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Message-Id: <20190529180206.2390-1-tobias.johannes.klausmann@mni.thm.de>
Date: Wed, 29 May 2019 20:02:06 +0200
From: Tobias Klausmann <tobias.johannes.klausmann@....thm.de>
To: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
mchehab@...nel.org, sean@...s.org
Cc: Tobias Klausmann <tobias.johannes.klausmann@....thm.de>
Subject: [PATCH] drivers/media/dvb-frontends: Implement probe/remove for stv090x
Move common code into a new function.
This provides the needed functionality to use dvb_module_probe() instead
of dvb_attach()!
Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@....thm.de>
---
drivers/media/dvb-frontends/stv090x.c | 198 +++++++++++++++------
drivers/media/dvb-frontends/stv090x.h | 3 +
drivers/media/dvb-frontends/stv090x_priv.h | 2 +-
3 files changed, 150 insertions(+), 53 deletions(-)
diff --git a/drivers/media/dvb-frontends/stv090x.c b/drivers/media/dvb-frontends/stv090x.c
index d1261571dbe4..b7fdb48f4f14 100644
--- a/drivers/media/dvb-frontends/stv090x.c
+++ b/drivers/media/dvb-frontends/stv090x.c
@@ -4889,6 +4889,67 @@ static int stv090x_set_gpio(struct dvb_frontend *fe, u8 gpio, u8 dir,
return stv090x_write_reg(state, STV090x_GPIOxCFG(gpio), reg);
}
+int stv090x_setup_compound(struct stv090x_state *state)
+{
+ struct stv090x_dev *temp_int;
+
+ temp_int = find_dev(state->i2c,
+ state->config->address);
+
+ if (temp_int && state->demod_mode == STV090x_DUAL) {
+ state->internal = temp_int->internal;
+ state->internal->num_used++;
+ dprintk(FE_INFO, 1, "Found Internal Structure!");
+ } else {
+ state->internal = kmalloc(sizeof(*state->internal), GFP_KERNEL);
+ if (!state->internal)
+ goto error;
+ temp_int = append_internal(state->internal);
+ if (!temp_int) {
+ kfree(state->internal);
+ goto error;
+ }
+ state->internal->num_used = 1;
+ state->internal->mclk = 0;
+ state->internal->dev_ver = 0;
+ state->internal->i2c_adap = state->i2c;
+ state->internal->i2c_addr = state->config->address;
+ dprintk(FE_INFO, 1, "Create New Internal Structure!");
+
+ mutex_init(&state->internal->demod_lock);
+ mutex_init(&state->internal->tuner_lock);
+
+ if (stv090x_setup(&state->frontend) < 0) {
+ dprintk(FE_ERROR, 1, "Error setting up device");
+ goto err_remove;
+ }
+ }
+
+ if (state->internal->dev_ver >= 0x30)
+ state->frontend.ops.info.caps |= FE_CAN_MULTISTREAM;
+
+ /* workaround for stuck DiSEqC output */
+ if (state->config->diseqc_envelope_mode)
+ stv090x_send_diseqc_burst(&state->frontend, SEC_MINI_A);
+
+ state->config->set_gpio = stv090x_set_gpio;
+
+ dprintk(FE_ERROR, 1, "Probing %s demodulator(%d) Cut=0x%02x",
+ state->device == STV0900 ? "STV0900" : "STV0903",
+ state->config->demod,
+ state->internal->dev_ver);
+
+ return 0;
+
+error:
+ kfree(state);
+ return -ENOMEM;
+err_remove:
+ remove_dev(state->internal);
+ kfree(state->internal);
+ return -ENODEV;
+}
+
static const struct dvb_frontend_ops stv090x_ops = {
.delsys = { SYS_DVBS, SYS_DVBS2, SYS_DSS },
.info = {
@@ -4921,85 +4982,118 @@ static const struct dvb_frontend_ops stv090x_ops = {
.read_snr = stv090x_read_cnr,
};
+static struct dvb_frontend *stv090x_get_dvb_frontend(struct i2c_client *client)
+{
+ struct stv090x_state *state = i2c_get_clientdata(client);
-struct dvb_frontend *stv090x_attach(struct stv090x_config *config,
- struct i2c_adapter *i2c,
- enum stv090x_demodulator demod)
+ dev_dbg(&client->dev, "\n");
+
+ return &state->frontend;
+}
+
+static int stv090x_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
+ int ret = 0;
+ struct stv090x_config *config = client->dev.platform_data;
+
struct stv090x_state *state = NULL;
- struct stv090x_dev *temp_int;
- state = kzalloc(sizeof (struct stv090x_state), GFP_KERNEL);
- if (state == NULL)
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state) {
goto error;
+ ret = -ENOMEM;
+ }
state->verbose = &verbose;
state->config = config;
- state->i2c = i2c;
+ state->i2c = client->adapter;
state->frontend.ops = stv090x_ops;
state->frontend.demodulator_priv = state;
- state->demod = demod;
- state->demod_mode = config->demod_mode; /* Single or Dual mode */
+ state->demod = config->demod;
+ /* Single or Dual mode */
+ state->demod_mode = config->demod_mode;
state->device = config->device;
- state->rolloff = STV090x_RO_35; /* default */
+ /* default */
+ state->rolloff = STV090x_RO_35;
- temp_int = find_dev(state->i2c,
- state->config->address);
+ ret = stv090x_setup_compound(state);
+ if (ret)
+ goto error;
- if ((temp_int != NULL) && (state->demod_mode == STV090x_DUAL)) {
- state->internal = temp_int->internal;
- state->internal->num_used++;
- dprintk(FE_INFO, 1, "Found Internal Structure!");
- } else {
- state->internal = kmalloc(sizeof(struct stv090x_internal),
- GFP_KERNEL);
- if (!state->internal)
- goto error;
- temp_int = append_internal(state->internal);
- if (!temp_int) {
- kfree(state->internal);
- goto error;
- }
- state->internal->num_used = 1;
- state->internal->mclk = 0;
- state->internal->dev_ver = 0;
- state->internal->i2c_adap = state->i2c;
- state->internal->i2c_addr = state->config->address;
- dprintk(FE_INFO, 1, "Create New Internal Structure!");
+ i2c_set_clientdata(client, state);
- mutex_init(&state->internal->demod_lock);
- mutex_init(&state->internal->tuner_lock);
+ /* setup callbacks */
+ config->get_dvb_frontend = stv090x_get_dvb_frontend;
- if (stv090x_setup(&state->frontend) < 0) {
- dprintk(FE_ERROR, 1, "Error setting up device");
- goto err_remove;
- }
- }
+ return 0;
- if (state->internal->dev_ver >= 0x30)
- state->frontend.ops.info.caps |= FE_CAN_MULTISTREAM;
+error:
+ kfree(state);
+ return ret;
+}
- /* workaround for stuck DiSEqC output */
- if (config->diseqc_envelope_mode)
- stv090x_send_diseqc_burst(&state->frontend, SEC_MINI_A);
+static int stv090x_remove(struct i2c_client *client)
+{
+ struct stv090x_state *state = i2c_get_clientdata(client);
+
+ stv090x_release(&state->frontend);
+ return 0;
+}
- config->set_gpio = stv090x_set_gpio;
+struct dvb_frontend *stv090x_attach(struct stv090x_config *config,
+ struct i2c_adapter *i2c,
+ enum stv090x_demodulator demod)
+{
+ int ret = 0;
+ struct stv090x_state *state = NULL;
- dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x",
- state->device == STV0900 ? "STV0900" : "STV0903",
- demod,
- state->internal->dev_ver);
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ goto error;
+
+ state->verbose = &verbose;
+ state->config = config;
+ state->i2c = i2c;
+ state->frontend.ops = stv090x_ops;
+ state->frontend.demodulator_priv = state;
+ state->demod = demod;
+ /* Single or Dual mode */
+ state->demod_mode = config->demod_mode;
+ state->device = config->device;
+ /* default */
+ state->rolloff = STV090x_RO_35;
+
+ ret = stv090x_setup_compound(state);
+ if (ret)
+ goto error;
return &state->frontend;
-err_remove:
- remove_dev(state->internal);
- kfree(state->internal);
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(stv090x_attach);
+
+static const struct i2c_device_id stv090x_id_table[] = {
+ {"stv090x", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, stv090x_id_table);
+
+static struct i2c_driver stv090x_driver = {
+ .driver = {
+ .name = "stv090x",
+ .suppress_bind_attrs = true,
+ },
+ .probe = stv090x_probe,
+ .remove = stv090x_remove,
+ .id_table = stv090x_id_table,
+};
+
+module_i2c_driver(stv090x_driver);
+
MODULE_PARM_DESC(verbose, "Set Verbosity level");
MODULE_AUTHOR("Manu Abraham");
MODULE_DESCRIPTION("STV090x Multi-Std Broadcast frontend");
diff --git a/drivers/media/dvb-frontends/stv090x.h b/drivers/media/dvb-frontends/stv090x.h
index 13f251a08abd..89f45d9fa427 100644
--- a/drivers/media/dvb-frontends/stv090x.h
+++ b/drivers/media/dvb-frontends/stv090x.h
@@ -57,6 +57,7 @@ struct stv090x_config {
enum stv090x_device device;
enum stv090x_mode demod_mode;
enum stv090x_clkmode clk_mode;
+ enum stv090x_demodulator demod;
u32 xtal; /* default: 8000000 */
u8 address; /* default: 0x68 */
@@ -93,6 +94,8 @@ struct stv090x_config {
/* dir = 0 -> output, dir = 1 -> input/open-drain */
int (*set_gpio)(struct dvb_frontend *fe, u8 gpio, u8 dir, u8 value,
u8 xor_value);
+
+ struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *i2c);
};
#if IS_REACHABLE(CONFIG_DVB_STV090x)
diff --git a/drivers/media/dvb-frontends/stv090x_priv.h b/drivers/media/dvb-frontends/stv090x_priv.h
index b22c58968c93..f8ece898c153 100644
--- a/drivers/media/dvb-frontends/stv090x_priv.h
+++ b/drivers/media/dvb-frontends/stv090x_priv.h
@@ -237,7 +237,7 @@ struct stv090x_state {
struct stv090x_internal *internal;
struct i2c_adapter *i2c;
- const struct stv090x_config *config;
+ struct stv090x_config *config;
struct dvb_frontend frontend;
u32 *verbose; /* Cached module verbosity */
--
2.21.0
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