1 /* 2 * (C) Copyright 2001 3 * Denis Peter, MPL AG Switzerland 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 * Note: Part of this code has been derived from linux 7 * 8 */ 9 #ifndef _USB_H_ 10 #define _USB_H_ 11 12 #include <usb_defs.h> 13 #include <linux/usb/ch9.h> 14 15 /* 16 * The EHCI spec says that we must align to at least 32 bytes. However, 17 * some platforms require larger alignment. 18 */ 19 #if ARCH_DMA_MINALIGN > 32 20 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN 21 #else 22 #define USB_DMA_MINALIGN 32 23 #endif 24 25 /* Everything is aribtrary */ 26 #define USB_ALTSETTINGALLOC 4 27 #define USB_MAXALTSETTING 128 /* Hard limit */ 28 29 #define USB_MAX_DEVICE 32 30 #define USB_MAXCONFIG 8 31 #define USB_MAXINTERFACES 8 32 #define USB_MAXENDPOINTS 16 33 #define USB_MAXCHILDREN 8 /* This is arbitrary */ 34 #define USB_MAX_HUB 16 35 36 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */ 37 38 /* 39 * This is the timeout to allow for submitting an urb in ms. We allow more 40 * time for a BULK device to react - some are slow. 41 */ 42 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000) 43 44 /* device request (setup) */ 45 struct devrequest { 46 unsigned char requesttype; 47 unsigned char request; 48 unsigned short value; 49 unsigned short index; 50 unsigned short length; 51 } __attribute__ ((packed)); 52 53 /* Interface */ 54 struct usb_interface { 55 struct usb_interface_descriptor desc; 56 57 unsigned char no_of_ep; 58 unsigned char num_altsetting; 59 unsigned char act_altsetting; 60 61 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS]; 62 /* 63 * Super Speed Device will have Super Speed Endpoint 64 * Companion Descriptor (section 9.6.7 of usb 3.0 spec) 65 * Revision 1.0 June 6th 2011 66 */ 67 struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS]; 68 } __attribute__ ((packed)); 69 70 /* Configuration information.. */ 71 struct usb_config { 72 struct usb_config_descriptor desc; 73 74 unsigned char no_of_if; /* number of interfaces */ 75 struct usb_interface if_desc[USB_MAXINTERFACES]; 76 } __attribute__ ((packed)); 77 78 enum { 79 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */ 80 PACKET_SIZE_8 = 0, 81 PACKET_SIZE_16 = 1, 82 PACKET_SIZE_32 = 2, 83 PACKET_SIZE_64 = 3, 84 }; 85 86 struct usb_device { 87 int devnum; /* Device number on USB bus */ 88 int speed; /* full/low/high */ 89 char mf[32]; /* manufacturer */ 90 char prod[32]; /* product */ 91 char serial[32]; /* serial number */ 92 93 /* Maximum packet size; one of: PACKET_SIZE_* */ 94 int maxpacketsize; 95 /* one bit for each endpoint ([0] = IN, [1] = OUT) */ 96 unsigned int toggle[2]; 97 /* endpoint halts; one bit per endpoint # & direction; 98 * [0] = IN, [1] = OUT 99 */ 100 unsigned int halted[2]; 101 int epmaxpacketin[16]; /* INput endpoint specific maximums */ 102 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */ 103 104 int configno; /* selected config number */ 105 /* Device Descriptor */ 106 struct usb_device_descriptor descriptor 107 __attribute__((aligned(ARCH_DMA_MINALIGN))); 108 struct usb_config config; /* config descriptor */ 109 110 int have_langid; /* whether string_langid is valid yet */ 111 int string_langid; /* language ID for strings */ 112 int (*irq_handle)(struct usb_device *dev); 113 unsigned long irq_status; 114 int irq_act_len; /* transfered bytes */ 115 void *privptr; 116 /* 117 * Child devices - if this is a hub device 118 * Each instance needs its own set of data structures. 119 */ 120 unsigned long status; 121 int act_len; /* transfered bytes */ 122 int maxchild; /* Number of ports if hub */ 123 int portnr; 124 struct usb_device *parent; 125 struct usb_device *children[USB_MAXCHILDREN]; 126 127 void *controller; /* hardware controller private data */ 128 }; 129 130 /********************************************************************** 131 * this is how the lowlevel part communicate with the outer world 132 */ 133 134 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \ 135 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \ 136 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \ 137 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \ 138 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \ 139 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \ 140 defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \ 141 defined(CONFIG_USB_MUSB_OMAP2PLUS) 142 143 int usb_lowlevel_init(int index, void **controller); 144 int usb_lowlevel_stop(int index); 145 146 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, 147 void *buffer, int transfer_len); 148 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 149 int transfer_len, struct devrequest *setup); 150 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 151 int transfer_len, int interval); 152 153 /* Defines */ 154 #define USB_UHCI_VEND_ID 0x8086 155 #define USB_UHCI_DEV_ID 0x7112 156 157 /* 158 * PXA25x can only act as USB device. There are drivers 159 * which works with USB CDC gadgets implementations. 160 * Some of them have common routines which can be used 161 * in boards init functions e.g. udc_disconnect() used for 162 * forced device disconnection from host. 163 */ 164 #elif defined(CONFIG_USB_GADGET_PXA2XX) 165 166 extern void udc_disconnect(void); 167 168 #else 169 #error USB Lowlevel not defined 170 #endif 171 172 #ifdef CONFIG_USB_STORAGE 173 174 #define USB_MAX_STOR_DEV 5 175 block_dev_desc_t *usb_stor_get_dev(int index); 176 int usb_stor_scan(int mode); 177 int usb_stor_info(void); 178 179 #endif 180 181 #ifdef CONFIG_USB_HOST_ETHER 182 183 #define USB_MAX_ETH_DEV 5 184 int usb_host_eth_scan(int mode); 185 186 #endif 187 188 #ifdef CONFIG_USB_KEYBOARD 189 190 int drv_usb_kbd_init(void); 191 int usb_kbd_deregister(void); 192 193 #endif 194 /* routines */ 195 int usb_init(void); /* initialize the USB Controller */ 196 int usb_stop(void); /* stop the USB Controller */ 197 198 199 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol); 200 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, 201 int report_id); 202 struct usb_device *usb_get_dev_index(int index); 203 int usb_control_msg(struct usb_device *dev, unsigned int pipe, 204 unsigned char request, unsigned char requesttype, 205 unsigned short value, unsigned short index, 206 void *data, unsigned short size, int timeout); 207 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, 208 void *data, int len, int *actual_length, int timeout); 209 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, 210 void *buffer, int transfer_len, int interval); 211 int usb_disable_asynch(int disable); 212 int usb_maxpacket(struct usb_device *dev, unsigned long pipe); 213 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer, 214 int cfgno); 215 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, 216 unsigned char id, void *buf, int size); 217 int usb_get_class_descriptor(struct usb_device *dev, int ifnum, 218 unsigned char type, unsigned char id, void *buf, 219 int size); 220 int usb_clear_halt(struct usb_device *dev, int pipe); 221 int usb_string(struct usb_device *dev, int index, char *buf, size_t size); 222 int usb_set_interface(struct usb_device *dev, int interface, int alternate); 223 224 /* big endian -> little endian conversion */ 225 /* some CPUs are already little endian e.g. the ARM920T */ 226 #define __swap_16(x) \ 227 ({ unsigned short x_ = (unsigned short)x; \ 228 (unsigned short)( \ 229 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \ 230 }) 231 #define __swap_32(x) \ 232 ({ unsigned long x_ = (unsigned long)x; \ 233 (unsigned long)( \ 234 ((x_ & 0x000000FFUL) << 24) | \ 235 ((x_ & 0x0000FF00UL) << 8) | \ 236 ((x_ & 0x00FF0000UL) >> 8) | \ 237 ((x_ & 0xFF000000UL) >> 24)); \ 238 }) 239 240 #ifdef __LITTLE_ENDIAN 241 # define swap_16(x) (x) 242 # define swap_32(x) (x) 243 #else 244 # define swap_16(x) __swap_16(x) 245 # define swap_32(x) __swap_32(x) 246 #endif 247 248 /* 249 * Calling this entity a "pipe" is glorifying it. A USB pipe 250 * is something embarrassingly simple: it basically consists 251 * of the following information: 252 * - device number (7 bits) 253 * - endpoint number (4 bits) 254 * - current Data0/1 state (1 bit) 255 * - direction (1 bit) 256 * - speed (2 bits) 257 * - max packet size (2 bits: 8, 16, 32 or 64) 258 * - pipe type (2 bits: control, interrupt, bulk, isochronous) 259 * 260 * That's 18 bits. Really. Nothing more. And the USB people have 261 * documented these eighteen bits as some kind of glorious 262 * virtual data structure. 263 * 264 * Let's not fall in that trap. We'll just encode it as a simple 265 * unsigned int. The encoding is: 266 * 267 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64) 268 * - direction: bit 7 (0 = Host-to-Device [Out], 269 * (1 = Device-to-Host [In]) 270 * - device: bits 8-14 271 * - endpoint: bits 15-18 272 * - Data0/1: bit 19 273 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, 274 * 10 = control, 11 = bulk) 275 * 276 * Why? Because it's arbitrary, and whatever encoding we select is really 277 * up to us. This one happens to share a lot of bit positions with the UHCI 278 * specification, so that much of the uhci driver can just mask the bits 279 * appropriately. 280 */ 281 /* Create various pipes... */ 282 #define create_pipe(dev,endpoint) \ 283 (((dev)->devnum << 8) | ((endpoint) << 15) | \ 284 (dev)->maxpacketsize) 285 #define default_pipe(dev) ((dev)->speed << 26) 286 287 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \ 288 create_pipe(dev, endpoint)) 289 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \ 290 create_pipe(dev, endpoint) | \ 291 USB_DIR_IN) 292 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \ 293 create_pipe(dev, endpoint)) 294 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \ 295 create_pipe(dev, endpoint) | \ 296 USB_DIR_IN) 297 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \ 298 create_pipe(dev, endpoint)) 299 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \ 300 create_pipe(dev, endpoint) | \ 301 USB_DIR_IN) 302 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \ 303 create_pipe(dev, endpoint)) 304 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \ 305 create_pipe(dev, endpoint) | \ 306 USB_DIR_IN) 307 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \ 308 default_pipe(dev)) 309 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \ 310 default_pipe(dev) | \ 311 USB_DIR_IN) 312 313 /* The D0/D1 toggle bits */ 314 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1) 315 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep)) 316 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \ 317 ((dev)->toggle[out] & \ 318 ~(1 << ep)) | ((bit) << ep)) 319 320 /* Endpoint halt control/status */ 321 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1) 322 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep))) 323 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep))) 324 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep))) 325 326 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \ 327 USB_PID_OUT) 328 329 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1) 330 #define usb_pipein(pipe) (((pipe) >> 7) & 1) 331 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) 332 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff) 333 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) 334 #define usb_pipedata(pipe) (((pipe) >> 19) & 1) 335 #define usb_pipetype(pipe) (((pipe) >> 30) & 3) 336 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) 337 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) 338 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) 339 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) 340 341 342 /************************************************************************* 343 * Hub Stuff 344 */ 345 struct usb_port_status { 346 unsigned short wPortStatus; 347 unsigned short wPortChange; 348 } __attribute__ ((packed)); 349 350 struct usb_hub_status { 351 unsigned short wHubStatus; 352 unsigned short wHubChange; 353 } __attribute__ ((packed)); 354 355 356 /* Hub descriptor */ 357 struct usb_hub_descriptor { 358 unsigned char bLength; 359 unsigned char bDescriptorType; 360 unsigned char bNbrPorts; 361 unsigned short wHubCharacteristics; 362 unsigned char bPwrOn2PwrGood; 363 unsigned char bHubContrCurrent; 364 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8]; 365 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8]; 366 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length 367 bitmaps that hold max 255 entries. (bit0 is ignored) */ 368 } __attribute__ ((packed)); 369 370 371 struct usb_hub_device { 372 struct usb_device *pusb_dev; 373 struct usb_hub_descriptor desc; 374 }; 375 376 int usb_hub_probe(struct usb_device *dev, int ifnum); 377 void usb_hub_reset(void); 378 int hub_port_reset(struct usb_device *dev, int port, 379 unsigned short *portstat); 380 381 struct usb_device *usb_alloc_new_device(void *controller); 382 383 int usb_new_device(struct usb_device *dev); 384 void usb_free_device(void); 385 386 #endif /*_USB_H_ */ 387