V4L/DVB (9207): saa7185: convert i2c driver for new i2c API
- Convert to use v4l2-i2c-drv-legacy.h to be able to handle the new i2c API - Cleanups - Use v4l_dbg/v4l_info to have uniform kernel messages Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
b3286f6f52
commit
0afb351e62
@ -25,43 +25,25 @@
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/signal.h>
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#include <linux/types.h>
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#include <linux/i2c.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/i2c-id.h>
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#include <linux/videodev.h>
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#include <linux/video_encoder.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-i2c-drv-legacy.h>
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MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
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MODULE_AUTHOR("Dave Perks");
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MODULE_LICENSE("GPL");
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#define I2C_NAME(s) (s)->name
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static int debug;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-1)");
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#define dprintk(num, format, args...) \
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do { \
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if (debug >= num) \
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printk(format, ##args); \
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} while (0)
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/* ----------------------------------------------------------------------- */
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struct saa7185 {
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@ -75,32 +57,24 @@ struct saa7185 {
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int sat;
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};
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#define I2C_SAA7185 0x88
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/* ----------------------------------------------------------------------- */
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static inline int
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saa7185_read (struct i2c_client *client)
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static inline int saa7185_read(struct i2c_client *client)
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{
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return i2c_smbus_read_byte(client);
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}
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static int
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saa7185_write (struct i2c_client *client,
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u8 reg,
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u8 value)
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static int saa7185_write(struct i2c_client *client, u8 reg, u8 value)
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{
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struct saa7185 *encoder = i2c_get_clientdata(client);
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dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
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v4l_dbg(1, debug, client, "%02x set to %02x\n", reg, value);
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encoder->reg[reg] = value;
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int
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saa7185_write_block (struct i2c_client *client,
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const u8 *data,
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unsigned int len)
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static int saa7185_write_block(struct i2c_client *client,
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const u8 *data, unsigned int len)
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{
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int ret = -1;
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u8 reg;
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@ -121,18 +95,17 @@ saa7185_write_block (struct i2c_client *client,
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encoder->reg[reg++] = data[1];
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len -= 2;
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data += 2;
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} while (len >= 2 && data[0] == reg &&
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block_len < 32);
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if ((ret = i2c_master_send(client, block_data,
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block_len)) < 0)
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} while (len >= 2 && data[0] == reg && block_len < 32);
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ret = i2c_master_send(client, block_data, block_len);
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if (ret < 0)
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break;
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}
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} else {
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/* do some slow I2C emulation kind of thing */
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while (len >= 2) {
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reg = *data++;
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if ((ret = saa7185_write(client, reg,
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*data++)) < 0)
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ret = saa7185_write(client, reg, *data++);
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if (ret < 0)
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break;
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len -= 2;
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}
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@ -240,15 +213,11 @@ static const unsigned char init_ntsc[] = {
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0x66, 0x21, /* FSC3 */
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};
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static int
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saa7185_command (struct i2c_client *client,
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unsigned int cmd,
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void *arg)
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static int saa7185_command(struct i2c_client *client, unsigned cmd, void *arg)
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{
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struct saa7185 *encoder = i2c_get_clientdata(client);
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switch (cmd) {
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case 0:
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saa7185_write_block(client, init_common,
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sizeof(init_common));
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@ -264,7 +233,6 @@ saa7185_command (struct i2c_client *client,
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sizeof(init_pal));
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break;
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}
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break;
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case ENCODER_GET_CAPABILITIES:
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@ -276,8 +244,8 @@ saa7185_command (struct i2c_client *client,
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VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
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cap->inputs = 1;
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cap->outputs = 1;
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}
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break;
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}
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case ENCODER_SET_NORM:
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{
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@ -286,7 +254,6 @@ saa7185_command (struct i2c_client *client,
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//saa7185_write_block(client, init_common, sizeof(init_common));
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switch (*iarg) {
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case VIDEO_MODE_NTSC:
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saa7185_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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@ -300,11 +267,10 @@ saa7185_command (struct i2c_client *client,
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case VIDEO_MODE_SECAM:
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default:
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return -EINVAL;
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}
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encoder->norm = *iarg;
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}
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break;
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}
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case ENCODER_SET_INPUT:
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{
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@ -314,7 +280,6 @@ saa7185_command (struct i2c_client *client,
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*iarg = 1: input is from ZR36060 */
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switch (*iarg) {
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case 0:
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/* Switch RTCE to 1 */
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saa7185_write(client, 0x61,
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@ -332,21 +297,19 @@ saa7185_command (struct i2c_client *client,
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default:
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return -EINVAL;
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}
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}
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break;
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}
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case ENCODER_SET_OUTPUT:
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{
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int *iarg = arg;
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/* not much choice of outputs */
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if (*iarg != 0) {
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if (*iarg != 0)
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return -EINVAL;
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}
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}
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break;
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}
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case ENCODER_ENABLE_OUTPUT:
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{
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@ -356,8 +319,8 @@ saa7185_command (struct i2c_client *client,
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saa7185_write(client, 0x61,
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(encoder->reg[0x61] & 0xbf) |
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(encoder->enable ? 0x00 : 0x40));
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}
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break;
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}
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default:
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return -EINVAL;
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@ -368,138 +331,65 @@ saa7185_command (struct i2c_client *client,
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/* ----------------------------------------------------------------------- */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
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static unsigned short normal_i2c[] = { 0x88 >> 1, I2C_CLIENT_END };
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static unsigned short ignore = I2C_CLIENT_END;
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I2C_CLIENT_INSMOD;
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static struct i2c_client_address_data addr_data = {
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.normal_i2c = normal_i2c,
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.probe = &ignore,
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.ignore = &ignore,
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};
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static struct i2c_driver i2c_driver_saa7185;
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static int
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saa7185_detect_client (struct i2c_adapter *adapter,
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int address,
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int kind)
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static int saa7185_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int i;
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struct i2c_client *client;
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struct saa7185 *encoder;
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dprintk(1,
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KERN_INFO
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"saa7185.c: detecting saa7185 client on address 0x%x\n",
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address << 1);
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return 0;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -ENODEV;
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client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (!client)
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return -ENOMEM;
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client->addr = address;
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client->adapter = adapter;
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client->driver = &i2c_driver_saa7185;
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strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
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if (encoder == NULL) {
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kfree(client);
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if (encoder == NULL)
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return -ENOMEM;
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}
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encoder->norm = VIDEO_MODE_NTSC;
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encoder->enable = 1;
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i2c_set_clientdata(client, encoder);
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i = i2c_attach_client(client);
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if (i) {
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kfree(client);
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kfree(encoder);
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return i;
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}
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i = saa7185_write_block(client, init_common, sizeof(init_common));
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if (i >= 0) {
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i = saa7185_write_block(client, init_ntsc,
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sizeof(init_ntsc));
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}
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if (i < 0) {
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dprintk(1, KERN_ERR "%s_attach: init error %d\n",
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I2C_NAME(client), i);
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} else {
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dprintk(1,
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KERN_INFO
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"%s_attach: chip version %d at address 0x%x\n",
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I2C_NAME(client), saa7185_read(client) >> 5,
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client->addr << 1);
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}
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if (i >= 0)
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i = saa7185_write_block(client, init_ntsc, sizeof(init_ntsc));
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if (i < 0)
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v4l_dbg(1, debug, client, "init error %d\n", i);
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else
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v4l_dbg(1, debug, client, "revision 0x%x\n",
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saa7185_read(client) >> 5);
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return 0;
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}
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static int
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saa7185_attach_adapter (struct i2c_adapter *adapter)
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{
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dprintk(1,
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KERN_INFO
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"saa7185.c: starting probe for adapter %s (0x%x)\n",
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I2C_NAME(adapter), adapter->id);
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return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
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}
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static int
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saa7185_detach_client (struct i2c_client *client)
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static int saa7185_remove(struct i2c_client *client)
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{
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struct saa7185 *encoder = i2c_get_clientdata(client);
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int err;
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err = i2c_detach_client(client);
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if (err) {
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return err;
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}
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saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40); /* SW: output off is active */
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//saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
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kfree(encoder);
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kfree(client);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static struct i2c_driver i2c_driver_saa7185 = {
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.driver = {
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.name = "saa7185", /* name */
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},
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.id = I2C_DRIVERID_SAA7185B,
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.attach_adapter = saa7185_attach_adapter,
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.detach_client = saa7185_detach_client,
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.command = saa7185_command,
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static const struct i2c_device_id saa7185_id[] = {
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{ "saa7185", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, saa7185_id);
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static int __init
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saa7185_init (void)
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{
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return i2c_add_driver(&i2c_driver_saa7185);
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}
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static void __exit
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saa7185_exit (void)
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{
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i2c_del_driver(&i2c_driver_saa7185);
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}
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module_init(saa7185_init);
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module_exit(saa7185_exit);
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static struct v4l2_i2c_driver_data v4l2_i2c_data = {
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.name = "saa7185",
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.driverid = I2C_DRIVERID_SAA7185B,
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.command = saa7185_command,
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.probe = saa7185_probe,
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.remove = saa7185_remove,
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.id_table = saa7185_id,
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};
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