1 /* $Id: cf-enabler.c,v 1.4 2004/02/22 22:44:36 kkojima Exp $
3 * linux/drivers/block/cf-enabler.c
5 * Copyright (C) 1999 Niibe Yutaka
6 * Copyright (C) 2000 Toshiharu Nozawa
7 * Copyright (C) 2001 A&D Co., Ltd.
9 * Enable the CF configuration.
12 #include <linux/config.h>
13 #include <linux/init.h>
19 * You can connect Compact Flash directly to the bus of SuperH.
20 * This is the enabler for that.
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!
28 * 0xB8000000 : Attribute
29 * 0xB8001000 : Common Memory
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 */
37 #include <linux/vmalloc.h>
39 #if defined(CONFIG_CF_AREA6)
45 /* defined in mm/ioremap.c */
46 extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
48 /* use this pointer to access to directly connected compact flash io area*/
51 static int __init allocate_cf_area(void)
54 unsigned long paddrbase, psize;
56 /* open I/O area window */
57 paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR);
59 prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16);
60 cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot);
62 printk("allocate_cf_area : can't open CF I/O window!\n");
65 /* printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n",
66 paddrbase, psize, prot.pgprot, cf_io_base);*/
68 /* XXX : do we need attribute and common-memory area also? */
74 static int __init cf_init_default(void)
76 /* You must have enabled the card, and set the level interrupt
77 * before reaching this point. Possibly in boot ROM or boot loader.
79 #if defined(CONFIG_IDE) && defined(CONFIG_CPU_SH4)
82 #if defined(CONFIG_SH_UNKNOWN)
83 /* This should be done in each board's init_xxx_irq. */
90 #if defined(CONFIG_SH_SOLUTION_ENGINE)
91 #include <asm/se/se.h>
96 * 0xB8400000 : Common Memory
97 * 0xB8500000 : Attribute
101 static int __init cf_init_se(void)
103 if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
104 return 0; /* Not detected */
106 if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
107 ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
109 ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
113 * PC-Card window open
114 * flag == COMMON/ATTRIBUTE/IO
116 /* common window open */
117 ctrl_outw(0x8a84, MRSHPC_MW0CR1);/* window 0xb8400000 */
118 if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
119 /* common mode & bus width 16bit SWAP = 1*/
120 ctrl_outw(0x0b00, MRSHPC_MW0CR2);
122 /* common mode & bus width 16bit SWAP = 0*/
123 ctrl_outw(0x0300, MRSHPC_MW0CR2);
125 /* attribute window open */
126 ctrl_outw(0x8a85, MRSHPC_MW1CR1);/* window 0xb8500000 */
127 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
128 /* attribute mode & bus width 16bit SWAP = 1*/
129 ctrl_outw(0x0a00, MRSHPC_MW1CR2);
131 /* attribute mode & bus width 16bit SWAP = 0*/
132 ctrl_outw(0x0200, MRSHPC_MW1CR2);
134 /* I/O window open */
135 ctrl_outw(0x8a86, MRSHPC_IOWCR1);/* I/O window 0xb8600000 */
136 ctrl_outw(0x0008, MRSHPC_CDCR); /* I/O card mode */
137 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
138 ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/
140 ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
142 ctrl_outw(0x2000, MRSHPC_ICR);
143 ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
144 ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
149 int __init cf_init(void)
151 #if defined(CONFIG_SH_SOLUTION_ENGINE)
155 return cf_init_default();
158 __initcall (cf_init);