projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 76316a31 MS |
2 | /* |
| 3 | * (C) Copyright 2007 Michal Simek | |
| 4 | * | |
| 5 | * Michal SIMEK <[email protected]> | |
| 76316a31 MS |
6 | */ |
| 7 | ||
| 8 | #include <common.h> | |
| 9aa65cab | 9 | #include <fdtdec.h> |
| 76316a31 | 10 | #include <asm/microblaze_timer.h> |
| 42efed61 | 11 | #include <asm/microblaze_intc.h> |
| 76316a31 | 12 | |
| 9aa65cab MS |
13 | DECLARE_GLOBAL_DATA_PTR; |
| 14 | ||
| 76316a31 | 15 | volatile int timestamp = 0; |
| bcbb046b | 16 | microblaze_timer_t *tmr; |
| 76316a31 | 17 | |
| 76316a31 MS |
18 | ulong get_timer (ulong base) |
| 19 | { | |
| bcbb046b MS |
20 | if (tmr) |
| 21 | return timestamp - base; | |
| 22 | return timestamp++ - base; | |
| 76316a31 MS |
23 | } |
| 24 | ||
| 779bf42c MS |
25 | void __udelay(unsigned long usec) |
| 26 | { | |
| bcbb046b | 27 | u32 i; |
| 779bf42c | 28 | |
| bcbb046b MS |
29 | if (tmr) { |
| 30 | i = get_timer(0); | |
| 31 | while ((get_timer(0) - i) < (usec / 1000)) | |
| 32 | ; | |
| bcbb046b | 33 | } |
| 779bf42c | 34 | } |
| 779bf42c | 35 | |
| 9d242745 | 36 | #ifndef CONFIG_SPL_BUILD |
| bcbb046b | 37 | static void timer_isr(void *arg) |
| 76316a31 MS |
38 | { |
| 39 | timestamp++; | |
| 40 | tmr->control = tmr->control | TIMER_INTERRUPT; | |
| 41 | } | |
| 42 | ||
| 5bbcb6cf | 43 | int timer_init (void) |
| 76316a31 | 44 | { |
| bcbb046b MS |
45 | int irq = -1; |
| 46 | u32 preload = 0; | |
| 47 | u32 ret = 0; | |
| 9aa65cab MS |
48 | const void *blob = gd->fdt_blob; |
| 49 | int node = 0; | |
| 50 | u32 cell[2]; | |
| 51 | ||
| 52 | debug("TIMER: Initialization\n"); | |
| 53 | ||
| 54 | node = fdt_node_offset_by_compatible(blob, node, | |
| 55 | "xlnx,xps-timer-1.00.a"); | |
| 56 | if (node != -1) { | |
| 57 | fdt_addr_t base = fdtdec_get_addr(blob, node, "reg"); | |
| 58 | if (base == FDT_ADDR_T_NONE) | |
| 59 | return -1; | |
| 60 | ||
| 61 | debug("TIMER: Base addr %lx\n", base); | |
| 62 | tmr = (microblaze_timer_t *)base; | |
| 63 | ||
| 64 | ret = fdtdec_get_int_array(blob, node, "interrupts", | |
| 65 | cell, ARRAY_SIZE(cell)); | |
| 66 | if (ret) | |
| 67 | return ret; | |
| 68 | ||
| 69 | irq = cell[0]; | |
| 70 | debug("TIMER: IRQ %x\n", irq); | |
| 71 | ||
| 72 | preload = fdtdec_get_int(blob, node, "clock-frequency", 0); | |
| 73 | preload /= CONFIG_SYS_HZ; | |
| 74 | } else { | |
| 75 | return node; | |
| 76 | } | |
| 77 | ||
| bcbb046b MS |
78 | if (tmr && preload && irq >= 0) { |
| 79 | tmr->loadreg = preload; | |
| 80 | tmr->control = TIMER_INTERRUPT | TIMER_RESET; | |
| 81 | tmr->control = TIMER_ENABLE | TIMER_ENABLE_INTR |\ | |
| 82 | TIMER_RELOAD | TIMER_DOWN_COUNT; | |
| 83 | timestamp = 0; | |
| 84 | ret = install_interrupt_handler (irq, timer_isr, (void *)tmr); | |
| 85 | if (ret) | |
| 86 | tmr = NULL; | |
| 87 | } | |
| bcbb046b | 88 | /* No problem if timer is not found/initialized */ |
| 5bbcb6cf | 89 | return 0; |
| 76316a31 | 90 | } |
| 9d242745 MS |
91 | #else |
| 92 | int timer_init(void) | |
| 93 | { | |
| 94 | return 0; | |
| 95 | } | |
| 96 | #endif | |
| b9f0b730 SL |
97 | |
| 98 | /* | |
| 99 | * This function is derived from PowerPC code (read timebase as long long). | |
| 100 | * On Microblaze it just returns the timer value. | |
| 101 | */ | |
| 102 | unsigned long long get_ticks(void) | |
| 103 | { | |
| 104 | return get_timer(0); | |
| 105 | } | |
| 106 | ||
| 107 | /* | |
| 108 | * This function is derived from PowerPC code (timebase clock frequency). | |
| 109 | * On Microblaze it returns the number of timer ticks per second. | |
| 110 | */ | |
| 111 | ulong get_tbclk(void) | |
| 112 | { | |
| 113 | return CONFIG_SYS_HZ; | |
| 114 | } |