1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * USB Gadget driver for LPC32xx 4 * 5 * Authors: 6 * Kevin Wells <kevin.wells@nxp.com> 7 * Mike James 8 * Roland Stigge <stigge@antcom.de> 9 * 10 * Copyright (C) 2006 Philips Semiconductors 11 * Copyright (C) 2009 NXP Semiconductors 12 * Copyright (C) 2012 Roland Stigge 13 * 14 * Note: This driver is based on original work done by Mike James for 15 * the LPC3180. 16 */ 17 18 #include <linux/clk.h> 19 #include <linux/delay.h> 20 #include <linux/dma-mapping.h> 21 #include <linux/dmapool.h> 22 #include <linux/i2c.h> 23 #include <linux/interrupt.h> 24 #include <linux/module.h> 25 #include <linux/of.h> 26 #include <linux/platform_device.h> 27 #include <linux/prefetch.h> 28 #include <linux/proc_fs.h> 29 #include <linux/slab.h> 30 #include <linux/usb/ch9.h> 31 #include <linux/usb/gadget.h> 32 #include <linux/usb/isp1301.h> 33 34 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 35 #include <linux/debugfs.h> 36 #include <linux/seq_file.h> 37 #endif 38 39 /* 40 * USB device configuration structure 41 */ 42 typedef void (*usc_chg_event)(int); 43 struct lpc32xx_usbd_cfg { 44 int vbus_drv_pol; /* 0=active low drive for VBUS via ISP1301 */ 45 usc_chg_event conn_chgb; /* Connection change event (optional) */ 46 usc_chg_event susp_chgb; /* Suspend/resume event (optional) */ 47 usc_chg_event rmwk_chgb; /* Enable/disable remote wakeup */ 48 }; 49 50 /* 51 * controller driver data structures 52 */ 53 54 /* 16 endpoints (not to be confused with 32 hardware endpoints) */ 55 #define NUM_ENDPOINTS 16 56 57 /* 58 * IRQ indices make reading the code a little easier 59 */ 60 #define IRQ_USB_LP 0 61 #define IRQ_USB_HP 1 62 #define IRQ_USB_DEVDMA 2 63 #define IRQ_USB_ATX 3 64 65 #define EP_OUT 0 /* RX (from host) */ 66 #define EP_IN 1 /* TX (to host) */ 67 68 /* Returns the interrupt mask for the selected hardware endpoint */ 69 #define EP_MASK_SEL(ep, dir) (1 << (((ep) * 2) + dir)) 70 71 #define EP_INT_TYPE 0 72 #define EP_ISO_TYPE 1 73 #define EP_BLK_TYPE 2 74 #define EP_CTL_TYPE 3 75 76 /* EP0 states */ 77 #define WAIT_FOR_SETUP 0 /* Wait for setup packet */ 78 #define DATA_IN 1 /* Expect dev->host transfer */ 79 #define DATA_OUT 2 /* Expect host->dev transfer */ 80 81 /* DD (DMA Descriptor) structure, requires word alignment, this is already 82 * defined in the LPC32XX USB device header file, but this version is slightly 83 * modified to tag some work data with each DMA descriptor. */ 84 struct lpc32xx_usbd_dd_gad { 85 u32 dd_next_phy; 86 u32 dd_setup; 87 u32 dd_buffer_addr; 88 u32 dd_status; 89 u32 dd_iso_ps_mem_addr; 90 u32 this_dma; 91 u32 iso_status[6]; /* 5 spare */ 92 u32 dd_next_v; 93 }; 94 95 /* 96 * Logical endpoint structure 97 */ 98 struct lpc32xx_ep { 99 struct usb_ep ep; 100 struct list_head queue; 101 struct lpc32xx_udc *udc; 102 103 u32 hwep_num_base; /* Physical hardware EP */ 104 u32 hwep_num; /* Maps to hardware endpoint */ 105 u32 maxpacket; 106 u32 lep; 107 108 bool is_in; 109 bool req_pending; 110 u32 eptype; 111 112 u32 totalints; 113 114 bool wedge; 115 }; 116 117 enum atx_type { 118 ISP1301, 119 STOTG04, 120 }; 121 122 /* 123 * Common UDC structure 124 */ 125 struct lpc32xx_udc { 126 struct usb_gadget gadget; 127 struct usb_gadget_driver *driver; 128 struct platform_device *pdev; 129 struct device *dev; 130 spinlock_t lock; 131 struct i2c_client *isp1301_i2c_client; 132 133 /* Board and device specific */ 134 struct lpc32xx_usbd_cfg *board; 135 void __iomem *udp_baseaddr; 136 int udp_irq[4]; 137 struct clk *usb_slv_clk; 138 139 /* DMA support */ 140 u32 *udca_v_base; 141 u32 udca_p_base; 142 struct dma_pool *dd_cache; 143 144 /* Common EP and control data */ 145 u32 enabled_devints; 146 u32 enabled_hwepints; 147 u32 dev_status; 148 u32 realized_eps; 149 150 /* VBUS detection, pullup, and power flags */ 151 u8 vbus; 152 u8 last_vbus; 153 int pullup; 154 int poweron; 155 enum atx_type atx; 156 157 /* Work queues related to I2C support */ 158 struct work_struct pullup_job; 159 struct work_struct power_job; 160 161 /* USB device peripheral - various */ 162 struct lpc32xx_ep ep[NUM_ENDPOINTS]; 163 bool enabled; 164 bool clocked; 165 bool suspended; 166 int ep0state; 167 atomic_t enabled_ep_cnt; 168 wait_queue_head_t ep_disable_wait_queue; 169 }; 170 171 /* 172 * Endpoint request 173 */ 174 struct lpc32xx_request { 175 struct usb_request req; 176 struct list_head queue; 177 struct lpc32xx_usbd_dd_gad *dd_desc_ptr; 178 bool mapped; 179 bool send_zlp; 180 }; 181 182 static inline struct lpc32xx_udc *to_udc(struct usb_gadget *g) 183 { 184 return container_of(g, struct lpc32xx_udc, gadget); 185 } 186 187 #define ep_dbg(epp, fmt, arg...) \ 188 dev_dbg(epp->udc->dev, "%s: " fmt, __func__, ## arg) 189 #define ep_err(epp, fmt, arg...) \ 190 dev_err(epp->udc->dev, "%s: " fmt, __func__, ## arg) 191 #define ep_info(epp, fmt, arg...) \ 192 dev_info(epp->udc->dev, "%s: " fmt, __func__, ## arg) 193 #define ep_warn(epp, fmt, arg...) \ 194 dev_warn(epp->udc->dev, "%s:" fmt, __func__, ## arg) 195 196 #define UDCA_BUFF_SIZE (128) 197 198 /********************************************************************** 199 * USB device controller register offsets 200 **********************************************************************/ 201 202 #define USBD_DEVINTST(x) ((x) + 0x200) 203 #define USBD_DEVINTEN(x) ((x) + 0x204) 204 #define USBD_DEVINTCLR(x) ((x) + 0x208) 205 #define USBD_DEVINTSET(x) ((x) + 0x20C) 206 #define USBD_CMDCODE(x) ((x) + 0x210) 207 #define USBD_CMDDATA(x) ((x) + 0x214) 208 #define USBD_RXDATA(x) ((x) + 0x218) 209 #define USBD_TXDATA(x) ((x) + 0x21C) 210 #define USBD_RXPLEN(x) ((x) + 0x220) 211 #define USBD_TXPLEN(x) ((x) + 0x224) 212 #define USBD_CTRL(x) ((x) + 0x228) 213 #define USBD_DEVINTPRI(x) ((x) + 0x22C) 214 #define USBD_EPINTST(x) ((x) + 0x230) 215 #define USBD_EPINTEN(x) ((x) + 0x234) 216 #define USBD_EPINTCLR(x) ((x) + 0x238) 217 #define USBD_EPINTSET(x) ((x) + 0x23C) 218 #define USBD_EPINTPRI(x) ((x) + 0x240) 219 #define USBD_REEP(x) ((x) + 0x244) 220 #define USBD_EPIND(x) ((x) + 0x248) 221 #define USBD_EPMAXPSIZE(x) ((x) + 0x24C) 222 /* DMA support registers only below */ 223 /* Set, clear, or get enabled state of the DMA request status. If 224 * enabled, an IN or OUT token will start a DMA transfer for the EP */ 225 #define USBD_DMARST(x) ((x) + 0x250) 226 #define USBD_DMARCLR(x) ((x) + 0x254) 227 #define USBD_DMARSET(x) ((x) + 0x258) 228 /* DMA UDCA head pointer */ 229 #define USBD_UDCAH(x) ((x) + 0x280) 230 /* EP DMA status, enable, and disable. This is used to specifically 231 * enabled or disable DMA for a specific EP */ 232 #define USBD_EPDMAST(x) ((x) + 0x284) 233 #define USBD_EPDMAEN(x) ((x) + 0x288) 234 #define USBD_EPDMADIS(x) ((x) + 0x28C) 235 /* DMA master interrupts enable and pending interrupts */ 236 #define USBD_DMAINTST(x) ((x) + 0x290) 237 #define USBD_DMAINTEN(x) ((x) + 0x294) 238 /* DMA end of transfer interrupt enable, disable, status */ 239 #define USBD_EOTINTST(x) ((x) + 0x2A0) 240 #define USBD_EOTINTCLR(x) ((x) + 0x2A4) 241 #define USBD_EOTINTSET(x) ((x) + 0x2A8) 242 /* New DD request interrupt enable, disable, status */ 243 #define USBD_NDDRTINTST(x) ((x) + 0x2AC) 244 #define USBD_NDDRTINTCLR(x) ((x) + 0x2B0) 245 #define USBD_NDDRTINTSET(x) ((x) + 0x2B4) 246 /* DMA error interrupt enable, disable, status */ 247 #define USBD_SYSERRTINTST(x) ((x) + 0x2B8) 248 #define USBD_SYSERRTINTCLR(x) ((x) + 0x2BC) 249 #define USBD_SYSERRTINTSET(x) ((x) + 0x2C0) 250 251 /********************************************************************** 252 * USBD_DEVINTST/USBD_DEVINTEN/USBD_DEVINTCLR/USBD_DEVINTSET/ 253 * USBD_DEVINTPRI register definitions 254 **********************************************************************/ 255 #define USBD_ERR_INT (1 << 9) 256 #define USBD_EP_RLZED (1 << 8) 257 #define USBD_TXENDPKT (1 << 7) 258 #define USBD_RXENDPKT (1 << 6) 259 #define USBD_CDFULL (1 << 5) 260 #define USBD_CCEMPTY (1 << 4) 261 #define USBD_DEV_STAT (1 << 3) 262 #define USBD_EP_SLOW (1 << 2) 263 #define USBD_EP_FAST (1 << 1) 264 #define USBD_FRAME (1 << 0) 265 266 /********************************************************************** 267 * USBD_EPINTST/USBD_EPINTEN/USBD_EPINTCLR/USBD_EPINTSET/ 268 * USBD_EPINTPRI register definitions 269 **********************************************************************/ 270 /* End point selection macro (RX) */ 271 #define USBD_RX_EP_SEL(e) (1 << ((e) << 1)) 272 273 /* End point selection macro (TX) */ 274 #define USBD_TX_EP_SEL(e) (1 << (((e) << 1) + 1)) 275 276 /********************************************************************** 277 * USBD_REEP/USBD_DMARST/USBD_DMARCLR/USBD_DMARSET/USBD_EPDMAST/ 278 * USBD_EPDMAEN/USBD_EPDMADIS/ 279 * USBD_NDDRTINTST/USBD_NDDRTINTCLR/USBD_NDDRTINTSET/ 280 * USBD_EOTINTST/USBD_EOTINTCLR/USBD_EOTINTSET/ 281 * USBD_SYSERRTINTST/USBD_SYSERRTINTCLR/USBD_SYSERRTINTSET 282 * register definitions 283 **********************************************************************/ 284 /* Endpoint selection macro */ 285 #define USBD_EP_SEL(e) (1 << (e)) 286 287 /********************************************************************** 288 * SBD_DMAINTST/USBD_DMAINTEN 289 **********************************************************************/ 290 #define USBD_SYS_ERR_INT (1 << 2) 291 #define USBD_NEW_DD_INT (1 << 1) 292 #define USBD_EOT_INT (1 << 0) 293 294 /********************************************************************** 295 * USBD_RXPLEN register definitions 296 **********************************************************************/ 297 #define USBD_PKT_RDY (1 << 11) 298 #define USBD_DV (1 << 10) 299 #define USBD_PK_LEN_MASK 0x3FF 300 301 /********************************************************************** 302 * USBD_CTRL register definitions 303 **********************************************************************/ 304 #define USBD_LOG_ENDPOINT(e) ((e) << 2) 305 #define USBD_WR_EN (1 << 1) 306 #define USBD_RD_EN (1 << 0) 307 308 /********************************************************************** 309 * USBD_CMDCODE register definitions 310 **********************************************************************/ 311 #define USBD_CMD_CODE(c) ((c) << 16) 312 #define USBD_CMD_PHASE(p) ((p) << 8) 313 314 /********************************************************************** 315 * USBD_DMARST/USBD_DMARCLR/USBD_DMARSET register definitions 316 **********************************************************************/ 317 #define USBD_DMAEP(e) (1 << (e)) 318 319 /* DD (DMA Descriptor) structure, requires word alignment */ 320 struct lpc32xx_usbd_dd { 321 u32 *dd_next; 322 u32 dd_setup; 323 u32 dd_buffer_addr; 324 u32 dd_status; 325 u32 dd_iso_ps_mem_addr; 326 }; 327 328 /* dd_setup bit defines */ 329 #define DD_SETUP_ATLE_DMA_MODE 0x01 330 #define DD_SETUP_NEXT_DD_VALID 0x04 331 #define DD_SETUP_ISO_EP 0x10 332 #define DD_SETUP_PACKETLEN(n) (((n) & 0x7FF) << 5) 333 #define DD_SETUP_DMALENBYTES(n) (((n) & 0xFFFF) << 16) 334 335 /* dd_status bit defines */ 336 #define DD_STATUS_DD_RETIRED 0x01 337 #define DD_STATUS_STS_MASK 0x1E 338 #define DD_STATUS_STS_NS 0x00 /* Not serviced */ 339 #define DD_STATUS_STS_BS 0x02 /* Being serviced */ 340 #define DD_STATUS_STS_NC 0x04 /* Normal completion */ 341 #define DD_STATUS_STS_DUR 0x06 /* Data underrun (short packet) */ 342 #define DD_STATUS_STS_DOR 0x08 /* Data overrun */ 343 #define DD_STATUS_STS_SE 0x12 /* System error */ 344 #define DD_STATUS_PKT_VAL 0x20 /* Packet valid */ 345 #define DD_STATUS_LSB_EX 0x40 /* LS byte extracted (ATLE) */ 346 #define DD_STATUS_MSB_EX 0x80 /* MS byte extracted (ATLE) */ 347 #define DD_STATUS_MLEN(n) (((n) >> 8) & 0x3F) 348 #define DD_STATUS_CURDMACNT(n) (((n) >> 16) & 0xFFFF) 349 350 /* 351 * 352 * Protocol engine bits below 353 * 354 */ 355 /* Device Interrupt Bit Definitions */ 356 #define FRAME_INT 0x00000001 357 #define EP_FAST_INT 0x00000002 358 #define EP_SLOW_INT 0x00000004 359 #define DEV_STAT_INT 0x00000008 360 #define CCEMTY_INT 0x00000010 361 #define CDFULL_INT 0x00000020 362 #define RxENDPKT_INT 0x00000040 363 #define TxENDPKT_INT 0x00000080 364 #define EP_RLZED_INT 0x00000100 365 #define ERR_INT 0x00000200 366 367 /* Rx & Tx Packet Length Definitions */ 368 #define PKT_LNGTH_MASK 0x000003FF 369 #define PKT_DV 0x00000400 370 #define PKT_RDY 0x00000800 371 372 /* USB Control Definitions */ 373 #define CTRL_RD_EN 0x00000001 374 #define CTRL_WR_EN 0x00000002 375 376 /* Command Codes */ 377 #define CMD_SET_ADDR 0x00D00500 378 #define CMD_CFG_DEV 0x00D80500 379 #define CMD_SET_MODE 0x00F30500 380 #define CMD_RD_FRAME 0x00F50500 381 #define DAT_RD_FRAME 0x00F50200 382 #define CMD_RD_TEST 0x00FD0500 383 #define DAT_RD_TEST 0x00FD0200 384 #define CMD_SET_DEV_STAT 0x00FE0500 385 #define CMD_GET_DEV_STAT 0x00FE0500 386 #define DAT_GET_DEV_STAT 0x00FE0200 387 #define CMD_GET_ERR_CODE 0x00FF0500 388 #define DAT_GET_ERR_CODE 0x00FF0200 389 #define CMD_RD_ERR_STAT 0x00FB0500 390 #define DAT_RD_ERR_STAT 0x00FB0200 391 #define DAT_WR_BYTE(x) (0x00000100 | ((x) << 16)) 392 #define CMD_SEL_EP(x) (0x00000500 | ((x) << 16)) 393 #define DAT_SEL_EP(x) (0x00000200 | ((x) << 16)) 394 #define CMD_SEL_EP_CLRI(x) (0x00400500 | ((x) << 16)) 395 #define DAT_SEL_EP_CLRI(x) (0x00400200 | ((x) << 16)) 396 #define CMD_SET_EP_STAT(x) (0x00400500 | ((x) << 16)) 397 #define CMD_CLR_BUF 0x00F20500 398 #define DAT_CLR_BUF 0x00F20200 399 #define CMD_VALID_BUF 0x00FA0500 400 401 /* Device Address Register Definitions */ 402 #define DEV_ADDR_MASK 0x7F 403 #define DEV_EN 0x80 404 405 /* Device Configure Register Definitions */ 406 #define CONF_DVICE 0x01 407 408 /* Device Mode Register Definitions */ 409 #define AP_CLK 0x01 410 #define INAK_CI 0x02 411 #define INAK_CO 0x04 412 #define INAK_II 0x08 413 #define INAK_IO 0x10 414 #define INAK_BI 0x20 415 #define INAK_BO 0x40 416 417 /* Device Status Register Definitions */ 418 #define DEV_CON 0x01 419 #define DEV_CON_CH 0x02 420 #define DEV_SUS 0x04 421 #define DEV_SUS_CH 0x08 422 #define DEV_RST 0x10 423 424 /* Error Code Register Definitions */ 425 #define ERR_EC_MASK 0x0F 426 #define ERR_EA 0x10 427 428 /* Error Status Register Definitions */ 429 #define ERR_PID 0x01 430 #define ERR_UEPKT 0x02 431 #define ERR_DCRC 0x04 432 #define ERR_TIMOUT 0x08 433 #define ERR_EOP 0x10 434 #define ERR_B_OVRN 0x20 435 #define ERR_BTSTF 0x40 436 #define ERR_TGL 0x80 437 438 /* Endpoint Select Register Definitions */ 439 #define EP_SEL_F 0x01 440 #define EP_SEL_ST 0x02 441 #define EP_SEL_STP 0x04 442 #define EP_SEL_PO 0x08 443 #define EP_SEL_EPN 0x10 444 #define EP_SEL_B_1_FULL 0x20 445 #define EP_SEL_B_2_FULL 0x40 446 447 /* Endpoint Status Register Definitions */ 448 #define EP_STAT_ST 0x01 449 #define EP_STAT_DA 0x20 450 #define EP_STAT_RF_MO 0x40 451 #define EP_STAT_CND_ST 0x80 452 453 /* Clear Buffer Register Definitions */ 454 #define CLR_BUF_PO 0x01 455 456 /* DMA Interrupt Bit Definitions */ 457 #define EOT_INT 0x01 458 #define NDD_REQ_INT 0x02 459 #define SYS_ERR_INT 0x04 460 461 #define DRIVER_VERSION "1.03" 462 static const char driver_name[] = "lpc32xx_udc"; 463 464 /* 465 * 466 * proc interface support 467 * 468 */ 469 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 470 static char *epnames[] = {"INT", "ISO", "BULK", "CTRL"}; 471 static const char debug_filename[] = "driver/udc"; 472 473 static void proc_ep_show(struct seq_file *s, struct lpc32xx_ep *ep) 474 { 475 struct lpc32xx_request *req; 476 477 seq_printf(s, "\n"); 478 seq_printf(s, "%12s, maxpacket %4d %3s", 479 ep->ep.name, ep->ep.maxpacket, 480 ep->is_in ? "in" : "out"); 481 seq_printf(s, " type %4s", epnames[ep->eptype]); 482 seq_printf(s, " ints: %12d", ep->totalints); 483 484 if (list_empty(&ep->queue)) 485 seq_printf(s, "\t(queue empty)\n"); 486 else { 487 list_for_each_entry(req, &ep->queue, queue) { 488 u32 length = req->req.actual; 489 490 seq_printf(s, "\treq %p len %d/%d buf %p\n", 491 &req->req, length, 492 req->req.length, req->req.buf); 493 } 494 } 495 } 496 497 static int udc_show(struct seq_file *s, void *unused) 498 { 499 struct lpc32xx_udc *udc = s->private; 500 struct lpc32xx_ep *ep; 501 unsigned long flags; 502 503 seq_printf(s, "%s: version %s\n", driver_name, DRIVER_VERSION); 504 505 spin_lock_irqsave(&udc->lock, flags); 506 507 seq_printf(s, "vbus %s, pullup %s, %s powered%s, gadget %s\n\n", 508 udc->vbus ? "present" : "off", 509 udc->enabled ? (udc->vbus ? "active" : "enabled") : 510 "disabled", 511 udc->gadget.is_selfpowered ? "self" : "VBUS", 512 udc->suspended ? ", suspended" : "", 513 udc->driver ? udc->driver->driver.name : "(none)"); 514 515 if (udc->enabled && udc->vbus) { 516 proc_ep_show(s, &udc->ep[0]); 517 list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) 518 proc_ep_show(s, ep); 519 } 520 521 spin_unlock_irqrestore(&udc->lock, flags); 522 523 return 0; 524 } 525 526 DEFINE_SHOW_ATTRIBUTE(udc); 527 528 static void create_debug_file(struct lpc32xx_udc *udc) 529 { 530 debugfs_create_file(debug_filename, 0, NULL, udc, &udc_fops); 531 } 532 533 static void remove_debug_file(struct lpc32xx_udc *udc) 534 { 535 debugfs_lookup_and_remove(debug_filename, NULL); 536 } 537 538 #else 539 static inline void create_debug_file(struct lpc32xx_udc *udc) {} 540 static inline void remove_debug_file(struct lpc32xx_udc *udc) {} 541 #endif 542 543 /* Primary initialization sequence for the ISP1301 transceiver */ 544 static void isp1301_udc_configure(struct lpc32xx_udc *udc) 545 { 546 u8 value; 547 s32 vendor, product; 548 549 vendor = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x00); 550 product = i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x02); 551 552 if (vendor == 0x0483 && product == 0xa0c4) 553 udc->atx = STOTG04; 554 555 /* LPC32XX only supports DAT_SE0 USB mode */ 556 /* This sequence is important */ 557 558 /* Disable transparent UART mode first */ 559 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 560 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), 561 MC1_UART_EN); 562 563 /* Set full speed and SE0 mode */ 564 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 565 (ISP1301_I2C_MODE_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); 566 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 567 ISP1301_I2C_MODE_CONTROL_1, (MC1_SPEED_REG | MC1_DAT_SE0)); 568 569 /* 570 * The PSW_OE enable bit state is reversed in the ISP1301 User's Guide 571 */ 572 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 573 (ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); 574 575 value = MC2_BI_DI; 576 if (udc->atx != STOTG04) 577 value |= MC2_SPD_SUSP_CTRL; 578 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 579 ISP1301_I2C_MODE_CONTROL_2, value); 580 581 /* Driver VBUS_DRV high or low depending on board setup */ 582 if (udc->board->vbus_drv_pol != 0) 583 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 584 ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DRV); 585 else 586 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 587 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, 588 OTG1_VBUS_DRV); 589 590 /* Bi-directional mode with suspend control 591 * Enable both pulldowns for now - the pullup will be enable when VBUS 592 * is detected */ 593 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 594 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), ~0); 595 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 596 ISP1301_I2C_OTG_CONTROL_1, 597 (0 | OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN)); 598 599 /* Discharge VBUS (just in case) */ 600 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 601 ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DISCHRG); 602 msleep(1); 603 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 604 (ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR), 605 OTG1_VBUS_DISCHRG); 606 607 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 608 ISP1301_I2C_INTERRUPT_LATCH | ISP1301_I2C_REG_CLEAR_ADDR, ~0); 609 610 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 611 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); 612 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 613 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); 614 615 dev_info(udc->dev, "ISP1301 Vendor ID : 0x%04x\n", vendor); 616 dev_info(udc->dev, "ISP1301 Product ID : 0x%04x\n", product); 617 dev_info(udc->dev, "ISP1301 Version ID : 0x%04x\n", 618 i2c_smbus_read_word_data(udc->isp1301_i2c_client, 0x14)); 619 620 } 621 622 /* Enables or disables the USB device pullup via the ISP1301 transceiver */ 623 static void isp1301_pullup_set(struct lpc32xx_udc *udc) 624 { 625 if (udc->pullup) 626 /* Enable pullup for bus signalling */ 627 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 628 ISP1301_I2C_OTG_CONTROL_1, OTG1_DP_PULLUP); 629 else 630 /* Enable pullup for bus signalling */ 631 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 632 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, 633 OTG1_DP_PULLUP); 634 } 635 636 static void pullup_work(struct work_struct *work) 637 { 638 struct lpc32xx_udc *udc = 639 container_of(work, struct lpc32xx_udc, pullup_job); 640 641 isp1301_pullup_set(udc); 642 } 643 644 static void isp1301_pullup_enable(struct lpc32xx_udc *udc, int en_pullup, 645 int block) 646 { 647 if (en_pullup == udc->pullup) 648 return; 649 650 udc->pullup = en_pullup; 651 if (block) 652 isp1301_pullup_set(udc); 653 else 654 /* defer slow i2c pull up setting */ 655 schedule_work(&udc->pullup_job); 656 } 657 658 #ifdef CONFIG_PM 659 /* Powers up or down the ISP1301 transceiver */ 660 static void isp1301_set_powerstate(struct lpc32xx_udc *udc, int enable) 661 { 662 /* There is no "global power down" register for stotg04 */ 663 if (udc->atx == STOTG04) 664 return; 665 666 if (enable != 0) 667 /* Power up ISP1301 - this ISP1301 will automatically wakeup 668 when VBUS is detected */ 669 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 670 ISP1301_I2C_MODE_CONTROL_2 | ISP1301_I2C_REG_CLEAR_ADDR, 671 MC2_GLOBAL_PWR_DN); 672 else 673 /* Power down ISP1301 */ 674 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 675 ISP1301_I2C_MODE_CONTROL_2, MC2_GLOBAL_PWR_DN); 676 } 677 678 static void power_work(struct work_struct *work) 679 { 680 struct lpc32xx_udc *udc = 681 container_of(work, struct lpc32xx_udc, power_job); 682 683 isp1301_set_powerstate(udc, udc->poweron); 684 } 685 #endif 686 687 /* 688 * 689 * USB protocol engine command/data read/write helper functions 690 * 691 */ 692 /* Issues a single command to the USB device state machine */ 693 static void udc_protocol_cmd_w(struct lpc32xx_udc *udc, u32 cmd) 694 { 695 u32 pass = 0; 696 int to; 697 698 /* EP may lock on CLRI if this read isn't done */ 699 u32 tmp = readl(USBD_DEVINTST(udc->udp_baseaddr)); 700 (void) tmp; 701 702 while (pass == 0) { 703 writel(USBD_CCEMPTY, USBD_DEVINTCLR(udc->udp_baseaddr)); 704 705 /* Write command code */ 706 writel(cmd, USBD_CMDCODE(udc->udp_baseaddr)); 707 to = 10000; 708 while (((readl(USBD_DEVINTST(udc->udp_baseaddr)) & 709 USBD_CCEMPTY) == 0) && (to > 0)) { 710 to--; 711 } 712 713 if (to > 0) 714 pass = 1; 715 716 cpu_relax(); 717 } 718 } 719 720 /* Issues 2 commands (or command and data) to the USB device state machine */ 721 static inline void udc_protocol_cmd_data_w(struct lpc32xx_udc *udc, u32 cmd, 722 u32 data) 723 { 724 udc_protocol_cmd_w(udc, cmd); 725 udc_protocol_cmd_w(udc, data); 726 } 727 728 /* Issues a single command to the USB device state machine and reads 729 * response data */ 730 static u32 udc_protocol_cmd_r(struct lpc32xx_udc *udc, u32 cmd) 731 { 732 int to = 1000; 733 734 /* Write a command and read data from the protocol engine */ 735 writel((USBD_CDFULL | USBD_CCEMPTY), 736 USBD_DEVINTCLR(udc->udp_baseaddr)); 737 738 /* Write command code */ 739 udc_protocol_cmd_w(udc, cmd); 740 741 while ((!(readl(USBD_DEVINTST(udc->udp_baseaddr)) & USBD_CDFULL)) 742 && (to > 0)) 743 to--; 744 if (!to) 745 dev_dbg(udc->dev, 746 "Protocol engine didn't receive response (CDFULL)\n"); 747 748 return readl(USBD_CMDDATA(udc->udp_baseaddr)); 749 } 750 751 /* 752 * 753 * USB device interrupt mask support functions 754 * 755 */ 756 /* Enable one or more USB device interrupts */ 757 static inline void uda_enable_devint(struct lpc32xx_udc *udc, u32 devmask) 758 { 759 udc->enabled_devints |= devmask; 760 writel(udc->enabled_devints, USBD_DEVINTEN(udc->udp_baseaddr)); 761 } 762 763 /* Disable one or more USB device interrupts */ 764 static inline void uda_disable_devint(struct lpc32xx_udc *udc, u32 mask) 765 { 766 udc->enabled_devints &= ~mask; 767 writel(udc->enabled_devints, USBD_DEVINTEN(udc->udp_baseaddr)); 768 } 769 770 /* Clear one or more USB device interrupts */ 771 static inline void uda_clear_devint(struct lpc32xx_udc *udc, u32 mask) 772 { 773 writel(mask, USBD_DEVINTCLR(udc->udp_baseaddr)); 774 } 775 776 /* 777 * 778 * Endpoint interrupt disable/enable functions 779 * 780 */ 781 /* Enable one or more USB endpoint interrupts */ 782 static void uda_enable_hwepint(struct lpc32xx_udc *udc, u32 hwep) 783 { 784 udc->enabled_hwepints |= (1 << hwep); 785 writel(udc->enabled_hwepints, USBD_EPINTEN(udc->udp_baseaddr)); 786 } 787 788 /* Disable one or more USB endpoint interrupts */ 789 static void uda_disable_hwepint(struct lpc32xx_udc *udc, u32 hwep) 790 { 791 udc->enabled_hwepints &= ~(1 << hwep); 792 writel(udc->enabled_hwepints, USBD_EPINTEN(udc->udp_baseaddr)); 793 } 794 795 /* Clear one or more USB endpoint interrupts */ 796 static inline void uda_clear_hwepint(struct lpc32xx_udc *udc, u32 hwep) 797 { 798 writel((1 << hwep), USBD_EPINTCLR(udc->udp_baseaddr)); 799 } 800 801 /* Enable DMA for the HW channel */ 802 static inline void udc_ep_dma_enable(struct lpc32xx_udc *udc, u32 hwep) 803 { 804 writel((1 << hwep), USBD_EPDMAEN(udc->udp_baseaddr)); 805 } 806 807 /* Disable DMA for the HW channel */ 808 static inline void udc_ep_dma_disable(struct lpc32xx_udc *udc, u32 hwep) 809 { 810 writel((1 << hwep), USBD_EPDMADIS(udc->udp_baseaddr)); 811 } 812 813 /* 814 * 815 * Endpoint realize/unrealize functions 816 * 817 */ 818 /* Before an endpoint can be used, it needs to be realized 819 * in the USB protocol engine - this realizes the endpoint. 820 * The interrupt (FIFO or DMA) is not enabled with this function */ 821 static void udc_realize_hwep(struct lpc32xx_udc *udc, u32 hwep, 822 u32 maxpacket) 823 { 824 int to = 1000; 825 826 writel(USBD_EP_RLZED, USBD_DEVINTCLR(udc->udp_baseaddr)); 827 writel(hwep, USBD_EPIND(udc->udp_baseaddr)); 828 udc->realized_eps |= (1 << hwep); 829 writel(udc->realized_eps, USBD_REEP(udc->udp_baseaddr)); 830 writel(maxpacket, USBD_EPMAXPSIZE(udc->udp_baseaddr)); 831 832 /* Wait until endpoint is realized in hardware */ 833 while ((!(readl(USBD_DEVINTST(udc->udp_baseaddr)) & 834 USBD_EP_RLZED)) && (to > 0)) 835 to--; 836 if (!to) 837 dev_dbg(udc->dev, "EP not correctly realized in hardware\n"); 838 839 writel(USBD_EP_RLZED, USBD_DEVINTCLR(udc->udp_baseaddr)); 840 } 841 842 /* Unrealize an EP */ 843 static void udc_unrealize_hwep(struct lpc32xx_udc *udc, u32 hwep) 844 { 845 udc->realized_eps &= ~(1 << hwep); 846 writel(udc->realized_eps, USBD_REEP(udc->udp_baseaddr)); 847 } 848 849 /* 850 * 851 * Endpoint support functions 852 * 853 */ 854 /* Select and clear endpoint interrupt */ 855 static u32 udc_selep_clrint(struct lpc32xx_udc *udc, u32 hwep) 856 { 857 udc_protocol_cmd_w(udc, CMD_SEL_EP_CLRI(hwep)); 858 return udc_protocol_cmd_r(udc, DAT_SEL_EP_CLRI(hwep)); 859 } 860 861 /* Disables the endpoint in the USB protocol engine */ 862 static void udc_disable_hwep(struct lpc32xx_udc *udc, u32 hwep) 863 { 864 udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), 865 DAT_WR_BYTE(EP_STAT_DA)); 866 } 867 868 /* Stalls the endpoint - endpoint will return STALL */ 869 static void udc_stall_hwep(struct lpc32xx_udc *udc, u32 hwep) 870 { 871 udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), 872 DAT_WR_BYTE(EP_STAT_ST)); 873 } 874 875 /* Clear stall or reset endpoint */ 876 static void udc_clrstall_hwep(struct lpc32xx_udc *udc, u32 hwep) 877 { 878 udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(hwep), 879 DAT_WR_BYTE(0)); 880 } 881 882 /* Select an endpoint for endpoint status, clear, validate */ 883 static void udc_select_hwep(struct lpc32xx_udc *udc, u32 hwep) 884 { 885 udc_protocol_cmd_w(udc, CMD_SEL_EP(hwep)); 886 } 887 888 /* 889 * 890 * Endpoint buffer management functions 891 * 892 */ 893 /* Clear the current endpoint's buffer */ 894 static void udc_clr_buffer_hwep(struct lpc32xx_udc *udc, u32 hwep) 895 { 896 udc_select_hwep(udc, hwep); 897 udc_protocol_cmd_w(udc, CMD_CLR_BUF); 898 } 899 900 /* Validate the current endpoint's buffer */ 901 static void udc_val_buffer_hwep(struct lpc32xx_udc *udc, u32 hwep) 902 { 903 udc_select_hwep(udc, hwep); 904 udc_protocol_cmd_w(udc, CMD_VALID_BUF); 905 } 906 907 static inline u32 udc_clearep_getsts(struct lpc32xx_udc *udc, u32 hwep) 908 { 909 /* Clear EP interrupt */ 910 uda_clear_hwepint(udc, hwep); 911 return udc_selep_clrint(udc, hwep); 912 } 913 914 /* 915 * 916 * USB EP DMA support 917 * 918 */ 919 /* Allocate a DMA Descriptor */ 920 static struct lpc32xx_usbd_dd_gad *udc_dd_alloc(struct lpc32xx_udc *udc) 921 { 922 dma_addr_t dma; 923 struct lpc32xx_usbd_dd_gad *dd; 924 925 dd = dma_pool_alloc(udc->dd_cache, GFP_ATOMIC | GFP_DMA, &dma); 926 if (dd) 927 dd->this_dma = dma; 928 929 return dd; 930 } 931 932 /* Free a DMA Descriptor */ 933 static void udc_dd_free(struct lpc32xx_udc *udc, struct lpc32xx_usbd_dd_gad *dd) 934 { 935 dma_pool_free(udc->dd_cache, dd, dd->this_dma); 936 } 937 938 /* 939 * 940 * USB setup and shutdown functions 941 * 942 */ 943 /* Enables or disables most of the USB system clocks when low power mode is 944 * needed. Clocks are typically started on a connection event, and disabled 945 * when a cable is disconnected */ 946 static void udc_clk_set(struct lpc32xx_udc *udc, int enable) 947 { 948 if (enable != 0) { 949 if (udc->clocked) 950 return; 951 952 udc->clocked = 1; 953 clk_prepare_enable(udc->usb_slv_clk); 954 } else { 955 if (!udc->clocked) 956 return; 957 958 udc->clocked = 0; 959 clk_disable_unprepare(udc->usb_slv_clk); 960 } 961 } 962 963 /* Set/reset USB device address */ 964 static void udc_set_address(struct lpc32xx_udc *udc, u32 addr) 965 { 966 /* Address will be latched at the end of the status phase, or 967 latched immediately if function is called twice */ 968 udc_protocol_cmd_data_w(udc, CMD_SET_ADDR, 969 DAT_WR_BYTE(DEV_EN | addr)); 970 } 971 972 /* Setup up a IN request for DMA transfer - this consists of determining the 973 * list of DMA addresses for the transfer, allocating DMA Descriptors, 974 * installing the DD into the UDCA, and then enabling the DMA for that EP */ 975 static int udc_ep_in_req_dma(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) 976 { 977 struct lpc32xx_request *req; 978 u32 hwep = ep->hwep_num; 979 980 ep->req_pending = 1; 981 982 /* There will always be a request waiting here */ 983 req = list_entry(ep->queue.next, struct lpc32xx_request, queue); 984 985 /* Place the DD Descriptor into the UDCA */ 986 udc->udca_v_base[hwep] = req->dd_desc_ptr->this_dma; 987 988 /* Enable DMA and interrupt for the HW EP */ 989 udc_ep_dma_enable(udc, hwep); 990 991 /* Clear ZLP if last packet is not of MAXP size */ 992 if (req->req.length % ep->ep.maxpacket) 993 req->send_zlp = 0; 994 995 return 0; 996 } 997 998 /* Setup up a OUT request for DMA transfer - this consists of determining the 999 * list of DMA addresses for the transfer, allocating DMA Descriptors, 1000 * installing the DD into the UDCA, and then enabling the DMA for that EP */ 1001 static int udc_ep_out_req_dma(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) 1002 { 1003 struct lpc32xx_request *req; 1004 u32 hwep = ep->hwep_num; 1005 1006 ep->req_pending = 1; 1007 1008 /* There will always be a request waiting here */ 1009 req = list_entry(ep->queue.next, struct lpc32xx_request, queue); 1010 1011 /* Place the DD Descriptor into the UDCA */ 1012 udc->udca_v_base[hwep] = req->dd_desc_ptr->this_dma; 1013 1014 /* Enable DMA and interrupt for the HW EP */ 1015 udc_ep_dma_enable(udc, hwep); 1016 return 0; 1017 } 1018 1019 static void udc_disable(struct lpc32xx_udc *udc) 1020 { 1021 u32 i; 1022 1023 /* Disable device */ 1024 udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(0)); 1025 udc_protocol_cmd_data_w(udc, CMD_SET_DEV_STAT, DAT_WR_BYTE(0)); 1026 1027 /* Disable all device interrupts (including EP0) */ 1028 uda_disable_devint(udc, 0x3FF); 1029 1030 /* Disable and reset all endpoint interrupts */ 1031 for (i = 0; i < 32; i++) { 1032 uda_disable_hwepint(udc, i); 1033 uda_clear_hwepint(udc, i); 1034 udc_disable_hwep(udc, i); 1035 udc_unrealize_hwep(udc, i); 1036 udc->udca_v_base[i] = 0; 1037 1038 /* Disable and clear all interrupts and DMA */ 1039 udc_ep_dma_disable(udc, i); 1040 writel((1 << i), USBD_EOTINTCLR(udc->udp_baseaddr)); 1041 writel((1 << i), USBD_NDDRTINTCLR(udc->udp_baseaddr)); 1042 writel((1 << i), USBD_SYSERRTINTCLR(udc->udp_baseaddr)); 1043 writel((1 << i), USBD_DMARCLR(udc->udp_baseaddr)); 1044 } 1045 1046 /* Disable DMA interrupts */ 1047 writel(0, USBD_DMAINTEN(udc->udp_baseaddr)); 1048 1049 writel(0, USBD_UDCAH(udc->udp_baseaddr)); 1050 } 1051 1052 static void udc_enable(struct lpc32xx_udc *udc) 1053 { 1054 u32 i; 1055 struct lpc32xx_ep *ep = &udc->ep[0]; 1056 1057 /* Start with known state */ 1058 udc_disable(udc); 1059 1060 /* Enable device */ 1061 udc_protocol_cmd_data_w(udc, CMD_SET_DEV_STAT, DAT_WR_BYTE(DEV_CON)); 1062 1063 /* EP interrupts on high priority, FRAME interrupt on low priority */ 1064 writel(USBD_EP_FAST, USBD_DEVINTPRI(udc->udp_baseaddr)); 1065 writel(0xFFFF, USBD_EPINTPRI(udc->udp_baseaddr)); 1066 1067 /* Clear any pending device interrupts */ 1068 writel(0x3FF, USBD_DEVINTCLR(udc->udp_baseaddr)); 1069 1070 /* Setup UDCA - not yet used (DMA) */ 1071 writel(udc->udca_p_base, USBD_UDCAH(udc->udp_baseaddr)); 1072 1073 /* Only enable EP0 in and out for now, EP0 only works in FIFO mode */ 1074 for (i = 0; i <= 1; i++) { 1075 udc_realize_hwep(udc, i, ep->ep.maxpacket); 1076 uda_enable_hwepint(udc, i); 1077 udc_select_hwep(udc, i); 1078 udc_clrstall_hwep(udc, i); 1079 udc_clr_buffer_hwep(udc, i); 1080 } 1081 1082 /* Device interrupt setup */ 1083 uda_clear_devint(udc, (USBD_ERR_INT | USBD_DEV_STAT | USBD_EP_SLOW | 1084 USBD_EP_FAST)); 1085 uda_enable_devint(udc, (USBD_ERR_INT | USBD_DEV_STAT | USBD_EP_SLOW | 1086 USBD_EP_FAST)); 1087 1088 /* Set device address to 0 - called twice to force a latch in the USB 1089 engine without the need of a setup packet status closure */ 1090 udc_set_address(udc, 0); 1091 udc_set_address(udc, 0); 1092 1093 /* Enable master DMA interrupts */ 1094 writel((USBD_SYS_ERR_INT | USBD_EOT_INT), 1095 USBD_DMAINTEN(udc->udp_baseaddr)); 1096 1097 udc->dev_status = 0; 1098 } 1099 1100 /* 1101 * 1102 * USB device board specific events handled via callbacks 1103 * 1104 */ 1105 /* Connection change event - notify board function of change */ 1106 static void uda_power_event(struct lpc32xx_udc *udc, u32 conn) 1107 { 1108 /* Just notify of a connection change event (optional) */ 1109 if (udc->board->conn_chgb != NULL) 1110 udc->board->conn_chgb(conn); 1111 } 1112 1113 /* Suspend/resume event - notify board function of change */ 1114 static void uda_resm_susp_event(struct lpc32xx_udc *udc, u32 conn) 1115 { 1116 /* Just notify of a Suspend/resume change event (optional) */ 1117 if (udc->board->susp_chgb != NULL) 1118 udc->board->susp_chgb(conn); 1119 1120 if (conn) 1121 udc->suspended = 0; 1122 else 1123 udc->suspended = 1; 1124 } 1125 1126 /* Remote wakeup enable/disable - notify board function of change */ 1127 static void uda_remwkp_cgh(struct lpc32xx_udc *udc) 1128 { 1129 if (udc->board->rmwk_chgb != NULL) 1130 udc->board->rmwk_chgb(udc->dev_status & 1131 (1 << USB_DEVICE_REMOTE_WAKEUP)); 1132 } 1133 1134 /* Reads data from FIFO, adjusts for alignment and data size */ 1135 static void udc_pop_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes) 1136 { 1137 int n, i, bl; 1138 u16 *p16; 1139 u32 *p32, tmp, cbytes; 1140 1141 /* Use optimal data transfer method based on source address and size */ 1142 switch (((uintptr_t) data) & 0x3) { 1143 case 0: /* 32-bit aligned */ 1144 p32 = (u32 *) data; 1145 cbytes = (bytes & ~0x3); 1146 1147 /* Copy 32-bit aligned data first */ 1148 for (n = 0; n < cbytes; n += 4) 1149 *p32++ = readl(USBD_RXDATA(udc->udp_baseaddr)); 1150 1151 /* Handle any remaining bytes */ 1152 bl = bytes - cbytes; 1153 if (bl) { 1154 tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); 1155 for (n = 0; n < bl; n++) 1156 data[cbytes + n] = ((tmp >> (n * 8)) & 0xFF); 1157 1158 } 1159 break; 1160 1161 case 1: /* 8-bit aligned */ 1162 case 3: 1163 /* Each byte has to be handled independently */ 1164 for (n = 0; n < bytes; n += 4) { 1165 tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); 1166 1167 bl = bytes - n; 1168 if (bl > 4) 1169 bl = 4; 1170 1171 for (i = 0; i < bl; i++) 1172 data[n + i] = (u8) ((tmp >> (i * 8)) & 0xFF); 1173 } 1174 break; 1175 1176 case 2: /* 16-bit aligned */ 1177 p16 = (u16 *) data; 1178 cbytes = (bytes & ~0x3); 1179 1180 /* Copy 32-bit sized objects first with 16-bit alignment */ 1181 for (n = 0; n < cbytes; n += 4) { 1182 tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); 1183 *p16++ = (u16)(tmp & 0xFFFF); 1184 *p16++ = (u16)((tmp >> 16) & 0xFFFF); 1185 } 1186 1187 /* Handle any remaining bytes */ 1188 bl = bytes - cbytes; 1189 if (bl) { 1190 tmp = readl(USBD_RXDATA(udc->udp_baseaddr)); 1191 for (n = 0; n < bl; n++) 1192 data[cbytes + n] = ((tmp >> (n * 8)) & 0xFF); 1193 } 1194 break; 1195 } 1196 } 1197 1198 /* Read data from the FIFO for an endpoint. This function is for endpoints (such 1199 * as EP0) that don't use DMA. This function should only be called if a packet 1200 * is known to be ready to read for the endpoint. Note that the endpoint must 1201 * be selected in the protocol engine prior to this call. */ 1202 static u32 udc_read_hwep(struct lpc32xx_udc *udc, u32 hwep, u32 *data, 1203 u32 bytes) 1204 { 1205 u32 tmpv; 1206 int to = 1000; 1207 u32 tmp, hwrep = ((hwep & 0x1E) << 1) | CTRL_RD_EN; 1208 1209 /* Setup read of endpoint */ 1210 writel(hwrep, USBD_CTRL(udc->udp_baseaddr)); 1211 1212 /* Wait until packet is ready */ 1213 while ((((tmpv = readl(USBD_RXPLEN(udc->udp_baseaddr))) & 1214 PKT_RDY) == 0) && (to > 0)) 1215 to--; 1216 if (!to) 1217 dev_dbg(udc->dev, "No packet ready on FIFO EP read\n"); 1218 1219 /* Mask out count */ 1220 tmp = tmpv & PKT_LNGTH_MASK; 1221 if (bytes < tmp) 1222 tmp = bytes; 1223 1224 if ((tmp > 0) && (data != NULL)) 1225 udc_pop_fifo(udc, (u8 *) data, tmp); 1226 1227 writel(((hwep & 0x1E) << 1), USBD_CTRL(udc->udp_baseaddr)); 1228 1229 /* Clear the buffer */ 1230 udc_clr_buffer_hwep(udc, hwep); 1231 1232 return tmp; 1233 } 1234 1235 /* Stuffs data into the FIFO, adjusts for alignment and data size */ 1236 static void udc_stuff_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes) 1237 { 1238 int n, i, bl; 1239 u16 *p16; 1240 u32 *p32, tmp, cbytes; 1241 1242 /* Use optimal data transfer method based on source address and size */ 1243 switch (((uintptr_t) data) & 0x3) { 1244 case 0: /* 32-bit aligned */ 1245 p32 = (u32 *) data; 1246 cbytes = (bytes & ~0x3); 1247 1248 /* Copy 32-bit aligned data first */ 1249 for (n = 0; n < cbytes; n += 4) 1250 writel(*p32++, USBD_TXDATA(udc->udp_baseaddr)); 1251 1252 /* Handle any remaining bytes */ 1253 bl = bytes - cbytes; 1254 if (bl) { 1255 tmp = 0; 1256 for (n = 0; n < bl; n++) 1257 tmp |= data[cbytes + n] << (n * 8); 1258 1259 writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); 1260 } 1261 break; 1262 1263 case 1: /* 8-bit aligned */ 1264 case 3: 1265 /* Each byte has to be handled independently */ 1266 for (n = 0; n < bytes; n += 4) { 1267 bl = bytes - n; 1268 if (bl > 4) 1269 bl = 4; 1270 1271 tmp = 0; 1272 for (i = 0; i < bl; i++) 1273 tmp |= data[n + i] << (i * 8); 1274 1275 writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); 1276 } 1277 break; 1278 1279 case 2: /* 16-bit aligned */ 1280 p16 = (u16 *) data; 1281 cbytes = (bytes & ~0x3); 1282 1283 /* Copy 32-bit aligned data first */ 1284 for (n = 0; n < cbytes; n += 4) { 1285 tmp = *p16++ & 0xFFFF; 1286 tmp |= (*p16++ & 0xFFFF) << 16; 1287 writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); 1288 } 1289 1290 /* Handle any remaining bytes */ 1291 bl = bytes - cbytes; 1292 if (bl) { 1293 tmp = 0; 1294 for (n = 0; n < bl; n++) 1295 tmp |= data[cbytes + n] << (n * 8); 1296 1297 writel(tmp, USBD_TXDATA(udc->udp_baseaddr)); 1298 } 1299 break; 1300 } 1301 } 1302 1303 /* Write data to the FIFO for an endpoint. This function is for endpoints (such 1304 * as EP0) that don't use DMA. Note that the endpoint must be selected in the 1305 * protocol engine prior to this call. */ 1306 static void udc_write_hwep(struct lpc32xx_udc *udc, u32 hwep, u32 *data, 1307 u32 bytes) 1308 { 1309 u32 hwwep = ((hwep & 0x1E) << 1) | CTRL_WR_EN; 1310 1311 if ((bytes > 0) && (data == NULL)) 1312 return; 1313 1314 /* Setup write of endpoint */ 1315 writel(hwwep, USBD_CTRL(udc->udp_baseaddr)); 1316 1317 writel(bytes, USBD_TXPLEN(udc->udp_baseaddr)); 1318 1319 /* Need at least 1 byte to trigger TX */ 1320 if (bytes == 0) 1321 writel(0, USBD_TXDATA(udc->udp_baseaddr)); 1322 else 1323 udc_stuff_fifo(udc, (u8 *) data, bytes); 1324 1325 writel(((hwep & 0x1E) << 1), USBD_CTRL(udc->udp_baseaddr)); 1326 1327 udc_val_buffer_hwep(udc, hwep); 1328 } 1329 1330 /* USB device reset - resets USB to a default state with just EP0 1331 enabled */ 1332 static void uda_usb_reset(struct lpc32xx_udc *udc) 1333 { 1334 u32 i = 0; 1335 /* Re-init device controller and EP0 */ 1336 udc_enable(udc); 1337 udc->gadget.speed = USB_SPEED_FULL; 1338 1339 for (i = 1; i < NUM_ENDPOINTS; i++) { 1340 struct lpc32xx_ep *ep = &udc->ep[i]; 1341 ep->req_pending = 0; 1342 } 1343 } 1344 1345 /* Send a ZLP on EP0 */ 1346 static void udc_ep0_send_zlp(struct lpc32xx_udc *udc) 1347 { 1348 udc_write_hwep(udc, EP_IN, NULL, 0); 1349 } 1350 1351 /* Get current frame number */ 1352 static u16 udc_get_current_frame(struct lpc32xx_udc *udc) 1353 { 1354 u16 flo, fhi; 1355 1356 udc_protocol_cmd_w(udc, CMD_RD_FRAME); 1357 flo = (u16) udc_protocol_cmd_r(udc, DAT_RD_FRAME); 1358 fhi = (u16) udc_protocol_cmd_r(udc, DAT_RD_FRAME); 1359 1360 return (fhi << 8) | flo; 1361 } 1362 1363 /* Set the device as configured - enables all endpoints */ 1364 static inline void udc_set_device_configured(struct lpc32xx_udc *udc) 1365 { 1366 udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(CONF_DVICE)); 1367 } 1368 1369 /* Set the device as unconfigured - disables all endpoints */ 1370 static inline void udc_set_device_unconfigured(struct lpc32xx_udc *udc) 1371 { 1372 udc_protocol_cmd_data_w(udc, CMD_CFG_DEV, DAT_WR_BYTE(0)); 1373 } 1374 1375 /* reinit == restore initial software state */ 1376 static void udc_reinit(struct lpc32xx_udc *udc) 1377 { 1378 u32 i; 1379 1380 INIT_LIST_HEAD(&udc->gadget.ep_list); 1381 INIT_LIST_HEAD(&udc->gadget.ep0->ep_list); 1382 1383 for (i = 0; i < NUM_ENDPOINTS; i++) { 1384 struct lpc32xx_ep *ep = &udc->ep[i]; 1385 1386 if (i != 0) 1387 list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list); 1388 usb_ep_set_maxpacket_limit(&ep->ep, ep->maxpacket); 1389 INIT_LIST_HEAD(&ep->queue); 1390 ep->req_pending = 0; 1391 } 1392 1393 udc->ep0state = WAIT_FOR_SETUP; 1394 } 1395 1396 /* Must be called with lock */ 1397 static void done(struct lpc32xx_ep *ep, struct lpc32xx_request *req, int status) 1398 { 1399 struct lpc32xx_udc *udc = ep->udc; 1400 1401 list_del_init(&req->queue); 1402 if (req->req.status == -EINPROGRESS) 1403 req->req.status = status; 1404 else 1405 status = req->req.status; 1406 1407 if (ep->lep) { 1408 usb_gadget_unmap_request(&udc->gadget, &req->req, ep->is_in); 1409 1410 /* Free DDs */ 1411 udc_dd_free(udc, req->dd_desc_ptr); 1412 } 1413 1414 if (status && status != -ESHUTDOWN) 1415 ep_dbg(ep, "%s done %p, status %d\n", ep->ep.name, req, status); 1416 1417 ep->req_pending = 0; 1418 spin_unlock(&udc->lock); 1419 usb_gadget_giveback_request(&ep->ep, &req->req); 1420 spin_lock(&udc->lock); 1421 } 1422 1423 /* Must be called with lock */ 1424 static void nuke(struct lpc32xx_ep *ep, int status) 1425 { 1426 struct lpc32xx_request *req; 1427 1428 while (!list_empty(&ep->queue)) { 1429 req = list_entry(ep->queue.next, struct lpc32xx_request, queue); 1430 done(ep, req, status); 1431 } 1432 1433 if (status == -ESHUTDOWN) { 1434 uda_disable_hwepint(ep->udc, ep->hwep_num); 1435 udc_disable_hwep(ep->udc, ep->hwep_num); 1436 } 1437 } 1438 1439 /* IN endpoint 0 transfer */ 1440 static int udc_ep0_in_req(struct lpc32xx_udc *udc) 1441 { 1442 struct lpc32xx_request *req; 1443 struct lpc32xx_ep *ep0 = &udc->ep[0]; 1444 u32 tsend, ts = 0; 1445 1446 if (list_empty(&ep0->queue)) 1447 /* Nothing to send */ 1448 return 0; 1449 else 1450 req = list_entry(ep0->queue.next, struct lpc32xx_request, 1451 queue); 1452 1453 tsend = ts = req->req.length - req->req.actual; 1454 if (ts == 0) { 1455 /* Send a ZLP */ 1456 udc_ep0_send_zlp(udc); 1457 done(ep0, req, 0); 1458 return 1; 1459 } else if (ts > ep0->ep.maxpacket) 1460 ts = ep0->ep.maxpacket; /* Just send what we can */ 1461 1462 /* Write data to the EP0 FIFO and start transfer */ 1463 udc_write_hwep(udc, EP_IN, (req->req.buf + req->req.actual), ts); 1464 1465 /* Increment data pointer */ 1466 req->req.actual += ts; 1467 1468 if (tsend >= ep0->ep.maxpacket) 1469 return 0; /* Stay in data transfer state */ 1470 1471 /* Transfer request is complete */ 1472 udc->ep0state = WAIT_FOR_SETUP; 1473 done(ep0, req, 0); 1474 return 1; 1475 } 1476 1477 /* OUT endpoint 0 transfer */ 1478 static int udc_ep0_out_req(struct lpc32xx_udc *udc) 1479 { 1480 struct lpc32xx_request *req; 1481 struct lpc32xx_ep *ep0 = &udc->ep[0]; 1482 u32 tr, bufferspace; 1483 1484 if (list_empty(&ep0->queue)) 1485 return 0; 1486 else 1487 req = list_entry(ep0->queue.next, struct lpc32xx_request, 1488 queue); 1489 1490 if (req) { 1491 if (req->req.length == 0) { 1492 /* Just dequeue request */ 1493 done(ep0, req, 0); 1494 udc->ep0state = WAIT_FOR_SETUP; 1495 return 1; 1496 } 1497 1498 /* Get data from FIFO */ 1499 bufferspace = req->req.length - req->req.actual; 1500 if (bufferspace > ep0->ep.maxpacket) 1501 bufferspace = ep0->ep.maxpacket; 1502 1503 /* Copy data to buffer */ 1504 prefetchw(req->req.buf + req->req.actual); 1505 tr = udc_read_hwep(udc, EP_OUT, req->req.buf + req->req.actual, 1506 bufferspace); 1507 req->req.actual += bufferspace; 1508 1509 if (tr < ep0->ep.maxpacket) { 1510 /* This is the last packet */ 1511 done(ep0, req, 0); 1512 udc->ep0state = WAIT_FOR_SETUP; 1513 return 1; 1514 } 1515 } 1516 1517 return 0; 1518 } 1519 1520 /* Must be called with lock */ 1521 static void stop_activity(struct lpc32xx_udc *udc) 1522 { 1523 struct usb_gadget_driver *driver = udc->driver; 1524 int i; 1525 1526 if (udc->gadget.speed == USB_SPEED_UNKNOWN) 1527 driver = NULL; 1528 1529 udc->gadget.speed = USB_SPEED_UNKNOWN; 1530 udc->suspended = 0; 1531 1532 for (i = 0; i < NUM_ENDPOINTS; i++) { 1533 struct lpc32xx_ep *ep = &udc->ep[i]; 1534 nuke(ep, -ESHUTDOWN); 1535 } 1536 if (driver) { 1537 spin_unlock(&udc->lock); 1538 driver->disconnect(&udc->gadget); 1539 spin_lock(&udc->lock); 1540 } 1541 1542 isp1301_pullup_enable(udc, 0, 0); 1543 udc_disable(udc); 1544 udc_reinit(udc); 1545 } 1546 1547 /* 1548 * Activate or kill host pullup 1549 * Can be called with or without lock 1550 */ 1551 static void pullup(struct lpc32xx_udc *udc, int is_on) 1552 { 1553 if (!udc->clocked) 1554 return; 1555 1556 if (!udc->enabled || !udc->vbus) 1557 is_on = 0; 1558 1559 if (is_on != udc->pullup) 1560 isp1301_pullup_enable(udc, is_on, 0); 1561 } 1562 1563 /* Must be called without lock */ 1564 static int lpc32xx_ep_disable(struct usb_ep *_ep) 1565 { 1566 struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); 1567 struct lpc32xx_udc *udc = ep->udc; 1568 unsigned long flags; 1569 1570 if ((ep->hwep_num_base == 0) || (ep->hwep_num == 0)) 1571 return -EINVAL; 1572 spin_lock_irqsave(&udc->lock, flags); 1573 1574 nuke(ep, -ESHUTDOWN); 1575 1576 /* Clear all DMA statuses for this EP */ 1577 udc_ep_dma_disable(udc, ep->hwep_num); 1578 writel(1 << ep->hwep_num, USBD_EOTINTCLR(udc->udp_baseaddr)); 1579 writel(1 << ep->hwep_num, USBD_NDDRTINTCLR(udc->udp_baseaddr)); 1580 writel(1 << ep->hwep_num, USBD_SYSERRTINTCLR(udc->udp_baseaddr)); 1581 writel(1 << ep->hwep_num, USBD_DMARCLR(udc->udp_baseaddr)); 1582 1583 /* Remove the DD pointer in the UDCA */ 1584 udc->udca_v_base[ep->hwep_num] = 0; 1585 1586 /* Disable and reset endpoint and interrupt */ 1587 uda_clear_hwepint(udc, ep->hwep_num); 1588 udc_unrealize_hwep(udc, ep->hwep_num); 1589 1590 ep->hwep_num = 0; 1591 1592 spin_unlock_irqrestore(&udc->lock, flags); 1593 1594 atomic_dec(&udc->enabled_ep_cnt); 1595 wake_up(&udc->ep_disable_wait_queue); 1596 1597 return 0; 1598 } 1599 1600 /* Must be called without lock */ 1601 static int lpc32xx_ep_enable(struct usb_ep *_ep, 1602 const struct usb_endpoint_descriptor *desc) 1603 { 1604 struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); 1605 struct lpc32xx_udc *udc; 1606 u16 maxpacket; 1607 u32 tmp; 1608 unsigned long flags; 1609 1610 /* Verify EP data */ 1611 if ((!_ep) || (!ep) || (!desc) || 1612 (desc->bDescriptorType != USB_DT_ENDPOINT)) 1613 return -EINVAL; 1614 1615 udc = ep->udc; 1616 maxpacket = usb_endpoint_maxp(desc); 1617 if ((maxpacket == 0) || (maxpacket > ep->maxpacket)) { 1618 dev_dbg(udc->dev, "bad ep descriptor's packet size\n"); 1619 return -EINVAL; 1620 } 1621 1622 /* Don't touch EP0 */ 1623 if (ep->hwep_num_base == 0) { 1624 dev_dbg(udc->dev, "Can't re-enable EP0!!!\n"); 1625 return -EINVAL; 1626 } 1627 1628 /* Is driver ready? */ 1629 if ((!udc->driver) || (udc->gadget.speed == USB_SPEED_UNKNOWN)) { 1630 dev_dbg(udc->dev, "bogus device state\n"); 1631 return -ESHUTDOWN; 1632 } 1633 1634 tmp = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK; 1635 switch (tmp) { 1636 case USB_ENDPOINT_XFER_CONTROL: 1637 return -EINVAL; 1638 1639 case USB_ENDPOINT_XFER_INT: 1640 if (maxpacket > ep->maxpacket) { 1641 dev_dbg(udc->dev, 1642 "Bad INT endpoint maxpacket %d\n", maxpacket); 1643 return -EINVAL; 1644 } 1645 break; 1646 1647 case USB_ENDPOINT_XFER_BULK: 1648 switch (maxpacket) { 1649 case 8: 1650 case 16: 1651 case 32: 1652 case 64: 1653 break; 1654 1655 default: 1656 dev_dbg(udc->dev, 1657 "Bad BULK endpoint maxpacket %d\n", maxpacket); 1658 return -EINVAL; 1659 } 1660 break; 1661 1662 case USB_ENDPOINT_XFER_ISOC: 1663 break; 1664 } 1665 spin_lock_irqsave(&udc->lock, flags); 1666 1667 /* Initialize endpoint to match the selected descriptor */ 1668 ep->is_in = (desc->bEndpointAddress & USB_DIR_IN) != 0; 1669 ep->ep.maxpacket = maxpacket; 1670 1671 /* Map hardware endpoint from base and direction */ 1672 if (ep->is_in) 1673 /* IN endpoints are offset 1 from the OUT endpoint */ 1674 ep->hwep_num = ep->hwep_num_base + EP_IN; 1675 else 1676 ep->hwep_num = ep->hwep_num_base; 1677 1678 ep_dbg(ep, "EP enabled: %s, HW:%d, MP:%d IN:%d\n", ep->ep.name, 1679 ep->hwep_num, maxpacket, (ep->is_in == 1)); 1680 1681 /* Realize the endpoint, interrupt is enabled later when 1682 * buffers are queued, IN EPs will NAK until buffers are ready */ 1683 udc_realize_hwep(udc, ep->hwep_num, ep->ep.maxpacket); 1684 udc_clr_buffer_hwep(udc, ep->hwep_num); 1685 uda_disable_hwepint(udc, ep->hwep_num); 1686 udc_clrstall_hwep(udc, ep->hwep_num); 1687 1688 /* Clear all DMA statuses for this EP */ 1689 udc_ep_dma_disable(udc, ep->hwep_num); 1690 writel(1 << ep->hwep_num, USBD_EOTINTCLR(udc->udp_baseaddr)); 1691 writel(1 << ep->hwep_num, USBD_NDDRTINTCLR(udc->udp_baseaddr)); 1692 writel(1 << ep->hwep_num, USBD_SYSERRTINTCLR(udc->udp_baseaddr)); 1693 writel(1 << ep->hwep_num, USBD_DMARCLR(udc->udp_baseaddr)); 1694 1695 spin_unlock_irqrestore(&udc->lock, flags); 1696 1697 atomic_inc(&udc->enabled_ep_cnt); 1698 return 0; 1699 } 1700 1701 /* 1702 * Allocate a USB request list 1703 * Can be called with or without lock 1704 */ 1705 static struct usb_request *lpc32xx_ep_alloc_request(struct usb_ep *_ep, 1706 gfp_t gfp_flags) 1707 { 1708 struct lpc32xx_request *req; 1709 1710 req = kzalloc(sizeof(struct lpc32xx_request), gfp_flags); 1711 if (!req) 1712 return NULL; 1713 1714 INIT_LIST_HEAD(&req->queue); 1715 return &req->req; 1716 } 1717 1718 /* 1719 * De-allocate a USB request list 1720 * Can be called with or without lock 1721 */ 1722 static void lpc32xx_ep_free_request(struct usb_ep *_ep, 1723 struct usb_request *_req) 1724 { 1725 struct lpc32xx_request *req; 1726 1727 req = container_of(_req, struct lpc32xx_request, req); 1728 BUG_ON(!list_empty(&req->queue)); 1729 kfree(req); 1730 } 1731 1732 /* Must be called without lock */ 1733 static int lpc32xx_ep_queue(struct usb_ep *_ep, 1734 struct usb_request *_req, gfp_t gfp_flags) 1735 { 1736 struct lpc32xx_request *req; 1737 struct lpc32xx_ep *ep; 1738 struct lpc32xx_udc *udc; 1739 unsigned long flags; 1740 int status = 0; 1741 1742 req = container_of(_req, struct lpc32xx_request, req); 1743 ep = container_of(_ep, struct lpc32xx_ep, ep); 1744 1745 if (!_ep || !_req || !_req->complete || !_req->buf || 1746 !list_empty(&req->queue)) 1747 return -EINVAL; 1748 1749 udc = ep->udc; 1750 1751 if (udc->gadget.speed == USB_SPEED_UNKNOWN) 1752 return -EPIPE; 1753 1754 if (ep->lep) { 1755 struct lpc32xx_usbd_dd_gad *dd; 1756 1757 status = usb_gadget_map_request(&udc->gadget, _req, ep->is_in); 1758 if (status) 1759 return status; 1760 1761 /* For the request, build a list of DDs */ 1762 dd = udc_dd_alloc(udc); 1763 if (!dd) { 1764 /* Error allocating DD */ 1765 return -ENOMEM; 1766 } 1767 req->dd_desc_ptr = dd; 1768 1769 /* Setup the DMA descriptor */ 1770 dd->dd_next_phy = dd->dd_next_v = 0; 1771 dd->dd_buffer_addr = req->req.dma; 1772 dd->dd_status = 0; 1773 1774 /* Special handling for ISO EPs */ 1775 if (ep->eptype == EP_ISO_TYPE) { 1776 dd->dd_setup = DD_SETUP_ISO_EP | 1777 DD_SETUP_PACKETLEN(0) | 1778 DD_SETUP_DMALENBYTES(1); 1779 dd->dd_iso_ps_mem_addr = dd->this_dma + 24; 1780 if (ep->is_in) 1781 dd->iso_status[0] = req->req.length; 1782 else 1783 dd->iso_status[0] = 0; 1784 } else 1785 dd->dd_setup = DD_SETUP_PACKETLEN(ep->ep.maxpacket) | 1786 DD_SETUP_DMALENBYTES(req->req.length); 1787 } 1788 1789 ep_dbg(ep, "%s queue req %p len %d buf %p (in=%d) z=%d\n", _ep->name, 1790 _req, _req->length, _req->buf, ep->is_in, _req->zero); 1791 1792 spin_lock_irqsave(&udc->lock, flags); 1793 1794 _req->status = -EINPROGRESS; 1795 _req->actual = 0; 1796 req->send_zlp = _req->zero; 1797 1798 /* Kickstart empty queues */ 1799 if (list_empty(&ep->queue)) { 1800 list_add_tail(&req->queue, &ep->queue); 1801 1802 if (ep->hwep_num_base == 0) { 1803 /* Handle expected data direction */ 1804 if (ep->is_in) { 1805 /* IN packet to host */ 1806 udc->ep0state = DATA_IN; 1807 status = udc_ep0_in_req(udc); 1808 } else { 1809 /* OUT packet from host */ 1810 udc->ep0state = DATA_OUT; 1811 status = udc_ep0_out_req(udc); 1812 } 1813 } else if (ep->is_in) { 1814 /* IN packet to host and kick off transfer */ 1815 if (!ep->req_pending) 1816 udc_ep_in_req_dma(udc, ep); 1817 } else 1818 /* OUT packet from host and kick off list */ 1819 if (!ep->req_pending) 1820 udc_ep_out_req_dma(udc, ep); 1821 } else 1822 list_add_tail(&req->queue, &ep->queue); 1823 1824 spin_unlock_irqrestore(&udc->lock, flags); 1825 1826 return (status < 0) ? status : 0; 1827 } 1828 1829 /* Must be called without lock */ 1830 static int lpc32xx_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req) 1831 { 1832 struct lpc32xx_ep *ep; 1833 struct lpc32xx_request *req = NULL, *iter; 1834 unsigned long flags; 1835 1836 ep = container_of(_ep, struct lpc32xx_ep, ep); 1837 if (!_ep || ep->hwep_num_base == 0) 1838 return -EINVAL; 1839 1840 spin_lock_irqsave(&ep->udc->lock, flags); 1841 1842 /* make sure it's actually queued on this endpoint */ 1843 list_for_each_entry(iter, &ep->queue, queue) { 1844 if (&iter->req != _req) 1845 continue; 1846 req = iter; 1847 break; 1848 } 1849 if (!req) { 1850 spin_unlock_irqrestore(&ep->udc->lock, flags); 1851 return -EINVAL; 1852 } 1853 1854 done(ep, req, -ECONNRESET); 1855 1856 spin_unlock_irqrestore(&ep->udc->lock, flags); 1857 1858 return 0; 1859 } 1860 1861 /* Must be called without lock */ 1862 static int lpc32xx_ep_set_halt(struct usb_ep *_ep, int value) 1863 { 1864 struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); 1865 struct lpc32xx_udc *udc; 1866 unsigned long flags; 1867 1868 if ((!ep) || (ep->hwep_num <= 1)) 1869 return -EINVAL; 1870 1871 /* Don't halt an IN EP */ 1872 if (ep->is_in) 1873 return -EAGAIN; 1874 1875 udc = ep->udc; 1876 spin_lock_irqsave(&udc->lock, flags); 1877 1878 if (value == 1) { 1879 /* stall */ 1880 udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(ep->hwep_num), 1881 DAT_WR_BYTE(EP_STAT_ST)); 1882 } else { 1883 /* End stall */ 1884 ep->wedge = 0; 1885 udc_protocol_cmd_data_w(udc, CMD_SET_EP_STAT(ep->hwep_num), 1886 DAT_WR_BYTE(0)); 1887 } 1888 1889 spin_unlock_irqrestore(&udc->lock, flags); 1890 1891 return 0; 1892 } 1893 1894 /* set the halt feature and ignores clear requests */ 1895 static int lpc32xx_ep_set_wedge(struct usb_ep *_ep) 1896 { 1897 struct lpc32xx_ep *ep = container_of(_ep, struct lpc32xx_ep, ep); 1898 1899 if (!_ep || !ep->udc) 1900 return -EINVAL; 1901 1902 ep->wedge = 1; 1903 1904 return usb_ep_set_halt(_ep); 1905 } 1906 1907 static const struct usb_ep_ops lpc32xx_ep_ops = { 1908 .enable = lpc32xx_ep_enable, 1909 .disable = lpc32xx_ep_disable, 1910 .alloc_request = lpc32xx_ep_alloc_request, 1911 .free_request = lpc32xx_ep_free_request, 1912 .queue = lpc32xx_ep_queue, 1913 .dequeue = lpc32xx_ep_dequeue, 1914 .set_halt = lpc32xx_ep_set_halt, 1915 .set_wedge = lpc32xx_ep_set_wedge, 1916 }; 1917 1918 /* Send a ZLP on a non-0 IN EP */ 1919 static void udc_send_in_zlp(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) 1920 { 1921 /* Clear EP status */ 1922 udc_clearep_getsts(udc, ep->hwep_num); 1923 1924 /* Send ZLP via FIFO mechanism */ 1925 udc_write_hwep(udc, ep->hwep_num, NULL, 0); 1926 } 1927 1928 /* 1929 * Handle EP completion for ZLP 1930 * This function will only be called when a delayed ZLP needs to be sent out 1931 * after a DMA transfer has filled both buffers. 1932 */ 1933 static void udc_handle_eps(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) 1934 { 1935 u32 epstatus; 1936 struct lpc32xx_request *req; 1937 1938 if (ep->hwep_num <= 0) 1939 return; 1940 1941 uda_clear_hwepint(udc, ep->hwep_num); 1942 1943 /* If this interrupt isn't enabled, return now */ 1944 if (!(udc->enabled_hwepints & (1 << ep->hwep_num))) 1945 return; 1946 1947 /* Get endpoint status */ 1948 epstatus = udc_clearep_getsts(udc, ep->hwep_num); 1949 1950 /* 1951 * This should never happen, but protect against writing to the 1952 * buffer when full. 1953 */ 1954 if (epstatus & EP_SEL_F) 1955 return; 1956 1957 if (ep->is_in) { 1958 udc_send_in_zlp(udc, ep); 1959 uda_disable_hwepint(udc, ep->hwep_num); 1960 } else 1961 return; 1962 1963 /* If there isn't a request waiting, something went wrong */ 1964 req = list_entry(ep->queue.next, struct lpc32xx_request, queue); 1965 if (req) { 1966 done(ep, req, 0); 1967 1968 /* Start another request if ready */ 1969 if (!list_empty(&ep->queue)) { 1970 if (ep->is_in) 1971 udc_ep_in_req_dma(udc, ep); 1972 else 1973 udc_ep_out_req_dma(udc, ep); 1974 } else 1975 ep->req_pending = 0; 1976 } 1977 } 1978 1979 1980 /* DMA end of transfer completion */ 1981 static void udc_handle_dma_ep(struct lpc32xx_udc *udc, struct lpc32xx_ep *ep) 1982 { 1983 u32 status; 1984 struct lpc32xx_request *req; 1985 struct lpc32xx_usbd_dd_gad *dd; 1986 1987 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 1988 ep->totalints++; 1989 #endif 1990 1991 req = list_entry(ep->queue.next, struct lpc32xx_request, queue); 1992 if (!req) { 1993 ep_err(ep, "DMA interrupt on no req!\n"); 1994 return; 1995 } 1996 dd = req->dd_desc_ptr; 1997 1998 /* DMA descriptor should always be retired for this call */ 1999 if (!(dd->dd_status & DD_STATUS_DD_RETIRED)) 2000 ep_warn(ep, "DMA descriptor did not retire\n"); 2001 2002 /* Disable DMA */ 2003 udc_ep_dma_disable(udc, ep->hwep_num); 2004 writel((1 << ep->hwep_num), USBD_EOTINTCLR(udc->udp_baseaddr)); 2005 writel((1 << ep->hwep_num), USBD_NDDRTINTCLR(udc->udp_baseaddr)); 2006 2007 /* System error? */ 2008 if (readl(USBD_SYSERRTINTST(udc->udp_baseaddr)) & 2009 (1 << ep->hwep_num)) { 2010 writel((1 << ep->hwep_num), 2011 USBD_SYSERRTINTCLR(udc->udp_baseaddr)); 2012 ep_err(ep, "AHB critical error!\n"); 2013 ep->req_pending = 0; 2014 2015 /* The error could have occurred on a packet of a multipacket 2016 * transfer, so recovering the transfer is not possible. Close 2017 * the request with an error */ 2018 done(ep, req, -ECONNABORTED); 2019 return; 2020 } 2021 2022 /* Handle the current DD's status */ 2023 status = dd->dd_status; 2024 switch (status & DD_STATUS_STS_MASK) { 2025 case DD_STATUS_STS_NS: 2026 /* DD not serviced? This shouldn't happen! */ 2027 ep->req_pending = 0; 2028 ep_err(ep, "DMA critical EP error: DD not serviced (0x%x)!\n", 2029 status); 2030 2031 done(ep, req, -ECONNABORTED); 2032 return; 2033 2034 case DD_STATUS_STS_BS: 2035 /* Interrupt only fires on EOT - This shouldn't happen! */ 2036 ep->req_pending = 0; 2037 ep_err(ep, "DMA critical EP error: EOT prior to service completion (0x%x)!\n", 2038 status); 2039 done(ep, req, -ECONNABORTED); 2040 return; 2041 2042 case DD_STATUS_STS_NC: 2043 case DD_STATUS_STS_DUR: 2044 /* Really just a short packet, not an underrun */ 2045 /* This is a good status and what we expect */ 2046 break; 2047 2048 default: 2049 /* Data overrun, system error, or unknown */ 2050 ep->req_pending = 0; 2051 ep_err(ep, "DMA critical EP error: System error (0x%x)!\n", 2052 status); 2053 done(ep, req, -ECONNABORTED); 2054 return; 2055 } 2056 2057 /* ISO endpoints are handled differently */ 2058 if (ep->eptype == EP_ISO_TYPE) { 2059 if (ep->is_in) 2060 req->req.actual = req->req.length; 2061 else 2062 req->req.actual = dd->iso_status[0] & 0xFFFF; 2063 } else 2064 req->req.actual += DD_STATUS_CURDMACNT(status); 2065 2066 /* Send a ZLP if necessary. This will be done for non-int 2067 * packets which have a size that is a divisor of MAXP */ 2068 if (req->send_zlp) { 2069 /* 2070 * If at least 1 buffer is available, send the ZLP now. 2071 * Otherwise, the ZLP send needs to be deferred until a 2072 * buffer is available. 2073 */ 2074 if (udc_clearep_getsts(udc, ep->hwep_num) & EP_SEL_F) { 2075 udc_clearep_getsts(udc, ep->hwep_num); 2076 uda_enable_hwepint(udc, ep->hwep_num); 2077 udc_clearep_getsts(udc, ep->hwep_num); 2078 2079 /* Let the EP interrupt handle the ZLP */ 2080 return; 2081 } else 2082 udc_send_in_zlp(udc, ep); 2083 } 2084 2085 /* Transfer request is complete */ 2086 done(ep, req, 0); 2087 2088 /* Start another request if ready */ 2089 udc_clearep_getsts(udc, ep->hwep_num); 2090 if (!list_empty((&ep->queue))) { 2091 if (ep->is_in) 2092 udc_ep_in_req_dma(udc, ep); 2093 else 2094 udc_ep_out_req_dma(udc, ep); 2095 } else 2096 ep->req_pending = 0; 2097 2098 } 2099 2100 /* 2101 * 2102 * Endpoint 0 functions 2103 * 2104 */ 2105 static void udc_handle_dev(struct lpc32xx_udc *udc) 2106 { 2107 u32 tmp; 2108 2109 udc_protocol_cmd_w(udc, CMD_GET_DEV_STAT); 2110 tmp = udc_protocol_cmd_r(udc, DAT_GET_DEV_STAT); 2111 2112 if (tmp & DEV_RST) 2113 uda_usb_reset(udc); 2114 else if (tmp & DEV_CON_CH) 2115 uda_power_event(udc, (tmp & DEV_CON)); 2116 else if (tmp & DEV_SUS_CH) { 2117 if (tmp & DEV_SUS) { 2118 if (udc->vbus == 0) 2119 stop_activity(udc); 2120 else if ((udc->gadget.speed != USB_SPEED_UNKNOWN) && 2121 udc->driver) { 2122 /* Power down transceiver */ 2123 udc->poweron = 0; 2124 schedule_work(&udc->pullup_job); 2125 uda_resm_susp_event(udc, 1); 2126 } 2127 } else if ((udc->gadget.speed != USB_SPEED_UNKNOWN) && 2128 udc->driver && udc->vbus) { 2129 uda_resm_susp_event(udc, 0); 2130 /* Power up transceiver */ 2131 udc->poweron = 1; 2132 schedule_work(&udc->pullup_job); 2133 } 2134 } 2135 } 2136 2137 static int udc_get_status(struct lpc32xx_udc *udc, u16 reqtype, u16 wIndex) 2138 { 2139 struct lpc32xx_ep *ep; 2140 u32 ep0buff = 0, tmp; 2141 2142 switch (reqtype & USB_RECIP_MASK) { 2143 case USB_RECIP_INTERFACE: 2144 break; /* Not supported */ 2145 2146 case USB_RECIP_DEVICE: 2147 ep0buff = udc->gadget.is_selfpowered; 2148 if (udc->dev_status & (1 << USB_DEVICE_REMOTE_WAKEUP)) 2149 ep0buff |= (1 << USB_DEVICE_REMOTE_WAKEUP); 2150 break; 2151 2152 case USB_RECIP_ENDPOINT: 2153 tmp = wIndex & USB_ENDPOINT_NUMBER_MASK; 2154 ep = &udc->ep[tmp]; 2155 if ((tmp == 0) || (tmp >= NUM_ENDPOINTS)) 2156 return -EOPNOTSUPP; 2157 2158 if (wIndex & USB_DIR_IN) { 2159 if (!ep->is_in) 2160 return -EOPNOTSUPP; /* Something's wrong */ 2161 } else if (ep->is_in) 2162 return -EOPNOTSUPP; /* Not an IN endpoint */ 2163 2164 /* Get status of the endpoint */ 2165 udc_protocol_cmd_w(udc, CMD_SEL_EP(ep->hwep_num)); 2166 tmp = udc_protocol_cmd_r(udc, DAT_SEL_EP(ep->hwep_num)); 2167 2168 if (tmp & EP_SEL_ST) 2169 ep0buff = (1 << USB_ENDPOINT_HALT); 2170 else 2171 ep0buff = 0; 2172 break; 2173 2174 default: 2175 break; 2176 } 2177 2178 /* Return data */ 2179 udc_write_hwep(udc, EP_IN, &ep0buff, 2); 2180 2181 return 0; 2182 } 2183 2184 static void udc_handle_ep0_setup(struct lpc32xx_udc *udc) 2185 { 2186 struct lpc32xx_ep *ep, *ep0 = &udc->ep[0]; 2187 struct usb_ctrlrequest ctrlpkt; 2188 int i, bytes; 2189 u16 wIndex, wValue, reqtype, req, tmp; 2190 2191 /* Nuke previous transfers */ 2192 nuke(ep0, -EPROTO); 2193 2194 /* Get setup packet */ 2195 bytes = udc_read_hwep(udc, EP_OUT, (u32 *) &ctrlpkt, 8); 2196 if (bytes != 8) { 2197 ep_warn(ep0, "Incorrectly sized setup packet (s/b 8, is %d)!\n", 2198 bytes); 2199 return; 2200 } 2201 2202 /* Native endianness */ 2203 wIndex = le16_to_cpu(ctrlpkt.wIndex); 2204 wValue = le16_to_cpu(ctrlpkt.wValue); 2205 reqtype = le16_to_cpu(ctrlpkt.bRequestType); 2206 2207 /* Set direction of EP0 */ 2208 if (likely(reqtype & USB_DIR_IN)) 2209 ep0->is_in = 1; 2210 else 2211 ep0->is_in = 0; 2212 2213 /* Handle SETUP packet */ 2214 req = le16_to_cpu(ctrlpkt.bRequest); 2215 switch (req) { 2216 case USB_REQ_CLEAR_FEATURE: 2217 case USB_REQ_SET_FEATURE: 2218 switch (reqtype) { 2219 case (USB_TYPE_STANDARD | USB_RECIP_DEVICE): 2220 if (wValue != USB_DEVICE_REMOTE_WAKEUP) 2221 goto stall; /* Nothing else handled */ 2222 2223 /* Tell board about event */ 2224 if (req == USB_REQ_CLEAR_FEATURE) 2225 udc->dev_status &= 2226 ~(1 << USB_DEVICE_REMOTE_WAKEUP); 2227 else 2228 udc->dev_status |= 2229 (1 << USB_DEVICE_REMOTE_WAKEUP); 2230 uda_remwkp_cgh(udc); 2231 goto zlp_send; 2232 2233 case (USB_TYPE_STANDARD | USB_RECIP_ENDPOINT): 2234 tmp = wIndex & USB_ENDPOINT_NUMBER_MASK; 2235 if ((wValue != USB_ENDPOINT_HALT) || 2236 (tmp >= NUM_ENDPOINTS)) 2237 break; 2238 2239 /* Find hardware endpoint from logical endpoint */ 2240 ep = &udc->ep[tmp]; 2241 tmp = ep->hwep_num; 2242 if (tmp == 0) 2243 break; 2244 2245 if (req == USB_REQ_SET_FEATURE) 2246 udc_stall_hwep(udc, tmp); 2247 else if (!ep->wedge) 2248 udc_clrstall_hwep(udc, tmp); 2249 2250 goto zlp_send; 2251 2252 default: 2253 break; 2254 } 2255 break; 2256 2257 case USB_REQ_SET_ADDRESS: 2258 if (reqtype == (USB_TYPE_STANDARD | USB_RECIP_DEVICE)) { 2259 udc_set_address(udc, wValue); 2260 goto zlp_send; 2261 } 2262 break; 2263 2264 case USB_REQ_GET_STATUS: 2265 udc_get_status(udc, reqtype, wIndex); 2266 return; 2267 2268 default: 2269 break; /* Let GadgetFS handle the descriptor instead */ 2270 } 2271 2272 if (likely(udc->driver)) { 2273 /* device-2-host (IN) or no data setup command, process 2274 * immediately */ 2275 spin_unlock(&udc->lock); 2276 i = udc->driver->setup(&udc->gadget, &ctrlpkt); 2277 2278 spin_lock(&udc->lock); 2279 if (req == USB_REQ_SET_CONFIGURATION) { 2280 /* Configuration is set after endpoints are realized */ 2281 if (wValue) { 2282 /* Set configuration */ 2283 udc_set_device_configured(udc); 2284 2285 udc_protocol_cmd_data_w(udc, CMD_SET_MODE, 2286 DAT_WR_BYTE(AP_CLK | 2287 INAK_BI | INAK_II)); 2288 } else { 2289 /* Clear configuration */ 2290 udc_set_device_unconfigured(udc); 2291 2292 /* Disable NAK interrupts */ 2293 udc_protocol_cmd_data_w(udc, CMD_SET_MODE, 2294 DAT_WR_BYTE(AP_CLK)); 2295 } 2296 } 2297 2298 if (i < 0) { 2299 /* setup processing failed, force stall */ 2300 dev_dbg(udc->dev, 2301 "req %02x.%02x protocol STALL; stat %d\n", 2302 reqtype, req, i); 2303 udc->ep0state = WAIT_FOR_SETUP; 2304 goto stall; 2305 } 2306 } 2307 2308 if (!ep0->is_in) 2309 udc_ep0_send_zlp(udc); /* ZLP IN packet on data phase */ 2310 2311 return; 2312 2313 stall: 2314 udc_stall_hwep(udc, EP_IN); 2315 return; 2316 2317 zlp_send: 2318 udc_ep0_send_zlp(udc); 2319 return; 2320 } 2321 2322 /* IN endpoint 0 transfer */ 2323 static void udc_handle_ep0_in(struct lpc32xx_udc *udc) 2324 { 2325 struct lpc32xx_ep *ep0 = &udc->ep[0]; 2326 u32 epstatus; 2327 2328 /* Clear EP interrupt */ 2329 epstatus = udc_clearep_getsts(udc, EP_IN); 2330 2331 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 2332 ep0->totalints++; 2333 #endif 2334 2335 /* Stalled? Clear stall and reset buffers */ 2336 if (epstatus & EP_SEL_ST) { 2337 udc_clrstall_hwep(udc, EP_IN); 2338 nuke(ep0, -ECONNABORTED); 2339 udc->ep0state = WAIT_FOR_SETUP; 2340 return; 2341 } 2342 2343 /* Is a buffer available? */ 2344 if (!(epstatus & EP_SEL_F)) { 2345 /* Handle based on current state */ 2346 if (udc->ep0state == DATA_IN) 2347 udc_ep0_in_req(udc); 2348 else { 2349 /* Unknown state for EP0 oe end of DATA IN phase */ 2350 nuke(ep0, -ECONNABORTED); 2351 udc->ep0state = WAIT_FOR_SETUP; 2352 } 2353 } 2354 } 2355 2356 /* OUT endpoint 0 transfer */ 2357 static void udc_handle_ep0_out(struct lpc32xx_udc *udc) 2358 { 2359 struct lpc32xx_ep *ep0 = &udc->ep[0]; 2360 u32 epstatus; 2361 2362 /* Clear EP interrupt */ 2363 epstatus = udc_clearep_getsts(udc, EP_OUT); 2364 2365 2366 #ifdef CONFIG_USB_GADGET_DEBUG_FILES 2367 ep0->totalints++; 2368 #endif 2369 2370 /* Stalled? */ 2371 if (epstatus & EP_SEL_ST) { 2372 udc_clrstall_hwep(udc, EP_OUT); 2373 nuke(ep0, -ECONNABORTED); 2374 udc->ep0state = WAIT_FOR_SETUP; 2375 return; 2376 } 2377 2378 /* A NAK may occur if a packet couldn't be received yet */ 2379 if (epstatus & EP_SEL_EPN) 2380 return; 2381 /* Setup packet incoming? */ 2382 if (epstatus & EP_SEL_STP) { 2383 nuke(ep0, 0); 2384 udc->ep0state = WAIT_FOR_SETUP; 2385 } 2386 2387 /* Data available? */ 2388 if (epstatus & EP_SEL_F) 2389 /* Handle based on current state */ 2390 switch (udc->ep0state) { 2391 case WAIT_FOR_SETUP: 2392 udc_handle_ep0_setup(udc); 2393 break; 2394 2395 case DATA_OUT: 2396 udc_ep0_out_req(udc); 2397 break; 2398 2399 default: 2400 /* Unknown state for EP0 */ 2401 nuke(ep0, -ECONNABORTED); 2402 udc->ep0state = WAIT_FOR_SETUP; 2403 } 2404 } 2405 2406 /* Must be called without lock */ 2407 static int lpc32xx_get_frame(struct usb_gadget *gadget) 2408 { 2409 int frame; 2410 unsigned long flags; 2411 struct lpc32xx_udc *udc = to_udc(gadget); 2412 2413 if (!udc->clocked) 2414 return -EINVAL; 2415 2416 spin_lock_irqsave(&udc->lock, flags); 2417 2418 frame = (int) udc_get_current_frame(udc); 2419 2420 spin_unlock_irqrestore(&udc->lock, flags); 2421 2422 return frame; 2423 } 2424 2425 static int lpc32xx_wakeup(struct usb_gadget *gadget) 2426 { 2427 return -ENOTSUPP; 2428 } 2429 2430 static int lpc32xx_set_selfpowered(struct usb_gadget *gadget, int is_on) 2431 { 2432 gadget->is_selfpowered = (is_on != 0); 2433 2434 return 0; 2435 } 2436 2437 /* 2438 * vbus is here! turn everything on that's ready 2439 * Must be called without lock 2440 */ 2441 static int lpc32xx_vbus_session(struct usb_gadget *gadget, int is_active) 2442 { 2443 unsigned long flags; 2444 struct lpc32xx_udc *udc = to_udc(gadget); 2445 2446 spin_lock_irqsave(&udc->lock, flags); 2447 2448 /* Doesn't need lock */ 2449 if (udc->driver) { 2450 udc_clk_set(udc, 1); 2451 udc_enable(udc); 2452 pullup(udc, is_active); 2453 } else { 2454 stop_activity(udc); 2455 pullup(udc, 0); 2456 2457 spin_unlock_irqrestore(&udc->lock, flags); 2458 /* 2459 * Wait for all the endpoints to disable, 2460 * before disabling clocks. Don't wait if 2461 * endpoints are not enabled. 2462 */ 2463 if (atomic_read(&udc->enabled_ep_cnt)) 2464 wait_event_interruptible(udc->ep_disable_wait_queue, 2465 (atomic_read(&udc->enabled_ep_cnt) == 0)); 2466 2467 spin_lock_irqsave(&udc->lock, flags); 2468 2469 udc_clk_set(udc, 0); 2470 } 2471 2472 spin_unlock_irqrestore(&udc->lock, flags); 2473 2474 return 0; 2475 } 2476 2477 /* Can be called with or without lock */ 2478 static int lpc32xx_pullup(struct usb_gadget *gadget, int is_on) 2479 { 2480 struct lpc32xx_udc *udc = to_udc(gadget); 2481 2482 /* Doesn't need lock */ 2483 pullup(udc, is_on); 2484 2485 return 0; 2486 } 2487 2488 static int lpc32xx_start(struct usb_gadget *, struct usb_gadget_driver *); 2489 static int lpc32xx_stop(struct usb_gadget *); 2490 2491 static const struct usb_gadget_ops lpc32xx_udc_ops = { 2492 .get_frame = lpc32xx_get_frame, 2493 .wakeup = lpc32xx_wakeup, 2494 .set_selfpowered = lpc32xx_set_selfpowered, 2495 .vbus_session = lpc32xx_vbus_session, 2496 .pullup = lpc32xx_pullup, 2497 .udc_start = lpc32xx_start, 2498 .udc_stop = lpc32xx_stop, 2499 }; 2500 2501 static void nop_release(struct device *dev) 2502 { 2503 /* nothing to free */ 2504 } 2505 2506 static const struct lpc32xx_udc controller_template = { 2507 .gadget = { 2508 .ops = &lpc32xx_udc_ops, 2509 .name = driver_name, 2510 .dev = { 2511 .init_name = "gadget", 2512 .release = nop_release, 2513 } 2514 }, 2515 .ep[0] = { 2516 .ep = { 2517 .name = "ep0", 2518 .ops = &lpc32xx_ep_ops, 2519 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL, 2520 USB_EP_CAPS_DIR_ALL), 2521 }, 2522 .maxpacket = 64, 2523 .hwep_num_base = 0, 2524 .hwep_num = 0, /* Can be 0 or 1, has special handling */ 2525 .lep = 0, 2526 .eptype = EP_CTL_TYPE, 2527 }, 2528 .ep[1] = { 2529 .ep = { 2530 .name = "ep1-int", 2531 .ops = &lpc32xx_ep_ops, 2532 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, 2533 USB_EP_CAPS_DIR_ALL), 2534 }, 2535 .maxpacket = 64, 2536 .hwep_num_base = 2, 2537 .hwep_num = 0, /* 2 or 3, will be set later */ 2538 .lep = 1, 2539 .eptype = EP_INT_TYPE, 2540 }, 2541 .ep[2] = { 2542 .ep = { 2543 .name = "ep2-bulk", 2544 .ops = &lpc32xx_ep_ops, 2545 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2546 USB_EP_CAPS_DIR_ALL), 2547 }, 2548 .maxpacket = 64, 2549 .hwep_num_base = 4, 2550 .hwep_num = 0, /* 4 or 5, will be set later */ 2551 .lep = 2, 2552 .eptype = EP_BLK_TYPE, 2553 }, 2554 .ep[3] = { 2555 .ep = { 2556 .name = "ep3-iso", 2557 .ops = &lpc32xx_ep_ops, 2558 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, 2559 USB_EP_CAPS_DIR_ALL), 2560 }, 2561 .maxpacket = 1023, 2562 .hwep_num_base = 6, 2563 .hwep_num = 0, /* 6 or 7, will be set later */ 2564 .lep = 3, 2565 .eptype = EP_ISO_TYPE, 2566 }, 2567 .ep[4] = { 2568 .ep = { 2569 .name = "ep4-int", 2570 .ops = &lpc32xx_ep_ops, 2571 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, 2572 USB_EP_CAPS_DIR_ALL), 2573 }, 2574 .maxpacket = 64, 2575 .hwep_num_base = 8, 2576 .hwep_num = 0, /* 8 or 9, will be set later */ 2577 .lep = 4, 2578 .eptype = EP_INT_TYPE, 2579 }, 2580 .ep[5] = { 2581 .ep = { 2582 .name = "ep5-bulk", 2583 .ops = &lpc32xx_ep_ops, 2584 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2585 USB_EP_CAPS_DIR_ALL), 2586 }, 2587 .maxpacket = 64, 2588 .hwep_num_base = 10, 2589 .hwep_num = 0, /* 10 or 11, will be set later */ 2590 .lep = 5, 2591 .eptype = EP_BLK_TYPE, 2592 }, 2593 .ep[6] = { 2594 .ep = { 2595 .name = "ep6-iso", 2596 .ops = &lpc32xx_ep_ops, 2597 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, 2598 USB_EP_CAPS_DIR_ALL), 2599 }, 2600 .maxpacket = 1023, 2601 .hwep_num_base = 12, 2602 .hwep_num = 0, /* 12 or 13, will be set later */ 2603 .lep = 6, 2604 .eptype = EP_ISO_TYPE, 2605 }, 2606 .ep[7] = { 2607 .ep = { 2608 .name = "ep7-int", 2609 .ops = &lpc32xx_ep_ops, 2610 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, 2611 USB_EP_CAPS_DIR_ALL), 2612 }, 2613 .maxpacket = 64, 2614 .hwep_num_base = 14, 2615 .hwep_num = 0, 2616 .lep = 7, 2617 .eptype = EP_INT_TYPE, 2618 }, 2619 .ep[8] = { 2620 .ep = { 2621 .name = "ep8-bulk", 2622 .ops = &lpc32xx_ep_ops, 2623 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2624 USB_EP_CAPS_DIR_ALL), 2625 }, 2626 .maxpacket = 64, 2627 .hwep_num_base = 16, 2628 .hwep_num = 0, 2629 .lep = 8, 2630 .eptype = EP_BLK_TYPE, 2631 }, 2632 .ep[9] = { 2633 .ep = { 2634 .name = "ep9-iso", 2635 .ops = &lpc32xx_ep_ops, 2636 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, 2637 USB_EP_CAPS_DIR_ALL), 2638 }, 2639 .maxpacket = 1023, 2640 .hwep_num_base = 18, 2641 .hwep_num = 0, 2642 .lep = 9, 2643 .eptype = EP_ISO_TYPE, 2644 }, 2645 .ep[10] = { 2646 .ep = { 2647 .name = "ep10-int", 2648 .ops = &lpc32xx_ep_ops, 2649 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, 2650 USB_EP_CAPS_DIR_ALL), 2651 }, 2652 .maxpacket = 64, 2653 .hwep_num_base = 20, 2654 .hwep_num = 0, 2655 .lep = 10, 2656 .eptype = EP_INT_TYPE, 2657 }, 2658 .ep[11] = { 2659 .ep = { 2660 .name = "ep11-bulk", 2661 .ops = &lpc32xx_ep_ops, 2662 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2663 USB_EP_CAPS_DIR_ALL), 2664 }, 2665 .maxpacket = 64, 2666 .hwep_num_base = 22, 2667 .hwep_num = 0, 2668 .lep = 11, 2669 .eptype = EP_BLK_TYPE, 2670 }, 2671 .ep[12] = { 2672 .ep = { 2673 .name = "ep12-iso", 2674 .ops = &lpc32xx_ep_ops, 2675 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_ISO, 2676 USB_EP_CAPS_DIR_ALL), 2677 }, 2678 .maxpacket = 1023, 2679 .hwep_num_base = 24, 2680 .hwep_num = 0, 2681 .lep = 12, 2682 .eptype = EP_ISO_TYPE, 2683 }, 2684 .ep[13] = { 2685 .ep = { 2686 .name = "ep13-int", 2687 .ops = &lpc32xx_ep_ops, 2688 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_INT, 2689 USB_EP_CAPS_DIR_ALL), 2690 }, 2691 .maxpacket = 64, 2692 .hwep_num_base = 26, 2693 .hwep_num = 0, 2694 .lep = 13, 2695 .eptype = EP_INT_TYPE, 2696 }, 2697 .ep[14] = { 2698 .ep = { 2699 .name = "ep14-bulk", 2700 .ops = &lpc32xx_ep_ops, 2701 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2702 USB_EP_CAPS_DIR_ALL), 2703 }, 2704 .maxpacket = 64, 2705 .hwep_num_base = 28, 2706 .hwep_num = 0, 2707 .lep = 14, 2708 .eptype = EP_BLK_TYPE, 2709 }, 2710 .ep[15] = { 2711 .ep = { 2712 .name = "ep15-bulk", 2713 .ops = &lpc32xx_ep_ops, 2714 .caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK, 2715 USB_EP_CAPS_DIR_ALL), 2716 }, 2717 .maxpacket = 1023, 2718 .hwep_num_base = 30, 2719 .hwep_num = 0, 2720 .lep = 15, 2721 .eptype = EP_BLK_TYPE, 2722 }, 2723 }; 2724 2725 /* ISO and status interrupts */ 2726 static irqreturn_t lpc32xx_usb_lp_irq(int irq, void *_udc) 2727 { 2728 u32 tmp, devstat; 2729 struct lpc32xx_udc *udc = _udc; 2730 2731 spin_lock(&udc->lock); 2732 2733 /* Read the device status register */ 2734 devstat = readl(USBD_DEVINTST(udc->udp_baseaddr)); 2735 2736 devstat &= ~USBD_EP_FAST; 2737 writel(devstat, USBD_DEVINTCLR(udc->udp_baseaddr)); 2738 devstat = devstat & udc->enabled_devints; 2739 2740 /* Device specific handling needed? */ 2741 if (devstat & USBD_DEV_STAT) 2742 udc_handle_dev(udc); 2743 2744 /* Start of frame? (devstat & FRAME_INT): 2745 * The frame interrupt isn't really needed for ISO support, 2746 * as the driver will queue the necessary packets */ 2747 2748 /* Error? */ 2749 if (devstat & ERR_INT) { 2750 /* All types of errors, from cable removal during transfer to 2751 * misc protocol and bit errors. These are mostly for just info, 2752 * as the USB hardware will work around these. If these errors 2753 * happen alot, something is wrong. */ 2754 udc_protocol_cmd_w(udc, CMD_RD_ERR_STAT); 2755 tmp = udc_protocol_cmd_r(udc, DAT_RD_ERR_STAT); 2756 dev_dbg(udc->dev, "Device error (0x%x)!\n", tmp); 2757 } 2758 2759 spin_unlock(&udc->lock); 2760 2761 return IRQ_HANDLED; 2762 } 2763 2764 /* EP interrupts */ 2765 static irqreturn_t lpc32xx_usb_hp_irq(int irq, void *_udc) 2766 { 2767 u32 tmp; 2768 struct lpc32xx_udc *udc = _udc; 2769 2770 spin_lock(&udc->lock); 2771 2772 /* Read the device status register */ 2773 writel(USBD_EP_FAST, USBD_DEVINTCLR(udc->udp_baseaddr)); 2774 2775 /* Endpoints */ 2776 tmp = readl(USBD_EPINTST(udc->udp_baseaddr)); 2777 2778 /* Special handling for EP0 */ 2779 if (tmp & (EP_MASK_SEL(0, EP_OUT) | EP_MASK_SEL(0, EP_IN))) { 2780 /* Handle EP0 IN */ 2781 if (tmp & (EP_MASK_SEL(0, EP_IN))) 2782 udc_handle_ep0_in(udc); 2783 2784 /* Handle EP0 OUT */ 2785 if (tmp & (EP_MASK_SEL(0, EP_OUT))) 2786 udc_handle_ep0_out(udc); 2787 } 2788 2789 /* All other EPs */ 2790 if (tmp & ~(EP_MASK_SEL(0, EP_OUT) | EP_MASK_SEL(0, EP_IN))) { 2791 int i; 2792 2793 /* Handle other EP interrupts */ 2794 for (i = 1; i < NUM_ENDPOINTS; i++) { 2795 if (tmp & (1 << udc->ep[i].hwep_num)) 2796 udc_handle_eps(udc, &udc->ep[i]); 2797 } 2798 } 2799 2800 spin_unlock(&udc->lock); 2801 2802 return IRQ_HANDLED; 2803 } 2804 2805 static irqreturn_t lpc32xx_usb_devdma_irq(int irq, void *_udc) 2806 { 2807 struct lpc32xx_udc *udc = _udc; 2808 2809 int i; 2810 u32 tmp; 2811 2812 spin_lock(&udc->lock); 2813 2814 /* Handle EP DMA EOT interrupts */ 2815 tmp = readl(USBD_EOTINTST(udc->udp_baseaddr)) | 2816 (readl(USBD_EPDMAST(udc->udp_baseaddr)) & 2817 readl(USBD_NDDRTINTST(udc->udp_baseaddr))) | 2818 readl(USBD_SYSERRTINTST(udc->udp_baseaddr)); 2819 for (i = 1; i < NUM_ENDPOINTS; i++) { 2820 if (tmp & (1 << udc->ep[i].hwep_num)) 2821 udc_handle_dma_ep(udc, &udc->ep[i]); 2822 } 2823 2824 spin_unlock(&udc->lock); 2825 2826 return IRQ_HANDLED; 2827 } 2828 2829 /* 2830 * 2831 * VBUS detection, pullup handler, and Gadget cable state notification 2832 * 2833 */ 2834 static void vbus_work(struct lpc32xx_udc *udc) 2835 { 2836 u8 value; 2837 2838 if (udc->enabled != 0) { 2839 /* Discharge VBUS real quick */ 2840 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2841 ISP1301_I2C_OTG_CONTROL_1, OTG1_VBUS_DISCHRG); 2842 2843 /* Give VBUS some time (100mS) to discharge */ 2844 msleep(100); 2845 2846 /* Disable VBUS discharge resistor */ 2847 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2848 ISP1301_I2C_OTG_CONTROL_1 | ISP1301_I2C_REG_CLEAR_ADDR, 2849 OTG1_VBUS_DISCHRG); 2850 2851 /* Clear interrupt */ 2852 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2853 ISP1301_I2C_INTERRUPT_LATCH | 2854 ISP1301_I2C_REG_CLEAR_ADDR, ~0); 2855 2856 /* Get the VBUS status from the transceiver */ 2857 value = i2c_smbus_read_byte_data(udc->isp1301_i2c_client, 2858 ISP1301_I2C_INTERRUPT_SOURCE); 2859 2860 /* VBUS on or off? */ 2861 if (value & INT_SESS_VLD) 2862 udc->vbus = 1; 2863 else 2864 udc->vbus = 0; 2865 2866 /* VBUS changed? */ 2867 if (udc->last_vbus != udc->vbus) { 2868 udc->last_vbus = udc->vbus; 2869 lpc32xx_vbus_session(&udc->gadget, udc->vbus); 2870 } 2871 } 2872 } 2873 2874 static irqreturn_t lpc32xx_usb_vbus_irq(int irq, void *_udc) 2875 { 2876 struct lpc32xx_udc *udc = _udc; 2877 2878 vbus_work(udc); 2879 2880 return IRQ_HANDLED; 2881 } 2882 2883 static int lpc32xx_start(struct usb_gadget *gadget, 2884 struct usb_gadget_driver *driver) 2885 { 2886 struct lpc32xx_udc *udc = to_udc(gadget); 2887 2888 if (!driver || driver->max_speed < USB_SPEED_FULL || !driver->setup) { 2889 dev_err(udc->dev, "bad parameter.\n"); 2890 return -EINVAL; 2891 } 2892 2893 if (udc->driver) { 2894 dev_err(udc->dev, "UDC already has a gadget driver\n"); 2895 return -EBUSY; 2896 } 2897 2898 udc->driver = driver; 2899 udc->gadget.dev.of_node = udc->dev->of_node; 2900 udc->enabled = 1; 2901 udc->gadget.is_selfpowered = 1; 2902 udc->vbus = 0; 2903 2904 /* Force VBUS process once to check for cable insertion */ 2905 udc->last_vbus = udc->vbus = 0; 2906 vbus_work(udc); 2907 2908 /* enable interrupts */ 2909 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2910 ISP1301_I2C_INTERRUPT_FALLING, INT_SESS_VLD | INT_VBUS_VLD); 2911 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2912 ISP1301_I2C_INTERRUPT_RISING, INT_SESS_VLD | INT_VBUS_VLD); 2913 2914 return 0; 2915 } 2916 2917 static int lpc32xx_stop(struct usb_gadget *gadget) 2918 { 2919 struct lpc32xx_udc *udc = to_udc(gadget); 2920 2921 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2922 ISP1301_I2C_INTERRUPT_FALLING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); 2923 i2c_smbus_write_byte_data(udc->isp1301_i2c_client, 2924 ISP1301_I2C_INTERRUPT_RISING | ISP1301_I2C_REG_CLEAR_ADDR, ~0); 2925 2926 if (udc->clocked) { 2927 spin_lock(&udc->lock); 2928 stop_activity(udc); 2929 spin_unlock(&udc->lock); 2930 2931 /* 2932 * Wait for all the endpoints to disable, 2933 * before disabling clocks. Don't wait if 2934 * endpoints are not enabled. 2935 */ 2936 if (atomic_read(&udc->enabled_ep_cnt)) 2937 wait_event_interruptible(udc->ep_disable_wait_queue, 2938 (atomic_read(&udc->enabled_ep_cnt) == 0)); 2939 2940 spin_lock(&udc->lock); 2941 udc_clk_set(udc, 0); 2942 spin_unlock(&udc->lock); 2943 } 2944 2945 udc->enabled = 0; 2946 udc->driver = NULL; 2947 2948 return 0; 2949 } 2950 2951 static void lpc32xx_udc_shutdown(struct platform_device *dev) 2952 { 2953 /* Force disconnect on reboot */ 2954 struct lpc32xx_udc *udc = platform_get_drvdata(dev); 2955 2956 pullup(udc, 0); 2957 } 2958 2959 /* 2960 * Callbacks to be overridden by options passed via OF (TODO) 2961 */ 2962 2963 static void lpc32xx_usbd_conn_chg(int conn) 2964 { 2965 /* Do nothing, it might be nice to enable an LED 2966 * based on conn state being !0 */ 2967 } 2968 2969 static void lpc32xx_usbd_susp_chg(int susp) 2970 { 2971 /* Device suspend if susp != 0 */ 2972 } 2973 2974 static void lpc32xx_rmwkup_chg(int remote_wakup_enable) 2975 { 2976 /* Enable or disable USB remote wakeup */ 2977 } 2978 2979 static struct lpc32xx_usbd_cfg lpc32xx_usbddata = { 2980 .vbus_drv_pol = 0, 2981 .conn_chgb = &lpc32xx_usbd_conn_chg, 2982 .susp_chgb = &lpc32xx_usbd_susp_chg, 2983 .rmwk_chgb = &lpc32xx_rmwkup_chg, 2984 }; 2985 2986 2987 static u64 lpc32xx_usbd_dmamask = ~(u32) 0x7F; 2988 2989 static int lpc32xx_udc_probe(struct platform_device *pdev) 2990 { 2991 struct device *dev = &pdev->dev; 2992 struct lpc32xx_udc *udc; 2993 int retval, i; 2994 dma_addr_t dma_handle; 2995 struct device_node *isp1301_node; 2996 2997 udc = devm_kmemdup(dev, &controller_template, sizeof(*udc), GFP_KERNEL); 2998 if (!udc) 2999 return -ENOMEM; 3000 3001 for (i = 0; i <= 15; i++) 3002 udc->ep[i].udc = udc; 3003 udc->gadget.ep0 = &udc->ep[0].ep; 3004 3005 /* init software state */ 3006 udc->gadget.dev.parent = dev; 3007 udc->pdev = pdev; 3008 udc->dev = &pdev->dev; 3009 udc->enabled = 0; 3010 3011 if (pdev->dev.of_node) { 3012 isp1301_node = of_parse_phandle(pdev->dev.of_node, 3013 "transceiver", 0); 3014 } else { 3015 isp1301_node = NULL; 3016 } 3017 3018 udc->isp1301_i2c_client = isp1301_get_client(isp1301_node); 3019 of_node_put(isp1301_node); 3020 if (!udc->isp1301_i2c_client) { 3021 return -EPROBE_DEFER; 3022 } 3023 3024 dev_info(udc->dev, "ISP1301 I2C device at address 0x%x\n", 3025 udc->isp1301_i2c_client->addr); 3026 3027 pdev->dev.dma_mask = &lpc32xx_usbd_dmamask; 3028 retval = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 3029 if (retval) 3030 return retval; 3031 3032 udc->board = &lpc32xx_usbddata; 3033 3034 /* 3035 * Resources are mapped as follows: 3036 * IORESOURCE_MEM, base address and size of USB space 3037 * IORESOURCE_IRQ, USB device low priority interrupt number 3038 * IORESOURCE_IRQ, USB device high priority interrupt number 3039 * IORESOURCE_IRQ, USB device interrupt number 3040 * IORESOURCE_IRQ, USB transceiver interrupt number 3041 */ 3042 3043 spin_lock_init(&udc->lock); 3044 3045 /* Get IRQs */ 3046 for (i = 0; i < 4; i++) { 3047 udc->udp_irq[i] = platform_get_irq(pdev, i); 3048 if (udc->udp_irq[i] < 0) 3049 return udc->udp_irq[i]; 3050 } 3051 3052 udc->udp_baseaddr = devm_platform_ioremap_resource(pdev, 0); 3053 if (IS_ERR(udc->udp_baseaddr)) { 3054 dev_err(udc->dev, "IO map failure\n"); 3055 return PTR_ERR(udc->udp_baseaddr); 3056 } 3057 3058 /* Get USB device clock */ 3059 udc->usb_slv_clk = devm_clk_get(&pdev->dev, NULL); 3060 if (IS_ERR(udc->usb_slv_clk)) { 3061 dev_err(udc->dev, "failed to acquire USB device clock\n"); 3062 return PTR_ERR(udc->usb_slv_clk); 3063 } 3064 3065 /* Enable USB device clock */ 3066 retval = clk_prepare_enable(udc->usb_slv_clk); 3067 if (retval < 0) { 3068 dev_err(udc->dev, "failed to start USB device clock\n"); 3069 return retval; 3070 } 3071 3072 /* Setup deferred workqueue data */ 3073 udc->poweron = udc->pullup = 0; 3074 INIT_WORK(&udc->pullup_job, pullup_work); 3075 #ifdef CONFIG_PM 3076 INIT_WORK(&udc->power_job, power_work); 3077 #endif 3078 3079 /* All clocks are now on */ 3080 udc->clocked = 1; 3081 3082 isp1301_udc_configure(udc); 3083 /* Allocate memory for the UDCA */ 3084 udc->udca_v_base = dma_alloc_coherent(&pdev->dev, UDCA_BUFF_SIZE, 3085 &dma_handle, 3086 (GFP_KERNEL | GFP_DMA)); 3087 if (!udc->udca_v_base) { 3088 dev_err(udc->dev, "error getting UDCA region\n"); 3089 retval = -ENOMEM; 3090 goto i2c_fail; 3091 } 3092 udc->udca_p_base = dma_handle; 3093 dev_dbg(udc->dev, "DMA buffer(0x%x bytes), P:0x%08x, V:0x%p\n", 3094 UDCA_BUFF_SIZE, udc->udca_p_base, udc->udca_v_base); 3095 3096 /* Setup the DD DMA memory pool */ 3097 udc->dd_cache = dma_pool_create("udc_dd", udc->dev, 3098 sizeof(struct lpc32xx_usbd_dd_gad), 3099 sizeof(u32), 0); 3100 if (!udc->dd_cache) { 3101 dev_err(udc->dev, "error getting DD DMA region\n"); 3102 retval = -ENOMEM; 3103 goto dma_alloc_fail; 3104 } 3105 3106 /* Clear USB peripheral and initialize gadget endpoints */ 3107 udc_disable(udc); 3108 udc_reinit(udc); 3109 3110 /* Request IRQs - low and high priority USB device IRQs are routed to 3111 * the same handler, while the DMA interrupt is routed elsewhere */ 3112 retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_LP], 3113 lpc32xx_usb_lp_irq, 0, "udc_lp", udc); 3114 if (retval < 0) { 3115 dev_err(udc->dev, "LP request irq %d failed\n", 3116 udc->udp_irq[IRQ_USB_LP]); 3117 goto irq_req_fail; 3118 } 3119 retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_HP], 3120 lpc32xx_usb_hp_irq, 0, "udc_hp", udc); 3121 if (retval < 0) { 3122 dev_err(udc->dev, "HP request irq %d failed\n", 3123 udc->udp_irq[IRQ_USB_HP]); 3124 goto irq_req_fail; 3125 } 3126 3127 retval = devm_request_irq(dev, udc->udp_irq[IRQ_USB_DEVDMA], 3128 lpc32xx_usb_devdma_irq, 0, "udc_dma", udc); 3129 if (retval < 0) { 3130 dev_err(udc->dev, "DEV request irq %d failed\n", 3131 udc->udp_irq[IRQ_USB_DEVDMA]); 3132 goto irq_req_fail; 3133 } 3134 3135 /* The transceiver interrupt is used for VBUS detection and will 3136 kick off the VBUS handler function */ 3137 retval = devm_request_threaded_irq(dev, udc->udp_irq[IRQ_USB_ATX], NULL, 3138 lpc32xx_usb_vbus_irq, IRQF_ONESHOT, 3139 "udc_otg", udc); 3140 if (retval < 0) { 3141 dev_err(udc->dev, "VBUS request irq %d failed\n", 3142 udc->udp_irq[IRQ_USB_ATX]); 3143 goto irq_req_fail; 3144 } 3145 3146 /* Initialize wait queue */ 3147 init_waitqueue_head(&udc->ep_disable_wait_queue); 3148 atomic_set(&udc->enabled_ep_cnt, 0); 3149 3150 retval = usb_add_gadget_udc(dev, &udc->gadget); 3151 if (retval < 0) 3152 goto add_gadget_fail; 3153 3154 dev_set_drvdata(dev, udc); 3155 device_init_wakeup(dev, 1); 3156 create_debug_file(udc); 3157 3158 /* Disable clocks for now */ 3159 udc_clk_set(udc, 0); 3160 3161 dev_info(udc->dev, "%s version %s\n", driver_name, DRIVER_VERSION); 3162 return 0; 3163 3164 add_gadget_fail: 3165 irq_req_fail: 3166 dma_pool_destroy(udc->dd_cache); 3167 dma_alloc_fail: 3168 dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE, 3169 udc->udca_v_base, udc->udca_p_base); 3170 i2c_fail: 3171 clk_disable_unprepare(udc->usb_slv_clk); 3172 dev_err(udc->dev, "%s probe failed, %d\n", driver_name, retval); 3173 3174 return retval; 3175 } 3176 3177 static void lpc32xx_udc_remove(struct platform_device *pdev) 3178 { 3179 struct lpc32xx_udc *udc = platform_get_drvdata(pdev); 3180 3181 usb_del_gadget_udc(&udc->gadget); 3182 if (udc->driver) { 3183 dev_err(&pdev->dev, 3184 "Driver still in use but removing anyhow\n"); 3185 return; 3186 } 3187 3188 udc_clk_set(udc, 1); 3189 udc_disable(udc); 3190 pullup(udc, 0); 3191 3192 device_init_wakeup(&pdev->dev, 0); 3193 remove_debug_file(udc); 3194 3195 dma_pool_destroy(udc->dd_cache); 3196 dma_free_coherent(&pdev->dev, UDCA_BUFF_SIZE, 3197 udc->udca_v_base, udc->udca_p_base); 3198 3199 clk_disable_unprepare(udc->usb_slv_clk); 3200 } 3201 3202 #ifdef CONFIG_PM 3203 static int lpc32xx_udc_suspend(struct platform_device *pdev, pm_message_t mesg) 3204 { 3205 struct lpc32xx_udc *udc = platform_get_drvdata(pdev); 3206 3207 if (udc->clocked) { 3208 /* Power down ISP */ 3209 udc->poweron = 0; 3210 isp1301_set_powerstate(udc, 0); 3211 3212 /* Disable clocking */ 3213 udc_clk_set(udc, 0); 3214 3215 /* Keep clock flag on, so we know to re-enable clocks 3216 on resume */ 3217 udc->clocked = 1; 3218 3219 /* Kill global USB clock */ 3220 clk_disable_unprepare(udc->usb_slv_clk); 3221 } 3222 3223 return 0; 3224 } 3225 3226 static int lpc32xx_udc_resume(struct platform_device *pdev) 3227 { 3228 struct lpc32xx_udc *udc = platform_get_drvdata(pdev); 3229 3230 if (udc->clocked) { 3231 /* Enable global USB clock */ 3232 clk_prepare_enable(udc->usb_slv_clk); 3233 3234 /* Enable clocking */ 3235 udc_clk_set(udc, 1); 3236 3237 /* ISP back to normal power mode */ 3238 udc->poweron = 1; 3239 isp1301_set_powerstate(udc, 1); 3240 } 3241 3242 return 0; 3243 } 3244 #else 3245 #define lpc32xx_udc_suspend NULL 3246 #define lpc32xx_udc_resume NULL 3247 #endif 3248 3249 #ifdef CONFIG_OF 3250 static const struct of_device_id lpc32xx_udc_of_match[] = { 3251 { .compatible = "nxp,lpc3220-udc", }, 3252 { }, 3253 }; 3254 MODULE_DEVICE_TABLE(of, lpc32xx_udc_of_match); 3255 #endif 3256 3257 static struct platform_driver lpc32xx_udc_driver = { 3258 .probe = lpc32xx_udc_probe, 3259 .remove_new = lpc32xx_udc_remove, 3260 .shutdown = lpc32xx_udc_shutdown, 3261 .suspend = lpc32xx_udc_suspend, 3262 .resume = lpc32xx_udc_resume, 3263 .driver = { 3264 .name = driver_name, 3265 .of_match_table = of_match_ptr(lpc32xx_udc_of_match), 3266 }, 3267 }; 3268 3269 module_platform_driver(lpc32xx_udc_driver); 3270 3271 MODULE_DESCRIPTION("LPC32XX udc driver"); 3272 MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com>"); 3273 MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); 3274 MODULE_LICENSE("GPL"); 3275 MODULE_ALIAS("platform:lpc32xx_udc"); 3276