diff options
Diffstat (limited to 'hw/parallel.c')
| -rw-r--r-- | hw/parallel.c | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/hw/parallel.c b/hw/parallel.c deleted file mode 100644 index cba9561..0000000 --- a/hw/parallel.c +++ /dev/null @@ -1,183 +0,0 @@ -/* - * QEMU Parallel PORT emulation - * - * Copyright (c) 2003-2005 Fabrice Bellard - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ -#include "vl.h" - -//#define DEBUG_PARALLEL - -/* - * These are the definitions for the Printer Status Register - */ -#define PARA_STS_BUSY 0x80 /* Busy complement */ -#define PARA_STS_ACK 0x40 /* Acknowledge */ -#define PARA_STS_PAPER 0x20 /* Out of paper */ -#define PARA_STS_ONLINE 0x10 /* Online */ -#define PARA_STS_ERROR 0x08 /* Error complement */ - -/* - * These are the definitions for the Printer Control Register - */ -#define PARA_CTR_INTEN 0x10 /* IRQ Enable */ -#define PARA_CTR_SELECT 0x08 /* Select In complement */ -#define PARA_CTR_INIT 0x04 /* Initialize Printer complement */ -#define PARA_CTR_AUTOLF 0x02 /* Auto linefeed complement */ -#define PARA_CTR_STROBE 0x01 /* Strobe complement */ - -struct ParallelState { - uint8_t data; - uint8_t status; /* read only register */ - uint8_t control; - int irq; - int irq_pending; - CharDriverState *chr; - int hw_driver; -}; - -static void parallel_update_irq(ParallelState *s) -{ - if (s->irq_pending) - pic_set_irq(s->irq, 1); - else - pic_set_irq(s->irq, 0); -} - -static void parallel_ioport_write(void *opaque, uint32_t addr, uint32_t val) -{ - ParallelState *s = opaque; - - addr &= 7; -#ifdef DEBUG_PARALLEL - printf("parallel: write addr=0x%02x val=0x%02x\n", addr, val); -#endif - switch(addr) { - case 0: - if (s->hw_driver) { - s->data = val; - qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_DATA, &s->data); - } else { - s->data = val; - parallel_update_irq(s); - } - break; - case 2: - if (s->hw_driver) { - s->control = val; - qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &s->control); - } else { - if ((val & PARA_CTR_INIT) == 0 ) { - s->status = PARA_STS_BUSY; - s->status |= PARA_STS_ACK; - s->status |= PARA_STS_ONLINE; - s->status |= PARA_STS_ERROR; - } - else if (val & PARA_CTR_SELECT) { - if (val & PARA_CTR_STROBE) { - s->status &= ~PARA_STS_BUSY; - if ((s->control & PARA_CTR_STROBE) == 0) - qemu_chr_write(s->chr, &s->data, 1); - } else { - if (s->control & PARA_CTR_INTEN) { - s->irq_pending = 1; - } - } - } - parallel_update_irq(s); - s->control = val; - } - break; - } -} - -static uint32_t parallel_ioport_read(void *opaque, uint32_t addr) -{ - ParallelState *s = opaque; - uint32_t ret = 0xff; - - addr &= 7; - switch(addr) { - case 0: - if (s->hw_driver) { - qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_DATA, &s->data); - } - ret = s->data; - break; - case 1: - if (s->hw_driver) { - qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_STATUS, &s->status); - ret = s->status; - } else { - ret = s->status; - s->irq_pending = 0; - if ((s->status & PARA_STS_BUSY) == 0 && (s->control & PARA_CTR_STROBE) == 0) { - /* XXX Fixme: wait 5 microseconds */ - if (s->status & PARA_STS_ACK) - s->status &= ~PARA_STS_ACK; - else { - /* XXX Fixme: wait 5 microseconds */ - s->status |= PARA_STS_ACK; - s->status |= PARA_STS_BUSY; - } - } - parallel_update_irq(s); - } - break; - case 2: - if (s->hw_driver) { - qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_READ_CONTROL, &s->control); - } - ret = s->control; - break; - } -#ifdef DEBUG_PARALLEL - printf("parallel: read addr=0x%02x val=0x%02x\n", addr, ret); -#endif - return ret; -} - -/* If fd is zero, it means that the parallel device uses the console */ -ParallelState *parallel_init(int base, int irq, CharDriverState *chr) -{ - ParallelState *s; - uint8_t dummy; - - s = qemu_mallocz(sizeof(ParallelState)); - if (!s) - return NULL; - s->chr = chr; - s->hw_driver = 0; - if (qemu_chr_ioctl(chr, CHR_IOCTL_PP_READ_STATUS, &dummy) == 0) - s->hw_driver = 1; - - s->irq = irq; - s->data = 0; - s->status = PARA_STS_BUSY; - s->status |= PARA_STS_ACK; - s->status |= PARA_STS_ONLINE; - s->status |= PARA_STS_ERROR; - s->control = PARA_CTR_SELECT; - s->control |= PARA_CTR_INIT; - - register_ioport_write(base, 8, 1, parallel_ioport_write, s); - register_ioport_read(base, 8, 1, parallel_ioport_read, s); - return s; -} |