[ot] hw/opentitan: ot_usbdev: Initial implementation of the block

Signed-off-by: Douglas Reis <[email protected]>
Signed-off-by: Amaury Pouly <[email protected]>

Author: engdoreis

docs/opentitan/earlgrey.md

@@ -269,6 +269,13 @@ There are two modes to handle address remapping, with different limitations:
 * `-device <name>,bus=<bus>,address=<address>` can be used to attach devices at a specific address
   to one of the three I2C buses. The buses are named `ot-i2c0`, `ot-i2c1`, and `ot-i2c2`.
 
+### USBDEV
+
+* `-chardev pty,id=usbdev` can be used to connect to the usbdev driver.
+* `-global ot-usbdev.vbus-mode=<mode>` can be used to select the VBUS mode.
+
+See the [USBDEV documentation](usbdev.md)] for more details.
+
 ## Useful debugging options
 
 ### Device log traces

hw/opentitan/Kconfig

@@ -191,6 +191,9 @@ config OT_TIMER
 config OT_UART
     bool
 
+config OT_USBDEV
+    bool
+
 config OT_UNIMP
     bool
 

hw/opentitan/meson.build

@@ -61,3 +61,4 @@ system_ss.add(when: 'CONFIG_OT_UNIMP', if_true: files('ot_unimp.c'))
 riscv_ss.add(when: 'CONFIG_OT_VMAPPER', if_true: files('ot_vmapper.c'))
 
 subdir('otbn')
+subdir('usbdev')

hw/opentitan/trace-events

@@ -629,6 +629,14 @@ ot_uart_io_read_out(const char *id, uint32_t addr, const char *regname, uint32_t
 ot_uart_io_write(const char *id, uint32_t addr, const char *regname, uint32_t val, uint32_t pc) "%s: addr=0x%02x (%s), val=0x%x, pc=0x%x"
 ot_uart_irqs(const char *id, uint32_t active, uint32_t mask, uint32_t eff) "%s: act:0x%08x msk:0x%08x eff:0x%08x"
 
+# ot_usbdev.c
+
+ot_usbdev_io_read_out(const char *id, uint32_t addr, const char *regname, uint32_t val, uint32_t pc) "%s: addr=0x%02x (%s), val=0x%x, pc=0x%x"
+ot_usbdev_io_write(const char *id, uint32_t addr, const char *regname, uint32_t val, uint32_t pc) "%s: addr=0x%02x (%s), val=0x%x, pc=0x%x"
+ot_usbdev_irqs(const char *id, uint32_t active, uint32_t mask, uint32_t eff) "%s: act:0x%08x msk:0x%08x eff:0x%08x"
+ot_usbdev_reset(const char *id, const char *stage) "%s: %s"
+ot_usbdev_chr_process_cmd(const char *id, const char *cmd) "%s: %s"
+
 # ot_unimp.c
 
 ot_unimp_irq(const char *id, unsigned ix, bool lvl) "%s: #%u = %u"