diff options
author | Greg Kroah-Hartman <gregkh@suse.de> | 2008-02-16 00:53:09 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-10-10 22:31:08 (GMT) |
commit | 866b8695d67e83f47194731d3a7ba55826a7ec70 (patch) | |
tree | 946a4850d3850edeac3634e6d4dd24928779f0c5 /drivers/staging/go7007/go7007-driver.c | |
parent | c0f005888c6663898a040cd922947dd8caa55160 (diff) | |
download | linux-fsl-qoriq-866b8695d67e83f47194731d3a7ba55826a7ec70.tar.xz |
Staging: add the go7007 video driver
Todo:
- checkpatch.pl cleanups
- sparse cleanups
- lots of little modules, should be merged together
and added to the build.
- testing?
- handle churn in v4l layer.
Many thanks to Ross Cohen <rcohen@snurgle.org> for cleanup patches on
this driver.
Cc: Ross Cohen <rcohen@snurgle.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/go7007/go7007-driver.c')
-rw-r--r-- | drivers/staging/go7007/go7007-driver.c | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/drivers/staging/go7007/go7007-driver.c b/drivers/staging/go7007/go7007-driver.c new file mode 100644 index 0000000..5a336ff --- /dev/null +++ b/drivers/staging/go7007/go7007-driver.c @@ -0,0 +1,688 @@ +/* + * 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/version.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/semaphore.h> +#include <linux/uaccess.h> +#include <asm/system.h> +#include <linux/videodev.h> +#include <media/tuner.h> +#include <media/v4l2-common.h> + +#include "go7007-priv.h" +#include "wis-i2c.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) { + printk(KERN_ERR "go7007: 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[] = "go7007fw.bin"; + void *bounce; + int fw_len, rv = 0; + u16 intr_val, intr_data; + + if (request_firmware(&fw_entry, fw_name, go->dev)) { + printk(KERN_ERR + "go7007: unable to load firmware from file \"%s\"\n", + fw_name); + return -1; + } + if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) { + printk(KERN_ERR "go7007: 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 = kmalloc(fw_len, GFP_KERNEL); + if (bounce == NULL) { + printk(KERN_ERR "go7007: unable to allocate %d bytes for " + "firmware transfer\n", fw_len); + release_firmware(fw_entry); + return -1; + } + memcpy(bounce, fw_entry->data + 16, fw_len); + release_firmware(fw_entry); + if (go7007_interface_reset(go) < 0 || + go7007_send_firmware(go, bounce, fw_len) < 0 || + go7007_read_interrupt(go, &intr_val, &intr_data) < 0 || + (intr_val & ~0x1) != 0x5a5a) { + printk(KERN_ERR "go7007: error transferring firmware\n"); + rv = -1; + } + kfree(bounce); + return rv; +} + +/* + * 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; + + down(&go->hw_lock); + ret = go7007_load_encoder(go); + up(&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); + } + if (go->board_id == 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); + } + 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, int id, int addr) +{ + char *modname; + + switch (id) { + case I2C_DRIVERID_WIS_SAA7115: + modname = "wis-saa7115"; + break; + case I2C_DRIVERID_WIS_SAA7113: + modname = "wis-saa7113"; + break; + case I2C_DRIVERID_WIS_UDA1342: + modname = "wis-uda1342"; + break; + case I2C_DRIVERID_WIS_SONY_TUNER: + modname = "wis-sony-tuner"; + break; + case I2C_DRIVERID_WIS_TW9903: + modname = "wis-tw9903"; + break; + case I2C_DRIVERID_WIS_TW2804: + modname = "wis-tw2804"; + break; + case I2C_DRIVERID_WIS_OV7640: + modname = "wis-ov7640"; + break; + default: + modname = NULL; + break; + } + if (modname != NULL) + request_module(modname); + if (wis_i2c_probe_device(adapter, id, addr) == 1) + return 0; + if (modname != NULL) + printk(KERN_INFO + "go7007: probing for module %s failed", modname); + else + printk(KERN_INFO + "go7007: sensor %u seems to be unsupported!\n", id); + return -1; +} + +/* + * 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) +{ + int i, ret; + + printk(KERN_INFO "go7007: registering new %s\n", go->name); + + down(&go->hw_lock); + ret = go7007_init_encoder(go); + up(&go->hw_lock); + if (ret < 0) + return -1; + + if (!go->i2c_adapter_online && + go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) { + if (go7007_i2c_init(go) < 0) + return -1; + go->i2c_adapter_online = 1; + } + if (go->i2c_adapter_online) { + for (i = 0; i < go->board_info->num_i2c_devs; ++i) + init_i2c_module(&go->i2c_adapter, + go->board_info->i2c_devs[i].id, + go->board_info->i2c_devs[i].addr); +#ifdef TUNER_SET_TYPE_ADDR + if (go->tuner_type >= 0) { + struct tuner_setup tun_setup = { + .mode_mask = T_ANALOG_TV, + .addr = ADDR_UNSET, + .type = go->tuner_type + }; + i2c_clients_command(&go->i2c_adapter, + TUNER_SET_TYPE_ADDR, &tun_setup); + } +#else + if (go->tuner_type >= 0) + i2c_clients_command(&go->i2c_adapter, + TUNER_SET_TYPE, &go->tuner_type); +#endif + if (go->board_id == GO7007_BOARDID_ADLINK_MPG24) + i2c_clients_command(&go->i2c_adapter, + DECODER_SET_CHANNEL, &go->channel_number); + } + if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) { + go->audio_enabled = 1; + go7007_snd_init(go); + } + return go7007_v4l2_init(go); +} +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) { + printk(KERN_ERR "go7007: 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) { + printk(KERN_ERR "go7007: 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 *gobuf, u8 byte) +{ + if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) { + unsigned int pgidx = gobuf->offset >> PAGE_SHIFT; + unsigned int pgoff = gobuf->offset & ~PAGE_MASK; + + *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte; + ++gobuf->offset; + ++gobuf->bytesused; + } +} + +/* + * Deliver the last video buffer and get a new one to start writing to. + */ +static void frame_boundary(struct go7007 *go) +{ + struct go7007_buffer *gobuf; + int i; + + if (go->active_buf) { + if (go->active_buf->modet_active) { + if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) { + for (i = 0; i < 216; ++i) + store_byte(go->active_buf, + go->active_map[i]); + go->active_buf->bytesused -= 216; + } else + go->active_buf->modet_active = 0; + } + go->active_buf->state = BUF_STATE_DONE; + wake_up_interruptible(&go->frame_waitq); + go->active_buf = NULL; + } + list_for_each_entry(gobuf, &go->stream, stream) + if (gobuf->state == BUF_STATE_QUEUED) { + gobuf->seq = go->next_seq; + do_gettimeofday(&gobuf->timestamp); + go->active_buf = gobuf; + break; + } + ++go->next_seq; +} + +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); + 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) +{ + int i, seq_start_code = -1, frame_start_code = -1; + + spin_lock(&go->spinlock); + + switch (go->format) { + case GO7007_FORMAT_MPEG4: + seq_start_code = 0xB0; + frame_start_code = 0xB6; + break; + case GO7007_FORMAT_MPEG1: + case GO7007_FORMAT_MPEG2: + seq_start_code = 0xB3; + frame_start_code = 0x00; + break; + } + + for (i = 0; i < length; ++i) { + if (go->active_buf != NULL && + go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) { + printk(KERN_DEBUG "go7007: dropping oversized frame\n"); + go->active_buf->offset -= go->active_buf->bytesused; + go->active_buf->bytesused = 0; + go->active_buf->modet_active = 0; + 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(go->active_buf, buf[i]); + break; + } + break; + case STATE_00: + switch (buf[i]) { + case 0x00: + go->state = STATE_00_00; + break; + case 0xFF: + store_byte(go->active_buf, 0x00); + go->state = STATE_FF; + break; + default: + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, buf[i]); + go->state = STATE_DATA; + break; + } + break; + case STATE_00_00: + switch (buf[i]) { + case 0x00: + store_byte(go->active_buf, 0x00); + /* go->state remains STATE_00_00 */ + break; + case 0x01: + go->state = STATE_00_00_01; + break; + case 0xFF: + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, 0x00); + go->state = STATE_FF; + break; + default: + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, buf[i]); + go->state = STATE_DATA; + break; + } + break; + case STATE_00_00_01: + /* If this is the start of a new MPEG frame, + * get a new buffer */ + if ((go->format == GO7007_FORMAT_MPEG1 || + go->format == GO7007_FORMAT_MPEG2 || + go->format == GO7007_FORMAT_MPEG4) && + (buf[i] == seq_start_code || + buf[i] == 0xB8 || /* GOP code */ + buf[i] == frame_start_code)) { + if (go->active_buf == NULL || go->seen_frame) + frame_boundary(go); + if (buf[i] == frame_start_code) { + if (go->active_buf != NULL) + go->active_buf->frame_offset = + go->active_buf->offset; + go->seen_frame = 1; + } else { + go->seen_frame = 0; + } + } + /* 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(go->active_buf, 0x00); + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, 0x01); + go->state = STATE_FF; + break; + default: + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, 0x00); + store_byte(go->active_buf, 0x01); + store_byte(go->active_buf, buf[i]); + go->state = STATE_DATA; + break; + } + break; + case STATE_FF: + switch (buf[i]) { + case 0x00: + store_byte(go->active_buf, 0xFF); + go->state = STATE_00; + break; + case 0xFF: + store_byte(go->active_buf, 0xFF); + /* go->state remains STATE_FF */ + break; + case 0xD8: + if (go->format == GO7007_FORMAT_MJPEG) + frame_boundary(go); + /* fall through */ + default: + store_byte(go->active_buf, 0xFF); + store_byte(go->active_buf, 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 && go->active_buf) { + go->active_buf->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; + } + } + + spin_unlock(&go->spinlock); +} +EXPORT_SYMBOL(go7007_parse_video_stream); + +/* + * Allocate a new go7007 struct. Used by the hardware-specific probe. + */ +struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev) +{ + struct go7007 *go; + int i; + + go = kmalloc(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; + init_MUTEX(&go->hw_lock); + init_waitqueue_head(&go->frame_waitq); + spin_lock_init(&go->spinlock); + go->video_dev = NULL; + go->ref_count = 0; + 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->in_use = 0; + go->input = 0; + if (board->sensor_flags & GO7007_SENSOR_TV) { + go->standard = GO7007_STD_NTSC; + 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; + go->encoder_h_halve = 0; + go->encoder_v_halve = 0; + go->encoder_subsample = 0; + go->streaming = 0; + go->format = GO7007_FORMAT_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; + INIT_LIST_HEAD(&go->stream); + + return go; +} +EXPORT_SYMBOL(go7007_alloc); + +/* + * 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. + */ +void go7007_remove(struct go7007 *go) +{ + if (go->i2c_adapter_online) { + if (i2c_del_adapter(&go->i2c_adapter) == 0) + go->i2c_adapter_online = 0; + else + printk(KERN_ERR + "go7007: error removing I2C adapter!\n"); + } + + if (go->audio_enabled) + go7007_snd_remove(go); + go7007_v4l2_remove(go); +} +EXPORT_SYMBOL(go7007_remove); + +MODULE_LICENSE("GPL v2"); |