Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------------- |
| 2 | * Copyright (c) 2011 Ozmo Inc |
| 3 | * Released under the GNU General Public License Version 2 (GPLv2). |
| 4 | * |
| 5 | * This file provides the implementation of a USB host controller device that |
| 6 | * does not have any associated hardware. Instead the virtual device is |
| 7 | * connected to the WiFi network and emulates the operation of a USB hcd by |
| 8 | * receiving and sending network frames. |
| 9 | * Note: |
| 10 | * We take great pains to reduce the amount of code where interrupts need to be |
| 11 | * disabled and in this respect we are different from standard HCD's. In |
| 12 | * particular we don't want in_irq() code bleeding over to the protocol side of |
| 13 | * the driver. |
| 14 | * The troublesome functions are the urb enqueue and dequeue functions both of |
| 15 | * which can be called in_irq(). So for these functions we put the urbs into a |
| 16 | * queue and request a tasklet to process them. This means that a spinlock with |
| 17 | * interrupts disabled must be held for insertion and removal but most code is |
| 18 | * is in tasklet or soft irq context. The lock that protects this list is called |
| 19 | * the tasklet lock and serves the purpose of the 'HCD lock' which must be held |
| 20 | * when calling the following functions. |
| 21 | * usb_hcd_link_urb_to_ep() |
| 22 | * usb_hcd_unlink_urb_from_ep() |
| 23 | * usb_hcd_flush_endpoint() |
| 24 | * usb_hcd_check_unlink_urb() |
| 25 | * ----------------------------------------------------------------------------- |
| 26 | */ |
| 27 | #include <linux/platform_device.h> |
| 28 | #include <linux/usb.h> |
| 29 | #include <linux/jiffies.h> |
| 30 | #include <linux/slab.h> |
| 31 | #include <linux/export.h> |
| 32 | #include "linux/usb/hcd.h" |
| 33 | #include <asm/unaligned.h> |
| 34 | #include "ozconfig.h" |
| 35 | #include "ozusbif.h" |
| 36 | #include "oztrace.h" |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 37 | #include "ozurbparanoia.h" |
| 38 | #include "ozevent.h" |
| 39 | /*------------------------------------------------------------------------------ |
| 40 | * Number of units of buffering to capture for an isochronous IN endpoint before |
| 41 | * allowing data to be indicated up. |
| 42 | */ |
| 43 | #define OZ_IN_BUFFERING_UNITS 50 |
| 44 | /* Name of our platform device. |
| 45 | */ |
| 46 | #define OZ_PLAT_DEV_NAME "ozwpan" |
| 47 | /* Maximum number of free urb links that can be kept in the pool. |
| 48 | */ |
| 49 | #define OZ_MAX_LINK_POOL_SIZE 16 |
| 50 | /* Get endpoint object from the containing link. |
| 51 | */ |
| 52 | #define ep_from_link(__e) container_of((__e), struct oz_endpoint, link) |
| 53 | /*------------------------------------------------------------------------------ |
| 54 | * Used to link urbs together and also store some status information for each |
| 55 | * urb. |
| 56 | * A cache of these are kept in a pool to reduce number of calls to kmalloc. |
| 57 | */ |
| 58 | struct oz_urb_link { |
| 59 | struct list_head link; |
| 60 | struct urb *urb; |
| 61 | struct oz_port *port; |
| 62 | u8 req_id; |
| 63 | u8 ep_num; |
| 64 | unsigned long submit_jiffies; |
| 65 | }; |
| 66 | |
| 67 | /* Holds state information about a USB endpoint. |
| 68 | */ |
| 69 | struct oz_endpoint { |
| 70 | struct list_head urb_list; /* List of oz_urb_link items. */ |
| 71 | struct list_head link; /* For isoc ep, links in to isoc |
| 72 | lists of oz_port. */ |
| 73 | unsigned long last_jiffies; |
| 74 | int credit; |
| 75 | int credit_ceiling; |
| 76 | u8 ep_num; |
| 77 | u8 attrib; |
| 78 | u8 *buffer; |
| 79 | int buffer_size; |
| 80 | int in_ix; |
| 81 | int out_ix; |
| 82 | int buffered_units; |
| 83 | unsigned flags; |
| 84 | int start_frame; |
| 85 | }; |
| 86 | /* Bits in the flags field. */ |
| 87 | #define OZ_F_EP_BUFFERING 0x1 |
| 88 | #define OZ_F_EP_HAVE_STREAM 0x2 |
| 89 | |
| 90 | /* Holds state information about a USB interface. |
| 91 | */ |
| 92 | struct oz_interface { |
| 93 | unsigned ep_mask; |
| 94 | u8 alt; |
| 95 | }; |
| 96 | |
| 97 | /* Holds state information about an hcd port. |
| 98 | */ |
| 99 | #define OZ_NB_ENDPOINTS 16 |
| 100 | struct oz_port { |
| 101 | unsigned flags; |
| 102 | unsigned status; |
| 103 | void *hpd; |
| 104 | struct oz_hcd *ozhcd; |
| 105 | spinlock_t port_lock; |
| 106 | u8 bus_addr; |
| 107 | u8 next_req_id; |
| 108 | u8 config_num; |
| 109 | int num_iface; |
| 110 | struct oz_interface *iface; |
| 111 | struct oz_endpoint *out_ep[OZ_NB_ENDPOINTS]; |
| 112 | struct oz_endpoint *in_ep[OZ_NB_ENDPOINTS]; |
| 113 | struct list_head isoc_out_ep; |
| 114 | struct list_head isoc_in_ep; |
| 115 | }; |
| 116 | #define OZ_PORT_F_PRESENT 0x1 |
| 117 | #define OZ_PORT_F_CHANGED 0x2 |
| 118 | #define OZ_PORT_F_DYING 0x4 |
| 119 | |
| 120 | /* Data structure in the private context area of struct usb_hcd. |
| 121 | */ |
| 122 | #define OZ_NB_PORTS 8 |
| 123 | struct oz_hcd { |
| 124 | spinlock_t hcd_lock; |
| 125 | struct list_head urb_pending_list; |
| 126 | struct list_head urb_cancel_list; |
| 127 | struct list_head orphanage; |
| 128 | int conn_port; /* Port that is currently connecting, -1 if none.*/ |
| 129 | struct oz_port ports[OZ_NB_PORTS]; |
| 130 | uint flags; |
| 131 | struct usb_hcd *hcd; |
| 132 | }; |
| 133 | /* Bits in flags field. |
| 134 | */ |
| 135 | #define OZ_HDC_F_SUSPENDED 0x1 |
| 136 | |
| 137 | /*------------------------------------------------------------------------------ |
| 138 | * Static function prototypes. |
| 139 | */ |
| 140 | static int oz_hcd_start(struct usb_hcd *hcd); |
| 141 | static void oz_hcd_stop(struct usb_hcd *hcd); |
| 142 | static void oz_hcd_shutdown(struct usb_hcd *hcd); |
| 143 | static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 144 | gfp_t mem_flags); |
| 145 | static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); |
| 146 | static void oz_hcd_endpoint_disable(struct usb_hcd *hcd, |
| 147 | struct usb_host_endpoint *ep); |
| 148 | static void oz_hcd_endpoint_reset(struct usb_hcd *hcd, |
| 149 | struct usb_host_endpoint *ep); |
| 150 | static int oz_hcd_get_frame_number(struct usb_hcd *hcd); |
| 151 | static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf); |
| 152 | static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue, |
| 153 | u16 windex, char *buf, u16 wlength); |
| 154 | static int oz_hcd_bus_suspend(struct usb_hcd *hcd); |
| 155 | static int oz_hcd_bus_resume(struct usb_hcd *hcd); |
| 156 | static int oz_plat_probe(struct platform_device *dev); |
| 157 | static int oz_plat_remove(struct platform_device *dev); |
| 158 | static void oz_plat_shutdown(struct platform_device *dev); |
| 159 | static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg); |
| 160 | static int oz_plat_resume(struct platform_device *dev); |
| 161 | static void oz_urb_process_tasklet(unsigned long unused); |
| 162 | static int oz_build_endpoints_for_config(struct usb_hcd *hcd, |
| 163 | struct oz_port *port, struct usb_host_config *config, |
| 164 | gfp_t mem_flags); |
| 165 | static void oz_clean_endpoints_for_config(struct usb_hcd *hcd, |
| 166 | struct oz_port *port); |
| 167 | static int oz_build_endpoints_for_interface(struct usb_hcd *hcd, |
| 168 | struct oz_port *port, |
| 169 | struct usb_host_interface *intf, gfp_t mem_flags); |
| 170 | static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd, |
| 171 | struct oz_port *port, int if_ix); |
| 172 | static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb, |
| 173 | gfp_t mem_flags); |
| 174 | static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep, |
| 175 | struct urb *urb); |
| 176 | static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status); |
| 177 | /*------------------------------------------------------------------------------ |
| 178 | * Static external variables. |
| 179 | */ |
| 180 | static struct platform_device *g_plat_dev; |
| 181 | static struct oz_hcd *g_ozhcd; |
| 182 | static DEFINE_SPINLOCK(g_hcdlock); /* Guards g_ozhcd. */ |
| 183 | static const char g_hcd_name[] = "Ozmo WPAN"; |
| 184 | static struct list_head *g_link_pool; |
| 185 | static int g_link_pool_size; |
| 186 | static DEFINE_SPINLOCK(g_link_lock); |
| 187 | static DEFINE_SPINLOCK(g_tasklet_lock); |
| 188 | static struct tasklet_struct g_urb_process_tasklet; |
| 189 | static struct tasklet_struct g_urb_cancel_tasklet; |
| 190 | static atomic_t g_pending_urbs = ATOMIC_INIT(0); |
| 191 | static const struct hc_driver g_oz_hc_drv = { |
| 192 | .description = g_hcd_name, |
| 193 | .product_desc = "Ozmo Devices WPAN", |
| 194 | .hcd_priv_size = sizeof(struct oz_hcd), |
| 195 | .flags = HCD_USB11, |
| 196 | .start = oz_hcd_start, |
| 197 | .stop = oz_hcd_stop, |
| 198 | .shutdown = oz_hcd_shutdown, |
| 199 | .urb_enqueue = oz_hcd_urb_enqueue, |
| 200 | .urb_dequeue = oz_hcd_urb_dequeue, |
| 201 | .endpoint_disable = oz_hcd_endpoint_disable, |
| 202 | .endpoint_reset = oz_hcd_endpoint_reset, |
| 203 | .get_frame_number = oz_hcd_get_frame_number, |
| 204 | .hub_status_data = oz_hcd_hub_status_data, |
| 205 | .hub_control = oz_hcd_hub_control, |
| 206 | .bus_suspend = oz_hcd_bus_suspend, |
| 207 | .bus_resume = oz_hcd_bus_resume, |
| 208 | }; |
| 209 | |
| 210 | static struct platform_driver g_oz_plat_drv = { |
| 211 | .probe = oz_plat_probe, |
| 212 | .remove = oz_plat_remove, |
| 213 | .shutdown = oz_plat_shutdown, |
| 214 | .suspend = oz_plat_suspend, |
| 215 | .resume = oz_plat_resume, |
| 216 | .driver = { |
| 217 | .name = OZ_PLAT_DEV_NAME, |
| 218 | .owner = THIS_MODULE, |
| 219 | }, |
| 220 | }; |
| 221 | /*------------------------------------------------------------------------------ |
| 222 | * Gets our private context area (which is of type struct oz_hcd) from the |
| 223 | * usb_hcd structure. |
| 224 | * Context: any |
| 225 | */ |
| 226 | static inline struct oz_hcd *oz_hcd_private(struct usb_hcd *hcd) |
| 227 | { |
| 228 | return (struct oz_hcd *)hcd->hcd_priv; |
| 229 | } |
| 230 | /*------------------------------------------------------------------------------ |
| 231 | * Searches list of ports to find the index of the one with a specified USB |
| 232 | * bus address. If none of the ports has the bus address then the connection |
| 233 | * port is returned, if there is one or -1 otherwise. |
| 234 | * Context: any |
| 235 | */ |
| 236 | static int oz_get_port_from_addr(struct oz_hcd *ozhcd, u8 bus_addr) |
| 237 | { |
| 238 | int i; |
| 239 | for (i = 0; i < OZ_NB_PORTS; i++) { |
| 240 | if (ozhcd->ports[i].bus_addr == bus_addr) |
| 241 | return i; |
| 242 | } |
| 243 | return ozhcd->conn_port; |
| 244 | } |
| 245 | /*------------------------------------------------------------------------------ |
| 246 | * Allocates an urb link, first trying the pool but going to heap if empty. |
| 247 | * Context: any |
| 248 | */ |
| 249 | static struct oz_urb_link *oz_alloc_urb_link(void) |
| 250 | { |
| 251 | struct oz_urb_link *urbl = 0; |
| 252 | unsigned long irq_state; |
| 253 | spin_lock_irqsave(&g_link_lock, irq_state); |
| 254 | if (g_link_pool) { |
| 255 | urbl = container_of(g_link_pool, struct oz_urb_link, link); |
| 256 | g_link_pool = urbl->link.next; |
| 257 | --g_link_pool_size; |
| 258 | } |
| 259 | spin_unlock_irqrestore(&g_link_lock, irq_state); |
| 260 | if (urbl == 0) |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 261 | urbl = kmalloc(sizeof(struct oz_urb_link), GFP_ATOMIC); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 262 | return urbl; |
| 263 | } |
| 264 | /*------------------------------------------------------------------------------ |
| 265 | * Frees an urb link by putting it in the pool if there is enough space or |
| 266 | * deallocating it to heap otherwise. |
| 267 | * Context: any |
| 268 | */ |
| 269 | static void oz_free_urb_link(struct oz_urb_link *urbl) |
| 270 | { |
| 271 | if (urbl) { |
| 272 | unsigned long irq_state; |
| 273 | spin_lock_irqsave(&g_link_lock, irq_state); |
| 274 | if (g_link_pool_size < OZ_MAX_LINK_POOL_SIZE) { |
| 275 | urbl->link.next = g_link_pool; |
| 276 | g_link_pool = &urbl->link; |
| 277 | urbl = 0; |
| 278 | g_link_pool_size++; |
| 279 | } |
| 280 | spin_unlock_irqrestore(&g_link_lock, irq_state); |
Sachin Kamat | 7010157 | 2012-11-20 17:10:10 +0530 | [diff] [blame] | 281 | kfree(urbl); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 282 | } |
| 283 | } |
| 284 | /*------------------------------------------------------------------------------ |
| 285 | * Deallocates all the urb links in the pool. |
| 286 | * Context: unknown |
| 287 | */ |
| 288 | static void oz_empty_link_pool(void) |
| 289 | { |
| 290 | struct list_head *e; |
| 291 | unsigned long irq_state; |
| 292 | spin_lock_irqsave(&g_link_lock, irq_state); |
| 293 | e = g_link_pool; |
| 294 | g_link_pool = 0; |
| 295 | g_link_pool_size = 0; |
| 296 | spin_unlock_irqrestore(&g_link_lock, irq_state); |
| 297 | while (e) { |
| 298 | struct oz_urb_link *urbl = |
| 299 | container_of(e, struct oz_urb_link, link); |
| 300 | e = e->next; |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 301 | kfree(urbl); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 302 | } |
| 303 | } |
| 304 | /*------------------------------------------------------------------------------ |
| 305 | * Allocates endpoint structure and optionally a buffer. If a buffer is |
| 306 | * allocated it immediately follows the endpoint structure. |
| 307 | * Context: softirq |
| 308 | */ |
| 309 | static struct oz_endpoint *oz_ep_alloc(gfp_t mem_flags, int buffer_size) |
| 310 | { |
| 311 | struct oz_endpoint *ep = |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 312 | kzalloc(sizeof(struct oz_endpoint)+buffer_size, mem_flags); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 313 | if (ep) { |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 314 | INIT_LIST_HEAD(&ep->urb_list); |
| 315 | INIT_LIST_HEAD(&ep->link); |
| 316 | ep->credit = -1; |
| 317 | if (buffer_size) { |
| 318 | ep->buffer_size = buffer_size; |
| 319 | ep->buffer = (u8 *)(ep+1); |
| 320 | } |
| 321 | } |
| 322 | return ep; |
| 323 | } |
| 324 | /*------------------------------------------------------------------------------ |
| 325 | * Pre-condition: Must be called with g_tasklet_lock held and interrupts |
| 326 | * disabled. |
| 327 | * Context: softirq or process |
| 328 | */ |
| 329 | struct oz_urb_link *oz_uncancel_urb(struct oz_hcd *ozhcd, struct urb *urb) |
| 330 | { |
| 331 | struct oz_urb_link *urbl; |
| 332 | struct list_head *e; |
| 333 | list_for_each(e, &ozhcd->urb_cancel_list) { |
| 334 | urbl = container_of(e, struct oz_urb_link, link); |
| 335 | if (urb == urbl->urb) { |
| 336 | list_del_init(e); |
| 337 | return urbl; |
| 338 | } |
| 339 | } |
| 340 | return 0; |
| 341 | } |
| 342 | /*------------------------------------------------------------------------------ |
| 343 | * This is called when we have finished processing an urb. It unlinks it from |
| 344 | * the ep and returns it to the core. |
| 345 | * Context: softirq or process |
| 346 | */ |
| 347 | static void oz_complete_urb(struct usb_hcd *hcd, struct urb *urb, |
| 348 | int status, unsigned long submit_jiffies) |
| 349 | { |
| 350 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 351 | unsigned long irq_state; |
| 352 | struct oz_urb_link *cancel_urbl = 0; |
| 353 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 354 | usb_hcd_unlink_urb_from_ep(hcd, urb); |
| 355 | /* Clear hcpriv which will prevent it being put in the cancel list |
| 356 | * in the event that an attempt is made to cancel it. |
| 357 | */ |
| 358 | urb->hcpriv = 0; |
| 359 | /* Walk the cancel list in case the urb is already sitting there. |
| 360 | * Since we process the cancel list in a tasklet rather than in |
| 361 | * the dequeue function this could happen. |
| 362 | */ |
| 363 | cancel_urbl = oz_uncancel_urb(ozhcd, urb); |
| 364 | /* Note: we release lock but do not enable local irqs. |
| 365 | * It appears that usb_hcd_giveback_urb() expects irqs to be disabled, |
| 366 | * or at least other host controllers disable interrupts at this point |
| 367 | * so we do the same. We must, however, release the lock otherwise a |
| 368 | * deadlock will occur if an urb is submitted to our driver in the urb |
| 369 | * completion function. Because we disable interrupts it is possible |
| 370 | * that the urb_enqueue function can be called with them disabled. |
| 371 | */ |
| 372 | spin_unlock(&g_tasklet_lock); |
| 373 | if (oz_forget_urb(urb)) { |
| 374 | oz_trace("OZWPAN: ERROR Unknown URB %p\n", urb); |
| 375 | } else { |
| 376 | static unsigned long last_time; |
| 377 | atomic_dec(&g_pending_urbs); |
| 378 | oz_trace2(OZ_TRACE_URB, |
| 379 | "%lu: giveback_urb(%p,%x) %lu %lu pending:%d\n", |
| 380 | jiffies, urb, status, jiffies-submit_jiffies, |
| 381 | jiffies-last_time, atomic_read(&g_pending_urbs)); |
| 382 | last_time = jiffies; |
| 383 | oz_event_log(OZ_EVT_URB_DONE, 0, 0, urb, status); |
| 384 | usb_hcd_giveback_urb(hcd, urb, status); |
| 385 | } |
| 386 | spin_lock(&g_tasklet_lock); |
| 387 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 388 | if (cancel_urbl) |
| 389 | oz_free_urb_link(cancel_urbl); |
| 390 | } |
| 391 | /*------------------------------------------------------------------------------ |
| 392 | * Deallocates an endpoint including deallocating any associated stream and |
| 393 | * returning any queued urbs to the core. |
| 394 | * Context: softirq |
| 395 | */ |
| 396 | static void oz_ep_free(struct oz_port *port, struct oz_endpoint *ep) |
| 397 | { |
| 398 | oz_trace("oz_ep_free()\n"); |
| 399 | if (port) { |
| 400 | struct list_head list; |
| 401 | struct oz_hcd *ozhcd = port->ozhcd; |
| 402 | INIT_LIST_HEAD(&list); |
| 403 | if (ep->flags & OZ_F_EP_HAVE_STREAM) |
| 404 | oz_usb_stream_delete(port->hpd, ep->ep_num); |
| 405 | /* Transfer URBs to the orphanage while we hold the lock. */ |
| 406 | spin_lock_bh(&ozhcd->hcd_lock); |
| 407 | /* Note: this works even if ep->urb_list is empty.*/ |
| 408 | list_replace_init(&ep->urb_list, &list); |
| 409 | /* Put the URBs in the orphanage. */ |
| 410 | list_splice_tail(&list, &ozhcd->orphanage); |
| 411 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 412 | } |
| 413 | oz_trace("Freeing endpoint memory\n"); |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 414 | kfree(ep); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 415 | } |
| 416 | /*------------------------------------------------------------------------------ |
| 417 | * Context: softirq |
| 418 | */ |
Rupesh Gujare | 28a7229 | 2012-07-23 18:49:43 +0100 | [diff] [blame] | 419 | void oz_complete_buffered_urb(struct oz_port *port, struct oz_endpoint *ep, |
| 420 | struct urb *urb) |
| 421 | { |
| 422 | u8 data_len, available_space, copy_len; |
| 423 | |
| 424 | memcpy(&data_len, &ep->buffer[ep->out_ix], sizeof(u8)); |
| 425 | if (data_len <= urb->transfer_buffer_length) |
| 426 | available_space = data_len; |
| 427 | else |
| 428 | available_space = urb->transfer_buffer_length; |
| 429 | |
| 430 | if (++ep->out_ix == ep->buffer_size) |
| 431 | ep->out_ix = 0; |
| 432 | copy_len = ep->buffer_size - ep->out_ix; |
| 433 | if (copy_len >= available_space) |
| 434 | copy_len = available_space; |
| 435 | memcpy(urb->transfer_buffer, &ep->buffer[ep->out_ix], copy_len); |
| 436 | |
| 437 | if (copy_len < available_space) { |
| 438 | memcpy((urb->transfer_buffer + copy_len), ep->buffer, |
| 439 | (available_space - copy_len)); |
| 440 | ep->out_ix = available_space - copy_len; |
| 441 | } else { |
| 442 | ep->out_ix += copy_len; |
| 443 | } |
| 444 | urb->actual_length = available_space; |
| 445 | if (ep->out_ix == ep->buffer_size) |
| 446 | ep->out_ix = 0; |
| 447 | |
| 448 | ep->buffered_units--; |
| 449 | oz_trace("Trying to give back buffered frame of size=%d\n", |
| 450 | available_space); |
| 451 | oz_complete_urb(port->ozhcd->hcd, urb, 0, 0); |
| 452 | } |
| 453 | |
| 454 | /*------------------------------------------------------------------------------ |
| 455 | * Context: softirq |
| 456 | */ |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 457 | static int oz_enqueue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir, |
| 458 | struct urb *urb, u8 req_id) |
| 459 | { |
| 460 | struct oz_urb_link *urbl; |
| 461 | struct oz_endpoint *ep; |
| 462 | int err = 0; |
| 463 | if (ep_addr >= OZ_NB_ENDPOINTS) { |
| 464 | oz_trace("Invalid endpoint number in oz_enqueue_ep_urb().\n"); |
| 465 | return -EINVAL; |
| 466 | } |
| 467 | urbl = oz_alloc_urb_link(); |
| 468 | if (!urbl) |
| 469 | return -ENOMEM; |
| 470 | urbl->submit_jiffies = jiffies; |
| 471 | urbl->urb = urb; |
| 472 | urbl->req_id = req_id; |
| 473 | urbl->ep_num = ep_addr; |
| 474 | /* Hold lock while we insert the URB into the list within the |
| 475 | * endpoint structure. |
| 476 | */ |
| 477 | spin_lock_bh(&port->ozhcd->hcd_lock); |
| 478 | /* If the urb has been unlinked while out of any list then |
| 479 | * complete it now. |
| 480 | */ |
| 481 | if (urb->unlinked) { |
| 482 | spin_unlock_bh(&port->ozhcd->hcd_lock); |
| 483 | oz_trace("urb %p unlinked so complete immediately\n", urb); |
| 484 | oz_complete_urb(port->ozhcd->hcd, urb, 0, 0); |
| 485 | oz_free_urb_link(urbl); |
| 486 | return 0; |
| 487 | } |
| 488 | if (in_dir) |
| 489 | ep = port->in_ep[ep_addr]; |
| 490 | else |
| 491 | ep = port->out_ep[ep_addr]; |
Rupesh Gujare | 28a7229 | 2012-07-23 18:49:43 +0100 | [diff] [blame] | 492 | |
| 493 | /*For interrupt endpoint check for buffered data |
| 494 | * & complete urb |
| 495 | */ |
| 496 | if (((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) |
| 497 | && ep->buffered_units > 0) { |
| 498 | oz_free_urb_link(urbl); |
| 499 | spin_unlock_bh(&port->ozhcd->hcd_lock); |
| 500 | oz_complete_buffered_urb(port, ep, urb); |
| 501 | return 0; |
| 502 | } |
| 503 | |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 504 | if (ep && port->hpd) { |
| 505 | list_add_tail(&urbl->link, &ep->urb_list); |
| 506 | if (!in_dir && ep_addr && (ep->credit < 0)) { |
| 507 | ep->last_jiffies = jiffies; |
| 508 | ep->credit = 0; |
| 509 | oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, |
| 510 | 0, 0, ep->credit); |
| 511 | } |
| 512 | } else { |
| 513 | err = -EPIPE; |
| 514 | } |
| 515 | spin_unlock_bh(&port->ozhcd->hcd_lock); |
| 516 | if (err) |
| 517 | oz_free_urb_link(urbl); |
| 518 | return err; |
| 519 | } |
| 520 | /*------------------------------------------------------------------------------ |
| 521 | * Removes an urb from the queue in the endpoint. |
| 522 | * Returns 0 if it is found and -EIDRM otherwise. |
| 523 | * Context: softirq |
| 524 | */ |
| 525 | static int oz_dequeue_ep_urb(struct oz_port *port, u8 ep_addr, int in_dir, |
| 526 | struct urb *urb) |
| 527 | { |
| 528 | struct oz_urb_link *urbl = 0; |
| 529 | struct oz_endpoint *ep; |
| 530 | spin_lock_bh(&port->ozhcd->hcd_lock); |
| 531 | if (in_dir) |
| 532 | ep = port->in_ep[ep_addr]; |
| 533 | else |
| 534 | ep = port->out_ep[ep_addr]; |
| 535 | if (ep) { |
| 536 | struct list_head *e; |
| 537 | list_for_each(e, &ep->urb_list) { |
| 538 | urbl = container_of(e, struct oz_urb_link, link); |
| 539 | if (urbl->urb == urb) { |
| 540 | list_del_init(e); |
| 541 | break; |
| 542 | } |
| 543 | urbl = 0; |
| 544 | } |
| 545 | } |
| 546 | spin_unlock_bh(&port->ozhcd->hcd_lock); |
| 547 | if (urbl) |
| 548 | oz_free_urb_link(urbl); |
| 549 | return urbl ? 0 : -EIDRM; |
| 550 | } |
| 551 | /*------------------------------------------------------------------------------ |
| 552 | * Finds an urb given its request id. |
| 553 | * Context: softirq |
| 554 | */ |
| 555 | static struct urb *oz_find_urb_by_id(struct oz_port *port, int ep_ix, |
| 556 | u8 req_id) |
| 557 | { |
| 558 | struct oz_hcd *ozhcd = port->ozhcd; |
| 559 | struct urb *urb = 0; |
| 560 | struct oz_urb_link *urbl = 0; |
| 561 | struct oz_endpoint *ep; |
| 562 | |
| 563 | spin_lock_bh(&ozhcd->hcd_lock); |
| 564 | ep = port->out_ep[ep_ix]; |
| 565 | if (ep) { |
| 566 | struct list_head *e; |
| 567 | list_for_each(e, &ep->urb_list) { |
| 568 | urbl = container_of(e, struct oz_urb_link, link); |
| 569 | if (urbl->req_id == req_id) { |
| 570 | urb = urbl->urb; |
| 571 | list_del_init(e); |
| 572 | break; |
| 573 | } |
| 574 | } |
| 575 | } |
| 576 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 577 | /* If urb is non-zero then we we must have an urb link to delete. |
| 578 | */ |
| 579 | if (urb) |
| 580 | oz_free_urb_link(urbl); |
| 581 | return urb; |
| 582 | } |
| 583 | /*------------------------------------------------------------------------------ |
| 584 | * Pre-condition: Port lock must be held. |
| 585 | * Context: softirq |
| 586 | */ |
| 587 | static void oz_acquire_port(struct oz_port *port, void *hpd) |
| 588 | { |
| 589 | INIT_LIST_HEAD(&port->isoc_out_ep); |
| 590 | INIT_LIST_HEAD(&port->isoc_in_ep); |
| 591 | port->flags |= OZ_PORT_F_PRESENT | OZ_PORT_F_CHANGED; |
| 592 | port->status |= USB_PORT_STAT_CONNECTION | |
| 593 | (USB_PORT_STAT_C_CONNECTION << 16); |
| 594 | oz_usb_get(hpd); |
| 595 | port->hpd = hpd; |
| 596 | } |
| 597 | /*------------------------------------------------------------------------------ |
| 598 | * Context: softirq |
| 599 | */ |
| 600 | static struct oz_hcd *oz_hcd_claim(void) |
| 601 | { |
| 602 | struct oz_hcd *ozhcd; |
| 603 | spin_lock_bh(&g_hcdlock); |
| 604 | ozhcd = g_ozhcd; |
| 605 | if (ozhcd) |
| 606 | usb_get_hcd(ozhcd->hcd); |
| 607 | spin_unlock_bh(&g_hcdlock); |
| 608 | return ozhcd; |
| 609 | } |
| 610 | /*------------------------------------------------------------------------------ |
| 611 | * Context: softirq |
| 612 | */ |
| 613 | static inline void oz_hcd_put(struct oz_hcd *ozhcd) |
| 614 | { |
| 615 | if (ozhcd) |
| 616 | usb_put_hcd(ozhcd->hcd); |
| 617 | } |
| 618 | /*------------------------------------------------------------------------------ |
| 619 | * This is called by the protocol handler to notify that a PD has arrived. |
| 620 | * We allocate a port to associate with the PD and create a structure for |
| 621 | * endpoint 0. This port is made the connection port. |
| 622 | * In the event that one of the other port is already a connection port then |
| 623 | * we fail. |
| 624 | * TODO We should be able to do better than fail and should be able remember |
| 625 | * that this port needs configuring and make it the connection port once the |
| 626 | * current connection port has been assigned an address. Collisions here are |
| 627 | * probably very rare indeed. |
| 628 | * Context: softirq |
| 629 | */ |
| 630 | void *oz_hcd_pd_arrived(void *hpd) |
| 631 | { |
| 632 | int i; |
| 633 | void *hport = 0; |
| 634 | struct oz_hcd *ozhcd = 0; |
| 635 | struct oz_endpoint *ep; |
| 636 | oz_trace("oz_hcd_pd_arrived()\n"); |
| 637 | ozhcd = oz_hcd_claim(); |
| 638 | if (ozhcd == 0) |
| 639 | return 0; |
| 640 | /* Allocate an endpoint object in advance (before holding hcd lock) to |
| 641 | * use for out endpoint 0. |
| 642 | */ |
| 643 | ep = oz_ep_alloc(GFP_ATOMIC, 0); |
| 644 | spin_lock_bh(&ozhcd->hcd_lock); |
| 645 | if (ozhcd->conn_port >= 0) { |
| 646 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 647 | oz_trace("conn_port >= 0\n"); |
| 648 | goto out; |
| 649 | } |
| 650 | for (i = 0; i < OZ_NB_PORTS; i++) { |
| 651 | struct oz_port *port = &ozhcd->ports[i]; |
| 652 | spin_lock(&port->port_lock); |
| 653 | if ((port->flags & OZ_PORT_F_PRESENT) == 0) { |
| 654 | oz_acquire_port(port, hpd); |
| 655 | spin_unlock(&port->port_lock); |
| 656 | break; |
| 657 | } |
| 658 | spin_unlock(&port->port_lock); |
| 659 | } |
| 660 | if (i < OZ_NB_PORTS) { |
| 661 | oz_trace("Setting conn_port = %d\n", i); |
| 662 | ozhcd->conn_port = i; |
| 663 | /* Attach out endpoint 0. |
| 664 | */ |
| 665 | ozhcd->ports[i].out_ep[0] = ep; |
| 666 | ep = 0; |
| 667 | hport = &ozhcd->ports[i]; |
| 668 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 669 | if (ozhcd->flags & OZ_HDC_F_SUSPENDED) { |
| 670 | oz_trace("Resuming root hub\n"); |
| 671 | usb_hcd_resume_root_hub(ozhcd->hcd); |
| 672 | } |
| 673 | usb_hcd_poll_rh_status(ozhcd->hcd); |
| 674 | } else { |
| 675 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 676 | } |
| 677 | out: |
| 678 | if (ep) /* ep is non-null if not used. */ |
| 679 | oz_ep_free(0, ep); |
| 680 | oz_hcd_put(ozhcd); |
| 681 | return hport; |
| 682 | } |
| 683 | /*------------------------------------------------------------------------------ |
| 684 | * This is called by the protocol handler to notify that the PD has gone away. |
| 685 | * We need to deallocate all resources and then request that the root hub is |
| 686 | * polled. We release the reference we hold on the PD. |
| 687 | * Context: softirq |
| 688 | */ |
| 689 | void oz_hcd_pd_departed(void *hport) |
| 690 | { |
| 691 | struct oz_port *port = (struct oz_port *)hport; |
| 692 | struct oz_hcd *ozhcd; |
| 693 | void *hpd; |
| 694 | struct oz_endpoint *ep = 0; |
| 695 | |
| 696 | oz_trace("oz_hcd_pd_departed()\n"); |
| 697 | if (port == 0) { |
| 698 | oz_trace("oz_hcd_pd_departed() port = 0\n"); |
| 699 | return; |
| 700 | } |
| 701 | ozhcd = port->ozhcd; |
| 702 | if (ozhcd == 0) |
| 703 | return; |
| 704 | /* Check if this is the connection port - if so clear it. |
| 705 | */ |
| 706 | spin_lock_bh(&ozhcd->hcd_lock); |
| 707 | if ((ozhcd->conn_port >= 0) && |
| 708 | (port == &ozhcd->ports[ozhcd->conn_port])) { |
| 709 | oz_trace("Clearing conn_port\n"); |
| 710 | ozhcd->conn_port = -1; |
| 711 | } |
| 712 | spin_lock(&port->port_lock); |
| 713 | port->flags |= OZ_PORT_F_DYING; |
| 714 | spin_unlock(&port->port_lock); |
| 715 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 716 | |
| 717 | oz_clean_endpoints_for_config(ozhcd->hcd, port); |
| 718 | spin_lock_bh(&port->port_lock); |
| 719 | hpd = port->hpd; |
| 720 | port->hpd = 0; |
| 721 | port->bus_addr = 0xff; |
| 722 | port->flags &= ~(OZ_PORT_F_PRESENT | OZ_PORT_F_DYING); |
| 723 | port->flags |= OZ_PORT_F_CHANGED; |
| 724 | port->status &= ~USB_PORT_STAT_CONNECTION; |
| 725 | port->status |= (USB_PORT_STAT_C_CONNECTION << 16); |
| 726 | /* If there is an endpont 0 then clear the pointer while we hold |
| 727 | * the spinlock be we deallocate it after releasing the lock. |
| 728 | */ |
| 729 | if (port->out_ep[0]) { |
| 730 | ep = port->out_ep[0]; |
| 731 | port->out_ep[0] = 0; |
| 732 | } |
| 733 | spin_unlock_bh(&port->port_lock); |
| 734 | if (ep) |
| 735 | oz_ep_free(port, ep); |
| 736 | usb_hcd_poll_rh_status(ozhcd->hcd); |
| 737 | oz_usb_put(hpd); |
| 738 | } |
| 739 | /*------------------------------------------------------------------------------ |
| 740 | * Context: softirq |
| 741 | */ |
| 742 | void oz_hcd_pd_reset(void *hpd, void *hport) |
| 743 | { |
| 744 | /* Cleanup the current configuration and report reset to the core. |
| 745 | */ |
| 746 | struct oz_port *port = (struct oz_port *)hport; |
| 747 | struct oz_hcd *ozhcd = port->ozhcd; |
| 748 | oz_trace("PD Reset\n"); |
| 749 | spin_lock_bh(&port->port_lock); |
| 750 | port->flags |= OZ_PORT_F_CHANGED; |
| 751 | port->status |= USB_PORT_STAT_RESET; |
| 752 | port->status |= (USB_PORT_STAT_C_RESET << 16); |
| 753 | spin_unlock_bh(&port->port_lock); |
| 754 | oz_clean_endpoints_for_config(ozhcd->hcd, port); |
| 755 | usb_hcd_poll_rh_status(ozhcd->hcd); |
| 756 | } |
| 757 | /*------------------------------------------------------------------------------ |
| 758 | * Context: softirq |
| 759 | */ |
| 760 | void oz_hcd_get_desc_cnf(void *hport, u8 req_id, int status, u8 *desc, |
| 761 | int length, int offset, int total_size) |
| 762 | { |
| 763 | struct oz_port *port = (struct oz_port *)hport; |
| 764 | struct urb *urb; |
| 765 | int err = 0; |
| 766 | |
| 767 | oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, status); |
| 768 | oz_trace("oz_hcd_get_desc_cnf length = %d offs = %d tot_size = %d\n", |
| 769 | length, offset, total_size); |
| 770 | urb = oz_find_urb_by_id(port, 0, req_id); |
| 771 | if (!urb) |
| 772 | return; |
| 773 | if (status == 0) { |
| 774 | int copy_len; |
| 775 | int required_size = urb->transfer_buffer_length; |
| 776 | if (required_size > total_size) |
| 777 | required_size = total_size; |
| 778 | copy_len = required_size-offset; |
| 779 | if (length <= copy_len) |
| 780 | copy_len = length; |
| 781 | memcpy(urb->transfer_buffer+offset, desc, copy_len); |
| 782 | offset += copy_len; |
| 783 | if (offset < required_size) { |
| 784 | struct usb_ctrlrequest *setup = |
| 785 | (struct usb_ctrlrequest *)urb->setup_packet; |
| 786 | unsigned wvalue = le16_to_cpu(setup->wValue); |
| 787 | if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id)) |
| 788 | err = -ENOMEM; |
| 789 | else if (oz_usb_get_desc_req(port->hpd, req_id, |
| 790 | setup->bRequestType, (u8)(wvalue>>8), |
| 791 | (u8)wvalue, setup->wIndex, offset, |
| 792 | required_size-offset)) { |
| 793 | oz_dequeue_ep_urb(port, 0, 0, urb); |
| 794 | err = -ENOMEM; |
| 795 | } |
| 796 | if (err == 0) |
| 797 | return; |
| 798 | } |
| 799 | } |
| 800 | urb->actual_length = total_size; |
| 801 | oz_complete_urb(port->ozhcd->hcd, urb, 0, 0); |
| 802 | } |
| 803 | /*------------------------------------------------------------------------------ |
| 804 | * Context: softirq |
| 805 | */ |
| 806 | #ifdef WANT_TRACE |
| 807 | static void oz_display_conf_type(u8 t) |
| 808 | { |
| 809 | switch (t) { |
| 810 | case USB_REQ_GET_STATUS: |
| 811 | oz_trace("USB_REQ_GET_STATUS - cnf\n"); |
| 812 | break; |
| 813 | case USB_REQ_CLEAR_FEATURE: |
| 814 | oz_trace("USB_REQ_CLEAR_FEATURE - cnf\n"); |
| 815 | break; |
| 816 | case USB_REQ_SET_FEATURE: |
| 817 | oz_trace("USB_REQ_SET_FEATURE - cnf\n"); |
| 818 | break; |
| 819 | case USB_REQ_SET_ADDRESS: |
| 820 | oz_trace("USB_REQ_SET_ADDRESS - cnf\n"); |
| 821 | break; |
| 822 | case USB_REQ_GET_DESCRIPTOR: |
| 823 | oz_trace("USB_REQ_GET_DESCRIPTOR - cnf\n"); |
| 824 | break; |
| 825 | case USB_REQ_SET_DESCRIPTOR: |
| 826 | oz_trace("USB_REQ_SET_DESCRIPTOR - cnf\n"); |
| 827 | break; |
| 828 | case USB_REQ_GET_CONFIGURATION: |
| 829 | oz_trace("USB_REQ_GET_CONFIGURATION - cnf\n"); |
| 830 | break; |
| 831 | case USB_REQ_SET_CONFIGURATION: |
| 832 | oz_trace("USB_REQ_SET_CONFIGURATION - cnf\n"); |
| 833 | break; |
| 834 | case USB_REQ_GET_INTERFACE: |
| 835 | oz_trace("USB_REQ_GET_INTERFACE - cnf\n"); |
| 836 | break; |
| 837 | case USB_REQ_SET_INTERFACE: |
| 838 | oz_trace("USB_REQ_SET_INTERFACE - cnf\n"); |
| 839 | break; |
| 840 | case USB_REQ_SYNCH_FRAME: |
| 841 | oz_trace("USB_REQ_SYNCH_FRAME - cnf\n"); |
| 842 | break; |
| 843 | } |
| 844 | } |
| 845 | #else |
| 846 | #define oz_display_conf_type(__x) |
| 847 | #endif /* WANT_TRACE */ |
| 848 | /*------------------------------------------------------------------------------ |
| 849 | * Context: softirq |
| 850 | */ |
| 851 | static void oz_hcd_complete_set_config(struct oz_port *port, struct urb *urb, |
| 852 | u8 rcode, u8 config_num) |
| 853 | { |
| 854 | int rc = 0; |
| 855 | struct usb_hcd *hcd = port->ozhcd->hcd; |
| 856 | if (rcode == 0) { |
| 857 | port->config_num = config_num; |
| 858 | oz_clean_endpoints_for_config(hcd, port); |
| 859 | if (oz_build_endpoints_for_config(hcd, port, |
| 860 | &urb->dev->config[port->config_num-1], GFP_ATOMIC)) { |
| 861 | rc = -ENOMEM; |
| 862 | } |
| 863 | } else { |
| 864 | rc = -ENOMEM; |
| 865 | } |
| 866 | oz_complete_urb(hcd, urb, rc, 0); |
| 867 | } |
| 868 | /*------------------------------------------------------------------------------ |
| 869 | * Context: softirq |
| 870 | */ |
| 871 | static void oz_hcd_complete_set_interface(struct oz_port *port, struct urb *urb, |
| 872 | u8 rcode, u8 if_num, u8 alt) |
| 873 | { |
| 874 | struct usb_hcd *hcd = port->ozhcd->hcd; |
| 875 | int rc = 0; |
| 876 | if (rcode == 0) { |
| 877 | struct usb_host_config *config; |
| 878 | struct usb_host_interface *intf; |
| 879 | oz_trace("Set interface %d alt %d\n", if_num, alt); |
| 880 | oz_clean_endpoints_for_interface(hcd, port, if_num); |
| 881 | config = &urb->dev->config[port->config_num-1]; |
| 882 | intf = &config->intf_cache[if_num]->altsetting[alt]; |
| 883 | if (oz_build_endpoints_for_interface(hcd, port, intf, |
| 884 | GFP_ATOMIC)) |
| 885 | rc = -ENOMEM; |
| 886 | else |
| 887 | port->iface[if_num].alt = alt; |
| 888 | } else { |
| 889 | rc = -ENOMEM; |
| 890 | } |
| 891 | oz_complete_urb(hcd, urb, rc, 0); |
| 892 | } |
| 893 | /*------------------------------------------------------------------------------ |
| 894 | * Context: softirq |
| 895 | */ |
| 896 | void oz_hcd_control_cnf(void *hport, u8 req_id, u8 rcode, u8 *data, |
| 897 | int data_len) |
| 898 | { |
| 899 | struct oz_port *port = (struct oz_port *)hport; |
| 900 | struct urb *urb; |
| 901 | struct usb_ctrlrequest *setup; |
| 902 | struct usb_hcd *hcd = port->ozhcd->hcd; |
| 903 | unsigned windex; |
| 904 | unsigned wvalue; |
| 905 | |
| 906 | oz_event_log(OZ_EVT_CTRL_CNF, 0, req_id, 0, rcode); |
| 907 | oz_trace("oz_hcd_control_cnf rcode=%u len=%d\n", rcode, data_len); |
| 908 | urb = oz_find_urb_by_id(port, 0, req_id); |
| 909 | if (!urb) { |
| 910 | oz_trace("URB not found\n"); |
| 911 | return; |
| 912 | } |
| 913 | setup = (struct usb_ctrlrequest *)urb->setup_packet; |
| 914 | windex = le16_to_cpu(setup->wIndex); |
| 915 | wvalue = le16_to_cpu(setup->wValue); |
| 916 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 917 | /* Standard requests */ |
| 918 | oz_display_conf_type(setup->bRequest); |
| 919 | switch (setup->bRequest) { |
| 920 | case USB_REQ_SET_CONFIGURATION: |
| 921 | oz_hcd_complete_set_config(port, urb, rcode, |
| 922 | (u8)wvalue); |
| 923 | break; |
| 924 | case USB_REQ_SET_INTERFACE: |
| 925 | oz_hcd_complete_set_interface(port, urb, rcode, |
| 926 | (u8)windex, (u8)wvalue); |
| 927 | break; |
| 928 | default: |
| 929 | oz_complete_urb(hcd, urb, 0, 0); |
| 930 | } |
| 931 | |
| 932 | } else { |
| 933 | int copy_len; |
| 934 | oz_trace("VENDOR-CLASS - cnf\n"); |
Rupesh Gujare | 5494ebd | 2012-07-23 18:49:45 +0100 | [diff] [blame] | 935 | if (data_len) { |
| 936 | if (data_len <= urb->transfer_buffer_length) |
| 937 | copy_len = data_len; |
| 938 | else |
| 939 | copy_len = urb->transfer_buffer_length; |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 940 | memcpy(urb->transfer_buffer, data, copy_len); |
Rupesh Gujare | 5494ebd | 2012-07-23 18:49:45 +0100 | [diff] [blame] | 941 | urb->actual_length = copy_len; |
| 942 | } |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 943 | oz_complete_urb(hcd, urb, 0, 0); |
| 944 | } |
| 945 | } |
| 946 | /*------------------------------------------------------------------------------ |
| 947 | * Context: softirq-serialized |
| 948 | */ |
| 949 | static int oz_hcd_buffer_data(struct oz_endpoint *ep, u8 *data, int data_len) |
| 950 | { |
| 951 | int space; |
| 952 | int copy_len; |
| 953 | if (!ep->buffer) |
| 954 | return -1; |
| 955 | space = ep->out_ix-ep->in_ix-1; |
| 956 | if (space < 0) |
| 957 | space += ep->buffer_size; |
| 958 | if (space < (data_len+1)) { |
| 959 | oz_trace("Buffer full\n"); |
| 960 | return -1; |
| 961 | } |
| 962 | ep->buffer[ep->in_ix] = (u8)data_len; |
| 963 | if (++ep->in_ix == ep->buffer_size) |
| 964 | ep->in_ix = 0; |
| 965 | copy_len = ep->buffer_size - ep->in_ix; |
| 966 | if (copy_len > data_len) |
| 967 | copy_len = data_len; |
| 968 | memcpy(&ep->buffer[ep->in_ix], data, copy_len); |
| 969 | |
| 970 | if (copy_len < data_len) { |
| 971 | memcpy(ep->buffer, data+copy_len, data_len-copy_len); |
| 972 | ep->in_ix = data_len-copy_len; |
| 973 | } else { |
| 974 | ep->in_ix += copy_len; |
| 975 | } |
| 976 | if (ep->in_ix == ep->buffer_size) |
| 977 | ep->in_ix = 0; |
| 978 | ep->buffered_units++; |
| 979 | return 0; |
| 980 | } |
| 981 | /*------------------------------------------------------------------------------ |
| 982 | * Context: softirq-serialized |
| 983 | */ |
| 984 | void oz_hcd_data_ind(void *hport, u8 endpoint, u8 *data, int data_len) |
| 985 | { |
| 986 | struct oz_port *port = (struct oz_port *)hport; |
| 987 | struct oz_endpoint *ep; |
| 988 | struct oz_hcd *ozhcd = port->ozhcd; |
| 989 | spin_lock_bh(&ozhcd->hcd_lock); |
| 990 | ep = port->in_ep[endpoint & USB_ENDPOINT_NUMBER_MASK]; |
| 991 | if (ep == 0) |
| 992 | goto done; |
| 993 | switch (ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) { |
| 994 | case USB_ENDPOINT_XFER_INT: |
| 995 | case USB_ENDPOINT_XFER_BULK: |
| 996 | if (!list_empty(&ep->urb_list)) { |
| 997 | struct oz_urb_link *urbl = |
| 998 | list_first_entry(&ep->urb_list, |
| 999 | struct oz_urb_link, link); |
| 1000 | struct urb *urb; |
| 1001 | int copy_len; |
| 1002 | list_del_init(&urbl->link); |
| 1003 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1004 | urb = urbl->urb; |
| 1005 | oz_free_urb_link(urbl); |
| 1006 | if (data_len <= urb->transfer_buffer_length) |
| 1007 | copy_len = data_len; |
| 1008 | else |
| 1009 | copy_len = urb->transfer_buffer_length; |
| 1010 | memcpy(urb->transfer_buffer, data, copy_len); |
| 1011 | urb->actual_length = copy_len; |
| 1012 | oz_complete_urb(port->ozhcd->hcd, urb, 0, 0); |
| 1013 | return; |
Rupesh Gujare | 28a7229 | 2012-07-23 18:49:43 +0100 | [diff] [blame] | 1014 | } else { |
| 1015 | oz_trace("buffering frame as URB is not available\n"); |
| 1016 | oz_hcd_buffer_data(ep, data, data_len); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1017 | } |
| 1018 | break; |
| 1019 | case USB_ENDPOINT_XFER_ISOC: |
| 1020 | oz_hcd_buffer_data(ep, data, data_len); |
| 1021 | break; |
| 1022 | } |
| 1023 | done: |
| 1024 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1025 | } |
| 1026 | /*------------------------------------------------------------------------------ |
| 1027 | * Context: unknown |
| 1028 | */ |
| 1029 | static inline int oz_usb_get_frame_number(void) |
| 1030 | { |
| 1031 | return jiffies_to_msecs(get_jiffies_64()); |
| 1032 | } |
| 1033 | /*------------------------------------------------------------------------------ |
| 1034 | * Context: softirq |
| 1035 | */ |
| 1036 | int oz_hcd_heartbeat(void *hport) |
| 1037 | { |
| 1038 | int rc = 0; |
| 1039 | struct oz_port *port = (struct oz_port *)hport; |
| 1040 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1041 | struct oz_urb_link *urbl; |
| 1042 | struct list_head xfr_list; |
| 1043 | struct list_head *e; |
| 1044 | struct list_head *n; |
| 1045 | struct urb *urb; |
| 1046 | struct oz_endpoint *ep; |
| 1047 | unsigned long now = jiffies; |
| 1048 | INIT_LIST_HEAD(&xfr_list); |
| 1049 | /* Check the OUT isoc endpoints to see if any URB data can be sent. |
| 1050 | */ |
| 1051 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1052 | list_for_each(e, &port->isoc_out_ep) { |
| 1053 | ep = ep_from_link(e); |
| 1054 | if (ep->credit < 0) |
| 1055 | continue; |
Rupesh Gujare | 2416891 | 2012-07-23 18:49:44 +0100 | [diff] [blame] | 1056 | ep->credit += jiffies_to_msecs(now - ep->last_jiffies); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1057 | if (ep->credit > ep->credit_ceiling) |
| 1058 | ep->credit = ep->credit_ceiling; |
| 1059 | oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0, ep->credit); |
| 1060 | ep->last_jiffies = now; |
| 1061 | while (ep->credit && !list_empty(&ep->urb_list)) { |
| 1062 | urbl = list_first_entry(&ep->urb_list, |
| 1063 | struct oz_urb_link, link); |
| 1064 | urb = urbl->urb; |
Rupesh Gujare | 2416891 | 2012-07-23 18:49:44 +0100 | [diff] [blame] | 1065 | if ((ep->credit + 1) < urb->number_of_packets) |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1066 | break; |
| 1067 | ep->credit -= urb->number_of_packets; |
| 1068 | oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num, 0, 0, |
| 1069 | ep->credit); |
Wei Yongjun | 094e74c | 2012-09-05 14:48:48 +0800 | [diff] [blame] | 1070 | list_move_tail(&urbl->link, &xfr_list); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1071 | } |
| 1072 | } |
| 1073 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1074 | /* Send to PD and complete URBs. |
| 1075 | */ |
| 1076 | list_for_each_safe(e, n, &xfr_list) { |
| 1077 | unsigned long t; |
| 1078 | urbl = container_of(e, struct oz_urb_link, link); |
| 1079 | urb = urbl->urb; |
| 1080 | t = urbl->submit_jiffies; |
| 1081 | list_del_init(e); |
| 1082 | urb->error_count = 0; |
| 1083 | urb->start_frame = oz_usb_get_frame_number(); |
| 1084 | oz_usb_send_isoc(port->hpd, urbl->ep_num, urb); |
| 1085 | oz_free_urb_link(urbl); |
| 1086 | oz_complete_urb(port->ozhcd->hcd, urb, 0, t); |
| 1087 | } |
| 1088 | /* Check the IN isoc endpoints to see if any URBs can be completed. |
| 1089 | */ |
| 1090 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1091 | list_for_each(e, &port->isoc_in_ep) { |
| 1092 | struct oz_endpoint *ep = ep_from_link(e); |
| 1093 | if (ep->flags & OZ_F_EP_BUFFERING) { |
| 1094 | if (ep->buffered_units * OZ_IN_BUFFERING_UNITS) { |
| 1095 | ep->flags &= ~OZ_F_EP_BUFFERING; |
| 1096 | ep->credit = 0; |
| 1097 | oz_event_log(OZ_EVT_EP_CREDIT, |
| 1098 | ep->ep_num | USB_DIR_IN, |
| 1099 | 0, 0, ep->credit); |
| 1100 | ep->last_jiffies = now; |
| 1101 | ep->start_frame = 0; |
| 1102 | oz_event_log(OZ_EVT_EP_BUFFERING, |
| 1103 | ep->ep_num | USB_DIR_IN, 0, 0, 0); |
| 1104 | } |
| 1105 | continue; |
| 1106 | } |
Rupesh Gujare | 2416891 | 2012-07-23 18:49:44 +0100 | [diff] [blame] | 1107 | ep->credit += jiffies_to_msecs(now - ep->last_jiffies); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1108 | oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN, |
| 1109 | 0, 0, ep->credit); |
| 1110 | ep->last_jiffies = now; |
| 1111 | while (!list_empty(&ep->urb_list)) { |
| 1112 | struct oz_urb_link *urbl = |
| 1113 | list_first_entry(&ep->urb_list, |
| 1114 | struct oz_urb_link, link); |
| 1115 | struct urb *urb = urbl->urb; |
| 1116 | int len = 0; |
| 1117 | int copy_len; |
| 1118 | int i; |
Rupesh Gujare | 2416891 | 2012-07-23 18:49:44 +0100 | [diff] [blame] | 1119 | if ((ep->credit + 1) < urb->number_of_packets) |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1120 | break; |
| 1121 | if (ep->buffered_units < urb->number_of_packets) |
| 1122 | break; |
| 1123 | urb->actual_length = 0; |
| 1124 | for (i = 0; i < urb->number_of_packets; i++) { |
| 1125 | len = ep->buffer[ep->out_ix]; |
| 1126 | if (++ep->out_ix == ep->buffer_size) |
| 1127 | ep->out_ix = 0; |
| 1128 | copy_len = ep->buffer_size - ep->out_ix; |
| 1129 | if (copy_len > len) |
| 1130 | copy_len = len; |
| 1131 | memcpy(urb->transfer_buffer, |
| 1132 | &ep->buffer[ep->out_ix], copy_len); |
| 1133 | if (copy_len < len) { |
| 1134 | memcpy(urb->transfer_buffer+copy_len, |
| 1135 | ep->buffer, len-copy_len); |
| 1136 | ep->out_ix = len-copy_len; |
| 1137 | } else |
| 1138 | ep->out_ix += copy_len; |
| 1139 | if (ep->out_ix == ep->buffer_size) |
| 1140 | ep->out_ix = 0; |
| 1141 | urb->iso_frame_desc[i].offset = |
| 1142 | urb->actual_length; |
| 1143 | urb->actual_length += len; |
| 1144 | urb->iso_frame_desc[i].actual_length = len; |
| 1145 | urb->iso_frame_desc[i].status = 0; |
| 1146 | } |
| 1147 | ep->buffered_units -= urb->number_of_packets; |
| 1148 | urb->error_count = 0; |
| 1149 | urb->start_frame = ep->start_frame; |
| 1150 | ep->start_frame += urb->number_of_packets; |
Wei Yongjun | 094e74c | 2012-09-05 14:48:48 +0800 | [diff] [blame] | 1151 | list_move_tail(&urbl->link, &xfr_list); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1152 | ep->credit -= urb->number_of_packets; |
| 1153 | oz_event_log(OZ_EVT_EP_CREDIT, ep->ep_num | USB_DIR_IN, |
| 1154 | 0, 0, ep->credit); |
| 1155 | } |
| 1156 | } |
| 1157 | if (!list_empty(&port->isoc_out_ep) || !list_empty(&port->isoc_in_ep)) |
| 1158 | rc = 1; |
| 1159 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1160 | /* Complete the filled URBs. |
| 1161 | */ |
| 1162 | list_for_each_safe(e, n, &xfr_list) { |
| 1163 | urbl = container_of(e, struct oz_urb_link, link); |
| 1164 | urb = urbl->urb; |
| 1165 | list_del_init(e); |
| 1166 | oz_free_urb_link(urbl); |
| 1167 | oz_complete_urb(port->ozhcd->hcd, urb, 0, 0); |
| 1168 | } |
| 1169 | /* Check if there are any ep0 requests that have timed out. |
| 1170 | * If so resent to PD. |
| 1171 | */ |
| 1172 | ep = port->out_ep[0]; |
| 1173 | if (ep) { |
| 1174 | struct list_head *e; |
| 1175 | struct list_head *n; |
| 1176 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1177 | list_for_each_safe(e, n, &ep->urb_list) { |
| 1178 | urbl = container_of(e, struct oz_urb_link, link); |
| 1179 | if (time_after(now, urbl->submit_jiffies+HZ/2)) { |
| 1180 | oz_trace("%ld: Request 0x%p timeout\n", |
| 1181 | now, urbl->urb); |
| 1182 | urbl->submit_jiffies = now; |
Wei Yongjun | 094e74c | 2012-09-05 14:48:48 +0800 | [diff] [blame] | 1183 | list_move_tail(e, &xfr_list); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1184 | } |
| 1185 | } |
| 1186 | if (!list_empty(&ep->urb_list)) |
| 1187 | rc = 1; |
| 1188 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1189 | e = xfr_list.next; |
| 1190 | while (e != &xfr_list) { |
| 1191 | urbl = container_of(e, struct oz_urb_link, link); |
| 1192 | e = e->next; |
| 1193 | oz_trace("Resending request to PD.\n"); |
| 1194 | oz_process_ep0_urb(ozhcd, urbl->urb, GFP_ATOMIC); |
| 1195 | oz_free_urb_link(urbl); |
| 1196 | } |
| 1197 | } |
| 1198 | return rc; |
| 1199 | } |
| 1200 | /*------------------------------------------------------------------------------ |
| 1201 | * Context: softirq |
| 1202 | */ |
| 1203 | static int oz_build_endpoints_for_interface(struct usb_hcd *hcd, |
| 1204 | struct oz_port *port, |
| 1205 | struct usb_host_interface *intf, gfp_t mem_flags) |
| 1206 | { |
| 1207 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1208 | int i; |
| 1209 | int if_ix = intf->desc.bInterfaceNumber; |
| 1210 | int request_heartbeat = 0; |
| 1211 | oz_trace("interface[%d] = %p\n", if_ix, intf); |
| 1212 | for (i = 0; i < intf->desc.bNumEndpoints; i++) { |
| 1213 | struct usb_host_endpoint *hep = &intf->endpoint[i]; |
| 1214 | u8 ep_addr = hep->desc.bEndpointAddress; |
| 1215 | u8 ep_num = ep_addr & USB_ENDPOINT_NUMBER_MASK; |
| 1216 | struct oz_endpoint *ep; |
| 1217 | int buffer_size = 0; |
| 1218 | |
| 1219 | oz_trace("%d bEndpointAddress = %x\n", i, ep_addr); |
Rupesh Gujare | 28a7229 | 2012-07-23 18:49:43 +0100 | [diff] [blame] | 1220 | if (ep_addr & USB_ENDPOINT_DIR_MASK) { |
| 1221 | switch (hep->desc.bmAttributes & |
| 1222 | USB_ENDPOINT_XFERTYPE_MASK) { |
| 1223 | case USB_ENDPOINT_XFER_ISOC: |
| 1224 | buffer_size = 24*1024; |
| 1225 | break; |
| 1226 | case USB_ENDPOINT_XFER_INT: |
| 1227 | buffer_size = 128; |
| 1228 | break; |
| 1229 | } |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1230 | } |
| 1231 | |
| 1232 | ep = oz_ep_alloc(mem_flags, buffer_size); |
| 1233 | if (!ep) { |
| 1234 | oz_clean_endpoints_for_interface(hcd, port, if_ix); |
| 1235 | return -ENOMEM; |
| 1236 | } |
| 1237 | ep->attrib = hep->desc.bmAttributes; |
| 1238 | ep->ep_num = ep_num; |
| 1239 | if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) |
| 1240 | == USB_ENDPOINT_XFER_ISOC) { |
| 1241 | oz_trace("wMaxPacketSize = %d\n", |
| 1242 | hep->desc.wMaxPacketSize); |
| 1243 | ep->credit_ceiling = 200; |
| 1244 | if (ep_addr & USB_ENDPOINT_DIR_MASK) { |
| 1245 | ep->flags |= OZ_F_EP_BUFFERING; |
| 1246 | oz_event_log(OZ_EVT_EP_BUFFERING, |
| 1247 | ep->ep_num | USB_DIR_IN, 1, 0, 0); |
| 1248 | } else { |
| 1249 | ep->flags |= OZ_F_EP_HAVE_STREAM; |
| 1250 | if (oz_usb_stream_create(port->hpd, ep_num)) |
| 1251 | ep->flags &= ~OZ_F_EP_HAVE_STREAM; |
| 1252 | } |
| 1253 | } |
| 1254 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1255 | if (ep_addr & USB_ENDPOINT_DIR_MASK) { |
| 1256 | port->in_ep[ep_num] = ep; |
| 1257 | port->iface[if_ix].ep_mask |= |
| 1258 | (1<<(ep_num+OZ_NB_ENDPOINTS)); |
| 1259 | if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) |
| 1260 | == USB_ENDPOINT_XFER_ISOC) { |
| 1261 | list_add_tail(&ep->link, &port->isoc_in_ep); |
| 1262 | request_heartbeat = 1; |
| 1263 | } |
| 1264 | } else { |
| 1265 | port->out_ep[ep_num] = ep; |
| 1266 | port->iface[if_ix].ep_mask |= (1<<ep_num); |
| 1267 | if ((ep->attrib & USB_ENDPOINT_XFERTYPE_MASK) |
| 1268 | == USB_ENDPOINT_XFER_ISOC) { |
| 1269 | list_add_tail(&ep->link, &port->isoc_out_ep); |
| 1270 | request_heartbeat = 1; |
| 1271 | } |
| 1272 | } |
| 1273 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1274 | if (request_heartbeat && port->hpd) |
| 1275 | oz_usb_request_heartbeat(port->hpd); |
| 1276 | } |
| 1277 | return 0; |
| 1278 | } |
| 1279 | /*------------------------------------------------------------------------------ |
| 1280 | * Context: softirq |
| 1281 | */ |
| 1282 | static void oz_clean_endpoints_for_interface(struct usb_hcd *hcd, |
| 1283 | struct oz_port *port, int if_ix) |
| 1284 | { |
| 1285 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1286 | unsigned mask; |
| 1287 | int i; |
| 1288 | struct list_head ep_list; |
| 1289 | |
| 1290 | oz_trace("Deleting endpoints for interface %d\n", if_ix); |
| 1291 | if (if_ix >= port->num_iface) |
| 1292 | return; |
| 1293 | INIT_LIST_HEAD(&ep_list); |
| 1294 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1295 | mask = port->iface[if_ix].ep_mask; |
| 1296 | port->iface[if_ix].ep_mask = 0; |
| 1297 | for (i = 0; i < OZ_NB_ENDPOINTS; i++) { |
| 1298 | struct list_head *e; |
| 1299 | /* Gather OUT endpoints. |
| 1300 | */ |
| 1301 | if ((mask & (1<<i)) && port->out_ep[i]) { |
| 1302 | e = &port->out_ep[i]->link; |
| 1303 | port->out_ep[i] = 0; |
| 1304 | /* Remove from isoc list if present. |
| 1305 | */ |
Wei Yongjun | 094e74c | 2012-09-05 14:48:48 +0800 | [diff] [blame] | 1306 | list_move_tail(e, &ep_list); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1307 | } |
| 1308 | /* Gather IN endpoints. |
| 1309 | */ |
| 1310 | if ((mask & (1<<(i+OZ_NB_ENDPOINTS))) && port->in_ep[i]) { |
| 1311 | e = &port->in_ep[i]->link; |
| 1312 | port->in_ep[i] = 0; |
Wei Yongjun | 094e74c | 2012-09-05 14:48:48 +0800 | [diff] [blame] | 1313 | list_move_tail(e, &ep_list); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1314 | } |
| 1315 | } |
| 1316 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1317 | while (!list_empty(&ep_list)) { |
| 1318 | struct oz_endpoint *ep = |
| 1319 | list_first_entry(&ep_list, struct oz_endpoint, link); |
| 1320 | list_del_init(&ep->link); |
| 1321 | oz_ep_free(port, ep); |
| 1322 | } |
| 1323 | } |
| 1324 | /*------------------------------------------------------------------------------ |
| 1325 | * Context: softirq |
| 1326 | */ |
| 1327 | static int oz_build_endpoints_for_config(struct usb_hcd *hcd, |
| 1328 | struct oz_port *port, struct usb_host_config *config, |
| 1329 | gfp_t mem_flags) |
| 1330 | { |
| 1331 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1332 | int i; |
| 1333 | int num_iface = config->desc.bNumInterfaces; |
| 1334 | if (num_iface) { |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 1335 | struct oz_interface *iface; |
| 1336 | |
| 1337 | iface = kmalloc(num_iface*sizeof(struct oz_interface), |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1338 | mem_flags | __GFP_ZERO); |
| 1339 | if (!iface) |
| 1340 | return -ENOMEM; |
| 1341 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1342 | port->iface = iface; |
| 1343 | port->num_iface = num_iface; |
| 1344 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1345 | } |
| 1346 | for (i = 0; i < num_iface; i++) { |
| 1347 | struct usb_host_interface *intf = |
| 1348 | &config->intf_cache[i]->altsetting[0]; |
| 1349 | if (oz_build_endpoints_for_interface(hcd, port, intf, |
| 1350 | mem_flags)) |
| 1351 | goto fail; |
| 1352 | } |
| 1353 | return 0; |
| 1354 | fail: |
| 1355 | oz_clean_endpoints_for_config(hcd, port); |
| 1356 | return -1; |
| 1357 | } |
| 1358 | /*------------------------------------------------------------------------------ |
| 1359 | * Context: softirq |
| 1360 | */ |
| 1361 | static void oz_clean_endpoints_for_config(struct usb_hcd *hcd, |
| 1362 | struct oz_port *port) |
| 1363 | { |
| 1364 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1365 | int i; |
| 1366 | oz_trace("Deleting endpoints for configuration.\n"); |
| 1367 | for (i = 0; i < port->num_iface; i++) |
| 1368 | oz_clean_endpoints_for_interface(hcd, port, i); |
| 1369 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1370 | if (port->iface) { |
| 1371 | oz_trace("Freeing interfaces object.\n"); |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame] | 1372 | kfree(port->iface); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1373 | port->iface = 0; |
| 1374 | } |
| 1375 | port->num_iface = 0; |
| 1376 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1377 | } |
| 1378 | /*------------------------------------------------------------------------------ |
| 1379 | * Context: tasklet |
| 1380 | */ |
| 1381 | static void *oz_claim_hpd(struct oz_port *port) |
| 1382 | { |
| 1383 | void *hpd = 0; |
| 1384 | struct oz_hcd *ozhcd = port->ozhcd; |
| 1385 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1386 | hpd = port->hpd; |
| 1387 | if (hpd) |
| 1388 | oz_usb_get(hpd); |
| 1389 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1390 | return hpd; |
| 1391 | } |
| 1392 | /*------------------------------------------------------------------------------ |
| 1393 | * Context: tasklet |
| 1394 | */ |
| 1395 | static void oz_process_ep0_urb(struct oz_hcd *ozhcd, struct urb *urb, |
| 1396 | gfp_t mem_flags) |
| 1397 | { |
| 1398 | struct usb_ctrlrequest *setup; |
| 1399 | unsigned windex; |
| 1400 | unsigned wvalue; |
| 1401 | unsigned wlength; |
| 1402 | void *hpd = 0; |
| 1403 | u8 req_id; |
| 1404 | int rc = 0; |
| 1405 | unsigned complete = 0; |
| 1406 | |
| 1407 | int port_ix = -1; |
| 1408 | struct oz_port *port = 0; |
| 1409 | |
| 1410 | oz_trace2(OZ_TRACE_URB, "%lu: oz_process_ep0_urb(%p)\n", jiffies, urb); |
| 1411 | port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum); |
| 1412 | if (port_ix < 0) { |
| 1413 | rc = -EPIPE; |
| 1414 | goto out; |
| 1415 | } |
| 1416 | port = &ozhcd->ports[port_ix]; |
| 1417 | if (((port->flags & OZ_PORT_F_PRESENT) == 0) |
| 1418 | || (port->flags & OZ_PORT_F_DYING)) { |
| 1419 | oz_trace("Refusing URB port_ix = %d devnum = %d\n", |
| 1420 | port_ix, urb->dev->devnum); |
| 1421 | rc = -EPIPE; |
| 1422 | goto out; |
| 1423 | } |
| 1424 | /* Store port in private context data. |
| 1425 | */ |
| 1426 | urb->hcpriv = port; |
| 1427 | setup = (struct usb_ctrlrequest *)urb->setup_packet; |
| 1428 | windex = le16_to_cpu(setup->wIndex); |
| 1429 | wvalue = le16_to_cpu(setup->wValue); |
| 1430 | wlength = le16_to_cpu(setup->wLength); |
| 1431 | oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequestType = %x\n", |
| 1432 | setup->bRequestType); |
| 1433 | oz_trace2(OZ_TRACE_CTRL_DETAIL, "bRequest = %x\n", setup->bRequest); |
| 1434 | oz_trace2(OZ_TRACE_CTRL_DETAIL, "wValue = %x\n", wvalue); |
| 1435 | oz_trace2(OZ_TRACE_CTRL_DETAIL, "wIndex = %x\n", windex); |
| 1436 | oz_trace2(OZ_TRACE_CTRL_DETAIL, "wLength = %x\n", wlength); |
| 1437 | |
| 1438 | req_id = port->next_req_id++; |
| 1439 | hpd = oz_claim_hpd(port); |
| 1440 | if (hpd == 0) { |
| 1441 | oz_trace("Cannot claim port\n"); |
| 1442 | rc = -EPIPE; |
| 1443 | goto out; |
| 1444 | } |
| 1445 | |
| 1446 | if ((setup->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) { |
| 1447 | /* Standard requests |
| 1448 | */ |
| 1449 | switch (setup->bRequest) { |
| 1450 | case USB_REQ_GET_DESCRIPTOR: |
| 1451 | oz_trace("USB_REQ_GET_DESCRIPTOR - req\n"); |
| 1452 | break; |
| 1453 | case USB_REQ_SET_ADDRESS: |
| 1454 | oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, |
| 1455 | 0, 0, setup->bRequestType); |
| 1456 | oz_trace("USB_REQ_SET_ADDRESS - req\n"); |
| 1457 | oz_trace("Port %d address is 0x%x\n", ozhcd->conn_port, |
| 1458 | (u8)le16_to_cpu(setup->wValue)); |
| 1459 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1460 | if (ozhcd->conn_port >= 0) { |
| 1461 | ozhcd->ports[ozhcd->conn_port].bus_addr = |
| 1462 | (u8)le16_to_cpu(setup->wValue); |
| 1463 | oz_trace("Clearing conn_port\n"); |
| 1464 | ozhcd->conn_port = -1; |
| 1465 | } |
| 1466 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1467 | complete = 1; |
| 1468 | break; |
| 1469 | case USB_REQ_SET_CONFIGURATION: |
| 1470 | oz_trace("USB_REQ_SET_CONFIGURATION - req\n"); |
| 1471 | break; |
| 1472 | case USB_REQ_GET_CONFIGURATION: |
Masanari Iida | 8dc2459 | 2012-04-25 23:28:35 +0900 | [diff] [blame] | 1473 | /* We short circuit this case and reply directly since |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1474 | * we have the selected configuration number cached. |
| 1475 | */ |
| 1476 | oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0, |
| 1477 | setup->bRequestType); |
| 1478 | oz_trace("USB_REQ_GET_CONFIGURATION - reply now\n"); |
| 1479 | if (urb->transfer_buffer_length >= 1) { |
| 1480 | urb->actual_length = 1; |
| 1481 | *((u8 *)urb->transfer_buffer) = |
| 1482 | port->config_num; |
| 1483 | complete = 1; |
| 1484 | } else { |
| 1485 | rc = -EPIPE; |
| 1486 | } |
| 1487 | break; |
| 1488 | case USB_REQ_GET_INTERFACE: |
Masanari Iida | 8dc2459 | 2012-04-25 23:28:35 +0900 | [diff] [blame] | 1489 | /* We short circuit this case and reply directly since |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1490 | * we have the selected interface alternative cached. |
| 1491 | */ |
| 1492 | oz_event_log(OZ_EVT_CTRL_LOCAL, setup->bRequest, 0, 0, |
| 1493 | setup->bRequestType); |
| 1494 | oz_trace("USB_REQ_GET_INTERFACE - reply now\n"); |
| 1495 | if (urb->transfer_buffer_length >= 1) { |
| 1496 | urb->actual_length = 1; |
| 1497 | *((u8 *)urb->transfer_buffer) = |
| 1498 | port->iface[(u8)windex].alt; |
| 1499 | oz_trace("interface = %d alt = %d\n", |
| 1500 | windex, port->iface[(u8)windex].alt); |
| 1501 | complete = 1; |
| 1502 | } else { |
| 1503 | rc = -EPIPE; |
| 1504 | } |
| 1505 | break; |
| 1506 | case USB_REQ_SET_INTERFACE: |
| 1507 | oz_trace("USB_REQ_SET_INTERFACE - req\n"); |
| 1508 | break; |
| 1509 | } |
| 1510 | } |
| 1511 | if (!rc && !complete) { |
| 1512 | int data_len = 0; |
| 1513 | if ((setup->bRequestType & USB_DIR_IN) == 0) |
| 1514 | data_len = wlength; |
Rupesh Gujare | 5494ebd | 2012-07-23 18:49:45 +0100 | [diff] [blame] | 1515 | urb->actual_length = data_len; |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1516 | if (oz_usb_control_req(port->hpd, req_id, setup, |
| 1517 | urb->transfer_buffer, data_len)) { |
| 1518 | rc = -ENOMEM; |
| 1519 | } else { |
| 1520 | /* Note: we are queuing the request after we have |
Justin P. Mattock | 595914f | 2012-03-19 08:17:50 -0700 | [diff] [blame] | 1521 | * submitted it to be transmitted. If the request were |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 1522 | * to complete before we queued it then it would not |
| 1523 | * be found in the queue. It seems impossible for |
| 1524 | * this to happen but if it did the request would |
| 1525 | * be resubmitted so the problem would hopefully |
| 1526 | * resolve itself. Putting the request into the |
| 1527 | * queue before it has been sent is worse since the |
| 1528 | * urb could be cancelled while we are using it |
| 1529 | * to build the request. |
| 1530 | */ |
| 1531 | if (oz_enqueue_ep_urb(port, 0, 0, urb, req_id)) |
| 1532 | rc = -ENOMEM; |
| 1533 | } |
| 1534 | } |
| 1535 | oz_usb_put(hpd); |
| 1536 | out: |
| 1537 | if (rc || complete) { |
| 1538 | oz_trace("Completing request locally\n"); |
| 1539 | oz_complete_urb(ozhcd->hcd, urb, rc, 0); |
| 1540 | } else { |
| 1541 | oz_usb_request_heartbeat(port->hpd); |
| 1542 | } |
| 1543 | } |
| 1544 | /*------------------------------------------------------------------------------ |
| 1545 | * Context: tasklet |
| 1546 | */ |
| 1547 | static int oz_urb_process(struct oz_hcd *ozhcd, struct urb *urb) |
| 1548 | { |
| 1549 | int rc = 0; |
| 1550 | struct oz_port *port = urb->hcpriv; |
| 1551 | u8 ep_addr; |
| 1552 | /* When we are paranoid we keep a list of urbs which we check against |
| 1553 | * before handing one back. This is just for debugging during |
| 1554 | * development and should be turned off in the released driver. |
| 1555 | */ |
| 1556 | oz_remember_urb(urb); |
| 1557 | /* Check buffer is valid. |
| 1558 | */ |
| 1559 | if (!urb->transfer_buffer && urb->transfer_buffer_length) |
| 1560 | return -EINVAL; |
| 1561 | /* Check if there is a device at the port - refuse if not. |
| 1562 | */ |
| 1563 | if ((port->flags & OZ_PORT_F_PRESENT) == 0) |
| 1564 | return -EPIPE; |
| 1565 | ep_addr = usb_pipeendpoint(urb->pipe); |
| 1566 | if (ep_addr) { |
| 1567 | /* If the request is not for EP0 then queue it. |
| 1568 | */ |
| 1569 | if (oz_enqueue_ep_urb(port, ep_addr, usb_pipein(urb->pipe), |
| 1570 | urb, 0)) |
| 1571 | rc = -EPIPE; |
| 1572 | } else { |
| 1573 | oz_process_ep0_urb(ozhcd, urb, GFP_ATOMIC); |
| 1574 | } |
| 1575 | return rc; |
| 1576 | } |
| 1577 | /*------------------------------------------------------------------------------ |
| 1578 | * Context: tasklet |
| 1579 | */ |
| 1580 | static void oz_urb_process_tasklet(unsigned long unused) |
| 1581 | { |
| 1582 | unsigned long irq_state; |
| 1583 | struct urb *urb; |
| 1584 | struct oz_hcd *ozhcd = oz_hcd_claim(); |
| 1585 | int rc = 0; |
| 1586 | if (ozhcd == 0) |
| 1587 | return; |
| 1588 | /* This is called from a tasklet so is in softirq context but the urb |
| 1589 | * list is filled from any context so we need to lock |
| 1590 | * appropriately while removing urbs. |
| 1591 | */ |
| 1592 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1593 | while (!list_empty(&ozhcd->urb_pending_list)) { |
| 1594 | struct oz_urb_link *urbl = |
| 1595 | list_first_entry(&ozhcd->urb_pending_list, |
| 1596 | struct oz_urb_link, link); |
| 1597 | list_del_init(&urbl->link); |
| 1598 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1599 | urb = urbl->urb; |
| 1600 | oz_free_urb_link(urbl); |
| 1601 | rc = oz_urb_process(ozhcd, urb); |
| 1602 | if (rc) |
| 1603 | oz_complete_urb(ozhcd->hcd, urb, rc, 0); |
| 1604 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1605 | } |
| 1606 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1607 | oz_hcd_put(ozhcd); |
| 1608 | } |
| 1609 | /*------------------------------------------------------------------------------ |
| 1610 | * This function searches for the urb in any of the lists it could be in. |
| 1611 | * If it is found it is removed from the list and completed. If the urb is |
| 1612 | * being processed then it won't be in a list so won't be found. However, the |
| 1613 | * call to usb_hcd_check_unlink_urb() will set the value of the unlinked field |
| 1614 | * to a non-zero value. When an attempt is made to put the urb back in a list |
| 1615 | * the unlinked field will be checked and the urb will then be completed. |
| 1616 | * Context: tasklet |
| 1617 | */ |
| 1618 | static void oz_urb_cancel(struct oz_port *port, u8 ep_num, struct urb *urb) |
| 1619 | { |
| 1620 | struct oz_urb_link *urbl = 0; |
| 1621 | struct list_head *e; |
| 1622 | struct oz_hcd *ozhcd; |
| 1623 | unsigned long irq_state; |
| 1624 | u8 ix; |
| 1625 | if (port == 0) { |
| 1626 | oz_trace("ERRORERROR: oz_urb_cancel(%p) port is null\n", urb); |
| 1627 | return; |
| 1628 | } |
| 1629 | ozhcd = port->ozhcd; |
| 1630 | if (ozhcd == 0) { |
| 1631 | oz_trace("ERRORERROR: oz_urb_cancel(%p) ozhcd is null\n", urb); |
| 1632 | return; |
| 1633 | } |
| 1634 | |
| 1635 | /* Look in the tasklet queue. |
| 1636 | */ |
| 1637 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1638 | list_for_each(e, &ozhcd->urb_cancel_list) { |
| 1639 | urbl = container_of(e, struct oz_urb_link, link); |
| 1640 | if (urb == urbl->urb) { |
| 1641 | list_del_init(e); |
| 1642 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1643 | goto out2; |
| 1644 | } |
| 1645 | } |
| 1646 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1647 | urbl = 0; |
| 1648 | |
| 1649 | /* Look in the orphanage. |
| 1650 | */ |
| 1651 | spin_lock_irqsave(&ozhcd->hcd_lock, irq_state); |
| 1652 | list_for_each(e, &ozhcd->orphanage) { |
| 1653 | urbl = container_of(e, struct oz_urb_link, link); |
| 1654 | if (urbl->urb == urb) { |
| 1655 | list_del(e); |
| 1656 | oz_trace("Found urb in orphanage\n"); |
| 1657 | goto out; |
| 1658 | } |
| 1659 | } |
| 1660 | ix = (ep_num & 0xf); |
| 1661 | urbl = 0; |
| 1662 | if ((ep_num & USB_DIR_IN) && ix) |
| 1663 | urbl = oz_remove_urb(port->in_ep[ix], urb); |
| 1664 | else |
| 1665 | urbl = oz_remove_urb(port->out_ep[ix], urb); |
| 1666 | out: |
| 1667 | spin_unlock_irqrestore(&ozhcd->hcd_lock, irq_state); |
| 1668 | out2: |
| 1669 | if (urbl) { |
| 1670 | urb->actual_length = 0; |
| 1671 | oz_free_urb_link(urbl); |
| 1672 | oz_complete_urb(ozhcd->hcd, urb, -EPIPE, 0); |
| 1673 | } |
| 1674 | } |
| 1675 | /*------------------------------------------------------------------------------ |
| 1676 | * Context: tasklet |
| 1677 | */ |
| 1678 | static void oz_urb_cancel_tasklet(unsigned long unused) |
| 1679 | { |
| 1680 | unsigned long irq_state; |
| 1681 | struct urb *urb; |
| 1682 | struct oz_hcd *ozhcd = oz_hcd_claim(); |
| 1683 | if (ozhcd == 0) |
| 1684 | return; |
| 1685 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1686 | while (!list_empty(&ozhcd->urb_cancel_list)) { |
| 1687 | struct oz_urb_link *urbl = |
| 1688 | list_first_entry(&ozhcd->urb_cancel_list, |
| 1689 | struct oz_urb_link, link); |
| 1690 | list_del_init(&urbl->link); |
| 1691 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1692 | urb = urbl->urb; |
| 1693 | if (urb->unlinked) |
| 1694 | oz_urb_cancel(urbl->port, urbl->ep_num, urb); |
| 1695 | oz_free_urb_link(urbl); |
| 1696 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1697 | } |
| 1698 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1699 | oz_hcd_put(ozhcd); |
| 1700 | } |
| 1701 | /*------------------------------------------------------------------------------ |
| 1702 | * Context: unknown |
| 1703 | */ |
| 1704 | static void oz_hcd_clear_orphanage(struct oz_hcd *ozhcd, int status) |
| 1705 | { |
| 1706 | if (ozhcd) { |
| 1707 | struct oz_urb_link *urbl; |
| 1708 | while (!list_empty(&ozhcd->orphanage)) { |
| 1709 | urbl = list_first_entry(&ozhcd->orphanage, |
| 1710 | struct oz_urb_link, link); |
| 1711 | list_del(&urbl->link); |
| 1712 | oz_complete_urb(ozhcd->hcd, urbl->urb, status, 0); |
| 1713 | oz_free_urb_link(urbl); |
| 1714 | } |
| 1715 | } |
| 1716 | } |
| 1717 | /*------------------------------------------------------------------------------ |
| 1718 | * Context: unknown |
| 1719 | */ |
| 1720 | static int oz_hcd_start(struct usb_hcd *hcd) |
| 1721 | { |
| 1722 | oz_trace("oz_hcd_start()\n"); |
| 1723 | hcd->power_budget = 200; |
| 1724 | hcd->state = HC_STATE_RUNNING; |
| 1725 | hcd->uses_new_polling = 1; |
| 1726 | return 0; |
| 1727 | } |
| 1728 | /*------------------------------------------------------------------------------ |
| 1729 | * Context: unknown |
| 1730 | */ |
| 1731 | static void oz_hcd_stop(struct usb_hcd *hcd) |
| 1732 | { |
| 1733 | oz_trace("oz_hcd_stop()\n"); |
| 1734 | } |
| 1735 | /*------------------------------------------------------------------------------ |
| 1736 | * Context: unknown |
| 1737 | */ |
| 1738 | static void oz_hcd_shutdown(struct usb_hcd *hcd) |
| 1739 | { |
| 1740 | oz_trace("oz_hcd_shutdown()\n"); |
| 1741 | } |
| 1742 | /*------------------------------------------------------------------------------ |
| 1743 | * Context: any |
| 1744 | */ |
| 1745 | #ifdef WANT_EVENT_TRACE |
| 1746 | static u8 oz_get_irq_ctx(void) |
| 1747 | { |
| 1748 | u8 irq_info = 0; |
| 1749 | if (in_interrupt()) |
| 1750 | irq_info |= 1; |
| 1751 | if (in_irq()) |
| 1752 | irq_info |= 2; |
| 1753 | return irq_info; |
| 1754 | } |
| 1755 | #endif /* WANT_EVENT_TRACE */ |
| 1756 | /*------------------------------------------------------------------------------ |
| 1757 | * Called to queue an urb for the device. |
| 1758 | * This function should return a non-zero error code if it fails the urb but |
| 1759 | * should not call usb_hcd_giveback_urb(). |
| 1760 | * Context: any |
| 1761 | */ |
| 1762 | static int oz_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, |
| 1763 | gfp_t mem_flags) |
| 1764 | { |
| 1765 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 1766 | int rc = 0; |
| 1767 | int port_ix; |
| 1768 | struct oz_port *port; |
| 1769 | unsigned long irq_state; |
| 1770 | struct oz_urb_link *urbl; |
| 1771 | oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_enqueue(%p)\n", |
| 1772 | jiffies, urb); |
| 1773 | oz_event_log(OZ_EVT_URB_SUBMIT, oz_get_irq_ctx(), |
| 1774 | (u16)urb->number_of_packets, urb, urb->pipe); |
| 1775 | if (unlikely(ozhcd == 0)) { |
| 1776 | oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not ozhcd.\n", |
| 1777 | jiffies, urb); |
| 1778 | return -EPIPE; |
| 1779 | } |
| 1780 | if (unlikely(hcd->state != HC_STATE_RUNNING)) { |
| 1781 | oz_trace2(OZ_TRACE_URB, "%lu: Refused urb(%p) not running.\n", |
| 1782 | jiffies, urb); |
| 1783 | return -EPIPE; |
| 1784 | } |
| 1785 | port_ix = oz_get_port_from_addr(ozhcd, urb->dev->devnum); |
| 1786 | if (port_ix < 0) |
| 1787 | return -EPIPE; |
| 1788 | port = &ozhcd->ports[port_ix]; |
| 1789 | if (port == 0) |
| 1790 | return -EPIPE; |
| 1791 | if ((port->flags & OZ_PORT_F_PRESENT) == 0) { |
| 1792 | oz_trace("Refusing URB port_ix = %d devnum = %d\n", |
| 1793 | port_ix, urb->dev->devnum); |
| 1794 | return -EPIPE; |
| 1795 | } |
| 1796 | urb->hcpriv = port; |
| 1797 | /* Put request in queue for processing by tasklet. |
| 1798 | */ |
| 1799 | urbl = oz_alloc_urb_link(); |
| 1800 | if (unlikely(urbl == 0)) |
| 1801 | return -ENOMEM; |
| 1802 | urbl->urb = urb; |
| 1803 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1804 | rc = usb_hcd_link_urb_to_ep(hcd, urb); |
| 1805 | if (unlikely(rc)) { |
| 1806 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1807 | oz_free_urb_link(urbl); |
| 1808 | return rc; |
| 1809 | } |
| 1810 | list_add_tail(&urbl->link, &ozhcd->urb_pending_list); |
| 1811 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1812 | tasklet_schedule(&g_urb_process_tasklet); |
| 1813 | atomic_inc(&g_pending_urbs); |
| 1814 | return 0; |
| 1815 | } |
| 1816 | /*------------------------------------------------------------------------------ |
| 1817 | * Context: tasklet |
| 1818 | */ |
| 1819 | static struct oz_urb_link *oz_remove_urb(struct oz_endpoint *ep, |
| 1820 | struct urb *urb) |
| 1821 | { |
| 1822 | struct oz_urb_link *urbl = 0; |
| 1823 | struct list_head *e; |
| 1824 | if (unlikely(ep == 0)) |
| 1825 | return 0; |
| 1826 | list_for_each(e, &ep->urb_list) { |
| 1827 | urbl = container_of(e, struct oz_urb_link, link); |
| 1828 | if (urbl->urb == urb) { |
| 1829 | list_del_init(e); |
| 1830 | if (usb_pipeisoc(urb->pipe)) { |
| 1831 | ep->credit -= urb->number_of_packets; |
| 1832 | if (ep->credit < 0) |
| 1833 | ep->credit = 0; |
| 1834 | oz_event_log(OZ_EVT_EP_CREDIT, |
| 1835 | usb_pipein(urb->pipe) ? |
| 1836 | (ep->ep_num | USB_DIR_IN) : ep->ep_num, |
| 1837 | 0, 0, ep->credit); |
| 1838 | } |
| 1839 | return urbl; |
| 1840 | } |
| 1841 | } |
| 1842 | return 0; |
| 1843 | } |
| 1844 | /*------------------------------------------------------------------------------ |
| 1845 | * Called to dequeue a previously submitted urb for the device. |
| 1846 | * Context: any |
| 1847 | */ |
| 1848 | static int oz_hcd_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 1849 | { |
| 1850 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 1851 | struct oz_urb_link *urbl = 0; |
| 1852 | int rc; |
| 1853 | unsigned long irq_state; |
| 1854 | oz_trace2(OZ_TRACE_URB, "%lu: oz_hcd_urb_dequeue(%p)\n", jiffies, urb); |
| 1855 | urbl = oz_alloc_urb_link(); |
| 1856 | if (unlikely(urbl == 0)) |
| 1857 | return -ENOMEM; |
| 1858 | spin_lock_irqsave(&g_tasklet_lock, irq_state); |
| 1859 | /* The following function checks the urb is still in the queue |
| 1860 | * maintained by the core and that the unlinked field is zero. |
| 1861 | * If both are true the function sets the unlinked field and returns |
| 1862 | * zero. Otherwise it returns an error. |
| 1863 | */ |
| 1864 | rc = usb_hcd_check_unlink_urb(hcd, urb, status); |
| 1865 | /* We have to check we haven't completed the urb or are about |
| 1866 | * to complete it. When we do we set hcpriv to 0 so if this has |
| 1867 | * already happened we don't put the urb in the cancel queue. |
| 1868 | */ |
| 1869 | if ((rc == 0) && urb->hcpriv) { |
| 1870 | urbl->urb = urb; |
| 1871 | urbl->port = (struct oz_port *)urb->hcpriv; |
| 1872 | urbl->ep_num = usb_pipeendpoint(urb->pipe); |
| 1873 | if (usb_pipein(urb->pipe)) |
| 1874 | urbl->ep_num |= USB_DIR_IN; |
| 1875 | list_add_tail(&urbl->link, &ozhcd->urb_cancel_list); |
| 1876 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1877 | tasklet_schedule(&g_urb_cancel_tasklet); |
| 1878 | } else { |
| 1879 | spin_unlock_irqrestore(&g_tasklet_lock, irq_state); |
| 1880 | oz_free_urb_link(urbl); |
| 1881 | } |
| 1882 | return rc; |
| 1883 | } |
| 1884 | /*------------------------------------------------------------------------------ |
| 1885 | * Context: unknown |
| 1886 | */ |
| 1887 | static void oz_hcd_endpoint_disable(struct usb_hcd *hcd, |
| 1888 | struct usb_host_endpoint *ep) |
| 1889 | { |
| 1890 | oz_trace("oz_hcd_endpoint_disable\n"); |
| 1891 | } |
| 1892 | /*------------------------------------------------------------------------------ |
| 1893 | * Context: unknown |
| 1894 | */ |
| 1895 | static void oz_hcd_endpoint_reset(struct usb_hcd *hcd, |
| 1896 | struct usb_host_endpoint *ep) |
| 1897 | { |
| 1898 | oz_trace("oz_hcd_endpoint_reset\n"); |
| 1899 | } |
| 1900 | /*------------------------------------------------------------------------------ |
| 1901 | * Context: unknown |
| 1902 | */ |
| 1903 | static int oz_hcd_get_frame_number(struct usb_hcd *hcd) |
| 1904 | { |
| 1905 | oz_trace("oz_hcd_get_frame_number\n"); |
| 1906 | return oz_usb_get_frame_number(); |
| 1907 | } |
| 1908 | /*------------------------------------------------------------------------------ |
| 1909 | * Context: softirq |
| 1910 | * This is called as a consquence of us calling usb_hcd_poll_rh_status() and we |
| 1911 | * always do that in softirq context. |
| 1912 | */ |
| 1913 | static int oz_hcd_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 1914 | { |
| 1915 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 1916 | int i; |
| 1917 | |
| 1918 | oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_status_data()\n"); |
| 1919 | buf[0] = 0; |
| 1920 | |
| 1921 | spin_lock_bh(&ozhcd->hcd_lock); |
| 1922 | for (i = 0; i < OZ_NB_PORTS; i++) { |
| 1923 | if (ozhcd->ports[i].flags & OZ_PORT_F_CHANGED) { |
| 1924 | oz_trace2(OZ_TRACE_HUB, "Port %d changed\n", i); |
| 1925 | ozhcd->ports[i].flags &= ~OZ_PORT_F_CHANGED; |
| 1926 | buf[0] |= 1<<(i+1); |
| 1927 | } |
| 1928 | } |
| 1929 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 1930 | return buf[0] ? 1 : 0; |
| 1931 | } |
| 1932 | /*------------------------------------------------------------------------------ |
| 1933 | * Context: process |
| 1934 | */ |
| 1935 | static void oz_get_hub_descriptor(struct usb_hcd *hcd, |
| 1936 | struct usb_hub_descriptor *desc) |
| 1937 | { |
| 1938 | oz_trace2(OZ_TRACE_HUB, "GetHubDescriptor\n"); |
| 1939 | memset(desc, 0, sizeof(*desc)); |
| 1940 | desc->bDescriptorType = 0x29; |
| 1941 | desc->bDescLength = 9; |
| 1942 | desc->wHubCharacteristics = (__force __u16) |
| 1943 | __constant_cpu_to_le16(0x0001); |
| 1944 | desc->bNbrPorts = OZ_NB_PORTS; |
| 1945 | } |
| 1946 | /*------------------------------------------------------------------------------ |
| 1947 | * Context: process |
| 1948 | */ |
| 1949 | static int oz_set_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex) |
| 1950 | { |
| 1951 | struct oz_port *port; |
| 1952 | int err = 0; |
| 1953 | u8 port_id = (u8)windex; |
| 1954 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 1955 | unsigned set_bits = 0; |
| 1956 | unsigned clear_bits = 0; |
| 1957 | oz_trace2(OZ_TRACE_HUB, "SetPortFeature\n"); |
| 1958 | if ((port_id < 1) || (port_id > OZ_NB_PORTS)) |
| 1959 | return -EPIPE; |
| 1960 | port = &ozhcd->ports[port_id-1]; |
| 1961 | switch (wvalue) { |
| 1962 | case USB_PORT_FEAT_CONNECTION: |
| 1963 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n"); |
| 1964 | break; |
| 1965 | case USB_PORT_FEAT_ENABLE: |
| 1966 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n"); |
| 1967 | break; |
| 1968 | case USB_PORT_FEAT_SUSPEND: |
| 1969 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n"); |
| 1970 | break; |
| 1971 | case USB_PORT_FEAT_OVER_CURRENT: |
| 1972 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n"); |
| 1973 | break; |
| 1974 | case USB_PORT_FEAT_RESET: |
| 1975 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n"); |
| 1976 | set_bits = USB_PORT_STAT_ENABLE | (USB_PORT_STAT_C_RESET<<16); |
| 1977 | clear_bits = USB_PORT_STAT_RESET; |
| 1978 | ozhcd->ports[port_id-1].bus_addr = 0; |
| 1979 | break; |
| 1980 | case USB_PORT_FEAT_POWER: |
| 1981 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n"); |
| 1982 | set_bits |= USB_PORT_STAT_POWER; |
| 1983 | break; |
| 1984 | case USB_PORT_FEAT_LOWSPEED: |
| 1985 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n"); |
| 1986 | break; |
| 1987 | case USB_PORT_FEAT_C_CONNECTION: |
| 1988 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n"); |
| 1989 | break; |
| 1990 | case USB_PORT_FEAT_C_ENABLE: |
| 1991 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n"); |
| 1992 | break; |
| 1993 | case USB_PORT_FEAT_C_SUSPEND: |
| 1994 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n"); |
| 1995 | break; |
| 1996 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 1997 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n"); |
| 1998 | break; |
| 1999 | case USB_PORT_FEAT_C_RESET: |
| 2000 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n"); |
| 2001 | break; |
| 2002 | case USB_PORT_FEAT_TEST: |
| 2003 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n"); |
| 2004 | break; |
| 2005 | case USB_PORT_FEAT_INDICATOR: |
| 2006 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n"); |
| 2007 | break; |
| 2008 | default: |
| 2009 | oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue); |
| 2010 | break; |
| 2011 | } |
| 2012 | if (set_bits || clear_bits) { |
| 2013 | spin_lock_bh(&port->port_lock); |
| 2014 | port->status &= ~clear_bits; |
| 2015 | port->status |= set_bits; |
| 2016 | spin_unlock_bh(&port->port_lock); |
| 2017 | } |
| 2018 | oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id, |
| 2019 | port->status); |
| 2020 | return err; |
| 2021 | } |
| 2022 | /*------------------------------------------------------------------------------ |
| 2023 | * Context: process |
| 2024 | */ |
| 2025 | static int oz_clear_port_feature(struct usb_hcd *hcd, u16 wvalue, u16 windex) |
| 2026 | { |
| 2027 | struct oz_port *port; |
| 2028 | int err = 0; |
| 2029 | u8 port_id = (u8)windex; |
| 2030 | struct oz_hcd *ozhcd = oz_hcd_private(hcd); |
| 2031 | unsigned clear_bits = 0; |
| 2032 | oz_trace2(OZ_TRACE_HUB, "ClearPortFeature\n"); |
| 2033 | if ((port_id < 1) || (port_id > OZ_NB_PORTS)) |
| 2034 | return -EPIPE; |
| 2035 | port = &ozhcd->ports[port_id-1]; |
| 2036 | switch (wvalue) { |
| 2037 | case USB_PORT_FEAT_CONNECTION: |
| 2038 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_CONNECTION\n"); |
| 2039 | break; |
| 2040 | case USB_PORT_FEAT_ENABLE: |
| 2041 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_ENABLE\n"); |
| 2042 | clear_bits = USB_PORT_STAT_ENABLE; |
| 2043 | break; |
| 2044 | case USB_PORT_FEAT_SUSPEND: |
| 2045 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_SUSPEND\n"); |
| 2046 | break; |
| 2047 | case USB_PORT_FEAT_OVER_CURRENT: |
| 2048 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_OVER_CURRENT\n"); |
| 2049 | break; |
| 2050 | case USB_PORT_FEAT_RESET: |
| 2051 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_RESET\n"); |
| 2052 | break; |
| 2053 | case USB_PORT_FEAT_POWER: |
| 2054 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_POWER\n"); |
| 2055 | clear_bits |= USB_PORT_STAT_POWER; |
| 2056 | break; |
| 2057 | case USB_PORT_FEAT_LOWSPEED: |
| 2058 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_LOWSPEED\n"); |
| 2059 | break; |
| 2060 | case USB_PORT_FEAT_C_CONNECTION: |
| 2061 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_CONNECTION\n"); |
| 2062 | clear_bits = (USB_PORT_STAT_C_CONNECTION << 16); |
| 2063 | break; |
| 2064 | case USB_PORT_FEAT_C_ENABLE: |
| 2065 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_ENABLE\n"); |
| 2066 | clear_bits = (USB_PORT_STAT_C_ENABLE << 16); |
| 2067 | break; |
| 2068 | case USB_PORT_FEAT_C_SUSPEND: |
| 2069 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_SUSPEND\n"); |
| 2070 | break; |
| 2071 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 2072 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_OVER_CURRENT\n"); |
| 2073 | break; |
| 2074 | case USB_PORT_FEAT_C_RESET: |
| 2075 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_C_RESET\n"); |
| 2076 | clear_bits = (USB_PORT_FEAT_C_RESET << 16); |
| 2077 | break; |
| 2078 | case USB_PORT_FEAT_TEST: |
| 2079 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_TEST\n"); |
| 2080 | break; |
| 2081 | case USB_PORT_FEAT_INDICATOR: |
| 2082 | oz_trace2(OZ_TRACE_HUB, "USB_PORT_FEAT_INDICATOR\n"); |
| 2083 | break; |
| 2084 | default: |
| 2085 | oz_trace2(OZ_TRACE_HUB, "Other %d\n", wvalue); |
| 2086 | break; |
| 2087 | } |
| 2088 | if (clear_bits) { |
| 2089 | spin_lock_bh(&port->port_lock); |
| 2090 | port->status &= ~clear_bits; |
| 2091 | spin_unlock_bh(&port->port_lock); |
| 2092 | } |
| 2093 | oz_trace2(OZ_TRACE_HUB, "Port[%d] status = 0x%x\n", port_id, |
| 2094 | ozhcd->ports[port_id-1].status); |
| 2095 | return err; |
| 2096 | } |
| 2097 | /*------------------------------------------------------------------------------ |
| 2098 | * Context: process |
| 2099 | */ |
| 2100 | static int oz_get_port_status(struct usb_hcd *hcd, u16 windex, char *buf) |
| 2101 | { |
| 2102 | struct oz_hcd *ozhcd; |
| 2103 | u32 status = 0; |
| 2104 | if ((windex < 1) || (windex > OZ_NB_PORTS)) |
| 2105 | return -EPIPE; |
| 2106 | ozhcd = oz_hcd_private(hcd); |
| 2107 | oz_trace2(OZ_TRACE_HUB, "GetPortStatus windex = %d\n", windex); |
| 2108 | status = ozhcd->ports[windex-1].status; |
| 2109 | put_unaligned(cpu_to_le32(status), (__le32 *)buf); |
| 2110 | oz_trace2(OZ_TRACE_HUB, "Port[%d] status = %x\n", windex, status); |
| 2111 | return 0; |
| 2112 | } |
| 2113 | /*------------------------------------------------------------------------------ |
| 2114 | * Context: process |
| 2115 | */ |
| 2116 | static int oz_hcd_hub_control(struct usb_hcd *hcd, u16 req_type, u16 wvalue, |
| 2117 | u16 windex, char *buf, u16 wlength) |
| 2118 | { |
| 2119 | int err = 0; |
| 2120 | oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_control()\n"); |
| 2121 | switch (req_type) { |
| 2122 | case ClearHubFeature: |
| 2123 | oz_trace2(OZ_TRACE_HUB, "ClearHubFeature: %d\n", req_type); |
| 2124 | break; |
| 2125 | case ClearPortFeature: |
| 2126 | err = oz_clear_port_feature(hcd, wvalue, windex); |
| 2127 | break; |
| 2128 | case GetHubDescriptor: |
| 2129 | oz_get_hub_descriptor(hcd, (struct usb_hub_descriptor *)buf); |
| 2130 | break; |
| 2131 | case GetHubStatus: |
| 2132 | oz_trace2(OZ_TRACE_HUB, "GetHubStatus: req_type = 0x%x\n", |
| 2133 | req_type); |
| 2134 | put_unaligned(__constant_cpu_to_le32(0), (__le32 *)buf); |
| 2135 | break; |
| 2136 | case GetPortStatus: |
| 2137 | err = oz_get_port_status(hcd, windex, buf); |
| 2138 | break; |
| 2139 | case SetHubFeature: |
| 2140 | oz_trace2(OZ_TRACE_HUB, "SetHubFeature: %d\n", req_type); |
| 2141 | break; |
| 2142 | case SetPortFeature: |
| 2143 | err = oz_set_port_feature(hcd, wvalue, windex); |
| 2144 | break; |
| 2145 | default: |
| 2146 | oz_trace2(OZ_TRACE_HUB, "Other: %d\n", req_type); |
| 2147 | break; |
| 2148 | } |
| 2149 | return err; |
| 2150 | } |
| 2151 | /*------------------------------------------------------------------------------ |
| 2152 | * Context: process |
| 2153 | */ |
| 2154 | static int oz_hcd_bus_suspend(struct usb_hcd *hcd) |
| 2155 | { |
| 2156 | struct oz_hcd *ozhcd; |
| 2157 | oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_suspend()\n"); |
| 2158 | ozhcd = oz_hcd_private(hcd); |
| 2159 | spin_lock_bh(&ozhcd->hcd_lock); |
| 2160 | hcd->state = HC_STATE_SUSPENDED; |
| 2161 | ozhcd->flags |= OZ_HDC_F_SUSPENDED; |
| 2162 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 2163 | return 0; |
| 2164 | } |
| 2165 | /*------------------------------------------------------------------------------ |
| 2166 | * Context: process |
| 2167 | */ |
| 2168 | static int oz_hcd_bus_resume(struct usb_hcd *hcd) |
| 2169 | { |
| 2170 | struct oz_hcd *ozhcd; |
| 2171 | oz_trace2(OZ_TRACE_HUB, "oz_hcd_hub_resume()\n"); |
| 2172 | ozhcd = oz_hcd_private(hcd); |
| 2173 | spin_lock_bh(&ozhcd->hcd_lock); |
| 2174 | ozhcd->flags &= ~OZ_HDC_F_SUSPENDED; |
| 2175 | hcd->state = HC_STATE_RUNNING; |
| 2176 | spin_unlock_bh(&ozhcd->hcd_lock); |
| 2177 | return 0; |
| 2178 | } |
| 2179 | /*------------------------------------------------------------------------------ |
| 2180 | */ |
| 2181 | static void oz_plat_shutdown(struct platform_device *dev) |
| 2182 | { |
| 2183 | oz_trace("oz_plat_shutdown()\n"); |
| 2184 | } |
| 2185 | /*------------------------------------------------------------------------------ |
| 2186 | * Context: process |
| 2187 | */ |
| 2188 | static int oz_plat_probe(struct platform_device *dev) |
| 2189 | { |
| 2190 | int i; |
| 2191 | int err; |
| 2192 | struct usb_hcd *hcd; |
| 2193 | struct oz_hcd *ozhcd; |
| 2194 | oz_trace("oz_plat_probe()\n"); |
| 2195 | hcd = usb_create_hcd(&g_oz_hc_drv, &dev->dev, dev_name(&dev->dev)); |
| 2196 | if (hcd == 0) { |
| 2197 | oz_trace("Failed to created hcd object OK\n"); |
| 2198 | return -ENOMEM; |
| 2199 | } |
| 2200 | ozhcd = oz_hcd_private(hcd); |
| 2201 | memset(ozhcd, 0, sizeof(*ozhcd)); |
| 2202 | INIT_LIST_HEAD(&ozhcd->urb_pending_list); |
| 2203 | INIT_LIST_HEAD(&ozhcd->urb_cancel_list); |
| 2204 | INIT_LIST_HEAD(&ozhcd->orphanage); |
| 2205 | ozhcd->hcd = hcd; |
| 2206 | ozhcd->conn_port = -1; |
| 2207 | spin_lock_init(&ozhcd->hcd_lock); |
| 2208 | for (i = 0; i < OZ_NB_PORTS; i++) { |
| 2209 | struct oz_port *port = &ozhcd->ports[i]; |
| 2210 | port->ozhcd = ozhcd; |
| 2211 | port->flags = 0; |
| 2212 | port->status = 0; |
| 2213 | port->bus_addr = 0xff; |
| 2214 | spin_lock_init(&port->port_lock); |
| 2215 | } |
| 2216 | err = usb_add_hcd(hcd, 0, 0); |
| 2217 | if (err) { |
| 2218 | oz_trace("Failed to add hcd object OK\n"); |
| 2219 | usb_put_hcd(hcd); |
| 2220 | return -1; |
| 2221 | } |
| 2222 | spin_lock_bh(&g_hcdlock); |
| 2223 | g_ozhcd = ozhcd; |
| 2224 | spin_unlock_bh(&g_hcdlock); |
| 2225 | return 0; |
| 2226 | } |
| 2227 | /*------------------------------------------------------------------------------ |
| 2228 | * Context: unknown |
| 2229 | */ |
| 2230 | static int oz_plat_remove(struct platform_device *dev) |
| 2231 | { |
| 2232 | struct usb_hcd *hcd = platform_get_drvdata(dev); |
| 2233 | struct oz_hcd *ozhcd; |
| 2234 | oz_trace("oz_plat_remove()\n"); |
| 2235 | if (hcd == 0) |
| 2236 | return -1; |
| 2237 | ozhcd = oz_hcd_private(hcd); |
| 2238 | spin_lock_bh(&g_hcdlock); |
| 2239 | if (ozhcd == g_ozhcd) |
| 2240 | g_ozhcd = 0; |
| 2241 | spin_unlock_bh(&g_hcdlock); |
| 2242 | oz_trace("Clearing orphanage\n"); |
| 2243 | oz_hcd_clear_orphanage(ozhcd, -EPIPE); |
| 2244 | oz_trace("Removing hcd\n"); |
| 2245 | usb_remove_hcd(hcd); |
| 2246 | usb_put_hcd(hcd); |
| 2247 | oz_empty_link_pool(); |
| 2248 | return 0; |
| 2249 | } |
| 2250 | /*------------------------------------------------------------------------------ |
| 2251 | * Context: unknown |
| 2252 | */ |
| 2253 | static int oz_plat_suspend(struct platform_device *dev, pm_message_t msg) |
| 2254 | { |
| 2255 | oz_trace("oz_plat_suspend()\n"); |
| 2256 | return 0; |
| 2257 | } |
| 2258 | /*------------------------------------------------------------------------------ |
| 2259 | * Context: unknown |
| 2260 | */ |
| 2261 | static int oz_plat_resume(struct platform_device *dev) |
| 2262 | { |
| 2263 | oz_trace("oz_plat_resume()\n"); |
| 2264 | return 0; |
| 2265 | } |
| 2266 | /*------------------------------------------------------------------------------ |
| 2267 | * Context: process |
| 2268 | */ |
| 2269 | int oz_hcd_init(void) |
| 2270 | { |
| 2271 | int err; |
| 2272 | if (usb_disabled()) |
| 2273 | return -ENODEV; |
| 2274 | tasklet_init(&g_urb_process_tasklet, oz_urb_process_tasklet, 0); |
| 2275 | tasklet_init(&g_urb_cancel_tasklet, oz_urb_cancel_tasklet, 0); |
| 2276 | err = platform_driver_register(&g_oz_plat_drv); |
| 2277 | oz_trace("platform_driver_register() returned %d\n", err); |
| 2278 | if (err) |
| 2279 | goto error; |
| 2280 | g_plat_dev = platform_device_alloc(OZ_PLAT_DEV_NAME, -1); |
| 2281 | if (g_plat_dev == 0) { |
| 2282 | err = -ENOMEM; |
| 2283 | goto error1; |
| 2284 | } |
| 2285 | oz_trace("platform_device_alloc() succeeded\n"); |
| 2286 | err = platform_device_add(g_plat_dev); |
| 2287 | if (err) |
| 2288 | goto error2; |
| 2289 | oz_trace("platform_device_add() succeeded\n"); |
| 2290 | return 0; |
| 2291 | error2: |
| 2292 | platform_device_put(g_plat_dev); |
| 2293 | error1: |
| 2294 | platform_driver_unregister(&g_oz_plat_drv); |
| 2295 | error: |
| 2296 | tasklet_disable(&g_urb_process_tasklet); |
| 2297 | tasklet_disable(&g_urb_cancel_tasklet); |
| 2298 | oz_trace("oz_hcd_init() failed %d\n", err); |
| 2299 | return err; |
| 2300 | } |
| 2301 | /*------------------------------------------------------------------------------ |
| 2302 | * Context: process |
| 2303 | */ |
| 2304 | void oz_hcd_term(void) |
| 2305 | { |
Xiaotian Feng | 984a4a0 | 2012-10-31 18:56:48 +0800 | [diff] [blame] | 2306 | tasklet_kill(&g_urb_process_tasklet); |
| 2307 | tasklet_kill(&g_urb_cancel_tasklet); |
Chris Kelly | ae92605 | 2012-02-20 21:11:53 +0000 | [diff] [blame] | 2308 | platform_device_unregister(g_plat_dev); |
| 2309 | platform_driver_unregister(&g_oz_plat_drv); |
| 2310 | oz_trace("Pending urbs:%d\n", atomic_read(&g_pending_urbs)); |
| 2311 | } |