Can you please share your config.txt for Pi3. Thanks, Niteesh
On Sun, Feb 16, 2020 at 9:58 PM Alan Cudmore <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> wrote: > > > > On Sun, Feb 16, 2020 at 8:37 PM Alan Cudmore <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> > 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> > 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 > >> > http://lists.rtems.org/mailman/listinfo/devel >
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