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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * linux/drivers/ide/legacy/buddha.c -- Amiga Buddha, Catweasel and X-Surf IDE Driver
3 *
4 * Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
5 *
6 * This driver was written based on the specifications in README.buddha and
7 * the X-Surf info from Inside_XSurf.txt available at
8 * http://www.jschoenfeld.com
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive for
12 * more details.
13 *
14 * TODO:
15 * - test it :-)
16 * - tune the timings using the speed-register
17 */
18
19#include <linux/types.h>
20#include <linux/mm.h>
21#include <linux/interrupt.h>
22#include <linux/blkdev.h>
23#include <linux/hdreg.h>
24#include <linux/zorro.h>
25#include <linux/ide.h>
26#include <linux/init.h>
27
28#include <asm/amigahw.h>
29#include <asm/amigaints.h>
30
31
32 /*
33 * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
34 */
35
36#define BUDDHA_NUM_HWIFS 2
37#define CATWEASEL_NUM_HWIFS 3
38#define XSURF_NUM_HWIFS 2
39
40 /*
41 * Bases of the IDE interfaces (relative to the board address)
42 */
43
44#define BUDDHA_BASE1 0x800
45#define BUDDHA_BASE2 0xa00
46#define BUDDHA_BASE3 0xc00
47
48#define XSURF_BASE1 0xb000 /* 2.5" Interface */
49#define XSURF_BASE2 0xd000 /* 3.5" Interface */
50
51static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
52 BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
53};
54
55static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
56 XSURF_BASE1, XSURF_BASE2
57};
58
59
60 /*
61 * Offsets from one of the above bases
62 */
63
64#define BUDDHA_DATA 0x00
65#define BUDDHA_ERROR 0x06 /* see err-bits */
66#define BUDDHA_NSECTOR 0x0a /* nr of sectors to read/write */
67#define BUDDHA_SECTOR 0x0e /* starting sector */
68#define BUDDHA_LCYL 0x12 /* starting cylinder */
69#define BUDDHA_HCYL 0x16 /* high byte of starting cyl */
70#define BUDDHA_SELECT 0x1a /* 101dhhhh , d=drive, hhhh=head */
71#define BUDDHA_STATUS 0x1e /* see status-bits */
72#define BUDDHA_CONTROL 0x11a
73#define XSURF_CONTROL -1 /* X-Surf has no CS1* (Control/AltStat) */
74
75static int buddha_offsets[IDE_NR_PORTS] __initdata = {
76 BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
77 BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, BUDDHA_CONTROL, -1
78};
79
80static int xsurf_offsets[IDE_NR_PORTS] __initdata = {
81 BUDDHA_DATA, BUDDHA_ERROR, BUDDHA_NSECTOR, BUDDHA_SECTOR, BUDDHA_LCYL,
82 BUDDHA_HCYL, BUDDHA_SELECT, BUDDHA_STATUS, XSURF_CONTROL, -1
83};
84
85 /*
86 * Other registers
87 */
88
89#define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
90#define BUDDHA_IRQ2 0xf40 /* interrupt */
91#define BUDDHA_IRQ3 0xf80
92
93#define XSURF_IRQ1 0x7e
94#define XSURF_IRQ2 0x7e
95
96static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
97 BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
98};
99
100static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
101 XSURF_IRQ1, XSURF_IRQ2
102};
103
104#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
105
106
107 /*
108 * Board information
109 */
110
111typedef enum BuddhaType_Enum {
112 BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
113} BuddhaType;
114
115
116 /*
117 * Check and acknowledge the interrupt status
118 */
119
120static int buddha_ack_intr(ide_hwif_t *hwif)
121{
122 unsigned char ch;
123
124 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
125 if (!(ch & 0x80))
126 return 0;
127 return 1;
128}
129
130static int xsurf_ack_intr(ide_hwif_t *hwif)
131{
132 unsigned char ch;
133
134 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
135 /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
136 z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]);
137 if (!(ch & 0x80))
138 return 0;
139 return 1;
140}
141
142 /*
143 * Probe for a Buddha or Catweasel IDE interface
144 */
145
146void __init buddha_init(void)
147{
148 hw_regs_t hw;
149 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100150 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151
152 struct zorro_dev *z = NULL;
153 u_long buddha_board = 0;
154 BuddhaType type;
155 int buddha_num_hwifs;
156
157 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
158 unsigned long board;
159 if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
160 buddha_num_hwifs = BUDDHA_NUM_HWIFS;
161 type=BOARD_BUDDHA;
162 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
163 buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
164 type=BOARD_CATWEASEL;
165 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
166 buddha_num_hwifs = XSURF_NUM_HWIFS;
167 type=BOARD_XSURF;
168 } else
169 continue;
170
171 board = z->resource.start;
172
173/*
174 * FIXME: we now have selectable mmio v/s iomio transports.
175 */
176
177 if(type != BOARD_XSURF) {
178 if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
179 continue;
180 } else {
181 if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
182 continue;
183 if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
184 goto fail_base2;
185 if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
186 release_mem_region(board+XSURF_BASE2, 0x1000);
187fail_base2:
188 release_mem_region(board+XSURF_BASE1, 0x1000);
189 continue;
190 }
191 }
192 buddha_board = ZTWO_VADDR(board);
193
194 /* write to BUDDHA_IRQ_MR to enable the board IRQ */
195 /* X-Surf doesn't have this. IRQs are always on */
196 if (type != BOARD_XSURF)
197 z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
198
199 for(i=0;i<buddha_num_hwifs;i++) {
200 if(type != BOARD_XSURF) {
201 ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
202 buddha_offsets, 0,
203 (buddha_board+buddha_irqports[i]),
204 buddha_ack_intr,
205// budda_iops,
206 IRQ_AMIGA_PORTS);
207 } else {
208 ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
209 xsurf_offsets, 0,
210 (buddha_board+xsurf_irqports[i]),
211 xsurf_ack_intr,
212// xsurf_iops,
213 IRQ_AMIGA_PORTS);
214 }
Bartlomiej Zolnierkiewiczfd9bb532007-10-20 00:32:31 +0200215
Bartlomiej Zolnierkiewiczcbb010c2008-01-26 20:13:06 +0100216 hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
217 if (hwif) {
218 u8 index = hwif->index;
219
220 ide_init_port_data(hwif, index);
221 ide_init_port_hw(hwif, &hw);
222
Bartlomiej Zolnierkiewicz2ad1e552007-02-17 02:40:25 +0100223 hwif->mmio = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 printk("ide%d: ", index);
225 switch(type) {
226 case BOARD_BUDDHA:
227 printk("Buddha");
228 break;
229 case BOARD_CATWEASEL:
230 printk("Catweasel");
231 break;
232 case BOARD_XSURF:
233 printk("X-Surf");
234 break;
235 }
236 printk(" IDE interface\n");
237 }
238 }
239 }
240}