Add DesignWare I2C controllers to the tt-atlantis machine. Provide a fixed clock in the device tree so that the Linux driver probes without WARNing.
Reviewed-by: Philippe Mathieu-Daudé <[email protected]> Signed-off-by: Nicholas Piggin <[email protected]> Signed-off-by: Joel Stanley <[email protected]> --- include/hw/riscv/tt_atlantis.h | 14 ++++++++ hw/riscv/tt_atlantis.c | 59 ++++++++++++++++++++++++++++++++++ hw/riscv/Kconfig | 1 + 3 files changed, 74 insertions(+) diff --git a/include/hw/riscv/tt_atlantis.h b/include/hw/riscv/tt_atlantis.h index a17732ce8114..7f7d4a5a5905 100644 --- a/include/hw/riscv/tt_atlantis.h +++ b/include/hw/riscv/tt_atlantis.h @@ -11,12 +11,15 @@ #include "hw/core/boards.h" #include "hw/core/sysbus.h" +#include "hw/i2c/designware_i2c.h" #include "hw/intc/riscv_imsic.h" #include "hw/riscv/riscv_hart.h" #define TYPE_TT_ATLANTIS_MACHINE MACHINE_TYPE_NAME("tt-atlantis") OBJECT_DECLARE_SIMPLE_TYPE(TTAtlantisState, TT_ATLANTIS_MACHINE) +#define TT_ATL_NUM_I2C 5 + struct TTAtlantisState { /*< private >*/ MachineState parent; @@ -27,11 +30,17 @@ struct TTAtlantisState { RISCVHartArrayState soc; DeviceState *irqchip; + DesignWareI2CState i2c[TT_ATL_NUM_I2C]; int fdt_size; }; enum { + TT_ATL_I2C0_IRQ = 33, + TT_ATL_I2C1_IRQ = 34, + TT_ATL_I2C2_IRQ = 35, + TT_ATL_I2C3_IRQ = 36, + TT_ATL_I2C4_IRQ = 37, TT_ATL_UART1_IRQ = 39, }; @@ -40,6 +49,11 @@ enum { TT_ATL_BOOTROM, TT_ATL_DDR_LO, TT_ATL_DDR_HI, + TT_ATL_I2C0, + TT_ATL_I2C1, + TT_ATL_I2C2, + TT_ATL_I2C3, + TT_ATL_I2C4, TT_ATL_MAPLIC, TT_ATL_MIMSIC, TT_ATL_SAPLIC, diff --git a/hw/riscv/tt_atlantis.c b/hw/riscv/tt_atlantis.c index 5de138578b48..b1ff0cbe2f61 100644 --- a/hw/riscv/tt_atlantis.c +++ b/hw/riscv/tt_atlantis.c @@ -53,6 +53,11 @@ static const MemMapEntry tt_atlantis_memmap[] = { [TT_ATL_ACLINT] = { 0xa2180000, 0x10000 }, [TT_ATL_SIMSIC] = { 0xa4000000, 0x200000 }, [TT_ATL_MAPLIC] = { 0xcc000000, 0x4000000 }, + [TT_ATL_I2C0] = { 0xd4040000, 0x10000 }, + [TT_ATL_I2C1] = { 0xd4050000, 0x10000 }, + [TT_ATL_I2C2] = { 0xd4060000, 0x10000 }, + [TT_ATL_I2C3] = { 0xd4070000, 0x10000 }, + [TT_ATL_I2C4] = { 0xd4080000, 0x10000 }, [TT_ATL_UART1] = { 0xd4110000, 0x10000 }, [TT_ATL_SAPLIC] = { 0xe8000000, 0x4000000 }, [TT_ATL_DDR_HI] = { 0x100000000, 0x1000000000 }, @@ -333,10 +338,40 @@ static void create_fdt_rng(void *fdt) qemu_fdt_setprop(fdt, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); } +static void create_fdt_clk(void *fdt, const char *clock_name, + uint32_t freq, uint32_t phandle) +{ + g_autofree char *name = g_strdup_printf("/clocks/%s", clock_name); + + qemu_fdt_add_path(fdt, name); + qemu_fdt_setprop_string(fdt, name, "compatible", "fixed-clock"); + qemu_fdt_setprop_string(fdt, name, "clock-output-names", clock_name); + qemu_fdt_setprop_cell(fdt, name, "#clock-cells", 0); + qemu_fdt_setprop_cell(fdt, name, "clock-frequency", freq); + qemu_fdt_setprop_cell(fdt, name, "phandle", phandle); +} + +static void create_fdt_i2c(void *fdt, const MemMapEntry *mem, uint32_t irq, + uint32_t irqchip_phandle, uint32_t clk_phandle) +{ + g_autofree char *name = g_strdup_printf("/soc/i2c@%"HWADDR_PRIX, mem->base); + + qemu_fdt_add_subnode(fdt, name); + qemu_fdt_setprop_string(fdt, name, "compatible", "snps,designware-i2c"); + qemu_fdt_setprop_sized_cells(fdt, name, "reg", 2, mem->base, 2, mem->size); + qemu_fdt_setprop_cell(fdt, name, "interrupt-parent", irqchip_phandle); + qemu_fdt_setprop_cells(fdt, name, "interrupts", irq, 0x4); + qemu_fdt_setprop_cell(fdt, name, "clocks", clk_phandle); + qemu_fdt_setprop_cell(fdt, name, "clock-frequency", 100000); + qemu_fdt_setprop_cell(fdt, name, "#address-cells", 1); + qemu_fdt_setprop_cell(fdt, name, "#size-cells", 0); +} + static void finalize_fdt(TTAtlantisState *s) { uint32_t aplic_s_phandle = next_phandle(); uint32_t imsic_s_phandle = next_phandle(); + uint32_t periph_clk_phandle = next_phandle(); void *fdt = MACHINE(s)->fdt; create_fdt_cpu(s, s->memmap, aplic_s_phandle, imsic_s_phandle); @@ -350,6 +385,15 @@ static void finalize_fdt(TTAtlantisState *s) create_fdt_uart(fdt, &s->memmap[TT_ATL_UART1], TT_ATL_UART1_IRQ, aplic_s_phandle); + + create_fdt_clk(fdt, "periph-clk", 100000000, periph_clk_phandle); + + for (int i = 0; i < TT_ATL_NUM_I2C; i++) { + create_fdt_i2c(fdt, + &s->memmap[TT_ATL_I2C0 + i], + TT_ATL_I2C0_IRQ + i, + aplic_s_phandle, periph_clk_phandle); + } } static void create_fdt(TTAtlantisState *s) @@ -581,6 +625,21 @@ static void tt_atlantis_machine_init(MachineState *machine) s->memmap[TT_ATL_UART1].base, s->memmap[TT_ATL_UART1].size); + /* I2C */ + for (int i = 0; i < TT_ATL_NUM_I2C; i++) { + SysBusDevice *sbd; + + object_initialize_child(OBJECT(s), "i2c[*]", &s->i2c[i], + TYPE_DESIGNWARE_I2C); + sbd = SYS_BUS_DEVICE(&s->i2c[i]); + sysbus_realize(sbd, &error_fatal); + memory_region_add_subregion(system_memory, + s->memmap[TT_ATL_I2C0 + i].base, + sysbus_mmio_get_region(sbd, 0)); + sysbus_connect_irq(sbd, 0, + qdev_get_gpio_in(s->irqchip, TT_ATL_I2C0_IRQ + i)); + } + /* Load or create device tree */ if (machine->dtb) { load_fdt(s); diff --git a/hw/riscv/Kconfig b/hw/riscv/Kconfig index aaf029c9ed5e..38180a903fbf 100644 --- a/hw/riscv/Kconfig +++ b/hw/riscv/Kconfig @@ -129,6 +129,7 @@ config TENSTORRENT select RISCV_IMSIC select SERIAL_MM select DEVICE_TREE + select DESIGNWARE_I2C config XIANGSHAN_KUNMINGHU bool -- 2.47.3
