3 * Denis Peter, MPL AG Switzerland
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
23 * Note: Part of this code has been derived from linux
30 #include <usbdescriptors.h>
32 /* Everything is aribtrary */
33 #define USB_ALTSETTINGALLOC 4
34 #define USB_MAXALTSETTING 128 /* Hard limit */
36 #define USB_MAX_DEVICE 32
37 #define USB_MAXCONFIG 8
38 #define USB_MAXINTERFACES 8
39 #define USB_MAXENDPOINTS 16
40 #define USB_MAXCHILDREN 8 /* This is arbitrary */
41 #define USB_MAX_HUB 16
43 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
46 * This is the timeout to allow for submitting an urb in ms. We allow more
47 * time for a BULK device to react - some are slow.
49 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
51 /* device request (setup) */
53 unsigned char requesttype;
54 unsigned char request;
57 unsigned short length;
58 } __attribute__ ((packed));
60 /* All standard descriptors have these 2 fields in common */
61 struct usb_descriptor_header {
62 unsigned char bLength;
63 unsigned char bDescriptorType;
64 } __attribute__ ((packed));
67 struct usb_interface {
68 struct usb_interface_descriptor desc;
70 unsigned char no_of_ep;
71 unsigned char num_altsetting;
72 unsigned char act_altsetting;
74 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
75 } __attribute__ ((packed));
77 /* Configuration information.. */
79 struct usb_configuration_descriptor desc;
81 unsigned char no_of_if; /* number of interfaces */
82 struct usb_interface if_desc[USB_MAXINTERFACES];
83 } __attribute__ ((packed));
86 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
94 int devnum; /* Device number on USB bus */
95 int speed; /* full/low/high */
96 char mf[32]; /* manufacturer */
97 char prod[32]; /* product */
98 char serial[32]; /* serial number */
100 /* Maximum packet size; one of: PACKET_SIZE_* */
102 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
103 unsigned int toggle[2];
104 /* endpoint halts; one bit per endpoint # & direction;
105 * [0] = IN, [1] = OUT
107 unsigned int halted[2];
108 int epmaxpacketin[16]; /* INput endpoint specific maximums */
109 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
111 int configno; /* selected config number */
112 /* Device Descriptor */
113 struct usb_device_descriptor descriptor
114 __attribute__((aligned(ARCH_DMA_MINALIGN)));
115 struct usb_config config; /* config descriptor */
117 int have_langid; /* whether string_langid is valid yet */
118 int string_langid; /* language ID for strings */
119 int (*irq_handle)(struct usb_device *dev);
120 unsigned long irq_status;
121 int irq_act_len; /* transfered bytes */
124 * Child devices - if this is a hub device
125 * Each instance needs its own set of data structures.
127 unsigned long status;
128 int act_len; /* transfered bytes */
129 int maxchild; /* Number of ports if hub */
131 struct usb_device *parent;
132 struct usb_device *children[USB_MAXCHILDREN];
135 /**********************************************************************
136 * this is how the lowlevel part communicate with the outer world
139 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
140 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
141 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
142 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
143 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
144 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
146 int usb_lowlevel_init(void);
147 int usb_lowlevel_stop(void);
148 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
149 void *buffer, int transfer_len);
150 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
151 int transfer_len, struct devrequest *setup);
152 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
153 int transfer_len, int interval);
156 #define USB_UHCI_VEND_ID 0x8086
157 #define USB_UHCI_DEV_ID 0x7112
160 #error USB Lowlevel not defined
163 #ifdef CONFIG_USB_STORAGE
165 #define USB_MAX_STOR_DEV 5
166 block_dev_desc_t *usb_stor_get_dev(int index);
167 int usb_stor_scan(int mode);
168 int usb_stor_info(void);
172 #ifdef CONFIG_USB_HOST_ETHER
174 #define USB_MAX_ETH_DEV 5
175 int usb_host_eth_scan(int mode);
179 #ifdef CONFIG_USB_KEYBOARD
181 int drv_usb_kbd_init(void);
182 int usb_kbd_deregister(void);
186 int usb_init(void); /* initialize the USB Controller */
187 int usb_stop(void); /* stop the USB Controller */
190 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
191 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
193 struct usb_device *usb_get_dev_index(int index);
194 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
195 unsigned char request, unsigned char requesttype,
196 unsigned short value, unsigned short index,
197 void *data, unsigned short size, int timeout);
198 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
199 void *data, int len, int *actual_length, int timeout);
200 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
201 void *buffer, int transfer_len, int interval);
202 int usb_disable_asynch(int disable);
203 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
204 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
206 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
207 unsigned char id, void *buf, int size);
208 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
209 unsigned char type, unsigned char id, void *buf,
211 int usb_clear_halt(struct usb_device *dev, int pipe);
212 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
213 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
215 /* big endian -> little endian conversion */
216 /* some CPUs are already little endian e.g. the ARM920T */
217 #define __swap_16(x) \
218 ({ unsigned short x_ = (unsigned short)x; \
220 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
222 #define __swap_32(x) \
223 ({ unsigned long x_ = (unsigned long)x; \
225 ((x_ & 0x000000FFUL) << 24) | \
226 ((x_ & 0x0000FF00UL) << 8) | \
227 ((x_ & 0x00FF0000UL) >> 8) | \
228 ((x_ & 0xFF000000UL) >> 24)); \
231 #ifdef __LITTLE_ENDIAN
232 # define swap_16(x) (x)
233 # define swap_32(x) (x)
235 # define swap_16(x) __swap_16(x)
236 # define swap_32(x) __swap_32(x)
240 * Calling this entity a "pipe" is glorifying it. A USB pipe
241 * is something embarrassingly simple: it basically consists
242 * of the following information:
243 * - device number (7 bits)
244 * - endpoint number (4 bits)
245 * - current Data0/1 state (1 bit)
246 * - direction (1 bit)
248 * - max packet size (2 bits: 8, 16, 32 or 64)
249 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
251 * That's 18 bits. Really. Nothing more. And the USB people have
252 * documented these eighteen bits as some kind of glorious
253 * virtual data structure.
255 * Let's not fall in that trap. We'll just encode it as a simple
256 * unsigned int. The encoding is:
258 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
259 * - direction: bit 7 (0 = Host-to-Device [Out],
260 * (1 = Device-to-Host [In])
261 * - device: bits 8-14
262 * - endpoint: bits 15-18
264 * - speed: bit 26 (0 = Full, 1 = Low Speed, 2 = High)
265 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
266 * 10 = control, 11 = bulk)
268 * Why? Because it's arbitrary, and whatever encoding we select is really
269 * up to us. This one happens to share a lot of bit positions with the UHCI
270 * specification, so that much of the uhci driver can just mask the bits
273 /* Create various pipes... */
274 #define create_pipe(dev,endpoint) \
275 (((dev)->devnum << 8) | ((endpoint) << 15) | \
276 ((dev)->speed << 26) | (dev)->maxpacketsize)
277 #define default_pipe(dev) ((dev)->speed << 26)
279 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
280 create_pipe(dev, endpoint))
281 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
282 create_pipe(dev, endpoint) | \
284 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
285 create_pipe(dev, endpoint))
286 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
287 create_pipe(dev, endpoint) | \
289 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
290 create_pipe(dev, endpoint))
291 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
292 create_pipe(dev, endpoint) | \
294 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
295 create_pipe(dev, endpoint))
296 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
297 create_pipe(dev, endpoint) | \
299 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
301 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
302 default_pipe(dev) | \
305 /* The D0/D1 toggle bits */
306 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
307 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
308 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
309 ((dev)->toggle[out] & \
310 ~(1 << ep)) | ((bit) << ep))
312 /* Endpoint halt control/status */
313 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
314 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
315 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
316 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
318 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
321 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
322 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
323 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
324 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
325 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
326 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
327 #define usb_pipespeed(pipe) (((pipe) >> 26) & 3)
328 #define usb_pipeslow(pipe) (usb_pipespeed(pipe) == USB_SPEED_LOW)
329 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
330 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
331 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
332 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
333 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
336 /*************************************************************************
339 struct usb_port_status {
340 unsigned short wPortStatus;
341 unsigned short wPortChange;
342 } __attribute__ ((packed));
344 struct usb_hub_status {
345 unsigned short wHubStatus;
346 unsigned short wHubChange;
347 } __attribute__ ((packed));
351 struct usb_hub_descriptor {
352 unsigned char bLength;
353 unsigned char bDescriptorType;
354 unsigned char bNbrPorts;
355 unsigned short wHubCharacteristics;
356 unsigned char bPwrOn2PwrGood;
357 unsigned char bHubContrCurrent;
358 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
359 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
360 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
361 bitmaps that hold max 255 entries. (bit0 is ignored) */
362 } __attribute__ ((packed));
365 struct usb_hub_device {
366 struct usb_device *pusb_dev;
367 struct usb_hub_descriptor desc;
370 int usb_hub_probe(struct usb_device *dev, int ifnum);
371 void usb_hub_reset(void);
372 int hub_port_reset(struct usb_device *dev, int port,
373 unsigned short *portstat);
375 struct usb_device *usb_alloc_new_device(void);
376 int usb_new_device(struct usb_device *dev);