+++ /dev/null
-
-/*
- * 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;
-
- 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 " MAC_FMT ", isl38%02x\n",
- wiphy_name(dev->wiphy), MAC_ARG(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);
projects / openwrt / openwrt.git / blobdiff