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 < 0) { 159 pm_runtime_put_noidle(&card->dev); 160 dev_err(glue->dev, "%s: failed to get_sync(%d)\n", 161 __func__, ret); 162 163 return ret; 164 } 165 166 sdio_claim_host(func); 167 sdio_enable_func(func); 168 sdio_release_host(func); 169 170 return 0; 171 } 172 173 static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue) 174 { 175 struct sdio_func *func = dev_to_sdio_func(glue->dev); 176 struct mmc_card *card = func->card; 177 int error; 178 179 sdio_claim_host(func); 180 sdio_disable_func(func); 181 sdio_release_host(func); 182 183 /* Let runtime PM know the card is powered off */ 184 error = pm_runtime_put(&card->dev); 185 if (error < 0 && error != -EBUSY) { 186 dev_err(&card->dev, "%s failed: %i\n", __func__, error); 187 188 return error; 189 } 190 191 return 0; 192 } 193 194 static int wl12xx_sdio_set_power(struct device *child, bool enable) 195 { 196 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); 197 198 if (enable) 199 return wl12xx_sdio_power_on(glue); 200 else 201 return wl12xx_sdio_power_off(glue); 202 } 203 204 static struct wl1271_if_operations sdio_ops = { 205 .read = wl12xx_sdio_raw_read, 206 .write = wl12xx_sdio_raw_write, 207 .power = wl12xx_sdio_set_power, 208 .set_block_size = wl1271_sdio_set_block_size, 209 }; 210 211 #ifdef CONFIG_OF 212 213 static const struct wilink_family_data wl127x_data = { 214 .name = "wl127x", 215 .nvs_name = "ti-connectivity/wl127x-nvs.bin", 216 }; 217 218 static const struct wilink_family_data wl128x_data = { 219 .name = "wl128x", 220 .nvs_name = "ti-connectivity/wl128x-nvs.bin", 221 }; 222 223 static const struct wilink_family_data wl18xx_data = { 224 .name = "wl18xx", 225 .cfg_name = "ti-connectivity/wl18xx-conf.bin", 226 .nvs_name = "ti-connectivity/wl1271-nvs.bin", 227 }; 228 229 static const struct of_device_id wlcore_sdio_of_match_table[] = { 230 { .compatible = "ti,wl1271", .data = &wl127x_data }, 231 { .compatible = "ti,wl1273", .data = &wl127x_data }, 232 { .compatible = "ti,wl1281", .data = &wl128x_data }, 233 { .compatible = "ti,wl1283", .data = &wl128x_data }, 234 { .compatible = "ti,wl1285", .data = &wl128x_data }, 235 { .compatible = "ti,wl1801", .data = &wl18xx_data }, 236 { .compatible = "ti,wl1805", .data = &wl18xx_data }, 237 { .compatible = "ti,wl1807", .data = &wl18xx_data }, 238 { .compatible = "ti,wl1831", .data = &wl18xx_data }, 239 { .compatible = "ti,wl1835", .data = &wl18xx_data }, 240 { .compatible = "ti,wl1837", .data = &wl18xx_data }, 241 { } 242 }; 243 244 static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq, 245 struct wlcore_platdev_data *pdev_data) 246 { 247 struct device_node *np = dev->of_node; 248 const struct of_device_id *of_id; 249 250 of_id = of_match_node(wlcore_sdio_of_match_table, np); 251 if (!of_id) 252 return -ENODEV; 253 254 pdev_data->family = of_id->data; 255 256 *irq = irq_of_parse_and_map(np, 0); 257 if (!*irq) { 258 dev_err(dev, "No irq in platform data\n"); 259 return -EINVAL; 260 } 261 262 *wakeirq = irq_of_parse_and_map(np, 1); 263 264 /* optional clock frequency params */ 265 of_property_read_u32(np, "ref-clock-frequency", 266 &pdev_data->ref_clock_freq); 267 of_property_read_u32(np, "tcxo-clock-frequency", 268 &pdev_data->tcxo_clock_freq); 269 270 return 0; 271 } 272 #else 273 static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq, 274 struct wlcore_platdev_data *pdev_data) 275 { 276 return -ENODATA; 277 } 278 #endif 279 280 static int wl1271_probe(struct sdio_func *func, 281 const struct sdio_device_id *id) 282 { 283 struct wlcore_platdev_data *pdev_data; 284 struct wl12xx_sdio_glue *glue; 285 struct resource res[2]; 286 mmc_pm_flag_t mmcflags; 287 int ret = -ENOMEM; 288 int irq, wakeirq, num_irqs; 289 const char *chip_family; 290 291 /* We are only able to handle the wlan function */ 292 if (func->num != 0x02) 293 return -ENODEV; 294 295 pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL); 296 if (!pdev_data) 297 return -ENOMEM; 298 299 pdev_data->if_ops = &sdio_ops; 300 301 glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL); 302 if (!glue) 303 return -ENOMEM; 304 305 glue->dev = &func->dev; 306 307 /* Grab access to FN0 for ELP reg. */ 308 func->card->quirks |= MMC_QUIRK_LENIENT_FN0; 309 310 /* Use block mode for transferring over one block size of data */ 311 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE; 312 313 ret = wlcore_probe_of(&func->dev, &irq, &wakeirq, pdev_data); 314 if (ret) 315 goto out; 316 317 /* if sdio can keep power while host is suspended, enable wow */ 318 mmcflags = sdio_get_host_pm_caps(func); 319 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags); 320 321 if (mmcflags & MMC_PM_KEEP_POWER) 322 pdev_data->pwr_in_suspend = true; 323 324 sdio_set_drvdata(func, glue); 325 326 /* Tell PM core that we don't need the card to be powered now */ 327 pm_runtime_put_noidle(&func->dev); 328 329 /* 330 * Due to a hardware bug, we can't differentiate wl18xx from 331 * wl12xx, because both report the same device ID. The only 332 * way to differentiate is by checking the SDIO revision, 333 * which is 3.00 on the wl18xx chips. 334 */ 335 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00) 336 chip_family = "wl18xx"; 337 else 338 chip_family = "wl12xx"; 339 340 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO); 341 if (!glue->core) { 342 dev_err(glue->dev, "can't allocate platform_device"); 343 ret = -ENOMEM; 344 goto out; 345 } 346 347 glue->core->dev.parent = &func->dev; 348 349 memset(res, 0x00, sizeof(res)); 350 351 res[0].start = irq; 352 res[0].flags = IORESOURCE_IRQ | 353 irqd_get_trigger_type(irq_get_irq_data(irq)); 354 res[0].name = "irq"; 355 356 357 if (wakeirq > 0) { 358 res[1].start = wakeirq; 359 res[1].flags = IORESOURCE_IRQ | 360 irqd_get_trigger_type(irq_get_irq_data(wakeirq)); 361 res[1].name = "wakeirq"; 362 num_irqs = 2; 363 } else { 364 num_irqs = 1; 365 } 366 ret = platform_device_add_resources(glue->core, res, num_irqs); 367 if (ret) { 368 dev_err(glue->dev, "can't add resources\n"); 369 goto out_dev_put; 370 } 371 372 ret = platform_device_add_data(glue->core, pdev_data, 373 sizeof(*pdev_data)); 374 if (ret) { 375 dev_err(glue->dev, "can't add platform data\n"); 376 goto out_dev_put; 377 } 378 379 ret = platform_device_add(glue->core); 380 if (ret) { 381 dev_err(glue->dev, "can't add platform device\n"); 382 goto out_dev_put; 383 } 384 return 0; 385 386 out_dev_put: 387 platform_device_put(glue->core); 388 389 out: 390 return ret; 391 } 392 393 static void wl1271_remove(struct sdio_func *func) 394 { 395 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 396 397 /* Undo decrement done above in wl1271_probe */ 398 pm_runtime_get_noresume(&func->dev); 399 400 platform_device_unregister(glue->core); 401 } 402 403 #ifdef CONFIG_PM 404 static int wl1271_suspend(struct device *dev) 405 { 406 /* Tell MMC/SDIO core it's OK to power down the card 407 * (if it isn't already), but not to remove it completely */ 408 struct sdio_func *func = dev_to_sdio_func(dev); 409 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 410 struct wl1271 *wl = platform_get_drvdata(glue->core); 411 mmc_pm_flag_t sdio_flags; 412 int ret = 0; 413 414 if (!wl) { 415 dev_err(dev, "no wilink module was probed\n"); 416 goto out; 417 } 418 419 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n", 420 wl->wow_enabled); 421 422 /* check whether sdio should keep power */ 423 if (wl->wow_enabled) { 424 sdio_flags = sdio_get_host_pm_caps(func); 425 426 if (!(sdio_flags & MMC_PM_KEEP_POWER)) { 427 dev_err(dev, "can't keep power while host " 428 "is suspended\n"); 429 ret = -EINVAL; 430 goto out; 431 } 432 433 /* keep power while host suspended */ 434 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 435 if (ret) { 436 dev_err(dev, "error while trying to keep power\n"); 437 goto out; 438 } 439 } 440 out: 441 return ret; 442 } 443 444 static int wl1271_resume(struct device *dev) 445 { 446 dev_dbg(dev, "wl1271 resume\n"); 447 448 return 0; 449 } 450 451 static const struct dev_pm_ops wl1271_sdio_pm_ops = { 452 .suspend = wl1271_suspend, 453 .resume = wl1271_resume, 454 }; 455 #endif 456 457 static struct sdio_driver wl1271_sdio_driver = { 458 .name = "wl1271_sdio", 459 .id_table = wl1271_devices, 460 .probe = wl1271_probe, 461 .remove = wl1271_remove, 462 #ifdef CONFIG_PM 463 .drv = { 464 .pm = &wl1271_sdio_pm_ops, 465 }, 466 #endif 467 }; 468 469 static int __init wl1271_init(void) 470 { 471 return sdio_register_driver(&wl1271_sdio_driver); 472 } 473 474 static void __exit wl1271_exit(void) 475 { 476 sdio_unregister_driver(&wl1271_sdio_driver); 477 } 478 479 module_init(wl1271_init); 480 module_exit(wl1271_exit); 481 482 module_param(dump, bool, 0600); 483 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps."); 484 485 MODULE_LICENSE("GPL"); 486 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>"); 487 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); 488