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path: root/drivers/ide/legacy/qd65xx.c
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Diffstat (limited to 'drivers/ide/legacy/qd65xx.c')
-rw-r--r--drivers/ide/legacy/qd65xx.c511
1 files changed, 511 insertions, 0 deletions
diff --git a/drivers/ide/legacy/qd65xx.c b/drivers/ide/legacy/qd65xx.c
new file mode 100644
index 000000000000..563fab0098be
--- /dev/null
+++ b/drivers/ide/legacy/qd65xx.c
@@ -0,0 +1,511 @@
+/*
+ * linux/drivers/ide/legacy/qd65xx.c Version 0.07 Sep 30, 2001
+ *
+ * Copyright (C) 1996-2001 Linus Torvalds & author (see below)
+ */
+
+/*
+ * Version 0.03 Cleaned auto-tune, added probe
+ * Version 0.04 Added second channel tuning
+ * Version 0.05 Enhanced tuning ; added qd6500 support
+ * Version 0.06 Added dos driver's list
+ * Version 0.07 Second channel bug fix
+ *
+ * QDI QD6500/QD6580 EIDE controller fast support
+ *
+ * Please set local bus speed using kernel parameter idebus
+ * for example, "idebus=33" stands for 33Mhz VLbus
+ * To activate controller support, use "ide0=qd65xx"
+ * To enable tuning, use "ide0=autotune"
+ * To enable second channel tuning (qd6580 only), use "ide1=autotune"
+ */
+
+/*
+ * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
+ * Samuel Thibault <samuel.thibault@fnac.net>
+ */
+
+#undef REALLY_SLOW_IO /* most systems can safely undef this */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/types.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/ide.h>
+#include <linux/init.h>
+#include <asm/system.h>
+#include <asm/io.h>
+
+#include "qd65xx.h"
+
+/*
+ * I/O ports are 0x30-0x31 (and 0x32-0x33 for qd6580)
+ * or 0xb0-0xb1 (and 0xb2-0xb3 for qd6580)
+ * -- qd6500 is a single IDE interface
+ * -- qd6580 is a dual IDE interface
+ *
+ * More research on qd6580 being done by willmore@cig.mot.com (David)
+ * More Information given by Petr Soucek (petr@ryston.cz)
+ * http://www.ryston.cz/petr/vlb
+ */
+
+/*
+ * base: Timer1
+ *
+ *
+ * base+0x01: Config (R/O)
+ *
+ * bit 0: ide baseport: 1 = 0x1f0 ; 0 = 0x170 (only useful for qd6500)
+ * bit 1: qd65xx baseport: 1 = 0xb0 ; 0 = 0x30
+ * bit 2: ID3: bus speed: 1 = <=33MHz ; 0 = >33MHz
+ * bit 3: qd6500: 1 = disabled, 0 = enabled
+ * qd6580: 1
+ * upper nibble:
+ * qd6500: 1100
+ * qd6580: either 1010 or 0101
+ *
+ *
+ * base+0x02: Timer2 (qd6580 only)
+ *
+ *
+ * base+0x03: Control (qd6580 only)
+ *
+ * bits 0-3 must always be set 1
+ * bit 4 must be set 1, but is set 0 by dos driver while measuring vlb clock
+ * bit 0 : 1 = Only primary port enabled : channel 0 for hda, channel 1 for hdb
+ * 0 = Primary and Secondary ports enabled : channel 0 for hda & hdb
+ * channel 1 for hdc & hdd
+ * bit 1 : 1 = only disks on primary port
+ * 0 = disks & ATAPI devices on primary port
+ * bit 2-4 : always 0
+ * bit 5 : status, but of what ?
+ * bit 6 : always set 1 by dos driver
+ * bit 7 : set 1 for non-ATAPI devices on primary port
+ * (maybe read-ahead and post-write buffer ?)
+ */
+
+static int timings[4]={-1,-1,-1,-1}; /* stores current timing for each timer */
+
+static void qd_write_reg (u8 content, unsigned long reg)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&ide_lock, flags);
+ outb(content,reg);
+ spin_unlock_irqrestore(&ide_lock, flags);
+}
+
+static u8 __init qd_read_reg (unsigned long reg)
+{
+ unsigned long flags;
+ u8 read;
+
+ spin_lock_irqsave(&ide_lock, flags);
+ read = inb(reg);
+ spin_unlock_irqrestore(&ide_lock, flags);
+ return read;
+}
+
+/*
+ * qd_select:
+ *
+ * This routine is invoked from ide.c to prepare for access to a given drive.
+ */
+
+static void qd_select (ide_drive_t *drive)
+{
+ u8 index = (( (QD_TIMREG(drive)) & 0x80 ) >> 7) |
+ (QD_TIMREG(drive) & 0x02);
+
+ if (timings[index] != QD_TIMING(drive))
+ qd_write_reg(timings[index] = QD_TIMING(drive), QD_TIMREG(drive));
+}
+
+/*
+ * qd6500_compute_timing
+ *
+ * computes the timing value where
+ * lower nibble represents active time, in count of VLB clocks
+ * upper nibble represents recovery time, in count of VLB clocks
+ */
+
+static u8 qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time)
+{
+ u8 active_cycle,recovery_cycle;
+
+ if (system_bus_clock()<=33) {
+ active_cycle = 9 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 9);
+ recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 0, 15);
+ } else {
+ active_cycle = 8 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 1, 8);
+ recovery_cycle = 18 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 3, 18);
+ }
+
+ return((recovery_cycle<<4) | 0x08 | active_cycle);
+}
+
+/*
+ * qd6580_compute_timing
+ *
+ * idem for qd6580
+ */
+
+static u8 qd6580_compute_timing (int active_time, int recovery_time)
+{
+ u8 active_cycle = 17 - IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17);
+ u8 recovery_cycle = 15 - IDE_IN(recovery_time * system_bus_clock() / 1000 + 1, 2, 15);
+
+ return((recovery_cycle<<4) | active_cycle);
+}
+
+/*
+ * qd_find_disk_type
+ *
+ * tries to find timing from dos driver's table
+ */
+
+static int qd_find_disk_type (ide_drive_t *drive,
+ int *active_time, int *recovery_time)
+{
+ struct qd65xx_timing_s *p;
+ char model[40];
+
+ if (!*drive->id->model) return 0;
+
+ strncpy(model,drive->id->model,40);
+ ide_fixstring(model,40,1); /* byte-swap */
+
+ for (p = qd65xx_timing ; p->offset != -1 ; p++) {
+ if (!strncmp(p->model, model+p->offset, 4)) {
+ printk(KERN_DEBUG "%s: listed !\n", drive->name);
+ *active_time = p->active;
+ *recovery_time = p->recovery;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * qd_timing_ok:
+ *
+ * check whether timings don't conflict
+ */
+
+static int qd_timing_ok (ide_drive_t drives[])
+{
+ return (IDE_IMPLY(drives[0].present && drives[1].present,
+ IDE_IMPLY(QD_TIMREG(drives) == QD_TIMREG(drives+1),
+ QD_TIMING(drives) == QD_TIMING(drives+1))));
+ /* if same timing register, must be same timing */
+}
+
+/*
+ * qd_set_timing:
+ *
+ * records the timing, and enables selectproc as needed
+ */
+
+static void qd_set_timing (ide_drive_t *drive, u8 timing)
+{
+ ide_hwif_t *hwif = HWIF(drive);
+
+ drive->drive_data &= 0xff00;
+ drive->drive_data |= timing;
+ if (qd_timing_ok(hwif->drives)) {
+ qd_select(drive); /* selects once */
+ hwif->selectproc = NULL;
+ } else
+ hwif->selectproc = &qd_select;
+
+ printk(KERN_DEBUG "%s: %#x\n", drive->name, timing);
+}
+
+/*
+ * qd6500_tune_drive
+ */
+
+static void qd6500_tune_drive (ide_drive_t *drive, u8 pio)
+{
+ int active_time = 175;
+ int recovery_time = 415; /* worst case values from the dos driver */
+
+ if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)
+ && drive->id->tPIO && (drive->id->field_valid & 0x02)
+ && drive->id->eide_pio >= 240) {
+
+ printk(KERN_INFO "%s: PIO mode%d\n", drive->name,
+ drive->id->tPIO);
+ active_time = 110;
+ recovery_time = drive->id->eide_pio - 120;
+ }
+
+ qd_set_timing(drive, qd6500_compute_timing(HWIF(drive), active_time, recovery_time));
+}
+
+/*
+ * qd6580_tune_drive
+ */
+
+static void qd6580_tune_drive (ide_drive_t *drive, u8 pio)
+{
+ ide_pio_data_t d;
+ int base = HWIF(drive)->select_data;
+ int active_time = 175;
+ int recovery_time = 415; /* worst case values from the dos driver */
+
+ if (drive->id && !qd_find_disk_type(drive, &active_time, &recovery_time)) {
+ pio = ide_get_best_pio_mode(drive, pio, 255, &d);
+ pio = min_t(u8, pio, 4);
+
+ switch (pio) {
+ case 0: break;
+ case 3:
+ if (d.cycle_time >= 110) {
+ active_time = 86;
+ recovery_time = d.cycle_time - 102;
+ } else
+ printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+ break;
+ case 4:
+ if (d.cycle_time >= 69) {
+ active_time = 70;
+ recovery_time = d.cycle_time - 61;
+ } else
+ printk(KERN_WARNING "%s: Strange recovery time !\n",drive->name);
+ break;
+ default:
+ if (d.cycle_time >= 180) {
+ active_time = 110;
+ recovery_time = d.cycle_time - 120;
+ } else {
+ active_time = ide_pio_timings[pio].active_time;
+ recovery_time = d.cycle_time
+ -active_time;
+ }
+ }
+ printk(KERN_INFO "%s: PIO mode%d\n", drive->name,pio);
+ }
+
+ if (!HWIF(drive)->channel && drive->media != ide_disk) {
+ qd_write_reg(0x5f, QD_CONTROL_PORT);
+ printk(KERN_WARNING "%s: ATAPI: disabled read-ahead FIFO "
+ "and post-write buffer on %s.\n",
+ drive->name, HWIF(drive)->name);
+ }
+
+ qd_set_timing(drive, qd6580_compute_timing(active_time, recovery_time));
+}
+
+/*
+ * qd_testreg
+ *
+ * tests if the given port is a register
+ */
+
+static int __init qd_testreg(int port)
+{
+ u8 savereg;
+ u8 readreg;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ide_lock, flags);
+ savereg = inb_p(port);
+ outb_p(QD_TESTVAL, port); /* safe value */
+ readreg = inb_p(port);
+ outb(savereg, port);
+ spin_unlock_irqrestore(&ide_lock, flags);
+
+ if (savereg == QD_TESTVAL) {
+ printk(KERN_ERR "Outch ! the probe for qd65xx isn't reliable !\n");
+ printk(KERN_ERR "Please contact maintainers to tell about your hardware\n");
+ printk(KERN_ERR "Assuming qd65xx is not present.\n");
+ return 1;
+ }
+
+ return (readreg != QD_TESTVAL);
+}
+
+/*
+ * qd_setup:
+ *
+ * called to setup an ata channel : adjusts attributes & links for tuning
+ */
+
+static void __init qd_setup(ide_hwif_t *hwif, int base, int config,
+ unsigned int data0, unsigned int data1,
+ void (*tuneproc) (ide_drive_t *, u8 pio))
+{
+ hwif->chipset = ide_qd65xx;
+ hwif->channel = hwif->index;
+ hwif->select_data = base;
+ hwif->config_data = config;
+ hwif->drives[0].drive_data = data0;
+ hwif->drives[1].drive_data = data1;
+ hwif->drives[0].io_32bit =
+ hwif->drives[1].io_32bit = 1;
+ hwif->tuneproc = tuneproc;
+ probe_hwif_init(hwif);
+}
+
+/*
+ * qd_unsetup:
+ *
+ * called to unsetup an ata channel : back to default values, unlinks tuning
+ */
+/*
+static void __exit qd_unsetup(ide_hwif_t *hwif)
+{
+ u8 config = hwif->config_data;
+ int base = hwif->select_data;
+ void *tuneproc = (void *) hwif->tuneproc;
+
+ if (hwif->chipset != ide_qd65xx)
+ return;
+
+ printk(KERN_NOTICE "%s: back to defaults\n", hwif->name);
+
+ hwif->selectproc = NULL;
+ hwif->tuneproc = NULL;
+
+ if (tuneproc == (void *) qd6500_tune_drive) {
+ // will do it for both
+ qd_write_reg(QD6500_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
+ } else if (tuneproc == (void *) qd6580_tune_drive) {
+ if (QD_CONTROL(hwif) & QD_CONTR_SEC_DISABLED) {
+ qd_write_reg(QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
+ qd_write_reg(QD6580_DEF_DATA2, QD_TIMREG(&hwif->drives[1]));
+ } else {
+ qd_write_reg(hwif->channel ? QD6580_DEF_DATA2 : QD6580_DEF_DATA, QD_TIMREG(&hwif->drives[0]));
+ }
+ } else {
+ printk(KERN_WARNING "Unknown qd65xx tuning fonction !\n");
+ printk(KERN_WARNING "keeping settings !\n");
+ }
+}
+*/
+
+/*
+ * qd_probe:
+ *
+ * looks at the specified baseport, and if qd found, registers & initialises it
+ * return 1 if another qd may be probed
+ */
+
+static int __init qd_probe(int base)
+{
+ ide_hwif_t *hwif;
+ u8 config;
+ u8 unit;
+
+ config = qd_read_reg(QD_CONFIG_PORT);
+
+ if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) )
+ return 1;
+
+ unit = ! (config & QD_CONFIG_IDE_BASEPORT);
+
+ if ((config & 0xf0) == QD_CONFIG_QD6500) {
+
+ if (qd_testreg(base)) return 1; /* bad register */
+
+ /* qd6500 found */
+
+ hwif = &ide_hwifs[unit];
+ printk(KERN_NOTICE "%s: qd6500 at %#x\n", hwif->name, base);
+ printk(KERN_DEBUG "qd6500: config=%#x, ID3=%u\n",
+ config, QD_ID3);
+
+ if (config & QD_CONFIG_DISABLED) {
+ printk(KERN_WARNING "qd6500 is disabled !\n");
+ return 1;
+ }
+
+ qd_setup(hwif, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA,
+ &qd6500_tune_drive);
+
+ create_proc_ide_interfaces();
+
+ return 1;
+ }
+
+ if (((config & 0xf0) == QD_CONFIG_QD6580_A) ||
+ ((config & 0xf0) == QD_CONFIG_QD6580_B)) {
+
+ u8 control;
+
+ if (qd_testreg(base) || qd_testreg(base+0x02)) return 1;
+ /* bad registers */
+
+ /* qd6580 found */
+
+ control = qd_read_reg(QD_CONTROL_PORT);
+
+ printk(KERN_NOTICE "qd6580 at %#x\n", base);
+ printk(KERN_DEBUG "qd6580: config=%#x, control=%#x, ID3=%u\n",
+ config, control, QD_ID3);
+
+ if (control & QD_CONTR_SEC_DISABLED) {
+ /* secondary disabled */
+
+ hwif = &ide_hwifs[unit];
+ printk(KERN_INFO "%s: qd6580: single IDE board\n",
+ hwif->name);
+ qd_setup(hwif, base, config | (control << 8),
+ QD6580_DEF_DATA, QD6580_DEF_DATA2,
+ &qd6580_tune_drive);
+ qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
+
+ create_proc_ide_interfaces();
+
+ return 1;
+ } else {
+ ide_hwif_t *mate;
+
+ hwif = &ide_hwifs[0];
+ mate = &ide_hwifs[1];
+ /* secondary enabled */
+ printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n",
+ hwif->name, mate->name);
+
+ qd_setup(hwif, base, config | (control << 8),
+ QD6580_DEF_DATA, QD6580_DEF_DATA,
+ &qd6580_tune_drive);
+ qd_setup(mate, base, config | (control << 8),
+ QD6580_DEF_DATA2, QD6580_DEF_DATA2,
+ &qd6580_tune_drive);
+ qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT);
+
+ create_proc_ide_interfaces();
+
+ return 0; /* no other qd65xx possible */
+ }
+ }
+ /* no qd65xx found */
+ return 1;
+}
+
+/* Can be called directly from ide.c. */
+int __init qd65xx_init(void)
+{
+ if (qd_probe(0x30))
+ qd_probe(0xb0);
+ if (ide_hwifs[0].chipset != ide_qd65xx &&
+ ide_hwifs[1].chipset != ide_qd65xx)
+ return -ENODEV;
+ return 0;
+}
+
+#ifdef MODULE
+module_init(qd65xx_init);
+#endif
+
+MODULE_AUTHOR("Samuel Thibault");
+MODULE_DESCRIPTION("support of qd65xx vlb ide chipset");
+MODULE_LICENSE("GPL");
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