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path: root/drivers/usb/host/uhci-debug.c
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Diffstat (limited to 'drivers/usb/host/uhci-debug.c')
-rw-r--r--drivers/usb/host/uhci-debug.c587
1 files changed, 587 insertions, 0 deletions
diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
new file mode 100644
index 0000000..24c73c5
--- /dev/null
+++ b/drivers/usb/host/uhci-debug.c
@@ -0,0 +1,587 @@
+/*
+ * UHCI-specific debugging code. Invaluable when something
+ * goes wrong, but don't get in my face.
+ *
+ * Kernel visible pointers are surrounded in []'s and bus
+ * visible pointers are surrounded in ()'s
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ * (C) Copyright 1999-2001 Johannes Erdfelt
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/smp_lock.h>
+#include <asm/io.h>
+
+#include "uhci-hcd.h"
+
+static struct dentry *uhci_debugfs_root = NULL;
+
+/* Handle REALLY large printk's so we don't overflow buffers */
+static inline void lprintk(char *buf)
+{
+ char *p;
+
+ /* Just write one line at a time */
+ while (buf) {
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+ printk(KERN_DEBUG "%s\n", buf);
+ buf = p;
+ if (buf)
+ buf++;
+ }
+}
+
+static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
+{
+ char *out = buf;
+ char *spid;
+ u32 status, token;
+
+ /* Try to make sure there's enough memory */
+ if (len < 160)
+ return 0;
+
+ status = td_status(td);
+ out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
+ out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
+ ((status >> 27) & 3),
+ (status & TD_CTRL_SPD) ? "SPD " : "",
+ (status & TD_CTRL_LS) ? "LS " : "",
+ (status & TD_CTRL_IOC) ? "IOC " : "",
+ (status & TD_CTRL_ACTIVE) ? "Active " : "",
+ (status & TD_CTRL_STALLED) ? "Stalled " : "",
+ (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "",
+ (status & TD_CTRL_BABBLE) ? "Babble " : "",
+ (status & TD_CTRL_NAK) ? "NAK " : "",
+ (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "",
+ (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
+ status & 0x7ff);
+
+ token = td_token(td);
+ switch (uhci_packetid(token)) {
+ case USB_PID_SETUP:
+ spid = "SETUP";
+ break;
+ case USB_PID_OUT:
+ spid = "OUT";
+ break;
+ case USB_PID_IN:
+ spid = "IN";
+ break;
+ default:
+ spid = "?";
+ break;
+ }
+
+ out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ",
+ token >> 21,
+ ((token >> 19) & 1),
+ (token >> 15) & 15,
+ (token >> 8) & 127,
+ (token & 0xff),
+ spid);
+ out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
+
+ return out - buf;
+}
+
+static int uhci_show_qh(struct uhci_qh *qh, char *buf, int len, int space)
+{
+ char *out = buf;
+ struct urb_priv *urbp;
+ struct list_head *head, *tmp;
+ struct uhci_td *td;
+ int i = 0, checked = 0, prevactive = 0;
+ __le32 element = qh_element(qh);
+
+ /* Try to make sure there's enough memory */
+ if (len < 80 * 6)
+ return 0;
+
+ out += sprintf(out, "%*s[%p] link (%08x) element (%08x)\n", space, "",
+ qh, le32_to_cpu(qh->link), le32_to_cpu(element));
+
+ if (element & UHCI_PTR_QH)
+ out += sprintf(out, "%*s Element points to QH (bug?)\n", space, "");
+
+ if (element & UHCI_PTR_DEPTH)
+ out += sprintf(out, "%*s Depth traverse\n", space, "");
+
+ if (element & cpu_to_le32(8))
+ out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, "");
+
+ if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
+ out += sprintf(out, "%*s Element is NULL (bug?)\n", space, "");
+
+ if (!qh->urbp) {
+ out += sprintf(out, "%*s urbp == NULL\n", space, "");
+ goto out;
+ }
+
+ urbp = qh->urbp;
+
+ head = &urbp->td_list;
+ tmp = head->next;
+
+ td = list_entry(tmp, struct uhci_td, list);
+
+ if (cpu_to_le32(td->dma_handle) != (element & ~UHCI_PTR_BITS))
+ out += sprintf(out, "%*s Element != First TD\n", space, "");
+
+ while (tmp != head) {
+ struct uhci_td *td = list_entry(tmp, struct uhci_td, list);
+
+ tmp = tmp->next;
+
+ out += sprintf(out, "%*s%d: ", space + 2, "", i++);
+ out += uhci_show_td(td, out, len - (out - buf), 0);
+
+ if (i > 10 && !checked && prevactive && tmp != head &&
+ debug <= 2) {
+ struct list_head *ntmp = tmp;
+ struct uhci_td *ntd = td;
+ int active = 1, ni = i;
+
+ checked = 1;
+
+ while (ntmp != head && ntmp->next != head && active) {
+ ntd = list_entry(ntmp, struct uhci_td, list);
+
+ ntmp = ntmp->next;
+
+ active = td_status(ntd) & TD_CTRL_ACTIVE;
+
+ ni++;
+ }
+
+ if (active && ni > i) {
+ out += sprintf(out, "%*s[skipped %d active TD's]\n", space, "", ni - i);
+ tmp = ntmp;
+ td = ntd;
+ i = ni;
+ }
+ }
+
+ prevactive = td_status(td) & TD_CTRL_ACTIVE;
+ }
+
+ if (list_empty(&urbp->queue_list) || urbp->queued)
+ goto out;
+
+ out += sprintf(out, "%*sQueued QH's:\n", -space, "--");
+
+ head = &urbp->queue_list;
+ tmp = head->next;
+
+ while (tmp != head) {
+ struct urb_priv *nurbp = list_entry(tmp, struct urb_priv,
+ queue_list);
+ tmp = tmp->next;
+
+ out += uhci_show_qh(nurbp->qh, out, len - (out - buf), space);
+ }
+
+out:
+ return out - buf;
+}
+
+#define show_frame_num() \
+ if (!shown) { \
+ shown = 1; \
+ out += sprintf(out, "- Frame %d\n", i); \
+ }
+
+#ifdef CONFIG_PROC_FS
+static const char *qh_names[] = {
+ "skel_int128_qh", "skel_int64_qh",
+ "skel_int32_qh", "skel_int16_qh",
+ "skel_int8_qh", "skel_int4_qh",
+ "skel_int2_qh", "skel_int1_qh",
+ "skel_ls_control_qh", "skel_fs_control_qh",
+ "skel_bulk_qh", "skel_term_qh"
+};
+
+#define show_qh_name() \
+ if (!shown) { \
+ shown = 1; \
+ out += sprintf(out, "- %s\n", qh_names[i]); \
+ }
+
+static int uhci_show_sc(int port, unsigned short status, char *buf, int len)
+{
+ char *out = buf;
+
+ /* Try to make sure there's enough memory */
+ if (len < 160)
+ return 0;
+
+ out += sprintf(out, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n",
+ port,
+ status,
+ (status & USBPORTSC_SUSP) ? " Suspend" : "",
+ (status & USBPORTSC_OCC) ? " OverCurrentChange" : "",
+ (status & USBPORTSC_OC) ? " OverCurrent" : "",
+ (status & USBPORTSC_PR) ? " Reset" : "",
+ (status & USBPORTSC_LSDA) ? " LowSpeed" : "",
+ (status & USBPORTSC_RD) ? " ResumeDetect" : "",
+ (status & USBPORTSC_PEC) ? " EnableChange" : "",
+ (status & USBPORTSC_PE) ? " Enabled" : "",
+ (status & USBPORTSC_CSC) ? " ConnectChange" : "",
+ (status & USBPORTSC_CCS) ? " Connected" : "");
+
+ return out - buf;
+}
+
+static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len)
+{
+ char *out = buf;
+ unsigned long io_addr = uhci->io_addr;
+ unsigned short usbcmd, usbstat, usbint, usbfrnum;
+ unsigned int flbaseadd;
+ unsigned char sof;
+ unsigned short portsc1, portsc2;
+
+ /* Try to make sure there's enough memory */
+ if (len < 80 * 6)
+ return 0;
+
+ usbcmd = inw(io_addr + 0);
+ usbstat = inw(io_addr + 2);
+ usbint = inw(io_addr + 4);
+ usbfrnum = inw(io_addr + 6);
+ flbaseadd = inl(io_addr + 8);
+ sof = inb(io_addr + 12);
+ portsc1 = inw(io_addr + 16);
+ portsc2 = inw(io_addr + 18);
+
+ out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n",
+ usbcmd,
+ (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ",
+ (usbcmd & USBCMD_CF) ? "CF " : "",
+ (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "",
+ (usbcmd & USBCMD_FGR) ? "FGR " : "",
+ (usbcmd & USBCMD_EGSM) ? "EGSM " : "",
+ (usbcmd & USBCMD_GRESET) ? "GRESET " : "",
+ (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "",
+ (usbcmd & USBCMD_RS) ? "RS " : "");
+
+ out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n",
+ usbstat,
+ (usbstat & USBSTS_HCH) ? "HCHalted " : "",
+ (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "",
+ (usbstat & USBSTS_HSE) ? "HostSystemError " : "",
+ (usbstat & USBSTS_RD) ? "ResumeDetect " : "",
+ (usbstat & USBSTS_ERROR) ? "USBError " : "",
+ (usbstat & USBSTS_USBINT) ? "USBINT " : "");
+
+ out += sprintf(out, " usbint = %04x\n", usbint);
+ out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1,
+ 0xfff & (4*(unsigned int)usbfrnum));
+ out += sprintf(out, " flbaseadd = %08x\n", flbaseadd);
+ out += sprintf(out, " sof = %02x\n", sof);
+ out += uhci_show_sc(1, portsc1, out, len - (out - buf));
+ out += uhci_show_sc(2, portsc2, out, len - (out - buf));
+
+ return out - buf;
+}
+
+static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, char *buf, int len)
+{
+ struct list_head *tmp;
+ char *out = buf;
+ int count = 0;
+
+ if (len < 200)
+ return 0;
+
+ out += sprintf(out, "urb_priv [%p] ", urbp);
+ out += sprintf(out, "urb [%p] ", urbp->urb);
+ out += sprintf(out, "qh [%p] ", urbp->qh);
+ out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe));
+ out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT"));
+
+ switch (usb_pipetype(urbp->urb->pipe)) {
+ case PIPE_ISOCHRONOUS: out += sprintf(out, "ISO "); break;
+ case PIPE_INTERRUPT: out += sprintf(out, "INT "); break;
+ case PIPE_BULK: out += sprintf(out, "BLK "); break;
+ case PIPE_CONTROL: out += sprintf(out, "CTL "); break;
+ }
+
+ out += sprintf(out, "%s", (urbp->fsbr ? "FSBR " : ""));
+ out += sprintf(out, "%s", (urbp->fsbr_timeout ? "FSBR_TO " : ""));
+
+ if (urbp->urb->status != -EINPROGRESS)
+ out += sprintf(out, "Status=%d ", urbp->urb->status);
+ //out += sprintf(out, "Inserttime=%lx ",urbp->inserttime);
+ //out += sprintf(out, "FSBRtime=%lx ",urbp->fsbrtime);
+
+ count = 0;
+ list_for_each(tmp, &urbp->td_list)
+ count++;
+ out += sprintf(out, "TDs=%d ",count);
+
+ if (urbp->queued)
+ out += sprintf(out, "queued\n");
+ else {
+ count = 0;
+ list_for_each(tmp, &urbp->queue_list)
+ count++;
+ out += sprintf(out, "queued URBs=%d\n", count);
+ }
+
+ return out - buf;
+}
+
+static int uhci_show_lists(struct uhci_hcd *uhci, char *buf, int len)
+{
+ char *out = buf;
+ struct list_head *head, *tmp;
+ int count;
+
+ out += sprintf(out, "Main list URBs:");
+ if (list_empty(&uhci->urb_list))
+ out += sprintf(out, " Empty\n");
+ else {
+ out += sprintf(out, "\n");
+ count = 0;
+ head = &uhci->urb_list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
+
+ out += sprintf(out, " %d: ", ++count);
+ out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
+ tmp = tmp->next;
+ }
+ }
+
+ out += sprintf(out, "Remove list URBs:");
+ if (list_empty(&uhci->urb_remove_list))
+ out += sprintf(out, " Empty\n");
+ else {
+ out += sprintf(out, "\n");
+ count = 0;
+ head = &uhci->urb_remove_list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
+
+ out += sprintf(out, " %d: ", ++count);
+ out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
+ tmp = tmp->next;
+ }
+ }
+
+ out += sprintf(out, "Complete list URBs:");
+ if (list_empty(&uhci->complete_list))
+ out += sprintf(out, " Empty\n");
+ else {
+ out += sprintf(out, "\n");
+ count = 0;
+ head = &uhci->complete_list;
+ tmp = head->next;
+ while (tmp != head) {
+ struct urb_priv *urbp = list_entry(tmp, struct urb_priv, urb_list);
+
+ out += sprintf(out, " %d: ", ++count);
+ out += uhci_show_urbp(uhci, urbp, out, len - (out - buf));
+ tmp = tmp->next;
+ }
+ }
+
+ return out - buf;
+}
+
+static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
+{
+ unsigned long flags;
+ char *out = buf;
+ int i, j;
+ struct uhci_qh *qh;
+ struct uhci_td *td;
+ struct list_head *tmp, *head;
+
+ spin_lock_irqsave(&uhci->lock, flags);
+
+ out += sprintf(out, "HC status\n");
+ out += uhci_show_status(uhci, out, len - (out - buf));
+
+ out += sprintf(out, "Frame List\n");
+ for (i = 0; i < UHCI_NUMFRAMES; ++i) {
+ int shown = 0;
+ td = uhci->fl->frame_cpu[i];
+ if (!td)
+ continue;
+
+ if (td->dma_handle != (dma_addr_t)uhci->fl->frame[i]) {
+ show_frame_num();
+ out += sprintf(out, " frame list does not match td->dma_handle!\n");
+ }
+ show_frame_num();
+
+ head = &td->fl_list;
+ tmp = head;
+ do {
+ td = list_entry(tmp, struct uhci_td, fl_list);
+ tmp = tmp->next;
+ out += uhci_show_td(td, out, len - (out - buf), 4);
+ } while (tmp != head);
+ }
+
+ out += sprintf(out, "Skeleton QH's\n");
+
+ for (i = 0; i < UHCI_NUM_SKELQH; ++i) {
+ int shown = 0;
+
+ qh = uhci->skelqh[i];
+
+ if (debug > 1) {
+ show_qh_name();
+ out += uhci_show_qh(qh, out, len - (out - buf), 4);
+ }
+
+ /* Last QH is the Terminating QH, it's different */
+ if (i == UHCI_NUM_SKELQH - 1) {
+ if (qh->link != UHCI_PTR_TERM)
+ out += sprintf(out, " bandwidth reclamation on!\n");
+
+ if (qh_element(qh) != cpu_to_le32(uhci->term_td->dma_handle))
+ out += sprintf(out, " skel_term_qh element is not set to term_td!\n");
+
+ continue;
+ }
+
+ j = (i < 7) ? 7 : i+1; /* Next skeleton */
+ if (list_empty(&qh->list)) {
+ if (i < UHCI_NUM_SKELQH - 1) {
+ if (qh->link !=
+ (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH)) {
+ show_qh_name();
+ out += sprintf(out, " skeleton QH not linked to next skeleton QH!\n");
+ }
+ }
+
+ continue;
+ }
+
+ show_qh_name();
+
+ head = &qh->list;
+ tmp = head->next;
+
+ while (tmp != head) {
+ qh = list_entry(tmp, struct uhci_qh, list);
+
+ tmp = tmp->next;
+
+ out += uhci_show_qh(qh, out, len - (out - buf), 4);
+ }
+
+ if (i < UHCI_NUM_SKELQH - 1) {
+ if (qh->link !=
+ (cpu_to_le32(uhci->skelqh[j]->dma_handle) | UHCI_PTR_QH))
+ out += sprintf(out, " last QH not linked to next skeleton!\n");
+ }
+ }
+
+ if (debug > 2)
+ out += uhci_show_lists(uhci, out, len - (out - buf));
+
+ spin_unlock_irqrestore(&uhci->lock, flags);
+
+ return out - buf;
+}
+
+#define MAX_OUTPUT (64 * 1024)
+
+struct uhci_debug {
+ int size;
+ char *data;
+ struct uhci_hcd *uhci;
+};
+
+static int uhci_debug_open(struct inode *inode, struct file *file)
+{
+ struct uhci_hcd *uhci = inode->u.generic_ip;
+ struct uhci_debug *up;
+ int ret = -ENOMEM;
+
+ lock_kernel();
+ up = kmalloc(sizeof(*up), GFP_KERNEL);
+ if (!up)
+ goto out;
+
+ up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL);
+ if (!up->data) {
+ kfree(up);
+ goto out;
+ }
+
+ up->size = uhci_sprint_schedule(uhci, up->data, MAX_OUTPUT);
+
+ file->private_data = up;
+
+ ret = 0;
+out:
+ unlock_kernel();
+ return ret;
+}
+
+static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence)
+{
+ struct uhci_debug *up;
+ loff_t new = -1;
+
+ lock_kernel();
+ up = file->private_data;
+
+ switch (whence) {
+ case 0:
+ new = off;
+ break;
+ case 1:
+ new = file->f_pos + off;
+ break;
+ }
+ if (new < 0 || new > up->size) {
+ unlock_kernel();
+ return -EINVAL;
+ }
+ unlock_kernel();
+ return (file->f_pos = new);
+}
+
+static ssize_t uhci_debug_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ struct uhci_debug *up = file->private_data;
+ return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size);
+}
+
+static int uhci_debug_release(struct inode *inode, struct file *file)
+{
+ struct uhci_debug *up = file->private_data;
+
+ kfree(up->data);
+ kfree(up);
+
+ return 0;
+}
+
+static struct file_operations uhci_debug_operations = {
+ .open = uhci_debug_open,
+ .llseek = uhci_debug_lseek,
+ .read = uhci_debug_read,
+ .release = uhci_debug_release,
+};
+
+#else /* CONFIG_DEBUG_FS */
+
+#define uhci_debug_operations (* (struct file_operations *) NULL)
+
+#endif
generated by cgit v0.10.2 at 2024-11-11 16:13:27 (GMT)