Add support for AHCI on ARMADA38X

This file provides support for AHCI mode on Armada38x
and adds new optional AHCI device to arm/mv/files.mv.

Submitted by:          Konrad Adamczyk <ka@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          Stormshield
Reviewed by:           zbb
Differential revision: https://reviews.freebsd.org/D9222

(cherry picked from commit fe61d0f11bd46101781aaf1c4c8bea8f63b91a7b)

3 files changed, 160 insertions, 0 deletions

diff --git a/sys/arm/conf/ARMADA38X b/sys/arm/conf/ARMADA38X
index aa5f23d..152afd8 100644
--- a/sys/arm/conf/ARMADA38X
+++ b/sys/arm/conf/ARMADA38X
@@ -57,6 +57,9 @@ device		scbus
 device		pass
 device		da
 
+# SATA
+device		ahci
+
 # I2C
 device		iic
 device		iicbus
diff --git a/sys/arm/mv/files.mv b/sys/arm/mv/files.mv
index 8c303c6..e058ed0 100644
--- a/sys/arm/mv/files.mv
+++ b/sys/arm/mv/files.mv
@@ -29,5 +29,6 @@ dev/uart/uart_dev_ns8250.c	optional	uart
 dev/uart/uart_dev_snps.c	optional	uart
 dev/usb/controller/ehci_mv.c	optional	ehci
 dev/usb/controller/xhci_mv.c	optional	xhci
+dev/ahci/ahci_mv_fdt.c		optional	ahci
 
 kern/kern_clocksource.c		standard
diff --git a/sys/dev/ahci/ahci_mv_fdt.c b/sys/dev/ahci/ahci_mv_fdt.c
new file mode 100644
index 0000000..cf5b853
--- /dev/null
+++ b/sys/dev/ahci/ahci_mv_fdt.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2017 Semihalf.
+ * Copyright (c) 2017 Stormshield.
+ * 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 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/stdint.h>
+#include <sys/stddef.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/bus.h>
+#include <sys/module.h>
+#include <sys/sysctl.h>
+#include <sys/rman.h>
+#include <sys/unistd.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include <dev/ahci/ahci.h>
+
+#define		AHCI_VENDOR_SPECIFIC_0_ADDR	0xa0
+#define		AHCI_VENDOR_SPECIFIC_0_DATA	0xa4
+
+#define		AHCI_HC_DEVSTR		"Marvell AHCI Controller"
+#define		AHCI_HC_VENDOR		"Marvell"
+
+static device_attach_t ahci_mv_fdt_attach;
+
+static struct ofw_compat_data compatible_data[] = {
+	{"marvell,armada-380-ahci",	true},
+	{NULL,				false}
+};
+
+static void
+ahci_mv_regret_config(struct ahci_controller *ctlr)
+{
+
+	/*
+	 * Enable the regret bit to allow the SATA unit to regret
+	 * a request that didn't receive an acknowledge
+	 * and a avoid deadlock
+	 */
+	ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_ADDR, 0x4);
+	ATA_OUTL(ctlr->r_mem, AHCI_VENDOR_SPECIFIC_0_DATA, 0x80);
+}
+
+static int
+ahci_mv_fdt_probe(device_t dev)
+{
+
+	if (!ofw_bus_status_okay(dev))
+		return (ENXIO);
+
+	if (!ofw_bus_search_compatible(dev, compatible_data)->ocd_data)
+		return (ENXIO);
+
+	device_set_desc(dev, AHCI_HC_DEVSTR);
+
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+ahci_mv_fdt_attach(device_t dev)
+{
+	struct ahci_controller *ctlr;
+	int rc;
+
+	ctlr = device_get_softc(dev);
+	ctlr->dev = dev;
+	ctlr->r_rid = 0;
+	ctlr->quirks = AHCI_Q_2CH;
+	ctlr->numirqs = 1;
+
+	if (ofw_bus_is_compatible(dev, "marvell,armada-380-ahci"))
+		ctlr->quirks |= AHCI_Q_MRVL_SR_DEL;
+
+	/* Allocate memory for controller */
+	ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+	    &ctlr->r_rid, RF_ACTIVE | RF_SHAREABLE);
+	if (ctlr->r_mem == NULL) {
+		device_printf(dev, "Failed to alloc memory for controller\n");
+		return (ENOMEM);
+	}
+
+	/* Reset controller */
+	rc = ahci_ctlr_reset(dev);
+	if (rc != 0) {
+		device_printf(dev, "Failed to reset controller\n");
+		bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
+		return (ENXIO);
+	}
+
+	ahci_mv_regret_config(ctlr);
+
+	rc = ahci_attach(dev);
+	if (rc != 0) {
+		device_printf(dev, "Failed to initialize AHCI, with error %d\n", rc);
+		return (ENXIO);
+	}
+
+	return (0);
+}
+
+static device_method_t ahci_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,			ahci_mv_fdt_probe),
+	DEVMETHOD(device_attach,		ahci_mv_fdt_attach),
+	DEVMETHOD(device_detach,		ahci_detach),
+	DEVMETHOD(bus_alloc_resource,       	ahci_alloc_resource),
+	DEVMETHOD(bus_release_resource,     	ahci_release_resource),
+	DEVMETHOD(bus_setup_intr,   		ahci_setup_intr),
+	DEVMETHOD(bus_teardown_intr,		ahci_teardown_intr),
+	DEVMETHOD(bus_print_child,		ahci_print_child),
+	DEVMETHOD(bus_child_location_str, 	ahci_child_location_str),
+	DEVMETHOD(bus_get_dma_tag,  		ahci_get_dma_tag),
+	DEVMETHOD_END
+};
+
+static devclass_t ahci_devclass;
+static driver_t ahci_driver = {
+	"ahci",
+	ahci_methods,
+	sizeof(struct ahci_controller)
+};
+
+DRIVER_MODULE(ahci, simplebus, ahci_driver, ahci_devclass, NULL, NULL);
+DRIVER_MODULE(ahci, ofwbus, ahci_driver, ahci_devclass, NULL, NULL);