pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / ide / legacy / buddha.c
blob101aee1711c489c7985bc1d730e3ca6fb1452c29
1 /*
2 * linux/drivers/ide/legacy/buddha.c -- Amiga Buddha, Catweasel and X-Surf IDE Driver
4 * Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
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
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.
14 * TODO:
15 * - test it :-)
16 * - tune the timings using the speed-register
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>
28 #include <asm/amigahw.h>
29 #include <asm/amigaints.h>
33 * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
36 #define BUDDHA_NUM_HWIFS 2
37 #define CATWEASEL_NUM_HWIFS 3
38 #define XSURF_NUM_HWIFS 2
41 * Bases of the IDE interfaces (relative to the board address)
44 #define BUDDHA_BASE1 0x800
45 #define BUDDHA_BASE2 0xa00
46 #define BUDDHA_BASE3 0xc00
48 #define XSURF_BASE1 0xb000 /* 2.5" Interface */
49 #define XSURF_BASE2 0xd000 /* 3.5" Interface */
51 static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
52 BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
55 static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
56 XSURF_BASE1, XSURF_BASE2
61 * Offsets from one of the above bases
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) */
75 static 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
80 static 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
86 * Other registers
89 #define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
90 #define BUDDHA_IRQ2 0xf40 /* interrupt */
91 #define BUDDHA_IRQ3 0xf80
93 #define XSURF_IRQ1 0x7e
94 #define XSURF_IRQ2 0x7e
96 static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
97 BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
100 static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
101 XSURF_IRQ1, XSURF_IRQ2
104 #define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
108 * Board information
111 typedef enum BuddhaType_Enum {
112 BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
113 } BuddhaType;
117 * Check and acknowledge the interrupt status
120 static int buddha_ack_intr(ide_hwif_t *hwif)
122 unsigned char ch;
124 ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
125 if (!(ch & 0x80))
126 return 0;
127 return 1;
130 static int xsurf_ack_intr(ide_hwif_t *hwif)
132 unsigned char ch;
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;
143 * Probe for a Buddha or Catweasel IDE interface
146 void __init buddha_init(void)
148 hw_regs_t hw;
149 ide_hwif_t *hwif;
150 int i, index;
152 struct zorro_dev *z = NULL;
153 u_long buddha_board = 0;
154 BuddhaType type;
155 int buddha_num_hwifs;
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;
171 board = z->resource.start;
174 * FIXME: we now have selectable mmio v/s iomio transports.
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);
187 fail_base2:
188 release_mem_region(board+XSURF_BASE1, 0x1000);
189 continue;
192 buddha_board = ZTWO_VADDR(board);
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);
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);
216 index = ide_register_hw(&hw, 1, &hwif);
217 if (index != -1) {
218 hwif->mmio = 1;
219 printk("ide%d: ", index);
220 switch(type) {
221 case BOARD_BUDDHA:
222 printk("Buddha");
223 break;
224 case BOARD_CATWEASEL:
225 printk("Catweasel");
226 break;
227 case BOARD_XSURF:
228 printk("X-Surf");
229 break;
231 printk(" IDE interface\n");