am437x loads pru driver error

vefone

Hi,TI

When I insmod the driver pruss_remoteproc.ko,I got the information below:

[ 93.543791] pruss-rproc 54400000.pruss: creating platform devices for PRU cores
[ 93.563877] platform sound.10: Driver asoc-simple-card requests probe deferral
[ 93.588361] remoteproc1: 54434000.pru0 is available
[ 93.593678] remoteproc1: Note: remoteproc is still under development and considered experimental.
[ 93.603322] remoteproc1: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[ 93.628893] remoteproc1: Direct firmware load failed with error -2
[ 93.635610] remoteproc1: Falling back to user helper
[ 93.647821] remoteproc1: failed to load rproc-pru0-fw
[ 93.653374] pru-rproc 54434000.pru0: booting the PRU core manually
[ 93.660625] remoteproc1: powering up 54434000.pru0
[ 93.665929] remoteproc1: Direct firmware load failed with error -2
[ 93.672687] remoteproc1: Falling back to user helper
[ 93.684204] remoteproc1: request_firmware failed: -2
[ 93.689713] pru-rproc 54434000.pru0: rproc_boot failed
[ 93.696212] remoteproc1: releasing 54434000.pru0
[ 93.701704] pru-rproc: probe of 54434000.pru0 failed with error -2
[ 93.709226] remoteproc1: 54438000.pru1 is available
[ 93.714542] remoteproc1: Note: remoteproc is still under development and considered experimental.
[ 93.724176] remoteproc1: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[ 93.735813] remoteproc1: Direct firmware load failed with error -2
[ 93.742574] remoteproc1: Falling back to user helper
[ 93.755043] remoteproc1: failed to load rproc-pru1-fw
[ 93.760869] pru-rproc 54438000.pru1: booting the PRU core manually
[ 93.767882] remoteproc1: powering up 54438000.pru1
[ 93.773178] remoteproc1: Direct firmware load failed with error -2
[ 93.779935] remoteproc1: Falling back to user helper
[ 93.791473] remoteproc1: request_firmware failed: -2
[ 93.796901] pru-rproc 54438000.pru1: rproc_boot failed
[ 93.803505] remoteproc1: releasing 54438000.pru1
[ 93.808997] pru-rproc: probe of 54438000.pru1 failed with error -2

and I want to know why.

Thanks.

Vefone

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

Please check this wiki pages:

http://processors.wiki.ti.com/index.php/PRU-ICSS_Getting_Started_Guide

http://processors.wiki.ti.com/index.php/PRU-ICSS_Remoteproc_Driver especially:

"The remoteproc driver can be invoked manually by loading it as a module via the insmod command or automatically by building it into the kernel. It will look for firmware in the /lib/firmware directory on the target filesystem by the name rproc-pru0-fw. Once it parses the resource table and loads the firmware into the PRU's memory it will then start the core(s)."

0 vefone over 8 years ago in reply to Biser Gatchev-XID

Expert 2440 points

Hi,

Thanks for your help,and it is helpful.I want to use the am437x pru to light up the led on my board,and the led connects with GPIO5_11.I have finished the assembed code, but I don't know how to write the C code about that.The question is how to use pru to write data to arm memory address,just like GPIO5_11.Could you give me some advice?

Thanks

vefone

0 Biser Gatchev-XID over 8 years ago in reply to vefone

TI__Guru**** 393215 points

Check this thread: https://e2e.ti.com/support/arm/sitara_arm/f/791/t/367637

0 vefone over 8 years ago in reply to vefone

Expert 2440 points

/*
* LEDs Pruss code for tlam437x.
* vefone <vefone2lemon@gmail.com>
* Copyright (C) 2015 Tronlong, Inc.
*
*/

#include <stdint.h>
#include <pru_cfg.h>
#include "resource_table_empty.h"

/* LED port address */
#define GPIO5_BASE_ADDR 0x48322000
#define GPIO_OE_OFFSET 0x134
#define GPIO_CLRDATAOUT_OFFSET 0x190
#define GPIO_SETDATAOUT_OFFSET 0x194

//volatile register uint32_t __R30;

volatile pruCfg CT_CFG __attribute__((cregister("PRU_CFG", near), peripheral));

int main(void) {

uint32_t i;
uint32_t value;

/* GPI Mode 0, GPO Mode 0 */
CT_CFG.GPCFG0 = 0;
/* Clear SYSCFG[STANDBY_INIT] to enable OCP master port */
CT_CFG.SYSCFG_bit.STANDBY_INIT = 0;

uint32_t led_set_addr;
uint32_t led_clr_addr;

led_set_addr = GPIO5_BASE_ADDR + GPIO_SETDATAOUT_OFFSET;
led_clr_addr = GPIO5_BASE_ADDR + GPIO_CLRDATAOUT_OFFSET;

*(uint32_t*)led_clr_addr |= 1<<10; //turn down LED0

while(1) {

for (i = 0; i < 4; i++) {
value = 1<<(i + 10);
*(uint32_t*)led_set_addr |= value;
__delay_cycles(100000000); // half-second delay
*(uint32_t*)led_clr_addr |= value;
__delay_cycles(100000000); // half-second delay
}
}
/* Halt the PRU core - shouldn't get here */
// __halt();
}

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am437x loads pru driver error