Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / misc / status_led.c

diff --git a/qemu/roms/u-boot/drivers/misc/status_led.c b/qemu/roms/u-boot/drivers/misc/status_led.c
new file mode 100644 (file)
index 0000000..ed9adb2
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/misc/status_led.c
@@ -0,0 +1,111 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.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
+ * U-Boot, 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.
+ */
+
+/* ------------------------------------------------------------------------- */
+
+typedef struct {
+       led_id_t 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)
+{
+       led_dev_t *ld;
+       int i;
+
+       for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++)
+               __led_init (ld->mask, ld->state);
+       status_led_init_done = 1;
+}
+
+void status_led_tick (ulong timestamp)
+{
+       led_dev_t *ld;
+       int i;
+
+       if (!status_led_init_done)
+               status_led_init ();
+
+       for (i = 0, ld = led_dev; i < MAX_LED_DEV; i++, ld++) {
+
+               if (ld->state != STATUS_LED_BLINKING)
+                       continue;
+
+               if (++ld->cnt >= ld->period) {
+                       __led_toggle (ld->mask);
+                       ld->cnt -= ld->period;
+               }
+
+       }
+}
+
+void status_led_set (int led, int state)
+{
+       led_dev_t *ld;
+
+       if (led < 0 || led >= MAX_LED_DEV)
+               return;
+
+       if (!status_led_init_done)
+               status_led_init ();
+
+       ld = &led_dev[led];
+
+       ld->state = state;
+       if (state == STATUS_LED_BLINKING) {
+               ld->cnt = 0;            /* always start with full period    */
+               state = STATUS_LED_ON;  /* always start with LED _ON_       */
+       }
+       __led_set (ld->mask, state);
+}