/* * 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/videodev.h> #include <media/v4l2-common.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 { int radio; u32 audmode; }; static void vp27smpx_set_audmode(struct i2c_client *client, u32 audmode) { struct vp27smpx_state *state = i2c_get_clientdata(client); 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)) v4l_err(client, "%s: I/O error setting audmode\n", client->name); else state->audmode = audmode; } static int vp27smpx_command(struct i2c_client *client, unsigned cmd, void *arg) { struct vp27smpx_state *state = i2c_get_clientdata(client); struct v4l2_tuner *vt = arg; switch (cmd) { case AUDC_SET_RADIO: state->radio = 1; break; case VIDIOC_S_STD: state->radio = 0; break; case VIDIOC_S_TUNER: if (!state->radio) vp27smpx_set_audmode(client, vt->audmode); break; case VIDIOC_G_TUNER: if (state->radio) break; vt->audmode = state->audmode; vt->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2; vt->rxsubchans = V4L2_TUNER_SUB_MONO; break; case VIDIOC_G_CHIP_IDENT: return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_VP27SMPX, 0); case VIDIOC_LOG_STATUS: v4l_info(client, "Audio Mode: %u%s\n", state->audmode, state->radio ? " (Radio)" : ""); break; default: return -EINVAL; } return 0; } /* ----------------------------------------------------------------------- */ /* 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; /* 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; state->audmode = V4L2_TUNER_MODE_STEREO; i2c_set_clientdata(client, state); /* initialize vp27smpx */ vp27smpx_set_audmode(client, state->audmode); return 0; } static int vp27smpx_remove(struct i2c_client *client) { kfree(i2c_get_clientdata(client)); 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, };