From ced07371d931884c9c89b66bfe951ea0148a8d08 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sun, 2 Nov 2008 10:59:04 -0300 Subject: V4L/DVB (9512): cx18: Fix write retries for registers that always change - part 3. cx18: Fix write retries for registers that always change - part 3. Fix the io for the rest of the registers that will often not read back the value just written. Modified register readback checks to make sure the intended effect was achieved without constantly rewriting the registers. The one outstanding register remaining is 0xc72014 CX18_AUDIO_ENABLE, whose behavior on writes I have yet to determine. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-i2c.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) (limited to 'drivers/media/video/cx18/cx18-i2c.c') diff --git a/drivers/media/video/cx18/cx18-i2c.c b/drivers/media/video/cx18/cx18-i2c.c index aa09e557b195..824efbecb34c 100644 --- a/drivers/media/video/cx18/cx18-i2c.c +++ b/drivers/media/video/cx18/cx18-i2c.c @@ -27,6 +27,7 @@ #include "cx18-gpio.h" #include "cx18-av-core.h" #include "cx18-i2c.h" +#include "cx18-irq.h" #define CX18_REG_I2C_1_WR 0xf15000 #define CX18_REG_I2C_1_RD 0xf15008 @@ -396,22 +397,31 @@ int init_cx18_i2c(struct cx18 *cx) if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { /* Reset/Unreset I2C hardware block */ /* Clock select 220MHz */ - cx18_write_reg(cx, 0x10000000, 0xc71004); + cx18_write_reg_expect(cx, 0x10000000, 0xc71004, + 0x00000000, 0x10001000); /* Clock Enable */ - cx18_write_reg_sync(cx, 0x10001000, 0xc71024); + cx18_write_reg_expect(cx, 0x10001000, 0xc71024, + 0x00001000, 0x10001000); } /* courtesy of Steven Toth */ - cx18_write_reg_sync(cx, 0x00c00000, 0xc7001c); + cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); + if (!cx18_retry_mmio) + (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); - cx18_write_reg_sync(cx, 0x00c000c0, 0xc7001c); + cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); + if (!cx18_retry_mmio) + (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); - cx18_write_reg_sync(cx, 0x00c00000, 0xc7001c); + cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); + if (!cx18_retry_mmio) + (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); /* Set to edge-triggered intrs. */ - cx18_write_reg_sync(cx, 0x00c00000, 0xc730c8); + cx18_write_reg(cx, 0x00c00000, 0xc730c8); /* Clear any stale intrs */ - cx18_write_reg_sync(cx, 0x00c00000, 0xc730c4); + cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, + ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); /* Hw I2C1 Clock Freq ~100kHz */ cx18_write_reg_sync(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); -- cgit v1.2.1 From 3f75c6161f28e6a17c547daf552c1127c805c5e7 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sun, 16 Nov 2008 23:33:41 -0300 Subject: V4L/DVB (9724): cx18: Streamline cx18-io[ch] wrappers and enforce MMIO retry strategy cx18: Streamline cx18-io[ch] wrappers and enforce MMIO retry strategy so that write retries always occur and read retries never occur (as they never help). Remove MMIO statistics logging to speed up MMIO accesses. Deprecate & ignore retry_mmio and mmio_ndelay module parameters, to essentially force retry_mmio=1 and mmio_ndelay=0. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-i2c.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) (limited to 'drivers/media/video/cx18/cx18-i2c.c') diff --git a/drivers/media/video/cx18/cx18-i2c.c b/drivers/media/video/cx18/cx18-i2c.c index 824efbecb34c..098635072543 100644 --- a/drivers/media/video/cx18/cx18-i2c.c +++ b/drivers/media/video/cx18/cx18-i2c.c @@ -161,9 +161,9 @@ static void cx18_setscl(void *data, int state) u32 r = cx18_read_reg(cx, addr); if (state) - cx18_write_reg_sync(cx, r | SETSCL_BIT, addr); + cx18_write_reg(cx, r | SETSCL_BIT, addr); else - cx18_write_reg_sync(cx, r & ~SETSCL_BIT, addr); + cx18_write_reg(cx, r & ~SETSCL_BIT, addr); } static void cx18_setsda(void *data, int state) @@ -174,9 +174,9 @@ static void cx18_setsda(void *data, int state) u32 r = cx18_read_reg(cx, addr); if (state) - cx18_write_reg_sync(cx, r | SETSDL_BIT, addr); + cx18_write_reg(cx, r | SETSDL_BIT, addr); else - cx18_write_reg_sync(cx, r & ~SETSDL_BIT, addr); + cx18_write_reg(cx, r & ~SETSDL_BIT, addr); } static int cx18_getscl(void *data) @@ -405,16 +405,10 @@ int init_cx18_i2c(struct cx18 *cx) } /* courtesy of Steven Toth */ cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); - if (!cx18_retry_mmio) - (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); - if (!cx18_retry_mmio) - (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); - if (!cx18_retry_mmio) - (void) cx18_read_reg(cx, 0xc7001c); /* sync */ mdelay(10); /* Set to edge-triggered intrs. */ @@ -424,12 +418,12 @@ int init_cx18_i2c(struct cx18 *cx) ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); /* Hw I2C1 Clock Freq ~100kHz */ - cx18_write_reg_sync(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); + cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); cx18_setscl(&cx->i2c_algo_cb_data[0], 1); cx18_setsda(&cx->i2c_algo_cb_data[0], 1); /* Hw I2C2 Clock Freq ~100kHz */ - cx18_write_reg_sync(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); + cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); cx18_setscl(&cx->i2c_algo_cb_data[1], 1); cx18_setsda(&cx->i2c_algo_cb_data[1], 1); -- cgit v1.2.1 From 1ed9dcc8ef61c35a620fecc039c01f2c50dceb80 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Sat, 22 Nov 2008 01:37:34 -0300 Subject: V4L/DVB (9728): cx18: Copyright attribution update for files modified by awalls Add copyright attribution for files modified by awalls in 2008 Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-i2c.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/media/video/cx18/cx18-i2c.c') diff --git a/drivers/media/video/cx18/cx18-i2c.c b/drivers/media/video/cx18/cx18-i2c.c index 098635072543..8941f58bed7f 100644 --- a/drivers/media/video/cx18/cx18-i2c.c +++ b/drivers/media/video/cx18/cx18-i2c.c @@ -4,6 +4,7 @@ * Derived from ivtv-i2c.c * * Copyright (C) 2007 Hans Verkuil + * Copyright (C) 2008 Andy Walls * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by -- cgit v1.2.1