Prev: [PATCH 01/13] ARM: define the PrimeCell DMA API v6
Next: [PATCH 03/13] DMAENGINE: add generic PrimeCell interface to DMA40 v2
From: Linus Walleij on 11 Jun 2010 11:30
This will configure the platform data for the PL011 and PL022
PrimeCells found in the Ux500 to use DMA with the generic
PrimeCell DMA engine.

Signed-off-by: Linus Walleij <linus.walleij(a)stericsson.com>
---
arch/arm/mach-ux500/board-mop500.c | 12 ---
arch/arm/mach-ux500/devices-db8500.c | 92 ++++++++++++++++++++++-
arch/arm/mach-ux500/devices.c | 134 +++++++++++++++++++++++++++++++++-
3 files changed, 220 insertions(+), 18 deletions(-)

diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index bb8d7b7..526b2e2 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -60,16 +60,6 @@ static struct spi_board_info u8500_spi_devices[] = {
},
};

-static struct pl022_ssp_controller ssp0_platform_data = {
- .bus_id = 0,
- /* pl022 not yet supports dma */
- .enable_dma = 0,
- /* on this platform, gpio 31,142,144,214 &
- * 224 are connected as chip selects
- */
- .num_chipselect = 5,
-};
-
#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \
static struct nmk_i2c_controller u8500_i2c##id##_data = { \
/* \
@@ -123,8 +113,6 @@ static void __init u8500_init_machine(void)
ux500_i2c2_device.dev.platform_data = &u8500_i2c2_data;
ux500_i2c3_device.dev.platform_data = &u8500_i2c3_data;

- u8500_ssp0_device.dev.platform_data = &ssp0_platform_data;
-
/* Register the active AMBA devices on this board */
for (i = 0; i < ARRAY_SIZE(amba_devs); i++)
amba_device_register(amba_devs[i], &iomem_resource);
diff --git a/arch/arm/mach-ux500/devices-db8500.c b/arch/arm/mach-ux500/devices-db8500.c
index 8229034..a5c2aee 100644
--- a/arch/arm/mach-ux500/devices-db8500.c
+++ b/arch/arm/mach-ux500/devices-db8500.c
@@ -11,6 +11,7 @@
#include <linux/io.h>
#include <linux/gpio.h>
#include <linux/amba/bus.h>
+#include <linux/amba/pl022.h>

#include <plat/ste_dma40.h>

@@ -55,10 +56,55 @@ struct platform_device u8500_gpio_devs[] = {
GPIO_DEVICE(8),
};

+#ifdef CONFIG_STE_DMA40
+static struct stedma40_chan_cfg ssp0_dma_cfg_rx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = STEDMA40_DEV_SSP0_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg ssp0_dma_cfg_tx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = STEDMA40_DEV_SSP0_TX,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+#endif
+
+static struct pl022_ssp_controller ssp0_platform_data = {
+ .bus_id = 0,
+#ifdef CONFIG_STE_DMA40
+ .enable_dma = 1,
+ .dma_filter = stedma40_filter,
+ .dma_rx_param = &ssp0_dma_cfg_rx,
+ .dma_tx_param = &ssp0_dma_cfg_tx,
+#else
+ .enable_dma = 0,
+#endif
+ /* on this platform, gpio 31,142,144,214 &
+ * 224 are connected as chip selects
+ */
+ .num_chipselect = 5,
+};
+
struct amba_device u8500_ssp0_device = {
.dev = {
.coherent_dma_mask = ~0,
.init_name = "ssp0",
+ .platform_data = &ssp0_platform_data,
},
.res = {
.start = U8500_SSP0_BASE,
@@ -171,12 +217,52 @@ struct stedma40_chan_cfg dma40_memcpy_conf_log = {

/*
* Mapping between destination event lines and physical device address.
- * The event line is tied to a device and therefor the address is constant.
+ * The event line is tied to a device and therefore the address is constant.
+ * When the address comes from a primecell it will be configured in runtime
+ * and we set the address to -1 as a placeholder.
*/
-static const dma_addr_t dma40_tx_map[STEDMA40_NR_DEV];
+static const dma_addr_t dma40_tx_map[STEDMA40_NR_DEV] = {
+ [STEDMA40_DEV_SPI0_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC0_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC1_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC2_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SSP0_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SSP1_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART2_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART1_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART0_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM2_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM0_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM1_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI2_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI1_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI3_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM3_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM4_TX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM5_TX] = -1, /* PrimeCell DMA */
+};

/* Mapping between source event lines and physical device address */
-static const dma_addr_t dma40_rx_map[STEDMA40_NR_DEV];
+static const dma_addr_t dma40_rx_map[STEDMA40_NR_DEV] = {
+ [STEDMA40_DEV_SPI0_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC0_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC1_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MMC2_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SSP0_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SSP1_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART2_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART1_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_UART0_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM2_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM0_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM1_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI2_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI1_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SPI3_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM3_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM4_RX] = -1, /* PrimeCell DMA */
+ [STEDMA40_DEV_SD_MM5_RX] = -1, /* PrimeCell DMA */
+};

/* Reserved event lines for memcpy only */
static int dma40_memcpy_event[] = {
diff --git a/arch/arm/mach-ux500/devices.c b/arch/arm/mach-ux500/devices.c
index 8a26889..f234461 100644
--- a/arch/arm/mach-ux500/devices.c
+++ b/arch/arm/mach-ux500/devices.c
@@ -10,10 +10,22 @@
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/amba/bus.h>
+#include <linux/amba/dma.h>
+#include <linux/amba/serial.h>
+
+#include <plat/ste_dma40.h>

#include <mach/hardware.h>
#include <mach/setup.h>

+/* Channel assignments are per-SoC */
+#ifdef CONFIG_UX500_SOC_DB8500
+#include "ste-dma40-db8500.h"
+#endif
+#if defined(CONFIG_UX500_SOC_DB5500) && defined(CONFIG_STE_DMA40)
+#error "You need to define the DMA channels for DB5500!"
+#endif
+
#define __MEM_4K_RESOURCE(x) \
.res = {.start = (x), .end = (x) + SZ_4K - 1, .flags = IORESOURCE_MEM}

@@ -29,20 +41,136 @@ struct amba_device ux500_pl031_device = {
.irq = {IRQ_RTC_RTT, NO_IRQ},
};

+#ifdef CONFIG_STE_DMA40
+static struct stedma40_chan_cfg uart0_dma_cfg_rx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = STEDMA40_DEV_UART0_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg uart0_dma_cfg_tx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = STEDMA40_DEV_UART0_TX,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg uart1_dma_cfg_rx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = STEDMA40_DEV_UART1_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg uart1_dma_cfg_tx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = STEDMA40_DEV_UART1_TX,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg uart2_dma_cfg_rx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_PERIPH_TO_MEM,
+ .src_dev_type = STEDMA40_DEV_UART2_RX,
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+
+static struct stedma40_chan_cfg uart2_dma_cfg_tx = {
+ .channel_type = (STEDMA40_CHANNEL_IN_LOG_MODE|
+ STEDMA40_LCHAN_SRC_LOG_DST_LOG|STEDMA40_NO_TIM_FOR_LINK|
+ STEDMA40_LOW_PRIORITY_CHANNEL),
+ .dir = STEDMA40_MEM_TO_PERIPH,
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY,
+ .dst_dev_type = STEDMA40_DEV_UART2_TX,
+ .src_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .src_info.data_width = STEDMA40_BYTE_WIDTH,
+ .dst_info.endianess = STEDMA40_LITTLE_ENDIAN,
+ .dst_info.data_width = STEDMA40_BYTE_WIDTH,
+};
+#endif
+
+static struct amba_pl011_data uart0_plat = {
+#ifdef CONFIG_STE_DMA40
+ .dma_filter = stedma40_filter,
+ .dma_rx_param = &uart0_dma_cfg_rx,
+ .dma_tx_param = &uart0_dma_cfg_tx,
+#endif
+};
+
+static struct amba_pl011_data uart1_plat = {
+#ifdef CONFIG_STE_DMA40
+ .dma_filter = stedma40_filter,
+ .dma_rx_param = &uart1_dma_cfg_rx,
+ .dma_tx_param = &uart1_dma_cfg_tx,
+#endif
+};
+
+static struct amba_pl011_data uart2_plat = {
+#ifdef CONFIG_STE_DMA40
+ .dma_filter = stedma40_filter,
+ .dma_rx_param = &uart2_dma_cfg_rx,
+ .dma_tx_param = &uart2_dma_cfg_tx,
+#endif
+};
+
struct amba_device ux500_uart0_device = {
- .dev = { .init_name = "uart0" },
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "uart0",
+ .platform_data = &uart0_plat,
+ },
__MEM_4K_RESOURCE(UX500_UART0_BASE),
.irq = {IRQ_UART0, NO_IRQ},
};

struct amba_device ux500_uart1_device = {
- .dev = { .init_name = "uart1" },
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "uart1",
+ .platform_data = &uart1_plat,
+ },
__MEM_4K_RESOURCE(UX500_UART1_BASE),
.irq = {IRQ_UART1, NO_IRQ},
};

struct amba_device ux500_uart2_device = {
- .dev = { .init_name = "uart2" },
+ .dev = {
+ .coherent_dma_mask = ~0,
+ .init_name = "uart2",
+ .platform_data = &uart2_plat,
+ },
__MEM_4K_RESOURCE(UX500_UART2_BASE),
.irq = {IRQ_UART2, NO_IRQ},
};
--
1.6.3.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH 01/13] ARM: define the PrimeCell DMA API v6
Next: [PATCH 03/13] DMAENGINE: add generic PrimeCell interface to DMA40 v2