drivers/net/wireless/wl12xx/sdio_test.c

   1 /*
   2  * SDIO testing driver for wl12xx
   3  *
   4  * Copyright (C) 2010 Nokia Corporation
   5  *
   6  * Contact: Roger Quadros <roger.quadros@nokia.com>
   7  *
   8  * wl12xx read/write routines taken from the main module
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * version 2 as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  22  * 02110-1301 USA
  23  *
  24  */
  25
  26 #include <linux/irq.h>
  27 #include <linux/module.h>
  28 #include <linux/crc7.h>
  29 #include <linux/vmalloc.h>
  30 #include <linux/mmc/sdio_func.h>
  31 #include <linux/mmc/sdio_ids.h>
  32 #include <linux/mmc/card.h>
  33 #include <linux/gpio.h>
  34 #include <linux/wl12xx.h>
  35 #include <linux/kthread.h>
  36 #include <linux/firmware.h>
  37 #include <linux/pm_runtime.h>
  38
  39 #include "wl12xx.h"
  40 #include "io.h"
  41 #include "boot.h"
  42
  43 #ifndef SDIO_VENDOR_ID_TI
  44 #define SDIO_VENDOR_ID_TI               0x0097
  45 #endif
  46
  47 #ifndef SDIO_DEVICE_ID_TI_WL1271
  48 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
  49 #endif
  50
  51 static bool rx, tx;
  52
  53 module_param(rx, bool, S_IRUGO | S_IWUSR);
  54 MODULE_PARM_DESC(rx, "Perform rx test. Default (0). "
  55         "This test continuously reads data from the SDIO device.\n");
  56
  57 module_param(tx, bool, S_IRUGO | S_IWUSR);
  58 MODULE_PARM_DESC(tx, "Perform tx test. Default (0). "
  59         "This test continuously writes data to the SDIO device.\n");
  60
  61 struct wl1271_test {
  62         struct wl1271 wl;
  63         struct task_struct *test_task;
  64 };
  65
  66 static const struct sdio_device_id wl1271_devices[] = {
  67         { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
  68         {}
  69 };
  70
  71 static inline struct sdio_func *wl_to_func(struct wl1271 *wl)
  72 {
  73         return wl->if_priv;
  74 }
  75
  76 static struct device *wl1271_sdio_wl_to_dev(struct wl1271 *wl)
  77 {
  78         return &(wl_to_func(wl)->dev);
  79 }
  80
  81 static void wl1271_sdio_raw_read(struct wl1271 *wl, int addr, void *buf,
  82                 size_t len, bool fixed)
  83 {
  84         int ret = 0;
  85         struct sdio_func *func = wl_to_func(wl);
  86
  87         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
  88                 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
  89                 wl1271_debug(DEBUG_SDIO, "sdio read 52 addr 0x%x, byte 0x%02x",
  90                                 addr, ((u8 *)buf)[0]);
  91         } else {
  92                 if (fixed)
  93                         ret = sdio_readsb(func, buf, addr, len);
  94                 else
  95                         ret = sdio_memcpy_fromio(func, buf, addr, len);
  96
  97                 wl1271_debug(DEBUG_SDIO, "sdio read 53 addr 0x%x, %zu bytes",
  98                                 addr, len);
  99                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 100         }
 101
 102         if (ret)
 103                 wl1271_error("sdio read failed (%d)", ret);
 104 }
 105
 106 static void wl1271_sdio_raw_write(struct wl1271 *wl, int addr, void *buf,
 107                 size_t len, bool fixed)
 108 {
 109         int ret = 0;
 110         struct sdio_func *func = wl_to_func(wl);
 111
 112         if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG_ADDR)) {
 113                 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
 114                 wl1271_debug(DEBUG_SDIO, "sdio write 52 addr 0x%x, byte 0x%02x",
 115                                 addr, ((u8 *)buf)[0]);
 116         } else {
 117                 wl1271_debug(DEBUG_SDIO, "sdio write 53 addr 0x%x, %zu bytes",
 118                                 addr, len);
 119                 wl1271_dump_ascii(DEBUG_SDIO, "data: ", buf, len);
 120
 121                 if (fixed)
 122                         ret = sdio_writesb(func, addr, buf, len);
 123                 else
 124                         ret = sdio_memcpy_toio(func, addr, buf, len);
 125         }
 126         if (ret)
 127                 wl1271_error("sdio write failed (%d)", ret);
 128
 129 }
 130
 131 static int wl1271_sdio_set_power(struct wl1271 *wl, bool enable)
 132 {
 133         struct sdio_func *func = wl_to_func(wl);
 134         int ret;
 135
 136         /* Let the SDIO stack handle wlan_enable control, so we
 137          * keep host claimed while wlan is in use to keep wl1271
 138          * alive.
 139          */
 140         if (enable) {
 141                 /* Power up the card */
 142                 ret = pm_runtime_get_sync(&func->dev);
 143                 if (ret < 0)
 144                         goto out;
 145                 sdio_claim_host(func);
 146                 sdio_enable_func(func);
 147                 sdio_release_host(func);
 148         } else {
 149                 sdio_claim_host(func);
 150                 sdio_disable_func(func);
 151                 sdio_release_host(func);
 152
 153                 /* Power down the card */
 154                 ret = pm_runtime_put_sync(&func->dev);
 155         }
 156
 157 out:
 158         return ret;
 159 }
 160
 161 static void wl1271_sdio_disable_interrupts(struct wl1271 *wl)
 162 {
 163 }
 164
 165 static void wl1271_sdio_enable_interrupts(struct wl1271 *wl)
 166 {
 167 }
 168
 169
 170 static struct wl1271_if_operations sdio_ops = {
 171         .read           = wl1271_sdio_raw_read,
 172         .write          = wl1271_sdio_raw_write,
 173         .power          = wl1271_sdio_set_power,
 174         .dev            = wl1271_sdio_wl_to_dev,
 175         .enable_irq     = wl1271_sdio_enable_interrupts,
 176         .disable_irq    = wl1271_sdio_disable_interrupts,
 177 };
 178
 179 static void wl1271_fw_wakeup(struct wl1271 *wl)
 180 {
 181         u32 elp_reg;
 182
 183         elp_reg = ELPCTRL_WAKE_UP;
 184         wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
 185 }
 186
 187 static int wl1271_fetch_firmware(struct wl1271 *wl)
 188 {
 189         const struct firmware *fw;
 190         int ret;
 191
 192         ret = request_firmware(&fw, WL1271_FW_NAME, wl1271_wl_to_dev(wl));
 193
 194         if (ret < 0) {
 195                 wl1271_error("could not get firmware: %d", ret);
 196                 return ret;
 197         }
 198
 199         if (fw->size % 4) {
 200                 wl1271_error("firmware size is not multiple of 32 bits: %zu",
 201                                 fw->size);
 202                 ret = -EILSEQ;
 203                 goto out;
 204         }
 205
 206         wl->fw_len = fw->size;
 207         wl->fw = vmalloc(wl->fw_len);
 208
 209         if (!wl->fw) {
 210                 wl1271_error("could not allocate memory for the firmware");
 211                 ret = -ENOMEM;
 212                 goto out;
 213         }
 214
 215         memcpy(wl->fw, fw->data, wl->fw_len);
 216
 217         ret = 0;
 218
 219 out:
 220         release_firmware(fw);
 221
 222         return ret;
 223 }
 224
 225 static int wl1271_fetch_nvs(struct wl1271 *wl)
 226 {
 227         const struct firmware *fw;
 228         int ret;
 229
 230         ret = request_firmware(&fw, WL1271_NVS_NAME, wl1271_wl_to_dev(wl));
 231
 232         if (ret < 0) {
 233                 wl1271_error("could not get nvs file: %d", ret);
 234                 return ret;
 235         }
 236
 237         wl->nvs = kmemdup(fw->data, sizeof(struct wl1271_nvs_file), GFP_KERNEL);
 238
 239         if (!wl->nvs) {
 240                 wl1271_error("could not allocate memory for the nvs file");
 241                 ret = -ENOMEM;
 242                 goto out;
 243         }
 244
 245         wl->nvs_len = fw->size;
 246
 247 out:
 248         release_firmware(fw);
 249
 250         return ret;
 251 }
 252
 253 static int wl1271_chip_wakeup(struct wl1271 *wl)
 254 {
 255         struct wl1271_partition_set partition;
 256         int ret;
 257
 258         msleep(WL1271_PRE_POWER_ON_SLEEP);
 259         ret = wl1271_power_on(wl);
 260         if (ret)
 261                 return ret;
 262
 263         msleep(WL1271_POWER_ON_SLEEP);
 264
 265         /* We don't need a real memory partition here, because we only want
 266          * to use the registers at this point. */
 267         memset(&partition, 0, sizeof(partition));
 268         partition.reg.start = REGISTERS_BASE;
 269         partition.reg.size = REGISTERS_DOWN_SIZE;
 270         wl1271_set_partition(wl, &partition);
 271
 272         /* ELP module wake up */
 273         wl1271_fw_wakeup(wl);
 274
 275         /* whal_FwCtrl_BootSm() */
 276
 277         /* 0. read chip id from CHIP_ID */
 278         wl->chip.id = wl1271_read32(wl, CHIP_ID_B);
 279
 280         /* 1. check if chip id is valid */
 281
 282         switch (wl->chip.id) {
 283         case CHIP_ID_1271_PG10:
 284                 wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
 285                                 wl->chip.id);
 286                 break;
 287         case CHIP_ID_1271_PG20:
 288                 wl1271_notice("chip id 0x%x (1271 PG20)",
 289                                 wl->chip.id);
 290                 break;
 291         default:
 292                 wl1271_warning("unsupported chip id: 0x%x", wl->chip.id);
 293                 return -ENODEV;
 294         }
 295
 296         return ret;
 297 }
 298
 299 static struct wl1271_partition_set part_down = {
 300         .mem = {
 301                 .start = 0x00000000,
 302                 .size  = 0x000177c0
 303         },
 304         .reg = {
 305                 .start = REGISTERS_BASE,
 306                 .size  = 0x00008800
 307         },
 308         .mem2 = {
 309                 .start = 0x00000000,
 310                 .size  = 0x00000000
 311         },
 312         .mem3 = {
 313                 .start = 0x00000000,
 314                 .size  = 0x00000000
 315         },
 316 };
 317
 318 static int tester(void *data)
 319 {
 320         struct wl1271 *wl = data;
 321         struct sdio_func *func = wl_to_func(wl);
 322         struct device *pdev = &func->dev;
 323         int ret = 0;
 324         bool rx_started = 0;
 325         bool tx_started = 0;
 326         uint8_t *tx_buf, *rx_buf;
 327         int test_size = PAGE_SIZE;
 328         u32 addr = 0;
 329         struct wl1271_partition_set partition;
 330
 331         /* We assume chip is powered up and firmware fetched */
 332
 333         memcpy(&partition, &part_down, sizeof(partition));
 334         partition.mem.start = addr;
 335         wl1271_set_partition(wl, &partition);
 336
 337         tx_buf = kmalloc(test_size, GFP_KERNEL);
 338         rx_buf = kmalloc(test_size, GFP_KERNEL);
 339         if (!tx_buf || !rx_buf) {
 340                 dev_err(pdev,
 341                         "Could not allocate memory. Test will not run.\n");
 342                 ret = -ENOMEM;
 343                 goto free;
 344         }
 345
 346         memset(tx_buf, 0x5a, test_size);
 347
 348         /* write something in data area so we can read it back */
 349         wl1271_write(wl, addr, tx_buf, test_size, false);
 350
 351         while (!kthread_should_stop()) {
 352                 if (rx && !rx_started) {
 353                         dev_info(pdev, "starting rx test\n");
 354                         rx_started = 1;
 355                 } else if (!rx && rx_started) {
 356                         dev_info(pdev, "stopping rx test\n");
 357                         rx_started = 0;
 358                 }
 359
 360                 if (tx && !tx_started) {
 361                         dev_info(pdev, "starting tx test\n");
 362                         tx_started = 1;
 363                 } else if (!tx && tx_started) {
 364                         dev_info(pdev, "stopping tx test\n");
 365                         tx_started = 0;
 366                 }
 367
 368                 if (rx_started)
 369                         wl1271_read(wl, addr, rx_buf, test_size, false);
 370
 371                 if (tx_started)
 372                         wl1271_write(wl, addr, tx_buf, test_size, false);
 373
 374                 if (!rx_started && !tx_started)
 375                         msleep(100);
 376         }
 377
 378 free:
 379         kfree(tx_buf);
 380         kfree(rx_buf);
 381         return ret;
 382 }
 383
 384 static int __devinit wl1271_probe(struct sdio_func *func,
 385                 const struct sdio_device_id *id)
 386 {
 387         const struct wl12xx_platform_data *wlan_data;
 388         struct wl1271 *wl;
 389         struct wl1271_test *wl_test;
 390         int ret = 0;
 391
 392         /* wl1271 has 2 sdio functions we handle just the wlan part */
 393         if (func->num != 0x02)
 394                 return -ENODEV;
 395
 396         wl_test = kzalloc(sizeof(struct wl1271_test), GFP_KERNEL);
 397         if (!wl_test) {
 398                 dev_err(&func->dev, "Could not allocate memory\n");
 399                 return -ENOMEM;
 400         }
 401
 402         wl = &wl_test->wl;
 403
 404         wl->if_priv = func;
 405         wl->if_ops = &sdio_ops;
 406
 407         /* Grab access to FN0 for ELP reg. */
 408         func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
 409
 410         wlan_data = wl12xx_get_platform_data();
 411         if (IS_ERR(wlan_data)) {
 412                 ret = PTR_ERR(wlan_data);
 413                 dev_err(&func->dev, "missing wlan platform data: %d\n", ret);
 414                 goto out_free;
 415         }
 416
 417         wl->irq = wlan_data->irq;
 418         wl->ref_clock = wlan_data->board_ref_clock;
 419
 420         sdio_set_drvdata(func, wl_test);
 421
 422
 423         /* power up the device */
 424         ret = wl1271_chip_wakeup(wl);
 425         if (ret) {
 426                 dev_err(&func->dev, "could not wake up chip\n");
 427                 goto out_free;
 428         }
 429
 430         if (wl->fw == NULL) {
 431                 ret = wl1271_fetch_firmware(wl);
 432                 if (ret < 0) {
 433                         dev_err(&func->dev, "firmware fetch error\n");
 434                         goto out_off;
 435                 }
 436         }
 437
 438         /* fetch NVS */
 439         if (wl->nvs == NULL) {
 440                 ret = wl1271_fetch_nvs(wl);
 441                 if (ret < 0) {
 442                         dev_err(&func->dev, "NVS fetch error\n");
 443                         goto out_off;
 444                 }
 445         }
 446
 447         ret = wl1271_load_firmware(wl);
 448         if (ret < 0) {
 449                 dev_err(&func->dev, "firmware load error: %d\n", ret);
 450                 goto out_free;
 451         }
 452
 453         dev_info(&func->dev, "initialized\n");
 454
 455         /* I/O testing will be done in the tester thread */
 456
 457         wl_test->test_task = kthread_run(tester, wl, "sdio_tester");
 458         if (IS_ERR(wl_test->test_task)) {
 459                 dev_err(&func->dev, "unable to create kernel thread\n");
 460                 ret = PTR_ERR(wl_test->test_task);
 461                 goto out_free;
 462         }
 463
 464         return 0;
 465
 466 out_off:
 467         /* power off the chip */
 468         wl1271_power_off(wl);
 469
 470 out_free:
 471         kfree(wl_test);
 472         return ret;
 473 }
 474
 475 static void __devexit wl1271_remove(struct sdio_func *func)
 476 {
 477         struct wl1271_test *wl_test = sdio_get_drvdata(func);
 478
 479         /* stop the I/O test thread */
 480         kthread_stop(wl_test->test_task);
 481
 482         /* power off the chip */
 483         wl1271_power_off(&wl_test->wl);
 484
 485         vfree(wl_test->wl.fw);
 486         wl_test->wl.fw = NULL;
 487         kfree(wl_test->wl.nvs);
 488         wl_test->wl.nvs = NULL;
 489
 490         kfree(wl_test);
 491 }
 492
 493 static struct sdio_driver wl1271_sdio_driver = {
 494         .name           = "wl12xx_sdio_test",
 495         .id_table       = wl1271_devices,
 496         .probe          = wl1271_probe,
 497         .remove         = __devexit_p(wl1271_remove),
 498 };
 499
 500 static int __init wl1271_init(void)
 501 {
 502         int ret;
 503
 504         ret = sdio_register_driver(&wl1271_sdio_driver);
 505         if (ret < 0)
 506                 pr_err("failed to register sdio driver: %d\n", ret);
 507
 508         return ret;
 509 }
 510 module_init(wl1271_init);
 511
 512 static void __exit wl1271_exit(void)
 513 {
 514         sdio_unregister_driver(&wl1271_sdio_driver);
 515 }
 516 module_exit(wl1271_exit);
 517
 518 MODULE_LICENSE("GPL");
 519 MODULE_AUTHOR("Roger Quadros <roger.quadros@nokia.com>");
 520