Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Linux device driver for PCI based Prism54 |
| 4 | * |
| 5 | * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net> |
| 6 | * |
| 7 | * Based on the islsm (softmac prism54) driver, which is: |
| 8 | * Copyright 2004-2006 Jean-Baptiste Note <jean-baptiste.note@m4x.org>, et al. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/pci.h> |
| 17 | #include <linux/firmware.h> |
| 18 | #include <linux/etherdevice.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/completion.h> |
| 21 | #include <net/mac80211.h> |
| 22 | |
| 23 | #include "p54.h" |
| 24 | #include "p54pci.h" |
| 25 | |
| 26 | MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>"); |
| 27 | MODULE_DESCRIPTION("Prism54 PCI wireless driver"); |
| 28 | MODULE_LICENSE("GPL"); |
| 29 | MODULE_ALIAS("prism54pci"); |
| 30 | |
| 31 | static struct pci_device_id p54p_table[] __devinitdata = { |
| 32 | /* Intersil PRISM Duette/Prism GT Wireless LAN adapter */ |
| 33 | { PCI_DEVICE(0x1260, 0x3890) }, |
| 34 | /* 3COM 3CRWE154G72 Wireless LAN adapter */ |
| 35 | { PCI_DEVICE(0x10b7, 0x6001) }, |
| 36 | /* Intersil PRISM Indigo Wireless LAN adapter */ |
| 37 | { PCI_DEVICE(0x1260, 0x3877) }, |
| 38 | /* Intersil PRISM Javelin/Xbow Wireless LAN adapter */ |
| 39 | { PCI_DEVICE(0x1260, 0x3886) }, |
Andrew Morton | 90f4dd0 | 2007-09-16 15:08:37 -0700 | [diff] [blame] | 40 | { }, |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 41 | }; |
| 42 | |
| 43 | MODULE_DEVICE_TABLE(pci, p54p_table); |
| 44 | |
| 45 | static int p54p_upload_firmware(struct ieee80211_hw *dev) |
| 46 | { |
| 47 | struct p54p_priv *priv = dev->priv; |
| 48 | const struct firmware *fw_entry = NULL; |
| 49 | __le32 reg; |
| 50 | int err; |
| 51 | u32 *data; |
| 52 | u32 remains, left, device_addr; |
| 53 | |
| 54 | P54P_WRITE(int_enable, 0); |
| 55 | P54P_READ(int_enable); |
| 56 | udelay(10); |
| 57 | |
| 58 | reg = P54P_READ(ctrl_stat); |
| 59 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET); |
| 60 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RAMBOOT); |
| 61 | P54P_WRITE(ctrl_stat, reg); |
| 62 | P54P_READ(ctrl_stat); |
| 63 | udelay(10); |
| 64 | |
| 65 | reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET); |
| 66 | P54P_WRITE(ctrl_stat, reg); |
| 67 | wmb(); |
| 68 | udelay(10); |
| 69 | |
| 70 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET); |
| 71 | P54P_WRITE(ctrl_stat, reg); |
| 72 | wmb(); |
| 73 | |
| 74 | mdelay(50); |
| 75 | |
| 76 | err = request_firmware(&fw_entry, "isl3886", &priv->pdev->dev); |
| 77 | if (err) { |
| 78 | printk(KERN_ERR "%s (prism54pci): cannot find firmware " |
| 79 | "(isl3886)\n", pci_name(priv->pdev)); |
| 80 | return err; |
| 81 | } |
| 82 | |
| 83 | p54_parse_firmware(dev, fw_entry); |
| 84 | |
| 85 | data = (u32 *) fw_entry->data; |
| 86 | remains = fw_entry->size; |
| 87 | device_addr = ISL38XX_DEV_FIRMWARE_ADDR; |
| 88 | while (remains) { |
| 89 | u32 i = 0; |
| 90 | left = min((u32)0x1000, remains); |
| 91 | P54P_WRITE(direct_mem_base, cpu_to_le32(device_addr)); |
| 92 | P54P_READ(int_enable); |
| 93 | |
| 94 | device_addr += 0x1000; |
| 95 | while (i < left) { |
| 96 | P54P_WRITE(direct_mem_win[i], *data++); |
| 97 | i += sizeof(u32); |
| 98 | } |
| 99 | |
| 100 | remains -= left; |
| 101 | P54P_READ(int_enable); |
| 102 | } |
| 103 | |
| 104 | release_firmware(fw_entry); |
| 105 | |
| 106 | reg = P54P_READ(ctrl_stat); |
| 107 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_CLKRUN); |
| 108 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET); |
| 109 | reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RAMBOOT); |
| 110 | P54P_WRITE(ctrl_stat, reg); |
| 111 | P54P_READ(ctrl_stat); |
| 112 | udelay(10); |
| 113 | |
| 114 | reg |= cpu_to_le32(ISL38XX_CTRL_STAT_RESET); |
| 115 | P54P_WRITE(ctrl_stat, reg); |
| 116 | wmb(); |
| 117 | udelay(10); |
| 118 | |
| 119 | reg &= cpu_to_le32(~ISL38XX_CTRL_STAT_RESET); |
| 120 | P54P_WRITE(ctrl_stat, reg); |
| 121 | wmb(); |
| 122 | udelay(10); |
| 123 | |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | static irqreturn_t p54p_simple_interrupt(int irq, void *dev_id) |
| 128 | { |
| 129 | struct p54p_priv *priv = (struct p54p_priv *) dev_id; |
| 130 | __le32 reg; |
| 131 | |
| 132 | reg = P54P_READ(int_ident); |
| 133 | P54P_WRITE(int_ack, reg); |
| 134 | |
| 135 | if (reg & P54P_READ(int_enable)) |
| 136 | complete(&priv->boot_comp); |
| 137 | |
| 138 | return IRQ_HANDLED; |
| 139 | } |
| 140 | |
| 141 | static int p54p_read_eeprom(struct ieee80211_hw *dev) |
| 142 | { |
| 143 | struct p54p_priv *priv = dev->priv; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 144 | struct p54p_ring_control *ring_control = priv->ring_control; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 145 | int err; |
| 146 | struct p54_control_hdr *hdr; |
| 147 | void *eeprom; |
| 148 | dma_addr_t rx_mapping, tx_mapping; |
| 149 | u16 alen; |
| 150 | |
| 151 | init_completion(&priv->boot_comp); |
| 152 | err = request_irq(priv->pdev->irq, &p54p_simple_interrupt, |
| 153 | IRQF_SHARED, "prism54pci", priv); |
| 154 | if (err) { |
| 155 | printk(KERN_ERR "%s (prism54pci): failed to register IRQ handler\n", |
| 156 | pci_name(priv->pdev)); |
| 157 | return err; |
| 158 | } |
| 159 | |
| 160 | eeprom = kmalloc(0x2010 + EEPROM_READBACK_LEN, GFP_KERNEL); |
| 161 | if (!eeprom) { |
| 162 | printk(KERN_ERR "%s (prism54pci): no memory for eeprom!\n", |
| 163 | pci_name(priv->pdev)); |
| 164 | err = -ENOMEM; |
| 165 | goto out; |
| 166 | } |
| 167 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 168 | memset(ring_control, 0, sizeof(*ring_control)); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 169 | P54P_WRITE(ring_control_base, priv->ring_control_dma); |
| 170 | P54P_READ(ring_control_base); |
| 171 | udelay(10); |
| 172 | |
| 173 | P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT)); |
| 174 | P54P_READ(int_enable); |
| 175 | udelay(10); |
| 176 | |
| 177 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET)); |
| 178 | |
| 179 | if (!wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ)) { |
| 180 | printk(KERN_ERR "%s (prism54pci): Cannot boot firmware!\n", |
| 181 | pci_name(priv->pdev)); |
| 182 | err = -EINVAL; |
| 183 | goto out; |
| 184 | } |
| 185 | |
| 186 | P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE)); |
| 187 | P54P_READ(int_enable); |
| 188 | |
| 189 | hdr = eeprom + 0x2010; |
| 190 | p54_fill_eeprom_readback(hdr); |
| 191 | hdr->req_id = cpu_to_le32(priv->common.rx_start); |
| 192 | |
| 193 | rx_mapping = pci_map_single(priv->pdev, eeprom, |
| 194 | 0x2010, PCI_DMA_FROMDEVICE); |
| 195 | tx_mapping = pci_map_single(priv->pdev, (void *)hdr, |
| 196 | EEPROM_READBACK_LEN, PCI_DMA_TODEVICE); |
| 197 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 198 | ring_control->rx_mgmt[0].host_addr = cpu_to_le32(rx_mapping); |
| 199 | ring_control->rx_mgmt[0].len = cpu_to_le16(0x2010); |
| 200 | ring_control->tx_data[0].host_addr = cpu_to_le32(tx_mapping); |
| 201 | ring_control->tx_data[0].device_addr = hdr->req_id; |
| 202 | ring_control->tx_data[0].len = cpu_to_le16(EEPROM_READBACK_LEN); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 203 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 204 | ring_control->host_idx[2] = cpu_to_le32(1); |
| 205 | ring_control->host_idx[1] = cpu_to_le32(1); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 206 | |
| 207 | wmb(); |
| 208 | mdelay(100); |
| 209 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE)); |
| 210 | |
| 211 | wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ); |
| 212 | wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ); |
| 213 | |
| 214 | pci_unmap_single(priv->pdev, tx_mapping, |
| 215 | EEPROM_READBACK_LEN, PCI_DMA_TODEVICE); |
| 216 | pci_unmap_single(priv->pdev, rx_mapping, |
| 217 | 0x2010, PCI_DMA_FROMDEVICE); |
| 218 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 219 | alen = le16_to_cpu(ring_control->rx_mgmt[0].len); |
| 220 | if (le32_to_cpu(ring_control->device_idx[2]) != 1 || |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 221 | alen < 0x10) { |
| 222 | printk(KERN_ERR "%s (prism54pci): Cannot read eeprom!\n", |
| 223 | pci_name(priv->pdev)); |
| 224 | err = -EINVAL; |
| 225 | goto out; |
| 226 | } |
| 227 | |
| 228 | p54_parse_eeprom(dev, (u8 *)eeprom + 0x10, alen - 0x10); |
| 229 | |
| 230 | out: |
| 231 | kfree(eeprom); |
| 232 | P54P_WRITE(int_enable, 0); |
| 233 | P54P_READ(int_enable); |
| 234 | udelay(10); |
| 235 | free_irq(priv->pdev->irq, priv); |
| 236 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET)); |
| 237 | return err; |
| 238 | } |
| 239 | |
| 240 | static void p54p_refill_rx_ring(struct ieee80211_hw *dev) |
| 241 | { |
| 242 | struct p54p_priv *priv = dev->priv; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 243 | struct p54p_ring_control *ring_control = priv->ring_control; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 244 | u32 limit, host_idx, idx; |
| 245 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 246 | host_idx = le32_to_cpu(ring_control->host_idx[0]); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 247 | limit = host_idx; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 248 | limit -= le32_to_cpu(ring_control->device_idx[0]); |
| 249 | limit = ARRAY_SIZE(ring_control->rx_data) - limit; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 250 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 251 | idx = host_idx % ARRAY_SIZE(ring_control->rx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 252 | while (limit-- > 1) { |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 253 | struct p54p_desc *desc = &ring_control->rx_data[idx]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 254 | |
| 255 | if (!desc->host_addr) { |
| 256 | struct sk_buff *skb; |
| 257 | dma_addr_t mapping; |
| 258 | skb = dev_alloc_skb(MAX_RX_SIZE); |
| 259 | if (!skb) |
| 260 | break; |
| 261 | |
| 262 | mapping = pci_map_single(priv->pdev, |
| 263 | skb_tail_pointer(skb), |
| 264 | MAX_RX_SIZE, |
| 265 | PCI_DMA_FROMDEVICE); |
| 266 | desc->host_addr = cpu_to_le32(mapping); |
| 267 | desc->device_addr = 0; // FIXME: necessary? |
| 268 | desc->len = cpu_to_le16(MAX_RX_SIZE); |
| 269 | desc->flags = 0; |
| 270 | priv->rx_buf[idx] = skb; |
| 271 | } |
| 272 | |
| 273 | idx++; |
| 274 | host_idx++; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 275 | idx %= ARRAY_SIZE(ring_control->rx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | wmb(); |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 279 | ring_control->host_idx[0] = cpu_to_le32(host_idx); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | static irqreturn_t p54p_interrupt(int irq, void *dev_id) |
| 283 | { |
| 284 | struct ieee80211_hw *dev = dev_id; |
| 285 | struct p54p_priv *priv = dev->priv; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 286 | struct p54p_ring_control *ring_control = priv->ring_control; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 287 | __le32 reg; |
| 288 | |
| 289 | spin_lock(&priv->lock); |
| 290 | reg = P54P_READ(int_ident); |
| 291 | if (unlikely(reg == 0xFFFFFFFF)) { |
| 292 | spin_unlock(&priv->lock); |
| 293 | return IRQ_HANDLED; |
| 294 | } |
| 295 | |
| 296 | P54P_WRITE(int_ack, reg); |
| 297 | |
| 298 | reg &= P54P_READ(int_enable); |
| 299 | |
| 300 | if (reg & cpu_to_le32(ISL38XX_INT_IDENT_UPDATE)) { |
| 301 | struct p54p_desc *desc; |
| 302 | u32 idx, i; |
| 303 | i = priv->tx_idx; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 304 | i %= ARRAY_SIZE(ring_control->tx_data); |
| 305 | priv->tx_idx = idx = le32_to_cpu(ring_control->device_idx[1]); |
| 306 | idx %= ARRAY_SIZE(ring_control->tx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 307 | |
| 308 | while (i != idx) { |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 309 | desc = &ring_control->tx_data[i]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 310 | if (priv->tx_buf[i]) { |
| 311 | kfree(priv->tx_buf[i]); |
| 312 | priv->tx_buf[i] = NULL; |
| 313 | } |
| 314 | |
| 315 | pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr), |
| 316 | le16_to_cpu(desc->len), PCI_DMA_TODEVICE); |
| 317 | |
| 318 | desc->host_addr = 0; |
| 319 | desc->device_addr = 0; |
| 320 | desc->len = 0; |
| 321 | desc->flags = 0; |
| 322 | |
| 323 | i++; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 324 | i %= ARRAY_SIZE(ring_control->tx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | i = priv->rx_idx; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 328 | i %= ARRAY_SIZE(ring_control->rx_data); |
| 329 | priv->rx_idx = idx = le32_to_cpu(ring_control->device_idx[0]); |
| 330 | idx %= ARRAY_SIZE(ring_control->rx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 331 | while (i != idx) { |
| 332 | u16 len; |
| 333 | struct sk_buff *skb; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 334 | desc = &ring_control->rx_data[i]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 335 | len = le16_to_cpu(desc->len); |
| 336 | skb = priv->rx_buf[i]; |
| 337 | |
| 338 | skb_put(skb, len); |
| 339 | |
| 340 | if (p54_rx(dev, skb)) { |
| 341 | pci_unmap_single(priv->pdev, |
| 342 | le32_to_cpu(desc->host_addr), |
| 343 | MAX_RX_SIZE, PCI_DMA_FROMDEVICE); |
| 344 | |
| 345 | priv->rx_buf[i] = NULL; |
| 346 | desc->host_addr = 0; |
| 347 | } else { |
| 348 | skb_trim(skb, 0); |
| 349 | desc->len = cpu_to_le16(MAX_RX_SIZE); |
| 350 | } |
| 351 | |
| 352 | i++; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 353 | i %= ARRAY_SIZE(ring_control->rx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 354 | } |
| 355 | |
| 356 | p54p_refill_rx_ring(dev); |
| 357 | |
| 358 | wmb(); |
| 359 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE)); |
| 360 | } else if (reg & cpu_to_le32(ISL38XX_INT_IDENT_INIT)) |
| 361 | complete(&priv->boot_comp); |
| 362 | |
| 363 | spin_unlock(&priv->lock); |
| 364 | |
| 365 | return reg ? IRQ_HANDLED : IRQ_NONE; |
| 366 | } |
| 367 | |
| 368 | static void p54p_tx(struct ieee80211_hw *dev, struct p54_control_hdr *data, |
| 369 | size_t len, int free_on_tx) |
| 370 | { |
| 371 | struct p54p_priv *priv = dev->priv; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 372 | struct p54p_ring_control *ring_control = priv->ring_control; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 373 | unsigned long flags; |
| 374 | struct p54p_desc *desc; |
| 375 | dma_addr_t mapping; |
| 376 | u32 device_idx, idx, i; |
| 377 | |
| 378 | spin_lock_irqsave(&priv->lock, flags); |
| 379 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 380 | device_idx = le32_to_cpu(ring_control->device_idx[1]); |
| 381 | idx = le32_to_cpu(ring_control->host_idx[1]); |
| 382 | i = idx % ARRAY_SIZE(ring_control->tx_data); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 383 | |
| 384 | mapping = pci_map_single(priv->pdev, data, len, PCI_DMA_TODEVICE); |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 385 | desc = &ring_control->tx_data[i]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 386 | desc->host_addr = cpu_to_le32(mapping); |
| 387 | desc->device_addr = data->req_id; |
| 388 | desc->len = cpu_to_le16(len); |
| 389 | desc->flags = 0; |
| 390 | |
| 391 | wmb(); |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 392 | ring_control->host_idx[1] = cpu_to_le32(idx + 1); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 393 | |
| 394 | if (free_on_tx) |
| 395 | priv->tx_buf[i] = data; |
| 396 | |
| 397 | spin_unlock_irqrestore(&priv->lock, flags); |
| 398 | |
| 399 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE)); |
| 400 | P54P_READ(dev_int); |
| 401 | |
| 402 | /* FIXME: unlikely to happen because the device usually runs out of |
| 403 | memory before we fill the ring up, but we can make it impossible */ |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 404 | if (idx - device_idx > ARRAY_SIZE(ring_control->tx_data) - 2) |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 405 | printk(KERN_INFO "%s: tx overflow.\n", wiphy_name(dev->wiphy)); |
| 406 | } |
| 407 | |
| 408 | static int p54p_open(struct ieee80211_hw *dev) |
| 409 | { |
| 410 | struct p54p_priv *priv = dev->priv; |
| 411 | int err; |
| 412 | |
| 413 | init_completion(&priv->boot_comp); |
| 414 | err = request_irq(priv->pdev->irq, &p54p_interrupt, |
| 415 | IRQF_SHARED, "prism54pci", dev); |
| 416 | if (err) { |
| 417 | printk(KERN_ERR "%s: failed to register IRQ handler\n", |
| 418 | wiphy_name(dev->wiphy)); |
| 419 | return err; |
| 420 | } |
| 421 | |
| 422 | memset(priv->ring_control, 0, sizeof(*priv->ring_control)); |
| 423 | priv->rx_idx = priv->tx_idx = 0; |
| 424 | p54p_refill_rx_ring(dev); |
| 425 | |
| 426 | p54p_upload_firmware(dev); |
| 427 | |
| 428 | P54P_WRITE(ring_control_base, priv->ring_control_dma); |
| 429 | P54P_READ(ring_control_base); |
| 430 | wmb(); |
| 431 | udelay(10); |
| 432 | |
| 433 | P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_INIT)); |
| 434 | P54P_READ(int_enable); |
| 435 | wmb(); |
| 436 | udelay(10); |
| 437 | |
| 438 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET)); |
| 439 | P54P_READ(dev_int); |
| 440 | |
| 441 | if (!wait_for_completion_interruptible_timeout(&priv->boot_comp, HZ)) { |
| 442 | printk(KERN_ERR "%s: Cannot boot firmware!\n", |
| 443 | wiphy_name(dev->wiphy)); |
| 444 | free_irq(priv->pdev->irq, dev); |
| 445 | return -ETIMEDOUT; |
| 446 | } |
| 447 | |
| 448 | P54P_WRITE(int_enable, cpu_to_le32(ISL38XX_INT_IDENT_UPDATE)); |
| 449 | P54P_READ(int_enable); |
| 450 | wmb(); |
| 451 | udelay(10); |
| 452 | |
| 453 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_UPDATE)); |
| 454 | P54P_READ(dev_int); |
| 455 | wmb(); |
| 456 | udelay(10); |
| 457 | |
| 458 | return 0; |
| 459 | } |
| 460 | |
| 461 | static void p54p_stop(struct ieee80211_hw *dev) |
| 462 | { |
| 463 | struct p54p_priv *priv = dev->priv; |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 464 | struct p54p_ring_control *ring_control = priv->ring_control; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 465 | unsigned int i; |
| 466 | struct p54p_desc *desc; |
| 467 | |
| 468 | P54P_WRITE(int_enable, 0); |
| 469 | P54P_READ(int_enable); |
| 470 | udelay(10); |
| 471 | |
| 472 | free_irq(priv->pdev->irq, dev); |
| 473 | |
| 474 | P54P_WRITE(dev_int, cpu_to_le32(ISL38XX_DEV_INT_RESET)); |
| 475 | |
| 476 | for (i = 0; i < ARRAY_SIZE(priv->rx_buf); i++) { |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 477 | desc = &ring_control->rx_data[i]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 478 | if (desc->host_addr) |
| 479 | pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr), |
| 480 | MAX_RX_SIZE, PCI_DMA_FROMDEVICE); |
| 481 | kfree_skb(priv->rx_buf[i]); |
| 482 | priv->rx_buf[i] = NULL; |
| 483 | } |
| 484 | |
| 485 | for (i = 0; i < ARRAY_SIZE(priv->tx_buf); i++) { |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 486 | desc = &ring_control->tx_data[i]; |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 487 | if (desc->host_addr) |
| 488 | pci_unmap_single(priv->pdev, le32_to_cpu(desc->host_addr), |
| 489 | le16_to_cpu(desc->len), PCI_DMA_TODEVICE); |
| 490 | |
| 491 | kfree(priv->tx_buf[i]); |
| 492 | priv->tx_buf[i] = NULL; |
| 493 | } |
| 494 | |
Dmitry Torokhov | eb76bf2 | 2007-11-02 01:55:36 -0400 | [diff] [blame] | 495 | memset(ring_control, 0, sizeof(ring_control)); |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | static int __devinit p54p_probe(struct pci_dev *pdev, |
| 499 | const struct pci_device_id *id) |
| 500 | { |
| 501 | struct p54p_priv *priv; |
| 502 | struct ieee80211_hw *dev; |
| 503 | unsigned long mem_addr, mem_len; |
| 504 | int err; |
| 505 | DECLARE_MAC_BUF(mac); |
| 506 | |
| 507 | err = pci_enable_device(pdev); |
| 508 | if (err) { |
| 509 | printk(KERN_ERR "%s (prism54pci): Cannot enable new PCI device\n", |
| 510 | pci_name(pdev)); |
| 511 | return err; |
| 512 | } |
| 513 | |
| 514 | mem_addr = pci_resource_start(pdev, 0); |
| 515 | mem_len = pci_resource_len(pdev, 0); |
| 516 | if (mem_len < sizeof(struct p54p_csr)) { |
| 517 | printk(KERN_ERR "%s (prism54pci): Too short PCI resources\n", |
| 518 | pci_name(pdev)); |
| 519 | pci_disable_device(pdev); |
| 520 | return err; |
| 521 | } |
| 522 | |
| 523 | err = pci_request_regions(pdev, "prism54pci"); |
| 524 | if (err) { |
| 525 | printk(KERN_ERR "%s (prism54pci): Cannot obtain PCI resources\n", |
| 526 | pci_name(pdev)); |
| 527 | return err; |
| 528 | } |
| 529 | |
| 530 | if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) || |
| 531 | pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK)) { |
| 532 | printk(KERN_ERR "%s (prism54pci): No suitable DMA available\n", |
| 533 | pci_name(pdev)); |
| 534 | goto err_free_reg; |
| 535 | } |
| 536 | |
| 537 | pci_set_master(pdev); |
| 538 | pci_try_set_mwi(pdev); |
| 539 | |
| 540 | pci_write_config_byte(pdev, 0x40, 0); |
| 541 | pci_write_config_byte(pdev, 0x41, 0); |
| 542 | |
| 543 | dev = p54_init_common(sizeof(*priv)); |
| 544 | if (!dev) { |
| 545 | printk(KERN_ERR "%s (prism54pci): ieee80211 alloc failed\n", |
| 546 | pci_name(pdev)); |
| 547 | err = -ENOMEM; |
| 548 | goto err_free_reg; |
| 549 | } |
| 550 | |
| 551 | priv = dev->priv; |
| 552 | priv->pdev = pdev; |
| 553 | |
| 554 | SET_IEEE80211_DEV(dev, &pdev->dev); |
| 555 | pci_set_drvdata(pdev, dev); |
| 556 | |
| 557 | priv->map = ioremap(mem_addr, mem_len); |
| 558 | if (!priv->map) { |
| 559 | printk(KERN_ERR "%s (prism54pci): Cannot map device memory\n", |
| 560 | pci_name(pdev)); |
| 561 | err = -EINVAL; // TODO: use a better error code? |
| 562 | goto err_free_dev; |
| 563 | } |
| 564 | |
| 565 | priv->ring_control = pci_alloc_consistent(pdev, sizeof(*priv->ring_control), |
| 566 | &priv->ring_control_dma); |
| 567 | if (!priv->ring_control) { |
| 568 | printk(KERN_ERR "%s (prism54pci): Cannot allocate rings\n", |
| 569 | pci_name(pdev)); |
| 570 | err = -ENOMEM; |
| 571 | goto err_iounmap; |
| 572 | } |
| 573 | memset(priv->ring_control, 0, sizeof(*priv->ring_control)); |
| 574 | |
| 575 | err = p54p_upload_firmware(dev); |
| 576 | if (err) |
| 577 | goto err_free_desc; |
| 578 | |
| 579 | err = p54p_read_eeprom(dev); |
| 580 | if (err) |
| 581 | goto err_free_desc; |
| 582 | |
| 583 | priv->common.open = p54p_open; |
| 584 | priv->common.stop = p54p_stop; |
| 585 | priv->common.tx = p54p_tx; |
| 586 | |
| 587 | spin_lock_init(&priv->lock); |
| 588 | |
| 589 | err = ieee80211_register_hw(dev); |
| 590 | if (err) { |
| 591 | printk(KERN_ERR "%s (prism54pci): Cannot register netdevice\n", |
| 592 | pci_name(pdev)); |
| 593 | goto err_free_common; |
| 594 | } |
| 595 | |
| 596 | printk(KERN_INFO "%s: hwaddr %s, isl38%02x\n", |
| 597 | wiphy_name(dev->wiphy), |
| 598 | print_mac(mac, dev->wiphy->perm_addr), |
| 599 | priv->common.version); |
| 600 | |
| 601 | return 0; |
| 602 | |
| 603 | err_free_common: |
| 604 | p54_free_common(dev); |
| 605 | |
| 606 | err_free_desc: |
| 607 | pci_free_consistent(pdev, sizeof(*priv->ring_control), |
| 608 | priv->ring_control, priv->ring_control_dma); |
| 609 | |
| 610 | err_iounmap: |
| 611 | iounmap(priv->map); |
| 612 | |
| 613 | err_free_dev: |
| 614 | pci_set_drvdata(pdev, NULL); |
| 615 | ieee80211_free_hw(dev); |
| 616 | |
| 617 | err_free_reg: |
| 618 | pci_release_regions(pdev); |
| 619 | pci_disable_device(pdev); |
| 620 | return err; |
| 621 | } |
| 622 | |
| 623 | static void __devexit p54p_remove(struct pci_dev *pdev) |
| 624 | { |
| 625 | struct ieee80211_hw *dev = pci_get_drvdata(pdev); |
| 626 | struct p54p_priv *priv; |
| 627 | |
| 628 | if (!dev) |
| 629 | return; |
| 630 | |
| 631 | ieee80211_unregister_hw(dev); |
| 632 | priv = dev->priv; |
| 633 | pci_free_consistent(pdev, sizeof(*priv->ring_control), |
| 634 | priv->ring_control, priv->ring_control_dma); |
| 635 | p54_free_common(dev); |
| 636 | iounmap(priv->map); |
| 637 | pci_release_regions(pdev); |
| 638 | pci_disable_device(pdev); |
| 639 | ieee80211_free_hw(dev); |
| 640 | } |
| 641 | |
| 642 | #ifdef CONFIG_PM |
| 643 | static int p54p_suspend(struct pci_dev *pdev, pm_message_t state) |
| 644 | { |
| 645 | struct ieee80211_hw *dev = pci_get_drvdata(pdev); |
| 646 | struct p54p_priv *priv = dev->priv; |
| 647 | |
Johannes Berg | a289755 | 2007-09-28 14:01:25 +0200 | [diff] [blame] | 648 | if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) { |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 649 | ieee80211_stop_queues(dev); |
| 650 | p54p_stop(dev); |
| 651 | } |
| 652 | |
| 653 | pci_save_state(pdev); |
| 654 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | static int p54p_resume(struct pci_dev *pdev) |
| 659 | { |
| 660 | struct ieee80211_hw *dev = pci_get_drvdata(pdev); |
| 661 | struct p54p_priv *priv = dev->priv; |
| 662 | |
| 663 | pci_set_power_state(pdev, PCI_D0); |
| 664 | pci_restore_state(pdev); |
| 665 | |
Johannes Berg | a289755 | 2007-09-28 14:01:25 +0200 | [diff] [blame] | 666 | if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) { |
Michael Wu | eff1a59 | 2007-09-25 18:11:01 -0700 | [diff] [blame] | 667 | p54p_open(dev); |
| 668 | ieee80211_start_queues(dev); |
| 669 | } |
| 670 | |
| 671 | return 0; |
| 672 | } |
| 673 | #endif /* CONFIG_PM */ |
| 674 | |
| 675 | static struct pci_driver p54p_driver = { |
| 676 | .name = "prism54pci", |
| 677 | .id_table = p54p_table, |
| 678 | .probe = p54p_probe, |
| 679 | .remove = __devexit_p(p54p_remove), |
| 680 | #ifdef CONFIG_PM |
| 681 | .suspend = p54p_suspend, |
| 682 | .resume = p54p_resume, |
| 683 | #endif /* CONFIG_PM */ |
| 684 | }; |
| 685 | |
| 686 | static int __init p54p_init(void) |
| 687 | { |
| 688 | return pci_register_driver(&p54p_driver); |
| 689 | } |
| 690 | |
| 691 | static void __exit p54p_exit(void) |
| 692 | { |
| 693 | pci_unregister_driver(&p54p_driver); |
| 694 | } |
| 695 | |
| 696 | module_init(p54p_init); |
| 697 | module_exit(p54p_exit); |