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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 = 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"); |
239 |
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