/* * 86Box A hypervisor and IBM PC system emulator that specializes in * running old operating systems and software designed for IBM * PC systems and compatibles from 1981 through fairly recent * system designs based on the PCI bus. * * This file is part of the 86Box distribution. * * Emulation of the NatSemi PC87332 Super I/O chip. * * * * Authors: Miran Grca, * * Copyright 2020 Miran Grca. */ #include #include #include #include #include #include <86box/86box.h> #include <86box/io.h> #include <86box/timer.h> #include <86box/device.h> #include <86box/lpt.h> #include <86box/mem.h> #include <86box/nvr.h> #include <86box/pci.h> #include <86box/rom.h> #include <86box/serial.h> #include <86box/hdc.h> #include <86box/hdc_ide.h> #include <86box/fdd.h> #include <86box/fdc.h> #include <86box/sio.h> typedef struct pc87332_t { uint8_t tries; uint8_t has_ide; uint8_t fdc_on; uint8_t regs[15]; int cur_reg; fdc_t *fdc; serial_t *uart[2]; } pc87332_t; static void lpt1_handler(pc87332_t *dev) { int temp; uint16_t lpt_port = LPT1_ADDR; uint8_t lpt_irq = LPT2_IRQ; temp = dev->regs[0x01] & 3; switch (temp) { case 0: lpt_port = LPT1_ADDR; lpt_irq = (dev->regs[0x02] & 0x08) ? LPT1_IRQ : LPT2_IRQ; break; case 1: lpt_port = LPT_MDA_ADDR; lpt_irq = LPT_MDA_IRQ; break; case 2: lpt_port = LPT2_ADDR; lpt_irq = LPT2_IRQ; break; case 3: lpt_port = 0x000; lpt_irq = 0xff; break; default: break; } if (lpt_port) lpt1_init(lpt_port); lpt1_irq(lpt_irq); } static void serial_handler(pc87332_t *dev, int uart) { int temp; temp = (dev->regs[1] >> (2 << uart)) & 3; switch (temp) { case 0: serial_setup(dev->uart[uart], COM1_ADDR, 4); break; case 1: serial_setup(dev->uart[uart], COM2_ADDR, 3); break; case 2: switch ((dev->regs[1] >> 6) & 3) { case 0: serial_setup(dev->uart[uart], COM3_ADDR, COM3_IRQ); break; case 1: serial_setup(dev->uart[uart], 0x338, COM3_IRQ); break; case 2: serial_setup(dev->uart[uart], COM4_ADDR, COM3_IRQ); break; case 3: serial_setup(dev->uart[uart], 0x220, COM3_IRQ); break; default: break; } break; case 3: switch ((dev->regs[1] >> 6) & 3) { case 0: serial_setup(dev->uart[uart], COM4_ADDR, COM4_IRQ); break; case 1: serial_setup(dev->uart[uart], 0x238, COM4_IRQ); break; case 2: serial_setup(dev->uart[uart], 0x2e0, COM4_IRQ); break; case 3: serial_setup(dev->uart[uart], 0x228, COM4_IRQ); break; default: break; } break; default: break; } } static void ide_handler(pc87332_t *dev) { /* TODO: Make an ide_disable(channel) and ide_enable(channel) so we can simplify this. */ if (dev->has_ide == 2) { ide_sec_disable(); ide_set_base(1, (dev->regs[0x00] & 0x80) ? 0x170 : 0x1f0); ide_set_side(1, (dev->regs[0x00] & 0x80) ? 0x376 : 0x3f6); if (dev->regs[0x00] & 0x40) ide_sec_enable(); } else if (dev->has_ide == 1) { ide_pri_disable(); ide_set_base(0, (dev->regs[0x00] & 0x80) ? 0x170 : 0x1f0); ide_set_side(0, (dev->regs[0x00] & 0x80) ? 0x376 : 0x3f6); if (dev->regs[0x00] & 0x40) ide_pri_enable(); } } static void pc87332_write(uint16_t port, uint8_t val, void *priv) { pc87332_t *dev = (pc87332_t *) priv; uint8_t index; uint8_t valxor; index = (port & 1) ? 0 : 1; if (index) { dev->cur_reg = val & 0x1f; dev->tries = 0; return; } else { if (dev->tries) { valxor = val ^ dev->regs[dev->cur_reg]; dev->tries = 0; if ((dev->cur_reg <= 14) && (dev->cur_reg != 8)) dev->regs[dev->cur_reg] = val; else return; } else { dev->tries++; return; } } switch (dev->cur_reg) { case 0: if (valxor & 1) { lpt1_remove(); if ((val & 1) && !(dev->regs[2] & 1)) lpt1_handler(dev); } if (valxor & 2) { serial_remove(dev->uart[0]); if ((val & 2) && !(dev->regs[2] & 1)) serial_handler(dev, 0); } if (valxor & 4) { serial_remove(dev->uart[1]); if ((val & 4) && !(dev->regs[2] & 1)) serial_handler(dev, 1); } if (valxor & 0x28) { fdc_remove(dev->fdc); if ((val & 8) && !(dev->regs[2] & 1)) fdc_set_base(dev->fdc, (val & 0x20) ? FDC_SECONDARY_ADDR : FDC_PRIMARY_ADDR); } if (dev->has_ide && (valxor & 0xc0)) ide_handler(dev); break; case 1: if (valxor & 3) { lpt1_remove(); if ((dev->regs[0] & 1) && !(dev->regs[2] & 1)) lpt1_handler(dev); } if (valxor & 0xcc) { serial_remove(dev->uart[0]); if ((dev->regs[0] & 2) && !(dev->regs[2] & 1)) serial_handler(dev, 0); } if (valxor & 0xf0) { serial_remove(dev->uart[1]); if ((dev->regs[0] & 4) && !(dev->regs[2] & 1)) serial_handler(dev, 1); } break; case 2: if (valxor & 1) { lpt1_remove(); serial_remove(dev->uart[0]); serial_remove(dev->uart[1]); fdc_remove(dev->fdc); if (!(val & 1)) { if (dev->regs[0] & 1) lpt1_handler(dev); if (dev->regs[0] & 2) serial_handler(dev, 0); if (dev->regs[0] & 4) serial_handler(dev, 1); if (dev->regs[0] & 8) fdc_set_base(dev->fdc, (dev->regs[0] & 0x20) ? FDC_SECONDARY_ADDR : FDC_PRIMARY_ADDR); } } if (valxor & 8) { lpt1_remove(); if ((dev->regs[0] & 1) && !(dev->regs[2] & 1)) lpt1_handler(dev); } break; default: break; } } uint8_t pc87332_read(uint16_t port, void *priv) { pc87332_t *dev = (pc87332_t *) priv; uint8_t ret = 0xff; uint8_t index; index = (port & 1) ? 0 : 1; dev->tries = 0; if (index) ret = dev->cur_reg & 0x1f; else { if (dev->cur_reg == 8) ret = 0x10; else if (dev->cur_reg < 14) ret = dev->regs[dev->cur_reg]; } return ret; } void pc87332_reset(pc87332_t *dev) { memset(dev->regs, 0, 15); dev->regs[0x00] = dev->fdc_on ? 0x4f : 0x07; if (dev->has_ide == 2) dev->regs[0x00] |= 0x80; dev->regs[0x01] = 0x10; dev->regs[0x03] = 0x01; dev->regs[0x05] = 0x0D; dev->regs[0x08] = 0x70; /* 0 = 360 rpm @ 500 kbps for 3.5" 1 = Default, 300 rpm @ 500, 300, 250, 1000 kbps for 3.5" */ lpt1_remove(); lpt1_handler(dev); serial_remove(dev->uart[0]); serial_remove(dev->uart[1]); serial_handler(dev, 0); serial_handler(dev, 1); fdc_reset(dev->fdc); if (!dev->fdc_on) fdc_remove(dev->fdc); if (dev->has_ide) ide_handler(dev); } static void pc87332_close(void *priv) { pc87332_t *dev = (pc87332_t *) priv; free(dev); } static void * pc87332_init(const device_t *info) { pc87332_t *dev = (pc87332_t *) malloc(sizeof(pc87332_t)); memset(dev, 0, sizeof(pc87332_t)); 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); dev->has_ide = (info->local >> 8) & 0xff; dev->fdc_on = (info->local >> 16) & 0xff; pc87332_reset(dev); if ((info->local & 0xff) == 0x01) { io_sethandler(0x398, 0x0002, pc87332_read, NULL, NULL, pc87332_write, NULL, NULL, dev); } else { io_sethandler(0x02e, 0x0002, pc87332_read, NULL, NULL, pc87332_write, NULL, NULL, dev); } return dev; } const device_t pc87332_device = { .name = "National Semiconductor PC87332 Super I/O", .internal_name = "pc87332", .flags = 0, .local = 0x00, .init = pc87332_init, .close = pc87332_close, .reset = NULL, { .available = NULL }, .speed_changed = NULL, .force_redraw = NULL, .config = NULL }; const device_t pc87332_398_device = { .name = "National Semiconductor PC87332 Super I/O (Port 398h)", .internal_name = "pc87332_398", .flags = 0, .local = 0x01, .init = pc87332_init, .close = pc87332_close, .reset = NULL, { .available = NULL }, .speed_changed = NULL, .force_redraw = NULL, .config = NULL }; const device_t pc87332_398_ide_device = { .name = "National Semiconductor PC87332 Super I/O (Port 398h) (With IDE)", .internal_name = "pc87332_398_ide", .flags = 0, .local = 0x101, .init = pc87332_init, .close = pc87332_close, .reset = NULL, { .available = NULL }, .speed_changed = NULL, .force_redraw = NULL, .config = NULL }; const device_t pc87332_398_ide_sec_device = { .name = "National Semiconductor PC87332 Super I/O (Port 398h) (With Secondary IDE)", .internal_name = "pc87332_398_ide_sec", .flags = 0, .local = 0x201, .init = pc87332_init, .close = pc87332_close, .reset = NULL, { .available = NULL }, .speed_changed = NULL, .force_redraw = NULL, .config = NULL }; const device_t pc87332_398_ide_fdcon_device = { .name = "National Semiconductor PC87332 Super I/O (Port 398h) (With IDE and FDC on)", .internal_name = "pc87332_398_ide_fdcon", .flags = 0, .local = 0x10101, .init = pc87332_init, .close = pc87332_close, .reset = NULL, { .available = NULL }, .speed_changed = NULL, .force_redraw = NULL, .config = NULL };