Return to lm32_juart.c CVS log

Up to [Qemu by Fabrice Bellard] / qemu / hw

Annotation of qemu/hw/lm32_juart.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  LatticeMico32 JTAG UART model.
        !             3:  *
        !             4:  *  Copyright (c) 2010 Michael Walle <[email protected]>
        !             5:  *
        !             6:  * This library is free software; you can redistribute it and/or
        !             7:  * modify it under the terms of the GNU Lesser General Public
        !             8:  * License as published by the Free Software Foundation; either
        !             9:  * version 2 of the License, or (at your option) any later version.
        !            10:  *
        !            11:  * This library is distributed in the hope that it will be useful,
        !            12:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14:  * Lesser General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU Lesser General Public
        !            17:  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
        !            18:  */
        !            19: 
        !            20: #include "hw.h"
        !            21: #include "sysbus.h"
        !            22: #include "trace.h"
        !            23: #include "qemu-char.h"
        !            24: 
        !            25: #include "lm32_juart.h"
        !            26: 
        !            27: enum {
        !            28:     LM32_JUART_MIN_SAVE_VERSION = 0,
        !            29:     LM32_JUART_CURRENT_SAVE_VERSION = 0,
        !            30:     LM32_JUART_MAX_SAVE_VERSION = 0,
        !            31: };
        !            32: 
        !            33: enum {
        !            34:     JTX_FULL = (1<<8),
        !            35: };
        !            36: 
        !            37: enum {
        !            38:     JRX_FULL = (1<<8),
        !            39: };
        !            40: 
        !            41: struct LM32JuartState {
        !            42:     SysBusDevice busdev;
        !            43:     CharDriverState *chr;
        !            44: 
        !            45:     uint32_t jtx;
        !            46:     uint32_t jrx;
        !            47: };
        !            48: typedef struct LM32JuartState LM32JuartState;
        !            49: 
        !            50: uint32_t lm32_juart_get_jtx(DeviceState *d)
        !            51: {
        !            52:     LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
        !            53: 
        !            54:     trace_lm32_juart_get_jtx(s->jtx);
        !            55:     return s->jtx;
        !            56: }
        !            57: 
        !            58: uint32_t lm32_juart_get_jrx(DeviceState *d)
        !            59: {
        !            60:     LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
        !            61: 
        !            62:     trace_lm32_juart_get_jrx(s->jrx);
        !            63:     return s->jrx;
        !            64: }
        !            65: 
        !            66: void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx)
        !            67: {
        !            68:     LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
        !            69:     unsigned char ch = jtx & 0xff;
        !            70: 
        !            71:     trace_lm32_juart_set_jtx(s->jtx);
        !            72: 
        !            73:     s->jtx = jtx;
        !            74:     if (s->chr) {
        !            75:         qemu_chr_write(s->chr, &ch, 1);
        !            76:     }
        !            77: }
        !            78: 
        !            79: void lm32_juart_set_jrx(DeviceState *d, uint32_t jtx)
        !            80: {
        !            81:     LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
        !            82: 
        !            83:     trace_lm32_juart_set_jrx(s->jrx);
        !            84:     s->jrx &= ~JRX_FULL;
        !            85: }
        !            86: 
        !            87: static void juart_rx(void *opaque, const uint8_t *buf, int size)
        !            88: {
        !            89:     LM32JuartState *s = opaque;
        !            90: 
        !            91:     s->jrx = *buf | JRX_FULL;
        !            92: }
        !            93: 
        !            94: static int juart_can_rx(void *opaque)
        !            95: {
        !            96:     LM32JuartState *s = opaque;
        !            97: 
        !            98:     return !(s->jrx & JRX_FULL);
        !            99: }
        !           100: 
        !           101: static void juart_event(void *opaque, int event)
        !           102: {
        !           103: }
        !           104: 
        !           105: static void juart_reset(DeviceState *d)
        !           106: {
        !           107:     LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
        !           108: 
        !           109:     s->jtx = 0;
        !           110:     s->jrx = 0;
        !           111: }
        !           112: 
        !           113: static int lm32_juart_init(SysBusDevice *dev)
        !           114: {
        !           115:     LM32JuartState *s = FROM_SYSBUS(typeof(*s), dev);
        !           116: 
        !           117:     s->chr = qdev_init_chardev(&dev->qdev);
        !           118:     if (s->chr) {
        !           119:         qemu_chr_add_handlers(s->chr, juart_can_rx, juart_rx, juart_event, s);
        !           120:     }
        !           121: 
        !           122:     return 0;
        !           123: }
        !           124: 
        !           125: static const VMStateDescription vmstate_lm32_juart = {
        !           126:     .name = "lm32-juart",
        !           127:     .version_id = 1,
        !           128:     .minimum_version_id = 1,
        !           129:     .minimum_version_id_old = 1,
        !           130:     .fields      = (VMStateField[]) {
        !           131:         VMSTATE_UINT32(jtx, LM32JuartState),
        !           132:         VMSTATE_UINT32(jrx, LM32JuartState),
        !           133:         VMSTATE_END_OF_LIST()
        !           134:     }
        !           135: };
        !           136: 
        !           137: static SysBusDeviceInfo lm32_juart_info = {
        !           138:     .init = lm32_juart_init,
        !           139:     .qdev.name  = "lm32-juart",
        !           140:     .qdev.size  = sizeof(LM32JuartState),
        !           141:     .qdev.vmsd  = &vmstate_lm32_juart,
        !           142:     .qdev.reset = juart_reset,
        !           143: };
        !           144: 
        !           145: static void lm32_juart_register(void)
        !           146: {
        !           147:     sysbus_register_withprop(&lm32_juart_info);
        !           148: }
        !           149: 
        !           150: device_init(lm32_juart_register)

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.