1 /*
2 * Copyright (C) 1996-1998 Linus Torvalds & authors (see below)
3 */
4
5 /*
6 * Authors:
7 * Jaromir Koutek <miri@punknet.cz>,
8 * Jan Harkes <jaharkes@cwi.nl>,
9 * Mark Lord <mlord@pobox.com>
10 * Some parts of code are from ali14xx.c and from rz1000.c.
11 */
12
13 #include <linux/types.h>
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/pci.h>
17 #include <linux/ide.h>
18
19 #include <asm/io.h>
20
21 #define DRV_NAME "opti621"
22
23 #define READ_REG 0 /* index of Read cycle timing register */
24 #define WRITE_REG 1 /* index of Write cycle timing register */
25 #define CNTRL_REG 3 /* index of Control register */
26 #define STRAP_REG 5 /* index of Strap register */
27 #define MISC_REG 6 /* index of Miscellaneous register */
28
29 static int reg_base;
30
31 static DEFINE_SPINLOCK(opti621_lock);
32
33 /* Write value to register reg, base of register
34 * is at reg_base (0x1f0 primary, 0x170 secondary,
35 * if not changed by PCI configuration).
36 * This is from setupvic.exe program.
37 */
write_reg(u8 value,int reg)38 static void write_reg(u8 value, int reg)
39 {
40 inw(reg_base + 1);
41 inw(reg_base + 1);
42 outb(3, reg_base + 2);
43 outb(value, reg_base + reg);
44 outb(0x83, reg_base + 2);
45 }
46
47 /* Read value from register reg, base of register
48 * is at reg_base (0x1f0 primary, 0x170 secondary,
49 * if not changed by PCI configuration).
50 * This is from setupvic.exe program.
51 */
read_reg(int reg)52 static u8 read_reg(int reg)
53 {
54 u8 ret = 0;
55
56 inw(reg_base + 1);
57 inw(reg_base + 1);
58 outb(3, reg_base + 2);
59 ret = inb(reg_base + reg);
60 outb(0x83, reg_base + 2);
61
62 return ret;
63 }
64
opti621_set_pio_mode(ide_hwif_t * hwif,ide_drive_t * drive)65 static void opti621_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
66 {
67 ide_drive_t *pair = ide_get_pair_dev(drive);
68 unsigned long flags;
69 unsigned long mode = drive->pio_mode, pair_mode;
70 const u8 pio = mode - XFER_PIO_0;
71 u8 tim, misc, addr_pio = pio, clk;
72
73 /* DRDY is default 2 (by OPTi Databook) */
74 static const u8 addr_timings[2][5] = {
75 { 0x20, 0x10, 0x00, 0x00, 0x00 }, /* 33 MHz */
76 { 0x10, 0x10, 0x00, 0x00, 0x00 }, /* 25 MHz */
77 };
78 static const u8 data_rec_timings[2][5] = {
79 { 0x5b, 0x45, 0x32, 0x21, 0x20 }, /* 33 MHz */
80 { 0x48, 0x34, 0x21, 0x10, 0x10 } /* 25 MHz */
81 };
82
83 ide_set_drivedata(drive, (void *)mode);
84
85 if (pair) {
86 pair_mode = (unsigned long)ide_get_drivedata(pair);
87 if (pair_mode && pair_mode < mode)
88 addr_pio = pair_mode - XFER_PIO_0;
89 }
90
91 spin_lock_irqsave(&opti621_lock, flags);
92
93 reg_base = hwif->io_ports.data_addr;
94
95 /* allow Register-B */
96 outb(0xc0, reg_base + CNTRL_REG);
97 /* hmm, setupvic.exe does this ;-) */
98 outb(0xff, reg_base + 5);
99 /* if reads 0xff, adapter not exist? */
100 (void)inb(reg_base + CNTRL_REG);
101 /* if reads 0xc0, no interface exist? */
102 read_reg(CNTRL_REG);
103
104 /* check CLK speed */
105 clk = read_reg(STRAP_REG) & 1;
106
107 printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
108
109 tim = data_rec_timings[clk][pio];
110 misc = addr_timings[clk][addr_pio];
111
112 /* select Index-0/1 for Register-A/B */
113 write_reg(drive->dn & 1, MISC_REG);
114 /* set read cycle timings */
115 write_reg(tim, READ_REG);
116 /* set write cycle timings */
117 write_reg(tim, WRITE_REG);
118
119 /* use Register-A for drive 0 */
120 /* use Register-B for drive 1 */
121 write_reg(0x85, CNTRL_REG);
122
123 /* set address setup, DRDY timings, */
124 /* and read prefetch for both drives */
125 write_reg(misc, MISC_REG);
126
127 spin_unlock_irqrestore(&opti621_lock, flags);
128 }
129
130 static const struct ide_port_ops opti621_port_ops = {
131 .set_pio_mode = opti621_set_pio_mode,
132 };
133
134 static const struct ide_port_info opti621_chipset = {
135 .name = DRV_NAME,
136 .enablebits = { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
137 .port_ops = &opti621_port_ops,
138 .host_flags = IDE_HFLAG_NO_DMA,
139 .pio_mask = ATA_PIO4,
140 };
141
opti621_init_one(struct pci_dev * dev,const struct pci_device_id * id)142 static int opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id)
143 {
144 return ide_pci_init_one(dev, &opti621_chipset, NULL);
145 }
146
147 static const struct pci_device_id opti621_pci_tbl[] = {
148 { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 },
149 { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 0 },
150 { 0, },
151 };
152 MODULE_DEVICE_TABLE(pci, opti621_pci_tbl);
153
154 static struct pci_driver opti621_pci_driver = {
155 .name = "Opti621_IDE",
156 .id_table = opti621_pci_tbl,
157 .probe = opti621_init_one,
158 .remove = ide_pci_remove,
159 .suspend = ide_pci_suspend,
160 .resume = ide_pci_resume,
161 };
162
opti621_ide_init(void)163 static int __init opti621_ide_init(void)
164 {
165 return ide_pci_register_driver(&opti621_pci_driver);
166 }
167
opti621_ide_exit(void)168 static void __exit opti621_ide_exit(void)
169 {
170 pci_unregister_driver(&opti621_pci_driver);
171 }
172
173 module_init(opti621_ide_init);
174 module_exit(opti621_ide_exit);
175
176 MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
177 MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
178 MODULE_LICENSE("GPL");
179
