devices: add support for declaring compatible matched devices

Some device have embedded wifi card that are not connected with usb or
internall with pci. Such device have fake device_id and only the
vendor_id actually reflect something real but internally they don't have
any id and are just matched by the node compatible binding in DT.

We currently match this with a big if-else to match the single devices
but this can be improved and be matched directly in devices.txt

Rework this so that we can drop the big if-else and move the matching
to devices.txt

When a device is matched using compatible in iwinfo the hardware will be
flagged as embedded and won't print empty ids.

Update devices.txt by migrating all the compatible matching device from
fake id to compatible matching.

Tested-by: Christian Marangi <ansuelsmth@gmail.com> # ipq4019
Co-developed-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Tested-by: Robert Marko <robimarko@gmail.com> # ipq8074
Reviewed-by: Andre Heider <a.heider@gmail.com>

devices.txt

@@ -141,7 +141,6 @@
 0x168c 0x002a 0x0777 0xe202   12      0  "Ubiquiti" "Bullet M2"
 0x168c 0x002a 0x0777 0xe805    5      0  "Ubiquiti" "Bullet M5"
 0x168c 0x002a 0x0777 0xe345    0      0  "Ubiquiti" "WispStation M5" /* ToDo: confirm offset - Wrong! */
-0x168c 0x0029 0x168c 0x9130    0      0  "Atheros"  "AR9130"
 0x168c 0x0029 0x168c 0xa094    0      0  "Atheros"  "AR9220"
 0x168c 0x0029 0x168c 0xa095    0      0  "Atheros"  "AR9223"
 0x168c 0x002a 0x168c 0xa093    0      0  "Atheros"  "AR9280"
@@ -151,11 +150,6 @@
 0x168c 0x002e 0x0777 0xe0a2    8      0  "Ubiquiti" "NanoStation Loco M2 (XM)" /* wrong offset! */
 0x168c 0x002e 0x168c 0x30a4    0      0  "Atheros"  "AR9287"
 0x168c 0x0030 0x168c 0x3114    0      0  "Atheros"  "AR9390"
-0x168c 0x0030 0x168c 0x9330    0      0  "Atheros"  "AR9330"
-0x168c 0x0030 0x168c 0x9340    0      0  "Atheros"  "AR9340"
-0x168c 0x0033 0x168c 0x9530    0      0  "Qualcomm Atheros"  "QCA9530"
-0x168c 0x0033 0x168c 0x9550    0      0  "Qualcomm Atheros"  "QCA9550"
-0x168c 0x0033 0x168c 0x9560    0      0  "Qualcomm Atheros"  "QCA9560"
 0x168c 0x0033 0x168c 0xa120    0      0  "Atheros"  "AR9580"
 0x168c 0x0033 0x168c 0xa136    0      0  "Atheros"  "AR9580"
 0x168c 0x0033 0x19b6 0xd014    0      0  "MikroTik" "R11e-5HnD"
@@ -166,8 +160,6 @@
 0x168c 0x003c 0x168c 0x3223    0      0  "Qualcomm Atheros" "QCA9880"
 0x168c 0x003c 0x1a56 0x1420    0      0  "Qualcomm Atheros" "QCA9862"
 0x168c 0x003c 0x19b6 0xd03c    0      0  "Mikrotik" "R11e-5HacT"
-0x168c 0x003c 0x168c 0x4019    0      0  "Qualcomm Atheros" "IPQ4019"
-0x168c 0x8074 0x168c 0x8074    0      0  "Qualcomm Atheros" "IPQ8074"
 0x168c 0x003c 0x19b6 0xd075    0      0  "Mikrotik" "R11e-5HacD"
 0x168c 0x0040 0x168c 0x0002    0      0  "Qualcomm Atheros" "QCA9990"
 0x168c 0x0046 0x168c 0xcafe    0      0  "Qualcomm Atheros" "QCA9984"
@@ -193,12 +185,10 @@
 0x14c3 0x7663 0x14c3 0x7663    0      0  "MediaTek" "MT7613BE"
 0x14c3 0x7615 0x7615 0x14c3    0      0  "MediaTek" "MT7615E"
 0x14c3 0x7620 0x14c3 0x000c    0      0  "MediaTek" "MT7620"
-0x14c3 0x7622 0x14c3 0x7622    0      0  "MediaTek" "MT7622"
 0x14c3 0x7628 0x14c3 0x0004    0      0  "MediaTek" "MT76x8"
 0x14c3 0x7650 0x14c3 0x7650    0      0  "MediaTek" "MT7610E"
 0x14c3 0x7662 0x14c3 0x7662    0      0  "MediaTek" "MT76x2E"
 0x14c3 0x7915 0x14c3 0x7915    0      0  "MediaTek" "MT7915E"
-0x14c3 0x7986 0x14c3 0x7986    0      0  "MediaTek" "MT7986"
 0x14e4 0xaa52 0x14e4 0xaa52    0      0  "Broadcom" "BCM43602"
 0x02d0 0xa9a6 0x0000 0x0000    0      0  "Cypress"  "CYW43455"
 0x1ae9 0x0310 0x1ae9 0x0000    0      0  "Wilocity" "Wil6210"
@@ -206,3 +196,16 @@
 # USB devices
 # 0x0000 | 0x0000 | vendor id | product id | ...
 0x0000 0x0000 0x0e8d 0x7961    0      0  "MediaTek" "MT7921AU"
+
+# FDT compatible strings
+# "compatible" | txpower offset | frequency offset | ...
+"qca,ar9130-wmac"       0      0  "Atheros"  "AR9130"
+"qca,ar9330-wmac"       0      0  "Atheros"  "AR9330"
+"qca,ar9340-wmac"       0      0  "Atheros"  "AR9340"
+"qca,qca9530-wmac"      0      0  "Qualcomm Atheros"  "QCA9530"
+"qca,qca9550-wmac"      0      0  "Qualcomm Atheros"  "QCA9550"
+"qca,qca9560-wmac"      0      0  "Qualcomm Atheros"  "QCA9560"
+"qcom,ipq4019-wifi"     0      0  "Qualcomm Atheros" "IPQ4019"
+"qcom,ipq8074-wifi"     0      0  "Qualcomm Atheros" "IPQ8074"
+"mediatek,mt7622-wmac"  0      0  "MediaTek" "MT7622"
+"mediatek,mt7986-wmac"  0      0  "MediaTek" "MT7986"

include/iwinfo.h

@@ -243,6 +243,7 @@ struct iwinfo_hardware_id {
 	uint16_t device_id;
 	uint16_t subsystem_vendor_id;
 	uint16_t subsystem_device_id;
+	char compatible[128];
 };
 
 struct iwinfo_hardware_entry {
@@ -254,6 +255,7 @@ struct iwinfo_hardware_entry {
 	uint16_t subsystem_device_id;
 	int16_t txpower_offset;
 	int16_t frequency_offset;
+	char compatible[128];
 };
 
 extern const struct iwinfo_iso3166_label IWINFO_ISO3166_NAMES[];

iwinfo_cli.c

@@ -335,6 +335,9 @@ static char * print_hardware_id(const struct iwinfo_ops *iw, const char *ifname)
 
 	if (!iw->hardware_id(ifname, (char *)&ids))
 	{
+		if (strlen(ids.compatible) > 0)
+			snprintf(buf, sizeof(buf), "embedded");
+		else
 			snprintf(buf, sizeof(buf), "%04X:%04X %04X:%04X",
 				ids.vendor_id, ids.device_id,
 				ids.subsystem_vendor_id, ids.subsystem_device_id);

iwinfo_nl80211.c

@@ -3445,7 +3445,7 @@ static int nl80211_get_mbssid_support(const char *ifname, int *buf)
 
 static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const char *ifname)
 {
-	char *phy, compat[64], path[PATH_MAX];
+	char *phy, path[PATH_MAX];
 
 	/* Try to determine the phy name from the given interface */
 	phy = nl80211_ifname2phy(ifname);
@@ -3453,62 +3453,10 @@ static int nl80211_hardware_id_from_fdt(struct iwinfo_hardware_id *id, const cha
 	snprintf(path, sizeof(path), "/sys/class/%s/%s/device/of_node/compatible",
 	         phy ? "ieee80211" : "net", phy ? phy : ifname);
 
-	if (nl80211_readstr(path, compat, sizeof(compat)) <= 0)
+	if (nl80211_readstr(path, id->compatible, sizeof(id->compatible)) <= 0)
 		return -1;
 
-	if (!strcmp(compat, "qca,ar9130-wmac")) {
+	return 0;
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0029;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9130;
-	} else if (!strcmp(compat, "qca,ar9330-wmac")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0030;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9330;
-	} else if (!strcmp(compat, "qca,ar9340-wmac")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0030;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9340;
-	} else if (!strcmp(compat, "qca,qca9530-wmac")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0033;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9530;
-	} else if (!strcmp(compat, "qca,qca9550-wmac")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0033;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9550;
-	} else if (!strcmp(compat, "qca,qca9560-wmac")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x0033;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x9560;
-	} else if (!strcmp(compat, "qcom,ipq4019-wifi")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x003c;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x4019;
-	} else if (!strcmp(compat, "qcom,ipq8074-wifi")) {
-		id->vendor_id = 0x168c;
-		id->device_id = 0x8074;
-		id->subsystem_vendor_id = 0x168c;
-		id->subsystem_device_id = 0x8074;
-	} else if (!strcmp(compat, "mediatek,mt7622-wmac")) {
-		id->vendor_id = 0x14c3;
-		id->device_id = 0x7622;
-		id->subsystem_vendor_id = 0x14c3;
-		id->subsystem_device_id = 0x7622;
-	} else if (!strcmp(compat, "mediatek,mt7986-wmac")) {
-		id->vendor_id = 0x14c3;
-		id->device_id = 0x7986;
-		id->subsystem_vendor_id = 0x14c3;
-		id->subsystem_device_id = 0x7986;
-	}
-
-	return (id->vendor_id && id->device_id) ? 0 : -1;
 }
 
 
@@ -3542,15 +3490,12 @@ static int nl80211_get_hardware_id(const char *ifname, char *buf)
 			*lookup[i].dest = strtoul(num, NULL, 16);
 	}
 
-	/* Failed to obtain hardware IDs, try FDT */
+	/* Failed to obtain hardware PCI/USB IDs... */
-	if (id->vendor_id == 0 && id->device_id == 0 &&
-	    id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
-		if (!nl80211_hardware_id_from_fdt(id, ifname))
-			return 0;
-
-	/* Failed to obtain hardware IDs, search board config */
 	if (id->vendor_id == 0 && id->device_id == 0 &&
 	    id->subsystem_vendor_id == 0 && id->subsystem_device_id == 0)
+		/* ... first fallback to FDT ... */
+		if (nl80211_hardware_id_from_fdt(id, ifname) == -1)
+			/* ... then board config */
 			return iwinfo_hardware_id_from_mtd(id);
 
 	return 0;

iwinfo_utils.c

@@ -286,7 +286,10 @@ struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
 			       &e.vendor_id, &e.device_id,
 			       &e.subsystem_vendor_id, &e.subsystem_device_id,
 			       &e.txpower_offset, &e.frequency_offset,
-			       e.vendor_name, e.device_name) < 8)
+			       e.vendor_name, e.device_name) != 8 &&
+			sscanf(buf, "\"%127[^\"]\" %hd %hd \"%63[^\"]\" \"%63[^\"]\"",
+			       e.compatible, &e.txpower_offset, &e.frequency_offset,
+			       e.vendor_name, e.device_name) != 5)
 			continue;
 
 		if ((e.vendor_id != 0xffff) && (e.vendor_id != id->vendor_id))
@@ -303,6 +306,9 @@ struct iwinfo_hardware_entry * iwinfo_hardware(struct iwinfo_hardware_id *id)
 			(e.subsystem_device_id != id->subsystem_device_id))
 			continue;
 
+		if (strcmp(e.compatible, id->compatible))
+			continue;
+
 		rv = &e;
 		break;
 	}