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-rw-r--r--drivers/uio/Kconfig23
-rw-r--r--drivers/uio/Makefile1
-rw-r--r--drivers/uio/uio.c36
-rw-r--r--drivers/uio/uio_cif.c6
-rw-r--r--drivers/uio/uio_smx.c140
5 files changed, 181 insertions, 25 deletions
diff --git a/drivers/uio/Kconfig b/drivers/uio/Kconfig
index b778ed71f63..a4aaab9c7dd 100644
--- a/drivers/uio/Kconfig
+++ b/drivers/uio/Kconfig
@@ -1,8 +1,6 @@
-menu "Userspace I/O"
- depends on !S390
-
-config UIO
+menuconfig UIO
tristate "Userspace I/O drivers"
+ depends on !S390
default n
help
Enable this to allow the userspace driver core code to be
@@ -13,6 +11,8 @@ config UIO
If you don't know what to do here, say N.
+if UIO
+
config UIO_CIF
tristate "generic Hilscher CIF Card driver"
depends on UIO && PCI
@@ -26,4 +26,17 @@ config UIO_CIF
To compile this driver as a module, choose M here: the module
will be called uio_cif.
-endmenu
+config UIO_SMX
+ tristate "SMX cryptengine UIO interface"
+ depends on UIO
+ default n
+ help
+ Userspace IO interface to the Cryptography engine found on the
+ Nias Digital SMX boards. These will be available from Q4 2008
+ from http://www.niasdigital.com. The userspace part of this
+ driver will be released under the GPL at the same time as the
+ hardware and will be able to be downloaded from the same site.
+
+ If you compile this as a module, it will be called uio_smx.
+
+endif
diff --git a/drivers/uio/Makefile b/drivers/uio/Makefile
index 7fecfb459da..18c45662431 100644
--- a/drivers/uio/Makefile
+++ b/drivers/uio/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_UIO) += uio.o
obj-$(CONFIG_UIO_CIF) += uio_cif.o
+obj-$(CONFIG_UIO_SMX) += uio_smx.o
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c
index 11759080ca5..55cc7b80422 100644
--- a/drivers/uio/uio.c
+++ b/drivers/uio/uio.c
@@ -301,23 +301,33 @@ static int uio_open(struct inode *inode, struct file *filep)
if (!idev)
return -ENODEV;
+ if (!try_module_get(idev->owner))
+ return -ENODEV;
+
listener = kmalloc(sizeof(*listener), GFP_KERNEL);
- if (!listener)
- return -ENOMEM;
+ if (!listener) {
+ ret = -ENOMEM;
+ goto err_alloc_listener;
+ }
listener->dev = idev;
listener->event_count = atomic_read(&idev->event);
filep->private_data = listener;
if (idev->info->open) {
- if (!try_module_get(idev->owner))
- return -ENODEV;
ret = idev->info->open(idev->info, inode);
- module_put(idev->owner);
+ if (ret)
+ goto err_infoopen;
}
- if (ret)
- kfree(listener);
+ return 0;
+
+err_infoopen:
+
+ kfree(listener);
+err_alloc_listener:
+
+ module_put(idev->owner);
return ret;
}
@@ -336,12 +346,11 @@ static int uio_release(struct inode *inode, struct file *filep)
struct uio_listener *listener = filep->private_data;
struct uio_device *idev = listener->dev;
- if (idev->info->release) {
- if (!try_module_get(idev->owner))
- return -ENODEV;
+ if (idev->info->release)
ret = idev->info->release(idev->info, inode);
- module_put(idev->owner);
- }
+
+ module_put(idev->owner);
+
if (filep->f_flags & FASYNC)
ret = uio_fasync(-1, filep, 0);
kfree(listener);
@@ -510,10 +519,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma)
return -EINVAL;
if (idev->info->mmap) {
- if (!try_module_get(idev->owner))
- return -ENODEV;
ret = idev->info->mmap(idev->info, vma);
- module_put(idev->owner);
return ret;
}
diff --git a/drivers/uio/uio_cif.c b/drivers/uio/uio_cif.c
index 838bae46083..57376060b97 100644
--- a/drivers/uio/uio_cif.c
+++ b/drivers/uio/uio_cif.c
@@ -15,10 +15,6 @@
#include <asm/io.h>
-#ifndef PCI_DEVICE_ID_PLX_9030
-#define PCI_DEVICE_ID_PLX_9030 0x9030
-#endif
-
#define PLX9030_INTCSR 0x4C
#define INTSCR_INT1_ENABLE 0x01
#define INTSCR_INT1_STATUS 0x04
@@ -116,7 +112,7 @@ static void hilscher_pci_remove(struct pci_dev *dev)
kfree (info);
}
-static struct pci_device_id hilscher_pci_ids[] = {
+static struct pci_device_id hilscher_pci_ids[] __devinitdata = {
{
.vendor = PCI_VENDOR_ID_PLX,
.device = PCI_DEVICE_ID_PLX_9030,
diff --git a/drivers/uio/uio_smx.c b/drivers/uio/uio_smx.c
new file mode 100644
index 00000000000..44054a650a8
--- /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>");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-20 18:48:46 +0000