[src/trunk]: src/sys/arch/arm/fdt Add fdt glue for ARM PrimeCell UART (PL011).

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

details:   https://anonhg.NetBSD.org/src/rev/8fb34806bb7c
branches:  trunk
changeset: 354050:8fb34806bb7c
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Fri Jun 02 14:30:58 2017 +0000

description:
Add fdt glue for ARM PrimeCell UART (PL011).

diffstat:

 sys/arch/arm/fdt/files.fdt   |    5 +-
 sys/arch/arm/fdt/plcom_fdt.c |  146 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 150 insertions(+), 1 deletions(-)

diffs (169 lines):

diff -r e9693df90af7 -r 8fb34806bb7c sys/arch/arm/fdt/files.fdt
--- a/sys/arch/arm/fdt/files.fdt        Fri Jun 02 13:53:28 2017 +0000
+++ b/sys/arch/arm/fdt/files.fdt        Fri Jun 02 14:30:58 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.6 2017/06/02 11:04:01 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.7 2017/06/02 14:30:58 jmcneill Exp $
 
 device armfdt { }: bus_space_generic, fdtbus
 attach armfdt at root with arm_fdt
@@ -15,6 +15,9 @@
 attach  gic at fdt with gic_fdt
 file    arch/arm/fdt/gic_fdt.c                 gic_fdt
 
+attach plcom at fdt with plcom_fdt
+file   arch/arm/fdt/plcom_fdt.c                plcom_fdt
+
 attach plmmc at fdt with plmmc_fdt
 file   arch/arm/fdt/plmmc_fdt.c                plmmc_fdt
 
diff -r e9693df90af7 -r 8fb34806bb7c sys/arch/arm/fdt/plcom_fdt.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/fdt/plcom_fdt.c      Fri Jun 02 14:30:58 2017 +0000
@@ -0,0 +1,146 @@
+/* $NetBSD: plcom_fdt.c,v 1.1 2017/06/02 14:30:58 jmcneill Exp $ */
+
+/*-
+ * 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: plcom_fdt.c,v 1.1 2017/06/02 14:30:58 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <evbarm/dev/plcomreg.h>
+#include <evbarm/dev/plcomvar.h>
+
+static int     plcom_fdt_match(device_t, cfdata_t, void *);
+static void    plcom_fdt_attach(device_t, device_t, void *);
+
+static const char * const compatible[] = { "arm,pl011", NULL };
+
+CFATTACH_DECL_NEW(plcom_fdt, sizeof(struct plcom_softc),
+       plcom_fdt_match, plcom_fdt_attach, NULL, NULL);
+
+static int
+plcom_fdt_match(device_t parent, cfdata_t cf, void *aux)
+{
+       struct fdt_attach_args * const faa = aux;
+
+       return of_compatible(faa->faa_phandle, compatible) >= 0;
+}
+
+static void
+plcom_fdt_attach(device_t parent, device_t self, void *aux)
+{
+       struct plcom_softc * const sc = device_private(self);
+       struct fdt_attach_args * const faa = aux;
+       const int phandle = faa->faa_phandle;
+       struct clk *clk;
+       bus_addr_t addr;
+       bus_size_t size;
+       void *ih;
+
+       if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+               aprint_error(": missing 'reg' property\n");
+               return;
+       }
+
+       sc->sc_dev = self;
+
+       /* Enable clocks */
+       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;
+               }
+               /* First clock is UARTCLK */
+               if (i == 0)
+                       sc->sc_frequency = clk_get_rate(clk);
+       }
+
+       sc->sc_hwflags = PLCOM_HW_TXFIFO_DISABLE;
+       sc->sc_swflags = 0;
+
+       sc->sc_pi.pi_type = PLCOM_TYPE_PL011;
+       sc->sc_pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
+       sc->sc_pi.pi_iot = faa->faa_bst;
+       sc->sc_pi.pi_iobase = addr;
+       if (bus_space_map(faa->faa_bst, addr, size, 0, &sc->sc_pi.pi_ioh)) {
+               aprint_error(": couldn't map device\n");
+               return;
+       }
+       plcom_attach_subr(sc);
+
+       ih = fdtbus_intr_establish(phandle, 0, IPL_SERIAL, FDT_INTR_MPSAFE,
+           plcomintr, sc);
+       if (ih == NULL) {
+               aprint_error_dev(self, "couldn't install interrupt handler\n");
+               return;
+       }
+}
+
+static int
+plcom_fdt_console_match(int phandle)
+{
+       return of_match_compatible(phandle, compatible);
+}
+
+static void
+plcom_fdt_console_consinit(struct fdt_attach_args *faa, u_int uart_freq)
+{
+       static struct plcom_instance pi;
+       bus_addr_t addr;
+       bus_size_t size;
+       tcflag_t flags;
+       int speed;
+
+       if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0)
+               return;
+
+       pi.pi_type = PLCOM_TYPE_PL011;
+       pi.pi_flags = PLC_FLAG_32BIT_ACCESS;
+       pi.pi_iot = faa->faa_bst;
+       pi.pi_iobase = addr;
+       pi.pi_size = size;
+
+       speed = fdtbus_get_stdout_speed();
+       if (speed < 0)
+               speed = 115200;
+       flags = fdtbus_get_stdout_flags();
+
+       plcomcnattach(&pi, speed, uart_freq, flags, -1);
+}
+
+static const struct fdt_console plcom_fdt_console = {
+       .match = plcom_fdt_console_match,
+       .consinit = plcom_fdt_console_consinit,
+};
+
+FDT_CONSOLE(plcom_fdt, &plcom_fdt_console);