Hi!
For all of you who had problems getting the VIA IDE driver to work
correctly on the 686b, here is a driver that should work with those
chips, even in UDMA 100 mode. I've not tested it, because I don't have
the 686b myself. So it may eat your filesystem as well.
Good luck!
-- Vojtech Pavlik SuSE Labs--sm4nu43k4a2Rpi4c Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="ide-timing.h"
#ifndef _IDE_TIMING_H #define _IDE_TIMING_H
/* * $Id: ide-timing.h,v 1.4 2000/10/02 20:48:56 vojtech Exp $ * * Copyright (c) 1999-2000 Vojtech Pavlik * * Sponsored by SuSE */
/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */
#include <linux/hdreg.h>
#ifndef XFER_PIO_5 #define XFER_PIO_5 0x0d #endif
struct ide_timing { short mode; short setup; /* t1 */ short act8b; /* t2 for 8-bit io */ short rec8b; /* t2i for 8-bit io */ short cyc8b; /* t0 for 8-bit io */ short active; /* t2 or tD */ short recover; /* t2i or tK */ short cycle; /* t0 */ short udma; /* t2CYCTYP/2 */ };
/* * PIO 0-5, MWDMA 0-2 and UDMA 0-5 timings (in nanoseconds). * These were taken from ATA/ATAPI-6 standard, rev 0a, except * for PIO 5, which is a nonstandard extension. */
static struct ide_timing ide_timing[] = {
{ XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 20 }, { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 30 }, { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 45 },
{ XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 60 }, { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 80 }, { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 120 }, { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 120, 0 }, { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 150, 0 }, { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 480, 0 }, { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 240, 0 }, { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 480, 0 }, { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 960, 0 },
{ XFER_PIO_5, 20, 50, 30, 100, 50, 30, 100, 0 }, { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 120, 0 }, { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 180, 0 },
{ XFER_PIO_2, 30, 290, 40, 330, 100, 90, 240, 0 }, { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 383, 0 }, { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 600, 0 },
{ XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 960, 0 },
{ -1 } };
#define IDE_TIMING_SETUP 0x01 #define IDE_TIMING_ACT8B 0x02 #define IDE_TIMING_REC8B 0x04 #define IDE_TIMING_CYC8B 0x08 #define IDE_TIMING_8BIT 0x0e #define IDE_TIMING_ACTIVE 0x10 #define IDE_TIMING_RECOVER 0x20 #define IDE_TIMING_CYCLE 0x40 #define IDE_TIMING_UDMA 0x80 #define IDE_TIMING_ALL 0xff
#define MIN(a,b) ((a)<(b)?(a):(b)) #define MAX(a,b) ((a)>(b)?(a):(b)) #define FIT(v,min,max) MAX(MIN(v,max),min) #define ENOUGH(v,unit) (((v)-1)/(unit)+1) #define EZ(v,unit) ((v)?ENOUGH(v,unit):0)
#define XFER_MODE 0xf0 #define XFER_UDMA_100 0x44 #define XFER_UDMA_66 0x42 #define XFER_UDMA 0x40 #define XFER_MWDMA 0x20 #define XFER_SWDMA 0x10 #define XFER_EPIO 0x01 #define XFER_PIO 0x00
static short ide_find_best_mode(ide_drive_t *drive, int map) { struct hd_driveid *id = drive->id; short best = 0;
if (!id) return XFER_PIO_SLOW;
if ((map & XFER_UDMA) && (id->field_valid & 4)) { /* Want UDMA and UDMA bitmap valid */
if ((map & XFER_UDMA_100) == XFER_UDMA_100) if ((best = (id->dma_ultra & 0x0020) ? XFER_UDMA_5 : 0)) return best;
if ((map & XFER_UDMA_66) == XFER_UDMA_66) if ((best = (id->dma_ultra & 0x0010) ? XFER_UDMA_4 : (id->dma_ultra & 0x0008) ? XFER_UDMA_3 : 0)) return best;
if ((best = (id->dma_ultra & 0x0004) ? XFER_UDMA_2 : (id->dma_ultra & 0x0002) ? XFER_UDMA_1 : (id->dma_ultra & 0x0001) ? XFER_UDMA_0 : 0)) return best; }
if ((map & XFER_MWDMA) && (id->field_valid & 2)) { /* Want MWDMA and drive has EIDE fields */
if ((best = (id->dma_mword & 0x0004) ? XFER_MW_DMA_2 : (id->dma_mword & 0x0002) ? XFER_MW_DMA_1 : (id->dma_mword & 0x0001) ? XFER_MW_DMA_0 : 0)) return best; }
if (map & XFER_SWDMA) { /* Want SWDMA */
if (id->field_valid & 2) { /* EIDE SWDMA */
if ((best = (id->dma_1word & 0x0004) ? XFER_SW_DMA_2 : (id->dma_1word & 0x0002) ? XFER_SW_DMA_1 : (id->dma_1word & 0x0001) ? XFER_SW_DMA_0 : 0)) return best; }
if (id->capability & 1) { /* Pre-EIDE style SWDMA */
if ((best = (id->tDMA == 2) ? XFER_SW_DMA_2 : (id->tDMA == 1) ? XFER_SW_DMA_1 : (id->tDMA == 0) ? XFER_SW_DMA_0 : 0)) return best; } }
if ((map & XFER_EPIO) && (id->field_valid & 2)) { /* EIDE PIO modes */
if ((best = (drive->id->eide_pio_modes & 4) ? XFER_PIO_5 : (drive->id->eide_pio_modes & 2) ? XFER_PIO_4 : (drive->id->eide_pio_modes & 1) ? XFER_PIO_3 : 0)) return best; } return (drive->id->tPIO == 2) ? XFER_PIO_2 : (drive->id->tPIO == 1) ? XFER_PIO_1 : (drive->id->tPIO == 0) ? XFER_PIO_0 : XFER_PIO_SLOW; }
static void ide_timing_quantize(struct ide_timing *t, struct ide_timing *q, int T, int UT) { q->setup = EZ(t->setup, T); q->act8b = EZ(t->act8b, T); q->rec8b = EZ(t->rec8b, T); q->cyc8b = EZ(t->cyc8b, T); q->active = EZ(t->active, T); q->recover = EZ(t->recover, T); q->cycle = EZ(t->cycle, T); q->udma = EZ(t->udma, UT); }
static void ide_timing_merge(struct ide_timing *a, struct ide_timing *b, struct ide_timing *m, unsigned int what) { if (what & IDE_TIMING_SETUP ) m->setup = MAX(a->setup, b->setup); if (what & IDE_TIMING_ACT8B ) m->act8b = MAX(a->act8b, b->act8b); if (what & IDE_TIMING_REC8B ) m->rec8b = MAX(a->rec8b, b->rec8b); if (what & IDE_TIMING_CYC8B ) m->cyc8b = MAX(a->cyc8b, b->cyc8b); if (what & IDE_TIMING_ACTIVE ) m->active = MAX(a->active, b->active); if (what & IDE_TIMING_RECOVER) m->recover = MAX(a->recover, b->recover); if (what & IDE_TIMING_CYCLE ) m->cycle = MAX(a->cycle, b->cycle); if (what & IDE_TIMING_UDMA ) m->udma = MAX(a->udma, b->udma); }
static struct ide_timing* ide_timing_find_mode(short speed) { struct ide_timing *t;
for (t = ide_timing; t->mode != speed; t++) if (t->mode < 0) return NULL; return t; }
static int ide_timing_compute(ide_drive_t *drive, short speed, struct ide_timing *t, int T, int UT) { struct hd_driveid *id = drive->id; struct ide_timing *s, p;
/* * Find the mode. */
if (!(s = ide_timing_find_mode(speed))) return -EINVAL;
/* * If the drive is an EIDE drive, it can tell us it needs extended * PIO/MWDMA cycle timing. */
if (id && id->field_valid & 2) { /* EIDE drive */
memset(&p, 0, sizeof(p));
switch (speed & XFER_MODE) {
case XFER_PIO: if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = id->eide_pio; else p.cycle = p.cyc8b = id->eide_pio_iordy; break;
case XFER_MWDMA: p.cycle = id->eide_dma_min; break; }
ide_timing_merge(&p, t, t, IDE_TIMING_CYCLE | IDE_TIMING_CYC8B); }
/* * Convert the timing to bus clock counts. */
ide_timing_quantize(s, t, T, UT);
/* * Even in DMA/UDMA modes we still use PIO access for IDENTIFY, S.M.A.R.T * and some other commands. We have to ensure that the DMA cycle timing is * slower/equal than the fastest PIO timing. */
if ((speed & XFER_MODE) != XFER_PIO) { ide_timing_compute(drive, ide_find_best_mode(drive, XFER_PIO | XFER_EPIO), &p, T, UT); ide_timing_merge(&p, t, t, IDE_TIMING_ALL); }
/* * Lenghten active & recovery time so that cycle time is correct. */
if (t->act8b + t->rec8b < t->cyc8b) { t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2; t->rec8b = t->cyc8b - t->act8b; }
if (t->active + t->recover < t->cycle) { t->active += (t->cycle - (t->active + t->recover)) / 2; t->recover = t->cycle - t->active; }
return 0; }
#endif
--sm4nu43k4a2Rpi4c Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="via82cxxx.c"
/* * $Id: via82cxxx.c,v 3.11 2001/01/10 12:33:60 vojtech Exp $ * * Copyright (c) 2000 Vojtech Pavlik * * Based on the work of: * Michel Aubry * Jeff Garzik * Andre Hedrick * * Sponsored by SuSE */
/* * VIA IDE driver for Linux. Supports * * vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233 * * southbridges, which can be found in * * VIA Apollo VP, VPX, VPX/97, VP2, VP2/97, VP3, MVP3, MVP4, P6, Pro, * Pro Plus, Pro 133, Pro 133A, ProMedia PM601, ProSavage PM133, PLE133, * Pro 266, KX133, KT133, ProSavage KM133, KT133A, KT266 * PC-Chips VXPro, VXPro+, TXPro-III, TXPro-AGP, ViaGra, BXToo, BXTel * AMD 640, 640 AGP, 750 IronGate * ETEQ 6618, 6628, 6638 * Micron Samurai * * chipsets. Supports * * PIO 0-5, MWDMA 0-2, SWDMA 0-2 and UDMA 0-5 * * (this includes UDMA33, 66 and 100) modes. UDMA66 and higher modes are * autodetected only in case the BIOS has detected a 80 wire cable. To ignore * the BIOS data, use 'ide0=ata66' or 'ide1=ata66' on the kernel command line. * You may also need to configure the kernel IDE driver to ignore byte93 UDMA66 * enable bits if your drives don't use them correctly to achieve UDMA66/100 * operation. */
/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Should you need to contact me, the author, you can do so either by * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail: * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic */
#include <linux/config.h> #include <linux/kernel.h> #include <linux/ioport.h> #include <linux/blkdev.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/ide.h> #include <asm/io.h>
#include "ide-timing.h"
#define VIA_IDE_ENABLE 0x40 #define VIA_IDE_CONFIG 0x41 #define VIA_FIFO_CONFIG 0x43 #define VIA_MISC_1 0x44 #define VIA_MISC_2 0x45 #define VIA_MISC_3 0x46 #define VIA_DRIVE_TIMING 0x48 #define VIA_8BIT_TIMING 0x4e #define VIA_ADDRESS_SETUP 0x4c #define VIA_UDMA_TIMING 0x50
#define VIA_UDMA 0x07 #define VIA_UDMA_NONE 0x00 #define VIA_UDMA_33 0x01 #define VIA_UDMA_66 0x02 #define VIA_UDMA_100 0x03 #define VIA_FIFO_SIZE 0x08 #define VIA_THR0_3041 0x10 #define VIA_THR0_RMI 0x20 #define VIA_CMDTIME 0x40
/* * VIA SouthBridge chips. */
static struct via_isa_bridge { char *name; unsigned short id; unsigned char rev; unsigned char flags; } via_isa_bridges[] = { { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, VIA_UDMA_100 }, { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, VIA_UDMA_66 }, { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, VIA_UDMA_100 | VIA_FIFO_SIZE }, { "vt82c686a (cf/cg)", PCI_DEVICE_ID_VIA_82C686, 0x20, VIA_UDMA_66 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c686a (cd/ce)", PCI_DEVICE_ID_VIA_82C686, 0x10, VIA_UDMA_66 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, VIA_UDMA_66 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c596b (cf/cg)", PCI_DEVICE_ID_VIA_82C596, 0x20, VIA_UDMA_66 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c596b (cd/ce)", PCI_DEVICE_ID_VIA_82C596, 0x10, VIA_UDMA_66 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, VIA_UDMA_33 | VIA_CMDTIME | VIA_THR0_RMI }, { "vt82c586b (3041)", PCI_DEVICE_ID_VIA_82C586_0, 0x40, VIA_UDMA_33 | VIA_CMDTIME | VIA_FIFO_SIZE | VIA_THR0_3041}, { "vt82c586b (3040)", PCI_DEVICE_ID_VIA_82C586_0, 0x30, VIA_UDMA_33 | VIA_CMDTIME | VIA_FIFO_SIZE }, { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, VIA_UDMA_33 | VIA_CMDTIME | VIA_FIFO_SIZE }, { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, VIA_UDMA_NONE | VIA_CMDTIME }, { NULL } };
static struct via_isa_bridge *via_config; static unsigned char via_enabled; static unsigned int via_80w;
/* * VIA /proc entry. */
#ifdef CONFIG_PROC_FS
#include <linux/stat.h> #include <linux/proc_fs.h>
int via_proc, via_base; static struct pci_dev *bmide_dev, *isa_dev; extern int (*via_display_info)(char *, char **, off_t, int); /* ide-proc.c */
static char *via_control3[] = { "No limit", "64", "128", "192" };
#define via_print(format, arg...) p += sprintf(p, format "\n" , ## arg) #define via_print_drive(name, format, arg...)\ p += sprintf(p, name); for (i = 0; i < 4; i++) p += sprintf(p, format, ## arg); p += sprintf(p, "\n");
static int via_get_info(char *buffer, char **addr, off_t offset, int count) { short pci_clock, speed[4], cycle[4], setup[4], active[4], recover[4], uen[4], udma[4], active8b[4], recover8b[4]; struct pci_dev *dev = bmide_dev; unsigned int v, u, i; unsigned short c, w; unsigned char t, x; char *p = buffer;
via_print("----------VIA BusMastering IDE Configuration----------------");
via_print("Driver Version: 3.11"); via_print("South Bridge: VIA %s", via_config->name);
pci_read_config_byte(isa_dev, PCI_REVISION_ID, &t); pci_read_config_byte(dev, PCI_REVISION_ID, &x); via_print("Revision: ISA %#x IDE %#x", t, x);
via_print("BM-DMA base: %#x", via_base); via_print("PCI clock: %dMHz", pci_clock = system_bus_clock());
pci_read_config_byte(dev, VIA_MISC_1, &t); via_print("Master Read Cycle IRDY: %dws", (t & 64) >> 6); via_print("Master Write Cycle IRDY: %dws", (t & 32) >> 5); via_print("BM IDE Status Register Read Retry: %s", (t & 8) ? "yes" : "no");
pci_read_config_byte(dev, VIA_MISC_3, &t); via_print("Max DRDY Pulse Width: %s%s", via_control3[(t & 0x03)], (t & 0x03) ? " PCI clocks" : "");
via_print("-----------------------Primary IDE-------Secondary IDE------"); via_print("Read DMA FIFO flush: %10s%20s", (t & 0x80) ? "yes" : "no", (t & 0x40) ? "yes" : "no"); via_print("End Sector FIFO flush: %10s%20s", (t & 0x20) ? "yes" : "no", (t & 0x10) ? "yes" : "no");
pci_read_config_byte(dev, VIA_IDE_CONFIG, &t); via_print("Prefetch Buffer: %10s%20s", (t & 0x80) ? "yes" : "no", (t & 0x20) ? "yes" : "no"); via_print("Post Write Buffer: %10s%20s", (t & 0x40) ? "yes" : "no", (t & 0x10) ? "yes" : "no");
pci_read_config_byte(dev, VIA_IDE_ENABLE, &t); via_print("Enabled: %10s%20s", (t & 0x02) ? "yes" : "no", (t & 0x01) ? "yes" : "no");
c = inb(via_base + 0x02) | (inb(via_base + 0x0a) << 8); via_print("Simplex only: %10s%20s", (c & 0x80) ? "yes" : "no", (c & 0x8000) ? "yes" : "no");
via_print("Cable Type: %10s%20s", (via_80w & 1) ? "80w" : "40w", (via_80w & 2) ? "80w" : "40w");
via_print("-------------------drive0----drive1----drive2----drive3-----");
pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t); pci_read_config_dword(dev, VIA_DRIVE_TIMING, &v); pci_read_config_word(dev, VIA_8BIT_TIMING, &w);
if (via_config->flags & VIA_UDMA) pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); else u = 0;
for (i = 0; i < 4; i++) { setup[i] = ((t >> ((3 - i) << 1)) & 0x3) + 1; recover8b[i] = ((w >> ((1 - (i >> 1)) << 3)) & 0xf) + 1; active8b[i] = ((w >> (((1 - (i >> 1)) << 3) + 4)) & 0xf) + 1; active[i] = ((v >> (((3 - i) << 3) + 4)) & 0xf) + 1; recover[i] = ((v >> ((3 - i) << 3)) & 0xf) + 1;
udma[i] = (((u >> ((3 - i) << 3)) & 0x7) + 2) * (((via_config->flags & VIA_UDMA) == VIA_UDMA_100) ? 2 : (((u >> (((3 - i) & 2) << 3)) & 0x8) ? 3 : 6)); uen[i] = ((u >> ((3 - i) << 3)) & 0x20) ? 1 : 0;
speed[i] = 120 * pci_clock / (uen[i] ? udma[i] : (active[i] + recover[i]) * 6); cycle[i] = 1000 / pci_clock * (uen[i] ? udma[i] : (active[i] + recover[i]) * 6) / 6; }
via_print_drive("Transfer Mode: ", "%10s", (c & ((i & 1) ? 0x40 : 0x20) << ((i & 2) << 2)) ? (uen[i] ? "UDMA" : "DMA") : "PIO");
via_print_drive("Address Setup: ", "%8dns", (1000 / pci_clock) * setup[i]); via_print_drive("Cmd Active: ", "%8dns", (1000 / pci_clock) * active8b[i]); via_print_drive("Cmd Recovery: ", "%8dns", (1000 / pci_clock) * recover8b[i]); via_print_drive("Data Active: ", "%8dns", (1000 / pci_clock) * active[i]); via_print_drive("Data Recovery: ", "%8dns", (1000 / pci_clock) * recover[i]); via_print_drive("Cycle Time: ", "%8dns", cycle[i]); via_print_drive("Transfer Rate: ", "%4d.%dMB/s", speed[i] / 10, speed[i] % 10);
return p - buffer; /* hoping it is less than 4K... */ }
#endif
/* * via_set_speed() writes timing values to the chipset registers */
static void via_set_speed(struct pci_dev *dev, unsigned char dn, struct ide_timing *timing) { unsigned char t;
pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t); t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1)); pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
if (via_config->flags & VIA_CMDTIME) pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)), ((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn), ((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));
switch(via_config->flags & VIA_UDMA) { case VIA_UDMA_33: t = timing->udma ? (0xe0 | (FIT(timing->udma, 2, 5) - 2)) : 0x03; break; case VIA_UDMA_66: t = timing->udma ? (0xe8 | (FIT(timing->udma, 2, 9) - 2)) : 0x0f; break; case VIA_UDMA_100: t = timing->udma ? (0xf0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break; default: return; }
pci_write_config_byte(dev, VIA_UDMA_TIMING + (3 - dn), t); }
/* * via_set_drive() computes timing values configures the drive and * the chipset to a desired transfer mode. It also can be called * by upper layers. */
static int via_set_drive(ide_drive_t *drive, unsigned char speed) { ide_drive_t *peer = HWIF(drive)->drives + (~drive->dn & 1); struct ide_timing t, p; int err, T, UT;
if (speed != XFER_PIO_SLOW && speed != drive->current_speed) if ((err = ide_config_drive_speed(drive, speed))) return err;
T = 1000 / system_bus_clock(); UT = T / MAX(via_config->flags & VIA_UDMA, 1);
ide_timing_compute(drive, speed, &t, T, UT);
if (peer->present) { ide_timing_compute(peer, peer->current_speed, &p, T, UT); ide_timing_merge(&p, &t, &t, IDE_TIMING_8BIT); }
via_set_speed(HWIF(drive)->pci_dev, drive->dn, &t);
if (!drive->init_speed) drive->init_speed = speed; drive->current_speed = speed;
return 0; }
/* * via82cxxx_tune_drive() is a callback from upper layers for * PIO-only tuning. */
static void via82cxxx_tune_drive(ide_drive_t *drive, unsigned char pio) { if (!((via_enabled >> HWIF(drive)->channel) & 1)) return;
if (pio == 255) { via_set_drive(drive, ide_find_best_mode(drive, XFER_PIO | XFER_EPIO)); return; }
via_set_drive(drive, XFER_PIO_0 + MIN(pio, 5)); }
#ifdef CONFIG_BLK_DEV_IDEDMA
/* * via82cxxx_dmaproc() is a callback from upper layers that can do * a lot, but we use it for DMA/PIO tuning only, delegating everything * else to the default ide_dmaproc(). */
int via82cxxx_dmaproc(ide_dma_action_t func, ide_drive_t *drive) {
if (func == ide_dma_check) {
short w80 = eighty_ninty_three(drive);
short speed = ide_find_best_mode(drive, XFER_PIO | XFER_EPIO | XFER_SWDMA | XFER_MWDMA | (via_config->flags & VIA_UDMA ? XFER_UDMA : 0) | (w80 && (via_config->flags & VIA_UDMA) == VIA_UDMA_66 ? XFER_UDMA_66 : 0) | (w80 && (via_config->flags & VIA_UDMA) == VIA_UDMA_100 ? XFER_UDMA_100 : 0));
func = ((speed & XFER_MODE) != XFER_PIO) ? ide_dma_on : ide_dma_off_quietly;
if (via_set_drive(drive, speed)) func = ide_dma_off; }
return ide_dmaproc(func, drive); }
#endif /* CONFIG_BLK_DEV_IDEDMA */
/* * The initialization callback. Here we determine the IDE chip type * and initialize its drive independent registers. */
unsigned int __init pci_init_via82cxxx(struct pci_dev *dev, const char *name) { struct pci_dev *isa = NULL; unsigned char t, v; unsigned int u; int i;
/* * Find ISA bridge to see how good the IDE is. */
for (via_config = via_isa_bridges; via_config->id; via_config++) if ((isa = pci_find_device(PCI_VENDOR_ID_VIA, via_config->id, NULL))) { pci_read_config_byte(isa, PCI_REVISION_ID, &t); if (t >= via_config->rev) break; }
if (!via_config->id) { printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, contact Vojtech Pavlik <vojtech@suse.cz>\n"); return -ENODEV; }
/* * Check 80-wire cable presence. */
switch (via_config->flags & VIA_UDMA) {
case VIA_UDMA_100:
pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); for (i = 24; i >= 0; i -= 8) if ((u >> i) & 0x10) /* BIOS 80-wire bit enabled */ via_80w |= (1 << (1 - (i >> 4))); break;
case VIA_UDMA_66: pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); pci_write_config_dword(dev, VIA_UDMA_TIMING, u | 0x80008); for (i = 24; i >= 0; i -= 8) if (((u >> (i & 16)) & 8) && (((u >> i) & 7) < 2)) /* 2x PCI clock && less than 3T/cycle */ via_80w |= (1 << (1 - (i >> 4))); break; }
pci_read_config_byte(dev, VIA_IDE_ENABLE, &v); via_enabled = ((v & 1) ? 2 : 0) | ((v & 2) ? 1 : 0);
/* * Set up FIFO sizes and thresholds. */
pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t);
if (via_config->flags & VIA_FIFO_SIZE) {
t = (t & 0x90) | 0x0a; /* 50% FIFO threshold */ switch (via_enabled) { case 1: t |= 0x00; break; /* all on primary */ case 2: t |= 0x60; break; /* all on secondary */ case 3: t |= 0x20; break; /* fifo evenly distributed */ }
} else t = (t & 0xf0) | 0x0a;
pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
/* * Set up the rest of FIFO stuff. */
pci_read_config_byte(dev, VIA_IDE_CONFIG, &t); pci_write_config_byte(dev, VIA_IDE_CONFIG, t | 0xf0); /* prefetch & postwrite */
if (via_config->flags & VIA_THR0_3041) { pci_read_config_byte(dev, VIA_MISC_1, &t); /* 0% FIFO threshold */ pci_write_config_byte(dev, VIA_MISC_1, t | 0x03); }
if (via_config->flags & VIA_THR0_RMI) { pci_read_config_byte(dev, VIA_MISC_2, &t); /* 0% FIFO threshold, fast memory */ pci_write_config_byte(dev, VIA_MISC_2, (t & 0xf0) | 0x03); }
pci_read_config_byte(dev, VIA_MISC_3, &t); pci_write_config_byte(dev, VIA_MISC_3, t | 0xf0); /* enable FIFO flushing */
/* * Print the boot message. */
printk(KERN_INFO "VP_IDE: VIA %s IDE %s controller on pci%d:%d.%d\n", via_config->name, (via_config->flags & VIA_UDMA) == VIA_UDMA_100 ? "UDMA100" : (via_config->flags & VIA_UDMA) == VIA_UDMA_66 ? "UDMA66" : (via_config->flags & VIA_UDMA) == VIA_UDMA_33 ? "UDMA33" : "MWDMA16", dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); /* * Register /proc/ide/via entry */
#ifdef CONFIG_PROC_FS if (!via_proc) { for (i = 0; i < 6; i++) if (pci_resource_flags(dev, i) & IORESOURCE_IO) break; via_base = pci_resource_start(dev, i); bmide_dev = dev; isa_dev = isa; via_display_info = &via_get_info; via_proc = 1;
} #endif
return 0; }
unsigned int __init ata66_via82cxxx(ide_hwif_t *hwif) { return ((via_enabled & via_80w) >> hwif->channel) & 1; }
void __init ide_init_via82cxxx(ide_hwif_t *hwif) { int i;
hwif->tuneproc = &via82cxxx_tune_drive; hwif->speedproc = &via_set_drive; hwif->autodma = 0;
for (i = 0; i < 2; i++) { hwif->drives[i].io_32bit = 1; hwif->drives[i].unmask = 1; hwif->drives[i].autotune = 1; hwif->drives[i].dn = hwif->channel * 2 + i; }
#ifdef CONFIG_BLK_DEV_IDEDMA if (hwif->dma_base) { hwif->dmaproc = &via82cxxx_dmaproc; hwif->autodma = 1; } #endif /* CONFIG_BLK_DEV_IDEDMA */ }
/* * We allow the BM-DMA driver only work on enabled interfaces. */
void __init ide_dmacapable_via82cxxx(ide_hwif_t *hwif, unsigned long dmabase) { if ((via_enabled >> hwif->channel) & 1) ide_setup_dma(hwif, dmabase, 8); }
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