diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/scom.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/sysdev/scom.c | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/scom.c b/ANDROID_3.4.5/arch/powerpc/sysdev/scom.c deleted file mode 100644 index 702256a1..00000000 --- a/ANDROID_3.4.5/arch/powerpc/sysdev/scom.c +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Copyright 2010 Benjamin Herrenschmidt, IBM Corp - * <benh@kernel.crashing.org> - * and David Gibson, IBM Corporation. - * - * 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. - * - * 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/kernel.h> -#include <linux/debugfs.h> -#include <linux/slab.h> -#include <linux/export.h> -#include <asm/debug.h> -#include <asm/prom.h> -#include <asm/scom.h> - -const struct scom_controller *scom_controller; -EXPORT_SYMBOL_GPL(scom_controller); - -struct device_node *scom_find_parent(struct device_node *node) -{ - struct device_node *par, *tmp; - const u32 *p; - - for (par = of_node_get(node); par;) { - if (of_get_property(par, "scom-controller", NULL)) - break; - p = of_get_property(par, "scom-parent", NULL); - tmp = par; - if (p == NULL) - par = of_get_parent(par); - else - par = of_find_node_by_phandle(*p); - of_node_put(tmp); - } - return par; -} -EXPORT_SYMBOL_GPL(scom_find_parent); - -scom_map_t scom_map_device(struct device_node *dev, int index) -{ - struct device_node *parent; - unsigned int cells, size; - const u32 *prop; - u64 reg, cnt; - scom_map_t ret; - - parent = scom_find_parent(dev); - - if (parent == NULL) - return 0; - - prop = of_get_property(parent, "#scom-cells", NULL); - cells = prop ? *prop : 1; - - prop = of_get_property(dev, "scom-reg", &size); - if (!prop) - return 0; - size >>= 2; - - if (index >= (size / (2*cells))) - return 0; - - reg = of_read_number(&prop[index * cells * 2], cells); - cnt = of_read_number(&prop[index * cells * 2 + cells], cells); - - ret = scom_map(parent, reg, cnt); - of_node_put(parent); - - return ret; -} -EXPORT_SYMBOL_GPL(scom_map_device); - -#ifdef CONFIG_SCOM_DEBUGFS -struct scom_debug_entry { - struct device_node *dn; - unsigned long addr; - scom_map_t map; - spinlock_t lock; - char name[8]; - struct debugfs_blob_wrapper blob; -}; - -static int scom_addr_set(void *data, u64 val) -{ - struct scom_debug_entry *ent = data; - - ent->addr = 0; - scom_unmap(ent->map); - - ent->map = scom_map(ent->dn, val, 1); - if (scom_map_ok(ent->map)) - ent->addr = val; - else - return -EFAULT; - - return 0; -} - -static int scom_addr_get(void *data, u64 *val) -{ - struct scom_debug_entry *ent = data; - *val = ent->addr; - return 0; -} -DEFINE_SIMPLE_ATTRIBUTE(scom_addr_fops, scom_addr_get, scom_addr_set, - "0x%llx\n"); - -static int scom_val_set(void *data, u64 val) -{ - struct scom_debug_entry *ent = data; - - if (!scom_map_ok(ent->map)) - return -EFAULT; - - scom_write(ent->map, 0, val); - - return 0; -} - -static int scom_val_get(void *data, u64 *val) -{ - struct scom_debug_entry *ent = data; - - if (!scom_map_ok(ent->map)) - return -EFAULT; - - *val = scom_read(ent->map, 0); - return 0; -} -DEFINE_SIMPLE_ATTRIBUTE(scom_val_fops, scom_val_get, scom_val_set, - "0x%llx\n"); - -static int scom_debug_init_one(struct dentry *root, struct device_node *dn, - int i) -{ - struct scom_debug_entry *ent; - struct dentry *dir; - - ent = kzalloc(sizeof(*ent), GFP_KERNEL); - if (!ent) - return -ENOMEM; - - ent->dn = of_node_get(dn); - ent->map = SCOM_MAP_INVALID; - spin_lock_init(&ent->lock); - snprintf(ent->name, 8, "scom%d", i); - ent->blob.data = dn->full_name; - ent->blob.size = strlen(dn->full_name); - - dir = debugfs_create_dir(ent->name, root); - if (!dir) { - of_node_put(dn); - kfree(ent); - return -1; - } - - debugfs_create_file("addr", 0600, dir, ent, &scom_addr_fops); - debugfs_create_file("value", 0600, dir, ent, &scom_val_fops); - debugfs_create_blob("path", 0400, dir, &ent->blob); - - return 0; -} - -static int scom_debug_init(void) -{ - struct device_node *dn; - struct dentry *root; - int i, rc; - - root = debugfs_create_dir("scom", powerpc_debugfs_root); - if (!root) - return -1; - - i = rc = 0; - for_each_node_with_property(dn, "scom-controller") - rc |= scom_debug_init_one(root, dn, i++); - - return rc; -} -device_initcall(scom_debug_init); -#endif /* CONFIG_SCOM_DEBUGFS */ |