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linux/drivers/usb/dwc3/debugfs.c
Udipto Goswami 614ce6a2ea usb: dwc3: debugfs: Resume dwc3 before accessing registers 
When the dwc3 device is runtime suspended, various required clocks are in
disabled state and it is not guaranteed that access to any registers would
work. Depending on the SoC glue, a register read could be as benign as
returning 0 or be fatal enough to hang the system.

In order to prevent such scenarios of fatal errors, make sure to resume
dwc3 then allow the function to proceed.

Fixes: 72246da40f ("usb: Introduce DesignWare USB3 DRD Driver")
Cc: stable@vger.kernel.org #3.2: 30332eeefe: debugfs: regset32: Add Runtime PM support
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230509144836.6803-1-quic_ugoswami@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-05-13 17:56:22 +09:00

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// SPDX-License-Identifier: GPL-2.0
/*
* debugfs.c - DesignWare USB3 DRD Controller DebugFS file
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*/
#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 DWC3_LSP_MUX_UNSELECTED 0xfffff
#define dump_register(nm) \
{ \
.name = __stringify(nm), \
.offset = DWC3_ ##nm, \
}
#define dump_ep_register_set(n) \
{ \
.name = "DEPCMDPAR2("__stringify(n)")", \
.offset = DWC3_DEP_BASE(n) + \
DWC3_DEPCMDPAR2, \
}, \
{ \
.name = "DEPCMDPAR1("__stringify(n)")", \
.offset = DWC3_DEP_BASE(n) + \
DWC3_DEPCMDPAR1, \
}, \
{ \
.name = "DEPCMDPAR0("__stringify(n)")", \
.offset = DWC3_DEP_BASE(n) + \
DWC3_DEPCMDPAR0, \
}, \
{ \
.name = "DEPCMD("__stringify(n)")", \
.offset = DWC3_DEP_BASE(n) + \
DWC3_DEPCMD, \
}
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(GUCTL1),
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(GDBGBMU),
dump_register(GPRTBIMAP_HS0),
dump_register(GPRTBIMAP_HS1),
dump_register(GPRTBIMAP_FS0),
dump_register(GPRTBIMAP_FS1),
dump_register(GUCTL2),
dump_register(VER_NUMBER),
dump_register(VER_TYPE),
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(GUCTL3),
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_ep_register_set(0),
dump_ep_register_set(1),
dump_ep_register_set(2),
dump_ep_register_set(3),
dump_ep_register_set(4),
dump_ep_register_set(5),
dump_ep_register_set(6),
dump_ep_register_set(7),
dump_ep_register_set(8),
dump_ep_register_set(9),
dump_ep_register_set(10),
dump_ep_register_set(11),
dump_ep_register_set(12),
dump_ep_register_set(13),
dump_ep_register_set(14),
dump_ep_register_set(15),
dump_ep_register_set(16),
dump_ep_register_set(17),
dump_ep_register_set(18),
dump_ep_register_set(19),
dump_ep_register_set(20),
dump_ep_register_set(21),
dump_ep_register_set(22),
dump_ep_register_set(23),
dump_ep_register_set(24),
dump_ep_register_set(25),
dump_ep_register_set(26),
dump_ep_register_set(27),
dump_ep_register_set(28),
dump_ep_register_set(29),
dump_ep_register_set(30),
dump_ep_register_set(31),
dump_register(OCFG),
dump_register(OCTL),
dump_register(OEVT),
dump_register(OEVTEN),
dump_register(OSTS),
};
static void dwc3_host_lsp(struct seq_file *s)
{
struct dwc3 *dwc = s->private;
bool dbc_enabled;
u32 sel;
u32 reg;
u32 val;
dbc_enabled = !!(dwc->hwparams.hwparams1 & DWC3_GHWPARAMS1_ENDBC);
sel = dwc->dbg_lsp_select;
if (sel == DWC3_LSP_MUX_UNSELECTED) {
seq_puts(s, "Write LSP selection to print for host\n");
return;
}
reg = DWC3_GDBGLSPMUX_HOSTSELECT(sel);
dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", sel, val);
if (dbc_enabled && sel < 256) {
reg |= DWC3_GDBGLSPMUX_ENDBC;
dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
val = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
seq_printf(s, "GDBGLSP_DBC[%d] = 0x%08x\n", sel, val);
}
}
static void dwc3_gadget_lsp(struct seq_file *s)
{
struct dwc3 *dwc = s->private;
int i;
u32 reg;
for (i = 0; i < 16; i++) {
reg = DWC3_GDBGLSPMUX_DEVSELECT(i);
dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
reg = dwc3_readl(dwc->regs, DWC3_GDBGLSP);
seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", i, reg);
}
}
static int dwc3_lsp_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
unsigned int current_mode;
unsigned long flags;
u32 reg;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
reg = dwc3_readl(dwc->regs, DWC3_GSTS);
current_mode = DWC3_GSTS_CURMOD(reg);
switch (current_mode) {
case DWC3_GSTS_CURMOD_HOST:
dwc3_host_lsp(s);
break;
case DWC3_GSTS_CURMOD_DEVICE:
dwc3_gadget_lsp(s);
break;
default:
seq_puts(s, "Mode is unknown, no LSP register printed\n");
break;
}
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_lsp_open(struct inode *inode, struct file *file)
{
return single_open(file, dwc3_lsp_show, inode->i_private);
}
static ssize_t dwc3_lsp_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;
char buf[32] = { 0 };
u32 sel;
int ret;
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
ret = kstrtouint(buf, 0, &sel);
if (ret)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
dwc->dbg_lsp_select = sel;
spin_unlock_irqrestore(&dwc->lock, flags);
return count;
}
static const struct file_operations dwc3_lsp_fops = {
.open = dwc3_lsp_open,
.write = dwc3_lsp_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int dwc3_mode_show(struct seq_file *s, void *unused)
{
struct dwc3 *dwc = s->private;
unsigned long flags;
u32 reg;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
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_puts(s, "host\n");
break;
case DWC3_GCTL_PRTCAP_DEVICE:
seq_puts(s, "device\n");
break;
case DWC3_GCTL_PRTCAP_OTG:
seq_puts(s, "otg\n");
break;
default:
seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
}
pm_runtime_put_sync(dwc->dev);
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;
u32 mode = 0;
char buf[32];
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (dwc->dr_mode != USB_DR_MODE_OTG)
return count;
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;
dwc3_set_mode(dwc, mode);
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;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
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_puts(s, "no test\n");
break;
case USB_TEST_J:
seq_puts(s, "test_j\n");
break;
case USB_TEST_K:
seq_puts(s, "test_k\n");
break;
case USB_TEST_SE0_NAK:
seq_puts(s, "test_se0_nak\n");
break;
case USB_TEST_PACKET:
seq_puts(s, "test_packet\n");
break;
case USB_TEST_FORCE_ENABLE:
seq_puts(s, "test_force_enable\n");
break;
default:
seq_printf(s, "UNKNOWN %d\n", reg);
}
pm_runtime_put_sync(dwc->dev);
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];
int ret;
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (!strncmp(buf, "test_j", 6))
testmode = USB_TEST_J;
else if (!strncmp(buf, "test_k", 6))
testmode = USB_TEST_K;
else if (!strncmp(buf, "test_se0_nak", 12))
testmode = USB_TEST_SE0_NAK;
else if (!strncmp(buf, "test_packet", 11))
testmode = USB_TEST_PACKET;
else if (!strncmp(buf, "test_force_enable", 17))
testmode = USB_TEST_FORCE_ENABLE;
else
testmode = 0;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_set_test_mode(dwc, testmode);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
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;
u8 speed;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
reg = dwc3_readl(dwc->regs, DWC3_GSTS);
if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
seq_puts(s, "Not available\n");
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
state = DWC3_DSTS_USBLNKST(reg);
speed = reg & DWC3_DSTS_CONNECTSPD;
seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ?
dwc3_gadget_link_string(state) :
dwc3_gadget_hs_link_string(state));
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
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];
u32 reg;
u8 speed;
int ret;
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;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
reg = dwc3_readl(dwc->regs, DWC3_GSTS);
if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) {
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return -EINVAL;
}
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
speed = reg & DWC3_DSTS_CONNECTSPD;
if (speed < DWC3_DSTS_SUPERSPEED &&
state != DWC3_LINK_STATE_RECOV) {
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return -EINVAL;
}
dwc3_gadget_set_link_state(dwc, state);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
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,
};
struct dwc3_ep_file_map {
const char name[25];
const struct file_operations *const fops;
};
static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 mdwidth;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_TXFIFO);
/* Convert to bytes */
mdwidth = dwc3_mdwidth(dwc);
val *= mdwidth;
val >>= 3;
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 mdwidth;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_RXFIFO);
/* Convert to bytes */
mdwidth = dwc3_mdwidth(dwc);
val *= mdwidth;
val >>= 3;
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_TXREQQ);
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_RXREQQ);
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ);
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ);
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_event_queue_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u32 val;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
val = dwc3_core_fifo_space(dep, DWC3_EVENTQ);
seq_printf(s, "%u\n", val);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_transfer_type_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
spin_lock_irqsave(&dwc->lock, flags);
if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) {
seq_puts(s, "--\n");
goto out;
}
switch (usb_endpoint_type(dep->endpoint.desc)) {
case USB_ENDPOINT_XFER_CONTROL:
seq_puts(s, "control\n");
break;
case USB_ENDPOINT_XFER_ISOC:
seq_puts(s, "isochronous\n");
break;
case USB_ENDPOINT_XFER_BULK:
seq_puts(s, "bulk\n");
break;
case USB_ENDPOINT_XFER_INT:
seq_puts(s, "interrupt\n");
break;
default:
seq_puts(s, "--\n");
}
out:
spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
}
static int dwc3_trb_ring_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
int i;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
if (dep->number <= 1) {
seq_puts(s, "--\n");
goto out;
}
seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n");
for (i = 0; i < DWC3_TRB_NUM; i++) {
struct dwc3_trb *trb = &dep->trb_pool[i];
unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl);
seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n",
trb->bph, trb->bpl, trb->size,
dwc3_trb_type_string(type),
!!(trb->ctrl & DWC3_TRB_CTRL_IOC),
!!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI),
!!(trb->ctrl & DWC3_TRB_CTRL_CSP),
!!(trb->ctrl & DWC3_TRB_CTRL_CHN),
!!(trb->ctrl & DWC3_TRB_CTRL_LST),
!!(trb->ctrl & DWC3_TRB_CTRL_HWO),
dep->trb_enqueue == i ? 'E' : ' ',
dep->trb_dequeue == i ? 'D' : ' ');
}
out:
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
static int dwc3_ep_info_register_show(struct seq_file *s, void *unused)
{
struct dwc3_ep *dep = s->private;
struct dwc3 *dwc = dep->dwc;
unsigned long flags;
u64 ep_info;
u32 lower_32_bits;
u32 upper_32_bits;
u32 reg;
int ret;
ret = pm_runtime_resume_and_get(dwc->dev);
if (ret < 0)
return ret;
spin_lock_irqsave(&dwc->lock, flags);
reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number);
dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg);
lower_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO0);
upper_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO1);
ep_info = ((u64)upper_32_bits << 32) | lower_32_bits;
seq_printf(s, "0x%016llx\n", ep_info);
spin_unlock_irqrestore(&dwc->lock, flags);
pm_runtime_put_sync(dwc->dev);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size);
DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size);
DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue);
DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue);
DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue);
DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue);
DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue);
DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type);
DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring);
DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register);
static const struct dwc3_ep_file_map dwc3_ep_file_map[] = {
{ "tx_fifo_size", &dwc3_tx_fifo_size_fops, },
{ "rx_fifo_size", &dwc3_rx_fifo_size_fops, },
{ "tx_request_queue", &dwc3_tx_request_queue_fops, },
{ "rx_request_queue", &dwc3_rx_request_queue_fops, },
{ "rx_info_queue", &dwc3_rx_info_queue_fops, },
{ "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, },
{ "event_queue", &dwc3_event_queue_fops, },
{ "transfer_type", &dwc3_transfer_type_fops, },
{ "trb_ring", &dwc3_trb_ring_fops, },
{ "GDBGEPINFO", &dwc3_ep_info_register_fops, },
};
void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep)
{
struct dentry *dir;
int i;
dir = debugfs_create_dir(dep->name, dep->dwc->debug_root);
for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) {
const struct file_operations *fops = dwc3_ep_file_map[i].fops;
const char *name = dwc3_ep_file_map[i].name;
debugfs_create_file(name, 0444, dir, dep, fops);
}
}
void dwc3_debugfs_remove_endpoint_dir(struct dwc3_ep *dep)
{
debugfs_lookup_and_remove(dep->name, dep->dwc->debug_root);
}
void dwc3_debugfs_init(struct dwc3 *dwc)
{
struct dentry *root;
dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL);
if (!dwc->regset)
return;
dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED;
dwc->regset->regs = dwc3_regs;
dwc->regset->nregs = ARRAY_SIZE(dwc3_regs);
dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START;
dwc->regset->dev = dwc->dev;
root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root);
dwc->debug_root = root;
debugfs_create_regset32("regdump", 0444, root, dwc->regset);
debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops);
if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE))
debugfs_create_file("mode", 0644, root, dwc,
&dwc3_mode_fops);
if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) ||
IS_ENABLED(CONFIG_USB_DWC3_GADGET)) {
debugfs_create_file("testmode", 0644, root, dwc,
&dwc3_testmode_fops);
debugfs_create_file("link_state", 0644, root, dwc,
&dwc3_link_state_fops);
}
}
void dwc3_debugfs_exit(struct dwc3 *dwc)
{
debugfs_lookup_and_remove(dev_name(dwc->dev), usb_debug_root);
kfree(dwc->regset);
}
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