This commit introduces a rudimentary architecture and board port for the
MIPS Creator CI20, featuring the dual core Ingenic JZ4780 SoC (MIPS32).
Included in this initial implementation:
- Basic architectural initialization and startup code for the JZ4780 Core 0.
- Minimal configuration required to execute from RAM.
- Early UART/serial console support for basic debugging and NSH output.
- Minimal board-specific configuration for the CI20 target.
- Console output is routed via UART0 on the expansion header.
This establishes basic support for running NuttX on the MIPS CI20.
Further peripherals, optimization, and extended documentation are left for
future iterations or community contributions.
Build and Runtime Deployment Info:
----------------------------------
The baseline can be configured, compiled using the MIPS MTI toolchain,
and loaded via U-Boot using the following commands (replace
<tftp_dir> with your local TFTP root directory).
./tools/configure.sh -l ci20/nsh
make CROSSDEV=mips-mti-elf-
mkimage -A mips -O linux -T kernel -C none -a 0x80000180 -e 0x800004ac \
-n "nx" -d nuttx.bin <tftp_dir>/nuttx.umg
Note: U-Boot must be properly configured for networking (e.g., valid ipaddr,
serverip, and ethaddr environment variables) to fetch the image over TFTP.
Run this from U-Boot prompt:
tftp nuttx.umg && bootm $fileaddr
Signed-off-by: Lwazi Dube <lwazeh@gmail.com>
Adjust the generic 16550 driver for the AM62x console path. Preserve
the FIFO programming sequence needed by the TI UART, keep the bootloader
owned early console state when requested, and drain the transmit buffer
correctly when polling mode is enabled.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
debug.h is a NuttX-specific, non-POSIX header. Placing it in the
top-level include/ directory creates naming conflicts with external
projects that define their own debug.h.
This commit moves the canonical header to include/nuttx/debug.h,
following the NuttX convention for non-POSIX/non-standard headers,
and updates all in-tree references.
A backward-compatibility shim is left at include/debug.h that
emits a deprecation #warning and re-includes <nuttx/debug.h>,
allowing out-of-tree code to continue building while migrating.
Signed-off-by: Piyush Patle <piyushpatle228@gmail.com>
Adds CONFIG_16550_POLLING options to enable polling mode for
transmission. This avoids TX interrupts and reduces interrupt latency
at the cost of blocking during TX.
Implements sendbuf() method for efficient buffer transmission
in polling mode.
Signed-off-by: yinshengkai <yinshengkai@bytedance.com>
Signed-off-by: chao an <anchao.archer@bytedance.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
This patch fixed userspace headers conflict. Architecture-related definition and API should not be exposed to users.
Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
prepare 16550 UART driver to support PCI:
- [breaking change] change argument of uart_ioctl() from `struct file *filep` to `FAR struct u16550_s *priv`
Also fix moxart_16550.c build related to this change
- [breaking change] change argument of uart_getreg() and uart_putreg from `uart_addrwidth_t base` to `FAR struct u16550_s *priv`
Also fix arch/x86/src/qemu/qemu_serial.c and arch/x86_64/src/intel64/intel64_serial.c related to this change
- [breaking change] change argument of uart_dmachan() from `uart_addrwidth_t base` to `FAR struct u16550_s *priv`
- move `struct u16550_s` to public header
- generalize UART_XXX_OFFSET so we can use it with any register increment
- make u16550_bind(), u16550_interrupt(), u16550_interrupt() public
- remove arch/or1k/src/common/or1k_uart.c and use common 16550 MIMO interfacve
- change irq type in `struct u16550_s` from uint8_t to int to match MSI API
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
move MCR_OUT2 configuration from qemu-intel64/src/qemu_boot.c to common code
also leave this option disabled for qemu-intel64 as it's not required
Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>
Some UART Controllers (Synopsys DesignWare 8250) will trigger spurious interrupts when the Line Control Register (LCR) is set while the UART is busy. This patch provides the option (16550_WAIT_LCR) to wait for UART until it's not busy, before setting the LCR. (16550_WAIT_LCR is disabled by default)
This patch fixes the spurious UART interrupts for the upcoming port of NuttX to StarFive JH7110 SoC (with Synopsys DesignWare 8250 UART). [The patch is explained here](https://lupyuen.github.io/articles/plic#appendix-fix-the-spurious-uart-interrupts)
drivers/serial/uart_16550.c: If 16550_WAIT_LCR is enabled, wait until UART is not busy before setting LCR
include/nuttx/serial/uart_16550.h: Define the UART Status Register (USR) for checking if UART is busy
drivers/serial/Kconfig-16550: Added option 16550_WAIT_LCR to 16550 UART Config, disabled by default
All interrupts must be disabled to prevent re-entrancy and to prevent
interrupts from firing in the serial driver code.
Signed-off-by: hujun5 <hujun5@xiaomi.com>
* Simplify EINTR/ECANCEL error handling
1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx
* Unify the void cast usage
1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
drivers/serial/uart_16550.c: Support 16550 auto hardware flow control
drivers/serial/uart_16550.c: Add configuration option CONFIG_16550_SUPRESS_INITIAL_CONFIG. This is identical to the standard configuration in arch/Kconfig CONFIG_SUPPRESS_UART_CONFIG, but with scope of only the 16550 driver.
drivers/serial/uart_16550.c: Add a configuration, analogous to the STM32 configuration option, to suppress the NuttX standard re-ordering for /dev/ttySN for special case of the 16550 UART.
config/serial: UART 16550: Add CONFIG_SERIAL_UART_ARCH_MMIO option so the a memory mapped device doesn't need to provide uart_getreg() and uart_putreg() implementations.
u16550_txempty() should check UART_LSR_TEMT to avoid some data left in the transmit FIFO
configs/z80sim and xtrs: Serial driver lower halfs ioctl methods should return a negated errno value, not set the errno variable.
drivers/wireless: CC1101 driver not permitted to set errno.
drivers/sensors: LIS331DL driver not permitted to set errno.
drivers/lcd: ILI9341 initialize method not permitted to set errno,
drivers/serial: 16550 UART driver IOCTL method must not set errno; it must return a negated errno value.
Provide a user defined callback context for irq's, such that when
registering a callback users can provide a pointer that will get
passed back when the isr is called.
