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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [ide/] [legacy/] [qd65xx.c] - Rev 1275
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/* * 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> #ifdef CONFIG_BLK_DEV_QD65XX_MODULE # define _IDE_C # include "ide_modes.h" # undef _IDE_C #else # include "ide_modes.h" #endif /* CONFIG_BLK_DEV_QD65XX_MODULE */ #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, u8 reg) { unsigned long flags; spin_lock_irqsave(&io_request_lock, flags); outb(content,reg); spin_unlock_irqrestore(&io_request_lock, flags); } u8 __init qd_read_reg (u8 reg) { unsigned long flags; u8 read; spin_lock_irqsave(&io_request_lock, flags); read = inb(reg); spin_unlock_irqrestore(&io_request_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 = 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) { u8 savereg; u8 readreg; unsigned long flags; spin_lock_irqsave(&io_request_lock, flags); savereg = inb_p(port); outb_p(QD_TESTVAL, port); /* safe value */ readreg = inb_p(port); outb(savereg, port); spin_unlock_irqrestore(&io_request_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 */ void __init qd_setup (int unit, int base, int config, unsigned int data0, unsigned int data1, void (*tuneproc) (ide_drive_t *, u8 pio)) { ide_hwif_t *hwif = &ide_hwifs[unit]; hwif->chipset = ide_qd65xx; hwif->channel = unit; 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; #ifndef HWIF_PROBE_CLASSIC_METHOD probe_hwif_init(hwif); #endif /* HWIF_PROBE_CLASSIC_METHOD */ } /* * qd_unsetup: * * called to unsetup an ata channel : back to default values, unlinks tuning */ void __init qd_unsetup (int unit) { ide_hwif_t *hwif = &ide_hwifs[unit]; 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(unit?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 */ int __init qd_probe (int base) { 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 */ printk(KERN_NOTICE "%s: qd6500 at %#x\n", ide_hwifs[unit].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(unit, base, config, QD6500_DEF_DATA, QD6500_DEF_DATA, &qd6500_tune_drive); 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 */ printk(KERN_INFO "%s: qd6580: single IDE board\n", ide_hwifs[unit].name); qd_setup(unit, base, config | (control << 8), QD6580_DEF_DATA, QD6580_DEF_DATA2, &qd6580_tune_drive); qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT); return 1; } else { /* secondary enabled */ printk(KERN_INFO "%s&%s: qd6580: dual IDE board\n", ide_hwifs[0].name,ide_hwifs[1].name); qd_setup(0, base, config | (control << 8), QD6580_DEF_DATA, QD6580_DEF_DATA, &qd6580_tune_drive); qd_setup(1, base, config | (control << 8), QD6580_DEF_DATA2, QD6580_DEF_DATA2, &qd6580_tune_drive); qd_write_reg(QD_DEF_CONTR,QD_CONTROL_PORT); return 0; /* no other qd65xx possible */ } } /* no qd65xx found */ return 1; } #ifndef MODULE /* * init_qd65xx: * * called by ide.c when parsing command line */ void __init init_qd65xx (void) { if (qd_probe(0x30)) qd_probe(0xb0); } #else MODULE_AUTHOR("Samuel Thibault"); MODULE_DESCRIPTION("support of qd65xx vlb ide chipset"); MODULE_LICENSE("GPL"); int __init qd65xx_mod_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; } module_init(qd65xx_mod_init); void __init qd65xx_mod_exit(void) { qd_unsetup(0); qd_unsetup(1); } module_exit(qd65xx_mod_exit); #endif
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