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 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 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; 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