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[src/trunk]: src/sys/arch/arm/sunxi sunxihstimer: add support for Allwinner H...
details: https://anonhg.NetBSD.org/src/rev/a9c849b908e3
branches: trunk
changeset: 452010:a9c849b908e3
user: tnn <tnn%NetBSD.org@localhost>
date: Fri Jun 14 21:26:36 2019 +0000
description:
sunxihstimer: add support for Allwinner High-Speed Timer
diffstat:
sys/arch/arm/sunxi/files.sunxi | 7 +-
sys/arch/arm/sunxi/sunxi_hstimer.c | 201 +++++++++++++++++++++++++++++++++++++
2 files changed, 207 insertions(+), 1 deletions(-)
diffs (226 lines):
diff -r 32eaddc035a4 -r a9c849b908e3 sys/arch/arm/sunxi/files.sunxi
--- a/sys/arch/arm/sunxi/files.sunxi Fri Jun 14 16:34:31 2019 +0000
+++ b/sys/arch/arm/sunxi/files.sunxi Fri Jun 14 21:26:36 2019 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.sunxi,v 1.64 2019/05/28 21:56:04 jmcneill Exp $
+# $NetBSD: files.sunxi,v 1.65 2019/06/14 21:26:36 tnn Exp $
#
# Configuration info for Allwinner sunxi family SoCs
#
@@ -204,6 +204,11 @@
attach sunxitimer at fdt with sunxi_timer
file arch/arm/sunxi/sunxi_timer.c sunxi_timer
+# High Speed Timer
+device sunxihstimer
+attach sunxihstimer at fdt with sunxi_hstimer
+file arch/arm/sunxi/sunxi_hstimer.c sunxi_hstimer
+
# Watchdog
device sunxiwdt: sysmon_wdog
attach sunxiwdt at fdt with sunxi_wdt
diff -r 32eaddc035a4 -r a9c849b908e3 sys/arch/arm/sunxi/sunxi_hstimer.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/sunxi/sunxi_hstimer.c Fri Jun 14 21:26:36 2019 +0000
@@ -0,0 +1,201 @@
+/* $NetBSD: sunxi_hstimer.c,v 1.1 2019/06/14 21:26:36 tnn Exp $ */
+
+/*-
+ * Copyright (c) 2019 Tobias Nygren <tnn%NetBSD.org@localhost>
+ * Copyright (c) 2017 Jared 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: sunxi_hstimer.c,v 1.1 2019/06/14 21:26:36 tnn Exp $");
+
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/timetc.h>
+#include <dev/fdt/fdtvar.h>
+
+/* High Speed Timer registers */
+#define HS_TMR_IRQ_EN_REG 0x0
+#define HS_TMR_IRQ_EN(n) __BIT(n)
+#define HS_TMR_IRQ_STAS_REG 0x4
+#define HS_TMR_STAS_PEND(n) __BIT(n)
+#define HS_TMR0_CTRL_REG 0x10
+#define HS_TMR0_CTRL_MODE __BIT(7)
+#define HS_TMR0_CTRL_CLK_PRESCALE __BITS(6,4)
+#define HS_TMR0_CTRL_RELOAD __BIT(1)
+#define HS_TMR0_CTRL_EN __BIT(0)
+#define HS_TMR0_INTV_LO_REG 0x14
+#define HS_TMR0_INTV_HI_REG 0x18
+#define HS_TMR0_CURNT_LO_REG 0x1c
+#define HS_TMR0_CURNT_HI_REG 0x20
+#define HS_TMR1_CTRL_REG 0x30
+#define HS_TMR1_CTRL_MODE __BIT(7)
+#define HS_TMR1_CTRL_CLK_PRESCALE __BITS(6,4)
+#define HS_TMR1_CTRL_RELOAD __BIT(1)
+#define HS_TMR1_CTRL_EN __BIT(0)
+#define HS_TMR1_INTV_LO_REG 0x34
+#define HS_TMR1_INTV_HI_REG 0x38
+#define HS_TMR1_CURNT_LO_REG 0x3c
+#define HS_TMR1_CURNT_HI_REG 0x40
+#define HS_TMR2_CTRL_REG 0x50
+#define HS_TMR2_CTRL_MODE __BIT(7)
+#define HS_TMR2_CTRL_CLK_PRESCALE __BITS(6,4)
+#define HS_TMR2_CTRL_RELOAD __BIT(1)
+#define HS_TMR2_CTRL_EN __BIT(0)
+#define HS_TMR2_INTV_LO_REG 0x54
+#define HS_TMR2_INTV_HI_REG 0x58
+#define HS_TMR2_CURNT_LO_REG 0x5c
+#define HS_TMR2_CURNT_HI_REG 0x60
+#define HS_TMR3_CTRL_REG 0x70
+#define HS_TMR3_CTRL_MODE __BIT(7)
+#define HS_TMR3_CTRL_CLK_PRESCALE __BITS(6,4)
+#define HS_TMR3_CTRL_RELOAD __BIT(1)
+#define HS_TMR3_CTRL_EN __BIT(0)
+#define HS_TMR3_INTV_LO_REG 0x74
+#define HS_TMR3_INTV_HI_REG 0x78
+#define HS_TMR3_CURNT_LO_REG 0x7c
+#define HS_TMR3_CURNT_HI_REG 0x80
+
+static const char * const compatible[] = {
+ "allwinner,sun5i-a13-hstimer",
+ "allwinner,sun6i-a31-hstimer",
+ "allwinner,sun7i-a20-hstimer",
+ NULL
+};
+
+struct sunxi_hstimer_softc {
+ device_t sc_dev;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ int sc_phandle;
+ void *sc_ih;
+ struct timecounter sc_tc;
+};
+
+#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))
+
+static int
+sunxi_hstimer_intr(void *arg)
+{
+ struct sunxi_hstimer_softc *sc = arg;
+ uint32_t stas;
+
+ stas = TIMER_READ(sc, HS_TMR_IRQ_STAS_REG);
+ if (stas == 0)
+ return 0;
+ TIMER_WRITE(sc, HS_TMR_IRQ_STAS_REG, stas);
+
+ return 1;
+}
+
+static u_int
+sunxi_hstimer_get_timecount(struct timecounter *tc)
+{
+ struct sunxi_hstimer_softc *sc = tc->tc_priv;
+
+ /*
+ * Timer current value is a 56-bit down counter.
+ * But we only need the lower 32 bits for timecounter.
+ */
+ return ~TIMER_READ(sc, HS_TMR0_CURNT_LO_REG);
+}
+
+static int
+sunxi_hstimer_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct fdt_attach_args * const faa = aux;
+
+ return of_match_compatible(faa->faa_phandle, compatible);
+}
+
+static void
+sunxi_hstimer_attach(device_t parent, device_t self, void *aux)
+{
+ struct sunxi_hstimer_softc *sc = device_private(self);
+ struct fdt_attach_args *faa = aux;
+ struct timecounter *tc = &sc->sc_tc;
+ const int phandle = faa->faa_phandle;
+ bus_addr_t addr;
+ bus_size_t size;
+ char intrstr[128];
+ struct clk *clk;
+
+ sc->sc_dev = self;
+ sc->sc_phandle = phandle;
+ sc->sc_bst = faa->faa_bst;
+
+ if ((clk = fdtbus_clock_get_index(phandle, 0)) == NULL
+ || clk_enable(clk) != 0) {
+ aprint_error(": couldn't enable clock\n");
+ return;
+ }
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0
+ || bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": couldn't map registers\n");
+ return;
+ }
+
+ aprint_naive("\n");
+ aprint_normal(": High Speed Timer\n");
+
+ /* Disable IRQs and all timers */
+ TIMER_WRITE(sc, HS_TMR_IRQ_EN_REG, 0);
+ TIMER_WRITE(sc, HS_TMR_IRQ_STAS_REG, TIMER_READ(sc, HS_TMR_IRQ_STAS_REG));
+ /* Enable Timer 0 (timecounter) */
+ TIMER_WRITE(sc, HS_TMR0_CTRL_REG, 0);
+ TIMER_WRITE(sc, HS_TMR0_INTV_LO_REG, ~0u);
+ TIMER_WRITE(sc, HS_TMR0_INTV_HI_REG, ~0u);
+ TIMER_WRITE(sc, HS_TMR0_CTRL_REG,
+ HS_TMR0_CTRL_RELOAD | HS_TMR0_CTRL_EN);
+
+ /* Timecounter setup */
+ tc->tc_get_timecount = sunxi_hstimer_get_timecount;
+ tc->tc_counter_mask = ~0u,
+ tc->tc_frequency = clk_get_rate(clk);
+ tc->tc_name = "hstimer";
+ tc->tc_quality = 300;
+ tc->tc_priv = sc;
+ tc_init(tc);
+
+ if (!fdtbus_intr_str(sc->sc_phandle, 0, intrstr, sizeof(intrstr))) {
+ aprint_error_dev(self, "failed to decode interrupt\n");
+ return;
+ }
+ sc->sc_ih = fdtbus_intr_establish(sc->sc_phandle, 0, IPL_CLOCK,
+ FDT_INTR_MPSAFE, sunxi_hstimer_intr, sc);
+ if (sc->sc_ih == NULL) {
+ aprint_error_dev(self, "failed to establish interrupt on %s\n",
+ intrstr);
+ return;
+ }
+ aprint_normal_dev(sc->sc_dev, "interrupting on %s\n", intrstr);
+}
+
+CFATTACH_DECL_NEW(sunxi_hstimer, sizeof(struct sunxi_hstimer_softc),
+ sunxi_hstimer_match, sunxi_hstimer_attach, NULL, NULL);
+
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