1 /*
2 * Bananapi M2U emulation
3 *
4 * Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/units.h"
22 #include "exec/address-spaces.h"
23 #include "qapi/error.h"
24 #include "qemu/error-report.h"
25 #include "hw/boards.h"
26 #include "hw/i2c/i2c.h"
27 #include "hw/qdev-properties.h"
28 #include "hw/arm/allwinner-r40.h"
29 #include "hw/arm/boot.h"
30
31 static struct arm_boot_info bpim2u_binfo;
32
33 /*
34 * R40 can boot from mmc0 and mmc2, and bpim2u has two mmc interface, one is
35 * connected to sdcard and another mount an emmc media.
36 * Attach the mmc driver and try loading bootloader.
37 */
mmc_attach_drive(AwR40State * s,AwSdHostState * mmc,int unit,bool load_bootroom,bool * bootroom_loaded)38 static void mmc_attach_drive(AwR40State *s, AwSdHostState *mmc, int unit,
39 bool load_bootroom, bool *bootroom_loaded)
40 {
41 DriveInfo *di = drive_get(IF_SD, 0, unit);
42 BlockBackend *blk = di ? blk_by_legacy_dinfo(di) : NULL;
43 BusState *bus;
44 DeviceState *carddev;
45
46 bus = qdev_get_child_bus(DEVICE(mmc), "sd-bus");
47 if (bus == NULL) {
48 error_report("No SD bus found in SOC object");
49 exit(1);
50 }
51
52 carddev = qdev_new(TYPE_SD_CARD);
53 qdev_prop_set_drive_err(carddev, "drive", blk, &error_fatal);
54 qdev_realize_and_unref(carddev, bus, &error_fatal);
55
56 if (load_bootroom && blk && blk_is_available(blk)) {
57 /* Use Boot ROM to copy data from SD card to SRAM */
58 *bootroom_loaded = allwinner_r40_bootrom_setup(s, blk, unit);
59 }
60 }
61
bpim2u_init(MachineState * machine)62 static void bpim2u_init(MachineState *machine)
63 {
64 bool bootroom_loaded = false;
65 AwR40State *r40;
66 I2CBus *i2c;
67
68 /* BIOS is not supported by this board */
69 if (machine->firmware) {
70 error_report("BIOS not supported for this machine");
71 exit(1);
72 }
73
74 /* Only allow Cortex-A7 for this board */
75 if (strcmp(machine->cpu_type, ARM_CPU_TYPE_NAME("cortex-a7")) != 0) {
76 error_report("This board can only be used with cortex-a7 CPU");
77 exit(1);
78 }
79
80 r40 = AW_R40(object_new(TYPE_AW_R40));
81 object_property_add_child(OBJECT(machine), "soc", OBJECT(r40));
82 object_unref(OBJECT(r40));
83
84 /* Setup timer properties */
85 object_property_set_int(OBJECT(r40), "clk0-freq", 32768, &error_abort);
86 object_property_set_int(OBJECT(r40), "clk1-freq", 24 * 1000 * 1000,
87 &error_abort);
88
89 /* DRAMC */
90 r40->ram_size = machine->ram_size / MiB;
91 object_property_set_uint(OBJECT(r40), "ram-addr",
92 r40->memmap[AW_R40_DEV_SDRAM], &error_abort);
93 object_property_set_int(OBJECT(r40), "ram-size",
94 r40->ram_size, &error_abort);
95
96 /* GMAC PHY */
97 object_property_set_uint(OBJECT(r40), "gmac-phy-addr", 1, &error_abort);
98
99 /* Mark R40 object realized */
100 qdev_realize(DEVICE(r40), NULL, &error_abort);
101
102 /*
103 * Plug in SD card and try load bootrom, R40 has 4 mmc controllers but can
104 * only booting from mmc0 and mmc2.
105 */
106 for (int i = 0; i < AW_R40_NUM_MMCS; i++) {
107 switch (i) {
108 case 0:
109 case 2:
110 mmc_attach_drive(r40, &r40->mmc[i], i,
111 !machine->kernel_filename && !bootroom_loaded,
112 &bootroom_loaded);
113 break;
114 default:
115 mmc_attach_drive(r40, &r40->mmc[i], i, false, NULL);
116 break;
117 }
118 }
119
120 /* Connect AXP221 */
121 i2c = I2C_BUS(qdev_get_child_bus(DEVICE(&r40->i2c0), "i2c"));
122 i2c_slave_create_simple(i2c, "axp221_pmu", 0x34);
123
124 /* SDRAM */
125 memory_region_add_subregion(get_system_memory(),
126 r40->memmap[AW_R40_DEV_SDRAM], machine->ram);
127
128 bpim2u_binfo.loader_start = r40->memmap[AW_R40_DEV_SDRAM];
129 bpim2u_binfo.ram_size = machine->ram_size;
130 bpim2u_binfo.psci_conduit = QEMU_PSCI_CONDUIT_SMC;
131 arm_load_kernel(&r40->cpus[0], machine, &bpim2u_binfo);
132 }
133
bpim2u_machine_init(MachineClass * mc)134 static void bpim2u_machine_init(MachineClass *mc)
135 {
136 mc->desc = "Bananapi M2U (Cortex-A7)";
137 mc->init = bpim2u_init;
138 mc->min_cpus = AW_R40_NUM_CPUS;
139 mc->max_cpus = AW_R40_NUM_CPUS;
140 mc->default_cpus = AW_R40_NUM_CPUS;
141 mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-a7");
142 mc->default_ram_size = 1 * GiB;
143 mc->default_ram_id = "bpim2u.ram";
144 }
145
146 DEFINE_MACHINE("bpim2u", bpim2u_machine_init)
147