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hw/arm: Connect SPI Controller to BCM2835

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This patch will allow the SPI controller to be accessible from BCM2835 based
boards as SPI0. SPI driver is usually disabled by default and config.txt does
not work.

Instead, dtmerge can be used to apply spi=on on a bcm2835 dtb file.

Signed-off-by: Rayhan Faizel <rayhan.faizel@gmail.com>
Message-id: 20240129221807.2983148-3-rayhan.faizel@gmail.com
[PMM: indent tweak]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Rayhan Faizel 2024-01-30 03:48:08 +05:30 • committed by Peter Maydell
parent 28004fb741
commit f09c2b7ba9
3 changed files with 19 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

1
hw/arm/Kconfig
View file

@ -429,6 +429,7 @@ config RASPI
select PL011 # UART
select SDHCI
select USB_DWC2
select BCM2835_SPI
config STM32F100_SOC
bool

17
hw/arm/bcm2835_peripherals.c
View file

@ -144,6 +144,10 @@ static void bcm2835_peripherals_init(Object *obj)
/* Power Management */
object_initialize_child(obj, "powermgt", &s->powermgt,
TYPE_BCM2835_POWERMGT);
/* SPI */
object_initialize_child(obj, "bcm2835-spi0", &s->spi[0],
TYPE_BCM2835_SPI);
}
static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
@ -402,11 +406,22 @@ static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
memory_region_add_subregion(&s->peri_mr, PM_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->powermgt), 0));
/* SPI */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[0]), errp)) {
return;
}
memory_region_add_subregion(&s->peri_mr, SPI0_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->spi[0]), 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi[0]), 0,
qdev_get_gpio_in_named(DEVICE(&s->ic),
BCM2835_IC_GPU_IRQ,
INTERRUPT_SPI));
create_unimp(s, &s->txp, "bcm2835-txp", TXP_OFFSET, 0x1000);
create_unimp(s, &s->armtmr, "bcm2835-sp804", ARMCTRL_TIMER0_1_OFFSET, 0x40);
create_unimp(s, &s->i2s, "bcm2835-i2s", I2S_OFFSET, 0x100);
create_unimp(s, &s->smi, "bcm2835-smi", SMI_OFFSET, 0x100);
create_unimp(s, &s->spi[0], "bcm2835-spi0", SPI0_OFFSET, 0x20);
create_unimp(s, &s->bscsl, "bcm2835-spis", BSC_SL_OFFSET, 0x100);
create_unimp(s, &s->i2c[0], "bcm2835-i2c0", BSC0_OFFSET, 0x20);
create_unimp(s, &s->i2c[1], "bcm2835-i2c1", BSC1_OFFSET, 0x20);

3
include/hw/arm/bcm2835_peripherals.h
View file

@ -31,6 +31,7 @@
#include "hw/gpio/bcm2835_gpio.h"
#include "hw/timer/bcm2835_systmr.h"
#include "hw/usb/hcd-dwc2.h"
#include "hw/ssi/bcm2835_spi.h"
#include "hw/misc/unimp.h"
#include "qom/object.h"
@ -66,7 +67,7 @@ struct BCM2835PeripheralState {
BCM2835GpioState gpio;
Bcm2835ThermalState thermal;
UnimplementedDeviceState i2s;
UnimplementedDeviceState spi[1];
BCM2835SPIState spi[1];
UnimplementedDeviceState i2c[3];
UnimplementedDeviceState otp;
UnimplementedDeviceState dbus;