Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* $Id: cf-enabler.c,v 1.4 2004/02/22 22:44:36 kkojima 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/init.h> |
Paul Mundt | 373e68b | 2006-09-27 15:41:24 +0900 | [diff] [blame] | 13 | #include <linux/mm.h> |
| 14 | #include <linux/vmalloc.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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(CONFIG_CPU_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 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #if defined(CONFIG_CF_AREA6) |
| 38 | #define slot_no 0 |
| 39 | #else |
| 40 | #define slot_no 1 |
| 41 | #endif |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | /* use this pointer to access to directly connected compact flash io area*/ |
| 44 | void *cf_io_base; |
| 45 | |
| 46 | static int __init allocate_cf_area(void) |
| 47 | { |
| 48 | pgprot_t prot; |
| 49 | unsigned long paddrbase, psize; |
| 50 | |
| 51 | /* open I/O area window */ |
| 52 | paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR); |
| 53 | psize = PAGE_SIZE; |
| 54 | prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16); |
| 55 | cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot); |
| 56 | if (!cf_io_base) { |
| 57 | printk("allocate_cf_area : can't open CF I/O window!\n"); |
| 58 | return -ENOMEM; |
| 59 | } |
| 60 | /* printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n", |
Paul Mundt | d7cdc9e | 2006-09-27 15:16:42 +0900 | [diff] [blame] | 61 | paddrbase, psize, prot.pgprot, cf_io_base);*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | |
| 63 | /* XXX : do we need attribute and common-memory area also? */ |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | #endif |
| 68 | |
| 69 | static int __init cf_init_default(void) |
| 70 | { |
| 71 | /* You must have enabled the card, and set the level interrupt |
| 72 | * before reaching this point. Possibly in boot ROM or boot loader. |
| 73 | */ |
| 74 | #if defined(CONFIG_IDE) && defined(CONFIG_CPU_SH4) |
| 75 | allocate_cf_area(); |
| 76 | #endif |
| 77 | #if defined(CONFIG_SH_UNKNOWN) |
| 78 | /* This should be done in each board's init_xxx_irq. */ |
| 79 | make_imask_irq(14); |
| 80 | disable_irq(14); |
| 81 | #endif |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | #if defined(CONFIG_SH_SOLUTION_ENGINE) |
Paul Mundt | 373e68b | 2006-09-27 15:41:24 +0900 | [diff] [blame] | 86 | #include <asm/se.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
| 88 | /* |
| 89 | * SolutionEngine |
| 90 | * |
| 91 | * 0xB8400000 : Common Memory |
| 92 | * 0xB8500000 : Attribute |
| 93 | * 0xB8600000 : I/O |
| 94 | */ |
| 95 | |
| 96 | static int __init cf_init_se(void) |
| 97 | { |
| 98 | if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0) |
| 99 | return 0; /* Not detected */ |
| 100 | |
| 101 | if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) { |
| 102 | ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */ |
| 103 | } else { |
| 104 | ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */ |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * PC-Card window open |
| 109 | * flag == COMMON/ATTRIBUTE/IO |
| 110 | */ |
| 111 | /* common window open */ |
| 112 | ctrl_outw(0x8a84, MRSHPC_MW0CR1);/* window 0xb8400000 */ |
| 113 | if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) |
| 114 | /* common mode & bus width 16bit SWAP = 1*/ |
| 115 | ctrl_outw(0x0b00, MRSHPC_MW0CR2); |
| 116 | else |
| 117 | /* common mode & bus width 16bit SWAP = 0*/ |
| 118 | ctrl_outw(0x0300, MRSHPC_MW0CR2); |
| 119 | |
| 120 | /* attribute window open */ |
| 121 | ctrl_outw(0x8a85, MRSHPC_MW1CR1);/* window 0xb8500000 */ |
| 122 | if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) |
| 123 | /* attribute mode & bus width 16bit SWAP = 1*/ |
| 124 | ctrl_outw(0x0a00, MRSHPC_MW1CR2); |
| 125 | else |
| 126 | /* attribute mode & bus width 16bit SWAP = 0*/ |
| 127 | ctrl_outw(0x0200, MRSHPC_MW1CR2); |
| 128 | |
| 129 | /* I/O window open */ |
| 130 | ctrl_outw(0x8a86, MRSHPC_IOWCR1);/* I/O window 0xb8600000 */ |
| 131 | ctrl_outw(0x0008, MRSHPC_CDCR); /* I/O card mode */ |
| 132 | if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0) |
| 133 | ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/ |
| 134 | else |
| 135 | ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/ |
| 136 | |
| 137 | ctrl_outw(0x2000, MRSHPC_ICR); |
| 138 | ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206); |
| 139 | ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200); |
| 140 | return 0; |
| 141 | } |
| 142 | #endif |
| 143 | |
| 144 | int __init cf_init(void) |
| 145 | { |
| 146 | #if defined(CONFIG_SH_SOLUTION_ENGINE) |
| 147 | if (MACH_SE) |
| 148 | return cf_init_se(); |
| 149 | #endif |
| 150 | return cf_init_default(); |
| 151 | } |
| 152 | |
| 153 | __initcall (cf_init); |