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authorAntti Palosaari <crope@iki.fi>2015-04-14 19:52:16 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-05-18 15:45:06 -0300
commit6802fc0b8126d8e2e5e982a9772d757e61e47c72 (patch)
tree5f34b4eb4bfb282c31d0efc8ce1fdefb59d7115f /drivers/media/tuners
parent0fae1997f09796aca8ada5edc028aef587f6716c (diff)
[media] fc2580: implement I2C client bindings
Add I2C client bindings to driver. Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/tuners')
-rw-r--r--drivers/media/tuners/fc2580.c101
-rw-r--r--drivers/media/tuners/fc2580.h15
-rw-r--r--drivers/media/tuners/fc2580_priv.h4
3 files changed, 110 insertions, 10 deletions
diff --git a/drivers/media/tuners/fc2580.c b/drivers/media/tuners/fc2580.c
index f0c9c42867de..d01fba8df3c0 100644
--- a/drivers/media/tuners/fc2580.c
+++ b/drivers/media/tuners/fc2580.c
@@ -47,7 +47,7 @@ static int fc2580_wr_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
u8 buf[MAX_XFER_SIZE];
struct i2c_msg msg[1] = {
{
- .addr = priv->cfg->i2c_addr,
+ .addr = priv->i2c_addr,
.flags = 0,
.len = 1 + len,
.buf = buf,
@@ -82,12 +82,12 @@ static int fc2580_rd_regs(struct fc2580_priv *priv, u8 reg, u8 *val, int len)
u8 buf[MAX_XFER_SIZE];
struct i2c_msg msg[2] = {
{
- .addr = priv->cfg->i2c_addr,
+ .addr = priv->i2c_addr,
.flags = 0,
.len = 1,
.buf = &reg,
}, {
- .addr = priv->cfg->i2c_addr,
+ .addr = priv->i2c_addr,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
@@ -182,10 +182,10 @@ static int fc2580_set_params(struct dvb_frontend *fe)
if (ret < 0)
goto err;
- if (f_vco >= 2UL * 76 * priv->cfg->clock) {
+ if (f_vco >= 2UL * 76 * priv->clk) {
r_val = 1;
r18_val = 0x00;
- } else if (f_vco >= 1UL * 76 * priv->cfg->clock) {
+ } else if (f_vco >= 1UL * 76 * priv->clk) {
r_val = 2;
r18_val = 0x10;
} else {
@@ -193,7 +193,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
r18_val = 0x20;
}
- f_ref = 2UL * priv->cfg->clock / r_val;
+ f_ref = 2UL * priv->clk / r_val;
n_val = div_u64_rem(f_vco, f_ref, &k_val);
k_val_reg = div_u64(1ULL * k_val * (1 << 20), f_ref);
@@ -213,7 +213,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
if (ret < 0)
goto err;
- if (priv->cfg->clock >= 28000000) {
+ if (priv->clk >= 28000000) {
ret = fc2580_wr_reg(priv, 0x4b, 0x22);
if (ret < 0)
goto err;
@@ -348,7 +348,7 @@ static int fc2580_set_params(struct dvb_frontend *fe)
if (ret < 0)
goto err;
- ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->cfg->clock *
+ ret = fc2580_wr_reg(priv, 0x37, div_u64(1ULL * priv->clk *
fc2580_if_filter_lut[i].mul, 1000000000));
if (ret < 0)
goto err;
@@ -510,8 +510,9 @@ struct dvb_frontend *fc2580_attach(struct dvb_frontend *fe,
goto err;
}
- priv->cfg = cfg;
+ priv->clk = cfg->clock;
priv->i2c = i2c;
+ priv->i2c_addr = cfg->i2c_addr;
/* check if the tuner is there */
ret = fc2580_rd_reg(priv, 0x01, &chip_id);
@@ -550,6 +551,88 @@ err:
}
EXPORT_SYMBOL(fc2580_attach);
+static int fc2580_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct fc2580_priv *dev;
+ struct fc2580_platform_data *pdata = client->dev.platform_data;
+ struct dvb_frontend *fe = pdata->dvb_frontend;
+ int ret;
+ u8 chip_id;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ if (pdata->clk)
+ dev->clk = pdata->clk;
+ else
+ dev->clk = 16384000; /* internal clock */
+ dev->client = client;
+ dev->i2c = client->adapter;
+ dev->i2c_addr = client->addr;
+
+ /* check if the tuner is there */
+ ret = fc2580_rd_reg(dev, 0x01, &chip_id);
+ if (ret < 0)
+ goto err_kfree;
+
+ dev_dbg(&client->dev, "chip_id=%02x\n", chip_id);
+
+ switch (chip_id) {
+ case 0x56:
+ case 0x5a:
+ break;
+ default:
+ goto err_kfree;
+ }
+
+ fe->tuner_priv = dev;
+ memcpy(&fe->ops.tuner_ops, &fc2580_tuner_ops,
+ sizeof(struct dvb_tuner_ops));
+ fe->ops.tuner_ops.release = NULL;
+ i2c_set_clientdata(client, dev);
+
+ dev_info(&client->dev, "FCI FC2580 successfully identified\n");
+ return 0;
+err_kfree:
+ kfree(dev);
+err:
+ dev_dbg(&client->dev, "failed=%d\n", ret);
+ return ret;
+}
+
+static int fc2580_remove(struct i2c_client *client)
+{
+ struct fc2580_priv *dev = i2c_get_clientdata(client);
+
+ dev_dbg(&client->dev, "\n");
+
+ kfree(dev);
+ return 0;
+}
+
+static const struct i2c_device_id fc2580_id_table[] = {
+ {"fc2580", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, fc2580_id_table);
+
+static struct i2c_driver fc2580_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "fc2580",
+ .suppress_bind_attrs = true,
+ },
+ .probe = fc2580_probe,
+ .remove = fc2580_remove,
+ .id_table = fc2580_id_table,
+};
+
+module_i2c_driver(fc2580_driver);
+
MODULE_DESCRIPTION("FCI FC2580 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");
diff --git a/drivers/media/tuners/fc2580.h b/drivers/media/tuners/fc2580.h
index b1ce6770f88e..5679e44980f9 100644
--- a/drivers/media/tuners/fc2580.h
+++ b/drivers/media/tuners/fc2580.h
@@ -24,6 +24,21 @@
#include <linux/kconfig.h>
#include "dvb_frontend.h"
+/*
+ * I2C address
+ * 0x56, ...
+ */
+
+/**
+ * struct fc2580_platform_data - Platform data for the fc2580 driver
+ * @clk: Clock frequency (0 = internal clock).
+ * @dvb_frontend: DVB frontend.
+ */
+struct fc2580_platform_data {
+ u32 clk;
+ struct dvb_frontend *dvb_frontend;
+};
+
struct fc2580_config {
/*
* I2C address
diff --git a/drivers/media/tuners/fc2580_priv.h b/drivers/media/tuners/fc2580_priv.h
index 646c99452136..a22ffc63749f 100644
--- a/drivers/media/tuners/fc2580_priv.h
+++ b/drivers/media/tuners/fc2580_priv.h
@@ -128,8 +128,10 @@ static const struct fc2580_freq_regs fc2580_freq_regs_lut[] = {
};
struct fc2580_priv {
- const struct fc2580_config *cfg;
+ u32 clk;
+ struct i2c_client *client;
struct i2c_adapter *i2c;
+ u8 i2c_addr;
};
#endif

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