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 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 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; 103 const char *tmp; 104 105 of_property_read_string_index(root, "compatible", 0, &tmp); 106 107 /* get rid of '/' in the compatible string to be able to find the FW */ 108 board_type = devm_kstrdup(dev, tmp, GFP_KERNEL); 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