# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/linux/hotfix-mips64-xtalk-bridge.patch
# Copyright (C) 2024 - 2025 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

ld: arch/mips/pci/pci-xtalk-bridge.o: in function `bridge_get_partnum':
pci-xtalk-bridge.c:(.text+0x384): undefined reference to `crc16'

Implement xtalk platform devs for impact and odyssey fb.

Fix phys_to_dma for non PCI xtalk fb devices.

Export xtalk_get_swin for impact and odyssey fb.

  - Rene Rebe <rene@exactcode.de>

--- linux-6.9/arch/mips/Kconfig.vanilla	2024-06-20 18:56:55.436910044 +0200
+++ linux-6.9/arch/mips/Kconfig	2024-06-20 18:55:14.057915930 +0200
@@ -1217,6 +1217,7 @@
 	bool
 
 config PCI_XTALK_BRIDGE
+	select CRC16
 	bool
 
 config NO_EXCEPT_FILL

--- linux-6.14/arch/mips/pci/pci-xtalk-bridge.c.vanilla	2025-05-18 12:58:12.655830947 +0200
+++ linux-6.14/arch/mips/pci/pci-xtalk-bridge.c	2025-05-18 14:08:45.348970530 +0200
@@ -28,10 +28,12 @@
  */
 dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
 {
-	struct pci_dev *pdev = to_pci_dev(dev);
-	struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus);
-
-	return bc->baddr + paddr;
+	if (dev->bus == &pci_bus_type) {
+		struct pci_dev *pdev = to_pci_dev(dev);
+		struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus);
+		return bc->baddr + paddr;
+	}
+	return paddr;
 }
 

--- linux-6.14/arch/mips/sgi-ip30/ip30-xtalk.c.vanilla	2025-05-16 21:01:21.163242399 +0200
+++ linux-6.14/arch/mips/sgi-ip30/ip30-xtalk.c	2025-05-17 12:16:56.077612139 +0200
@@ -36,6 +36,12 @@
 
 #define xtalk_read	__raw_readl
 
+unsigned long
+xtalk_get_swin(int wid)
+{
+	return IP30_SWIN_BASE(wid);
+}
+
 static void bridge_platform_create(int widget, int masterwid)
 {
 	struct xtalk_bridge_platform_data *bd;
@@ -148,23 +154,42 @@
 
 static void __init xtalk_init_widget(s8 wid, s8 masterwid)
 {
+	xwidget_mfg_num_t mfgnum;
 	xwidget_part_num_t partnum;
+	xwidget_rev_num_t rev;
+	
 	widgetreg_t widget_id;
 
 	if (!xbow_widget_active(wid))
 		return;
 
 	widget_id = xtalk_read((void *)(IP30_RAW_SWIN_BASE(wid) + WIDGET_ID));
-
+	mfgnum = XWIDGET_MFG_NUM(widget_id);
 	partnum = XWIDGET_PART_NUM(widget_id);
+	rev = XWIDGET_REV_NUM(widget_id);
+
 
 	switch (partnum) {
 	case BRIDGE_WIDGET_PART_NUM:
 	case XBRIDGE_WIDGET_PART_NUM:
 		bridge_platform_create(wid, masterwid);
 		break;
 	default:
-		pr_info("xtalk:%x unknown widget (0x%x)\n", wid, partnum);
+		{
+ 			const struct widget_ident *wi;
+			for (wi = widget_idents; wi->name; wi++)
+			if (wi->mfgr == mfgnum && wi->part == partnum)
+				break;
+
+			if (wi->name == NULL) {
+				pr_info("xtalk:%x unknown widget (0x%08x)\n", wid, partnum);
+			} else {
+				if (platform_device_register_simple(wi->name, wid, NULL, 0))
+					pr_info("xtalk: %x %s widget (rev %s) "
+						"registered as a platform device.\n", wid,
+						 wi->name, wi->revs[rev] ? : "unknown");
+			}
+		}
 		break;
 	}
 }