141 lines
2.9 KiB
C
141 lines
2.9 KiB
C
/*
|
|
* 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>");
|