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 #include <linux/clk.h>
10
11 #include <defs.h>
12 #include "debug.h"
13 #include "core.h"
14 #include "common.h"
15 #include "of.h"
16
brcmf_of_get_country_codes(struct device * dev,struct brcmf_mp_device * settings)17 static int brcmf_of_get_country_codes(struct device *dev,
18 struct brcmf_mp_device *settings)
19 {
20 struct device_node *np = dev->of_node;
21 struct brcmfmac_pd_cc_entry *cce;
22 struct brcmfmac_pd_cc *cc;
23 int count;
24 int i;
25
26 count = of_property_count_strings(np, "brcm,ccode-map");
27 if (count < 0) {
28 /* If no explicit country code map is specified, check whether
29 * the trivial map should be used.
30 */
31 settings->trivial_ccode_map =
32 of_property_read_bool(np, "brcm,ccode-map-trivial");
33
34 /* The property is optional, so return success if it doesn't
35 * exist. Otherwise propagate the error code.
36 */
37 return (count == -EINVAL) ? 0 : count;
38 }
39
40 cc = devm_kzalloc(dev, struct_size(cc, table, count), GFP_KERNEL);
41 if (!cc)
42 return -ENOMEM;
43
44 cc->table_size = count;
45
46 for (i = 0; i < count; i++) {
47 const char *map;
48
49 cce = &cc->table[i];
50
51 if (of_property_read_string_index(np, "brcm,ccode-map",
52 i, &map))
53 continue;
54
55 /* String format e.g. US-Q2-86 */
56 if (sscanf(map, "%2c-%2c-%d", cce->iso3166, cce->cc,
57 &cce->rev) != 3)
58 brcmf_err("failed to read country map %s\n", map);
59 else
60 brcmf_dbg(INFO, "%s-%s-%d\n", cce->iso3166, cce->cc,
61 cce->rev);
62 }
63
64 settings->country_codes = cc;
65
66 return 0;
67 }
68
brcmf_of_probe(struct device * dev,enum brcmf_bus_type bus_type,struct brcmf_mp_device * settings)69 int brcmf_of_probe(struct device *dev, enum brcmf_bus_type bus_type,
70 struct brcmf_mp_device *settings)
71 {
72 struct brcmfmac_sdio_pd *sdio = &settings->bus.sdio;
73 struct device_node *root, *np = dev->of_node;
74 struct of_phandle_args oirq;
75 struct clk *clk;
76 const char *prop;
77 int irq;
78 int err;
79 u32 irqf;
80 u32 val;
81
82 /* Apple ARM64 platforms have their own idea of board type, passed in
83 * via the device tree. They also have an antenna SKU parameter
84 */
85 err = of_property_read_string(np, "brcm,board-type", &prop);
86 if (!err)
87 settings->board_type = prop;
88
89 if (!of_property_read_string(np, "apple,antenna-sku", &prop))
90 settings->antenna_sku = prop;
91
92 /* The WLAN calibration blob is normally stored in SROM, but Apple
93 * ARM64 platforms pass it via the DT instead.
94 */
95 prop = of_get_property(np, "brcm,cal-blob", &settings->cal_size);
96 if (prop && settings->cal_size)
97 settings->cal_blob = prop;
98
99 /* Set board-type to the first string of the machine compatible prop */
100 root = of_find_node_by_path("/");
101 if (root && err) {
102 char *board_type = NULL;
103 const char *tmp;
104
105 /* get rid of '/' in the compatible string to be able to find the FW */
106 if (!of_property_read_string_index(root, "compatible", 0, &tmp))
107 board_type = devm_kstrdup(dev, tmp, GFP_KERNEL);
108
109 if (!board_type) {
110 of_node_put(root);
111 return 0;
112 }
113 strreplace(board_type, '/', '-');
114 settings->board_type = board_type;
115 }
116 of_node_put(root);
117
118 clk = devm_clk_get_optional_enabled_with_rate(dev, "lpo", 32768);
119 if (IS_ERR(clk))
120 return PTR_ERR(clk);
121
122 brcmf_dbg(INFO, "%s LPO clock\n", clk ? "enable" : "no");
123
124 if (!np || !of_device_is_compatible(np, "brcm,bcm4329-fmac"))
125 return 0;
126
127 err = brcmf_of_get_country_codes(dev, settings);
128 if (err)
129 brcmf_err("failed to get OF country code map (err=%d)\n", err);
130
131 of_get_mac_address(np, settings->mac);
132
133 if (bus_type != BRCMF_BUSTYPE_SDIO)
134 return 0;
135
136 if (of_property_read_u32(np, "brcm,drive-strength", &val) == 0)
137 sdio->drive_strength = val;
138
139 /* make sure there are interrupts defined in the node */
140 if (of_irq_parse_one(np, 0, &oirq))
141 return 0;
142
143 irq = irq_create_of_mapping(&oirq);
144 if (!irq) {
145 brcmf_err("interrupt could not be mapped\n");
146 return 0;
147 }
148 irqf = irq_get_trigger_type(irq);
149
150 sdio->oob_irq_supported = true;
151 sdio->oob_irq_nr = irq;
152 sdio->oob_irq_flags = irqf;
153
154 return 0;
155 }
156