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
)
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
);
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
);
58 dev_err(&pdev
->dev
, "Invalid SPI Controller number!");
65 static struct resource s5pv210_spi0_resource
[] = {
67 .start
= S5PV210_PA_SPI0
,
68 .end
= S5PV210_PA_SPI0
+ 0x100 - 1,
69 .flags
= IORESOURCE_MEM
,
72 .start
= DMACH_SPI0_TX
,
74 .flags
= IORESOURCE_DMA
,
77 .start
= DMACH_SPI0_RX
,
79 .flags
= IORESOURCE_DMA
,
84 .flags
= IORESOURCE_IRQ
,
88 static struct s3c64xx_spi_info s5pv210_spi0_pdata
= {
89 .cfg_gpio
= s5pv210_spi_cfg_gpio
,
90 .fifo_lvl_mask
= 0x1ff,
95 static u64 spi_dmamask
= DMA_BIT_MASK(32);
97 struct platform_device s5pv210_device_spi0
= {
98 .name
= "s3c64xx-spi",
100 .num_resources
= ARRAY_SIZE(s5pv210_spi0_resource
),
101 .resource
= s5pv210_spi0_resource
,
103 .dma_mask
= &spi_dmamask
,
104 .coherent_dma_mask
= DMA_BIT_MASK(32),
105 .platform_data
= &s5pv210_spi0_pdata
,
109 static struct resource s5pv210_spi1_resource
[] = {
111 .start
= S5PV210_PA_SPI1
,
112 .end
= S5PV210_PA_SPI1
+ 0x100 - 1,
113 .flags
= IORESOURCE_MEM
,
116 .start
= DMACH_SPI1_TX
,
117 .end
= DMACH_SPI1_TX
,
118 .flags
= IORESOURCE_DMA
,
121 .start
= DMACH_SPI1_RX
,
122 .end
= DMACH_SPI1_RX
,
123 .flags
= IORESOURCE_DMA
,
128 .flags
= IORESOURCE_IRQ
,
132 static struct s3c64xx_spi_info s5pv210_spi1_pdata
= {
133 .cfg_gpio
= s5pv210_spi_cfg_gpio
,
134 .fifo_lvl_mask
= 0x7f,
139 struct platform_device s5pv210_device_spi1
= {
140 .name
= "s3c64xx-spi",
142 .num_resources
= ARRAY_SIZE(s5pv210_spi1_resource
),
143 .resource
= s5pv210_spi1_resource
,
145 .dma_mask
= &spi_dmamask
,
146 .coherent_dma_mask
= DMA_BIT_MASK(32),
147 .platform_data
= &s5pv210_spi1_pdata
,
151 void __init
s5pv210_spi_set_info(int cntrlr
, int src_clk_nr
, int num_cs
)
153 struct s3c64xx_spi_info
*pd
;
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__
);
164 pd
= &s5pv210_spi0_pdata
;
167 pd
= &s5pv210_spi1_pdata
;
170 printk(KERN_ERR
"%s: Invalid SPI controller(%d)\n",
176 pd
->src_clk_nr
= src_clk_nr
;
177 pd
->src_clk_name
= spi_src_clks
[src_clk_nr
];