Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Greybus "AP" USB driver |
| 3 | * |
| 4 | * Copyright 2014 Google Inc. |
| 5 | * |
| 6 | * Released under the GPLv2 only. |
| 7 | */ |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/usb.h> |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 13 | #include "greybus.h" |
Greg Kroah-Hartman | 43cc32a | 2014-09-07 13:51:12 -0700 | [diff] [blame] | 14 | #include "svc_msg.h" |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 15 | |
| 16 | static const struct usb_device_id id_table[] = { |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 17 | { USB_DEVICE(0xffff, 0x0001) }, // FIXME |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 18 | { }, |
| 19 | }; |
| 20 | MODULE_DEVICE_TABLE(usb, id_table); |
| 21 | |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 22 | struct es1_ap_dev { |
| 23 | struct usb_device *usb_dev; |
| 24 | struct usb_interface *usb_intf; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 25 | struct greybus_host_device *hd; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 26 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 27 | __u8 control_endpoint; /* endpoint to send data to SVC */ |
| 28 | __u8 svc_endpoint; /* endpoint for SVC data */ |
| 29 | __u8 cport_in_endpoint; /* bulk in for CPort data */ |
| 30 | __u8 cport_out_endpoint; /* bulk out for CPort data */ |
| 31 | u8 *svc_buffer; /* buffer for SVC messages coming in */ |
| 32 | struct urb *svc_urb; /* urb for SVC messages coming in */ |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 33 | }; |
| 34 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 35 | static inline struct es1_ap_dev *hd_to_es1(struct greybus_host_device *hd) |
| 36 | { |
| 37 | return (struct es1_ap_dev *)(hd->hd_priv); |
| 38 | } |
| 39 | |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 40 | /* |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 41 | * Allocate the actual buffer for this gbuf and device and cport |
| 42 | * |
| 43 | * We are responsible for setting the following fields in a struct gbuf: |
| 44 | * void *hcpriv; |
| 45 | * void *transfer_buffer; |
| 46 | * u32 transfer_buffer_length; |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 47 | */ |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 48 | static int alloc_gbuf(struct gbuf *gbuf, unsigned int size, gfp_t gfp_mask) |
| 49 | { |
| 50 | struct es1_ap_dev *es1 = hd_to_es1(gbuf->gdev->hd); |
| 51 | u8 *buffer; |
| 52 | |
| 53 | /* For ES2 we need to figure out what cport is going to what endpoint, |
| 54 | * but for ES1, it's so dirt simple, we don't have a choice... |
| 55 | * |
| 56 | * Also, do a "slow" allocation now, if we need speed, use a cache |
| 57 | */ |
| 58 | buffer = kmalloc(size + 1, gfp_mask); |
| 59 | if (!buffer) |
| 60 | return -ENOMEM; |
| 61 | |
| 62 | /* |
| 63 | * we will encode the cport number in the first byte of the buffer, so |
| 64 | * set the second byte to be the "transfer buffer" |
| 65 | */ |
| 66 | buffer[0] = gbuf->cport->number; |
| 67 | gbuf->transfer_buffer = &buffer[1]; |
| 68 | gbuf->transfer_buffer_length = size; |
| 69 | |
| 70 | gbuf->hdpriv = es1; /* really, we could do something else here... */ |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | /* Free the memory we allocated with a gbuf */ |
| 76 | static void free_gbuf(struct gbuf *gbuf) |
| 77 | { |
| 78 | u8 *transfer_buffer; |
| 79 | u8 *buffer; |
| 80 | |
| 81 | transfer_buffer = gbuf->transfer_buffer; |
| 82 | buffer = &transfer_buffer[-1]; /* yes, we mean -1 */ |
| 83 | kfree(buffer); |
| 84 | } |
| 85 | |
Greg Kroah-Hartman | 43cc32a | 2014-09-07 13:51:12 -0700 | [diff] [blame] | 86 | static struct svc_msg *svc_msg_alloc(enum svc_function_type type) |
| 87 | { |
| 88 | struct svc_msg *svc_msg; |
| 89 | |
| 90 | svc_msg = kzalloc((sizeof *svc_msg), GFP_KERNEL); |
| 91 | if (!svc_msg) |
| 92 | return NULL; |
| 93 | |
| 94 | // FIXME - verify we are only sending message types we should be |
| 95 | svc_msg->header.type = type; |
| 96 | return svc_msg; |
| 97 | } |
| 98 | |
| 99 | static void svc_msg_free(struct svc_msg *svc_msg) |
| 100 | { |
| 101 | kfree(svc_msg); |
| 102 | } |
| 103 | |
| 104 | static int svc_msg_send(struct svc_msg *svc_msg) |
| 105 | { |
| 106 | // FIXME - Do something with this message! |
| 107 | |
| 108 | |
| 109 | svc_msg_free(svc_msg); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | |
| 114 | static void svc_handshake(struct svc_function_handshake *handshake, |
| 115 | struct es1_ap_dev *es1) |
| 116 | { |
| 117 | struct svc_msg *svc_msg; |
| 118 | |
| 119 | /* A new SVC communication channel, let's verify it was for us */ |
| 120 | if (handshake->handshake_type != SVC_HANDSHAKE_SVC_HELLO) { |
| 121 | /* we don't know what to do with this, log it and return */ |
| 122 | dev_dbg(&es1->usb_intf->dev, |
| 123 | "received invalid handshake type %d\n", |
| 124 | handshake->handshake_type); |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | /* Send back a AP_HELLO message */ |
| 129 | svc_msg = svc_msg_alloc(SVC_FUNCTION_HANDSHAKE); |
| 130 | if (!svc_msg) |
| 131 | return; |
| 132 | |
| 133 | svc_msg->handshake.handshake_type = SVC_HANDSHAKE_AP_HELLO; |
| 134 | svc_msg_send(svc_msg); |
| 135 | } |
| 136 | |
| 137 | static void svc_management(struct svc_function_unipro_management *management, |
| 138 | struct es1_ap_dev *es1) |
| 139 | { |
| 140 | /* What? An AP should not get this message */ |
| 141 | dev_err(&es1->usb_intf->dev, "Got an svc management message???\n"); |
| 142 | } |
| 143 | |
| 144 | static void svc_hotplug(struct svc_function_hotplug *hotplug, |
| 145 | struct es1_ap_dev *es1) |
| 146 | { |
| 147 | u8 module_id = hotplug->module_id; |
| 148 | |
| 149 | switch (hotplug->hotplug_event) { |
| 150 | case SVC_HOTPLUG_EVENT: |
| 151 | dev_dbg(&es1->usb_intf->dev, "module id %d added\n", |
| 152 | module_id); |
| 153 | // FIXME - add the module to the system |
| 154 | break; |
| 155 | |
| 156 | case SVC_HOTUNPLUG_EVENT: |
| 157 | dev_dbg(&es1->usb_intf->dev, "module id %d removed\n", |
| 158 | module_id); |
| 159 | // FIXME - remove the module from the system |
| 160 | break; |
| 161 | |
| 162 | default: |
| 163 | dev_err(&es1->usb_intf->dev, "received invalid hotplug message type %d\n", |
| 164 | hotplug->hotplug_event); |
| 165 | break; |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | static void svc_ddb(struct svc_function_ddb *ddb, struct es1_ap_dev *es1) |
| 170 | { |
| 171 | /* What? An AP should not get this message */ |
| 172 | dev_err(&es1->usb_intf->dev, "Got an svc DDB message???\n"); |
| 173 | } |
| 174 | |
| 175 | static void svc_power(struct svc_function_power *power, struct es1_ap_dev *es1) |
| 176 | { |
| 177 | u8 module_id = power->module_id; |
| 178 | |
| 179 | if (power->power_type != SVC_POWER_BATTERY_STATUS) { |
| 180 | dev_err(&es1->usb_intf->dev, "received invalid power type %d\n", |
| 181 | power->power_type); |
| 182 | return; |
| 183 | } |
| 184 | |
| 185 | dev_dbg(&es1->usb_intf->dev, "power status for module id %d is %d\n", |
| 186 | module_id, power->status.status); |
| 187 | |
| 188 | // FIXME - do something with the power information, like update our |
| 189 | // battery information... |
| 190 | } |
| 191 | |
| 192 | static void svc_epm(struct svc_function_epm *epm, struct es1_ap_dev *es1) |
| 193 | { |
| 194 | /* What? An AP should not get this message */ |
| 195 | dev_err(&es1->usb_intf->dev, "Got an EPM message???\n"); |
| 196 | } |
| 197 | |
| 198 | static void svc_suspend(struct svc_function_suspend *suspend, |
| 199 | struct es1_ap_dev *es1) |
| 200 | { |
| 201 | /* What? An AP should not get this message */ |
| 202 | dev_err(&es1->usb_intf->dev, "Got an suspend message???\n"); |
| 203 | } |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 204 | |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 205 | /* Main message loop for ap messages */ |
| 206 | /* Odds are, most of this logic can move to core.c someday, but as we only have |
| 207 | * one host controller driver for now, let's leave it here */ |
| 208 | static void ap_msg(struct svc_msg *svc_msg, struct greybus_host_device *hd) |
| 209 | { |
| 210 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
| 211 | |
| 212 | /* Look at the message to figure out what to do with it */ |
Greg Kroah-Hartman | 43cc32a | 2014-09-07 13:51:12 -0700 | [diff] [blame] | 213 | switch (svc_msg->header.type) { |
| 214 | case SVC_FUNCTION_HANDSHAKE: |
| 215 | svc_handshake(&svc_msg->handshake, es1); |
| 216 | break; |
| 217 | case SVC_FUNCTION_UNIPRO_NETWORK_MANAGEMENT: |
| 218 | svc_management(&svc_msg->management, es1); |
| 219 | break; |
| 220 | case SVC_FUNCTION_HOTPLUG: |
| 221 | svc_hotplug(&svc_msg->hotplug, es1); |
| 222 | break; |
| 223 | case SVC_FUNCTION_DDB: |
| 224 | svc_ddb(&svc_msg->ddb, es1); |
| 225 | break; |
| 226 | case SVC_FUNCTION_POWER: |
| 227 | svc_power(&svc_msg->power, es1); |
| 228 | break; |
| 229 | case SVC_FUNCTION_EPM: |
| 230 | svc_epm(&svc_msg->epm, es1); |
| 231 | break; |
| 232 | case SVC_FUNCTION_SUSPEND: |
| 233 | svc_suspend(&svc_msg->suspend, es1); |
| 234 | break; |
| 235 | default: |
| 236 | dev_err(&es1->usb_intf->dev, "received invalid SVC message type %d\n", |
| 237 | svc_msg->header.type); |
| 238 | } |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 242 | static struct greybus_host_driver es1_driver = { |
| 243 | .hd_priv_size = sizeof(struct es1_ap_dev), |
| 244 | .alloc_gbuf = alloc_gbuf, |
| 245 | .free_gbuf = free_gbuf, |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 246 | .ap_msg = ap_msg, |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 247 | }; |
| 248 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 249 | /* Callback for when we get a SVC message */ |
| 250 | static void svc_callback(struct urb *urb) |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 251 | { |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 252 | struct es1_ap_dev *es1 = urb->context; |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 253 | struct device *dev = &urb->dev->dev; |
| 254 | int status = urb->status; |
| 255 | int retval; |
| 256 | |
| 257 | switch (status) { |
| 258 | case 0: |
| 259 | break; |
| 260 | case -EOVERFLOW: |
| 261 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 262 | __func__, urb->actual_length); |
| 263 | case -ECONNRESET: |
| 264 | case -ENOENT: |
| 265 | case -ESHUTDOWN: |
| 266 | case -EILSEQ: |
| 267 | /* device is gone, stop sending */ |
| 268 | return; |
| 269 | default: |
| 270 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 271 | goto exit; |
| 272 | } |
| 273 | |
| 274 | /* We have a message, create a new message structure, add it to the |
| 275 | * list, and wake up our thread that will process the messages. |
| 276 | */ |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 277 | gb_new_ap_msg(urb->transfer_buffer, urb->actual_length, es1->hd); |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 278 | |
| 279 | exit: |
| 280 | /* resubmit the urb to get more messages */ |
| 281 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 282 | if (retval) |
| 283 | dev_err(dev, "Can not submit urb for AP data: %d\n", retval); |
| 284 | } |
| 285 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 286 | void cport_in_callback(struct urb *urb) |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 287 | { |
| 288 | struct device *dev = &urb->dev->dev; |
| 289 | int status = urb->status; |
| 290 | |
| 291 | switch (status) { |
| 292 | case 0: |
| 293 | break; |
| 294 | case -EOVERFLOW: |
| 295 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 296 | __func__, urb->actual_length); |
| 297 | case -ECONNRESET: |
| 298 | case -ENOENT: |
| 299 | case -ESHUTDOWN: |
| 300 | case -EILSEQ: |
| 301 | /* device is gone, stop sending */ |
| 302 | return; |
| 303 | default: |
| 304 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 305 | goto exit; |
| 306 | } |
| 307 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 308 | // FIXME - handle the CPort in data |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 309 | exit: |
| 310 | return; |
| 311 | } |
| 312 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 313 | void cport_out_callback(struct urb *urb) |
| 314 | { |
| 315 | struct device *dev = &urb->dev->dev; |
| 316 | int status = urb->status; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 317 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 318 | switch (status) { |
| 319 | case 0: |
| 320 | break; |
| 321 | case -EOVERFLOW: |
| 322 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 323 | __func__, urb->actual_length); |
| 324 | case -ECONNRESET: |
| 325 | case -ENOENT: |
| 326 | case -ESHUTDOWN: |
| 327 | case -EILSEQ: |
| 328 | /* device is gone, stop sending */ |
| 329 | return; |
| 330 | default: |
| 331 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 332 | goto exit; |
| 333 | } |
| 334 | |
| 335 | // FIXME - handle the CPort out data callback |
| 336 | exit: |
| 337 | return; |
| 338 | } |
| 339 | |
| 340 | /* |
| 341 | * The ES1 USB Bridge device contains 4 endpoints |
| 342 | * 1 Control - usual USB stuff + AP -> SVC messages |
| 343 | * 1 Interrupt IN - SVC -> AP messages |
| 344 | * 1 Bulk IN - CPort data in |
| 345 | * 1 Bulk OUT - CPorta data out |
| 346 | */ |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 347 | static int ap_probe(struct usb_interface *interface, |
| 348 | const struct usb_device_id *id) |
| 349 | { |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 350 | struct es1_ap_dev *es1; |
| 351 | struct greybus_host_device *hd; |
| 352 | struct usb_device *udev; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 353 | struct usb_host_interface *iface_desc; |
| 354 | struct usb_endpoint_descriptor *endpoint; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 355 | bool int_in_found = false; |
| 356 | bool bulk_in_found = false; |
| 357 | bool bulk_out_found = false; |
| 358 | int retval = -ENOMEM; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 359 | int i; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 360 | int buffer_size = 0; |
| 361 | u8 svc_interval = 0; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 362 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 363 | udev = usb_get_dev(interface_to_usbdev(interface)); |
| 364 | |
| 365 | hd = greybus_create_hd(&es1_driver, &udev->dev); |
| 366 | if (!hd) |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 367 | return -ENOMEM; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 368 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 369 | es1 = hd_to_es1(hd); |
| 370 | es1->hd = hd; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 371 | es1->usb_intf = interface; |
| 372 | es1->usb_dev = udev; |
| 373 | usb_set_intfdata(interface, es1); |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 374 | |
| 375 | /* Control endpoint is the pipe to talk to this AP, so save it off */ |
| 376 | endpoint = &udev->ep0.desc; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 377 | es1->control_endpoint = endpoint->bEndpointAddress; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 378 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 379 | /* find all 3 of our endpoints */ |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 380 | iface_desc = interface->cur_altsetting; |
| 381 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 382 | endpoint = &iface_desc->endpoint[i].desc; |
| 383 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 384 | if (usb_endpoint_is_int_in(endpoint)) { |
| 385 | es1->svc_endpoint = endpoint->bEndpointAddress; |
| 386 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 387 | svc_interval = endpoint->bInterval; |
| 388 | int_in_found = true; |
| 389 | } else if (usb_endpoint_is_bulk_in(endpoint)) { |
| 390 | es1->cport_in_endpoint = endpoint->bEndpointAddress; |
| 391 | bulk_in_found = true; |
| 392 | } else if (usb_endpoint_is_bulk_out(endpoint)) { |
| 393 | es1->cport_out_endpoint = endpoint->bEndpointAddress; |
| 394 | bulk_out_found = true; |
| 395 | } else { |
| 396 | dev_err(&udev->dev, |
| 397 | "Unknown endpoint type found, address %x\n", |
| 398 | endpoint->bEndpointAddress); |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 399 | } |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 400 | } |
| 401 | if ((int_in_found == false) || |
| 402 | (bulk_in_found == false) || |
| 403 | (bulk_out_found == false)) { |
| 404 | dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n"); |
| 405 | goto error; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 406 | } |
| 407 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 408 | /* Create our buffer and URB to get SVC messages, and start it up */ |
| 409 | es1->svc_buffer = kmalloc(buffer_size, GFP_KERNEL); |
| 410 | if (!es1->svc_buffer) |
| 411 | goto error; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 412 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 413 | es1->svc_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 414 | if (!es1->svc_urb) |
| 415 | goto error_urb; |
| 416 | |
| 417 | usb_fill_int_urb(es1->svc_urb, udev, |
| 418 | usb_rcvintpipe(udev, es1->svc_endpoint), |
| 419 | es1->svc_buffer, buffer_size, svc_callback, |
| 420 | es1, svc_interval); |
| 421 | retval = usb_submit_urb(es1->svc_urb, GFP_KERNEL); |
| 422 | if (retval) |
| 423 | goto error_submit_urb; |
| 424 | |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 425 | return 0; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 426 | |
| 427 | error_submit_urb: |
| 428 | usb_free_urb(es1->svc_urb); |
| 429 | error_urb: |
| 430 | kfree(es1->svc_buffer); |
| 431 | error: |
| 432 | greybus_remove_hd(es1->hd); |
| 433 | return retval; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | static void ap_disconnect(struct usb_interface *interface) |
| 437 | { |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 438 | struct es1_ap_dev *es1; |
| 439 | |
| 440 | es1 = usb_get_intfdata(interface); |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 441 | |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 442 | /* Tear down everything! */ |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 443 | usb_kill_urb(es1->svc_urb); |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 444 | usb_put_dev(es1->usb_dev); |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 445 | kfree(es1->svc_buffer); |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 446 | greybus_remove_hd(es1->hd); |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame^] | 447 | usb_set_intfdata(interface, NULL); |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | static struct usb_driver es1_ap_driver = { |
| 451 | .name = "es1_ap_driver", |
| 452 | .probe = ap_probe, |
| 453 | .disconnect = ap_disconnect, |
| 454 | .id_table = id_table, |
| 455 | }; |
| 456 | |
| 457 | module_usb_driver(es1_ap_driver); |
| 458 | |
| 459 | MODULE_LICENSE("GPL"); |
| 460 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |