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
27 * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
28 * - STALL_IN: non-empty bulk-in pipes cannot be halted
29 * if defined mass storage compliance succeeds but with warnings
33 * if undefined usbtest 13 fails
34 * - TRACE: enable function tracing (depends on DEBUG)
37 * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
38 * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
39 * - Normal & LPM support
42 * - OK: 0-12, 13 (STALL_IN defined) & 14
43 * - Not Supported: 15 & 16 (ISO)
47 * - Isochronous & Interrupt Traffic
48 * - Handle requests which spawns into several TDs
49 * - GET_STATUS(device) - always reports 0
50 * - Gadget API (majority of optional features)
51 * - Suspend & Remote Wakeup
53 #include <linux/delay.h>
54 #include <linux/device.h>
55 #include <linux/dmapool.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/init.h>
58 #include <linux/interrupt.h>
60 #include <linux/irq.h>
61 #include <linux/kernel.h>
62 #include <linux/slab.h>
63 #include <linux/pm_runtime.h>
64 #include <linux/usb/ch9.h>
65 #include <linux/usb/gadget.h>
66 #include <linux/usb/otg.h>
68 #include "ci13xxx_udc.h"
71 /******************************************************************************
73 *****************************************************************************/
75 #define DMA_ADDR_INVALID (~(dma_addr_t)0)
77 /* ctrl register bank access */
78 static DEFINE_SPINLOCK(udc_lock);
80 /* control endpoint description */
81 static const struct usb_endpoint_descriptor
82 ctrl_endpt_out_desc = {
83 .bLength = USB_DT_ENDPOINT_SIZE,
84 .bDescriptorType = USB_DT_ENDPOINT,
86 .bEndpointAddress = USB_DIR_OUT,
87 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
88 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
91 static const struct usb_endpoint_descriptor
92 ctrl_endpt_in_desc = {
93 .bLength = USB_DT_ENDPOINT_SIZE,
94 .bDescriptorType = USB_DT_ENDPOINT,
96 .bEndpointAddress = USB_DIR_IN,
97 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
98 .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
102 static struct ci13xxx *_udc;
104 /* Interrupt statistics */
105 #define ISR_MASK 0x1F
122 * ffs_nr: find first (least significant) bit set
123 * @x: the word to search
125 * This function returns bit number (instead of position)
127 static int ffs_nr(u32 x)
134 /******************************************************************************
136 *****************************************************************************/
137 /* register bank descriptor */
139 unsigned lpm; /* is LPM? */
140 void __iomem *abs; /* bus map offset */
141 void __iomem *cap; /* bus map offset + CAP offset + CAP data */
142 size_t size; /* bank size */
146 #define ABS_AHBBURST (0x0090UL)
147 #define ABS_AHBMODE (0x0098UL)
148 /* UDC register map */
149 #define ABS_CAPLENGTH (0x100UL)
150 #define ABS_HCCPARAMS (0x108UL)
151 #define ABS_DCCPARAMS (0x124UL)
152 #define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL)
153 /* offset to CAPLENTGH (addr + data) */
154 #define CAP_USBCMD (0x000UL)
155 #define CAP_USBSTS (0x004UL)
156 #define CAP_USBINTR (0x008UL)
157 #define CAP_DEVICEADDR (0x014UL)
158 #define CAP_ENDPTLISTADDR (0x018UL)
159 #define CAP_PORTSC (0x044UL)
160 #define CAP_DEVLC (0x084UL)
161 #define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL)
162 #define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL)
163 #define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL)
164 #define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL)
165 #define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL)
166 #define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL)
167 #define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL)
168 #define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL)
170 /* maximum number of enpoints: valid only after hw_device_reset() */
171 static unsigned hw_ep_max;
174 * hw_ep_bit: calculates the bit number
175 * @num: endpoint number
176 * @dir: endpoint direction
178 * This function returns bit number
180 static inline int hw_ep_bit(int num, int dir)
182 return num + (dir ? 16 : 0);
185 static int ep_to_bit(int n)
187 int fill = 16 - hw_ep_max / 2;
189 if (n >= hw_ep_max / 2)
196 * hw_aread: reads from register bitfield
197 * @addr: address relative to bus map
198 * @mask: bitfield mask
200 * This function returns register bitfield data
202 static u32 hw_aread(u32 addr, u32 mask)
204 return ioread32(addr + hw_bank.abs) & mask;
208 * hw_awrite: writes to register bitfield
209 * @addr: address relative to bus map
210 * @mask: bitfield mask
213 static void hw_awrite(u32 addr, u32 mask, u32 data)
215 iowrite32(hw_aread(addr, ~mask) | (data & mask),
220 * hw_cread: reads from register bitfield
221 * @addr: address relative to CAP offset plus content
222 * @mask: bitfield mask
224 * This function returns register bitfield data
226 static u32 hw_cread(u32 addr, u32 mask)
228 return ioread32(addr + hw_bank.cap) & mask;
232 * hw_cwrite: writes to register bitfield
233 * @addr: address relative to CAP offset plus content
234 * @mask: bitfield mask
237 static void hw_cwrite(u32 addr, u32 mask, u32 data)
239 iowrite32(hw_cread(addr, ~mask) | (data & mask),
244 * hw_ctest_and_clear: tests & clears register bitfield
245 * @addr: address relative to CAP offset plus content
246 * @mask: bitfield mask
248 * This function returns register bitfield data
250 static u32 hw_ctest_and_clear(u32 addr, u32 mask)
252 u32 reg = hw_cread(addr, mask);
254 iowrite32(reg, addr + hw_bank.cap);
259 * hw_ctest_and_write: tests & writes register bitfield
260 * @addr: address relative to CAP offset plus content
261 * @mask: bitfield mask
264 * This function returns register bitfield data
266 static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data)
268 u32 reg = hw_cread(addr, ~0);
270 iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap);
271 return (reg & mask) >> ffs_nr(mask);
274 static int hw_device_init(void __iomem *base)
278 /* bank is a module variable */
281 hw_bank.cap = hw_bank.abs;
282 hw_bank.cap += ABS_CAPLENGTH;
283 hw_bank.cap += ioread8(hw_bank.cap);
285 reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN);
287 hw_bank.size = hw_bank.cap - hw_bank.abs;
288 hw_bank.size += CAP_LAST;
289 hw_bank.size /= sizeof(u32);
291 reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN);
292 hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
294 if (hw_ep_max == 0 || hw_ep_max > ENDPT_MAX)
297 /* setup lock mode ? */
299 /* ENDPTSETUPSTAT is '0' by default */
301 /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
306 * hw_device_reset: resets chip (execute without interruption)
307 * @base: register base address
309 * This function returns an error code
311 static int hw_device_reset(struct ci13xxx *udc)
313 /* should flush & stop before reset */
314 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0);
315 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
317 hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST);
318 while (hw_cread(CAP_USBCMD, USBCMD_RST))
319 udelay(10); /* not RTOS friendly */
322 if (udc->udc_driver->notify_event)
323 udc->udc_driver->notify_event(udc,
324 CI13XXX_CONTROLLER_RESET_EVENT);
326 if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
327 hw_cwrite(CAP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
329 /* USBMODE should be configured step by step */
330 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
331 hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
332 hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */
334 if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
335 pr_err("cannot enter in device mode");
336 pr_err("lpm = %i", hw_bank.lpm);
344 * hw_device_state: enables/disables interrupts & starts/stops device (execute
345 * without interruption)
346 * @dma: 0 => disable, !0 => enable and set dma engine
348 * This function returns an error code
350 static int hw_device_state(u32 dma)
353 hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma);
354 /* interrupt, error, port change, reset, sleep/suspend */
355 hw_cwrite(CAP_USBINTR, ~0,
356 USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
357 hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS);
359 hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
360 hw_cwrite(CAP_USBINTR, ~0, 0);
366 * hw_ep_flush: flush endpoint fifo (execute without interruption)
367 * @num: endpoint number
368 * @dir: endpoint direction
370 * This function returns an error code
372 static int hw_ep_flush(int num, int dir)
374 int n = hw_ep_bit(num, dir);
377 /* flush any pending transfer */
378 hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n));
379 while (hw_cread(CAP_ENDPTFLUSH, BIT(n)))
381 } while (hw_cread(CAP_ENDPTSTAT, BIT(n)));
387 * hw_ep_disable: disables endpoint (execute without interruption)
388 * @num: endpoint number
389 * @dir: endpoint direction
391 * This function returns an error code
393 static int hw_ep_disable(int num, int dir)
395 hw_ep_flush(num, dir);
396 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32),
397 dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
402 * hw_ep_enable: enables endpoint (execute without interruption)
403 * @num: endpoint number
404 * @dir: endpoint direction
405 * @type: endpoint type
407 * This function returns an error code
409 static int hw_ep_enable(int num, int dir, int type)
414 mask = ENDPTCTRL_TXT; /* type */
415 data = type << ffs_nr(mask);
417 mask |= ENDPTCTRL_TXS; /* unstall */
418 mask |= ENDPTCTRL_TXR; /* reset data toggle */
419 data |= ENDPTCTRL_TXR;
420 mask |= ENDPTCTRL_TXE; /* enable */
421 data |= ENDPTCTRL_TXE;
423 mask = ENDPTCTRL_RXT; /* type */
424 data = type << ffs_nr(mask);
426 mask |= ENDPTCTRL_RXS; /* unstall */
427 mask |= ENDPTCTRL_RXR; /* reset data toggle */
428 data |= ENDPTCTRL_RXR;
429 mask |= ENDPTCTRL_RXE; /* enable */
430 data |= ENDPTCTRL_RXE;
432 hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data);
437 * hw_ep_get_halt: return endpoint halt status
438 * @num: endpoint number
439 * @dir: endpoint direction
441 * This function returns 1 if endpoint halted
443 static int hw_ep_get_halt(int num, int dir)
445 u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
447 return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0;
451 * hw_test_and_clear_setup_status: test & clear setup status (execute without
453 * @n: endpoint number
455 * This function returns setup status
457 static int hw_test_and_clear_setup_status(int n)
460 return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
464 * hw_ep_prime: primes endpoint (execute without interruption)
465 * @num: endpoint number
466 * @dir: endpoint direction
467 * @is_ctrl: true if control endpoint
469 * This function returns an error code
471 static int hw_ep_prime(int num, int dir, int is_ctrl)
473 int n = hw_ep_bit(num, dir);
475 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
478 hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n));
480 while (hw_cread(CAP_ENDPTPRIME, BIT(n)))
482 if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
485 /* status shoult be tested according with manual but it doesn't work */
490 * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
491 * without interruption)
492 * @num: endpoint number
493 * @dir: endpoint direction
494 * @value: true => stall, false => unstall
496 * This function returns an error code
498 static int hw_ep_set_halt(int num, int dir, int value)
500 if (value != 0 && value != 1)
504 u32 addr = CAP_ENDPTCTRL + num * sizeof(u32);
505 u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
506 u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
508 /* data toggle - reserved for EP0 but it's in ESS */
509 hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr);
511 } while (value != hw_ep_get_halt(num, dir));
517 * hw_intr_clear: disables interrupt & clears interrupt status (execute without
521 * This function returns an error code
523 static int hw_intr_clear(int n)
528 hw_cwrite(CAP_USBINTR, BIT(n), 0);
529 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
534 * hw_intr_force: enables interrupt & forces interrupt status (execute without
538 * This function returns an error code
540 static int hw_intr_force(int n)
545 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
546 hw_cwrite(CAP_USBINTR, BIT(n), BIT(n));
547 hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
548 hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, 0);
553 * hw_is_port_high_speed: test if port is high speed
555 * This function returns true if high speed port
557 static int hw_port_is_high_speed(void)
559 return hw_bank.lpm ? hw_cread(CAP_DEVLC, DEVLC_PSPD) :
560 hw_cread(CAP_PORTSC, PORTSC_HSP);
564 * hw_port_test_get: reads port test mode value
566 * This function returns port test mode value
568 static u8 hw_port_test_get(void)
570 return hw_cread(CAP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
574 * hw_port_test_set: writes port test mode (execute without interruption)
577 * This function returns an error code
579 static int hw_port_test_set(u8 mode)
581 const u8 TEST_MODE_MAX = 7;
583 if (mode > TEST_MODE_MAX)
586 hw_cwrite(CAP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
591 * hw_read_intr_enable: returns interrupt enable register
593 * This function returns register data
595 static u32 hw_read_intr_enable(void)
597 return hw_cread(CAP_USBINTR, ~0);
601 * hw_read_intr_status: returns interrupt status register
603 * This function returns register data
605 static u32 hw_read_intr_status(void)
607 return hw_cread(CAP_USBSTS, ~0);
611 * hw_register_read: reads all device registers (execute without interruption)
612 * @buf: destination buffer
615 * This function returns number of registers read
617 static size_t hw_register_read(u32 *buf, size_t size)
621 if (size > hw_bank.size)
624 for (i = 0; i < size; i++)
625 buf[i] = hw_aread(i * sizeof(u32), ~0);
631 * hw_register_write: writes to register
632 * @addr: register address
633 * @data: register value
635 * This function returns an error code
637 static int hw_register_write(u16 addr, u32 data)
642 if (addr >= hw_bank.size)
648 hw_awrite(addr, ~0, data);
653 * hw_test_and_clear_complete: test & clear complete status (execute without
655 * @n: endpoint number
657 * This function returns complete status
659 static int hw_test_and_clear_complete(int n)
662 return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
666 * hw_test_and_clear_intr_active: test & clear active interrupts (execute
667 * without interruption)
669 * This function returns active interrutps
671 static u32 hw_test_and_clear_intr_active(void)
673 u32 reg = hw_read_intr_status() & hw_read_intr_enable();
675 hw_cwrite(CAP_USBSTS, ~0, reg);
680 * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
683 * This function returns guard value
685 static int hw_test_and_clear_setup_guard(void)
687 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, 0);
691 * hw_test_and_set_setup_guard: test & set setup guard (execute without
694 * This function returns guard value
696 static int hw_test_and_set_setup_guard(void)
698 return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
702 * hw_usb_set_address: configures USB address (execute without interruption)
703 * @value: new USB address
705 * This function returns an error code
707 static int hw_usb_set_address(u8 value)
710 hw_cwrite(CAP_DEVICEADDR, DEVICEADDR_USBADR | DEVICEADDR_USBADRA,
711 value << ffs_nr(DEVICEADDR_USBADR) | DEVICEADDR_USBADRA);
716 * hw_usb_reset: restart device after a bus reset (execute without
719 * This function returns an error code
721 static int hw_usb_reset(void)
723 hw_usb_set_address(0);
725 /* ESS flushes only at end?!? */
726 hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); /* flush all EPs */
728 /* clear setup token semaphores */
729 hw_cwrite(CAP_ENDPTSETUPSTAT, 0, 0); /* writes its content */
731 /* clear complete status */
732 hw_cwrite(CAP_ENDPTCOMPLETE, 0, 0); /* writes its content */
734 /* wait until all bits cleared */
735 while (hw_cread(CAP_ENDPTPRIME, ~0))
736 udelay(10); /* not RTOS friendly */
738 /* reset all endpoints ? */
740 /* reset internal status and wait for further instructions
741 no need to verify the port reset status (ESS does it) */
746 /******************************************************************************
748 *****************************************************************************/
750 * show_device: prints information about device capabilities and status
752 * Check "device.h" for details
754 static ssize_t show_device(struct device *dev, struct device_attribute *attr,
757 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
758 struct usb_gadget *gadget = &udc->gadget;
761 dbg_trace("[%s] %p\n", __func__, buf);
762 if (attr == NULL || buf == NULL) {
763 dev_err(dev, "[%s] EINVAL\n", __func__);
767 n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
769 n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed = %d\n",
771 /* TODO: Scheduled for removal in 3.8. */
772 n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
773 gadget_is_dualspeed(gadget));
774 n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
776 n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
777 gadget->is_a_peripheral);
778 n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
779 gadget->b_hnp_enable);
780 n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
781 gadget->a_hnp_support);
782 n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
783 gadget->a_alt_hnp_support);
784 n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
785 (gadget->name ? gadget->name : ""));
789 static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
792 * show_driver: prints information about attached gadget (if any)
794 * Check "device.h" for details
796 static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
799 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
800 struct usb_gadget_driver *driver = udc->driver;
803 dbg_trace("[%s] %p\n", __func__, buf);
804 if (attr == NULL || buf == NULL) {
805 dev_err(dev, "[%s] EINVAL\n", __func__);
810 return scnprintf(buf, PAGE_SIZE,
811 "There is no gadget attached!\n");
813 n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
814 (driver->function ? driver->function : ""));
815 n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
820 static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
822 /* Maximum event message length */
823 #define DBG_DATA_MSG 64UL
825 /* Maximum event messages */
826 #define DBG_DATA_MAX 128UL
828 /* Event buffer descriptor */
830 char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
831 unsigned idx; /* index */
832 unsigned tty; /* print to console? */
833 rwlock_t lck; /* lock */
837 .lck = __RW_LOCK_UNLOCKED(lck)
841 * dbg_dec: decrements debug event index
844 static void dbg_dec(unsigned *idx)
846 *idx = (*idx - 1) & (DBG_DATA_MAX-1);
850 * dbg_inc: increments debug event index
853 static void dbg_inc(unsigned *idx)
855 *idx = (*idx + 1) & (DBG_DATA_MAX-1);
859 * dbg_print: prints the common part of the event
860 * @addr: endpoint address
863 * @extra: extra information
865 static void dbg_print(u8 addr, const char *name, int status, const char *extra)
871 write_lock_irqsave(&dbg_data.lck, flags);
873 do_gettimeofday(&tval);
874 stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
875 stamp = stamp * 1000000 + tval.tv_usec;
877 scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
878 "%04X\t? %02X %-7.7s %4i ?\t%s\n",
879 stamp, addr, name, status, extra);
881 dbg_inc(&dbg_data.idx);
883 write_unlock_irqrestore(&dbg_data.lck, flags);
885 if (dbg_data.tty != 0)
886 pr_notice("%04X\t? %02X %-7.7s %4i ?\t%s\n",
887 stamp, addr, name, status, extra);
891 * dbg_done: prints a DONE event
892 * @addr: endpoint address
893 * @td: transfer descriptor
896 static void dbg_done(u8 addr, const u32 token, int status)
898 char msg[DBG_DATA_MSG];
900 scnprintf(msg, sizeof(msg), "%d %02X",
901 (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
902 (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
903 dbg_print(addr, "DONE", status, msg);
907 * dbg_event: prints a generic event
908 * @addr: endpoint address
912 static void dbg_event(u8 addr, const char *name, int status)
915 dbg_print(addr, name, status, "");
919 * dbg_queue: prints a QUEUE event
920 * @addr: endpoint address
924 static void dbg_queue(u8 addr, const struct usb_request *req, int status)
926 char msg[DBG_DATA_MSG];
929 scnprintf(msg, sizeof(msg),
930 "%d %d", !req->no_interrupt, req->length);
931 dbg_print(addr, "QUEUE", status, msg);
936 * dbg_setup: prints a SETUP event
937 * @addr: endpoint address
938 * @req: setup request
940 static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
942 char msg[DBG_DATA_MSG];
945 scnprintf(msg, sizeof(msg),
946 "%02X %02X %04X %04X %d", req->bRequestType,
947 req->bRequest, le16_to_cpu(req->wValue),
948 le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
949 dbg_print(addr, "SETUP", 0, msg);
954 * show_events: displays the event buffer
956 * Check "device.h" for details
958 static ssize_t show_events(struct device *dev, struct device_attribute *attr,
962 unsigned i, j, n = 0;
964 dbg_trace("[%s] %p\n", __func__, buf);
965 if (attr == NULL || buf == NULL) {
966 dev_err(dev, "[%s] EINVAL\n", __func__);
970 read_lock_irqsave(&dbg_data.lck, flags);
973 for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
974 n += strlen(dbg_data.buf[i]);
975 if (n >= PAGE_SIZE) {
976 n -= strlen(dbg_data.buf[i]);
980 for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
981 j += scnprintf(buf + j, PAGE_SIZE - j,
982 "%s", dbg_data.buf[i]);
984 read_unlock_irqrestore(&dbg_data.lck, flags);
990 * store_events: configure if events are going to be also printed to console
992 * Check "device.h" for details
994 static ssize_t store_events(struct device *dev, struct device_attribute *attr,
995 const char *buf, size_t count)
999 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1000 if (attr == NULL || buf == NULL) {
1001 dev_err(dev, "[%s] EINVAL\n", __func__);
1005 if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
1006 dev_err(dev, "<1|0>: enable|disable console log\n");
1011 dev_info(dev, "tty = %u", dbg_data.tty);
1016 static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
1019 * show_inters: interrupt status, enable status and historic
1021 * Check "device.h" for details
1023 static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
1026 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1027 unsigned long flags;
1029 unsigned i, j, n = 0;
1031 dbg_trace("[%s] %p\n", __func__, buf);
1032 if (attr == NULL || buf == NULL) {
1033 dev_err(dev, "[%s] EINVAL\n", __func__);
1037 spin_lock_irqsave(udc->lock, flags);
1039 n += scnprintf(buf + n, PAGE_SIZE - n,
1040 "status = %08x\n", hw_read_intr_status());
1041 n += scnprintf(buf + n, PAGE_SIZE - n,
1042 "enable = %08x\n", hw_read_intr_enable());
1044 n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
1045 isr_statistics.test);
1046 n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
1048 n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
1049 isr_statistics.uei);
1050 n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
1051 isr_statistics.pci);
1052 n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
1053 isr_statistics.uri);
1054 n += scnprintf(buf + n, PAGE_SIZE - n, "? sli = %d\n",
1055 isr_statistics.sli);
1056 n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
1057 isr_statistics.none);
1058 n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
1059 isr_statistics.hndl.cnt);
1061 for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
1063 intr = isr_statistics.hndl.buf[i];
1066 n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
1068 if (USBi_UEI & intr)
1069 n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
1071 if (USBi_PCI & intr)
1072 n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
1074 if (USBi_URI & intr)
1075 n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
1077 if (USBi_SLI & intr)
1078 n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
1081 n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
1082 if (isr_statistics.hndl.buf[i])
1083 n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
1086 spin_unlock_irqrestore(udc->lock, flags);
1092 * store_inters: enable & force or disable an individual interrutps
1093 * (to be used for test purposes only)
1095 * Check "device.h" for details
1097 static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
1098 const char *buf, size_t count)
1100 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1101 unsigned long flags;
1104 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1105 if (attr == NULL || buf == NULL) {
1106 dev_err(dev, "[%s] EINVAL\n", __func__);
1110 if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
1111 dev_err(dev, "<1|0> <bit>: enable|disable interrupt");
1115 spin_lock_irqsave(udc->lock, flags);
1117 if (hw_intr_force(bit))
1118 dev_err(dev, "invalid bit number\n");
1120 isr_statistics.test++;
1122 if (hw_intr_clear(bit))
1123 dev_err(dev, "invalid bit number\n");
1125 spin_unlock_irqrestore(udc->lock, flags);
1130 static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
1133 * show_port_test: reads port test mode
1135 * Check "device.h" for details
1137 static ssize_t show_port_test(struct device *dev,
1138 struct device_attribute *attr, char *buf)
1140 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1141 unsigned long flags;
1144 dbg_trace("[%s] %p\n", __func__, buf);
1145 if (attr == NULL || buf == NULL) {
1146 dev_err(dev, "[%s] EINVAL\n", __func__);
1150 spin_lock_irqsave(udc->lock, flags);
1151 mode = hw_port_test_get();
1152 spin_unlock_irqrestore(udc->lock, flags);
1154 return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
1158 * store_port_test: writes port test mode
1160 * Check "device.h" for details
1162 static ssize_t store_port_test(struct device *dev,
1163 struct device_attribute *attr,
1164 const char *buf, size_t count)
1166 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1167 unsigned long flags;
1170 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1171 if (attr == NULL || buf == NULL) {
1172 dev_err(dev, "[%s] EINVAL\n", __func__);
1176 if (sscanf(buf, "%u", &mode) != 1) {
1177 dev_err(dev, "<mode>: set port test mode");
1181 spin_lock_irqsave(udc->lock, flags);
1182 if (hw_port_test_set(mode))
1183 dev_err(dev, "invalid mode\n");
1184 spin_unlock_irqrestore(udc->lock, flags);
1189 static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
1190 show_port_test, store_port_test);
1193 * show_qheads: DMA contents of all queue heads
1195 * Check "device.h" for details
1197 static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
1200 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1201 unsigned long flags;
1202 unsigned i, j, n = 0;
1204 dbg_trace("[%s] %p\n", __func__, buf);
1205 if (attr == NULL || buf == NULL) {
1206 dev_err(dev, "[%s] EINVAL\n", __func__);
1210 spin_lock_irqsave(udc->lock, flags);
1211 for (i = 0; i < hw_ep_max/2; i++) {
1212 struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
1213 struct ci13xxx_ep *mEpTx = &udc->ci13xxx_ep[i + hw_ep_max/2];
1214 n += scnprintf(buf + n, PAGE_SIZE - n,
1215 "EP=%02i: RX=%08X TX=%08X\n",
1216 i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.dma);
1217 for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
1218 n += scnprintf(buf + n, PAGE_SIZE - n,
1219 " %04X: %08X %08X\n", j,
1220 *((u32 *)mEpRx->qh.ptr + j),
1221 *((u32 *)mEpTx->qh.ptr + j));
1224 spin_unlock_irqrestore(udc->lock, flags);
1228 static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
1231 * show_registers: dumps all registers
1233 * Check "device.h" for details
1235 #define DUMP_ENTRIES 512
1236 static ssize_t show_registers(struct device *dev,
1237 struct device_attribute *attr, char *buf)
1239 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1240 unsigned long flags;
1242 unsigned i, k, n = 0;
1244 dbg_trace("[%s] %p\n", __func__, buf);
1245 if (attr == NULL || buf == NULL) {
1246 dev_err(dev, "[%s] EINVAL\n", __func__);
1250 dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
1252 dev_err(dev, "%s: out of memory\n", __func__);
1256 spin_lock_irqsave(udc->lock, flags);
1257 k = hw_register_read(dump, DUMP_ENTRIES);
1258 spin_unlock_irqrestore(udc->lock, flags);
1260 for (i = 0; i < k; i++) {
1261 n += scnprintf(buf + n, PAGE_SIZE - n,
1262 "reg[0x%04X] = 0x%08X\n",
1263 i * (unsigned)sizeof(u32), dump[i]);
1271 * store_registers: writes value to register address
1273 * Check "device.h" for details
1275 static ssize_t store_registers(struct device *dev,
1276 struct device_attribute *attr,
1277 const char *buf, size_t count)
1279 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1280 unsigned long addr, data, flags;
1282 dbg_trace("[%s] %p, %d\n", __func__, buf, count);
1283 if (attr == NULL || buf == NULL) {
1284 dev_err(dev, "[%s] EINVAL\n", __func__);
1288 if (sscanf(buf, "%li %li", &addr, &data) != 2) {
1289 dev_err(dev, "<addr> <data>: write data to register address");
1293 spin_lock_irqsave(udc->lock, flags);
1294 if (hw_register_write(addr, data))
1295 dev_err(dev, "invalid address range\n");
1296 spin_unlock_irqrestore(udc->lock, flags);
1301 static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
1302 show_registers, store_registers);
1305 * show_requests: DMA contents of all requests currently queued (all endpts)
1307 * Check "device.h" for details
1309 static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
1312 struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
1313 unsigned long flags;
1314 struct list_head *ptr = NULL;
1315 struct ci13xxx_req *req = NULL;
1316 unsigned i, j, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
1318 dbg_trace("[%s] %p\n", __func__, buf);
1319 if (attr == NULL || buf == NULL) {
1320 dev_err(dev, "[%s] EINVAL\n", __func__);
1324 spin_lock_irqsave(udc->lock, flags);
1325 for (i = 0; i < hw_ep_max; i++)
1326 list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
1328 req = list_entry(ptr, struct ci13xxx_req, queue);
1330 n += scnprintf(buf + n, PAGE_SIZE - n,
1331 "EP=%02i: TD=%08X %s\n",
1332 i % hw_ep_max/2, (u32)req->dma,
1333 ((i < hw_ep_max/2) ? "RX" : "TX"));
1335 for (j = 0; j < qSize; j++)
1336 n += scnprintf(buf + n, PAGE_SIZE - n,
1338 *((u32 *)req->ptr + j));
1340 spin_unlock_irqrestore(udc->lock, flags);
1344 static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
1347 * dbg_create_files: initializes the attribute interface
1350 * This function returns an error code
1352 __maybe_unused static int dbg_create_files(struct device *dev)
1358 retval = device_create_file(dev, &dev_attr_device);
1361 retval = device_create_file(dev, &dev_attr_driver);
1364 retval = device_create_file(dev, &dev_attr_events);
1367 retval = device_create_file(dev, &dev_attr_inters);
1370 retval = device_create_file(dev, &dev_attr_port_test);
1373 retval = device_create_file(dev, &dev_attr_qheads);
1376 retval = device_create_file(dev, &dev_attr_registers);
1379 retval = device_create_file(dev, &dev_attr_requests);
1385 device_remove_file(dev, &dev_attr_registers);
1387 device_remove_file(dev, &dev_attr_qheads);
1389 device_remove_file(dev, &dev_attr_port_test);
1391 device_remove_file(dev, &dev_attr_inters);
1393 device_remove_file(dev, &dev_attr_events);
1395 device_remove_file(dev, &dev_attr_driver);
1397 device_remove_file(dev, &dev_attr_device);
1403 * dbg_remove_files: destroys the attribute interface
1406 * This function returns an error code
1408 __maybe_unused static int dbg_remove_files(struct device *dev)
1412 device_remove_file(dev, &dev_attr_requests);
1413 device_remove_file(dev, &dev_attr_registers);
1414 device_remove_file(dev, &dev_attr_qheads);
1415 device_remove_file(dev, &dev_attr_port_test);
1416 device_remove_file(dev, &dev_attr_inters);
1417 device_remove_file(dev, &dev_attr_events);
1418 device_remove_file(dev, &dev_attr_driver);
1419 device_remove_file(dev, &dev_attr_device);
1423 /******************************************************************************
1425 *****************************************************************************/
1427 * _usb_addr: calculates endpoint address from direction & number
1430 static inline u8 _usb_addr(struct ci13xxx_ep *ep)
1432 return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
1436 * _hardware_queue: configures a request at hardware level
1440 * This function returns an error code
1442 static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1446 unsigned length = mReq->req.length;
1448 trace("%p, %p", mEp, mReq);
1450 /* don't queue twice */
1451 if (mReq->req.status == -EALREADY)
1454 mReq->req.status = -EALREADY;
1455 if (length && mReq->req.dma == DMA_ADDR_INVALID) {
1457 dma_map_single(mEp->device, mReq->req.buf,
1458 length, mEp->dir ? DMA_TO_DEVICE :
1460 if (mReq->req.dma == 0)
1466 if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
1467 mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
1469 if (mReq->zptr == NULL) {
1471 dma_unmap_single(mEp->device, mReq->req.dma,
1472 length, mEp->dir ? DMA_TO_DEVICE :
1474 mReq->req.dma = DMA_ADDR_INVALID;
1479 memset(mReq->zptr, 0, sizeof(*mReq->zptr));
1480 mReq->zptr->next = TD_TERMINATE;
1481 mReq->zptr->token = TD_STATUS_ACTIVE;
1482 if (!mReq->req.no_interrupt)
1483 mReq->zptr->token |= TD_IOC;
1487 * TODO - handle requests which spawns into several TDs
1489 memset(mReq->ptr, 0, sizeof(*mReq->ptr));
1490 mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES);
1491 mReq->ptr->token &= TD_TOTAL_BYTES;
1492 mReq->ptr->token |= TD_STATUS_ACTIVE;
1494 mReq->ptr->next = mReq->zdma;
1496 mReq->ptr->next = TD_TERMINATE;
1497 if (!mReq->req.no_interrupt)
1498 mReq->ptr->token |= TD_IOC;
1500 mReq->ptr->page[0] = mReq->req.dma;
1501 for (i = 1; i < 5; i++)
1502 mReq->ptr->page[i] =
1503 (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
1505 if (!list_empty(&mEp->qh.queue)) {
1506 struct ci13xxx_req *mReqPrev;
1507 int n = hw_ep_bit(mEp->num, mEp->dir);
1510 mReqPrev = list_entry(mEp->qh.queue.prev,
1511 struct ci13xxx_req, queue);
1513 mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
1515 mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
1517 if (hw_cread(CAP_ENDPTPRIME, BIT(n)))
1520 hw_cwrite(CAP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
1521 tmp_stat = hw_cread(CAP_ENDPTSTAT, BIT(n));
1522 } while (!hw_cread(CAP_USBCMD, USBCMD_ATDTW));
1523 hw_cwrite(CAP_USBCMD, USBCMD_ATDTW, 0);
1528 /* QH configuration */
1529 mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
1530 mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
1531 mEp->qh.ptr->cap |= QH_ZLT;
1533 wmb(); /* synchronize before ep prime */
1535 ret = hw_ep_prime(mEp->num, mEp->dir,
1536 mEp->type == USB_ENDPOINT_XFER_CONTROL);
1542 * _hardware_dequeue: handles a request at hardware level
1546 * This function returns an error code
1548 static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
1550 trace("%p, %p", mEp, mReq);
1552 if (mReq->req.status != -EALREADY)
1555 if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
1559 if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
1561 dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
1565 mReq->req.status = 0;
1568 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
1569 mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
1570 mReq->req.dma = DMA_ADDR_INVALID;
1574 mReq->req.status = mReq->ptr->token & TD_STATUS;
1575 if ((TD_STATUS_HALTED & mReq->req.status) != 0)
1576 mReq->req.status = -1;
1577 else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
1578 mReq->req.status = -1;
1579 else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
1580 mReq->req.status = -1;
1582 mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
1583 mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
1584 mReq->req.actual = mReq->req.length - mReq->req.actual;
1585 mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
1587 return mReq->req.actual;
1591 * _ep_nuke: dequeues all endpoint requests
1594 * This function returns an error code
1595 * Caller must hold lock
1597 static int _ep_nuke(struct ci13xxx_ep *mEp)
1598 __releases(mEp->lock)
1599 __acquires(mEp->lock)
1606 hw_ep_flush(mEp->num, mEp->dir);
1608 while (!list_empty(&mEp->qh.queue)) {
1610 /* pop oldest request */
1611 struct ci13xxx_req *mReq = \
1612 list_entry(mEp->qh.queue.next,
1613 struct ci13xxx_req, queue);
1614 list_del_init(&mReq->queue);
1615 mReq->req.status = -ESHUTDOWN;
1617 if (mReq->req.complete != NULL) {
1618 spin_unlock(mEp->lock);
1619 mReq->req.complete(&mEp->ep, &mReq->req);
1620 spin_lock(mEp->lock);
1627 * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
1630 * This function returns an error code
1632 static int _gadget_stop_activity(struct usb_gadget *gadget)
1635 struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
1636 unsigned long flags;
1638 trace("%p", gadget);
1643 spin_lock_irqsave(udc->lock, flags);
1644 udc->gadget.speed = USB_SPEED_UNKNOWN;
1645 udc->remote_wakeup = 0;
1647 spin_unlock_irqrestore(udc->lock, flags);
1649 /* flush all endpoints */
1650 gadget_for_each_ep(ep, gadget) {
1651 usb_ep_fifo_flush(ep);
1653 usb_ep_fifo_flush(&udc->ep0out.ep);
1654 usb_ep_fifo_flush(&udc->ep0in.ep);
1656 udc->driver->disconnect(gadget);
1658 /* make sure to disable all endpoints */
1659 gadget_for_each_ep(ep, gadget) {
1663 if (udc->status != NULL) {
1664 usb_ep_free_request(&udc->ep0in.ep, udc->status);
1671 /******************************************************************************
1673 *****************************************************************************/
1675 * isr_reset_handler: USB reset interrupt handler
1678 * This function resets USB engine after a bus reset occurred
1680 static void isr_reset_handler(struct ci13xxx *udc)
1681 __releases(udc->lock)
1682 __acquires(udc->lock)
1693 dbg_event(0xFF, "BUS RST", 0);
1695 spin_unlock(udc->lock);
1696 retval = _gadget_stop_activity(&udc->gadget);
1700 retval = hw_usb_reset();
1704 udc->status = usb_ep_alloc_request(&udc->ep0in.ep, GFP_ATOMIC);
1705 if (udc->status == NULL)
1708 spin_lock(udc->lock);
1712 err("error: %i", retval);
1716 * isr_get_status_complete: get_status request complete function
1718 * @req: request handled
1720 * Caller must release lock
1722 static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
1724 trace("%p, %p", ep, req);
1726 if (ep == NULL || req == NULL) {
1732 usb_ep_free_request(ep, req);
1736 * isr_get_status_response: get_status request response
1738 * @setup: setup request packet
1740 * This function returns an error code
1742 static int isr_get_status_response(struct ci13xxx *udc,
1743 struct usb_ctrlrequest *setup)
1744 __releases(mEp->lock)
1745 __acquires(mEp->lock)
1747 struct ci13xxx_ep *mEp = &udc->ep0in;
1748 struct usb_request *req = NULL;
1749 gfp_t gfp_flags = GFP_ATOMIC;
1750 int dir, num, retval;
1752 trace("%p, %p", mEp, setup);
1754 if (mEp == NULL || setup == NULL)
1757 spin_unlock(mEp->lock);
1758 req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
1759 spin_lock(mEp->lock);
1763 req->complete = isr_get_status_complete;
1765 req->buf = kzalloc(req->length, gfp_flags);
1766 if (req->buf == NULL) {
1771 if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
1772 /* Assume that device is bus powered for now. */
1773 *((u16 *)req->buf) = _udc->remote_wakeup << 1;
1775 } else if ((setup->bRequestType & USB_RECIP_MASK) \
1776 == USB_RECIP_ENDPOINT) {
1777 dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
1779 num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1780 *((u16 *)req->buf) = hw_ep_get_halt(num, dir);
1782 /* else do nothing; reserved for future use */
1784 spin_unlock(mEp->lock);
1785 retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
1786 spin_lock(mEp->lock);
1795 spin_unlock(mEp->lock);
1796 usb_ep_free_request(&mEp->ep, req);
1797 spin_lock(mEp->lock);
1802 * isr_setup_status_complete: setup_status request complete function
1804 * @req: request handled
1806 * Caller must release lock. Put the port in test mode if test mode
1807 * feature is selected.
1810 isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
1812 struct ci13xxx *udc = req->context;
1813 unsigned long flags;
1815 trace("%p, %p", ep, req);
1817 spin_lock_irqsave(udc->lock, flags);
1819 hw_port_test_set(udc->test_mode);
1820 spin_unlock_irqrestore(udc->lock, flags);
1824 * isr_setup_status_phase: queues the status phase of a setup transation
1827 * This function returns an error code
1829 static int isr_setup_status_phase(struct ci13xxx *udc)
1830 __releases(mEp->lock)
1831 __acquires(mEp->lock)
1834 struct ci13xxx_ep *mEp;
1838 mEp = (udc->ep0_dir == TX) ? &udc->ep0out : &udc->ep0in;
1839 udc->status->context = udc;
1840 udc->status->complete = isr_setup_status_complete;
1842 spin_unlock(mEp->lock);
1843 retval = usb_ep_queue(&mEp->ep, udc->status, GFP_ATOMIC);
1844 spin_lock(mEp->lock);
1850 * isr_tr_complete_low: transaction complete low level handler
1853 * This function returns an error code
1854 * Caller must hold lock
1856 static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
1857 __releases(mEp->lock)
1858 __acquires(mEp->lock)
1860 struct ci13xxx_req *mReq, *mReqTemp;
1861 struct ci13xxx_ep *mEpTemp = mEp;
1862 int uninitialized_var(retval);
1866 if (list_empty(&mEp->qh.queue))
1869 list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
1871 retval = _hardware_dequeue(mEp, mReq);
1874 list_del_init(&mReq->queue);
1875 dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
1876 if (mReq->req.complete != NULL) {
1877 spin_unlock(mEp->lock);
1878 if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
1880 mEpTemp = &_udc->ep0in;
1881 mReq->req.complete(&mEpTemp->ep, &mReq->req);
1882 spin_lock(mEp->lock);
1886 if (retval == -EBUSY)
1889 dbg_event(_usb_addr(mEp), "DONE", retval);
1895 * isr_tr_complete_handler: transaction complete interrupt handler
1896 * @udc: UDC descriptor
1898 * This function handles traffic events
1900 static void isr_tr_complete_handler(struct ci13xxx *udc)
1901 __releases(udc->lock)
1902 __acquires(udc->lock)
1914 for (i = 0; i < hw_ep_max; i++) {
1915 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
1916 int type, num, dir, err = -EINVAL;
1917 struct usb_ctrlrequest req;
1919 if (mEp->desc == NULL)
1920 continue; /* not configured */
1922 if (hw_test_and_clear_complete(i)) {
1923 err = isr_tr_complete_low(mEp);
1924 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
1925 if (err > 0) /* needs status phase */
1926 err = isr_setup_status_phase(udc);
1928 dbg_event(_usb_addr(mEp),
1930 spin_unlock(udc->lock);
1931 if (usb_ep_set_halt(&mEp->ep))
1932 err("error: ep_set_halt");
1933 spin_lock(udc->lock);
1938 if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
1939 !hw_test_and_clear_setup_status(i))
1943 warn("ctrl traffic received at endpoint");
1948 * Flush data and handshake transactions of previous
1951 _ep_nuke(&udc->ep0out);
1952 _ep_nuke(&udc->ep0in);
1954 /* read_setup_packet */
1956 hw_test_and_set_setup_guard();
1957 memcpy(&req, &mEp->qh.ptr->setup, sizeof(req));
1958 } while (!hw_test_and_clear_setup_guard());
1960 type = req.bRequestType;
1962 udc->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
1964 dbg_setup(_usb_addr(mEp), &req);
1966 switch (req.bRequest) {
1967 case USB_REQ_CLEAR_FEATURE:
1968 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
1969 le16_to_cpu(req.wValue) ==
1970 USB_ENDPOINT_HALT) {
1971 if (req.wLength != 0)
1973 num = le16_to_cpu(req.wIndex);
1974 dir = num & USB_ENDPOINT_DIR_MASK;
1975 num &= USB_ENDPOINT_NUMBER_MASK;
1978 if (!udc->ci13xxx_ep[num].wedge) {
1979 spin_unlock(udc->lock);
1980 err = usb_ep_clear_halt(
1981 &udc->ci13xxx_ep[num].ep);
1982 spin_lock(udc->lock);
1986 err = isr_setup_status_phase(udc);
1987 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
1988 le16_to_cpu(req.wValue) ==
1989 USB_DEVICE_REMOTE_WAKEUP) {
1990 if (req.wLength != 0)
1992 udc->remote_wakeup = 0;
1993 err = isr_setup_status_phase(udc);
1998 case USB_REQ_GET_STATUS:
1999 if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
2000 type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
2001 type != (USB_DIR_IN|USB_RECIP_INTERFACE))
2003 if (le16_to_cpu(req.wLength) != 2 ||
2004 le16_to_cpu(req.wValue) != 0)
2006 err = isr_get_status_response(udc, &req);
2008 case USB_REQ_SET_ADDRESS:
2009 if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
2011 if (le16_to_cpu(req.wLength) != 0 ||
2012 le16_to_cpu(req.wIndex) != 0)
2014 err = hw_usb_set_address((u8)le16_to_cpu(req.wValue));
2017 err = isr_setup_status_phase(udc);
2019 case USB_REQ_SET_FEATURE:
2020 if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
2021 le16_to_cpu(req.wValue) ==
2022 USB_ENDPOINT_HALT) {
2023 if (req.wLength != 0)
2025 num = le16_to_cpu(req.wIndex);
2026 dir = num & USB_ENDPOINT_DIR_MASK;
2027 num &= USB_ENDPOINT_NUMBER_MASK;
2031 spin_unlock(udc->lock);
2032 err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
2033 spin_lock(udc->lock);
2035 isr_setup_status_phase(udc);
2036 } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
2037 if (req.wLength != 0)
2039 switch (le16_to_cpu(req.wValue)) {
2040 case USB_DEVICE_REMOTE_WAKEUP:
2041 udc->remote_wakeup = 1;
2042 err = isr_setup_status_phase(udc);
2044 case USB_DEVICE_TEST_MODE:
2045 tmode = le16_to_cpu(req.wIndex) >> 8;
2052 udc->test_mode = tmode;
2053 err = isr_setup_status_phase(
2068 if (req.wLength == 0) /* no data phase */
2071 spin_unlock(udc->lock);
2072 err = udc->driver->setup(&udc->gadget, &req);
2073 spin_lock(udc->lock);
2078 dbg_event(_usb_addr(mEp), "ERROR", err);
2080 spin_unlock(udc->lock);
2081 if (usb_ep_set_halt(&mEp->ep))
2082 err("error: ep_set_halt");
2083 spin_lock(udc->lock);
2088 /******************************************************************************
2090 *****************************************************************************/
2092 * ep_enable: configure endpoint, making it usable
2094 * Check usb_ep_enable() at "usb_gadget.h" for details
2096 static int ep_enable(struct usb_ep *ep,
2097 const struct usb_endpoint_descriptor *desc)
2099 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2101 unsigned long flags;
2103 trace("%p, %p", ep, desc);
2105 if (ep == NULL || desc == NULL)
2108 spin_lock_irqsave(mEp->lock, flags);
2110 /* only internal SW should enable ctrl endpts */
2114 if (!list_empty(&mEp->qh.queue))
2115 warn("enabling a non-empty endpoint!");
2117 mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
2118 mEp->num = usb_endpoint_num(desc);
2119 mEp->type = usb_endpoint_type(desc);
2121 mEp->ep.maxpacket = usb_endpoint_maxp(desc);
2123 dbg_event(_usb_addr(mEp), "ENABLE", 0);
2125 mEp->qh.ptr->cap = 0;
2127 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2128 mEp->qh.ptr->cap |= QH_IOS;
2129 else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
2130 mEp->qh.ptr->cap &= ~QH_MULT;
2132 mEp->qh.ptr->cap &= ~QH_ZLT;
2135 (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
2136 mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */
2139 * Enable endpoints in the HW other than ep0 as ep0
2143 retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
2145 spin_unlock_irqrestore(mEp->lock, flags);
2150 * ep_disable: endpoint is no longer usable
2152 * Check usb_ep_disable() at "usb_gadget.h" for details
2154 static int ep_disable(struct usb_ep *ep)
2156 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2157 int direction, retval = 0;
2158 unsigned long flags;
2164 else if (mEp->desc == NULL)
2167 spin_lock_irqsave(mEp->lock, flags);
2169 /* only internal SW should disable ctrl endpts */
2171 direction = mEp->dir;
2173 dbg_event(_usb_addr(mEp), "DISABLE", 0);
2175 retval |= _ep_nuke(mEp);
2176 retval |= hw_ep_disable(mEp->num, mEp->dir);
2178 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2179 mEp->dir = (mEp->dir == TX) ? RX : TX;
2181 } while (mEp->dir != direction);
2184 mEp->ep.desc = NULL;
2186 spin_unlock_irqrestore(mEp->lock, flags);
2191 * ep_alloc_request: allocate a request object to use with this endpoint
2193 * Check usb_ep_alloc_request() at "usb_gadget.h" for details
2195 static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
2197 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2198 struct ci13xxx_req *mReq = NULL;
2200 trace("%p, %i", ep, gfp_flags);
2207 mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
2209 INIT_LIST_HEAD(&mReq->queue);
2210 mReq->req.dma = DMA_ADDR_INVALID;
2212 mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
2214 if (mReq->ptr == NULL) {
2220 dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
2222 return (mReq == NULL) ? NULL : &mReq->req;
2226 * ep_free_request: frees a request object
2228 * Check usb_ep_free_request() at "usb_gadget.h" for details
2230 static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
2232 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2233 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2234 unsigned long flags;
2236 trace("%p, %p", ep, req);
2238 if (ep == NULL || req == NULL) {
2241 } else if (!list_empty(&mReq->queue)) {
2246 spin_lock_irqsave(mEp->lock, flags);
2249 dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
2252 dbg_event(_usb_addr(mEp), "FREE", 0);
2254 spin_unlock_irqrestore(mEp->lock, flags);
2258 * ep_queue: queues (submits) an I/O request to an endpoint
2260 * Check usb_ep_queue()* at usb_gadget.h" for details
2262 static int ep_queue(struct usb_ep *ep, struct usb_request *req,
2263 gfp_t __maybe_unused gfp_flags)
2265 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2266 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2268 unsigned long flags;
2270 trace("%p, %p, %X", ep, req, gfp_flags);
2272 if (ep == NULL || req == NULL || mEp->desc == NULL)
2275 spin_lock_irqsave(mEp->lock, flags);
2277 if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
2279 mEp = (_udc->ep0_dir == RX) ?
2280 &_udc->ep0out : &_udc->ep0in;
2281 if (!list_empty(&mEp->qh.queue)) {
2283 retval = -EOVERFLOW;
2284 warn("endpoint ctrl %X nuked", _usb_addr(mEp));
2288 /* first nuke then test link, e.g. previous status has not sent */
2289 if (!list_empty(&mReq->queue)) {
2291 err("request already in queue");
2295 if (req->length > (4 * CI13XXX_PAGE_SIZE)) {
2296 req->length = (4 * CI13XXX_PAGE_SIZE);
2298 warn("request length truncated");
2301 dbg_queue(_usb_addr(mEp), req, retval);
2304 mReq->req.status = -EINPROGRESS;
2305 mReq->req.actual = 0;
2307 retval = _hardware_enqueue(mEp, mReq);
2309 if (retval == -EALREADY) {
2310 dbg_event(_usb_addr(mEp), "QUEUE", retval);
2314 list_add_tail(&mReq->queue, &mEp->qh.queue);
2317 spin_unlock_irqrestore(mEp->lock, flags);
2322 * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
2324 * Check usb_ep_dequeue() at "usb_gadget.h" for details
2326 static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
2328 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2329 struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
2330 unsigned long flags;
2332 trace("%p, %p", ep, req);
2334 if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
2335 mEp->desc == NULL || list_empty(&mReq->queue) ||
2336 list_empty(&mEp->qh.queue))
2339 spin_lock_irqsave(mEp->lock, flags);
2341 dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
2343 hw_ep_flush(mEp->num, mEp->dir);
2346 list_del_init(&mReq->queue);
2348 dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
2349 mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
2350 mReq->req.dma = DMA_ADDR_INVALID;
2353 req->status = -ECONNRESET;
2355 if (mReq->req.complete != NULL) {
2356 spin_unlock(mEp->lock);
2357 mReq->req.complete(&mEp->ep, &mReq->req);
2358 spin_lock(mEp->lock);
2361 spin_unlock_irqrestore(mEp->lock, flags);
2366 * ep_set_halt: sets the endpoint halt feature
2368 * Check usb_ep_set_halt() at "usb_gadget.h" for details
2370 static int ep_set_halt(struct usb_ep *ep, int value)
2372 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2373 int direction, retval = 0;
2374 unsigned long flags;
2376 trace("%p, %i", ep, value);
2378 if (ep == NULL || mEp->desc == NULL)
2381 spin_lock_irqsave(mEp->lock, flags);
2384 /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
2385 if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
2386 !list_empty(&mEp->qh.queue)) {
2387 spin_unlock_irqrestore(mEp->lock, flags);
2392 direction = mEp->dir;
2394 dbg_event(_usb_addr(mEp), "HALT", value);
2395 retval |= hw_ep_set_halt(mEp->num, mEp->dir, value);
2400 if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
2401 mEp->dir = (mEp->dir == TX) ? RX : TX;
2403 } while (mEp->dir != direction);
2405 spin_unlock_irqrestore(mEp->lock, flags);
2410 * ep_set_wedge: sets the halt feature and ignores clear requests
2412 * Check usb_ep_set_wedge() at "usb_gadget.h" for details
2414 static int ep_set_wedge(struct usb_ep *ep)
2416 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2417 unsigned long flags;
2421 if (ep == NULL || mEp->desc == NULL)
2424 spin_lock_irqsave(mEp->lock, flags);
2426 dbg_event(_usb_addr(mEp), "WEDGE", 0);
2429 spin_unlock_irqrestore(mEp->lock, flags);
2431 return usb_ep_set_halt(ep);
2435 * ep_fifo_flush: flushes contents of a fifo
2437 * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
2439 static void ep_fifo_flush(struct usb_ep *ep)
2441 struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
2442 unsigned long flags;
2447 err("%02X: -EINVAL", _usb_addr(mEp));
2451 spin_lock_irqsave(mEp->lock, flags);
2453 dbg_event(_usb_addr(mEp), "FFLUSH", 0);
2454 hw_ep_flush(mEp->num, mEp->dir);
2456 spin_unlock_irqrestore(mEp->lock, flags);
2460 * Endpoint-specific part of the API to the USB controller hardware
2461 * Check "usb_gadget.h" for details
2463 static const struct usb_ep_ops usb_ep_ops = {
2464 .enable = ep_enable,
2465 .disable = ep_disable,
2466 .alloc_request = ep_alloc_request,
2467 .free_request = ep_free_request,
2469 .dequeue = ep_dequeue,
2470 .set_halt = ep_set_halt,
2471 .set_wedge = ep_set_wedge,
2472 .fifo_flush = ep_fifo_flush,
2475 /******************************************************************************
2477 *****************************************************************************/
2478 static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
2480 struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
2481 unsigned long flags;
2482 int gadget_ready = 0;
2484 if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS))
2487 spin_lock_irqsave(udc->lock, flags);
2488 udc->vbus_active = is_active;
2491 spin_unlock_irqrestore(udc->lock, flags);
2495 pm_runtime_get_sync(&_gadget->dev);
2496 hw_device_reset(udc);
2497 hw_device_state(udc->ep0out.qh.dma);
2500 if (udc->udc_driver->notify_event)
2501 udc->udc_driver->notify_event(udc,
2502 CI13XXX_CONTROLLER_STOPPED_EVENT);
2503 _gadget_stop_activity(&udc->gadget);
2504 pm_runtime_put_sync(&_gadget->dev);
2511 static int ci13xxx_wakeup(struct usb_gadget *_gadget)
2513 struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
2514 unsigned long flags;
2519 spin_lock_irqsave(udc->lock, flags);
2520 if (!udc->remote_wakeup) {
2522 trace("remote wakeup feature is not enabled\n");
2525 if (!hw_cread(CAP_PORTSC, PORTSC_SUSP)) {
2527 trace("port is not suspended\n");
2530 hw_cwrite(CAP_PORTSC, PORTSC_FPR, PORTSC_FPR);
2532 spin_unlock_irqrestore(udc->lock, flags);
2536 static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
2538 struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
2540 if (udc->transceiver)
2541 return usb_phy_set_power(udc->transceiver, mA);
2545 static int ci13xxx_start(struct usb_gadget_driver *driver,
2546 int (*bind)(struct usb_gadget *));
2547 static int ci13xxx_stop(struct usb_gadget_driver *driver);
2549 * Device operations part of the API to the USB controller hardware,
2550 * which don't involve endpoints (or i/o)
2551 * Check "usb_gadget.h" for details
2553 static const struct usb_gadget_ops usb_gadget_ops = {
2554 .vbus_session = ci13xxx_vbus_session,
2555 .wakeup = ci13xxx_wakeup,
2556 .vbus_draw = ci13xxx_vbus_draw,
2557 .start = ci13xxx_start,
2558 .stop = ci13xxx_stop,
2562 * ci13xxx_start: register a gadget driver
2563 * @driver: the driver being registered
2564 * @bind: the driver's bind callback
2566 * Check ci13xxx_start() at <linux/usb/gadget.h> for details.
2567 * Interrupts are enabled here.
2569 static int ci13xxx_start(struct usb_gadget_driver *driver,
2570 int (*bind)(struct usb_gadget *))
2572 struct ci13xxx *udc = _udc;
2573 unsigned long flags;
2575 int retval = -ENOMEM;
2577 trace("%p", driver);
2579 if (driver == NULL ||
2581 driver->setup == NULL ||
2582 driver->disconnect == NULL)
2584 else if (udc == NULL)
2586 else if (udc->driver != NULL)
2589 /* alloc resources */
2590 udc->qh_pool = dma_pool_create("ci13xxx_qh", &udc->gadget.dev,
2591 sizeof(struct ci13xxx_qh),
2592 64, CI13XXX_PAGE_SIZE);
2593 if (udc->qh_pool == NULL)
2596 udc->td_pool = dma_pool_create("ci13xxx_td", &udc->gadget.dev,
2597 sizeof(struct ci13xxx_td),
2598 64, CI13XXX_PAGE_SIZE);
2599 if (udc->td_pool == NULL) {
2600 dma_pool_destroy(udc->qh_pool);
2601 udc->qh_pool = NULL;
2605 spin_lock_irqsave(udc->lock, flags);
2607 info("hw_ep_max = %d", hw_ep_max);
2609 udc->gadget.dev.driver = NULL;
2612 for (i = 0; i < hw_ep_max/2; i++) {
2613 for (j = RX; j <= TX; j++) {
2614 int k = i + j * hw_ep_max/2;
2615 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[k];
2617 scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i,
2618 (j == TX) ? "in" : "out");
2620 mEp->lock = udc->lock;
2621 mEp->device = &udc->gadget.dev;
2622 mEp->td_pool = udc->td_pool;
2624 mEp->ep.name = mEp->name;
2625 mEp->ep.ops = &usb_ep_ops;
2626 mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
2628 INIT_LIST_HEAD(&mEp->qh.queue);
2629 spin_unlock_irqrestore(udc->lock, flags);
2630 mEp->qh.ptr = dma_pool_alloc(udc->qh_pool, GFP_KERNEL,
2632 spin_lock_irqsave(udc->lock, flags);
2633 if (mEp->qh.ptr == NULL)
2636 memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr));
2638 /* skip ep0 out and in endpoints */
2642 list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
2647 spin_unlock_irqrestore(udc->lock, flags);
2648 udc->ep0out.ep.desc = &ctrl_endpt_out_desc;
2649 retval = usb_ep_enable(&udc->ep0out.ep);
2653 udc->ep0in.ep.desc = &ctrl_endpt_in_desc;
2654 retval = usb_ep_enable(&udc->ep0in.ep);
2657 spin_lock_irqsave(udc->lock, flags);
2659 udc->gadget.ep0 = &udc->ep0in.ep;
2661 driver->driver.bus = NULL;
2662 udc->gadget.dev.driver = &driver->driver;
2664 spin_unlock_irqrestore(udc->lock, flags);
2665 retval = bind(&udc->gadget); /* MAY SLEEP */
2666 spin_lock_irqsave(udc->lock, flags);
2669 udc->gadget.dev.driver = NULL;
2673 udc->driver = driver;
2674 pm_runtime_get_sync(&udc->gadget.dev);
2675 if (udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) {
2676 if (udc->vbus_active) {
2677 if (udc->udc_driver->flags & CI13XXX_REGS_SHARED)
2678 hw_device_reset(udc);
2680 pm_runtime_put_sync(&udc->gadget.dev);
2685 retval = hw_device_state(udc->ep0out.qh.dma);
2687 pm_runtime_put_sync(&udc->gadget.dev);
2690 spin_unlock_irqrestore(udc->lock, flags);
2695 * ci13xxx_stop: unregister a gadget driver
2697 * Check usb_gadget_unregister_driver() at "usb_gadget.h" for details
2699 static int ci13xxx_stop(struct usb_gadget_driver *driver)
2701 struct ci13xxx *udc = _udc;
2702 unsigned long i, flags;
2704 trace("%p", driver);
2706 if (driver == NULL ||
2707 driver->unbind == NULL ||
2708 driver->setup == NULL ||
2709 driver->disconnect == NULL ||
2710 driver != udc->driver)
2713 spin_lock_irqsave(udc->lock, flags);
2715 if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) ||
2718 if (udc->udc_driver->notify_event)
2719 udc->udc_driver->notify_event(udc,
2720 CI13XXX_CONTROLLER_STOPPED_EVENT);
2721 spin_unlock_irqrestore(udc->lock, flags);
2722 _gadget_stop_activity(&udc->gadget);
2723 spin_lock_irqsave(udc->lock, flags);
2724 pm_runtime_put(&udc->gadget.dev);
2728 spin_unlock_irqrestore(udc->lock, flags);
2729 driver->unbind(&udc->gadget); /* MAY SLEEP */
2730 spin_lock_irqsave(udc->lock, flags);
2732 udc->gadget.dev.driver = NULL;
2734 /* free resources */
2735 for (i = 0; i < hw_ep_max; i++) {
2736 struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
2738 if (!list_empty(&mEp->ep.ep_list))
2739 list_del_init(&mEp->ep.ep_list);
2741 if (mEp->qh.ptr != NULL)
2742 dma_pool_free(udc->qh_pool, mEp->qh.ptr, mEp->qh.dma);
2745 udc->gadget.ep0 = NULL;
2748 spin_unlock_irqrestore(udc->lock, flags);
2750 if (udc->td_pool != NULL) {
2751 dma_pool_destroy(udc->td_pool);
2752 udc->td_pool = NULL;
2754 if (udc->qh_pool != NULL) {
2755 dma_pool_destroy(udc->qh_pool);
2756 udc->qh_pool = NULL;
2762 /******************************************************************************
2764 *****************************************************************************/
2766 * udc_irq: global interrupt handler
2768 * This function returns IRQ_HANDLED if the IRQ has been handled
2769 * It locks access to registers
2771 static irqreturn_t udc_irq(void)
2773 struct ci13xxx *udc = _udc;
2784 spin_lock(udc->lock);
2786 if (udc->udc_driver->flags & CI13XXX_REGS_SHARED) {
2787 if (hw_cread(CAP_USBMODE, USBMODE_CM) !=
2788 USBMODE_CM_DEVICE) {
2789 spin_unlock(udc->lock);
2793 intr = hw_test_and_clear_intr_active();
2795 isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
2796 isr_statistics.hndl.idx &= ISR_MASK;
2797 isr_statistics.hndl.cnt++;
2799 /* order defines priority - do NOT change it */
2800 if (USBi_URI & intr) {
2801 isr_statistics.uri++;
2802 isr_reset_handler(udc);
2804 if (USBi_PCI & intr) {
2805 isr_statistics.pci++;
2806 udc->gadget.speed = hw_port_is_high_speed() ?
2807 USB_SPEED_HIGH : USB_SPEED_FULL;
2808 if (udc->suspended && udc->driver->resume) {
2809 spin_unlock(udc->lock);
2810 udc->driver->resume(&udc->gadget);
2811 spin_lock(udc->lock);
2815 if (USBi_UEI & intr)
2816 isr_statistics.uei++;
2817 if (USBi_UI & intr) {
2818 isr_statistics.ui++;
2819 isr_tr_complete_handler(udc);
2821 if (USBi_SLI & intr) {
2822 if (udc->gadget.speed != USB_SPEED_UNKNOWN &&
2823 udc->driver->suspend) {
2825 spin_unlock(udc->lock);
2826 udc->driver->suspend(&udc->gadget);
2827 spin_lock(udc->lock);
2829 isr_statistics.sli++;
2831 retval = IRQ_HANDLED;
2833 isr_statistics.none++;
2836 spin_unlock(udc->lock);
2842 * udc_release: driver release function
2845 * Currently does nothing
2847 static void udc_release(struct device *dev)
2856 * udc_probe: parent probe must call this to initialize UDC
2857 * @dev: parent device
2858 * @regs: registers base address
2859 * @name: driver name
2861 * This function returns an error code
2862 * No interrupts active, the IRQ has not been requested yet
2863 * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
2865 static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
2868 struct ci13xxx *udc;
2871 trace("%p, %p, %p", dev, regs, driver->name);
2873 if (dev == NULL || regs == NULL || driver == NULL ||
2874 driver->name == NULL)
2877 udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
2881 udc->lock = &udc_lock;
2883 udc->udc_driver = driver;
2885 udc->gadget.ops = &usb_gadget_ops;
2886 udc->gadget.speed = USB_SPEED_UNKNOWN;
2887 udc->gadget.max_speed = USB_SPEED_HIGH;
2888 udc->gadget.is_otg = 0;
2889 udc->gadget.name = driver->name;
2891 INIT_LIST_HEAD(&udc->gadget.ep_list);
2892 udc->gadget.ep0 = NULL;
2894 dev_set_name(&udc->gadget.dev, "gadget");
2895 udc->gadget.dev.dma_mask = dev->dma_mask;
2896 udc->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask;
2897 udc->gadget.dev.parent = dev;
2898 udc->gadget.dev.release = udc_release;
2900 retval = hw_device_init(regs);
2904 udc->transceiver = usb_get_transceiver();
2906 if (udc->udc_driver->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
2907 if (udc->transceiver == NULL) {
2913 if (!(udc->udc_driver->flags & CI13XXX_REGS_SHARED)) {
2914 retval = hw_device_reset(udc);
2916 goto put_transceiver;
2919 retval = device_register(&udc->gadget.dev);
2921 put_device(&udc->gadget.dev);
2922 goto put_transceiver;
2925 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2926 retval = dbg_create_files(&udc->gadget.dev);
2931 if (udc->transceiver) {
2932 retval = otg_set_peripheral(udc->transceiver->otg,
2938 retval = usb_add_gadget_udc(dev, &udc->gadget);
2942 pm_runtime_no_callbacks(&udc->gadget.dev);
2943 pm_runtime_enable(&udc->gadget.dev);
2949 if (udc->transceiver) {
2950 otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
2951 usb_put_transceiver(udc->transceiver);
2954 err("error = %i", retval);
2956 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2957 dbg_remove_files(&udc->gadget.dev);
2960 device_unregister(&udc->gadget.dev);
2962 if (udc->transceiver)
2963 usb_put_transceiver(udc->transceiver);
2971 * udc_remove: parent remove must call this to remove UDC
2973 * No interrupts active, the IRQ has been released
2975 static void udc_remove(void)
2977 struct ci13xxx *udc = _udc;
2983 usb_del_gadget_udc(&udc->gadget);
2985 if (udc->transceiver) {
2986 otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
2987 usb_put_transceiver(udc->transceiver);
2989 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
2990 dbg_remove_files(&udc->gadget.dev);
2992 device_unregister(&udc->gadget.dev);