piix.c
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上传日期:2013-04-10
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文件大小:16k
- /*
- * linux/drivers/ide/piix.c Version 0.32 June 9, 2000
- *
- * Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
- * Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
- * May be copied or modified under the terms of the GNU General Public License
- *
- * PIO mode setting function for Intel chipsets.
- * For use instead of BIOS settings.
- *
- * 40-41
- * 42-43
- *
- * 41
- * 43
- *
- * | PIO 0 | c0 | 80 | 0 | piix_tune_drive(drive, 0);
- * | PIO 2 | SW2 | d0 | 90 | 4 | piix_tune_drive(drive, 2);
- * | PIO 3 | MW1 | e1 | a1 | 9 | piix_tune_drive(drive, 3);
- * | PIO 4 | MW2 | e3 | a3 | b | piix_tune_drive(drive, 4);
- *
- * sitre = word40 & 0x4000; primary
- * sitre = word42 & 0x4000; secondary
- *
- * 44 8421|8421 hdd|hdb
- *
- * 48 8421 hdd|hdc|hdb|hda udma enabled
- *
- * 0001 hda
- * 0010 hdb
- * 0100 hdc
- * 1000 hdd
- *
- * 4a 84|21 hdb|hda
- * 4b 84|21 hdd|hdc
- *
- * ata-33/82371AB
- * ata-33/82371EB
- * ata-33/82801AB ata-66/82801AA
- * 00|00 udma 0 00|00 reserved
- * 01|01 udma 1 01|01 udma 3
- * 10|10 udma 2 10|10 udma 4
- * 11|11 reserved 11|11 reserved
- *
- * 54 8421|8421 ata66 drive|ata66 enable
- *
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x40, ®40);
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x42, ®42);
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x44, ®44);
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x48, ®48);
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x4a, ®4a);
- * pci_read_config_word(HWIF(drive)->pci_dev, 0x54, ®54);
- *
- */
- #include <linux/config.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/ioport.h>
- #include <linux/pci.h>
- #include <linux/hdreg.h>
- #include <linux/ide.h>
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <asm/io.h>
- #include "ide_modes.h"
- #define PIIX_DEBUG_DRIVE_INFO 0
- #define DISPLAY_PIIX_TIMINGS
- #if defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS)
- #include <linux/stat.h>
- #include <linux/proc_fs.h>
- static int piix_get_info(char *, char **, off_t, int);
- extern int (*piix_display_info)(char *, char **, off_t, int); /* ide-proc.c */
- extern char *ide_media_verbose(ide_drive_t *);
- static struct pci_dev *bmide_dev;
- static int piix_get_info (char *buffer, char **addr, off_t offset, int count)
- {
- char *p = buffer;
- u32 bibma = pci_resource_start(bmide_dev, 4);
- u16 reg40 = 0, psitre = 0, reg42 = 0, ssitre = 0;
- u8 c0 = 0, c1 = 0;
- u8 reg44 = 0, reg48 = 0, reg4a = 0, reg4b = 0, reg54 = 0, reg55 = 0;
- switch(bmide_dev->device) {
- case PCI_DEVICE_ID_INTEL_82801BA_8:
- case PCI_DEVICE_ID_INTEL_82801BA_9:
- case PCI_DEVICE_ID_INTEL_82801CA_10:
- case PCI_DEVICE_ID_INTEL_82801CA_11:
- case PCI_DEVICE_ID_INTEL_82801DB_11:
- case PCI_DEVICE_ID_INTEL_82801E_11:
- p += sprintf(p, "n Intel PIIX4 Ultra 100 Chipset.n");
- break;
- case PCI_DEVICE_ID_INTEL_82372FB_1:
- case PCI_DEVICE_ID_INTEL_82801AA_1:
- p += sprintf(p, "n Intel PIIX4 Ultra 66 Chipset.n");
- break;
- case PCI_DEVICE_ID_INTEL_82451NX:
- case PCI_DEVICE_ID_INTEL_82801AB_1:
- case PCI_DEVICE_ID_INTEL_82443MX_1:
- case PCI_DEVICE_ID_INTEL_82371AB:
- p += sprintf(p, "n Intel PIIX4 Ultra 33 Chipset.n");
- break;
- case PCI_DEVICE_ID_INTEL_82371SB_1:
- p += sprintf(p, "n Intel PIIX3 Chipset.n");
- break;
- case PCI_DEVICE_ID_INTEL_82371MX:
- p += sprintf(p, "n Intel MPIIX Chipset.n");
- return p-buffer; /* => must be less than 4k! */
- case PCI_DEVICE_ID_INTEL_82371FB_1:
- case PCI_DEVICE_ID_INTEL_82371FB_0:
- default:
- p += sprintf(p, "n Intel PIIX Chipset.n");
- break;
- }
- pci_read_config_word(bmide_dev, 0x40, ®40);
- pci_read_config_word(bmide_dev, 0x42, ®42);
- pci_read_config_byte(bmide_dev, 0x44, ®44);
- pci_read_config_byte(bmide_dev, 0x48, ®48);
- pci_read_config_byte(bmide_dev, 0x4a, ®4a);
- pci_read_config_byte(bmide_dev, 0x4b, ®4b);
- pci_read_config_byte(bmide_dev, 0x54, ®54);
- pci_read_config_byte(bmide_dev, 0x55, ®55);
- psitre = (reg40 & 0x4000) ? 1 : 0;
- ssitre = (reg42 & 0x4000) ? 1 : 0;
- /*
- * at that point bibma+0x2 et bibma+0xa are byte registers
- * to investigate:
- */
- c0 = inb_p((unsigned short)bibma + 0x02);
- c1 = inb_p((unsigned short)bibma + 0x0a);
- p += sprintf(p, "--------------- Primary Channel ---------------- Secondary Channel -------------n");
- p += sprintf(p, " %sabled %sabledn",
- (c0&0x80) ? "dis" : " en",
- (c1&0x80) ? "dis" : " en");
- p += sprintf(p, "--------------- drive0 --------- drive1 -------- drive0 ---------- drive1 ------n");
- p += sprintf(p, "DMA enabled: %s %s %s %sn",
- (c0&0x20) ? "yes" : "no ",
- (c0&0x40) ? "yes" : "no ",
- (c1&0x20) ? "yes" : "no ",
- (c1&0x40) ? "yes" : "no " );
- p += sprintf(p, "UDMA enabled: %s %s %s %sn",
- (reg48&0x01) ? "yes" : "no ",
- (reg48&0x02) ? "yes" : "no ",
- (reg48&0x04) ? "yes" : "no ",
- (reg48&0x08) ? "yes" : "no " );
- p += sprintf(p, "UDMA enabled: %s %s %s %sn",
- ((reg54&0x11) && (reg55&0x10) && (reg4a&0x01)) ? "5" :
- ((reg54&0x11) && (reg4a&0x02)) ? "4" :
- ((reg54&0x11) && (reg4a&0x01)) ? "3" :
- (reg4a&0x02) ? "2" :
- (reg4a&0x01) ? "1" :
- (reg4a&0x00) ? "0" : "X",
- ((reg54&0x22) && (reg55&0x20) && (reg4a&0x10)) ? "5" :
- ((reg54&0x22) && (reg4a&0x20)) ? "4" :
- ((reg54&0x22) && (reg4a&0x10)) ? "3" :
- (reg4a&0x20) ? "2" :
- (reg4a&0x10) ? "1" :
- (reg4a&0x00) ? "0" : "X",
- ((reg54&0x44) && (reg55&0x40) && (reg4b&0x03)) ? "5" :
- ((reg54&0x44) && (reg4b&0x02)) ? "4" :
- ((reg54&0x44) && (reg4b&0x01)) ? "3" :
- (reg4b&0x02) ? "2" :
- (reg4b&0x01) ? "1" :
- (reg4b&0x00) ? "0" : "X",
- ((reg54&0x88) && (reg55&0x80) && (reg4b&0x30)) ? "5" :
- ((reg54&0x88) && (reg4b&0x20)) ? "4" :
- ((reg54&0x88) && (reg4b&0x10)) ? "3" :
- (reg4b&0x20) ? "2" :
- (reg4b&0x10) ? "1" :
- (reg4b&0x00) ? "0" : "X");
- p += sprintf(p, "UDMAn");
- p += sprintf(p, "DMAn");
- p += sprintf(p, "PIOn");
- /*
- * FIXME.... Add configuration junk data....blah blah......
- */
- return p-buffer; /* => must be less than 4k! */
- }
- #endif /* defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS) */
- /*
- * Used to set Fifo configuration via kernel command line:
- */
- byte piix_proc = 0;
- extern char *ide_xfer_verbose (byte xfer_rate);
- #if defined(CONFIG_BLK_DEV_IDEDMA) && defined(CONFIG_PIIX_TUNING)
- /*
- *
- */
- static byte piix_dma_2_pio (byte xfer_rate) {
- switch(xfer_rate) {
- case XFER_UDMA_5:
- case XFER_UDMA_4:
- case XFER_UDMA_3:
- case XFER_UDMA_2:
- case XFER_UDMA_1:
- case XFER_UDMA_0:
- case XFER_MW_DMA_2:
- case XFER_PIO_4:
- return 4;
- case XFER_MW_DMA_1:
- case XFER_PIO_3:
- return 3;
- case XFER_SW_DMA_2:
- case XFER_PIO_2:
- return 2;
- case XFER_MW_DMA_0:
- case XFER_SW_DMA_1:
- case XFER_SW_DMA_0:
- case XFER_PIO_1:
- case XFER_PIO_0:
- case XFER_PIO_SLOW:
- default:
- return 0;
- }
- }
- #endif /* defined(CONFIG_BLK_DEV_IDEDMA) && (CONFIG_PIIX_TUNING) */
- /*
- * Based on settings done by AMI BIOS
- * (might be useful if drive is not registered in CMOS for any reason).
- */
- static void piix_tune_drive (ide_drive_t *drive, byte pio)
- {
- unsigned long flags;
- u16 master_data;
- byte slave_data;
- int is_slave = (&HWIF(drive)->drives[1] == drive);
- int master_port = HWIF(drive)->index ? 0x42 : 0x40;
- int slave_port = 0x44;
- /* ISP RTC */
- byte timings[][2] = { { 0, 0 },
- { 0, 0 },
- { 1, 0 },
- { 2, 1 },
- { 2, 3 }, };
- pio = ide_get_best_pio_mode(drive, pio, 5, NULL);
- pci_read_config_word(HWIF(drive)->pci_dev, master_port, &master_data);
- if (is_slave) {
- master_data = master_data | 0x4000;
- if (pio > 1)
- /* enable PPE, IE and TIME */
- master_data = master_data | 0x0070;
- pci_read_config_byte(HWIF(drive)->pci_dev, slave_port, &slave_data);
- slave_data = slave_data & (HWIF(drive)->index ? 0x0f : 0xf0);
- slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1])
- << (HWIF(drive)->index ? 4 : 0));
- } else {
- master_data = master_data & 0xccf8;
- if (pio > 1)
- /* enable PPE, IE and TIME */
- master_data = master_data | 0x0007;
- master_data = master_data | (timings[pio][0] << 12) |
- (timings[pio][1] << 8);
- }
- save_flags(flags);
- cli();
- pci_write_config_word(HWIF(drive)->pci_dev, master_port, master_data);
- if (is_slave)
- pci_write_config_byte(HWIF(drive)->pci_dev, slave_port, slave_data);
- restore_flags(flags);
- }
- #if defined(CONFIG_BLK_DEV_IDEDMA) && defined(CONFIG_PIIX_TUNING)
- static int piix_tune_chipset (ide_drive_t *drive, byte speed)
- {
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = hwif->pci_dev;
- byte maslave = hwif->channel ? 0x42 : 0x40;
- int a_speed = 3 << (drive->dn * 4);
- int u_flag = 1 << drive->dn;
- int v_flag = 0x01 << drive->dn;
- int w_flag = 0x10 << drive->dn;
- int u_speed = 0;
- int err = 0;
- int sitre;
- short reg4042, reg44, reg48, reg4a, reg54;
- byte reg55;
- pci_read_config_word(dev, maslave, ®4042);
- sitre = (reg4042 & 0x4000) ? 1 : 0;
- pci_read_config_word(dev, 0x44, ®44);
- pci_read_config_word(dev, 0x48, ®48);
- pci_read_config_word(dev, 0x4a, ®4a);
- pci_read_config_word(dev, 0x54, ®54);
- pci_read_config_byte(dev, 0x55, ®55);
- switch(speed) {
- case XFER_UDMA_4:
- case XFER_UDMA_2: u_speed = 2 << (drive->dn * 4); break;
- case XFER_UDMA_5:
- case XFER_UDMA_3:
- case XFER_UDMA_1: u_speed = 1 << (drive->dn * 4); break;
- case XFER_UDMA_0: u_speed = 0 << (drive->dn * 4); break;
- case XFER_MW_DMA_2:
- case XFER_MW_DMA_1:
- case XFER_SW_DMA_2: break;
- default: return -1;
- }
- if (speed >= XFER_UDMA_0) {
- if (!(reg48 & u_flag))
- pci_write_config_word(dev, 0x48, reg48|u_flag);
- if (speed == XFER_UDMA_5) {
- pci_write_config_byte(dev, 0x55, (byte) reg55|w_flag);
- } else {
- pci_write_config_byte(dev, 0x55, (byte) reg55 & ~w_flag);
- }
- if (!(reg4a & u_speed)) {
- pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
- pci_write_config_word(dev, 0x4a, reg4a|u_speed);
- }
- if (speed > XFER_UDMA_2) {
- if (!(reg54 & v_flag)) {
- pci_write_config_word(dev, 0x54, reg54|v_flag);
- }
- } else {
- pci_write_config_word(dev, 0x54, reg54 & ~v_flag);
- }
- }
- if (speed < XFER_UDMA_0) {
- if (reg48 & u_flag)
- pci_write_config_word(dev, 0x48, reg48 & ~u_flag);
- if (reg4a & a_speed)
- pci_write_config_word(dev, 0x4a, reg4a & ~a_speed);
- if (reg54 & v_flag)
- pci_write_config_word(dev, 0x54, reg54 & ~v_flag);
- if (reg55 & w_flag)
- pci_write_config_byte(dev, 0x55, (byte) reg55 & ~w_flag);
- }
- piix_tune_drive(drive, piix_dma_2_pio(speed));
- #if PIIX_DEBUG_DRIVE_INFO
- printk("%s: %s drive%dn", drive->name, ide_xfer_verbose(speed), drive->dn);
- #endif /* PIIX_DEBUG_DRIVE_INFO */
- if (!drive->init_speed)
- drive->init_speed = speed;
- err = ide_config_drive_speed(drive, speed);
- drive->current_speed = speed;
- return err;
- }
- static int piix_config_drive_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;
- byte speed;
- byte udma_66 = eighty_ninty_three(drive);
- int ultra100 = ((dev->device == PCI_DEVICE_ID_INTEL_82801BA_8) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801BA_9) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801CA_10) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801CA_11) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801DB_11) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801E_11)) ? 1 : 0;
- int ultra66 = ((ultra100) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801AA_1) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82372FB_1)) ? 1 : 0;
- int ultra = ((ultra66) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82371AB) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82443MX_1) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82451NX) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801AB_1)) ? 1 : 0;
- if ((id->dma_ultra & 0x0020) && (udma_66) && (ultra100)) {
- speed = XFER_UDMA_5;
- } else if ((id->dma_ultra & 0x0010) && (ultra)) {
- speed = ((udma_66) && (ultra66)) ? XFER_UDMA_4 : XFER_UDMA_2;
- } else if ((id->dma_ultra & 0x0008) && (ultra)) {
- speed = ((udma_66) && (ultra66)) ? XFER_UDMA_3 : XFER_UDMA_1;
- } else if ((id->dma_ultra & 0x0004) && (ultra)) {
- speed = XFER_UDMA_2;
- } else if ((id->dma_ultra & 0x0002) && (ultra)) {
- speed = XFER_UDMA_1;
- } else if ((id->dma_ultra & 0x0001) && (ultra)) {
- speed = XFER_UDMA_0;
- } else if (id->dma_mword & 0x0004) {
- speed = XFER_MW_DMA_2;
- } else if (id->dma_mword & 0x0002) {
- speed = XFER_MW_DMA_1;
- } else if (id->dma_1word & 0x0004) {
- speed = XFER_SW_DMA_2;
- } else {
- speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 5, NULL);
- }
- (void) piix_tune_chipset(drive, speed);
- return ((int) ((id->dma_ultra >> 11) & 7) ? ide_dma_on :
- ((id->dma_ultra >> 8) & 7) ? ide_dma_on :
- ((id->dma_mword >> 8) & 7) ? ide_dma_on :
- ((id->dma_1word >> 8) & 7) ? ide_dma_on :
- ide_dma_off_quietly);
- }
- static void config_chipset_for_pio (ide_drive_t *drive)
- {
- piix_tune_drive(drive, ide_get_best_pio_mode(drive, 255, 5, NULL));
- }
- static int config_drive_xfer_rate (ide_drive_t *drive)
- {
- struct hd_driveid *id = drive->id;
- ide_dma_action_t dma_func = ide_dma_on;
- if (id && (id->capability & 1) && HWIF(drive)->autodma) {
- /* Consult the list of known "bad" drives */
- if (ide_dmaproc(ide_dma_bad_drive, drive)) {
- dma_func = ide_dma_off;
- goto fast_ata_pio;
- }
- dma_func = ide_dma_off_quietly;
- if (id->field_valid & 4) {
- if (id->dma_ultra & 0x003F) {
- /* Force if Capable UltraDMA */
- dma_func = piix_config_drive_for_dma(drive);
- if ((id->field_valid & 2) &&
- (dma_func != ide_dma_on))
- goto try_dma_modes;
- }
- } else if (id->field_valid & 2) {
- try_dma_modes:
- if ((id->dma_mword & 0x0007) ||
- (id->dma_1word & 0x007)) {
- /* Force if Capable regular DMA modes */
- dma_func = piix_config_drive_for_dma(drive);
- if (dma_func != ide_dma_on)
- goto no_dma_set;
- }
- } else if (ide_dmaproc(ide_dma_good_drive, drive)) {
- if (id->eide_dma_time > 150) {
- goto no_dma_set;
- }
- /* Consult the list of known "good" drives */
- dma_func = piix_config_drive_for_dma(drive);
- if (dma_func != ide_dma_on)
- goto no_dma_set;
- } else {
- goto fast_ata_pio;
- }
- } else if ((id->capability & 8) || (id->field_valid & 2)) {
- fast_ata_pio:
- dma_func = ide_dma_off_quietly;
- no_dma_set:
- config_chipset_for_pio(drive);
- }
- return HWIF(drive)->dmaproc(dma_func, drive);
- }
- static int piix_dmaproc(ide_dma_action_t func, ide_drive_t *drive)
- {
- switch (func) {
- case ide_dma_check:
- return config_drive_xfer_rate(drive);
- default :
- break;
- }
- /* Other cases are done by generic IDE-DMA code. */
- return ide_dmaproc(func, drive);
- }
- #endif /* defined(CONFIG_BLK_DEV_IDEDMA) && (CONFIG_PIIX_TUNING) */
- unsigned int __init pci_init_piix (struct pci_dev *dev, const char *name)
- {
- #if defined(DISPLAY_PIIX_TIMINGS) && defined(CONFIG_PROC_FS)
- if (!piix_proc) {
- piix_proc = 1;
- bmide_dev = dev;
- piix_display_info = &piix_get_info;
- }
- #endif /* DISPLAY_PIIX_TIMINGS && CONFIG_PROC_FS */
- return 0;
- }
- /*
- * Sheesh, someone at Intel needs to go read the ATA-4/5 T13 standards.
- * It does not specify device detection, but channel!!!
- * You determine later if bit 13 of word93 is set...
- */
- unsigned int __init ata66_piix (ide_hwif_t *hwif)
- {
- byte reg54h = 0, reg55h = 0, ata66 = 0;
- byte mask = hwif->channel ? 0xc0 : 0x30;
- pci_read_config_byte(hwif->pci_dev, 0x54, ®54h);
- pci_read_config_byte(hwif->pci_dev, 0x55, ®55h);
- ata66 = (reg54h & mask) ? 1 : 0;
- return ata66;
- }
- void __init ide_init_piix (ide_hwif_t *hwif)
- {
- #ifndef CONFIG_IA64
- if (!hwif->irq)
- hwif->irq = hwif->channel ? 15 : 14;
- #endif /* CONFIG_IA64 */
- if (hwif->pci_dev->device == PCI_DEVICE_ID_INTEL_82371MX) {
- /* This is a painful system best to let it self tune for now */
- return;
- }
- hwif->tuneproc = &piix_tune_drive;
- hwif->drives[0].autotune = 1;
- hwif->drives[1].autotune = 1;
- if (!hwif->dma_base)
- return;
- #ifndef CONFIG_BLK_DEV_IDEDMA
- hwif->autodma = 0;
- #else /* CONFIG_BLK_DEV_IDEDMA */
- #ifdef CONFIG_PIIX_TUNING
- if (!noautodma)
- hwif->autodma = 1;
- hwif->dmaproc = &piix_dmaproc;
- hwif->speedproc = &piix_tune_chipset;
- #endif /* CONFIG_PIIX_TUNING */
- #endif /* !CONFIG_BLK_DEV_IDEDMA */
- }