29e744d088
After reworking the code responsible for selecting the best DMA transfer mode it is now possible to add generic ide_tune_dma() helper. Convert some IDE PCI host drivers to use it (the ones left need more work). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
168 lines
4 KiB
C
168 lines
4 KiB
C
/*
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* triflex.c
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*
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* IDE Chipset driver for the Compaq TriFlex IDE controller.
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*
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* Known to work with the Compaq Workstation 5x00 series.
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*
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* Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
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* Author: Torben Mathiasen <torben.mathiasen@hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Loosely based on the piix & svwks drivers.
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*
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* Documentation:
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* Not publically available.
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/blkdev.h>
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#include <linux/hdreg.h>
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#include <linux/pci.h>
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#include <linux/ide.h>
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#include <linux/init.h>
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static int triflex_tune_chipset(ide_drive_t *drive, u8 xferspeed)
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{
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ide_hwif_t *hwif = HWIF(drive);
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struct pci_dev *dev = hwif->pci_dev;
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u8 channel_offset = hwif->channel ? 0x74 : 0x70;
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u16 timing = 0;
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u32 triflex_timings = 0;
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u8 unit = (drive->select.b.unit & 0x01);
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u8 speed = ide_rate_filter(drive, xferspeed);
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pci_read_config_dword(dev, channel_offset, &triflex_timings);
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switch(speed) {
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case XFER_MW_DMA_2:
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timing = 0x0103;
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break;
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case XFER_MW_DMA_1:
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timing = 0x0203;
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break;
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case XFER_MW_DMA_0:
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timing = 0x0808;
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break;
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case XFER_SW_DMA_2:
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case XFER_SW_DMA_1:
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case XFER_SW_DMA_0:
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timing = 0x0f0f;
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break;
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case XFER_PIO_4:
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timing = 0x0202;
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break;
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case XFER_PIO_3:
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timing = 0x0204;
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break;
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case XFER_PIO_2:
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timing = 0x0404;
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break;
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case XFER_PIO_1:
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timing = 0x0508;
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break;
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case XFER_PIO_0:
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timing = 0x0808;
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break;
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default:
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return -1;
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}
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triflex_timings &= ~(0xFFFF << (16 * unit));
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triflex_timings |= (timing << (16 * unit));
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pci_write_config_dword(dev, channel_offset, triflex_timings);
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return (ide_config_drive_speed(drive, speed));
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}
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static void triflex_tune_drive(ide_drive_t *drive, u8 pio)
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{
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int use_pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
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(void) triflex_tune_chipset(drive, (XFER_PIO_0 + use_pio));
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}
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static int triflex_config_drive_xfer_rate(ide_drive_t *drive)
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{
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if (ide_tune_dma(drive))
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return 0;
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triflex_tune_drive(drive, 255);
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return -1;
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}
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static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
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{
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hwif->tuneproc = &triflex_tune_drive;
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hwif->speedproc = &triflex_tune_chipset;
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hwif->atapi_dma = 1;
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hwif->mwdma_mask = 0x07;
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hwif->swdma_mask = 0x07;
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hwif->ide_dma_check = &triflex_config_drive_xfer_rate;
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if (!noautodma)
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hwif->autodma = 1;
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hwif->drives[0].autodma = hwif->autodma;
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hwif->drives[1].autodma = hwif->autodma;
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}
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static ide_pci_device_t triflex_device __devinitdata = {
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.name = "TRIFLEX",
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.init_hwif = init_hwif_triflex,
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.channels = 2,
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.autodma = AUTODMA,
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.enablebits = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
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.bootable = ON_BOARD,
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};
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static int __devinit triflex_init_one(struct pci_dev *dev,
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const struct pci_device_id *id)
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{
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return ide_setup_pci_device(dev, &triflex_device);
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}
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static struct pci_device_id triflex_pci_tbl[] = {
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{ PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
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PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
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{ 0, },
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};
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MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
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static struct pci_driver driver = {
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.name = "TRIFLEX_IDE",
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.id_table = triflex_pci_tbl,
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.probe = triflex_init_one,
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};
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static int __init triflex_ide_init(void)
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{
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return ide_pci_register_driver(&driver);
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}
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module_init(triflex_ide_init);
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MODULE_AUTHOR("Torben Mathiasen");
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MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
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MODULE_LICENSE("GPL");
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