MIPS: BCM47xx: Extend the filling of SPROM from NVRAM

Some members of the struct ssb_sprom where not filled with data available
in the NVRAM. Some attribute names in the NVRAM changed from SPROM version
3 to version 4. This patch was done by analyzing the the pci sprom parser
in the ssb code and some open source parts of the braodcom wireless driver
used on embedded devices.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2365/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/bcm47xx/setup.c

@@ -61,6 +61,11 @@ static void bcm47xx_machine_halt(void)
 	if (nvram_getprefix(prefix, name, buf, sizeof(buf)) >= 0)\
 		sprom->_outvar = simple_strtoul(buf, NULL, 0);
 
+#define READ_FROM_NVRAM2(_outvar, name1, name2, buf) \
+	if (nvram_getprefix(prefix, name1, buf, sizeof(buf)) >= 0 || \
+	    nvram_getprefix(prefix, name2, buf, sizeof(buf)) >= 0)\
+		sprom->_outvar = simple_strtoul(buf, NULL, 0);
+
 static inline int nvram_getprefix(const char *prefix, char *name,
 				  char *buf, int len)
 {
@@ -74,6 +79,27 @@ static inline int nvram_getprefix(const char *prefix, char *name,
 	return nvram_getenv(name, buf, len);
 }
 
+static u32 nvram_getu32(const char *name, char *buf, int len)
+{
+	int rv;
+	char key[100];
+	u16 var0, var1;
+
+	snprintf(key, sizeof(key), "%s0", name);
+	rv = nvram_getenv(key, buf, len);
+	/* return 0 here so this looks like unset */
+	if (rv < 0)
+		return 0;
+	var0 = simple_strtoul(buf, NULL, 0);
+
+	snprintf(key, sizeof(key), "%s1", name);
+	rv = nvram_getenv(key, buf, len);
+	if (rv < 0)
+		return 0;
+	var1 = simple_strtoul(buf, NULL, 0);
+	return var1 << 16 | var0;
+}
+
 static void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
 {
 	char buf[100];
@@ -83,7 +109,8 @@ static void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
 
 	sprom->revision = 1; /* Fallback: Old hardware does not define this. */
 	READ_FROM_NVRAM(revision, "sromrev", buf);
-	if (nvram_getprefix(prefix, "il0macaddr", buf, sizeof(buf)) >= 0)
+	if (nvram_getprefix(prefix, "il0macaddr", buf, sizeof(buf)) >= 0 ||
+	    nvram_getprefix(prefix, "macaddr", buf, sizeof(buf)) >= 0)
 		nvram_parse_macaddr(buf, sprom->il0mac);
 	if (nvram_getprefix(prefix, "et0macaddr", buf, sizeof(buf)) >= 0)
 		nvram_parse_macaddr(buf, sprom->et0mac);
@@ -109,20 +136,36 @@ static void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
 	READ_FROM_NVRAM(pa1hib0, "pa1hib0", buf);
 	READ_FROM_NVRAM(pa1hib2, "pa1hib1", buf);
 	READ_FROM_NVRAM(pa1hib1, "pa1hib2", buf);
-	READ_FROM_NVRAM(gpio0, "wl0gpio0", buf);
-	READ_FROM_NVRAM(gpio1, "wl0gpio1", buf);
-	READ_FROM_NVRAM(gpio2, "wl0gpio2", buf);
-	READ_FROM_NVRAM(gpio3, "wl0gpio3", buf);
-	READ_FROM_NVRAM(maxpwr_bg, "pa0maxpwr", buf);
-	READ_FROM_NVRAM(maxpwr_al, "pa1lomaxpwr", buf);
-	READ_FROM_NVRAM(maxpwr_a, "pa1maxpwr", buf);
-	READ_FROM_NVRAM(maxpwr_ah, "pa1himaxpwr", buf);
-	READ_FROM_NVRAM(itssi_a, "pa1itssit", buf);
-	READ_FROM_NVRAM(itssi_bg, "pa0itssit", buf);
+	READ_FROM_NVRAM2(gpio0, "ledbh0", "wl0gpio0", buf);
+	READ_FROM_NVRAM2(gpio1, "ledbh1", "wl0gpio1", buf);
+	READ_FROM_NVRAM2(gpio2, "ledbh2", "wl0gpio2", buf);
+	READ_FROM_NVRAM2(gpio3, "ledbh3", "wl0gpio3", buf);
+	READ_FROM_NVRAM2(maxpwr_bg, "maxp2ga0", "pa0maxpwr", buf);
+	READ_FROM_NVRAM2(maxpwr_al, "maxp5gla0", "pa1lomaxpwr", buf);
+	READ_FROM_NVRAM2(maxpwr_a, "maxp5ga0", "pa1maxpwr", buf);
+	READ_FROM_NVRAM2(maxpwr_ah, "maxp5gha0", "pa1himaxpwr", buf);
+	READ_FROM_NVRAM2(itssi_bg, "itt5ga0", "pa0itssit", buf);
+	READ_FROM_NVRAM2(itssi_a, "itt2ga0", "pa1itssit", buf);
 	READ_FROM_NVRAM(tri2g, "tri2g", buf);
 	READ_FROM_NVRAM(tri5gl, "tri5gl", buf);
 	READ_FROM_NVRAM(tri5g, "tri5g", buf);
 	READ_FROM_NVRAM(tri5gh, "tri5gh", buf);
+	READ_FROM_NVRAM(txpid2g[0], "txpid2ga0", buf);
+	READ_FROM_NVRAM(txpid2g[1], "txpid2ga1", buf);
+	READ_FROM_NVRAM(txpid2g[2], "txpid2ga2", buf);
+	READ_FROM_NVRAM(txpid2g[3], "txpid2ga3", buf);
+	READ_FROM_NVRAM(txpid5g[0], "txpid5ga0", buf);
+	READ_FROM_NVRAM(txpid5g[1], "txpid5ga1", buf);
+	READ_FROM_NVRAM(txpid5g[2], "txpid5ga2", buf);
+	READ_FROM_NVRAM(txpid5g[3], "txpid5ga3", buf);
+	READ_FROM_NVRAM(txpid5gl[0], "txpid5gla0", buf);
+	READ_FROM_NVRAM(txpid5gl[1], "txpid5gla1", buf);
+	READ_FROM_NVRAM(txpid5gl[2], "txpid5gla2", buf);
+	READ_FROM_NVRAM(txpid5gl[3], "txpid5gla3", buf);
+	READ_FROM_NVRAM(txpid5gh[0], "txpid5gha0", buf);
+	READ_FROM_NVRAM(txpid5gh[1], "txpid5gha1", buf);
+	READ_FROM_NVRAM(txpid5gh[2], "txpid5gha2", buf);
+	READ_FROM_NVRAM(txpid5gh[3], "txpid5gha3", buf);
 	READ_FROM_NVRAM(rxpo2g, "rxpo2g", buf);
 	READ_FROM_NVRAM(rxpo5g, "rxpo5g", buf);
 	READ_FROM_NVRAM(rssisav2g, "rssisav2g", buf);
@@ -134,10 +177,18 @@ static void bcm47xx_fill_sprom(struct ssb_sprom *sprom, const char *prefix)
 	READ_FROM_NVRAM(rssismf5g, "rssismf5g", buf);
 	READ_FROM_NVRAM(bxa5g, "bxa5g", buf);
 	READ_FROM_NVRAM(cck2gpo, "cck2gpo", buf);
-	READ_FROM_NVRAM(ofdm2gpo, "ofdm2gpo", buf);
-	READ_FROM_NVRAM(ofdm5glpo, "ofdm5glpo", buf);
-	READ_FROM_NVRAM(ofdm5gpo, "ofdm5gpo", buf);
-	READ_FROM_NVRAM(ofdm5ghpo, "ofdm5ghpo", buf);
+
+	sprom->ofdm2gpo = nvram_getu32("ofdm2gpo", buf, sizeof(buf));
+	sprom->ofdm5glpo = nvram_getu32("ofdm5glpo", buf, sizeof(buf));
+	sprom->ofdm5gpo = nvram_getu32("ofdm5gpo", buf, sizeof(buf));
+	sprom->ofdm5ghpo = nvram_getu32("ofdm5ghpo", buf, sizeof(buf));
+
+	READ_FROM_NVRAM(antenna_gain.ghz24.a0, "ag0", buf);
+	READ_FROM_NVRAM(antenna_gain.ghz24.a1, "ag1", buf);
+	READ_FROM_NVRAM(antenna_gain.ghz24.a2, "ag2", buf);
+	READ_FROM_NVRAM(antenna_gain.ghz24.a3, "ag3", buf);
+	memcpy(&sprom->antenna_gain.ghz5, &sprom->antenna_gain.ghz24,
+	       sizeof(sprom->antenna_gain.ghz5));
 
 	if (nvram_getprefix(prefix, "boardflags", buf, sizeof(buf)) >= 0) {
 		boardflags = simple_strtoul(buf, NULL, 0);