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The ADS7846 touchscreen controller device was used only by the XScale-based PDA machine types. Now that they have been removed, this device is not used in the tree and can be deleted. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-id: 20240903160751.4100218-3-peter.maydell@linaro.orgpull/271/head
Peter Maydell
2 years ago
4 changed files with 0 additions and 191 deletions
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/*
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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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#include "qom/object.h" |
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struct ADS7846State { |
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SSIPeripheral 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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}; |
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#define TYPE_ADS7846 "ads7846" |
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OBJECT_DECLARE_SIMPLE_TYPE(ADS7846State, 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(SSIPeripheral *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 = (const VMStateField[]) { |
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VMSTATE_SSI_PERIPHERAL(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(SSIPeripheral *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_any(NULL, &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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DeviceClass *dc = DEVICE_CLASS(klass); |
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SSIPeripheralClass *k = SSI_PERIPHERAL_CLASS(klass); |
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k->realize = ads7846_realize; |
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k->transfer = ads7846_transfer; |
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set_bit(DEVICE_CATEGORY_INPUT, dc->categories); |
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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_PERIPHERAL, |
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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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