#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 <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#define DRIVER_NAME "saa7706h"
#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;
struct v4l2_ctrl_handler hdl;
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[] = {
{
.addr = client->addr,
.len = sizeof(regaddr),
.buf = regaddr
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.len = sizeof(buf),
.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);
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_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct saa7706h_state *state =
container_of(ctrl->handler, struct saa7706h_state, hdl);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->val)
return saa7706h_mute(&state->sd);
return saa7706h_unmute(&state->sd);
}
return -EINVAL;
}
static const struct v4l2_ctrl_ops saa7706h_ctrl_ops = {
.s_ctrl = saa7706h_s_ctrl,
};
static const struct v4l2_subdev_ops empty_ops = {};
static int saa7706h_probe(struct i2c_client *client)
{
struct saa7706h_state *state;
struct v4l2_subdev *sd;
int err;
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 = kzalloc_obj(struct saa7706h_state);
if (state == NULL)
return -ENOMEM;
sd = &state->sd;
v4l2_i2c_subdev_init(sd, client, &empty_ops);
v4l2_ctrl_handler_init(&state->hdl, 4);
v4l2_ctrl_new_std(&state->hdl, &saa7706h_ctrl_ops,
V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
sd->ctrl_handler = &state->hdl;
err = state->hdl.error;
if (err)
goto err;
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;
err = saa7706h_mute(sd);
if (err)
goto err;
return 0;
err:
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
kfree(to_state(sd));
printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
return err;
}
static void saa7706h_remove(struct i2c_client *client)
{
struct v4l2_subdev *sd = i2c_get_clientdata(client);
struct saa7706h_state *state = to_state(sd);
saa7706h_mute(sd);
v4l2_device_unregister_subdev(sd);
v4l2_ctrl_handler_free(&state->hdl);
kfree(to_state(sd));
}
static const struct i2c_device_id saa7706h_id[] = {
{ DRIVER_NAME },
{}
};
MODULE_DEVICE_TABLE(i2c, saa7706h_id);
static struct i2c_driver saa7706h_driver = {
.driver = {
.name = DRIVER_NAME,
},
.probe = saa7706h_probe,
.remove = saa7706h_remove,
.id_table = saa7706h_id,
};
module_i2c_driver(saa7706h_driver);
MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
MODULE_AUTHOR("Mocean Laboratories");
MODULE_LICENSE("GPL v2");
