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1135 lines
27 KiB
1135 lines
27 KiB
/* |
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* usb-stm32f103.c - USB driver for STM32F103 |
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* |
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* Copyright (C) 2016, 2017, 2018 Flying Stone Technology |
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* Author: NIIBE Yutaka <[email protected]> |
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* |
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* This file is a part of Chopstx, a thread library for embedded. |
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* |
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* Chopstx is free software: you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* Chopstx is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* As additional permission under GNU GPL version 3 section 7, you may |
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* distribute non-source form of the Program without the copy of the |
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* GNU GPL normally required by section 4, provided you inform the |
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* receipents of GNU GPL by a written offer. |
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* |
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*/ |
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|
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#include <stdint.h> |
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#include <stdlib.h> |
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|
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#include "sys-stm32f103.h" |
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#include "usb_lld.h" |
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#include "usb_lld_driver.h" |
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|
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#define REG_BASE (0x40005C00UL) /* USB_IP Peripheral Registers base address */ |
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#define PMA_ADDR (0x40006000UL) /* USB_IP Packet Memory Area base address */ |
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|
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/* Control register */ |
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#define CNTR ((volatile uint16_t *)(REG_BASE + 0x40)) |
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/* Interrupt status register */ |
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#define ISTR ((volatile uint16_t *)(REG_BASE + 0x44)) |
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/* Frame number register */ |
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#define FNR ((volatile uint16_t *)(REG_BASE + 0x48)) |
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/* Device address register */ |
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#define DADDR ((volatile uint16_t *)(REG_BASE + 0x4C)) |
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/* Buffer Table address register */ |
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#define BTABLE ((volatile uint16_t *)(REG_BASE + 0x50)) |
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|
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#define ISTR_CTR (0x8000) /* Correct TRansfer (read-only bit) */ |
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#define ISTR_OVR (0x4000) /* OVeR/underrun (clear-only bit) */ |
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#define ISTR_ERR (0x2000) /* ERRor (clear-only bit) */ |
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#define ISTR_WKUP (0x1000) /* WaKe UP (clear-only bit) */ |
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#define ISTR_SUSP (0x0800) /* SUSPend (clear-only bit) */ |
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#define ISTR_RESET (0x0400) /* RESET (clear-only bit) */ |
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#define ISTR_SOF (0x0200) /* Start Of Frame (clear-only bit) */ |
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#define ISTR_ESOF (0x0100) /* Expected Start Of Frame (clear-only bit) */ |
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|
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#define ISTR_DIR (0x0010) /* DIRection of transaction (read-only bit) */ |
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#define ISTR_EP_ID (0x000F) /* EndPoint IDentifier (read-only bit) */ |
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|
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#define CLR_OVR (~ISTR_OVR) /* clear OVeR/underrun bit*/ |
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#define CLR_ERR (~ISTR_ERR) /* clear ERRor bit */ |
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#define CLR_WKUP (~ISTR_WKUP) /* clear WaKe UP bit */ |
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#define CLR_SUSP (~ISTR_SUSP) /* clear SUSPend bit */ |
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#define CLR_RESET (~ISTR_RESET) /* clear RESET bit */ |
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#define CLR_SOF (~ISTR_SOF) /* clear Start Of Frame bit */ |
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#define CLR_ESOF (~ISTR_ESOF) /* clear Expected Start Of Frame bit */ |
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|
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#define CNTR_CTRM (0x8000) /* Correct TRansfer Mask */ |
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#define CNTR_OVRM (0x4000) /* OVeR/underrun Mask */ |
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#define CNTR_ERRM (0x2000) /* ERRor Mask */ |
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#define CNTR_WKUPM (0x1000) /* WaKe UP Mask */ |
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#define CNTR_SUSPM (0x0800) /* SUSPend Mask */ |
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#define CNTR_RESETM (0x0400) /* RESET Mask */ |
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#define CNTR_SOFM (0x0200) /* Start Of Frame Mask */ |
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#define CNTR_ESOFM (0x0100) /* Expected Start Of Frame Mask */ |
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|
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#define CNTR_RESUME (0x0010) /* RESUME request */ |
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#define CNTR_FSUSP (0x0008) /* Force SUSPend */ |
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#define CNTR_LPMODE (0x0004) /* Low-power MODE */ |
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#define CNTR_PDWN (0x0002) /* Power DoWN */ |
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#define CNTR_FRES (0x0001) /* Force USB RESet */ |
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|
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#define DADDR_EF (0x80) |
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#define DADDR_ADD (0x7F) |
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|
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#define EP_CTR_RX (0x8000) /* EndPoint Correct TRansfer RX */ |
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#define EP_DTOG_RX (0x4000) /* EndPoint Data TOGGLE RX */ |
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#define EPRX_STAT (0x3000) /* EndPoint RX STATus bit field */ |
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#define EP_SETUP (0x0800) /* EndPoint SETUP */ |
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#define EP_T_FIELD (0x0600) /* EndPoint TYPE */ |
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#define EP_KIND (0x0100) /* EndPoint KIND */ |
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#define EP_CTR_TX (0x0080) /* EndPoint Correct TRansfer TX */ |
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#define EP_DTOG_TX (0x0040) /* EndPoint Data TOGGLE TX */ |
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#define EPTX_STAT (0x0030) /* EndPoint TX STATus bit field */ |
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#define EPADDR_FIELD (0x000F) /* EndPoint ADDRess FIELD */ |
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|
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#define EPREG_MASK (EP_CTR_RX|EP_SETUP|EP_T_FIELD|EP_KIND|EP_CTR_TX|EPADDR_FIELD) |
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|
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/* STAT_TX[1:0] STATus for TX transfer */ |
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#define EP_TX_DIS (0x0000) /* EndPoint TX DISabled */ |
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#define EP_TX_STALL (0x0010) /* EndPoint TX STALLed */ |
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#define EP_TX_NAK (0x0020) /* EndPoint TX NAKed */ |
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#define EP_TX_VALID (0x0030) /* EndPoint TX VALID */ |
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#define EPTX_DTOG1 (0x0010) /* EndPoint TX Data TOGgle bit1 */ |
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#define EPTX_DTOG2 (0x0020) /* EndPoint TX Data TOGgle bit2 */ |
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|
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/* STAT_RX[1:0] STATus for RX transfer */ |
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#define EP_RX_DIS (0x0000) /* EndPoint RX DISabled */ |
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#define EP_RX_STALL (0x1000) /* EndPoint RX STALLed */ |
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#define EP_RX_NAK (0x2000) /* EndPoint RX NAKed */ |
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#define EP_RX_VALID (0x3000) /* EndPoint RX VALID */ |
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#define EPRX_DTOG1 (0x1000) /* EndPoint RX Data TOGgle bit1 */ |
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#define EPRX_DTOG2 (0x2000) /* EndPoint RX Data TOGgle bit1 */ |
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static int usb_handle_transfer (struct usb_dev *dev, uint16_t istr_value); |
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static void st103_set_btable (void) |
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{ |
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*BTABLE = 0; |
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} |
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static uint16_t st103_get_istr (void) |
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{ |
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return *ISTR; |
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} |
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static void st103_set_istr (uint16_t istr) |
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{ |
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*ISTR = istr; |
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} |
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static void st103_set_cntr (uint16_t cntr) |
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{ |
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*CNTR = cntr; |
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} |
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static void st103_set_daddr (uint16_t daddr) |
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{ |
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*DADDR = daddr | DADDR_EF; |
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} |
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static void st103_set_epreg (uint8_t ep_num, uint16_t value) |
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{ |
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uint16_t *reg_p = (uint16_t *)(REG_BASE + ep_num*4); |
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*reg_p = value; |
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} |
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static uint16_t st103_get_epreg (uint8_t ep_num) |
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{ |
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uint16_t *reg_p = (uint16_t *)(REG_BASE + ep_num*4); |
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return *reg_p; |
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} |
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static void st103_set_tx_addr (uint8_t ep_num, uint16_t addr) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+0)*2); |
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*reg_p = addr; |
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} |
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static uint16_t st103_get_tx_addr (uint8_t ep_num) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+0)*2); |
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return *reg_p; |
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} |
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static void st103_set_tx_count (uint8_t ep_num, uint16_t size) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+2)*2); |
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*reg_p = size; |
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} |
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static uint16_t st103_get_tx_count (uint8_t ep_num) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+2)*2); |
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return *reg_p & 0x03ff; |
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} |
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static void st103_set_rx_addr (uint8_t ep_num, uint16_t addr) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+4)*2); |
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*reg_p = addr; |
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} |
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static uint16_t st103_get_rx_addr (uint8_t ep_num) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+4)*2); |
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return *reg_p; |
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} |
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static void st103_set_rx_buf_size (uint8_t ep_num, uint16_t size) |
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{ /* Assume size is even */ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+6)*2); |
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uint16_t value; |
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if (size <= 62) |
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value = (size & 0x3e) << 9; |
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else |
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value = 0x8000 | (((size >> 5) - 1) << 10); |
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*reg_p = value; |
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} |
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static uint16_t st103_get_rx_count (uint8_t ep_num) |
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{ |
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uint16_t *reg_p = (uint16_t *)(PMA_ADDR + (ep_num*8+6)*2); |
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return *reg_p & 0x03ff; |
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} |
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static void st103_ep_clear_ctr_rx (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num) & ~EP_CTR_RX & EPREG_MASK; |
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st103_set_epreg (ep_num, value); |
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} |
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static void st103_ep_clear_ctr_tx (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num) & ~EP_CTR_TX & EPREG_MASK; |
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st103_set_epreg (ep_num, value); |
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} |
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static void st103_ep_set_rxtx_status (uint8_t ep_num, uint16_t st_rx, |
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uint16_t st_tx) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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value &= (EPREG_MASK|EPRX_STAT|EPTX_STAT); |
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value ^= (EPRX_DTOG1 & st_rx); |
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value ^= (EPRX_DTOG2 & st_rx); |
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value ^= (EPTX_DTOG1 & st_tx); |
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value ^= (EPTX_DTOG2 & st_tx); |
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value |= EP_CTR_RX | EP_CTR_TX; |
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st103_set_epreg (ep_num, value); |
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} |
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static void st103_ep_set_rx_status (uint8_t ep_num, uint16_t st_rx) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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value &= (EPREG_MASK|EPRX_STAT); |
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value ^= (EPRX_DTOG1 & st_rx); |
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value ^= (EPRX_DTOG2 & st_rx); |
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value |= EP_CTR_RX | EP_CTR_TX; |
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st103_set_epreg (ep_num, value); |
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} |
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static uint16_t st103_ep_get_rx_status (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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return value & EPRX_STAT; |
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} |
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static void st103_ep_set_tx_status (uint8_t ep_num, uint16_t st_tx) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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value &= (EPREG_MASK|EPTX_STAT); |
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value ^= (EPTX_DTOG1 & st_tx); |
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value ^= (EPTX_DTOG2 & st_tx); |
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value |= EP_CTR_RX | EP_CTR_TX; |
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st103_set_epreg (ep_num, value); |
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} |
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static uint16_t st103_ep_get_tx_status (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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return value & EPTX_STAT; |
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} |
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static void st103_ep_clear_dtog_rx (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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if ((value & EP_DTOG_RX)) |
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{ |
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value &= EPREG_MASK; |
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value |= EP_CTR_RX | EP_CTR_TX | EP_DTOG_RX; |
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st103_set_epreg (ep_num, value); |
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} |
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} |
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static void st103_ep_clear_dtog_tx (uint8_t ep_num) |
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{ |
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uint16_t value = st103_get_epreg (ep_num); |
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if ((value & EP_DTOG_TX)) |
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{ |
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value &= EPREG_MASK; |
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value |= EP_CTR_RX | EP_CTR_TX | EP_DTOG_TX; |
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st103_set_epreg (ep_num, value); |
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} |
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} |
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void |
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usb_lld_ctrl_error (struct usb_dev *dev) |
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{ |
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dev->state = STALLED; |
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st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_STALL); |
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} |
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int |
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usb_lld_ctrl_ack (struct usb_dev *dev) |
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{ |
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dev->state = WAIT_STATUS_IN; |
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st103_set_tx_count (ENDP0, 0); |
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st103_ep_set_rxtx_status (ENDP0, EP_RX_NAK, EP_TX_VALID); |
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return USB_EVENT_OK; |
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} |
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void usb_lld_init (struct usb_dev *dev, uint8_t feature) |
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{ |
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usb_lld_sys_init (); |
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dev->configuration = 0; |
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dev->feature = feature; |
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dev->state = WAIT_SETUP; |
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/* Reset USB */ |
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st103_set_cntr (CNTR_FRES); |
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st103_set_cntr (0); |
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/* Clear Interrupt Status Register, and enable interrupt for USB */ |
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st103_set_istr (0); |
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st103_set_btable (); |
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st103_set_cntr (CNTR_CTRM | CNTR_OVRM | CNTR_ERRM |
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| CNTR_WKUPM | CNTR_SUSPM | CNTR_RESETM); |
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#if 0 |
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/* |
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* Since stop mode makes PLL, HSI & HES oscillators stop, USB clock is |
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* not supplied in stop mode. Thus, USB wakeup can't occur. |
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* |
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* So, only sleep mode can be supported with USB, which doesn't |
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* require use of EXTI. |
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*/ |
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#include "mcu/stm32f103.h" |
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/* Setting of EXTI wakeup event to break stop mode. */ |
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EXTI->EMR |= (1 << 18); /* Event mask cleared */ |
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EXTI->RTSR |= (1 << 18); /* Rising trigger selection */ |
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#endif |
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} |
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void usb_lld_prepare_shutdown (void) |
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{ |
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st103_set_istr (0); |
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st103_set_cntr (0); |
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} |
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void usb_lld_shutdown (void) |
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{ |
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st103_set_cntr (CNTR_PDWN); |
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usb_lld_sys_shutdown (); |
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} |
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#define USB_MAKE_EV(event) (event<<24) |
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#define USB_MAKE_TXRX(ep_num,txrx,len) ((txrx? (1<<23):0)|(ep_num<<16)|len) |
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int |
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usb_lld_event_handler (struct usb_dev *dev) |
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{ |
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uint16_t istr_value = st103_get_istr (); |
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if ((istr_value & ISTR_RESET)) |
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{ |
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st103_set_istr (CLR_RESET); |
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return USB_MAKE_EV (USB_EVENT_DEVICE_RESET); |
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} |
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else if ((istr_value & ISTR_WKUP)) |
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{ |
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*CNTR &= ~CNTR_FSUSP; |
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st103_set_istr (CLR_WKUP); |
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return USB_MAKE_EV (USB_EVENT_DEVICE_WAKEUP); |
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} |
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else if ((istr_value & ISTR_SUSP)) |
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{ |
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*CNTR |= CNTR_FSUSP; |
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st103_set_istr (CLR_SUSP); |
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*CNTR |= CNTR_LPMODE; |
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return USB_MAKE_EV (USB_EVENT_DEVICE_SUSPEND); |
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} |
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else |
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{ |
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if ((istr_value & ISTR_OVR)) |
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st103_set_istr (CLR_OVR); |
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|
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if ((istr_value & ISTR_ERR)) |
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st103_set_istr (CLR_ERR); |
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if ((istr_value & ISTR_CTR)) |
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return usb_handle_transfer (dev, istr_value); |
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} |
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return USB_EVENT_OK; |
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} |
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static void handle_datastage_out (struct usb_dev *dev) |
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{ |
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if (dev->ctrl_data.addr && dev->ctrl_data.len) |
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{ |
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uint32_t len = st103_get_rx_count (ENDP0); |
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if (len > dev->ctrl_data.len) |
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len = dev->ctrl_data.len; |
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usb_lld_from_pmabuf (dev->ctrl_data.addr, st103_get_rx_addr (ENDP0), len); |
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dev->ctrl_data.len -= len; |
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dev->ctrl_data.addr += len; |
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} |
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|
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if (dev->ctrl_data.len == 0) |
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{ |
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dev->state = WAIT_STATUS_IN; |
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st103_set_tx_count (ENDP0, 0); |
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st103_ep_set_tx_status (ENDP0, EP_TX_VALID); |
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} |
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else |
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{ |
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dev->state = OUT_DATA; |
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st103_ep_set_rx_status (ENDP0, EP_RX_VALID); |
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} |
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} |
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|
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static void handle_datastage_in (struct usb_dev *dev) |
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{ |
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uint32_t len = USB_MAX_PACKET_SIZE;; |
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struct ctrl_data *data_p = &dev->ctrl_data; |
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|
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if ((data_p->len == 0) && (dev->state == LAST_IN_DATA)) |
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{ |
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if (data_p->require_zlp) |
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{ |
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data_p->require_zlp = 0; |
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|
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/* No more data to send. Send empty packet */ |
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st103_set_tx_count (ENDP0, 0); |
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st103_ep_set_tx_status (ENDP0, EP_TX_VALID); |
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} |
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else |
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{ |
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/* No more data to send, proceed to receive OUT acknowledge. */ |
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dev->state = WAIT_STATUS_OUT; |
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st103_ep_set_rx_status (ENDP0, EP_RX_VALID); |
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} |
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|
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return; |
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} |
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|
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dev->state = (data_p->len <= len) ? LAST_IN_DATA : IN_DATA; |
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|
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if (len > data_p->len) |
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len = data_p->len; |
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|
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usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len); |
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data_p->len -= len; |
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data_p->addr += len; |
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st103_set_tx_count (ENDP0, len); |
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st103_ep_set_tx_status (ENDP0, EP_TX_VALID); |
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} |
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|
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typedef int (*HANDLER) (struct usb_dev *dev); |
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|
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static int std_none (struct usb_dev *dev) |
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{ |
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(void)dev; |
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return -1; |
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} |
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|
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static int std_get_status (struct usb_dev *dev) |
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{ |
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struct device_req *arg = &dev->dev_req; |
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uint8_t rcp = (arg->type & RECIPIENT); |
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uint16_t status_info = 0; |
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|
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if (arg->value != 0 || arg->len != 2 || (arg->index >> 8) != 0 |
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|| USB_SETUP_SET (arg->type)) |
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return -1; |
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|
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if (rcp == DEVICE_RECIPIENT) |
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{ |
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if (arg->index == 0) |
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{ |
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/* Get Device Status */ |
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uint8_t feature = dev->feature; |
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|
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/* Remote Wakeup enabled */ |
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if ((feature & (1 << 5))) |
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status_info |= 2; |
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else |
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status_info &= ~2; |
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|
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/* Bus-powered */ |
||
if ((feature & (1 << 6))) |
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status_info |= 1; |
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else /* Self-powered */ |
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status_info &= ~1; |
||
|
||
return usb_lld_ctrl_send (dev, &status_info, 2); |
||
} |
||
} |
||
else if (rcp == INTERFACE_RECIPIENT) |
||
{ |
||
if (dev->configuration == 0) |
||
return -1; |
||
|
||
return USB_EVENT_GET_STATUS_INTERFACE; |
||
} |
||
else if (rcp == ENDPOINT_RECIPIENT) |
||
{ |
||
uint8_t endpoint = (arg->index & 0x0f); |
||
uint16_t status; |
||
|
||
if ((arg->index & 0x70) || endpoint == ENDP0) |
||
return -1; |
||
|
||
if ((arg->index & 0x80)) |
||
{ |
||
status = st103_ep_get_tx_status (endpoint); |
||
if (status == 0) /* Disabled */ |
||
return -1; |
||
else if (status == EP_TX_STALL) |
||
status_info |= 1; /* IN Endpoint stalled */ |
||
} |
||
else |
||
{ |
||
status = st103_ep_get_rx_status (endpoint); |
||
if (status == 0) /* Disabled */ |
||
return -1; |
||
else if (status == EP_RX_STALL) |
||
status_info |= 1; /* OUT Endpoint stalled */ |
||
} |
||
|
||
return usb_lld_ctrl_send (dev, &status_info, 2); |
||
} |
||
|
||
return -1; |
||
} |
||
|
||
static int std_clear_feature (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_GET (arg->type)) |
||
return -1; |
||
|
||
if (rcp == DEVICE_RECIPIENT) |
||
{ |
||
if (arg->len != 0 || arg->index != 0) |
||
return -1; |
||
|
||
if (arg->value == FEATURE_DEVICE_REMOTE_WAKEUP) |
||
{ |
||
dev->feature &= ~(1 << 5); |
||
return USB_EVENT_CLEAR_FEATURE_DEVICE; |
||
} |
||
} |
||
else if (rcp == ENDPOINT_RECIPIENT) |
||
{ |
||
uint8_t endpoint = (arg->index & 0x0f); |
||
uint16_t status; |
||
|
||
if (dev->configuration == 0) |
||
return -1; |
||
|
||
if (arg->len != 0 || (arg->index >> 8) != 0 |
||
|| arg->value != FEATURE_ENDPOINT_HALT || endpoint == ENDP0) |
||
return -1; |
||
|
||
if ((arg->index & 0x80)) |
||
status = st103_ep_get_tx_status (endpoint); |
||
else |
||
status = st103_ep_get_rx_status (endpoint); |
||
|
||
if (status == 0) /* It's disabled endpoint. */ |
||
return -1; |
||
|
||
if (arg->index & 0x80) /* IN endpoint */ |
||
st103_ep_clear_dtog_tx (endpoint); |
||
else /* OUT endpoint */ |
||
st103_ep_clear_dtog_rx (endpoint); |
||
|
||
return USB_EVENT_CLEAR_FEATURE_ENDPOINT; |
||
} |
||
|
||
return -1; |
||
} |
||
|
||
static int std_set_feature (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_GET (arg->type)) |
||
return -1; |
||
|
||
if (rcp == DEVICE_RECIPIENT) |
||
{ |
||
if (arg->len != 0 || arg->index != 0) |
||
return -1; |
||
|
||
if (arg->value == FEATURE_DEVICE_REMOTE_WAKEUP) |
||
{ |
||
dev->feature |= 1 << 5; |
||
return USB_EVENT_SET_FEATURE_DEVICE; |
||
} |
||
} |
||
else if (rcp == ENDPOINT_RECIPIENT) |
||
{ |
||
uint8_t endpoint = (arg->index & 0x0f); |
||
uint32_t status; |
||
|
||
if (dev->configuration == 0) |
||
return -1; |
||
|
||
if (arg->len != 0 || (arg->index >> 8) != 0 |
||
|| arg->value != FEATURE_ENDPOINT_HALT || endpoint == ENDP0) |
||
return -1; |
||
|
||
if ((arg->index & 0x80)) |
||
status = st103_ep_get_tx_status (endpoint); |
||
else |
||
status = st103_ep_get_rx_status (endpoint); |
||
|
||
if (status == 0) /* It's disabled endpoint. */ |
||
return -1; |
||
|
||
if (arg->index & 0x80) /* IN endpoint */ |
||
st103_ep_set_tx_status (endpoint, EP_TX_STALL); |
||
else /* OUT endpoint */ |
||
st103_ep_set_rx_status (endpoint, EP_RX_STALL); |
||
|
||
return USB_EVENT_SET_FEATURE_ENDPOINT; |
||
} |
||
|
||
return -1; |
||
} |
||
|
||
static int std_set_address (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_GET (arg->type)) |
||
return -1; |
||
|
||
if (rcp == DEVICE_RECIPIENT && arg->len == 0 && arg->value <= 127 |
||
&& arg->index == 0 && dev->configuration == 0) |
||
return usb_lld_ctrl_ack (dev); |
||
|
||
return -1; |
||
} |
||
|
||
static int std_get_descriptor (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
if (USB_SETUP_SET (arg->type)) |
||
return -1; |
||
|
||
return USB_EVENT_GET_DESCRIPTOR; |
||
} |
||
|
||
static int std_get_configuration (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_SET (arg->type)) |
||
return -1; |
||
|
||
if (arg->value != 0 || arg->index != 0 || arg->len != 1) |
||
return -1; |
||
|
||
if (rcp == DEVICE_RECIPIENT) |
||
return usb_lld_ctrl_send (dev, &dev->configuration, 1); |
||
|
||
return -1; |
||
} |
||
|
||
static int std_set_configuration (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_GET (arg->type)) |
||
return -1; |
||
|
||
if (arg->index != 0 || arg->len != 0) |
||
return -1; |
||
|
||
if (rcp == DEVICE_RECIPIENT) |
||
return USB_EVENT_SET_CONFIGURATION; |
||
|
||
return -1; |
||
} |
||
|
||
static int std_get_interface (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_SET (arg->type)) |
||
return -1; |
||
|
||
if (arg->value != 0 || (arg->index >> 8) != 0 || arg->len != 1) |
||
return -1; |
||
|
||
if (dev->configuration == 0) |
||
return -1; |
||
|
||
if (rcp == INTERFACE_RECIPIENT) |
||
return USB_EVENT_GET_INTERFACE; |
||
|
||
return -1; |
||
} |
||
|
||
static int std_set_interface (struct usb_dev *dev) |
||
{ |
||
struct device_req *arg = &dev->dev_req; |
||
uint8_t rcp = arg->type & RECIPIENT; |
||
|
||
if (USB_SETUP_GET (arg->type) || rcp != INTERFACE_RECIPIENT |
||
|| arg->len != 0 || (arg->index >> 8) != 0 |
||
|| (arg->value >> 8) != 0 || dev->configuration == 0) |
||
return -1; |
||
|
||
return USB_EVENT_SET_INTERFACE; |
||
} |
||
|
||
|
||
static int handle_setup0 (struct usb_dev *dev) |
||
{ |
||
const uint16_t *pw; |
||
uint16_t w; |
||
uint8_t req_no; |
||
HANDLER handler; |
||
|
||
pw = (uint16_t *)(PMA_ADDR + (uint8_t *)(st103_get_rx_addr (ENDP0) * 2)); |
||
w = *pw++; |
||
|
||
dev->dev_req.type = (w & 0xff); |
||
dev->dev_req.request = req_no = (w >> 8); |
||
pw++; |
||
dev->dev_req.value = *pw++; |
||
pw++; |
||
dev->dev_req.index = *pw++; |
||
pw++; |
||
dev->dev_req.len = *pw; |
||
|
||
dev->ctrl_data.addr = NULL; |
||
dev->ctrl_data.len = 0; |
||
dev->ctrl_data.require_zlp = 0; |
||
|
||
if ((dev->dev_req.type & REQUEST_TYPE) == STANDARD_REQUEST) |
||
{ |
||
int r; |
||
|
||
switch (req_no) |
||
{ |
||
case 0: handler = std_get_status; break; |
||
case 1: handler = std_clear_feature; break; |
||
case 3: handler = std_set_feature; break; |
||
case 5: handler = std_set_address; break; |
||
case 6: handler = std_get_descriptor; break; |
||
case 8: handler = std_get_configuration; break; |
||
case 9: handler = std_set_configuration; break; |
||
case 10: handler = std_get_interface; break; |
||
case 11: handler = std_set_interface; break; |
||
default: handler = std_none; break; |
||
} |
||
|
||
if ((r = (*handler) (dev)) < 0) |
||
{ |
||
usb_lld_ctrl_error (dev); |
||
return USB_EVENT_OK; |
||
} |
||
else |
||
return r; |
||
} |
||
else |
||
return USB_EVENT_CTRL_REQUEST; |
||
} |
||
|
||
static int handle_in0 (struct usb_dev *dev) |
||
{ |
||
int r = 0; |
||
|
||
if (dev->state == IN_DATA || dev->state == LAST_IN_DATA) |
||
handle_datastage_in (dev); |
||
else if (dev->state == WAIT_STATUS_IN) |
||
{ |
||
dev->state = WAIT_SETUP; |
||
|
||
if ((dev->dev_req.request == SET_ADDRESS) && |
||
((dev->dev_req.type & (REQUEST_TYPE | RECIPIENT)) |
||
== (STANDARD_REQUEST | DEVICE_RECIPIENT))) |
||
{ |
||
st103_set_daddr (dev->dev_req.value); |
||
r = USB_EVENT_DEVICE_ADDRESSED; |
||
} |
||
else |
||
r = USB_EVENT_CTRL_WRITE_FINISH; |
||
} |
||
else |
||
{ |
||
dev->state = STALLED; |
||
st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_STALL); |
||
} |
||
|
||
return r; |
||
} |
||
|
||
static void handle_out0 (struct usb_dev *dev) |
||
{ |
||
if (dev->state == OUT_DATA) |
||
/* Usual case. */ |
||
handle_datastage_out (dev); |
||
else if (dev->state == WAIT_STATUS_OUT) |
||
/* |
||
* Control READ transfer finished by ZLP. |
||
* Leave ENDP0 status RX_NAK, TX_NAK. |
||
*/ |
||
dev->state = WAIT_SETUP; |
||
else |
||
{ |
||
/* |
||
* dev->state == IN_DATA || dev->state == LAST_IN_DATA |
||
* (Host aborts the transfer before finish) |
||
* Or else, unexpected state. |
||
* STALL the endpoint, until we receive the next SETUP token. |
||
*/ |
||
dev->state = STALLED; |
||
st103_ep_set_rxtx_status (ENDP0, EP_RX_STALL, EP_TX_STALL); |
||
} |
||
} |
||
|
||
|
||
static int |
||
usb_handle_transfer (struct usb_dev *dev, uint16_t istr_value) |
||
{ |
||
uint16_t ep_value = 0; |
||
uint8_t ep_num = (istr_value & ISTR_EP_ID); |
||
|
||
ep_value = st103_get_epreg (ep_num); |
||
|
||
if (ep_num == 0) |
||
{ |
||
if ((ep_value & EP_CTR_TX)) |
||
{ |
||
st103_ep_clear_ctr_tx (ep_num); |
||
return USB_MAKE_EV (handle_in0 (dev)); |
||
} |
||
|
||
if ((ep_value & EP_CTR_RX)) |
||
{ |
||
st103_ep_clear_ctr_rx (ep_num); |
||
|
||
if ((ep_value & EP_SETUP)) |
||
return USB_MAKE_EV (handle_setup0 (dev)); |
||
else |
||
{ |
||
handle_out0 (dev); |
||
return USB_EVENT_OK; |
||
} |
||
} |
||
} |
||
else |
||
{ |
||
uint16_t len; |
||
|
||
if ((ep_value & EP_CTR_RX)) |
||
{ |
||
len = st103_get_rx_count (ep_num); |
||
st103_ep_clear_ctr_rx (ep_num); |
||
return USB_MAKE_TXRX (ep_num, 0, len); |
||
} |
||
|
||
if ((ep_value & EP_CTR_TX)) |
||
{ |
||
len = st103_get_tx_count (ep_num); |
||
st103_ep_clear_ctr_tx (ep_num); |
||
return USB_MAKE_TXRX (ep_num, 1, len); |
||
} |
||
} |
||
|
||
return USB_EVENT_OK; |
||
} |
||
|
||
void usb_lld_reset (struct usb_dev *dev, uint8_t feature) |
||
{ |
||
usb_lld_set_configuration (dev, 0); |
||
dev->feature = feature; |
||
st103_set_daddr (0); |
||
} |
||
|
||
void usb_lld_txcpy (const void *src, |
||
int ep_num, int offset, size_t len) |
||
{ |
||
usb_lld_to_pmabuf (src, st103_get_tx_addr (ep_num) + offset, len); |
||
} |
||
|
||
void usb_lld_write (uint8_t ep_num, const void *buf, size_t len) |
||
{ |
||
usb_lld_to_pmabuf (buf, st103_get_tx_addr (ep_num), len); |
||
st103_set_tx_count (ep_num, len); |
||
st103_ep_set_tx_status (ep_num, EP_TX_VALID); |
||
} |
||
|
||
void usb_lld_rxcpy (uint8_t *dst, |
||
int ep_num, int offset, size_t len) |
||
{ |
||
usb_lld_from_pmabuf (dst, st103_get_rx_addr (ep_num) + offset, len); |
||
} |
||
|
||
void usb_lld_tx_enable (int ep_num, size_t len) |
||
{ |
||
st103_set_tx_count (ep_num, len); |
||
st103_ep_set_tx_status (ep_num, EP_TX_VALID); |
||
} |
||
|
||
void usb_lld_stall_tx (int ep_num) |
||
{ |
||
st103_ep_set_tx_status (ep_num, EP_TX_STALL); |
||
} |
||
|
||
void usb_lld_stall_rx (int ep_num) |
||
{ |
||
st103_ep_set_rx_status (ep_num, EP_RX_STALL); |
||
} |
||
|
||
void usb_lld_rx_enable (int ep_num) |
||
{ |
||
st103_ep_set_rx_status (ep_num, EP_RX_VALID); |
||
} |
||
|
||
void usb_lld_setup_endpoint (int ep_num, int ep_type, int ep_kind, |
||
int ep_rx_addr, int ep_tx_addr, |
||
int ep_rx_buf_size) |
||
{ |
||
uint16_t epreg_value = st103_get_epreg (ep_num); |
||
uint16_t ep_rxtx_status = 0; /* Both disabled */ |
||
|
||
/* Clear: Write 1 if 1: EP_DTOG_RX, EP_DTOG_TX */ |
||
/* Set: Write: EP_T_FIELD, EP_KIND, EPADDR_FIELD */ |
||
/* Set: Toggle: EPRX_STAT, EPTX_STAT */ |
||
epreg_value &= (EPRX_STAT | EP_SETUP | EPTX_STAT | EP_DTOG_RX | EP_DTOG_TX); |
||
#if USB_KEEP_CORRECT_TRANSFER_FLAGS |
||
/* Keep: Write 1: EP_CTR_RX, EP_CTR_TX */ |
||
epreg_value |= (EP_CTR_RX|EP_CTR_TX); |
||
#else |
||
/* Clear: Write 0: EP_CTR_RX, EP_CTR_TX */ |
||
#endif |
||
epreg_value |= ep_type; |
||
epreg_value |= ep_kind; |
||
epreg_value |= ep_num; |
||
|
||
if (ep_rx_addr) |
||
{ |
||
ep_rxtx_status |= EP_RX_NAK; |
||
st103_set_rx_addr (ep_num, ep_rx_addr); |
||
st103_set_rx_buf_size (ep_num, ep_rx_buf_size); |
||
} |
||
|
||
if (ep_tx_addr) |
||
{ |
||
ep_rxtx_status |= EP_TX_NAK; |
||
st103_set_tx_addr (ep_num, ep_tx_addr); |
||
} |
||
|
||
epreg_value ^= (EPRX_DTOG1 & ep_rxtx_status); |
||
epreg_value ^= (EPRX_DTOG2 & ep_rxtx_status); |
||
epreg_value ^= (EPTX_DTOG1 & ep_rxtx_status); |
||
epreg_value ^= (EPTX_DTOG2 & ep_rxtx_status); |
||
|
||
st103_set_epreg (ep_num, epreg_value); |
||
} |
||
|
||
void usb_lld_set_configuration (struct usb_dev *dev, uint8_t config) |
||
{ |
||
dev->configuration = config; |
||
} |
||
|
||
uint8_t usb_lld_current_configuration (struct usb_dev *dev) |
||
{ |
||
return dev->configuration; |
||
} |
||
|
||
int usb_lld_ctrl_recv (struct usb_dev *dev, void *p, size_t len) |
||
{ |
||
struct ctrl_data *data_p = &dev->ctrl_data; |
||
data_p->addr = p; |
||
data_p->len = len; |
||
dev->state = OUT_DATA; |
||
st103_ep_set_rx_status (ENDP0, EP_RX_VALID); |
||
return USB_EVENT_OK; |
||
} |
||
|
||
void usb_lld_to_pmabuf (const void *src, uint16_t addr, size_t n) |
||
{ |
||
const uint8_t *s = (const uint8_t *)src; |
||
uint16_t *p; |
||
uint16_t w; |
||
|
||
if (n == 0) |
||
return; |
||
|
||
if ((addr & 1)) |
||
{ |
||
p = (uint16_t *)(PMA_ADDR + (addr - 1) * 2); |
||
w = *p; |
||
w = (w & 0xff) | (*s++) << 8; |
||
*p = w; |
||
p += 2; |
||
n--; |
||
} |
||
else |
||
p = (uint16_t *)(PMA_ADDR + addr * 2); |
||
|
||
while (n >= 2) |
||
{ |
||
w = *s++; |
||
w |= (*s++) << 8; |
||
*p = w; |
||
p += 2; |
||
n -= 2; |
||
} |
||
|
||
if (n > 0) |
||
{ |
||
w = *s; |
||
*p = w; |
||
} |
||
} |
||
|
||
void usb_lld_from_pmabuf (void *dst, uint16_t addr, size_t n) |
||
{ |
||
uint8_t *d = (uint8_t *)dst; |
||
uint16_t *p; |
||
uint16_t w; |
||
|
||
if (n == 0) |
||
return; |
||
|
||
if ((addr & 1)) |
||
{ |
||
p = (uint16_t *)(PMA_ADDR + (addr - 1) * 2); |
||
w = *p; |
||
*d++ = (w >> 8); |
||
p += 2; |
||
n--; |
||
} |
||
else |
||
p = (uint16_t *)(PMA_ADDR + addr * 2); |
||
|
||
while (n >= 2) |
||
{ |
||
w = *p; |
||
*d++ = (w & 0xff); |
||
*d++ = (w >> 8); |
||
p += 2; |
||
n -= 2; |
||
} |
||
|
||
if (n > 0) |
||
{ |
||
w = *p; |
||
*d = (w & 0xff); |
||
} |
||
} |
||
|
||
|
||
/* |
||
* BUF: Pointer to data memory. Data memory should not be allocated |
||
* on stack when BUFLEN > USB_MAX_PACKET_SIZE. |
||
* |
||
* BUFLEN: size of the data. |
||
*/ |
||
int |
||
usb_lld_ctrl_send (struct usb_dev *dev, const void *buf, size_t buflen) |
||
{ |
||
struct ctrl_data *data_p = &dev->ctrl_data; |
||
uint32_t len_asked = dev->dev_req.len; |
||
uint32_t len; |
||
|
||
data_p->addr = (void *)buf; |
||
data_p->len = buflen; |
||
|
||
/* Restrict the data length to be the one host asks for */ |
||
if (data_p->len >= len_asked) |
||
data_p->len = len_asked; |
||
/* ZLP is only required when host doesn't expect the end of packets. */ |
||
else if (data_p->len != 0 && (data_p->len % USB_MAX_PACKET_SIZE) == 0) |
||
data_p->require_zlp = 1; |
||
|
||
if (data_p->len < USB_MAX_PACKET_SIZE) |
||
{ |
||
len = data_p->len; |
||
dev->state = LAST_IN_DATA; |
||
} |
||
else |
||
{ |
||
len = USB_MAX_PACKET_SIZE; |
||
dev->state = IN_DATA; |
||
} |
||
|
||
if (len) |
||
{ |
||
usb_lld_to_pmabuf (data_p->addr, st103_get_tx_addr (ENDP0), len); |
||
data_p->len -= len; |
||
data_p->addr += len; |
||
} |
||
|
||
st103_set_tx_count (ENDP0, len); |
||
st103_ep_set_rxtx_status (ENDP0, EP_RX_NAK, EP_TX_VALID); |
||
return USB_EVENT_OK; |
||
}
|
||
|