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+/*
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+ * (C) Copyright 2000
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+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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+ *
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+ * See file CREDITS for list of people who contributed to this
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+ * project.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License as
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+ * published by the Free Software Foundation; either version 2 of
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+ * the License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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+ * MA 02111-1307 USA
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+ */
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+
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+#include <common.h>
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+#include <mpc8xx.h>
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+#include <status_led.h>
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+
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+/*
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+ * The purpose of this code is to signal the operational status of a
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+ * target which usually boots over the network; while running in
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+ * PCBoot, a status LED is blinking. As soon as a valid BOOTP reply
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+ * message has been received, the LED is turned off. The Linux
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+ * kernel, once it is running, will start blinking the LED again,
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+ * with another frequency.
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+ */
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+
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+/* ------------------------------------------------------------------------- */
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+
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+#ifdef CONFIG_STATUS_LED
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+
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+typedef struct {
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+ ulong mask;
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+ int state;
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+ int period;
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+ int cnt;
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+} led_dev_t;
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+
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+led_dev_t led_dev[] = {
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+ { STATUS_LED_BIT,
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+ STATUS_LED_STATE,
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+ STATUS_LED_PERIOD,
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+ 0,
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+ },
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+#if defined(STATUS_LED_BIT1)
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+ { STATUS_LED_BIT1,
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+ STATUS_LED_STATE1,
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+ STATUS_LED_PERIOD1,
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+ 0,
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+ },
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+#endif
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+#if defined(STATUS_LED_BIT2)
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+ { STATUS_LED_BIT2,
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+ STATUS_LED_STATE2,
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+ STATUS_LED_PERIOD2,
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+ 0,
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+ },
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+#endif
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+#if defined(STATUS_LED_BIT3)
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+ { STATUS_LED_BIT3,
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+ STATUS_LED_STATE3,
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+ STATUS_LED_PERIOD3,
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+ 0,
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+ },
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+#endif
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+};
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+
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+#define MAX_LED_DEV (sizeof(led_dev)/sizeof(led_dev_t))
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+
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+static int status_led_init_done = 0;
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+
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+static void status_led_init (void)
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+{
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+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
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+ int i;
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+
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+ for (i=0; i<MAX_LED_DEV; ++i) {
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+ led_dev_t *ld = &led_dev[i];
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+
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+ immr->STATUS_LED_PAR &= ~(ld->mask);
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+#ifdef STATUS_LED_ODR
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+ immr->STATUS_LED_ODR &= ~(ld->mask);
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+#endif
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+#if (STATUS_LED_ACTIVE == 0)
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+ if (ld->state == STATUS_LED_ON)
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+ immr->STATUS_LED_DAT &= ~(ld->mask);
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+ else
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+ immr->STATUS_LED_DAT |= ld->mask ;
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+#else
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+ if (ld->state == STATUS_LED_ON)
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+ immr->STATUS_LED_DAT |= ld->mask ;
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+ else
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+ immr->STATUS_LED_DAT &= ~(ld->mask);
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+#endif
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+ immr->STATUS_LED_DIR |= ld->mask ;
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+ }
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+
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+ status_led_init_done = 1;
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+}
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+
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+void status_led_tick (ulong timestamp)
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+{
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+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
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+ int i;
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+
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+ if (!status_led_init_done)
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+ status_led_init();
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+
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+ for (i=0; i<MAX_LED_DEV; ++i) {
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+ led_dev_t *ld = &led_dev[i];
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+
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+ if (ld->state != STATUS_LED_BLINKING)
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+ continue;
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+
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+ if (++(ld->cnt) >= ld->period) {
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+ immr->STATUS_LED_DAT ^= ld->mask;
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+ ld->cnt -= ld->period;
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+ }
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+ }
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+}
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+
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+void status_led_set (int led, int state)
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+{
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+ volatile immap_t *immr = (immap_t *)CFG_IMMR;
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+ led_dev_t *ld;
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+
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+ if (led < 0 || led >= MAX_LED_DEV)
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+ return;
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+
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+ if (!status_led_init_done)
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+ status_led_init();
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+
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+ ld = &led_dev[led];
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+
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+ switch (state) {
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+ default:
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+ return;
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+ case STATUS_LED_BLINKING:
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+ ld->cnt = 0; /* always start with full period */
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+ /* fall through */ /* always start with LED _ON_ */
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+ case STATUS_LED_ON:
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+#if (STATUS_LED_ACTIVE == 0)
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+ immr->STATUS_LED_DAT &= ~(ld->mask);
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+#else
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+ immr->STATUS_LED_DAT |= ld->mask ;
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+#endif
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+ break;
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+ case STATUS_LED_OFF:
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+#if (STATUS_LED_ACTIVE == 0)
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+ immr->STATUS_LED_DAT |= ld->mask ;
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+#else
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+ immr->STATUS_LED_DAT &= ~(ld->mask);
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+#endif
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+ break;
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+ }
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+ ld->state = state;
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+}
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+
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+#endif /* CONFIG_STATUS_LED */
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wdenk