mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-21 11:27:43 +02:00
118 lines
2.9 KiB
Diff
118 lines
2.9 KiB
Diff
|
--- /dev/null
|
||
|
|
+++ b/arch/arm/mach-cns21xx/dev-spi-master.c
|
||
|
|
@@ -0,0 +1,83 @@
|
||
|
|
+/*
|
||
|
|
+ * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
|
||
|
|
+ *
|
||
|
|
+ * This file is free software; you can redistribute it and/or modify
|
||
|
|
+ * it under the terms of the GNU General Public License, Version 2, as
|
||
|
|
+ * published by the Free Software Foundation.
|
||
|
|
+ */
|
||
|
|
+
|
||
|
|
+#include <linux/kernel.h>
|
||
|
|
+#include <linux/init.h>
|
||
|
|
+#include <linux/spi/spi.h>
|
||
|
|
+#include <linux/dma-mapping.h>
|
||
|
|
+#include <linux/platform_device.h>
|
||
|
|
+
|
||
|
|
+#include <mach/hardware.h>
|
||
|
|
+#include <mach/cns21xx.h>
|
||
|
|
+#include <mach/cns21xx_misc.h>
|
||
|
|
+#include <mach/cns21xx_powermgmt.h>
|
||
|
|
+#include <mach/irqs.h>
|
||
|
|
+
|
||
|
|
+#include "common.h"
|
||
|
|
+
|
||
|
|
+static u64 spi_dmamask = DMA_BIT_MASK(32);
|
||
|
|
+static struct resource cns21xx_spi_resources[] = {
|
||
|
|
+ [0] = {
|
||
|
|
+ .start = CNS21XX_SPI_BASE,
|
||
|
|
+ .end = CNS21XX_SPI_BASE + SZ_4K - 1,
|
||
|
|
+ .flags = IORESOURCE_MEM,
|
||
|
|
+ },
|
||
|
|
+ [1] = {
|
||
|
|
+ .start = CNS21XX_IRQ_SPI,
|
||
|
|
+ .end = CNS21XX_IRQ_SPI,
|
||
|
|
+ .flags = IORESOURCE_IRQ,
|
||
|
|
+ },
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
+static struct platform_device cns21xx_spi_master_device = {
|
||
|
|
+ .name = "cns21xx-spi",
|
||
|
|
+ .id = -1,
|
||
|
|
+ .dev = {
|
||
|
|
+ .dma_mask = &spi_dmamask,
|
||
|
|
+ .coherent_dma_mask = DMA_BIT_MASK(32),
|
||
|
|
+ },
|
||
|
|
+ .resource = cns21xx_spi_resources,
|
||
|
|
+ .num_resources = ARRAY_SIZE(cns21xx_spi_resources),
|
||
|
|
+};
|
||
|
|
+
|
||
|
|
+void __init cns21xx_register_spi_master(int id, struct spi_board_info *info,
|
||
|
|
+ unsigned int n)
|
||
|
|
+{
|
||
|
|
+ unsigned int i;
|
||
|
|
+
|
||
|
|
+ /* Enable SPI pins */
|
||
|
|
+ HAL_MISC_ENABLE_SPIDR_PINS();
|
||
|
|
+ HAL_MISC_ENABLE_SPICLK_PINS();
|
||
|
|
+ for (i = 0; i < n; i++) {
|
||
|
|
+ switch (info[i].chip_select) {
|
||
|
|
+ case 0:
|
||
|
|
+ HAL_MISC_ENABLE_SPICSN0_PINS();
|
||
|
|
+ break;
|
||
|
|
+ case 1:
|
||
|
|
+ HAL_MISC_ENABLE_SPICSN1_PINS();
|
||
|
|
+ break;
|
||
|
|
+ case 2:
|
||
|
|
+ HAL_MISC_ENABLE_SPICSN2_PINS();
|
||
|
|
+ break;
|
||
|
|
+ case 3:
|
||
|
|
+ HAL_MISC_ENABLE_SPICSN3_PINS();
|
||
|
|
+ break;
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ /* Disable SPI serial flash access through 0x30000000 region */
|
||
|
|
+ HAL_MISC_DISABLE_SPI_SERIAL_FLASH_BANK_ACCESS();
|
||
|
|
+
|
||
|
|
+ /* Enable SPI clock */
|
||
|
|
+ HAL_PWRMGT_ENABLE_SPI_CLOCK();
|
||
|
|
+
|
||
|
|
+ cns21xx_spi_master_device.id = id;
|
||
|
|
+
|
||
|
|
+ spi_register_board_info(info, n);
|
||
|
|
+ platform_device_register(&cns21xx_spi_master_device);
|
||
|
|
+}
|
||
|
|
--- a/arch/arm/mach-cns21xx/Kconfig
|
||
|
|
+++ b/arch/arm/mach-cns21xx/Kconfig
|
||
|
|
@@ -6,4 +6,7 @@ endmenu
|
||
|
|
config CNS21XX_DEV_USB
|
||
|
|
def_bool n
|
||
|
|
|
||
|
|
+config CNS21XX_DEV_SPI_MASTER
|
||
|
|
+ def_bool n
|
||
|
|
+
|
||
|
|
endif
|
||
|
|
--- a/arch/arm/mach-cns21xx/Makefile
|
||
|
|
+++ b/arch/arm/mach-cns21xx/Makefile
|
||
|
|
@@ -8,6 +8,7 @@ obj-y := core.o devices.o gpio.o irq.o
|
||
|
|
|
||
|
|
# devices
|
||
|
|
obj-$(CONFIG_CNS21XX_DEV_USB) += dev-usb.o
|
||
|
|
+obj-$(CONFIG_CNS21XX_DEV_SPI_MASTER) += dev-spi-master.o
|
||
|
|
|
||
|
|
# machine specific files
|
||
|
|
|
||
|
|
--- a/arch/arm/mach-cns21xx/common.h
|
||
|
|
+++ b/arch/arm/mach-cns21xx/common.h
|
||
|
|
@@ -21,4 +21,8 @@ int __init cns21xx_register_uart1(void);
|
||
|
|
int __init cns21xx_register_usb(void);
|
||
|
|
int __init cns21xx_register_wdt(void);
|
||
|
|
|
||
|
|
+struct spi_board_info;
|
||
|
|
+void __init cns21xx_register_spi_master(int id, struct spi_board_info *info,
|
||
|
|
+ unsigned int n);
|
||
|
|
+
|
||
|
|
#endif /* _MACH_CNS21XX_COMMON_H */
|