ipq4018: add initial IPQ4018/IPQ4019 support

This is for the Qualcomm Atheros quad-core ARMv7 SoC with built-in
2x2 2GHz and 5GHz ath10k devices.

It's enough (with an upcoming set of config files) to netboot
on an ASUS router I have here and get to a single core mountroot
prompt.

5 files changed, 337 insertions, 0 deletions

diff --git a/sys/arm/qualcomm/ipq4018_machdep.c b/sys/arm/qualcomm/ipq4018_machdep.c
new file mode 100644
index 000000000000..b3f841575ebb
--- /dev/null
+++ b/sys/arm/qualcomm/ipq4018_machdep.c
@@ -0,0 +1,194 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
+ *
+ * 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 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 AUTHOR 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 "opt_platform.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/reboot.h>
+#include <sys/devmap.h>
+#include <sys/physmem.h>
+
+#include <vm/vm.h>
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+#include <machine/machdep.h>
+#include <machine/platformvar.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+
+#include <arm/qualcomm/ipq4018_machdep.h>
+#include <arm/qualcomm/ipq4018_reg.h>
+
+#include "platform_if.h"
+
+static int
+ipq4018_attach(platform_t plat)
+{
+	return (0);
+}
+
+static void
+ipq4018_late_init(platform_t plat)
+{
+	/*
+	 * XXX FIXME This is needed because we're not parsing
+	 * the fdt reserved memory regions in a consistent way
+	 * between arm/arm64.  Once the reserved region parsing
+	 * is fixed up this will become unneccessary.
+	 *
+	 * These cover the SRAM/TZ regions that are not fully
+	 * accessible from the OS.  They're in the ipq4018.dtsi
+	 * tree.
+	 *
+	 * Without these, the system fails to boot because we
+	 * aren't parsing the regions correctly.
+	 *
+	 * These will be unnecessary once the parser and setup
+	 * code is fixed.
+	 */
+	physmem_exclude_region(IPQ4018_MEM_SMEM_START,
+	    IPQ4018_MEM_SMEM_SIZE,
+	    EXFLAG_NODUMP | EXFLAG_NOALLOC);
+	physmem_exclude_region(IPQ4018_MEM_TZ_START,
+	    IPQ4018_MEM_TZ_SIZE,
+	    EXFLAG_NODUMP | EXFLAG_NOALLOC);
+}
+
+static int
+ipq4018_devmap_init(platform_t plat)
+{
+	/*
+	 * This covers the boot UART.  Without it we can't boot successfully:
+	 * there's a mutex uninit panic in subr_vmem.c that occurs when doing
+	 * a call to pmap_mapdev() when the bus space code is doing its thing.
+	 */
+	devmap_add_entry(IPQ4018_MEM_UART1_START, IPQ4018_MEM_UART1_SIZE);
+	return (0);
+}
+
+static void
+ipq4018_cpu_reset(platform_t plat)
+{
+}
+
+/*
+ * Early putc routine for EARLY_PRINTF support.  To use, add to kernel config:
+ *   option SOCDEV_PA=0x07800000
+ *   option SOCDEV_VA=0x07800000
+ *   option EARLY_PRINTF
+ * Resist the temptation to change the #if 0 to #ifdef EARLY_PRINTF here. It
+ * makes sense now, but if multiple SOCs do that it will make early_putc another
+ * duplicate symbol to be eliminated on the path to a generic kernel.
+ */
+#if 0
+void
+qca_msm_early_putc(int c)
+{
+	static int is_init = 0;
+
+	int limit;
+/*
+ * This must match what's put into SOCDEV_VA.  You have to change them
+ * both together.
+ *
+ * XXX TODO I should really go and just make UART_BASE here depend upon
+ * SOCDEV_VA so they move together.
+ */
+#define UART_BASE IPQ4018_MEM_UART1_START
+	volatile uint32_t * UART_DM_TF0 = (uint32_t *)(UART_BASE + 0x70);
+	volatile uint32_t * UART_DM_SR = (uint32_t *)(UART_BASE + 0x08);
+#define UART_DM_SR_TXEMT (1 << 3)
+#define UART_DM_SR_TXRDY (1 << 2)
+	volatile uint32_t * UART_DM_ISR = (uint32_t *)(UART_BASE + 0x14);
+	volatile uint32_t * UART_DM_CR = (uint32_t *)(UART_BASE + 0x10);
+#define UART_DM_TX_READY (1 << 7)
+#define UART_DM_CLEAR_TX_READY 0x300
+	volatile uint32_t * UART_DM_NO_CHARS_FOR_TX = (uint32_t *)(UART_BASE + 0x40);
+	volatile uint32_t * UART_DM_TFWR = (uint32_t *)(UART_BASE + 0x1c);
+#define UART_DM_TFW_VALUE 0
+	volatile uint32_t * UART_DM_IPR = (uint32_t *)(UART_BASE + 0x18);
+#define  UART_DM_STALE_TIMEOUT_LSB 0xf
+
+	if (is_init == 0) {
+		is_init = 1;
+		*UART_DM_TFWR = UART_DM_TFW_VALUE;
+		wmb();
+		*UART_DM_IPR = UART_DM_STALE_TIMEOUT_LSB;
+		wmb();
+	}
+
+	/* Wait until TXFIFO is empty via ISR */
+	limit = 100000;
+	if ((*UART_DM_SR & UART_DM_SR_TXEMT) == 0) {
+		while (((*UART_DM_ISR & UART_DM_TX_READY) == 0) && --limit) {
+			/* Note - can't use DELAY here yet, too early */
+			rmb();
+		}
+		*UART_DM_CR = UART_DM_CLEAR_TX_READY;
+		wmb();
+	}
+
+	/* FIFO is ready.  Say we're going to write one byte */
+	*UART_DM_NO_CHARS_FOR_TX = 1;
+	wmb();
+
+	limit = 100000;
+	while (((*UART_DM_SR & UART_DM_SR_TXRDY) == 0) && --limit) {
+		/* Note - can't use DELAY here yet, too early */
+		rmb();
+	}
+
+	/* Put character in first fifo slot */
+	*UART_DM_TF0 = c;
+	wmb();
+}
+early_putc_t *early_putc = qca_msm_early_putc;
+#endif
+
+static platform_method_t ipq4018_methods[] = {
+	PLATFORMMETHOD(platform_attach,         ipq4018_attach),
+	PLATFORMMETHOD(platform_devmap_init,    ipq4018_devmap_init),
+	PLATFORMMETHOD(platform_late_init,      ipq4018_late_init),
+	PLATFORMMETHOD(platform_cpu_reset,      ipq4018_cpu_reset),
+
+#ifdef SMP
+	PLATFORMMETHOD(platform_mp_start_ap,    ipq4018_mp_start_ap),
+	PLATFORMMETHOD(platform_mp_setmaxid,    ipq4018_mp_setmaxid),
+#endif
+
+	PLATFORMMETHOD_END,
+};
+
+FDT_PLATFORM_DEF2(ipq4018, ipq4018_ac58u, "ASUS RT-AC58U", 0,
+    "asus,rt-ac58u", 80);
diff --git a/sys/arm/qualcomm/ipq4018_machdep.h b/sys/arm/qualcomm/ipq4018_machdep.h
new file mode 100644
index 000000000000..8fbd26de14a8
--- /dev/null
+++ b/sys/arm/qualcomm/ipq4018_machdep.h
@@ -0,0 +1,38 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
+ *
+ * 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 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	IPQ4018_MACHDEP_H
+#define	IPQ4018_MACHDEP_H
+
+#include <sys/types.h>
+
+void	ipq4018_mp_setmaxid(platform_t plat);
+void	ipq4018_mp_start_ap(platform_t plat);
+
+#endif
diff --git a/sys/arm/qualcomm/ipq4018_mp.c b/sys/arm/qualcomm/ipq4018_mp.c
new file mode 100644
index 000000000000..37b7cc3e097d
--- /dev/null
+++ b/sys/arm/qualcomm/ipq4018_mp.c
@@ -0,0 +1,61 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
+ *
+ * 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 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 AUTHOR 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 "opt_platform.h"
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/reboot.h>
+#include <sys/devmap.h>
+
+#include <vm/vm.h>
+
+#include <machine/bus.h>
+#include <machine/intr.h>
+#include <machine/machdep.h>
+#include <machine/platformvar.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+
+#include <arm/qualcomm/ipq4018_machdep.h>
+
+#include "platform_if.h"
+
+void
+ipq4018_mp_setmaxid(platform_t plat)
+{
+}
+
+void
+ipq4018_mp_start_ap(platform_t plat)
+{
+}
diff --git a/sys/arm/qualcomm/ipq4018_reg.h b/sys/arm/qualcomm/ipq4018_reg.h
new file mode 100644
index 000000000000..945d650dcfd6
--- /dev/null
+++ b/sys/arm/qualcomm/ipq4018_reg.h
@@ -0,0 +1,42 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
+ *
+ * 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 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef	IPQ4018_REG_H
+#define	IPQ4018_REG_H
+
+#define	IPQ4018_MEM_SMEM_START		0x87e00000
+#define	IPQ4018_MEM_SMEM_SIZE		0x00080000
+
+#define	IPQ4018_MEM_TZ_START		0x87e80000
+#define	IPQ4018_MEM_TZ_SIZE		0x00180000
+
+#define	IPQ4018_MEM_UART1_START		0x078af000
+#define	IPQ4018_MEM_UART1_SIZE		0x00001000
+
+#endif
diff --git a/sys/arm/qualcomm/std.ipq4018 b/sys/arm/qualcomm/std.ipq4018
new file mode 100644
index 000000000000..9a9801fa6415
--- /dev/null
+++ b/sys/arm/qualcomm/std.ipq4018
@@ -0,0 +1,2 @@
+arm/qualcomm/ipq4018_machdep.c		standard
+arm/qualcomm/ipq4018_mp.c		optional smp