1/*
2 * max77693.c - mfd core driver for the MAX 77693
3 *
4 * Copyright (C) 2012 Samsung Electronics
5 * SangYoung Son <hello.son@smasung.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-private.h>
37#include <linux/regulator/machine.h>
38#include <linux/regmap.h>
39
40#define I2C_ADDR_PMIC	(0xCC >> 1)	/* Charger, Flash LED */
41#define I2C_ADDR_MUIC	(0x4A >> 1)
42#define I2C_ADDR_HAPTIC	(0x90 >> 1)
43
44static const struct mfd_cell max77693_devs[] = {
45	{ .name = "max77693-pmic", },
46	{
47		.name = "max77693-charger",
48		.of_compatible = "maxim,max77693-charger",
49	},
50	{ .name = "max77693-muic", },
51	{
52		.name = "max77693-haptic",
53		.of_compatible = "maxim,max77693-haptic",
54	},
55	{
56		.name = "max77693-led",
57		.of_compatible = "maxim,max77693-led",
58	},
59};
60
61static const struct regmap_config max77693_regmap_config = {
62	.reg_bits = 8,
63	.val_bits = 8,
64	.max_register = MAX77693_PMIC_REG_END,
65};
66
67static const struct regmap_irq max77693_led_irqs[] = {
68	{ .mask = LED_IRQ_FLED2_OPEN,  },
69	{ .mask = LED_IRQ_FLED2_SHORT, },
70	{ .mask = LED_IRQ_FLED1_OPEN,  },
71	{ .mask = LED_IRQ_FLED1_SHORT, },
72	{ .mask = LED_IRQ_MAX_FLASH,   },
73};
74
75static const struct regmap_irq_chip max77693_led_irq_chip = {
76	.name			= "max77693-led",
77	.status_base		= MAX77693_LED_REG_FLASH_INT,
78	.mask_base		= MAX77693_LED_REG_FLASH_INT_MASK,
79	.mask_invert		= false,
80	.num_regs		= 1,
81	.irqs			= max77693_led_irqs,
82	.num_irqs		= ARRAY_SIZE(max77693_led_irqs),
83};
84
85static const struct regmap_irq max77693_topsys_irqs[] = {
86	{ .mask = TOPSYS_IRQ_T120C_INT,  },
87	{ .mask = TOPSYS_IRQ_T140C_INT,  },
88	{ .mask = TOPSYS_IRQ_LOWSYS_INT, },
89};
90
91static const struct regmap_irq_chip max77693_topsys_irq_chip = {
92	.name			= "max77693-topsys",
93	.status_base		= MAX77693_PMIC_REG_TOPSYS_INT,
94	.mask_base		= MAX77693_PMIC_REG_TOPSYS_INT_MASK,
95	.mask_invert		= false,
96	.num_regs		= 1,
97	.irqs			= max77693_topsys_irqs,
98	.num_irqs		= ARRAY_SIZE(max77693_topsys_irqs),
99};
100
101static const struct regmap_irq max77693_charger_irqs[] = {
102	{ .mask = CHG_IRQ_BYP_I,   },
103	{ .mask = CHG_IRQ_THM_I,   },
104	{ .mask = CHG_IRQ_BAT_I,   },
105	{ .mask = CHG_IRQ_CHG_I,   },
106	{ .mask = CHG_IRQ_CHGIN_I, },
107};
108
109static const struct regmap_irq_chip max77693_charger_irq_chip = {
110	.name			= "max77693-charger",
111	.status_base		= MAX77693_CHG_REG_CHG_INT,
112	.mask_base		= MAX77693_CHG_REG_CHG_INT_MASK,
113	.mask_invert		= false,
114	.num_regs		= 1,
115	.irqs			= max77693_charger_irqs,
116	.num_irqs		= ARRAY_SIZE(max77693_charger_irqs),
117};
118
119static const struct regmap_config max77693_regmap_muic_config = {
120	.reg_bits = 8,
121	.val_bits = 8,
122	.max_register = MAX77693_MUIC_REG_END,
123};
124
125static const struct regmap_irq max77693_muic_irqs[] = {
126	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,		},
127	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,	},
128	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,	},
129	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,		},
130
131	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,	},
132	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,	},
133	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,	},
134	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,		},
135	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,	},
136	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,		},
137
138	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,		},
139	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,		},
140	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,		},
141	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,	},
142	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,	},
143	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,	},
144};
145
146static const struct regmap_irq_chip max77693_muic_irq_chip = {
147	.name			= "max77693-muic",
148	.status_base		= MAX77693_MUIC_REG_INT1,
149	.mask_base		= MAX77693_MUIC_REG_INTMASK1,
150	.mask_invert		= true,
151	.num_regs		= 3,
152	.irqs			= max77693_muic_irqs,
153	.num_irqs		= ARRAY_SIZE(max77693_muic_irqs),
154};
155
156static const struct regmap_config max77693_regmap_haptic_config = {
157	.reg_bits = 8,
158	.val_bits = 8,
159	.max_register = MAX77693_HAPTIC_REG_END,
160};
161
162static int max77693_i2c_probe(struct i2c_client *i2c,
163			      const struct i2c_device_id *id)
164{
165	struct max77693_dev *max77693;
166	unsigned int reg_data;
167	int ret = 0;
168
169	max77693 = devm_kzalloc(&i2c->dev,
170			sizeof(struct max77693_dev), GFP_KERNEL);
171	if (max77693 == NULL)
172		return -ENOMEM;
173
174	i2c_set_clientdata(i2c, max77693);
175	max77693->dev = &i2c->dev;
176	max77693->i2c = i2c;
177	max77693->irq = i2c->irq;
178	max77693->type = id->driver_data;
179
180	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
181	if (IS_ERR(max77693->regmap)) {
182		ret = PTR_ERR(max77693->regmap);
183		dev_err(max77693->dev, "failed to allocate register map: %d\n",
184				ret);
185		return ret;
186	}
187
188	ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
189				&reg_data);
190	if (ret < 0) {
191		dev_err(max77693->dev, "device not found on this channel\n");
192		return ret;
193	} else
194		dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
195
196	max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
197	if (!max77693->muic) {
198		dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
199		return -ENODEV;
200	}
201	i2c_set_clientdata(max77693->muic, max77693);
202
203	max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
204	if (!max77693->haptic) {
205		dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
206		ret = -ENODEV;
207		goto err_i2c_haptic;
208	}
209	i2c_set_clientdata(max77693->haptic, max77693);
210
211	max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic,
212					&max77693_regmap_haptic_config);
213	if (IS_ERR(max77693->regmap_haptic)) {
214		ret = PTR_ERR(max77693->regmap_haptic);
215		dev_err(max77693->dev,
216			"failed to initialize haptic register map: %d\n", ret);
217		goto err_regmap;
218	}
219
220	/*
221	 * Initialize register map for MUIC device because use regmap-muic
222	 * instance of MUIC device when irq of max77693 is initialized
223	 * before call max77693-muic probe() function.
224	 */
225	max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
226					 &max77693_regmap_muic_config);
227	if (IS_ERR(max77693->regmap_muic)) {
228		ret = PTR_ERR(max77693->regmap_muic);
229		dev_err(max77693->dev,
230			"failed to allocate register map: %d\n", ret);
231		goto err_regmap;
232	}
233
234	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
235				IRQF_ONESHOT | IRQF_SHARED |
236				IRQF_TRIGGER_FALLING, 0,
237				&max77693_led_irq_chip,
238				&max77693->irq_data_led);
239	if (ret) {
240		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
241		goto err_regmap;
242	}
243
244	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
245				IRQF_ONESHOT | IRQF_SHARED |
246				IRQF_TRIGGER_FALLING, 0,
247				&max77693_topsys_irq_chip,
248				&max77693->irq_data_topsys);
249	if (ret) {
250		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
251		goto err_irq_topsys;
252	}
253
254	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
255				IRQF_ONESHOT | IRQF_SHARED |
256				IRQF_TRIGGER_FALLING, 0,
257				&max77693_charger_irq_chip,
258				&max77693->irq_data_charger);
259	if (ret) {
260		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
261		goto err_irq_charger;
262	}
263
264	ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
265				IRQF_ONESHOT | IRQF_SHARED |
266				IRQF_TRIGGER_FALLING, 0,
267				&max77693_muic_irq_chip,
268				&max77693->irq_data_muic);
269	if (ret) {
270		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
271		goto err_irq_muic;
272	}
273
274	/* Unmask interrupts from all blocks in interrupt source register */
275	ret = regmap_update_bits(max77693->regmap,
276				MAX77693_PMIC_REG_INTSRC_MASK,
277				SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
278	if (ret < 0) {
279		dev_err(max77693->dev,
280			"Could not unmask interrupts in INTSRC: %d\n",
281			ret);
282		goto err_intsrc;
283	}
284
285	pm_runtime_set_active(max77693->dev);
286
287	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
288			      ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
289	if (ret < 0)
290		goto err_mfd;
291
292	return ret;
293
294err_mfd:
295	mfd_remove_devices(max77693->dev);
296err_intsrc:
297	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
298err_irq_muic:
299	regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
300err_irq_charger:
301	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
302err_irq_topsys:
303	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
304err_regmap:
305	i2c_unregister_device(max77693->haptic);
306err_i2c_haptic:
307	i2c_unregister_device(max77693->muic);
308	return ret;
309}
310
311static int max77693_i2c_remove(struct i2c_client *i2c)
312{
313	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
314
315	mfd_remove_devices(max77693->dev);
316
317	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
318	regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
319	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
320	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
321
322	i2c_unregister_device(max77693->muic);
323	i2c_unregister_device(max77693->haptic);
324
325	return 0;
326}
327
328static const struct i2c_device_id max77693_i2c_id[] = {
329	{ "max77693", TYPE_MAX77693 },
330	{ }
331};
332MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
333
334static int max77693_suspend(struct device *dev)
335{
336	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
337	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
338
339	if (device_may_wakeup(dev)) {
340		enable_irq_wake(max77693->irq);
341		disable_irq(max77693->irq);
342	}
343
344	return 0;
345}
346
347static int max77693_resume(struct device *dev)
348{
349	struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
350	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
351
352	if (device_may_wakeup(dev)) {
353		disable_irq_wake(max77693->irq);
354		enable_irq(max77693->irq);
355	}
356
357	return 0;
358}
359
360static const struct dev_pm_ops max77693_pm = {
361	.suspend = max77693_suspend,
362	.resume = max77693_resume,
363};
364
365#ifdef CONFIG_OF
366static const struct of_device_id max77693_dt_match[] = {
367	{ .compatible = "maxim,max77693" },
368	{},
369};
370#endif
371
372static struct i2c_driver max77693_i2c_driver = {
373	.driver = {
374		   .name = "max77693",
375		   .owner = THIS_MODULE,
376		   .pm = &max77693_pm,
377		   .of_match_table = of_match_ptr(max77693_dt_match),
378	},
379	.probe = max77693_i2c_probe,
380	.remove = max77693_i2c_remove,
381	.id_table = max77693_i2c_id,
382};
383
384static int __init max77693_i2c_init(void)
385{
386	return i2c_add_driver(&max77693_i2c_driver);
387}
388/* init early so consumer devices can complete system boot */
389subsys_initcall(max77693_i2c_init);
390
391static void __exit max77693_i2c_exit(void)
392{
393	i2c_del_driver(&max77693_i2c_driver);
394}
395module_exit(max77693_i2c_exit);
396
397MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
398MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
399MODULE_LICENSE("GPL");
400