/* * vp27smpx - driver version 0.0.1 * * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> * * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com> * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/module.h> #include <linux/types.h> #include <linux/ioctl.h> #include <asm/uaccess.h> #include <linux/i2c.h> #include <linux/i2c-id.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/v4l2-chip-ident.h> #include <media/v4l2-i2c-drv.h> MODULE_DESCRIPTION("vp27smpx driver"); MODULE_AUTHOR("Hans Verkuil"); MODULE_LICENSE("GPL"); /* ----------------------------------------------------------------------- */ struct vp27smpx_state { struct v4l2_subdev sd; int radio; u32 audmode; }; static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct vp27smpx_state, sd); } static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode) { struct vp27smpx_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); u8 data[3] = { 0x00, 0x00, 0x04 }; switch (audmode) { case V4L2_TUNER_MODE_MONO: case V4L2_TUNER_MODE_LANG1: break; case V4L2_TUNER_MODE_STEREO: case V4L2_TUNER_MODE_LANG1_LANG2: data[1] = 0x01; break; case V4L2_TUNER_MODE_LANG2: data[1] = 0x02; break; } if (i2c_master_send(client, data, sizeof(data)) != sizeof(data)) v4l2_err(sd, "I/O error setting audmode\n"); else state->audmode = audmode; } static int vp27smpx_s_radio(struct v4l2_subdev *sd) { struct vp27smpx_state *state = to_state(sd); state->radio = 1; return 0; } static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) { struct vp27smpx_state *state = to_state(sd); state->radio = 0; return 0; } static int vp27smpx_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) { struct vp27smpx_state *state = to_state(sd); if (!state->radio) vp27smpx_set_audmode(sd, vt->audmode); return 0; } static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt) { struct vp27smpx_state *state = to_state(sd); if (state->radio) return 0; vt->audmode = state->audmode; vt->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2; vt->rxsubchans = V4L2_TUNER_SUB_MONO; return 0; } static int vp27smpx_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) { struct i2c_client *client = v4l2_get_subdevdata(sd); return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_VP27SMPX, 0); } static int vp27smpx_log_status(struct v4l2_subdev *sd) { struct vp27smpx_state *state = to_state(sd); v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode, state->radio ? " (Radio)" : ""); return 0; } static int vp27smpx_command(struct i2c_client *client, unsigned cmd, void *arg) { return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg); } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops vp27smpx_core_ops = { .log_status = vp27smpx_log_status, .g_chip_ident = vp27smpx_g_chip_ident, }; static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = { .s_radio = vp27smpx_s_radio, .s_std = vp27smpx_s_std, .s_tuner = vp27smpx_s_tuner, .g_tuner = vp27smpx_g_tuner, }; static const struct v4l2_subdev_ops vp27smpx_ops = { .core = &vp27smpx_core_ops, .tuner = &vp27smpx_tuner_ops, }; /* ----------------------------------------------------------------------- */ /* i2c implementation */ /* * Generic i2c probe * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' */ static int vp27smpx_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct vp27smpx_state *state; struct v4l2_subdev *sd; /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL); if (state == NULL) return -ENOMEM; sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops); state->audmode = V4L2_TUNER_MODE_STEREO; /* initialize vp27smpx */ vp27smpx_set_audmode(sd, state->audmode); return 0; } static int vp27smpx_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); kfree(to_state(sd)); return 0; } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id vp27smpx_id[] = { { "vp27smpx", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, vp27smpx_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "vp27smpx", .driverid = I2C_DRIVERID_VP27SMPX, .command = vp27smpx_command, .probe = vp27smpx_probe, .remove = vp27smpx_remove, .id_table = vp27smpx_id, };