char: remove blackfin OTP driver
The blackfin architecture is getting removed, so we don't need this driver any more. Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Aaron Wu <aaron.wu@analog.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
parent
315e80e7fb
commit
64f5fdd951
|
|
@ -66,34 +66,6 @@ config TTY_PRINTK
|
||||||
|
|
||||||
If unsure, say N.
|
If unsure, say N.
|
||||||
|
|
||||||
config BFIN_OTP
|
|
||||||
tristate "Blackfin On-Chip OTP Memory Support"
|
|
||||||
depends on BLACKFIN && (BF51x || BF52x || BF54x)
|
|
||||||
default y
|
|
||||||
help
|
|
||||||
If you say Y here, you will get support for a character device
|
|
||||||
interface into the One Time Programmable memory pages that are
|
|
||||||
stored on the Blackfin processor. This will not get you access
|
|
||||||
to the secure memory pages however. You will need to write your
|
|
||||||
own secure code and reader for that.
|
|
||||||
|
|
||||||
To compile this driver as a module, choose M here: the module
|
|
||||||
will be called bfin-otp.
|
|
||||||
|
|
||||||
If unsure, it is safe to say Y.
|
|
||||||
|
|
||||||
config BFIN_OTP_WRITE_ENABLE
|
|
||||||
bool "Enable writing support of OTP pages"
|
|
||||||
depends on BFIN_OTP
|
|
||||||
default n
|
|
||||||
help
|
|
||||||
If you say Y here, you will enable support for writing of the
|
|
||||||
OTP pages. This is dangerous by nature as you can only program
|
|
||||||
the pages once, so only enable this option when you actually
|
|
||||||
need it so as to not inadvertently clobber data.
|
|
||||||
|
|
||||||
If unsure, say N.
|
|
||||||
|
|
||||||
config PRINTER
|
config PRINTER
|
||||||
tristate "Parallel printer support"
|
tristate "Parallel printer support"
|
||||||
depends on PARPORT
|
depends on PARPORT
|
||||||
|
|
|
||||||
|
|
@ -14,7 +14,6 @@ obj-$(CONFIG_MSPEC) += mspec.o
|
||||||
obj-$(CONFIG_UV_MMTIMER) += uv_mmtimer.o
|
obj-$(CONFIG_UV_MMTIMER) += uv_mmtimer.o
|
||||||
obj-$(CONFIG_IBM_BSR) += bsr.o
|
obj-$(CONFIG_IBM_BSR) += bsr.o
|
||||||
obj-$(CONFIG_SGI_MBCS) += mbcs.o
|
obj-$(CONFIG_SGI_MBCS) += mbcs.o
|
||||||
obj-$(CONFIG_BFIN_OTP) += bfin-otp.o
|
|
||||||
|
|
||||||
obj-$(CONFIG_PRINTER) += lp.o
|
obj-$(CONFIG_PRINTER) += lp.o
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -1,237 +0,0 @@
|
||||||
/*
|
|
||||||
* Blackfin On-Chip OTP Memory Interface
|
|
||||||
*
|
|
||||||
* Copyright 2007-2009 Analog Devices Inc.
|
|
||||||
*
|
|
||||||
* Enter bugs at http://blackfin.uclinux.org/
|
|
||||||
*
|
|
||||||
* Licensed under the GPL-2 or later.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include <linux/device.h>
|
|
||||||
#include <linux/errno.h>
|
|
||||||
#include <linux/fs.h>
|
|
||||||
#include <linux/init.h>
|
|
||||||
#include <linux/miscdevice.h>
|
|
||||||
#include <linux/module.h>
|
|
||||||
#include <linux/mutex.h>
|
|
||||||
#include <linux/types.h>
|
|
||||||
#include <mtd/mtd-abi.h>
|
|
||||||
|
|
||||||
#include <asm/blackfin.h>
|
|
||||||
#include <asm/bfrom.h>
|
|
||||||
#include <linux/uaccess.h>
|
|
||||||
|
|
||||||
#define stamp(fmt, args...) pr_debug("%s:%i: " fmt "\n", __func__, __LINE__, ## args)
|
|
||||||
#define stampit() stamp("here i am")
|
|
||||||
#define pr_init(fmt, args...) ({ static const __initconst char __fmt[] = fmt; printk(__fmt, ## args); })
|
|
||||||
|
|
||||||
#define DRIVER_NAME "bfin-otp"
|
|
||||||
#define PFX DRIVER_NAME ": "
|
|
||||||
|
|
||||||
static DEFINE_MUTEX(bfin_otp_lock);
|
|
||||||
|
|
||||||
/**
|
|
||||||
* bfin_otp_read - Read OTP pages
|
|
||||||
*
|
|
||||||
* All reads must be in half page chunks (half page == 64 bits).
|
|
||||||
*/
|
|
||||||
static ssize_t bfin_otp_read(struct file *file, char __user *buff, size_t count, loff_t *pos)
|
|
||||||
{
|
|
||||||
ssize_t bytes_done;
|
|
||||||
u32 page, flags, ret;
|
|
||||||
u64 content;
|
|
||||||
|
|
||||||
stampit();
|
|
||||||
|
|
||||||
if (count % sizeof(u64))
|
|
||||||
return -EMSGSIZE;
|
|
||||||
|
|
||||||
if (mutex_lock_interruptible(&bfin_otp_lock))
|
|
||||||
return -ERESTARTSYS;
|
|
||||||
|
|
||||||
bytes_done = 0;
|
|
||||||
page = *pos / (sizeof(u64) * 2);
|
|
||||||
while (bytes_done < count) {
|
|
||||||
flags = (*pos % (sizeof(u64) * 2) ? OTP_UPPER_HALF : OTP_LOWER_HALF);
|
|
||||||
stamp("processing page %i (0x%x:%s)", page, flags,
|
|
||||||
(flags & OTP_UPPER_HALF ? "upper" : "lower"));
|
|
||||||
ret = bfrom_OtpRead(page, flags, &content);
|
|
||||||
if (ret & OTP_MASTER_ERROR) {
|
|
||||||
stamp("error from otp: 0x%x", ret);
|
|
||||||
bytes_done = -EIO;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if (copy_to_user(buff + bytes_done, &content, sizeof(content))) {
|
|
||||||
bytes_done = -EFAULT;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if (flags & OTP_UPPER_HALF)
|
|
||||||
++page;
|
|
||||||
bytes_done += sizeof(content);
|
|
||||||
*pos += sizeof(content);
|
|
||||||
}
|
|
||||||
|
|
||||||
mutex_unlock(&bfin_otp_lock);
|
|
||||||
|
|
||||||
return bytes_done;
|
|
||||||
}
|
|
||||||
|
|
||||||
#ifdef CONFIG_BFIN_OTP_WRITE_ENABLE
|
|
||||||
static bool allow_writes;
|
|
||||||
|
|
||||||
/**
|
|
||||||
* bfin_otp_init_timing - setup OTP timing parameters
|
|
||||||
*
|
|
||||||
* Required before doing any write operation. Algorithms from HRM.
|
|
||||||
*/
|
|
||||||
static u32 bfin_otp_init_timing(void)
|
|
||||||
{
|
|
||||||
u32 tp1, tp2, tp3, timing;
|
|
||||||
|
|
||||||
tp1 = get_sclk() / 1000000;
|
|
||||||
tp2 = (2 * get_sclk() / 10000000) << 8;
|
|
||||||
tp3 = (0x1401) << 15;
|
|
||||||
timing = tp1 | tp2 | tp3;
|
|
||||||
if (bfrom_OtpCommand(OTP_INIT, timing))
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
return timing;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* bfin_otp_deinit_timing - set timings to only allow reads
|
|
||||||
*
|
|
||||||
* Should be called after all writes are done.
|
|
||||||
*/
|
|
||||||
static void bfin_otp_deinit_timing(u32 timing)
|
|
||||||
{
|
|
||||||
/* mask bits [31:15] so that any attempts to write fail */
|
|
||||||
bfrom_OtpCommand(OTP_CLOSE, 0);
|
|
||||||
bfrom_OtpCommand(OTP_INIT, timing & ~(-1 << 15));
|
|
||||||
bfrom_OtpCommand(OTP_CLOSE, 0);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* bfin_otp_write - write OTP pages
|
|
||||||
*
|
|
||||||
* All writes must be in half page chunks (half page == 64 bits).
|
|
||||||
*/
|
|
||||||
static ssize_t bfin_otp_write(struct file *filp, const char __user *buff, size_t count, loff_t *pos)
|
|
||||||
{
|
|
||||||
ssize_t bytes_done;
|
|
||||||
u32 timing, page, base_flags, flags, ret;
|
|
||||||
u64 content;
|
|
||||||
|
|
||||||
if (!allow_writes)
|
|
||||||
return -EACCES;
|
|
||||||
|
|
||||||
if (count % sizeof(u64))
|
|
||||||
return -EMSGSIZE;
|
|
||||||
|
|
||||||
if (mutex_lock_interruptible(&bfin_otp_lock))
|
|
||||||
return -ERESTARTSYS;
|
|
||||||
|
|
||||||
stampit();
|
|
||||||
|
|
||||||
timing = bfin_otp_init_timing();
|
|
||||||
if (timing == 0) {
|
|
||||||
mutex_unlock(&bfin_otp_lock);
|
|
||||||
return -EIO;
|
|
||||||
}
|
|
||||||
|
|
||||||
base_flags = OTP_CHECK_FOR_PREV_WRITE;
|
|
||||||
|
|
||||||
bytes_done = 0;
|
|
||||||
page = *pos / (sizeof(u64) * 2);
|
|
||||||
while (bytes_done < count) {
|
|
||||||
flags = base_flags | (*pos % (sizeof(u64) * 2) ? OTP_UPPER_HALF : OTP_LOWER_HALF);
|
|
||||||
stamp("processing page %i (0x%x:%s) from %p", page, flags,
|
|
||||||
(flags & OTP_UPPER_HALF ? "upper" : "lower"), buff + bytes_done);
|
|
||||||
if (copy_from_user(&content, buff + bytes_done, sizeof(content))) {
|
|
||||||
bytes_done = -EFAULT;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
ret = bfrom_OtpWrite(page, flags, &content);
|
|
||||||
if (ret & OTP_MASTER_ERROR) {
|
|
||||||
stamp("error from otp: 0x%x", ret);
|
|
||||||
bytes_done = -EIO;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
if (flags & OTP_UPPER_HALF)
|
|
||||||
++page;
|
|
||||||
bytes_done += sizeof(content);
|
|
||||||
*pos += sizeof(content);
|
|
||||||
}
|
|
||||||
|
|
||||||
bfin_otp_deinit_timing(timing);
|
|
||||||
|
|
||||||
mutex_unlock(&bfin_otp_lock);
|
|
||||||
|
|
||||||
return bytes_done;
|
|
||||||
}
|
|
||||||
|
|
||||||
static long bfin_otp_ioctl(struct file *filp, unsigned cmd, unsigned long arg)
|
|
||||||
{
|
|
||||||
stampit();
|
|
||||||
|
|
||||||
switch (cmd) {
|
|
||||||
case OTPLOCK: {
|
|
||||||
u32 timing;
|
|
||||||
int ret = -EIO;
|
|
||||||
|
|
||||||
if (!allow_writes)
|
|
||||||
return -EACCES;
|
|
||||||
|
|
||||||
if (mutex_lock_interruptible(&bfin_otp_lock))
|
|
||||||
return -ERESTARTSYS;
|
|
||||||
|
|
||||||
timing = bfin_otp_init_timing();
|
|
||||||
if (timing) {
|
|
||||||
u32 otp_result = bfrom_OtpWrite(arg, OTP_LOCK, NULL);
|
|
||||||
stamp("locking page %lu resulted in 0x%x", arg, otp_result);
|
|
||||||
if (!(otp_result & OTP_MASTER_ERROR))
|
|
||||||
ret = 0;
|
|
||||||
|
|
||||||
bfin_otp_deinit_timing(timing);
|
|
||||||
}
|
|
||||||
|
|
||||||
mutex_unlock(&bfin_otp_lock);
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
case MEMLOCK:
|
|
||||||
allow_writes = false;
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
case MEMUNLOCK:
|
|
||||||
allow_writes = true;
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
return -EINVAL;
|
|
||||||
}
|
|
||||||
#else
|
|
||||||
# define bfin_otp_write NULL
|
|
||||||
# define bfin_otp_ioctl NULL
|
|
||||||
#endif
|
|
||||||
|
|
||||||
static const struct file_operations bfin_otp_fops = {
|
|
||||||
.owner = THIS_MODULE,
|
|
||||||
.unlocked_ioctl = bfin_otp_ioctl,
|
|
||||||
.read = bfin_otp_read,
|
|
||||||
.write = bfin_otp_write,
|
|
||||||
.llseek = default_llseek,
|
|
||||||
};
|
|
||||||
|
|
||||||
static struct miscdevice bfin_otp_misc_device = {
|
|
||||||
.minor = MISC_DYNAMIC_MINOR,
|
|
||||||
.name = DRIVER_NAME,
|
|
||||||
.fops = &bfin_otp_fops,
|
|
||||||
};
|
|
||||||
module_misc_device(bfin_otp_misc_device);
|
|
||||||
|
|
||||||
MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
|
|
||||||
MODULE_DESCRIPTION("Blackfin OTP Memory Interface");
|
|
||||||
MODULE_LICENSE("GPL");
|
|
||||||
Loading…
Reference in New Issue
Block a user