patch-2.4.21 linux-2.4.21/drivers/ide/pci/pdc202xx_old.c

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diff -urN linux-2.4.20/drivers/ide/pci/pdc202xx_old.c linux-2.4.21/drivers/ide/pci/pdc202xx_old.c
@@ -0,0 +1,963 @@
+/*
+ *  linux/drivers/ide/pci/pdc202xx_old.c	Version 0.36	Sept 11, 2002
+ *
+ *  Copyright (C) 1998-2002		Andre Hedrick <andre@linux-ide.org>
+ *
+ *  Promise Ultra33 cards with BIOS v1.20 through 1.28 will need this
+ *  compiled into the kernel if you have more than one card installed.
+ *  Note that BIOS v1.29 is reported to fix the problem.  Since this is
+ *  safe chipset tuning, including this support is harmless
+ *
+ *  Promise Ultra66 cards with BIOS v1.11 this
+ *  compiled into the kernel if you have more than one card installed.
+ *
+ *  Promise Ultra100 cards.
+ *
+ *  The latest chipset code will support the following ::
+ *  Three Ultra33 controllers and 12 drives.
+ *  8 are UDMA supported and 4 are limited to DMA mode 2 multi-word.
+ *  The 8/4 ratio is a BIOS code limit by promise.
+ *
+ *  UNLESS you enable "CONFIG_PDC202XX_BURST"
+ *
+ */
+
+/*
+ *  Portions Copyright (C) 1999 Promise Technology, Inc.
+ *  Author: Frank Tiernan (frankt@promise.com)
+ *  Released under terms of General Public License
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+#include <linux/hdreg.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include "ide_modes.h"
+#include "pdc202xx_old.h"
+
+#define PDC202_DEBUG_CABLE	0
+
+#if defined(DISPLAY_PDC202XX_TIMINGS) && defined(CONFIG_PROC_FS)
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+
+static u8 pdc202xx_proc = 0;
+#define PDC202_MAX_DEVS		5
+static struct pci_dev *pdc202_devs[PDC202_MAX_DEVS];
+static int n_pdc202_devs;
+
+static char * pdc202xx_info (char *buf, struct pci_dev *dev)
+{
+	char *p = buf;
+
+	unsigned long bibma  = pci_resource_start(dev, 4);
+	u32 reg60h = 0, reg64h = 0, reg68h = 0, reg6ch = 0;
+	u16 reg50h = 0, pmask = (1<<10), smask = (1<<11);
+	u8 hi = 0, lo = 0;
+
+        /*
+         * at that point bibma+0x2 et bibma+0xa are byte registers
+         * to investigate:
+         */
+	u8 c0	= inb_p((u16)bibma + 0x02);
+	u8 c1	= inb_p((u16)bibma + 0x0a);
+
+	u8 sc11	= inb_p((u16)bibma + 0x11);
+	u8 sc1a	= inb_p((u16)bibma + 0x1a);
+	u8 sc1b	= inb_p((u16)bibma + 0x1b);
+	u8 sc1c	= inb_p((u16)bibma + 0x1c); 
+	u8 sc1d	= inb_p((u16)bibma + 0x1d);
+	u8 sc1e	= inb_p((u16)bibma + 0x1e);
+	u8 sc1f	= inb_p((u16)bibma + 0x1f);
+
+	pci_read_config_word(dev, 0x50, &reg50h);
+	pci_read_config_dword(dev, 0x60, &reg60h);
+	pci_read_config_dword(dev, 0x64, &reg64h);
+	pci_read_config_dword(dev, 0x68, &reg68h);
+	pci_read_config_dword(dev, 0x6c, &reg6ch);
+
+	p += sprintf(p, "\n                                ");
+	switch(dev->device) {
+		case PCI_DEVICE_ID_PROMISE_20267:
+			p += sprintf(p, "Ultra100"); break;
+		case PCI_DEVICE_ID_PROMISE_20265:
+			p += sprintf(p, "Ultra100 on M/B"); break;
+		case PCI_DEVICE_ID_PROMISE_20263:
+			p += sprintf(p, "FastTrak 66"); break;
+		case PCI_DEVICE_ID_PROMISE_20262:
+			p += sprintf(p, "Ultra66"); break;
+		case PCI_DEVICE_ID_PROMISE_20246:
+			p += sprintf(p, "Ultra33");
+			reg50h |= 0x0c00;
+			break;
+		default:
+			p += sprintf(p, "Ultra Series"); break;
+	}
+	p += sprintf(p, " Chipset.\n");
+
+	p += sprintf(p, "------------------------------- General Status "
+			"---------------------------------\n");
+	p += sprintf(p, "Burst Mode                           : %sabled\n",
+		(sc1f & 0x01) ? "en" : "dis");
+	p += sprintf(p, "Host Mode                            : %s\n",
+		(sc1f & 0x08) ? "Tri-Stated" : "Normal");
+	p += sprintf(p, "Bus Clocking                         : %s\n",
+		((sc1f & 0xC0) == 0xC0) ? "100 External" :
+		((sc1f & 0x80) == 0x80) ? "66 External" :
+		((sc1f & 0x40) == 0x40) ? "33 External" : "33 PCI Internal");
+	p += sprintf(p, "IO pad select                        : %s mA\n",
+		((sc1c & 0x03) == 0x03) ? "10" :
+		((sc1c & 0x02) == 0x02) ? "8" :
+		((sc1c & 0x01) == 0x01) ? "6" :
+		((sc1c & 0x00) == 0x00) ? "4" : "??");
+	SPLIT_BYTE(sc1e, hi, lo);
+	p += sprintf(p, "Status Polling Period                : %d\n", hi);
+	p += sprintf(p, "Interrupt Check Status Polling Delay : %d\n", lo);
+	p += sprintf(p, "--------------- Primary Channel "
+			"---------------- Secondary Channel "
+			"-------------\n");
+	p += sprintf(p, "                %s                         %s\n",
+		(c0&0x80)?"disabled":"enabled ",
+		(c1&0x80)?"disabled":"enabled ");
+	p += sprintf(p, "66 Clocking     %s                         %s\n",
+		(sc11&0x02)?"enabled ":"disabled",
+		(sc11&0x08)?"enabled ":"disabled");
+	p += sprintf(p, "           Mode %s                      Mode %s\n",
+		(sc1a & 0x01) ? "MASTER" : "PCI   ",
+		(sc1b & 0x01) ? "MASTER" : "PCI   ");
+	p += sprintf(p, "                %s                     %s\n",
+		(sc1d & 0x08) ? "Error       " :
+		((sc1d & 0x05) == 0x05) ? "Not My INTR " :
+		(sc1d & 0x04) ? "Interrupting" :
+		(sc1d & 0x02) ? "FIFO Full   " :
+		(sc1d & 0x01) ? "FIFO Empty  " : "????????????",
+		(sc1d & 0x80) ? "Error       " :
+		((sc1d & 0x50) == 0x50) ? "Not My INTR " :
+		(sc1d & 0x40) ? "Interrupting" :
+		(sc1d & 0x20) ? "FIFO Full   " :
+		(sc1d & 0x10) ? "FIFO Empty  " : "????????????");
+	p += sprintf(p, "--------------- drive0 --------- drive1 "
+			"-------- drive0 ---------- drive1 ------\n");
+	p += sprintf(p, "DMA enabled:    %s              %s "
+			"            %s               %s\n",
+		(c0&0x20)?"yes":"no ", (c0&0x40)?"yes":"no ",
+		(c1&0x20)?"yes":"no ", (c1&0x40)?"yes":"no ");
+	p += sprintf(p, "DMA Mode:       %s           %s "
+			"         %s            %s\n",
+		pdc202xx_ultra_verbose(reg60h, (reg50h & pmask)),
+		pdc202xx_ultra_verbose(reg64h, (reg50h & pmask)),
+		pdc202xx_ultra_verbose(reg68h, (reg50h & smask)),
+		pdc202xx_ultra_verbose(reg6ch, (reg50h & smask)));
+	p += sprintf(p, "PIO Mode:       %s            %s "
+			"          %s            %s\n",
+		pdc202xx_pio_verbose(reg60h),
+		pdc202xx_pio_verbose(reg64h),
+		pdc202xx_pio_verbose(reg68h),
+		pdc202xx_pio_verbose(reg6ch));
+#if 0
+	p += sprintf(p, "--------------- Can ATAPI DMA ---------------\n");
+#endif
+	return (char *)p;
+}
+
+static int pdc202xx_get_info (char *buffer, char **addr, off_t offset, int count)
+{
+	char *p = buffer;
+	int i, len;
+
+	for (i = 0; i < n_pdc202_devs; i++) {
+		struct pci_dev *dev	= pdc202_devs[i];
+		p = pdc202xx_info(buffer, dev);
+	}
+	/* p - buffer must be less than 4k! */
+	len = (p - buffer) - offset;
+	*addr = buffer + offset;
+	
+	return len > count ? count : len;
+}
+#endif  /* defined(DISPLAY_PDC202XX_TIMINGS) && defined(CONFIG_PROC_FS) */
+
+
+static u8 pdc202xx_ratemask (ide_drive_t *drive)
+{
+	u8 mode;
+
+	switch(HWIF(drive)->pci_dev->device) {
+		case PCI_DEVICE_ID_PROMISE_20267:
+		case PCI_DEVICE_ID_PROMISE_20265:
+			mode = 3;
+			break;
+		case PCI_DEVICE_ID_PROMISE_20263:
+		case PCI_DEVICE_ID_PROMISE_20262:
+			mode = 2;
+			break;
+		case PCI_DEVICE_ID_PROMISE_20246:
+			return 1;
+		default:
+			return 0;
+	}
+	if (!eighty_ninty_three(drive))
+		mode = min(mode, (u8)1);
+	return mode;
+}
+
+static int check_in_drive_lists (ide_drive_t *drive, const char **list)
+{
+	struct hd_driveid *id = drive->id;
+
+	if (pdc_quirk_drives == list) {
+		while (*list) {
+			if (strstr(id->model, *list++)) {
+				return 2;
+			}
+		}
+	} else {
+		while (*list) {
+			if (!strcmp(*list++,id->model)) {
+				return 1;
+			}
+		}
+	}
+	return 0;
+}
+
+static int pdc202xx_tune_chipset (ide_drive_t *drive, u8 xferspeed)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct pci_dev *dev	= hwif->pci_dev;
+	u8 drive_pci		= 0x60 + (drive->dn << 2);
+	u8 speed	= ide_rate_filter(pdc202xx_ratemask(drive), xferspeed);
+
+	u32			drive_conf;
+	u8			AP, BP, CP, DP;
+	u8			TA = 0, TB = 0, TC = 0;
+
+	if ((drive->media != ide_disk) && (speed < XFER_SW_DMA_0))
+		return -1;
+
+	pci_read_config_dword(dev, drive_pci, &drive_conf);
+	pci_read_config_byte(dev, (drive_pci), &AP);
+	pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+	pci_read_config_byte(dev, (drive_pci)|0x02, &CP);
+	pci_read_config_byte(dev, (drive_pci)|0x03, &DP);
+
+	if (speed < XFER_SW_DMA_0) {
+		if ((AP & 0x0F) || (BP & 0x07)) {
+			/* clear PIO modes of lower 8421 bits of A Register */
+			pci_write_config_byte(dev, (drive_pci), AP &~0x0F);
+			pci_read_config_byte(dev, (drive_pci), &AP);
+
+			/* clear PIO modes of lower 421 bits of B Register */
+			pci_write_config_byte(dev, (drive_pci)|0x01, BP &~0x07);
+			pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+
+			pci_read_config_byte(dev, (drive_pci), &AP);
+			pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+		}
+	} else {
+		if ((BP & 0xF0) && (CP & 0x0F)) {
+			/* clear DMA modes of upper 842 bits of B Register */
+			/* clear PIO forced mode upper 1 bit of B Register */
+			pci_write_config_byte(dev, (drive_pci)|0x01, BP &~0xF0);
+			pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+
+			/* clear DMA modes of lower 8421 bits of C Register */
+			pci_write_config_byte(dev, (drive_pci)|0x02, CP &~0x0F);
+			pci_read_config_byte(dev, (drive_pci)|0x02, &CP);
+		}
+	}
+
+	pci_read_config_byte(dev, (drive_pci), &AP);
+	pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+	pci_read_config_byte(dev, (drive_pci)|0x02, &CP);
+
+	switch(speed) {
+		case XFER_UDMA_6:	speed = XFER_UDMA_5;
+		case XFER_UDMA_5:
+		case XFER_UDMA_4:	TB = 0x20; TC = 0x01; break;
+		case XFER_UDMA_2:	TB = 0x20; TC = 0x01; break;
+		case XFER_UDMA_3:
+		case XFER_UDMA_1:	TB = 0x40; TC = 0x02; break;
+		case XFER_UDMA_0:
+		case XFER_MW_DMA_2:	TB = 0x60; TC = 0x03; break;
+		case XFER_MW_DMA_1:	TB = 0x60; TC = 0x04; break;
+		case XFER_MW_DMA_0:
+		case XFER_SW_DMA_2:	TB = 0x60; TC = 0x05; break;
+		case XFER_SW_DMA_1:	TB = 0x80; TC = 0x06; break;
+		case XFER_SW_DMA_0:	TB = 0xC0; TC = 0x0B; break;
+		case XFER_PIO_4:	TA = 0x01; TB = 0x04; break;
+		case XFER_PIO_3:	TA = 0x02; TB = 0x06; break;
+		case XFER_PIO_2:	TA = 0x03; TB = 0x08; break;
+		case XFER_PIO_1:	TA = 0x05; TB = 0x0C; break;
+		case XFER_PIO_0:
+		default:		TA = 0x09; TB = 0x13; break;
+	}
+
+	if (speed < XFER_SW_DMA_0) {
+		pci_write_config_byte(dev, (drive_pci), AP|TA);
+		pci_write_config_byte(dev, (drive_pci)|0x01, BP|TB);
+	} else {
+		pci_write_config_byte(dev, (drive_pci)|0x01, BP|TB);
+		pci_write_config_byte(dev, (drive_pci)|0x02, CP|TC);
+	}
+
+#if PDC202XX_DECODE_REGISTER_INFO
+	pci_read_config_byte(dev, (drive_pci), &AP);
+	pci_read_config_byte(dev, (drive_pci)|0x01, &BP);
+	pci_read_config_byte(dev, (drive_pci)|0x02, &CP);
+	pci_read_config_byte(dev, (drive_pci)|0x03, &DP);
+
+	decode_registers(REG_A, AP);
+	decode_registers(REG_B, BP);
+	decode_registers(REG_C, CP);
+	decode_registers(REG_D, DP);
+#endif /* PDC202XX_DECODE_REGISTER_INFO */
+#if PDC202XX_DEBUG_DRIVE_INFO
+	printk(KERN_DEBUG "%s: %s drive%d 0x%08x ",
+		drive->name, ide_xfer_verbose(speed),
+		drive->dn, drive_conf);
+		pci_read_config_dword(dev, drive_pci, &drive_conf);
+	printk("0x%08x\n", drive_conf);
+#endif /* PDC202XX_DEBUG_DRIVE_INFO */
+
+	return (ide_config_drive_speed(drive, speed));
+}
+
+
+/*   0    1    2    3    4    5    6   7   8
+ * 960, 480, 390, 300, 240, 180, 120, 90, 60
+ *           180, 150, 120,  90,  60
+ * DMA_Speed
+ * 180, 120,  90,  90,  90,  60,  30
+ *  11,   5,   4,   3,   2,   1,   0
+ */
+static void config_chipset_for_pio (ide_drive_t *drive, u8 pio)
+{
+	u8 speed = 0;
+
+	if (pio == 5) pio = 4;
+	speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, pio, NULL);
+        
+	pdc202xx_tune_chipset(drive, speed);
+}
+
+static u8 pdc202xx_old_cable_detect (ide_hwif_t *hwif)
+{
+	u16 CIS = 0, mask = (hwif->channel) ? (1<<11) : (1<<10);
+	pci_read_config_word(hwif->pci_dev, 0x50, &CIS);
+	return ((u8)(CIS & mask));
+}
+
+static int config_chipset_for_dma (ide_drive_t *drive)
+{
+	struct hd_driveid *id	= drive->id;
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct pci_dev *dev	= hwif->pci_dev;
+	u32 drive_conf		= 0;
+	u8 mask			= hwif->channel ? 0x08 : 0x02;
+	u8 drive_pci		= 0x60 + (drive->dn << 2);
+	u8 test1 = 0, test2 = 0, speed = -1;
+	u8 AP = 0, CLKSPD = 0, cable = 0;
+
+	u8 ultra_66		= ((id->dma_ultra & 0x0010) ||
+				   (id->dma_ultra & 0x0008)) ? 1 : 0;
+
+	switch(dev->device) {
+		case PCI_DEVICE_ID_PROMISE_20267:
+		case PCI_DEVICE_ID_PROMISE_20265:
+		case PCI_DEVICE_ID_PROMISE_20263:
+		case PCI_DEVICE_ID_PROMISE_20262:
+			cable = pdc202xx_old_cable_detect(hwif);
+#if PDC202_DEBUG_CABLE
+			printk(KERN_DEBUG "%s: %s-pin cable, %s-pin cable, %d\n",
+				hwif->name, hwif->udma_four ? "80" : "40",
+				cable ? "40" : "80", cable);
+#endif /* PDC202_DEBUG_CABLE */
+			break;
+		case PCI_DEVICE_ID_PROMISE_20246:
+			ultra_66 = 0;
+			break;
+		default:
+			BUG();
+	}
+
+	CLKSPD = hwif->INB(hwif->dma_master + 0x11);
+
+	/*
+	 * Set the control register to use the 66Mhz system
+	 * clock for UDMA 3/4 mode operation. If one drive on
+	 * a channel is U66 capable but the other isn't we
+	 * fall back to U33 mode. The BIOS INT 13 hooks turn
+	 * the clock on then off for each read/write issued. I don't
+	 * do that here because it would require modifying the
+	 * kernel, separating the fop routines from the kernel or
+	 * somehow hooking the fops calls. It may also be possible to
+	 * leave the 66Mhz clock on and readjust the timing
+	 * parameters.
+	 */
+
+	if ((ultra_66) && (cable)) {
+#ifdef DEBUG
+		printk(KERN_DEBUG "ULTRA 66/100/133: %s channel of Ultra 66/100/133 "
+			"requires an 80-pin cable for Ultra66 operation.\n",
+			hwif->channel ? "Secondary" : "Primary");
+		printk(KERN_DEBUG "         Switching to Ultra33 mode.\n");
+#endif /* DEBUG */
+		/* Primary   : zero out second bit */
+		/* Secondary : zero out fourth bit */
+		hwif->OUTB(CLKSPD & ~mask, (hwif->dma_master + 0x11));
+		printk(KERN_WARNING "Warning: %s channel requires an 80-pin cable for operation.\n", hwif->channel ? "Secondary":"Primary");
+		printk(KERN_WARNING "%s reduced to Ultra33 mode.\n", drive->name);
+	} else {
+		if (ultra_66) {
+			/*
+			 * check to make sure drive on same channel
+			 * is u66 capable
+			 */
+			if (hwif->drives[!(drive->dn%2)].id) {
+				if (hwif->drives[!(drive->dn%2)].id->dma_ultra & 0x0078) {
+					hwif->OUTB(CLKSPD | mask, (hwif->dma_master + 0x11));
+				} else {
+					hwif->OUTB(CLKSPD & ~mask, (hwif->dma_master + 0x11));
+				}
+			} else { /* udma4 drive by itself */
+				hwif->OUTB(CLKSPD | mask, (hwif->dma_master + 0x11));
+			}
+		}
+	}
+
+	drive_pci = 0x60 + (drive->dn << 2);
+	pci_read_config_dword(dev, drive_pci, &drive_conf);
+	if ((drive_conf != 0x004ff304) && (drive_conf != 0x004ff3c4))
+		goto chipset_is_set;
+
+	pci_read_config_byte(dev, drive_pci, &test1);
+	if (!(test1 & SYNC_ERRDY_EN)) {
+		if (drive->select.b.unit & 0x01) {
+			pci_read_config_byte(dev, drive_pci - 4, &test2);
+			if ((test2 & SYNC_ERRDY_EN) &&
+			    !(test1 & SYNC_ERRDY_EN)) {
+				pci_write_config_byte(dev, drive_pci,
+					test1|SYNC_ERRDY_EN);
+			}
+		} else {
+			pci_write_config_byte(dev, drive_pci,
+				test1|SYNC_ERRDY_EN);
+		}
+	}
+
+chipset_is_set:
+
+	if (drive->media == ide_disk) {
+		pci_read_config_byte(dev, (drive_pci), &AP);
+		if (id->capability & 4)	/* IORDY_EN */
+			pci_write_config_byte(dev, (drive_pci), AP|IORDY_EN);
+		pci_read_config_byte(dev, (drive_pci), &AP);
+		if (drive->media == ide_disk)	/* PREFETCH_EN */
+			pci_write_config_byte(dev, (drive_pci), AP|PREFETCH_EN);
+	}
+
+	speed = ide_dma_speed(drive, pdc202xx_ratemask(drive));
+
+	if (!(speed)) {
+		/* restore original pci-config space */
+		pci_write_config_dword(dev, drive_pci, drive_conf);
+		hwif->tuneproc(drive, 5);
+		return 0;
+	}
+
+	(void) hwif->speedproc(drive, speed);
+	return ide_dma_enable(drive);
+}
+
+static int pdc202xx_config_drive_xfer_rate (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	struct hd_driveid *id	= drive->id;
+
+	drive->init_speed = 0;
+
+	if ((id->capability & 1) && drive->autodma) {
+		/* Consult the list of known "bad" drives */
+		if (hwif->ide_dma_bad_drive(drive))
+			goto fast_ata_pio;
+		if (id->field_valid & 4) {
+			if (id->dma_ultra & hwif->ultra_mask) {
+				/* Force if Capable UltraDMA */
+				int dma = config_chipset_for_dma(drive);
+				if ((id->field_valid & 2) && !dma)
+					goto try_dma_modes;
+			}
+		} else if (id->field_valid & 2) {
+try_dma_modes:
+			if ((id->dma_mword & hwif->mwdma_mask) ||
+			    (id->dma_1word & hwif->swdma_mask)) {
+				/* Force if Capable regular DMA modes */
+				if (!config_chipset_for_dma(drive))
+					goto no_dma_set;
+			}
+		} else if (hwif->ide_dma_good_drive(drive) &&
+			    (id->eide_dma_time < 150)) {
+				goto no_dma_set;
+			/* Consult the list of known "good" drives */
+			if (!config_chipset_for_dma(drive))
+				goto no_dma_set;
+		} else {
+			goto fast_ata_pio;
+		}
+	} else if ((id->capability & 8) || (id->field_valid & 2)) {
+fast_ata_pio:
+no_dma_set:
+		hwif->tuneproc(drive, 5);
+		return hwif->ide_dma_off_quietly(drive);
+	}
+	return hwif->ide_dma_on(drive);
+}
+
+static int pdc202xx_quirkproc (ide_drive_t *drive)
+{
+	return ((int) check_in_drive_lists(drive, pdc_quirk_drives));
+}
+
+static int pdc202xx_old_ide_dma_begin(ide_drive_t *drive)
+{
+	if (drive->addressing == 1) {
+		struct request *rq	= HWGROUP(drive)->rq;
+		ide_hwif_t *hwif	= HWIF(drive);
+//		struct pci_dev *dev	= hwif->pci_dev;
+//		unsgned long high_16	= pci_resource_start(dev, 4);
+		unsigned long high_16   = hwif->dma_master;
+		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
+		u32 word_count	= 0;
+		u8 clock = hwif->INB(high_16 + 0x11);
+
+		hwif->OUTB(clock|(hwif->channel ? 0x08 : 0x02), high_16+0x11);
+		word_count = (rq->nr_sectors << 8);
+		word_count = (rq_data_dir(rq) == READ) ?
+					word_count | 0x05000000 :
+					word_count | 0x06000000;
+		hwif->OUTL(word_count, atapi_reg);
+	}
+	return __ide_dma_begin(drive);
+}
+
+static int pdc202xx_old_ide_dma_end(ide_drive_t *drive)
+{
+	if (drive->addressing == 1) {
+		ide_hwif_t *hwif	= HWIF(drive);
+//		unsigned long high_16	= pci_resource_start(hwif->pci_dev, 4);
+		unsigned long high_16	= hwif->dma_master;
+		unsigned long atapi_reg	= high_16 + (hwif->channel ? 0x24 : 0x20);
+		u8 clock		= 0;
+
+		hwif->OUTL(0, atapi_reg); /* zero out extra */
+		clock = hwif->INB(high_16 + 0x11);
+		hwif->OUTB(clock & ~(hwif->channel ? 0x08:0x02), high_16+0x11);
+	}
+	return __ide_dma_end(drive);
+}
+
+static int pdc202xx_old_ide_dma_test_irq(ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+//	struct pci_dev *dev	= hwif->pci_dev;
+//	unsigned long high_16	= pci_resource_start(dev, 4);
+	unsigned long high_16	= hwif->dma_master;
+	u8 dma_stat		= hwif->INB(hwif->dma_status);
+	u8 sc1d			= hwif->INB((high_16 + 0x001d));
+
+	if (hwif->channel) {
+		if ((sc1d & 0x50) == 0x50)
+			goto somebody_else;
+		else if ((sc1d & 0x40) == 0x40)
+			return (dma_stat & 4) == 4;
+	} else {
+		if ((sc1d & 0x05) == 0x05)
+			goto somebody_else;
+		else if ((sc1d & 0x04) == 0x04)
+			return (dma_stat & 4) == 4;
+	}
+somebody_else:
+	return (dma_stat & 4) == 4;	/* return 1 if INTR asserted */
+}
+
+static int pdc202xx_ide_dma_lostirq(ide_drive_t *drive)
+{
+	if (HWIF(drive)->resetproc != NULL)
+		HWIF(drive)->resetproc(drive);
+	return __ide_dma_lostirq(drive);
+}
+
+static int pdc202xx_ide_dma_timeout(ide_drive_t *drive)
+{
+	if (HWIF(drive)->resetproc != NULL)
+		HWIF(drive)->resetproc(drive);
+	return __ide_dma_timeout(drive);
+}
+
+static void pdc202xx_reset_host (ide_hwif_t *hwif)
+{
+#ifdef CONFIG_BLK_DEV_IDEDMA
+//	unsigned long high_16	= hwif->dma_base - (8*(hwif->channel));
+	unsigned long high_16	= hwif->dma_master;
+#else /* !CONFIG_BLK_DEV_IDEDMA */
+	unsigned long high_16	= pci_resource_start(hwif->pci_dev, 4);
+#endif /* CONFIG_BLK_DEV_IDEDMA */
+	u8 udma_speed_flag	= hwif->INB(high_16|0x001f);
+
+	hwif->OUTB((udma_speed_flag | 0x10), (high_16|0x001f));
+	mdelay(100);
+	hwif->OUTB((udma_speed_flag & ~0x10), (high_16|0x001f));
+	mdelay(2000);	/* 2 seconds ?! */
+
+	printk(KERN_WARNING "PDC202XX: %s channel reset.\n",
+		hwif->channel ? "Secondary" : "Primary");
+}
+
+void pdc202xx_reset (ide_drive_t *drive)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+	ide_hwif_t *mate	= hwif->mate;
+	
+	pdc202xx_reset_host(hwif);
+	pdc202xx_reset_host(mate);
+#if 0
+	/*
+	 * FIXME: Have to kick all the drives again :-/
+	 * What a pain in the ACE!
+	 */
+	if (hwif->present) {
+		u16 hunit = 0;
+		hwif->initializing = 1;
+		for (hunit = 0; hunit < MAX_DRIVES; ++hunit) {
+			ide_drive_t *hdrive = &hwif->drives[hunit];
+			if (hdrive->present) {
+				if (hwif->ide_dma_check)
+					hwif->ide_dma_check(hdrive);
+				else
+					hwif->tuneproc(hdrive, 5);
+			}
+		}
+		hwif->initializing = 0;
+	}
+	if (mate->present) {
+		u16 munit = 0;
+		mate->initializing = 1;
+		for (munit = 0; munit < MAX_DRIVES; ++munit) {
+			ide_drive_t *mdrive = &mate->drives[munit];
+			if (mdrive->present) {
+				if (mate->ide_dma_check) 
+					mate->ide_dma_check(mdrive);
+				else
+					mate->tuneproc(mdrive, 5);
+			}
+		}
+		mate->initializing = 0;
+	}
+#else
+	hwif->tuneproc(drive, 5);
+#endif
+}
+
+/*
+ * Since SUN Cobalt is attempting to do this operation, I should disclose
+ * this has been a long time ago Thu Jul 27 16:40:57 2000 was the patch date
+ * HOTSWAP ATA Infrastructure.
+ */
+static int pdc202xx_tristate (ide_drive_t * drive, int state)
+{
+	ide_hwif_t *hwif	= HWIF(drive);
+//	unsigned long high_16	= hwif->dma_base - (8*(hwif->channel));
+	unsigned long high_16	= hwif->dma_master;
+	u8 sc1f			= hwif->INB(high_16|0x001f);
+
+	if (!hwif)
+		return -EINVAL;
+
+//	hwif->bus_state = state;
+
+	if (state) {
+		hwif->OUTB(sc1f | 0x08, (high_16|0x001f));
+	} else {
+		hwif->OUTB(sc1f & ~0x08, (high_16|0x001f));
+	}
+	return 0;
+}
+
+static unsigned int __init init_chipset_pdc202xx (struct pci_dev *dev, const char *name)
+{
+	if (dev->resource[PCI_ROM_RESOURCE].start) {
+		pci_write_config_dword(dev, PCI_ROM_ADDRESS,
+			dev->resource[PCI_ROM_RESOURCE].start | PCI_ROM_ADDRESS_ENABLE);
+		printk(KERN_INFO "%s: ROM enabled at 0x%08lx\n",
+			name, dev->resource[PCI_ROM_RESOURCE].start);
+	}
+
+#if defined(DISPLAY_PDC202XX_TIMINGS) && defined(CONFIG_PROC_FS)
+	pdc202_devs[n_pdc202_devs++] = dev;
+
+	if (!pdc202xx_proc) {
+		pdc202xx_proc = 1;
+		ide_pci_register_host_proc(&pdc202xx_procs[0]);
+	}
+#endif /* DISPLAY_PDC202XX_TIMINGS && CONFIG_PROC_FS */
+
+	/*
+	 * software reset -  this is required because the bios
+	 * will set UDMA timing on if the hdd supports it. The
+	 * user may want to turn udma off. A bug in the pdc20262
+	 * is that it cannot handle a downgrade in timing from
+	 * UDMA to DMA. Disk accesses after issuing a set
+	 * feature command will result in errors. A software
+	 * reset leaves the timing registers intact,
+	 * but resets the drives.
+	 */
+#if 0
+	if ((dev->device == PCI_DEVICE_ID_PROMISE_20267) ||
+	    (dev->device == PCI_DEVICE_ID_PROMISE_20265) ||
+	    (dev->device == PCI_DEVICE_ID_PROMISE_20263) ||
+	    (dev->device == PCI_DEVICE_ID_PROMISE_20262)) {
+		unsigned long high_16	= pci_resource_start(dev, 4);
+		byte udma_speed_flag	= inb(high_16 + 0x001f);
+		outb(udma_speed_flag | 0x10, high_16 + 0x001f);
+		mdelay(100);
+		outb(udma_speed_flag & ~0x10, high_16 + 0x001f);
+		mdelay(2000);	/* 2 seconds ?! */
+	}
+
+#endif
+	return dev->irq;
+}
+
+static void __init init_hwif_pdc202xx (ide_hwif_t *hwif)
+{
+	hwif->autodma = 0;
+	hwif->tuneproc  = &config_chipset_for_pio;
+	hwif->quirkproc = &pdc202xx_quirkproc;
+
+	if (hwif->pci_dev->device == PCI_DEVICE_ID_PROMISE_20265)
+		hwif->addressing = (hwif->channel) ? 0 : 1;
+
+	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246) {
+		hwif->busproc   = &pdc202xx_tristate;
+		hwif->resetproc = &pdc202xx_reset;
+	}
+
+	hwif->speedproc = &pdc202xx_tune_chipset;
+
+	if (!hwif->dma_base) {
+		hwif->drives[0].autotune = hwif->drives[1].autotune = 1;
+		return;
+	}
+
+	hwif->ultra_mask = 0x3f;
+	hwif->mwdma_mask = 0x07;
+	hwif->swdma_mask = 0x07;
+
+	hwif->ide_dma_check = &pdc202xx_config_drive_xfer_rate;
+	hwif->ide_dma_lostirq = &pdc202xx_ide_dma_lostirq;
+	hwif->ide_dma_timeout = &pdc202xx_ide_dma_timeout;
+
+	if (hwif->pci_dev->device != PCI_DEVICE_ID_PROMISE_20246) {
+		if (!(hwif->udma_four))
+			hwif->udma_four = (pdc202xx_old_cable_detect(hwif)) ? 0 : 1;
+		hwif->ide_dma_begin = &pdc202xx_old_ide_dma_begin;
+		hwif->ide_dma_end = &pdc202xx_old_ide_dma_end;
+	} 
+	hwif->ide_dma_test_irq = &pdc202xx_old_ide_dma_test_irq;
+
+	if (!noautodma)
+		hwif->autodma = 1;
+	hwif->drives[0].autodma = hwif->drives[1].autodma = hwif->autodma;
+#if PDC202_DEBUG_CABLE
+	printk(KERN_DEBUG "%s: %s-pin cable\n",
+		hwif->name, hwif->udma_four ? "80" : "40");
+#endif /* PDC202_DEBUG_CABLE */	
+}
+
+static void __init init_dma_pdc202xx (ide_hwif_t *hwif, unsigned long dmabase)
+{
+	u8 udma_speed_flag = 0, primary_mode = 0, secondary_mode = 0;
+
+	if (hwif->channel) {
+		ide_setup_dma(hwif, dmabase, 8);
+		return;
+	}
+
+	udma_speed_flag	= hwif->INB((dmabase|0x1f));
+	primary_mode	= hwif->INB((dmabase|0x1a));
+	secondary_mode	= hwif->INB((dmabase|0x1b));
+	printk(KERN_INFO "%s: (U)DMA Burst Bit %sABLED " \
+		"Primary %s Mode " \
+		"Secondary %s Mode.\n", hwif->cds->name,
+		(udma_speed_flag & 1) ? "EN" : "DIS",
+		(primary_mode & 1) ? "MASTER" : "PCI",
+		(secondary_mode & 1) ? "MASTER" : "PCI" );
+
+#ifdef CONFIG_PDC202XX_BURST
+	if (!(udma_speed_flag & 1)) {
+		printk(KERN_INFO "%s: FORCING BURST BIT 0x%02x->0x%02x ",
+			hwif->cds->name, udma_speed_flag,
+			(udma_speed_flag|1));
+		hwif->OUTB(udma_speed_flag|1,(dmabase|0x1f));
+		printk("%sACTIVE\n",
+			(hwif->INB(dmabase|0x1f)&1) ? "":"IN");
+	}
+#endif /* CONFIG_PDC202XX_BURST */
+#ifdef CONFIG_PDC202XX_MASTER
+	if (!(primary_mode & 1)) {
+		printk(KERN_INFO "%s: FORCING PRIMARY MODE BIT "
+			"0x%02x -> 0x%02x ", hwif->cds->name,
+			primary_mode, (primary_mode|1));
+		hwif->OUTB(primary_mode|1, (dmabase|0x1a));
+		printk("%s\n",
+			(hwif->INB((dmabase|0x1a)) & 1) ? "MASTER" : "PCI");
+	}
+
+	if (!(secondary_mode & 1)) {
+		printk(KERN_INFO "%s: FORCING SECONDARY MODE BIT "
+			"0x%02x -> 0x%02x ", hwif->cds->name,
+			secondary_mode, (secondary_mode|1));
+		hwif->OUTB(secondary_mode|1, (dmabase|0x1b));
+		printk("%s\n",
+			(hwif->INB((dmabase|0x1b)) & 1) ? "MASTER" : "PCI");
+	}
+#endif /* CONFIG_PDC202XX_MASTER */
+
+	ide_setup_dma(hwif, dmabase, 8);
+}
+
+extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
+extern void ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
+
+static void __init init_setup_pdc202ata4 (struct pci_dev *dev, ide_pci_device_t *d)
+{
+	if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE) {
+		u8 irq = 0, irq2 = 0;
+		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
+		/* 0xbc */
+		pci_read_config_byte(dev, (PCI_INTERRUPT_LINE)|0x80, &irq2);
+		if (irq != irq2) {
+			pci_write_config_byte(dev,
+				(PCI_INTERRUPT_LINE)|0x80, irq);     /* 0xbc */
+			printk(KERN_INFO "%s: pci-config space interrupt "
+				"mirror fixed.\n", d->name);
+		}
+	}
+
+#if 0
+        if (dev->device == PCI_DEVICE_ID_PROMISE_20262)
+        if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
+             (tmp & e->mask) != e->val))
+
+        if (d->enablebits[0].reg != d->enablebits[1].reg) {
+                d->enablebits[0].reg    = d->enablebits[1].reg;
+                d->enablebits[0].mask   = d->enablebits[1].mask;
+                d->enablebits[0].val    = d->enablebits[1].val;
+        }
+#endif
+
+	ide_setup_pci_device(dev, d);
+}
+
+static void __init init_setup_pdc20265 (struct pci_dev *dev, ide_pci_device_t *d)
+{
+	if ((dev->bus->self) &&
+	    (dev->bus->self->vendor == PCI_VENDOR_ID_INTEL) &&
+	    ((dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960) ||
+	     (dev->bus->self->device == PCI_DEVICE_ID_INTEL_I960RM))) {
+		printk(KERN_INFO "ide: Skipping Promise PDC20265 "
+			"attached to I2O RAID controller.\n");
+		return;
+	}
+
+#if 0
+        {
+                u8 pri = 0, sec = 0;
+
+        if (e->reg && (pci_read_config_byte(dev, e->reg, &tmp) ||
+             (tmp & e->mask) != e->val))
+
+        if (d->enablebits[0].reg != d->enablebits[1].reg) {
+                d->enablebits[0].reg    = d->enablebits[1].reg;
+                d->enablebits[0].mask   = d->enablebits[1].mask;
+                d->enablebits[0].val    = d->enablebits[1].val;
+        }
+        }
+#endif
+
+	ide_setup_pci_device(dev, d);
+}
+
+static void __init init_setup_pdc202xx (struct pci_dev *dev, ide_pci_device_t *d)
+{
+	ide_setup_pci_device(dev, d);
+}
+
+/**
+ *	pdc202xx_init_one	-	called when a PDC202xx is found
+ *	@dev: the pdc202xx device
+ *	@id: the matching pci id
+ *
+ *	Called when the PCI registration layer (or the IDE initialization)
+ *	finds a device matching our IDE device tables.
+ */
+ 
+static int __devinit pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	ide_pci_device_t *d = &pdc202xx_chipsets[id->driver_data];
+
+	if (dev->device != d->device)
+		BUG();
+	d->init_setup(dev, d);
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static struct pci_device_id pdc202xx_pci_tbl[] __devinitdata = {
+	{ PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20246, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
+	{ PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20262, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1},
+	{ PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20263, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 2},
+	{ PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20265, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 3},
+	{ PCI_VENDOR_ID_PROMISE, PCI_DEVICE_ID_PROMISE_20267, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
+	{ 0, },
+};
+
+static struct pci_driver driver = {
+	.name		= "Promise Old IDE",
+	.id_table	= pdc202xx_pci_tbl,
+	.probe		= pdc202xx_init_one,
+};
+
+static int pdc202xx_ide_init(void)
+{
+	return ide_pci_register_driver(&driver);
+}
+
+static void pdc202xx_ide_exit(void)
+{
+	ide_pci_unregister_driver(&driver);
+}
+
+module_init(pdc202xx_ide_init);
+module_exit(pdc202xx_ide_exit);
+
+MODULE_AUTHOR("Andre Hedrick, Frank Tiernan");
+MODULE_DESCRIPTION("PCI driver module for older Promise IDE");
+MODULE_LICENSE("GPL");
+
+EXPORT_NO_SYMBOLS;
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)