// SPDX-License-Identifier: GPL-2.0
/*
* mtu3_debugfs.c - debugfs interface
*
* Copyright (C) 2019 MediaTek Inc.
*
* Author: Chunfeng Yun <[email protected]>
*/
#include <linux/uaccess.h>
#include "mtu3.h"
#include "mtu3_dr.h"
#include "mtu3_debug.h"
#define dump_register(nm) \
{ \
.name = __stringify(nm), \
.offset = U3D_ ##nm, \
}
#define dump_prb_reg(nm, os) \
{ \
.name = nm, \
.offset = os, \
}
static const struct debugfs_reg32 mtu3_ippc_regs[] = {
dump_register(SSUSB_IP_PW_CTRL0),
dump_register(SSUSB_IP_PW_CTRL1),
dump_register(SSUSB_IP_PW_CTRL2),
dump_register(SSUSB_IP_PW_CTRL3),
dump_register(SSUSB_IP_PW_STS1),
dump_register(SSUSB_OTG_STS),
dump_register(SSUSB_IP_XHCI_CAP),
dump_register(SSUSB_IP_DEV_CAP),
dump_register(SSUSB_U3_CTRL_0P),
dump_register(SSUSB_U2_CTRL_0P),
dump_register(SSUSB_HW_ID),
dump_register(SSUSB_HW_SUB_ID),
dump_register(SSUSB_IP_SPARE0),
};
static const struct debugfs_reg32 mtu3_dev_regs[] = {
dump_register(LV1ISR),
dump_register(LV1IER),
dump_register(EPISR),
dump_register(EPIER),
dump_register(EP0CSR),
dump_register(RXCOUNT0),
dump_register(QISAR0),
dump_register(QIER0),
dump_register(QISAR1),
dump_register(QIER1),
dump_register(CAP_EPNTXFFSZ),
dump_register(CAP_EPNRXFFSZ),
dump_register(CAP_EPINFO),
dump_register(MISC_CTRL),
};
static const struct debugfs_reg32 mtu3_csr_regs[] = {
dump_register(DEVICE_CONF),
dump_register(DEV_LINK_INTR_ENABLE),
dump_register(DEV_LINK_INTR),
dump_register(LTSSM_CTRL),
dump_register(USB3_CONFIG),
dump_register(LINK_STATE_MACHINE),
dump_register(LTSSM_INTR_ENABLE),
dump_register(LTSSM_INTR),
dump_register(U3U2_SWITCH_CTRL),
dump_register(POWER_MANAGEMENT),
dump_register(DEVICE_CONTROL),
dump_register(COMMON_USB_INTR_ENABLE),
dump_register(COMMON_USB_INTR),
dump_register(USB20_MISC_CONTROL),
dump_register(USB20_OPSTATE),
};
static int mtu3_link_state_show(struct seq_file *sf, void *unused)
{
struct mtu3 *mtu = sf->private;
void __iomem *mbase = mtu->mac_base;
seq_printf(sf, "opstate: %#x, ltssm: %#x\n",
mtu3_readl(mbase, U3D_USB20_OPSTATE),
LTSSM_STATE(mtu3_readl(mbase, U3D_LINK_STATE_MACHINE)));
return 0;
}
static int mtu3_ep_used_show(struct seq_file *sf, void *unused)
{
struct mtu3 *mtu = sf->private;
struct mtu3_ep *mep;
unsigned long flags;
int used = 0;
int i;
spin_lock_irqsave(&mtu->lock, flags);
for (i = 0; i < mtu->num_eps; i++) {
mep = mtu->in_eps + i;
if (mep->flags & MTU3_EP_ENABLED) {
seq_printf(sf, "%s - type: %s\n", mep->name, usb_ep_type_string(mep->type));
used++;
}
mep = mtu->out_eps + i;
if (mep->flags & MTU3_EP_ENABLED) {
seq_printf(sf, "%s - type: %s\n", mep->name, usb_ep_type_string(mep->type));
used++;
}
}
seq_printf(sf, "total used: %d eps\n", used);
spin_unlock_irqrestore(&mtu->lock, flags);
return 0;
}
DEFINE_SHOW_ATTRIBUTE(mtu3_link_state);
DEFINE_SHOW_ATTRIBUTE(mtu3_ep_used);
static void mtu3_debugfs_regset(struct mtu3 *mtu, void __iomem *base,
const struct debugfs_reg32 *regs, size_t nregs,
const char *name, struct dentry *parent)
{
struct debugfs_regset32 *regset;
struct mtu3_regset *mregs;
mregs = devm_kzalloc(mtu->dev, sizeof(*mregs), GFP_KERNEL);
if (!mregs)
return;
sprintf(mregs->name, "%s", name);
regset = &mregs->regset;
regset->regs = regs;
regset->nregs = nregs;
regset->base = base;
debugfs_create_regset32(mregs->name, 0444, parent, regset);
}
static void mtu3_debugfs_ep_regset(struct mtu3 *mtu, struct mtu3_ep *mep,
struct dentry *parent)
{
struct debugfs_reg32 *regs;
int epnum = mep->epnum;
int in = mep->is_in;
regs = devm_kcalloc(mtu->dev, 7, sizeof(*regs), GFP_KERNEL);
if (!regs)
return;
regs[0].name = in ? "TCR0" : "RCR0";
regs[0].offset = in ? MU3D_EP_TXCR0(epnum) : MU3D_EP_RXCR0(epnum);
regs[1].name = in ? "TCR1" : "RCR1";
regs[1].offset = in ? MU3D_EP_TXCR1(epnum) : MU3D_EP_RXCR1(epnum);
regs[2].name = in ? "TCR2" : "RCR2";
regs[2].offset = in ? MU3D_EP_TXCR2(epnum) : MU3D_EP_RXCR2(epnum);
regs[3].name = in ? "TQHIAR" : "RQHIAR";
regs[3].offset = in ? USB_QMU_TQHIAR(epnum) : USB_QMU_RQHIAR(epnum);
regs[4].name = in ? "TQCSR" : "RQCSR";
regs[4].offset = in ? USB_QMU_TQCSR(epnum) : USB_QMU_RQCSR(epnum);
regs[5].name = in ? "TQSAR" : "RQSAR";
regs[5].offset = in ? USB_QMU_TQSAR(epnum) : USB_QMU_RQSAR(epnum);
regs[6].name = in ? "TQCPR" : "RQCPR";
regs[6].offset = in ? USB_QMU_TQCPR(epnum) : USB_QMU_RQCPR(epnum);
mtu3_debugfs_regset(mtu, mtu->mac_base, regs, 7, "ep-regs", parent);
}
static int mtu3_ep_info_show(struct seq_file *sf, void *unused)
{
struct mtu3_ep *mep = sf->private;
struct mtu3 *mtu = mep->mtu;
unsigned long flags;
spin_lock_irqsave(&mtu->lock, flags);
seq_printf(sf, "ep - type:%s, maxp:%d, slot:%d, flags:%x\n",
usb_ep_type_string(mep->type), mep->maxp, mep->slot, mep->flags);
spin_unlock_irqrestore(&mtu->lock, flags);
return 0;
}
static int mtu3_fifo_show(struct seq_file *sf, void *unused)
{
struct mtu3_ep *mep = sf->private;
struct mtu3 *mtu = mep->mtu;
unsigned long flags;
spin_lock_irqsave(&mtu->lock, flags);
seq_printf(sf, "fifo - seg_size:%d, addr:%d, size:%d\n",
mep->fifo_seg_size, mep->fifo_addr, mep->fifo_size);
spin_unlock_irqrestore(&mtu->lock, flags);
return 0;
}
static int mtu3_qmu_ring_show(struct seq_file *sf, void *unused)
{
struct mtu3_ep *mep = sf->private;
struct mtu3 *mtu = mep->mtu;
struct mtu3_gpd_ring *ring;
unsigned long flags;
ring = &mep->gpd_ring;
spin_lock_irqsave(&mtu->lock, flags);
seq_printf(sf,
"qmu-ring - dma:%pad, start:%p, end:%p, enq:%p, dep:%p\n",
&ring->dma, ring->start, ring->end,
ring->enqueue, ring->dequeue);
spin_unlock_irqrestore(&mtu->lock, flags);
return 0;
}
static int mtu3_qmu_gpd_show(struct seq_file *sf, void *unused)
{
struct mtu3_ep *mep = sf->private;
struct mtu3 *mtu = mep->mtu;
struct mtu3_gpd_ring *ring;
struct qmu_gpd *gpd;
dma_addr_t dma;
unsigned long flags;
int i;
spin_lock_irqsave(&mtu->lock, flags);
ring = &mep->gpd_ring;
gpd = ring->start;
if (!gpd || !(mep->flags & MTU3_EP_ENABLED)) {
seq_puts(sf, "empty!\n");
goto out;
}
for (i = 0; i < MAX_GPD_NUM; i++, gpd++) {
dma = ring->dma + i * sizeof(*gpd);
seq_printf(sf, "gpd.%03d -> %pad, %p: %08x %08x %08x %08x\n",
i, &dma, gpd, gpd->dw0_info, gpd->next_gpd,
gpd->buffer, gpd->dw3_info);
}
out:
spin_unlock_irqrestore(&mtu->lock, flags);
return 0;
}
static const struct mtu3_file_map mtu3_ep_files[] = {
{"ep-info", mtu3_ep_info_show, },
{"fifo", mtu3_fifo_show, },
{"qmu-ring", mtu3_qmu_ring_show, },
{"qmu-gpd", mtu3_qmu_gpd_show, },
};
static int mtu3_ep_open(struct inode *inode, struct file *file)
{
const char *file_name = file_dentry(file)->d_iname;
const struct mtu3_file_map *f_map;
int i;
for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
f_map = &mtu3_ep_files[i];
if (strcmp(f_map->name, file_name) == 0)
break;
}
return single_open(file, f_map->show, inode->i_private);
}
static const struct file_operations mtu3_ep_fops = {
.open = mtu3_ep_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static const struct debugfs_reg32 mtu3_prb_regs[] = {
dump_prb_reg("enable", U3D_SSUSB_PRB_CTRL0),
dump_prb_reg("byte-sell", U3D_SSUSB_PRB_CTRL1),
dump_prb_reg("byte-selh", U3D_SSUSB_PRB_CTRL2),
dump_prb_reg("module-sel", U3D_SSUSB_PRB_CTRL3),
dump_prb_reg("sw-out", U3D_SSUSB_PRB_CTRL4),
dump_prb_reg("data", U3D_SSUSB_PRB_CTRL5),
};
static int mtu3_probe_show(struct seq_file *sf, void *unused)
{
const char *file_name = file_dentry(sf->file)->d_iname;
struct mtu3 *mtu = sf->private;
const struct debugfs_reg32 *regs;
int i;
for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
regs = &mtu3_prb_regs[i];
if (strcmp(regs->name, file_name) == 0)
break;
}
seq_printf(sf, "0x%04x - 0x%08x\n", (u32)regs->offset,
mtu3_readl(mtu->ippc_base, (u32)regs->offset));
return 0;
}
static int mtu3_probe_open(struct inode *inode, struct file *file)
{
return single_open(file, mtu3_probe_show, inode->i_private);
}
static ssize_t mtu3_probe_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
const char *file_name = file_dentry(file)->d_iname;
struct seq_file *sf = file->private_data;
struct mtu3 *mtu = sf->private;
const struct debugfs_reg32 *regs;
char buf[32];
u32 val;
int i;
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (kstrtou32(buf, 0, &val))
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
regs = &mtu3_prb_regs[i];
if (strcmp(regs->name, file_name) == 0)
break;
}
mtu3_writel(mtu->ippc_base, (u32)regs->offset, val);
return count;
}
static const struct file_operations mtu3_probe_fops = {
.open = mtu3_probe_open,
.write = mtu3_probe_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static void mtu3_debugfs_create_prb_files(struct mtu3 *mtu)
{
struct ssusb_mtk *ssusb = mtu->ssusb;
const struct debugfs_reg32 *regs;
struct dentry *dir_prb;
int i;
dir_prb = debugfs_create_dir("probe", ssusb->dbgfs_root);
for (i = 0; i < ARRAY_SIZE(mtu3_prb_regs); i++) {
regs = &mtu3_prb_regs[i];
debugfs_create_file(regs->name, 0644, dir_prb,
mtu, &mtu3_probe_fops);
}
mtu3_debugfs_regset(mtu, mtu->ippc_base, mtu3_prb_regs,
ARRAY_SIZE(mtu3_prb_regs), "regs", dir_prb);
}
static void mtu3_debugfs_create_ep_dir(struct mtu3_ep *mep,
struct dentry *parent)
{
const struct mtu3_file_map *files;
struct dentry *dir_ep;
int i;
dir_ep = debugfs_create_dir(mep->name, parent);
mtu3_debugfs_ep_regset(mep->mtu, mep, dir_ep);
for (i = 0; i < ARRAY_SIZE(mtu3_ep_files); i++) {
files = &mtu3_ep_files[i];
debugfs_create_file(files->name, 0444, dir_ep,
mep, &mtu3_ep_fops);
}
}
static void mtu3_debugfs_create_ep_dirs(struct mtu3 *mtu)
{
struct ssusb_mtk *ssusb = mtu->ssusb;
struct dentry *dir_eps;
int i;
dir_eps = debugfs_create_dir("eps", ssusb->dbgfs_root);
for (i = 1; i < mtu->num_eps; i++) {
mtu3_debugfs_create_ep_dir(mtu->in_eps + i, dir_eps);
mtu3_debugfs_create_ep_dir(mtu->out_eps + i, dir_eps);
}
}
void ssusb_dev_debugfs_init(struct ssusb_mtk *ssusb)
{
struct mtu3 *mtu = ssusb->u3d;
struct dentry *dir_regs;
dir_regs = debugfs_create_dir("regs", ssusb->dbgfs_root);
mtu3_debugfs_regset(mtu, mtu->ippc_base,
mtu3_ippc_regs, ARRAY_SIZE(mtu3_ippc_regs),
"reg-ippc", dir_regs);
mtu3_debugfs_regset(mtu, mtu->mac_base,
mtu3_dev_regs, ARRAY_SIZE(mtu3_dev_regs),
"reg-dev", dir_regs);
mtu3_debugfs_regset(mtu, mtu->mac_base,
mtu3_csr_regs, ARRAY_SIZE(mtu3_csr_regs),
"reg-csr", dir_regs);
mtu3_debugfs_create_ep_dirs(mtu);
mtu3_debugfs_create_prb_files(mtu);
debugfs_create_file("link-state", 0444, ssusb->dbgfs_root,
mtu, &mtu3_link_state_fops);
debugfs_create_file("ep-used", 0444, ssusb->dbgfs_root,
mtu, &mtu3_ep_used_fops);
}
static int ssusb_mode_show(struct seq_file *sf, void *unused)
{
struct ssusb_mtk *ssusb = sf->private;
seq_printf(sf, "current mode: %s(%s drd)\n(echo device/host)\n",
ssusb->is_host ? "host" : "device",
ssusb->otg_switch.manual_drd_enabled ? "manual" : "auto");
return 0;
}
static int ssusb_mode_open(struct inode *inode, struct file *file)
{
return single_open(file, ssusb_mode_show, inode->i_private);
}
static ssize_t ssusb_mode_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *sf = file->private_data;
struct ssusb_mtk *ssusb = sf->private;
char buf[16];
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (!strncmp(buf, "host", 4) && !ssusb->is_host) {
ssusb_mode_switch(ssusb, 1);
} else if (!strncmp(buf, "device", 6) && ssusb->is_host) {
ssusb_mode_switch(ssusb, 0);
} else {
dev_err(ssusb->dev, "wrong or duplicated setting\n");
return -EINVAL;
}
return count;
}
static const struct file_operations ssusb_mode_fops = {
.open = ssusb_mode_open,
.write = ssusb_mode_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ssusb_vbus_show(struct seq_file *sf, void *unused)
{
struct ssusb_mtk *ssusb = sf->private;
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
seq_printf(sf, "vbus state: %s\n(echo on/off)\n",
regulator_is_enabled(otg_sx->vbus) ? "on" : "off");
return 0;
}
static int ssusb_vbus_open(struct inode *inode, struct file *file)
{
return single_open(file, ssusb_vbus_show, inode->i_private);
}
static ssize_t ssusb_vbus_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *sf = file->private_data;
struct ssusb_mtk *ssusb = sf->private;
struct otg_switch_mtk *otg_sx = &ssusb->otg_switch;
char buf[16];
bool enable;
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (kstrtobool(buf, &enable)) {
dev_err(ssusb->dev, "wrong setting\n");
return -EINVAL;
}
ssusb_set_vbus(otg_sx, enable);
return count;
}
static const struct file_operations ssusb_vbus_fops = {
.open = ssusb_vbus_open,
.write = ssusb_vbus_write,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
void ssusb_dr_debugfs_init(struct ssusb_mtk *ssusb)
{
struct dentry *root = ssusb->dbgfs_root;
debugfs_create_file("mode", 0644, root, ssusb, &ssusb_mode_fops);
debugfs_create_file("vbus", 0644, root, ssusb, &ssusb_vbus_fops);
}
void ssusb_debugfs_create_root(struct ssusb_mtk *ssusb)
{
ssusb->dbgfs_root =
debugfs_create_dir(dev_name(ssusb->dev), usb_debug_root);
}
void ssusb_debugfs_remove_root(struct ssusb_mtk *ssusb)
{
debugfs_remove_recursive(ssusb->dbgfs_root);
ssusb->dbgfs_root = NULL;
}
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