1/* $Id: cf-enabler.c,v 1.1.1.1 2008/10/15 03:26:17 james26_jang 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/config.h>
13#include <linux/init.h>
14
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(__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 */
36#include <linux/mm.h>
37#include <linux/vmalloc.h>
38
39#if defined(CONFIG_CF_AREA6)
40#define slot_no 0
41#else
42#define slot_no 1
43#endif
44
45/* defined in mm/ioremap.c */
46extern void * p3_ioremap(unsigned long phys_addr, unsigned long size, unsigned long flags);
47
48/* use this pointer to access to directly connected compact flash io area*/
49void *cf_io_base;
50
51static int __init allocate_cf_area(void)
52{
53	pgprot_t prot;
54	unsigned long paddrbase, psize;
55
56	/* open I/O area window */
57	paddrbase = virt_to_phys((void*)CONFIG_CF_BASE_ADDR);
58	psize = PAGE_SIZE;
59	prot = PAGE_KERNEL_PCC(slot_no, _PAGE_PCC_IO16);
60	cf_io_base = p3_ioremap(paddrbase, psize, prot.pgprot);
61	if (!cf_io_base) {
62		printk("allocate_cf_area : can't open CF I/O window!\n");
63		return -ENOMEM;
64	}
65/*	printk("p3_ioremap(paddr=0x%08lx, psize=0x%08lx, prot=0x%08lx)=0x%08lx\n",
66	    	paddrbase, psize, prot.pgprot, cf_io_base);*/
67
68
69	return 0;
70}
71#endif
72
73static int __init cf_init_default(void)
74{
75/* You must have enabled the card, and set the level interrupt
76 * before reaching this point. Possibly in boot ROM or boot loader.
77 */
78#if defined(CONFIG_IDE) && defined(__SH4__)
79	allocate_cf_area();
80#endif
81#if defined(CONFIG_SH_UNKNOWN)
82	/* This should be done in each board's init_xxx_irq. */
83	make_imask_irq(14);
84	disable_irq(14);
85#endif
86	return 0;
87}
88
89#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE)
90#include <asm/hitachi_se.h>
91
92/*
93 * SolutionEngine
94 *
95 * 0xB8400000 : Common Memory
96 * 0xB8500000 : Attribute
97 * 0xB8600000 : I/O
98 */
99
100static int __init cf_init_se(void)
101{
102	if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
103		return 0;	/* Not detected */
104
105	if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
106		ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
107	} else {
108		ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
109	}
110
111	/*
112	 *  PC-Card window open
113	 *  flag == COMMON/ATTRIBUTE/IO
114	 */
115	/* common window open */
116	ctrl_outw(0x8a84, MRSHPC_MW0CR1);/* window 0xb8400000 */
117	if((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
118		/* common mode & bus width 16bit SWAP = 1*/
119		ctrl_outw(0x0b00, MRSHPC_MW0CR2);
120	else
121		/* common mode & bus width 16bit SWAP = 0*/
122		ctrl_outw(0x0300, MRSHPC_MW0CR2);
123
124	/* attribute window open */
125	ctrl_outw(0x8a85, MRSHPC_MW1CR1);/* window 0xb8500000 */
126	if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
127		/* attribute mode & bus width 16bit SWAP = 1*/
128		ctrl_outw(0x0a00, MRSHPC_MW1CR2);
129	else
130		/* attribute mode & bus width 16bit SWAP = 0*/
131		ctrl_outw(0x0200, MRSHPC_MW1CR2);
132
133	/* I/O window open */
134	ctrl_outw(0x8a86, MRSHPC_IOWCR1);/* I/O window 0xb8600000 */
135	ctrl_outw(0x0008, MRSHPC_CDCR);	 /* I/O card mode */
136	if ((ctrl_inw(MRSHPC_CSR) & 0x4000) != 0)
137		ctrl_outw(0x0a00, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 1*/
138	else
139		ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
140
141	ctrl_outw(0x2000, MRSHPC_ICR);
142	ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
143	ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
144	return 0;
145}
146#endif
147
148int __init cf_init(void)
149{
150#if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE)
151	if (MACH_SE)
152		return cf_init_se();
153#endif
154	return cf_init_default();
155}
156
157__initcall (cf_init);
158