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	{
58	 /* Headset microphone insertion or removal */
59	 .name = "micin",
60	 .start = PM805_IRQ_MIC_DET,
61	 .end = PM805_IRQ_MIC_DET,
62	 .flags = IORESOURCE_IRQ,
63	 },
64	{
65	 /* Audio short HP1 */
66	 .name = "audio-short1",
67	 .start = PM805_IRQ_HP1_SHRT,
68	 .end = PM805_IRQ_HP1_SHRT,
69	 .flags = IORESOURCE_IRQ,
70	 },
71	{
72	 /* Audio short HP2 */
73	 .name = "audio-short2",
74	 .start = PM805_IRQ_HP2_SHRT,
75	 .end = PM805_IRQ_HP2_SHRT,
76	 .flags = IORESOURCE_IRQ,
77	 },
78};
79
80static const struct mfd_cell codec_devs[] = {
81	{
82	 .name = "88pm80x-codec",
83	 .num_resources = ARRAY_SIZE(codec_resources),
84	 .resources = &codec_resources[0],
85	 .id = -1,
86	 },
87};
88
89static struct regmap_irq pm805_irqs[] = {
90	/* INT0 */
91	[PM805_IRQ_LDO_OFF] = {
92		.mask = PM805_INT1_HP1_SHRT,
93	},
94	[PM805_IRQ_SRC_DPLL_LOCK] = {
95		.mask = PM805_INT1_HP2_SHRT,
96	},
97	[PM805_IRQ_CLIP_FAULT] = {
98		.mask = PM805_INT1_MIC_CONFLICT,
99	},
100	[PM805_IRQ_MIC_CONFLICT] = {
101		.mask = PM805_INT1_CLIP_FAULT,
102	},
103	[PM805_IRQ_HP2_SHRT] = {
104		.mask = PM805_INT1_LDO_OFF,
105	},
106	[PM805_IRQ_HP1_SHRT] = {
107		.mask = PM805_INT1_SRC_DPLL_LOCK,
108	},
109	/* INT1 */
110	[PM805_IRQ_FINE_PLL_FAULT] = {
111		.reg_offset = 1,
112		.mask = PM805_INT2_MIC_DET,
113	},
114	[PM805_IRQ_RAW_PLL_FAULT] = {
115		.reg_offset = 1,
116		.mask = PM805_INT2_SHRT_BTN_DET,
117	},
118	[PM805_IRQ_VOLP_BTN_DET] = {
119		.reg_offset = 1,
120		.mask = PM805_INT2_VOLM_BTN_DET,
121	},
122	[PM805_IRQ_VOLM_BTN_DET] = {
123		.reg_offset = 1,
124		.mask = PM805_INT2_VOLP_BTN_DET,
125	},
126	[PM805_IRQ_SHRT_BTN_DET] = {
127		.reg_offset = 1,
128		.mask = PM805_INT2_RAW_PLL_FAULT,
129	},
130	[PM805_IRQ_MIC_DET] = {
131		.reg_offset = 1,
132		.mask = PM805_INT2_FINE_PLL_FAULT,
133	},
134};
135
136static int device_irq_init_805(struct pm80x_chip *chip)
137{
138	struct regmap *map = chip->regmap;
139	unsigned long flags = IRQF_ONESHOT;
140	int data, mask, ret = -EINVAL;
141
142	if (!map || !chip->irq) {
143		dev_err(chip->dev, "incorrect parameters\n");
144		return -EINVAL;
145	}
146
147	/*
148	 * irq_mode defines the way of clearing interrupt. it's read-clear by
149	 * default.
150	 */
151	mask =
152	    PM805_STATUS0_INT_CLEAR | PM805_STATUS0_INV_INT |
153	    PM800_STATUS0_INT_MASK;
154
155	data = PM805_STATUS0_INT_CLEAR;
156	ret = regmap_update_bits(map, PM805_INT_STATUS0, mask, data);
157	/*
158	 * PM805_INT_STATUS is under 32K clock domain, so need to
159	 * add proper delay before the next I2C register access.
160	 */
161	usleep_range(1000, 3000);
162
163	if (ret < 0)
164		goto out;
165
166	ret =
167	    regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,
168				chip->regmap_irq_chip, &chip->irq_data);
169
170out:
171	return ret;
172}
173
174static void device_irq_exit_805(struct pm80x_chip *chip)
175{
176	regmap_del_irq_chip(chip->irq, chip->irq_data);
177}
178
179static struct regmap_irq_chip pm805_irq_chip = {
180	.name = "88pm805",
181	.irqs = pm805_irqs,
182	.num_irqs = ARRAY_SIZE(pm805_irqs),
183
184	.num_regs = 2,
185	.status_base = PM805_INT_STATUS1,
186	.mask_base = PM805_INT_MASK1,
187	.ack_base = PM805_INT_STATUS1,
188};
189
190static int device_805_init(struct pm80x_chip *chip)
191{
192	int ret = 0;
193	struct regmap *map = chip->regmap;
194
195	if (!map) {
196		dev_err(chip->dev, "regmap is invalid\n");
197		return -EINVAL;
198	}
199
200	chip->regmap_irq_chip = &pm805_irq_chip;
201
202	ret = device_irq_init_805(chip);
203	if (ret < 0) {
204		dev_err(chip->dev, "Failed to init pm805 irq!\n");
205		goto out_irq_init;
206	}
207
208	ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
209			      ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
210			      NULL);
211	if (ret < 0) {
212		dev_err(chip->dev, "Failed to add codec subdev\n");
213		goto out_codec;
214	} else
215		dev_info(chip->dev, "[%s]:Added mfd codec_devs\n", __func__);
216
217	return 0;
218
219out_codec:
220	device_irq_exit_805(chip);
221out_irq_init:
222	return ret;
223}
224
225static int pm805_probe(struct i2c_client *client,
226				 const struct i2c_device_id *id)
227{
228	int ret = 0;
229	struct pm80x_chip *chip;
230	struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
231
232	ret = pm80x_init(client);
233	if (ret) {
234		dev_err(&client->dev, "pm805_init fail!\n");
235		goto out_init;
236	}
237
238	chip = i2c_get_clientdata(client);
239
240	ret = device_805_init(chip);
241	if (ret) {
242		dev_err(chip->dev, "Failed to initialize 88pm805 devices\n");
243		goto err_805_init;
244	}
245
246	if (pdata && pdata->plat_config)
247		pdata->plat_config(chip, pdata);
248
249err_805_init:
250	pm80x_deinit();
251out_init:
252	return ret;
253}
254
255static int pm805_remove(struct i2c_client *client)
256{
257	struct pm80x_chip *chip = i2c_get_clientdata(client);
258
259	mfd_remove_devices(chip->dev);
260	device_irq_exit_805(chip);
261
262	pm80x_deinit();
263
264	return 0;
265}
266
267static struct i2c_driver pm805_driver = {
268	.driver = {
269		.name = "88PM805",
270		.pm = &pm80x_pm_ops,
271		},
272	.probe = pm805_probe,
273	.remove = pm805_remove,
274	.id_table = pm80x_id_table,
275};
276
277static int __init pm805_i2c_init(void)
278{
279	return i2c_add_driver(&pm805_driver);
280}
281subsys_initcall(pm805_i2c_init);
282
283static void __exit pm805_i2c_exit(void)
284{
285	i2c_del_driver(&pm805_driver);
286}
287module_exit(pm805_i2c_exit);
288
289MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
290MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
291MODULE_LICENSE("GPL");
292