1 /* 2 * (C) Copyright 2001 3 * Denis Peter, MPL AG Switzerland 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 * 23 * Note: Part of this code has been derived from linux 24 * 25 */ 26 #ifndef _USB_H_ 27 #define _USB_H_ 28 29 #include <usb_defs.h> 30 #include <linux/usb/ch9.h> 31 32 /* 33 * The EHCI spec says that we must align to at least 32 bytes. However, 34 * some platforms require larger alignment. 35 */ 36 #if ARCH_DMA_MINALIGN > 32 37 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN 38 #else 39 #define USB_DMA_MINALIGN 32 40 #endif 41 42 /* Everything is aribtrary */ 43 #define USB_ALTSETTINGALLOC 4 44 #define USB_MAXALTSETTING 128 /* Hard limit */ 45 46 #define USB_MAX_DEVICE 32 47 #define USB_MAXCONFIG 8 48 #define USB_MAXINTERFACES 8 49 #define USB_MAXENDPOINTS 16 50 #define USB_MAXCHILDREN 8 /* This is arbitrary */ 51 #define USB_MAX_HUB 16 52 53 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */ 54 55 /* 56 * This is the timeout to allow for submitting an urb in ms. We allow more 57 * time for a BULK device to react - some are slow. 58 */ 59 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000) 60 61 /* device request (setup) */ 62 struct devrequest { 63 unsigned char requesttype; 64 unsigned char request; 65 unsigned short value; 66 unsigned short index; 67 unsigned short length; 68 } __attribute__ ((packed)); 69 70 /* Interface */ 71 struct usb_interface { 72 struct usb_interface_descriptor desc; 73 74 unsigned char no_of_ep; 75 unsigned char num_altsetting; 76 unsigned char act_altsetting; 77 78 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS]; 79 } __attribute__ ((packed)); 80 81 /* Configuration information.. */ 82 struct usb_config { 83 struct usb_config_descriptor desc; 84 85 unsigned char no_of_if; /* number of interfaces */ 86 struct usb_interface if_desc[USB_MAXINTERFACES]; 87 } __attribute__ ((packed)); 88 89 enum { 90 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */ 91 PACKET_SIZE_8 = 0, 92 PACKET_SIZE_16 = 1, 93 PACKET_SIZE_32 = 2, 94 PACKET_SIZE_64 = 3, 95 }; 96 97 struct usb_device { 98 int devnum; /* Device number on USB bus */ 99 int speed; /* full/low/high */ 100 char mf[32]; /* manufacturer */ 101 char prod[32]; /* product */ 102 char serial[32]; /* serial number */ 103 104 /* Maximum packet size; one of: PACKET_SIZE_* */ 105 int maxpacketsize; 106 /* one bit for each endpoint ([0] = IN, [1] = OUT) */ 107 unsigned int toggle[2]; 108 /* endpoint halts; one bit per endpoint # & direction; 109 * [0] = IN, [1] = OUT 110 */ 111 unsigned int halted[2]; 112 int epmaxpacketin[16]; /* INput endpoint specific maximums */ 113 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */ 114 115 int configno; /* selected config number */ 116 /* Device Descriptor */ 117 struct usb_device_descriptor descriptor 118 __attribute__((aligned(ARCH_DMA_MINALIGN))); 119 struct usb_config config; /* config descriptor */ 120 121 int have_langid; /* whether string_langid is valid yet */ 122 int string_langid; /* language ID for strings */ 123 int (*irq_handle)(struct usb_device *dev); 124 unsigned long irq_status; 125 int irq_act_len; /* transfered bytes */ 126 void *privptr; 127 /* 128 * Child devices - if this is a hub device 129 * Each instance needs its own set of data structures. 130 */ 131 unsigned long status; 132 int act_len; /* transfered bytes */ 133 int maxchild; /* Number of ports if hub */ 134 int portnr; 135 struct usb_device *parent; 136 struct usb_device *children[USB_MAXCHILDREN]; 137 138 void *controller; /* hardware controller private data */ 139 }; 140 141 /********************************************************************** 142 * this is how the lowlevel part communicate with the outer world 143 */ 144 145 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \ 146 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \ 147 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \ 148 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \ 149 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \ 150 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X) || \ 151 defined(CONFIG_USB_MUSB_DSPS) || defined(CONFIG_USB_MUSB_AM35X) || \ 152 defined(CONFIG_USB_MUSB_OMAP2PLUS) 153 154 int usb_lowlevel_init(int index, void **controller); 155 int usb_lowlevel_stop(int index); 156 157 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, 158 void *buffer, int transfer_len); 159 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 160 int transfer_len, struct devrequest *setup); 161 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer, 162 int transfer_len, int interval); 163 164 /* Defines */ 165 #define USB_UHCI_VEND_ID 0x8086 166 #define USB_UHCI_DEV_ID 0x7112 167 168 /* 169 * PXA25x can only act as USB device. There are drivers 170 * which works with USB CDC gadgets implementations. 171 * Some of them have common routines which can be used 172 * in boards init functions e.g. udc_disconnect() used for 173 * forced device disconnection from host. 174 */ 175 #elif defined(CONFIG_USB_GADGET_PXA2XX) 176 177 extern void udc_disconnect(void); 178 179 #else 180 #error USB Lowlevel not defined 181 #endif 182 183 #ifdef CONFIG_USB_STORAGE 184 185 #define USB_MAX_STOR_DEV 5 186 block_dev_desc_t *usb_stor_get_dev(int index); 187 int usb_stor_scan(int mode); 188 int usb_stor_info(void); 189 190 #endif 191 192 #ifdef CONFIG_USB_HOST_ETHER 193 194 #define USB_MAX_ETH_DEV 5 195 int usb_host_eth_scan(int mode); 196 197 #endif 198 199 #ifdef CONFIG_USB_KEYBOARD 200 201 int drv_usb_kbd_init(void); 202 int usb_kbd_deregister(void); 203 204 #endif 205 /* routines */ 206 int usb_init(void); /* initialize the USB Controller */ 207 int usb_stop(void); /* stop the USB Controller */ 208 209 210 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol); 211 int usb_set_idle(struct usb_device *dev, int ifnum, int duration, 212 int report_id); 213 struct usb_device *usb_get_dev_index(int index); 214 int usb_control_msg(struct usb_device *dev, unsigned int pipe, 215 unsigned char request, unsigned char requesttype, 216 unsigned short value, unsigned short index, 217 void *data, unsigned short size, int timeout); 218 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, 219 void *data, int len, int *actual_length, int timeout); 220 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, 221 void *buffer, int transfer_len, int interval); 222 int usb_disable_asynch(int disable); 223 int usb_maxpacket(struct usb_device *dev, unsigned long pipe); 224 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer, 225 int cfgno); 226 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, 227 unsigned char id, void *buf, int size); 228 int usb_get_class_descriptor(struct usb_device *dev, int ifnum, 229 unsigned char type, unsigned char id, void *buf, 230 int size); 231 int usb_clear_halt(struct usb_device *dev, int pipe); 232 int usb_string(struct usb_device *dev, int index, char *buf, size_t size); 233 int usb_set_interface(struct usb_device *dev, int interface, int alternate); 234 235 /* big endian -> little endian conversion */ 236 /* some CPUs are already little endian e.g. the ARM920T */ 237 #define __swap_16(x) \ 238 ({ unsigned short x_ = (unsigned short)x; \ 239 (unsigned short)( \ 240 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \ 241 }) 242 #define __swap_32(x) \ 243 ({ unsigned long x_ = (unsigned long)x; \ 244 (unsigned long)( \ 245 ((x_ & 0x000000FFUL) << 24) | \ 246 ((x_ & 0x0000FF00UL) << 8) | \ 247 ((x_ & 0x00FF0000UL) >> 8) | \ 248 ((x_ & 0xFF000000UL) >> 24)); \ 249 }) 250 251 #ifdef __LITTLE_ENDIAN 252 # define swap_16(x) (x) 253 # define swap_32(x) (x) 254 #else 255 # define swap_16(x) __swap_16(x) 256 # define swap_32(x) __swap_32(x) 257 #endif 258 259 /* 260 * Calling this entity a "pipe" is glorifying it. A USB pipe 261 * is something embarrassingly simple: it basically consists 262 * of the following information: 263 * - device number (7 bits) 264 * - endpoint number (4 bits) 265 * - current Data0/1 state (1 bit) 266 * - direction (1 bit) 267 * - speed (2 bits) 268 * - max packet size (2 bits: 8, 16, 32 or 64) 269 * - pipe type (2 bits: control, interrupt, bulk, isochronous) 270 * 271 * That's 18 bits. Really. Nothing more. And the USB people have 272 * documented these eighteen bits as some kind of glorious 273 * virtual data structure. 274 * 275 * Let's not fall in that trap. We'll just encode it as a simple 276 * unsigned int. The encoding is: 277 * 278 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64) 279 * - direction: bit 7 (0 = Host-to-Device [Out], 280 * (1 = Device-to-Host [In]) 281 * - device: bits 8-14 282 * - endpoint: bits 15-18 283 * - Data0/1: bit 19 284 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, 285 * 10 = control, 11 = bulk) 286 * 287 * Why? Because it's arbitrary, and whatever encoding we select is really 288 * up to us. This one happens to share a lot of bit positions with the UHCI 289 * specification, so that much of the uhci driver can just mask the bits 290 * appropriately. 291 */ 292 /* Create various pipes... */ 293 #define create_pipe(dev,endpoint) \ 294 (((dev)->devnum << 8) | ((endpoint) << 15) | \ 295 (dev)->maxpacketsize) 296 #define default_pipe(dev) ((dev)->speed << 26) 297 298 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \ 299 create_pipe(dev, endpoint)) 300 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \ 301 create_pipe(dev, endpoint) | \ 302 USB_DIR_IN) 303 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \ 304 create_pipe(dev, endpoint)) 305 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \ 306 create_pipe(dev, endpoint) | \ 307 USB_DIR_IN) 308 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \ 309 create_pipe(dev, endpoint)) 310 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \ 311 create_pipe(dev, endpoint) | \ 312 USB_DIR_IN) 313 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \ 314 create_pipe(dev, endpoint)) 315 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \ 316 create_pipe(dev, endpoint) | \ 317 USB_DIR_IN) 318 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \ 319 default_pipe(dev)) 320 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \ 321 default_pipe(dev) | \ 322 USB_DIR_IN) 323 324 /* The D0/D1 toggle bits */ 325 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1) 326 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep)) 327 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \ 328 ((dev)->toggle[out] & \ 329 ~(1 << ep)) | ((bit) << ep)) 330 331 /* Endpoint halt control/status */ 332 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1) 333 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep))) 334 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep))) 335 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep))) 336 337 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \ 338 USB_PID_OUT) 339 340 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1) 341 #define usb_pipein(pipe) (((pipe) >> 7) & 1) 342 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f) 343 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff) 344 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf) 345 #define usb_pipedata(pipe) (((pipe) >> 19) & 1) 346 #define usb_pipetype(pipe) (((pipe) >> 30) & 3) 347 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS) 348 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT) 349 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL) 350 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK) 351 352 353 /************************************************************************* 354 * Hub Stuff 355 */ 356 struct usb_port_status { 357 unsigned short wPortStatus; 358 unsigned short wPortChange; 359 } __attribute__ ((packed)); 360 361 struct usb_hub_status { 362 unsigned short wHubStatus; 363 unsigned short wHubChange; 364 } __attribute__ ((packed)); 365 366 367 /* Hub descriptor */ 368 struct usb_hub_descriptor { 369 unsigned char bLength; 370 unsigned char bDescriptorType; 371 unsigned char bNbrPorts; 372 unsigned short wHubCharacteristics; 373 unsigned char bPwrOn2PwrGood; 374 unsigned char bHubContrCurrent; 375 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8]; 376 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8]; 377 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length 378 bitmaps that hold max 255 entries. (bit0 is ignored) */ 379 } __attribute__ ((packed)); 380 381 382 struct usb_hub_device { 383 struct usb_device *pusb_dev; 384 struct usb_hub_descriptor desc; 385 }; 386 387 int usb_hub_probe(struct usb_device *dev, int ifnum); 388 void usb_hub_reset(void); 389 int hub_port_reset(struct usb_device *dev, int port, 390 unsigned short *portstat); 391 392 struct usb_device *usb_alloc_new_device(void *controller); 393 394 int usb_new_device(struct usb_device *dev); 395 396 #endif /*_USB_H_ */ 397