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 static void write_reg(ide_hwif_t
*hwif
, u8 value
, int reg
)
180 /* Write value to register reg, base of register
181 * is at reg_base (0x1f0 primary, 0x170 secondary,
182 * if not changed by PCI configuration).
183 * This is from setupvic.exe program.
186 hwif
->INW(reg_base
+1);
187 hwif
->INW(reg_base
+1);
188 hwif
->OUTB(3, reg_base
+2);
189 hwif
->OUTB(value
, reg_base
+reg
);
190 hwif
->OUTB(0x83, reg_base
+2);
193 static u8
read_reg(ide_hwif_t
*hwif
, int reg
)
194 /* Read value from register reg, base of register
195 * is at reg_base (0x1f0 primary, 0x170 secondary,
196 * if not changed by PCI configuration).
197 * This is from setupvic.exe program.
202 hwif
->INW(reg_base
+1);
203 hwif
->INW(reg_base
+1);
204 hwif
->OUTB(3, reg_base
+2);
205 ret
= hwif
->INB(reg_base
+reg
);
206 hwif
->OUTB(0x83, reg_base
+2);
210 typedef struct pio_clocks_s
{
211 int address_time
; /* Address setup (clocks) */
212 int data_time
; /* Active/data pulse (clocks) */
213 int recovery_time
; /* Recovery time (clocks) */
216 static void compute_clocks(int pio
, pio_clocks_t
*clks
)
218 if (pio
!= PIO_NOT_EXIST
) {
219 int adr_setup
, data_pls
;
220 int bus_speed
= system_bus_clock();
222 adr_setup
= ide_pio_timings
[pio
].setup_time
;
223 data_pls
= ide_pio_timings
[pio
].active_time
;
224 clks
->address_time
= cmpt_clk(adr_setup
, bus_speed
);
225 clks
->data_time
= cmpt_clk(data_pls
, bus_speed
);
226 clks
->recovery_time
= cmpt_clk(ide_pio_timings
[pio
].cycle_time
227 - adr_setup
-data_pls
, bus_speed
);
228 if (clks
->address_time
<1) clks
->address_time
= 1;
229 if (clks
->address_time
>4) clks
->address_time
= 4;
230 if (clks
->data_time
<1) clks
->data_time
= 1;
231 if (clks
->data_time
>16) clks
->data_time
= 16;
232 if (clks
->recovery_time
<2) clks
->recovery_time
= 2;
233 if (clks
->recovery_time
>17) clks
->recovery_time
= 17;
235 clks
->address_time
= 1;
237 clks
->recovery_time
= 2;
243 /* Main tune procedure, called from tuneproc. */
244 static void opti621_tune_drive (ide_drive_t
*drive
, u8 pio
)
246 /* primary and secondary drives share some registers,
247 * so we have to program both drives
250 u8 pio1
= 0, pio2
= 0;
251 pio_clocks_t first
, second
;
253 u8 cycle1
, cycle2
, misc
;
254 ide_hwif_t
*hwif
= HWIF(drive
);
256 /* sets drive->drive_data for both drives */
257 compute_pios(drive
, pio
);
258 pio1
= hwif
->drives
[0].drive_data
;
259 pio2
= hwif
->drives
[1].drive_data
;
261 compute_clocks(pio1
, &first
);
262 compute_clocks(pio2
, &second
);
264 /* ax = max(a1,a2) */
265 ax
= (first
.address_time
< second
.address_time
) ? second
.address_time
: first
.address_time
;
267 drdy
= 2; /* DRDY is default 2 (by OPTi Databook) */
269 cycle1
= ((first
.data_time
-1)<<4) | (first
.recovery_time
-2);
270 cycle2
= ((second
.data_time
-1)<<4) | (second
.recovery_time
-2);
271 misc
= READ_PREFETCH
| ((ax
-1)<<4) | ((drdy
-2)<<1);
274 printk("%s: master: address: %d, data: %d, "
275 "recovery: %d, drdy: %d [clk]\n",
276 hwif
->name
, ax
, first
.data_time
,
277 first
.recovery_time
, drdy
);
278 printk("%s: slave: address: %d, data: %d, "
279 "recovery: %d, drdy: %d [clk]\n",
280 hwif
->name
, ax
, second
.data_time
,
281 second
.recovery_time
, drdy
);
284 spin_lock_irqsave(&ide_lock
, flags
);
286 reg_base
= hwif
->io_ports
[IDE_DATA_OFFSET
];
288 /* allow Register-B */
289 hwif
->OUTB(0xc0, reg_base
+CNTRL_REG
);
290 /* hmm, setupvic.exe does this ;-) */
291 hwif
->OUTB(0xff, reg_base
+5);
292 /* if reads 0xff, adapter not exist? */
293 (void) hwif
->INB(reg_base
+CNTRL_REG
);
294 /* if reads 0xc0, no interface exist? */
295 read_reg(hwif
, CNTRL_REG
);
296 /* read version, probably 0 */
297 read_reg(hwif
, STRAP_REG
);
299 /* program primary drive */
300 /* select Index-0 for Register-A */
301 write_reg(hwif
, 0, MISC_REG
);
302 /* set read cycle timings */
303 write_reg(hwif
, cycle1
, READ_REG
);
304 /* set write cycle timings */
305 write_reg(hwif
, cycle1
, WRITE_REG
);
307 /* program secondary drive */
308 /* select Index-1 for Register-B */
309 write_reg(hwif
, 1, MISC_REG
);
310 /* set read cycle timings */
311 write_reg(hwif
, cycle2
, READ_REG
);
312 /* set write cycle timings */
313 write_reg(hwif
, cycle2
, WRITE_REG
);
315 /* use Register-A for drive 0 */
316 /* use Register-B for drive 1 */
317 write_reg(hwif
, 0x85, CNTRL_REG
);
319 /* set address setup, DRDY timings, */
320 /* and read prefetch for both drives */
321 write_reg(hwif
, misc
, MISC_REG
);
323 spin_unlock_irqrestore(&ide_lock
, flags
);
327 * init_hwif_opti621() is called once for each hwif found at boot.
329 static void __devinit
init_hwif_opti621 (ide_hwif_t
*hwif
)
332 hwif
->drives
[0].drive_data
= PIO_DONT_KNOW
;
333 hwif
->drives
[1].drive_data
= PIO_DONT_KNOW
;
334 hwif
->tuneproc
= &opti621_tune_drive
;
336 if (!(hwif
->dma_base
))
340 hwif
->mwdma_mask
= 0x07;
341 hwif
->swdma_mask
= 0x07;
345 hwif
->drives
[0].autodma
= hwif
->autodma
;
346 hwif
->drives
[1].autodma
= hwif
->autodma
;
349 static ide_pci_device_t opti621_chipsets
[] __devinitdata
= {
352 .init_hwif
= init_hwif_opti621
,
355 .enablebits
= {{0x45,0x80,0x00}, {0x40,0x08,0x00}},
356 .bootable
= ON_BOARD
,
359 .init_hwif
= init_hwif_opti621
,
362 .enablebits
= {{0x45,0x80,0x00}, {0x40,0x08,0x00}},
363 .bootable
= ON_BOARD
,
367 static int __devinit
opti621_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
369 return ide_setup_pci_device(dev
, &opti621_chipsets
[id
->driver_data
]);
372 static struct pci_device_id opti621_pci_tbl
[] = {
373 { PCI_VENDOR_ID_OPTI
, PCI_DEVICE_ID_OPTI_82C621
, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 0},
374 { PCI_VENDOR_ID_OPTI
, PCI_DEVICE_ID_OPTI_82C825
, PCI_ANY_ID
, PCI_ANY_ID
, 0, 0, 1},
377 MODULE_DEVICE_TABLE(pci
, opti621_pci_tbl
);
379 static struct pci_driver driver
= {
380 .name
= "Opti621_IDE",
381 .id_table
= opti621_pci_tbl
,
382 .probe
= opti621_init_one
,
385 static int __init
opti621_ide_init(void)
387 return ide_pci_register_driver(&driver
);
390 module_init(opti621_ide_init
);
392 MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
393 MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
394 MODULE_LICENSE("GPL");