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+/* linux/arch/arm/mach-s5p64x0/dev-spi.c
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+ *
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+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
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+ * http://www.samsung.com
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+ *
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+ * Copyright (C) 2010 Samsung Electronics Co. Ltd.
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+ * Jaswinder Singh <jassi.brar@samsung.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+*/
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+
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+#include <linux/platform_device.h>
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+#include <linux/dma-mapping.h>
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+#include <linux/gpio.h>
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+
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+#include <mach/dma.h>
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+#include <mach/map.h>
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+#include <mach/irqs.h>
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+#include <mach/regs-clock.h>
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+#include <mach/spi-clocks.h>
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+
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+#include <plat/s3c64xx-spi.h>
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+#include <plat/gpio-cfg.h>
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+
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+static char *s5p64x0_spi_src_clks[] = {
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+ [S5P64X0_SPI_SRCCLK_PCLK] = "pclk",
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+ [S5P64X0_SPI_SRCCLK_SCLK] = "sclk_spi",
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+};
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+
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+/* SPI Controller platform_devices */
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+
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+/* Since we emulate multi-cs capability, we do not touch the CS.
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+ * The emulated CS is toggled by board specific mechanism, as it can
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+ * be either some immediate GPIO or some signal out of some other
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+ * chip in between ... or some yet another way.
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+ * We simply do not assume anything about CS.
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+ */
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+static int s5p6440_spi_cfg_gpio(struct platform_device *pdev)
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+{
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+ switch (pdev->id) {
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+ case 0:
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+ s3c_gpio_cfgpin(S5P6440_GPC(0), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6440_GPC(1), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6440_GPC(2), S3C_GPIO_SFN(2));
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+ s3c_gpio_setpull(S5P6440_GPC(0), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6440_GPC(1), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6440_GPC(2), S3C_GPIO_PULL_UP);
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+ break;
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+
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+ case 1:
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+ s3c_gpio_cfgpin(S5P6440_GPC(4), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6440_GPC(5), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6440_GPC(6), S3C_GPIO_SFN(2));
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+ s3c_gpio_setpull(S5P6440_GPC(4), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6440_GPC(5), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6440_GPC(6), S3C_GPIO_PULL_UP);
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+ break;
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+
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+ default:
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+ dev_err(&pdev->dev, "Invalid SPI Controller number!");
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static int s5p6450_spi_cfg_gpio(struct platform_device *pdev)
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+{
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+ switch (pdev->id) {
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+ case 0:
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+ s3c_gpio_cfgpin(S5P6450_GPC(0), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6450_GPC(1), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6450_GPC(2), S3C_GPIO_SFN(2));
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+ s3c_gpio_setpull(S5P6450_GPC(0), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6450_GPC(1), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6450_GPC(2), S3C_GPIO_PULL_UP);
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+ break;
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+
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+ case 1:
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+ s3c_gpio_cfgpin(S5P6450_GPC(4), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6450_GPC(5), S3C_GPIO_SFN(2));
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+ s3c_gpio_cfgpin(S5P6450_GPC(6), S3C_GPIO_SFN(2));
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+ s3c_gpio_setpull(S5P6450_GPC(4), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6450_GPC(5), S3C_GPIO_PULL_UP);
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+ s3c_gpio_setpull(S5P6450_GPC(6), S3C_GPIO_PULL_UP);
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+ break;
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+
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+ default:
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+ dev_err(&pdev->dev, "Invalid SPI Controller number!");
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+ return -EINVAL;
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+ }
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+
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+ return 0;
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+}
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+
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+static struct resource s5p64x0_spi0_resource[] = {
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+ [0] = {
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+ .start = S5P64X0_PA_SPI0,
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+ .end = S5P64X0_PA_SPI0 + 0x100 - 1,
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+ .flags = IORESOURCE_MEM,
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+ },
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+ [1] = {
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+ .start = DMACH_SPI0_TX,
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+ .end = DMACH_SPI0_TX,
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+ .flags = IORESOURCE_DMA,
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+ },
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+ [2] = {
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+ .start = DMACH_SPI0_RX,
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+ .end = DMACH_SPI0_RX,
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+ .flags = IORESOURCE_DMA,
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+ },
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+ [3] = {
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+ .start = IRQ_SPI0,
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+ .end = IRQ_SPI0,
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+ .flags = IORESOURCE_IRQ,
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+ },
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+};
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+
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+static struct s3c64xx_spi_info s5p6440_spi0_pdata = {
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+ .cfg_gpio = s5p6440_spi_cfg_gpio,
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+ .fifo_lvl_mask = 0x1ff,
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+ .rx_lvl_offset = 15,
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+};
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+
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+static struct s3c64xx_spi_info s5p6450_spi0_pdata = {
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+ .cfg_gpio = s5p6450_spi_cfg_gpio,
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+ .fifo_lvl_mask = 0x1ff,
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+ .rx_lvl_offset = 15,
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+};
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+
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+static u64 spi_dmamask = DMA_BIT_MASK(32);
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+
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+struct platform_device s5p64x0_device_spi0 = {
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+ .name = "s3c64xx-spi",
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+ .id = 0,
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+ .num_resources = ARRAY_SIZE(s5p64x0_spi0_resource),
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+ .resource = s5p64x0_spi0_resource,
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+ .dev = {
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+ .dma_mask = &spi_dmamask,
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+ .coherent_dma_mask = DMA_BIT_MASK(32),
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+ },
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+};
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+
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+static struct resource s5p64x0_spi1_resource[] = {
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+ [0] = {
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+ .start = S5P64X0_PA_SPI1,
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+ .end = S5P64X0_PA_SPI1 + 0x100 - 1,
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+ .flags = IORESOURCE_MEM,
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+ },
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+ [1] = {
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+ .start = DMACH_SPI1_TX,
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+ .end = DMACH_SPI1_TX,
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+ .flags = IORESOURCE_DMA,
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+ },
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+ [2] = {
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+ .start = DMACH_SPI1_RX,
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+ .end = DMACH_SPI1_RX,
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+ .flags = IORESOURCE_DMA,
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+ },
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+ [3] = {
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+ .start = IRQ_SPI1,
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+ .end = IRQ_SPI1,
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+ .flags = IORESOURCE_IRQ,
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+ },
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+};
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+
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+static struct s3c64xx_spi_info s5p6440_spi1_pdata = {
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+ .cfg_gpio = s5p6440_spi_cfg_gpio,
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+ .fifo_lvl_mask = 0x7f,
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+ .rx_lvl_offset = 15,
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+};
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+
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+static struct s3c64xx_spi_info s5p6450_spi1_pdata = {
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+ .cfg_gpio = s5p6450_spi_cfg_gpio,
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+ .fifo_lvl_mask = 0x7f,
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+ .rx_lvl_offset = 15,
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+};
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+
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+struct platform_device s5p64x0_device_spi1 = {
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+ .name = "s3c64xx-spi",
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+ .id = 1,
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+ .num_resources = ARRAY_SIZE(s5p64x0_spi1_resource),
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+ .resource = s5p64x0_spi1_resource,
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+ .dev = {
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+ .dma_mask = &spi_dmamask,
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+ .coherent_dma_mask = DMA_BIT_MASK(32),
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+ },
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+};
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+
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+void __init s5p64x0_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
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+{
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+ unsigned int id;
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+ struct s3c64xx_spi_info *pd;
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+
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+ id = __raw_readl(S5P64X0_SYS_ID) & 0xFF000;
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+
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+ /* Reject invalid configuration */
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+ if (!num_cs || src_clk_nr < 0
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+ || src_clk_nr > S5P64X0_SPI_SRCCLK_SCLK) {
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+ printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
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+ return;
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+ }
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+
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+ switch (cntrlr) {
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+ case 0:
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+ if (id == 0x50000)
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+ pd = &s5p6450_spi0_pdata;
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+ else
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+ pd = &s5p6440_spi0_pdata;
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+
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+ s5p64x0_device_spi0.dev.platform_data = pd;
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+ break;
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+ case 1:
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+ if (id == 0x50000)
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+ pd = &s5p6450_spi1_pdata;
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+ else
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+ pd = &s5p6440_spi1_pdata;
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+
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+ s5p64x0_device_spi1.dev.platform_data = pd;
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+ break;
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+ default:
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+ printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
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+ __func__, cntrlr);
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+ return;
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+ }
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+
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+ pd->num_cs = num_cs;
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+ pd->src_clk_nr = src_clk_nr;
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+ pd->src_clk_name = s5p64x0_spi_src_clks[src_clk_nr];
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+}
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