usb_dc_usbfs.c 16 KB

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  1. /*
  2. * Copyright (c) 2022, sakumisu
  3. *
  4. * SPDX-License-Identifier: Apache-2.0
  5. */
  6. #include "usbd_core.h"
  7. #include "usb_ch32_usbfs_reg.h"
  8. #ifdef CONFIG_USB_HS
  9. #error "usb fs do not support hs"
  10. #endif
  11. #ifndef USBD_IRQHandler
  12. #define USBD_IRQHandler OTG_FS_IRQHandler //use actual usb irq name instead
  13. #endif
  14. #ifndef USB_NUM_BIDIR_ENDPOINTS
  15. #define USB_NUM_BIDIR_ENDPOINTS 8
  16. #endif
  17. #define USB_SET_DMA(ep_idx, addr) (*(volatile uint32_t *)((uint32_t)(&USBFS_DEVICE->UEP0_DMA) + 4 * ep_idx) = addr)
  18. #define USB_SET_TX_LEN(ep_idx, len) (*(volatile uint16_t *)((uint32_t)(&USBFS_DEVICE->UEP0_TX_LEN) + 4 * ep_idx) = len)
  19. #define USB_GET_TX_LEN(ep_idx) (*(volatile uint16_t *)((uint32_t)(&USBFS_DEVICE->UEP0_TX_LEN) + 4 * ep_idx))
  20. #define USB_SET_TX_CTRL(ep_idx, val) (*(volatile uint8_t *)((uint32_t)(&USBFS_DEVICE->UEP0_TX_CTRL) + 4 * ep_idx) = val)
  21. #define USB_GET_TX_CTRL(ep_idx) (*(volatile uint8_t *)((uint32_t)(&USBFS_DEVICE->UEP0_TX_CTRL) + 4 * ep_idx))
  22. #define USB_SET_RX_CTRL(ep_idx, val) (*(volatile uint8_t *)((uint32_t)(&USBFS_DEVICE->UEP0_RX_CTRL) + 4 * ep_idx) = val)
  23. #define USB_GET_RX_CTRL(ep_idx) (*(volatile uint8_t *)((uint32_t)(&USBFS_DEVICE->UEP0_RX_CTRL) + 4 * ep_idx))
  24. /* Endpoint state */
  25. struct ch32_usbfs_ep_state {
  26. uint16_t ep_mps; /* Endpoint max packet size */
  27. uint8_t ep_type; /* Endpoint type */
  28. uint8_t ep_stalled; /* Endpoint stall flag */
  29. uint8_t ep_enable; /* Endpoint enable */
  30. uint8_t *xfer_buf;
  31. uint32_t xfer_len;
  32. uint32_t actual_xfer_len;
  33. };
  34. /* Driver state */
  35. struct ch32_usbfs_udc {
  36. __attribute__((aligned(4))) struct usb_setup_packet setup;
  37. volatile uint8_t dev_addr;
  38. struct ch32_usbfs_ep_state in_ep[USB_NUM_BIDIR_ENDPOINTS]; /*!< IN endpoint parameters*/
  39. struct ch32_usbfs_ep_state out_ep[USB_NUM_BIDIR_ENDPOINTS]; /*!< OUT endpoint parameters */
  40. __attribute__((aligned(4))) uint8_t ep_databuf[USB_NUM_BIDIR_ENDPOINTS - 1][64 + 64]; //epx_out(64)+epx_in(64)
  41. } g_ch32_usbfs_udc;
  42. volatile bool ep0_rx_data_toggle;
  43. volatile bool ep0_tx_data_toggle;
  44. void USBD_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
  45. __WEAK void usb_dc_low_level_init(void)
  46. {
  47. }
  48. __WEAK void usb_dc_low_level_deinit(void)
  49. {
  50. }
  51. int usb_dc_init(uint8_t busid)
  52. {
  53. usb_dc_low_level_init();
  54. USBFS_DEVICE->BASE_CTRL = 0x00;
  55. USBFS_DEVICE->UEP4_1_MOD = USBFS_UEP4_RX_EN | USBFS_UEP4_TX_EN | USBFS_UEP1_RX_EN | USBFS_UEP1_TX_EN;
  56. USBFS_DEVICE->UEP2_3_MOD = USBFS_UEP2_RX_EN | USBFS_UEP2_TX_EN | USBFS_UEP3_RX_EN | USBFS_UEP3_TX_EN;
  57. USBFS_DEVICE->UEP5_6_MOD = USBFS_UEP5_RX_EN | USBFS_UEP5_TX_EN | USBFS_UEP6_RX_EN | USBFS_UEP6_TX_EN;
  58. USBFS_DEVICE->UEP7_MOD = USBFS_UEP7_RX_EN | USBFS_UEP7_TX_EN;
  59. USBFS_DEVICE->UEP1_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[0];
  60. USBFS_DEVICE->UEP2_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[1];
  61. USBFS_DEVICE->UEP3_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[2];
  62. USBFS_DEVICE->UEP4_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[3];
  63. USBFS_DEVICE->UEP5_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[4];
  64. USBFS_DEVICE->UEP6_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[5];
  65. USBFS_DEVICE->UEP7_DMA = (uint32_t)g_ch32_usbfs_udc.ep_databuf[6];
  66. USBFS_DEVICE->INT_FG = 0xFF;
  67. USBFS_DEVICE->INT_EN = USBFS_UIE_SUSPEND | USBFS_UIE_BUS_RST | USBFS_UIE_TRANSFER;
  68. USBFS_DEVICE->DEV_ADDR = 0x00;
  69. USBFS_DEVICE->BASE_CTRL = USBFS_UC_DEV_PU_EN | USBFS_UC_INT_BUSY | USBFS_UC_DMA_EN;
  70. USBFS_DEVICE->UDEV_CTRL = USBFS_UD_PD_DIS | USBFS_UD_PORT_EN;
  71. return 0;
  72. }
  73. int usb_dc_deinit(uint8_t busid)
  74. {
  75. return 0;
  76. }
  77. int usbd_set_address(uint8_t busid, const uint8_t addr)
  78. {
  79. if (addr == 0) {
  80. USBFS_DEVICE->DEV_ADDR = (USBFS_DEVICE->DEV_ADDR & USBFS_UDA_GP_BIT) | 0;
  81. }
  82. g_ch32_usbfs_udc.dev_addr = addr;
  83. return 0;
  84. }
  85. uint8_t usbd_get_port_speed(uint8_t busid)
  86. {
  87. return USB_SPEED_FULL;
  88. }
  89. int usbd_ep_open(uint8_t busid, const struct usb_endpoint_descriptor *ep)
  90. {
  91. uint8_t ep_idx = USB_EP_GET_IDX(ep->bEndpointAddress);
  92. if (USB_EP_DIR_IS_OUT(ep->bEndpointAddress)) {
  93. g_ch32_usbfs_udc.out_ep[ep_idx].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
  94. g_ch32_usbfs_udc.out_ep[ep_idx].ep_type = USB_GET_ENDPOINT_TYPE(ep->bmAttributes);
  95. g_ch32_usbfs_udc.out_ep[ep_idx].ep_enable = true;
  96. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_NAK | USBFS_UEP_AUTO_TOG);
  97. } else {
  98. g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps = USB_GET_MAXPACKETSIZE(ep->wMaxPacketSize);
  99. g_ch32_usbfs_udc.in_ep[ep_idx].ep_type = USB_GET_ENDPOINT_TYPE(ep->bmAttributes);
  100. g_ch32_usbfs_udc.in_ep[ep_idx].ep_enable = true;
  101. USB_SET_TX_CTRL(ep_idx, USBFS_UEP_T_RES_NAK | USBFS_UEP_AUTO_TOG);
  102. }
  103. return 0;
  104. }
  105. int usbd_ep_close(uint8_t busid, const uint8_t ep)
  106. {
  107. return 0;
  108. }
  109. int usbd_ep_set_stall(uint8_t busid, const uint8_t ep)
  110. {
  111. uint8_t ep_idx = USB_EP_GET_IDX(ep);
  112. if (USB_EP_DIR_IS_OUT(ep)) {
  113. if (ep_idx == 0) {
  114. USBFS_DEVICE->UEP0_RX_CTRL = USBFS_UEP_R_TOG | USBFS_UEP_R_RES_STALL;
  115. } else {
  116. USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBFS_UEP_R_RES_MASK) | USBFS_UEP_R_RES_STALL);
  117. }
  118. } else {
  119. if (ep_idx == 0) {
  120. USBFS_DEVICE->UEP0_TX_CTRL = USBFS_UEP_T_TOG | USBFS_UEP_T_RES_STALL;
  121. } else {
  122. USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~USBFS_UEP_T_RES_MASK) | USBFS_UEP_T_RES_STALL);
  123. }
  124. }
  125. if (ep_idx == 0) {
  126. USB_SET_DMA(ep_idx, (uint32_t)&g_ch32_usbfs_udc.setup);
  127. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  128. }
  129. return 0;
  130. }
  131. int usbd_ep_clear_stall(uint8_t busid, const uint8_t ep)
  132. {
  133. uint8_t ep_idx = USB_EP_GET_IDX(ep);
  134. if (ep_idx == 0) {
  135. return 0;
  136. }
  137. if (USB_EP_DIR_IS_OUT(ep)) {
  138. USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~(USBFS_UEP_R_TOG | USBFS_UEP_R_RES_MASK)) | USBFS_UEP_R_RES_ACK);
  139. } else {
  140. USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~(USBFS_UEP_T_TOG | USBFS_UEP_T_RES_MASK)) | USBFS_UEP_T_RES_NAK);
  141. }
  142. return 0;
  143. }
  144. int usbd_ep_is_stalled(uint8_t busid, const uint8_t ep, uint8_t *stalled)
  145. {
  146. return 0;
  147. }
  148. int usbd_ep_start_write(uint8_t busid, const uint8_t ep, const uint8_t *data, uint32_t data_len)
  149. {
  150. uint8_t ep_idx = USB_EP_GET_IDX(ep);
  151. if (!data && data_len) {
  152. return -1;
  153. }
  154. if (!g_ch32_usbfs_udc.in_ep[ep_idx].ep_enable) {
  155. return -2;
  156. }
  157. if ((uint32_t)data & 0x03) {
  158. printf("data do not align4\r\n");
  159. return -3;
  160. }
  161. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_buf = (uint8_t *)data;
  162. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len = data_len;
  163. g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len = 0;
  164. if (ep_idx == 0) {
  165. if (data_len == 0) {
  166. USB_SET_TX_LEN(ep_idx, 0);
  167. } else {
  168. data_len = MIN(data_len, g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps);
  169. USB_SET_TX_LEN(ep_idx, data_len);
  170. USB_SET_DMA(ep_idx, (uint32_t)data);
  171. }
  172. if (ep0_tx_data_toggle) {
  173. USB_SET_TX_CTRL(ep_idx, USBFS_UEP_T_TOG | USBFS_UEP_T_RES_ACK);
  174. } else {
  175. USB_SET_TX_CTRL(ep_idx, USBFS_UEP_T_RES_ACK);
  176. }
  177. } else {
  178. if (data_len == 0) {
  179. USB_SET_TX_LEN(ep_idx, 0);
  180. } else {
  181. data_len = MIN(data_len, g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps);
  182. USB_SET_TX_LEN(ep_idx, data_len);
  183. memcpy(&g_ch32_usbfs_udc.ep_databuf[ep_idx - 1][64], data, data_len);
  184. }
  185. USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~USBFS_UEP_T_RES_MASK) | USBFS_UEP_T_RES_ACK);
  186. }
  187. return 0;
  188. }
  189. int usbd_ep_start_read(uint8_t busid, const uint8_t ep, uint8_t *data, uint32_t data_len)
  190. {
  191. uint8_t ep_idx = USB_EP_GET_IDX(ep);
  192. if (!data && data_len) {
  193. return -1;
  194. }
  195. if (!g_ch32_usbfs_udc.out_ep[ep_idx].ep_enable) {
  196. return -2;
  197. }
  198. if ((uint32_t)data & 0x03) {
  199. printf("data do not align4\r\n");
  200. return -3;
  201. }
  202. g_ch32_usbfs_udc.out_ep[ep_idx].xfer_buf = (uint8_t *)data;
  203. g_ch32_usbfs_udc.out_ep[ep_idx].xfer_len = data_len;
  204. g_ch32_usbfs_udc.out_ep[ep_idx].actual_xfer_len = 0;
  205. if (ep_idx == 0) {
  206. if (data_len == 0) {
  207. } else {
  208. USB_SET_DMA(ep_idx, (uint32_t)data);
  209. }
  210. if (ep0_rx_data_toggle) {
  211. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_TOG | USBFS_UEP_R_RES_ACK);
  212. } else {
  213. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  214. }
  215. return 0;
  216. } else {
  217. USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBFS_UEP_R_RES_MASK) | USBFS_UEP_R_RES_ACK);
  218. }
  219. return 0;
  220. }
  221. void USBD_IRQHandler(void)
  222. {
  223. uint32_t ep_idx = 0, token, write_count, read_count;
  224. uint8_t intflag = 0;
  225. intflag = USBFS_DEVICE->INT_FG;
  226. if (intflag & USBFS_UIF_TRANSFER) {
  227. token = USBFS_DEVICE->INT_ST & USBFS_UIS_TOKEN_MASK;
  228. ep_idx = USBFS_DEVICE->INT_ST & USBFS_UIS_ENDP_MASK;
  229. switch (token) {
  230. case USBFS_UIS_TOKEN_SETUP:
  231. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_NAK);
  232. usbd_event_ep0_setup_complete_handler(0, (uint8_t *)&g_ch32_usbfs_udc.setup);
  233. break;
  234. case USBFS_UIS_TOKEN_IN:
  235. if (ep_idx == 0x00) {
  236. if (g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len >= g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps) {
  237. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len -= g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps;
  238. g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps;
  239. ep0_tx_data_toggle ^= 1;
  240. } else {
  241. g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len;
  242. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len = 0;
  243. ep0_tx_data_toggle = true;
  244. }
  245. usbd_event_ep_in_complete_handler(0, ep_idx | 0x80, g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len);
  246. if (g_ch32_usbfs_udc.dev_addr > 0) {
  247. USBFS_DEVICE->DEV_ADDR = (USBFS_DEVICE->DEV_ADDR & USBFS_UDA_GP_BIT) | g_ch32_usbfs_udc.dev_addr;
  248. g_ch32_usbfs_udc.dev_addr = 0;
  249. }
  250. if (g_ch32_usbfs_udc.setup.wLength && ((g_ch32_usbfs_udc.setup.bmRequestType & USB_REQUEST_DIR_MASK) == USB_REQUEST_DIR_OUT)) {
  251. /* In status, start reading setup */
  252. USB_SET_DMA(ep_idx, (uint32_t)&g_ch32_usbfs_udc.setup);
  253. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  254. ep0_tx_data_toggle = true;
  255. } else if (g_ch32_usbfs_udc.setup.wLength == 0) {
  256. /* In status, start reading setup */
  257. USB_SET_DMA(ep_idx, (uint32_t)&g_ch32_usbfs_udc.setup);
  258. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  259. ep0_tx_data_toggle = true;
  260. }
  261. } else {
  262. USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~USBFS_UEP_T_RES_MASK) | USBFS_UEP_T_RES_NAK);
  263. if (g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len > g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps) {
  264. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_buf += g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps;
  265. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len -= g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps;
  266. g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps;
  267. write_count = MIN(g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len, g_ch32_usbfs_udc.in_ep[ep_idx].ep_mps);
  268. USB_SET_TX_LEN(ep_idx, write_count);
  269. memcpy(&g_ch32_usbfs_udc.ep_databuf[ep_idx - 1][64], g_ch32_usbfs_udc.in_ep[ep_idx].xfer_buf, write_count);
  270. USB_SET_TX_CTRL(ep_idx, (USB_GET_TX_CTRL(ep_idx) & ~USBFS_UEP_T_RES_MASK) | USBFS_UEP_T_RES_ACK);
  271. } else {
  272. g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len += g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len;
  273. g_ch32_usbfs_udc.in_ep[ep_idx].xfer_len = 0;
  274. usbd_event_ep_in_complete_handler(0, ep_idx | 0x80, g_ch32_usbfs_udc.in_ep[ep_idx].actual_xfer_len);
  275. }
  276. }
  277. break;
  278. case USBFS_UIS_TOKEN_OUT:
  279. if (ep_idx == 0x00) {
  280. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_NAK);
  281. read_count = USBFS_DEVICE->RX_LEN;
  282. g_ch32_usbfs_udc.out_ep[ep_idx].actual_xfer_len += read_count;
  283. g_ch32_usbfs_udc.out_ep[ep_idx].xfer_len -= read_count;
  284. usbd_event_ep_out_complete_handler(0, 0x00, g_ch32_usbfs_udc.out_ep[ep_idx].actual_xfer_len);
  285. if (read_count == 0) {
  286. /* Out status, start reading setup */
  287. USB_SET_DMA(ep_idx, (uint32_t)&g_ch32_usbfs_udc.setup);
  288. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  289. ep0_rx_data_toggle = true;
  290. ep0_tx_data_toggle = true;
  291. } else {
  292. ep0_rx_data_toggle ^= 1;
  293. }
  294. } else {
  295. if (USBFS_DEVICE->INT_ST & USBFS_UIS_TOG_OK) {
  296. USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBFS_UEP_R_RES_MASK) | USBFS_UEP_R_RES_NAK);
  297. read_count = USBFS_DEVICE->RX_LEN;
  298. memcpy(g_ch32_usbfs_udc.out_ep[ep_idx].xfer_buf, &g_ch32_usbfs_udc.ep_databuf[ep_idx - 1][0], read_count);
  299. g_ch32_usbfs_udc.out_ep[ep_idx].xfer_buf += read_count;
  300. g_ch32_usbfs_udc.out_ep[ep_idx].actual_xfer_len += read_count;
  301. g_ch32_usbfs_udc.out_ep[ep_idx].xfer_len -= read_count;
  302. if ((read_count < g_ch32_usbfs_udc.out_ep[ep_idx].ep_mps) || (g_ch32_usbfs_udc.out_ep[ep_idx].xfer_len == 0)) {
  303. usbd_event_ep_out_complete_handler(0, ep_idx, g_ch32_usbfs_udc.out_ep[ep_idx].actual_xfer_len);
  304. } else {
  305. USB_SET_RX_CTRL(ep_idx, (USB_GET_RX_CTRL(ep_idx) & ~USBFS_UEP_R_RES_MASK) | USBFS_UEP_R_RES_ACK);
  306. }
  307. }
  308. }
  309. break;
  310. case USBFS_UIS_TOKEN_SOF:
  311. break;
  312. default:
  313. break;
  314. }
  315. USBFS_DEVICE->INT_FG = USBFS_UIF_TRANSFER;
  316. } else if (intflag & USBFS_UIF_BUS_RST) {
  317. USBFS_DEVICE->UEP0_TX_LEN = 0;
  318. USBFS_DEVICE->UEP0_TX_CTRL = USBFS_UEP_T_RES_NAK;
  319. USBFS_DEVICE->UEP0_RX_CTRL = USBFS_UEP_R_RES_NAK;
  320. for (uint8_t ep_idx = 1; ep_idx < USB_NUM_BIDIR_ENDPOINTS; ep_idx++) {
  321. USB_SET_TX_LEN(ep_idx, 0);
  322. USB_SET_TX_CTRL(ep_idx, USBFS_UEP_T_RES_NAK | USBFS_UEP_AUTO_TOG);
  323. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_NAK | USBFS_UEP_AUTO_TOG);
  324. }
  325. ep0_tx_data_toggle = true;
  326. ep0_rx_data_toggle = true;
  327. memset(&g_ch32_usbfs_udc, 0, sizeof(struct ch32_usbfs_udc));
  328. usbd_event_reset_handler(0);
  329. USB_SET_DMA(ep_idx, (uint32_t)&g_ch32_usbfs_udc.setup);
  330. USB_SET_RX_CTRL(ep_idx, USBFS_UEP_R_RES_ACK);
  331. USBFS_DEVICE->INT_FG |= USBFS_UIF_BUS_RST;
  332. } else if (intflag & USBFS_UIF_SUSPEND) {
  333. if (USBFS_DEVICE->MIS_ST & USBFS_UMS_SUSPEND) {
  334. } else {
  335. }
  336. USBFS_DEVICE->INT_FG = USBFS_UIF_SUSPEND;
  337. } else {
  338. USBFS_DEVICE->INT_FG = intflag;
  339. }
  340. }