From 7c3943f6d3625a2823262842e18387c4079a3f84 Mon Sep 17 00:00:00 2001 From: Jassi Brar Date: Tue, 18 May 2010 16:43:34 +0900 Subject: ARM: S5PC100: Define SPI platform devices Define SPI platform devices for the SoC. Signed-off-by: Jassi Brar Signed-off-by: Ben Dooks --- arch/arm/mach-s5pc100/dev-spi.c | 233 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 233 insertions(+) create mode 100644 arch/arm/mach-s5pc100/dev-spi.c (limited to 'arch/arm/mach-s5pc100/dev-spi.c') diff --git a/arch/arm/mach-s5pc100/dev-spi.c b/arch/arm/mach-s5pc100/dev-spi.c new file mode 100644 index 000000000000..14618c346057 --- /dev/null +++ b/arch/arm/mach-s5pc100/dev-spi.c @@ -0,0 +1,233 @@ +/* linux/arch/arm/mach-s5pc100/dev-spi.c + * + * Copyright (C) 2010 Samsung Electronics Co. Ltd. + * Jaswinder Singh + * + * 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 +#include + +#include +#include +#include +#include + +#include +#include +#include + +static char *spi_src_clks[] = { + [S5PC100_SPI_SRCCLK_PCLK] = "pclk", + [S5PC100_SPI_SRCCLK_48M] = "spi_48m", + [S5PC100_SPI_SRCCLK_SPIBUS] = "spi_bus", +}; + +/* 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 s5pc100_spi_cfg_gpio(struct platform_device *pdev) +{ + switch (pdev->id) { + case 0: + s3c_gpio_cfgpin(S5PC100_GPB(0), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PC100_GPB(1), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PC100_GPB(2), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPB(0), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPB(1), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPB(2), S3C_GPIO_PULL_UP); + break; + + case 1: + s3c_gpio_cfgpin(S5PC100_GPB(4), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PC100_GPB(5), S3C_GPIO_SFN(2)); + s3c_gpio_cfgpin(S5PC100_GPB(6), S3C_GPIO_SFN(2)); + s3c_gpio_setpull(S5PC100_GPB(4), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPB(5), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPB(6), S3C_GPIO_PULL_UP); + break; + + case 2: + s3c_gpio_cfgpin(S5PC100_GPG3(0), S3C_GPIO_SFN(3)); + s3c_gpio_cfgpin(S5PC100_GPG3(2), S3C_GPIO_SFN(3)); + s3c_gpio_cfgpin(S5PC100_GPG3(3), S3C_GPIO_SFN(3)); + s3c_gpio_setpull(S5PC100_GPG3(0), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPG3(2), S3C_GPIO_PULL_UP); + s3c_gpio_setpull(S5PC100_GPG3(3), S3C_GPIO_PULL_UP); + break; + + default: + dev_err(&pdev->dev, "Invalid SPI Controller number!"); + return -EINVAL; + } + + return 0; +} + +static struct resource s5pc100_spi0_resource[] = { + [0] = { + .start = S5PC100_PA_SPI0, + .end = S5PC100_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 s5pc100_spi0_pdata = { + .cfg_gpio = s5pc100_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 13, + .high_speed = 1, +}; + +static u64 spi_dmamask = DMA_BIT_MASK(32); + +struct platform_device s5pc100_device_spi0 = { + .name = "s3c64xx-spi", + .id = 0, + .num_resources = ARRAY_SIZE(s5pc100_spi0_resource), + .resource = s5pc100_spi0_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s5pc100_spi0_pdata, + }, +}; + +static struct resource s5pc100_spi1_resource[] = { + [0] = { + .start = S5PC100_PA_SPI1, + .end = S5PC100_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 s5pc100_spi1_pdata = { + .cfg_gpio = s5pc100_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 13, + .high_speed = 1, +}; + +struct platform_device s5pc100_device_spi1 = { + .name = "s3c64xx-spi", + .id = 1, + .num_resources = ARRAY_SIZE(s5pc100_spi1_resource), + .resource = s5pc100_spi1_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s5pc100_spi1_pdata, + }, +}; + +static struct resource s5pc100_spi2_resource[] = { + [0] = { + .start = S5PC100_PA_SPI2, + .end = S5PC100_PA_SPI2 + 0x100 - 1, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = DMACH_SPI2_TX, + .end = DMACH_SPI2_TX, + .flags = IORESOURCE_DMA, + }, + [2] = { + .start = DMACH_SPI2_RX, + .end = DMACH_SPI2_RX, + .flags = IORESOURCE_DMA, + }, + [3] = { + .start = IRQ_SPI2, + .end = IRQ_SPI2, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct s3c64xx_spi_info s5pc100_spi2_pdata = { + .cfg_gpio = s5pc100_spi_cfg_gpio, + .fifo_lvl_mask = 0x7f, + .rx_lvl_offset = 13, + .high_speed = 1, +}; + +struct platform_device s5pc100_device_spi2 = { + .name = "s3c64xx-spi", + .id = 2, + .num_resources = ARRAY_SIZE(s5pc100_spi2_resource), + .resource = s5pc100_spi2_resource, + .dev = { + .dma_mask = &spi_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + .platform_data = &s5pc100_spi2_pdata, + }, +}; + +void __init s5pc100_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 > S5PC100_SPI_SRCCLK_SPIBUS) { + printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__); + return; + } + + switch (cntrlr) { + case 0: + pd = &s5pc100_spi0_pdata; + break; + case 1: + pd = &s5pc100_spi1_pdata; + break; + case 2: + pd = &s5pc100_spi2_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]; +} -- cgit v1.2.1