#include <linux/kernel.h>#include <linux/device.h>#include <linux/types.h>#include <linux/spinlock.h>#include <linux/debugfs.h>#include <linux/seq_file.h>#include <linux/uaccess.h>#include <linux/usb/ch9.h>#include <linux/usb/gadget.h> #include "ci.h"#include "udc.h"#include "bits.h"#include "debug.h" /** * ci_device_show: prints information about device capabilities and status */static int ci_device_show(struct seq_file *s, void *data){	struct ci_hdrc *ci = s->private;	struct usb_gadget *gadget = &ci->gadget; 	seq_printf(s, "speed             = %d\n", gadget->speed);	seq_printf(s, "max_speed         = %d\n", gadget->max_speed);	seq_printf(s, "is_otg            = %d\n", gadget->is_otg);	seq_printf(s, "is_a_peripheral   = %d\n", gadget->is_a_peripheral);	seq_printf(s, "b_hnp_enable      = %d\n", gadget->b_hnp_enable);	seq_printf(s, "a_hnp_support     = %d\n", gadget->a_hnp_support);	seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support);	seq_printf(s, "name              = %s\n",		   (gadget->name ? gadget->name : "")); 	if (!ci->driver)		return 0; 	seq_printf(s, "gadget function   = %s\n",		       (ci->driver->function ? ci->driver->function : ""));	seq_printf(s, "gadget max speed  = %d\n", ci->driver->max_speed); 	return 0;} static int ci_device_open(struct inode *inode, struct file *file){	return single_open(file, ci_device_show, inode->i_private);} static const struct file_operations ci_device_fops = {	.open		= ci_device_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; /** * ci_port_test_show: reads port test mode */static int ci_port_test_show(struct seq_file *s, void *data){	struct ci_hdrc *ci = s->private;	unsigned long flags;	unsigned mode; 	spin_lock_irqsave(&ci->lock, flags);	mode = hw_port_test_get(ci);	spin_unlock_irqrestore(&ci->lock, flags); 	seq_printf(s, "mode = %u\n", mode); 	return 0;} /** * ci_port_test_write: writes port test mode */static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf,				  size_t count, loff_t *ppos){	struct seq_file *s = file->private_data;	struct ci_hdrc *ci = s->private;	unsigned long flags;	unsigned mode;	char buf[32];	int ret; 	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))		return -EFAULT; 	if (sscanf(buf, "%u", &mode) != 1)		return -EINVAL; 	spin_lock_irqsave(&ci->lock, flags);	ret = hw_port_test_set(ci, mode);	spin_unlock_irqrestore(&ci->lock, flags); 	return ret ? ret : count;} static int ci_port_test_open(struct inode *inode, struct file *file){	return single_open(file, ci_port_test_show, inode->i_private);} static const struct file_operations ci_port_test_fops = {	.open		= ci_port_test_open,	.write		= ci_port_test_write,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; /** * ci_qheads_show: DMA contents of all queue heads */static int ci_qheads_show(struct seq_file *s, void *data){	struct ci_hdrc *ci = s->private;	unsigned long flags;	unsigned i, j; 	if (ci->role != CI_ROLE_GADGET) {		seq_printf(s, "not in gadget mode\n");		return 0;	} 	spin_lock_irqsave(&ci->lock, flags);	for (i = 0; i < ci->hw_ep_max/2; i++) {		struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];		struct ci_hw_ep *hweptx =			&ci->ci_hw_ep[i + ci->hw_ep_max/2];		seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",			   i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);		for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)			seq_printf(s, " %04X:    %08X    %08X\n", j,				   *((u32 *)hweprx->qh.ptr + j),				   *((u32 *)hweptx->qh.ptr + j));	}	spin_unlock_irqrestore(&ci->lock, flags); 	return 0;} static int ci_qheads_open(struct inode *inode, struct file *file){	return single_open(file, ci_qheads_show, inode->i_private);} static const struct file_operations ci_qheads_fops = {	.open		= ci_qheads_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; /** * ci_requests_show: DMA contents of all requests currently queued (all endpts) */static int ci_requests_show(struct seq_file *s, void *data){	struct ci_hdrc *ci = s->private;	unsigned long flags;	struct list_head   *ptr = NULL;	struct ci_hw_req *req = NULL;	struct td_node *node, *tmpnode;	unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32); 	if (ci->role != CI_ROLE_GADGET) {		seq_printf(s, "not in gadget mode\n");		return 0;	} 	spin_lock_irqsave(&ci->lock, flags);	for (i = 0; i < ci->hw_ep_max; i++)		list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) {			req = list_entry(ptr, struct ci_hw_req, queue); 			list_for_each_entry_safe(node, tmpnode, &req->tds, td) {				seq_printf(s, "EP=%02i: TD=%08X %s\n",					   i % (ci->hw_ep_max / 2),					   (u32)node->dma,					   ((i < ci->hw_ep_max/2) ?					   "RX" : "TX")); 				for (j = 0; j < qsize; j++)					seq_printf(s, " %04X:    %08X\n", j,						   *((u32 *)node->ptr + j));			}		}	spin_unlock_irqrestore(&ci->lock, flags); 	return 0;} static int ci_requests_open(struct inode *inode, struct file *file){	return single_open(file, ci_requests_show, inode->i_private);} static const struct file_operations ci_requests_fops = {	.open		= ci_requests_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; static int ci_role_show(struct seq_file *s, void *data){	struct ci_hdrc *ci = s->private; 	seq_printf(s, "%s\n", ci_role(ci)->name); 	return 0;} static ssize_t ci_role_write(struct file *file, const char __user *ubuf,			     size_t count, loff_t *ppos){	struct seq_file *s = file->private_data;	struct ci_hdrc *ci = s->private;	enum ci_role role;	char buf[8];	int ret; 	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))		return -EFAULT; 	for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)		if (ci->roles[role] &&		    !strncmp(buf, ci->roles[role]->name,			     strlen(ci->roles[role]->name)))			break; 	if (role == CI_ROLE_END || role == ci->role)		return -EINVAL; 	ci_role_stop(ci);	ret = ci_role_start(ci, role); 	return ret ? ret : count;} static int ci_role_open(struct inode *inode, struct file *file){	return single_open(file, ci_role_show, inode->i_private);} static const struct file_operations ci_role_fops = {	.open		= ci_role_open,	.write		= ci_role_write,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= single_release,}; /** * dbg_create_files: initializes the attribute interface * @ci: device * * This function returns an error code */int dbg_create_files(struct ci_hdrc *ci){	struct dentry *dent; 	ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);	if (!ci->debugfs)		return -ENOMEM; 	dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,				   &ci_device_fops);	if (!dent)		goto err; 	dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs,				   ci, &ci_port_test_fops);	if (!dent)		goto err; 	dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,				   &ci_qheads_fops);	if (!dent)		goto err; 	dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,				   &ci_requests_fops);	if (!dent)		goto err; 	dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,				   &ci_role_fops);	if (dent)		return 0;err:	debugfs_remove_recursive(ci->debugfs);	return -ENOMEM;} /** * dbg_remove_files: destroys the attribute interface * @ci: device */void dbg_remove_files(struct ci_hdrc *ci){	debugfs_remove_recursive(ci->debugfs);}