1 /* arch/arm/mach-msm/smd_qmi.c
3 * QMI Control Driver -- Manages network data connections.
5 * Copyright (C) 2007 Google, Inc.
6 * Author: Brian Swetland <swetland@google.com>
8 * This software is licensed under the terms of the GNU General Public
9 * License version 2, as published by the Free Software Foundation, and
10 * may be copied, distributed, and modified under those terms.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
19 #include <linux/module.h>
21 #include <linux/cdev.h>
22 #include <linux/device.h>
23 #include <linux/sched.h>
24 #include <linux/wait.h>
25 #include <linux/miscdevice.h>
26 #include <linux/workqueue.h>
27 #include <linux/wakelock.h>
29 #include <asm/uaccess.h>
30 #include <mach/msm_smd.h>
37 #define QMI_RESULT_SUCCESS 0x0000
38 #define QMI_RESULT_FAILURE 0x0001
41 unsigned char service;
42 unsigned char client_id;
43 unsigned short txn_id;
49 #define qmi_ctl_client_id 0
51 #define STATE_OFFLINE 0
52 #define STATE_QUERYING 1
53 #define STATE_ONLINE 2
56 struct miscdevice misc;
60 unsigned char ctl_txn_id;
61 unsigned char wds_client_id;
62 unsigned short wds_txn_id;
69 unsigned char addr[4];
70 unsigned char mask[4];
71 unsigned char gateway[4];
72 unsigned char dns1[4];
73 unsigned char dns2[4];
77 struct wake_lock wake_lock;
79 struct work_struct open_work;
80 struct work_struct read_work;
83 static struct qmi_ctxt *qmi_minor_to_ctxt(unsigned n);
85 static void qmi_read_work(struct work_struct *ws);
86 static void qmi_open_work(struct work_struct *work);
88 void qmi_ctxt_init(struct qmi_ctxt *ctxt, unsigned n)
90 mutex_init(&ctxt->lock);
91 INIT_WORK(&ctxt->read_work, qmi_read_work);
92 INIT_WORK(&ctxt->open_work, qmi_open_work);
93 wake_lock_init(&ctxt->wake_lock, WAKE_LOCK_SUSPEND, ctxt->misc.name);
97 ctxt->state = STATE_OFFLINE;
101 static struct workqueue_struct *qmi_wq;
103 static int verbose = 0;
105 /* anyone waiting for a state change waits here */
106 static DECLARE_WAIT_QUEUE_HEAD(qmi_wait_queue);
109 static void qmi_dump_msg(struct qmi_msg *msg, const char *prefix)
118 "qmi: %s: svc=%02x cid=%02x tid=%04x type=%04x size=%04x\n",
119 prefix, msg->service, msg->client_id,
120 msg->txn_id, msg->type, msg->size);
128 n = x[1] | (x[2] << 8);
132 printk(KERN_INFO "qmi: %s: tlv: %02x %04x { ",
137 printk("%02x ", *x++);
142 int qmi_add_tlv(struct qmi_msg *msg,
143 unsigned type, unsigned size, const void *data)
145 unsigned char *x = msg->tlv + msg->size;
151 memcpy(x + 3, data, size);
153 msg->size += (size + 3);
158 /* Extract a tagged item from a qmi message buffer,
159 ** taking care not to overrun the buffer.
161 static int qmi_get_tlv(struct qmi_msg *msg,
162 unsigned type, unsigned size, void *data)
164 unsigned char *x = msg->tlv;
165 unsigned len = msg->size;
171 /* size of this item */
172 n = x[1] | (x[2] << 8);
179 memcpy(data, x + 3, size);
190 static unsigned qmi_get_status(struct qmi_msg *msg, unsigned *error)
192 unsigned short status[2];
193 if (qmi_get_tlv(msg, 0x02, sizeof(status), status)) {
195 return QMI_RESULT_FAILURE;
202 /* 0x01 <qmux-header> <payload> */
203 #define QMUX_HEADER 13
205 /* should be >= HEADER + FOOTER */
206 #define QMUX_OVERHEAD 16
208 static int qmi_send(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
215 qmi_dump_msg(msg, "send");
217 if (msg->service == QMI_CTL) {
218 hlen = QMUX_HEADER - 1;
223 /* QMUX length is total header + total payload - IFC selector */
224 len = hlen + msg->size - 1;
228 data = msg->tlv - hlen;
230 /* prepend encap and qmux header */
231 *data++ = 0x01; /* ifc selector */
236 *data++ = 0x00; /* flags: client */
237 *data++ = msg->service;
238 *data++ = msg->client_id;
241 *data++ = 0x00; /* flags: send */
242 *data++ = msg->txn_id;
243 if (msg->service != QMI_CTL)
244 *data++ = msg->txn_id >> 8;
247 *data++ = msg->type >> 8;
249 *data++ = msg->size >> 8;
251 /* len + 1 takes the interface selector into account */
252 r = smd_write(ctxt->ch, msg->tlv - hlen, len + 1);
261 static void qmi_process_ctl_msg(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
264 if (msg->type == 0x0022) {
266 if (qmi_get_status(msg, &err))
268 if (qmi_get_tlv(msg, 0x01, sizeof(n), n))
270 if (n[0] == QMI_WDS) {
272 "qmi: ctl: wds use client_id 0x%02x\n", n[1]);
273 ctxt->wds_client_id = n[1];
279 static int qmi_network_get_profile(struct qmi_ctxt *ctxt);
281 static void swapaddr(unsigned char *src, unsigned char *dst)
289 static unsigned char zero[4];
290 static void qmi_read_runtime_profile(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
292 unsigned char tmp[4];
295 r = qmi_get_tlv(msg, 0x1e, 4, tmp);
296 swapaddr(r ? zero : tmp, ctxt->addr);
297 r = qmi_get_tlv(msg, 0x21, 4, tmp);
298 swapaddr(r ? zero : tmp, ctxt->mask);
299 r = qmi_get_tlv(msg, 0x20, 4, tmp);
300 swapaddr(r ? zero : tmp, ctxt->gateway);
301 r = qmi_get_tlv(msg, 0x15, 4, tmp);
302 swapaddr(r ? zero : tmp, ctxt->dns1);
303 r = qmi_get_tlv(msg, 0x16, 4, tmp);
304 swapaddr(r ? zero : tmp, ctxt->dns2);
307 static void qmi_process_unicast_wds_msg(struct qmi_ctxt *ctxt,
313 if (qmi_get_status(msg, &err)) {
315 "qmi: wds: network stop failed (%04x)\n", err);
318 "qmi: wds: network stopped\n");
319 ctxt->state = STATE_OFFLINE;
320 ctxt->state_dirty = 1;
324 if (qmi_get_status(msg, &err)) {
326 "qmi: wds: network start failed (%04x)\n", err);
327 } else if (qmi_get_tlv(msg, 0x01, sizeof(ctxt->wds_handle), &ctxt->wds_handle)) {
329 "qmi: wds no handle?\n");
332 "qmi: wds: got handle 0x%08x\n",
337 printk("qmi: got network profile\n");
338 if (ctxt->state == STATE_QUERYING) {
339 qmi_read_runtime_profile(ctxt, msg);
340 ctxt->state = STATE_ONLINE;
341 ctxt->state_dirty = 1;
345 printk(KERN_ERR "qmi: unknown msg type 0x%04x\n", msg->type);
350 static void qmi_process_broadcast_wds_msg(struct qmi_ctxt *ctxt,
353 if (msg->type == 0x0022) {
355 if (qmi_get_tlv(msg, 0x01, sizeof(n), n))
359 printk(KERN_INFO "qmi: wds: DISCONNECTED\n");
360 ctxt->state = STATE_OFFLINE;
361 ctxt->state_dirty = 1;
364 printk(KERN_INFO "qmi: wds: CONNECTED\n");
365 ctxt->state = STATE_QUERYING;
366 ctxt->state_dirty = 1;
367 qmi_network_get_profile(ctxt);
370 printk(KERN_INFO "qmi: wds: SUSPENDED\n");
371 ctxt->state = STATE_OFFLINE;
372 ctxt->state_dirty = 1;
375 printk(KERN_ERR "qmi: unknown bcast msg type 0x%04x\n", msg->type);
379 static void qmi_process_wds_msg(struct qmi_ctxt *ctxt,
382 printk("wds: %04x @ %02x\n", msg->type, msg->client_id);
383 if (msg->client_id == ctxt->wds_client_id) {
384 qmi_process_unicast_wds_msg(ctxt, msg);
385 } else if (msg->client_id == 0xff) {
386 qmi_process_broadcast_wds_msg(ctxt, msg);
389 "qmi_process_wds_msg client id 0x%02x unknown\n",
394 static void qmi_process_qmux(struct qmi_ctxt *ctxt,
395 unsigned char *buf, unsigned sz)
399 /* require a full header */
403 /* require a size that matches the buffer size */
404 if (sz != (buf[0] | (buf[1] << 8)))
407 /* only messages from a service (bit7=1) are allowed */
411 msg.service = buf[3];
412 msg.client_id = buf[4];
414 /* annoyingly, CTL messages have a shorter TID */
424 msg.txn_id = buf[6] | (buf[7] << 8);
429 /* no type and size!? */
434 msg.type = buf[0] | (buf[1] << 8);
435 msg.size = buf[2] | (buf[3] << 8);
441 qmi_dump_msg(&msg, "recv");
443 mutex_lock(&ctxt->lock);
444 switch (msg.service) {
446 qmi_process_ctl_msg(ctxt, &msg);
449 qmi_process_wds_msg(ctxt, &msg);
452 printk(KERN_ERR "qmi: msg from unknown svc 0x%02x\n",
456 mutex_unlock(&ctxt->lock);
458 wake_up(&qmi_wait_queue);
461 #define QMI_MAX_PACKET (256 + QMUX_OVERHEAD)
463 static void qmi_read_work(struct work_struct *ws)
465 struct qmi_ctxt *ctxt = container_of(ws, struct qmi_ctxt, read_work);
466 struct smd_channel *ch = ctxt->ch;
467 unsigned char buf[QMI_MAX_PACKET];
471 sz = smd_cur_packet_size(ch);
474 if (sz < smd_read_avail(ch))
476 if (sz > QMI_MAX_PACKET) {
480 if (smd_read(ch, buf, sz) != sz) {
481 printk(KERN_ERR "qmi: not enough data?!\n");
485 /* interface selector must be 1 */
489 qmi_process_qmux(ctxt, buf + 1, sz - 1);
493 static int qmi_request_wds_cid(struct qmi_ctxt *ctxt);
495 static void qmi_open_work(struct work_struct *ws)
497 struct qmi_ctxt *ctxt = container_of(ws, struct qmi_ctxt, open_work);
498 mutex_lock(&ctxt->lock);
499 qmi_request_wds_cid(ctxt);
500 mutex_unlock(&ctxt->lock);
503 static void qmi_notify(void *priv, unsigned event)
505 struct qmi_ctxt *ctxt = priv;
508 case SMD_EVENT_DATA: {
510 sz = smd_cur_packet_size(ctxt->ch);
511 if ((sz > 0) && (sz <= smd_read_avail(ctxt->ch))) {
512 wake_lock_timeout(&ctxt->wake_lock, HZ / 2);
513 queue_work(qmi_wq, &ctxt->read_work);
518 printk(KERN_INFO "qmi: smd opened\n");
519 queue_work(qmi_wq, &ctxt->open_work);
521 case SMD_EVENT_CLOSE:
522 printk(KERN_INFO "qmi: smd closed\n");
527 static int qmi_request_wds_cid(struct qmi_ctxt *ctxt)
529 unsigned char data[64 + QMUX_OVERHEAD];
533 msg.service = QMI_CTL;
534 msg.client_id = qmi_ctl_client_id;
535 msg.txn_id = ctxt->ctl_txn_id;
538 msg.tlv = data + QMUX_HEADER;
540 ctxt->ctl_txn_id += 2;
543 qmi_add_tlv(&msg, 0x01, 0x01, &n);
545 return qmi_send(ctxt, &msg);
548 static int qmi_network_get_profile(struct qmi_ctxt *ctxt)
550 unsigned char data[96 + QMUX_OVERHEAD];
553 msg.service = QMI_WDS;
554 msg.client_id = ctxt->wds_client_id;
555 msg.txn_id = ctxt->wds_txn_id;
558 msg.tlv = data + QMUX_HEADER;
560 ctxt->wds_txn_id += 2;
562 return qmi_send(ctxt, &msg);
565 static int qmi_network_up(struct qmi_ctxt *ctxt, char *apn)
567 unsigned char data[96 + QMUX_OVERHEAD];
573 for (user = apn; *user; user++) {
579 for (pass = user; *pass; pass++) {
586 for (auth_type = pass; *auth_type; auth_type++) {
587 if (*auth_type == ' ') {
593 msg.service = QMI_WDS;
594 msg.client_id = ctxt->wds_client_id;
595 msg.txn_id = ctxt->wds_txn_id;
598 msg.tlv = data + QMUX_HEADER;
600 ctxt->wds_txn_id += 2;
602 qmi_add_tlv(&msg, 0x14, strlen(apn), apn);
604 qmi_add_tlv(&msg, 0x16, strlen(auth_type), auth_type);
609 qmi_add_tlv(&msg, 0x16, 1, &x);
611 qmi_add_tlv(&msg, 0x17, strlen(user), user);
613 qmi_add_tlv(&msg, 0x18, strlen(pass), pass);
615 return qmi_send(ctxt, &msg);
618 static int qmi_network_down(struct qmi_ctxt *ctxt)
620 unsigned char data[16 + QMUX_OVERHEAD];
623 msg.service = QMI_WDS;
624 msg.client_id = ctxt->wds_client_id;
625 msg.txn_id = ctxt->wds_txn_id;
628 msg.tlv = data + QMUX_HEADER;
630 ctxt->wds_txn_id += 2;
632 qmi_add_tlv(&msg, 0x01, sizeof(ctxt->wds_handle), &ctxt->wds_handle);
634 return qmi_send(ctxt, &msg);
637 static int qmi_print_state(struct qmi_ctxt *ctxt, char *buf, int max)
642 if (ctxt->state == STATE_ONLINE) {
644 } else if (ctxt->state == STATE_OFFLINE) {
650 i = scnprintf(buf, max, "STATE=%s\n", statename);
651 i += scnprintf(buf + i, max - i, "CID=%d\n",ctxt->wds_client_id);
653 if (ctxt->state != STATE_ONLINE){
657 i += scnprintf(buf + i, max - i, "ADDR=%d.%d.%d.%d\n",
658 ctxt->addr[0], ctxt->addr[1], ctxt->addr[2], ctxt->addr[3]);
659 i += scnprintf(buf + i, max - i, "MASK=%d.%d.%d.%d\n",
660 ctxt->mask[0], ctxt->mask[1], ctxt->mask[2], ctxt->mask[3]);
661 i += scnprintf(buf + i, max - i, "GATEWAY=%d.%d.%d.%d\n",
662 ctxt->gateway[0], ctxt->gateway[1], ctxt->gateway[2],
664 i += scnprintf(buf + i, max - i, "DNS1=%d.%d.%d.%d\n",
665 ctxt->dns1[0], ctxt->dns1[1], ctxt->dns1[2], ctxt->dns1[3]);
666 i += scnprintf(buf + i, max - i, "DNS2=%d.%d.%d.%d\n",
667 ctxt->dns2[0], ctxt->dns2[1], ctxt->dns2[2], ctxt->dns2[3]);
672 static ssize_t qmi_read(struct file *fp, char __user *buf,
673 size_t count, loff_t *pos)
675 struct qmi_ctxt *ctxt = fp->private_data;
680 mutex_lock(&ctxt->lock);
682 if (ctxt->state_dirty) {
683 ctxt->state_dirty = 0;
684 len = qmi_print_state(ctxt, msg, 256);
687 mutex_unlock(&ctxt->lock);
688 r = wait_event_interruptible(qmi_wait_queue, ctxt->state_dirty);
691 mutex_lock(&ctxt->lock);
693 mutex_unlock(&ctxt->lock);
698 if (copy_to_user(buf, msg, len))
705 static ssize_t qmi_write(struct file *fp, const char __user *buf,
706 size_t count, loff_t *pos)
708 struct qmi_ctxt *ctxt = fp->private_data;
709 unsigned char cmd[64];
716 len = count > 63 ? 63 : count;
718 if (copy_from_user(cmd, buf, len))
724 if (cmd[len-1] == '\n') {
729 if (!strncmp(cmd, "verbose", 7)) {
731 } else if (!strncmp(cmd, "terse", 5)) {
733 } else if (!strncmp(cmd, "poll", 4)) {
734 ctxt->state_dirty = 1;
735 wake_up(&qmi_wait_queue);
736 } else if (!strncmp(cmd, "down", 4)) {
738 mutex_lock(&ctxt->lock);
739 if (ctxt->wds_busy) {
740 mutex_unlock(&ctxt->lock);
741 r = wait_event_interruptible(qmi_wait_queue, !ctxt->wds_busy);
747 qmi_network_down(ctxt);
748 mutex_unlock(&ctxt->lock);
749 } else if (!strncmp(cmd, "up:", 3)) {
751 mutex_lock(&ctxt->lock);
752 if (ctxt->wds_busy) {
753 mutex_unlock(&ctxt->lock);
754 r = wait_event_interruptible(qmi_wait_queue, !ctxt->wds_busy);
760 qmi_network_up(ctxt, cmd+3);
761 mutex_unlock(&ctxt->lock);
769 static int qmi_open(struct inode *ip, struct file *fp)
771 struct qmi_ctxt *ctxt = qmi_minor_to_ctxt(MINOR(ip->i_rdev));
775 printk(KERN_ERR "unknown qmi misc %d\n", MINOR(ip->i_rdev));
779 fp->private_data = ctxt;
781 mutex_lock(&ctxt->lock);
783 r = smd_open(ctxt->ch_name, &ctxt->ch, ctxt, qmi_notify);
785 wake_up(&qmi_wait_queue);
786 mutex_unlock(&ctxt->lock);
791 static int qmi_release(struct inode *ip, struct file *fp)
796 static struct file_operations qmi_fops = {
797 .owner = THIS_MODULE,
801 .release = qmi_release,
804 static struct qmi_ctxt qmi_device0 = {
805 .ch_name = "SMD_DATA5_CNTL",
807 .minor = MISC_DYNAMIC_MINOR,
812 static struct qmi_ctxt qmi_device1 = {
813 .ch_name = "SMD_DATA6_CNTL",
815 .minor = MISC_DYNAMIC_MINOR,
820 static struct qmi_ctxt qmi_device2 = {
821 .ch_name = "SMD_DATA7_CNTL",
823 .minor = MISC_DYNAMIC_MINOR,
829 static struct qmi_ctxt *qmi_minor_to_ctxt(unsigned n)
831 if (n == qmi_device0.misc.minor)
833 if (n == qmi_device1.misc.minor)
835 if (n == qmi_device2.misc.minor)
840 static int __init qmi_init(void)
844 qmi_wq = create_singlethread_workqueue("qmi");
848 qmi_ctxt_init(&qmi_device0, 0);
849 qmi_ctxt_init(&qmi_device1, 1);
850 qmi_ctxt_init(&qmi_device2, 2);
852 ret = misc_register(&qmi_device0.misc);
854 ret = misc_register(&qmi_device1.misc);
856 ret = misc_register(&qmi_device2.misc);
860 module_init(qmi_init);