ide: add struct ide_port_info instances to legacy host drivers
[linux-2.6] / drivers / ide / legacy / buddha.c
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/hdreg.h>
24 #include <linux/zorro.h>
25 #include <linux/ide.h>
26 #include <linux/init.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     /*
41      *  Bases of the IDE interfaces (relative to the board address)
42      */
43
44 #define BUDDHA_BASE1    0x800
45 #define BUDDHA_BASE2    0xa00
46 #define BUDDHA_BASE3    0xc00
47
48 #define XSURF_BASE1     0xb000 /* 2.5" Interface */
49 #define XSURF_BASE2     0xd000 /* 3.5" Interface */
50
51 static u_int buddha_bases[CATWEASEL_NUM_HWIFS] __initdata = {
52     BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
53 };
54
55 static u_int xsurf_bases[XSURF_NUM_HWIFS] __initdata = {
56      XSURF_BASE1, XSURF_BASE2
57 };
58
59
60     /*
61      *  Offsets from one of the above bases
62      */
63
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) */
74
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
78 };
79
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
83 };
84
85     /*
86      *  Other registers
87      */
88
89 #define BUDDHA_IRQ1     0xf00           /* MSB = 1, Harddisk is source of */
90 #define BUDDHA_IRQ2     0xf40           /* interrupt */
91 #define BUDDHA_IRQ3     0xf80
92
93 #define XSURF_IRQ1      0x7e
94 #define XSURF_IRQ2      0x7e
95
96 static int buddha_irqports[CATWEASEL_NUM_HWIFS] __initdata = {
97     BUDDHA_IRQ1, BUDDHA_IRQ2, BUDDHA_IRQ3
98 };
99
100 static int xsurf_irqports[XSURF_NUM_HWIFS] __initdata = {
101     XSURF_IRQ1, XSURF_IRQ2
102 };
103
104 #define BUDDHA_IRQ_MR   0xfc0           /* master interrupt enable */
105
106
107     /*
108      *  Board information
109      */
110
111 typedef enum BuddhaType_Enum {
112     BOARD_BUDDHA, BOARD_CATWEASEL, BOARD_XSURF
113 } BuddhaType;
114
115 static const char *buddha_board_name[] = { "Buddha", "Catweasel", "X-Surf" };
116
117     /*
118      *  Check and acknowledge the interrupt status
119      */
120
121 static int buddha_ack_intr(ide_hwif_t *hwif)
122 {
123     unsigned char ch;
124
125     ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
126     if (!(ch & 0x80))
127             return 0;
128     return 1;
129 }
130
131 static int xsurf_ack_intr(ide_hwif_t *hwif)
132 {
133     unsigned char ch;
134
135     ch = z_readb(hwif->io_ports[IDE_IRQ_OFFSET]);
136     /* X-Surf needs a 0 written to IRQ register to ensure ISA bit A11 stays at 0 */
137     z_writeb(0, hwif->io_ports[IDE_IRQ_OFFSET]); 
138     if (!(ch & 0x80))
139             return 0;
140     return 1;
141 }
142
143     /*
144      *  Probe for a Buddha or Catweasel IDE interface
145      */
146
147 static int __init buddha_init(void)
148 {
149         hw_regs_t hw;
150         ide_hwif_t *hwif;
151         int i;
152
153         struct zorro_dev *z = NULL;
154         u_long buddha_board = 0;
155         BuddhaType type;
156         int buddha_num_hwifs;
157
158         while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
159                 unsigned long board;
160                 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
161
162                 if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
163                         buddha_num_hwifs = BUDDHA_NUM_HWIFS;
164                         type=BOARD_BUDDHA;
165                 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
166                         buddha_num_hwifs = CATWEASEL_NUM_HWIFS;
167                         type=BOARD_CATWEASEL;
168                 } else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
169                         buddha_num_hwifs = XSURF_NUM_HWIFS;
170                         type=BOARD_XSURF;
171                 } else 
172                         continue;
173                 
174                 board = z->resource.start;
175
176 /*
177  * FIXME: we now have selectable mmio v/s iomio transports.
178  */
179
180                 if(type != BOARD_XSURF) {
181                         if (!request_mem_region(board+BUDDHA_BASE1, 0x800, "IDE"))
182                                 continue;
183                 } else {
184                         if (!request_mem_region(board+XSURF_BASE1, 0x1000, "IDE"))
185                                 continue;
186                         if (!request_mem_region(board+XSURF_BASE2, 0x1000, "IDE"))
187                                 goto fail_base2;
188                         if (!request_mem_region(board+XSURF_IRQ1, 0x8, "IDE")) {
189                                 release_mem_region(board+XSURF_BASE2, 0x1000);
190 fail_base2:
191                                 release_mem_region(board+XSURF_BASE1, 0x1000);
192                                 continue;
193                         }
194                 }         
195                 buddha_board = ZTWO_VADDR(board);
196                 
197                 /* write to BUDDHA_IRQ_MR to enable the board IRQ */
198                 /* X-Surf doesn't have this.  IRQs are always on */
199                 if (type != BOARD_XSURF)
200                         z_writeb(0, buddha_board+BUDDHA_IRQ_MR);
201
202                 printk(KERN_INFO "ide: %s IDE controller\n",
203                                  buddha_board_name[type]);
204
205                 for(i=0;i<buddha_num_hwifs;i++) {
206                         if(type != BOARD_XSURF) {
207                                 ide_setup_ports(&hw, (buddha_board+buddha_bases[i]),
208                                                 buddha_offsets, 0,
209                                                 (buddha_board+buddha_irqports[i]),
210                                                 buddha_ack_intr,
211 //                                              budda_iops,
212                                                 IRQ_AMIGA_PORTS);
213                         } else {
214                                 ide_setup_ports(&hw, (buddha_board+xsurf_bases[i]),
215                                                 xsurf_offsets, 0,
216                                                 (buddha_board+xsurf_irqports[i]),
217                                                 xsurf_ack_intr,
218 //                                              xsurf_iops,
219                                                 IRQ_AMIGA_PORTS);
220                         }       
221
222                         hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
223                         if (hwif) {
224                                 u8 index = hwif->index;
225
226                                 ide_init_port_data(hwif, index);
227                                 ide_init_port_hw(hwif, &hw);
228
229                                 hwif->mmio = 1;
230
231                                 idx[i] = index;
232                         }
233                 }
234
235                 ide_device_add(idx, NULL);
236         }
237
238         return 0;
239 }
240
241 module_init(buddha_init);