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(dump)) { 85 printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr); 86 print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ", 87 DUMP_PREFIX_OFFSET, 16, 1, 88 buf, len, false); 89 } 90 91 if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) { 92 ((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret); 93 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n", 94 addr, ((u8 *)buf)[0]); 95 } else { 96 if (fixed) 97 ret = sdio_readsb(func, buf, addr, len); 98 else 99 ret = sdio_memcpy_fromio(func, buf, addr, len); 100 101 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n", 102 addr, len); 103 } 104 105 sdio_release_host(func); 106 107 if (WARN_ON(ret)) 108 dev_err(child->parent, "sdio read failed (%d)\n", ret); 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 static const struct of_device_id wlcore_sdio_of_match_table[] = { 220 { .compatible = "ti,wl1271" }, 221 { .compatible = "ti,wl1273" }, 222 { .compatible = "ti,wl1281" }, 223 { .compatible = "ti,wl1283" }, 224 { .compatible = "ti,wl1801" }, 225 { .compatible = "ti,wl1805" }, 226 { .compatible = "ti,wl1807" }, 227 { .compatible = "ti,wl1831" }, 228 { .compatible = "ti,wl1835" }, 229 { .compatible = "ti,wl1837" }, 230 { } 231 }; 232 233 static int wlcore_probe_of(struct device *dev, int *irq, 234 struct wlcore_platdev_data *pdev_data) 235 { 236 struct device_node *np = dev->of_node; 237 238 if (!np || !of_match_node(wlcore_sdio_of_match_table, np)) 239 return -ENODATA; 240 241 *irq = irq_of_parse_and_map(np, 0); 242 if (!*irq) { 243 dev_err(dev, "No irq in platform data\n"); 244 kfree(pdev_data); 245 return -EINVAL; 246 } 247 248 /* optional clock frequency params */ 249 of_property_read_u32(np, "ref-clock-frequency", 250 &pdev_data->ref_clock_freq); 251 of_property_read_u32(np, "tcxo-clock-frequency", 252 &pdev_data->tcxo_clock_freq); 253 254 return 0; 255 } 256 #else 257 static int wlcore_probe_of(struct device *dev, int *irq, 258 struct wlcore_platdev_data *pdev_data) 259 { 260 return -ENODATA; 261 } 262 #endif 263 264 static int wl1271_probe(struct sdio_func *func, 265 const struct sdio_device_id *id) 266 { 267 struct wlcore_platdev_data pdev_data; 268 struct wl12xx_sdio_glue *glue; 269 struct resource res[1]; 270 mmc_pm_flag_t mmcflags; 271 int ret = -ENOMEM; 272 int irq; 273 const char *chip_family; 274 275 /* We are only able to handle the wlan function */ 276 if (func->num != 0x02) 277 return -ENODEV; 278 279 memset(&pdev_data, 0x00, sizeof(pdev_data)); 280 pdev_data.if_ops = &sdio_ops; 281 282 glue = kzalloc(sizeof(*glue), GFP_KERNEL); 283 if (!glue) { 284 dev_err(&func->dev, "can't allocate glue\n"); 285 goto out; 286 } 287 288 glue->dev = &func->dev; 289 290 /* Grab access to FN0 for ELP reg. */ 291 func->card->quirks |= MMC_QUIRK_LENIENT_FN0; 292 293 /* Use block mode for transferring over one block size of data */ 294 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE; 295 296 if (wlcore_probe_of(&func->dev, &irq, &pdev_data)) 297 goto out_free_glue; 298 299 /* if sdio can keep power while host is suspended, enable wow */ 300 mmcflags = sdio_get_host_pm_caps(func); 301 dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags); 302 303 if (mmcflags & MMC_PM_KEEP_POWER) 304 pdev_data.pwr_in_suspend = true; 305 306 sdio_set_drvdata(func, glue); 307 308 /* Tell PM core that we don't need the card to be powered now */ 309 pm_runtime_put_noidle(&func->dev); 310 311 /* 312 * Due to a hardware bug, we can't differentiate wl18xx from 313 * wl12xx, because both report the same device ID. The only 314 * way to differentiate is by checking the SDIO revision, 315 * which is 3.00 on the wl18xx chips. 316 */ 317 if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00) 318 chip_family = "wl18xx"; 319 else 320 chip_family = "wl12xx"; 321 322 glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO); 323 if (!glue->core) { 324 dev_err(glue->dev, "can't allocate platform_device"); 325 ret = -ENOMEM; 326 goto out_free_glue; 327 } 328 329 glue->core->dev.parent = &func->dev; 330 331 memset(res, 0x00, sizeof(res)); 332 333 res[0].start = irq; 334 res[0].flags = IORESOURCE_IRQ | 335 irqd_get_trigger_type(irq_get_irq_data(irq)); 336 res[0].name = "irq"; 337 338 ret = platform_device_add_resources(glue->core, res, ARRAY_SIZE(res)); 339 if (ret) { 340 dev_err(glue->dev, "can't add resources\n"); 341 goto out_dev_put; 342 } 343 344 ret = platform_device_add_data(glue->core, &pdev_data, 345 sizeof(pdev_data)); 346 if (ret) { 347 dev_err(glue->dev, "can't add platform data\n"); 348 goto out_dev_put; 349 } 350 351 ret = platform_device_add(glue->core); 352 if (ret) { 353 dev_err(glue->dev, "can't add platform device\n"); 354 goto out_dev_put; 355 } 356 return 0; 357 358 out_dev_put: 359 platform_device_put(glue->core); 360 361 out_free_glue: 362 kfree(glue); 363 364 out: 365 return ret; 366 } 367 368 static void wl1271_remove(struct sdio_func *func) 369 { 370 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 371 372 /* Undo decrement done above in wl1271_probe */ 373 pm_runtime_get_noresume(&func->dev); 374 375 platform_device_unregister(glue->core); 376 kfree(glue); 377 } 378 379 #ifdef CONFIG_PM 380 static int wl1271_suspend(struct device *dev) 381 { 382 /* Tell MMC/SDIO core it's OK to power down the card 383 * (if it isn't already), but not to remove it completely */ 384 struct sdio_func *func = dev_to_sdio_func(dev); 385 struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func); 386 struct wl1271 *wl = platform_get_drvdata(glue->core); 387 mmc_pm_flag_t sdio_flags; 388 int ret = 0; 389 390 dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n", 391 wl->wow_enabled); 392 393 /* check whether sdio should keep power */ 394 if (wl->wow_enabled) { 395 sdio_flags = sdio_get_host_pm_caps(func); 396 397 if (!(sdio_flags & MMC_PM_KEEP_POWER)) { 398 dev_err(dev, "can't keep power while host " 399 "is suspended\n"); 400 ret = -EINVAL; 401 goto out; 402 } 403 404 /* keep power while host suspended */ 405 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER); 406 if (ret) { 407 dev_err(dev, "error while trying to keep power\n"); 408 goto out; 409 } 410 } 411 out: 412 return ret; 413 } 414 415 static int wl1271_resume(struct device *dev) 416 { 417 dev_dbg(dev, "wl1271 resume\n"); 418 419 return 0; 420 } 421 422 static const struct dev_pm_ops wl1271_sdio_pm_ops = { 423 .suspend = wl1271_suspend, 424 .resume = wl1271_resume, 425 }; 426 #endif 427 428 static struct sdio_driver wl1271_sdio_driver = { 429 .name = "wl1271_sdio", 430 .id_table = wl1271_devices, 431 .probe = wl1271_probe, 432 .remove = wl1271_remove, 433 #ifdef CONFIG_PM 434 .drv = { 435 .pm = &wl1271_sdio_pm_ops, 436 }, 437 #endif 438 }; 439 440 static int __init wl1271_init(void) 441 { 442 return sdio_register_driver(&wl1271_sdio_driver); 443 } 444 445 static void __exit wl1271_exit(void) 446 { 447 sdio_unregister_driver(&wl1271_sdio_driver); 448 } 449 450 module_init(wl1271_init); 451 module_exit(wl1271_exit); 452 453 module_param(dump, bool, S_IRUSR | S_IWUSR); 454 MODULE_PARM_DESC(dump, "Enable sdio read/write dumps."); 455 456 MODULE_LICENSE("GPL"); 457 MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>"); 458 MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>"); 459