Hi Jeff: Can this driver be merged for 2.6.23-rcN?
Thanks - Bryan Wu On Tue, 2007-07-17 at 14:43 +0800, Bryan Wu wrote: > This patch implements the driver necessary use the Analog Devices > Blackfin processor's on-chip ethernet MAC controller. > > [try#2] > - add timeout control > - kill dma_config_reg bitfields > - some trivial cleanup > > [try#3] > - add endianess check > - add DRV_NAME, DRV_VERSION... driver information string > - add some comments for silicon anomaly and dma API confusion > - some code trivial cleanup > > [try#4] > - add Blackfin latest GPIO pin mux opertion with Michael Hennerich's > help and Dan's review > - rewrite the DMA descriptor list operation in a more readable way > by Joe's review > > [try#5] > - cleanup some coding style by Joe's review. > > [try#6] > - 1.1 version fix a bug when set up multicast list pointed by Mr. yoshfuji > - rearrange the desc_list_free function. > > Signed-off-by: Michael Hennerich <[EMAIL PROTECTED]> > Signed-off-by: Bryan Wu <[EMAIL PROTECTED]> > Cc: Michael Buesch <[EMAIL PROTECTED]> > Cc: Mike Frysinger <[EMAIL PROTECTED]> > Cc: Jeff Garzik <[EMAIL PROTECTED]> > Cc: Christoph Hellwig <[EMAIL PROTECTED]> > Cc: Dan Williams <[EMAIL PROTECTED]> > Cc: Joe Perches <[EMAIL PROTECTED]> > Cc: YOSHIFUJI Hideaki <[EMAIL PROTECTED]> > Signed-off-by: Andrew Morton <[EMAIL PROTECTED]> > > --- > MAINTAINERS | 7 + > drivers/net/Kconfig | 44 +++ > drivers/net/Makefile | 1 + > drivers/net/bfin_mac.c | 1009 > ++++++++++++++++++++++++++++++++++++++++++++++++ > drivers/net/bfin_mac.h | 132 +++++++ > 5 files changed, 1193 insertions(+), 0 deletions(-) > create mode 100644 drivers/net/bfin_mac.c > create mode 100644 drivers/net/bfin_mac.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index 3914269..65d5805 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -754,6 +754,13 @@ L: [EMAIL PROTECTED] (subscribers-only) > W: http://blackfin.uclinux.org > S: Supported > > +BLACKFIN EMAC DRIVER > +P: Bryan Wu > +M: [EMAIL PROTECTED] > +L: [EMAIL PROTECTED] (subscribers-only) > +W: http://blackfin.uclinux.org > +S: Supported > + > BLACKFIN RTC DRIVER > P: Mike Frysinger > M: [EMAIL PROTECTED] > diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig > index d17d64e..7a3edaf 100644 > --- a/drivers/net/Kconfig > +++ b/drivers/net/Kconfig > @@ -848,6 +848,50 @@ config ULTRA32 > <file:Documentation/networking/net-modules.txt>. The module > will be called smc-ultra32. > > +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 --git a/drivers/net/Makefile b/drivers/net/Makefile > index c26b867..9e71eb0 100644 > --- a/drivers/net/Makefile > +++ b/drivers/net/Makefile > @@ -199,6 +199,7 @@ 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 --git a/drivers/net/bfin_mac.c b/drivers/net/bfin_mac.c > new file mode 100644 > index 0000000..9a08d65 > --- /dev/null > +++ b/drivers/net/bfin_mac.c > @@ -0,0 +1,1009 @@ > +/* > + * File: drivers/net/bfin_mac.c > + * Based on: > + * Maintainer: > + * Bryan Wu <[EMAIL PROTECTED]> > + * > + * Original author: > + * Luke Yang <[EMAIL PROTECTED]> > + * > + * 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 <linux/init.h> > +#include <linux/module.h> > +#include <linux/kernel.h> > +#include <linux/sched.h> > +#include <linux/slab.h> > +#include <linux/delay.h> > +#include <linux/timer.h> > +#include <linux/errno.h> > +#include <linux/irq.h> > +#include <linux/io.h> > +#include <linux/ioport.h> > +#include <linux/crc32.h> > +#include <linux/device.h> > +#include <linux/spinlock.h> > +#include <linux/ethtool.h> > +#include <linux/mii.h> > + > +#include <linux/netdevice.h> > +#include <linux/etherdevice.h> > +#include <linux/skbuff.h> > + > +#include <linux/platform_device.h> > +#include <linux/netdevice.h> > +#include <linux/etherdevice.h> > +#include <linux/skbuff.h> > + > +#include <asm/dma.h> > +#include <linux/dma-mapping.h> > + > +#include <asm/blackfin.h> > +#include <asm/cacheflush.h> > +#include <asm/portmux.h> > + > +#include "bfin_mac.h" > + > +#define DRV_NAME "bfin_mac" > +#define DRV_VERSION "1.1" > +#define DRV_AUTHOR "Bryan Wu, Luke Yang" > +#define DRV_DESC "Blackfin BF53[67] on-chip Ethernet MAC driver" > + > +MODULE_AUTHOR(DRV_AUTHOR); > +MODULE_LICENSE("GPL"); > +MODULE_DESCRIPTION(DRV_DESC); > + > +#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_KERNEL) > +# define bfin_mac_free(dma_handle, ptr) \ > + dma_free_coherent(NULL, sizeof(*ptr), ptr, dma_handle) > +#endif > + > +#define PKT_BUF_SZ 1580 > + > +#define MAX_TIMEOUT_CNT 500 > + > +/* 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 void desc_list_free(void) > +{ > + struct net_dma_desc_rx *r; > + struct net_dma_desc_tx *t; > + int i; > +#if !defined(CONFIG_BFIN_MAC_USE_L1) > + dma_addr_t dma_handle = 0; > +#endif > + > + if (tx_desc) { > + t = tx_list_head; > + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { > + if (t) { > + if (t->skb) { > + dev_kfree_skb(t->skb); > + t->skb = NULL; > + } > + t = t->next; > + } > + } > + bfin_mac_free(dma_handle, tx_desc); > + } > + > + if (rx_desc) { > + r = rx_list_head; > + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { > + if (r) { > + if (r->skb) { > + dev_kfree_skb(r->skb); > + r->skb = NULL; > + } > + r = r->next; > + } > + } > + bfin_mac_free(dma_handle, rx_desc); > + } > +} > + > +static int desc_list_init(void) > +{ > + int i; > + struct sk_buff *new_skb; > +#if !defined(CONFIG_BFIN_MAC_USE_L1) > + /* > + * This dma_handle is useless in Blackfin dma_alloc_coherent(). > + * The real dma handler is the return value of dma_alloc_coherent(). > + */ > + 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 */ > + tx_list_head = tx_list_tail = tx_desc; > + > + for (i = 0; i < CONFIG_BFIN_TX_DESC_NUM; i++) { > + struct net_dma_desc_tx *t = tx_desc + i; > + struct dma_descriptor *a = &(t->desc_a); > + struct dma_descriptor *b = &(t->desc_b); > + > + /* > + * disable DMA > + * read from memory WNR = 0 > + * wordsize is 32 bits > + * 6 half words is desc size > + * large desc flow > + */ > + a->config = WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; > + a->start_addr = (unsigned long)t->packet; > + a->x_count = 0; > + a->next_dma_desc = b; > + > + /* > + * enabled DMA > + * write to memory WNR = 1 > + * wordsize is 32 bits > + * disable interrupt > + * 6 half words is desc size > + * large desc flow > + */ > + b->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; > + b->start_addr = (unsigned long)(&(t->status)); > + b->x_count = 0; > + > + t->skb = NULL; > + tx_list_tail->desc_b.next_dma_desc = a; > + tx_list_tail->next = t; > + tx_list_tail = t; > + } > + 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 */ > + rx_list_head = rx_list_tail = rx_desc; > + > + for (i = 0; i < CONFIG_BFIN_RX_DESC_NUM; i++) { > + struct net_dma_desc_rx *r = rx_desc + i; > + struct dma_descriptor *a = &(r->desc_a); > + struct dma_descriptor *b = &(r->desc_b); > + > + /* allocate a new skb for next time receive */ > + new_skb = dev_alloc_skb(PKT_BUF_SZ + 2); > + if (!new_skb) { > + printk(KERN_NOTICE DRV_NAME > + ": init: low on mem - packet dropped\n"); > + goto init_error; > + } > + skb_reserve(new_skb, 2); > + r->skb = new_skb; > + > + /* > + * enabled DMA > + * write to memory WNR = 1 > + * wordsize is 32 bits > + * disable interrupt > + * 6 half words is desc size > + * large desc flow > + */ > + a->config = DMAEN | WNR | WDSIZE_32 | NDSIZE_6 | DMAFLOW_LARGE; > + /* since RXDWA is enabled */ > + a->start_addr = (unsigned long)new_skb->data - 2; > + a->x_count = 0; > + a->next_dma_desc = b; > + > + /* > + * enabled DMA > + * write to memory WNR = 1 > + * wordsize is 32 bits > + * enable interrupt > + * 6 half words is desc size > + * large desc flow > + */ > + b->config = DMAEN | WNR | WDSIZE_32 | DI_EN | > + NDSIZE_6 | DMAFLOW_LARGE; > + b->start_addr = (unsigned long)(&(r->status)); > + b->x_count = 0; > + > + rx_list_tail->desc_b.next_dma_desc = a; > + rx_list_tail->next = r; > + rx_list_tail = r; > + } > + 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 DRV_NAME ": kmalloc failed\n"); > + return -ENOMEM; > +} > + > + > +/*---PHY CONTROL AND CONFIGURATION-----------------------------------------*/ > + > +/* Set FER regs to MUX in Ethernet pins */ > +static int setup_pin_mux(int action) > +{ > +#if defined(CONFIG_BFIN_MAC_RMII) > + u16 pin_req[] = P_RMII0; > +#else > + u16 pin_req[] = P_MII0; > +#endif > + > + if (action) { > + if (peripheral_request_list(pin_req, DRV_NAME)) { > + printk(KERN_ERR DRV_NAME > + ": Requesting Peripherals failed\n"); > + return -EFAULT; > + } > + } else > + peripheral_free_list(pin_req); > + > + return 0; > +} > + > +/* Wait until the previous MDC/MDIO transaction has completed */ > +static void poll_mdc_done(void) > +{ > + int timeout_cnt = MAX_TIMEOUT_CNT; > + > + /* poll the STABUSY bit */ > + while ((bfin_read_EMAC_STAADD()) & STABUSY) { > + mdelay(10); > + if (timeout_cnt-- < 0) { > + printk(KERN_ERR DRV_NAME > + ": wait MDC/MDIO transaction to complete timeout\n"); > + break; > + } > + } > +} > + > +/* 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(); > + /* read mode */ > + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | > + SET_REGAD(RegAddr) | > + STABUSY); > + 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); > + > + /* write mode */ > + bfin_write_EMAC_STAADD(SET_PHYAD(PHYAddr) | > + SET_REGAD(RegAddr) | > + STAOP | > + STABUSY); > + > + 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; > + struct bf537mac_local *lp = netdev_priv(dev); > + > + /* Program PHY registers */ > + pr_debug("start setting up phy\n"); > + > + /* issue a reset */ > + raw_write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, 0x8000); > + > + /* wait half a second */ > + msleep(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 */ > + > + write_phy_reg(lp->PhyAddr, PHYREG_MODECTL, phydat); > + msleep(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 > + */ > + > + /* enable interrupts */ > + write_phy_reg(lp->PhyAddr, 30, 0x0ff); > + } > +} > + > +/**************************************************************************/ > +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 DRV_NAME ": Link is down\n"); > + printk(KERN_NOTICE DRV_NAME > + "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 DRV_NAME > + ": 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); > + > + 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) > +{ > + u32 addr_low = le32_to_cpu(*(__le32 *) & mac_addr[0]); > + u16 addr_hi = le16_to_cpu(*(__le16 *) & mac_addr[4]); > + > + /* this depends on a little-endian machine */ > + bfin_write_EMAC_ADDRLO(addr_low); > + bfin_write_EMAC_ADDRHI(addr_hi); > +} > + > +static void adjust_tx_list(void) > +{ > + int timeout_cnt = MAX_TIMEOUT_CNT; > + > + 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) { > + mdelay(10); > + if (tx_list_head->status.status_word != 0 > + || !(bfin_read_DMA2_IRQ_STATUS() & 0x08)) { > + goto adjust_head; > + } > + if (timeout_cnt-- < 0) { > + printk(KERN_ERR DRV_NAME > + ": wait for adjust tx list head timeout\n"); > + break; > + } > + } > + if (tx_list_head->status.status_word != 0) { > + goto adjust_head; > + } > + } > + > + return; > + > +adjust_head: > + do { > + tx_list_head->desc_a.config &= ~DMAEN; > + 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 DRV_NAME > + ": 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; > + /* this is important! */ > + blackfin_dcache_flush_range(data, (data + (skb->len)) + 2); > + > + } 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); > + } > + > + /* enable this packet's dma */ > + current_tx_ptr->desc_a.config |= DMAEN; > + > + /* tx dma is running, just return */ > + if (bfin_read_DMA2_IRQ_STATUS() & 0x08) > + goto out; > + > + /* 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(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; > + > + /* allocate 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 DRV_NAME > + ": 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; > + > + len = (unsigned short)((current_rx_ptr->status.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(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(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) { > + /* accept all multicast */ > + sysctl = bfin_read_EMAC_OPMODE(); > + sysctl |= PAM; > + bfin_write_EMAC_OPMODE(sysctl); > + } 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 DRV_NAME ": 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 */ > + *(__le32 *) (&(dev->dev_addr[0])) = > cpu_to_le32(bfin_read_EMAC_ADDRLO()); > + *(__le16 *) (&(dev->dev_addr[4])) = cpu_to_le16((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; > + } > + > + /* set the GPIO pins to Ethernet mode */ > + retval = setup_pin_mux(1); > + > + if (retval) > + return retval; > + > + /*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/mach-bf537/boards/eth_mac.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; > +#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); > + > + /* 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 DRV_NAME > + ": 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 "%s: Version %s, %s\n", > + DRV_NAME, DRV_VERSION, DRV_DESC); > + } > + > +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 DRV_NAME ": could not allocate device\n"); > + return -ENOMEM; > + } > + > + SET_MODULE_OWNER(ndev); > + SET_NETDEV_DEV(ndev, &pdev->dev); > + > + platform_set_drvdata(pdev, ndev); > + > + if (bf537mac_probe(ndev) != 0) { > + platform_set_drvdata(pdev, NULL); > + free_netdev(ndev); > + printk(KERN_WARNING DRV_NAME ": not found\n"); > + return -ENODEV; > + } > + > + 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); > + > + setup_pin_mux(0); > + > + 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 = DRV_NAME, > + }, > +}; > + > +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 --git a/drivers/net/bfin_mac.h b/drivers/net/bfin_mac.h > new file mode 100644 > index 0000000..af87189 > --- /dev/null > +++ b/drivers/net/bfin_mac.h > @@ -0,0 +1,132 @@ > +/* > + * File: drivers/net/bfin_mac.c > + * Based on: > + * Maintainer: > + * Bryan Wu <[EMAIL PROTECTED]> > + * > + * Original author: > + * Luke Yang <[EMAIL PROTECTED]> > + * > + * 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 > + > +struct dma_descriptor { > + struct dma_descriptor *next_dma_desc; > + unsigned long start_addr; > + unsigned short config; > + unsigned short x_count; > +}; > + > +struct status_area_rx { > +#if defined(BFIN_MAC_CSUM_OFFLOAD) > + unsigned short ip_hdr_csum; /* ip header checksum */ > + /* ip payload(udp or tcp or others) checksum */ > + unsigned short ip_payload_csum; > +#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; > + 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; > + unsigned char packet[1560]; > + 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 netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
