Add generic AHCI SATA controller bus glue

sys/dev/fdt/ahcisata_fdt.c

@@ -0,0 +1,116 @@
+/* $NetBSD: ahcisata_fdt.c,v 1.1 2018/09/03 23:15:12 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2018 Jared McNeill <jmcneill@invisible.ca>
+ * 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 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: ahcisata_fdt.c,v 1.1 2018/09/03 23:15:12 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+
+#include <dev/ata/atavar.h>
+#include <dev/ic/ahcisatavar.h>
+
+#include <dev/fdt/fdtvar.h>
+
+static const char * compatible[] = {
+	"snps,dwc-ahci",
+	"generic-ahci",
+	NULL
+};
+
+static int
+ahcisata_fdt_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
+ahcisata_fdt_attach(device_t parent, device_t self, void *aux)
+{
+	struct ahci_softc * const sc = device_private(self);
+	struct fdt_attach_args * const faa = aux;
+	const int phandle = faa->faa_phandle;
+	struct fdtbus_reset *rst;
+	struct clk *clk;
+	char intrstr[128];
+	bus_addr_t addr;
+	bus_size_t size;
+	int i;
+
+	if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+		aprint_error(": couldn't get registers\n");
+		return;
+	}
+
+	sc->sc_atac.atac_dev = self;
+	sc->sc_dmat = faa->faa_dmat;
+	sc->sc_ahcit = faa->faa_bst;
+	sc->sc_ahcis = size;
+	if (bus_space_map(sc->sc_ahcit, addr, size, 0, &sc->sc_ahcih) != 0) {
+		aprint_error(": couldn't map registers\n");
+		return;
+	}
+	if (of_getprop_uint32(phandle, "ports-implemented", &sc->sc_ahci_ports) != 0)
+		sc->sc_save_init_data = true;
+
+	if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
+		aprint_error(": failed to decode interrupt\n");
+		return;
+	}
+
+	for (i = 0; (clk = fdtbus_clock_get_index(phandle, i)) != NULL; i++)
+		if (clk_enable(clk) != 0) {
+			aprint_error(": couldn't enable clock #%d\n", i);
+			return;
+		}
+	for (i = 0; (rst = fdtbus_reset_get_index(phandle, i)) != NULL; i++)
+		if (fdtbus_reset_deassert(rst) != 0) {
+			aprint_error(": couldn't de-assert reset #%d\n", i);
+			return;
+		}
+
+	aprint_naive("\n");
+	aprint_normal(": AHCI SATA controller\n");
+
+	if (fdtbus_intr_establish(phandle, 0, IPL_BIO, 0, ahci_intr, sc) == NULL) {
+		aprint_error_dev(self, "failed to establish interrupt on %s\n", intrstr);
+		return;
+	}
+	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
+
+	ahci_attach(sc);
+}
+
+CFATTACH_DECL_NEW(ahcisata_fdt, sizeof(struct ahci_softc),
+	ahcisata_fdt_match, ahcisata_fdt_attach, NULL, NULL);

sys/dev/fdt/files.fdt

@@ -1,4 +1,4 @@
-# $NetBSD: files.fdt,v 1.36 2018/07/04 23:08:06 jmcneill Exp $
+# $NetBSD: files.fdt,v 1.37 2018/09/03 23:15:12 jmcneill Exp $
 
 include	"external/bsd/libfdt/conf/files.libfdt"
 
@@ -126,3 +126,7 @@ file	dev/fdt/qemufwcfg_fdt.c			qemufwcfg_fdt
 device	pl061gpio: gpiobus
 attach 	pl061gpio at fdt with pl061gpio_fdt
 file	dev/fdt/pl061gpio_fdt.c			pl061gpio_fdt
+
+# AHCI SATA controller
+attach	ahcisata at fdt with ahcisata_fdt
+file	dev/fdt/ahcisata_fdt.c			ahcisata_fdt