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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
35static 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
47static 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
59static 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
72static 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
96static 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
108static 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
119static 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
152static 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
192static 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
208static 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
272static 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
280static 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
286static 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
296module_slim_driver(wcd934x_slim_driver);
297MODULE_DESCRIPTION("WCD934X slim driver");
298MODULE_LICENSE("GPL v2");
299MODULE_ALIAS("slim:217:250:*");
300MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org>");