diff options
Diffstat (limited to 'qemu/roms/seabios/src/serial.c')
| -rw-r--r-- | qemu/roms/seabios/src/serial.c | 317 |
1 files changed, 0 insertions, 317 deletions
diff --git a/qemu/roms/seabios/src/serial.c b/qemu/roms/seabios/src/serial.c deleted file mode 100644 index 88349c8a9..000000000 --- a/qemu/roms/seabios/src/serial.c +++ /dev/null @@ -1,317 +0,0 @@ -// 16bit code to handle serial and printer services. -// -// Copyright (C) 2008,2009 Kevin O'Connor <kevin@koconnor.net> -// Copyright (C) 2002 MandrakeSoft S.A. -// -// This file may be distributed under the terms of the GNU LGPLv3 license. - -#include "biosvar.h" // SET_BDA -#include "bregs.h" // struct bregs -#include "hw/serialio.h" // SEROFF_IER -#include "output.h" // debug_enter -#include "romfile.h" // romfile_loadint -#include "stacks.h" // yield -#include "util.h" // serial_setup - - -/**************************************************************** - * COM ports - ****************************************************************/ - -static u16 -detect_serial(u16 port, u8 timeout, u8 count) -{ - if (CONFIG_DEBUG_SERIAL && port == CONFIG_DEBUG_SERIAL_PORT - && !romfile_loadint("etc/advertise-serial-debug-port", 1)) - return 0; - outb(0x02, port+SEROFF_IER); - u8 ier = inb(port+SEROFF_IER); - if (ier != 0x02) - return 0; - u8 iir = inb(port+SEROFF_IIR); - if ((iir & 0x3f) != 0x02) - return 0; - - outb(0x00, port+SEROFF_IER); - SET_BDA(port_com[count], port); - SET_BDA(com_timeout[count], timeout); - return 1; -} - -void -serial_setup(void) -{ - if (! CONFIG_SERIAL) - return; - dprintf(3, "init serial\n"); - - u16 count = 0; - count += detect_serial(PORT_SERIAL1, 0x0a, count); - count += detect_serial(PORT_SERIAL2, 0x0a, count); - count += detect_serial(PORT_SERIAL3, 0x0a, count); - count += detect_serial(PORT_SERIAL4, 0x0a, count); - dprintf(1, "Found %d serial ports\n", count); - - // Equipment word bits 9..11 determing # serial ports - set_equipment_flags(0xe00, count << 9); -} - -static u16 -getComAddr(struct bregs *regs) -{ - if (regs->dx >= 4) { - set_invalid(regs); - return 0; - } - u16 addr = GET_BDA(port_com[regs->dx]); - if (! addr) - set_invalid(regs); - return addr; -} - -// SERIAL - INITIALIZE PORT -static void -handle_1400(struct bregs *regs) -{ - u16 addr = getComAddr(regs); - if (!addr) - return; - outb(inb(addr+SEROFF_LCR) | 0x80, addr+SEROFF_LCR); - if ((regs->al & 0xE0) == 0) { - outb(0x17, addr+SEROFF_DLL); - outb(0x04, addr+SEROFF_DLH); - } else { - u16 val16 = 0x600 >> ((regs->al & 0xE0) >> 5); - outb(val16 & 0xFF, addr+SEROFF_DLL); - outb(val16 >> 8, addr+SEROFF_DLH); - } - outb(regs->al & 0x1F, addr+SEROFF_LCR); - regs->ah = inb(addr+SEROFF_LSR); - regs->al = inb(addr+SEROFF_MSR); - set_success(regs); -} - -// SERIAL - WRITE CHARACTER TO PORT -static void -handle_1401(struct bregs *regs) -{ - u16 addr = getComAddr(regs); - if (!addr) - return; - u32 end = irqtimer_calc_ticks(GET_BDA(com_timeout[regs->dx])); - for (;;) { - u8 lsr = inb(addr+SEROFF_LSR); - if ((lsr & 0x60) == 0x60) { - // Success - can write data - outb(regs->al, addr+SEROFF_DATA); - // XXX - reread lsr? - regs->ah = lsr; - break; - } - if (irqtimer_check(end)) { - // Timed out - can't write data. - regs->ah = lsr | 0x80; - break; - } - yield(); - } - set_success(regs); -} - -// SERIAL - READ CHARACTER FROM PORT -static void -handle_1402(struct bregs *regs) -{ - u16 addr = getComAddr(regs); - if (!addr) - return; - u32 end = irqtimer_calc_ticks(GET_BDA(com_timeout[regs->dx])); - for (;;) { - u8 lsr = inb(addr+SEROFF_LSR); - if (lsr & 0x01) { - // Success - can read data - regs->al = inb(addr+SEROFF_DATA); - regs->ah = lsr; - break; - } - if (irqtimer_check(end)) { - // Timed out - can't read data. - regs->ah = lsr | 0x80; - break; - } - yield(); - } - set_success(regs); -} - -// SERIAL - GET PORT STATUS -static void -handle_1403(struct bregs *regs) -{ - u16 addr = getComAddr(regs); - if (!addr) - return; - regs->ah = inb(addr+SEROFF_LSR); - regs->al = inb(addr+SEROFF_MSR); - set_success(regs); -} - -static void -handle_14XX(struct bregs *regs) -{ - set_unimplemented(regs); -} - -// INT 14h Serial Communications Service Entry Point -void VISIBLE16 -handle_14(struct bregs *regs) -{ - debug_enter(regs, DEBUG_HDL_14); - if (! CONFIG_SERIAL) { - handle_14XX(regs); - return; - } - - switch (regs->ah) { - case 0x00: handle_1400(regs); break; - case 0x01: handle_1401(regs); break; - case 0x02: handle_1402(regs); break; - case 0x03: handle_1403(regs); break; - default: handle_14XX(regs); break; - } -} - - -/**************************************************************** - * LPT ports - ****************************************************************/ - -static u16 -detect_parport(u16 port, u8 timeout, u8 count) -{ - // clear input mode - outb(inb(port+2) & 0xdf, port+2); - - outb(0xaa, port); - if (inb(port) != 0xaa) - // Not present - return 0; - SET_BDA(port_lpt[count], port); - SET_BDA(lpt_timeout[count], timeout); - return 1; -} - -void -lpt_setup(void) -{ - if (! CONFIG_LPT) - return; - dprintf(3, "init lpt\n"); - - u16 count = 0; - count += detect_parport(PORT_LPT1, 0x14, count); - count += detect_parport(PORT_LPT2, 0x14, count); - dprintf(1, "Found %d lpt ports\n", count); - - // Equipment word bits 14..15 determing # parallel ports - set_equipment_flags(0xc000, count << 14); -} - -static u16 -getLptAddr(struct bregs *regs) -{ - if (regs->dx >= 3) { - set_invalid(regs); - return 0; - } - u16 addr = GET_BDA(port_lpt[regs->dx]); - if (! addr) - set_invalid(regs); - return addr; -} - -// INT 17 - PRINTER - WRITE CHARACTER -static void -handle_1700(struct bregs *regs) -{ - u16 addr = getLptAddr(regs); - if (!addr) - return; - - u32 end = irqtimer_calc_ticks(GET_BDA(lpt_timeout[regs->dx])); - - outb(regs->al, addr); - u8 val8 = inb(addr+2); - outb(val8 | 0x01, addr+2); // send strobe - udelay(5); - outb(val8 & ~0x01, addr+2); - - for (;;) { - u8 v = inb(addr+1); - if (!(v & 0x40)) { - // Success - regs->ah = v ^ 0x48; - break; - } - if (irqtimer_check(end)) { - // Timeout - regs->ah = (v ^ 0x48) | 0x01; - break; - } - yield(); - } - - set_success(regs); -} - -// INT 17 - PRINTER - INITIALIZE PORT -static void -handle_1701(struct bregs *regs) -{ - u16 addr = getLptAddr(regs); - if (!addr) - return; - - u8 val8 = inb(addr+2); - outb(val8 & ~0x04, addr+2); // send init - udelay(5); - outb(val8 | 0x04, addr+2); - - regs->ah = inb(addr+1) ^ 0x48; - set_success(regs); -} - -// INT 17 - PRINTER - GET STATUS -static void -handle_1702(struct bregs *regs) -{ - u16 addr = getLptAddr(regs); - if (!addr) - return; - regs->ah = inb(addr+1) ^ 0x48; - set_success(regs); -} - -static void -handle_17XX(struct bregs *regs) -{ - set_unimplemented(regs); -} - -// INT17h : Printer Service Entry Point -void VISIBLE16 -handle_17(struct bregs *regs) -{ - debug_enter(regs, DEBUG_HDL_17); - if (! CONFIG_LPT) { - handle_17XX(regs); - return; - } - - switch (regs->ah) { - case 0x00: handle_1700(regs); break; - case 0x01: handle_1701(regs); break; - case 0x02: handle_1702(regs); break; - default: handle_17XX(regs); break; - } -} |