2 * ci13xxx_udc.c - MIPS USB IP core family device controller
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
14 * Description: MIPS USB IP core family device controller
15 * Currently it only supports IP part number CI13412
17 * This driver is composed of several blocks:
18 * - HW: hardware interface
19 * - DBG: debug facilities (optional)
21 * - ISR: interrupts handling
22 * - ENDPT: endpoint operations (Gadget API)
23 * - GADGET: gadget operations (Gadget API)
24 * - BUS: bus glue code, bus abstraction layer
25 * - PCI: PCI core interface and PCI resources (interrupts, memory...)
28 * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
29 * - STALL_IN: non-empty bulk-in pipes cannot be halted
30 * if defined mass storage compliance succeeds but with warnings
34 * if undefined usbtest 13 fails
35 * - TRACE: enable function tracing (depends on DEBUG)
38 * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
39 * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
40 * - Normal & LPM support
43 * - OK: 0-12, 13 (STALL_IN defined) & 14
44 * - Not Supported: 15 & 16 (ISO)
48 * - Isochronous & Interrupt Traffic
49 * - Handle requests which spawns into several TDs
50 * - GET_STATUS(device) - always reports 0
51 * - Gadget API (majority of optional features)
52 * - Suspend & Remote Wakeup
54 #include <linux/delay.h>
55 #include <linux/device.h>
56 #include <linux/dmapool.h>
57 #include <linux/dma-mapping.h>
58 #include <linux/init.h>
59 #include <linux/interrupt.h>
61 #include <linux/irq.h>
62 #include <linux/kernel.h>
63 #include <linux/module.h>
64 #include <linux/pci.h>
65 #include <linux/slab.h>
66 #include <linux/usb/ch9.h>
67 #include <linux/usb/gadget.h>
69 #include "ci13xxx_udc.h"
72 /******************************************************************************
74 *****************************************************************************/
75 /* ctrl register bank access */
76 static DEFINE_SPINLOCK(udc_lock);
79 #define UDC_DRIVER_NAME "ci13xxx_udc"
81 /* control endpoint description */
82 static const struct usb_endpoint_descriptor
84 .bLength = USB_DT_ENDPOINT_SIZE,
85 .bDescriptorType = USB_DT_ENDPOINT,
87 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
88 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
92 static struct ci13xxx *_udc;
94 /* Interrupt statistics */
112 * ffs_nr: find first (least significant) bit set
113 * @x: the word to search
115 * This function returns bit number (instead of position)
117 static int ffs_nr(u32 x)
124 /******************************************************************************
126 *****************************************************************************/
127 /* register bank descriptor */
129 unsigned lpm; /* is LPM? */
130 void __iomem *abs; /* bus map offset */
131 void __iomem *cap; /* bus map offset + CAP offset + CAP data */
132 size_t size; /* bank size */
135 /* UDC register map */
136 #define ABS_CAPLENGTH (0x100UL)
137 #define ABS_HCCPARAMS (0x108UL)
138 #define ABS_DCCPARAMS (0x124UL)
139 #define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL)
140 /* offset to CAPLENTGH (addr + data) */
141 #define CAP_USBCMD (0x000UL)
142 #define CAP_USBSTS (0x004UL)
143 #define CAP_USBINTR (0x008UL)
144 #define CAP_DEVICEADDR (0x014UL)
145 #define CAP_ENDPTLISTADDR (0x018UL)
146 #define CAP_PORTSC (0x044UL)
147 #define CAP_DEVLC (0x084UL)
148 #define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL)
149 #define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL)
150 #define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL)
151 #define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL)
152 #define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL)
153 #define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL)
154 #define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL)
155 #define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL)
157 /* maximum number of enpoints: valid only after hw_device_reset() */
158 static unsigned hw_ep_max;
161 * hw_ep_bit: calculates the bit number
162 * @num: endpoint number
163 * @dir: endpoint direction
165 * This function returns bit number
167 static inline int hw_ep_bit(int num, int dir)
169 return num + (dir ? 16 : 0);
173 * hw_aread: reads from register bitfield
174 * @addr: address relative to bus map
175 * @mask: bitfield mask
177 * This function returns register bitfield data
179 static u32 hw_aread(u32 addr, u32 mask)
181 return ioread32(addr + hw_bank.abs) & mask;
185 * hw_awrite: writes to register bitfield
186 * @addr: address relative to bus map
187 * @mask: bitfield mask
190 static void hw_awrite(u32 addr, u32 mask, u32 data)
192 iowrite32(hw_aread(addr, ~mask) | (data & mask),
197 * hw_cread: reads from register bitfield
198 * @addr: address relative to CAP offset plus content
199 * @mask: bitfield mask
201 * This function returns register bitfield data
203 static u32 hw_cread(u32 addr, u32 mask)
205 return ioread32(addr + hw_bank.cap) & mask;
209 * hw_cwrite: writes to register bitfield
210 * @addr: address relative to CAP offset plus content
211 * @mask: bitfield mask
214 static void hw_cwrite(u32 addr, u32 mask, u32 data)
216 iowrite32(hw_cread(addr, ~mask) | (data & mask),
221 * hw_ctest_and_clear: tests & clears register bitfield
222 * @addr: address relative to CAP offset plus content
223 * @mask: bitfield mask
225 * This function returns register bitfield data
227 static u32 hw_ctest_and_clear(u32 addr, u32 mask)
229 u32 reg = hw_cread(addr, mask);
231 iowrite32(reg, addr + hw_bank.cap);
236 * hw_ctest_and_write: tests & writes register bitfield
237 * @addr: address relative to CAP offset plus content
238 * @mask: bitfield mask
241 * This function returns register bitfield data
243 static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data)
245 u32 reg = hw_cread(addr, ~0);
247 iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap);
248 return (reg & mask) >> ffs_nr(mask);
252 * hw_device_reset: resets chip (execute without interruption)
253 * @base: register base address
255 * This function returns an error code
257 static int hw_device_reset(void __iomem *base)
261 /* bank is a module variable */
264 hw_bank.cap = hw_bank.abs;
265 hw_bank.cap += ABS_CAPLENGTH;
266 hw_bank.cap += ioread8(hw_bank.cap);
268 reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN);
270 hw_bank.size = hw_bank.cap - hw_bank.abs;
271 hw_bank.size += CAP_LAST;
272 hw_bank.size /= sizeof(u32);
274 /* should flush & stop before reset */
275 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0);
276 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
278 hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST);
279 while (hw_cread(CAP_USBCMD, USBCMD_RST))
280 udelay(10); /* not RTOS friendly */
282 /* USBMODE should be configured step by step */
283 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
284 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
285 hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */
287 if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
288 pr_err("cannot enter in device mode");
289 pr_err("lpm = %i", hw_bank.lpm);
293 reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN);
294 if (reg == 0 || reg > ENDPT_MAX)
297 hw_ep_max = reg; /* cache hw ENDPT_MAX */
299 /* setup lock mode ? */
301 /* ENDPTSETUPSTAT is '0' by default */
303 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
309 * hw_device_state: enables/disables interrupts & starts/stops device (execute
310 * without interruption)
311 * @dma: 0 => disable, !0 => enable and set dma engine
313 * This function returns an error code
315 static int hw_device_state(u32 dma)
318 hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma);
319 /* interrupt, error, port change, reset, sleep/suspend */
320 hw_cwrite(CAP_USBINTR, ~0,
321 USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
322 hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS);
324 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
325 hw_cwrite(CAP_USBINTR, ~0, 0);
331 * hw_ep_flush: flush endpoint fifo (execute without interruption)
332 * @num: endpoint number
333 * @dir: endpoint direction
335 * This function returns an error code
337 static int hw_ep_flush(int num, int dir)
339 int n = hw_ep_bit(num, dir);
342 /* flush any pending transfer */
343 hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n));
344 while (hw_cread(CAP_ENDPTFLUSH, BIT(n)))
346 } while (hw_cread(CAP_ENDPTSTAT, BIT(n)));
352 * hw_ep_disable: disables endpoint (execute without interruption)
353 * @num: endpoint number
354 * @dir: endpoint direction
356 * This function returns an error code
358 static int hw_ep_disable(int num, int dir)
360 hw_ep_flush(num, dir);
361 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32),
362 dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
367 * hw_ep_enable: enables endpoint (execute without interruption)
368 * @num: endpoint number
369 * @dir: endpoint direction
370 * @type: endpoint type
372 * This function returns an error code
374 static int hw_ep_enable(int num, int dir, int type)
379 mask = ENDPTCTRL_TXT; /* type */
380 data = type << ffs_nr(mask);
382 mask |= ENDPTCTRL_TXS; /* unstall */
383 mask |= ENDPTCTRL_TXR; /* reset data toggle */
384 data |= ENDPTCTRL_TXR;
385 mask |= ENDPTCTRL_TXE; /* enable */
386 data |= ENDPTCTRL_TXE;
388 mask = ENDPTCTRL_RXT; /* type */
389 data = type << ffs_nr(mask);
391 mask |= ENDPTCTRL_RXS; /* unstall */
392 mask |= ENDPTCTRL_RXR; /* reset data toggle */
393 data |= ENDPTCTRL_RXR;
394 mask |= ENDPTCTRL_RXE; /* enable */
395 data |= ENDPTCTRL_RXE;
397 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data);
402 * hw_ep_get_halt: return endpoint halt status
403 * @num: endpoint number
404 * @dir: endpoint direction
406 * This function returns 1 if endpoint halted
408 static int hw_ep_get_halt(int num, int dir)
410 u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
412 return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0;
416 * hw_ep_is_primed: test if endpoint is primed (execute without interruption)
417 * @num: endpoint number
418 * @dir: endpoint direction
420 * This function returns true if endpoint primed
422 static int hw_ep_is_primed(int num, int dir)
424 u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0);
426 return test_bit(hw_ep_bit(num, dir), (void *)®);
430 * hw_test_and_clear_setup_status: test & clear setup status (execute without
432 * @n: bit number (endpoint)
434 * This function returns setup status
436 static int hw_test_and_clear_setup_status(int n)
438 return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
442 * hw_ep_prime: primes endpoint (execute without interruption)
443 * @num: endpoint number
444 * @dir: endpoint direction
445 * @is_ctrl: true if control endpoint
447 * This function returns an error code
449 static int hw_ep_prime(int num, int dir, int is_ctrl)
451 int n = hw_ep_bit(num, dir);
453 /* the caller should flush first */
454 if (hw_ep_is_primed(num, dir))
457 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
460 hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n));
462 while (hw_cread(CAP_ENDPTPRIME, BIT(n)))
464 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
467 /* status shoult be tested according with manual but it doesn't work */
472 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
473 * without interruption)
474 * @num: endpoint number
475 * @dir: endpoint direction
476 * @value: true => stall, false => unstall
478 * This function returns an error code
480 static int hw_ep_set_halt(int num, int dir, int value)
482 if (value != 0 && value != 1)
486 u32 addr = CAP_ENDPTCTRL + num * sizeof(u32);
487 u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
488 u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
490 /* data toggle - reserved for EP0 but it's in ESS */
491 hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr);
493 } while (value != hw_ep_get_halt(num, dir));
499 * hw_intr_clear: disables interrupt & clears interrupt status (execute without
503 * This function returns an error code
505 static int hw_intr_clear(int n)
510 hw_cwrite(CAP_USBINTR, BIT(n), 0);
511 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
516 * hw_intr_force: enables interrupt & forces interrupt status (execute without
520 * This function returns an error code
522 static int hw_intr_force(int n)
527 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
528 hw_cwrite(CAP_USBINTR, BIT(n), BIT(n));
529 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
530 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, 0);
535 * hw_is_port_high_speed: test if port is high speed
537 * This function returns true if high speed port
539 static int hw_port_is_high_speed(void)
541 return hw_bank.lpm ? hw_cread(CAP_DEVLC, DEVLC_PSPD) :
542 hw_cread(CAP_PORTSC, PORTSC_HSP);
546 * hw_port_test_get: reads port test mode value
548 * This function returns port test mode value
550 static u8 hw_port_test_get(void)
552 return hw_cread(CAP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
556 * hw_port_test_set: writes port test mode (execute without interruption)
559 * This function returns an error code
561 static int hw_port_test_set(u8 mode)
563 const u8 TEST_MODE_MAX = 7;
565 if (mode > TEST_MODE_MAX)
568 hw_cwrite(CAP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
573 * hw_read_intr_enable: returns interrupt enable register
575 * This function returns register data
577 static u32 hw_read_intr_enable(void)
579 return hw_cread(CAP_USBINTR, ~0);
583 * hw_read_intr_status: returns interrupt status register
585 * This function returns register data
587 static u32 hw_read_intr_status(void)
589 return hw_cread(CAP_USBSTS, ~0);
593 * hw_register_read: reads all device registers (execute without interruption)
594 * @buf: destination buffer
597 * This function returns number of registers read
599 static size_t hw_register_read(u32 *buf, size_t size)
603 if (size > hw_bank.size)
606 for (i = 0; i < size; i++)
607 buf[i] = hw_aread(i * sizeof(u32), ~0);
613 * hw_register_write: writes to register
614 * @addr: register address
615 * @data: register value
617 * This function returns an error code
619 static int hw_register_write(u16 addr, u32 data)
624 if (addr >= hw_bank.size)
630 hw_awrite(addr, ~0, data);
635 * hw_test_and_clear_complete: test & clear complete status (execute without
637 * @n: bit number (endpoint)
639 * This function returns complete status
641 static int hw_test_and_clear_complete(int n)
643 return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
647 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
648 * without interruption)
650 * This function returns active interrutps
652 static u32 hw_test_and_clear_intr_active(void)
654 u32 reg = hw_read_intr_status() & hw_read_intr_enable();
656 hw_cwrite(CAP_USBSTS, ~0, reg);
661 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
664 * This function returns guard value
666 static int hw_test_and_clear_setup_guard(void)
668 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, 0);
672 * hw_test_and_set_setup_guard: test & set setup guard (execute without
675 * This function returns guard value
677 static int hw_test_and_set_setup_guard(void)
679 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
683 * hw_usb_set_address: configures USB address (execute without interruption)
684 * @value: new USB address
686 * This function returns an error code
688 static int hw_usb_set_address(u8 value)
691 hw_cwrite(CAP_DEVICEADDR, DEVICEADDR_USBADR | DEVICEADDR_USBADRA,
692 value << ffs_nr(DEVICEADDR_USBADR) | DEVICEADDR_USBADRA);
697 * hw_usb_reset: restart device after a bus reset (execute without
700 * This function returns an error code
702 static int hw_usb_reset(void)
704 hw_usb_set_address(0);
706 /* ESS flushes only at end?!? */
707 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); /* flush all EPs */
709 /* clear setup token semaphores */
710 hw_cwrite(CAP_ENDPTSETUPSTAT, 0, 0); /* writes its content */
712 /* clear complete status */
713 hw_cwrite(CAP_ENDPTCOMPLETE, 0, 0); /* writes its content */
715 /* wait until all bits cleared */
716 while (hw_cread(CAP_ENDPTPRIME, ~0))
717 udelay(10); /* not RTOS friendly */
719 /* reset all endpoints ? */
721 /* reset internal status and wait for further instructions
722 no need to verify the port reset status (ESS does it) */
727 /******************************************************************************
729 *****************************************************************************/
731 * show_device: prints information about device capabilities and status
733 * Check "device.h" for details
735 static ssize_t show_device(struct device *dev, struct device_attribute *attr,
738 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
739 struct usb_gadget *gadget = &udc->gadget;
742 dbg_trace("[%s] %p\n", __func__, buf);
743 if (attr == NULL || buf == NULL) {
744 dev_err(dev, "[%s] EINVAL\n", __func__);
748 n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
750 n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
751 gadget->is_dualspeed);
752 n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
754 n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
755 gadget->is_a_peripheral);
756 n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
757 gadget->b_hnp_enable);
758 n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
759 gadget->a_hnp_support);
760 n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
761 gadget->a_alt_hnp_support);
762 n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
763 (gadget->name ? gadget->name : ""));
767 static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
770 * show_driver: prints information about attached gadget (if any)
772 * Check "device.h" for details
774 static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
777 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
778 struct usb_gadget_driver *driver = udc->driver;
781 dbg_trace("[%s] %p\n", __func__, buf);
782 if (attr == NULL || buf == NULL) {
783 dev_err(dev, "[%s] EINVAL\n", __func__);
788 return scnprintf(buf, PAGE_SIZE,
789 "There is no gadget attached!\n");
791 n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
792 (driver->function ? driver->function : ""));
793 n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
798 static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
800 /* Maximum event message length */
801 #define DBG_DATA_MSG 64UL
803 /* Maximum event messages */
804 #define DBG_DATA_MAX 128UL
806 /* Event buffer descriptor */
808 char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
809 unsigned idx; /* index */
810 unsigned tty; /* print to console? */
811 rwlock_t lck; /* lock */
815 .lck = __RW_LOCK_UNLOCKED(lck)
819 * dbg_dec: decrements debug event index
822 static void dbg_dec(unsigned *idx)
824 *idx = (*idx - 1) & (DBG_DATA_MAX-1);
828 * dbg_inc: increments debug event index
831 static void dbg_inc(unsigned *idx)
833 *idx = (*idx + 1) & (DBG_DATA_MAX-1);
837 * dbg_print: prints the common part of the event
838 * @addr: endpoint address
841 * @extra: extra information
843 static void dbg_print(u8 addr, const char *name, int status, const char *extra)
849 write_lock_irqsave(&dbg_data.lck, flags);
851 do_gettimeofday(&tval);
852 stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
853 stamp = stamp * 1000000 + tval.tv_usec;
855 scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
856 "%04X\t» %02X %-7.7s %4i «\t%s\n",
857 stamp, addr, name, status, extra);
859 dbg_inc(&dbg_data.idx);
861 write_unlock_irqrestore(&dbg_data.lck, flags);
863 if (dbg_data.tty != 0)
864 pr_notice("%04X\t» %02X %-7.7s %4i «\t%s\n",
865 stamp, addr, name, status, extra);
869 * dbg_done: prints a DONE event
870 * @addr: endpoint address
871 * @td: transfer descriptor
874 static void dbg_done(u8 addr, const u32 token, int status)
876 char msg[DBG_DATA_MSG];
878 scnprintf(msg, sizeof(msg), "%d %02X",
879 (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
880 (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
881 dbg_print(addr, "DONE", status, msg);
885 * dbg_event: prints a generic event
886 * @addr: endpoint address
890 static void dbg_event(u8 addr, const char *name, int status)
893 dbg_print(addr, name, status, "");
897 * dbg_queue: prints a QUEUE event
898 * @addr: endpoint address
902 static void dbg_queue(u8 addr, const struct usb_request *req, int status)
904 char msg[DBG_DATA_MSG];
907 scnprintf(msg, sizeof(msg),
908 "%d %d", !req->no_interrupt, req->length);
909 dbg_print(addr, "QUEUE", status, msg);
914 * dbg_setup: prints a SETUP event
915 * @addr: endpoint address
916 * @req: setup request
918 static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
920 char msg[DBG_DATA_MSG];
923 scnprintf(msg, sizeof(msg),
924 "%02X %02X %04X %04X %d", req->bRequestType,
925 req->bRequest, le16_to_cpu(req->wValue),
926 le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
927 dbg_print(addr, "SETUP", 0, msg);
932 * show_events: displays the event buffer
934 * Check "device.h" for details
936 static ssize_t show_events(struct device *dev, struct device_attribute *attr,
940 unsigned i, j, n = 0;
942 dbg_trace("[%s] %p\n", __func__, buf);
943 if (attr == NULL || buf == NULL) {
944 dev_err(dev, "[%s] EINVAL\n", __func__);
948 read_lock_irqsave(&dbg_data.lck, flags);
951 for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
952 n += strlen(dbg_data.buf[i]);
953 if (n >= PAGE_SIZE) {
954 n -= strlen(dbg_data.buf[i]);
958 for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
959 j += scnprintf(buf + j, PAGE_SIZE - j,
960 "%s", dbg_data.buf[i]);
962 read_unlock_irqrestore(&dbg_data.lck, flags);
968 * store_events: configure if events are going to be also printed to console
970 * Check "device.h" for details
972 static ssize_t store_events(struct device *dev, struct device_attribute *attr,
973 const char *buf, size_t count)
977 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
978 if (attr == NULL || buf == NULL) {
979 dev_err(dev, "[%s] EINVAL\n", __func__);
983 if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
984 dev_err(dev, "<1|0>: enable|disable console log\n");
989 dev_info(dev, "tty = %u", dbg_data.tty);
994 static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
997 * show_inters: interrupt status, enable status and historic
999 * Check "device.h" for details
1001 static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
1004 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1005 unsigned long flags;
1007 unsigned i, j, n = 0;
1009 dbg_trace("[%s] %p\n", __func__, buf);
1010 if (attr == NULL || buf == NULL) {
1011 dev_err(dev, "[%s] EINVAL\n", __func__);
1015 spin_lock_irqsave(udc->lock, flags);
1017 n += scnprintf(buf + n, PAGE_SIZE - n,
1018 "status = %08x\n", hw_read_intr_status());
1019 n += scnprintf(buf + n, PAGE_SIZE - n,
1020 "enable = %08x\n", hw_read_intr_enable());
1022 n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
1023 isr_statistics.test);
1024 n += scnprintf(buf + n, PAGE_SIZE - n, "» ui = %d\n",
1026 n += scnprintf(buf + n, PAGE_SIZE - n, "» uei = %d\n",
1027 isr_statistics.uei);
1028 n += scnprintf(buf + n, PAGE_SIZE - n, "» pci = %d\n",
1029 isr_statistics.pci);
1030 n += scnprintf(buf + n, PAGE_SIZE - n, "» uri = %d\n",
1031 isr_statistics.uri);
1032 n += scnprintf(buf + n, PAGE_SIZE - n, "» sli = %d\n",
1033 isr_statistics.sli);
1034 n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
1035 isr_statistics.none);
1036 n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
1037 isr_statistics.hndl.cnt);
1039 for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
1041 intr = isr_statistics.hndl.buf[i];
1044 n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
1046 if (USBi_UEI & intr)
1047 n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
1049 if (USBi_PCI & intr)
1050 n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
1052 if (USBi_URI & intr)
1053 n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
1055 if (USBi_SLI & intr)
1056 n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
1059 n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
1060 if (isr_statistics.hndl.buf[i])
1061 n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
1064 spin_unlock_irqrestore(udc->lock, flags);
1070 * store_inters: enable & force or disable an individual interrutps
1071 * (to be used for test purposes only)
1073 * Check "device.h" for details
1075 static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
1076 const char *buf, size_t count)
1078 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1079 unsigned long flags;
1082 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1083 if (attr == NULL || buf == NULL) {
1084 dev_err(dev, "[%s] EINVAL\n", __func__);
1088 if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
1089 dev_err(dev, "<1|0> <bit>: enable|disable interrupt");
1093 spin_lock_irqsave(udc->lock, flags);
1095 if (hw_intr_force(bit))
1096 dev_err(dev, "invalid bit number\n");
1098 isr_statistics.test++;
1100 if (hw_intr_clear(bit))
1101 dev_err(dev, "invalid bit number\n");
1103 spin_unlock_irqrestore(udc->lock, flags);
1108 static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
1111 * show_port_test: reads port test mode
1113 * Check "device.h" for details
1115 static ssize_t show_port_test(struct device *dev,
1116 struct device_attribute *attr, char *buf)
1118 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1119 unsigned long flags;
1122 dbg_trace("[%s] %p\n", __func__, buf);
1123 if (attr == NULL || buf == NULL) {
1124 dev_err(dev, "[%s] EINVAL\n", __func__);
1128 spin_lock_irqsave(udc->lock, flags);
1129 mode = hw_port_test_get();
1130 spin_unlock_irqrestore(udc->lock, flags);
1132 return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
1136 * store_port_test: writes port test mode
1138 * Check "device.h" for details
1140 static ssize_t store_port_test(struct device *dev,
1141 struct device_attribute *attr,
1142 const char *buf, size_t count)
1144 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1145 unsigned long flags;
1148 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1149 if (attr == NULL || buf == NULL) {
1150 dev_err(dev, "[%s] EINVAL\n", __func__);
1154 if (sscanf(buf, "%u", &mode) != 1) {
1155 dev_err(dev, "<mode>: set port test mode");
1159 spin_lock_irqsave(udc->lock, flags);
1160 if (hw_port_test_set(mode))
1161 dev_err(dev, "invalid mode\n");
1162 spin_unlock_irqrestore(udc->lock, flags);
1167 static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
1168 show_port_test, store_port_test);
1171 * show_qheads: DMA contents of all queue heads
1173 * Check "device.h" for details
1175 static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
1178 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1179 unsigned long flags;
1180 unsigned i, j, n = 0;
1182 dbg_trace("[%s] %p\n", __func__, buf);
1183 if (attr == NULL || buf == NULL) {
1184 dev_err(dev, "[%s] EINVAL\n", __func__);
1188 spin_lock_irqsave(udc->lock, flags);
1189 for (i = 0; i < hw_ep_max; i++) {
1190 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
1191 n += scnprintf(buf + n, PAGE_SIZE - n,
1192 "EP=%02i: RX=%08X TX=%08X\n",
1193 i, (u32)mEp->qh[RX].dma, (u32)mEp->qh[TX].dma);
1194 for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
1195 n += scnprintf(buf + n, PAGE_SIZE - n,
1196 " %04X: %08X %08X\n", j,
1197 *((u32 *)mEp->qh[RX].ptr + j),
1198 *((u32 *)mEp->qh[TX].ptr + j));
1201 spin_unlock_irqrestore(udc->lock, flags);
1205 static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
1208 * show_registers: dumps all registers
1210 * Check "device.h" for details
1212 static ssize_t show_registers(struct device *dev,
1213 struct device_attribute *attr, char *buf)
1215 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1216 unsigned long flags;
1218 unsigned i, k, n = 0;
1220 dbg_trace("[%s] %p\n", __func__, buf);
1221 if (attr == NULL || buf == NULL) {
1222 dev_err(dev, "[%s] EINVAL\n", __func__);
1226 spin_lock_irqsave(udc->lock, flags);
1227 k = hw_register_read(dump, sizeof(dump)/sizeof(u32));
1228 spin_unlock_irqrestore(udc->lock, flags);
1230 for (i = 0; i < k; i++) {
1231 n += scnprintf(buf + n, PAGE_SIZE - n,
1232 "reg[0x%04X] = 0x%08X\n",
1233 i * (unsigned)sizeof(u32), dump[i]);
1240 * store_registers: writes value to register address
1242 * Check "device.h" for details
1244 static ssize_t store_registers(struct device *dev,
1245 struct device_attribute *attr,
1246 const char *buf, size_t count)
1248 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1249 unsigned long addr, data, flags;
1251 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1252 if (attr == NULL || buf == NULL) {
1253 dev_err(dev, "[%s] EINVAL\n", __func__);
1257 if (sscanf(buf, "%li %li", &addr, &data) != 2) {
1258 dev_err(dev, "<addr> <data>: write data to register address");
1262 spin_lock_irqsave(udc->lock, flags);
1263 if (hw_register_write(addr, data))
1264 dev_err(dev, "invalid address range\n");
1265 spin_unlock_irqrestore(udc->lock, flags);
1270 static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
1271 show_registers, store_registers);
1274 * show_requests: DMA contents of all requests currently queued (all endpts)
1276 * Check "device.h" for details
1278 static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
1281 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1282 unsigned long flags;
1283 struct list_head *ptr = NULL;
1284 struct ci13xxx_req *req = NULL;
1285 unsigned i, j, k, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
1287 dbg_trace("[%s] %p\n", __func__, buf);
1288 if (attr == NULL || buf == NULL) {
1289 dev_err(dev, "[%s] EINVAL\n", __func__);
1293 spin_lock_irqsave(udc->lock, flags);
1294 for (i = 0; i < hw_ep_max; i++)
1295 for (k = RX; k <= TX; k++)
1296 list_for_each(ptr, &udc->ci13xxx_ep[i].qh[k].queue)
1298 req = list_entry(ptr,
1299 struct ci13xxx_req, queue);
1301 n += scnprintf(buf + n, PAGE_SIZE - n,
1302 "EP=%02i: TD=%08X %s\n",
1304 ((k == RX) ? "RX" : "TX"));
1306 for (j = 0; j < qSize; j++)
1307 n += scnprintf(buf + n, PAGE_SIZE - n,
1309 *((u32 *)req->ptr + j));
1311 spin_unlock_irqrestore(udc->lock, flags);
1315 static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
1318 * dbg_create_files: initializes the attribute interface
1321 * This function returns an error code
1323 __maybe_unused static int dbg_create_files(struct device *dev)
1329 retval = device_create_file(dev, &dev_attr_device);
1332 retval = device_create_file(dev, &dev_attr_driver);
1335 retval = device_create_file(dev, &dev_attr_events);
1338 retval = device_create_file(dev, &dev_attr_inters);
1341 retval = device_create_file(dev, &dev_attr_port_test);
1344 retval = device_create_file(dev, &dev_attr_qheads);
1347 retval = device_create_file(dev, &dev_attr_registers);
1350 retval = device_create_file(dev, &dev_attr_requests);
1356 device_remove_file(dev, &dev_attr_registers);
1358 device_remove_file(dev, &dev_attr_qheads);
1360 device_remove_file(dev, &dev_attr_port_test);
1362 device_remove_file(dev, &dev_attr_inters);
1364 device_remove_file(dev, &dev_attr_events);
1366 device_remove_file(dev, &dev_attr_driver);
1368 device_remove_file(dev, &dev_attr_device);
1374 * dbg_remove_files: destroys the attribute interface
1377 * This function returns an error code
1379 __maybe_unused static int dbg_remove_files(struct device *dev)
1383 device_remove_file(dev, &dev_attr_requests);
1384 device_remove_file(dev, &dev_attr_registers);
1385 device_remove_file(dev, &dev_attr_qheads);
1386 device_remove_file(dev, &dev_attr_port_test);
1387 device_remove_file(dev, &dev_attr_inters);
1388 device_remove_file(dev, &dev_attr_events);
1389 device_remove_file(dev, &dev_attr_driver);
1390 device_remove_file(dev, &dev_attr_device);
1394 /******************************************************************************
1396 *****************************************************************************/
1398 * _usb_addr: calculates endpoint address from direction & number
1401 static inline u8 _usb_addr(struct ci13xxx_ep *ep)
1403 return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
1407 * _hardware_queue: configures a request at hardware level
1411 * This function returns an error code
1413 static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1417 trace("%p, %p", mEp, mReq);
1419 /* don't queue twice */
1420 if (mReq->req.status == -EALREADY)
1423 if (hw_ep_is_primed(mEp->num, mEp->dir))
1426 mReq->req.status = -EALREADY;
1428 if (mReq->req.length && !mReq->req.dma) {
1430 dma_map_single(mEp->device, mReq->req.buf,
1431 mReq->req.length, mEp->dir ?
1432 DMA_TO_DEVICE : DMA_FROM_DEVICE);
1433 if (mReq->req.dma == 0)
1441 * TODO - handle requests which spawns into several TDs
1443 memset(mReq->ptr, 0, sizeof(*mReq->ptr));
1444 mReq->ptr->next |= TD_TERMINATE;
1445 mReq->ptr->token = mReq->req.length << ffs_nr(TD_TOTAL_BYTES);
1446 mReq->ptr->token &= TD_TOTAL_BYTES;
1447 mReq->ptr->token |= TD_IOC;
1448 mReq->ptr->token |= TD_STATUS_ACTIVE;
1449 mReq->ptr->page[0] = mReq->req.dma;
1450 for (i = 1; i < 5; i++)
1451 mReq->ptr->page[i] =
1452 (mReq->req.dma + i * PAGE_SIZE) & ~TD_RESERVED_MASK;
1456 * At this point it's guaranteed exclusive access to qhead
1457 * (endpt is not primed) so it's no need to use tripwire
1459 mEp->qh[mEp->dir].ptr->td.next = mReq->dma; /* TERMINATE = 0 */
1460 mEp->qh[mEp->dir].ptr->td.token &= ~TD_STATUS; /* clear status */
1461 if (mReq->req.zero == 0)
1462 mEp->qh[mEp->dir].ptr->cap |= QH_ZLT;
1464 mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
1466 wmb(); /* synchronize before ep prime */
1468 return hw_ep_prime(mEp->num, mEp->dir,
1469 mEp->type == USB_ENDPOINT_XFER_CONTROL);
1473 * _hardware_dequeue: handles a request at hardware level
1477 * This function returns an error code
1479 static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1481 trace("%p, %p", mEp, mReq);
1483 if (mReq->req.status != -EALREADY)
1486 if (hw_ep_is_primed(mEp->num, mEp->dir))
1487 hw_ep_flush(mEp->num, mEp->dir);
1489 mReq->req.status = 0;
1492 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
1493 mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1498 mReq->req.status = mReq->ptr->token & TD_STATUS;
1499 if ((TD_STATUS_ACTIVE & mReq->req.status) != 0)
1500 mReq->req.status = -ECONNRESET;
1501 else if ((TD_STATUS_HALTED & mReq->req.status) != 0)
1502 mReq->req.status = -1;
1503 else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
1504 mReq->req.status = -1;
1505 else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
1506 mReq->req.status = -1;
1508 mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
1509 mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
1510 mReq->req.actual = mReq->req.length - mReq->req.actual;
1511 mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
1513 return mReq->req.actual;
1517 * _ep_nuke: dequeues all endpoint requests
1520 * This function returns an error code
1521 * Caller must hold lock
1523 static int _ep_nuke(struct ci13xxx_ep *mEp)
1524 __releases(mEp->lock)
1525 __acquires(mEp->lock)
1532 hw_ep_flush(mEp->num, mEp->dir);
1534 while (!list_empty(&mEp->qh[mEp->dir].queue)) {
1536 /* pop oldest request */
1537 struct ci13xxx_req *mReq = \
1538 list_entry(mEp->qh[mEp->dir].queue.next,
1539 struct ci13xxx_req, queue);
1540 list_del_init(&mReq->queue);
1541 mReq->req.status = -ESHUTDOWN;
1543 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
1544 spin_unlock(mEp->lock);
1545 mReq->req.complete(&mEp->ep, &mReq->req);
1546 spin_lock(mEp->lock);
1553 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
1556 * This function returns an error code
1557 * Caller must hold lock
1559 static int _gadget_stop_activity(struct usb_gadget *gadget)
1560 __releases(udc->lock)
1561 __acquires(udc->lock)
1564 struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
1565 struct ci13xxx_ep *mEp = container_of(gadget->ep0,
1566 struct ci13xxx_ep, ep);
1568 trace("%p", gadget);
1573 spin_unlock(udc->lock);
1575 /* flush all endpoints */
1576 gadget_for_each_ep(ep, gadget) {
1577 usb_ep_fifo_flush(ep);
1579 usb_ep_fifo_flush(gadget->ep0);
1581 udc->driver->disconnect(gadget);
1583 /* make sure to disable all endpoints */
1584 gadget_for_each_ep(ep, gadget) {
1587 usb_ep_disable(gadget->ep0);
1589 if (mEp->status != NULL) {
1590 usb_ep_free_request(gadget->ep0, mEp->status);
1594 spin_lock(udc->lock);
1599 /******************************************************************************
1601 *****************************************************************************/
1603 * isr_reset_handler: USB reset interrupt handler
1606 * This function resets USB engine after a bus reset occurred
1608 static void isr_reset_handler(struct ci13xxx *udc)
1609 __releases(udc->lock)
1610 __acquires(udc->lock)
1612 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[0];
1622 dbg_event(0xFF, "BUS RST", 0);
1624 retval = _gadget_stop_activity(&udc->gadget);
1628 retval = hw_usb_reset();
1632 spin_unlock(udc->lock);
1633 retval = usb_ep_enable(&mEp->ep, &ctrl_endpt_desc);
1635 mEp->status = usb_ep_alloc_request(&mEp->ep, GFP_KERNEL);
1636 if (mEp->status == NULL) {
1637 usb_ep_disable(&mEp->ep);
1641 spin_lock(udc->lock);
1645 err("error: %i", retval);
1649 * isr_get_status_complete: get_status request complete function
1651 * @req: request handled
1653 * Caller must release lock
1655 static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
1657 trace("%p, %p", ep, req);
1659 if (ep == NULL || req == NULL) {
1665 usb_ep_free_request(ep, req);
1669 * isr_get_status_response: get_status request response
1671 * @setup: setup request packet
1673 * This function returns an error code
1675 static int isr_get_status_response(struct ci13xxx_ep *mEp,
1676 struct usb_ctrlrequest *setup)
1677 __releases(mEp->lock)
1678 __acquires(mEp->lock)
1680 struct usb_request *req = NULL;
1681 gfp_t gfp_flags = GFP_ATOMIC;
1682 int dir, num, retval;
1684 trace("%p, %p", mEp, setup);
1686 if (mEp == NULL || setup == NULL)
1689 spin_unlock(mEp->lock);
1690 req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
1691 spin_lock(mEp->lock);
1695 req->complete = isr_get_status_complete;
1697 req->buf = kzalloc(req->length, gfp_flags);
1698 if (req->buf == NULL) {
1703 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1704 /* TODO: D1 - Remote Wakeup; D0 - Self Powered */
1706 } else if ((setup->bRequestType & USB_RECIP_MASK) \
1707 == USB_RECIP_ENDPOINT) {
1708 dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
1710 num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1711 *((u16 *)req->buf) = hw_ep_get_halt(num, dir);
1713 /* else do nothing; reserved for future use */
1715 spin_unlock(mEp->lock);
1716 retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
1717 spin_lock(mEp->lock);
1726 spin_unlock(mEp->lock);
1727 usb_ep_free_request(&mEp->ep, req);
1728 spin_lock(mEp->lock);
1733 * isr_setup_status_phase: queues the status phase of a setup transation
1736 * This function returns an error code
1738 static int isr_setup_status_phase(struct ci13xxx_ep *mEp)
1739 __releases(mEp->lock)
1740 __acquires(mEp->lock)
1746 /* mEp is always valid & configured */
1748 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1749 mEp->dir = (mEp->dir == TX) ? RX : TX;
1751 mEp->status->no_interrupt = 1;
1753 spin_unlock(mEp->lock);
1754 retval = usb_ep_queue(&mEp->ep, mEp->status, GFP_ATOMIC);
1755 spin_lock(mEp->lock);
1761 * isr_tr_complete_low: transaction complete low level handler
1764 * This function returns an error code
1765 * Caller must hold lock
1767 static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
1768 __releases(mEp->lock)
1769 __acquires(mEp->lock)
1771 struct ci13xxx_req *mReq;
1776 if (list_empty(&mEp->qh[mEp->dir].queue))
1779 /* pop oldest request */
1780 mReq = list_entry(mEp->qh[mEp->dir].queue.next,
1781 struct ci13xxx_req, queue);
1782 list_del_init(&mReq->queue);
1784 retval = _hardware_dequeue(mEp, mReq);
1786 dbg_event(_usb_addr(mEp), "DONE", retval);
1790 dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
1792 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
1793 spin_unlock(mEp->lock);
1794 mReq->req.complete(&mEp->ep, &mReq->req);
1795 spin_lock(mEp->lock);
1798 if (!list_empty(&mEp->qh[mEp->dir].queue)) {
1799 mReq = list_entry(mEp->qh[mEp->dir].queue.next,
1800 struct ci13xxx_req, queue);
1801 _hardware_enqueue(mEp, mReq);
1809 * isr_tr_complete_handler: transaction complete interrupt handler
1810 * @udc: UDC descriptor
1812 * This function handles traffic events
1814 static void isr_tr_complete_handler(struct ci13xxx *udc)
1815 __releases(udc->lock)
1816 __acquires(udc->lock)
1827 for (i = 0; i < hw_ep_max; i++) {
1828 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
1829 int type, num, err = -EINVAL;
1830 struct usb_ctrlrequest req;
1833 if (mEp->desc == NULL)
1834 continue; /* not configured */
1836 if ((mEp->dir == RX && hw_test_and_clear_complete(i)) ||
1837 (mEp->dir == TX && hw_test_and_clear_complete(i + 16))) {
1838 err = isr_tr_complete_low(mEp);
1839 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
1840 if (err > 0) /* needs status phase */
1841 err = isr_setup_status_phase(mEp);
1843 dbg_event(_usb_addr(mEp),
1845 spin_unlock(udc->lock);
1846 if (usb_ep_set_halt(&mEp->ep))
1847 err("error: ep_set_halt");
1848 spin_lock(udc->lock);
1853 if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
1854 !hw_test_and_clear_setup_status(i))
1858 warn("ctrl traffic received at endpoint");
1862 /* read_setup_packet */
1864 hw_test_and_set_setup_guard();
1865 memcpy(&req, &mEp->qh[RX].ptr->setup, sizeof(req));
1866 } while (!hw_test_and_clear_setup_guard());
1868 type = req.bRequestType;
1870 mEp->dir = (type & USB_DIR_IN) ? TX : RX;
1872 dbg_setup(_usb_addr(mEp), &req);
1874 switch (req.bRequest) {
1875 case USB_REQ_CLEAR_FEATURE:
1876 if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1877 le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
1879 if (req.wLength != 0)
1881 num = le16_to_cpu(req.wIndex);
1882 num &= USB_ENDPOINT_NUMBER_MASK;
1883 if (!udc->ci13xxx_ep[num].wedge) {
1884 spin_unlock(udc->lock);
1885 err = usb_ep_clear_halt(
1886 &udc->ci13xxx_ep[num].ep);
1887 spin_lock(udc->lock);
1891 err = isr_setup_status_phase(mEp);
1893 case USB_REQ_GET_STATUS:
1894 if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
1895 type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
1896 type != (USB_DIR_IN|USB_RECIP_INTERFACE))
1898 if (le16_to_cpu(req.wLength) != 2 ||
1899 le16_to_cpu(req.wValue) != 0)
1901 err = isr_get_status_response(mEp, &req);
1903 case USB_REQ_SET_ADDRESS:
1904 if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
1906 if (le16_to_cpu(req.wLength) != 0 ||
1907 le16_to_cpu(req.wIndex) != 0)
1909 err = hw_usb_set_address((u8)le16_to_cpu(req.wValue));
1912 err = isr_setup_status_phase(mEp);
1914 case USB_REQ_SET_FEATURE:
1915 if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1916 le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
1918 if (req.wLength != 0)
1920 num = le16_to_cpu(req.wIndex);
1921 num &= USB_ENDPOINT_NUMBER_MASK;
1923 spin_unlock(udc->lock);
1924 err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
1925 spin_lock(udc->lock);
1928 err = isr_setup_status_phase(mEp);
1932 if (req.wLength == 0) /* no data phase */
1935 spin_unlock(udc->lock);
1936 err = udc->driver->setup(&udc->gadget, &req);
1937 spin_lock(udc->lock);
1942 dbg_event(_usb_addr(mEp), "ERROR", err);
1944 spin_unlock(udc->lock);
1945 if (usb_ep_set_halt(&mEp->ep))
1946 err("error: ep_set_halt");
1947 spin_lock(udc->lock);
1952 /******************************************************************************
1954 *****************************************************************************/
1956 * ep_enable: configure endpoint, making it usable
1958 * Check usb_ep_enable() at "usb_gadget.h" for details
1960 static int ep_enable(struct usb_ep *ep,
1961 const struct usb_endpoint_descriptor *desc)
1963 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
1964 int direction, retval = 0;
1965 unsigned long flags;
1967 trace("%p, %p", ep, desc);
1969 if (ep == NULL || desc == NULL)
1972 spin_lock_irqsave(mEp->lock, flags);
1974 /* only internal SW should enable ctrl endpts */
1978 if (!list_empty(&mEp->qh[mEp->dir].queue))
1979 warn("enabling a non-empty endpoint!");
1981 mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
1982 mEp->num = usb_endpoint_num(desc);
1983 mEp->type = usb_endpoint_type(desc);
1985 mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
1987 direction = mEp->dir;
1989 dbg_event(_usb_addr(mEp), "ENABLE", 0);
1991 mEp->qh[mEp->dir].ptr->cap = 0;
1993 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
1994 mEp->qh[mEp->dir].ptr->cap |= QH_IOS;
1995 else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
1996 mEp->qh[mEp->dir].ptr->cap &= ~QH_MULT;
1998 mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
2000 mEp->qh[mEp->dir].ptr->cap |=
2001 (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
2002 mEp->qh[mEp->dir].ptr->td.next |= TD_TERMINATE; /* needed? */
2004 retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
2006 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2007 mEp->dir = (mEp->dir == TX) ? RX : TX;
2009 } while (mEp->dir != direction);
2011 spin_unlock_irqrestore(mEp->lock, flags);
2016 * ep_disable: endpoint is no longer usable
2018 * Check usb_ep_disable() at "usb_gadget.h" for details
2020 static int ep_disable(struct usb_ep *ep)
2022 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2023 int direction, retval = 0;
2024 unsigned long flags;
2030 else if (mEp->desc == NULL)
2033 spin_lock_irqsave(mEp->lock, flags);
2035 /* only internal SW should disable ctrl endpts */
2037 direction = mEp->dir;
2039 dbg_event(_usb_addr(mEp), "DISABLE", 0);
2041 retval |= _ep_nuke(mEp);
2042 retval |= hw_ep_disable(mEp->num, mEp->dir);
2044 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2045 mEp->dir = (mEp->dir == TX) ? RX : TX;
2047 } while (mEp->dir != direction);
2051 spin_unlock_irqrestore(mEp->lock, flags);
2056 * ep_alloc_request: allocate a request object to use with this endpoint
2058 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
2060 static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
2062 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2063 struct ci13xxx_req *mReq = NULL;
2064 unsigned long flags;
2066 trace("%p, %i", ep, gfp_flags);
2073 spin_lock_irqsave(mEp->lock, flags);
2075 mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
2077 INIT_LIST_HEAD(&mReq->queue);
2079 mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
2081 if (mReq->ptr == NULL) {
2087 dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
2089 spin_unlock_irqrestore(mEp->lock, flags);
2091 return (mReq == NULL) ? NULL : &mReq->req;
2095 * ep_free_request: frees a request object
2097 * Check usb_ep_free_request() at "usb_gadget.h" for details
2099 static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
2101 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2102 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2103 unsigned long flags;
2105 trace("%p, %p", ep, req);
2107 if (ep == NULL || req == NULL) {
2110 } else if (!list_empty(&mReq->queue)) {
2115 spin_lock_irqsave(mEp->lock, flags);
2118 dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
2121 dbg_event(_usb_addr(mEp), "FREE", 0);
2123 spin_unlock_irqrestore(mEp->lock, flags);
2127 * ep_queue: queues (submits) an I/O request to an endpoint
2129 * Check usb_ep_queue()* at usb_gadget.h" for details
2131 static int ep_queue(struct usb_ep *ep, struct usb_request *req,
2132 gfp_t __maybe_unused gfp_flags)
2134 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2135 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2137 unsigned long flags;
2139 trace("%p, %p, %X", ep, req, gfp_flags);
2141 if (ep == NULL || req == NULL || mEp->desc == NULL)
2144 spin_lock_irqsave(mEp->lock, flags);
2146 if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
2147 !list_empty(&mEp->qh[mEp->dir].queue)) {
2149 retval = -EOVERFLOW;
2150 warn("endpoint ctrl %X nuked", _usb_addr(mEp));
2153 /* first nuke then test link, e.g. previous status has not sent */
2154 if (!list_empty(&mReq->queue)) {
2156 err("request already in queue");
2160 if (req->length > (4 * PAGE_SIZE)) {
2161 req->length = (4 * PAGE_SIZE);
2163 warn("request length truncated");
2166 dbg_queue(_usb_addr(mEp), req, retval);
2169 mReq->req.status = -EINPROGRESS;
2170 mReq->req.actual = 0;
2171 list_add_tail(&mReq->queue, &mEp->qh[mEp->dir].queue);
2173 retval = _hardware_enqueue(mEp, mReq);
2174 if (retval == -EALREADY || retval == -EBUSY) {
2175 dbg_event(_usb_addr(mEp), "QUEUE", retval);
2180 spin_unlock_irqrestore(mEp->lock, flags);
2185 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
2187 * Check usb_ep_dequeue() at "usb_gadget.h" for details
2189 static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
2191 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2192 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2193 unsigned long flags;
2195 trace("%p, %p", ep, req);
2197 if (ep == NULL || req == NULL || mEp->desc == NULL ||
2198 list_empty(&mReq->queue) || list_empty(&mEp->qh[mEp->dir].queue))
2201 spin_lock_irqsave(mEp->lock, flags);
2203 dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
2205 if (mReq->req.status == -EALREADY)
2206 _hardware_dequeue(mEp, mReq);
2209 list_del_init(&mReq->queue);
2210 req->status = -ECONNRESET;
2212 if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
2213 spin_unlock(mEp->lock);
2214 mReq->req.complete(&mEp->ep, &mReq->req);
2215 spin_lock(mEp->lock);
2218 spin_unlock_irqrestore(mEp->lock, flags);
2223 * ep_set_halt: sets the endpoint halt feature
2225 * Check usb_ep_set_halt() at "usb_gadget.h" for details
2227 static int ep_set_halt(struct usb_ep *ep, int value)
2229 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2230 int direction, retval = 0;
2231 unsigned long flags;
2233 trace("%p, %i", ep, value);
2235 if (ep == NULL || mEp->desc == NULL)
2238 spin_lock_irqsave(mEp->lock, flags);
2241 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
2242 if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
2243 !list_empty(&mEp->qh[mEp->dir].queue)) {
2244 spin_unlock_irqrestore(mEp->lock, flags);
2249 direction = mEp->dir;
2251 dbg_event(_usb_addr(mEp), "HALT", value);
2252 retval |= hw_ep_set_halt(mEp->num, mEp->dir, value);
2257 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2258 mEp->dir = (mEp->dir == TX) ? RX : TX;
2260 } while (mEp->dir != direction);
2262 spin_unlock_irqrestore(mEp->lock, flags);
2267 * ep_set_wedge: sets the halt feature and ignores clear requests
2269 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
2271 static int ep_set_wedge(struct usb_ep *ep)
2273 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2274 unsigned long flags;
2278 if (ep == NULL || mEp->desc == NULL)
2281 spin_lock_irqsave(mEp->lock, flags);
2283 dbg_event(_usb_addr(mEp), "WEDGE", 0);
2286 spin_unlock_irqrestore(mEp->lock, flags);
2288 return usb_ep_set_halt(ep);
2292 * ep_fifo_flush: flushes contents of a fifo
2294 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
2296 static void ep_fifo_flush(struct usb_ep *ep)
2298 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2299 unsigned long flags;
2304 err("%02X: -EINVAL", _usb_addr(mEp));
2308 spin_lock_irqsave(mEp->lock, flags);
2310 dbg_event(_usb_addr(mEp), "FFLUSH", 0);
2311 hw_ep_flush(mEp->num, mEp->dir);
2313 spin_unlock_irqrestore(mEp->lock, flags);
2317 * Endpoint-specific part of the API to the USB controller hardware
2318 * Check "usb_gadget.h" for details
2320 static const struct usb_ep_ops usb_ep_ops = {
2321 .enable = ep_enable,
2322 .disable = ep_disable,
2323 .alloc_request = ep_alloc_request,
2324 .free_request = ep_free_request,
2326 .dequeue = ep_dequeue,
2327 .set_halt = ep_set_halt,
2328 .set_wedge = ep_set_wedge,
2329 .fifo_flush = ep_fifo_flush,
2332 /******************************************************************************
2334 *****************************************************************************/
2336 * Device operations part of the API to the USB controller hardware,
2337 * which don't involve endpoints (or i/o)
2338 * Check "usb_gadget.h" for details
2340 static const struct usb_gadget_ops usb_gadget_ops;
2343 * usb_gadget_probe_driver: register a gadget driver
2344 * @driver: the driver being registered
2345 * @bind: the driver's bind callback
2347 * Check usb_gadget_probe_driver() at <linux/usb/gadget.h> for details.
2348 * Interrupts are enabled here.
2350 int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
2351 int (*bind)(struct usb_gadget *))
2353 struct ci13xxx *udc = _udc;
2354 unsigned long i, k, flags;
2355 int retval = -ENOMEM;
2357 trace("%p", driver);
2359 if (driver == NULL ||
2361 driver->unbind == NULL ||
2362 driver->setup == NULL ||
2363 driver->disconnect == NULL ||
2364 driver->suspend == NULL ||
2365 driver->resume == NULL)
2367 else if (udc == NULL)
2369 else if (udc->driver != NULL)
2372 /* alloc resources */
2373 udc->qh_pool = dma_pool_create("ci13xxx_qh", &udc->gadget.dev,
2374 sizeof(struct ci13xxx_qh),
2376 if (udc->qh_pool == NULL)
2379 udc->td_pool = dma_pool_create("ci13xxx_td", &udc->gadget.dev,
2380 sizeof(struct ci13xxx_td),
2382 if (udc->td_pool == NULL) {
2383 dma_pool_destroy(udc->qh_pool);
2384 udc->qh_pool = NULL;
2388 spin_lock_irqsave(udc->lock, flags);
2390 info("hw_ep_max = %d", hw_ep_max);
2392 udc->driver = driver;
2393 udc->gadget.ops = NULL;
2394 udc->gadget.dev.driver = NULL;
2397 for (i = 0; i < hw_ep_max; i++) {
2398 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
2400 scnprintf(mEp->name, sizeof(mEp->name), "ep%i", (int)i);
2402 mEp->lock = udc->lock;
2403 mEp->device = &udc->gadget.dev;
2404 mEp->td_pool = udc->td_pool;
2406 mEp->ep.name = mEp->name;
2407 mEp->ep.ops = &usb_ep_ops;
2408 mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
2410 /* this allocation cannot be random */
2411 for (k = RX; k <= TX; k++) {
2412 INIT_LIST_HEAD(&mEp->qh[k].queue);
2413 mEp->qh[k].ptr = dma_pool_alloc(udc->qh_pool,
2416 if (mEp->qh[k].ptr == NULL)
2419 memset(mEp->qh[k].ptr, 0,
2420 sizeof(*mEp->qh[k].ptr));
2423 udc->gadget.ep0 = &mEp->ep;
2425 list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
2431 driver->driver.bus = NULL;
2432 udc->gadget.ops = &usb_gadget_ops;
2433 udc->gadget.dev.driver = &driver->driver;
2435 spin_unlock_irqrestore(udc->lock, flags);
2436 retval = bind(&udc->gadget); /* MAY SLEEP */
2437 spin_lock_irqsave(udc->lock, flags);
2440 udc->gadget.ops = NULL;
2441 udc->gadget.dev.driver = NULL;
2445 retval = hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
2448 spin_unlock_irqrestore(udc->lock, flags);
2450 usb_gadget_unregister_driver(driver);
2453 EXPORT_SYMBOL(usb_gadget_probe_driver);
2456 * usb_gadget_unregister_driver: unregister a gadget driver
2458 * Check usb_gadget_unregister_driver() at "usb_gadget.h" for details
2460 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
2462 struct ci13xxx *udc = _udc;
2463 unsigned long i, k, flags;
2465 trace("%p", driver);
2467 if (driver == NULL ||
2468 driver->unbind == NULL ||
2469 driver->setup == NULL ||
2470 driver->disconnect == NULL ||
2471 driver->suspend == NULL ||
2472 driver->resume == NULL ||
2473 driver != udc->driver)
2476 spin_lock_irqsave(udc->lock, flags);
2481 if (udc->gadget.ops != NULL) {
2482 _gadget_stop_activity(&udc->gadget);
2484 spin_unlock_irqrestore(udc->lock, flags);
2485 driver->unbind(&udc->gadget); /* MAY SLEEP */
2486 spin_lock_irqsave(udc->lock, flags);
2488 udc->gadget.ops = NULL;
2489 udc->gadget.dev.driver = NULL;
2492 /* free resources */
2493 for (i = 0; i < hw_ep_max; i++) {
2494 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
2497 udc->gadget.ep0 = NULL;
2498 else if (!list_empty(&mEp->ep.ep_list))
2499 list_del_init(&mEp->ep.ep_list);
2501 for (k = RX; k <= TX; k++)
2502 if (mEp->qh[k].ptr != NULL)
2503 dma_pool_free(udc->qh_pool,
2504 mEp->qh[k].ptr, mEp->qh[k].dma);
2509 spin_unlock_irqrestore(udc->lock, flags);
2511 if (udc->td_pool != NULL) {
2512 dma_pool_destroy(udc->td_pool);
2513 udc->td_pool = NULL;
2515 if (udc->qh_pool != NULL) {
2516 dma_pool_destroy(udc->qh_pool);
2517 udc->qh_pool = NULL;
2522 EXPORT_SYMBOL(usb_gadget_unregister_driver);
2524 /******************************************************************************
2526 *****************************************************************************/
2528 * udc_irq: global interrupt handler
2530 * This function returns IRQ_HANDLED if the IRQ has been handled
2531 * It locks access to registers
2533 static irqreturn_t udc_irq(void)
2535 struct ci13xxx *udc = _udc;
2546 spin_lock(udc->lock);
2547 intr = hw_test_and_clear_intr_active();
2549 isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
2550 isr_statistics.hndl.idx &= ISR_MASK;
2551 isr_statistics.hndl.cnt++;
2553 /* order defines priority - do NOT change it */
2554 if (USBi_URI & intr) {
2555 isr_statistics.uri++;
2556 isr_reset_handler(udc);
2558 if (USBi_PCI & intr) {
2559 isr_statistics.pci++;
2560 udc->gadget.speed = hw_port_is_high_speed() ?
2561 USB_SPEED_HIGH : USB_SPEED_FULL;
2563 if (USBi_UEI & intr)
2564 isr_statistics.uei++;
2565 if (USBi_UI & intr) {
2566 isr_statistics.ui++;
2567 isr_tr_complete_handler(udc);
2569 if (USBi_SLI & intr)
2570 isr_statistics.sli++;
2571 retval = IRQ_HANDLED;
2573 isr_statistics.none++;
2576 spin_unlock(udc->lock);
2582 * udc_release: driver release function
2585 * Currently does nothing
2587 static void udc_release(struct device *dev)
2596 * udc_probe: parent probe must call this to initialize UDC
2597 * @dev: parent device
2598 * @regs: registers base address
2599 * @name: driver name
2601 * This function returns an error code
2602 * No interrupts active, the IRQ has not been requested yet
2603 * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
2605 static int udc_probe(struct device *dev, void __iomem *regs, const char *name)
2607 struct ci13xxx *udc;
2610 trace("%p, %p, %p", dev, regs, name);
2612 if (dev == NULL || regs == NULL || name == NULL)
2615 udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
2619 udc->lock = &udc_lock;
2621 retval = hw_device_reset(regs);
2625 udc->gadget.ops = NULL;
2626 udc->gadget.speed = USB_SPEED_UNKNOWN;
2627 udc->gadget.is_dualspeed = 1;
2628 udc->gadget.is_otg = 0;
2629 udc->gadget.name = name;
2631 INIT_LIST_HEAD(&udc->gadget.ep_list);
2632 udc->gadget.ep0 = NULL;
2634 dev_set_name(&udc->gadget.dev, "gadget");
2635 udc->gadget.dev.dma_mask = dev->dma_mask;
2636 udc->gadget.dev.parent = dev;
2637 udc->gadget.dev.release = udc_release;
2639 retval = device_register(&udc->gadget.dev);
2643 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2644 retval = dbg_create_files(&udc->gadget.dev);
2647 device_unregister(&udc->gadget.dev);
2655 err("error = %i", retval);
2662 * udc_remove: parent remove must call this to remove UDC
2664 * No interrupts active, the IRQ has been released
2666 static void udc_remove(void)
2668 struct ci13xxx *udc = _udc;
2675 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2676 dbg_remove_files(&udc->gadget.dev);
2678 device_unregister(&udc->gadget.dev);
2684 /******************************************************************************
2686 *****************************************************************************/
2688 * ci13xxx_pci_irq: interrut handler
2690 * @pdev: USB Device Controller interrupt source
2692 * This function returns IRQ_HANDLED if the IRQ has been handled
2693 * This is an ISR don't trace, use attribute interface instead
2695 static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
2698 dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
2705 * ci13xxx_pci_probe: PCI probe
2706 * @pdev: USB device controller being probed
2707 * @id: PCI hotplug ID connecting controller to UDC framework
2709 * This function returns an error code
2710 * Allocates basic PCI resources for this USB device controller, and then
2711 * invokes the udc_probe() method to start the UDC associated with it
2713 static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
2714 const struct pci_device_id *id)
2716 void __iomem *regs = NULL;
2722 retval = pci_enable_device(pdev);
2727 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
2729 goto disable_device;
2732 retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
2734 goto disable_device;
2736 /* BAR 0 holds all the registers */
2737 regs = pci_iomap(pdev, 0, 0);
2739 dev_err(&pdev->dev, "Error mapping memory!");
2741 goto release_regions;
2743 pci_set_drvdata(pdev, (__force void *)regs);
2745 pci_set_master(pdev);
2746 pci_try_set_mwi(pdev);
2748 retval = udc_probe(&pdev->dev, regs, UDC_DRIVER_NAME);
2752 /* our device does not have MSI capability */
2754 retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
2755 UDC_DRIVER_NAME, pdev);
2764 pci_iounmap(pdev, regs);
2766 pci_release_regions(pdev);
2768 pci_disable_device(pdev);
2774 * ci13xxx_pci_remove: PCI remove
2775 * @pdev: USB Device Controller being removed
2777 * Reverses the effect of ci13xxx_pci_probe(),
2778 * first invoking the udc_remove() and then releases
2779 * all PCI resources allocated for this USB device controller
2781 static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
2783 free_irq(pdev->irq, pdev);
2785 pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
2786 pci_release_regions(pdev);
2787 pci_disable_device(pdev);
2792 * PCI device structure
2794 * Check "pci.h" for details
2796 static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
2797 { PCI_DEVICE(0x153F, 0x1004) },
2798 { PCI_DEVICE(0x153F, 0x1006) },
2799 { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
2801 MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
2803 static struct pci_driver ci13xxx_pci_driver = {
2804 .name = UDC_DRIVER_NAME,
2805 .id_table = ci13xxx_pci_id_table,
2806 .probe = ci13xxx_pci_probe,
2807 .remove = __devexit_p(ci13xxx_pci_remove),
2811 * ci13xxx_pci_init: module init
2815 static int __init ci13xxx_pci_init(void)
2817 return pci_register_driver(&ci13xxx_pci_driver);
2819 module_init(ci13xxx_pci_init);
2822 * ci13xxx_pci_exit: module exit
2826 static void __exit ci13xxx_pci_exit(void)
2828 pci_unregister_driver(&ci13xxx_pci_driver);
2830 module_exit(ci13xxx_pci_exit);
2832 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
2833 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
2834 MODULE_LICENSE("GPL");
2835 MODULE_VERSION("June 2008");