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Commit a244b252 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt
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Remove unused HDPU driver 

This driver seems to be specific to a "Sky CPU" board for which we
don't appear to have upstream support (or not any more). No Kconfig
file in the kernel ever enables it. So remove it.
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 0fdf8675
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drivers/misc/Makefile
View file @ a244b252
......@@ -3,7 +3,6 @@
#
obj-$(CONFIG_IBM_ASM) += ibmasm/
obj-$(CONFIG_HDPU_FEATURES) += hdpuftrs/
obj-$(CONFIG_AD525X_DPOT) += ad525x_dpot.o
obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
......
drivers/misc/hdpuftrs/Makefile deleted 100644 → 0
View file @ 0fdf8675
obj-$(CONFIG_HDPU_FEATURES) := hdpu_cpustate.o hdpu_nexus.o
drivers/misc/hdpuftrs/hdpu_cpustate.c deleted 100644 → 0
View file @ 0fdf8675
/*
* Sky CPU State Driver
*
* Copyright (C) 2002 Brian Waite
*
* This driver allows use of the CPU state bits
* It exports the /dev/sky_cpustate and also
* /proc/sky_cpustate pseudo-file for status information.
*
* This program 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.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/miscdevice.h>
#include <linux/proc_fs.h>
#include <linux/hdpu_features.h>
#include <linux/platform_device.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
#include <asm/io.h>
#define SKY_CPUSTATE_VERSION "1.1"
static int hdpu_cpustate_probe(struct platform_device *pdev);
static int hdpu_cpustate_remove(struct platform_device *pdev);
static unsigned char cpustate_get_state(void);
static int cpustate_proc_open(struct inode *inode, struct file *file);
static int cpustate_proc_read(struct seq_file *seq, void *offset);
static struct cpustate_t cpustate;
static const struct file_operations proc_cpustate = {
.open = cpustate_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static int cpustate_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, cpustate_proc_read, NULL);
}
static int cpustate_proc_read(struct seq_file *seq, void *offset)
{
seq_printf(seq, "CPU State: %04x\n", cpustate_get_state());
return 0;
}
static int cpustate_get_ref(int excl)
{
int retval = -EBUSY;
spin_lock(&cpustate.lock);
if (cpustate.excl)
goto out_busy;
if (excl) {
if (cpustate.open_count)
goto out_busy;
cpustate.excl = 1;
}
cpustate.open_count++;
retval = 0;
out_busy:
spin_unlock(&cpustate.lock);
return retval;
}
static int cpustate_free_ref(void)
{
spin_lock(&cpustate.lock);
cpustate.excl = 0;
cpustate.open_count--;
spin_unlock(&cpustate.lock);
return 0;
}
static unsigned char cpustate_get_state(void)
{
return cpustate.cached_val;
}
static void cpustate_set_state(unsigned char new_state)
{
unsigned int state = (new_state << 21);
#ifdef DEBUG_CPUSTATE
printk("CPUSTATE -> 0x%x\n", new_state);
#endif
spin_lock(&cpustate.lock);
cpustate.cached_val = new_state;
writel((0xff << 21), cpustate.clr_addr);
writel(state, cpustate.set_addr);
spin_unlock(&cpustate.lock);
}
/*
* Now all the various file operations that we export.
*/
static ssize_t cpustate_read(struct file *file, char *buf,
size_t count, loff_t * ppos)
{
unsigned char data;
if (count < 0)
return -EFAULT;
if (count == 0)
return 0;
data = cpustate_get_state();
if (copy_to_user(buf, &data, sizeof(unsigned char)))
return -EFAULT;
return sizeof(unsigned char);
}
static ssize_t cpustate_write(struct file *file, const char *buf,
size_t count, loff_t * ppos)
{
unsigned char data;
if (count < 0)
return -EFAULT;
if (count == 0)
return 0;
if (copy_from_user((unsigned char *)&data, buf, sizeof(unsigned char)))
return -EFAULT;
cpustate_set_state(data);
return sizeof(unsigned char);
}
static int cpustate_open(struct inode *inode, struct file *file)
{
int ret;
lock_kernel();
ret = cpustate_get_ref((file->f_flags & O_EXCL));
unlock_kernel();
return ret;
}
static int cpustate_release(struct inode *inode, struct file *file)
{
return cpustate_free_ref();
}
static struct platform_driver hdpu_cpustate_driver = {
.probe = hdpu_cpustate_probe,
.remove = hdpu_cpustate_remove,
.driver = {
.name = HDPU_CPUSTATE_NAME,
.owner = THIS_MODULE,
},
};
/*
* The various file operations we support.
*/
static const struct file_operations cpustate_fops = {
.owner = THIS_MODULE,
.open = cpustate_open,
.release = cpustate_release,
.read = cpustate_read,
.write = cpustate_write,
.llseek = no_llseek,
};
static struct miscdevice cpustate_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = "sky_cpustate",
.fops = &cpustate_fops,
};
static int hdpu_cpustate_probe(struct platform_device *pdev)
{
struct resource *res;
struct proc_dir_entry *proc_de;
int ret;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
printk(KERN_ERR "sky_cpustate: "
"Invalid memory resource.\n");
return -EINVAL;
}
cpustate.set_addr = (unsigned long *)res->start;
cpustate.clr_addr = (unsigned long *)res->end - 1;
ret = misc_register(&cpustate_dev);
if (ret) {
printk(KERN_WARNING "sky_cpustate: "
"Unable to register misc device.\n");
cpustate.set_addr = NULL;
cpustate.clr_addr = NULL;
return ret;
}
proc_de = proc_create("sky_cpustate", 0666, NULL, &proc_cpustate);
if (!proc_de) {
printk(KERN_WARNING "sky_cpustate: "
"Unable to create proc entry\n");
}
printk(KERN_INFO "Sky CPU State Driver v" SKY_CPUSTATE_VERSION "\n");
return 0;
}
static int hdpu_cpustate_remove(struct platform_device *pdev)
{
cpustate.set_addr = NULL;
cpustate.clr_addr = NULL;
remove_proc_entry("sky_cpustate", NULL);
misc_deregister(&cpustate_dev);
return 0;
}
static int __init cpustate_init(void)
{
return platform_driver_register(&hdpu_cpustate_driver);
}
static void __exit cpustate_exit(void)
{
platform_driver_unregister(&hdpu_cpustate_driver);
}
module_init(cpustate_init);
module_exit(cpustate_exit);
MODULE_AUTHOR("Brian Waite");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" HDPU_CPUSTATE_NAME);
drivers/misc/hdpuftrs/hdpu_nexus.c deleted 100644 → 0
View file @ 0fdf8675
/*
* Sky Nexus Register Driver
*
* Copyright (C) 2002 Brian Waite
*
* This driver allows reading the Nexus register
* It exports the /proc/sky_chassis_id and also
* /proc/sky_slot_id pseudo-file for status information.
*
* This program 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.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/hdpu_features.h>
#include <linux/platform_device.h>
#include <linux/seq_file.h>
#include <asm/io.h>
static int hdpu_nexus_probe(struct platform_device *pdev);
static int hdpu_nexus_remove(struct platform_device *pdev);
static int hdpu_slot_id_open(struct inode *inode, struct file *file);
static int hdpu_slot_id_read(struct seq_file *seq, void *offset);
static int hdpu_chassis_id_open(struct inode *inode, struct file *file);
static int hdpu_chassis_id_read(struct seq_file *seq, void *offset);
static struct proc_dir_entry *hdpu_slot_id;
static struct proc_dir_entry *hdpu_chassis_id;
static int slot_id = -1;
static int chassis_id = -1;
static const struct file_operations proc_slot_id = {
.open = hdpu_slot_id_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static const struct file_operations proc_chassis_id = {
.open = hdpu_chassis_id_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.owner = THIS_MODULE,
};
static struct platform_driver hdpu_nexus_driver = {
.probe = hdpu_nexus_probe,
.remove = hdpu_nexus_remove,
.driver = {
.name = HDPU_NEXUS_NAME,
.owner = THIS_MODULE,
},
};
static int hdpu_slot_id_open(struct inode *inode, struct file *file)
{
return single_open(file, hdpu_slot_id_read, NULL);
}
static int hdpu_slot_id_read(struct seq_file *seq, void *offset)
{
seq_printf(seq, "%d\n", slot_id);
return 0;
}
static int hdpu_chassis_id_open(struct inode *inode, struct file *file)
{
return single_open(file, hdpu_chassis_id_read, NULL);
}
static int hdpu_chassis_id_read(struct seq_file *seq, void *offset)
{
seq_printf(seq, "%d\n", chassis_id);
return 0;
}
static int hdpu_nexus_probe(struct platform_device *pdev)
{
struct resource *res;
int *nexus_id_addr;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
printk(KERN_ERR "sky_nexus: "
"Invalid memory resource.\n");
return -EINVAL;
}
nexus_id_addr = ioremap(res->start,
(unsigned long)(res->end - res->start));
if (nexus_id_addr) {
slot_id = (*nexus_id_addr >> 8) & 0x1f;
chassis_id = *nexus_id_addr & 0xff;
iounmap(nexus_id_addr);
} else {
printk(KERN_ERR "sky_nexus: Could not map slot id\n");
}
hdpu_slot_id = proc_create("sky_slot_id", 0666, NULL, &proc_slot_id);
if (!hdpu_slot_id) {
printk(KERN_WARNING "sky_nexus: "
"Unable to create proc dir entry: sky_slot_id\n");
}
hdpu_chassis_id = proc_create("sky_chassis_id", 0666, NULL,
&proc_chassis_id);
if (!hdpu_chassis_id)
printk(KERN_WARNING "sky_nexus: "
"Unable to create proc dir entry: sky_chassis_id\n");
return 0;
}
static int hdpu_nexus_remove(struct platform_device *pdev)
{
slot_id = -1;
chassis_id = -1;
remove_proc_entry("sky_slot_id", NULL);
remove_proc_entry("sky_chassis_id", NULL);
hdpu_slot_id = 0;
hdpu_chassis_id = 0;
return 0;
}
static int __init nexus_init(void)
{
return platform_driver_register(&hdpu_nexus_driver);
}
static void __exit nexus_exit(void)
{
platform_driver_unregister(&hdpu_nexus_driver);
}
module_init(nexus_init);
module_exit(nexus_exit);
MODULE_AUTHOR("Brian Waite");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" HDPU_NEXUS_NAME);
include/linux/hdpu_features.h deleted 100644 → 0
View file @ 0fdf8675
#include <linux/spinlock.h>
struct cpustate_t {
spinlock_t lock;
int excl;
int open_count;
unsigned char cached_val;
int inited;
unsigned long *set_addr;
unsigned long *clr_addr;
};
#define HDPU_CPUSTATE_NAME "hdpu cpustate"
#define HDPU_NEXUS_NAME "hdpu nexus"
#define CPUSTATE_KERNEL_MAJOR 0x10
#define CPUSTATE_KERNEL_INIT_DRV 0 /* CPU State Driver Initialized */
#define CPUSTATE_KERNEL_INIT_PCI 1 /* 64360 PCI Busses Init */
#define CPUSTATE_KERNEL_INIT_REG 2 /* 64360 Bridge Init */
#define CPUSTATE_KERNEL_CPU1_KICK 3 /* Boot cpu 1 */
#define CPUSTATE_KERNEL_CPU1_OK 4 /* Cpu 1 has checked in */
#define CPUSTATE_KERNEL_OK 5 /* Terminal state */
#define CPUSTATE_KERNEL_RESET 14 /* Board reset via SW*/
#define CPUSTATE_KERNEL_HALT 15 /* Board halted via SW*/
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