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-rw-r--r--target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c212
-rw-r--r--target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c20
-rw-r--r--target/linux/adm5120/files/drivers/usb/host/adm5120.h7
3 files changed, 211 insertions, 28 deletions
diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c
index 3eec94a38..a6eb67cb6 100644
--- a/target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c
+++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-dbg.c
@@ -390,6 +390,42 @@ static inline void remove_debug_files(struct admhcd *bus) { }
#else
+static int debug_async_open(struct inode *, struct file *);
+static int debug_periodic_open(struct inode *, struct file *);
+static int debug_registers_open(struct inode *, struct file *);
+static int debug_async_open(struct inode *, struct file *);
+static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
+static int debug_close(struct inode *, struct file *);
+
+static const struct file_operations debug_async_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_async_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_periodic_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_periodic_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+static const struct file_operations debug_registers_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_registers_open,
+ .read = debug_output,
+ .release = debug_close,
+};
+
+static struct dentry *admhc_debug_root;
+
+struct debug_buffer {
+ ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
+ struct device *dev;
+ struct mutex mutex; /* protect filling of buffer */
+ size_t count; /* number of characters filled into buffer */
+ char *page;
+};
+
static ssize_t
show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
{
@@ -455,8 +491,7 @@ show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
return count - size;
}
-static ssize_t
-show_async(struct class_device *class_dev, char *buf)
+static ssize_t fill_async_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -464,24 +499,22 @@ show_async(struct class_device *class_dev, char *buf)
size_t temp;
unsigned long flags;
- bus = class_get_devdata(class_dev);
+ bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
/* display control and bulk lists together, for simplicity */
spin_lock_irqsave(&ahcd->lock, flags);
- temp = show_list(ahcd, buf, PAGE_SIZE, ahcd->ed_head);
+ temp = show_list(ahcd, buf->page, buf->count, ahcd->ed_head);
spin_unlock_irqrestore(&ahcd->lock, flags);
return temp;
}
-static CLASS_DEVICE_ATTR(async, S_IRUGO, show_async, NULL);
#define DBG_SCHED_LIMIT 64
-static ssize_t
-show_periodic(struct class_device *class_dev, char *buf)
+static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -496,10 +529,10 @@ show_periodic(struct class_device *class_dev, char *buf)
return 0;
seen_count = 0;
- bus = class_get_devdata(class_dev);
+ bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
- next = buf;
+ next = buf->page;
size = PAGE_SIZE;
temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
@@ -574,13 +607,11 @@ show_periodic(struct class_device *class_dev, char *buf)
return PAGE_SIZE - size;
}
-static CLASS_DEVICE_ATTR(periodic, S_IRUGO, show_periodic, NULL);
#undef DBG_SCHED_LIMIT
-static ssize_t
-show_registers(struct class_device *class_dev, char *buf)
+static ssize_t fill_registers_buffer(struct debug_buffer *buf)
{
struct usb_bus *bus;
struct usb_hcd *hcd;
@@ -591,11 +622,11 @@ show_registers(struct class_device *class_dev, char *buf)
char *next;
u32 rdata;
- bus = class_get_devdata(class_dev);
+ bus = dev_get_drvdata(buf->dev);
hcd = bus_to_hcd(bus);
ahcd = hcd_to_admhcd(hcd);
regs = ahcd->regs;
- next = buf;
+ next = buf->page;
size = PAGE_SIZE;
spin_lock_irqsave(&ahcd->lock, flags);
@@ -656,27 +687,154 @@ done:
spin_unlock_irqrestore(&ahcd->lock, flags);
return PAGE_SIZE - size;
}
-static CLASS_DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
-static inline void create_debug_files (struct admhcd *ahcd)
+static struct debug_buffer *alloc_buffer(struct device *dev,
+ ssize_t (*fill_func)(struct debug_buffer *))
{
- struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
- int retval;
+ struct debug_buffer *buf;
- retval = class_device_create_file(cldev, &class_device_attr_async);
- retval = class_device_create_file(cldev, &class_device_attr_periodic);
- retval = class_device_create_file(cldev, &class_device_attr_registers);
- admhc_dbg(ahcd, "created debug files\n");
+ buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
+
+ if (buf) {
+ buf->dev = dev;
+ buf->fill_func = fill_func;
+ mutex_init(&buf->mutex);
+ }
+
+ return buf;
+}
+
+static int fill_buffer(struct debug_buffer *buf)
+{
+ int ret = 0;
+
+ if (!buf->page)
+ buf->page = (char *)get_zeroed_page(GFP_KERNEL);
+
+ if (!buf->page) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = buf->fill_func(buf);
+
+ if (ret >= 0) {
+ buf->count = ret;
+ ret = 0;
+ }
+
+out:
+ return ret;
}
-static inline void remove_debug_files (struct admhcd *ahcd)
+static ssize_t debug_output(struct file *file, char __user *user_buf,
+ size_t len, loff_t *offset)
{
- struct class_device *cldev = admhcd_to_hcd(ahcd)->self.class_dev;
+ struct debug_buffer *buf = file->private_data;
+ int ret = 0;
+
+ mutex_lock(&buf->mutex);
+ if (buf->count == 0) {
+ ret = fill_buffer(buf);
+ if (ret != 0) {
+ mutex_unlock(&buf->mutex);
+ goto out;
+ }
+ }
+ mutex_unlock(&buf->mutex);
+
+ ret = simple_read_from_buffer(user_buf, len, offset,
+ buf->page, buf->count);
- class_device_remove_file(cldev, &class_device_attr_async);
- class_device_remove_file(cldev, &class_device_attr_periodic);
- class_device_remove_file(cldev, &class_device_attr_registers);
+out:
+ return ret;
+}
+
+static int debug_close(struct inode *inode, struct file *file)
+{
+ struct debug_buffer *buf = file->private_data;
+
+ if (buf) {
+ if (buf->page)
+ free_page((unsigned long)buf->page);
+ kfree(buf);
+ }
+
+ return 0;
+}
+
+static int debug_async_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static int debug_periodic_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private,
+ fill_periodic_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static int debug_registers_open(struct inode *inode, struct file *file)
+{
+ file->private_data = alloc_buffer(inode->i_private,
+ fill_registers_buffer);
+
+ return file->private_data ? 0 : -ENOMEM;
+}
+
+static inline void create_debug_files(struct admhcd *ahcd)
+{
+ struct usb_bus *bus = &admhcd_to_hcd(ahcd)->self;
+ struct device *dev = bus->dev;
+
+ ahcd->debug_dir = debugfs_create_dir(bus->bus_name, admhc_debug_root);
+ if (!ahcd->debug_dir)
+ goto dir_error;
+
+ ahcd->debug_async = debugfs_create_file("async", S_IRUGO,
+ ahcd->debug_dir, dev,
+ &debug_async_fops);
+ if (!ahcd->debug_async)
+ goto async_error;
+
+ ahcd->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
+ ahcd->debug_dir, dev,
+ &debug_periodic_fops);
+ if (!ahcd->debug_periodic)
+ goto periodic_error;
+
+ ahcd->debug_registers = debugfs_create_file("registers", S_IRUGO,
+ ahcd->debug_dir, dev,
+ &debug_registers_fops);
+ if (!ahcd->debug_registers)
+ goto registers_error;
+
+ admhc_dbg(ahcd, "created debug files\n");
+ return;
+
+registers_error:
+ debugfs_remove(ahcd->debug_periodic);
+periodic_error:
+ debugfs_remove(ahcd->debug_async);
+async_error:
+ debugfs_remove(ahcd->debug_dir);
+dir_error:
+ ahcd->debug_periodic = NULL;
+ ahcd->debug_async = NULL;
+ ahcd->debug_dir = NULL;
+}
+
+static inline void remove_debug_files(struct admhcd *ahcd)
+{
+ debugfs_remove(ahcd->debug_registers);
+ debugfs_remove(ahcd->debug_periodic);
+ debugfs_remove(ahcd->debug_async);
+ debugfs_remove(ahcd->debug_dir);
}
#endif
diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c b/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c
index 78b1aef13..72a252530 100644
--- a/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c
+++ b/target/linux/adm5120/files/drivers/usb/host/adm5120-hcd.c
@@ -35,6 +35,7 @@
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/reboot.h>
+#include <linux/debugfs.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -45,7 +46,7 @@
#include "../core/hcd.h"
#include "../core/hub.h"
-#define DRIVER_VERSION "0.24.0"
+#define DRIVER_VERSION "0.25.0"
#define DRIVER_AUTHOR "Gabor Juhos <juhosg at openwrt.org>"
#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver"
@@ -799,6 +800,14 @@ static int __init admhc_hcd_mod_init(void)
pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name,
sizeof (struct ed), sizeof (struct td));
+#ifdef DEBUG
+ admhc_debug_root = debugfs_create_dir("admhc", NULL);
+ if (!admhc_debug_root) {
+ ret = -ENOENT;
+ goto error_debug;
+ }
+#endif
+
#ifdef PLATFORM_DRIVER
ret = platform_driver_register(&PLATFORM_DRIVER);
if (ret < 0)
@@ -811,6 +820,12 @@ static int __init admhc_hcd_mod_init(void)
platform_driver_unregister(&PLATFORM_DRIVER);
error_platform:
#endif
+
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+ admhc_debug_root = NULL;
+error_debug:
+#endif
return ret;
}
module_init(admhc_hcd_mod_init);
@@ -818,6 +833,9 @@ module_init(admhc_hcd_mod_init);
static void __exit admhc_hcd_mod_exit(void)
{
platform_driver_unregister(&PLATFORM_DRIVER);
+#ifdef DEBUG
+ debugfs_remove(admhc_debug_root);
+#endif
}
module_exit(admhc_hcd_mod_exit);
diff --git a/target/linux/adm5120/files/drivers/usb/host/adm5120.h b/target/linux/adm5120/files/drivers/usb/host/adm5120.h
index a3acfe53b..fbb9b3a12 100644
--- a/target/linux/adm5120/files/drivers/usb/host/adm5120.h
+++ b/target/linux/adm5120/files/drivers/usb/host/adm5120.h
@@ -431,6 +431,13 @@ struct admhcd {
#define OHCI_QUIRK_BE_MMIO 0x10 /* BE registers */
#define OHCI_QUIRK_ZFMICRO 0x20 /* Compaq ZFMicro chipset*/
// there are also chip quirks/bugs in init logic
+
+#ifdef DEBUG
+ struct dentry *debug_dir;
+ struct dentry *debug_async;
+ struct dentry *debug_periodic;
+ struct dentry *debug_registers;
+#endif
};
/* convert between an hcd pointer and the corresponding ahcd_hcd */