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misc: add pca9552 LED blinker model
Specs are available here :
https://www.nxp.com/docs/en/application-note/AN264.pdf
This is a simple model supporting the basic registers for led and GPIO
mode. The device also supports two blinking rates but not the model
yet.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180530064049.27976-7-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Cédric Le Goater
Peter Maydell
parent
3d165f12db
commit
5141d4158c
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@ -16,6 +16,7 @@ CONFIG_TSC2005=y
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CONFIG_LM832X=y
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CONFIG_TMP105=y
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CONFIG_TMP421=y
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CONFIG_PCA9552=y
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CONFIG_STELLARIS=y
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CONFIG_STELLARIS_INPUT=y
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CONFIG_STELLARIS_ENET=y
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@ -7,6 +7,7 @@ common-obj-$(CONFIG_SGA) += sga.o
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common-obj-$(CONFIG_ISA_TESTDEV) += pc-testdev.o
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common-obj-$(CONFIG_PCI_TESTDEV) += pci-testdev.o
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common-obj-$(CONFIG_EDU) += edu.o
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common-obj-$(CONFIG_PCA9552) += pca9552.o
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common-obj-y += unimp.o
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common-obj-$(CONFIG_FW_CFG_DMA) += vmcoreinfo.o
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240
hw/misc/pca9552.c
Normal file
240
hw/misc/pca9552.c
Normal file
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@ -0,0 +1,240 @@
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/*
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* PCA9552 I2C LED blinker
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*
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* https://www.nxp.com/docs/en/application-note/AN264.pdf
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*
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* Copyright (c) 2017-2018, IBM Corporation.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "hw/hw.h"
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#include "hw/misc/pca9552.h"
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#include "hw/misc/pca9552_regs.h"
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#define PCA9552_LED_ON 0x0
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#define PCA9552_LED_OFF 0x1
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#define PCA9552_LED_PWM0 0x2
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#define PCA9552_LED_PWM1 0x3
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static uint8_t pca9552_pin_get_config(PCA9552State *s, int pin)
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{
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uint8_t reg = PCA9552_LS0 + (pin / 4);
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uint8_t shift = (pin % 4) << 1;
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return extract32(s->regs[reg], shift, 2);
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}
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static void pca9552_update_pin_input(PCA9552State *s)
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{
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int i;
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for (i = 0; i < s->nr_leds; i++) {
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uint8_t input_reg = PCA9552_INPUT0 + (i / 8);
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uint8_t input_shift = (i % 8);
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uint8_t config = pca9552_pin_get_config(s, i);
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switch (config) {
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case PCA9552_LED_ON:
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s->regs[input_reg] |= 1 << input_shift;
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break;
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case PCA9552_LED_OFF:
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s->regs[input_reg] &= ~(1 << input_shift);
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break;
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case PCA9552_LED_PWM0:
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case PCA9552_LED_PWM1:
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/* TODO */
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default:
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break;
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}
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}
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}
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static uint8_t pca9552_read(PCA9552State *s, uint8_t reg)
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{
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switch (reg) {
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case PCA9552_INPUT0:
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case PCA9552_INPUT1:
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case PCA9552_PSC0:
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case PCA9552_PWM0:
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case PCA9552_PSC1:
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case PCA9552_PWM1:
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case PCA9552_LS0:
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case PCA9552_LS1:
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case PCA9552_LS2:
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case PCA9552_LS3:
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return s->regs[reg];
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: unexpected read to register %d\n",
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__func__, reg);
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return 0xFF;
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}
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}
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static void pca9552_write(PCA9552State *s, uint8_t reg, uint8_t data)
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{
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switch (reg) {
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case PCA9552_PSC0:
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case PCA9552_PWM0:
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case PCA9552_PSC1:
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case PCA9552_PWM1:
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s->regs[reg] = data;
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break;
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case PCA9552_LS0:
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case PCA9552_LS1:
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case PCA9552_LS2:
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case PCA9552_LS3:
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s->regs[reg] = data;
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pca9552_update_pin_input(s);
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break;
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case PCA9552_INPUT0:
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case PCA9552_INPUT1:
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "%s: unexpected write to register %d\n",
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__func__, reg);
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}
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}
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/*
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* When Auto-Increment is on, the register address is incremented
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* after each byte is sent to or received by the device. The index
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* rollovers to 0 when the maximum register address is reached.
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*/
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static void pca9552_autoinc(PCA9552State *s)
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{
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if (s->pointer != 0xFF && s->pointer & PCA9552_AUTOINC) {
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uint8_t reg = s->pointer & 0xf;
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reg = (reg + 1) % (s->max_reg + 1);
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s->pointer = reg | PCA9552_AUTOINC;
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}
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}
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static int pca9552_recv(I2CSlave *i2c)
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{
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PCA9552State *s = PCA9552(i2c);
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uint8_t ret;
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ret = pca9552_read(s, s->pointer & 0xf);
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/*
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* From the Specs:
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*
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* Important Note: When a Read sequence is initiated and the
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* AI bit is set to Logic Level 1, the Read Sequence MUST
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* start by a register different from 0.
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*
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* I don't know what should be done in this case, so throw an
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* error.
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*/
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if (s->pointer == PCA9552_AUTOINC) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: Autoincrement read starting with register 0\n",
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__func__);
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}
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pca9552_autoinc(s);
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return ret;
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}
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static int pca9552_send(I2CSlave *i2c, uint8_t data)
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{
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PCA9552State *s = PCA9552(i2c);
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/* First byte sent by is the register address */
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if (s->len == 0) {
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s->pointer = data;
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s->len++;
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} else {
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pca9552_write(s, s->pointer & 0xf, data);
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pca9552_autoinc(s);
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}
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return 0;
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}
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static int pca9552_event(I2CSlave *i2c, enum i2c_event event)
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{
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PCA9552State *s = PCA9552(i2c);
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s->len = 0;
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return 0;
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}
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static const VMStateDescription pca9552_vmstate = {
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.name = "PCA9552",
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.version_id = 0,
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.minimum_version_id = 0,
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.fields = (VMStateField[]) {
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VMSTATE_UINT8(len, PCA9552State),
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VMSTATE_UINT8(pointer, PCA9552State),
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VMSTATE_UINT8_ARRAY(regs, PCA9552State, PCA9552_NR_REGS),
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VMSTATE_I2C_SLAVE(i2c, PCA9552State),
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VMSTATE_END_OF_LIST()
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}
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};
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static void pca9552_reset(DeviceState *dev)
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{
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PCA9552State *s = PCA9552(dev);
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s->regs[PCA9552_PSC0] = 0xFF;
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s->regs[PCA9552_PWM0] = 0x80;
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s->regs[PCA9552_PSC1] = 0xFF;
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s->regs[PCA9552_PWM1] = 0x80;
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s->regs[PCA9552_LS0] = 0x55; /* all OFF */
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s->regs[PCA9552_LS1] = 0x55;
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s->regs[PCA9552_LS2] = 0x55;
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s->regs[PCA9552_LS3] = 0x55;
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pca9552_update_pin_input(s);
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s->pointer = 0xFF;
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s->len = 0;
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}
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static void pca9552_initfn(Object *obj)
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{
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PCA9552State *s = PCA9552(obj);
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/* If support for the other PCA955X devices are implemented, these
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* constant values might be part of class structure describing the
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* PCA955X device
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*/
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s->max_reg = PCA9552_LS3;
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s->nr_leds = 16;
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}
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static void pca9552_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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I2CSlaveClass *k = I2C_SLAVE_CLASS(klass);
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k->event = pca9552_event;
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k->recv = pca9552_recv;
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k->send = pca9552_send;
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dc->reset = pca9552_reset;
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dc->vmsd = &pca9552_vmstate;
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}
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static const TypeInfo pca9552_info = {
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.name = TYPE_PCA9552,
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.parent = TYPE_I2C_SLAVE,
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.instance_init = pca9552_initfn,
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.instance_size = sizeof(PCA9552State),
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.class_init = pca9552_class_init,
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};
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static void pca9552_register_types(void)
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{
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type_register_static(&pca9552_info);
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}
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type_init(pca9552_register_types)
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32
include/hw/misc/pca9552.h
Normal file
32
include/hw/misc/pca9552.h
Normal file
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@ -0,0 +1,32 @@
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/*
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* PCA9552 I2C LED blinker
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*
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* Copyright (c) 2017-2018, IBM Corporation.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef PCA9552_H
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#define PCA9552_H
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#include "hw/i2c/i2c.h"
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#define TYPE_PCA9552 "pca9552"
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#define PCA9552(obj) OBJECT_CHECK(PCA9552State, (obj), TYPE_PCA9552)
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#define PCA9552_NR_REGS 10
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typedef struct PCA9552State {
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/*< private >*/
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I2CSlave i2c;
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/*< public >*/
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uint8_t len;
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uint8_t pointer;
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uint8_t regs[PCA9552_NR_REGS];
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uint8_t max_reg;
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uint8_t nr_leds;
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} PCA9552State;
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#endif
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32
include/hw/misc/pca9552_regs.h
Normal file
32
include/hw/misc/pca9552_regs.h
Normal file
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@ -0,0 +1,32 @@
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/*
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* PCA9552 I2C LED blinker registers
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*
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* Copyright (c) 2017-2018, IBM Corporation.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#ifndef PCA9552_REGS_H
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#define PCA9552_REGS_H
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/*
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* Bits [0:3] are used to address a specific register.
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*/
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#define PCA9552_INPUT0 0 /* read only input register 0 */
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#define PCA9552_INPUT1 1 /* read only input register 1 */
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#define PCA9552_PSC0 2 /* read/write frequency prescaler 0 */
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#define PCA9552_PWM0 3 /* read/write PWM register 0 */
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#define PCA9552_PSC1 4 /* read/write frequency prescaler 1 */
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#define PCA9552_PWM1 5 /* read/write PWM register 1 */
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#define PCA9552_LS0 6 /* read/write LED0 to LED3 selector */
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#define PCA9552_LS1 7 /* read/write LED4 to LED7 selector */
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#define PCA9552_LS2 8 /* read/write LED8 to LED11 selector */
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#define PCA9552_LS3 9 /* read/write LED12 to LED15 selector */
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/*
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* Bit [4] is used to activate the Auto-Increment option of the
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* register address
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*/
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#define PCA9552_AUTOINC (1 << 4)
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#endif
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@ -373,6 +373,7 @@ check-qtest-sparc64-y += tests/prom-env-test$(EXESUF)
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check-qtest-sparc64-y += tests/boot-serial-test$(EXESUF)
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check-qtest-arm-y = tests/tmp105-test$(EXESUF)
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check-qtest-arm-y += tests/pca9552-test$(EXESUF)
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check-qtest-arm-y += tests/ds1338-test$(EXESUF)
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check-qtest-arm-y += tests/m25p80-test$(EXESUF)
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gcov-files-arm-y += hw/misc/tmp105.c
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@ -778,6 +779,7 @@ tests/bios-tables-test$(EXESUF): tests/bios-tables-test.o \
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tests/boot-sector.o tests/acpi-utils.o $(libqos-obj-y)
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tests/pxe-test$(EXESUF): tests/pxe-test.o tests/boot-sector.o $(libqos-obj-y)
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tests/tmp105-test$(EXESUF): tests/tmp105-test.o $(libqos-omap-obj-y)
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tests/pca9552-test$(EXESUF): tests/pca9552-test.o $(libqos-omap-obj-y)
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tests/ds1338-test$(EXESUF): tests/ds1338-test.o $(libqos-imx-obj-y)
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tests/m25p80-test$(EXESUF): tests/m25p80-test.o
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tests/i440fx-test$(EXESUF): tests/i440fx-test.o $(libqos-pc-obj-y)
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@ -21,6 +21,8 @@ struct I2CAdapter {
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QTestState *qts;
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};
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#define OMAP2_I2C_1_BASE 0x48070000
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void i2c_send(I2CAdapter *i2c, uint8_t addr,
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const uint8_t *buf, uint16_t len);
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void i2c_recv(I2CAdapter *i2c, uint8_t addr,
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116
tests/pca9552-test.c
Normal file
116
tests/pca9552-test.c
Normal file
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@ -0,0 +1,116 @@
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/*
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* QTest testcase for the PCA9552 LED blinker
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*
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* Copyright (c) 2017-2018, IBM Corporation.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "libqtest.h"
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#include "libqos/i2c.h"
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#include "hw/misc/pca9552_regs.h"
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#define PCA9552_TEST_ID "pca9552-test"
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#define PCA9552_TEST_ADDR 0x60
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static I2CAdapter *i2c;
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static uint8_t pca9552_get8(I2CAdapter *i2c, uint8_t addr, uint8_t reg)
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{
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uint8_t resp[1];
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i2c_send(i2c, addr, ®, 1);
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i2c_recv(i2c, addr, resp, 1);
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return resp[0];
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}
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static void pca9552_set8(I2CAdapter *i2c, uint8_t addr, uint8_t reg,
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uint8_t value)
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{
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uint8_t cmd[2];
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uint8_t resp[1];
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cmd[0] = reg;
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cmd[1] = value;
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i2c_send(i2c, addr, cmd, 2);
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i2c_recv(i2c, addr, resp, 1);
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g_assert_cmphex(resp[0], ==, cmd[1]);
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}
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static void receive_autoinc(void)
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{
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uint8_t resp;
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uint8_t reg = PCA9552_LS0 | PCA9552_AUTOINC;
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i2c_send(i2c, PCA9552_TEST_ADDR, ®, 1);
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/* PCA9552_LS0 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x54);
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/* PCA9552_LS1 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x55);
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/* PCA9552_LS2 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x55);
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/* PCA9552_LS3 */
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i2c_recv(i2c, PCA9552_TEST_ADDR, &resp, 1);
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g_assert_cmphex(resp, ==, 0x54);
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}
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static void send_and_receive(void)
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{
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uint8_t value;
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
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g_assert_cmphex(value, ==, 0x55);
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value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
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g_assert_cmphex(value, ==, 0x0);
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/* Switch on LED 0 */
|
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pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0, 0x54);
|
||||
value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS0);
|
||||
g_assert_cmphex(value, ==, 0x54);
|
||||
|
||||
value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT0);
|
||||
g_assert_cmphex(value, ==, 0x01);
|
||||
|
||||
/* Switch on LED 12 */
|
||||
pca9552_set8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3, 0x54);
|
||||
value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_LS3);
|
||||
g_assert_cmphex(value, ==, 0x54);
|
||||
|
||||
value = pca9552_get8(i2c, PCA9552_TEST_ADDR, PCA9552_INPUT1);
|
||||
g_assert_cmphex(value, ==, 0x10);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
QTestState *s = NULL;
|
||||
int ret;
|
||||
|
||||
g_test_init(&argc, &argv, NULL);
|
||||
|
||||
s = qtest_start("-machine n800 "
|
||||
"-device pca9552,bus=i2c-bus.0,id=" PCA9552_TEST_ID
|
||||
",address=0x60");
|
||||
i2c = omap_i2c_create(s, OMAP2_I2C_1_BASE);
|
||||
|
||||
qtest_add_func("/pca9552/tx-rx", send_and_receive);
|
||||
qtest_add_func("/pca9552/rx-autoinc", receive_autoinc);
|
||||
|
||||
ret = g_test_run();
|
||||
|
||||
if (s) {
|
||||
qtest_quit(s);
|
||||
}
|
||||
g_free(i2c);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
|
@ -14,8 +14,6 @@
|
|||
#include "qapi/qmp/qdict.h"
|
||||
#include "hw/misc/tmp105_regs.h"
|
||||
|
||||
#define OMAP2_I2C_1_BASE 0x48070000
|
||||
|
||||
#define TMP105_TEST_ID "tmp105-test"
|
||||
#define TMP105_TEST_ADDR 0x49
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue