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>
33 * The EHCI spec says that we must align to at least 32 bytes. However,
34 * some platforms require larger alignment.
36 #if ARCH_DMA_MINALIGN > 32
37 #define USB_DMA_MINALIGN ARCH_DMA_MINALIGN
39 #define USB_DMA_MINALIGN 32
42 /* Everything is aribtrary */
43 #define USB_ALTSETTINGALLOC 4
44 #define USB_MAXALTSETTING 128 /* Hard limit */
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
53 #define USB_CNTL_TIMEOUT 100 /* 100ms timeout */
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.
59 #define USB_TIMEOUT_MS(pipe) (usb_pipebulk(pipe) ? 5000 : 1000)
61 /* device request (setup) */
63 unsigned char requesttype;
64 unsigned char request;
67 unsigned short length;
68 } __attribute__ ((packed));
70 /* All standard descriptors have these 2 fields in common */
71 struct usb_descriptor_header {
72 unsigned char bLength;
73 unsigned char bDescriptorType;
74 } __attribute__ ((packed));
77 struct usb_interface {
78 struct usb_interface_descriptor desc;
80 unsigned char no_of_ep;
81 unsigned char num_altsetting;
82 unsigned char act_altsetting;
84 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
85 } __attribute__ ((packed));
87 /* Configuration information.. */
89 struct usb_configuration_descriptor desc;
91 unsigned char no_of_if; /* number of interfaces */
92 struct usb_interface if_desc[USB_MAXINTERFACES];
93 } __attribute__ ((packed));
96 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
104 int devnum; /* Device number on USB bus */
105 int speed; /* full/low/high */
106 char mf[32]; /* manufacturer */
107 char prod[32]; /* product */
108 char serial[32]; /* serial number */
110 /* Maximum packet size; one of: PACKET_SIZE_* */
112 /* one bit for each endpoint ([0] = IN, [1] = OUT) */
113 unsigned int toggle[2];
114 /* endpoint halts; one bit per endpoint # & direction;
115 * [0] = IN, [1] = OUT
117 unsigned int halted[2];
118 int epmaxpacketin[16]; /* INput endpoint specific maximums */
119 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
121 int configno; /* selected config number */
122 /* Device Descriptor */
123 struct usb_device_descriptor descriptor
124 __attribute__((aligned(ARCH_DMA_MINALIGN)));
125 struct usb_config config; /* config descriptor */
127 int have_langid; /* whether string_langid is valid yet */
128 int string_langid; /* language ID for strings */
129 int (*irq_handle)(struct usb_device *dev);
130 unsigned long irq_status;
131 int irq_act_len; /* transfered bytes */
134 * Child devices - if this is a hub device
135 * Each instance needs its own set of data structures.
137 unsigned long status;
138 int act_len; /* transfered bytes */
139 int maxchild; /* Number of ports if hub */
141 struct usb_device *parent;
142 struct usb_device *children[USB_MAXCHILDREN];
144 void *controller; /* hardware controller private data */
147 /**********************************************************************
148 * this is how the lowlevel part communicate with the outer world
151 #if defined(CONFIG_USB_UHCI) || defined(CONFIG_USB_OHCI) || \
152 defined(CONFIG_USB_EHCI) || defined(CONFIG_USB_OHCI_NEW) || \
153 defined(CONFIG_USB_SL811HS) || defined(CONFIG_USB_ISP116X_HCD) || \
154 defined(CONFIG_USB_R8A66597_HCD) || defined(CONFIG_USB_DAVINCI) || \
155 defined(CONFIG_USB_OMAP3) || defined(CONFIG_USB_DA8XX) || \
156 defined(CONFIG_USB_BLACKFIN) || defined(CONFIG_USB_AM35X)
158 int usb_lowlevel_init(int index, void **controller);
159 int usb_lowlevel_stop(int index);
161 int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
162 void *buffer, int transfer_len);
163 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
164 int transfer_len, struct devrequest *setup);
165 int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
166 int transfer_len, int interval);
169 #define USB_UHCI_VEND_ID 0x8086
170 #define USB_UHCI_DEV_ID 0x7112
173 #error USB Lowlevel not defined
176 #ifdef CONFIG_USB_STORAGE
178 #define USB_MAX_STOR_DEV 5
179 block_dev_desc_t *usb_stor_get_dev(int index);
180 int usb_stor_scan(int mode);
181 int usb_stor_info(void);
185 #ifdef CONFIG_USB_HOST_ETHER
187 #define USB_MAX_ETH_DEV 5
188 int usb_host_eth_scan(int mode);
192 #ifdef CONFIG_USB_KEYBOARD
194 int drv_usb_kbd_init(void);
195 int usb_kbd_deregister(void);
199 int usb_init(void); /* initialize the USB Controller */
200 int usb_stop(void); /* stop the USB Controller */
203 int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
204 int usb_set_idle(struct usb_device *dev, int ifnum, int duration,
206 struct usb_device *usb_get_dev_index(int index);
207 int usb_control_msg(struct usb_device *dev, unsigned int pipe,
208 unsigned char request, unsigned char requesttype,
209 unsigned short value, unsigned short index,
210 void *data, unsigned short size, int timeout);
211 int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
212 void *data, int len, int *actual_length, int timeout);
213 int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
214 void *buffer, int transfer_len, int interval);
215 int usb_disable_asynch(int disable);
216 int usb_maxpacket(struct usb_device *dev, unsigned long pipe);
217 int usb_get_configuration_no(struct usb_device *dev, unsigned char *buffer,
219 int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
220 unsigned char id, void *buf, int size);
221 int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
222 unsigned char type, unsigned char id, void *buf,
224 int usb_clear_halt(struct usb_device *dev, int pipe);
225 int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
226 int usb_set_interface(struct usb_device *dev, int interface, int alternate);
228 /* big endian -> little endian conversion */
229 /* some CPUs are already little endian e.g. the ARM920T */
230 #define __swap_16(x) \
231 ({ unsigned short x_ = (unsigned short)x; \
233 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
235 #define __swap_32(x) \
236 ({ unsigned long x_ = (unsigned long)x; \
238 ((x_ & 0x000000FFUL) << 24) | \
239 ((x_ & 0x0000FF00UL) << 8) | \
240 ((x_ & 0x00FF0000UL) >> 8) | \
241 ((x_ & 0xFF000000UL) >> 24)); \
244 #ifdef __LITTLE_ENDIAN
245 # define swap_16(x) (x)
246 # define swap_32(x) (x)
248 # define swap_16(x) __swap_16(x)
249 # define swap_32(x) __swap_32(x)
253 * Calling this entity a "pipe" is glorifying it. A USB pipe
254 * is something embarrassingly simple: it basically consists
255 * of the following information:
256 * - device number (7 bits)
257 * - endpoint number (4 bits)
258 * - current Data0/1 state (1 bit)
259 * - direction (1 bit)
261 * - max packet size (2 bits: 8, 16, 32 or 64)
262 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
264 * That's 18 bits. Really. Nothing more. And the USB people have
265 * documented these eighteen bits as some kind of glorious
266 * virtual data structure.
268 * Let's not fall in that trap. We'll just encode it as a simple
269 * unsigned int. The encoding is:
271 * - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64)
272 * - direction: bit 7 (0 = Host-to-Device [Out],
273 * (1 = Device-to-Host [In])
274 * - device: bits 8-14
275 * - endpoint: bits 15-18
277 * - speed: bit 26 (0 = Full, 1 = Low Speed, 2 = High)
278 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
279 * 10 = control, 11 = bulk)
281 * Why? Because it's arbitrary, and whatever encoding we select is really
282 * up to us. This one happens to share a lot of bit positions with the UHCI
283 * specification, so that much of the uhci driver can just mask the bits
286 /* Create various pipes... */
287 #define create_pipe(dev,endpoint) \
288 (((dev)->devnum << 8) | ((endpoint) << 15) | \
289 ((dev)->speed << 26) | (dev)->maxpacketsize)
290 #define default_pipe(dev) ((dev)->speed << 26)
292 #define usb_sndctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
293 create_pipe(dev, endpoint))
294 #define usb_rcvctrlpipe(dev, endpoint) ((PIPE_CONTROL << 30) | \
295 create_pipe(dev, endpoint) | \
297 #define usb_sndisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
298 create_pipe(dev, endpoint))
299 #define usb_rcvisocpipe(dev, endpoint) ((PIPE_ISOCHRONOUS << 30) | \
300 create_pipe(dev, endpoint) | \
302 #define usb_sndbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
303 create_pipe(dev, endpoint))
304 #define usb_rcvbulkpipe(dev, endpoint) ((PIPE_BULK << 30) | \
305 create_pipe(dev, endpoint) | \
307 #define usb_sndintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
308 create_pipe(dev, endpoint))
309 #define usb_rcvintpipe(dev, endpoint) ((PIPE_INTERRUPT << 30) | \
310 create_pipe(dev, endpoint) | \
312 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
314 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
315 default_pipe(dev) | \
318 /* The D0/D1 toggle bits */
319 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
320 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
321 #define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = \
322 ((dev)->toggle[out] & \
323 ~(1 << ep)) | ((bit) << ep))
325 /* Endpoint halt control/status */
326 #define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
327 #define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
328 #define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
329 #define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
331 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
334 #define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
335 #define usb_pipein(pipe) (((pipe) >> 7) & 1)
336 #define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
337 #define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
338 #define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
339 #define usb_pipedata(pipe) (((pipe) >> 19) & 1)
340 #define usb_pipespeed(pipe) (((pipe) >> 26) & 3)
341 #define usb_pipeslow(pipe) (usb_pipespeed(pipe) == USB_SPEED_LOW)
342 #define usb_pipetype(pipe) (((pipe) >> 30) & 3)
343 #define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
344 #define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
345 #define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
346 #define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
349 /*************************************************************************
352 struct usb_port_status {
353 unsigned short wPortStatus;
354 unsigned short wPortChange;
355 } __attribute__ ((packed));
357 struct usb_hub_status {
358 unsigned short wHubStatus;
359 unsigned short wHubChange;
360 } __attribute__ ((packed));
364 struct usb_hub_descriptor {
365 unsigned char bLength;
366 unsigned char bDescriptorType;
367 unsigned char bNbrPorts;
368 unsigned short wHubCharacteristics;
369 unsigned char bPwrOn2PwrGood;
370 unsigned char bHubContrCurrent;
371 unsigned char DeviceRemovable[(USB_MAXCHILDREN+1+7)/8];
372 unsigned char PortPowerCtrlMask[(USB_MAXCHILDREN+1+7)/8];
373 /* DeviceRemovable and PortPwrCtrlMask want to be variable-length
374 bitmaps that hold max 255 entries. (bit0 is ignored) */
375 } __attribute__ ((packed));
378 struct usb_hub_device {
379 struct usb_device *pusb_dev;
380 struct usb_hub_descriptor desc;
383 int usb_hub_probe(struct usb_device *dev, int ifnum);
384 void usb_hub_reset(void);
385 int hub_port_reset(struct usb_device *dev, int port,
386 unsigned short *portstat);
388 struct usb_device *usb_alloc_new_device(void *controller);
390 int usb_new_device(struct usb_device *dev);