[linux-2.6-block.git] / drivers / usb / chipidea / debug.c

// SPDX-License-Identifier: GPL-2.0
#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 <linux/usb/phy.h>
#include <linux/usb/otg.h>
#include <linux/usb/otg-fsm.h>
#include <linux/usb/chipidea.h>

#include "ci.h"
#include "udc.h"
#include "bits.h"
#include "otg.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;
}
DEFINE_SHOW_ATTRIBUTE(ci_device);

/**
 * 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;

	pm_runtime_get_sync(ci->dev);
	spin_lock_irqsave(&ci->lock, flags);
	mode = hw_port_test_get(ci);
	spin_unlock_irqrestore(&ci->lock, flags);
	pm_runtime_put_sync(ci->dev);

	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;

	count = min_t(size_t, sizeof(buf) - 1, count);
	if (copy_from_user(buf, ubuf, count))
		return -EFAULT;

	/* sscanf requires a zero terminated string */
	buf[count] = '\0';

	if (sscanf(buf, "%u", &mode) != 1)
		return -EINVAL;

	if (mode > 255)
		return -EBADRQC;

	pm_runtime_get_sync(ci->dev);
	spin_lock_irqsave(&ci->lock, flags);
	ret = hw_port_test_set(ci, mode);
	spin_unlock_irqrestore(&ci->lock, flags);
	pm_runtime_put_sync(ci->dev);

	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;
}
DEFINE_SHOW_ATTRIBUTE(ci_qheads);

/**
 * 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 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_entry(req, &ci->ci_hw_ep[i].qh.queue, 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;
}
DEFINE_SHOW_ATTRIBUTE(ci_requests);

static int ci_otg_show(struct seq_file *s, void *unused)
{
	struct ci_hdrc *ci = s->private;
	struct otg_fsm *fsm;

	if (!ci || !ci_otg_is_fsm_mode(ci))
		return 0;

	fsm = &ci->fsm;

	/* ------ State ----- */
	seq_printf(s, "OTG state: %s\n\n",
			usb_otg_state_string(ci->otg.state));

	/* ------ State Machine Variables ----- */
	seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);

	seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);

	seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);

	seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);

	seq_printf(s, "b_conn: %d\n", fsm->b_conn);

	seq_printf(s, "adp_change: %d\n", fsm->adp_change);

	seq_printf(s, "power_up: %d\n", fsm->power_up);

	seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);

	seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);

	seq_printf(s, "a_conn: %d\n", fsm->a_conn);

	seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);

	seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);

	seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);

	seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);

	seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);

	seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);

	seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);

	seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);

	seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);

	seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);

	seq_printf(s, "id: %d\n", fsm->id);

	seq_printf(s, "protocol: %d\n", fsm->protocol);

	return 0;
}
DEFINE_SHOW_ATTRIBUTE(ci_otg);

static int ci_role_show(struct seq_file *s, void *data)
{
	struct ci_hdrc *ci = s->private;

	if (ci->role != CI_ROLE_END)
		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;

	pm_runtime_get_sync(ci->dev);
	disable_irq(ci->irq);
	ci_role_stop(ci);
	ret = ci_role_start(ci, role);
	enable_irq(ci->irq);
	pm_runtime_put_sync(ci->dev);

	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,
};

static int ci_registers_show(struct seq_file *s, void *unused)
{
	struct ci_hdrc *ci = s->private;
	u32 tmp_reg;

	if (!ci || ci->in_lpm)
		return -EPERM;

	/* ------ Registers ----- */
	tmp_reg = hw_read_intr_enable(ci);
	seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);

	tmp_reg = hw_read_intr_status(ci);
	seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_USBMODE, ~0);
	seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_USBCMD, ~0);
	seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);

	tmp_reg = hw_read(ci, OP_PORTSC, ~0);
	seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);

	if (ci->is_otg) {
		tmp_reg = hw_read_otgsc(ci, ~0);
		seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
	}

	return 0;
}
DEFINE_SHOW_ATTRIBUTE(ci_registers);

/**
 * dbg_create_files: initializes the attribute interface
 * @ci: device
 *
 * This function returns an error code
 */
void dbg_create_files(struct ci_hdrc *ci)
{
	ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);

	debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
			    &ci_device_fops);
	debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, ci,
			    &ci_port_test_fops);
	debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
			    &ci_qheads_fops);
	debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
			    &ci_requests_fops);

	if (ci_otg_is_fsm_mode(ci)) {
		debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
				    &ci_otg_fops);
	}

	debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci,
			    &ci_role_fops);
	debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
			    &ci_registers_fops);
}

/**
 * dbg_remove_files: destroys the attribute interface
 * @ci: device
 */
void dbg_remove_files(struct ci_hdrc *ci)
{
	debugfs_remove_recursive(ci->debugfs);
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
e443b333	2	#include <linux/kernel.h>
3c37bb68 AS	3	#include <linux/device.h>
	4	#include <linux/types.h>
	5	#include <linux/spinlock.h>
2d651289 AS	6	#include <linux/debugfs.h>
	7	#include <linux/seq_file.h>
	8	#include <linux/uaccess.h>
e443b333 AS	9	#include <linux/usb/ch9.h>
e443b333 AS	10	#include <linux/usb/gadget.h>
88bdffc8 LJ	11	#include <linux/usb/phy.h>
	12	#include <linux/usb/otg.h>
	13	#include <linux/usb/otg-fsm.h>
b0930d4c	14	#include <linux/usb/chipidea.h>
e443b333 AS	15
	16	#include "ci.h"
	17	#include "udc.h"
	18	#include "bits.h"
c4a8b639	19	#include "otg.h"
e443b333	20
e443b333	21	/**
2d651289	22	* ci_device_show: prints information about device capabilities and status
e443b333	23	*/
2d651289	24	static int ci_device_show(struct seq_file s, void data)
e443b333	25	{
8e22978c	26	struct ci_hdrc *ci = s->private;
2d651289	27	struct usb_gadget *gadget = &ci->gadget;
e443b333	28
2d651289 AS	29	seq_printf(s, "speed = %d\n", gadget->speed);
	30	seq_printf(s, "max_speed = %d\n", gadget->max_speed);
	31	seq_printf(s, "is_otg = %d\n", gadget->is_otg);
	32	seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral);
	33	seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable);
	34	seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support);
	35	seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support);
	36	seq_printf(s, "name = %s\n",
	37	(gadget->name ? gadget->name : ""));
	38
	39	if (!ci->driver)
	40	return 0;
e443b333	41
2d651289 AS	42	seq_printf(s, "gadget function = %s\n",
	43	(ci->driver->function ? ci->driver->function : ""));
	44	seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed);
e443b333	45
e443b333 AS	46	return 0;
e443b333 AS	47	}
e8c56f27	48	DEFINE_SHOW_ATTRIBUTE(ci_device);
e443b333	49
e443b333	50	/**
2d651289	51	* ci_port_test_show: reads port test mode
e443b333	52	*/
2d651289	53	static int ci_port_test_show(struct seq_file s, void data)
e443b333	54	{
8e22978c	55	struct ci_hdrc *ci = s->private;
e443b333 AS	56	unsigned long flags;
	57	unsigned mode;
	58
bc249379	59	pm_runtime_get_sync(ci->dev);
26c696c6 RZ	60	spin_lock_irqsave(&ci->lock, flags);
	61	mode = hw_port_test_get(ci);
	62	spin_unlock_irqrestore(&ci->lock, flags);
bc249379	63	pm_runtime_put_sync(ci->dev);
e443b333	64
2d651289 AS	65	seq_printf(s, "mode = %u\n", mode);
	66
	67	return 0;
e443b333 AS	68	}
	69
	70	/**
2d651289	71	* ci_port_test_write: writes port test mode
e443b333	72	*/
2d651289 AS	73	static ssize_t ci_port_test_write(struct file file, const char __user ubuf,
2d651289 AS	74	size_t count, loff_t *ppos)
e443b333	75	{
2d651289	76	struct seq_file *s = file->private_data;
8e22978c	77	struct ci_hdrc *ci = s->private;
e443b333 AS	78	unsigned long flags;
e443b333 AS	79	unsigned mode;
2d651289 AS	80	char buf[32];
2d651289 AS	81	int ret;
e443b333	82
bd5fb0ae HS	83	count = min_t(size_t, sizeof(buf) - 1, count);
bd5fb0ae HS	84	if (copy_from_user(buf, ubuf, count))
2d651289	85	return -EFAULT;
e443b333	86
bd5fb0ae HS	87	/* sscanf requires a zero terminated string */
	88	buf[count] = '\0';
	89
2d651289 AS	90	if (sscanf(buf, "%u", &mode) != 1)
2d651289 AS	91	return -EINVAL;
e443b333	92
3c724888 A	93	if (mode > 255)
	94	return -EBADRQC;
	95
bc249379	96	pm_runtime_get_sync(ci->dev);
26c696c6	97	spin_lock_irqsave(&ci->lock, flags);
2d651289	98	ret = hw_port_test_set(ci, mode);
26c696c6	99	spin_unlock_irqrestore(&ci->lock, flags);
bc249379	100	pm_runtime_put_sync(ci->dev);
e443b333	101
2d651289	102	return ret ? ret : count;
e443b333	103	}
2d651289 AS	104
	105	static int ci_port_test_open(struct inode inode, struct file file)
	106	{
	107	return single_open(file, ci_port_test_show, inode->i_private);
	108	}
	109
	110	static const struct file_operations ci_port_test_fops = {
	111	.open = ci_port_test_open,
	112	.write = ci_port_test_write,
	113	.read = seq_read,
	114	.llseek = seq_lseek,
	115	.release = single_release,
	116	};
e443b333 AS	117
e443b333 AS	118	/**
2d651289	119	* ci_qheads_show: DMA contents of all queue heads
e443b333	120	*/
2d651289	121	static int ci_qheads_show(struct seq_file s, void data)
e443b333	122	{
8e22978c	123	struct ci_hdrc *ci = s->private;
e443b333	124	unsigned long flags;
2d651289	125	unsigned i, j;
e443b333	126
2d651289 AS	127	if (ci->role != CI_ROLE_GADGET) {
2d651289 AS	128	seq_printf(s, "not in gadget mode\n");
e443b333 AS	129	return 0;
	130	}
	131
26c696c6 RZ	132	spin_lock_irqsave(&ci->lock, flags);
26c696c6 RZ	133	for (i = 0; i < ci->hw_ep_max/2; i++) {
8e22978c AS	134	struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i];
	135	struct ci_hw_ep *hweptx =
	136	&ci->ci_hw_ep[i + ci->hw_ep_max/2];
2d651289	137	seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n",
2dbc5c4c	138	i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma);
8e22978c	139	for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++)
2d651289	140	seq_printf(s, " %04X: %08X %08X\n", j,
2dbc5c4c AS	141	((u32 )hweprx->qh.ptr + j),
2dbc5c4c AS	142	((u32 )hweptx->qh.ptr + j));
e443b333	143	}
26c696c6	144	spin_unlock_irqrestore(&ci->lock, flags);
e443b333	145
2d651289	146	return 0;
e443b333	147	}
e8c56f27	148	DEFINE_SHOW_ATTRIBUTE(ci_qheads);
e443b333 AS	149
e443b333 AS	150	/**
2d651289	151	* ci_requests_show: DMA contents of all requests currently queued (all endpts)
e443b333	152	*/
2d651289	153	static int ci_requests_show(struct seq_file s, void data)
e443b333	154	{
8e22978c	155	struct ci_hdrc *ci = s->private;
e443b333	156	unsigned long flags;
8e22978c	157	struct ci_hw_req *req = NULL;
cc9e6c49	158	struct td_node node, tmpnode;
8e22978c	159	unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32);
e443b333	160
2d651289 AS	161	if (ci->role != CI_ROLE_GADGET) {
2d651289 AS	162	seq_printf(s, "not in gadget mode\n");
e443b333 AS	163	return 0;
	164	}
	165
26c696c6 RZ	166	spin_lock_irqsave(&ci->lock, flags);
26c696c6 RZ	167	for (i = 0; i < ci->hw_ep_max; i++)
32540ba2	168	list_for_each_entry(req, &ci->ci_hw_ep[i].qh.queue, queue) {
cc9e6c49 MG	169	list_for_each_entry_safe(node, tmpnode, &req->tds, td) {
	170	seq_printf(s, "EP=%02i: TD=%08X %s\n",
	171	i % (ci->hw_ep_max / 2),
	172	(u32)node->dma,
	173	((i < ci->hw_ep_max/2) ?
	174	"RX" : "TX"));
	175
	176	for (j = 0; j < qsize; j++)
	177	seq_printf(s, " %04X: %08X\n", j,
	178	((u32 )node->ptr + j));
	179	}
e443b333	180	}
26c696c6	181	spin_unlock_irqrestore(&ci->lock, flags);
e443b333	182
2d651289 AS	183	return 0;
2d651289 AS	184	}
e8c56f27	185	DEFINE_SHOW_ATTRIBUTE(ci_requests);
e443b333	186
df40f8d3	187	static int ci_otg_show(struct seq_file s, void unused)
88bdffc8 LJ	188	{
	189	struct ci_hdrc *ci = s->private;
	190	struct otg_fsm *fsm;
	191
	192	if (!ci \|\| !ci_otg_is_fsm_mode(ci))
	193	return 0;
	194
	195	fsm = &ci->fsm;
	196
	197	/* ------ State ----- */
	198	seq_printf(s, "OTG state: %s\n\n",
ef44cb42	199	usb_otg_state_string(ci->otg.state));
88bdffc8 LJ	200
	201	/* ------ State Machine Variables ----- */
	202	seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop);
	203
	204	seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req);
	205
	206	seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det);
	207
	208	seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld);
	209
	210	seq_printf(s, "b_conn: %d\n", fsm->b_conn);
	211
	212	seq_printf(s, "adp_change: %d\n", fsm->adp_change);
	213
	214	seq_printf(s, "power_up: %d\n", fsm->power_up);
	215
	216	seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume);
	217
	218	seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend);
	219
	220	seq_printf(s, "a_conn: %d\n", fsm->a_conn);
	221
	222	seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req);
	223
	224	seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend);
	225
	226	seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp);
	227
	228	seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp);
	229
	230	seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld);
	231
	232	seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done);
	233
	234	seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus);
	235
	236	seq_printf(s, "loc_conn: %d\n", fsm->loc_conn);
	237
	238	seq_printf(s, "loc_sof: %d\n", fsm->loc_sof);
	239
	240	seq_printf(s, "adp_prb: %d\n", fsm->adp_prb);
	241
	242	seq_printf(s, "id: %d\n", fsm->id);
	243
	244	seq_printf(s, "protocol: %d\n", fsm->protocol);
	245
	246	return 0;
	247	}
e8c56f27	248	DEFINE_SHOW_ATTRIBUTE(ci_otg);
88bdffc8	249
c8e333a3 AS	250	static int ci_role_show(struct seq_file s, void data)
c8e333a3 AS	251	{
8e22978c	252	struct ci_hdrc *ci = s->private;
c8e333a3	253
0340ff83 MT	254	if (ci->role != CI_ROLE_END)
0340ff83 MT	255	seq_printf(s, "%s\n", ci_role(ci)->name);
c8e333a3 AS	256
	257	return 0;
	258	}
	259
	260	static ssize_t ci_role_write(struct file file, const char __user ubuf,
	261	size_t count, loff_t *ppos)
	262	{
	263	struct seq_file *s = file->private_data;
8e22978c	264	struct ci_hdrc *ci = s->private;
c8e333a3 AS	265	enum ci_role role;
	266	char buf[8];
	267	int ret;
	268
	269	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	270	return -EFAULT;
	271
	272	for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++)
	273	if (ci->roles[role] &&
	274	!strncmp(buf, ci->roles[role]->name,
	275	strlen(ci->roles[role]->name)))
	276	break;
	277
	278	if (role == CI_ROLE_END \|\| role == ci->role)
	279	return -EINVAL;
	280
bc249379	281	pm_runtime_get_sync(ci->dev);
251b3c8b	282	disable_irq(ci->irq);
c8e333a3 AS	283	ci_role_stop(ci);
c8e333a3 AS	284	ret = ci_role_start(ci, role);
251b3c8b	285	enable_irq(ci->irq);
bc249379	286	pm_runtime_put_sync(ci->dev);
c8e333a3 AS	287
	288	return ret ? ret : count;
	289	}
	290
	291	static int ci_role_open(struct inode inode, struct file file)
	292	{
	293	return single_open(file, ci_role_show, inode->i_private);
	294	}
	295
	296	static const struct file_operations ci_role_fops = {
	297	.open = ci_role_open,
	298	.write = ci_role_write,
	299	.read = seq_read,
	300	.llseek = seq_lseek,
	301	.release = single_release,
	302	};
	303
df40f8d3	304	static int ci_registers_show(struct seq_file s, void unused)
c4a8b639 LJ	305	{
	306	struct ci_hdrc *ci = s->private;
	307	u32 tmp_reg;
	308
0c4d6af4 LJ	309	if (!ci \|\| ci->in_lpm)
0c4d6af4 LJ	310	return -EPERM;
c4a8b639 LJ	311
	312	/* ------ Registers ----- */
	313	tmp_reg = hw_read_intr_enable(ci);
	314	seq_printf(s, "USBINTR reg: %08x\n", tmp_reg);
	315
	316	tmp_reg = hw_read_intr_status(ci);
	317	seq_printf(s, "USBSTS reg: %08x\n", tmp_reg);
	318
	319	tmp_reg = hw_read(ci, OP_USBMODE, ~0);
	320	seq_printf(s, "USBMODE reg: %08x\n", tmp_reg);
	321
	322	tmp_reg = hw_read(ci, OP_USBCMD, ~0);
	323	seq_printf(s, "USBCMD reg: %08x\n", tmp_reg);
	324
	325	tmp_reg = hw_read(ci, OP_PORTSC, ~0);
	326	seq_printf(s, "PORTSC reg: %08x\n", tmp_reg);
	327
	328	if (ci->is_otg) {
	329	tmp_reg = hw_read_otgsc(ci, ~0);
	330	seq_printf(s, "OTGSC reg: %08x\n", tmp_reg);
	331	}
	332
	333	return 0;
	334	}
e8c56f27	335	DEFINE_SHOW_ATTRIBUTE(ci_registers);
c4a8b639	336
e443b333 AS	337	/**
e443b333 AS	338	* dbg_create_files: initializes the attribute interface
2d651289	339	* @ci: device
e443b333 AS	340	*
	341	* This function returns an error code
	342	*/
a61b75d1	343	void dbg_create_files(struct ci_hdrc *ci)
e443b333	344	{
2d651289	345	ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL);
2d651289	346
a61b75d1 GKH	347	debugfs_create_file("device", S_IRUGO, ci->debugfs, ci,
	348	&ci_device_fops);
	349	debugfs_create_file("port_test", S_IRUGO \| S_IWUSR, ci->debugfs, ci,
	350	&ci_port_test_fops);
	351	debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci,
	352	&ci_qheads_fops);
	353	debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci,
	354	&ci_requests_fops);
c8e333a3	355
88bdffc8	356	if (ci_otg_is_fsm_mode(ci)) {
a61b75d1 GKH	357	debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci,
a61b75d1 GKH	358	&ci_otg_fops);
88bdffc8 LJ	359	}
88bdffc8 LJ	360
a61b75d1 GKH	361	debugfs_create_file("role", S_IRUGO \| S_IWUSR, ci->debugfs, ci,
	362	&ci_role_fops);
	363	debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci,
	364	&ci_registers_fops);
e443b333 AS	365	}
	366
	367	/**
	368	* dbg_remove_files: destroys the attribute interface
2d651289	369	* @ci: device
e443b333	370	*/
8e22978c	371	void dbg_remove_files(struct ci_hdrc *ci)
e443b333	372	{
2d651289	373	debugfs_remove_recursive(ci->debugfs);
e443b333	374	}