diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/serial/opencores_yanu.c | 49 |
1 files changed, 9 insertions, 40 deletions
diff --git a/drivers/serial/opencores_yanu.c b/drivers/serial/opencores_yanu.c index 80e9ae5..d4ed60c 100644 --- a/drivers/serial/opencores_yanu.c +++ b/drivers/serial/opencores_yanu.c @@ -18,62 +18,34 @@ DECLARE_GLOBAL_DATA_PTR; static yanu_uart_t *uart = (yanu_uart_t *)CONFIG_SYS_NIOS_CONSOLE; -#if defined(CONFIG_SYS_NIOS_FIXEDBAUD) - -/* Everything's already setup for fixed-baud PTF assignment*/ - static void oc_serial_setbrg(void) { int n, k; const unsigned max_uns = 0xFFFFFFFF; unsigned best_n, best_m, baud; + unsigned baudrate; - /* compute best N and M couple */ - best_n = YANU_MAX_PRESCALER_N; - for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) { - if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >= - (unsigned)CONFIG_BAUDRATE) { - best_n = n; - break; - } - } - for (k = 0;; k++) { - if ((unsigned)CONFIG_BAUDRATE <= (max_uns >> (15+n-k))) - break; - } - best_m = - ((unsigned)CONFIG_BAUDRATE * (1 << (15 + n - k))) / - ((unsigned)CONFIG_SYS_CLK_FREQ >> k); - - baud = best_m + best_n * YANU_BAUDE; - writel(baud, &uart->baud); - - return; -} - +#if defined(CONFIG_SYS_NIOS_FIXEDBAUD) + /* Everything's already setup for fixed-baud PTF assignment */ + baudrate = CONFIG_BAUDRATE; #else - -static void oc_serial_setbrg(void) -{ - int n, k; - const unsigned max_uns = 0xFFFFFFFF; - unsigned best_n, best_m, baud; - + baudrate = gd->baudrate; +#endif /* compute best N and M couple */ best_n = YANU_MAX_PRESCALER_N; for (n = YANU_MAX_PRESCALER_N; n >= 0; n--) { if ((unsigned)CONFIG_SYS_CLK_FREQ / (1 << (n + 4)) >= - gd->baudrate) { + baudrate) { best_n = n; break; } } for (k = 0;; k++) { - if (gd->baudrate <= (max_uns >> (15+n-k))) + if (baudrate <= (max_uns >> (15+n-k))) break; } best_m = - (gd->baudrate * (1 << (15 + n - k))) / + (baudrate * (1 << (15 + n - k))) / ((unsigned)CONFIG_SYS_CLK_FREQ >> k); baud = best_m + best_n * YANU_BAUDE; @@ -82,9 +54,6 @@ static void oc_serial_setbrg(void) return; } - -#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */ - static int oc_serial_init(void) { unsigned action,control; |