Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752190AbaABQSb (ORCPT ); Thu, 2 Jan 2014 11:18:31 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53086 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751386AbaABQS2 (ORCPT ); Thu, 2 Jan 2014 11:18:28 -0500 Date: Thu, 2 Jan 2014 17:18:24 +0100 From: Pavel Machek To: Pali =?iso-8859-1?Q?Roh=E1r?= Cc: Marcel Holtmann , =?utf-8?B?0JjQstCw0LnQu9C+INCU0LjQvNC40YLRgNC+0LI=?= , Gustavo Padovan , Johan Hedberg , linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, Ville Tervo , sre@ring0.de Subject: [PATCH v3] Bluetooth: Add hci_h4p driver Message-ID: <20140102161824.GA8204@amd.pavel.ucw.cz> References: <1379703710-5757-1-git-send-email-pali.rohar@gmail.com> <1727897.LBX8128hIo@izba> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1727897.LBX8128hIo@izba> User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 65726 Lines: 2511 Add hci_h4p bluetooth driver to 3.12. This device is used for example on Nokia N900 cell phone. Signed-off-by: Pali Roh?r Signed-off-by: Pavel Machek --- Changes from v2: Cleanups as suggested by Marcel. Platform data are still used to communicate with board code; N900 is not quite ready for device tree just yet. Power management thread was removed. diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 11a6104..a53e8c7 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -241,5 +241,15 @@ config BT_WILINK core driver to communicate with the BT core of the combo chip. Say Y here to compile support for Texas Instrument's WiLink7 driver - into the kernel or say M to compile it as module. + into the kernel or say M to compile it as module (btwilink). + +config BT_NOKIA_H4P + tristate "HCI driver with H4 Nokia extensions" + depends on BT && ARCH_OMAP + help + Bluetooth HCI driver with H4 extensions. This driver provides + support for H4+ Bluetooth chip with vendor-specific H4 extensions. + + Say Y here to compile support for h4 extended devices into the kernel + or say M to compile it as module (btnokia_h4p). endmenu diff --git a/drivers/bluetooth/Makefile b/drivers/bluetooth/Makefile index 4afae20..a5ed271 100644 --- a/drivers/bluetooth/Makefile +++ b/drivers/bluetooth/Makefile @@ -30,3 +30,8 @@ hci_uart-$(CONFIG_BT_HCIUART_LL) += hci_ll.o hci_uart-$(CONFIG_BT_HCIUART_ATH3K) += hci_ath.o hci_uart-$(CONFIG_BT_HCIUART_3WIRE) += hci_h5.o hci_uart-objs := $(hci_uart-y) + +obj-$(CONFIG_BT_NOKIA_H4P) += btnokia_h4p.o +btnokia_h4p-objs := nokia_core.o nokia_fw.o nokia_uart.o nokia_fw-csr.o \ + nokia_fw-bcm.o nokia_fw-ti1273.o + diff --git a/drivers/bluetooth/hci_h4p.h b/drivers/bluetooth/hci_h4p.h new file mode 100644 index 0000000..fd7a640 --- /dev/null +++ b/drivers/bluetooth/hci_h4p.h @@ -0,0 +1,228 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2005-2008 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#ifndef __DRIVERS_BLUETOOTH_HCI_H4P_H +#define __DRIVERS_BLUETOOTH_HCI_H4P_H + +#include +#include +#include + +#define FW_NAME_TI1271_PRELE "ti1273_prele.bin" +#define FW_NAME_TI1271_LE "ti1273_le.bin" +#define FW_NAME_TI1271 "ti1273.bin" +#define FW_NAME_BCM2048 "bcmfw.bin" +#define FW_NAME_CSR "bc4fw.bin" + +#define UART_SYSC_OMAP_RESET 0x03 +#define UART_SYSS_RESETDONE 0x01 +#define UART_OMAP_SCR_EMPTY_THR 0x08 +#define UART_OMAP_SCR_WAKEUP 0x10 +#define UART_OMAP_SSR_WAKEUP 0x02 +#define UART_OMAP_SSR_TXFULL 0x01 + +#define UART_OMAP_SYSC_IDLEMODE 0x03 +#define UART_OMAP_SYSC_IDLEMASK (3 << UART_OMAP_SYSC_IDLEMODE) + +#define UART_OMAP_SYSC_FORCE_IDLE (0 << UART_OMAP_SYSC_IDLEMODE) +#define UART_OMAP_SYSC_NO_IDLE (1 << UART_OMAP_SYSC_IDLEMODE) +#define UART_OMAP_SYSC_SMART_IDLE (2 << UART_OMAP_SYSC_IDLEMODE) + +#define H4P_TRANSFER_MODE 1 +#define H4P_SCHED_TRANSFER_MODE 2 +#define H4P_ACTIVE_MODE 3 + +struct hci_h4p_info { + struct timer_list lazy_release; + struct hci_dev *hdev; + spinlock_t lock; + + void __iomem *uart_base; + unsigned long uart_phys_base; + int irq; + struct device *dev; + u8 chip_type; + u8 bt_wakeup_gpio; + u8 host_wakeup_gpio; + u8 reset_gpio; + u8 reset_gpio_shared; + u8 bt_sysclk; + u8 man_id; + u8 ver_id; + + struct sk_buff_head fw_queue; + struct sk_buff *alive_cmd_skb; + struct completion init_completion; + struct completion fw_completion; + struct completion test_completion; + int fw_error; + int init_error; + + struct sk_buff_head txq; + + struct sk_buff *rx_skb; + long rx_count; + unsigned long rx_state; + unsigned long garbage_bytes; + + u8 bd_addr[6]; + struct sk_buff_head *fw_q; + + int pm_enabled; + int tx_enabled; + int autorts; + int rx_enabled; + unsigned long pm_flags; + + int tx_clocks_en; + int rx_clocks_en; + spinlock_t clocks_lock; + struct clk *uart_iclk; + struct clk *uart_fclk; + atomic_t clk_users; + u16 dll; + u16 dlh; + u16 ier; + u16 mdr1; + u16 efr; +}; + +struct hci_h4p_radio_hdr { + __u8 evt; + __u8 dlen; +} __attribute__ ((packed)); + +struct hci_h4p_neg_hdr { + __u8 dlen; +} __attribute__ ((packed)); +#define H4P_NEG_HDR_SIZE 1 + +#define H4P_NEG_REQ 0x00 +#define H4P_NEG_ACK 0x20 +#define H4P_NEG_NAK 0x40 + +#define H4P_PROTO_PKT 0x44 +#define H4P_PROTO_BYTE 0x4c + +#define H4P_ID_CSR 0x02 +#define H4P_ID_BCM2048 0x04 +#define H4P_ID_TI1271 0x31 + +struct hci_h4p_neg_cmd { + __u8 ack; + __u16 baud; + __u16 unused1; + __u8 proto; + __u16 sys_clk; + __u16 unused2; +} __attribute__ ((packed)); + +struct hci_h4p_neg_evt { + __u8 ack; + __u16 baud; + __u16 unused1; + __u8 proto; + __u16 sys_clk; + __u16 unused2; + __u8 man_id; + __u8 ver_id; +} __attribute__ ((packed)); + +#define H4P_ALIVE_REQ 0x55 +#define H4P_ALIVE_RESP 0xcc + +struct hci_h4p_alive_hdr { + __u8 dlen; +} __attribute__ ((packed)); +#define H4P_ALIVE_HDR_SIZE 1 + +struct hci_h4p_alive_pkt { + __u8 mid; + __u8 unused; +} __attribute__ ((packed)); + +#define MAX_BAUD_RATE 921600 +#define BC4_MAX_BAUD_RATE 3692300 +#define UART_CLOCK 48000000 +#define BT_INIT_DIVIDER 320 +#define BT_BAUDRATE_DIVIDER 384000000 +#define BT_SYSCLK_DIV 1000 +#define INIT_SPEED 120000 + +#define H4_TYPE_SIZE 1 +#define H4_RADIO_HDR_SIZE 2 + +/* H4+ packet types */ +#define H4_CMD_PKT 0x01 +#define H4_ACL_PKT 0x02 +#define H4_SCO_PKT 0x03 +#define H4_EVT_PKT 0x04 +#define H4_NEG_PKT 0x06 +#define H4_ALIVE_PKT 0x07 +#define H4_RADIO_PKT 0x08 + +/* TX states */ +#define WAIT_FOR_PKT_TYPE 1 +#define WAIT_FOR_HEADER 2 +#define WAIT_FOR_DATA 3 + +struct hci_fw_event { + struct hci_event_hdr hev; + struct hci_ev_cmd_complete cmd; + u8 status; +} __attribute__ ((packed)); + +int hci_h4p_send_alive_packet(struct hci_h4p_info *info); + +void hci_h4p_bcm_parse_fw_event(struct hci_h4p_info *info, + struct sk_buff *skb); +int hci_h4p_bcm_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue); + +void hci_h4p_bc4_parse_fw_event(struct hci_h4p_info *info, + struct sk_buff *skb); +int hci_h4p_bc4_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue); + +void hci_h4p_ti1273_parse_fw_event(struct hci_h4p_info *info, + struct sk_buff *skb); +int hci_h4p_ti1273_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue); + +int hci_h4p_read_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue); +int hci_h4p_send_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue); +void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb); + +void hci_h4p_outb(struct hci_h4p_info *info, unsigned int offset, u8 val); +u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset); +void hci_h4p_set_rts(struct hci_h4p_info *info, int active); +int hci_h4p_wait_for_cts(struct hci_h4p_info *info, int active, int timeout_ms); +void __hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which); +void hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which); +void hci_h4p_change_speed(struct hci_h4p_info *info, unsigned long speed); +int hci_h4p_reset_uart(struct hci_h4p_info *info); +void hci_h4p_init_uart(struct hci_h4p_info *info); +void hci_h4p_enable_tx(struct hci_h4p_info *info); +void hci_h4p_store_regs(struct hci_h4p_info *info); +void hci_h4p_restore_regs(struct hci_h4p_info *info); +void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable); + +#endif /* __DRIVERS_BLUETOOTH_HCI_H4P_H */ diff --git a/drivers/bluetooth/nokia_core.c b/drivers/bluetooth/nokia_core.c new file mode 100644 index 0000000..6a693dc --- /dev/null +++ b/drivers/bluetooth/nokia_core.c @@ -0,0 +1,1339 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2005-2008 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + * Thanks to all the Nokia people that helped with this driver, + * including Ville Tervo and Roger Quadros. + * + * Power saving functionality was removed from this driver to make + * merging easier. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include + +#include "hci_h4p.h" + +/* This should be used in function that cannot release clocks */ +static void hci_h4p_set_clk(struct hci_h4p_info *info, int *clock, int enable) +{ + unsigned long flags; + + spin_lock_irqsave(&info->clocks_lock, flags); + if (enable && !*clock) { + BT_DBG("Enabling %p\n", clock); + clk_prepare_enable(info->uart_fclk); + clk_prepare_enable(info->uart_iclk); + if (atomic_read(&info->clk_users) == 0) + hci_h4p_restore_regs(info); + atomic_inc(&info->clk_users); + } + + if (!enable && *clock) { + BT_DBG("Disabling %p\n", clock); + if (atomic_dec_and_test(&info->clk_users)) + hci_h4p_store_regs(info); + clk_disable_unprepare(info->uart_fclk); + clk_disable_unprepare(info->uart_iclk); + } + + *clock = enable; + spin_unlock_irqrestore(&info->clocks_lock, flags); +} + +static void hci_h4p_lazy_clock_release(unsigned long data) +{ + struct hci_h4p_info *info = (struct hci_h4p_info *)data; + unsigned long flags; + + spin_lock_irqsave(&info->lock, flags); + if (!info->tx_enabled) + hci_h4p_set_clk(info, &info->tx_clocks_en, 0); + spin_unlock_irqrestore(&info->lock, flags); +} + +/* Power management functions */ +void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable) +{ + u8 v; + + v = hci_h4p_inb(info, UART_OMAP_SYSC); + v &= ~(UART_OMAP_SYSC_IDLEMASK); + + if (enable) + v |= UART_OMAP_SYSC_SMART_IDLE; + else + v |= UART_OMAP_SYSC_NO_IDLE; + + hci_h4p_outb(info, UART_OMAP_SYSC, v); +} + +static inline void h4p_schedule_pm(struct hci_h4p_info *info) +{ +} + +static void hci_h4p_disable_tx(struct hci_h4p_info *info) +{ + BT_DBG("\n"); + + if (!info->pm_enabled) + return; + + /* Re-enable smart-idle */ + hci_h4p_smart_idle(info, 1); + + gpio_set_value(info->bt_wakeup_gpio, 0); + mod_timer(&info->lazy_release, jiffies + msecs_to_jiffies(100)); + info->tx_enabled = 0; +} + +void hci_h4p_enable_tx(struct hci_h4p_info *info) +{ + unsigned long flags; + BT_DBG("\n"); + + if (!info->pm_enabled) + return; + + h4p_schedule_pm(info); + + spin_lock_irqsave(&info->lock, flags); + del_timer(&info->lazy_release); + hci_h4p_set_clk(info, &info->tx_clocks_en, 1); + info->tx_enabled = 1; + gpio_set_value(info->bt_wakeup_gpio, 1); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + /* + * Disable smart-idle as UART TX interrupts + * are not wake-up capable + */ + hci_h4p_smart_idle(info, 0); + + spin_unlock_irqrestore(&info->lock, flags); +} + +static void hci_h4p_disable_rx(struct hci_h4p_info *info) +{ + if (!info->pm_enabled) + return; + + info->rx_enabled = 0; + + if (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR) + return; + + if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) + return; + + __hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); + info->autorts = 0; + hci_h4p_set_clk(info, &info->rx_clocks_en, 0); +} + +static void hci_h4p_enable_rx(struct hci_h4p_info *info) +{ + if (!info->pm_enabled) + return; + + h4p_schedule_pm(info); + + hci_h4p_set_clk(info, &info->rx_clocks_en, 1); + info->rx_enabled = 1; + + if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) + return; + + __hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); + info->autorts = 1; +} + +/* Negotiation functions */ +int hci_h4p_send_alive_packet(struct hci_h4p_info *info) +{ + struct hci_h4p_alive_hdr *hdr; + struct hci_h4p_alive_pkt *pkt; + struct sk_buff *skb; + unsigned long flags; + int len; + + BT_DBG("Sending alive packet\n"); + + len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt); + skb = bt_skb_alloc(len, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + memset(skb->data, 0x00, len); + *skb_put(skb, 1) = H4_ALIVE_PKT; + hdr = (struct hci_h4p_alive_hdr *)skb_put(skb, sizeof(*hdr)); + hdr->dlen = sizeof(*pkt); + pkt = (struct hci_h4p_alive_pkt *)skb_put(skb, sizeof(*pkt)); + pkt->mid = H4P_ALIVE_REQ; + + skb_queue_tail(&info->txq, skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); + + BT_DBG("Alive packet sent\n"); + + return 0; +} + +static void hci_h4p_alive_packet(struct hci_h4p_info *info, + struct sk_buff *skb) +{ + struct hci_h4p_alive_hdr *hdr; + struct hci_h4p_alive_pkt *pkt; + + BT_DBG("Received alive packet\n"); + hdr = (struct hci_h4p_alive_hdr *)skb->data; + if (hdr->dlen != sizeof(*pkt)) { + dev_err(info->dev, "Corrupted alive message\n"); + info->init_error = -EIO; + goto finish_alive; + } + + pkt = (struct hci_h4p_alive_pkt *)skb_pull(skb, sizeof(*hdr)); + if (pkt->mid != H4P_ALIVE_RESP) { + dev_err(info->dev, "Could not negotiate hci_h4p settings\n"); + info->init_error = -EINVAL; + } + +finish_alive: + complete(&info->init_completion); + kfree_skb(skb); +} + +static int hci_h4p_send_negotiation(struct hci_h4p_info *info) +{ + struct hci_h4p_neg_cmd *neg_cmd; + struct hci_h4p_neg_hdr *neg_hdr; + struct sk_buff *skb; + unsigned long flags; + int err, len; + u16 sysclk; + + BT_DBG("Sending negotiation..\n"); + + switch (info->bt_sysclk) { + case 1: + sysclk = 12000; + break; + case 2: + sysclk = 38400; + break; + default: + return -EINVAL; + } + + len = sizeof(*neg_cmd) + sizeof(*neg_hdr) + H4_TYPE_SIZE; + skb = bt_skb_alloc(len, GFP_KERNEL); + if (!skb) + return -ENOMEM; + + memset(skb->data, 0x00, len); + *skb_put(skb, 1) = H4_NEG_PKT; + neg_hdr = (struct hci_h4p_neg_hdr *)skb_put(skb, sizeof(*neg_hdr)); + neg_cmd = (struct hci_h4p_neg_cmd *)skb_put(skb, sizeof(*neg_cmd)); + + neg_hdr->dlen = sizeof(*neg_cmd); + neg_cmd->ack = H4P_NEG_REQ; + neg_cmd->baud = cpu_to_le16(BT_BAUDRATE_DIVIDER/MAX_BAUD_RATE); + neg_cmd->proto = H4P_PROTO_BYTE; + neg_cmd->sys_clk = cpu_to_le16(sysclk); + + hci_h4p_change_speed(info, INIT_SPEED); + + hci_h4p_set_rts(info, 1); + info->init_error = 0; + init_completion(&info->init_completion); + skb_queue_tail(&info->txq, skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); + + if (!wait_for_completion_interruptible_timeout(&info->init_completion, + msecs_to_jiffies(1000))) + return -ETIMEDOUT; + + if (info->init_error < 0) + return info->init_error; + + /* Change to operational settings */ + hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); + hci_h4p_set_rts(info, 0); + hci_h4p_change_speed(info, MAX_BAUD_RATE); + + err = hci_h4p_wait_for_cts(info, 1, 100); + if (err < 0) + return err; + + hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); + init_completion(&info->init_completion); + err = hci_h4p_send_alive_packet(info); + + if (err < 0) + return err; + + if (!wait_for_completion_interruptible_timeout(&info->init_completion, + msecs_to_jiffies(1000))) + return -ETIMEDOUT; + + if (info->init_error < 0) + return info->init_error; + + BT_DBG("Negotiation succesful\n"); + return 0; +} + +static void hci_h4p_negotiation_packet(struct hci_h4p_info *info, + struct sk_buff *skb) +{ + struct hci_h4p_neg_hdr *hdr; + struct hci_h4p_neg_evt *evt; + + hdr = (struct hci_h4p_neg_hdr *)skb->data; + if (hdr->dlen != sizeof(*evt)) { + info->init_error = -EIO; + goto finish_neg; + } + + evt = (struct hci_h4p_neg_evt *)skb_pull(skb, sizeof(*hdr)); + + if (evt->ack != H4P_NEG_ACK) { + dev_err(info->dev, "Could not negotiate hci_h4p settings\n"); + info->init_error = -EINVAL; + } + + info->man_id = evt->man_id; + info->ver_id = evt->ver_id; + +finish_neg: + + complete(&info->init_completion); + kfree_skb(skb); +} + +/* H4 packet handling functions */ +static int hci_h4p_get_hdr_len(struct hci_h4p_info *info, u8 pkt_type) +{ + long retval; + + switch (pkt_type) { + case H4_EVT_PKT: + retval = HCI_EVENT_HDR_SIZE; + break; + case H4_ACL_PKT: + retval = HCI_ACL_HDR_SIZE; + break; + case H4_SCO_PKT: + retval = HCI_SCO_HDR_SIZE; + break; + case H4_NEG_PKT: + retval = H4P_NEG_HDR_SIZE; + break; + case H4_ALIVE_PKT: + retval = H4P_ALIVE_HDR_SIZE; + break; + case H4_RADIO_PKT: + retval = H4_RADIO_HDR_SIZE; + break; + default: + dev_err(info->dev, "Unknown H4 packet type 0x%.2x\n", pkt_type); + retval = -1; + break; + } + + return retval; +} + +static unsigned int hci_h4p_get_data_len(struct hci_h4p_info *info, + struct sk_buff *skb) +{ + long retval = -1; + struct hci_acl_hdr *acl_hdr; + struct hci_sco_hdr *sco_hdr; + struct hci_event_hdr *evt_hdr; + struct hci_h4p_neg_hdr *neg_hdr; + struct hci_h4p_alive_hdr *alive_hdr; + struct hci_h4p_radio_hdr *radio_hdr; + + switch (bt_cb(skb)->pkt_type) { + case H4_EVT_PKT: + evt_hdr = (struct hci_event_hdr *)skb->data; + retval = evt_hdr->plen; + break; + case H4_ACL_PKT: + acl_hdr = (struct hci_acl_hdr *)skb->data; + retval = le16_to_cpu(acl_hdr->dlen); + break; + case H4_SCO_PKT: + sco_hdr = (struct hci_sco_hdr *)skb->data; + retval = sco_hdr->dlen; + break; + case H4_RADIO_PKT: + radio_hdr = (struct hci_h4p_radio_hdr *)skb->data; + retval = radio_hdr->dlen; + break; + case H4_NEG_PKT: + neg_hdr = (struct hci_h4p_neg_hdr *)skb->data; + retval = neg_hdr->dlen; + break; + case H4_ALIVE_PKT: + alive_hdr = (struct hci_h4p_alive_hdr *)skb->data; + retval = alive_hdr->dlen; + break; + } + + return retval; +} + +static inline void hci_h4p_recv_frame(struct hci_h4p_info *info, + struct sk_buff *skb) +{ + if (unlikely(!test_bit(HCI_RUNNING, &info->hdev->flags))) { + switch (bt_cb(skb)->pkt_type) { + case H4_NEG_PKT: + hci_h4p_negotiation_packet(info, skb); + info->rx_state = WAIT_FOR_PKT_TYPE; + return; + case H4_ALIVE_PKT: + hci_h4p_alive_packet(info, skb); + info->rx_state = WAIT_FOR_PKT_TYPE; + return; + } + + if (!test_bit(HCI_UP, &info->hdev->flags)) { + BT_DBG("fw_event\n"); + hci_h4p_parse_fw_event(info, skb); + return; + } + } + + hci_recv_frame(skb); + BT_DBG("Frame sent to upper layer\n"); +} + +static inline void hci_h4p_handle_byte(struct hci_h4p_info *info, u8 byte) +{ + switch (info->rx_state) { + case WAIT_FOR_PKT_TYPE: + bt_cb(info->rx_skb)->pkt_type = byte; + info->rx_count = hci_h4p_get_hdr_len(info, byte); + if (info->rx_count < 0) { + info->hdev->stat.err_rx++; + kfree_skb(info->rx_skb); + info->rx_skb = NULL; + } else { + info->rx_state = WAIT_FOR_HEADER; + } + break; + case WAIT_FOR_HEADER: + info->rx_count--; + *skb_put(info->rx_skb, 1) = byte; + if (info->rx_count == 0) { + info->rx_count = hci_h4p_get_data_len(info, + info->rx_skb); + if (info->rx_count > skb_tailroom(info->rx_skb)) { + dev_err(info->dev, "Too long frame.\n"); + info->garbage_bytes = info->rx_count - + skb_tailroom(info->rx_skb); + kfree_skb(info->rx_skb); + info->rx_skb = NULL; + break; + } + info->rx_state = WAIT_FOR_DATA; + + } + break; + case WAIT_FOR_DATA: + info->rx_count--; + *skb_put(info->rx_skb, 1) = byte; + break; + default: + WARN_ON(1); + break; + } + + if (info->rx_count == 0) { + /* H4+ devices should allways send word aligned + * packets */ + if (!(info->rx_skb->len % 2)) + info->garbage_bytes++; + hci_h4p_recv_frame(info, info->rx_skb); + info->rx_skb = NULL; + } +} + +static void hci_h4p_rx_tasklet(unsigned long data) +{ + u8 byte; + struct hci_h4p_info *info = (struct hci_h4p_info *)data; + + BT_DBG("tasklet woke up\n"); + BT_DBG("rx_tasklet woke up\ndata "); + + while (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR) { + byte = hci_h4p_inb(info, UART_RX); + if (info->garbage_bytes) { + info->garbage_bytes--; + continue; + } + if (info->rx_skb == NULL) { + info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, + GFP_ATOMIC | GFP_DMA); + if (!info->rx_skb) { + dev_err(info->dev, + "No memory for new packet\n"); + goto finish_rx; + } + info->rx_state = WAIT_FOR_PKT_TYPE; + info->rx_skb->dev = (void *)info->hdev; + } + info->hdev->stat.byte_rx++; + pr_debug("0x%.2x ", byte); + hci_h4p_handle_byte(info, byte); + } + + if (!info->rx_enabled) { + if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT && + info->autorts) { + __hci_h4p_set_auto_ctsrts(info, 0 , UART_EFR_RTS); + info->autorts = 0; + } + /* Flush posted write to avoid spurious interrupts */ + hci_h4p_inb(info, UART_OMAP_SCR); + hci_h4p_set_clk(info, &info->rx_clocks_en, 0); + } + +finish_rx: + pr_debug("\n"); + BT_DBG("rx_ended\n"); +} + +static void hci_h4p_tx_tasklet(unsigned long data) +{ + unsigned int sent = 0; + struct sk_buff *skb; + struct hci_h4p_info *info = (struct hci_h4p_info *)data; + + BT_DBG("tasklet woke up\n"); + BT_DBG("tx_tasklet woke up\n data "); + + if (info->autorts != info->rx_enabled) { + if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) { + if (info->autorts && !info->rx_enabled) { + __hci_h4p_set_auto_ctsrts(info, 0, + UART_EFR_RTS); + info->autorts = 0; + } + if (!info->autorts && info->rx_enabled) { + __hci_h4p_set_auto_ctsrts(info, 1, + UART_EFR_RTS); + info->autorts = 1; + } + } else { + hci_h4p_outb(info, UART_OMAP_SCR, + hci_h4p_inb(info, UART_OMAP_SCR) | + UART_OMAP_SCR_EMPTY_THR); + goto finish_tx; + } + } + + skb = skb_dequeue(&info->txq); + if (!skb) { + /* No data in buffer */ + BT_DBG("skb ready\n"); + if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) { + hci_h4p_outb(info, UART_IER, + hci_h4p_inb(info, UART_IER) & + ~UART_IER_THRI); + hci_h4p_inb(info, UART_OMAP_SCR); + hci_h4p_disable_tx(info); + return; + } else + hci_h4p_outb(info, UART_OMAP_SCR, + hci_h4p_inb(info, UART_OMAP_SCR) | + UART_OMAP_SCR_EMPTY_THR); + goto finish_tx; + } + + /* Copy data to tx fifo */ + while (!(hci_h4p_inb(info, UART_OMAP_SSR) & UART_OMAP_SSR_TXFULL) && + (sent < skb->len)) { + pr_debug("0x%.2x ", skb->data[sent]); + hci_h4p_outb(info, UART_TX, skb->data[sent]); + sent++; + } + + info->hdev->stat.byte_tx += sent; + pr_debug("\n"); + if (skb->len == sent) { + kfree_skb(skb); + } else { + skb_pull(skb, sent); + skb_queue_head(&info->txq, skb); + } + + hci_h4p_outb(info, UART_OMAP_SCR, hci_h4p_inb(info, UART_OMAP_SCR) & + ~UART_OMAP_SCR_EMPTY_THR); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + +finish_tx: + /* Flush posted write to avoid spurious interrupts */ + hci_h4p_inb(info, UART_OMAP_SCR); + +} + +static irqreturn_t hci_h4p_interrupt(int irq, void *data) +{ + struct hci_h4p_info *info = (struct hci_h4p_info *)data; + u8 iir, msr; + int ret; + + ret = IRQ_NONE; + + iir = hci_h4p_inb(info, UART_IIR); + if (iir & UART_IIR_NO_INT) + return IRQ_HANDLED; + + BT_DBG("In interrupt handler iir 0x%.2x\n", iir); + + iir &= UART_IIR_ID; + + if (iir == UART_IIR_MSI) { + msr = hci_h4p_inb(info, UART_MSR); + ret = IRQ_HANDLED; + } + if (iir == UART_IIR_RLSI) { + hci_h4p_inb(info, UART_RX); + hci_h4p_inb(info, UART_LSR); + ret = IRQ_HANDLED; + } + + if (iir == UART_IIR_RDI) { + hci_h4p_rx_tasklet((unsigned long)data); + ret = IRQ_HANDLED; + } + + if (iir == UART_IIR_THRI) { + hci_h4p_tx_tasklet((unsigned long)data); + ret = IRQ_HANDLED; + } + + return ret; +} + +static irqreturn_t hci_h4p_wakeup_interrupt(int irq, void *dev_inst) +{ + struct hci_h4p_info *info = dev_inst; + int should_wakeup; + struct hci_dev *hdev; + + if (!info->hdev) + return IRQ_HANDLED; + + should_wakeup = gpio_get_value(info->host_wakeup_gpio); + hdev = info->hdev; + + if (!test_bit(HCI_RUNNING, &hdev->flags)) { + if (should_wakeup == 1) + complete_all(&info->test_completion); + + return IRQ_HANDLED; + } + + BT_DBG("gpio interrupt %d\n", should_wakeup); + + /* Check if wee have missed some interrupts */ + if (info->rx_enabled == should_wakeup) + return IRQ_HANDLED; + + if (should_wakeup) + hci_h4p_enable_rx(info); + else + hci_h4p_disable_rx(info); + + return IRQ_HANDLED; +} + +static inline void hci_h4p_set_pm_limits(struct hci_h4p_info *info, bool set) +{ + struct hci_h4p_platform_data *bt_plat_data = info->dev->platform_data; + char *sset = set ? "set" : "clear"; + + if (unlikely(!bt_plat_data || !bt_plat_data->set_pm_limits)) + return; + + if (set != !!test_bit(H4P_ACTIVE_MODE, &info->pm_flags)) { + bt_plat_data->set_pm_limits(info->dev, set); + if (set) + set_bit(H4P_ACTIVE_MODE, &info->pm_flags); + else + clear_bit(H4P_ACTIVE_MODE, &info->pm_flags); + BT_DBG("Change pm constraints to: %s", sset); + return; + } + + BT_DBG("pm constraints remains: %s", sset); +} + +static int h4p_run(void *data) +{ +#define TIMEOUT_MIN msecs_to_jiffies(100) +#define TIMEOUT_MAX msecs_to_jiffies(2000) + struct hci_h4p_info *info = data; + unsigned long last_jiffies = jiffies; + unsigned long timeout = TIMEOUT_MIN; + unsigned long elapsed; + BT_DBG(""); + set_user_nice(current, -10); + + while (!kthread_should_stop()) { + set_current_state(TASK_INTERRUPTIBLE); + if (!test_bit(H4P_SCHED_TRANSFER_MODE, &info->pm_flags)) { + if (timeout != TIMEOUT_MIN) { + BT_DBG("Exit from active mode. Rest. constr."); + hci_h4p_set_pm_limits(info, false); + } + + BT_DBG("No pending events. Sleeping."); + schedule(); + } + + set_bit(H4P_TRANSFER_MODE, &info->pm_flags); + clear_bit(H4P_SCHED_TRANSFER_MODE, &info->pm_flags); + + elapsed = jiffies - last_jiffies; + + BT_DBG("Wake up. %u msec expired since last BT activity.", + jiffies_to_msecs(elapsed)); + BT_DBG("Timeout before calculation = %u", + jiffies_to_msecs(timeout)); + + if (elapsed < TIMEOUT_MIN) { + timeout <<= 1; + } else { + timeout -= elapsed; + } + + if (timeout > TIMEOUT_MAX) + timeout = TIMEOUT_MAX; + if (timeout < TIMEOUT_MIN) + timeout = TIMEOUT_MIN; + + BT_DBG("Timeout after calculation = %u", + jiffies_to_msecs(timeout)); + + /* Sometimes we get couple of HCI command during (e)SCO + connection. Turn ON transfer mode _ONLY_ if there is + still BT activity after 100ms sleep */ + if (timeout == TIMEOUT_MIN) + BT_DBG("Do not enable transfer mode yet"); + else { + hci_h4p_set_pm_limits(info, true); + BT_DBG("Set active mode for %u msec.", + jiffies_to_msecs(timeout)); + } + + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(timeout); + + last_jiffies = jiffies; + clear_bit(H4P_TRANSFER_MODE, &info->pm_flags); + } + + hci_h4p_set_pm_limits(info, false); + + return 0; +} + +static int hci_h4p_reset(struct hci_h4p_info *info) +{ + int err; + + err = hci_h4p_reset_uart(info); + if (err < 0) { + dev_err(info->dev, "Uart reset failed\n"); + return err; + } + hci_h4p_init_uart(info); + hci_h4p_set_rts(info, 0); + + gpio_set_value(info->reset_gpio, 0); + gpio_set_value(info->bt_wakeup_gpio, 1); + msleep(10); + + if (gpio_get_value(info->host_wakeup_gpio) == 1) { + dev_err(info->dev, "host_wakeup_gpio not low\n"); + return -EPROTO; + } + + INIT_COMPLETION(info->test_completion); + gpio_set_value(info->reset_gpio, 1); + + if (!wait_for_completion_interruptible_timeout(&info->test_completion, + msecs_to_jiffies(100))) { + dev_err(info->dev, "wakeup test timed out\n"); + complete_all(&info->test_completion); + return -EPROTO; + } + + err = hci_h4p_wait_for_cts(info, 1, 100); + if (err < 0) { + dev_err(info->dev, "No cts from bt chip\n"); + return err; + } + + hci_h4p_set_rts(info, 1); + + return 0; +} + +/* hci callback functions */ +static int hci_h4p_hci_flush(struct hci_dev *hdev) +{ + struct hci_h4p_info *info = hci_get_drvdata(hdev); + skb_queue_purge(&info->txq); + + return 0; +} + +static int hci_h4p_bt_wakeup_test(struct hci_h4p_info *info) +{ + /* + * Test Sequence: + * Host de-asserts the BT_WAKE_UP line. + * Host polls the UART_CTS line, waiting for it to be de-asserted. + * Host asserts the BT_WAKE_UP line. + * Host polls the UART_CTS line, waiting for it to be asserted. + * Host de-asserts the BT_WAKE_UP line (allow the Bluetooth device to + * sleep). + * Host polls the UART_CTS line, waiting for it to be de-asserted. + */ + int err; + int ret = -ECOMM; + + if (!info) + return -EINVAL; + + /* Disable wakeup interrupts */ + disable_irq(gpio_to_irq(info->host_wakeup_gpio)); + + gpio_set_value(info->bt_wakeup_gpio, 0); + err = hci_h4p_wait_for_cts(info, 0, 100); + if (err) { + dev_warn(info->dev, "bt_wakeup_test: fail: " + "CTS low timed out: %d\n", err); + goto out; + } + + gpio_set_value(info->bt_wakeup_gpio, 1); + err = hci_h4p_wait_for_cts(info, 1, 100); + if (err) { + dev_warn(info->dev, "bt_wakeup_test: fail: " + "CTS high timed out: %d\n", err); + goto out; + } + + gpio_set_value(info->bt_wakeup_gpio, 0); + err = hci_h4p_wait_for_cts(info, 0, 100); + if (err) { + dev_warn(info->dev, "bt_wakeup_test: fail: " + "CTS re-low timed out: %d\n", err); + goto out; + } + + ret = 0; + +out: + + /* Re-enable wakeup interrupts */ + enable_irq(gpio_to_irq(info->host_wakeup_gpio)); + + return ret; +} + +static int hci_h4p_hci_open(struct hci_dev *hdev) +{ + struct hci_h4p_info *info; + int err, retries = 0; + struct sk_buff_head fw_queue; + unsigned long flags; + + info = hci_get_drvdata(hdev); + + if (test_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + /* TI1271 has HW bug and boot up might fail. Retry up to three times */ +again: + + info->rx_enabled = 1; + info->rx_state = WAIT_FOR_PKT_TYPE; + info->rx_count = 0; + info->garbage_bytes = 0; + info->rx_skb = NULL; + info->pm_enabled = 0; + init_completion(&info->fw_completion); + hci_h4p_set_clk(info, &info->tx_clocks_en, 1); + hci_h4p_set_clk(info, &info->rx_clocks_en, 1); + skb_queue_head_init(&fw_queue); + + err = hci_h4p_reset(info); + if (err < 0) + goto err_clean; + + hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_CTS | UART_EFR_RTS); + info->autorts = 1; + + err = hci_h4p_send_negotiation(info); + + err = hci_h4p_read_fw(info, &fw_queue); + if (err < 0) { + dev_err(info->dev, "Cannot read firmware\n"); + goto err_clean; + } + + err = hci_h4p_send_fw(info, &fw_queue); + if (err < 0) { + dev_err(info->dev, "Sending firmware failed.\n"); + goto err_clean; + } + + info->pm_enabled = 1; + + err = hci_h4p_bt_wakeup_test(info); + if (err < 0) { + dev_err(info->dev, "BT wakeup test failed.\n"); + goto err_clean; + } + + spin_lock_irqsave(&info->lock, flags); + info->rx_enabled = gpio_get_value(info->host_wakeup_gpio); + hci_h4p_set_clk(info, &info->rx_clocks_en, info->rx_enabled); + spin_unlock_irqrestore(&info->lock, flags); + + hci_h4p_set_clk(info, &info->tx_clocks_en, 0); + + kfree_skb(info->alive_cmd_skb); + info->alive_cmd_skb = NULL; + set_bit(HCI_RUNNING, &hdev->flags); + + BT_DBG("hci up and running\n"); + return 0; + +err_clean: + hci_h4p_hci_flush(hdev); + hci_h4p_reset_uart(info); + del_timer_sync(&info->lazy_release); + hci_h4p_set_clk(info, &info->tx_clocks_en, 0); + hci_h4p_set_clk(info, &info->rx_clocks_en, 0); + gpio_set_value(info->reset_gpio, 0); + gpio_set_value(info->bt_wakeup_gpio, 0); + skb_queue_purge(&fw_queue); + kfree_skb(info->alive_cmd_skb); + info->alive_cmd_skb = NULL; + kfree_skb(info->rx_skb); + info->rx_skb = NULL; + + if (retries++ < 3) { + dev_err(info->dev, "FW loading try %d fail. Retry.\n", retries); + goto again; + } + + return err; +} + +static int hci_h4p_hci_close(struct hci_dev *hdev) +{ + struct hci_h4p_info *info = hci_get_drvdata(hdev); + + if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) + return 0; + + hci_h4p_hci_flush(hdev); + hci_h4p_set_clk(info, &info->tx_clocks_en, 1); + hci_h4p_set_clk(info, &info->rx_clocks_en, 1); + hci_h4p_reset_uart(info); + del_timer_sync(&info->lazy_release); + hci_h4p_set_clk(info, &info->tx_clocks_en, 0); + hci_h4p_set_clk(info, &info->rx_clocks_en, 0); + gpio_set_value(info->reset_gpio, 0); + gpio_set_value(info->bt_wakeup_gpio, 0); + kfree_skb(info->rx_skb); + + return 0; +} + +static int hci_h4p_hci_send_frame(struct sk_buff *skb) +{ + struct hci_h4p_info *info; + struct hci_dev *hdev = (struct hci_dev *)skb->dev; + int err = 0; + + if (!hdev) { + printk(KERN_WARNING "hci_h4p: Frame for unknown device\n"); + return -ENODEV; + } + + BT_DBG("dev %p, skb %p\n", hdev, skb); + + info = hci_get_drvdata(hdev); + + if (!test_bit(HCI_RUNNING, &hdev->flags)) { + dev_warn(info->dev, "Frame for non-running device\n"); + return -EIO; + } + + switch (bt_cb(skb)->pkt_type) { + case HCI_COMMAND_PKT: + hdev->stat.cmd_tx++; + break; + case HCI_ACLDATA_PKT: + hdev->stat.acl_tx++; + break; + case HCI_SCODATA_PKT: + hdev->stat.sco_tx++; + break; + } + + /* Push frame type to skb */ + *skb_push(skb, 1) = (bt_cb(skb)->pkt_type); + /* We should allways send word aligned data to h4+ devices */ + if (skb->len % 2) { + err = skb_pad(skb, 1); + if (!err) + *skb_put(skb, 1) = 0x00; + } + if (err) + return err; + + skb_queue_tail(&info->txq, skb); + hci_h4p_enable_tx(info); + + return 0; +} + +static int hci_h4p_hci_ioctl(struct hci_dev *hdev, unsigned int cmd, + unsigned long arg) +{ + return -ENOIOCTLCMD; +} + +static ssize_t hci_h4p_store_bdaddr(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct hci_h4p_info *info = dev_get_drvdata(dev); + unsigned int bdaddr[6]; + int ret, i; + + ret = sscanf(buf, "%2x:%2x:%2x:%2x:%2x:%2x\n", + &bdaddr[0], &bdaddr[1], &bdaddr[2], + &bdaddr[3], &bdaddr[4], &bdaddr[5]); + + if (ret != 6) + return -EINVAL; + + for (i = 0; i < 6; i++) + info->bd_addr[i] = bdaddr[i] & 0xff; + + return count; +} + +static ssize_t hci_h4p_show_bdaddr(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct hci_h4p_info *info = dev_get_drvdata(dev); + + return sprintf(buf, "%pMR\n", info->bd_addr); +} + +static DEVICE_ATTR(bdaddr, S_IRUGO | S_IWUSR, hci_h4p_show_bdaddr, + hci_h4p_store_bdaddr); + +static int hci_h4p_sysfs_create_files(struct device *dev) +{ + return device_create_file(dev, &dev_attr_bdaddr); +} + +static void hci_h4p_sysfs_remove_files(struct device *dev) +{ + device_remove_file(dev, &dev_attr_bdaddr); +} + +static int hci_h4p_register_hdev(struct hci_h4p_info *info) +{ + struct hci_dev *hdev; + + /* Initialize and register HCI device */ + + hdev = hci_alloc_dev(); + if (!hdev) { + dev_err(info->dev, "Can't allocate memory for device\n"); + return -ENOMEM; + } + info->hdev = hdev; + + hdev->bus = HCI_UART; + hci_set_drvdata(hdev, info); + + hdev->open = hci_h4p_hci_open; + hdev->close = hci_h4p_hci_close; + hdev->flush = hci_h4p_hci_flush; + hdev->send = hci_h4p_hci_send_frame; + hdev->ioctl = hci_h4p_hci_ioctl; + set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); + + SET_HCIDEV_DEV(hdev, info->dev); + + if (hci_h4p_sysfs_create_files(info->dev) < 0) { + dev_err(info->dev, "failed to create sysfs files\n"); + goto free; + } + + if (hci_register_dev(hdev) >= 0) + return 0; + + dev_err(info->dev, "hci_register failed %s.\n", hdev->name); + hci_h4p_sysfs_remove_files(info->dev); +free: + hci_free_dev(info->hdev); + return -ENODEV; +} + +static int hci_h4p_probe(struct platform_device *pdev) +{ + struct hci_h4p_platform_data *bt_plat_data; + struct hci_h4p_info *info; + int err; + + dev_info(&pdev->dev, "Registering HCI H4P device\n"); + info = kzalloc(sizeof(struct hci_h4p_info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = &pdev->dev; + info->tx_enabled = 1; + info->rx_enabled = 1; + spin_lock_init(&info->lock); + spin_lock_init(&info->clocks_lock); + skb_queue_head_init(&info->txq); + + if (pdev->dev.platform_data == NULL) { + dev_err(&pdev->dev, "Could not get Bluetooth config data\n"); + kfree(info); + return -ENODATA; + } + + bt_plat_data = pdev->dev.platform_data; + info->chip_type = bt_plat_data->chip_type; + info->bt_wakeup_gpio = bt_plat_data->bt_wakeup_gpio; + info->host_wakeup_gpio = bt_plat_data->host_wakeup_gpio; + info->reset_gpio = bt_plat_data->reset_gpio; + info->reset_gpio_shared = bt_plat_data->reset_gpio_shared; + info->bt_sysclk = bt_plat_data->bt_sysclk; + + BT_DBG("RESET gpio: %d\n", info->reset_gpio); + BT_DBG("BTWU gpio: %d\n", info->bt_wakeup_gpio); + BT_DBG("HOSTWU gpio: %d\n", info->host_wakeup_gpio); + BT_DBG("sysclk: %d\n", info->bt_sysclk); + + init_completion(&info->test_completion); + complete_all(&info->test_completion); + + if (!info->reset_gpio_shared) { + err = gpio_request(info->reset_gpio, "bt_reset"); + if (err < 0) { + dev_err(&pdev->dev, "Cannot get GPIO line %d\n", + info->reset_gpio); + goto cleanup_setup; + } + } + + err = gpio_request(info->bt_wakeup_gpio, "bt_wakeup"); + if (err < 0) { + dev_err(info->dev, "Cannot get GPIO line 0x%d", + info->bt_wakeup_gpio); + if (!info->reset_gpio_shared) + gpio_free(info->reset_gpio); + goto cleanup_setup; + } + + err = gpio_request(info->host_wakeup_gpio, "host_wakeup"); + if (err < 0) { + dev_err(info->dev, "Cannot get GPIO line %d", + info->host_wakeup_gpio); + if (!info->reset_gpio_shared) + gpio_free(info->reset_gpio); + gpio_free(info->bt_wakeup_gpio); + goto cleanup_setup; + } + + gpio_direction_output(info->reset_gpio, 0); + gpio_direction_output(info->bt_wakeup_gpio, 0); + gpio_direction_input(info->host_wakeup_gpio); + + info->irq = bt_plat_data->uart_irq; + info->uart_base = ioremap(bt_plat_data->uart_base, SZ_2K); + info->uart_iclk = clk_get(NULL, bt_plat_data->uart_iclk); + info->uart_fclk = clk_get(NULL, bt_plat_data->uart_fclk); + + err = request_irq(info->irq, hci_h4p_interrupt, IRQF_DISABLED, "hci_h4p", + info); + if (err < 0) { + dev_err(info->dev, "hci_h4p: unable to get IRQ %d\n", info->irq); + goto cleanup; + } + + err = request_irq(gpio_to_irq(info->host_wakeup_gpio), + hci_h4p_wakeup_interrupt, IRQF_TRIGGER_FALLING | + IRQF_TRIGGER_RISING | IRQF_DISABLED, + "hci_h4p_wkup", info); + if (err < 0) { + dev_err(info->dev, "hci_h4p: unable to get wakeup IRQ %d\n", + gpio_to_irq(info->host_wakeup_gpio)); + free_irq(info->irq, info); + goto cleanup; + } + + err = irq_set_irq_wake(gpio_to_irq(info->host_wakeup_gpio), 1); + if (err < 0) { + dev_err(info->dev, "hci_h4p: unable to set wakeup for IRQ %d\n", + gpio_to_irq(info->host_wakeup_gpio)); + free_irq(info->irq, info); + free_irq(gpio_to_irq(info->host_wakeup_gpio), info); + goto cleanup; + } + + init_timer_deferrable(&info->lazy_release); + info->lazy_release.function = hci_h4p_lazy_clock_release; + info->lazy_release.data = (unsigned long)info; + hci_h4p_set_clk(info, &info->tx_clocks_en, 1); + err = hci_h4p_reset_uart(info); + if (err < 0) + goto cleanup_irq; + gpio_set_value(info->reset_gpio, 0); + hci_h4p_set_clk(info, &info->tx_clocks_en, 0); + + platform_set_drvdata(pdev, info); + + if (hci_h4p_register_hdev(info) < 0) { + dev_err(info->dev, "failed to register hci_h4p hci device\n"); + goto cleanup_irq; + } + + return 0; + +cleanup_irq: + free_irq(info->irq, (void *)info); + free_irq(gpio_to_irq(info->host_wakeup_gpio), info); +cleanup: + gpio_set_value(info->reset_gpio, 0); + if (!info->reset_gpio_shared) + gpio_free(info->reset_gpio); + gpio_free(info->bt_wakeup_gpio); + gpio_free(info->host_wakeup_gpio); +cleanup_setup: + kfree(info); + return err; +} + +static int hci_h4p_remove(struct platform_device *pdev) +{ + struct hci_h4p_info *info; + + info = platform_get_drvdata(pdev); + + hci_h4p_sysfs_remove_files(info->dev); + hci_h4p_hci_close(info->hdev); + free_irq(gpio_to_irq(info->host_wakeup_gpio), info); + hci_unregister_dev(info->hdev); + hci_free_dev(info->hdev); + if (!info->reset_gpio_shared) + gpio_free(info->reset_gpio); + gpio_free(info->bt_wakeup_gpio); + gpio_free(info->host_wakeup_gpio); + free_irq(info->irq, (void *) info); + kfree(info); + + return 0; +} + +static struct platform_driver hci_h4p_driver = { + .probe = hci_h4p_probe, + .remove = hci_h4p_remove, + .driver = { + .name = "hci_h4p", + }, +}; + +static int __init hci_h4p_init(void) +{ + int err = 0; + + /* Register the driver with LDM */ + err = platform_driver_register(&hci_h4p_driver); + if (err < 0) + printk(KERN_WARNING "failed to register hci_h4p driver\n"); + + return err; +} + +static void __exit hci_h4p_exit(void) +{ + platform_driver_unregister(&hci_h4p_driver); +} + +module_init(hci_h4p_init); +module_exit(hci_h4p_exit); + +MODULE_ALIAS("platform:hci_h4p"); +MODULE_DESCRIPTION("Bluetooth h4 driver with nokia extensions"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ville Tervo"); +MODULE_FIRMWARE(FW_NAME_TI1271_PRELE); +MODULE_FIRMWARE(FW_NAME_TI1271_LE); +MODULE_FIRMWARE(FW_NAME_TI1271); +MODULE_FIRMWARE(FW_NAME_BCM2048); +MODULE_FIRMWARE(FW_NAME_CSR); diff --git a/drivers/bluetooth/nokia_fw-bcm.c b/drivers/bluetooth/nokia_fw-bcm.c new file mode 100644 index 0000000..0cf8535 --- /dev/null +++ b/drivers/bluetooth/nokia_fw-bcm.c @@ -0,0 +1,147 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2005-2008 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include +#include +#include + +#include "hci_h4p.h" + +static int hci_h4p_bcm_set_bdaddr(struct hci_h4p_info *info, struct sk_buff *skb) +{ + int i; + static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf}; + int not_valid; + + not_valid = 1; + for (i = 0; i < 6; i++) { + if (info->bd_addr[i] != 0x00) { + not_valid = 0; + break; + } + } + + if (not_valid) { + dev_info(info->dev, "Valid bluetooth address not found, setting some random\n"); + /* When address is not valid, use some random but Nokia MAC */ + memcpy(info->bd_addr, nokia_oui, 3); + get_random_bytes(info->bd_addr + 3, 3); + } + + for (i = 0; i < 6; i++) + skb->data[9 - i] = info->bd_addr[i]; + + return 0; +} + +void hci_h4p_bcm_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb) +{ + struct sk_buff *fw_skb; + int err; + unsigned long flags; + + if (skb->data[5] != 0x00) { + dev_err(info->dev, "Firmware sending command failed 0x%.2x\n", + skb->data[5]); + info->fw_error = -EPROTO; + } + + kfree_skb(skb); + + fw_skb = skb_dequeue(info->fw_q); + if (fw_skb == NULL || info->fw_error) { + complete(&info->fw_completion); + return; + } + + if (fw_skb->data[1] == 0x01 && fw_skb->data[2] == 0xfc && fw_skb->len >= 10) { + BT_DBG("Setting bluetooth address\n"); + err = hci_h4p_bcm_set_bdaddr(info, fw_skb); + if (err < 0) { + kfree_skb(fw_skb); + info->fw_error = err; + complete(&info->fw_completion); + return; + } + } + + skb_queue_tail(&info->txq, fw_skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); +} + + +int hci_h4p_bcm_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue) +{ + struct sk_buff *skb; + unsigned long flags, time; + + info->fw_error = 0; + + BT_DBG("Sending firmware\n"); + + time = jiffies; + + info->fw_q = fw_queue; + skb = skb_dequeue(fw_queue); + if (!skb) + return -ENODATA; + + BT_DBG("Sending commands\n"); + + /* + * Disable smart-idle as UART TX interrupts + * are not wake-up capable + */ + hci_h4p_smart_idle(info, 0); + + /* Check if this is bd_address packet */ + init_completion(&info->fw_completion); + skb_queue_tail(&info->txq, skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); + + if (!wait_for_completion_timeout(&info->fw_completion, + msecs_to_jiffies(2000))) { + dev_err(info->dev, "No reply to fw command\n"); + return -ETIMEDOUT; + } + + if (info->fw_error) { + dev_err(info->dev, "FW error\n"); + return -EPROTO; + } + + BT_DBG("Firmware sent in %d msecs\n", + jiffies_to_msecs(jiffies-time)); + + hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); + hci_h4p_set_rts(info, 0); + hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE); + hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); + + return 0; +} diff --git a/drivers/bluetooth/nokia_fw-csr.c b/drivers/bluetooth/nokia_fw-csr.c new file mode 100644 index 0000000..886b721 --- /dev/null +++ b/drivers/bluetooth/nokia_fw-csr.c @@ -0,0 +1,150 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2005-2008 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include +#include +#include + +#include "hci_h4p.h" + +void hci_h4p_bc4_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb) +{ + /* Check if this is fw packet */ + if (skb->data[0] != 0xff) { + hci_recv_frame(skb); + return; + } + + if (skb->data[11] || skb->data[12]) { + dev_err(info->dev, "Firmware sending command failed\n"); + info->fw_error = -EPROTO; + } + + kfree_skb(skb); + complete(&info->fw_completion); +} + +int hci_h4p_bc4_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue) +{ + static const u8 nokia_oui[3] = {0x00, 0x19, 0x4F}; + struct sk_buff *skb; + unsigned int offset; + int retries, count, i, not_valid; + unsigned long flags; + + info->fw_error = 0; + + BT_DBG("Sending firmware\n"); + skb = skb_dequeue(fw_queue); + + if (!skb) + return -ENOMSG; + + /* Check if this is bd_address packet */ + if (skb->data[15] == 0x01 && skb->data[16] == 0x00) { + offset = 21; + skb->data[offset + 1] = 0x00; + skb->data[offset + 5] = 0x00; + + not_valid = 1; + for (i = 0; i < 6; i++) { + if (info->bd_addr[i] != 0x00) { + not_valid = 0; + break; + } + } + + if (not_valid) { + dev_info(info->dev, "Valid bluetooth address not found," + " setting some random\n"); + /* When address is not valid, use some random */ + memcpy(info->bd_addr, nokia_oui, 3); + get_random_bytes(info->bd_addr + 3, 3); + } + + skb->data[offset + 7] = info->bd_addr[0]; + skb->data[offset + 6] = info->bd_addr[1]; + skb->data[offset + 4] = info->bd_addr[2]; + skb->data[offset + 0] = info->bd_addr[3]; + skb->data[offset + 3] = info->bd_addr[4]; + skb->data[offset + 2] = info->bd_addr[5]; + } + + for (count = 1; ; count++) { + BT_DBG("Sending firmware command %d\n", count); + init_completion(&info->fw_completion); + skb_queue_tail(&info->txq, skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); + + skb = skb_dequeue(fw_queue); + if (!skb) + break; + + if (!wait_for_completion_timeout(&info->fw_completion, + msecs_to_jiffies(1000))) { + dev_err(info->dev, "No reply to fw command\n"); + return -ETIMEDOUT; + } + + if (info->fw_error) { + dev_err(info->dev, "FW error\n"); + return -EPROTO; + } + }; + + /* Wait for chip warm reset */ + retries = 100; + while ((!skb_queue_empty(&info->txq) || + !(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) && + retries--) { + msleep(10); + } + if (!retries) { + dev_err(info->dev, "Transmitter not empty\n"); + return -ETIMEDOUT; + } + + hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE); + + if (hci_h4p_wait_for_cts(info, 1, 100)) { + dev_err(info->dev, "cts didn't deassert after final speed\n"); + return -ETIMEDOUT; + } + + retries = 100; + do { + init_completion(&info->init_completion); + hci_h4p_send_alive_packet(info); + retries--; + } while (!wait_for_completion_timeout(&info->init_completion, 100) && + retries > 0); + + if (!retries) { + dev_err(info->dev, "No alive reply after speed change\n"); + return -ETIMEDOUT; + } + + return 0; +} diff --git a/drivers/bluetooth/nokia_fw-ti1273.c b/drivers/bluetooth/nokia_fw-ti1273.c new file mode 100644 index 0000000..fd82494 --- /dev/null +++ b/drivers/bluetooth/nokia_fw-ti1273.c @@ -0,0 +1,110 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2009 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include +#include +#include + +#include "hci_h4p.h" + +static struct sk_buff_head *fw_q; + +void hci_h4p_ti1273_parse_fw_event(struct hci_h4p_info *info, + struct sk_buff *skb) +{ + struct sk_buff *fw_skb; + unsigned long flags; + + if (skb->data[5] != 0x00) { + dev_err(info->dev, "Firmware sending command failed 0x%.2x\n", + skb->data[5]); + info->fw_error = -EPROTO; + } + + kfree_skb(skb); + + fw_skb = skb_dequeue(fw_q); + if (fw_skb == NULL || info->fw_error) { + complete(&info->fw_completion); + return; + } + + skb_queue_tail(&info->txq, fw_skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); +} + + +int hci_h4p_ti1273_send_fw(struct hci_h4p_info *info, + struct sk_buff_head *fw_queue) +{ + struct sk_buff *skb; + unsigned long flags, time; + + info->fw_error = 0; + + BT_DBG("Sending firmware\n"); + + time = jiffies; + + fw_q = fw_queue; + skb = skb_dequeue(fw_queue); + if (!skb) + return -ENODATA; + + BT_DBG("Sending commands\n"); + /* Check if this is bd_address packet */ + init_completion(&info->fw_completion); + hci_h4p_smart_idle(info, 0); + skb_queue_tail(&info->txq, skb); + spin_lock_irqsave(&info->lock, flags); + hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | + UART_IER_THRI); + spin_unlock_irqrestore(&info->lock, flags); + + if (!wait_for_completion_timeout(&info->fw_completion, + msecs_to_jiffies(2000))) { + dev_err(info->dev, "No reply to fw command\n"); + return -ETIMEDOUT; + } + + if (info->fw_error) { + dev_err(info->dev, "FW error\n"); + return -EPROTO; + } + + BT_DBG("Firmware sent in %d msecs\n", + jiffies_to_msecs(jiffies-time)); + + hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); + hci_h4p_set_rts(info, 0); + hci_h4p_change_speed(info, BC4_MAX_BAUD_RATE); + if (hci_h4p_wait_for_cts(info, 1, 100)) { + dev_err(info->dev, + "cts didn't go down after final speed change\n"); + return -ETIMEDOUT; + } + hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); + + return 0; +} diff --git a/drivers/bluetooth/nokia_fw.c b/drivers/bluetooth/nokia_fw.c new file mode 100644 index 0000000..f69efd8 --- /dev/null +++ b/drivers/bluetooth/nokia_fw.c @@ -0,0 +1,195 @@ +/* + * This file is part of hci_h4p bluetooth driver + * + * Copyright (C) 2005, 2006 Nokia Corporation. + * + * Contact: Ville Tervo + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include +#include +#include + +#include + +#include "hci_h4p.h" + +static int fw_pos; + +/* Firmware handling */ +static int hci_h4p_open_firmware(struct hci_h4p_info *info, + const struct firmware **fw_entry) +{ + int err; + + fw_pos = 0; + BT_DBG("Opening firmware man_id 0x%.2x ver_id 0x%.2x\n", + info->man_id, info->ver_id); + switch (info->man_id) { + case H4P_ID_TI1271: + switch (info->ver_id) { + case 0xe1: + err = request_firmware(fw_entry, FW_NAME_TI1271_PRELE, + info->dev); + break; + case 0xd1: + case 0xf1: + err = request_firmware(fw_entry, FW_NAME_TI1271_LE, + info->dev); + break; + default: + err = request_firmware(fw_entry, FW_NAME_TI1271, + info->dev); + } + break; + case H4P_ID_CSR: + err = request_firmware(fw_entry, FW_NAME_CSR, info->dev); + break; + case H4P_ID_BCM2048: + err = request_firmware(fw_entry, FW_NAME_BCM2048, info->dev); + break; + default: + dev_err(info->dev, "Invalid chip type\n"); + *fw_entry = NULL; + err = -EINVAL; + } + + return err; +} + +static void hci_h4p_close_firmware(const struct firmware *fw_entry) +{ + release_firmware(fw_entry); +} + +/* Read fw. Return length of the command. If no more commands in + * fw 0 is returned. In error case return value is negative. + */ +static int hci_h4p_read_fw_cmd(struct hci_h4p_info *info, struct sk_buff **skb, + const struct firmware *fw_entry, gfp_t how) +{ + unsigned int cmd_len; + + if (fw_pos >= fw_entry->size) + return 0; + + if (fw_pos + 2 > fw_entry->size) { + dev_err(info->dev, "Corrupted firmware image 1\n"); + return -EMSGSIZE; + } + + cmd_len = fw_entry->data[fw_pos++]; + cmd_len += fw_entry->data[fw_pos++] << 8; + if (cmd_len == 0) + return 0; + + if (fw_pos + cmd_len > fw_entry->size) { + dev_err(info->dev, "Corrupted firmware image 2\n"); + return -EMSGSIZE; + } + + *skb = bt_skb_alloc(cmd_len, how); + if (!*skb) { + dev_err(info->dev, "Cannot reserve memory for buffer\n"); + return -ENOMEM; + } + memcpy(skb_put(*skb, cmd_len), &fw_entry->data[fw_pos], cmd_len); + + fw_pos += cmd_len; + + return (*skb)->len; +} + +int hci_h4p_read_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue) +{ + const struct firmware *fw_entry = NULL; + struct sk_buff *skb = NULL; + int err; + + err = hci_h4p_open_firmware(info, &fw_entry); + if (err < 0 || !fw_entry) + goto err_clean; + + while ((err = hci_h4p_read_fw_cmd(info, &skb, fw_entry, GFP_KERNEL))) { + if (err < 0 || !skb) + goto err_clean; + + skb_queue_tail(fw_queue, skb); + } + + /* Chip detection code does neg and alive stuff + * discard two first skbs */ + skb = skb_dequeue(fw_queue); + if (!skb) { + err = -EMSGSIZE; + goto err_clean; + } + kfree_skb(skb); + skb = skb_dequeue(fw_queue); + if (!skb) { + err = -EMSGSIZE; + goto err_clean; + } + kfree_skb(skb); + +err_clean: + hci_h4p_close_firmware(fw_entry); + return err; +} + +int hci_h4p_send_fw(struct hci_h4p_info *info, struct sk_buff_head *fw_queue) +{ + int err; + + switch (info->man_id) { + case H4P_ID_CSR: + err = hci_h4p_bc4_send_fw(info, fw_queue); + break; + case H4P_ID_TI1271: + err = hci_h4p_ti1273_send_fw(info, fw_queue); + break; + case H4P_ID_BCM2048: + err = hci_h4p_bcm_send_fw(info, fw_queue); + break; + default: + dev_err(info->dev, "Don't know how to send firmware\n"); + err = -EINVAL; + } + + return err; +} + +void hci_h4p_parse_fw_event(struct hci_h4p_info *info, struct sk_buff *skb) +{ + switch (info->man_id) { + case H4P_ID_CSR: + hci_h4p_bc4_parse_fw_event(info, skb); + break; + case H4P_ID_TI1271: + hci_h4p_ti1273_parse_fw_event(info, skb); + break; + case H4P_ID_BCM2048: + hci_h4p_bcm_parse_fw_event(info, skb); + break; + default: + dev_err(info->dev, "Don't know how to parse fw event\n"); + info->fw_error = -EINVAL; + } + + return; +} diff --git a/drivers/bluetooth/nokia_uart.c b/drivers/bluetooth/nokia_uart.c new file mode 100644 index 0000000..c19b8d2 --- /dev/null +++ b/drivers/bluetooth/nokia_uart.c @@ -0,0 +1,199 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2005, 2006 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + +#include +#include +#include + +#include + +#include "hci_h4p.h" + +inline void hci_h4p_outb(struct hci_h4p_info *info, unsigned int offset, u8 val) +{ + __raw_writeb(val, info->uart_base + (offset << 2)); +} + +inline u8 hci_h4p_inb(struct hci_h4p_info *info, unsigned int offset) +{ + return __raw_readb(info->uart_base + (offset << 2)); +} + +void hci_h4p_set_rts(struct hci_h4p_info *info, int active) +{ + u8 b; + + b = hci_h4p_inb(info, UART_MCR); + if (active) + b |= UART_MCR_RTS; + else + b &= ~UART_MCR_RTS; + hci_h4p_outb(info, UART_MCR, b); +} + +int hci_h4p_wait_for_cts(struct hci_h4p_info *info, int active, + int timeout_ms) +{ + unsigned long timeout; + int state; + + timeout = jiffies + msecs_to_jiffies(timeout_ms); + for (;;) { + state = hci_h4p_inb(info, UART_MSR) & UART_MSR_CTS; + if (active) { + if (state) + return 0; + } else { + if (!state) + return 0; + } + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + msleep(1); + } +} + +void __hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which) +{ + u8 lcr, b; + + lcr = hci_h4p_inb(info, UART_LCR); + hci_h4p_outb(info, UART_LCR, 0xbf); + b = hci_h4p_inb(info, UART_EFR); + if (on) + b |= which; + else + b &= ~which; + hci_h4p_outb(info, UART_EFR, b); + hci_h4p_outb(info, UART_LCR, lcr); +} + +void hci_h4p_set_auto_ctsrts(struct hci_h4p_info *info, int on, u8 which) +{ + unsigned long flags; + + spin_lock_irqsave(&info->lock, flags); + __hci_h4p_set_auto_ctsrts(info, on, which); + spin_unlock_irqrestore(&info->lock, flags); +} + +void hci_h4p_change_speed(struct hci_h4p_info *info, unsigned long speed) +{ + unsigned int divisor; + u8 lcr, mdr1; + + BT_DBG("Setting speed %lu\n", speed); + + if (speed >= 460800) { + divisor = UART_CLOCK / 13 / speed; + mdr1 = 3; + } else { + divisor = UART_CLOCK / 16 / speed; + mdr1 = 0; + } + + /* Make sure UART mode is disabled */ + hci_h4p_outb(info, UART_OMAP_MDR1, 7); + + lcr = hci_h4p_inb(info, UART_LCR); + hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB); /* Set DLAB */ + hci_h4p_outb(info, UART_DLL, divisor & 0xff); /* Set speed */ + hci_h4p_outb(info, UART_DLM, divisor >> 8); + hci_h4p_outb(info, UART_LCR, lcr); + + /* Make sure UART mode is enabled */ + hci_h4p_outb(info, UART_OMAP_MDR1, mdr1); +} + +int hci_h4p_reset_uart(struct hci_h4p_info *info) +{ + int count = 0; + + /* Reset the UART */ + hci_h4p_outb(info, UART_OMAP_SYSC, UART_SYSC_OMAP_RESET); + while (!(hci_h4p_inb(info, UART_OMAP_SYSS) & UART_SYSS_RESETDONE)) { + if (count++ > 100) { + dev_err(info->dev, "hci_h4p: UART reset timeout\n"); + return -ENODEV; + } + udelay(1); + } + + return 0; +} + +void hci_h4p_store_regs(struct hci_h4p_info *info) +{ + u16 lcr = 0; + + lcr = hci_h4p_inb(info, UART_LCR); + hci_h4p_outb(info, UART_LCR, 0xBF); + info->dll = hci_h4p_inb(info, UART_DLL); + info->dlh = hci_h4p_inb(info, UART_DLM); + info->efr = hci_h4p_inb(info, UART_EFR); + hci_h4p_outb(info, UART_LCR, lcr); + info->mdr1 = hci_h4p_inb(info, UART_OMAP_MDR1); + info->ier = hci_h4p_inb(info, UART_IER); +} + +void hci_h4p_restore_regs(struct hci_h4p_info *info) +{ + u16 lcr = 0; + + hci_h4p_init_uart(info); + + hci_h4p_outb(info, UART_OMAP_MDR1, 7); + lcr = hci_h4p_inb(info, UART_LCR); + hci_h4p_outb(info, UART_LCR, 0xBF); + hci_h4p_outb(info, UART_DLL, info->dll); /* Set speed */ + hci_h4p_outb(info, UART_DLM, info->dlh); + hci_h4p_outb(info, UART_EFR, info->efr); + hci_h4p_outb(info, UART_LCR, lcr); + hci_h4p_outb(info, UART_OMAP_MDR1, info->mdr1); + hci_h4p_outb(info, UART_IER, info->ier); +} + +void hci_h4p_init_uart(struct hci_h4p_info *info) +{ + u8 mcr, efr; + + /* Enable and setup FIFO */ + hci_h4p_outb(info, UART_OMAP_MDR1, 0x00); + + hci_h4p_outb(info, UART_LCR, 0xbf); + efr = hci_h4p_inb(info, UART_EFR); + hci_h4p_outb(info, UART_EFR, UART_EFR_ECB); + hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB); + mcr = hci_h4p_inb(info, UART_MCR); + hci_h4p_outb(info, UART_MCR, UART_MCR_TCRTLR); + hci_h4p_outb(info, UART_FCR, UART_FCR_ENABLE_FIFO | + UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | + (3 << 6) | (0 << 4)); + hci_h4p_outb(info, UART_LCR, 0xbf); + hci_h4p_outb(info, UART_TI752_TLR, 0xed); + hci_h4p_outb(info, UART_TI752_TCR, 0xef); + hci_h4p_outb(info, UART_EFR, efr); + hci_h4p_outb(info, UART_LCR, UART_LCR_DLAB); + hci_h4p_outb(info, UART_MCR, 0x00); + hci_h4p_outb(info, UART_LCR, UART_LCR_WLEN8); + hci_h4p_outb(info, UART_IER, UART_IER_RDI); + hci_h4p_outb(info, UART_OMAP_SYSC, (1 << 0) | (1 << 2) | (2 << 3)); +} diff --git a/include/linux/bluetooth/hci_h4p.h b/include/linux/bluetooth/hci_h4p.h new file mode 100644 index 0000000..30d169d --- /dev/null +++ b/include/linux/bluetooth/hci_h4p.h @@ -0,0 +1,38 @@ +/* + * This file is part of Nokia H4P bluetooth driver + * + * Copyright (C) 2010 Nokia Corporation. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + * + */ + + +/** + * struct hci_h4p_platform data - hci_h4p Platform data structure + */ +struct hci_h4p_platform_data { + int chip_type; + int bt_sysclk; + unsigned int bt_wakeup_gpio; + unsigned int host_wakeup_gpio; + unsigned int reset_gpio; + int reset_gpio_shared; + unsigned int uart_irq; + phys_addr_t uart_base; + const char *uart_iclk; + const char *uart_fclk; + void (*set_pm_limits)(struct device *dev, bool set); +}; -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- 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/