/* * * BRIEF MODULE DESCRIPTION * IT8172 IDE controller support * * Copyright 2000 MontaVista Software Inc. * Author: MontaVista Software, Inc. * stevel@mvista.com or source@mvista.com * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include "ide_modes.h" /* * Prototypes */ static void it8172_tune_drive (ide_drive_t *drive, byte pio); #if defined(CONFIG_BLK_DEV_IDEDMA) && defined(CONFIG_IT8172_TUNING) static byte it8172_dma_2_pio (byte xfer_rate); static int it8172_tune_chipset (ide_drive_t *drive, byte speed); static int it8172_config_chipset_for_dma (ide_drive_t *drive); static int it8172_dmaproc(ide_dma_action_t func, ide_drive_t *drive); #endif unsigned int __init pci_init_it8172 (struct pci_dev *dev, const char *name); void __init ide_init_it8172 (ide_hwif_t *hwif); static void it8172_tune_drive (ide_drive_t *drive, byte pio) { unsigned long flags; u16 drive_enables; u32 drive_timing; int is_slave = (&HWIF(drive)->drives[1] == drive); pio = ide_get_best_pio_mode(drive, pio, 4, NULL); pci_read_config_word(HWIF(drive)->pci_dev, 0x40, &drive_enables); pci_read_config_dword(HWIF(drive)->pci_dev, 0x44, &drive_timing); /* * FIX! The DIOR/DIOW pulse width and recovery times in port 0x44 * are being left at the default values of 8 PCI clocks (242 nsec * for a 33 MHz clock). These can be safely shortened at higher * PIO modes. The DIOR/DIOW pulse width and recovery times only * apply to PIO modes, not to the DMA modes. */ /* * Enable port 0x44. The IT8172G spec is confused; it calls * this register the "Slave IDE Timing Register", but in fact, * it controls timing for both master and slave drives. */ drive_enables |= 0x4000; if (is_slave) { drive_enables &= 0xc006; if (pio > 1) /* enable prefetch and IORDY sample-point */ drive_enables |= 0x0060; } else { drive_enables &= 0xc060; if (pio > 1) /* enable prefetch and IORDY sample-point */ drive_enables |= 0x0006; } save_flags(flags); cli(); pci_write_config_word(HWIF(drive)->pci_dev, 0x40, drive_enables); restore_flags(flags); } #if defined(CONFIG_BLK_DEV_IDEDMA) && defined(CONFIG_IT8172_TUNING) /* * */ static byte it8172_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; } } static int it8172_tune_chipset (ide_drive_t *drive, byte speed) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_dev; int a_speed = 3 << (drive->dn * 4); int u_flag = 1 << drive->dn; int u_speed = 0; int err = 0; byte reg48, reg4a; pci_read_config_byte(dev, 0x48, ®48); pci_read_config_byte(dev, 0x4a, ®4a); /* * Setting the DMA cycle time to 2 or 3 PCI clocks (60 and 91 nsec * at 33 MHz PCI clock) seems to cause BadCRC errors during DMA * transfers on some drives, even though both numbers meet the minimum * ATAPI-4 spec of 73 and 54 nsec for UDMA 1 and 2 respectively. * So the faster times are just commented out here. The good news is * that the slower cycle time has very little affect on transfer * performance. */ 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_MW_DMA_0: case XFER_SW_DMA_2: break; default: return -1; } if (speed >= XFER_UDMA_0) { pci_write_config_byte(dev, 0x48, reg48 | u_flag); reg4a &= ~a_speed; pci_write_config_byte(dev, 0x4a, reg4a | u_speed); } else { pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); pci_write_config_byte(dev, 0x4a, reg4a & ~a_speed); } it8172_tune_drive(drive, it8172_dma_2_pio(speed)); if (!drive->init_speed) drive->init_speed = speed; err = ide_config_drive_speed(drive, speed); drive->current_speed = speed; return err; } static int it8172_config_chipset_for_dma (ide_drive_t *drive) { struct hd_driveid *id = drive->id; byte speed; if (id->dma_ultra & 0x0010) { speed = XFER_UDMA_2; } else if (id->dma_ultra & 0x0008) { speed = XFER_UDMA_1; } else if (id->dma_ultra & 0x0004) { speed = XFER_UDMA_2; } else if (id->dma_ultra & 0x0002) { speed = XFER_UDMA_1; } else if (id->dma_ultra & 0x0001) { 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_mword & 0x0001) { speed = XFER_MW_DMA_0; } else if (id->dma_1word & 0x0004) { speed = XFER_SW_DMA_2; } else { speed = XFER_PIO_0 + ide_get_best_pio_mode(drive, 255, 4, NULL); } (void) it8172_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 int it8172_dmaproc(ide_dma_action_t func, ide_drive_t *drive) { switch (func) { case ide_dma_check: return ide_dmaproc((ide_dma_action_t)it8172_config_chipset_for_dma(drive), drive); default : break; } /* Other cases are done by generic IDE-DMA code. */ return ide_dmaproc(func, drive); } #endif /* defined(CONFIG_BLK_DEV_IDEDMA) && (CONFIG_IT8172_TUNING) */ unsigned int __init pci_init_it8172 (struct pci_dev *dev, const char *name) { unsigned char progif; /* * Place both IDE interfaces into PCI "native" mode */ (void)pci_read_config_byte(dev, PCI_CLASS_PROG, &progif); (void)pci_write_config_byte(dev, PCI_CLASS_PROG, progif | 0x05); return IT8172_IDE_IRQ; } void __init ide_init_it8172 (ide_hwif_t *hwif) { struct pci_dev* dev = hwif->pci_dev; unsigned long cmdBase, ctrlBase; hwif->tuneproc = &it8172_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_IT8172_TUNING hwif->autodma = 1; hwif->dmaproc = &it8172_dmaproc; hwif->speedproc = &it8172_tune_chipset; #endif /* CONFIG_IT8172_TUNING */ #endif /* !CONFIG_BLK_DEV_IDEDMA */ cmdBase = dev->resource[0].start; ctrlBase = dev->resource[1].start; ide_init_hwif_ports(&hwif->hw, cmdBase, ctrlBase | 2, NULL); memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->io_ports)); hwif->noprobe = 0; }