From f056d29eebd2c8800cf42528ba0470c77a928821 Mon Sep 17 00:00:00 2001 From: Andy Walls Date: Fri, 31 Oct 2008 20:49:12 -0300 Subject: V4L/DVB (9510): cx18: Fix write retries for registers that always change - part 2. cx18: Fix write retries for registers that always change - part 2. Some registers, especially interrupt related ones, will never read back the value just written. Modified interrupt register readback checks to make sure the intended effect was achieved. Signed-off-by: Andy Walls Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/cx18/cx18-io.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/media/video/cx18/cx18-io.h') diff --git a/drivers/media/video/cx18/cx18-io.h b/drivers/media/video/cx18/cx18-io.h index 287a5e8bf67..425244453ea 100644 --- a/drivers/media/video/cx18/cx18-io.h +++ b/drivers/media/video/cx18/cx18-io.h @@ -133,6 +133,8 @@ static inline void cx18_writel(struct cx18 *cx, u32 val, void __iomem *addr) cx18_writel_noretry(cx, val, addr); } +void _cx18_writel_expect(struct cx18 *cx, u32 val, void __iomem *addr, + u32 eval, u32 mask); static inline void cx18_writew_noretry(struct cx18 *cx, u16 val, void __iomem *addr) @@ -271,6 +273,21 @@ static inline void cx18_write_reg(struct cx18 *cx, u32 val, u32 reg) cx18_write_reg_noretry(cx, val, reg); } +static inline void _cx18_write_reg_expect(struct cx18 *cx, u32 val, u32 reg, + u32 eval, u32 mask) +{ + _cx18_writel_expect(cx, val, cx->reg_mem + reg, eval, mask); +} + +static inline void cx18_write_reg_expect(struct cx18 *cx, u32 val, u32 reg, + u32 eval, u32 mask) +{ + if (cx18_retry_mmio) + _cx18_write_reg_expect(cx, val, reg, eval, mask); + else + cx18_write_reg_noretry(cx, val, reg); +} + static inline u32 cx18_read_reg_noretry(struct cx18 *cx, u32 reg) { -- cgit v1.2.3