; > + u32 RSVD6[16]; > + u32 XBUF0; > + u32 XBUF1; > + u32 XBUF2; > + u32 XBUF3; > + u32 XBUF4; > + u32 XBUF5; > + u32 XBUF6; > + u32 XBUF7; > + u32 XBUF8; > + u32 XBUF9; > + u32 XBUF10; > + u32 XBUF11; > + u32 XBUF12; > + u32 XBUF13; > + u32 XBUF14; > + u32 XBUF15; > + u32 RSVD7[16]; > + u32 RBUF0; > + u32 RBUF1; > + u32 RBUF2; > + u32 RBUF3; > + u32 RBUF4; > + u32 RBUF5; > + u32 RBUF6; > + u32 RBUF7; > + u32 RBUF8; > + u32 RBUF9; > + u32 RBUF10; > + u32 RBUF11; > + u32 RBUF12; > + u32 RBUF13; > + u32 RBUF14; > + u32 RBUF15; > +}; > + > +/* > + * SUART Config regs > + */ > +struct suart_struct_pru_regs { > + u16 chn_ctrl; > + u16 chn_config1; > + u16 chn_config2; > + u16 chn_txrx_status; > + u32 chn_txrx_data; > +}; > + > +extern s16 pru_softuart_init(struct device *dev, u32 tx_baud_value, > + u32 rx_baud_value, u32 oversampling, > + u8 *pru_suart_emu_code, u32 fw_size, > + struct pruss_suart_iomap *pruss_ioaddr); > + > +extern s16 pru_softuart_open(struct suart_handle *h_suart); > + > +extern s16 pru_softuart_close(struct suart_handle *h_uart); > + > +extern s16 pru_softuart_setbaud(struct device *dev, > + struct suart_handle *h_uart, > + u16 tx_clk_divisor, u16 rx_clk_divisor); > + > +extern s16 pru_softuart_setdatabits(struct device *dev, > + struct suart_handle *h_uart, > + u16 tx_data_bits, u16 rx_data_bits); > + > +extern s16 pru_softuart_setconfig(struct device *dev, > + struct suart_handle *h_uart, > + struct suart_config *config_uart); > + > +extern s16 pru_softuart_getconfig(struct device *dev, > + struct suart_handle *h_uart, > + struct suart_config *config_uart); > + > +extern s32 pru_softuart_pending_tx_request(struct device *dev); > + > +extern s16 pru_softuart_write(struct device *dev, > + struct suart_handle *h_uart, > + u32 *pt_tx_data_buf, u16 data_len); > + > +extern s16 pru_softuart_read(struct device *dev, > + struct suart_handle *h_uart, > + u32 *pt_data_buf, u16 data_len); > + > +extern s32 suart_intr_clrmask(struct device *dev, u16 uart_num, > + u32 txrxmode, > + u32 intrmask); > + > +extern s16 pru_softuart_clr_tx_status(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 pru_softuart_get_tx_status(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 pru_softuart_clr_rx_status(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 pru_softuart_get_rx_status(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 pru_softuart_get_isrstatus(struct device *dev, u16 uart_num, > + u16 *txrx_flag); > + > +extern s32 pru_intr_clr_isrstatus(struct device *dev, u16 uart_num, > + u32 txrxmode); > + > +extern s32 suart_intr_getmask(struct device *dev, u16 uart_num, > + u32 txrxmode, > + u32 intrmask); > + > +extern s32 suart_intr_setmask(struct device *dev, u16 uart_num, > + u32 txrxmode, u32 intrmask); > + > +extern s16 pru_softuart_get_tx_data_len(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 pru_softuart_get_rx_data_len(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s16 suart_arm_to_pru_intr(struct device *dev, u16 uart_num); > + > +extern void pru_mcasp_deinit(void); > + > +extern s16 pru_softuart_read_data(struct device *dev, > + struct suart_handle *h_uart, > + u8 *p_data_buffer, s32 max_len, > + u32 *pdata_read); > + > +extern s16 pru_softuart_stop_receive(struct device *dev, > + struct suart_handle *h_uart); > + > +extern s32 suart_pru_to_host_intr_enable(struct device *dev, > + u16 uart_num, > + u32 txrxmode, s32 flag); > + > +extern void pru_set_fifo_timeout(struct device *dev, s16 timeout); > + > +extern void suart_mcasp_config(u32 tx_baud_value, > + u32 rx_baud_value, u32 oversampling, > + struct pruss_suart_iomap *pruss_ioaddr); > + > +extern void suart_mcasp_reset(struct pruss_suart_iomap *pruss_ioaddr); > + > +extern short suart_asp_baud_set(u32 tx_baud_value, > + u32 rx_baud_value, u32 oversampling, > + struct pruss_suart_iomap *pruss_ioaddr); > + > +extern short suart_asp_serializer_deactivate(u16 sr_num, > + struct pruss_suart_iomap *pruss_ioaddr); > + > +extern void suart_mcasp_tx_serialzier_set(u32 serializer_num, > + struct pruss_suart_iomap *pruss_ioaddr); > +#endif > diff --git a/drivers/tty/serial/pruss_suart_api.c > b/drivers/tty/serial/pruss_suart_api.c > new file mode 100644 > index 0000000..b483b90 > --- /dev/null > +++ b/drivers/tty/serial/pruss_suart_api.c > @@ -0,0 +1,1757 @@ > +/* > + * Copyright (C) 2010 Texas Instruments Incorporated > + * Author: Jitendra Kumar > + * > + * This program is free software; you can redistribute it and/or modify > it > + * under the terms of the GNU General Public License as published by the > + * Free Software Foundation version 2. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, > + * whether express or implied; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + */ > + > +#include > +#include > +#include > +#include > +#include "pruss_suart.h" > + > +static u8 uart_statu_table[8]; > +static struct pruss_suart_iomap suart_iomap; > + > +static u32 uart_rx[8] = {PRU_SUART0_CONFIG_RX_SER, > PRU_SUART1_CONFIG_RX_SER, > + PRU_SUART2_CONFIG_RX_SER, PRU_SUART3_CONFIG_RX_SER, > + PRU_SUART4_CONFIG_RX_SER, PRU_SUART5_CONFIG_RX_SER, > + PRU_SUART6_CONFIG_RX_SER, PRU_SUART7_CONFIG_RX_SER}; > + > +static u32 uart_tx[8] = {PRU_SUART0_CONFIG_TX_SER, > PRU_SUART1_CONFIG_TX_SER, > + PRU_SUART2_CONFIG_TX_SER, PRU_SUART3_CONFIG_TX_SER, > + PRU_SUART4_CONFIG_TX_SER, PRU_SUART5_CONFIG_TX_SER, > + PRU_SUART6_CONFIG_TX_SER, PRU_SUART7_CONFIG_TX_SER}; > + > +static u32 uart_config[8] = {PRU_SUART0_CONFIG_DUPLEX, > PRU_SUART1_CONFIG_DUPLEX, > + PRU_SUART2_CONFIG_DUPLEX, PRU_SUART3_CONFIG_DUPLEX, > + PRU_SUART4_CONFIG_DUPLEX, PRU_SUART5_CONFIG_DUPLEX, > + PRU_SUART6_CONFIG_DUPLEX, PRU_SUART7_CONFIG_DUPLEX}; > + > +static s16 pru_softuart_clr_rx_fifo(struct device *dev, > + struct suart_handle *h_uart); > +static s16 arm_to_pru_intr_init(struct device *dev); > + > +#if (PRU_ACTIVE == BOTH_PRU) > +static void pru_set_ram_data(struct device *dev, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + u32 datatowrite; > + u32 i; > + struct pru_suart_regs_ovly *pru_suart_regs = PRU0_DATARAM_OFFSET; > + u32 *p_sr_ctl_addr = (u32 *)(pruss_ioaddr->mcasp_io_addr + 0x180); > + struct pru_suart_tx_cntx_priv *pru_suart_tx_priv = NULL; > + struct pru_suart_rx_cntx_priv *pru_suart_rx_priv = NULL; > + > + /* RX PRU - 0 Chanel 0-7 context information */ > + for (i = 0; i < 8; i++, pru_suart_regs++) { > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + 0x3, SUART_CHN_RX); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0xF << SERIALIZER_OFFSET), > + ((0xF & uart_rx[i]) << SERIALIZER_OFFSET)); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0x3 << SUART_DEFAULT_OVRSMPL_OFFSET), > + (SUART_DEFAULT_OVRSMPL << > + SUART_DEFAULT_OVRSMPL_OFFSET)); > + pruss_rmwl(dev, > + (u32) &pru_suart_regs->ch_config2_txrx_status, > + 0xF, 8); > + if ((uart_config[i] & PRU_SUART_HALF_RX_DISABLED) == > + PRU_SUART_HALF_RX_DISABLED) { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_DISABLED << SUART_CHN_OFFSET)); > + } else { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_ENABLED << SUART_CHN_OFFSET)); > + __raw_writel(MCASP_SRCTL_RX_MODE, p_sr_ctl_addr + > + uart_rx[i]); > + } > + /* > + * RX is active by default, write the dummy received data at > + * PRU RAM addr 0x1FC to avoid memory corruption. > + */ > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_txrx_data, > + 0xFFFF, RX_DEFAULT_DATA_DUMP_ADDR); > + pruss_rmwl(dev, (u32) &pru_suart_regs->reserved1, > + 0xFFFF, 0); > + /* SUART1 RX context base addr */ > + pru_suart_rx_priv = (struct pru_suart_rx_cntx_priv *) > + (PRU0_DATARAM_OFFSET + (0x090 + (i * 0x020))); > + datatowrite = (MCASP_RBUF_BASE_ADDR + (uart_rx[i] << 2)); > + pruss_writel(dev, (u32) &pru_suart_rx_priv->asp_rbuf_base, > + &datatowrite, 1); > + datatowrite = (MCASP_SRCTL_BASE_ADDR + (uart_rx[i] << 2)); > + pruss_writel(dev, (u32) &pru_suart_rx_priv->asp_rsrctl_base, > + &datatowrite, 1); > + } > + > + /* ****************** PRU1 RAM BASE ADDR ************************ */ > + pru_suart_regs = (struct pru_suart_regs_ovly *) PRU1_DATARAM_OFFSET; > + > + /* ******************* TX PRU - 1 *********************** */ > + /* Channel 0-7 context information */ > + for (i = 0; i < 8; i++, pru_suart_regs++) { > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + 0x3, SUART_CHN_TX); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0xF << SERIALIZER_OFFSET), > + ((0xF & uart_tx[i]) << SERIALIZER_OFFSET)); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0x3 << SUART_DEFAULT_OVRSMPL_OFFSET), > + (SUART_DEFAULT_OVRSMPL << > + SUART_DEFAULT_OVRSMPL_OFFSET)); > + pruss_rmwl(dev, > + (u32) &pru_suart_regs->ch_config2_txrx_status, > + 0xF, 8); > + if ((uart_config[i] & PRU_SUART_HALF_TX_DISABLED) == > + PRU_SUART_HALF_TX_DISABLED) { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_DISABLED << SUART_CHN_OFFSET)); > + } else { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_ENABLED << SUART_CHN_OFFSET)); > + __raw_writel(MCASP_SRCTL_TX_MODE, > + p_sr_ctl_addr + uart_tx[i]); > + } > + pruss_rmwl(dev, (u32) &pru_suart_regs->reserved1, > + 0xFFFF, 1); > + /* SUART1 TX context base addr */ > + pru_suart_tx_priv = (struct pru_suart_tx_cntx_priv *) > + (PRU1_DATARAM_OFFSET + (0x0B0 + (i * 0x02C))); > + datatowrite = (MCASP_SRCTL_BASE_ADDR + (uart_tx[i] << 2)); > + pruss_writel(dev, (u32) &pru_suart_tx_priv->asp_xsrctl_base, > + &datatowrite, 1); > + datatowrite = (MCASP_XBUF_BASE_ADDR + (uart_tx[i] << 2)); > + pruss_writel(dev, (u32) &pru_suart_tx_priv->asp_xbuf_base, > + &datatowrite, 1); > + /* SUART1 TX formatted data base addr */ > + datatowrite = (0x0090 + (i * 0x002C)); > + pruss_writel(dev, (u32) &pru_suart_tx_priv->buff_addr, > + &datatowrite, 1); > + } > +} > +#else > +static void pru_set_ram_data(struct device *dev, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + > + struct pru_suart_regs_ovly *pru_suart_regs = > + (struct pru_suart_regs_ovly *)pruss_ioaddr->pru_io_addr; > + u32 i; > + u32 *p_sr_ctl_addr = (u32 *)(pruss_ioaddr->mcasp_io_addr + 0x180); > + struct pru_suart_tx_cntx_priv *pru_suart_tx_priv = NULL; > + struct pru_suart_rx_cntx_priv *pru_suart_rx_priv = NULL; > + > + /* ***************** UART 0 ************************ */ > + /* Channel 0 context information is Tx */ > + for (i = 0; i < 4; i++, pru_suart_regs++) { > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + 0x3, SUART_CHN_TX); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0xF << SERIALIZER_OFFSET), > + ((0xF & uart_tx[i]) << SERIALIZER_OFFSET)); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0x3 << SUART_DEFAULT_OVRSMPL_OFFSET), > + (SUART_DEFAULT_OVRSMPL << > + SUART_DEFAULT_OVRSMPL_OFFSET)); > + pruss_rmwl(dev, > + (u32) &pru_suart_regs->ch_config2_txrx_status, > + 0xF, 8); > + if ((uart_config[i] & PRU_SUART_HALF_TX_DISABLED) == > + PRU_SUART_HALF_TX_DISABLED){ > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_DISABLED << SUART_CHN_OFFSET)); > + } else { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_ENABLED << SUART_CHN_OFFSET)); > + __raw_writel(MCASP_SRCTL_TX_MODE, > + p_sr_ctl_addr + uart_tx[i]); > + } > + pruss_rmwl(dev, (u32) &pru_suart_regs->reserved1, > + 0xFFFF, 1); > + /* SUART1 TX context base addr */ > + pru_suart_tx_priv = (struct pru_suart_tx_cntx_priv *) > + (PRU0_DATARAM_OFFSET + (0x0B0 + (i * 0x50))); > + pruss_writel(dev, (u32) &pru_suart_tx_priv->asp_xsrctl_base, > + (MCASP_SRCTL_BASE_ADDR + (uart_tx[i] << 2)), 1); > + pruss_writel(dev, (u32) &pru_suart_tx_priv->asp_xbuf_base, > + (MCASP_XBUF_BASE_ADDR + (uart_tx[i] << 2)), 1); > + /* SUART1 TX formatted data base addr */ > + pruss_writel(dev, (u32) &pru_suart_tx_priv->buff_addr, > + (0x0090 + (i * 0x050)), 1); > + > + /* Channel 1 is Rx context information */ > + pru_suart_regs++; > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + 0x3, SUART_CHN_RX); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0xF << SERIALIZER_OFFSET), > + ((0xF & uart_rx[i]) << SERIALIZER_OFFSET)); > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_ctrl_config1, > + (0x3 << SUART_DEFAULT_OVRSMPL_OFFSET), > + (SUART_DEFAULT_OVRSMPL << > + SUART_DEFAULT_OVRSMPL_OFFSET)); > + pruss_rmwl(dev, > + (u32) &pru_suart_regs->ch_config2_txrx_status, > + 0xF, 8); > + > + if ((uart_config[i] & PRU_SUART_HALF_RX_DISABLED) == > + PRU_SUART_HALF_RX_DISABLED) { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_DISABLED << SUART_CHN_OFFSET)); > + } else { > + pruss_rmwl(dev, (u32) > + &pru_suart_regs->ch_config2_txrx_status, > + (0x1 << SUART_CHN_OFFSET), > + (SUART_CHN_ENABLED << SUART_CHN_OFFSET)); > + __raw_writel(MCASP_SRCTL_RX_MODE, > + p_sr_ctl_addr + uart_rx[i]); > + } > + /* RX is active by default, write the dummy received data > + * at PRU RAM addr 0x1FC to avoid memory corruption > + */ > + pruss_rmwl(dev, (u32) &pru_suart_regs->ch_txrx_data, > + 0xFFFF, RX_DEFAULT_DATA_DUMP_ADDR); > + pruss_rmwl(dev, (u32) &pru_suart_regs->reserved1, > + 0xFFFF, 0); > + /* SUART1 RX context base addr */ > + pru_suart_rx_priv = (struct pru_suart_rx_cntx_priv *) > + (PRU0_DATARAM_OFFSET + (0x0C0 + (i * 0x50))); > + pruss_writel(dev, (u32) &pru_suart_rx_priv->asp_rbuf_base, > + (MCASP_RBUF_BASE_ADDR + (uart_rx[i] << 2)), 1); > + pruss_writel(dev, (u32) &pru_suart_rx_priv->asp_rsrctl_base, > + (MCASP_SRCTL_BASE_ADDR + (uart_rx[i] << 2)), 1); > + } > +} > +#endif > + > +static void pru_set_rx_tx_mode(struct device *dev, u32 pru_mode, u32 > pru_num) > +{ > + > + u32 pru_offset; > + > + if (pru_num == PRUSS_NUM0) > + pru_offset = PRU_SUART_PRU0_RX_TX_MODE; > + else if (pru_num == PRUSS_NUM1) > + pru_offset = PRU_SUART_PRU1_RX_TX_MODE; > + else > + return; > + pruss_writeb(dev, pru_offset, (u8 *) &pru_mode, 1); > +} > + > +static void pru_set_delay_count(struct device *dev, u32 pru_freq) > +{ > + u32 delay_cnt; > + > + if (pru_freq == PRU_CLK_228) > + delay_cnt = 5; > + else if (pru_freq == PRU_CLK_186) > + delay_cnt = 5; > + else > + delay_cnt = 3; > + > + /* PRU 0 */ > + pruss_writeb(dev, PRU_SUART_PRU0_DELAY_OFFSET, > + (u8 *) &delay_cnt, 1); > + > + /* PRU 1 */ > + pruss_writeb(dev, PRU_SUART_PRU1_DELAY_OFFSET, > + (u8 *) &delay_cnt, 1); > +} > + > +static s32 suart_set_pru_id(struct device *dev, u32 pru_no) > +{ > + u32 offset; > + u8 reg_val = 0; > + > + if (PRUSS_NUM0 == pru_no) > + offset = PRU_SUART_PRU0_ID_ADDR; > + else if (PRUSS_NUM1 == pru_no) > + offset = PRU_SUART_PRU1_ID_ADDR; > + else > + return -EINVAL; > + > + reg_val = pru_no; > + pruss_writeb(dev, offset, (u8 *) ®_val, 1); > + > + return 0; > +} > + > +/* > + * suart Initialization routine > + */ > +s16 pru_softuart_init(struct device *dev, u32 tx_baud_value, > + u32 rx_baud_value, u32 oversampling, > + u8 *pru_suart_emu_code, u32 fw_size, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + u32 datatowrite[128] = {0}; > + s16 status = 0; > + s16 idx; > + s16 retval; > + > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) && > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) > + return -EINVAL; > + > + suart_iomap.mcasp_io_addr = pruss_ioaddr->mcasp_io_addr; > + suart_iomap.p_fifo_buff_phys_base = > + pruss_ioaddr->p_fifo_buff_phys_base; > + suart_iomap.p_fifo_buff_virt_base = > + pruss_ioaddr->p_fifo_buff_virt_base; > + suart_iomap.pru_clk_freq = pruss_ioaddr->pru_clk_freq; > + /* Configure McASP0 */ > + suart_mcasp_config(tx_baud_value, > + rx_baud_value, oversampling, pruss_ioaddr); > + pruss_enable(dev, PRUSS_NUM0); > + > + if (PRU1_MODE != PRU_MODE_INVALID) > + pruss_enable(dev, PRUSS_NUM1); > + > + /* Reset PRU RAM */ > + pruss_writel(dev, PRU0_DATARAM_OFFSET, datatowrite, > + (PRU0_DATARAM_SIZE / sizeof(int))); > + if (PRU1_MODE != PRU_MODE_INVALID) > + pruss_writel(dev, PRU1_DATARAM_OFFSET, datatowrite, > + (PRU1_DATARAM_SIZE / sizeof(int))); > + > + pruss_load(dev, PRUSS_NUM0, (u32 *)pru_suart_emu_code, > + (fw_size / sizeof(u32))); > + if (PRU1_MODE != PRU_MODE_INVALID) > + pruss_load(dev, PRUSS_NUM1, (u32 *)pru_suart_emu_code, > + (fw_size / sizeof(u32))); > + > + retval = arm_to_pru_intr_init(dev); > + if (-1 == retval) > + return status; > + pru_set_delay_count(dev, pruss_ioaddr->pru_clk_freq); > + suart_set_pru_id(dev, PRUSS_NUM0); > + if (PRU1_MODE != PRU_MODE_INVALID) > + suart_set_pru_id(dev, PRUSS_NUM1); > + > + pru_set_rx_tx_mode(dev, PRU0_MODE, PRUSS_NUM0); > + if (PRU1_MODE != PRU_MODE_INVALID) > + pru_set_rx_tx_mode(dev, PRU1_MODE, PRUSS_NUM1); > + > + pru_set_ram_data(dev, pruss_ioaddr); > + pruss_run(dev, PRUSS_NUM0); > + > + if (PRU1_MODE != PRU_MODE_INVALID) > + pruss_run(dev, PRUSS_NUM1); > + > + /* Initialize uart_statu_table */ > + for (idx = 0; idx < 8; idx++) > + uart_statu_table[idx] = ePRU_SUART_UART_FREE; > + > + return status; > +} > + > +void pru_set_fifo_timeout(struct device *dev, s16 timeout) > +{ > + pruss_writew(dev, PRU_SUART_PRU0_IDLE_TIMEOUT_OFFSET, > + &timeout, 1); > + if (PRU1_MODE != PRU_MODE_INVALID) > + pruss_writew(dev, PRU_SUART_PRU1_IDLE_TIMEOUT_OFFSET, > + &timeout, 1); > +} > + > +void pru_mcasp_deinit(void) > +{ > + suart_mcasp_reset(&suart_iomap); > +} > + > +/* suart Instance open routine */ > +s16 pru_softuart_open(struct suart_handle *h_suart) > +{ > + s16 status = 0; > + u16 uart_num = h_suart->uart_num - 1; > + > + if (uart_statu_table[h_suart->uart_num - 1] == > + ePRU_SUART_UART_IN_USE) { > + status = EUSERS; > + return status; > + } else { > + h_suart->uart_type = uart_config[uart_num]; > + h_suart->uart_tx_channel = uart_tx[uart_num]; > + h_suart->uart_rx_channel = uart_rx[uart_num]; > + h_suart->uart_status = ePRU_SUART_UART_IN_USE; > + uart_statu_table[h_suart->uart_num - 1] = > + ePRU_SUART_UART_IN_USE; > + } > + return status; > +} > + > +/* suart instance close routine */ > +s16 pru_softuart_close(struct suart_handle *h_uart) > +{ > + s16 status = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } else { > + uart_statu_table[h_uart->uart_num - 1] = > + ePRU_SUART_UART_FREE; > + /* Reset the Instance to Invalid */ > + h_uart->uart_num = PRU_SUART_UARTx_INVALID; > + h_uart->uart_status = ePRU_SUART_UART_FREE; > + } > + return status; > +} > + > +static s16 search_chnum(u16 uart_num, u16 *ch_num, u32 *pru_offset, u16 > mode) > +{ > + *ch_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + *ch_num = (uart_num * > + SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + if (uart_num <= 4) { > + *pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + } else { > + *pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + *ch_num -= 8; > + } > + if (mode == 2) > + *ch_num = *ch_num + 1; > + > + } else if ((mode == 1) || (mode == 2)) { > + if (mode == 1) { > + if (PRU0_MODE == PRU_MODE_TX_ONLY) > + *pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + else if (PRU1_MODE == PRU_MODE_TX_ONLY) > + *pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else if (mode == 2) { > + if (PRU0_MODE == PRU_MODE_RX_ONLY) > + *pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + else if (PRU1_MODE == PRU_MODE_RX_ONLY) > + *pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } > + } else { > + return 0; > + } > + > + return 0; > +} > + > +/* > + * suart routine for setting relative baud rate > + */ > +s16 pru_softuart_setbaud(struct device *dev, struct suart_handle *h_uart, > + u16 tx_clk_divisor, u16 rx_clk_divisor) > +{ > + u32 offset; > + u32 pru_offset; > + s16 status = 0; > + u16 ch_num; > + u16 regval = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + /* Set the clock divisor value s32o the McASP */ > + if ((tx_clk_divisor > 385) || (tx_clk_divisor == 0)) > + return -EINVAL; > + if ((rx_clk_divisor > 385) || (rx_clk_divisor == 0)) > + return -EINVAL; > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + if (tx_clk_divisor != 0) { > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= (~0x3FF); > + regval |= tx_clk_divisor; > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + if (PRU0_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + } else if (PRU1_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + ch_num++; > + } else { > + return 0; > + } > + regval = 0; > + if (rx_clk_divisor != 0) { > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= (~0x3FF); > + regval |= tx_clk_divisor; > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + return status; > +} > + > +/* > + * suart routine for setting number of bits per character for a specific > uart > + */ > +s16 pru_softuart_setdatabits(struct device *dev, struct suart_handle > *h_uart, > + u16 tx_data_bits, u16 rx_data_bits) > +{ > + u32 offset; > + u32 pru_offset; > + s16 status = 0; > + u16 ch_num; > + u32 reg_val; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + /* > + * NOTE: > + * The supported data bits are 6,7,8,9,10,11,12 bits per character > + */ > + > + if ((tx_data_bits < ePRU_SUART_DATA_BITS6) > + || (tx_data_bits > ePRU_SUART_DATA_BITS12)) > + return -EINVAL; > + > + if ((rx_data_bits < ePRU_SUART_DATA_BITS6) > + || (rx_data_bits > ePRU_SUART_DATA_BITS12)) > + return -EINVAL; > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + if (tx_data_bits != 0) { > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 1); > + reg_val &= ~(0xF); > + reg_val |= tx_data_bits; > + pruss_writeb(dev, offset, (u8 *) ®_val, 1); > + } > + if (PRU0_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + } else if (PRU1_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + ch_num++; > + } else { > + return 0; > + } > + if (rx_data_bits != 0) { > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 1); > + reg_val &= ~(0xF); > + reg_val |= rx_data_bits; > + pruss_writeb(dev, offset, (u8 *) &rx_data_bits, 1); > + } > + > + return status; > +} > + > +/* > + * suart routine to configure specific uart > + */ > +s16 pru_softuart_setconfig(struct device *dev, struct suart_handle > *h_uart, > + struct suart_config *config_uart) > +{ > + u32 offset; > + u32 pru_offset; > + s16 status = 0; > + u16 ch_num; > + u16 reg_val = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + /* > + * NOTE: > + * Dependent baud rate for the given UART,the value MUST BE LESS THAN OR > + * EQUAL TO 64, preScalarValue <= 64 > + */ > + if ((config_uart->tx_clk_divisor > 384) > + || (config_uart->rx_clk_divisor > 384)) { > + return -EINVAL; > + } > + if ((config_uart->tx_bits_per_char < 8) > + || (config_uart->tx_bits_per_char > 14)) { > + return -EINVAL; > + } > + if ((config_uart->rx_bits_per_char < 8) > + || (config_uart->rx_bits_per_char > 14)) { > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + /* Configuring the Transmit part of the given UART */ > + /* Serializer has been as TX in mcasp config, by writing 1 in bits > + * corresponding to tx serializer in PFUNC regsiter ie already set > + * to GPIO mode PRU code will set then back to MCASP mode once TX > + * request for that serializer is posted.It is required because at this > + * pos32 Mcasp is accessed by both PRU and DSP have lower priority for > + * Mcasp in comparison to PRU and DPS keeps on looping there only > + */ > + /* > + * suart_mcasp_tx_serialzier_set > + * (config_uart->tx_serializer, &suart_iomap); > + */ > + /* Configuring TX serializer */ > + if (config_uart->tx_serializer != PRU_SUART_SERIALIZER_NONE) { > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->tx_serializer << > + PRU_SUART_CH_CTRL_SR_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->tx_clk_divisor << > + PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->tx_bits_per_char << > + PRU_SUART_CH_CONFIG2_BITPERCHAR_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + } > + > + if (PRU0_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + } else if (PRU1_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + ch_num++; > + } else { > + return 0; > + } > + > + /* Configuring the Transmit part of the given UART */ > + if (config_uart->rx_serializer != PRU_SUART_SERIALIZER_NONE) { > + /* Configuring RX serializer */ > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->rx_serializer << > + PRU_SUART_CH_CTRL_SR_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* Configuring RX prescalar value and Oversampling */ > + offset = pru_offset + > + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->rx_clk_divisor << > + PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT) | > + (config_uart->oversampling << > + PRU_SUART_CH_CONFIG1_OVS_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* Configuring RX bits per character value */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) > + + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val = reg_val | (config_uart->rx_bits_per_char << > + PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + } > + return status; > +} > + > +/* > + * suart routine for getting the number of bytes transfered > + */ > +s16 pru_softuart_get_tx_data_len(struct device *dev, > + struct suart_handle *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 ch_num; > + u16 read_value = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) &read_value, 2); > + read_value = ((read_value & PRU_SUART_CH_CONFIG1_DIVISOR_MASK) > + >> PRU_SUART_CH_CONFIG2_DATALEN_SHIFT); > + return read_value; > +} > + > +/* > + * suart routine for getting the number of bytes received > + */ > +s16 pru_softuart_get_rx_data_len(struct device *dev, > + struct suart_handle *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 ch_num; > + u16 read_value = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) &read_value, 2); > + read_value = ((read_value & PRU_SUART_CH_CONFIG1_DIVISOR_MASK) > + >> PRU_SUART_CH_CONFIG2_DATALEN_SHIFT); > + > + return read_value; > +} > + > +/* > + * suart routine to get the configuration information from a specific > uart > + */ > +s16 pru_softuart_getconfig(struct device *dev, > + struct suart_handle *h_uart, > + struct suart_config *config_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 ch_num; > + u16 reg_val = 0; > + s16 status = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + > + /* > + * NOTE: > + * Dependent baud rate for the given UART,the value MUST BE LESS THAN OR > + * EQUAL TO 64, preScalarValue <= 64 > + */ > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + /* Configuring the Transmit part of the given UART */ > + /* Configuring TX serializer */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->tx_serializer = ((reg_val & PRU_SUART_CH_CTRL_SR_MASK) >> > + PRU_SUART_CH_CTRL_SR_SHIFT); > + /* Configuring TX prescalar value */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->tx_clk_divisor = ((reg_val & > + PRU_SUART_CH_CONFIG1_DIVISOR_MASK) >> > + PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + > + /* Configuring TX bits per character value */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->tx_bits_per_char = ((reg_val & > + PRU_SUART_CH_CONFIG1_DIVISOR_MASK) >> > + PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + > + if (PRU0_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + } else if (PRU1_MODE == PRU_MODE_RX_ONLY) { > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + ch_num++; > + } else { > + return 0; > + } > + /* Configuring the Transmit part of the given UART */ > + /* Configuring RX serializer */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->rx_serializer = ((reg_val & PRU_SUART_CH_CTRL_SR_MASK) >> > + PRU_SUART_CH_CTRL_SR_SHIFT); > + > + /* Configuring RX prescalar value and oversampling */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG1_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->rx_clk_divisor = ((reg_val & > + PRU_SUART_CH_CONFIG1_DIVISOR_MASK) > + >> PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + config_uart->oversampling = ((reg_val & > + PRU_SUART_CH_CONFIG1_OVS_MASK) >> > + PRU_SUART_CH_CONFIG1_OVS_SHIFT); > + > + /* Configuring RX bits per character value */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + config_uart->rx_bits_per_char = ((reg_val & > + PRU_SUART_CH_CONFIG1_DIVISOR_MASK) > + >> PRU_SUART_CH_CONFIG1_DIVISOR_SHIFT); > + > + return status; > +} > + > +s32 pru_softuart_pending_tx_request(struct device *dev) > +{ > + u32 offset = 0; > + u32 ISR_value = 0; > + > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + return 0; > + } else if (PRU0_MODE == PRU_MODE_TX_ONLY) { > + /* Read PRU Interrupt Status Register from PRU */ > + offset = (u32) (PRUSS_INTC_STATCLRINT1 & 0xFFFF); > + pruss_readl(dev, offset, (u32 *)&ISR_value, 1); > + if ((ISR_value & 0x1) == 0x1) > + return -EINVAL; > + } else if (PRU1_MODE == PRU_MODE_TX_ONLY) { > + /* Read PRU Interrupt Status Register from PRU */ > + offset = (u32) (PRUSS_INTC_STATCLRINT1 & 0xFFFF); > + pruss_readl(dev, offset, (u32 *)&ISR_value, 1); > + if ((ISR_value & 0x2) == 0x2) > + return -EINVAL; > + } else { > + return 0; > + } > + > + return 0; > +} > + > +/* > + * suart data transmit routine > + */ > +s16 pru_softuart_write(struct device *dev, struct suart_handle *h_uart, > + u32 *pt_tx_data_buf, u16 data_len) > +{ > + u32 offset = 0; > + u32 pru_offset; > + s16 status = 0; > + u16 ch_num; > + u16 reg_val = 0; > + u16 pru_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) > + pru_num = h_uart->uart_num; > + else if (PRU0_MODE == PRU_MODE_TX_ONLY) > + pru_num = 0; > + else if (PRU1_MODE == PRU_MODE_TX_ONLY) > + pru_num = 1; > + else > + return 0; > + > + /* Writing data length to SUART channel register */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val &= ~PRU_SUART_CH_CONFIG2_DATALEN_MASK; > + reg_val = reg_val | (data_len << PRU_SUART_CH_CONFIG2_DATALEN_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* Writing the data pos32er to channel TX data pointer */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXDATA_OFFSET; > + pruss_writeb(dev, offset, (u8 *) pt_tx_data_buf, 4); > + > + /* Service Request to PRU */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val &= ~(PRU_SUART_CH_CTRL_MODE_MASK | > + PRU_SUART_CH_CTRL_SREQ_MASK); > + reg_val |= (PRU_SUART_CH_CTRL_TX_MODE << > + PRU_SUART_CH_CTRL_MODE_SHIFT) | (PRU_SUART_CH_CTRL_SREQ << > + PRU_SUART_CH_CTRL_SREQ_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* generate ARM->PRU event */ > + suart_arm_to_pru_intr(dev, pru_num); > + > + return status; > +} > + > +/* > + * suart data receive routine > + */ > +s16 pru_softuart_read(struct device *dev, struct suart_handle *h_uart, > + u32 *ptDataBuf, u16 data_len) > +{ > + u32 offset = 0; > + u32 pru_offset; > + s16 status = 0; > + u16 ch_num; > + u16 reg_val = 0; > + u16 pru_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* channel starts from 0 and uart instance starts from 1 */ > + ch_num = (h_uart->uart_num * > + SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + pru_num = h_uart->uart_num; > + } else if (PRU0_MODE == PRU_MODE_RX_ONLY) { > + pru_num = 0; > + } else if (PRU1_MODE == PRU_MODE_RX_ONLY) { > + pru_num = 1; > + } else { > + return 0; > + } > + /* Writing data length to SUART channel register */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val &= ~PRU_SUART_CH_CONFIG2_DATALEN_MASK; > + reg_val = reg_val | (data_len << PRU_SUART_CH_CONFIG2_DATALEN_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* Writing the data pos32er to channel RX data pointer */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXDATA_OFFSET; > + pruss_writeb(dev, offset, (u8 *) ptDataBuf, 4); > + > + /* Service Request to PRU */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val &= ~(PRU_SUART_CH_CTRL_MODE_MASK | > + PRU_SUART_CH_CTRL_SREQ_MASK); > + reg_val |= (PRU_SUART_CH_CTRL_RX_MODE << > + PRU_SUART_CH_CTRL_MODE_SHIFT) | (PRU_SUART_CH_CTRL_SREQ << > + PRU_SUART_CH_CTRL_SREQ_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + > + /* enable the timeout s32errupt */ > + suart_intr_setmask(dev, h_uart->uart_num, PRU_RX_INTR, > + CHN_TXRX_IE_MASK_TIMEOUT); > + > + /* generate ARM->PRU event */ > + suart_arm_to_pru_intr(dev, pru_num); > + > + return status; > +} > + > +/* > + * suart routine to read the data from the RX FIFO > + */ > +s16 pru_softuart_read_data(struct device *dev, struct suart_handle > *h_uart, > + u8 *p_data_buffer, s32 max_len, > + u32 *pdata_read) > +{ > + s16 ret_val = 0; > + u8 *psrc_addr = NULL; > + u32 data_read = 0; > + u32 data_len = 0; > + u32 char_len = 0; > + u32 offset = 0; > + u32 pru_offset; > + u16 ch_num; > + u16 status = 0; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + > + /* Get the data pos32er from channel RX data pointer */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXDATA_OFFSET; > + pruss_readb(dev, offset, (u8 *) &psrc_addr, 4); > + >+ /* Reading data length from SUART channel register */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CONFIG2_OFFSET; > + pruss_readb(dev, offset, (u8 *) &data_len, 2); > + > + /* read the character length */ > + char_len = data_len & PRU_SUART_CH_CONFIG2_BITPERCHAR_MASK; > + char_len -= 2; /* remove the START & STOP bit */ > + > + data_len &= PRU_SUART_CH_CONFIG2_DATALEN_MASK; > + data_len = data_len >> PRU_SUART_CH_CONFIG2_DATALEN_SHIFT; > + data_len++; > + > + /* if the character length is greater than 8, then the size doubles */ > + if (char_len > 8) > + data_len *= 2; > + > + /* Check if the time-out had occured. If, yes, then we need to find the > + * number of bytes read from PRU. Else, we need to > + * read the requested bytes > + */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + if (CHN_TXRX_STATUS_TIMEOUT == (status & CHN_TXRX_STATUS_TIMEOUT)) { > + /* determine the number of bytes read s32o the FIFO */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) > + + PRU_SUART_CH_BYTESDONECNTR_OFFSET; > + pruss_readb(dev, offset, (u8 *) &data_read, 1); > + > + /* if the character length is greater than 8, > + then the size doubles */ > + if (char_len > 8) > + data_read *= 2; > + > +/* > + * the data corresponding is loaded in second > + * half during the timeout > + */ > + if (data_read > data_len) { > + data_read -= data_len; > + psrc_addr += data_len; > + } > + > + pru_softuart_clr_rx_fifo(dev, h_uart); > + } else { > + data_read = data_len; > +/* > + * if the bit is set, the data is in the first > + * half of the FIFO else the data is in the second half > + */ > + /* Determine the buffer index by reading FIFO_OddEven flag*/ > + if (status & CHN_TXRX_STATUS_CMPLT) > + psrc_addr += data_len; > + } > + > + /* we should be copying only max len given by the application */ > + if (data_read > max_len) > + data_read = max_len; > + > +/* evaluate the virtual address of the FIFO address > + * based on the physical addr > + */ > + psrc_addr = (u8 *)((u32) psrc_addr - > + (u32) suart_iomap.p_fifo_buff_phys_base + > + (u32) suart_iomap.p_fifo_buff_virt_base); > + > + /* Now we have both the data length and the source address. copy */ > + for (offset = 0; offset < data_read; offset++) > + *p_data_buffer++ = *psrc_addr++; > + *pdata_read = data_read; > + ret_val = 0; > + > + return ret_val; > +} > + > +/* > + * suart routine to disable the receive functionality. > + * This routine stops the PRU from receiving on selected > + * UART and also disables the McASP serializer corresponding > + * to this UART Rx line. > + */ > +s16 pru_softuart_stop_receive(struct device *dev, struct suart_handle > *h_uart) > +{ > + u16 ret_status = 0; > + u32 offset; > + u32 pru_offset; > + u16 ch_num; > + u16 status; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + > + /* read the existing value of status flag */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + > + /* we need to clear the busy bit corresponding to receive channel */ > + status &= ~(CHN_TXRX_STATUS_RDY); > + pruss_writeb(dev, offset, (u8 *) &status, 1); > + > + /* get the serizlizer number being used for this Rx channel */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 2); > + status &= PRU_SUART_CH_CTRL_SR_MASK; > + status = status >> PRU_SUART_CH_CTRL_SR_SHIFT; > + > + /* we need to de-activate the serializer corresponding to this rx */ > + ret_status = suart_asp_serializer_deactivate(status, &suart_iomap); > + > + return ret_status; > +} > + > +/* > + * suart routine to get the tx status for a specific uart > + */ > +s16 pru_softuart_get_tx_status(struct device *dev, struct suart_handle > *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 status = 0; > + u16 ch_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + return status; > +} > + > +s16 pru_softuart_clr_tx_status(struct device *dev, struct suart_handle > *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 status = 0; > + u16 ch_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 1); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + status &= ~(0x2); > + pruss_writeb(dev, offset, (u8 *) &status, 1); > + return status; > +} > + > +/* > + * suart routine to get the rx status for a specific uart > + */ > +s16 pru_softuart_get_rx_status(struct device *dev, struct suart_handle > *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 status = 0; > + u16 ch_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + return status; > +} > + > +static s16 pru_softuart_clr_rx_fifo(struct device *dev, > + struct suart_handle *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 status = 0; > + u16 ch_num; > + u16 reg_val; > + u16 uart_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + uart_num = h_uart->uart_num; > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + if (PRU0_MODE == PRU_MODE_RX_ONLY) > + uart_num = 0; > + else if (PRU1_MODE == PRU_MODE_RX_ONLY) > + uart_num = 1; > + > + /* Reset the number of bytes read into the FIFO */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) > + + PRU_SUART_CH_BYTESDONECNTR_OFFSET; > + pruss_readw(dev, offset, (u16 *) ®_val, 1); > + reg_val &= 0x00; > + pruss_writew(dev, offset, (u16 *) ®_val, 1); > + > + > + /* Service Request to PRU */ > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_CTRL_OFFSET; > + pruss_readb(dev, offset, (u8 *) ®_val, 2); > + reg_val &= ~(PRU_SUART_CH_CTRL_MODE_MASK | PRU_SUART_CH_CTRL_SREQ_MASK); > + reg_val |= (PRU_SUART_CH_CTRL_RX_MODE << PRU_SUART_CH_CTRL_MODE_SHIFT) | > + (PRU_SUART_CH_CTRL_SREQ << PRU_SUART_CH_CTRL_SREQ_SHIFT); > + pruss_writeb(dev, offset, (u8 *) ®_val, 2); > + suart_intr_setmask(dev, h_uart->uart_num, PRU_RX_INTR, > + CHN_TXRX_IE_MASK_TIMEOUT); > + > + /* generate ARM->PRU event */ > + suart_arm_to_pru_intr(dev, uart_num); > + > + return status; > +} > + > +s16 pru_softuart_clr_rx_status(struct device *dev, struct suart_handle > *h_uart) > +{ > + u32 offset; > + u32 pru_offset; > + u16 status = 0; > + u16 ch_num; > + > + if (h_uart == NULL) { > + WARN_ON(1); > + return -EINVAL; > + } > + search_chnum(h_uart->uart_num, &ch_num, &pru_offset, 2); > + > + offset = pru_offset + (ch_num * SUART_NUM_OF_BYTES_PER_CHANNEL) + > + PRU_SUART_CH_TXRXSTATUS_OFFSET; > + pruss_readb(dev, offset, (u8 *) &status, 1); > + status &= ~(0x3C); > + pruss_writeb(dev, offset, (u8 *) &status, 1); > + return status; > +} > + > +/* > + * suart_s32r_status_read: Gets the Global Interrupt status register > + * for the specified SUART. > + * uart_num < 1 to 6 > > + * txrx_flag < Indicates TX or RX s32errupt for the uart > > + */ > +s16 pru_softuart_get_isrstatus(struct device *dev, u16 uart_num, u16 > *txrx_flag) > +{ > + u32 intc_offset; > + u32 ch_num = 0xFF; > + u32 reg_val = 0; > + u32 reg_val2 = 0; > + u32 ISR_value = 0; > + u32 ack_reg_val = 0; > + u32 stat_inx_clr_regoffset = 0; > + > + /* initialize the status & Flag to known value */ > + *txrx_flag = 0; > + > + stat_inx_clr_regoffset = (u32) (PRUSS_INTC_STATIDXCLR & 0xFFFF); > + > + /* Read PRU Interrupt Status Register from PRU */ > + intc_offset = (u32) (PRUSS_INTC_STATCLRINT1 & 0xFFFF); > + > + pruss_readl(dev, intc_offset, (u32 *)&ISR_value, 1); > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* Check if the interrupt occured for Tx */ > + ch_num = uart_num * 2 - 2; > + reg_val2 = PRU_SUART0_TX_EVT_BIT << ((uart_num - 1) * 2); > + if (ISR_value & reg_val2) { > + /* interupt occured for TX */ > + *txrx_flag |= PRU_TX_INTR; > + /* acknowledge the RX interrupt */ > + ack_reg_val = ch_num + PRU_SUART0_TX_EVT; > + pruss_writel(dev, stat_inx_clr_regoffset, > + (u32 *)&ack_reg_val, 1); > + } > + > + /* Check if the interrupt occured for Rx */ > + reg_val2 = PRU_SUART0_RX_EVT_BIT << ((uart_num - 1) * 2); > + pruss_readl(dev, intc_offset, (u32 *)&ISR_value, 1); > + if (ISR_value & reg_val2) { > + /* interupt occured for RX */ > + *txrx_flag |= PRU_RX_INTR; > + ch_num += 1; > + > + /* acknowledge the RX interrupt */ > + ack_reg_val = ch_num + PRU_SUART0_TX_EVT; > + pruss_writel(dev, stat_inx_clr_regoffset, > + (u32 *)&ack_reg_val, 1); > + } > + } else { > + ch_num = uart_num - 1; > + if ((ISR_value & 0x03FC) != 0) { > + reg_val2 = 1 << (uart_num + 1); > + if (ISR_value & reg_val2) { > + /* acknowledge the s32errupt */ > + ack_reg_val = ch_num + PRU_SUART0_TX_EVT; > + pruss_writel(dev, stat_inx_clr_regoffset, > + (u32 *)&ack_reg_val, 1); > + *txrx_flag |= PRU_RX_INTR; > + } > + } > + pruss_readl(dev, intc_offset, (u32 *)&ISR_value, 1); > + if (ISR_value & 0x3FC00) { > + reg_val2 = 1 << (uart_num + 9); > + if (ISR_value & reg_val2) { > + /* acknowledge the s32errupt */ > + ack_reg_val = ch_num + PRU_SUART4_TX_EVT; > + pruss_writel(dev, stat_inx_clr_regoffset, > + (u32 *)&ack_reg_val, 1); > + *txrx_flag |= PRU_TX_INTR; > + } > + } > + } > + return reg_val; > +} > + > +s32 pru_intr_clr_isrstatus(struct device *dev, u16 uart_num, u32 > txrxmode) > +{ > + u32 offset; > + u16 txrx_flag = 0; > + u16 chn_num; > + > + chn_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* channel starts from 0 and uart instance starts from 1 */ > + chn_num = (uart_num * SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + if (uart_num <= 4) { > + /* PRU0 */ > + offset = PRU_SUART_PRU0_ISR_OFFSET + 1; > + } else { > + /* PRU1 */ > + offset = PRU_SUART_PRU1_ISR_OFFSET + 1; > + /* First 8 channel corresponds to PRU0 */ > + chn_num -= 8; > + } > + if (2 == txrxmode) > + chn_num++; > + } else if (PRU0_MODE == txrxmode) { > + offset = PRU_SUART_PRU0_ISR_OFFSET + 1; > + } else if (PRU1_MODE == txrxmode) { > + offset = PRU_SUART_PRU1_ISR_OFFSET + 1; > + } else { > + return 0; > + } > + > + pruss_readb(dev, offset, (u8 *) &txrx_flag, 1); > + txrx_flag &= ~(0x2); > + pruss_writeb(dev, offset, (u8 *) &txrx_flag, 1); > + > + return 0; > +} > + > +s16 suart_arm_to_pru_intr(struct device *dev, u16 uart_num) > +{ > + u32 offset; > + u32 value; > + s16 retval; > + > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + if ((uart_num > 0) && (uart_num <= 4)) { > + /* PRU0 SYS_EVT32 */ > + value = 0x20; > + } else if ((uart_num > 4) && (uart_num <= 8)) { > + /* PRU1 SYS_EVT33 */ > + value = 0x21; > + } else { > + return -EINVAL; > + } > + } > + > + if ((PRU0_MODE == PRU_MODE_RX_ONLY) || (PRU1_MODE == PRU_MODE_RX_ONLY) > + || (PRU0_MODE == PRU_MODE_TX_ONLY) > + || (PRU1_MODE == PRU_MODE_TX_ONLY)) { > + if (uart_num == PRUSS_NUM0) { > + /* PRU0 SYS_EVT32 */ > + value = 0x20; > + } > + > + if (uart_num == PRUSS_NUM1) { > + /* PRU0 SYS_EVT33 */ > + value = 0x21; > + } > + } > + > + offset = (u32) (PRUSS_INTC_STATIDXSET & 0xFFFF); > + retval = pruss_writel(dev, offset, (u32 *)&value, 1); > + if (retval == -1) > + return -1; > + return 0; > +} > + > +static s16 arm_to_pru_intr_init(struct device *dev) > +{ > + u32 value; > + u32 int_offset; > + > + /* Clear all the host interrupts */ > + for (int_offset = 0; int_offset <= PRUSS_INTC_HOSTINTLVL_MAX; > + int_offset++) > + pruss_idx_writel(dev, PRUSS_INTC_HSTINTENIDXCLR, int_offset); > + > + /* Enable the global s32errupt */ > + pruss_rmwl(dev, (u32) (PRUSS_INTC_GLBLEN & 0xFFFF), 0, 1); > + > + /* Enable the Host interrupts for all host channels */ > + for (int_offset = 0; int_offset <= PRUSS_INTC_HOSTINTLVL_MAX; > + int_offset++) > + pruss_rmwl(dev, (u32) (PRUSS_INTC_HSTINTENIDXSET & 0xFFFF), > + 0, int_offset); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_HOSTMAP0 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_HOSTMAP0_CHAN); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_HOSTMAP1 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_HOSTMAP1_CHAN); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_HOSTMAP2 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_HOSTMAP2_CHAN); > + > + /* MAP Channel 0 to SYS_EVT31 */ > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP7 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP7_SYS_EVT31); > + > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* Sets the channels for the system interrupt */ > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP8 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP8_FULL); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP9 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP9_FULL); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP10 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP10_FULL); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP11 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP11_FULL); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP12 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP12_FULL); > + } > + if ((PRU0_MODE == PRU_MODE_RX_ONLY) || (PRU1_MODE == PRU_MODE_RX_ONLY) > + || (PRU0_MODE == PRU_MODE_TX_ONLY) > + || (PRU1_MODE == PRU_MODE_TX_ONLY)) { > + > + /* Sets the channels for the system interrupt */ > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP8 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP8_HALF); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP9 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP9_HALF); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP10 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP10_HALF); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP11 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP11_HALF); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_CHANMAP12 & 0xFFFF), > + PRU_INTC_REGMAP_MASK, PRU_INTC_CHANMAP12_HALF); > + } > + > + /* Clear required set of system events > + * and enable them using indexed register > + */ > + for (int_offset = 0; int_offset < 18; int_offset++) { > + value = 32 + int_offset; > + pruss_idx_writel(dev, PRUSS_INTC_STATIDXCLR, value); > + } > + > + /* enable only the HOST to PRU interrupts and let the PRU to Host events > + * enabled by the separate API on demand basis. > + */ > + pruss_idx_writel(dev, PRUSS_INTC_ENIDXSET, 31); > + pruss_idx_writel(dev, PRUSS_INTC_ENIDXSET, 32); > + pruss_idx_writel(dev, PRUSS_INTC_ENIDXSET, 33); > + pruss_idx_writel(dev, PRUSS_INTC_ENIDXSET, 50); > + pruss_rmwl(dev, (u32) (PRUSS_INTC_GLBLEN & 0xFFFF), 0, 1); > + > + /* Enable the Host interrupts for all host channels */ > + for (int_offset = 0; int_offset <= PRUSS_INTC_HOSTINTLVL_MAX; > + int_offset++) > + pruss_idx_writel(dev, PRUSS_INTC_HSTINTENIDXSET, int_offset); > + > + return 0; > +} > + > +s32 suart_pru_to_host_intr_enable(struct device *dev, u16 uart_num, > + u32 txrxmode, s32 flag) > +{ > + s32 ret_val = 0; > + u32 offset; > + u32 chn_num; > + u32 value; > + s16 retval = 0; > + > + if (uart_num > 8) > + return -EINVAL; > + > + chn_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) || > + (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + chn_num = (uart_num * 2) - 2; > + if (2 == txrxmode) /* Rx mode */ > + chn_num++; > + value = 34 + chn_num; > + } else if ((PRU_MODE_RX_ONLY == txrxmode) > + && (PRU0_MODE == PRU_MODE_RX_ONLY)) > + value = 34 + chn_num; > + else if ((PRU_MODE_RX_ONLY == txrxmode) > + && (PRU1_MODE == PRU_MODE_RX_ONLY)) > + value = 42 + chn_num; > + else if ((PRU_MODE_TX_ONLY == txrxmode) > + && (PRU0_MODE == PRU_MODE_TX_ONLY)) > + value = 34 + chn_num; > + else if ((PRU_MODE_TX_ONLY == txrxmode) > + && (PRU1_MODE == PRU_MODE_TX_ONLY)) > + value = 42 + chn_num; > + else > + return -1; > + > + if (true == flag) { > + offset = (u32) (PRUSS_INTC_ENIDXSET & 0xFFFF); > + retval = pruss_writel(dev, offset, (u32 *)&value, 1); > + if (retval == -1) > + return -1; > + } else { > + offset = (u32) (PRUSS_INTC_ENIDXCLR & 0xFFFF); > + retval = pruss_writel(dev, offset, (u32 *)&value, 1); > + if (retval == -1) > + return -1; > + } > + return ret_val; > +} > + > +s32 suart_intr_setmask(struct device *dev, u16 uart_num, > + u32 txrxmode, u32 rmask) > +{ > + u32 offset; > + u32 pru_offset; > + u32 regval = 0; > + u32 chn_num; > + > + chn_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* channel starts from 0 and uart instance starts from 1 */ > + chn_num = (uart_num * SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + > + if ((uart_num > 0) && (uart_num <= 4)) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if ((uart_num > 4) && (uart_num <= 8)) { > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + chn_num -= 8; > + } else { > + return -EINVAL; > + } > + if (2 == txrxmode) { /* rx mode */ > + chn_num++; > + } > + } else if (PRU0_MODE == txrxmode) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if (PRU1_MODE == txrxmode) { > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else { > + return 0; > + } > + regval = 1 << chn_num; > + if (CHN_TXRX_IE_MASK_CMPLT == (rmask & CHN_TXRX_IE_MASK_CMPLT)) > + pruss_rmww(dev, offset, regval, regval); > + > + if ((rmask & SUART_GBL_INTR_ERR_MASK) == > + SUART_GBL_INTR_ERR_MASK) { > + regval = SUART_GBL_INTR_ERR_MASK; > + pruss_rmww(dev, offset, regval, regval); > + } > + > + offset = pru_offset + > + (chn_num * SUART_NUM_OF_BYTES_PER_CHANNEL) > + + PRU_SUART_CH_CONFIG1_OFFSET; > + /* Framing Error Interrupt Masked */ > + if ((rmask & CHN_TXRX_IE_MASK_FE) == CHN_TXRX_IE_MASK_FE) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_FE); > + regval |= CHN_TXRX_IE_MASK_FE; > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + > + /* Break Indicator Interrupt Masked */ > + if (CHN_TXRX_IE_MASK_BI == (rmask & CHN_TXRX_IE_MASK_BI)) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_BI); > + regval |= CHN_TXRX_IE_MASK_BI; > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + > + /* Timeout error Interrupt Masked */ > + if (CHN_TXRX_IE_MASK_TIMEOUT == > + (rmask & CHN_TXRX_IE_MASK_TIMEOUT)) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_TIMEOUT); > + regval |= CHN_TXRX_IE_MASK_TIMEOUT; > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + return 0; > +} > + > +s32 suart_intr_clrmask(struct device *dev, u16 uart_num, > + u32 txrxmode, u32 rmask) > +{ > + u32 offset; > + u32 pru_offset; > + u16 regval = 0; > + u16 chn_num; > + > + chn_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* channel starts from 0 and uart instance starts from 1 */ > + chn_num = (uart_num * SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + if ((uart_num > 0) && (uart_num <= 4)) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if ((uart_num > 4) && (uart_num <= 8)) { > + /* PRU1 */ > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + /* First 8 channel corresponds to PRU0 */ > + chn_num -= 8; > + } else { > + return -EINVAL; > + } > + if (2 == txrxmode) { /* rx mode */ > + chn_num++; > + } > + } else if (PRU0_MODE == txrxmode) { > + pru_offset = PRU_SUART_PRU0_CH0_OFFSET; > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if (PRU1_MODE == txrxmode) { > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + pru_offset = PRU_SUART_PRU1_CH0_OFFSET; > + } else { > + return 0; > + } > + regval = 1 << chn_num; > + if (CHN_TXRX_IE_MASK_CMPLT == (rmask & CHN_TXRX_IE_MASK_CMPLT)) > + pruss_rmww(dev, offset, regval, 0); > + > + if ((rmask & SUART_GBL_INTR_ERR_MASK) == SUART_GBL_INTR_ERR_MASK) > + pruss_rmww(dev, offset, SUART_GBL_INTR_ERR_MASK, 0); > + > + offset = pru_offset + > + (chn_num * SUART_NUM_OF_BYTES_PER_CHANNEL) > + + PRU_SUART_CH_CONFIG1_OFFSET; > + > + /* Framing Error Interrupt Masked */ > + if ((rmask & CHN_TXRX_IE_MASK_FE) == CHN_TXRX_IE_MASK_FE) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_FE); > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + > + /* Break Indicator Interrupt Masked */ > + if (CHN_TXRX_IE_MASK_BI == (rmask & CHN_TXRX_IE_MASK_BI)) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_BI); > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + > + /* Timeout error Interrupt Masked */ > + if (CHN_TXRX_IE_MASK_TIMEOUT == > + (rmask & CHN_TXRX_IE_MASK_TIMEOUT)) { > + regval = 0; > + pruss_readb(dev, offset, (u8 *) ®val, 2); > + regval &= ~(CHN_TXRX_IE_MASK_TIMEOUT); > + pruss_writeb(dev, offset, (u8 *) ®val, 2); > + } > + > + return 0; > +} > + > +s32 suart_intr_getmask(struct device *dev, u16 uart_num, u32 txrxmode, > + u32 rmask) > +{ > + u16 chn_num; > + u32 offset; > + u16 txrx_flag; > + u16 regval = 1; > + > + chn_num = uart_num - 1; > + if ((PRU0_MODE == PRU_MODE_RX_TX_BOTH) > + || (PRU1_MODE == PRU_MODE_RX_TX_BOTH)) { > + /* channel starts from 0 and uart instance starts from 1 */ > + chn_num = (uart_num * SUART_NUM_OF_CHANNELS_PER_SUART) - 2; > + > + if ((uart_num > 0) && (uart_num <= 4)) { > + > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if ((uart_num > 4) && (uart_num <= 8)) { > + /* PRU1 */ > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + /* First 8 channel corresponds to PRU0 */ > + chn_num -= 8; > + } else { > + return -EINVAL; > + } > + > + if (2 == txrxmode) { /* rx mode */ > + chn_num++; > + } > + } else if (PRU0_MODE == txrxmode) { > + offset = PRU_SUART_PRU0_IMR_OFFSET; > + } else if (PRU1_MODE == txrxmode) { > + offset = PRU_SUART_PRU1_IMR_OFFSET; > + } else { > + return 0; > + } > + regval = regval << chn_num; > + pruss_readb(dev, offset, (u8 *) &txrx_flag, 2); > + txrx_flag &= regval; > + if (0 == rmask) { > + if (txrx_flag == 0) > + return 1; > + } > + if (1 == rmask) { > + if (txrx_flag == regval) > + return 1; > + } > + return 0; > +} > diff --git a/drivers/tty/serial/pruss_suart_utils.c > b/drivers/tty/serial/pruss_suart_utils.c > new file mode 100644 > index 0000000..2bd6983 > --- /dev/null > +++ b/drivers/tty/serial/pruss_suart_utils.c > @@ -0,0 +1,391 @@ > +/* > + * Copyright (C) 2010 Texas Instruments Incorporated > + * Author: Jitendra Kumar > + * > + * This program is free software; you can redistribute it and/or modify > it > + * under the terms of the GNU General Public License as published by the > + * Free Software Foundation version 2. > + * > + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, > + * whether express or implied; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * General Public License for more details. > + */ > + > + > +#include > +#include "pruss_suart.h" > + > +#define SUART_TRX_DIV_CONF_SZ 4 > + > +static s16 suart_mcasp_tx_baud_set(u32 tx_baud_value, > + struct pruss_suart_iomap *pruss_ioaddr); > +static s16 suart_mcasp_rx_baud_set(u32 rx_baud_value, u32 oversampling, > + struct pruss_suart_iomap *pruss_ioaddr); > + > +/* > + * Lookup table for TX baud rate > + * The divisor value is calculated using the formula > + * > + * ACLKX = (AUXCLK)/(CLKXDIV * HCLKXDIV) > + * > + * Where > + * CLKXDIV takes values from 1-32 > + * HCLKXDIV takes values from 1-4096 > + * Here > + * AUXCLK = 24MHz > + */ > +u32 lt_tx_baud_rate[][SUART_TRX_DIV_CONF_SZ] = { > + /*BaudRate, Divisor, CLKXDIV,HCLKXDIV */ > + {300, 80000, 24, 3200}, > + {600, 40000, 15, 2500}, > + {1800, 13333, 10, 1212}, > + {2400, 10000, 4, 2000}, > + {4800, 5000, 1, 2500}, > + {7200, 3333, 0, 3333}, > + {9600, 2500, 0, 2500}, > + {14400, 1666, 0, 1666}, > + {19200, 1250, 0, 1250}, > + {38400, 625, 0, 625}, > + {57600, 416, 0, 416}, > + {115200, 208, 0, 208}, > + {230400, 104, 0, 104} > +}; > + > +/* > + * Lookup table for RX baud rate for 8 bit oversampling > + * The divisor value is calculated using the formula > + * > + * ACLKR = (AUXCLK)/(CLKRDIV * HCLKRDIV) * Oversampling > + * > + * Where > + * CLKRDIV takes values from 1-32 > + * HCLKRDIV takes values from 1-4096 > + * Here > + * AUXCLK = 24MHz > + */ > +u32 lt_rx_8x_baud_rate[][SUART_TRX_DIV_CONF_SZ] = { > +/* BaudRate, Divisor, CLKXDIV, HCLKXDIV */ > + {300, 10000, 4, 2000}, > + {600, 5000, 1, 2500}, > + {1800, 1667, 0, 1667}, > + {2400, 1250, 0, 1250}, > + {7200, 417, 0, 417}, > + {4800, 625, 0, 625}, > + {9600, 312, 0, 312}, > + {14400, 208, 0, 208}, > + {19200, 156, 0, 156}, > + {38400, 78, 0, 78}, > + {57600, 52, 0, 52}, > + {115200, 26, 0, 26}, > + {230400, 13, 0, 13} > +}; > + > +/* > + * Lookup table for RX baud rate for 16 bit oversampling > + * The divisor value is calculated using the formula > + * > + * ACLKR = (AUXCLK)/(CLKRDIV * HCLKRDIV) * Oversampling > + * > + * Where > + * CLKRDIV takes values from 1-32 > + * HCLKRDIV takes values from 1-4096 > + * Here > + * AUXCLK = 24MHz > + */ > +u32 lt_rx_16x_baud_rate[][SUART_TRX_DIV_CONF_SZ] = { > +/*BaudRate, Divisor, CLKXDIV, HCLKXDIV */ > + {300, 5000, 1, 2500}, > + {600, 2500, 0, 2500}, > + {1800, 833, 0, 833}, > + {2400, 625, 0, 625}, > + {4800, 312, 0, 312}, > + {7200, 208, 0, 208}, > + {9600, 156, 0, 156}, > + {14400, 104, 0, 104}, > + {19200, 78, 0, 78}, > + {38400, 39, 0, 39}, > + {57600, 26, 0, 26}, > + {115200, 13, 0, 13}, > + {230400, 6, 0, 6} > +}; > + > +/* > + * McASP configuration routine > + */ > + > +void suart_mcasp_reset(struct pruss_suart_iomap *pruss_ioaddr) > +{ > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *) pruss_ioaddr->mcasp_io_addr; > + /* reset mcasp. */ > + __raw_writel(MCASP_SUART_GBLCTL, &mcasp0_regs->GBLCTL); > + __raw_writel(MCASP_SUART_RGBLCTL, &mcasp0_regs->RGBLCTL); > + __raw_writel(MCASP_SUART_XGBLCTL, &mcasp0_regs->XGBLCTL); > + __raw_writel(MCASP_SUART_XSTAT, &mcasp0_regs->XSTAT); > + __raw_writel(MCASP_SUART_RSTAT, &mcasp0_regs->RSTAT); > +} > + > +void suart_mcasp_config(u32 tx_baud_value, > + u32 rx_baud_value, > + u32 oversampling, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *) pruss_ioaddr->mcasp_io_addr; > + u32 temp_reg; > + > + /* reset mcasp */ > + __raw_writel(MCASP_SUART_GBLCTL, &mcasp0_regs->GBLCTL); > + __raw_writel(MCASP_SUART_RGBLCTL, &mcasp0_regs->RGBLCTL); > + __raw_writel(MCASP_SUART_XGBLCTL, &mcasp0_regs->XGBLCTL); > + > + /* configure receive registers */ > + if ((SUART_8X_OVRSMPL == oversampling) || (0 == oversampling)) { > + __raw_writel(MCASP_SUART_RMASK_8, &mcasp0_regs->RMASK); > + __raw_writel(MCASP_SUART_RFMT_8, &mcasp0_regs->RFMT); > + } > + if (SUART_16X_OVRSMPL == oversampling) { > + __raw_writel(MCASP_SUART_RMASK_16, &mcasp0_regs->RMASK); > + __raw_writel(MCASP_SUART_RFMT_16, &mcasp0_regs->RFMT); > + > + } > + > + __raw_writel(MCASP_SUART_FSRM, &mcasp0_regs->AFSRCTL); > + __raw_writel(MCASP_SUART_CLKRM_CLKRP, &mcasp0_regs->ACLKRCTL); > + __raw_writel(MCASP_SUART_HCLKRP, &mcasp0_regs->AHCLKRCTL); > + suart_mcasp_rx_baud_set(rx_baud_value, oversampling, pruss_ioaddr); > + __raw_writel(MCASP_SUART_RTDMS0, &mcasp0_regs->RTDM); > + __raw_writel(MCASP_SUART_RSYNCERR, &mcasp0_regs->RINTCTL); > + __raw_writel(MCASP_SUART_RMAX_RPS_256, &mcasp0_regs->RCLKCHK); > + > + /* configure transmit registers. */ > + __raw_writel(MCASP_SUART_XMASK_0_31, &mcasp0_regs->XMASK); > + __raw_writel(MCASP_SUART_XBUSEL_XSSZ_16_XPAD_0, &mcasp0_regs->XFMT); > + __raw_writel(MCASP_SUART_FSXM, &mcasp0_regs->AFSXCTL); > + __raw_writel(MCASP_SUART_CLKXM_ASYNC_CLKXP, &mcasp0_regs->ACLKXCTL); > + __raw_writel(MCASP_SUART_HCLKXM, &mcasp0_regs->AHCLKXCTL); > + > + suart_mcasp_tx_baud_set(tx_baud_value, pruss_ioaddr); > + __raw_writel(MCASP_SUART_XTDMS0, &mcasp0_regs->XTDM); > + __raw_writel(MCASP_SUART_XSYNCERR, &mcasp0_regs->XINTCTL); > + __raw_writel(MCASP_SUART_XMAX_XPS_256, &mcasp0_regs->XCLKCHK); > + > + /* Serializer as a transmitter */ > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL0); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL1); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL2); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL3); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL4); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL5); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL6); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL7); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL8); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL9); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL10); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL11); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL12); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL13); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL14); > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL15); > + > + /* Configure all AXR[n] as McASP pins */ > + > + /* > + * Setting all TX MCASP AXR[n] Pin mapped to Even Serializer number > + * (0,2,4,6,8,10,12,14) to GPIO Mode by default. During setting the > + * serializer to TX mode in PRU assembly code, the MCASP AXR[n] Pin > + * would get configured to MCASP mode of operation, > + * before Actual Data Transfer > + */ > + > + /* Setting all TX Pin to GPIO Mode by default */ > + temp_reg = (OMAPL_MCASP_PFUNC_RESETVAL) | > + (1 << PRU_SUART0_CONFIG_TX_SER) | (1 << PRU_SUART1_CONFIG_TX_SER) | > + (1 << PRU_SUART2_CONFIG_TX_SER) | (1 << PRU_SUART3_CONFIG_TX_SER) | > + (1 << PRU_SUART4_CONFIG_TX_SER) | (1 << PRU_SUART5_CONFIG_TX_SER) | > + (1 << PRU_SUART6_CONFIG_TX_SER) | (1 << PRU_SUART7_CONFIG_TX_SER); > + __raw_writel(temp_reg, &mcasp0_regs->PFUNC); > + > + __raw_writel(0xFFF, &mcasp0_regs->PDOUT); > + > + /* config pin function and direction */ > + __raw_writel(0x00000000, &mcasp0_regs->PDIR); > + temp_reg = > + (1 << PRU_SUART0_CONFIG_TX_SER) | (1 << PRU_SUART1_CONFIG_TX_SER) | > + (1 << PRU_SUART2_CONFIG_TX_SER) | (1 << PRU_SUART3_CONFIG_TX_SER) | > + (1 << PRU_SUART4_CONFIG_TX_SER) | (1 << PRU_SUART5_CONFIG_TX_SER) | > + (1 << PRU_SUART6_CONFIG_TX_SER) | (1 << PRU_SUART7_CONFIG_TX_SER) | > + (MCASP_PDIR_VAL); > + __raw_writel(temp_reg, &mcasp0_regs->PDIR); > + > + __raw_writel(MCASP_SUART_DIT_DISABLE, &mcasp0_regs->DITCTL); > + __raw_writel(MCASP_SUART_LOOPBACK_DISABLE, &mcasp0_regs->DLBCTL); > + __raw_writel(MCASP_SUART_AMUTE_DISABLE, &mcasp0_regs->AMUTE); > + > + __raw_writel(MCASP_SUART_XSTAT, &mcasp0_regs->XSTAT); > + __raw_writel(MCASP_SUART_RSTAT, &mcasp0_regs->RSTAT); > +} > + > +void suart_mcasp_tx_serialzier_set(u32 serializer_num, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *) pruss_ioaddr->mcasp_io_addr; > + u32 temp_reg; > + temp_reg = mcasp0_regs->PFUNC | (0x1 << serializer_num); > + __raw_writel(temp_reg, &mcasp0_regs->PFUNC); > +} > + > +/* > + * mcasp TX buard rate setting routine > + */ > +s16 suart_mcasp_tx_baud_set(u32 tx_baud_value, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + u32 clk_div_val; > + u32 loop_cnt; > + s16 status = 0; > + s16 found_val = false; > + > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *) pruss_ioaddr->mcasp_io_addr; > + u32 temp_reg; > + > + /* Search the supported baud rate in the table */ > + for (loop_cnt = 0; loop_cnt < SUART_NUM_OF_BAUDS_SUPPORTED; > + loop_cnt++) { > + if (tx_baud_value == lt_tx_baud_rate[loop_cnt][0]) { > + found_val = true; > + break; > + } > + } > + if (found_val == true) { > + clk_div_val = lt_tx_baud_rate[loop_cnt][2]; > + temp_reg = mcasp0_regs->ACLKXCTL | > + clk_div_val << OMAPL_MCASP_ACLKXCTL_CLKXDIV_SHIFT; > + __raw_writel(temp_reg, &mcasp0_regs->ACLKXCTL); > + clk_div_val = lt_tx_baud_rate[loop_cnt][3]; > + temp_reg = mcasp0_regs->AHCLKXCTL | > + clk_div_val << OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_SHIFT; > + __raw_writel(temp_reg, &mcasp0_regs->AHCLKXCTL); > + } else { > + return -EINVAL ; > + } > + return status; > +} > + > +/* > + * mcasp RX buard rate setting routine > + */ > +s16 suart_mcasp_rx_baud_set(u32 rx_baud_value, > + u32 oversampling, struct pruss_suart_iomap *pruss_ioaddr) > +{ > + u32 clk_div_val; > + u32 loop_cnt; > + s16 status = 0; > + s16 found_val = false; > + > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *) pruss_ioaddr->mcasp_io_addr; > + u32 temp_reg; > + > + if (oversampling == SUART_8X_OVRSMPL) { > + for (loop_cnt = 0; loop_cnt < SUART_NUM_OF_BAUDS_SUPPORTED; > + loop_cnt++) { > + if (rx_baud_value == lt_rx_8x_baud_rate[loop_cnt][0]) { > + clk_div_val = lt_rx_8x_baud_rate[loop_cnt][2]; > + temp_reg = mcasp0_regs->ACLKRCTL | (clk_div_val > + << OMAPL_MCASP_ACLKXCTL_CLKXDIV_SHIFT); > + > + __raw_writel(temp_reg, &mcasp0_regs->ACLKRCTL); > + > + clk_div_val = > + lt_rx_8x_baud_rate[loop_cnt][3] - 1; > + > + temp_reg = mcasp0_regs->AHCLKRCTL | (clk_div_val > + << OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_SHIFT); > + > + __raw_writel(temp_reg, &mcasp0_regs->AHCLKRCTL); > + > + found_val = true; > + break; > + } > + } > + } else if (oversampling == SUART_16X_OVRSMPL) { > + for (loop_cnt = 0; loop_cnt < SUART_NUM_OF_BAUDS_SUPPORTED; > + loop_cnt++) { > + if (rx_baud_value == lt_rx_16x_baud_rate[loop_cnt][0]) { > + clk_div_val = lt_rx_16x_baud_rate[loop_cnt][2]; > + temp_reg = > + mcasp0_regs->ACLKRCTL | (clk_div_val << > + OMAPL_MCASP_ACLKXCTL_CLKXDIV_SHIFT); > + __raw_writel(temp_reg, &mcasp0_regs->ACLKRCTL); > + clk_div_val = lt_rx_16x_baud_rate[loop_cnt][3]; > + temp_reg = > + mcasp0_regs->AHCLKRCTL | (clk_div_val << > + OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_SHIFT); > + __raw_writel(temp_reg, &mcasp0_regs->AHCLKRCTL); > + found_val = true; > + break; > + } > + } > + } else if (oversampling == 0) { > + for (loop_cnt = 0; loop_cnt < SUART_NUM_OF_BAUDS_SUPPORTED; > + loop_cnt++) { > + if (rx_baud_value == lt_tx_baud_rate[loop_cnt][0]) { > + clk_div_val = lt_tx_baud_rate[loop_cnt][2]; > + temp_reg = > + mcasp0_regs->ACLKRCTL | (clk_div_val << > + OMAPL_MCASP_ACLKXCTL_CLKXDIV_SHIFT); > + __raw_writel(temp_reg, &mcasp0_regs->ACLKRCTL); > + clk_div_val = lt_tx_baud_rate[loop_cnt][3]; > + temp_reg = > + mcasp0_regs->AHCLKRCTL | (clk_div_val << > + OMAPL_MCASP_AHCLKXCTL_HCLKXDIV_SHIFT); > + __raw_writel(temp_reg, &mcasp0_regs->AHCLKRCTL); > + found_val = true; > + break; > + } > + } > + } else { > + return -EINVAL ; > + } > + > + if (found_val != true) > + return -EINVAL ; > + > + return status; > +} > + > +/* > + * mcasp buard rate setting routine > + */ > +s16 suart_asp_baud_set(u32 tx_baud_value, u32 rx_baud_value, u32 > oversampling, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + s16 status = 0; > + > + status = suart_mcasp_tx_baud_set(tx_baud_value, pruss_ioaddr); > + status = suart_mcasp_rx_baud_set(rx_baud_value, oversampling, > + pruss_ioaddr); > + > + return status; > +} > + > +/* > + * mcasp deactivate the selected serializer > + */ > +s16 suart_asp_serializer_deactivate(u16 sr_num, > + struct pruss_suart_iomap *pruss_ioaddr) > +{ > + s16 status = 0; > + struct omapl_mcasp_regs_ovly *mcasp0_regs = > + (struct omapl_mcasp_regs_ovly *)pruss_ioaddr->mcasp_io_addr; > + if (sr_num > 15) > + status = -EINVAL; > + else > + __raw_writel(MCASP_SUART_SRCTL_DISMOD, &mcasp0_regs->SRCTL0); > + > + return status; > +} > diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h > index 758c5b0..eae37fe 100644 > --- a/include/linux/serial_core.h > +++ b/include/linux/serial_core.h > @@ -202,6 +202,8 @@ > /* VIA VT8500 SoC */ > #define PORT_VT8500 97 > > +#define PORT_DA8XX_PRU_SUART 98 > + > #ifdef __KERNEL__ > > #include > -- > 1.7.2.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/