1 /* 2 * This file is part of wl1271 3 * 4 * Copyright (C) 2009-2010 Nokia Corporation 5 * 6 * Contact: Luciano Coelho <luciano.coelho@nokia.com> 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 24 #include <linux/irq.h> 25 #include <linux/module.h> 26 #include <linux/vmalloc.h> 27 #include <linux/platform_device.h> 28 #include <linux/mmc/sdio.h> 29 #include <linux/mmc/sdio_func.h> 30 #include <linux/mmc/sdio_ids.h> 31 #include <linux/mmc/card.h> 32 #include <linux/mmc/host.h> 33 #include <linux/gpio.h> 34 #include <linux/pm_runtime.h> 35 #include <linux/printk.h> 36 #include <linux/of.h> 37 #include <linux/of_irq.h> 38 39 #include "wlcore.h" 40 #include "wl12xx_80211.h" 41 #include "io.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 dump = false; 52 53 struct wl12xx_sdio_glue { 54 struct device *dev; 55 struct platform_device *core; 56 }; 57 58 static const struct sdio_device_id wl1271_devices[] = { 59 { SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) }, 60 {} 61 }; 62 MODULE_DEVICE_TABLE(sdio, wl1271_devices); 63 64 static void wl1271_sdio_set_block_size(struct device *child, 65 unsigned int blksz) 66 { 67 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 68 struct sdio_func *func = dev_to_sdio_func(glue->dev); 69 70 sdio_claim_host(func); 71 sdio_set_block_size(func, blksz); 72 sdio_release_host(func); 73 } 74 75 static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr, 76 void *buf, size_t len, bool fixed) 77 { 78 int ret; 79 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 80 struct sdio_func *func = dev_to_sdio_func(glue->dev); 81 82 sdio_claim_host(func); 83 84 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 85 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret); 86 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n", 87 addr, ((u8 *)buf)[0]); 88 } else { 89 if (fixed) 90 ret = sdio_readsb(func, buf, addr, len); 91 else 92 ret = sdio_memcpy_fromio(func, buf, addr, len); 93 94 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n", 95 addr, len); 96 } 97 98 sdio_release_host(func); 99 100 if (WARN_ON(ret)) 101 dev_err(child->parent, "sdio read failed (%d)\n", ret); 102 103 if (unlikely(dump)) { 104 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr); 105 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ", 106 DUMP_PREFIX_OFFSET, 16, 1, 107 buf, len, false); 108 } 109 110 return ret; 111 } 112 113 static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr, 114 void *buf, size_t len, bool fixed) 115 { 116 int ret; 117 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 118 struct sdio_func *func = dev_to_sdio_func(glue->dev); 119 120 sdio_claim_host(func); 121 122 if (unlikely(dump)) { 123 printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr); 124 print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ", 125 DUMP_PREFIX_OFFSET, 16, 1, 126 buf, len, false); 127 } 128 129 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 130 sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret); 131 dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n", 132 addr, ((u8 *)buf)[0]); 133 } else { 134 dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n", 135 addr, len); 136 137 if (fixed) 138 ret = sdio_writesb(func, addr, buf, len); 139 else 140 ret = sdio_memcpy_toio(func, addr, buf, len); 141 } 142 143 sdio_release_host(func); 144 145 if (WARN_ON(ret)) 146 dev_err(child->parent, "sdio write failed (%d)\n", ret); 147 148 return ret; 149 } 150 151 static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue) 152 { 153 int ret; 154 struct sdio_func *func = dev_to_sdio_func(glue->dev); 155 struct mmc_card *card = func->card; 156 157 ret = pm_runtime_get_sync(&card->dev); 158 if (ret) { 159 /* 160 * Runtime PM might be temporarily disabled, or the device 161 * might have a positive reference counter. Make sure it is 162 * really powered on. 163 */ 164 ret = mmc_power_restore_host(card->host); 165 if (ret < 0) { 166 pm_runtime_put_sync(&card->dev); 167 goto out; 168 } 169 } 170 171 sdio_claim_host(func); 172 sdio_enable_func(func); 173 sdio_release_host(func); 174 175 out: 176 return ret; 177 } 178 179 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue) 180 { 181 int ret; 182 struct sdio_func *func = dev_to_sdio_func(glue->dev); 183 struct mmc_card *card = func->card; 184 185 sdio_claim_host(func); 186 sdio_disable_func(func); 187 sdio_release_host(func); 188 189 /* Power off the card manually in case it wasn't powered off above */ 190 ret = mmc_power_save_host(card->host); 191 if (ret < 0) 192 goto out; 193 194 /* Let runtime PM know the card is powered off */ 195 pm_runtime_put_sync(&card->dev); 196 197 out: 198 return ret; 199 } 200 201 static int wl12xx_sdio_set_power(struct device *child, bool enable) 202 { 203 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 204 205 if (enable) 206 return wl12xx_sdio_power_on(glue); 207 else 208 return wl12xx_sdio_power_off(glue); 209 } 210 211 static struct wl1271_if_operations sdio_ops = { 212 .read = wl12xx_sdio_raw_read, 213 .write = wl12xx_sdio_raw_write, 214 .power = wl12xx_sdio_set_power, 215 .set_block_size = wl1271_sdio_set_block_size, 216 }; 217 218 #ifdef CONFIG_OF 219 220 static const struct wilink_family_data wl127x_data = { 221 .name = "wl127x", 222 .nvs_name = "ti-connectivity/wl127x-nvs.bin", 223 }; 224 225 static const struct wilink_family_data wl128x_data = { 226 .name = "wl128x", 227 .nvs_name = "ti-connectivity/wl128x-nvs.bin", 228 }; 229 230 static const struct wilink_family_data wl18xx_data = { 231 .name = "wl18xx", 232 .cfg_name = "ti-connectivity/wl18xx-conf.bin", 233 .nvs_name = "ti-connectivity/wl1271-nvs.bin", 234 }; 235 236 static const struct of_device_id wlcore_sdio_of_match_table[] = { 237 { .compatible = "ti,wl1271", .data = &wl127x_data }, 238 { .compatible = "ti,wl1273", .data = &wl127x_data }, 239 { .compatible = "ti,wl1281", .data = &wl128x_data }, 240 { .compatible = "ti,wl1283", .data = &wl128x_data }, 241 { .compatible = "ti,wl1285", .data = &wl128x_data }, 242 { .compatible = "ti,wl1801", .data = &wl18xx_data }, 243 { .compatible = "ti,wl1805", .data = &wl18xx_data }, 244 { .compatible = "ti,wl1807", .data = &wl18xx_data }, 245 { .compatible = "ti,wl1831", .data = &wl18xx_data }, 246 { .compatible = "ti,wl1835", .data = &wl18xx_data }, 247 { .compatible = "ti,wl1837", .data = &wl18xx_data }, 248 { } 249 }; 250 251 static int wlcore_probe_of(struct device *dev, int *irq, 252 struct wlcore_platdev_data *pdev_data) 253 { 254 struct device_node *np = dev->of_node; 255 const struct of_device_id *of_id; 256 257 of_id = of_match_node(wlcore_sdio_of_match_table, np); 258 if (!of_id) 259 return -ENODEV; 260 261 pdev_data->family = of_id->data; 262 263 *irq = irq_of_parse_and_map(np, 0); 264 if (!*irq) { 265 dev_err(dev, "No irq in platform data\n"); 266 return -EINVAL; 267 } 268 269 /* optional clock frequency params */ 270 of_property_read_u32(np, "ref-clock-frequency", 271 &pdev_data->ref_clock_freq); 272 of_property_read_u32(np, "tcxo-clock-frequency", 273 &pdev_data->tcxo_clock_freq); 274 275 return 0; 276 } 277 #else 278 static int wlcore_probe_of(struct device *dev, int *irq, 279 struct wlcore_platdev_data *pdev_data) 280 { 281 return -ENODATA; 282 } 283 #endif 284 285 static int wl1271_probe(struct sdio_func *func, 286 const struct sdio_device_id *id) 287 { 288 struct wlcore_platdev_data *pdev_data; 289 struct wl12xx_sdio_glue *glue; 290 struct resource res[1]; 291 mmc_pm_flag_t mmcflags; 292 int ret = -ENOMEM; 293 int irq; 294 const char *chip_family; 295 296 /* We are only able to handle the wlan function */ 297 if (func->num != 0x02) 298 return -ENODEV; 299 300 pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL); 301 if (!pdev_data) 302 return -ENOMEM; 303 304 pdev_data->if_ops = &sdio_ops; 305 306 glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL); 307 if (!glue) 308 return -ENOMEM; 309 310 glue->dev = &func->dev; 311 312 /* Grab access to FN0 for ELP reg. */ 313 func->card->quirks |= MMC_QUIRK_LENIENT_FN0; 314 315 /* Use block mode for transferring over one block size of data */ 316 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE; 317 318 ret = wlcore_probe_of(&func->dev, &irq, pdev_data); 319 if (ret) 320 goto out; 321 322 /* if sdio can keep power while host is suspended, enable wow */ 323 mmcflags = sdio_get_host_pm_caps(func); 324 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags); 325 326 if (mmcflags & MMC_PM_KEEP_POWER) 327 pdev_data->pwr_in_suspend = true; 328 329 sdio_set_drvdata(func, glue); 330 331 /* Tell PM core that we don't need the card to be powered now */ 332 pm_runtime_put_noidle(&func->dev); 333 334 /* 335 * Due to a hardware bug, we can't differentiate wl18xx from 336 * wl12xx, because both report the same device ID. The only 337 * way to differentiate is by checking the SDIO revision, 338 * which is 3.00 on the wl18xx chips. 339 */ 340 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00) 341 chip_family = "wl18xx"; 342 else 343 chip_family = "wl12xx"; 344 345 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO); 346 if (!glue->core) { 347 dev_err(glue->dev, "can't allocate platform_device"); 348 ret = -ENOMEM; 349 goto out; 350 } 351 352 glue->core->dev.parent = &func->dev; 353 354 memset(res, 0x00, sizeof(res)); 355 356 res[0].start = irq; 357 res[0].flags = IORESOURCE_IRQ | 358 irqd_get_trigger_type(irq_get_irq_data(irq)); 359 res[0].name = "irq"; 360 361 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res)); 362 if (ret) { 363 dev_err(glue->dev, "can't add resources\n"); 364 goto out_dev_put; 365 } 366 367 ret = platform_device_add_data(glue->core, pdev_data, 368 sizeof(*pdev_data)); 369 if (ret) { 370 dev_err(glue->dev, "can't add platform data\n"); 371 goto out_dev_put; 372 } 373 374 ret = platform_device_add(glue->core); 375 if (ret) { 376 dev_err(glue->dev, "can't add platform device\n"); 377 goto out_dev_put; 378 } 379 return 0; 380 381 out_dev_put: 382 platform_device_put(glue->core); 383 384 out: 385 return ret; 386 } 387 388 static void wl1271_remove(struct sdio_func *func) 389 { 390 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 391 392 /* Undo decrement done above in wl1271_probe */ 393 pm_runtime_get_noresume(&func->dev); 394 395 platform_device_unregister(glue->core); 396 } 397 398 #ifdef CONFIG_PM 399 static int wl1271_suspend(struct device *dev) 400 { 401 /* Tell MMC/SDIO core it's OK to power down the card 402 * (if it isn't already), but not to remove it completely */ 403 struct sdio_func *func = dev_to_sdio_func(dev); 404 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 405 struct wl1271 *wl = platform_get_drvdata(glue->core); 406 mmc_pm_flag_t sdio_flags; 407 int ret = 0; 408 409 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n", 410 wl->wow_enabled); 411 412 /* check whether sdio should keep power */ 413 if (wl->wow_enabled) { 414 sdio_flags = sdio_get_host_pm_caps(func); 415 416 if (!(sdio_flags & MMC_PM_KEEP_POWER)) { 417 dev_err(dev, "can't keep power while host " 418 "is suspended\n"); 419 ret = -EINVAL; 420 goto out; 421 } 422 423 /* keep power while host suspended */ 424 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 425 if (ret) { 426 dev_err(dev, "error while trying to keep power\n"); 427 goto out; 428 } 429 } 430 out: 431 return ret; 432 } 433 434 static int wl1271_resume(struct device *dev) 435 { 436 dev_dbg(dev, "wl1271 resume\n"); 437 438 return 0; 439 } 440 441 static const struct dev_pm_ops wl1271_sdio_pm_ops = { 442 .suspend = wl1271_suspend, 443 .resume = wl1271_resume, 444 }; 445 #endif 446 447 static struct sdio_driver wl1271_sdio_driver = { 448 .name = "wl1271_sdio", 449 .id_table = wl1271_devices, 450 .probe = wl1271_probe, 451 .remove = wl1271_remove, 452 #ifdef CONFIG_PM 453 .drv = { 454 .pm = &wl1271_sdio_pm_ops, 455 }, 456 #endif 457 }; 458 459 static int __init wl1271_init(void) 460 { 461 return sdio_register_driver(&wl1271_sdio_driver); 462 } 463 464 static void __exit wl1271_exit(void) 465 { 466 sdio_unregister_driver(&wl1271_sdio_driver); 467 } 468 469 module_init(wl1271_init); 470 module_exit(wl1271_exit); 471 472 module_param(dump, bool, S_IRUSR | S_IWUSR); 473 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps."); 474 475 MODULE_LICENSE("GPL"); 476 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>"); 477 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); 478