Soumya Managoli | 4738693 | 2018-02-23 13:04:52 +0530 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, 2013-2014, 2016, 2018 The Linux Foundation. |
| 2 | * All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/types.h> |
| 17 | #include <linux/uaccess.h> |
| 18 | #include <linux/spinlock.h> |
| 19 | #include <linux/mutex.h> |
| 20 | #include <linux/list.h> |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/wait.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/fs.h> |
| 25 | #include <linux/debugfs.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/clk.h> |
| 29 | #include <soc/qcom/smd.h> |
| 30 | #include <ipc/apr_tal.h> |
| 31 | |
| 32 | static char *svc_names[APR_DEST_MAX][APR_CLIENT_MAX] = { |
| 33 | { |
| 34 | "apr_audio_svc", |
| 35 | "apr_voice_svc", |
| 36 | }, |
| 37 | { |
| 38 | "apr_audio_svc", |
| 39 | "apr_voice_svc", |
| 40 | }, |
| 41 | }; |
| 42 | |
| 43 | struct apr_svc_ch_dev apr_svc_ch[APR_DL_MAX][APR_DEST_MAX][APR_CLIENT_MAX]; |
| 44 | |
| 45 | int __apr_tal_write(struct apr_svc_ch_dev *apr_ch, void *data, |
| 46 | struct apr_pkt_priv *pkt_priv, int len) |
| 47 | { |
| 48 | int w_len; |
| 49 | unsigned long flags; |
| 50 | |
| 51 | spin_lock_irqsave(&apr_ch->w_lock, flags); |
| 52 | if (smd_write_avail(apr_ch->ch) < len) { |
| 53 | spin_unlock_irqrestore(&apr_ch->w_lock, flags); |
| 54 | return -EAGAIN; |
| 55 | } |
| 56 | |
| 57 | w_len = smd_write(apr_ch->ch, data, len); |
| 58 | spin_unlock_irqrestore(&apr_ch->w_lock, flags); |
| 59 | |
| 60 | pr_debug("apr_tal:w_len = %d\n", w_len); |
| 61 | |
| 62 | if (w_len != len) { |
| 63 | pr_err("apr_tal: Error in write\n"); |
| 64 | return -ENETRESET; |
| 65 | } |
| 66 | return w_len; |
| 67 | } |
| 68 | |
| 69 | int apr_tal_write(struct apr_svc_ch_dev *apr_ch, void *data, |
| 70 | struct apr_pkt_priv *pkt_priv, int len) |
| 71 | { |
| 72 | int rc = 0, retries = 0; |
| 73 | |
| 74 | if (!apr_ch->ch) |
| 75 | return -EINVAL; |
| 76 | |
| 77 | do { |
| 78 | if (rc == -EAGAIN) |
| 79 | udelay(50); |
| 80 | |
| 81 | rc = __apr_tal_write(apr_ch, data, pkt_priv, len); |
| 82 | } while (rc == -EAGAIN && retries++ < 300); |
| 83 | |
| 84 | if (rc == -EAGAIN) |
| 85 | pr_err("apr_tal: TIMEOUT for write\n"); |
| 86 | |
| 87 | return rc; |
| 88 | } |
| 89 | |
| 90 | static void apr_tal_notify(void *priv, unsigned int event) |
| 91 | { |
| 92 | struct apr_svc_ch_dev *apr_ch = priv; |
| 93 | int len, r_len, sz; |
| 94 | int pkt_cnt = 0; |
| 95 | unsigned long flags; |
| 96 | |
| 97 | pr_debug("event = %d\n", event); |
| 98 | switch (event) { |
| 99 | case SMD_EVENT_DATA: |
| 100 | pkt_cnt = 0; |
| 101 | spin_lock_irqsave(&apr_ch->lock, flags); |
| 102 | check_pending: |
| 103 | len = smd_read_avail(apr_ch->ch); |
| 104 | if (len < 0) { |
| 105 | pr_err("apr_tal: Invalid Read Event :%d\n", len); |
| 106 | spin_unlock_irqrestore(&apr_ch->lock, flags); |
| 107 | return; |
| 108 | } |
| 109 | sz = smd_cur_packet_size(apr_ch->ch); |
| 110 | if (sz < 0) { |
| 111 | pr_debug("pkt size is zero\n"); |
| 112 | spin_unlock_irqrestore(&apr_ch->lock, flags); |
| 113 | return; |
| 114 | } |
| 115 | if (!len && !sz && !pkt_cnt) |
| 116 | goto check_write_avail; |
| 117 | if (!len) { |
| 118 | pr_debug("len = %d pkt_cnt = %d\n", len, pkt_cnt); |
| 119 | spin_unlock_irqrestore(&apr_ch->lock, flags); |
| 120 | return; |
| 121 | } |
| 122 | r_len = smd_read_from_cb(apr_ch->ch, apr_ch->data, len); |
| 123 | if (len != r_len) { |
| 124 | pr_err("apr_tal: Invalid Read\n"); |
| 125 | spin_unlock_irqrestore(&apr_ch->lock, flags); |
| 126 | return; |
| 127 | } |
| 128 | pkt_cnt++; |
| 129 | pr_debug("%d %d %d\n", len, sz, pkt_cnt); |
| 130 | if (apr_ch->func) |
| 131 | apr_ch->func(apr_ch->data, r_len, apr_ch->priv); |
| 132 | goto check_pending; |
| 133 | check_write_avail: |
| 134 | if (smd_write_avail(apr_ch->ch)) |
| 135 | wake_up(&apr_ch->wait); |
| 136 | spin_unlock_irqrestore(&apr_ch->lock, flags); |
| 137 | break; |
| 138 | case SMD_EVENT_OPEN: |
| 139 | pr_debug("apr_tal: SMD_EVENT_OPEN\n"); |
| 140 | apr_ch->smd_state = 1; |
| 141 | wake_up(&apr_ch->wait); |
| 142 | break; |
| 143 | case SMD_EVENT_CLOSE: |
| 144 | pr_debug("apr_tal: SMD_EVENT_CLOSE\n"); |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | int apr_tal_rx_intents_config(struct apr_svc_ch_dev *apr_ch, |
| 150 | int num_of_intents, uint32_t size) |
| 151 | { |
| 152 | /* Rx intents configuration is required for Glink |
| 153 | * but not for SMD. No-op for this function. |
| 154 | */ |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | struct apr_svc_ch_dev *apr_tal_open(uint32_t clnt, uint32_t dest, |
| 159 | uint32_t dl, apr_svc_cb_fn func, void *priv) |
| 160 | { |
| 161 | int rc; |
| 162 | |
| 163 | if ((clnt >= APR_CLIENT_MAX) || (dest >= APR_DEST_MAX) || |
| 164 | (dl >= APR_DL_MAX)) { |
| 165 | pr_err("apr_tal: Invalid params\n"); |
| 166 | return NULL; |
| 167 | } |
| 168 | |
| 169 | if (apr_svc_ch[dl][dest][clnt].ch) { |
| 170 | pr_err("apr_tal: This channel alreday openend\n"); |
| 171 | return NULL; |
| 172 | } |
| 173 | |
| 174 | mutex_lock(&apr_svc_ch[dl][dest][clnt].m_lock); |
| 175 | if (!apr_svc_ch[dl][dest][clnt].dest_state) { |
| 176 | rc = wait_event_timeout(apr_svc_ch[dl][dest][clnt].dest, |
| 177 | apr_svc_ch[dl][dest][clnt].dest_state, |
| 178 | msecs_to_jiffies(APR_OPEN_TIMEOUT_MS)); |
| 179 | if (rc == 0) { |
| 180 | pr_err("apr_tal:open timeout\n"); |
| 181 | mutex_unlock(&apr_svc_ch[dl][dest][clnt].m_lock); |
| 182 | return NULL; |
| 183 | } |
| 184 | pr_debug("apr_tal:Wakeup done\n"); |
| 185 | apr_svc_ch[dl][dest][clnt].dest_state = 0; |
| 186 | } |
| 187 | rc = smd_named_open_on_edge(svc_names[dest][clnt], dest, |
| 188 | &apr_svc_ch[dl][dest][clnt].ch, |
| 189 | &apr_svc_ch[dl][dest][clnt], |
| 190 | apr_tal_notify); |
| 191 | if (rc < 0) { |
| 192 | pr_err("apr_tal: smd_open failed %s\n", |
| 193 | svc_names[dest][clnt]); |
| 194 | mutex_unlock(&apr_svc_ch[dl][dest][clnt].m_lock); |
| 195 | return NULL; |
| 196 | } |
| 197 | rc = wait_event_timeout(apr_svc_ch[dl][dest][clnt].wait, |
| 198 | (apr_svc_ch[dl][dest][clnt].smd_state == 1), 5 * HZ); |
| 199 | if (rc == 0) { |
| 200 | pr_err("apr_tal:TIMEOUT for OPEN event\n"); |
| 201 | mutex_unlock(&apr_svc_ch[dl][dest][clnt].m_lock); |
| 202 | apr_tal_close(&apr_svc_ch[dl][dest][clnt]); |
| 203 | return NULL; |
| 204 | } |
| 205 | |
| 206 | smd_disable_read_intr(apr_svc_ch[dl][dest][clnt].ch); |
| 207 | |
| 208 | if (!apr_svc_ch[dl][dest][clnt].dest_state) { |
| 209 | apr_svc_ch[dl][dest][clnt].dest_state = 1; |
| 210 | pr_debug("apr_tal:Waiting for apr svc init\n"); |
| 211 | msleep(200); |
| 212 | pr_debug("apr_tal:apr svc init done\n"); |
| 213 | } |
| 214 | apr_svc_ch[dl][dest][clnt].smd_state = 0; |
| 215 | |
| 216 | apr_svc_ch[dl][dest][clnt].func = func; |
| 217 | apr_svc_ch[dl][dest][clnt].priv = priv; |
| 218 | mutex_unlock(&apr_svc_ch[dl][dest][clnt].m_lock); |
| 219 | |
| 220 | return &apr_svc_ch[dl][dest][clnt]; |
| 221 | } |
| 222 | |
| 223 | int apr_tal_close(struct apr_svc_ch_dev *apr_ch) |
| 224 | { |
| 225 | int r; |
| 226 | |
| 227 | if (!apr_ch->ch) |
| 228 | return -EINVAL; |
| 229 | |
| 230 | mutex_lock(&apr_ch->m_lock); |
| 231 | r = smd_close(apr_ch->ch); |
| 232 | apr_ch->ch = NULL; |
| 233 | apr_ch->func = NULL; |
| 234 | apr_ch->priv = NULL; |
| 235 | mutex_unlock(&apr_ch->m_lock); |
| 236 | return r; |
| 237 | } |
| 238 | |
| 239 | static int apr_smd_probe(struct platform_device *pdev) |
| 240 | { |
| 241 | int dest; |
| 242 | int clnt; |
| 243 | |
| 244 | if (pdev->id == APR_DEST_MODEM) { |
| 245 | pr_info("apr_tal:Modem Is Up\n"); |
| 246 | dest = APR_DEST_MODEM; |
| 247 | if (!strcmp(pdev->name, "apr_audio_svc")) |
| 248 | clnt = APR_CLIENT_AUDIO; |
| 249 | else |
| 250 | clnt = APR_CLIENT_VOICE; |
| 251 | apr_svc_ch[APR_DL_SMD][dest][clnt].dest_state = 1; |
| 252 | wake_up(&apr_svc_ch[APR_DL_SMD][dest][clnt].dest); |
| 253 | } else if (pdev->id == APR_DEST_QDSP6) { |
| 254 | pr_info("apr_tal:Q6 Is Up\n"); |
| 255 | dest = APR_DEST_QDSP6; |
| 256 | clnt = APR_CLIENT_AUDIO; |
| 257 | apr_svc_ch[APR_DL_SMD][dest][clnt].dest_state = 1; |
| 258 | wake_up(&apr_svc_ch[APR_DL_SMD][dest][clnt].dest); |
| 259 | } else |
| 260 | pr_err("apr_tal:Invalid Dest Id: %d\n", pdev->id); |
| 261 | |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | static struct platform_driver apr_q6_driver = { |
| 266 | .probe = apr_smd_probe, |
| 267 | .driver = { |
| 268 | .name = "apr_audio_svc", |
| 269 | .owner = THIS_MODULE, |
| 270 | }, |
| 271 | }; |
| 272 | |
| 273 | static struct platform_driver apr_modem_driver = { |
| 274 | .probe = apr_smd_probe, |
| 275 | .driver = { |
| 276 | .name = "apr_voice_svc", |
| 277 | .owner = THIS_MODULE, |
| 278 | }, |
| 279 | }; |
| 280 | |
| 281 | int apr_tal_init(void) |
| 282 | { |
| 283 | int i, j, k; |
| 284 | |
| 285 | for (i = 0; i < APR_DL_MAX; i++) |
| 286 | for (j = 0; j < APR_DEST_MAX; j++) |
| 287 | for (k = 0; k < APR_CLIENT_MAX; k++) { |
| 288 | init_waitqueue_head(&apr_svc_ch[i][j][k].wait); |
| 289 | init_waitqueue_head(&apr_svc_ch[i][j][k].dest); |
| 290 | spin_lock_init(&apr_svc_ch[i][j][k].lock); |
| 291 | spin_lock_init(&apr_svc_ch[i][j][k].w_lock); |
| 292 | mutex_init(&apr_svc_ch[i][j][k].m_lock); |
| 293 | } |
| 294 | platform_driver_register(&apr_q6_driver); |
| 295 | platform_driver_register(&apr_modem_driver); |
| 296 | return 0; |
| 297 | } |