/* $Id: cf-enabler.c,v 1.4 2004/02/22 22:44:36 kkojima Exp $
*
* linux/drivers/block/cf-enabler.c
*
* Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000 Toshiharu Nozawa
* Copyright (C) 2001 A&D Co., Ltd.
*
* Enable the CF configuration.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/irq.h>
/*
* You can connect Compact Flash directly to the bus of SuperH.
* This is the enabler for that.
*
* SIM: How generic is this really? It looks pretty board, or at
* least SH sub-type, specific to me.
* I know it doesn't work on the Overdrive!
*/
/*
* 0xB8000000 : Attribute
* 0xB8001000 : Common Memory
* 0xBA000000 : I/O
*/
#if defined(CONFIG_IDE) && defined(CONFIG_CPU_SH4)
/* SH4 can't access PCMCIA interface through P2 area.
* we must remap it with appropreate attribute bit of the page set.
* this part is based on Greg Banks' hd64465_ss.c implementation - Masahiro Abe */
#include <linux/mm.h>
#include <linux/vmalloc.h>
#if defined(CONFIG_CF_AREA6)
#define slot_no 0
#else
#define slot_no 1
#endif
/* defined in mm/ioremap.c */
extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
/* use this pointer to access to directly connected compact flash io area*/
void *cf_io_base;
static int __init allocate_cf_area(void)
{
pgprot_t prot;
unsigned long paddrbase, psize;
/* open I/O area window */
paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR);
psize = PAGE_SIZE;
prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16);
cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot);
if (!cf_io_base) {
printk("allocate_cf_area : can't open CF I/O window!\n");
return -ENOMEM;
}
/* printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n",
paddrbase, psize, prot.pgprot, cf_io_base);*/
/* XXX : do we need attribute and common-memory area also? */
return 0;
}
#endif
static int __init cf_init_default(void)
{
/* You must have enabled the card, and set the level interrupt
* before reaching this point. Possibly in boot ROM or boot loader.
*/
#if defined(CONFIG_IDE) && defined(CONFIG_CPU_SH4)
allocate_cf_area();
#endif
#if defined(CONFIG_SH_UNKNOWN)
/* This should be done in each board's init_xxx_irq. */
make_imask_irq(14);
disable_irq(14);
#endif
return 0;
}
#if defined(CONFIG_SH_SOLUTION_ENGINE)
#include <asm/se/se.h>
/*
* SolutionEngine
*
* 0xB8400000 : Common Memory
* 0xB8500000 : Attribute
* 0xB8600000 : I/O
*/
static int __init cf_init_se(void)
{
if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
return 0; /* Not detected */
if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
} else {
ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
}
/*
* PC-Card window open
* flag == COMMON/ATTRIBUTE/IO
*/
/* common window open */
ctrl_outw(0x8a84, MRSHPC_MW0CR1);/* window 0xb8400000 */
if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
/* common mode & bus width 16bit SWAP = 1*/
ctrl_outw(0x0b00, MRSHPC_MW0CR2);
else
/* common mode & bus width 16bit SWAP = 0*/
ctrl_outw(0x0300, MRSHPC_MW0CR2);
/* attribute window open */
ctrl_outw(0x8a85, MRSHPC_MW1CR1);/* window 0xb8500000 */
if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
/* attribute mode & bus width 16bit SWAP = 1*/
ctrl_outw(0x0a00, MRSHPC_MW1CR2);
else
/* attribute mode & bus width 16bit SWAP = 0*/
ctrl_outw(0x0200, MRSHPC_MW1CR2);
/* I/O window open */
ctrl_outw(0x8a86, MRSHPC_IOWCR1);/* I/O window 0xb8600000 */
ctrl_outw(0x0008, MRSHPC_CDCR); /* I/O card mode */
if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/
else
ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
ctrl_outw(0x2000, MRSHPC_ICR);
ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
return 0;
}
#endif
int __init cf_init(void)
{
#if defined(CONFIG_SH_SOLUTION_ENGINE)
if (MACH_SE)
return cf_init_se();
#endif
return cf_init_default();
}
__initcall (cf_init);
