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[media] mn88472: convert driver to I2C client 

It uses I2C bus so better to implement it as a standard I2C driver
model. It was using proprietary DVB binding.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Antti Palosaari 2014-10-26 23:01:07 -03:00 committed by Mauro Carvalho Chehab
parent 0186e434a7
commit 528af1952e
3 changed files with 177 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

265
drivers/media/dvb-frontends/mn88472.c
View File

@ -40,13 +40,13 @@ static int mn88472_wregs(struct mn88472_dev *dev, u16 reg, const u8 *val, int le
buf[0] = (reg >> 0) & 0xff;
memcpy(&buf[1], val, len);
ret = i2c_transfer(dev->i2c, msg, 1);
ret = i2c_transfer(dev->client[0]->adapter, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&dev->i2c->dev,
"%s: i2c wr failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
dev_warn(&dev->client[0]->dev,
"i2c wr failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
@ -79,14 +79,14 @@ static int mn88472_rregs(struct mn88472_dev *dev, u16 reg, u8 *val, int len)
buf[0] = (reg >> 0) & 0xff;
ret = i2c_transfer(dev->i2c, msg, 2);
ret = i2c_transfer(dev->client[0]->adapter, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
dev_warn(&dev->i2c->dev,
"%s: i2c rd failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
dev_warn(&dev->client[0]->dev,
"i2c rd failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
@ -114,13 +114,15 @@ static int mn88472_get_tune_settings(struct dvb_frontend *fe,
static int mn88472_set_frontend(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u32 if_frequency = 0;
dev_dbg(&dev->i2c->dev,
"%s: delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",
__func__, c->delivery_system, c->modulation,
dev_dbg(&client->dev,
"delivery_system=%d modulation=%d frequency=%d symbol_rate=%d inversion=%d\n",
c->delivery_system, c->modulation,
c->frequency, c->symbol_rate, c->inversion);
if (!dev->warm) {
@ -140,13 +142,12 @@ static int mn88472_set_frontend(struct dvb_frontend *fe)
if (ret)
goto err;
dev_dbg(&dev->i2c->dev, "%s: get_if_frequency=%d\n",
__func__, if_frequency);
dev_dbg(&client->dev, "get_if_frequency=%d\n", if_frequency);
}
if (if_frequency != 5070000) {
dev_err(&dev->i2c->dev, "%s: IF frequency %d not supported\n",
KBUILD_MODNAME, if_frequency);
dev_err(&client->dev, "IF frequency %d not supported\n",
if_frequency);
ret = -EINVAL;
goto err;
}
@ -212,13 +213,14 @@ static int mn88472_set_frontend(struct dvb_frontend *fe)
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct mn88472_dev *dev = fe->demodulator_priv;
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
int ret;
u8 u8tmp;
@ -239,17 +241,19 @@ static int mn88472_read_status(struct dvb_frontend *fe, fe_status_t *status)
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_init(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
int ret, len, remaining;
const struct firmware *fw = NULL;
u8 *fw_file = MN88472_FIRMWARE;
dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
dev_dbg(&client->dev, "\n");
/* set cold state by default */
dev->warm = false;
@ -264,32 +268,31 @@ static int mn88472_init(struct dvb_frontend *fe)
goto err;
/* request the firmware, this will block and timeout */
ret = request_firmware(&fw, fw_file, dev->i2c->dev.parent);
ret = request_firmware(&fw, fw_file, &client->dev);
if (ret) {
dev_err(&dev->i2c->dev, "%s: firmare file '%s' not found\n",
KBUILD_MODNAME, fw_file);
dev_err(&client->dev, "firmare file '%s' not found\n",
fw_file);
goto err;
}
dev_info(&dev->i2c->dev, "%s: downloading firmware from file '%s'\n",
KBUILD_MODNAME, fw_file);
dev_info(&client->dev, "downloading firmware from file '%s'\n",
fw_file);
ret = mn88472_wreg(dev, 0x18f5, 0x03);
if (ret)
goto err;
for (remaining = fw->size; remaining > 0;
remaining -= (dev->cfg->i2c_wr_max - 1)) {
remaining -= (dev->i2c_wr_max - 1)) {
len = remaining;
if (len > (dev->cfg->i2c_wr_max - 1))
len = (dev->cfg->i2c_wr_max - 1);
if (len > (dev->i2c_wr_max - 1))
len = (dev->i2c_wr_max - 1);
ret = mn88472_wregs(dev, 0x18f6,
&fw->data[fw->size - remaining], len);
if (ret) {
dev_err(&dev->i2c->dev,
"%s: firmware download failed=%d\n",
KBUILD_MODNAME, ret);
dev_err(&client->dev,
"firmware download failed=%d\n", ret);
goto err;
}
}
@ -309,15 +312,17 @@ err:
if (fw)
release_firmware(fw);
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_sleep(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
struct i2c_client *client = fe->demodulator_priv;
struct mn88472_dev *dev = i2c_get_clientdata(client);
int ret;
dev_dbg(&dev->i2c->dev, "%s:\n", __func__);
dev_dbg(&client->dev, "\n");
/* power off */
ret = mn88472_wreg(dev, 0x1c0b, 0x30);
@ -332,92 +337,150 @@ static int mn88472_sleep(struct dvb_frontend *fe)
return 0;
err:
dev_dbg(&dev->i2c->dev, "%s: failed=%d\n", __func__, ret);
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static void mn88472_release(struct dvb_frontend *fe)
{
struct mn88472_dev *dev = fe->demodulator_priv;
kfree(dev);
}
struct dvb_frontend *mn88472_attach(const struct mn88472_config *cfg,
struct i2c_adapter *i2c)
{
int ret;
struct mn88472_dev *dev;
u8 u8tmp;
dev_dbg(&i2c->dev, "%s:\n", __func__);
/* allocate memory for the internal state */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
goto err;
}
dev->cfg = cfg;
dev->i2c = i2c;
/* check demod responds to I2C */
ret = mn88472_rreg(dev, 0x1c00, &u8tmp);
if (ret)
goto err;
/* create dvb_frontend */
memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = dev;
return &dev->fe;
err:
dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
kfree(dev);
return NULL;
}
EXPORT_SYMBOL(mn88472_attach);
static struct dvb_frontend_ops mn88472_ops = {
.delsys = {SYS_DVBC_ANNEX_A},
.info = {
.name = "Panasonic MN88472",
.caps = FE_CAN_FEC_1_2 |
FE_CAN_FEC_2_3 |
FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 |
FE_CAN_FEC_7_8 |
FE_CAN_FEC_AUTO |
FE_CAN_QPSK |
FE_CAN_QAM_16 |
FE_CAN_QAM_32 |
FE_CAN_QAM_64 |
FE_CAN_QAM_128 |
FE_CAN_QAM_256 |
FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO |
FE_CAN_MUTE_TS |
FE_CAN_2G_MODULATION |
.caps = FE_CAN_FEC_1_2 |
FE_CAN_FEC_2_3 |
FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 |
FE_CAN_FEC_7_8 |
FE_CAN_FEC_AUTO |
FE_CAN_QPSK |
FE_CAN_QAM_16 |
FE_CAN_QAM_32 |
FE_CAN_QAM_64 |
FE_CAN_QAM_128 |
FE_CAN_QAM_256 |
FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO |
FE_CAN_MUTE_TS |
FE_CAN_2G_MODULATION |
FE_CAN_MULTISTREAM
},
.release = mn88472_release,
.get_tune_settings = mn88472_get_tune_settings,
.init = mn88472_init,
.sleep = mn88472_sleep,
.set_frontend = mn88472_set_frontend,
/* .get_frontend = mn88472_get_frontend, */
.read_status = mn88472_read_status,
/* .read_snr = mn88472_read_snr, */
};
static int mn88472_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct mn88472_config *config = client->dev.platform_data;
struct mn88472_dev *dev;
int ret;
u8 u8tmp;
dev_dbg(&client->dev, "\n");
/* Caller really need to provide pointer for frontend we create. */
if (config->fe == NULL) {
dev_err(&client->dev, "frontend pointer not defined\n");
ret = -EINVAL;
goto err;
}
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
goto err;
}
dev->client[0] = client;
dev->i2c_wr_max = config->i2c_wr_max;
/* check demod answers to I2C */
ret = mn88472_rreg(dev, 0x1c00, &u8tmp);
if (ret)
goto err_kfree;
/*
* Chip has three I2C addresses for different register pages. Used
* addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
* 0x1a and 0x1c, in order to get own I2C client for each register page.
*/
dev->client[1] = i2c_new_dummy(client->adapter, 0x1a);
if (dev->client[1] == NULL) {
ret = -ENODEV;
dev_err(&client->dev, "I2C registration failed\n");
if (ret)
goto err_kfree;
}
i2c_set_clientdata(dev->client[1], dev);
dev->client[2] = i2c_new_dummy(client->adapter, 0x1c);
if (dev->client[2] == NULL) {
ret = -ENODEV;
dev_err(&client->dev, "2nd I2C registration failed\n");
if (ret)
goto err_client_1_i2c_unregister_device;
}
i2c_set_clientdata(dev->client[2], dev);
/* create dvb_frontend */
memcpy(&dev->fe.ops, &mn88472_ops, sizeof(struct dvb_frontend_ops));
dev->fe.demodulator_priv = client;
*config->fe = &dev->fe;
i2c_set_clientdata(client, dev);
dev_info(&client->dev, "Panasonic MN88472 successfully attached\n");
return 0;
err_client_1_i2c_unregister_device:
i2c_unregister_device(dev->client[1]);
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int mn88472_remove(struct i2c_client *client)
{
struct mn88472_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
i2c_unregister_device(dev->client[2]);
i2c_unregister_device(dev->client[1]);
kfree(dev);
return 0;
}
static const struct i2c_device_id mn88472_id_table[] = {
{"mn88472", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, mn88472_id_table);
static struct i2c_driver mn88472_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "mn88472",
},
.probe = mn88472_probe,
.remove = mn88472_remove,
.id_table = mn88472_id_table,
};
module_i2c_driver(mn88472_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Panasonic MN88472 DVB-T/T2/C demodulator driver");
MODULE_LICENSE("GPL");

30
drivers/media/dvb-frontends/mn88472.h
View File

@ -21,26 +21,18 @@
struct mn88472_config {
/*
* max bytes I2C client could write
* Value must be set.
* Max num of bytes given I2C adapter could write at once.
* Default: none
*/
int i2c_wr_max;
u16 i2c_wr_max;
/* Everything after that is returned by the driver. */
/*
* DVB frontend.
*/
struct dvb_frontend **fe;
};
#if IS_ENABLED(CONFIG_DVB_MN88472)
extern struct dvb_frontend *mn88472_attach(
const struct mn88472_config *cfg,
struct i2c_adapter *i2c
);
#else
static inline struct dvb_frontend *mn88472_attach(
const struct mn88472_config *cfg,
struct i2c_adapter *i2c
)
{
dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
#endif
#endif

6
drivers/media/dvb-frontends/mn88472_priv.h
View File

@ -19,16 +19,14 @@
#include "dvb_frontend.h"
#include "mn88472.h"
#include "dvb_math.h"
#include <linux/firmware.h>
#include <linux/i2c-mux.h>
#define MN88472_FIRMWARE "dvb-demod-mn88472-02.fw"
struct mn88472_dev {
struct i2c_adapter *i2c;
const struct mn88472_config *cfg;
struct i2c_client *client[3];
struct dvb_frontend fe;
u16 i2c_wr_max;
fe_delivery_system_t delivery_system;
bool warm; /* FW running */
};