* Linux device driver for PCI based Prism54
*
* Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
+ * Copyright (c) 2008, Christian Lamparter <chunkeey@web.de>
*
* Based on the islsm (softmac prism54) driver, which is:
* Copyright 2004-2006 Jean-Baptiste Note <jean-baptiste.note@m4x.org>, et al.
err = request_firmware(&fw_entry, "isl3886", &priv->pdev->dev);
if (err) {
- printk(KERN_ERR "%s (prism54pci): cannot find firmware "
+ printk(KERN_ERR "%s (p54pci): cannot find firmware "
"(isl3886)\n", pci_name(priv->pdev));
return err;
}
- p54_parse_firmware(dev, fw_entry);
+ err = p54_parse_firmware(dev, fw_entry);
+ if (err) {
+ release_firmware(fw_entry);
+ return err;
+ }
data = (__le32 *) fw_entry->data;
remains = fw_entry->size;
init_completion(&priv->boot_comp);
err = request_irq(priv->pdev->irq, &p54p_simple_interrupt,
- IRQF_SHARED, "prism54pci", priv);
+ IRQF_SHARED, "p54pci", priv);
if (err) {
- printk(KERN_ERR "%s (prism54pci): failed to register IRQ handler\n",
+ printk(KERN_ERR "%s (p54pci): 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",
+ printk(KERN_ERR "%s (p54pci): no memory for eeprom!\n",
pci_name(priv->pdev));
err = -ENOMEM;
goto out;
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",
+ printk(KERN_ERR "%s (p54pci): Cannot boot firmware!\n",
pci_name(priv->pdev));
err = -EINVAL;
goto out;
alen = le16_to_cpu(ring_control->rx_mgmt[0].len);
if (le32_to_cpu(ring_control->device_idx[2]) != 1 ||
alen < 0x10) {
- printk(KERN_ERR "%s (prism54pci): Cannot read eeprom!\n",
+ printk(KERN_ERR "%s (p54pci): Cannot read eeprom!\n",
pci_name(priv->pdev));
err = -EINVAL;
goto out;
return err;
}
-static void p54p_refill_rx_ring(struct ieee80211_hw *dev)
+static void p54p_refill_rx_ring(struct ieee80211_hw *dev,
+ int ring_index, struct p54p_desc *ring, u32 ring_limit,
+ struct sk_buff **rx_buf)
{
struct p54p_priv *priv = dev->priv;
struct p54p_ring_control *ring_control = priv->ring_control;
- u32 limit, host_idx, idx;
+ u32 limit, idx, i;
- host_idx = le32_to_cpu(ring_control->host_idx[0]);
- limit = host_idx;
- limit -= le32_to_cpu(ring_control->device_idx[0]);
- limit = ARRAY_SIZE(ring_control->rx_data) - limit;
+ idx = le32_to_cpu(ring_control->host_idx[ring_index]);
+ limit = idx;
+ limit -= le32_to_cpu(ring_control->device_idx[ring_index]);
+ limit = ring_limit - limit;
- idx = host_idx % ARRAY_SIZE(ring_control->rx_data);
+ i = idx % ring_limit;
while (limit-- > 1) {
- struct p54p_desc *desc = &ring_control->rx_data[idx];
+ struct p54p_desc *desc = &ring[i];
if (!desc->host_addr) {
struct sk_buff *skb;
dma_addr_t mapping;
- skb = dev_alloc_skb(MAX_RX_SIZE);
+ skb = dev_alloc_skb(priv->common.rx_mtu + 32);
if (!skb)
break;
mapping = pci_map_single(priv->pdev,
skb_tail_pointer(skb),
- MAX_RX_SIZE,
+ priv->common.rx_mtu + 32,
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->len = cpu_to_le16(priv->common.rx_mtu + 32);
desc->flags = 0;
- priv->rx_buf[idx] = skb;
+ rx_buf[i] = skb;
}
+ i++;
idx++;
- host_idx++;
- idx %= ARRAY_SIZE(ring_control->rx_data);
+ i %= ring_limit;
}
wmb();
- ring_control->host_idx[0] = cpu_to_le32(host_idx);
+ ring_control->host_idx[ring_index] = cpu_to_le32(idx);
+}
+
+static void p54p_check_rx_ring(struct ieee80211_hw *dev, u32 *index,
+ int ring_index, struct p54p_desc *ring, u32 ring_limit,
+ struct sk_buff **rx_buf)
+{
+ struct p54p_priv *priv = dev->priv;
+ struct p54p_ring_control *ring_control = priv->ring_control;
+ struct p54p_desc *desc;
+ u32 idx, i;
+
+ i = (*index) % ring_limit;
+ (*index) = idx = le32_to_cpu(ring_control->device_idx[ring_index]);
+ idx %= ring_limit;
+ while (i != idx) {
+ u16 len;
+ struct sk_buff *skb;
+ desc = &ring[i];
+ len = le16_to_cpu(desc->len);
+ skb = rx_buf[i];
+
+ if (!skb) {
+ i++;
+ i %= ring_limit;
+ continue;
+ }
+ skb_put(skb, len);
+
+ if (p54_rx(dev, skb)) {
+ pci_unmap_single(priv->pdev,
+ le32_to_cpu(desc->host_addr),
+ priv->common.rx_mtu + 32,
+ PCI_DMA_FROMDEVICE);
+ rx_buf[i] = NULL;
+ desc->host_addr = 0;
+ } else {
+ skb_trim(skb, 0);
+ desc->len = cpu_to_le16(priv->common.rx_mtu + 32);
+ }
+
+ i++;
+ i %= ring_limit;
+ }
+
+ p54p_refill_rx_ring(dev, ring_index, ring, ring_limit, rx_buf);
+}
+
+/* caller must hold priv->lock */
+static void p54p_check_tx_ring(struct ieee80211_hw *dev, u32 *index,
+ int ring_index, struct p54p_desc *ring, u32 ring_limit,
+ void **tx_buf)
+{
+ struct p54p_priv *priv = dev->priv;
+ struct p54p_ring_control *ring_control = priv->ring_control;
+ struct p54p_desc *desc;
+ u32 idx, i;
+
+ i = (*index) % ring_limit;
+ (*index) = idx = le32_to_cpu(ring_control->device_idx[1]);
+ idx %= ring_limit;
+
+ while (i != idx) {
+ desc = &ring[i];
+ kfree(tx_buf[i]);
+ 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 %= ring_limit;
+ }
+}
+
+static void p54p_rx_tasklet(unsigned long dev_id)
+{
+ struct ieee80211_hw *dev = (struct ieee80211_hw *)dev_id;
+ struct p54p_priv *priv = dev->priv;
+ struct p54p_ring_control *ring_control = priv->ring_control;
+
+ p54p_check_rx_ring(dev, &priv->rx_idx_mgmt, 2, ring_control->rx_mgmt,
+ ARRAY_SIZE(ring_control->rx_mgmt), priv->rx_buf_mgmt);
+
+ p54p_check_rx_ring(dev, &priv->rx_idx_data, 0, ring_control->rx_data,
+ ARRAY_SIZE(ring_control->rx_data), priv->rx_buf_data);
+
+ wmb();
+ P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE));
}
static irqreturn_t p54p_interrupt(int irq, void *dev_id)
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(ring_control->tx_data);
- priv->tx_idx = idx = le32_to_cpu(ring_control->device_idx[1]);
- idx %= ARRAY_SIZE(ring_control->tx_data);
-
- while (i != idx) {
- desc = &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(ring_control->tx_data);
- }
-
- i = priv->rx_idx;
- i %= ARRAY_SIZE(ring_control->rx_data);
- priv->rx_idx = idx = le32_to_cpu(ring_control->device_idx[0]);
- idx %= ARRAY_SIZE(ring_control->rx_data);
- while (i != idx) {
- u16 len;
- struct sk_buff *skb;
- desc = &ring_control->rx_data[i];
- len = le16_to_cpu(desc->len);
- skb = priv->rx_buf[i];
-
- skb_put(skb, len);
+ p54p_check_tx_ring(dev, &priv->tx_idx_mgmt,
+ 3, ring_control->tx_mgmt,
+ ARRAY_SIZE(ring_control->tx_mgmt),
+ priv->tx_buf_mgmt);
- if (p54_rx(dev, skb)) {
- pci_unmap_single(priv->pdev,
- le32_to_cpu(desc->host_addr),
- MAX_RX_SIZE, PCI_DMA_FROMDEVICE);
+ p54p_check_tx_ring(dev, &priv->tx_idx_data,
+ 1, ring_control->tx_data,
+ ARRAY_SIZE(ring_control->tx_data),
+ priv->tx_buf_data);
- priv->rx_buf[i] = NULL;
- desc->host_addr = 0;
- } else {
- skb_trim(skb, 0);
- desc->len = cpu_to_le16(MAX_RX_SIZE);
- }
+ tasklet_schedule(&priv->rx_tasklet);
- i++;
- i %= ARRAY_SIZE(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);
ring_control->host_idx[1] = cpu_to_le32(idx + 1);
if (free_on_tx)
- priv->tx_buf[i] = data;
+ priv->tx_buf_data[i] = data;
spin_unlock_irqrestore(&priv->lock, flags);
init_completion(&priv->boot_comp);
err = request_irq(priv->pdev->irq, &p54p_interrupt,
- IRQF_SHARED, "prism54pci", dev);
+ IRQF_SHARED, "p54pci", dev);
if (err) {
printk(KERN_ERR "%s: failed to register IRQ handler\n",
wiphy_name(dev->wiphy));
}
memset(priv->ring_control, 0, sizeof(*priv->ring_control));
- priv->rx_idx = priv->tx_idx = 0;
- p54p_refill_rx_ring(dev);
+ priv->rx_idx_data = priv->tx_idx_data = 0;
+ priv->rx_idx_mgmt = priv->tx_idx_mgmt = 0;
+
+ p54p_refill_rx_ring(dev, 0, priv->ring_control->rx_data,
+ ARRAY_SIZE(priv->ring_control->rx_data), priv->rx_buf_data);
+
+ p54p_refill_rx_ring(dev, 2, priv->ring_control->rx_mgmt,
+ ARRAY_SIZE(priv->ring_control->rx_mgmt), priv->rx_buf_mgmt);
p54p_upload_firmware(dev);
unsigned int i;
struct p54p_desc *desc;
+ tasklet_kill(&priv->rx_tasklet);
+
P54P_WRITE(int_enable, cpu_to_le32(0));
P54P_READ(int_enable);
udelay(10);
P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET));
- for (i = 0; i < ARRAY_SIZE(priv->rx_buf); i++) {
+ for (i = 0; i < ARRAY_SIZE(priv->rx_buf_data); i++) {
desc = &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;
+ pci_unmap_single(priv->pdev,
+ le32_to_cpu(desc->host_addr),
+ priv->common.rx_mtu + 32,
+ PCI_DMA_FROMDEVICE);
+ kfree_skb(priv->rx_buf_data[i]);
+ priv->rx_buf_data[i] = NULL;
}
- for (i = 0; i < ARRAY_SIZE(priv->tx_buf); i++) {
+ for (i = 0; i < ARRAY_SIZE(priv->rx_buf_mgmt); i++) {
+ desc = &ring_control->rx_mgmt[i];
+ if (desc->host_addr)
+ pci_unmap_single(priv->pdev,
+ le32_to_cpu(desc->host_addr),
+ priv->common.rx_mtu + 32,
+ PCI_DMA_FROMDEVICE);
+ kfree_skb(priv->rx_buf_mgmt[i]);
+ priv->rx_buf_mgmt[i] = NULL;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(priv->tx_buf_data); i++) {
desc = &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);
+ 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;
+ kfree(priv->tx_buf_data[i]);
+ priv->tx_buf_data[i] = NULL;
}
- memset(ring_control, 0, sizeof(ring_control));
+ for (i = 0; i < ARRAY_SIZE(priv->tx_buf_mgmt); i++) {
+ desc = &ring_control->tx_mgmt[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_mgmt[i]);
+ priv->tx_buf_mgmt[i] = NULL;
+ }
+
+ memset(ring_control, 0, sizeof(*ring_control));
}
static int __devinit p54p_probe(struct pci_dev *pdev,
err = pci_enable_device(pdev);
if (err) {
- printk(KERN_ERR "%s (prism54pci): Cannot enable new PCI device\n",
+ printk(KERN_ERR "%s (p54pci): 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",
+ printk(KERN_ERR "%s (p54pci): Too short PCI resources\n",
pci_name(pdev));
pci_disable_device(pdev);
return err;
}
- err = pci_request_regions(pdev, "prism54pci");
+ err = pci_request_regions(pdev, "p54pci");
if (err) {
- printk(KERN_ERR "%s (prism54pci): Cannot obtain PCI resources\n",
+ printk(KERN_ERR "%s (p54pci): 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",
+ printk(KERN_ERR "%s (p54pci): No suitable DMA available\n",
pci_name(pdev));
goto err_free_reg;
}
dev = p54_init_common(sizeof(*priv));
if (!dev) {
- printk(KERN_ERR "%s (prism54pci): ieee80211 alloc failed\n",
+ printk(KERN_ERR "%s (p54pci): ieee80211 alloc failed\n",
pci_name(pdev));
err = -ENOMEM;
goto err_free_reg;
priv->map = ioremap(mem_addr, mem_len);
if (!priv->map) {
- printk(KERN_ERR "%s (prism54pci): Cannot map device memory\n",
+ printk(KERN_ERR "%s (p54pci): 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",
+ printk(KERN_ERR "%s (p54pci): Cannot allocate rings\n",
pci_name(pdev));
err = -ENOMEM;
goto err_iounmap;
priv->common.tx = p54p_tx;
spin_lock_init(&priv->lock);
+ tasklet_init(&priv->rx_tasklet, p54p_rx_tasklet, (unsigned long)dev);
err = ieee80211_register_hw(dev);
if (err) {
- printk(KERN_ERR "%s (prism54pci): Cannot register netdevice\n",
+ printk(KERN_ERR "%s (p54pci): Cannot register netdevice\n",
pci_name(pdev));
goto err_free_common;
}
if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) {
p54p_open(dev);
- ieee80211_start_queues(dev);
+ ieee80211_wake_queues(dev);
}
return 0;
#endif /* CONFIG_PM */
static struct pci_driver p54p_driver = {
- .name = "prism54pci",
+ .name = "p54pci",
.id_table = p54p_table,
.probe = p54p_probe,
.remove = __devexit_p(p54p_remove),
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff