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 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 = NULL;
100 const char *tmp;
101
102 /* get rid of '/' in the compatible string to be able to find the FW */
103 if (!of_property_read_string_index(root, "compatible", 0, &tmp))
104 board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
105
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 if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
116 return;
117
118 err = brcmf_of_get_country_codes(dev, settings);
119 if (err)
120 brcmf_err("failed to get OF country code map (err=%d)\n", err);
121
122 of_get_mac_address(np, settings->mac);
123
124 if (bus_type != BRCMF_BUSTYPE_SDIO)
125 return;
126
127 if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
128 sdio->drive_strength = val;
129
130 /* make sure there are interrupts defined in the node */
131 if (!of_property_present(np, "interrupts"))
132 return;
133
134 irq = irq_of_parse_and_map(np, 0);
135 if (!irq) {
136 brcmf_err("interrupt could not be mapped\n");
137 return;
138 }
139 irqf = irqd_get_trigger_type(irq_get_irq_data(irq));
140
141 sdio->oob_irq_supported = true;
142 sdio->oob_irq_nr = irq;
143 sdio->oob_irq_flags = irqf;
144 }
145