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authorLinus Walleij <linus.walleij@stericsson.com>2010-05-27 15:21:26 -0700
committerDan Williams <dan.j.williams@intel.com>2010-05-27 15:21:26 -0700
commit7b8ddb06e54ad98edeb7951f317aee4d1feda9d6 (patch)
treec18c268a0bf1b9eaeb5825d3e84bb3617c6c5fdb /arch/arm/mach-ux500/devices-db8500.c
parentb3040e40675ec2c43542331cd30d4ee3dae797e8 (diff)
DMAENGINE: DMA40 U8500 platform configuration
This completes the DMA40 support with the platform-specific configuration for U8500/DB8500. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> Reviewed-by: Alessandro Rubini <rubini@unipv.it> Cc: STEricsson_nomadik_linux@list.st.com Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> [fixed up dma40_{tx|rx}_map declaration/initialization] Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'arch/arm/mach-ux500/devices-db8500.c')
-rw-r--r--arch/arm/mach-ux500/devices-db8500.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/devices-db8500.c b/arch/arm/mach-ux500/devices-db8500.c
index 20334236afc..82290342194 100644
--- a/arch/arm/mach-ux500/devices-db8500.c
+++ b/arch/arm/mach-ux500/devices-db8500.c
@@ -12,9 +12,13 @@
#include <linux/gpio.h>
#include <linux/amba/bus.h>
+#include <plat/ste_dma40.h>
+
#include <mach/hardware.h>
#include <mach/setup.h>
+#include "ste-dma40-db8500.h"
+
static struct nmk_gpio_platform_data u8500_gpio_data[] = {
GPIO_DATA("GPIO-0-31", 0),
GPIO_DATA("GPIO-32-63", 32), /* 37..63 not routed to pin */
@@ -105,3 +109,108 @@ struct platform_device u8500_i2c4_device = {
.resource = u8500_i2c4_resources,
.num_resources = ARRAY_SIZE(u8500_i2c4_resources),
};
+
+static struct resource dma40_resources[] = {
+ [0] = {
+ .start = U8500_DMA_BASE,
+ .end = U8500_DMA_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ .name = "base",
+ },
+ [1] = {
+ .start = U8500_DMA_LCPA_BASE,
+ .end = U8500_DMA_LCPA_BASE + SZ_4K - 1,
+ .flags = IORESOURCE_MEM,
+ .name = "lcpa",
+ },
+ [2] = {
+ .start = U8500_DMA_LCLA_BASE,
+ .end = U8500_DMA_LCLA_BASE + 16 * 1024 - 1,
+ .flags = IORESOURCE_MEM,
+ .name = "lcla",
+ },
+ [3] = {
+ .start = IRQ_DMA,
+ .end = IRQ_DMA,
+ .flags = IORESOURCE_IRQ}
+};
+
+/* Default configuration for physcial memcpy */
+struct stedma40_chan_cfg dma40_memcpy_conf_phy = {
+ .channel_type = (STEDMA40_CHANNEL_IN_PHY_MODE |
+ STEDMA40_LOW_PRIORITY_CHANNEL |
+ STEDMA40_PCHAN_BASIC_MODE),
+ .dir = STEDMA40_MEM_TO_MEM,
+
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .src_info.psize = STEDMA40_PSIZE_PHY_1,
+
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.psize = STEDMA40_PSIZE_PHY_1,
+
+};
+/* Default configuration for logical memcpy */
+struct stedma40_chan_cfg dma40_memcpy_conf_log = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE |
+ STEDMA40_LOW_PRIORITY_CHANNEL |
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG |
+ STEDMA40_NO_TIM_FOR_LINK),
+ .dir = STEDMA40_MEM_TO_MEM,
+
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .src_info.psize = STEDMA40_PSIZE_LOG_1,
+
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.psize = STEDMA40_PSIZE_LOG_1,
+
+};
+
+/*
+ * Mapping between destination event lines and physical device address.
+ * The event line is tied to a device and therefor the address is constant.
+ */
+static const dma_addr_t dma40_tx_map[STEDMA40_NR_DEV];
+
+/* Mapping between source event lines and physical device address */
+static const dma_addr_t dma40_rx_map[STEDMA40_NR_DEV];
+
+/* Reserved event lines for memcpy only */
+static int dma40_memcpy_event[] = {
+ STEDMA40_MEMCPY_TX_1,
+ STEDMA40_MEMCPY_TX_2,
+ STEDMA40_MEMCPY_TX_3,
+ STEDMA40_MEMCPY_TX_4,
+};
+
+static struct stedma40_platform_data dma40_plat_data = {
+ .dev_len = STEDMA40_NR_DEV,
+ .dev_rx = dma40_rx_map,
+ .dev_tx = dma40_tx_map,
+ .memcpy = dma40_memcpy_event,
+ .memcpy_len = ARRAY_SIZE(dma40_memcpy_event),
+ .memcpy_conf_phy = &dma40_memcpy_conf_phy,
+ .memcpy_conf_log = &dma40_memcpy_conf_log,
+ .llis_per_log = 8,
+};
+
+struct platform_device u8500_dma40_device = {
+ .dev = {
+ .platform_data = &dma40_plat_data,
+ },
+ .name = "dma40",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(dma40_resources),
+ .resource = dma40_resources
+};
+
+void dma40_u8500ed_fixup(void)
+{
+ dma40_plat_data.memcpy = NULL;
+ dma40_plat_data.memcpy_len = 0;
+ dma40_resources[0].start = U8500_DMA_BASE_ED;
+ dma40_resources[0].end = U8500_DMA_BASE_ED + SZ_4K - 1;
+}