diff options
Diffstat (limited to 'drivers/net/ax88796.c')
| -rw-r--r-- | drivers/net/ax88796.c | 952 |
1 files changed, 952 insertions, 0 deletions
diff --git a/drivers/net/ax88796.c b/drivers/net/ax88796.c new file mode 100644 index 00000000000..d19874bf070 --- /dev/null +++ b/drivers/net/ax88796.c @@ -0,0 +1,952 @@ +/* drivers/net/ax88796.c + * + * Copyright 2005,2007 Simtec Electronics + * Ben Dooks <ben@simtec.co.uk> + * + * Asix AX88796 10/100 Ethernet controller support + * Based on ne.c, by Donald Becker, et-al. + * + * 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. +*/ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/isapnp.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> + +#include <net/ax88796.h> + +#include <asm/system.h> +#include <asm/io.h> + +static int phy_debug = 0; + +/* Rename the lib8390.c functions to show that they are in this driver */ +#define __ei_open ax_ei_open +#define __ei_close ax_ei_close +#define __ei_poll ax_ei_poll +#define __ei_tx_timeout ax_ei_tx_timeout +#define __ei_interrupt ax_ei_interrupt +#define ____alloc_ei_netdev ax__alloc_ei_netdev +#define __NS8390_init ax_NS8390_init + +/* force unsigned long back to 'void __iomem *' */ +#define ax_convert_addr(_a) ((void __force __iomem *)(_a)) + +#define ei_inb(_a) readb(ax_convert_addr(_a)) +#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a)) + +#define ei_inb_p(_a) ei_inb(_a) +#define ei_outb_p(_v, _a) ei_outb(_v, _a) + +/* define EI_SHIFT() to take into account our register offsets */ +#define EI_SHIFT(x) (ei_local->reg_offset[(x)]) + +/* Ensure we have our RCR base value */ +#define AX88796_PLATFORM + +static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n"; + +#include "lib8390.c" + +#define DRV_NAME "ax88796" +#define DRV_VERSION "1.00" + +/* from ne.c */ +#define NE_CMD EI_SHIFT(0x00) +#define NE_RESET EI_SHIFT(0x1f) +#define NE_DATAPORT EI_SHIFT(0x10) + +#define NE1SM_START_PG 0x20 /* First page of TX buffer */ +#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */ +#define NESM_START_PG 0x40 /* First page of TX buffer */ +#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */ + +/* device private data */ + +struct ax_device { + struct timer_list mii_timer; + spinlock_t mii_lock; + struct mii_if_info mii; + + u32 msg_enable; + void __iomem *map2; + struct platform_device *dev; + struct resource *mem; + struct resource *mem2; + struct ax_plat_data *plat; + + unsigned char running; + unsigned char resume_open; + + u32 reg_offsets[0x20]; +}; + +static inline struct ax_device *to_ax_dev(struct net_device *dev) +{ + struct ei_device *ei_local = netdev_priv(dev); + return (struct ax_device *)(ei_local+1); +} + +/* ax_initial_check + * + * do an initial probe for the card to check wether it exists + * and is functional + */ + +static int ax_initial_check(struct net_device *dev) +{ + struct ei_device *ei_local = netdev_priv(dev); + void __iomem *ioaddr = ei_local->mem; + int reg0; + int regd; + + reg0 = ei_inb(ioaddr); + if (reg0 == 0xFF) + return -ENODEV; + + ei_outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD); + regd = ei_inb(ioaddr + 0x0d); + ei_outb(0xff, ioaddr + 0x0d); + ei_outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD); + ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */ + if (ei_inb(ioaddr + EN0_COUNTER0) != 0) { + ei_outb(reg0, ioaddr); + ei_outb(regd, ioaddr + 0x0d); /* Restore the old values. */ + return -ENODEV; + } + + return 0; +} + +/* Hard reset the card. This used to pause for the same period that a + 8390 reset command required, but that shouldn't be necessary. */ + +static void ax_reset_8390(struct net_device *dev) +{ + struct ei_device *ei_local = netdev_priv(dev); + unsigned long reset_start_time = jiffies; + void __iomem *addr = (void __iomem *)dev->base_addr; + + if (ei_debug > 1) + printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies); + + ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET); + + ei_status.txing = 0; + ei_status.dmaing = 0; + + /* This check _should_not_ be necessary, omit eventually. */ + while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) { + if (jiffies - reset_start_time > 2*HZ/100) { + printk(KERN_WARNING "%s: %s did not complete.\n", + __FUNCTION__, dev->name); + break; + } + } + + ei_outb(ENISR_RESET, addr + EN0_ISR); /* Ack intr. */ +} + + +static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, + int ring_page) +{ + struct ei_device *ei_local = netdev_priv(dev); + void __iomem *nic_base = ei_local->mem; + + /* This *shouldn't* happen. If it does, it's the last thing you'll see */ + if (ei_status.dmaing) { + printk(KERN_EMERG "%s: DMAing conflict in %s [DMAstat:%d][irqlock:%d].\n", + dev->name, __FUNCTION__, + ei_status.dmaing, ei_status.irqlock); + return; + } + + ei_status.dmaing |= 0x01; + ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); + ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO); + ei_outb(0, nic_base + EN0_RCNTHI); + ei_outb(0, nic_base + EN0_RSARLO); /* On page boundary */ + ei_outb(ring_page, nic_base + EN0_RSARHI); + ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD); + + if (ei_status.word16) + readsw(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1); + else + readsb(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)); + + ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ + ei_status.dmaing &= ~0x01; + + le16_to_cpus(&hdr->count); +} + + +/* Block input and output, similar to the Crynwr packet driver. If you + are porting to a new ethercard, look at the packet driver source for hints. + The NEx000 doesn't share the on-board packet memory -- you have to put + the packet out through the "remote DMA" dataport using ei_outb. */ + +static void ax_block_input(struct net_device *dev, int count, + struct sk_buff *skb, int ring_offset) +{ + struct ei_device *ei_local = netdev_priv(dev); + void __iomem *nic_base = ei_local->mem; + char *buf = skb->data; + + if (ei_status.dmaing) { + printk(KERN_EMERG "%s: DMAing conflict in ax_block_input " + "[DMAstat:%d][irqlock:%d].\n", + dev->name, ei_status.dmaing, ei_status.irqlock); + return; + } + + ei_status.dmaing |= 0x01; + + ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD); + ei_outb(count & 0xff, nic_base + EN0_RCNTLO); + ei_outb(count >> 8, nic_base + EN0_RCNTHI); + ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO); + ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI); + ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD); + + if (ei_status.word16) { + readsw(nic_base + NE_DATAPORT, buf, count >> 1); + if (count & 0x01) + buf[count-1] = ei_inb(nic_base + NE_DATAPORT); + + } else { + readsb(nic_base + NE_DATAPORT, buf, count); + } + + ei_status.dmaing &= ~1; +} + +static void ax_block_output(struct net_device *dev, int count, + const unsigned char *buf, const int start_page) +{ + struct ei_device *ei_local = netdev_priv(dev); + void __iomem *nic_base = ei_local->mem; + unsigned long dma_start; + + /* Round the count up for word writes. Do we need to do this? + What effect will an odd byte count have on the 8390? + I should check someday. */ + + if (ei_status.word16 && (count & 0x01)) + count++; + + /* This *shouldn't* happen. If it does, it's the last thing you'll see */ + if (ei_status.dmaing) { + printk(KERN_EMERG "%s: DMAing conflict in %s." + "[DMAstat:%d][irqlock:%d]\n", + dev->name, __FUNCTION__, + ei_status.dmaing, ei_status.irqlock); + return; + } + + ei_status.dmaing |= 0x01; + /* We should already be in page 0, but to be safe... */ + ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD); + + ei_outb(ENISR_RDC, nic_base + EN0_ISR); + + /* Now the normal output. */ + ei_outb(count & 0xff, nic_base + EN0_RCNTLO); + ei_outb(count >> 8, nic_base + EN0_RCNTHI); + ei_outb(0x00, nic_base + EN0_RSARLO); + ei_outb(start_page, nic_base + EN0_RSARHI); + + ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD); + if (ei_status.word16) { + writesw(nic_base + NE_DATAPORT, buf, count>>1); + } else { + writesb(nic_base + NE_DATAPORT, buf, count); + } + + dma_start = jiffies; + + while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) { + if (jiffies - dma_start > 2*HZ/100) { /* 20ms */ + printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name); + ax_reset_8390(dev); + ax_NS8390_init(dev,1); + break; + } + } + + ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */ + ei_status.dmaing &= ~0x01; + return; +} + +/* definitions for accessing MII/EEPROM interface */ + +#define AX_MEMR EI_SHIFT(0x14) +#define AX_MEMR_MDC (1<<0) +#define AX_MEMR_MDIR (1<<1) +#define AX_MEMR_MDI (1<<2) +#define AX_MEMR_MDO (1<<3) +#define AX_MEMR_EECS (1<<4) +#define AX_MEMR_EEI (1<<5) +#define AX_MEMR_EEO (1<<6) +#define AX_MEMR_EECLK (1<<7) + +/* ax_mii_ei_outbits + * + * write the specified set of bits to the phy +*/ + +static void +ax_mii_ei_outbits(struct net_device *dev, unsigned int bits, int len) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR; + unsigned int memr; + + /* clock low, data to output mode */ + memr = ei_inb(memr_addr); + memr &= ~(AX_MEMR_MDC | AX_MEMR_MDIR); + ei_outb(memr, memr_addr); + + for (len--; len >= 0; len--) { + if (bits & (1 << len)) + memr |= AX_MEMR_MDO; + else + memr &= ~AX_MEMR_MDO; + + ei_outb(memr, memr_addr); + + /* clock high */ + + ei_outb(memr | AX_MEMR_MDC, memr_addr); + udelay(1); + + /* clock low */ + ei_outb(memr, memr_addr); + } + + /* leaves the clock line low, mdir input */ + memr |= AX_MEMR_MDIR; + ei_outb(memr, (void __iomem *)dev->base_addr + AX_MEMR); +} + +/* ax_phy_ei_inbits + * + * read a specified number of bits from the phy +*/ + +static unsigned int +ax_phy_ei_inbits(struct net_device *dev, int no) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR; + unsigned int memr; + unsigned int result = 0; + + /* clock low, data to input mode */ + memr = ei_inb(memr_addr); + memr &= ~AX_MEMR_MDC; + memr |= AX_MEMR_MDIR; + ei_outb(memr, memr_addr); + + for (no--; no >= 0; no--) { + ei_outb(memr | AX_MEMR_MDC, memr_addr); + + udelay(1); + + if (ei_inb(memr_addr) & AX_MEMR_MDI) + result |= (1<<no); + + ei_outb(memr, memr_addr); + } + + return result; +} + +/* ax_phy_issueaddr + * + * use the low level bit shifting routines to send the address + * and command to the specified phy +*/ + +static void +ax_phy_issueaddr(struct net_device *dev, int phy_addr, int reg, int opc) +{ + if (phy_debug) + pr_debug("%s: dev %p, %04x, %04x, %d\n", + __FUNCTION__, dev, phy_addr, reg, opc); + + ax_mii_ei_outbits(dev, 0x3f, 6); /* pre-amble */ + ax_mii_ei_outbits(dev, 1, 2); /* frame-start */ + ax_mii_ei_outbits(dev, opc, 2); /* op code */ + ax_mii_ei_outbits(dev, phy_addr, 5); /* phy address */ + ax_mii_ei_outbits(dev, reg, 5); /* reg address */ +} + +static int +ax_phy_read(struct net_device *dev, int phy_addr, int reg) +{ + struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev); + unsigned long flags; + unsigned int result; + + spin_lock_irqsave(&ei_local->page_lock, flags); + + ax_phy_issueaddr(dev, phy_addr, reg, 2); + + result = ax_phy_ei_inbits(dev, 17); + result &= ~(3<<16); + + spin_unlock_irqrestore(&ei_local->page_lock, flags); + + if (phy_debug) + pr_debug("%s: %04x.%04x => read %04x\n", __FUNCTION__, + phy_addr, reg, result); + + return result; +} + +static void +ax_phy_write(struct net_device *dev, int phy_addr, int reg, int value) +{ + struct ei_device *ei = (struct ei_device *) netdev_priv(dev); + unsigned long flags; + + printk(KERN_DEBUG "%s: %p, %04x, %04x %04x\n", + __FUNCTION__, dev, phy_addr, reg, value); + + spin_lock_irqsave(&ei->page_lock, flags); + + ax_phy_issueaddr(dev, phy_addr, reg, 1); + ax_mii_ei_outbits(dev, 2, 2); /* send TA */ + ax_mii_ei_outbits(dev, value, 16); + + spin_unlock_irqrestore(&ei->page_lock, flags); +} + +static void ax_mii_expiry(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct ax_device *ax = to_ax_dev(dev); + unsigned long flags; + + spin_lock_irqsave(&ax->mii_lock, flags); + mii_check_media(&ax->mii, netif_msg_link(ax), 0); + spin_unlock_irqrestore(&ax->mii_lock, flags); + + if (ax->running) { + ax->mii_timer.expires = jiffies + HZ*2; + add_timer(&ax->mii_timer); + } +} + +static int ax_open(struct net_device *dev) +{ + struct ax_device *ax = to_ax_dev(dev); + struct ei_device *ei_local = netdev_priv(dev); + int ret; + + dev_dbg(ax->dev, "%s: open\n", dev->name); + + ret = request_irq(dev->irq, ax_ei_interrupt, 0, dev->name, dev); + if (ret) + return ret; + + ret = ax_ei_open(dev); + if (ret) + return ret; + + /* turn the phy on (if turned off) */ + + ei_outb(ax->plat->gpoc_val, ei_local->mem + EI_SHIFT(0x17)); + ax->running = 1; + + /* start the MII timer */ + + init_timer(&ax->mii_timer); + + ax->mii_timer.expires = jiffies+1; + ax->mii_timer.data = (unsigned long) dev; + ax->mii_timer.function = ax_mii_expiry; + + add_timer(&ax->mii_timer); + + return 0; +} + +static int ax_close(struct net_device *dev) +{ + struct ax_device *ax = to_ax_dev(dev); + struct ei_device *ei_local = netdev_priv(dev); + + dev_dbg(ax->dev, "%s: close\n", dev->name); + + /* turn the phy off */ + + ei_outb(ax->plat->gpoc_val | (1<<6), + ei_local->mem + EI_SHIFT(0x17)); + + ax->running = 0; + wmb(); + + del_timer_sync(&ax->mii_timer); + ax_ei_close(dev); + + free_irq(dev->irq, dev); + return 0; +} + +static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd) +{ + struct ax_device *ax = to_ax_dev(dev); + unsigned long flags; + int rc; + + if (!netif_running(dev)) + return -EINVAL; + + spin_lock_irqsave(&ax->mii_lock, flags); + rc = generic_mii_ioctl(&ax->mii, if_mii(req), cmd, NULL); + spin_unlock_irqrestore(&ax->mii_lock, flags); + + return rc; +} + +/* ethtool ops */ + +static void ax_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + struct ax_device *ax = to_ax_dev(dev); + + strcpy(info->driver, DRV_NAME); + strcpy(info->version, DRV_VERSION); + strcpy(info->bus_info, ax->dev->name); +} + +static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ax_device *ax = to_ax_dev(dev); + unsigned long flags; + + spin_lock_irqsave(&ax->mii_lock, flags); + mii_ethtool_gset(&ax->mii, cmd); + spin_lock_irqsave(&ax->mii_lock, flags); + + return 0; +} + +static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct ax_device *ax = to_ax_dev(dev); + unsigned long flags; + int rc; + + spin_lock_irqsave(&ax->mii_lock, flags); + rc = mii_ethtool_sset(&ax->mii, cmd); + spin_lock_irqsave(&ax->mii_lock, flags); + + return rc; +} + +static int ax_nway_reset(struct net_device *dev) +{ + struct ax_device *ax = to_ax_dev(dev); + return mii_nway_restart(&ax->mii); +} + +static u32 ax_get_link(struct net_device *dev) +{ + struct ax_device *ax = to_ax_dev(dev); + return mii_link_ok(&ax->mii); +} + +static const struct ethtool_ops ax_ethtool_ops = { + .get_drvinfo = ax_get_drvinfo, + .get_settings = ax_get_settings, + .set_settings = ax_set_settings, + .nway_reset = ax_nway_reset, + .get_link = ax_get_link, + .get_perm_addr = ethtool_op_get_perm_addr, +}; + +/* setup code */ + +static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local) +{ + void __iomem *ioaddr = ei_local->mem; + struct ax_device *ax = to_ax_dev(dev); + + /* Select page 0*/ + ei_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr + E8390_CMD); + + /* set to byte access */ + ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG); + ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17)); +} + +/* ax_init_dev + * + * initialise the specified device, taking care to note the MAC + * address it may already have (if configured), ensure + * the device is ready to be used by lib8390.c and registerd with + * the network layer. + */ + +static int ax_init_dev(struct net_device *dev, int first_init) +{ + struct ei_device *ei_local = netdev_priv(dev); + struct ax_device *ax = to_ax_dev(dev); + void __iomem *ioaddr = ei_local->mem; + unsigned int start_page; + unsigned int stop_page; + int ret; + int i; + + ret = ax_initial_check(dev); + if (ret) + goto err_out; + + /* setup goes here */ + + ax_initial_setup(dev, ei_local); + + /* read the mac from the card prom if we need it */ + + if (first_init && ax->plat->flags & AXFLG_HAS_EEPROM) { + unsigned char SA_prom[32]; + + for(i = 0; i < sizeof(SA_prom); i+=2) { + SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT); + SA_prom[i+1] = ei_inb(ioaddr + NE_DATAPORT); + } + + if (ax->plat->wordlength == 2) + for (i = 0; i < 16; i++) + SA_prom[i] = SA_prom[i+i]; + + memcpy(dev->dev_addr, SA_prom, 6); + } + + if (ax->plat->wordlength == 2) { + /* We must set the 8390 for word mode. */ + ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG); + start_page = NESM_START_PG; + stop_page = NESM_STOP_PG; + } else { + start_page = NE1SM_START_PG; + stop_page = NE1SM_STOP_PG; + } + + /* load the mac-address from the device if this is the + * first time we've initialised */ + + if (first_init && ax->plat->flags & AXFLG_MAC_FROMDEV) { + ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP, + ei_local->mem + E8390_CMD); /* 0x61 */ + + for (i = 0 ; i < ETHER_ADDR_LEN ; i++) + dev->dev_addr[i] = ei_inb(ioaddr + EN1_PHYS_SHIFT(i)); + } + + ax_reset_8390(dev); + + ei_status.name = "AX88796"; + ei_status.tx_start_page = start_page; + ei_status.stop_page = stop_page; + ei_status.word16 = (ax->plat->wordlength == 2); + ei_status.rx_start_page = start_page + TX_PAGES; + +#ifdef PACKETBUF_MEMSIZE + /* Allow the packet buffer size to be overridden by know-it-alls. */ + ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE; +#endif + + ei_status.reset_8390 = &ax_reset_8390; + ei_status.block_input = &ax_block_input; + ei_status.block_output = &ax_block_output; + ei_status.get_8390_hdr = &ax_get_8390_hdr; + ei_status.priv = 0; + + dev->open = ax_open; + dev->stop = ax_close; + dev->do_ioctl = ax_ioctl; + dev->ethtool_ops = &ax_ethtool_ops; + + ax->msg_enable = NETIF_MSG_LINK; + ax->mii.phy_id_mask = 0x1f; + ax->mii.reg_num_mask = 0x1f; + ax->mii.phy_id = 0x10; /* onboard phy */ + ax->mii.force_media = 0; + ax->mii.full_duplex = 0; + ax->mii.mdio_read = ax_phy_read; + ax->mii.mdio_write = ax_phy_write; + ax->mii.dev = dev; + +#ifdef CONFIG_NET_POLL_CONTROLLER + dev->poll_controller = ax_ei_poll; +#endif + ax_NS8390_init(dev, 0); + + if (first_init) { + printk("AX88796: %dbit, irq %d, %lx, MAC: ", + ei_status.word16 ? 16:8, dev->irq, dev->base_addr); + + for (i = 0; i < ETHER_ADDR_LEN; i++) + printk("%2.2x%c", dev->dev_addr[i], + (i < (ETHER_ADDR_LEN-1) ? ':' : ' ')); + + printk("\n"); + } + + ret = register_netdev(dev); + if (ret) + goto out_irq; + + return 0; + + out_irq: + /* cleanup irq */ + free_irq(dev->irq, dev); + err_out: + return ret; +} + +static int ax_remove(struct platform_device *_dev) +{ + struct net_device *dev = platform_get_drvdata(_dev); + struct ax_device *ax; + + ax = to_ax_dev(dev); + + unregister_netdev(dev); + free_irq(dev->irq, dev); + + iounmap(ei_status.mem); + release_resource(ax->mem); + kfree(ax->mem); + + if (ax->map2) { + iounmap(ax->map2); + release_resource(ax->mem2); + kfree(ax->mem2); + } + + free_netdev(dev); + + return 0; +} + +/* ax_probe + * + * This is the entry point when the platform device system uses to + * notify us of a new device to attach to. Allocate memory, find + * the resources and information passed, and map the necessary registers. +*/ + +static int ax_probe(struct platform_device *pdev) +{ + struct net_device *dev; + struct ax_device *ax; + struct resource *res; + size_t size; + int ret; + + dev = ax__alloc_ei_netdev(sizeof(struct ax_device)); + if (dev == NULL) + return -ENOMEM; + + /* ok, let's setup our device */ + ax = to_ax_dev(dev); + + memset(ax, 0, sizeof(struct ax_device)); + + spin_lock_init(&ax->mii_lock); + + ax->dev = pdev; + ax->plat = pdev->dev.platform_data; + platform_set_drvdata(pdev, dev); + + ei_status.rxcr_base = ax->plat->rcr_val; + + /* find the platform resources */ + + dev->irq = platform_get_irq(pdev, 0); + if (dev->irq < 0) { + dev_err(&pdev->dev, "no IRQ specified\n"); + ret = -ENXIO; + goto exit_mem; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no MEM specified\n"); + ret = -ENXIO; + goto exit_mem; + } + + size = (res->end - res->start) + 1; + + /* setup the register offsets from either the platform data + * or by using the size of the resource provided */ + + if (ax->plat->reg_offsets) + ei_status.reg_offset = ax->plat->reg_offsets; + else { + ei_status.reg_offset = ax->reg_offsets; + for (ret = 0; ret < 0x18; ret++) + ax->reg_offsets[ret] = (size / 0x18) * ret; + } + + ax->mem = request_mem_region(res->start, size, pdev->name); + if (ax->mem == NULL) { + dev_err(&pdev->dev, "cannot reserve registers\n"); + ret = -ENXIO; + goto exit_mem; + } + + ei_status.mem = ioremap(res->start, size); + dev->base_addr = (long)ei_status.mem; + + if (ei_status.mem == NULL) { + dev_err(&pdev->dev, "Cannot ioremap area (%08zx,%08zx)\n", + res->start, res->end); + + ret = -ENXIO; + goto exit_req; + } + + /* look for reset area */ + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res == NULL) { + if (!ax->plat->reg_offsets) { + for (ret = 0; ret < 0x20; ret++) + ax->reg_offsets[ret] = (size / 0x20) * ret; + } + + ax->map2 = NULL; + } else { + size = (res->end - res->start) + 1; + + ax->mem2 = request_mem_region(res->start, size, pdev->name); + if (ax->mem == NULL) { + dev_err(&pdev->dev, "cannot reserve registers\n"); + ret = -ENXIO; + goto exit_mem1; + } + + ax->map2 = ioremap(res->start, size); + if (ax->map2 == NULL) { + dev_err(&pdev->dev, "cannot map reset register"); + ret = -ENXIO; + goto exit_mem2; + } + + ei_status.reg_offset[0x1f] = ax->map2 - ei_status.mem; + } + + /* got resources, now initialise and register device */ + + ret = ax_init_dev(dev, 1); + if (!ret) + return 0; + + if (ax->map2 == NULL) + goto exit_mem1; + + iounmap(ax->map2); + + exit_mem2: + release_resource(ax->mem2); + kfree(ax->mem2); + + exit_mem1: + iounmap(ei_status.mem); + + exit_req: + release_resource(ax->mem); + kfree(ax->mem); + + exit_mem: + free_netdev(dev); + + return ret; +} + +/* suspend and resume */ + +#ifdef CONFIG_PM +static int ax_suspend(struct platform_device *dev, pm_message_t state) +{ + struct net_device *ndev = platform_get_drvdata(dev); + struct ax_device *ax = to_ax_dev(ndev); + + ax->resume_open = ax->running; + + netif_device_detach(ndev); + ax_close(ndev); + + return 0; +} + +static int ax_resume(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + struct ax_device *ax = to_ax_dev(ndev); + + ax_initial_setup(ndev, netdev_priv(ndev)); + ax_NS8390_init(ndev, ax->resume_open); + netif_device_attach(ndev); + + if (ax->resume_open) + ax_open(ndev); + + return 0; +} + +#else +#define ax_suspend NULL +#define ax_resume NULL +#endif + +static struct platform_driver axdrv = { + .driver = { + .name = "ax88796", + .owner = THIS_MODULE, + }, + .probe = ax_probe, + .remove = ax_remove, + .suspend = ax_suspend, + .resume = ax_resume, +}; + +static int __init axdrv_init(void) +{ + return platform_driver_register(&axdrv); +} + +static void __exit axdrv_exit(void) +{ + platform_driver_unregister(&axdrv); +} + +module_init(axdrv_init); +module_exit(axdrv_exit); + +MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver"); +MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>"); +MODULE_LICENSE("GPL v2"); |