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Linux/drivers/ide/triflex.c

  1 /*
  2  * IDE Chipset driver for the Compaq TriFlex IDE controller.
  3  * 
  4  * Known to work with the Compaq Workstation 5x00 series.
  5  *
  6  * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
  7  * Author: Torben Mathiasen <torben.mathiasen@hp.com>
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License version 2 as
 11  * published by the Free Software Foundation.
 12  *
 13  * This program is distributed in the hope that it will be useful,
 14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  * GNU General Public License for more details.
 17  *
 18  * You should have received a copy of the GNU General Public License
 19  * along with this program; if not, write to the Free Software
 20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 21  * 
 22  * Loosely based on the piix & svwks drivers.
 23  *
 24  * Documentation:
 25  *      Not publicly available.
 26  */
 27 
 28 #include <linux/types.h>
 29 #include <linux/module.h>
 30 #include <linux/kernel.h>
 31 #include <linux/pci.h>
 32 #include <linux/ide.h>
 33 #include <linux/init.h>
 34 
 35 #define DRV_NAME "triflex"
 36 
 37 static void triflex_set_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 38 {
 39         struct pci_dev *dev = to_pci_dev(hwif->dev);
 40         u32 triflex_timings = 0;
 41         u16 timing = 0;
 42         u8 channel_offset = hwif->channel ? 0x74 : 0x70, unit = drive->dn & 1;
 43 
 44         pci_read_config_dword(dev, channel_offset, &triflex_timings);
 45 
 46         switch (drive->dma_mode) {
 47                 case XFER_MW_DMA_2:
 48                         timing = 0x0103; 
 49                         break;
 50                 case XFER_MW_DMA_1:
 51                         timing = 0x0203;
 52                         break;
 53                 case XFER_MW_DMA_0:
 54                         timing = 0x0808;
 55                         break;
 56                 case XFER_SW_DMA_2:
 57                 case XFER_SW_DMA_1:
 58                 case XFER_SW_DMA_0:
 59                         timing = 0x0f0f;
 60                         break;
 61                 case XFER_PIO_4:
 62                         timing = 0x0202;
 63                         break;
 64                 case XFER_PIO_3:
 65                         timing = 0x0204;
 66                         break;
 67                 case XFER_PIO_2:
 68                         timing = 0x0404;
 69                         break;
 70                 case XFER_PIO_1:
 71                         timing = 0x0508;
 72                         break;
 73                 case XFER_PIO_0:
 74                         timing = 0x0808;
 75                         break;
 76         }
 77 
 78         triflex_timings &= ~(0xFFFF << (16 * unit));
 79         triflex_timings |= (timing << (16 * unit));
 80         
 81         pci_write_config_dword(dev, channel_offset, triflex_timings);
 82 }
 83 
 84 static void triflex_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
 85 {
 86         drive->dma_mode = drive->pio_mode;
 87         triflex_set_mode(hwif, drive);
 88 }
 89 
 90 static const struct ide_port_ops triflex_port_ops = {
 91         .set_pio_mode           = triflex_set_pio_mode,
 92         .set_dma_mode           = triflex_set_mode,
 93 };
 94 
 95 static const struct ide_port_info triflex_device = {
 96         .name           = DRV_NAME,
 97         .enablebits     = {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},
 98         .port_ops       = &triflex_port_ops,
 99         .pio_mask       = ATA_PIO4,
100         .swdma_mask     = ATA_SWDMA2,
101         .mwdma_mask     = ATA_MWDMA2,
102 };
103 
104 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
105 {
106         return ide_pci_init_one(dev, &triflex_device, NULL);
107 }
108 
109 static const struct pci_device_id triflex_pci_tbl[] = {
110         { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), 0 },
111         { 0, },
112 };
113 MODULE_DEVICE_TABLE(pci, triflex_pci_tbl);
114 
115 #ifdef CONFIG_PM
116 static int triflex_ide_pci_suspend(struct pci_dev *dev, pm_message_t state)
117 {
118         /*
119          * We must not disable or powerdown the device.
120          * APM bios refuses to suspend if IDE is not accessible.
121          */
122         pci_save_state(dev);
123         return 0;
124 }
125 #else
126 #define triflex_ide_pci_suspend NULL
127 #endif
128 
129 static struct pci_driver triflex_pci_driver = {
130         .name           = "TRIFLEX_IDE",
131         .id_table       = triflex_pci_tbl,
132         .probe          = triflex_init_one,
133         .remove         = ide_pci_remove,
134         .suspend        = triflex_ide_pci_suspend,
135         .resume         = ide_pci_resume,
136 };
137 
138 static int __init triflex_ide_init(void)
139 {
140         return ide_pci_register_driver(&triflex_pci_driver);
141 }
142 
143 static void __exit triflex_ide_exit(void)
144 {
145         pci_unregister_driver(&triflex_pci_driver);
146 }
147 
148 module_init(triflex_ide_init);
149 module_exit(triflex_ide_exit);
150 
151 MODULE_AUTHOR("Torben Mathiasen");
152 MODULE_DESCRIPTION("PCI driver module for Compaq Triflex IDE");
153 MODULE_LICENSE("GPL");
154 
155 
156 

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