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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [sh/] [kernel/] [cf-enabler.c] - Rev 1765
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/* $Id: cf-enabler.c,v 1.1.1.1 2004-04-15 01:17:35 phoenix 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 <linux/delay.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(__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(__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_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_HS7729PCI) #include <asm/hitachi_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); if (MACH_HS7729PCI) { /* Empirical evidence shows that we have to delay for ten milliseconds and then redo the last outb. I have no clue why. And all the docs are in Japanese so I feel no shame in just doing it this way. Besides, all this is just a crap hack for the fact that we don't have sensible userspace-less PCMCIA support in 2.4. dwmw2. */ mdelay(10); ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200); } return 0; } #endif int __init cf_init(void) { #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_HS7729PCI) if (MACH_SE || MACH_HS7729PCI) { return cf_init_se(); } #endif return cf_init_default(); } __initcall (cf_init);