cx25840-core.c

V4l driver for DVB HD

		if (mode == 2 || mode == 4)
			val = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;

		if (mode & 0x10)
			val |= V4L2_TUNER_SUB_SAP;

		vt->rxsubchans = val;
		vt->audmode = state->audmode;
		break;
	}

	case VIDIOC_S_TUNER:
		if (state->radio)
			break;

		switch (vt->audmode) {
		case V4L2_TUNER_MODE_MONO:
			/* mono      -> mono
			   stereo    -> mono
			   bilingual -> lang1 */
			cx25840_and_or(client, 0x809, ~0xf, 0x00);
			break;
		case V4L2_TUNER_MODE_STEREO:
		case V4L2_TUNER_MODE_LANG1:
			/* mono      -> mono
			   stereo    -> stereo
			   bilingual -> lang1 */
			cx25840_and_or(client, 0x809, ~0xf, 0x04);
			break;
		case V4L2_TUNER_MODE_LANG1_LANG2:
			/* mono      -> mono
			   stereo    -> stereo
			   bilingual -> lang1/lang2 */
			cx25840_and_or(client, 0x809, ~0xf, 0x07);
			break;
		case V4L2_TUNER_MODE_LANG2:
			/* mono      -> mono
			   stereo    -> stereo
			   bilingual -> lang2 */
			cx25840_and_or(client, 0x809, ~0xf, 0x01);
			break;
		default:
			return -EINVAL;
		}
		state->audmode = vt->audmode;
		break;

	case VIDIOC_G_FMT:
		return get_v4lfmt(client, (struct v4l2_format *)arg);

	case VIDIOC_S_FMT:
		return set_v4lfmt(client, (struct v4l2_format *)arg);

	case VIDIOC_INT_RESET:
		cx25840_initialize(client, 0);
		break;

	case VIDIOC_INT_G_CHIP_IDENT:
		*(enum v4l2_chip_ident *)arg =
			V4L2_IDENT_CX25840 + ((cx25840_read(client, 0x100) >> 4) & 0xf);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver_cx25840;

static int cx25840_detect_client(struct i2c_adapter *adapter, int address,
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
				 unsigned short flags,
#endif
				 int kind)
{
	struct i2c_client *client;
	struct cx25840_state *state;
	u16 device_id;

	/* Check if the adapter supports the needed features
	 * Not until kernel version 2.6.11 did the bit-algo
	 * correctly report that it would do an I2C-level xfer */
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)
	if (!adapter->algo->master_xfer)
#else
	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
#endif
		return 0;

	client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
	if (client == 0)
		return -ENOMEM;

	client->addr = address;
	client->adapter = adapter;
	client->driver = &i2c_driver_cx25840;
#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
	client->flags = I2C_CLIENT_ALLOW_USE;
#endif
	snprintf(client->name, sizeof(client->name) - 1, "cx25840");

	v4l_dbg(1, cx25840_debug, client, "detecting cx25840 client on address 0x%x\n", address << 1);

	device_id = cx25840_read(client, 0x101) << 8;
	device_id |= cx25840_read(client, 0x100);

	/* The high byte of the device ID should be
	 * 0x84 if chip is present */
	if ((device_id & 0xff00) != 0x8400) {
		v4l_dbg(1, cx25840_debug, client, "cx25840 not found\n");
		kfree(client);
		return 0;
	}

	v4l_info(client, "cx25%3x-2%x found @ 0x%x (%s)\n",
		    (device_id & 0xfff0) >> 4,
		    (device_id & 0x0f) < 3 ? (device_id & 0x0f) + 1 : 3,
		    address << 1, adapter->name);

	state = kmalloc(sizeof(struct cx25840_state), GFP_KERNEL);
	if (state == NULL) {
		kfree(client);
		return -ENOMEM;
	}

	i2c_set_clientdata(client, state);
	memset(state, 0, sizeof(struct cx25840_state));
	state->vid_input = CX25840_COMPOSITE7;
	state->aud_input = CX25840_AUDIO8;
	state->audclk_freq = 48000;
	state->pvr150_workaround = 0;
	state->audmode = V4L2_TUNER_MODE_LANG1;

	cx25840_initialize(client, 1);

	i2c_attach_client(client);

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_INC_USE_COUNT;
#endif
	return 0;
}

static int cx25840_attach_adapter(struct i2c_adapter *adapter)
{
#ifdef I2C_CLASS_TV_ANALOG
	if (adapter->class & I2C_CLASS_TV_ANALOG)
#else
	if (adapter->id == I2C_HW_B_BT848)
#endif
		return i2c_probe(adapter, &addr_data, &cx25840_detect_client);
	return 0;
}

static int cx25840_detach_client(struct i2c_client *client)
{
	struct cx25840_state *state = i2c_get_clientdata(client);
	int err;

	err = i2c_detach_client(client);
	if (err) {
		return err;
	}

	kfree(state);
	kfree(client);

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
	MOD_DEC_USE_COUNT;
#endif
	return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver_cx25840 = {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) && (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15))
	.owner = THIS_MODULE,
#endif
#if LINUX_VERSION_CODE <=  KERNEL_VERSION(2,6,15)
	.name = "cx25840",
	.flags = I2C_DF_NOTIFY,
#else
	.driver = {
		.name = "cx25840",
	},
#endif
	.id = I2C_DRIVERID_CX25840,
	.attach_adapter = cx25840_attach_adapter,
	.detach_client = cx25840_detach_client,
	.command = cx25840_command,
};

#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
EXPORT_NO_SYMBOLS;
#endif

static int __init m__init(void)
{
	return i2c_add_driver(&i2c_driver_cx25840);
}

static void __exit m__exit(void)
{
	i2c_del_driver(&i2c_driver_cx25840);
}

module_init(m__init);
module_exit(m__exit);

/* ----------------------------------------------------------------------- */

static void log_status(struct i2c_client *client)
{
	static const char *const fmt_strs[] = {
		"0x0",
		"NTSC-M", "NTSC-J", "NTSC-4.43",
		"PAL-BDGHI", "PAL-M", "PAL-N", "PAL-Nc", "PAL-60",
		"0x9", "0xA", "0xB",
		"SECAM",
		"0xD", "0xE", "0xF"
	};

	struct cx25840_state *state = i2c_get_clientdata(client);
	u8 microctrl_vidfmt = cx25840_read(client, 0x80a);
	u8 vidfmt_sel = cx25840_read(client, 0x400) & 0xf;
	u8 gen_stat1 = cx25840_read(client, 0x40d);
	u8 download_ctl = cx25840_read(client, 0x803);
	u8 mod_det_stat0 = cx25840_read(client, 0x804);
	u8 mod_det_stat1 = cx25840_read(client, 0x805);
	u8 audio_config = cx25840_read(client, 0x808);
	u8 pref_mode = cx25840_read(client, 0x809);
	u8 afc0 = cx25840_read(client, 0x80b);
	u8 mute_ctl = cx25840_read(client, 0x8d3);
	int vid_input = state->vid_input;
	int aud_input = state->aud_input;
	char *p;

	v4l_info(client, "Video signal:              %spresent\n",
		    (microctrl_vidfmt & 0x10) ? "" : "not ");
	v4l_info(client, "Detected format:           %s\n",
		    fmt_strs[gen_stat1 & 0xf]);

	switch (mod_det_stat0) {
	case 0x00: p = "mono"; break;
	case 0x01: p = "stereo"; break;
	case 0x02: p = "dual"; break;
	case 0x04: p = "tri"; break;
	case 0x10: p = "mono with SAP"; break;
	case 0x11: p = "stereo with SAP"; break;
	case 0x12: p = "dual with SAP"; break;
	case 0x14: p = "tri with SAP"; break;
	case 0xfe: p = "forced mode"; break;
	default: p = "not defined";
	}
	v4l_info(client, "Detected audio mode:       %s\n", p);

	switch (mod_det_stat1) {
	case 0x00: p = "not defined"; break;
	case 0x01: p = "EIAJ"; break;
	case 0x02: p = "A2-M"; break;
	case 0x03: p = "A2-BG"; break;
	case 0x04: p = "A2-DK1"; break;
	case 0x05: p = "A2-DK2"; break;
	case 0x06: p = "A2-DK3"; break;
	case 0x07: p = "A1 (6.0 MHz FM Mono)"; break;
	case 0x08: p = "AM-L"; break;
	case 0x09: p = "NICAM-BG"; break;
	case 0x0a: p = "NICAM-DK"; break;
	case 0x0b: p = "NICAM-I"; break;
	case 0x0c: p = "NICAM-L"; break;
	case 0x0d: p = "BTSC/EIAJ/A2-M Mono (4.5 MHz FMMono)"; break;
	case 0x0e: p = "IF FM Radio"; break;
	case 0x0f: p = "BTSC"; break;
	case 0x10: p = "high-deviation FM"; break;
	case 0x11: p = "very high-deviation FM"; break;
	case 0xfd: p = "unknown audio standard"; break;
	case 0xfe: p = "forced audio standard"; break;
	case 0xff: p = "no detected audio standard"; break;
	default: p = "not defined";
	}
	v4l_info(client, "Detected audio standard:   %s\n", p);
	v4l_info(client, "Audio muted:               %s\n",
		    (mute_ctl & 0x2) ? "yes" : "no");
	v4l_info(client, "Audio microcontroller:     %s\n",
		    (download_ctl & 0x10) ? "running" : "stopped");

	switch (audio_config >> 4) {
	case 0x00: p = "undefined"; break;
	case 0x01: p = "BTSC"; break;
	case 0x02: p = "EIAJ"; break;
	case 0x03: p = "A2-M"; break;
	case 0x04: p = "A2-BG"; break;
	case 0x05: p = "A2-DK1"; break;
	case 0x06: p = "A2-DK2"; break;
	case 0x07: p = "A2-DK3"; break;
	case 0x08: p = "A1 (6.0 MHz FM Mono)"; break;
	case 0x09: p = "AM-L"; break;
	case 0x0a: p = "NICAM-BG"; break;
	case 0x0b: p = "NICAM-DK"; break;
	case 0x0c: p = "NICAM-I"; break;
	case 0x0d: p = "NICAM-L"; break;
	case 0x0e: p = "FM radio"; break;
	case 0x0f: p = "automatic detection"; break;
	default: p = "undefined";
	}
	v4l_info(client, "Configured audio standard: %s\n", p);

	if ((audio_config >> 4) < 0xF) {
		switch (audio_config & 0xF) {
		case 0x00: p = "MONO1 (LANGUAGE A/Mono L+R channel for BTSC, EIAJ, A2)"; break;
		case 0x01: p = "MONO2 (LANGUAGE B)"; break;
		case 0x02: p = "MONO3 (STEREO forced MONO)"; break;
		case 0x03: p = "MONO4 (NICAM ANALOG-Language C/Analog Fallback)"; break;
		case 0x04: p = "STEREO"; break;
		case 0x05: p = "DUAL1 (AB)"; break;
		case 0x06: p = "DUAL2 (AC) (FM)"; break;
		case 0x07: p = "DUAL3 (BC) (FM)"; break;
		case 0x08: p = "DUAL4 (AC) (AM)"; break;
		case 0x09: p = "DUAL5 (BC) (AM)"; break;
		case 0x0a: p = "SAP"; break;
		default: p = "undefined";
		}
		v4l_info(client, "Configured audio mode:     %s\n", p);
	} else {
		switch (audio_config & 0xF) {
		case 0x00: p = "BG"; break;
		case 0x01: p = "DK1"; break;
		case 0x02: p = "DK2"; break;
		case 0x03: p = "DK3"; break;
		case 0x04: p = "I"; break;
		case 0x05: p = "L"; break;
		case 0x06: p = "BTSC"; break;
		case 0x07: p = "EIAJ"; break;
		case 0x08: p = "A2-M"; break;
		case 0x09: p = "FM Radio"; break;
		case 0x0f: p = "automatic standard and mode detection"; break;
		default: p = "undefined";
		}
		v4l_info(client, "Configured audio system:   %s\n", p);
	}

	v4l_info(client, "Specified standard:        %s\n",
		    vidfmt_sel ? fmt_strs[vidfmt_sel] : "automatic detection");

	if (vid_input >= CX25840_COMPOSITE1 &&
	    vid_input <= CX25840_COMPOSITE8) {
		v4l_info(client, "Specified video input:     Composite %d\n",
			vid_input - CX25840_COMPOSITE1 + 1);
	} else {
		v4l_info(client, "Specified video input:     S-Video (Luma In%d, Chroma In%d)\n",
			(vid_input & 0xf0) >> 4, (vid_input & 0xf00) >> 8);
	}
	if (aud_input) {
		v4l_info(client, "Specified audio input:     Tuner (In%d)\n", aud_input);
	} else {
		v4l_info(client, "Specified audio input:     External\n");
	}

	v4l_info(client, "Specified audioclock freq: %d Hz\n", state->audclk_freq);

	switch (pref_mode & 0xf) {
	case 0: p = "mono/language A"; break;
	case 1: p = "language B"; break;
	case 2: p = "language C"; break;
	case 3: p = "analog fallback"; break;
	case 4: p = "stereo"; break;
	case 5: p = "language AC"; break;
	case 6: p = "language BC"; break;
	case 7: p = "language AB"; break;
	default: p = "undefined";
	}
	v4l_info(client, "Preferred audio mode:      %s\n", p);

	if ((audio_config & 0xf) == 0xf) {
		switch ((afc0 >> 3) & 0x3) {
		case 0: p = "system DK"; break;
		case 1: p = "system L"; break;
		case 2: p = "autodetect"; break;
		default: p = "undefined";
		}
		v4l_info(client, "Selected 65 MHz format:    %s\n", p);

		switch (afc0 & 0x7) {
		case 0: p = "chroma"; break;
		case 1: p = "BTSC"; break;
		case 2: p = "EIAJ"; break;
		case 3: p = "A2-M"; break;
		case 4: p = "autodetect"; break;
		default: p = "undefined";
		}
		v4l_info(client, "Selected 45 MHz format:    %s\n", p);
	}
}