diff options
Diffstat (limited to 'drivers/usb/dwc3/debugfs.c')
| -rw-r--r-- | drivers/usb/dwc3/debugfs.c | 1359 |
1 files changed, 1359 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c new file mode 100644 index 000000000000..2c00b3596055 --- /dev/null +++ b/drivers/usb/dwc3/debugfs.c @@ -0,0 +1,1359 @@ +/** + * debugfs.c - DesignWare USB3 DRD Controller DebugFS file + * + * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com + * + * Authors: Felipe Balbi <balbi@ti.com>, + * Sebastian Andrzej Siewior <bigeasy@linutronix.de> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 of + * the License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/ptrace.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/delay.h> +#include <linux/uaccess.h> + +#include <linux/usb/ch9.h> + +#include "core.h" +#include "gadget.h" +#include "io.h" +#include "debug.h" + +#define dump_register(nm) \ +{ \ + .name = __stringify(nm), \ + .offset = DWC3_ ##nm - DWC3_GLOBALS_REGS_START, \ +} + +#define ep_event_rate(ev, c, p, dt) \ + ((dt) ? ((c.ev - p.ev) * (MSEC_PER_SEC)) / (dt) : 0) + +static const struct debugfs_reg32 dwc3_regs[] = { + dump_register(GSBUSCFG0), + dump_register(GSBUSCFG1), + dump_register(GTXTHRCFG), + dump_register(GRXTHRCFG), + dump_register(GCTL), + dump_register(GEVTEN), + dump_register(GSTS), + dump_register(GSNPSID), + dump_register(GGPIO), + dump_register(GUID), + dump_register(GUCTL), + dump_register(GBUSERRADDR0), + dump_register(GBUSERRADDR1), + dump_register(GPRTBIMAP0), + dump_register(GPRTBIMAP1), + dump_register(GHWPARAMS0), + dump_register(GHWPARAMS1), + dump_register(GHWPARAMS2), + dump_register(GHWPARAMS3), + dump_register(GHWPARAMS4), + dump_register(GHWPARAMS5), + dump_register(GHWPARAMS6), + dump_register(GHWPARAMS7), + dump_register(GDBGFIFOSPACE), + dump_register(GDBGLTSSM), + dump_register(GPRTBIMAP_HS0), + dump_register(GPRTBIMAP_HS1), + dump_register(GPRTBIMAP_FS0), + dump_register(GPRTBIMAP_FS1), + + dump_register(GUSB2PHYCFG(0)), + dump_register(GUSB2PHYCFG(1)), + dump_register(GUSB2PHYCFG(2)), + dump_register(GUSB2PHYCFG(3)), + dump_register(GUSB2PHYCFG(4)), + dump_register(GUSB2PHYCFG(5)), + dump_register(GUSB2PHYCFG(6)), + dump_register(GUSB2PHYCFG(7)), + dump_register(GUSB2PHYCFG(8)), + dump_register(GUSB2PHYCFG(9)), + dump_register(GUSB2PHYCFG(10)), + dump_register(GUSB2PHYCFG(11)), + dump_register(GUSB2PHYCFG(12)), + dump_register(GUSB2PHYCFG(13)), + dump_register(GUSB2PHYCFG(14)), + dump_register(GUSB2PHYCFG(15)), + + dump_register(GUSB2I2CCTL(0)), + dump_register(GUSB2I2CCTL(1)), + dump_register(GUSB2I2CCTL(2)), + dump_register(GUSB2I2CCTL(3)), + dump_register(GUSB2I2CCTL(4)), + dump_register(GUSB2I2CCTL(5)), + dump_register(GUSB2I2CCTL(6)), + dump_register(GUSB2I2CCTL(7)), + dump_register(GUSB2I2CCTL(8)), + dump_register(GUSB2I2CCTL(9)), + dump_register(GUSB2I2CCTL(10)), + dump_register(GUSB2I2CCTL(11)), + dump_register(GUSB2I2CCTL(12)), + dump_register(GUSB2I2CCTL(13)), + dump_register(GUSB2I2CCTL(14)), + dump_register(GUSB2I2CCTL(15)), + + dump_register(GUSB2PHYACC(0)), + dump_register(GUSB2PHYACC(1)), + dump_register(GUSB2PHYACC(2)), + dump_register(GUSB2PHYACC(3)), + dump_register(GUSB2PHYACC(4)), + dump_register(GUSB2PHYACC(5)), + dump_register(GUSB2PHYACC(6)), + dump_register(GUSB2PHYACC(7)), + dump_register(GUSB2PHYACC(8)), + dump_register(GUSB2PHYACC(9)), + dump_register(GUSB2PHYACC(10)), + dump_register(GUSB2PHYACC(11)), + dump_register(GUSB2PHYACC(12)), + dump_register(GUSB2PHYACC(13)), + dump_register(GUSB2PHYACC(14)), + dump_register(GUSB2PHYACC(15)), + + dump_register(GUSB3PIPECTL(0)), + dump_register(GUSB3PIPECTL(1)), + dump_register(GUSB3PIPECTL(2)), + dump_register(GUSB3PIPECTL(3)), + dump_register(GUSB3PIPECTL(4)), + dump_register(GUSB3PIPECTL(5)), + dump_register(GUSB3PIPECTL(6)), + dump_register(GUSB3PIPECTL(7)), + dump_register(GUSB3PIPECTL(8)), + dump_register(GUSB3PIPECTL(9)), + dump_register(GUSB3PIPECTL(10)), + dump_register(GUSB3PIPECTL(11)), + dump_register(GUSB3PIPECTL(12)), + dump_register(GUSB3PIPECTL(13)), + dump_register(GUSB3PIPECTL(14)), + dump_register(GUSB3PIPECTL(15)), + + dump_register(GTXFIFOSIZ(0)), + dump_register(GTXFIFOSIZ(1)), + dump_register(GTXFIFOSIZ(2)), + dump_register(GTXFIFOSIZ(3)), + dump_register(GTXFIFOSIZ(4)), + dump_register(GTXFIFOSIZ(5)), + dump_register(GTXFIFOSIZ(6)), + dump_register(GTXFIFOSIZ(7)), + dump_register(GTXFIFOSIZ(8)), + dump_register(GTXFIFOSIZ(9)), + dump_register(GTXFIFOSIZ(10)), + dump_register(GTXFIFOSIZ(11)), + dump_register(GTXFIFOSIZ(12)), + dump_register(GTXFIFOSIZ(13)), + dump_register(GTXFIFOSIZ(14)), + dump_register(GTXFIFOSIZ(15)), + dump_register(GTXFIFOSIZ(16)), + dump_register(GTXFIFOSIZ(17)), + dump_register(GTXFIFOSIZ(18)), + dump_register(GTXFIFOSIZ(19)), + dump_register(GTXFIFOSIZ(20)), + dump_register(GTXFIFOSIZ(21)), + dump_register(GTXFIFOSIZ(22)), + dump_register(GTXFIFOSIZ(23)), + dump_register(GTXFIFOSIZ(24)), + dump_register(GTXFIFOSIZ(25)), + dump_register(GTXFIFOSIZ(26)), + dump_register(GTXFIFOSIZ(27)), + dump_register(GTXFIFOSIZ(28)), + dump_register(GTXFIFOSIZ(29)), + dump_register(GTXFIFOSIZ(30)), + dump_register(GTXFIFOSIZ(31)), + + dump_register(GRXFIFOSIZ(0)), + dump_register(GRXFIFOSIZ(1)), + dump_register(GRXFIFOSIZ(2)), + dump_register(GRXFIFOSIZ(3)), + dump_register(GRXFIFOSIZ(4)), + dump_register(GRXFIFOSIZ(5)), + dump_register(GRXFIFOSIZ(6)), + dump_register(GRXFIFOSIZ(7)), + dump_register(GRXFIFOSIZ(8)), + dump_register(GRXFIFOSIZ(9)), + dump_register(GRXFIFOSIZ(10)), + dump_register(GRXFIFOSIZ(11)), + dump_register(GRXFIFOSIZ(12)), + dump_register(GRXFIFOSIZ(13)), + dump_register(GRXFIFOSIZ(14)), + dump_register(GRXFIFOSIZ(15)), + dump_register(GRXFIFOSIZ(16)), + dump_register(GRXFIFOSIZ(17)), + dump_register(GRXFIFOSIZ(18)), + dump_register(GRXFIFOSIZ(19)), + dump_register(GRXFIFOSIZ(20)), + dump_register(GRXFIFOSIZ(21)), + dump_register(GRXFIFOSIZ(22)), + dump_register(GRXFIFOSIZ(23)), + dump_register(GRXFIFOSIZ(24)), + dump_register(GRXFIFOSIZ(25)), + dump_register(GRXFIFOSIZ(26)), + dump_register(GRXFIFOSIZ(27)), + dump_register(GRXFIFOSIZ(28)), + dump_register(GRXFIFOSIZ(29)), + dump_register(GRXFIFOSIZ(30)), + dump_register(GRXFIFOSIZ(31)), + + dump_register(GEVNTADRLO(0)), + dump_register(GEVNTADRHI(0)), + dump_register(GEVNTSIZ(0)), + dump_register(GEVNTCOUNT(0)), + + dump_register(GHWPARAMS8), + dump_register(GFLADJ), + dump_register(DCFG), + dump_register(DCTL), + dump_register(DEVTEN), + dump_register(DSTS), + dump_register(DGCMDPAR), + dump_register(DGCMD), + dump_register(DALEPENA), + + dump_register(DEPCMDPAR2(0)), + dump_register(DEPCMDPAR2(1)), + dump_register(DEPCMDPAR2(2)), + dump_register(DEPCMDPAR2(3)), + dump_register(DEPCMDPAR2(4)), + dump_register(DEPCMDPAR2(5)), + dump_register(DEPCMDPAR2(6)), + dump_register(DEPCMDPAR2(7)), + dump_register(DEPCMDPAR2(8)), + dump_register(DEPCMDPAR2(9)), + dump_register(DEPCMDPAR2(10)), + dump_register(DEPCMDPAR2(11)), + dump_register(DEPCMDPAR2(12)), + dump_register(DEPCMDPAR2(13)), + dump_register(DEPCMDPAR2(14)), + dump_register(DEPCMDPAR2(15)), + dump_register(DEPCMDPAR2(16)), + dump_register(DEPCMDPAR2(17)), + dump_register(DEPCMDPAR2(18)), + dump_register(DEPCMDPAR2(19)), + dump_register(DEPCMDPAR2(20)), + dump_register(DEPCMDPAR2(21)), + dump_register(DEPCMDPAR2(22)), + dump_register(DEPCMDPAR2(23)), + dump_register(DEPCMDPAR2(24)), + dump_register(DEPCMDPAR2(25)), + dump_register(DEPCMDPAR2(26)), + dump_register(DEPCMDPAR2(27)), + dump_register(DEPCMDPAR2(28)), + dump_register(DEPCMDPAR2(29)), + dump_register(DEPCMDPAR2(30)), + dump_register(DEPCMDPAR2(31)), + + dump_register(DEPCMDPAR1(0)), + dump_register(DEPCMDPAR1(1)), + dump_register(DEPCMDPAR1(2)), + dump_register(DEPCMDPAR1(3)), + dump_register(DEPCMDPAR1(4)), + dump_register(DEPCMDPAR1(5)), + dump_register(DEPCMDPAR1(6)), + dump_register(DEPCMDPAR1(7)), + dump_register(DEPCMDPAR1(8)), + dump_register(DEPCMDPAR1(9)), + dump_register(DEPCMDPAR1(10)), + dump_register(DEPCMDPAR1(11)), + dump_register(DEPCMDPAR1(12)), + dump_register(DEPCMDPAR1(13)), + dump_register(DEPCMDPAR1(14)), + dump_register(DEPCMDPAR1(15)), + dump_register(DEPCMDPAR1(16)), + dump_register(DEPCMDPAR1(17)), + dump_register(DEPCMDPAR1(18)), + dump_register(DEPCMDPAR1(19)), + dump_register(DEPCMDPAR1(20)), + dump_register(DEPCMDPAR1(21)), + dump_register(DEPCMDPAR1(22)), + dump_register(DEPCMDPAR1(23)), + dump_register(DEPCMDPAR1(24)), + dump_register(DEPCMDPAR1(25)), + dump_register(DEPCMDPAR1(26)), + dump_register(DEPCMDPAR1(27)), + dump_register(DEPCMDPAR1(28)), + dump_register(DEPCMDPAR1(29)), + dump_register(DEPCMDPAR1(30)), + dump_register(DEPCMDPAR1(31)), + + dump_register(DEPCMDPAR0(0)), + dump_register(DEPCMDPAR0(1)), + dump_register(DEPCMDPAR0(2)), + dump_register(DEPCMDPAR0(3)), + dump_register(DEPCMDPAR0(4)), + dump_register(DEPCMDPAR0(5)), + dump_register(DEPCMDPAR0(6)), + dump_register(DEPCMDPAR0(7)), + dump_register(DEPCMDPAR0(8)), + dump_register(DEPCMDPAR0(9)), + dump_register(DEPCMDPAR0(10)), + dump_register(DEPCMDPAR0(11)), + dump_register(DEPCMDPAR0(12)), + dump_register(DEPCMDPAR0(13)), + dump_register(DEPCMDPAR0(14)), + dump_register(DEPCMDPAR0(15)), + dump_register(DEPCMDPAR0(16)), + dump_register(DEPCMDPAR0(17)), + dump_register(DEPCMDPAR0(18)), + dump_register(DEPCMDPAR0(19)), + dump_register(DEPCMDPAR0(20)), + dump_register(DEPCMDPAR0(21)), + dump_register(DEPCMDPAR0(22)), + dump_register(DEPCMDPAR0(23)), + dump_register(DEPCMDPAR0(24)), + dump_register(DEPCMDPAR0(25)), + dump_register(DEPCMDPAR0(26)), + dump_register(DEPCMDPAR0(27)), + dump_register(DEPCMDPAR0(28)), + dump_register(DEPCMDPAR0(29)), + dump_register(DEPCMDPAR0(30)), + dump_register(DEPCMDPAR0(31)), + + dump_register(DEPCMD(0)), + dump_register(DEPCMD(1)), + dump_register(DEPCMD(2)), + dump_register(DEPCMD(3)), + dump_register(DEPCMD(4)), + dump_register(DEPCMD(5)), + dump_register(DEPCMD(6)), + dump_register(DEPCMD(7)), + dump_register(DEPCMD(8)), + dump_register(DEPCMD(9)), + dump_register(DEPCMD(10)), + dump_register(DEPCMD(11)), + dump_register(DEPCMD(12)), + dump_register(DEPCMD(13)), + dump_register(DEPCMD(14)), + dump_register(DEPCMD(15)), + dump_register(DEPCMD(16)), + dump_register(DEPCMD(17)), + dump_register(DEPCMD(18)), + dump_register(DEPCMD(19)), + dump_register(DEPCMD(20)), + dump_register(DEPCMD(21)), + dump_register(DEPCMD(22)), + dump_register(DEPCMD(23)), + dump_register(DEPCMD(24)), + dump_register(DEPCMD(25)), + dump_register(DEPCMD(26)), + dump_register(DEPCMD(27)), + dump_register(DEPCMD(28)), + dump_register(DEPCMD(29)), + dump_register(DEPCMD(30)), + dump_register(DEPCMD(31)), + + dump_register(OCFG), + dump_register(OCTL), + dump_register(OEVT), + dump_register(OEVTEN), + dump_register(OSTS), +}; + +static int dwc3_mode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + + if (atomic_read(&dwc->in_lpm)) { + seq_puts(s, "USB device is powered off\n"); + return 0; + } + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_GCTL); + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (DWC3_GCTL_PRTCAP(reg)) { + case DWC3_GCTL_PRTCAP_HOST: + seq_printf(s, "host\n"); + break; + case DWC3_GCTL_PRTCAP_DEVICE: + seq_printf(s, "device\n"); + break; + case DWC3_GCTL_PRTCAP_OTG: + seq_printf(s, "OTG\n"); + break; + default: + seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg)); + } + + return 0; +} + +static int dwc3_mode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_mode_show, inode->i_private); +} + +static ssize_t dwc3_mode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 mode = 0; + char buf[32] = {}; + + if (atomic_read(&dwc->in_lpm)) { + dev_err(dwc->dev, "USB device is powered off\n"); + return count; + } + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "host", 4)) + mode |= DWC3_GCTL_PRTCAP_HOST; + + if (!strncmp(buf, "device", 6)) + mode |= DWC3_GCTL_PRTCAP_DEVICE; + + if (!strncmp(buf, "otg", 3)) + mode |= DWC3_GCTL_PRTCAP_OTG; + + if (mode) { + spin_lock_irqsave(&dwc->lock, flags); + dwc3_set_mode(dwc, mode); + spin_unlock_irqrestore(&dwc->lock, flags); + } + return count; +} + +static const struct file_operations dwc3_mode_fops = { + .open = dwc3_mode_open, + .write = dwc3_mode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_testmode_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 reg; + + + if (atomic_read(&dwc->in_lpm)) { + seq_puts(s, "USB device is powered off\n"); + return 0; + } + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg &= DWC3_DCTL_TSTCTRL_MASK; + reg >>= 1; + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (reg) { + case 0: + seq_printf(s, "no test\n"); + break; + case TEST_J: + seq_printf(s, "test_j\n"); + break; + case TEST_K: + seq_printf(s, "test_k\n"); + break; + case TEST_SE0_NAK: + seq_printf(s, "test_se0_nak\n"); + break; + case TEST_PACKET: + seq_printf(s, "test_packet\n"); + break; + case TEST_FORCE_EN: + seq_printf(s, "test_force_enable\n"); + break; + default: + seq_printf(s, "UNKNOWN %d\n", reg); + } + + return 0; +} + +static int dwc3_testmode_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_testmode_show, inode->i_private); +} + +static ssize_t dwc3_testmode_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + u32 testmode = 0; + char buf[32] = {}; + + if (atomic_read(&dwc->in_lpm)) { + seq_puts(s, "USB device is powered off\n"); + return count; + } + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "test_j", 6)) + testmode = TEST_J; + else if (!strncmp(buf, "test_k", 6)) + testmode = TEST_K; + else if (!strncmp(buf, "test_se0_nak", 12)) + testmode = TEST_SE0_NAK; + else if (!strncmp(buf, "test_packet", 11)) + testmode = TEST_PACKET; + else if (!strncmp(buf, "test_force_enable", 17)) + testmode = TEST_FORCE_EN; + else + testmode = 0; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_set_test_mode(dwc, testmode); + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static const struct file_operations dwc3_testmode_fops = { + .open = dwc3_testmode_open, + .write = dwc3_testmode_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_link_state_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state; + u32 reg; + + if (atomic_read(&dwc->in_lpm)) { + seq_puts(s, "USB device is powered off\n"); + return 0; + } + + spin_lock_irqsave(&dwc->lock, flags); + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + state = DWC3_DSTS_USBLNKST(reg); + spin_unlock_irqrestore(&dwc->lock, flags); + + switch (state) { + case DWC3_LINK_STATE_U0: + seq_printf(s, "U0\n"); + break; + case DWC3_LINK_STATE_U1: + seq_printf(s, "U1\n"); + break; + case DWC3_LINK_STATE_U2: + seq_printf(s, "U2\n"); + break; + case DWC3_LINK_STATE_U3: + seq_printf(s, "U3\n"); + break; + case DWC3_LINK_STATE_SS_DIS: + seq_printf(s, "SS.Disabled\n"); + break; + case DWC3_LINK_STATE_RX_DET: + seq_printf(s, "Rx.Detect\n"); + break; + case DWC3_LINK_STATE_SS_INACT: + seq_printf(s, "SS.Inactive\n"); + break; + case DWC3_LINK_STATE_POLL: + seq_printf(s, "Poll\n"); + break; + case DWC3_LINK_STATE_RECOV: + seq_printf(s, "Recovery\n"); + break; + case DWC3_LINK_STATE_HRESET: + seq_printf(s, "HRESET\n"); + break; + case DWC3_LINK_STATE_CMPLY: + seq_printf(s, "Compliance\n"); + break; + case DWC3_LINK_STATE_LPBK: + seq_printf(s, "Loopback\n"); + break; + case DWC3_LINK_STATE_RESET: + seq_printf(s, "Reset\n"); + break; + case DWC3_LINK_STATE_RESUME: + seq_printf(s, "Resume\n"); + break; + default: + seq_printf(s, "UNKNOWN %d\n", state); + } + + return 0; +} + +static int dwc3_link_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_link_state_show, inode->i_private); +} + +static ssize_t dwc3_link_state_write(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + unsigned long flags; + enum dwc3_link_state state = 0; + char buf[32] = {}; + + if (atomic_read(&dwc->in_lpm)) { + seq_puts(s, "USB device is powered off\n"); + return count; + } + + if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (!strncmp(buf, "SS.Disabled", 11)) + state = DWC3_LINK_STATE_SS_DIS; + else if (!strncmp(buf, "Rx.Detect", 9)) + state = DWC3_LINK_STATE_RX_DET; + else if (!strncmp(buf, "SS.Inactive", 11)) + state = DWC3_LINK_STATE_SS_INACT; + else if (!strncmp(buf, "Recovery", 8)) + state = DWC3_LINK_STATE_RECOV; + else if (!strncmp(buf, "Compliance", 10)) + state = DWC3_LINK_STATE_CMPLY; + else if (!strncmp(buf, "Loopback", 8)) + state = DWC3_LINK_STATE_LPBK; + else + return -EINVAL; + + spin_lock_irqsave(&dwc->lock, flags); + dwc3_gadget_set_link_state(dwc, state); + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static const struct file_operations dwc3_link_state_fops = { + .open = dwc3_link_state_open, + .write = dwc3_link_state_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int ep_num; +static ssize_t dwc3_store_ep_num(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) +{ + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + char kbuf[10] = {}; + unsigned int num, dir, temp; + unsigned long flags; + + if (copy_from_user(kbuf, ubuf, min_t(size_t, sizeof(kbuf) - 1, count))) + return -EFAULT; + + if (sscanf(kbuf, "%u %u", &num, &dir) != 2) + return -EINVAL; + + if (dir != 0 && dir != 1) + return -EINVAL; + + temp = (num << 1) + dir; + if (temp >= (dwc->num_in_eps + dwc->num_out_eps) || + temp >= DWC3_ENDPOINTS_NUM) + return -EINVAL; + + spin_lock_irqsave(&dwc->lock, flags); + ep_num = temp; + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static int dwc3_ep_req_list_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + struct dwc3_ep *dep; + struct dwc3_request *req = NULL; + struct list_head *ptr = NULL; + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + dep = dwc->eps[ep_num]; + + seq_printf(s, "%s request list: flags: 0x%x\n", dep->name, dep->flags); + list_for_each(ptr, &dep->request_list) { + req = list_entry(ptr, struct dwc3_request, list); + + seq_printf(s, + "req:0x%pK len: %d sts: %d dma:0x%pa num_sgs: %d\n", + req, req->request.length, req->request.status, + &req->request.dma, req->request.num_sgs); + } + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static int dwc3_ep_req_list_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_ep_req_list_show, inode->i_private); +} + +static const struct file_operations dwc3_ep_req_list_fops = { + .open = dwc3_ep_req_list_open, + .write = dwc3_store_ep_num, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_ep_queued_req_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + struct dwc3_ep *dep; + struct dwc3_request *req = NULL; + struct list_head *ptr = NULL; + unsigned long flags; + + spin_lock_irqsave(&dwc->lock, flags); + dep = dwc->eps[ep_num]; + + seq_printf(s, "%s queued reqs to HW: flags:0x%x\n", dep->name, + dep->flags); + list_for_each(ptr, &dep->req_queued) { + req = list_entry(ptr, struct dwc3_request, list); + + seq_printf(s, + "req:0x%pK len:%d sts:%d dma:%pa nsg:%d trb:0x%pK\n", + req, req->request.length, req->request.status, + &req->request.dma, req->request.num_sgs, req->trb); + } + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static int dwc3_ep_queued_req_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_ep_queued_req_show, inode->i_private); +} + +const struct file_operations dwc3_ep_req_queued_fops = { + .open = dwc3_ep_queued_req_open, + .write = dwc3_store_ep_num, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dwc3_ep_trbs_show(struct seq_file *s, void *unused) +{ + struct dwc3 *dwc = s->private; + struct dwc3_ep *dep; + struct dwc3_trb *trb; + unsigned long flags; + int j; + + if (!ep_num) + return 0; + + spin_lock_irqsave(&dwc->lock, flags); + dep = dwc->eps[ep_num]; + + seq_printf(s, "%s trb pool: flags:0x%x freeslot:%d busyslot:%d\n", + dep->name, dep->flags, dep->free_slot, dep->busy_slot); + for (j = 0; j < DWC3_TRB_NUM; j++) { + trb = &dep->trb_pool[j]; + seq_printf(s, "trb:0x%pK bph:0x%x bpl:0x%x size:0x%x ctrl: %x\n", + trb, trb->bph, trb->bpl, trb->size, trb->ctrl); + } + spin_unlock_irqrestore(&dwc->lock, flags); + + return 0; +} + +static int dwc3_ep_trbs_list_open(struct inode *inode, struct file *file) +{ + return single_open(file, dwc3_ep_trbs_show, inode->i_private); +} + +const struct file_operations dwc3_ep_trb_list_fops = { + .open = dwc3_ep_trbs_list_open, + .write = dwc3_store_ep_num, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static unsigned int ep_addr_rxdbg_mask = 1; +module_param(ep_addr_rxdbg_mask, uint, S_IRUGO | S_IWUSR); +static unsigned int ep_addr_txdbg_mask = 1; +module_param(ep_addr_txdbg_mask, uint, S_IRUGO | S_IWUSR); + +/* Maximum debug message length */ +#define DBG_DATA_MSG 64UL + +/* Maximum number of messages */ +#define DBG_DATA_MAX 2048UL + +static struct { + char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */ + unsigned idx; /* index */ + unsigned tty; /* print to console? */ + rwlock_t lck; /* lock */ +} dbg_dwc3_data = { + .idx = 0, + .tty = 0, + .lck = __RW_LOCK_UNLOCKED(lck) +}; + +/** + * dbg_dec: decrements debug event index + * @idx: buffer index + */ +static inline void __maybe_unused dbg_dec(unsigned *idx) +{ + *idx = (*idx - 1) % DBG_DATA_MAX; +} + +/** + * dbg_inc: increments debug event index + * @idx: buffer index + */ +static inline void dbg_inc(unsigned *idx) +{ + *idx = (*idx + 1) % DBG_DATA_MAX; +} + +#define TIME_BUF_LEN 20 +/*get_timestamp - returns time of day in us */ +static char *get_timestamp(char *tbuf) +{ + unsigned long long t; + unsigned long nanosec_rem; + + t = cpu_clock(smp_processor_id()); + nanosec_rem = do_div(t, 1000000000)/1000; + scnprintf(tbuf, TIME_BUF_LEN, "[%5lu.%06lu] ", (unsigned long)t, + nanosec_rem); + return tbuf; +} + +static int allow_dbg_print(u8 ep_num) +{ + int dir, num; + + /* allow bus wide events */ + if (ep_num == 0xff) + return 1; + + dir = ep_num & 0x1; + num = ep_num >> 1; + num = 1 << num; + + if (dir && (num & ep_addr_txdbg_mask)) + return 1; + if (!dir && (num & ep_addr_rxdbg_mask)) + return 1; + + return 0; +} + +/** + * dbg_print: prints the common part of the event + * @addr: endpoint address + * @name: event name + * @status: status + * @extra: extra information + */ +void dbg_print(u8 ep_num, const char *name, int status, const char *extra) +{ + unsigned long flags; + char tbuf[TIME_BUF_LEN]; + + if (!allow_dbg_print(ep_num)) + return; + + write_lock_irqsave(&dbg_dwc3_data.lck, flags); + + scnprintf(dbg_dwc3_data.buf[dbg_dwc3_data.idx], DBG_DATA_MSG, + "%s\t? %02X %-12.12s %4i ?\t%s\n", + get_timestamp(tbuf), ep_num, name, status, extra); + + dbg_inc(&dbg_dwc3_data.idx); + + write_unlock_irqrestore(&dbg_dwc3_data.lck, flags); + + if (dbg_dwc3_data.tty != 0) + pr_notice("%s\t? %02X %-7.7s %4i ?\t%s\n", + get_timestamp(tbuf), ep_num, name, status, extra); +} + +/** + * dbg_done: prints a DONE event + * @addr: endpoint address + * @td: transfer descriptor + * @status: status + */ +void dbg_done(u8 ep_num, const u32 count, int status) +{ + char msg[DBG_DATA_MSG]; + + if (!allow_dbg_print(ep_num)) + return; + + scnprintf(msg, sizeof(msg), "%d", count); + dbg_print(ep_num, "DONE", status, msg); +} + +/** + * dbg_event: prints a generic event + * @addr: endpoint address + * @name: event name + * @status: status + */ +void dbg_event(u8 ep_num, const char *name, int status) +{ + if (!allow_dbg_print(ep_num)) + return; + + if (name != NULL) + dbg_print(ep_num, name, status, ""); +} + +/* + * dbg_queue: prints a QUEUE event + * @addr: endpoint address + * @req: USB request + * @status: status + */ +void dbg_queue(u8 ep_num, const struct usb_request *req, int status) +{ + char msg[DBG_DATA_MSG]; + + if (!allow_dbg_print(ep_num)) + return; + + if (req != NULL) { + scnprintf(msg, sizeof(msg), + "%d %d", !req->no_interrupt, req->length); + dbg_print(ep_num, "QUEUE", status, msg); + } +} + +/** + * dbg_setup: prints a SETUP event + * @addr: endpoint address + * @req: setup request + */ +void dbg_setup(u8 ep_num, const struct usb_ctrlrequest *req) +{ + char msg[DBG_DATA_MSG]; + + if (!allow_dbg_print(ep_num)) + return; + + if (req != NULL) { + scnprintf(msg, sizeof(msg), + "%02X %02X %04X %04X %d", req->bRequestType, + req->bRequest, le16_to_cpu(req->wValue), + le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength)); + dbg_print(ep_num, "SETUP", 0, msg); + } +} + +/** + * dbg_print_reg: prints a reg value + * @name: reg name + * @reg: reg value to be printed + */ +void dbg_print_reg(const char *name, int reg) +{ + unsigned long flags; + + write_lock_irqsave(&dbg_dwc3_data.lck, flags); + + scnprintf(dbg_dwc3_data.buf[dbg_dwc3_data.idx], DBG_DATA_MSG, + "%s = 0x%08x\n", name, reg); + + dbg_inc(&dbg_dwc3_data.idx); + + write_unlock_irqrestore(&dbg_dwc3_data.lck, flags); + + if (dbg_dwc3_data.tty != 0) + pr_notice("%s = 0x%08x\n", name, reg); +} + +/** + * store_events: configure if events are going to be also printed to console + * + */ +static ssize_t dwc3_store_events(struct file *file, + const char __user *buf, size_t count, loff_t *ppos) +{ + int ret; + u8 tty; + + if (buf == NULL) { + pr_err("[%s] EINVAL\n", __func__); + ret = -EINVAL; + return ret; + } + + ret = kstrtou8_from_user(buf, count, 0, &tty); + if (ret < 0) { + pr_err("can't get enter value.\n"); + return ret; + } + + if (tty > 1) { + pr_err("<1|0>: enable|disable console log\n"); + ret = -EINVAL; + return ret; + } + + dbg_dwc3_data.tty = tty; + pr_info("tty = %u", dbg_dwc3_data.tty); + + return count; +} + +static int dwc3_gadget_data_events_show(struct seq_file *s, void *unused) +{ + unsigned long flags; + unsigned i; + + read_lock_irqsave(&dbg_dwc3_data.lck, flags); + + i = dbg_dwc3_data.idx; + if (strnlen(dbg_dwc3_data.buf[i], DBG_DATA_MSG)) + seq_printf(s, "%s\n", dbg_dwc3_data.buf[i]); + for (dbg_inc(&i); i != dbg_dwc3_data.idx; dbg_inc(&i)) { + if (!strnlen(dbg_dwc3_data.buf[i], DBG_DATA_MSG)) + continue; + seq_printf(s, "%s\n", dbg_dwc3_data.buf[i]); + } + + read_unlock_irqrestore(&dbg_dwc3_data.lck, flags); + + return 0; +} + +static int dwc3_gadget_data_events_open(struct inode *inode, struct file *f) +{ + return single_open(f, dwc3_gadget_data_events_show, inode->i_private); +} + +const struct file_operations dwc3_gadget_dbg_data_fops = { + .open = dwc3_gadget_data_events_open, + .read = seq_read, + .write = dwc3_store_events, + .llseek = seq_lseek, + .release = single_release, +}; + +static ssize_t dwc3_store_int_events(struct file *file, + const char __user *ubuf, size_t count, loff_t *ppos) +{ + int i, ret; + unsigned long flags; + struct seq_file *s = file->private_data; + struct dwc3 *dwc = s->private; + struct dwc3_ep *dep; + struct timespec ts; + u8 clear_stats; + + if (ubuf == NULL) { + pr_err("[%s] EINVAL\n", __func__); + ret = -EINVAL; + return ret; + } + + ret = kstrtou8_from_user(ubuf, count, 0, &clear_stats); + if (ret < 0) { + pr_err("can't get enter value.\n"); + return ret; + } + + if (clear_stats != 0) { + pr_err("Wrong value. To clear stats, enter value as 0.\n"); + ret = -EINVAL; + return ret; + } + + spin_lock_irqsave(&dwc->lock, flags); + + pr_debug("%s(): clearing debug interrupt buffers\n", __func__); + ts = current_kernel_time(); + for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { + dep = dwc->eps[i]; + memset(&dep->dbg_ep_events, 0, sizeof(dep->dbg_ep_events)); + memset(&dep->dbg_ep_events_diff, 0, sizeof(dep->dbg_ep_events)); + dep->dbg_ep_events_ts = ts; + } + memset(&dwc->dbg_gadget_events, 0, sizeof(dwc->dbg_gadget_events)); + + spin_unlock_irqrestore(&dwc->lock, flags); + + return count; +} + +static int dwc3_gadget_int_events_show(struct seq_file *s, void *unused) +{ + unsigned long flags; + struct dwc3 *dwc = s->private; + struct dwc3_gadget_events *dbg_gadget_events; + struct dwc3_ep *dep; + int i; + struct timespec ts_delta; + struct timespec ts_current; + u32 ts_delta_ms; + + spin_lock_irqsave(&dwc->lock, flags); + dbg_gadget_events = &dwc->dbg_gadget_events; + + for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) { + dep = dwc->eps[i]; + + if (dep == NULL || !(dep->flags & DWC3_EP_ENABLED)) + continue; + + ts_current = current_kernel_time(); + ts_delta = timespec_sub(ts_current, dep->dbg_ep_events_ts); + ts_delta_ms = ts_delta.tv_nsec / NSEC_PER_MSEC + + ts_delta.tv_sec * MSEC_PER_SEC; + + seq_printf(s, "\n\n===== dbg_ep_events for EP(%d) %s =====\n", + i, dep->name); + seq_printf(s, "xfercomplete:%u @ %luHz\n", + dep->dbg_ep_events.xfercomplete, + ep_event_rate(xfercomplete, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "xfernotready:%u @ %luHz\n", + dep->dbg_ep_events.xfernotready, + ep_event_rate(xfernotready, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "control_data:%u @ %luHz\n", + dep->dbg_ep_events.control_data, + ep_event_rate(control_data, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "control_status:%u @ %luHz\n", + dep->dbg_ep_events.control_status, + ep_event_rate(control_status, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "xferinprogress:%u @ %luHz\n", + dep->dbg_ep_events.xferinprogress, + ep_event_rate(xferinprogress, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "rxtxfifoevent:%u @ %luHz\n", + dep->dbg_ep_events.rxtxfifoevent, + ep_event_rate(rxtxfifoevent, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "streamevent:%u @ %luHz\n", + dep->dbg_ep_events.streamevent, + ep_event_rate(streamevent, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "epcmdcomplt:%u @ %luHz\n", + dep->dbg_ep_events.epcmdcomplete, + ep_event_rate(epcmdcomplete, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "cmdcmplt:%u @ %luHz\n", + dep->dbg_ep_events.cmdcmplt, + ep_event_rate(cmdcmplt, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "unknown:%u @ %luHz\n", + dep->dbg_ep_events.unknown_event, + ep_event_rate(unknown_event, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + seq_printf(s, "total:%u @ %luHz\n", + dep->dbg_ep_events.total, + ep_event_rate(total, dep->dbg_ep_events, + dep->dbg_ep_events_diff, ts_delta_ms)); + + dep->dbg_ep_events_ts = ts_current; + dep->dbg_ep_events_diff = dep->dbg_ep_events; + } + + seq_puts(s, "\n=== dbg_gadget events ==\n"); + seq_printf(s, "disconnect:%u\n reset:%u\n", + dbg_gadget_events->disconnect, dbg_gadget_events->reset); + seq_printf(s, "connect:%u\n wakeup:%u\n", + dbg_gadget_events->connect, dbg_gadget_events->wakeup); + seq_printf(s, "link_status_change:%u\n eopf:%u\n", + dbg_gadget_events->link_status_change, dbg_gadget_events->eopf); + seq_printf(s, "sof:%u\n suspend:%u\n", + dbg_gadget_events->sof, dbg_gadget_events->suspend); + seq_printf(s, "erratic_error:%u\n overflow:%u\n", + dbg_gadget_events->erratic_error, + dbg_gadget_events->overflow); + seq_printf(s, "vendor_dev_test_lmp:%u\n cmdcmplt:%u\n", + dbg_gadget_events->vendor_dev_test_lmp, + dbg_gadget_events->cmdcmplt); + seq_printf(s, "unknown_event:%u\n", dbg_gadget_events->unknown_event); + + seq_printf(s, "\n\t== Last %d interrupts stats ==\t\n", MAX_INTR_STATS); + seq_puts(s, "@ time (us):\t"); + for (i = 0; i < MAX_INTR_STATS; i++) + seq_printf(s, "%lld\t", ktime_to_us(dwc->irq_start_time[i])); + seq_puts(s, "\nhard irq time (us):\t"); + for (i = 0; i < MAX_INTR_STATS; i++) + seq_printf(s, "%d\t", dwc->irq_completion_time[i]); + seq_puts(s, "\nevents count:\t\t"); + for (i = 0; i < MAX_INTR_STATS; i++) + seq_printf(s, "%d\t", dwc->irq_event_count[i]); + seq_puts(s, "\nbh handled count:\t"); + for (i = 0; i < MAX_INTR_STATS; i++) + seq_printf(s, "%d\t", dwc->bh_handled_evt_cnt[i]); + seq_puts(s, "\nirq thread time (us):\t"); + for (i = 0; i < MAX_INTR_STATS; i++) + seq_printf(s, "%d\t", dwc->bh_completion_time[i]); + seq_putc(s, '\n'); + + seq_printf(s, "t_pwr evt irq : %lld\n", + ktime_to_us(dwc->t_pwr_evt_irq)); + + seq_printf(s, "l1_remote_wakeup_cnt : %lu\n", + dwc->l1_remote_wakeup_cnt); + + spin_unlock_irqrestore(&dwc->lock, flags); + return 0; +} + +static int dwc3_gadget_events_open(struct inode *inode, struct file *f) +{ + return single_open(f, dwc3_gadget_int_events_show, inode->i_private); +} + +const struct file_operations dwc3_gadget_dbg_events_fops = { + .open = dwc3_gadget_events_open, + .read = seq_read, + .write = dwc3_store_int_events, + .llseek = seq_lseek, + .release = single_release, +}; + +int dwc3_debugfs_init(struct dwc3 *dwc) +{ + struct dentry *root; + struct dentry *file; + int ret; + + root = debugfs_create_dir(dev_name(dwc->dev), NULL); + if (!root) { + ret = -ENOMEM; + goto err0; + } + + dwc->root = root; + + dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL); + if (!dwc->regset) { + ret = -ENOMEM; + goto err1; + } + + dwc->regset->regs = dwc3_regs; + dwc->regset->nregs = ARRAY_SIZE(dwc3_regs); + dwc->regset->base = dwc->regs; + + if (dwc->create_reg_debugfs) { + file = debugfs_create_regset32("regdump", 0444, + root, dwc->regset); + if (!file) { + dev_dbg(dwc->dev, "Can't create debugfs regdump\n"); + ret = -ENOMEM; + goto err1; + } + } + + if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) { + file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_mode_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + } + + if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) || + IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { + file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_testmode_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("link_state", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_link_state_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + } + + file = debugfs_create_file("trbs", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_ep_trb_list_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("requests", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_ep_req_list_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("queued_reqs", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_ep_req_queued_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("events", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_gadget_dbg_data_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + file = debugfs_create_file("int_events", S_IRUGO | S_IWUSR, root, + dwc, &dwc3_gadget_dbg_events_fops); + if (!file) { + ret = -ENOMEM; + goto err1; + } + + return 0; + +err1: + debugfs_remove_recursive(root); + +err0: + return ret; +} + +void dwc3_debugfs_exit(struct dwc3 *dwc) +{ + debugfs_remove_recursive(dwc->root); + dwc->root = NULL; +} |