[PATCH 1/4] mach-ux500: add platform data for musb
Linus Walleij
linus.walleij at stericsson.com
Tue Jan 25 10:25:20 EST 2011
From: Mian Yousaf Kaukab <mian.yousaf.kaukab at stericsson.com>
USB resources and DMA40 configurations are dynamically with
the data provided in ux500_add_usb() call. Though only DMA40
configurations differ between U8500 and U5500 (USB resource
are common between them).
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab at stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij at stericsson.com>
---
arch/arm/mach-ux500/Makefile | 2 +-
arch/arm/mach-ux500/include/mach/usb.h | 26 +++++
arch/arm/mach-ux500/usb.c | 165 ++++++++++++++++++++++++++++++++
3 files changed, 192 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-ux500/include/mach/usb.h
create mode 100644 arch/arm/mach-ux500/usb.c
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 1cb588e..eec3279 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -3,7 +3,7 @@
#
obj-y := clock.o cpu.o devices.o devices-common.o \
- id.o
+ id.o usb.o
obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o
obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o prcmu.o
obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \
diff --git a/arch/arm/mach-ux500/include/mach/usb.h b/arch/arm/mach-ux500/include/mach/usb.h
new file mode 100644
index 0000000..096ba2a
--- /dev/null
+++ b/arch/arm/mach-ux500/include/mach/usb.h
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2011 ST-Ericsson.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#ifndef __ASM_ARCH_USB_H
+#define __ASM_ARCH_USB_H
+
+#include <linux/dmaengine.h>
+
+#define UX500_MUSB_DMA_NUM_RX_CHANNELS 8
+#define UX500_MUSB_DMA_NUM_TX_CHANNELS 8
+
+struct ux500_musb_board_data {
+ void **dma_rx_param_array;
+ void **dma_tx_param_array;
+ u32 num_rx_channels;
+ u32 num_tx_channels;
+ bool (*dma_filter)(struct dma_chan *chan, void *filter_param);
+};
+
+void ux500_add_usb(resource_size_t base, int irq, int *dma_rx_cfg,
+ int *dma_tx_cfg);
+#endif
diff --git a/arch/arm/mach-ux500/usb.c b/arch/arm/mach-ux500/usb.c
new file mode 100644
index 0000000..c0da1fd
--- /dev/null
+++ b/arch/arm/mach-ux500/usb.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) ST-Ericsson AB 2011
+ *
+ * Author: Mian Yousaf Kaukab <mian.yousaf.kaukab at stericsson.com>
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/platform_device.h>
+#include <linux/usb/musb.h>
+#include <plat/ste_dma40.h>
+#include <mach/hardware.h>
+#include <mach/usb.h>
+
+#ifdef CONFIG_STE_DMA40
+#define MUSB_DMA40_RX_CH { \
+ .mode = STEDMA40_MODE_LOGICAL, \
+ .dir = STEDMA40_PERIPH_TO_MEM, \
+ .dst_dev_type = STEDMA40_DEV_DST_MEMORY, \
+ .src_info.data_width = STEDMA40_WORD_WIDTH, \
+ .dst_info.data_width = STEDMA40_WORD_WIDTH, \
+ .src_info.psize = STEDMA40_PSIZE_LOG_16, \
+ .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
+ }
+
+#define MUSB_DMA40_TX_CH { \
+ .mode = STEDMA40_MODE_LOGICAL, \
+ .dir = STEDMA40_MEM_TO_PERIPH, \
+ .src_dev_type = STEDMA40_DEV_SRC_MEMORY, \
+ .src_info.data_width = STEDMA40_WORD_WIDTH, \
+ .dst_info.data_width = STEDMA40_WORD_WIDTH, \
+ .src_info.psize = STEDMA40_PSIZE_LOG_16, \
+ .dst_info.psize = STEDMA40_PSIZE_LOG_16, \
+ }
+
+static struct stedma40_chan_cfg musb_dma_rx_ch[UX500_MUSB_DMA_NUM_RX_CHANNELS]
+ = {
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH,
+ MUSB_DMA40_RX_CH
+};
+
+static struct stedma40_chan_cfg musb_dma_tx_ch[UX500_MUSB_DMA_NUM_TX_CHANNELS]
+ = {
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+ MUSB_DMA40_TX_CH,
+};
+
+static void *ux500_dma_rx_param_array[UX500_MUSB_DMA_NUM_RX_CHANNELS] = {
+ &musb_dma_rx_ch[0],
+ &musb_dma_rx_ch[1],
+ &musb_dma_rx_ch[2],
+ &musb_dma_rx_ch[3],
+ &musb_dma_rx_ch[4],
+ &musb_dma_rx_ch[5],
+ &musb_dma_rx_ch[6],
+ &musb_dma_rx_ch[7]
+};
+
+static void *ux500_dma_tx_param_array[UX500_MUSB_DMA_NUM_TX_CHANNELS] = {
+ &musb_dma_tx_ch[0],
+ &musb_dma_tx_ch[1],
+ &musb_dma_tx_ch[2],
+ &musb_dma_tx_ch[3],
+ &musb_dma_tx_ch[4],
+ &musb_dma_tx_ch[5],
+ &musb_dma_tx_ch[6],
+ &musb_dma_tx_ch[7]
+};
+
+static struct ux500_musb_board_data musb_board_data = {
+ .dma_rx_param_array = ux500_dma_rx_param_array,
+ .dma_tx_param_array = ux500_dma_tx_param_array,
+ .num_rx_channels = UX500_MUSB_DMA_NUM_RX_CHANNELS,
+ .num_tx_channels = UX500_MUSB_DMA_NUM_TX_CHANNELS,
+ .dma_filter = stedma40_filter,
+};
+#endif
+
+static u64 ux500_musb_dmamask = DMA_BIT_MASK(32);
+
+static struct musb_hdrc_config musb_hdrc_config = {
+ .multipoint = true,
+ .dyn_fifo = true,
+ .num_eps = 16,
+ .ram_bits = 16,
+};
+
+static struct musb_hdrc_platform_data musb_platform_data = {
+#if defined(CONFIG_USB_MUSB_OTG)
+ .mode = MUSB_OTG,
+#elif defined(CONFIG_USB_MUSB_PERIPHERAL)
+ .mode = MUSB_PERIPHERAL,
+#else /* defined(CONFIG_USB_MUSB_HOST) */
+ .mode = MUSB_HOST,
+#endif
+ .config = &musb_hdrc_config,
+#ifdef CONFIG_STE_DMA40
+ .board_data = &musb_board_data,
+#endif /* CONFIG_STE_DMA40 */
+};
+
+static struct resource usb_resources[] = {
+ [0] = {
+ .name = "usb-mem",
+ .flags = IORESOURCE_MEM,
+ },
+
+ [1] = {
+ .name = "mc", /* hard-coded in musb */
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+struct platform_device ux500_musb_device = {
+ .name = "musb-ux500",
+ .id = 0,
+ .dev = {
+ .platform_data = &musb_platform_data,
+ .dma_mask = &ux500_musb_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ },
+ .num_resources = ARRAY_SIZE(usb_resources),
+ .resource = usb_resources,
+};
+
+static inline void ux500_usb_dma_update_rx_ch_config(int *src_dev_type)
+{
+ u32 idx;
+
+ for (idx = 0; idx < UX500_MUSB_DMA_NUM_RX_CHANNELS; idx++)
+ musb_dma_rx_ch[idx].src_dev_type = src_dev_type[idx];
+}
+
+static inline void ux500_usb_dma_update_tx_ch_config(int *dst_dev_type)
+{
+ u32 idx;
+
+ for (idx = 0; idx < UX500_MUSB_DMA_NUM_TX_CHANNELS; idx++)
+ musb_dma_tx_ch[idx].dst_dev_type = dst_dev_type[idx];
+}
+
+void ux500_add_usb(resource_size_t base, int irq, int *dma_rx_cfg,
+ int *dma_tx_cfg)
+{
+ ux500_musb_device.resource[0].start = base;
+ ux500_musb_device.resource[0].end = base + SZ_64K - 1;
+ ux500_musb_device.resource[1].start = irq;
+ ux500_musb_device.resource[1].end = irq;
+
+ ux500_usb_dma_update_rx_ch_config(dma_rx_cfg);
+ ux500_usb_dma_update_tx_ch_config(dma_tx_cfg);
+
+ platform_device_register(&ux500_musb_device);
+}
--
1.7.3.2
More information about the linux-arm-kernel
mailing list