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1da177e4 LT |
1 | /* |
2 | * g_serial.c -- USB gadget serial driver | |
3 | * | |
4 | * Copyright 2003 (C) Al Borchers (alborchers@steinerpoint.com) | |
5 | * | |
6 | * This code is based in part on the Gadget Zero driver, which | |
7 | * is Copyright (C) 2003 by David Brownell, all rights reserved. | |
8 | * | |
9 | * This code also borrows from usbserial.c, which is | |
10 | * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) | |
11 | * Copyright (C) 2000 Peter Berger (pberger@brimson.com) | |
12 | * Copyright (C) 2000 Al Borchers (alborchers@steinerpoint.com) | |
13 | * | |
14 | * This software is distributed under the terms of the GNU General | |
15 | * Public License ("GPL") as published by the Free Software Foundation, | |
16 | * either version 2 of that License or (at your option) any later version. | |
17 | * | |
18 | */ | |
19 | ||
1da177e4 | 20 | #include <linux/kernel.h> |
1da177e4 | 21 | #include <linux/utsname.h> |
1da177e4 LT |
22 | #include <linux/device.h> |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_flip.h> | |
1da177e4 | 25 | |
5f848137 | 26 | #include <linux/usb/ch9.h> |
a8c28f23 | 27 | #include <linux/usb/cdc.h> |
9454a57a | 28 | #include <linux/usb/gadget.h> |
1da177e4 LT |
29 | |
30 | #include "gadget_chips.h" | |
31 | ||
32 | ||
1da177e4 LT |
33 | /* Defines */ |
34 | ||
ca094f11 FBH |
35 | #define GS_VERSION_STR "v2.2" |
36 | #define GS_VERSION_NUM 0x0202 | |
1da177e4 LT |
37 | |
38 | #define GS_LONG_NAME "Gadget Serial" | |
39 | #define GS_SHORT_NAME "g_serial" | |
40 | ||
41 | #define GS_MAJOR 127 | |
42 | #define GS_MINOR_START 0 | |
43 | ||
44 | #define GS_NUM_PORTS 16 | |
45 | ||
46 | #define GS_NUM_CONFIGS 1 | |
47 | #define GS_NO_CONFIG_ID 0 | |
48 | #define GS_BULK_CONFIG_ID 1 | |
49 | #define GS_ACM_CONFIG_ID 2 | |
50 | ||
51 | #define GS_MAX_NUM_INTERFACES 2 | |
52 | #define GS_BULK_INTERFACE_ID 0 | |
53 | #define GS_CONTROL_INTERFACE_ID 0 | |
54 | #define GS_DATA_INTERFACE_ID 1 | |
55 | ||
56 | #define GS_MAX_DESC_LEN 256 | |
57 | ||
58 | #define GS_DEFAULT_READ_Q_SIZE 32 | |
59 | #define GS_DEFAULT_WRITE_Q_SIZE 32 | |
60 | ||
61 | #define GS_DEFAULT_WRITE_BUF_SIZE 8192 | |
62 | #define GS_TMP_BUF_SIZE 8192 | |
63 | ||
64 | #define GS_CLOSE_TIMEOUT 15 | |
65 | ||
66 | #define GS_DEFAULT_USE_ACM 0 | |
67 | ||
68 | #define GS_DEFAULT_DTE_RATE 9600 | |
69 | #define GS_DEFAULT_DATA_BITS 8 | |
70 | #define GS_DEFAULT_PARITY USB_CDC_NO_PARITY | |
71 | #define GS_DEFAULT_CHAR_FORMAT USB_CDC_1_STOP_BITS | |
72 | ||
51a0e85c DB |
73 | /* maxpacket and other transfer characteristics vary by speed. */ |
74 | static inline struct usb_endpoint_descriptor * | |
75 | choose_ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, | |
76 | struct usb_endpoint_descriptor *fs) | |
77 | { | |
78 | if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) | |
79 | return hs; | |
80 | return fs; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | |
84 | /* debug settings */ | |
51a0e85c | 85 | #ifdef DEBUG |
1da177e4 | 86 | static int debug = 1; |
51a0e85c DB |
87 | #else |
88 | #define debug 0 | |
89 | #endif | |
1da177e4 LT |
90 | |
91 | #define gs_debug(format, arg...) \ | |
92 | do { if (debug) printk(KERN_DEBUG format, ## arg); } while(0) | |
93 | #define gs_debug_level(level, format, arg...) \ | |
94 | do { if (debug>=level) printk(KERN_DEBUG format, ## arg); } while(0) | |
95 | ||
1da177e4 LT |
96 | |
97 | /* Thanks to NetChip Technologies for donating this product ID. | |
98 | * | |
99 | * DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! | |
100 | * Instead: allocate your own, using normal USB-IF procedures. | |
101 | */ | |
102 | #define GS_VENDOR_ID 0x0525 /* NetChip */ | |
103 | #define GS_PRODUCT_ID 0xa4a6 /* Linux-USB Serial Gadget */ | |
104 | #define GS_CDC_PRODUCT_ID 0xa4a7 /* ... as CDC-ACM */ | |
105 | ||
106 | #define GS_LOG2_NOTIFY_INTERVAL 5 /* 1 << 5 == 32 msec */ | |
107 | #define GS_NOTIFY_MAXPACKET 8 | |
108 | ||
109 | ||
110 | /* Structures */ | |
111 | ||
112 | struct gs_dev; | |
113 | ||
114 | /* circular buffer */ | |
115 | struct gs_buf { | |
116 | unsigned int buf_size; | |
117 | char *buf_buf; | |
118 | char *buf_get; | |
119 | char *buf_put; | |
120 | }; | |
121 | ||
122 | /* list of requests */ | |
123 | struct gs_req_entry { | |
124 | struct list_head re_entry; | |
125 | struct usb_request *re_req; | |
126 | }; | |
127 | ||
128 | /* the port structure holds info for each port, one for each minor number */ | |
129 | struct gs_port { | |
51a0e85c | 130 | struct gs_dev *port_dev; /* pointer to device struct */ |
1da177e4 LT |
131 | struct tty_struct *port_tty; /* pointer to tty struct */ |
132 | spinlock_t port_lock; | |
51a0e85c | 133 | int port_num; |
1da177e4 LT |
134 | int port_open_count; |
135 | int port_in_use; /* open/close in progress */ | |
136 | wait_queue_head_t port_write_wait;/* waiting to write */ | |
137 | struct gs_buf *port_write_buf; | |
138 | struct usb_cdc_line_coding port_line_coding; | |
139 | }; | |
140 | ||
141 | /* the device structure holds info for the USB device */ | |
142 | struct gs_dev { | |
143 | struct usb_gadget *dev_gadget; /* gadget device pointer */ | |
144 | spinlock_t dev_lock; /* lock for set/reset config */ | |
145 | int dev_config; /* configuration number */ | |
146 | struct usb_ep *dev_notify_ep; /* address of notify endpoint */ | |
147 | struct usb_ep *dev_in_ep; /* address of in endpoint */ | |
148 | struct usb_ep *dev_out_ep; /* address of out endpoint */ | |
093cf723 | 149 | struct usb_endpoint_descriptor /* descriptor of notify ep */ |
1da177e4 LT |
150 | *dev_notify_ep_desc; |
151 | struct usb_endpoint_descriptor /* descriptor of in endpoint */ | |
152 | *dev_in_ep_desc; | |
153 | struct usb_endpoint_descriptor /* descriptor of out endpoint */ | |
154 | *dev_out_ep_desc; | |
155 | struct usb_request *dev_ctrl_req; /* control request */ | |
156 | struct list_head dev_req_list; /* list of write requests */ | |
157 | int dev_sched_port; /* round robin port scheduled */ | |
158 | struct gs_port *dev_port[GS_NUM_PORTS]; /* the ports */ | |
159 | }; | |
160 | ||
161 | ||
162 | /* Functions */ | |
163 | ||
164 | /* module */ | |
165 | static int __init gs_module_init(void); | |
166 | static void __exit gs_module_exit(void); | |
167 | ||
168 | /* tty driver */ | |
169 | static int gs_open(struct tty_struct *tty, struct file *file); | |
170 | static void gs_close(struct tty_struct *tty, struct file *file); | |
51a0e85c | 171 | static int gs_write(struct tty_struct *tty, |
1da177e4 LT |
172 | const unsigned char *buf, int count); |
173 | static void gs_put_char(struct tty_struct *tty, unsigned char ch); | |
174 | static void gs_flush_chars(struct tty_struct *tty); | |
175 | static int gs_write_room(struct tty_struct *tty); | |
176 | static int gs_chars_in_buffer(struct tty_struct *tty); | |
177 | static void gs_throttle(struct tty_struct * tty); | |
178 | static void gs_unthrottle(struct tty_struct * tty); | |
179 | static void gs_break(struct tty_struct *tty, int break_state); | |
180 | static int gs_ioctl(struct tty_struct *tty, struct file *file, | |
181 | unsigned int cmd, unsigned long arg); | |
606d099c | 182 | static void gs_set_termios(struct tty_struct *tty, struct ktermios *old); |
1da177e4 LT |
183 | |
184 | static int gs_send(struct gs_dev *dev); | |
185 | static int gs_send_packet(struct gs_dev *dev, char *packet, | |
186 | unsigned int size); | |
187 | static int gs_recv_packet(struct gs_dev *dev, char *packet, | |
188 | unsigned int size); | |
189 | static void gs_read_complete(struct usb_ep *ep, struct usb_request *req); | |
190 | static void gs_write_complete(struct usb_ep *ep, struct usb_request *req); | |
191 | ||
192 | /* gadget driver */ | |
193 | static int gs_bind(struct usb_gadget *gadget); | |
194 | static void gs_unbind(struct usb_gadget *gadget); | |
195 | static int gs_setup(struct usb_gadget *gadget, | |
196 | const struct usb_ctrlrequest *ctrl); | |
197 | static int gs_setup_standard(struct usb_gadget *gadget, | |
198 | const struct usb_ctrlrequest *ctrl); | |
199 | static int gs_setup_class(struct usb_gadget *gadget, | |
200 | const struct usb_ctrlrequest *ctrl); | |
201 | static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req); | |
202 | static void gs_disconnect(struct usb_gadget *gadget); | |
203 | static int gs_set_config(struct gs_dev *dev, unsigned config); | |
204 | static void gs_reset_config(struct gs_dev *dev); | |
51a0e85c | 205 | static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, |
1da177e4 LT |
206 | u8 type, unsigned int index, int is_otg); |
207 | ||
208 | static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len, | |
55016f10 | 209 | gfp_t kmalloc_flags); |
1da177e4 LT |
210 | static void gs_free_req(struct usb_ep *ep, struct usb_request *req); |
211 | ||
212 | static struct gs_req_entry *gs_alloc_req_entry(struct usb_ep *ep, unsigned len, | |
55016f10 | 213 | gfp_t kmalloc_flags); |
1da177e4 LT |
214 | static void gs_free_req_entry(struct usb_ep *ep, struct gs_req_entry *req); |
215 | ||
55016f10 | 216 | static int gs_alloc_ports(struct gs_dev *dev, gfp_t kmalloc_flags); |
1da177e4 LT |
217 | static void gs_free_ports(struct gs_dev *dev); |
218 | ||
219 | /* circular buffer */ | |
55016f10 | 220 | static struct gs_buf *gs_buf_alloc(unsigned int size, gfp_t kmalloc_flags); |
1da177e4 LT |
221 | static void gs_buf_free(struct gs_buf *gb); |
222 | static void gs_buf_clear(struct gs_buf *gb); | |
223 | static unsigned int gs_buf_data_avail(struct gs_buf *gb); | |
224 | static unsigned int gs_buf_space_avail(struct gs_buf *gb); | |
225 | static unsigned int gs_buf_put(struct gs_buf *gb, const char *buf, | |
226 | unsigned int count); | |
227 | static unsigned int gs_buf_get(struct gs_buf *gb, char *buf, | |
228 | unsigned int count); | |
229 | ||
230 | /* external functions */ | |
231 | extern int net2280_set_fifo_mode(struct usb_gadget *gadget, int mode); | |
232 | ||
233 | ||
234 | /* Globals */ | |
235 | ||
236 | static struct gs_dev *gs_device; | |
237 | ||
238 | static const char *EP_IN_NAME; | |
239 | static const char *EP_OUT_NAME; | |
240 | static const char *EP_NOTIFY_NAME; | |
241 | ||
831c70fc | 242 | static struct mutex gs_open_close_lock[GS_NUM_PORTS]; |
1da177e4 LT |
243 | |
244 | static unsigned int read_q_size = GS_DEFAULT_READ_Q_SIZE; | |
245 | static unsigned int write_q_size = GS_DEFAULT_WRITE_Q_SIZE; | |
246 | ||
247 | static unsigned int write_buf_size = GS_DEFAULT_WRITE_BUF_SIZE; | |
248 | ||
249 | static unsigned int use_acm = GS_DEFAULT_USE_ACM; | |
250 | ||
251 | ||
252 | /* tty driver struct */ | |
b68e31d0 | 253 | static const struct tty_operations gs_tty_ops = { |
1da177e4 LT |
254 | .open = gs_open, |
255 | .close = gs_close, | |
256 | .write = gs_write, | |
257 | .put_char = gs_put_char, | |
258 | .flush_chars = gs_flush_chars, | |
259 | .write_room = gs_write_room, | |
260 | .ioctl = gs_ioctl, | |
261 | .set_termios = gs_set_termios, | |
262 | .throttle = gs_throttle, | |
263 | .unthrottle = gs_unthrottle, | |
264 | .break_ctl = gs_break, | |
265 | .chars_in_buffer = gs_chars_in_buffer, | |
266 | }; | |
267 | static struct tty_driver *gs_tty_driver; | |
268 | ||
269 | /* gadget driver struct */ | |
270 | static struct usb_gadget_driver gs_gadget_driver = { | |
271 | #ifdef CONFIG_USB_GADGET_DUALSPEED | |
272 | .speed = USB_SPEED_HIGH, | |
273 | #else | |
274 | .speed = USB_SPEED_FULL, | |
275 | #endif /* CONFIG_USB_GADGET_DUALSPEED */ | |
276 | .function = GS_LONG_NAME, | |
277 | .bind = gs_bind, | |
6bea476c | 278 | .unbind = gs_unbind, |
1da177e4 LT |
279 | .setup = gs_setup, |
280 | .disconnect = gs_disconnect, | |
281 | .driver = { | |
282 | .name = GS_SHORT_NAME, | |
1da177e4 LT |
283 | }, |
284 | }; | |
285 | ||
286 | ||
287 | /* USB descriptors */ | |
288 | ||
289 | #define GS_MANUFACTURER_STR_ID 1 | |
290 | #define GS_PRODUCT_STR_ID 2 | |
291 | #define GS_SERIAL_STR_ID 3 | |
292 | #define GS_BULK_CONFIG_STR_ID 4 | |
293 | #define GS_ACM_CONFIG_STR_ID 5 | |
294 | #define GS_CONTROL_STR_ID 6 | |
295 | #define GS_DATA_STR_ID 7 | |
296 | ||
297 | /* static strings, in UTF-8 */ | |
298 | static char manufacturer[50]; | |
299 | static struct usb_string gs_strings[] = { | |
300 | { GS_MANUFACTURER_STR_ID, manufacturer }, | |
301 | { GS_PRODUCT_STR_ID, GS_LONG_NAME }, | |
302 | { GS_SERIAL_STR_ID, "0" }, | |
303 | { GS_BULK_CONFIG_STR_ID, "Gadget Serial Bulk" }, | |
304 | { GS_ACM_CONFIG_STR_ID, "Gadget Serial CDC ACM" }, | |
305 | { GS_CONTROL_STR_ID, "Gadget Serial Control" }, | |
306 | { GS_DATA_STR_ID, "Gadget Serial Data" }, | |
307 | { } /* end of list */ | |
308 | }; | |
309 | ||
310 | static struct usb_gadget_strings gs_string_table = { | |
311 | .language = 0x0409, /* en-us */ | |
312 | .strings = gs_strings, | |
313 | }; | |
314 | ||
315 | static struct usb_device_descriptor gs_device_desc = { | |
316 | .bLength = USB_DT_DEVICE_SIZE, | |
317 | .bDescriptorType = USB_DT_DEVICE, | |
318 | .bcdUSB = __constant_cpu_to_le16(0x0200), | |
319 | .bDeviceSubClass = 0, | |
320 | .bDeviceProtocol = 0, | |
321 | .idVendor = __constant_cpu_to_le16(GS_VENDOR_ID), | |
322 | .idProduct = __constant_cpu_to_le16(GS_PRODUCT_ID), | |
323 | .iManufacturer = GS_MANUFACTURER_STR_ID, | |
324 | .iProduct = GS_PRODUCT_STR_ID, | |
325 | .iSerialNumber = GS_SERIAL_STR_ID, | |
326 | .bNumConfigurations = GS_NUM_CONFIGS, | |
327 | }; | |
328 | ||
329 | static struct usb_otg_descriptor gs_otg_descriptor = { | |
330 | .bLength = sizeof(gs_otg_descriptor), | |
331 | .bDescriptorType = USB_DT_OTG, | |
332 | .bmAttributes = USB_OTG_SRP, | |
333 | }; | |
334 | ||
335 | static struct usb_config_descriptor gs_bulk_config_desc = { | |
336 | .bLength = USB_DT_CONFIG_SIZE, | |
337 | .bDescriptorType = USB_DT_CONFIG, | |
338 | /* .wTotalLength computed dynamically */ | |
339 | .bNumInterfaces = 1, | |
340 | .bConfigurationValue = GS_BULK_CONFIG_ID, | |
341 | .iConfiguration = GS_BULK_CONFIG_STR_ID, | |
342 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, | |
343 | .bMaxPower = 1, | |
344 | }; | |
345 | ||
346 | static struct usb_config_descriptor gs_acm_config_desc = { | |
347 | .bLength = USB_DT_CONFIG_SIZE, | |
348 | .bDescriptorType = USB_DT_CONFIG, | |
349 | /* .wTotalLength computed dynamically */ | |
350 | .bNumInterfaces = 2, | |
351 | .bConfigurationValue = GS_ACM_CONFIG_ID, | |
352 | .iConfiguration = GS_ACM_CONFIG_STR_ID, | |
353 | .bmAttributes = USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER, | |
354 | .bMaxPower = 1, | |
355 | }; | |
356 | ||
357 | static const struct usb_interface_descriptor gs_bulk_interface_desc = { | |
358 | .bLength = USB_DT_INTERFACE_SIZE, | |
359 | .bDescriptorType = USB_DT_INTERFACE, | |
360 | .bInterfaceNumber = GS_BULK_INTERFACE_ID, | |
361 | .bNumEndpoints = 2, | |
362 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
363 | .bInterfaceSubClass = 0, | |
364 | .bInterfaceProtocol = 0, | |
365 | .iInterface = GS_DATA_STR_ID, | |
366 | }; | |
367 | ||
368 | static const struct usb_interface_descriptor gs_control_interface_desc = { | |
369 | .bLength = USB_DT_INTERFACE_SIZE, | |
370 | .bDescriptorType = USB_DT_INTERFACE, | |
371 | .bInterfaceNumber = GS_CONTROL_INTERFACE_ID, | |
372 | .bNumEndpoints = 1, | |
373 | .bInterfaceClass = USB_CLASS_COMM, | |
374 | .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, | |
375 | .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER, | |
376 | .iInterface = GS_CONTROL_STR_ID, | |
377 | }; | |
378 | ||
379 | static const struct usb_interface_descriptor gs_data_interface_desc = { | |
380 | .bLength = USB_DT_INTERFACE_SIZE, | |
381 | .bDescriptorType = USB_DT_INTERFACE, | |
382 | .bInterfaceNumber = GS_DATA_INTERFACE_ID, | |
383 | .bNumEndpoints = 2, | |
384 | .bInterfaceClass = USB_CLASS_CDC_DATA, | |
385 | .bInterfaceSubClass = 0, | |
386 | .bInterfaceProtocol = 0, | |
387 | .iInterface = GS_DATA_STR_ID, | |
388 | }; | |
389 | ||
390 | static const struct usb_cdc_header_desc gs_header_desc = { | |
391 | .bLength = sizeof(gs_header_desc), | |
392 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
393 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, | |
394 | .bcdCDC = __constant_cpu_to_le16(0x0110), | |
395 | }; | |
396 | ||
397 | static const struct usb_cdc_call_mgmt_descriptor gs_call_mgmt_descriptor = { | |
51a0e85c DB |
398 | .bLength = sizeof(gs_call_mgmt_descriptor), |
399 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
400 | .bDescriptorSubType = USB_CDC_CALL_MANAGEMENT_TYPE, | |
401 | .bmCapabilities = 0, | |
402 | .bDataInterface = 1, /* index of data interface */ | |
1da177e4 LT |
403 | }; |
404 | ||
405 | static struct usb_cdc_acm_descriptor gs_acm_descriptor = { | |
51a0e85c DB |
406 | .bLength = sizeof(gs_acm_descriptor), |
407 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
408 | .bDescriptorSubType = USB_CDC_ACM_TYPE, | |
409 | .bmCapabilities = 0, | |
1da177e4 LT |
410 | }; |
411 | ||
412 | static const struct usb_cdc_union_desc gs_union_desc = { | |
413 | .bLength = sizeof(gs_union_desc), | |
414 | .bDescriptorType = USB_DT_CS_INTERFACE, | |
415 | .bDescriptorSubType = USB_CDC_UNION_TYPE, | |
416 | .bMasterInterface0 = 0, /* index of control interface */ | |
417 | .bSlaveInterface0 = 1, /* index of data interface */ | |
418 | }; | |
51a0e85c | 419 | |
1da177e4 LT |
420 | static struct usb_endpoint_descriptor gs_fullspeed_notify_desc = { |
421 | .bLength = USB_DT_ENDPOINT_SIZE, | |
422 | .bDescriptorType = USB_DT_ENDPOINT, | |
423 | .bEndpointAddress = USB_DIR_IN, | |
424 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
425 | .wMaxPacketSize = __constant_cpu_to_le16(GS_NOTIFY_MAXPACKET), | |
426 | .bInterval = 1 << GS_LOG2_NOTIFY_INTERVAL, | |
427 | }; | |
428 | ||
429 | static struct usb_endpoint_descriptor gs_fullspeed_in_desc = { | |
430 | .bLength = USB_DT_ENDPOINT_SIZE, | |
431 | .bDescriptorType = USB_DT_ENDPOINT, | |
432 | .bEndpointAddress = USB_DIR_IN, | |
433 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
434 | }; | |
435 | ||
436 | static struct usb_endpoint_descriptor gs_fullspeed_out_desc = { | |
437 | .bLength = USB_DT_ENDPOINT_SIZE, | |
438 | .bDescriptorType = USB_DT_ENDPOINT, | |
439 | .bEndpointAddress = USB_DIR_OUT, | |
440 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
441 | }; | |
442 | ||
443 | static const struct usb_descriptor_header *gs_bulk_fullspeed_function[] = { | |
444 | (struct usb_descriptor_header *) &gs_otg_descriptor, | |
445 | (struct usb_descriptor_header *) &gs_bulk_interface_desc, | |
446 | (struct usb_descriptor_header *) &gs_fullspeed_in_desc, | |
447 | (struct usb_descriptor_header *) &gs_fullspeed_out_desc, | |
448 | NULL, | |
449 | }; | |
450 | ||
451 | static const struct usb_descriptor_header *gs_acm_fullspeed_function[] = { | |
452 | (struct usb_descriptor_header *) &gs_otg_descriptor, | |
453 | (struct usb_descriptor_header *) &gs_control_interface_desc, | |
454 | (struct usb_descriptor_header *) &gs_header_desc, | |
455 | (struct usb_descriptor_header *) &gs_call_mgmt_descriptor, | |
456 | (struct usb_descriptor_header *) &gs_acm_descriptor, | |
457 | (struct usb_descriptor_header *) &gs_union_desc, | |
458 | (struct usb_descriptor_header *) &gs_fullspeed_notify_desc, | |
459 | (struct usb_descriptor_header *) &gs_data_interface_desc, | |
460 | (struct usb_descriptor_header *) &gs_fullspeed_in_desc, | |
461 | (struct usb_descriptor_header *) &gs_fullspeed_out_desc, | |
462 | NULL, | |
463 | }; | |
464 | ||
1da177e4 LT |
465 | static struct usb_endpoint_descriptor gs_highspeed_notify_desc = { |
466 | .bLength = USB_DT_ENDPOINT_SIZE, | |
467 | .bDescriptorType = USB_DT_ENDPOINT, | |
468 | .bEndpointAddress = USB_DIR_IN, | |
469 | .bmAttributes = USB_ENDPOINT_XFER_INT, | |
470 | .wMaxPacketSize = __constant_cpu_to_le16(GS_NOTIFY_MAXPACKET), | |
471 | .bInterval = GS_LOG2_NOTIFY_INTERVAL+4, | |
472 | }; | |
473 | ||
474 | static struct usb_endpoint_descriptor gs_highspeed_in_desc = { | |
475 | .bLength = USB_DT_ENDPOINT_SIZE, | |
476 | .bDescriptorType = USB_DT_ENDPOINT, | |
477 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
478 | .wMaxPacketSize = __constant_cpu_to_le16(512), | |
479 | }; | |
480 | ||
481 | static struct usb_endpoint_descriptor gs_highspeed_out_desc = { | |
482 | .bLength = USB_DT_ENDPOINT_SIZE, | |
483 | .bDescriptorType = USB_DT_ENDPOINT, | |
484 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
485 | .wMaxPacketSize = __constant_cpu_to_le16(512), | |
486 | }; | |
487 | ||
488 | static struct usb_qualifier_descriptor gs_qualifier_desc = { | |
489 | .bLength = sizeof(struct usb_qualifier_descriptor), | |
490 | .bDescriptorType = USB_DT_DEVICE_QUALIFIER, | |
491 | .bcdUSB = __constant_cpu_to_le16 (0x0200), | |
492 | /* assumes ep0 uses the same value for both speeds ... */ | |
493 | .bNumConfigurations = GS_NUM_CONFIGS, | |
494 | }; | |
495 | ||
496 | static const struct usb_descriptor_header *gs_bulk_highspeed_function[] = { | |
497 | (struct usb_descriptor_header *) &gs_otg_descriptor, | |
498 | (struct usb_descriptor_header *) &gs_bulk_interface_desc, | |
499 | (struct usb_descriptor_header *) &gs_highspeed_in_desc, | |
500 | (struct usb_descriptor_header *) &gs_highspeed_out_desc, | |
501 | NULL, | |
502 | }; | |
503 | ||
504 | static const struct usb_descriptor_header *gs_acm_highspeed_function[] = { | |
505 | (struct usb_descriptor_header *) &gs_otg_descriptor, | |
506 | (struct usb_descriptor_header *) &gs_control_interface_desc, | |
507 | (struct usb_descriptor_header *) &gs_header_desc, | |
508 | (struct usb_descriptor_header *) &gs_call_mgmt_descriptor, | |
509 | (struct usb_descriptor_header *) &gs_acm_descriptor, | |
510 | (struct usb_descriptor_header *) &gs_union_desc, | |
511 | (struct usb_descriptor_header *) &gs_highspeed_notify_desc, | |
512 | (struct usb_descriptor_header *) &gs_data_interface_desc, | |
513 | (struct usb_descriptor_header *) &gs_highspeed_in_desc, | |
514 | (struct usb_descriptor_header *) &gs_highspeed_out_desc, | |
515 | NULL, | |
516 | }; | |
517 | ||
1da177e4 LT |
518 | |
519 | /* Module */ | |
520 | MODULE_DESCRIPTION(GS_LONG_NAME); | |
521 | MODULE_AUTHOR("Al Borchers"); | |
522 | MODULE_LICENSE("GPL"); | |
523 | ||
51a0e85c | 524 | #ifdef DEBUG |
1da177e4 LT |
525 | module_param(debug, int, S_IRUGO|S_IWUSR); |
526 | MODULE_PARM_DESC(debug, "Enable debugging, 0=off, 1=on"); | |
527 | #endif | |
528 | ||
529 | module_param(read_q_size, uint, S_IRUGO); | |
530 | MODULE_PARM_DESC(read_q_size, "Read request queue size, default=32"); | |
531 | ||
532 | module_param(write_q_size, uint, S_IRUGO); | |
533 | MODULE_PARM_DESC(write_q_size, "Write request queue size, default=32"); | |
534 | ||
535 | module_param(write_buf_size, uint, S_IRUGO); | |
536 | MODULE_PARM_DESC(write_buf_size, "Write buffer size, default=8192"); | |
537 | ||
538 | module_param(use_acm, uint, S_IRUGO); | |
539 | MODULE_PARM_DESC(use_acm, "Use CDC ACM, 0=no, 1=yes, default=no"); | |
540 | ||
541 | module_init(gs_module_init); | |
542 | module_exit(gs_module_exit); | |
543 | ||
544 | /* | |
545 | * gs_module_init | |
546 | * | |
547 | * Register as a USB gadget driver and a tty driver. | |
548 | */ | |
549 | static int __init gs_module_init(void) | |
550 | { | |
551 | int i; | |
552 | int retval; | |
553 | ||
554 | retval = usb_gadget_register_driver(&gs_gadget_driver); | |
555 | if (retval) { | |
556 | printk(KERN_ERR "gs_module_init: cannot register gadget driver, ret=%d\n", retval); | |
557 | return retval; | |
558 | } | |
559 | ||
560 | gs_tty_driver = alloc_tty_driver(GS_NUM_PORTS); | |
561 | if (!gs_tty_driver) | |
562 | return -ENOMEM; | |
563 | gs_tty_driver->owner = THIS_MODULE; | |
564 | gs_tty_driver->driver_name = GS_SHORT_NAME; | |
565 | gs_tty_driver->name = "ttygs"; | |
1da177e4 LT |
566 | gs_tty_driver->major = GS_MAJOR; |
567 | gs_tty_driver->minor_start = GS_MINOR_START; | |
568 | gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
569 | gs_tty_driver->subtype = SERIAL_TYPE_NORMAL; | |
331b8319 | 570 | gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
1da177e4 LT |
571 | gs_tty_driver->init_termios = tty_std_termios; |
572 | gs_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
573 | tty_set_operations(gs_tty_driver, &gs_tty_ops); | |
574 | ||
575 | for (i=0; i < GS_NUM_PORTS; i++) | |
831c70fc | 576 | mutex_init(&gs_open_close_lock[i]); |
1da177e4 LT |
577 | |
578 | retval = tty_register_driver(gs_tty_driver); | |
579 | if (retval) { | |
580 | usb_gadget_unregister_driver(&gs_gadget_driver); | |
581 | put_tty_driver(gs_tty_driver); | |
582 | printk(KERN_ERR "gs_module_init: cannot register tty driver, ret=%d\n", retval); | |
583 | return retval; | |
584 | } | |
585 | ||
586 | printk(KERN_INFO "gs_module_init: %s %s loaded\n", GS_LONG_NAME, GS_VERSION_STR); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | /* | |
591 | * gs_module_exit | |
592 | * | |
593 | * Unregister as a tty driver and a USB gadget driver. | |
594 | */ | |
595 | static void __exit gs_module_exit(void) | |
596 | { | |
597 | tty_unregister_driver(gs_tty_driver); | |
598 | put_tty_driver(gs_tty_driver); | |
599 | usb_gadget_unregister_driver(&gs_gadget_driver); | |
600 | ||
601 | printk(KERN_INFO "gs_module_exit: %s %s unloaded\n", GS_LONG_NAME, GS_VERSION_STR); | |
602 | } | |
603 | ||
604 | /* TTY Driver */ | |
605 | ||
606 | /* | |
607 | * gs_open | |
608 | */ | |
609 | static int gs_open(struct tty_struct *tty, struct file *file) | |
610 | { | |
611 | int port_num; | |
612 | unsigned long flags; | |
613 | struct gs_port *port; | |
614 | struct gs_dev *dev; | |
615 | struct gs_buf *buf; | |
831c70fc | 616 | struct mutex *mtx; |
1da177e4 LT |
617 | int ret; |
618 | ||
619 | port_num = tty->index; | |
620 | ||
621 | gs_debug("gs_open: (%d,%p,%p)\n", port_num, tty, file); | |
622 | ||
623 | if (port_num < 0 || port_num >= GS_NUM_PORTS) { | |
624 | printk(KERN_ERR "gs_open: (%d,%p,%p) invalid port number\n", | |
625 | port_num, tty, file); | |
626 | return -ENODEV; | |
627 | } | |
628 | ||
629 | dev = gs_device; | |
630 | ||
631 | if (dev == NULL) { | |
632 | printk(KERN_ERR "gs_open: (%d,%p,%p) NULL device pointer\n", | |
633 | port_num, tty, file); | |
634 | return -ENODEV; | |
635 | } | |
636 | ||
831c70fc MK |
637 | mtx = &gs_open_close_lock[port_num]; |
638 | if (mutex_lock_interruptible(mtx)) { | |
1da177e4 | 639 | printk(KERN_ERR |
831c70fc | 640 | "gs_open: (%d,%p,%p) interrupted waiting for mutex\n", |
1da177e4 LT |
641 | port_num, tty, file); |
642 | return -ERESTARTSYS; | |
643 | } | |
644 | ||
645 | spin_lock_irqsave(&dev->dev_lock, flags); | |
646 | ||
647 | if (dev->dev_config == GS_NO_CONFIG_ID) { | |
648 | printk(KERN_ERR | |
649 | "gs_open: (%d,%p,%p) device is not connected\n", | |
650 | port_num, tty, file); | |
651 | ret = -ENODEV; | |
652 | goto exit_unlock_dev; | |
653 | } | |
654 | ||
655 | port = dev->dev_port[port_num]; | |
656 | ||
657 | if (port == NULL) { | |
658 | printk(KERN_ERR "gs_open: (%d,%p,%p) NULL port pointer\n", | |
659 | port_num, tty, file); | |
660 | ret = -ENODEV; | |
661 | goto exit_unlock_dev; | |
662 | } | |
663 | ||
664 | spin_lock(&port->port_lock); | |
665 | spin_unlock(&dev->dev_lock); | |
666 | ||
667 | if (port->port_dev == NULL) { | |
668 | printk(KERN_ERR "gs_open: (%d,%p,%p) port disconnected (1)\n", | |
669 | port_num, tty, file); | |
670 | ret = -EIO; | |
671 | goto exit_unlock_port; | |
672 | } | |
673 | ||
674 | if (port->port_open_count > 0) { | |
675 | ++port->port_open_count; | |
676 | gs_debug("gs_open: (%d,%p,%p) already open\n", | |
677 | port_num, tty, file); | |
678 | ret = 0; | |
679 | goto exit_unlock_port; | |
680 | } | |
681 | ||
682 | tty->driver_data = NULL; | |
683 | ||
684 | /* mark port as in use, we can drop port lock and sleep if necessary */ | |
685 | port->port_in_use = 1; | |
686 | ||
687 | /* allocate write buffer on first open */ | |
688 | if (port->port_write_buf == NULL) { | |
689 | spin_unlock_irqrestore(&port->port_lock, flags); | |
690 | buf = gs_buf_alloc(write_buf_size, GFP_KERNEL); | |
691 | spin_lock_irqsave(&port->port_lock, flags); | |
692 | ||
693 | /* might have been disconnected while asleep, check */ | |
694 | if (port->port_dev == NULL) { | |
695 | printk(KERN_ERR | |
696 | "gs_open: (%d,%p,%p) port disconnected (2)\n", | |
697 | port_num, tty, file); | |
698 | port->port_in_use = 0; | |
699 | ret = -EIO; | |
700 | goto exit_unlock_port; | |
701 | } | |
702 | ||
703 | if ((port->port_write_buf=buf) == NULL) { | |
704 | printk(KERN_ERR "gs_open: (%d,%p,%p) cannot allocate port write buffer\n", | |
705 | port_num, tty, file); | |
706 | port->port_in_use = 0; | |
707 | ret = -ENOMEM; | |
708 | goto exit_unlock_port; | |
709 | } | |
710 | ||
711 | } | |
712 | ||
713 | /* wait for carrier detect (not implemented) */ | |
714 | ||
715 | /* might have been disconnected while asleep, check */ | |
716 | if (port->port_dev == NULL) { | |
717 | printk(KERN_ERR "gs_open: (%d,%p,%p) port disconnected (3)\n", | |
718 | port_num, tty, file); | |
719 | port->port_in_use = 0; | |
720 | ret = -EIO; | |
721 | goto exit_unlock_port; | |
722 | } | |
723 | ||
724 | tty->driver_data = port; | |
725 | port->port_tty = tty; | |
726 | port->port_open_count = 1; | |
727 | port->port_in_use = 0; | |
728 | ||
729 | gs_debug("gs_open: (%d,%p,%p) completed\n", port_num, tty, file); | |
730 | ||
731 | ret = 0; | |
732 | ||
733 | exit_unlock_port: | |
734 | spin_unlock_irqrestore(&port->port_lock, flags); | |
831c70fc | 735 | mutex_unlock(mtx); |
1da177e4 LT |
736 | return ret; |
737 | ||
738 | exit_unlock_dev: | |
739 | spin_unlock_irqrestore(&dev->dev_lock, flags); | |
831c70fc | 740 | mutex_unlock(mtx); |
1da177e4 LT |
741 | return ret; |
742 | ||
743 | } | |
744 | ||
745 | /* | |
746 | * gs_close | |
747 | */ | |
943e1b4d FBH |
748 | |
749 | #define GS_WRITE_FINISHED_EVENT_SAFELY(p) \ | |
750 | ({ \ | |
943e1b4d FBH |
751 | int cond; \ |
752 | \ | |
ca094f11 | 753 | spin_lock_irq(&(p)->port_lock); \ |
943e1b4d | 754 | cond = !(p)->port_dev || !gs_buf_data_avail((p)->port_write_buf); \ |
ca094f11 | 755 | spin_unlock_irq(&(p)->port_lock); \ |
943e1b4d FBH |
756 | cond; \ |
757 | }) | |
758 | ||
1da177e4 LT |
759 | static void gs_close(struct tty_struct *tty, struct file *file) |
760 | { | |
1da177e4 | 761 | struct gs_port *port = tty->driver_data; |
831c70fc | 762 | struct mutex *mtx; |
1da177e4 LT |
763 | |
764 | if (port == NULL) { | |
765 | printk(KERN_ERR "gs_close: NULL port pointer\n"); | |
766 | return; | |
767 | } | |
768 | ||
769 | gs_debug("gs_close: (%d,%p,%p)\n", port->port_num, tty, file); | |
770 | ||
831c70fc MK |
771 | mtx = &gs_open_close_lock[port->port_num]; |
772 | mutex_lock(mtx); | |
1da177e4 | 773 | |
ca094f11 | 774 | spin_lock_irq(&port->port_lock); |
1da177e4 LT |
775 | |
776 | if (port->port_open_count == 0) { | |
777 | printk(KERN_ERR | |
778 | "gs_close: (%d,%p,%p) port is already closed\n", | |
779 | port->port_num, tty, file); | |
780 | goto exit; | |
781 | } | |
782 | ||
783 | if (port->port_open_count > 1) { | |
784 | --port->port_open_count; | |
785 | goto exit; | |
786 | } | |
787 | ||
788 | /* free disconnected port on final close */ | |
789 | if (port->port_dev == NULL) { | |
790 | kfree(port); | |
791 | goto exit; | |
792 | } | |
793 | ||
794 | /* mark port as closed but in use, we can drop port lock */ | |
795 | /* and sleep if necessary */ | |
796 | port->port_in_use = 1; | |
797 | port->port_open_count = 0; | |
798 | ||
799 | /* wait for write buffer to drain, or */ | |
800 | /* at most GS_CLOSE_TIMEOUT seconds */ | |
801 | if (gs_buf_data_avail(port->port_write_buf) > 0) { | |
ca094f11 | 802 | spin_unlock_irq(&port->port_lock); |
943e1b4d FBH |
803 | wait_event_interruptible_timeout(port->port_write_wait, |
804 | GS_WRITE_FINISHED_EVENT_SAFELY(port), | |
805 | GS_CLOSE_TIMEOUT * HZ); | |
ca094f11 | 806 | spin_lock_irq(&port->port_lock); |
1da177e4 LT |
807 | } |
808 | ||
809 | /* free disconnected port on final close */ | |
810 | /* (might have happened during the above sleep) */ | |
811 | if (port->port_dev == NULL) { | |
812 | kfree(port); | |
813 | goto exit; | |
814 | } | |
815 | ||
816 | gs_buf_clear(port->port_write_buf); | |
817 | ||
818 | tty->driver_data = NULL; | |
819 | port->port_tty = NULL; | |
820 | port->port_in_use = 0; | |
821 | ||
822 | gs_debug("gs_close: (%d,%p,%p) completed\n", | |
823 | port->port_num, tty, file); | |
824 | ||
825 | exit: | |
ca094f11 | 826 | spin_unlock_irq(&port->port_lock); |
831c70fc | 827 | mutex_unlock(mtx); |
1da177e4 LT |
828 | } |
829 | ||
830 | /* | |
831 | * gs_write | |
832 | */ | |
833 | static int gs_write(struct tty_struct *tty, const unsigned char *buf, int count) | |
834 | { | |
835 | unsigned long flags; | |
836 | struct gs_port *port = tty->driver_data; | |
837 | int ret; | |
838 | ||
839 | if (port == NULL) { | |
840 | printk(KERN_ERR "gs_write: NULL port pointer\n"); | |
841 | return -EIO; | |
842 | } | |
843 | ||
844 | gs_debug("gs_write: (%d,%p) writing %d bytes\n", port->port_num, tty, | |
845 | count); | |
846 | ||
847 | if (count == 0) | |
848 | return 0; | |
849 | ||
850 | spin_lock_irqsave(&port->port_lock, flags); | |
851 | ||
852 | if (port->port_dev == NULL) { | |
853 | printk(KERN_ERR "gs_write: (%d,%p) port is not connected\n", | |
854 | port->port_num, tty); | |
855 | ret = -EIO; | |
856 | goto exit; | |
857 | } | |
858 | ||
859 | if (port->port_open_count == 0) { | |
860 | printk(KERN_ERR "gs_write: (%d,%p) port is closed\n", | |
861 | port->port_num, tty); | |
862 | ret = -EBADF; | |
863 | goto exit; | |
864 | } | |
865 | ||
866 | count = gs_buf_put(port->port_write_buf, buf, count); | |
867 | ||
868 | spin_unlock_irqrestore(&port->port_lock, flags); | |
869 | ||
870 | gs_send(gs_device); | |
871 | ||
872 | gs_debug("gs_write: (%d,%p) wrote %d bytes\n", port->port_num, tty, | |
873 | count); | |
874 | ||
875 | return count; | |
876 | ||
877 | exit: | |
878 | spin_unlock_irqrestore(&port->port_lock, flags); | |
879 | return ret; | |
880 | } | |
881 | ||
882 | /* | |
883 | * gs_put_char | |
884 | */ | |
885 | static void gs_put_char(struct tty_struct *tty, unsigned char ch) | |
886 | { | |
887 | unsigned long flags; | |
888 | struct gs_port *port = tty->driver_data; | |
889 | ||
890 | if (port == NULL) { | |
891 | printk(KERN_ERR "gs_put_char: NULL port pointer\n"); | |
892 | return; | |
893 | } | |
894 | ||
51a0e85c DB |
895 | gs_debug("gs_put_char: (%d,%p) char=0x%x, called from %p\n", |
896 | port->port_num, tty, ch, __builtin_return_address(0)); | |
1da177e4 LT |
897 | |
898 | spin_lock_irqsave(&port->port_lock, flags); | |
899 | ||
900 | if (port->port_dev == NULL) { | |
901 | printk(KERN_ERR "gs_put_char: (%d,%p) port is not connected\n", | |
902 | port->port_num, tty); | |
903 | goto exit; | |
904 | } | |
905 | ||
906 | if (port->port_open_count == 0) { | |
907 | printk(KERN_ERR "gs_put_char: (%d,%p) port is closed\n", | |
908 | port->port_num, tty); | |
909 | goto exit; | |
910 | } | |
911 | ||
912 | gs_buf_put(port->port_write_buf, &ch, 1); | |
913 | ||
914 | exit: | |
915 | spin_unlock_irqrestore(&port->port_lock, flags); | |
916 | } | |
917 | ||
918 | /* | |
919 | * gs_flush_chars | |
920 | */ | |
921 | static void gs_flush_chars(struct tty_struct *tty) | |
922 | { | |
923 | unsigned long flags; | |
924 | struct gs_port *port = tty->driver_data; | |
925 | ||
926 | if (port == NULL) { | |
927 | printk(KERN_ERR "gs_flush_chars: NULL port pointer\n"); | |
928 | return; | |
929 | } | |
930 | ||
931 | gs_debug("gs_flush_chars: (%d,%p)\n", port->port_num, tty); | |
932 | ||
933 | spin_lock_irqsave(&port->port_lock, flags); | |
934 | ||
935 | if (port->port_dev == NULL) { | |
936 | printk(KERN_ERR | |
937 | "gs_flush_chars: (%d,%p) port is not connected\n", | |
938 | port->port_num, tty); | |
939 | goto exit; | |
940 | } | |
941 | ||
942 | if (port->port_open_count == 0) { | |
943 | printk(KERN_ERR "gs_flush_chars: (%d,%p) port is closed\n", | |
944 | port->port_num, tty); | |
945 | goto exit; | |
946 | } | |
947 | ||
948 | spin_unlock_irqrestore(&port->port_lock, flags); | |
949 | ||
950 | gs_send(gs_device); | |
951 | ||
952 | return; | |
953 | ||
954 | exit: | |
955 | spin_unlock_irqrestore(&port->port_lock, flags); | |
956 | } | |
957 | ||
958 | /* | |
959 | * gs_write_room | |
960 | */ | |
961 | static int gs_write_room(struct tty_struct *tty) | |
962 | { | |
963 | ||
964 | int room = 0; | |
965 | unsigned long flags; | |
966 | struct gs_port *port = tty->driver_data; | |
967 | ||
968 | ||
969 | if (port == NULL) | |
970 | return 0; | |
971 | ||
972 | spin_lock_irqsave(&port->port_lock, flags); | |
973 | ||
974 | if (port->port_dev != NULL && port->port_open_count > 0 | |
975 | && port->port_write_buf != NULL) | |
976 | room = gs_buf_space_avail(port->port_write_buf); | |
977 | ||
978 | spin_unlock_irqrestore(&port->port_lock, flags); | |
979 | ||
980 | gs_debug("gs_write_room: (%d,%p) room=%d\n", | |
981 | port->port_num, tty, room); | |
982 | ||
983 | return room; | |
984 | } | |
985 | ||
986 | /* | |
987 | * gs_chars_in_buffer | |
988 | */ | |
989 | static int gs_chars_in_buffer(struct tty_struct *tty) | |
990 | { | |
991 | int chars = 0; | |
992 | unsigned long flags; | |
993 | struct gs_port *port = tty->driver_data; | |
994 | ||
995 | if (port == NULL) | |
996 | return 0; | |
997 | ||
998 | spin_lock_irqsave(&port->port_lock, flags); | |
999 | ||
1000 | if (port->port_dev != NULL && port->port_open_count > 0 | |
1001 | && port->port_write_buf != NULL) | |
1002 | chars = gs_buf_data_avail(port->port_write_buf); | |
1003 | ||
1004 | spin_unlock_irqrestore(&port->port_lock, flags); | |
1005 | ||
1006 | gs_debug("gs_chars_in_buffer: (%d,%p) chars=%d\n", | |
1007 | port->port_num, tty, chars); | |
1008 | ||
1009 | return chars; | |
1010 | } | |
1011 | ||
1012 | /* | |
1013 | * gs_throttle | |
1014 | */ | |
1015 | static void gs_throttle(struct tty_struct *tty) | |
1016 | { | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * gs_unthrottle | |
1021 | */ | |
1022 | static void gs_unthrottle(struct tty_struct *tty) | |
1023 | { | |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | * gs_break | |
1028 | */ | |
1029 | static void gs_break(struct tty_struct *tty, int break_state) | |
1030 | { | |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * gs_ioctl | |
1035 | */ | |
1036 | static int gs_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) | |
1037 | { | |
1038 | struct gs_port *port = tty->driver_data; | |
1039 | ||
1040 | if (port == NULL) { | |
1041 | printk(KERN_ERR "gs_ioctl: NULL port pointer\n"); | |
1042 | return -EIO; | |
1043 | } | |
1044 | ||
1045 | gs_debug("gs_ioctl: (%d,%p,%p) cmd=0x%4.4x, arg=%lu\n", | |
1046 | port->port_num, tty, file, cmd, arg); | |
1047 | ||
1048 | /* handle ioctls */ | |
1049 | ||
1050 | /* could not handle ioctl */ | |
1051 | return -ENOIOCTLCMD; | |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * gs_set_termios | |
1056 | */ | |
606d099c | 1057 | static void gs_set_termios(struct tty_struct *tty, struct ktermios *old) |
1da177e4 LT |
1058 | { |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * gs_send | |
1063 | * | |
1064 | * This function finds available write requests, calls | |
1065 | * gs_send_packet to fill these packets with data, and | |
1066 | * continues until either there are no more write requests | |
1067 | * available or no more data to send. This function is | |
1068 | * run whenever data arrives or write requests are available. | |
1069 | */ | |
1070 | static int gs_send(struct gs_dev *dev) | |
1071 | { | |
1072 | int ret,len; | |
1073 | unsigned long flags; | |
1074 | struct usb_ep *ep; | |
1075 | struct usb_request *req; | |
1076 | struct gs_req_entry *req_entry; | |
1077 | ||
1078 | if (dev == NULL) { | |
1079 | printk(KERN_ERR "gs_send: NULL device pointer\n"); | |
1080 | return -ENODEV; | |
1081 | } | |
1082 | ||
1083 | spin_lock_irqsave(&dev->dev_lock, flags); | |
1084 | ||
1085 | ep = dev->dev_in_ep; | |
1086 | ||
1087 | while(!list_empty(&dev->dev_req_list)) { | |
1088 | ||
1089 | req_entry = list_entry(dev->dev_req_list.next, | |
1090 | struct gs_req_entry, re_entry); | |
1091 | ||
1092 | req = req_entry->re_req; | |
1093 | ||
1094 | len = gs_send_packet(dev, req->buf, ep->maxpacket); | |
1095 | ||
1096 | if (len > 0) { | |
51a0e85c DB |
1097 | gs_debug_level(3, "gs_send: len=%d, 0x%2.2x " |
1098 | "0x%2.2x 0x%2.2x ...\n", len, | |
1099 | *((unsigned char *)req->buf), | |
1100 | *((unsigned char *)req->buf+1), | |
1101 | *((unsigned char *)req->buf+2)); | |
1da177e4 LT |
1102 | list_del(&req_entry->re_entry); |
1103 | req->length = len; | |
80f8af0c | 1104 | spin_unlock_irqrestore(&dev->dev_lock, flags); |
1da177e4 LT |
1105 | if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { |
1106 | printk(KERN_ERR | |
1107 | "gs_send: cannot queue read request, ret=%d\n", | |
1108 | ret); | |
80f8af0c | 1109 | spin_lock_irqsave(&dev->dev_lock, flags); |
1da177e4 LT |
1110 | break; |
1111 | } | |
80f8af0c | 1112 | spin_lock_irqsave(&dev->dev_lock, flags); |
1da177e4 LT |
1113 | } else { |
1114 | break; | |
1115 | } | |
1116 | ||
1117 | } | |
1118 | ||
1119 | spin_unlock_irqrestore(&dev->dev_lock, flags); | |
1120 | ||
1121 | return 0; | |
1122 | } | |
1123 | ||
1124 | /* | |
1125 | * gs_send_packet | |
1126 | * | |
1127 | * If there is data to send, a packet is built in the given | |
1128 | * buffer and the size is returned. If there is no data to | |
1129 | * send, 0 is returned. If there is any error a negative | |
1130 | * error number is returned. | |
1131 | * | |
1132 | * Called during USB completion routine, on interrupt time. | |
1133 | * | |
1134 | * We assume that disconnect will not happen until all completion | |
1135 | * routines have completed, so we can assume that the dev_port | |
1136 | * array does not change during the lifetime of this function. | |
1137 | */ | |
1138 | static int gs_send_packet(struct gs_dev *dev, char *packet, unsigned int size) | |
1139 | { | |
1140 | unsigned int len; | |
1141 | struct gs_port *port; | |
1142 | ||
1143 | /* TEMPORARY -- only port 0 is supported right now */ | |
1144 | port = dev->dev_port[0]; | |
1145 | ||
1146 | if (port == NULL) { | |
1147 | printk(KERN_ERR | |
1148 | "gs_send_packet: port=%d, NULL port pointer\n", | |
1149 | 0); | |
1150 | return -EIO; | |
1151 | } | |
1152 | ||
1153 | spin_lock(&port->port_lock); | |
1154 | ||
1155 | len = gs_buf_data_avail(port->port_write_buf); | |
1156 | if (len < size) | |
1157 | size = len; | |
1158 | ||
1159 | if (size == 0) | |
1160 | goto exit; | |
1161 | ||
1162 | size = gs_buf_get(port->port_write_buf, packet, size); | |
1163 | ||
1164 | if (port->port_tty) | |
1165 | wake_up_interruptible(&port->port_tty->write_wait); | |
1166 | ||
1167 | exit: | |
1168 | spin_unlock(&port->port_lock); | |
1169 | return size; | |
1170 | } | |
1171 | ||
1172 | /* | |
1173 | * gs_recv_packet | |
1174 | * | |
1175 | * Called for each USB packet received. Reads the packet | |
1176 | * header and stuffs the data in the appropriate tty buffer. | |
1177 | * Returns 0 if successful, or a negative error number. | |
1178 | * | |
1179 | * Called during USB completion routine, on interrupt time. | |
1180 | * | |
1181 | * We assume that disconnect will not happen until all completion | |
1182 | * routines have completed, so we can assume that the dev_port | |
1183 | * array does not change during the lifetime of this function. | |
1184 | */ | |
1185 | static int gs_recv_packet(struct gs_dev *dev, char *packet, unsigned int size) | |
1186 | { | |
1187 | unsigned int len; | |
1188 | struct gs_port *port; | |
1189 | int ret; | |
33f0f88f | 1190 | struct tty_struct *tty; |
1da177e4 LT |
1191 | |
1192 | /* TEMPORARY -- only port 0 is supported right now */ | |
1193 | port = dev->dev_port[0]; | |
1194 | ||
1195 | if (port == NULL) { | |
1196 | printk(KERN_ERR "gs_recv_packet: port=%d, NULL port pointer\n", | |
1197 | port->port_num); | |
1198 | return -EIO; | |
1199 | } | |
1200 | ||
1201 | spin_lock(&port->port_lock); | |
1202 | ||
1203 | if (port->port_open_count == 0) { | |
1204 | printk(KERN_ERR "gs_recv_packet: port=%d, port is closed\n", | |
1205 | port->port_num); | |
1206 | ret = -EIO; | |
1207 | goto exit; | |
1208 | } | |
1209 | ||
33f0f88f AC |
1210 | |
1211 | tty = port->port_tty; | |
1212 | ||
1213 | if (tty == NULL) { | |
1da177e4 LT |
1214 | printk(KERN_ERR "gs_recv_packet: port=%d, NULL tty pointer\n", |
1215 | port->port_num); | |
1216 | ret = -EIO; | |
1217 | goto exit; | |
1218 | } | |
1219 | ||
1220 | if (port->port_tty->magic != TTY_MAGIC) { | |
1221 | printk(KERN_ERR "gs_recv_packet: port=%d, bad tty magic\n", | |
1222 | port->port_num); | |
1223 | ret = -EIO; | |
1224 | goto exit; | |
1225 | } | |
1226 | ||
33f0f88f AC |
1227 | len = tty_buffer_request_room(tty, size); |
1228 | if (len > 0) { | |
1229 | tty_insert_flip_string(tty, packet, len); | |
1da177e4 LT |
1230 | tty_flip_buffer_push(port->port_tty); |
1231 | wake_up_interruptible(&port->port_tty->read_wait); | |
1232 | } | |
1da177e4 | 1233 | ret = 0; |
1da177e4 LT |
1234 | exit: |
1235 | spin_unlock(&port->port_lock); | |
1236 | return ret; | |
1237 | } | |
1238 | ||
1239 | /* | |
1240 | * gs_read_complete | |
1241 | */ | |
1242 | static void gs_read_complete(struct usb_ep *ep, struct usb_request *req) | |
1243 | { | |
1244 | int ret; | |
1245 | struct gs_dev *dev = ep->driver_data; | |
1246 | ||
1247 | if (dev == NULL) { | |
1248 | printk(KERN_ERR "gs_read_complete: NULL device pointer\n"); | |
1249 | return; | |
1250 | } | |
1251 | ||
1252 | switch(req->status) { | |
1253 | case 0: | |
51a0e85c | 1254 | /* normal completion */ |
1da177e4 LT |
1255 | gs_recv_packet(dev, req->buf, req->actual); |
1256 | requeue: | |
1257 | req->length = ep->maxpacket; | |
1258 | if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { | |
1259 | printk(KERN_ERR | |
1260 | "gs_read_complete: cannot queue read request, ret=%d\n", | |
1261 | ret); | |
1262 | } | |
1263 | break; | |
1264 | ||
1265 | case -ESHUTDOWN: | |
1266 | /* disconnect */ | |
1267 | gs_debug("gs_read_complete: shutdown\n"); | |
1268 | gs_free_req(ep, req); | |
1269 | break; | |
1270 | ||
1271 | default: | |
1272 | /* unexpected */ | |
1273 | printk(KERN_ERR | |
1274 | "gs_read_complete: unexpected status error, status=%d\n", | |
1275 | req->status); | |
1276 | goto requeue; | |
1277 | break; | |
1278 | } | |
1279 | } | |
1280 | ||
1281 | /* | |
1282 | * gs_write_complete | |
1283 | */ | |
1284 | static void gs_write_complete(struct usb_ep *ep, struct usb_request *req) | |
1285 | { | |
1286 | struct gs_dev *dev = ep->driver_data; | |
1287 | struct gs_req_entry *gs_req = req->context; | |
1288 | ||
1289 | if (dev == NULL) { | |
1290 | printk(KERN_ERR "gs_write_complete: NULL device pointer\n"); | |
1291 | return; | |
1292 | } | |
1293 | ||
1294 | switch(req->status) { | |
1295 | case 0: | |
1296 | /* normal completion */ | |
1297 | requeue: | |
1298 | if (gs_req == NULL) { | |
1299 | printk(KERN_ERR | |
1300 | "gs_write_complete: NULL request pointer\n"); | |
1301 | return; | |
1302 | } | |
1303 | ||
1304 | spin_lock(&dev->dev_lock); | |
1305 | list_add(&gs_req->re_entry, &dev->dev_req_list); | |
1306 | spin_unlock(&dev->dev_lock); | |
1307 | ||
1308 | gs_send(dev); | |
1309 | ||
1310 | break; | |
1311 | ||
1312 | case -ESHUTDOWN: | |
1313 | /* disconnect */ | |
1314 | gs_debug("gs_write_complete: shutdown\n"); | |
1315 | gs_free_req(ep, req); | |
1316 | break; | |
1317 | ||
1318 | default: | |
1319 | printk(KERN_ERR | |
1320 | "gs_write_complete: unexpected status error, status=%d\n", | |
1321 | req->status); | |
1322 | goto requeue; | |
1323 | break; | |
1324 | } | |
1325 | } | |
1326 | ||
1327 | /* Gadget Driver */ | |
1328 | ||
1329 | /* | |
1330 | * gs_bind | |
1331 | * | |
1332 | * Called on module load. Allocates and initializes the device | |
1333 | * structure and a control request. | |
1334 | */ | |
329af28b | 1335 | static int __init gs_bind(struct usb_gadget *gadget) |
1da177e4 LT |
1336 | { |
1337 | int ret; | |
1338 | struct usb_ep *ep; | |
1339 | struct gs_dev *dev; | |
91e79c91 | 1340 | int gcnum; |
1da177e4 | 1341 | |
91e79c91 DB |
1342 | /* Some controllers can't support CDC ACM: |
1343 | * - sh doesn't support multiple interfaces or configs; | |
1344 | * - sa1100 doesn't have a third interrupt endpoint | |
1345 | */ | |
1346 | if (gadget_is_sh(gadget) || gadget_is_sa1100(gadget)) | |
1da177e4 | 1347 | use_acm = 0; |
91e79c91 DB |
1348 | |
1349 | gcnum = usb_gadget_controller_number(gadget); | |
1350 | if (gcnum >= 0) | |
1da177e4 | 1351 | gs_device_desc.bcdDevice = |
91e79c91 DB |
1352 | cpu_to_le16(GS_VERSION_NUM | gcnum); |
1353 | else { | |
1da177e4 LT |
1354 | printk(KERN_WARNING "gs_bind: controller '%s' not recognized\n", |
1355 | gadget->name); | |
1356 | /* unrecognized, but safe unless bulk is REALLY quirky */ | |
1357 | gs_device_desc.bcdDevice = | |
1358 | __constant_cpu_to_le16(GS_VERSION_NUM|0x0099); | |
1359 | } | |
1360 | ||
1361 | usb_ep_autoconfig_reset(gadget); | |
1362 | ||
1363 | ep = usb_ep_autoconfig(gadget, &gs_fullspeed_in_desc); | |
1364 | if (!ep) | |
1365 | goto autoconf_fail; | |
1366 | EP_IN_NAME = ep->name; | |
1367 | ep->driver_data = ep; /* claim the endpoint */ | |
1368 | ||
1369 | ep = usb_ep_autoconfig(gadget, &gs_fullspeed_out_desc); | |
1370 | if (!ep) | |
1371 | goto autoconf_fail; | |
1372 | EP_OUT_NAME = ep->name; | |
1373 | ep->driver_data = ep; /* claim the endpoint */ | |
1374 | ||
1375 | if (use_acm) { | |
1376 | ep = usb_ep_autoconfig(gadget, &gs_fullspeed_notify_desc); | |
1377 | if (!ep) { | |
1378 | printk(KERN_ERR "gs_bind: cannot run ACM on %s\n", gadget->name); | |
1379 | goto autoconf_fail; | |
1380 | } | |
1381 | gs_device_desc.idProduct = __constant_cpu_to_le16( | |
1382 | GS_CDC_PRODUCT_ID), | |
1383 | EP_NOTIFY_NAME = ep->name; | |
1384 | ep->driver_data = ep; /* claim the endpoint */ | |
1385 | } | |
1386 | ||
1387 | gs_device_desc.bDeviceClass = use_acm | |
1388 | ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; | |
1389 | gs_device_desc.bMaxPacketSize0 = gadget->ep0->maxpacket; | |
1390 | ||
51a0e85c DB |
1391 | if (gadget_is_dualspeed(gadget)) { |
1392 | gs_qualifier_desc.bDeviceClass = use_acm | |
1393 | ? USB_CLASS_COMM : USB_CLASS_VENDOR_SPEC; | |
1394 | /* assume ep0 uses the same packet size for both speeds */ | |
1395 | gs_qualifier_desc.bMaxPacketSize0 = | |
1396 | gs_device_desc.bMaxPacketSize0; | |
1397 | /* assume endpoints are dual-speed */ | |
1398 | gs_highspeed_notify_desc.bEndpointAddress = | |
1399 | gs_fullspeed_notify_desc.bEndpointAddress; | |
1400 | gs_highspeed_in_desc.bEndpointAddress = | |
1401 | gs_fullspeed_in_desc.bEndpointAddress; | |
1402 | gs_highspeed_out_desc.bEndpointAddress = | |
1403 | gs_fullspeed_out_desc.bEndpointAddress; | |
1404 | } | |
1da177e4 LT |
1405 | |
1406 | usb_gadget_set_selfpowered(gadget); | |
1407 | ||
51a0e85c | 1408 | if (gadget_is_otg(gadget)) { |
1da177e4 LT |
1409 | gs_otg_descriptor.bmAttributes |= USB_OTG_HNP, |
1410 | gs_bulk_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
1411 | gs_acm_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
1412 | } | |
1413 | ||
dd00cc48 | 1414 | gs_device = dev = kzalloc(sizeof(struct gs_dev), GFP_KERNEL); |
1da177e4 LT |
1415 | if (dev == NULL) |
1416 | return -ENOMEM; | |
1417 | ||
1418 | snprintf(manufacturer, sizeof(manufacturer), "%s %s with %s", | |
96b644bd | 1419 | init_utsname()->sysname, init_utsname()->release, |
1da177e4 LT |
1420 | gadget->name); |
1421 | ||
1da177e4 LT |
1422 | dev->dev_gadget = gadget; |
1423 | spin_lock_init(&dev->dev_lock); | |
1424 | INIT_LIST_HEAD(&dev->dev_req_list); | |
1425 | set_gadget_data(gadget, dev); | |
1426 | ||
1427 | if ((ret=gs_alloc_ports(dev, GFP_KERNEL)) != 0) { | |
1428 | printk(KERN_ERR "gs_bind: cannot allocate ports\n"); | |
1429 | gs_unbind(gadget); | |
1430 | return ret; | |
1431 | } | |
1432 | ||
1433 | /* preallocate control response and buffer */ | |
1434 | dev->dev_ctrl_req = gs_alloc_req(gadget->ep0, GS_MAX_DESC_LEN, | |
1435 | GFP_KERNEL); | |
1436 | if (dev->dev_ctrl_req == NULL) { | |
1437 | gs_unbind(gadget); | |
1438 | return -ENOMEM; | |
1439 | } | |
1440 | dev->dev_ctrl_req->complete = gs_setup_complete; | |
1441 | ||
1442 | gadget->ep0->driver_data = dev; | |
1443 | ||
1444 | printk(KERN_INFO "gs_bind: %s %s bound\n", | |
1445 | GS_LONG_NAME, GS_VERSION_STR); | |
1446 | ||
1447 | return 0; | |
1448 | ||
1449 | autoconf_fail: | |
1450 | printk(KERN_ERR "gs_bind: cannot autoconfigure on %s\n", gadget->name); | |
1451 | return -ENODEV; | |
1452 | } | |
1453 | ||
1454 | /* | |
1455 | * gs_unbind | |
1456 | * | |
1457 | * Called on module unload. Frees the control request and device | |
1458 | * structure. | |
1459 | */ | |
a353678d | 1460 | static void /* __init_or_exit */ gs_unbind(struct usb_gadget *gadget) |
1da177e4 LT |
1461 | { |
1462 | struct gs_dev *dev = get_gadget_data(gadget); | |
1463 | ||
1464 | gs_device = NULL; | |
1465 | ||
1466 | /* read/write requests already freed, only control request remains */ | |
1467 | if (dev != NULL) { | |
1468 | if (dev->dev_ctrl_req != NULL) { | |
1469 | gs_free_req(gadget->ep0, dev->dev_ctrl_req); | |
1470 | dev->dev_ctrl_req = NULL; | |
1471 | } | |
1472 | gs_free_ports(dev); | |
437f375f VB |
1473 | if (dev->dev_notify_ep) |
1474 | usb_ep_disable(dev->dev_notify_ep); | |
1475 | if (dev->dev_in_ep) | |
1476 | usb_ep_disable(dev->dev_in_ep); | |
1477 | if (dev->dev_out_ep) | |
1478 | usb_ep_disable(dev->dev_out_ep); | |
1da177e4 LT |
1479 | kfree(dev); |
1480 | set_gadget_data(gadget, NULL); | |
1481 | } | |
1482 | ||
1483 | printk(KERN_INFO "gs_unbind: %s %s unbound\n", GS_LONG_NAME, | |
1484 | GS_VERSION_STR); | |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * gs_setup | |
1489 | * | |
1490 | * Implements all the control endpoint functionality that's not | |
1491 | * handled in hardware or the hardware driver. | |
1492 | * | |
1493 | * Returns the size of the data sent to the host, or a negative | |
1494 | * error number. | |
1495 | */ | |
1496 | static int gs_setup(struct usb_gadget *gadget, | |
1497 | const struct usb_ctrlrequest *ctrl) | |
1498 | { | |
1499 | int ret = -EOPNOTSUPP; | |
1500 | struct gs_dev *dev = get_gadget_data(gadget); | |
1501 | struct usb_request *req = dev->dev_ctrl_req; | |
1bbc1696 DB |
1502 | u16 wIndex = le16_to_cpu(ctrl->wIndex); |
1503 | u16 wValue = le16_to_cpu(ctrl->wValue); | |
1504 | u16 wLength = le16_to_cpu(ctrl->wLength); | |
1da177e4 LT |
1505 | |
1506 | switch (ctrl->bRequestType & USB_TYPE_MASK) { | |
1507 | case USB_TYPE_STANDARD: | |
1508 | ret = gs_setup_standard(gadget,ctrl); | |
1509 | break; | |
1510 | ||
1511 | case USB_TYPE_CLASS: | |
1512 | ret = gs_setup_class(gadget,ctrl); | |
1513 | break; | |
1514 | ||
1515 | default: | |
1516 | printk(KERN_ERR "gs_setup: unknown request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n", | |
1517 | ctrl->bRequestType, ctrl->bRequest, | |
1518 | wValue, wIndex, wLength); | |
1519 | break; | |
1520 | } | |
1521 | ||
1522 | /* respond with data transfer before status phase? */ | |
1523 | if (ret >= 0) { | |
1524 | req->length = ret; | |
1525 | req->zero = ret < wLength | |
1526 | && (ret % gadget->ep0->maxpacket) == 0; | |
1527 | ret = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1528 | if (ret < 0) { | |
1529 | printk(KERN_ERR "gs_setup: cannot queue response, ret=%d\n", | |
1530 | ret); | |
1531 | req->status = 0; | |
1532 | gs_setup_complete(gadget->ep0, req); | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | /* device either stalls (ret < 0) or reports success */ | |
1537 | return ret; | |
1538 | } | |
1539 | ||
1540 | static int gs_setup_standard(struct usb_gadget *gadget, | |
1541 | const struct usb_ctrlrequest *ctrl) | |
1542 | { | |
1543 | int ret = -EOPNOTSUPP; | |
1544 | struct gs_dev *dev = get_gadget_data(gadget); | |
1545 | struct usb_request *req = dev->dev_ctrl_req; | |
1bbc1696 DB |
1546 | u16 wIndex = le16_to_cpu(ctrl->wIndex); |
1547 | u16 wValue = le16_to_cpu(ctrl->wValue); | |
1548 | u16 wLength = le16_to_cpu(ctrl->wLength); | |
1da177e4 LT |
1549 | |
1550 | switch (ctrl->bRequest) { | |
1551 | case USB_REQ_GET_DESCRIPTOR: | |
1552 | if (ctrl->bRequestType != USB_DIR_IN) | |
1553 | break; | |
1554 | ||
1555 | switch (wValue >> 8) { | |
1556 | case USB_DT_DEVICE: | |
1557 | ret = min(wLength, | |
1558 | (u16)sizeof(struct usb_device_descriptor)); | |
1559 | memcpy(req->buf, &gs_device_desc, ret); | |
1560 | break; | |
1561 | ||
1da177e4 | 1562 | case USB_DT_DEVICE_QUALIFIER: |
51a0e85c | 1563 | if (!gadget_is_dualspeed(gadget)) |
1da177e4 LT |
1564 | break; |
1565 | ret = min(wLength, | |
1566 | (u16)sizeof(struct usb_qualifier_descriptor)); | |
1567 | memcpy(req->buf, &gs_qualifier_desc, ret); | |
1568 | break; | |
1569 | ||
1570 | case USB_DT_OTHER_SPEED_CONFIG: | |
51a0e85c | 1571 | if (!gadget_is_dualspeed(gadget)) |
1da177e4 LT |
1572 | break; |
1573 | /* fall through */ | |
1da177e4 | 1574 | case USB_DT_CONFIG: |
51a0e85c | 1575 | ret = gs_build_config_buf(req->buf, gadget, |
1da177e4 | 1576 | wValue >> 8, wValue & 0xff, |
51a0e85c | 1577 | gadget_is_otg(gadget)); |
1da177e4 LT |
1578 | if (ret >= 0) |
1579 | ret = min(wLength, (u16)ret); | |
1580 | break; | |
1581 | ||
1582 | case USB_DT_STRING: | |
1583 | /* wIndex == language code. */ | |
1584 | ret = usb_gadget_get_string(&gs_string_table, | |
1585 | wValue & 0xff, req->buf); | |
1586 | if (ret >= 0) | |
1587 | ret = min(wLength, (u16)ret); | |
1588 | break; | |
1589 | } | |
1590 | break; | |
1591 | ||
1592 | case USB_REQ_SET_CONFIGURATION: | |
1593 | if (ctrl->bRequestType != 0) | |
1594 | break; | |
1595 | spin_lock(&dev->dev_lock); | |
1596 | ret = gs_set_config(dev, wValue); | |
1597 | spin_unlock(&dev->dev_lock); | |
1598 | break; | |
1599 | ||
1600 | case USB_REQ_GET_CONFIGURATION: | |
1601 | if (ctrl->bRequestType != USB_DIR_IN) | |
1602 | break; | |
1603 | *(u8 *)req->buf = dev->dev_config; | |
1604 | ret = min(wLength, (u16)1); | |
1605 | break; | |
1606 | ||
1607 | case USB_REQ_SET_INTERFACE: | |
1608 | if (ctrl->bRequestType != USB_RECIP_INTERFACE | |
1609 | || !dev->dev_config | |
1610 | || wIndex >= GS_MAX_NUM_INTERFACES) | |
1611 | break; | |
1612 | if (dev->dev_config == GS_BULK_CONFIG_ID | |
1613 | && wIndex != GS_BULK_INTERFACE_ID) | |
1614 | break; | |
1615 | /* no alternate interface settings */ | |
1616 | if (wValue != 0) | |
1617 | break; | |
1618 | spin_lock(&dev->dev_lock); | |
1619 | /* PXA hardware partially handles SET_INTERFACE; | |
1620 | * we need to kluge around that interference. */ | |
1621 | if (gadget_is_pxa(gadget)) { | |
1622 | ret = gs_set_config(dev, use_acm ? | |
1623 | GS_ACM_CONFIG_ID : GS_BULK_CONFIG_ID); | |
1624 | goto set_interface_done; | |
1625 | } | |
1626 | if (dev->dev_config != GS_BULK_CONFIG_ID | |
1627 | && wIndex == GS_CONTROL_INTERFACE_ID) { | |
1628 | if (dev->dev_notify_ep) { | |
1629 | usb_ep_disable(dev->dev_notify_ep); | |
1630 | usb_ep_enable(dev->dev_notify_ep, dev->dev_notify_ep_desc); | |
1631 | } | |
1632 | } else { | |
1633 | usb_ep_disable(dev->dev_in_ep); | |
1634 | usb_ep_disable(dev->dev_out_ep); | |
1635 | usb_ep_enable(dev->dev_in_ep, dev->dev_in_ep_desc); | |
1636 | usb_ep_enable(dev->dev_out_ep, dev->dev_out_ep_desc); | |
1637 | } | |
1638 | ret = 0; | |
1639 | set_interface_done: | |
1640 | spin_unlock(&dev->dev_lock); | |
1641 | break; | |
1642 | ||
1643 | case USB_REQ_GET_INTERFACE: | |
1644 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE) | |
1645 | || dev->dev_config == GS_NO_CONFIG_ID) | |
1646 | break; | |
1647 | if (wIndex >= GS_MAX_NUM_INTERFACES | |
1648 | || (dev->dev_config == GS_BULK_CONFIG_ID | |
1649 | && wIndex != GS_BULK_INTERFACE_ID)) { | |
1650 | ret = -EDOM; | |
1651 | break; | |
1652 | } | |
1653 | /* no alternate interface settings */ | |
1654 | *(u8 *)req->buf = 0; | |
1655 | ret = min(wLength, (u16)1); | |
1656 | break; | |
1657 | ||
1658 | default: | |
1659 | printk(KERN_ERR "gs_setup: unknown standard request, type=%02x, request=%02x, value=%04x, index=%04x, length=%d\n", | |
1660 | ctrl->bRequestType, ctrl->bRequest, | |
1661 | wValue, wIndex, wLength); | |
1662 | break; | |
1663 | } | |
1664 | ||
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | static int gs_setup_class(struct usb_gadget *gadget, | |
1669 | const struct usb_ctrlrequest *ctrl) | |
1670 | { | |
1671 | int ret = -EOPNOTSUPP; | |
1672 | struct gs_dev *dev = get_gadget_data(gadget); | |
1673 | struct gs_port *port = dev->dev_port[0]; /* ACM only has one port */ | |
1674 | struct usb_request *req = dev->dev_ctrl_req; | |
1bbc1696 DB |
1675 | u16 wIndex = le16_to_cpu(ctrl->wIndex); |
1676 | u16 wValue = le16_to_cpu(ctrl->wValue); | |
1677 | u16 wLength = le16_to_cpu(ctrl->wLength); | |
1da177e4 LT |
1678 | |
1679 | switch (ctrl->bRequest) { | |
1680 | case USB_CDC_REQ_SET_LINE_CODING: | |
49b4f902 DB |
1681 | /* FIXME Submit req to read the data; have its completion |
1682 | * handler copy that data to port->port_line_coding (iff | |
1683 | * it's valid) and maybe pass it on. Until then, fail. | |
1684 | */ | |
1685 | printk(KERN_WARNING "gs_setup: set_line_coding " | |
1686 | "unuspported\n"); | |
1da177e4 LT |
1687 | break; |
1688 | ||
1689 | case USB_CDC_REQ_GET_LINE_CODING: | |
1690 | port = dev->dev_port[0]; /* ACM only has one port */ | |
1691 | ret = min(wLength, | |
1692 | (u16)sizeof(struct usb_cdc_line_coding)); | |
1693 | if (port) { | |
1694 | spin_lock(&port->port_lock); | |
1695 | memcpy(req->buf, &port->port_line_coding, ret); | |
1696 | spin_unlock(&port->port_lock); | |
1697 | } | |
1698 | break; | |
1699 | ||
1700 | case USB_CDC_REQ_SET_CONTROL_LINE_STATE: | |
49b4f902 DB |
1701 | /* FIXME Submit req to read the data; have its completion |
1702 | * handler use that to set the state (iff it's valid) and | |
1703 | * maybe pass it on. Until then, fail. | |
1704 | */ | |
1705 | printk(KERN_WARNING "gs_setup: set_control_line_state " | |
1706 | "unuspported\n"); | |
1da177e4 LT |
1707 | break; |
1708 | ||
1709 | default: | |
49b4f902 DB |
1710 | printk(KERN_ERR "gs_setup: unknown class request, " |
1711 | "type=%02x, request=%02x, value=%04x, " | |
1712 | "index=%04x, length=%d\n", | |
1da177e4 LT |
1713 | ctrl->bRequestType, ctrl->bRequest, |
1714 | wValue, wIndex, wLength); | |
1715 | break; | |
1716 | } | |
1717 | ||
1718 | return ret; | |
1719 | } | |
1720 | ||
1721 | /* | |
1722 | * gs_setup_complete | |
1723 | */ | |
1724 | static void gs_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1725 | { | |
1726 | if (req->status || req->actual != req->length) { | |
1727 | printk(KERN_ERR "gs_setup_complete: status error, status=%d, actual=%d, length=%d\n", | |
1728 | req->status, req->actual, req->length); | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * gs_disconnect | |
1734 | * | |
1735 | * Called when the device is disconnected. Frees the closed | |
1736 | * ports and disconnects open ports. Open ports will be freed | |
1737 | * on close. Then reallocates the ports for the next connection. | |
1738 | */ | |
1739 | static void gs_disconnect(struct usb_gadget *gadget) | |
1740 | { | |
1741 | unsigned long flags; | |
1742 | struct gs_dev *dev = get_gadget_data(gadget); | |
1743 | ||
1744 | spin_lock_irqsave(&dev->dev_lock, flags); | |
1745 | ||
1746 | gs_reset_config(dev); | |
1747 | ||
1748 | /* free closed ports and disconnect open ports */ | |
1749 | /* (open ports will be freed when closed) */ | |
1750 | gs_free_ports(dev); | |
1751 | ||
1752 | /* re-allocate ports for the next connection */ | |
1753 | if (gs_alloc_ports(dev, GFP_ATOMIC) != 0) | |
1754 | printk(KERN_ERR "gs_disconnect: cannot re-allocate ports\n"); | |
1755 | ||
1756 | spin_unlock_irqrestore(&dev->dev_lock, flags); | |
1757 | ||
1758 | printk(KERN_INFO "gs_disconnect: %s disconnected\n", GS_LONG_NAME); | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * gs_set_config | |
1763 | * | |
1764 | * Configures the device by enabling device specific | |
1765 | * optimizations, setting up the endpoints, allocating | |
1766 | * read and write requests and queuing read requests. | |
1767 | * | |
1768 | * The device lock must be held when calling this function. | |
1769 | */ | |
1770 | static int gs_set_config(struct gs_dev *dev, unsigned config) | |
1771 | { | |
1772 | int i; | |
1773 | int ret = 0; | |
1774 | struct usb_gadget *gadget = dev->dev_gadget; | |
1775 | struct usb_ep *ep; | |
1776 | struct usb_endpoint_descriptor *ep_desc; | |
1777 | struct usb_request *req; | |
1778 | struct gs_req_entry *req_entry; | |
1779 | ||
1780 | if (dev == NULL) { | |
1781 | printk(KERN_ERR "gs_set_config: NULL device pointer\n"); | |
1782 | return 0; | |
1783 | } | |
1784 | ||
1785 | if (config == dev->dev_config) | |
1786 | return 0; | |
1787 | ||
1788 | gs_reset_config(dev); | |
1789 | ||
1790 | switch (config) { | |
1791 | case GS_NO_CONFIG_ID: | |
1792 | return 0; | |
1793 | case GS_BULK_CONFIG_ID: | |
1794 | if (use_acm) | |
1795 | return -EINVAL; | |
1796 | /* device specific optimizations */ | |
1797 | if (gadget_is_net2280(gadget)) | |
1798 | net2280_set_fifo_mode(gadget, 1); | |
1799 | break; | |
1800 | case GS_ACM_CONFIG_ID: | |
1801 | if (!use_acm) | |
1802 | return -EINVAL; | |
1803 | /* device specific optimizations */ | |
1804 | if (gadget_is_net2280(gadget)) | |
1805 | net2280_set_fifo_mode(gadget, 1); | |
1806 | break; | |
1807 | default: | |
1808 | return -EINVAL; | |
1809 | } | |
1810 | ||
1811 | dev->dev_config = config; | |
1812 | ||
1813 | gadget_for_each_ep(ep, gadget) { | |
1814 | ||
1815 | if (EP_NOTIFY_NAME | |
1816 | && strcmp(ep->name, EP_NOTIFY_NAME) == 0) { | |
51a0e85c | 1817 | ep_desc = choose_ep_desc(gadget, |
1da177e4 LT |
1818 | &gs_highspeed_notify_desc, |
1819 | &gs_fullspeed_notify_desc); | |
1820 | ret = usb_ep_enable(ep,ep_desc); | |
1821 | if (ret == 0) { | |
1822 | ep->driver_data = dev; | |
1823 | dev->dev_notify_ep = ep; | |
1824 | dev->dev_notify_ep_desc = ep_desc; | |
1825 | } else { | |
1826 | printk(KERN_ERR "gs_set_config: cannot enable notify endpoint %s, ret=%d\n", | |
1827 | ep->name, ret); | |
1828 | goto exit_reset_config; | |
1829 | } | |
1830 | } | |
1831 | ||
1832 | else if (strcmp(ep->name, EP_IN_NAME) == 0) { | |
51a0e85c DB |
1833 | ep_desc = choose_ep_desc(gadget, |
1834 | &gs_highspeed_in_desc, | |
1da177e4 LT |
1835 | &gs_fullspeed_in_desc); |
1836 | ret = usb_ep_enable(ep,ep_desc); | |
1837 | if (ret == 0) { | |
1838 | ep->driver_data = dev; | |
1839 | dev->dev_in_ep = ep; | |
1840 | dev->dev_in_ep_desc = ep_desc; | |
1841 | } else { | |
1842 | printk(KERN_ERR "gs_set_config: cannot enable in endpoint %s, ret=%d\n", | |
1843 | ep->name, ret); | |
1844 | goto exit_reset_config; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | else if (strcmp(ep->name, EP_OUT_NAME) == 0) { | |
51a0e85c | 1849 | ep_desc = choose_ep_desc(gadget, |
1da177e4 LT |
1850 | &gs_highspeed_out_desc, |
1851 | &gs_fullspeed_out_desc); | |
1852 | ret = usb_ep_enable(ep,ep_desc); | |
1853 | if (ret == 0) { | |
1854 | ep->driver_data = dev; | |
1855 | dev->dev_out_ep = ep; | |
1856 | dev->dev_out_ep_desc = ep_desc; | |
1857 | } else { | |
1858 | printk(KERN_ERR "gs_set_config: cannot enable out endpoint %s, ret=%d\n", | |
1859 | ep->name, ret); | |
1860 | goto exit_reset_config; | |
1861 | } | |
1862 | } | |
1863 | ||
1864 | } | |
1865 | ||
1866 | if (dev->dev_in_ep == NULL || dev->dev_out_ep == NULL | |
1867 | || (config != GS_BULK_CONFIG_ID && dev->dev_notify_ep == NULL)) { | |
1868 | printk(KERN_ERR "gs_set_config: cannot find endpoints\n"); | |
1869 | ret = -ENODEV; | |
1870 | goto exit_reset_config; | |
1871 | } | |
1872 | ||
1873 | /* allocate and queue read requests */ | |
1874 | ep = dev->dev_out_ep; | |
1875 | for (i=0; i<read_q_size && ret == 0; i++) { | |
1876 | if ((req=gs_alloc_req(ep, ep->maxpacket, GFP_ATOMIC))) { | |
1877 | req->complete = gs_read_complete; | |
1878 | if ((ret=usb_ep_queue(ep, req, GFP_ATOMIC))) { | |
1879 | printk(KERN_ERR "gs_set_config: cannot queue read request, ret=%d\n", | |
1880 | ret); | |
1881 | } | |
1882 | } else { | |
1883 | printk(KERN_ERR "gs_set_config: cannot allocate read requests\n"); | |
1884 | ret = -ENOMEM; | |
1885 | goto exit_reset_config; | |
1886 | } | |
1887 | } | |
1888 | ||
1889 | /* allocate write requests, and put on free list */ | |
1890 | ep = dev->dev_in_ep; | |
1891 | for (i=0; i<write_q_size; i++) { | |
1892 | if ((req_entry=gs_alloc_req_entry(ep, ep->maxpacket, GFP_ATOMIC))) { | |
1893 | req_entry->re_req->complete = gs_write_complete; | |
1894 | list_add(&req_entry->re_entry, &dev->dev_req_list); | |
1895 | } else { | |
1896 | printk(KERN_ERR "gs_set_config: cannot allocate write requests\n"); | |
1897 | ret = -ENOMEM; | |
1898 | goto exit_reset_config; | |
1899 | } | |
1900 | } | |
1901 | ||
1902 | printk(KERN_INFO "gs_set_config: %s configured, %s speed %s config\n", | |
1903 | GS_LONG_NAME, | |
1904 | gadget->speed == USB_SPEED_HIGH ? "high" : "full", | |
1905 | config == GS_BULK_CONFIG_ID ? "BULK" : "CDC-ACM"); | |
1906 | ||
1907 | return 0; | |
1908 | ||
1909 | exit_reset_config: | |
1910 | gs_reset_config(dev); | |
1911 | return ret; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * gs_reset_config | |
1916 | * | |
1917 | * Mark the device as not configured, disable all endpoints, | |
1918 | * which forces completion of pending I/O and frees queued | |
1919 | * requests, and free the remaining write requests on the | |
1920 | * free list. | |
1921 | * | |
1922 | * The device lock must be held when calling this function. | |
1923 | */ | |
1924 | static void gs_reset_config(struct gs_dev *dev) | |
1925 | { | |
1926 | struct gs_req_entry *req_entry; | |
1927 | ||
1928 | if (dev == NULL) { | |
1929 | printk(KERN_ERR "gs_reset_config: NULL device pointer\n"); | |
1930 | return; | |
1931 | } | |
1932 | ||
1933 | if (dev->dev_config == GS_NO_CONFIG_ID) | |
1934 | return; | |
1935 | ||
1936 | dev->dev_config = GS_NO_CONFIG_ID; | |
1937 | ||
1938 | /* free write requests on the free list */ | |
1939 | while(!list_empty(&dev->dev_req_list)) { | |
1940 | req_entry = list_entry(dev->dev_req_list.next, | |
1941 | struct gs_req_entry, re_entry); | |
1942 | list_del(&req_entry->re_entry); | |
1943 | gs_free_req_entry(dev->dev_in_ep, req_entry); | |
1944 | } | |
1945 | ||
1946 | /* disable endpoints, forcing completion of pending i/o; */ | |
1947 | /* completion handlers free their requests in this case */ | |
1948 | if (dev->dev_notify_ep) { | |
1949 | usb_ep_disable(dev->dev_notify_ep); | |
1950 | dev->dev_notify_ep = NULL; | |
1951 | } | |
1952 | if (dev->dev_in_ep) { | |
1953 | usb_ep_disable(dev->dev_in_ep); | |
1954 | dev->dev_in_ep = NULL; | |
1955 | } | |
1956 | if (dev->dev_out_ep) { | |
1957 | usb_ep_disable(dev->dev_out_ep); | |
1958 | dev->dev_out_ep = NULL; | |
1959 | } | |
1960 | } | |
1961 | ||
1962 | /* | |
1963 | * gs_build_config_buf | |
1964 | * | |
1965 | * Builds the config descriptors in the given buffer and returns the | |
1966 | * length, or a negative error number. | |
1967 | */ | |
51a0e85c | 1968 | static int gs_build_config_buf(u8 *buf, struct usb_gadget *g, |
1da177e4 LT |
1969 | u8 type, unsigned int index, int is_otg) |
1970 | { | |
1971 | int len; | |
51a0e85c | 1972 | int high_speed = 0; |
1da177e4 LT |
1973 | const struct usb_config_descriptor *config_desc; |
1974 | const struct usb_descriptor_header **function; | |
1975 | ||
1976 | if (index >= gs_device_desc.bNumConfigurations) | |
1977 | return -EINVAL; | |
1978 | ||
1979 | /* other speed switches high and full speed */ | |
51a0e85c DB |
1980 | if (gadget_is_dualspeed(g)) { |
1981 | high_speed = (g->speed == USB_SPEED_HIGH); | |
1982 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
1983 | high_speed = !high_speed; | |
1984 | } | |
1da177e4 LT |
1985 | |
1986 | if (use_acm) { | |
1987 | config_desc = &gs_acm_config_desc; | |
51a0e85c DB |
1988 | function = high_speed |
1989 | ? gs_acm_highspeed_function | |
1990 | : gs_acm_fullspeed_function; | |
1da177e4 LT |
1991 | } else { |
1992 | config_desc = &gs_bulk_config_desc; | |
51a0e85c DB |
1993 | function = high_speed |
1994 | ? gs_bulk_highspeed_function | |
1995 | : gs_bulk_fullspeed_function; | |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | /* for now, don't advertise srp-only devices */ | |
1999 | if (!is_otg) | |
2000 | function++; | |
2001 | ||
2002 | len = usb_gadget_config_buf(config_desc, buf, GS_MAX_DESC_LEN, function); | |
2003 | if (len < 0) | |
2004 | return len; | |
2005 | ||
2006 | ((struct usb_config_descriptor *)buf)->bDescriptorType = type; | |
2007 | ||
2008 | return len; | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * gs_alloc_req | |
2013 | * | |
2014 | * Allocate a usb_request and its buffer. Returns a pointer to the | |
2015 | * usb_request or NULL if there is an error. | |
2016 | */ | |
1bbc1696 | 2017 | static struct usb_request * |
55016f10 | 2018 | gs_alloc_req(struct usb_ep *ep, unsigned int len, gfp_t kmalloc_flags) |
1da177e4 LT |
2019 | { |
2020 | struct usb_request *req; | |
2021 | ||
2022 | if (ep == NULL) | |
2023 | return NULL; | |
2024 | ||
2025 | req = usb_ep_alloc_request(ep, kmalloc_flags); | |
2026 | ||
2027 | if (req != NULL) { | |
2028 | req->length = len; | |
2029 | req->buf = kmalloc(len, kmalloc_flags); | |
2030 | if (req->buf == NULL) { | |
2031 | usb_ep_free_request(ep, req); | |
2032 | return NULL; | |
2033 | } | |
2034 | } | |
2035 | ||
2036 | return req; | |
2037 | } | |
2038 | ||
2039 | /* | |
2040 | * gs_free_req | |
2041 | * | |
2042 | * Free a usb_request and its buffer. | |
2043 | */ | |
2044 | static void gs_free_req(struct usb_ep *ep, struct usb_request *req) | |
2045 | { | |
2046 | if (ep != NULL && req != NULL) { | |
2047 | kfree(req->buf); | |
2048 | usb_ep_free_request(ep, req); | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | /* | |
2053 | * gs_alloc_req_entry | |
2054 | * | |
2055 | * Allocates a request and its buffer, using the given | |
2056 | * endpoint, buffer len, and kmalloc flags. | |
2057 | */ | |
1bbc1696 | 2058 | static struct gs_req_entry * |
55016f10 | 2059 | gs_alloc_req_entry(struct usb_ep *ep, unsigned len, gfp_t kmalloc_flags) |
1da177e4 LT |
2060 | { |
2061 | struct gs_req_entry *req; | |
2062 | ||
2063 | req = kmalloc(sizeof(struct gs_req_entry), kmalloc_flags); | |
2064 | if (req == NULL) | |
2065 | return NULL; | |
2066 | ||
2067 | req->re_req = gs_alloc_req(ep, len, kmalloc_flags); | |
2068 | if (req->re_req == NULL) { | |
2069 | kfree(req); | |
2070 | return NULL; | |
2071 | } | |
2072 | ||
2073 | req->re_req->context = req; | |
2074 | ||
2075 | return req; | |
2076 | } | |
2077 | ||
2078 | /* | |
2079 | * gs_free_req_entry | |
2080 | * | |
2081 | * Frees a request and its buffer. | |
2082 | */ | |
2083 | static void gs_free_req_entry(struct usb_ep *ep, struct gs_req_entry *req) | |
2084 | { | |
2085 | if (ep != NULL && req != NULL) { | |
2086 | if (req->re_req != NULL) | |
2087 | gs_free_req(ep, req->re_req); | |
2088 | kfree(req); | |
2089 | } | |
2090 | } | |
2091 | ||
2092 | /* | |
2093 | * gs_alloc_ports | |
2094 | * | |
2095 | * Allocate all ports and set the gs_dev struct to point to them. | |
2096 | * Return 0 if successful, or a negative error number. | |
2097 | * | |
2098 | * The device lock is normally held when calling this function. | |
2099 | */ | |
55016f10 | 2100 | static int gs_alloc_ports(struct gs_dev *dev, gfp_t kmalloc_flags) |
1da177e4 LT |
2101 | { |
2102 | int i; | |
2103 | struct gs_port *port; | |
2104 | ||
2105 | if (dev == NULL) | |
2106 | return -EIO; | |
2107 | ||
2108 | for (i=0; i<GS_NUM_PORTS; i++) { | |
7039f422 | 2109 | if ((port=kzalloc(sizeof(struct gs_port), kmalloc_flags)) == NULL) |
1da177e4 LT |
2110 | return -ENOMEM; |
2111 | ||
1da177e4 LT |
2112 | port->port_dev = dev; |
2113 | port->port_num = i; | |
2114 | port->port_line_coding.dwDTERate = cpu_to_le32(GS_DEFAULT_DTE_RATE); | |
2115 | port->port_line_coding.bCharFormat = GS_DEFAULT_CHAR_FORMAT; | |
2116 | port->port_line_coding.bParityType = GS_DEFAULT_PARITY; | |
2117 | port->port_line_coding.bDataBits = GS_DEFAULT_DATA_BITS; | |
2118 | spin_lock_init(&port->port_lock); | |
2119 | init_waitqueue_head(&port->port_write_wait); | |
2120 | ||
2121 | dev->dev_port[i] = port; | |
2122 | } | |
2123 | ||
2124 | return 0; | |
2125 | } | |
2126 | ||
2127 | /* | |
2128 | * gs_free_ports | |
2129 | * | |
2130 | * Free all closed ports. Open ports are disconnected by | |
2131 | * freeing their write buffers, setting their device pointers | |
2132 | * and the pointers to them in the device to NULL. These | |
2133 | * ports will be freed when closed. | |
2134 | * | |
2135 | * The device lock is normally held when calling this function. | |
2136 | */ | |
2137 | static void gs_free_ports(struct gs_dev *dev) | |
2138 | { | |
2139 | int i; | |
2140 | unsigned long flags; | |
2141 | struct gs_port *port; | |
2142 | ||
2143 | if (dev == NULL) | |
2144 | return; | |
2145 | ||
2146 | for (i=0; i<GS_NUM_PORTS; i++) { | |
2147 | if ((port=dev->dev_port[i]) != NULL) { | |
2148 | dev->dev_port[i] = NULL; | |
2149 | ||
2150 | spin_lock_irqsave(&port->port_lock, flags); | |
2151 | ||
2152 | if (port->port_write_buf != NULL) { | |
2153 | gs_buf_free(port->port_write_buf); | |
2154 | port->port_write_buf = NULL; | |
2155 | } | |
2156 | ||
2157 | if (port->port_open_count > 0 || port->port_in_use) { | |
2158 | port->port_dev = NULL; | |
2159 | wake_up_interruptible(&port->port_write_wait); | |
2160 | if (port->port_tty) { | |
2161 | wake_up_interruptible(&port->port_tty->read_wait); | |
2162 | wake_up_interruptible(&port->port_tty->write_wait); | |
2163 | } | |
2164 | spin_unlock_irqrestore(&port->port_lock, flags); | |
2165 | } else { | |
2166 | spin_unlock_irqrestore(&port->port_lock, flags); | |
2167 | kfree(port); | |
2168 | } | |
2169 | ||
2170 | } | |
2171 | } | |
2172 | } | |
2173 | ||
2174 | /* Circular Buffer */ | |
2175 | ||
2176 | /* | |
2177 | * gs_buf_alloc | |
2178 | * | |
2179 | * Allocate a circular buffer and all associated memory. | |
2180 | */ | |
55016f10 | 2181 | static struct gs_buf *gs_buf_alloc(unsigned int size, gfp_t kmalloc_flags) |
1da177e4 LT |
2182 | { |
2183 | struct gs_buf *gb; | |
2184 | ||
2185 | if (size == 0) | |
2186 | return NULL; | |
2187 | ||
5cbded58 | 2188 | gb = kmalloc(sizeof(struct gs_buf), kmalloc_flags); |
1da177e4 LT |
2189 | if (gb == NULL) |
2190 | return NULL; | |
2191 | ||
2192 | gb->buf_buf = kmalloc(size, kmalloc_flags); | |
2193 | if (gb->buf_buf == NULL) { | |
2194 | kfree(gb); | |
2195 | return NULL; | |
2196 | } | |
2197 | ||
2198 | gb->buf_size = size; | |
2199 | gb->buf_get = gb->buf_put = gb->buf_buf; | |
2200 | ||
2201 | return gb; | |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * gs_buf_free | |
2206 | * | |
2207 | * Free the buffer and all associated memory. | |
2208 | */ | |
b29dbbd8 | 2209 | static void gs_buf_free(struct gs_buf *gb) |
1da177e4 | 2210 | { |
1bc3c9e1 JJ |
2211 | if (gb) { |
2212 | kfree(gb->buf_buf); | |
1da177e4 LT |
2213 | kfree(gb); |
2214 | } | |
2215 | } | |
2216 | ||
2217 | /* | |
2218 | * gs_buf_clear | |
2219 | * | |
2220 | * Clear out all data in the circular buffer. | |
2221 | */ | |
b29dbbd8 | 2222 | static void gs_buf_clear(struct gs_buf *gb) |
1da177e4 LT |
2223 | { |
2224 | if (gb != NULL) | |
2225 | gb->buf_get = gb->buf_put; | |
2226 | /* equivalent to a get of all data available */ | |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * gs_buf_data_avail | |
2231 | * | |
2232 | * Return the number of bytes of data available in the circular | |
2233 | * buffer. | |
2234 | */ | |
b29dbbd8 | 2235 | static unsigned int gs_buf_data_avail(struct gs_buf *gb) |
1da177e4 LT |
2236 | { |
2237 | if (gb != NULL) | |
2238 | return (gb->buf_size + gb->buf_put - gb->buf_get) % gb->buf_size; | |
2239 | else | |
2240 | return 0; | |
2241 | } | |
2242 | ||
2243 | /* | |
2244 | * gs_buf_space_avail | |
2245 | * | |
2246 | * Return the number of bytes of space available in the circular | |
2247 | * buffer. | |
2248 | */ | |
b29dbbd8 | 2249 | static unsigned int gs_buf_space_avail(struct gs_buf *gb) |
1da177e4 LT |
2250 | { |
2251 | if (gb != NULL) | |
2252 | return (gb->buf_size + gb->buf_get - gb->buf_put - 1) % gb->buf_size; | |
2253 | else | |
2254 | return 0; | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * gs_buf_put | |
2259 | * | |
2260 | * Copy data data from a user buffer and put it into the circular buffer. | |
2261 | * Restrict to the amount of space available. | |
2262 | * | |
2263 | * Return the number of bytes copied. | |
2264 | */ | |
b29dbbd8 DB |
2265 | static unsigned int |
2266 | gs_buf_put(struct gs_buf *gb, const char *buf, unsigned int count) | |
1da177e4 LT |
2267 | { |
2268 | unsigned int len; | |
2269 | ||
2270 | if (gb == NULL) | |
2271 | return 0; | |
2272 | ||
2273 | len = gs_buf_space_avail(gb); | |
2274 | if (count > len) | |
2275 | count = len; | |
2276 | ||
2277 | if (count == 0) | |
2278 | return 0; | |
2279 | ||
2280 | len = gb->buf_buf + gb->buf_size - gb->buf_put; | |
2281 | if (count > len) { | |
2282 | memcpy(gb->buf_put, buf, len); | |
2283 | memcpy(gb->buf_buf, buf+len, count - len); | |
2284 | gb->buf_put = gb->buf_buf + count - len; | |
2285 | } else { | |
2286 | memcpy(gb->buf_put, buf, count); | |
2287 | if (count < len) | |
2288 | gb->buf_put += count; | |
2289 | else /* count == len */ | |
2290 | gb->buf_put = gb->buf_buf; | |
2291 | } | |
2292 | ||
2293 | return count; | |
2294 | } | |
2295 | ||
2296 | /* | |
2297 | * gs_buf_get | |
2298 | * | |
2299 | * Get data from the circular buffer and copy to the given buffer. | |
2300 | * Restrict to the amount of data available. | |
2301 | * | |
2302 | * Return the number of bytes copied. | |
2303 | */ | |
b29dbbd8 DB |
2304 | static unsigned int |
2305 | gs_buf_get(struct gs_buf *gb, char *buf, unsigned int count) | |
1da177e4 LT |
2306 | { |
2307 | unsigned int len; | |
2308 | ||
2309 | if (gb == NULL) | |
2310 | return 0; | |
2311 | ||
2312 | len = gs_buf_data_avail(gb); | |
2313 | if (count > len) | |
2314 | count = len; | |
2315 | ||
2316 | if (count == 0) | |
2317 | return 0; | |
2318 | ||
2319 | len = gb->buf_buf + gb->buf_size - gb->buf_get; | |
2320 | if (count > len) { | |
2321 | memcpy(buf, gb->buf_get, len); | |
2322 | memcpy(buf+len, gb->buf_buf, count - len); | |
2323 | gb->buf_get = gb->buf_buf + count - len; | |
2324 | } else { | |
2325 | memcpy(buf, gb->buf_get, count); | |
2326 | if (count < len) | |
2327 | gb->buf_get += count; | |
2328 | else /* count == len */ | |
2329 | gb->buf_get = gb->buf_buf; | |
2330 | } | |
2331 | ||
2332 | return count; | |
2333 | } |