RPi5 and hm2_rpspi (I know they are new to market and can be hard to get)

[ozzyrob]

Some initial info here: https://forum.linuxcnc.org/18-computer/50697-rpi5-spi-woes#285681

First thing of note in the driver the second 32 bit value of the RPi5 /proc/device-tree/soc/ranges is 0x10 compared to 0x00 for the RPi4. Hexdump: 7c 00 00 00 00 00 00 10 7c 00 00 00 04 00 00 00

RPi5 with a 7i90 (hostmot firmware running on a Spartan 6 dev board, works fine with my RP-400)

Linuxcnc 2.9 recent pull from git hub Initial play with the code was as such from RIP

if(!pmembase || pmembase ==0x10) {
    // This is (probably) a RPi4 and the ranges file has a zero at
    // the base address. Here we need to read four 32-bit words to
    // get to the right values.
    rtapi_kfree(buf);
    if(!(buf = read_file("/proc/device-tree/soc/ranges", 4095, 16))) {
        rtapi_print_msg(RPSPI_ERR, "hm2_rpspi: Cannot determine IO base address and size.\n");
        return -1;
    }
    pmembase = be32toh(((uint32_t *)buf)[2]);
    pmemsize = be32toh(((uint32_t *)buf)[3]);
}

got a result as such: rmmod: ERROR: Module spi_bcm2835 is not currently loaded hm2_rpspi: ERROR: Failed to execute '/sbin/rmmod spi_bcm2835' hm2_rpspi: Platform: Raspberry Pi 5 Model B Rev 1.0 hm2_rpspi: Base address 7c000000 size 04000000 hm2_rpspi: Mapped peripherals from 0x7c000000 (size 0x04000000) to gpio:0x0x7fff1c1d0000, spi:0x0x7fff1c1d4000, aux:0x0x7fff1c1e5000 hm2_rpspi: No VPU clock at '/sys/kernel/debug/clk/vpu/clk_rate' (errno=2), trying core clock as alternative. hm2_rpspi: SPI0/CE1 clock rate: 31250000/31250000 Hz, VPU clock rate: 50000000 Hz hm2_rpspi: SPI0/CE1 write clock rate calculated: 25000000 Hz (clkdiv=2) hm2_rpspi: SPI0/CE1 read clock rate calculated: 25000000 Hz (clkdiv=2) Then just waiting for component to become ready.

With the unmodified driver from recent deb package.

hm2_rpspi: Platform: Raspberry Pi 5 Model B Rev 1.0 hm2_rpspi: Base address 0x00000010 size 0x7c000000 hm2_rpspi: Can't map peripherals hm2_rpspi: cannot map peripheral memory. hm2_rpspi: rtapi_app_main: Invalid argument (-22)

:2: waitpid failed /usr/bin/rtapi_app hm2_rpspi :2: /usr/bin/rtapi_app exited without becoming ready :2: insmod for hm2_rpspi failed, returned -1 Dir listing of /proc/device-tree/soc if of any use /proc/device-tree/soc $ ls #address-cells' avs-monitor@7d542000 clock@7c700000 compatible cprman@7d202000 dma-ranges fb firmware firmwarekms@7d503000 fixedregulator_3v3 fixedregulator_5v0 gpio@7d508500 gpio@7d517c00 gpiomem@7d504100 gpiomem@7d508500 gpiomem@7d510700 gpiomem@7d517c00 hdmi@7ef00700 hdmi@7ef05700 i2c@7d005000 i2c@7d005600 i2c@7d005800 i2c@7d005a00 i2c@7d005c00 i2c@7d005e00 i2c@7d508200 i2c@7d508280 i2c@7d508300 i2c@7d517a00 i2c@7d544000 _i2s@7d003000 intc@7d503000 intc@7d508380 intc@7d508400 intc@7d517000 intc@7d517ac0 intc@7d517b00 interrupt-controller@7c502000 interrupt-controller@7d510600 local_intc@7cd00000 mailbox@7c013880 mmc@7d002000 mop@7c500000 moplet@7c501000 name phandle pinctrl@7d504100 pinctrl@7d510700 pixelvalve@7c410000 pixelvalve@7c411000 power pwm@7d00c000 pwm@7d00c800 pwm@7d517a80 ranges rng@7d208000 rpi_rtc serial@7d001000 serial@7d001400 serial@7d001600 serial@7d001800 serial@7d001a00 serial@7d50c000 serial@7d50d000 serial@7d50e000 '#size-cells' sound spi@7d004000 spi@7d004600 spi@7d004800 spi@7d004a00 spi@7d004c00 timer@7c003000 usb@7c480000 watchdog@7d200000

[ozzyrob]

Few changes to src/hal/drivers/mesa-hostmot2/spi_common_rpspi.h

define BCM2835_GPIO_OFFSET 0x200000

define BCM2835_SPI_OFFSET 0x204000

define BCM2835_AUX_OFFSET 0x215000

*/

define BCM2835_GPIO_OFFSET 0x1508500

define BCM2835_SPI_OFFSET 0x1004000

define BCM2835_AUX_OFFSET 0x1504100

Yielded this result alcmd: loadrt hm2_rpspi spi_probe=2 spi_debug=4 hm2_rpspi: Platform: Raspberry Pi 5 Model B Rev 1.0 hm2_rpspi: Base address 7c000000 size 04000000 hm2_rpspi: Mapped peripherals from 0x7c000000 (size 0x04000000) to gpio:0x0x7fff894d8500, spi:0x0x7fff88fd4000, aux:0x0x7fff894d4100 hm2_rpspi: No VPU clock at '/sys/kernel/debug/clk/vpu/clk_rate' (errno=2), trying core clock as alternative. hm2_rpspi: SPI0/CE1 clock rate: 31250000/31250000 Hz, VPU clock rate: 50000000 Hz hm2_rpspi: SPI0/CE1 write clock rate calculated: 25000000 Hz (clkdiv=2) hm2_rpspi: SPI0/CE1 read clock rate calculated: 25000000 Hz (clkdiv=2) hm2_rpspi: SPI0/CE1 Invalid cookie, read: 00000000 00000000 00000000, expected: 55aacafe 54534f48 32544f4d hm2_rpspi: SPI0/CE1 No drive seen on MISO line (kept at pull-down level). No board connected or bad connection? hm2_rpspi: rtapi_app_main: No such device (-19)

:2: waitpid failed /home/cnc/linuxcnc-dev/bin/rtapi_app hm2_rpspi :2: /home/cnc/linuxcnc-dev/bin/rtapi_app exited without becoming ready :2: insmod for hm2_rpspi failed, returned -1 I can do a successful mesaflash readhmid /sys/kernel/debug/clk/vpu/clk_rate maybe at /sys/kernel/debug/clk/vpu-clock/clk_rate now

[ozzyrob]

Looks like I'm barking up the wrong tree. So the above was just a hopeful "lets see if it's that simple".

Anyone one have any ideas ?