4 * This file is part of BeRTOS.
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29 * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
33 * \brief STM32 USB driver
35 * \author Andrea Righi <arighi@develer.com>
38 #include "cfg/cfg_usb.h"
40 #define LOG_LEVEL USB_LOG_LEVEL
41 #define LOG_FORMAT USB_LOG_FORMAT
44 #include <cfg/debug.h>
45 #include <cfg/macros.h>
46 #include <cfg/module.h>
49 #include <cpu/power.h>
51 #include <drv/irq_cm3.h>
52 #include <drv/gpio_stm32.h>
53 #include <drv/clock_stm32.h>
54 #include <drv/timer.h>
57 #include <string.h> /* memcpy() */
59 #include "usb_stm32.h"
61 #define ALIGNED(x) __attribute__ ((__aligned__(x)))
62 #define ALIGN_UP(value, align) (((value) & ((align) - 1)) ? \
63 (((value) + ((align) - 1)) & ~((align) - 1)) : \
66 /* XXX: redefine this to make it usable within C expression */
67 #define _MIN(a,b) (((a) < (b)) ? (a) : (b))
69 /* STM32 USB registers */
80 reg32_t __reserved[8];
88 /* Hardware registers */
89 static struct stm32_usb *usb = (struct stm32_usb *)USB_BASE_ADDR;
91 /* Endpoint descriptors: used for handling requests to use with endpoints */
92 static stm32_UsbEp ep_cnfg[ENP_MAX_NUMB];
94 /* USB EP0 control descriptor */
95 static const UsbEndpointDesc USB_CtrlEpDescr0 =
97 .bLength = sizeof(USB_CtrlEpDescr0),
98 .bDescriptorType = USB_DT_ENDPOINT,
99 .bEndpointAddress = USB_DIR_OUT | 0,
100 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
101 .wMaxPacketSize = USB_EP0_MAX_SIZE,
105 /* USB EP1 control descriptor */
106 static const UsbEndpointDesc USB_CtrlEpDescr1 =
108 .bLength = sizeof(USB_CtrlEpDescr1),
109 .bDescriptorType = USB_DT_ENDPOINT,
110 .bEndpointAddress = USB_DIR_IN | 0,
111 .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
112 .wMaxPacketSize = USB_EP0_MAX_SIZE,
116 /* USB setup packet */
117 static UsbCtrlRequest setup_packet;
119 /* USB device controller: max supported interfaces */
120 #define USB_MAX_INTERFACE 1
122 /* USB device controller features */
123 #define STM32_UDC_FEATURE_SELFPOWERED BV(0)
124 #define STM32_UDC_FEATURE_REMOTE_WAKEUP BV(1)
126 /* Hardware-specific USB device controller structure */
127 typedef struct stm32_udc
131 const UsbConfigDesc *cfg;
133 uint32_t alt[USB_MAX_INTERFACE];
136 } PACKED stm32_udc_t;
138 /* Hardware-specific USB Device Controller */
139 static stm32_udc_t udc;
141 /* Generic USB Device Controller structure */
142 static UsbDevice *usb_dev;
144 /* USB packet memory management: list of allocated chunks */
145 static stm32_UsbMemSlot *mem_use;
147 /* USB packet memory management: memory buffer metadata */
148 #define EP_MAX_SLOTS 16
149 static stm32_UsbMemSlot memory_buffer[EP_MAX_SLOTS];
151 /* Endpoint TX and RX buffers */
153 /* XXX: use the empty cond section to silent a buggy doxygen warning */
154 static bool rx_done, tx_done;
155 static size_t rx_size, tx_size;
156 static uint8_t ep_buffer[_MIN(CONFIG_USB_BUFSIZE, USB_XFER_MAX_SIZE)] ALIGNED(4);
159 /* Allocate a free block of the packet memory */
160 static stm32_UsbMemSlot *usb_malloc(void)
164 for (i = 0; i < countof(memory_buffer); i++)
165 if (memory_buffer[i].Size == 0)
166 return &memory_buffer[i];
170 /* Release a block of the packet memory */
171 static void usb_free(stm32_UsbMemSlot *pPntr)
176 /* Allocate a free chunk of the packet memory (inside a block) */
177 static bool usb_alloc_buffer(uint16_t *pOffset, uint32_t *size,
180 stm32_UsbMemSlot *mem = mem_use,
181 *memNext, *mem_useNew;
182 uint32_t max_size = *size;
185 * Packet size alignment:
186 * - fine-granularity allocation: size alignment by 2;
187 * - coarse-granularity allocation: size alignment by 32.
190 max_size = ALIGN_UP(max_size, 2);
192 max_size = ALIGN_UP(max_size, 32);
194 * Finding free memory chunks from the allocated blocks of the USB
200 /* Offset alignment by 4 */
201 *pOffset = ALIGN_UP(mem->Start + mem->Size, 4);
203 if ((mem->next == NULL) ||
205 *pOffset + max_size))
209 /* Check for out-of-memory condition */
210 if ((*pOffset + max_size) >= USB_BDT_OFFSET)
213 * Allocate a new memory block, next to the last allocated block.
215 mem_useNew = usb_malloc();
216 if (mem_useNew == NULL)
218 /* Insert the block to the list of allocated blocks */
221 mem_use = mem_useNew;
222 mem_use->next = NULL;
226 mem_useNew->next = mem->next;
227 mem->next = mem_useNew;
229 /* Update block's metadata */
230 mem_useNew->ep_addr = EndPoint;
231 mem_useNew->Start = *pOffset;
232 mem_useNew->Size = max_size;
239 /* Release a chunk of the packet memory (inside a block) */
240 static void usb_free_buffer(int EndPoint)
242 stm32_UsbMemSlot *mem, *memPrev = NULL;
247 if (mem->ep_addr == EndPoint)
249 if (UNLIKELY(memPrev == NULL))
251 /* Free the first element of the list */
252 mem_use = mem_use->next;
257 memPrev->next = mem->next;
266 /*-------------------------------------------------------------------------*/
268 /* Connect USB controller */
269 static void usb_connect(void)
271 stm32_gpioPinWrite((struct stm32_gpio *)GPIOC_BASE, 1 << 11, 0);
274 /* Set USB device address */
275 static void usb_set_address(uint32_t addr)
277 usb->DADDR = addr | 0x80;
280 /* Suspend USB controller */
281 static void usb_suspend(void)
283 usb->CNTR |= bmFSUSP | bmLPMODE;
286 /* Resume USB controller */
287 static void usb_resume(void)
289 uint32_t line_status;
291 line_status = usb->FNR & 0xc000;
294 /* check for noise and eventually return to sleep */
295 if (line_status == 0xc000)
298 usb->CNTR &= ~(bmFSUSP | bmLPMODE);
301 /* Convert logical EP address to physical EP address */
302 static int usb_ep_logical_to_hw(uint8_t ep_addr)
304 int addr = (ep_addr & 0x0f) << 1;
305 return (ep_addr & 0x80) ? addr + 1 : addr;
309 static void ep_ctrl_set_ea(reg32_t *reg, uint32_t val)
312 val |= *reg & 0x0700;
313 val |= USB_CTRL_CLEAR_ONLY_MASK;
317 /* Get EP IN status */
318 static uint32_t ep_ctrl_get_stat_tx(reg32_t *reg)
320 return (*reg & (0x3UL << 4)) >> 4;
323 /* Set EP IN state */
324 static void ep_ctrl_set_stat_tx(reg32_t *reg, stm32_UsbEpState val)
330 * The EP can change state between read and write operations from VALID
331 * to NAK and result of set operation will be invalid.
333 for (i = 0; i < 2; i++)
335 if (ep_ctrl_get_stat_tx(reg) == val)
340 state |= USB_CTRL_CLEAR_ONLY_MASK;
341 /* Clear the toggle bits without STAT_TX (4,5) */
347 /* Set EP DTOG_TX bit (IN) */
348 static void ep_ctrl_set_dtog_tx(reg32_t *reg, uint32_t val)
350 val = val ? (*reg ^ (1UL << 6)) : *reg;
351 /* Clear the toggle bits without DTOG_TX (6) */
353 val |= USB_CTRL_CLEAR_ONLY_MASK;
357 /* Clear EP CTR_TX bit (IN) */
358 static void ep_ctrl_clr_ctr_tx(reg32_t *reg)
362 val &= ~(USB_CTRL_TOGGLE_MASK | 1UL << 7);
368 /* Clear EP CTR_RX bit (OUT) */
369 static void ep_ctrl_clr_ctr_rx(reg32_t *reg)
372 val &= ~(USB_CTRL_TOGGLE_MASK | 1UL << 15);
378 /* Set EP KIND bit */
379 static void ep_ctrl_set_ep_kind(reg32_t *reg, uint32_t val)
381 val = val ? (1UL << 8) : 0;
382 val |= *reg & ~(USB_CTRL_TOGGLE_MASK | (1UL << 8));
383 val |= USB_CTRL_CLEAR_ONLY_MASK;
388 static int ep_ctrl_set_ep_type(reg32_t *reg, uint8_t val)
392 if (UNLIKELY(val >= EP_TYPE_MAX))
395 return USB_INVAL_ERROR;
399 type |= *reg & ~(USB_CTRL_TOGGLE_MASK | (0x3UL << 9));
400 type |= USB_CTRL_CLEAR_ONLY_MASK;
406 /* Get EP STAT_RX (OUT) */
407 static uint32_t ep_ctrl_get_stat_rx(reg32_t *reg)
409 uint32_t val = *reg & (0x3UL << 12);
413 /* Set EP STAT_RX (OUT) */
414 static void ep_ctrl_set_stat_rx(reg32_t *reg, stm32_UsbEpState val)
420 * The EP can change state between read and write operations from VALID
421 * to NAK and result of set operation will be invalid.
423 for (i = 0; i < 2; i++)
425 if (ep_ctrl_get_stat_rx(reg) == val)
430 state |= USB_CTRL_CLEAR_ONLY_MASK;
431 /* Clear the toggle bits without STAT_RX (12,13) */
437 /* Set DTOG_RX bit */
438 static void ep_ctrl_set_dtog_rx(reg32_t *reg, uint32_t val)
440 val = val ? (*reg ^ (1UL << 14)) : *reg;
441 /* Clear the toggle bits without DTOG_RX (14) */
443 val |= USB_CTRL_CLEAR_ONLY_MASK;
447 /* Get EP SETUP bit */
448 static uint32_t ep_ctrl_get_setup(reg32_t *reg)
450 uint32_t val = *reg & (1UL << 11);
454 /* Core endpoint I/O function */
455 static void __usb_ep_io(int EP)
457 ssize_t Count, CountHold, Offset;
458 uint32_t *pDst, *pSrc, Data;
459 stm32_UsbEp *epd = &ep_cnfg[EP];
461 if (UNLIKELY(epd->hw == NULL))
463 LOG_ERR("%s: invalid endpoint (EP%d-%s)\n",
466 (EP & 0x01) ? "IN" : "OUT");
470 if (epd->status != BEGIN_SERVICED && epd->status != NO_SERVICED)
476 Count = epd->size - epd->offset;
477 while (epd->avail_data)
479 if (!Count && !(epd->flags & STM32_USB_EP_ZERO_PACKET))
483 epd->status = BEGIN_SERVICED;
485 if ((epd->flags & STM32_USB_EP_ZERO_PACKET) &&
486 (Count == epd->max_size))
487 epd->flags |= STM32_USB_EP_ZERO_PACKET |
488 STM32_USB_EP_ZERO_POSSIBLE;
490 CountHold = Count = MIN(Count, epd->max_size);
492 epd->flags |= STM32_USB_EP_ZERO_PACKET;
493 Offset = epd->offset;
494 epd->offset += Count;
497 case USB_ENDPOINT_XFER_CONTROL:
498 case USB_ENDPOINT_XFER_INT:
499 pDst = (uint32_t *)USB_MEM_ADDR(EP_DTB_READ(EP >> 1, ADDR_TX_OFFSET));
501 case USB_ENDPOINT_XFER_BULK:
502 pDst = (uint32_t *)USB_MEM_ADDR(EP_DTB_READ(EP >> 1, ADDR_TX_OFFSET));
504 case USB_ENDPOINT_XFER_ISOC:
505 LOG_ERR("%s: isochronous transfer not supported\n",
507 /* Fallback to default */
513 /* Write data to packet memory buffer */
516 Data = *(epd->write_buffer + Offset++);
519 Data |= (uint32_t)(*(epd->write_buffer + Offset++)) << 8;
525 EP_DTB_WRITE(EP >> 1, COUNT_TX_OFFSET, CountHold);
526 ep_ctrl_set_stat_tx(epd->hw, EP_VALID);
528 --ep_cnfg[EP].avail_data;
529 Count = epd->size - epd->offset;
531 if (!Count && !(epd->flags & STM32_USB_EP_ZERO_PACKET))
533 epd->status = COMPLETE;
534 /* call callback function */
542 while (epd->avail_data)
544 /* Get data size and buffer pointer */
547 case USB_ENDPOINT_XFER_CONTROL:
548 case USB_ENDPOINT_XFER_INT:
549 /* Get received bytes number */
550 Count = EP_DTB_READ(EP >> 1, COUNT_RX_OFFSET) & 0x3FF;
551 /* Get address of the USB packet buffer for corresponding EP */
552 pSrc = (uint32_t *)USB_MEM_ADDR(EP_DTB_READ(EP >> 1, ADDR_RX_OFFSET));
554 case USB_ENDPOINT_XFER_BULK:
555 /* Get received bytes number */
556 Count = EP_DTB_READ(EP >> 1, COUNT_RX_OFFSET) & 0x3FF;
557 /* Get address of the USB packet buffer for corresponding EP */
558 pSrc = (uint32_t *)USB_MEM_ADDR(EP_DTB_READ(EP >> 1, ADDR_RX_OFFSET));
560 case USB_ENDPOINT_XFER_ISOC:
561 LOG_ERR("%s: isochronous transfer not supported\n",
563 /* Fallback to default */
569 if (Count > (epd->size - epd->offset))
571 epd->status = BUFFER_OVERRUN;
572 epd->size = ep_cnfg[EP].offset;
575 else if (Count < ep_cnfg[EP].max_size)
577 epd->status = BUFFER_UNDERRUN;
578 epd->size = ep_cnfg[EP].offset + Count;
581 epd->status = BEGIN_SERVICED;
583 Offset = epd->offset;
584 epd->offset += Count;
586 /* Read data from packet memory buffer */
590 *(epd->read_buffer + Offset++) = Data;
594 *(epd->read_buffer + Offset++) = Data;
599 ep_ctrl_set_stat_rx(epd->hw, EP_VALID);
601 --ep_cnfg[EP].avail_data;
603 if (*epd->hw & (1UL << 11))
605 ep_cnfg[EP].status = SETUP_OVERWRITE;
608 if (!(Count = (epd->size - epd->offset)))
610 epd->status = COMPLETE;
614 if (epd->status != BEGIN_SERVICED && epd->status != NO_SERVICED)
616 /* call callback function */
624 * Return the lower value from Host expected size and size and set a flag
625 * STM32_USB_EP_ZERO_POSSIBLE when size is lower that host expected size.
627 static size_t usb_size(size_t size, size_t host_size)
629 if (size < host_size)
631 ep_cnfg[CTRL_ENP_IN].flags |= STM32_USB_EP_ZERO_POSSIBLE;
637 /* Configure an EP descriptor before performing a I/O operation */
638 #define USB_EP_IO(__EP, __op, __buf, __size, __complete) \
641 stm32_UsbIoStatus ret; \
643 /* Fill EP descriptor */ \
644 IRQ_SAVE_DISABLE(flags); \
647 ep_cnfg[__EP].status = NOT_READY; \
648 ep_cnfg[__EP].complete = NULL; \
652 if (ep_cnfg[__EP].status == BEGIN_SERVICED) \
658 * NOTE: the write_buffer and read_buffer are actually the \
659 * same location in memory (it's a union). \
661 * We have to do this trick to silent a build warning by \
662 * casting the I/O buffer to (void *) or (const void *). \
664 ep_cnfg[__EP].__op ## _buffer = __buf; \
665 ep_cnfg[__EP].offset = 0; \
666 ep_cnfg[__EP].size = __size; \
667 ep_cnfg[__EP].complete = __complete; \
669 ep_cnfg[__EP].flags = STM32_USB_EP_ZERO_PACKET; \
671 ep_cnfg[__EP].flags = 0; \
672 ep_cnfg[__EP].status = NO_SERVICED; \
674 /* Perform the I/O operation */ \
677 ret = ep_cnfg[__EP].status; \
679 IRQ_RESTORE(flags); \
683 /* Configure and endponint and perform a read operation */
684 static stm32_UsbIoStatus
685 __usb_ep_read(int ep, void *buffer, ssize_t size, void (*complete)(int))
687 if (UNLIKELY((ep >= ENP_MAX_NUMB) || (ep & 0x01)))
689 LOG_ERR("%s: invalid EP number %d\n", __func__, ep);
693 if (UNLIKELY((size_t)buffer & 0x03))
695 LOG_ERR("%s: unaligned buffer @ %p\n", __func__, buffer);
699 return USB_EP_IO(ep, read, buffer, size, complete);
702 /* Configure and endponint and perform a write operation */
703 static stm32_UsbIoStatus
704 __usb_ep_write(int ep, const void *buffer, ssize_t size, void (*complete)(int))
706 if (UNLIKELY((ep >= ENP_MAX_NUMB) || !(ep & 0x01)))
708 LOG_ERR("%s: invalid EP number %d\n", __func__, ep);
712 if (UNLIKELY((size_t)buffer & 0x03))
714 LOG_ERR("%s: unaligned buffer @ %p\n", __func__, buffer);
718 return USB_EP_IO(ep, write, buffer, size, complete);
721 static void usb_ep_low_level_config(int ep, uint16_t offset, uint16_t size)
723 stm32_UsbEp *epc = &ep_cnfg[ep];
729 ep_ctrl_set_stat_tx(epc->hw, EP_DISABLED);
730 /* Clear Tx toggle */
731 ep_ctrl_set_dtog_tx(epc->hw, 0);
732 /* Clear Correct Transfer for transmission flag */
733 ep_ctrl_clr_ctr_tx(epc->hw);
735 /* Update EP description table */
736 EP_DTB_WRITE(ep >> 1, ADDR_TX_OFFSET, offset);
737 EP_DTB_WRITE(ep >> 1, COUNT_TX_OFFSET, 0);
742 uint16_t rx_count = 0;
745 ep_ctrl_set_stat_rx(epc->hw, EP_DISABLED);
746 /* Clear Rx toggle */
747 ep_ctrl_set_dtog_rx(epc->hw, 0);
748 /* Clear Correct Transfer for reception flag */
749 ep_ctrl_clr_ctr_rx(epc->hw);
750 /* Descriptor block size field */
751 rx_count |= (size > 62) << 15;
752 /* Descriptor number of blocks field */
753 rx_count |= (((size > 62) ? (size >> 5) - 1 : size >> 1) &
755 /* Update EP description table */
756 EP_DTB_WRITE(ep >> 1, ADDR_RX_OFFSET, offset);
757 EP_DTB_WRITE(ep >> 1, COUNT_RX_OFFSET, rx_count);
761 /* Enable/Disable an endpoint */
762 static int usb_ep_configure(const UsbEndpointDesc *epd, bool enable)
770 EP = usb_ep_logical_to_hw(epd->bEndpointAddress);
771 ep_hw = &ep_cnfg[EP];
776 * Allocate packet memory for EP buffer/s calculate actual size
777 * only for the OUT EPs.
779 size = epd->wMaxPacketSize;
780 if (!usb_alloc_buffer(&Offset, &size, EP))
781 return -USB_MEMORY_FULL;
784 ep_hw->status = NOT_READY;
788 /* Set endpoint type */
789 ep_hw->type = usb_endpointType(epd);
790 /* Init EP max packet size */
791 ep_hw->max_size = epd->wMaxPacketSize;
794 ep_hw->avail_data = 1;
796 ep_hw->avail_data = 0;
797 hw = (reg32_t *)&usb->EP0R;
801 ep_ctrl_set_ea(hw, EP >> 1);
803 LOG_INFO("%s: EP%d-%s configured\n",
804 __func__, EP >> 1, EP & 1 ? "IN" : "OUT");
806 /* Low-level endpoint configuration */
807 usb_ep_low_level_config(EP, Offset, size);
809 /* Set EP Kind & enable */
812 case USB_ENDPOINT_XFER_CONTROL:
813 LOG_INFO("EP%d: CONTROL IN\n", EP >> 1);
814 ep_ctrl_set_ep_type(hw, EP_CTRL);
815 ep_ctrl_set_ep_kind(hw, 0);
817 case USB_ENDPOINT_XFER_INT:
818 LOG_INFO("EP%d: INTERRUPT IN\n", EP >> 1);
819 ep_ctrl_set_ep_type(hw, EP_INTERRUPT);
820 ep_ctrl_set_ep_kind(hw, 0);
822 case USB_ENDPOINT_XFER_BULK:
823 LOG_INFO("EP%d: BULK IN\n", EP >> 1);
824 ep_ctrl_set_ep_type(hw, EP_BULK);
825 ep_ctrl_set_ep_kind(hw, 0);
827 case USB_ENDPOINT_XFER_ISOC:
828 LOG_ERR("EP%d: ISOCHRONOUS IN: not supported\n", EP >> 1);
829 /* Fallback to default */
832 return -USB_NODEV_ERROR;
837 ep_ctrl_set_stat_tx(hw, EP_NAK);
838 /* Clear Correct Transfer for transmission flag */
839 ep_ctrl_clr_ctr_tx(hw);
844 ep_ctrl_set_stat_rx(hw, EP_VALID);
847 else if (ep_cnfg[EP].hw)
849 hw = (reg32_t *)&usb->EP0R;
856 ep_ctrl_set_stat_tx(hw, EP_DISABLED);
857 /* Clear Correct Transfer for reception flag */
858 ep_ctrl_clr_ctr_tx(hw);
864 ep_ctrl_set_stat_rx(hw, EP_DISABLED);
865 /* Clear Correct Transfer for reception flag */
866 ep_ctrl_clr_ctr_rx(hw);
870 ep_cnfg[EP].hw = NULL;
875 /* Get EP stall/unstall */
876 static int usb_ep_get_stall(int EP, bool *pStall)
878 if (ep_cnfg[EP].hw == NULL)
879 return -USB_NODEV_ERROR;
881 *pStall = (EP & 0x01) ?
882 (ep_ctrl_get_stat_tx(ep_cnfg[EP].hw) == EP_STALL): /* IN EP */
883 (ep_ctrl_get_stat_rx(ep_cnfg[EP].hw) == EP_STALL); /* OUT EP */
888 /* Set EP stall/unstall */
889 static int usb_ep_set_stall(int EP, bool Stall)
891 if (ep_cnfg[EP].hw == NULL)
892 return -USB_NODEV_ERROR;
896 ep_cnfg[EP].status = STALLED;
900 ep_ctrl_set_stat_tx(ep_cnfg[EP].hw, EP_STALL);
901 ep_cnfg[EP].avail_data = 1;
906 ep_ctrl_set_stat_rx(ep_cnfg[EP].hw, EP_STALL);
907 ep_cnfg[EP].avail_data = 0;
912 ep_cnfg[EP].status = NOT_READY;
916 ep_cnfg[EP].avail_data = 1;
917 /* reset Data Toggle bit */
918 ep_ctrl_set_dtog_tx(ep_cnfg[EP].hw, 0);
919 ep_ctrl_set_stat_tx(ep_cnfg[EP].hw, EP_NAK);
924 ep_cnfg[EP].avail_data = 0;
925 /* reset Data Toggle bit */
926 ep_ctrl_set_dtog_rx(ep_cnfg[EP].hw, 0);
927 ep_ctrl_set_stat_rx(ep_cnfg[EP].hw, EP_VALID);
933 /* Stall both directions of the control EP */
934 static void usb_ep_set_stall_ctrl(void)
936 ep_cnfg[CTRL_ENP_IN].avail_data = 1;
937 ep_cnfg[CTRL_ENP_IN].status = STALLED;
938 ep_cnfg[CTRL_ENP_OUT].avail_data = 0;
939 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
941 usb_ep_set_stall(CTRL_ENP_IN, true);
942 usb_ep_set_stall(CTRL_ENP_OUT, true);
946 * Find the position of an interface descriptor inside the configuration
949 static int usb_find_interface(uint32_t num, uint32_t alt)
951 const UsbInterfaceDesc *id;
956 /* TODO: support more than one configuration per device */
957 id = (const UsbInterfaceDesc *)usb_dev->config[i];
960 if (id->bDescriptorType != USB_DT_INTERFACE)
962 if ((id->bInterfaceNumber == num) &&
963 (id->bAlternateSetting == alt))
966 return -USB_NODEV_ERROR;
970 * Configure/deconfigure EPs of a certain interface.
973 usb_configure_ep_interface(unsigned int num, unsigned int alt, bool enable)
975 const UsbEndpointDesc *epd;
979 * Find the position of the interface descriptor (inside the
980 * configuration descriptor).
982 start = usb_find_interface(num, alt);
985 LOG_ERR("%s: interface (%u,%u) not found\n",
990 * Cycle over endpoint descriptors.
992 * NOTE: the first endpoint descriptor is placed next to the interface
993 * descriptor, so we need to add +1 to the position of the interface
994 * descriptor to find it.
996 for (i = start + 1; ; i++)
998 epd = (const UsbEndpointDesc *)usb_dev->config[i];
999 if ((epd == NULL) || (epd->bDescriptorType == USB_DT_INTERFACE))
1001 if (epd->bDescriptorType != USB_DT_ENDPOINT)
1003 if (UNLIKELY(usb_ep_configure(epd, enable) < 0))
1005 LOG_ERR("%s: out of memory, can't initialize EP\n",
1012 /* Set device state */
1013 static void usb_set_device_state(int state)
1017 LOG_INFO("%s: new state %d\n", __func__, state);
1019 if (udc.state == USB_STATE_CONFIGURED)
1021 /* Deconfigure device */
1022 for (i = 0; i < udc.interfaces; ++i)
1023 usb_configure_ep_interface(i,
1028 case USB_STATE_ATTACHED:
1029 case USB_STATE_POWERED:
1030 case USB_STATE_DEFAULT:
1032 usb_dev->configured = false;
1033 udc.address = udc.cfg_id = 0;
1035 case USB_STATE_ADDRESS:
1038 case USB_STATE_CONFIGURED:
1039 /* Configure device */
1040 for (i = 0; i < udc.interfaces; ++i)
1041 usb_configure_ep_interface(i,
1045 /* Unknown state: disconnected or connection in progress */
1046 usb_dev->configured = false;
1054 /* Setup packet: set address status phase end handler */
1055 static void usb_add_status_handler_end(UNUSED_ARG(int, EP))
1059 w_value = usb_le16_to_cpu(setup_packet.wValue);
1060 udc.address = w_value & 0xff;
1061 usb_set_address(udc.address);
1064 usb_set_device_state(USB_STATE_ADDRESS);
1066 usb_set_device_state(USB_STATE_DEFAULT);
1068 __usb_ep_write(CTRL_ENP_IN, NULL, -1, NULL);
1069 __usb_ep_read(CTRL_ENP_OUT, NULL, -1, NULL);
1072 /* Prepare status phase */
1073 static void usb_status_phase(bool in)
1076 __usb_ep_write(CTRL_ENP_IN, NULL, 0, NULL);
1079 /* Setup packet: status phase end handler */
1080 static void usb_status_handler_end(UNUSED_ARG(int, EP))
1082 __usb_ep_write(CTRL_ENP_IN, NULL, -1, NULL);
1083 __usb_ep_read(CTRL_ENP_OUT, NULL, -1, NULL);
1086 /* Address status handler */
1087 static void usb_status_handler(UNUSED_ARG(int, EP))
1089 if (setup_packet.mRequestType & USB_DIR_IN)
1091 usb_status_phase(false);
1092 ep_cnfg[CTRL_ENP_OUT].complete = usb_status_handler_end;
1096 usb_status_phase(true);
1097 ep_cnfg[CTRL_ENP_IN].complete =
1098 (setup_packet.bRequest == USB_REQ_SET_ADDRESS) ?
1099 usb_add_status_handler_end :
1100 usb_status_handler_end;
1104 static void usb_endpointRead_complete(int ep)
1106 if (UNLIKELY(ep >= ENP_MAX_NUMB))
1111 ASSERT(!(ep & 0x01));
1114 rx_size = ep_cnfg[ep].size;
1117 ssize_t usb_endpointRead(int ep, void *buffer, ssize_t size)
1119 int ep_num = usb_ep_logical_to_hw(ep);
1120 ssize_t max_size = sizeof(ep_buffer);
1122 /* Non-blocking read for EP0 */
1123 if (ep_num == CTRL_ENP_OUT)
1125 size = usb_size(size, usb_le16_to_cpu(setup_packet.wLength));
1126 if (UNLIKELY(size > max_size))
1128 LOG_ERR("%s: ep_buffer exceeded, try to enlarge CONFIG_USB_BUFSIZE\n",
1131 return -USB_BUF_OVERFLOW;
1134 usb_status_handler(ep_num);
1137 __usb_ep_read(ep_num, ep_buffer, size,
1138 usb_status_handler);
1139 memcpy(buffer, ep_buffer, size);
1143 if (UNLIKELY(!size))
1145 size = MIN(size, max_size);
1150 __usb_ep_read(ep_num, ep_buffer, size, usb_endpointRead_complete);
1153 memcpy(buffer, ep_buffer, rx_size);
1158 static void usb_endpointWrite_complete(int ep)
1160 if (UNLIKELY(ep >= ENP_MAX_NUMB))
1168 tx_size = ep_cnfg[ep].size;
1171 ssize_t usb_endpointWrite(int ep, const void *buffer, ssize_t size)
1173 int ep_num = usb_ep_logical_to_hw(ep);
1174 ssize_t max_size = sizeof(ep_buffer);
1176 /* Non-blocking write for EP0 */
1177 if (ep_num == CTRL_ENP_IN)
1179 size = usb_size(size, usb_le16_to_cpu(setup_packet.wLength));
1180 if (UNLIKELY(size > max_size))
1182 LOG_ERR("%s: ep_buffer exceeded, try to enlarge CONFIG_USB_BUFSIZE\n",
1185 return -USB_BUF_OVERFLOW;
1188 usb_status_handler(ep_num);
1191 memcpy(ep_buffer, buffer, size);
1192 __usb_ep_write(ep_num, ep_buffer, size,
1193 usb_status_handler);
1197 if (UNLIKELY(!size))
1199 size = MIN(size, max_size);
1203 /* Blocking write */
1204 memcpy(ep_buffer, buffer, size);
1205 __usb_ep_write(ep_num, ep_buffer, size, usb_endpointWrite_complete);
1212 /* Global variable to handle the following non-blocking I/O operations */
1213 static uint32_t InData;
1215 /* Get device status */
1216 static int usb_send_device_status(uint16_t index)
1219 return -USB_NODEV_ERROR;
1221 InData = ((uint32_t)udc.feature) & 0xff;
1222 __usb_ep_write(CTRL_ENP_IN,
1223 (uint8_t *)&InData, sizeof(uint16_t),
1224 usb_status_handler);
1228 /* Get interface status */
1229 static int usb_send_interface_status(UNUSED_ARG(uint16_t, index))
1232 __usb_ep_write(CTRL_ENP_IN,
1233 (uint8_t *)&InData, sizeof(uint16_t),
1234 usb_status_handler);
1238 /* Get endpoint status */
1239 static int usb_send_ep_status(uint16_t index)
1241 if ((index & 0x7F) > 16)
1242 return -USB_NODEV_ERROR;
1245 usb_ep_get_stall(usb_ep_logical_to_hw(index), (bool *)&InData);
1246 __usb_ep_write(CTRL_ENP_IN,
1247 (uint8_t *)&InData, sizeof(uint16_t),
1248 usb_status_handler);
1252 /* USB setup packet: GET_STATUS request handler */
1253 static void usb_get_status_handler(void)
1255 uint16_t w_value = usb_le16_to_cpu(setup_packet.wValue);
1256 uint16_t w_index = usb_le16_to_cpu(setup_packet.wIndex);
1257 uint16_t w_length = usb_le16_to_cpu(setup_packet.wLength);
1259 /* GET_STATUS sanity checks */
1260 if (udc.state < USB_STATE_ADDRESS)
1262 LOG_WARN("%s: bad GET_STATUS request (State=%02x)\n",
1263 __func__, udc.state);
1264 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1269 LOG_WARN("%s: bad GET_STATUS request (wLength.Word=%02x)\n",
1270 __func__, w_length);
1271 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1274 if (!(setup_packet.mRequestType & USB_DIR_IN))
1276 LOG_WARN("%s: bad GET_STATUS request (mRequestType=%02x)\n",
1277 __func__, setup_packet.mRequestType);
1278 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1283 LOG_WARN("%s: bad GET_STATUS request (wValue=%02x)\n",
1285 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1289 /* Process GET_STATUS request */
1290 switch (setup_packet.mRequestType & USB_RECIP_MASK)
1292 case USB_RECIP_DEVICE:
1293 if (usb_send_device_status(w_index) < 0)
1295 LOG_WARN("%s: GET_STATUS: invalid UsbRecipientDevice\n",
1297 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1300 LOG_INFO("%s: GET_STATUS: mRequestType=%02x (UsbRecipientDevice)\n",
1301 __func__, setup_packet.mRequestType);
1303 case USB_RECIP_INTERFACE:
1304 if (usb_send_interface_status(w_index) < 0)
1306 LOG_WARN("%s: GET_STATUS: invalid UsbRecipientInterface\n",
1308 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1311 LOG_INFO("%s: GET_STATUS: mRequestType=%02x (UsbRecipientInterface)\n",
1312 __func__, setup_packet.mRequestType);
1314 case USB_RECIP_ENDPOINT:
1315 if (usb_send_ep_status(w_index) < 0)
1317 LOG_WARN("%s: GET_STATUS: invalid UsbRecipientEndpoint\n",
1319 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1322 LOG_INFO("%s: GET_STATUS: mRequestType=%02x (UsbRecipientEndpoint)\n",
1323 __func__, setup_packet.mRequestType);
1326 LOG_WARN("%s: GET_STATUS: invalid UsbRecipientEndpoint\n",
1328 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1333 static int usb_get_device_descriptor(int id)
1336 return -USB_NODEV_ERROR;
1338 usb_dev->device->bMaxPacketSize0 = USB_EP0_MAX_SIZE;
1339 __usb_ep_write(CTRL_ENP_IN, (const uint8_t *)usb_dev->device,
1340 usb_size(usb_dev->device->bLength,
1341 usb_le16_to_cpu(setup_packet.wLength)),
1342 usb_status_handler);
1347 * TODO: refactor this part to remove this temporary buffer.
1349 * It would be better to define all the USB descriptors in the right order and
1350 * send them as a contiguous buffer directly from the flash / rodata memory.
1352 #define USB_BUFSIZE (128)
1353 static uint8_t usb_cfg_buffer[USB_BUFSIZE];
1354 STATIC_ASSERT(USB_BUFSIZE < (1 << (sizeof(uint16_t) * 8)));
1356 static int usb_get_configuration_descriptor(int id)
1358 const UsbConfigDesc **config =
1359 (const UsbConfigDesc **)usb_dev->config;
1360 uint8_t *p = usb_cfg_buffer;
1363 /* TODO: support more than one configuration per device */
1364 if (UNLIKELY(id > 0))
1365 return -USB_NODEV_ERROR;
1367 for (i = 0; config[i]; i++)
1369 memcpy(p, config[i], config[i]->bLength);
1370 p += config[i]->bLength;
1372 if (UNLIKELY((p - usb_cfg_buffer) > USB_BUFSIZE))
1375 return -USB_BUF_OVERFLOW;
1378 ((UsbConfigDesc *)usb_cfg_buffer)->wTotalLength =
1379 usb_cpu_to_le16((uint16_t)(p - usb_cfg_buffer));
1380 __usb_ep_write(CTRL_ENP_IN,
1382 usb_size(p - usb_cfg_buffer,
1383 usb_le16_to_cpu(setup_packet.wLength)),
1384 usb_status_handler);
1388 static int usb_get_string_descriptor(unsigned int id)
1390 const UsbStringDesc *lang_str;
1391 unsigned int lang_id, str_id;
1392 uint16_t w_index_lo = usb_le16_to_cpu(setup_packet.wIndex) & 0x00ff;
1393 uint16_t w_index_hi = (usb_le16_to_cpu(setup_packet.wIndex) &
1396 ASSERT(usb_dev->strings != NULL);
1397 ASSERT(usb_dev->strings[0] != NULL);
1399 lang_str = usb_dev->strings[0];
1402 /* Find Language index */
1403 for (lang_id = 0; ; lang_id++)
1405 const UsbStringDesc *str =
1406 usb_dev->strings[lang_id];
1407 if (UNLIKELY(str == NULL))
1408 return -USB_NODEV_ERROR;
1409 if ((str->data[0] == w_index_lo) &&
1410 (str->data[1] == w_index_hi))
1413 /* Check buffer overflow to find string index */
1414 for (str_id = 0; str_id < id; str_id++)
1416 lang_str = usb_dev->strings[lang_id + 1 + str_id];
1417 if (lang_str == NULL)
1418 return -USB_NODEV_ERROR;
1421 __usb_ep_write(CTRL_ENP_IN,
1423 usb_size(lang_str->bLength,
1424 usb_le16_to_cpu(setup_packet.wLength)),
1425 usb_status_handler);
1429 static void usb_get_descriptor(void)
1431 uint16_t w_value_lo = usb_le16_to_cpu(setup_packet.wValue) & 0x00ff;
1432 uint16_t w_value_hi = (usb_le16_to_cpu(setup_packet.wValue) & 0xff00) >> 8;
1434 if (udc.state < USB_STATE_DEFAULT)
1436 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1442 LOG_INFO("%s: GET_DEVICE_DESCRIPTOR: id=%d, state=%d\n",
1446 if (usb_get_device_descriptor(w_value_lo) < 0)
1447 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1450 LOG_INFO("%s: GET_CONFIG_DESCRIPTOR: id=%d, state=%d\n",
1451 __func__, w_value_lo, udc.state);
1452 if (usb_get_configuration_descriptor(w_value_lo) < 0)
1453 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1456 LOG_INFO("%s: GET_STRING_DESCRIPTOR: id=%d, state=%d\n",
1457 __func__, w_value_lo, udc.state);
1458 if (usb_get_string_descriptor(w_value_lo) < 0)
1459 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1462 LOG_WARN("%s: GET_UNKNOWN_DESCRIPTOR: id=%d, state=%d\n",
1463 __func__, w_value_lo, udc.state);
1464 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1469 /* USB setup packet: class/vendor request handler */
1470 static void usb_event_handler(UsbDevice *dev)
1473 * TODO: get the appropriate usb_dev in function of the endpoint
1477 dev->event_cb(&setup_packet);
1480 /* USB setup packet: GET_DESCRIPTOR handler */
1481 static void usb_get_descriptor_handler(void)
1483 LOG_INFO("%s: GET_DESCRIPTOR: RECIP = %d\n",
1485 setup_packet.mRequestType & USB_RECIP_MASK);
1486 if ((setup_packet.mRequestType & USB_RECIP_MASK) ==
1488 usb_get_descriptor();
1489 /* Getting descriptor for a device is a standard request */
1490 else if ((setup_packet.mRequestType & USB_DIR_MASK) == USB_DIR_IN)
1491 usb_event_handler(usb_dev);
1493 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1496 /* USB setup packet: SET_ADDRESS handler */
1497 static void usb_set_address_handler(void)
1499 uint16_t w_value = usb_le16_to_cpu(setup_packet.wValue);
1500 uint16_t w_index = usb_le16_to_cpu(setup_packet.wIndex);
1501 uint16_t w_length = usb_le16_to_cpu(setup_packet.wLength);
1503 LOG_INFO("%s: SET_ADDRESS: %d\n",
1504 __func__, usb_le16_to_cpu(setup_packet.wValue));
1505 if ((udc.state >= USB_STATE_DEFAULT) &&
1506 ((setup_packet.mRequestType & USB_RECIP_MASK) ==
1507 USB_RECIP_DEVICE) &&
1508 (w_index == 0) && (w_length == 0) && (w_value < 128))
1509 usb_status_handler(CTRL_ENP_IN);
1511 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1514 /* USB setup packet: GET_CONFIGURATION handler */
1515 static void usb_get_config_handler(void)
1517 uint16_t w_value = usb_le16_to_cpu(setup_packet.wValue);
1518 uint16_t w_index = usb_le16_to_cpu(setup_packet.wIndex);
1520 LOG_INFO("%s: GET_CONFIGURATION\n", __func__);
1521 if ((udc.state >= USB_STATE_ADDRESS) &&
1522 (w_value == 0) && (w_index == 0) && (w_value == 1))
1524 InData = udc.cfg_id;
1525 __usb_ep_write(CTRL_ENP_IN, (uint8_t *)&InData, 1, usb_status_handler);
1528 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1531 static const UsbConfigDesc *usb_find_configuration(int num)
1533 const UsbConfigDesc *cfg;
1538 cfg = (const UsbConfigDesc *)usb_dev->config[i];
1541 if (cfg->bDescriptorType != USB_DT_CONFIG)
1543 if (cfg->bConfigurationValue == num)
1549 static int usb_set_config_state(uint32_t conf)
1551 const UsbConfigDesc *pCnfg;
1556 /* Find configuration descriptor */
1557 pCnfg = usb_find_configuration(conf);
1559 return -USB_NODEV_ERROR;
1561 /* Reset current configuration */
1562 usb_set_device_state(USB_STATE_ADDRESS);
1563 usb_dev->configured = false;
1566 /* Set Interface and Alternative Setting */
1568 /* Set self-powered state */
1569 if (pCnfg->bmAttributes & USB_CONFIG_ATT_SELFPOWER)
1570 udc.feature |= STM32_UDC_FEATURE_SELFPOWERED;
1572 /* Configure all existing interfaces to alternative setting 0 */
1573 ASSERT(pCnfg->bNumInterfaces <= USB_MAX_INTERFACE);
1574 udc.interfaces = pCnfg->bNumInterfaces;
1575 for (i = 0; i < udc.interfaces; i++)
1577 usb_set_device_state(USB_STATE_CONFIGURED);
1578 usb_dev->configured = true;
1579 LOG_INFO("%s: device configured\n", __func__);
1583 usb_dev->configured = false;
1584 usb_set_device_state(USB_STATE_ADDRESS);
1589 /* USB setup packet: SET_CONFIGURATION handler */
1590 static void usb_set_config_handler(void)
1592 uint16_t w_value = usb_le16_to_cpu(setup_packet.wValue);
1593 uint16_t w_index = usb_le16_to_cpu(setup_packet.wIndex);
1594 uint16_t w_length = usb_le16_to_cpu(setup_packet.wLength);
1596 LOG_INFO("%s: SET_CONFIGURATION: %d\n",
1598 if ((udc.state >= USB_STATE_ADDRESS) &&
1599 (w_index == 0) && (w_length == 0) &&
1600 (usb_set_config_state(w_value & 0xff) == 0))
1601 usb_status_handler(CTRL_ENP_OUT);
1603 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1606 /* USB setup packet: standard request handler */
1607 static void usb_standard_request_handler(void)
1609 switch (setup_packet.bRequest)
1611 case USB_REQ_GET_STATUS:
1612 usb_get_status_handler();
1614 case USB_REQ_CLEAR_FEATURE:
1615 LOG_INFO("%s: bRequest=%d (CLEAR_FEATURE)\n",
1616 __func__, setup_packet.bRequest);
1618 case USB_REQ_SET_FEATURE:
1619 LOG_INFO("%s: bRequest=%d (SET_FEATURE)\n",
1620 __func__, setup_packet.bRequest);
1622 case USB_REQ_SET_ADDRESS:
1623 usb_set_address_handler();
1625 case USB_REQ_GET_DESCRIPTOR:
1626 usb_get_descriptor_handler();
1628 case USB_REQ_SET_DESCRIPTOR:
1629 LOG_INFO("%s: bRequest=%d (SET_DESCRIPTOR)\n",
1630 __func__, setup_packet.bRequest);
1632 case USB_REQ_GET_CONFIGURATION:
1633 usb_get_config_handler();
1635 case USB_REQ_SET_CONFIGURATION:
1636 usb_set_config_handler();
1638 case USB_REQ_GET_INTERFACE:
1639 LOG_INFO("%s: bRequest=%d (GET_INTERFACE)\n",
1640 __func__, setup_packet.bRequest);
1642 case USB_REQ_SET_INTERFACE:
1643 LOG_INFO("%s: bRequest=%d (SET_INTERFACE)\n",
1644 __func__, setup_packet.bRequest);
1646 case USB_REQ_SYNCH_FRAME:
1647 LOG_INFO("%s: bRequest=%d (SYNCH_FRAME)\n",
1648 __func__, setup_packet.bRequest);
1651 LOG_WARN("%s: bRequest=%d (Unknown)\n",
1652 __func__, setup_packet.bRequest);
1653 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1658 /* USB setup packet handler */
1659 static void usb_setup_handler(void)
1661 switch (setup_packet.mRequestType & USB_TYPE_MASK)
1664 case USB_TYPE_STANDARD:
1665 LOG_INFO("%s: bmRequestType=%02x (Standard)\n",
1666 __func__, setup_packet.mRequestType);
1667 usb_standard_request_handler();
1670 case USB_TYPE_CLASS:
1671 LOG_INFO("%s: bmRequestType=%02x (Class)\n",
1672 __func__, setup_packet.mRequestType);
1673 usb_event_handler(usb_dev);
1676 case USB_TYPE_VENDOR:
1677 LOG_INFO("%s: bmRequestType=%02x (Vendor)\n",
1678 __func__, setup_packet.mRequestType);
1679 usb_event_handler(usb_dev);
1681 case USB_TYPE_RESERVED:
1682 LOG_INFO("%s: bmRequestType=%02x (Reserved)\n",
1683 __func__, setup_packet.mRequestType);
1687 LOG_WARN("%s: bmRequestType=%02x (Unknown)\n",
1688 __func__, setup_packet.mRequestType);
1689 ep_cnfg[CTRL_ENP_OUT].status = STALLED;
1694 /* USB: low-level hardware initialization */
1695 static void usb_hw_reset(void)
1700 /* Initialize endpoint descriptors */
1701 for (i = 0; i < countof(ep_cnfg); i++)
1702 ep_cnfg[i].hw = NULL;
1704 /* Initialize USB memory */
1705 for (i = 0; i < countof(memory_buffer); i++)
1706 memory_buffer[i].Size = 0;
1707 usb->BTABLE = USB_BDT_OFFSET;
1710 /* Endpoint initialization */
1711 ret = usb_ep_configure(&USB_CtrlEpDescr0, true);
1712 if (UNLIKELY(ret < 0))
1714 LOG_WARN("%s: out of memory, cannot initialize EP0\n",
1718 ret = usb_ep_configure(&USB_CtrlEpDescr1, true);
1719 if (UNLIKELY(ret < 0))
1721 LOG_WARN("%s: out of memory, cannot initialize EP1\n",
1726 /* Set default address */
1729 /* Enable all the device interrupts */
1730 usb->CNTR = bmCTRM | bmRESETM | bmSOFM | bmERRM | bmPMAOVRM |
1734 /* Handle a correct transfer under ISR */
1735 static void usb_isr_correct_transfer(stm32_usb_irq_status_t interrupt)
1738 reg32_t *pReg = (reg32_t *)&usb->EP0R;
1740 /* Find corresponding EP */
1741 pReg += interrupt.EP_ID;
1742 EP = (int)(((*pReg & 0x0f) << 1) + (interrupt.DIR ? 0 : 1));
1743 ep_cnfg[EP].avail_data = 1;
1745 ASSERT(ep_cnfg[EP].hw);
1748 ep_ctrl_clr_ctr_tx(ep_cnfg[EP].hw);
1750 ep_ctrl_clr_ctr_rx(ep_cnfg[EP].hw);
1751 if (EP == CTRL_ENP_OUT)
1753 /* Determinate type of packet (only for control EP) */
1754 bool SetupPacket = ep_ctrl_get_setup(ep_cnfg[CTRL_ENP_OUT].hw);
1758 ep_cnfg[CTRL_ENP_IN].avail_data = 1;
1759 /* init IO to receive Setup packet */
1760 __usb_ep_write(CTRL_ENP_IN, NULL, -1, NULL);
1761 __usb_ep_read(CTRL_ENP_OUT, &setup_packet,
1762 sizeof(setup_packet), NULL);
1764 /* reset EP IO ctrl */
1765 if (setup_packet.mRequestType & USB_DIR_IN)
1766 usb_status_handler(CTRL_ENP_OUT);
1767 usb_setup_handler();
1768 if (ep_cnfg[CTRL_ENP_OUT].status == STALLED)
1769 usb_ep_set_stall_ctrl();
1773 if (ep_cnfg[CTRL_ENP_OUT].complete &&
1774 setup_packet.mRequestType & USB_DIR_IN)
1775 ep_cnfg[CTRL_ENP_OUT].complete(CTRL_ENP_OUT);
1780 else if (EP == CTRL_ENP_IN)
1782 if (ep_cnfg[CTRL_ENP_IN].complete &&
1783 !(setup_packet.mRequestType & USB_DIR_IN))
1784 ep_cnfg[CTRL_ENP_IN].complete(CTRL_ENP_IN);
1793 /* USB: interrupt service routine */
1794 static void usb_isr(void)
1796 stm32_usb_irq_status_t interrupt;
1798 /* Get masked interrupt flags */
1799 interrupt.status = usb->ISTR;
1800 interrupt.status &= usb->CNTR | 0x1f;
1802 if (interrupt.PMAOVR)
1804 LOG_WARN("%s: DMA overrun / underrun\n", __func__);
1805 usb->ISTR = ~bmPMAOVRM;
1809 LOG_WARN("%s: engine error\n", __func__);
1810 usb->ISTR = ~bmERRM;
1812 if (interrupt.RESET)
1814 LOG_INFO("%s: device reset\n", __func__);
1815 usb->ISTR = ~bmRESETM;
1817 usb_set_device_state(USB_STATE_DEFAULT);
1823 * XXX: disable logging of frame interrupts (too much noise!)
1825 uint16_t frame_nr = usb->FNR & 0x0fff;
1826 LOG_INFO("%s: frame %#x\n", __func__, frame_nr);
1828 usb->ISTR = ~bmSOFM;
1832 LOG_INFO("%s: wake-up\n", __func__);
1833 usb->ISTR = ~(bmSUSPM | bmWKUPM);
1838 LOG_INFO("%s: suspend\n", __func__);
1840 usb->ISTR = ~(bmSUSPM | bmWKUPM);
1844 LOG_INFO("%s: expected frame\n", __func__);
1845 usb->ISTR = ~bmESOFM;
1849 usb_isr_correct_transfer(interrupt);
1853 /* USB: hardware initialization */
1854 static void usb_hw_init(void)
1856 /* Enable clocking on the required GPIO pins */
1857 RCC->APB2ENR |= RCC_APB2_GPIOA | RCC_APB2_GPIOC;
1859 /* Make sure that the CAN controller is disabled and held in reset */
1860 RCC->APB1ENR &= ~RCC_APB1_CAN;
1862 /* Configure USB_DM and USB_DP to work as USB lines */
1863 stm32_gpioPinConfig((struct stm32_gpio *)GPIOA_BASE,
1864 USB_DM_PIN | USB_DP_PIN,
1865 GPIO_MODE_AF_PP, GPIO_SPEED_50MHZ);
1866 /* Configure USB_DISC to work as USB disconnect */
1867 stm32_gpioPinConfig((struct stm32_gpio *)GPIOC_BASE,
1869 GPIO_MODE_OUT_PP, GPIO_SPEED_50MHZ);
1870 stm32_gpioPinWrite((struct stm32_gpio *)GPIOC_BASE,
1873 /* Ensure the USB clock is disabled before setting the prescaler */
1874 RCC->APB1ENR &= ~RCC_APB1_USB;
1876 /* Configure USB clock (48MHz) */
1877 *CFGR_USBPRE_BB &= ~RCC_USBCLK_PLLCLK_1DIV5;
1879 /* Activate USB clock */
1880 RCC->APB1ENR |= RCC_APB1_USB;
1882 /* Force USB reset and disable USB interrupts */
1886 /* Issue a USB reset */
1889 /* Clear spurious pending interrupt */
1892 /* Register interrupt handler */
1893 sysirq_setHandler(USB_LP_CAN_RX0_IRQHANDLER, usb_isr);
1895 /* Software connection enable */
1899 /* Initialize the USB controller */
1900 static void usb_init(void)
1902 udc.state = USB_STATE_NOTATTACHED;
1908 /* Register an upper layer USB device into the driver */
1909 int usb_deviceRegister(UsbDevice *dev)
1916 while (!usb_dev->configured)