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 <[EMAIL PROTECTED]>, 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 <[EMAIL PROTECTED]>, 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 <[EMAIL PROTECTED]>\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);
}
