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/ide.h>
18 #include <linux/module.h>
19
20 #include <asm/ide.h>
21
22 /*
23 * Bases of the IDE interfaces
24 */
25
26 #define Q40IDE_NUM_HWIFS 2
27
28 #define PCIDE_BASE1 0x1f0
29 #define PCIDE_BASE2 0x170
30 #define PCIDE_BASE3 0x1e8
31 #define PCIDE_BASE4 0x168
32 #define PCIDE_BASE5 0x1e0
33 #define PCIDE_BASE6 0x160
34
35 static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
36 PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4 , PCIDE_BASE5,
37 PCIDE_BASE6 */
38 };
39
q40ide_default_irq(unsigned long base)40 static int q40ide_default_irq(unsigned long base)
41 {
42 switch (base) {
43 case 0x1f0: return 14;
44 case 0x170: return 15;
45 case 0x1e8: return 11;
46 default:
47 return 0;
48 }
49 }
50
51
52 /*
53 * Addresses are pretranslated for Q40 ISA access.
54 */
q40_ide_setup_ports(struct ide_hw * hw,unsigned long base,int irq)55 static void q40_ide_setup_ports(struct ide_hw *hw, unsigned long base, int irq)
56 {
57 memset(hw, 0, sizeof(*hw));
58 /* BIG FAT WARNING:
59 assumption: only DATA port is ever used in 16 bit mode */
60 hw->io_ports.data_addr = Q40_ISA_IO_W(base);
61 hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1);
62 hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2);
63 hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3);
64 hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4);
65 hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5);
66 hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6);
67 hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7);
68 hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
69
70 hw->irq = irq;
71 }
72
q40ide_input_data(ide_drive_t * drive,struct ide_cmd * cmd,void * buf,unsigned int len)73 static void q40ide_input_data(ide_drive_t *drive, struct ide_cmd *cmd,
74 void *buf, unsigned int len)
75 {
76 unsigned long data_addr = drive->hwif->io_ports.data_addr;
77
78 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
79 __ide_mm_insw(data_addr, buf, (len + 1) / 2);
80 return;
81 }
82
83 raw_insw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
84 }
85
q40ide_output_data(ide_drive_t * drive,struct ide_cmd * cmd,void * buf,unsigned int len)86 static void q40ide_output_data(ide_drive_t *drive, struct ide_cmd *cmd,
87 void *buf, unsigned int len)
88 {
89 unsigned long data_addr = drive->hwif->io_ports.data_addr;
90
91 if (drive->media == ide_disk && cmd && (cmd->tf_flags & IDE_TFLAG_FS)) {
92 __ide_mm_outsw(data_addr, buf, (len + 1) / 2);
93 return;
94 }
95
96 raw_outsw_swapw((u16 *)data_addr, buf, (len + 1) / 2);
97 }
98
99 /* Q40 has a byte-swapped IDE interface */
100 static const struct ide_tp_ops q40ide_tp_ops = {
101 .exec_command = ide_exec_command,
102 .read_status = ide_read_status,
103 .read_altstatus = ide_read_altstatus,
104 .write_devctl = ide_write_devctl,
105
106 .dev_select = ide_dev_select,
107 .tf_load = ide_tf_load,
108 .tf_read = ide_tf_read,
109
110 .input_data = q40ide_input_data,
111 .output_data = q40ide_output_data,
112 };
113
114 static const struct ide_port_info q40ide_port_info = {
115 .tp_ops = &q40ide_tp_ops,
116 .host_flags = IDE_HFLAG_MMIO | IDE_HFLAG_NO_DMA,
117 .irq_flags = IRQF_SHARED,
118 .chipset = ide_generic,
119 };
120
121 /*
122 * the static array is needed to have the name reported in /proc/ioports,
123 * hwif->name unfortunately isn't available yet
124 */
125 static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
126 "ide0", "ide1"
127 };
128
129 /*
130 * Probe for Q40 IDE interfaces
131 */
132
q40ide_init(void)133 static int __init q40ide_init(void)
134 {
135 int i;
136 struct ide_hw hw[Q40IDE_NUM_HWIFS], *hws[] = { NULL, NULL };
137
138 if (!MACH_IS_Q40)
139 return -ENODEV;
140
141 printk(KERN_INFO "ide: Q40 IDE controller\n");
142
143 for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
144 const char *name = q40_ide_names[i];
145
146 if (!request_region(pcide_bases[i], 8, name)) {
147 printk("could not reserve ports %lx-%lx for %s\n",
148 pcide_bases[i],pcide_bases[i]+8,name);
149 continue;
150 }
151 if (!request_region(pcide_bases[i]+0x206, 1, name)) {
152 printk("could not reserve port %lx for %s\n",
153 pcide_bases[i]+0x206,name);
154 release_region(pcide_bases[i], 8);
155 continue;
156 }
157 q40_ide_setup_ports(&hw[i], pcide_bases[i],
158 q40ide_default_irq(pcide_bases[i]));
159
160 hws[i] = &hw[i];
161 }
162
163 return ide_host_add(&q40ide_port_info, hws, Q40IDE_NUM_HWIFS, NULL);
164 }
165
166 module_init(q40ide_init);
167
168 MODULE_LICENSE("GPL");
169