litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'arch/mips/lib/strncpy_user.S')

0 files changed, 0 insertions, 0 deletions

#include <linux/types.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/ide.h> #include <linux/bitops.h> static const char *udma_str[] = { "UDMA/16", "UDMA/25", "UDMA/33", "UDMA/44", "UDMA/66", "UDMA/100", "UDMA/133", "UDMA7" }; static const char *mwdma_str[] = { "MWDMA0", "MWDMA1", "MWDMA2", "MWDMA3", "MWDMA4" }; static const char *swdma_str[] = { "SWDMA0", "SWDMA1", "SWDMA2" }; static const char *pio_str[] = { "PIO0", "PIO1", "PIO2", "PIO3", "PIO4", "PIO5", "PIO6" }; /** * ide_xfer_verbose - return IDE mode names * @mode: transfer mode * * Returns a constant string giving the name of the mode * requested. */ const char *ide_xfer_verbose(u8 mode) { const char *s; u8 i = mode & 0xf; if (mode >= XFER_UDMA_0 && mode <= XFER_UDMA_7) s = udma_str[i]; else if (mode >= XFER_MW_DMA_0 && mode <= XFER_MW_DMA_4) s = mwdma_str[i]; else if (mode >= XFER_SW_DMA_0 && mode <= XFER_SW_DMA_2) s = swdma_str[i]; else if (mode >= XFER_PIO_0 && mode <= XFER_PIO_6) s = pio_str[i & 0x7]; else if (mode == XFER_PIO_SLOW) s = "PIO SLOW"; else s = "XFER ERROR"; return s; } EXPORT_SYMBOL(ide_xfer_verbose); /** * ide_get_best_pio_mode - get PIO mode from drive * @drive: drive to consider * @mode_wanted: preferred mode * @max_mode: highest allowed mode * * This routine returns the recommended PIO settings for a given drive, * based on the drive->id information and the ide_pio_blacklist[]. * * Drive PIO mode is auto-selected if 255 is passed as mode_wanted. * This is used by most chipset support modules when "auto-tuning". */ static u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode) { u16 *id = drive->id; int pio_mode = -1, overridden = 0; if (mode_wanted != 255) return min_t(u8, mode_wanted, max_mode); if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0) pio_mode = ide_scan_pio_blacklist((char *)&id[ATA_ID_PROD]); if (pio_mode != -1) { printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name); } else { pio_mode = id[ATA_ID_OLD_PIO_MODES] >> 8; if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */ pio_mode = 2; overridden = 1; } if (id[ATA_ID_FIELD_VALID] & 2) { /* ATA2? */ if (ata_id_is_cfa(id) && (id[ATA_ID_CFA_MODES] & 7)) pio_mode = 4 + min_t(int, 2, id[ATA_ID_CFA_MODES] & 7); else if (ata_id_has_iordy(id)) { if (id[ATA_ID_PIO_MODES] & 7) { overridden = 0; if (id[ATA_ID_PIO_MODES] & 4) pio_mode = 5; else if (id[ATA_ID_PIO_MODES] & 2) pio_mode = 4; else pio_mode = 3; } } } if (overridden) printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n", drive->name); } if (pio_mode > max_mode) pio_mode = max_mode; return pio_mode; } int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio) { /* * IORDY may lead to controller lock up on certain controllers * if the port is not occupied. */ if (pio == 0 && (drive->hwif->port_flags & IDE_PFLAG_PROBING)) return 0; return ata_id_pio_need_iordy(drive->id, pio); } EXPORT_SYMBOL_GPL(ide_pio_need_iordy); int ide_set_pio_mode(ide_drive_t *drive, const u8 mode) { ide_hwif_t *hwif = drive->hwif; const struct ide_port_ops *port_ops = hwif->port_ops; if (hwif->host_flags & IDE_HFLAG_NO_SET_MODE) return 0; if (port_ops == NULL || port_ops->set_pio_mode == NULL) return -1; /* * TODO: temporary hack for some legacy host drivers that didn't * set transfer mode on the device in ->set_pio_mode method... */ if (port_ops->set_dma_mode == NULL) { drive->pio_mode = mode; port_ops->set_pio_mode(hwif, drive); return 0; } if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) { if (ide_config_drive_speed(drive, mode)) return -1; drive->pio_mode = mode; port_ops->set_pio_mode(hwif, drive); return 0; } else { drive->pio_mode = mode; port_ops->set_pio_mode(hwif, drive);


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