648 lines
14 KiB
C
648 lines
14 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Emulation of the NatSemi PC87307 Super I/O chip.
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*
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*
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*
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* Author: Miran Grca, <mgrca8@gmail.com>
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* Copyright 2020 Miran Grca.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <86box/86box.h>
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#include <86box/io.h>
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#include <86box/timer.h>
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#include <86box/device.h>
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#include <86box/lpt.h>
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#include <86box/mem.h>
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#include <86box/nvr.h>
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#include <86box/pci.h>
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#include <86box/rom.h>
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#include <86box/serial.h>
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#include <86box/hdc.h>
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#include <86box/hdc_ide.h>
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#include <86box/fdd.h>
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#include <86box/fdc.h>
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#include <86box/sio.h>
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typedef struct {
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uint8_t id, pm_idx,
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regs[48], ld_regs[256][208],
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pcregs[16], gpio[2][4],
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pm[8];
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uint16_t gpio_base, gpio_base2,
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pm_base;
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int cur_reg;
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fdc_t *fdc;
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serial_t *uart[2];
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} pc87307_t;
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static void fdc_handler(pc87307_t *dev);
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static void lpt1_handler(pc87307_t *dev);
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static void serial_handler(pc87307_t *dev, int uart);
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static void
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pc87307_gpio_write(uint16_t port, uint8_t val, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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uint8_t bank = ((port & 0xfffc) == dev->gpio_base2);
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dev->gpio[bank][port & 3] = val;
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}
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uint8_t
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pc87307_gpio_read(uint16_t port, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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uint8_t pins = 0xff, bank = ((port & 0xfffc) == dev->gpio_base2);
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uint8_t mask, ret = dev->gpio[bank][port & 0x0003];
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switch (port & 0x0003) {
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case 0x0000:
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mask = dev->gpio[bank][0x0001];
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ret = (ret & mask) | (pins & ~mask);
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break;
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}
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return ret;
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}
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static void
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pc87307_gpio_remove(pc87307_t *dev)
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{
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if (dev->gpio_base != 0xffff) {
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io_removehandler(dev->gpio_base, 0x0002,
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pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
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dev->gpio_base = 0xffff;
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}
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if (dev->gpio_base2 != 0xffff) {
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io_removehandler(dev->gpio_base2, 0x0002,
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pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
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dev->gpio_base2 = 0xffff;
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}
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}
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static void
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pc87307_gpio_init(pc87307_t *dev, int bank, uint16_t addr)
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{
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uint16_t *bank_base = bank ? &(dev->gpio_base2) : &(dev->gpio_base);
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*bank_base = addr;
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io_sethandler(*bank_base, 0x0002,
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pc87307_gpio_read, NULL, NULL, pc87307_gpio_write, NULL, NULL, dev);
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}
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static void
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pc87307_pm_write(uint16_t port, uint8_t val, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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if (port & 1)
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dev->pm[dev->pm_idx] = val;
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else {
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dev->pm_idx = val & 0x07;
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switch (dev->pm_idx) {
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case 0x00:
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fdc_handler(dev);
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lpt1_handler(dev);
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serial_handler(dev, 1);
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serial_handler(dev, 0);
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break;
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}
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}
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}
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uint8_t
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pc87307_pm_read(uint16_t port, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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if (port & 1)
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return dev->pm[dev->pm_idx];
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else
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return dev->pm_idx;
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}
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static void
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pc87307_pm_remove(pc87307_t *dev)
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{
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if (dev->pm_base != 0xffff) {
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io_removehandler(dev->pm_base, 0x0008,
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pc87307_pm_read, NULL, NULL, pc87307_pm_write, NULL, NULL, dev);
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dev->pm_base = 0xffff;
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}
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}
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static void
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pc87307_pm_init(pc87307_t *dev, uint16_t addr)
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{
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dev->pm_base = addr;
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io_sethandler(dev->pm_base, 0x0008,
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pc87307_pm_read, NULL, NULL, pc87307_pm_write, NULL, NULL, dev);
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}
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static void
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fdc_handler(pc87307_t *dev)
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{
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uint8_t irq, active;
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uint16_t addr;
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fdc_remove(dev->fdc);
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active = (dev->ld_regs[0x03][0x00] & 0x01) && (dev->pm[0x00] & 0x08);
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addr = ((dev->ld_regs[0x03][0x30] << 8) | dev->ld_regs[0x03][0x31]) - 0x0002;
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irq = (dev->ld_regs[0x03][0x40] & 0x0f);
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if (active && (addr <= 0xfff8)) {
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fdc_set_base(dev->fdc, addr);
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fdc_set_irq(dev->fdc, irq);
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}
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}
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static void
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lpt1_handler(pc87307_t *dev)
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{
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uint8_t irq, active;
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uint16_t addr;
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lpt1_remove();
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active = (dev->ld_regs[0x04][0x00] & 0x01) && (dev->pm[0x00] & 0x10);
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addr = (dev->ld_regs[0x04][0x30] << 8) | dev->ld_regs[0x04][0x31];
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irq = (dev->ld_regs[0x04][0x40] & 0x0f);
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if (active && (addr <= 0xfffc)) {
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lpt1_init(addr);
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lpt1_irq(irq);
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}
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}
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static void
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serial_handler(pc87307_t *dev, int uart)
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{
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uint8_t irq, active;
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uint16_t addr;
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serial_remove(dev->uart[uart]);
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active = (dev->ld_regs[0x06 - uart][0x00] & 0x01) && (dev->pm[0x00] & (1 << (6 - uart)));
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addr = (dev->ld_regs[0x06 - uart][0x30] << 8) | dev->ld_regs[0x06 - uart][0x31];
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irq = (dev->ld_regs[0x06 - uart][0x40] & 0x0f);
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if (active && (addr <= 0xfff8))
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serial_setup(dev->uart[uart], addr, irq);
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}
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static void
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gpio_handler(pc87307_t *dev)
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{
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uint8_t active;
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uint16_t addr;
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pc87307_gpio_remove(dev);
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active = (dev->ld_regs[0x07][0x00] & 0x01);
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addr = (dev->ld_regs[0x07][0x30] << 8) | dev->ld_regs[0x07][0x31];
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if (active)
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pc87307_gpio_init(dev, 0, addr);
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addr = (dev->ld_regs[0x07][0x32] << 8) | dev->ld_regs[0x07][0x33];
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if (active)
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pc87307_gpio_init(dev, 1, addr);
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}
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static void
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pm_handler(pc87307_t *dev)
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{
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uint8_t active;
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uint16_t addr;
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pc87307_pm_remove(dev);
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active = (dev->ld_regs[0x08][0x00] & 0x01);
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addr = (dev->ld_regs[0x08][0x30] << 8) | dev->ld_regs[0x08][0x31];
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if (active)
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pc87307_pm_init(dev, addr);
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}
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static void
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pc87307_write(uint16_t port, uint8_t val, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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uint8_t index;
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index = (port & 1) ? 0 : 1;
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if (index) {
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dev->cur_reg = val;
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return;
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} else {
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switch (dev->cur_reg) {
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case 0x00: case 0x02: case 0x03: case 0x06:
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case 0x07: case 0x21:
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dev->regs[dev->cur_reg] = val;
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break;
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case 0x22:
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dev->regs[dev->cur_reg] = val & 0x7f;
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break;
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case 0x23:
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dev->regs[dev->cur_reg] = val & 0x0f;
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break;
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case 0x24:
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dev->pcregs[dev->regs[0x23]] = val;
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break;
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default:
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if (dev->cur_reg >= 0x30) {
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if ((dev->regs[0x07] != 0x06) || !(dev->regs[0x21] & 0x10))
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val;
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}
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break;
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}
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}
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switch(dev->cur_reg) {
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case 0x30:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0x01;
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switch (dev->regs[0x07]) {
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case 0x03:
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fdc_handler(dev);
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break;
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case 0x04:
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lpt1_handler(dev);
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break;
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case 0x05:
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serial_handler(dev, 1);
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break;
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case 0x06:
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serial_handler(dev, 0);
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break;
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case 0x07:
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gpio_handler(dev);
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break;
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case 0x08:
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pm_handler(dev);
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break;
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}
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break;
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case 0x60: case 0x62:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0x07;
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if ((dev->cur_reg == 0x62) && (dev->regs[0x07] != 0x07))
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break;
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switch (dev->regs[0x07]) {
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case 0x03:
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fdc_handler(dev);
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break;
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case 0x04:
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lpt1_handler(dev);
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break;
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case 0x05:
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serial_handler(dev, 1);
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break;
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case 0x06:
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serial_handler(dev, 0);
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break;
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case 0x07:
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gpio_handler(dev);
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break;
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case 0x08:
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pm_handler(dev);
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break;
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}
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break;
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case 0x61:
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switch (dev->regs[0x07]) {
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case 0x00:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xfb;
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break;
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case 0x03:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = (val & 0xfa) | 0x02;
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fdc_handler(dev);
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break;
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case 0x04:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xfc;
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lpt1_handler(dev);
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break;
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case 0x05:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xf8;
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serial_handler(dev, 1);
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break;
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case 0x06:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xf8;
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serial_handler(dev, 0);
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break;
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case 0x07:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xf8;
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gpio_handler(dev);
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break;
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case 0x08:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xfe;
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pm_handler(dev);
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break;
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}
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break;
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case 0x63:
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if (dev->regs[0x07] == 0x00)
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = (val & 0xfb) | 0x04;
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else if (dev->regs[0x07] == 0x07) {
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xfe;
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gpio_handler(dev);
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}
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break;
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case 0x70:
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case 0x74: case 0x75:
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switch (dev->regs[0x07]) {
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case 0x03:
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fdc_handler(dev);
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break;
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case 0x04:
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lpt1_handler(dev);
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break;
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case 0x05:
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serial_handler(dev, 1);
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break;
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case 0x06:
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serial_handler(dev, 0);
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break;
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case 0x07:
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gpio_handler(dev);
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break;
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case 0x08:
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pm_handler(dev);
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break;
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}
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break;
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case 0xf0:
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switch (dev->regs[0x07]) {
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case 0x00:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xc1;
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break;
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case 0x03:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xe1;
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fdc_update_densel_polarity(dev->fdc, (val & 0x20) ? 1 : 0);
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fdc_update_enh_mode(dev->fdc, (val & 0x40) ? 1 : 0);
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break;
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case 0x04:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0xf3;
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lpt1_handler(dev);
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break;
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case 0x05: case 0x06:
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0x87;
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break;
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}
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break;
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case 0xf1:
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if (dev->regs[0x07] == 0x03)
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dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30] = val & 0x0f;
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break;
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}
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}
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uint8_t
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pc87307_read(uint16_t port, void *priv)
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{
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pc87307_t *dev = (pc87307_t *) priv;
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uint8_t ret = 0xff, index;
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index = (port & 1) ? 0 : 1;
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if (index)
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ret = dev->cur_reg;
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else {
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if (dev->cur_reg >= 0x30)
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ret = dev->ld_regs[dev->regs[0x07]][dev->cur_reg - 0x30];
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else if (dev->cur_reg == 0x24)
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ret = dev->pcregs[dev->regs[0x23]];
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else
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ret = dev->regs[dev->cur_reg];
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}
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return ret;
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}
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void
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pc87307_reset(pc87307_t *dev)
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{
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int i;
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memset(dev->regs, 0x00, 0x30);
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for (i = 0; i < 256; i++)
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memset(dev->ld_regs[i], 0x00, 0xd0);
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memset(dev->pcregs, 0x00, 0x10);
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memset(dev->gpio, 0xff, 0x08);
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memset(dev->pm, 0x00, 0x08);
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dev->regs[0x20] = dev->id;
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dev->regs[0x21] = 0x04;
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dev->ld_regs[0x00][0x01] = 0x01;
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dev->ld_regs[0x00][0x31] = 0x60;
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dev->ld_regs[0x00][0x33] = 0x64;
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dev->ld_regs[0x00][0x40] = 0x01;
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dev->ld_regs[0x00][0x41] = 0x02;
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dev->ld_regs[0x00][0x44] = 0x04;
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dev->ld_regs[0x00][0x45] = 0x04;
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dev->ld_regs[0x00][0xc0] = 0x40;
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dev->ld_regs[0x01][0x40] = 0x0c;
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dev->ld_regs[0x01][0x41] = 0x02;
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dev->ld_regs[0x01][0x44] = 0x04;
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dev->ld_regs[0x01][0x45] = 0x04;
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dev->ld_regs[0x02][0x00] = 0x01;
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dev->ld_regs[0x02][0x31] = 0x70;
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dev->ld_regs[0x02][0x40] = 0x08;
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dev->ld_regs[0x02][0x44] = 0x04;
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dev->ld_regs[0x02][0x45] = 0x04;
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dev->ld_regs[0x03][0x01] = 0x01;
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dev->ld_regs[0x03][0x30] = 0x03;
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dev->ld_regs[0x03][0x31] = 0xf2;
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dev->ld_regs[0x03][0x40] = 0x06;
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dev->ld_regs[0x03][0x41] = 0x03;
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dev->ld_regs[0x03][0x44] = 0x02;
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dev->ld_regs[0x03][0x45] = 0x04;
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dev->ld_regs[0x03][0xc0] = 0x02;
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dev->ld_regs[0x04][0x30] = 0x02;
|
|
dev->ld_regs[0x04][0x31] = 0x78;
|
|
dev->ld_regs[0x04][0x40] = 0x07;
|
|
dev->ld_regs[0x04][0x44] = 0x04;
|
|
dev->ld_regs[0x04][0x45] = 0x04;
|
|
dev->ld_regs[0x04][0xc0] = 0xf2;
|
|
|
|
dev->ld_regs[0x05][0x30] = 0x02;
|
|
dev->ld_regs[0x05][0x31] = 0xf8;
|
|
dev->ld_regs[0x05][0x40] = 0x03;
|
|
dev->ld_regs[0x05][0x41] = 0x03;
|
|
dev->ld_regs[0x05][0x44] = 0x04;
|
|
dev->ld_regs[0x05][0x45] = 0x04;
|
|
dev->ld_regs[0x05][0xc0] = 0x02;
|
|
|
|
dev->ld_regs[0x06][0x30] = 0x03;
|
|
dev->ld_regs[0x06][0x31] = 0xf8;
|
|
dev->ld_regs[0x06][0x40] = 0x04;
|
|
dev->ld_regs[0x06][0x41] = 0x03;
|
|
dev->ld_regs[0x06][0x44] = 0x04;
|
|
dev->ld_regs[0x06][0x45] = 0x04;
|
|
dev->ld_regs[0x06][0xc0] = 0x02;
|
|
|
|
dev->ld_regs[0x07][0x44] = 0x04;
|
|
dev->ld_regs[0x07][0x45] = 0x04;
|
|
|
|
dev->ld_regs[0x08][0x44] = 0x04;
|
|
dev->ld_regs[0x08][0x45] = 0x04;
|
|
|
|
// dev->gpio[0] = 0xff;
|
|
// dev->gpio[1] = 0xfb;
|
|
dev->gpio[0][0] = 0xff;
|
|
dev->gpio[0][1] = 0x00;
|
|
dev->gpio[0][2] = 0x00;
|
|
dev->gpio[0][3] = 0xff;
|
|
dev->gpio[1][0] = 0xff;
|
|
dev->gpio[1][1] = 0x00;
|
|
dev->gpio[1][2] = 0x00;
|
|
dev->gpio[1][3] = 0xff;
|
|
|
|
dev->pm[0] = 0xff;
|
|
dev->pm[1] = 0xff;
|
|
dev->pm[4] = 0x0e;
|
|
dev->pm[7] = 0x01;
|
|
|
|
dev->gpio_base = dev->pm_base = 0xffff;
|
|
|
|
/*
|
|
0 = 360 rpm @ 500 kbps for 3.5"
|
|
1 = Default, 300 rpm @ 500,300,250,1000 kbps for 3.5"
|
|
*/
|
|
lpt1_remove();
|
|
serial_remove(dev->uart[0]);
|
|
serial_remove(dev->uart[1]);
|
|
fdc_reset(dev->fdc);
|
|
}
|
|
|
|
|
|
static void
|
|
pc87307_close(void *priv)
|
|
{
|
|
pc87307_t *dev = (pc87307_t *) priv;
|
|
|
|
free(dev);
|
|
}
|
|
|
|
|
|
static void *
|
|
pc87307_init(const device_t *info)
|
|
{
|
|
pc87307_t *dev = (pc87307_t *) malloc(sizeof(pc87307_t));
|
|
memset(dev, 0, sizeof(pc87307_t));
|
|
|
|
dev->id = info->local & 0xff;
|
|
|
|
dev->fdc = device_add(&fdc_at_nsc_device);
|
|
|
|
dev->uart[0] = device_add_inst(&ns16550_device, 1);
|
|
dev->uart[1] = device_add_inst(&ns16550_device, 2);
|
|
|
|
pc87307_reset(dev);
|
|
|
|
if (info->local & 0x100) {
|
|
io_sethandler(0x02e, 0x0002,
|
|
pc87307_read, NULL, NULL, pc87307_write, NULL, NULL, dev);
|
|
}
|
|
if (info->local & 0x200) {
|
|
io_sethandler(0x15c, 0x0002,
|
|
pc87307_read, NULL, NULL, pc87307_write, NULL, NULL, dev);
|
|
}
|
|
|
|
return dev;
|
|
}
|
|
|
|
const device_t pc87307_device = {
|
|
.name = "National Semiconductor PC87307 Super I/O",
|
|
.internal_name = "pc87307",
|
|
.flags = 0,
|
|
.local = 0x1c0,
|
|
.init = pc87307_init,
|
|
.close = pc87307_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t pc87307_15c_device = {
|
|
.name = "National Semiconductor PC87307 Super I/O (Port 15Ch)",
|
|
.internal_name = "pc87307_15c",
|
|
.flags = 0,
|
|
.local = 0x2c0,
|
|
.init = pc87307_init,
|
|
.close = pc87307_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t pc87307_both_device = {
|
|
.name = "National Semiconductor PC87307 Super I/O (Ports 2Eh and 15Ch)",
|
|
.internal_name = "pc87307_both",
|
|
.flags = 0,
|
|
.local = 0x3c0,
|
|
.init = pc87307_init,
|
|
.close = pc87307_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|
|
|
|
const device_t pc97307_device = {
|
|
.name = "National Semiconductor PC97307 Super I/O",
|
|
.internal_name = "pc97307",
|
|
.flags = 0,
|
|
.local = 0x1cf,
|
|
.init = pc87307_init,
|
|
.close = pc87307_close,
|
|
.reset = NULL,
|
|
{ .available = NULL },
|
|
.speed_changed = NULL,
|
|
.force_redraw = NULL,
|
|
.config = NULL
|
|
};
|