/*
* Copyright (C) 2005-2006 Micronas USA Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (Version 2) as
* published by the Free Software Foundation.
*
* 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., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/unistd.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/firmware.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <linux/videodev2.h>
#include <media/tuner.h>
#include <media/v4l2-common.h>
#include "go7007-priv.h"
/*
* Wait for an interrupt to be delivered from the GO7007SB and return
* the associated value and data.
*
* Must be called with the hw_lock held.
*/
int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
{
go->interrupt_available = 0;
go->hpi_ops->read_interrupt(go);
if (wait_event_timeout(go->interrupt_waitq,
go->interrupt_available, 5*HZ) < 0) {
v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
return -1;
}
if (!go->interrupt_available)
return -1;
go->interrupt_available = 0;
*value = go->interrupt_value & 0xfffe;
*data = go->interrupt_data;
return 0;
}
EXPORT_SYMBOL(go7007_read_interrupt);
/*
* Read a register/address on the GO7007SB.
*
* Must be called with the hw_lock held.
*/
int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
{
int count = 100;
u16 value;
if (go7007_write_interrupt(go, 0x0010, addr) < 0)
return -EIO;
while (count-- > 0) {
if (go7007_read_interrupt(go, &value, data) == 0 &&
value == 0xa000)
return 0;
}
return -EIO;
}
EXPORT_SYMBOL(go7007_read_addr);
/*
* Send the boot firmware to the encoder, which just wakes it up and lets
* us talk to the GPIO pins and on-board I2C adapter.
*
* Must be called with the hw_lock held.
*/
static int go7007_load_encoder(struct go7007 *go)
{
const struct firmware *fw_entry;
char fw_name[] = "go7007/go7007fw.bin";
void *bounce;
int fw_len, rv = 0;
u16 intr_val, intr_data;
if (go->boot_fw == NULL) {
if (request_firmware(&fw_entry, fw_name, go->dev)) {
v4l2_err(go, "unable to load firmware from file \"%s\"\n", fw_name);
return -1;
}
if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
v4l2_err(go, "file \"%s\" does not appear to be go7007 firmware\n", fw_name);
release_firmware(fw_entry);
return -1;
}
fw_len = fw_entry->size - 16;
bounce = kmemdup(fw_entry->data + 16, fw_len, GFP_KERNEL);
if (bounce == NULL) {
v4l2_err(go, "unable to allocate %d bytes for firmware transfer\n", fw_len);
release_firmware(fw_entry);
return -1;
}
release_firmware(fw_entry);
go->boot_fw_len = fw_len;
go->boot_fw = bounce;
}
if (go7007_interface_reset(go) < 0 ||
go7007_send_firmware(go, go->boot_fw, go->boot_fw_len) < 0 ||
go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
(intr_val & ~0x1) != 0x5a5a) {
v4l2_err(go, "error transferring firmware\n");
rv = -1;
}
return rv;
}
MODULE_FIRMWARE("go7007/go7007fw.bin");
/*
* Boot the encoder and register the I2C adapter if requested. Do the
* minimum initialization necessary, since the board-specific code may
* still need to probe the board ID.
*
* Must NOT be called with the hw_lock held.
*/
int go7007_boot_encoder(struct go7007 *go, int init_i2c)
{
int ret;
mutex_lock(&go->hw_lock);
ret = go7007_load_encoder(go);
mutex_unlock(&go->hw_lock);
if (ret < 0)
return -1;
if (!init_i2c)
return 0;
if (go7007_i2c_init(go) < 0)
return -1;
go->i2c_adapter_online = 1;
return 0;
}
EXPORT_SYMBOL(go7007_boot_encoder);
/*
* Configure any hardware-related registers in the GO7007, such as GPIO
* pins and bus parameters, which are board-specific. This assumes
* the boot firmware has already been downloaded.
*
* Must be called with the hw_lock held.
*/
static int go7007_init_encoder(struct go7007 *go)
{
if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
go7007_write_addr(go, 0x1000, 0x0811);
go7007_write_addr(go, 0x1000, 0x0c11);
}
switch (go->board_id) {
case GO7007_BOARDID_MATRIX_REV:
/* Set GPIO pin 0 to be an output (audio clock control) */
go7007_write_addr(go, 0x3c82, 0x0001);
go7007_write_addr(go, 0x3c80, 0x00fe);
break;
case GO7007_BOARDID_ADLINK_MPG24:
/* set GPIO5 to be an output, currently low */
go7007_write_addr(go, 0x3c82, 0x0000);
go7007_write_addr(go, 0x3c80, 0x00df);
break;
case GO7007_BOARDID_ADS_USBAV_709:
/* GPIO pin 0: audio clock control */
/* pin 2: TW9906 reset */
/* pin 3: capture LED */
go7007_write_addr(go, 0x3c82, 0x000d);
go7007_write_addr(go, 0x3c80, 0x00f2);
break;
}
return 0;
}
/*
* Send the boot firmware to the GO7007 and configure the registers. This
* is the only way to stop the encoder once it has started streaming video.
*
* Must be called with the hw_lock held.
*/
int go7007_reset_encoder(struct go7007 *go)
{
if (go7007_load_encoder(go) < 0)
return -1;
return go7007_init_encoder(go);
}
/*
* Attempt to instantiate an I2C client by ID, probably loading a module.
*/
static int init_i2c_module(struct i2c_adapter *adapter, const struct go_i2c *const i2c)
{
struct go7007 *go = i2c_get_adapdata(adapter);
struct v4l2_device *v4l2_dev = &go->v4l2_dev;
struct v4l2_subdev *sd;
struct i2c_board_info info;
memset(&info, 0, sizeof(info));
strlcpy(info.type, i2c->type, sizeof(info.type));
info.addr = i2c->addr;
info.flags = i2c->flags;
sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, NULL);
if (sd) {
if (i2c->is_video)
go->sd_video = sd;
if (i2c->is_audio)
go->sd_audio = sd;
return 0;
}
printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", i2c->type);
return -EINVAL;
}
/*
* Detach and unregister the encoder. The go7007 struct won't be freed
* until v4l2 finishes releasing its resources and all associated fds are
* closed by applications.
*/
static void go7007_remove(struct v4l2_device *v4l2_dev)
{
struct go7007 *go = container_of(v4l2_dev, struct go7007, v4l2_dev);
v4l2_device_unregister(v4l2_dev);
if (go->hpi_ops->release)
go->hpi_ops->release(go);
if (go->i2c_adapter_online) {
i2c_del_adapter(&go->i2c_adapter);
go->i2c_adapter_online = 0;
}
kfree(go->boot_fw);
go7007_v4l2_remove(go);
kfree(go);
}
/*
* Finalize the GO7007 hardware setup, register the on-board I2C adapter
* (if used on this board), load the I2C client driver for the sensor
* (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
* interfaces.
*
* Must NOT be called with the hw_lock held.
*/
int go7007_register_encoder(struct go7007 *go, unsigned num_i2c_devs)
{
int i, ret;
dev_info(go->dev, "go7007: registering new %s\n", go->name);
go->v4l2_dev.release = go7007_remove;
ret = v4l2_device_register(go->dev, &go->v4l2_dev);
if (ret < 0)
return ret;
mutex_lock(&go->hw_lock);
ret = go7007_init_encoder(go);
mutex_unlock(&go->hw_lock);
if (ret < 0)
return ret;
ret = go7007_v4l2_ctrl_init(go);
if (ret < 0)
return ret;
if (!go->i2c_adapter_online &&
go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
ret = go7007_i2c_init(go);
if (ret < 0)
return ret;
go->i2c_adapter_online = 1;
}
if (go->i2c_adapter_online) {
if (go->board_id == GO7007_BOARDID_ADS_USBAV_709) {
/* Reset the TW9906 */
go7007_write_addr(go, 0x3c82, 0x0009);
msleep(50);
go7007_write_addr(go, 0x3c82, 0x000d);
}
for (i = 0; i < num_i2c_devs; ++i)
init_i2c_module(&go->i2c_adapter, &go->board_info->i2c_devs[i]);
if (go->tuner_type >= 0) {
struct tuner_setup setup = {
.addr = ADDR_UNSET,
.type = go->tuner_type,
.mode_mask = T_ANALOG_TV,
};
v4l2_device_call_all(&go->v4l2_dev, 0, tuner,
s_type_addr, &setup);
}
if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
v4l2_subdev_call(go->sd_video, video, s_routing,
0, 0, go->channel_number + 1);
}
ret = go7007_v4l2_init(go);
if (ret < 0)
return ret;
if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
go->audio_enabled = 1;
go7007_snd_init(go);
}
return 0;
}
EXPORT_SYMBOL(go7007_register_encoder);
/*
* Send the encode firmware to the encoder, which will cause it
* to immediately start delivering the video and audio streams.
*
* Must be called with the hw_lock held.
*/
int go7007_start_encoder(struct go7007 *go)
{
u8 *fw;
int fw_len, rv = 0, i;
u16 intr_val, intr_data;
go->modet_enable = 0;
if (!go->dvd_mode)
for (i = 0; i < 4; ++i) {
if (go->modet[i].enable) {
go->modet_enable = 1;
continue;
}
go->modet[i].pixel_threshold = 32767;
go->modet[i].motion_threshold = 32767;
go->modet[i].mb_threshold = 32767;
}
if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
return -1;
if (go7007_send_firmware(go, fw, fw_len) < 0 ||
go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
rv = -1;
goto start_error;
}
go->state = STATE_DATA;
go->parse_length = 0;
go->seen_frame = 0;
if (go7007_stream_start(go) < 0) {
v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
rv = -1;
goto start_error;
}
start_error:
kfree(fw);
return rv;
}
/*
* Store a byte in the current video buffer, if there is one.
*/
static inline void store_byte(struct go7007_buffer *vb, u8 byte)
{
if (vb && vb->vb.v4l2_planes[0].bytesused < GO7007_BUF_SIZE) {
u8 *ptr = vb2_plane_vaddr(&vb->vb, 0);
ptr[vb->vb.v4l2_planes[0].bytesused++] = byte;
}
}
/*
* Deliver the last video buffer and get a new one to start writing to.
*/
static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buffer *vb)
{
struct go7007_buffer *vb_tmp = NULL;
u32 *bytesused = &vb->vb.v4l2_planes[0].bytesused;
int i;
if (vb) {
if (vb->modet_active) {
if (*bytesused + 216 < GO7007_BUF_SIZE) {
for (i = 0; i < 216; ++i)
store_byte(vb, go->active_map[i]);
*bytesused -= 216;
} else
vb->modet_active = 0;
}
vb->vb.v4l2_buf.sequence = go->next_seq++;
v4l2_get_timestamp(&vb->vb.v4l2_buf.timestamp);
vb_tmp = vb;
spin_lock(&go->spinlock);
list_del(&vb->list);
if (list_empty(&go->vidq_active))
vb = NULL;
else
vb = list_first_entry(&go->vidq_active, struct go7007_buffer, list);
go->active_buf = vb;
spin_unlock(&go->spinlock);
vb2_buffer_done(&vb_tmp->vb, VB2_BUF_STATE_DONE);
return vb;
}
spin_lock(&go->spinlock);
if (!list_empty(&go->vidq_active))
vb = go->active_buf =
list_first_entry(&go->vidq_active, struct go7007_buffer, list);
spin_unlock(&go->spinlock);
go->next_seq++;
return vb;
}
static void write_bitmap_word(struct go7007 *go)
{
int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
for (i = 0; i < 16; ++i) {
y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
if (stride * y + (x >> 3) < sizeof(go->active_map))
go->active_map[stride * y + (x >> 3)] |=
(go->modet_word & 1) << (x & 0x7);
go->modet_word >>= 1;
}
}
/*
* Parse a chunk of the video stream into frames. The frames are not
* delimited by the hardware, so we have to parse the frame boundaries
* based on the type of video stream we're receiving.
*/
void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
{
struct go7007_buffer *vb = go->active_buf;
int i, seq_start_code = -1, gop_start_code = -1, frame_start_code = -1;
switch (go->format) {
case V4L2_PIX_FMT_MPEG4:
seq_start_code = 0xB0;
gop_start_code = 0xB3;
frame_start_code = 0xB6;
break;
case V4L2_PIX_FMT_MPEG1:
case V4L2_PIX_FMT_MPEG2:
seq_start_code = 0xB3;
gop_start_code = 0xB8;
frame_start_code = 0x00;
break;
}
for (i = 0; i < length; ++i) {
if (vb && vb->vb.v4l2_planes[0].bytesused >= GO7007_BUF_SIZE - 3) {
v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
vb->vb.v4l2_planes[0].bytesused = 0;
vb->frame_offset = 0;
vb->modet_active = 0;
vb = go->active_buf = NULL;
}
switch (go->state) {
case STATE_DATA:
switch (buf[i]) {
case 0x00:
go->state = STATE_00;
break;
case 0xFF:
go->state = STATE_FF;
break;
default:
store_byte(vb, buf[i]);
break;
}
break;
case STATE_00:
switch (buf[i]) {
case 0x00:
go->state = STATE_00_00;
break;
case 0xFF:
store_byte(vb, 0x00);
go->state = STATE_FF;
break;
default:
store_byte(vb, 0x00);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break;
}
break;
case STATE_00_00:
switch (buf[i]) {
case 0x00:
store_byte(vb, 0x00);
/* go->state remains STATE_00_00 */
break;
case 0x01:
go->state = STATE_00_00_01;
break;
case 0xFF:
store_byte(vb, 0x00);
store_byte(vb, 0x00);
go->state = STATE_FF;
break;
default:
store_byte(vb, 0x00);
store_byte(vb, 0x00);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break;
}
break;
case STATE_00_00_01:
if (buf[i] == 0xF8 && go->modet_enable == 0) {
/* MODET start code, but MODET not enabled */
store_byte(vb, 0x00);
store_byte(vb, 0x00);
store_byte(vb, 0x01);
store_byte(vb, 0xF8);
go->state = STATE_DATA;
break;
}
/* If this is the start of a new MPEG frame,
* get a new buffer */
if ((go->format == V4L2_PIX_FMT_MPEG1 ||
go->format == V4L2_PIX_FMT_MPEG2 ||
go->format == V4L2_PIX_FMT_MPEG4) &&
(buf[i] == seq_start_code ||
buf[i] == gop_start_code ||
buf[i] == frame_start_code)) {
if (vb == NULL || go->seen_frame)
vb = frame_boundary(go, vb);
go->seen_frame = buf[i] == frame_start_code;
if (vb && go->seen_frame)
vb->frame_offset = vb->vb.v4l2_planes[0].bytesused;
}
/* Handle any special chunk types, or just write the
* start code to the (potentially new) buffer */
switch (buf[i]) {
case 0xF5: /* timestamp */
go->parse_length = 12;
go->state = STATE_UNPARSED;
break;
case 0xF6: /* vbi */
go->state = STATE_VBI_LEN_A;
break;
case 0xF8: /* MD map */
go->parse_length = 0;
memset(go->active_map, 0,
sizeof(go->active_map));
go->state = STATE_MODET_MAP;
break;
case 0xFF: /* Potential JPEG start code */
store_byte(vb, 0x00);
store_byte(vb, 0x00);
store_byte(vb, 0x01);
go->state = STATE_FF;
break;
default:
store_byte(vb, 0x00);
store_byte(vb, 0x00);
store_byte(vb, 0x01);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break;
}
break;
case STATE_FF:
switch (buf[i]) {
case 0x00:
store_byte(vb, 0xFF);
go->state = STATE_00;
break;
case 0xFF:
store_byte(vb, 0xFF);
/* go->state remains STATE_FF */
break;
case 0xD8:
if (go->format == V4L2_PIX_FMT_MJPEG)
vb = frame_boundary(go, vb);
/* fall through */
default:
store_byte(vb, 0xFF);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break;
}
break;
case STATE_VBI_LEN_A:
go->parse_length = buf[i] << 8;
go->state = STATE_VBI_LEN_B;
break;
case STATE_VBI_LEN_B:
go->parse_length |= buf[i];
if (go->parse_length > 0)
go->state = STATE_UNPARSED;
else
go->state = STATE_DATA;
break;
case STATE_MODET_MAP:
if (go->parse_length < 204) {
if (go->parse_length & 1) {
go->modet_word |= buf[i];
write_bitmap_word(go);
} else
go->modet_word = buf[i] << 8;
} else if (go->parse_length == 207 && vb) {
vb->modet_active = buf[i];
}
if (++go->parse_length == 208)
go->state = STATE_DATA;
break;
case STATE_UNPARSED:
if (--go->parse_length == 0)
go->state = STATE_DATA;
break;
}
}
}
EXPORT_SYMBOL(go7007_parse_video_stream);
/*
* Allocate a new go7007 struct. Used by the hardware-specific probe.
*/
struct go7007 *go7007_alloc(const struct go7007_board_info *board,
struct device *dev)
{
struct go7007 *go;
int i;
go = kzalloc(sizeof(struct go7007), GFP_KERNEL);
if (go == NULL)
return NULL;
go->dev = dev;
go->board_info = board;
go->board_id = 0;
go->tuner_type = -1;
go->channel_number = 0;
go->name[0] = 0;
mutex_init(&go->hw_lock);
init_waitqueue_head(&go->frame_waitq);
spin_lock_init(&go->spinlock);
go->status = STATUS_INIT;
memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
go->i2c_adapter_online = 0;
go->interrupt_available = 0;
init_waitqueue_head(&go->interrupt_waitq);
go->input = 0;
go7007_update_board(go);
go->encoder_h_halve = 0;
go->encoder_v_halve = 0;
go->encoder_subsample = 0;
go->format = V4L2_PIX_FMT_MJPEG;
go->bitrate = 1500000;
go->fps_scale = 1;
go->pali = 0;
go->aspect_ratio = GO7007_RATIO_1_1;
go->gop_size = 0;
go->ipb = 0;
go->closed_gop = 0;
go->repeat_seqhead = 0;
go->seq_header_enable = 0;
go->gop_header_enable = 0;
go->dvd_mode = 0;
go->interlace_coding = 0;
for (i = 0; i < 4; ++i)
go->modet[i].enable = 0;
for (i = 0; i < 1624; ++i)
go->modet_map[i] = 0;
go->audio_deliver = NULL;
go->audio_enabled = 0;
return go;
}
EXPORT_SYMBOL(go7007_alloc);
void go7007_update_board(struct go7007 *go)
{
const struct go7007_board_info *board = go->board_info;
if (board->sensor_flags & GO7007_SENSOR_TV) {
go->standard = GO7007_STD_NTSC;
go->std = V4L2_STD_NTSC_M;
go->width = 720;
go->height = 480;
go->sensor_framerate = 30000;
} else {
go->standard = GO7007_STD_OTHER;
go->width = board->sensor_width;
go->height = board->sensor_height;
go->sensor_framerate = board->sensor_framerate;
}
go->encoder_v_offset = board->sensor_v_offset;
go->encoder_h_offset = board->sensor_h_offset;
}
EXPORT_SYMBOL(go7007_update_board);
MODULE_LICENSE("GPL v2");