2 * Copyright (C) 1996-1998 Linus Torvalds & authors (see below)
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.
12 * OPTi is trademark of OPTi, Octek is trademark of Octek.
14 * I used docs from OPTi databook, from ftp.opti.com, file 9123-0002.ps
15 * and disassembled/traced setupvic.exe (DOS program).
16 * It increases kernel code about 2 kB.
17 * I don't have this card no more, but I hope I can get some in case
18 * of needed development.
19 * My card is Octek PIDE 1.01 (on card) or OPTiViC (program).
20 * It has a place for a secondary connector in circuit, but nothing
21 * is there. Also BIOS says no address for
22 * secondary controller (see bellow in ide_init_opti621).
23 * I've only tested this on my system, which only has one disk.
24 * It's Western Digital WDAC2850, with PIO mode 3. The PCI bus
25 * is at 20 MHz (I have DX2/80, I tried PCI at 40, but I got random
26 * lockups). I tried the OCTEK double speed CD-ROM and
27 * it does not work! But I can't boot DOS also, so it's probably
28 * hardware fault. I have connected Conner 80MB, the Seagate 850MB (no
29 * problems) and Seagate 1GB (as slave, WD as master). My experiences
30 * with the third, 1GB drive: I got 3MB/s (hdparm), but sometimes
31 * it slows to about 100kB/s! I don't know why and I have
32 * not this drive now, so I can't try it again.
33 * I write this driver because I lost the paper ("manual") with
34 * settings of jumpers on the card and I have to boot Linux with
35 * Loadlin except LILO, cause I have to run the setupvic.exe program
36 * already or I get disk errors (my test: rpm -Vf
37 * /usr/X11R6/bin/XF86_SVGA - or any big file).
38 * Some numbers from hdparm -t /dev/hda:
39 * Timing buffer-cache reads: 32 MB in 3.02 seconds =10.60 MB/sec
40 * Timing buffered disk reads: 16 MB in 5.52 seconds = 2.90 MB/sec
41 * I have 4 Megs/s before, but I don't know why (maybe changes
43 * After release of 0.1, I got some successful reports, so it might work.
45 * The main problem with OPTi is that some timings for master
46 * and slave must be the same. For example, if you have master
47 * PIO 3 and slave PIO 0, driver have to set some timings of
48 * master for PIO 0. Second problem is that opti621_set_pio_mode
49 * got only one drive to set, but have to set both drives.
50 * This is solved in compute_pios. If you don't set
51 * the second drive, compute_pios use ide_get_best_pio_mode
52 * for autoselect mode (you can change it to PIO 0, if you want).
53 * If you then set the second drive to another PIO, the old value
54 * (automatically selected) will be overrided by yours.
55 * There is a 25/33MHz switch in configuration
56 * register, but driver is written for use at any frequency which get
57 * (use idebus=xx to select PCI bus speed).
59 * Version 0.1, Nov 8, 1996
60 * by Jaromir Koutek, for 2.1.8.
61 * Initial version of driver.
66 * Version 0.3, Nov 29, 1997
67 * by Mark Lord (probably), for 2.1.68
68 * Updates for use with new IDE block driver.
70 * Version 0.4, Dec 14, 1997
72 * Fixed some errors and cleaned the code.
74 * Version 0.5, Jan 2, 1998
76 * Updates for use with (again) new IDE block driver.
77 * Update of documentation.
79 * Version 0.6, Jan 2, 1999
81 * Reversed to version 0.3 of the driver, because
85 #define OPTI621_DEBUG /* define for debug messages */
87 #include <linux/types.h>
88 #include <linux/module.h>
89 #include <linux/kernel.h>
90 #include <linux/pci.h>
91 #include <linux/hdreg.h>
92 #include <linux/ide.h>
96 //#define OPTI621_MAX_PIO 3
97 /* In fact, I do not have any PIO 4 drive
98 * (address: 25 ns, data: 70 ns, recovery: 35 ns),
99 * but OPTi 82C621 is programmable and it can do (minimal values):
100 * on 40MHz PCI bus (pulse 25 ns):
101 * address: 25 ns, data: 25 ns, recovery: 50 ns;
102 * on 20MHz PCI bus (pulse 50 ns):
103 * address: 50 ns, data: 50 ns, recovery: 100 ns.
106 /* #define READ_PREFETCH 0 */
107 /* Uncomment for disable read prefetch.
108 * There is some readprefetch capatibility in hdparm,
109 * but when I type hdparm -P 1 /dev/hda, I got errors
110 * and till reset drive is inaccessible.
111 * This (hw) read prefetch is safe on my drive.
114 #ifndef READ_PREFETCH
115 #define READ_PREFETCH 0x40 /* read prefetch is enabled */
116 #endif /* else read prefetch is disabled */
118 #define READ_REG 0 /* index of Read cycle timing register */
119 #define WRITE_REG 1 /* index of Write cycle timing register */
120 #define CNTRL_REG 3 /* index of Control register */
121 #define STRAP_REG 5 /* index of Strap register */
122 #define MISC_REG 6 /* index of Miscellaneous register */
126 #define PIO_NOT_EXIST 254
127 #define PIO_DONT_KNOW 255
129 static DEFINE_SPINLOCK(opti621_lock
);
131 /* there are stored pio numbers from other calls of opti621_set_pio_mode */
132 static void compute_pios(ide_drive_t
*drive
, const u8 pio
)
133 /* Store values into drive->drive_data
134 * second_contr - 0 for primary controller, 1 for secondary
135 * slave_drive - 0 -> pio is for master, 1 -> pio is for slave
136 * pio - PIO mode for selected drive (for other we don't know)
140 ide_hwif_t
*hwif
= HWIF(drive
);
142 drive
->drive_data
= pio
;
144 for (d
= 0; d
< 2; ++d
) {
145 drive
= &hwif
->drives
[d
];
146 if (drive
->present
) {
147 if (drive
->drive_data
== PIO_DONT_KNOW
)
148 drive
->drive_data
= ide_get_best_pio_mode(drive
, 255, 3);
150 printk("%s: Selected PIO mode %d\n",
151 drive
->name
, drive
->drive_data
);
154 drive
->drive_data
= PIO_NOT_EXIST
;
159 static int cmpt_clk(int time
, int bus_speed
)
160 /* Returns (rounded up) time in clocks for time in ns,
161 * with bus_speed in MHz.
162 * Example: bus_speed = 40 MHz, time = 80 ns
163 * 1000/40 = 25 ns (clk value),
164 * 80/25 = 3.2, rounded up to 4 (I hope ;-)).
165 * Use idebus=xx to select right frequency.
168 return ((time
*bus_speed
+999)/1000);
171 /* Write value to register reg, base of register
172 * is at reg_base (0x1f0 primary, 0x170 secondary,
173 * if not changed by PCI configuration).
174 * This is from setupvic.exe program.
176 static void write_reg(u8 value
, int reg
)
180 outb(3, reg_base
+ 2);
181 outb(value
, reg_base
+ reg
);
182 outb(0x83, reg_base
+ 2);
185 /* Read value from register reg, base of register
186 * is at reg_base (0x1f0 primary, 0x170 secondary,
187 * if not changed by PCI configuration).
188 * This is from setupvic.exe program.
190 static u8
read_reg(int reg
)
196 outb(3, reg_base
+ 2);
197 ret
= inb(reg_base
+ reg
);
198 outb(0x83, reg_base
+ 2);
203 typedef struct pio_clocks_s
{
204 int address_time
; /* Address setup (clocks) */
205 int data_time
; /* Active/data pulse (clocks) */
206 int recovery_time
; /* Recovery time (clocks) */
209 static void compute_clocks(int pio
, pio_clocks_t
*clks
)
211 if (pio
!= PIO_NOT_EXIST
) {
212 int adr_setup
, data_pls
;
213 int bus_speed
= system_bus_clock();
215 adr_setup
= ide_pio_timings
[pio
].setup_time
;
216 data_pls
= ide_pio_timings
[pio
].active_time
;
217 clks
->address_time
= cmpt_clk(adr_setup
, bus_speed
);
218 clks
->data_time
= cmpt_clk(data_pls
, bus_speed
);
219 clks
->recovery_time
= cmpt_clk(ide_pio_timings
[pio
].cycle_time
220 - adr_setup
-data_pls
, bus_speed
);
221 if (clks
->address_time
< 1)
222 clks
->address_time
= 1;
223 if (clks
->address_time
> 4)
224 clks
->address_time
= 4;
225 if (clks
->data_time
< 1)
227 if (clks
->data_time
> 16)
228 clks
->data_time
= 16;
229 if (clks
->recovery_time
< 2)
230 clks
->recovery_time
= 2;
231 if (clks
->recovery_time
> 17)
232 clks
->recovery_time
= 17;
234 clks
->address_time
= 1;
236 clks
->recovery_time
= 2;
241 static void opti621_set_pio_mode(ide_drive_t
*drive
, const u8 pio
)
243 /* primary and secondary drives share some registers,
244 * so we have to program both drives
247 u8 pio1
= 0, pio2
= 0;
248 pio_clocks_t first
, second
;
250 u8 cycle1
, cycle2
, misc
;
251 ide_hwif_t
*hwif
= HWIF(drive
);
253 /* sets drive->drive_data for both drives */
254 compute_pios(drive
, pio
);
255 pio1
= hwif
->drives
[0].drive_data
;
256 pio2
= hwif
->drives
[1].drive_data
;
258 compute_clocks(pio1
, &first
);
259 compute_clocks(pio2
, &second
);
261 /* ax = max(a1,a2) */
262 ax
= (first
.address_time
< second
.address_time
) ? second
.address_time
: first
.address_time
;
264 drdy
= 2; /* DRDY is default 2 (by OPTi Databook) */
266 cycle1
= ((first
.data_time
-1)<<4) | (first
.recovery_time
-2);
267 cycle2
= ((second
.data_time
-1)<<4) | (second
.recovery_time
-2);
268 misc
= READ_PREFETCH
| ((ax
-1)<<4) | ((drdy
-2)<<1);
271 printk("%s: master: address: %d, data: %d, "
272 "recovery: %d, drdy: %d [clk]\n",
273 hwif
->name
, ax
, first
.data_time
,
274 first
.recovery_time
, drdy
);
275 printk("%s: slave: address: %d, data: %d, "
276 "recovery: %d, drdy: %d [clk]\n",
277 hwif
->name
, ax
, second
.data_time
,
278 second
.recovery_time
, drdy
);
281 spin_lock_irqsave(&opti621_lock
, flags
);
283 reg_base
= hwif
->io_ports
[IDE_DATA_OFFSET
];
285 /* allow Register-B */
286 outb(0xc0, reg_base
+ CNTRL_REG
);
287 /* hmm, setupvic.exe does this ;-) */
288 outb(0xff, reg_base
+ 5);
289 /* if reads 0xff, adapter not exist? */
290 (void)inb(reg_base
+ CNTRL_REG
);
291 /* if reads 0xc0, no interface exist? */
293 /* read version, probably 0 */
296 /* program primary drive */
297 /* select Index-0 for Register-A */
298 write_reg(0, MISC_REG
);
299 /* set read cycle timings */
300 write_reg(cycle1
, READ_REG
);
301 /* set write cycle timings */
302 write_reg(cycle1
, WRITE_REG
);
304 /* program secondary drive */
305 /* select Index-1 for Register-B */
306 write_reg(1, MISC_REG
);
307 /* set read cycle timings */
308 write_reg(cycle2
, READ_REG
);
309 /* set write cycle timings */
310 write_reg(cycle2
, WRITE_REG
);
312 /* use Register-A for drive 0 */
313 /* use Register-B for drive 1 */
314 write_reg(0x85, CNTRL_REG
);
316 /* set address setup, DRDY timings, */
317 /* and read prefetch for both drives */
318 write_reg(misc
, MISC_REG
);
320 spin_unlock_irqrestore(&opti621_lock
, flags
);
323 static void __devinit
opti621_port_init_devs(ide_hwif_t
*hwif
)
325 hwif
->drives
[0].drive_data
= PIO_DONT_KNOW
;
326 hwif
->drives
[1].drive_data
= PIO_DONT_KNOW
;
329 static const struct ide_port_ops opti621_port_ops
= {
330 .port_init_devs
= opti621_port_init_devs
,
331 .set_pio_mode
= opti621_set_pio_mode
,
334 static const struct ide_port_info opti621_chipsets
[] __devinitdata
= {
337 .enablebits
= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
338 .port_ops
= &opti621_port_ops
,
339 .host_flags
= IDE_HFLAG_TRUST_BIOS_FOR_DMA
,
340 .pio_mask
= ATA_PIO3
,
341 .swdma_mask
= ATA_SWDMA2
,
342 .mwdma_mask
= ATA_MWDMA2
,
345 .enablebits
= { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
346 .port_ops
= &opti621_port_ops
,
347 .host_flags
= IDE_HFLAG_TRUST_BIOS_FOR_DMA
,
348 .pio_mask
= ATA_PIO3
,
349 .swdma_mask
= ATA_SWDMA2
,
350 .mwdma_mask
= ATA_MWDMA2
,
354 static int __devinit
opti621_init_one(struct pci_dev
*dev
, const struct pci_device_id
*id
)
356 return ide_setup_pci_device(dev
, &opti621_chipsets
[id
->driver_data
]);
359 static const struct pci_device_id opti621_pci_tbl
[] = {
360 { PCI_VDEVICE(OPTI
, PCI_DEVICE_ID_OPTI_82C621
), 0 },
361 { PCI_VDEVICE(OPTI
, PCI_DEVICE_ID_OPTI_82C825
), 1 },
364 MODULE_DEVICE_TABLE(pci
, opti621_pci_tbl
);
366 static struct pci_driver driver
= {
367 .name
= "Opti621_IDE",
368 .id_table
= opti621_pci_tbl
,
369 .probe
= opti621_init_one
,
372 static int __init
opti621_ide_init(void)
374 return ide_pci_register_driver(&driver
);
377 module_init(opti621_ide_init
);
379 MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
380 MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
381 MODULE_LICENSE("GPL");