Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/usb/mtu3/mtu3_debugfs.c b/drivers/usb/mtu3/mtu3_debugfs.c
new file mode 100644
index 0000000..c96e5da
--- /dev/null
+++ b/drivers/usb/mtu3/mtu3_debugfs.c
@@ -0,0 +1,539 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * mtu3_debugfs.c - debugfs interface
+ *
+ * Copyright (C) 2019 MediaTek Inc.
+ *
+ * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
+ */
+
+#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_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: %d\n", mep->name, mep->type);
+ used++;
+ }
+
+ mep = mtu->out_eps + i;
+ if (mep->flags & MTU3_EP_ENABLED) {
+ seq_printf(sf, "%s - type: %d\n", mep->name, 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(*regset), 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:%d, maxp:%d, slot:%d, flags:%x\n",
+ 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 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;
+ 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;
+}