I am on holiday trip now. But generally speaking I would like to separate all drivers from the interfaces. That means for example I2C tuner driver is just a I2C driver and nothing more - no relations to DVB nor V4L API. That is something I said many times earlier too, but for my taste drivers should be agnostics to APIs.
Antti
On 1 Jan 2015 15:51, Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> wrote:
>
> Instead of using I2C raw API, use the standard I2C binding API,
> with the DVB core support for it.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
>
> diff --git a/drivers/media/dvb-frontends/mb86a20s.c b/drivers/media/dvb-frontends/mb86a20s.c
> index 8f54c39ca63f..8dd608be1edd 100644
> --- a/drivers/media/dvb-frontends/mb86a20s.c
> +++ b/drivers/media/dvb-frontends/mb86a20s.c
> @@ -18,6 +18,7 @@
> #include <asm/div64.h>
>
> #include "dvb_frontend.h"
> +#include "dvb_i2c.h"
> #include "mb86a20s.h"
>
> #define NUM_LAYERS 3
> @@ -35,12 +36,10 @@ static u8 mb86a20s_subchannel[] = {
> };
>
> struct mb86a20s_state {
> - struct i2c_adapter *i2c;
> + struct i2c_client *i2c;
> const struct mb86a20s_config *config;
> u32 last_frequency;
>
> - struct dvb_frontend frontend;
> -
> u32 if_freq;
> enum mb86a20s_bandwidth bw;
> bool inversion;
> @@ -234,7 +233,7 @@ static int mb86a20s_i2c_writereg(struct mb86a20s_state *state,
> };
> int rc;
>
> - rc = i2c_transfer(state->i2c, &msg, 1);
> + rc = i2c_transfer(state->i2c->adapter, &msg, 1);
> if (rc != 1) {
> dev_err(&state->i2c->dev,
> "%s: writereg error (rc == %i, reg == 0x%02x, data == 0x%02x)\n",
> @@ -269,7 +268,7 @@ static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
> { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 }
> };
>
> - rc = i2c_transfer(state->i2c, msg, 2);
> + rc = i2c_transfer(state->i2c->adapter, msg, 2);
>
> if (rc != 2) {
> dev_err(&state->i2c->dev, "%s: reg=0x%x (error=%d)\n",
> @@ -281,11 +280,11 @@ static int mb86a20s_i2c_readreg(struct mb86a20s_state *state,
> }
>
> #define mb86a20s_readreg(state, reg) \
> - mb86a20s_i2c_readreg(state, state->config->demod_address, reg)
> + mb86a20s_i2c_readreg(state, state->i2c->addr, reg)
> #define mb86a20s_writereg(state, reg, val) \
> - mb86a20s_i2c_writereg(state, state->config->demod_address, reg, val)
> + mb86a20s_i2c_writereg(state, state->i2c->addr, reg, val)
> #define mb86a20s_writeregdata(state, regdata) \
> - mb86a20s_i2c_writeregdata(state, state->config->demod_address, \
> + mb86a20s_i2c_writeregdata(state, state->i2c->addr, \
> regdata, ARRAY_SIZE(regdata))
>
> /*
> @@ -2058,41 +2057,34 @@ static int mb86a20s_tune(struct dvb_frontend *fe,
> return rc;
> }
>
> -static void mb86a20s_release(struct dvb_frontend *fe)
> +static int mb86a20s_remove(struct i2c_client *i2c)
> {
> - struct mb86a20s_state *state = fe->demodulator_priv;
> + dev_dbg(&i2c->dev, "%s called.\n", __func__);
>
> - dev_dbg(&state->i2c->dev, "%s called.\n", __func__);
> -
> - kfree(state);
> + return 0;
> }
>
> static struct dvb_frontend_ops mb86a20s_ops;
>
> -struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
> - struct i2c_adapter *i2c)
> +static int mb86a20s_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> {
> + struct dvb_frontend *fe;
> struct mb86a20s_state *state;
> u8 rev;
>
> dev_dbg(&i2c->dev, "%s called.\n", __func__);
>
> - /* allocate memory for the internal state */
> - state = kzalloc(sizeof(struct mb86a20s_state), GFP_KERNEL);
> - if (state == NULL) {
> - dev_err(&i2c->dev,
> - "%s: unable to allocate memory for state\n", __func__);
> - goto error;
> - }
> + fe = i2c_get_clientdata(i2c);
> + state = fe->demodulator_priv;
>
> /* setup the state */
> - state->config = config;
> + memcpy(&state->config, i2c->dev.platform_data, sizeof(state->config));
> state->i2c = i2c;
>
> /* create dvb_frontend */
> - memcpy(&state->frontend.ops, &mb86a20s_ops,
> + memcpy(&fe->ops, &mb86a20s_ops,
> sizeof(struct dvb_frontend_ops));
> - state->frontend.demodulator_priv = state;
>
> /* Check if it is a mb86a20s frontend */
> rev = mb86a20s_readreg(state, 0);
> @@ -2104,16 +2096,11 @@ struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
> dev_dbg(&i2c->dev,
> "Frontend revision %d is unknown - aborting.\n",
> rev);
> - goto error;
> + return -ENODEV;
> }
>
> - return &state->frontend;
> -
> -error:
> - kfree(state);
> - return NULL;
> + return 0;
> }
> -EXPORT_SYMBOL(mb86a20s_attach);
>
> static struct dvb_frontend_ops mb86a20s_ops = {
> .delsys = { SYS_ISDBT },
> @@ -2132,8 +2119,6 @@ static struct dvb_frontend_ops mb86a20s_ops = {
> .frequency_stepsize = 62500,
> },
>
> - .release = mb86a20s_release,
> -
> .init = mb86a20s_initfe,
> .set_frontend = mb86a20s_set_frontend,
> .get_frontend = mb86a20s_get_frontend_dummy,
> @@ -2142,6 +2127,21 @@ static struct dvb_frontend_ops mb86a20s_ops = {
> .tune = mb86a20s_tune,
> };
>
> +static const struct i2c_device_id mb86a20s_id[] = {
> + { "mb86a20s", 0 },
> + {}
> +};
> +
> +static const struct dvb_i2c_module_param mb86a20s_param = {
> + .ops.fe_ops = NULL,
> + .priv_probe = mb86a20s_probe,
> + .priv_remove = mb86a20s_remove,
> + .priv_size = sizeof(struct mb86a20s_state),
> + .is_tuner = false,
> +};
> +
> +DEFINE_DVB_I2C_MODULE(mb86a20s, mb86a20s_id, mb86a20s_param);
> +
> MODULE_DESCRIPTION("DVB Frontend module for Fujitsu mb86A20s hardware");
> MODULE_AUTHOR("Mauro Carvalho Chehab");
> MODULE_LICENSE("GPL");
> diff --git a/drivers/media/dvb-frontends/mb86a20s.h b/drivers/media/dvb-frontends/mb86a20s.h
> index cbeb941fba7c..18743c32209c 100644
> --- a/drivers/media/dvb-frontends/mb86a20s.h
> +++ b/drivers/media/dvb-frontends/mb86a20s.h
> @@ -34,23 +34,4 @@ struct mb86a20s_config {
> bool is_serial;
> };
>
> -#if IS_ENABLED(CONFIG_DVB_MB86A20S)
> -extern struct dvb_frontend *mb86a20s_attach(const struct mb86a20s_config *config,
> - struct i2c_adapter *i2c);
> -extern struct i2c_adapter *mb86a20s_get_tuner_i2c_adapter(struct dvb_frontend *);
> -#else
> -static inline struct dvb_frontend *mb86a20s_attach(
> - const struct mb86a20s_config *config, struct i2c_adapter *i2c)
> -{
> - printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
> - return NULL;
> -}
> -static struct i2c_adapter *
> - mb86a20s_get_tuner_i2c_adapter(struct dvb_frontend *fe)
> -{
> - printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
> - return NULL;
> -}
> -#endif
> -
> #endif /* MB86A20S */
> diff --git a/drivers/media/pci/cx23885/cx23885-dvb.c b/drivers/media/pci/cx23885/cx23885-dvb.c
> index c47d18270cfc..fc23b7ad194f 100644
> --- a/drivers/media/pci/cx23885/cx23885-dvb.c
> +++ b/drivers/media/pci/cx23885/cx23885-dvb.c
> @@ -26,6 +26,7 @@
> #include "cx23885.h"
> #include <media/v4l2-common.h>
>
> +#include "dvb_i2c.h"
> #include "dvb_ca_en50221.h"
> #include "s5h1409.h"
> #include "s5h1411.h"
> @@ -542,7 +543,10 @@ static struct xc5000_config mygica_x8506_xc5000_config = {
> };
>
> static struct mb86a20s_config mygica_x8507_mb86a20s_config = {
> - .demod_address = 0x10,
> +};
> +
> +static const struct i2c_board_info mb86a20s_board_info = {
> + I2C_BOARD_INFO("mb86a20s", 0x10)
> };
>
> static struct xc5000_config mygica_x8507_xc5000_config = {
> @@ -1503,9 +1507,10 @@ static int dvb_register(struct cx23885_tsport *port)
> case CX23885_BOARD_MYGICA_X8507:
> i2c_bus = &dev->i2c_bus[0];
> i2c_bus2 = &dev->i2c_bus[1];
> - fe0->dvb.frontend = dvb_attach(mb86a20s_attach,
> - &mygica_x8507_mb86a20s_config,
> - &i2c_bus->i2c_adap);
> + fe0->dvb.frontend = dvb_i2c_attach_fe(&i2c_bus->i2c_adap,
> + &mb86a20s_board_info,
> + &mygica_x8507_mb86a20s_config,
> + NULL);
> if (fe0->dvb.frontend == NULL)
> break;
>
> diff --git a/drivers/media/pci/saa7134/saa7134-dvb.c b/drivers/media/pci/saa7134/saa7134-dvb.c
> index 73ffbabf831c..74b5ce0de488 100644
> --- a/drivers/media/pci/saa7134/saa7134-dvb.c
> +++ b/drivers/media/pci/saa7134/saa7134-dvb.c
> @@ -34,6 +34,7 @@
> #include "dvb-pll.h"
> #include <dvb_frontend.h>
>
> +#include "dvb_i2c.h"
> #include "mt352.h"
> #include "mt352_priv.h" /* FIXME */
> #include "tda1004x.h"
> @@ -245,7 +246,10 @@ static struct tda18271_config kworld_tda18271_config = {
> };
>
> static const struct mb86a20s_config kworld_mb86a20s_config = {
> - .demod_address = 0x10,
> +};
> +
> +static const struct i2c_board_info mb86a20s_board_info = {
> + I2C_BOARD_INFO("mb86a20s", 0x10)
> };
>
> static int kworld_sbtvd_gate_ctrl(struct dvb_frontend* fe, int enable)
> @@ -1807,9 +1811,10 @@ static int dvb_init(struct saa7134_dev *dev)
> /* Switch to digital mode */
> saa7134_tuner_callback(dev, 0,
> TDA18271_CALLBACK_CMD_AGC_ENABLE, 1);
> - fe0->dvb.frontend = dvb_attach(mb86a20s_attach,
> - &kworld_mb86a20s_config,
> - &dev->i2c_adap);
> + fe0->dvb.frontend = dvb_i2c_attach_fe(&dev->i2c_adap,
> + &mb86a20s_board_info,
> + &kworld_mb86a20s_config,
> + NULL);
> if (fe0->dvb.frontend != NULL) {
> dvb_attach(tda829x_attach, fe0->dvb.frontend,
> &dev->i2c_adap, 0x4b,
> diff --git a/drivers/media/usb/cx231xx/cx231xx-dvb.c b/drivers/media/usb/cx231xx/cx231xx-dvb.c
> index dd600b994e69..27803a8cf5a4 100644
> --- a/drivers/media/usb/cx231xx/cx231xx-dvb.c
> +++ b/drivers/media/usb/cx231xx/cx231xx-dvb.c
> @@ -26,6 +26,7 @@
> #include <media/v4l2-common.h>
> #include <media/videobuf-vmalloc.h>
>
> +#include "dvb_i2c.h"
> #include "xc5000.h"
> #include "s5h1432.h"
> #include "tda18271.h"
> @@ -138,10 +139,13 @@ static struct tda18271_config hcw_tda18271_config = {
> };
>
> static const struct mb86a20s_config pv_mb86a20s_config = {
> - .demod_address = 0x10,
> .is_serial = true,
> };
>
> +static const struct i2c_board_info mb86a20s_board_info = {
> + I2C_BOARD_INFO("mb86a20s", 0x10)
> +};
> +
> static struct tda18271_config pv_tda18271_config = {
> .std_map = &mb86a20s_tda18271_config,
> .gate = TDA18271_GATE_DIGITAL,
> @@ -815,10 +819,10 @@ static int dvb_init(struct cx231xx *dev)
> "%s: looking for demod on i2c bus: %d\n",
> __func__, i2c_adapter_id(tuner_i2c));
>
> - dev->dvb->frontend = dvb_attach(mb86a20s_attach,
> - &pv_mb86a20s_config,
> - demod_i2c);
> -
> + dev->dvb->frontend = dvb_i2c_attach_fe(demod_i2c,
> + &mb86a20s_board_info,
> + &pv_mb86a20s_config,
> + NULL);
> if (dev->dvb->frontend == NULL) {
> dev_err(dev->dev,
> "Failed to attach mb86a20s demod\n");
> diff --git a/drivers/media/usb/em28xx/em28xx-dvb.c b/drivers/media/usb/em28xx/em28xx-dvb.c
> index aee70d483264..6fa4eeed9f50 100644
> --- a/drivers/media/usb/em28xx/em28xx-dvb.c
> +++ b/drivers/media/usb/em28xx/em28xx-dvb.c
> @@ -34,6 +34,7 @@
> #include "tuner-simple.h"
> #include <linux/gpio.h>
>
> +#include "dvb_i2c.h"
> #include "lgdt330x.h"
> #include "lgdt3305.h"
> #include "zl10353.h"
> @@ -833,10 +834,13 @@ static struct qt1010_config em28xx_qt1010_config = {
> };
>
> static const struct mb86a20s_config c3tech_duo_mb86a20s_config = {
> - .demod_address = 0x10,
> .is_serial = true,
> };
>
> +static const struct i2c_board_info mb86a20s_board_info = {
> + I2C_BOARD_INFO("mb86a20s", 0x10)
> +};
> +
> static struct tda18271_std_map mb86a20s_tda18271_config = {
> .dvbt_6 = { .if_freq = 4000, .agc_mode = 3, .std = 4,
> .if_lvl = 1, .rfagc_top = 0x37, },
> @@ -1323,9 +1327,10 @@ static int em28xx_dvb_init(struct em28xx *dev)
>
> break;
> case EM2884_BOARD_C3TECH_DIGITAL_DUO:
> - dvb->fe[0] = dvb_attach(mb86a20s_attach,
> - &c3tech_duo_mb86a20s_config,
> - &dev->i2c_adap[dev->def_i2c_bus]);
> + dvb->fe[0] = dvb_i2c_attach_fe(&dev->i2c_adap[dev->def_i2c_bus],
> + &mb86a20s_board_info,
> + &c3tech_duo_mb86a20s_config,
> + NULL);
> if (dvb->fe[0] != NULL)
> dvb_attach(tda18271_attach, dvb->fe[0], 0x60,
> &dev->i2c_adap[dev->def_i2c_bus],
> --
> 2.1.0
>
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