Qian Zhang | afd8555 | 2020-02-10 15:42:56 +0800 | [diff] [blame] | 1 | /* Copyright (c) 2009-2010, 2013-2020 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> |
Liuliu Zhao | 2a0ec76 | 2018-11-02 17:19:02 +0800 | [diff] [blame] | 30 | #include <linux/of_device.h> |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 31 | |
Qian Zhang | afd8555 | 2020-02-10 15:42:56 +0800 | [diff] [blame] | 32 | #if defined(CONFIG_CNSS_PCI) |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 33 | #include <net/cnss.h> |
| 34 | #endif |
| 35 | |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 36 | #ifdef CONFIG_BTFM_SLIM |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 37 | #include "btfm_slim.h" |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 38 | #endif |
| 39 | |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 40 | #include <linux/fs.h> |
| 41 | |
| 42 | #define BT_PWR_DBG(fmt, arg...) pr_debug("%s: " fmt "\n", __func__, ## arg) |
| 43 | #define BT_PWR_INFO(fmt, arg...) pr_info("%s: " fmt "\n", __func__, ## arg) |
| 44 | #define BT_PWR_ERR(fmt, arg...) pr_err("%s: " fmt "\n", __func__, ## arg) |
| 45 | |
| 46 | |
| 47 | static const struct of_device_id bt_power_match_table[] = { |
| 48 | { .compatible = "qca,ar3002" }, |
| 49 | { .compatible = "qca,qca6174" }, |
Tim Jiang | 4ce7d7b | 2018-05-08 13:34:56 +0800 | [diff] [blame] | 50 | { .compatible = "qca,qca9379" }, |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 51 | { .compatible = "qca,wcn3990" }, |
| 52 | {} |
| 53 | }; |
| 54 | |
| 55 | static struct bluetooth_power_platform_data *bt_power_pdata; |
| 56 | static struct platform_device *btpdev; |
| 57 | static bool previous; |
| 58 | static int pwr_state; |
| 59 | struct class *bt_class; |
| 60 | static int bt_major; |
Satish kumar sugasi | e6b07af | 2018-05-25 17:48:45 -0700 | [diff] [blame] | 61 | static int soc_id; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 62 | |
| 63 | static int bt_vreg_init(struct bt_power_vreg_data *vreg) |
| 64 | { |
| 65 | int rc = 0; |
| 66 | struct device *dev = &btpdev->dev; |
| 67 | |
| 68 | BT_PWR_DBG("vreg_get for : %s", vreg->name); |
| 69 | |
| 70 | /* Get the regulator handle */ |
| 71 | vreg->reg = regulator_get(dev, vreg->name); |
| 72 | if (IS_ERR(vreg->reg)) { |
| 73 | rc = PTR_ERR(vreg->reg); |
| 74 | pr_err("%s: regulator_get(%s) failed. rc=%d\n", |
| 75 | __func__, vreg->name, rc); |
Liuliu Zhao | 35d9dae | 2018-11-15 18:19:40 +0800 | [diff] [blame] | 76 | vreg->reg = NULL; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 77 | goto out; |
| 78 | } |
| 79 | |
| 80 | if ((regulator_count_voltages(vreg->reg) > 0) |
| 81 | && (vreg->low_vol_level) && (vreg->high_vol_level)) |
| 82 | vreg->set_voltage_sup = 1; |
| 83 | |
| 84 | out: |
| 85 | return rc; |
| 86 | } |
| 87 | |
| 88 | static int bt_vreg_enable(struct bt_power_vreg_data *vreg) |
| 89 | { |
| 90 | int rc = 0; |
| 91 | |
| 92 | BT_PWR_DBG("vreg_en for : %s", vreg->name); |
| 93 | |
| 94 | if (!vreg->is_enabled) { |
| 95 | if (vreg->set_voltage_sup) { |
| 96 | rc = regulator_set_voltage(vreg->reg, |
| 97 | vreg->low_vol_level, |
| 98 | vreg->high_vol_level); |
| 99 | if (rc < 0) { |
| 100 | BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n", |
| 101 | vreg->name, rc); |
| 102 | goto out; |
| 103 | } |
| 104 | } |
| 105 | |
| 106 | if (vreg->load_uA >= 0) { |
| 107 | rc = regulator_set_load(vreg->reg, |
| 108 | vreg->load_uA); |
| 109 | if (rc < 0) { |
| 110 | BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n", |
| 111 | vreg->name, rc); |
| 112 | goto out; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | rc = regulator_enable(vreg->reg); |
| 117 | if (rc < 0) { |
| 118 | BT_PWR_ERR("regulator_enable(%s) failed. rc=%d\n", |
| 119 | vreg->name, rc); |
| 120 | goto out; |
| 121 | } |
| 122 | vreg->is_enabled = true; |
| 123 | } |
| 124 | out: |
| 125 | return rc; |
| 126 | } |
| 127 | |
| 128 | static int bt_vreg_disable(struct bt_power_vreg_data *vreg) |
| 129 | { |
| 130 | int rc = 0; |
| 131 | |
| 132 | if (!vreg) |
| 133 | return rc; |
| 134 | |
| 135 | BT_PWR_DBG("vreg_disable for : %s", vreg->name); |
| 136 | |
| 137 | if (vreg->is_enabled) { |
| 138 | rc = regulator_disable(vreg->reg); |
| 139 | if (rc < 0) { |
| 140 | BT_PWR_ERR("regulator_disable(%s) failed. rc=%d\n", |
| 141 | vreg->name, rc); |
| 142 | goto out; |
| 143 | } |
| 144 | vreg->is_enabled = false; |
| 145 | |
| 146 | if (vreg->set_voltage_sup) { |
| 147 | /* Set the min voltage to 0 */ |
| 148 | rc = regulator_set_voltage(vreg->reg, 0, |
| 149 | vreg->high_vol_level); |
| 150 | if (rc < 0) { |
| 151 | BT_PWR_ERR("vreg_set_vol(%s) failed rc=%d\n", |
| 152 | vreg->name, rc); |
| 153 | goto out; |
| 154 | } |
| 155 | } |
| 156 | if (vreg->load_uA >= 0) { |
| 157 | rc = regulator_set_load(vreg->reg, 0); |
| 158 | if (rc < 0) { |
| 159 | BT_PWR_ERR("vreg_set_mode(%s) failed rc=%d\n", |
| 160 | vreg->name, rc); |
| 161 | } |
| 162 | } |
| 163 | } |
| 164 | out: |
| 165 | return rc; |
| 166 | } |
| 167 | |
| 168 | static int bt_configure_vreg(struct bt_power_vreg_data *vreg) |
| 169 | { |
| 170 | int rc = 0; |
| 171 | |
| 172 | BT_PWR_DBG("config %s", vreg->name); |
| 173 | |
| 174 | /* Get the regulator handle for vreg */ |
| 175 | if (!(vreg->reg)) { |
| 176 | rc = bt_vreg_init(vreg); |
| 177 | if (rc < 0) |
| 178 | return rc; |
| 179 | } |
| 180 | rc = bt_vreg_enable(vreg); |
| 181 | |
| 182 | return rc; |
| 183 | } |
| 184 | |
| 185 | static int bt_clk_enable(struct bt_power_clk_data *clk) |
| 186 | { |
| 187 | int rc = 0; |
| 188 | |
| 189 | BT_PWR_DBG("%s", clk->name); |
| 190 | |
| 191 | /* Get the clock handle for vreg */ |
| 192 | if (!clk->clk || clk->is_enabled) { |
| 193 | BT_PWR_ERR("error - node: %p, clk->is_enabled:%d", |
| 194 | clk->clk, clk->is_enabled); |
| 195 | return -EINVAL; |
| 196 | } |
| 197 | |
| 198 | rc = clk_prepare_enable(clk->clk); |
| 199 | if (rc) { |
| 200 | BT_PWR_ERR("failed to enable %s, rc(%d)\n", clk->name, rc); |
| 201 | return rc; |
| 202 | } |
| 203 | |
| 204 | clk->is_enabled = true; |
| 205 | return rc; |
| 206 | } |
| 207 | |
| 208 | static int bt_clk_disable(struct bt_power_clk_data *clk) |
| 209 | { |
| 210 | int rc = 0; |
| 211 | |
| 212 | BT_PWR_DBG("%s", clk->name); |
| 213 | |
| 214 | /* Get the clock handle for vreg */ |
| 215 | if (!clk->clk || !clk->is_enabled) { |
| 216 | BT_PWR_ERR("error - node: %p, clk->is_enabled:%d", |
| 217 | clk->clk, clk->is_enabled); |
| 218 | return -EINVAL; |
| 219 | } |
| 220 | clk_disable_unprepare(clk->clk); |
| 221 | |
| 222 | clk->is_enabled = false; |
| 223 | return rc; |
| 224 | } |
| 225 | |
| 226 | static int bt_configure_gpios(int on) |
| 227 | { |
| 228 | int rc = 0; |
| 229 | int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst; |
| 230 | |
| 231 | BT_PWR_DBG("bt_gpio= %d on: %d", bt_reset_gpio, on); |
| 232 | |
| 233 | if (on) { |
| 234 | rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n"); |
| 235 | if (rc) { |
| 236 | BT_PWR_ERR("unable to request gpio %d (%d)\n", |
| 237 | bt_reset_gpio, rc); |
| 238 | return rc; |
| 239 | } |
| 240 | |
| 241 | rc = gpio_direction_output(bt_reset_gpio, 0); |
| 242 | if (rc) { |
| 243 | BT_PWR_ERR("Unable to set direction\n"); |
| 244 | return rc; |
| 245 | } |
| 246 | msleep(50); |
| 247 | rc = gpio_direction_output(bt_reset_gpio, 1); |
| 248 | if (rc) { |
| 249 | BT_PWR_ERR("Unable to set direction\n"); |
| 250 | return rc; |
| 251 | } |
| 252 | msleep(50); |
| 253 | } else { |
| 254 | gpio_set_value(bt_reset_gpio, 0); |
| 255 | msleep(100); |
| 256 | } |
| 257 | return rc; |
| 258 | } |
| 259 | |
| 260 | static int bluetooth_power(int on) |
| 261 | { |
| 262 | int rc = 0; |
| 263 | |
| 264 | BT_PWR_DBG("on: %d", on); |
| 265 | |
| 266 | if (on) { |
| 267 | if (bt_power_pdata->bt_vdd_io) { |
| 268 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_io); |
| 269 | if (rc < 0) { |
| 270 | BT_PWR_ERR("bt_power vddio config failed"); |
| 271 | goto out; |
| 272 | } |
| 273 | } |
| 274 | if (bt_power_pdata->bt_vdd_xtal) { |
| 275 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_xtal); |
| 276 | if (rc < 0) { |
| 277 | BT_PWR_ERR("bt_power vddxtal config failed"); |
| 278 | goto vdd_xtal_fail; |
| 279 | } |
| 280 | } |
| 281 | if (bt_power_pdata->bt_vdd_core) { |
| 282 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_core); |
| 283 | if (rc < 0) { |
| 284 | BT_PWR_ERR("bt_power vddcore config failed"); |
| 285 | goto vdd_core_fail; |
| 286 | } |
| 287 | } |
| 288 | if (bt_power_pdata->bt_vdd_pa) { |
| 289 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_pa); |
| 290 | if (rc < 0) { |
| 291 | BT_PWR_ERR("bt_power vddpa config failed"); |
| 292 | goto vdd_pa_fail; |
| 293 | } |
| 294 | } |
| 295 | if (bt_power_pdata->bt_vdd_ldo) { |
| 296 | rc = bt_configure_vreg(bt_power_pdata->bt_vdd_ldo); |
| 297 | if (rc < 0) { |
| 298 | BT_PWR_ERR("bt_power vddldo config failed"); |
| 299 | goto vdd_ldo_fail; |
| 300 | } |
| 301 | } |
| 302 | if (bt_power_pdata->bt_chip_pwd) { |
| 303 | rc = bt_configure_vreg(bt_power_pdata->bt_chip_pwd); |
| 304 | if (rc < 0) { |
| 305 | BT_PWR_ERR("bt_power chippwd config failed"); |
| 306 | goto chip_pwd_fail; |
| 307 | } |
| 308 | } |
| 309 | /* Parse dt_info and check if a target requires clock voting. |
| 310 | * Enable BT clock when BT is on and disable it when BT is off |
| 311 | */ |
| 312 | if (bt_power_pdata->bt_chip_clk) { |
| 313 | rc = bt_clk_enable(bt_power_pdata->bt_chip_clk); |
| 314 | if (rc < 0) { |
| 315 | BT_PWR_ERR("bt_power gpio config failed"); |
| 316 | goto clk_fail; |
| 317 | } |
| 318 | } |
| 319 | if (bt_power_pdata->bt_gpio_sys_rst > 0) { |
| 320 | rc = bt_configure_gpios(on); |
| 321 | if (rc < 0) { |
| 322 | BT_PWR_ERR("bt_power gpio config failed"); |
| 323 | goto gpio_fail; |
| 324 | } |
| 325 | } |
| 326 | } else { |
| 327 | if (bt_power_pdata->bt_gpio_sys_rst > 0) |
| 328 | bt_configure_gpios(on); |
| 329 | gpio_fail: |
| 330 | if (bt_power_pdata->bt_gpio_sys_rst > 0) |
| 331 | gpio_free(bt_power_pdata->bt_gpio_sys_rst); |
| 332 | if (bt_power_pdata->bt_chip_clk) |
| 333 | bt_clk_disable(bt_power_pdata->bt_chip_clk); |
| 334 | clk_fail: |
| 335 | if (bt_power_pdata->bt_chip_pwd) |
| 336 | bt_vreg_disable(bt_power_pdata->bt_chip_pwd); |
| 337 | chip_pwd_fail: |
| 338 | if (bt_power_pdata->bt_vdd_ldo) |
| 339 | bt_vreg_disable(bt_power_pdata->bt_vdd_ldo); |
| 340 | vdd_ldo_fail: |
| 341 | if (bt_power_pdata->bt_vdd_pa) |
| 342 | bt_vreg_disable(bt_power_pdata->bt_vdd_pa); |
| 343 | vdd_pa_fail: |
| 344 | if (bt_power_pdata->bt_vdd_core) |
| 345 | bt_vreg_disable(bt_power_pdata->bt_vdd_core); |
| 346 | vdd_core_fail: |
| 347 | if (bt_power_pdata->bt_vdd_xtal) |
| 348 | bt_vreg_disable(bt_power_pdata->bt_vdd_xtal); |
| 349 | vdd_xtal_fail: |
| 350 | if (bt_power_pdata->bt_vdd_io) |
| 351 | bt_vreg_disable(bt_power_pdata->bt_vdd_io); |
| 352 | } |
| 353 | out: |
| 354 | return rc; |
| 355 | } |
| 356 | |
| 357 | static int bluetooth_toggle_radio(void *data, bool blocked) |
| 358 | { |
| 359 | int ret = 0; |
| 360 | int (*power_control)(int enable); |
| 361 | |
| 362 | power_control = |
| 363 | ((struct bluetooth_power_platform_data *)data)->bt_power_setup; |
| 364 | |
| 365 | if (previous != blocked) |
| 366 | ret = (*power_control)(!blocked); |
| 367 | if (!ret) |
| 368 | previous = blocked; |
| 369 | return ret; |
| 370 | } |
| 371 | |
| 372 | static const struct rfkill_ops bluetooth_power_rfkill_ops = { |
| 373 | .set_block = bluetooth_toggle_radio, |
| 374 | }; |
| 375 | |
Qian Zhang | afd8555 | 2020-02-10 15:42:56 +0800 | [diff] [blame] | 376 | #if defined(CONFIG_CNSS_PCI) |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 377 | static ssize_t enable_extldo(struct device *dev, struct device_attribute *attr, |
| 378 | char *buf) |
| 379 | { |
| 380 | int ret; |
| 381 | bool enable = false; |
| 382 | struct cnss_platform_cap cap; |
| 383 | |
| 384 | ret = cnss_get_platform_cap(&cap); |
| 385 | if (ret) { |
| 386 | BT_PWR_ERR("Platform capability info from CNSS not available!"); |
| 387 | enable = false; |
| 388 | } else if (!ret && (cap.cap_flag & CNSS_HAS_EXTERNAL_SWREG)) { |
| 389 | enable = true; |
| 390 | } |
| 391 | return snprintf(buf, 6, "%s", (enable ? "true" : "false")); |
| 392 | } |
| 393 | #else |
| 394 | static ssize_t enable_extldo(struct device *dev, struct device_attribute *attr, |
| 395 | char *buf) |
| 396 | { |
| 397 | return snprintf(buf, 6, "%s", "false"); |
| 398 | } |
| 399 | #endif |
| 400 | |
| 401 | static DEVICE_ATTR(extldo, 0444, enable_extldo, NULL); |
| 402 | |
| 403 | static int bluetooth_power_rfkill_probe(struct platform_device *pdev) |
| 404 | { |
| 405 | struct rfkill *rfkill; |
| 406 | int ret; |
| 407 | |
| 408 | rfkill = rfkill_alloc("bt_power", &pdev->dev, RFKILL_TYPE_BLUETOOTH, |
| 409 | &bluetooth_power_rfkill_ops, |
| 410 | pdev->dev.platform_data); |
| 411 | |
| 412 | if (!rfkill) { |
| 413 | dev_err(&pdev->dev, "rfkill allocate failed\n"); |
| 414 | return -ENOMEM; |
| 415 | } |
| 416 | |
| 417 | /* add file into rfkill0 to handle LDO27 */ |
| 418 | ret = device_create_file(&pdev->dev, &dev_attr_extldo); |
| 419 | if (ret < 0) |
| 420 | BT_PWR_ERR("device create file error!"); |
| 421 | |
| 422 | /* force Bluetooth off during init to allow for user control */ |
| 423 | rfkill_init_sw_state(rfkill, 1); |
| 424 | previous = 1; |
| 425 | |
| 426 | ret = rfkill_register(rfkill); |
| 427 | if (ret) { |
| 428 | dev_err(&pdev->dev, "rfkill register failed=%d\n", ret); |
| 429 | rfkill_destroy(rfkill); |
| 430 | return ret; |
| 431 | } |
| 432 | |
| 433 | platform_set_drvdata(pdev, rfkill); |
| 434 | |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | static void bluetooth_power_rfkill_remove(struct platform_device *pdev) |
| 439 | { |
| 440 | struct rfkill *rfkill; |
| 441 | |
| 442 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 443 | |
| 444 | rfkill = platform_get_drvdata(pdev); |
| 445 | if (rfkill) |
| 446 | rfkill_unregister(rfkill); |
| 447 | rfkill_destroy(rfkill); |
| 448 | platform_set_drvdata(pdev, NULL); |
| 449 | } |
| 450 | |
| 451 | #define MAX_PROP_SIZE 32 |
| 452 | static int bt_dt_parse_vreg_info(struct device *dev, |
| 453 | struct bt_power_vreg_data **vreg_data, const char *vreg_name) |
| 454 | { |
| 455 | int len, ret = 0; |
| 456 | const __be32 *prop; |
| 457 | char prop_name[MAX_PROP_SIZE]; |
| 458 | struct bt_power_vreg_data *vreg; |
| 459 | struct device_node *np = dev->of_node; |
| 460 | |
| 461 | BT_PWR_DBG("vreg dev tree parse for %s", vreg_name); |
| 462 | |
| 463 | *vreg_data = NULL; |
| 464 | snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", vreg_name); |
| 465 | if (of_parse_phandle(np, prop_name, 0)) { |
| 466 | vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL); |
| 467 | if (!vreg) { |
| 468 | dev_err(dev, "No memory for vreg: %s\n", vreg_name); |
| 469 | ret = -ENOMEM; |
| 470 | goto err; |
| 471 | } |
| 472 | |
| 473 | vreg->name = vreg_name; |
| 474 | |
| 475 | /* Parse voltage-level from each node */ |
| 476 | snprintf(prop_name, MAX_PROP_SIZE, |
| 477 | "%s-voltage-level", vreg_name); |
| 478 | prop = of_get_property(np, prop_name, &len); |
| 479 | if (!prop || (len != (2 * sizeof(__be32)))) { |
| 480 | dev_warn(dev, "%s %s property\n", |
| 481 | prop ? "invalid format" : "no", prop_name); |
| 482 | } else { |
| 483 | vreg->low_vol_level = be32_to_cpup(&prop[0]); |
| 484 | vreg->high_vol_level = be32_to_cpup(&prop[1]); |
| 485 | } |
| 486 | |
| 487 | /* Parse current-level from each node */ |
| 488 | snprintf(prop_name, MAX_PROP_SIZE, |
| 489 | "%s-current-level", vreg_name); |
| 490 | ret = of_property_read_u32(np, prop_name, &vreg->load_uA); |
| 491 | if (ret < 0) { |
| 492 | BT_PWR_DBG("%s property is not valid\n", prop_name); |
| 493 | vreg->load_uA = -1; |
| 494 | ret = 0; |
| 495 | } |
| 496 | |
| 497 | *vreg_data = vreg; |
| 498 | BT_PWR_DBG("%s: vol=[%d %d]uV, current=[%d]uA\n", |
| 499 | vreg->name, vreg->low_vol_level, |
| 500 | vreg->high_vol_level, |
| 501 | vreg->load_uA); |
| 502 | } else |
| 503 | BT_PWR_INFO("%s: is not provided in device tree", vreg_name); |
| 504 | |
| 505 | err: |
| 506 | return ret; |
| 507 | } |
| 508 | |
| 509 | static int bt_dt_parse_clk_info(struct device *dev, |
| 510 | struct bt_power_clk_data **clk_data) |
| 511 | { |
Balakrishna Godavarthi | b3a9345 | 2019-11-20 15:53:40 +0530 | [diff] [blame] | 512 | int ret = 0; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 513 | struct bt_power_clk_data *clk = NULL; |
| 514 | struct device_node *np = dev->of_node; |
| 515 | |
| 516 | BT_PWR_DBG(""); |
| 517 | |
| 518 | *clk_data = NULL; |
| 519 | if (of_parse_phandle(np, "clocks", 0)) { |
| 520 | clk = devm_kzalloc(dev, sizeof(*clk), GFP_KERNEL); |
| 521 | if (!clk) { |
| 522 | BT_PWR_ERR("No memory for clocks"); |
| 523 | ret = -ENOMEM; |
| 524 | goto err; |
| 525 | } |
| 526 | |
| 527 | /* Allocated 20 bytes size buffer for clock name string */ |
| 528 | clk->name = devm_kzalloc(dev, 20, GFP_KERNEL); |
| 529 | |
| 530 | /* Parse clock name from node */ |
| 531 | ret = of_property_read_string_index(np, "clock-names", 0, |
| 532 | &(clk->name)); |
| 533 | if (ret < 0) { |
| 534 | BT_PWR_ERR("reading \"clock-names\" failed"); |
| 535 | return ret; |
| 536 | } |
| 537 | |
| 538 | clk->clk = devm_clk_get(dev, clk->name); |
| 539 | if (IS_ERR(clk->clk)) { |
| 540 | ret = PTR_ERR(clk->clk); |
| 541 | BT_PWR_ERR("failed to get %s, ret (%d)", |
| 542 | clk->name, ret); |
| 543 | clk->clk = NULL; |
| 544 | return ret; |
| 545 | } |
| 546 | |
| 547 | *clk_data = clk; |
| 548 | } else { |
Balakrishna Godavarthi | b3a9345 | 2019-11-20 15:53:40 +0530 | [diff] [blame] | 549 | BT_PWR_INFO("clocks is not provided in device tree"); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 550 | } |
| 551 | |
| 552 | err: |
| 553 | return ret; |
| 554 | } |
| 555 | |
| 556 | static int bt_power_populate_dt_pinfo(struct platform_device *pdev) |
| 557 | { |
| 558 | int rc; |
| 559 | |
| 560 | BT_PWR_DBG(""); |
| 561 | |
| 562 | if (!bt_power_pdata) |
| 563 | return -ENOMEM; |
| 564 | |
| 565 | if (pdev->dev.of_node) { |
| 566 | bt_power_pdata->bt_gpio_sys_rst = |
| 567 | of_get_named_gpio(pdev->dev.of_node, |
| 568 | "qca,bt-reset-gpio", 0); |
| 569 | if (bt_power_pdata->bt_gpio_sys_rst < 0) |
Balakrishna Godavarthi | b3a9345 | 2019-11-20 15:53:40 +0530 | [diff] [blame] | 570 | BT_PWR_INFO("bt-reset-gpio not provided in devicetree"); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 571 | |
| 572 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 573 | &bt_power_pdata->bt_vdd_core, |
| 574 | "qca,bt-vdd-core"); |
| 575 | if (rc < 0) |
| 576 | BT_PWR_ERR("bt-vdd-core not provided in device tree"); |
| 577 | |
| 578 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 579 | &bt_power_pdata->bt_vdd_io, |
| 580 | "qca,bt-vdd-io"); |
| 581 | if (rc < 0) |
| 582 | BT_PWR_ERR("bt-vdd-io not provided in device tree"); |
| 583 | |
| 584 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 585 | &bt_power_pdata->bt_vdd_xtal, |
| 586 | "qca,bt-vdd-xtal"); |
| 587 | if (rc < 0) |
| 588 | BT_PWR_ERR("bt-vdd-xtal not provided in device tree"); |
| 589 | |
| 590 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 591 | &bt_power_pdata->bt_vdd_pa, |
| 592 | "qca,bt-vdd-pa"); |
| 593 | if (rc < 0) |
| 594 | BT_PWR_ERR("bt-vdd-pa not provided in device tree"); |
| 595 | |
| 596 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 597 | &bt_power_pdata->bt_vdd_ldo, |
| 598 | "qca,bt-vdd-ldo"); |
| 599 | if (rc < 0) |
| 600 | BT_PWR_ERR("bt-vdd-ldo not provided in device tree"); |
| 601 | |
| 602 | rc = bt_dt_parse_vreg_info(&pdev->dev, |
| 603 | &bt_power_pdata->bt_chip_pwd, |
| 604 | "qca,bt-chip-pwd"); |
| 605 | if (rc < 0) |
| 606 | BT_PWR_ERR("bt-chip-pwd not provided in device tree"); |
| 607 | |
| 608 | rc = bt_dt_parse_clk_info(&pdev->dev, |
| 609 | &bt_power_pdata->bt_chip_clk); |
| 610 | if (rc < 0) |
| 611 | BT_PWR_ERR("clock not provided in device tree"); |
| 612 | } |
| 613 | |
| 614 | bt_power_pdata->bt_power_setup = bluetooth_power; |
| 615 | |
| 616 | return 0; |
| 617 | } |
| 618 | |
Junlin Zhang | 043fdc2 | 2019-08-07 11:05:58 +0800 | [diff] [blame] | 619 | static int get_bt_reset_gpio_value(void) |
| 620 | { |
| 621 | int rc = 0; |
| 622 | int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst; |
| 623 | |
| 624 | rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n"); |
| 625 | if (rc) { |
| 626 | BT_PWR_ERR("unable to request gpio %d (%d)\n", |
| 627 | bt_reset_gpio, rc); |
| 628 | return rc; |
| 629 | } |
| 630 | |
| 631 | rc = gpio_get_value(bt_reset_gpio); |
| 632 | gpio_free(bt_power_pdata->bt_gpio_sys_rst); |
| 633 | return rc; |
| 634 | } |
| 635 | |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 636 | static int bt_power_probe(struct platform_device *pdev) |
| 637 | { |
| 638 | int ret = 0; |
Liuliu Zhao | 2a0ec76 | 2018-11-02 17:19:02 +0800 | [diff] [blame] | 639 | const struct of_device_id *of_id = |
| 640 | of_match_device(bt_power_match_table, &pdev->dev); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 641 | |
| 642 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 643 | |
| 644 | bt_power_pdata = |
| 645 | kzalloc(sizeof(struct bluetooth_power_platform_data), |
| 646 | GFP_KERNEL); |
| 647 | |
| 648 | if (!bt_power_pdata) { |
| 649 | BT_PWR_ERR("Failed to allocate memory"); |
| 650 | return -ENOMEM; |
| 651 | } |
| 652 | |
| 653 | if (pdev->dev.of_node) { |
| 654 | ret = bt_power_populate_dt_pinfo(pdev); |
| 655 | if (ret < 0) { |
| 656 | BT_PWR_ERR("Failed to populate device tree info"); |
| 657 | goto free_pdata; |
| 658 | } |
| 659 | pdev->dev.platform_data = bt_power_pdata; |
| 660 | } else if (pdev->dev.platform_data) { |
| 661 | /* Optional data set to default if not provided */ |
| 662 | if (!((struct bluetooth_power_platform_data *) |
| 663 | (pdev->dev.platform_data))->bt_power_setup) |
| 664 | ((struct bluetooth_power_platform_data *) |
| 665 | (pdev->dev.platform_data))->bt_power_setup = |
| 666 | bluetooth_power; |
| 667 | |
| 668 | memcpy(bt_power_pdata, pdev->dev.platform_data, |
| 669 | sizeof(struct bluetooth_power_platform_data)); |
| 670 | pwr_state = 0; |
| 671 | } else { |
| 672 | BT_PWR_ERR("Failed to get platform data"); |
| 673 | goto free_pdata; |
| 674 | } |
| 675 | |
| 676 | if (bluetooth_power_rfkill_probe(pdev) < 0) |
| 677 | goto free_pdata; |
| 678 | |
| 679 | btpdev = pdev; |
| 680 | |
Liuliu Zhao | 2a0ec76 | 2018-11-02 17:19:02 +0800 | [diff] [blame] | 681 | if (of_id) { |
Junlin Zhang | ad22df3 | 2019-08-23 16:01:24 +0800 | [diff] [blame] | 682 | if ((strcmp(of_id->compatible, "qca,qca6174") == 0) && |
| 683 | (get_bt_reset_gpio_value() == BT_RESET_GPIO_HIGH_VAL)) { |
Liuliu Zhao | 2a0ec76 | 2018-11-02 17:19:02 +0800 | [diff] [blame] | 684 | bluetooth_toggle_radio(pdev->dev.platform_data, 0); |
| 685 | bluetooth_toggle_radio(pdev->dev.platform_data, 1); |
| 686 | } |
| 687 | } |
| 688 | |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 689 | return 0; |
| 690 | |
| 691 | free_pdata: |
| 692 | kfree(bt_power_pdata); |
| 693 | return ret; |
| 694 | } |
| 695 | |
| 696 | static int bt_power_remove(struct platform_device *pdev) |
| 697 | { |
| 698 | dev_dbg(&pdev->dev, "%s\n", __func__); |
| 699 | |
| 700 | bluetooth_power_rfkill_remove(pdev); |
| 701 | |
Bandari Ramesh | f8b58cc | 2018-07-09 14:39:05 +0530 | [diff] [blame] | 702 | if (bt_power_pdata->bt_chip_pwd) |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 703 | regulator_put(bt_power_pdata->bt_chip_pwd->reg); |
| 704 | |
| 705 | kfree(bt_power_pdata); |
| 706 | |
| 707 | return 0; |
| 708 | } |
| 709 | |
| 710 | int bt_register_slimdev(struct device *dev) |
| 711 | { |
| 712 | BT_PWR_DBG(""); |
| 713 | if (!bt_power_pdata || (dev == NULL)) { |
| 714 | BT_PWR_ERR("Failed to allocate memory"); |
| 715 | return -EINVAL; |
| 716 | } |
| 717 | bt_power_pdata->slim_dev = dev; |
| 718 | return 0; |
| 719 | } |
| 720 | |
Satish kumar sugasi | e6b07af | 2018-05-25 17:48:45 -0700 | [diff] [blame] | 721 | int get_chipset_version(void) |
| 722 | { |
| 723 | BT_PWR_DBG(""); |
| 724 | return soc_id; |
| 725 | } |
| 726 | |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 727 | static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 728 | { |
| 729 | int ret = 0, pwr_cntrl = 0; |
Satish kumar sugasi | e6b07af | 2018-05-25 17:48:45 -0700 | [diff] [blame] | 730 | int chipset_version = 0; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 731 | |
| 732 | switch (cmd) { |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 733 | #ifdef CONFIG_BTFM_SLIM |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 734 | case BT_CMD_SLIM_TEST: |
| 735 | if (!bt_power_pdata->slim_dev) { |
| 736 | BT_PWR_ERR("slim_dev is null\n"); |
| 737 | return -EINVAL; |
| 738 | } |
| 739 | ret = btfm_slim_hw_init( |
| 740 | bt_power_pdata->slim_dev->platform_data |
| 741 | ); |
| 742 | break; |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 743 | #endif |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 744 | case BT_CMD_PWR_CTRL: |
| 745 | pwr_cntrl = (int)arg; |
| 746 | BT_PWR_ERR("BT_CMD_PWR_CTRL pwr_cntrl:%d", pwr_cntrl); |
| 747 | if (pwr_state != pwr_cntrl) { |
| 748 | ret = bluetooth_power(pwr_cntrl); |
| 749 | if (!ret) |
| 750 | pwr_state = pwr_cntrl; |
| 751 | } else { |
| 752 | BT_PWR_ERR("BT chip state is already :%d no change d\n" |
| 753 | , pwr_state); |
Rupesh Tatiya | 03a5d4f | 2017-05-08 10:36:19 +0530 | [diff] [blame] | 754 | ret = 0; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 755 | } |
| 756 | break; |
Satish kumar sugasi | e6b07af | 2018-05-25 17:48:45 -0700 | [diff] [blame] | 757 | case BT_CMD_CHIPSET_VERS: |
| 758 | chipset_version = (int)arg; |
| 759 | BT_PWR_ERR("BT_CMD_CHIP_VERS soc_version:%x", chipset_version); |
| 760 | if (chipset_version) { |
| 761 | soc_id = chipset_version; |
| 762 | } else { |
| 763 | BT_PWR_ERR("got invalid soc version"); |
| 764 | soc_id = 0; |
| 765 | } |
| 766 | break; |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 767 | default: |
| 768 | return -EINVAL; |
| 769 | } |
| 770 | return ret; |
| 771 | } |
| 772 | |
| 773 | static struct platform_driver bt_power_driver = { |
| 774 | .probe = bt_power_probe, |
| 775 | .remove = bt_power_remove, |
| 776 | .driver = { |
| 777 | .name = "bt_power", |
| 778 | .owner = THIS_MODULE, |
| 779 | .of_match_table = bt_power_match_table, |
| 780 | }, |
| 781 | }; |
| 782 | |
| 783 | static const struct file_operations bt_dev_fops = { |
| 784 | .owner = THIS_MODULE, |
| 785 | .unlocked_ioctl = bt_ioctl, |
| 786 | .compat_ioctl = bt_ioctl, |
| 787 | }; |
| 788 | |
| 789 | static int __init bluetooth_power_init(void) |
| 790 | { |
| 791 | int ret; |
| 792 | |
| 793 | ret = platform_driver_register(&bt_power_driver); |
| 794 | |
| 795 | bt_major = register_chrdev(0, "bt", &bt_dev_fops); |
| 796 | if (bt_major < 0) { |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 797 | BT_PWR_ERR("failed to allocate char dev\n"); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 798 | goto chrdev_unreg; |
| 799 | } |
| 800 | |
| 801 | bt_class = class_create(THIS_MODULE, "bt-dev"); |
| 802 | if (IS_ERR(bt_class)) { |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 803 | BT_PWR_ERR("coudn't create class"); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 804 | goto chrdev_unreg; |
| 805 | } |
| 806 | |
| 807 | |
| 808 | if (device_create(bt_class, NULL, MKDEV(bt_major, 0), |
| 809 | NULL, "btpower") == NULL) { |
Junlin Zhang | d3a1033 | 2019-10-18 10:05:41 +0800 | [diff] [blame] | 810 | BT_PWR_ERR("failed to allocate char dev\n"); |
Mahesh Kumar Sharma | 41a4d38 | 2017-01-17 17:00:51 -0800 | [diff] [blame] | 811 | goto chrdev_unreg; |
| 812 | } |
| 813 | return 0; |
| 814 | |
| 815 | chrdev_unreg: |
| 816 | unregister_chrdev(bt_major, "bt"); |
| 817 | class_destroy(bt_class); |
| 818 | return ret; |
| 819 | } |
| 820 | |
| 821 | static void __exit bluetooth_power_exit(void) |
| 822 | { |
| 823 | platform_driver_unregister(&bt_power_driver); |
| 824 | } |
| 825 | |
| 826 | MODULE_LICENSE("GPL v2"); |
| 827 | MODULE_DESCRIPTION("MSM Bluetooth power control driver"); |
| 828 | |
| 829 | module_init(bluetooth_power_init); |
| 830 | module_exit(bluetooth_power_exit); |