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");