/*
* 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 <linux/byteorder/swab.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#define I2C_NAME(x) (x)->name
#include <linux/videodev.h>
#include <linux/video_decoder.h>
#define I2C_VPX3220 0x86
#define VPX3220_DEBUG KERN_DEBUG "vpx3220: "
static int debug = 0;
module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug level (0-1)");
#define dprintk(num, format, args...) \
do { \
if (debug >= num) \
printk(format, ##args); \
} while (0)
#define VPX_TIMEOUT_COUNT 10
/* ----------------------------------------------------------------------- */
struct vpx3220 {
unsigned char reg[255];
int norm;
int input;
int enable;
int bright;
int contrast;
int hue;
int sat;
};
static char *inputs[] = { "internal", "composite", "svideo" };
/* ----------------------------------------------------------------------- */
static inline int
vpx3220_write (struct i2c_client *client,
u8 reg,
u8 value)
{
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 i2c_client *client,
u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int
vpx3220_fp_status (struct i2c_client *client)
{
unsigned char status;
unsigned int i;
for (i = 0; i < VPX_TIMEOUT_COUNT; i++) {
status = vpx3220_read(client, 0x29);
if (!(status & 4))
return 0;
udelay(10);
if (need_resched())
cond_resched();
}
return -1;
}
static int
vpx3220_fp_write (struct i2c_client *client,
u8 fpaddr,
u16 data)
{
/* Write the 16-bit address to the FPWR register */
if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) {
dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
return -1;
}
if (vpx3220_fp_status(client) < 0)
return -1;
/* Write the 16-bit data to the FPDAT register */
if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) {
dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
return -1;
}
return 0;
}
static u16
vpx3220_fp_read (struct i2c_client *client,
u16 fpaddr)
{
s16 data;
/* Write the 16-bit address to the FPRD register */
if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) {
dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
return -1;
}
if (vpx3220_fp_status(client) < 0)
return -1;
/* Read the 16-bit data from the FPDAT register */
data = i2c_smbus_read_word_data(client, 0x28);
if (data == -1) {
dprintk(1, VPX3220_DEBUG "%s: failed\n", __func__);
return -1;
}
return swab16(data);
}
static int
vpx3220_write_block (struct i2c_client *client,
const u8 *data,
unsigned int len)
{
u8 reg;
int ret = -1;
while (len >= 2) {
reg = *data++;
if ((ret =
vpx3220_write(client, reg, *data++)) < 0)
break;
len -= 2;
}
return ret;
}
static int
vpx3220_write_fp_block (struct i2c_client *client,
const u16 *data,
unsigned int len)
{
u8 reg;
int ret = 0;
while (len > 1) {
reg = *data++;
ret |= vpx3220_fp_write(client, 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 void
vpx3220_dump_i2c (struct i2c_client *client)
{
int len = sizeof(init_common);
const unsigned char *data = init_common;
while (len > 1) {
dprintk(1,
KERN_DEBUG "vpx3216b i2c reg 0x%02x data 0x%02x\n",
*data, vpx3220_read(client, *data));
data += 2;
len -= 2;
}
}
static int
vpx3220_command (struct i2c_client *client,
unsigned int cmd,
void *arg)
{
struct vpx3220 *decoder = i2c_get_clientdata(client);
switch (cmd) {
case 0:
{
vpx3220_write_block(client, init_common,
sizeof(init_common));
vpx3220_write_fp_block(client, init_fp,
sizeof(init_fp) >> 1);
switch (decoder->norm) {
case VIDEO_MODE_NTSC:
vpx3220_write_fp_block(client, init_ntsc,
sizeof(init_ntsc) >> 1);
break;
case VIDEO_MODE_PAL:
vpx3220_write_fp_block(client, init_pal,
sizeof(init_pal) >> 1);
break;
case VIDEO_MODE_SECAM:
vpx3220_write_fp_block(client, init_secam,
sizeof(init_secam) >> 1);
break;
default:
vpx3220_write_fp_block(client, init_pal,
sizeof(init_pal) >> 1);
break;
}
}
break;
case DECODER_DUMP:
{
vpx3220_dump_i2c(client);
}
break;
case DECODER_GET_CAPABILITIES:
{
struct video_decoder_capability *cap = arg;
dprintk(1, KERN_DEBUG "%s: DECODER_GET_CAPABILITIES\n",
I2C_NAME(client));
cap->flags = VIDEO_DECODER_PAL |
VIDEO_DECODER_NTSC |
VIDEO_DECODER_SECAM |
VIDEO_DECODER_AUTO |
VIDEO_DECODER_CCIR;
cap->inputs = 3;
cap->outputs = 1;
}
break;
case DECODER_GET_STATUS:
{
int res = 0, status;
dprintk(1, KERN_INFO "%s: DECODER_GET_STATUS\n",
I2C_NAME(client));
status = vpx3220_fp_read(client, 0x0f3);
dprintk(1, KERN_INFO "%s: status: 0x%04x\n", I2C_NAME(client),
status);
if (status < 0)
return status;
if ((status & 0x20) == 0) {
res |= DECODER_STATUS_GOOD | DECODER_STATUS_COLOR;
switch (status & 0x18) {
case 0x00:
case 0x10:
case 0x14:
case 0x18:
res |= DECODER_STATUS_PAL;
break;
case 0x08:
res |= DECODER_STATUS_SECAM;
break;
case 0x04:
case 0x0c:
case 0x1c:
res |= DECODER_STATUS_NTSC;
break;
}
}
*(int *) arg = res;
}
break;
case DECODER_SET_NORM:
{
int *iarg = arg, data;
int temp_input;
/* Here we back up the input selection because it gets
overwritten when we fill the registers with the
choosen video norm */
temp_input = vpx3220_fp_read(client, 0xf2);
dprintk(1, KERN_DEBUG "%s: DECODER_SET_NORM %d\n",
I2C_NAME(client), *iarg);
switch (*iarg) {
case VIDEO_MODE_NTSC:
vpx3220_write_fp_block(client, init_ntsc,
sizeof(init_ntsc) >> 1);
dprintk(1, KERN_INFO "%s: norm switched to NTSC\n",
I2C_NAME(client));
break;
case VIDEO_MODE_PAL:
vpx3220_write_fp_block(client, init_pal,
sizeof(init_pal) >> 1);
dprintk(1, KERN_INFO "%s: norm switched to PAL\n",
I2C_NAME(client));
break;
case VIDEO_MODE_SECAM:
vpx3220_write_fp_block(client, init_secam,
sizeof(init_secam) >> 1);
dprintk(1, KERN_INFO "%s: norm switched to SECAM\n",
I2C_NAME(client));
break;
case VIDEO_MODE_AUTO:
/* FIXME This is only preliminary support */
data = vpx3220_fp_read(client, 0xf2) & 0x20;
vpx3220_fp_write(client, 0xf2, 0x00c0 | data);
dprintk(1, KERN_INFO "%s: norm switched to Auto\n",
I2C_NAME(client));
break;
default:
return -EINVAL;
}
decoder->norm = *iarg;
/* And here we set the backed up video input again */
vpx3220_fp_write(client, 0xf2, temp_input | 0x0010);
udelay(10);
}
break;
case DECODER_SET_INPUT:
{
int *iarg = arg, data;
/* RJ: *iarg = 0: ST8 (PCTV) input
*iarg = 1: COMPOSITE input
*iarg = 2: SVHS input */
const int input[3][2] = {
{0x0c, 0},
{0x0d, 0},
{0x0e, 1}
};
if (*iarg < 0 || *iarg > 2)
return -EINVAL;
dprintk(1, KERN_INFO "%s: input switched to %s\n",
I2C_NAME(client), inputs[*iarg]);
vpx3220_write(client, 0x33, input[*iarg][0]);
data = vpx3220_fp_read(client, 0xf2) & ~(0x0020);
if (data < 0)
return data;
/* 0x0010 is required to latch the setting */
vpx3220_fp_write(client, 0xf2,
data | (input[*iarg][1] << 5) | 0x0010);
udelay(10);
}
break;
case DECODER_SET_OUTPUT:
{
int *iarg = arg;
/* not much choice of outputs */
if (*iarg != 0) {
return -EINVAL;
}
}
break;
case DECODER_ENABLE_OUTPUT:
{
int *iarg = arg;
dprintk(1, KERN_DEBUG "%s: DECODER_ENABLE_OUTPUT %d\n",
I2C_NAME(client), *iarg);
vpx3220_write(client, 0xf2, (*iarg ? 0x1b : 0x00));
}
break;
case DECODER_SET_PICTURE:
{
struct video_picture *pic = arg;
if (decoder->bright != pic->brightness) {
/* We want -128 to 128 we get 0-65535 */
decoder->bright = pic->brightness;
vpx3220_write(client, 0xe6,
(decoder->bright - 32768) >> 8);
}
if (decoder->contrast != pic->contrast) {
/* We want 0 to 64 we get 0-65535 */
/* Bit 7 and 8 is for noise shaping */
decoder->contrast = pic->contrast;
vpx3220_write(client, 0xe7,
(decoder->contrast >> 10) + 192);
}
if (decoder->sat != pic->colour) {
/* We want 0 to 4096 we get 0-65535 */
decoder->sat = pic->colour;
vpx3220_fp_write(client, 0xa0,
decoder->sat >> 4);
}
if (decoder->hue != pic->hue) {
/* We want -512 to 512 we get 0-65535 */
decoder->hue = pic->hue;
vpx3220_fp_write(client, 0x1c,
((decoder->hue - 32768) >> 6) & 0xFFF);
}
}
break;
default:
return -EINVAL;
}
return 0;
}
static int
vpx3220_init_client (struct i2c_client *client)
{
vpx3220_write_block(client, init_common, sizeof(init_common));
vpx3220_write_fp_block(client, init_fp, sizeof(init_fp) >> 1);
/* Default to PAL */
vpx3220_write_fp_block(client, init_pal, sizeof(init_pal) >> 1);
return 0;
}
/* -----------------------------------------------------------------------
* Client managment code
*/
/*
* Generic i2c probe
* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
*/
static unsigned short normal_i2c[] =
{ I2C_VPX3220 >> 1, (I2C_VPX3220 >> 1) + 4,
I2C_CLIENT_END
};
static unsigned short ignore = I2C_CLIENT_END;
static struct i2c_client_address_data addr_data = {
.normal_i2c = normal_i2c,
.probe = &ignore,
.ignore = &ignore,
};
static struct i2c_driver vpx3220_i2c_driver;
static int
vpx3220_detach_client (struct i2c_client *client)
{
struct vpx3220 *decoder = i2c_get_clientdata(client);
int err;
err = i2c_detach_client(client);
if (err) {
return err;
}
kfree(decoder);
kfree(client);
return 0;
}
static int
vpx3220_detect_client (struct i2c_adapter *adapter,
int address,
int kind)
{
int err;
struct i2c_client *client;
struct vpx3220 *decoder;
dprintk(1, VPX3220_DEBUG "%s\n", __func__);
/* Check if the adapter supports the needed features */
if (!i2c_check_functionality
(adapter, I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
return 0;
client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == NULL) {
return -ENOMEM;
}
client->addr = address;
client->adapter = adapter;
client->driver = &vpx3220_i2c_driver;
/* Check for manufacture ID and part number */
if (kind < 0) {
u8 id;
u16 pn;
id = vpx3220_read(client, 0x00);
if (id != 0xec) {
dprintk(1,
KERN_INFO
"vpx3220_attach: Wrong manufacturer ID (0x%02x)\n",
id);
kfree(client);
return 0;
}
pn = (vpx3220_read(client, 0x02) << 8) +
vpx3220_read(client, 0x01);
switch (pn) {
case 0x4680:
strlcpy(I2C_NAME(client), "vpx3220a",
sizeof(I2C_NAME(client)));
break;
case 0x4260:
strlcpy(I2C_NAME(client), "vpx3216b",
sizeof(I2C_NAME(client)));
break;
case 0x4280:
strlcpy(I2C_NAME(client), "vpx3214c",
sizeof(I2C_NAME(client)));
break;
default:
dprintk(1,
KERN_INFO
"%s: Wrong part number (0x%04x)\n",
__func__, pn);
kfree(client);
return 0;
}
} else {
strlcpy(I2C_NAME(client), "forced vpx32xx",
sizeof(I2C_NAME(client)));
}
decoder = kzalloc(sizeof(struct vpx3220), GFP_KERNEL);
if (decoder == NULL) {
kfree(client);
return -ENOMEM;
}
decoder->norm = VIDEO_MODE_PAL;
decoder->input = 0;
decoder->enable = 1;
decoder->bright = 32768;
decoder->contrast = 32768;
decoder->hue = 32768;
decoder->sat = 32768;
i2c_set_clientdata(client, decoder);
err = i2c_attach_client(client);
if (err) {
kfree(client);
kfree(decoder);
return err;
}
dprintk(1, KERN_INFO "%s: vpx32xx client found at address 0x%02x\n",
I2C_NAME(client), client->addr << 1);
vpx3220_init_client(client);
return 0;
}
static int
vpx3220_attach_adapter (struct i2c_adapter *adapter)
{
int ret;
ret = i2c_probe(adapter, &addr_data, &vpx3220_detect_client);
dprintk(1, VPX3220_DEBUG "%s: i2c_probe returned %d\n",
__func__, ret);
return ret;
}
/* -----------------------------------------------------------------------
* Driver initialization and cleanup code
*/
static struct i2c_driver vpx3220_i2c_driver = {
.driver = {
.name = "vpx3220",
},
.id = I2C_DRIVERID_VPX3220,
.attach_adapter = vpx3220_attach_adapter,
.detach_client = vpx3220_detach_client,
.command = vpx3220_command,
};
static int __init
vpx3220_init (void)
{
return i2c_add_driver(&vpx3220_i2c_driver);
}
static void __exit
vpx3220_cleanup (void)
{
i2c_del_driver(&vpx3220_i2c_driver);
}
module_init(vpx3220_init);
module_exit(vpx3220_cleanup);
MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video encoder driver");
MODULE_AUTHOR("Laurent Pinchart");
MODULE_LICENSE("GPL");
