From 732ce16066964bb7b60947750e48374cc32bd310 Mon Sep 17 00:00:00 2001 From: eric miao Date: Fri, 23 Nov 2007 14:55:59 +0800 Subject: [ARM] pxa: ensure SSP TX FIFO is empty instead of not full for pxa3xx Signed-off-by: eric miao Signed-off-by: Russell King --- arch/arm/mach-pxa/ssp.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'arch/arm/mach-pxa/ssp.c') diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c index 575b662200a..4954da907d4 100644 --- a/arch/arm/mach-pxa/ssp.c +++ b/arch/arm/mach-pxa/ssp.c @@ -138,6 +138,16 @@ int ssp_flush(struct ssp_dev *dev) struct ssp_device *ssp = dev->ssp; int timeout = TIMEOUT * 2; + /* ensure TX FIFO is empty instead of not full */ + if (cpu_is_pxa3xx()) { + while (__raw_readl(ssp->mmio_base + SSSR) & 0xf00) { + if (!--timeout) + return -ETIMEDOUT; + cpu_relax(); + } + timeout = TIMEOUT * 2; + } + do { while (__raw_readl(ssp->mmio_base + SSSR) & SSSR_RNE) { if (!--timeout) -- cgit v1.2.3