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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Spreadtrum Communications Inc.
4 */
5
6#include <linux/interrupt.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/mfd/core.h>
10#include <linux/mfd/sc27xx-pmic.h>
11#include <linux/of_device.h>
12#include <linux/of_platform.h>
13#include <linux/regmap.h>
14#include <linux/spi/spi.h>
15#include <uapi/linux/usb/charger.h>
16
17#define SPRD_PMIC_INT_MASK_STATUS 0x0
18#define SPRD_PMIC_INT_RAW_STATUS 0x4
19#define SPRD_PMIC_INT_EN 0x8
20
21#define SPRD_SC2731_IRQ_BASE 0x140
22#define SPRD_SC2731_IRQ_NUMS 16
23#define SPRD_SC2731_CHG_DET 0xedc
24
25/* PMIC charger detection definition */
26#define SPRD_PMIC_CHG_DET_DELAY_US 200000
27#define SPRD_PMIC_CHG_DET_TIMEOUT 2000000
28#define SPRD_PMIC_CHG_DET_DONE BIT(11)
29#define SPRD_PMIC_SDP_TYPE BIT(7)
30#define SPRD_PMIC_DCP_TYPE BIT(6)
31#define SPRD_PMIC_CDP_TYPE BIT(5)
32#define SPRD_PMIC_CHG_TYPE_MASK GENMASK(7, 5)
33
34struct sprd_pmic {
35 struct regmap *regmap;
36 struct device *dev;
37 struct regmap_irq *irqs;
38 struct regmap_irq_chip irq_chip;
39 struct regmap_irq_chip_data *irq_data;
40 const struct sprd_pmic_data *pdata;
41 int irq;
42};
43
44struct sprd_pmic_data {
45 u32 irq_base;
46 u32 num_irqs;
47 u32 charger_det;
48};
49
50/*
51 * Since different PMICs of SC27xx series can have different interrupt
52 * base address and irq number, we should save irq number and irq base
53 * in the device data structure.
54 */
55static const struct sprd_pmic_data sc2731_data = {
56 .irq_base = SPRD_SC2731_IRQ_BASE,
57 .num_irqs = SPRD_SC2731_IRQ_NUMS,
58 .charger_det = SPRD_SC2731_CHG_DET,
59};
60
61enum usb_charger_type sprd_pmic_detect_charger_type(struct device *dev)
62{
63 struct spi_device *spi = to_spi_device(dev);
64 struct sprd_pmic *ddata = spi_get_drvdata(spi);
65 const struct sprd_pmic_data *pdata = ddata->pdata;
66 enum usb_charger_type type;
67 u32 val;
68 int ret;
69
70 ret = regmap_read_poll_timeout(ddata->regmap, pdata->charger_det, val,
71 (val & SPRD_PMIC_CHG_DET_DONE),
72 SPRD_PMIC_CHG_DET_DELAY_US,
73 SPRD_PMIC_CHG_DET_TIMEOUT);
74 if (ret) {
75 dev_err(&spi->dev, "failed to detect charger type\n");
76 return UNKNOWN_TYPE;
77 }
78
79 switch (val & SPRD_PMIC_CHG_TYPE_MASK) {
80 case SPRD_PMIC_CDP_TYPE:
81 type = CDP_TYPE;
82 break;
83 case SPRD_PMIC_DCP_TYPE:
84 type = DCP_TYPE;
85 break;
86 case SPRD_PMIC_SDP_TYPE:
87 type = SDP_TYPE;
88 break;
89 default:
90 type = UNKNOWN_TYPE;
91 break;
92 }
93
94 return type;
95}
96EXPORT_SYMBOL_GPL(sprd_pmic_detect_charger_type);
97
98static int sprd_pmic_spi_write(void *context, const void *data, size_t count)
99{
100 struct device *dev = context;
101 struct spi_device *spi = to_spi_device(dev);
102
103 return spi_write(spi, data, count);
104}
105
106static int sprd_pmic_spi_read(void *context,
107 const void *reg, size_t reg_size,
108 void *val, size_t val_size)
109{
110 struct device *dev = context;
111 struct spi_device *spi = to_spi_device(dev);
112 u32 rx_buf[2] = { 0 };
113 int ret;
114
115 /* Now we only support one PMIC register to read every time. */
116 if (reg_size != sizeof(u32) || val_size != sizeof(u32))
117 return -EINVAL;
118
119 /* Copy address to read from into first element of SPI buffer. */
120 memcpy(rx_buf, reg, sizeof(u32));
121 ret = spi_read(spi, rx_buf, 1);
122 if (ret < 0)
123 return ret;
124
125 memcpy(val, rx_buf, val_size);
126 return 0;
127}
128
129static struct regmap_bus sprd_pmic_regmap = {
130 .write = sprd_pmic_spi_write,
131 .read = sprd_pmic_spi_read,
132 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
133 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
134};
135
136static const struct regmap_config sprd_pmic_config = {
137 .reg_bits = 32,
138 .val_bits = 32,
139 .reg_stride = 4,
140 .max_register = 0xffff,
141};
142
143static int sprd_pmic_probe(struct spi_device *spi)
144{
145 struct sprd_pmic *ddata;
146 const struct sprd_pmic_data *pdata;
147 int ret, i;
148
149 pdata = of_device_get_match_data(&spi->dev);
150 if (!pdata) {
151 dev_err(&spi->dev, "No matching driver data found\n");
152 return -EINVAL;
153 }
154
155 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
156 if (!ddata)
157 return -ENOMEM;
158
159 ddata->regmap = devm_regmap_init(&spi->dev, &sprd_pmic_regmap,
160 &spi->dev, &sprd_pmic_config);
161 if (IS_ERR(ddata->regmap)) {
162 ret = PTR_ERR(ddata->regmap);
163 dev_err(&spi->dev, "Failed to allocate register map %d\n", ret);
164 return ret;
165 }
166
167 spi_set_drvdata(spi, ddata);
168 ddata->dev = &spi->dev;
169 ddata->irq = spi->irq;
170 ddata->pdata = pdata;
171
172 ddata->irq_chip.name = dev_name(&spi->dev);
173 ddata->irq_chip.status_base =
174 pdata->irq_base + SPRD_PMIC_INT_MASK_STATUS;
175 ddata->irq_chip.mask_base = pdata->irq_base + SPRD_PMIC_INT_EN;
176 ddata->irq_chip.ack_base = 0;
177 ddata->irq_chip.num_regs = 1;
178 ddata->irq_chip.num_irqs = pdata->num_irqs;
179 ddata->irq_chip.mask_invert = true;
180
181 ddata->irqs = devm_kcalloc(&spi->dev,
182 pdata->num_irqs, sizeof(struct regmap_irq),
183 GFP_KERNEL);
184 if (!ddata->irqs)
185 return -ENOMEM;
186
187 ddata->irq_chip.irqs = ddata->irqs;
188 for (i = 0; i < pdata->num_irqs; i++)
189 ddata->irqs[i].mask = BIT(i);
190
191 ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
192 IRQF_ONESHOT | IRQF_NO_SUSPEND, 0,
193 &ddata->irq_chip, &ddata->irq_data);
194 if (ret) {
195 dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret);
196 return ret;
197 }
198
199 ret = devm_of_platform_populate(&spi->dev);
200 if (ret) {
201 dev_err(&spi->dev, "Failed to populate sub-devices %d\n", ret);
202 return ret;
203 }
204
205 return 0;
206}
207
208static const struct of_device_id sprd_pmic_match[] = {
209 { .compatible = "sprd,sc2731", .data = &sc2731_data },
210 {},
211};
212MODULE_DEVICE_TABLE(of, sprd_pmic_match);
213
214static struct spi_driver sprd_pmic_driver = {
215 .driver = {
216 .name = "sc27xx-pmic",
217 .of_match_table = sprd_pmic_match,
218 },
219 .probe = sprd_pmic_probe,
220};
221
222static int __init sprd_pmic_init(void)
223{
224 return spi_register_driver(&sprd_pmic_driver);
225}
226subsys_initcall(sprd_pmic_init);
227
228static void __exit sprd_pmic_exit(void)
229{
230 spi_unregister_driver(&sprd_pmic_driver);
231}
232module_exit(sprd_pmic_exit);
233
234MODULE_LICENSE("GPL v2");
235MODULE_DESCRIPTION("Spreadtrum SC27xx PMICs driver");
236MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2017 Spreadtrum Communications Inc.
4 */
5
6#include <linux/interrupt.h>
7#include <linux/kernel.h>
8#include <linux/module.h>
9#include <linux/mfd/core.h>
10#include <linux/mfd/sc27xx-pmic.h>
11#include <linux/of_device.h>
12#include <linux/of_platform.h>
13#include <linux/regmap.h>
14#include <linux/spi/spi.h>
15#include <uapi/linux/usb/charger.h>
16
17#define SPRD_PMIC_INT_MASK_STATUS 0x0
18#define SPRD_PMIC_INT_RAW_STATUS 0x4
19#define SPRD_PMIC_INT_EN 0x8
20
21#define SPRD_SC2730_IRQ_BASE 0x80
22#define SPRD_SC2730_IRQ_NUMS 10
23#define SPRD_SC2730_CHG_DET 0x1b9c
24#define SPRD_SC2731_IRQ_BASE 0x140
25#define SPRD_SC2731_IRQ_NUMS 16
26#define SPRD_SC2731_CHG_DET 0xedc
27
28/* PMIC charger detection definition */
29#define SPRD_PMIC_CHG_DET_DELAY_US 200000
30#define SPRD_PMIC_CHG_DET_TIMEOUT 2000000
31#define SPRD_PMIC_CHG_DET_DONE BIT(11)
32#define SPRD_PMIC_SDP_TYPE BIT(7)
33#define SPRD_PMIC_DCP_TYPE BIT(6)
34#define SPRD_PMIC_CDP_TYPE BIT(5)
35#define SPRD_PMIC_CHG_TYPE_MASK GENMASK(7, 5)
36
37struct sprd_pmic {
38 struct regmap *regmap;
39 struct device *dev;
40 struct regmap_irq *irqs;
41 struct regmap_irq_chip irq_chip;
42 struct regmap_irq_chip_data *irq_data;
43 const struct sprd_pmic_data *pdata;
44 int irq;
45};
46
47struct sprd_pmic_data {
48 u32 irq_base;
49 u32 num_irqs;
50 u32 charger_det;
51};
52
53/*
54 * Since different PMICs of SC27xx series can have different interrupt
55 * base address and irq number, we should save irq number and irq base
56 * in the device data structure.
57 */
58static const struct sprd_pmic_data sc2730_data = {
59 .irq_base = SPRD_SC2730_IRQ_BASE,
60 .num_irqs = SPRD_SC2730_IRQ_NUMS,
61 .charger_det = SPRD_SC2730_CHG_DET,
62};
63
64static const struct sprd_pmic_data sc2731_data = {
65 .irq_base = SPRD_SC2731_IRQ_BASE,
66 .num_irqs = SPRD_SC2731_IRQ_NUMS,
67 .charger_det = SPRD_SC2731_CHG_DET,
68};
69
70enum usb_charger_type sprd_pmic_detect_charger_type(struct device *dev)
71{
72 struct spi_device *spi = to_spi_device(dev);
73 struct sprd_pmic *ddata = spi_get_drvdata(spi);
74 const struct sprd_pmic_data *pdata = ddata->pdata;
75 enum usb_charger_type type;
76 u32 val;
77 int ret;
78
79 ret = regmap_read_poll_timeout(ddata->regmap, pdata->charger_det, val,
80 (val & SPRD_PMIC_CHG_DET_DONE),
81 SPRD_PMIC_CHG_DET_DELAY_US,
82 SPRD_PMIC_CHG_DET_TIMEOUT);
83 if (ret) {
84 dev_err(&spi->dev, "failed to detect charger type\n");
85 return UNKNOWN_TYPE;
86 }
87
88 switch (val & SPRD_PMIC_CHG_TYPE_MASK) {
89 case SPRD_PMIC_CDP_TYPE:
90 type = CDP_TYPE;
91 break;
92 case SPRD_PMIC_DCP_TYPE:
93 type = DCP_TYPE;
94 break;
95 case SPRD_PMIC_SDP_TYPE:
96 type = SDP_TYPE;
97 break;
98 default:
99 type = UNKNOWN_TYPE;
100 break;
101 }
102
103 return type;
104}
105EXPORT_SYMBOL_GPL(sprd_pmic_detect_charger_type);
106
107static int sprd_pmic_spi_write(void *context, const void *data, size_t count)
108{
109 struct device *dev = context;
110 struct spi_device *spi = to_spi_device(dev);
111
112 return spi_write(spi, data, count);
113}
114
115static int sprd_pmic_spi_read(void *context,
116 const void *reg, size_t reg_size,
117 void *val, size_t val_size)
118{
119 struct device *dev = context;
120 struct spi_device *spi = to_spi_device(dev);
121 u32 rx_buf[2] = { 0 };
122 int ret;
123
124 /* Now we only support one PMIC register to read every time. */
125 if (reg_size != sizeof(u32) || val_size != sizeof(u32))
126 return -EINVAL;
127
128 /* Copy address to read from into first element of SPI buffer. */
129 memcpy(rx_buf, reg, sizeof(u32));
130 ret = spi_read(spi, rx_buf, 1);
131 if (ret < 0)
132 return ret;
133
134 memcpy(val, rx_buf, val_size);
135 return 0;
136}
137
138static struct regmap_bus sprd_pmic_regmap = {
139 .write = sprd_pmic_spi_write,
140 .read = sprd_pmic_spi_read,
141 .reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
142 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
143};
144
145static const struct regmap_config sprd_pmic_config = {
146 .reg_bits = 32,
147 .val_bits = 32,
148 .reg_stride = 4,
149 .max_register = 0xffff,
150};
151
152static int sprd_pmic_probe(struct spi_device *spi)
153{
154 struct sprd_pmic *ddata;
155 const struct sprd_pmic_data *pdata;
156 int ret, i;
157
158 pdata = of_device_get_match_data(&spi->dev);
159 if (!pdata) {
160 dev_err(&spi->dev, "No matching driver data found\n");
161 return -EINVAL;
162 }
163
164 ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
165 if (!ddata)
166 return -ENOMEM;
167
168 ddata->regmap = devm_regmap_init(&spi->dev, &sprd_pmic_regmap,
169 &spi->dev, &sprd_pmic_config);
170 if (IS_ERR(ddata->regmap)) {
171 ret = PTR_ERR(ddata->regmap);
172 dev_err(&spi->dev, "Failed to allocate register map %d\n", ret);
173 return ret;
174 }
175
176 spi_set_drvdata(spi, ddata);
177 ddata->dev = &spi->dev;
178 ddata->irq = spi->irq;
179 ddata->pdata = pdata;
180
181 ddata->irq_chip.name = dev_name(&spi->dev);
182 ddata->irq_chip.status_base =
183 pdata->irq_base + SPRD_PMIC_INT_MASK_STATUS;
184 ddata->irq_chip.unmask_base = pdata->irq_base + SPRD_PMIC_INT_EN;
185 ddata->irq_chip.ack_base = 0;
186 ddata->irq_chip.num_regs = 1;
187 ddata->irq_chip.num_irqs = pdata->num_irqs;
188
189 ddata->irqs = devm_kcalloc(&spi->dev,
190 pdata->num_irqs, sizeof(struct regmap_irq),
191 GFP_KERNEL);
192 if (!ddata->irqs)
193 return -ENOMEM;
194
195 ddata->irq_chip.irqs = ddata->irqs;
196 for (i = 0; i < pdata->num_irqs; i++)
197 ddata->irqs[i].mask = BIT(i);
198
199 ret = devm_regmap_add_irq_chip(&spi->dev, ddata->regmap, ddata->irq,
200 IRQF_ONESHOT, 0,
201 &ddata->irq_chip, &ddata->irq_data);
202 if (ret) {
203 dev_err(&spi->dev, "Failed to add PMIC irq chip %d\n", ret);
204 return ret;
205 }
206
207 ret = devm_of_platform_populate(&spi->dev);
208 if (ret) {
209 dev_err(&spi->dev, "Failed to populate sub-devices %d\n", ret);
210 return ret;
211 }
212
213 device_init_wakeup(&spi->dev, true);
214 return 0;
215}
216
217static int sprd_pmic_suspend(struct device *dev)
218{
219 struct sprd_pmic *ddata = dev_get_drvdata(dev);
220
221 if (device_may_wakeup(dev))
222 enable_irq_wake(ddata->irq);
223
224 return 0;
225}
226
227static int sprd_pmic_resume(struct device *dev)
228{
229 struct sprd_pmic *ddata = dev_get_drvdata(dev);
230
231 if (device_may_wakeup(dev))
232 disable_irq_wake(ddata->irq);
233
234 return 0;
235}
236
237static DEFINE_SIMPLE_DEV_PM_OPS(sprd_pmic_pm_ops,
238 sprd_pmic_suspend, sprd_pmic_resume);
239
240static const struct of_device_id sprd_pmic_match[] = {
241 { .compatible = "sprd,sc2730", .data = &sc2730_data },
242 { .compatible = "sprd,sc2731", .data = &sc2731_data },
243 {},
244};
245MODULE_DEVICE_TABLE(of, sprd_pmic_match);
246
247static const struct spi_device_id sprd_pmic_spi_ids[] = {
248 { .name = "sc2730", .driver_data = (unsigned long)&sc2730_data },
249 { .name = "sc2731", .driver_data = (unsigned long)&sc2731_data },
250 {},
251};
252MODULE_DEVICE_TABLE(spi, sprd_pmic_spi_ids);
253
254static struct spi_driver sprd_pmic_driver = {
255 .driver = {
256 .name = "sc27xx-pmic",
257 .of_match_table = sprd_pmic_match,
258 .pm = pm_sleep_ptr(&sprd_pmic_pm_ops),
259 },
260 .probe = sprd_pmic_probe,
261 .id_table = sprd_pmic_spi_ids,
262};
263
264static int __init sprd_pmic_init(void)
265{
266 return spi_register_driver(&sprd_pmic_driver);
267}
268subsys_initcall(sprd_pmic_init);
269
270static void __exit sprd_pmic_exit(void)
271{
272 spi_unregister_driver(&sprd_pmic_driver);
273}
274module_exit(sprd_pmic_exit);
275
276MODULE_LICENSE("GPL v2");
277MODULE_DESCRIPTION("Spreadtrum SC27xx PMICs driver");
278MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");