diff options
author | Matthias Schwarzott <zzam@gentoo.org> | 2014-10-02 05:21:03 (GMT) |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2014-10-30 19:38:43 (GMT) |
commit | 15c212dd0f7af8650808ada802c9317b4b0ec5a7 (patch) | |
tree | 4565a1250b62fdd3bd93c100fc546793712c1e4f /drivers/media | |
parent | b9ce9dfd18eb30a2c57de6f410a749c58d47743f (diff) | |
download | linux-15c212dd0f7af8650808ada802c9317b4b0ec5a7.tar.xz |
[media] cx231xx: register i2c mux adapters for bus 1
I2C bus 1 has internally a switch. Use it as I2C_1_MUX_1 and
I2C_1_MUX_3, letting the I2C core handling the switch.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/usb/cx231xx/Kconfig | 1 | ||||
-rw-r--r-- | drivers/media/usb/cx231xx/cx231xx-core.c | 5 | ||||
-rw-r--r-- | drivers/media/usb/cx231xx/cx231xx-i2c.c | 44 | ||||
-rw-r--r-- | drivers/media/usb/cx231xx/cx231xx.h | 4 |
4 files changed, 53 insertions, 1 deletions
diff --git a/drivers/media/usb/cx231xx/Kconfig b/drivers/media/usb/cx231xx/Kconfig index 569aa29..173c0e2 100644 --- a/drivers/media/usb/cx231xx/Kconfig +++ b/drivers/media/usb/cx231xx/Kconfig @@ -7,6 +7,7 @@ config VIDEO_CX231XX select VIDEOBUF_VMALLOC select VIDEO_CX25840 select VIDEO_CX2341X + select I2C_MUX ---help--- This is a video4linux driver for Conexant 231xx USB based TV cards. diff --git a/drivers/media/usb/cx231xx/cx231xx-core.c b/drivers/media/usb/cx231xx/cx231xx-core.c index 180103e..c8a6d20 100644 --- a/drivers/media/usb/cx231xx/cx231xx-core.c +++ b/drivers/media/usb/cx231xx/cx231xx-core.c @@ -1300,6 +1300,9 @@ int cx231xx_dev_init(struct cx231xx *dev) cx231xx_i2c_register(&dev->i2c_bus[1]); cx231xx_i2c_register(&dev->i2c_bus[2]); + cx231xx_i2c_mux_register(dev, 0); + cx231xx_i2c_mux_register(dev, 1); + /* init hardware */ /* Note : with out calling set power mode function, afe can not be set up correctly */ @@ -1414,6 +1417,8 @@ EXPORT_SYMBOL_GPL(cx231xx_dev_init); void cx231xx_dev_uninit(struct cx231xx *dev) { /* Un Initialize I2C bus */ + cx231xx_i2c_mux_unregister(dev, 1); + cx231xx_i2c_mux_unregister(dev, 0); cx231xx_i2c_unregister(&dev->i2c_bus[2]); cx231xx_i2c_unregister(&dev->i2c_bus[1]); cx231xx_i2c_unregister(&dev->i2c_bus[0]); diff --git a/drivers/media/usb/cx231xx/cx231xx-i2c.c b/drivers/media/usb/cx231xx/cx231xx-i2c.c index 9ade3ac..3e9dfd8 100644 --- a/drivers/media/usb/cx231xx/cx231xx-i2c.c +++ b/drivers/media/usb/cx231xx/cx231xx-i2c.c @@ -24,6 +24,7 @@ #include <linux/kernel.h> #include <linux/usb.h> #include <linux/i2c.h> +#include <linux/i2c-mux.h> #include <media/v4l2-common.h> #include <media/tuner.h> @@ -547,6 +548,46 @@ int cx231xx_i2c_unregister(struct cx231xx_i2c *bus) return 0; } +/* + * cx231xx_i2c_mux_select() + * switch i2c master number 1 between port1 and port3 + */ +static int cx231xx_i2c_mux_select(struct i2c_adapter *adap, + void *mux_priv, u32 chan_id) +{ + struct cx231xx *dev = mux_priv; + + return cx231xx_enable_i2c_port_3(dev, chan_id); +} + +int cx231xx_i2c_mux_register(struct cx231xx *dev, int mux_no) +{ + struct i2c_adapter *i2c_parent = &dev->i2c_bus[1].i2c_adap; + /* what is the correct mux_dev? */ + struct device *mux_dev = &dev->udev->dev; + + dev->i2c_mux_adap[mux_no] = i2c_add_mux_adapter(i2c_parent, + mux_dev, + dev /* mux_priv */, + 0, + mux_no /* chan_id */, + 0 /* class */, + &cx231xx_i2c_mux_select, + NULL); + + if (!dev->i2c_mux_adap[mux_no]) + cx231xx_warn("%s: i2c mux %d register FAILED\n", + dev->name, mux_no); + + return 0; +} + +void cx231xx_i2c_mux_unregister(struct cx231xx *dev, int mux_no) +{ + i2c_del_mux_adapter(dev->i2c_mux_adap[mux_no]); + dev->i2c_mux_adap[mux_no] = NULL; +} + struct i2c_adapter *cx231xx_get_i2c_adap(struct cx231xx *dev, int i2c_port) { switch (i2c_port) { @@ -557,8 +598,9 @@ struct i2c_adapter *cx231xx_get_i2c_adap(struct cx231xx *dev, int i2c_port) case I2C_2: return &dev->i2c_bus[2].i2c_adap; case I2C_1_MUX_1: + return dev->i2c_mux_adap[0]; case I2C_1_MUX_3: - return &dev->i2c_bus[1].i2c_adap; + return dev->i2c_mux_adap[1]; default: return NULL; } diff --git a/drivers/media/usb/cx231xx/cx231xx.h b/drivers/media/usb/cx231xx/cx231xx.h index 8a3c97b..c90aa44 100644 --- a/drivers/media/usb/cx231xx/cx231xx.h +++ b/drivers/media/usb/cx231xx/cx231xx.h @@ -628,6 +628,8 @@ struct cx231xx { /* I2C adapters: Master 1 & 2 (External) & Master 3 (Internal only) */ struct cx231xx_i2c i2c_bus[3]; + struct i2c_adapter *i2c_mux_adap[2]; + unsigned int xc_fw_load_done:1; unsigned int port_3_switch_enabled:1; /* locks */ @@ -755,6 +757,8 @@ int cx231xx_reset_analog_tuner(struct cx231xx *dev); void cx231xx_do_i2c_scan(struct cx231xx *dev, int i2c_port); int cx231xx_i2c_register(struct cx231xx_i2c *bus); int cx231xx_i2c_unregister(struct cx231xx_i2c *bus); +int cx231xx_i2c_mux_register(struct cx231xx *dev, int mux_no); +void cx231xx_i2c_mux_unregister(struct cx231xx *dev, int mux_no); struct i2c_adapter *cx231xx_get_i2c_adap(struct cx231xx *dev, int i2c_port); /* Internal block control functions */ |