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sifive_u: Connect the SiFive PWM device 

Connect the SiFive PWM device and expose it via the device tree.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Message-id: 22f98648b4e012f78529a56f5ca60b0b27852a4d.1631159656.git.alistair.francis@wdc.com
This commit is contained in:
Alistair Francis 2021-09-09 13:55:15 +10:00
parent 5bf6f1acdd
commit ea6eaa0604
4 changed files with 69 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
docs/system/riscv/sifive_u.rst
View File

@ -24,6 +24,7 @@ The ``sifive_u`` machine supports the following devices:
* 2 QSPI controllers
* 1 ISSI 25WP256 flash
* 1 SD card in SPI mode
* PWM0 and PWM1
Please note the real world HiFive Unleashed board has a fixed configuration of
1 E51 core and 4 U54 core combination and the RISC-V core boots in 64-bit mode.

1
hw/riscv/Kconfig
View File

@ -69,6 +69,7 @@ config SIFIVE_U
select SIFIVE_UART
select SIFIVE_U_OTP
select SIFIVE_U_PRCI
select SIFIVE_PWM
select SSI_M25P80
select SSI_SD
select UNIMP

55
hw/riscv/sifive_u.c
View File

@ -17,6 +17,7 @@
* 7) DMA (Direct Memory Access Controller)
* 8) SPI0 connected to an SPI flash
* 9) SPI2 connected to an SD card
* 10) PWM0 and PWM1
*
* This board currently generates devicetree dynamically that indicates at least
* two harts and up to five harts.
@ -75,6 +76,8 @@ static const MemMapEntry sifive_u_memmap[] = {
[SIFIVE_U_DEV_PRCI] = { 0x10000000, 0x1000 },
[SIFIVE_U_DEV_UART0] = { 0x10010000, 0x1000 },
[SIFIVE_U_DEV_UART1] = { 0x10011000, 0x1000 },
[SIFIVE_U_DEV_PWM0] = { 0x10020000, 0x1000 },
[SIFIVE_U_DEV_PWM1] = { 0x10021000, 0x1000 },
[SIFIVE_U_DEV_QSPI0] = { 0x10040000, 0x1000 },
[SIFIVE_U_DEV_QSPI2] = { 0x10050000, 0x1000 },
[SIFIVE_U_DEV_GPIO] = { 0x10060000, 0x1000 },
@ -441,6 +444,38 @@ static void create_fdt(SiFiveUState *s, const MemMapEntry *memmap,
qemu_fdt_setprop_cell(fdt, nodename, "reg", 0x0);
g_free(nodename);
nodename = g_strdup_printf("/soc/pwm@%lx",
(long)memmap[SIFIVE_U_DEV_PWM0].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,pwm0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SIFIVE_U_DEV_PWM0].base,
0x0, memmap[SIFIVE_U_DEV_PWM0].size);
qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "interrupts",
SIFIVE_U_PWM0_IRQ0, SIFIVE_U_PWM0_IRQ1,
SIFIVE_U_PWM0_IRQ2, SIFIVE_U_PWM0_IRQ3);
qemu_fdt_setprop_cells(fdt, nodename, "clocks",
prci_phandle, PRCI_CLK_TLCLK);
qemu_fdt_setprop_cell(fdt, nodename, "#pwm-cells", 0);
g_free(nodename);
nodename = g_strdup_printf("/soc/pwm@%lx",
(long)memmap[SIFIVE_U_DEV_PWM1].base);
qemu_fdt_add_subnode(fdt, nodename);
qemu_fdt_setprop_string(fdt, nodename, "compatible", "sifive,pwm0");
qemu_fdt_setprop_cells(fdt, nodename, "reg",
0x0, memmap[SIFIVE_U_DEV_PWM1].base,
0x0, memmap[SIFIVE_U_DEV_PWM1].size);
qemu_fdt_setprop_cell(fdt, nodename, "interrupt-parent", plic_phandle);
qemu_fdt_setprop_cells(fdt, nodename, "interrupts",
SIFIVE_U_PWM1_IRQ0, SIFIVE_U_PWM1_IRQ1,
SIFIVE_U_PWM1_IRQ2, SIFIVE_U_PWM1_IRQ3);
qemu_fdt_setprop_cells(fdt, nodename, "clocks",
prci_phandle, PRCI_CLK_TLCLK);
qemu_fdt_setprop_cell(fdt, nodename, "#pwm-cells", 0);
g_free(nodename);
nodename = g_strdup_printf("/soc/serial@%lx",
(long)memmap[SIFIVE_U_DEV_UART1].base);
qemu_fdt_add_subnode(fdt, nodename);
@ -765,6 +800,8 @@ static void sifive_u_soc_instance_init(Object *obj)
object_initialize_child(obj, "pdma", &s->dma, TYPE_SIFIVE_PDMA);
object_initialize_child(obj, "spi0", &s->spi0, TYPE_SIFIVE_SPI);
object_initialize_child(obj, "spi2", &s->spi2, TYPE_SIFIVE_SPI);
object_initialize_child(obj, "pwm0", &s->pwm[0], TYPE_SIFIVE_PWM);
object_initialize_child(obj, "pwm1", &s->pwm[1], TYPE_SIFIVE_PWM);
}
static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
@ -777,7 +814,7 @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
MemoryRegion *l2lim_mem = g_new(MemoryRegion, 1);
char *plic_hart_config;
size_t plic_hart_config_len;
int i;
int i, j;
NICInfo *nd = &nd_table[0];
qdev_prop_set_uint32(DEVICE(&s->u_cpus), "num-harts", ms->smp.cpus - 1);
@ -904,6 +941,22 @@ static void sifive_u_soc_realize(DeviceState *dev, Error **errp)
sysbus_connect_irq(SYS_BUS_DEVICE(&s->gem), 0,
qdev_get_gpio_in(DEVICE(s->plic), SIFIVE_U_GEM_IRQ));
/* PWM */
for (i = 0; i < 2; i++) {
if (!sysbus_realize(SYS_BUS_DEVICE(&s->pwm[i]), errp)) {
return;
}
sysbus_mmio_map(SYS_BUS_DEVICE(&s->pwm[i]), 0,
memmap[SIFIVE_U_DEV_PWM0].base + (0x1000 * i));
/* Connect PWM interrupts to the PLIC */
for (j = 0; j < SIFIVE_PWM_IRQS; j++) {
sysbus_connect_irq(SYS_BUS_DEVICE(&s->pwm[i]), j,
qdev_get_gpio_in(DEVICE(s->plic),
SIFIVE_U_PWM0_IRQ0 + (i * 4) + j));
}
}
create_unimplemented_device("riscv.sifive.u.gem-mgmt",
memmap[SIFIVE_U_DEV_GEM_MGMT].base, memmap[SIFIVE_U_DEV_GEM_MGMT].size);

14
include/hw/riscv/sifive_u.h
View File

@ -27,6 +27,7 @@
#include "hw/misc/sifive_u_otp.h"
#include "hw/misc/sifive_u_prci.h"
#include "hw/ssi/sifive_spi.h"
#include "hw/timer/sifive_pwm.h"
#define TYPE_RISCV_U_SOC "riscv.sifive.u.soc"
#define RISCV_U_SOC(obj) \
@ -49,6 +50,7 @@ typedef struct SiFiveUSoCState {
SiFiveSPIState spi0;
SiFiveSPIState spi2;
CadenceGEMState gem;
SiFivePwmState pwm[2];
uint32_t serial;
char *cpu_type;
@ -92,7 +94,9 @@ enum {
SIFIVE_U_DEV_FLASH0,
SIFIVE_U_DEV_DRAM,
SIFIVE_U_DEV_GEM,
SIFIVE_U_DEV_GEM_MGMT
SIFIVE_U_DEV_GEM_MGMT,
SIFIVE_U_DEV_PWM0,
SIFIVE_U_DEV_PWM1
};
enum {
@ -126,6 +130,14 @@ enum {
SIFIVE_U_PDMA_IRQ5 = 28,
SIFIVE_U_PDMA_IRQ6 = 29,
SIFIVE_U_PDMA_IRQ7 = 30,
SIFIVE_U_PWM0_IRQ0 = 42,
SIFIVE_U_PWM0_IRQ1 = 43,
SIFIVE_U_PWM0_IRQ2 = 44,
SIFIVE_U_PWM0_IRQ3 = 45,
SIFIVE_U_PWM1_IRQ0 = 46,
SIFIVE_U_PWM1_IRQ1 = 47,
SIFIVE_U_PWM1_IRQ2 = 48,
SIFIVE_U_PWM1_IRQ3 = 49,
SIFIVE_U_QSPI0_IRQ = 51,
SIFIVE_U_GEM_IRQ = 53
};