diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-23 21:12:49 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-05-23 21:12:49 -0700 |
commit | df462b3dbeeaae7141f1b63cbfcc1e1bae6a85fc (patch) | |
tree | bca52fce066159f136d75c69e79016422212cb1d /drivers/media/dvb/frontends/dib7000m.c | |
parent | 343800e7d20944aead238c2c6e3f7789f8b6587c (diff) | |
parent | cf25220677b3f10468a74278130fe224f73632a6 (diff) |
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (247 commits)
[media] gspca - sunplus: Fix some warnings and simplify code
[media] gspca: Fix some warnings tied to 'no debug'
[media] gspca: Unset debug by default
[media] gspca - cpia1: Remove a bad conditional compilation instruction
[media] gspca - main: Remove USB traces
[media] gspca - main: Version change to 2.13
[media] gspca - stk014 / t613: Accept the index 0 in querymenu
[media] gspca - kinect: Remove __devinitdata
[media] gspca - cpia1: Fix some warnings
[media] video/Kconfig: Fix mis-classified devices
[media] support for medion dvb stick 1660:1921
[media] tm6000: fix uninitialized field, change prink to dprintk
[media] cx231xx: Add support for Iconbit U100
[media] saa7134 add new TV cards
[media] Use a more consistent value for RC repeat period
[media] cx18: Move spinlock and vb_type initialisation into stream_init
[media] tm6000: remove tm6010 sif audio start and stop
[media] tm6000: remove unused exports
[media] tm6000: add pts logging
[media] tm6000: change from ioctl to unlocked_ioctl
...
Diffstat (limited to 'drivers/media/dvb/frontends/dib7000m.c')
-rw-r--r-- | drivers/media/dvb/frontends/dib7000m.c | 49 |
1 files changed, 32 insertions, 17 deletions
diff --git a/drivers/media/dvb/frontends/dib7000m.c b/drivers/media/dvb/frontends/dib7000m.c index 289a79837f2..79cb1c20df2 100644 --- a/drivers/media/dvb/frontends/dib7000m.c +++ b/drivers/media/dvb/frontends/dib7000m.c @@ -50,6 +50,11 @@ struct dib7000m_state { u16 revision; u8 agc_state; + + /* for the I2C transfer */ + struct i2c_msg msg[2]; + u8 i2c_write_buffer[4]; + u8 i2c_read_buffer[2]; }; enum dib7000m_power_mode { @@ -64,29 +69,39 @@ enum dib7000m_power_mode { static u16 dib7000m_read_word(struct dib7000m_state *state, u16 reg) { - u8 wb[2] = { (reg >> 8) | 0x80, reg & 0xff }; - u8 rb[2]; - struct i2c_msg msg[2] = { - { .addr = state->i2c_addr >> 1, .flags = 0, .buf = wb, .len = 2 }, - { .addr = state->i2c_addr >> 1, .flags = I2C_M_RD, .buf = rb, .len = 2 }, - }; - - if (i2c_transfer(state->i2c_adap, msg, 2) != 2) + state->i2c_write_buffer[0] = (reg >> 8) | 0x80; + state->i2c_write_buffer[1] = reg & 0xff; + + memset(state->msg, 0, 2 * sizeof(struct i2c_msg)); + state->msg[0].addr = state->i2c_addr >> 1; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 2; + state->msg[1].addr = state->i2c_addr >> 1; + state->msg[1].flags = I2C_M_RD; + state->msg[1].buf = state->i2c_read_buffer; + state->msg[1].len = 2; + + if (i2c_transfer(state->i2c_adap, state->msg, 2) != 2) dprintk("i2c read error on %d",reg); - return (rb[0] << 8) | rb[1]; + return (state->i2c_read_buffer[0] << 8) | state->i2c_read_buffer[1]; } static int dib7000m_write_word(struct dib7000m_state *state, u16 reg, u16 val) { - u8 b[4] = { - (reg >> 8) & 0xff, reg & 0xff, - (val >> 8) & 0xff, val & 0xff, - }; - struct i2c_msg msg = { - .addr = state->i2c_addr >> 1, .flags = 0, .buf = b, .len = 4 - }; - return i2c_transfer(state->i2c_adap, &msg, 1) != 1 ? -EREMOTEIO : 0; + state->i2c_write_buffer[0] = (reg >> 8) & 0xff; + state->i2c_write_buffer[1] = reg & 0xff; + state->i2c_write_buffer[2] = (val >> 8) & 0xff; + state->i2c_write_buffer[3] = val & 0xff; + + memset(&state->msg[0], 0, sizeof(struct i2c_msg)); + state->msg[0].addr = state->i2c_addr >> 1; + state->msg[0].flags = 0; + state->msg[0].buf = state->i2c_write_buffer; + state->msg[0].len = 4; + + return i2c_transfer(state->i2c_adap, state->msg, 1) != 1 ? -EREMOTEIO : 0; } static void dib7000m_write_tab(struct dib7000m_state *state, u16 *buf) { |