1/* linux/arch/arm/mach-s5pv210/dev-spi.c 2 * 3 * Copyright (C) 2010 Samsung Electronics Co. Ltd. 4 * Jaswinder Singh <jassi.brar@samsung.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/platform_device.h> 12#include <linux/dma-mapping.h> 13#include <linux/gpio.h> 14 15#include <mach/dma.h> 16#include <mach/map.h> 17#include <mach/irqs.h> 18#include <mach/spi-clocks.h> 19 20#include <plat/s3c64xx-spi.h> 21#include <plat/gpio-cfg.h> 22 23static char *spi_src_clks[] = { 24 [S5PV210_SPI_SRCCLK_PCLK] = "pclk", 25 [S5PV210_SPI_SRCCLK_SCLK] = "sclk_spi", 26}; 27 28/* SPI Controller platform_devices */ 29 30/* Since we emulate multi-cs capability, we do not touch the CS. 31 * The emulated CS is toggled by board specific mechanism, as it can 32 * be either some immediate GPIO or some signal out of some other 33 * chip in between ... or some yet another way. 34 * We simply do not assume anything about CS. 35 */ 36static int s5pv210_spi_cfg_gpio(struct platform_device *pdev) 37{ 38 switch (pdev->id) { 39 case 0: 40 s3c_gpio_cfgpin(S5PV210_GPB(0), S3C_GPIO_SFN(2)); 41 s3c_gpio_cfgpin(S5PV210_GPB(1), S3C_GPIO_SFN(2)); 42 s3c_gpio_cfgpin(S5PV210_GPB(2), S3C_GPIO_SFN(2)); 43 s3c_gpio_setpull(S5PV210_GPB(0), S3C_GPIO_PULL_UP); 44 s3c_gpio_setpull(S5PV210_GPB(1), S3C_GPIO_PULL_UP); 45 s3c_gpio_setpull(S5PV210_GPB(2), S3C_GPIO_PULL_UP); 46 break; 47 48 case 1: 49 s3c_gpio_cfgpin(S5PV210_GPB(4), S3C_GPIO_SFN(2)); 50 s3c_gpio_cfgpin(S5PV210_GPB(5), S3C_GPIO_SFN(2)); 51 s3c_gpio_cfgpin(S5PV210_GPB(6), S3C_GPIO_SFN(2)); 52 s3c_gpio_setpull(S5PV210_GPB(4), S3C_GPIO_PULL_UP); 53 s3c_gpio_setpull(S5PV210_GPB(5), S3C_GPIO_PULL_UP); 54 s3c_gpio_setpull(S5PV210_GPB(6), S3C_GPIO_PULL_UP); 55 break; 56 57 default: 58 dev_err(&pdev->dev, "Invalid SPI Controller number!"); 59 return -EINVAL; 60 } 61 62 return 0; 63} 64 65static struct resource s5pv210_spi0_resource[] = { 66 [0] = { 67 .start = S5PV210_PA_SPI0, 68 .end = S5PV210_PA_SPI0 + 0x100 - 1, 69 .flags = IORESOURCE_MEM, 70 }, 71 [1] = { 72 .start = DMACH_SPI0_TX, 73 .end = DMACH_SPI0_TX, 74 .flags = IORESOURCE_DMA, 75 }, 76 [2] = { 77 .start = DMACH_SPI0_RX, 78 .end = DMACH_SPI0_RX, 79 .flags = IORESOURCE_DMA, 80 }, 81 [3] = { 82 .start = IRQ_SPI0, 83 .end = IRQ_SPI0, 84 .flags = IORESOURCE_IRQ, 85 }, 86}; 87 88static struct s3c64xx_spi_info s5pv210_spi0_pdata = { 89 .cfg_gpio = s5pv210_spi_cfg_gpio, 90 .fifo_lvl_mask = 0x1ff, 91 .rx_lvl_offset = 15, 92 .high_speed = 1, 93}; 94 95static u64 spi_dmamask = DMA_BIT_MASK(32); 96 97struct platform_device s5pv210_device_spi0 = { 98 .name = "s3c64xx-spi", 99 .id = 0, 100 .num_resources = ARRAY_SIZE(s5pv210_spi0_resource), 101 .resource = s5pv210_spi0_resource, 102 .dev = { 103 .dma_mask = &spi_dmamask, 104 .coherent_dma_mask = DMA_BIT_MASK(32), 105 .platform_data = &s5pv210_spi0_pdata, 106 }, 107}; 108 109static struct resource s5pv210_spi1_resource[] = { 110 [0] = { 111 .start = S5PV210_PA_SPI1, 112 .end = S5PV210_PA_SPI1 + 0x100 - 1, 113 .flags = IORESOURCE_MEM, 114 }, 115 [1] = { 116 .start = DMACH_SPI1_TX, 117 .end = DMACH_SPI1_TX, 118 .flags = IORESOURCE_DMA, 119 }, 120 [2] = { 121 .start = DMACH_SPI1_RX, 122 .end = DMACH_SPI1_RX, 123 .flags = IORESOURCE_DMA, 124 }, 125 [3] = { 126 .start = IRQ_SPI1, 127 .end = IRQ_SPI1, 128 .flags = IORESOURCE_IRQ, 129 }, 130}; 131 132static struct s3c64xx_spi_info s5pv210_spi1_pdata = { 133 .cfg_gpio = s5pv210_spi_cfg_gpio, 134 .fifo_lvl_mask = 0x7f, 135 .rx_lvl_offset = 15, 136 .high_speed = 1, 137}; 138 139struct platform_device s5pv210_device_spi1 = { 140 .name = "s3c64xx-spi", 141 .id = 1, 142 .num_resources = ARRAY_SIZE(s5pv210_spi1_resource), 143 .resource = s5pv210_spi1_resource, 144 .dev = { 145 .dma_mask = &spi_dmamask, 146 .coherent_dma_mask = DMA_BIT_MASK(32), 147 .platform_data = &s5pv210_spi1_pdata, 148 }, 149}; 150 151void __init s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs) 152{ 153 struct s3c64xx_spi_info *pd; 154 155 /* Reject invalid configuration */ 156 if (!num_cs || src_clk_nr < 0 157 || src_clk_nr > S5PV210_SPI_SRCCLK_SCLK) { 158 printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__); 159 return; 160 } 161 162 switch (cntrlr) { 163 case 0: 164 pd = &s5pv210_spi0_pdata; 165 break; 166 case 1: 167 pd = &s5pv210_spi1_pdata; 168 break; 169 default: 170 printk(KERN_ERR "%s: Invalid SPI controller(%d)\n", 171 __func__, cntrlr); 172 return; 173 } 174 175 pd->num_cs = num_cs; 176 pd->src_clk_nr = src_clk_nr; 177 pd->src_clk_name = spi_src_clks[src_clk_nr]; 178} 179