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/*******************************************************************************
*
* Copyright (c) 2008 Loc Ho <lho@amcc.com>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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.
*
*
* Detail Description:
* This file defines ioctl structures for the Linux CryptoAPI interface. It
* provides user space applications accesss into the Linux CryptoAPI
* functionalities.
*
* @file pka4xx_acccess.c
*
* This file provides access and implementation of the PKA hardware
* under Linux.
*
*******************************************************************************
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/interrupt.h>
#include <asm/io.h>
#include <crypto/pka_4xx.h>
#include "pka_4xx_access.h"
#define PKA4XX_VER_STR "0.1"
struct pka4xx_dev {
struct pka4xx_ctx ctx;
struct resource csr_res;
struct resource pka_ram_res;
};
struct hal_config {
struct of_device *ofdev;
};
static struct pka4xx_dev pka_dev = {
.ctx = {
0,
{ { 1, PKA4XX_RAM_FREE_SIZE/4, 0 },
{ 0, 0, 0 } },
0, 0
}
};
struct pka4xx_ctx *pka_get_ctx(void)
{
return &pka_dev.ctx;
}
int pka4xx_config_set(struct hal_config *cfg)
{
struct device_node *pka_np = cfg->ofdev->node;
int rc = 0;
rc = of_address_to_resource(pka_np, 0, &pka_dev.csr_res);
if (rc) {
LPRINTF(LL_INFO, "error getting address to resource");
return -ENODEV;
}
pka_dev.ctx.csr_paddr = pka_dev.csr_res.start;
pka_dev.ctx.csr = ioremap(pka_dev.csr_res.start,
pka_dev.csr_res.end - pka_dev.csr_res.start + 1);
if (pka_dev.ctx.csr == NULL) {
LPRINTF(LL_ERR,
"unable to ioremap 0x%02X_%08X size %d",
(u32) (pka_dev.csr_res.start >> 32),
(u32) pka_dev.csr_res.start,
(u32) (pka_dev.csr_res.end - pka_dev.csr_res.start + 1));
return -ENOMEM;
}
pka_dev.ctx.irq = of_irq_to_resource(pka_np, 0, NULL);
if (pka_dev.ctx.irq == NO_IRQ) {
/* Un-map CSR */
iounmap(pka_dev.ctx.csr);
pka_dev.ctx.csr = NULL;
LPRINTF(LL_ERR, "no irq");
return -EINVAL;
}
return 0;
}
int pka4xx_config_clear(void)
{
iounmap(pka_dev.ctx.csr);
return 0;
}
int pka4xx_csr_hw_read32(u32 reg_addr, u32 *data_val)
{
*data_val = in_le32((volatile unsigned __iomem *)
(pka_dev.ctx.csr + reg_addr));
return 0;
}
int pka4xx_csr_hw_write32(u32 reg_addr, u32 data_val)
{
out_le32((volatile unsigned __iomem *) (pka_dev.ctx.csr + reg_addr),
data_val);
return 0;
}
/**
* Setup Driver with platform registration
*/
static int __devinit pka4xx_probe(struct of_device *ofdev,
const struct of_device_id *match)
{
struct hal_config hw_cfg;
int rc;
hw_cfg.ofdev = ofdev;
rc = pka4xx_config_set(&hw_cfg);
if (rc != 0)
return rc;
printk(KERN_INFO "AMCC 4xx PKA v%s @0x%02X_%08X size %d IRQ %d\n",
PKA4XX_VER_STR,
(u32) (pka_dev.csr_res.start >> 32),
(u32) pka_dev.csr_res.start,
(u32) (pka_dev.csr_res.end - pka_dev.csr_res.start + 1),
pka_dev.ctx.irq);
rc = pka4xx_hw_init();
if (rc < 0) {
LPRINTF(LL_ERR, "failed to initialize PKA");
goto err;
}
printk(KERN_INFO "PKA Driver Successfully Initialized\n");
return rc;
err:
pka4xx_config_clear();
return rc;
}
static int __devexit pka4xx_remove(struct of_device *dev)
{
pka4xx_hw_deinit();
pka4xx_config_clear();
return 0;
}
static struct of_device_id pka4xx_match[] = {
{ .compatible = "ppc4xx-pka", },
{ .compatible = "amcc,ppc4xx-pka", },
{ },
};
static struct of_platform_driver pka4xx_driver = {
.name = "ppc4xx-pka",
.match_table = pka4xx_match,
.probe = pka4xx_probe,
.remove = pka4xx_remove,
};
static int __init mod_init(void)
{
return of_register_platform_driver(&pka4xx_driver);
}
static void __exit mod_exit(void)
{
of_unregister_platform_driver(&pka4xx_driver);
}
module_init(mod_init);
module_exit(mod_exit);
MODULE_DESCRIPTION("AMCC 4xx Public Key Accelerator");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL_GPL(pka4xx_mul);
EXPORT_SYMBOL_GPL(pka4xx_div);
EXPORT_SYMBOL_GPL(pka4xx_mod);
EXPORT_SYMBOL_GPL(pka4xx_add);
EXPORT_SYMBOL_GPL(pka4xx_sub);
EXPORT_SYMBOL_GPL(pka4xx_addsub);
EXPORT_SYMBOL_GPL(pka4xx_rshift);
EXPORT_SYMBOL_GPL(pka4xx_lshift);
EXPORT_SYMBOL_GPL(pka4xx_compare);
EXPORT_SYMBOL_GPL(pka4xx_expmod);
EXPORT_SYMBOL_GPL(pka4xx_expmod_crt);
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