1/* $Id: cf-enabler.c,v 1.1.1.1 2007/08/03 18:52:16 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/init.h>
13#include <linux/mm.h>
14#include <linux/vmalloc.h>
15#include <linux/interrupt.h>
16#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 */
33#if defined(CONFIG_CPU_SH4)
34/* SH4 can't access PCMCIA interface through P2 area.
35 * we must remap it with appropriate attribute bit of the page set.
36 * this part is based on Greg Banks' hd64465_ss.c implementation - Masahiro Abe */
37
38#if defined(CONFIG_CF_AREA6)
39#define slot_no 0
40#else
41#define slot_no 1
42#endif
43
44/* 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",
62		paddrbase, psize, prot.pgprot, cf_io_base);*/
63
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_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)
86#include <asm/se.h>
87#elif defined(CONFIG_SH_7722_SOLUTION_ENGINE)
88#include <asm/se7722.h>
89#endif
90
91/*
92 * SolutionEngine Seriese
93 *
94 * about MS770xSE
95 * 0xB8400000 : Common Memory
96 * 0xB8500000 : Attribute
97 * 0xB8600000 : I/O
98 *
99 * about MS7722SE
100 * 0xB0400000 : Common Memory
101 * 0xB0500000 : Attribute
102 * 0xB0600000 : I/O
103 */
104
105#if defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_7722_SOLUTION_ENGINE)
106static int __init cf_init_se(void)
107{
108	if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
109		return 0;	/* Not detected */
110
111	if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
112		ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
113	} else {
114		ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
115	}
116
117	/*
118	 *  PC-Card window open
119	 *  flag == COMMON/ATTRIBUTE/IO
120	 */
121	/* common window open */
122	ctrl_outw(0x8a84, MRSHPC_MW0CR1);
123	if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
124		/* common mode & bus width 16bit SWAP = 1*/
125		ctrl_outw(0x0b00, MRSHPC_MW0CR2);
126	else
127		/* common mode & bus width 16bit SWAP = 0*/
128		ctrl_outw(0x0300, MRSHPC_MW0CR2);
129
130	/* attribute window open */
131	ctrl_outw(0x8a85, MRSHPC_MW1CR1);
132	if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
133		/* attribute mode & bus width 16bit SWAP = 1*/
134		ctrl_outw(0x0a00, MRSHPC_MW1CR2);
135	else
136		/* attribute mode & bus width 16bit SWAP = 0*/
137		ctrl_outw(0x0200, MRSHPC_MW1CR2);
138
139	/* I/O window open */
140	ctrl_outw(0x8a86, MRSHPC_IOWCR1);
141	ctrl_outw(0x0008, MRSHPC_CDCR);	 /* I/O card mode */
142	if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
143		ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/
144	else
145		ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
146
147	ctrl_outw(0x2000, MRSHPC_ICR);
148	ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
149	ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
150	return 0;
151}
152#else
153static int __init cf_init_se(void)
154{
155	return -1;
156}
157#endif
158
159int __init cf_init(void)
160{
161	if( mach_is_se() || mach_is_7722se() ){
162		return cf_init_se();
163	}
164
165	return cf_init_default();
166}
167
168__initcall (cf_init);
169