9 files changed, 229 insertions, 14 deletions

diff --git a/drivers/char/hvcs.c b/drivers/char/hvcs.c
index 2724d628527f..266b858b8f85 100644
--- a/drivers/char/hvcs.c
+++ b/drivers/char/hvcs.c
@@ -347,7 +347,7 @@ static void __exit hvcs_module_exit(void);
 
 static inline struct hvcs_struct *from_vio_dev(struct vio_dev *viod)
 {
-        return viod->dev.driver_data;
+        return dev_get_drvdata(&viod->dev);
 }
 /* The sysfs interface for the driver and devices */
 
@@ -785,7 +785,7 @@ static int __devinit hvcs_probe(
         kref_init(&hvcsd->kref);
 
         hvcsd->vdev = dev;
-        dev->dev.driver_data = hvcsd;
+        dev_set_drvdata(&dev->dev, hvcsd);
 
         hvcsd->index = index;
 
@@ -831,7 +831,7 @@ static int __devinit hvcs_probe(
 
 static int __devexit hvcs_remove(struct vio_dev *dev)
 {
-        struct hvcs_struct *hvcsd = dev->dev.driver_data;
+        struct hvcs_struct *hvcsd = dev_get_drvdata(&dev->dev);
         unsigned long flags;
         struct tty_struct *tty;
 
diff --git a/drivers/char/hw_random/Kconfig b/drivers/char/hw_random/Kconfig
index f4b3f7293feb..ce66a70184f7 100644
--- a/drivers/char/hw_random/Kconfig
+++ b/drivers/char/hw_random/Kconfig
@@ -149,6 +149,19 @@ config HW_RANDOM_VIRTIO
           To compile this driver as a module, choose M here: the
           module will be called virtio-rng.  If unsure, say N.
 
+config HW_RANDOM_TX4939
+        tristate "TX4939 Random Number Generator support"
+        depends on HW_RANDOM && SOC_TX4939
+        default HW_RANDOM
+        ---help---
+          This driver provides kernel-side support for the Random Number
+          Generator hardware found on TX4939 SoC.
+
+          To compile this driver as a module, choose M here: the
+          module will be called tx4939-rng.
+
+          If unsure, say Y.
+
 config HW_RANDOM_MXC_RNGA
         tristate "Freescale i.MX RNGA Random Number Generator"
         depends on HW_RANDOM && ARCH_HAS_RNGA
diff --git a/drivers/char/hw_random/Makefile b/drivers/char/hw_random/Makefile
index fd1ecd2f6731..676828ba8123 100644
--- a/drivers/char/hw_random/Makefile
+++ b/drivers/char/hw_random/Makefile
@@ -15,4 +15,5 @@ obj-$(CONFIG_HW_RANDOM_IXP4XX) += ixp4xx-rng.o
 obj-$(CONFIG_HW_RANDOM_OMAP) += omap-rng.o
 obj-$(CONFIG_HW_RANDOM_PASEMI) += pasemi-rng.o
 obj-$(CONFIG_HW_RANDOM_VIRTIO) += virtio-rng.o
+obj-$(CONFIG_HW_RANDOM_TX4939) += tx4939-rng.o
 obj-$(CONFIG_HW_RANDOM_MXC_RNGA) += mxc-rnga.o
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index e5d583c84e4f..fc93e2fc7c71 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -153,6 +153,7 @@ static const struct file_operations rng_chrdev_ops = {
 static struct miscdevice rng_miscdev = {
         .minor          = RNG_MISCDEV_MINOR,
         .name           = RNG_MODULE_NAME,
+        .devnode        = "hwrng",
         .fops           = &rng_chrdev_ops,
 };
 
diff --git a/drivers/char/hw_random/tx4939-rng.c b/drivers/char/hw_random/tx4939-rng.c
new file mode 100644
index 000000000000..544d9085a8e8
--- /dev/null
+++ b/drivers/char/hw_random/tx4939-rng.c
@@ -0,0 +1,184 @@
+/*
+ * RNG driver for TX4939 Random Number Generators (RNG)
+ *
+ * Copyright (C) 2009 Atsushi Nemoto <anemo@mba.ocn.ne.jp>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/hw_random.h>
+
+#define TX4939_RNG_RCSR         0x00000000
+#define TX4939_RNG_ROR(n)       (0x00000018 + (n) * 8)
+
+#define TX4939_RNG_RCSR_INTE    0x00000008
+#define TX4939_RNG_RCSR_RST     0x00000004
+#define TX4939_RNG_RCSR_FIN     0x00000002
+#define TX4939_RNG_RCSR_ST      0x00000001
+
+struct tx4939_rng {
+        struct hwrng rng;
+        void __iomem *base;
+        u64 databuf[3];
+        unsigned int data_avail;
+};
+
+static void rng_io_start(void)
+{
+#ifndef CONFIG_64BIT
+        /*
+         * readq is reading a 64-bit register using a 64-bit load.  On
+         * a 32-bit kernel however interrupts or any other processor
+         * exception would clobber the upper 32-bit of the processor
+         * register so interrupts need to be disabled.
+         */
+        local_irq_disable();
+#endif
+}
+
+static void rng_io_end(void)
+{
+#ifndef CONFIG_64BIT
+        local_irq_enable();
+#endif
+}
+
+static u64 read_rng(void __iomem *base, unsigned int offset)
+{
+        return ____raw_readq(base + offset);
+}
+
+static void write_rng(u64 val, void __iomem *base, unsigned int offset)
+{
+        return ____raw_writeq(val, base + offset);
+}
+
+static int tx4939_rng_data_present(struct hwrng *rng, int wait)
+{
+        struct tx4939_rng *rngdev = container_of(rng, struct tx4939_rng, rng);
+        int i;
+
+        if (rngdev->data_avail)
+                return rngdev->data_avail;
+        for (i = 0; i < 20; i++) {
+                rng_io_start();
+                if (!(read_rng(rngdev->base, TX4939_RNG_RCSR)
+                      & TX4939_RNG_RCSR_ST)) {
+                        rngdev->databuf[0] =
+                                read_rng(rngdev->base, TX4939_RNG_ROR(0));
+                        rngdev->databuf[1] =
+                                read_rng(rngdev->base, TX4939_RNG_ROR(1));
+                        rngdev->databuf[2] =
+                                read_rng(rngdev->base, TX4939_RNG_ROR(2));
+                        rngdev->data_avail =
+                                sizeof(rngdev->databuf) / sizeof(u32);
+                        /* Start RNG */
+                        write_rng(TX4939_RNG_RCSR_ST,
+                                  rngdev->base, TX4939_RNG_RCSR);
+                        wait = 0;
+                }
+                rng_io_end();
+                if (!wait)
+                        break;
+                /* 90 bus clock cycles by default for generation */
+                ndelay(90 * 5);
+        }
+        return rngdev->data_avail;
+}
+
+static int tx4939_rng_data_read(struct hwrng *rng, u32 *buffer)
+{
+        struct tx4939_rng *rngdev = container_of(rng, struct tx4939_rng, rng);
+
+        rngdev->data_avail--;
+        *buffer = *((u32 *)&rngdev->databuf + rngdev->data_avail);
+        return sizeof(u32);
+}
+
+static int __init tx4939_rng_probe(struct platform_device *dev)
+{
+        struct tx4939_rng *rngdev;
+        struct resource *r;
+        int i;
+
+        r = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        if (!r)
+                return -EBUSY;
+        rngdev = devm_kzalloc(&dev->dev, sizeof(*rngdev), GFP_KERNEL);
+        if (!rngdev)
+                return -ENOMEM;
+        if (!devm_request_mem_region(&dev->dev, r->start, resource_size(r),
+                                     dev_name(&dev->dev)))
+                return -EBUSY;
+        rngdev->base = devm_ioremap(&dev->dev, r->start, resource_size(r));
+        if (!rngdev->base)
+                return -EBUSY;
+
+        rngdev->rng.name = dev_name(&dev->dev);
+        rngdev->rng.data_present = tx4939_rng_data_present;
+        rngdev->rng.data_read = tx4939_rng_data_read;
+
+        rng_io_start();
+        /* Reset RNG */
+        write_rng(TX4939_RNG_RCSR_RST, rngdev->base, TX4939_RNG_RCSR);
+        write_rng(0, rngdev->base, TX4939_RNG_RCSR);
+        /* Start RNG */
+        write_rng(TX4939_RNG_RCSR_ST, rngdev->base, TX4939_RNG_RCSR);
+        rng_io_end();
+        /*
+         * Drop first two results.  From the datasheet:
+         * The quality of the random numbers generated immediately
+         * after reset can be insufficient.  Therefore, do not use
+         * random numbers obtained from the first and second
+         * generations; use the ones from the third or subsequent
+         * generation.
+         */
+        for (i = 0; i < 2; i++) {
+                rngdev->data_avail = 0;
+                if (!tx4939_rng_data_present(&rngdev->rng, 1))
+                        return -EIO;
+        }
+
+        platform_set_drvdata(dev, rngdev);
+        return hwrng_register(&rngdev->rng);
+}
+
+static int __exit tx4939_rng_remove(struct platform_device *dev)
+{
+        struct tx4939_rng *rngdev = platform_get_drvdata(dev);
+
+        hwrng_unregister(&rngdev->rng);
+        platform_set_drvdata(dev, NULL);
+        return 0;
+}
+
+static struct platform_driver tx4939_rng_driver = {
+        .driver         = {
+                .name   = "tx4939-rng",
+                .owner  = THIS_MODULE,
+        },
+        .remove = tx4939_rng_remove,
+};
+
+static int __init tx4939rng_init(void)
+{
+        return platform_driver_probe(&tx4939_rng_driver, tx4939_rng_probe);
+}
+
+static void __exit tx4939rng_exit(void)
+{
+        platform_driver_unregister(&tx4939_rng_driver);
+}
+
+module_init(tx4939rng_init);
+module_exit(tx4939rng_exit);
+
+MODULE_DESCRIPTION("H/W Random Number Generator (RNG) driver for TX4939");
+MODULE_LICENSE("GPL");
diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c
index 259644646b82..d2e698096ace 100644
--- a/drivers/char/ipmi/ipmi_si_intf.c
+++ b/drivers/char/ipmi/ipmi_si_intf.c
@@ -2375,14 +2375,14 @@ static int __devinit ipmi_of_probe(struct of_device *dev,
                 info->io.addr_data, info->io.regsize, info->io.regspacing,
                 info->irq);
 
-        dev->dev.driver_data = (void *) info;
+        dev_set_drvdata(&dev->dev, info);
 
         return try_smi_init(info);
 }
 
 static int __devexit ipmi_of_remove(struct of_device *dev)
 {
-        cleanup_one_si(dev->dev.driver_data);
+        cleanup_one_si(dev_get_drvdata(&dev->dev));
         return 0;
 }
 
diff --git a/drivers/char/misc.c b/drivers/char/misc.c
index a5e0db9d7662..62c99fa59e2b 100644
--- a/drivers/char/misc.c
+++ b/drivers/char/misc.c
@@ -168,7 +168,6 @@ static const struct file_operations misc_fops = {
         .open           = misc_open,
 };
 
-
 /**
  *      misc_register   -       register a miscellaneous device
  *      @misc: device structure
@@ -217,8 +216,8 @@ int misc_register(struct miscdevice * misc)
                 misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
         dev = MKDEV(MISC_MAJOR, misc->minor);
 
-        misc->this_device = device_create(misc_class, misc->parent, dev, NULL,
-                                          "%s", misc->name);
+        misc->this_device = device_create(misc_class, misc->parent, dev,
+                                          misc, "%s", misc->name);
         if (IS_ERR(misc->this_device)) {
                 err = PTR_ERR(misc->this_device);
                 goto out;
@@ -264,6 +263,15 @@ int misc_deregister(struct miscdevice *misc)
 EXPORT_SYMBOL(misc_register);
 EXPORT_SYMBOL(misc_deregister);
 
+static char *misc_nodename(struct device *dev)
+{
+        struct miscdevice *c = dev_get_drvdata(dev);
+
+        if (c->devnode)
+                return kstrdup(c->devnode, GFP_KERNEL);
+        return NULL;
+}
+
 static int __init misc_init(void)
 {
         int err;
@@ -279,6 +287,7 @@ static int __init misc_init(void)
         err = -EIO;
         if (register_chrdev(MISC_MAJOR,"misc",&misc_fops))
                 goto fail_printk;
+        misc_class->nodename = misc_nodename;
         return 0;
 
 fail_printk:
diff --git a/drivers/char/raw.c b/drivers/char/raw.c
index db32f0e4c7dd..05f9d18b9361 100644
--- a/drivers/char/raw.c
+++ b/drivers/char/raw.c
@@ -261,6 +261,11 @@ static const struct file_operations raw_ctl_fops = {
 
 static struct cdev raw_cdev;
 
+static char *raw_nodename(struct device *dev)
+{
+        return kasprintf(GFP_KERNEL, "raw/%s", dev_name(dev));
+}
+
 static int __init raw_init(void)
 {
         dev_t dev = MKDEV(RAW_MAJOR, 0);
@@ -284,6 +289,7 @@ static int __init raw_init(void)
                 ret = PTR_ERR(raw_class);
                 goto error_region;
         }
+        raw_class->nodename = raw_nodename;
         device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
 
         return 0;
diff --git a/drivers/char/vt.c b/drivers/char/vt.c
index c796a86ab7f3..d9113b4c76e3 100644
--- a/drivers/char/vt.c
+++ b/drivers/char/vt.c
@@ -171,8 +171,9 @@ int do_poke_blanked_console;
 int console_blanked;
 
 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
-static int blankinterval = 10*60*HZ;
 static int vesa_off_interval;
+static int blankinterval = 10*60;
+core_param(consoleblank, blankinterval, int, 0444);
 
 static DECLARE_WORK(console_work, console_callback);
 
@@ -1485,7 +1486,7 @@ static void setterm_command(struct vc_data *vc)
                         update_attr(vc);
                         break;
                 case 9: /* set blanking interval */
-                        blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ;
+                        blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60;
                         poke_blanked_console();
                         break;
                 case 10: /* set bell frequency in Hz */
@@ -2871,7 +2872,7 @@ static int __init con_init(void)
 
         if (blankinterval) {
                 blank_state = blank_normal_wait;
-                mod_timer(&console_timer, jiffies + blankinterval);
+                mod_timer(&console_timer, jiffies + (blankinterval * HZ));
         }
 
         for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
@@ -3677,7 +3678,7 @@ void do_unblank_screen(int leaving_gfx)
                 return; /* but leave console_blanked != 0 */
 
         if (blankinterval) {
-                mod_timer(&console_timer, jiffies + blankinterval);
+                mod_timer(&console_timer, jiffies + (blankinterval * HZ));
                 blank_state = blank_normal_wait;
         }
 
@@ -3711,7 +3712,7 @@ void unblank_screen(void)
 static void blank_screen_t(unsigned long dummy)
 {
         if (unlikely(!keventd_up())) {
-                mod_timer(&console_timer, jiffies + blankinterval);
+                mod_timer(&console_timer, jiffies + (blankinterval * HZ));
                 return;
         }
         blank_timer_expired = 1;
@@ -3741,7 +3742,7 @@ void poke_blanked_console(void)
         if (console_blanked)
                 unblank_screen();
         else if (blankinterval) {
-                mod_timer(&console_timer, jiffies + blankinterval);
+                mod_timer(&console_timer, jiffies + (blankinterval * HZ));
                 blank_state = blank_normal_wait;
         }
 }