xref: /openbmc/qemu/hw/arm/msf2-som.c (revision 332dab68785bba0381790fef94f4f433e8e806ea)
1  /*
2   * SmartFusion2 SOM starter kit(from Emcraft) emulation.
3   *
4   * Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.com>
5   *
6   * Permission is hereby granted, free of charge, to any person obtaining a copy
7   * of this software and associated documentation files (the "Software"), to deal
8   * in the Software without restriction, including without limitation the rights
9   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10   * copies of the Software, and to permit persons to whom the Software is
11   * furnished to do so, subject to the following conditions:
12   *
13   * The above copyright notice and this permission notice shall be included in
14   * all copies or substantial portions of the Software.
15   *
16   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22   * THE SOFTWARE.
23   */
24  
25  #include "qemu/osdep.h"
26  #include "qemu/units.h"
27  #include "qapi/error.h"
28  #include "qemu/error-report.h"
29  #include "hw/boards.h"
30  #include "hw/qdev-properties.h"
31  #include "hw/arm/boot.h"
32  #include "hw/qdev-clock.h"
33  #include "exec/address-spaces.h"
34  #include "hw/arm/msf2-soc.h"
35  
36  #define DDR_BASE_ADDRESS      0xA0000000
37  #define DDR_SIZE              (64 * MiB)
38  
39  #define M2S010_ENVM_SIZE      (256 * KiB)
40  #define M2S010_ESRAM_SIZE     (64 * KiB)
41  
42  static void emcraft_sf2_s2s010_init(MachineState *machine)
43  {
44      DeviceState *dev;
45      DeviceState *spi_flash;
46      MSF2State *soc;
47      MachineClass *mc = MACHINE_GET_CLASS(machine);
48      DriveInfo *dinfo = drive_get(IF_MTD, 0, 0);
49      qemu_irq cs_line;
50      BusState *spi_bus;
51      MemoryRegion *sysmem = get_system_memory();
52      MemoryRegion *ddr = g_new(MemoryRegion, 1);
53      Clock *m3clk;
54  
55      if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
56          error_report("This board can only be used with CPU %s",
57                       mc->default_cpu_type);
58          exit(1);
59      }
60  
61      memory_region_init_ram(ddr, NULL, "ddr-ram", DDR_SIZE,
62                             &error_fatal);
63      memory_region_add_subregion(sysmem, DDR_BASE_ADDRESS, ddr);
64  
65      dev = qdev_new(TYPE_MSF2_SOC);
66      qdev_prop_set_string(dev, "part-name", "M2S010");
67      qdev_prop_set_string(dev, "cpu-type", mc->default_cpu_type);
68  
69      qdev_prop_set_uint64(dev, "eNVM-size", M2S010_ENVM_SIZE);
70      qdev_prop_set_uint64(dev, "eSRAM-size", M2S010_ESRAM_SIZE);
71  
72      /*
73       * CPU clock and peripheral clocks(APB0, APB1)are configurable
74       * in Libero. CPU clock is divided by APB0 and APB1 divisors for
75       * peripherals. Emcraft's SoM kit comes with these settings by default.
76       */
77      /* This clock doesn't need migration because it is fixed-frequency */
78      m3clk = clock_new(OBJECT(machine), "m3clk");
79      clock_set_hz(m3clk, 142 * 1000000);
80      qdev_connect_clock_in(dev, "m3clk", m3clk);
81      qdev_prop_set_uint32(dev, "apb0div", 2);
82      qdev_prop_set_uint32(dev, "apb1div", 2);
83  
84      sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
85  
86      soc = MSF2_SOC(dev);
87  
88      /* Attach SPI flash to SPI0 controller */
89      spi_bus = qdev_get_child_bus(dev, "spi0");
90      spi_flash = qdev_new("s25sl12801");
91      qdev_prop_set_uint8(spi_flash, "spansion-cr2nv", 1);
92      if (dinfo) {
93          qdev_prop_set_drive_err(spi_flash, "drive",
94                                  blk_by_legacy_dinfo(dinfo), &error_fatal);
95      }
96      qdev_realize_and_unref(spi_flash, spi_bus, &error_fatal);
97      cs_line = qdev_get_gpio_in_named(spi_flash, SSI_GPIO_CS, 0);
98      sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
99  
100      armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
101                         soc->envm_size);
102  }
103  
104  static void emcraft_sf2_machine_init(MachineClass *mc)
105  {
106      mc->desc = "SmartFusion2 SOM kit from Emcraft (M2S010)";
107      mc->init = emcraft_sf2_s2s010_init;
108      mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
109  }
110  
111  DEFINE_MACHINE("emcraft-sf2", emcraft_sf2_machine_init)
112