原始版本

2025-06-19 21:56:46 +08:00
parent fe98e5f010
commit a4841450cf
4152 changed files with 1910684 additions and 0 deletions
--- a/RT_Thread/components/drivers/pci/irq.c
+++ b/RT_Thread/components/drivers/pci/irq.c
@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-11-07     GuEe-GUI     first version
+ */
+
+#include <rtthread.h>
+
+#define DBG_TAG "pci.irq"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#include <drivers/pci.h>
+
+void rt_pci_assign_irq(struct rt_pci_device *pdev)
+{
+    int irq = 0;
+    rt_uint8_t pin, slot = -1;
+    struct rt_pci_host_bridge *host_bridge = rt_pci_find_host_bridge(pdev->bus);
+
+    if (!host_bridge->irq_map)
+    {
+        LOG_D("PCI-Device<%s> runtime IRQ mapping not provided by platform",
+                rt_dm_dev_get_name(&pdev->parent));
+
+        return;
+    }
+
+    /* Must try the swizzle when interrupt line passes through a P2P bridge */
+    rt_pci_read_config_u8(pdev, PCIR_INTPIN, &pin);
+
+    if (pin > RT_PCI_INTX_PIN_MAX)
+    {
+        pin = 1;
+    }
+
+    if (pin)
+    {
+        if (host_bridge->irq_slot)
+        {
+            slot = host_bridge->irq_slot(pdev, &pin);
+        }
+
+        /* Map IRQ */
+        if ((irq = host_bridge->irq_map(pdev, slot, pin)) == -1)
+        {
+            irq = 0;
+        }
+    }
+    pdev->irq = irq;
+
+    LOG_D("PCI-Device<%s> assign IRQ: got %d", rt_dm_dev_get_name(&pdev->parent), pdev->irq);
+
+    /* Save IRQ */
+    rt_pci_write_config_u8(pdev, PCIR_INTLINE, irq);
+}