[src/trunk]: src/sys/arch/arm/allwinner a10/a20 rtc driver

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7e4836f7104f
branches:  trunk
changeset: 332118:7e4836f7104f
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sun Sep 07 17:49:39 2014 +0000

description:
a10/a20 rtc driver

diffstat:

 sys/arch/arm/allwinner/awin_io.c  |    3 +-
 sys/arch/arm/allwinner/awin_reg.h |   23 ++++++
 sys/arch/arm/allwinner/awin_rtc.c |  143 ++++++++++++++++++++++++++++++++++++++
 sys/arch/arm/allwinner/files.awin |    7 +-
 4 files changed, 174 insertions(+), 2 deletions(-)

diffs (221 lines):

diff -r 498f770c9189 -r 7e4836f7104f sys/arch/arm/allwinner/awin_io.c
--- a/sys/arch/arm/allwinner/awin_io.c  Sun Sep 07 15:38:06 2014 +0000
+++ b/sys/arch/arm/allwinner/awin_io.c  Sun Sep 07 17:49:39 2014 +0000
@@ -31,7 +31,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(1, "$NetBSD: awin_io.c,v 1.10 2014/09/06 00:15:34 jmcneill Exp $");
+__KERNEL_RCSID(1, "$NetBSD: awin_io.c,v 1.11 2014/09/07 17:49:39 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -104,6 +104,7 @@
        { "com", OFFANDSIZE(UART6), 6, AWIN_IRQ_UART6, AANY },
        { "com", OFFANDSIZE(UART7), 7, AWIN_IRQ_UART7, AANY },
        { "awinwdt", OFFANDSIZE(TMR), NOPORT, NOINTR, AANY },
+       { "awinrtc", OFFANDSIZE(TMR), NOPORT, NOINTR, AANY },
        { "awinusb", OFFANDSIZE(USB1), 0, NOINTR, AANY },
        { "awinusb", OFFANDSIZE(USB2), 1, NOINTR, AANY },
        { "awinmmc", OFFANDSIZE(SDMMC0), 0, AWIN_IRQ_SDMMC0, AANY },
diff -r 498f770c9189 -r 7e4836f7104f sys/arch/arm/allwinner/awin_reg.h
--- a/sys/arch/arm/allwinner/awin_reg.h Sun Sep 07 15:38:06 2014 +0000
+++ b/sys/arch/arm/allwinner/awin_reg.h Sun Sep 07 17:49:39 2014 +0000
@@ -1326,6 +1326,29 @@
 #define AWIN_WDOG_MODE_RST_EN          __BIT(1)
 #define AWIN_WDOG_MODE_EN              __BIT(0)
 
+#define AWIN_LOSC_CTRL_KEY_FIELD       __BITS(31,16)
+#define AWIN_LOSC_CTRL_CLK32K_AUTO_SWT_PEND __BIT(15)
+#define AWIN_LOSC_CTRL_CLK32K_AUTO_SWT_EN __BIT(14)
+#define AWIN_LOSC_CTRL_ALM_DDHHMMSS_ACCE __BIT(9)
+#define AWIN_LOSC_CTRL_RTC_HHMMSS_ACCE __BIT(8)
+#define AWIN_LOSC_CTRL_RTC_YYMMDD_ACCE __BIT(7)
+#define AWIN_LOSC_CTRL_EXT_LOSC_GSM    __BITS(3,2)
+#define AWIN_LOSC_CTRL_OSC32K_SRC_SEL  __BIT(0)
+#define AWIN_LOSC_CTRL_BUSY \
+       (AWIN_LOSC_CTRL_ALM_DDHHMMSS_ACCE | \
+        AWIN_LOSC_CTRL_RTC_HHMMSS_ACCE | \
+        AWIN_LOSC_CTRL_RTC_YYMMDD_ACCE)
+
+#define AWIN_RTC_YY_MM_DD_RTC_SIM_CTRL __BIT(30)
+#define AWIN_RTC_YY_MM_DD_LEAP         __BIT(24)
+#define AWIN_RTC_YY_MM_DD_YEAR         __BITS(23,16)
+#define AWIN_RTC_YY_MM_DD_MONTH                __BITS(11,8)
+#define AWIN_RTC_YY_MM_DD_DAY          __BITS(4,0)
+#define AWIN_RTC_HH_MM_SS_WK_NO                __BITS(31,29)
+#define AWIN_RTC_HH_MM_SS_HOUR         __BITS(20,16)
+#define AWIN_RTC_HH_MM_SS_MINUTE       __BITS(13,8)
+#define AWIN_RTC_HH_MM_SS_SECOND       __BITS(5,0)
+
 #define AWIN_TWI_ADDR_REG              0x0000
 #define AWIN_TWI_XADDR_REG             0x0004
 #define AWIN_TWI_DATA_REG              0x0008
diff -r 498f770c9189 -r 7e4836f7104f sys/arch/arm/allwinner/awin_rtc.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/allwinner/awin_rtc.c Sun Sep 07 17:49:39 2014 +0000
@@ -0,0 +1,143 @@
+/* $NetBSD: awin_rtc.c,v 1.1 2014/09/07 17:49:39 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2014 Jared D. McNeill <jmcneill%invisible.ca@localhost>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: awin_rtc.c,v 1.1 2014/09/07 17:49:39 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+#include <sys/mutex.h>
+
+#include <arm/allwinner/awin_reg.h>
+#include <arm/allwinner/awin_var.h>
+
+#include <dev/clock_subr.h>
+
+struct awin_rtc_softc {
+       device_t sc_dev;
+       bus_space_tag_t sc_bst;
+       bus_space_handle_t sc_bsh;
+       struct todr_chip_handle sc_todr;
+};
+
+static int     awin_rtc_match(device_t, cfdata_t, void *);
+static void    awin_rtc_attach(device_t, device_t, void *);
+
+static int     awin_rtc_gettime(todr_chip_handle_t, struct clock_ymdhms *);
+static int     awin_rtc_settime(todr_chip_handle_t, struct clock_ymdhms *);
+
+CFATTACH_DECL_NEW(awin_rtc, sizeof(struct awin_rtc_softc),
+       awin_rtc_match, awin_rtc_attach, NULL, NULL);
+
+static int
+awin_rtc_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct awinio_attach_args * const aio = aux;
+       const struct awin_locators * const loc = &aio->aio_loc;
+
+       if (strcmp(cf->cf_name, loc->loc_name))
+               return 0;
+
+       return 1;
+}
+
+static void
+awin_rtc_attach(device_t parent, device_t self, void *aux)
+{
+       struct awin_rtc_softc *sc = device_private(self);
+       struct awinio_attach_args * const aio = aux;
+       const struct awin_locators * const loc = &aio->aio_loc;
+
+       sc->sc_dev = self;
+       sc->sc_bst = aio->aio_core_bst;
+       bus_space_subregion(sc->sc_bst, aio->aio_core_bsh,
+           loc->loc_offset, loc->loc_size, &sc->sc_bsh);
+
+       aprint_naive("\n");
+       aprint_normal(": RTC\n");
+
+       sc->sc_todr.todr_gettime_ymdhms = awin_rtc_gettime;
+       sc->sc_todr.todr_settime_ymdhms = awin_rtc_settime;
+       sc->sc_todr.cookie = sc;
+       todr_attach(&sc->sc_todr);
+}
+
+static int
+awin_rtc_gettime(todr_chip_handle_t tch, struct clock_ymdhms *dt)
+{
+       struct awin_rtc_softc *sc = tch->cookie;
+       uint32_t yymmdd, hhmmss;
+
+       yymmdd = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
+           AWIN_RTC_YY_MM_DD_REG);
+       hhmmss = bus_space_read_4(sc->sc_bst, sc->sc_bsh,
+           AWIN_RTC_HH_MM_SS_REG);
+
+       dt->dt_year = __SHIFTOUT(yymmdd, AWIN_RTC_YY_MM_DD_YEAR) +
+           POSIX_BASE_YEAR;
+       dt->dt_mon = __SHIFTOUT(yymmdd, AWIN_RTC_YY_MM_DD_MONTH);
+       dt->dt_day = __SHIFTOUT(yymmdd, AWIN_RTC_YY_MM_DD_DAY);
+       dt->dt_wday = __SHIFTOUT(hhmmss, AWIN_RTC_HH_MM_SS_WK_NO);
+       dt->dt_hour = __SHIFTOUT(hhmmss, AWIN_RTC_HH_MM_SS_HOUR);
+       dt->dt_min = __SHIFTOUT(hhmmss, AWIN_RTC_HH_MM_SS_MINUTE);
+       dt->dt_sec = __SHIFTOUT(hhmmss, AWIN_RTC_HH_MM_SS_SECOND);
+
+       return 0;
+}
+
+static int
+awin_rtc_settime(todr_chip_handle_t tch, struct clock_ymdhms *dt)
+{
+       struct awin_rtc_softc *sc = tch->cookie;
+       uint32_t yymmdd, hhmmss, losc;
+
+       losc = bus_space_read_4(sc->sc_bst, sc->sc_bsh, AWIN_LOSC_CTRL_REG);
+       if (losc & AWIN_LOSC_CTRL_BUSY)
+               return EBUSY;
+
+       yymmdd = 0;
+       yymmdd |= __SHIFTIN(dt->dt_year - POSIX_BASE_YEAR,
+           AWIN_RTC_YY_MM_DD_YEAR);
+       yymmdd |= __SHIFTIN(dt->dt_mon, AWIN_RTC_YY_MM_DD_MONTH);
+       yymmdd |= __SHIFTIN(dt->dt_day, AWIN_RTC_YY_MM_DD_DAY);
+       hhmmss = 0;
+       hhmmss |= __SHIFTIN(dt->dt_wday, AWIN_RTC_HH_MM_SS_WK_NO);
+       hhmmss |= __SHIFTIN(dt->dt_hour, AWIN_RTC_HH_MM_SS_HOUR);
+       hhmmss |= __SHIFTIN(dt->dt_min, AWIN_RTC_HH_MM_SS_MINUTE);
+       hhmmss |= __SHIFTIN(dt->dt_sec, AWIN_RTC_HH_MM_SS_SECOND);
+
+       bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_RTC_YY_MM_DD_REG,
+           yymmdd);
+       bus_space_write_4(sc->sc_bst, sc->sc_bsh, AWIN_RTC_HH_MM_SS_REG,
+           hhmmss);
+
+       return 0;
+}
diff -r 498f770c9189 -r 7e4836f7104f sys/arch/arm/allwinner/files.awin
--- a/sys/arch/arm/allwinner/files.awin Sun Sep 07 15:38:06 2014 +0000
+++ b/sys/arch/arm/allwinner/files.awin Sun Sep 07 17:49:39 2014 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.awin,v 1.10 2014/09/06 00:15:34 jmcneill Exp $
+#      $NetBSD: files.awin,v 1.11 2014/09/07 17:49:39 jmcneill Exp $
 #
 # Configuration info for Allwinner ARM Peripherals
 #
@@ -42,6 +42,11 @@
 attach awinwdt at awinio with awin_wdt
 file   arch/arm/allwinner/awin_wdt.c           awin_wdt | awin_io needs-flag
 
+# A10/A20 RTC
+device awinrtc
+attach awinrtc at awinio with awin_rtc
+file   arch/arm/allwinner/awin_rtc.c           awin_rtc
+
 # A10 Timers
 device awintmr
 attach awintmr at awinio with awin_tmr