Release 4.10 drivers/char/hw_random/geode-rng.c
/*
* RNG driver for AMD Geode RNGs
*
* Copyright 2005 (c) MontaVista Software, Inc.
*
* with the majority of the code coming from:
*
* Hardware driver for the Intel/AMD/VIA Random Number Generators (RNG)
* (c) Copyright 2003 Red Hat Inc <jgarzik@redhat.com>
*
* derived from
*
* Hardware driver for the AMD 768 Random Number Generator (RNG)
* (c) Copyright 2001 Red Hat Inc
*
* derived from
*
* Hardware driver for Intel i810 Random Number Generator (RNG)
* Copyright 2000,2001 Jeff Garzik <jgarzik@pobox.com>
* Copyright 2000,2001 Philipp Rumpf <prumpf@mandrakesoft.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/delay.h>
#include <linux/hw_random.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#define GEODE_RNG_DATA_REG 0x50
#define GEODE_RNG_STATUS_REG 0x54
/*
* Data for PCI driver interface
*
* This data only exists for exporting the supported
* PCI ids via MODULE_DEVICE_TABLE. We do not actually
* register a pci_driver, because someone else might one day
* want to register another driver on the same PCI id.
*/
static const struct pci_device_id pci_tbl[] = {
{ PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_LX_AES), 0, },
{ 0, }, /* terminate list */
};
MODULE_DEVICE_TABLE(pci, pci_tbl);
static int geode_rng_data_read(struct hwrng *rng, u32 *data)
{
void __iomem *mem = (void __iomem *)rng->priv;
*data = readl(mem + GEODE_RNG_DATA_REG);
return 4;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael buesch | michael buesch | 42 | 100.00% | 1 | 100.00% |
| Total | 42 | 100.00% | 1 | 100.00% |
static int geode_rng_data_present(struct hwrng *rng, int wait)
{
void __iomem *mem = (void __iomem *)rng->priv;
int data, i;
for (i = 0; i < 20; i++) {
data = !!(readl(mem + GEODE_RNG_STATUS_REG));
if (data || !wait)
break;
udelay(10);
}
return data;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| patrick mchardy | patrick mchardy | 41 | 53.25% | 1 | 50.00% |
| michael buesch | michael buesch | 36 | 46.75% | 1 | 50.00% |
| Total | 77 | 100.00% | 2 | 100.00% |
static struct hwrng geode_rng = {
.name = "geode",
.data_present = geode_rng_data_present,
.data_read = geode_rng_data_read,
};
static int __init mod_init(void)
{
struct pci_dev *pdev = NULL;
const struct pci_device_id *ent;
void __iomem *mem;
unsigned long rng_base;
for_each_pci_dev(pdev) {
ent = pci_match_id(pci_tbl, pdev);
if (ent) {
rng_base = pci_resource_start(pdev, 0);
if (rng_base == 0)
return -ENODEV;
mem = devm_ioremap(&pdev->dev, rng_base, 0x58);
if (!mem)
return -ENOMEM;
geode_rng.priv = (unsigned long)mem;
pr_info("AMD Geode RNG detected\n");
return devm_hwrng_register(&pdev->dev, &geode_rng);
}
}
/* Device not found. */
return -ENODEV;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael buesch | michael buesch | 98 | 77.78% | 1 | 25.00% |
| prasannakumar muralidharan | prasannakumar muralidharan | 24 | 19.05% | 1 | 25.00% |
| wei yongjun | wei yongjun | 3 | 2.38% | 1 | 25.00% |
| sudip mukherjee | sudip mukherjee | 1 | 0.79% | 1 | 25.00% |
| Total | 126 | 100.00% | 4 | 100.00% |
static void __exit mod_exit(void)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael buesch | michael buesch | 7 | 87.50% | 1 | 50.00% |
| prasannakumar muralidharan | prasannakumar muralidharan | 1 | 12.50% | 1 | 50.00% |
| Total | 8 | 100.00% | 2 | 100.00% |
module_init(mod_init);
module_exit(mod_exit);
MODULE_DESCRIPTION("H/W RNG driver for AMD Geode LX CPUs");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| michael buesch | michael buesch | 272 | 76.40% | 2 | 22.22% |
| patrick mchardy | patrick mchardy | 43 | 12.08% | 1 | 11.11% |
| prasannakumar muralidharan | prasannakumar muralidharan | 31 | 8.71% | 2 | 22.22% |
| joe perches | joe perches | 5 | 1.40% | 1 | 11.11% |
| wei yongjun | wei yongjun | 3 | 0.84% | 1 | 11.11% |
| sudip mukherjee | sudip mukherjee | 1 | 0.28% | 1 | 11.11% |
| alan cox | alan cox | 1 | 0.28% | 1 | 11.11% |
| Total | 356 | 100.00% | 9 | 100.00% |
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