diff options
Diffstat (limited to 'drivers/media/usb/go7007/go7007-driver.c')
| -rw-r--r-- | drivers/media/usb/go7007/go7007-driver.c | 737 |
1 files changed, 737 insertions, 0 deletions
diff --git a/drivers/media/usb/go7007/go7007-driver.c b/drivers/media/usb/go7007/go7007-driver.c new file mode 100644 index 000000000..6650eab91 --- /dev/null +++ b/drivers/media/usb/go7007/go7007-driver.c @@ -0,0 +1,737 @@ +// 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 & 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)); + 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, 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, 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 & 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.vb2_buf.planes[0].bytesused >= + GO7007_BUF_SIZE - 3) { + v4l2_info(&go->v4l2_dev, "dropping oversized frame\n"); + vb->vb.vb2_buf.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.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 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); + fallthrough; + 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; + + 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_LICENSE("GPL v2"); |