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
32 static const struct i2c_device_id pm80x_id_table[] = {
33 {"88PM805", 0},
34 {} /* NULL terminated */
35 };
36 MODULE_DEVICE_TABLE(i2c, pm80x_id_table);
37
38 /* Interrupt Number in 88PM805 */
39 enum {
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
56 static 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
80 static 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
89 static 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
device_irq_init_805(struct pm80x_chip * chip)136 static 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
170 out:
171 return ret;
172 }
173
device_irq_exit_805(struct pm80x_chip * chip)174 static void device_irq_exit_805(struct pm80x_chip *chip)
175 {
176 regmap_del_irq_chip(chip->irq, chip->irq_data);
177 }
178
179 static 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
device_805_init(struct pm80x_chip * chip)190 static 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
219 out_codec:
220 device_irq_exit_805(chip);
221 out_irq_init:
222 return ret;
223 }
224
pm805_probe(struct i2c_client * client,const struct i2c_device_id * id)225 static 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
249 err_805_init:
250 pm80x_deinit();
251 out_init:
252 return ret;
253 }
254
pm805_remove(struct i2c_client * client)255 static 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
267 static 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
pm805_i2c_init(void)277 static int __init pm805_i2c_init(void)
278 {
279 return i2c_add_driver(&pm805_driver);
280 }
281 subsys_initcall(pm805_i2c_init);
282
pm805_i2c_exit(void)283 static void __exit pm805_i2c_exit(void)
284 {
285 i2c_del_driver(&pm805_driver);
286 }
287 module_exit(pm805_i2c_exit);
288
289 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM805");
290 MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
291 MODULE_LICENSE("GPL");
292