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ide: remove some obsoleted kernel params (v2)
[net-next-2.6.git] / drivers / ide / legacy / ali14xx.c
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1da177e4
LT
1/*
2 * linux/drivers/ide/legacy/ali14xx.c Version 0.03 Feb 09, 1996
3 *
4 * Copyright (C) 1996 Linus Torvalds & author (see below)
5 */
6
7/*
8 * ALI M14xx chipset EIDE controller
9 *
10 * Works for ALI M1439/1443/1445/1487/1489 chipsets.
11 *
12 * Adapted from code developed by derekn@vw.ece.cmu.edu. -ml
13 * Derek's notes follow:
14 *
15 * I think the code should be pretty understandable,
16 * but I'll be happy to (try to) answer questions.
17 *
18 * The critical part is in the setupDrive function. The initRegisters
19 * function doesn't seem to be necessary, but the DOS driver does it, so
20 * I threw it in.
21 *
22 * I've only tested this on my system, which only has one disk. I posted
23 * it to comp.sys.linux.hardware, so maybe some other people will try it
24 * out.
25 *
26 * Derek Noonburg (derekn@ece.cmu.edu)
27 * 95-sep-26
28 *
29 * Update 96-jul-13:
30 *
31 * I've since upgraded to two disks and a CD-ROM, with no trouble, and
32 * I've also heard from several others who have used it successfully.
33 * This driver appears to work with both the 1443/1445 and the 1487/1489
34 * chipsets. I've added support for PIO mode 4 for the 1487. This
35 * seems to work just fine on the 1443 also, although I'm not sure it's
36 * advertised as supporting mode 4. (I've been running a WDC AC21200 in
37 * mode 4 for a while now with no trouble.) -Derek
38 */
39
1da177e4 40#include <linux/module.h>
1da177e4
LT
41#include <linux/types.h>
42#include <linux/kernel.h>
43#include <linux/delay.h>
44#include <linux/timer.h>
45#include <linux/mm.h>
46#include <linux/ioport.h>
47#include <linux/blkdev.h>
48#include <linux/hdreg.h>
49#include <linux/ide.h>
50#include <linux/init.h>
51
52#include <asm/io.h>
53
54/* port addresses for auto-detection */
55#define ALI_NUM_PORTS 4
56static int ports[ALI_NUM_PORTS] __initdata = {0x074, 0x0f4, 0x034, 0x0e4};
57
58/* register initialization data */
59typedef struct { u8 reg, data; } RegInitializer;
60
61static RegInitializer initData[] __initdata = {
62 {0x01, 0x0f}, {0x02, 0x00}, {0x03, 0x00}, {0x04, 0x00},
63 {0x05, 0x00}, {0x06, 0x00}, {0x07, 0x2b}, {0x0a, 0x0f},
64 {0x25, 0x00}, {0x26, 0x00}, {0x27, 0x00}, {0x28, 0x00},
65 {0x29, 0x00}, {0x2a, 0x00}, {0x2f, 0x00}, {0x2b, 0x00},
66 {0x2c, 0x00}, {0x2d, 0x00}, {0x2e, 0x00}, {0x30, 0x00},
67 {0x31, 0x00}, {0x32, 0x00}, {0x33, 0x00}, {0x34, 0xff},
68 {0x35, 0x03}, {0x00, 0x00}
69};
70
71#define ALI_MAX_PIO 4
72
73/* timing parameter registers for each drive */
74static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = {
75 {0x03, 0x26, 0x04, 0x27}, /* drive 0 */
76 {0x05, 0x28, 0x06, 0x29}, /* drive 1 */
77 {0x2b, 0x30, 0x2c, 0x31}, /* drive 2 */
78 {0x2d, 0x32, 0x2e, 0x33}, /* drive 3 */
79};
80
81static int basePort; /* base port address */
82static int regPort; /* port for register number */
83static int dataPort; /* port for register data */
84static u8 regOn; /* output to base port to access registers */
85static u8 regOff; /* output to base port to close registers */
86
87/*------------------------------------------------------------------------*/
88
89/*
90 * Read a controller register.
91 */
92static inline u8 inReg (u8 reg)
93{
94 outb_p(reg, regPort);
95 return inb(dataPort);
96}
97
98/*
99 * Write a controller register.
100 */
101static void outReg (u8 data, u8 reg)
102{
103 outb_p(reg, regPort);
104 outb_p(data, dataPort);
105}
106
107/*
108 * Set PIO mode for the specified drive.
109 * This function computes timing parameters
110 * and sets controller registers accordingly.
111 */
112static void ali14xx_tune_drive (ide_drive_t *drive, u8 pio)
113{
114 int driveNum;
115 int time1, time2;
116 u8 param1, param2, param3, param4;
117 unsigned long flags;
118 ide_pio_data_t d;
119 int bus_speed = system_bus_clock();
120
121 pio = ide_get_best_pio_mode(drive, pio, ALI_MAX_PIO, &d);
122
123 /* calculate timing, according to PIO mode */
124 time1 = d.cycle_time;
125 time2 = ide_pio_timings[pio].active_time;
126 param3 = param1 = (time2 * bus_speed + 999) / 1000;
127 param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1;
128 if (pio < 3) {
129 param3 += 8;
130 param4 += 8;
131 }
132 printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n",
133 drive->name, pio, time1, time2, param1, param2, param3, param4);
134
135 /* stuff timing parameters into controller registers */
136 driveNum = (HWIF(drive)->index << 1) + drive->select.b.unit;
137 spin_lock_irqsave(&ide_lock, flags);
138 outb_p(regOn, basePort);
139 outReg(param1, regTab[driveNum].reg1);
140 outReg(param2, regTab[driveNum].reg2);
141 outReg(param3, regTab[driveNum].reg3);
142 outReg(param4, regTab[driveNum].reg4);
143 outb_p(regOff, basePort);
144 spin_unlock_irqrestore(&ide_lock, flags);
145}
146
147/*
148 * Auto-detect the IDE controller port.
149 */
150static int __init findPort (void)
151{
152 int i;
153 u8 t;
154 unsigned long flags;
155
156 local_irq_save(flags);
157 for (i = 0; i < ALI_NUM_PORTS; ++i) {
158 basePort = ports[i];
159 regOff = inb(basePort);
160 for (regOn = 0x30; regOn <= 0x33; ++regOn) {
161 outb_p(regOn, basePort);
162 if (inb(basePort) == regOn) {
163 regPort = basePort + 4;
164 dataPort = basePort + 8;
165 t = inReg(0) & 0xf0;
166 outb_p(regOff, basePort);
167 local_irq_restore(flags);
168 if (t != 0x50)
169 return 0;
170 return 1; /* success */
171 }
172 }
173 outb_p(regOff, basePort);
174 }
175 local_irq_restore(flags);
176 return 0;
177}
178
179/*
180 * Initialize controller registers with default values.
181 */
182static int __init initRegisters (void) {
183 RegInitializer *p;
184 u8 t;
185 unsigned long flags;
186
187 local_irq_save(flags);
188 outb_p(regOn, basePort);
189 for (p = initData; p->reg != 0; ++p)
190 outReg(p->data, p->reg);
191 outb_p(0x01, regPort);
192 t = inb(regPort) & 0x01;
193 outb_p(regOff, basePort);
194 local_irq_restore(flags);
195 return t;
196}
197
198static int __init ali14xx_probe(void)
199{
200 ide_hwif_t *hwif, *mate;
201
202 printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n",
203 basePort, regOn);
204
205 /* initialize controller registers */
206 if (!initRegisters()) {
207 printk(KERN_ERR "ali14xx: Chip initialization failed.\n");
208 return 1;
209 }
210
211 hwif = &ide_hwifs[0];
212 mate = &ide_hwifs[1];
213
214 hwif->chipset = ide_ali14xx;
215 hwif->tuneproc = &ali14xx_tune_drive;
216 hwif->mate = mate;
217
218 mate->chipset = ide_ali14xx;
219 mate->tuneproc = &ali14xx_tune_drive;
220 mate->mate = hwif;
221 mate->channel = 1;
222
223 probe_hwif_init(hwif);
224 probe_hwif_init(mate);
225
226 create_proc_ide_interfaces();
227
228 return 0;
229}
230
231/* Can be called directly from ide.c. */
232int __init ali14xx_init(void)
233{
234 /* auto-detect IDE controller port */
235 if (findPort()) {
236 if (ali14xx_probe())
237 return -ENODEV;
238 return 0;
239 }
240 printk(KERN_ERR "ali14xx: not found.\n");
241 return -ENODEV;
242}
243
244#ifdef MODULE
245module_init(ali14xx_init);
246#endif
247
248MODULE_AUTHOR("see local file");
249MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets");
250MODULE_LICENSE("GPL");