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 | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 22 | /* |
| 23 | * Number of CPort IN urbs in flight at any point in time. |
| 24 | * Adjust if we are having stalls in the USB buffer due to not enough urbs in |
| 25 | * flight. |
| 26 | */ |
| 27 | #define NUM_CPORT_IN_URB 4 |
| 28 | |
| 29 | /* Number of CPort OUT urbs in flight at any point in time. |
| 30 | * Adjust if we get messages saying we are out of urbs in the system log. |
| 31 | */ |
| 32 | #define NUM_CPORT_OUT_URB 8 |
| 33 | |
| 34 | |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 35 | struct es1_ap_dev { |
| 36 | struct usb_device *usb_dev; |
| 37 | struct usb_interface *usb_intf; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 38 | struct greybus_host_device *hd; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 39 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 40 | __u8 control_endpoint; /* endpoint to send data to SVC */ |
| 41 | __u8 svc_endpoint; /* endpoint for SVC data */ |
| 42 | __u8 cport_in_endpoint; /* bulk in for CPort data */ |
| 43 | __u8 cport_out_endpoint; /* bulk out for CPort data */ |
| 44 | u8 *svc_buffer; /* buffer for SVC messages coming in */ |
| 45 | struct urb *svc_urb; /* urb for SVC messages coming in */ |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 46 | struct urb *cport_in_urb[NUM_CPORT_IN_URB]; /* CPort IN urbs */ |
| 47 | u8 *cport_in_buffer[NUM_CPORT_IN_URB]; /* CPort IN buffers */ |
| 48 | struct urb *cport_out_urb[NUM_CPORT_OUT_URB]; /* CPort OUT urbs */ |
Greg Kroah-Hartman | 0dad95d | 2014-09-13 09:54:35 -0700 | [diff] [blame^] | 49 | bool cport_out_urb_busy[NUM_CPORT_OUT_URB]; /* CPort OUT urb busy marker */ |
| 50 | spinlock_t cport_out_urb_lock; /* locks list of cport out urbs */ |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 51 | }; |
| 52 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 53 | static inline struct es1_ap_dev *hd_to_es1(struct greybus_host_device *hd) |
| 54 | { |
| 55 | return (struct es1_ap_dev *)(hd->hd_priv); |
| 56 | } |
| 57 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 58 | static void cport_out_callback(struct urb *urb); |
| 59 | |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 60 | /* |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 61 | * Allocate the actual buffer for this gbuf and device and cport |
| 62 | * |
| 63 | * We are responsible for setting the following fields in a struct gbuf: |
| 64 | * void *hcpriv; |
| 65 | * void *transfer_buffer; |
| 66 | * u32 transfer_buffer_length; |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 67 | */ |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 68 | static int alloc_gbuf(struct gbuf *gbuf, unsigned int size, gfp_t gfp_mask) |
| 69 | { |
| 70 | struct es1_ap_dev *es1 = hd_to_es1(gbuf->gdev->hd); |
| 71 | u8 *buffer; |
| 72 | |
| 73 | /* For ES2 we need to figure out what cport is going to what endpoint, |
| 74 | * but for ES1, it's so dirt simple, we don't have a choice... |
| 75 | * |
| 76 | * Also, do a "slow" allocation now, if we need speed, use a cache |
| 77 | */ |
| 78 | buffer = kmalloc(size + 1, gfp_mask); |
| 79 | if (!buffer) |
| 80 | return -ENOMEM; |
| 81 | |
| 82 | /* |
| 83 | * we will encode the cport number in the first byte of the buffer, so |
| 84 | * set the second byte to be the "transfer buffer" |
| 85 | */ |
| 86 | buffer[0] = gbuf->cport->number; |
| 87 | gbuf->transfer_buffer = &buffer[1]; |
| 88 | gbuf->transfer_buffer_length = size; |
| 89 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 90 | /* When we send the gbuf, we need this pointer to be here */ |
| 91 | gbuf->hdpriv = es1; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
| 96 | /* Free the memory we allocated with a gbuf */ |
| 97 | static void free_gbuf(struct gbuf *gbuf) |
| 98 | { |
| 99 | u8 *transfer_buffer; |
| 100 | u8 *buffer; |
| 101 | |
| 102 | transfer_buffer = gbuf->transfer_buffer; |
| 103 | buffer = &transfer_buffer[-1]; /* yes, we mean -1 */ |
| 104 | kfree(buffer); |
| 105 | } |
| 106 | |
Greg Kroah-Hartman | 8c53e07 | 2014-09-12 20:47:11 -0700 | [diff] [blame] | 107 | #define ES1_TIMEOUT 500 /* 500 ms for the SVC to do something */ |
| 108 | static int send_svc_msg(struct svc_msg *svc_msg, struct greybus_host_device *hd) |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 109 | { |
| 110 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
Greg Kroah-Hartman | 8c53e07 | 2014-09-12 20:47:11 -0700 | [diff] [blame] | 111 | int retval; |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 112 | |
Greg Kroah-Hartman | 8c53e07 | 2014-09-12 20:47:11 -0700 | [diff] [blame] | 113 | /* SVC messages go down our control pipe */ |
| 114 | retval = usb_control_msg(es1->usb_dev, |
| 115 | usb_sndctrlpipe(es1->usb_dev, |
| 116 | es1->control_endpoint), |
| 117 | 0x01, /* vendor request AP message */ |
| 118 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER, |
| 119 | 0x00, 0x00, |
| 120 | (char *)svc_msg, |
| 121 | sizeof(*svc_msg), |
| 122 | ES1_TIMEOUT); |
| 123 | if (retval != sizeof(*svc_msg)) |
| 124 | return retval; |
| 125 | |
| 126 | return 0; |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 127 | } |
| 128 | |
Greg Kroah-Hartman | 0dad95d | 2014-09-13 09:54:35 -0700 | [diff] [blame^] | 129 | static struct urb *next_free_urb(struct es1_ap_dev *es1, gfp_t gfp_mask) |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 130 | { |
Greg Kroah-Hartman | 0dad95d | 2014-09-13 09:54:35 -0700 | [diff] [blame^] | 131 | struct urb *urb = NULL; |
| 132 | unsigned long flags; |
| 133 | int i; |
| 134 | |
| 135 | spin_lock_irqsave(&es1->cport_out_urb_lock, flags); |
| 136 | |
| 137 | /* Look in our pool of allocated urbs first, as that's the "fastest" */ |
| 138 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 139 | if (es1->cport_out_urb_busy[i] == false) { |
| 140 | es1->cport_out_urb_busy[i] = true; |
| 141 | urb = es1->cport_out_urb[i]; |
| 142 | break; |
| 143 | } |
| 144 | } |
| 145 | spin_unlock_irqrestore(&es1->cport_out_urb_lock, flags); |
| 146 | if (urb) |
| 147 | return urb; |
| 148 | |
| 149 | /* |
| 150 | * Crap, pool is empty, complain to the syslog and go allocate one |
| 151 | * dynamically as we have to succeed. |
| 152 | */ |
| 153 | dev_err(&es1->usb_dev->dev, |
| 154 | "No free CPort OUT urbs, having to dynamically allocate one!\n"); |
| 155 | urb = usb_alloc_urb(0, gfp_mask); |
| 156 | if (!urb) |
| 157 | return NULL; |
| 158 | |
| 159 | return urb; |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 160 | } |
| 161 | |
| 162 | static int send_gbuf(struct gbuf *gbuf, struct greybus_host_device *hd, |
| 163 | gfp_t gfp_mask) |
| 164 | { |
| 165 | struct es1_ap_dev *es1 = hd_to_es1(hd); |
| 166 | struct usb_device *udev = es1->usb_dev; |
| 167 | int retval; |
| 168 | u8 *transfer_buffer; |
| 169 | u8 *buffer; |
| 170 | struct urb *urb; |
| 171 | |
| 172 | transfer_buffer = gbuf->transfer_buffer; |
| 173 | buffer = &transfer_buffer[-1]; /* yes, we mean -1 */ |
| 174 | |
| 175 | /* Find a free urb */ |
Greg Kroah-Hartman | 0dad95d | 2014-09-13 09:54:35 -0700 | [diff] [blame^] | 176 | urb = next_free_urb(es1, gfp_mask); |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 177 | if (!urb) |
| 178 | return -ENOMEM; |
| 179 | |
| 180 | usb_fill_bulk_urb(urb, udev, |
| 181 | usb_sndbulkpipe(udev, es1->cport_out_endpoint), |
| 182 | buffer, gbuf->transfer_buffer_length + 1, |
| 183 | cport_out_callback, gbuf); |
| 184 | retval = usb_submit_urb(urb, gfp_mask); |
| 185 | return retval; |
| 186 | } |
| 187 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 188 | static struct greybus_host_driver es1_driver = { |
| 189 | .hd_priv_size = sizeof(struct es1_ap_dev), |
| 190 | .alloc_gbuf = alloc_gbuf, |
| 191 | .free_gbuf = free_gbuf, |
Greg Kroah-Hartman | 8c53e07 | 2014-09-12 20:47:11 -0700 | [diff] [blame] | 192 | .send_svc_msg = send_svc_msg, |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 193 | .send_gbuf = send_gbuf, |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 194 | }; |
| 195 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 196 | /* Callback for when we get a SVC message */ |
| 197 | static void svc_callback(struct urb *urb) |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 198 | { |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 199 | struct es1_ap_dev *es1 = urb->context; |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 200 | struct device *dev = &urb->dev->dev; |
| 201 | int status = urb->status; |
| 202 | int retval; |
| 203 | |
| 204 | switch (status) { |
| 205 | case 0: |
| 206 | break; |
| 207 | case -EOVERFLOW: |
| 208 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 209 | __func__, urb->actual_length); |
| 210 | case -ECONNRESET: |
| 211 | case -ENOENT: |
| 212 | case -ESHUTDOWN: |
| 213 | case -EILSEQ: |
| 214 | /* device is gone, stop sending */ |
| 215 | return; |
| 216 | default: |
| 217 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 218 | goto exit; |
| 219 | } |
| 220 | |
| 221 | /* We have a message, create a new message structure, add it to the |
| 222 | * list, and wake up our thread that will process the messages. |
| 223 | */ |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 224 | 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] | 225 | |
| 226 | exit: |
| 227 | /* resubmit the urb to get more messages */ |
| 228 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
| 229 | if (retval) |
| 230 | dev_err(dev, "Can not submit urb for AP data: %d\n", retval); |
| 231 | } |
| 232 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 233 | static void cport_in_callback(struct urb *urb) |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 234 | { |
| 235 | struct device *dev = &urb->dev->dev; |
| 236 | int status = urb->status; |
| 237 | |
| 238 | switch (status) { |
| 239 | case 0: |
| 240 | break; |
| 241 | case -EOVERFLOW: |
| 242 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 243 | __func__, urb->actual_length); |
| 244 | case -ECONNRESET: |
| 245 | case -ENOENT: |
| 246 | case -ESHUTDOWN: |
| 247 | case -EILSEQ: |
| 248 | /* device is gone, stop sending */ |
| 249 | return; |
| 250 | default: |
| 251 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 252 | goto exit; |
| 253 | } |
| 254 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 255 | // FIXME - handle the CPort in data |
Greg Kroah-Hartman | de536e3 | 2014-08-31 16:17:04 -0700 | [diff] [blame] | 256 | exit: |
| 257 | return; |
| 258 | } |
| 259 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 260 | static void cport_out_callback(struct urb *urb) |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 261 | { |
| 262 | struct device *dev = &urb->dev->dev; |
| 263 | int status = urb->status; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 264 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 265 | switch (status) { |
| 266 | case 0: |
| 267 | break; |
| 268 | case -EOVERFLOW: |
| 269 | dev_err(dev, "%s: overflow actual length is %d\n", |
| 270 | __func__, urb->actual_length); |
| 271 | case -ECONNRESET: |
| 272 | case -ENOENT: |
| 273 | case -ESHUTDOWN: |
| 274 | case -EILSEQ: |
| 275 | /* device is gone, stop sending */ |
| 276 | return; |
| 277 | default: |
| 278 | dev_err(dev, "%s: unknown status %d\n", __func__, status); |
| 279 | goto exit; |
| 280 | } |
| 281 | |
| 282 | // FIXME - handle the CPort out data callback |
| 283 | exit: |
| 284 | return; |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * The ES1 USB Bridge device contains 4 endpoints |
| 289 | * 1 Control - usual USB stuff + AP -> SVC messages |
| 290 | * 1 Interrupt IN - SVC -> AP messages |
| 291 | * 1 Bulk IN - CPort data in |
| 292 | * 1 Bulk OUT - CPorta data out |
| 293 | */ |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 294 | static int ap_probe(struct usb_interface *interface, |
| 295 | const struct usb_device_id *id) |
| 296 | { |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 297 | struct es1_ap_dev *es1; |
| 298 | struct greybus_host_device *hd; |
| 299 | struct usb_device *udev; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 300 | struct usb_host_interface *iface_desc; |
| 301 | struct usb_endpoint_descriptor *endpoint; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 302 | bool int_in_found = false; |
| 303 | bool bulk_in_found = false; |
| 304 | bool bulk_out_found = false; |
| 305 | int retval = -ENOMEM; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 306 | int i; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 307 | int buffer_size = 0; |
| 308 | u8 svc_interval = 0; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 309 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 310 | udev = usb_get_dev(interface_to_usbdev(interface)); |
| 311 | |
| 312 | hd = greybus_create_hd(&es1_driver, &udev->dev); |
| 313 | if (!hd) |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 314 | return -ENOMEM; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 315 | |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 316 | es1 = hd_to_es1(hd); |
| 317 | es1->hd = hd; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 318 | es1->usb_intf = interface; |
| 319 | es1->usb_dev = udev; |
Greg Kroah-Hartman | 0dad95d | 2014-09-13 09:54:35 -0700 | [diff] [blame^] | 320 | spin_lock_init(&es1->cport_out_urb_lock); |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 321 | usb_set_intfdata(interface, es1); |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 322 | |
| 323 | /* Control endpoint is the pipe to talk to this AP, so save it off */ |
| 324 | endpoint = &udev->ep0.desc; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 325 | es1->control_endpoint = endpoint->bEndpointAddress; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 326 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 327 | /* find all 3 of our endpoints */ |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 328 | iface_desc = interface->cur_altsetting; |
| 329 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { |
| 330 | endpoint = &iface_desc->endpoint[i].desc; |
| 331 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 332 | if (usb_endpoint_is_int_in(endpoint)) { |
| 333 | es1->svc_endpoint = endpoint->bEndpointAddress; |
| 334 | buffer_size = le16_to_cpu(endpoint->wMaxPacketSize); |
| 335 | svc_interval = endpoint->bInterval; |
| 336 | int_in_found = true; |
| 337 | } else if (usb_endpoint_is_bulk_in(endpoint)) { |
| 338 | es1->cport_in_endpoint = endpoint->bEndpointAddress; |
| 339 | bulk_in_found = true; |
| 340 | } else if (usb_endpoint_is_bulk_out(endpoint)) { |
| 341 | es1->cport_out_endpoint = endpoint->bEndpointAddress; |
| 342 | bulk_out_found = true; |
| 343 | } else { |
| 344 | dev_err(&udev->dev, |
| 345 | "Unknown endpoint type found, address %x\n", |
| 346 | endpoint->bEndpointAddress); |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 347 | } |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 348 | } |
| 349 | if ((int_in_found == false) || |
| 350 | (bulk_in_found == false) || |
| 351 | (bulk_out_found == false)) { |
| 352 | dev_err(&udev->dev, "Not enough endpoints found in device, aborting!\n"); |
| 353 | goto error; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 354 | } |
| 355 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 356 | /* Create our buffer and URB to get SVC messages, and start it up */ |
| 357 | es1->svc_buffer = kmalloc(buffer_size, GFP_KERNEL); |
| 358 | if (!es1->svc_buffer) |
| 359 | goto error; |
Greg Kroah-Hartman | 6f83ab7 | 2014-08-30 17:30:04 -0700 | [diff] [blame] | 360 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 361 | es1->svc_urb = usb_alloc_urb(0, GFP_KERNEL); |
| 362 | if (!es1->svc_urb) |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 363 | goto error_int_urb; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 364 | |
| 365 | usb_fill_int_urb(es1->svc_urb, udev, |
| 366 | usb_rcvintpipe(udev, es1->svc_endpoint), |
| 367 | es1->svc_buffer, buffer_size, svc_callback, |
| 368 | es1, svc_interval); |
| 369 | retval = usb_submit_urb(es1->svc_urb, GFP_KERNEL); |
| 370 | if (retval) |
| 371 | goto error_submit_urb; |
| 372 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 373 | /* Allocate buffers for our cport in messages and start them up */ |
| 374 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 375 | struct urb *urb; |
| 376 | u8 *buffer; |
| 377 | |
| 378 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 379 | if (!urb) |
| 380 | goto error_bulk_in_urb; |
| 381 | buffer = kmalloc(PAGE_SIZE, GFP_KERNEL); |
| 382 | if (!buffer) |
| 383 | goto error_bulk_in_urb; |
| 384 | |
| 385 | usb_fill_bulk_urb(urb, udev, |
| 386 | usb_rcvbulkpipe(udev, es1->cport_in_endpoint), |
| 387 | buffer, PAGE_SIZE, cport_in_callback, es1); |
| 388 | es1->cport_in_urb[i] = urb; |
| 389 | es1->cport_in_buffer[i] = buffer; |
| 390 | retval = usb_submit_urb(urb, GFP_KERNEL); |
| 391 | if (retval) |
| 392 | goto error_bulk_in_urb; |
| 393 | } |
| 394 | |
| 395 | /* Allocate urbs for our CPort OUT messages */ |
| 396 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 397 | struct urb *urb; |
| 398 | |
| 399 | urb = usb_alloc_urb(0, GFP_KERNEL); |
| 400 | if (!urb) |
| 401 | goto error_bulk_out_urb; |
| 402 | |
| 403 | es1->cport_out_urb[i] = urb; |
| 404 | es1->cport_out_urb_busy[i] = false; /* just to be anal */ |
| 405 | } |
| 406 | |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 407 | return 0; |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 408 | |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 409 | error_bulk_out_urb: |
| 410 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) |
| 411 | usb_free_urb(es1->cport_out_urb[i]); |
| 412 | |
| 413 | error_bulk_in_urb: |
| 414 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 415 | usb_kill_urb(es1->cport_in_urb[i]); |
| 416 | usb_free_urb(es1->cport_in_urb[i]); |
| 417 | kfree(es1->cport_in_buffer[i]); |
| 418 | } |
| 419 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 420 | error_submit_urb: |
| 421 | usb_free_urb(es1->svc_urb); |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 422 | error_int_urb: |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 423 | kfree(es1->svc_buffer); |
| 424 | error: |
| 425 | greybus_remove_hd(es1->hd); |
| 426 | return retval; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 427 | } |
| 428 | |
| 429 | static void ap_disconnect(struct usb_interface *interface) |
| 430 | { |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 431 | struct es1_ap_dev *es1; |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 432 | int i; |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 433 | |
| 434 | es1 = usb_get_intfdata(interface); |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 435 | if (!es1) |
| 436 | return; |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 437 | |
Greg Kroah-Hartman | f1eec30 | 2014-08-30 17:18:14 -0700 | [diff] [blame] | 438 | /* Tear down everything! */ |
Greg Kroah-Hartman | 1129973 | 2014-09-12 21:17:37 -0700 | [diff] [blame] | 439 | for (i = 0; i < NUM_CPORT_OUT_URB; ++i) { |
| 440 | usb_kill_urb(es1->cport_out_urb[i]); |
| 441 | usb_free_urb(es1->cport_out_urb[i]); |
| 442 | } |
| 443 | |
| 444 | for (i = 0; i < NUM_CPORT_IN_URB; ++i) { |
| 445 | usb_kill_urb(es1->cport_in_urb[i]); |
| 446 | usb_free_urb(es1->cport_in_urb[i]); |
| 447 | kfree(es1->cport_in_buffer[i]); |
| 448 | } |
| 449 | |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 450 | usb_kill_urb(es1->svc_urb); |
Greg Kroah-Hartman | d9d077f | 2014-09-08 20:11:18 -0700 | [diff] [blame] | 451 | usb_free_urb(es1->svc_urb); |
Greg Kroah-Hartman | a39879f | 2014-09-06 16:57:36 -0700 | [diff] [blame] | 452 | usb_put_dev(es1->usb_dev); |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 453 | kfree(es1->svc_buffer); |
Greg Kroah-Hartman | 68f1fc4 | 2014-09-07 13:12:11 -0700 | [diff] [blame] | 454 | greybus_remove_hd(es1->hd); |
Greg Kroah-Hartman | 47f6ef1 | 2014-09-08 20:09:08 -0700 | [diff] [blame] | 455 | usb_set_intfdata(interface, NULL); |
Greg Kroah-Hartman | ba4468d4 | 2014-08-30 17:06:54 -0700 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static struct usb_driver es1_ap_driver = { |
| 459 | .name = "es1_ap_driver", |
| 460 | .probe = ap_probe, |
| 461 | .disconnect = ap_disconnect, |
| 462 | .id_table = id_table, |
| 463 | }; |
| 464 | |
| 465 | module_usb_driver(es1_ap_driver); |
| 466 | |
| 467 | MODULE_LICENSE("GPL"); |
| 468 | MODULE_AUTHOR("Greg Kroah-Hartman <gregkh@linuxfoundation.org>"); |