1// SPDX-License-Identifier: ISC
2/*
3 * Copyright (c) 2014 Broadcom Corporation
4 */
5#include <linux/init.h>
6#include <linux/of.h>
7#include <linux/of_irq.h>
8#include <linux/of_net.h>
9
10#include <defs.h>
11#include "debug.h"
12#include "core.h"
13#include "common.h"
14#include "of.h"
15
16static int brcmf_of_get_country_codes(struct device *dev,
17				      struct brcmf_mp_device *settings)
18{
19	struct device_node *np = dev->of_node;
20	struct brcmfmac_pd_cc_entry *cce;
21	struct brcmfmac_pd_cc *cc;
22	int count;
23	int i;
24
25	count = of_property_count_strings(np, "brcm,ccode-map");
26	if (count < 0) {
27		/* If no explicit country code map is specified, check whether
28		 * the trivial map should be used.
29		 */
30		settings->trivial_ccode_map =
31			of_property_read_bool(np, "brcm,ccode-map-trivial");
32
33		/* The property is optional, so return success if it doesn't
34		 * exist. Otherwise propagate the error code.
35		 */
36		return (count == -EINVAL) ? 0 : count;
37	}
38
39	cc = devm_kzalloc(dev, struct_size(cc, table, count), GFP_KERNEL);
40	if (!cc)
41		return -ENOMEM;
42
43	cc->table_size = count;
44
45	for (i = 0; i < count; i++) {
46		const char *map;
47
48		cce = &cc->table[i];
49
50		if (of_property_read_string_index(np, "brcm,ccode-map",
51						  i, &map))
52			continue;
53
54		/* String format e.g. US-Q2-86 */
55		if (sscanf(map, "%2c-%2c-%d", cce->iso3166, cce->cc,
56			   &cce->rev) != 3)
57			brcmf_err("failed to read country map %s\n", map);
58		else
59			brcmf_dbg(INFO, "%s-%s-%d\n", cce->iso3166, cce->cc,
60				  cce->rev);
61	}
62
63	settings->country_codes = cc;
64
65	return 0;
66}
67
68void brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
69		    struct brcmf_mp_device *settings)
70{
71	struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio;
72	struct device_node *root, *np = dev->of_node;
73	const char *prop;
74	int irq;
75	int err;
76	u32 irqf;
77	u32 val;
78
79	/* Apple ARM64 platforms have their own idea of board type, passed in
80	 * via the device tree. They also have an antenna SKU parameter
81	 */
82	err = of_property_read_string(np, "brcm,board-type", &prop);
83	if (!err)
84		settings->board_type = prop;
85
86	if (!of_property_read_string(np, "apple,antenna-sku", &prop))
87		settings->antenna_sku = prop;
88
89	/* The WLAN calibration blob is normally stored in SROM, but Apple
90	 * ARM64 platforms pass it via the DT instead.
91	 */
92	prop = of_get_property(np, "brcm,cal-blob", &settings->cal_size);
93	if (prop && settings->cal_size)
94		settings->cal_blob = prop;
95
96	/* Set board-type to the first string of the machine compatible prop */
97	root = of_find_node_by_path("/");
98	if (root && err) {
99		char *board_type;
100		const char *tmp;
101
102		of_property_read_string_index(root, "compatible", 0, &tmp);
103
104		/* get rid of '/' in the compatible string to be able to find the FW */
105		board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
106		if (!board_type) {
107			of_node_put(root);
108			return;
109		}
110		strreplace(board_type, '/', '-');
111		settings->board_type = board_type;
112
113		of_node_put(root);
114	}
115
116	if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
117		return;
118
119	err = brcmf_of_get_country_codes(dev, settings);
120	if (err)
121		brcmf_err("failed to get OF country code map (err=%d)\n", err);
122
123	of_get_mac_address(np, settings->mac);
124
125	if (bus_type != BRCMF_BUSTYPE_SDIO)
126		return;
127
128	if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
129		sdio->drive_strength = val;
130
131	/* make sure there are interrupts defined in the node */
132	if (!of_property_present(np, "interrupts"))
133		return;
134
135	irq = irq_of_parse_and_map(np, 0);
136	if (!irq) {
137		brcmf_err("interrupt could not be mapped\n");
138		return;
139	}
140	irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
141
142	sdio->oob_irq_supported = true;
143	sdio->oob_irq_nr = irq;
144	sdio->oob_irq_flags = irqf;
145}
146