1 /* $Id: cf-enabler.c,v 1.1.1.1.2.1 2003/06/24 08:52:51 dwmw2 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 #include <linux/delay.h>
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 */
46 extern 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*/
49 void *cf_io_base;
50
allocate_cf_area(void)51 static 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 /* XXX : do we need attribute and common-memory area also? */
69
70 return 0;
71 }
72 #endif
73
cf_init_default(void)74 static int __init cf_init_default(void)
75 {
76 /* You must have enabled the card, and set the level interrupt
77 * before reaching this point. Possibly in boot ROM or boot loader.
78 */
79 #if defined(CONFIG_IDE) && defined(__SH4__)
80 allocate_cf_area();
81 #endif
82 #if defined(CONFIG_SH_UNKNOWN)
83 /* This should be done in each board's init_xxx_irq. */
84 make_imask_irq(14);
85 disable_irq(14);
86 #endif
87 return 0;
88 }
89
90 #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_HS7729PCI)
91 #include <asm/hitachi_se.h>
92
93 /*
94 * SolutionEngine
95 *
96 * 0xB8400000 : Common Memory
97 * 0xB8500000 : Attribute
98 * 0xB8600000 : I/O
99 */
100
cf_init_se(void)101 static int __init cf_init_se(void)
102 {
103 if ((ctrl_inw(MRSHPC_CSR) & 0x000c) != 0)
104 return 0; /* Not detected */
105
106 if ((ctrl_inw(MRSHPC_CSR) & 0x0080) == 0) {
107 ctrl_outw(0x0674, MRSHPC_CPWCR); /* Card Vcc is 3.3v? */
108 } else {
109 ctrl_outw(0x0678, MRSHPC_CPWCR); /* Card Vcc is 5V */
110 }
111
112 /*
113 * PC-Card window open
114 * flag == COMMON/ATTRIBUTE/IO
115 */
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);
121 else
122 /* common mode & bus width 16bit SWAP = 0*/
123 ctrl_outw(0x0300, MRSHPC_MW0CR2);
124
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);
130 else
131 /* attribute mode & bus width 16bit SWAP = 0*/
132 ctrl_outw(0x0200, MRSHPC_MW1CR2);
133
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*/
139 else
140 ctrl_outw(0x0200, MRSHPC_IOWCR2); /* bus width 16bit SWAP = 0*/
141
142 ctrl_outw(0x2000, MRSHPC_ICR);
143 ctrl_outb(0x00, PA_MRSHPC_MW2 + 0x206);
144 ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
145
146 if (MACH_HS7729PCI) {
147 /* Empirical evidence shows that we have to delay for
148 ten milliseconds and then redo the last outb.
149 I have no clue why. And all the docs are in Japanese
150 so I feel no shame in just doing it this way. Besides,
151 all this is just a crap hack for the fact that we don't
152 have sensible userspace-less PCMCIA support in 2.4.
153
154 dwmw2.
155 */
156 mdelay(10);
157 ctrl_outb(0x42, PA_MRSHPC_MW2 + 0x200);
158 }
159
160 return 0;
161 }
162 #endif
163
cf_init(void)164 int __init cf_init(void)
165 {
166 #if defined(CONFIG_SH_GENERIC) || defined(CONFIG_SH_SOLUTION_ENGINE) || defined(CONFIG_SH_HS7729PCI)
167 if (MACH_SE || MACH_HS7729PCI) {
168 return cf_init_se();
169 }
170 #endif
171 return cf_init_default();
172 }
173
174 __initcall (cf_init);
175