- 根目录:
- drivers
- media
- i2c
- vpx3220.c
/*
* vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1
*
* Copyright (C) 2001 Laurent Pinchart <lpinchart@freegates.be>
*
* 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/init.h>
#include <linux/delay.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver");
MODULE_AUTHOR("Laurent Pinchart");
MODULE_LICENSE("GPL");
static int debug;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define VPX_TIMEOUT_COUNT 10
/* ----------------------------------------------------------------------- */
struct vpx3220 {
struct v4l2_subdev sd;
struct v4l2_ctrl_handler hdl;
unsigned char reg[255];
v4l2_std_id norm;
int input;
int enable;
};
static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd)
{
return container_of(sd, struct vpx3220, sd);
}
static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
{
return &container_of(ctrl->handler, struct vpx3220, hdl)->sd;
}
static char *inputs[] = { "internal", "composite", "svideo" };
/* ----------------------------------------------------------------------- */
static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct vpx3220 *decoder = i2c_get_clientdata(client);
decoder->reg[reg] = value;
return i2c_smbus_write_byte_data(client, reg, value);
}
static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
return i2c_smbus_read_byte_data(client, reg);
}
static int vpx3220_fp_status(struct v4l2_subdev *sd)
{
unsigned char status;
unsigned int i;
for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
status = vpx3220_read(sd, 0x29);
if (!(status & 4))
return 0;
udelay(10);
if (need_resched())
cond_resched();
}
return -1;
}
static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
/* Write the 16-bit address to the FPWR register */
if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
return -1;
}
if (vpx3220_fp_status(sd) < 0)
return -1;
/* Write the 16-bit data to the FPDAT register */
if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
return -1;
}
return 0;
}
static u16 vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr)
{
struct i2c_client *client = v4l2_get_subdevdata(sd);
s16 data;
/* Write the 16-bit address to the FPRD register */
if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
return -1;
}
if (vpx3220_fp_status(sd) < 0)
return -1;
/* Read the 16-bit data from the FPDAT register */
data = i2c_smbus_read_word_data(client, 0x28);
if (data == -1) {
v4l2_dbg(1, debug, sd, "%s: failed\n", __func__);
return -1;
}
return swab16(data);
}
static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
{
u8 reg;
int ret = -1;
while (len >= 2) {
reg = *data++;
ret = vpx3220_write(sd, reg, *data++);
if (ret < 0)
break;
len -= 2;
}
return ret;
}
static int vpx3220_write_fp_block(struct v4l2_subdev *sd,
const u16 *data, unsigned int len)
{
u8 reg;
int ret = 0;
while (len > 1) {
reg = *data++;
ret |= vpx3220_fp_write(sd, reg, *data++);
len -= 2;
}
return ret;
}
/* ---------------------------------------------------------------------- */
static const unsigned short init_ntsc[] = {
0x1c, 0x00, /* NTSC tint angle */
0x88, 17, /* Window 1 vertical */
0x89, 240, /* Vertical lines in */
0x8a, 240, /* Vertical lines out */
0x8b, 000, /* Horizontal begin */
0x8c, 640, /* Horizontal length */
0x8d, 640, /* Number of pixels */
0x8f, 0xc00, /* Disable window 2 */
0xf0, 0x73, /* 13.5 MHz transport, Forced
* mode, latch windows */
0xf2, 0x13, /* NTSC M, composite input */
0xe7, 0x1e1, /* Enable vertical standard
* locking @ 240 lines */
};
static const unsigned short init_pal[] = {
0x88, 23, /* Window 1 vertical begin */
0x89, 288, /* Vertical lines in (16 lines
* skipped by the VFE) */
0x8a, 288, /* Vertical lines out (16 lines
* skipped by the VFE) */
0x8b, 16, /* Horizontal begin */
0x8c, 768, /* Horizontal length */
0x8d, 784, /* Number of pixels
* Must be >= Horizontal begin + Horizontal length */
0x8f, 0xc00, /* Disable window 2 */
0xf0, 0x77, /* 13.5 MHz transport, Forced
* mode, latch windows */
0xf2, 0x3d1, /* PAL B,G,H,I, composite input */
0xe7, 0x241, /* PAL/SECAM set to 288 lines */
};
static const unsigned short init_secam[] = {
0x88, 23, /* Window 1 vertical begin */
0x89, 288, /* Vertical lines in (16 lines
* skipped by the VFE) */
0x8a, 288, /* Vertical lines out (16 lines
* skipped by the VFE) */
0x8b, 16, /* Horizontal begin */
0x8c, 768, /* Horizontal length */
0x8d, 784, /* Number of pixels
* Must be >= Horizontal begin + Horizontal length */
0x8f, 0xc00, /* Disable window 2 */
0xf0, 0x77, /* 13.5 MHz transport, Forced
* mode, latch windows */
0xf2, 0x3d5, /* SECAM, composite input */
0xe7, 0x241, /* PAL/SECAM set to 288 lines */
};
static const unsigned char init_common[] = {
0xf2, 0x00, /* Disable all outputs */
0x33, 0x0d, /* Luma : VIN2, Chroma : CIN
* (clamp off) */
0xd8, 0xa8, /* HREF/VREF active high, VREF
* pulse = 2, Odd/Even flag */
0x20, 0x03, /* IF compensation 0dB/oct */
0xe0, 0xff, /* Open up all comparators */
0xe1, 0x00,
0xe2, 0x7f,
0xe3, 0x80,
0xe4, 0x7f,
0xe5, 0x80,
0xe6, 0x00, /* Brightness set to 0 */
0xe7, 0xe0, /* Contrast to 1.0, noise shaping
* 10 to 8 2-bit error diffusion */
0xe8, 0xf8, /* YUV422, CbCr binary offset,
* ... (p.32) */
0xea, 0x18, /* LLC2 connected, output FIFO
* reset with VACTintern */
0xf0, 0x8a, /* Half full level to 10, bus
* shuffler [7:0, 23:16, 15:8] */
0xf1, 0x18, /* Single clock, sync mode, no
* FE delay, no HLEN counter */
0xf8, 0x12, /* Port A, PIXCLK, HF# & FE#
* strength to 2 */
0xf9, 0x24, /* Port B, HREF, VREF, PREF &
* ALPHA strength to 4 */
};
static const unsigned short init_fp[] = {
0x59, 0,
0xa0, 2070, /* ACC reference */
0xa3, 0,
0xa4, 0,
0xa8, 30,
0xb2, 768,
0xbe, 27,
0x58, 0,
0x26, 0,
0x4b, 0x298, /* PLL gain */
};
static int vpx3220_init(struct v4l2_subdev *sd, u32 val)
{
struct vpx3220 *decoder = to_vpx3220(sd);
vpx3220_write_block(sd, init_common, sizeof(init_common));
vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
if (decoder->norm & V4L2_STD_NTSC)
vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
else if (decoder->norm & V4L2_STD_PAL)
vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
else if (decoder->norm & V4L2_STD_SECAM)
vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
else
vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
return 0;
}
static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd)
{
int res = V4L2_IN_ST_NO_SIGNAL, status;
v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL;
status = vpx3220_fp_read(sd, 0x0f3);
v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status);
if (status < 0)
return status;
if ((status & 0x20) == 0) {
res = 0;
switch (status & 0x18) {
case 0x00:
case 0x10:
case 0x14:
case 0x18:
std &= V4L2_STD_PAL;
break;
case 0x08:
std &= V4L2_STD_SECAM;
break;
case 0x04:
case 0x0c:
case 0x1c:
std &= V4L2_STD_NTSC;
break;
}
} else {
std = V4L2_STD_UNKNOWN;
}
if (pstd)
*pstd = std;
if (pstatus)
*pstatus = res;
return 0;
}
static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
{
v4l2_dbg(1, debug, sd, "querystd\n");
return vpx3220_status(sd, NULL, std);
}
static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status)
{
v4l2_dbg(1, debug, sd, "g_input_status\n");
return vpx3220_status(sd, status, NULL);
}
static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
{
struct vpx3220 *decoder = to_vpx3220(sd);
int temp_input;
/* Here we back up the input selection because it gets
overwritten when we fill the registers with the
chosen video norm */
temp_input = vpx3220_fp_read(sd, 0xf2);
v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std);
if (std & V4L2_STD_NTSC) {
vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1);
v4l2_dbg(1, debug, sd, "norm switched to NTSC\n");
} else if (std & V4L2_STD_PAL) {
vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
v4l2_dbg(1, debug, sd, "norm switched to PAL\n");
} else if (std & V4L2_STD_SECAM) {
vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1);
v4l2_dbg(1, debug, sd, "norm switched to SECAM\n");
} else {
return -EINVAL;
}
decoder->norm = std;
/* And here we set the backed up video input again */
vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010);
udelay(10);
return 0;
}
static int vpx3220_s_routing(struct v4l2_subdev *sd,
u32 input, u32 output, u32 config)
{
int data;
/* RJ: input = 0: ST8 (PCTV) input
input = 1: COMPOSITE input
input = 2: SVHS input */
const int input_vals[3][2] = {
{0x0c, 0},
{0x0d, 0},
{0x0e, 1}
};
if (input > 2)
return -EINVAL;
v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]);
vpx3220_write(sd, 0x33, input_vals[input][0]);
data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020);
if (data < 0)
return data;
/* 0x0010 is required to latch the setting */
vpx3220_fp_write(sd, 0xf2,
data | (input_vals[input][1] << 5) | 0x0010);
udelay(10);
return 0;
}
static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable)
{
v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off");
vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00));
return 0;
}
static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct v4l2_subdev *sd = to_sd(ctrl);
switch (ctrl->id) {
case V4L2_CID_BRIGHTNESS:
vpx3220_write(sd, 0xe6, ctrl->val);
return 0;
case V4L2_CID_CONTRAST:
/* Bit 7 and 8 is for noise shaping */
vpx3220_write(sd, 0xe7, ctrl->val + 192);
return 0;
case V4L2_CID_SATURATION:
vpx3220_fp_write(sd, 0xa0, ctrl->val);
return 0;
case V4L2_CID_HUE:
vpx3220_fp_write(sd, 0x1c, ctrl->val);
return 0;
}
return -EINVAL;
}
/* ----------------------------------------------------------------------- */
static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = {
.s_ctrl = vpx3220_s_ctrl,
};
static const struct v4l2_subdev_core_ops vpx3220_core_ops = {
.init = vpx3220_init,
.g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
.try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
.s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
.g_ctrl = v4l2_subdev_g_ctrl,
.s_ctrl = v4l2_subdev_s_ctrl,
.queryctrl = v4l2_subdev_queryctrl,
.querymenu = v4l2_subdev_querymenu,
.s_std = vpx3220_s_std,
};
static const struct v4l2_subdev_video_ops vpx3220_video_ops = {
.s_routing = vpx3220_s_routing,
.s_stream = vpx3220_s_stream,
.querystd = vpx3220_querystd,
.g_input_status = vpx3220_g_input_status,
};
static const struct v4l2_subdev_ops vpx3220_ops = {
.core = &vpx3220_core_ops,
.video = &vpx3220_video_ops,
};
/* -----------------------------------------------------------------------
* Client management code
*/
static int vpx3220_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct vpx3220 *decoder;
struct v4l2_subdev *sd;
const char *name = NULL;
u8 ver;
u16 pn;
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL);
if (decoder == NULL)
return -ENOMEM;
sd = &decoder->sd;
v4l2_i2c_subdev_init(sd, client, &vpx3220_ops);
decoder->norm = V4L2_STD_PAL;
decoder->input = 0;
decoder->enable = 1;
v4l2_ctrl_handler_init(&decoder->hdl, 4);
v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
V4L2_CID_CONTRAST, 0, 63, 1, 32);
v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
V4L2_CID_SATURATION, 0, 4095, 1, 2048);
v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops,
V4L2_CID_HUE, -512, 511, 1, 0);
sd->ctrl_handler = &decoder->hdl;
if (decoder->hdl.error) {
int err = decoder->hdl.error;
v4l2_ctrl_handler_free(&decoder->hdl);
return err;
}
v4l2_ctrl_handler_setup(&decoder->hdl);
ver = i2c_smbus_read_byte_data(client, 0x00);
pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) +
i2c_smbus_read_byte_data(client, 0x01);
if (ver == 0xec) {
switch (pn) {
case 0x4680:
name = "vpx3220a";
break;
case 0x4260:
name = "vpx3216b";
break;
case 0x4280:
name = "vpx3214c";
break;
}
}
if (name)
v4l2_info(sd, "%s found @ 0x%x (%s)\n", name,
client->addr << 1, client->adapter->name);
else
v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n",
ver, pn, client->addr << 1, client->adapter->name);
vpx3220_write_block(sd, init_common, sizeof(init_common));
vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1);
/* Default to PAL */
vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1);
return 0;
}
static int vpx3220_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct vpx3220 *decoder = to_vpx3220(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&decoder->hdl);
return 0;
}
static const struct i2c_device_id vpx3220_id[] = {
{ "vpx3220a", 0 },
{ "vpx3216b", 0 },
{ "vpx3214c", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, vpx3220_id);
static struct i2c_driver vpx3220_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "vpx3220",
},
.probe = vpx3220_probe,
.remove = vpx3220_remove,
.id_table = vpx3220_id,
};
module_i2c_driver(vpx3220_driver);