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
brcmf_of_get_country_codes(struct device * dev,struct brcmf_mp_device * settings)16 static 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
brcmf_of_probe(struct device * dev,enum brcmf_bus_type bus_type,struct brcmf_mp_device * settings)68 void 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 struct of_phandle_args oirq;
74 const char *prop;
75 int irq;
76 int err;
77 u32 irqf;
78 u32 val;
79
80 /* Apple ARM64 platforms have their own idea of board type, passed in
81 * via the device tree. They also have an antenna SKU parameter
82 */
83 err = of_property_read_string(np, "brcm,board-type", &prop);
84 if (!err)
85 settings->board_type = prop;
86
87 if (!of_property_read_string(np, "apple,antenna-sku", &prop))
88 settings->antenna_sku = prop;
89
90 /* The WLAN calibration blob is normally stored in SROM, but Apple
91 * ARM64 platforms pass it via the DT instead.
92 */
93 prop = of_get_property(np, "brcm,cal-blob", &settings->cal_size);
94 if (prop && settings->cal_size)
95 settings->cal_blob = prop;
96
97 /* Set board-type to the first string of the machine compatible prop */
98 root = of_find_node_by_path("/");
99 if (root && err) {
100 char *board_type;
101 const char *tmp;
102
103 of_property_read_string_index(root, "compatible", 0, &tmp);
104
105 /* get rid of '/' in the compatible string to be able to find the FW */
106 board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
107 if (!board_type) {
108 of_node_put(root);
109 return;
110 }
111 strreplace(board_type, '/', '-');
112 settings->board_type = board_type;
113
114 of_node_put(root);
115 }
116
117 if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
118 return;
119
120 err = brcmf_of_get_country_codes(dev, settings);
121 if (err)
122 brcmf_err("failed to get OF country code map (err=%d)\n", err);
123
124 of_get_mac_address(np, settings->mac);
125
126 if (bus_type != BRCMF_BUSTYPE_SDIO)
127 return;
128
129 if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
130 sdio->drive_strength = val;
131
132 /* make sure there are interrupts defined in the node */
133 if (of_irq_parse_one(np, 0, &oirq))
134 return;
135
136 irq = irq_create_of_mapping(&oirq);
137 if (!irq) {
138 brcmf_err("interrupt could not be mapped\n");
139 return;
140 }
141 irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
142
143 sdio->oob_irq_supported = true;
144 sdio->oob_irq_nr = irq;
145 sdio->oob_irq_flags = irqf;
146 }
147