projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 24a70cf2 SM |
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 | ||
| 24a70cf2 SM |
9 | #include <linux/errno.h> |
| 10 | #include <linux/kernel.h> | |
| 11 | #include <asm/scb.h> | |
| 12 | ||
| 13 | __attribute__((l1_text)) | |
| 14 | inline 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)) | |
| 24 | inline 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)) | |
| 36 | void 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 | } |