Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 1 | /* |
| 2 | * drivers/media/radio/radio-si4713.c |
| 3 | * |
| 4 | * Platform Driver for Silicon Labs Si4713 FM Radio Transmitter: |
| 5 | * |
| 6 | * Copyright (c) 2008 Instituto Nokia de Tecnologia - INdT |
| 7 | * Contact: Eduardo Valentin <eduardo.valentin@nokia.com> |
| 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 | |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/i2c.h> |
| 29 | #include <linux/videodev2.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 30 | #include <linux/slab.h> |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 31 | #include <media/v4l2-device.h> |
| 32 | #include <media/v4l2-common.h> |
| 33 | #include <media/v4l2-ioctl.h> |
Hans Verkuil | cd29ed8 | 2013-04-08 07:23:32 -0300 | [diff] [blame] | 34 | #include <media/v4l2-fh.h> |
| 35 | #include <media/v4l2-ctrls.h> |
| 36 | #include <media/v4l2-event.h> |
Sebastian Reichel | 98bea62 | 2014-11-10 17:34:41 -0300 | [diff] [blame] | 37 | #include "si4713.h" |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 38 | |
| 39 | /* module parameters */ |
| 40 | static int radio_nr = -1; /* radio device minor (-1 ==> auto assign) */ |
| 41 | module_param(radio_nr, int, 0); |
| 42 | MODULE_PARM_DESC(radio_nr, |
| 43 | "Minor number for radio device (-1 ==> auto assign)"); |
| 44 | |
Eduardo Valentin | a782ae0 | 2013-03-19 11:41:32 -0300 | [diff] [blame] | 45 | MODULE_LICENSE("GPL v2"); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 46 | MODULE_AUTHOR("Eduardo Valentin <eduardo.valentin@nokia.com>"); |
| 47 | MODULE_DESCRIPTION("Platform driver for Si4713 FM Radio Transmitter"); |
| 48 | MODULE_VERSION("0.0.1"); |
Eduardo Valentin | 04e1ac0 | 2013-03-19 11:41:34 -0300 | [diff] [blame] | 49 | MODULE_ALIAS("platform:radio-si4713"); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 50 | |
| 51 | /* Driver state struct */ |
| 52 | struct radio_si4713_device { |
| 53 | struct v4l2_device v4l2_dev; |
Hans Verkuil | fdf5159 | 2013-04-08 06:11:12 -0300 | [diff] [blame] | 54 | struct video_device radio_dev; |
Hans Verkuil | 55b2a31 | 2013-04-08 06:31:30 -0300 | [diff] [blame] | 55 | struct mutex lock; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 56 | }; |
| 57 | |
| 58 | /* radio_si4713_fops - file operations interface */ |
| 59 | static const struct v4l2_file_operations radio_si4713_fops = { |
| 60 | .owner = THIS_MODULE, |
Hans Verkuil | cd29ed8 | 2013-04-08 07:23:32 -0300 | [diff] [blame] | 61 | .open = v4l2_fh_open, |
| 62 | .release = v4l2_fh_release, |
| 63 | .poll = v4l2_ctrl_poll, |
Hans Verkuil | 725ea8c | 2010-11-14 09:48:24 -0300 | [diff] [blame] | 64 | /* Note: locking is done at the subdev level in the i2c driver. */ |
| 65 | .unlocked_ioctl = video_ioctl2, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | /* Video4Linux Interface */ |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 69 | |
| 70 | /* radio_si4713_querycap - query device capabilities */ |
| 71 | static int radio_si4713_querycap(struct file *file, void *priv, |
| 72 | struct v4l2_capability *capability) |
| 73 | { |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 74 | strlcpy(capability->driver, "radio-si4713", sizeof(capability->driver)); |
| 75 | strlcpy(capability->card, "Silicon Labs Si4713 Modulator", |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 76 | sizeof(capability->card)); |
Hans Verkuil | a58841d | 2013-04-08 06:27:43 -0300 | [diff] [blame] | 77 | strlcpy(capability->bus_info, "platform:radio-si4713", |
| 78 | sizeof(capability->bus_info)); |
| 79 | capability->device_caps = V4L2_CAP_MODULATOR | V4L2_CAP_RDS_OUTPUT; |
| 80 | capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 85 | /* |
| 86 | * v4l2 ioctl call backs. |
| 87 | * we are just a wrapper for v4l2_sub_devs. |
| 88 | */ |
| 89 | static inline struct v4l2_device *get_v4l2_dev(struct file *file) |
| 90 | { |
| 91 | return &((struct radio_si4713_device *)video_drvdata(file))->v4l2_dev; |
| 92 | } |
| 93 | |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 94 | static int radio_si4713_g_modulator(struct file *file, void *p, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 95 | struct v4l2_modulator *vm) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 96 | { |
| 97 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 98 | g_modulator, vm); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static int radio_si4713_s_modulator(struct file *file, void *p, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 102 | const struct v4l2_modulator *vm) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 103 | { |
| 104 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 105 | s_modulator, vm); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 106 | } |
| 107 | |
| 108 | static int radio_si4713_g_frequency(struct file *file, void *p, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 109 | struct v4l2_frequency *vf) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 110 | { |
| 111 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 112 | g_frequency, vf); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 113 | } |
| 114 | |
| 115 | static int radio_si4713_s_frequency(struct file *file, void *p, |
Hans Verkuil | b530a44 | 2013-03-19 04:09:26 -0300 | [diff] [blame] | 116 | const struct v4l2_frequency *vf) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 117 | { |
| 118 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, tuner, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 119 | s_frequency, vf); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 120 | } |
| 121 | |
Hans Verkuil | 99cd47bc | 2011-03-11 19:00:56 -0300 | [diff] [blame] | 122 | static long radio_si4713_default(struct file *file, void *p, |
Mauro Carvalho Chehab | 6d43be7 | 2013-03-26 08:04:52 -0300 | [diff] [blame] | 123 | bool valid_prio, unsigned int cmd, void *arg) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 124 | { |
| 125 | return v4l2_device_call_until_err(get_v4l2_dev(file), 0, core, |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 126 | ioctl, cmd, arg); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | static struct v4l2_ioctl_ops radio_si4713_ioctl_ops = { |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 130 | .vidioc_querycap = radio_si4713_querycap, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 131 | .vidioc_g_modulator = radio_si4713_g_modulator, |
| 132 | .vidioc_s_modulator = radio_si4713_s_modulator, |
| 133 | .vidioc_g_frequency = radio_si4713_g_frequency, |
| 134 | .vidioc_s_frequency = radio_si4713_s_frequency, |
Hans Verkuil | cd29ed8 | 2013-04-08 07:23:32 -0300 | [diff] [blame] | 135 | .vidioc_log_status = v4l2_ctrl_log_status, |
| 136 | .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| 137 | .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 138 | .vidioc_default = radio_si4713_default, |
| 139 | }; |
| 140 | |
| 141 | /* radio_si4713_vdev_template - video device interface */ |
| 142 | static struct video_device radio_si4713_vdev_template = { |
| 143 | .fops = &radio_si4713_fops, |
| 144 | .name = "radio-si4713", |
Hans Verkuil | fdf5159 | 2013-04-08 06:11:12 -0300 | [diff] [blame] | 145 | .release = video_device_release_empty, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 146 | .ioctl_ops = &radio_si4713_ioctl_ops, |
Hans Verkuil | ce4a3d5 | 2013-01-05 08:52:12 -0300 | [diff] [blame] | 147 | .vfl_dir = VFL_DIR_TX, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 148 | }; |
| 149 | |
| 150 | /* Platform driver interface */ |
| 151 | /* radio_si4713_pdriver_probe - probe for the device */ |
| 152 | static int radio_si4713_pdriver_probe(struct platform_device *pdev) |
| 153 | { |
| 154 | struct radio_si4713_platform_data *pdata = pdev->dev.platform_data; |
| 155 | struct radio_si4713_device *rsdev; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 156 | struct v4l2_subdev *sd; |
| 157 | int rval = 0; |
| 158 | |
| 159 | if (!pdata) { |
| 160 | dev_err(&pdev->dev, "Cannot proceed without platform data.\n"); |
| 161 | rval = -EINVAL; |
| 162 | goto exit; |
| 163 | } |
| 164 | |
Julia Lawall | 28e9cc8 | 2012-07-31 05:21:36 -0300 | [diff] [blame] | 165 | rsdev = devm_kzalloc(&pdev->dev, sizeof(*rsdev), GFP_KERNEL); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 166 | if (!rsdev) { |
| 167 | dev_err(&pdev->dev, "Failed to alloc video device.\n"); |
| 168 | rval = -ENOMEM; |
| 169 | goto exit; |
| 170 | } |
Hans Verkuil | 55b2a31 | 2013-04-08 06:31:30 -0300 | [diff] [blame] | 171 | mutex_init(&rsdev->lock); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 172 | |
| 173 | rval = v4l2_device_register(&pdev->dev, &rsdev->v4l2_dev); |
| 174 | if (rval) { |
| 175 | dev_err(&pdev->dev, "Failed to register v4l2 device.\n"); |
Julia Lawall | 28e9cc8 | 2012-07-31 05:21:36 -0300 | [diff] [blame] | 176 | goto exit; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 177 | } |
| 178 | |
Sebastian Reichel | 98bea62 | 2014-11-10 17:34:41 -0300 | [diff] [blame] | 179 | sd = i2c_get_clientdata(pdata->subdev); |
| 180 | rval = v4l2_device_register_subdev(&rsdev->v4l2_dev, sd); |
| 181 | if (rval) { |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 182 | dev_err(&pdev->dev, "Cannot get v4l2 subdevice\n"); |
Sebastian Reichel | 98bea62 | 2014-11-10 17:34:41 -0300 | [diff] [blame] | 183 | goto unregister_v4l2_dev; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 184 | } |
| 185 | |
Hans Verkuil | fdf5159 | 2013-04-08 06:11:12 -0300 | [diff] [blame] | 186 | rsdev->radio_dev = radio_si4713_vdev_template; |
| 187 | rsdev->radio_dev.v4l2_dev = &rsdev->v4l2_dev; |
Hans Verkuil | 03aa1bc | 2013-04-08 17:27:18 -0300 | [diff] [blame] | 188 | rsdev->radio_dev.ctrl_handler = sd->ctrl_handler; |
Hans Verkuil | 55b2a31 | 2013-04-08 06:31:30 -0300 | [diff] [blame] | 189 | /* Serialize all access to the si4713 */ |
| 190 | rsdev->radio_dev.lock = &rsdev->lock; |
Hans Verkuil | fdf5159 | 2013-04-08 06:11:12 -0300 | [diff] [blame] | 191 | video_set_drvdata(&rsdev->radio_dev, rsdev); |
| 192 | if (video_register_device(&rsdev->radio_dev, VFL_TYPE_RADIO, radio_nr)) { |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 193 | dev_err(&pdev->dev, "Could not register video device.\n"); |
| 194 | rval = -EIO; |
Sebastian Reichel | 98bea62 | 2014-11-10 17:34:41 -0300 | [diff] [blame] | 195 | goto unregister_v4l2_dev; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 196 | } |
| 197 | dev_info(&pdev->dev, "New device successfully probed\n"); |
| 198 | |
| 199 | goto exit; |
| 200 | |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 201 | unregister_v4l2_dev: |
| 202 | v4l2_device_unregister(&rsdev->v4l2_dev); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 203 | exit: |
| 204 | return rval; |
| 205 | } |
| 206 | |
| 207 | /* radio_si4713_pdriver_remove - remove the device */ |
Dmitry Torokhov | bf30690 | 2013-02-26 03:17:27 -0300 | [diff] [blame] | 208 | static int radio_si4713_pdriver_remove(struct platform_device *pdev) |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 209 | { |
| 210 | struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 211 | struct radio_si4713_device *rsdev; |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 212 | |
Eduardo Valentin | 385624a | 2013-03-19 11:41:31 -0300 | [diff] [blame] | 213 | rsdev = container_of(v4l2_dev, struct radio_si4713_device, v4l2_dev); |
Hans Verkuil | fdf5159 | 2013-04-08 06:11:12 -0300 | [diff] [blame] | 214 | video_unregister_device(&rsdev->radio_dev); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 215 | v4l2_device_unregister(&rsdev->v4l2_dev); |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 216 | |
| 217 | return 0; |
| 218 | } |
| 219 | |
| 220 | static struct platform_driver radio_si4713_pdriver = { |
| 221 | .driver = { |
| 222 | .name = "radio-si4713", |
| 223 | }, |
| 224 | .probe = radio_si4713_pdriver_probe, |
Dmitry Torokhov | bf30690 | 2013-02-26 03:17:27 -0300 | [diff] [blame] | 225 | .remove = radio_si4713_pdriver_remove, |
Eduardo Valentin | 1fd2121 | 2009-08-08 08:45:49 -0300 | [diff] [blame] | 226 | }; |
| 227 | |
Axel Lin | 1d6629b | 2012-01-10 03:21:49 -0300 | [diff] [blame] | 228 | module_platform_driver(radio_si4713_pdriver); |