-/*
- * Set/get power state for a drive.
- * NOTE: affects both drives on each channel.
- *
- * When we turn the power back on, we need to re-initialize things.
- */
-#define TRISTATE_BIT 0x8000
-
-static int hpt3xx_busproc(ide_drive_t *drive, int state)
-{
- ide_hwif_t *hwif = HWIF(drive);
- struct pci_dev *dev = to_pci_dev(hwif->dev);
- u8 mcr_addr = hwif->select_data + 2;
- u8 resetmask = hwif->channel ? 0x80 : 0x40;
- u8 bsr2 = 0;
- u16 mcr = 0;
-
- hwif->bus_state = state;
-
- /* Grab the status. */
- pci_read_config_word(dev, mcr_addr, &mcr);
- pci_read_config_byte(dev, 0x59, &bsr2);
-
- /*
- * Set the state. We don't set it if we don't need to do so.
- * Make sure that the drive knows that it has failed if it's off.
- */
- switch (state) {
- case BUSSTATE_ON:
- if (!(bsr2 & resetmask))
- return 0;
- hwif->drives[0].failures = hwif->drives[1].failures = 0;
-
- pci_write_config_byte(dev, 0x59, bsr2 & ~resetmask);
- pci_write_config_word(dev, mcr_addr, mcr & ~TRISTATE_BIT);
- return 0;
- case BUSSTATE_OFF:
- if ((bsr2 & resetmask) && !(mcr & TRISTATE_BIT))
- return 0;
- mcr &= ~TRISTATE_BIT;
- break;
- case BUSSTATE_TRISTATE:
- if ((bsr2 & resetmask) && (mcr & TRISTATE_BIT))
- return 0;
- mcr |= TRISTATE_BIT;
- break;
- default:
- return -EINVAL;
- }
-
- hwif->drives[0].failures = hwif->drives[0].max_failures + 1;
- hwif->drives[1].failures = hwif->drives[1].max_failures + 1;
-
- pci_write_config_word(dev, mcr_addr, mcr);
- pci_write_config_byte(dev, 0x59, bsr2 | resetmask);
- return 0;
-}
-