| /* |
| * OHCI HCD (Host Controller Driver) for USB. |
| * |
| * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> |
| * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> |
| * |
| * This file is licenced under the GPL. |
| */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| #ifdef DEBUG |
| |
| #define edstring(ed_type) ({ char *temp; \ |
| switch (ed_type) { \ |
| case PIPE_CONTROL: temp = "ctrl"; break; \ |
| case PIPE_BULK: temp = "bulk"; break; \ |
| case PIPE_INTERRUPT: temp = "intr"; break; \ |
| default: temp = "isoc"; break; \ |
| }; temp;}) |
| #define pipestring(pipe) edstring(usb_pipetype(pipe)) |
| |
| /* debug| print the main components of an URB |
| * small: 0) header + data packets 1) just header |
| */ |
| static void __maybe_unused |
| urb_print(struct urb * urb, char * str, int small, int status) |
| { |
| unsigned int pipe= urb->pipe; |
| |
| if (!urb->dev || !urb->dev->bus) { |
| dbg("%s URB: no dev", str); |
| return; |
| } |
| |
| #ifndef OHCI_VERBOSE_DEBUG |
| if (status != 0) |
| #endif |
| dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d", |
| str, |
| urb, |
| usb_pipedevice (pipe), |
| usb_pipeendpoint (pipe), |
| usb_pipeout (pipe)? "out" : "in", |
| pipestring (pipe), |
| urb->transfer_flags, |
| urb->actual_length, |
| urb->transfer_buffer_length, |
| status); |
| |
| #ifdef OHCI_VERBOSE_DEBUG |
| if (!small) { |
| int i, len; |
| |
| if (usb_pipecontrol (pipe)) { |
| printk (KERN_DEBUG __FILE__ ": setup(8):"); |
| for (i = 0; i < 8 ; i++) |
| printk (" %02x", ((__u8 *) urb->setup_packet) [i]); |
| printk ("\n"); |
| } |
| if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) { |
| printk (KERN_DEBUG __FILE__ ": data(%d/%d):", |
| urb->actual_length, |
| urb->transfer_buffer_length); |
| len = usb_pipeout (pipe)? |
| urb->transfer_buffer_length: urb->actual_length; |
| for (i = 0; i < 16 && i < len; i++) |
| printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]); |
| printk ("%s stat:%d\n", i < len? "...": "", status); |
| } |
| } |
| #endif |
| } |
| |
| #define ohci_dbg_sw(ohci, next, size, format, arg...) \ |
| do { \ |
| if (next != NULL) { \ |
| unsigned s_len; \ |
| s_len = scnprintf (*next, *size, format, ## arg ); \ |
| *size -= s_len; *next += s_len; \ |
| } else \ |
| ohci_dbg(ohci,format, ## arg ); \ |
| } while (0); |
| |
| |
| static void ohci_dump_intr_mask ( |
| struct ohci_hcd *ohci, |
| char *label, |
| u32 mask, |
| char **next, |
| unsigned *size) |
| { |
| ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n", |
| label, |
| mask, |
| (mask & OHCI_INTR_MIE) ? " MIE" : "", |
| (mask & OHCI_INTR_OC) ? " OC" : "", |
| (mask & OHCI_INTR_RHSC) ? " RHSC" : "", |
| (mask & OHCI_INTR_FNO) ? " FNO" : "", |
| (mask & OHCI_INTR_UE) ? " UE" : "", |
| (mask & OHCI_INTR_RD) ? " RD" : "", |
| (mask & OHCI_INTR_SF) ? " SF" : "", |
| (mask & OHCI_INTR_WDH) ? " WDH" : "", |
| (mask & OHCI_INTR_SO) ? " SO" : "" |
| ); |
| } |
| |
| static void maybe_print_eds ( |
| struct ohci_hcd *ohci, |
| char *label, |
| u32 value, |
| char **next, |
| unsigned *size) |
| { |
| if (value) |
| ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value); |
| } |
| |
| static char *hcfs2string (int state) |
| { |
| switch (state) { |
| case OHCI_USB_RESET: return "reset"; |
| case OHCI_USB_RESUME: return "resume"; |
| case OHCI_USB_OPER: return "operational"; |
| case OHCI_USB_SUSPEND: return "suspend"; |
| } |
| return "?"; |
| } |
| |
| // dump control and status registers |
| static void |
| ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size) |
| { |
| struct ohci_regs __iomem *regs = controller->regs; |
| u32 temp; |
| |
| temp = ohci_readl (controller, ®s->revision) & 0xff; |
| ohci_dbg_sw (controller, next, size, |
| "OHCI %d.%d, %s legacy support registers\n", |
| 0x03 & (temp >> 4), (temp & 0x0f), |
| (temp & 0x0100) ? "with" : "NO"); |
| |
| temp = ohci_readl (controller, ®s->control); |
| ohci_dbg_sw (controller, next, size, |
| "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n", |
| temp, |
| (temp & OHCI_CTRL_RWE) ? " RWE" : "", |
| (temp & OHCI_CTRL_RWC) ? " RWC" : "", |
| (temp & OHCI_CTRL_IR) ? " IR" : "", |
| hcfs2string (temp & OHCI_CTRL_HCFS), |
| (temp & OHCI_CTRL_BLE) ? " BLE" : "", |
| (temp & OHCI_CTRL_CLE) ? " CLE" : "", |
| (temp & OHCI_CTRL_IE) ? " IE" : "", |
| (temp & OHCI_CTRL_PLE) ? " PLE" : "", |
| temp & OHCI_CTRL_CBSR |
| ); |
| |
| temp = ohci_readl (controller, ®s->cmdstatus); |
| ohci_dbg_sw (controller, next, size, |
| "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp, |
| (temp & OHCI_SOC) >> 16, |
| (temp & OHCI_OCR) ? " OCR" : "", |
| (temp & OHCI_BLF) ? " BLF" : "", |
| (temp & OHCI_CLF) ? " CLF" : "", |
| (temp & OHCI_HCR) ? " HCR" : "" |
| ); |
| |
| ohci_dump_intr_mask (controller, "intrstatus", |
| ohci_readl (controller, ®s->intrstatus), |
| next, size); |
| ohci_dump_intr_mask (controller, "intrenable", |
| ohci_readl (controller, ®s->intrenable), |
| next, size); |
| // intrdisable always same as intrenable |
| |
| maybe_print_eds (controller, "ed_periodcurrent", |
| ohci_readl (controller, ®s->ed_periodcurrent), |
| next, size); |
| |
| maybe_print_eds (controller, "ed_controlhead", |
| ohci_readl (controller, ®s->ed_controlhead), |
| next, size); |
| maybe_print_eds (controller, "ed_controlcurrent", |
| ohci_readl (controller, ®s->ed_controlcurrent), |
| next, size); |
| |
| maybe_print_eds (controller, "ed_bulkhead", |
| ohci_readl (controller, ®s->ed_bulkhead), |
| next, size); |
| maybe_print_eds (controller, "ed_bulkcurrent", |
| ohci_readl (controller, ®s->ed_bulkcurrent), |
| next, size); |
| |
| maybe_print_eds (controller, "donehead", |
| ohci_readl (controller, ®s->donehead), next, size); |
| } |
| |
| #define dbg_port_sw(hc,num,value,next,size) \ |
| ohci_dbg_sw (hc, next, size, \ |
| "roothub.portstatus [%d] " \ |
| "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ |
| num, temp, \ |
| (temp & RH_PS_PRSC) ? " PRSC" : "", \ |
| (temp & RH_PS_OCIC) ? " OCIC" : "", \ |
| (temp & RH_PS_PSSC) ? " PSSC" : "", \ |
| (temp & RH_PS_PESC) ? " PESC" : "", \ |
| (temp & RH_PS_CSC) ? " CSC" : "", \ |
| \ |
| (temp & RH_PS_LSDA) ? " LSDA" : "", \ |
| (temp & RH_PS_PPS) ? " PPS" : "", \ |
| (temp & RH_PS_PRS) ? " PRS" : "", \ |
| (temp & RH_PS_POCI) ? " POCI" : "", \ |
| (temp & RH_PS_PSS) ? " PSS" : "", \ |
| \ |
| (temp & RH_PS_PES) ? " PES" : "", \ |
| (temp & RH_PS_CCS) ? " CCS" : "" \ |
| ); |
| |
| |
| static void |
| ohci_dump_roothub ( |
| struct ohci_hcd *controller, |
| int verbose, |
| char **next, |
| unsigned *size) |
| { |
| u32 temp, i; |
| |
| temp = roothub_a (controller); |
| if (temp == ~(u32)0) |
| return; |
| |
| if (verbose) { |
| ohci_dbg_sw (controller, next, size, |
| "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp, |
| ((temp & RH_A_POTPGT) >> 24) & 0xff, |
| (temp & RH_A_NOCP) ? " NOCP" : "", |
| (temp & RH_A_OCPM) ? " OCPM" : "", |
| (temp & RH_A_DT) ? " DT" : "", |
| (temp & RH_A_NPS) ? " NPS" : "", |
| (temp & RH_A_PSM) ? " PSM" : "", |
| (temp & RH_A_NDP), controller->num_ports |
| ); |
| temp = roothub_b (controller); |
| ohci_dbg_sw (controller, next, size, |
| "roothub.b %08x PPCM=%04x DR=%04x\n", |
| temp, |
| (temp & RH_B_PPCM) >> 16, |
| (temp & RH_B_DR) |
| ); |
| temp = roothub_status (controller); |
| ohci_dbg_sw (controller, next, size, |
| "roothub.status %08x%s%s%s%s%s%s\n", |
| temp, |
| (temp & RH_HS_CRWE) ? " CRWE" : "", |
| (temp & RH_HS_OCIC) ? " OCIC" : "", |
| (temp & RH_HS_LPSC) ? " LPSC" : "", |
| (temp & RH_HS_DRWE) ? " DRWE" : "", |
| (temp & RH_HS_OCI) ? " OCI" : "", |
| (temp & RH_HS_LPS) ? " LPS" : "" |
| ); |
| } |
| |
| for (i = 0; i < controller->num_ports; i++) { |
| temp = roothub_portstatus (controller, i); |
| dbg_port_sw (controller, i, temp, next, size); |
| } |
| } |
| |
| static void ohci_dump (struct ohci_hcd *controller, int verbose) |
| { |
| ohci_dbg (controller, "OHCI controller state\n"); |
| |
| // dumps some of the state we know about |
| ohci_dump_status (controller, NULL, NULL); |
| if (controller->hcca) |
| ohci_dbg (controller, |
| "hcca frame #%04x\n", ohci_frame_no(controller)); |
| ohci_dump_roothub (controller, 1, NULL, NULL); |
| } |
| |
| static const char data0 [] = "DATA0"; |
| static const char data1 [] = "DATA1"; |
| |
| static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label, |
| const struct td *td) |
| { |
| u32 tmp = hc32_to_cpup (ohci, &td->hwINFO); |
| |
| ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n", |
| label, td, |
| (tmp & TD_DONE) ? " (DONE)" : "", |
| td->urb, td->index, |
| hc32_to_cpup (ohci, &td->hwNextTD)); |
| if ((tmp & TD_ISO) == 0) { |
| const char *toggle, *pid; |
| u32 cbp, be; |
| |
| switch (tmp & TD_T) { |
| case TD_T_DATA0: toggle = data0; break; |
| case TD_T_DATA1: toggle = data1; break; |
| case TD_T_TOGGLE: toggle = "(CARRY)"; break; |
| default: toggle = "(?)"; break; |
| } |
| switch (tmp & TD_DP) { |
| case TD_DP_SETUP: pid = "SETUP"; break; |
| case TD_DP_IN: pid = "IN"; break; |
| case TD_DP_OUT: pid = "OUT"; break; |
| default: pid = "(bad pid)"; break; |
| } |
| ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp, |
| TD_CC_GET(tmp), /* EC, */ toggle, |
| (tmp & TD_DI) >> 21, pid, |
| (tmp & TD_R) ? "R" : ""); |
| cbp = hc32_to_cpup (ohci, &td->hwCBP); |
| be = hc32_to_cpup (ohci, &td->hwBE); |
| ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be, |
| cbp ? (be + 1 - cbp) : 0); |
| } else { |
| unsigned i; |
| ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp, |
| TD_CC_GET(tmp), |
| (tmp >> 24) & 0x07, |
| (tmp & TD_DI) >> 21, |
| tmp & 0x0000ffff); |
| ohci_dbg (ohci, " bp0 %08x be %08x\n", |
| hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff, |
| hc32_to_cpup (ohci, &td->hwBE)); |
| for (i = 0; i < MAXPSW; i++) { |
| u16 psw = ohci_hwPSW (ohci, td, i); |
| int cc = (psw >> 12) & 0x0f; |
| ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i, |
| psw, cc, |
| (cc >= 0x0e) ? "OFFSET" : "SIZE", |
| psw & 0x0fff); |
| } |
| } |
| } |
| |
| /* caller MUST own hcd spinlock if verbose is set! */ |
| static void __maybe_unused |
| ohci_dump_ed (const struct ohci_hcd *ohci, const char *label, |
| const struct ed *ed, int verbose) |
| { |
| u32 tmp = hc32_to_cpu (ohci, ed->hwINFO); |
| char *type = ""; |
| |
| ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n", |
| label, |
| ed, ed->state, edstring (ed->type), |
| hc32_to_cpup (ohci, &ed->hwNextED)); |
| switch (tmp & (ED_IN|ED_OUT)) { |
| case ED_OUT: type = "-OUT"; break; |
| case ED_IN: type = "-IN"; break; |
| /* else from TDs ... control */ |
| } |
| ohci_dbg (ohci, |
| " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp, |
| 0x03ff & (tmp >> 16), |
| (tmp & ED_DEQUEUE) ? " DQ" : "", |
| (tmp & ED_ISO) ? " ISO" : "", |
| (tmp & ED_SKIP) ? " SKIP" : "", |
| (tmp & ED_LOWSPEED) ? " LOW" : "", |
| 0x000f & (tmp >> 7), |
| type, |
| 0x007f & tmp); |
| tmp = hc32_to_cpup (ohci, &ed->hwHeadP); |
| ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n", |
| tmp, |
| (tmp & ED_C) ? data1 : data0, |
| (tmp & ED_H) ? " HALT" : "", |
| hc32_to_cpup (ohci, &ed->hwTailP), |
| verbose ? "" : " (not listing)"); |
| if (verbose) { |
| struct list_head *tmp; |
| |
| /* use ed->td_list because HC concurrently modifies |
| * hwNextTD as it accumulates ed_donelist. |
| */ |
| list_for_each (tmp, &ed->td_list) { |
| struct td *td; |
| td = list_entry (tmp, struct td, td_list); |
| ohci_dump_td (ohci, " ->", td); |
| } |
| } |
| } |
| |
| #else |
| static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {} |
| |
| #undef OHCI_VERBOSE_DEBUG |
| |
| #endif /* DEBUG */ |
| |
| /*-------------------------------------------------------------------------*/ |
| |
| #ifdef STUB_DEBUG_FILES |
| |
| static inline void create_debug_files (struct ohci_hcd *bus) { } |
| static inline void remove_debug_files (struct ohci_hcd *bus) { } |
| |
| #else |
| |
| static int debug_async_open(struct inode *, struct file *); |
| static int debug_periodic_open(struct inode *, struct file *); |
| static int debug_registers_open(struct inode *, struct file *); |
| static int debug_async_open(struct inode *, struct file *); |
| static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); |
| static int debug_close(struct inode *, struct file *); |
| |
| static const struct file_operations debug_async_fops = { |
| .owner = THIS_MODULE, |
| .open = debug_async_open, |
| .read = debug_output, |
| .release = debug_close, |
| }; |
| static const struct file_operations debug_periodic_fops = { |
| .owner = THIS_MODULE, |
| .open = debug_periodic_open, |
| .read = debug_output, |
| .release = debug_close, |
| }; |
| static const struct file_operations debug_registers_fops = { |
| .owner = THIS_MODULE, |
| .open = debug_registers_open, |
| .read = debug_output, |
| .release = debug_close, |
| }; |
| |
| static struct dentry *ohci_debug_root; |
| |
| struct debug_buffer { |
| ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ |
| struct device *dev; |
| struct mutex mutex; /* protect filling of buffer */ |
| size_t count; /* number of characters filled into buffer */ |
| char *page; |
| }; |
| |
| static ssize_t |
| show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed) |
| { |
| unsigned temp, size = count; |
| |
| if (!ed) |
| return 0; |
| |
| /* print first --> last */ |
| while (ed->ed_prev) |
| ed = ed->ed_prev; |
| |
| /* dump a snapshot of the bulk or control schedule */ |
| while (ed) { |
| u32 info = hc32_to_cpu (ohci, ed->hwINFO); |
| u32 headp = hc32_to_cpu (ohci, ed->hwHeadP); |
| struct list_head *entry; |
| struct td *td; |
| |
| temp = scnprintf (buf, size, |
| "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s", |
| ed, |
| (info & ED_LOWSPEED) ? 'l' : 'f', |
| info & 0x7f, |
| (info >> 7) & 0xf, |
| (info & ED_IN) ? "in" : "out", |
| 0x03ff & (info >> 16), |
| info, |
| (info & ED_SKIP) ? " s" : "", |
| (headp & ED_H) ? " H" : "", |
| (headp & ED_C) ? data1 : data0); |
| size -= temp; |
| buf += temp; |
| |
| list_for_each (entry, &ed->td_list) { |
| u32 cbp, be; |
| |
| td = list_entry (entry, struct td, td_list); |
| info = hc32_to_cpup (ohci, &td->hwINFO); |
| cbp = hc32_to_cpup (ohci, &td->hwCBP); |
| be = hc32_to_cpup (ohci, &td->hwBE); |
| temp = scnprintf (buf, size, |
| "\n\ttd %p %s %d cc=%x urb %p (%08x)", |
| td, |
| ({ char *pid; |
| switch (info & TD_DP) { |
| case TD_DP_SETUP: pid = "setup"; break; |
| case TD_DP_IN: pid = "in"; break; |
| case TD_DP_OUT: pid = "out"; break; |
| default: pid = "(?)"; break; |
| } pid;}), |
| cbp ? (be + 1 - cbp) : 0, |
| TD_CC_GET (info), td->urb, info); |
| size -= temp; |
| buf += temp; |
| } |
| |
| temp = scnprintf (buf, size, "\n"); |
| size -= temp; |
| buf += temp; |
| |
| ed = ed->ed_next; |
| } |
| return count - size; |
| } |
| |
| static ssize_t fill_async_buffer(struct debug_buffer *buf) |
| { |
| struct usb_bus *bus; |
| struct usb_hcd *hcd; |
| struct ohci_hcd *ohci; |
| size_t temp; |
| unsigned long flags; |
| |
| bus = dev_get_drvdata(buf->dev); |
| hcd = bus_to_hcd(bus); |
| ohci = hcd_to_ohci(hcd); |
| |
| /* display control and bulk lists together, for simplicity */ |
| spin_lock_irqsave (&ohci->lock, flags); |
| temp = show_list(ohci, buf->page, buf->count, ohci->ed_controltail); |
| temp += show_list(ohci, buf->page + temp, buf->count - temp, |
| ohci->ed_bulktail); |
| spin_unlock_irqrestore (&ohci->lock, flags); |
| |
| return temp; |
| } |
| |
| #define DBG_SCHED_LIMIT 64 |
| |
| static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
| { |
| struct usb_bus *bus; |
| struct usb_hcd *hcd; |
| struct ohci_hcd *ohci; |
| struct ed **seen, *ed; |
| unsigned long flags; |
| unsigned temp, size, seen_count; |
| char *next; |
| unsigned i; |
| |
| if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) |
| return 0; |
| seen_count = 0; |
| |
| bus = (struct usb_bus *)dev_get_drvdata(buf->dev); |
| hcd = bus_to_hcd(bus); |
| ohci = hcd_to_ohci(hcd); |
| next = buf->page; |
| size = PAGE_SIZE; |
| |
| temp = scnprintf (next, size, "size = %d\n", NUM_INTS); |
| size -= temp; |
| next += temp; |
| |
| /* dump a snapshot of the periodic schedule (and load) */ |
| spin_lock_irqsave (&ohci->lock, flags); |
| for (i = 0; i < NUM_INTS; i++) { |
| if (!(ed = ohci->periodic [i])) |
| continue; |
| |
| temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]); |
| size -= temp; |
| next += temp; |
| |
| do { |
| temp = scnprintf (next, size, " ed%d/%p", |
| ed->interval, ed); |
| size -= temp; |
| next += temp; |
| for (temp = 0; temp < seen_count; temp++) { |
| if (seen [temp] == ed) |
| break; |
| } |
| |
| /* show more info the first time around */ |
| if (temp == seen_count) { |
| u32 info = hc32_to_cpu (ohci, ed->hwINFO); |
| struct list_head *entry; |
| unsigned qlen = 0; |
| |
| /* qlen measured here in TDs, not urbs */ |
| list_for_each (entry, &ed->td_list) |
| qlen++; |
| |
| temp = scnprintf (next, size, |
| " (%cs dev%d ep%d%s-%s qlen %u" |
| " max %d %08x%s%s)", |
| (info & ED_LOWSPEED) ? 'l' : 'f', |
| info & 0x7f, |
| (info >> 7) & 0xf, |
| (info & ED_IN) ? "in" : "out", |
| (info & ED_ISO) ? "iso" : "int", |
| qlen, |
| 0x03ff & (info >> 16), |
| info, |
| (info & ED_SKIP) ? " K" : "", |
| (ed->hwHeadP & |
| cpu_to_hc32(ohci, ED_H)) ? |
| " H" : ""); |
| size -= temp; |
| next += temp; |
| |
| if (seen_count < DBG_SCHED_LIMIT) |
| seen [seen_count++] = ed; |
| |
| ed = ed->ed_next; |
| |
| } else { |
| /* we've seen it and what's after */ |
| temp = 0; |
| ed = NULL; |
| } |
| |
| } while (ed); |
| |
| temp = scnprintf (next, size, "\n"); |
| size -= temp; |
| next += temp; |
| } |
| spin_unlock_irqrestore (&ohci->lock, flags); |
| kfree (seen); |
| |
| return PAGE_SIZE - size; |
| } |
| #undef DBG_SCHED_LIMIT |
| |
| static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
| { |
| struct usb_bus *bus; |
| struct usb_hcd *hcd; |
| struct ohci_hcd *ohci; |
| struct ohci_regs __iomem *regs; |
| unsigned long flags; |
| unsigned temp, size; |
| char *next; |
| u32 rdata; |
| |
| bus = (struct usb_bus *)dev_get_drvdata(buf->dev); |
| hcd = bus_to_hcd(bus); |
| ohci = hcd_to_ohci(hcd); |
| regs = ohci->regs; |
| next = buf->page; |
| size = PAGE_SIZE; |
| |
| spin_lock_irqsave (&ohci->lock, flags); |
| |
| /* dump driver info, then registers in spec order */ |
| |
| ohci_dbg_sw (ohci, &next, &size, |
| "bus %s, device %s\n" |
| "%s\n" |
| "%s\n", |
| hcd->self.controller->bus->name, |
| dev_name(hcd->self.controller), |
| hcd->product_desc, |
| hcd_name); |
| |
| if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) { |
| size -= scnprintf (next, size, |
| "SUSPENDED (no register access)\n"); |
| goto done; |
| } |
| |
| ohci_dump_status(ohci, &next, &size); |
| |
| /* hcca */ |
| if (ohci->hcca) |
| ohci_dbg_sw (ohci, &next, &size, |
| "hcca frame 0x%04x\n", ohci_frame_no(ohci)); |
| |
| /* other registers mostly affect frame timings */ |
| rdata = ohci_readl (ohci, ®s->fminterval); |
| temp = scnprintf (next, size, |
| "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n", |
| rdata, (rdata >> 31) ? "FIT " : "", |
| (rdata >> 16) & 0xefff, rdata & 0xffff); |
| size -= temp; |
| next += temp; |
| |
| rdata = ohci_readl (ohci, ®s->fmremaining); |
| temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n", |
| rdata, (rdata >> 31) ? "FRT " : "", |
| rdata & 0x3fff); |
| size -= temp; |
| next += temp; |
| |
| rdata = ohci_readl (ohci, ®s->periodicstart); |
| temp = scnprintf (next, size, "periodicstart 0x%04x\n", |
| rdata & 0x3fff); |
| size -= temp; |
| next += temp; |
| |
| rdata = ohci_readl (ohci, ®s->lsthresh); |
| temp = scnprintf (next, size, "lsthresh 0x%04x\n", |
| rdata & 0x3fff); |
| size -= temp; |
| next += temp; |
| |
| temp = scnprintf (next, size, "hub poll timer %s\n", |
| ohci_to_hcd(ohci)->poll_rh ? "ON" : "off"); |
| size -= temp; |
| next += temp; |
| |
| /* roothub */ |
| ohci_dump_roothub (ohci, 1, &next, &size); |
| |
| done: |
| spin_unlock_irqrestore (&ohci->lock, flags); |
| |
| return PAGE_SIZE - size; |
| } |
| |
| static struct debug_buffer *alloc_buffer(struct device *dev, |
| ssize_t (*fill_func)(struct debug_buffer *)) |
| { |
| struct debug_buffer *buf; |
| |
| buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); |
| |
| if (buf) { |
| buf->dev = dev; |
| buf->fill_func = fill_func; |
| mutex_init(&buf->mutex); |
| } |
| |
| return buf; |
| } |
| |
| static int fill_buffer(struct debug_buffer *buf) |
| { |
| int ret = 0; |
| |
| if (!buf->page) |
| buf->page = (char *)get_zeroed_page(GFP_KERNEL); |
| |
| if (!buf->page) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = buf->fill_func(buf); |
| |
| if (ret >= 0) { |
| buf->count = ret; |
| ret = 0; |
| } |
| |
| out: |
| return ret; |
| } |
| |
| static ssize_t debug_output(struct file *file, char __user *user_buf, |
| size_t len, loff_t *offset) |
| { |
| struct debug_buffer *buf = file->private_data; |
| int ret = 0; |
| |
| mutex_lock(&buf->mutex); |
| if (buf->count == 0) { |
| ret = fill_buffer(buf); |
| if (ret != 0) { |
| mutex_unlock(&buf->mutex); |
| goto out; |
| } |
| } |
| mutex_unlock(&buf->mutex); |
| |
| ret = simple_read_from_buffer(user_buf, len, offset, |
| buf->page, buf->count); |
| |
| out: |
| return ret; |
| |
| } |
| |
| static int debug_close(struct inode *inode, struct file *file) |
| { |
| struct debug_buffer *buf = file->private_data; |
| |
| if (buf) { |
| if (buf->page) |
| free_page((unsigned long)buf->page); |
| kfree(buf); |
| } |
| |
| return 0; |
| } |
| static int debug_async_open(struct inode *inode, struct file *file) |
| { |
| file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); |
| |
| return file->private_data ? 0 : -ENOMEM; |
| } |
| |
| static int debug_periodic_open(struct inode *inode, struct file *file) |
| { |
| file->private_data = alloc_buffer(inode->i_private, |
| fill_periodic_buffer); |
| |
| return file->private_data ? 0 : -ENOMEM; |
| } |
| |
| static int debug_registers_open(struct inode *inode, struct file *file) |
| { |
| file->private_data = alloc_buffer(inode->i_private, |
| fill_registers_buffer); |
| |
| return file->private_data ? 0 : -ENOMEM; |
| } |
| static inline void create_debug_files (struct ohci_hcd *ohci) |
| { |
| struct usb_bus *bus = &ohci_to_hcd(ohci)->self; |
| struct device *dev = bus->dev; |
| |
| ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root); |
| if (!ohci->debug_dir) |
| goto dir_error; |
| |
| ohci->debug_async = debugfs_create_file("async", S_IRUGO, |
| ohci->debug_dir, dev, |
| &debug_async_fops); |
| if (!ohci->debug_async) |
| goto async_error; |
| |
| ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO, |
| ohci->debug_dir, dev, |
| &debug_periodic_fops); |
| if (!ohci->debug_periodic) |
| goto periodic_error; |
| |
| ohci->debug_registers = debugfs_create_file("registers", S_IRUGO, |
| ohci->debug_dir, dev, |
| &debug_registers_fops); |
| if (!ohci->debug_registers) |
| goto registers_error; |
| |
| ohci_dbg (ohci, "created debug files\n"); |
| return; |
| |
| registers_error: |
| debugfs_remove(ohci->debug_periodic); |
| periodic_error: |
| debugfs_remove(ohci->debug_async); |
| async_error: |
| debugfs_remove(ohci->debug_dir); |
| dir_error: |
| ohci->debug_periodic = NULL; |
| ohci->debug_async = NULL; |
| ohci->debug_dir = NULL; |
| } |
| |
| static inline void remove_debug_files (struct ohci_hcd *ohci) |
| { |
| debugfs_remove(ohci->debug_registers); |
| debugfs_remove(ohci->debug_periodic); |
| debugfs_remove(ohci->debug_async); |
| debugfs_remove(ohci->debug_dir); |
| } |
| |
| #endif |
| |
| /*-------------------------------------------------------------------------*/ |
| |