// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright ( C ) 2005 - 2006 Micronas USA Inc .
*/
#include <linux/module.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 <media/v4l2-event.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 & 0 xfffe;
*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, 0 x0010, addr) < 0 )
return -EIO;
while (count-- > 0 ) {
if (go7007_read_interrupt(go, &value, data) == 0 &&
value == 0 xa000)
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;
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 & ~0 x1) != 0 x5a5a) {
v4l2_err(go, "error transferring firmware\n" );
kfree(go->boot_fw);
go->boot_fw = NULL;
return -1 ;
}
return 0 ;
}
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, 0 x1000, 0 x0811);
go7007_write_addr(go, 0 x1000, 0 x0c11);
}
switch (go->board_id) {
case GO7007_BOARDID_MATRIX_REV:
/* Set GPIO pin 0 to be an output (audio clock control) */
go7007_write_addr(go, 0 x3c82, 0 x0001);
go7007_write_addr(go, 0 x3c80, 0 x00fe);
break ;
case GO7007_BOARDID_ADLINK_MPG24:
/* set GPIO5 to be an output, currently low */
go7007_write_addr(go, 0 x3c82, 0 x0000);
go7007_write_addr(go, 0 x3c80, 0 x00df);
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, 0 x3c82, 0 x000d);
go7007_write_addr(go, 0 x3c80, 0 x00f2);
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));
strscpy(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 ;
}
pr_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, 0 x3c82, 0 x0009);
msleep(50 );
go7007_write_addr(go, 0 x3c82, 0 x000d);
}
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, x, y;
u16 intr_val, intr_data;
go->modet_enable = 0 ;
for (i = 0 ; i < 4 ; i++)
go->modet[i].enable = 0 ;
switch (v4l2_ctrl_g_ctrl(go->modet_mode)) {
case V4L2_DETECT_MD_MODE_GLOBAL:
memset(go->modet_map, 0 , sizeof (go->modet_map));
go->modet[0 ].enable = 1 ;
go->modet_enable = 1 ;
break ;
case V4L2_DETECT_MD_MODE_REGION_GRID:
for (y = 0 ; y < go->height / 16 ; y++) {
for (x = 0 ; x < go->width / 16 ; x++) {
int idx = y * go->width / 16 + x;
go->modet[go->modet_map[idx]].enable = 1 ;
}
}
go->modet_enable = 1 ;
break ;
}
if (go->dvd_mode)
go->modet_enable = 0 ;
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.vb2_buf.planes[0 ].bytesused < GO7007_BUF_SIZE) {
u8 *ptr = vb2_plane_vaddr(&vb->vb.vb2_buf, 0 );
ptr[vb->vb.vb2_buf.planes[0 ].bytesused++] = byte;
}
}
static void go7007_set_motion_regions(struct go7007 *go, struct go7007_buffer *vb,
u32 motion_regions)
{
if (motion_regions != go->modet_event_status) {
struct v4l2_event ev = {
.type = V4L2_EVENT_MOTION_DET,
.u.motion_det = {
.flags = V4L2_EVENT_MD_FL_HAVE_FRAME_SEQ,
.frame_sequence = vb->vb.sequence,
.region_mask = motion_regions,
},
};
v4l2_event_queue(&go->vdev, &ev);
go->modet_event_status = motion_regions;
}
}
/*
* Determine regions with motion and send a motion detection event
* in case of changes .
*/
static void go7007_motion_regions(struct go7007 *go, struct go7007_buffer *vb)
{
u32 *bytesused = &vb->vb.vb2_buf.planes[0 ].bytesused;
unsigned motion[4 ] = { 0 , 0 , 0 , 0 };
u32 motion_regions = 0 ;
unsigned stride = (go->width + 7 ) >> 3 ;
unsigned x, y;
int i;
for (i = 0 ; i < 216 ; ++i)
store_byte(vb, go->active_map[i]);
for (y = 0 ; y < go->height / 16 ; y++) {
for (x = 0 ; x < go->width / 16 ; x++) {
if (!(go->active_map[y * stride + (x >> 3 )] & (1 << (x & 7 ))))
continue ;
motion[go->modet_map[y * (go->width / 16 ) + x]]++;
}
}
motion_regions = ((motion[0 ] > 0 ) << 0 ) |
((motion[1 ] > 0 ) << 1 ) |
((motion[2 ] > 0 ) << 2 ) |
((motion[3 ] > 0 ) << 3 );
*bytesused -= 216 ;
go7007_set_motion_regions(go, vb, motion_regions);
}
/*
* 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)
{
u32 *bytesused;
struct go7007_buffer *vb_tmp = NULL;
unsigned long flags;
if (vb == NULL) {
spin_lock_irqsave(&go->spinlock, flags);
if (!list_empty(&go->vidq_active))
vb = go->active_buf =
list_first_entry(&go->vidq_active, struct go7007_buffer, list);
spin_unlock_irqrestore(&go->spinlock, flags);
go->next_seq++;
return vb;
}
bytesused = &vb->vb.vb2_buf.planes[0 ].bytesused;
vb->vb.sequence = go->next_seq++;
if (vb->modet_active && *bytesused + 216 < GO7007_BUF_SIZE)
go7007_motion_regions(go, vb);
else
go7007_set_motion_regions(go, vb, 0 );
vb->vb.vb2_buf.timestamp = ktime_get_ns();
vb_tmp = vb;
spin_lock_irqsave(&go->spinlock, flags);
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_irqrestore(&go->spinlock, flags);
vb2_buffer_done(&vb_tmp->vb.vb2_buf, VB2_BUF_STATE_DONE);
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 & 0 x7);
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 = 0 xB0;
gop_start_code = 0 xB3;
frame_start_code = 0 xB6;
break ;
case V4L2_PIX_FMT_MPEG1:
case V4L2_PIX_FMT_MPEG2:
seq_start_code = 0 xB3;
gop_start_code = 0 xB8;
frame_start_code = 0 x00;
break ;
}
for (i = 0 ; i < length; ++i) {
if (vb && vb->vb.vb2_buf.planes[0 ].bytesused >=
GO7007_BUF_SIZE - 3 ) {
v4l2_info(&go->v4l2_dev, "dropping oversized frame\n" );
vb2_set_plane_payload(&vb->vb.vb2_buf, 0 , 0 );
vb->frame_offset = 0 ;
vb->modet_active = 0 ;
vb = go->active_buf = NULL;
}
switch (go->state) {
case STATE_DATA:
switch (buf[i]) {
case 0 x00:
go->state = STATE_00;
break ;
case 0 xFF:
go->state = STATE_FF;
break ;
default :
store_byte(vb, buf[i]);
break ;
}
break ;
case STATE_00:
switch (buf[i]) {
case 0 x00:
go->state = STATE_00_00;
break ;
case 0 xFF:
store_byte(vb, 0 x00);
go->state = STATE_FF;
break ;
default :
store_byte(vb, 0 x00);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break ;
}
break ;
case STATE_00_00:
switch (buf[i]) {
case 0 x00:
store_byte(vb, 0 x00);
/* go->state remains STATE_00_00 */
break ;
case 0 x01:
go->state = STATE_00_00_01;
break ;
case 0 xFF:
store_byte(vb, 0 x00);
store_byte(vb, 0 x00);
go->state = STATE_FF;
break ;
default :
store_byte(vb, 0 x00);
store_byte(vb, 0 x00);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break ;
}
break ;
case STATE_00_00_01:
if (buf[i] == 0 xF8 && go->modet_enable == 0 ) {
/* MODET start code, but MODET not enabled */
store_byte(vb, 0 x00);
store_byte(vb, 0 x00);
store_byte(vb, 0 x01);
store_byte(vb, 0 xF8);
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.vb2_buf.planes[0 ].bytesused;
}
/* Handle any special chunk types, or just write the
* start code to the (potentially new) buffer */
switch (buf[i]) {
case 0 xF5: /* timestamp */
go->parse_length = 12 ;
go->state = STATE_UNPARSED;
break ;
case 0 xF6: /* vbi */
go->state = STATE_VBI_LEN_A;
break ;
case 0 xF8: /* MD map */
go->parse_length = 0 ;
memset(go->active_map, 0 ,
sizeof (go->active_map));
go->state = STATE_MODET_MAP;
break ;
case 0 xFF: /* Potential JPEG start code */
store_byte(vb, 0 x00);
store_byte(vb, 0 x00);
store_byte(vb, 0 x01);
go->state = STATE_FF;
break ;
default :
store_byte(vb, 0 x00);
store_byte(vb, 0 x00);
store_byte(vb, 0 x01);
store_byte(vb, buf[i]);
go->state = STATE_DATA;
break ;
}
break ;
case STATE_FF:
switch (buf[i]) {
case 0 x00:
store_byte(vb, 0 xFF);
go->state = STATE_00;
break ;
case 0 xFF:
store_byte(vb, 0 xFF);
/* go->state remains STATE_FF */
break ;
case 0 xD8:
if (go->format == V4L2_PIX_FMT_MJPEG)
vb = frame_boundary(go, vb);
fallthrough;
default :
store_byte(vb, 0 xFF);
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;
go = kzalloc(sizeof (struct go7007), GFP_KERNEL);
if (go == NULL)
return NULL;
go->dev = dev;
go->board_info = board;
go->tuner_type = -1 ;
mutex_init(&go->hw_lock);
init_waitqueue_head(&go->frame_waitq);
spin_lock_init(&go->spinlock);
go->status = STATUS_INIT;
init_waitqueue_head(&go->interrupt_waitq);
go7007_update_board(go);
go->format = V4L2_PIX_FMT_MJPEG;
go->bitrate = 1500000 ;
go->fps_scale = 1 ;
go->aspect_ratio = GO7007_RATIO_1_1;
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_DESCRIPTION("WIS GO7007 MPEG encoder support" );
MODULE_LICENSE("GPL v2" );
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