diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/hw_random/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/char/hw_random/Makefile | 1 | ||||
| -rw-r--r-- | drivers/char/hw_random/pasemi-rng.c | 156 | ||||
| -rw-r--r-- | drivers/char/pcmcia/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/char/pcmcia/cm4000_cs.c | 44 | ||||
| -rw-r--r-- | drivers/char/pcmcia/cm4040_cs.c | 7 | ||||
| -rw-r--r-- | drivers/char/tty_io.c | 14 |
7 files changed, 198 insertions, 39 deletions
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig index 5f3acd8e64b8..7cda04b33534 100644 --- a/drivers/char/hw_random/Kconfig +++ b/drivers/char/hw_random/Kconfig @@ -91,3 +91,17 @@ config HW_RANDOM_OMAP module will be called omap-rng. If unsure, say Y. + +config HW_RANDOM_PASEMI + tristate "PA Semi HW Random Number Generator support" + depends on HW_RANDOM && PPC_PASEMI + default HW_RANDOM + ---help--- + This driver provides kernel-side support for the Random Number + Generator hardware found on PA6T-1682M processor. + + To compile this driver as a module, choose M here: the + module will be called pasemi-rng. + + If unsure, say Y. + diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile index c41fa19454e3..c8b7300e2fb1 100644 --- a/drivers/char/hw_random/Makefile +++ b/drivers/char/hw_random/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_HW_RANDOM_GEODE) += geode-rng.o obj-$(CONFIG_HW_RANDOM_VIA) += via-rng.o obj-$(CONFIG_HW_RANDOM_IXP4XX) += ixp4xx-rng.o obj-$(CONFIG_HW_RANDOM_OMAP) += omap-rng.o +obj-$(CONFIG_HW_RANDOM_PASEMI) += pasemi-rng.o diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c new file mode 100644 index 000000000000..fa6040b6c8f2 --- /dev/null +++ b/drivers/char/hw_random/pasemi-rng.c @@ -0,0 +1,156 @@ +/* + * Copyright (C) 2006-2007 PA Semi, Inc + * + * Maintained by: Olof Johansson <olof@lixom.net> + * + * Driver for the PWRficient onchip rng + * + * 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. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/hw_random.h> +#include <asm/of_platform.h> +#include <asm/io.h> + +#define SDCRNG_CTL_REG 0x00 +#define SDCRNG_CTL_FVLD_M 0x0000f000 +#define SDCRNG_CTL_FVLD_S 12 +#define SDCRNG_CTL_KSZ 0x00000800 +#define SDCRNG_CTL_RSRC_CRG 0x00000010 +#define SDCRNG_CTL_RSRC_RRG 0x00000000 +#define SDCRNG_CTL_CE 0x00000004 +#define SDCRNG_CTL_RE 0x00000002 +#define SDCRNG_CTL_DR 0x00000001 +#define SDCRNG_CTL_SELECT_RRG_RNG (SDCRNG_CTL_RE | SDCRNG_CTL_RSRC_RRG) +#define SDCRNG_CTL_SELECT_CRG_RNG (SDCRNG_CTL_CE | SDCRNG_CTL_RSRC_CRG) +#define SDCRNG_VAL_REG 0x20 + +#define MODULE_NAME "pasemi_rng" + +static int pasemi_rng_data_present(struct hwrng *rng) +{ + void __iomem *rng_regs = (void __iomem *)rng->priv; + + return (in_le32(rng_regs + SDCRNG_CTL_REG) + & SDCRNG_CTL_FVLD_M) ? 1 : 0; +} + +static int pasemi_rng_data_read(struct hwrng *rng, u32 *data) +{ + void __iomem *rng_regs = (void __iomem *)rng->priv; + *data = in_le32(rng_regs + SDCRNG_VAL_REG); + return 4; +} + +static int pasemi_rng_init(struct hwrng *rng) +{ + void __iomem *rng_regs = (void __iomem *)rng->priv; + u32 ctl; + + ctl = SDCRNG_CTL_DR | SDCRNG_CTL_SELECT_RRG_RNG | SDCRNG_CTL_KSZ; + out_le32(rng_regs + SDCRNG_CTL_REG, ctl); + out_le32(rng_regs + SDCRNG_CTL_REG, ctl & ~SDCRNG_CTL_DR); + + return 0; +} + +static void pasemi_rng_cleanup(struct hwrng *rng) +{ + void __iomem *rng_regs = (void __iomem *)rng->priv; + u32 ctl; + + ctl = SDCRNG_CTL_RE | SDCRNG_CTL_CE; + out_le32(rng_regs + SDCRNG_CTL_REG, + in_le32(rng_regs + SDCRNG_CTL_REG) & ~ctl); +} + +static struct hwrng pasemi_rng = { + .name = MODULE_NAME, + .init = pasemi_rng_init, + .cleanup = pasemi_rng_cleanup, + .data_present = pasemi_rng_data_present, + .data_read = pasemi_rng_data_read, +}; + +static int __devinit rng_probe(struct of_device *ofdev, + const struct of_device_id *match) +{ + void __iomem *rng_regs; + struct device_node *rng_np = ofdev->node; + struct resource res; + int err = 0; + + err = of_address_to_resource(rng_np, 0, &res); + if (err) + return -ENODEV; + + rng_regs = ioremap(res.start, 0x100); + + if (!rng_regs) + return -ENOMEM; + + pasemi_rng.priv = (unsigned long)rng_regs; + + printk(KERN_INFO "Registering PA Semi RNG\n"); + + err = hwrng_register(&pasemi_rng); + + if (err) + iounmap(rng_regs); + + return err; +} + +static int __devexit rng_remove(struct of_device *dev) +{ + void __iomem *rng_regs = (void __iomem *)pasemi_rng.priv; + + hwrng_unregister(&pasemi_rng); + iounmap(rng_regs); + + return 0; +} + +static struct of_device_id rng_match[] = { + { + .compatible = "1682m-rng", + }, + {}, +}; + +static struct of_platform_driver rng_driver = { + .name = "pasemi-rng", + .match_table = rng_match, + .probe = rng_probe, + .remove = rng_remove, +}; + +static int __init rng_init(void) +{ + return of_register_platform_driver(&rng_driver); +} +module_init(rng_init); + +static void __exit rng_exit(void) +{ + of_unregister_platform_driver(&rng_driver); +} +module_exit(rng_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>"); +MODULE_DESCRIPTION("H/W RNG driver for PA Semi processor"); diff --git a/drivers/char/pcmcia/Kconfig b/drivers/char/pcmcia/Kconfig index 27c1179ee527..f25facd97bb4 100644 --- a/drivers/char/pcmcia/Kconfig +++ b/drivers/char/pcmcia/Kconfig @@ -21,6 +21,7 @@ config SYNCLINK_CS config CARDMAN_4000 tristate "Omnikey Cardman 4000 support" depends on PCMCIA + select BITREVERSE help Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard reader. diff --git a/drivers/char/pcmcia/cm4000_cs.c b/drivers/char/pcmcia/cm4000_cs.c index e91b43a014b0..561d0e151d0f 100644 --- a/drivers/char/pcmcia/cm4000_cs.c +++ b/drivers/char/pcmcia/cm4000_cs.c @@ -31,6 +31,7 @@ #include <linux/init.h> #include <linux/fs.h> #include <linux/delay.h> +#include <linux/bitrev.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -194,41 +195,17 @@ static inline unsigned char xinb(unsigned short port) } #endif -#define b_0000 15 -#define b_0001 14 -#define b_0010 13 -#define b_0011 12 -#define b_0100 11 -#define b_0101 10 -#define b_0110 9 -#define b_0111 8 -#define b_1000 7 -#define b_1001 6 -#define b_1010 5 -#define b_1011 4 -#define b_1100 3 -#define b_1101 2 -#define b_1110 1 -#define b_1111 0 - -static unsigned char irtab[16] = { - b_0000, b_1000, b_0100, b_1100, - b_0010, b_1010, b_0110, b_1110, - b_0001, b_1001, b_0101, b_1101, - b_0011, b_1011, b_0111, b_1111 -}; +static inline unsigned char invert_revert(unsigned char ch) +{ + return bitrev8(~ch); +} static void str_invert_revert(unsigned char *b, int len) { int i; for (i = 0; i < len; i++) - b[i] = (irtab[b[i] & 0x0f] << 4) | irtab[b[i] >> 4]; -} - -static unsigned char invert_revert(unsigned char ch) -{ - return (irtab[ch & 0x0f] << 4) | irtab[ch >> 4]; + b[i] = invert_revert(b[i]); } #define ATRLENCK(dev,pos) \ @@ -1881,8 +1858,11 @@ static int cm4000_probe(struct pcmcia_device *link) init_waitqueue_head(&dev->readq); ret = cm4000_config(link, i); - if (ret) + if (ret) { + dev_table[i] = NULL; + kfree(dev); return ret; + } class_device_create(cmm_class, NULL, MKDEV(major, i), NULL, "cmm%d", i); @@ -1907,7 +1887,7 @@ static void cm4000_detach(struct pcmcia_device *link) cm4000_release(link); dev_table[devno] = NULL; - kfree(dev); + kfree(dev); class_device_destroy(cmm_class, MKDEV(major, devno)); @@ -1956,12 +1936,14 @@ static int __init cmm_init(void) if (major < 0) { printk(KERN_WARNING MODULE_NAME ": could not get major number\n"); + class_destroy(cmm_class); return major; } rc = pcmcia_register_driver(&cm4000_driver); if (rc < 0) { unregister_chrdev(major, DEVICE_NAME); + class_destroy(cmm_class); return rc; } diff --git a/drivers/char/pcmcia/cm4040_cs.c b/drivers/char/pcmcia/cm4040_cs.c index f2e4ec4fd407..af88181a17f4 100644 --- a/drivers/char/pcmcia/cm4040_cs.c +++ b/drivers/char/pcmcia/cm4040_cs.c @@ -636,8 +636,11 @@ static int reader_probe(struct pcmcia_device *link) setup_timer(&dev->poll_timer, cm4040_do_poll, 0); ret = reader_config(link, i); - if (ret) + if (ret) { + dev_table[i] = NULL; + kfree(dev); return ret; + } class_device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i); @@ -708,12 +711,14 @@ static int __init cm4040_init(void) if (major < 0) { printk(KERN_WARNING MODULE_NAME ": could not get major number\n"); + class_destroy(cmx_class); return major; } rc = pcmcia_register_driver(&reader_driver); if (rc < 0) { unregister_chrdev(major, DEVICE_NAME); + class_destroy(cmx_class); return rc; } diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index 7710a6a77d97..bf5a00145c0b 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -934,13 +934,6 @@ restart: return -EINVAL; /* - * No more input please, we are switching. The new ldisc - * will update this value in the ldisc open function - */ - - tty->receive_room = 0; - - /* * Problem: What do we do if this blocks ? */ @@ -951,6 +944,13 @@ restart: return 0; } + /* + * No more input please, we are switching. The new ldisc + * will update this value in the ldisc open function + */ + + tty->receive_room = 0; + o_ldisc = tty->ldisc; o_tty = tty->link; |