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      1 /*	$NetBSD: sunxi_dep.c,v 1.7 2021/01/27 03:10:20 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2018 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Manuel Bouyer.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 
     33 #include <sys/cdefs.h>
     34 
     35 __KERNEL_RCSID(1, "$NetBSD: sunxi_dep.c,v 1.7 2021/01/27 03:10:20 thorpej Exp $");
     36 
     37 #include <sys/param.h>
     38 #include <sys/bus.h>
     39 #include <sys/device.h>
     40 #include <sys/systm.h>
     41 
     42 #include <libfdt.h>
     43 
     44 #include <dev/fdt/fdtvar.h>
     45 #include <arm/sunxi/sunxi_display.h>
     46 
     47 #include "sunxi_debe.h"
     48 
     49 struct sunxi_dep_softc {
     50 	device_t sc_dev;
     51 	int	sc_phandle;
     52 };
     53 
     54 static const struct device_compatible_entry compat_data[] = {
     55 	{ .compat = "allwinner,sun4i-a10-display-engine" },
     56 	{ .compat = "allwinner,sun7i-a20-display-engine" },
     57 	DEVICE_COMPAT_EOL
     58 };
     59 
     60 static const char *fb_compat[] = {
     61 	"allwinner,simple-framebuffer",
     62 	NULL
     63 };
     64 
     65 static int sunxi_dep_match(device_t, cfdata_t, void *);
     66 static void sunxi_dep_attach(device_t, device_t, void *);
     67 
     68 CFATTACH_DECL_NEW(sunxi_dep, sizeof(struct sunxi_dep_softc),
     69 	sunxi_dep_match, sunxi_dep_attach, NULL, NULL);
     70 
     71 static int
     72 sunxi_dep_match(device_t parent, cfdata_t cf, void *aux)
     73 {
     74 #if NSUNXI_DEBE > 0
     75 	struct fdt_attach_args * const faa = aux;
     76 
     77 	return  of_compatible_match(faa->faa_phandle, compat_data);
     78 #else
     79 	return 0;
     80 #endif
     81 }
     82 
     83 static void
     84 sunxi_dep_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct sunxi_dep_softc * const sc = device_private(self);
     87 	struct fdt_attach_args * const faa = aux;
     88 	const int phandle = faa->faa_phandle;
     89 	int sunxi_dep_npipelines = 0;
     90 	int len;
     91 	const u_int *buf;
     92 	u_int ref;
     93 	int error;
     94 
     95 	sc->sc_dev = self;
     96 
     97 	buf = fdt_getprop(fdtbus_get_data(),
     98 	    fdtbus_phandle2offset(phandle), "allwinner,pipelines", &len);
     99 	if (buf == NULL || len < sizeof(ref) || (len % sizeof(ref)) != 0) {
    100 		aprint_error("bad/missing allwinner,pipelines property\n");
    101 		return;
    102 	}
    103 	aprint_normal(": ");
    104 #if NSUNXI_DEBE > 0
    105 	for (int i = 0; i < (len / sizeof(ref)); i++) {
    106 		if (i > 0)
    107 			aprint_normal_dev(self, "");
    108 		ref = be32dec(&buf[i]);
    109 		error = sunxi_debe_pipeline(
    110 		    fdtbus_get_phandle_from_native(ref), true);
    111 		if (error)
    112 			aprint_error("can't activate pipeline %d\n", i);
    113 		else
    114 			sunxi_dep_npipelines++;
    115 	}
    116 	aprint_naive("\n");
    117 	if (sunxi_dep_npipelines > 0)
    118 		fdt_remove_bycompat(fb_compat);
    119 #else
    120 	aprint_error("debe not configured\n");
    121 	return;
    122 #endif
    123 }
    124