/* * linux/drivers/ide/qd65xx.c Version 0.06 Aug 3, 2000 * * Copyright (C) 1996-2000 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 * * 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 by * Samuel Thibault */ #undef REALLY_SLOW_IO /* most systems can safely undef this */ #include #include #include #include #include #include #include #include #include #include #include #include "ide_modes.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 (byte content, byte reg) { unsigned long flags; save_flags(flags); /* all CPUs */ cli(); /* all CPUs */ outb(content,reg); restore_flags(flags); /* all CPUs */ } byte __init qd_read_reg (byte reg) { unsigned long flags; byte read; save_flags(flags); /* all CPUs */ cli(); /* all CPUs */ read = inb(reg); restore_flags(flags); /* all CPUs */ 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) { byte 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 byte qd6500_compute_timing (ide_hwif_t *hwif, int active_time, int recovery_time) { byte 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 byte qd6580_compute_timing (int active_time, int recovery_time) { byte active_cycle = 17-IDE_IN(active_time * system_bus_clock() / 1000 + 1, 2, 17); byte 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, byte 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, byte 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, byte 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 = IDE_MIN(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) { byte savereg; byte readreg; unsigned long flags; save_flags(flags); /* all CPUs */ cli(); /* all CPUs */ savereg = inb_p(port); outb_p(QD_TESTVAL,port); /* safe value */ readreg = inb_p(port); outb(savereg,port); restore_flags(flags); /* all CPUs */ 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); } /* * probe: * * looks at the specified baseport, and if qd found, registers & initialises it * return 1 if another qd may be probed */ int __init probe (int base) { byte config; byte index; config = qd_read_reg(QD_CONFIG_PORT); if (! ((config & QD_CONFIG_BASEPORT) >> 1 == (base == 0xb0)) ) return 1; index = ! (config & QD_CONFIG_IDE_BASEPORT); if ((config & 0xf0) == QD_CONFIG_QD6500) { ide_hwif_t *hwif = &ide_hwifs[index]; if (qd_testreg(base)) return 1; /* bad register */ /* qd6500 found */ printk(KERN_NOTICE "%s: qd6500 at %#x\n", ide_hwifs[index].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; } hwif->chipset = ide_qd65xx; hwif->select_data = base; hwif->config_data = config; hwif->drives[0].drive_data = hwif->drives[1].drive_data = QD6500_DEF_DATA; hwif->drives[0].io_32bit = hwif->drives[1].io_32bit = 1; hwif->tuneproc = &qd6500_tune_drive; return 1; } if (((config & 0xf0) == QD_CONFIG_QD6580_A) || ((config & 0xf0) == QD_CONFIG_QD6580_B)) { byte 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) { ide_hwif_t *hwif = &ide_hwifs[index]; /* secondary disabled */ printk(KERN_INFO "%s: qd6580: single IDE board\n", ide_hwifs[index].name); hwif->chipset = ide_qd65xx; hwif->select_data = base; hwif->config_data = config | (control <<8); hwif->drives[0].drive_data = hwif->drives[1].drive_data = QD6580_DEF_DATA; hwif->drives[0].io_32bit = hwif->drives[1].io_32bit = 1; hwif->tuneproc = &qd6580_tune_drive; qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT); return 1; } else { int i,j; /* secondary enabled */ printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n", ide_hwifs[0].name,ide_hwifs[1].name); for (i=0;i<2;i++) { ide_hwifs[i].chipset = ide_qd65xx; ide_hwifs[i].mate = &ide_hwifs[i^1]; ide_hwifs[i].channel = i; ide_hwifs[i].select_data = base; ide_hwifs[i].config_data = config | (control <<8); ide_hwifs[i].tuneproc = &qd6580_tune_drive; for (j=0;j<2;j++) { ide_hwifs[i].drives[j].drive_data = QD6580_DEF_DATA; ide_hwifs[i].drives[j].io_32bit = 1; } } qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT); return 0; /* no other qd65xx possible */ } } /* no qd65xx found */ return 1; } /* * init_qd65xx: * * called at the very beginning of initialization ; should just probe and link */ void __init init_qd65xx (void) { if (probe(0x30)) probe(0xb0); }