scb-init.c
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/*
* 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]);
}
}