2 * Q40 I/O port IDE Driver
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
13 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/blkdev.h>
17 #include <linux/ide.h>
20 * Bases of the IDE interfaces
23 #define Q40IDE_NUM_HWIFS 2
25 #define PCIDE_BASE1 0x1f0
26 #define PCIDE_BASE2 0x170
27 #define PCIDE_BASE3 0x1e8
28 #define PCIDE_BASE4 0x168
29 #define PCIDE_BASE5 0x1e0
30 #define PCIDE_BASE6 0x160
32 static const unsigned long pcide_bases[Q40IDE_NUM_HWIFS] = {
33 PCIDE_BASE1, PCIDE_BASE2, /* PCIDE_BASE3, PCIDE_BASE4 , PCIDE_BASE5,
37 static int q40ide_default_irq(unsigned long base)
40 case 0x1f0: return 14;
41 case 0x170: return 15;
42 case 0x1e8: return 11;
50 * Addresses are pretranslated for Q40 ISA access.
52 static void q40_ide_setup_ports(hw_regs_t *hw, unsigned long base,
53 ide_ack_intr_t *ack_intr,
56 memset(hw, 0, sizeof(hw_regs_t));
58 assumption: only DATA port is ever used in 16 bit mode */
59 hw->io_ports.data_addr = Q40_ISA_IO_W(base);
60 hw->io_ports.error_addr = Q40_ISA_IO_B(base + 1);
61 hw->io_ports.nsect_addr = Q40_ISA_IO_B(base + 2);
62 hw->io_ports.lbal_addr = Q40_ISA_IO_B(base + 3);
63 hw->io_ports.lbam_addr = Q40_ISA_IO_B(base + 4);
64 hw->io_ports.lbah_addr = Q40_ISA_IO_B(base + 5);
65 hw->io_ports.device_addr = Q40_ISA_IO_B(base + 6);
66 hw->io_ports.status_addr = Q40_ISA_IO_B(base + 7);
67 hw->io_ports.ctl_addr = Q40_ISA_IO_B(base + 0x206);
70 hw->ack_intr = ack_intr;
72 hw->chipset = ide_generic;
75 static void q40ide_input_data(ide_drive_t *drive, struct request *rq,
76 void *buf, unsigned int len)
78 unsigned long data_addr = drive->hwif->io_ports.data_addr;
80 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
81 return insw(data_addr, buf, (len + 1) / 2);
83 insw_swapw(data_addr, buf, (len + 1) / 2);
86 static void q40ide_output_data(ide_drive_t *drive, struct request *rq,
87 void *buf, unsigned int len)
89 unsigned long data_addr = drive->hwif->io_ports.data_addr;
91 if (drive->media == ide_disk && rq && rq->cmd_type == REQ_TYPE_FS)
92 return outsw(data_addr, buf, (len + 1) / 2);
94 outsw_swapw(data_addr, buf, (len + 1) / 2);
97 /* Q40 has a byte-swapped IDE interface */
98 static const struct ide_tp_ops q40ide_tp_ops = {
99 .exec_command = ide_exec_command,
100 .read_status = ide_read_status,
101 .read_altstatus = ide_read_altstatus,
102 .read_sff_dma_status = ide_read_sff_dma_status,
104 .set_irq = ide_set_irq,
106 .tf_load = ide_tf_load,
107 .tf_read = ide_tf_read,
109 .input_data = q40ide_input_data,
110 .output_data = q40ide_output_data,
113 static const struct ide_port_info q40ide_port_info = {
114 .tp_ops = &q40ide_tp_ops,
115 .host_flags = IDE_HFLAG_NO_DMA,
119 * the static array is needed to have the name reported in /proc/ioports,
120 * hwif->name unfortunately isn't available yet
122 static const char *q40_ide_names[Q40IDE_NUM_HWIFS]={
127 * Probe for Q40 IDE interfaces
130 static int __init q40ide_init(void)
133 hw_regs_t hw[Q40IDE_NUM_HWIFS], *hws[] = { NULL, NULL, NULL, NULL };
138 printk(KERN_INFO "ide: Q40 IDE controller\n");
140 for (i = 0; i < Q40IDE_NUM_HWIFS; i++) {
141 const char *name = q40_ide_names[i];
143 if (!request_region(pcide_bases[i], 8, name)) {
144 printk("could not reserve ports %lx-%lx for %s\n",
145 pcide_bases[i],pcide_bases[i]+8,name);
148 if (!request_region(pcide_bases[i]+0x206, 1, name)) {
149 printk("could not reserve port %lx for %s\n",
150 pcide_bases[i]+0x206,name);
151 release_region(pcide_bases[i], 8);
154 q40_ide_setup_ports(&hw[i], pcide_bases[i], NULL,
155 q40ide_default_irq(pcide_bases[i]));
160 return ide_host_add(&q40ide_port_info, hws, NULL);
163 module_init(q40ide_init);
165 MODULE_LICENSE("GPL");