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hw/misc/max111x: Create header file for documentation, TYPE_ macros

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Create a header file for the hw/misc/max111x device, in the
usual modern style for QOM devices:
 * definition of the TYPE_ constants and macros
 * definition of the device's state struct so that it can
   be embedded in other structs if desired
 * documentation of the interface

This allows us to use TYPE_MAX_1111 in the spitz.c code rather
than the string "max1111".

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20200628142429.17111-12-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2020-07-03 16:59:45 +01:00
parent 871f82722c
commit 3029681235
4 changed files with 60 additions and 24 deletions
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1
MAINTAINERS
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@ -787,6 +787,7 @@ F: hw/gpio/max7310.c
F: hw/gpio/zaurus.c
F: hw/misc/mst_fpga.c
F: hw/misc/max111x.c
F: include/hw/misc/max111x.h
F: include/hw/arm/pxa.h
F: include/hw/arm/sharpsl.h
F: include/hw/display/tc6393xb.h

3
hw/arm/spitz.c
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@ -29,6 +29,7 @@
#include "audio/audio.h"
#include "hw/boards.h"
#include "hw/sysbus.h"
#include "hw/misc/max111x.h"
#include "migration/vmstate.h"
#include "exec/address-spaces.h"
#include "cpu.h"
@ -732,7 +733,7 @@ static void spitz_ssp_attach(SpitzMachineState *sms)
qdev_get_gpio_in(sms->mpu->gpio, SPITZ_GPIO_TP_INT));
bus = qdev_get_child_bus(sms->mux, "ssi2");
sms->max1111 = qdev_new("max1111");
sms->max1111 = qdev_new(TYPE_MAX_1111);
max1111 = sms->max1111;
qdev_prop_set_uint8(sms->max1111, "input1" /* BATT_VOLT */,
SPITZ_BATTERY_VOLT);

24
hw/misc/max111x.c
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@ -11,34 +11,12 @@
*/
#include "qemu/osdep.h"
#include "hw/misc/max111x.h"
#include "hw/irq.h"
#include "hw/ssi/ssi.h"
#include "migration/vmstate.h"
#include "qemu/module.h"
#include "hw/qdev-properties.h"
typedef struct {
SSISlave parent_obj;
qemu_irq interrupt;
/* Values of inputs at system reset (settable by QOM property) */
uint8_t reset_input[8];
uint8_t tb1, rb2, rb3;
int cycle;
uint8_t input[8];
int inputs, com;
} MAX111xState;
#define TYPE_MAX_111X "max111x"
#define MAX_111X(obj) \
OBJECT_CHECK(MAX111xState, (obj), TYPE_MAX_111X)
#define TYPE_MAX_1110 "max1110"
#define TYPE_MAX_1111 "max1111"
/* Control-byte bitfields */
#define CB_PD0 (1 << 0)
#define CB_PD1 (1 << 1)

56
include/hw/misc/max111x.h Normal file
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@ -0,0 +1,56 @@
/*
* Maxim MAX1110/1111 ADC chip emulation.
*
* Copyright (c) 2006 Openedhand Ltd.
* Written by Andrzej Zaborowski <balrog@zabor.org>
*
* This code is licensed under the GNU GPLv2.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#ifndef HW_MISC_MAX111X_H
#define HW_MISC_MAX111X_H
#include "hw/ssi/ssi.h"
/*
* This is a model of the Maxim MAX1110/1111 ADC chip, which for QEMU
* is an SSI slave device. It has either 4 (max1110) or 8 (max1111)
* 8-bit ADC channels.
*
* QEMU interface:
* + GPIO inputs 0..3 (for max1110) or 0..7 (for max1111): set the value
* of each ADC input, as an unsigned 8-bit value
* + GPIO output 0: interrupt line
* + Properties "input0" to "input3" (max1110) or "input0" to "input7"
* (max1111): initial reset values for ADC inputs.
*
* Known bugs:
* + the interrupt line is not correctly implemented, and will never
* be lowered once it has been asserted.
*/
typedef struct {
SSISlave parent_obj;
qemu_irq interrupt;
/* Values of inputs at system reset (settable by QOM property) */
uint8_t reset_input[8];
uint8_t tb1, rb2, rb3;
int cycle;
uint8_t input[8];
int inputs, com;
} MAX111xState;
#define TYPE_MAX_111X "max111x"
#define MAX_111X(obj) \
OBJECT_CHECK(MAX111xState, (obj), TYPE_MAX_111X)
#define TYPE_MAX_1110 "max1110"
#define TYPE_MAX_1111 "max1111"
#endif