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ARM: S5P6442: Define SPI platform devices

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Define SPI platform devices for the SoC.

Signed-off-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Jassi Brar 2010-05-18 16:43:45 +09:00 committed by Ben Dooks
parent f0c303a687
commit e8a3931d5f
6 changed files with 145 additions and 0 deletions
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1
arch/arm/mach-s5p6442/Makefile
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@ -21,3 +21,4 @@ obj-$(CONFIG_MACH_SMDK6442) += mach-smdk6442.o
# device support
obj-y += dev-audio.o
obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o

123
arch/arm/mach-s5p6442/dev-spi.c Normal file
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@ -0,0 +1,123 @@
/* linux/arch/arm/mach-s5p6442/dev-spi.c
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
* 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 <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <mach/dma.h>
#include <mach/map.h>
#include <mach/irqs.h>
#include <mach/gpio.h>
#include <mach/spi-clocks.h>
#include <plat/s3c64xx-spi.h>
#include <plat/gpio-cfg.h>
static char *spi_src_clks[] = {
[S5P6442_SPI_SRCCLK_PCLK] = "pclk",
[S5P6442_SPI_SRCCLK_SCLK] = "spi_epll",
};
/* 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 s5p6442_spi_cfg_gpio(struct platform_device *pdev)
{
switch (pdev->id) {
case 0:
s3c_gpio_cfgpin(S5P6442_GPB(0), S3C_GPIO_SFN(2));
s3c_gpio_cfgpin(S5P6442_GPB(2), S3C_GPIO_SFN(2));
s3c_gpio_cfgpin(S5P6442_GPB(3), S3C_GPIO_SFN(2));
s3c_gpio_setpull(S5P6442_GPB(0), S3C_GPIO_PULL_UP);
s3c_gpio_setpull(S5P6442_GPB(2), S3C_GPIO_PULL_UP);
s3c_gpio_setpull(S5P6442_GPB(3), S3C_GPIO_PULL_UP);
break;
default:
dev_err(&pdev->dev, "Invalid SPI Controller number!");
return -EINVAL;
}
return 0;
}
static struct resource s5p6442_spi0_resource[] = {
[0] = {
.start = S5P6442_PA_SPI,
.end = S5P6442_PA_SPI + 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 s5p6442_spi0_pdata = {
.cfg_gpio = s5p6442_spi_cfg_gpio,
.fifo_lvl_mask = 0x1ff,
.rx_lvl_offset = 15,
};
static u64 spi_dmamask = DMA_BIT_MASK(32);
struct platform_device s5p6442_device_spi = {
.name = "s3c64xx-spi",
.id = 0,
.num_resources = ARRAY_SIZE(s5p6442_spi0_resource),
.resource = s5p6442_spi0_resource,
.dev = {
.dma_mask = &spi_dmamask,
.coherent_dma_mask = DMA_BIT_MASK(32),
.platform_data = &s5p6442_spi0_pdata,
},
};
void __init s5p6442_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 > S5P6442_SPI_SRCCLK_SCLK) {
printk(KERN_ERR "%s: Invalid SPI configuration\n", __func__);
return;
}
switch (cntrlr) {
case 0:
pd = &s5p6442_spi0_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];
}

2
arch/arm/mach-s5p6442/include/mach/map.h
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@ -54,6 +54,8 @@
#define S5P6442_PA_SDRAM (0x20000000)
#define S5P_PA_SDRAM S5P6442_PA_SDRAM
#define S5P6442_PA_SPI 0xEC300000
/* I2S */
#define S5P6442_PA_I2S0 0xC0B00000
#define S5P6442_PA_I2S1 0xF2200000

17
arch/arm/mach-s5p6442/include/mach/spi-clocks.h Normal file
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@ -0,0 +1,17 @@
/* linux/arch/arm/mach-s5p6442/include/mach/spi-clocks.h
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd.
* Jaswinder Singh <jassi.brar@samsung.com>
*
* 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.
*/
#ifndef __S5P6442_PLAT_SPI_CLKS_H
#define __S5P6442_PLAT_SPI_CLKS_H __FILE__
#define S5P6442_SPI_SRCCLK_PCLK 0
#define S5P6442_SPI_SRCCLK_SCLK 1
#endif /* __S5P6442_PLAT_SPI_CLKS_H */

1
arch/arm/plat-samsung/include/plat/devs.h
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@ -82,6 +82,7 @@ extern struct platform_device s5p6442_device_pcm0;
extern struct platform_device s5p6442_device_pcm1;
extern struct platform_device s5p6442_device_iis0;
extern struct platform_device s5p6442_device_iis1;
extern struct platform_device s5p6442_device_spi;
extern struct platform_device s5p6440_device_pcm;
extern struct platform_device s5p6440_device_iis;

1
arch/arm/plat-samsung/include/plat/s3c64xx-spi.h
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@ -65,5 +65,6 @@ struct s3c64xx_spi_info {
extern void s3c64xx_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5pc100_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5pv210_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
extern void s5p6442_spi_set_info(int cntrlr, int src_clk_nr, int num_cs);
#endif /* __S3C64XX_PLAT_SPI_H */