[media] cxd2820r: add I2C driver bindings

Add I2C driver bindings in order to support proper I2C driver
registration with driver core.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Antti Palosaari 2016-08-09 20:49:09 -03:00 committed by Mauro Carvalho Chehab
parent 4aa4fd86bc
commit 07fdf7d9f1
6 changed files with 192 additions and 53 deletions

View File

@ -37,6 +37,32 @@
#define CXD2820R_TS_PARALLEL 0x30
#define CXD2820R_TS_PARALLEL_MSB 0x70
/*
* I2C address: 0x6c, 0x6d
*/
/**
* struct cxd2820r_platform_data - Platform data for the cxd2820r driver
* @ts_mode: TS mode.
* @ts_clk_inv: TS clock inverted.
* @if_agc_polarity: IF AGC polarity.
* @spec_inv: Input spectrum inverted.
* @gpio_chip_base: GPIO.
* @get_dvb_frontend: Get DVB frontend.
*/
struct cxd2820r_platform_data {
u8 ts_mode;
bool ts_clk_inv;
bool if_agc_polarity;
bool spec_inv;
int **gpio_chip_base;
struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *);
/* private: For legacy media attach wrapper. Do not set value. */
bool attach_in_use;
};
struct cxd2820r_config {
/* Demodulator I2C address.
* Driver determines DVB-C slave I2C address automatically from master

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@ -42,9 +42,9 @@ int cxd2820r_set_frontend_c(struct dvb_frontend *fe)
{ 0x10059, 0x50, 0xff },
{ 0x10087, 0x0c, 0x3c },
{ 0x1008b, 0x07, 0xff },
{ 0x1001f, priv->cfg.if_agc_polarity << 7, 0x80 },
{ 0x10070, priv->cfg.ts_mode, 0xff },
{ 0x10071, !priv->cfg.ts_clock_inv << 4, 0x10 },
{ 0x1001f, priv->if_agc_polarity << 7, 0x80 },
{ 0x10070, priv->ts_mode, 0xff },
{ 0x10071, !priv->ts_clk_inv << 4, 0x10 },
};
dev_dbg(&priv->i2c->dev, "%s: frequency=%d symbol_rate=%d\n", __func__,

View File

@ -49,7 +49,7 @@ static int cxd2820r_wr_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
buf[0] = reg;
memcpy(&buf[1], val, len);
ret = i2c_transfer(priv->i2c, msg, 1);
ret = i2c_transfer(priv->client[0]->adapter, msg, 1);
if (ret == 1) {
ret = 0;
} else {
@ -87,7 +87,7 @@ static int cxd2820r_rd_regs_i2c(struct cxd2820r_priv *priv, u8 i2c, u8 reg,
return -EINVAL;
}
ret = i2c_transfer(priv->i2c, msg, 2);
ret = i2c_transfer(priv->client[0]->adapter, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
@ -112,9 +112,9 @@ int cxd2820r_wr_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
/* select I2C */
if (i2c)
i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
i2c_addr = priv->client[1]->addr; /* DVB-C */
else
i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
i2c_addr = priv->client[0]->addr; /* DVB-T/T2 */
/* switch bank if needed */
if (bank != priv->bank[i2c]) {
@ -138,9 +138,9 @@ int cxd2820r_rd_regs(struct cxd2820r_priv *priv, u32 reginfo, u8 *val,
/* select I2C */
if (i2c)
i2c_addr = priv->cfg.i2c_address | (1 << 1); /* DVB-C */
i2c_addr = priv->client[1]->addr; /* DVB-C */
else
i2c_addr = priv->cfg.i2c_address; /* DVB-T/T2 */
i2c_addr = priv->client[0]->addr; /* DVB-T/T2 */
/* switch bank if needed */
if (bank != priv->bank[i2c]) {
@ -537,16 +537,12 @@ static int cxd2820r_get_frontend_algo(struct dvb_frontend *fe)
static void cxd2820r_release(struct dvb_frontend *fe)
{
struct cxd2820r_priv *priv = fe->demodulator_priv;
struct i2c_client *client = priv->client[0];
dev_dbg(&priv->i2c->dev, "%s\n", __func__);
#ifdef CONFIG_GPIOLIB
/* remove GPIOs */
if (priv->gpio_chip.label)
gpiochip_remove(&priv->gpio_chip);
i2c_unregister_device(client);
#endif
kfree(priv);
return;
}
@ -646,49 +642,113 @@ static const struct dvb_frontend_ops cxd2820r_ops = {
.read_signal_strength = cxd2820r_read_signal_strength,
};
struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
struct i2c_adapter *i2c, int *gpio_chip_base
)
/*
* XXX: That is wrapper to cxd2820r_probe() via driver core in order to provide
* proper I2C client for legacy media attach binding.
* New users must use I2C client binding directly!
*/
struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *config,
struct i2c_adapter *adapter,
int *gpio_chip_base)
{
struct cxd2820r_priv *priv;
int ret;
u8 tmp;
struct i2c_client *client;
struct i2c_board_info board_info;
struct cxd2820r_platform_data pdata;
priv = kzalloc(sizeof(struct cxd2820r_priv), GFP_KERNEL);
pdata.ts_mode = config->ts_mode;
pdata.ts_clk_inv = config->ts_clock_inv;
pdata.if_agc_polarity = config->if_agc_polarity;
pdata.spec_inv = config->spec_inv;
pdata.gpio_chip_base = &gpio_chip_base;
pdata.attach_in_use = true;
memset(&board_info, 0, sizeof(board_info));
strlcpy(board_info.type, "cxd2820r", I2C_NAME_SIZE);
board_info.addr = config->i2c_address;
board_info.platform_data = &pdata;
client = i2c_new_device(adapter, &board_info);
if (!client || !client->dev.driver)
return NULL;
return pdata.get_dvb_frontend(client);
}
EXPORT_SYMBOL(cxd2820r_attach);
static struct dvb_frontend *cxd2820r_get_dvb_frontend(struct i2c_client *client)
{
struct cxd2820r_priv *priv = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
return &priv->fe;
}
static int cxd2820r_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct cxd2820r_platform_data *pdata = client->dev.platform_data;
struct cxd2820r_priv *priv;
int ret, *gpio_chip_base;
u8 u8tmp;
dev_dbg(&client->dev, "\n");
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
dev_err(&i2c->dev, "%s: kzalloc() failed\n",
KBUILD_MODNAME);
goto error;
goto err;
}
priv->i2c = i2c;
memcpy(&priv->cfg, cfg, sizeof(struct cxd2820r_config));
memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(struct dvb_frontend_ops));
priv->fe.demodulator_priv = priv;
priv->client[0] = client;
priv->i2c = client->adapter;
priv->ts_mode = pdata->ts_mode;
priv->ts_clk_inv = pdata->ts_clk_inv;
priv->if_agc_polarity = pdata->if_agc_polarity;
priv->spec_inv = pdata->spec_inv;
priv->bank[0] = 0xff;
priv->bank[1] = 0xff;
gpio_chip_base = *pdata->gpio_chip_base;
priv->bank[0] = priv->bank[1] = 0xff;
ret = cxd2820r_rd_reg(priv, 0x000fd, &tmp);
dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, tmp);
if (ret || tmp != 0xe1)
goto error;
/* Check demod answers with correct chip id */
ret = cxd2820r_rd_reg(priv, 0x000fd, &u8tmp);
if (ret)
goto err_kfree;
dev_dbg(&client->dev, "chip_id=%02x\n", u8tmp);
if (u8tmp != 0xe1) {
ret = -ENODEV;
goto err_kfree;
}
/*
* Chip has two I2C addresses for different register banks. We register
* one dummy I2C client in in order to get own I2C client for each
* register bank.
*/
priv->client[1] = i2c_new_dummy(client->adapter, client->addr | (1 << 1));
if (!priv->client[1]) {
ret = -ENODEV;
dev_err(&client->dev, "I2C registration failed\n");
if (ret)
goto err_kfree;
}
if (gpio_chip_base) {
#ifdef CONFIG_GPIOLIB
/* add GPIOs */
/* Add GPIOs */
priv->gpio_chip.label = KBUILD_MODNAME;
priv->gpio_chip.parent = &priv->i2c->dev;
priv->gpio_chip.owner = THIS_MODULE;
priv->gpio_chip.direction_output =
cxd2820r_gpio_direction_output;
priv->gpio_chip.direction_output = cxd2820r_gpio_direction_output;
priv->gpio_chip.set = cxd2820r_gpio_set;
priv->gpio_chip.get = cxd2820r_gpio_get;
priv->gpio_chip.base = -1; /* dynamic allocation */
priv->gpio_chip.base = -1; /* Dynamic allocation */
priv->gpio_chip.ngpio = GPIO_COUNT;
priv->gpio_chip.can_sleep = 1;
ret = gpiochip_add_data(&priv->gpio_chip, priv);
if (ret)
goto error;
goto err_client_1_i2c_unregister_device;
dev_dbg(&priv->i2c->dev, "%s: gpio_chip.base=%d\n", __func__,
priv->gpio_chip.base);
@ -705,17 +765,65 @@ struct dvb_frontend *cxd2820r_attach(const struct cxd2820r_config *cfg,
gpio[2] = 0;
ret = cxd2820r_gpio(&priv->fe, gpio);
if (ret)
goto error;
goto err_client_1_i2c_unregister_device;
#endif
}
return &priv->fe;
error:
dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
/* Create dvb frontend */
memcpy(&priv->fe.ops, &cxd2820r_ops, sizeof(priv->fe.ops));
if (!pdata->attach_in_use)
priv->fe.ops.release = NULL;
priv->fe.demodulator_priv = priv;
i2c_set_clientdata(client, priv);
/* Setup callbacks */
pdata->get_dvb_frontend = cxd2820r_get_dvb_frontend;
dev_info(&client->dev, "Sony CXD2820R successfully identified\n");
return 0;
err_client_1_i2c_unregister_device:
i2c_unregister_device(priv->client[1]);
err_kfree:
kfree(priv);
return NULL;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
EXPORT_SYMBOL(cxd2820r_attach);
static int cxd2820r_remove(struct i2c_client *client)
{
struct cxd2820r_priv *priv = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
#ifdef CONFIG_GPIOLIB
if (priv->gpio_chip.label)
gpiochip_remove(&priv->gpio_chip);
#endif
i2c_unregister_device(priv->client[1]);
kfree(priv);
return 0;
}
static const struct i2c_device_id cxd2820r_id_table[] = {
{"cxd2820r", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, cxd2820r_id_table);
static struct i2c_driver cxd2820r_driver = {
.driver = {
.name = "cxd2820r",
.suppress_bind_attrs = true,
},
.probe = cxd2820r_probe,
.remove = cxd2820r_remove,
.id_table = cxd2820r_id_table,
};
module_i2c_driver(cxd2820r_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Sony CXD2820R demodulator driver");

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@ -38,9 +38,14 @@ struct reg_val_mask {
#define CXD2820R_CLK 41000000
struct cxd2820r_priv {
struct i2c_client *client[2];
struct i2c_adapter *i2c;
struct dvb_frontend fe;
struct cxd2820r_config cfg;
u8 ts_mode;
bool ts_clk_inv;
bool if_agc_polarity;
bool spec_inv;
u64 post_bit_error_prev_dvbv3;
u64 post_bit_error;

View File

@ -45,9 +45,9 @@ int cxd2820r_set_frontend_t(struct dvb_frontend *fe)
{ 0x00085, 0x07, 0xff },
{ 0x00088, 0x01, 0xff },
{ 0x00070, priv->cfg.ts_mode, 0xff },
{ 0x00071, !priv->cfg.ts_clock_inv << 4, 0x10 },
{ 0x000cb, priv->cfg.if_agc_polarity << 6, 0x40 },
{ 0x00070, priv->ts_mode, 0xff },
{ 0x00071, !priv->ts_clk_inv << 4, 0x10 },
{ 0x000cb, priv->if_agc_polarity << 6, 0x40 },
{ 0x000a5, 0x00, 0x01 },
{ 0x00082, 0x20, 0x60 },
{ 0x000c2, 0xc3, 0xff },

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@ -45,10 +45,10 @@ int cxd2820r_set_frontend_t2(struct dvb_frontend *fe)
{ 0x0207f, 0x2a, 0xff },
{ 0x02082, 0x0a, 0xff },
{ 0x02083, 0x0a, 0xff },
{ 0x020cb, priv->cfg.if_agc_polarity << 6, 0x40 },
{ 0x02070, priv->cfg.ts_mode, 0xff },
{ 0x02071, !priv->cfg.ts_clock_inv << 6, 0x40 },
{ 0x020b5, priv->cfg.spec_inv << 4, 0x10 },
{ 0x020cb, priv->if_agc_polarity << 6, 0x40 },
{ 0x02070, priv->ts_mode, 0xff },
{ 0x02071, !priv->ts_clk_inv << 6, 0x40 },
{ 0x020b5, priv->spec_inv << 4, 0x10 },
{ 0x02567, 0x07, 0x0f },
{ 0x02569, 0x03, 0x03 },
{ 0x02595, 0x1a, 0xff },