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author | Imre Kaloz <kaloz@openwrt.org> | 2010-02-22 13:54:47 +0000 |
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committer | Imre Kaloz <kaloz@openwrt.org> | 2010-02-22 13:54:47 +0000 |
commit | 212a481ea99ac04e2d3415cf3627362ead9a277d (patch) | |
tree | 1bbe491ef9470b8edd7be199072539d7e18a1996 /target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c | |
parent | 73f82eb93e48c01ee58eb27031e204332da54cd8 (diff) | |
download | upstream-212a481ea99ac04e2d3415cf3627362ead9a277d.tar.gz upstream-212a481ea99ac04e2d3415cf3627362ead9a277d.tar.bz2 upstream-212a481ea99ac04e2d3415cf3627362ead9a277d.zip |
[ubicom32]: move new files out from platform support patch
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19815 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c')
-rw-r--r-- | target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c b/target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c new file mode 100644 index 0000000000..e429589897 --- /dev/null +++ b/target/linux/ubicom32/files/drivers/char/hw_random/ubicom32-rng.c @@ -0,0 +1,105 @@ +/* + * drivers/net/ubi32-eth.c + * Ubicom32 hardware random number generator driver. + * + * (C) Copyright 2009, Ubicom, Inc. + * + * This file is part of the Ubicom32 Linux Kernel Port. + * + * The Ubicom32 Linux Kernel Port 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. + * + * The Ubicom32 Linux Kernel Port 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. + * + * You should have received a copy of the GNU General Public License + * along with the Ubicom32 Linux Kernel Port. If not, + * see <http://www.gnu.org/licenses/>. + * + * Ubicom32 implementation derived from (with many thanks): + * arch/m68knommu + * arch/blackfin + * arch/parisc + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/hw_random.h> +#include <linux/delay.h> +#include <asm/io.h> +#include <asm/ip5000.h> + +#define MODULE_NAME "ubicom32_rng" + +static int ubicom32_rng_data_present(struct hwrng *rng, int wait) +{ + int data, i; + + for (i = 0; i < 20; i++) { + data = *(int *)(TIMER_BASE + TIMER_TRN); + if (data || !wait) + break; + udelay(10); + } + return data; +} + +static int ubicom32_rng_data_read(struct hwrng *rng, u32 *data) +{ + *data = *(int *)(TIMER_BASE + TIMER_TRN); + return 4; +} + +static int ubicom32_rng_init(struct hwrng *rng) +{ + printk(KERN_INFO "ubicom32 rng init\n"); + *(int *)(TIMER_BASE + TIMER_TRN_CFG) = TIMER_TRN_CFG_ENABLE_OSC; + return 0; +} + +static void ubicom32_rng_cleanup(struct hwrng *rng) +{ + printk(KERN_INFO "ubicom32 rng cleanup\n"); + *(int *)(TIMER_BASE + TIMER_TRN_CFG) = 0; +} + +static struct hwrng ubicom32_rng = { + .name = MODULE_NAME, + .init = ubicom32_rng_init, + .cleanup = ubicom32_rng_cleanup, + .data_present = ubicom32_rng_data_present, + .data_read = ubicom32_rng_data_read, + .priv = 0, +}; + +static int __init mod_init(void) +{ + int err; + + printk(KERN_INFO "ubicom32 rng started\n"); + err = hwrng_register(&ubicom32_rng); + if (err) { + printk(KERN_ERR "ubicom32 rng register failed (%d)\n", + err); + } + + return err; +} + +static void __exit mod_exit(void) +{ + printk(KERN_INFO "ubicom32 rng stopped\n"); + hwrng_unregister(&ubicom32_rng); +} + +module_init(mod_init); +module_exit(mod_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ubicom, Inc."); +MODULE_DESCRIPTION("H/W rng driver for ubicom32 processor"); +MODULE_VERSION("1:1.0.a"); |