diff options
Diffstat (limited to 'tinyusb/src/portable/st/synopsys/dcd_synopsys.c')
| -rwxr-xr-x | tinyusb/src/portable/st/synopsys/dcd_synopsys.c | 1186 |
1 files changed, 1186 insertions, 0 deletions
diff --git a/tinyusb/src/portable/st/synopsys/dcd_synopsys.c b/tinyusb/src/portable/st/synopsys/dcd_synopsys.c new file mode 100755 index 00000000..8a998aa3 --- /dev/null +++ b/tinyusb/src/portable/st/synopsys/dcd_synopsys.c @@ -0,0 +1,1186 @@ +/* + * The MIT License (MIT) + * + * Copyright (c) 2018 Scott Shawcroft, 2019 William D. Jones for Adafruit Industries + * Copyright (c) 2019 Ha Thach (tinyusb.org) + * Copyright (c) 2020 Jan Duempelmann + * Copyright (c) 2020 Reinhard Panhuber + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + * + * This file is part of the TinyUSB stack. + */ + +#include "tusb_option.h" + +// Since TinyUSB doesn't use SOF for now, and this interrupt too often (1ms interval) +// We disable SOF for now until needed later on +#define USE_SOF 0 + +#if defined (STM32F105x8) || defined (STM32F105xB) || defined (STM32F105xC) || \ + defined (STM32F107xB) || defined (STM32F107xC) +#define STM32F1_SYNOPSYS +#endif + +#if defined (STM32L475xx) || defined (STM32L476xx) || \ + defined (STM32L485xx) || defined (STM32L486xx) || defined (STM32L496xx) || \ + defined (STM32L4R5xx) || defined (STM32L4R7xx) || defined (STM32L4R9xx) || \ + defined (STM32L4S5xx) || defined (STM32L4S7xx) || defined (STM32L4S9xx) +#define STM32L4_SYNOPSYS +#endif + +#if TUSB_OPT_DEVICE_ENABLED && \ + ( (CFG_TUSB_MCU == OPT_MCU_STM32F1 && defined(STM32F1_SYNOPSYS)) || \ + CFG_TUSB_MCU == OPT_MCU_STM32F2 || \ + CFG_TUSB_MCU == OPT_MCU_STM32F4 || \ + CFG_TUSB_MCU == OPT_MCU_STM32F7 || \ + CFG_TUSB_MCU == OPT_MCU_STM32H7 || \ + (CFG_TUSB_MCU == OPT_MCU_STM32L4 && defined(STM32L4_SYNOPSYS) || \ + CFG_TUSB_MCU == OPT_MCU_GD32VF103 ) \ + ) + +// EP_MAX : Max number of bi-directional endpoints including EP0 +// EP_FIFO_SIZE : Size of dedicated USB SRAM +#if CFG_TUSB_MCU == OPT_MCU_STM32F1 +#include "stm32f1xx.h" +#define EP_MAX_FS 4 +#define EP_FIFO_SIZE_FS 1280 + +#elif CFG_TUSB_MCU == OPT_MCU_STM32F2 +#include "stm32f2xx.h" +#define EP_MAX_FS USB_OTG_FS_MAX_IN_ENDPOINTS +#define EP_FIFO_SIZE_FS USB_OTG_FS_TOTAL_FIFO_SIZE + +#elif CFG_TUSB_MCU == OPT_MCU_STM32F4 +#include "stm32f4xx.h" +#define EP_MAX_FS USB_OTG_FS_MAX_IN_ENDPOINTS +#define EP_FIFO_SIZE_FS USB_OTG_FS_TOTAL_FIFO_SIZE +#define EP_MAX_HS USB_OTG_HS_MAX_IN_ENDPOINTS +#define EP_FIFO_SIZE_HS USB_OTG_HS_TOTAL_FIFO_SIZE + +#elif CFG_TUSB_MCU == OPT_MCU_STM32H7 +#include "stm32h7xx.h" +#define EP_MAX_FS 9 +#define EP_FIFO_SIZE_FS 4096 +#define EP_MAX_HS 9 +#define EP_FIFO_SIZE_HS 4096 + +#elif CFG_TUSB_MCU == OPT_MCU_STM32F7 +#include "stm32f7xx.h" +#define EP_MAX_FS 6 +#define EP_FIFO_SIZE_FS 1280 +#define EP_MAX_HS 9 +#define EP_FIFO_SIZE_HS 4096 + +#elif CFG_TUSB_MCU == OPT_MCU_STM32L4 +#include "stm32l4xx.h" +#define EP_MAX_FS 6 +#define EP_FIFO_SIZE_FS 1280 + +#elif CFG_TUSB_MCU == OPT_MCU_GD32VF103 +#include "synopsys_common.h" + +// These numbers are the same for the whole GD32VF103 family. +#define OTG_FS_IRQn 86 +#define EP_MAX_FS 4 +#define EP_FIFO_SIZE_FS 1280 + +// The GD32VF103 is a RISC-V MCU, which implements the ECLIC Core-Local +// Interrupt Controller by Nuclei. It is nearly API compatible to the +// NVIC used by ARM MCUs. +#define ECLIC_INTERRUPT_ENABLE_BASE 0xD2001001UL + +#define NVIC_EnableIRQ __eclic_enable_interrupt +#define NVIC_DisableIRQ __eclic_disable_interrupt + +static inline void __eclic_enable_interrupt (uint32_t irq) { + *(volatile uint8_t*)(ECLIC_INTERRUPT_ENABLE_BASE + (irq * 4)) = 1; +} + +static inline void __eclic_disable_interrupt (uint32_t irq){ + *(volatile uint8_t*)(ECLIC_INTERRUPT_ENABLE_BASE + (irq * 4)) = 0; +} + +#else +#error "Unsupported MCUs" +#endif + +#include "device/dcd.h" + +//--------------------------------------------------------------------+ +// MACRO TYPEDEF CONSTANT ENUM +//--------------------------------------------------------------------+ + +// On STM32 we associate Port0 to OTG_FS, and Port1 to OTG_HS +#if TUD_OPT_RHPORT == 0 +#define EP_MAX EP_MAX_FS +#define EP_FIFO_SIZE EP_FIFO_SIZE_FS +#define RHPORT_REGS_BASE USB_OTG_FS_PERIPH_BASE +#define RHPORT_IRQn OTG_FS_IRQn + +#else +#define EP_MAX EP_MAX_HS +#define EP_FIFO_SIZE EP_FIFO_SIZE_HS +#define RHPORT_REGS_BASE USB_OTG_HS_PERIPH_BASE +#define RHPORT_IRQn OTG_HS_IRQn + +#endif + +#define GLOBAL_BASE(_port) ((USB_OTG_GlobalTypeDef*) RHPORT_REGS_BASE) +#define DEVICE_BASE(_port) (USB_OTG_DeviceTypeDef *) (RHPORT_REGS_BASE + USB_OTG_DEVICE_BASE) +#define OUT_EP_BASE(_port) (USB_OTG_OUTEndpointTypeDef *) (RHPORT_REGS_BASE + USB_OTG_OUT_ENDPOINT_BASE) +#define IN_EP_BASE(_port) (USB_OTG_INEndpointTypeDef *) (RHPORT_REGS_BASE + USB_OTG_IN_ENDPOINT_BASE) +#define FIFO_BASE(_port, _x) ((volatile uint32_t *) (RHPORT_REGS_BASE + USB_OTG_FIFO_BASE + (_x) * USB_OTG_FIFO_SIZE)) + +enum +{ + DCD_HIGH_SPEED = 0, // Highspeed mode + DCD_FULL_SPEED_USE_HS = 1, // Full speed in Highspeed port (probably with internal PHY) + DCD_FULL_SPEED = 3, // Full speed with internal PHY +}; + +static TU_ATTR_ALIGNED(4) uint32_t _setup_packet[2]; + +typedef struct { + uint8_t * buffer; + tu_fifo_t * ff; + uint16_t total_len; + uint16_t max_size; + uint8_t interval; +} xfer_ctl_t; + +typedef volatile uint32_t * usb_fifo_t; + +xfer_ctl_t xfer_status[EP_MAX][2]; +#define XFER_CTL_BASE(_ep, _dir) &xfer_status[_ep][_dir] + +// EP0 transfers are limited to 1 packet - larger sizes has to be split +static uint16_t ep0_pending[2]; // Index determines direction as tusb_dir_t type + +// TX FIFO RAM allocation so far in words - RX FIFO size is readily available from usb_otg->GRXFSIZ +static uint16_t _allocated_fifo_words_tx; // TX FIFO size in words (IN EPs) +static bool _out_ep_closed; // Flag to check if RX FIFO size needs an update (reduce its size) + +// Calculate the RX FIFO size according to recommendations from reference manual +static inline uint16_t calc_rx_ff_size(uint16_t ep_size) +{ + return 15 + 2*(ep_size/4) + 2*EP_MAX; +} + +static void update_grxfsiz(uint8_t rhport) +{ + (void) rhport; + + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + + // Determine largest EP size for RX FIFO + uint16_t max_epsize = 0; + for (uint8_t epnum = 0; epnum < EP_MAX; epnum++) + { + max_epsize = tu_max16(max_epsize, xfer_status[epnum][TUSB_DIR_OUT].max_size); + } + + // Update size of RX FIFO + usb_otg->GRXFSIZ = calc_rx_ff_size(max_epsize); +} + +// Setup the control endpoint 0. +static void bus_reset(uint8_t rhport) +{ + (void) rhport; + + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + tu_memclr(xfer_status, sizeof(xfer_status)); + _out_ep_closed = false; + + for(uint8_t n = 0; n < EP_MAX; n++) { + out_ep[n].DOEPCTL |= USB_OTG_DOEPCTL_SNAK; + } + + // clear device address + dev->DCFG &= ~USB_OTG_DCFG_DAD_Msk; + + // TODO should probably assign value when reset rather than OR + dev->DAINTMSK |= (1 << USB_OTG_DAINTMSK_OEPM_Pos) | (1 << USB_OTG_DAINTMSK_IEPM_Pos); + dev->DOEPMSK |= USB_OTG_DOEPMSK_STUPM | USB_OTG_DOEPMSK_XFRCM; + dev->DIEPMSK |= USB_OTG_DIEPMSK_TOM | USB_OTG_DIEPMSK_XFRCM; + + // "USB Data FIFOs" section in reference manual + // Peripheral FIFO architecture + // + // The FIFO is split up in a lower part where the RX FIFO is located and an upper part where the TX FIFOs start. + // We do this to allow the RX FIFO to grow dynamically which is possible since the free space is located + // between the RX and TX FIFOs. This is required by ISO OUT EPs which need a bigger FIFO than the standard + // configuration done below. + // + // Dynamically FIFO sizes are of interest only for ISO EPs since all others are usually not opened and closed. + // All EPs other than ISO are opened as soon as the driver starts up i.e. when the host sends a + // configure interface command. Hence, all IN EPs other the ISO will be located at the top. IN ISO EPs are usually + // opened when the host sends an additional command: setInterface. At this point in time + // the ISO EP will be located next to the free space and can change its size. In case more IN EPs change its size + // an additional memory + // + // --------------- 320 or 1024 ( 1280 or 4096 bytes ) + // | IN FIFO 0 | + // --------------- (320 or 1024) - 16 + // | IN FIFO 1 | + // --------------- (320 or 1024) - 16 - x + // | . . . . | + // --------------- (320 or 1024) - 16 - x - y - ... - z + // | IN FIFO MAX | + // --------------- + // | FREE | + // --------------- GRXFSIZ + // | OUT FIFO | + // | ( Shared ) | + // --------------- 0 + // + // According to "FIFO RAM allocation" section in RM, FIFO RAM are allocated as follows (each word 32-bits): + // - Each EP IN needs at least max packet size, 16 words is sufficient for EP0 IN + // + // - All EP OUT shared a unique OUT FIFO which uses + // - 13 for setup packets + control words (up to 3 setup packets). + // - 1 for global NAK (not required/used here). + // - Largest-EPsize / 4 + 1. ( FS: 64 bytes, HS: 512 bytes). Recommended is "2 x (Largest-EPsize/4) + 1" + // - 2 for each used OUT endpoint + // + // Therefore GRXFSIZ = 13 + 1 + 1 + 2 x (Largest-EPsize/4) + 2 x EPOUTnum + // - FullSpeed (64 Bytes ): GRXFSIZ = 15 + 2 x 16 + 2 x EP_MAX = 47 + 2 x EP_MAX + // - Highspeed (512 bytes): GRXFSIZ = 15 + 2 x 128 + 2 x EP_MAX = 271 + 2 x EP_MAX + // + // NOTE: Largest-EPsize & EPOUTnum is actual used endpoints in configuration. Since DCD has no knowledge + // of the overall picture yet. We will use the worst scenario: largest possible + EP_MAX + // + // For Isochronous, largest EP size can be 1023/1024 for FS/HS respectively. In addition if multiple ISO + // are enabled at least "2 x (Largest-EPsize/4) + 1" are recommended. Maybe provide a macro for application to + // overwrite this. + + usb_otg->GRXFSIZ = calc_rx_ff_size(TUD_OPT_HIGH_SPEED ? 512 : 64); + + _allocated_fifo_words_tx = 16; + + // Control IN uses FIFO 0 with 64 bytes ( 16 32-bit word ) + usb_otg->DIEPTXF0_HNPTXFSIZ = (16 << USB_OTG_TX0FD_Pos) | (EP_FIFO_SIZE/4 - _allocated_fifo_words_tx); + + // Fixed control EP0 size to 64 bytes + in_ep[0].DIEPCTL &= ~(0x03 << USB_OTG_DIEPCTL_MPSIZ_Pos); + xfer_status[0][TUSB_DIR_OUT].max_size = xfer_status[0][TUSB_DIR_IN].max_size = 64; + + out_ep[0].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos); + + usb_otg->GINTMSK |= USB_OTG_GINTMSK_OEPINT | USB_OTG_GINTMSK_IEPINT; +} + +// Set turn-around timeout according to link speed +extern uint32_t SystemCoreClock; +static void set_turnaround(USB_OTG_GlobalTypeDef * usb_otg, tusb_speed_t speed) +{ + usb_otg->GUSBCFG &= ~USB_OTG_GUSBCFG_TRDT; + + if ( speed == TUSB_SPEED_HIGH ) + { + // Use fixed 0x09 for Highspeed + usb_otg->GUSBCFG |= (0x09 << USB_OTG_GUSBCFG_TRDT_Pos); + } + else + { + // Turnaround timeout depends on the MCU clock + uint32_t turnaround; + + TU_LOG_INT(2, SystemCoreClock); + + if ( SystemCoreClock >= 32000000U ) + turnaround = 0x6U; + else if ( SystemCoreClock >= 27500000U ) + turnaround = 0x7U; + else if ( SystemCoreClock >= 24000000U ) + turnaround = 0x8U; + else if ( SystemCoreClock >= 21800000U ) + turnaround = 0x9U; + else if ( SystemCoreClock >= 20000000U ) + turnaround = 0xAU; + else if ( SystemCoreClock >= 18500000U ) + turnaround = 0xBU; + else if ( SystemCoreClock >= 17200000U ) + turnaround = 0xCU; + else if ( SystemCoreClock >= 16000000U ) + turnaround = 0xDU; + else if ( SystemCoreClock >= 15000000U ) + turnaround = 0xEU; + else + turnaround = 0xFU; + + // Fullspeed depends on MCU clocks, but we will use 0x06 for 32+ Mhz + usb_otg->GUSBCFG |= (turnaround << USB_OTG_GUSBCFG_TRDT_Pos); + } +} + +static tusb_speed_t get_speed(uint8_t rhport) +{ + (void) rhport; + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + uint32_t const enum_spd = (dev->DSTS & USB_OTG_DSTS_ENUMSPD_Msk) >> USB_OTG_DSTS_ENUMSPD_Pos; + return (enum_spd == DCD_HIGH_SPEED) ? TUSB_SPEED_HIGH : TUSB_SPEED_FULL; +} + +static void set_speed(uint8_t rhport, tusb_speed_t speed) +{ + uint32_t bitvalue; + + if ( rhport == 1 ) + { + bitvalue = ((TUSB_SPEED_HIGH == speed) ? DCD_HIGH_SPEED : DCD_FULL_SPEED_USE_HS); + } + else + { + bitvalue = DCD_FULL_SPEED; + } + + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + + // Clear and set speed bits + dev->DCFG &= ~(3 << USB_OTG_DCFG_DSPD_Pos); + dev->DCFG |= (bitvalue << USB_OTG_DCFG_DSPD_Pos); +} + +#if defined(USB_HS_PHYC) +static bool USB_HS_PHYCInit(void) +{ + USB_HS_PHYC_GlobalTypeDef *usb_hs_phyc = (USB_HS_PHYC_GlobalTypeDef*) USB_HS_PHYC_CONTROLLER_BASE; + + // Enable LDO + usb_hs_phyc->USB_HS_PHYC_LDO |= USB_HS_PHYC_LDO_ENABLE; + + // Wait until LDO ready + while ( 0 == (usb_hs_phyc->USB_HS_PHYC_LDO & USB_HS_PHYC_LDO_STATUS) ) {} + + uint32_t phyc_pll = 0; + + // TODO Try to get HSE_VALUE from registers instead of depending CFLAGS + switch ( HSE_VALUE ) + { + case 12000000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_12MHZ ; break; + case 12500000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_12_5MHZ ; break; + case 16000000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_16MHZ ; break; + case 24000000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_24MHZ ; break; + case 25000000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_25MHZ ; break; + case 32000000: phyc_pll = USB_HS_PHYC_PLL1_PLLSEL_Msk ; break; // Value not defined in header + default: + TU_ASSERT(0); + } + usb_hs_phyc->USB_HS_PHYC_PLL = phyc_pll; + + // Control the tuning interface of the High Speed PHY + // Use magic value (USB_HS_PHYC_TUNE_VALUE) from ST driver + usb_hs_phyc->USB_HS_PHYC_TUNE |= 0x00000F13U; + + // Enable PLL internal PHY + usb_hs_phyc->USB_HS_PHYC_PLL |= USB_HS_PHYC_PLL_PLLEN; + + // Original ST code has 2 ms delay for PLL stabilization. + // Primitive test shows that more than 10 USB un/replug cycle showed no error with enumeration + + return true; +} +#endif + +static void edpt_schedule_packets(uint8_t rhport, uint8_t const epnum, uint8_t const dir, uint16_t const num_packets, uint16_t total_bytes) +{ + (void) rhport; + + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + // EP0 is limited to one packet each xfer + // We use multiple transaction of xfer->max_size length to get a whole transfer done + if(epnum == 0) { + xfer_ctl_t * const xfer = XFER_CTL_BASE(epnum, dir); + total_bytes = tu_min16(ep0_pending[dir], xfer->max_size); + ep0_pending[dir] -= total_bytes; + } + + // IN and OUT endpoint xfers are interrupt-driven, we just schedule them here. + if(dir == TUSB_DIR_IN) { + // A full IN transfer (multiple packets, possibly) triggers XFRC. + in_ep[epnum].DIEPTSIZ = (num_packets << USB_OTG_DIEPTSIZ_PKTCNT_Pos) | + ((total_bytes << USB_OTG_DIEPTSIZ_XFRSIZ_Pos) & USB_OTG_DIEPTSIZ_XFRSIZ_Msk); + + in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK; + // For ISO endpoint set correct odd/even bit for next frame. + if ((in_ep[epnum].DIEPCTL & USB_OTG_DIEPCTL_EPTYP) == USB_OTG_DIEPCTL_EPTYP_0 && (XFER_CTL_BASE(epnum, dir))->interval == 1) + { + // Take odd/even bit from frame counter. + uint32_t const odd_frame_now = (dev->DSTS & (1u << USB_OTG_DSTS_FNSOF_Pos)); + in_ep[epnum].DIEPCTL |= (odd_frame_now ? USB_OTG_DIEPCTL_SD0PID_SEVNFRM_Msk : USB_OTG_DIEPCTL_SODDFRM_Msk); + } + // Enable fifo empty interrupt only if there are something to put in the fifo. + if(total_bytes != 0) { + dev->DIEPEMPMSK |= (1 << epnum); + } + } else { + // A full OUT transfer (multiple packets, possibly) triggers XFRC. + out_ep[epnum].DOEPTSIZ &= ~(USB_OTG_DOEPTSIZ_PKTCNT_Msk | USB_OTG_DOEPTSIZ_XFRSIZ); + out_ep[epnum].DOEPTSIZ |= (num_packets << USB_OTG_DOEPTSIZ_PKTCNT_Pos) | + ((total_bytes << USB_OTG_DOEPTSIZ_XFRSIZ_Pos) & USB_OTG_DOEPTSIZ_XFRSIZ_Msk); + + out_ep[epnum].DOEPCTL |= USB_OTG_DOEPCTL_EPENA | USB_OTG_DOEPCTL_CNAK; + if ((out_ep[epnum].DOEPCTL & USB_OTG_DOEPCTL_EPTYP) == USB_OTG_DOEPCTL_EPTYP_0 && (XFER_CTL_BASE(epnum, dir))->interval == 1) + { + // Take odd/even bit from frame counter. + uint32_t const odd_frame_now = (dev->DSTS & (1u << USB_OTG_DSTS_FNSOF_Pos)); + out_ep[epnum].DOEPCTL |= (odd_frame_now ? USB_OTG_DOEPCTL_SD0PID_SEVNFRM_Msk : USB_OTG_DOEPCTL_SODDFRM_Msk); + } + } +} + +/*------------------------------------------------------------------*/ +/* Controller API + *------------------------------------------------------------------*/ +void dcd_init (uint8_t rhport) +{ + // Programming model begins in the last section of the chapter on the USB + // peripheral in each Reference Manual. + + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + + // No HNP/SRP (no OTG support), program timeout later. + if ( rhport == 1 ) + { + // On selected MCUs HS port1 can be used with external PHY via ULPI interface +#if CFG_TUSB_RHPORT1_MODE & OPT_MODE_HIGH_SPEED + // deactivate internal PHY + usb_otg->GCCFG &= ~USB_OTG_GCCFG_PWRDWN; + + // Init The UTMI Interface + usb_otg->GUSBCFG &= ~(USB_OTG_GUSBCFG_TSDPS | USB_OTG_GUSBCFG_ULPIFSLS | USB_OTG_GUSBCFG_PHYSEL); + + // Select default internal VBUS Indicator and Drive for ULPI + usb_otg->GUSBCFG &= ~(USB_OTG_GUSBCFG_ULPIEVBUSD | USB_OTG_GUSBCFG_ULPIEVBUSI); +#else + usb_otg->GUSBCFG |= USB_OTG_GUSBCFG_PHYSEL; +#endif + +#if defined(USB_HS_PHYC) + // Highspeed with embedded UTMI PHYC + + // Select UTMI Interface + usb_otg->GUSBCFG &= ~USB_OTG_GUSBCFG_ULPI_UTMI_SEL; + usb_otg->GCCFG |= USB_OTG_GCCFG_PHYHSEN; + + // Enables control of a High Speed USB PHY + USB_HS_PHYCInit(); +#endif + } else + { + // Enable internal PHY + usb_otg->GUSBCFG |= USB_OTG_GUSBCFG_PHYSEL; + } + + // Reset core after selecting PHY + // Wait AHB IDLE, reset then wait until it is cleared + while ((usb_otg->GRSTCTL & USB_OTG_GRSTCTL_AHBIDL) == 0U) {} + usb_otg->GRSTCTL |= USB_OTG_GRSTCTL_CSRST; + while ((usb_otg->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST) {} + + // Restart PHY clock + *((volatile uint32_t *)(RHPORT_REGS_BASE + USB_OTG_PCGCCTL_BASE)) = 0; + + // Clear all interrupts + usb_otg->GINTSTS |= usb_otg->GINTSTS; + + // Required as part of core initialization. + // TODO: How should mode mismatch be handled? It will cause + // the core to stop working/require reset. + usb_otg->GINTMSK |= USB_OTG_GINTMSK_OTGINT | USB_OTG_GINTMSK_MMISM; + + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + + // If USB host misbehaves during status portion of control xfer + // (non zero-length packet), send STALL back and discard. + dev->DCFG |= USB_OTG_DCFG_NZLSOHSK; + + set_speed(rhport, TUD_OPT_HIGH_SPEED ? TUSB_SPEED_HIGH : TUSB_SPEED_FULL); + + // Enable internal USB transceiver, unless using HS core (port 1) with external PHY. + if (!(rhport == 1 && (CFG_TUSB_RHPORT1_MODE & OPT_MODE_HIGH_SPEED))) usb_otg->GCCFG |= USB_OTG_GCCFG_PWRDWN; + + usb_otg->GINTMSK |= USB_OTG_GINTMSK_USBRST | USB_OTG_GINTMSK_ENUMDNEM | + USB_OTG_GINTMSK_USBSUSPM | USB_OTG_GINTMSK_WUIM | + USB_OTG_GINTMSK_RXFLVLM | (USE_SOF ? USB_OTG_GINTMSK_SOFM : 0); + + // Enable global interrupt + usb_otg->GAHBCFG |= USB_OTG_GAHBCFG_GINT; + + dcd_connect(rhport); +} + +void dcd_int_enable (uint8_t rhport) +{ + (void) rhport; + NVIC_EnableIRQ(RHPORT_IRQn); +} + +void dcd_int_disable (uint8_t rhport) +{ + (void) rhport; + NVIC_DisableIRQ(RHPORT_IRQn); +} + +void dcd_set_address (uint8_t rhport, uint8_t dev_addr) +{ + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + dev->DCFG = (dev->DCFG & ~USB_OTG_DCFG_DAD_Msk) | (dev_addr << USB_OTG_DCFG_DAD_Pos); + + // Response with status after changing device address + dcd_edpt_xfer(rhport, tu_edpt_addr(0, TUSB_DIR_IN), NULL, 0); +} + +void dcd_remote_wakeup(uint8_t rhport) +{ + (void) rhport; + + // TODO must manually clear this bit after 1-15 ms + // USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + // dev->DCTL |= USB_OTG_DCTL_RWUSIG; +} + +void dcd_connect(uint8_t rhport) +{ + (void) rhport; + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + dev->DCTL &= ~USB_OTG_DCTL_SDIS; +} + +void dcd_disconnect(uint8_t rhport) +{ + (void) rhport; + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + dev->DCTL |= USB_OTG_DCTL_SDIS; +} + + +/*------------------------------------------------------------------*/ +/* DCD Endpoint port + *------------------------------------------------------------------*/ + +bool dcd_edpt_open (uint8_t rhport, tusb_desc_endpoint_t const * desc_edpt) +{ + (void) rhport; + + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + uint8_t const epnum = tu_edpt_number(desc_edpt->bEndpointAddress); + uint8_t const dir = tu_edpt_dir(desc_edpt->bEndpointAddress); + + TU_ASSERT(epnum < EP_MAX); + + xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir); + xfer->max_size = desc_edpt->wMaxPacketSize.size; + xfer->interval = desc_edpt->bInterval; + + uint16_t const fifo_size = (desc_edpt->wMaxPacketSize.size + 3) / 4; // Round up to next full word + + if(dir == TUSB_DIR_OUT) + { + // Calculate required size of RX FIFO + uint16_t const sz = calc_rx_ff_size(4*fifo_size); + + // If size_rx needs to be extended check if possible and if so enlarge it + if (usb_otg->GRXFSIZ < sz) + { + TU_ASSERT(sz + _allocated_fifo_words_tx <= EP_FIFO_SIZE/4); + + // Enlarge RX FIFO + usb_otg->GRXFSIZ = sz; + } + + out_ep[epnum].DOEPCTL |= (1 << USB_OTG_DOEPCTL_USBAEP_Pos) | + (desc_edpt->bmAttributes.xfer << USB_OTG_DOEPCTL_EPTYP_Pos) | + (desc_edpt->wMaxPacketSize.size << USB_OTG_DOEPCTL_MPSIZ_Pos); + + dev->DAINTMSK |= (1 << (USB_OTG_DAINTMSK_OEPM_Pos + epnum)); + } + else + { + // "USB Data FIFOs" section in reference manual + // Peripheral FIFO architecture + // + // --------------- 320 or 1024 ( 1280 or 4096 bytes ) + // | IN FIFO 0 | + // --------------- (320 or 1024) - 16 + // | IN FIFO 1 | + // --------------- (320 or 1024) - 16 - x + // | . . . . | + // --------------- (320 or 1024) - 16 - x - y - ... - z + // | IN FIFO MAX | + // --------------- + // | FREE | + // --------------- GRXFSIZ + // | OUT FIFO | + // | ( Shared ) | + // --------------- 0 + // + // In FIFO is allocated by following rules: + // - IN EP 1 gets FIFO 1, IN EP "n" gets FIFO "n". + + // Check if free space is available + TU_ASSERT(_allocated_fifo_words_tx + fifo_size + usb_otg->GRXFSIZ <= EP_FIFO_SIZE/4); + + _allocated_fifo_words_tx += fifo_size; + + TU_LOG(2, " Allocated %u bytes at offset %u", fifo_size*4, EP_FIFO_SIZE-_allocated_fifo_words_tx*4); + + // DIEPTXF starts at FIFO #1. + // Both TXFD and TXSA are in unit of 32-bit words. + usb_otg->DIEPTXF[epnum - 1] = (fifo_size << USB_OTG_DIEPTXF_INEPTXFD_Pos) | (EP_FIFO_SIZE/4 - _allocated_fifo_words_tx); + + in_ep[epnum].DIEPCTL |= (1 << USB_OTG_DIEPCTL_USBAEP_Pos) | + (epnum << USB_OTG_DIEPCTL_TXFNUM_Pos) | + (desc_edpt->bmAttributes.xfer << USB_OTG_DIEPCTL_EPTYP_Pos) | + (desc_edpt->bmAttributes.xfer != TUSB_XFER_ISOCHRONOUS ? USB_OTG_DOEPCTL_SD0PID_SEVNFRM : 0) | + (desc_edpt->wMaxPacketSize.size << USB_OTG_DIEPCTL_MPSIZ_Pos); + + dev->DAINTMSK |= (1 << (USB_OTG_DAINTMSK_IEPM_Pos + epnum)); + } + + return true; +} + +bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t total_bytes) +{ + uint8_t const epnum = tu_edpt_number(ep_addr); + uint8_t const dir = tu_edpt_dir(ep_addr); + + xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir); + xfer->buffer = buffer; + xfer->ff = NULL; + xfer->total_len = total_bytes; + + // EP0 can only handle one packet + if(epnum == 0) { + ep0_pending[dir] = total_bytes; + // Schedule the first transaction for EP0 transfer + edpt_schedule_packets(rhport, epnum, dir, 1, ep0_pending[dir]); + return true; + } + + uint16_t num_packets = (total_bytes / xfer->max_size); + uint16_t const short_packet_size = total_bytes % xfer->max_size; + + // Zero-size packet is special case. + if(short_packet_size > 0 || (total_bytes == 0)) { + num_packets++; + } + + // Schedule packets to be sent within interrupt + edpt_schedule_packets(rhport, epnum, dir, num_packets, total_bytes); + + return true; +} + +// The number of bytes has to be given explicitly to allow more flexible control of how many +// bytes should be written and second to keep the return value free to give back a boolean +// success message. If total_bytes is too big, the FIFO will copy only what is available +// into the USB buffer! +bool dcd_edpt_xfer_fifo (uint8_t rhport, uint8_t ep_addr, tu_fifo_t * ff, uint16_t total_bytes) +{ + // USB buffers always work in bytes so to avoid unnecessary divisions we demand item_size = 1 + TU_ASSERT(ff->item_size == 1); + + uint8_t const epnum = tu_edpt_number(ep_addr); + uint8_t const dir = tu_edpt_dir(ep_addr); + + xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, dir); + xfer->buffer = NULL; + xfer->ff = ff; + xfer->total_len = total_bytes; + + uint16_t num_packets = (total_bytes / xfer->max_size); + uint16_t const short_packet_size = total_bytes % xfer->max_size; + + // Zero-size packet is special case. + if(short_packet_size > 0 || (total_bytes == 0)) num_packets++; + + // Schedule packets to be sent within interrupt + edpt_schedule_packets(rhport, epnum, dir, num_packets, total_bytes); + + return true; +} + +static void dcd_edpt_disable (uint8_t rhport, uint8_t ep_addr, bool stall) +{ + (void) rhport; + + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + uint8_t const epnum = tu_edpt_number(ep_addr); + uint8_t const dir = tu_edpt_dir(ep_addr); + + if(dir == TUSB_DIR_IN) { + // Only disable currently enabled non-control endpoint + if ( (epnum == 0) || !(in_ep[epnum].DIEPCTL & USB_OTG_DIEPCTL_EPENA) ){ + in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_SNAK | (stall ? USB_OTG_DIEPCTL_STALL : 0); + } else { + // Stop transmitting packets and NAK IN xfers. + in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_SNAK; + while((in_ep[epnum].DIEPINT & USB_OTG_DIEPINT_INEPNE) == 0); + + // Disable the endpoint. + in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPDIS | (stall ? USB_OTG_DIEPCTL_STALL : 0); + while((in_ep[epnum].DIEPINT & USB_OTG_DIEPINT_EPDISD_Msk) == 0); + in_ep[epnum].DIEPINT = USB_OTG_DIEPINT_EPDISD; + } + + // Flush the FIFO, and wait until we have confirmed it cleared. + usb_otg->GRSTCTL |= (epnum << USB_OTG_GRSTCTL_TXFNUM_Pos); + usb_otg->GRSTCTL |= USB_OTG_GRSTCTL_TXFFLSH; + while((usb_otg->GRSTCTL & USB_OTG_GRSTCTL_TXFFLSH_Msk) != 0); + } else { + // Only disable currently enabled non-control endpoint + if ( (epnum == 0) || !(out_ep[epnum].DOEPCTL & USB_OTG_DOEPCTL_EPENA) ){ + out_ep[epnum].DOEPCTL |= stall ? USB_OTG_DOEPCTL_STALL : 0; + } else { + // Asserting GONAK is required to STALL an OUT endpoint. + // Simpler to use polling here, we don't use the "B"OUTNAKEFF interrupt + // anyway, and it can't be cleared by user code. If this while loop never + // finishes, we have bigger problems than just the stack. + dev->DCTL |= USB_OTG_DCTL_SGONAK; + while((usb_otg->GINTSTS & USB_OTG_GINTSTS_BOUTNAKEFF_Msk) == 0); + + // Ditto here- disable the endpoint. + out_ep[epnum].DOEPCTL |= USB_OTG_DOEPCTL_EPDIS | (stall ? USB_OTG_DOEPCTL_STALL : 0); + while((out_ep[epnum].DOEPINT & USB_OTG_DOEPINT_EPDISD_Msk) == 0); + out_ep[epnum].DOEPINT = USB_OTG_DOEPINT_EPDISD; + + // Allow other OUT endpoints to keep receiving. + dev->DCTL |= USB_OTG_DCTL_CGONAK; + } + } +} + +/** + * Close an endpoint. + */ +void dcd_edpt_close (uint8_t rhport, uint8_t ep_addr) +{ + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + + uint8_t const epnum = tu_edpt_number(ep_addr); + uint8_t const dir = tu_edpt_dir(ep_addr); + + dcd_edpt_disable(rhport, ep_addr, false); + + // Update max_size + xfer_status[epnum][dir].max_size = 0; // max_size = 0 marks a disabled EP - required for changing FIFO allocation + + if (dir == TUSB_DIR_IN) + { + uint16_t const fifo_size = (usb_otg->DIEPTXF[epnum - 1] & USB_OTG_DIEPTXF_INEPTXFD_Msk) >> USB_OTG_DIEPTXF_INEPTXFD_Pos; + uint16_t const fifo_start = (usb_otg->DIEPTXF[epnum - 1] & USB_OTG_DIEPTXF_INEPTXSA_Msk) >> USB_OTG_DIEPTXF_INEPTXSA_Pos; + // For now only the last opened endpoint can be closed without fuss. + TU_ASSERT(fifo_start == EP_FIFO_SIZE/4 - _allocated_fifo_words_tx,); + _allocated_fifo_words_tx -= fifo_size; + } + else + { + _out_ep_closed = true; // Set flag such that RX FIFO gets reduced in size once RX FIFO is empty + } +} + +void dcd_edpt_stall (uint8_t rhport, uint8_t ep_addr) +{ + dcd_edpt_disable(rhport, ep_addr, true); +} + +void dcd_edpt_clear_stall (uint8_t rhport, uint8_t ep_addr) +{ + (void) rhport; + + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + uint8_t const epnum = tu_edpt_number(ep_addr); + uint8_t const dir = tu_edpt_dir(ep_addr); + + if(dir == TUSB_DIR_IN) { + in_ep[epnum].DIEPCTL &= ~USB_OTG_DIEPCTL_STALL; + + uint8_t eptype = (in_ep[epnum].DIEPCTL & USB_OTG_DIEPCTL_EPTYP_Msk) >> USB_OTG_DIEPCTL_EPTYP_Pos; + // Required by USB spec to reset DATA toggle bit to DATA0 on interrupt and bulk endpoints. + if(eptype == 2 || eptype == 3) { + in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_SD0PID_SEVNFRM; + } + } else { + out_ep[epnum].DOEPCTL &= ~USB_OTG_DOEPCTL_STALL; + + uint8_t eptype = (out_ep[epnum].DOEPCTL & USB_OTG_DOEPCTL_EPTYP_Msk) >> USB_OTG_DOEPCTL_EPTYP_Pos; + // Required by USB spec to reset DATA toggle bit to DATA0 on interrupt and bulk endpoints. + if(eptype == 2 || eptype == 3) { + out_ep[epnum].DOEPCTL |= USB_OTG_DOEPCTL_SD0PID_SEVNFRM; + } + } +} + +/*------------------------------------------------------------------*/ + +// Read a single data packet from receive FIFO +static void read_fifo_packet(uint8_t rhport, uint8_t * dst, uint16_t len) +{ + (void) rhport; + + usb_fifo_t rx_fifo = FIFO_BASE(rhport, 0); + + // Reading full available 32 bit words from fifo + uint16_t full_words = len >> 2; + for(uint16_t i = 0; i < full_words; i++) { + uint32_t tmp = *rx_fifo; + dst[0] = tmp & 0x000000FF; + dst[1] = (tmp & 0x0000FF00) >> 8; + dst[2] = (tmp & 0x00FF0000) >> 16; + dst[3] = (tmp & 0xFF000000) >> 24; + dst += 4; + } + + // Read the remaining 1-3 bytes from fifo + uint8_t bytes_rem = len & 0x03; + if(bytes_rem != 0) { + uint32_t tmp = *rx_fifo; + dst[0] = tmp & 0x000000FF; + if(bytes_rem > 1) { + dst[1] = (tmp & 0x0000FF00) >> 8; + } + if(bytes_rem > 2) { + dst[2] = (tmp & 0x00FF0000) >> 16; + } + } +} + +// Write a single data packet to EPIN FIFO +static void write_fifo_packet(uint8_t rhport, uint8_t fifo_num, uint8_t * src, uint16_t len) +{ + (void) rhport; + + usb_fifo_t tx_fifo = FIFO_BASE(rhport, fifo_num); + + // Pushing full available 32 bit words to fifo + uint16_t full_words = len >> 2; + for(uint16_t i = 0; i < full_words; i++){ + *tx_fifo = (src[3] << 24) | (src[2] << 16) | (src[1] << 8) | src[0]; + src += 4; + } + + // Write the remaining 1-3 bytes into fifo + uint8_t bytes_rem = len & 0x03; + if(bytes_rem){ + uint32_t tmp_word = 0; + tmp_word |= src[0]; + if(bytes_rem > 1){ + tmp_word |= src[1] << 8; + } + if(bytes_rem > 2){ + tmp_word |= src[2] << 16; + } + *tx_fifo = tmp_word; + } +} + +static void handle_rxflvl_ints(uint8_t rhport, USB_OTG_OUTEndpointTypeDef * out_ep) { + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + usb_fifo_t rx_fifo = FIFO_BASE(rhport, 0); + + // Pop control word off FIFO + uint32_t ctl_word = usb_otg->GRXSTSP; + uint8_t pktsts = (ctl_word & USB_OTG_GRXSTSP_PKTSTS_Msk) >> USB_OTG_GRXSTSP_PKTSTS_Pos; + uint8_t epnum = (ctl_word & USB_OTG_GRXSTSP_EPNUM_Msk) >> USB_OTG_GRXSTSP_EPNUM_Pos; + uint16_t bcnt = (ctl_word & USB_OTG_GRXSTSP_BCNT_Msk) >> USB_OTG_GRXSTSP_BCNT_Pos; + + switch(pktsts) { + case 0x01: // Global OUT NAK (Interrupt) + break; + + case 0x02: // Out packet recvd + { + xfer_ctl_t * xfer = XFER_CTL_BASE(epnum, TUSB_DIR_OUT); + + // Read packet off RxFIFO + if (xfer->ff) + { + // Ring buffer + tu_fifo_write_n_const_addr_full_words(xfer->ff, (const void *) rx_fifo, bcnt); + } + else + { + // Linear buffer + read_fifo_packet(rhport, xfer->buffer, bcnt); + + // Increment pointer to xfer data + xfer->buffer += bcnt; + } + + // Truncate transfer length in case of short packet + if(bcnt < xfer->max_size) { + xfer->total_len -= (out_ep[epnum].DOEPTSIZ & USB_OTG_DOEPTSIZ_XFRSIZ_Msk) >> USB_OTG_DOEPTSIZ_XFRSIZ_Pos; + if(epnum == 0) { + xfer->total_len -= ep0_pending[TUSB_DIR_OUT]; + ep0_pending[TUSB_DIR_OUT] = 0; + } + } + } + break; + + case 0x03: // Out packet done (Interrupt) + break; + + case 0x04: // Setup packet done (Interrupt) + out_ep[epnum].DOEPTSIZ |= (3 << USB_OTG_DOEPTSIZ_STUPCNT_Pos); + break; + + case 0x06: // Setup packet recvd + // We can receive up to three setup packets in succession, but + // only the last one is valid. + _setup_packet[0] = (* rx_fifo); + _setup_packet[1] = (* rx_fifo); + break; + + default: // Invalid + TU_BREAKPOINT(); + break; + } +} + +static void handle_epout_ints(uint8_t rhport, USB_OTG_DeviceTypeDef * dev, USB_OTG_OUTEndpointTypeDef * out_ep) { + // DAINT for a given EP clears when DOEPINTx is cleared. + // OEPINT will be cleared when DAINT's out bits are cleared. + for(uint8_t n = 0; n < EP_MAX; n++) { + xfer_ctl_t * xfer = XFER_CTL_BASE(n, TUSB_DIR_OUT); + + if(dev->DAINT & (1 << (USB_OTG_DAINT_OEPINT_Pos + n))) { + // SETUP packet Setup Phase done. + if(out_ep[n].DOEPINT & USB_OTG_DOEPINT_STUP) { + out_ep[n].DOEPINT = USB_OTG_DOEPINT_STUP; + dcd_event_setup_received(rhport, (uint8_t*) &_setup_packet[0], true); + } + + // OUT XFER complete + if(out_ep[n].DOEPINT & USB_OTG_DOEPINT_XFRC) { + out_ep[n].DOEPINT = USB_OTG_DOEPINT_XFRC; + + // EP0 can only handle one packet + if((n == 0) && ep0_pending[TUSB_DIR_OUT]) { + // Schedule another packet to be received. + edpt_schedule_packets(rhport, n, TUSB_DIR_OUT, 1, ep0_pending[TUSB_DIR_OUT]); + } else { + dcd_event_xfer_complete(rhport, n, xfer->total_len, XFER_RESULT_SUCCESS, true); + } + } + } + } +} + +static void handle_epin_ints(uint8_t rhport, USB_OTG_DeviceTypeDef * dev, USB_OTG_INEndpointTypeDef * in_ep) { + // DAINT for a given EP clears when DIEPINTx is cleared. + // IEPINT will be cleared when DAINT's out bits are cleared. + for ( uint8_t n = 0; n < EP_MAX; n++ ) + { + xfer_ctl_t *xfer = XFER_CTL_BASE(n, TUSB_DIR_IN); + + if ( dev->DAINT & (1 << (USB_OTG_DAINT_IEPINT_Pos + n)) ) + { + // IN XFER complete (entire xfer). + if ( in_ep[n].DIEPINT & USB_OTG_DIEPINT_XFRC ) + { + in_ep[n].DIEPINT = USB_OTG_DIEPINT_XFRC; + + // EP0 can only handle one packet + if((n == 0) && ep0_pending[TUSB_DIR_IN]) { + // Schedule another packet to be transmitted. + edpt_schedule_packets(rhport, n, TUSB_DIR_IN, 1, ep0_pending[TUSB_DIR_IN]); + } else { + dcd_event_xfer_complete(rhport, n | TUSB_DIR_IN_MASK, xfer->total_len, XFER_RESULT_SUCCESS, true); + } + } + + // XFER FIFO empty + if ( (in_ep[n].DIEPINT & USB_OTG_DIEPINT_TXFE) && (dev->DIEPEMPMSK & (1 << n)) ) + { + // DIEPINT's TXFE bit is read-only, software cannot clear it. + // It will only be cleared by hardware when written bytes is more than + // - 64 bytes or + // - Half of TX FIFO size (configured by DIEPTXF) + + uint16_t remaining_packets = (in_ep[n].DIEPTSIZ & USB_OTG_DIEPTSIZ_PKTCNT_Msk) >> USB_OTG_DIEPTSIZ_PKTCNT_Pos; + + // Process every single packet (only whole packets can be written to fifo) + for(uint16_t i = 0; i < remaining_packets; i++) + { + uint16_t const remaining_bytes = (in_ep[n].DIEPTSIZ & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) >> USB_OTG_DIEPTSIZ_XFRSIZ_Pos; + + // Packet can not be larger than ep max size + uint16_t const packet_size = tu_min16(remaining_bytes, xfer->max_size); + + // It's only possible to write full packets into FIFO. Therefore DTXFSTS register of current + // EP has to be checked if the buffer can take another WHOLE packet + if(packet_size > ((in_ep[n].DTXFSTS & USB_OTG_DTXFSTS_INEPTFSAV_Msk) << 2)) break; + + // Push packet to Tx-FIFO + if (xfer->ff) + { + usb_fifo_t tx_fifo = FIFO_BASE(rhport, n); + tu_fifo_read_n_const_addr_full_words(xfer->ff, (void *) tx_fifo, packet_size); + } + else + { + write_fifo_packet(rhport, n, xfer->buffer, packet_size); + + // Increment pointer to xfer data + xfer->buffer += packet_size; + } + } + + // Turn off TXFE if all bytes are written. + if (((in_ep[n].DIEPTSIZ & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) >> USB_OTG_DIEPTSIZ_XFRSIZ_Pos) == 0) + { + dev->DIEPEMPMSK &= ~(1 << n); + } + } + } + } +} + +void dcd_int_handler(uint8_t rhport) +{ + USB_OTG_GlobalTypeDef * usb_otg = GLOBAL_BASE(rhport); + USB_OTG_DeviceTypeDef * dev = DEVICE_BASE(rhport); + USB_OTG_OUTEndpointTypeDef * out_ep = OUT_EP_BASE(rhport); + USB_OTG_INEndpointTypeDef * in_ep = IN_EP_BASE(rhport); + + uint32_t int_status = usb_otg->GINTSTS; + + if(int_status & USB_OTG_GINTSTS_USBRST) + { + // USBRST is start of reset. + usb_otg->GINTSTS = USB_OTG_GINTSTS_USBRST; + bus_reset(rhport); + } + + if(int_status & USB_OTG_GINTSTS_ENUMDNE) + { + // ENUMDNE is the end of reset where speed of the link is detected + + usb_otg->GINTSTS = USB_OTG_GINTSTS_ENUMDNE; + + tusb_speed_t const speed = get_speed(rhport); + + set_turnaround(usb_otg, speed); + dcd_event_bus_reset(rhport, speed, true); + } + + if(int_status & USB_OTG_GINTSTS_USBSUSP) + { + usb_otg->GINTSTS = USB_OTG_GINTSTS_USBSUSP; + dcd_event_bus_signal(rhport, DCD_EVENT_SUSPEND, true); + } + + if(int_status & USB_OTG_GINTSTS_WKUINT) + { + usb_otg->GINTSTS = USB_OTG_GINTSTS_WKUINT; + dcd_event_bus_signal(rhport, DCD_EVENT_RESUME, true); + } + + if(int_status & USB_OTG_GINTSTS_OTGINT) + { + // OTG INT bit is read-only + uint32_t const otg_int = usb_otg->GOTGINT; + + if (otg_int & USB_OTG_GOTGINT_SEDET) + { + dcd_event_bus_signal(rhport, DCD_EVENT_UNPLUGGED, true); + } + + usb_otg->GOTGINT = otg_int; + } + +#if USE_SOF + if(int_status & USB_OTG_GINTSTS_SOF) + { + usb_otg->GINTSTS = USB_OTG_GINTSTS_SOF; + dcd_event_bus_signal(rhport, DCD_EVENT_SOF, true); + } +#endif + + // RxFIFO non-empty interrupt handling. + if(int_status & USB_OTG_GINTSTS_RXFLVL) + { + // RXFLVL bit is read-only + + // Mask out RXFLVL while reading data from FIFO + usb_otg->GINTMSK &= ~USB_OTG_GINTMSK_RXFLVLM; + + // Loop until all available packets were handled + do + { + handle_rxflvl_ints(rhport, out_ep); + int_status = usb_otg->GINTSTS; + } while(int_status & USB_OTG_GINTSTS_RXFLVL); + + // Manage RX FIFO size + if (_out_ep_closed) + { + update_grxfsiz(rhport); + + // Disable flag + _out_ep_closed = false; + } + + usb_otg->GINTMSK |= USB_OTG_GINTMSK_RXFLVLM; + } + + // OUT endpoint interrupt handling. + if(int_status & USB_OTG_GINTSTS_OEPINT) + { + // OEPINT is read-only + handle_epout_ints(rhport, dev, out_ep); + } + + // IN endpoint interrupt handling. + if(int_status & USB_OTG_GINTSTS_IEPINT) + { + // IEPINT bit read-only + handle_epin_ints(rhport, dev, in_ep); + } + + // // Check for Incomplete isochronous IN transfer + // if(int_status & USB_OTG_GINTSTS_IISOIXFR) { + // printf(" IISOIXFR!\r\n"); + //// TU_LOG2(" IISOIXFR!\r\n"); + // } +} + +#endif |