+++ /dev/null
-/*
- * 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);
+++ /dev/null
-/*
- * 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);
projects / platform / kernel / linux-rpi.git / commitdiff