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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>
Evgeniy Polyakov66c52272007-05-31 13:46:21 +090015#include <linux/interrupt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <asm/io.h>
17#include <asm/irq.h>
18
19/*
20 * You can connect Compact Flash directly to the bus of SuperH.
21 * This is the enabler for that.
22 *
23 * SIM: How generic is this really? It looks pretty board, or at
24 * least SH sub-type, specific to me.
25 * I know it doesn't work on the Overdrive!
26 */
27
28/*
29 * 0xB8000000 : Attribute
30 * 0xB8001000 : Common Memory
31 * 0xBA000000 : I/O
32 */
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090033#if defined(CONFIG_CPU_SH4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034/* SH4 can't access PCMCIA interface through P2 area.
Simon Arlotte868d612007-05-14 08:15:10 +090035 * we must remap it with appropriate attribute bit of the page set.
Linus Torvalds1da177e2005-04-16 15:20:36 -070036 * this part is based on Greg Banks' hd64465_ss.c implementation - Masahiro Abe */
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38#if defined(CONFIG_CF_AREA6)
39#define slot_no 0
40#else
41#define slot_no 1
42#endif
43
Linus Torvalds1da177e2005-04-16 15:20:36 -070044/* use this pointer to access to directly connected compact flash io area*/
45void *cf_io_base;
46
47static int __init allocate_cf_area(void)
48{
49 pgprot_t prot;
50 unsigned long paddrbase, psize;
51
52 /* open I/O area window */
53 paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR);
54 psize = PAGE_SIZE;
55 prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16);
56 cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot);
57 if (!cf_io_base) {
58 printk("allocate_cf_area : can't open CF I/O window!\n");
59 return -ENOMEM;
60 }
61/* printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n",
Paul Mundtd7cdc9e2006-09-27 15:16:42 +090062 paddrbase, psize, prot.pgprot, cf_io_base);*/
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64 /* XXX : do we need attribute and common-memory area also? */
65
66 return 0;
67}
68#endif
69
70static int __init cf_init_default(void)
71{
72/* You must have enabled the card, and set the level interrupt
73 * before reaching this point. Possibly in boot ROM or boot loader.
74 */
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090075#if defined(CONFIG_CPU_SH4)
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 allocate_cf_area();
77#endif
Paul Mundtfd8f20e2007-05-15 15:38:30 +090078
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 return 0;
80}
81
82#if defined(CONFIG_SH_SOLUTION_ENGINE)
Paul Mundt373e68b2006-09-27 15:41:24 +090083#include <asm/se.h>
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090084#elif defined(CONFIG_SH_7722_SOLUTION_ENGINE)
85#include <asm/se7722.h>
86#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88/*
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090089 * SolutionEngine Seriese
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 *
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090091 * about MS770xSE
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 * 0xB8400000 : Common Memory
93 * 0xB8500000 : Attribute
94 * 0xB8600000 : I/O
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +090095 *
96 * about MS7722SE
97 * 0xB0400000 : Common Memory
98 * 0xB0500000 : Attribute
99 * 0xB0600000 : I/O
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 */
101
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900102#if defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_7722_SOLUTION_ENGINE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103static int __init cf_init_se(void)
104{
105 if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
106 return 0; /* Not detected */
107
108 if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
109 ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
110 } else {
111 ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
112 }
113
114 /*
115 * PC-Card window open
116 * flag == COMMON/ATTRIBUTE/IO
117 */
118 /* common window open */
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900119 ctrl_outw(0x8a84, MRSHPC_MW0CR1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
121 /* common mode & bus width 16bit SWAP = 1*/
122 ctrl_outw(0x0b00, MRSHPC_MW0CR2);
123 else
124 /* common mode & bus width 16bit SWAP = 0*/
125 ctrl_outw(0x0300, MRSHPC_MW0CR2);
126
127 /* attribute window open */
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900128 ctrl_outw(0x8a85, MRSHPC_MW1CR1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
130 /* attribute mode & bus width 16bit SWAP = 1*/
131 ctrl_outw(0x0a00, MRSHPC_MW1CR2);
132 else
133 /* attribute mode & bus width 16bit SWAP = 0*/
134 ctrl_outw(0x0200, MRSHPC_MW1CR2);
135
136 /* I/O window open */
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900137 ctrl_outw(0x8a86, MRSHPC_IOWCR1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 ctrl_outw(0x0008, MRSHPC_CDCR); /* I/O card mode */
139 if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
140 ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/
141 else
142 ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
143
144 ctrl_outw(0x2000, MRSHPC_ICR);
145 ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
146 ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
147 return 0;
148}
Evgeniy Polyakov66c52272007-05-31 13:46:21 +0900149#else
150static int __init cf_init_se(void)
151{
152 return -1;
153}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154#endif
155
156int __init cf_init(void)
157{
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900158 if( mach_is_se() || mach_is_7722se() ){
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return cf_init_se();
Ryusuke Sakato6865f0e2007-05-01 09:45:29 +0900160 }
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 return cf_init_default();
163}
164
165__initcall (cf_init);