Awesome! The Pi Zero W is a bonus too! I think we can run RTEMS on all models except the Pi 4 now.
On Sun, Feb 16, 2020 at 12:30 PM G. S. Niteesh <gsnb...@gmail.com> wrote: > > Hii Alan, > > I tested it on my Raspberry Pi 3 model b v1.2 and it works. > U-Boot is not required anymore :) > > Thanks, > Niteesh. > > On Sun, Feb 16, 2020 at 10:51 PM Alan Cudmore <alan.cudm...@gmail.com> wrote: >> >> I'm definitely using the kernel_address, but letting the firmware >> decide what image to boot. For me kernel.img is the single core ARM >> images. kernel7.img is used for the raspberry pi 2 and 3. With these >> names, I can have both images on the same SD card to test in all of my >> Pis. >> >> >> my config.txt: >> enable_uart=1 >> kernel_address=0x200000 >> >> >> On Sun, Feb 16, 2020 at 11:44 AM Christian Mauderer <l...@c-mauderer.de> >> wrote: >> > >> > On 16/02/2020 17:31, G. S. Niteesh wrote: >> > > Can you please share your config.txt for Pi3. >> > >> > +1 >> > >> > It's interesting that it seems to work without an adapted config.txt. It >> > should be at least necessary to define the start address. >> > >> > > >> > > Thanks, >> > > Niteesh >> > > >> > > On Sun, Feb 16, 2020 at 9:58 PM Alan Cudmore <alan.cudm...@gmail.com >> > > <mailto:alan.cudm...@gmail.com>> wrote: >> > > >> > > I tried running my raspberrypi BSP image that worked on the Pi Zero >> > > and W, but it did not work on the Pi 3. >> > > >> > > I built the raspberrypi2 BSP, used objcopy to copy the binary to my >> > > sd >> > > card as kernel7.img, and it works on my Pi 3 and Pi3 A+ ( without >> > > ethernet) . Note that my config.txt file does not specify the kernel >> > > image, so the firmware defaults to kernel.img for the single core >> > > models and kernel7.img for the 2 and 3. >> > > >> > > I probably wont get a chance to try u-boot until later today or >> > > tomorrow. >> > > >> > > But these patches are great for enabling the Pi Zero W and Pi 3 >> > > models! >> > > Thanks, >> > > Alan >> > > >> > > On Sun, Feb 16, 2020 at 10:58 AM G. S. Niteesh <gsnb...@gmail.com >> > > <mailto:gsnb...@gmail.com>> wrote: >> > > > >> > > > On Sun, Feb 16, 2020 at 8:37 PM Alan Cudmore >> > > <alan.cudm...@gmail.com <mailto:alan.cudm...@gmail.com>> wrote: >> > > >> >> > > >> Hi Niteesh, >> > > >> I can try this patch on my Pi 3. Which BSP should I use? Is there >> > > any >> > > >> special setup or BSP configuration needed? >> > > >> Thanks, >> > > >> Alan >> > > > >> > > > Hi Alan, >> > > > First of all, thank you for taking this initiative. >> > > > I have tried using the default bootloader in Pi3 to load RTEMS but >> > > it doesn't work, >> > > > Can you try it? >> > > > The currently use U-Boot in 32bit mode as the bootloader. >> > > > You can use the below instructions to build U-Boot in 32bit mode >> > > > >> > > > git clone https://github.com/u-boot/u-boot.git u-boot >> > > > cd u-boot >> > > > git revert 995eab8b5b580b67394312b1621c60a71042cd18 >> > > > make CROSS_COMPILE=arm-linux-gnueabi- rpi_3_32b_defconfig >> > > > make CROSS_COMPILE=arm-linux-gnueabi- >> > > > >> > > > This one uses an old version of U-Boot and I don't know if there is >> > > > a new way to build in 32bit mode. >> > > > >> > > > To build the U-Boot image of RTEMS you can use the below >> > > instructions >> > > > >> > > > arm-rtems5-objcopy -Obinary hello.exe kernel.img >> > > > mkimage -A arm -O linux -T kernel -a 0x200000 -e 0x200080 -d >> > > kernel.img -C none rtems.img >> > > > >> > > > To load and run in U-Boot >> > > > >> > > > fatload mmc 0 0x200000 rtems.img >> > > > fatload mmc 0 0x1000 bcm2710-rpi-3-b.dtb >> > > > bootm 0x200000 - 0x1000 >> > > > >> > > > And to make your U-Boot build process simpler I have uploaded my >> > > u-boot.bin >> > > > to my github, please use it :) >> > > > https://github.com/gs-niteesh/rpi3_RTEMS >> > > > >> > > > And sorry for the delay, I tested all these instructions again >> > > before sending them. >> > > > >> > > > Thanks >> > > > Niteesh. >> > > > >> > > > On Sun, Feb 16, 2020 at 2:35 AM G. S. Niteesh <gsnb...@gmail.com >> > > <mailto:gsnb...@gmail.com>> wrote: >> > > >> >> > > >> > >> > > >> > Hii, >> > > >> > This is a reminder message since this patch has been unnoticed >> > > for a while. >> > > >> > I have tested it on Raspberry Pi 3 and it works fine. There is >> > > also another patch >> > > >> > >> > > https://lists.rtems.org/pipermail/devel/2020-February/057194.html, >> > > please >> > > >> > do have a look at these. >> > > >> > >> > > >> > Thank you. >> > > >> > Niteesh >> > > >> > On Mon, Feb 10, 2020 at 12:52 AM G S Niteesh <gsnb...@gmail.com >> > > <mailto:gsnb...@gmail.com>> wrote: >> > > >> >> >> > > >> >> This patch adds driver for Mini UART present in Raspberry Pi 3 >> > > >> >> and above, this UART is currently used as the primary UART in >> > > >> >> these models. >> > > >> >> The Mini UART is similar to ns16550, this driver is built >> > > >> >> upon libchip/ns16550. >> > > >> >> --- >> > > >> >> bsps/arm/raspberrypi/console/console-config.c | 118 >> > > ++++++++++++++++-- >> > > >> >> bsps/arm/raspberrypi/include/bsp/usart.h | 1 + >> > > >> >> 2 files changed, 110 insertions(+), 9 deletions(-) >> > > >> >> >> > > >> >> diff --git a/bsps/arm/raspberrypi/console/console-config.c >> > > b/bsps/arm/raspberrypi/console/console-config.c >> > > >> >> index 48c4c6a3ec..62196786dd 100644 >> > > >> >> --- a/bsps/arm/raspberrypi/console/console-config.c >> > > >> >> +++ b/bsps/arm/raspberrypi/console/console-config.c >> > > >> >> @@ -24,6 +24,7 @@ >> > > >> >> >> > > >> >> #include <libchip/serial.h> >> > > >> >> #include <libfdt.h> >> > > >> >> +#include <libchip/ns16550.h> >> > > >> >> >> > > >> >> #include <bspopts.h> >> > > >> >> #include <bsp/usart.h> >> > > >> >> @@ -34,35 +35,103 @@ >> > > >> >> #include <bsp/console-termios.h> >> > > >> >> #include <bsp/fdt.h> >> > > >> >> #include <bsp/fatal.h> >> > > >> >> +#include <bsp/gpio.h> >> > > >> >> +#include <bsp/rpi-gpio.h> >> > > >> >> >> > > >> >> - >> > > >> >> -#define UART0 "/dev/ttyS0" >> > > >> >> +/** >> > > >> >> + * UART0 - PL011 >> > > >> >> + * UART1 - Mini UART >> > > >> >> + */ >> > > >> >> +#define PL011 "/dev/ttyAMA0" >> > > >> >> +#define MINIUART "/dev/ttyS0" >> > > >> >> #define FBCONS "/dev/fbcons" >> > > >> >> >> > > >> >> arm_pl011_context pl011_context; >> > > >> >> +ns16550_context mini_uart_context; >> > > >> >> >> > > >> >> rpi_fb_context fb_context; >> > > >> >> >> > > >> >> -static void output_char_serial(char c) >> > > >> >> +static void output_char_pl011(char c) >> > > >> >> { >> > > >> >> arm_pl011_write_polled(&pl011_context.base, c); >> > > >> >> } >> > > >> >> >> > > >> >> +static void output_char_mini_uart(char c) >> > > >> >> +{ >> > > >> >> + ns16550_polled_putchar(&mini_uart_context.base, c); >> > > >> >> +} >> > > >> >> + >> > > >> >> void output_char_fb(char c) >> > > >> >> { >> > > >> >> fbcons_write_polled(&fb_context.base, c); >> > > >> >> } >> > > >> >> >> > > >> >> +static uint8_t mini_uart_get_reg(uintptr_t port, uint8_t >> > > index) >> > > >> >> +{ >> > > >> >> + volatile uint32_t *val = (volatile uint32_t *)port + index; >> > > >> >> + return (uint8_t) *val; >> > > >> >> +} >> > > >> >> + >> > > >> >> +static void mini_uart_set_reg(uintptr_t port, uint8_t index, >> > > uint8_t val) >> > > >> >> +{ >> > > >> >> + volatile uint32_t *reg = (volatile uint32_t *)port + index; >> > > >> >> + *reg = val; >> > > >> >> +} >> > > >> >> + >> > > >> >> static void init_ctx_arm_pl011( >> > > >> >> const void *fdt, >> > > >> >> int node >> > > >> >> ) >> > > >> >> { >> > > >> >> arm_pl011_context *ctx = &pl011_context; >> > > >> >> - rtems_termios_device_context_initialize(&ctx->base, "UART"); >> > > >> >> + rtems_termios_device_context_initialize(&ctx->base, >> > > "PL011UART"); >> > > >> >> ctx->regs = raspberrypi_get_reg_of_node(fdt, node); >> > > >> >> } >> > > >> >> >> > > >> >> +static uint32_t calculate_baud_divisor( >> > > >> >> + ns16550_context *ctx, >> > > >> >> + uint32_t baud >> > > >> >> +) >> > > >> >> +{ >> > > >> >> + uint32_t baudDivisor = (ctx->clock / (8 * baud)) - 1; >> > > >> >> + return baudDivisor; >> > > >> >> +} >> > > >> >> + >> > > >> >> +static void init_ctx_mini_uart( >> > > >> >> + const void *fdt, >> > > >> >> + int node >> > > >> >> +) >> > > >> >> +{ >> > > >> >> + const char *status; >> > > >> >> + int len; >> > > >> >> + ns16550_context *ctx; >> > > >> >> + >> > > >> >> + memset(&mini_uart_context, 0, sizeof(mini_uart_context)); >> > > >> >> + ctx = &mini_uart_context; >> > > >> >> + >> > > >> >> + rtems_termios_device_context_initialize(&ctx->base, >> > > "MiniUART"); >> > > >> >> + >> > > >> >> + status = fdt_getprop(fdt, node, "status", &len); >> > > >> >> + if ( status == NULL || strcmp(status, "disabled" ) == 0){ >> > > >> >> + return ; >> > > >> >> + } >> > > >> >> + >> > > >> >> + ctx->port = (uintptr_t) raspberrypi_get_reg_of_node(fdt, >> > > node); >> > > >> >> + ctx->initial_baud = MINI_UART_DEFAULT_BAUD; >> > > >> >> + ctx->clock = BCM2835_CLOCK_FREQ; >> > > >> >> + ctx->calculate_baud_divisor = calculate_baud_divisor; >> > > >> >> + ctx->get_reg = mini_uart_get_reg; >> > > >> >> + ctx->set_reg = mini_uart_set_reg; >> > > >> >> + >> > > >> >> + rtems_gpio_bsp_select_specific_io(0, 14, RPI_ALT_FUNC_5, >> > > NULL); >> > > >> >> + rtems_gpio_bsp_select_specific_io(0, 15, RPI_ALT_FUNC_5, >> > > NULL); >> > > >> >> + rtems_gpio_bsp_set_resistor_mode(0, 14, NO_PULL_RESISTOR); >> > > >> >> + rtems_gpio_bsp_set_resistor_mode(0, 15, NO_PULL_RESISTOR); >> > > >> >> + >> > > >> >> + BCM2835_REG(AUX_ENABLES) |= 0x1; >> > > >> >> + ns16550_probe(&ctx->base); >> > > >> >> +} >> > > >> >> + >> > > >> >> static void register_fb( void ) >> > > >> >> { >> > > >> >> if (fbcons_probe(&fb_context.base) == true) { >> > > >> >> @@ -87,16 +156,28 @@ static void console_select( void ) >> > > >> >> link(FBCONS, CONSOLE_DEVICE_NAME); >> > > >> >> return ; >> > > >> >> } >> > > >> >> + } else if ( strncmp( opt, MINIUART, sizeof(MINIUART) - 1 >> > > ) == 0) { >> > > >> >> + BSP_output_char = output_char_mini_uart; >> > > >> >> + link(MINIUART, CONSOLE_DEVICE_NAME); >> > > >> >> + } else if ( strncmp( opt, PL011, sizeof(PL011) - 1 ) == >> > > 0) { >> > > >> >> + BSP_output_char = output_char_pl011; >> > > >> >> + link(PL011, CONSOLE_DEVICE_NAME); >> > > >> >> } >> > > >> >> + }else { >> > > >> >> + /** >> > > >> >> + * If no command line option was given, default to PL011. >> > > >> >> + */ >> > > >> >> + BSP_output_char = output_char_pl011; >> > > >> >> + link(PL011, CONSOLE_DEVICE_NAME); >> > > >> >> } >> > > >> >> - BSP_output_char = output_char_serial; >> > > >> >> - link(UART0, CONSOLE_DEVICE_NAME); >> > > >> >> } >> > > >> >> >> > > >> >> static void uart_probe(void) >> > > >> >> { >> > > >> >> static bool initialized = false; >> > > >> >> const void *fdt; >> > > >> >> + const char *console; >> > > >> >> + int len; >> > > >> >> int node; >> > > >> >> >> > > >> >> if ( initialized ) { >> > > >> >> @@ -104,17 +185,29 @@ static void uart_probe(void) >> > > >> >> } >> > > >> >> >> > > >> >> fdt = bsp_fdt_get(); >> > > >> >> - node = fdt_node_offset_by_compatible(fdt, -1, >> > > "brcm,bcm2835-pl011"); >> > > >> >> >> > > >> >> + node = fdt_node_offset_by_compatible(fdt, -1, >> > > "brcm,bcm2835-pl011"); >> > > >> >> init_ctx_arm_pl011(fdt, node); >> > > >> >> >> > > >> >> + node = fdt_node_offset_by_compatible(fdt, -1, >> > > "brcm,bcm2835-aux-uart"); >> > > >> >> + init_ctx_mini_uart(fdt, node); >> > > >> >> + >> > > >> >> + node = fdt_path_offset(fdt, "/aliases"); >> > > >> >> + console = fdt_getprop(fdt, node, "serial0", &len); >> > > >> >> + >> > > >> >> + if ( strcmp(console, "/soc/serial@7e215040" ) == 0) { >> > > >> >> + BSP_output_char = output_char_mini_uart; >> > > >> >> + }else { >> > > >> >> + BSP_output_char = output_char_pl011; >> > > >> >> + } >> > > >> >> + >> > > >> >> initialized = true; >> > > >> >> } >> > > >> >> >> > > >> >> static void output_char(char c) >> > > >> >> { >> > > >> >> uart_probe(); >> > > >> >> - output_char_serial(c); >> > > >> >> + (*BSP_output_char)(c); >> > > >> >> } >> > > >> >> >> > > >> >> rtems_status_code console_initialize( >> > > >> >> @@ -127,12 +220,19 @@ rtems_status_code console_initialize( >> > > >> >> >> > > >> >> uart_probe(); >> > > >> >> rtems_termios_device_install( >> > > >> >> - UART0, >> > > >> >> + PL011, >> > > >> >> &arm_pl011_fns, >> > > >> >> NULL, >> > > >> >> &pl011_context.base >> > > >> >> ); >> > > >> >> >> > > >> >> + rtems_termios_device_install( >> > > >> >> + MINIUART, >> > > >> >> + &ns16550_handler_polled, >> > > >> >> + NULL, >> > > >> >> + &mini_uart_context.base >> > > >> >> + ); >> > > >> >> + >> > > >> >> register_fb(); >> > > >> >> >> > > >> >> console_select(); >> > > >> >> diff --git a/bsps/arm/raspberrypi/include/bsp/usart.h >> > > b/bsps/arm/raspberrypi/include/bsp/usart.h >> > > >> >> index abbf53626c..6af1844b3c 100644 >> > > >> >> --- a/bsps/arm/raspberrypi/include/bsp/usart.h >> > > >> >> +++ b/bsps/arm/raspberrypi/include/bsp/usart.h >> > > >> >> @@ -33,6 +33,7 @@ extern "C" { >> > > >> >> #endif /* __cplusplus */ >> > > >> >> >> > > >> >> #define PL011_DEFAULT_BAUD 115000 >> > > >> >> +#define MINI_UART_DEFAULT_BAUD 115200 >> > > >> >> #define BCM2835_PL011_BASE (RPI_PERIPHERAL_BASE + 0x201000) >> > > >> >> >> > > >> >> #ifdef __cplusplus >> > > >> >> -- >> > > >> >> 2.17.1 >> > > >> >> >> > > >> > _______________________________________________ >> > > >> > devel mailing list >> > > >> > devel@rtems.org <mailto:devel@rtems.org> >> > > >> > http://lists.rtems.org/mailman/listinfo/devel >> > > >> > > >> > > _______________________________________________ >> > > devel mailing list >> > > devel@rtems.org >> > > http://lists.rtems.org/mailman/listinfo/devel >> > > _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
