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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* $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 Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/init.h>
Paul Mundt373e68b2006-09-27 15:41:24 +090013#include <linux/mm.h>
14#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#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 Torvalds1da177e2005-04-16 15:20:36 -070036
37#if defined(CONFIG_CF_AREA6)
38#define slot_no 0
39#else
40#define slot_no 1
41#endif
42
Linus Torvalds1da177e2005-04-16 15:20:36 -070043/* use this pointer to access to directly connected compact flash io area*/
44void *cf_io_base;
45
46static 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 Mundtd7cdc9e2006-09-27 15:16:42 +090061 paddrbase, psize, prot.pgprot, cf_io_base);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63 /* XXX : do we need attribute and common-memory area also? */
64
65 return 0;
66}
67#endif
68
69static 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 Mundt373e68b2006-09-27 15:41:24 +090086#include <asm/se.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88/*
89 * SolutionEngine
90 *
91 * 0xB8400000 : Common Memory
92 * 0xB8500000 : Attribute
93 * 0xB8600000 : I/O
94 */
95
96static 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
144int __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);