mirror of https://gitee.com/openkylin/linux.git
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/*
|
|
* sh7372 MMCIF loader
|
|
*
|
|
* Copyright (C) 2010 Magnus Damm
|
|
* Copyright (C) 2010 Simon Horman
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*/
|
|
|
|
#include <linux/mmc/sh_mmcif.h>
|
|
#include <linux/mmc/boot.h>
|
|
#include <mach/mmc.h>
|
|
|
|
#define MMCIF_BASE (void __iomem *)0xe6bd0000
|
|
|
|
#define PORT84CR (void __iomem *)0xe6050054
|
|
#define PORT85CR (void __iomem *)0xe6050055
|
|
#define PORT86CR (void __iomem *)0xe6050056
|
|
#define PORT87CR (void __iomem *)0xe6050057
|
|
#define PORT88CR (void __iomem *)0xe6050058
|
|
#define PORT89CR (void __iomem *)0xe6050059
|
|
#define PORT90CR (void __iomem *)0xe605005a
|
|
#define PORT91CR (void __iomem *)0xe605005b
|
|
#define PORT92CR (void __iomem *)0xe605005c
|
|
#define PORT99CR (void __iomem *)0xe6050063
|
|
|
|
#define SMSTPCR3 (void __iomem *)0xe615013c
|
|
|
|
/* SH7372 specific MMCIF loader
|
|
*
|
|
* loads the zImage from an MMC card starting from block 1.
|
|
*
|
|
* The image must be start with a vrl4 header and
|
|
* the zImage must start at offset 512 of the image. That is,
|
|
* at block 2 (=byte 1024) on the media
|
|
*
|
|
* Use the following line to write the vrl4 formated zImage
|
|
* to an MMC card
|
|
* # dd if=vrl4.out of=/dev/sdx bs=512 seek=1
|
|
*/
|
|
asmlinkage void mmc_loader(unsigned char *buf, unsigned long len)
|
|
{
|
|
mmc_init_progress();
|
|
mmc_update_progress(MMC_PROGRESS_ENTER);
|
|
|
|
/* Initialise MMC
|
|
* registers: PORT84CR-PORT92CR
|
|
* (MMCD0_0-MMCD0_7,MMCCMD0 Control)
|
|
* value: 0x04 - select function 4
|
|
*/
|
|
__raw_writeb(0x04, PORT84CR);
|
|
__raw_writeb(0x04, PORT85CR);
|
|
__raw_writeb(0x04, PORT86CR);
|
|
__raw_writeb(0x04, PORT87CR);
|
|
__raw_writeb(0x04, PORT88CR);
|
|
__raw_writeb(0x04, PORT89CR);
|
|
__raw_writeb(0x04, PORT90CR);
|
|
__raw_writeb(0x04, PORT91CR);
|
|
__raw_writeb(0x04, PORT92CR);
|
|
|
|
/* Initialise MMC
|
|
* registers: PORT99CR (MMCCLK0 Control)
|
|
* value: 0x10 | 0x04 - enable output | select function 4
|
|
*/
|
|
__raw_writeb(0x14, PORT99CR);
|
|
|
|
/* Enable clock to MMC hardware block */
|
|
__raw_writel(__raw_readl(SMSTPCR3) & ~(1 << 12), SMSTPCR3);
|
|
|
|
mmc_update_progress(MMC_PROGRESS_INIT);
|
|
|
|
/* setup MMCIF hardware */
|
|
sh_mmcif_boot_init(MMCIF_BASE);
|
|
|
|
mmc_update_progress(MMC_PROGRESS_LOAD);
|
|
|
|
/* load kernel via MMCIF interface */
|
|
sh_mmcif_boot_do_read(MMCIF_BASE, 2, /* Kernel is at block 2 */
|
|
(len + SH_MMCIF_BBS - 1) / SH_MMCIF_BBS, buf);
|
|
|
|
|
|
/* Disable clock to MMC hardware block */
|
|
__raw_writel(__raw_readl(SMSTPCR3) | (1 << 12), SMSTPCR3);
|
|
|
|
mmc_update_progress(MMC_PROGRESS_DONE);
|
|
}
|