2 * linux/drivers/ide/pci/opti621.c Version 0.7 Sept 10, 2002
4 * Copyright (C) 1996-1998 Linus Torvalds & authors (see below)
9 * Jaromir Koutek <miri@punknet.cz>,
10 * Jan Harkes <jaharkes@cwi.nl>,
11 * Mark Lord <mlord@pobox.com>
12 * Some parts of code are from ali14xx.c and from rz1000.c.
14 * OPTi is trademark of OPTi, Octek is trademark of Octek.
16 * I used docs from OPTi databook, from ftp.opti.com, file 9123-0002.ps
17 * and disassembled/traced setupvic.exe (DOS program).
18 * It increases kernel code about 2 kB.
19 * I don't have this card no more, but I hope I can get some in case
20 * of needed development.
21 * My card is Octek PIDE 1.01 (on card) or OPTiViC (program).
22 * It has a place for a secondary connector in circuit, but nothing
23 * is there. Also BIOS says no address for
24 * secondary controller (see bellow in ide_init_opti621).
25 * I've only tested this on my system, which only has one disk.
26 * It's Western Digital WDAC2850, with PIO mode 3. The PCI bus
27 * is at 20 MHz (I have DX2/80, I tried PCI at 40, but I got random
28 * lockups). I tried the OCTEK double speed CD-ROM and
29 * it does not work! But I can't boot DOS also, so it's probably
30 * hardware fault. I have connected Conner 80MB, the Seagate 850MB (no
31 * problems) and Seagate 1GB (as slave, WD as master). My experiences
32 * with the third, 1GB drive: I got 3MB/s (hdparm), but sometimes
33 * it slows to about 100kB/s! I don't know why and I have
34 * not this drive now, so I can't try it again.
35 * I write this driver because I lost the paper ("manual") with
36 * settings of jumpers on the card and I have to boot Linux with
37 * Loadlin except LILO, cause I have to run the setupvic.exe program
38 * already or I get disk errors (my test: rpm -Vf
39 * /usr/X11R6/bin/XF86_SVGA - or any big file).
40 * Some numbers from hdparm -t /dev/hda:
41 * Timing buffer-cache reads: 32 MB in 3.02 seconds =10.60 MB/sec
42 * Timing buffered disk reads: 16 MB in 5.52 seconds = 2.90 MB/sec
43 * I have 4 Megs/s before, but I don't know why (maybe changes
45 * After release of 0.1, I got some successful reports, so it might work.
47 * The main problem with OPTi is that some timings for master
48 * and slave must be the same. For example, if you have master
49 * PIO 3 and slave PIO 0, driver have to set some timings of
50 * master for PIO 0. Second problem is that opti621_tune_drive
51 * got only one drive to set, but have to set both drives.
52 * This is solved in compute_pios. If you don't set
53 * the second drive, compute_pios use ide_get_best_pio_mode
54 * for autoselect mode (you can change it to PIO 0, if you want).
55 * If you then set the second drive to another PIO, the old value
56 * (automatically selected) will be overrided by yours.
57 * There is a 25/33MHz switch in configuration
58 * register, but driver is written for use at any frequency which get
59 * (use idebus=xx to select PCI bus speed).
60 * Use ide0=autotune for automatical tune of the PIO modes.
61 * If you get strange results, do not use this and set PIO manually
64 * Version 0.1, Nov 8, 1996
65 * by Jaromir Koutek, for 2.1.8.
66 * Initial version of driver.
71 * Version 0.3, Nov 29, 1997
72 * by Mark Lord (probably), for 2.1.68
73 * Updates for use with new IDE block driver.
75 * Version 0.4, Dec 14, 1997
77 * Fixed some errors and cleaned the code.
79 * Version 0.5, Jan 2, 1998
81 * Updates for use with (again) new IDE block driver.
82 * Update of documentation.
84 * Version 0.6, Jan 2, 1999
86 * Reversed to version 0.3 of the driver, because
90 #undef REALLY_SLOW_IO /* most systems can safely undef this */
91 #define OPTI621_DEBUG /* define for debug messages */
93 #include <linux/types.h>
94 #include <linux/module.h>
95 #include <linux/kernel.h>
96 #include <linux/delay.h>
97 #include <linux/timer.h>
99 #include <linux/ioport.h>
100 #include <linux/blkdev.h>
101 #include <linux/pci.h>
102 #include <linux/hdreg.h>
103 #include <linux/ide.h>
107 #define OPTI621_MAX_PIO 3
108 /* In fact, I do not have any PIO 4 drive
109 * (address: 25 ns, data: 70 ns, recovery: 35 ns),
110 * but OPTi 82C621 is programmable and it can do (minimal values):
111 * on 40MHz PCI bus (pulse 25 ns):
112 * address: 25 ns, data: 25 ns, recovery: 50 ns;
113 * on 20MHz PCI bus (pulse 50 ns):
114 * address: 50 ns, data: 50 ns, recovery: 100 ns.
117 /* #define READ_PREFETCH 0 */
118 /* Uncomment for disable read prefetch.
119 * There is some readprefetch capatibility in hdparm,
120 * but when I type hdparm -P 1 /dev/hda, I got errors
121 * and till reset drive is inaccessible.
122 * This (hw) read prefetch is safe on my drive.
125 #ifndef READ_PREFETCH
126 #define READ_PREFETCH 0x40 /* read prefetch is enabled */
127 #endif /* else read prefetch is disabled */
129 #define READ_REG 0 /* index of Read cycle timing register */
130 #define WRITE_REG 1 /* index of Write cycle timing register */
131 #define CNTRL_REG 3 /* index of Control register */
132 #define STRAP_REG 5 /* index of Strap register */
133 #define MISC_REG 6 /* index of Miscellaneous register */
137 #define PIO_NOT_EXIST 254
138 #define PIO_DONT_KNOW 255
140 /* there are stored pio numbers from other calls of opti621_tune_drive */
141 static void compute_pios(ide_drive_t *drive, u8 pio)
142 /* Store values into drive->drive_data
143 * second_contr - 0 for primary controller, 1 for secondary
144 * slave_drive - 0 -> pio is for master, 1 -> pio is for slave
145 * pio - PIO mode for selected drive (for other we don't know)
149 ide_hwif_t *hwif = HWIF(drive);
151 drive->drive_data = ide_get_best_pio_mode(drive, pio, OPTI621_MAX_PIO, NULL);
152 for (d = 0; d < 2; ++d) {
153 drive = &hwif->drives[d];
154 if (drive->present) {
155 if (drive->drive_data == PIO_DONT_KNOW)
156 drive->drive_data = ide_get_best_pio_mode(drive, 255, OPTI621_MAX_PIO, NULL);
158 printk("%s: Selected PIO mode %d\n",
159 drive->name, drive->drive_data);
162 drive->drive_data = PIO_NOT_EXIST;
167 static int cmpt_clk(int time, int bus_speed)
168 /* Returns (rounded up) time in clocks for time in ns,
169 * with bus_speed in MHz.
170 * Example: bus_speed = 40 MHz, time = 80 ns
171 * 1000/40 = 25 ns (clk value),
172 * 80/25 = 3.2, rounded up to 4 (I hope ;-)).
173 * Use idebus=xx to select right frequency.
176 return ((time*bus_speed+999)/1000);
179 /* Write value to register reg, base of register
180 * is at reg_base (0x1f0 primary, 0x170 secondary,
181 * if not changed by PCI configuration).
182 * This is from setupvic.exe program.
184 static void write_reg(u8 value, int reg)
188 outb(3, reg_base + 2);
189 outb(value, reg_base + reg);
190 outb(0x83, reg_base + 2);
193 /* Read value from register reg, base of register
194 * is at reg_base (0x1f0 primary, 0x170 secondary,
195 * if not changed by PCI configuration).
196 * This is from setupvic.exe program.
198 static u8 read_reg(int reg)
204 outb(3, reg_base + 2);
205 ret = inb(reg_base + reg);
206 outb(0x83, reg_base + 2);
211 typedef struct pio_clocks_s {
212 int address_time; /* Address setup (clocks) */
213 int data_time; /* Active/data pulse (clocks) */
214 int recovery_time; /* Recovery time (clocks) */
217 static void compute_clocks(int pio, pio_clocks_t *clks)
219 if (pio != PIO_NOT_EXIST) {
220 int adr_setup, data_pls;
221 int bus_speed = system_bus_clock();
223 adr_setup = ide_pio_timings[pio].setup_time;
224 data_pls = ide_pio_timings[pio].active_time;
225 clks->address_time = cmpt_clk(adr_setup, bus_speed);
226 clks->data_time = cmpt_clk(data_pls, bus_speed);
227 clks->recovery_time = cmpt_clk(ide_pio_timings[pio].cycle_time
228 - adr_setup-data_pls, bus_speed);
229 if (clks->address_time<1) clks->address_time = 1;
230 if (clks->address_time>4) clks->address_time = 4;
231 if (clks->data_time<1) clks->data_time = 1;
232 if (clks->data_time>16) clks->data_time = 16;
233 if (clks->recovery_time<2) clks->recovery_time = 2;
234 if (clks->recovery_time>17) clks->recovery_time = 17;
236 clks->address_time = 1;
238 clks->recovery_time = 2;
244 /* Main tune procedure, called from tuneproc. */
245 static void opti621_tune_drive (ide_drive_t *drive, u8 pio)
247 /* primary and secondary drives share some registers,
248 * so we have to program both drives
251 u8 pio1 = 0, pio2 = 0;
252 pio_clocks_t first, second;
254 u8 cycle1, cycle2, misc;
255 ide_hwif_t *hwif = HWIF(drive);
257 /* sets drive->drive_data for both drives */
258 compute_pios(drive, pio);
259 pio1 = hwif->drives[0].drive_data;
260 pio2 = hwif->drives[1].drive_data;
262 compute_clocks(pio1, &first);
263 compute_clocks(pio2, &second);
265 /* ax = max(a1,a2) */
266 ax = (first.address_time < second.address_time) ? second.address_time : first.address_time;
268 drdy = 2; /* DRDY is default 2 (by OPTi Databook) */
270 cycle1 = ((first.data_time-1)<<4) | (first.recovery_time-2);
271 cycle2 = ((second.data_time-1)<<4) | (second.recovery_time-2);
272 misc = READ_PREFETCH | ((ax-1)<<4) | ((drdy-2)<<1);
275 printk("%s: master: address: %d, data: %d, "
276 "recovery: %d, drdy: %d [clk]\n",
277 hwif->name, ax, first.data_time,
278 first.recovery_time, drdy);
279 printk("%s: slave: address: %d, data: %d, "
280 "recovery: %d, drdy: %d [clk]\n",
281 hwif->name, ax, second.data_time,
282 second.recovery_time, drdy);
285 spin_lock_irqsave(&ide_lock, flags);
287 reg_base = hwif->io_ports[IDE_DATA_OFFSET];
289 /* allow Register-B */
290 outb(0xc0, reg_base + CNTRL_REG);
291 /* hmm, setupvic.exe does this ;-) */
292 outb(0xff, reg_base + 5);
293 /* if reads 0xff, adapter not exist? */
294 (void)inb(reg_base + CNTRL_REG);
295 /* if reads 0xc0, no interface exist? */
297 /* read version, probably 0 */
300 /* program primary drive */
301 /* select Index-0 for Register-A */
302 write_reg(0, MISC_REG);
303 /* set read cycle timings */
304 write_reg(cycle1, READ_REG);
305 /* set write cycle timings */
306 write_reg(cycle1, WRITE_REG);
308 /* program secondary drive */
309 /* select Index-1 for Register-B */
310 write_reg(1, MISC_REG);
311 /* set read cycle timings */
312 write_reg(cycle2, READ_REG);
313 /* set write cycle timings */
314 write_reg(cycle2, WRITE_REG);
316 /* use Register-A for drive 0 */
317 /* use Register-B for drive 1 */
318 write_reg(0x85, CNTRL_REG);
320 /* set address setup, DRDY timings, */
321 /* and read prefetch for both drives */
322 write_reg(misc, MISC_REG);
324 spin_unlock_irqrestore(&ide_lock, flags);
328 * init_hwif_opti621() is called once for each hwif found at boot.
330 static void __devinit init_hwif_opti621 (ide_hwif_t *hwif)
333 hwif->drives[0].drive_data = PIO_DONT_KNOW;
334 hwif->drives[1].drive_data = PIO_DONT_KNOW;
335 hwif->tuneproc = &opti621_tune_drive;
337 if (!(hwif->dma_base))
341 hwif->mwdma_mask = 0x07;
342 hwif->swdma_mask = 0x07;
346 hwif->drives[0].autodma = hwif->autodma;
347 hwif->drives[1].autodma = hwif->autodma;
350 static ide_pci_device_t opti621_chipsets[] __devinitdata = {
353 .init_hwif = init_hwif_opti621,
356 .enablebits = {{0x45,0x80,0x00}, {0x40,0x08,0x00}},
357 .bootable = ON_BOARD,
360 .init_hwif = init_hwif_opti621,
363 .enablebits = {{0x45,0x80,0x00}, {0x40,0x08,0x00}},
364 .bootable = ON_BOARD,
368 static int __devinit opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id)
370 return ide_setup_pci_device(dev, &opti621_chipsets[id->driver_data]);
373 static struct pci_device_id opti621_pci_tbl[] = {
374 { PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C621, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
375 { PCI_VENDOR_ID_OPTI, PCI_DEVICE_ID_OPTI_82C825, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
378 MODULE_DEVICE_TABLE(pci, opti621_pci_tbl);
380 static struct pci_driver driver = {
381 .name = "Opti621_IDE",
382 .id_table = opti621_pci_tbl,
383 .probe = opti621_init_one,
386 static int __init opti621_ide_init(void)
388 return ide_pci_register_driver(&driver);
391 module_init(opti621_ide_init);
393 MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
394 MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
395 MODULE_LICENSE("GPL");