diff options
Diffstat (limited to 'drivers/ide/atiixp.c')
| -rw-r--r-- | drivers/ide/atiixp.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/drivers/ide/atiixp.c b/drivers/ide/atiixp.c new file mode 100644 index 000000000..e08b0aac0 --- /dev/null +++ b/drivers/ide/atiixp.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2003 ATI Inc. <hyu@ati.com> + * Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz + */ + +#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 "atiixp" + +#define ATIIXP_IDE_PIO_TIMING 0x40 +#define ATIIXP_IDE_MDMA_TIMING 0x44 +#define ATIIXP_IDE_PIO_CONTROL 0x48 +#define ATIIXP_IDE_PIO_MODE 0x4a +#define ATIIXP_IDE_UDMA_CONTROL 0x54 +#define ATIIXP_IDE_UDMA_MODE 0x56 + +struct atiixp_ide_timing { + u8 command_width; + u8 recover_width; +}; + +static struct atiixp_ide_timing pio_timing[] = { + { 0x05, 0x0d }, + { 0x04, 0x07 }, + { 0x03, 0x04 }, + { 0x02, 0x02 }, + { 0x02, 0x00 }, +}; + +static struct atiixp_ide_timing mdma_timing[] = { + { 0x07, 0x07 }, + { 0x02, 0x01 }, + { 0x02, 0x00 }, +}; + +static DEFINE_SPINLOCK(atiixp_lock); + +/** + * atiixp_set_pio_mode - set host controller for PIO mode + * @hwif: port + * @drive: drive + * + * Set the interface PIO mode. + */ + +static void atiixp_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + unsigned long flags; + int timing_shift = (drive->dn ^ 1) * 8; + u32 pio_timing_data; + u16 pio_mode_data; + const u8 pio = drive->pio_mode - XFER_PIO_0; + + spin_lock_irqsave(&atiixp_lock, flags); + + pci_read_config_word(dev, ATIIXP_IDE_PIO_MODE, &pio_mode_data); + pio_mode_data &= ~(0x07 << (drive->dn * 4)); + pio_mode_data |= (pio << (drive->dn * 4)); + pci_write_config_word(dev, ATIIXP_IDE_PIO_MODE, pio_mode_data); + + pci_read_config_dword(dev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data); + pio_timing_data &= ~(0xff << timing_shift); + pio_timing_data |= (pio_timing[pio].recover_width << timing_shift) | + (pio_timing[pio].command_width << (timing_shift + 4)); + pci_write_config_dword(dev, ATIIXP_IDE_PIO_TIMING, pio_timing_data); + + spin_unlock_irqrestore(&atiixp_lock, flags); +} + +/** + * atiixp_set_dma_mode - set host controller for DMA mode + * @hwif: port + * @drive: drive + * + * Set a ATIIXP host controller to the desired DMA mode. This involves + * programming the right timing data into the PCI configuration space. + */ + +static void atiixp_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) +{ + struct pci_dev *dev = to_pci_dev(hwif->dev); + unsigned long flags; + int timing_shift = (drive->dn ^ 1) * 8; + u32 tmp32; + u16 tmp16; + u16 udma_ctl = 0; + const u8 speed = drive->dma_mode; + + spin_lock_irqsave(&atiixp_lock, flags); + + pci_read_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, &udma_ctl); + + if (speed >= XFER_UDMA_0) { + pci_read_config_word(dev, ATIIXP_IDE_UDMA_MODE, &tmp16); + tmp16 &= ~(0x07 << (drive->dn * 4)); + tmp16 |= ((speed & 0x07) << (drive->dn * 4)); + pci_write_config_word(dev, ATIIXP_IDE_UDMA_MODE, tmp16); + + udma_ctl |= (1 << drive->dn); + } else if (speed >= XFER_MW_DMA_0) { + u8 i = speed & 0x03; + + pci_read_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, &tmp32); + tmp32 &= ~(0xff << timing_shift); + tmp32 |= (mdma_timing[i].recover_width << timing_shift) | + (mdma_timing[i].command_width << (timing_shift + 4)); + pci_write_config_dword(dev, ATIIXP_IDE_MDMA_TIMING, tmp32); + + udma_ctl &= ~(1 << drive->dn); + } + + pci_write_config_word(dev, ATIIXP_IDE_UDMA_CONTROL, udma_ctl); + + spin_unlock_irqrestore(&atiixp_lock, flags); +} + +static u8 atiixp_cable_detect(ide_hwif_t *hwif) +{ + struct pci_dev *pdev = to_pci_dev(hwif->dev); + u8 udma_mode = 0, ch = hwif->channel; + + pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode); + + if ((udma_mode & 0x07) >= 0x04 || (udma_mode & 0x70) >= 0x40) + return ATA_CBL_PATA80; + else + return ATA_CBL_PATA40; +} + +static const struct ide_port_ops atiixp_port_ops = { + .set_pio_mode = atiixp_set_pio_mode, + .set_dma_mode = atiixp_set_dma_mode, + .cable_detect = atiixp_cable_detect, +}; + +static const struct ide_port_info atiixp_pci_info[] = { + { /* 0: IXP200/300/400/700 */ + .name = DRV_NAME, + .enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}}, + .port_ops = &atiixp_port_ops, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + }, + { /* 1: IXP600 */ + .name = DRV_NAME, + .enablebits = {{0x48,0x01,0x00}, {0x00,0x00,0x00}}, + .port_ops = &atiixp_port_ops, + .host_flags = IDE_HFLAG_SINGLE, + .pio_mask = ATA_PIO4, + .mwdma_mask = ATA_MWDMA2, + .udma_mask = ATA_UDMA5, + }, +}; + +/** + * atiixp_init_one - called when a ATIIXP is found + * @dev: the atiixp device + * @id: the matching pci id + * + * Called when the PCI registration layer (or the IDE initialization) + * finds a device matching our IDE device tables. + */ + +static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id) +{ + return ide_pci_init_one(dev, &atiixp_pci_info[id->driver_data], NULL); +} + +static const struct pci_device_id atiixp_pci_tbl[] = { + { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), 0 }, + { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), 0 }, + { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), 0 }, + { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), 1 }, + { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), 0 }, + { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), 0 }, + { 0, }, +}; +MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl); + +static struct pci_driver atiixp_pci_driver = { + .name = "ATIIXP_IDE", + .id_table = atiixp_pci_tbl, + .probe = atiixp_init_one, + .remove = ide_pci_remove, + .suspend = ide_pci_suspend, + .resume = ide_pci_resume, +}; + +static int __init atiixp_ide_init(void) +{ + return ide_pci_register_driver(&atiixp_pci_driver); +} + +static void __exit atiixp_ide_exit(void) +{ + pci_unregister_driver(&atiixp_pci_driver); +} + +module_init(atiixp_ide_init); +module_exit(atiixp_ide_exit); + +MODULE_AUTHOR("HUI YU"); +MODULE_DESCRIPTION("PCI driver module for ATI IXP IDE"); +MODULE_LICENSE("GPL"); |