1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/uio/uio_smx.c b/drivers/uio/uio_smx.c
new file mode 100644
index 000000000000..44054a650a8a
--- /dev/null
+++ b/drivers/uio/uio_smx.c
@@ -0,0 +1,140 @@
+/*
+ * UIO SMX Cryptengine driver.
+ *
+ * (C) 2008 Nias Digital P/L <bn@niasdigital.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/uio_driver.h>
+#include <linux/io.h>
+
+#define DRV_NAME "smx-ce"
+#define DRV_VERSION "0.03"
+
+#define SMX_CSR  0x00000000
+#define SMX_EnD  0x00000001
+#define SMX_RUN  0x00000002
+#define SMX_DRDY 0x00000004
+#define SMX_ERR  0x00000008
+
+static irqreturn_t smx_handler(int irq, struct uio_info *dev_info)
+{
+        void __iomem *csr = dev_info->mem[0].internal_addr + SMX_CSR;
+
+        u32 status = ioread32(csr);
+
+        if (!(status & SMX_DRDY))
+                return IRQ_NONE;
+
+        /* Disable interrupt */
+        iowrite32(status & ~SMX_DRDY, csr);
+        return IRQ_HANDLED;
+}
+
+static int __devinit smx_ce_probe(struct platform_device *dev)
+{
+
+        int ret = -ENODEV;
+        struct uio_info *info;
+        struct resource *regs;
+
+        info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        regs = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        if (!regs) {
+                dev_err(&dev->dev, "No memory resource specified\n");
+                goto out_free;
+        }
+
+        info->mem[0].addr = regs->start;
+        if (!info->mem[0].addr) {
+                dev_err(&dev->dev, "Invalid memory resource\n");
+                goto out_free;
+        }
+
+        info->mem[0].size = regs->end - regs->start + 1;
+        info->mem[0].internal_addr = ioremap(regs->start, info->mem[0].size);
+
+        if (!info->mem[0].internal_addr) {
+                dev_err(&dev->dev, "Can't remap memory address range\n");
+                goto out_free;
+        }
+
+        info->mem[0].memtype = UIO_MEM_PHYS;
+
+        info->name = "smx-ce";
+        info->version = "0.03";
+
+        info->irq = platform_get_irq(dev, 0);
+        if (info->irq < 0) {
+                ret = info->irq;
+                dev_err(&dev->dev, "No (or invalid) IRQ resource specified\n");
+                goto out_unmap;
+        }
+
+        info->irq_flags = IRQF_SHARED;
+        info->handler = smx_handler;
+
+        platform_set_drvdata(dev, info);
+
+        ret = uio_register_device(&dev->dev, info);
+
+        if (ret)
+                goto out_unmap;
+
+        return 0;
+
+out_unmap:
+        iounmap(info->mem[0].internal_addr);
+out_free:
+        kfree(info);
+
+        return ret;
+}
+
+static int __devexit smx_ce_remove(struct platform_device *dev)
+{
+        struct uio_info *info = platform_get_drvdata(dev);
+
+        uio_unregister_device(info);
+        platform_set_drvdata(dev, NULL);
+        iounmap(info->mem[0].internal_addr);
+
+        kfree(info);
+
+        return 0;
+}
+
+static struct platform_driver smx_ce_driver = {
+        .probe          = smx_ce_probe,
+        .remove         = __devexit_p(smx_ce_remove),
+        .driver         = {
+                .name   = DRV_NAME,
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init smx_ce_init_module(void)
+{
+        return platform_driver_register(&smx_ce_driver);
+}
+module_init(smx_ce_init_module);
+
+static void __exit smx_ce_exit_module(void)
+{
+        platform_driver_unregister(&smx_ce_driver);
+}
+module_exit(smx_ce_exit_module);
+
+MODULE_LICENSE("GPL v2");
+MODULE_VERSION(DRV_VERSION);
+MODULE_AUTHOR("Ben Nizette <bn@niasdigital.com>");