Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / drivers / rtc / mpc5xxx.c

diff --git a/qemu/roms/u-boot/drivers/rtc/mpc5xxx.c b/qemu/roms/u-boot/drivers/rtc/mpc5xxx.c
new file mode 100644 (file)
index 0000000..929783e
--- /dev/null
+++ b/qemu/roms/u-boot/drivers/rtc/mpc5xxx.c
@@ -0,0 +1,128 @@
+/*
+ * (C) Copyright 2004
+ * Reinhard Meyer, EMK Elektronik GmbH
+ * r.meyer@emk-elektronik.de
+ * www.emk-elektronik.de
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+/*****************************************************************************
+ * Date & Time support for internal RTC of MPC52xx
+ *****************************************************************************/
+/*#define      DEBUG*/
+
+#include <common.h>
+#include <command.h>
+#include <rtc.h>
+
+#if defined(CONFIG_CMD_DATE)
+
+/*****************************************************************************
+ * this structure should be defined in mpc5200.h ...
+ *****************************************************************************/
+typedef struct rtc5200 {
+       volatile ulong  tsr;    /* MBAR+0x800: time set register */
+       volatile ulong  dsr;    /* MBAR+0x804: data set register */
+       volatile ulong  nysr;   /* MBAR+0x808: new year and stopwatch register */
+       volatile ulong  aier;   /* MBAR+0x80C: alarm and interrupt enable register */
+       volatile ulong  ctr;    /* MBAR+0x810: current time register */
+       volatile ulong  cdr;    /* MBAR+0x814: current data register */
+       volatile ulong  asir;   /* MBAR+0x818: alarm and stopwatch interrupt register */
+       volatile ulong  piber;  /* MBAR+0x81C: periodic interrupt and bus error register */
+       volatile ulong  trdr;   /* MBAR+0x820: test register/divides register */
+} RTC5200;
+
+#define        RTC_SET         0x02000000
+#define        RTC_PAUSE       0x01000000
+
+/*****************************************************************************
+ * get time
+ *****************************************************************************/
+int rtc_get (struct rtc_time *tmp)
+{
+       RTC5200 *rtc = (RTC5200 *) (CONFIG_SYS_MBAR+0x800);
+       ulong time, date, time2;
+
+       /* read twice to avoid getting a funny time when the second is just changing */
+       do {
+               time = rtc->ctr;
+               date = rtc->cdr;
+               time2 = rtc->ctr;
+       } while (time != time2);
+
+       tmp->tm_year    = date & 0xfff;
+       tmp->tm_mon             = (date >> 24) & 0xf;
+       tmp->tm_mday    = (date >> 16) & 0x1f;
+       tmp->tm_wday    = (date >> 21) & 7;
+       /* sunday is 7 in 5200 but 0 in rtc_time */
+       if (tmp->tm_wday == 7)
+               tmp->tm_wday = 0;
+       tmp->tm_hour    = (time >> 16) & 0x1f;
+       tmp->tm_min             = (time >> 8) & 0x3f;
+       tmp->tm_sec             = time & 0x3f;
+
+       debug ( "Get DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+               tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+               tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+       return 0;
+}
+
+/*****************************************************************************
+ * set time
+ *****************************************************************************/
+int rtc_set (struct rtc_time *tmp)
+{
+       RTC5200 *rtc = (RTC5200 *) (CONFIG_SYS_MBAR+0x800);
+       ulong time, date, year;
+
+       debug ( "Set DATE: %4d-%02d-%02d (wday=%d)  TIME: %2d:%02d:%02d\n",
+               tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
+               tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
+
+       time = (tmp->tm_hour << 16) | (tmp->tm_min << 8) | tmp->tm_sec;
+       date = (tmp->tm_mon << 16) | tmp->tm_mday;
+       if (tmp->tm_wday == 0)
+               date |= (7 << 8);
+       else
+               date |= (tmp->tm_wday << 8);
+       year = tmp->tm_year;
+
+       /* mask unwanted bits that might show up when rtc_time is corrupt */
+       time &= 0x001f3f3f;
+       date &= 0x001f071f;
+       year &= 0x00000fff;
+
+       /* pause and set the RTC */
+       rtc->nysr = year;
+       rtc->dsr = date | RTC_PAUSE;
+       udelay (1000);
+       rtc->dsr = date | RTC_PAUSE | RTC_SET;
+       udelay (1000);
+       rtc->dsr = date | RTC_PAUSE;
+       udelay (1000);
+       rtc->dsr = date;
+       udelay (1000);
+
+       rtc->tsr = time | RTC_PAUSE;
+       udelay (1000);
+       rtc->tsr = time | RTC_PAUSE | RTC_SET;
+       udelay (1000);
+       rtc->tsr = time | RTC_PAUSE;
+       udelay (1000);
+       rtc->tsr = time;
+       udelay (1000);
+
+       return 0;
+}
+
+/*****************************************************************************
+ * reset rtc circuit
+ *****************************************************************************/
+void rtc_reset (void)
+{
+       return; /* nothing to do */
+}
+
+#endif