tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Q40 I/O port IDE Driver
3 *
4 * (c) Richard Zidlicky
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 *
10 *
11 */
12
13#include <linux/types.h>
14#include <linux/mm.h>
15#include <linux/interrupt.h>
16#include <linux/blkdev.h>
17#include <linux/hdreg.h>
18
19#include <linux/ide.h>
20
21 /*
22 * Bases of the IDE interfaces
23 */
24
25#define Q40IDE_NUM_HWIFS 2
26
27#define PCIDE_BASE1 0x1f0
28#define PCIDE_BASE2 0x170
29#define PCIDE_BASE3 0x1e8
30#define PCIDE_BASE4 0x168
31#define PCIDE_BASE5 0x1e0
32#define PCIDE_BASE6 0x160
33
34static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
35 PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4 , PCIDE_BASE5,
36 PCIDE_BASE6 */
37};
38
39static int q40ide_default_irq(unsigned long base)
40{
41 switch (base) {
42 case 0x1f0: return 14;
43 case 0x170: return 15;
44 case 0x1e8: return 11;
45 default:
46 return 0;
47 }
48}
49
50
51/*
52 * Addresses are pretranslated for Q40 ISA access.
53 */
54static void q40_ide_setup_ports(hw_regs_t *hw, unsigned long base,
55 ide_ack_intr_t *ack_intr,
56 int irq)
57{
58 memset(hw, 0, sizeof(hw_regs_t));
59 /* BIG FAT WARNING:
60 assumption: only DATA port is ever used in 16 bit mode */
61 hw->io_ports.data_addr = Q40_ISA_IO_W(base);
62 hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1);
63 hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2);
64 hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3);
65 hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4);
66 hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5);
67 hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6);
68 hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7);
69 hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
70
71 hw->irq = irq;
72 hw->ack_intr = ack_intr;
73
74 hw->chipset = ide_generic;
75}
76
77static void q40ide_input_data(ide_drive_t *drive, struct request *rq,
78 void *buf, unsigned int len)
79{
80 unsigned long data_addr = drive->hwif->io_ports.data_addr;
81
82 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
83 return insw(data_addr, buf, (len + 1) / 2);
84
85 insw_swapw(data_addr, buf, (len + 1) / 2);
86}
87
88static void q40ide_output_data(ide_drive_t *drive, struct request *rq,
89 void *buf, unsigned int len)
90{
91 unsigned long data_addr = drive->hwif->io_ports.data_addr;
92
93 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
94 return outsw(data_addr, buf, (len + 1) / 2);
95
96 outsw_swapw(data_addr, buf, (len + 1) / 2);
97}
98
99/*
100 * the static array is needed to have the name reported in /proc/ioports,
101 * hwif->name unfortunately isn't available yet
102 */
103static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
104 "ide0", "ide1"
105};
106
107/*
108 * Probe for Q40 IDE interfaces
109 */
110
111static int __init q40ide_init(void)
112{
113 int i;
114 ide_hwif_t *hwif;
115 const char *name;
116 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
117
118 if (!MACH_IS_Q40)
119 return -ENODEV;
120
121 printk(KERN_INFO "ide: Q40 IDE controller\n");
122
123 for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
124 hw_regs_t hw;
125
126 name = q40_ide_names[i];
127 if (!request_region(pcide_bases[i], 8, name)) {
128 printk("could not reserve ports %lx-%lx for %s\n",
129 pcide_bases[i],pcide_bases[i]+8,name);
130 continue;
131 }
132 if (!request_region(pcide_bases[i]+0x206, 1, name)) {
133 printk("could not reserve port %lx for %s\n",
134 pcide_bases[i]+0x206,name);
135 release_region(pcide_bases[i], 8);
136 continue;
137 }
138 q40_ide_setup_ports(&hw, pcide_bases[i],
139 NULL,
140// m68kide_iops,
141 q40ide_default_irq(pcide_bases[i]));
142
143 hwif = ide_find_port();
144 if (hwif) {
145 ide_init_port_data(hwif, hwif->index);
146 ide_init_port_hw(hwif, &hw);
147
148 /* Q40 has a byte-swapped IDE interface */
149 hwif->input_data = q40ide_input_data;
150 hwif->output_data = q40ide_output_data;
151
152 idx[i] = hwif->index;
153 }
154 }
155
156 ide_device_add(idx, NULL);
157
158 return 0;
159}
160
161module_init(q40ide_init);
162
163MODULE_LICENSE("GPL");