target: Fix >= v3.9+ regression in PR APTPL + ALUA metadata write-out
[linux-3.10.git] / drivers / ide / 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/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");