diff options
Diffstat (limited to 'drivers/usb/chipidea/debug.c')
| -rw-r--r-- | drivers/usb/chipidea/debug.c | 888 |
1 files changed, 194 insertions, 694 deletions
diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c index a62c4a47d52c..36a7063a6cba 100644 --- a/drivers/usb/chipidea/debug.c +++ b/drivers/usb/chipidea/debug.c @@ -1,590 +1,126 @@ -#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/device.h> +#include <linux/types.h> +#include <linux/spinlock.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/uaccess.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 + * ci_device_show: prints information about device capabilities and status */ -static size_t hw_register_read(struct ci13xxx *ci, u32 *buf, size_t size) +static int ci_device_show(struct seq_file *s, void *data) { - unsigned i; - - if (size > ci->hw_bank.size) - size = ci->hw_bank.size; - - for (i = 0; i < size; i++) - buf[i] = hw_read(ci, 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 *ci, u16 addr, u32 data) -{ - /* align */ - addr /= sizeof(u32); - - if (addr >= ci->hw_bank.size) - return -EINVAL; - - /* align */ - addr *= sizeof(u32); - - hw_write(ci, 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 *ci, int n) -{ - if (n >= REG_BITS) - return -EINVAL; - - hw_write(ci, OP_USBINTR, BIT(n), 0); - hw_write(ci, 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 *ci, int n) -{ - if (n >= REG_BITS) - return -EINVAL; - - hw_write(ci, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE); - hw_write(ci, OP_USBINTR, BIT(n), BIT(n)); - hw_write(ci, OP_USBSTS, BIT(n), BIT(n)); - hw_write(ci, 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 *ci = container_of(dev, struct ci13xxx, gadget.dev); + struct ci13xxx *ci = s->private; struct usb_gadget *gadget = &ci->gadget; - int n = 0; - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); + seq_printf(s, "speed = %d\n", gadget->speed); + seq_printf(s, "max_speed = %d\n", gadget->max_speed); + seq_printf(s, "is_otg = %d\n", gadget->is_otg); + seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral); + seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable); + seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support); + seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support); + seq_printf(s, "name = %s\n", + (gadget->name ? gadget->name : "")); + + if (!ci->driver) 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); - 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 *ci = container_of(dev, struct ci13xxx, gadget.dev); - struct usb_gadget_driver *driver = ci->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); + seq_printf(s, "gadget function = %s\n", + (ci->driver->function ? ci->driver->function : "")); + seq_printf(s, "gadget max speed = %d\n", ci->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(dbg_data.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); - } + return 0; } -/** - * 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) +static int ci_device_open(struct inode *inode, struct file *file) { - 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; + return single_open(file, ci_device_show, inode->i_private); } -/** - * 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); +static const struct file_operations ci_device_fops = { + .open = ci_device_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; /** - * show_inters: interrupt status, enable status and historic - * - * Check "device.h" for details + * ci_port_test_show: reads port test mode */ -static ssize_t show_inters(struct device *dev, struct device_attribute *attr, - char *buf) +static int ci_port_test_show(struct seq_file *s, void *data) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); + struct ci13xxx *ci = s->private; unsigned long flags; - u32 intr; - unsigned i, j, n = 0; - - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); - return 0; - } + unsigned mode; spin_lock_irqsave(&ci->lock, flags); - - /*n += scnprintf(buf + n, PAGE_SIZE - n, - "status = %08x\n", hw_read_intr_status(ci)); - n += scnprintf(buf + n, PAGE_SIZE - n, - "enable = %08x\n", hw_read_intr_enable(ci));*/ - - 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"); - } - + mode = hw_port_test_get(ci); spin_unlock_irqrestore(&ci->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 *ci = container_of(dev, struct ci13xxx, gadget.dev); - unsigned long flags; - unsigned en, bit; - - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "EINVAL\n"); - goto done; - } + seq_printf(s, "mode = %u\n", mode); - if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) { - dev_err(ci->dev, "<1|0> <bit>: enable|disable interrupt\n"); - goto done; - } - - spin_lock_irqsave(&ci->lock, flags); - if (en) { - if (hw_intr_force(ci, bit)) - dev_err(dev, "invalid bit number\n"); - else - isr_statistics.test++; - } else { - if (hw_intr_clear(ci, bit)) - dev_err(dev, "invalid bit number\n"); - } - spin_unlock_irqrestore(&ci->lock, flags); - - done: - return count; + return 0; } -static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters); /** - * show_port_test: reads port test mode - * - * Check "device.h" for details + * ci_port_test_write: writes port test mode */ -static ssize_t show_port_test(struct device *dev, - struct device_attribute *attr, char *buf) +static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); + struct seq_file *s = file->private_data; + struct ci13xxx *ci = s->private; unsigned long flags; unsigned mode; + char buf[32]; + int ret; - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "EINVAL\n"); - return 0; - } + if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + if (sscanf(buf, "%u", &mode) != 1) + return -EINVAL; spin_lock_irqsave(&ci->lock, flags); - mode = hw_port_test_get(ci); + ret = hw_port_test_set(ci, mode); spin_unlock_irqrestore(&ci->lock, flags); - return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode); + return ret ? ret : count; } -/** - * 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) +static int ci_port_test_open(struct inode *inode, struct file *file) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); - unsigned long flags; - unsigned mode; - - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); - goto done; - } - - if (sscanf(buf, "%u", &mode) != 1) { - dev_err(ci->dev, "<mode>: set port test mode"); - goto done; - } - - spin_lock_irqsave(&ci->lock, flags); - if (hw_port_test_set(ci, mode)) - dev_err(ci->dev, "invalid mode\n"); - spin_unlock_irqrestore(&ci->lock, flags); - - done: - return count; + return single_open(file, ci_port_test_show, inode->i_private); } -static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR, - show_port_test, store_port_test); + +static const struct file_operations ci_port_test_fops = { + .open = ci_port_test_open, + .write = ci_port_test_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; /** - * show_qheads: DMA contents of all queue heads - * - * Check "device.h" for details + * ci_qheads_show: DMA contents of all queue heads */ -static ssize_t show_qheads(struct device *dev, struct device_attribute *attr, - char *buf) +static int ci_qheads_show(struct seq_file *s, void *data) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); + struct ci13xxx *ci = s->private; unsigned long flags; - unsigned i, j, n = 0; + unsigned i, j; - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); + if (ci->role != CI_ROLE_GADGET) { + seq_printf(s, "not in gadget mode\n"); return 0; } @@ -593,209 +129,173 @@ static ssize_t show_qheads(struct device *dev, struct device_attribute *attr, struct ci13xxx_ep *mEpRx = &ci->ci13xxx_ep[i]; struct ci13xxx_ep *mEpTx = &ci->ci13xxx_ep[i + ci->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)); - } + seq_printf(s, "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++) + seq_printf(s, " %04X: %08X %08X\n", j, + *((u32 *)mEpRx->qh.ptr + j), + *((u32 *)mEpTx->qh.ptr + j)); } spin_unlock_irqrestore(&ci->lock, flags); - return n; + return 0; +} + +static int ci_qheads_open(struct inode *inode, struct file *file) +{ + return single_open(file, ci_qheads_show, inode->i_private); } -static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL); + +static const struct file_operations ci_qheads_fops = { + .open = ci_qheads_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; /** - * show_registers: dumps all registers - * - * Check "device.h" for details + * ci_requests_show: DMA contents of all requests currently queued (all endpts) */ -#define DUMP_ENTRIES 512 -static ssize_t show_registers(struct device *dev, - struct device_attribute *attr, char *buf) +static int ci_requests_show(struct seq_file *s, void *data) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); + struct ci13xxx *ci = s->private; unsigned long flags; - u32 *dump; - unsigned i, k, n = 0; - - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); - return 0; - } + struct list_head *ptr = NULL; + struct ci13xxx_req *req = NULL; + unsigned i, j, qsize = sizeof(struct ci13xxx_td)/sizeof(u32); - dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL); - if (!dump) { - dev_err(ci->dev, "%s: out of memory\n", __func__); + if (ci->role != CI_ROLE_GADGET) { + seq_printf(s, "not in gadget mode\n"); return 0; } spin_lock_irqsave(&ci->lock, flags); - k = hw_register_read(ci, dump, DUMP_ENTRIES); - spin_unlock_irqrestore(&ci->lock, flags); + for (i = 0; i < ci->hw_ep_max; i++) + list_for_each(ptr, &ci->ci13xxx_ep[i].qh.queue) { + req = list_entry(ptr, struct ci13xxx_req, queue); - 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); + seq_printf(s, "EP=%02i: TD=%08X %s\n", + i % (ci->hw_ep_max / 2), (u32)req->dma, + ((i < ci->hw_ep_max/2) ? "RX" : "TX")); + + for (j = 0; j < qsize; j++) + seq_printf(s, " %04X: %08X\n", j, + *((u32 *)req->ptr + j)); + } + spin_unlock_irqrestore(&ci->lock, flags); - return n; + return 0; } -/** - * 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) +static int ci_requests_open(struct inode *inode, struct file *file) { - struct ci13xxx *ci = container_of(dev, struct ci13xxx, gadget.dev); - unsigned long addr, data, flags; + return single_open(file, ci_requests_show, inode->i_private); +} - if (attr == NULL || buf == NULL) { - dev_err(ci->dev, "[%s] EINVAL\n", __func__); - goto done; - } +static const struct file_operations ci_requests_fops = { + .open = ci_requests_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; - if (sscanf(buf, "%li %li", &addr, &data) != 2) { - dev_err(ci->dev, - "<addr> <data>: write data to register address\n"); - goto done; - } +static int ci_role_show(struct seq_file *s, void *data) +{ + struct ci13xxx *ci = s->private; - spin_lock_irqsave(&ci->lock, flags); - if (hw_register_write(ci, addr, data)) - dev_err(ci->dev, "invalid address range\n"); - spin_unlock_irqrestore(&ci->lock, flags); + seq_printf(s, "%s\n", ci_role(ci)->name); - done: - return count; + return 0; } -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) +static ssize_t ci_role_write(struct file *file, const char __user *ubuf, + size_t count, loff_t *ppos) { - struct ci13xxx *ci = 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(ci->dev, "[%s] EINVAL\n", __func__); - return 0; - } + struct seq_file *s = file->private_data; + struct ci13xxx *ci = s->private; + enum ci_role role; + char buf[8]; + int ret; + + if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) + return -EFAULT; + + for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) + if (ci->roles[role] && + !strncmp(buf, ci->roles[role]->name, + strlen(ci->roles[role]->name))) + break; - spin_lock_irqsave(&ci->lock, flags); - for (i = 0; i < ci->hw_ep_max; i++) - list_for_each(ptr, &ci->ci13xxx_ep[i].qh.queue) - { - req = list_entry(ptr, struct ci13xxx_req, queue); + if (role == CI_ROLE_END || role == ci->role) + return -EINVAL; - n += scnprintf(buf + n, PAGE_SIZE - n, - "EP=%02i: TD=%08X %s\n", - i % ci->hw_ep_max/2, (u32)req->dma, - ((i < ci->hw_ep_max/2) ? "RX" : "TX")); + ci_role_stop(ci); + ret = ci_role_start(ci, role); - for (j = 0; j < qSize; j++) - n += scnprintf(buf + n, PAGE_SIZE - n, - " %04X: %08X\n", j, - *((u32 *)req->ptr + j)); - } - spin_unlock_irqrestore(&ci->lock, flags); + return ret ? ret : count; +} - return n; +static int ci_role_open(struct inode *inode, struct file *file) +{ + return single_open(file, ci_role_show, inode->i_private); } -static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL); + +static const struct file_operations ci_role_fops = { + .open = ci_role_open, + .write = ci_role_write, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; /** * dbg_create_files: initializes the attribute interface - * @dev: device + * @ci: device * * This function returns an error code */ -int dbg_create_files(struct device *dev) +int dbg_create_files(struct ci13xxx *ci) { - 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; + struct dentry *dent; + + ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL); + if (!ci->debugfs) + return -ENOMEM; + + dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, + &ci_device_fops); + if (!dent) + goto err; + + dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, + ci, &ci_port_test_fops); + if (!dent) + goto err; + + dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, + &ci_qheads_fops); + if (!dent) + goto err; + + dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, + &ci_requests_fops); + if (!dent) + goto err; + + dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, + &ci_role_fops); + if (dent) + return 0; +err: + debugfs_remove_recursive(ci->debugfs); + return -ENOMEM; } /** * dbg_remove_files: destroys the attribute interface - * @dev: device - * - * This function returns an error code + * @ci: device */ -int dbg_remove_files(struct device *dev) +void dbg_remove_files(struct ci13xxx *ci) { - 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; + debugfs_remove_recursive(ci->debugfs); } |