/* $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;}#endifstatic 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;}#endifint __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);