Initial revision

1 files changed, 168 insertions, 0 deletions

diff --git a/cpu/mpc8xx/status_led.c b/cpu/mpc8xx/status_led.c
new file mode 100644
index 0000000..d8aaeec
--- /dev/null
+++ b/cpu/mpc8xx/status_led.c
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+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc8xx.h>
+#include <status_led.h>
+
+/*
+ * The purpose of this code is to signal the operational status of a
+ * target which usually boots over the network; while running in
+ * PCBoot, a status LED is blinking. As soon as a valid BOOTP reply
+ * message has been received, the LED is turned off. The Linux
+ * kernel, once it is running, will start blinking the LED again,
+ * with another frequency.
+ */
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_STATUS_LED
+
+typedef struct {
+	ulong	mask;
+	int	state;
+	int	period;
+	int	cnt;
+} led_dev_t;
+
+led_dev_t led_dev[] = {
+    {	STATUS_LED_BIT,
+	STATUS_LED_STATE,
+	STATUS_LED_PERIOD,
+	0,
+    },
+#if defined(STATUS_LED_BIT1)
+    {	STATUS_LED_BIT1,
+	STATUS_LED_STATE1,
+	STATUS_LED_PERIOD1,
+	0,
+    },
+#endif
+#if defined(STATUS_LED_BIT2)
+    {	STATUS_LED_BIT2,
+	STATUS_LED_STATE2,
+	STATUS_LED_PERIOD2,
+	0,
+    },
+#endif
+#if defined(STATUS_LED_BIT3)
+    {	STATUS_LED_BIT3,
+	STATUS_LED_STATE3,
+	STATUS_LED_PERIOD3,
+	0,
+    },
+#endif
+};
+
+#define MAX_LED_DEV	(sizeof(led_dev)/sizeof(led_dev_t))
+
+static int status_led_init_done = 0;
+
+static void status_led_init (void)
+{
+    volatile immap_t *immr = (immap_t *)CFG_IMMR;
+    int i;
+
+    for (i=0; i<MAX_LED_DEV; ++i) {
+	led_dev_t *ld = &led_dev[i];
+
+	immr->STATUS_LED_PAR &= ~(ld->mask);
+#ifdef STATUS_LED_ODR
+	immr->STATUS_LED_ODR &= ~(ld->mask);
+#endif
+#if (STATUS_LED_ACTIVE == 0)
+	if (ld->state == STATUS_LED_ON)
+		immr->STATUS_LED_DAT &= ~(ld->mask);
+	else
+		immr->STATUS_LED_DAT |=   ld->mask ;
+#else
+	if (ld->state == STATUS_LED_ON)
+		immr->STATUS_LED_DAT |=   ld->mask ;
+	else
+		immr->STATUS_LED_DAT &= ~(ld->mask);
+#endif
+	immr->STATUS_LED_DIR |=   ld->mask ;
+    }
+
+    status_led_init_done  = 1;
+}
+
+void status_led_tick (ulong timestamp)
+{
+    volatile immap_t *immr = (immap_t *)CFG_IMMR;
+    int i;
+
+    if (!status_led_init_done)
+	status_led_init();
+
+    for (i=0; i<MAX_LED_DEV; ++i) {
+	led_dev_t *ld = &led_dev[i];
+
+	if (ld->state != STATUS_LED_BLINKING)
+		continue;
+
+	if (++(ld->cnt) >= ld->period) {
+		immr->STATUS_LED_DAT ^= ld->mask;
+		ld->cnt -= ld->period;
+	}
+    }
+}
+
+void status_led_set (int led, int state)
+{
+    volatile immap_t *immr = (immap_t *)CFG_IMMR;
+    led_dev_t *ld;
+
+    if (led < 0 || led >= MAX_LED_DEV)
+	return;
+
+    if (!status_led_init_done)
+	status_led_init();
+
+    ld = &led_dev[led];
+
+    switch (state) {
+    default:
+	return;
+    case STATUS_LED_BLINKING:
+	ld->cnt = 0;		/* always start with full period	*/
+	/* fall through */	/* always start with LED _ON_		*/
+    case STATUS_LED_ON:
+#if (STATUS_LED_ACTIVE == 0)
+	immr->STATUS_LED_DAT &= ~(ld->mask);
+#else
+	immr->STATUS_LED_DAT |=   ld->mask ;
+#endif
+	break;
+    case STATUS_LED_OFF:
+#if (STATUS_LED_ACTIVE == 0)
+	immr->STATUS_LED_DAT |=   ld->mask ;
+#else
+	immr->STATUS_LED_DAT &= ~(ld->mask);
+#endif
+	break;
+    }
+    ld->state = state;
+}
+
+#endif	/* CONFIG_STATUS_LED */