x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / ide / buddha.c
blobab4f169d08373bf0f328e4ce68f07ccef20e8478
1 /*
2 * 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/zorro.h>
24 #include <linux/ide.h>
25 #include <linux/init.h>
27 #include <asm/amigahw.h>
28 #include <asm/amigaints.h>
32 * The Buddha has 2 IDE interfaces, the Catweasel has 3, X-Surf has 2
35 #define BUDDHA_NUM_HWIFS 2
36 #define CATWEASEL_NUM_HWIFS 3
37 #define XSURF_NUM_HWIFS 2
39 #define MAX_NUM_HWIFS 3
42 * Bases of the IDE interfaces (relative to the board address)
45 #define BUDDHA_BASE1 0x800
46 #define BUDDHA_BASE2 0xa00
47 #define BUDDHA_BASE3 0xc00
49 #define XSURF_BASE1 0xb000 /* 2.5" Interface */
50 #define XSURF_BASE2 0xd000 /* 3.5" Interface */
52 static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
53 BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
56 static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
57 XSURF_BASE1, XSURF_BASE2
61 * Offsets from one of the above bases
64 #define BUDDHA_CONTROL 0x11a
67 * Other registers
70 #define BUDDHA_IRQ1 0xf00 /* MSB = 1, Harddisk is source of */
71 #define BUDDHA_IRQ2 0xf40 /* interrupt */
72 #define BUDDHA_IRQ3 0xf80
74 #define XSURF_IRQ1 0x7e
75 #define XSURF_IRQ2 0x7e
77 static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
78 BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
81 static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
82 XSURF_IRQ1, XSURF_IRQ2
85 #define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
89 * Board information
92 typedef enum BuddhaType_Enum {
93 BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
94 } BuddhaType;
96 static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
99 * Check and acknowledge the interrupt status
102 static int buddha_test_irq(ide_hwif_t *hwif)
104 unsigned char ch;
106 ch = z_readb(hwif->io_ports.irq_addr);
107 if (!(ch & 0x80))
108 return 0;
109 return 1;
112 static void xsurf_clear_irq(ide_drive_t *drive)
115 * X-Surf needs 0 written to IRQ register to ensure ISA bit A11 stays at 0
117 z_writeb(0, drive->hwif->io_ports.irq_addr);
120 static void __init buddha_setup_ports(struct ide_hw *hw, unsigned long base,
121 unsigned long ctl, unsigned long irq_port)
123 int i;
125 memset(hw, 0, sizeof(*hw));
127 hw->io_ports.data_addr = base;
129 for (i = 1; i < 8; i++)
130 hw->io_ports_array[i] = base + 2 + i * 4;
132 hw->io_ports.ctl_addr = ctl;
133 hw->io_ports.irq_addr = irq_port;
135 hw->irq = IRQ_AMIGA_PORTS;
138 static const struct ide_port_ops buddha_port_ops = {
139 .test_irq = buddha_test_irq,
142 static const struct ide_port_ops xsurf_port_ops = {
143 .clear_irq = xsurf_clear_irq,
144 .test_irq = buddha_test_irq,
147 static const struct ide_port_info buddha_port_info = {
148 .port_ops = &buddha_port_ops,
149 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
150 .irq_flags = IRQF_SHARED,
151 .chipset = ide_generic,
155 * Probe for a Buddha or Catweasel IDE interface
158 static int __init buddha_init(void)
160 struct zorro_dev *z = NULL;
161 u_long buddha_board = 0;
162 BuddhaType type;
163 int buddha_num_hwifs, i;
165 while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
166 unsigned long board;
167 struct ide_hw hw[MAX_NUM_HWIFS], *hws[MAX_NUM_HWIFS];
168 struct ide_port_info d = buddha_port_info;
170 if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
171 buddha_num_hwifs = BUDDHA_NUM_HWIFS;
172 type=BOARD_BUDDHA;
173 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
174 buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
175 type=BOARD_CATWEASEL;
176 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
177 buddha_num_hwifs = XSURF_NUM_HWIFS;
178 type=BOARD_XSURF;
179 d.port_ops = &xsurf_port_ops;
180 } else
181 continue;
183 board = z->resource.start;
185 if(type != BOARD_XSURF) {
186 if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
187 continue;
188 } else {
189 if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
190 continue;
191 if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
192 goto fail_base2;
193 if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
194 release_mem_region(board+XSURF_BASE2, 0x1000);
195 fail_base2:
196 release_mem_region(board+XSURF_BASE1, 0x1000);
197 continue;
200 buddha_board = ZTWO_VADDR(board);
202 /* write to BUDDHA_IRQ_MR to enable the board IRQ */
203 /* X-Surf doesn't have this. IRQs are always on */
204 if (type != BOARD_XSURF)
205 z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
207 printk(KERN_INFO "ide: %s IDE controller\n",
208 buddha_board_name[type]);
210 for (i = 0; i < buddha_num_hwifs; i++) {
211 unsigned long base, ctl, irq_port;
213 if (type != BOARD_XSURF) {
214 base = buddha_board + buddha_bases[i];
215 ctl = base + BUDDHA_CONTROL;
216 irq_port = buddha_board + buddha_irqports[i];
217 } else {
218 base = buddha_board + xsurf_bases[i];
219 /* X-Surf has no CS1* (Control/AltStat) */
220 ctl = 0;
221 irq_port = buddha_board + xsurf_irqports[i];
224 buddha_setup_ports(&hw[i], base, ctl, irq_port);
226 hws[i] = &hw[i];
229 ide_host_add(&d, hws, i, NULL);
232 return 0;
235 module_init(buddha_init);
237 MODULE_LICENSE("GPL");