1 // SPDX-License-Identifier: GPL-2.0 2 // Copyright (c) 2019, Linaro Limited 3 4 #include <linux/clk.h> 5 #include <linux/gpio.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_gpio.h> 13 #include <linux/of.h> 14 #include <linux/of_irq.h> 15 #include <linux/platform_device.h> 16 #include <linux/regmap.h> 17 #include <linux/regulator/consumer.h> 18 #include <linux/slimbus.h> 19 20 #define WCD934X_REGMAP_IRQ_REG(_irq, _off, _mask) \ 21 [_irq] = { \ 22 .reg_offset = (_off), \ 23 .mask = (_mask), \ 24 .type = { \ 25 .type_reg_offset = (_off), \ 26 .types_supported = IRQ_TYPE_EDGE_BOTH, \ 27 .type_reg_mask = (_mask), \ 28 .type_level_low_val = (_mask), \ 29 .type_level_high_val = (_mask), \ 30 .type_falling_val = 0, \ 31 .type_rising_val = 0, \ 32 }, \ 33 } 34 35 static const struct mfd_cell wcd934x_devices[] = { 36 { 37 .name = "wcd934x-codec", 38 }, { 39 .name = "wcd934x-gpio", 40 .of_compatible = "qcom,wcd9340-gpio", 41 }, { 42 .name = "wcd934x-soundwire", 43 .of_compatible = "qcom,soundwire-v1.3.0", 44 }, 45 }; 46 47 static const struct regmap_irq wcd934x_irqs[] = { 48 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SLIMBUS, 0, BIT(0)), 49 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPL_FAULT, 0, BIT(2)), 50 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_HPH_PA_OCPR_FAULT, 0, BIT(3)), 51 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_SW_DET, 1, BIT(0)), 52 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_DET, 1, BIT(1)), 53 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_PRESS_DET, 1, BIT(2)), 54 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_BUTTON_RELEASE_DET, 1, BIT(3)), 55 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_MBHC_ELECT_INS_REM_LEG_DET, 1, BIT(4)), 56 WCD934X_REGMAP_IRQ_REG(WCD934X_IRQ_SOUNDWIRE, 2, BIT(4)), 57 }; 58 59 static const struct regmap_irq_chip wcd934x_regmap_irq_chip = { 60 .name = "wcd934x_irq", 61 .status_base = WCD934X_INTR_PIN1_STATUS0, 62 .mask_base = WCD934X_INTR_PIN1_MASK0, 63 .ack_base = WCD934X_INTR_PIN1_CLEAR0, 64 .type_base = WCD934X_INTR_LEVEL0, 65 .num_type_reg = 4, 66 .type_in_mask = false, 67 .num_regs = 4, 68 .irqs = wcd934x_irqs, 69 .num_irqs = ARRAY_SIZE(wcd934x_irqs), 70 }; 71 72 static bool wcd934x_is_volatile_register(struct device *dev, unsigned int reg) 73 { 74 switch (reg) { 75 case WCD934X_INTR_PIN1_STATUS0...WCD934X_INTR_PIN2_CLEAR3: 76 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_0: 77 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_1: 78 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_2: 79 case WCD934X_SWR_AHB_BRIDGE_RD_DATA_3: 80 case WCD934X_SWR_AHB_BRIDGE_ACCESS_STATUS: 81 case WCD934X_ANA_MBHC_RESULT_3: 82 case WCD934X_ANA_MBHC_RESULT_2: 83 case WCD934X_ANA_MBHC_RESULT_1: 84 case WCD934X_ANA_MBHC_MECH: 85 case WCD934X_ANA_MBHC_ELECT: 86 case WCD934X_ANA_MBHC_ZDET: 87 case WCD934X_ANA_MICB2: 88 case WCD934X_ANA_RCO: 89 case WCD934X_ANA_BIAS: 90 return true; 91 default: 92 return false; 93 } 94 }; 95 96 static const struct regmap_range_cfg wcd934x_ranges[] = { 97 { .name = "WCD934X", 98 .range_min = 0x0, 99 .range_max = WCD934X_MAX_REGISTER, 100 .selector_reg = WCD934X_SEL_REGISTER, 101 .selector_mask = WCD934X_SEL_MASK, 102 .selector_shift = WCD934X_SEL_SHIFT, 103 .window_start = WCD934X_WINDOW_START, 104 .window_len = WCD934X_WINDOW_LENGTH, 105 }, 106 }; 107 108 static struct regmap_config wcd934x_regmap_config = { 109 .reg_bits = 16, 110 .val_bits = 8, 111 .cache_type = REGCACHE_RBTREE, 112 .max_register = 0xffff, 113 .can_multi_write = true, 114 .ranges = wcd934x_ranges, 115 .num_ranges = ARRAY_SIZE(wcd934x_ranges), 116 .volatile_reg = wcd934x_is_volatile_register, 117 }; 118 119 static int wcd934x_bring_up(struct wcd934x_ddata *ddata) 120 { 121 struct regmap *regmap = ddata->regmap; 122 u16 id_minor, id_major; 123 int ret; 124 125 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE0, 126 (u8 *)&id_minor, sizeof(u16)); 127 if (ret) 128 return ret; 129 130 ret = regmap_bulk_read(regmap, WCD934X_CHIP_TIER_CTRL_CHIP_ID_BYTE2, 131 (u8 *)&id_major, sizeof(u16)); 132 if (ret) 133 return ret; 134 135 dev_info(ddata->dev, "WCD934x chip id major 0x%x, minor 0x%x\n", 136 id_major, id_minor); 137 138 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x01); 139 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_A_STARTUP, 0x19); 140 regmap_write(regmap, WCD934X_SIDO_NEW_VOUT_D_STARTUP, 0x15); 141 /* Add 1msec delay for VOUT to settle */ 142 usleep_range(1000, 1100); 143 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x5); 144 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x7); 145 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x3); 146 regmap_write(regmap, WCD934X_CODEC_RPM_RST_CTL, 0x7); 147 regmap_write(regmap, WCD934X_CODEC_RPM_PWR_CDC_DIG_HM_CTL, 0x3); 148 149 return 0; 150 } 151 152 static int wcd934x_slim_status_up(struct slim_device *sdev) 153 { 154 struct device *dev = &sdev->dev; 155 struct wcd934x_ddata *ddata; 156 int ret; 157 158 ddata = dev_get_drvdata(dev); 159 160 ddata->regmap = regmap_init_slimbus(sdev, &wcd934x_regmap_config); 161 if (IS_ERR(ddata->regmap)) { 162 dev_err(dev, "Error allocating slim regmap\n"); 163 return PTR_ERR(ddata->regmap); 164 } 165 166 ret = wcd934x_bring_up(ddata); 167 if (ret) { 168 dev_err(dev, "Failed to bring up WCD934X: err = %d\n", ret); 169 return ret; 170 } 171 172 ret = devm_regmap_add_irq_chip(dev, ddata->regmap, ddata->irq, 173 IRQF_TRIGGER_HIGH, 0, 174 &wcd934x_regmap_irq_chip, 175 &ddata->irq_data); 176 if (ret) { 177 dev_err(dev, "Failed to add IRQ chip: err = %d\n", ret); 178 return ret; 179 } 180 181 ret = mfd_add_devices(dev, PLATFORM_DEVID_AUTO, wcd934x_devices, 182 ARRAY_SIZE(wcd934x_devices), NULL, 0, NULL); 183 if (ret) { 184 dev_err(dev, "Failed to add child devices: err = %d\n", 185 ret); 186 return ret; 187 } 188 189 return ret; 190 } 191 192 static int wcd934x_slim_status(struct slim_device *sdev, 193 enum slim_device_status status) 194 { 195 switch (status) { 196 case SLIM_DEVICE_STATUS_UP: 197 return wcd934x_slim_status_up(sdev); 198 case SLIM_DEVICE_STATUS_DOWN: 199 mfd_remove_devices(&sdev->dev); 200 break; 201 default: 202 return -EINVAL; 203 } 204 205 return 0; 206 } 207 208 static int wcd934x_slim_probe(struct slim_device *sdev) 209 { 210 struct device *dev = &sdev->dev; 211 struct device_node *np = dev->of_node; 212 struct wcd934x_ddata *ddata; 213 int reset_gpio, 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 reset_gpio = of_get_named_gpio(np, "reset-gpios", 0); 225 if (reset_gpio < 0) { 226 dev_err(dev, "Failed to get reset gpio: err = %d\n", 227 reset_gpio); 228 return reset_gpio; 229 } 230 231 ddata->extclk = devm_clk_get(dev, "extclk"); 232 if (IS_ERR(ddata->extclk)) { 233 dev_err(dev, "Failed to get extclk"); 234 return PTR_ERR(ddata->extclk); 235 } 236 237 ddata->supplies[0].supply = "vdd-buck"; 238 ddata->supplies[1].supply = "vdd-buck-sido"; 239 ddata->supplies[2].supply = "vdd-tx"; 240 ddata->supplies[3].supply = "vdd-rx"; 241 ddata->supplies[4].supply = "vdd-io"; 242 243 ret = regulator_bulk_get(dev, WCD934X_MAX_SUPPLY, ddata->supplies); 244 if (ret) { 245 dev_err(dev, "Failed to get supplies: err = %d\n", ret); 246 return ret; 247 } 248 249 ret = regulator_bulk_enable(WCD934X_MAX_SUPPLY, ddata->supplies); 250 if (ret) { 251 dev_err(dev, "Failed to enable supplies: err = %d\n", ret); 252 return ret; 253 } 254 255 /* 256 * For WCD934X, it takes about 600us for the Vout_A and 257 * Vout_D to be ready after BUCK_SIDO is powered up. 258 * SYS_RST_N shouldn't be pulled high during this time 259 */ 260 usleep_range(600, 650); 261 gpio_direction_output(reset_gpio, 0); 262 msleep(20); 263 gpio_set_value(reset_gpio, 1); 264 msleep(20); 265 266 ddata->dev = dev; 267 dev_set_drvdata(dev, ddata); 268 269 return 0; 270 } 271 272 static void wcd934x_slim_remove(struct slim_device *sdev) 273 { 274 struct wcd934x_ddata *ddata = dev_get_drvdata(&sdev->dev); 275 276 regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies); 277 mfd_remove_devices(&sdev->dev); 278 } 279 280 static const struct slim_device_id wcd934x_slim_id[] = { 281 { SLIM_MANF_ID_QCOM, SLIM_PROD_CODE_WCD9340, 282 SLIM_DEV_IDX_WCD9340, SLIM_DEV_INSTANCE_ID_WCD9340 }, 283 {} 284 }; 285 286 static struct slim_driver wcd934x_slim_driver = { 287 .driver = { 288 .name = "wcd934x-slim", 289 }, 290 .probe = wcd934x_slim_probe, 291 .remove = wcd934x_slim_remove, 292 .device_status = wcd934x_slim_status, 293 .id_table = wcd934x_slim_id, 294 }; 295 296 module_slim_driver(wcd934x_slim_driver); 297 MODULE_DESCRIPTION("WCD934X slim driver"); 298 MODULE_LICENSE("GPL v2"); 299 MODULE_ALIAS("slim:217:250:*"); 300 MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>"); 301