From 5a07055a3849574f4fbe5d0ce7cd2d26ab9a37c1 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Wed, 8 Oct 2008 10:01:41 +0300 Subject: ARM: OMAP: Fixes to omap_mcbsp_request function Bootloader may let McBSP logic running so make sure that block is idle before requesting IRQs. Also make sure that TX and RX waitqueues are initialized before request_irq. Signed-off-by: Jarkko Nikula Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/mcbsp.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c index f27e641bf81..af33fc713e1 100644 --- a/arch/arm/plat-omap/mcbsp.c +++ b/arch/arm/plat-omap/mcbsp.c @@ -234,8 +234,16 @@ int omap_mcbsp_request(unsigned int id) mcbsp->free = 0; spin_unlock(&mcbsp->lock); + /* + * Make sure that transmitter, receiver and sample-rate generator are + * not running before activating IRQs. + */ + OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR1, 0); + OMAP_MCBSP_WRITE(mcbsp->io_base, SPCR2, 0); + if (mcbsp->io_type == OMAP_MCBSP_IRQ_IO) { /* We need to get IRQs here */ + init_completion(&mcbsp->tx_irq_completion); err = request_irq(mcbsp->tx_irq, omap_mcbsp_tx_irq_handler, 0, "McBSP", (void *)mcbsp); if (err != 0) { @@ -245,8 +253,7 @@ int omap_mcbsp_request(unsigned int id) return err; } - init_completion(&mcbsp->tx_irq_completion); - + init_completion(&mcbsp->rx_irq_completion); err = request_irq(mcbsp->rx_irq, omap_mcbsp_rx_irq_handler, 0, "McBSP", (void *)mcbsp); if (err != 0) { @@ -256,8 +263,6 @@ int omap_mcbsp_request(unsigned int id) free_irq(mcbsp->tx_irq, (void *)mcbsp); return err; } - - init_completion(&mcbsp->rx_irq_completion); } return 0; -- cgit v1.2.3-70-g09d2