drivers/net/wireless/p54/p54spi.c

   1 /*
   2  * Copyright (C) 2008 Christian Lamparter <chunkeey@web.de>
   3  * Copyright 2008       Johannes Berg <johannes@sipsolutions.net>
   4  *
   5  * This driver is a port from stlc45xx:
   6  *      Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/firmware.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/spi/spi.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/gpio.h>
  32 #include <linux/slab.h>
  33
  34 #include "p54spi.h"
  35 #include "p54.h"
  36
  37 #include "lmac.h"
  38
  39 #ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
  40 #include "p54spi_eeprom.h"
  41 #endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
  42
  43 MODULE_FIRMWARE("3826.arm");
  44
  45 /*
  46  * gpios should be handled in board files and provided via platform data,
  47  * but because it's currently impossible for p54spi to have a header file
  48  * in include/linux, let's use module paramaters for now
  49  */
  50
  51 static int p54spi_gpio_power = 97;
  52 module_param(p54spi_gpio_power, int, 0444);
  53 MODULE_PARM_DESC(p54spi_gpio_power, "gpio number for power line");
  54
  55 static int p54spi_gpio_irq = 87;
  56 module_param(p54spi_gpio_irq, int, 0444);
  57 MODULE_PARM_DESC(p54spi_gpio_irq, "gpio number for irq line");
  58
  59 static void p54spi_spi_read(struct p54s_priv *priv, u8 address,
  60                               void *buf, size_t len)
  61 {
  62         struct spi_transfer t[2];
  63         struct spi_message m;
  64         __le16 addr;
  65
  66         /* We first push the address */
  67         addr = cpu_to_le16(address << 8 | SPI_ADRS_READ_BIT_15);
  68
  69         spi_message_init(&m);
  70         memset(t, 0, sizeof(t));
  71
  72         t[0].tx_buf = &addr;
  73         t[0].len = sizeof(addr);
  74         spi_message_add_tail(&t[0], &m);
  75
  76         t[1].rx_buf = buf;
  77         t[1].len = len;
  78         spi_message_add_tail(&t[1], &m);
  79
  80         spi_sync(priv->spi, &m);
  81 }
  82
  83
  84 static void p54spi_spi_write(struct p54s_priv *priv, u8 address,
  85                              const void *buf, size_t len)
  86 {
  87         struct spi_transfer t[3];
  88         struct spi_message m;
  89         __le16 addr;
  90
  91         /* We first push the address */
  92         addr = cpu_to_le16(address << 8);
  93
  94         spi_message_init(&m);
  95         memset(t, 0, sizeof(t));
  96
  97         t[0].tx_buf = &addr;
  98         t[0].len = sizeof(addr);
  99         spi_message_add_tail(&t[0], &m);
 100
 101         t[1].tx_buf = buf;
 102         t[1].len = len & ~1;
 103         spi_message_add_tail(&t[1], &m);
 104
 105         if (len % 2) {
 106                 __le16 last_word;
 107                 last_word = cpu_to_le16(((u8 *)buf)[len - 1]);
 108
 109                 t[2].tx_buf = &last_word;
 110                 t[2].len = sizeof(last_word);
 111                 spi_message_add_tail(&t[2], &m);
 112         }
 113
 114         spi_sync(priv->spi, &m);
 115 }
 116
 117 static u32 p54spi_read32(struct p54s_priv *priv, u8 addr)
 118 {
 119         __le32 val;
 120
 121         p54spi_spi_read(priv, addr, &val, sizeof(val));
 122
 123         return le32_to_cpu(val);
 124 }
 125
 126 static inline void p54spi_write16(struct p54s_priv *priv, u8 addr, __le16 val)
 127 {
 128         p54spi_spi_write(priv, addr, &val, sizeof(val));
 129 }
 130
 131 static inline void p54spi_write32(struct p54s_priv *priv, u8 addr, __le32 val)
 132 {
 133         p54spi_spi_write(priv, addr, &val, sizeof(val));
 134 }
 135
 136 static int p54spi_wait_bit(struct p54s_priv *priv, u16 reg, u32 bits)
 137 {
 138         int i;
 139
 140         for (i = 0; i < 2000; i++) {
 141                 u32 buffer = p54spi_read32(priv, reg);
 142                 if ((buffer & bits) == bits)
 143                         return 1;
 144         }
 145         return 0;
 146 }
 147
 148 static int p54spi_spi_write_dma(struct p54s_priv *priv, __le32 base,
 149                                 const void *buf, size_t len)
 150 {
 151         if (!p54spi_wait_bit(priv, SPI_ADRS_DMA_WRITE_CTRL, HOST_ALLOWED)) {
 152                 dev_err(&priv->spi->dev, "spi_write_dma not allowed "
 153                         "to DMA write.\n");
 154                 return -EAGAIN;
 155         }
 156
 157         p54spi_write16(priv, SPI_ADRS_DMA_WRITE_CTRL,
 158                        cpu_to_le16(SPI_DMA_WRITE_CTRL_ENABLE));
 159
 160         p54spi_write16(priv, SPI_ADRS_DMA_WRITE_LEN, cpu_to_le16(len));
 161         p54spi_write32(priv, SPI_ADRS_DMA_WRITE_BASE, base);
 162         p54spi_spi_write(priv, SPI_ADRS_DMA_DATA, buf, len);
 163         return 0;
 164 }
 165
 166 static int p54spi_request_firmware(struct ieee80211_hw *dev)
 167 {
 168         struct p54s_priv *priv = dev->priv;
 169         int ret;
 170
 171         /* FIXME: should driver use it's own struct device? */
 172         ret = request_firmware(&priv->firmware, "3826.arm", &priv->spi->dev);
 173
 174         if (ret < 0) {
 175                 dev_err(&priv->spi->dev, "request_firmware() failed: %d", ret);
 176                 return ret;
 177         }
 178
 179         ret = p54_parse_firmware(dev, priv->firmware);
 180         if (ret) {
 181                 release_firmware(priv->firmware);
 182                 return ret;
 183         }
 184
 185         return 0;
 186 }
 187
 188 static int p54spi_request_eeprom(struct ieee80211_hw *dev)
 189 {
 190         struct p54s_priv *priv = dev->priv;
 191         const struct firmware *eeprom;
 192         int ret;
 193
 194         /*
 195          * allow users to customize their eeprom.
 196          */
 197
 198         ret = request_firmware(&eeprom, "3826.eeprom", &priv->spi->dev);
 199         if (ret < 0) {
 200 #ifdef CONFIG_P54_SPI_DEFAULT_EEPROM
 201                 dev_info(&priv->spi->dev, "loading default eeprom...\n");
 202                 ret = p54_parse_eeprom(dev, (void *) p54spi_eeprom,
 203                                        sizeof(p54spi_eeprom));
 204 #else
 205                 dev_err(&priv->spi->dev, "Failed to request user eeprom\n");
 206 #endif /* CONFIG_P54_SPI_DEFAULT_EEPROM */
 207         } else {
 208                 dev_info(&priv->spi->dev, "loading user eeprom...\n");
 209                 ret = p54_parse_eeprom(dev, (void *) eeprom->data,
 210                                        (int)eeprom->size);
 211                 release_firmware(eeprom);
 212         }
 213         return ret;
 214 }
 215
 216 static int p54spi_upload_firmware(struct ieee80211_hw *dev)
 217 {
 218         struct p54s_priv *priv = dev->priv;
 219         unsigned long fw_len, _fw_len;
 220         unsigned int offset = 0;
 221         int err = 0;
 222         u8 *fw;
 223
 224         fw_len = priv->firmware->size;
 225         fw = kmemdup(priv->firmware->data, fw_len, GFP_KERNEL);
 226         if (!fw)
 227                 return -ENOMEM;
 228
 229         /* stop the device */
 230         p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
 231                        SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
 232                        SPI_CTRL_STAT_START_HALTED));
 233
 234         msleep(TARGET_BOOT_SLEEP);
 235
 236         p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
 237                        SPI_CTRL_STAT_HOST_OVERRIDE |
 238                        SPI_CTRL_STAT_START_HALTED));
 239
 240         msleep(TARGET_BOOT_SLEEP);
 241
 242         while (fw_len > 0) {
 243                 _fw_len = min_t(long, fw_len, SPI_MAX_PACKET_SIZE);
 244
 245                 err = p54spi_spi_write_dma(priv, cpu_to_le32(
 246                                            ISL38XX_DEV_FIRMWARE_ADDR + offset),
 247                                            (fw + offset), _fw_len);
 248                 if (err < 0)
 249                         goto out;
 250
 251                 fw_len -= _fw_len;
 252                 offset += _fw_len;
 253         }
 254
 255         BUG_ON(fw_len != 0);
 256
 257         /* enable host interrupts */
 258         p54spi_write32(priv, SPI_ADRS_HOST_INT_EN,
 259                        cpu_to_le32(SPI_HOST_INTS_DEFAULT));
 260
 261         /* boot the device */
 262         p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
 263                        SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_HOST_RESET |
 264                        SPI_CTRL_STAT_RAM_BOOT));
 265
 266         msleep(TARGET_BOOT_SLEEP);
 267
 268         p54spi_write16(priv, SPI_ADRS_DEV_CTRL_STAT, cpu_to_le16(
 269                        SPI_CTRL_STAT_HOST_OVERRIDE | SPI_CTRL_STAT_RAM_BOOT));
 270         msleep(TARGET_BOOT_SLEEP);
 271
 272 out:
 273         kfree(fw);
 274         return err;
 275 }
 276
 277 static void p54spi_power_off(struct p54s_priv *priv)
 278 {
 279         disable_irq(gpio_to_irq(p54spi_gpio_irq));
 280         gpio_set_value(p54spi_gpio_power, 0);
 281 }
 282
 283 static void p54spi_power_on(struct p54s_priv *priv)
 284 {
 285         gpio_set_value(p54spi_gpio_power, 1);
 286         enable_irq(gpio_to_irq(p54spi_gpio_irq));
 287
 288         /*
 289          * need to wait a while before device can be accessed, the length
 290          * is just a guess
 291          */
 292         msleep(10);
 293 }
 294
 295 static inline void p54spi_int_ack(struct p54s_priv *priv, u32 val)
 296 {
 297         p54spi_write32(priv, SPI_ADRS_HOST_INT_ACK, cpu_to_le32(val));
 298 }
 299
 300 static int p54spi_wakeup(struct p54s_priv *priv)
 301 {
 302         /* wake the chip */
 303         p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
 304                        cpu_to_le32(SPI_TARGET_INT_WAKEUP));
 305
 306         /* And wait for the READY interrupt */
 307         if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
 308                              SPI_HOST_INT_READY)) {
 309                 dev_err(&priv->spi->dev, "INT_READY timeout\n");
 310                 return -EBUSY;
 311         }
 312
 313         p54spi_int_ack(priv, SPI_HOST_INT_READY);
 314         return 0;
 315 }
 316
 317 static inline void p54spi_sleep(struct p54s_priv *priv)
 318 {
 319         p54spi_write32(priv, SPI_ADRS_ARM_INTERRUPTS,
 320                        cpu_to_le32(SPI_TARGET_INT_SLEEP));
 321 }
 322
 323 static void p54spi_int_ready(struct p54s_priv *priv)
 324 {
 325         p54spi_write32(priv, SPI_ADRS_HOST_INT_EN, cpu_to_le32(
 326                        SPI_HOST_INT_UPDATE | SPI_HOST_INT_SW_UPDATE));
 327
 328         switch (priv->fw_state) {
 329         case FW_STATE_BOOTING:
 330                 priv->fw_state = FW_STATE_READY;
 331                 complete(&priv->fw_comp);
 332                 break;
 333         case FW_STATE_RESETTING:
 334                 priv->fw_state = FW_STATE_READY;
 335                 /* TODO: reinitialize state */
 336                 break;
 337         default:
 338                 break;
 339         }
 340 }
 341
 342 static int p54spi_rx(struct p54s_priv *priv)
 343 {
 344         struct sk_buff *skb;
 345         u16 len;
 346         u16 rx_head[2];
 347 #define READAHEAD_SZ (sizeof(rx_head)-sizeof(u16))
 348
 349         if (p54spi_wakeup(priv) < 0)
 350                 return -EBUSY;
 351
 352         /* Read data size and first data word in one SPI transaction
 353          * This is workaround for firmware/DMA bug,
 354          * when first data word gets lost under high load.
 355          */
 356         p54spi_spi_read(priv, SPI_ADRS_DMA_DATA, rx_head, sizeof(rx_head));
 357         len = rx_head[0];
 358
 359         if (len == 0) {
 360                 p54spi_sleep(priv);
 361                 dev_err(&priv->spi->dev, "rx request of zero bytes\n");
 362                 return 0;
 363         }
 364
 365         /* Firmware may insert up to 4 padding bytes after the lmac header,
 366          * but it does not amend the size of SPI data transfer.
 367          * Such packets has correct data size in header, thus referencing
 368          * past the end of allocated skb. Reserve extra 4 bytes for this case */
 369         skb = dev_alloc_skb(len + 4);
 370         if (!skb) {
 371                 p54spi_sleep(priv);
 372                 dev_err(&priv->spi->dev, "could not alloc skb");
 373                 return -ENOMEM;
 374         }
 375
 376         if (len <= READAHEAD_SZ) {
 377                 memcpy(skb_put(skb, len), rx_head + 1, len);
 378         } else {
 379                 memcpy(skb_put(skb, READAHEAD_SZ), rx_head + 1, READAHEAD_SZ);
 380                 p54spi_spi_read(priv, SPI_ADRS_DMA_DATA,
 381                                 skb_put(skb, len - READAHEAD_SZ),
 382                                 len - READAHEAD_SZ);
 383         }
 384         p54spi_sleep(priv);
 385         /* Put additional bytes to compensate for the possible
 386          * alignment-caused truncation */
 387         skb_put(skb, 4);
 388
 389         if (p54_rx(priv->hw, skb) == 0)
 390                 dev_kfree_skb(skb);
 391
 392         return 0;
 393 }
 394
 395
 396 static irqreturn_t p54spi_interrupt(int irq, void *config)
 397 {
 398         struct spi_device *spi = config;
 399         struct p54s_priv *priv = dev_get_drvdata(&spi->dev);
 400
 401         ieee80211_queue_work(priv->hw, &priv->work);
 402
 403         return IRQ_HANDLED;
 404 }
 405
 406 static int p54spi_tx_frame(struct p54s_priv *priv, struct sk_buff *skb)
 407 {
 408         struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
 409         int ret = 0;
 410
 411         if (p54spi_wakeup(priv) < 0)
 412                 return -EBUSY;
 413
 414         ret = p54spi_spi_write_dma(priv, hdr->req_id, skb->data, skb->len);
 415         if (ret < 0)
 416                 goto out;
 417
 418         if (!p54spi_wait_bit(priv, SPI_ADRS_HOST_INTERRUPTS,
 419                              SPI_HOST_INT_WR_READY)) {
 420                 dev_err(&priv->spi->dev, "WR_READY timeout\n");
 421                 ret = -EAGAIN;
 422                 goto out;
 423         }
 424
 425         p54spi_int_ack(priv, SPI_HOST_INT_WR_READY);
 426
 427         if (FREE_AFTER_TX(skb))
 428                 p54_free_skb(priv->hw, skb);
 429 out:
 430         p54spi_sleep(priv);
 431         return ret;
 432 }
 433
 434 static int p54spi_wq_tx(struct p54s_priv *priv)
 435 {
 436         struct p54s_tx_info *entry;
 437         struct sk_buff *skb;
 438         struct ieee80211_tx_info *info;
 439         struct p54_tx_info *minfo;
 440         struct p54s_tx_info *dinfo;
 441         unsigned long flags;
 442         int ret = 0;
 443
 444         spin_lock_irqsave(&priv->tx_lock, flags);
 445
 446         while (!list_empty(&priv->tx_pending)) {
 447                 entry = list_entry(priv->tx_pending.next,
 448                                    struct p54s_tx_info, tx_list);
 449
 450                 list_del_init(&entry->tx_list);
 451
 452                 spin_unlock_irqrestore(&priv->tx_lock, flags);
 453
 454                 dinfo = container_of((void *) entry, struct p54s_tx_info,
 455                                      tx_list);
 456                 minfo = container_of((void *) dinfo, struct p54_tx_info,
 457                                      data);
 458                 info = container_of((void *) minfo, struct ieee80211_tx_info,
 459                                     rate_driver_data);
 460                 skb = container_of((void *) info, struct sk_buff, cb);
 461
 462                 ret = p54spi_tx_frame(priv, skb);
 463
 464                 if (ret < 0) {
 465                         p54_free_skb(priv->hw, skb);
 466                         return ret;
 467                 }
 468
 469                 spin_lock_irqsave(&priv->tx_lock, flags);
 470         }
 471         spin_unlock_irqrestore(&priv->tx_lock, flags);
 472         return ret;
 473 }
 474
 475 static void p54spi_op_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 476 {
 477         struct p54s_priv *priv = dev->priv;
 478         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 479         struct p54_tx_info *mi = (struct p54_tx_info *) info->rate_driver_data;
 480         struct p54s_tx_info *di = (struct p54s_tx_info *) mi->data;
 481         unsigned long flags;
 482
 483         BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data)));
 484
 485         spin_lock_irqsave(&priv->tx_lock, flags);
 486         list_add_tail(&di->tx_list, &priv->tx_pending);
 487         spin_unlock_irqrestore(&priv->tx_lock, flags);
 488
 489         ieee80211_queue_work(priv->hw, &priv->work);
 490 }
 491
 492 static void p54spi_work(struct work_struct *work)
 493 {
 494         struct p54s_priv *priv = container_of(work, struct p54s_priv, work);
 495         u32 ints;
 496         int ret;
 497
 498         mutex_lock(&priv->mutex);
 499
 500         if (priv->fw_state == FW_STATE_OFF)
 501                 goto out;
 502
 503         ints = p54spi_read32(priv, SPI_ADRS_HOST_INTERRUPTS);
 504
 505         if (ints & SPI_HOST_INT_READY) {
 506                 p54spi_int_ready(priv);
 507                 p54spi_int_ack(priv, SPI_HOST_INT_READY);
 508         }
 509
 510         if (priv->fw_state != FW_STATE_READY)
 511                 goto out;
 512
 513         if (ints & SPI_HOST_INT_UPDATE) {
 514                 p54spi_int_ack(priv, SPI_HOST_INT_UPDATE);
 515                 ret = p54spi_rx(priv);
 516                 if (ret < 0)
 517                         goto out;
 518         }
 519         if (ints & SPI_HOST_INT_SW_UPDATE) {
 520                 p54spi_int_ack(priv, SPI_HOST_INT_SW_UPDATE);
 521                 ret = p54spi_rx(priv);
 522                 if (ret < 0)
 523                         goto out;
 524         }
 525
 526         ret = p54spi_wq_tx(priv);
 527 out:
 528         mutex_unlock(&priv->mutex);
 529 }
 530
 531 static int p54spi_op_start(struct ieee80211_hw *dev)
 532 {
 533         struct p54s_priv *priv = dev->priv;
 534         unsigned long timeout;
 535         int ret = 0;
 536
 537         if (mutex_lock_interruptible(&priv->mutex)) {
 538                 ret = -EINTR;
 539                 goto out;
 540         }
 541
 542         priv->fw_state = FW_STATE_BOOTING;
 543
 544         p54spi_power_on(priv);
 545
 546         ret = p54spi_upload_firmware(dev);
 547         if (ret < 0) {
 548                 p54spi_power_off(priv);
 549                 goto out_unlock;
 550         }
 551
 552         mutex_unlock(&priv->mutex);
 553
 554         timeout = msecs_to_jiffies(2000);
 555         timeout = wait_for_completion_interruptible_timeout(&priv->fw_comp,
 556                                                             timeout);
 557         if (!timeout) {
 558                 dev_err(&priv->spi->dev, "firmware boot failed");
 559                 p54spi_power_off(priv);
 560                 ret = -1;
 561                 goto out;
 562         }
 563
 564         if (mutex_lock_interruptible(&priv->mutex)) {
 565                 ret = -EINTR;
 566                 p54spi_power_off(priv);
 567                 goto out;
 568         }
 569
 570         WARN_ON(priv->fw_state != FW_STATE_READY);
 571
 572 out_unlock:
 573         mutex_unlock(&priv->mutex);
 574
 575 out:
 576         return ret;
 577 }
 578
 579 static void p54spi_op_stop(struct ieee80211_hw *dev)
 580 {
 581         struct p54s_priv *priv = dev->priv;
 582         unsigned long flags;
 583
 584         if (mutex_lock_interruptible(&priv->mutex)) {
 585                 /* FIXME: how to handle this error? */
 586                 return;
 587         }
 588
 589         WARN_ON(priv->fw_state != FW_STATE_READY);
 590
 591         p54spi_power_off(priv);
 592         spin_lock_irqsave(&priv->tx_lock, flags);
 593         INIT_LIST_HEAD(&priv->tx_pending);
 594         spin_unlock_irqrestore(&priv->tx_lock, flags);
 595
 596         priv->fw_state = FW_STATE_OFF;
 597         mutex_unlock(&priv->mutex);
 598
 599         cancel_work_sync(&priv->work);
 600 }
 601
 602 static int __devinit p54spi_probe(struct spi_device *spi)
 603 {
 604         struct p54s_priv *priv = NULL;
 605         struct ieee80211_hw *hw;
 606         int ret = -EINVAL;
 607
 608         hw = p54_init_common(sizeof(*priv));
 609         if (!hw) {
 610                 dev_err(&spi->dev, "could not alloc ieee80211_hw");
 611                 return -ENOMEM;
 612         }
 613
 614         priv = hw->priv;
 615         priv->hw = hw;
 616         dev_set_drvdata(&spi->dev, priv);
 617         priv->spi = spi;
 618
 619         spi->bits_per_word = 16;
 620         spi->max_speed_hz = 24000000;
 621
 622         ret = spi_setup(spi);
 623         if (ret < 0) {
 624                 dev_err(&priv->spi->dev, "spi_setup failed");
 625                 goto err_free_common;
 626         }
 627
 628         ret = gpio_request(p54spi_gpio_power, "p54spi power");
 629         if (ret < 0) {
 630                 dev_err(&priv->spi->dev, "power GPIO request failed: %d", ret);
 631                 goto err_free_common;
 632         }
 633
 634         ret = gpio_request(p54spi_gpio_irq, "p54spi irq");
 635         if (ret < 0) {
 636                 dev_err(&priv->spi->dev, "irq GPIO request failed: %d", ret);
 637                 goto err_free_common;
 638         }
 639
 640         gpio_direction_output(p54spi_gpio_power, 0);
 641         gpio_direction_input(p54spi_gpio_irq);
 642
 643         ret = request_irq(gpio_to_irq(p54spi_gpio_irq),
 644                           p54spi_interrupt, IRQF_DISABLED, "p54spi",
 645                           priv->spi);
 646         if (ret < 0) {
 647                 dev_err(&priv->spi->dev, "request_irq() failed");
 648                 goto err_free_common;
 649         }
 650
 651         irq_set_irq_type(gpio_to_irq(p54spi_gpio_irq), IRQ_TYPE_EDGE_RISING);
 652
 653         disable_irq(gpio_to_irq(p54spi_gpio_irq));
 654
 655         INIT_WORK(&priv->work, p54spi_work);
 656         init_completion(&priv->fw_comp);
 657         INIT_LIST_HEAD(&priv->tx_pending);
 658         mutex_init(&priv->mutex);
 659         spin_lock_init(&priv->tx_lock);
 660         SET_IEEE80211_DEV(hw, &spi->dev);
 661         priv->common.open = p54spi_op_start;
 662         priv->common.stop = p54spi_op_stop;
 663         priv->common.tx = p54spi_op_tx;
 664
 665         ret = p54spi_request_firmware(hw);
 666         if (ret < 0)
 667                 goto err_free_common;
 668
 669         ret = p54spi_request_eeprom(hw);
 670         if (ret)
 671                 goto err_free_common;
 672
 673         ret = p54_register_common(hw, &priv->spi->dev);
 674         if (ret)
 675                 goto err_free_common;
 676
 677         return 0;
 678
 679 err_free_common:
 680         p54_free_common(priv->hw);
 681         return ret;
 682 }
 683
 684 static int __devexit p54spi_remove(struct spi_device *spi)
 685 {
 686         struct p54s_priv *priv = dev_get_drvdata(&spi->dev);
 687
 688         p54_unregister_common(priv->hw);
 689
 690         free_irq(gpio_to_irq(p54spi_gpio_irq), spi);
 691
 692         gpio_free(p54spi_gpio_power);
 693         gpio_free(p54spi_gpio_irq);
 694         release_firmware(priv->firmware);
 695
 696         mutex_destroy(&priv->mutex);
 697
 698         p54_free_common(priv->hw);
 699
 700         return 0;
 701 }
 702
 703
 704 static struct spi_driver p54spi_driver = {
 705         .driver = {
 706                 .name           = "p54spi",
 707                 .bus            = &spi_bus_type,
 708                 .owner          = THIS_MODULE,
 709         },
 710
 711         .probe          = p54spi_probe,
 712         .remove         = __devexit_p(p54spi_remove),
 713 };
 714
 715 static int __init p54spi_init(void)
 716 {
 717         int ret;
 718
 719         ret = spi_register_driver(&p54spi_driver);
 720         if (ret < 0) {
 721                 printk(KERN_ERR "failed to register SPI driver: %d", ret);
 722                 goto out;
 723         }
 724
 725 out:
 726         return ret;
 727 }
 728
 729 static void __exit p54spi_exit(void)
 730 {
 731         spi_unregister_driver(&p54spi_driver);
 732 }
 733
 734 module_init(p54spi_init);
 735 module_exit(p54spi_exit);
 736
 737 MODULE_LICENSE("GPL");
 738 MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
 739 MODULE_ALIAS("spi:cx3110x");
 740 MODULE_ALIAS("spi:p54spi");
 741 MODULE_ALIAS("spi:stlc45xx");