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843 lines
20 KiB
843 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* STK1160 driver |
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* |
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* Copyright (C) 2012 Ezequiel Garcia |
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* <elezegarcia--a.t--gmail.com> |
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* |
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* Based on Easycap driver by R.M. Thomas |
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* Copyright (C) 2010 R.M. Thomas |
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* <rmthomas--a.t--sciolus.org> |
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*/ |
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|
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#include <linux/module.h> |
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#include <linux/usb.h> |
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#include <linux/mm.h> |
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#include <linux/slab.h> |
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|
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-common.h> |
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#include <media/v4l2-ioctl.h> |
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#include <media/v4l2-fh.h> |
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#include <media/v4l2-event.h> |
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#include <media/videobuf2-vmalloc.h> |
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#include <media/i2c/saa7115.h> |
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#include "stk1160.h" |
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#include "stk1160-reg.h" |
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|
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static bool keep_buffers; |
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module_param(keep_buffers, bool, 0644); |
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MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming"); |
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enum stk1160_decimate_mode { |
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STK1160_DECIMATE_MORE_THAN_HALF, |
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STK1160_DECIMATE_LESS_THAN_HALF, |
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}; |
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struct stk1160_decimate_ctrl { |
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bool col_en, row_en; |
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enum stk1160_decimate_mode col_mode, row_mode; |
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unsigned int col_n, row_n; |
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}; |
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|
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/* supported video standards */ |
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static struct stk1160_fmt format[] = { |
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{ |
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.fourcc = V4L2_PIX_FMT_UYVY, |
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.depth = 16, |
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} |
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}; |
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|
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/* |
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* Helper to find the next divisor that results in modulo being zero. |
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* This is required to guarantee valid decimation unit counts. |
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*/ |
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static unsigned int |
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div_round_integer(unsigned int x, unsigned int y) |
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{ |
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for (;; y++) { |
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if (x % y == 0) |
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return x / y; |
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} |
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} |
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static void stk1160_set_std(struct stk1160 *dev) |
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{ |
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int i; |
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static struct regval std525[] = { |
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|
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/* 720x480 */ |
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|
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/* Frame start */ |
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{STK116_CFSPO_STX_L, 0x0000}, |
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{STK116_CFSPO_STX_H, 0x0000}, |
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{STK116_CFSPO_STY_L, 0x0003}, |
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{STK116_CFSPO_STY_H, 0x0000}, |
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|
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/* Frame end */ |
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{STK116_CFEPO_ENX_L, 0x05a0}, |
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{STK116_CFEPO_ENX_H, 0x0005}, |
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{STK116_CFEPO_ENY_L, 0x00f3}, |
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{STK116_CFEPO_ENY_H, 0x0000}, |
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{0xffff, 0xffff} |
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}; |
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static struct regval std625[] = { |
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|
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/* 720x576 */ |
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|
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/* TODO: Each line of frame has some junk at the end */ |
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/* Frame start */ |
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{STK116_CFSPO, 0x0000}, |
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{STK116_CFSPO+1, 0x0000}, |
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{STK116_CFSPO+2, 0x0001}, |
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{STK116_CFSPO+3, 0x0000}, |
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|
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/* Frame end */ |
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{STK116_CFEPO, 0x05a0}, |
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{STK116_CFEPO+1, 0x0005}, |
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{STK116_CFEPO+2, 0x0121}, |
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{STK116_CFEPO+3, 0x0001}, |
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{0xffff, 0xffff} |
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}; |
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if (dev->norm & V4L2_STD_525_60) { |
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stk1160_dbg("registers to NTSC like standard\n"); |
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for (i = 0; std525[i].reg != 0xffff; i++) |
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stk1160_write_reg(dev, std525[i].reg, std525[i].val); |
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} else { |
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stk1160_dbg("registers to PAL like standard\n"); |
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for (i = 0; std625[i].reg != 0xffff; i++) |
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stk1160_write_reg(dev, std625[i].reg, std625[i].val); |
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} |
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} |
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static void stk1160_set_fmt(struct stk1160 *dev, |
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struct stk1160_decimate_ctrl *ctrl) |
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{ |
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u32 val = 0; |
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if (ctrl) { |
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/* |
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* Since the format is UYVY, the device must skip or send |
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* a number of rows/columns multiple of four. This way, the |
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* colour format is preserved. The STK1160_DEC_UNIT_SIZE bit |
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* does exactly this. |
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*/ |
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val |= STK1160_DEC_UNIT_SIZE; |
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val |= ctrl->col_en ? STK1160_H_DEC_EN : 0; |
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val |= ctrl->row_en ? STK1160_V_DEC_EN : 0; |
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val |= ctrl->col_mode == |
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STK1160_DECIMATE_MORE_THAN_HALF ? |
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STK1160_H_DEC_MODE : 0; |
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val |= ctrl->row_mode == |
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STK1160_DECIMATE_MORE_THAN_HALF ? |
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STK1160_V_DEC_MODE : 0; |
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|
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/* Horizontal count units */ |
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stk1160_write_reg(dev, STK1160_DMCTRL_H_UNITS, ctrl->col_n); |
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/* Vertical count units */ |
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stk1160_write_reg(dev, STK1160_DMCTRL_V_UNITS, ctrl->row_n); |
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stk1160_dbg("decimate 0x%x, column units %d, row units %d\n", |
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val, ctrl->col_n, ctrl->row_n); |
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} |
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/* Decimation control */ |
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stk1160_write_reg(dev, STK1160_DMCTRL, val); |
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} |
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/* |
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* Set a new alternate setting. |
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* Returns true is dev->max_pkt_size has changed, false otherwise. |
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*/ |
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static bool stk1160_set_alternate(struct stk1160 *dev) |
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{ |
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int i, prev_alt = dev->alt; |
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unsigned int min_pkt_size; |
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bool new_pkt_size; |
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/* |
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* If we don't set right alternate, |
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* then we will get a green screen with junk. |
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*/ |
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min_pkt_size = STK1160_MIN_PKT_SIZE; |
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for (i = 0; i < dev->num_alt; i++) { |
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/* stop when the selected alt setting offers enough bandwidth */ |
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if (dev->alt_max_pkt_size[i] >= min_pkt_size) { |
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dev->alt = i; |
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break; |
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/* |
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* otherwise make sure that we end up with the maximum bandwidth |
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* because the min_pkt_size equation might be wrong... |
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*/ |
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} else if (dev->alt_max_pkt_size[i] > |
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dev->alt_max_pkt_size[dev->alt]) |
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dev->alt = i; |
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} |
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stk1160_dbg("setting alternate %d\n", dev->alt); |
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if (dev->alt != prev_alt) { |
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stk1160_dbg("minimum isoc packet size: %u (alt=%d)\n", |
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min_pkt_size, dev->alt); |
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stk1160_dbg("setting alt %d with wMaxPacketSize=%u\n", |
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dev->alt, dev->alt_max_pkt_size[dev->alt]); |
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usb_set_interface(dev->udev, 0, dev->alt); |
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} |
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new_pkt_size = dev->max_pkt_size != dev->alt_max_pkt_size[dev->alt]; |
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dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; |
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return new_pkt_size; |
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} |
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static int stk1160_start_streaming(struct stk1160 *dev) |
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{ |
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bool new_pkt_size; |
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int rc = 0; |
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int i; |
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|
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/* Check device presence */ |
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if (!dev->udev) |
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return -ENODEV; |
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if (mutex_lock_interruptible(&dev->v4l_lock)) |
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return -ERESTARTSYS; |
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/* |
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* For some reason it is mandatory to set alternate *first* |
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* and only *then* initialize isoc urbs. |
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* Someone please explain me why ;) |
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*/ |
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new_pkt_size = stk1160_set_alternate(dev); |
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/* |
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* We (re)allocate isoc urbs if: |
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* there is no allocated isoc urbs, OR |
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* a new dev->max_pkt_size is detected |
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*/ |
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if (!dev->isoc_ctl.num_bufs || new_pkt_size) { |
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rc = stk1160_alloc_isoc(dev); |
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if (rc < 0) |
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goto out_stop_hw; |
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} |
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/* submit urbs and enables IRQ */ |
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for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { |
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rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL); |
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if (rc) { |
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stk1160_err("cannot submit urb[%d] (%d)\n", i, rc); |
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goto out_uninit; |
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} |
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} |
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/* Start saa711x */ |
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v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1); |
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dev->sequence = 0; |
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/* Start stk1160 */ |
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stk1160_write_reg(dev, STK1160_DCTRL, 0xb3); |
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stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); |
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stk1160_dbg("streaming started\n"); |
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mutex_unlock(&dev->v4l_lock); |
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return 0; |
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out_uninit: |
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stk1160_uninit_isoc(dev); |
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out_stop_hw: |
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usb_set_interface(dev->udev, 0, 0); |
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stk1160_clear_queue(dev); |
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mutex_unlock(&dev->v4l_lock); |
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return rc; |
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} |
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/* Must be called with v4l_lock hold */ |
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static void stk1160_stop_hw(struct stk1160 *dev) |
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{ |
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/* If the device is not physically present, there is nothing to do */ |
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if (!dev->udev) |
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return; |
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/* set alternate 0 */ |
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dev->alt = 0; |
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stk1160_dbg("setting alternate %d\n", dev->alt); |
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usb_set_interface(dev->udev, 0, 0); |
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/* Stop stk1160 */ |
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stk1160_write_reg(dev, STK1160_DCTRL, 0x00); |
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stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); |
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/* Stop saa711x */ |
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v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0); |
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} |
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static int stk1160_stop_streaming(struct stk1160 *dev) |
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{ |
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if (mutex_lock_interruptible(&dev->v4l_lock)) |
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return -ERESTARTSYS; |
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/* |
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* Once URBs are cancelled, the URB complete handler |
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* won't be running. This is required to safely release the |
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* current buffer (dev->isoc_ctl.buf). |
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*/ |
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stk1160_cancel_isoc(dev); |
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/* |
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* It is possible to keep buffers around using a module parameter. |
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* This is intended to avoid memory fragmentation. |
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*/ |
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if (!keep_buffers) |
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stk1160_free_isoc(dev); |
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stk1160_stop_hw(dev); |
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stk1160_clear_queue(dev); |
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stk1160_dbg("streaming stopped\n"); |
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mutex_unlock(&dev->v4l_lock); |
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return 0; |
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} |
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static const struct v4l2_file_operations stk1160_fops = { |
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.owner = THIS_MODULE, |
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.open = v4l2_fh_open, |
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.release = vb2_fop_release, |
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.read = vb2_fop_read, |
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.poll = vb2_fop_poll, |
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.mmap = vb2_fop_mmap, |
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.unlocked_ioctl = video_ioctl2, |
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}; |
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/* |
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* vidioc ioctls |
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*/ |
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static int vidioc_querycap(struct file *file, |
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void *priv, struct v4l2_capability *cap) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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strscpy(cap->driver, "stk1160", sizeof(cap->driver)); |
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strscpy(cap->card, "stk1160", sizeof(cap->card)); |
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usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); |
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return 0; |
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} |
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static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
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struct v4l2_fmtdesc *f) |
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{ |
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if (f->index != 0) |
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return -EINVAL; |
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f->pixelformat = format[f->index].fourcc; |
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return 0; |
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} |
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static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
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struct v4l2_format *f) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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f->fmt.pix.width = dev->width; |
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f->fmt.pix.height = dev->height; |
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f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
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f->fmt.pix.pixelformat = dev->fmt->fourcc; |
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f->fmt.pix.bytesperline = dev->width * 2; |
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f->fmt.pix.sizeimage = dev->height * f->fmt.pix.bytesperline; |
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f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
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return 0; |
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} |
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static int stk1160_try_fmt(struct stk1160 *dev, struct v4l2_format *f, |
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struct stk1160_decimate_ctrl *ctrl) |
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{ |
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unsigned int width, height; |
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unsigned int base_width, base_height; |
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unsigned int col_n, row_n; |
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enum stk1160_decimate_mode col_mode, row_mode; |
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bool col_en, row_en; |
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base_width = 720; |
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base_height = (dev->norm & V4L2_STD_525_60) ? 480 : 576; |
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/* Minimum width and height is 5% the frame size */ |
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width = clamp_t(unsigned int, f->fmt.pix.width, |
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base_width / 20, base_width); |
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height = clamp_t(unsigned int, f->fmt.pix.height, |
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base_height / 20, base_height); |
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/* Let's set default no decimation values */ |
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col_n = 0; |
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row_n = 0; |
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col_en = false; |
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row_en = false; |
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f->fmt.pix.width = base_width; |
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f->fmt.pix.height = base_height; |
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row_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
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col_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
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if (width < base_width && width > base_width / 2) { |
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/* |
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* The device will send count units for each |
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* unit skipped. This means count unit is: |
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* |
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* n = width / (frame width - width) |
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* |
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* And the width is: |
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* |
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* width = (n / n + 1) * frame width |
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*/ |
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col_n = div_round_integer(width, base_width - width); |
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if (col_n > 0 && col_n <= 255) { |
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col_en = true; |
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col_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
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f->fmt.pix.width = (base_width * col_n) / (col_n + 1); |
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} |
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} else if (width <= base_width / 2) { |
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/* |
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* The device will skip count units for each |
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* unit sent. This means count is: |
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* |
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* n = (frame width / width) - 1 |
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* |
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* And the width is: |
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* |
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* width = frame width / (n + 1) |
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*/ |
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col_n = div_round_integer(base_width, width) - 1; |
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if (col_n > 0 && col_n <= 255) { |
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col_en = true; |
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col_mode = STK1160_DECIMATE_MORE_THAN_HALF; |
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f->fmt.pix.width = base_width / (col_n + 1); |
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} |
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} |
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if (height < base_height && height > base_height / 2) { |
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row_n = div_round_integer(height, base_height - height); |
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if (row_n > 0 && row_n <= 255) { |
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row_en = true; |
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row_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
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f->fmt.pix.height = (base_height * row_n) / (row_n + 1); |
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} |
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|
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} else if (height <= base_height / 2) { |
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row_n = div_round_integer(base_height, height) - 1; |
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if (row_n > 0 && row_n <= 255) { |
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row_en = true; |
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row_mode = STK1160_DECIMATE_MORE_THAN_HALF; |
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f->fmt.pix.height = base_height / (row_n + 1); |
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} |
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} |
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f->fmt.pix.pixelformat = dev->fmt->fourcc; |
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f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
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f->fmt.pix.bytesperline = f->fmt.pix.width * 2; |
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f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
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f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
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if (ctrl) { |
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ctrl->col_en = col_en; |
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ctrl->col_n = col_n; |
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ctrl->col_mode = col_mode; |
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ctrl->row_en = row_en; |
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ctrl->row_n = row_n; |
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ctrl->row_mode = row_mode; |
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} |
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stk1160_dbg("width %d, height %d\n", |
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f->fmt.pix.width, f->fmt.pix.height); |
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return 0; |
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} |
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static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, |
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struct v4l2_format *f) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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return stk1160_try_fmt(dev, f, NULL); |
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} |
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static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
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struct v4l2_format *f) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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struct vb2_queue *q = &dev->vb_vidq; |
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struct stk1160_decimate_ctrl ctrl; |
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int rc; |
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|
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if (vb2_is_busy(q)) |
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return -EBUSY; |
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rc = stk1160_try_fmt(dev, f, &ctrl); |
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if (rc < 0) |
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return rc; |
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dev->width = f->fmt.pix.width; |
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dev->height = f->fmt.pix.height; |
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stk1160_set_fmt(dev, &ctrl); |
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|
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return 0; |
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} |
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static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); |
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return 0; |
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} |
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static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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|
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*norm = dev->norm; |
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return 0; |
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} |
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|
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static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) |
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{ |
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struct stk1160 *dev = video_drvdata(file); |
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struct vb2_queue *q = &dev->vb_vidq; |
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|
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if (dev->norm == norm) |
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return 0; |
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|
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if (vb2_is_busy(q)) |
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return -EBUSY; |
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|
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/* Check device presence */ |
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if (!dev->udev) |
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return -ENODEV; |
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|
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/* We need to set this now, before we call stk1160_set_std */ |
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dev->width = 720; |
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dev->height = (norm & V4L2_STD_525_60) ? 480 : 576; |
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dev->norm = norm; |
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|
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stk1160_set_std(dev); |
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|
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/* Calling with NULL disables frame decimation */ |
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stk1160_set_fmt(dev, NULL); |
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|
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v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
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dev->norm); |
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|
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return 0; |
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} |
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|
|
|
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static int vidioc_enum_input(struct file *file, void *priv, |
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struct v4l2_input *i) |
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{ |
|
struct stk1160 *dev = video_drvdata(file); |
|
|
|
if (i->index > STK1160_MAX_INPUT) |
|
return -EINVAL; |
|
|
|
/* S-Video special handling */ |
|
if (i->index == STK1160_SVIDEO_INPUT) |
|
sprintf(i->name, "S-Video"); |
|
else |
|
sprintf(i->name, "Composite%d", i->index); |
|
|
|
i->type = V4L2_INPUT_TYPE_CAMERA; |
|
i->std = dev->vdev.tvnorms; |
|
return 0; |
|
} |
|
|
|
static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
|
{ |
|
struct stk1160 *dev = video_drvdata(file); |
|
*i = dev->ctl_input; |
|
return 0; |
|
} |
|
|
|
static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
|
{ |
|
struct stk1160 *dev = video_drvdata(file); |
|
|
|
if (i > STK1160_MAX_INPUT) |
|
return -EINVAL; |
|
|
|
dev->ctl_input = i; |
|
|
|
stk1160_select_input(dev); |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
static int vidioc_g_register(struct file *file, void *priv, |
|
struct v4l2_dbg_register *reg) |
|
{ |
|
struct stk1160 *dev = video_drvdata(file); |
|
int rc; |
|
u8 val; |
|
|
|
/* Match host */ |
|
rc = stk1160_read_reg(dev, reg->reg, &val); |
|
reg->val = val; |
|
reg->size = 1; |
|
|
|
return rc; |
|
} |
|
|
|
static int vidioc_s_register(struct file *file, void *priv, |
|
const struct v4l2_dbg_register *reg) |
|
{ |
|
struct stk1160 *dev = video_drvdata(file); |
|
|
|
/* Match host */ |
|
return stk1160_write_reg(dev, reg->reg, reg->val); |
|
} |
|
#endif |
|
|
|
static const struct v4l2_ioctl_ops stk1160_ioctl_ops = { |
|
.vidioc_querycap = vidioc_querycap, |
|
.vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
|
.vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
|
.vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
|
.vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
|
.vidioc_querystd = vidioc_querystd, |
|
.vidioc_g_std = vidioc_g_std, |
|
.vidioc_s_std = vidioc_s_std, |
|
.vidioc_enum_input = vidioc_enum_input, |
|
.vidioc_g_input = vidioc_g_input, |
|
.vidioc_s_input = vidioc_s_input, |
|
|
|
/* vb2 takes care of these */ |
|
.vidioc_reqbufs = vb2_ioctl_reqbufs, |
|
.vidioc_querybuf = vb2_ioctl_querybuf, |
|
.vidioc_qbuf = vb2_ioctl_qbuf, |
|
.vidioc_dqbuf = vb2_ioctl_dqbuf, |
|
.vidioc_streamon = vb2_ioctl_streamon, |
|
.vidioc_streamoff = vb2_ioctl_streamoff, |
|
.vidioc_expbuf = vb2_ioctl_expbuf, |
|
|
|
.vidioc_log_status = v4l2_ctrl_log_status, |
|
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
|
.vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
|
|
|
#ifdef CONFIG_VIDEO_ADV_DEBUG |
|
.vidioc_g_register = vidioc_g_register, |
|
.vidioc_s_register = vidioc_s_register, |
|
#endif |
|
}; |
|
|
|
/********************************************************************/ |
|
|
|
/* |
|
* Videobuf2 operations |
|
*/ |
|
static int queue_setup(struct vb2_queue *vq, |
|
unsigned int *nbuffers, unsigned int *nplanes, |
|
unsigned int sizes[], struct device *alloc_devs[]) |
|
{ |
|
struct stk1160 *dev = vb2_get_drv_priv(vq); |
|
unsigned long size; |
|
|
|
size = dev->width * dev->height * 2; |
|
|
|
/* |
|
* Here we can change the number of buffers being requested. |
|
* So, we set a minimum and a maximum like this: |
|
*/ |
|
*nbuffers = clamp_t(unsigned int, *nbuffers, |
|
STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS); |
|
|
|
if (*nplanes) |
|
return sizes[0] < size ? -EINVAL : 0; |
|
|
|
/* This means a packed colorformat */ |
|
*nplanes = 1; |
|
|
|
sizes[0] = size; |
|
|
|
stk1160_dbg("%s: buffer count %d, each %ld bytes\n", |
|
__func__, *nbuffers, size); |
|
|
|
return 0; |
|
} |
|
|
|
static void buffer_queue(struct vb2_buffer *vb) |
|
{ |
|
unsigned long flags; |
|
struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue); |
|
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
|
struct stk1160_buffer *buf = |
|
container_of(vbuf, struct stk1160_buffer, vb); |
|
|
|
spin_lock_irqsave(&dev->buf_lock, flags); |
|
if (!dev->udev) { |
|
/* |
|
* If the device is disconnected return the buffer to userspace |
|
* directly. The next QBUF call will fail with -ENODEV. |
|
*/ |
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
|
} else { |
|
|
|
buf->mem = vb2_plane_vaddr(vb, 0); |
|
buf->length = vb2_plane_size(vb, 0); |
|
buf->bytesused = 0; |
|
buf->pos = 0; |
|
|
|
/* |
|
* If buffer length is less from expected then we return |
|
* the buffer to userspace directly. |
|
*/ |
|
if (buf->length < dev->width * dev->height * 2) |
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
|
else |
|
list_add_tail(&buf->list, &dev->avail_bufs); |
|
|
|
} |
|
spin_unlock_irqrestore(&dev->buf_lock, flags); |
|
} |
|
|
|
static int start_streaming(struct vb2_queue *vq, unsigned int count) |
|
{ |
|
struct stk1160 *dev = vb2_get_drv_priv(vq); |
|
return stk1160_start_streaming(dev); |
|
} |
|
|
|
/* abort streaming and wait for last buffer */ |
|
static void stop_streaming(struct vb2_queue *vq) |
|
{ |
|
struct stk1160 *dev = vb2_get_drv_priv(vq); |
|
stk1160_stop_streaming(dev); |
|
} |
|
|
|
static const struct vb2_ops stk1160_video_qops = { |
|
.queue_setup = queue_setup, |
|
.buf_queue = buffer_queue, |
|
.start_streaming = start_streaming, |
|
.stop_streaming = stop_streaming, |
|
.wait_prepare = vb2_ops_wait_prepare, |
|
.wait_finish = vb2_ops_wait_finish, |
|
}; |
|
|
|
static const struct video_device v4l_template = { |
|
.name = "stk1160", |
|
.tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50, |
|
.fops = &stk1160_fops, |
|
.ioctl_ops = &stk1160_ioctl_ops, |
|
.release = video_device_release_empty, |
|
}; |
|
|
|
/********************************************************************/ |
|
|
|
/* Must be called with both v4l_lock and vb_queue_lock hold */ |
|
void stk1160_clear_queue(struct stk1160 *dev) |
|
{ |
|
struct stk1160_buffer *buf; |
|
unsigned long flags; |
|
|
|
/* Release all active buffers */ |
|
spin_lock_irqsave(&dev->buf_lock, flags); |
|
while (!list_empty(&dev->avail_bufs)) { |
|
buf = list_first_entry(&dev->avail_bufs, |
|
struct stk1160_buffer, list); |
|
list_del(&buf->list); |
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
|
stk1160_dbg("buffer [%p/%d] aborted\n", |
|
buf, buf->vb.vb2_buf.index); |
|
} |
|
|
|
/* It's important to release the current buffer */ |
|
if (dev->isoc_ctl.buf) { |
|
buf = dev->isoc_ctl.buf; |
|
dev->isoc_ctl.buf = NULL; |
|
|
|
vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
|
stk1160_dbg("buffer [%p/%d] aborted\n", |
|
buf, buf->vb.vb2_buf.index); |
|
} |
|
spin_unlock_irqrestore(&dev->buf_lock, flags); |
|
} |
|
|
|
int stk1160_vb2_setup(struct stk1160 *dev) |
|
{ |
|
int rc; |
|
struct vb2_queue *q; |
|
|
|
q = &dev->vb_vidq; |
|
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
|
q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; |
|
q->drv_priv = dev; |
|
q->buf_struct_size = sizeof(struct stk1160_buffer); |
|
q->ops = &stk1160_video_qops; |
|
q->mem_ops = &vb2_vmalloc_memops; |
|
q->lock = &dev->vb_queue_lock; |
|
q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
|
|
|
rc = vb2_queue_init(q); |
|
if (rc < 0) |
|
return rc; |
|
|
|
/* initialize video dma queue */ |
|
INIT_LIST_HEAD(&dev->avail_bufs); |
|
|
|
return 0; |
|
} |
|
|
|
int stk1160_video_register(struct stk1160 *dev) |
|
{ |
|
int rc; |
|
|
|
/* Initialize video_device with a template structure */ |
|
dev->vdev = v4l_template; |
|
dev->vdev.queue = &dev->vb_vidq; |
|
|
|
/* |
|
* Provide mutexes for v4l2 core and for videobuf2 queue. |
|
* It will be used to protect *only* v4l2 ioctls. |
|
*/ |
|
dev->vdev.lock = &dev->v4l_lock; |
|
|
|
/* This will be used to set video_device parent */ |
|
dev->vdev.v4l2_dev = &dev->v4l2_dev; |
|
dev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING | |
|
V4L2_CAP_READWRITE; |
|
|
|
/* NTSC is default */ |
|
dev->norm = V4L2_STD_NTSC_M; |
|
dev->width = 720; |
|
dev->height = 480; |
|
|
|
/* set default format */ |
|
dev->fmt = &format[0]; |
|
stk1160_set_std(dev); |
|
|
|
v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
|
dev->norm); |
|
|
|
video_set_drvdata(&dev->vdev, dev); |
|
rc = video_register_device(&dev->vdev, VFL_TYPE_VIDEO, -1); |
|
if (rc < 0) { |
|
stk1160_err("video_register_device failed (%d)\n", rc); |
|
return rc; |
|
} |
|
|
|
v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n", |
|
video_device_node_name(&dev->vdev)); |
|
|
|
return 0; |
|
}
|
|
|