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557 lines
14 KiB
557 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* vpx3220a, vpx3216b & vpx3214c video decoder driver version 0.0.1 |
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* |
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* Copyright (C) 2001 Laurent Pinchart <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/types.h> |
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#include <linux/slab.h> |
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#include <linux/uaccess.h> |
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#include <linux/i2c.h> |
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#include <linux/videodev2.h> |
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#include <media/v4l2-device.h> |
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#include <media/v4l2-ctrls.h> |
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MODULE_DESCRIPTION("vpx3220a/vpx3216b/vpx3214c video decoder driver"); |
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MODULE_AUTHOR("Laurent Pinchart"); |
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MODULE_LICENSE("GPL"); |
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static int debug; |
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module_param(debug, int, 0); |
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MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
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#define VPX_TIMEOUT_COUNT 10 |
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/* ----------------------------------------------------------------------- */ |
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struct vpx3220 { |
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struct v4l2_subdev sd; |
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struct v4l2_ctrl_handler hdl; |
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unsigned char reg[255]; |
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v4l2_std_id norm; |
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int input; |
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int enable; |
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}; |
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static inline struct vpx3220 *to_vpx3220(struct v4l2_subdev *sd) |
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{ |
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return container_of(sd, struct vpx3220, sd); |
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} |
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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
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{ |
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return &container_of(ctrl->handler, struct vpx3220, hdl)->sd; |
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} |
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static char *inputs[] = { "internal", "composite", "svideo" }; |
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/* ----------------------------------------------------------------------- */ |
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static inline int vpx3220_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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struct vpx3220 *decoder = i2c_get_clientdata(client); |
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decoder->reg[reg] = value; |
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return i2c_smbus_write_byte_data(client, reg, value); |
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} |
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static inline int vpx3220_read(struct v4l2_subdev *sd, u8 reg) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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return i2c_smbus_read_byte_data(client, reg); |
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} |
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static int vpx3220_fp_status(struct v4l2_subdev *sd) |
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{ |
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unsigned char status; |
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unsigned int i; |
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for (i = 0; i < VPX_TIMEOUT_COUNT; i++) { |
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status = vpx3220_read(sd, 0x29); |
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if (!(status & 4)) |
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return 0; |
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udelay(10); |
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if (need_resched()) |
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cond_resched(); |
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} |
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return -1; |
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} |
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static int vpx3220_fp_write(struct v4l2_subdev *sd, u8 fpaddr, u16 data) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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/* Write the 16-bit address to the FPWR register */ |
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if (i2c_smbus_write_word_data(client, 0x27, swab16(fpaddr)) == -1) { |
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v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); |
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return -1; |
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} |
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if (vpx3220_fp_status(sd) < 0) |
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return -1; |
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/* Write the 16-bit data to the FPDAT register */ |
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if (i2c_smbus_write_word_data(client, 0x28, swab16(data)) == -1) { |
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v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); |
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return -1; |
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} |
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return 0; |
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} |
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static int vpx3220_fp_read(struct v4l2_subdev *sd, u16 fpaddr) |
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{ |
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struct i2c_client *client = v4l2_get_subdevdata(sd); |
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s16 data; |
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/* Write the 16-bit address to the FPRD register */ |
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if (i2c_smbus_write_word_data(client, 0x26, swab16(fpaddr)) == -1) { |
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v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); |
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return -1; |
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} |
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if (vpx3220_fp_status(sd) < 0) |
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return -1; |
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/* Read the 16-bit data from the FPDAT register */ |
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data = i2c_smbus_read_word_data(client, 0x28); |
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if (data == -1) { |
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v4l2_dbg(1, debug, sd, "%s: failed\n", __func__); |
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return -1; |
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} |
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return swab16(data); |
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} |
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static int vpx3220_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len) |
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{ |
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u8 reg; |
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int ret = -1; |
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while (len >= 2) { |
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reg = *data++; |
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ret = vpx3220_write(sd, reg, *data++); |
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if (ret < 0) |
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break; |
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len -= 2; |
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} |
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return ret; |
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} |
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static int vpx3220_write_fp_block(struct v4l2_subdev *sd, |
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const u16 *data, unsigned int len) |
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{ |
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u8 reg; |
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int ret = 0; |
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while (len > 1) { |
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reg = *data++; |
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ret |= vpx3220_fp_write(sd, reg, *data++); |
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len -= 2; |
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} |
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return ret; |
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} |
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/* ---------------------------------------------------------------------- */ |
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static const unsigned short init_ntsc[] = { |
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0x1c, 0x00, /* NTSC tint angle */ |
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0x88, 17, /* Window 1 vertical */ |
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0x89, 240, /* Vertical lines in */ |
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0x8a, 240, /* Vertical lines out */ |
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0x8b, 000, /* Horizontal begin */ |
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0x8c, 640, /* Horizontal length */ |
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0x8d, 640, /* Number of pixels */ |
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0x8f, 0xc00, /* Disable window 2 */ |
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0xf0, 0x73, /* 13.5 MHz transport, Forced |
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* mode, latch windows */ |
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0xf2, 0x13, /* NTSC M, composite input */ |
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0xe7, 0x1e1, /* Enable vertical standard |
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* locking @ 240 lines */ |
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}; |
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static const unsigned short init_pal[] = { |
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0x88, 23, /* Window 1 vertical begin */ |
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0x89, 288, /* Vertical lines in (16 lines |
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* skipped by the VFE) */ |
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0x8a, 288, /* Vertical lines out (16 lines |
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* skipped by the VFE) */ |
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0x8b, 16, /* Horizontal begin */ |
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0x8c, 768, /* Horizontal length */ |
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0x8d, 784, /* Number of pixels |
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* Must be >= Horizontal begin + Horizontal length */ |
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0x8f, 0xc00, /* Disable window 2 */ |
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0xf0, 0x77, /* 13.5 MHz transport, Forced |
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* mode, latch windows */ |
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0xf2, 0x3d1, /* PAL B,G,H,I, composite input */ |
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0xe7, 0x241, /* PAL/SECAM set to 288 lines */ |
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}; |
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static const unsigned short init_secam[] = { |
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0x88, 23, /* Window 1 vertical begin */ |
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0x89, 288, /* Vertical lines in (16 lines |
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* skipped by the VFE) */ |
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0x8a, 288, /* Vertical lines out (16 lines |
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* skipped by the VFE) */ |
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0x8b, 16, /* Horizontal begin */ |
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0x8c, 768, /* Horizontal length */ |
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0x8d, 784, /* Number of pixels |
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* Must be >= Horizontal begin + Horizontal length */ |
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0x8f, 0xc00, /* Disable window 2 */ |
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0xf0, 0x77, /* 13.5 MHz transport, Forced |
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* mode, latch windows */ |
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0xf2, 0x3d5, /* SECAM, composite input */ |
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0xe7, 0x241, /* PAL/SECAM set to 288 lines */ |
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}; |
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static const unsigned char init_common[] = { |
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0xf2, 0x00, /* Disable all outputs */ |
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0x33, 0x0d, /* Luma : VIN2, Chroma : CIN |
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* (clamp off) */ |
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0xd8, 0xa8, /* HREF/VREF active high, VREF |
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* pulse = 2, Odd/Even flag */ |
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0x20, 0x03, /* IF compensation 0dB/oct */ |
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0xe0, 0xff, /* Open up all comparators */ |
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0xe1, 0x00, |
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0xe2, 0x7f, |
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0xe3, 0x80, |
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0xe4, 0x7f, |
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0xe5, 0x80, |
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0xe6, 0x00, /* Brightness set to 0 */ |
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0xe7, 0xe0, /* Contrast to 1.0, noise shaping |
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* 10 to 8 2-bit error diffusion */ |
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0xe8, 0xf8, /* YUV422, CbCr binary offset, |
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* ... (p.32) */ |
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0xea, 0x18, /* LLC2 connected, output FIFO |
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* reset with VACTintern */ |
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0xf0, 0x8a, /* Half full level to 10, bus |
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* shuffler [7:0, 23:16, 15:8] */ |
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0xf1, 0x18, /* Single clock, sync mode, no |
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* FE delay, no HLEN counter */ |
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0xf8, 0x12, /* Port A, PIXCLK, HF# & FE# |
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* strength to 2 */ |
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0xf9, 0x24, /* Port B, HREF, VREF, PREF & |
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* ALPHA strength to 4 */ |
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}; |
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static const unsigned short init_fp[] = { |
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0x59, 0, |
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0xa0, 2070, /* ACC reference */ |
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0xa3, 0, |
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0xa4, 0, |
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0xa8, 30, |
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0xb2, 768, |
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0xbe, 27, |
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0x58, 0, |
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0x26, 0, |
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0x4b, 0x298, /* PLL gain */ |
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}; |
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static int vpx3220_init(struct v4l2_subdev *sd, u32 val) |
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{ |
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struct vpx3220 *decoder = to_vpx3220(sd); |
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vpx3220_write_block(sd, init_common, sizeof(init_common)); |
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vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1); |
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if (decoder->norm & V4L2_STD_NTSC) |
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vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1); |
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else if (decoder->norm & V4L2_STD_PAL) |
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vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); |
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else if (decoder->norm & V4L2_STD_SECAM) |
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vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1); |
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else |
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vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); |
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return 0; |
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} |
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static int vpx3220_status(struct v4l2_subdev *sd, u32 *pstatus, v4l2_std_id *pstd) |
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{ |
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int res = V4L2_IN_ST_NO_SIGNAL, status; |
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v4l2_std_id std = pstd ? *pstd : V4L2_STD_ALL; |
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status = vpx3220_fp_read(sd, 0x0f3); |
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v4l2_dbg(1, debug, sd, "status: 0x%04x\n", status); |
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if (status < 0) |
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return status; |
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if ((status & 0x20) == 0) { |
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res = 0; |
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switch (status & 0x18) { |
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case 0x00: |
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case 0x10: |
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case 0x14: |
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case 0x18: |
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std &= V4L2_STD_PAL; |
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break; |
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case 0x08: |
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std &= V4L2_STD_SECAM; |
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break; |
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case 0x04: |
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case 0x0c: |
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case 0x1c: |
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std &= V4L2_STD_NTSC; |
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break; |
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} |
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} else { |
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std = V4L2_STD_UNKNOWN; |
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} |
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if (pstd) |
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*pstd = std; |
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if (pstatus) |
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*pstatus = res; |
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return 0; |
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} |
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static int vpx3220_querystd(struct v4l2_subdev *sd, v4l2_std_id *std) |
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{ |
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v4l2_dbg(1, debug, sd, "querystd\n"); |
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return vpx3220_status(sd, NULL, std); |
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} |
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static int vpx3220_g_input_status(struct v4l2_subdev *sd, u32 *status) |
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{ |
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v4l2_dbg(1, debug, sd, "g_input_status\n"); |
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return vpx3220_status(sd, status, NULL); |
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} |
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static int vpx3220_s_std(struct v4l2_subdev *sd, v4l2_std_id std) |
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{ |
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struct vpx3220 *decoder = to_vpx3220(sd); |
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int temp_input; |
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/* Here we back up the input selection because it gets |
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overwritten when we fill the registers with the |
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chosen video norm */ |
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temp_input = vpx3220_fp_read(sd, 0xf2); |
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v4l2_dbg(1, debug, sd, "s_std %llx\n", (unsigned long long)std); |
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if (std & V4L2_STD_NTSC) { |
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vpx3220_write_fp_block(sd, init_ntsc, sizeof(init_ntsc) >> 1); |
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v4l2_dbg(1, debug, sd, "norm switched to NTSC\n"); |
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} else if (std & V4L2_STD_PAL) { |
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vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); |
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v4l2_dbg(1, debug, sd, "norm switched to PAL\n"); |
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} else if (std & V4L2_STD_SECAM) { |
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vpx3220_write_fp_block(sd, init_secam, sizeof(init_secam) >> 1); |
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v4l2_dbg(1, debug, sd, "norm switched to SECAM\n"); |
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} else { |
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return -EINVAL; |
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} |
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decoder->norm = std; |
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/* And here we set the backed up video input again */ |
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vpx3220_fp_write(sd, 0xf2, temp_input | 0x0010); |
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udelay(10); |
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return 0; |
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} |
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static int vpx3220_s_routing(struct v4l2_subdev *sd, |
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u32 input, u32 output, u32 config) |
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{ |
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int data; |
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/* RJ: input = 0: ST8 (PCTV) input |
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input = 1: COMPOSITE input |
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input = 2: SVHS input */ |
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static const int input_vals[3][2] = { |
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{0x0c, 0}, |
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{0x0d, 0}, |
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{0x0e, 1} |
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}; |
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if (input > 2) |
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return -EINVAL; |
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v4l2_dbg(1, debug, sd, "input switched to %s\n", inputs[input]); |
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vpx3220_write(sd, 0x33, input_vals[input][0]); |
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data = vpx3220_fp_read(sd, 0xf2) & ~(0x0020); |
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if (data < 0) |
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return data; |
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/* 0x0010 is required to latch the setting */ |
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vpx3220_fp_write(sd, 0xf2, |
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data | (input_vals[input][1] << 5) | 0x0010); |
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udelay(10); |
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return 0; |
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} |
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static int vpx3220_s_stream(struct v4l2_subdev *sd, int enable) |
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{ |
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v4l2_dbg(1, debug, sd, "s_stream %s\n", enable ? "on" : "off"); |
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vpx3220_write(sd, 0xf2, (enable ? 0x1b : 0x00)); |
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return 0; |
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} |
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static int vpx3220_s_ctrl(struct v4l2_ctrl *ctrl) |
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{ |
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struct v4l2_subdev *sd = to_sd(ctrl); |
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switch (ctrl->id) { |
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case V4L2_CID_BRIGHTNESS: |
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vpx3220_write(sd, 0xe6, ctrl->val); |
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return 0; |
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case V4L2_CID_CONTRAST: |
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/* Bit 7 and 8 is for noise shaping */ |
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vpx3220_write(sd, 0xe7, ctrl->val + 192); |
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return 0; |
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case V4L2_CID_SATURATION: |
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vpx3220_fp_write(sd, 0xa0, ctrl->val); |
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return 0; |
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case V4L2_CID_HUE: |
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vpx3220_fp_write(sd, 0x1c, ctrl->val); |
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return 0; |
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} |
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return -EINVAL; |
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} |
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/* ----------------------------------------------------------------------- */ |
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static const struct v4l2_ctrl_ops vpx3220_ctrl_ops = { |
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.s_ctrl = vpx3220_s_ctrl, |
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}; |
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static const struct v4l2_subdev_core_ops vpx3220_core_ops = { |
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.init = vpx3220_init, |
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}; |
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static const struct v4l2_subdev_video_ops vpx3220_video_ops = { |
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.s_std = vpx3220_s_std, |
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.s_routing = vpx3220_s_routing, |
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.s_stream = vpx3220_s_stream, |
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.querystd = vpx3220_querystd, |
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.g_input_status = vpx3220_g_input_status, |
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}; |
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static const struct v4l2_subdev_ops vpx3220_ops = { |
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.core = &vpx3220_core_ops, |
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.video = &vpx3220_video_ops, |
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}; |
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/* ----------------------------------------------------------------------- |
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* Client management code |
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*/ |
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static int vpx3220_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct vpx3220 *decoder; |
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struct v4l2_subdev *sd; |
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const char *name = NULL; |
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u8 ver; |
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u16 pn; |
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/* Check if the adapter supports the needed features */ |
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if (!i2c_check_functionality(client->adapter, |
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I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA)) |
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return -ENODEV; |
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decoder = devm_kzalloc(&client->dev, sizeof(*decoder), GFP_KERNEL); |
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if (decoder == NULL) |
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return -ENOMEM; |
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sd = &decoder->sd; |
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v4l2_i2c_subdev_init(sd, client, &vpx3220_ops); |
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decoder->norm = V4L2_STD_PAL; |
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decoder->input = 0; |
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decoder->enable = 1; |
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v4l2_ctrl_handler_init(&decoder->hdl, 4); |
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v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, |
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V4L2_CID_BRIGHTNESS, -128, 127, 1, 0); |
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v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, |
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V4L2_CID_CONTRAST, 0, 63, 1, 32); |
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v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, |
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V4L2_CID_SATURATION, 0, 4095, 1, 2048); |
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v4l2_ctrl_new_std(&decoder->hdl, &vpx3220_ctrl_ops, |
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V4L2_CID_HUE, -512, 511, 1, 0); |
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sd->ctrl_handler = &decoder->hdl; |
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if (decoder->hdl.error) { |
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int err = decoder->hdl.error; |
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v4l2_ctrl_handler_free(&decoder->hdl); |
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return err; |
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} |
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v4l2_ctrl_handler_setup(&decoder->hdl); |
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ver = i2c_smbus_read_byte_data(client, 0x00); |
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pn = (i2c_smbus_read_byte_data(client, 0x02) << 8) + |
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i2c_smbus_read_byte_data(client, 0x01); |
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if (ver == 0xec) { |
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switch (pn) { |
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case 0x4680: |
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name = "vpx3220a"; |
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break; |
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case 0x4260: |
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name = "vpx3216b"; |
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break; |
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case 0x4280: |
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name = "vpx3214c"; |
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break; |
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} |
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} |
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if (name) |
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v4l2_info(sd, "%s found @ 0x%x (%s)\n", name, |
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client->addr << 1, client->adapter->name); |
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else |
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v4l2_info(sd, "chip (%02x:%04x) found @ 0x%x (%s)\n", |
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ver, pn, client->addr << 1, client->adapter->name); |
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vpx3220_write_block(sd, init_common, sizeof(init_common)); |
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vpx3220_write_fp_block(sd, init_fp, sizeof(init_fp) >> 1); |
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/* Default to PAL */ |
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vpx3220_write_fp_block(sd, init_pal, sizeof(init_pal) >> 1); |
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return 0; |
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} |
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static int vpx3220_remove(struct i2c_client *client) |
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{ |
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struct v4l2_subdev *sd = i2c_get_clientdata(client); |
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struct vpx3220 *decoder = to_vpx3220(sd); |
|
|
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v4l2_device_unregister_subdev(sd); |
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v4l2_ctrl_handler_free(&decoder->hdl); |
|
|
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return 0; |
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} |
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|
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static const struct i2c_device_id vpx3220_id[] = { |
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{ "vpx3220a", 0 }, |
|
{ "vpx3216b", 0 }, |
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{ "vpx3214c", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, vpx3220_id); |
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|
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static struct i2c_driver vpx3220_driver = { |
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.driver = { |
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.name = "vpx3220", |
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}, |
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.probe = vpx3220_probe, |
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.remove = vpx3220_remove, |
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.id_table = vpx3220_id, |
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}; |
|
|
|
module_i2c_driver(vpx3220_driver);
|
|
|