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 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 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(®s->usb_usmod), in_8(®s->usb_usadr), 50 in_8(®s->usb_uscom), in_be16(®s->usb_usep[0]), 51 in_be16(®s->usb_usber), in_be16(®s->usb_usbmr), 52 in_8(®s->usb_usbs), in_be16(®s->usb_ussft), 53 in_be16(®s->usb_usfrn), 54 fhci_ioports_check_bus_state(fhci)); 55 56 return 0; 57 } 58 59 static int fhci_dfs_irq_stat_show(struct seq_file *s, void *v) 60 { 61 struct fhci_hcd *fhci = s->private; 62 int *usb_irq_stat = fhci->usb_irq_stat; 63 64 seq_printf(s, 65 "RXB: %d\n" "TXB: %d\n" "BSY: %d\n" 66 "SOF: %d\n" "TXE0: %d\n" "TXE1: %d\n" 67 "TXE2: %d\n" "TXE3: %d\n" "IDLE: %d\n" 68 "RESET: %d\n" "SFT: %d\n" "MSF: %d\n" 69 "IDLE_ONLY: %d\n", 70 usb_irq_stat[0], usb_irq_stat[1], usb_irq_stat[2], 71 usb_irq_stat[3], usb_irq_stat[4], usb_irq_stat[5], 72 usb_irq_stat[6], usb_irq_stat[7], usb_irq_stat[8], 73 usb_irq_stat[9], usb_irq_stat[10], usb_irq_stat[11], 74 usb_irq_stat[12]); 75 76 return 0; 77 } 78 79 static int fhci_dfs_regs_open(struct inode *inode, struct file *file) 80 { 81 return single_open(file, fhci_dfs_regs_show, inode->i_private); 82 } 83 84 static int fhci_dfs_irq_stat_open(struct inode *inode, struct file *file) 85 { 86 return single_open(file, fhci_dfs_irq_stat_show, inode->i_private); 87 } 88 89 static const struct file_operations fhci_dfs_regs_fops = { 90 .open = fhci_dfs_regs_open, 91 .read = seq_read, 92 .llseek = seq_lseek, 93 .release = single_release, 94 }; 95 96 static const struct file_operations fhci_dfs_irq_stat_fops = { 97 .open = fhci_dfs_irq_stat_open, 98 .read = seq_read, 99 .llseek = seq_lseek, 100 .release = single_release, 101 }; 102 103 void fhci_dfs_create(struct fhci_hcd *fhci) 104 { 105 struct device *dev = fhci_to_hcd(fhci)->self.controller; 106 107 fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root); 108 if (!fhci->dfs_root) { 109 WARN_ON(1); 110 return; 111 } 112 113 fhci->dfs_regs = debugfs_create_file("regs", S_IFREG | S_IRUGO, 114 fhci->dfs_root, fhci, &fhci_dfs_regs_fops); 115 116 fhci->dfs_irq_stat = debugfs_create_file("irq_stat", 117 S_IFREG | S_IRUGO, fhci->dfs_root, fhci, 118 &fhci_dfs_irq_stat_fops); 119 120 WARN_ON(!fhci->dfs_regs || !fhci->dfs_irq_stat); 121 } 122 123 void fhci_dfs_destroy(struct fhci_hcd *fhci) 124 { 125 if (!fhci->dfs_root) 126 return; 127 128 debugfs_remove(fhci->dfs_irq_stat); 129 debugfs_remove(fhci->dfs_regs); 130 debugfs_remove(fhci->dfs_root); 131 } 132