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 <linux/usb/ch9.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));
71 struct usb_interface {
72 struct usb_interface_descriptor desc;
74 unsigned char no_of_ep;
75 unsigned char num_altsetting;
76 unsigned char act_altsetting;
78 struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
79 } __attribute__ ((packed));
81 /* Configuration information.. */
83 struct usb_config_descriptor desc;
85 unsigned char no_of_if; /* number of interfaces */
86 struct usb_interface if_desc[USB_MAXINTERFACES];
87 } __attribute__ ((packed));
90 /* Maximum packet size; encoded as 0,1,2,3 = 8,16,32,64 */
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 */
104 /* Maximum packet size; one of: PACKET_SIZE_* */
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
111 unsigned int halted[2];
112 int epmaxpacketin[16]; /* INput endpoint specific maximums */
113 int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
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 */
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 */
128 * Child devices - if this is a hub device
129 * Each instance needs its own set of data structures.
131 unsigned long status;
132 int act_len; /* transfered bytes */
133 int maxchild; /* Number of ports if hub */
135 struct usb_device *parent;
136 struct usb_device *children[USB_MAXCHILDREN];
138 void *controller; /* hardware controller private data */
141 /**********************************************************************
142 * this is how the lowlevel part communicate with the outer world
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)
154 int usb_lowlevel_init(int index, void **controller);
155 int usb_lowlevel_stop(int index);
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);
165 #define USB_UHCI_VEND_ID 0x8086
166 #define USB_UHCI_DEV_ID 0x7112
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.
175 #elif defined(CONFIG_USB_GADGET_PXA2XX)
177 extern void udc_disconnect(void);
180 #error USB Lowlevel not defined
183 #ifdef CONFIG_USB_STORAGE
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);
192 #ifdef CONFIG_USB_HOST_ETHER
194 #define USB_MAX_ETH_DEV 5
195 int usb_host_eth_scan(int mode);
199 #ifdef CONFIG_USB_KEYBOARD
201 int drv_usb_kbd_init(void);
202 int usb_kbd_deregister(void);
206 int usb_init(void); /* initialize the USB Controller */
207 int usb_stop(void); /* stop the USB Controller */
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,
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,
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,
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);
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; \
240 ((x_ & 0x00FFU) << 8) | ((x_ & 0xFF00U) >> 8)); \
242 #define __swap_32(x) \
243 ({ unsigned long x_ = (unsigned long)x; \
245 ((x_ & 0x000000FFUL) << 24) | \
246 ((x_ & 0x0000FF00UL) << 8) | \
247 ((x_ & 0x00FF0000UL) >> 8) | \
248 ((x_ & 0xFF000000UL) >> 24)); \
251 #ifdef __LITTLE_ENDIAN
252 # define swap_16(x) (x)
253 # define swap_32(x) (x)
255 # define swap_16(x) __swap_16(x)
256 # define swap_32(x) __swap_32(x)
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)
268 * - max packet size (2 bits: 8, 16, 32 or 64)
269 * - pipe type (2 bits: control, interrupt, bulk, isochronous)
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.
275 * Let's not fall in that trap. We'll just encode it as a simple
276 * unsigned int. The encoding is:
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
284 * - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt,
285 * 10 = control, 11 = bulk)
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
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)
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) | \
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) | \
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) | \
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) | \
318 #define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | \
320 #define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | \
321 default_pipe(dev) | \
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))
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)))
337 #define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : \
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)
353 /*************************************************************************
356 struct usb_port_status {
357 unsigned short wPortStatus;
358 unsigned short wPortChange;
359 } __attribute__ ((packed));
361 struct usb_hub_status {
362 unsigned short wHubStatus;
363 unsigned short wHubChange;
364 } __attribute__ ((packed));
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));
382 struct usb_hub_device {
383 struct usb_device *pusb_dev;
384 struct usb_hub_descriptor desc;
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);
392 struct usb_device *usb_alloc_new_device(void *controller);
394 int usb_new_device(struct usb_device *dev);
395 void usb_free_device(void);