a954543092
This patch adds minimal support for AXP-221 PMU and connect it to bananapi M2U board. Signed-off-by: qianfan Zhao <qianfanguijin@163.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/*
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* Bananapi M2U emulation
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*
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* Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "exec/address-spaces.h"
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#include "qapi/error.h"
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#include "qemu/error-report.h"
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#include "hw/boards.h"
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#include "hw/i2c/i2c.h"
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#include "hw/qdev-properties.h"
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#include "hw/arm/allwinner-r40.h"
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static struct arm_boot_info bpim2u_binfo;
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/*
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* R40 can boot from mmc0 and mmc2, and bpim2u has two mmc interface, one is
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* connected to sdcard and another mount an emmc media.
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* Attach the mmc driver and try loading bootloader.
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*/
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static void mmc_attach_drive(AwR40State *s, AwSdHostState *mmc, int unit,
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bool load_bootroom, bool *bootroom_loaded)
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{
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DriveInfo *di = drive_get(IF_SD, 0, unit);
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BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL;
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BusState *bus;
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DeviceState *carddev;
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bus = qdev_get_child_bus(DEVICE(mmc), "sd-bus");
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if (bus == NULL) {
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error_report("No SD bus found in SOC object");
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exit(1);
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}
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carddev = qdev_new(TYPE_SD_CARD);
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qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal);
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qdev_realize_and_unref(carddev, bus, &error_fatal);
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if (load_bootroom && blk && blk_is_available(blk)) {
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/* Use Boot ROM to copy data from SD card to SRAM */
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*bootroom_loaded = allwinner_r40_bootrom_setup(s, blk, unit);
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}
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}
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static void bpim2u_init(MachineState *machine)
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{
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bool bootroom_loaded = false;
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AwR40State *r40;
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I2CBus *i2c;
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/* BIOS is not supported by this board */
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if (machine->firmware) {
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error_report("BIOS not supported for this machine");
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exit(1);
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}
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/* Only allow Cortex-A7 for this board */
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if (strcmp(machine->cpu_type, ARM_CPU_TYPE_NAME("cortex-a7")) != 0) {
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error_report("This board can only be used with cortex-a7 CPU");
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exit(1);
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}
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r40 = AW_R40(object_new(TYPE_AW_R40));
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object_property_add_child(OBJECT(machine), "soc", OBJECT(r40));
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object_unref(OBJECT(r40));
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/* Setup timer properties */
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object_property_set_int(OBJECT(r40), "clk0-freq", 32768, &error_abort);
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object_property_set_int(OBJECT(r40), "clk1-freq", 24 * 1000 * 1000,
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&error_abort);
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/* Mark R40 object realized */
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qdev_realize(DEVICE(r40), NULL, &error_abort);
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/*
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* Plug in SD card and try load bootrom, R40 has 4 mmc controllers but can
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* only booting from mmc0 and mmc2.
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*/
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for (int i = 0; i < AW_R40_NUM_MMCS; i++) {
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switch (i) {
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case 0:
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case 2:
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mmc_attach_drive(r40, &r40->mmc[i], i,
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!machine->kernel_filename && !bootroom_loaded,
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&bootroom_loaded);
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break;
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default:
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mmc_attach_drive(r40, &r40->mmc[i], i, false, NULL);
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break;
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}
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}
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/* Connect AXP221 */
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i2c = I2C_BUS(qdev_get_child_bus(DEVICE(&r40->i2c0), "i2c"));
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i2c_slave_create_simple(i2c, "axp221_pmu", 0x34);
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/* SDRAM */
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memory_region_add_subregion(get_system_memory(),
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r40->memmap[AW_R40_DEV_SDRAM], machine->ram);
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bpim2u_binfo.loader_start = r40->memmap[AW_R40_DEV_SDRAM];
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bpim2u_binfo.ram_size = machine->ram_size;
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bpim2u_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
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arm_load_kernel(ARM_CPU(first_cpu), machine, &bpim2u_binfo);
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}
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static void bpim2u_machine_init(MachineClass *mc)
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{
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mc->desc = "Bananapi M2U (Cortex-A7)";
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mc->init = bpim2u_init;
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mc->min_cpus = AW_R40_NUM_CPUS;
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mc->max_cpus = AW_R40_NUM_CPUS;
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mc->default_cpus = AW_R40_NUM_CPUS;
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mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a7");
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mc->default_ram_size = 1 * GiB;
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mc->default_ram_id = "bpim2u.ram";
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}
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DEFINE_MACHINE("bpim2u", bpim2u_machine_init)
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