Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764676AbXEWJ2s (ORCPT ); Wed, 23 May 2007 05:28:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758006AbXEWJ2h (ORCPT ); Wed, 23 May 2007 05:28:37 -0400 Received: from nwd2mail11.analog.com ([137.71.25.57]:14812 "EHLO nwd2mail11.analog.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757432AbXEWJ2e (ORCPT ); Wed, 23 May 2007 05:28:34 -0400 X-IronPort-AV: i="4.14,569,1170651600"; d="scan'208"; a="30725188:sNHT33963741" Subject: [PATCH] Blackfin ethernet driver: on chip ethernet MAC controller driver From: Bryan Wu Reply-To: bryan.wu@analog.com To: Jeff Garzik , LKML , netdev@vger.kernel.org, torvalds@linux-foundation.org, Andrew Morton Content-Type: text/plain Content-Transfer-Encoding: 7bit Organization: Analog Devices, Inc. Date: Wed, 23 May 2007 17:28:52 +0800 Message-Id: <1179912533.10328.26.camel@roc-desktop> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 34417 Lines: 1223 From: "Wu, Bryan" This patch implements the driver necessary use the Analog Devices Blackfin processor's on-chip ethernet MAC controller. Signed-off-by: Bryan Wu Cc: Jeff Garzik Signed-off-by: Andrew Morton --- drivers/net/Kconfig | 44 + drivers/net/Makefile | 1 drivers/net/bfin_mac.c | 981 +++++++++++++++++++++++++++++++++++++++ drivers/net/bfin_mac.h | 147 +++++ 4 files changed, 1173 insertions(+) diff -puN drivers/net/Kconfig~blackfin-on-chip-ethernet-mac-controller-driver drivers/net/Kconfig --- a/drivers/net/Kconfig~blackfin-on-chip-ethernet-mac-controller-driver +++ a/drivers/net/Kconfig @@ -836,6 +836,50 @@ config SMC91X module, say M here and read as well as . +config BFIN_MAC + tristate "Blackfin 536/537 on-chip mac support" + depends on NET_ETHERNET && (BF537 || BF536) && (!BF537_PORT_H) + select CRC32 + select BFIN_MAC_USE_L1 if DMA_UNCACHED_NONE + help + This is the driver for blackfin on-chip mac device. Say Y if you want it + compiled into the kernel. This driver is also available as a module + ( = code which can be inserted in and removed from the running kernel + whenever you want). The module will be called bfin_mac. + +config BFIN_MAC_USE_L1 + bool "Use L1 memory for rx/tx packets" + depends on BFIN_MAC && BF537 + default y + help + To get maximum network performace, you should use L1 memory as rx/tx buffers. + Say N here if you want to reserve L1 memory for other uses. + +config BFIN_TX_DESC_NUM + int "Number of transmit buffer packets" + depends on BFIN_MAC + range 6 10 if BFIN_MAC_USE_L1 + range 10 100 + default "10" + help + Set the number of buffer packets used in driver. + +config BFIN_RX_DESC_NUM + int "Number of receive buffer packets" + depends on BFIN_MAC + range 20 100 if BFIN_MAC_USE_L1 + range 20 800 + default "20" + help + Set the number of buffer packets used in driver. + +config BFIN_MAC_RMII + bool "RMII PHY Interface (EXPERIMENTAL)" + depends on BFIN_MAC && EXPERIMENTAL + default n + help + Use Reduced PHY MII Interface + config SMC9194 tristate "SMC 9194 support" depends on NET_VENDOR_SMC && (ISA || MAC && BROKEN) diff -puN drivers/net/Makefile~blackfin-on-chip-ethernet-mac-controller-driver drivers/net/Makefile --- a/drivers/net/Makefile~blackfin-on-chip-ethernet-mac-controller-driver +++ a/drivers/net/Makefile @@ -194,6 +194,7 @@ obj-$(CONFIG_S2IO) += s2io.o obj-$(CONFIG_MYRI10GE) += myri10ge/ obj-$(CONFIG_SMC91X) += smc91x.o obj-$(CONFIG_SMC911X) += smc911x.o +obj-$(CONFIG_BFIN_MAC) += bfin_mac.o obj-$(CONFIG_DM9000) += dm9000.o obj-$(CONFIG_FEC_8XX) += fec_8xx/ obj-$(CONFIG_PASEMI_MAC) += pasemi_mac.o diff -puN /dev/null drivers/net/bfin_mac.c --- /dev/null +++ a/drivers/net/bfin_mac.c @@ -0,0 +1,981 @@ +/* + * File: drivers/net/bfin_mac.c + * Based on: + * Author: Luke Yang + * + * Created: + * Description: + * + * Modified: + * Copyright 2004-2006 Analog Devices Inc. + * + * Bugs: Enter bugs at http://blackfin.uclinux.org/ + * + * 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 ; either version 2, or (at your option) + * any later version. + * + * 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 ; see the file COPYING. + * If not, write to the Free Software Foundation, + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include +#include + +#include +#include +#include + +#include "bfin_mac.h" + +#define CARDNAME "bfin_mac" + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Luke Yang"); +MODULE_DESCRIPTION("Blackfin MAC Driver"); + +#if defined(CONFIG_BFIN_MAC_USE_L1) +# define bfin_mac_alloc(dma_handle, size) l1_data_sram_zalloc(size) +# define bfin_mac_free(dma_handle, ptr) l1_data_sram_free(ptr) +#else +# define bfin_mac_alloc(dma_handle, size) dma_alloc_coherent(NULL, size, dma_handle, GFP_DMA) +# define bfin_mac_free(dma_handle, ptr) dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle) +#endif + +#define PKT_BUF_SZ 1580 + +static void desc_list_free(void); + +/* pointers to maintain transmit list */ +static struct net_dma_desc_tx *tx_list_head; +static struct net_dma_desc_tx *tx_list_tail; +static struct net_dma_desc_rx *rx_list_head; +static struct net_dma_desc_rx *rx_list_tail; +static struct net_dma_desc_rx *current_rx_ptr; +static struct net_dma_desc_tx *current_tx_ptr; +static struct net_dma_desc_tx *tx_desc; +static struct net_dma_desc_rx *rx_desc; + +static int desc_list_init(void) +{ + struct net_dma_desc_tx *tmp_desc_tx; + struct net_dma_desc_rx *tmp_desc_rx; + int i; + struct sk_buff *new_skb; +#if !defined(CONFIG_BFIN_MAC_USE_L1) + dma_addr_t dma_handle; +#endif + + tx_desc = + bfin_mac_alloc(&dma_handle, + sizeof(struct net_dma_desc_tx) * + CONFIG_BFIN_TX_DESC_NUM); + if (tx_desc == NULL) + goto init_error; + + rx_desc = + bfin_mac_alloc(&dma_handle, + sizeof(struct net_dma_desc_rx) * + CONFIG_BFIN_RX_DESC_NUM); + if (rx_desc == NULL) + goto init_error; + + /* init tx_list */ + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { + + tmp_desc_tx = tx_desc + i; + + if (i == 0) { + tx_list_head = tmp_desc_tx; + tx_list_tail = tmp_desc_tx; + } + + tmp_desc_tx->desc_a.start_addr = + (unsigned long)tmp_desc_tx->packet; + tmp_desc_tx->desc_a.x_count = 0; + tmp_desc_tx->desc_a.config.b_DMA_EN = 0; /* disabled */ + tmp_desc_tx->desc_a.config.b_WNR = 0; /* read from memory */ + tmp_desc_tx->desc_a.config.b_WDSIZE = 2; /* wordsize is 32 bits */ + tmp_desc_tx->desc_a.config.b_NDSIZE = 6; /* 6 half words is desc size. */ + tmp_desc_tx->desc_a.config.b_FLOW = 7; /* large desc flow */ + tmp_desc_tx->desc_a.next_dma_desc = &(tmp_desc_tx->desc_b); + + tmp_desc_tx->desc_b.start_addr = + (unsigned long)(&(tmp_desc_tx->status)); + tmp_desc_tx->desc_b.x_count = 0; + tmp_desc_tx->desc_b.config.b_DMA_EN = 1; /* enabled */ + tmp_desc_tx->desc_b.config.b_WNR = 1; /* write to memory */ + tmp_desc_tx->desc_b.config.b_WDSIZE = 2; /* wordsize is 32 bits */ + tmp_desc_tx->desc_b.config.b_DI_EN = 0; /* disable interrupt */ + tmp_desc_tx->desc_b.config.b_NDSIZE = 6; + tmp_desc_tx->desc_b.config.b_FLOW = 7; /* stop mode */ + tmp_desc_tx->skb = NULL; + tx_list_tail->desc_b.next_dma_desc = &(tmp_desc_tx->desc_a); + tx_list_tail->next = tmp_desc_tx; + + tx_list_tail = tmp_desc_tx; + } + tx_list_tail->next = tx_list_head; /* tx_list is a circle */ + tx_list_tail->desc_b.next_dma_desc = &(tx_list_head->desc_a); + current_tx_ptr = tx_list_head; + + /* init rx_list */ + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { + + tmp_desc_rx = rx_desc + i; + + if (i == 0) { + rx_list_head = tmp_desc_rx; + rx_list_tail = tmp_desc_rx; + } + + /* allocat a new skb for next time receive */ + new_skb = dev_alloc_skb(PKT_BUF_SZ + 2); + if (!new_skb) { + printk(KERN_NOTICE CARDNAME + ": init: low on mem - packet dropped\n"); + goto init_error; + } + skb_reserve(new_skb, 2); + tmp_desc_rx->skb = new_skb; + /* since RXDWA is enabled */ + tmp_desc_rx->desc_a.start_addr = + (unsigned long)new_skb->data - 2; + tmp_desc_rx->desc_a.x_count = 0; + tmp_desc_rx->desc_a.config.b_DMA_EN = 1; /* enabled */ + tmp_desc_rx->desc_a.config.b_WNR = 1; /* Write to memory */ + tmp_desc_rx->desc_a.config.b_WDSIZE = 2; /* wordsize is 32 bits */ + tmp_desc_rx->desc_a.config.b_NDSIZE = 6; /* 6 half words is desc size. */ + tmp_desc_rx->desc_a.config.b_FLOW = 7; /* large desc flow */ + tmp_desc_rx->desc_a.next_dma_desc = &(tmp_desc_rx->desc_b); + + tmp_desc_rx->desc_b.start_addr = + (unsigned long)(&(tmp_desc_rx->status)); + tmp_desc_rx->desc_b.x_count = 0; + tmp_desc_rx->desc_b.config.b_DMA_EN = 1; /* enabled */ + tmp_desc_rx->desc_b.config.b_WNR = 1; /* Write to memory */ + tmp_desc_rx->desc_b.config.b_WDSIZE = 2; /* wordsize is 32 bits */ + tmp_desc_rx->desc_b.config.b_NDSIZE = 6; + tmp_desc_rx->desc_b.config.b_DI_EN = 1; /* enable interrupt */ + tmp_desc_rx->desc_b.config.b_FLOW = 7; /* large mode */ + rx_list_tail->desc_b.next_dma_desc = &(tmp_desc_rx->desc_a); + + rx_list_tail->next = tmp_desc_rx; + rx_list_tail = tmp_desc_rx; + } + rx_list_tail->next = rx_list_head; /* rx_list is a circle */ + rx_list_tail->desc_b.next_dma_desc = &(rx_list_head->desc_a); + current_rx_ptr = rx_list_head; + + return 0; + + init_error: + desc_list_free(); + printk(KERN_ERR CARDNAME ": kmalloc failed\n"); + return -ENOMEM; +} + +static void desc_list_free(void) +{ + struct net_dma_desc_rx *tmp_desc_rx; + struct net_dma_desc_tx *tmp_desc_tx; + int i; +#if !defined(CONFIG_BFIN_MAC_USE_L1) + dma_addr_t dma_handle = 0; +#endif + + if (tx_desc != NULL) { + tmp_desc_tx = tx_list_head; + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { + if (tmp_desc_tx != NULL) { + if (tmp_desc_tx->skb) { + dev_kfree_skb(tmp_desc_tx->skb); + tmp_desc_tx->skb = NULL; + } + + } + tmp_desc_tx = tmp_desc_tx->next; + } + bfin_mac_free(dma_handle, tx_desc); + } + + if (rx_desc != NULL) { + tmp_desc_rx = rx_list_head; + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { + if (tmp_desc_rx != NULL) { + if (tmp_desc_rx->skb) { + dev_kfree_skb(tmp_desc_rx->skb); + tmp_desc_rx->skb = NULL; + } + } + tmp_desc_rx = tmp_desc_rx->next; + } + bfin_mac_free(dma_handle, rx_desc); + } +} + +/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ + +/* Set FER regs to MUX in Ethernet pins */ +static void setup_pin_mux(void) +{ + unsigned int fer_val; + + /* + * FER reg bug work-around + * read it once + */ + fer_val = bfin_read_PORTH_FER(); + +#if defined(CONFIG_BFIN_MAC_RMII) + fer_val = 0xC373; +#else + fer_val = 0xffff; +#endif + /* write it twice to the same value */ + + bfin_write_PORTH_FER(fer_val); + bfin_write_PORTH_FER(fer_val); +} + +/* Wait until the previous MDC/MDIO transaction has completed */ +static void poll_mdc_done(void) +{ + /* poll the STABUSY bit */ + while ((bfin_read_EMAC_STAADD()) & STABUSY) { + }; +} + +/* Read an off-chip register in a PHY through the MDC/MDIO port */ +static u16 read_phy_reg(u16 PHYAddr, u16 RegAddr) +{ + poll_mdc_done(); + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) | STABUSY); /* read mode */ + poll_mdc_done(); + + return (u16) bfin_read_EMAC_STADAT(); +} + +/* Write an off-chip register in a PHY through the MDC/MDIO port */ +static void raw_write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data) +{ + bfin_write_EMAC_STADAT(Data); + + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | SET_REGAD(RegAddr) | STAOP | STABUSY); /* write mode */ + + poll_mdc_done(); +} + +static void write_phy_reg(u16 PHYAddr, u16 RegAddr, u32 Data) +{ + poll_mdc_done(); + raw_write_phy_reg(PHYAddr, RegAddr, Data); +} + +/* set up the phy */ +static void bf537mac_setphy(struct net_device *dev) +{ + u16 phydat; + u32 sysctl; + struct bf537mac_local *lp = netdev_priv(dev); + + pr_debug("start settting up phy\n"); + + /* Program PHY registers */ + phydat = 0; + + /* issue a reset */ + raw_write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, 0x8000); + + /* wait half a second */ + udelay(500); + + phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL); + + /* advertise flow control supported */ + phydat = read_phy_reg(lp->PhyAddr, PHYREG_ANAR); + phydat |= (1 << 10); + write_phy_reg(lp->PhyAddr, PHYREG_ANAR, phydat); + + phydat = 0; + if (lp->Negotiate) { + phydat |= 0x1000; /* enable auto negotiation */ + } else { + if (lp->FullDuplex) { + phydat |= (1 << 8); /* full duplex */ + } else { + phydat &= (~(1 << 8)); /* half duplex */ + } + if (!lp->Port10) { + phydat |= (1 << 13); /* 100 Mbps */ + } else { + phydat &= (~(1 << 13)); /* 10 Mbps */ + } + } + + if (lp->Loopback) { + phydat |= (1 << 14); /* enable TX->RX loopback */ +#if 0 + write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat); +#endif + } + + write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat); + udelay(500); + + phydat = read_phy_reg(lp->PhyAddr, PHYREG_MODECTL); + /* check for SMSC PHY */ + if ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID1) == 0x7) + && ((read_phy_reg(lp->PhyAddr, PHYREG_PHYID2) & 0xfff0) == 0xC0A0)) { + /* we have SMSC PHY so reqest interrupt on link down condition */ + write_phy_reg(lp->PhyAddr, 30, 0x0ff); /* enable interrupts */ + /* enable PHY_INT */ + sysctl = bfin_read_EMAC_SYSCTL(); + sysctl |= 0x1; +#if 0 + bfin_write_EMAC_SYSCTL(sysctl); +#endif + } +} + +/**************************************************************************/ +void setup_system_regs(struct net_device *dev) +{ + int PHYADDR; + unsigned short sysctl, phydat; + u32 opmode; + struct bf537mac_local *lp = netdev_priv(dev); + int count = 0; + + PHYADDR = lp->PhyAddr; + + /* Enable PHY output */ + if (!(bfin_read_VR_CTL() & PHYCLKOE)) + bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE); + + /* MDC = 2.5 MHz */ + sysctl = SET_MDCDIV(24); + /* Odd word alignment for Receive Frame DMA word */ + /* Configure checksum support and rcve frame word alignment */ +#if defined(BFIN_MAC_CSUM_OFFLOAD) + sysctl |= RXDWA | RXCKS; +#else + sysctl |= RXDWA; +#endif + bfin_write_EMAC_SYSCTL(sysctl); + /* auto negotiation on */ + /* full duplex */ + /* 100 Mbps */ + phydat = PHY_ANEG_EN | PHY_DUPLEX | PHY_SPD_SET; + write_phy_reg(PHYADDR, PHYREG_MODECTL, phydat); + + /* test if full duplex supported */ + do { + msleep(100); + phydat = read_phy_reg(PHYADDR, PHYREG_MODESTAT); + if (count > 30) { + printk(KERN_NOTICE CARDNAME + ": Link is down, please check your network connection\n"); + break; + } + count++; + } while (!(phydat & 0x0004)); + + phydat = read_phy_reg(PHYADDR, PHYREG_ANLPAR); + + if ((phydat & 0x0100) || (phydat & 0x0040)) { + opmode = FDMODE; + } else { + opmode = 0; + printk(KERN_INFO CARDNAME ": Network is set to half duplex\n"); + } + +#if defined(CONFIG_BFIN_MAC_RMII) + opmode |= RMII; /* For Now only 100MBit are supported */ +#endif + + bfin_write_EMAC_OPMODE(opmode); + +#if 0 + bfin_write_EMAC_MMC_CTL(RSTC | CROLL | MMCE); +#endif + bfin_write_EMAC_MMC_CTL(RSTC | CROLL); + + /* Initialize the TX DMA channel registers */ + bfin_write_DMA2_X_COUNT(0); + bfin_write_DMA2_X_MODIFY(4); + bfin_write_DMA2_Y_COUNT(0); + bfin_write_DMA2_Y_MODIFY(0); + + /* Initialize the RX DMA channel registers */ + bfin_write_DMA1_X_COUNT(0); + bfin_write_DMA1_X_MODIFY(4); + bfin_write_DMA1_Y_COUNT(0); + bfin_write_DMA1_Y_MODIFY(0); +} + +void setup_mac_addr(u8 * mac_addr) +{ + /* this depends on a little-endian machine */ + bfin_write_EMAC_ADDRLO(*(u32 *) & mac_addr[0]); + bfin_write_EMAC_ADDRHI(*(u16 *) & mac_addr[4]); +} + +static void adjust_tx_list(void) +{ + if (tx_list_head->status.status_word != 0 + && current_tx_ptr != tx_list_head) { + goto adjust_head; /* released something, just return; */ + } + + /* if nothing released, check wait condition */ + /* current's next can not be the head, otherwise the dma will not stop as we want */ + if (current_tx_ptr->next->next == tx_list_head) { + while (tx_list_head->status.status_word == 0) { + udelay(10); + if (tx_list_head->status.status_word != 0 + || !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) { + goto adjust_head; + } + } + if (tx_list_head->status.status_word != 0) { + goto adjust_head; + } + } + + return; + + adjust_head: + do { + tx_list_head->desc_a.config.b_DMA_EN = 0; + tx_list_head->status.status_word = 0; + if (tx_list_head->skb) { + dev_kfree_skb(tx_list_head->skb); + tx_list_head->skb = NULL; + } else { + printk(KERN_ERR CARDNAME + ": no sk_buff in a transmitted frame!\n"); + } + tx_list_head = tx_list_head->next; + } while (tx_list_head->status.status_word != 0 + && current_tx_ptr != tx_list_head); + return; + +} + +static int bf537mac_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct bf537mac_local *lp = netdev_priv(dev); + unsigned int data; + + current_tx_ptr->skb = skb; + /* Is skb->data always 16-bit aligned? Do we need to memcpy((char *)(tail->packet + 2),skb->data,len)? */ + if ((((unsigned int)(skb->data)) & 0x02) == 2) { + /* move skb->data to current_tx_ptr payload */ + data = (unsigned int)(skb->data) - 2; + *((unsigned short *)data) = (unsigned short)(skb->len); + current_tx_ptr->desc_a.start_addr = (unsigned long)data; + blackfin_dcache_flush_range(data, (data + (skb->len)) + 2); /* this is important! */ + + } else { + *((unsigned short *)(current_tx_ptr->packet)) = + (unsigned short)(skb->len); + memcpy((char *)(current_tx_ptr->packet + 2), skb->data, + (skb->len)); + current_tx_ptr->desc_a.start_addr = + (unsigned long)current_tx_ptr->packet; + if (current_tx_ptr->status.status_word != 0) + current_tx_ptr->status.status_word = 0; + blackfin_dcache_flush_range((unsigned int)current_tx_ptr-> + packet, + (unsigned int)(current_tx_ptr-> + packet + skb->len) + + 2); + } + + current_tx_ptr->desc_a.config.b_DMA_EN = 1; /* enable this packet's dma */ + + if (bfin_read_DMA2_IRQ_STATUS() & 0x08) { /* tx dma is running, just return */ + goto out; + } else { + /* tx dma is not running */ + bfin_write_DMA2_NEXT_DESC_PTR(&(current_tx_ptr->desc_a)); + /* dma enabled, read from memory, size is 6 */ + bfin_write_DMA2_CONFIG(*((unsigned short *)(&(current_tx_ptr->desc_a.config)))); + /* Turn on the EMAC tx */ + bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() | TE); + } + + out: + adjust_tx_list(); + current_tx_ptr = current_tx_ptr->next; + dev->trans_start = jiffies; + lp->stats.tx_packets++; + lp->stats.tx_bytes += (skb->len); + return 0; +} + +static void bf537mac_rx(struct net_device *dev) +{ + struct sk_buff *skb, *new_skb; + struct bf537mac_local *lp = netdev_priv(dev); + unsigned short len; + + /* allocat a new skb for next time receive */ + skb = current_rx_ptr->skb; + new_skb = dev_alloc_skb(PKT_BUF_SZ + 2); + if (!new_skb) { + printk(KERN_NOTICE CARDNAME + ": rx: low on mem - packet dropped\n"); + lp->stats.rx_dropped++; + goto out; + } + /* reserve 2 bytes for RXDWA padding */ + skb_reserve(new_skb, 2); + current_rx_ptr->skb = new_skb; + current_rx_ptr->desc_a.start_addr = (unsigned long)new_skb->data - 2; + +#if 0 + int i; + if (len >= 64) { + for (i=0;istatus.status_word) & RX_FRLEN); + skb_put(skb, len); + blackfin_dcache_invalidate_range((unsigned long)skb->head, + (unsigned long)skb->tail); + + dev->last_rx = jiffies; + skb->dev = dev; + skb->protocol = eth_type_trans(skb, dev); +#if defined(BFIN_MAC_CSUM_OFFLOAD) + skb->csum = current_rx_ptr->status.ip_payload_csum; + skb->ip_summed = CHECKSUM_PARTIAL; +#endif + + netif_rx(skb); + lp->stats.rx_packets++; + lp->stats.rx_bytes += len; + current_rx_ptr->status.status_word = 0x00000000; + current_rx_ptr = current_rx_ptr->next; + + out: + return; +} + +/* interrupt routine to handle rx and error signal */ +static irqreturn_t bf537mac_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + int number = 0; + + get_one_packet: + if (current_rx_ptr->status.status_word == 0) { /* no more new packet received */ + if (number == 0) { + if (current_rx_ptr->next->status.status_word != 0) { + current_rx_ptr = current_rx_ptr->next; + goto real_rx; + } + } + bfin_write_DMA1_IRQ_STATUS(bfin_read_DMA1_IRQ_STATUS() | + DMA_DONE | DMA_ERR); + return IRQ_HANDLED; + } + + real_rx: + bf537mac_rx(dev); + number++; + goto get_one_packet; +} + +#ifdef CONFIG_NET_POLL_CONTROLLER +static void bf537mac_poll(struct net_device *dev) +{ + disable_irq(IRQ_MAC_RX); + bf537mac_interrupt(IRQ_MAC_RX, dev); + enable_irq(IRQ_MAC_RX); +} +#endif /* CONFIG_NET_POLL_CONTROLLER */ + +static void bf537mac_reset(void) +{ + unsigned int opmode; + + opmode = bfin_read_EMAC_OPMODE(); + opmode &= (~RE); + opmode &= (~TE); + /* Turn off the EMAC */ + bfin_write_EMAC_OPMODE(bfin_read_EMAC_OPMODE() & opmode); +} + +/* + * Enable Interrupts, Receive, and Transmit + */ +static int bf537mac_enable(struct net_device *dev) +{ + u32 opmode; + + pr_debug("%s: %s\n", dev->name, __FUNCTION__); + + /* Set RX DMA */ + bfin_write_DMA1_NEXT_DESC_PTR(&(rx_list_head->desc_a)); + bfin_write_DMA1_CONFIG(* + ((unsigned short + *)(&(rx_list_head->desc_a.config)))); + + /* Wait MII done */ + poll_mdc_done(); + + /* We enable only RX here */ + /* ASTP : Enable Automatic Pad Stripping + PR : Promiscuous Mode for test + PSF : Receive frames with total length less than 64 bytes. + FDMODE : Full Duplex Mode + LB : Internal Loopback for test + RE : Receiver Enable */ + opmode = bfin_read_EMAC_OPMODE(); + if (opmode & FDMODE) + opmode |= PSF; + else + opmode |= DRO | DC | PSF; + opmode |= RE; + +#if defined(CONFIG_BFIN_MAC_RMII) + opmode |= RMII; /* For Now only 100MBit are supported */ +#ifdef CONFIG_BF_REV_0_2 + opmode |= TE; +#endif +#endif + /* Turn on the EMAC rx */ + bfin_write_EMAC_OPMODE(opmode); + + return 0; +} + +/* Our watchdog timed out. Called by the networking layer */ +static void bf537mac_timeout(struct net_device *dev) +{ + pr_debug("%s: %s\n", dev->name, __FUNCTION__); + + bf537mac_reset(); + + /* reset tx queue */ + tx_list_tail = tx_list_head->next; + + bf537mac_enable(dev); + + /* We can accept TX packets again */ + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +/* + * Get the current statistics. + * This may be called with the card open or closed. + */ +static struct net_device_stats *bf537mac_query_statistics(struct net_device + *dev) +{ + struct bf537mac_local *lp = netdev_priv(dev); + + pr_debug("%s: %s\n", dev->name, __FUNCTION__); + + return &lp->stats; +} + +/* + * This routine will, depending on the values passed to it, + * either make it accept multicast packets, go into + * promiscuous mode (for TCPDUMP and cousins) or accept + * a select set of multicast packets + */ +static void bf537mac_set_multicast_list(struct net_device *dev) +{ + u32 sysctl; + + if (dev->flags & IFF_PROMISC) { + printk(KERN_INFO "%s: set to promisc mode\n", dev->name); + sysctl = bfin_read_EMAC_OPMODE(); + sysctl |= RAF; + bfin_write_EMAC_OPMODE(sysctl); + } else if (dev->flags & IFF_ALLMULTI || dev->mc_count > 16) { + /* accept all multicast */ + sysctl = bfin_read_EMAC_OPMODE(); + sysctl |= PAM; + bfin_write_EMAC_OPMODE(sysctl); + } else if (dev->mc_count) { + /* set multicast */ + } else { + /* clear promisc or multicast mode */ + sysctl = bfin_read_EMAC_OPMODE(); + sysctl &= ~(RAF | PAM); + bfin_write_EMAC_OPMODE(sysctl); + } +} + +/* + * this puts the device in an inactive state + */ +static void bf537mac_shutdown(struct net_device *dev) +{ + /* Turn off the EMAC */ + bfin_write_EMAC_OPMODE(0x00000000); + /* Turn off the EMAC RX DMA */ + bfin_write_DMA1_CONFIG(0x0000); + bfin_write_DMA2_CONFIG(0x0000); +} + +/* + * Open and Initialize the interface + * + * Set up everything, reset the card, etc.. + */ +static int bf537mac_open(struct net_device *dev) +{ + pr_debug("%s: %s\n", dev->name, __FUNCTION__); + + /* + * Check that the address is valid. If its not, refuse + * to bring the device up. The user must specify an + * address using ifconfig eth0 hw ether xx:xx:xx:xx:xx:xx + */ + if (!is_valid_ether_addr(dev->dev_addr)) { + printk(KERN_WARNING CARDNAME ": no valid ethernet hw addr\n"); + return -EINVAL; + } + + /* initial rx and tx list */ + desc_list_init(); + + bf537mac_setphy(dev); + setup_system_regs(dev); + bf537mac_reset(); + bf537mac_enable(dev); + + pr_debug("hardware init finished\n"); + netif_start_queue(dev); + netif_carrier_on(dev); + + return 0; +} + +/* + * + * this makes the board clean up everything that it can + * and not talk to the outside world. Caused by + * an 'ifconfig ethX down' + */ +static int bf537mac_close(struct net_device *dev) +{ + pr_debug("%s: %s\n", dev->name, __FUNCTION__); + + netif_stop_queue(dev); + netif_carrier_off(dev); + + /* clear everything */ + bf537mac_shutdown(dev); + + /* free the rx/tx buffers */ + desc_list_free(); + + return 0; +} + +static int __init bf537mac_probe(struct net_device *dev) +{ + struct bf537mac_local *lp = netdev_priv(dev); + int retval; + + /* Grab the MAC address in the MAC */ + *(u32 *) (&(dev->dev_addr[0])) = bfin_read_EMAC_ADDRLO(); + *(u16 *) (&(dev->dev_addr[4])) = (u16) bfin_read_EMAC_ADDRHI(); + +/* probe mac */ + /*todo: how to proble? which is revision_register */ + bfin_write_EMAC_ADDRLO(0x12345678); + if (bfin_read_EMAC_ADDRLO() != 0x12345678) { + pr_debug("can't detect bf537 mac!\n"); + retval = -ENODEV; + goto err_out; + } + + /*Is it valid? (Did bootloader initialize it?) */ + if (!is_valid_ether_addr(dev->dev_addr)) { + /* Grab the MAC from the board somehow - this is done in the + arch/blackfin/boards/bf537/boardname.c */ + get_bf537_ether_addr(dev->dev_addr); + } + + /* If still not valid, get a random one */ + if (!is_valid_ether_addr(dev->dev_addr)) { + random_ether_addr(dev->dev_addr); + } + + setup_mac_addr(dev->dev_addr); + + /* Fill in the fields of the device structure with ethernet values. */ + ether_setup(dev); + + dev->open = bf537mac_open; + dev->stop = bf537mac_close; + dev->hard_start_xmit = bf537mac_hard_start_xmit; + dev->tx_timeout = bf537mac_timeout; + dev->get_stats = bf537mac_query_statistics; + dev->set_multicast_list = bf537mac_set_multicast_list; +#if 0 + dev->ethtool_ops = &bf537mac_ethtool_ops; +#endif +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = bf537mac_poll; +#endif + + /* fill in some of the fields */ + lp->version = 1; + lp->PhyAddr = 0x01; + lp->CLKIN = 25; + lp->FullDuplex = 0; + lp->Negotiate = 1; + lp->FlowControl = 0; + spin_lock_init(&lp->lock); + + /* set the GPIO pins to Ethernet mode */ + setup_pin_mux(); + + /* now, enable interrupts */ + /* register irq handler */ + if (request_irq + (IRQ_MAC_RX, bf537mac_interrupt, IRQF_DISABLED | IRQF_SHARED, + "BFIN537_MAC_RX", dev)) { + printk(KERN_WARNING CARDNAME + ": Unable to attach BlackFin MAC RX interrupt\n"); + return -EBUSY; + } + + /* Enable PHY output early */ + if (!(bfin_read_VR_CTL() & PHYCLKOE)) + bfin_write_VR_CTL(bfin_read_VR_CTL() | PHYCLKOE); + + retval = register_netdev(dev); + if (retval == 0) { + /* now, print out the card info, in a short format.. */ + printk(KERN_INFO "Blackfin mac net device registered\n"); + } + + err_out: + return retval; +} + +static int bfin_mac_probe(struct platform_device *pdev) +{ + struct net_device *ndev; + + ndev = alloc_etherdev(sizeof(struct bf537mac_local)); + + if (!ndev) { + printk(KERN_WARNING CARDNAME ": could not allocate device\n"); + return -ENOMEM; + } + + if (bf537mac_probe(ndev) != 0) { + platform_set_drvdata(pdev, NULL); + free_netdev(ndev); + printk(KERN_WARNING CARDNAME ": not found\n"); + return -ENODEV; + } + + SET_MODULE_OWNER(ndev); + SET_NETDEV_DEV(ndev, &pdev->dev); + + platform_set_drvdata(pdev, ndev); + + return 0; +} + +static int bfin_mac_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + + platform_set_drvdata(pdev, NULL); + + unregister_netdev(ndev); + + free_irq(IRQ_MAC_RX, ndev); + + free_netdev(ndev); + + return 0; +} + +static int bfin_mac_suspend(struct platform_device *pdev, pm_message_t state) +{ + return 0; +} + +static int bfin_mac_resume(struct platform_device *pdev) +{ + return 0; +} + +static struct platform_driver bfin_mac_driver = { + .probe = bfin_mac_probe, + .remove = bfin_mac_remove, + .resume = bfin_mac_resume, + .suspend = bfin_mac_suspend, + .driver = { + .name = CARDNAME, + }, +}; + +static int __init bfin_mac_init(void) +{ + return platform_driver_register(&bfin_mac_driver); +} + +module_init(bfin_mac_init); + +static void __exit bfin_mac_cleanup(void) +{ + platform_driver_unregister(&bfin_mac_driver); +} + +module_exit(bfin_mac_cleanup); diff -puN /dev/null drivers/net/bfin_mac.h --- /dev/null +++ a/drivers/net/bfin_mac.h @@ -0,0 +1,147 @@ +/* + * File: drivers/net/bfin_mac.h + * Based on: + * Author: Luke Yang + * + * Created: + * Description: + * + * Modified: + * Copyright 2004-2006 Analog Devices Inc. + * + * Bugs: Enter bugs at http://blackfin.uclinux.org/ + * + * 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 ; either version 2, or (at your option) + * any later version. + * + * 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 ; see the file COPYING. + * If not, write to the Free Software Foundation, + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + * PHY REGISTER NAMES + */ +#define PHYREG_MODECTL 0x0000 +#define PHYREG_MODESTAT 0x0001 +#define PHYREG_PHYID1 0x0002 +#define PHYREG_PHYID2 0x0003 +#define PHYREG_ANAR 0x0004 +#define PHYREG_ANLPAR 0x0005 +#define PHYREG_ANER 0x0006 +#define PHYREG_NSR 0x0010 +#define PHYREG_LBREMR 0x0011 +#define PHYREG_REC 0x0012 +#define PHYREG_10CFG 0x0013 +#define PHYREG_PHY1_1 0x0014 +#define PHYREG_PHY1_2 0x0015 +#define PHYREG_PHY2 0x0016 +#define PHYREG_TW_1 0x0017 +#define PHYREG_TW_2 0x0018 +#define PHYREG_TEST 0x0019 + +#define PHY_RESET 0x8000 +#define PHY_ANEG_EN 0x1000 +#define PHY_DUPLEX 0x0100 +#define PHY_SPD_SET 0x2000 + +#define BFIN_MAC_CSUM_OFFLOAD + +typedef struct _DMA_CONFIG { + unsigned short b_DMA_EN:1; /* Bit 0 : DMA Enable */ + unsigned short b_WNR:1; /* Bit 1 : DMA Direction */ + unsigned short b_WDSIZE:2; /* Bit 2 & 3 : DMA Tranfer Word size */ + unsigned short b_DMA2D:1; /* Bit 4 : DMA Mode 2D or 1D */ + unsigned short b_RESTART:1; /* Bit 5 : Retain the FIFO */ + unsigned short b_DI_SEL:1; /* Bit 6 : Data Interrupt Timing Select */ + unsigned short b_DI_EN:1; /* Bit 7 : Data Interrupt Enable */ + unsigned short b_NDSIZE:4; /* Bit 8 to 11 : Flex descriptor Size */ + unsigned short b_FLOW:3; /* Bit 12 to 14 : FLOW */ +} DMA_CONFIG_REG; + +struct dma_descriptor { + struct dma_descriptor *next_dma_desc; + unsigned long start_addr; + DMA_CONFIG_REG config; + unsigned short x_count; +}; + +#if 0 +struct status_area { + unsigned short ip_hdr_chksum; /* the IP header checksum */ + unsigned short ip_payload_chksum; /* the IP header and payload checksum */ + unsigned long status_word; /* the frame status word */ +}; +#endif + +struct status_area_rx { +#if defined(BFIN_MAC_CSUM_OFFLOAD) + unsigned short ip_hdr_csum; /* ip header checksum */ + unsigned short ip_payload_csum; /* ip payload(udp or tcp or others) checksum */ +#endif + unsigned long status_word; /* the frame status word */ +}; + +struct status_area_tx { + unsigned long status_word; /* the frame status word */ +}; + +/* use two descriptors for a packet */ +struct net_dma_desc_rx { + struct net_dma_desc_rx *next; + struct sk_buff *skb; + struct dma_descriptor desc_a; + struct dma_descriptor desc_b; + volatile struct status_area_rx status; +}; + +/* use two descriptors for a packet */ +struct net_dma_desc_tx { + struct net_dma_desc_tx *next; + struct sk_buff *skb; + struct dma_descriptor desc_a; + struct dma_descriptor desc_b; + volatile unsigned char packet[1560]; + volatile struct status_area_tx status; +}; + +struct bf537mac_local { + /* + * these are things that the kernel wants me to keep, so users + * can find out semi-useless statistics of how well the card is + * performing + */ + struct net_device_stats stats; + + int version; + + int FlowEnabled; /* record if data flow is active */ + int EtherIntIVG; /* IVG for the ethernet interrupt */ + int RXIVG; /* IVG for the RX completion */ + int TXIVG; /* IVG for the TX completion */ + int PhyAddr; /* PHY address */ + int OpMode; /* set these bits n the OPMODE regs */ + int Port10; /* set port speed to 10 Mbit/s */ + int GenChksums; /* IP checksums to be calculated */ + int NoRcveLnth; /* dont insert recv length at start of buffer */ + int StripPads; /* remove trailing pad bytes */ + int FullDuplex; /* set full duplex mode */ + int Negotiate; /* enable auto negotiation */ + int Loopback; /* loopback at the PHY */ + int Cache; /* Buffers may be cached */ + int FlowControl; /* flow control active */ + int CLKIN; /* clock in value in MHZ */ + unsigned short IntMask; /* interrupt mask */ + unsigned char Mac[6]; /* MAC address of the board */ + spinlock_t lock; +}; + +extern void get_bf537_ether_addr(char *addr); _ - 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/