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83f7d43a9e
Replace device_init() with generalized type_init(). While at it, unify naming convention: type_init([$prefix_]register_types) Also, type_init() is a function, so add preceding blank line where necessary and don't put a semicolon after the closing brace. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: malc <av1474@comtv.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
177 lines
4.2 KiB
C
177 lines
4.2 KiB
C
/*
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* TI ADS7846 / TSC2046 chip emulation.
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*
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* Copyright (c) 2006 Openedhand Ltd.
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* Written by Andrzej Zaborowski <balrog@zabor.org>
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*
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* This code is licensed under the GNU GPL v2.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "ssi.h"
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#include "console.h"
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typedef struct {
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SSISlave ssidev;
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qemu_irq interrupt;
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int input[8];
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int pressure;
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int noise;
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int cycle;
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int output;
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} ADS7846State;
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/* Control-byte bitfields */
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#define CB_PD0 (1 << 0)
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#define CB_PD1 (1 << 1)
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#define CB_SER (1 << 2)
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#define CB_MODE (1 << 3)
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#define CB_A0 (1 << 4)
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#define CB_A1 (1 << 5)
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#define CB_A2 (1 << 6)
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#define CB_START (1 << 7)
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#define X_AXIS_DMAX 3470
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#define X_AXIS_MIN 290
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#define Y_AXIS_DMAX 3450
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#define Y_AXIS_MIN 200
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#define ADS_VBAT 2000
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#define ADS_VAUX 2000
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#define ADS_TEMP0 2000
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#define ADS_TEMP1 3000
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#define ADS_XPOS(x, y) (X_AXIS_MIN + ((X_AXIS_DMAX * (x)) >> 15))
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#define ADS_YPOS(x, y) (Y_AXIS_MIN + ((Y_AXIS_DMAX * (y)) >> 15))
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#define ADS_Z1POS(x, y) 600
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#define ADS_Z2POS(x, y) (600 + 6000 / ADS_XPOS(x, y))
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static void ads7846_int_update(ADS7846State *s)
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{
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if (s->interrupt)
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qemu_set_irq(s->interrupt, s->pressure == 0);
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}
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static uint32_t ads7846_transfer(SSISlave *dev, uint32_t value)
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{
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ADS7846State *s = FROM_SSI_SLAVE(ADS7846State, dev);
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switch (s->cycle ++) {
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case 0:
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if (!(value & CB_START)) {
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s->cycle = 0;
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break;
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}
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s->output = s->input[(value >> 4) & 7];
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/* Imitate the ADC noise, some drivers expect this. */
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s->noise = (s->noise + 3) & 7;
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switch ((value >> 4) & 7) {
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case 1: s->output += s->noise ^ 2; break;
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case 3: s->output += s->noise ^ 0; break;
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case 4: s->output += s->noise ^ 7; break;
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case 5: s->output += s->noise ^ 5; break;
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}
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if (value & CB_MODE)
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s->output >>= 4; /* 8 bits instead of 12 */
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break;
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case 1:
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s->cycle = 0;
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break;
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}
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return s->output;
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}
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static void ads7846_ts_event(void *opaque,
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int x, int y, int z, int buttons_state)
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{
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ADS7846State *s = opaque;
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if (buttons_state) {
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x = 0x7fff - x;
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s->input[1] = ADS_XPOS(x, y);
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s->input[3] = ADS_Z1POS(x, y);
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s->input[4] = ADS_Z2POS(x, y);
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s->input[5] = ADS_YPOS(x, y);
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}
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if (s->pressure == !buttons_state) {
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s->pressure = !!buttons_state;
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ads7846_int_update(s);
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}
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}
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static int ads7856_post_load(void *opaque, int version_id)
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{
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ADS7846State *s = opaque;
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s->pressure = 0;
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ads7846_int_update(s);
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return 0;
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}
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static const VMStateDescription vmstate_ads7846 = {
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.name = "ads7846",
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.version_id = 0,
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.minimum_version_id = 0,
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.minimum_version_id_old = 0,
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.post_load = ads7856_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_INT32_ARRAY(input, ADS7846State, 8),
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VMSTATE_INT32(noise, ADS7846State),
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VMSTATE_INT32(cycle, ADS7846State),
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VMSTATE_INT32(output, ADS7846State),
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VMSTATE_END_OF_LIST()
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}
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};
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static int ads7846_init(SSISlave *dev)
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{
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ADS7846State *s = FROM_SSI_SLAVE(ADS7846State, dev);
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qdev_init_gpio_out(&dev->qdev, &s->interrupt, 1);
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s->input[0] = ADS_TEMP0; /* TEMP0 */
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s->input[2] = ADS_VBAT; /* VBAT */
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s->input[6] = ADS_VAUX; /* VAUX */
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s->input[7] = ADS_TEMP1; /* TEMP1 */
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/* We want absolute coordinates */
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qemu_add_mouse_event_handler(ads7846_ts_event, s, 1,
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"QEMU ADS7846-driven Touchscreen");
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ads7846_int_update(s);
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vmstate_register(NULL, -1, &vmstate_ads7846, s);
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return 0;
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}
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static void ads7846_class_init(ObjectClass *klass, void *data)
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{
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SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
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k->init = ads7846_init;
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k->transfer = ads7846_transfer;
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}
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static TypeInfo ads7846_info = {
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.name = "ads7846",
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.parent = TYPE_SSI_SLAVE,
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.instance_size = sizeof(ADS7846State),
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.class_init = ads7846_class_init,
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};
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static void ads7846_register_types(void)
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{
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type_register_static(&ads7846_info);
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}
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type_init(ads7846_register_types)
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