]>
Commit | Line | Data |
---|---|---|
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 | #include <linux/module.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 | #define MAX_NUM_HWIFS 3 | |
41 | ||
42 | /* | |
43 | * Bases of the IDE interfaces (relative to the board address) | |
44 | */ | |
45 | ||
46 | #define BUDDHA_BASE1 0x800 | |
47 | #define BUDDHA_BASE2 0xa00 | |
48 | #define BUDDHA_BASE3 0xc00 | |
49 | ||
50 | #define XSURF_BASE1 0xb000 /* 2.5" Interface */ | |
51 | #define XSURF_BASE2 0xd000 /* 3.5" Interface */ | |
52 | ||
53 | static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = { | |
54 | BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3 | |
55 | }; | |
56 | ||
57 | static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = { | |
58 | XSURF_BASE1, XSURF_BASE2 | |
59 | }; | |
60 | ||
61 | /* | |
62 | * Offsets from one of the above bases | |
63 | */ | |
64 | ||
65 | #define BUDDHA_CONTROL 0x11a | |
66 | ||
67 | /* | |
68 | * Other registers | |
69 | */ | |
70 | ||
71 | #define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */ | |
72 | #define BUDDHA_IRQ2 0xf40 /* interrupt */ | |
73 | #define BUDDHA_IRQ3 0xf80 | |
74 | ||
75 | #define XSURF_IRQ1 0x7e | |
76 | #define XSURF_IRQ2 0x7e | |
77 | ||
78 | static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = { | |
79 | BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3 | |
80 | }; | |
81 | ||
82 | static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = { | |
83 | XSURF_IRQ1, XSURF_IRQ2 | |
84 | }; | |
85 | ||
86 | #define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */ | |
87 | ||
88 | ||
89 | /* | |
90 | * Board information | |
91 | */ | |
92 | ||
93 | typedef enum BuddhaType_Enum { | |
94 | BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF | |
95 | } BuddhaType; | |
96 | ||
97 | static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" }; | |
98 | ||
99 | /* | |
100 | * Check and acknowledge the interrupt status | |
101 | */ | |
102 | ||
103 | static int buddha_test_irq(ide_hwif_t *hwif) | |
104 | { | |
105 | unsigned char ch; | |
106 | ||
107 | ch = z_readb(hwif->io_ports.irq_addr); | |
108 | if (!(ch & 0x80)) | |
109 | return 0; | |
110 | return 1; | |
111 | } | |
112 | ||
113 | static void xsurf_clear_irq(ide_drive_t *drive) | |
114 | { | |
115 | /* | |
116 | * X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0 | |
117 | */ | |
118 | z_writeb(0, drive->hwif->io_ports.irq_addr); | |
119 | } | |
120 | ||
121 | static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base, | |
122 | unsigned long ctl, unsigned long irq_port) | |
123 | { | |
124 | int i; | |
125 | ||
126 | memset(hw, 0, sizeof(*hw)); | |
127 | ||
128 | hw->io_ports.data_addr = base; | |
129 | ||
130 | for (i = 1; i < 8; i++) | |
131 | hw->io_ports_array[i] = base + 2 + i * 4; | |
132 | ||
133 | hw->io_ports.ctl_addr = ctl; | |
134 | hw->io_ports.irq_addr = irq_port; | |
135 | ||
136 | hw->irq = IRQ_AMIGA_PORTS; | |
137 | } | |
138 | ||
139 | static const struct ide_port_ops buddha_port_ops = { | |
140 | .test_irq = buddha_test_irq, | |
141 | }; | |
142 | ||
143 | static const struct ide_port_ops xsurf_port_ops = { | |
144 | .clear_irq = xsurf_clear_irq, | |
145 | .test_irq = buddha_test_irq, | |
146 | }; | |
147 | ||
148 | static const struct ide_port_info buddha_port_info = { | |
149 | .port_ops = &buddha_port_ops, | |
150 | .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA, | |
151 | .irq_flags = IRQF_SHARED, | |
152 | .chipset = ide_generic, | |
153 | }; | |
154 | ||
155 | /* | |
156 | * Probe for a Buddha or Catweasel IDE interface | |
157 | */ | |
158 | ||
159 | static int __init buddha_init(void) | |
160 | { | |
161 | struct zorro_dev *z = NULL; | |
162 | u_long buddha_board = 0; | |
163 | BuddhaType type; | |
164 | int buddha_num_hwifs, i; | |
165 | ||
166 | while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { | |
167 | unsigned long board; | |
168 | struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS]; | |
169 | struct ide_port_info d = buddha_port_info; | |
170 | ||
171 | if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) { | |
172 | buddha_num_hwifs = BUDDHA_NUM_HWIFS; | |
173 | type=BOARD_BUDDHA; | |
174 | } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) { | |
175 | buddha_num_hwifs = CATWEASEL_NUM_HWIFS; | |
176 | type=BOARD_CATWEASEL; | |
177 | } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) { | |
178 | buddha_num_hwifs = XSURF_NUM_HWIFS; | |
179 | type=BOARD_XSURF; | |
180 | d.port_ops = &xsurf_port_ops; | |
181 | } else | |
182 | continue; | |
183 | ||
184 | board = z->resource.start; | |
185 | ||
186 | if(type != BOARD_XSURF) { | |
187 | if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE")) | |
188 | continue; | |
189 | } else { | |
190 | if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE")) | |
191 | continue; | |
192 | if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE")) | |
193 | goto fail_base2; | |
194 | if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) { | |
195 | release_mem_region(board+XSURF_BASE2, 0x1000); | |
196 | fail_base2: | |
197 | release_mem_region(board+XSURF_BASE1, 0x1000); | |
198 | continue; | |
199 | } | |
200 | } | |
201 | buddha_board = (unsigned long)ZTWO_VADDR(board); | |
202 | ||
203 | /* write to BUDDHA_IRQ_MR to enable the board IRQ */ | |
204 | /* X-Surf doesn't have this. IRQs are always on */ | |
205 | if (type != BOARD_XSURF) | |
206 | z_writeb(0, buddha_board+BUDDHA_IRQ_MR); | |
207 | ||
208 | printk(KERN_INFO "ide: %s IDE controller\n", | |
209 | buddha_board_name[type]); | |
210 | ||
211 | for (i = 0; i < buddha_num_hwifs; i++) { | |
212 | unsigned long base, ctl, irq_port; | |
213 | ||
214 | if (type != BOARD_XSURF) { | |
215 | base = buddha_board + buddha_bases[i]; | |
216 | ctl = base + BUDDHA_CONTROL; | |
217 | irq_port = buddha_board + buddha_irqports[i]; | |
218 | } else { | |
219 | base = buddha_board + xsurf_bases[i]; | |
220 | /* X-Surf has no CS1* (Control/AltStat) */ | |
221 | ctl = 0; | |
222 | irq_port = buddha_board + xsurf_irqports[i]; | |
223 | } | |
224 | ||
225 | buddha_setup_ports(&hw[i], base, ctl, irq_port); | |
226 | ||
227 | hws[i] = &hw[i]; | |
228 | } | |
229 | ||
230 | ide_host_add(&d, hws, i, NULL); | |
231 | } | |
232 | ||
233 | return 0; | |
234 | } | |
235 | ||
236 | module_init(buddha_init); | |
237 | ||
238 | MODULE_LICENSE("GPL"); |