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217 lines
5.6 KiB
217 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* ITE 8213 IDE driver |
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* |
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* Copyright (C) 2006 Jack Lee |
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* Copyright (C) 2006 Alan Cox |
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* Copyright (C) 2007 Bartlomiej Zolnierkiewicz |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/types.h> |
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#include <linux/module.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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#define DRV_NAME "it8213" |
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/** |
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* it8213_set_pio_mode - set host controller for PIO mode |
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* @hwif: port |
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* @drive: drive |
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* |
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* Set the interface PIO mode. |
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*/ |
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static void it8213_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
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{ |
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struct pci_dev *dev = to_pci_dev(hwif->dev); |
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int is_slave = drive->dn & 1; |
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int master_port = 0x40; |
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int slave_port = 0x44; |
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unsigned long flags; |
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u16 master_data; |
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u8 slave_data; |
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static DEFINE_SPINLOCK(tune_lock); |
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int control = 0; |
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const u8 pio = drive->pio_mode - XFER_PIO_0; |
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static const u8 timings[][2] = { |
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{ 0, 0 }, |
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{ 0, 0 }, |
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{ 1, 0 }, |
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{ 2, 1 }, |
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{ 2, 3 }, }; |
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spin_lock_irqsave(&tune_lock, flags); |
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pci_read_config_word(dev, master_port, &master_data); |
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if (pio > 1) |
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control |= 1; /* Programmable timing on */ |
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if (drive->media != ide_disk) |
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control |= 4; /* ATAPI */ |
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if (ide_pio_need_iordy(drive, pio)) |
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control |= 2; /* IORDY */ |
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if (is_slave) { |
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master_data |= 0x4000; |
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master_data &= ~0x0070; |
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if (pio > 1) |
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master_data = master_data | (control << 4); |
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pci_read_config_byte(dev, slave_port, &slave_data); |
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slave_data = slave_data & 0xf0; |
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slave_data = slave_data | (timings[pio][0] << 2) | timings[pio][1]; |
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} else { |
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master_data &= ~0x3307; |
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if (pio > 1) |
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master_data = master_data | control; |
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master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8); |
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} |
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pci_write_config_word(dev, master_port, master_data); |
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if (is_slave) |
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pci_write_config_byte(dev, slave_port, slave_data); |
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spin_unlock_irqrestore(&tune_lock, flags); |
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} |
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/** |
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* it8213_set_dma_mode - set host controller for DMA mode |
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* @hwif: port |
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* @drive: drive |
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* |
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* Tune the ITE chipset for the DMA mode. |
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*/ |
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static void it8213_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive) |
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{ |
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struct pci_dev *dev = to_pci_dev(hwif->dev); |
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u8 maslave = 0x40; |
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int a_speed = 3 << (drive->dn * 4); |
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int u_flag = 1 << drive->dn; |
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int v_flag = 0x01 << drive->dn; |
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int w_flag = 0x10 << drive->dn; |
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int u_speed = 0; |
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u16 reg4042, reg4a; |
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u8 reg48, reg54, reg55; |
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const u8 speed = drive->dma_mode; |
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pci_read_config_word(dev, maslave, ®4042); |
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pci_read_config_byte(dev, 0x48, ®48); |
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pci_read_config_word(dev, 0x4a, ®4a); |
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pci_read_config_byte(dev, 0x54, ®54); |
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pci_read_config_byte(dev, 0x55, ®55); |
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if (speed >= XFER_UDMA_0) { |
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u8 udma = speed - XFER_UDMA_0; |
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u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4); |
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if (!(reg48 & u_flag)) |
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pci_write_config_byte(dev, 0x48, reg48 | u_flag); |
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if (speed >= XFER_UDMA_5) |
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pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag); |
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else |
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); |
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if ((reg4a & a_speed) != u_speed) |
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pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed); |
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if (speed > XFER_UDMA_2) { |
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if (!(reg54 & v_flag)) |
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pci_write_config_byte(dev, 0x54, reg54 | v_flag); |
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} else |
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); |
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} else { |
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const u8 mwdma_to_pio[] = { 0, 3, 4 }; |
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if (reg48 & u_flag) |
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pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); |
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if (reg4a & a_speed) |
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pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); |
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if (reg54 & v_flag) |
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pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); |
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if (reg55 & w_flag) |
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pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); |
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if (speed >= XFER_MW_DMA_0) |
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drive->pio_mode = |
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mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0; |
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else |
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drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */ |
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it8213_set_pio_mode(hwif, drive); |
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} |
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} |
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static u8 it8213_cable_detect(ide_hwif_t *hwif) |
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{ |
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struct pci_dev *dev = to_pci_dev(hwif->dev); |
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u8 reg42h = 0; |
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pci_read_config_byte(dev, 0x42, ®42h); |
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return (reg42h & 0x02) ? ATA_CBL_PATA40 : ATA_CBL_PATA80; |
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} |
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static const struct ide_port_ops it8213_port_ops = { |
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.set_pio_mode = it8213_set_pio_mode, |
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.set_dma_mode = it8213_set_dma_mode, |
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.cable_detect = it8213_cable_detect, |
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}; |
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static const struct ide_port_info it8213_chipset = { |
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.name = DRV_NAME, |
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.enablebits = { {0x41, 0x80, 0x80} }, |
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.port_ops = &it8213_port_ops, |
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.host_flags = IDE_HFLAG_SINGLE, |
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.pio_mask = ATA_PIO4, |
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.swdma_mask = ATA_SWDMA2_ONLY, |
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.mwdma_mask = ATA_MWDMA12_ONLY, |
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.udma_mask = ATA_UDMA6, |
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}; |
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/** |
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* it8213_init_one - pci layer discovery entry |
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* @dev: PCI device |
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* @id: ident table entry |
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* |
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* Called by the PCI code when it finds an ITE8213 controller. As |
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* this device follows the standard interfaces we can use the |
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* standard helper functions to do almost all the work for us. |
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*/ |
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static int it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
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{ |
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return ide_pci_init_one(dev, &it8213_chipset, NULL); |
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} |
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static const struct pci_device_id it8213_pci_tbl[] = { |
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{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8213), 0 }, |
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{ 0, }, |
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}; |
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MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); |
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static struct pci_driver it8213_pci_driver = { |
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.name = "ITE8213_IDE", |
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.id_table = it8213_pci_tbl, |
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.probe = it8213_init_one, |
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.remove = ide_pci_remove, |
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.suspend = ide_pci_suspend, |
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.resume = ide_pci_resume, |
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}; |
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static int __init it8213_ide_init(void) |
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{ |
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return ide_pci_register_driver(&it8213_pci_driver); |
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} |
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static void __exit it8213_ide_exit(void) |
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{ |
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pci_unregister_driver(&it8213_pci_driver); |
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} |
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module_init(it8213_ide_init); |
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module_exit(it8213_ide_exit); |
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MODULE_AUTHOR("Jack Lee, Alan Cox"); |
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MODULE_DESCRIPTION("PCI driver module for the ITE 8213"); |
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MODULE_LICENSE("GPL");
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