On Mon, Sep 16, 2002 at 10:40:34AM +0200, Michael wrote:
> HI,
>
> is there allready support for the southbridge via8235? in the via82cxxx.c
> file the chip is commented out with #ifdef FUTURE_BRIDGES ... #endif
> I am not able to turn on dma mode for my hard discs, since the kernel say
> unknown bridge.
> Is there a patch somewhere?
Here is a driver for 2.4.19.
-- Vojtech Pavlik SuSE Labs--pf9I7BMVVzbSWLtt Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="via82cxxx.c"
/* * Version 3.35 * * VIA IDE driver for Linux. Supported southbridges: * * vt82c576, vt82c586, vt82c586a, vt82c586b, vt82c596a, vt82c596b, * vt82c686, vt82c686a, vt82c686b, vt8231, vt8233, vt8233c, vt8233a, * vt8235 * * Copyright (c) 2000-2002 Vojtech Pavlik * * Based on the work of: * Michel Aubry * Jeff Garzik * Andre Hedrick */
/* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */
#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 0x007 #define VIA_UDMA_NONE 0x000 #define VIA_UDMA_33 0x001 #define VIA_UDMA_66 0x002 #define VIA_UDMA_100 0x003 #define VIA_UDMA_133 0x004 #define VIA_BAD_PREQ 0x010 /* Crashes if PREQ# till DDACK# set */ #define VIA_BAD_CLK66 0x020 /* 66 MHz clock doesn't work correctly */ #define VIA_SET_FIFO 0x040 /* Needs to have FIFO split set */ #define VIA_NO_UNMASK 0x080 /* Doesn't work with IRQ unmasking on */ #define VIA_BAD_ID 0x100 /* Has wrong vendor ID (0x1107) */
#ifndef PCI_DEVICE_ID_VIA_8235 #define PCI_DEVICE_ID_VIA_8235 0x3177 #endif
/* * VIA SouthBridge chips. */
static struct via_isa_bridge { char *name; unsigned short id; unsigned char rev_min; unsigned char rev_max; unsigned short flags; } via_isa_bridges[] = { #ifdef FUTURE_BRIDGES { "vt8237", PCI_DEVICE_ID_VIA_8237, 0x00, 0x2f, VIA_UDMA_133 }, #endif { "vt8235", PCI_DEVICE_ID_VIA_8235, 0x00, 0x2f, VIA_UDMA_133 }, { "vt8233a", PCI_DEVICE_ID_VIA_8233A, 0x00, 0x2f, VIA_UDMA_133 }, { "vt8233c", PCI_DEVICE_ID_VIA_8233C_0, 0x00, 0x2f, VIA_UDMA_100 }, { "vt8233", PCI_DEVICE_ID_VIA_8233_0, 0x00, 0x2f, VIA_UDMA_100 }, { "vt8231", PCI_DEVICE_ID_VIA_8231, 0x00, 0x2f, VIA_UDMA_100 }, { "vt82c686b", PCI_DEVICE_ID_VIA_82C686, 0x40, 0x4f, VIA_UDMA_100 }, { "vt82c686a", PCI_DEVICE_ID_VIA_82C686, 0x10, 0x2f, VIA_UDMA_66 }, { "vt82c686", PCI_DEVICE_ID_VIA_82C686, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 }, { "vt82c596b", PCI_DEVICE_ID_VIA_82C596, 0x10, 0x2f, VIA_UDMA_66 }, { "vt82c596a", PCI_DEVICE_ID_VIA_82C596, 0x00, 0x0f, VIA_UDMA_33 | VIA_BAD_CLK66 }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x47, 0x4f, VIA_UDMA_33 | VIA_SET_FIFO }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x40, 0x46, VIA_UDMA_33 | VIA_SET_FIFO | VIA_BAD_PREQ }, { "vt82c586b", PCI_DEVICE_ID_VIA_82C586_0, 0x30, 0x3f, VIA_UDMA_33 | VIA_SET_FIFO }, { "vt82c586a", PCI_DEVICE_ID_VIA_82C586_0, 0x20, 0x2f, VIA_UDMA_33 | VIA_SET_FIFO }, { "vt82c586", PCI_DEVICE_ID_VIA_82C586_0, 0x00, 0x0f, VIA_UDMA_NONE | VIA_SET_FIFO }, { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK }, { "vt82c576", PCI_DEVICE_ID_VIA_82C576, 0x00, 0x2f, VIA_UDMA_NONE | VIA_SET_FIFO | VIA_NO_UNMASK | VIA_BAD_ID }, { NULL } };
static struct via_isa_bridge *via_config; static unsigned char via_enabled; static unsigned int via_80w; static unsigned int via_clock; static char *via_dma[] = { "MWDMA16", "UDMA33", "UDMA66", "UDMA100", "UDMA133" };
/* * 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) { int speed[4], cycle[4], setup[4], active[4], recover[4], den[4], uen[4], udma[4], umul[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: 3.35"); 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("Highest DMA rate: %s", via_dma[via_config->flags & VIA_UDMA]);
via_print("BM-DMA base: %#x", via_base); via_print("PCI clock: %d.%dMHz", via_clock / 1000, via_clock / 100 % 10);
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; umul[i] = ((u >> (((3 - i) & 2) << 3)) & 0x8) ? 1 : 2; uen[i] = ((u >> ((3 - i) << 3)) & 0x20); den[i] = (c & ((i & 1) ? 0x40 : 0x20) << ((i & 2) << 2));
speed[i] = 2 * via_clock / (active[i] + recover[i]); cycle[i] = 1000000 * (active[i] + recover[i]) / via_clock;
if (!uen[i] || !den[i]) continue;
switch (via_config->flags & VIA_UDMA) {
case VIA_UDMA_33: speed[i] = 2 * via_clock / udma[i]; cycle[i] = 1000000 * udma[i] / via_clock; break;
case VIA_UDMA_66: speed[i] = 4 * via_clock / (udma[i] * umul[i]); cycle[i] = 500000 * (udma[i] * umul[i]) / via_clock; break;
case VIA_UDMA_100: speed[i] = 6 * via_clock / udma[i]; cycle[i] = 333333 * udma[i] / via_clock; break;
case VIA_UDMA_133: speed[i] = 8 * via_clock / udma[i]; cycle[i] = 250000 * udma[i] / via_clock; break; } }
via_print_drive("Transfer Mode: ", "%10s", den[i] ? (uen[i] ? "UDMA" : "DMA") : "PIO");
via_print_drive("Address Setup: ", "%8dns", 1000000 * setup[i] / via_clock); via_print_drive("Cmd Active: ", "%8dns", 1000000 * active8b[i] / via_clock); via_print_drive("Cmd Recovery: ", "%8dns", 1000000 * recover8b[i] / via_clock); via_print_drive("Data Active: ", "%8dns", 1000000 * active[i] / via_clock); via_print_drive("Data Recovery: ", "%8dns", 1000000 * recover[i] / via_clock); via_print_drive("Cycle Time: ", "%8dns", cycle[i]); via_print_drive("Transfer Rate: ", "%4d.%dMB/s", speed[i] / 1000, speed[i] / 100 % 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);
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 ? (0xe0 | (FIT(timing->udma, 2, 9) - 2)) : 0x07; break; case VIA_UDMA_133: t = timing->udma ? (0xe0 | (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; unsigned int T, UT;
if (speed != XFER_PIO_SLOW && speed != drive->current_speed) if (ide_config_drive_speed(drive, speed)) printk(KERN_WARNING "ide%d: Drive %d didn't accept speed setting. Oh, well.\n", drive->dn >> 1, drive->dn & 1);
T = 1000000000 / via_clock;
switch (via_config->flags & VIA_UDMA) { case VIA_UDMA_33: UT = T; break; case VIA_UDMA_66: UT = T/2; break; case VIA_UDMA_100: UT = T/3; break; case VIA_UDMA_133: UT = T/4; break; default: UT = T; }
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 = HWIF(drive)->udma_four;
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) | (w80 && (via_config->flags & VIA_UDMA) >= VIA_UDMA_133 ? XFER_UDMA_133 : 0));
via_set_drive(drive, speed);
func = (HWIF(drive)->autodma && (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 t, v; unsigned int u; int i;
/* * Find the 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->flags & VIA_BAD_ID), via_config->id, NULL))) {
pci_read_config_byte(isa, PCI_REVISION_ID, &t); if (t >= via_config->rev_min && t <= via_config->rev_max) break; }
if (!via_config->id) { printk(KERN_WARNING "VP_IDE: Unknown VIA SouthBridge, contact Vojtech Pavlik <vojtech@ucw.cz>\n"); return -ENODEV; }
/* * Check 80-wire cable presence and setup Clk66. */
switch (via_config->flags & VIA_UDMA) {
case VIA_UDMA_66: pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); /* Enable Clk66 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u | 0x80008); for (i = 24; i >= 0; i -= 8) if (((u >> (i & 16)) & 8) && ((u >> i) & 0x20) && (((u >> i) & 7) < 2)) via_80w |= (1 << (1 - (i >> 4))); /* 2x PCI clock and UDMA w/ < 3T/cycle */ break;
case VIA_UDMA_100: pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 4))) via_80w |= (1 << (1 - (i >> 4))); /* BIOS 80-wire bit or UDMA w/ < 60ns/cycle */ break;
case VIA_UDMA_133: pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); for (i = 24; i >= 0; i -= 8) if (((u >> i) & 0x10) || (((u >> i) & 0x20) && (((u >> i) & 7) < 8))) via_80w |= (1 << (1 - (i >> 4))); /* BIOS 80-wire bit or UDMA w/ < 60ns/cycle */ break;
}
if (via_config->flags & VIA_BAD_CLK66) { /* Disable Clk66 */ pci_read_config_dword(dev, VIA_UDMA_TIMING, &u); /* Would cause trouble on 596a and 686 */ pci_write_config_dword(dev, VIA_UDMA_TIMING, u & ~0x80008); }
/* * Check whether interfaces are enabled. */
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_BAD_PREQ) /* Disable PREQ# till DDACK# */ t &= 0x7f; /* Would crash on 586b rev 41 */
if (via_config->flags & VIA_SET_FIFO) { /* Fix FIFO split between channels */ t &= (t & 0x9f); switch (via_enabled) { case 1: t |= 0x00; break; /* 16 on primary */ case 2: t |= 0x60; break; /* 16 on secondary */ case 3: t |= 0x20; break; /* 8 pri 8 sec */ } }
pci_write_config_byte(dev, VIA_FIFO_CONFIG, t);
/* * Determine system bus clock. */
via_clock = system_bus_clock() * 1000;
switch (via_clock) { case 33000: via_clock = 33333; break; case 37000: via_clock = 37500; break; case 41000: via_clock = 41666; break; }
if (via_clock < 20000 || via_clock > 50000) { printk(KERN_WARNING "VP_IDE: User given PCI clock speed impossible (%d), using 33 MHz instead.\n", via_clock); printk(KERN_WARNING "VP_IDE: Use ide0=ata66 if you want to assume 80-wire cable.\n"); via_clock = 33333; }
/* * Print the boot message. */
pci_read_config_byte(isa, PCI_REVISION_ID, &t); printk(KERN_INFO "VP_IDE: VIA %s (rev %02x) IDE %s controller on pci%s\n", via_config->name, t, via_dma[via_config->flags & VIA_UDMA], dev->slot_name);
/* * Setup /proc/ide/via entry. */
#ifdef CONFIG_PROC_FS if (!via_proc) { via_base = pci_resource_start(dev, 4); 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 = (via_config->flags & VIA_NO_UNMASK) ? 0 : 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; #ifdef CONFIG_IDEDMA_AUTO if (!noautodma) hwif->autodma = 1; #endif } #endif /* CONFIG_BLK_DEV_IDEDMA */ }
/* * We allow the BM-DMA driver to 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); }
--pf9I7BMVVzbSWLtt 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 1.6 2001/12/23 22:47:56 vojtech Exp $ * * Copyright (c) 1999-2001 Vojtech Pavlik */
/* * 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@ucw.cz>, or by paper mail: * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic */
#include <linux/hdreg.h>
#define XFER_PIO_5 0x0d #define XFER_UDMA_SLOW 0x4f
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 0-6 timings (in nanoseconds). * These were taken from ATA/ATAPI-6 standard, rev 0a, except * for PIO 5, which is a nonstandard extension and UDMA6, which * is currently supported only by Maxtor drives. */
static struct ide_timing ide_timing[] = {
{ XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 15 }, { 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_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 150 }, { 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_133 0x48 #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_133) == XFER_UDMA_133) if ((best = (id->dma_ultra & 0x0040) ? XFER_UDMA_6 : 0)) return best;
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 * 1000, T); q->act8b = EZ(t->act8b * 1000, T); q->rec8b = EZ(t->rec8b * 1000, T); q->cyc8b = EZ(t->cyc8b * 1000, T); q->active = EZ(t->active * 1000, T); q->recover = EZ(t->recover * 1000, T); q->cycle = EZ(t->cycle * 1000, T); q->udma = EZ(t->udma * 1000, 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
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