1 files changed, 226 insertions, 0 deletions

diff --git a/arch/arm/mach-s5p64x0/dev-spi.c b/arch/arm/mach-s5p64x0/dev-spi.c
new file mode 100644
index 00000000000..ac825e82632
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/dev-spi.c
@@ -0,0 +1,226 @@
+/* linux/arch/arm/mach-s5p64x0/dev-spi.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ *              http://www.samsung.com
+ *
+ * Copyright (C) 2010 Samsung Electronics Co. Ltd.
+ *      Jaswinder Singh <jassi.brar@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 <linux/gpio.h>
+
+#include <mach/dma.h>
+#include <mach/map.h>
+#include <mach/irqs.h>
+#include <mach/regs-clock.h>
+#include <mach/spi-clocks.h>
+
+#include <plat/s3c64xx-spi.h>
+#include <plat/gpio-cfg.h>
+
+static char *s5p64x0_spi_src_clks[] = {
+        [S5P64X0_SPI_SRCCLK_PCLK] = "pclk",
+        [S5P64X0_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 s5p6440_spi_cfg_gpio(struct platform_device *pdev)
+{
+        unsigned int base;
+
+        switch (pdev->id) {
+        case 0:
+                base = S5P6440_GPC(0);
+                break;
+
+        case 1:
+                base = S5P6440_GPC(4);
+                break;
+
+        default:
+                dev_err(&pdev->dev, "Invalid SPI Controller number!");
+                return -EINVAL;
+        }
+
+        s3c_gpio_cfgall_range(base, 3,
+                              S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
+
+        return 0;
+}
+
+static int s5p6450_spi_cfg_gpio(struct platform_device *pdev)
+{
+        unsigned int base;
+
+        switch (pdev->id) {
+        case 0:
+                base = S5P6450_GPC(0);
+                break;
+
+        case 1:
+                base = S5P6450_GPC(4);
+                break;
+
+        default:
+                dev_err(&pdev->dev, "Invalid SPI Controller number!");
+                return -EINVAL;
+        }
+
+        s3c_gpio_cfgall_range(base, 3,
+                              S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
+
+        return 0;
+}
+
+static struct resource s5p64x0_spi0_resource[] = {
+        [0] = {
+                .start  = S5P64X0_PA_SPI0,
+                .end    = S5P64X0_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 s5p6440_spi0_pdata = {
+        .cfg_gpio       = s5p6440_spi_cfg_gpio,
+        .fifo_lvl_mask  = 0x1ff,
+        .rx_lvl_offset  = 15,
+        .tx_st_done     = 25,
+};
+
+static struct s3c64xx_spi_info s5p6450_spi0_pdata = {
+        .cfg_gpio       = s5p6450_spi_cfg_gpio,
+        .fifo_lvl_mask  = 0x1ff,
+        .rx_lvl_offset  = 15,
+        .tx_st_done     = 25,
+};
+
+static u64 spi_dmamask = DMA_BIT_MASK(32);
+
+struct platform_device s5p64x0_device_spi0 = {
+        .name           = "s3c64xx-spi",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(s5p64x0_spi0_resource),
+        .resource       = s5p64x0_spi0_resource,
+        .dev = {
+                .dma_mask               = &spi_dmamask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+};
+
+static struct resource s5p64x0_spi1_resource[] = {
+        [0] = {
+                .start  = S5P64X0_PA_SPI1,
+                .end    = S5P64X0_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 s5p6440_spi1_pdata = {
+        .cfg_gpio       = s5p6440_spi_cfg_gpio,
+        .fifo_lvl_mask  = 0x7f,
+        .rx_lvl_offset  = 15,
+        .tx_st_done     = 25,
+};
+
+static struct s3c64xx_spi_info s5p6450_spi1_pdata = {
+        .cfg_gpio       = s5p6450_spi_cfg_gpio,
+        .fifo_lvl_mask  = 0x7f,
+        .rx_lvl_offset  = 15,
+        .tx_st_done     = 25,
+};
+
+struct platform_device s5p64x0_device_spi1 = {
+        .name           = "s3c64xx-spi",
+        .id             = 1,
+        .num_resources  = ARRAY_SIZE(s5p64x0_spi1_resource),
+        .resource       = s5p64x0_spi1_resource,
+        .dev = {
+                .dma_mask               = &spi_dmamask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+};
+
+void __init s5p64x0_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
+{
+        unsigned int id;
+        struct s3c64xx_spi_info *pd;
+
+        id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
+
+        /* Reject invalid configuration */
+        if (!num_cs || src_clk_nr < 0
+                        || src_clk_nr > S5P64X0_SPI_SRCCLK_SCLK) {
+                printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
+                return;
+        }
+
+        switch (cntrlr) {
+        case 0:
+                if (id == 0x50000)
+                        pd = &s5p6450_spi0_pdata;
+                else
+                        pd = &s5p6440_spi0_pdata;
+
+                s5p64x0_device_spi0.dev.platform_data = pd;
+                break;
+        case 1:
+                if (id == 0x50000)
+                        pd = &s5p6450_spi1_pdata;
+                else
+                        pd = &s5p6440_spi1_pdata;
+
+                s5p64x0_device_spi1.dev.platform_data = pd;
+                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 = s5p64x0_spi_src_clks[src_clk_nr];
+}