broadcom-wl: make it work on the RT-N16 and other device using the BCMA bus - refresh and reorder patches - introduce a unified BCMA/SSB glue driver to accomodate for both bus types on brcm47xx - extend wlunbind init script to detach device from bcma-pci-bridge as well

SVN-Revision: 27751

1 files changed, 323 insertions, 0 deletions

diff --git a/package/broadcom-wl/src/glue/wl_glue.c b/package/broadcom-wl/src/glue/wl_glue.c
new file mode 100644
index 0000000000..18e2b3a583
--- /dev/null
+++ b/package/broadcom-wl/src/glue/wl_glue.c
@@ -0,0 +1,323 @@
+/*
+ * wl_glue.c: Broadcom WL support module providing a unified SSB/BCMA handling.
+ * Copyright (C) 2011 Jo-Philipp Wich <jow@openwrt.org>
+ */
+
+#include "wl_glue.h"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#ifdef CONFIG_BCM47XX
+#include <bcm47xx.h>
+#endif
+
+#ifdef CONFIG_SSB
+#include <linux/ssb/ssb.h>
+#endif
+
+#ifdef CONFIG_BCMA
+#include <linux/bcma/bcma.h>
+#endif
+
+MODULE_AUTHOR("Jo-Philipp Wich (jow@openwrt.org)");
+MODULE_DESCRIPTION("Broadcom WL SSB/BCMA compatibility layer");
+MODULE_LICENSE("GPL");
+
+static wl_glue_attach_cb_t attach_cb = NULL;
+static wl_glue_remove_cb_t remove_cb = NULL;
+static enum wl_glue_bus_type active_bus_type = WL_GLUE_BUS_TYPE_UNSPEC;
+static int wl_glue_attached = 0;
+
+
+#ifdef CONFIG_SSB
+static int wl_glue_ssb_probe(struct ssb_device *dev, const struct ssb_device_id *id)
+{
+	void *mmio;
+	void *wldev;
+
+	if (!attach_cb)
+	{
+		pr_err("No attach callback registered\n");
+		return -ENOSYS;
+	}
+
+	if (dev->bus->bustype != SSB_BUSTYPE_SSB)
+	{
+		pr_err("Attaching to SSB behind PCI is not supported. Please remove the b43 ssb bridge\n");
+		return -EINVAL;
+	}
+
+	mmio = (void *) 0x18000000 + dev->core_index * 0x1000;
+	wldev = attach_cb(id->vendor, id->coreid, (ulong)mmio, dev, dev->irq);
+
+	if (!wldev)
+	{
+		pr_err("The attach callback failed, SSB probe aborted\n");
+		return -ENODEV;
+	}
+
+	ssb_set_drvdata(dev, wldev);
+	return 0;
+}
+
+static void wl_glue_ssb_remove(struct ssb_device *dev)
+{
+	void *wldev = ssb_get_drvdata(dev);
+
+	if (remove_cb)
+		remove_cb(wldev);
+
+	ssb_set_drvdata(dev, NULL);
+}
+
+static const struct ssb_device_id wl_glue_ssb_tbl[] = {
+	SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, SSB_ANY_REV),
+	SSB_DEVTABLE_END
+};
+
+static struct ssb_driver wl_glue_ssb_driver = {
+	.name     = KBUILD_MODNAME,
+	.id_table = wl_glue_ssb_tbl,
+	.probe    = wl_glue_ssb_probe,
+	.remove   = wl_glue_ssb_remove,
+};
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+static int wl_glue_bcma_probe(struct bcma_device *dev)
+{
+	void *mmio;
+	void *wldev;
+
+	if (!attach_cb)
+	{
+		pr_err("No attach callback registered\n");
+		return -ENOSYS;
+	}
+
+	if (dev->bus->hosttype != BCMA_HOSTTYPE_SOC)
+	{
+		pr_err("Unsupported BCMA bus type %d\n", dev->bus->hosttype);
+		return -EINVAL;
+	}
+
+	/*
+	 * NB:
+	 * 0x18000000 = BCMA_ADDR_BASE
+	 * 0x1000     = BCMA_CORE_SIZE
+	 */
+
+	mmio = (void *) 0x18000000 + dev->core_index * 0x1000;
+	wldev = attach_cb(dev->id.manuf, dev->id.id, (ulong)mmio, dev, dev->irq);
+
+	if (!wldev)
+	{
+		pr_err("The attach callback failed, BCMA probe aborted\n");
+		return -ENODEV;
+	}
+
+	bcma_set_drvdata(dev, wldev);
+	return 0;
+}
+
+static void wl_glue_bcma_remove(struct bcma_device *dev)
+{
+	void *wldev = bcma_get_drvdata(dev);
+
+	if (remove_cb)
+		remove_cb(wldev);
+
+	bcma_set_drvdata(dev, NULL);
+}
+
+static const struct bcma_device_id wl_glue_bcma_tbl[] = {
+	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_80211, BCMA_ANY_REV, BCMA_ANY_CLASS),
+	BCMA_CORETABLE_END
+};
+
+static struct bcma_driver wl_glue_bcma_driver = {
+	.name     = KBUILD_MODNAME,
+	.id_table = wl_glue_bcma_tbl,
+	.probe    = wl_glue_bcma_probe,
+	.remove   = wl_glue_bcma_remove,
+};
+#endif /* CONFIG_BCMA */
+
+
+void wl_glue_set_attach_callback(wl_glue_attach_cb_t cb)
+{
+	attach_cb = cb;
+}
+EXPORT_SYMBOL(wl_glue_set_attach_callback);
+
+void wl_glue_set_remove_callback(wl_glue_remove_cb_t cb)
+{
+	remove_cb = cb;
+}
+EXPORT_SYMBOL(wl_glue_set_remove_callback);
+
+int wl_glue_register(void)
+{
+	int err;
+
+	switch(active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		err = ssb_driver_register(&wl_glue_ssb_driver);
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		err = bcma_driver_register(&wl_glue_bcma_driver);
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		pr_err("Not attaching through glue driver due to unsupported bus\n");
+		err = -ENOSYS;
+		break;
+	}
+
+	if (!err)
+	{
+		pr_info("SSB/BCMA glue driver successfully attached\n");
+		wl_glue_attached = 1;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(wl_glue_register);
+
+int wl_glue_unregister(void)
+{
+	int err;
+
+	if (!wl_glue_attached)
+		return -ENOSYS;
+
+	switch (active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		ssb_driver_unregister(&wl_glue_ssb_driver);
+		err = 0;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		bcma_driver_unregister(&wl_glue_bcma_driver);
+		err = 0;
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		pr_err("Not removing glue driver due to unsupported bus\n");
+		err = -ENOSYS;
+		break;
+	}
+
+	if (!err)
+	{
+		pr_info("SSB/BCMA glue driver successfully detached\n");
+		wl_glue_attached = 0;
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(wl_glue_unregister);
+
+struct device * wl_glue_get_dmadev(void *dev)
+{
+	struct device *dma_dev;
+
+	if (!wl_glue_attached)
+	{
+		BUG();
+		return NULL;
+	}
+
+	switch (active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case WL_GLUE_BUS_TYPE_SSB:
+		dma_dev = ((struct ssb_device *)dev)->dma_dev;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case WL_GLUE_BUS_TYPE_BCMA:
+		dma_dev = ((struct bcma_device *)dev)->dma_dev;
+		break;
+#endif /* CONFIG_BCMA */
+
+	default:
+		BUG();
+		dma_dev = NULL;
+		break;
+	}
+
+	return dma_dev;
+}
+EXPORT_SYMBOL(wl_glue_get_dmadev);
+
+
+static int __init wl_glue_init(void)
+{
+#ifdef CONFIG_BCM47XX
+	/*
+	 * BCM47xx currently supports either SSB or BCMA bus,
+	 * determine the used one from the info set by the
+	 * platform setup code.
+	 */
+	switch (bcm47xx_active_bus_type)
+	{
+#ifdef CONFIG_SSB
+	case BCM47XX_BUS_TYPE_SSB:
+		active_bus_type = WL_GLUE_BUS_TYPE_SSB;
+		break;
+#endif /* CONFIG_SSB */
+
+#ifdef CONFIG_BCMA
+	case BCM47XX_BUS_TYPE_BCMA:
+		active_bus_type = WL_GLUE_BUS_TYPE_BCMA;
+		break;
+#endif /* CONFIG_BCMA */
+	}
+#endif /* CONFIG_BCM47XX */
+
+#ifdef CONFIG_BCM63XX
+#ifdef CONFIG_SSB
+	/*
+	 * BCM63xx currently only uses SSB, so assume that.
+	 */
+	active_bus_type = WL_GLUE_BUS_TYPE_SSB;
+#endif /* CONFIG_SSB */
+#endif /* CONFIG_BCM63XX */
+
+	/* do not fail here, let wl_glue_register() return -ENOSYS later */
+	if (active_bus_type == WL_GLUE_BUS_TYPE_UNSPEC)
+		pr_err("Unable to determine used system bus type\n");
+
+	return 0;
+}
+
+static void __exit wl_glue_exit(void)
+{
+	if (wl_glue_attached)
+	{
+		if (wl_glue_unregister())
+			pr_err("Failed to unregister glue driver\n");
+
+		wl_glue_attached = 0;
+	}
+
+	return;
+}
+
+module_init(wl_glue_init);
+module_exit(wl_glue_exit);