1/*
2 * Base driver for Marvell 88PM805
3 *
4 * Copyright (C) 2012 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
6 * Joseph(Yossi) Hanin <yhanin@marvell.com>
7 * Qiao Zhou <zhouqiao@marvell.com>
8 *
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file "COPYING" in the main directory of this
11 * archive for more details.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
21 */
22
23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/i2c.h>
26#include <linux/irq.h>
27#include <linux/mfd/core.h>
28#include <linux/mfd/88pm80x.h>
29#include <linux/slab.h>
30#include <linux/delay.h>
31
32static const struct i2c_device_id pm80x_id_table[] = {
33	{"88PM805", 0},
34	{} /* NULL terminated */
35};
36MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
37
38/* Interrupt Number in 88PM805 */
39enum {
40	PM805_IRQ_LDO_OFF,	/*0 */
41	PM805_IRQ_SRC_DPLL_LOCK,	/*1 */
42	PM805_IRQ_CLIP_FAULT,
43	PM805_IRQ_MIC_CONFLICT,
44	PM805_IRQ_HP2_SHRT,
45	PM805_IRQ_HP1_SHRT,	/*5 */
46	PM805_IRQ_FINE_PLL_FAULT,
47	PM805_IRQ_RAW_PLL_FAULT,
48	PM805_IRQ_VOLP_BTN_DET,
49	PM805_IRQ_VOLM_BTN_DET,
50	PM805_IRQ_SHRT_BTN_DET,	/*10 */
51	PM805_IRQ_MIC_DET,	/*11 */
52
53	PM805_MAX_IRQ,
54};
55
56static struct resource codec_resources[] = {
57	/* Headset microphone insertion or removal */
58	DEFINE_RES_IRQ_NAMED(PM805_IRQ_MIC_DET, "micin"),
59
60	/* Audio short HP1 */
61	DEFINE_RES_IRQ_NAMED(PM805_IRQ_HP1_SHRT, "audio-short1"),
62
63	/* Audio short HP2 */
64	DEFINE_RES_IRQ_NAMED(PM805_IRQ_HP2_SHRT, "audio-short2"),
65};
66
67static const struct mfd_cell codec_devs[] = {
68	{
69	 .name = "88pm80x-codec",
70	 .num_resources = ARRAY_SIZE(codec_resources),
71	 .resources = &codec_resources[0],
72	 .id = -1,
73	 },
74};
75
76static struct regmap_irq pm805_irqs[] = {
77	/* INT0 */
78	[PM805_IRQ_LDO_OFF] = {
79		.mask = PM805_INT1_HP1_SHRT,
80	},
81	[PM805_IRQ_SRC_DPLL_LOCK] = {
82		.mask = PM805_INT1_HP2_SHRT,
83	},
84	[PM805_IRQ_CLIP_FAULT] = {
85		.mask = PM805_INT1_MIC_CONFLICT,
86	},
87	[PM805_IRQ_MIC_CONFLICT] = {
88		.mask = PM805_INT1_CLIP_FAULT,
89	},
90	[PM805_IRQ_HP2_SHRT] = {
91		.mask = PM805_INT1_LDO_OFF,
92	},
93	[PM805_IRQ_HP1_SHRT] = {
94		.mask = PM805_INT1_SRC_DPLL_LOCK,
95	},
96	/* INT1 */
97	[PM805_IRQ_FINE_PLL_FAULT] = {
98		.reg_offset = 1,
99		.mask = PM805_INT2_MIC_DET,
100	},
101	[PM805_IRQ_RAW_PLL_FAULT] = {
102		.reg_offset = 1,
103		.mask = PM805_INT2_SHRT_BTN_DET,
104	},
105	[PM805_IRQ_VOLP_BTN_DET] = {
106		.reg_offset = 1,
107		.mask = PM805_INT2_VOLM_BTN_DET,
108	},
109	[PM805_IRQ_VOLM_BTN_DET] = {
110		.reg_offset = 1,
111		.mask = PM805_INT2_VOLP_BTN_DET,
112	},
113	[PM805_IRQ_SHRT_BTN_DET] = {
114		.reg_offset = 1,
115		.mask = PM805_INT2_RAW_PLL_FAULT,
116	},
117	[PM805_IRQ_MIC_DET] = {
118		.reg_offset = 1,
119		.mask = PM805_INT2_FINE_PLL_FAULT,
120	},
121};
122
123static int device_irq_init_805(struct pm80x_chip *chip)
124{
125	struct regmap *map = chip->regmap;
126	unsigned long flags = IRQF_ONESHOT;
127	int data, mask, ret = -EINVAL;
128
129	if (!map || !chip->irq) {
130		dev_err(chip->dev, "incorrect parameters\n");
131		return -EINVAL;
132	}
133
134	/*
135	 * irq_mode defines the way of clearing interrupt. it's read-clear by
136	 * default.
137	 */
138	mask =
139	    PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
140	    PM800_STATUS0_INT_MASK;
141
142	data = PM805_STATUS0_INT_CLEAR;
143	ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
144	/*
145	 * PM805_INT_STATUS is under 32K clock domain, so need to
146	 * add proper delay before the next I2C register access.
147	 */
148	usleep_range(1000, 3000);
149
150	if (ret < 0)
151		goto out;
152
153	ret =
154	    regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
155				chip->regmap_irq_chip, &chip->irq_data);
156
157out:
158	return ret;
159}
160
161static void device_irq_exit_805(struct pm80x_chip *chip)
162{
163	regmap_del_irq_chip(chip->irq, chip->irq_data);
164}
165
166static struct regmap_irq_chip pm805_irq_chip = {
167	.name = "88pm805",
168	.irqs = pm805_irqs,
169	.num_irqs = ARRAY_SIZE(pm805_irqs),
170
171	.num_regs = 2,
172	.status_base = PM805_INT_STATUS1,
173	.mask_base = PM805_INT_MASK1,
174	.ack_base = PM805_INT_STATUS1,
175};
176
177static int device_805_init(struct pm80x_chip *chip)
178{
179	int ret = 0;
180	struct regmap *map = chip->regmap;
181
182	if (!map) {
183		dev_err(chip->dev, "regmap is invalid\n");
184		return -EINVAL;
185	}
186
187	chip->regmap_irq_chip = &pm805_irq_chip;
188
189	ret = device_irq_init_805(chip);
190	if (ret < 0) {
191		dev_err(chip->dev, "Failed to init pm805 irq!\n");
192		goto out_irq_init;
193	}
194
195	ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
196			      ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
197			      NULL);
198	if (ret < 0) {
199		dev_err(chip->dev, "Failed to add codec subdev\n");
200		goto out_codec;
201	} else
202		dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
203
204	return 0;
205
206out_codec:
207	device_irq_exit_805(chip);
208out_irq_init:
209	return ret;
210}
211
212static int pm805_probe(struct i2c_client *client)
213{
214	int ret = 0;
215	struct pm80x_chip *chip;
216	struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
217
218	ret = pm80x_init(client);
219	if (ret) {
220		dev_err(&client->dev, "pm805_init fail!\n");
221		goto out_init;
222	}
223
224	chip = i2c_get_clientdata(client);
225
226	ret = device_805_init(chip);
227	if (ret) {
228		dev_err(chip->dev, "Failed to initialize 88pm805 devices\n");
229		goto err_805_init;
230	}
231
232	if (pdata && pdata->plat_config)
233		pdata->plat_config(chip, pdata);
234
235err_805_init:
236	pm80x_deinit();
237out_init:
238	return ret;
239}
240
241static void pm805_remove(struct i2c_client *client)
242{
243	struct pm80x_chip *chip = i2c_get_clientdata(client);
244
245	mfd_remove_devices(chip->dev);
246	device_irq_exit_805(chip);
247
248	pm80x_deinit();
249}
250
251static struct i2c_driver pm805_driver = {
252	.driver = {
253		.name = "88PM805",
254		.pm = pm_sleep_ptr(&pm80x_pm_ops),
255		},
256	.probe = pm805_probe,
257	.remove = pm805_remove,
258	.id_table = pm80x_id_table,
259};
260
261static int __init pm805_i2c_init(void)
262{
263	return i2c_add_driver(&pm805_driver);
264}
265subsys_initcall(pm805_i2c_init);
266
267static void __exit pm805_i2c_exit(void)
268{
269	i2c_del_driver(&pm805_driver);
270}
271module_exit(pm805_i2c_exit);
272
273MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
274MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
275MODULE_LICENSE("GPL");
276