1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Freescale QUICC Engine USB Host Controller Driver
4  *
5  * Copyright (c) Freescale Semicondutor, Inc. 2006.
6  *               Shlomi Gridish <gridish@freescale.com>
7  *               Jerry Huang <Chang-Ming.Huang@freescale.com>
8  * Copyright (c) Logic Product Development, Inc. 2007
9  *               Peter Barada <peterb@logicpd.com>
10  * Copyright (c) MontaVista Software, Inc. 2008.
11  *               Anton Vorontsov <avorontsov@ru.mvista.com>
12  */
13 
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/debugfs.h>
17 #include <linux/seq_file.h>
18 #include <linux/usb.h>
19 #include <linux/usb/hcd.h>
20 #include "fhci.h"
21 
fhci_dbg_isr(struct fhci_hcd * fhci,int usb_er)22 void fhci_dbg_isr(struct fhci_hcd *fhci, int usb_er)
23 {
24 	int i;
25 
26 	if (usb_er == -1) {
27 		fhci->usb_irq_stat[12]++;
28 		return;
29 	}
30 
31 	for (i = 0; i < 12; ++i) {
32 		if (usb_er & (1 << i))
33 			fhci->usb_irq_stat[i]++;
34 	}
35 }
36 
fhci_dfs_regs_show(struct seq_file * s,void * v)37 static int fhci_dfs_regs_show(struct seq_file *s, void *v)
38 {
39 	struct fhci_hcd *fhci = s->private;
40 	struct qe_usb_ctlr __iomem *regs = fhci->regs;
41 
42 	seq_printf(s,
43 		"mode: 0x%x\n" "addr: 0x%x\n"
44 		"command: 0x%x\n" "ep0: 0x%x\n"
45 		"event: 0x%x\n" "mask: 0x%x\n"
46 		"status: 0x%x\n" "SOF timer: %d\n"
47 		"frame number: %d\n"
48 		"lines status: 0x%x\n",
49 		in_8(&regs->usb_usmod), in_8(&regs->usb_usadr),
50 		in_8(&regs->usb_uscom), in_be16(&regs->usb_usep[0]),
51 		in_be16(&regs->usb_usber), in_be16(&regs->usb_usbmr),
52 		in_8(&regs->usb_usbs), in_be16(&regs->usb_ussft),
53 		in_be16(&regs->usb_usfrn),
54 		fhci_ioports_check_bus_state(fhci));
55 
56 	return 0;
57 }
58 DEFINE_SHOW_ATTRIBUTE(fhci_dfs_regs);
59 
fhci_dfs_irq_stat_show(struct seq_file * s,void * v)60 static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v)
61 {
62 	struct fhci_hcd *fhci = s->private;
63 	int *usb_irq_stat = fhci->usb_irq_stat;
64 
65 	seq_printf(s,
66 		"RXB: %d\n" "TXB: %d\n" "BSY: %d\n"
67 		"SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n"
68 		"TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n"
69 		"RESET: %d\n" "SFT: %d\n" "MSF: %d\n"
70 		"IDLE_ONLY: %d\n",
71 		usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2],
72 		usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5],
73 		usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8],
74 		usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11],
75 		usb_irq_stat[12]);
76 
77 	return 0;
78 }
79 DEFINE_SHOW_ATTRIBUTE(fhci_dfs_irq_stat);
80 
fhci_dfs_create(struct fhci_hcd * fhci)81 void fhci_dfs_create(struct fhci_hcd *fhci)
82 {
83 	struct device *dev = fhci_to_hcd(fhci)->self.controller;
84 
85 	fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
86 
87 	debugfs_create_file("regs", S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
88 			    &fhci_dfs_regs_fops);
89 	debugfs_create_file("irq_stat", S_IFREG | S_IRUGO, fhci->dfs_root, fhci,
90 			    &fhci_dfs_irq_stat_fops);
91 }
92 
fhci_dfs_destroy(struct fhci_hcd * fhci)93 void fhci_dfs_destroy(struct fhci_hcd *fhci)
94 {
95 	debugfs_remove_recursive(fhci->dfs_root);
96 }
97