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Subject: [media] DiB0700: add function to change I2C-speed Author: Olivier Grenie <olivier.gre...@dibcom.fr> Date: Mon Jan 3 15:30:14 2011 -0300 This commit adds a function to the DiB0700 USB driver which allows drivers to change the I2C clock speed. Signed-off-by: Olivier Grenie <olivier.gre...@dibcom.fr> Signed-off-by: Patrick Boettcher <patrick.boettc...@dibcom.fr> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/dvb/dvb-usb/dib0700.h | 2 + drivers/media/dvb/dvb-usb/dib0700_core.c | 42 +++++++++++++++++++++++++++--- 2 files changed, 40 insertions(+), 4 deletions(-) --- http://git.linuxtv.org/media_tree.git?a=commitdiff;h=543924735ffb147c7c0f6393cc743e622e96e310 diff --git a/drivers/media/dvb/dvb-usb/dib0700.h b/drivers/media/dvb/dvb-usb/dib0700.h index 3537d65..b2a87f2 100644 --- a/drivers/media/dvb/dvb-usb/dib0700.h +++ b/drivers/media/dvb/dvb-usb/dib0700.h @@ -32,6 +32,7 @@ extern int dvb_usb_dib0700_debug; // 1 Byte: 4MSB(1 = enable streaming, 0 = disable streaming) 4LSB(Video Mode: 0 = MPEG2 188Bytes, 1 = Analog) // 2 Byte: MPEG2 mode: 4MSB(1 = Master Mode, 0 = Slave Mode) 4LSB(Channel 1 = bit0, Channel 2 = bit1) // 2 Byte: Analog mode: 4MSB(0 = 625 lines, 1 = 525 lines) 4LSB( " " ) +#define REQUEST_SET_I2C_PARAM 0x10 #define REQUEST_SET_RC 0x11 #define REQUEST_NEW_I2C_READ 0x12 #define REQUEST_NEW_I2C_WRITE 0x13 @@ -61,6 +62,7 @@ extern struct i2c_algorithm dib0700_i2c_algo; extern int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props, struct dvb_usb_device_description **desc, int *cold); extern int dib0700_change_protocol(struct rc_dev *dev, u64 rc_type); +extern int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz); extern int dib0700_device_count; extern int dvb_usb_dib0700_ir_proto; diff --git a/drivers/media/dvb/dvb-usb/dib0700_core.c b/drivers/media/dvb/dvb-usb/dib0700_core.c index 98ffb40..ebda77d 100644 --- a/drivers/media/dvb/dvb-usb/dib0700_core.c +++ b/drivers/media/dvb/dvb-usb/dib0700_core.c @@ -328,6 +328,30 @@ static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll, return dib0700_ctrl_wr(d, b, 10); } +int dib0700_set_i2c_speed(struct dvb_usb_device *d, u16 scl_kHz) +{ + u16 divider; + u8 b[8]; + + if (scl_kHz == 0) + return -EINVAL; + + b[0] = REQUEST_SET_I2C_PARAM; + divider = (u16) (30000 / scl_kHz); + b[2] = (u8) (divider >> 8); + b[3] = (u8) (divider & 0xff); + divider = (u16) (72000 / scl_kHz); + b[4] = (u8) (divider >> 8); + b[5] = (u8) (divider & 0xff); + divider = (u16) (72000 / scl_kHz); /* clock: 72MHz */ + b[6] = (u8) (divider >> 8); + b[7] = (u8) (divider & 0xff); + + deb_info("setting I2C speed: %04x %04x %04x (%d kHz).", (b[2] << 8) | (b[3]), (b[4] << 8) | b[5], (b[6] << 8) | b[7], scl_kHz); + return dib0700_ctrl_wr(d, b, 8); +} + + int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3) { switch (clk_MHz) { @@ -459,10 +483,20 @@ int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff) deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id); - if (onoff) - st->channel_state |= 1 << adap->id; - else - st->channel_state &= ~(1 << adap->id); + st->channel_state &= ~0x3; + if ((adap->stream.props.endpoint != 2) && (adap->stream.props.endpoint != 3)) { + deb_info("the endpoint number (%i) is not correct, use the adapter id instead", adap->stream.props.endpoint); + if (onoff) + st->channel_state |= 1 << (adap->id); + else + st->channel_state |= 1 << ~(adap->id); + } + else { + if (onoff) + st->channel_state |= 1 << (adap->stream.props.endpoint-2); + else + st->channel_state |= 1 << (3-adap->stream.props.endpoint); + } b[2] |= st->channel_state; _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
