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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * Copyright (C) 1996 Linus Torvalds & author (see below)
3 */
4
5/*
6 * ALI M14xx chipset EIDE controller
7 *
8 * Works for ALI M1439/1443/1445/1487/1489 chipsets.
9 *
10 * Adapted from code developed by derekn@vw.ece.cmu.edu. -ml
11 * Derek's notes follow:
12 *
13 * I think the code should be pretty understandable,
14 * but I'll be happy to (try to) answer questions.
15 *
16 * The critical part is in the setupDrive function. The initRegisters
17 * function doesn't seem to be necessary, but the DOS driver does it, so
18 * I threw it in.
19 *
20 * I've only tested this on my system, which only has one disk. I posted
21 * it to comp.sys.linux.hardware, so maybe some other people will try it
22 * out.
23 *
24 * Derek Noonburg (derekn@ece.cmu.edu)
25 * 95-sep-26
26 *
27 * Update 96-jul-13:
28 *
29 * I've since upgraded to two disks and a CD-ROM, with no trouble, and
30 * I've also heard from several others who have used it successfully.
31 * This driver appears to work with both the 1443/1445 and the 1487/1489
32 * chipsets. I've added support for PIO mode 4 for the 1487. This
33 * seems to work just fine on the 1443 also, although I'm not sure it's
34 * advertised as supporting mode 4. (I've been running a WDC AC21200 in
35 * mode 4 for a while now with no trouble.) -Derek
36 */
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070039#include <linux/types.h>
40#include <linux/kernel.h>
41#include <linux/delay.h>
42#include <linux/timer.h>
43#include <linux/mm.h>
44#include <linux/ioport.h>
45#include <linux/blkdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/ide.h>
47#include <linux/init.h>
48
49#include <asm/io.h>
50
Bartlomiej Zolnierkiewiczd92f1a22008-04-26 22:25:18 +020051#define DRV_NAME "ali14xx"
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053/* port addresses for auto-detection */
54#define ALI_NUM_PORTS 4
Bartlomiej Zolnierkiewicz498f26b2007-11-27 21:35:57 +010055static const int ports[ALI_NUM_PORTS] __initdata =
56 { 0x074, 0x0f4, 0x034, 0x0e4 };
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58/* register initialization data */
59typedef struct { u8 reg, data; } RegInitializer;
60
Bartlomiej Zolnierkiewicz498f26b2007-11-27 21:35:57 +010061static const RegInitializer initData[] __initdata = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 {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
Linus Torvalds1da177e2005-04-16 15:20:36 -070071/* timing parameter registers for each drive */
72static struct { u8 reg1, reg2, reg3, reg4; } regTab[4] = {
73 {0x03, 0x26, 0x04, 0x27}, /* drive 0 */
74 {0x05, 0x28, 0x06, 0x29}, /* drive 1 */
75 {0x2b, 0x30, 0x2c, 0x31}, /* drive 2 */
76 {0x2d, 0x32, 0x2e, 0x33}, /* drive 3 */
77};
78
79static int basePort; /* base port address */
80static int regPort; /* port for register number */
81static int dataPort; /* port for register data */
82static u8 regOn; /* output to base port to access registers */
83static u8 regOff; /* output to base port to close registers */
84
85/*------------------------------------------------------------------------*/
86
87/*
88 * Read a controller register.
89 */
Paolo Ciarrocchi38bdb412008-04-26 17:36:41 +020090static inline u8 inReg(u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091{
92 outb_p(reg, regPort);
93 return inb(dataPort);
94}
95
96/*
97 * Write a controller register.
98 */
Paolo Ciarrocchi38bdb412008-04-26 17:36:41 +020099static void outReg(u8 data, u8 reg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
101 outb_p(reg, regPort);
102 outb_p(data, dataPort);
103}
104
Bartlomiej Zolnierkiewicz2047e152007-10-20 00:32:35 +0200105static DEFINE_SPINLOCK(ali14xx_lock);
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107/*
108 * Set PIO mode for the specified drive.
109 * This function computes timing parameters
110 * and sets controller registers accordingly.
111 */
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -0800112static void ali14xx_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113{
114 int driveNum;
115 int time1, time2;
116 u8 param1, param2, param3, param4;
117 unsigned long flags;
Bartlomiej Zolnierkiewicz30e5ee42008-07-15 21:21:46 +0200118 int bus_speed = ide_vlb_clk ? ide_vlb_clk : 50;
Bartlomiej Zolnierkiewicze085b3c2010-01-19 01:44:41 -0800119 const u8 pio = drive->pio_mode - XFER_PIO_0;
Bartlomiej Zolnierkiewiczcc57ccc2008-07-16 20:33:37 +0200120 struct ide_timing *t = ide_timing_find_mode(XFER_PIO_0 + pio);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 /* calculate timing, according to PIO mode */
Bartlomiej Zolnierkiewicz7dd00082007-07-20 01:11:56 +0200123 time1 = ide_pio_cycle_time(drive, pio);
Bartlomiej Zolnierkiewiczcc57ccc2008-07-16 20:33:37 +0200124 time2 = t->active;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 param3 = param1 = (time2 * bus_speed + 999) / 1000;
126 param4 = param2 = (time1 * bus_speed + 999) / 1000 - param1;
127 if (pio < 3) {
128 param3 += 8;
129 param4 += 8;
130 }
131 printk(KERN_DEBUG "%s: PIO mode%d, t1=%dns, t2=%dns, cycles = %d+%d, %d+%d\n",
132 drive->name, pio, time1, time2, param1, param2, param3, param4);
133
134 /* stuff timing parameters into controller registers */
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200135 driveNum = (drive->hwif->index << 1) + (drive->dn & 1);
Bartlomiej Zolnierkiewicz2047e152007-10-20 00:32:35 +0200136 spin_lock_irqsave(&ali14xx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 outb_p(regOn, basePort);
138 outReg(param1, regTab[driveNum].reg1);
139 outReg(param2, regTab[driveNum].reg2);
140 outReg(param3, regTab[driveNum].reg3);
141 outReg(param4, regTab[driveNum].reg4);
142 outb_p(regOff, basePort);
Bartlomiej Zolnierkiewicz2047e152007-10-20 00:32:35 +0200143 spin_unlock_irqrestore(&ali14xx_lock, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144}
145
146/*
147 * Auto-detect the IDE controller port.
148 */
Paolo Ciarrocchi38bdb412008-04-26 17:36:41 +0200149static int __init findPort(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150{
151 int i;
152 u8 t;
153 unsigned long flags;
154
155 local_irq_save(flags);
156 for (i = 0; i < ALI_NUM_PORTS; ++i) {
157 basePort = ports[i];
158 regOff = inb(basePort);
159 for (regOn = 0x30; regOn <= 0x33; ++regOn) {
160 outb_p(regOn, basePort);
161 if (inb(basePort) == regOn) {
162 regPort = basePort + 4;
163 dataPort = basePort + 8;
164 t = inReg(0) & 0xf0;
165 outb_p(regOff, basePort);
166 local_irq_restore(flags);
167 if (t != 0x50)
168 return 0;
169 return 1; /* success */
170 }
171 }
172 outb_p(regOff, basePort);
173 }
174 local_irq_restore(flags);
175 return 0;
176}
177
178/*
179 * Initialize controller registers with default values.
180 */
Paolo Ciarrocchi38bdb412008-04-26 17:36:41 +0200181static int __init initRegisters(void)
182{
Bartlomiej Zolnierkiewicz498f26b2007-11-27 21:35:57 +0100183 const RegInitializer *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 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
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200198static const struct ide_port_ops ali14xx_port_ops = {
199 .set_pio_mode = ali14xx_set_pio_mode,
200};
201
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100202static const struct ide_port_info ali14xx_port_info = {
Bartlomiej Zolnierkiewiczd92f1a22008-04-26 22:25:18 +0200203 .name = DRV_NAME,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100204 .chipset = ide_ali14xx,
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200205 .port_ops = &ali14xx_port_ops,
Bartlomiej Zolnierkiewicz0d28ec72008-04-27 15:38:29 +0200206 .host_flags = IDE_HFLAG_NO_DMA,
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +0100207 .pio_mask = ATA_PIO4,
208};
209
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210static int __init ali14xx_probe(void)
211{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 printk(KERN_DEBUG "ali14xx: base=0x%03x, regOn=0x%02x.\n",
213 basePort, regOn);
214
215 /* initialize controller registers */
216 if (!initRegisters()) {
217 printk(KERN_ERR "ali14xx: Chip initialization failed.\n");
218 return 1;
219 }
220
Bartlomiej Zolnierkiewicz0bfeee72008-04-26 22:25:16 +0200221 return ide_legacy_device_add(&ali14xx_port_info, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
223
Bartlomiej Zolnierkiewiczef87f8d2008-04-27 15:38:24 +0200224static int probe_ali14xx;
Bartlomiej Zolnierkiewicz84913882007-03-03 17:48:55 +0100225
226module_param_named(probe, probe_ali14xx, bool, 0);
227MODULE_PARM_DESC(probe, "probe for ALI M14xx chipsets");
228
Bartlomiej Zolnierkiewiczade2daf2008-01-26 20:13:07 +0100229static int __init ali14xx_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230{
Bartlomiej Zolnierkiewicz84913882007-03-03 17:48:55 +0100231 if (probe_ali14xx == 0)
232 goto out;
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 /* 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");
Bartlomiej Zolnierkiewicz84913882007-03-03 17:48:55 +0100241out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 return -ENODEV;
243}
244
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245module_init(ali14xx_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247MODULE_AUTHOR("see local file");
248MODULE_DESCRIPTION("support of ALI 14XX IDE chipsets");
249MODULE_LICENSE("GPL");