/*
|
* arch/blackfin/mach-common/scb-init.c - reprogram system cross bar priority
|
*
|
* Copyright 2012 Analog Devices Inc.
|
*
|
* Licensed under the GPL-2 or later.
|
*/
|
|
#include <linux/errno.h>
|
#include <linux/kernel.h>
|
#include <asm/scb.h>
|
|
__attribute__((l1_text))
|
inline void scb_mi_write(unsigned long scb_mi_arbw, unsigned int slots,
|
unsigned char *scb_mi_prio)
|
{
|
unsigned int i;
|
|
for (i = 0; i < slots; ++i)
|
bfin_write32(scb_mi_arbw, (i << SCB_SLOT_OFFSET) | scb_mi_prio[i]);
|
}
|
|
__attribute__((l1_text))
|
inline void scb_mi_read(unsigned long scb_mi_arbw, unsigned int slots,
|
unsigned char *scb_mi_prio)
|
{
|
unsigned int i;
|
|
for (i = 0; i < slots; ++i) {
|
bfin_write32(scb_mi_arbw, (0xFF << SCB_SLOT_OFFSET) | i);
|
scb_mi_prio[i] = bfin_read32(scb_mi_arbw);
|
}
|
}
|
|
__attribute__((l1_text))
|
void init_scb(void)
|
{
|
unsigned int i, j;
|
unsigned char scb_tmp_prio[32];
|
|
pr_info("Init System Crossbar\n");
|
for (i = 0; scb_data[i].scb_mi_arbr > 0; ++i) {
|
|
scb_mi_write(scb_data[i].scb_mi_arbw, scb_data[i].scb_mi_slots, scb_data[i].scb_mi_prio);
|
|
pr_debug("scb priority at 0x%lx:\n", scb_data[i].scb_mi_arbr);
|
scb_mi_read(scb_data[i].scb_mi_arbw, scb_data[i].scb_mi_slots, scb_tmp_prio);
|
for (j = 0; j < scb_data[i].scb_mi_slots; ++j)
|
pr_debug("slot %d = %d\n", j, scb_tmp_prio[j]);
|
}
|
|
}
|
