/* * saa7127 - Philips SAA7127/SAA7129 video encoder driver * * Copyright (C) 2003 Roy Bulter <rbulter@hetnet.nl> * * Based on SAA7126 video encoder driver by Gillem & Andreas Oberritter * * Copyright (C) 2000-2001 Gillem <htoa@gmx.net> * Copyright (C) 2002 Andreas Oberritter <obi@saftware.de> * * Based on Stadis 4:2:2 MPEG-2 Decoder Driver by Nathan Laredo * * Copyright (C) 1999 Nathan Laredo <laredo@gnu.org> * * This driver is designed for the Hauppauge 250/350 Linux driver * from the ivtv Project * * Copyright (C) 2003 Kevin Thayer <nufan_wfk@yahoo.com> * * Dual output support: * Copyright (C) 2004 Eric Varsanyi * * NTSC Tuning and 7.5 IRE Setup * Copyright (C) 2004 Chris Kennedy <c@groovy.org> * * VBI additions & cleanup: * Copyright (C) 2004, 2005 Hans Verkuil <hverkuil@xs4all.nl> * * Note: the saa7126 is identical to the saa7127, and the saa7128 is * identical to the saa7129, except that the saa7126 and saa7128 have * macrovision anti-taping support. This driver will almost certainly * work find for those chips, except of course for the missing anti-taping * support. * * 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/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <media/v4l2-common.h> #include <media/v4l2-chip-ident.h> #include <media/v4l2-i2c-drv.h> #include <media/saa7127.h> static int debug; static int test_image; MODULE_DESCRIPTION("Philips SAA7127/9 video encoder driver"); MODULE_AUTHOR("Kevin Thayer, Chris Kennedy, Hans Verkuil"); MODULE_LICENSE("GPL"); module_param(debug, int, 0644); module_param(test_image, int, 0644); MODULE_PARM_DESC(debug, "debug level (0-2)"); MODULE_PARM_DESC(test_image, "test_image (0-1)"); /* * SAA7127 registers */ #define SAA7127_REG_STATUS 0x00 #define SAA7127_REG_WIDESCREEN_CONFIG 0x26 #define SAA7127_REG_WIDESCREEN_ENABLE 0x27 #define SAA7127_REG_BURST_START 0x28 #define SAA7127_REG_BURST_END 0x29 #define SAA7127_REG_COPYGEN_0 0x2a #define SAA7127_REG_COPYGEN_1 0x2b #define SAA7127_REG_COPYGEN_2 0x2c #define SAA7127_REG_OUTPUT_PORT_CONTROL 0x2d #define SAA7127_REG_GAIN_LUMINANCE_RGB 0x38 #define SAA7127_REG_GAIN_COLORDIFF_RGB 0x39 #define SAA7127_REG_INPUT_PORT_CONTROL_1 0x3a #define SAA7129_REG_FADE_KEY_COL2 0x4f #define SAA7127_REG_CHROMA_PHASE 0x5a #define SAA7127_REG_GAINU 0x5b #define SAA7127_REG_GAINV 0x5c #define SAA7127_REG_BLACK_LEVEL 0x5d #define SAA7127_REG_BLANKING_LEVEL 0x5e #define SAA7127_REG_VBI_BLANKING 0x5f #define SAA7127_REG_DAC_CONTROL 0x61 #define SAA7127_REG_BURST_AMP 0x62 #define SAA7127_REG_SUBC3 0x63 #define SAA7127_REG_SUBC2 0x64 #define SAA7127_REG_SUBC1 0x65 #define SAA7127_REG_SUBC0 0x66 #define SAA7127_REG_LINE_21_ODD_0 0x67 #define SAA7127_REG_LINE_21_ODD_1 0x68 #define SAA7127_REG_LINE_21_EVEN_0 0x69 #define SAA7127_REG_LINE_21_EVEN_1 0x6a #define SAA7127_REG_RCV_PORT_CONTROL 0x6b #define SAA7127_REG_VTRIG 0x6c #define SAA7127_REG_HTRIG_HI 0x6d #define SAA7127_REG_MULTI 0x6e #define SAA7127_REG_CLOSED_CAPTION 0x6f #define SAA7127_REG_RCV2_OUTPUT_START 0x70 #define SAA7127_REG_RCV2_OUTPUT_END 0x71 #define SAA7127_REG_RCV2_OUTPUT_MSBS 0x72 #define SAA7127_REG_TTX_REQUEST_H_START 0x73 #define SAA7127_REG_TTX_REQUEST_H_DELAY_LENGTH 0x74 #define SAA7127_REG_CSYNC_ADVANCE_VSYNC_SHIFT 0x75 #define SAA7127_REG_TTX_ODD_REQ_VERT_START 0x76 #define SAA7127_REG_TTX_ODD_REQ_VERT_END 0x77 #define SAA7127_REG_TTX_EVEN_REQ_VERT_START 0x78 #define SAA7127_REG_TTX_EVEN_REQ_VERT_END 0x79 #define SAA7127_REG_FIRST_ACTIVE 0x7a #define SAA7127_REG_LAST_ACTIVE 0x7b #define SAA7127_REG_MSB_VERTICAL 0x7c #define SAA7127_REG_DISABLE_TTX_LINE_LO_0 0x7e #define SAA7127_REG_DISABLE_TTX_LINE_LO_1 0x7f /* ********************************************************************** * * Arrays with configuration parameters for the SAA7127 * ********************************************************************** */ struct i2c_reg_value { unsigned char reg; unsigned char value; }; static const struct i2c_reg_value saa7129_init_config_extra[] = { { SAA7127_REG_OUTPUT_PORT_CONTROL, 0x38 }, { SAA7127_REG_VTRIG, 0xfa }, { 0, 0 } }; static const struct i2c_reg_value saa7127_init_config_common[] = { { SAA7127_REG_WIDESCREEN_CONFIG, 0x0d }, { SAA7127_REG_WIDESCREEN_ENABLE, 0x00 }, { SAA7127_REG_COPYGEN_0, 0x77 }, { SAA7127_REG_COPYGEN_1, 0x41 }, { SAA7127_REG_COPYGEN_2, 0x00 }, /* Macrovision enable/disable */ { SAA7127_REG_OUTPUT_PORT_CONTROL, 0x9e }, { SAA7127_REG_GAIN_LUMINANCE_RGB, 0x00 }, { SAA7127_REG_GAIN_COLORDIFF_RGB, 0x00 }, { SAA7127_REG_INPUT_PORT_CONTROL_1, 0x80 }, /* for color bars */ { SAA7127_REG_LINE_21_ODD_0, 0x77 }, { SAA7127_REG_LINE_21_ODD_1, 0x41 }, { SAA7127_REG_LINE_21_EVEN_0, 0x88 }, { SAA7127_REG_LINE_21_EVEN_1, 0x41 }, { SAA7127_REG_RCV_PORT_CONTROL, 0x12 }, { SAA7127_REG_VTRIG, 0xf9 }, { SAA7127_REG_HTRIG_HI, 0x00 }, { SAA7127_REG_RCV2_OUTPUT_START, 0x41 }, { SAA7127_REG_RCV2_OUTPUT_END, 0xc3 }, { SAA7127_REG_RCV2_OUTPUT_MSBS, 0x00 }, { SAA7127_REG_TTX_REQUEST_H_START, 0x3e }, { SAA7127_REG_TTX_REQUEST_H_DELAY_LENGTH, 0xb8 }, { SAA7127_REG_CSYNC_ADVANCE_VSYNC_SHIFT, 0x03 }, { SAA7127_REG_TTX_ODD_REQ_VERT_START, 0x15 }, { SAA7127_REG_TTX_ODD_REQ_VERT_END, 0x16 }, { SAA7127_REG_TTX_EVEN_REQ_VERT_START, 0x15 }, { SAA7127_REG_TTX_EVEN_REQ_VERT_END, 0x16 }, { SAA7127_REG_FIRST_ACTIVE, 0x1a }, { SAA7127_REG_LAST_ACTIVE, 0x01 }, { SAA7127_REG_MSB_VERTICAL, 0xc0 }, { SAA7127_REG_DISABLE_TTX_LINE_LO_0, 0x00 }, { SAA7127_REG_DISABLE_TTX_LINE_LO_1, 0x00 }, { 0, 0 } }; #define SAA7127_60HZ_DAC_CONTROL 0x15 static const struct i2c_reg_value saa7127_init_config_60hz[] = { { SAA7127_REG_BURST_START, 0x19 }, /* BURST_END is also used as a chip ID in saa7127_detect_client */ { SAA7127_REG_BURST_END, 0x1d }, { SAA7127_REG_CHROMA_PHASE, 0xa3 }, { SAA7127_REG_GAINU, 0x98 }, { SAA7127_REG_GAINV, 0xd3 }, { SAA7127_REG_BLACK_LEVEL, 0x39 }, { SAA7127_REG_BLANKING_LEVEL, 0x2e }, { SAA7127_REG_VBI_BLANKING, 0x2e }, { SAA7127_REG_DAC_CONTROL, 0x15 }, { SAA7127_REG_BURST_AMP, 0x4d }, { SAA7127_REG_SUBC3, 0x1f }, { SAA7127_REG_SUBC2, 0x7c }, { SAA7127_REG_SUBC1, 0xf0 }, { SAA7127_REG_SUBC0, 0x21 }, { SAA7127_REG_MULTI, 0x90 }, { SAA7127_REG_CLOSED_CAPTION, 0x11 }, { 0, 0 } }; #define SAA7127_50HZ_DAC_CONTROL 0x02 static struct i2c_reg_value saa7127_init_config_50hz[] = { { SAA7127_REG_BURST_START, 0x21 }, /* BURST_END is also used as a chip ID in saa7127_detect_client */ { SAA7127_REG_BURST_END, 0x1d }, { SAA7127_REG_CHROMA_PHASE, 0x3f }, { SAA7127_REG_GAINU, 0x7d }, { SAA7127_REG_GAINV, 0xaf }, { SAA7127_REG_BLACK_LEVEL, 0x33 }, { SAA7127_REG_BLANKING_LEVEL, 0x35 }, { SAA7127_REG_VBI_BLANKING, 0x35 }, { SAA7127_REG_DAC_CONTROL, 0x02 }, { SAA7127_REG_BURST_AMP, 0x2f }, { SAA7127_REG_SUBC3, 0xcb }, { SAA7127_REG_SUBC2, 0x8a }, { SAA7127_REG_SUBC1, 0x09 }, { SAA7127_REG_SUBC0, 0x2a }, { SAA7127_REG_MULTI, 0xa0 }, { SAA7127_REG_CLOSED_CAPTION, 0x00 }, { 0, 0 } }; /* ********************************************************************** * * Encoder Struct, holds the configuration state of the encoder * ********************************************************************** */ struct saa7127_state { v4l2_std_id std; u32 ident; enum saa7127_input_type input_type; enum saa7127_output_type output_type; int video_enable; int wss_enable; u16 wss_mode; int cc_enable; u16 cc_data; int xds_enable; u16 xds_data; int vps_enable; u8 vps_data[5]; u8 reg_2d; u8 reg_3a; u8 reg_3a_cb; /* colorbar bit */ u8 reg_61; }; static const char * const output_strs[] = { "S-Video + Composite", "Composite", "S-Video", "RGB", "YUV C", "YUV V" }; static const char * const wss_strs[] = { "invalid", "letterbox 14:9 center", "letterbox 14:9 top", "invalid", "letterbox 16:9 top", "invalid", "invalid", "16:9 full format anamorphic", "4:3 full format", "invalid", "invalid", "letterbox 16:9 center", "invalid", "letterbox >16:9 center", "14:9 full format center", "invalid", }; /* ----------------------------------------------------------------------- */ static int saa7127_read(struct i2c_client *client, u8 reg) { return i2c_smbus_read_byte_data(client, reg); } /* ----------------------------------------------------------------------- */ static int saa7127_write(struct i2c_client *client, u8 reg, u8 val) { int i; for (i = 0; i < 3; i++) { if (i2c_smbus_write_byte_data(client, reg, val) == 0) return 0; } v4l_err(client, "I2C Write Problem\n"); return -1; } /* ----------------------------------------------------------------------- */ static int saa7127_write_inittab(struct i2c_client *client, const struct i2c_reg_value *regs) { while (regs->reg != 0) { saa7127_write(client, regs->reg, regs->value); regs++; } return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_vps(struct i2c_client *client, struct v4l2_sliced_vbi_data *data) { struct saa7127_state *state = i2c_get_clientdata(client); int enable = (data->line != 0); if (enable && (data->field != 0 || data->line != 16)) return -EINVAL; if (state->vps_enable != enable) { v4l_dbg(1, debug, client, "Turn VPS Signal %s\n", enable ? "on" : "off"); saa7127_write(client, 0x54, enable << 7); state->vps_enable = enable; } if (!enable) return 0; state->vps_data[0] = data->data[2]; state->vps_data[1] = data->data[8]; state->vps_data[2] = data->data[9]; state->vps_data[3] = data->data[10]; state->vps_data[4] = data->data[11]; v4l_dbg(1, debug, client, "Set VPS data %02x %02x %02x %02x %02x\n", state->vps_data[0], state->vps_data[1], state->vps_data[2], state->vps_data[3], state->vps_data[4]); saa7127_write(client, 0x55, state->vps_data[0]); saa7127_write(client, 0x56, state->vps_data[1]); saa7127_write(client, 0x57, state->vps_data[2]); saa7127_write(client, 0x58, state->vps_data[3]); saa7127_write(client, 0x59, state->vps_data[4]); return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_cc(struct i2c_client *client, struct v4l2_sliced_vbi_data *data) { struct saa7127_state *state = i2c_get_clientdata(client); u16 cc = data->data[1] << 8 | data->data[0]; int enable = (data->line != 0); if (enable && (data->field != 0 || data->line != 21)) return -EINVAL; if (state->cc_enable != enable) { v4l_dbg(1, debug, client, "Turn CC %s\n", enable ? "on" : "off"); saa7127_write(client, SAA7127_REG_CLOSED_CAPTION, (state->xds_enable << 7) | (enable << 6) | 0x11); state->cc_enable = enable; } if (!enable) return 0; v4l_dbg(2, debug, client, "CC data: %04x\n", cc); saa7127_write(client, SAA7127_REG_LINE_21_ODD_0, cc & 0xff); saa7127_write(client, SAA7127_REG_LINE_21_ODD_1, cc >> 8); state->cc_data = cc; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_xds(struct i2c_client *client, struct v4l2_sliced_vbi_data *data) { struct saa7127_state *state = i2c_get_clientdata(client); u16 xds = data->data[1] << 8 | data->data[0]; int enable = (data->line != 0); if (enable && (data->field != 1 || data->line != 21)) return -EINVAL; if (state->xds_enable != enable) { v4l_dbg(1, debug, client, "Turn XDS %s\n", enable ? "on" : "off"); saa7127_write(client, SAA7127_REG_CLOSED_CAPTION, (enable << 7) | (state->cc_enable << 6) | 0x11); state->xds_enable = enable; } if (!enable) return 0; v4l_dbg(2, debug, client, "XDS data: %04x\n", xds); saa7127_write(client, SAA7127_REG_LINE_21_EVEN_0, xds & 0xff); saa7127_write(client, SAA7127_REG_LINE_21_EVEN_1, xds >> 8); state->xds_data = xds; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_wss(struct i2c_client *client, struct v4l2_sliced_vbi_data *data) { struct saa7127_state *state = i2c_get_clientdata(client); int enable = (data->line != 0); if (enable && (data->field != 0 || data->line != 23)) return -EINVAL; if (state->wss_enable != enable) { v4l_dbg(1, debug, client, "Turn WSS %s\n", enable ? "on" : "off"); saa7127_write(client, 0x27, enable << 7); state->wss_enable = enable; } if (!enable) return 0; saa7127_write(client, 0x26, data->data[0]); saa7127_write(client, 0x27, 0x80 | (data->data[1] & 0x3f)); v4l_dbg(1, debug, client, "WSS mode: %s\n", wss_strs[data->data[0] & 0xf]); state->wss_mode = (data->data[1] & 0x3f) << 8 | data->data[0]; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_video_enable(struct i2c_client *client, int enable) { struct saa7127_state *state = i2c_get_clientdata(client); if (enable) { v4l_dbg(1, debug, client, "Enable Video Output\n"); saa7127_write(client, 0x2d, state->reg_2d); saa7127_write(client, 0x61, state->reg_61); } else { v4l_dbg(1, debug, client, "Disable Video Output\n"); saa7127_write(client, 0x2d, (state->reg_2d & 0xf0)); saa7127_write(client, 0x61, (state->reg_61 | 0xc0)); } state->video_enable = enable; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_std(struct i2c_client *client, v4l2_std_id std) { struct saa7127_state *state = i2c_get_clientdata(client); const struct i2c_reg_value *inittab; if (std & V4L2_STD_525_60) { v4l_dbg(1, debug, client, "Selecting 60 Hz video Standard\n"); inittab = saa7127_init_config_60hz; state->reg_61 = SAA7127_60HZ_DAC_CONTROL; } else { v4l_dbg(1, debug, client, "Selecting 50 Hz video Standard\n"); inittab = saa7127_init_config_50hz; state->reg_61 = SAA7127_50HZ_DAC_CONTROL; } /* Write Table */ saa7127_write_inittab(client, inittab); state->std = std; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_output_type(struct i2c_client *client, int output) { struct saa7127_state *state = i2c_get_clientdata(client); switch (output) { case SAA7127_OUTPUT_TYPE_RGB: state->reg_2d = 0x0f; /* RGB + CVBS (for sync) */ state->reg_3a = 0x13; /* by default switch YUV to RGB-matrix on */ break; case SAA7127_OUTPUT_TYPE_COMPOSITE: state->reg_2d = 0x08; /* 00001000 CVBS only, RGB DAC's off (high impedance mode) */ state->reg_3a = 0x13; /* by default switch YUV to RGB-matrix on */ break; case SAA7127_OUTPUT_TYPE_SVIDEO: state->reg_2d = 0xff; /* 11111111 croma -> R, luma -> CVBS + G + B */ state->reg_3a = 0x13; /* by default switch YUV to RGB-matrix on */ break; case SAA7127_OUTPUT_TYPE_YUV_V: state->reg_2d = 0x4f; /* reg 2D = 01001111, all DAC's on, RGB + VBS */ state->reg_3a = 0x0b; /* reg 3A = 00001011, bypass RGB-matrix */ break; case SAA7127_OUTPUT_TYPE_YUV_C: state->reg_2d = 0x0f; /* reg 2D = 00001111, all DAC's on, RGB + CVBS */ state->reg_3a = 0x0b; /* reg 3A = 00001011, bypass RGB-matrix */ break; case SAA7127_OUTPUT_TYPE_BOTH: state->reg_2d = 0xbf; state->reg_3a = 0x13; /* by default switch YUV to RGB-matrix on */ break; default: return -EINVAL; } v4l_dbg(1, debug, client, "Selecting %s output type\n", output_strs[output]); /* Configure Encoder */ saa7127_write(client, 0x2d, state->reg_2d); saa7127_write(client, 0x3a, state->reg_3a | state->reg_3a_cb); state->output_type = output; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_set_input_type(struct i2c_client *client, int input) { struct saa7127_state *state = i2c_get_clientdata(client); switch (input) { case SAA7127_INPUT_TYPE_NORMAL: /* avia */ v4l_dbg(1, debug, client, "Selecting Normal Encoder Input\n"); state->reg_3a_cb = 0; break; case SAA7127_INPUT_TYPE_TEST_IMAGE: /* color bar */ v4l_dbg(1, debug, client, "Selecting Color Bar generator\n"); state->reg_3a_cb = 0x80; break; default: return -EINVAL; } saa7127_write(client, 0x3a, state->reg_3a | state->reg_3a_cb); state->input_type = input; return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_command(struct i2c_client *client, unsigned int cmd, void *arg) { struct saa7127_state *state = i2c_get_clientdata(client); struct v4l2_format *fmt = arg; struct v4l2_routing *route = arg; switch (cmd) { case VIDIOC_INT_S_STD_OUTPUT: if (state->std == *(v4l2_std_id *)arg) break; return saa7127_set_std(client, *(v4l2_std_id *)arg); case VIDIOC_INT_G_STD_OUTPUT: *(v4l2_std_id *)arg = state->std; break; case VIDIOC_INT_G_VIDEO_ROUTING: route->input = state->input_type; route->output = state->output_type; break; case VIDIOC_INT_S_VIDEO_ROUTING: { int rc = 0; if (state->input_type != route->input) rc = saa7127_set_input_type(client, route->input); if (rc == 0 && state->output_type != route->output) rc = saa7127_set_output_type(client, route->output); return rc; } case VIDIOC_STREAMON: case VIDIOC_STREAMOFF: if (state->video_enable == (cmd == VIDIOC_STREAMON)) break; return saa7127_set_video_enable(client, cmd == VIDIOC_STREAMON); case VIDIOC_G_FMT: if (fmt->type != V4L2_BUF_TYPE_SLICED_VBI_CAPTURE) return -EINVAL; memset(&fmt->fmt.sliced, 0, sizeof(fmt->fmt.sliced)); if (state->vps_enable) fmt->fmt.sliced.service_lines[0][16] = V4L2_SLICED_VPS; if (state->wss_enable) fmt->fmt.sliced.service_lines[0][23] = V4L2_SLICED_WSS_625; if (state->cc_enable) { fmt->fmt.sliced.service_lines[0][21] = V4L2_SLICED_CAPTION_525; fmt->fmt.sliced.service_lines[1][21] = V4L2_SLICED_CAPTION_525; } fmt->fmt.sliced.service_set = (state->vps_enable ? V4L2_SLICED_VPS : 0) | (state->wss_enable ? V4L2_SLICED_WSS_625 : 0) | (state->cc_enable ? V4L2_SLICED_CAPTION_525 : 0); break; case VIDIOC_LOG_STATUS: v4l_info(client, "Standard: %s\n", (state->std & V4L2_STD_525_60) ? "60 Hz" : "50 Hz"); v4l_info(client, "Input: %s\n", state->input_type ? "color bars" : "normal"); v4l_info(client, "Output: %s\n", state->video_enable ? output_strs[state->output_type] : "disabled"); v4l_info(client, "WSS: %s\n", state->wss_enable ? wss_strs[state->wss_mode] : "disabled"); v4l_info(client, "VPS: %s\n", state->vps_enable ? "enabled" : "disabled"); v4l_info(client, "CC: %s\n", state->cc_enable ? "enabled" : "disabled"); break; #ifdef CONFIG_VIDEO_ADV_DEBUG case VIDIOC_DBG_G_REGISTER: case VIDIOC_DBG_S_REGISTER: { struct v4l2_register *reg = arg; if (!v4l2_chip_match_i2c_client(client, reg->match_type, reg->match_chip)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (cmd == VIDIOC_DBG_G_REGISTER) reg->val = saa7127_read(client, reg->reg & 0xff); else saa7127_write(client, reg->reg & 0xff, reg->val & 0xff); break; } #endif case VIDIOC_INT_S_VBI_DATA: { struct v4l2_sliced_vbi_data *data = arg; switch (data->id) { case V4L2_SLICED_WSS_625: return saa7127_set_wss(client, data); case V4L2_SLICED_VPS: return saa7127_set_vps(client, data); case V4L2_SLICED_CAPTION_525: if (data->field == 0) return saa7127_set_cc(client, data); return saa7127_set_xds(client, data); default: return -EINVAL; } break; } case VIDIOC_G_CHIP_IDENT: return v4l2_chip_ident_i2c_client(client, arg, state->ident, 0); default: return -EINVAL; } return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct saa7127_state *state; struct v4l2_sliced_vbi_data vbi = { 0, 0, 0, 0 }; /* set to disabled */ /* Check if the adapter supports the needed features */ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; v4l_dbg(1, debug, client, "detecting saa7127 client on address 0x%x\n", client->addr << 1); /* First test register 0: Bits 5-7 are a version ID (should be 0), and bit 2 should also be 0. This is rather general, so the second test is more specific and looks at the 'ending point of burst in clock cycles' which is 0x1d after a reset and not expected to ever change. */ if ((saa7127_read(client, 0) & 0xe4) != 0 || (saa7127_read(client, 0x29) & 0x3f) != 0x1d) { v4l_dbg(1, debug, client, "saa7127 not found\n"); return -ENODEV; } state = kzalloc(sizeof(struct saa7127_state), GFP_KERNEL); if (state == NULL) return -ENOMEM; i2c_set_clientdata(client, state); /* Configure Encoder */ v4l_dbg(1, debug, client, "Configuring encoder\n"); saa7127_write_inittab(client, saa7127_init_config_common); saa7127_set_std(client, V4L2_STD_NTSC); saa7127_set_output_type(client, SAA7127_OUTPUT_TYPE_BOTH); saa7127_set_vps(client, &vbi); saa7127_set_wss(client, &vbi); saa7127_set_cc(client, &vbi); saa7127_set_xds(client, &vbi); if (test_image == 1) /* The Encoder has an internal Colorbar generator */ /* This can be used for debugging */ saa7127_set_input_type(client, SAA7127_INPUT_TYPE_TEST_IMAGE); else saa7127_set_input_type(client, SAA7127_INPUT_TYPE_NORMAL); saa7127_set_video_enable(client, 1); if (id->driver_data) { /* Chip type is already known */ state->ident = id->driver_data; } else { /* Needs detection */ int read_result; /* Detect if it's an saa7129 */ read_result = saa7127_read(client, SAA7129_REG_FADE_KEY_COL2); saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, 0xaa); if (saa7127_read(client, SAA7129_REG_FADE_KEY_COL2) == 0xaa) { saa7127_write(client, SAA7129_REG_FADE_KEY_COL2, read_result); state->ident = V4L2_IDENT_SAA7129; strlcpy(client->name, "saa7129", I2C_NAME_SIZE); } else { state->ident = V4L2_IDENT_SAA7127; strlcpy(client->name, "saa7127", I2C_NAME_SIZE); } } v4l_info(client, "%s found @ 0x%x (%s)\n", client->name, client->addr << 1, client->adapter->name); if (state->ident == V4L2_IDENT_SAA7129) saa7127_write_inittab(client, saa7129_init_config_extra); return 0; } /* ----------------------------------------------------------------------- */ static int saa7127_remove(struct i2c_client *client) { /* Turn off TV output */ saa7127_set_video_enable(client, 0); kfree(i2c_get_clientdata(client)); return 0; } /* ----------------------------------------------------------------------- */ static struct i2c_device_id saa7127_id[] = { { "saa7127_auto", 0 }, /* auto-detection */ { "saa7126", V4L2_IDENT_SAA7127 }, { "saa7127", V4L2_IDENT_SAA7127 }, { "saa7128", V4L2_IDENT_SAA7129 }, { "saa7129", V4L2_IDENT_SAA7129 }, { } }; MODULE_DEVICE_TABLE(i2c, saa7127_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "saa7127", .driverid = I2C_DRIVERID_SAA7127, .command = saa7127_command, .probe = saa7127_probe, .remove = saa7127_remove, .id_table = saa7127_id, };