[PATCH 4/4] ARM: S5P6442: Define SPI platform devices
Jassi Brar
jassi.brar at samsung.com
Tue May 18 03:43:45 EDT 2010
Define SPI platform devices for the SoC.
Signed-off-by: Jassi Brar <jassi.brar at samsung.com>
---
arch/arm/mach-s5p6442/Makefile | 1 +
arch/arm/mach-s5p6442/dev-spi.c | 123 ++++++++++++++++++++++
arch/arm/mach-s5p6442/include/mach/map.h | 2 +
arch/arm/mach-s5p6442/include/mach/spi-clocks.h | 17 +++
arch/arm/plat-samsung/include/plat/devs.h | 1 +
arch/arm/plat-samsung/include/plat/s3c64xx-spi.h | 1 +
6 files changed, 145 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5p6442/dev-spi.c
create mode 100644 arch/arm/mach-s5p6442/include/mach/spi-clocks.h
diff --git a/arch/arm/mach-s5p6442/Makefile b/arch/arm/mach-s5p6442/Makefile
index bf30550..1cd2cd6 100644
--- a/arch/arm/mach-s5p6442/Makefile
+++ b/arch/arm/mach-s5p6442/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_MACH_SMDK6442) += mach-smdk6442.o
# device support
obj-y += dev-audio.o
+obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o
diff --git a/arch/arm/mach-s5p6442/dev-spi.c b/arch/arm/mach-s5p6442/dev-spi.c
new file mode 100644
index 0000000..3019952
--- /dev/null
+++ b/arch/arm/mach-s5p6442/dev-spi.c
@@ -0,0 +1,123 @@
+/* linux/arch/arm/mach-s5p6442/dev-spi.c
+ *
+ * Copyright (C) 2010 Samsung Electronics Co. Ltd.
+ * Jaswinder Singh <jassi.brar at samsung.com>
+ *
+ * This program 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/platform_device.h>
+#include <linux/dma-mapping.h>
+
+#include <mach/dma.h>
+#include <mach/map.h>
+#include <mach/irqs.h>
+#include <mach/gpio.h>
+#include <mach/spi-clocks.h>
+
+#include <plat/s3c64xx-spi.h>
+#include <plat/gpio-cfg.h>
+
+static char *spi_src_clks[] = {
+ [S5P6442_SPI_SRCCLK_PCLK] = "pclk",
+ [S5P6442_SPI_SRCCLK_SCLK] = "spi_epll",
+};
+
+/* SPI Controller platform_devices */
+
+/* Since we emulate multi-cs capability, we do not touch the CS.
+ * The emulated CS is toggled by board specific mechanism, as it can
+ * be either some immediate GPIO or some signal out of some other
+ * chip in between ... or some yet another way.
+ * We simply do not assume anything about CS.
+ */
+static int s5p6442_spi_cfg_gpio(struct platform_device *pdev)
+{
+ switch (pdev->id) {
+ case 0:
+ s3c_gpio_cfgpin(S5P6442_GPB(0), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5P6442_GPB(2), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5P6442_GPB(3), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5P6442_GPB(0), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5P6442_GPB(2), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5P6442_GPB(3), S3C_GPIO_PULL_UP);
+ break;
+
+ default:
+ dev_err(&pdev->dev, "Invalid SPI Controller number!");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct resource s5p6442_spi0_resource[] = {
+ [0] = {
+ .start = S5P6442_PA_SPI,
+ .end = S5P6442_PA_SPI + 0x100 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = DMACH_SPI0_TX,
+ .end = DMACH_SPI0_TX,
+ .flags = IORESOURCE_DMA,
+ },
+ [2] = {
+ .start = DMACH_SPI0_RX,
+ .end = DMACH_SPI0_RX,
+ .flags = IORESOURCE_DMA,
+ },
+ [3] = {
+ .start = IRQ_SPI0,
+ .end = IRQ_SPI0,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct s3c64xx_spi_info s5p6442_spi0_pdata = {
+ .cfg_gpio = s5p6442_spi_cfg_gpio,
+ .fifo_lvl_mask = 0x1ff,
+ .rx_lvl_offset = 15,
+};
+
+static u64 spi_dmamask = DMA_BIT_MASK(32);
+
+struct platform_device s5p6442_device_spi = {
+ .name = "s3c64xx-spi",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(s5p6442_spi0_resource),
+ .resource = s5p6442_spi0_resource,
+ .dev = {
+ .dma_mask = &spi_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &s5p6442_spi0_pdata,
+ },
+};
+
+void __init s5p6442_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
+{
+ struct s3c64xx_spi_info *pd;
+
+ /* Reject invalid configuration */
+ if (!num_cs || src_clk_nr < 0
+ || src_clk_nr > S5P6442_SPI_SRCCLK_SCLK) {
+ printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
+ return;
+ }
+
+ switch (cntrlr) {
+ case 0:
+ pd = &s5p6442_spi0_pdata;
+ break;
+ default:
+ printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
+ __func__, cntrlr);
+ return;
+ }
+
+ pd->num_cs = num_cs;
+ pd->src_clk_nr = src_clk_nr;
+ pd->src_clk_name = spi_src_clks[src_clk_nr];
+}
diff --git a/arch/arm/mach-s5p6442/include/mach/map.h b/arch/arm/mach-s5p6442/include/mach/map.h
index 7568dc0..32ca424 100644
--- a/arch/arm/mach-s5p6442/include/mach/map.h
+++ b/arch/arm/mach-s5p6442/include/mach/map.h
@@ -54,6 +54,8 @@
#define S5P6442_PA_SDRAM (0x20000000)
#define S5P_PA_SDRAM S5P6442_PA_SDRAM
+#define S5P6442_PA_SPI 0xEC300000
+
/* I2S */
#define S5P6442_PA_I2S0 0xC0B00000
#define S5P6442_PA_I2S1 0xF2200000
diff --git a/arch/arm/mach-s5p6442/include/mach/spi-clocks.h b/arch/arm/mach-s5p6442/include/mach/spi-clocks.h
new file mode 100644
index 0000000..7fd8820
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/spi-clocks.h
@@ -0,0 +1,17 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/spi-clocks.h
+ *
+ * Copyright (C) 2010 Samsung Electronics Co. Ltd.
+ * Jaswinder Singh <jassi.brar at samsung.com>
+ *
+ * This program 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.
+ */
+
+#ifndef __S5P6442_PLAT_SPI_CLKS_H
+#define __S5P6442_PLAT_SPI_CLKS_H __FILE__
+
+#define S5P6442_SPI_SRCCLK_PCLK 0
+#define S5P6442_SPI_SRCCLK_SCLK 1
+
+#endif /* __S5P6442_PLAT_SPI_CLKS_H */
diff --git a/arch/arm/plat-samsung/include/plat/devs.h b/arch/arm/plat-samsung/include/plat/devs.h
index 01bd80e..c6975e5 100644
--- a/arch/arm/plat-samsung/include/plat/devs.h
+++ b/arch/arm/plat-samsung/include/plat/devs.h
@@ -64,6 +64,7 @@ extern struct platform_device s5pv210_device_spi0;
extern struct platform_device s5pv210_device_spi1;
extern struct platform_device s5p6440_device_spi0;
extern struct platform_device s5p6440_device_spi1;
+extern struct platform_device s5p6442_device_spi;
extern struct platform_device s3c_device_hwmon;
diff --git a/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h b/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
index 043e9f6..e5aba8f 100644
--- a/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
+++ b/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
@@ -66,5 +66,6 @@ extern void s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5pc100_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5p6440_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
+extern void s5p6442_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
#endif /* __S3C64XX_PLAT_SPI_H */
--
1.6.2.5
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