1 /* linux/arch/arm/mach-s5pv210/dev-spi.c
3 * Copyright (C) 2010 Samsung Electronics Co. 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/platform_device.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/gpio.h>
17 #include <mach/irqs.h>
18 #include <mach/spi-clocks.h>
20 #include <plat/s3c64xx-spi.h>
21 #include <plat/gpio-cfg.h>
23 static char *spi_src_clks[] = {
24 [S5PV210_SPI_SRCCLK_PCLK] = "pclk",
25 [S5PV210_SPI_SRCCLK_SCLK] = "sclk_spi",
28 /* SPI Controller platform_devices */
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.
36 static int s5pv210_spi_cfg_gpio(struct platform_device *pdev)
42 base = S5PV210_GPB(0);
46 base = S5PV210_GPB(4);
50 dev_err(&pdev->dev, "Invalid SPI Controller number!");
54 s3c_gpio_cfgall_range(base, 3,
55 S3C_GPIO_SFN(2), S3C_GPIO_PULL_UP);
60 static struct resource s5pv210_spi0_resource[] = {
62 .start = S5PV210_PA_SPI0,
63 .end = S5PV210_PA_SPI0 + 0x100 - 1,
64 .flags = IORESOURCE_MEM,
67 .start = DMACH_SPI0_TX,
69 .flags = IORESOURCE_DMA,
72 .start = DMACH_SPI0_RX,
74 .flags = IORESOURCE_DMA,
79 .flags = IORESOURCE_IRQ,
83 static struct s3c64xx_spi_info s5pv210_spi0_pdata = {
84 .cfg_gpio = s5pv210_spi_cfg_gpio,
85 .fifo_lvl_mask = 0x1ff,
90 static u64 spi_dmamask = DMA_BIT_MASK(32);
92 struct platform_device s5pv210_device_spi0 = {
93 .name = "s3c64xx-spi",
95 .num_resources = ARRAY_SIZE(s5pv210_spi0_resource),
96 .resource = s5pv210_spi0_resource,
98 .dma_mask = &spi_dmamask,
99 .coherent_dma_mask = DMA_BIT_MASK(32),
100 .platform_data = &s5pv210_spi0_pdata,
104 static struct resource s5pv210_spi1_resource[] = {
106 .start = S5PV210_PA_SPI1,
107 .end = S5PV210_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 s5pv210_spi1_pdata = {
128 .cfg_gpio = s5pv210_spi_cfg_gpio,
129 .fifo_lvl_mask = 0x7f,
134 struct platform_device s5pv210_device_spi1 = {
135 .name = "s3c64xx-spi",
137 .num_resources = ARRAY_SIZE(s5pv210_spi1_resource),
138 .resource = s5pv210_spi1_resource,
140 .dma_mask = &spi_dmamask,
141 .coherent_dma_mask = DMA_BIT_MASK(32),
142 .platform_data = &s5pv210_spi1_pdata,
146 void __init s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs)
148 struct s3c64xx_spi_info *pd;
150 /* Reject invalid configuration */
151 if (!num_cs || src_clk_nr < 0
152 || src_clk_nr > S5PV210_SPI_SRCCLK_SCLK) {
153 printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
159 pd = &s5pv210_spi0_pdata;
162 pd = &s5pv210_spi1_pdata;
165 printk(KERN_ERR "%s: Invalid SPI controller(%d)\n",
171 pd->src_clk_nr = src_clk_nr;
172 pd->src_clk_name = spi_src_clks[src_clk_nr];