Changeset 361e61b in mainline for uspace/drv/uhci-hcd/uhci.c


Ignore:
Timestamp:
2011-03-21T14:23:15Z (13 years ago)
Author:
Matej Klonfar <maklf@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
55e388a1
Parents:
c32688d (diff), 48fe0c9 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

merge with development

File:
1 edited

Legend:

Unmodified
Added
Removed

  • uspace/drv/uhci-hcd/uhci.c

    rc32688d r361e61b  
    2626 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    2727 */
    28 /** @addtogroup usb
     28
     29/** @addtogroup drvusbuhci
    2930 * @{
    3031 */
    … …  
    3435#include <errno.h>
    3536#include <str_error.h>
    36 #include <adt/list.h>
    37 #include <libarch/ddi.h>
    38 
     37#include <ddf/interrupt.h>
     38#include <usb_iface.h>
     39#include <usb/ddfiface.h>
    3940#include <usb/debug.h>
    40 #include <usb/usb.h>
    41 #include <usb/ddfiface.h>
    42 #include <usb_iface.h>
    4341
    4442#include "uhci.h"
    4543#include "iface.h"
    46 
    47 static irq_cmd_t uhci_cmds[] = {
    48         {
    49                 .cmd = CMD_PIO_READ_16,
    50                 .addr = NULL, /* patched for every instance */
    51                 .dstarg = 1
    52         },
    53         {
    54                 .cmd = CMD_PIO_WRITE_16,
    55                 .addr = NULL, /* pathed for every instance */
    56                 .value = 0x1f
    57         },
    58         {
    59                 .cmd = CMD_ACCEPT
    60         }
    61 };
    62 
    63 /** Gets USB address of the calling device.
    64  *
    65  * @param[in] fun UHCI hc function.
    66  * @param[in] handle Handle of the device seeking address.
    67  * @param[out] address Place to store found address.
    68  * @return Error code.
     44#include "pci.h"
     45
     46
     47/** IRQ handling callback, identifies device
     48 *
     49 * @param[in] dev DDF instance of the device to use.
     50 * @param[in] iid (Unused).
     51 * @param[in] call Pointer to the call that represents interrupt.
     52 */
     53static void irq_handler(ddf_dev_t *dev, ipc_callid_t iid, ipc_call_t *call)
     54{
     55        assert(dev);
     56        uhci_hc_t *hc = &((uhci_t*)dev->driver_data)->hc;
     57        uint16_t status = IPC_GET_ARG1(*call);
     58        assert(hc);
     59        uhci_hc_interrupt(hc, status);
     60}
     61/*----------------------------------------------------------------------------*/
     62/** Get address of the device identified by handle.
     63 *
     64 * @param[in] dev DDF instance of the device to use.
     65 * @param[in] iid (Unused).
     66 * @param[in] call Pointer to the call that represents interrupt.
    6967 */
    7068static int usb_iface_get_address(
    … …  
    7270{
    7371        assert(fun);
    74         uhci_t *hc = fun_to_uhci(fun);
    75         assert(hc);
    76 
    77         usb_address_t addr = device_keeper_find(&hc->device_manager,
    78             handle);
     72        device_keeper_t *manager = &((uhci_t*)fun->dev->driver_data)->hc.device_manager;
     73
     74        usb_address_t addr = device_keeper_find(manager, handle);
    7975        if (addr < 0) {
    8076                return addr;
    … …  
    8884}
    8985/*----------------------------------------------------------------------------*/
    90 static usb_iface_t hc_usb_iface = {
    91         .get_hc_handle = usb_iface_get_hc_handle_hc_impl,
     86/** Gets handle of the respective hc (this or parent device).
     87 *
     88 * @param[in] root_hub_fun Root hub function seeking hc handle.
     89 * @param[out] handle Place to write the handle.
     90 * @return Error code.
     91 */
     92static int usb_iface_get_hc_handle(
     93    ddf_fun_t *fun, devman_handle_t *handle)
     94{
     95        assert(handle);
     96        ddf_fun_t *hc_fun = ((uhci_t*)fun->dev->driver_data)->hc_fun;
     97        assert(hc_fun != NULL);
     98
     99        *handle = hc_fun->handle;
     100        return EOK;
     101}
     102/*----------------------------------------------------------------------------*/
     103/** This iface is generic for both RH and HC. */
     104static usb_iface_t usb_iface = {
     105        .get_hc_handle = usb_iface_get_hc_handle,
    92106        .get_address = usb_iface_get_address
    93107};
    94108/*----------------------------------------------------------------------------*/
    95 static ddf_dev_ops_t uhci_ops = {
    96         .interfaces[USB_DEV_IFACE] = &hc_usb_iface,
    97         .interfaces[USBHC_DEV_IFACE] = &uhci_iface,
    98 };
    99 /*----------------------------------------------------------------------------*/
    100 static int uhci_init_transfer_lists(uhci_t *instance);
    101 static int uhci_init_mem_structures(uhci_t *instance);
    102 static void uhci_init_hw(uhci_t *instance);
    103 
    104 static int uhci_interrupt_emulator(void *arg);
    105 static int uhci_debug_checker(void *arg);
    106 
    107 static bool allowed_usb_packet(
    108     bool low_speed, usb_transfer_type_t transfer, size_t size);
    109 /*----------------------------------------------------------------------------*/
    110 /** Initializes UHCI hcd driver structure
    111  *
    112  * @param[in] instance Memory place to initialize.
    113  * @param[in] dev DDF device.
    114  * @param[in] regs Address of I/O control registers.
    115  * @param[in] size Size of I/O control registers.
    116  * @return Error code.
    117  * @note Should be called only once on any structure.
    118  */
    119 int uhci_init(uhci_t *instance, ddf_dev_t *dev, void *regs, size_t reg_size)
    120 {
    121         assert(reg_size >= sizeof(regs_t));
    122         int ret;
    123 
     109static ddf_dev_ops_t uhci_hc_ops = {
     110        .interfaces[USB_DEV_IFACE] = &usb_iface,
     111        .interfaces[USBHC_DEV_IFACE] = &uhci_hc_iface, /* see iface.h/c */
     112};
     113/*----------------------------------------------------------------------------*/
     114/** Get root hub hw resources (I/O registers).
     115 *
     116 * @param[in] fun Root hub function.
     117 * @return Pointer to the resource list used by the root hub.
     118 */
     119static hw_resource_list_t *get_resource_list(ddf_fun_t *fun)
     120{
     121        assert(fun);
     122        return &((uhci_rh_t*)fun->driver_data)->resource_list;
     123}
     124/*----------------------------------------------------------------------------*/
     125static hw_res_ops_t hw_res_iface = {
     126        .get_resource_list = get_resource_list,
     127        .enable_interrupt = NULL
     128};
     129/*----------------------------------------------------------------------------*/
     130static ddf_dev_ops_t uhci_rh_ops = {
     131        .interfaces[USB_DEV_IFACE] = &usb_iface,
     132        .interfaces[HW_RES_DEV_IFACE] = &hw_res_iface
     133};
     134/*----------------------------------------------------------------------------*/
     135/** Initialize hc and rh ddf structures and their respective drivers.
     136 *
     137 * @param[in] instance UHCI structure to use.
     138 * @param[in] device DDF instance of the device to use.
     139 *
     140 * This function does all the preparatory work for hc and rh drivers:
     141 *  - gets device hw resources
     142 *  - disables UHCI legacy support
     143 *  - asks for interrupt
     144 *  - registers interrupt handler
     145 */
     146int uhci_init(uhci_t *instance, ddf_dev_t *device)
     147{
     148        assert(instance);
     149        instance->hc_fun = NULL;
     150        instance->rh_fun = NULL;
    124151#define CHECK_RET_DEST_FUN_RETURN(ret, message...) \
    125         if (ret != EOK) { \
    126                 usb_log_error(message); \
    127                 if (instance->ddf_instance) \
    128                         ddf_fun_destroy(instance->ddf_instance); \
    129                 return ret; \
    130         } else (void) 0
    131 
    132         /* Create UHCI function. */
    133         instance->ddf_instance = ddf_fun_create(dev, fun_exposed, "uhci");
    134         ret = (instance->ddf_instance == NULL) ? ENOMEM : EOK;
    135         CHECK_RET_DEST_FUN_RETURN(ret,
    136             "Failed to create UHCI device function.\n");
    137 
    138         instance->ddf_instance->ops = &uhci_ops;
    139         instance->ddf_instance->driver_data = instance;
    140 
    141         ret = ddf_fun_bind(instance->ddf_instance);
     152if (ret != EOK) { \
     153        usb_log_error(message); \
     154        if (instance->hc_fun) \
     155                ddf_fun_destroy(instance->hc_fun); \
     156        if (instance->rh_fun) \
     157                ddf_fun_destroy(instance->rh_fun); \
     158        return ret; \
     159}
     160
     161        uintptr_t io_reg_base = 0;
     162        size_t io_reg_size = 0;
     163        int irq = 0;
     164
     165        int ret =
     166            pci_get_my_registers(device, &io_reg_base, &io_reg_size, &irq);
     167        CHECK_RET_DEST_FUN_RETURN(ret,
     168            "Failed(%d) to get I/O addresses:.\n", ret, device->handle);
     169        usb_log_info("I/O regs at 0x%X (size %zu), IRQ %d.\n",
     170            io_reg_base, io_reg_size, irq);
     171
     172        ret = pci_disable_legacy(device);
     173        CHECK_RET_DEST_FUN_RETURN(ret,
     174            "Failed(%d) to disable legacy USB: %s.\n", ret, str_error(ret));
     175
     176        bool interrupts = false;
     177        ret = pci_enable_interrupts(device);
     178        if (ret != EOK) {
     179                usb_log_warning(
     180                    "Failed(%d) to enable interrupts, fall back to polling.\n",
     181                    ret);
     182        } else {
     183                usb_log_debug("Hw interrupts enabled.\n");
     184                interrupts = true;
     185        }
     186
     187        instance->hc_fun = ddf_fun_create(device, fun_exposed, "uhci-hc");
     188        ret = (instance->hc_fun == NULL) ? ENOMEM : EOK;
     189        CHECK_RET_DEST_FUN_RETURN(ret,
     190            "Failed(%d) to create HC function.\n", ret);
     191
     192        ret = uhci_hc_init(&instance->hc, instance->hc_fun,
     193            (void*)io_reg_base, io_reg_size, interrupts);
     194        CHECK_RET_DEST_FUN_RETURN(ret, "Failed(%d) to init uhci-hcd.\n", ret);
     195        instance->hc_fun->ops = &uhci_hc_ops;
     196        instance->hc_fun->driver_data = &instance->hc;
     197        ret = ddf_fun_bind(instance->hc_fun);
    142198        CHECK_RET_DEST_FUN_RETURN(ret,
    143199            "Failed(%d) to bind UHCI device function: %s.\n",
    144200            ret, str_error(ret));
    145 
    146         /* allow access to hc control registers */
    147         regs_t *io;
    148         ret = pio_enable(regs, reg_size, (void**)&io);
    149         CHECK_RET_DEST_FUN_RETURN(ret,
    150             "Failed(%d) to gain access to registers at %p: %s.\n",
    151             ret, str_error(ret), io);
    152         instance->registers = io;
    153         usb_log_debug("Device registers at %p(%u) accessible.\n",
    154             io, reg_size);
    155 
    156         ret = uhci_init_mem_structures(instance);
    157         CHECK_RET_DEST_FUN_RETURN(ret,
    158             "Failed to initialize UHCI memory structures.\n");
    159 
    160         uhci_init_hw(instance);
    161         instance->cleaner =
    162             fibril_create(uhci_interrupt_emulator, instance);
    163         fibril_add_ready(instance->cleaner);
    164 
    165         instance->debug_checker = fibril_create(uhci_debug_checker, instance);
    166         fibril_add_ready(instance->debug_checker);
    167 
    168         usb_log_info("Started UHCI driver.\n");
     201#undef CHECK_RET_HC_RETURN
     202
     203#define CHECK_RET_FINI_RETURN(ret, message...) \
     204if (ret != EOK) { \
     205        usb_log_error(message); \
     206        if (instance->hc_fun) \
     207                ddf_fun_destroy(instance->hc_fun); \
     208        if (instance->rh_fun) \
     209                ddf_fun_destroy(instance->rh_fun); \
     210        uhci_hc_fini(&instance->hc); \
     211        return ret; \
     212}
     213
     214        /* It does no harm if we register this on polling */
     215        ret = register_interrupt_handler(device, irq, irq_handler,
     216            &instance->hc.interrupt_code);
     217        CHECK_RET_FINI_RETURN(ret,
     218            "Failed(%d) to register interrupt handler.\n", ret);
     219
     220        instance->rh_fun = ddf_fun_create(device, fun_inner, "uhci-rh");
     221        ret = (instance->rh_fun == NULL) ? ENOMEM : EOK;
     222        CHECK_RET_FINI_RETURN(ret,
     223            "Failed(%d) to create root hub function.\n", ret);
     224
     225        ret = uhci_rh_init(&instance->rh, instance->rh_fun,
     226            (uintptr_t)instance->hc.registers + 0x10, 4);
     227        CHECK_RET_FINI_RETURN(ret,
     228            "Failed(%d) to setup UHCI root hub.\n", ret);
     229
     230        instance->rh_fun->ops = &uhci_rh_ops;
     231        instance->rh_fun->driver_data = &instance->rh;
     232        ret = ddf_fun_bind(instance->rh_fun);
     233        CHECK_RET_FINI_RETURN(ret,
     234            "Failed(%d) to register UHCI root hub.\n", ret);
     235
    169236        return EOK;
    170 #undef CHECK_RET_DEST_FUN_RETURN
    171 }
    172 /*----------------------------------------------------------------------------*/
    173 /** Initializes UHCI hcd hw resources.
    174  *
    175  * @param[in] instance UHCI structure to use.
    176  */
    177 void uhci_init_hw(uhci_t *instance)
    178 {
    179         assert(instance);
    180         regs_t *registers = instance->registers;
    181 
    182         /* Reset everything, who knows what touched it before us */
    183         pio_write_16(&registers->usbcmd, UHCI_CMD_GLOBAL_RESET);
    184         async_usleep(10000); /* 10ms according to USB spec */
    185         pio_write_16(&registers->usbcmd, 0);
    186 
    187         /* Reset hc, all states and counters */
    188         pio_write_16(&registers->usbcmd, UHCI_CMD_HCRESET);
    189         do { async_usleep(10); }
    190         while ((pio_read_16(&registers->usbcmd) & UHCI_CMD_HCRESET) != 0);
    191 
    192         /* Set framelist pointer */
    193         const uint32_t pa = addr_to_phys(instance->frame_list);
    194         pio_write_32(&registers->flbaseadd, pa);
    195 
    196         /* Enable all interrupts, but resume interrupt */
    197 //      pio_write_16(&instance->registers->usbintr,
    198 //          UHCI_INTR_CRC | UHCI_INTR_COMPLETE | UHCI_INTR_SHORT_PACKET);
    199 
    200         uint16_t status = pio_read_16(&registers->usbcmd);
    201         if (status != 0)
    202                 usb_log_warning("Previous command value: %x.\n", status);
    203 
    204         /* Start the hc with large(64B) packet FSBR */
    205         pio_write_16(&registers->usbcmd,
    206             UHCI_CMD_RUN_STOP | UHCI_CMD_MAX_PACKET | UHCI_CMD_CONFIGURE);
    207 }
    208 /*----------------------------------------------------------------------------*/
    209 /** Initializes UHCI hcd memory structures.
    210  *
    211  * @param[in] instance UHCI structure to use.
    212  * @return Error code
    213  * @note Should be called only once on any structure.
    214  */
    215 int uhci_init_mem_structures(uhci_t *instance)
    216 {
    217         assert(instance);
    218 #define CHECK_RET_DEST_CMDS_RETURN(ret, message...) \
    219         if (ret != EOK) { \
    220                 usb_log_error(message); \
    221                 if (instance->interrupt_code.cmds != NULL) \
    222                         free(instance->interrupt_code.cmds); \
    223                 return ret; \
    224         } else (void) 0
    225 
    226         /* Init interrupt code */
    227         instance->interrupt_code.cmds = malloc(sizeof(uhci_cmds));
    228         int ret = (instance->interrupt_code.cmds == NULL) ? ENOMEM : EOK;
    229         CHECK_RET_DEST_CMDS_RETURN(ret,
    230             "Failed to allocate interrupt cmds space.\n");
    231 
    232         {
    233                 irq_cmd_t *interrupt_commands = instance->interrupt_code.cmds;
    234                 memcpy(interrupt_commands, uhci_cmds, sizeof(uhci_cmds));
    235                 interrupt_commands[0].addr =
    236                     (void*)&instance->registers->usbsts;
    237                 interrupt_commands[1].addr =
    238                     (void*)&instance->registers->usbsts;
    239                 instance->interrupt_code.cmdcount =
    240                     sizeof(uhci_cmds) / sizeof(irq_cmd_t);
    241         }
    242 
    243         /* Init transfer lists */
    244         ret = uhci_init_transfer_lists(instance);
    245         CHECK_RET_DEST_CMDS_RETURN(ret, "Failed to init transfer lists.\n");
    246         usb_log_debug("Initialized transfer lists.\n");
    247 
    248         /* Init USB frame list page*/
    249         instance->frame_list = get_page();
    250         ret = instance ? EOK : ENOMEM;
    251         CHECK_RET_DEST_CMDS_RETURN(ret, "Failed to get frame list page.\n");
    252         usb_log_debug("Initialized frame list.\n");
    253 
    254         /* Set all frames to point to the first queue head */
    255         const uint32_t queue =
    256           instance->transfers_interrupt.queue_head_pa
    257           | LINK_POINTER_QUEUE_HEAD_FLAG;
    258 
    259         unsigned i = 0;
    260         for(; i < UHCI_FRAME_LIST_COUNT; ++i) {
    261                 instance->frame_list[i] = queue;
    262         }
    263 
    264         /* Init device keeper*/
    265         device_keeper_init(&instance->device_manager);
    266         usb_log_debug("Initialized device manager.\n");
    267 
    268         return EOK;
    269 #undef CHECK_RET_DEST_CMDS_RETURN
    270 }
    271 /*----------------------------------------------------------------------------*/
    272 /** Initializes UHCI hcd transfer lists.
    273  *
    274  * @param[in] instance UHCI structure to use.
    275  * @return Error code
    276  * @note Should be called only once on any structure.
    277  */
    278 int uhci_init_transfer_lists(uhci_t *instance)
    279 {
    280         assert(instance);
    281 #define CHECK_RET_CLEAR_RETURN(ret, message...) \
    282         if (ret != EOK) { \
    283                 usb_log_error(message); \
    284                 transfer_list_fini(&instance->transfers_bulk_full); \
    285                 transfer_list_fini(&instance->transfers_control_full); \
    286                 transfer_list_fini(&instance->transfers_control_slow); \
    287                 transfer_list_fini(&instance->transfers_interrupt); \
    288                 return ret; \
    289         } else (void) 0
    290 
    291         /* initialize TODO: check errors */
    292         int ret;
    293         ret = transfer_list_init(&instance->transfers_bulk_full, "BULK_FULL");
    294         CHECK_RET_CLEAR_RETURN(ret, "Failed to init BULK list.");
    295 
    296         ret = transfer_list_init(
    297             &instance->transfers_control_full, "CONTROL_FULL");
    298         CHECK_RET_CLEAR_RETURN(ret, "Failed to init CONTROL FULL list.");
    299 
    300         ret = transfer_list_init(
    301             &instance->transfers_control_slow, "CONTROL_SLOW");
    302         CHECK_RET_CLEAR_RETURN(ret, "Failed to init CONTROL SLOW list.");
    303 
    304         ret = transfer_list_init(&instance->transfers_interrupt, "INTERRUPT");
    305         CHECK_RET_CLEAR_RETURN(ret, "Failed to init INTERRUPT list.");
    306 
    307         transfer_list_set_next(&instance->transfers_control_full,
    308                 &instance->transfers_bulk_full);
    309         transfer_list_set_next(&instance->transfers_control_slow,
    310                 &instance->transfers_control_full);
    311         transfer_list_set_next(&instance->transfers_interrupt,
    312                 &instance->transfers_control_slow);
    313 
    314         /*FSBR*/
    315 #ifdef FSBR
    316         transfer_list_set_next(&instance->transfers_bulk_full,
    317                 &instance->transfers_control_full);
    318 #endif
    319 
    320         /* Assign pointers to be used during scheduling */
    321         instance->transfers[USB_SPEED_FULL][USB_TRANSFER_INTERRUPT] =
    322           &instance->transfers_interrupt;
    323         instance->transfers[USB_SPEED_LOW][USB_TRANSFER_INTERRUPT] =
    324           &instance->transfers_interrupt;
    325         instance->transfers[USB_SPEED_FULL][USB_TRANSFER_CONTROL] =
    326           &instance->transfers_control_full;
    327         instance->transfers[USB_SPEED_LOW][USB_TRANSFER_CONTROL] =
    328           &instance->transfers_control_slow;
    329         instance->transfers[USB_SPEED_FULL][USB_TRANSFER_BULK] =
    330           &instance->transfers_bulk_full;
    331 
    332         return EOK;
    333 #undef CHECK_RET_CLEAR_RETURN
    334 }
    335 /*----------------------------------------------------------------------------*/
    336 /** Schedules batch for execution.
    337  *
    338  * @param[in] instance UHCI structure to use.
    339  * @param[in] batch Transfer batch to schedule.
    340  * @return Error code
    341  */
    342 int uhci_schedule(uhci_t *instance, batch_t *batch)
    343 {
    344         assert(instance);
    345         assert(batch);
    346         const int low_speed = (batch->speed == USB_SPEED_LOW);
    347         if (!allowed_usb_packet(
    348             low_speed, batch->transfer_type, batch->max_packet_size)) {
    349                 usb_log_warning(
    350                     "Invalid USB packet specified %s SPEED %d %zu.\n",
    351                     low_speed ? "LOW" : "FULL" , batch->transfer_type,
    352                     batch->max_packet_size);
    353                 return ENOTSUP;
    354         }
    355         /* TODO: check available bandwith here */
    356 
    357         transfer_list_t *list =
    358             instance->transfers[low_speed][batch->transfer_type];
    359         assert(list);
    360         transfer_list_add_batch(list, batch);
    361 
    362         return EOK;
    363 }
    364 /*----------------------------------------------------------------------------*/
    365 /** Takes action based on the interrupt cause.
    366  *
    367  * @param[in] instance UHCI structure to use.
    368  * @param[in] status Value of the stsatus regiser at the time of interrupt.
    369  */
    370 void uhci_interrupt(uhci_t *instance, uint16_t status)
    371 {
    372         assert(instance);
    373         /* TODO: Check interrupt cause here */
    374         transfer_list_remove_finished(&instance->transfers_interrupt);
    375         transfer_list_remove_finished(&instance->transfers_control_slow);
    376         transfer_list_remove_finished(&instance->transfers_control_full);
    377         transfer_list_remove_finished(&instance->transfers_bulk_full);
    378 }
    379 /*----------------------------------------------------------------------------*/
    380 /** Polling function, emulates interrupts.
    381  *
    382  * @param[in] arg UHCI structure to use.
    383  * @return EOK
    384  */
    385 int uhci_interrupt_emulator(void* arg)
    386 {
    387         usb_log_debug("Started interrupt emulator.\n");
    388         uhci_t *instance = (uhci_t*)arg;
    389         assert(instance);
    390 
    391         while (1) {
    392                 uint16_t status = pio_read_16(&instance->registers->usbsts);
    393                 if (status != 0)
    394                         usb_log_debug2("UHCI status: %x.\n", status);
    395                 status |= 1;
    396                 uhci_interrupt(instance, status);
    397                 pio_write_16(&instance->registers->usbsts, 0x1f);
    398                 async_usleep(UHCI_CLEANER_TIMEOUT);
    399         }
    400         return EOK;
    401 }
    402 /*---------------------------------------------------------------------------*/
    403 /** Debug function, checks consistency of memory structures.
    404  *
    405  * @param[in] arg UHCI structure to use.
    406  * @return EOK
    407  */
    408 int uhci_debug_checker(void *arg)
    409 {
    410         uhci_t *instance = (uhci_t*)arg;
    411         assert(instance);
    412 
    413 #define QH(queue) \
    414         instance->transfers_##queue.queue_head
    415 
    416         while (1) {
    417                 const uint16_t cmd = pio_read_16(&instance->registers->usbcmd);
    418                 const uint16_t sts = pio_read_16(&instance->registers->usbsts);
    419                 const uint16_t intr =
    420                     pio_read_16(&instance->registers->usbintr);
    421 
    422                 if (((cmd & UHCI_CMD_RUN_STOP) != 1) || (sts != 0)) {
    423                         usb_log_debug2("Command: %X Status: %X Intr: %x\n",
    424                             cmd, sts, intr);
    425                 }
    426 
    427                 uintptr_t frame_list =
    428                     pio_read_32(&instance->registers->flbaseadd) & ~0xfff;
    429                 if (frame_list != addr_to_phys(instance->frame_list)) {
    430                         usb_log_debug("Framelist address: %p vs. %p.\n",
    431                             frame_list, addr_to_phys(instance->frame_list));
    432                 }
    433 
    434                 int frnum = pio_read_16(&instance->registers->frnum) & 0x3ff;
    435                 usb_log_debug2("Framelist item: %d \n", frnum );
    436 
    437                 uintptr_t expected_pa = instance->frame_list[frnum] & (~0xf);
    438                 uintptr_t real_pa = addr_to_phys(QH(interrupt));
    439                 if (expected_pa != real_pa) {
    440                         usb_log_debug("Interrupt QH: %p vs. %p.\n",
    441                             expected_pa, real_pa);
    442                 }
    443 
    444                 expected_pa = QH(interrupt)->next_queue & (~0xf);
    445                 real_pa = addr_to_phys(QH(control_slow));
    446                 if (expected_pa != real_pa) {
    447                         usb_log_debug("Control Slow QH: %p vs. %p.\n",
    448                             expected_pa, real_pa);
    449                 }
    450 
    451                 expected_pa = QH(control_slow)->next_queue & (~0xf);
    452                 real_pa = addr_to_phys(QH(control_full));
    453                 if (expected_pa != real_pa) {
    454                         usb_log_debug("Control Full QH: %p vs. %p.\n",
    455                             expected_pa, real_pa);
    456                 }
    457 
    458                 expected_pa = QH(control_full)->next_queue & (~0xf);
    459                 real_pa = addr_to_phys(QH(bulk_full));
    460                 if (expected_pa != real_pa ) {
    461                         usb_log_debug("Bulk QH: %p vs. %p.\n",
    462                             expected_pa, real_pa);
    463                 }
    464                 async_usleep(UHCI_DEBUGER_TIMEOUT);
    465         }
    466         return EOK;
    467 #undef QH
    468 }
    469 /*----------------------------------------------------------------------------*/
    470 /** Checks transfer packets, for USB validity
    471  *
    472  * @param[in] low_speed Transfer speed.
    473  * @param[in] transfer Transer type
    474  * @param[in] size Maximum size of used packets
    475  * @return EOK
    476  */
    477 bool allowed_usb_packet(
    478     bool low_speed, usb_transfer_type_t transfer, size_t size)
    479 {
    480         /* see USB specification chapter 5.5-5.8 for magic numbers used here */
    481         switch(transfer)
    482         {
    483         case USB_TRANSFER_ISOCHRONOUS:
    484                 return (!low_speed && size < 1024);
    485         case USB_TRANSFER_INTERRUPT:
    486                 return size <= (low_speed ? 8 : 64);
    487         case USB_TRANSFER_CONTROL: /* device specifies its own max size */
    488                 return (size <= (low_speed ? 8 : 64));
    489         case USB_TRANSFER_BULK: /* device specifies its own max size */
    490                 return (!low_speed && size <= 64);
    491         }
    492         return false;
     237#undef CHECK_RET_FINI_RETURN
    493238}
    494239/**
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