/* * saa7191.c - Philips SAA7191 video decoder driver * * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org> * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/delay.h> #include <linux/errno.h> #include <linux/fs.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/major.h> #include <linux/module.h> #include <linux/mm.h> #include <linux/slab.h> #include <linux/videodev2.h> #include <linux/i2c.h> #include <media/v4l2-device.h> #include <media/v4l2-chip-ident.h> #include <media/v4l2-i2c-drv.h> #include "saa7191.h" #define SAA7191_MODULE_VERSION "0.0.5" MODULE_DESCRIPTION("Philips SAA7191 video decoder driver"); MODULE_VERSION(SAA7191_MODULE_VERSION); MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); MODULE_LICENSE("GPL"); // #define SAA7191_DEBUG #ifdef SAA7191_DEBUG #define dprintk(x...) printk("SAA7191: " x); #else #define dprintk(x...) #endif #define SAA7191_SYNC_COUNT 30 #define SAA7191_SYNC_DELAY 100 /* milliseconds */ struct saa7191 { struct v4l2_subdev sd; /* the register values are stored here as the actual * I2C-registers are write-only */ u8 reg[25]; int input; v4l2_std_id norm; }; static inline struct saa7191 *to_saa7191(struct v4l2_subdev *sd) { return container_of(sd, struct saa7191, sd); } static const u8 initseq[] = { 0, /* Subaddress */ 0x50, /* (0x50) SAA7191_REG_IDEL */ /* 50 Hz signal timing */ 0x30, /* (0x30) SAA7191_REG_HSYB */ 0x00, /* (0x00) SAA7191_REG_HSYS */ 0xe8, /* (0xe8) SAA7191_REG_HCLB */ 0xb6, /* (0xb6) SAA7191_REG_HCLS */ 0xf4, /* (0xf4) SAA7191_REG_HPHI */ /* control */ SAA7191_LUMA_APER_1, /* (0x01) SAA7191_REG_LUMA - CVBS mode */ 0x00, /* (0x00) SAA7191_REG_HUEC */ 0xf8, /* (0xf8) SAA7191_REG_CKTQ */ 0xf8, /* (0xf8) SAA7191_REG_CKTS */ 0x90, /* (0x90) SAA7191_REG_PLSE */ 0x90, /* (0x90) SAA7191_REG_SESE */ 0x00, /* (0x00) SAA7191_REG_GAIN */ SAA7191_STDC_NFEN | SAA7191_STDC_HRMV, /* (0x0c) SAA7191_REG_STDC * - not SECAM, * slow time constant */ SAA7191_IOCK_OEDC | SAA7191_IOCK_OEHS | SAA7191_IOCK_OEVS | SAA7191_IOCK_OEDY, /* (0x78) SAA7191_REG_IOCK * - chroma from CVBS, GPSW1 & 2 off */ SAA7191_CTL3_AUFD | SAA7191_CTL3_SCEN | SAA7191_CTL3_OFTS | SAA7191_CTL3_YDEL0, /* (0x99) SAA7191_REG_CTL3 * - automatic field detection */ 0x00, /* (0x00) SAA7191_REG_CTL4 */ 0x2c, /* (0x2c) SAA7191_REG_CHCV - PAL nominal value */ 0x00, /* unused */ 0x00, /* unused */ /* 60 Hz signal timing */ 0x34, /* (0x34) SAA7191_REG_HS6B */ 0x0a, /* (0x0a) SAA7191_REG_HS6S */ 0xf4, /* (0xf4) SAA7191_REG_HC6B */ 0xce, /* (0xce) SAA7191_REG_HC6S */ 0xf4, /* (0xf4) SAA7191_REG_HP6I */ }; /* SAA7191 register handling */ static u8 saa7191_read_reg(struct v4l2_subdev *sd, u8 reg) { return to_saa7191(sd)->reg[reg]; } static int saa7191_read_status(struct v4l2_subdev *sd, u8 *value) { struct i2c_client *client = v4l2_get_subdevdata(sd); int ret; ret = i2c_master_recv(client, value, 1); if (ret < 0) { printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed\n"); return ret; } return 0; } static int saa7191_write_reg(struct v4l2_subdev *sd, u8 reg, u8 value) { struct i2c_client *client = v4l2_get_subdevdata(sd); to_saa7191(sd)->reg[reg] = value; return i2c_smbus_write_byte_data(client, reg, value); } /* the first byte of data must be the first subaddress number (register) */ static int saa7191_write_block(struct v4l2_subdev *sd, u8 length, const u8 *data) { struct i2c_client *client = v4l2_get_subdevdata(sd); struct saa7191 *decoder = to_saa7191(sd); int i; int ret; for (i = 0; i < (length - 1); i++) { decoder->reg[data[0] + i] = data[i + 1]; } ret = i2c_master_send(client, data, length); if (ret < 0) { printk(KERN_ERR "SAA7191: saa7191_write_block(): " "write failed\n"); return ret; } return 0; } /* Helper functions */ static int saa7191_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { struct saa7191 *decoder = to_saa7191(sd); u8 luma = saa7191_read_reg(sd, SAA7191_REG_LUMA); u8 iock = saa7191_read_reg(sd, SAA7191_REG_IOCK); int err; switch (input) { case SAA7191_INPUT_COMPOSITE: /* Set Composite input */ iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1 | SAA7191_IOCK_GPSW2); /* Chrominance trap active */ luma &= ~SAA7191_LUMA_BYPS; break; case SAA7191_INPUT_SVIDEO: /* Set S-Video input */ iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2; /* Chrominance trap bypassed */ luma |= SAA7191_LUMA_BYPS; break; default: return -EINVAL; } err = saa7191_write_reg(sd, SAA7191_REG_LUMA, luma); if (err) return -EIO; err = saa7191_write_reg(sd, SAA7191_REG_IOCK, iock); if (err) return -EIO; decoder->input = input; return 0; } static int saa7191_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) { struct saa7191 *decoder = to_saa7191(sd); u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC); u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3); u8 chcv = saa7191_read_reg(sd, SAA7191_REG_CHCV); int err; if (norm & V4L2_STD_PAL) { stdc &= ~SAA7191_STDC_SECS; ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); chcv = SAA7191_CHCV_PAL; } else if (norm & V4L2_STD_NTSC) { stdc &= ~SAA7191_STDC_SECS; ctl3 &= ~SAA7191_CTL3_AUFD; ctl3 |= SAA7191_CTL3_FSEL; chcv = SAA7191_CHCV_NTSC; } else if (norm & V4L2_STD_SECAM) { stdc |= SAA7191_STDC_SECS; ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); chcv = SAA7191_CHCV_PAL; } else { return -EINVAL; } err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3); if (err) return -EIO; err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc); if (err) return -EIO; err = saa7191_write_reg(sd, SAA7191_REG_CHCV, chcv); if (err) return -EIO; decoder->norm = norm; dprintk("ctl3: %02x stdc: %02x chcv: %02x\n", ctl3, stdc, chcv); dprintk("norm: %llx\n", norm); return 0; } static int saa7191_wait_for_signal(struct v4l2_subdev *sd, u8 *status) { int i = 0; dprintk("Checking for signal...\n"); for (i = 0; i < SAA7191_SYNC_COUNT; i++) { if (saa7191_read_status(sd, status)) return -EIO; if (((*status) & SAA7191_STATUS_HLCK) == 0) { dprintk("Signal found\n"); return 0; } msleep(SAA7191_SYNC_DELAY); } dprintk("No signal\n"); return -EBUSY; } static int saa7191_querystd(struct v4l2_subdev *sd, v4l2_std_id *norm) { struct saa7191 *decoder = to_saa7191(sd); u8 stdc = saa7191_read_reg(sd, SAA7191_REG_STDC); u8 ctl3 = saa7191_read_reg(sd, SAA7191_REG_CTL3); u8 status; v4l2_std_id old_norm = decoder->norm; int err = 0; dprintk("SAA7191 extended signal auto-detection...\n"); *norm = V4L2_STD_NTSC | V4L2_STD_PAL | V4L2_STD_SECAM; stdc &= ~SAA7191_STDC_SECS; ctl3 &= ~(SAA7191_CTL3_FSEL); err = saa7191_write_reg(sd, SAA7191_REG_STDC, stdc); if (err) { err = -EIO; goto out; } err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3); if (err) { err = -EIO; goto out; } ctl3 |= SAA7191_CTL3_AUFD; err = saa7191_write_reg(sd, SAA7191_REG_CTL3, ctl3); if (err) { err = -EIO; goto out; } msleep(SAA7191_SYNC_DELAY); err = saa7191_wait_for_signal(sd, &status); if (err) goto out; if (status & SAA7191_STATUS_FIDT) { /* 60Hz signal -> NTSC */ dprintk("60Hz signal: NTSC\n"); *norm = V4L2_STD_NTSC; return 0; } /* 50Hz signal */ dprintk("50Hz signal: Trying PAL...\n"); /* try PAL first */ err = saa7191_s_std(sd, V4L2_STD_PAL); if (err) goto out; msleep(SAA7191_SYNC_DELAY); err = saa7191_wait_for_signal(sd, &status); if (err) goto out; /* not 50Hz ? */ if (status & SAA7191_STATUS_FIDT) { dprintk("No 50Hz signal\n"); saa7191_s_std(sd, old_norm); return -EAGAIN; } if (status & SAA7191_STATUS_CODE) { dprintk("PAL\n"); *norm = V4L2_STD_PAL; return saa7191_s_std(sd, old_norm); } dprintk("No color detected with PAL - Trying SECAM...\n"); /* no color detected ? -> try SECAM */ err = saa7191_s_std(sd, V4L2_STD_SECAM); if (err) goto out; msleep(SAA7191_SYNC_DELAY); err = saa7191_wait_for_signal(sd, &status); if (err) goto out; /* not 50Hz ? */ if (status & SAA7191_STATUS_FIDT) { dprintk("No 50Hz signal\n"); err = -EAGAIN; goto out; } if (status & SAA7191_STATUS_CODE) { /* Color detected -> SECAM */ dprintk("SECAM\n"); *norm = V4L2_STD_SECAM; return saa7191_s_std(sd, old_norm); } dprintk("No color detected with SECAM - Going back to PAL.\n"); out: return saa7191_s_std(sd, old_norm); } static int saa7191_autodetect_norm(struct v4l2_subdev *sd) { u8 status; dprintk("SAA7191 signal auto-detection...\n"); dprintk("Reading status...\n"); if (saa7191_read_status(sd, &status)) return -EIO; dprintk("Checking for signal...\n"); /* no signal ? */ if (status & SAA7191_STATUS_HLCK) { dprintk("No signal\n"); return -EBUSY; } dprintk("Signal found\n"); if (status & SAA7191_STATUS_FIDT) { /* 60hz signal -> NTSC */ dprintk("NTSC\n"); return saa7191_s_std(sd, V4L2_STD_NTSC); } else { /* 50hz signal -> PAL */ dprintk("PAL\n"); return saa7191_s_std(sd, V4L2_STD_PAL); } } static int saa7191_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { u8 reg; int ret = 0; switch (ctrl->id) { case SAA7191_CONTROL_BANDPASS: case SAA7191_CONTROL_BANDPASS_WEIGHT: case SAA7191_CONTROL_CORING: reg = saa7191_read_reg(sd, SAA7191_REG_LUMA); switch (ctrl->id) { case SAA7191_CONTROL_BANDPASS: ctrl->value = ((s32)reg & SAA7191_LUMA_BPSS_MASK) >> SAA7191_LUMA_BPSS_SHIFT; break; case SAA7191_CONTROL_BANDPASS_WEIGHT: ctrl->value = ((s32)reg & SAA7191_LUMA_APER_MASK) >> SAA7191_LUMA_APER_SHIFT; break; case SAA7191_CONTROL_CORING: ctrl->value = ((s32)reg & SAA7191_LUMA_CORI_MASK) >> SAA7191_LUMA_CORI_SHIFT; break; } break; case SAA7191_CONTROL_FORCE_COLOUR: case SAA7191_CONTROL_CHROMA_GAIN: reg = saa7191_read_reg(sd, SAA7191_REG_GAIN); if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR) ctrl->value = ((s32)reg & SAA7191_GAIN_COLO) ? 1 : 0; else ctrl->value = ((s32)reg & SAA7191_GAIN_LFIS_MASK) >> SAA7191_GAIN_LFIS_SHIFT; break; case V4L2_CID_HUE: reg = saa7191_read_reg(sd, SAA7191_REG_HUEC); if (reg < 0x80) reg += 0x80; else reg -= 0x80; ctrl->value = (s32)reg; break; case SAA7191_CONTROL_VTRC: reg = saa7191_read_reg(sd, SAA7191_REG_STDC); ctrl->value = ((s32)reg & SAA7191_STDC_VTRC) ? 1 : 0; break; case SAA7191_CONTROL_LUMA_DELAY: reg = saa7191_read_reg(sd, SAA7191_REG_CTL3); ctrl->value = ((s32)reg & SAA7191_CTL3_YDEL_MASK) >> SAA7191_CTL3_YDEL_SHIFT; if (ctrl->value >= 4) ctrl->value -= 8; break; case SAA7191_CONTROL_VNR: reg = saa7191_read_reg(sd, SAA7191_REG_CTL4); ctrl->value = ((s32)reg & SAA7191_CTL4_VNOI_MASK) >> SAA7191_CTL4_VNOI_SHIFT; break; default: ret = -EINVAL; } return ret; } static int saa7191_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) { u8 reg; int ret = 0; switch (ctrl->id) { case SAA7191_CONTROL_BANDPASS: case SAA7191_CONTROL_BANDPASS_WEIGHT: case SAA7191_CONTROL_CORING: reg = saa7191_read_reg(sd, SAA7191_REG_LUMA); switch (ctrl->id) { case SAA7191_CONTROL_BANDPASS: reg &= ~SAA7191_LUMA_BPSS_MASK; reg |= (ctrl->value << SAA7191_LUMA_BPSS_SHIFT) & SAA7191_LUMA_BPSS_MASK; break; case SAA7191_CONTROL_BANDPASS_WEIGHT: reg &= ~SAA7191_LUMA_APER_MASK; reg |= (ctrl->value << SAA7191_LUMA_APER_SHIFT) & SAA7191_LUMA_APER_MASK; break; case SAA7191_CONTROL_CORING: reg &= ~SAA7191_LUMA_CORI_MASK; reg |= (ctrl->value << SAA7191_LUMA_CORI_SHIFT) & SAA7191_LUMA_CORI_MASK; break; } ret = saa7191_write_reg(sd, SAA7191_REG_LUMA, reg); break; case SAA7191_CONTROL_FORCE_COLOUR: case SAA7191_CONTROL_CHROMA_GAIN: reg = saa7191_read_reg(sd, SAA7191_REG_GAIN); if (ctrl->id == SAA7191_CONTROL_FORCE_COLOUR) { if (ctrl->value) reg |= SAA7191_GAIN_COLO; else reg &= ~SAA7191_GAIN_COLO; } else { reg &= ~SAA7191_GAIN_LFIS_MASK; reg |= (ctrl->value << SAA7191_GAIN_LFIS_SHIFT) & SAA7191_GAIN_LFIS_MASK; } ret = saa7191_write_reg(sd, SAA7191_REG_GAIN, reg); break; case V4L2_CID_HUE: reg = ctrl->value & 0xff; if (reg < 0x80) reg += 0x80; else reg -= 0x80; ret = saa7191_write_reg(sd, SAA7191_REG_HUEC, reg); break; case SAA7191_CONTROL_VTRC: reg = saa7191_read_reg(sd, SAA7191_REG_STDC); if (ctrl->value) reg |= SAA7191_STDC_VTRC; else reg &= ~SAA7191_STDC_VTRC; ret = saa7191_write_reg(sd, SAA7191_REG_STDC, reg); break; case SAA7191_CONTROL_LUMA_DELAY: { s32 value = ctrl->value; if (value < 0) value += 8; reg = saa7191_read_reg(sd, SAA7191_REG_CTL3); reg &= ~SAA7191_CTL3_YDEL_MASK; reg |= (value << SAA7191_CTL3_YDEL_SHIFT) & SAA7191_CTL3_YDEL_MASK; ret = saa7191_write_reg(sd, SAA7191_REG_CTL3, reg); break; } case SAA7191_CONTROL_VNR: reg = saa7191_read_reg(sd, SAA7191_REG_CTL4); reg &= ~SAA7191_CTL4_VNOI_MASK; reg |= (ctrl->value << SAA7191_CTL4_VNOI_SHIFT) & SAA7191_CTL4_VNOI_MASK; ret = saa7191_write_reg(sd, SAA7191_REG_CTL4, reg); break; default: ret = -EINVAL; } return ret; } /* I2C-interface */ static int saa7191_g_input_status(struct v4l2_subdev *sd, u32 *status) { u8 status_reg; int res = V4L2_IN_ST_NO_SIGNAL; if (saa7191_read_status(sd, &status_reg)) return -EIO; if ((status_reg & SAA7191_STATUS_HLCK) == 0) res = 0; if (!(status_reg & SAA7191_STATUS_CODE)) res |= V4L2_IN_ST_NO_COLOR; *status = res; return 0; } static int saa7191_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) { struct i2c_client *client = v4l2_get_subdevdata(sd); return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7191, 0); } /* ----------------------------------------------------------------------- */ static const struct v4l2_subdev_core_ops saa7191_core_ops = { .g_chip_ident = saa7191_g_chip_ident, .g_ctrl = saa7191_g_ctrl, .s_ctrl = saa7191_s_ctrl, .s_std = saa7191_s_std, }; static const struct v4l2_subdev_video_ops saa7191_video_ops = { .s_routing = saa7191_s_routing, .querystd = saa7191_querystd, .g_input_status = saa7191_g_input_status, }; static const struct v4l2_subdev_ops saa7191_ops = { .core = &saa7191_core_ops, .video = &saa7191_video_ops, }; static int saa7191_probe(struct i2c_client *client, const struct i2c_device_id *id) { int err = 0; struct saa7191 *decoder; struct v4l2_subdev *sd; v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name); decoder = kzalloc(sizeof(*decoder), GFP_KERNEL); if (!decoder) return -ENOMEM; sd = &decoder->sd; v4l2_i2c_subdev_init(sd, client, &saa7191_ops); err = saa7191_write_block(sd, sizeof(initseq), initseq); if (err) { printk(KERN_ERR "SAA7191 initialization failed\n"); kfree(decoder); return err; } printk(KERN_INFO "SAA7191 initialized\n"); decoder->input = SAA7191_INPUT_COMPOSITE; decoder->norm = V4L2_STD_PAL; err = saa7191_autodetect_norm(sd); if (err && (err != -EBUSY)) printk(KERN_ERR "SAA7191: Signal auto-detection failed\n"); return 0; } static int saa7191_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); v4l2_device_unregister_subdev(sd); kfree(to_saa7191(sd)); return 0; } static const struct i2c_device_id saa7191_id[] = { { "saa7191", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, saa7191_id); static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "saa7191", .probe = saa7191_probe, .remove = saa7191_remove, .id_table = saa7191_id, };