diff options
Diffstat (limited to 'drivers/ide/slc90e66.c')
| -rw-r--r-- | drivers/ide/slc90e66.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/drivers/ide/slc90e66.c b/drivers/ide/slc90e66.c new file mode 100644 index 00000000000..0f759e4ed77 --- /dev/null +++ b/drivers/ide/slc90e66.c @@ -0,0 +1,181 @@ +/* + * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org> + * Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com> + * + * This is a look-alike variation of the ICH0 PIIX4 Ultra-66, + * but this keeps the ISA-Bridge and slots alive. + * + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/ide.h> +#include <linux/init.h> + +#define DRV_NAME "slc90e66" + +static DEFINE_SPINLOCK(slc90e66_lock); + +static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio) +{ + ide_hwif_t *hwif = HWIF(drive); + struct pci_dev *dev = to_pci_dev(hwif->dev); + int is_slave = drive->dn & 1; + int master_port = hwif->channel ? 0x42 : 0x40; + int slave_port = 0x44; + unsigned long flags; + u16 master_data; + u8 slave_data; + int control = 0; + /* ISP RTC */ + static const u8 timings[][2] = { + { 0, 0 }, + { 0, 0 }, + { 1, 0 }, + { 2, 1 }, + { 2, 3 }, }; + + spin_lock_irqsave(&slc90e66_lock, flags); + pci_read_config_word(dev, master_port, &master_data); + + if (pio > 1) + control |= 1; /* Programmable timing on */ + if (drive->media == ide_disk) + control |= 4; /* Prefetch, post write */ + if (pio > 2) + control |= 2; /* IORDY */ + if (is_slave) { + master_data |= 0x4000; + master_data &= ~0x0070; + if (pio > 1) { + /* Set PPE, IE and TIME */ + master_data |= control << 4; + } + pci_read_config_byte(dev, slave_port, &slave_data); + slave_data &= hwif->channel ? 0x0f : 0xf0; + slave_data |= ((timings[pio][0] << 2) | timings[pio][1]) << + (hwif->channel ? 4 : 0); + } else { + master_data &= ~0x3307; + if (pio > 1) { + /* enable PPE, IE and TIME */ + master_data |= control; + } + master_data |= (timings[pio][0] << 12) | (timings[pio][1] << 8); + } + pci_write_config_word(dev, master_port, master_data); + if (is_slave) + pci_write_config_byte(dev, slave_port, slave_data); + spin_unlock_irqrestore(&slc90e66_lock, flags); +} + +static void slc90e66_set_dma_mode(ide_drive_t *drive, const u8 speed) +{ + ide_hwif_t *hwif = HWIF(drive); + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 maslave = hwif->channel ? 0x42 : 0x40; + int sitre = 0, a_speed = 7 << (drive->dn * 4); + int u_speed = 0, u_flag = 1 << drive->dn; + u16 reg4042, reg44, reg48, reg4a; + + pci_read_config_word(dev, maslave, ®4042); + sitre = (reg4042 & 0x4000) ? 1 : 0; + pci_read_config_word(dev, 0x44, ®44); + pci_read_config_word(dev, 0x48, ®48); + pci_read_config_word(dev, 0x4a, ®4a); + + if (speed >= XFER_UDMA_0) { + u_speed = (speed - XFER_UDMA_0) << (drive->dn * 4); + + if (!(reg48 & u_flag)) + pci_write_config_word(dev, 0x48, reg48|u_flag); + /* FIXME: (reg4a & a_speed) ? */ + if ((reg4a & u_speed) != u_speed) { + pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); + pci_read_config_word(dev, 0x4a, ®4a); + pci_write_config_word(dev, 0x4a, reg4a|u_speed); + } + } else { + const u8 mwdma_to_pio[] = { 0, 3, 4 }; + u8 pio; + + if (reg48 & u_flag) + pci_write_config_word(dev, 0x48, reg48 & ~u_flag); + if (reg4a & a_speed) + pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); + + if (speed >= XFER_MW_DMA_0) + pio = mwdma_to_pio[speed - XFER_MW_DMA_0]; + else + pio = 2; /* only SWDMA2 is allowed */ + + slc90e66_set_pio_mode(drive, pio); + } +} + +static u8 slc90e66_cable_detect(ide_hwif_t *hwif) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + u8 reg47 = 0, mask = hwif->channel ? 0x01 : 0x02; + + pci_read_config_byte(dev, 0x47, ®47); + + /* bit[0(1)]: 0:80, 1:40 */ + return (reg47 & mask) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; +} + +static const struct ide_port_ops slc90e66_port_ops = { + .set_pio_mode = slc90e66_set_pio_mode, + .set_dma_mode = slc90e66_set_dma_mode, + .cable_detect = slc90e66_cable_detect, +}; + +static const struct ide_port_info slc90e66_chipset __devinitdata = { + .name = DRV_NAME, + .enablebits = { {0x41, 0x80, 0x80}, {0x43, 0x80, 0x80} }, + .port_ops = &slc90e66_port_ops, + .host_flags = IDE_HFLAG_LEGACY_IRQS, + .pio_mask = ATA_PIO4, + .swdma_mask = ATA_SWDMA2_ONLY, + .mwdma_mask = ATA_MWDMA12_ONLY, + .udma_mask = ATA_UDMA4, +}; + +static int __devinit slc90e66_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + return ide_pci_init_one(dev, &slc90e66_chipset, NULL); +} + +static const struct pci_device_id slc90e66_pci_tbl[] = { + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_SLC90E66_1), 0 }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, slc90e66_pci_tbl); + +static struct pci_driver slc90e66_pci_driver = { + .name = "SLC90e66_IDE", + .id_table = slc90e66_pci_tbl, + .probe = slc90e66_init_one, + .remove = ide_pci_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init slc90e66_ide_init(void) +{ + return ide_pci_register_driver(&slc90e66_pci_driver); +} + +static void __exit slc90e66_ide_exit(void) +{ + pci_unregister_driver(&slc90e66_pci_driver); +} + +module_init(slc90e66_ide_init); +module_exit(slc90e66_ide_exit); + +MODULE_AUTHOR("Andre Hedrick"); +MODULE_DESCRIPTION("PCI driver module for SLC90E66 IDE"); +MODULE_LICENSE("GPL"); |