Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/drivers/mcb/mcb-pci.c b/drivers/mcb/mcb-pci.c
new file mode 100644
index 000000000..c2d69e33b
--- /dev/null
+++ b/drivers/mcb/mcb-pci.c
@@ -0,0 +1,136 @@
+/*
+ * MEN Chameleon Bus.
+ *
+ * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
+ * Author: Johannes Thumshirn <johannes.thumshirn@men.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; version 2 of the License.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/mcb.h>
+
+#include "mcb-internal.h"
+
+struct priv {
+	struct mcb_bus *bus;
+	phys_addr_t mapbase;
+	void __iomem *base;
+};
+
+static int mcb_pci_get_irq(struct mcb_device *mdev)
+{
+	struct mcb_bus *mbus = mdev->bus;
+	struct device *dev = mbus->carrier;
+	struct pci_dev *pdev = to_pci_dev(dev);
+
+	return pdev->irq;
+}
+
+static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct resource *res;
+	struct priv *priv;
+	int ret;
+	unsigned long flags;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	ret = pci_enable_device(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to enable PCI device\n");
+		return -ENODEV;
+	}
+	pci_set_master(pdev);
+
+	priv->mapbase = pci_resource_start(pdev, 0);
+	if (!priv->mapbase) {
+		dev_err(&pdev->dev, "No PCI resource\n");
+		ret = -ENODEV;
+		goto out_disable;
+	}
+
+	res = devm_request_mem_region(&pdev->dev, priv->mapbase,
+				      CHAM_HEADER_SIZE,
+				      KBUILD_MODNAME);
+	if (!res) {
+		dev_err(&pdev->dev, "Failed to request PCI memory\n");
+		ret = -EBUSY;
+		goto out_disable;
+	}
+
+	priv->base = devm_ioremap(&pdev->dev, priv->mapbase, CHAM_HEADER_SIZE);
+	if (!priv->base) {
+		dev_err(&pdev->dev, "Cannot ioremap\n");
+		ret = -ENOMEM;
+		goto out_disable;
+	}
+
+	flags = pci_resource_flags(pdev, 0);
+	if (flags & IORESOURCE_IO) {
+		ret = -ENOTSUPP;
+		dev_err(&pdev->dev,
+			"IO mapped PCI devices are not supported\n");
+		goto out_disable;
+	}
+
+	pci_set_drvdata(pdev, priv);
+
+	priv->bus = mcb_alloc_bus(&pdev->dev);
+	if (IS_ERR(priv->bus)) {
+		ret = PTR_ERR(priv->bus);
+		goto out_disable;
+	}
+
+	priv->bus->get_irq = mcb_pci_get_irq;
+
+	ret = chameleon_parse_cells(priv->bus, priv->mapbase, priv->base);
+	if (ret < 0)
+		goto out_mcb_bus;
+
+	dev_dbg(&pdev->dev, "Found %d cells\n", ret);
+
+	mcb_bus_add_devices(priv->bus);
+
+	return 0;
+
+out_mcb_bus:
+	mcb_release_bus(priv->bus);
+out_disable:
+	pci_disable_device(pdev);
+	return ret;
+}
+
+static void mcb_pci_remove(struct pci_dev *pdev)
+{
+	struct priv *priv = pci_get_drvdata(pdev);
+
+	mcb_release_bus(priv->bus);
+
+	pci_disable_device(pdev);
+}
+
+static const struct pci_device_id mcb_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ALTERA, PCI_DEVICE_ID_MEN_CHAMELEON) },
+	{ 0 },
+};
+MODULE_DEVICE_TABLE(pci, mcb_pci_tbl);
+
+static struct pci_driver mcb_pci_driver = {
+	.name = "mcb-pci",
+	.id_table = mcb_pci_tbl,
+	.probe = mcb_pci_probe,
+	.remove = mcb_pci_remove,
+};
+
+module_pci_driver(mcb_pci_driver);
+
+MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MCB over PCI support");