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 34 static 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 46 static 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 58 static const unsigned int wcd934x_config_regs[] = { 59 WCD934X_INTR_LEVEL0, 60 }; 61 62 static const struct regmap_irq_chip wcd934x_regmap_irq_chip = { 63 .name = "wcd934x_irq", 64 .status_base = WCD934X_INTR_PIN1_STATUS0, 65 .mask_base = WCD934X_INTR_PIN1_MASK0, 66 .ack_base = WCD934X_INTR_PIN1_CLEAR0, 67 .num_regs = 4, 68 .irqs = wcd934x_irqs, 69 .num_irqs = ARRAY_SIZE(wcd934x_irqs), 70 .config_base = wcd934x_config_regs, 71 .num_config_bases = ARRAY_SIZE(wcd934x_config_regs), 72 .num_config_regs = 4, 73 .set_type_config = regmap_irq_set_type_config_simple, 74 }; 75 76 static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg) 77 { 78 switch (reg) { 79 case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3: 80 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0: 81 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1: 82 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2: 83 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3: 84 case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS: 85 case WCD934X_ANA_MBHC_RESULT_3: 86 case WCD934X_ANA_MBHC_RESULT_2: 87 case WCD934X_ANA_MBHC_RESULT_1: 88 case WCD934X_ANA_MBHC_MECH: 89 case WCD934X_ANA_MBHC_ELECT: 90 case WCD934X_ANA_MBHC_ZDET: 91 case WCD934X_ANA_MICB2: 92 case WCD934X_ANA_RCO: 93 case WCD934X_ANA_BIAS: 94 return true; 95 default: 96 return false; 97 } 98 }; 99 100 static const struct regmap_range_cfg wcd934x_ranges[] = { 101 { .name = "WCD934X", 102 .range_min = 0x0, 103 .range_max = WCD934X_MAX_REGISTER, 104 .selector_reg = WCD934X_SEL_REGISTER, 105 .selector_mask = WCD934X_SEL_MASK, 106 .selector_shift = WCD934X_SEL_SHIFT, 107 .window_start = WCD934X_WINDOW_START, 108 .window_len = WCD934X_WINDOW_LENGTH, 109 }, 110 }; 111 112 static struct regmap_config wcd934x_regmap_config = { 113 .reg_bits = 16, 114 .val_bits = 8, 115 .cache_type = REGCACHE_RBTREE, 116 .max_register = 0xffff, 117 .can_multi_write = true, 118 .ranges = wcd934x_ranges, 119 .num_ranges = ARRAY_SIZE(wcd934x_ranges), 120 .volatile_reg = wcd934x_is_volatile_register, 121 }; 122 123 static int wcd934x_bring_up(struct wcd934x_ddata *ddata) 124 { 125 struct regmap *regmap = ddata->regmap; 126 u16 id_minor, id_major; 127 int ret; 128 129 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0, 130 (u8 *)&id_minor, sizeof(u16)); 131 if (ret) 132 return ret; 133 134 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2, 135 (u8 *)&id_major, sizeof(u16)); 136 if (ret) 137 return ret; 138 139 dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n", 140 id_major, id_minor); 141 142 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01); 143 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19); 144 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15); 145 /* Add 1msec delay for VOUT to settle */ 146 usleep_range(1000, 1100); 147 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5); 148 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7); 149 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3); 150 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7); 151 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3); 152 153 return 0; 154 } 155 156 static int wcd934x_slim_status_up(struct slim_device *sdev) 157 { 158 struct device *dev = &sdev->dev; 159 struct wcd934x_ddata *ddata; 160 int ret; 161 162 ddata = dev_get_drvdata(dev); 163 164 ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config); 165 if (IS_ERR(ddata->regmap)) { 166 dev_err(dev, "Error allocating slim regmap\n"); 167 return PTR_ERR(ddata->regmap); 168 } 169 170 ret = wcd934x_bring_up(ddata); 171 if (ret) { 172 dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret); 173 return ret; 174 } 175 176 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, 177 IRQF_TRIGGER_HIGH, 0, 178 &wcd934x_regmap_irq_chip, 179 &ddata->irq_data); 180 if (ret) { 181 dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret); 182 return ret; 183 } 184 185 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices, 186 ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL); 187 if (ret) { 188 dev_err(dev, "Failed to add child devices: err = %d\n", 189 ret); 190 return ret; 191 } 192 193 return ret; 194 } 195 196 static int wcd934x_slim_status(struct slim_device *sdev, 197 enum slim_device_status status) 198 { 199 switch (status) { 200 case SLIM_DEVICE_STATUS_UP: 201 return wcd934x_slim_status_up(sdev); 202 case SLIM_DEVICE_STATUS_DOWN: 203 mfd_remove_devices(&sdev->dev); 204 break; 205 default: 206 return -EINVAL; 207 } 208 209 return 0; 210 } 211 212 static int wcd934x_slim_probe(struct slim_device *sdev) 213 { 214 struct device *dev = &sdev->dev; 215 struct device_node *np = dev->of_node; 216 struct wcd934x_ddata *ddata; 217 struct gpio_desc *reset_gpio; 218 int ret; 219 220 ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); 221 if (!ddata) 222 return -ENOMEM; 223 224 ddata->irq = of_irq_get(np, 0); 225 if (ddata->irq < 0) 226 return dev_err_probe(ddata->dev, ddata->irq, 227 "Failed to get IRQ\n"); 228 229 ddata->extclk = devm_clk_get(dev, "extclk"); 230 if (IS_ERR(ddata->extclk)) { 231 dev_err(dev, "Failed to get extclk"); 232 return PTR_ERR(ddata->extclk); 233 } 234 235 ddata->supplies[0].supply = "vdd-buck"; 236 ddata->supplies[1].supply = "vdd-buck-sido"; 237 ddata->supplies[2].supply = "vdd-tx"; 238 ddata->supplies[3].supply = "vdd-rx"; 239 ddata->supplies[4].supply = "vdd-io"; 240 241 ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies); 242 if (ret) { 243 dev_err(dev, "Failed to get supplies: err = %d\n", ret); 244 return ret; 245 } 246 247 ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies); 248 if (ret) { 249 dev_err(dev, "Failed to enable supplies: err = %d\n", ret); 250 return ret; 251 } 252 253 /* 254 * For WCD934X, it takes about 600us for the Vout_A and 255 * Vout_D to be ready after BUCK_SIDO is powered up. 256 * SYS_RST_N shouldn't be pulled high during this time 257 */ 258 usleep_range(600, 650); 259 reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); 260 if (IS_ERR(reset_gpio)) { 261 return dev_err_probe(dev, PTR_ERR(reset_gpio), 262 "Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio)); 263 } 264 msleep(20); 265 gpiod_set_value(reset_gpio, 1); 266 msleep(20); 267 268 ddata->dev = dev; 269 dev_set_drvdata(dev, ddata); 270 271 return 0; 272 } 273 274 static void wcd934x_slim_remove(struct slim_device *sdev) 275 { 276 struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev); 277 278 regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies); 279 mfd_remove_devices(&sdev->dev); 280 } 281 282 static const struct slim_device_id wcd934x_slim_id[] = { 283 { SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340, 284 SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 }, 285 {} 286 }; 287 288 static struct slim_driver wcd934x_slim_driver = { 289 .driver = { 290 .name = "wcd934x-slim", 291 }, 292 .probe = wcd934x_slim_probe, 293 .remove = wcd934x_slim_remove, 294 .device_status = wcd934x_slim_status, 295 .id_table = wcd934x_slim_id, 296 }; 297 298 module_slim_driver(wcd934x_slim_driver); 299 MODULE_DESCRIPTION("WCD934X slim driver"); 300 MODULE_LICENSE("GPL v2"); 301 MODULE_ALIAS("slim:217:250:*"); 302 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>"); 303