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path: root/drivers/net/can/sja1000/sja1000_platform.c
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Diffstat (limited to 'drivers/net/can/sja1000/sja1000_platform.c')
-rw-r--r--drivers/net/can/sja1000/sja1000_platform.c165
1 files changed, 165 insertions, 0 deletions
diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
new file mode 100644
index 00000000000..628374c2a05
--- /dev/null
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2005 Sascha Hauer, Pengutronix
+ * Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the version 2 of the GNU General Public License
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/can.h>
+#include <linux/can/dev.h>
+#include <linux/can/platform/sja1000.h>
+#include <linux/io.h>
+
+#include "sja1000.h"
+
+#define DRV_NAME "sja1000_platform"
+
+MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
+MODULE_DESCRIPTION("Socket-CAN driver for SJA1000 on the platform bus");
+MODULE_LICENSE("GPL v2");
+
+static u8 sp_read_reg(const struct sja1000_priv *priv, int reg)
+{
+ return ioread8(priv->reg_base + reg);
+}
+
+static void sp_write_reg(const struct sja1000_priv *priv, int reg, u8 val)
+{
+ iowrite8(val, priv->reg_base + reg);
+}
+
+static int sp_probe(struct platform_device *pdev)
+{
+ int err;
+ void __iomem *addr;
+ struct net_device *dev;
+ struct sja1000_priv *priv;
+ struct resource *res_mem, *res_irq;
+ struct sja1000_platform_data *pdata;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "No platform data provided!\n");
+ err = -ENODEV;
+ goto exit;
+ }
+
+ res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_mem || !res_irq) {
+ err = -ENODEV;
+ goto exit;
+ }
+
+ if (!request_mem_region(res_mem->start, resource_size(res_mem),
+ DRV_NAME)) {
+ err = -EBUSY;
+ goto exit;
+ }
+
+ addr = ioremap_nocache(res_mem->start, resource_size(res_mem));
+ if (!addr) {
+ err = -ENOMEM;
+ goto exit_release;
+ }
+
+ dev = alloc_sja1000dev(0);
+ if (!dev) {
+ err = -ENOMEM;
+ goto exit_iounmap;
+ }
+ priv = netdev_priv(dev);
+
+ dev->irq = res_irq->start;
+ priv->irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
+ priv->reg_base = addr;
+ priv->read_reg = sp_read_reg;
+ priv->write_reg = sp_write_reg;
+ priv->can.clock.freq = pdata->clock;
+ priv->ocr = pdata->ocr;
+ priv->cdr = pdata->cdr;
+
+ dev_set_drvdata(&pdev->dev, dev);
+ SET_NETDEV_DEV(dev, &pdev->dev);
+
+ err = register_sja1000dev(dev);
+ if (err) {
+ dev_err(&pdev->dev, "registering %s failed (err=%d)\n",
+ DRV_NAME, err);
+ goto exit_free;
+ }
+
+ dev_info(&pdev->dev, "%s device registered (reg_base=%p, irq=%d)\n",
+ DRV_NAME, priv->reg_base, dev->irq);
+ return 0;
+
+ exit_free:
+ free_sja1000dev(dev);
+ exit_iounmap:
+ iounmap(addr);
+ exit_release:
+ release_mem_region(res_mem->start, resource_size(res_mem));
+ exit:
+ return err;
+}
+
+static int sp_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = dev_get_drvdata(&pdev->dev);
+ struct sja1000_priv *priv = netdev_priv(dev);
+ struct resource *res;
+
+ unregister_sja1000dev(dev);
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ if (priv->reg_base)
+ iounmap(priv->reg_base);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(res->start, resource_size(res));
+
+ free_sja1000dev(dev);
+
+ return 0;
+}
+
+static struct platform_driver sp_driver = {
+ .probe = sp_probe,
+ .remove = sp_remove,
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init sp_init(void)
+{
+ return platform_driver_register(&sp_driver);
+}
+
+static void __exit sp_exit(void)
+{
+ platform_driver_unregister(&sp_driver);
+}
+
+module_init(sp_init);
+module_exit(sp_exit);