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path: root/drivers/usb/chipidea/debug.c
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Diffstat (limited to 'drivers/usb/chipidea/debug.c')
-rw-r--r--drivers/usb/chipidea/debug.c804
1 files changed, 804 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
new file mode 100644
index 000000000000..c4b3e15532db
--- /dev/null
+++ b/drivers/usb/chipidea/debug.c
@@ -0,0 +1,804 @@
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* Interrupt statistics */
+#define ISR_MASK 0x1F
+static struct isr_statistics {
+ u32 test;
+ u32 ui;
+ u32 uei;
+ u32 pci;
+ u32 uri;
+ u32 sli;
+ u32 none;
+ struct {
+ u32 cnt;
+ u32 buf[ISR_MASK+1];
+ u32 idx;
+ } hndl;
+} isr_statistics;
+
+void dbg_interrupt(u32 intmask)
+{
+ if (!intmask) {
+ isr_statistics.none++;
+ return;
+ }
+
+ isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intmask;
+ isr_statistics.hndl.idx &= ISR_MASK;
+ isr_statistics.hndl.cnt++;
+
+ if (USBi_URI & intmask)
+ isr_statistics.uri++;
+ if (USBi_PCI & intmask)
+ isr_statistics.pci++;
+ if (USBi_UEI & intmask)
+ isr_statistics.uei++;
+ if (USBi_UI & intmask)
+ isr_statistics.ui++;
+ if (USBi_SLI & intmask)
+ isr_statistics.sli++;
+}
+
+/**
+ * hw_register_read: reads all device registers (execute without interruption)
+ * @buf: destination buffer
+ * @size: buffer size
+ *
+ * This function returns number of registers read
+ */
+static size_t hw_register_read(struct ci13xxx *udc, u32 *buf, size_t size)
+{
+ unsigned i;
+
+ if (size > udc->hw_bank.size)
+ size = udc->hw_bank.size;
+
+ for (i = 0; i < size; i++)
+ buf[i] = hw_read(udc, i * sizeof(u32), ~0);
+
+ return size;
+}
+
+/**
+ * hw_register_write: writes to register
+ * @addr: register address
+ * @data: register value
+ *
+ * This function returns an error code
+ */
+static int hw_register_write(struct ci13xxx *udc, u16 addr, u32 data)
+{
+ /* align */
+ addr /= sizeof(u32);
+
+ if (addr >= udc->hw_bank.size)
+ return -EINVAL;
+
+ /* align */
+ addr *= sizeof(u32);
+
+ hw_write(udc, addr, ~0, data);
+ return 0;
+}
+
+/**
+ * hw_intr_clear: disables interrupt & clears interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_clear(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, OP_USBINTR, BIT(n), 0);
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ return 0;
+}
+
+/**
+ * hw_intr_force: enables interrupt & forces interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_force(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
+ hw_write(udc, OP_USBINTR, BIT(n), BIT(n));
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, 0);
+ return 0;
+}
+
+/**
+ * show_device: prints information about device capabilities and status
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_device(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget *gadget = &udc->gadget;
+ int n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
+ gadget->speed);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed = %d\n",
+ gadget->max_speed);
+ /* TODO: Scheduled for removal in 3.8. */
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
+ gadget_is_dualspeed(gadget));
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
+ gadget->is_otg);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
+ gadget->is_a_peripheral);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
+ gadget->b_hnp_enable);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
+ gadget->a_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
+ gadget->a_alt_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
+ (gadget->name ? gadget->name : ""));
+
+ return n;
+}
+static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
+
+/**
+ * show_driver: prints information about attached gadget (if any)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget_driver *driver = udc->driver;
+ int n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ if (driver == NULL)
+ return scnprintf(buf, PAGE_SIZE,
+ "There is no gadget attached!\n");
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
+ (driver->function ? driver->function : ""));
+ n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
+ driver->max_speed);
+
+ return n;
+}
+static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
+
+/* Maximum event message length */
+#define DBG_DATA_MSG 64UL
+
+/* Maximum event messages */
+#define DBG_DATA_MAX 128UL
+
+/* Event buffer descriptor */
+static struct {
+ char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
+ unsigned idx; /* index */
+ unsigned tty; /* print to console? */
+ rwlock_t lck; /* lock */
+} dbg_data = {
+ .idx = 0,
+ .tty = 0,
+ .lck = __RW_LOCK_UNLOCKED(lck)
+};
+
+/**
+ * dbg_dec: decrements debug event index
+ * @idx: buffer index
+ */
+static void dbg_dec(unsigned *idx)
+{
+ *idx = (*idx - 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_inc: increments debug event index
+ * @idx: buffer index
+ */
+static void dbg_inc(unsigned *idx)
+{
+ *idx = (*idx + 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_print: prints the common part of the event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ * @extra: extra information
+ */
+static void dbg_print(u8 addr, const char *name, int status, const char *extra)
+{
+ struct timeval tval;
+ unsigned int stamp;
+ unsigned long flags;
+
+ write_lock_irqsave(&dbg_data.lck, flags);
+
+ do_gettimeofday(&tval);
+ stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
+ stamp = stamp * 1000000 + tval.tv_usec;
+
+ scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
+ "%04X\t? %02X %-7.7s %4i ?\t%s\n",
+ stamp, addr, name, status, extra);
+
+ dbg_inc(&dbg_data.idx);
+
+ write_unlock_irqrestore(&dbg_data.lck, flags);
+
+ if (dbg_data.tty != 0)
+ pr_notice("%04X\t? %02X %-7.7s %4i ?\t%s\n",
+ stamp, addr, name, status, extra);
+}
+
+/**
+ * dbg_done: prints a DONE event
+ * @addr: endpoint address
+ * @td: transfer descriptor
+ * @status: status
+ */
+void dbg_done(u8 addr, const u32 token, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ scnprintf(msg, sizeof(msg), "%d %02X",
+ (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
+ (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
+ dbg_print(addr, "DONE", status, msg);
+}
+
+/**
+ * dbg_event: prints a generic event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ */
+void dbg_event(u8 addr, const char *name, int status)
+{
+ if (name != NULL)
+ dbg_print(addr, name, status, "");
+}
+
+/*
+ * dbg_queue: prints a QUEUE event
+ * @addr: endpoint address
+ * @req: USB request
+ * @status: status
+ */
+void dbg_queue(u8 addr, const struct usb_request *req, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ if (req != NULL) {
+ scnprintf(msg, sizeof(msg),
+ "%d %d", !req->no_interrupt, req->length);
+ dbg_print(addr, "QUEUE", status, msg);
+ }
+}
+
+/**
+ * dbg_setup: prints a SETUP event
+ * @addr: endpoint address
+ * @req: setup request
+ */
+void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
+{
+ char msg[DBG_DATA_MSG];
+
+ 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(addr, "SETUP", 0, msg);
+ }
+}
+
+/**
+ * show_events: displays the event buffer
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_events(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev->parent, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ read_lock_irqsave(&dbg_data.lck, flags);
+
+ i = dbg_data.idx;
+ for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
+ n += strlen(dbg_data.buf[i]);
+ if (n >= PAGE_SIZE) {
+ n -= strlen(dbg_data.buf[i]);
+ break;
+ }
+ }
+ for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
+ j += scnprintf(buf + j, PAGE_SIZE - j,
+ "%s", dbg_data.buf[i]);
+
+ read_unlock_irqrestore(&dbg_data.lck, flags);
+
+ return n;
+}
+
+/**
+ * store_events: configure if events are going to be also printed to console
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_events(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned tty;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
+ dev_err(dev, "<1|0>: enable|disable console log\n");
+ goto done;
+ }
+
+ dbg_data.tty = tty;
+ dev_info(dev, "tty = %u", dbg_data.tty);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
+
+/**
+ * show_inters: interrupt status, enable status and historic
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 intr;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ /*n += scnprintf(buf + n, PAGE_SIZE - n,
+ "status = %08x\n", hw_read_intr_status(udc));
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "enable = %08x\n", hw_read_intr_enable(udc));*/
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
+ isr_statistics.test);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
+ isr_statistics.ui);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
+ isr_statistics.uei);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
+ isr_statistics.pci);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
+ isr_statistics.uri);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? sli = %d\n",
+ isr_statistics.sli);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
+ isr_statistics.none);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
+ isr_statistics.hndl.cnt);
+
+ for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
+ i &= ISR_MASK;
+ intr = isr_statistics.hndl.buf[i];
+
+ if (USBi_UI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
+ intr &= ~USBi_UI;
+ if (USBi_UEI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
+ intr &= ~USBi_UEI;
+ if (USBi_PCI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
+ intr &= ~USBi_PCI;
+ if (USBi_URI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
+ intr &= ~USBi_URI;
+ if (USBi_SLI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
+ intr &= ~USBi_SLI;
+ if (intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
+ if (isr_statistics.hndl.buf[i])
+ n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+
+/**
+ * store_inters: enable & force or disable an individual interrutps
+ * (to be used for test purposes only)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned en, bit;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ goto done;
+ }
+
+ if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
+ dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (en) {
+ if (hw_intr_force(udc, bit))
+ dev_err(dev, "invalid bit number\n");
+ else
+ isr_statistics.test++;
+ } else {
+ if (hw_intr_clear(udc, bit))
+ dev_err(dev, "invalid bit number\n");
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
+
+/**
+ * show_port_test: reads port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_port_test(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ mode = hw_port_test_get(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
+}
+
+/**
+ * store_port_test: writes port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_port_test(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &mode) != 1) {
+ dev_err(udc->dev, "<mode>: set port test mode");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_port_test_set(udc, mode))
+ dev_err(udc->dev, "invalid mode\n");
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
+ show_port_test, store_port_test);
+
+/**
+ * show_qheads: DMA contents of all queue heads
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max/2; i++) {
+ struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
+ struct ci13xxx_ep *mEpTx =
+ &udc->ci13xxx_ep[i + udc->hw_ep_max/2];
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: RX=%08X TX=%08X\n",
+ i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.dma);
+ for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X %08X\n", j,
+ *((u32 *)mEpRx->qh.ptr + j),
+ *((u32 *)mEpTx->qh.ptr + j));
+ }
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
+
+/**
+ * show_registers: dumps all registers
+ *
+ * Check "device.h" for details
+ */
+#define DUMP_ENTRIES 512
+static ssize_t show_registers(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 *dump;
+ unsigned i, k, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
+ if (!dump) {
+ dev_err(udc->dev, "%s: out of memory\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ k = hw_register_read(udc, dump, DUMP_ENTRIES);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ for (i = 0; i < k; i++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "reg[0x%04X] = 0x%08X\n",
+ i * (unsigned)sizeof(u32), dump[i]);
+ }
+ kfree(dump);
+
+ return n;
+}
+
+/**
+ * store_registers: writes value to register address
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_registers(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long addr, data, flags;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%li %li", &addr, &data) != 2) {
+ dev_err(udc->dev,
+ "<addr> <data>: write data to register address\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_register_write(udc, addr, data))
+ dev_err(udc->dev, "invalid address range\n");
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
+ show_registers, store_registers);
+
+/**
+ * show_requests: DMA contents of all requests currently queued (all endpts)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ struct list_head *ptr = NULL;
+ struct ci13xxx_req *req = NULL;
+ unsigned i, j, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max; i++)
+ list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
+ {
+ req = list_entry(ptr, struct ci13xxx_req, queue);
+
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: TD=%08X %s\n",
+ i % udc->hw_ep_max/2, (u32)req->dma,
+ ((i < udc->hw_ep_max/2) ? "RX" : "TX"));
+
+ for (j = 0; j < qSize; j++)
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X\n", j,
+ *((u32 *)req->ptr + j));
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
+
+/**
+ * dbg_create_files: initializes the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+int dbg_create_files(struct device *dev)
+{
+ int retval = 0;
+
+ if (dev == NULL)
+ return -EINVAL;
+ retval = device_create_file(dev, &dev_attr_device);
+ if (retval)
+ goto done;
+ retval = device_create_file(dev, &dev_attr_driver);
+ if (retval)
+ goto rm_device;
+ retval = device_create_file(dev, &dev_attr_events);
+ if (retval)
+ goto rm_driver;
+ retval = device_create_file(dev, &dev_attr_inters);
+ if (retval)
+ goto rm_events;
+ retval = device_create_file(dev, &dev_attr_port_test);
+ if (retval)
+ goto rm_inters;
+ retval = device_create_file(dev, &dev_attr_qheads);
+ if (retval)
+ goto rm_port_test;
+ retval = device_create_file(dev, &dev_attr_registers);
+ if (retval)
+ goto rm_qheads;
+ retval = device_create_file(dev, &dev_attr_requests);
+ if (retval)
+ goto rm_registers;
+ return 0;
+
+ rm_registers:
+ device_remove_file(dev, &dev_attr_registers);
+ rm_qheads:
+ device_remove_file(dev, &dev_attr_qheads);
+ rm_port_test:
+ device_remove_file(dev, &dev_attr_port_test);
+ rm_inters:
+ device_remove_file(dev, &dev_attr_inters);
+ rm_events:
+ device_remove_file(dev, &dev_attr_events);
+ rm_driver:
+ device_remove_file(dev, &dev_attr_driver);
+ rm_device:
+ device_remove_file(dev, &dev_attr_device);
+ done:
+ return retval;
+}
+
+/**
+ * dbg_remove_files: destroys the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+int dbg_remove_files(struct device *dev)
+{
+ if (dev == NULL)
+ return -EINVAL;
+ device_remove_file(dev, &dev_attr_requests);
+ device_remove_file(dev, &dev_attr_registers);
+ device_remove_file(dev, &dev_attr_qheads);
+ device_remove_file(dev, &dev_attr_port_test);
+ device_remove_file(dev, &dev_attr_inters);
+ device_remove_file(dev, &dev_attr_events);
+ device_remove_file(dev, &dev_attr_driver);
+ device_remove_file(dev, &dev_attr_device);
+ return 0;
+}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.