[PATCH] sh: DMA updates
This extends the current SH DMA API somewhat to support a proper virtual
channel abstraction, and also works to represent this through the driver model
by giving each DMAC its own platform device.
There's also a few other minor changes to support a few new CPU subtypes, and
make TEI generation for the SH DMAC configurable.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/asm-sh/cpu-sh4/dma.h b/include/asm-sh/cpu-sh4/dma.h
index e2b91ad..0dfe61f 100644
--- a/include/asm-sh/cpu-sh4/dma.h
+++ b/include/asm-sh/cpu-sh4/dma.h
@@ -1,17 +1,49 @@
#ifndef __ASM_CPU_SH4_DMA_H
#define __ASM_CPU_SH4_DMA_H
+#ifdef CONFIG_CPU_SH4A
+#define SH_DMAC_BASE 0xfc808020
+#else
#define SH_DMAC_BASE 0xffa00000
+#endif
-#define SAR ((unsigned long[]){SH_DMAC_BASE + 0x00, SH_DMAC_BASE + 0x10, \
- SH_DMAC_BASE + 0x20, SH_DMAC_BASE + 0x30})
-#define DAR ((unsigned long[]){SH_DMAC_BASE + 0x04, SH_DMAC_BASE + 0x14, \
- SH_DMAC_BASE + 0x24, SH_DMAC_BASE + 0x34})
-#define DMATCR ((unsigned long[]){SH_DMAC_BASE + 0x08, SH_DMAC_BASE + 0x18, \
- SH_DMAC_BASE + 0x28, SH_DMAC_BASE + 0x38})
-#define CHCR ((unsigned long[]){SH_DMAC_BASE + 0x0c, SH_DMAC_BASE + 0x1c, \
- SH_DMAC_BASE + 0x2c, SH_DMAC_BASE + 0x3c})
-#define DMAOR (SH_DMAC_BASE + 0x40)
+/* Definitions for the SuperH DMAC */
+#define TM_BURST 0x0000080
+#define TS_8 0x00000010
+#define TS_16 0x00000020
+#define TS_32 0x00000030
+#define TS_64 0x00000000
+
+#define CHCR_TS_MASK 0x30
+#define CHCR_TS_SHIFT 4
+
+#define DMAOR_COD 0x00000008
+
+#define DMAOR_INIT ( 0x8000 | DMAOR_DME )
+
+/*
+ * The SuperH DMAC supports a number of transmit sizes, we list them here,
+ * with their respective values as they appear in the CHCR registers.
+ *
+ * Defaults to a 64-bit transfer size.
+ */
+enum {
+ XMIT_SZ_64BIT,
+ XMIT_SZ_8BIT,
+ XMIT_SZ_16BIT,
+ XMIT_SZ_32BIT,
+ XMIT_SZ_256BIT,
+};
+
+/*
+ * The DMA count is defined as the number of bytes to transfer.
+ */
+static unsigned int ts_shift[] __attribute__ ((used)) = {
+ [XMIT_SZ_64BIT] = 3,
+ [XMIT_SZ_8BIT] = 0,
+ [XMIT_SZ_16BIT] = 1,
+ [XMIT_SZ_32BIT] = 2,
+ [XMIT_SZ_256BIT] = 5,
+};
#endif /* __ASM_CPU_SH4_DMA_H */
-