ARM: mach-shmobile: sh73a0 DMA Engine support for SY-DMAC
Add SY-DMAC support via shdma.c to the sh73a0 SoC
including slave ids, platform data and clock bindings.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/arm/mach-shmobile/setup-sh73a0.c b/arch/arm/mach-shmobile/setup-sh73a0.c
index 685c40a..e46821c 100644
--- a/arch/arm/mach-shmobile/setup-sh73a0.c
+++ b/arch/arm/mach-shmobile/setup-sh73a0.c
@@ -27,9 +27,11 @@
#include <linux/input.h>
#include <linux/io.h>
#include <linux/serial_sci.h>
+#include <linux/sh_dma.h>
#include <linux/sh_intc.h>
#include <linux/sh_timer.h>
#include <mach/hardware.h>
+#include <mach/sh73a0.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -392,6 +394,242 @@
.num_resources = ARRAY_SIZE(i2c4_resources),
};
+/* Transmit sizes and respective CHCR register values */
+enum {
+ XMIT_SZ_8BIT = 0,
+ XMIT_SZ_16BIT = 1,
+ XMIT_SZ_32BIT = 2,
+ XMIT_SZ_64BIT = 7,
+ XMIT_SZ_128BIT = 3,
+ XMIT_SZ_256BIT = 4,
+ XMIT_SZ_512BIT = 5,
+};
+
+/* log2(size / 8) - used to calculate number of transfers */
+#define TS_SHIFT { \
+ [XMIT_SZ_8BIT] = 0, \
+ [XMIT_SZ_16BIT] = 1, \
+ [XMIT_SZ_32BIT] = 2, \
+ [XMIT_SZ_64BIT] = 3, \
+ [XMIT_SZ_128BIT] = 4, \
+ [XMIT_SZ_256BIT] = 5, \
+ [XMIT_SZ_512BIT] = 6, \
+}
+
+#define TS_INDEX2VAL(i) ((((i) & 3) << 3) | (((i) & 0xc) << (20 - 2)))
+#define CHCR_TX(xmit_sz) (DM_FIX | SM_INC | 0x800 | TS_INDEX2VAL((xmit_sz)))
+#define CHCR_RX(xmit_sz) (DM_INC | SM_FIX | 0x800 | TS_INDEX2VAL((xmit_sz)))
+
+static const struct sh_dmae_slave_config sh73a0_dmae_slaves[] = {
+ {
+ .slave_id = SHDMA_SLAVE_SCIF0_TX,
+ .addr = 0xe6c40020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x21,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF0_RX,
+ .addr = 0xe6c40024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x22,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF1_TX,
+ .addr = 0xe6c50020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x25,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF1_RX,
+ .addr = 0xe6c50024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x26,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF2_TX,
+ .addr = 0xe6c60020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x29,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF2_RX,
+ .addr = 0xe6c60024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x2a,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF3_TX,
+ .addr = 0xe6c70020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x2d,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF3_RX,
+ .addr = 0xe6c70024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x2e,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF4_TX,
+ .addr = 0xe6c80020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x39,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF4_RX,
+ .addr = 0xe6c80024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x3a,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF5_TX,
+ .addr = 0xe6cb0020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x35,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF5_RX,
+ .addr = 0xe6cb0024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x36,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF6_TX,
+ .addr = 0xe6cc0020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x1d,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF6_RX,
+ .addr = 0xe6cc0024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x1e,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF7_TX,
+ .addr = 0xe6cd0020,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x19,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF7_RX,
+ .addr = 0xe6cd0024,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x1a,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF8_TX,
+ .addr = 0xe6c30040,
+ .chcr = CHCR_TX(XMIT_SZ_8BIT),
+ .mid_rid = 0x3d,
+ }, {
+ .slave_id = SHDMA_SLAVE_SCIF8_RX,
+ .addr = 0xe6c30060,
+ .chcr = CHCR_RX(XMIT_SZ_8BIT),
+ .mid_rid = 0x3e,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI0_TX,
+ .addr = 0xee100030,
+ .chcr = CHCR_TX(XMIT_SZ_16BIT),
+ .mid_rid = 0xc1,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI0_RX,
+ .addr = 0xee100030,
+ .chcr = CHCR_RX(XMIT_SZ_16BIT),
+ .mid_rid = 0xc2,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI1_TX,
+ .addr = 0xee120030,
+ .chcr = CHCR_TX(XMIT_SZ_16BIT),
+ .mid_rid = 0xc9,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI1_RX,
+ .addr = 0xee120030,
+ .chcr = CHCR_RX(XMIT_SZ_16BIT),
+ .mid_rid = 0xca,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI2_TX,
+ .addr = 0xee140030,
+ .chcr = CHCR_TX(XMIT_SZ_16BIT),
+ .mid_rid = 0xcd,
+ }, {
+ .slave_id = SHDMA_SLAVE_SDHI2_RX,
+ .addr = 0xee140030,
+ .chcr = CHCR_RX(XMIT_SZ_16BIT),
+ .mid_rid = 0xce,
+ }, {
+ .slave_id = SHDMA_SLAVE_MMCIF_TX,
+ .addr = 0xe6bd0034,
+ .chcr = CHCR_TX(XMIT_SZ_32BIT),
+ .mid_rid = 0xd1,
+ }, {
+ .slave_id = SHDMA_SLAVE_MMCIF_RX,
+ .addr = 0xe6bd0034,
+ .chcr = CHCR_RX(XMIT_SZ_32BIT),
+ .mid_rid = 0xd2,
+ },
+};
+
+#define DMAE_CHANNEL(_offset) \
+ { \
+ .offset = _offset - 0x20, \
+ .dmars = _offset - 0x20 + 0x40, \
+ }
+
+static const struct sh_dmae_channel sh73a0_dmae_channels[] = {
+ DMAE_CHANNEL(0x8000),
+ DMAE_CHANNEL(0x8080),
+ DMAE_CHANNEL(0x8100),
+ DMAE_CHANNEL(0x8180),
+ DMAE_CHANNEL(0x8200),
+ DMAE_CHANNEL(0x8280),
+ DMAE_CHANNEL(0x8300),
+ DMAE_CHANNEL(0x8380),
+ DMAE_CHANNEL(0x8400),
+ DMAE_CHANNEL(0x8480),
+ DMAE_CHANNEL(0x8500),
+ DMAE_CHANNEL(0x8580),
+ DMAE_CHANNEL(0x8600),
+ DMAE_CHANNEL(0x8680),
+ DMAE_CHANNEL(0x8700),
+ DMAE_CHANNEL(0x8780),
+ DMAE_CHANNEL(0x8800),
+ DMAE_CHANNEL(0x8880),
+ DMAE_CHANNEL(0x8900),
+ DMAE_CHANNEL(0x8980),
+};
+
+static const unsigned int ts_shift[] = TS_SHIFT;
+
+static struct sh_dmae_pdata sh73a0_dmae_platform_data = {
+ .slave = sh73a0_dmae_slaves,
+ .slave_num = ARRAY_SIZE(sh73a0_dmae_slaves),
+ .channel = sh73a0_dmae_channels,
+ .channel_num = ARRAY_SIZE(sh73a0_dmae_channels),
+ .ts_low_shift = 3,
+ .ts_low_mask = 0x18,
+ .ts_high_shift = (20 - 2), /* 2 bits for shifted low TS */
+ .ts_high_mask = 0x00300000,
+ .ts_shift = ts_shift,
+ .ts_shift_num = ARRAY_SIZE(ts_shift),
+ .dmaor_init = DMAOR_DME,
+};
+
+static struct resource sh73a0_dmae_resources[] = {
+ {
+ /* Registers including DMAOR and channels including DMARSx */
+ .start = 0xfe000020,
+ .end = 0xfe008a00 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ /* DMA error IRQ */
+ .start = gic_spi(129),
+ .end = gic_spi(129),
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ /* IRQ for channels 0-19 */
+ .start = gic_spi(109),
+ .end = gic_spi(128),
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device dma0_device = {
+ .name = "sh-dma-engine",
+ .id = 0,
+ .resource = sh73a0_dmae_resources,
+ .num_resources = ARRAY_SIZE(sh73a0_dmae_resources),
+ .dev = {
+ .platform_data = &sh73a0_dmae_platform_data,
+ },
+};
+
static struct platform_device *sh73a0_early_devices[] __initdata = {
&scif0_device,
&scif1_device,
@@ -413,10 +651,16 @@
&i2c2_device,
&i2c3_device,
&i2c4_device,
+ &dma0_device,
};
+#define SRCR2 0xe61580b0
+
void __init sh73a0_add_standard_devices(void)
{
+ /* Clear software reset bit on SY-DMAC module */
+ __raw_writel(__raw_readl(SRCR2) & ~(1 << 18), SRCR2);
+
platform_add_devices(sh73a0_early_devices,
ARRAY_SIZE(sh73a0_early_devices));
platform_add_devices(sh73a0_late_devices,