1 /* linux/arch/arm/plat-s3c64xx/dev-spi.c
3 * Copyright (C) 2009 Samsung Electronics Ltd.
4 * Jaswinder Singh <jassi.brar@samsung.com>
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.
11 #include <linux/kernel.h>
12 #include <linux/string.h>
13 #include <linux/export.h>
14 #include <linux/platform_device.h>
15 #include <linux/dma-mapping.h>
16 #include <linux/gpio.h>
20 #include <mach/spi-clocks.h>
21 #include <mach/irqs.h>
23 #include <plat/s3c64xx-spi.h>
24 #include <plat/gpio-cfg.h>
25 #include <plat/devs.h>
27 /* SPI Controller platform_devices */
29 /* Since we emulate multi-cs capability, we do not touch the GPC-3,7.
30 * The emulated CS is toggled by board specific mechanism, as it can
31 * be either some immediate GPIO or some signal out of some other
32 * chip in between ... or some yet another way.
33 * We simply do not assume anything about CS.
35 static int s3c64xx_spi_cfg_gpio(struct platform_device *pdev)
41 base = S3C64XX_GPC(0);
45 base = S3C64XX_GPC(4);
49 dev_err(&pdev->dev, "Invalid SPI Controller number!");
53 s3c_gpio_cfgall_range(base, 3,
54 S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
59 static struct resource s3c64xx_spi0_resource[] = {
61 .start = S3C64XX_PA_SPI0,
62 .end = S3C64XX_PA_SPI0 + 0x100 - 1,
63 .flags = IORESOURCE_MEM,
66 .start = DMACH_SPI0_TX,
68 .flags = IORESOURCE_DMA,
71 .start = DMACH_SPI0_RX,
73 .flags = IORESOURCE_DMA,
78 .flags = IORESOURCE_IRQ,
82 static struct s3c64xx_spi_info s3c64xx_spi0_pdata = {
83 .cfg_gpio = s3c64xx_spi_cfg_gpio,
84 .fifo_lvl_mask = 0x7f,
89 static u64 spi_dmamask = DMA_BIT_MASK(32);
91 struct platform_device s3c64xx_device_spi0 = {
92 .name = "s3c64xx-spi",
94 .num_resources = ARRAY_SIZE(s3c64xx_spi0_resource),
95 .resource = s3c64xx_spi0_resource,
97 .dma_mask = &spi_dmamask,
98 .coherent_dma_mask = DMA_BIT_MASK(32),
99 .platform_data = &s3c64xx_spi0_pdata,
102 EXPORT_SYMBOL(s3c64xx_device_spi0);
104 static struct resource s3c64xx_spi1_resource[] = {
106 .start = S3C64XX_PA_SPI1,
107 .end = S3C64XX_PA_SPI1 + 0x100 - 1,
108 .flags = IORESOURCE_MEM,
111 .start = DMACH_SPI1_TX,
112 .end = DMACH_SPI1_TX,
113 .flags = IORESOURCE_DMA,
116 .start = DMACH_SPI1_RX,
117 .end = DMACH_SPI1_RX,
118 .flags = IORESOURCE_DMA,
123 .flags = IORESOURCE_IRQ,
127 static struct s3c64xx_spi_info s3c64xx_spi1_pdata = {
128 .cfg_gpio = s3c64xx_spi_cfg_gpio,
129 .fifo_lvl_mask = 0x7f,
134 struct platform_device s3c64xx_device_spi1 = {
135 .name = "s3c64xx-spi",
137 .num_resources = ARRAY_SIZE(s3c64xx_spi1_resource),
138 .resource = s3c64xx_spi1_resource,
140 .dma_mask = &spi_dmamask,
141 .coherent_dma_mask = DMA_BIT_MASK(32),
142 .platform_data = &s3c64xx_spi1_pdata,
145 EXPORT_SYMBOL(s3c64xx_device_spi1);
147 void __init s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
149 struct s3c64xx_spi_info *pd;
151 /* Reject invalid configuration */
152 if (!num_cs || src_clk_nr < 0
153 || src_clk_nr > S3C64XX_SPI_SRCCLK_48M) {
154 printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
160 pd = &s3c64xx_spi0_pdata;
163 pd = &s3c64xx_spi1_pdata;
166 printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
172 pd->src_clk_nr = src_clk_nr;