1 /*
2 * 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/zorro.h>
24 #include <linux/ide.h>
25 #include <linux/init.h>
26
27 #include <asm/amigahw.h>
28 #include <asm/amigaints.h>
29
30
31 /*
32 * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
33 */
34
35 #define BUDDHA_NUM_HWIFS 2
36 #define CATWEASEL_NUM_HWIFS 3
37 #define XSURF_NUM_HWIFS 2
38
39 #define MAX_NUM_HWIFS 3
40
41 /*
42 * Bases of the IDE interfaces (relative to the board address)
43 */
44
45 #define BUDDHA_BASE1 0x800
46 #define BUDDHA_BASE2 0xa00
47 #define BUDDHA_BASE3 0xc00
48
49 #define XSURF_BASE1 0xb000 /* 2.5" Interface */
50 #define XSURF_BASE2 0xd000 /* 3.5" Interface */
51
52 static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
53 BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
54 };
55
56 static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
57 XSURF_BASE1, XSURF_BASE2
58 };
59
60 /*
61 * Offsets from one of the above bases
62 */
63
64 #define BUDDHA_CONTROL 0x11a
65
66 /*
67 * Other registers
68 */
69
70 #define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
71 #define BUDDHA_IRQ2 0xf40 /* interrupt */
72 #define BUDDHA_IRQ3 0xf80
73
74 #define XSURF_IRQ1 0x7e
75 #define XSURF_IRQ2 0x7e
76
77 static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
78 BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
79 };
80
81 static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
82 XSURF_IRQ1, XSURF_IRQ2
83 };
84
85 #define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
86
87
88 /*
89 * Board information
90 */
91
92 typedef enum BuddhaType_Enum {
93 BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
94 } BuddhaType;
95
96 static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
97
98 /*
99 * Check and acknowledge the interrupt status
100 */
101
buddha_ack_intr(ide_hwif_t * hwif)102 static int buddha_ack_intr(ide_hwif_t *hwif)
103 {
104 unsigned char ch;
105
106 ch = z_readb(hwif->io_ports.irq_addr);
107 if (!(ch & 0x80))
108 return 0;
109 return 1;
110 }
111
xsurf_ack_intr(ide_hwif_t * hwif)112 static int xsurf_ack_intr(ide_hwif_t *hwif)
113 {
114 unsigned char ch;
115
116 ch = z_readb(hwif->io_ports.irq_addr);
117 /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
118 z_writeb(0, hwif->io_ports.irq_addr);
119 if (!(ch & 0x80))
120 return 0;
121 return 1;
122 }
123
buddha_setup_ports(hw_regs_t * hw,unsigned long base,unsigned long ctl,unsigned long irq_port,ide_ack_intr_t * ack_intr)124 static void __init buddha_setup_ports(hw_regs_t *hw, unsigned long base,
125 unsigned long ctl, unsigned long irq_port,
126 ide_ack_intr_t *ack_intr)
127 {
128 int i;
129
130 memset(hw, 0, sizeof(*hw));
131
132 hw->io_ports.data_addr = base;
133
134 for (i = 1; i < 8; i++)
135 hw->io_ports_array[i] = base + 2 + i * 4;
136
137 hw->io_ports.ctl_addr = ctl;
138 hw->io_ports.irq_addr = irq_port;
139
140 hw->irq = IRQ_AMIGA_PORTS;
141 hw->ack_intr = ack_intr;
142
143 hw->chipset = ide_generic;
144 }
145
146 /*
147 * Probe for a Buddha or Catweasel IDE interface
148 */
149
buddha_init(void)150 static int __init buddha_init(void)
151 {
152 struct zorro_dev *z = NULL;
153 u_long buddha_board = 0;
154 BuddhaType type;
155 int buddha_num_hwifs, i;
156
157 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
158 unsigned long board;
159 hw_regs_t hw[MAX_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
160
161 if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
162 buddha_num_hwifs = BUDDHA_NUM_HWIFS;
163 type=BOARD_BUDDHA;
164 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
165 buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
166 type=BOARD_CATWEASEL;
167 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
168 buddha_num_hwifs = XSURF_NUM_HWIFS;
169 type=BOARD_XSURF;
170 } else
171 continue;
172
173 board = z->resource.start;
174
175 /*
176 * FIXME: we now have selectable mmio v/s iomio transports.
177 */
178
179 if(type != BOARD_XSURF) {
180 if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
181 continue;
182 } else {
183 if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
184 continue;
185 if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
186 goto fail_base2;
187 if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
188 release_mem_region(board+XSURF_BASE2, 0x1000);
189 fail_base2:
190 release_mem_region(board+XSURF_BASE1, 0x1000);
191 continue;
192 }
193 }
194 buddha_board = ZTWO_VADDR(board);
195
196 /* write to BUDDHA_IRQ_MR to enable the board IRQ */
197 /* X-Surf doesn't have this. IRQs are always on */
198 if (type != BOARD_XSURF)
199 z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
200
201 printk(KERN_INFO "ide: %s IDE controller\n",
202 buddha_board_name[type]);
203
204 for (i = 0; i < buddha_num_hwifs; i++) {
205 unsigned long base, ctl, irq_port;
206 ide_ack_intr_t *ack_intr;
207
208 if (type != BOARD_XSURF) {
209 base = buddha_board + buddha_bases[i];
210 ctl = base + BUDDHA_CONTROL;
211 irq_port = buddha_board + buddha_irqports[i];
212 ack_intr = buddha_ack_intr;
213 } else {
214 base = buddha_board + xsurf_bases[i];
215 /* X-Surf has no CS1* (Control/AltStat) */
216 ctl = 0;
217 irq_port = buddha_board + xsurf_irqports[i];
218 ack_intr = xsurf_ack_intr;
219 }
220
221 buddha_setup_ports(&hw[i], base, ctl, irq_port,
222 ack_intr);
223
224 hws[i] = &hw[i];
225 }
226
227 ide_host_add(NULL, hws, NULL);
228 }
229
230 return 0;
231 }
232
233 module_init(buddha_init);
234
235 MODULE_LICENSE("GPL");
236