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1/*
2 * MFD driver for wl1273 FM radio and audio codec submodules.
3 *
4 * Copyright (C) 2011 Nokia Corporation
5 * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 *
21 */
22
23#include <linux/mfd/wl1273-core.h>
24#include <linux/slab.h>
25#include <linux/module.h>
26
27#define DRIVER_DESC "WL1273 FM Radio Core"
28
29static const struct i2c_device_id wl1273_driver_id_table[] = {
30 { WL1273_FM_DRIVER_NAME, 0 },
31 { }
32};
33MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
34
35static int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value)
36{
37 struct i2c_client *client = core->client;
38 u8 b[2];
39 int r;
40
41 r = i2c_smbus_read_i2c_block_data(client, reg, sizeof(b), b);
42 if (r != 2) {
43 dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
44 return -EREMOTEIO;
45 }
46
47 *value = (u16)b[0] << 8 | b[1];
48
49 return 0;
50}
51
52static int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
53{
54 struct i2c_client *client = core->client;
55 u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
56 int r;
57
58 r = i2c_smbus_write_i2c_block_data(client, cmd, sizeof(buf), buf);
59 if (r) {
60 dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
61 return r;
62 }
63
64 return 0;
65}
66
67static int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len)
68{
69 struct i2c_client *client = core->client;
70 struct i2c_msg msg;
71 int r;
72
73 msg.addr = client->addr;
74 msg.flags = 0;
75 msg.buf = data;
76 msg.len = len;
77
78 r = i2c_transfer(client->adapter, &msg, 1);
79 if (r != 1) {
80 dev_err(&client->dev, "%s: write error.\n", __func__);
81 return -EREMOTEIO;
82 }
83
84 return 0;
85}
86
87/**
88 * wl1273_fm_set_audio() - Set audio mode.
89 * @core: A pointer to the device struct.
90 * @new_mode: The new audio mode.
91 *
92 * Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
93 */
94static int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
95{
96 int r = 0;
97
98 if (core->mode == WL1273_MODE_OFF ||
99 core->mode == WL1273_MODE_SUSPENDED)
100 return -EPERM;
101
102 if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
103 r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
104 WL1273_PCM_DEF_MODE);
105 if (r)
106 goto out;
107
108 r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
109 core->i2s_mode);
110 if (r)
111 goto out;
112
113 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
114 WL1273_AUDIO_ENABLE_I2S);
115 if (r)
116 goto out;
117
118 } else if (core->mode == WL1273_MODE_RX &&
119 new_mode == WL1273_AUDIO_ANALOG) {
120 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
121 WL1273_AUDIO_ENABLE_ANALOG);
122 if (r)
123 goto out;
124
125 } else if (core->mode == WL1273_MODE_TX &&
126 new_mode == WL1273_AUDIO_DIGITAL) {
127 r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
128 core->i2s_mode);
129 if (r)
130 goto out;
131
132 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
133 WL1273_AUDIO_IO_SET_I2S);
134 if (r)
135 goto out;
136
137 } else if (core->mode == WL1273_MODE_TX &&
138 new_mode == WL1273_AUDIO_ANALOG) {
139 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
140 WL1273_AUDIO_IO_SET_ANALOG);
141 if (r)
142 goto out;
143 }
144
145 core->audio_mode = new_mode;
146out:
147 return r;
148}
149
150/**
151 * wl1273_fm_set_volume() - Set volume.
152 * @core: A pointer to the device struct.
153 * @volume: The new volume value.
154 */
155static int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
156{
157 int r;
158
159 if (volume > WL1273_MAX_VOLUME)
160 return -EINVAL;
161
162 if (core->volume == volume)
163 return 0;
164
165 r = wl1273_fm_write_cmd(core, WL1273_VOLUME_SET, volume);
166 if (r)
167 return r;
168
169 core->volume = volume;
170 return 0;
171}
172
173static int wl1273_core_remove(struct i2c_client *client)
174{
175 dev_dbg(&client->dev, "%s\n", __func__);
176
177 mfd_remove_devices(&client->dev);
178
179 return 0;
180}
181
182static int wl1273_core_probe(struct i2c_client *client,
183 const struct i2c_device_id *id)
184{
185 struct wl1273_fm_platform_data *pdata = dev_get_platdata(&client->dev);
186 struct wl1273_core *core;
187 struct mfd_cell *cell;
188 int children = 0;
189 int r = 0;
190
191 dev_dbg(&client->dev, "%s\n", __func__);
192
193 if (!pdata) {
194 dev_err(&client->dev, "No platform data.\n");
195 return -EINVAL;
196 }
197
198 if (!(pdata->children & WL1273_RADIO_CHILD)) {
199 dev_err(&client->dev, "Cannot function without radio child.\n");
200 return -EINVAL;
201 }
202
203 core = devm_kzalloc(&client->dev, sizeof(*core), GFP_KERNEL);
204 if (!core)
205 return -ENOMEM;
206
207 core->pdata = pdata;
208 core->client = client;
209 mutex_init(&core->lock);
210
211 i2c_set_clientdata(client, core);
212
213 dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
214
215 cell = &core->cells[children];
216 cell->name = "wl1273_fm_radio";
217 cell->platform_data = &core;
218 cell->pdata_size = sizeof(core);
219 children++;
220
221 core->read = wl1273_fm_read_reg;
222 core->write = wl1273_fm_write_cmd;
223 core->write_data = wl1273_fm_write_data;
224 core->set_audio = wl1273_fm_set_audio;
225 core->set_volume = wl1273_fm_set_volume;
226
227 if (pdata->children & WL1273_CODEC_CHILD) {
228 cell = &core->cells[children];
229
230 dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
231 cell->name = "wl1273-codec";
232 cell->platform_data = &core;
233 cell->pdata_size = sizeof(core);
234 children++;
235 }
236
237 dev_dbg(&client->dev, "%s: number of children: %d.\n",
238 __func__, children);
239
240 r = mfd_add_devices(&client->dev, -1, core->cells,
241 children, NULL, 0, NULL);
242 if (r)
243 goto err;
244
245 return 0;
246
247err:
248 pdata->free_resources();
249
250 dev_dbg(&client->dev, "%s\n", __func__);
251
252 return r;
253}
254
255static struct i2c_driver wl1273_core_driver = {
256 .driver = {
257 .name = WL1273_FM_DRIVER_NAME,
258 },
259 .probe = wl1273_core_probe,
260 .id_table = wl1273_driver_id_table,
261 .remove = wl1273_core_remove,
262};
263
264static int __init wl1273_core_init(void)
265{
266 int r;
267
268 r = i2c_add_driver(&wl1273_core_driver);
269 if (r) {
270 pr_err(WL1273_FM_DRIVER_NAME
271 ": driver registration failed\n");
272 return r;
273 }
274
275 return r;
276}
277
278static void __exit wl1273_core_exit(void)
279{
280 i2c_del_driver(&wl1273_core_driver);
281}
282late_initcall(wl1273_core_init);
283module_exit(wl1273_core_exit);
284
285MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
286MODULE_DESCRIPTION(DRIVER_DESC);
287MODULE_LICENSE("GPL");
1/*
2 * MFD driver for wl1273 FM radio and audio codec submodules.
3 *
4 * Copyright (C) 2011 Nokia Corporation
5 * Author: Matti Aaltonen <matti.j.aaltonen@nokia.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
19 * 02110-1301 USA
20 *
21 */
22
23#include <linux/mfd/wl1273-core.h>
24#include <linux/slab.h>
25#include <linux/module.h>
26
27#define DRIVER_DESC "WL1273 FM Radio Core"
28
29static const struct i2c_device_id wl1273_driver_id_table[] = {
30 { WL1273_FM_DRIVER_NAME, 0 },
31 { }
32};
33MODULE_DEVICE_TABLE(i2c, wl1273_driver_id_table);
34
35static int wl1273_fm_read_reg(struct wl1273_core *core, u8 reg, u16 *value)
36{
37 struct i2c_client *client = core->client;
38 u8 b[2];
39 int r;
40
41 r = i2c_smbus_read_i2c_block_data(client, reg, sizeof(b), b);
42 if (r != 2) {
43 dev_err(&client->dev, "%s: Read: %d fails.\n", __func__, reg);
44 return -EREMOTEIO;
45 }
46
47 *value = (u16)b[0] << 8 | b[1];
48
49 return 0;
50}
51
52static int wl1273_fm_write_cmd(struct wl1273_core *core, u8 cmd, u16 param)
53{
54 struct i2c_client *client = core->client;
55 u8 buf[] = { (param >> 8) & 0xff, param & 0xff };
56 int r;
57
58 r = i2c_smbus_write_i2c_block_data(client, cmd, sizeof(buf), buf);
59 if (r) {
60 dev_err(&client->dev, "%s: Cmd: %d fails.\n", __func__, cmd);
61 return r;
62 }
63
64 return 0;
65}
66
67static int wl1273_fm_write_data(struct wl1273_core *core, u8 *data, u16 len)
68{
69 struct i2c_client *client = core->client;
70 struct i2c_msg msg;
71 int r;
72
73 msg.addr = client->addr;
74 msg.flags = 0;
75 msg.buf = data;
76 msg.len = len;
77
78 r = i2c_transfer(client->adapter, &msg, 1);
79 if (r != 1) {
80 dev_err(&client->dev, "%s: write error.\n", __func__);
81 return -EREMOTEIO;
82 }
83
84 return 0;
85}
86
87/**
88 * wl1273_fm_set_audio() - Set audio mode.
89 * @core: A pointer to the device struct.
90 * @new_mode: The new audio mode.
91 *
92 * Audio modes are WL1273_AUDIO_DIGITAL and WL1273_AUDIO_ANALOG.
93 */
94static int wl1273_fm_set_audio(struct wl1273_core *core, unsigned int new_mode)
95{
96 int r = 0;
97
98 if (core->mode == WL1273_MODE_OFF ||
99 core->mode == WL1273_MODE_SUSPENDED)
100 return -EPERM;
101
102 if (core->mode == WL1273_MODE_RX && new_mode == WL1273_AUDIO_DIGITAL) {
103 r = wl1273_fm_write_cmd(core, WL1273_PCM_MODE_SET,
104 WL1273_PCM_DEF_MODE);
105 if (r)
106 goto out;
107
108 r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
109 core->i2s_mode);
110 if (r)
111 goto out;
112
113 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
114 WL1273_AUDIO_ENABLE_I2S);
115 if (r)
116 goto out;
117
118 } else if (core->mode == WL1273_MODE_RX &&
119 new_mode == WL1273_AUDIO_ANALOG) {
120 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_ENABLE,
121 WL1273_AUDIO_ENABLE_ANALOG);
122 if (r)
123 goto out;
124
125 } else if (core->mode == WL1273_MODE_TX &&
126 new_mode == WL1273_AUDIO_DIGITAL) {
127 r = wl1273_fm_write_cmd(core, WL1273_I2S_MODE_CONFIG_SET,
128 core->i2s_mode);
129 if (r)
130 goto out;
131
132 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
133 WL1273_AUDIO_IO_SET_I2S);
134 if (r)
135 goto out;
136
137 } else if (core->mode == WL1273_MODE_TX &&
138 new_mode == WL1273_AUDIO_ANALOG) {
139 r = wl1273_fm_write_cmd(core, WL1273_AUDIO_IO_SET,
140 WL1273_AUDIO_IO_SET_ANALOG);
141 if (r)
142 goto out;
143 }
144
145 core->audio_mode = new_mode;
146out:
147 return r;
148}
149
150/**
151 * wl1273_fm_set_volume() - Set volume.
152 * @core: A pointer to the device struct.
153 * @volume: The new volume value.
154 */
155static int wl1273_fm_set_volume(struct wl1273_core *core, unsigned int volume)
156{
157 int r;
158
159 if (volume > WL1273_MAX_VOLUME)
160 return -EINVAL;
161
162 if (core->volume == volume)
163 return 0;
164
165 r = wl1273_fm_write_cmd(core, WL1273_VOLUME_SET, volume);
166 if (r)
167 return r;
168
169 core->volume = volume;
170 return 0;
171}
172
173static int wl1273_core_remove(struct i2c_client *client)
174{
175 struct wl1273_core *core = i2c_get_clientdata(client);
176
177 dev_dbg(&client->dev, "%s\n", __func__);
178
179 mfd_remove_devices(&client->dev);
180 kfree(core);
181
182 return 0;
183}
184
185static int __devinit wl1273_core_probe(struct i2c_client *client,
186 const struct i2c_device_id *id)
187{
188 struct wl1273_fm_platform_data *pdata = client->dev.platform_data;
189 struct wl1273_core *core;
190 struct mfd_cell *cell;
191 int children = 0;
192 int r = 0;
193
194 dev_dbg(&client->dev, "%s\n", __func__);
195
196 if (!pdata) {
197 dev_err(&client->dev, "No platform data.\n");
198 return -EINVAL;
199 }
200
201 if (!(pdata->children & WL1273_RADIO_CHILD)) {
202 dev_err(&client->dev, "Cannot function without radio child.\n");
203 return -EINVAL;
204 }
205
206 core = kzalloc(sizeof(*core), GFP_KERNEL);
207 if (!core)
208 return -ENOMEM;
209
210 core->pdata = pdata;
211 core->client = client;
212 mutex_init(&core->lock);
213
214 i2c_set_clientdata(client, core);
215
216 dev_dbg(&client->dev, "%s: Have V4L2.\n", __func__);
217
218 cell = &core->cells[children];
219 cell->name = "wl1273_fm_radio";
220 cell->platform_data = &core;
221 cell->pdata_size = sizeof(core);
222 children++;
223
224 core->read = wl1273_fm_read_reg;
225 core->write = wl1273_fm_write_cmd;
226 core->write_data = wl1273_fm_write_data;
227 core->set_audio = wl1273_fm_set_audio;
228 core->set_volume = wl1273_fm_set_volume;
229
230 if (pdata->children & WL1273_CODEC_CHILD) {
231 cell = &core->cells[children];
232
233 dev_dbg(&client->dev, "%s: Have codec.\n", __func__);
234 cell->name = "wl1273-codec";
235 cell->platform_data = &core;
236 cell->pdata_size = sizeof(core);
237 children++;
238 }
239
240 dev_dbg(&client->dev, "%s: number of children: %d.\n",
241 __func__, children);
242
243 r = mfd_add_devices(&client->dev, -1, core->cells,
244 children, NULL, 0);
245 if (r)
246 goto err;
247
248 return 0;
249
250err:
251 pdata->free_resources();
252 kfree(core);
253
254 dev_dbg(&client->dev, "%s\n", __func__);
255
256 return r;
257}
258
259static struct i2c_driver wl1273_core_driver = {
260 .driver = {
261 .name = WL1273_FM_DRIVER_NAME,
262 },
263 .probe = wl1273_core_probe,
264 .id_table = wl1273_driver_id_table,
265 .remove = __devexit_p(wl1273_core_remove),
266};
267
268static int __init wl1273_core_init(void)
269{
270 int r;
271
272 r = i2c_add_driver(&wl1273_core_driver);
273 if (r) {
274 pr_err(WL1273_FM_DRIVER_NAME
275 ": driver registration failed\n");
276 return r;
277 }
278
279 return r;
280}
281
282static void __exit wl1273_core_exit(void)
283{
284 i2c_del_driver(&wl1273_core_driver);
285}
286late_initcall(wl1273_core_init);
287module_exit(wl1273_core_exit);
288
289MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>");
290MODULE_DESCRIPTION(DRIVER_DESC);
291MODULE_LICENSE("GPL");