The FROM_SSI_SLAVE() macro predates QOM and is used as a typesafe way to cast from an SSISlave* to the instance struct of a subtype of TYPE_SSI_SLAVE. Switch to using the QOM cast macros instead, which have the same effect (by writing the QOM macros if the types were previously missing them.) (The FROM_SSI_SLAVE() macro allows the SSISlave member of the subtype's struct to be anywhere as long as it is named "ssidev", whereas a QOM cast macro insists that it is the first thing in the subtype's struct. This is true for all the types we convert here.) This removes all the uses of FROM_SSI_SLAVE() so we can delete the definition. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20200628142429.17111-18-peter.maydell@linaro.org
184 lines
4.4 KiB
C
184 lines
4.4 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 "qemu/osdep.h"
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#include "hw/irq.h"
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#include "hw/ssi/ssi.h"
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#include "migration/vmstate.h"
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#include "qemu/module.h"
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#include "ui/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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#define TYPE_ADS7846 "ads7846"
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#define ADS7846(obj) OBJECT_CHECK(ADS7846State, (obj), TYPE_ADS7846)
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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 = ADS7846(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 = 1,
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.minimum_version_id = 1,
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.post_load = ads7856_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_SSI_SLAVE(ssidev, ADS7846State),
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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 void ads7846_realize(SSISlave *d, Error **errp)
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{
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DeviceState *dev = DEVICE(d);
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ADS7846State *s = ADS7846(d);
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qdev_init_gpio_out(dev, &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, VMSTATE_INSTANCE_ID_ANY, &vmstate_ads7846, s);
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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->realize = ads7846_realize;
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k->transfer = ads7846_transfer;
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}
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static const TypeInfo ads7846_info = {
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.name = TYPE_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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