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kernel_samsung_a34x-permissive/drivers/net/ethernet/8390/ax88796.c

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Import A346BXXU1AWB9 kernel source Android 13
2024-04-28 06:49:01 -07:00
/* drivers/net/ethernet/8390/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/interrupt.h>
#include <linux/io.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/mdio-bitbang.h>
#include <linux/phy.h>
#include <linux/eeprom_93cx6.h>
#include <linux/slab.h>
#include <net/ax88796.h>
/* 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_start_xmit ax_ei_start_xmit
#define __ei_tx_timeout ax_ei_tx_timeout
#define __ei_get_stats ax_ei_get_stats
#define __ei_set_multicast_list ax_ei_set_multicast_list
#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 */
#define AX_GPOC_PPDSET BIT(6)
/* device private data */
struct ax_device {
struct mii_bus *mii_bus;
struct mdiobb_ctrl bb_ctrl;
void __iomem *addr_memr;
u8 reg_memr;
int link;
int speed;
int duplex;
void __iomem *map2;
const struct ax_plat_data *plat;
unsigned char running;
unsigned char resume_open;
unsigned int irqflags;
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 whether 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;
netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", jiffies);
ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
ei_local->txing = 0;
ei_local->dmaing = 0;
/* This check _should_not_ be necessary, omit eventually. */
while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
if (time_after(jiffies, reset_start_time + 2 * HZ / 100)) {
netdev_warn(dev, "%s: did not complete.\n", __func__);
break;
}
}
ei_outb(ENISR_RESET, addr + EN0_ISR); /* Ack intr. */
}
/* Wrapper for __ei_interrupt for platforms that have a platform-specific
* way to find out whether the interrupt request might be caused by
* the ax88796 chip.
*/
static irqreturn_t ax_ei_interrupt_filtered(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct ax_device *ax = to_ax_dev(dev);
struct platform_device *pdev = to_platform_device(dev->dev.parent);
if (!ax->plat->check_irq(pdev))
return IRQ_NONE;
return ax_ei_interrupt(irq, dev_id);
}
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_local->dmaing) {
netdev_err(dev, "DMAing conflict in %s "
"[DMAstat:%d][irqlock:%d].\n",
__func__,
ei_local->dmaing, ei_local->irqlock);
return;
}
ei_local->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_local->word16)
ioread16_rep(nic_base + NE_DATAPORT, hdr,
sizeof(struct e8390_pkt_hdr) >> 1);
else
ioread8_rep(nic_base + NE_DATAPORT, hdr,
sizeof(struct e8390_pkt_hdr));
ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_local->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_local->dmaing) {
netdev_err(dev,
"DMAing conflict in %s "
"[DMAstat:%d][irqlock:%d].\n",
__func__,
ei_local->dmaing, ei_local->irqlock);
return;
}
ei_local->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_local->word16) {
ioread16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
if (count & 0x01)
buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
} else {
ioread8_rep(nic_base + NE_DATAPORT, buf, count);
}
ei_local->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_local->word16 && (count & 0x01))
count++;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_local->dmaing) {
netdev_err(dev, "DMAing conflict in %s."
"[DMAstat:%d][irqlock:%d]\n",
__func__,
ei_local->dmaing, ei_local->irqlock);
return;
}
ei_local->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_local->word16)
iowrite16_rep(nic_base + NE_DATAPORT, buf, count >> 1);
else
iowrite8_rep(nic_base + NE_DATAPORT, buf, count);
dma_start = jiffies;
while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
if (time_after(jiffies, dma_start + 2 * HZ / 100)) { /* 20ms */
netdev_warn(dev, "timeout waiting for Tx RDC.\n");
ax_reset_8390(dev);
ax_NS8390_init(dev, 1);
break;
}
}
ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_local->dmaing &= ~0x01;
}
/* definitions for accessing MII/EEPROM interface */
#define AX_MEMR EI_SHIFT(0x14)
#define AX_MEMR_MDC BIT(0)
#define AX_MEMR_MDIR BIT(1)
#define AX_MEMR_MDI BIT(2)
#define AX_MEMR_MDO BIT(3)
#define AX_MEMR_EECS BIT(4)
#define AX_MEMR_EEI BIT(5)
#define AX_MEMR_EEO BIT(6)
#define AX_MEMR_EECLK BIT(7)
static void ax_handle_link_change(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
struct phy_device *phy_dev = dev->phydev;
int status_change = 0;
if (phy_dev->link && ((ax->speed != phy_dev->speed) ||
(ax->duplex != phy_dev->duplex))) {
ax->speed = phy_dev->speed;
ax->duplex = phy_dev->duplex;
status_change = 1;
}
if (phy_dev->link != ax->link) {
if (!phy_dev->link) {
ax->speed = 0;
ax->duplex = -1;
}
ax->link = phy_dev->link;
status_change = 1;
}
if (status_change)
phy_print_status(phy_dev);
}
static int ax_mii_probe(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
struct phy_device *phy_dev = NULL;
int ret;
/* find the first phy */
phy_dev = phy_find_first(ax->mii_bus);
if (!phy_dev) {
netdev_err(dev, "no PHY found\n");
return -ENODEV;
}
ret = phy_connect_direct(dev, phy_dev, ax_handle_link_change,
PHY_INTERFACE_MODE_MII);
if (ret) {
netdev_err(dev, "Could not attach to PHY\n");
return ret;
}
/* mask with MAC supported features */
phy_dev->supported &= PHY_BASIC_FEATURES;
phy_dev->advertising = phy_dev->supported;
netdev_info(dev, "PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
phy_dev->drv->name, phydev_name(phy_dev), phy_dev->irq);
return 0;
}
static void ax_phy_switch(struct net_device *dev, int on)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
u8 reg_gpoc = ax->plat->gpoc_val;
if (!!on)
reg_gpoc &= ~AX_GPOC_PPDSET;
else
reg_gpoc |= AX_GPOC_PPDSET;
ei_outb(reg_gpoc, ei_local->mem + EI_SHIFT(0x17));
}
static void ax_bb_mdc(struct mdiobb_ctrl *ctrl, int level)
{
struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
if (level)
ax->reg_memr |= AX_MEMR_MDC;
else
ax->reg_memr &= ~AX_MEMR_MDC;
ei_outb(ax->reg_memr, ax->addr_memr);
}
static void ax_bb_dir(struct mdiobb_ctrl *ctrl, int output)
{
struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
if (output)
ax->reg_memr &= ~AX_MEMR_MDIR;
else
ax->reg_memr |= AX_MEMR_MDIR;
ei_outb(ax->reg_memr, ax->addr_memr);
}
static void ax_bb_set_data(struct mdiobb_ctrl *ctrl, int value)
{
struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
if (value)
ax->reg_memr |= AX_MEMR_MDO;
else
ax->reg_memr &= ~AX_MEMR_MDO;
ei_outb(ax->reg_memr, ax->addr_memr);
}
static int ax_bb_get_data(struct mdiobb_ctrl *ctrl)
{
struct ax_device *ax = container_of(ctrl, struct ax_device, bb_ctrl);
int reg_memr = ei_inb(ax->addr_memr);
return reg_memr & AX_MEMR_MDI ? 1 : 0;
}
static const struct mdiobb_ops bb_ops = {
.owner = THIS_MODULE,
.set_mdc = ax_bb_mdc,
.set_mdio_dir = ax_bb_dir,
.set_mdio_data = ax_bb_set_data,
.get_mdio_data = ax_bb_get_data,
};
static int ax_mii_init(struct net_device *dev)
{
struct platform_device *pdev = to_platform_device(dev->dev.parent);
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
int err;
ax->bb_ctrl.ops = &bb_ops;
ax->addr_memr = ei_local->mem + AX_MEMR;
ax->mii_bus = alloc_mdio_bitbang(&ax->bb_ctrl);
if (!ax->mii_bus) {
err = -ENOMEM;
goto out;
}
ax->mii_bus->name = "ax88796_mii_bus";
ax->mii_bus->parent = dev->dev.parent;
snprintf(ax->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
pdev->name, pdev->id);
err = mdiobus_register(ax->mii_bus);
if (err)
goto out_free_mdio_bitbang;
return 0;
out_free_mdio_bitbang:
free_mdio_bitbang(ax->mii_bus);
out:
return err;
}
static int ax_open(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
int ret;
netdev_dbg(dev, "open\n");
ret = ax_mii_init(dev);
if (ret)
goto failed_mii;
if (ax->plat->check_irq)
ret = request_irq(dev->irq, ax_ei_interrupt_filtered,
ax->irqflags, dev->name, dev);
else
ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
dev->name, dev);
if (ret)
goto failed_request_irq;
/* turn the phy on (if turned off) */
ax_phy_switch(dev, 1);
ret = ax_mii_probe(dev);
if (ret)
goto failed_mii_probe;
phy_start(dev->phydev);
ret = ax_ei_open(dev);
if (ret)
goto failed_ax_ei_open;
ax->running = 1;
return 0;
failed_ax_ei_open:
phy_disconnect(dev->phydev);
failed_mii_probe:
ax_phy_switch(dev, 0);
free_irq(dev->irq, dev);
failed_request_irq:
/* unregister mdiobus */
mdiobus_unregister(ax->mii_bus);
free_mdio_bitbang(ax->mii_bus);
failed_mii:
return ret;
}
static int ax_close(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
netdev_dbg(dev, "close\n");
ax->running = 0;
wmb();
ax_ei_close(dev);
/* turn the phy off */
ax_phy_switch(dev, 0);
phy_disconnect(dev->phydev);
free_irq(dev->irq, dev);
mdiobus_unregister(ax->mii_bus);
free_mdio_bitbang(ax->mii_bus);
return 0;
}
static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
struct phy_device *phy_dev = dev->phydev;
if (!netif_running(dev))
return -EINVAL;
if (!phy_dev)
return -ENODEV;
return phy_mii_ioctl(phy_dev, req, cmd);
}
/* ethtool ops */
static void ax_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
struct platform_device *pdev = to_platform_device(dev->dev.parent);
strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
strlcpy(info->version, DRV_VERSION, sizeof(info->version));
strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
}
static u32 ax_get_msglevel(struct net_device *dev)
{
struct ei_device *ei_local = netdev_priv(dev);
return ei_local->msg_enable;
}
static void ax_set_msglevel(struct net_device *dev, u32 v)
{
struct ei_device *ei_local = netdev_priv(dev);
ei_local->msg_enable = v;
}
static const struct ethtool_ops ax_ethtool_ops = {
.get_drvinfo = ax_get_drvinfo,
.get_link = ethtool_op_get_link,
.get_ts_info = ethtool_op_get_ts_info,
.get_msglevel = ax_get_msglevel,
.set_msglevel = ax_set_msglevel,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
.set_link_ksettings = phy_ethtool_set_link_ksettings,
};
#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
eeprom->reg_data_in = reg & AX_MEMR_EEI;
eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}
static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
if (eeprom->reg_data_in)
reg |= AX_MEMR_EEI;
if (eeprom->reg_data_clock)
reg |= AX_MEMR_EECLK;
if (eeprom->reg_chip_select)
reg |= AX_MEMR_EECS;
ei_outb(reg, ei_local->mem + AX_MEMR);
udelay(10);
}
#endif
static const struct net_device_ops ax_netdev_ops = {
.ndo_open = ax_open,
.ndo_stop = ax_close,
.ndo_do_ioctl = ax_ioctl,
.ndo_start_xmit = ax_ei_start_xmit,
.ndo_tx_timeout = ax_ei_tx_timeout,
.ndo_get_stats = ax_ei_get_stats,
.ndo_set_rx_mode = ax_ei_set_multicast_list,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = ax_ei_poll,
#endif
};
/* 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)
{
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 (ax->plat->flags & AXFLG_HAS_EEPROM) {
unsigned char SA_prom[32];
ei_outb(6, ioaddr + EN0_RCNTLO);
ei_outb(0, ioaddr + EN0_RCNTHI);
ei_outb(0, ioaddr + EN0_RSARLO);
ei_outb(0, ioaddr + EN0_RSARHI);
ei_outb(E8390_RREAD + E8390_START, ioaddr + NE_CMD);
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);
}
ei_outb(ENISR_RDC, ioaddr + EN0_ISR); /* Ack intr. */
if (ax->plat->wordlength == 2)
for (i = 0; i < 16; i++)
SA_prom[i] = SA_prom[i+i];
memcpy(dev->dev_addr, SA_prom, ETH_ALEN);
}
#ifdef CONFIG_AX88796_93CX6
if (ax->plat->flags & AXFLG_HAS_93CX6) {
unsigned char mac_addr[ETH_ALEN];
struct eeprom_93cx6 eeprom;
eeprom.data = ei_local;
eeprom.register_read = ax_eeprom_register_read;
eeprom.register_write = ax_eeprom_register_write;
eeprom.width = PCI_EEPROM_WIDTH_93C56;
eeprom_93cx6_multiread(&eeprom, 0,
(__le16 __force *)mac_addr,
sizeof(mac_addr) >> 1);
memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
}
#endif
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 (ax->plat->flags & AXFLG_MAC_FROMDEV) {
ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
ei_local->mem + E8390_CMD); /* 0x61 */
for (i = 0; i < ETH_ALEN; i++)
dev->dev_addr[i] =
ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
}
if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
ax->plat->mac_addr)
memcpy(dev->dev_addr, ax->plat->mac_addr, ETH_ALEN);
if (!is_valid_ether_addr(dev->dev_addr)) {
eth_hw_addr_random(dev);
dev_info(&dev->dev, "Using random MAC address: %pM\n",
dev->dev_addr);
}
ax_reset_8390(dev);
ei_local->name = "AX88796";
ei_local->tx_start_page = start_page;
ei_local->stop_page = stop_page;
ei_local->word16 = (ax->plat->wordlength == 2);
ei_local->rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
/* Allow the packet buffer size to be overridden by know-it-alls. */
ei_local->stop_page = ei_local->tx_start_page + PACKETBUF_MEMSIZE;
#endif
ei_local->reset_8390 = &ax_reset_8390;
if (ax->plat->block_input)
ei_local->block_input = ax->plat->block_input;
else
ei_local->block_input = &ax_block_input;
if (ax->plat->block_output)
ei_local->block_output = ax->plat->block_output;
else
ei_local->block_output = &ax_block_output;
ei_local->get_8390_hdr = &ax_get_8390_hdr;
ei_local->priv = 0;
dev->netdev_ops = &ax_netdev_ops;
dev->ethtool_ops = &ax_ethtool_ops;
ax_NS8390_init(dev, 0);
ret = register_netdev(dev);
if (ret)
goto err_out;
netdev_info(dev, "%dbit, irq %d, %lx, MAC: %pM\n",
ei_local->word16 ? 16 : 8, dev->irq, dev->base_addr,
dev->dev_addr);
return 0;
err_out:
return ret;
}
static int ax_remove(struct platform_device *pdev)
{
struct net_device *dev = platform_get_drvdata(pdev);
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
struct resource *mem;
unregister_netdev(dev);
iounmap(ei_local->mem);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
if (ax->map2) {
iounmap(ax->map2);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
release_mem_region(mem->start, resource_size(mem));
}
platform_set_drvdata(pdev, NULL);
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 ei_device *ei_local;
struct ax_device *ax;
struct resource *irq, *mem, *mem2;
unsigned long mem_size, mem2_size = 0;
int ret = 0;
dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
if (dev == NULL)
return -ENOMEM;
/* ok, let's setup our device */
SET_NETDEV_DEV(dev, &pdev->dev);
ei_local = netdev_priv(dev);
ax = to_ax_dev(dev);
ax->plat = dev_get_platdata(&pdev->dev);
platform_set_drvdata(pdev, dev);
ei_local->rxcr_base = ax->plat->rcr_val;
/* find the platform resources */
irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!irq) {
dev_err(&pdev->dev, "no IRQ specified\n");
ret = -ENXIO;
goto exit_mem;
}
dev->irq = irq->start;
ax->irqflags = irq->flags & IRQF_TRIGGER_MASK;
if (irq->flags & IORESOURCE_IRQ_SHAREABLE)
ax->irqflags |= IRQF_SHARED;
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no MEM specified\n");
ret = -ENXIO;
goto exit_mem;
}
mem_size = resource_size(mem);
/*
* setup the register offsets from either the platform data or
* by using the size of the resource provided
*/
if (ax->plat->reg_offsets)
ei_local->reg_offset = ax->plat->reg_offsets;
else {
ei_local->reg_offset = ax->reg_offsets;
for (ret = 0; ret < 0x18; ret++)
ax->reg_offsets[ret] = (mem_size / 0x18) * ret;
}
if (!request_mem_region(mem->start, mem_size, pdev->name)) {
dev_err(&pdev->dev, "cannot reserve registers\n");
ret = -ENXIO;
goto exit_mem;
}
ei_local->mem = ioremap(mem->start, mem_size);
dev->base_addr = (unsigned long)ei_local->mem;
if (ei_local->mem == NULL) {
dev_err(&pdev->dev, "Cannot ioremap area %pR\n", mem);
ret = -ENXIO;
goto exit_req;
}
/* look for reset area */
mem2 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!mem2) {
if (!ax->plat->reg_offsets) {
for (ret = 0; ret < 0x20; ret++)
ax->reg_offsets[ret] = (mem_size / 0x20) * ret;
}
} else {
mem2_size = resource_size(mem2);
if (!request_mem_region(mem2->start, mem2_size, pdev->name)) {
dev_err(&pdev->dev, "cannot reserve registers\n");
ret = -ENXIO;
goto exit_mem1;
}
ax->map2 = ioremap(mem2->start, mem2_size);
if (!ax->map2) {
dev_err(&pdev->dev, "cannot map reset register\n");
ret = -ENXIO;
goto exit_mem2;
}
ei_local->reg_offset[0x1f] = ax->map2 - ei_local->mem;
}
/* got resources, now initialise and register device */
ret = ax_init_dev(dev);
if (!ret)
return 0;
if (!ax->map2)
goto exit_mem1;
iounmap(ax->map2);
exit_mem2:
if (mem2)
release_mem_region(mem2->start, mem2_size);
exit_mem1:
iounmap(ei_local->mem);
exit_req:
release_mem_region(mem->start, mem_size);
exit_mem:
platform_set_drvdata(pdev, NULL);
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",
},
.probe = ax_probe,
.remove = ax_remove,
.suspend = ax_suspend,
.resume = ax_resume,
};
module_platform_driver(axdrv);
MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:ax88796");
Reference in a new issue Copy permalink