Satya Durga Srinivasu Prabhala | f38015e | 2013-10-29 13:50:42 -0700 | [diff] [blame] | 1 | /* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 and |
| 5 | * only version 2 as published by the Free Software Foundation. |
| 6 | * |
| 7 | * This program is distributed in the hope that it will be useful, |
| 8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 10 | * GNU General Public License for more details. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/workqueue.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/bitops.h> |
| 17 | #include <linux/wait.h> |
| 18 | #include <linux/sched.h> |
| 19 | #include <linux/notifier.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/cdev.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/err.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/ctype.h> |
| 29 | #include <linux/of_device.h> |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 30 | #include <linux/msm_dsps.h> |
| 31 | #include <linux/uaccess.h> |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 32 | #include <asm/mach-types.h> |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 33 | #include <asm/arch_timer.h> |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 34 | #include <mach/subsystem_restart.h> |
| 35 | #include <mach/ocmem.h> |
| 36 | #include <mach/msm_smd.h> |
| 37 | #include <mach/sensors_adsp.h> |
| 38 | #include <mach/msm_bus.h> |
| 39 | #include <mach/msm_bus_board.h> |
| 40 | |
Jie Cheng | ab0a213 | 2013-11-11 13:40:11 +0800 | [diff] [blame^] | 41 | #define CLASS_NAME "ssc" |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 42 | #define DRV_NAME "sensors" |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 43 | #define DRV_VERSION "1.00" |
| 44 | |
| 45 | #define SNS_OCMEM_SMD_CHANNEL "SENSOR" |
| 46 | #define SNS_OCMEM_CLIENT_ID OCMEM_SENSORS |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 47 | #define SNS_OCMEM_SIZE SZ_256K |
| 48 | #define SMD_BUF_SIZE 1024 |
| 49 | #define SNS_TIMEOUT_MS 1000 |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 50 | |
| 51 | #define SNS_OCMEM_ALLOC_GROW 0x00000001 |
| 52 | #define SNS_OCMEM_ALLOC_SHRINK 0x00000002 |
| 53 | #define SNS_OCMEM_MAP_DONE 0x00000004 |
| 54 | #define SNS_OCMEM_MAP_FAIL 0x00000008 |
| 55 | #define SNS_OCMEM_UNMAP_DONE 0x00000010 |
| 56 | #define SNS_OCMEM_UNMAP_FAIL 0x00000020 |
| 57 | |
| 58 | #define DSPS_HAS_CLIENT 0x00000100 |
| 59 | #define DSPS_HAS_NO_CLIENT 0x00000200 |
| 60 | #define DSPS_BW_VOTE_ON 0x00000400 |
| 61 | #define DSPS_BW_VOTE_OFF 0x00000800 |
| 62 | #define DSPS_PHYS_ADDR_SET 0x00001000 |
| 63 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 64 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 65 | * Structure contains all state used by the sensors driver |
| 66 | */ |
| 67 | struct sns_adsp_control_s { |
| 68 | wait_queue_head_t sns_wait; |
| 69 | spinlock_t sns_lock; |
| 70 | struct workqueue_struct *sns_workqueue; |
| 71 | struct work_struct sns_work; |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 72 | struct workqueue_struct *smd_wq; |
| 73 | struct work_struct smd_read_work; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 74 | smd_channel_t *smd_ch; |
| 75 | uint32_t sns_ocmem_status; |
| 76 | uint32_t mem_segments_size; |
| 77 | struct sns_mem_segment_s_v01 mem_segments[SNS_OCMEM_MAX_NUM_SEG_V01]; |
| 78 | struct ocmem_buf *buf; |
| 79 | struct ocmem_map_list map_list; |
| 80 | struct ocmem_notifier *ocmem_handle; |
| 81 | bool ocmem_enabled; |
| 82 | struct notifier_block ocmem_nb; |
| 83 | uint32_t sns_ocmem_bus_client; |
| 84 | struct platform_device *pdev; |
| 85 | void *pil; |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 86 | struct class *dev_class; |
| 87 | dev_t dev_num; |
| 88 | struct device *dev; |
| 89 | struct cdev *cdev; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | static struct sns_adsp_control_s sns_ctl; |
| 93 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 94 | /* |
| 95 | * All asynchronous responses from the OCMEM driver are received |
| 96 | * by this function |
| 97 | */ |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 98 | int sns_ocmem_drv_cb(struct notifier_block *self, |
| 99 | unsigned long action, |
| 100 | void *dev) |
| 101 | { |
| 102 | unsigned long flags; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 103 | |
| 104 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 105 | |
| 106 | pr_debug("%s: Received OCMEM callback: action=%li\n", |
| 107 | __func__, action); |
| 108 | |
| 109 | switch (action) { |
| 110 | case OCMEM_MAP_DONE: |
| 111 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_MAP_DONE; |
| 112 | sns_ctl.sns_ocmem_status &= (~OCMEM_MAP_FAIL & |
| 113 | ~SNS_OCMEM_UNMAP_DONE & |
| 114 | ~SNS_OCMEM_UNMAP_FAIL); |
| 115 | break; |
| 116 | case OCMEM_MAP_FAIL: |
| 117 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_MAP_FAIL; |
| 118 | sns_ctl.sns_ocmem_status &= (~OCMEM_MAP_DONE & |
| 119 | ~SNS_OCMEM_UNMAP_DONE & |
| 120 | ~SNS_OCMEM_UNMAP_FAIL); |
| 121 | break; |
| 122 | case OCMEM_UNMAP_DONE: |
| 123 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_UNMAP_DONE; |
| 124 | sns_ctl.sns_ocmem_status &= (~SNS_OCMEM_UNMAP_FAIL & |
| 125 | ~SNS_OCMEM_MAP_DONE & |
| 126 | ~OCMEM_MAP_FAIL); |
| 127 | break; |
| 128 | case OCMEM_UNMAP_FAIL: |
| 129 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_UNMAP_FAIL; |
| 130 | sns_ctl.sns_ocmem_status &= (~SNS_OCMEM_UNMAP_DONE & |
| 131 | ~SNS_OCMEM_MAP_DONE & |
| 132 | ~OCMEM_MAP_FAIL); |
| 133 | break; |
| 134 | case OCMEM_ALLOC_GROW: |
| 135 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_ALLOC_GROW; |
| 136 | sns_ctl.sns_ocmem_status &= ~SNS_OCMEM_ALLOC_SHRINK; |
| 137 | break; |
| 138 | case OCMEM_ALLOC_SHRINK: |
| 139 | sns_ctl.sns_ocmem_status |= SNS_OCMEM_ALLOC_SHRINK; |
| 140 | sns_ctl.sns_ocmem_status &= ~SNS_OCMEM_ALLOC_GROW; |
| 141 | break; |
| 142 | default: |
| 143 | pr_err("%s: Unknown action received in OCMEM callback %lu\n", |
| 144 | __func__, action); |
| 145 | break; |
| 146 | } |
| 147 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 148 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 149 | wake_up(&sns_ctl.sns_wait); |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 154 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 155 | * Processes messages received through SMD from the ADSP |
| 156 | * |
| 157 | * @param hdr The message header |
| 158 | * @param msg Message pointer |
| 159 | * |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 160 | */ |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 161 | void sns_ocmem_smd_process(struct sns_ocmem_hdr_s *hdr, void *msg) |
| 162 | { |
| 163 | unsigned long flags; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 164 | |
| 165 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 166 | |
| 167 | pr_debug("%s: Received message from ADSP; id: %i type: %i (%08x)\n", |
| 168 | __func__, hdr->msg_id, hdr->msg_type, |
| 169 | sns_ctl.sns_ocmem_status); |
| 170 | |
| 171 | if (hdr->msg_id == SNS_OCMEM_PHYS_ADDR_RESP_V01 && |
| 172 | hdr->msg_type == SNS_OCMEM_MSG_TYPE_RESP) { |
| 173 | struct sns_ocmem_phys_addr_resp_msg_v01 *msg_ptr = |
| 174 | (struct sns_ocmem_phys_addr_resp_msg_v01 *)msg; |
| 175 | pr_debug("%s: Received SNS_OCMEM_PHYS_ADDR_RESP_V01\n", |
| 176 | __func__); |
| 177 | pr_debug("%s: segments_valid=%d, segments_len=%d\n", __func__, |
| 178 | msg_ptr->segments_valid, msg_ptr->segments_len); |
| 179 | |
| 180 | if (msg_ptr->segments_valid) { |
| 181 | sns_ctl.mem_segments_size = msg_ptr->segments_len; |
| 182 | memcpy(sns_ctl.mem_segments, msg_ptr->segments, |
| 183 | sizeof(struct sns_mem_segment_s_v01) * |
| 184 | msg_ptr->segments_len); |
| 185 | |
| 186 | sns_ctl.sns_ocmem_status |= DSPS_PHYS_ADDR_SET; |
| 187 | } else { |
| 188 | pr_err("%s: Received invalid segment list\n", __func__); |
| 189 | } |
| 190 | } else if (hdr->msg_id == SNS_OCMEM_HAS_CLIENT_IND_V01 && |
| 191 | hdr->msg_type == SNS_OCMEM_MSG_TYPE_IND) { |
| 192 | struct sns_ocmem_has_client_ind_msg_v01 *msg_ptr = |
| 193 | (struct sns_ocmem_has_client_ind_msg_v01 *)msg; |
| 194 | |
| 195 | pr_debug("%s: Received SNS_OCMEM_HAS_CLIENT_IND_V01\n", |
| 196 | __func__); |
| 197 | pr_debug("%s: ADSP has %i client(s)\n", __func__, |
| 198 | msg_ptr->num_clients); |
| 199 | if (msg_ptr->num_clients > 0) { |
| 200 | sns_ctl.sns_ocmem_status |= DSPS_HAS_CLIENT; |
| 201 | sns_ctl.sns_ocmem_status &= ~DSPS_HAS_NO_CLIENT; |
| 202 | } else { |
| 203 | sns_ctl.sns_ocmem_status |= DSPS_HAS_NO_CLIENT; |
| 204 | sns_ctl.sns_ocmem_status &= ~DSPS_HAS_CLIENT; |
| 205 | } |
| 206 | } else if (hdr->msg_id == SNS_OCMEM_BW_VOTE_RESP_V01 && |
| 207 | hdr->msg_type == SNS_OCMEM_MSG_TYPE_RESP) { |
| 208 | /* no need to handle this response msg, just return */ |
| 209 | pr_debug("%s: Received SNS_OCMEM_BW_VOTE_RESP_V01\n", __func__); |
| 210 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
| 211 | return; |
| 212 | } else if (hdr->msg_id == SNS_OCMEM_BW_VOTE_IND_V01 && |
| 213 | hdr->msg_type == SNS_OCMEM_MSG_TYPE_IND) { |
| 214 | struct sns_ocmem_bw_vote_ind_msg_v01 *msg_ptr = |
| 215 | (struct sns_ocmem_bw_vote_ind_msg_v01 *)msg; |
| 216 | pr_debug("%s: Received BW_VOTE_IND_V01, is_vote_on=%d\n", |
| 217 | __func__, msg_ptr->is_vote_on); |
| 218 | |
| 219 | if (msg_ptr->is_vote_on) { |
| 220 | sns_ctl.sns_ocmem_status |= DSPS_BW_VOTE_ON; |
| 221 | sns_ctl.sns_ocmem_status &= ~DSPS_BW_VOTE_OFF; |
| 222 | } else { |
| 223 | sns_ctl.sns_ocmem_status |= DSPS_BW_VOTE_OFF; |
| 224 | sns_ctl.sns_ocmem_status &= ~DSPS_BW_VOTE_ON; |
| 225 | } |
| 226 | } else { |
| 227 | pr_err("%s: Unknown message type received. id: %i; type: %i\n", |
| 228 | __func__, hdr->msg_id, hdr->msg_type); |
| 229 | } |
| 230 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 231 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
| 232 | |
| 233 | wake_up(&sns_ctl.sns_wait); |
| 234 | } |
| 235 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 236 | static void sns_ocmem_smd_read(struct work_struct *ws) |
| 237 | { |
| 238 | struct smd_channel *ch = sns_ctl.smd_ch; |
| 239 | unsigned char *buf = NULL; |
| 240 | int sz, len; |
| 241 | |
| 242 | for (;;) { |
| 243 | sz = smd_cur_packet_size(ch); |
| 244 | BUG_ON(sz > SMD_BUF_SIZE); |
| 245 | len = smd_read_avail(ch); |
| 246 | pr_debug("%s: sz=%d, len=%d\n", __func__, sz, len); |
| 247 | if (len == 0 || len < sz) |
| 248 | break; |
| 249 | buf = kzalloc(SMD_BUF_SIZE, GFP_KERNEL); |
| 250 | if (buf == NULL) { |
| 251 | pr_err("%s: malloc failed", __func__); |
| 252 | break; |
| 253 | } |
| 254 | |
| 255 | if (smd_read(ch, buf, sz) != sz) { |
| 256 | pr_err("%s: not enough data?!\n", __func__); |
| 257 | kfree(buf); |
| 258 | continue; |
| 259 | } |
| 260 | |
| 261 | sns_ocmem_smd_process((struct sns_ocmem_hdr_s *)buf, |
| 262 | (void *)((char *)buf + |
| 263 | sizeof(struct sns_ocmem_hdr_s))); |
| 264 | |
| 265 | kfree(buf); |
| 266 | |
| 267 | } |
| 268 | } |
| 269 | |
| 270 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 271 | * All SMD notifications and messages from Sensors on ADSP are |
| 272 | * received by this function |
| 273 | * |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 274 | */ |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 275 | void sns_ocmem_smd_notify_data(void *data, unsigned int event) |
| 276 | { |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 277 | if (event == SMD_EVENT_DATA) { |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 278 | int sz; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 279 | pr_debug("%s: Received SMD event Data\n", __func__); |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 280 | sz = smd_cur_packet_size(sns_ctl.smd_ch); |
| 281 | if ((sz > 0) && (sz <= smd_read_avail(sns_ctl.smd_ch))) |
| 282 | queue_work(sns_ctl.smd_wq, &sns_ctl.smd_read_work); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 283 | } else if (event == SMD_EVENT_OPEN) { |
| 284 | pr_debug("%s: Received SMD event Open\n", __func__); |
| 285 | } else if (event == SMD_EVENT_CLOSE) { |
| 286 | pr_debug("%s: Received SMD event Close\n", __func__); |
| 287 | } |
| 288 | } |
| 289 | |
| 290 | static bool sns_ocmem_is_status_set(uint32_t sns_ocmem_status) |
| 291 | { |
| 292 | unsigned long flags; |
| 293 | bool is_set; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 294 | |
| 295 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 296 | is_set = sns_ctl.sns_ocmem_status & sns_ocmem_status; |
| 297 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 298 | return is_set; |
| 299 | } |
| 300 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 301 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 302 | * Wait for a response from ADSP or OCMEM Driver, timeout if necessary |
| 303 | * |
| 304 | * @param sns_ocmem_status Status flags to wait for. |
| 305 | * @param timeout_sec Seconds to wait before timeout |
| 306 | * @param timeout_nsec Nanoseconds to wait. Total timeout = nsec + sec |
| 307 | * |
| 308 | * @return 0 If any status flag is set at any time prior to a timeout. |
| 309 | * 0 if success or timedout ; <0 for failures |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 310 | */ |
| 311 | static int sns_ocmem_wait(uint32_t sns_ocmem_status, |
| 312 | uint32_t timeout_ms) |
| 313 | { |
| 314 | int err; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 315 | if (timeout_ms) { |
| 316 | err = wait_event_interruptible_timeout(sns_ctl.sns_wait, |
| 317 | sns_ocmem_is_status_set(sns_ocmem_status), |
| 318 | msecs_to_jiffies(timeout_ms)); |
| 319 | |
| 320 | if (err == 0) |
| 321 | pr_err("%s: interruptible_timeout timeout err=%i\n", |
| 322 | __func__, err); |
| 323 | else if (err < 0) |
| 324 | pr_err("%s: interruptible_timeout failed err=%i\n", |
| 325 | __func__, err); |
| 326 | } else { /* no timeout */ |
| 327 | err = wait_event_interruptible(sns_ctl.sns_wait, |
| 328 | sns_ocmem_is_status_set(sns_ocmem_status)); |
| 329 | if (err < 0) |
| 330 | pr_err("%s: wait_event_interruptible failed err=%i\n", |
| 331 | __func__, err); |
| 332 | } |
| 333 | |
| 334 | return err; |
| 335 | } |
| 336 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 337 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 338 | * Sends a message to the ADSP via SMD. |
| 339 | * |
| 340 | * @param hdr Specifies message type and other meta data |
| 341 | * @param msg_ptr Pointer to the message contents. |
| 342 | * Must be freed within this function if no error is returned. |
| 343 | * |
| 344 | * @return 0 upon success; < 0 upon error |
| 345 | */ |
| 346 | static int |
| 347 | sns_ocmem_send_msg(struct sns_ocmem_hdr_s *hdr, void const *msg_ptr) |
| 348 | { |
| 349 | int rv = 0; |
| 350 | int err = 0; |
| 351 | void *temp = NULL; |
| 352 | int size = sizeof(struct sns_ocmem_hdr_s) + hdr->msg_size; |
| 353 | |
| 354 | temp = kzalloc(sizeof(struct sns_ocmem_hdr_s) + hdr->msg_size, |
| 355 | GFP_KERNEL); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 356 | if (temp == NULL) { |
| 357 | pr_err("%s: allocation failure\n", __func__); |
| 358 | rv = -ENOMEM; |
Satya Durga Srinivasu Prabhala | ebcdc4b | 2013-10-29 14:01:30 -0700 | [diff] [blame] | 359 | goto out; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 360 | } |
| 361 | |
| 362 | hdr->dst_module = SNS_OCMEM_MODULE_ADSP; |
| 363 | hdr->src_module = SNS_OCMEM_MODULE_KERNEL; |
| 364 | |
| 365 | memcpy(temp, hdr, sizeof(struct sns_ocmem_hdr_s)); |
| 366 | memcpy((char *)temp + sizeof(struct sns_ocmem_hdr_s), |
| 367 | msg_ptr, hdr->msg_size); |
| 368 | pr_debug("%s: send msg type: %i size: %i id: %i dst: %i src: %i\n", |
| 369 | __func__, hdr->msg_type, hdr->msg_size, |
| 370 | hdr->msg_id, hdr->dst_module, hdr->src_module); |
| 371 | |
| 372 | if (hdr == NULL) { |
| 373 | pr_err("%s: NULL message header\n", __func__); |
| 374 | rv = -EINVAL; |
| 375 | } else { |
| 376 | if (sns_ctl.smd_ch == NULL) { |
| 377 | pr_err("%s: null smd_ch\n", __func__); |
| 378 | rv = -EINVAL; |
| 379 | } |
| 380 | err = smd_write(sns_ctl.smd_ch, temp, size); |
| 381 | if (err < 0) { |
| 382 | pr_err("%s: smd_write failed %i\n", __func__, err); |
| 383 | rv = -ECOMM; |
| 384 | } else { |
| 385 | pr_debug("%s smd_write successful ret=%d\n", |
| 386 | __func__, err); |
| 387 | } |
| 388 | } |
| 389 | |
| 390 | kfree(temp); |
| 391 | |
Satya Durga Srinivasu Prabhala | ebcdc4b | 2013-10-29 14:01:30 -0700 | [diff] [blame] | 392 | out: |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 393 | return rv; |
| 394 | } |
| 395 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 396 | /* |
| 397 | * Load ADSP Firmware. |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 398 | */ |
| 399 | |
| 400 | static int sns_load_adsp(void) |
| 401 | { |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 402 | sns_ctl.pil = subsystem_get("adsp"); |
| 403 | if (IS_ERR(sns_ctl.pil)) { |
| 404 | pr_err("%s: fail to load ADSP firmware\n", __func__); |
| 405 | return -ENODEV; |
| 406 | } |
| 407 | |
| 408 | pr_debug("%s: Q6/ADSP image is loaded\n", __func__); |
| 409 | |
| 410 | return 0; |
| 411 | } |
| 412 | |
| 413 | static int sns_ocmem_platform_data_populate(struct platform_device *pdev) |
| 414 | { |
| 415 | int ret; |
| 416 | struct msm_bus_scale_pdata *sns_ocmem_bus_scale_pdata = NULL; |
| 417 | struct msm_bus_vectors *sns_ocmem_bus_vectors = NULL; |
| 418 | struct msm_bus_paths *ocmem_sns_bus_paths = NULL; |
| 419 | u32 val; |
| 420 | |
| 421 | if (!pdev->dev.of_node) { |
| 422 | pr_err("%s: device tree information missing\n", __func__); |
| 423 | return -ENODEV; |
| 424 | } |
| 425 | |
| 426 | sns_ocmem_bus_vectors = kzalloc(sizeof(struct msm_bus_vectors), |
| 427 | GFP_KERNEL); |
| 428 | if (!sns_ocmem_bus_vectors) { |
| 429 | dev_err(&pdev->dev, "Failed to allocate memory for platform data\n"); |
| 430 | return -ENOMEM; |
| 431 | } |
| 432 | |
| 433 | ret = of_property_read_u32(pdev->dev.of_node, |
| 434 | "qcom,src-id", &val); |
| 435 | if (ret) { |
| 436 | dev_err(&pdev->dev, "%s: qcom,src-id missing in DT node\n", |
| 437 | __func__); |
| 438 | goto fail1; |
| 439 | } |
| 440 | sns_ocmem_bus_vectors->src = val; |
| 441 | ret = of_property_read_u32(pdev->dev.of_node, |
| 442 | "qcom,dst-id", &val); |
| 443 | if (ret) { |
| 444 | dev_err(&pdev->dev, "%s: qcom,dst-id missing in DT node\n", |
| 445 | __func__); |
| 446 | goto fail1; |
| 447 | } |
| 448 | sns_ocmem_bus_vectors->dst = val; |
| 449 | ret = of_property_read_u32(pdev->dev.of_node, |
| 450 | "qcom,ab", &val); |
| 451 | if (ret) { |
| 452 | dev_err(&pdev->dev, "%s: qcom,ab missing in DT node\n", |
| 453 | __func__); |
| 454 | goto fail1; |
| 455 | } |
| 456 | sns_ocmem_bus_vectors->ab = val; |
| 457 | ret = of_property_read_u32(pdev->dev.of_node, |
| 458 | "qcom,ib", &val); |
| 459 | if (ret) { |
| 460 | dev_err(&pdev->dev, "%s: qcom,ib missing in DT node\n", |
| 461 | __func__); |
| 462 | goto fail1; |
| 463 | } |
| 464 | sns_ocmem_bus_vectors->ib = val; |
| 465 | ocmem_sns_bus_paths = kzalloc(sizeof(struct msm_bus_paths), |
| 466 | GFP_KERNEL); |
| 467 | |
| 468 | if (!ocmem_sns_bus_paths) { |
| 469 | dev_err(&pdev->dev, "Failed to allocate memory for platform data\n"); |
| 470 | goto fail1; |
| 471 | } |
| 472 | ocmem_sns_bus_paths->num_paths = 1; |
| 473 | ocmem_sns_bus_paths->vectors = sns_ocmem_bus_vectors; |
| 474 | |
| 475 | sns_ocmem_bus_scale_pdata = |
| 476 | kzalloc(sizeof(struct msm_bus_scale_pdata), GFP_KERNEL); |
| 477 | if (!sns_ocmem_bus_scale_pdata) { |
| 478 | dev_err(&pdev->dev, "Failed to allocate memory for platform data\n"); |
| 479 | goto fail2; |
| 480 | } |
| 481 | |
| 482 | sns_ocmem_bus_scale_pdata->usecase = ocmem_sns_bus_paths; |
| 483 | sns_ocmem_bus_scale_pdata->num_usecases = 1; |
| 484 | sns_ocmem_bus_scale_pdata->name = "sensors-ocmem"; |
| 485 | |
| 486 | dev_set_drvdata(&pdev->dev, sns_ocmem_bus_scale_pdata); |
| 487 | return ret; |
| 488 | |
| 489 | fail2: |
| 490 | kfree(ocmem_sns_bus_paths); |
| 491 | fail1: |
| 492 | kfree(sns_ocmem_bus_vectors); |
| 493 | return ret; |
| 494 | } |
| 495 | |
| 496 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 497 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 498 | * Initialize all sensors ocmem driver data fields and register with the |
| 499 | * ocmem driver. |
| 500 | * |
| 501 | * @return 0 upon success; < 0 upon error |
| 502 | */ |
| 503 | static int sns_ocmem_init(void) |
| 504 | { |
| 505 | int i, err, ret; |
| 506 | struct sns_ocmem_hdr_s addr_req_hdr; |
| 507 | struct msm_bus_scale_pdata *sns_ocmem_bus_scale_pdata = NULL; |
| 508 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 509 | /* register from OCMEM callack */ |
| 510 | sns_ctl.ocmem_handle = |
| 511 | ocmem_notifier_register(SNS_OCMEM_CLIENT_ID, |
| 512 | &sns_ctl.ocmem_nb); |
| 513 | if (sns_ctl.ocmem_handle == NULL) { |
| 514 | pr_err("OCMEM notifier registration failed\n"); |
| 515 | return -EFAULT; |
| 516 | } |
| 517 | |
| 518 | /* populate platform data */ |
| 519 | ret = sns_ocmem_platform_data_populate(sns_ctl.pdev); |
| 520 | if (ret) { |
| 521 | dev_err(&sns_ctl.pdev->dev, |
| 522 | "%s: failed to populate platform data, rc = %d\n", |
| 523 | __func__, ret); |
| 524 | return -ENODEV; |
| 525 | } |
| 526 | sns_ocmem_bus_scale_pdata = dev_get_drvdata(&sns_ctl.pdev->dev); |
| 527 | |
| 528 | sns_ctl.sns_ocmem_bus_client = |
| 529 | msm_bus_scale_register_client(sns_ocmem_bus_scale_pdata); |
| 530 | |
| 531 | if (!sns_ctl.sns_ocmem_bus_client) { |
| 532 | pr_err("%s: msm_bus_scale_register_client() failed\n", |
| 533 | __func__); |
| 534 | return -EFAULT; |
| 535 | } |
| 536 | |
| 537 | /* load ADSP first */ |
| 538 | if (sns_load_adsp() != 0) { |
| 539 | pr_err("%s: sns_load_adsp failed\n", __func__); |
| 540 | return -EFAULT; |
| 541 | } |
| 542 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 543 | /* |
| 544 | * wait before open SMD channel from kernel to ensure |
| 545 | * channel has been openned already from ADSP side |
| 546 | */ |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 547 | msleep(1000); |
| 548 | |
| 549 | err = smd_named_open_on_edge(SNS_OCMEM_SMD_CHANNEL, |
| 550 | SMD_APPS_QDSP, |
| 551 | &sns_ctl.smd_ch, |
| 552 | NULL, |
| 553 | sns_ocmem_smd_notify_data); |
| 554 | if (err != 0) { |
| 555 | pr_err("%s: smd_named_open_on_edge failed %i\n", __func__, err); |
| 556 | return -EFAULT; |
| 557 | } |
| 558 | |
| 559 | pr_debug("%s: SMD channel openned successfuly!\n", __func__); |
| 560 | /* wait for the channel ready before writing data */ |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 561 | msleep(1000); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 562 | addr_req_hdr.msg_id = SNS_OCMEM_PHYS_ADDR_REQ_V01; |
| 563 | addr_req_hdr.msg_type = SNS_OCMEM_MSG_TYPE_REQ; |
| 564 | addr_req_hdr.msg_size = 0; |
| 565 | |
| 566 | err = sns_ocmem_send_msg(&addr_req_hdr, NULL); |
| 567 | if (err != 0) { |
| 568 | pr_err("%s: sns_ocmem_send_msg failed %i\n", __func__, err); |
| 569 | return -ECOMM; |
| 570 | } |
| 571 | |
| 572 | err = sns_ocmem_wait(DSPS_PHYS_ADDR_SET, 0); |
| 573 | if (err != 0) { |
| 574 | pr_err("%s: sns_ocmem_wait failed %i\n", __func__, err); |
| 575 | return -EFAULT; |
| 576 | } |
| 577 | |
| 578 | sns_ctl.map_list.num_chunks = sns_ctl.mem_segments_size; |
| 579 | for (i = 0; i < sns_ctl.mem_segments_size; i++) { |
| 580 | sns_ctl.map_list.chunks[i].ro = |
| 581 | sns_ctl.mem_segments[i].type == 1 ? true : false; |
| 582 | sns_ctl.map_list.chunks[i].ddr_paddr = |
| 583 | sns_ctl.mem_segments[i].start_address; |
| 584 | sns_ctl.map_list.chunks[i].size = |
| 585 | sns_ctl.mem_segments[i].size; |
| 586 | |
| 587 | pr_debug("%s: chunks[%d]: ro=%d, ddr_paddr=0x%lx, size=%li", |
| 588 | __func__, i, |
| 589 | sns_ctl.map_list.chunks[i].ro, |
| 590 | sns_ctl.map_list.chunks[i].ddr_paddr, |
| 591 | sns_ctl.map_list.chunks[i].size); |
| 592 | } |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 597 | /* |
| 598 | * Unmaps memory in ocmem back to DDR, indicates to the ADSP its completion, |
| 599 | * and waits for it to finish removing its bandwidth vote. |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 600 | */ |
| 601 | static void sns_ocmem_unmap(void) |
| 602 | { |
| 603 | unsigned long flags; |
| 604 | int err = 0; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 605 | |
| 606 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 607 | sns_ctl.buf, OCMEM_ON); |
| 608 | |
| 609 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 610 | sns_ctl.sns_ocmem_status &= (~SNS_OCMEM_UNMAP_FAIL & |
| 611 | ~SNS_OCMEM_UNMAP_DONE); |
| 612 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
| 613 | |
| 614 | err = ocmem_unmap(SNS_OCMEM_CLIENT_ID, |
| 615 | sns_ctl.buf, |
| 616 | &sns_ctl.map_list); |
| 617 | |
| 618 | if (err != 0) { |
| 619 | pr_err("ocmem_unmap failed %i\n", err); |
| 620 | } else { |
| 621 | err = sns_ocmem_wait(SNS_OCMEM_UNMAP_DONE | |
| 622 | SNS_OCMEM_UNMAP_FAIL, 0); |
| 623 | |
| 624 | if (err == 0) { |
| 625 | if (sns_ocmem_is_status_set(SNS_OCMEM_UNMAP_DONE)) |
| 626 | pr_debug("%s: OCMEM_UNMAP_DONE\n", __func__); |
| 627 | else if (sns_ocmem_is_status_set( |
| 628 | SNS_OCMEM_UNMAP_FAIL)) { |
| 629 | pr_err("%s: OCMEM_UNMAP_FAIL\n", __func__); |
| 630 | BUG_ON(true); |
| 631 | } else |
| 632 | pr_err("%s: status flag not set\n", __func__); |
| 633 | } else { |
| 634 | pr_err("%s: sns_ocmem_wait failed %i\n", |
| 635 | __func__, err); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 640 | sns_ctl.buf, OCMEM_OFF); |
| 641 | } |
| 642 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 643 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 644 | * Waits for allocation to succeed. This may take considerable time if the device |
| 645 | * is presently in a high-power use case. |
| 646 | * |
| 647 | * @return 0 on success; < 0 upon error |
| 648 | */ |
| 649 | static int sns_ocmem_wait_for_alloc(void) |
| 650 | { |
| 651 | int err = 0; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 652 | |
| 653 | err = sns_ocmem_wait(SNS_OCMEM_ALLOC_GROW | |
| 654 | DSPS_HAS_NO_CLIENT, 0); |
| 655 | |
| 656 | if (err == 0) { |
| 657 | if (sns_ocmem_is_status_set(DSPS_HAS_NO_CLIENT)) { |
| 658 | pr_debug("%s: Lost client while waiting for GROW\n", |
| 659 | __func__); |
| 660 | ocmem_free(SNS_OCMEM_CLIENT_ID, sns_ctl.buf); |
| 661 | sns_ctl.buf = NULL; |
| 662 | return -EPIPE; |
| 663 | } |
| 664 | } else { |
| 665 | pr_err("sns_ocmem_wait failed %i\n", err); |
| 666 | return -EFAULT; |
| 667 | } |
| 668 | |
| 669 | return 0; |
| 670 | } |
| 671 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 672 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 673 | * Kicks-off the mapping of memory from DDR to ocmem. Waits for the process |
| 674 | * to complete, then indicates so to the ADSP. |
| 675 | * |
| 676 | * @return 0: Success; < 0: Other error |
| 677 | */ |
| 678 | static int sns_ocmem_map(void) |
| 679 | { |
| 680 | int err = 0; |
| 681 | unsigned long flags; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 682 | |
| 683 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 684 | sns_ctl.sns_ocmem_status &= |
| 685 | (~SNS_OCMEM_MAP_FAIL & ~SNS_OCMEM_MAP_DONE); |
| 686 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
| 687 | |
| 688 | /* vote for ocmem bus bandwidth */ |
| 689 | err = msm_bus_scale_client_update_request( |
| 690 | sns_ctl.sns_ocmem_bus_client, |
| 691 | 0); |
| 692 | if (err) |
| 693 | pr_err("%s: failed to vote for bus bandwidth\n", __func__); |
| 694 | |
| 695 | err = ocmem_map(SNS_OCMEM_CLIENT_ID, |
| 696 | sns_ctl.buf, |
| 697 | &sns_ctl.map_list); |
| 698 | |
| 699 | if (err != 0) { |
| 700 | pr_debug("ocmem_map failed %i\n", err); |
| 701 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 702 | sns_ctl.buf, OCMEM_OFF); |
| 703 | ocmem_free(SNS_OCMEM_CLIENT_ID, sns_ctl.buf); |
| 704 | sns_ctl.buf = NULL; |
| 705 | } else { |
| 706 | err = sns_ocmem_wait(SNS_OCMEM_ALLOC_SHRINK | |
| 707 | DSPS_HAS_NO_CLIENT | |
| 708 | SNS_OCMEM_MAP_DONE | |
| 709 | SNS_OCMEM_MAP_FAIL, 0); |
| 710 | |
| 711 | if (err == 0) { |
| 712 | if (sns_ocmem_is_status_set(SNS_OCMEM_MAP_DONE)) |
| 713 | pr_debug("%s: OCMEM mapping DONE\n", __func__); |
| 714 | else if (sns_ocmem_is_status_set(DSPS_HAS_NO_CLIENT)) { |
| 715 | pr_debug("%s: Lost client while waiting for MAP\n", |
| 716 | __func__); |
| 717 | sns_ocmem_unmap(); |
| 718 | ocmem_free(SNS_OCMEM_CLIENT_ID, |
| 719 | sns_ctl.buf); |
| 720 | sns_ctl.buf = NULL; |
| 721 | err = -EPIPE; |
| 722 | } else if (sns_ocmem_is_status_set( |
| 723 | SNS_OCMEM_ALLOC_SHRINK)) { |
| 724 | pr_debug("%s: SHRINK while wait for MAP\n", |
| 725 | __func__); |
| 726 | sns_ocmem_unmap(); |
| 727 | err = ocmem_shrink(SNS_OCMEM_CLIENT_ID, |
| 728 | sns_ctl.buf, 0); |
| 729 | BUG_ON(err != 0); |
| 730 | err = -EFAULT; |
| 731 | } else if (sns_ocmem_is_status_set( |
| 732 | SNS_OCMEM_MAP_FAIL)) { |
| 733 | pr_err("%s: OCMEM mapping fails\n", __func__); |
| 734 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 735 | sns_ctl.buf, |
| 736 | OCMEM_OFF); |
| 737 | ocmem_free(SNS_OCMEM_CLIENT_ID, |
| 738 | sns_ctl.buf); |
| 739 | sns_ctl.buf = NULL; |
| 740 | } else |
| 741 | pr_err("%s: status flag not set\n", __func__); |
| 742 | } else { |
| 743 | pr_err("sns_ocmem_wait failed %i\n", err); |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | return err; |
| 748 | } |
| 749 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 750 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 751 | * Allocates memory in ocmem and maps to it from DDR. |
| 752 | * |
| 753 | * @return 0 upon success; <0 upon failure; |
| 754 | */ |
| 755 | static int sns_ocmem_alloc(void) |
| 756 | { |
| 757 | int err = 0; |
| 758 | unsigned long flags; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 759 | |
| 760 | if (sns_ctl.buf == NULL) { |
| 761 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 762 | sns_ctl.sns_ocmem_status &= ~SNS_OCMEM_ALLOC_GROW & |
| 763 | ~SNS_OCMEM_ALLOC_SHRINK; |
| 764 | spin_unlock_irqrestore(&sns_ctl.sns_lock, flags); |
| 765 | sns_ctl.buf = ocmem_allocate_nb(SNS_OCMEM_CLIENT_ID, |
| 766 | SNS_OCMEM_SIZE); |
| 767 | |
| 768 | if (sns_ctl.buf == NULL) { |
| 769 | pr_err("ocmem_allocate_nb returned NULL\n"); |
| 770 | sns_ctl.ocmem_enabled = false; |
| 771 | err = -EFAULT; |
| 772 | } else if (sns_ctl.buf->len != 0 && |
| 773 | SNS_OCMEM_SIZE > sns_ctl.buf->len) { |
| 774 | pr_err("ocmem_allocate_nb: invalid len %li, Req: %i)\n", |
| 775 | sns_ctl.buf->len, SNS_OCMEM_SIZE); |
| 776 | sns_ctl.ocmem_enabled = false; |
| 777 | err = -EFAULT; |
| 778 | } |
| 779 | } |
| 780 | |
| 781 | pr_debug("%s OCMEM buf=%lx, buffer len=%li\n", __func__, |
| 782 | sns_ctl.buf->addr, sns_ctl.buf->len); |
| 783 | |
| 784 | while (sns_ctl.ocmem_enabled) { |
| 785 | if (sns_ctl.buf->len == 0) { |
| 786 | pr_debug("%s: Waiting for memory allocation\n", |
| 787 | __func__); |
| 788 | err = sns_ocmem_wait_for_alloc(); |
| 789 | if (err == -EPIPE) { |
| 790 | pr_debug("%s:Lost client while wait for alloc\n", |
| 791 | __func__); |
| 792 | break; |
| 793 | } else if (err != 0) { |
| 794 | pr_err("sns_ocmem_wait_for_alloc failed %i\n", |
| 795 | err); |
| 796 | break; |
| 797 | } |
| 798 | } |
| 799 | |
| 800 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 801 | sns_ctl.buf, |
| 802 | OCMEM_ON); |
| 803 | |
| 804 | err = sns_ocmem_map(); |
| 805 | |
| 806 | if (err == -EPIPE) { |
| 807 | pr_debug("%s: Lost client while waiting for mapping\n", |
| 808 | __func__); |
| 809 | break; |
| 810 | } else if (err < 0) { |
| 811 | pr_debug("%s: Mapping failed, will try again\n", |
| 812 | __func__); |
| 813 | break; |
| 814 | } else if (err == 0) { |
| 815 | pr_debug("%s: Mapping finished\n", __func__); |
| 816 | break; |
| 817 | } |
| 818 | } |
| 819 | |
| 820 | return err; |
| 821 | } |
| 822 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 823 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 824 | * Indicate to the ADSP that unmapping has completed, and wait for the response |
| 825 | * that its bandwidth vote has been removed. |
| 826 | * |
| 827 | * @return 0 Upon success; < 0 upon error |
| 828 | */ |
| 829 | static int sns_ocmem_unmap_send(void) |
| 830 | { |
| 831 | int err; |
| 832 | struct sns_ocmem_hdr_s msg_hdr; |
| 833 | struct sns_ocmem_bw_vote_req_msg_v01 msg; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 834 | |
| 835 | memset(&msg, 0, sizeof(struct sns_ocmem_bw_vote_req_msg_v01)); |
| 836 | |
| 837 | msg_hdr.msg_id = SNS_OCMEM_BW_VOTE_REQ_V01; |
| 838 | msg_hdr.msg_type = SNS_OCMEM_MSG_TYPE_REQ; |
| 839 | msg_hdr.msg_size = sizeof(struct sns_ocmem_bw_vote_req_msg_v01); |
| 840 | msg.is_map = 0; |
| 841 | msg.vectors_valid = 0; |
| 842 | msg.vectors_len = 0; |
| 843 | |
| 844 | pr_debug("%s: send bw_vote OFF\n", __func__); |
| 845 | err = sns_ocmem_send_msg(&msg_hdr, &msg); |
| 846 | if (err != 0) { |
| 847 | pr_err("%s: sns_ocmem_send_msg failed %i\n", |
| 848 | __func__, err); |
| 849 | } else { |
| 850 | err = sns_ocmem_wait(DSPS_BW_VOTE_OFF, 0); |
| 851 | if (err != 0) |
| 852 | pr_err("%s: sns_ocmem_wait failed %i\n", __func__, err); |
| 853 | } |
| 854 | |
| 855 | return err; |
| 856 | } |
| 857 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 858 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 859 | * Indicate to the ADSP that mapping has completed, and wait for the response |
| 860 | * that its bandwidth vote has been made. |
| 861 | * |
| 862 | * @return 0 Upon success; < 0 upon error |
| 863 | */ |
| 864 | static int sns_ocmem_map_send(void) |
| 865 | { |
| 866 | int err; |
| 867 | struct sns_ocmem_hdr_s msg_hdr; |
| 868 | struct sns_ocmem_bw_vote_req_msg_v01 msg; |
| 869 | struct ocmem_vectors *vectors; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 870 | |
| 871 | memset(&msg, 0, sizeof(struct sns_ocmem_bw_vote_req_msg_v01)); |
| 872 | |
| 873 | msg_hdr.msg_id = SNS_OCMEM_BW_VOTE_REQ_V01; |
| 874 | msg_hdr.msg_type = SNS_OCMEM_MSG_TYPE_REQ; |
| 875 | msg_hdr.msg_size = sizeof(struct sns_ocmem_bw_vote_req_msg_v01); |
| 876 | msg.is_map = 1; |
| 877 | |
| 878 | vectors = ocmem_get_vectors(SNS_OCMEM_CLIENT_ID, sns_ctl.buf); |
| 879 | if ((vectors != NULL)) { |
Satya Durga Srinivasu Prabhala | f38015e | 2013-10-29 13:50:42 -0700 | [diff] [blame] | 880 | memcpy(&msg.vectors, vectors, sizeof(*vectors)); |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 881 | /* TODO: set vectors_len */ |
| 882 | msg.vectors_valid = true; |
| 883 | msg.vectors_len = 0; |
| 884 | } |
| 885 | |
| 886 | pr_debug("%s: send bw_vote ON\n", __func__); |
| 887 | err = sns_ocmem_send_msg(&msg_hdr, &msg); |
| 888 | if (err != 0) { |
| 889 | pr_err("%s: sns_ocmem_send_msg failed %i\n", __func__, err); |
| 890 | } else { |
| 891 | err = sns_ocmem_wait(DSPS_BW_VOTE_ON | |
| 892 | SNS_OCMEM_ALLOC_SHRINK, 0); |
| 893 | if (err != 0) |
| 894 | pr_err("%s: sns_ocmem_wait failed %i\n", __func__, err); |
| 895 | } |
| 896 | |
| 897 | return err; |
| 898 | } |
| 899 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 900 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 901 | * Perform the encessary operations to clean-up OCMEM after being notified that |
| 902 | * there is no longer a client; if sensors was evicted; or if some error |
| 903 | * has occurred. |
| 904 | * |
| 905 | * @param[i] do_free Whether the memory should be freed (true) or if shrink |
| 906 | * should be called instead (false). |
| 907 | */ |
| 908 | static void sns_ocmem_evicted(bool do_free) |
| 909 | { |
| 910 | int err = 0; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 911 | |
| 912 | sns_ocmem_unmap(); |
| 913 | if (do_free) { |
| 914 | ocmem_free(SNS_OCMEM_CLIENT_ID, sns_ctl.buf); |
| 915 | sns_ctl.buf = NULL; |
| 916 | } else { |
| 917 | err = ocmem_shrink(SNS_OCMEM_CLIENT_ID, sns_ctl.buf, 0); |
| 918 | BUG_ON(err != 0); |
| 919 | } |
| 920 | |
| 921 | err = sns_ocmem_unmap_send(); |
| 922 | if (err != 0) |
| 923 | pr_err("sns_ocmem_unmap_send failed %i\n", err); |
| 924 | } |
| 925 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 926 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 927 | * After mapping has completed and the ADSP has reacted appropriately, wait |
| 928 | * for a shrink command or word from the ADSP that it no longer has a client. |
| 929 | * |
| 930 | * @return 0 If no clients; < 0 upon error; |
| 931 | */ |
| 932 | static int sns_ocmem_map_done(void) |
| 933 | { |
| 934 | int err = 0; |
| 935 | unsigned long flags; |
| 936 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 937 | err = sns_ocmem_map_send(); |
| 938 | if (err != 0) { |
| 939 | pr_err("sns_ocmem_map_send failed %i\n", err); |
| 940 | sns_ocmem_evicted(true); |
| 941 | } else { |
| 942 | ocmem_set_power_state(SNS_OCMEM_CLIENT_ID, |
| 943 | sns_ctl.buf, OCMEM_OFF); |
| 944 | |
| 945 | pr_debug("%s: Waiting for shrink or 'no client' updates\n", |
| 946 | __func__); |
| 947 | err = sns_ocmem_wait(DSPS_HAS_NO_CLIENT | |
| 948 | SNS_OCMEM_ALLOC_SHRINK, 0); |
| 949 | if (err == 0) { |
| 950 | if (sns_ocmem_is_status_set(DSPS_HAS_NO_CLIENT)) { |
| 951 | pr_debug("%s: No longer have a client\n", |
| 952 | __func__); |
| 953 | sns_ocmem_evicted(true); |
| 954 | } else if (sns_ocmem_is_status_set( |
| 955 | SNS_OCMEM_ALLOC_SHRINK)) { |
| 956 | pr_debug("%s: Received SHRINK\n", __func__); |
| 957 | sns_ocmem_evicted(false); |
| 958 | |
| 959 | spin_lock_irqsave(&sns_ctl.sns_lock, flags); |
| 960 | sns_ctl.sns_ocmem_status &= |
| 961 | ~SNS_OCMEM_ALLOC_SHRINK; |
| 962 | spin_unlock_irqrestore(&sns_ctl.sns_lock, |
| 963 | flags); |
| 964 | err = -EFAULT; |
| 965 | } |
| 966 | } else { |
| 967 | pr_err("sns_ocmem_wait failed %i\n", err); |
| 968 | } |
| 969 | } |
| 970 | |
| 971 | return err; |
| 972 | } |
| 973 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 974 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 975 | * Main function. |
| 976 | * Initializes sensors ocmem feature, and waits for an ADSP client. |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 977 | */ |
| 978 | static void sns_ocmem_main(struct work_struct *work) |
| 979 | { |
| 980 | int err = 0; |
| 981 | pr_debug("%s\n", __func__); |
| 982 | |
| 983 | err = sns_ocmem_init(); |
| 984 | if (err != 0) { |
| 985 | pr_err("%s: sns_ocmem_init failed %i\n", __func__, err); |
| 986 | return; |
| 987 | } |
| 988 | |
| 989 | while (true) { |
| 990 | pr_debug("%s: Waiting for sensor client\n", __func__); |
| 991 | if (sns_ocmem_is_status_set(DSPS_HAS_CLIENT) || |
| 992 | !sns_ocmem_wait(DSPS_HAS_CLIENT, 0)) { |
| 993 | pr_debug("%s: DSPS_HAS_CLIENT\n", __func__); |
| 994 | |
| 995 | err = sns_ocmem_alloc(); |
| 996 | if (err != 0) { |
| 997 | pr_err("sns_ocmem_alloc failed %i\n", err); |
| 998 | return; |
| 999 | } else { |
| 1000 | err = sns_ocmem_map_done(); |
| 1001 | if (err != 0) { |
| 1002 | pr_err("sns_ocmem_map_done failed %i", |
| 1003 | err); |
| 1004 | return; |
| 1005 | } |
| 1006 | } |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | ocmem_notifier_unregister(sns_ctl.ocmem_handle, |
| 1011 | &sns_ctl.ocmem_nb); |
| 1012 | } |
| 1013 | |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1014 | static int sensors_adsp_open(struct inode *ip, struct file *fp) |
| 1015 | { |
| 1016 | int ret = 0; |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1017 | return ret; |
| 1018 | } |
| 1019 | |
| 1020 | static int sensors_adsp_release(struct inode *inode, struct file *file) |
| 1021 | { |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1022 | return 0; |
| 1023 | } |
| 1024 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1025 | /* |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1026 | * Read QTimer clock ticks and scale down to 32KHz clock as used |
| 1027 | * in DSPS |
| 1028 | */ |
| 1029 | static u32 sns_read_qtimer(void) |
| 1030 | { |
| 1031 | u64 val; |
| 1032 | val = arch_counter_get_cntpct(); |
| 1033 | /* |
| 1034 | * To convert ticks from 19.2 Mhz clock to 32768 Hz clock: |
| 1035 | * x = (value * 32768) / 19200000 |
| 1036 | * This is same as first left shift the value by 4 bits, i.e. mutiply |
| 1037 | * by 16, and then divide by 9375. The latter is preferable since |
| 1038 | * QTimer tick (value) is 56-bit, so (value * 32768) could overflow, |
| 1039 | * while (value * 16) will never do |
| 1040 | */ |
| 1041 | val <<= 4; |
| 1042 | do_div(val, 9375); |
| 1043 | |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1044 | return (u32)val; |
| 1045 | } |
| 1046 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1047 | /* |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1048 | * IO Control - handle commands from client. |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1049 | */ |
| 1050 | static long sensors_adsp_ioctl(struct file *file, |
| 1051 | unsigned int cmd, unsigned long arg) |
| 1052 | { |
| 1053 | int ret = 0; |
| 1054 | u32 val = 0; |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1055 | |
| 1056 | switch (cmd) { |
| 1057 | case DSPS_IOCTL_READ_SLOW_TIMER: |
| 1058 | val = sns_read_qtimer(); |
| 1059 | ret = put_user(val, (u32 __user *) arg); |
| 1060 | break; |
| 1061 | |
| 1062 | default: |
| 1063 | ret = -EINVAL; |
| 1064 | break; |
| 1065 | } |
| 1066 | |
| 1067 | return ret; |
| 1068 | } |
| 1069 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1070 | /* |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1071 | * platform driver |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1072 | */ |
| 1073 | const struct file_operations sensors_adsp_fops = { |
| 1074 | .owner = THIS_MODULE, |
| 1075 | .open = sensors_adsp_open, |
| 1076 | .release = sensors_adsp_release, |
| 1077 | .unlocked_ioctl = sensors_adsp_ioctl, |
| 1078 | }; |
| 1079 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1080 | static int sensors_adsp_probe(struct platform_device *pdev) |
| 1081 | { |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1082 | int ret = 0; |
Jie Cheng | ab0a213 | 2013-11-11 13:40:11 +0800 | [diff] [blame^] | 1083 | sns_ctl.dev_class = class_create(THIS_MODULE, CLASS_NAME); |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1084 | if (sns_ctl.dev_class == NULL) { |
| 1085 | pr_err("%s: class_create fail.\n", __func__); |
| 1086 | goto res_err; |
| 1087 | } |
| 1088 | |
| 1089 | ret = alloc_chrdev_region(&sns_ctl.dev_num, 0, 1, DRV_NAME); |
| 1090 | if (ret) { |
| 1091 | pr_err("%s: alloc_chrdev_region fail.\n", __func__); |
| 1092 | goto alloc_chrdev_region_err; |
| 1093 | } |
| 1094 | |
| 1095 | sns_ctl.dev = device_create(sns_ctl.dev_class, NULL, |
| 1096 | sns_ctl.dev_num, |
| 1097 | &sns_ctl, DRV_NAME); |
| 1098 | if (IS_ERR(sns_ctl.dev)) { |
| 1099 | pr_err("%s: device_create fail.\n", __func__); |
| 1100 | goto device_create_err; |
| 1101 | } |
| 1102 | |
| 1103 | sns_ctl.cdev = cdev_alloc(); |
| 1104 | if (sns_ctl.cdev == NULL) { |
| 1105 | pr_err("%s: cdev_alloc fail.\n", __func__); |
| 1106 | goto cdev_alloc_err; |
| 1107 | } |
| 1108 | cdev_init(sns_ctl.cdev, &sensors_adsp_fops); |
| 1109 | sns_ctl.cdev->owner = THIS_MODULE; |
| 1110 | |
| 1111 | ret = cdev_add(sns_ctl.cdev, sns_ctl.dev_num, 1); |
| 1112 | if (ret) { |
| 1113 | pr_err("%s: cdev_add fail.\n", __func__); |
| 1114 | goto cdev_add_err; |
| 1115 | } |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1116 | |
| 1117 | sns_ctl.sns_workqueue = |
| 1118 | alloc_workqueue("sns_ocmem", WQ_NON_REENTRANT, 0); |
| 1119 | if (!sns_ctl.sns_workqueue) { |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1120 | pr_err("%s: Failed to create work queue\n", |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1121 | __func__); |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1122 | goto cdev_add_err; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1123 | } |
| 1124 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1125 | sns_ctl.smd_wq = |
| 1126 | alloc_workqueue("smd_wq", WQ_NON_REENTRANT, 0); |
| 1127 | if (!sns_ctl.smd_wq) { |
| 1128 | pr_err("%s: Failed to create work queue\n", |
| 1129 | __func__); |
| 1130 | goto cdev_add_err; |
| 1131 | } |
| 1132 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1133 | init_waitqueue_head(&sns_ctl.sns_wait); |
| 1134 | spin_lock_init(&sns_ctl.sns_lock); |
| 1135 | |
| 1136 | sns_ctl.ocmem_handle = NULL; |
| 1137 | sns_ctl.buf = NULL; |
| 1138 | sns_ctl.sns_ocmem_status = 0; |
| 1139 | sns_ctl.ocmem_enabled = true; |
| 1140 | sns_ctl.ocmem_nb.notifier_call = sns_ocmem_drv_cb; |
| 1141 | sns_ctl.smd_ch = NULL; |
| 1142 | sns_ctl.pdev = pdev; |
| 1143 | |
| 1144 | INIT_WORK(&sns_ctl.sns_work, sns_ocmem_main); |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1145 | INIT_WORK(&sns_ctl.smd_read_work, sns_ocmem_smd_read); |
| 1146 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1147 | queue_work(sns_ctl.sns_workqueue, &sns_ctl.sns_work); |
| 1148 | |
| 1149 | return 0; |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1150 | |
| 1151 | cdev_add_err: |
| 1152 | kfree(sns_ctl.cdev); |
| 1153 | cdev_alloc_err: |
| 1154 | device_destroy(sns_ctl.dev_class, sns_ctl.dev_num); |
| 1155 | device_create_err: |
| 1156 | unregister_chrdev_region(sns_ctl.dev_num, 1); |
| 1157 | alloc_chrdev_region_err: |
| 1158 | class_destroy(sns_ctl.dev_class); |
| 1159 | res_err: |
| 1160 | return -ENODEV; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | static int sensors_adsp_remove(struct platform_device *pdev) |
| 1164 | { |
| 1165 | struct msm_bus_scale_pdata *sns_ocmem_bus_scale_pdata = NULL; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1166 | |
| 1167 | sns_ocmem_bus_scale_pdata = (struct msm_bus_scale_pdata *) |
| 1168 | dev_get_drvdata(&pdev->dev); |
| 1169 | |
| 1170 | kfree(sns_ocmem_bus_scale_pdata->usecase->vectors); |
| 1171 | kfree(sns_ocmem_bus_scale_pdata->usecase); |
| 1172 | kfree(sns_ocmem_bus_scale_pdata); |
| 1173 | |
| 1174 | ocmem_notifier_unregister(sns_ctl.ocmem_handle, |
| 1175 | &sns_ctl.ocmem_nb); |
| 1176 | destroy_workqueue(sns_ctl.sns_workqueue); |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1177 | destroy_workqueue(sns_ctl.smd_wq); |
Naveen Ramaraj | 93060a4 | 2012-11-15 23:23:55 -0800 | [diff] [blame] | 1178 | |
| 1179 | cdev_del(sns_ctl.cdev); |
| 1180 | kfree(sns_ctl.cdev); |
| 1181 | sns_ctl.cdev = NULL; |
| 1182 | device_destroy(sns_ctl.dev_class, sns_ctl.dev_num); |
| 1183 | unregister_chrdev_region(sns_ctl.dev_num, 1); |
| 1184 | class_destroy(sns_ctl.dev_class); |
| 1185 | |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | static const struct of_device_id msm_adsp_sensors_dt_match[] = { |
| 1190 | {.compatible = "qcom,msm-adsp-sensors"}, |
| 1191 | {} |
| 1192 | }; |
| 1193 | MODULE_DEVICE_TABLE(of, msm_adsp_sensors_dt_match); |
| 1194 | |
| 1195 | |
| 1196 | static struct platform_driver sensors_adsp_driver = { |
| 1197 | .driver = { |
| 1198 | .name = "sensors-adsp", |
| 1199 | .owner = THIS_MODULE, |
| 1200 | .of_match_table = msm_adsp_sensors_dt_match, |
| 1201 | }, |
| 1202 | .probe = sensors_adsp_probe, |
| 1203 | .remove = sensors_adsp_remove, |
| 1204 | }; |
| 1205 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1206 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1207 | * Module Init. |
| 1208 | */ |
| 1209 | static int sensors_adsp_init(void) |
| 1210 | { |
| 1211 | int rc; |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1212 | pr_debug("%s driver version %s.\n", DRV_NAME, DRV_VERSION); |
| 1213 | |
| 1214 | rc = platform_driver_register(&sensors_adsp_driver); |
| 1215 | |
| 1216 | if (rc) { |
| 1217 | pr_err("%s: Failed to register sensors adsp driver\n", |
| 1218 | __func__); |
| 1219 | return rc; |
| 1220 | } |
| 1221 | |
| 1222 | return 0; |
| 1223 | } |
| 1224 | |
Neeti Desai | a07e87d | 2012-12-18 18:26:31 -0800 | [diff] [blame] | 1225 | /* |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1226 | * Module Exit. |
| 1227 | */ |
| 1228 | static void sensors_adsp_exit(void) |
| 1229 | { |
Naveen Ramaraj | 88f2363 | 2012-10-10 12:23:29 -0700 | [diff] [blame] | 1230 | platform_driver_unregister(&sensors_adsp_driver); |
| 1231 | } |
| 1232 | |
| 1233 | module_init(sensors_adsp_init); |
| 1234 | module_exit(sensors_adsp_exit); |
| 1235 | |
| 1236 | MODULE_LICENSE("GPL v2"); |
| 1237 | MODULE_DESCRIPTION("Sensors ADSP driver"); |