diff options
Diffstat (limited to 'drivers/ide/opti621.c')
| -rw-r--r-- | drivers/ide/opti621.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/drivers/ide/opti621.c b/drivers/ide/opti621.c new file mode 100644 index 00000000000..6048eda3cd6 --- /dev/null +++ b/drivers/ide/opti621.c @@ -0,0 +1,247 @@ +/* + * Copyright (C) 1996-1998 Linus Torvalds & authors (see below) + */ + +/* + * Authors: + * Jaromir Koutek <miri@punknet.cz>, + * Jan Harkes <jaharkes@cwi.nl>, + * Mark Lord <mlord@pobox.com> + * Some parts of code are from ali14xx.c and from rz1000.c. + * + * OPTi is trademark of OPTi, Octek is trademark of Octek. + * + * I used docs from OPTi databook, from ftp.opti.com, file 9123-0002.ps + * and disassembled/traced setupvic.exe (DOS program). + * It increases kernel code about 2 kB. + * I don't have this card no more, but I hope I can get some in case + * of needed development. + * My card is Octek PIDE 1.01 (on card) or OPTiViC (program). + * It has a place for a secondary connector in circuit, but nothing + * is there. Also BIOS says no address for + * secondary controller (see bellow in ide_init_opti621). + * I've only tested this on my system, which only has one disk. + * It's Western Digital WDAC2850, with PIO mode 3. The PCI bus + * is at 20 MHz (I have DX2/80, I tried PCI at 40, but I got random + * lockups). I tried the OCTEK double speed CD-ROM and + * it does not work! But I can't boot DOS also, so it's probably + * hardware fault. I have connected Conner 80MB, the Seagate 850MB (no + * problems) and Seagate 1GB (as slave, WD as master). My experiences + * with the third, 1GB drive: I got 3MB/s (hdparm), but sometimes + * it slows to about 100kB/s! I don't know why and I have + * not this drive now, so I can't try it again. + * I write this driver because I lost the paper ("manual") with + * settings of jumpers on the card and I have to boot Linux with + * Loadlin except LILO, cause I have to run the setupvic.exe program + * already or I get disk errors (my test: rpm -Vf + * /usr/X11R6/bin/XF86_SVGA - or any big file). + * Some numbers from hdparm -t /dev/hda: + * Timing buffer-cache reads: 32 MB in 3.02 seconds =10.60 MB/sec + * Timing buffered disk reads: 16 MB in 5.52 seconds = 2.90 MB/sec + * I have 4 Megs/s before, but I don't know why (maybe changes + * in hdparm test). + * After release of 0.1, I got some successful reports, so it might work. + * + * The main problem with OPTi is that some timings for master + * and slave must be the same. For example, if you have master + * PIO 3 and slave PIO 0, driver have to set some timings of + * master for PIO 0. Second problem is that opti621_set_pio_mode + * got only one drive to set, but have to set both drives. + * This is solved in compute_pios. If you don't set + * the second drive, compute_pios use ide_get_best_pio_mode + * for autoselect mode (you can change it to PIO 0, if you want). + * If you then set the second drive to another PIO, the old value + * (automatically selected) will be overrided by yours. + * There is a 25/33MHz switch in configuration + * register, but driver is written for use at any frequency. + * + * Version 0.1, Nov 8, 1996 + * by Jaromir Koutek, for 2.1.8. + * Initial version of driver. + * + * Version 0.2 + * Number 0.2 skipped. + * + * Version 0.3, Nov 29, 1997 + * by Mark Lord (probably), for 2.1.68 + * Updates for use with new IDE block driver. + * + * Version 0.4, Dec 14, 1997 + * by Jan Harkes + * Fixed some errors and cleaned the code. + * + * Version 0.5, Jan 2, 1998 + * by Jaromir Koutek + * Updates for use with (again) new IDE block driver. + * Update of documentation. + * + * Version 0.6, Jan 2, 1999 + * by Jaromir Koutek + * Reversed to version 0.3 of the driver, because + * 0.5 doesn't work. + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/ide.h> + +#include <asm/io.h> + +#define DRV_NAME "opti621" + +#define READ_REG 0 /* index of Read cycle timing register */ +#define WRITE_REG 1 /* index of Write cycle timing register */ +#define CNTRL_REG 3 /* index of Control register */ +#define STRAP_REG 5 /* index of Strap register */ +#define MISC_REG 6 /* index of Miscellaneous register */ + +static int reg_base; + +static DEFINE_SPINLOCK(opti621_lock); + +/* Write value to register reg, base of register + * is at reg_base (0x1f0 primary, 0x170 secondary, + * if not changed by PCI configuration). + * This is from setupvic.exe program. + */ +static void write_reg(u8 value, int reg) +{ + inw(reg_base + 1); + inw(reg_base + 1); + outb(3, reg_base + 2); + outb(value, reg_base + reg); + outb(0x83, reg_base + 2); +} + +/* Read value from register reg, base of register + * is at reg_base (0x1f0 primary, 0x170 secondary, + * if not changed by PCI configuration). + * This is from setupvic.exe program. + */ +static u8 read_reg(int reg) +{ + u8 ret = 0; + + inw(reg_base + 1); + inw(reg_base + 1); + outb(3, reg_base + 2); + ret = inb(reg_base + reg); + outb(0x83, reg_base + 2); + + return ret; +} + +static void opti621_set_pio_mode(ide_drive_t *drive, const u8 pio) +{ + ide_hwif_t *hwif = drive->hwif; + ide_drive_t *pair = ide_get_pair_dev(drive); + unsigned long flags; + u8 tim, misc, addr_pio = pio, clk; + + /* DRDY is default 2 (by OPTi Databook) */ + static const u8 addr_timings[2][5] = { + { 0x20, 0x10, 0x00, 0x00, 0x00 }, /* 33 MHz */ + { 0x10, 0x10, 0x00, 0x00, 0x00 }, /* 25 MHz */ + }; + static const u8 data_rec_timings[2][5] = { + { 0x5b, 0x45, 0x32, 0x21, 0x20 }, /* 33 MHz */ + { 0x48, 0x34, 0x21, 0x10, 0x10 } /* 25 MHz */ + }; + + drive->drive_data = XFER_PIO_0 + pio; + + if (pair) { + if (pair->drive_data && pair->drive_data < drive->drive_data) + addr_pio = pair->drive_data - XFER_PIO_0; + } + + spin_lock_irqsave(&opti621_lock, flags); + + reg_base = hwif->io_ports.data_addr; + + /* allow Register-B */ + outb(0xc0, reg_base + CNTRL_REG); + /* hmm, setupvic.exe does this ;-) */ + outb(0xff, reg_base + 5); + /* if reads 0xff, adapter not exist? */ + (void)inb(reg_base + CNTRL_REG); + /* if reads 0xc0, no interface exist? */ + read_reg(CNTRL_REG); + + /* check CLK speed */ + clk = read_reg(STRAP_REG) & 1; + + printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33); + + tim = data_rec_timings[clk][pio]; + misc = addr_timings[clk][addr_pio]; + + /* select Index-0/1 for Register-A/B */ + write_reg(drive->dn & 1, MISC_REG); + /* set read cycle timings */ + write_reg(tim, READ_REG); + /* set write cycle timings */ + write_reg(tim, WRITE_REG); + + /* use Register-A for drive 0 */ + /* use Register-B for drive 1 */ + write_reg(0x85, CNTRL_REG); + + /* set address setup, DRDY timings, */ + /* and read prefetch for both drives */ + write_reg(misc, MISC_REG); + + spin_unlock_irqrestore(&opti621_lock, flags); +} + +static const struct ide_port_ops opti621_port_ops = { + .set_pio_mode = opti621_set_pio_mode, +}; + +static const struct ide_port_info opti621_chipset __devinitdata = { + .name = DRV_NAME, + .enablebits = { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} }, + .port_ops = &opti621_port_ops, + .host_flags = IDE_HFLAG_NO_DMA, + .pio_mask = ATA_PIO4, +}; + +static int __devinit opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + return ide_pci_init_one(dev, &opti621_chipset, NULL); +} + +static const struct pci_device_id opti621_pci_tbl[] = { + { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 }, + { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 0 }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, opti621_pci_tbl); + +static struct pci_driver opti621_pci_driver = { + .name = "Opti621_IDE", + .id_table = opti621_pci_tbl, + .probe = opti621_init_one, + .remove = ide_pci_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init opti621_ide_init(void) +{ + return ide_pci_register_driver(&opti621_pci_driver); +} + +static void __exit opti621_ide_exit(void) +{ + pci_unregister_driver(&opti621_pci_driver); +} + +module_init(opti621_ide_init); +module_exit(opti621_ide_exit); + +MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord"); +MODULE_DESCRIPTION("PCI driver module for Opti621 IDE"); +MODULE_LICENSE("GPL"); |