--- /dev/null
+/*
+ * Copyright (C) 1996-1998 Linus Torvalds & authors (see below)
+ */
+
+/*
+ * Authors:
+ * Jaromir Koutek <miri@punknet.cz>,
+ * Jan Harkes <jaharkes@cwi.nl>,
+ * Mark Lord <mlord@pobox.com>
+ * Some parts of code are from ali14xx.c and from rz1000.c.
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+
+#include <asm/io.h>
+
+#define DRV_NAME "opti621"
+
+#define READ_REG 0 /* index of Read cycle timing register */
+#define WRITE_REG 1 /* index of Write cycle timing register */
+#define CNTRL_REG 3 /* index of Control register */
+#define STRAP_REG 5 /* index of Strap register */
+#define MISC_REG 6 /* index of Miscellaneous register */
+
+static int reg_base;
+
+static DEFINE_SPINLOCK(opti621_lock);
+
+/* Write value to register reg, base of register
+ * is at reg_base (0x1f0 primary, 0x170 secondary,
+ * if not changed by PCI configuration).
+ * This is from setupvic.exe program.
+ */
+static void write_reg(u8 value, int reg)
+{
+ inw(reg_base + 1);
+ inw(reg_base + 1);
+ outb(3, reg_base + 2);
+ outb(value, reg_base + reg);
+ outb(0x83, reg_base + 2);
+}
+
+/* Read value from register reg, base of register
+ * is at reg_base (0x1f0 primary, 0x170 secondary,
+ * if not changed by PCI configuration).
+ * This is from setupvic.exe program.
+ */
+static u8 read_reg(int reg)
+{
+ u8 ret = 0;
+
+ inw(reg_base + 1);
+ inw(reg_base + 1);
+ outb(3, reg_base + 2);
+ ret = inb(reg_base + reg);
+ outb(0x83, reg_base + 2);
+
+ return ret;
+}
+
+static void opti621_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
+{
+ ide_drive_t *pair = ide_get_pair_dev(drive);
+ unsigned long flags;
+ unsigned long mode = drive->pio_mode, pair_mode;
+ const u8 pio = mode - XFER_PIO_0;
+ u8 tim, misc, addr_pio = pio, clk;
+
+ /* DRDY is default 2 (by OPTi Databook) */
+ static const u8 addr_timings[2][5] = {
+ { 0x20, 0x10, 0x00, 0x00, 0x00 }, /* 33 MHz */
+ { 0x10, 0x10, 0x00, 0x00, 0x00 }, /* 25 MHz */
+ };
+ static const u8 data_rec_timings[2][5] = {
+ { 0x5b, 0x45, 0x32, 0x21, 0x20 }, /* 33 MHz */
+ { 0x48, 0x34, 0x21, 0x10, 0x10 } /* 25 MHz */
+ };
+
+ ide_set_drivedata(drive, (void *)mode);
+
+ if (pair) {
+ pair_mode = (unsigned long)ide_get_drivedata(pair);
+ if (pair_mode && pair_mode < mode)
+ addr_pio = pair_mode - XFER_PIO_0;
+ }
+
+ spin_lock_irqsave(&opti621_lock, flags);
+
+ reg_base = hwif->io_ports.data_addr;
+
+ /* allow Register-B */
+ outb(0xc0, reg_base + CNTRL_REG);
+ /* hmm, setupvic.exe does this ;-) */
+ outb(0xff, reg_base + 5);
+ /* if reads 0xff, adapter not exist? */
+ (void)inb(reg_base + CNTRL_REG);
+ /* if reads 0xc0, no interface exist? */
+ read_reg(CNTRL_REG);
+
+ /* check CLK speed */
+ clk = read_reg(STRAP_REG) & 1;
+
+ printk(KERN_INFO "%s: CLK = %d MHz\n", hwif->name, clk ? 25 : 33);
+
+ tim = data_rec_timings[clk][pio];
+ misc = addr_timings[clk][addr_pio];
+
+ /* select Index-0/1 for Register-A/B */
+ write_reg(drive->dn & 1, MISC_REG);
+ /* set read cycle timings */
+ write_reg(tim, READ_REG);
+ /* set write cycle timings */
+ write_reg(tim, WRITE_REG);
+
+ /* use Register-A for drive 0 */
+ /* use Register-B for drive 1 */
+ write_reg(0x85, CNTRL_REG);
+
+ /* set address setup, DRDY timings, */
+ /* and read prefetch for both drives */
+ write_reg(misc, MISC_REG);
+
+ spin_unlock_irqrestore(&opti621_lock, flags);
+}
+
+static const struct ide_port_ops opti621_port_ops = {
+ .set_pio_mode = opti621_set_pio_mode,
+};
+
+static const struct ide_port_info opti621_chipset = {
+ .name = DRV_NAME,
+ .enablebits = { {0x45, 0x80, 0x00}, {0x40, 0x08, 0x00} },
+ .port_ops = &opti621_port_ops,
+ .host_flags = IDE_HFLAG_NO_DMA,
+ .pio_mask = ATA_PIO4,
+};
+
+static int opti621_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ return ide_pci_init_one(dev, &opti621_chipset, NULL);
+}
+
+static const struct pci_device_id opti621_pci_tbl[] = {
+ { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C621), 0 },
+ { PCI_VDEVICE(OPTI, PCI_DEVICE_ID_OPTI_82C825), 0 },
+ { 0, },
+};
+MODULE_DEVICE_TABLE(pci, opti621_pci_tbl);
+
+static struct pci_driver opti621_pci_driver = {
+ .name = "Opti621_IDE",
+ .id_table = opti621_pci_tbl,
+ .probe = opti621_init_one,
+ .remove = ide_pci_remove,
+ .suspend = ide_pci_suspend,
+ .resume = ide_pci_resume,
+};
+
+static int __init opti621_ide_init(void)
+{
+ return ide_pci_register_driver(&opti621_pci_driver);
+}
+
+static void __exit opti621_ide_exit(void)
+{
+ pci_unregister_driver(&opti621_pci_driver);
+}
+
+module_init(opti621_ide_init);
+module_exit(opti621_ide_exit);
+
+MODULE_AUTHOR("Jaromir Koutek, Jan Harkes, Mark Lord");
+MODULE_DESCRIPTION("PCI driver module for Opti621 IDE");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff