[linux-2.6-block.git] / drivers / media / radio / saa7706h.c

/*
 * saa7706.c Philips SAA7706H Car Radio DSP driver
 * Copyright (c) 2009 Intel Corporation
 *
 * 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.
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>

#define DRIVER_NAME "saa7706h"

/* the I2C memory map looks like this

	$1C00 - $FFFF Not Used
	$2200 - $3FFF Reserved YRAM (DSP2) space
	$2000 - $21FF YRAM (DSP2)
	$1FF0 - $1FFF Hardware Registers
	$1280 - $1FEF Reserved XRAM (DSP2) space
	$1000 - $127F XRAM (DSP2)
	$0FFF        DSP CONTROL
	$0A00 - $0FFE Reserved
	$0980 - $09FF Reserved YRAM (DSP1) space
	$0800 - $097F YRAM (DSP1)
	$0200 - $07FF Not Used
	$0180 - $01FF Reserved XRAM (DSP1) space
	$0000 - $017F XRAM (DSP1)
*/

#define SAA7706H_REG_CTRL		0x0fff
#define SAA7706H_CTRL_BYP_PLL		0x0001
#define SAA7706H_CTRL_PLL_DIV_MASK	0x003e
#define SAA7706H_CTRL_PLL3_62975MHZ	0x003e
#define SAA7706H_CTRL_DSP_TURBO		0x0040
#define SAA7706H_CTRL_PC_RESET_DSP1	0x0080
#define SAA7706H_CTRL_PC_RESET_DSP2	0x0100
#define SAA7706H_CTRL_DSP1_ROM_EN_MASK	0x0600
#define SAA7706H_CTRL_DSP1_FUNC_PROM	0x0000
#define SAA7706H_CTRL_DSP2_ROM_EN_MASK	0x1800
#define SAA7706H_CTRL_DSP2_FUNC_PROM	0x0000
#define SAA7706H_CTRL_DIG_SIL_INTERPOL	0x8000

#define SAA7706H_REG_EVALUATION			0x1ff0
#define SAA7706H_EVAL_DISABLE_CHARGE_PUMP	0x000001
#define SAA7706H_EVAL_DCS_CLOCK			0x000002
#define SAA7706H_EVAL_GNDRC1_ENABLE		0x000004
#define SAA7706H_EVAL_GNDRC2_ENABLE		0x000008

#define SAA7706H_REG_CL_GEN1			0x1ff3
#define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK	0x00000f
#define SAA7706H_CL_GEN1_LOOPGAIN_MASK		0x0000f0
#define SAA7706H_CL_GEN1_COARSE_RATION		0xffff00

#define SAA7706H_REG_CL_GEN2			0x1ff4
#define SAA7706H_CL_GEN2_WSEDGE_FALLING		0x000001
#define SAA7706H_CL_GEN2_STOP_VCO		0x000002
#define SAA7706H_CL_GEN2_FRERUN			0x000004
#define SAA7706H_CL_GEN2_ADAPTIVE		0x000008
#define SAA7706H_CL_GEN2_FINE_RATIO_MASK	0x0ffff0

#define SAA7706H_REG_CL_GEN4		0x1ff6
#define SAA7706H_CL_GEN4_BYPASS_PLL1	0x001000
#define SAA7706H_CL_GEN4_PLL1_DIV_MASK	0x03e000
#define SAA7706H_CL_GEN4_DSP1_TURBO	0x040000

#define SAA7706H_REG_SEL	0x1ff7
#define SAA7706H_SEL_DSP2_SRCA_MASK	0x000007
#define SAA7706H_SEL_DSP2_FMTA_MASK	0x000031
#define SAA7706H_SEL_DSP2_SRCB_MASK	0x0001c0
#define SAA7706H_SEL_DSP2_FMTB_MASK	0x000e00
#define SAA7706H_SEL_DSP1_SRC_MASK	0x003000
#define SAA7706H_SEL_DSP1_FMT_MASK	0x01c003
#define SAA7706H_SEL_SPDIF2		0x020000
#define SAA7706H_SEL_HOST_IO_FMT_MASK	0x1c0000
#define SAA7706H_SEL_EN_HOST_IO		0x200000

#define SAA7706H_REG_IAC		0x1ff8
#define SAA7706H_REG_CLK_SET		0x1ff9
#define SAA7706H_REG_CLK_COEFF		0x1ffa
#define SAA7706H_REG_INPUT_SENS		0x1ffb
#define SAA7706H_INPUT_SENS_RDS_VOL_MASK	0x0003f
#define SAA7706H_INPUT_SENS_FM_VOL_MASK		0x00fc0
#define SAA7706H_INPUT_SENS_FM_MPX		0x01000
#define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN	0x02000
#define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN	0x04000
#define SAA7706H_REG_PHONE_NAV_AUDIO	0x1ffc
#define SAA7706H_REG_IO_CONF_DSP2	0x1ffd
#define SAA7706H_REG_STATUS_DSP2	0x1ffe
#define SAA7706H_REG_PC_DSP2		0x1fff

#define SAA7706H_DSP1_MOD0	0x0800
#define SAA7706H_DSP1_ROM_VER	0x097f
#define SAA7706H_DSP2_MPTR0	0x1000

#define SAA7706H_DSP1_MODPNTR	0x0000

#define SAA7706H_DSP2_XMEM_CONTLLCW	0x113e
#define SAA7706H_DSP2_XMEM_BUSAMP	0x114a
#define SAA7706H_DSP2_XMEM_FDACPNTR	0x11f9
#define SAA7706H_DSP2_XMEM_IIS1PNTR	0x11fb

#define SAA7706H_DSP2_YMEM_PVGA		0x212a
#define SAA7706H_DSP2_YMEM_PVAT1	0x212b
#define SAA7706H_DSP2_YMEM_PVAT		0x212c
#define SAA7706H_DSP2_YMEM_ROM_VER	0x21ff

#define SUPPORTED_DSP1_ROM_VER		0x667

struct saa7706h_state {
	struct v4l2_subdev sd;
	unsigned muted;
};

static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd)
{
	return container_of(sd, struct saa7706h_state, sd);
}

static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len)
{
	int err = i2c_master_send(client, data, len);
	if (err == len)
		return 0;
	return err > 0 ? -EIO : err;
}

static int saa7706h_i2c_transfer(struct i2c_client *client,
	struct i2c_msg *msgs, int num)
{
	int err = i2c_transfer(client->adapter, msgs, num);
	if (err == num)
		return 0;
	return err > 0 ? -EIO : err;
}

static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[5];
	int pos = 0;

	buf[pos++] = reg >> 8;
	buf[pos++] = reg;
	buf[pos++] = val >> 16;
	buf[pos++] = val >> 8;
	buf[pos++] = val;

	return saa7706h_i2c_send(client, buf, pos);
}

static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
	int *err)
{
	return *err ? *err : saa7706h_set_reg24(sd, reg, val);
}

static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[4];
	int pos = 0;

	buf[pos++] = reg >> 8;
	buf[pos++] = reg;
	buf[pos++] = val >> 8;
	buf[pos++] = val;

	return saa7706h_i2c_send(client, buf, pos);
}

static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
	int *err)
{
	return *err ? *err : saa7706h_set_reg16(sd, reg, val);
}

static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);
	u8 buf[2];
	int err;
	u8 regaddr[] = {reg >> 8, reg};
	struct i2c_msg msg[] = { {client->addr, 0, sizeof(regaddr), regaddr},
				{client->addr, I2C_M_RD, sizeof(buf), buf} };

	err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
	if (err)
		return err;

	return buf[0] << 8 | buf[1];
}

static int saa7706h_unmute(struct v4l2_subdev *sd)
{
	struct saa7706h_state *state = to_state(sd);
	int err = 0;

	err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
		SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
		SAA7706H_CTRL_PC_RESET_DSP2, &err);

	/* newer versions of the chip requires a small sleep after reset */
	msleep(1);

	err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
		SAA7706H_CTRL_PLL3_62975MHZ, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
		SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
		0x0e22ff, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);

	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
		&err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
		&err);

	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);

	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
		&err);

	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);

	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
		&err);
	if (!err)
		state->muted = 0;
	return err;
}

static int saa7706h_mute(struct v4l2_subdev *sd)
{
	struct saa7706h_state *state = to_state(sd);
	int err;

	err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
		SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
		SAA7706H_CTRL_PC_RESET_DSP2);
	if (!err)
		state->muted = 1;
	return err;
}

static int saa7706h_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
	switch (qc->id) {
	case V4L2_CID_AUDIO_MUTE:
		return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
	}
	return -EINVAL;
}

static int saa7706h_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	struct saa7706h_state *state = to_state(sd);

	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		ctrl->value = state->muted;
		return 0;
	}
	return -EINVAL;
}

static int saa7706h_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
	switch (ctrl->id) {
	case V4L2_CID_AUDIO_MUTE:
		if (ctrl->value)
			return saa7706h_mute(sd);
		return saa7706h_unmute(sd);
	}
	return -EINVAL;
}

static int saa7706h_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_SAA7706H, 0);
}

static const struct v4l2_subdev_core_ops saa7706h_core_ops = {
	.g_chip_ident = saa7706h_g_chip_ident,
	.queryctrl = saa7706h_queryctrl,
	.g_ctrl = saa7706h_g_ctrl,
	.s_ctrl = saa7706h_s_ctrl,
};

static const struct v4l2_subdev_ops saa7706h_ops = {
	.core = &saa7706h_core_ops,
};

/*
 * Generic i2c probe
 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 */

static int __devinit saa7706h_probe(struct i2c_client *client,
			const struct i2c_device_id *id)
{
	struct saa7706h_state *state;
	struct v4l2_subdev *sd;
	int err;

	/* Check if the adapter supports the needed features */
	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EIO;

	v4l_info(client, "chip found @ 0x%02x (%s)\n",
			client->addr << 1, client->adapter->name);

	state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
	if (state == NULL)
		return -ENOMEM;
	sd = &state->sd;
	v4l2_i2c_subdev_init(sd, client, &saa7706h_ops);

	/* check the rom versions */
	err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
	if (err < 0)
		goto err;
	if (err != SUPPORTED_DSP1_ROM_VER)
		v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);

	state->muted = 1;

	/* startup in a muted state */
	err = saa7706h_mute(sd);
	if (err)
		goto err;

	return 0;

err:
	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));

	printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);

	return err;
}

static int __devexit saa7706h_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	saa7706h_mute(sd);
	v4l2_device_unregister_subdev(sd);
	kfree(to_state(sd));
	return 0;
}

static const struct i2c_device_id saa7706h_id[] = {
	{DRIVER_NAME, 0},
	{},
};

MODULE_DEVICE_TABLE(i2c, saa7706h_id);

static struct i2c_driver saa7706h_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= DRIVER_NAME,
	},
	.probe		= saa7706h_probe,
	.remove		= saa7706h_remove,
	.id_table	= saa7706h_id,
};

static __init int saa7706h_init(void)
{
	return i2c_add_driver(&saa7706h_driver);
}

static __exit void saa7706h_exit(void)
{
	i2c_del_driver(&saa7706h_driver);
}

module_init(saa7706h_init);
module_exit(saa7706h_exit);

MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
MODULE_AUTHOR("Mocean Laboratories");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
ee4b9dbb RR	1	/*
	2	* saa7706.c Philips SAA7706H Car Radio DSP driver
	3	* Copyright (c) 2009 Intel Corporation
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	17	*/
	18
	19	#include <linux/module.h>
	20	#include <linux/init.h>
	21	#include <linux/delay.h>
	22	#include <linux/errno.h>
	23	#include <linux/kernel.h>
	24	#include <linux/interrupt.h>
	25	#include <linux/i2c.h>
	26	#include <media/v4l2-device.h>
	27	#include <media/v4l2-chip-ident.h>
	28
	29	#define DRIVER_NAME "saa7706h"
	30
	31	/* the I2C memory map looks like this
	32
	33	$1C00 - $FFFF Not Used
	34	$2200 - $3FFF Reserved YRAM (DSP2) space
	35	$2000 - $21FF YRAM (DSP2)
	36	$1FF0 - $1FFF Hardware Registers
	37	$1280 - $1FEF Reserved XRAM (DSP2) space
	38	$1000 - $127F XRAM (DSP2)
	39	$0FFF DSP CONTROL
	40	$0A00 - $0FFE Reserved
	41	$0980 - $09FF Reserved YRAM (DSP1) space
	42	$0800 - $097F YRAM (DSP1)
	43	$0200 - $07FF Not Used
	44	$0180 - $01FF Reserved XRAM (DSP1) space
	45	$0000 - $017F XRAM (DSP1)
	46	*/
	47
	48	#define SAA7706H_REG_CTRL 0x0fff
	49	#define SAA7706H_CTRL_BYP_PLL 0x0001
	50	#define SAA7706H_CTRL_PLL_DIV_MASK 0x003e
	51	#define SAA7706H_CTRL_PLL3_62975MHZ 0x003e
	52	#define SAA7706H_CTRL_DSP_TURBO 0x0040
	53	#define SAA7706H_CTRL_PC_RESET_DSP1 0x0080
	54	#define SAA7706H_CTRL_PC_RESET_DSP2 0x0100
	55	#define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600
	56	#define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000
	57	#define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800
	58	#define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000
	59	#define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000
	60
	61	#define SAA7706H_REG_EVALUATION 0x1ff0
	62	#define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001
	63	#define SAA7706H_EVAL_DCS_CLOCK 0x000002
	64	#define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004
65	#define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008
66
67	#define SAA7706H_REG_CL_GEN1 0x1ff3
68	#define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f
69	#define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0
70	#define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00
71
72	#define SAA7706H_REG_CL_GEN2 0x1ff4
73	#define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001
74	#define SAA7706H_CL_GEN2_STOP_VCO 0x000002
75	#define SAA7706H_CL_GEN2_FRERUN 0x000004
76	#define SAA7706H_CL_GEN2_ADAPTIVE 0x000008
77	#define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0
78
79	#define SAA7706H_REG_CL_GEN4 0x1ff6
80	#define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000
81	#define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000
82	#define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000
83
84	#define SAA7706H_REG_SEL 0x1ff7
85	#define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007
86	#define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031
87	#define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0
88	#define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00
89	#define SAA7706H_SEL_DSP1_SRC_MASK 0x003000
90	#define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003
91	#define SAA7706H_SEL_SPDIF2 0x020000
92	#define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000
93	#define SAA7706H_SEL_EN_HOST_IO 0x200000
94
95	#define SAA7706H_REG_IAC 0x1ff8
96	#define SAA7706H_REG_CLK_SET 0x1ff9
97	#define SAA7706H_REG_CLK_COEFF 0x1ffa
98	#define SAA7706H_REG_INPUT_SENS 0x1ffb
99	#define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f
100	#define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0
101	#define SAA7706H_INPUT_SENS_FM_MPX 0x01000
102	#define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000
103	#define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000
104	#define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc
105	#define SAA7706H_REG_IO_CONF_DSP2 0x1ffd
106	#define SAA7706H_REG_STATUS_DSP2 0x1ffe
107	#define SAA7706H_REG_PC_DSP2 0x1fff
108
109	#define SAA7706H_DSP1_MOD0 0x0800
110	#define SAA7706H_DSP1_ROM_VER 0x097f
111	#define SAA7706H_DSP2_MPTR0 0x1000
112
113	#define SAA7706H_DSP1_MODPNTR 0x0000
114
115	#define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e
116	#define SAA7706H_DSP2_XMEM_BUSAMP 0x114a
117	#define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9
118	#define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb
119
120	#define SAA7706H_DSP2_YMEM_PVGA 0x212a
121	#define SAA7706H_DSP2_YMEM_PVAT1 0x212b
122	#define SAA7706H_DSP2_YMEM_PVAT 0x212c
123	#define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff
124
125	#define SUPPORTED_DSP1_ROM_VER 0x667
126
127	struct saa7706h_state {
128	struct v4l2_subdev sd;
129	unsigned muted;
130	};
131
132	static inline struct saa7706h_state to_state(struct v4l2_subdev sd)
133	{
134	return container_of(sd, struct saa7706h_state, sd);
135	}
136
137	static int saa7706h_i2c_send(struct i2c_client client, const u8 data, int len)
138	{
139	int err = i2c_master_send(client, data, len);
140	if (err == len)
141	return 0;
142	return err > 0 ? -EIO : err;
143	}
144
145	static int saa7706h_i2c_transfer(struct i2c_client *client,
146	struct i2c_msg *msgs, int num)
147	{
148	int err = i2c_transfer(client->adapter, msgs, num);
149	if (err == num)
150	return 0;
151	return err > 0 ? -EIO : err;
152	}
153
154	static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
155	{
156	struct i2c_client *client = v4l2_get_subdevdata(sd);
157	u8 buf[5];
158	int pos = 0;
159
160	buf[pos++] = reg >> 8;
161	buf[pos++] = reg;
162	buf[pos++] = val >> 16;
163	buf[pos++] = val >> 8;
164	buf[pos++] = val;
165
166	return saa7706h_i2c_send(client, buf, pos);
167	}
168
169	static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
170	int *err)
171	{
172	return err ? err : saa7706h_set_reg24(sd, reg, val);
173	}
174
175	static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
176	{
177	struct i2c_client *client = v4l2_get_subdevdata(sd);
178	u8 buf[4];
179	int pos = 0;
180
181	buf[pos++] = reg >> 8;
182	buf[pos++] = reg;
183	buf[pos++] = val >> 8;
184	buf[pos++] = val;
185
186	return saa7706h_i2c_send(client, buf, pos);
187	}
188
189	static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
190	int *err)
191	{
192	return err ? err : saa7706h_set_reg16(sd, reg, val);
193	}
194
195	static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
196	{
197	struct i2c_client *client = v4l2_get_subdevdata(sd);
198	u8 buf[2];
199	int err;
200	u8 regaddr[] = {reg >> 8, reg};
201	struct i2c_msg msg[] = { {client->addr, 0, sizeof(regaddr), regaddr},
202	{client->addr, I2C_M_RD, sizeof(buf), buf} };
203
204	err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
205	if (err)
206	return err;
207
208	return buf[0] << 8 \| buf[1];
209	}
210
211	static int saa7706h_unmute(struct v4l2_subdev *sd)
212	{
213	struct saa7706h_state *state = to_state(sd);
214	int err = 0;
215
216	err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
217	SAA7706H_CTRL_PLL3_62975MHZ \| SAA7706H_CTRL_PC_RESET_DSP1 \|
218	SAA7706H_CTRL_PC_RESET_DSP2, &err);
219
220	/* newer versions of the chip requires a small sleep after reset */
221	msleep(1);
222
223	err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
224	SAA7706H_CTRL_PLL3_62975MHZ, &err);
225
226	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);
227
228	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);
229
230	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
231	SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);
232
233	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);
234
235	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);
236
237	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);
238
239	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);
240
241	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
242	&err);
243
244	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
245	&err);
246
247	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
248	0x0e22ff, &err);
249
250	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
251	&err);
252
253	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
254	&err);
255
256	err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);
257
258	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);
259
260	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);
261
262	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);
263
264	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);
265
266	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
267	&err);
268
269	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
270	&err);
271
272	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
273	&err);
274
275	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
276	&err);
277
278	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
279	&err);
280
281	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);
282
283	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
284	&err);
285
286	err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);
287
288	err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
289	&err);
290	if (!err)
291	state->muted = 0;
292	return err;
293	}
294
295	static int saa7706h_mute(struct v4l2_subdev *sd)
296	{
297	struct saa7706h_state *state = to_state(sd);
298	int err;
299
300	err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
301	SAA7706H_CTRL_PLL3_62975MHZ \| SAA7706H_CTRL_PC_RESET_DSP1 \|
302	SAA7706H_CTRL_PC_RESET_DSP2);
303	if (!err)
304	state->muted = 1;
305	return err;
306	}
307
308	static int saa7706h_queryctrl(struct v4l2_subdev sd, struct v4l2_queryctrl qc)
309	{
310	switch (qc->id) {
311	case V4L2_CID_AUDIO_MUTE:
312	return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
313	}
314	return -EINVAL;
315	}
316
317	static int saa7706h_g_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
318	{
319	struct saa7706h_state *state = to_state(sd);
320
321	switch (ctrl->id) {
322	case V4L2_CID_AUDIO_MUTE:
323	ctrl->value = state->muted;
324	return 0;
325	}
326	return -EINVAL;
327	}
328
329	static int saa7706h_s_ctrl(struct v4l2_subdev sd, struct v4l2_control ctrl)
330	{
331	switch (ctrl->id) {
332	case V4L2_CID_AUDIO_MUTE:
333	if (ctrl->value)
334	return saa7706h_mute(sd);
335	return saa7706h_unmute(sd);
336	}
337	return -EINVAL;
338	}
339
340	static int saa7706h_g_chip_ident(struct v4l2_subdev *sd,
341	struct v4l2_dbg_chip_ident *chip)
342	{
343	struct i2c_client *client = v4l2_get_subdevdata(sd);
344
345	return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7706H, 0);
346	}
347
348	static const struct v4l2_subdev_core_ops saa7706h_core_ops = {
349	.g_chip_ident = saa7706h_g_chip_ident,
350	.queryctrl = saa7706h_queryctrl,
351	.g_ctrl = saa7706h_g_ctrl,
352	.s_ctrl = saa7706h_s_ctrl,
353	};
354
355	static const struct v4l2_subdev_ops saa7706h_ops = {
356	.core = &saa7706h_core_ops,
357	};
358
359	/*
360	* Generic i2c probe
361	* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
362	*/
363
364	static int __devinit saa7706h_probe(struct i2c_client *client,
365	const struct i2c_device_id *id)
366	{
367	struct saa7706h_state *state;
368	struct v4l2_subdev *sd;
369	int err;
370
371	/* Check if the adapter supports the needed features */
372	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
373	return -EIO;
374
375	v4l_info(client, "chip found @ 0x%02x (%s)\n",
376	client->addr << 1, client->adapter->name);
377
378	state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
379	if (state == NULL)
380	return -ENOMEM;
381	sd = &state->sd;
382	v4l2_i2c_subdev_init(sd, client, &saa7706h_ops);
383
384	/* check the rom versions */
385	err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
386	if (err < 0)
387	goto err;
388	if (err != SUPPORTED_DSP1_ROM_VER)
389	v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);
390
391	state->muted = 1;
392
393	/* startup in a muted state */
394	err = saa7706h_mute(sd);
395	if (err)
396	goto err;
397
398	return 0;
399
400	err:
401	v4l2_device_unregister_subdev(sd);
402	kfree(to_state(sd));
403
404	printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
405
406	return err;
407	}
408
409	static int __devexit saa7706h_remove(struct i2c_client *client)
410	{
411	struct v4l2_subdev *sd = i2c_get_clientdata(client);
412
413	saa7706h_mute(sd);
414	v4l2_device_unregister_subdev(sd);
415	kfree(to_state(sd));
416	return 0;
417	}
418
419	static const struct i2c_device_id saa7706h_id[] = {
420	{DRIVER_NAME, 0},
421	{},
422	};
423
424	MODULE_DEVICE_TABLE(i2c, saa7706h_id);
425
426	static struct i2c_driver saa7706h_driver = {
427	.driver = {
428	.owner = THIS_MODULE,
429	.name = DRIVER_NAME,
430	},
431	.probe = saa7706h_probe,
432	.remove = saa7706h_remove,
433	.id_table = saa7706h_id,
434	};
435
436	static __init int saa7706h_init(void)
437	{
438	return i2c_add_driver(&saa7706h_driver);
439	}
440
441	static __exit void saa7706h_exit(void)
442	{
443	i2c_del_driver(&saa7706h_driver);
444	}
445
446	module_init(saa7706h_init);
447	module_exit(saa7706h_exit);
448
449	MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
450	MODULE_AUTHOR("Mocean Laboratories");
451	MODULE_LICENSE("GPL v2");