1/*
2 * arch/blackfin/mach-common/scb-init.c - reprogram system cross bar priority
3 *
4 * Copyright 2012 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2 or later.
7 */
8
9#include <linux/errno.h>
10#include <linux/kernel.h>
11#include <asm/scb.h>
12
13__attribute__((l1_text))
14inline void scb_mi_write(unsigned long scb_mi_arbw, unsigned int slots,
15		unsigned char *scb_mi_prio)
16{
17	unsigned int i;
18
19	for (i = 0; i < slots; ++i)
20		bfin_write32(scb_mi_arbw, (i << SCB_SLOT_OFFSET) | scb_mi_prio[i]);
21}
22
23__attribute__((l1_text))
24inline void scb_mi_read(unsigned long scb_mi_arbw, unsigned int slots,
25		unsigned char *scb_mi_prio)
26{
27	unsigned int i;
28
29	for (i = 0; i < slots; ++i) {
30		bfin_write32(scb_mi_arbw, (0xFF << SCB_SLOT_OFFSET) | i);
31		scb_mi_prio[i] = bfin_read32(scb_mi_arbw);
32	}
33}
34
35__attribute__((l1_text))
36void init_scb(void)
37{
38	unsigned int i, j;
39	unsigned char scb_tmp_prio[32];
40
41	pr_info("Init System Crossbar\n");
42	for (i = 0; scb_data[i].scb_mi_arbr > 0; ++i) {
43
44		scb_mi_write(scb_data[i].scb_mi_arbw, scb_data[i].scb_mi_slots, scb_data[i].scb_mi_prio);
45
46		pr_debug("scb priority at 0x%lx:\n", scb_data[i].scb_mi_arbr);
47		scb_mi_read(scb_data[i].scb_mi_arbw, scb_data[i].scb_mi_slots, scb_tmp_prio);
48		for (j = 0; j < scb_data[i].scb_mi_slots; ++j)
49			pr_debug("slot %d = %d\n", j, scb_tmp_prio[j]);
50	}
51
52}
53