1/* $Id: cf-enabler.c,v 1.1.1.1 2008/10/15 03:26:17 james26_jang Exp $ 2 * 3 * linux/drivers/block/cf-enabler.c 4 * 5 * Copyright (C) 1999 Niibe Yutaka 6 * Copyright (C) 2000 Toshiharu Nozawa 7 * Copyright (C) 2001 A&D Co., Ltd. 8 * 9 * Enable the CF configuration. 10 */ 11 12#include <linux/config.h> 13#include <linux/init.h> 14 15#include <asm/io.h> 16#include <asm/irq.h> 17 18/* 19 * You can connect Compact Flash directly to the bus of SuperH. 20 * This is the enabler for that. 21 * 22 * SIM: How generic is this really? It looks pretty board, or at 23 * least SH sub-type, specific to me. 24 * I know it doesn't work on the Overdrive! 25 */ 26 27/* 28 * 0xB8000000 : Attribute 29 * 0xB8001000 : Common Memory 30 * 0xBA000000 : I/O 31 */ 32#if defined(CONFIG_IDE) && defined(__SH4__) 33/* SH4 can't access PCMCIA interface through P2 area. 34 * we must remap it with appropreate attribute bit of the page set. 35 * this part is based on Greg Banks' hd64465_ss.c implementation - Masahiro Abe */ 36#include <linux/mm.h> 37#include <linux/vmalloc.h> 38 39#if defined(CONFIG_CF_AREA6) 40#define slot_no 0 41#else 42#define slot_no 1 43#endif 44 45/* defined in mm/ioremap.c */ 46extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags); 47 48/* use this pointer to access to directly connected compact flash io area*/ 49void *cf_io_base; 50 51static int __init allocate_cf_area(void) 52{ 53 pgprot_t prot; 54 unsigned long paddrbase, psize; 55 56 /* open I/O area window */ 57 paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR); 58 psize = PAGE_SIZE; 59 prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16); 60 cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot); 61 if (!cf_io_base) { 62 printk("allocate_cf_area : can't open CF I/O window!\n"); 63 return -ENOMEM; 64 } 65/* printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n", 66 paddrbase, psize, prot.pgprot, cf_io_base);*/ 67 68 69 return 0; 70} 71#endif 72 73static int __init cf_init_default(void) 74{ 75/* You must have enabled the card, and set the level interrupt 76 * before reaching this point. Possibly in boot ROM or boot loader. 77 */ 78#if defined(CONFIG_IDE) && defined(__SH4__) 79 allocate_cf_area(); 80#endif 81#if defined(CONFIG_SH_UNKNOWN) 82 /* This should be done in each board's init_xxx_irq. */ 83 make_imask_irq(14); 84 disable_irq(14); 85#endif 86 return 0; 87} 88 89#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) 90#include <asm/hitachi_se.h> 91 92/* 93 * SolutionEngine 94 * 95 * 0xB8400000 : Common Memory 96 * 0xB8500000 : Attribute 97 * 0xB8600000 : I/O 98 */ 99 100static int __init cf_init_se(void) 101{ 102 if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0) 103 return 0; /* Not detected */ 104 105 if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) { 106 ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */ 107 } else { 108 ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */ 109 } 110 111 /* 112 * PC-Card window open 113 * flag == COMMON/ATTRIBUTE/IO 114 */ 115 /* common window open */ 116 ctrl_outw(0x8a84, MRSHPC_MW0CR1);/* window 0xb8400000 */ 117 if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) 118 /* common mode & bus width 16bit SWAP = 1*/ 119 ctrl_outw(0x0b00, MRSHPC_MW0CR2); 120 else 121 /* common mode & bus width 16bit SWAP = 0*/ 122 ctrl_outw(0x0300, MRSHPC_MW0CR2); 123 124 /* attribute window open */ 125 ctrl_outw(0x8a85, MRSHPC_MW1CR1);/* window 0xb8500000 */ 126 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) 127 /* attribute mode & bus width 16bit SWAP = 1*/ 128 ctrl_outw(0x0a00, MRSHPC_MW1CR2); 129 else 130 /* attribute mode & bus width 16bit SWAP = 0*/ 131 ctrl_outw(0x0200, MRSHPC_MW1CR2); 132 133 /* I/O window open */ 134 ctrl_outw(0x8a86, MRSHPC_IOWCR1);/* I/O window 0xb8600000 */ 135 ctrl_outw(0x0008, MRSHPC_CDCR); /* I/O card mode */ 136 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) 137 ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/ 138 else 139 ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/ 140 141 ctrl_outw(0x2000, MRSHPC_ICR); 142 ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206); 143 ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200); 144 return 0; 145} 146#endif 147 148int __init cf_init(void) 149{ 150#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) 151 if (MACH_SE) 152 return cf_init_se(); 153#endif 154 return cf_init_default(); 155} 156 157__initcall (cf_init); 158