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[src/trunk]: src/sys/arch Add a meson6_timer driver and provide a timecounter



details:   https://anonhg.NetBSD.org/src/rev/4e29e26c4429
branches:  trunk
changeset: 964734:4e29e26c4429
user:      skrll <skrll%NetBSD.org@localhost>
date:      Wed Aug 14 15:08:53 2019 +0000

description:
Add a meson6_timer driver and provide a timecounter

diffstat:

 sys/arch/arm/amlogic/files.meson    |    7 +-
 sys/arch/arm/amlogic/meson6_timer.c |  162 ++++++++++++++++++++++++++++++++++++
 sys/arch/evbarm/conf/GENERIC        |    3 +-
 3 files changed, 170 insertions(+), 2 deletions(-)

diffs (205 lines):

diff -r 0f33637982e3 -r 4e29e26c4429 sys/arch/arm/amlogic/files.meson
--- a/sys/arch/arm/amlogic/files.meson  Wed Aug 14 13:58:00 2019 +0000
+++ b/sys/arch/arm/amlogic/files.meson  Wed Aug 14 15:08:53 2019 +0000
@@ -1,4 +1,4 @@
-#      $NetBSD: files.meson,v 1.9 2019/04/21 13:51:04 jmcneill Exp $
+#      $NetBSD: files.meson,v 1.10 2019/08/14 15:08:53 skrll Exp $
 #
 # Configuration info for Amlogic Meson family SoCs
 #
@@ -114,6 +114,11 @@
 attach mesongxwdt at fdt with mesongx_wdt
 file   arch/arm/amlogic/mesongx_wdt.c          mesongx_wdt
 
+# Meson Timers
+device meson6timer
+attach meson6timer at fdt with meson6_timer
+file   arch/arm/amlogic/meson6_timer.c         meson6_timer
+
 # SOC parameters
 defflag        opt_soc.h                       SOC_MESON
 defflag        opt_soc.h                       SOC_MESON8B: SOC_MESON
diff -r 0f33637982e3 -r 4e29e26c4429 sys/arch/arm/amlogic/meson6_timer.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/amlogic/meson6_timer.c       Wed Aug 14 15:08:53 2019 +0000
@@ -0,0 +1,162 @@
+/*     $NetBSD: meson6_timer.c,v 1.1 2019/08/14 15:08:53 skrll Exp $   */
+
+/*-
+ * Copyright (c) 2019 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nick Hudson
+ *
+ * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``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 FOUNDATION OR CONTRIBUTORS
+ * 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: meson6_timer.c,v 1.1 2019/08/14 15:08:53 skrll Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/timetc.h>
+
+#include <dev/fdt/fdtvar.h>
+
+static int     meson6_timer_match(device_t, cfdata_t, void *);
+static void    meson6_timer_attach(device_t, device_t, void *);
+
+struct meson6_timer_softc {
+       device_t                sc_dev;
+       bus_space_tag_t         sc_bst;
+       bus_space_handle_t      sc_bsh;
+
+       struct timecounter sc_tc;
+};
+
+CFATTACH_DECL_NEW(meson6_timer, sizeof(struct meson6_timer_softc),
+    meson6_timer_match, meson6_timer_attach, NULL, NULL);
+
+#define TIMER_READ(sc, reg)                    \
+    bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define TIMER_WRITE(sc, reg, val)              \
+    bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+#define MESON_TIMER_MUX                                        0x00
+#define  MESON_TIMER_MUX_TIMERD_EN                     __BIT(19)
+#define  MESON_TIMER_MUX_TIMERC_EN                     __BIT(18)
+#define  MESON_TIMER_MUX_TIMERB_EN                     __BIT(17)
+#define  MESON_TIMER_MUX_TIMERA_EN                     __BIT(16)
+#define  MESON_TIMER_MUX_TIMERD_MODE                   __BIT(15)
+#define  MESON_TIMER_MUX_TIMERC_MODE                   __BIT(14)
+#define  MESON_TIMER_MUX_TIMERB_MODE                   __BIT(13)
+#define  MESON_TIMER_MUX_TIMERA_MODE                   __BIT(12)
+#define  MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_MASK       __BITS(10, 8)
+#define   MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_SYSTEM_CLOCK      0x0
+#define   MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_1US               0x1
+#define   MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_10US              0x2
+#define   MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_100US             0x3
+#define   MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_1MS               0x4
+#define  MESON_TIMER_MUX_TIMERD_INPUT_CLOCK_MASK       __BITS(7, 6)
+#define  MESON_TIMER_MUX_TIMERC_INPUT_CLOCK_MASK       __BITS(5, 4)
+#define  MESON_TIMER_MUX_TIMERB_INPUT_CLOCK_MASK       __BITS(3, 2)
+#define  MESON_TIMER_MUX_TIMERA_INPUT_CLOCK_MASK       __BITS(1, 0)
+#define   MESON_TIMER_MUX_TIMERABCD_INPUT_CLOCK_1US            0x0
+#define   MESON_TIMER_MUX_TIMERABCD_INPUT_CLOCK_10US           0x1
+#define   MESON_TIMER_MUX_TIMERABCD_INPUT_CLOCK_100US          0x2
+#define   MESON_TIMER_MUX_TIMERABCD_INPUT_CLOCK_1MS            0x3
+
+#define MESON_TIMERA                                   0x04
+#define MESON_TIMERB                                   0x08
+#define MESON_TIMERC                                   0x0c
+#define MESON_TIMERD                                   0x10
+#define MESON_TIMERE                                   0x14
+
+static u_int
+meson6_timer_get_timecount(struct timecounter *tc)
+{
+       struct meson6_timer_softc * const sc = tc->tc_priv;
+
+       return TIMER_READ(sc, MESON_TIMERE);
+}
+
+
+static int
+meson6_timer_match(device_t parent, cfdata_t cf, void *aux)
+{
+       const char * const compatible[] = {
+           "amlogic,meson6-timer",
+           NULL
+       };
+       struct fdt_attach_args * const faa = aux;
+
+       return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+meson6_timer_attach(device_t parent, device_t self, void *aux)
+{
+       struct meson6_timer_softc * const sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       const int phandle = faa->faa_phandle;
+       bus_addr_t addr;
+       bus_size_t size;
+
+       if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+               aprint_error(": couldn't get registers\n");
+               return;
+       }
+
+       sc->sc_dev = self;
+       sc->sc_bst = faa->faa_bst;
+       if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+               aprint_error(": couldn't map registers\n");
+               return;
+       }
+
+       /* Enable clocks */
+       struct clk *clk;
+       for (int i = 0; (clk = fdtbus_clock_get_index(phandle, i)); i++) {
+               if (clk_enable(clk) != 0) {
+                       aprint_error(": failed to enable clock #%d\n", i);
+                       return;
+               }
+       }
+
+       aprint_naive("\n");
+       aprint_normal(": Timers\n");
+
+       uint32_t mask = TIMER_READ(sc, MESON_TIMER_MUX);
+       mask &= ~MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_MASK;
+       mask |= __SHIFTIN(MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_1US, MESON_TIMER_MUX_TIMERE_INPUT_CLOCK_MASK);
+
+       TIMER_WRITE(sc, MESON_TIMER_MUX, mask);
+
+       /* Timecounter setup */
+       struct timecounter *tc = &sc->sc_tc;
+       tc->tc_get_timecount = meson6_timer_get_timecount;
+       tc->tc_counter_mask = ~0u;
+       tc->tc_frequency = 1000000;
+       tc->tc_name = "Timer E";
+       tc->tc_quality = 500;
+       tc->tc_priv = sc;
+       tc_init(tc);
+}
+
diff -r 0f33637982e3 -r 4e29e26c4429 sys/arch/evbarm/conf/GENERIC
--- a/sys/arch/evbarm/conf/GENERIC      Wed Aug 14 13:58:00 2019 +0000
+++ b/sys/arch/evbarm/conf/GENERIC      Wed Aug 14 15:08:53 2019 +0000
@@ -1,5 +1,5 @@
 #
-#      $NetBSD: GENERIC,v 1.50 2019/08/13 09:56:09 skrll Exp $
+#      $NetBSD: GENERIC,v 1.51 2019/08/14 15:08:53 skrll Exp $
 #
 #      GENERIC ARM (aarch32) kernel
 #
@@ -306,6 +306,7 @@
 armgtmr0       at gtmr?
 mct*           at fdt? pass 2          # Exynos Multi Core Timer (MCT)
 armgtmr*       at mct?
+meson6timer*   at fdt?                 # Amlogic Timer
 sunxitimer*    at fdt?                 # Allwinner async timer
 sunxihstimer*  at fdt?                 # Allwinner High-Speed timer
 tegratimer*    at fdt?                 # Timers



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