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ARM: cns3xxx: Add support for SDHCI controllers 

CNS3xxx chips have SDHCI-compatible SDIO/SD/MMC controller. This patch
adds the support using sdhci-cns3xxx driver.

Signed-off-by: Anton Vorontsov <avorontsov@mvista.com>
This commit is contained in:
Anton Vorontsov 2010-05-28 13:14:44 +04:00
parent 5f32f7a028
commit 6279d0ea92
4 changed files with 82 additions and 1 deletions
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2
arch/arm/mach-cns3xxx/Makefile
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@ -1,3 +1,3 @@
obj-$(CONFIG_ARCH_CNS3XXX) += core.o pm.o
obj-$(CONFIG_ARCH_CNS3XXX) += core.o pm.o devices.o
obj-$(CONFIG_PCI) += pcie.o
obj-$(CONFIG_MACH_CNS3420VB) += cns3420vb.o

3
arch/arm/mach-cns3xxx/cns3420vb.c
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@ -32,6 +32,7 @@
#include <mach/cns3xxx.h>
#include <mach/irqs.h>
#include "core.h"
#include "devices.h"
/*
* NOR Flash
@ -117,6 +118,8 @@ static void __init cns3420_init(void)
{
platform_add_devices(cns3420_pdevs, ARRAY_SIZE(cns3420_pdevs));
cns3xxx_sdhci_init();
pm_power_off = cns3xxx_power_off;
}

59
arch/arm/mach-cns3xxx/devices.c Normal file
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@ -0,0 +1,59 @@
/*
* CNS3xxx common devices
*
* Copyright 2008 Cavium Networks
* Scott Shu
* Copyright 2010 MontaVista Software, LLC.
* Anton Vorontsov <avorontsov@mvista.com>
*
* This file 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/io.h>
#include <linux/init.h>
#include <linux/compiler.h>
#include <linux/platform_device.h>
#include <mach/cns3xxx.h>
#include <mach/irqs.h>
#include "core.h"
#include "devices.h"
/*
* SDHCI
*/
static struct resource cns3xxx_sdhci_resources[] = {
[0] = {
.start = CNS3XXX_SDIO_BASE,
.end = CNS3XXX_SDIO_BASE + SZ_4K - 1,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_CNS3XXX_SDIO,
.end = IRQ_CNS3XXX_SDIO,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device cns3xxx_sdhci_pdev = {
.name = "sdhci-cns3xxx",
.id = 0,
.num_resources = ARRAY_SIZE(cns3xxx_sdhci_resources),
.resource = cns3xxx_sdhci_resources,
};
void __init cns3xxx_sdhci_init(void)
{
u32 __iomem *gpioa = __io(CNS3XXX_MISC_BASE_VIRT + 0x0014);
u32 gpioa_pins = __raw_readl(gpioa);
/* MMC/SD pins share with GPIOA */
gpioa_pins |= 0x1fff0004;
__raw_writel(gpioa_pins, gpioa);
cns3xxx_pwr_clk_en(CNS3XXX_PWR_CLK_EN(SDIO));
cns3xxx_pwr_soft_rst(CNS3XXX_PWR_SOFTWARE_RST(SDIO));
platform_device_register(&cns3xxx_sdhci_pdev);
}

19
arch/arm/mach-cns3xxx/devices.h Normal file
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@ -0,0 +1,19 @@
/*
* CNS3xxx common devices
*
* Copyright 2008 Cavium Networks
* Scott Shu
* Copyright 2010 MontaVista Software, LLC.
* Anton Vorontsov <avorontsov@mvista.com>
*
* This file 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 __CNS3XXX_DEVICES_H_
#define __CNS3XXX_DEVICES_H_
void __init cns3xxx_sdhci_init(void);
#endif /* __CNS3XXX_DEVICES_H_ */