diff options
Diffstat (limited to 'hw/riscv/sifive_u.c')
| -rw-r--r-- | hw/riscv/sifive_u.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/hw/riscv/sifive_u.c b/hw/riscv/sifive_u.c index 59b61cea01..43a0e983d2 100644 --- a/hw/riscv/sifive_u.c +++ b/hw/riscv/sifive_u.c @@ -15,6 +15,7 @@ * 5) OTP (One-Time Programmable) memory with stored serial number * 6) GEM (Gigabit Ethernet Controller) and management block * 7) DMA (Direct Memory Access Controller) + * 8) SPI0 connected to an SPI flash * * This board currently generates devicetree dynamically that indicates at least * two harts and up to five harts. @@ -44,6 +45,7 @@ #include "hw/char/serial.h" #include "hw/cpu/cluster.h" #include "hw/misc/unimp.h" +#include "hw/ssi/ssi.h" #include "target/riscv/cpu.h" #include "hw/riscv/riscv_hart.h" #include "hw/riscv/sifive_u.h" @@ -74,6 +76,7 @@ static const struct MemmapEntry { [SIFIVE_U_DEV_PRCI] = { 0x10000000, 0x1000 }, [SIFIVE_U_DEV_UART0] = { 0x10010000, 0x1000 }, [SIFIVE_U_DEV_UART1] = { 0x10011000, 0x1000 }, + [SIFIVE_U_DEV_QSPI0] = { 0x10040000, 0x1000 }, [SIFIVE_U_DEV_GPIO] = { 0x10060000, 0x1000 }, [SIFIVE_U_DEV_OTP] = { 0x10070000, 0x1000 }, [SIFIVE_U_DEV_GEM] = { 0x10090000, 0x2000 }, @@ -342,6 +345,32 @@ static void create_fdt(SiFiveUState *s, const struct MemmapEntry *memmap, "sifive,fu540-c000-ccache"); g_free(nodename); + nodename = g_strdup_printf("/soc/spi@%lx", + (long)memmap[SIFIVE_U_DEV_QSPI0].base); + qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cell(fdt, nodename, "#size-cells", 0); + qemu_fdt_setprop_cell(fdt, nodename, "#address-cells", 1); + qemu_fdt_setprop_cells(fdt, nodename, "clocks", + prci_phandle, PRCI_CLK_TLCLK); + qemu_fdt_setprop_cell(fdt, nodename, "interrupts", SIFIVE_U_QSPI0_IRQ); + qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle); + qemu_fdt_setprop_cells(fdt, nodename, "reg", + 0x0, memmap[SIFIVE_U_DEV_QSPI0].base, + 0x0, memmap[SIFIVE_U_DEV_QSPI0].size); + qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,spi0"); + g_free(nodename); + + nodename = g_strdup_printf("/soc/spi@%lx/flash@0", + (long)memmap[SIFIVE_U_DEV_QSPI0].base); + qemu_fdt_add_subnode(fdt, nodename); + qemu_fdt_setprop_cell(fdt, nodename, "spi-rx-bus-width", 4); + qemu_fdt_setprop_cell(fdt, nodename, "spi-tx-bus-width", 4); + qemu_fdt_setprop(fdt, nodename, "m25p,fast-read", NULL, 0); + qemu_fdt_setprop_cell(fdt, nodename, "spi-max-frequency", 50000000); + qemu_fdt_setprop_cell(fdt, nodename, "reg", 0); + qemu_fdt_setprop_string(fdt, nodename, "compatible", "jedec,spi-nor"); + g_free(nodename); + phy_phandle = phandle++; nodename = g_strdup_printf("/soc/ethernet@%lx", (long)memmap[SIFIVE_U_DEV_GEM].base); @@ -439,6 +468,9 @@ static void sifive_u_machine_init(MachineState *machine) int i; uint32_t fdt_load_addr; uint64_t kernel_entry; + DriveInfo *dinfo; + DeviceState *flash_dev; + qemu_irq flash_cs; /* Initialize SoC */ object_initialize_child(OBJECT(machine), "soc", &s->soc, TYPE_RISCV_U_SOC); @@ -571,6 +603,19 @@ static void sifive_u_machine_init(MachineState *machine) riscv_rom_copy_firmware_info(machine, memmap[SIFIVE_U_DEV_MROM].base, memmap[SIFIVE_U_DEV_MROM].size, sizeof(reset_vec), kernel_entry); + + /* Connect an SPI flash to SPI0 */ + flash_dev = qdev_new("is25wp256"); + dinfo = drive_get_next(IF_MTD); + if (dinfo) { + qdev_prop_set_drive_err(flash_dev, "drive", + blk_by_legacy_dinfo(dinfo), + &error_fatal); + } + qdev_realize_and_unref(flash_dev, BUS(s->soc.spi0.spi), &error_fatal); + + flash_cs = qdev_get_gpio_in_named(flash_dev, SSI_GPIO_CS, 0); + sysbus_connect_irq(SYS_BUS_DEVICE(&s->soc.spi0), 1, flash_cs); } static bool sifive_u_machine_get_start_in_flash(Object *obj, Error **errp) @@ -680,6 +725,7 @@ static void sifive_u_soc_instance_init(Object *obj) object_initialize_child(obj, "gem", &s->gem, TYPE_CADENCE_GEM); object_initialize_child(obj, "gpio", &s->gpio, TYPE_SIFIVE_GPIO); object_initialize_child(obj, "pdma", &s->dma, TYPE_SIFIVE_PDMA); + object_initialize_child(obj, "spi0", &s->spi0, TYPE_SIFIVE_SPI); } static void sifive_u_soc_realize(DeviceState *dev, Error **errp) @@ -827,6 +873,12 @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp) create_unimplemented_device("riscv.sifive.u.l2cc", memmap[SIFIVE_U_DEV_L2CC].base, memmap[SIFIVE_U_DEV_L2CC].size); + + sysbus_realize(SYS_BUS_DEVICE(&s->spi0), errp); + sysbus_mmio_map(SYS_BUS_DEVICE(&s->spi0), 0, + memmap[SIFIVE_U_DEV_QSPI0].base); + sysbus_connect_irq(SYS_BUS_DEVICE(&s->spi0), 0, + qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_U_QSPI0_IRQ)); } static Property sifive_u_soc_props[] = { |