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linux/drivers/net/wireless/p54pci.c
Johannes Berg a289755250 [MAC80211]: add "invalid" interface type 
Since I cannot convince the lazy driver authors (hello Michael)
to stop (ab)using the MGMT interface type internally in their
drivers, this patch introduces a new _INVALID type especially
for their use and changes all affected drivers to use it.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-10 16:54:15 -07:00

692 lines
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/*
* Linux device driver for PCI based Prism54
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
*
* Based on the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jean-baptiste.note@m4x.org>, 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/init.h>
#include <linux/pci.h>
#include <linux/firmware.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/completion.h>
#include <net/mac80211.h>
#include "p54.h"
#include "p54pci.h"
MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_DESCRIPTION("Prism54 PCI wireless driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("prism54pci");
static struct pci_device_id p54p_table[] __devinitdata = {
/* Intersil PRISM Duette/Prism GT Wireless LAN adapter */
{ PCI_DEVICE(0x1260, 0x3890) },
/* 3COM 3CRWE154G72 Wireless LAN adapter */
{ PCI_DEVICE(0x10b7, 0x6001) },
/* Intersil PRISM Indigo Wireless LAN adapter */
{ PCI_DEVICE(0x1260, 0x3877) },
/* Intersil PRISM Javelin/Xbow Wireless LAN adapter */
{ PCI_DEVICE(0x1260, 0x3886) },
{ },
};
MODULE_DEVICE_TABLE(pci, p54p_table);
static int p54p_upload_firmware(struct ieee80211_hw *dev)
{
struct p54p_priv *priv = dev->priv;
const struct firmware *fw_entry = NULL;
__le32 reg;
int err;
u32 *data;
u32 remains, left, device_addr;
P54P_WRITE(int_enable, 0);
P54P_READ(int_enable);
udelay(10);
reg = P54P_READ(ctrl_stat);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT);
P54P_WRITE(ctrl_stat, reg);
P54P_READ(ctrl_stat);
udelay(10);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
P54P_WRITE(ctrl_stat, reg);
wmb();
udelay(10);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
P54P_WRITE(ctrl_stat, reg);
wmb();
mdelay(50);
err = request_firmware(&fw_entry, "isl3886", &priv->pdev->dev);
if (err) {
printk(KERN_ERR "%s (prism54pci): cannot find firmware "
"(isl3886)\n", pci_name(priv->pdev));
return err;
}
p54_parse_firmware(dev, fw_entry);
data = (u32 *) fw_entry->data;
remains = fw_entry->size;
device_addr = ISL38XX_DEV_FIRMWARE_ADDR;
while (remains) {
u32 i = 0;
left = min((u32)0x1000, remains);
P54P_WRITE(direct_mem_base, cpu_to_le32(device_addr));
P54P_READ(int_enable);
device_addr += 0x1000;
while (i < left) {
P54P_WRITE(direct_mem_win[i], *data++);
i += sizeof(u32);
}
remains -= left;
P54P_READ(int_enable);
}
release_firmware(fw_entry);
reg = P54P_READ(ctrl_stat);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT);
P54P_WRITE(ctrl_stat, reg);
P54P_READ(ctrl_stat);
udelay(10);
reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET);
P54P_WRITE(ctrl_stat, reg);
wmb();
udelay(10);
reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET);
P54P_WRITE(ctrl_stat, reg);
wmb();
udelay(10);
return 0;
}
static irqreturn_t p54p_simple_interrupt(int irq, void *dev_id)
{
struct p54p_priv *priv = (struct p54p_priv *) dev_id;
__le32 reg;
reg = P54P_READ(int_ident);
P54P_WRITE(int_ack, reg);
if (reg & P54P_READ(int_enable))
complete(&priv->boot_comp);
return IRQ_HANDLED;
}
static int p54p_read_eeprom(struct ieee80211_hw *dev)
{
struct p54p_priv *priv = dev->priv;
int err;
struct p54_control_hdr *hdr;
void *eeprom;
dma_addr_t rx_mapping, tx_mapping;
u16 alen;
init_completion(&priv->boot_comp);
err = request_irq(priv->pdev->irq, &p54p_simple_interrupt,
IRQF_SHARED, "prism54pci", priv);
if (err) {
printk(KERN_ERR "%s (prism54pci): failed to register IRQ handler\n",
pci_name(priv->pdev));
return err;
}
eeprom = kmalloc(0x2010 + EEPROM_READBACK_LEN, GFP_KERNEL);
if (!eeprom) {
printk(KERN_ERR "%s (prism54pci): no memory for eeprom!\n",
pci_name(priv->pdev));
err = -ENOMEM;
goto out;
}
memset(priv->ring_control, 0, sizeof(*priv->ring_control));
P54P_WRITE(ring_control_base, priv->ring_control_dma);
P54P_READ(ring_control_base);
udelay(10);
P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT));
P54P_READ(int_enable);
udelay(10);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
if (!wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ)) {
printk(KERN_ERR "%s (prism54pci): Cannot boot firmware!\n",
pci_name(priv->pdev));
err = -EINVAL;
goto out;
}
P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE));
P54P_READ(int_enable);
hdr = eeprom + 0x2010;
p54_fill_eeprom_readback(hdr);
hdr->req_id = cpu_to_le32(priv->common.rx_start);
rx_mapping = pci_map_single(priv->pdev, eeprom,
0x2010, PCI_DMA_FROMDEVICE);
tx_mapping = pci_map_single(priv->pdev, (void *)hdr,
EEPROM_READBACK_LEN, PCI_DMA_TODEVICE);
priv->ring_control->rx_mgmt[0].host_addr = cpu_to_le32(rx_mapping);
priv->ring_control->rx_mgmt[0].len = cpu_to_le16(0x2010);
priv->ring_control->tx_data[0].host_addr = cpu_to_le32(tx_mapping);
priv->ring_control->tx_data[0].device_addr = hdr->req_id;
priv->ring_control->tx_data[0].len = cpu_to_le16(EEPROM_READBACK_LEN);
priv->ring_control->host_idx[2] = cpu_to_le32(1);
priv->ring_control->host_idx[1] = cpu_to_le32(1);
wmb();
mdelay(100);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ);
wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ);
pci_unmap_single(priv->pdev, tx_mapping,
EEPROM_READBACK_LEN, PCI_DMA_TODEVICE);
pci_unmap_single(priv->pdev, rx_mapping,
0x2010, PCI_DMA_FROMDEVICE);
alen = le16_to_cpu(priv->ring_control->rx_mgmt[0].len);
if (le32_to_cpu(priv->ring_control->device_idx[2]) != 1 ||
alen < 0x10) {
printk(KERN_ERR "%s (prism54pci): Cannot read eeprom!\n",
pci_name(priv->pdev));
err = -EINVAL;
goto out;
}
p54_parse_eeprom(dev, (u8 *)eeprom + 0x10, alen - 0x10);
out:
kfree(eeprom);
P54P_WRITE(int_enable, 0);
P54P_READ(int_enable);
udelay(10);
free_irq(priv->pdev->irq, priv);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
return err;
}
static void p54p_refill_rx_ring(struct ieee80211_hw *dev)
{
struct p54p_priv *priv = dev->priv;
u32 limit, host_idx, idx;
host_idx = le32_to_cpu(priv->ring_control->host_idx[0]);
limit = host_idx;
limit -= le32_to_cpu(priv->ring_control->device_idx[0]);
limit = ARRAY_SIZE(priv->ring_control->rx_data) - limit;
idx = host_idx % ARRAY_SIZE(priv->ring_control->rx_data);
while (limit-- > 1) {
struct p54p_desc *desc = &priv->ring_control->rx_data[idx];
if (!desc->host_addr) {
struct sk_buff *skb;
dma_addr_t mapping;
skb = dev_alloc_skb(MAX_RX_SIZE);
if (!skb)
break;
mapping = pci_map_single(priv->pdev,
skb_tail_pointer(skb),
MAX_RX_SIZE,
PCI_DMA_FROMDEVICE);
desc->host_addr = cpu_to_le32(mapping);
desc->device_addr = 0; // FIXME: necessary?
desc->len = cpu_to_le16(MAX_RX_SIZE);
desc->flags = 0;
priv->rx_buf[idx] = skb;
}
idx++;
host_idx++;
idx %= ARRAY_SIZE(priv->ring_control->rx_data);
}
wmb();
priv->ring_control->host_idx[0] = cpu_to_le32(host_idx);
}
static irqreturn_t p54p_interrupt(int irq, void *dev_id)
{
struct ieee80211_hw *dev = dev_id;
struct p54p_priv *priv = dev->priv;
__le32 reg;
spin_lock(&priv->lock);
reg = P54P_READ(int_ident);
if (unlikely(reg == 0xFFFFFFFF)) {
spin_unlock(&priv->lock);
return IRQ_HANDLED;
}
P54P_WRITE(int_ack, reg);
reg &= P54P_READ(int_enable);
if (reg & cpu_to_le32(ISL38XX_INT_IDENT_UPDATE)) {
struct p54p_desc *desc;
u32 idx, i;
i = priv->tx_idx;
i %= ARRAY_SIZE(priv->ring_control->tx_data);
priv->tx_idx = idx = le32_to_cpu(priv->ring_control->device_idx[1]);
idx %= ARRAY_SIZE(priv->ring_control->tx_data);
while (i != idx) {
desc = &priv->ring_control->tx_data[i];
if (priv->tx_buf[i]) {
kfree(priv->tx_buf[i]);
priv->tx_buf[i] = NULL;
}
pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr),
le16_to_cpu(desc->len), PCI_DMA_TODEVICE);
desc->host_addr = 0;
desc->device_addr = 0;
desc->len = 0;
desc->flags = 0;
i++;
i %= ARRAY_SIZE(priv->ring_control->tx_data);
}
i = priv->rx_idx;
i %= ARRAY_SIZE(priv->ring_control->rx_data);
priv->rx_idx = idx = le32_to_cpu(priv->ring_control->device_idx[0]);
idx %= ARRAY_SIZE(priv->ring_control->rx_data);
while (i != idx) {
u16 len;
struct sk_buff *skb;
desc = &priv->ring_control->rx_data[i];
len = le16_to_cpu(desc->len);
skb = priv->rx_buf[i];
skb_put(skb, len);
if (p54_rx(dev, skb)) {
pci_unmap_single(priv->pdev,
le32_to_cpu(desc->host_addr),
MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
priv->rx_buf[i] = NULL;
desc->host_addr = 0;
} else {
skb_trim(skb, 0);
desc->len = cpu_to_le16(MAX_RX_SIZE);
}
i++;
i %= ARRAY_SIZE(priv->ring_control->rx_data);
}
p54p_refill_rx_ring(dev);
wmb();
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
} else if (reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT))
complete(&priv->boot_comp);
spin_unlock(&priv->lock);
return reg ? IRQ_HANDLED : IRQ_NONE;
}
static void p54p_tx(struct ieee80211_hw *dev, struct p54_control_hdr *data,
size_t len, int free_on_tx)
{
struct p54p_priv *priv = dev->priv;
unsigned long flags;
struct p54p_desc *desc;
dma_addr_t mapping;
u32 device_idx, idx, i;
spin_lock_irqsave(&priv->lock, flags);
device_idx = le32_to_cpu(priv->ring_control->device_idx[1]);
idx = le32_to_cpu(priv->ring_control->host_idx[1]);
i = idx % ARRAY_SIZE(priv->ring_control->tx_data);
mapping = pci_map_single(priv->pdev, data, len, PCI_DMA_TODEVICE);
desc = &priv->ring_control->tx_data[i];
desc->host_addr = cpu_to_le32(mapping);
desc->device_addr = data->req_id;
desc->len = cpu_to_le16(len);
desc->flags = 0;
wmb();
priv->ring_control->host_idx[1] = cpu_to_le32(idx + 1);
if (free_on_tx)
priv->tx_buf[i] = data;
spin_unlock_irqrestore(&priv->lock, flags);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
P54P_READ(dev_int);
/* FIXME: unlikely to happen because the device usually runs out of
memory before we fill the ring up, but we can make it impossible */
if (idx - device_idx > ARRAY_SIZE(priv->ring_control->tx_data) - 2)
printk(KERN_INFO "%s: tx overflow.\n", wiphy_name(dev->wiphy));
}
static int p54p_open(struct ieee80211_hw *dev)
{
struct p54p_priv *priv = dev->priv;
int err;
init_completion(&priv->boot_comp);
err = request_irq(priv->pdev->irq, &p54p_interrupt,
IRQF_SHARED, "prism54pci", dev);
if (err) {
printk(KERN_ERR "%s: failed to register IRQ handler\n",
wiphy_name(dev->wiphy));
return err;
}
memset(priv->ring_control, 0, sizeof(*priv->ring_control));
priv->rx_idx = priv->tx_idx = 0;
p54p_refill_rx_ring(dev);
p54p_upload_firmware(dev);
P54P_WRITE(ring_control_base, priv->ring_control_dma);
P54P_READ(ring_control_base);
wmb();
udelay(10);
P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT));
P54P_READ(int_enable);
wmb();
udelay(10);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
P54P_READ(dev_int);
if (!wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ)) {
printk(KERN_ERR "%s: Cannot boot firmware!\n",
wiphy_name(dev->wiphy));
free_irq(priv->pdev->irq, dev);
return -ETIMEDOUT;
}
P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE));
P54P_READ(int_enable);
wmb();
udelay(10);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
P54P_READ(dev_int);
wmb();
udelay(10);
return 0;
}
static void p54p_stop(struct ieee80211_hw *dev)
{
struct p54p_priv *priv = dev->priv;
unsigned int i;
struct p54p_desc *desc;
P54P_WRITE(int_enable, 0);
P54P_READ(int_enable);
udelay(10);
free_irq(priv->pdev->irq, dev);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
for (i = 0; i < ARRAY_SIZE(priv->rx_buf); i++) {
desc = &priv->ring_control->rx_data[i];
if (desc->host_addr)
pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr),
MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
kfree_skb(priv->rx_buf[i]);
priv->rx_buf[i] = NULL;
}
for (i = 0; i < ARRAY_SIZE(priv->tx_buf); i++) {
desc = &priv->ring_control->tx_data[i];
if (desc->host_addr)
pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr),
le16_to_cpu(desc->len), PCI_DMA_TODEVICE);
kfree(priv->tx_buf[i]);
priv->tx_buf[i] = NULL;
}
memset(priv->ring_control, 0, sizeof(*priv->ring_control));
}
static int __devinit p54p_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct p54p_priv *priv;
struct ieee80211_hw *dev;
unsigned long mem_addr, mem_len;
int err;
DECLARE_MAC_BUF(mac);
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR "%s (prism54pci): Cannot enable new PCI device\n",
pci_name(pdev));
return err;
}
mem_addr = pci_resource_start(pdev, 0);
mem_len = pci_resource_len(pdev, 0);
if (mem_len < sizeof(struct p54p_csr)) {
printk(KERN_ERR "%s (prism54pci): Too short PCI resources\n",
pci_name(pdev));
pci_disable_device(pdev);
return err;
}
err = pci_request_regions(pdev, "prism54pci");
if (err) {
printk(KERN_ERR "%s (prism54pci): Cannot obtain PCI resources\n",
pci_name(pdev));
return err;
}
if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) ||
pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) {
printk(KERN_ERR "%s (prism54pci): No suitable DMA available\n",
pci_name(pdev));
goto err_free_reg;
}
pci_set_master(pdev);
pci_try_set_mwi(pdev);
pci_write_config_byte(pdev, 0x40, 0);
pci_write_config_byte(pdev, 0x41, 0);
dev = p54_init_common(sizeof(*priv));
if (!dev) {
printk(KERN_ERR "%s (prism54pci): ieee80211 alloc failed\n",
pci_name(pdev));
err = -ENOMEM;
goto err_free_reg;
}
priv = dev->priv;
priv->pdev = pdev;
SET_IEEE80211_DEV(dev, &pdev->dev);
pci_set_drvdata(pdev, dev);
priv->map = ioremap(mem_addr, mem_len);
if (!priv->map) {
printk(KERN_ERR "%s (prism54pci): Cannot map device memory\n",
pci_name(pdev));
err = -EINVAL; // TODO: use a better error code?
goto err_free_dev;
}
priv->ring_control = pci_alloc_consistent(pdev, sizeof(*priv->ring_control),
&priv->ring_control_dma);
if (!priv->ring_control) {
printk(KERN_ERR "%s (prism54pci): Cannot allocate rings\n",
pci_name(pdev));
err = -ENOMEM;
goto err_iounmap;
}
memset(priv->ring_control, 0, sizeof(*priv->ring_control));
err = p54p_upload_firmware(dev);
if (err)
goto err_free_desc;
err = p54p_read_eeprom(dev);
if (err)
goto err_free_desc;
priv->common.open = p54p_open;
priv->common.stop = p54p_stop;
priv->common.tx = p54p_tx;
spin_lock_init(&priv->lock);
err = ieee80211_register_hw(dev);
if (err) {
printk(KERN_ERR "%s (prism54pci): Cannot register netdevice\n",
pci_name(pdev));
goto err_free_common;
}
printk(KERN_INFO "%s: hwaddr %s, isl38%02x\n",
wiphy_name(dev->wiphy),
print_mac(mac, dev->wiphy->perm_addr),
priv->common.version);
return 0;
err_free_common:
p54_free_common(dev);
err_free_desc:
pci_free_consistent(pdev, sizeof(*priv->ring_control),
priv->ring_control, priv->ring_control_dma);
err_iounmap:
iounmap(priv->map);
err_free_dev:
pci_set_drvdata(pdev, NULL);
ieee80211_free_hw(dev);
err_free_reg:
pci_release_regions(pdev);
pci_disable_device(pdev);
return err;
}
static void __devexit p54p_remove(struct pci_dev *pdev)
{
struct ieee80211_hw *dev = pci_get_drvdata(pdev);
struct p54p_priv *priv;
if (!dev)
return;
ieee80211_unregister_hw(dev);
priv = dev->priv;
pci_free_consistent(pdev, sizeof(*priv->ring_control),
priv->ring_control, priv->ring_control_dma);
p54_free_common(dev);
iounmap(priv->map);
pci_release_regions(pdev);
pci_disable_device(pdev);
ieee80211_free_hw(dev);
}
#ifdef CONFIG_PM
static int p54p_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct ieee80211_hw *dev = pci_get_drvdata(pdev);
struct p54p_priv *priv = dev->priv;
if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) {
ieee80211_stop_queues(dev);
p54p_stop(dev);
}
pci_save_state(pdev);
pci_set_power_state(pdev, pci_choose_state(pdev, state));
return 0;
}
static int p54p_resume(struct pci_dev *pdev)
{
struct ieee80211_hw *dev = pci_get_drvdata(pdev);
struct p54p_priv *priv = dev->priv;
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) {
p54p_open(dev);
ieee80211_start_queues(dev);
}
return 0;
}
#endif /* CONFIG_PM */
static struct pci_driver p54p_driver = {
.name = "prism54pci",
.id_table = p54p_table,
.probe = p54p_probe,
.remove = __devexit_p(p54p_remove),
#ifdef CONFIG_PM
.suspend = p54p_suspend,
.resume = p54p_resume,
#endif /* CONFIG_PM */
};
static int __init p54p_init(void)
{
return pci_register_driver(&p54p_driver);
}
static void __exit p54p_exit(void)
{
pci_unregister_driver(&p54p_driver);
}
module_init(p54p_init);
module_exit(p54p_exit);
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