Changes in uspace/lib/drv/generic/remote_usbhid.c [a44424f:9d58539] in mainline
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uspace/lib/drv/generic/remote_usbhid.c (modified) (2 diffs)
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uspace/lib/drv/generic/remote_usbhid.c
ra44424f r9d58539 37 37 #include <assert.h> 38 38 #include <stdio.h> 39 #include <macros.h>40 39 41 40 #include "usbhid_iface.h" 42 41 #include "ddf/driver.h" 43 44 /** IPC methods for USB HID device interface. */45 typedef enum {46 /** Get number of events reported in single burst.47 * Parameters: none48 * Answer:49 * - Size of one report in bytes.50 */51 IPC_M_USBHID_GET_EVENT_LENGTH,52 /** Get single event from the HID device.53 * The word single refers to set of individual events that were54 * available at particular point in time.55 * Parameters:56 * - flags57 * The call is followed by data read expecting two concatenated58 * arrays.59 * Answer:60 * - EOK - events returned61 * - EAGAIN - no event ready (only in non-blocking mode)62 *63 * It is okay if the client requests less data. Extra data must64 * be truncated by the driver.65 *66 * @todo Change this comment.67 */68 IPC_M_USBHID_GET_EVENT,69 70 /** Get the size of the report descriptor from the HID device.71 *72 * Parameters:73 * - none74 * Answer:75 * - EOK - method is implemented (expected always)76 * Parameters of the answer:77 * - Size of the report in bytes.78 */79 IPC_M_USBHID_GET_REPORT_DESCRIPTOR_LENGTH,80 81 /** Get the report descriptor from the HID device.82 *83 * Parameters:84 * - none85 * The call is followed by data read expecting the descriptor itself.86 * Answer:87 * - EOK - report descriptor returned.88 */89 IPC_M_USBHID_GET_REPORT_DESCRIPTOR90 } usbhid_iface_funcs_t;91 92 /** Ask for event array length.93 *94 * @param dev_sess Session to DDF device providing USB HID interface.95 *96 * @return Number of usages returned or negative error code.97 *98 */99 int usbhid_dev_get_event_length(async_sess_t *dev_sess, size_t *size)100 {101 if (!dev_sess)102 return EINVAL;103 104 async_exch_t *exch = async_exchange_begin(dev_sess);105 106 sysarg_t len;107 int rc = async_req_1_1(exch, DEV_IFACE_ID(USBHID_DEV_IFACE),108 IPC_M_USBHID_GET_EVENT_LENGTH, &len);109 110 async_exchange_end(exch);111 112 if (rc == EOK) {113 if (size != NULL)114 *size = (size_t) len;115 }116 117 return rc;118 }119 120 /** Request for next event from HID device.121 *122 * @param[in] dev_sess Session to DDF device providing USB HID interface.123 * @param[out] usage_pages Where to store usage pages.124 * @param[out] usages Where to store usages (actual data).125 * @param[in] usage_count Length of @p usage_pages and @p usages buffer126 * (in items, not bytes).127 * @param[out] actual_usage_count Number of usages actually returned by the128 * device driver.129 * @param[in] flags Flags (see USBHID_IFACE_FLAG_*).130 *131 * @return Error code.132 *133 */134 int usbhid_dev_get_event(async_sess_t *dev_sess, uint8_t *buf,135 size_t size, size_t *actual_size, int *event_nr, unsigned int flags)136 {137 if (!dev_sess)138 return EINVAL;139 140 if (buf == NULL)141 return ENOMEM;142 143 if (size == 0)144 return EINVAL;145 146 size_t buffer_size = size;147 uint8_t *buffer = malloc(buffer_size);148 if (buffer == NULL)149 return ENOMEM;150 151 async_exch_t *exch = async_exchange_begin(dev_sess);152 153 ipc_call_t opening_request_call;154 aid_t opening_request = async_send_2(exch,155 DEV_IFACE_ID(USBHID_DEV_IFACE), IPC_M_USBHID_GET_EVENT,156 flags, &opening_request_call);157 158 if (opening_request == 0) {159 async_exchange_end(exch);160 free(buffer);161 return ENOMEM;162 }163 164 ipc_call_t data_request_call;165 aid_t data_request = async_data_read(exch, buffer, buffer_size,166 &data_request_call);167 168 async_exchange_end(exch);169 170 if (data_request == 0) {171 async_forget(opening_request);172 free(buffer);173 return ENOMEM;174 }175 176 sysarg_t data_request_rc;177 sysarg_t opening_request_rc;178 async_wait_for(data_request, &data_request_rc);179 async_wait_for(opening_request, &opening_request_rc);180 181 if (data_request_rc != EOK) {182 /* Prefer return code of the opening request. */183 if (opening_request_rc != EOK)184 return (int) opening_request_rc;185 else186 return (int) data_request_rc;187 }188 189 if (opening_request_rc != EOK)190 return (int) opening_request_rc;191 192 size_t act_size = IPC_GET_ARG2(data_request_call);193 194 /* Copy the individual items. */195 memcpy(buf, buffer, act_size);196 197 if (actual_size != NULL)198 *actual_size = act_size;199 200 if (event_nr != NULL)201 *event_nr = IPC_GET_ARG1(opening_request_call);202 203 return EOK;204 }205 206 int usbhid_dev_get_report_descriptor_length(async_sess_t *dev_sess,207 size_t *size)208 {209 if (!dev_sess)210 return EINVAL;211 212 async_exch_t *exch = async_exchange_begin(dev_sess);213 214 sysarg_t arg_size;215 int rc = async_req_1_1(exch, DEV_IFACE_ID(USBHID_DEV_IFACE),216 IPC_M_USBHID_GET_REPORT_DESCRIPTOR_LENGTH, &arg_size);217 218 async_exchange_end(exch);219 220 if (rc == EOK) {221 if (size != NULL)222 *size = (size_t) arg_size;223 }224 225 return rc;226 }227 228 int usbhid_dev_get_report_descriptor(async_sess_t *dev_sess, uint8_t *buf,229 size_t size, size_t *actual_size)230 {231 if (!dev_sess)232 return EINVAL;233 234 if (buf == NULL)235 return ENOMEM;236 237 if (size == 0)238 return EINVAL;239 240 async_exch_t *exch = async_exchange_begin(dev_sess);241 242 aid_t opening_request = async_send_1(exch,243 DEV_IFACE_ID(USBHID_DEV_IFACE), IPC_M_USBHID_GET_REPORT_DESCRIPTOR,244 NULL);245 if (opening_request == 0) {246 async_exchange_end(exch);247 return ENOMEM;248 }249 250 ipc_call_t data_request_call;251 aid_t data_request = async_data_read(exch, buf, size,252 &data_request_call);253 254 async_exchange_end(exch);255 256 if (data_request == 0) {257 async_forget(opening_request);258 return ENOMEM;259 }260 261 sysarg_t data_request_rc;262 sysarg_t opening_request_rc;263 async_wait_for(data_request, &data_request_rc);264 async_wait_for(opening_request, &opening_request_rc);265 266 if (data_request_rc != EOK) {267 /* Prefer return code of the opening request. */268 if (opening_request_rc != EOK)269 return (int) opening_request_rc;270 else271 return (int) data_request_rc;272 }273 274 if (opening_request_rc != EOK)275 return (int) opening_request_rc;276 277 size_t act_size = IPC_GET_ARG2(data_request_call);278 279 if (actual_size != NULL)280 *actual_size = act_size;281 282 return EOK;283 }284 42 285 43 static void remote_usbhid_get_event_length(ddf_fun_t *, void *, ipc_callid_t, ipc_call_t *); … … 290 48 291 49 /** Remote USB HID interface operations. */ 292 static const remote_iface_func_ptr_t remote_usbhid_iface_ops [] = { 293 [IPC_M_USBHID_GET_EVENT_LENGTH] = remote_usbhid_get_event_length, 294 [IPC_M_USBHID_GET_EVENT] = remote_usbhid_get_event, 295 [IPC_M_USBHID_GET_REPORT_DESCRIPTOR_LENGTH] = 296 remote_usbhid_get_report_descriptor_length, 297 [IPC_M_USBHID_GET_REPORT_DESCRIPTOR] = remote_usbhid_get_report_descriptor 50 static remote_iface_func_ptr_t remote_usbhid_iface_ops [] = { 51 remote_usbhid_get_event_length, 52 remote_usbhid_get_event, 53 remote_usbhid_get_report_descriptor_length, 54 remote_usbhid_get_report_descriptor 298 55 }; 299 56 300 57 /** Remote USB HID interface structure. 301 58 */ 302 const remote_iface_t remote_usbhid_iface = { 303 .method_count = ARRAY_SIZE(remote_usbhid_iface_ops), 59 remote_iface_t remote_usbhid_iface = { 60 .method_count = sizeof(remote_usbhid_iface_ops) / 61 sizeof(remote_usbhid_iface_ops[0]), 304 62 .methods = remote_usbhid_iface_ops 305 63 };
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