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