realtek: add detection of RTL930X SoCs and RTL8313 SoC

This adds support to detect RTL930X based SoCs and the RTL9313 SoC.
Tested on Zyxel XGS1210-10 (RTL9302B SoC) and the
Zyxel XS1930-12 (RTL9313 SoC)

Signed-off-by: Birger Koblitz <[email protected]>

target/linux/realtek/files-5.4/arch/mips/rtl838x/prom.c

@@ -66,19 +66,64 @@ static void __init prom_init_cmdline(void)
 	pr_info("Kernel command line: %s\n", arcs_cmdline);
 }
 
+void __init identify_rtl9302(void)
+{
+	switch (sw_r32(RTL93XX_MODEL_NAME_INFO) & 0xfffffff0) {
+	case 0x93020810:
+		soc_info.name = "RTL9302A 12x2.5G";
+		break;
+	case 0x93021010:
+		soc_info.name = "RTL9302B 8x2.5G";
+		break;
+	case 0x93021810:
+		soc_info.name = "RTL9302C 16x2.5G";
+		break;
+	case 0x93022010:
+		soc_info.name = "RTL9302D 24x2.5G";
+		break;
+	case 0x93020800:
+		soc_info.name = "RTL9302A";
+		break;
+	case 0x93021000:
+		soc_info.name = "RTL9302B";
+		break;
+	case 0x93021800:
+		soc_info.name = "RTL9302C";
+		break;
+	case 0x93022000:
+		soc_info.name = "RTL9302D";
+		break;
+	case 0x93023001:
+		soc_info.name = "RTL9302F";
+		break;
+	default:
+		soc_info.name = "RTL9302";
+	}
+}
+
 void __init prom_init(void)
 {
 	uint32_t model;
 
 	/* uart0 */
-        setup_8250_early_printk_port(0xb8002000, 2, 0);
+	setup_8250_early_printk_port(0xb8002000, 2, 0);
 
-	soc_info.sw_base = RTL838X_SW_BASE;
+	model = sw_r32(RTL838X_MODEL_NAME_INFO);
+	pr_info("RTL838X model is %x\n", model);
+	model = model >> 16 & 0xFFFF;
 
-	model = sw_r32(RTL838X_MODEL_NAME_INFO) >> 16;
-	if (model != 0x8328 && model != 0x8330 && model != 0x8332 &&
-	    model != 0x8380 && model != 0x8382)
-		model = sw_r32(RTL839X_MODEL_NAME_INFO) >> 16;
+	if ((model != 0x8328) && (model != 0x8330) && (model != 0x8332)
+	    && (model != 0x8380) && (model != 0x8382)) {
+		model = sw_r32(RTL839X_MODEL_NAME_INFO);
+		pr_info("RTL839X model is %x\n", model);
+		model = model >> 16 & 0xFFFF;
+	}
+
+	if ((model & 0x8390) != 0x8380 && (model & 0x8390) != 0x8390) {
+		model = sw_r32(RTL93XX_MODEL_NAME_INFO);
+		pr_info("RTL93XX model is %x\n", model);
+		model = model >> 16 & 0xFFFF;
+	}
 
 	soc_info.id = model;
 
@@ -115,10 +160,24 @@ void __init prom_init(void)
 		soc_info.name = "RTL8393";
 		soc_info.family = RTL8390_FAMILY_ID;
 		break;
+	case 0x9301:
+		soc_info.name = "RTL9301";
+		soc_info.family = RTL9300_FAMILY_ID;
+		break;
+	case 0x9302:
+		identify_rtl9302();
+		soc_info.family = RTL9300_FAMILY_ID;
+		break;
+	case 0x9313:
+		soc_info.name = "RTL9313";
+		soc_info.family = RTL9310_FAMILY_ID;
+		break;
 	default:
 		soc_info.name = "DEFAULT";
 		soc_info.family = 0;
 	}
+
 	pr_info("SoC Type: %s\n", get_system_type());
+
 	prom_init_cmdline();
 }