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1/*
2 * max77693.c - mfd core driver for the MAX 77693
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * SangYoung Son <hello.son@samsung.com>
6 *
7 * This program is not provided / owned by Maxim Integrated Products.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * This driver is based on max8997.c
24 */
25
26#include <linux/module.h>
27#include <linux/slab.h>
28#include <linux/i2c.h>
29#include <linux/err.h>
30#include <linux/interrupt.h>
31#include <linux/of.h>
32#include <linux/pm_runtime.h>
33#include <linux/mutex.h>
34#include <linux/mfd/core.h>
35#include <linux/mfd/max77693.h>
36#include <linux/mfd/max77693-common.h>
37#include <linux/mfd/max77693-private.h>
38#include <linux/regulator/machine.h>
39#include <linux/regmap.h>
40
41#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
42#define I2C_ADDR_MUIC (0x4A >> 1)
43#define I2C_ADDR_HAPTIC (0x90 >> 1)
44
45static const struct mfd_cell max77693_devs[] = {
46 { .name = "max77693-pmic", },
47 {
48 .name = "max77693-charger",
49 .of_compatible = "maxim,max77693-charger",
50 },
51 {
52 .name = "max77693-muic",
53 .of_compatible = "maxim,max77693-muic",
54 },
55 {
56 .name = "max77693-haptic",
57 .of_compatible = "maxim,max77693-haptic",
58 },
59 {
60 .name = "max77693-led",
61 .of_compatible = "maxim,max77693-led",
62 },
63};
64
65static const struct regmap_config max77693_regmap_config = {
66 .reg_bits = 8,
67 .val_bits = 8,
68 .max_register = MAX77693_PMIC_REG_END,
69};
70
71static const struct regmap_irq max77693_led_irqs[] = {
72 { .mask = LED_IRQ_FLED2_OPEN, },
73 { .mask = LED_IRQ_FLED2_SHORT, },
74 { .mask = LED_IRQ_FLED1_OPEN, },
75 { .mask = LED_IRQ_FLED1_SHORT, },
76 { .mask = LED_IRQ_MAX_FLASH, },
77};
78
79static const struct regmap_irq_chip max77693_led_irq_chip = {
80 .name = "max77693-led",
81 .status_base = MAX77693_LED_REG_FLASH_INT,
82 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK,
83 .mask_invert = false,
84 .num_regs = 1,
85 .irqs = max77693_led_irqs,
86 .num_irqs = ARRAY_SIZE(max77693_led_irqs),
87};
88
89static const struct regmap_irq max77693_topsys_irqs[] = {
90 { .mask = TOPSYS_IRQ_T120C_INT, },
91 { .mask = TOPSYS_IRQ_T140C_INT, },
92 { .mask = TOPSYS_IRQ_LOWSYS_INT, },
93};
94
95static const struct regmap_irq_chip max77693_topsys_irq_chip = {
96 .name = "max77693-topsys",
97 .status_base = MAX77693_PMIC_REG_TOPSYS_INT,
98 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
99 .mask_invert = false,
100 .num_regs = 1,
101 .irqs = max77693_topsys_irqs,
102 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs),
103};
104
105static const struct regmap_irq max77693_charger_irqs[] = {
106 { .mask = CHG_IRQ_BYP_I, },
107 { .mask = CHG_IRQ_THM_I, },
108 { .mask = CHG_IRQ_BAT_I, },
109 { .mask = CHG_IRQ_CHG_I, },
110 { .mask = CHG_IRQ_CHGIN_I, },
111};
112
113static const struct regmap_irq_chip max77693_charger_irq_chip = {
114 .name = "max77693-charger",
115 .status_base = MAX77693_CHG_REG_CHG_INT,
116 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK,
117 .mask_invert = false,
118 .num_regs = 1,
119 .irqs = max77693_charger_irqs,
120 .num_irqs = ARRAY_SIZE(max77693_charger_irqs),
121};
122
123static const struct regmap_config max77693_regmap_muic_config = {
124 .reg_bits = 8,
125 .val_bits = 8,
126 .max_register = MAX77693_MUIC_REG_END,
127};
128
129static const struct regmap_irq max77693_muic_irqs[] = {
130 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, },
131 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, },
132 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, },
133 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, },
134
135 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, },
136 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, },
137 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, },
138 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, },
139 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, },
140 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, },
141
142 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, },
143 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, },
144 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, },
145 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, },
146 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, },
147 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, },
148};
149
150static const struct regmap_irq_chip max77693_muic_irq_chip = {
151 .name = "max77693-muic",
152 .status_base = MAX77693_MUIC_REG_INT1,
153 .mask_base = MAX77693_MUIC_REG_INTMASK1,
154 .mask_invert = true,
155 .num_regs = 3,
156 .irqs = max77693_muic_irqs,
157 .num_irqs = ARRAY_SIZE(max77693_muic_irqs),
158};
159
160static const struct regmap_config max77693_regmap_haptic_config = {
161 .reg_bits = 8,
162 .val_bits = 8,
163 .max_register = MAX77693_HAPTIC_REG_END,
164};
165
166static int max77693_i2c_probe(struct i2c_client *i2c,
167 const struct i2c_device_id *id)
168{
169 struct max77693_dev *max77693;
170 unsigned int reg_data;
171 int ret = 0;
172
173 max77693 = devm_kzalloc(&i2c->dev,
174 sizeof(struct max77693_dev), GFP_KERNEL);
175 if (max77693 == NULL)
176 return -ENOMEM;
177
178 i2c_set_clientdata(i2c, max77693);
179 max77693->dev = &i2c->dev;
180 max77693->i2c = i2c;
181 max77693->irq = i2c->irq;
182 max77693->type = id->driver_data;
183
184 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
185 if (IS_ERR(max77693->regmap)) {
186 ret = PTR_ERR(max77693->regmap);
187 dev_err(max77693->dev, "failed to allocate register map: %d\n",
188 ret);
189 return ret;
190 }
191
192 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
193 ®_data);
194 if (ret < 0) {
195 dev_err(max77693->dev, "device not found on this channel\n");
196 return ret;
197 } else
198 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
199
200 max77693->i2c_muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
201 if (!max77693->i2c_muic) {
202 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
203 return -ENODEV;
204 }
205 i2c_set_clientdata(max77693->i2c_muic, max77693);
206
207 max77693->i2c_haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
208 if (!max77693->i2c_haptic) {
209 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
210 ret = -ENODEV;
211 goto err_i2c_haptic;
212 }
213 i2c_set_clientdata(max77693->i2c_haptic, max77693);
214
215 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,
216 &max77693_regmap_haptic_config);
217 if (IS_ERR(max77693->regmap_haptic)) {
218 ret = PTR_ERR(max77693->regmap_haptic);
219 dev_err(max77693->dev,
220 "failed to initialize haptic register map: %d\n", ret);
221 goto err_regmap;
222 }
223
224 /*
225 * Initialize register map for MUIC device because use regmap-muic
226 * instance of MUIC device when irq of max77693 is initialized
227 * before call max77693-muic probe() function.
228 */
229 max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,
230 &max77693_regmap_muic_config);
231 if (IS_ERR(max77693->regmap_muic)) {
232 ret = PTR_ERR(max77693->regmap_muic);
233 dev_err(max77693->dev,
234 "failed to allocate register map: %d\n", ret);
235 goto err_regmap;
236 }
237
238 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
239 IRQF_ONESHOT | IRQF_SHARED |
240 IRQF_TRIGGER_FALLING, 0,
241 &max77693_led_irq_chip,
242 &max77693->irq_data_led);
243 if (ret) {
244 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
245 goto err_regmap;
246 }
247
248 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
249 IRQF_ONESHOT | IRQF_SHARED |
250 IRQF_TRIGGER_FALLING, 0,
251 &max77693_topsys_irq_chip,
252 &max77693->irq_data_topsys);
253 if (ret) {
254 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
255 goto err_irq_topsys;
256 }
257
258 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
259 IRQF_ONESHOT | IRQF_SHARED |
260 IRQF_TRIGGER_FALLING, 0,
261 &max77693_charger_irq_chip,
262 &max77693->irq_data_chg);
263 if (ret) {
264 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
265 goto err_irq_charger;
266 }
267
268 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
269 IRQF_ONESHOT | IRQF_SHARED |
270 IRQF_TRIGGER_FALLING, 0,
271 &max77693_muic_irq_chip,
272 &max77693->irq_data_muic);
273 if (ret) {
274 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
275 goto err_irq_muic;
276 }
277
278 /* Unmask interrupts from all blocks in interrupt source register */
279 ret = regmap_update_bits(max77693->regmap,
280 MAX77693_PMIC_REG_INTSRC_MASK,
281 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
282 if (ret < 0) {
283 dev_err(max77693->dev,
284 "Could not unmask interrupts in INTSRC: %d\n",
285 ret);
286 goto err_intsrc;
287 }
288
289 pm_runtime_set_active(max77693->dev);
290
291 ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
292 ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
293 if (ret < 0)
294 goto err_mfd;
295
296 return ret;
297
298err_mfd:
299 mfd_remove_devices(max77693->dev);
300err_intsrc:
301 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
302err_irq_muic:
303 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
304err_irq_charger:
305 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
306err_irq_topsys:
307 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
308err_regmap:
309 i2c_unregister_device(max77693->i2c_haptic);
310err_i2c_haptic:
311 i2c_unregister_device(max77693->i2c_muic);
312 return ret;
313}
314
315static int max77693_i2c_remove(struct i2c_client *i2c)
316{
317 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
318
319 mfd_remove_devices(max77693->dev);
320
321 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
322 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);
323 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
324 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
325
326 i2c_unregister_device(max77693->i2c_muic);
327 i2c_unregister_device(max77693->i2c_haptic);
328
329 return 0;
330}
331
332static const struct i2c_device_id max77693_i2c_id[] = {
333 { "max77693", TYPE_MAX77693 },
334 { }
335};
336MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
337
338static int max77693_suspend(struct device *dev)
339{
340 struct i2c_client *i2c = to_i2c_client(dev);
341 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
342
343 if (device_may_wakeup(dev)) {
344 enable_irq_wake(max77693->irq);
345 disable_irq(max77693->irq);
346 }
347
348 return 0;
349}
350
351static int max77693_resume(struct device *dev)
352{
353 struct i2c_client *i2c = to_i2c_client(dev);
354 struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
355
356 if (device_may_wakeup(dev)) {
357 disable_irq_wake(max77693->irq);
358 enable_irq(max77693->irq);
359 }
360
361 return 0;
362}
363
364static const struct dev_pm_ops max77693_pm = {
365 .suspend = max77693_suspend,
366 .resume = max77693_resume,
367};
368
369#ifdef CONFIG_OF
370static const struct of_device_id max77693_dt_match[] = {
371 { .compatible = "maxim,max77693" },
372 {},
373};
374MODULE_DEVICE_TABLE(of, max77693_dt_match);
375#endif
376
377static struct i2c_driver max77693_i2c_driver = {
378 .driver = {
379 .name = "max77693",
380 .pm = &max77693_pm,
381 .of_match_table = of_match_ptr(max77693_dt_match),
382 },
383 .probe = max77693_i2c_probe,
384 .remove = max77693_i2c_remove,
385 .id_table = max77693_i2c_id,
386};
387
388module_i2c_driver(max77693_i2c_driver);
389
390MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
391MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
392MODULE_LICENSE("GPL");