Tim Jiang | 4ce7d7b | 2018-05-08 13:34:56 +0800 | [diff] [blame] | 1 | /* Copyright (c) 2009-2010, 2013-2018 The Linux Foundation. All rights reserved. |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | /* |
| 13 | * Bluetooth Power Switch Module |
| 14 | * controls power to external Bluetooth device |
| 15 | * with interface to power management device |
| 16 | */ |
| 17 | |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/platform_device.h> |
| 22 | #include <linux/rfkill.h> |
| 23 | #include <linux/gpio.h> |
| 24 | #include <linux/of_gpio.h> |
| 25 | #include <linux/delay.h> |
| 26 | #include <linux/bluetooth-power.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/regulator/consumer.h> |
| 29 | #include <linux/clk.h> |
| 30 | |
| 31 | #if defined(CONFIG_CNSS) |
| 32 | #include <net/cnss.h> |
| 33 | #endif |
| 34 | |
| 35 | #include "btfm_slim.h" |
| 36 | #include <linux/fs.h> |
| 37 | |
| 38 | #define BT_PWR_DBG(fmt, arg...) pr_debug("%s: " fmt "\n", __func__, ## arg) |
| 39 | #define BT_PWR_INFO(fmt, arg...) pr_info("%s: " fmt "\n", __func__, ## arg) |
| 40 | #define BT_PWR_ERR(fmt, arg...) pr_err("%s: " fmt "\n", __func__, ## arg) |
| 41 | |
| 42 | |
| 43 | static const struct of_device_id bt_power_match_table[] = { |
| 44 | { .compatible = "qca,ar3002" }, |
| 45 | { .compatible = "qca,qca6174" }, |
Tim Jiang | 4ce7d7b | 2018-05-08 13:34:56 +0800 | [diff] [blame] | 46 | { .compatible = "qca,qca9379" }, |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 47 | { .compatible = "qca,wcn3990" }, |
| 48 | {} |
| 49 | }; |
| 50 | |
| 51 | static struct bluetooth_power_platform_data *bt_power_pdata; |
| 52 | static struct platform_device *btpdev; |
| 53 | static bool previous; |
| 54 | static int pwr_state; |
| 55 | struct class *bt_class; |
| 56 | static int bt_major; |
| 57 | |
| 58 | static int bt_vreg_init(struct bt_power_vreg_data *vreg) |
| 59 | { |
| 60 | int rc = 0; |
| 61 | struct device *dev = &btpdev->dev; |
| 62 | |
| 63 | BT_PWR_DBG("vreg_get for : %s", vreg->name); |
| 64 | |
| 65 | /* Get the regulator handle */ |
| 66 | vreg->reg = regulator_get(dev, vreg->name); |
| 67 | if (IS_ERR(vreg->reg)) { |
| 68 | rc = PTR_ERR(vreg->reg); |
| 69 | pr_err("%s: regulator_get(%s) failed. rc=%d\n", |
| 70 | __func__, vreg->name, rc); |
| 71 | goto out; |
| 72 | } |
| 73 | |
| 74 | if ((regulator_count_voltages(vreg->reg) > 0) |
| 75 | && (vreg->low_vol_level) && (vreg->high_vol_level)) |
| 76 | vreg->set_voltage_sup = 1; |
| 77 | |
| 78 | out: |
| 79 | return rc; |
| 80 | } |
| 81 | |
| 82 | static int bt_vreg_enable(struct bt_power_vreg_data *vreg) |
| 83 | { |
| 84 | int rc = 0; |
| 85 | |
| 86 | BT_PWR_DBG("vreg_en for : %s", vreg->name); |
| 87 | |
| 88 | if (!vreg->is_enabled) { |
| 89 | if (vreg->set_voltage_sup) { |
| 90 | rc = regulator_set_voltage(vreg->reg, |
| 91 | vreg->low_vol_level, |
| 92 | vreg->high_vol_level); |
| 93 | if (rc < 0) { |
| 94 | BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n", |
| 95 | vreg->name, rc); |
| 96 | goto out; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | if (vreg->load_uA >= 0) { |
| 101 | rc = regulator_set_load(vreg->reg, |
| 102 | vreg->load_uA); |
| 103 | if (rc < 0) { |
| 104 | BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n", |
| 105 | vreg->name, rc); |
| 106 | goto out; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | rc = regulator_enable(vreg->reg); |
| 111 | if (rc < 0) { |
| 112 | BT_PWR_ERR("regulator_enable(%s) failed. rc=%d\n", |
| 113 | vreg->name, rc); |
| 114 | goto out; |
| 115 | } |
| 116 | vreg->is_enabled = true; |
| 117 | } |
| 118 | out: |
| 119 | return rc; |
| 120 | } |
| 121 | |
| 122 | static int bt_vreg_disable(struct bt_power_vreg_data *vreg) |
| 123 | { |
| 124 | int rc = 0; |
| 125 | |
| 126 | if (!vreg) |
| 127 | return rc; |
| 128 | |
| 129 | BT_PWR_DBG("vreg_disable for : %s", vreg->name); |
| 130 | |
| 131 | if (vreg->is_enabled) { |
| 132 | rc = regulator_disable(vreg->reg); |
| 133 | if (rc < 0) { |
| 134 | BT_PWR_ERR("regulator_disable(%s) failed. rc=%d\n", |
| 135 | vreg->name, rc); |
| 136 | goto out; |
| 137 | } |
| 138 | vreg->is_enabled = false; |
| 139 | |
| 140 | if (vreg->set_voltage_sup) { |
| 141 | /* Set the min voltage to 0 */ |
| 142 | rc = regulator_set_voltage(vreg->reg, 0, |
| 143 | vreg->high_vol_level); |
| 144 | if (rc < 0) { |
| 145 | BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n", |
| 146 | vreg->name, rc); |
| 147 | goto out; |
| 148 | } |
| 149 | } |
| 150 | if (vreg->load_uA >= 0) { |
| 151 | rc = regulator_set_load(vreg->reg, 0); |
| 152 | if (rc < 0) { |
| 153 | BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n", |
| 154 | vreg->name, rc); |
| 155 | } |
| 156 | } |
| 157 | } |
| 158 | out: |
| 159 | return rc; |
| 160 | } |
| 161 | |
| 162 | static int bt_configure_vreg(struct bt_power_vreg_data *vreg) |
| 163 | { |
| 164 | int rc = 0; |
| 165 | |
| 166 | BT_PWR_DBG("config %s", vreg->name); |
| 167 | |
| 168 | /* Get the regulator handle for vreg */ |
| 169 | if (!(vreg->reg)) { |
| 170 | rc = bt_vreg_init(vreg); |
| 171 | if (rc < 0) |
| 172 | return rc; |
| 173 | } |
| 174 | rc = bt_vreg_enable(vreg); |
| 175 | |
| 176 | return rc; |
| 177 | } |
| 178 | |
| 179 | static int bt_clk_enable(struct bt_power_clk_data *clk) |
| 180 | { |
| 181 | int rc = 0; |
| 182 | |
| 183 | BT_PWR_DBG("%s", clk->name); |
| 184 | |
| 185 | /* Get the clock handle for vreg */ |
| 186 | if (!clk->clk || clk->is_enabled) { |
| 187 | BT_PWR_ERR("error - node: %p, clk->is_enabled:%d", |
| 188 | clk->clk, clk->is_enabled); |
| 189 | return -EINVAL; |
| 190 | } |
| 191 | |
| 192 | rc = clk_prepare_enable(clk->clk); |
| 193 | if (rc) { |
| 194 | BT_PWR_ERR("failed to enable %s, rc(%d)\n", clk->name, rc); |
| 195 | return rc; |
| 196 | } |
| 197 | |
| 198 | clk->is_enabled = true; |
| 199 | return rc; |
| 200 | } |
| 201 | |
| 202 | static int bt_clk_disable(struct bt_power_clk_data *clk) |
| 203 | { |
| 204 | int rc = 0; |
| 205 | |
| 206 | BT_PWR_DBG("%s", clk->name); |
| 207 | |
| 208 | /* Get the clock handle for vreg */ |
| 209 | if (!clk->clk || !clk->is_enabled) { |
| 210 | BT_PWR_ERR("error - node: %p, clk->is_enabled:%d", |
| 211 | clk->clk, clk->is_enabled); |
| 212 | return -EINVAL; |
| 213 | } |
| 214 | clk_disable_unprepare(clk->clk); |
| 215 | |
| 216 | clk->is_enabled = false; |
| 217 | return rc; |
| 218 | } |
| 219 | |
| 220 | static int bt_configure_gpios(int on) |
| 221 | { |
| 222 | int rc = 0; |
| 223 | int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst; |
| 224 | |
| 225 | BT_PWR_DBG("bt_gpio= %d on: %d", bt_reset_gpio, on); |
| 226 | |
| 227 | if (on) { |
| 228 | rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n"); |
| 229 | if (rc) { |
| 230 | BT_PWR_ERR("unable to request gpio %d (%d)\n", |
| 231 | bt_reset_gpio, rc); |
| 232 | return rc; |
| 233 | } |
| 234 | |
| 235 | rc = gpio_direction_output(bt_reset_gpio, 0); |
| 236 | if (rc) { |
| 237 | BT_PWR_ERR("Unable to set direction\n"); |
| 238 | return rc; |
| 239 | } |
| 240 | msleep(50); |
| 241 | rc = gpio_direction_output(bt_reset_gpio, 1); |
| 242 | if (rc) { |
| 243 | BT_PWR_ERR("Unable to set direction\n"); |
| 244 | return rc; |
| 245 | } |
| 246 | msleep(50); |
| 247 | } else { |
| 248 | gpio_set_value(bt_reset_gpio, 0); |
| 249 | msleep(100); |
| 250 | } |
| 251 | return rc; |
| 252 | } |
| 253 | |
| 254 | static int bluetooth_power(int on) |
| 255 | { |
| 256 | int rc = 0; |
| 257 | |
| 258 | BT_PWR_DBG("on: %d", on); |
| 259 | |
| 260 | if (on) { |
| 261 | if (bt_power_pdata->bt_vdd_io) { |
| 262 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_io); |
| 263 | if (rc < 0) { |
| 264 | BT_PWR_ERR("bt_power vddio config failed"); |
| 265 | goto out; |
| 266 | } |
| 267 | } |
| 268 | if (bt_power_pdata->bt_vdd_xtal) { |
| 269 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_xtal); |
| 270 | if (rc < 0) { |
| 271 | BT_PWR_ERR("bt_power vddxtal config failed"); |
| 272 | goto vdd_xtal_fail; |
| 273 | } |
| 274 | } |
| 275 | if (bt_power_pdata->bt_vdd_core) { |
| 276 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_core); |
| 277 | if (rc < 0) { |
| 278 | BT_PWR_ERR("bt_power vddcore config failed"); |
| 279 | goto vdd_core_fail; |
| 280 | } |
| 281 | } |
| 282 | if (bt_power_pdata->bt_vdd_pa) { |
| 283 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_pa); |
| 284 | if (rc < 0) { |
| 285 | BT_PWR_ERR("bt_power vddpa config failed"); |
| 286 | goto vdd_pa_fail; |
| 287 | } |
| 288 | } |
| 289 | if (bt_power_pdata->bt_vdd_ldo) { |
| 290 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_ldo); |
| 291 | if (rc < 0) { |
| 292 | BT_PWR_ERR("bt_power vddldo config failed"); |
| 293 | goto vdd_ldo_fail; |
| 294 | } |
| 295 | } |
| 296 | if (bt_power_pdata->bt_chip_pwd) { |
| 297 | rc = bt_configure_vreg(bt_power_pdata->bt_chip_pwd); |
| 298 | if (rc < 0) { |
| 299 | BT_PWR_ERR("bt_power chippwd config failed"); |
| 300 | goto chip_pwd_fail; |
| 301 | } |
| 302 | } |
| 303 | /* Parse dt_info and check if a target requires clock voting. |
| 304 | * Enable BT clock when BT is on and disable it when BT is off |
| 305 | */ |
| 306 | if (bt_power_pdata->bt_chip_clk) { |
| 307 | rc = bt_clk_enable(bt_power_pdata->bt_chip_clk); |
| 308 | if (rc < 0) { |
| 309 | BT_PWR_ERR("bt_power gpio config failed"); |
| 310 | goto clk_fail; |
| 311 | } |
| 312 | } |
| 313 | if (bt_power_pdata->bt_gpio_sys_rst > 0) { |
| 314 | rc = bt_configure_gpios(on); |
| 315 | if (rc < 0) { |
| 316 | BT_PWR_ERR("bt_power gpio config failed"); |
| 317 | goto gpio_fail; |
| 318 | } |
| 319 | } |
| 320 | } else { |
| 321 | if (bt_power_pdata->bt_gpio_sys_rst > 0) |
| 322 | bt_configure_gpios(on); |
| 323 | gpio_fail: |
| 324 | if (bt_power_pdata->bt_gpio_sys_rst > 0) |
| 325 | gpio_free(bt_power_pdata->bt_gpio_sys_rst); |
| 326 | if (bt_power_pdata->bt_chip_clk) |
| 327 | bt_clk_disable(bt_power_pdata->bt_chip_clk); |
| 328 | clk_fail: |
| 329 | if (bt_power_pdata->bt_chip_pwd) |
| 330 | bt_vreg_disable(bt_power_pdata->bt_chip_pwd); |
| 331 | chip_pwd_fail: |
| 332 | if (bt_power_pdata->bt_vdd_ldo) |
| 333 | bt_vreg_disable(bt_power_pdata->bt_vdd_ldo); |
| 334 | vdd_ldo_fail: |
| 335 | if (bt_power_pdata->bt_vdd_pa) |
| 336 | bt_vreg_disable(bt_power_pdata->bt_vdd_pa); |
| 337 | vdd_pa_fail: |
| 338 | if (bt_power_pdata->bt_vdd_core) |
| 339 | bt_vreg_disable(bt_power_pdata->bt_vdd_core); |
| 340 | vdd_core_fail: |
| 341 | if (bt_power_pdata->bt_vdd_xtal) |
| 342 | bt_vreg_disable(bt_power_pdata->bt_vdd_xtal); |
| 343 | vdd_xtal_fail: |
| 344 | if (bt_power_pdata->bt_vdd_io) |
| 345 | bt_vreg_disable(bt_power_pdata->bt_vdd_io); |
| 346 | } |
| 347 | out: |
| 348 | return rc; |
| 349 | } |
| 350 | |
| 351 | static int bluetooth_toggle_radio(void *data, bool blocked) |
| 352 | { |
| 353 | int ret = 0; |
| 354 | int (*power_control)(int enable); |
| 355 | |
| 356 | power_control = |
| 357 | ((struct bluetooth_power_platform_data *)data)->bt_power_setup; |
| 358 | |
| 359 | if (previous != blocked) |
| 360 | ret = (*power_control)(!blocked); |
| 361 | if (!ret) |
| 362 | previous = blocked; |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | static const struct rfkill_ops bluetooth_power_rfkill_ops = { |
| 367 | .set_block = bluetooth_toggle_radio, |
| 368 | }; |
| 369 | |
| 370 | #if defined(CONFIG_CNSS) && defined(CONFIG_CLD_LL_CORE) |
| 371 | static ssize_t enable_extldo(struct device *dev, struct device_attribute *attr, |
| 372 | char *buf) |
| 373 | { |
| 374 | int ret; |
| 375 | bool enable = false; |
| 376 | struct cnss_platform_cap cap; |
| 377 | |
| 378 | ret = cnss_get_platform_cap(&cap); |
| 379 | if (ret) { |
| 380 | BT_PWR_ERR("Platform capability info from CNSS not available!"); |
| 381 | enable = false; |
| 382 | } else if (!ret && (cap.cap_flag & CNSS_HAS_EXTERNAL_SWREG)) { |
| 383 | enable = true; |
| 384 | } |
| 385 | return snprintf(buf, 6, "%s", (enable ? "true" : "false")); |
| 386 | } |
| 387 | #else |
| 388 | static ssize_t enable_extldo(struct device *dev, struct device_attribute *attr, |
| 389 | char *buf) |
| 390 | { |
| 391 | return snprintf(buf, 6, "%s", "false"); |
| 392 | } |
| 393 | #endif |
| 394 | |
| 395 | static DEVICE_ATTR(extldo, 0444, enable_extldo, NULL); |
| 396 | |
| 397 | static int bluetooth_power_rfkill_probe(struct platform_device *pdev) |
| 398 | { |
| 399 | struct rfkill *rfkill; |
| 400 | int ret; |
| 401 | |
| 402 | rfkill = rfkill_alloc("bt_power", &pdev->dev, RFKILL_TYPE_BLUETOOTH, |
| 403 | &bluetooth_power_rfkill_ops, |
| 404 | pdev->dev.platform_data); |
| 405 | |
| 406 | if (!rfkill) { |
| 407 | dev_err(&pdev->dev, "rfkill allocate failed\n"); |
| 408 | return -ENOMEM; |
| 409 | } |
| 410 | |
| 411 | /* add file into rfkill0 to handle LDO27 */ |
| 412 | ret = device_create_file(&pdev->dev, &dev_attr_extldo); |
| 413 | if (ret < 0) |
| 414 | BT_PWR_ERR("device create file error!"); |
| 415 | |
| 416 | /* force Bluetooth off during init to allow for user control */ |
| 417 | rfkill_init_sw_state(rfkill, 1); |
| 418 | previous = 1; |
| 419 | |
| 420 | ret = rfkill_register(rfkill); |
| 421 | if (ret) { |
| 422 | dev_err(&pdev->dev, "rfkill register failed=%d\n", ret); |
| 423 | rfkill_destroy(rfkill); |
| 424 | return ret; |
| 425 | } |
| 426 | |
| 427 | platform_set_drvdata(pdev, rfkill); |
| 428 | |
| 429 | return 0; |
| 430 | } |
| 431 | |
| 432 | static void bluetooth_power_rfkill_remove(struct platform_device *pdev) |
| 433 | { |
| 434 | struct rfkill *rfkill; |
| 435 | |
| 436 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 437 | |
| 438 | rfkill = platform_get_drvdata(pdev); |
| 439 | if (rfkill) |
| 440 | rfkill_unregister(rfkill); |
| 441 | rfkill_destroy(rfkill); |
| 442 | platform_set_drvdata(pdev, NULL); |
| 443 | } |
| 444 | |
| 445 | #define MAX_PROP_SIZE 32 |
| 446 | static int bt_dt_parse_vreg_info(struct device *dev, |
| 447 | struct bt_power_vreg_data **vreg_data, const char *vreg_name) |
| 448 | { |
| 449 | int len, ret = 0; |
| 450 | const __be32 *prop; |
| 451 | char prop_name[MAX_PROP_SIZE]; |
| 452 | struct bt_power_vreg_data *vreg; |
| 453 | struct device_node *np = dev->of_node; |
| 454 | |
| 455 | BT_PWR_DBG("vreg dev tree parse for %s", vreg_name); |
| 456 | |
| 457 | *vreg_data = NULL; |
| 458 | snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", vreg_name); |
| 459 | if (of_parse_phandle(np, prop_name, 0)) { |
| 460 | vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL); |
| 461 | if (!vreg) { |
| 462 | dev_err(dev, "No memory for vreg: %s\n", vreg_name); |
| 463 | ret = -ENOMEM; |
| 464 | goto err; |
| 465 | } |
| 466 | |
| 467 | vreg->name = vreg_name; |
| 468 | |
| 469 | /* Parse voltage-level from each node */ |
| 470 | snprintf(prop_name, MAX_PROP_SIZE, |
| 471 | "%s-voltage-level", vreg_name); |
| 472 | prop = of_get_property(np, prop_name, &len); |
| 473 | if (!prop || (len != (2 * sizeof(__be32)))) { |
| 474 | dev_warn(dev, "%s %s property\n", |
| 475 | prop ? "invalid format" : "no", prop_name); |
| 476 | } else { |
| 477 | vreg->low_vol_level = be32_to_cpup(&prop[0]); |
| 478 | vreg->high_vol_level = be32_to_cpup(&prop[1]); |
| 479 | } |
| 480 | |
| 481 | /* Parse current-level from each node */ |
| 482 | snprintf(prop_name, MAX_PROP_SIZE, |
| 483 | "%s-current-level", vreg_name); |
| 484 | ret = of_property_read_u32(np, prop_name, &vreg->load_uA); |
| 485 | if (ret < 0) { |
| 486 | BT_PWR_DBG("%s property is not valid\n", prop_name); |
| 487 | vreg->load_uA = -1; |
| 488 | ret = 0; |
| 489 | } |
| 490 | |
| 491 | *vreg_data = vreg; |
| 492 | BT_PWR_DBG("%s: vol=[%d %d]uV, current=[%d]uA\n", |
| 493 | vreg->name, vreg->low_vol_level, |
| 494 | vreg->high_vol_level, |
| 495 | vreg->load_uA); |
| 496 | } else |
| 497 | BT_PWR_INFO("%s: is not provided in device tree", vreg_name); |
| 498 | |
| 499 | err: |
| 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | static int bt_dt_parse_clk_info(struct device *dev, |
| 504 | struct bt_power_clk_data **clk_data) |
| 505 | { |
| 506 | int ret = -EINVAL; |
| 507 | struct bt_power_clk_data *clk = NULL; |
| 508 | struct device_node *np = dev->of_node; |
| 509 | |
| 510 | BT_PWR_DBG(""); |
| 511 | |
| 512 | *clk_data = NULL; |
| 513 | if (of_parse_phandle(np, "clocks", 0)) { |
| 514 | clk = devm_kzalloc(dev, sizeof(*clk), GFP_KERNEL); |
| 515 | if (!clk) { |
| 516 | BT_PWR_ERR("No memory for clocks"); |
| 517 | ret = -ENOMEM; |
| 518 | goto err; |
| 519 | } |
| 520 | |
| 521 | /* Allocated 20 bytes size buffer for clock name string */ |
| 522 | clk->name = devm_kzalloc(dev, 20, GFP_KERNEL); |
| 523 | |
| 524 | /* Parse clock name from node */ |
| 525 | ret = of_property_read_string_index(np, "clock-names", 0, |
| 526 | &(clk->name)); |
| 527 | if (ret < 0) { |
| 528 | BT_PWR_ERR("reading \"clock-names\" failed"); |
| 529 | return ret; |
| 530 | } |
| 531 | |
| 532 | clk->clk = devm_clk_get(dev, clk->name); |
| 533 | if (IS_ERR(clk->clk)) { |
| 534 | ret = PTR_ERR(clk->clk); |
| 535 | BT_PWR_ERR("failed to get %s, ret (%d)", |
| 536 | clk->name, ret); |
| 537 | clk->clk = NULL; |
| 538 | return ret; |
| 539 | } |
| 540 | |
| 541 | *clk_data = clk; |
| 542 | } else { |
| 543 | BT_PWR_ERR("clocks is not provided in device tree"); |
| 544 | } |
| 545 | |
| 546 | err: |
| 547 | return ret; |
| 548 | } |
| 549 | |
| 550 | static int bt_power_populate_dt_pinfo(struct platform_device *pdev) |
| 551 | { |
| 552 | int rc; |
| 553 | |
| 554 | BT_PWR_DBG(""); |
| 555 | |
| 556 | if (!bt_power_pdata) |
| 557 | return -ENOMEM; |
| 558 | |
| 559 | if (pdev->dev.of_node) { |
| 560 | bt_power_pdata->bt_gpio_sys_rst = |
| 561 | of_get_named_gpio(pdev->dev.of_node, |
| 562 | "qca,bt-reset-gpio", 0); |
| 563 | if (bt_power_pdata->bt_gpio_sys_rst < 0) |
| 564 | BT_PWR_ERR("bt-reset-gpio not provided in device tree"); |
| 565 | |
| 566 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 567 | &bt_power_pdata->bt_vdd_core, |
| 568 | "qca,bt-vdd-core"); |
| 569 | if (rc < 0) |
| 570 | BT_PWR_ERR("bt-vdd-core not provided in device tree"); |
| 571 | |
| 572 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 573 | &bt_power_pdata->bt_vdd_io, |
| 574 | "qca,bt-vdd-io"); |
| 575 | if (rc < 0) |
| 576 | BT_PWR_ERR("bt-vdd-io not provided in device tree"); |
| 577 | |
| 578 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 579 | &bt_power_pdata->bt_vdd_xtal, |
| 580 | "qca,bt-vdd-xtal"); |
| 581 | if (rc < 0) |
| 582 | BT_PWR_ERR("bt-vdd-xtal not provided in device tree"); |
| 583 | |
| 584 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 585 | &bt_power_pdata->bt_vdd_pa, |
| 586 | "qca,bt-vdd-pa"); |
| 587 | if (rc < 0) |
| 588 | BT_PWR_ERR("bt-vdd-pa not provided in device tree"); |
| 589 | |
| 590 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 591 | &bt_power_pdata->bt_vdd_ldo, |
| 592 | "qca,bt-vdd-ldo"); |
| 593 | if (rc < 0) |
| 594 | BT_PWR_ERR("bt-vdd-ldo not provided in device tree"); |
| 595 | |
| 596 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 597 | &bt_power_pdata->bt_chip_pwd, |
| 598 | "qca,bt-chip-pwd"); |
| 599 | if (rc < 0) |
| 600 | BT_PWR_ERR("bt-chip-pwd not provided in device tree"); |
| 601 | |
| 602 | rc = bt_dt_parse_clk_info(&pdev->dev, |
| 603 | &bt_power_pdata->bt_chip_clk); |
| 604 | if (rc < 0) |
| 605 | BT_PWR_ERR("clock not provided in device tree"); |
| 606 | } |
| 607 | |
| 608 | bt_power_pdata->bt_power_setup = bluetooth_power; |
| 609 | |
| 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | static int bt_power_probe(struct platform_device *pdev) |
| 614 | { |
| 615 | int ret = 0; |
| 616 | |
| 617 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 618 | |
| 619 | bt_power_pdata = |
| 620 | kzalloc(sizeof(struct bluetooth_power_platform_data), |
| 621 | GFP_KERNEL); |
| 622 | |
| 623 | if (!bt_power_pdata) { |
| 624 | BT_PWR_ERR("Failed to allocate memory"); |
| 625 | return -ENOMEM; |
| 626 | } |
| 627 | |
| 628 | if (pdev->dev.of_node) { |
| 629 | ret = bt_power_populate_dt_pinfo(pdev); |
| 630 | if (ret < 0) { |
| 631 | BT_PWR_ERR("Failed to populate device tree info"); |
| 632 | goto free_pdata; |
| 633 | } |
| 634 | pdev->dev.platform_data = bt_power_pdata; |
| 635 | } else if (pdev->dev.platform_data) { |
| 636 | /* Optional data set to default if not provided */ |
| 637 | if (!((struct bluetooth_power_platform_data *) |
| 638 | (pdev->dev.platform_data))->bt_power_setup) |
| 639 | ((struct bluetooth_power_platform_data *) |
| 640 | (pdev->dev.platform_data))->bt_power_setup = |
| 641 | bluetooth_power; |
| 642 | |
| 643 | memcpy(bt_power_pdata, pdev->dev.platform_data, |
| 644 | sizeof(struct bluetooth_power_platform_data)); |
| 645 | pwr_state = 0; |
| 646 | } else { |
| 647 | BT_PWR_ERR("Failed to get platform data"); |
| 648 | goto free_pdata; |
| 649 | } |
| 650 | |
| 651 | if (bluetooth_power_rfkill_probe(pdev) < 0) |
| 652 | goto free_pdata; |
| 653 | |
| 654 | btpdev = pdev; |
| 655 | |
| 656 | return 0; |
| 657 | |
| 658 | free_pdata: |
| 659 | kfree(bt_power_pdata); |
| 660 | return ret; |
| 661 | } |
| 662 | |
| 663 | static int bt_power_remove(struct platform_device *pdev) |
| 664 | { |
| 665 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 666 | |
| 667 | bluetooth_power_rfkill_remove(pdev); |
| 668 | |
Bandari Ramesh | f8b58cc | 2018-07-09 14:39:05 +0530 | [diff] [blame] | 669 | if (bt_power_pdata->bt_chip_pwd) |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 670 | regulator_put(bt_power_pdata->bt_chip_pwd->reg); |
| 671 | |
| 672 | kfree(bt_power_pdata); |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | int bt_register_slimdev(struct device *dev) |
| 678 | { |
| 679 | BT_PWR_DBG(""); |
| 680 | if (!bt_power_pdata || (dev == NULL)) { |
| 681 | BT_PWR_ERR("Failed to allocate memory"); |
| 682 | return -EINVAL; |
| 683 | } |
| 684 | bt_power_pdata->slim_dev = dev; |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 689 | { |
| 690 | int ret = 0, pwr_cntrl = 0; |
| 691 | |
| 692 | switch (cmd) { |
| 693 | case BT_CMD_SLIM_TEST: |
| 694 | if (!bt_power_pdata->slim_dev) { |
| 695 | BT_PWR_ERR("slim_dev is null\n"); |
| 696 | return -EINVAL; |
| 697 | } |
| 698 | ret = btfm_slim_hw_init( |
| 699 | bt_power_pdata->slim_dev->platform_data |
| 700 | ); |
| 701 | break; |
| 702 | case BT_CMD_PWR_CTRL: |
| 703 | pwr_cntrl = (int)arg; |
| 704 | BT_PWR_ERR("BT_CMD_PWR_CTRL pwr_cntrl:%d", pwr_cntrl); |
| 705 | if (pwr_state != pwr_cntrl) { |
| 706 | ret = bluetooth_power(pwr_cntrl); |
| 707 | if (!ret) |
| 708 | pwr_state = pwr_cntrl; |
| 709 | } else { |
| 710 | BT_PWR_ERR("BT chip state is already :%d no change d\n" |
| 711 | , pwr_state); |
Rupesh Tatiya | 03a5d4f | 2017-05-08 10:36:19 +0530 | [diff] [blame] | 712 | ret = 0; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 713 | } |
| 714 | break; |
| 715 | default: |
| 716 | return -EINVAL; |
| 717 | } |
| 718 | return ret; |
| 719 | } |
| 720 | |
| 721 | static struct platform_driver bt_power_driver = { |
| 722 | .probe = bt_power_probe, |
| 723 | .remove = bt_power_remove, |
| 724 | .driver = { |
| 725 | .name = "bt_power", |
| 726 | .owner = THIS_MODULE, |
| 727 | .of_match_table = bt_power_match_table, |
| 728 | }, |
| 729 | }; |
| 730 | |
| 731 | static const struct file_operations bt_dev_fops = { |
| 732 | .owner = THIS_MODULE, |
| 733 | .unlocked_ioctl = bt_ioctl, |
| 734 | .compat_ioctl = bt_ioctl, |
| 735 | }; |
| 736 | |
| 737 | static int __init bluetooth_power_init(void) |
| 738 | { |
| 739 | int ret; |
| 740 | |
| 741 | ret = platform_driver_register(&bt_power_driver); |
| 742 | |
| 743 | bt_major = register_chrdev(0, "bt", &bt_dev_fops); |
| 744 | if (bt_major < 0) { |
| 745 | BTFMSLIM_ERR("failed to allocate char dev\n"); |
| 746 | goto chrdev_unreg; |
| 747 | } |
| 748 | |
| 749 | bt_class = class_create(THIS_MODULE, "bt-dev"); |
| 750 | if (IS_ERR(bt_class)) { |
| 751 | BTFMSLIM_ERR("coudn't create class"); |
| 752 | goto chrdev_unreg; |
| 753 | } |
| 754 | |
| 755 | |
| 756 | if (device_create(bt_class, NULL, MKDEV(bt_major, 0), |
| 757 | NULL, "btpower") == NULL) { |
| 758 | BTFMSLIM_ERR("failed to allocate char dev\n"); |
| 759 | goto chrdev_unreg; |
| 760 | } |
| 761 | return 0; |
| 762 | |
| 763 | chrdev_unreg: |
| 764 | unregister_chrdev(bt_major, "bt"); |
| 765 | class_destroy(bt_class); |
| 766 | return ret; |
| 767 | } |
| 768 | |
| 769 | static void __exit bluetooth_power_exit(void) |
| 770 | { |
| 771 | platform_driver_unregister(&bt_power_driver); |
| 772 | } |
| 773 | |
| 774 | MODULE_LICENSE("GPL v2"); |
| 775 | MODULE_DESCRIPTION("MSM Bluetooth power control driver"); |
| 776 | |
| 777 | module_init(bluetooth_power_init); |
| 778 | module_exit(bluetooth_power_exit); |