Messages in this thread |  | | Date | Sun, 17 Sep 2000 12:59:49 +0200 | From | Vojtech Pavlik <> | Subject | VIA IDE v3.0 preview |
| |
Hi!
For those who are interested in testing my VIA IDE code, here is another release that configures the thing even better. IDE timing is black magic. ;) It's a drop-in replacement for the 2.1 driver.
I'm interested in failure/success reports.
Thanks.
-- Vojtech Pavlik SuSE Labs #ifndef _IDE_TIMING_H #define _IDE_TIMING_H
/* * $Id: ide-timing.h,v 1.0 2000/09/17 00:34:56 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) if ((best = (id->dma_ultra & 0x0020) ? XFER_UDMA_5 : 0)) return best;
if (map & 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 and compute base timing. */
if (!(s = ide_timing_find_mode(speed))) return -EINVAL;
ide_timing_quantize(s, t, T, UT);
/* * If the drive is an EIDE drive, it can tell us it needs extended * PIO/MWDMA cycle timing. For MWDMA it also specifies recommended * cycle timing. */
if (id && id->field_valid & 2) { /* EIDE drive */
switch (speed & XFER_MODE) {
case XFER_PIO:
if (speed <= XFER_PIO_2) { t->cyc8b = MAX(t->cyc8b, ENOUGH(id->eide_pio, T)); t->cycle = MAX(t->cycle, ENOUGH(id->eide_pio, T)); break; }
t->cyc8b = MAX(t->cyc8b, ENOUGH(id->eide_pio_iordy, T)); t->cycle = MAX(t->cycle, ENOUGH(id->eide_pio_iordy, T)); break;
case XFER_MWDMA:
t->cycle = MAX(t->cycle, id->eide_dma_time / T); t->cycle = MAX(t->cycle, ENOUGH(id->eide_dma_min, T)); break; } }
/* * 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 /* * $Id: via82cxxx.c,v 3.0 2000/09/17 12:52:60 vojtech Exp $ * * Copyright (c) 2000 Vojtech Pavlik * * Based on the work of: * Michel Aubry * Jeff Garzik * Andre Hedrick * * Sponsored by SuSE */
/* * VIA vt82c586 IDE driver for Linux. Supports * * vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, vt82c686a, vt8231 * * southbridges, which can be found in * * VIA Apollo VP, VPX, VPX/97, VP2, VP2/97, VP3, MVP3, MVP4, Pro, Pro Plus, * Pro 133, Pro 133A, ProMedia 601, ProSavage 605, ProSavage PM133, KX133, KT133 * 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 * * (includes UDMA33, 66 and 100) modes. UDMA100 isn't possible * on any of the supported chipsets yet. UDMA66 and higher modes are * autodetected only in case the BIOS has enabled them. To force UDMA66, * use 'ide0=ata66' or 'ide1=ata66' on the kernel command line. */
/* * 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/types.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/ioport.h> #include <linux/interrupt.h> #include <linux/blkdev.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/ide.h> #include <asm/io.h>
#include "ide-timing.h"
#define VIA_BM_BASE 0x20 #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_PRI_SECTOR_SIZE 0x60 #define VIA_SEC_SECTOR_SIZE 0x68
#define VIA_UDMA_NONE 0 #define VIA_UDMA_33 1 #define VIA_UDMA_66 2 #define VIA_UDMA_100 3
/* * VIA SouthBridge chips. */
static struct via_isa_bridge { char *name; unsigned short id; unsigned char rev; unsigned char udma; } via_isa_bridges[] = { { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, VIA_UDMA_66 }, { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, VIA_UDMA_66 }, { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, VIA_UDMA_66 }, { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, VIA_UDMA_66 }, { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, VIA_UDMA_33 }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, VIA_UDMA_33 }, { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, VIA_UDMA_33 }, { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, VIA_UDMA_NONE }, { NULL } };
static struct via_isa_bridge *via_config; static unsigned char via_enabled; static unsigned int via_ata66;
/* * VIA /proc entry. */
#ifdef CONFIG_PROC_FS
#include <linux/stat.h> #include <linux/proc_fs.h>
int via_proc = 0; static struct pci_dev *bmide_dev, *isa_dev; extern int (*via_display_info)(char *, char **, off_t, int); /* ide-proc.c */
static char *via_fifo[] = { " 1 ", "3/4", "1/2", "1/4" }; 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], umul[4], uen[4], udma[4], active8b[4], recover8b[4]; struct pci_dev *dev = bmide_dev; unsigned int v, u, i, base; unsigned short c, w, size0, size1; unsigned char t; char *p = buffer;
via_print("----------VIA BusMastering IDE Configuration----------------");
via_print("Driver Version: 3.0");
pci_read_config_byte(isa_dev, PCI_REVISION_ID, &t); via_print("South Bridge: VIA %s rev %#x", via_config->name, t);
pci_read_config_byte(dev, PCI_REVISION_ID, &t); via_print("IDE type: Apollo VP rev %#x", t);
pci_read_config_word(dev, PCI_COMMAND, &c); via_print("Command register: %#x", c);
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &t); via_print("Latency timer: %d", t);
pci_clock = system_bus_clock(); via_print("PCI clock: %dMHz", pci_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("FIFO Output Data 1/2 Clock Advance: %s", (t & 16) ? "on" : "off" ); via_print("BM IDE Status Register Read Retry: %s", (t & 8) ? "on" : "off" );
pci_read_config_byte(dev, VIA_MISC_2, &t); sprintf(p, "Interrupt Steering Swap: %s", (t & 64) ? "on" : "off");
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) ? "on" : "off", (t & 0x40) ? "on" : "off" ); via_print("End Sect. FIFO flush: %10s%20s", (t & 0x20) ? "on" : "off", (t & 0x10) ? "on" : "off" );
pci_read_config_byte(dev, VIA_IDE_CONFIG, &t); via_print("Prefetch Buffer: %10s%20s", (t & 0x80) ? "on" : "off", (t & 0x20) ? "on" : "off" ); via_print("Post Write Buffer: %10s%20s", (t & 0x40) ? "on" : "off", (t & 0x10) ? "on" : "off" );
pci_read_config_byte(dev, VIA_FIFO_CONFIG, &t); via_print("FIFO Size: %10d%20d", 16 - (((t >> 5) & 1) + ((t >> 6) & 1)) * 8, (((t >> 5) & 1) + ((t >> 6) & 1)) * 8); via_print("FIFO Threshold: %10s%20s", via_fifo[(t >> 2) & 3], via_fifo[t & 3]);
pci_read_config_word(dev, VIA_PRI_SECTOR_SIZE, &size0); pci_read_config_word(dev, VIA_SEC_SECTOR_SIZE, &size1); via_print("Bytes Per Sector: %10d%20d", size0 & 0xfff, size1 & 0xfff);
pci_read_config_dword(dev, VIA_BM_BASE, &base); base = (base & 0xfff0) ;
c = inb((unsigned short)base + 0x02) | (inb((unsigned short)base + 0x0a) << 8);
via_print("Both channels togth: %10s%20s", (c & 0x80) ? "no" : "yes", (c & 0x8000) ? "no" : "yes" );
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); pci_read_config_dword(dev, VIA_UDMA_TIMING, &u);
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; umul[i] = ((u >> (((3 - i) & 2) << 3)) & 0x8) ? 2 : 1; uen[i] = ((u >> ((3 - i) << 3)) & 0x20) ? 1 : 0;
speed[i] = uen[i] ? 20 * pci_clock * umul[i] / udma[i] : 20 * pci_clock / (active[i] + recover[i]); cycle[i] = uen[i] ? 1000 / (pci_clock * umul[i]) * udma[i] : 1000 / pci_clock * (active[i] + recover[i]); }
via_print_drive("Transfer Mode: ", "%10s", uen[i] ? "UDMA" : (c & ((i & 1) ? 0x40 : 0x20) << ((i & 2) << 2) ? "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 #ifdef DEBUG #define via_write_config_byte(dev,number,value) do {\ printk(KERN_DEBUG "VP_IDE: Setting register %#x to %#x\n", number, value);\ pci_write_config_byte(dev,number,value); } while (0) #else #define via_write_config_byte pci_write_config_byte #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, 0, 3) << ((3 - dn) << 1)); via_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
via_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)), (FIT(timing->act8b - 1, 0, 0xf) << 4) | FIT(timing->rec8b - 1, 0, 0xf));
via_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn), (FIT(timing->active - 1, 0, 0xf) << 4) | FIT(timing->recover - 1, 0, 0xf));
if (timing->udma) { t = 0xe8; switch(via_config->udma) { case VIA_UDMA_33: t |= FIT(timing->udma - 2, 0, 3); break; case VIA_UDMA_66: t |= FIT(timing->udma - 2, 0, 7); break; } } else t = 0x0b;
via_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;
T = 1000 / system_bus_clock(); UT = T / via_config->udma;
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;
if (speed != XFER_PIO_SLOW && speed != drive->current_speed) { if ((err = ide_config_drive_speed(drive, speed))) return err; 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 ti 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 ata66 = eighty_ninty_three(drive); short ata100 = 0;
short speed = ide_find_best_mode(drive, XFER_PIO | XFER_EPIO | XFER_SWDMA | XFER_MWDMA | (via_config->udma > VIA_UDMA_NONE ? XFER_UDMA : 0) | (ata66 && via_config->udma > VIA_UDMA_66 ? XFER_UDMA_66 : 0) | (ata100 && via_config->udma > VIA_UDMA_100 ? XFER_UDMA_100 : 0));
via_set_drive(drive, speed);
func = ((speed & XFER_MODE) != XFER_PIO) ? ide_dma_on : ide_dma_off_quietly;
}
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 f, t, m; 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 UDMA66 mode set by BIOS & enable 66 MHz timing. */
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_ata66 |= (1 << (1 - (i >> 4)));
#ifdef DEBUG printk(KERN_DEBUG "VP_IDE: BIOS enabled ATA66: primary: %s, secondary: %s\n", via_ata66 & 1 ? "yes" : "no", via_ata66 & 2 ? "yes" : "no"); #endif
/* * Set up FIFO, flush, prefetch and post-writes. */
pci_read_config_dword(dev, VIA_IDE_ENABLE, &u); pci_read_config_byte(dev, VIA_FIFO_CONFIG, &f); pci_read_config_byte(dev, VIA_IDE_CONFIG, &t); pci_read_config_byte(dev, VIA_MISC_3, &m);
f &= 0x90; t &= 0x0f; m &= 0x0f;
switch (u & 3) { case 2: via_enabled = 1; f |= 0x06; t |= 0xc0; m |= 0xa0; break; /* primary only, 3/4 */ case 1: via_enabled = 2; f |= 0x69; t |= 0x30; m |= 0x50; break; /* secondary only, 3/4 */ case 3: via_enabled = 3; default: f |= 0x2a; t |= 0xf0; m |= 0xf0; break; /* fifo evenly distributed */ }
via_write_config_byte(dev, VIA_FIFO_CONFIG, f); via_write_config_byte(dev, VIA_IDE_CONFIG, t); via_write_config_byte(dev, VIA_MISC_3, m);
/* * 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->udma >= VIA_UDMA_66 ? "UDMA66" : via_config->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) { via_proc = 1; bmide_dev = dev; isa_dev = isa; via_display_info = &via_get_info; } #endif
return 0; }
/* * Since we don't have a way to detect the 80-wire ribbon cable * we rely on the BIOS detection. We also check the IDENTIFY byte * 93 to check the drive's point of view. I think we could return * '1' here */
unsigned int __init ata66_via82cxxx(ide_hwif_t *hwif) { return ((via_enabled && via_ata66) >> hwif->channel) & 1; }
void __init ide_init_via82cxxx(ide_hwif_t *hwif) { hwif->tuneproc = &via82cxxx_tune_drive; hwif->speedproc = &via_set_drive; hwif->drives[0].autotune = 1; hwif->drives[1].autotune = 1;
/* Fix for broken ide-probe.c */ hwif->drives[0].dn = hwif->channel * 2 + 0; hwif->drives[1].dn = hwif->channel * 2 + 1;
hwif->autodma = 0;
#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 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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