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Commit 73a19e4c authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Paul Mundt
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serial: sh-sci: Add DMA support. 



Support using DMA for sending and receiving data over SCI(F) interfaces of
various SH SoCs.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent c014906a

drivers/serial/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -1009,6 +1009,10 @@ config SERIAL_SH_SCI_CONSOLE 
	depends on SERIAL_SH_SCI=y

	select SERIAL_CORE_CONSOLE



config SERIAL_SH_SCI_DMA

	bool "DMA support"

	depends on SERIAL_SH_SCI && SH_DMAE && EXPERIMENTAL



config SERIAL_PNX8XXX

	bool "Enable PNX8XXX SoCs' UART Support"

	depends on MIPS && (SOC_PNX8550 || SOC_PNX833X)

drivers/serial/sh-sci.c

+572 −46

File changed.

Preview size limit exceeded, changes collapsed.

include/linux/serial_sci.h

+6 −0
Original line number Diff line number Diff line
@@ -2,6 +2,7 @@ 
#define __LINUX_SERIAL_SCI_H



#include <linux/serial_core.h>

#include <asm/dmaengine.h>



/*

 * Generic header for SuperH SCI(F) (used by sh/sh64/h8300 and related parts)
@@ -16,6 +17,8 @@ enum { 
	SCIx_NR_IRQS,

};



struct device;



/*

 * Platform device specific platform_data struct

 */
@@ -26,6 +29,9 @@ struct plat_sci_port { 
	unsigned int	type;			/* SCI / SCIF / IRDA */

	upf_t		flags;			/* UPF_* flags */

	char		*clk;			/* clock string */

	struct device	*dma_dev;

	enum sh_dmae_slave_chan_id dma_slave_tx;

	enum sh_dmae_slave_chan_id dma_slave_rx;

};



#endif /* __LINUX_SERIAL_SCI_H */