wcd934x.c (8280B)
1// SPDX-License-Identifier: GPL-2.0 2// Copyright (c) 2019, Linaro Limited 3 4#include <linux/clk.h> 5#include <linux/gpio/consumer.h> 6#include <linux/interrupt.h> 7#include <linux/kernel.h> 8#include <linux/mfd/core.h> 9#include <linux/mfd/wcd934x/registers.h> 10#include <linux/mfd/wcd934x/wcd934x.h> 11#include <linux/module.h> 12#include <linux/of.h> 13#include <linux/of_irq.h> 14#include <linux/platform_device.h> 15#include <linux/regmap.h> 16#include <linux/regulator/consumer.h> 17#include <linux/slimbus.h> 18 19#define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask) \ 20 [_irq] = { \ 21 .reg_offset = (_off), \ 22 .mask = (_mask), \ 23 .type = { \ 24 .type_reg_offset = (_off), \ 25 .types_supported = IRQ_TYPE_EDGE_BOTH, \ 26 .type_reg_mask = (_mask), \ 27 .type_level_low_val = (_mask), \ 28 .type_level_high_val = (_mask), \ 29 .type_falling_val = 0, \ 30 .type_rising_val = 0, \ 31 }, \ 32 } 33 34static const struct mfd_cell wcd934x_devices[] = { 35 { 36 .name = "wcd934x-codec", 37 }, { 38 .name = "wcd934x-gpio", 39 .of_compatible = "qcom,wcd9340-gpio", 40 }, { 41 .name = "wcd934x-soundwire", 42 .of_compatible = "qcom,soundwire-v1.3.0", 43 }, 44}; 45 46static const struct regmap_irq wcd934x_irqs[] = { 47 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)), 48 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)), 49 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)), 50 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)), 51 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)), 52 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)), 53 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)), 54 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)), 55 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)), 56}; 57 58static const struct regmap_irq_chip wcd934x_regmap_irq_chip = { 59 .name = "wcd934x_irq", 60 .status_base = WCD934X_INTR_PIN1_STATUS0, 61 .mask_base = WCD934X_INTR_PIN1_MASK0, 62 .ack_base = WCD934X_INTR_PIN1_CLEAR0, 63 .type_base = WCD934X_INTR_LEVEL0, 64 .num_type_reg = 4, 65 .type_in_mask = false, 66 .num_regs = 4, 67 .irqs = wcd934x_irqs, 68 .num_irqs = ARRAY_SIZE(wcd934x_irqs), 69}; 70 71static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg) 72{ 73 switch (reg) { 74 case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3: 75 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0: 76 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1: 77 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2: 78 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3: 79 case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS: 80 case WCD934X_ANA_MBHC_RESULT_3: 81 case WCD934X_ANA_MBHC_RESULT_2: 82 case WCD934X_ANA_MBHC_RESULT_1: 83 case WCD934X_ANA_MBHC_MECH: 84 case WCD934X_ANA_MBHC_ELECT: 85 case WCD934X_ANA_MBHC_ZDET: 86 case WCD934X_ANA_MICB2: 87 case WCD934X_ANA_RCO: 88 case WCD934X_ANA_BIAS: 89 return true; 90 default: 91 return false; 92 } 93}; 94 95static const struct regmap_range_cfg wcd934x_ranges[] = { 96 { .name = "WCD934X", 97 .range_min = 0x0, 98 .range_max = WCD934X_MAX_REGISTER, 99 .selector_reg = WCD934X_SEL_REGISTER, 100 .selector_mask = WCD934X_SEL_MASK, 101 .selector_shift = WCD934X_SEL_SHIFT, 102 .window_start = WCD934X_WINDOW_START, 103 .window_len = WCD934X_WINDOW_LENGTH, 104 }, 105}; 106 107static struct regmap_config wcd934x_regmap_config = { 108 .reg_bits = 16, 109 .val_bits = 8, 110 .cache_type = REGCACHE_RBTREE, 111 .max_register = 0xffff, 112 .can_multi_write = true, 113 .ranges = wcd934x_ranges, 114 .num_ranges = ARRAY_SIZE(wcd934x_ranges), 115 .volatile_reg = wcd934x_is_volatile_register, 116}; 117 118static int wcd934x_bring_up(struct wcd934x_ddata *ddata) 119{ 120 struct regmap *regmap = ddata->regmap; 121 u16 id_minor, id_major; 122 int ret; 123 124 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0, 125 (u8 *)&id_minor, sizeof(u16)); 126 if (ret) 127 return ret; 128 129 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2, 130 (u8 *)&id_major, sizeof(u16)); 131 if (ret) 132 return ret; 133 134 dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n", 135 id_major, id_minor); 136 137 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01); 138 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19); 139 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15); 140 /* Add 1msec delay for VOUT to settle */ 141 usleep_range(1000, 1100); 142 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5); 143 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7); 144 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3); 145 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7); 146 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3); 147 148 return 0; 149} 150 151static int wcd934x_slim_status_up(struct slim_device *sdev) 152{ 153 struct device *dev = &sdev->dev; 154 struct wcd934x_ddata *ddata; 155 int ret; 156 157 ddata = dev_get_drvdata(dev); 158 159 ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config); 160 if (IS_ERR(ddata->regmap)) { 161 dev_err(dev, "Error allocating slim regmap\n"); 162 return PTR_ERR(ddata->regmap); 163 } 164 165 ret = wcd934x_bring_up(ddata); 166 if (ret) { 167 dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret); 168 return ret; 169 } 170 171 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, 172 IRQF_TRIGGER_HIGH, 0, 173 &wcd934x_regmap_irq_chip, 174 &ddata->irq_data); 175 if (ret) { 176 dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret); 177 return ret; 178 } 179 180 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices, 181 ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL); 182 if (ret) { 183 dev_err(dev, "Failed to add child devices: err = %d\n", 184 ret); 185 return ret; 186 } 187 188 return ret; 189} 190 191static int wcd934x_slim_status(struct slim_device *sdev, 192 enum slim_device_status status) 193{ 194 switch (status) { 195 case SLIM_DEVICE_STATUS_UP: 196 return wcd934x_slim_status_up(sdev); 197 case SLIM_DEVICE_STATUS_DOWN: 198 mfd_remove_devices(&sdev->dev); 199 break; 200 default: 201 return -EINVAL; 202 } 203 204 return 0; 205} 206 207static int wcd934x_slim_probe(struct slim_device *sdev) 208{ 209 struct device *dev = &sdev->dev; 210 struct device_node *np = dev->of_node; 211 struct wcd934x_ddata *ddata; 212 struct gpio_desc *reset_gpio; 213 int ret; 214 215 ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); 216 if (!ddata) 217 return -ENOMEM; 218 219 ddata->irq = of_irq_get(np, 0); 220 if (ddata->irq < 0) 221 return dev_err_probe(ddata->dev, ddata->irq, 222 "Failed to get IRQ\n"); 223 224 ddata->extclk = devm_clk_get(dev, "extclk"); 225 if (IS_ERR(ddata->extclk)) { 226 dev_err(dev, "Failed to get extclk"); 227 return PTR_ERR(ddata->extclk); 228 } 229 230 ddata->supplies[0].supply = "vdd-buck"; 231 ddata->supplies[1].supply = "vdd-buck-sido"; 232 ddata->supplies[2].supply = "vdd-tx"; 233 ddata->supplies[3].supply = "vdd-rx"; 234 ddata->supplies[4].supply = "vdd-io"; 235 236 ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies); 237 if (ret) { 238 dev_err(dev, "Failed to get supplies: err = %d\n", ret); 239 return ret; 240 } 241 242 ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies); 243 if (ret) { 244 dev_err(dev, "Failed to enable supplies: err = %d\n", ret); 245 return ret; 246 } 247 248 /* 249 * For WCD934X, it takes about 600us for the Vout_A and 250 * Vout_D to be ready after BUCK_SIDO is powered up. 251 * SYS_RST_N shouldn't be pulled high during this time 252 */ 253 usleep_range(600, 650); 254 reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 255 if (IS_ERR(reset_gpio)) { 256 return dev_err_probe(dev, PTR_ERR(reset_gpio), 257 "Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio)); 258 } 259 msleep(20); 260 gpiod_set_value(reset_gpio, 1); 261 msleep(20); 262 263 ddata->dev = dev; 264 dev_set_drvdata(dev, ddata); 265 266 return 0; 267} 268 269static void wcd934x_slim_remove(struct slim_device *sdev) 270{ 271 struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev); 272 273 regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies); 274 mfd_remove_devices(&sdev->dev); 275} 276 277static const struct slim_device_id wcd934x_slim_id[] = { 278 { SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340, 279 SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 }, 280 {} 281}; 282 283static struct slim_driver wcd934x_slim_driver = { 284 .driver = { 285 .name = "wcd934x-slim", 286 }, 287 .probe = wcd934x_slim_probe, 288 .remove = wcd934x_slim_remove, 289 .device_status = wcd934x_slim_status, 290 .id_table = wcd934x_slim_id, 291}; 292 293module_slim_driver(wcd934x_slim_driver); 294MODULE_DESCRIPTION("WCD934X slim driver"); 295MODULE_LICENSE("GPL v2"); 296MODULE_ALIAS("slim:217:250:*"); 297MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");