Driver conversion from proprietary DVB tuner model to more
general I2C driver model.
Cc: Jean Delvare <khali@xxxxxxxxxxxx>
Cc: Mauro Carvalho Chehab <m.chehab@xxxxxxxxxxx>
Signed-off-by: Antti Palosaari <crope@xxxxxx>
---
drivers/media/tuners/e4000.c | 115 ++++++++++++++++++++------------
drivers/media/tuners/e4000.h | 21 ++----
drivers/media/tuners/e4000_priv.h | 5 +-
drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 56 +++++++++++++---
drivers/media/usb/dvb-usb-v2/rtl28xxu.h | 1 +
5 files changed, 126 insertions(+), 72 deletions(-)
diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
index 40c1da7..0153169 100644
--- a/drivers/media/tuners/e4000.c
+++ b/drivers/media/tuners/e4000.c
@@ -31,7 +31,7 @@ static int e4000_wr_regs(struct e4000_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->client->addr,
.flags = 0,
.len = 1 + len,
.buf = buf,
@@ -39,7 +39,7 @@ static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
};
if (1 + len > sizeof(buf)) {
- dev_warn(&priv->i2c->dev,
+ dev_warn(&priv->client->dev,
"%s: i2c wr reg=%04x: len=%d is too big!\n",
KBUILD_MODNAME, reg, len);
return -EINVAL;
@@ -48,11 +48,11 @@ static int e4000_wr_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
buf[0] = reg;
memcpy(&buf[1], val, len);
- ret = i2c_transfer(priv->i2c, msg, 1);
+ ret = i2c_transfer(priv->client->adapter, msg, 1);
if (ret == 1) {
ret = 0;
} else {
- dev_warn(&priv->i2c->dev,
+ dev_warn(&priv->client->dev,
"%s: i2c wr failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
@@ -67,12 +67,12 @@ static int e4000_rd_regs(struct e4000_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->client->addr,
.flags = 0,
.len = 1,
.buf = ®,
}, {
- .addr = priv->cfg->i2c_addr,
+ .addr = priv->client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = buf,
@@ -80,18 +80,18 @@ static int e4000_rd_regs(struct e4000_priv *priv, u8 reg, u8 *val, int len)
};
if (len > sizeof(buf)) {
- dev_warn(&priv->i2c->dev,
+ dev_warn(&priv->client->dev,
"%s: i2c rd reg=%04x: len=%d is too big!\n",
KBUILD_MODNAME, reg, len);
return -EINVAL;
}
- ret = i2c_transfer(priv->i2c, msg, 2);
+ ret = i2c_transfer(priv->client->adapter, msg, 2);
if (ret == 2) {
memcpy(val, buf, len);
ret = 0;
} else {
- dev_warn(&priv->i2c->dev,
+ dev_warn(&priv->client->dev,
"%s: i2c rd failed=%d reg=%02x len=%d\n",
KBUILD_MODNAME, ret, reg, len);
ret = -EREMOTEIO;
@@ -117,7 +117,7 @@ static int e4000_init(struct dvb_frontend *fe)
struct e4000_priv *priv = fe->tuner_priv;
int ret;
- dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+ dev_dbg(&priv->client->dev, "%s:\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
@@ -186,7 +186,7 @@ err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
@@ -195,7 +195,7 @@ static int e4000_sleep(struct dvb_frontend *fe)
struct e4000_priv *priv = fe->tuner_priv;
int ret;
- dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+ dev_dbg(&priv->client->dev, "%s:\n", __func__);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
@@ -212,7 +212,7 @@ err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
@@ -224,7 +224,7 @@ static int e4000_set_params(struct dvb_frontend *fe)
unsigned int f_vco;
u8 buf[5], i_data[4], q_data[4];
- dev_dbg(&priv->i2c->dev,
+ dev_dbg(&priv->client->dev,
"%s: delivery_system=%d frequency=%d bandwidth_hz=%d\n",
__func__, c->delivery_system, c->frequency,
c->bandwidth_hz);
@@ -253,14 +253,15 @@ static int e4000_set_params(struct dvb_frontend *fe)
* or more.
*/
f_vco = c->frequency * e4000_pll_lut[i].mul;
- sigma_delta = div_u64(0x10000ULL * (f_vco % priv->cfg->clock), priv->cfg->clock);
- buf[0] = f_vco / priv->cfg->clock;
+ sigma_delta = div_u64(0x10000ULL * (f_vco % priv->clock), priv->clock);
+ buf[0] = f_vco / priv->clock;
buf[1] = (sigma_delta >> 0) & 0xff;
buf[2] = (sigma_delta >> 8) & 0xff;
buf[3] = 0x00;
buf[4] = e4000_pll_lut[i].div;
- dev_dbg(&priv->i2c->dev, "%s: f_vco=%u pll div=%d sigma_delta=%04x\n",
+ dev_dbg(&priv->client->dev,
+ "%s: f_vco=%u pll div=%d sigma_delta=%04x\n",
__func__, f_vco, buf[0], sigma_delta);
ret = e4000_wr_regs(priv, 0x09, buf, 5);
@@ -369,7 +370,7 @@ err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+ dev_dbg(&priv->client->dev, "%s: failed=%d\n", __func__, ret);
return ret;
}
@@ -377,24 +378,13 @@ static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct e4000_priv *priv = fe->tuner_priv;
- dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+ dev_dbg(&priv->client->dev, "%s:\n", __func__);
*frequency = 0; /* Zero-IF */
return 0;
}
-static int e4000_release(struct dvb_frontend *fe)
-{
- struct e4000_priv *priv = fe->tuner_priv;
-
- dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
-
- kfree(fe->tuner_priv);
-
- return 0;
-}
-
static const struct dvb_tuner_ops e4000_tuner_ops = {
.info = {
.name = "Elonics E4000",
@@ -402,8 +392,6 @@ static const struct dvb_tuner_ops e4000_tuner_ops = {
.frequency_max = 862000000,
},
- .release = e4000_release,
-
.init = e4000_init,
.sleep = e4000_sleep,
.set_params = e4000_set_params,
@@ -411,9 +399,11 @@ static const struct dvb_tuner_ops e4000_tuner_ops = {
.get_if_frequency = e4000_get_if_frequency,
};
-struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
- struct i2c_adapter *i2c, const struct e4000_config *cfg)
+static int e4000_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
+ struct e4000_config *cfg = client->dev.platform_data;
+ struct dvb_frontend *fe = cfg->fe;
struct e4000_priv *priv;
int ret;
u8 chip_id;
@@ -424,29 +414,33 @@ struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
priv = kzalloc(sizeof(struct e4000_priv), GFP_KERNEL);
if (!priv) {
ret = -ENOMEM;
- dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+ dev_err(&client->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
goto err;
}
- priv->cfg = cfg;
- priv->i2c = i2c;
+ priv->clock = cfg->clock;
+ priv->client = client;
+ priv->fe = cfg->fe;
/* check if the tuner is there */
ret = e4000_rd_reg(priv, 0x02, &chip_id);
if (ret < 0)
goto err;
- dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);
+ dev_dbg(&priv->client->dev,
+ "%s: chip_id=%02x\n", __func__, chip_id);
- if (chip_id != 0x40)
+ if (chip_id != 0x40) {
+ ret = -ENODEV;
goto err;
+ }
/* put sleep as chip seems to be in normal mode by default */
ret = e4000_wr_reg(priv, 0x00, 0x00);
if (ret < 0)
goto err;
- dev_info(&priv->i2c->dev,
+ dev_info(&priv->client->dev,
"%s: Elonics E4000 successfully identified\n",
KBUILD_MODNAME);
@@ -457,16 +451,49 @@ struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- return fe;
+ i2c_set_clientdata(client, priv);
+
+ return 0;
err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
- dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+ dev_dbg(&client->dev, "%s: failed=%d\n", __func__, ret);
kfree(priv);
- return NULL;
+ return ret;
}
-EXPORT_SYMBOL(e4000_attach);
+
+static int e4000_remove(struct i2c_client *client)
+{
+ struct e4000_priv *priv = i2c_get_clientdata(client);
+ struct dvb_frontend *fe = priv->fe;
+
+ dev_dbg(&client->dev, "%s:\n", __func__);
+
+ memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+ fe->tuner_priv = NULL;
+ kfree(priv);
+
+ return 0;
+}
+
+static const struct i2c_device_id e4000_id[] = {
+ {"e4000", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, e4000_id);
+
+static struct i2c_driver e4000_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "e4000",
+ },
+ .probe = e4000_probe,
+ .remove = e4000_remove,
+ .id_table = e4000_id,
+};
+
+module_i2c_driver(e4000_driver);
MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@xxxxxx>");
diff --git a/drivers/media/tuners/e4000.h b/drivers/media/tuners/e4000.h
index 25ee7c0..e74b8b2 100644
--- a/drivers/media/tuners/e4000.h
+++ b/drivers/media/tuners/e4000.h
@@ -24,12 +24,15 @@
#include <linux/kconfig.h>
#include "dvb_frontend.h"
+/*
+ * I2C address
+ * 0x64, 0x65, 0x66, 0x67
+ */
struct e4000_config {
/*
- * I2C address
- * 0x64, 0x65, 0x66, 0x67
+ * frontend
*/
- u8 i2c_addr;
+ struct dvb_frontend *fe;
/*
* clock
@@ -37,16 +40,4 @@ struct e4000_config {
u32 clock;
};
-#if IS_ENABLED(CONFIG_MEDIA_TUNER_E4000)
-extern struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
- struct i2c_adapter *i2c, const struct e4000_config *cfg);
-#else
-static inline struct dvb_frontend *e4000_attach(struct dvb_frontend *fe,
- struct i2c_adapter *i2c, const struct e4000_config *cfg)
-{
- dev_warn(&i2c->dev, "%s: driver disabled by Kconfig\n", __func__);
- return NULL;
-}
-#endif
-
#endif
diff --git a/drivers/media/tuners/e4000_priv.h b/drivers/media/tuners/e4000_priv.h
index a385505..8f45a30 100644
--- a/drivers/media/tuners/e4000_priv.h
+++ b/drivers/media/tuners/e4000_priv.h
@@ -24,8 +24,9 @@
#include "e4000.h"
struct e4000_priv {
- const struct e4000_config *cfg;
- struct i2c_adapter *i2c;
+ struct i2c_client *client;
+ u32 clock;
+ struct dvb_frontend *fe;
};
struct e4000_pll {
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index e9294dc..ae07740 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -852,11 +852,6 @@ err:
return ret;
}
-static const struct e4000_config rtl2832u_e4000_config = {
- .i2c_addr = 0x64,
- .clock = 28800000,
-};
-
static const struct fc2580_config rtl2832u_fc2580_config = {
.i2c_addr = 0x56,
.clock = 16384000,
@@ -890,10 +885,14 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
int ret;
struct dvb_usb_device *d = adap_to_d(adap);
struct rtl28xxu_priv *priv = d_to_priv(d);
- struct dvb_frontend *fe;
+ struct dvb_frontend *fe = NULL;
+ struct i2c_board_info info;
+ struct i2c_client *client;
dev_dbg(&d->udev->dev, "%s:\n", __func__);
+ memset(&info, 0, sizeof(struct i2c_board_info));
+
switch (priv->tuner) {
case TUNER_RTL2832_FC0012:
fe = dvb_attach(fc0012_attach, adap->fe[0],
@@ -913,9 +912,28 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
adap->fe[0]->ops.read_signal_strength =
adap->fe[0]->ops.tuner_ops.get_rf_strength;
return 0;
- case TUNER_RTL2832_E4000:
- fe = dvb_attach(e4000_attach, adap->fe[0], &d->i2c_adap,
- &rtl2832u_e4000_config);
+ case TUNER_RTL2832_E4000: {
+ struct e4000_config e4000_config = {
+ .fe = adap->fe[0],
+ .clock = 28800000,
+ };
+
+ strlcpy(info.type, "e4000", I2C_NAME_SIZE);
+ info.addr = 0x64;
+ info.platform_data = &e4000_config;
+
+ request_module(info.type);
+ client = i2c_new_device(&d->i2c_adap, &info);
+ if (client == NULL || client->dev.driver == NULL)
+ break;
+
+ if (!try_module_get(client->dev.driver->owner)) {
+ i2c_unregister_device(client);
+ break;
+ }
+
+ priv->client = client;
+ }
break;
case TUNER_RTL2832_FC2580:
fe = dvb_attach(fc2580_attach, adap->fe[0], &d->i2c_adap,
@@ -964,12 +982,11 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
adap->fe[0]->ops.tuner_ops.get_rf_strength;
break;
default:
- fe = NULL;
dev_err(&d->udev->dev, "%s: unknown tuner=%d\n", KBUILD_MODNAME,
priv->tuner);
}
- if (fe == NULL) {
+ if (fe == NULL && priv->client == NULL) {
ret = -ENODEV;
goto err;
}
@@ -1014,6 +1031,22 @@ err:
return ret;
}
+static void rtl28xxu_exit(struct dvb_usb_device *d)
+{
+ struct rtl28xxu_priv *priv = d->priv;
+ struct i2c_client *client = priv->client;
+
+ dev_dbg(&d->udev->dev, "%s:\n", __func__);
+
+ /* remove I2C tuner */
+ if (client) {
+ module_put(client->dev.driver->owner);
+ i2c_unregister_device(client);
+ }
+
+ return;
+}
+
static int rtl2831u_power_ctrl(struct dvb_usb_device *d, int onoff)
{
int ret;
@@ -1376,6 +1409,7 @@ static const struct dvb_usb_device_properties rtl2832u_props = {
.frontend_attach = rtl2832u_frontend_attach,
.tuner_attach = rtl2832u_tuner_attach,
.init = rtl28xxu_init,
+ .exit = rtl28xxu_exit,
.get_rc_config = rtl2832u_get_rc_config,
.num_adapters = 1,
diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
index 2142bcb..367aca1 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.h
@@ -56,6 +56,7 @@ struct rtl28xxu_priv {
char *tuner_name;
u8 page; /* integrated demod active register page */
bool rc_active;
+ struct i2c_client *client;
};
enum rtl28xxu_chip_id {
--
1.8.5.3
--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
