diff options
Diffstat (limited to 'drivers/usb/media/sn9c102_core.c')
| -rw-r--r-- | drivers/usb/media/sn9c102_core.c | 2919 |
1 files changed, 0 insertions, 2919 deletions
diff --git a/drivers/usb/media/sn9c102_core.c b/drivers/usb/media/sn9c102_core.c deleted file mode 100644 index 4c6cc6395723..000000000000 --- a/drivers/usb/media/sn9c102_core.c +++ /dev/null @@ -1,2919 +0,0 @@ -/*************************************************************************** - * V4L2 driver for SN9C10x PC Camera Controllers * - * * - * Copyright (C) 2004-2006 by Luca Risolia <luca.risolia@studio.unibo.it> * - * * - * 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/kernel.h> -#include <linux/param.h> -#include <linux/moduleparam.h> -#include <linux/errno.h> -#include <linux/slab.h> -#include <linux/device.h> -#include <linux/fs.h> -#include <linux/delay.h> -#include <linux/compiler.h> -#include <linux/ioctl.h> -#include <linux/poll.h> -#include <linux/stat.h> -#include <linux/mm.h> -#include <linux/vmalloc.h> -#include <linux/page-flags.h> -#include <linux/byteorder/generic.h> -#include <asm/page.h> -#include <asm/uaccess.h> - -#include "sn9c102.h" - -/*****************************************************************************/ - -#define SN9C102_MODULE_NAME "V4L2 driver for SN9C10x PC Camera Controllers" -#define SN9C102_MODULE_AUTHOR "(C) 2004-2006 Luca Risolia" -#define SN9C102_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>" -#define SN9C102_MODULE_LICENSE "GPL" -#define SN9C102_MODULE_VERSION "1:1.27" -#define SN9C102_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 27) - -/*****************************************************************************/ - -MODULE_DEVICE_TABLE(usb, sn9c102_id_table); - -MODULE_AUTHOR(SN9C102_MODULE_AUTHOR " " SN9C102_AUTHOR_EMAIL); -MODULE_DESCRIPTION(SN9C102_MODULE_NAME); -MODULE_VERSION(SN9C102_MODULE_VERSION); -MODULE_LICENSE(SN9C102_MODULE_LICENSE); - -static short video_nr[] = {[0 ... SN9C102_MAX_DEVICES-1] = -1}; -module_param_array(video_nr, short, NULL, 0444); -MODULE_PARM_DESC(video_nr, - "\n<-1|n[,...]> Specify V4L2 minor mode number." - "\n -1 = use next available (default)" - "\n n = use minor number n (integer >= 0)" - "\nYou can specify up to "__MODULE_STRING(SN9C102_MAX_DEVICES) - " cameras this way." - "\nFor example:" - "\nvideo_nr=-1,2,-1 would assign minor number 2 to" - "\nthe second camera and use auto for the first" - "\none and for every other camera." - "\n"); - -static short force_munmap[] = {[0 ... SN9C102_MAX_DEVICES-1] = - SN9C102_FORCE_MUNMAP}; -module_param_array(force_munmap, bool, NULL, 0444); -MODULE_PARM_DESC(force_munmap, - "\n<0|1[,...]> Force the application to unmap previously" - "\nmapped buffer memory before calling any VIDIOC_S_CROP or" - "\nVIDIOC_S_FMT ioctl's. Not all the applications support" - "\nthis feature. This parameter is specific for each" - "\ndetected camera." - "\n 0 = do not force memory unmapping" - "\n 1 = force memory unmapping (save memory)" - "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"." - "\n"); - -static unsigned int frame_timeout[] = {[0 ... SN9C102_MAX_DEVICES-1] = - SN9C102_FRAME_TIMEOUT}; -module_param_array(frame_timeout, uint, NULL, 0644); -MODULE_PARM_DESC(frame_timeout, - "\n<n[,...]> Timeout for a video frame in seconds." - "\nThis parameter is specific for each detected camera." - "\nDefault value is "__MODULE_STRING(SN9C102_FRAME_TIMEOUT)"." - "\n"); - -#ifdef SN9C102_DEBUG -static unsigned short debug = SN9C102_DEBUG_LEVEL; -module_param(debug, ushort, 0644); -MODULE_PARM_DESC(debug, - "\n<n> Debugging information level, from 0 to 3:" - "\n0 = none (use carefully)" - "\n1 = critical errors" - "\n2 = significant informations" - "\n3 = more verbose messages" - "\nLevel 3 is useful for testing only, when only " - "one device is used." - "\nDefault value is "__MODULE_STRING(SN9C102_DEBUG_LEVEL)"." - "\n"); -#endif - -/*****************************************************************************/ - -static sn9c102_sof_header_t sn9c102_sof_header[] = { - {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x00}, - {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x01}, -}; - -static sn9c103_sof_header_t sn9c103_sof_header[] = { - {0xff, 0xff, 0x00, 0xc4, 0xc4, 0x96, 0x20}, -}; - -static sn9c102_eof_header_t sn9c102_eof_header[] = { - {0x00, 0x00, 0x00, 0x00}, - {0x40, 0x00, 0x00, 0x00}, - {0x80, 0x00, 0x00, 0x00}, - {0xc0, 0x00, 0x00, 0x00}, -}; - -/*****************************************************************************/ - -static u32 -sn9c102_request_buffers(struct sn9c102_device* cam, u32 count, - enum sn9c102_io_method io) -{ - struct v4l2_pix_format* p = &(cam->sensor.pix_format); - struct v4l2_rect* r = &(cam->sensor.cropcap.bounds); - const size_t imagesize = cam->module_param.force_munmap || - io == IO_READ ? - (p->width * p->height * p->priv) / 8 : - (r->width * r->height * p->priv) / 8; - void* buff = NULL; - u32 i; - - if (count > SN9C102_MAX_FRAMES) - count = SN9C102_MAX_FRAMES; - - cam->nbuffers = count; - while (cam->nbuffers > 0) { - if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize)))) - break; - cam->nbuffers--; - } - - for (i = 0; i < cam->nbuffers; i++) { - cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize); - cam->frame[i].buf.index = i; - cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize); - cam->frame[i].buf.length = imagesize; - cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - cam->frame[i].buf.sequence = 0; - cam->frame[i].buf.field = V4L2_FIELD_NONE; - cam->frame[i].buf.memory = V4L2_MEMORY_MMAP; - cam->frame[i].buf.flags = 0; - } - - return cam->nbuffers; -} - - -static void sn9c102_release_buffers(struct sn9c102_device* cam) -{ - if (cam->nbuffers) { - vfree(cam->frame[0].bufmem); - cam->nbuffers = 0; - } - cam->frame_current = NULL; -} - - -static void sn9c102_empty_framequeues(struct sn9c102_device* cam) -{ - u32 i; - - INIT_LIST_HEAD(&cam->inqueue); - INIT_LIST_HEAD(&cam->outqueue); - - for (i = 0; i < SN9C102_MAX_FRAMES; i++) { - cam->frame[i].state = F_UNUSED; - cam->frame[i].buf.bytesused = 0; - } -} - - -static void sn9c102_requeue_outqueue(struct sn9c102_device* cam) -{ - struct sn9c102_frame_t *i; - - list_for_each_entry(i, &cam->outqueue, frame) { - i->state = F_QUEUED; - list_add(&i->frame, &cam->inqueue); - } - - INIT_LIST_HEAD(&cam->outqueue); -} - - -static void sn9c102_queue_unusedframes(struct sn9c102_device* cam) -{ - unsigned long lock_flags; - u32 i; - - for (i = 0; i < cam->nbuffers; i++) - if (cam->frame[i].state == F_UNUSED) { - cam->frame[i].state = F_QUEUED; - spin_lock_irqsave(&cam->queue_lock, lock_flags); - list_add_tail(&cam->frame[i].frame, &cam->inqueue); - spin_unlock_irqrestore(&cam->queue_lock, lock_flags); - } -} - -/*****************************************************************************/ - -int sn9c102_write_regs(struct sn9c102_device* cam, u8* buff, u16 index) -{ - struct usb_device* udev = cam->usbdev; - int i, res; - - if (index + sizeof(buff) >= ARRAY_SIZE(cam->reg)) - return -1; - - res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, - index, 0, buff, sizeof(buff), - SN9C102_CTRL_TIMEOUT*sizeof(buff)); - if (res < 0) { - DBG(3, "Failed to write registers (index 0x%02X, error %d)", - index, res); - return -1; - } - - for (i = 0; i < sizeof(buff); i++) - cam->reg[index+i] = buff[i]; - - return 0; -} - - -int sn9c102_write_reg(struct sn9c102_device* cam, u8 value, u16 index) -{ - struct usb_device* udev = cam->usbdev; - u8* buff = cam->control_buffer; - int res; - - if (index >= ARRAY_SIZE(cam->reg)) - return -1; - - *buff = value; - - res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, - index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); - if (res < 0) { - DBG(3, "Failed to write a register (value 0x%02X, index " - "0x%02X, error %d)", value, index, res); - return -1; - } - - cam->reg[index] = value; - - return 0; -} - - -/* NOTE: reading some registers always returns 0 */ -static int sn9c102_read_reg(struct sn9c102_device* cam, u16 index) -{ - struct usb_device* udev = cam->usbdev; - u8* buff = cam->control_buffer; - int res; - - res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, - index, 0, buff, 1, SN9C102_CTRL_TIMEOUT); - if (res < 0) - DBG(3, "Failed to read a register (index 0x%02X, error %d)", - index, res); - - return (res >= 0) ? (int)(*buff) : -1; -} - - -int sn9c102_pread_reg(struct sn9c102_device* cam, u16 index) -{ - if (index >= ARRAY_SIZE(cam->reg)) - return -1; - - return cam->reg[index]; -} - - -static int -sn9c102_i2c_wait(struct sn9c102_device* cam, struct sn9c102_sensor* sensor) -{ - int i, r; - - for (i = 1; i <= 5; i++) { - r = sn9c102_read_reg(cam, 0x08); - if (r < 0) - return -EIO; - if (r & 0x04) - return 0; - if (sensor->frequency & SN9C102_I2C_400KHZ) - udelay(5*16); - else - udelay(16*16); - } - return -EBUSY; -} - - -static int -sn9c102_i2c_detect_read_error(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor) -{ - int r; - r = sn9c102_read_reg(cam, 0x08); - return (r < 0 || (r >= 0 && !(r & 0x08))) ? -EIO : 0; -} - - -static int -sn9c102_i2c_detect_write_error(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor) -{ - int r; - r = sn9c102_read_reg(cam, 0x08); - return (r < 0 || (r >= 0 && (r & 0x08))) ? -EIO : 0; -} - - -int -sn9c102_i2c_try_raw_read(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor, u8 data0, u8 data1, - u8 n, u8 buffer[]) -{ - struct usb_device* udev = cam->usbdev; - u8* data = cam->control_buffer; - int err = 0, res; - - /* Write cycle */ - data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | - ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | 0x10; - data[1] = data0; /* I2C slave id */ - data[2] = data1; /* address */ - data[7] = 0x10; - res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, - 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); - if (res < 0) - err += res; - - err += sn9c102_i2c_wait(cam, sensor); - - /* Read cycle - n bytes */ - data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | - ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) | - (n << 4) | 0x02; - data[1] = data0; - data[7] = 0x10; - res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, - 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); - if (res < 0) - err += res; - - err += sn9c102_i2c_wait(cam, sensor); - - /* The first read byte will be placed in data[4] */ - res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1, - 0x0a, 0, data, 5, SN9C102_CTRL_TIMEOUT); - if (res < 0) - err += res; - - err += sn9c102_i2c_detect_read_error(cam, sensor); - - PDBGG("I2C read: address 0x%02X, first read byte: 0x%02X", data1, - data[4]); - - if (err) { - DBG(3, "I2C read failed for %s image sensor", sensor->name); - return -1; - } - - if (buffer) - memcpy(buffer, data, sizeof(buffer)); - - return (int)data[4]; -} - - -int -sn9c102_i2c_try_raw_write(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor, u8 n, u8 data0, - u8 data1, u8 data2, u8 data3, u8 data4, u8 data5) -{ - struct usb_device* udev = cam->usbdev; - u8* data = cam->control_buffer; - int err = 0, res; - - /* Write cycle. It usually is address + value */ - data[0] = ((sensor->interface == SN9C102_I2C_2WIRES) ? 0x80 : 0) | - ((sensor->frequency & SN9C102_I2C_400KHZ) ? 0x01 : 0) - | ((n - 1) << 4); - data[1] = data0; - data[2] = data1; - data[3] = data2; - data[4] = data3; - data[5] = data4; - data[6] = data5; - data[7] = 0x14; - res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x08, 0x41, - 0x08, 0, data, 8, SN9C102_CTRL_TIMEOUT); - if (res < 0) - err += res; - - err += sn9c102_i2c_wait(cam, sensor); - err += sn9c102_i2c_detect_write_error(cam, sensor); - - if (err) - DBG(3, "I2C write failed for %s image sensor", sensor->name); - - PDBGG("I2C raw write: %u bytes, data0 = 0x%02X, data1 = 0x%02X, " - "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X", - n, data0, data1, data2, data3, data4, data5); - - return err ? -1 : 0; -} - - -int -sn9c102_i2c_try_read(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor, u8 address) -{ - return sn9c102_i2c_try_raw_read(cam, sensor, sensor->i2c_slave_id, - address, 1, NULL); -} - - -int -sn9c102_i2c_try_write(struct sn9c102_device* cam, - struct sn9c102_sensor* sensor, u8 address, u8 value) -{ - return sn9c102_i2c_try_raw_write(cam, sensor, 3, - sensor->i2c_slave_id, address, - value, 0, 0, 0); -} - - -int sn9c102_i2c_read(struct sn9c102_device* cam, u8 address) -{ - return sn9c102_i2c_try_read(cam, &cam->sensor, address); -} - - -int sn9c102_i2c_write(struct sn9c102_device* cam, u8 address, u8 value) -{ - return sn9c102_i2c_try_write(cam, &cam->sensor, address, value); -} - -/*****************************************************************************/ - -static void* -sn9c102_find_sof_header(struct sn9c102_device* cam, void* mem, size_t len) -{ - size_t soflen = 0, i; - u8 j, n = 0; - - switch (cam->bridge) { - case BRIDGE_SN9C101: - case BRIDGE_SN9C102: - soflen = sizeof(sn9c102_sof_header_t); - n = sizeof(sn9c102_sof_header) / soflen; - break; - case BRIDGE_SN9C103: - soflen = sizeof(sn9c103_sof_header_t); - n = sizeof(sn9c103_sof_header) / soflen; - } - - for (i = 0; (len >= soflen) && (i <= len - soflen); i++) - for (j = 0; j < n; j++) - /* The invariable part of the header is 6 bytes long */ - if ((cam->bridge != BRIDGE_SN9C103 && - !memcmp(mem + i, sn9c102_sof_header[j], 6)) || - (cam->bridge == BRIDGE_SN9C103 && - !memcmp(mem + i, sn9c103_sof_header[j], 6))) { - memcpy(cam->sof_header, mem + i, soflen); - /* Skip the header */ - return mem + i + soflen; - } - - return NULL; -} - - -static void* -sn9c102_find_eof_header(struct sn9c102_device* cam, void* mem, size_t len) -{ - size_t eoflen = sizeof(sn9c102_eof_header_t), i; - unsigned j, n = sizeof(sn9c102_eof_header) / eoflen; - - if (cam->sensor.pix_format.pixelformat == V4L2_PIX_FMT_SN9C10X) - return NULL; /* EOF header does not exist in compressed data */ - - for (i = 0; (len >= eoflen) && (i <= len - eoflen); i++) - for (j = 0; j < n; j++) - if (!memcmp(mem + i, sn9c102_eof_header[j], eoflen)) - return mem + i; - - return NULL; -} - - -static void sn9c102_urb_complete(struct urb *urb, struct pt_regs* regs) -{ - struct sn9c102_device* cam = urb->context; - struct sn9c102_frame_t** f; - size_t imagesize, soflen; - u8 i; - int err = 0; - - if (urb->status == -ENOENT) - return; - - f = &cam->frame_current; - - if (cam->stream == STREAM_INTERRUPT) { - cam->stream = STREAM_OFF; - if ((*f)) - (*f)->state = F_QUEUED; - DBG(3, "Stream interrupted"); - wake_up(&cam->wait_stream); - } - - if (cam->state & DEV_DISCONNECTED) - return; - - if (cam->state & DEV_MISCONFIGURED) { - wake_up_interruptible(&cam->wait_frame); - return; - } - - if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue)) - goto resubmit_urb; - - if (!(*f)) - (*f) = list_entry(cam->inqueue.next, struct sn9c102_frame_t, - frame); - - imagesize = (cam->sensor.pix_format.width * - cam->sensor.pix_format.height * - cam->sensor.pix_format.priv) / 8; - - soflen = (cam->bridge) == BRIDGE_SN9C103 ? - sizeof(sn9c103_sof_header_t) : - sizeof(sn9c102_sof_header_t); - - for (i = 0; i < urb->number_of_packets; i++) { - unsigned int img, len, status; - void *pos, *sof, *eof; - - len = urb->iso_frame_desc[i].actual_length; - status = urb->iso_frame_desc[i].status; - pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer; - - if (status) { - DBG(3, "Error in isochronous frame"); - (*f)->state = F_ERROR; - continue; - } - - PDBGG("Isochrnous frame: length %u, #%u i", len, i); - -redo: - sof = sn9c102_find_sof_header(cam, pos, len); - if (likely(!sof)) { - eof = sn9c102_find_eof_header(cam, pos, len); - if ((*f)->state == F_GRABBING) { -end_of_frame: - img = len; - - if (eof) - img = (eof > pos) ? eof - pos - 1 : 0; - - if ((*f)->buf.bytesused+img > imagesize) { - u32 b; - b = (*f)->buf.bytesused + img - - imagesize; - img = imagesize - (*f)->buf.bytesused; - DBG(3, "Expected EOF not found: " - "video frame cut"); - if (eof) - DBG(3, "Exceeded limit: +%u " - "bytes", (unsigned)(b)); - } - - memcpy((*f)->bufmem + (*f)->buf.bytesused, pos, - img); - - if ((*f)->buf.bytesused == 0) - do_gettimeofday(&(*f)->buf.timestamp); - - (*f)->buf.bytesused += img; - - if ((*f)->buf.bytesused == imagesize || - (cam->sensor.pix_format.pixelformat == - V4L2_PIX_FMT_SN9C10X && eof)) { - u32 b; - b = (*f)->buf.bytesused; - (*f)->state = F_DONE; - (*f)->buf.sequence= ++cam->frame_count; - spin_lock(&cam->queue_lock); - list_move_tail(&(*f)->frame, - &cam->outqueue); - if (!list_empty(&cam->inqueue)) - (*f) = list_entry( - cam->inqueue.next, - struct sn9c102_frame_t, - frame ); - else - (*f) = NULL; - spin_unlock(&cam->queue_lock); - memcpy(cam->sysfs.frame_header, - cam->sof_header, soflen); - DBG(3, "Video frame captured: %lu " - "bytes", (unsigned long)(b)); - - if (!(*f)) - goto resubmit_urb; - - } else if (eof) { - (*f)->state = F_ERROR; - DBG(3, "Not expected EOF after %lu " - "bytes of image data", - (unsigned long) - ((*f)->buf.bytesused)); - } - - if (sof) /* (1) */ - goto start_of_frame; - - } else if (eof) { - DBG(3, "EOF without SOF"); - continue; - - } else { - PDBGG("Ignoring pointless isochronous frame"); - continue; - } - - } else if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR) { -start_of_frame: - (*f)->state = F_GRABBING; - (*f)->buf.bytesused = 0; - len -= (sof - pos); - pos = sof; - DBG(3, "SOF detected: new video frame"); - if (len) - goto redo; - - } else if ((*f)->state == F_GRABBING) { - eof = sn9c102_find_eof_header(cam, pos, len); - if (eof && eof < sof) - goto end_of_frame; /* (1) */ - else { - if (cam->sensor.pix_format.pixelformat == - V4L2_PIX_FMT_SN9C10X) { - eof = sof - soflen; - goto end_of_frame; - } else { - DBG(3, "SOF before expected EOF after " - "%lu bytes of image data", - (unsigned long) - ((*f)->buf.bytesused)); - goto start_of_frame; - } - } - } - } - -resubmit_urb: - urb->dev = cam->usbdev; - err = usb_submit_urb(urb, GFP_ATOMIC); - if (err < 0 && err != -EPERM) { - cam->state |= DEV_MISCONFIGURED; - DBG(1, "usb_submit_urb() failed"); - } - - wake_up_interruptible(&cam->wait_frame); -} - - -static int sn9c102_start_transfer(struct sn9c102_device* cam) -{ - struct usb_device *udev = cam->usbdev; - struct urb* urb; - const unsigned int sn9c102_wMaxPacketSize[] = {0, 128, 256, 384, 512, - 680, 800, 900, 1023}; - const unsigned int sn9c103_wMaxPacketSize[] = {0, 128, 256, 384, 512, - 680, 800, 900, 1003}; - const unsigned int psz = (cam->bridge == BRIDGE_SN9C103) ? - sn9c103_wMaxPacketSize[SN9C102_ALTERNATE_SETTING] : - sn9c102_wMaxPacketSize[SN9C102_ALTERNATE_SETTING]; - s8 i, j; - int err = 0; - - for (i = 0; i < SN9C102_URBS; i++) { - cam->transfer_buffer[i] = kzalloc(SN9C102_ISO_PACKETS * psz, - GFP_KERNEL); - if (!cam->transfer_buffer[i]) { - err = -ENOMEM; - DBG(1, "Not enough memory"); - goto free_buffers; - } - } - - for (i = 0; i < SN9C102_URBS; i++) { - urb = usb_alloc_urb(SN9C102_ISO_PACKETS, GFP_KERNEL); - cam->urb[i] = urb; - if (!urb) { - err = -ENOMEM; - DBG(1, "usb_alloc_urb() failed"); - goto free_urbs; - } - urb->dev = udev; - urb->context = cam; - urb->pipe = usb_rcvisocpipe(udev, 1); - urb->transfer_flags = URB_ISO_ASAP; - urb->number_of_packets = SN9C102_ISO_PACKETS; - urb->complete = sn9c102_urb_complete; - urb->transfer_buffer = cam->transfer_buffer[i]; - urb->transfer_buffer_length = psz * SN9C102_ISO_PACKETS; - urb->interval = 1; - for (j = 0; j < SN9C102_ISO_PACKETS; j++) { - urb->iso_frame_desc[j].offset = psz * j; - urb->iso_frame_desc[j].length = psz; - } - } - - /* Enable video */ - if (!(cam->reg[0x01] & 0x04)) { - err = sn9c102_write_reg(cam, cam->reg[0x01] | 0x04, 0x01); - if (err) { - err = -EIO; - DBG(1, "I/O hardware error"); - goto free_urbs; - } - } - - err = usb_set_interface(udev, 0, SN9C102_ALTERNATE_SETTING); - if (err) { - DBG(1, "usb_set_interface() failed"); - goto free_urbs; - } - - cam->frame_current = NULL; - - for (i = 0; i < SN9C102_URBS; i++) { - err = usb_submit_urb(cam->urb[i], GFP_KERNEL); - if (err) { - for (j = i-1; j >= 0; j--) - usb_kill_urb(cam->urb[j]); - DBG(1, "usb_submit_urb() failed, error %d", err); - goto free_urbs; - } - } - - return 0; - -free_urbs: - for (i = 0; (i < SN9C102_URBS) && cam->urb[i]; i++) - usb_free_urb(cam->urb[i]); - -free_buffers: - for (i = 0; (i < SN9C102_URBS) && cam->transfer_buffer[i]; i++) - kfree(cam->transfer_buffer[i]); - - return err; -} - - -static int sn9c102_stop_transfer(struct sn9c102_device* cam) -{ - struct usb_device *udev = cam->usbdev; - s8 i; - int err = 0; - - if (cam->state & DEV_DISCONNECTED) - return 0; - - for (i = SN9C102_URBS-1; i >= 0; i--) { - usb_kill_urb(cam->urb[i]); - usb_free_urb(cam->urb[i]); - kfree(cam->transfer_buffer[i]); - } - - err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */ - if (err) - DBG(3, "usb_set_interface() failed"); - - return err; -} - - -static int sn9c102_stream_interrupt(struct sn9c102_device* cam) -{ - long timeout; - - cam->stream = STREAM_INTERRUPT; - timeout = wait_event_timeout(cam->wait_stream, - (cam->stream == STREAM_OFF) || - (cam->state & DEV_DISCONNECTED), - SN9C102_URB_TIMEOUT); - if (cam->state & DEV_DISCONNECTED) - return -ENODEV; - else if (cam->stream != STREAM_OFF) { - cam->state |= DEV_MISCONFIGURED; - DBG(1, "URB timeout reached. The camera is misconfigured. " - "To use it, close and open /dev/video%d again.", - cam->v4ldev->minor); - return -EIO; - } - - return 0; -} - -/*****************************************************************************/ - -#ifdef CONFIG_VIDEO_ADV_DEBUG -static u8 sn9c102_strtou8(const char* buff, size_t len, ssize_t* count) -{ - char str[5]; - char* endp; - unsigned long val; - - if (len < 4) { - strncpy(str, buff, len); - str[len+1] = '\0'; - } else { - strncpy(str, buff, 4); - str[4] = '\0'; - } - - val = simple_strtoul(str, &endp, 0); - - *count = 0; - if (val <= 0xff) - *count = (ssize_t)(endp - str); - if ((*count) && (len == *count+1) && (buff[*count] == '\n')) - *count += 1; - - return (u8)val; -} - -/* - NOTE 1: being inside one of the following methods implies that the v4l - device exists for sure (see kobjects and reference counters) - NOTE 2: buffers are PAGE_SIZE long -*/ - -static ssize_t sn9c102_show_reg(struct class_device* cd, char* buf) -{ - struct sn9c102_device* cam; - ssize_t count; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - count = sprintf(buf, "%u\n", cam->sysfs.reg); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t -sn9c102_store_reg(struct class_device* cd, const char* buf, size_t len) -{ - struct sn9c102_device* cam; - u8 index; - ssize_t count; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - index = sn9c102_strtou8(buf, len, &count); - if (index > 0x1f || !count) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EINVAL; - } - - cam->sysfs.reg = index; - - DBG(2, "Moved SN9C10X register index to 0x%02X", cam->sysfs.reg); - DBG(3, "Written bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t sn9c102_show_val(struct class_device* cd, char* buf) -{ - struct sn9c102_device* cam; - ssize_t count; - int val; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - if ((val = sn9c102_read_reg(cam, cam->sysfs.reg)) < 0) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EIO; - } - - count = sprintf(buf, "%d\n", val); - - DBG(3, "Read bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t -sn9c102_store_val(struct class_device* cd, const char* buf, size_t len) -{ - struct sn9c102_device* cam; - u8 value; - ssize_t count; - int err; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - value = sn9c102_strtou8(buf, len, &count); - if (!count) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EINVAL; - } - - err = sn9c102_write_reg(cam, value, cam->sysfs.reg); - if (err) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EIO; - } - - DBG(2, "Written SN9C10X reg. 0x%02X, val. 0x%02X", - cam->sysfs.reg, value); - DBG(3, "Written bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t sn9c102_show_i2c_reg(struct class_device* cd, char* buf) -{ - struct sn9c102_device* cam; - ssize_t count; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg); - - DBG(3, "Read bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t -sn9c102_store_i2c_reg(struct class_device* cd, const char* buf, size_t len) -{ - struct sn9c102_device* cam; - u8 index; - ssize_t count; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - index = sn9c102_strtou8(buf, len, &count); - if (!count) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EINVAL; - } - - cam->sysfs.i2c_reg = index; - - DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg); - DBG(3, "Written bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t sn9c102_show_i2c_val(struct class_device* cd, char* buf) -{ - struct sn9c102_device* cam; - ssize_t count; - int val; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - if (!(cam->sensor.sysfs_ops & SN9C102_I2C_READ)) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENOSYS; - } - - if ((val = sn9c102_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EIO; - } - - count = sprintf(buf, "%d\n", val); - - DBG(3, "Read bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t -sn9c102_store_i2c_val(struct class_device* cd, const char* buf, size_t len) -{ - struct sn9c102_device* cam; - u8 value; - ssize_t count; - int err; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - if (!(cam->sensor.sysfs_ops & SN9C102_I2C_WRITE)) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENOSYS; - } - - value = sn9c102_strtou8(buf, len, &count); - if (!count) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EINVAL; - } - - err = sn9c102_i2c_write(cam, cam->sysfs.i2c_reg, value); - if (err) { - mutex_unlock(&sn9c102_sysfs_lock); - return -EIO; - } - - DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X", - cam->sysfs.i2c_reg, value); - DBG(3, "Written bytes: %zd", count); - - mutex_unlock(&sn9c102_sysfs_lock); - - return count; -} - - -static ssize_t -sn9c102_store_green(struct class_device* cd, const char* buf, size_t len) -{ - struct sn9c102_device* cam; - enum sn9c102_bridge bridge; - ssize_t res = 0; - u8 value; - ssize_t count; - - if (mutex_lock_interruptible(&sn9c102_sysfs_lock)) - return -ERESTARTSYS; - - cam = video_get_drvdata(to_video_device(cd)); - if (!cam) { - mutex_unlock(&sn9c102_sysfs_lock); - return -ENODEV; - } - - bridge = cam->bridge; - - mutex_unlock(&sn9c102_sysfs_lock); - - value = sn9c102_strtou8(buf, len, &count); - if (!count) - return -EINVAL; - - switch (bridge) { - case BRIDGE_SN9C101: - case BRIDGE_SN9C102: - if (value > 0x0f) - return -EINVAL; - if ((res = sn9c102_store_reg(cd, "0x11", 4)) >= 0) - res = sn9c102_store_val(cd, buf, len); - break; - case BRIDGE_SN9C103: - if (value > 0x7f) - return -EINVAL; - if ((res = sn9c102_store_reg(cd, "0x04", 4)) >= 0) - res = sn9c102_store_val(cd, buf, len); - break; - } - - return res; -} |