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author | Hans Verkuil <hverkuil@xs4all.nl> | 2008-07-25 15:31:23 +0200 |
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committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 13:36:47 +0200 |
commit | a832781cd383e70929c0ceece23f8a5b62e2152b (patch) | |
tree | 966f4f97ee68a0d62c59c431d7a00d63c4ac1a19 /drivers/media/video/tda9840.c | |
parent | V4L/DVB (8628): bttv: Add support for Encore ENLTV2-FM (diff) | |
download | linux-a832781cd383e70929c0ceece23f8a5b62e2152b.tar.xz linux-a832781cd383e70929c0ceece23f8a5b62e2152b.zip |
V4L/DVB (8630): First mxb cleanup phase
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/tda9840.c')
-rw-r--r-- | drivers/media/video/tda9840.c | 166 |
1 files changed, 58 insertions, 108 deletions
diff --git a/drivers/media/video/tda9840.c b/drivers/media/video/tda9840.c index 2437c1a269c5..57deeb893318 100644 --- a/drivers/media/video/tda9840.c +++ b/drivers/media/video/tda9840.c @@ -2,6 +2,7 @@ tda9840 - i2c-driver for the tda9840 by SGS Thomson Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> + Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> The tda9840 is a stereo/dual sound processor with digital identification. It can be found at address 0x84 on the i2c-bus. @@ -28,15 +29,18 @@ #include <linux/module.h> #include <linux/ioctl.h> #include <linux/i2c.h> - +#include <media/v4l2-common.h> +#include <media/v4l2-i2c-drv-legacy.h> #include "tda9840.h" -static int debug; /* insmod parameter */ +MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); +MODULE_DESCRIPTION("tda9840 driver"); +MODULE_LICENSE("GPL"); + +static int debug; module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off device debugging (default:off)."); -#define dprintk(args...) \ - do { if (debug) { printk("%s: %s()[%d]: ", KBUILD_MODNAME, __func__, __LINE__); printk(args); } } while (0) +MODULE_PARM_DESC(debug, "Debug level (0-1)"); #define SWITCH 0x00 #define LEVEL_ADJUST 0x02 @@ -49,18 +53,21 @@ static unsigned short normal_i2c[] = { I2C_ADDR_TDA9840, I2C_CLIENT_END }; /* magic definition of all other variables and things */ I2C_CLIENT_INSMOD; -static struct i2c_driver driver; -static struct i2c_client client_template; +static void tda9840_write(struct i2c_client *client, u8 reg, u8 val) +{ + if (i2c_smbus_write_byte_data(client, reg, val)) + v4l_dbg(1, debug, client, "error writing %02x to %02x\n", + val, reg); +} -static int command(struct i2c_client *client, unsigned int cmd, void *arg) +static int tda9840_command(struct i2c_client *client, unsigned cmd, void *arg) { int result; int byte = *(int *)arg; switch (cmd) { case TDA9840_SWITCH: - - dprintk("TDA9840_SWITCH: 0x%02x\n", byte); + v4l_dbg(1, debug, client, "TDA9840_SWITCH: 0x%02x\n", byte); if (byte != TDA9840_SET_MONO && byte != TDA9840_SET_MUTE @@ -73,14 +80,11 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg) return -EINVAL; } - result = i2c_smbus_write_byte_data(client, SWITCH, byte); - if (result) - dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result); + tda9840_write(client, SWITCH, byte); break; case TDA9840_LEVEL_ADJUST: - - dprintk("TDA9840_LEVEL_ADJUST: %d\n", byte); + v4l_dbg(1, debug, client, "TDA9840_LEVEL_ADJUST: %d\n", byte); /* check for correct range */ if (byte > 25 || byte < -20) @@ -92,15 +96,11 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg) byte += 0x8; else byte = -byte; - - result = i2c_smbus_write_byte_data(client, LEVEL_ADJUST, byte); - if (result) - dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result); + tda9840_write(client, LEVEL_ADJUST, byte); break; case TDA9840_STEREO_ADJUST: - - dprintk("TDA9840_STEREO_ADJUST: %d\n", byte); + v4l_dbg(1, debug, client, "TDA9840_STEREO_ADJUST: %d\n", byte); /* check for correct range */ if (byte > 25 || byte < -24) @@ -113,9 +113,7 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg) else byte = -byte; - result = i2c_smbus_write_byte_data(client, STEREO_ADJUST, byte); - if (result) - dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result); + tda9840_write(client, STEREO_ADJUST, byte); break; case TDA9840_DETECT: { @@ -123,29 +121,29 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg) byte = i2c_smbus_read_byte_data(client, STEREO_ADJUST); if (byte == -1) { - dprintk("i2c_smbus_read_byte_data() failed\n"); + v4l_dbg(1, debug, client, + "i2c_smbus_read_byte_data() failed\n"); return -EIO; } - if (0 != (byte & 0x80)) { - dprintk("TDA9840_DETECT: register contents invalid\n"); + if (byte & 0x80) { + v4l_dbg(1, debug, client, + "TDA9840_DETECT: register contents invalid\n"); return -EINVAL; } - dprintk("TDA9840_DETECT: byte: 0x%02x\n", byte); - *ret = ((byte & 0x60) >> 5); + v4l_dbg(1, debug, client, "TDA9840_DETECT: byte: 0x%02x\n", byte); + *ret = (byte & 0x60) >> 5; result = 0; break; } case TDA9840_TEST: - dprintk("TDA9840_TEST: 0x%02x\n", byte); + v4l_dbg(1, debug, client, "TDA9840_TEST: 0x%02x\n", byte); /* mask out irrelevant bits */ byte &= 0x3; - result = i2c_smbus_write_byte_data(client, TEST, byte); - if (result) - dprintk("i2c_smbus_write_byte() failed, ret:%d\n", result); + tda9840_write(client, TEST, byte); break; default: return -ENOIOCTLCMD; @@ -157,99 +155,51 @@ static int command(struct i2c_client *client, unsigned int cmd, void *arg) return 0; } -static int detect(struct i2c_adapter *adapter, int address, int kind) +static int tda9840_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct i2c_client *client; - int result = 0; - - int byte = 0x0; + int result; + int byte; /* let's see whether this adapter can support what we need */ - if (0 == i2c_check_functionality(adapter, - I2C_FUNC_SMBUS_READ_BYTE_DATA | - I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) { + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BYTE_DATA | + I2C_FUNC_SMBUS_WRITE_BYTE_DATA)) return 0; - } - /* allocate memory for client structure */ - client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL); - if (!client) { - printk("not enough kernel memory\n"); - return -ENOMEM; - } - - /* fill client structure */ - memcpy(client, &client_template, sizeof(struct i2c_client)); - client->addr = address; - client->adapter = adapter; - - /* tell the i2c layer a new client has arrived */ - if (0 != (result = i2c_attach_client(client))) { - kfree(client); - return result; - } + v4l_info(client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); /* set initial values for level & stereo - adjustment, mode */ byte = 0; - result = command(client, TDA9840_LEVEL_ADJUST, &byte); - result += command(client, TDA9840_STEREO_ADJUST, &byte); + result = tda9840_command(client, TDA9840_LEVEL_ADJUST, &byte); + result += tda9840_command(client, TDA9840_STEREO_ADJUST, &byte); byte = TDA9840_SET_MONO; - result = command(client, TDA9840_SWITCH, &byte); + result = tda9840_command(client, TDA9840_SWITCH, &byte); if (result) { - dprintk("could not initialize tda9840\n"); + v4l_dbg(1, debug, client, "could not initialize tda9840\n"); return -ENODEV; } - - printk("tda9840: detected @ 0x%02x on adapter %s\n", address, &client->adapter->name[0]); return 0; } -static int attach(struct i2c_adapter *adapter) +static int tda9840_legacy_probe(struct i2c_adapter *adapter) { - /* let's see whether this is a know adapter we can attach to */ - if (adapter->id != I2C_HW_SAA7146) { - dprintk("refusing to probe on unknown adapter [name='%s',id=0x%x]\n", adapter->name, adapter->id); - return -ENODEV; - } - - return i2c_probe(adapter, &addr_data, &detect); + /* Let's see whether this is a known adapter we can attach to. + Prevents conflicts with tvaudio.c. */ + return adapter->id == I2C_HW_SAA7146; } - -static int detach(struct i2c_client *client) -{ - int ret = i2c_detach_client(client); - kfree(client); - return ret; -} - -static struct i2c_driver driver = { - .driver = { - .name = "tda9840", - }, - .id = I2C_DRIVERID_TDA9840, - .attach_adapter = attach, - .detach_client = detach, - .command = command, +static const struct i2c_device_id tda9840_id[] = { + { "tda9840", 0 }, + { } }; +MODULE_DEVICE_TABLE(i2c, tda9840_id); -static struct i2c_client client_template = { +static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "tda9840", - .driver = &driver, + .driverid = I2C_DRIVERID_TDA9840, + .command = tda9840_command, + .probe = tda9840_probe, + .legacy_probe = tda9840_legacy_probe, + .id_table = tda9840_id, }; - -static int __init this_module_init(void) -{ - return i2c_add_driver(&driver); -} - -static void __exit this_module_exit(void) -{ - i2c_del_driver(&driver); -} - -module_init(this_module_init); -module_exit(this_module_exit); - -MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); -MODULE_DESCRIPTION("tda9840 driver"); -MODULE_LICENSE("GPL"); |