diff options
Diffstat (limited to 'drivers/net/arm/am79c961a.c')
| -rw-r--r-- | drivers/net/arm/am79c961a.c | 770 |
1 files changed, 0 insertions, 770 deletions
diff --git a/drivers/net/arm/am79c961a.c b/drivers/net/arm/am79c961a.c deleted file mode 100644 index 3b1416e3d21..00000000000 --- a/drivers/net/arm/am79c961a.c +++ /dev/null @@ -1,770 +0,0 @@ -/* - * linux/drivers/net/am79c961.c - * - * by Russell King <rmk@arm.linux.org.uk> 1995-2001. - * - * 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. - * - * Derived from various things including skeleton.c - * - * This is a special driver for the am79c961A Lance chip used in the - * Intel (formally Digital Equipment Corp) EBSA110 platform. Please - * note that this can not be built as a module (it doesn't make sense). - */ -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/crc32.h> -#include <linux/bitops.h> -#include <linux/platform_device.h> -#include <linux/io.h> - -#include <mach/hardware.h> -#include <asm/system.h> - -#define TX_BUFFERS 15 -#define RX_BUFFERS 25 - -#include "am79c961a.h" - -static irqreturn_t -am79c961_interrupt (int irq, void *dev_id); - -static unsigned int net_debug = NET_DEBUG; - -static const char version[] = - "am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n"; - -/* --------------------------------------------------------------------------- */ - -#ifdef __arm__ -static void write_rreg(u_long base, u_int reg, u_int val) -{ - asm volatile( - "str%?h %1, [%2] @ NET_RAP\n\t" - "str%?h %0, [%2, #-4] @ NET_RDP" - : - : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); -} - -static inline unsigned short read_rreg(u_long base_addr, u_int reg) -{ - unsigned short v; - asm volatile( - "str%?h %1, [%2] @ NET_RAP\n\t" - "ldr%?h %0, [%2, #-4] @ NET_RDP" - : "=r" (v) - : "r" (reg), "r" (ISAIO_BASE + 0x0464)); - return v; -} - -static inline void write_ireg(u_long base, u_int reg, u_int val) -{ - asm volatile( - "str%?h %1, [%2] @ NET_RAP\n\t" - "str%?h %0, [%2, #8] @ NET_IDP" - : - : "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464)); -} - -static inline unsigned short read_ireg(u_long base_addr, u_int reg) -{ - u_short v; - asm volatile( - "str%?h %1, [%2] @ NAT_RAP\n\t" - "ldr%?h %0, [%2, #8] @ NET_IDP\n\t" - : "=r" (v) - : "r" (reg), "r" (ISAIO_BASE + 0x0464)); - return v; -} - -#define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1)) -#define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1)) - -static void -am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) -{ - offset = ISAMEM_BASE + (offset << 1); - length = (length + 1) & ~1; - if ((int)buf & 2) { - asm volatile("str%?h %2, [%0], #4" - : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); - buf += 2; - length -= 2; - } - while (length > 8) { - register unsigned int tmp asm("r2"), tmp2 asm("r3"); - asm volatile( - "ldm%?ia %0!, {%1, %2}" - : "+r" (buf), "=&r" (tmp), "=&r" (tmp2)); - length -= 8; - asm volatile( - "str%?h %1, [%0], #4\n\t" - "mov%? %1, %1, lsr #16\n\t" - "str%?h %1, [%0], #4\n\t" - "str%?h %2, [%0], #4\n\t" - "mov%? %2, %2, lsr #16\n\t" - "str%?h %2, [%0], #4" - : "+r" (offset), "=&r" (tmp), "=&r" (tmp2)); - } - while (length > 0) { - asm volatile("str%?h %2, [%0], #4" - : "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8))); - buf += 2; - length -= 2; - } -} - -static void -am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length) -{ - offset = ISAMEM_BASE + (offset << 1); - length = (length + 1) & ~1; - if ((int)buf & 2) { - unsigned int tmp; - asm volatile( - "ldr%?h %2, [%0], #4\n\t" - "str%?b %2, [%1], #1\n\t" - "mov%? %2, %2, lsr #8\n\t" - "str%?b %2, [%1], #1" - : "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf)); - length -= 2; - } - while (length > 8) { - register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3; - asm volatile( - "ldr%?h %2, [%0], #4\n\t" - "ldr%?h %4, [%0], #4\n\t" - "ldr%?h %3, [%0], #4\n\t" - "orr%? %2, %2, %4, lsl #16\n\t" - "ldr%?h %4, [%0], #4\n\t" - "orr%? %3, %3, %4, lsl #16\n\t" - "stm%?ia %1!, {%2, %3}" - : "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3) - : "0" (offset), "1" (buf)); - length -= 8; - } - while (length > 0) { - unsigned int tmp; - asm volatile( - "ldr%?h %2, [%0], #4\n\t" - "str%?b %2, [%1], #1\n\t" - "mov%? %2, %2, lsr #8\n\t" - "str%?b %2, [%1], #1" - : "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf)); - length -= 2; - } -} -#else -#error Not compatible -#endif - -static int -am79c961_ramtest(struct net_device *dev, unsigned int val) -{ - unsigned char *buffer = kmalloc (65536, GFP_KERNEL); - int i, error = 0, errorcount = 0; - - if (!buffer) - return 0; - memset (buffer, val, 65536); - am_writebuffer(dev, 0, buffer, 65536); - memset (buffer, val ^ 255, 65536); - am_readbuffer(dev, 0, buffer, 65536); - for (i = 0; i < 65536; i++) { - if (buffer[i] != val && !error) { - printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i); - error = 1; - errorcount ++; - } else if (error && buffer[i] == val) { - printk ("%05X\n", i); - error = 0; - } - } - if (error) - printk ("10000\n"); - kfree (buffer); - return errorcount; -} - -static void am79c961_mc_hash(char *addr, u16 *hash) -{ - int idx, bit; - u32 crc; - - crc = ether_crc_le(ETH_ALEN, addr); - - idx = crc >> 30; - bit = (crc >> 26) & 15; - - hash[idx] |= 1 << bit; -} - -static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash) -{ - unsigned int mode = MODE_PORT_10BT; - - if (dev->flags & IFF_PROMISC) { - mode |= MODE_PROMISC; - memset(hash, 0xff, 4 * sizeof(*hash)); - } else if (dev->flags & IFF_ALLMULTI) { - memset(hash, 0xff, 4 * sizeof(*hash)); - } else { - struct netdev_hw_addr *ha; - - memset(hash, 0, 4 * sizeof(*hash)); - - netdev_for_each_mc_addr(ha, dev) - am79c961_mc_hash(ha->addr, hash); - } - - return mode; -} - -static void -am79c961_init_for_open(struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - unsigned long flags; - unsigned char *p; - u_int hdr_addr, first_free_addr; - u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); - int i; - - /* - * Stop the chip. - */ - spin_lock_irqsave(&priv->chip_lock, flags); - write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP); - spin_unlock_irqrestore(&priv->chip_lock, flags); - - write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */ - write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */ - write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */ - write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */ - - for (i = LADRL; i <= LADRH; i++) - write_rreg (dev->base_addr, i, multi_hash[i - LADRL]); - - for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2) - write_rreg (dev->base_addr, i, p[0] | (p[1] << 8)); - - write_rreg (dev->base_addr, MODE, mode); - write_rreg (dev->base_addr, POLLINT, 0); - write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS); - write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS); - - first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16; - hdr_addr = 0; - - priv->rxhead = 0; - priv->rxtail = 0; - priv->rxhdr = hdr_addr; - - for (i = 0; i < RX_BUFFERS; i++) { - priv->rxbuffer[i] = first_free_addr; - am_writeword (dev, hdr_addr, first_free_addr); - am_writeword (dev, hdr_addr + 2, RMD_OWN); - am_writeword (dev, hdr_addr + 4, (-1600)); - am_writeword (dev, hdr_addr + 6, 0); - first_free_addr += 1600; - hdr_addr += 8; - } - priv->txhead = 0; - priv->txtail = 0; - priv->txhdr = hdr_addr; - for (i = 0; i < TX_BUFFERS; i++) { - priv->txbuffer[i] = first_free_addr; - am_writeword (dev, hdr_addr, first_free_addr); - am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP); - am_writeword (dev, hdr_addr + 4, 0xf000); - am_writeword (dev, hdr_addr + 6, 0); - first_free_addr += 1600; - hdr_addr += 8; - } - - write_rreg (dev->base_addr, BASERXL, priv->rxhdr); - write_rreg (dev->base_addr, BASERXH, 0); - write_rreg (dev->base_addr, BASETXL, priv->txhdr); - write_rreg (dev->base_addr, BASERXH, 0); - write_rreg (dev->base_addr, CSR0, CSR0_STOP); - write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO); - write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM); - write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT); -} - -static void am79c961_timer(unsigned long data) -{ - struct net_device *dev = (struct net_device *)data; - struct dev_priv *priv = netdev_priv(dev); - unsigned int lnkstat, carrier; - unsigned long flags; - - spin_lock_irqsave(&priv->chip_lock, flags); - lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST; - spin_unlock_irqrestore(&priv->chip_lock, flags); - carrier = netif_carrier_ok(dev); - - if (lnkstat && !carrier) { - netif_carrier_on(dev); - printk("%s: link up\n", dev->name); - } else if (!lnkstat && carrier) { - netif_carrier_off(dev); - printk("%s: link down\n", dev->name); - } - - mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500)); -} - -/* - * Open/initialize the board. - */ -static int -am79c961_open(struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - int ret; - - ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev); - if (ret) - return ret; - - am79c961_init_for_open(dev); - - netif_carrier_off(dev); - - priv->timer.expires = jiffies; - add_timer(&priv->timer); - - netif_start_queue(dev); - - return 0; -} - -/* - * The inverse routine to am79c961_open(). - */ -static int -am79c961_close(struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - unsigned long flags; - - del_timer_sync(&priv->timer); - - netif_stop_queue(dev); - netif_carrier_off(dev); - - spin_lock_irqsave(&priv->chip_lock, flags); - write_rreg (dev->base_addr, CSR0, CSR0_STOP); - write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); - spin_unlock_irqrestore(&priv->chip_lock, flags); - - free_irq (dev->irq, dev); - - return 0; -} - -/* - * Set or clear promiscuous/multicast mode filter for this adapter. - */ -static void am79c961_setmulticastlist (struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - unsigned long flags; - u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash); - int i, stopped; - - spin_lock_irqsave(&priv->chip_lock, flags); - - stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP; - - if (!stopped) { - /* - * Put the chip into suspend mode - */ - write_rreg(dev->base_addr, CTRL1, CTRL1_SPND); - - /* - * Spin waiting for chip to report suspend mode - */ - while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) { - spin_unlock_irqrestore(&priv->chip_lock, flags); - nop(); - spin_lock_irqsave(&priv->chip_lock, flags); - } - } - - /* - * Update the multicast hash table - */ - for (i = 0; i < ARRAY_SIZE(multi_hash); i++) - write_rreg(dev->base_addr, i + LADRL, multi_hash[i]); - - /* - * Write the mode register - */ - write_rreg(dev->base_addr, MODE, mode); - - if (!stopped) { - /* - * Put the chip back into running mode - */ - write_rreg(dev->base_addr, CTRL1, 0); - } - - spin_unlock_irqrestore(&priv->chip_lock, flags); -} - -static void am79c961_timeout(struct net_device *dev) -{ - printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n", - dev->name); - - /* - * ought to do some setup of the tx side here - */ - - netif_wake_queue(dev); -} - -/* - * Transmit a packet - */ -static int -am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - unsigned int hdraddr, bufaddr; - unsigned int head; - unsigned long flags; - - head = priv->txhead; - hdraddr = priv->txhdr + (head << 3); - bufaddr = priv->txbuffer[head]; - head += 1; - if (head >= TX_BUFFERS) - head = 0; - - am_writebuffer (dev, bufaddr, skb->data, skb->len); - am_writeword (dev, hdraddr + 4, -skb->len); - am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP); - priv->txhead = head; - - spin_lock_irqsave(&priv->chip_lock, flags); - write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA); - spin_unlock_irqrestore(&priv->chip_lock, flags); - - /* - * If the next packet is owned by the ethernet device, - * then the tx ring is full and we can't add another - * packet. - */ - if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN) - netif_stop_queue(dev); - - dev_kfree_skb(skb); - - return NETDEV_TX_OK; -} - -/* - * If we have a good packet(s), get it/them out of the buffers. - */ -static void -am79c961_rx(struct net_device *dev, struct dev_priv *priv) -{ - do { - struct sk_buff *skb; - u_int hdraddr; - u_int pktaddr; - u_int status; - int len; - - hdraddr = priv->rxhdr + (priv->rxtail << 3); - pktaddr = priv->rxbuffer[priv->rxtail]; - - status = am_readword (dev, hdraddr + 2); - if (status & RMD_OWN) /* do we own it? */ - break; - - priv->rxtail ++; - if (priv->rxtail >= RX_BUFFERS) - priv->rxtail = 0; - - if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) { - am_writeword (dev, hdraddr + 2, RMD_OWN); - dev->stats.rx_errors++; - if (status & RMD_ERR) { - if (status & RMD_FRAM) - dev->stats.rx_frame_errors++; - if (status & RMD_CRC) - dev->stats.rx_crc_errors++; - } else if (status & RMD_STP) - dev->stats.rx_length_errors++; - continue; - } - - len = am_readword(dev, hdraddr + 6); - skb = dev_alloc_skb(len + 2); - - if (skb) { - skb_reserve(skb, 2); - - am_readbuffer(dev, pktaddr, skb_put(skb, len), len); - am_writeword(dev, hdraddr + 2, RMD_OWN); - skb->protocol = eth_type_trans(skb, dev); - netif_rx(skb); - dev->stats.rx_bytes += len; - dev->stats.rx_packets++; - } else { - am_writeword (dev, hdraddr + 2, RMD_OWN); - printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name); - dev->stats.rx_dropped++; - break; - } - } while (1); -} - -/* - * Update stats for the transmitted packet - */ -static void -am79c961_tx(struct net_device *dev, struct dev_priv *priv) -{ - do { - short len; - u_int hdraddr; - u_int status; - - hdraddr = priv->txhdr + (priv->txtail << 3); - status = am_readword (dev, hdraddr + 2); - if (status & TMD_OWN) - break; - - priv->txtail ++; - if (priv->txtail >= TX_BUFFERS) - priv->txtail = 0; - - if (status & TMD_ERR) { - u_int status2; - - dev->stats.tx_errors++; - - status2 = am_readword (dev, hdraddr + 6); - - /* - * Clear the error byte - */ - am_writeword (dev, hdraddr + 6, 0); - - if (status2 & TST_RTRY) - dev->stats.collisions += 16; - if (status2 & TST_LCOL) - dev->stats.tx_window_errors++; - if (status2 & TST_LCAR) - dev->stats.tx_carrier_errors++; - if (status2 & TST_UFLO) - dev->stats.tx_fifo_errors++; - continue; - } - dev->stats.tx_packets++; - len = am_readword (dev, hdraddr + 4); - dev->stats.tx_bytes += -len; - } while (priv->txtail != priv->txhead); - - netif_wake_queue(dev); -} - -static irqreturn_t -am79c961_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *)dev_id; - struct dev_priv *priv = netdev_priv(dev); - u_int status, n = 100; - int handled = 0; - - do { - status = read_rreg(dev->base_addr, CSR0); - write_rreg(dev->base_addr, CSR0, status & - (CSR0_IENA|CSR0_TINT|CSR0_RINT| - CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL)); - - if (status & CSR0_RINT) { - handled = 1; - am79c961_rx(dev, priv); - } - if (status & CSR0_TINT) { - handled = 1; - am79c961_tx(dev, priv); - } - if (status & CSR0_MISS) { - handled = 1; - dev->stats.rx_dropped++; - } - if (status & CSR0_CERR) { - handled = 1; - mod_timer(&priv->timer, jiffies); - } - } while (--n && status & (CSR0_RINT | CSR0_TINT)); - - return IRQ_RETVAL(handled); -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -static void am79c961_poll_controller(struct net_device *dev) -{ - unsigned long flags; - local_irq_save(flags); - am79c961_interrupt(dev->irq, dev); - local_irq_restore(flags); -} -#endif - -/* - * Initialise the chip. Note that we always expect - * to be entered with interrupts enabled. - */ -static int -am79c961_hw_init(struct net_device *dev) -{ - struct dev_priv *priv = netdev_priv(dev); - - spin_lock_irq(&priv->chip_lock); - write_rreg (dev->base_addr, CSR0, CSR0_STOP); - write_rreg (dev->base_addr, CSR3, CSR3_MASKALL); - spin_unlock_irq(&priv->chip_lock); - - am79c961_ramtest(dev, 0x66); - am79c961_ramtest(dev, 0x99); - - return 0; -} - -static void __init am79c961_banner(void) -{ - static unsigned version_printed; - - if (net_debug && version_printed++ == 0) - printk(KERN_INFO "%s", version); -} -static const struct net_device_ops am79c961_netdev_ops = { - .ndo_open = am79c961_open, - .ndo_stop = am79c961_close, - .ndo_start_xmit = am79c961_sendpacket, - .ndo_set_multicast_list = am79c961_setmulticastlist, - .ndo_tx_timeout = am79c961_timeout, - .ndo_validate_addr = eth_validate_addr, - .ndo_change_mtu = eth_change_mtu, - .ndo_set_mac_address = eth_mac_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = am79c961_poll_controller, -#endif -}; - -static int __devinit am79c961_probe(struct platform_device *pdev) -{ - struct resource *res; - struct net_device *dev; - struct dev_priv *priv; - int i, ret; - - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (!res) - return -ENODEV; - - dev = alloc_etherdev(sizeof(struct dev_priv)); - ret = -ENOMEM; - if (!dev) - goto out; - - SET_NETDEV_DEV(dev, &pdev->dev); - - priv = netdev_priv(dev); - - /* - * Fixed address and IRQ lines here. - * The PNP initialisation should have been - * done by the ether bootp loader. - */ - dev->base_addr = res->start; - ret = platform_get_irq(pdev, 0); - - if (ret < 0) { - ret = -ENODEV; - goto nodev; - } - dev->irq = ret; - - ret = -ENODEV; - if (!request_region(dev->base_addr, 0x18, dev->name)) - goto nodev; - - /* - * Reset the device. - */ - inb(dev->base_addr + NET_RESET); - udelay(5); - - /* - * Check the manufacturer part of the - * ether address. - */ - if (inb(dev->base_addr) != 0x08 || - inb(dev->base_addr + 2) != 0x00 || - inb(dev->base_addr + 4) != 0x2b) - goto release; - - for (i = 0; i < 6; i++) - dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff; - - am79c961_banner(); - - spin_lock_init(&priv->chip_lock); - init_timer(&priv->timer); - priv->timer.data = (unsigned long)dev; - priv->timer.function = am79c961_timer; - - if (am79c961_hw_init(dev)) - goto release; - - dev->netdev_ops = &am79c961_netdev_ops; - - ret = register_netdev(dev); - if (ret == 0) { - printk(KERN_INFO "%s: ether address %pM\n", - dev->name, dev->dev_addr); - return 0; - } - -release: - release_region(dev->base_addr, 0x18); -nodev: - free_netdev(dev); -out: - return ret; -} - -static struct platform_driver am79c961_driver = { - .probe = am79c961_probe, - .driver = { - .name = "am79c961", - }, -}; - -static int __init am79c961_init(void) -{ - return platform_driver_register(&am79c961_driver); -} - -__initcall(am79c961_init); |