[PATCH 2/4] ARM: S5PV210: Define SPI platform devices
Jassi Brar
jassi.brar at samsung.com
Tue May 18 03:43:37 EDT 2010
Define SPI platform devices for the SoC.
Signed-off-by: Jassi Brar <jassi.brar at samsung.com>
---
arch/arm/mach-s5pv210/Makefile | 1 +
arch/arm/mach-s5pv210/dev-spi.c | 178 ++++++++++++++++++++++
arch/arm/mach-s5pv210/include/mach/map.h | 4 +
arch/arm/mach-s5pv210/include/mach/spi-clocks.h | 17 ++
arch/arm/plat-samsung/include/plat/devs.h | 2 +
arch/arm/plat-samsung/include/plat/s3c64xx-spi.h | 1 +
6 files changed, 203 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5pv210/dev-spi.c
create mode 100644 arch/arm/mach-s5pv210/include/mach/spi-clocks.h
diff --git a/arch/arm/mach-s5pv210/Makefile b/arch/arm/mach-s5pv210/Makefile
index 6ecfa9d..4ed901b 100644
--- a/arch/arm/mach-s5pv210/Makefile
+++ b/arch/arm/mach-s5pv210/Makefile
@@ -22,3 +22,4 @@ obj-$(CONFIG_MACH_SMDKC110) += mach-smdkc110.o
# device support
obj-y += dev-audio.o
+obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o
diff --git a/arch/arm/mach-s5pv210/dev-spi.c b/arch/arm/mach-s5pv210/dev-spi.c
new file mode 100644
index 0000000..337a62b
--- /dev/null
+++ b/arch/arm/mach-s5pv210/dev-spi.c
@@ -0,0 +1,178 @@
+/* linux/arch/arm/mach-s5pv210/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[] = {
+ [S5PV210_SPI_SRCCLK_PCLK] = "pclk",
+ [S5PV210_SPI_SRCCLK_SCLK] = "sclk_spi",
+};
+
+/* 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 s5pv210_spi_cfg_gpio(struct platform_device *pdev)
+{
+ switch (pdev->id) {
+ case 0:
+ s3c_gpio_cfgpin(S5PV210_GPB(0), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5PV210_GPB(1), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5PV210_GPB(2), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV210_GPB(0), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5PV210_GPB(1), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5PV210_GPB(2), S3C_GPIO_PULL_UP);
+ break;
+
+ case 1:
+ s3c_gpio_cfgpin(S5PV210_GPB(4), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5PV210_GPB(5), S3C_GPIO_SFN(2));
+ s3c_gpio_cfgpin(S5PV210_GPB(6), S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(S5PV210_GPB(4), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5PV210_GPB(5), S3C_GPIO_PULL_UP);
+ s3c_gpio_setpull(S5PV210_GPB(6), S3C_GPIO_PULL_UP);
+ break;
+
+ default:
+ dev_err(&pdev->dev, "Invalid SPI Controller number!");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct resource s5pv210_spi0_resource[] = {
+ [0] = {
+ .start = S5PV210_PA_SPI0,
+ .end = S5PV210_PA_SPI0 + 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 s5pv210_spi0_pdata = {
+ .cfg_gpio = s5pv210_spi_cfg_gpio,
+ .fifo_lvl_mask = 0x1ff,
+ .rx_lvl_offset = 15,
+ .high_speed = 1,
+};
+
+static u64 spi_dmamask = DMA_BIT_MASK(32);
+
+struct platform_device s5pv210_device_spi0 = {
+ .name = "s3c64xx-spi",
+ .id = 0,
+ .num_resources = ARRAY_SIZE(s5pv210_spi0_resource),
+ .resource = s5pv210_spi0_resource,
+ .dev = {
+ .dma_mask = &spi_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &s5pv210_spi0_pdata,
+ },
+};
+
+static struct resource s5pv210_spi1_resource[] = {
+ [0] = {
+ .start = S5PV210_PA_SPI1,
+ .end = S5PV210_PA_SPI1 + 0x100 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = DMACH_SPI1_TX,
+ .end = DMACH_SPI1_TX,
+ .flags = IORESOURCE_DMA,
+ },
+ [2] = {
+ .start = DMACH_SPI1_RX,
+ .end = DMACH_SPI1_RX,
+ .flags = IORESOURCE_DMA,
+ },
+ [3] = {
+ .start = IRQ_SPI1,
+ .end = IRQ_SPI1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct s3c64xx_spi_info s5pv210_spi1_pdata = {
+ .cfg_gpio = s5pv210_spi_cfg_gpio,
+ .fifo_lvl_mask = 0x7f,
+ .rx_lvl_offset = 15,
+ .high_speed = 1,
+};
+
+struct platform_device s5pv210_device_spi1 = {
+ .name = "s3c64xx-spi",
+ .id = 1,
+ .num_resources = ARRAY_SIZE(s5pv210_spi1_resource),
+ .resource = s5pv210_spi1_resource,
+ .dev = {
+ .dma_mask = &spi_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &s5pv210_spi1_pdata,
+ },
+};
+
+void __init s5pv210_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 > S5PV210_SPI_SRCCLK_SCLK) {
+ printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
+ return;
+ }
+
+ switch (cntrlr) {
+ case 0:
+ pd = &s5pv210_spi0_pdata;
+ break;
+ case 1:
+ pd = &s5pv210_spi1_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-s5pv210/include/mach/map.h b/arch/arm/mach-s5pv210/include/mach/map.h
index 5adcb9f..9ab0069 100644
--- a/arch/arm/mach-s5pv210/include/mach/map.h
+++ b/arch/arm/mach-s5pv210/include/mach/map.h
@@ -25,6 +25,10 @@
#define S5PV210_PA_GPIO (0xE0200000)
#define S5P_PA_GPIO S5PV210_PA_GPIO
+/* SPI */
+#define S5PV210_PA_SPI0 0xE1300000
+#define S5PV210_PA_SPI1 0xE1400000
+
#define S5PV210_PA_IIC0 (0xE1800000)
#define S5PV210_PA_TIMER (0xE2500000)
diff --git a/arch/arm/mach-s5pv210/include/mach/spi-clocks.h b/arch/arm/mach-s5pv210/include/mach/spi-clocks.h
new file mode 100644
index 0000000..02acded
--- /dev/null
+++ b/arch/arm/mach-s5pv210/include/mach/spi-clocks.h
@@ -0,0 +1,17 @@
+/* linux/arch/arm/mach-s5pv210/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 __S5PV210_PLAT_SPI_CLKS_H
+#define __S5PV210_PLAT_SPI_CLKS_H __FILE__
+
+#define S5PV210_SPI_SRCCLK_PCLK 0
+#define S5PV210_SPI_SRCCLK_SCLK 1
+
+#endif /* __S5PV210_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 f5a0c4a..0759c50 100644
--- a/arch/arm/plat-samsung/include/plat/devs.h
+++ b/arch/arm/plat-samsung/include/plat/devs.h
@@ -60,6 +60,8 @@ extern struct platform_device s3c_device_spi1;
extern struct platform_device s5pc100_device_spi0;
extern struct platform_device s5pc100_device_spi1;
extern struct platform_device s5pc100_device_spi2;
+extern struct platform_device s5pv210_device_spi0;
+extern struct platform_device s5pv210_device_spi1;
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 49ba71f..fdb40c3 100644
--- a/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
+++ b/arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
@@ -64,5 +64,6 @@ struct s3c64xx_spi_info {
*/
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);
#endif /* __S3C64XX_PLAT_SPI_H */
--
1.6.2.5
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