873 lines
18 KiB
C
873 lines
18 KiB
C
/* arch/arm/mach-msm/smd_qmi.c
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*
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* QMI Control Driver -- Manages network data connections.
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*
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* Copyright (C) 2007 Google, Inc.
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* Author: Brian Swetland <swetland@google.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/cdev.h>
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#include <linux/device.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/miscdevice.h>
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#include <linux/workqueue.h>
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#include <linux/wakelock.h>
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#include <asm/uaccess.h>
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#include <mach/msm_smd.h>
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#define QMI_CTL 0x00
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#define QMI_WDS 0x01
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#define QMI_DMS 0x02
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#define QMI_NAS 0x03
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#define QMI_RESULT_SUCCESS 0x0000
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#define QMI_RESULT_FAILURE 0x0001
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struct qmi_msg {
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unsigned char service;
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unsigned char client_id;
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unsigned short txn_id;
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unsigned short type;
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unsigned short size;
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unsigned char *tlv;
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};
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#define qmi_ctl_client_id 0
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#define STATE_OFFLINE 0
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#define STATE_QUERYING 1
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#define STATE_ONLINE 2
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struct qmi_ctxt {
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struct miscdevice misc;
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struct mutex lock;
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unsigned char ctl_txn_id;
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unsigned char wds_client_id;
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unsigned short wds_txn_id;
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unsigned wds_busy;
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unsigned wds_handle;
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unsigned state_dirty;
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unsigned state;
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unsigned char addr[4];
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unsigned char mask[4];
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unsigned char gateway[4];
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unsigned char dns1[4];
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unsigned char dns2[4];
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smd_channel_t *ch;
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const char *ch_name;
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struct wake_lock wake_lock;
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struct work_struct open_work;
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struct work_struct read_work;
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};
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static struct qmi_ctxt *qmi_minor_to_ctxt(unsigned n);
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static void qmi_read_work(struct work_struct *ws);
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static void qmi_open_work(struct work_struct *work);
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void qmi_ctxt_init(struct qmi_ctxt *ctxt, unsigned n)
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{
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mutex_init(&ctxt->lock);
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INIT_WORK(&ctxt->read_work, qmi_read_work);
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INIT_WORK(&ctxt->open_work, qmi_open_work);
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wake_lock_init(&ctxt->wake_lock, WAKE_LOCK_SUSPEND, ctxt->misc.name);
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ctxt->ctl_txn_id = 1;
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ctxt->wds_txn_id = 1;
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ctxt->wds_busy = 1;
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ctxt->state = STATE_OFFLINE;
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}
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static struct workqueue_struct *qmi_wq;
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static int verbose = 0;
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/* anyone waiting for a state change waits here */
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static DECLARE_WAIT_QUEUE_HEAD(qmi_wait_queue);
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static void qmi_dump_msg(struct qmi_msg *msg, const char *prefix)
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{
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unsigned sz, n;
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unsigned char *x;
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if (!verbose)
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return;
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printk(KERN_INFO
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"qmi: %s: svc=%02x cid=%02x tid=%04x type=%04x size=%04x\n",
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prefix, msg->service, msg->client_id,
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msg->txn_id, msg->type, msg->size);
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x = msg->tlv;
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sz = msg->size;
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while (sz >= 3) {
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sz -= 3;
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n = x[1] | (x[2] << 8);
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if (n > sz)
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break;
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printk(KERN_INFO "qmi: %s: tlv: %02x %04x { ",
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prefix, x[0], n);
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x += 3;
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sz -= n;
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while (n-- > 0)
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printk("%02x ", *x++);
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printk("}\n");
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}
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}
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int qmi_add_tlv(struct qmi_msg *msg,
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unsigned type, unsigned size, const void *data)
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{
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unsigned char *x = msg->tlv + msg->size;
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x[0] = type;
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x[1] = size;
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x[2] = size >> 8;
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memcpy(x + 3, data, size);
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msg->size += (size + 3);
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return 0;
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}
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/* Extract a tagged item from a qmi message buffer,
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** taking care not to overrun the buffer.
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*/
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static int qmi_get_tlv(struct qmi_msg *msg,
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unsigned type, unsigned size, void *data)
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{
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unsigned char *x = msg->tlv;
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unsigned len = msg->size;
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unsigned n;
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while (len >= 3) {
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len -= 3;
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/* size of this item */
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n = x[1] | (x[2] << 8);
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if (n > len)
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break;
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if (x[0] == type) {
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if (n != size)
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return -1;
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memcpy(data, x + 3, size);
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return 0;
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}
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x += (n + 3);
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len -= n;
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}
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return -1;
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}
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static unsigned qmi_get_status(struct qmi_msg *msg, unsigned *error)
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{
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unsigned short status[2];
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if (qmi_get_tlv(msg, 0x02, sizeof(status), status)) {
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*error = 0;
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return QMI_RESULT_FAILURE;
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} else {
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*error = status[1];
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return status[0];
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}
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}
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/* 0x01 <qmux-header> <payload> */
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#define QMUX_HEADER 13
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/* should be >= HEADER + FOOTER */
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#define QMUX_OVERHEAD 16
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static int qmi_send(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
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{
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unsigned char *data;
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unsigned hlen;
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unsigned len;
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int r;
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qmi_dump_msg(msg, "send");
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if (msg->service == QMI_CTL) {
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hlen = QMUX_HEADER - 1;
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} else {
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hlen = QMUX_HEADER;
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}
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/* QMUX length is total header + total payload - IFC selector */
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len = hlen + msg->size - 1;
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if (len > 0xffff)
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return -1;
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data = msg->tlv - hlen;
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/* prepend encap and qmux header */
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*data++ = 0x01; /* ifc selector */
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/* qmux header */
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*data++ = len;
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*data++ = len >> 8;
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*data++ = 0x00; /* flags: client */
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*data++ = msg->service;
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*data++ = msg->client_id;
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/* qmi header */
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*data++ = 0x00; /* flags: send */
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*data++ = msg->txn_id;
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if (msg->service != QMI_CTL)
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*data++ = msg->txn_id >> 8;
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*data++ = msg->type;
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*data++ = msg->type >> 8;
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*data++ = msg->size;
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*data++ = msg->size >> 8;
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/* len + 1 takes the interface selector into account */
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r = smd_write(ctxt->ch, msg->tlv - hlen, len + 1);
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if (r != len) {
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return -1;
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} else {
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return 0;
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}
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}
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static void qmi_process_ctl_msg(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
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{
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unsigned err;
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if (msg->type == 0x0022) {
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unsigned char n[2];
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if (qmi_get_status(msg, &err))
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return;
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if (qmi_get_tlv(msg, 0x01, sizeof(n), n))
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return;
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if (n[0] == QMI_WDS) {
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printk(KERN_INFO
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"qmi: ctl: wds use client_id 0x%02x\n", n[1]);
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ctxt->wds_client_id = n[1];
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ctxt->wds_busy = 0;
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}
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}
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}
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static int qmi_network_get_profile(struct qmi_ctxt *ctxt);
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static void swapaddr(unsigned char *src, unsigned char *dst)
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{
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dst[0] = src[3];
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dst[1] = src[2];
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dst[2] = src[1];
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dst[3] = src[0];
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}
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static unsigned char zero[4];
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static void qmi_read_runtime_profile(struct qmi_ctxt *ctxt, struct qmi_msg *msg)
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{
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unsigned char tmp[4];
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unsigned r;
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r = qmi_get_tlv(msg, 0x1e, 4, tmp);
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swapaddr(r ? zero : tmp, ctxt->addr);
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r = qmi_get_tlv(msg, 0x21, 4, tmp);
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swapaddr(r ? zero : tmp, ctxt->mask);
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r = qmi_get_tlv(msg, 0x20, 4, tmp);
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swapaddr(r ? zero : tmp, ctxt->gateway);
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r = qmi_get_tlv(msg, 0x15, 4, tmp);
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swapaddr(r ? zero : tmp, ctxt->dns1);
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r = qmi_get_tlv(msg, 0x16, 4, tmp);
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swapaddr(r ? zero : tmp, ctxt->dns2);
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}
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static void qmi_process_unicast_wds_msg(struct qmi_ctxt *ctxt,
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struct qmi_msg *msg)
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{
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unsigned err;
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switch (msg->type) {
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case 0x0021:
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if (qmi_get_status(msg, &err)) {
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printk(KERN_ERR
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"qmi: wds: network stop failed (%04x)\n", err);
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} else {
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printk(KERN_INFO
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"qmi: wds: network stopped\n");
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ctxt->state = STATE_OFFLINE;
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ctxt->state_dirty = 1;
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}
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break;
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case 0x0020:
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if (qmi_get_status(msg, &err)) {
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printk(KERN_ERR
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"qmi: wds: network start failed (%04x)\n", err);
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if (msg->size == 0x000c && (msg->tlv)[10] == 0x0b) {
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printk(KERN_ERR
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"qmi: wds: pdp activation collided with CCFC\n");
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ctxt->state = STATE_OFFLINE;
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ctxt->state_dirty = 1;
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}
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if (msg->size == 0x000c && (msg->tlv)[10] == 0x0c) {
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printk(KERN_ERR
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"qmi: wds: pdp activation failed. Cause: Operator-determined barring\n");
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ctxt->state = STATE_OFFLINE;
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ctxt->state_dirty = 1;
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}
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} else if (qmi_get_tlv(msg, 0x01, sizeof(ctxt->wds_handle), &ctxt->wds_handle)) {
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printk(KERN_INFO
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"qmi: wds no handle?\n");
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} else {
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printk(KERN_INFO
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"qmi: wds: got handle 0x%08x\n",
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ctxt->wds_handle);
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}
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break;
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case 0x002D:
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printk("qmi: got network profile\n");
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if (ctxt->state == STATE_QUERYING) {
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qmi_read_runtime_profile(ctxt, msg);
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ctxt->state = STATE_ONLINE;
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ctxt->state_dirty = 1;
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}
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break;
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default:
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printk(KERN_ERR "qmi: unknown msg type 0x%04x\n", msg->type);
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}
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ctxt->wds_busy = 0;
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}
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static void qmi_process_broadcast_wds_msg(struct qmi_ctxt *ctxt,
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struct qmi_msg *msg)
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{
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if (msg->type == 0x0022) {
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unsigned char n[2];
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if (qmi_get_tlv(msg, 0x01, sizeof(n), n))
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return;
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switch (n[0]) {
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case 1:
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printk(KERN_INFO "qmi: wds: DISCONNECTED\n");
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ctxt->state = STATE_OFFLINE;
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ctxt->state_dirty = 1;
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break;
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case 2:
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printk(KERN_INFO "qmi: wds: CONNECTED\n");
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ctxt->state = STATE_QUERYING;
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ctxt->state_dirty = 1;
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qmi_network_get_profile(ctxt);
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break;
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case 3:
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printk(KERN_INFO "qmi: wds: SUSPENDED\n");
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ctxt->state = STATE_OFFLINE;
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ctxt->state_dirty = 1;
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}
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} else {
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printk(KERN_ERR "qmi: unknown bcast msg type 0x%04x\n", msg->type);
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}
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}
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static void qmi_process_wds_msg(struct qmi_ctxt *ctxt,
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struct qmi_msg *msg)
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{
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printk("wds: %04x @ %02x\n", msg->type, msg->client_id);
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if (msg->client_id == ctxt->wds_client_id) {
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qmi_process_unicast_wds_msg(ctxt, msg);
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} else if (msg->client_id == 0xff) {
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qmi_process_broadcast_wds_msg(ctxt, msg);
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} else {
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printk(KERN_ERR
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"qmi_process_wds_msg client id 0x%02x unknown\n",
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msg->client_id);
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}
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}
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static void qmi_process_qmux(struct qmi_ctxt *ctxt,
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unsigned char *buf, unsigned sz)
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{
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struct qmi_msg msg;
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/* require a full header */
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if (sz < 5)
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return;
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/* require a size that matches the buffer size */
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if (sz != (buf[0] | (buf[1] << 8)))
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return;
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/* only messages from a service (bit7=1) are allowed */
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if (buf[2] != 0x80)
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return;
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msg.service = buf[3];
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msg.client_id = buf[4];
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/* annoyingly, CTL messages have a shorter TID */
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if (buf[3] == 0) {
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if (sz < 7)
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return;
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msg.txn_id = buf[6];
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buf += 7;
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sz -= 7;
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} else {
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if (sz < 8)
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return;
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msg.txn_id = buf[6] | (buf[7] << 8);
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buf += 8;
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sz -= 8;
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}
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/* no type and size!? */
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if (sz < 4)
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return;
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sz -= 4;
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msg.type = buf[0] | (buf[1] << 8);
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msg.size = buf[2] | (buf[3] << 8);
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msg.tlv = buf + 4;
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if (sz != msg.size)
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return;
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qmi_dump_msg(&msg, "recv");
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mutex_lock(&ctxt->lock);
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switch (msg.service) {
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case QMI_CTL:
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qmi_process_ctl_msg(ctxt, &msg);
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break;
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case QMI_WDS:
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qmi_process_wds_msg(ctxt, &msg);
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break;
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default:
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printk(KERN_ERR "qmi: msg from unknown svc 0x%02x\n",
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msg.service);
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break;
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}
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mutex_unlock(&ctxt->lock);
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wake_up(&qmi_wait_queue);
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}
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#define QMI_MAX_PACKET (256 + QMUX_OVERHEAD)
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static void qmi_read_work(struct work_struct *ws)
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{
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struct qmi_ctxt *ctxt = container_of(ws, struct qmi_ctxt, read_work);
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struct smd_channel *ch = ctxt->ch;
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unsigned char buf[QMI_MAX_PACKET];
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int sz;
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for (;;) {
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sz = smd_cur_packet_size(ch);
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if (sz == 0)
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break;
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if (sz < smd_read_avail(ch))
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break;
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if (sz > QMI_MAX_PACKET) {
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smd_read(ch, 0, sz);
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continue;
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}
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if (smd_read(ch, buf, sz) != sz) {
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printk(KERN_ERR "qmi: not enough data?!\n");
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continue;
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}
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/* interface selector must be 1 */
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if (buf[0] != 0x01)
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continue;
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qmi_process_qmux(ctxt, buf + 1, sz - 1);
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}
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}
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static int qmi_request_wds_cid(struct qmi_ctxt *ctxt);
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static void qmi_open_work(struct work_struct *ws)
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{
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struct qmi_ctxt *ctxt = container_of(ws, struct qmi_ctxt, open_work);
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mutex_lock(&ctxt->lock);
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qmi_request_wds_cid(ctxt);
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mutex_unlock(&ctxt->lock);
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}
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static void qmi_notify(void *priv, unsigned event)
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{
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struct qmi_ctxt *ctxt = priv;
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switch (event) {
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case SMD_EVENT_DATA: {
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int sz;
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sz = smd_cur_packet_size(ctxt->ch);
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if ((sz > 0) && (sz <= smd_read_avail(ctxt->ch))) {
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wake_lock_timeout(&ctxt->wake_lock, HZ / 2);
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queue_work(qmi_wq, &ctxt->read_work);
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}
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break;
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}
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case SMD_EVENT_OPEN:
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printk(KERN_INFO "qmi: smd opened\n");
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queue_work(qmi_wq, &ctxt->open_work);
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break;
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case SMD_EVENT_CLOSE:
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printk(KERN_INFO "qmi: smd closed\n");
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break;
|
|
}
|
|
}
|
|
|
|
static int qmi_request_wds_cid(struct qmi_ctxt *ctxt)
|
|
{
|
|
unsigned char data[64 + QMUX_OVERHEAD];
|
|
struct qmi_msg msg;
|
|
unsigned char n;
|
|
|
|
msg.service = QMI_CTL;
|
|
msg.client_id = qmi_ctl_client_id;
|
|
msg.txn_id = ctxt->ctl_txn_id;
|
|
msg.type = 0x0022;
|
|
msg.size = 0;
|
|
msg.tlv = data + QMUX_HEADER;
|
|
|
|
ctxt->ctl_txn_id += 2;
|
|
|
|
n = QMI_WDS;
|
|
qmi_add_tlv(&msg, 0x01, 0x01, &n);
|
|
|
|
return qmi_send(ctxt, &msg);
|
|
}
|
|
|
|
static int qmi_network_get_profile(struct qmi_ctxt *ctxt)
|
|
{
|
|
unsigned char data[96 + QMUX_OVERHEAD];
|
|
struct qmi_msg msg;
|
|
|
|
msg.service = QMI_WDS;
|
|
msg.client_id = ctxt->wds_client_id;
|
|
msg.txn_id = ctxt->wds_txn_id;
|
|
msg.type = 0x002D;
|
|
msg.size = 0;
|
|
msg.tlv = data + QMUX_HEADER;
|
|
|
|
ctxt->wds_txn_id += 2;
|
|
|
|
return qmi_send(ctxt, &msg);
|
|
}
|
|
|
|
static int qmi_network_up(struct qmi_ctxt *ctxt, char *apn)
|
|
{
|
|
unsigned char data[96 + QMUX_OVERHEAD];
|
|
struct qmi_msg msg;
|
|
char *auth_type;
|
|
char *user;
|
|
char *pass;
|
|
|
|
for (user = apn; *user; user++) {
|
|
if (*user == ' ') {
|
|
*user++ = 0;
|
|
break;
|
|
}
|
|
}
|
|
for (pass = user; *pass; pass++) {
|
|
if (*pass == ' ') {
|
|
*pass++ = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (auth_type = pass; *auth_type; auth_type++) {
|
|
if (*auth_type == ' ') {
|
|
*auth_type++ = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
msg.service = QMI_WDS;
|
|
msg.client_id = ctxt->wds_client_id;
|
|
msg.txn_id = ctxt->wds_txn_id;
|
|
msg.type = 0x0020;
|
|
msg.size = 0;
|
|
msg.tlv = data + QMUX_HEADER;
|
|
|
|
ctxt->wds_txn_id += 2;
|
|
|
|
qmi_add_tlv(&msg, 0x14, strlen(apn), apn);
|
|
if (*auth_type)
|
|
qmi_add_tlv(&msg, 0x16, strlen(auth_type), auth_type);
|
|
if (*user) {
|
|
if (!*auth_type) {
|
|
unsigned char x;
|
|
x = 3;
|
|
qmi_add_tlv(&msg, 0x16, 1, &x);
|
|
}
|
|
qmi_add_tlv(&msg, 0x17, strlen(user), user);
|
|
if (*pass)
|
|
qmi_add_tlv(&msg, 0x18, strlen(pass), pass);
|
|
}
|
|
return qmi_send(ctxt, &msg);
|
|
}
|
|
|
|
static int qmi_network_down(struct qmi_ctxt *ctxt)
|
|
{
|
|
unsigned char data[16 + QMUX_OVERHEAD];
|
|
struct qmi_msg msg;
|
|
|
|
msg.service = QMI_WDS;
|
|
msg.client_id = ctxt->wds_client_id;
|
|
msg.txn_id = ctxt->wds_txn_id;
|
|
msg.type = 0x0021;
|
|
msg.size = 0;
|
|
msg.tlv = data + QMUX_HEADER;
|
|
|
|
ctxt->wds_txn_id += 2;
|
|
|
|
qmi_add_tlv(&msg, 0x01, sizeof(ctxt->wds_handle), &ctxt->wds_handle);
|
|
|
|
return qmi_send(ctxt, &msg);
|
|
}
|
|
|
|
static int qmi_print_state(struct qmi_ctxt *ctxt, char *buf, int max)
|
|
{
|
|
int i;
|
|
char *statename;
|
|
|
|
if (ctxt->state == STATE_ONLINE) {
|
|
statename = "up";
|
|
} else if (ctxt->state == STATE_OFFLINE) {
|
|
statename = "down";
|
|
} else {
|
|
statename = "busy";
|
|
}
|
|
|
|
i = scnprintf(buf, max, "STATE=%s\n", statename);
|
|
i += scnprintf(buf + i, max - i, "CID=%d\n",ctxt->misc.minor);
|
|
|
|
if (ctxt->state != STATE_ONLINE){
|
|
return i;
|
|
}
|
|
|
|
i += scnprintf(buf + i, max - i, "ADDR=%d.%d.%d.%d\n",
|
|
ctxt->addr[0], ctxt->addr[1], ctxt->addr[2], ctxt->addr[3]);
|
|
i += scnprintf(buf + i, max - i, "MASK=%d.%d.%d.%d\n",
|
|
ctxt->mask[0], ctxt->mask[1], ctxt->mask[2], ctxt->mask[3]);
|
|
i += scnprintf(buf + i, max - i, "GATEWAY=%d.%d.%d.%d\n",
|
|
ctxt->gateway[0], ctxt->gateway[1], ctxt->gateway[2],
|
|
ctxt->gateway[3]);
|
|
i += scnprintf(buf + i, max - i, "DNS1=%d.%d.%d.%d\n",
|
|
ctxt->dns1[0], ctxt->dns1[1], ctxt->dns1[2], ctxt->dns1[3]);
|
|
i += scnprintf(buf + i, max - i, "DNS2=%d.%d.%d.%d\n",
|
|
ctxt->dns2[0], ctxt->dns2[1], ctxt->dns2[2], ctxt->dns2[3]);
|
|
|
|
return i;
|
|
}
|
|
|
|
static ssize_t qmi_read(struct file *fp, char __user *buf,
|
|
size_t count, loff_t *pos)
|
|
{
|
|
struct qmi_ctxt *ctxt = fp->private_data;
|
|
char msg[256];
|
|
int len;
|
|
int r;
|
|
|
|
mutex_lock(&ctxt->lock);
|
|
for (;;) {
|
|
if (ctxt->state_dirty) {
|
|
ctxt->state_dirty = 0;
|
|
len = qmi_print_state(ctxt, msg, 256);
|
|
break;
|
|
}
|
|
mutex_unlock(&ctxt->lock);
|
|
r = wait_event_interruptible(qmi_wait_queue, ctxt->state_dirty);
|
|
if (r < 0)
|
|
return r;
|
|
mutex_lock(&ctxt->lock);
|
|
}
|
|
mutex_unlock(&ctxt->lock);
|
|
|
|
if (len > count)
|
|
len = count;
|
|
|
|
if (copy_to_user(buf, msg, len))
|
|
return -EFAULT;
|
|
|
|
return len;
|
|
}
|
|
|
|
|
|
static ssize_t qmi_write(struct file *fp, const char __user *buf,
|
|
size_t count, loff_t *pos)
|
|
{
|
|
struct qmi_ctxt *ctxt = fp->private_data;
|
|
unsigned char cmd[64];
|
|
int len;
|
|
int r;
|
|
|
|
if (count < 1)
|
|
return 0;
|
|
|
|
len = count > 63 ? 63 : count;
|
|
|
|
if (copy_from_user(cmd, buf, len))
|
|
return -EFAULT;
|
|
|
|
cmd[len] = 0;
|
|
|
|
/* lazy */
|
|
if (cmd[len-1] == '\n') {
|
|
cmd[len-1] = 0;
|
|
len--;
|
|
}
|
|
|
|
if (!strncmp(cmd, "verbose", 7)) {
|
|
verbose = 1;
|
|
} else if (!strncmp(cmd, "terse", 5)) {
|
|
verbose = 0;
|
|
} else if (!strncmp(cmd, "poll", 4)) {
|
|
ctxt->state_dirty = 1;
|
|
wake_up(&qmi_wait_queue);
|
|
} else if (!strncmp(cmd, "down", 4)) {
|
|
retry_down:
|
|
mutex_lock(&ctxt->lock);
|
|
if (ctxt->wds_busy) {
|
|
mutex_unlock(&ctxt->lock);
|
|
r = wait_event_interruptible(qmi_wait_queue, !ctxt->wds_busy);
|
|
if (r < 0)
|
|
return r;
|
|
goto retry_down;
|
|
}
|
|
ctxt->wds_busy = 1;
|
|
qmi_network_down(ctxt);
|
|
mutex_unlock(&ctxt->lock);
|
|
} else if (!strncmp(cmd, "up:", 3)) {
|
|
retry_up:
|
|
mutex_lock(&ctxt->lock);
|
|
if (ctxt->wds_busy) {
|
|
mutex_unlock(&ctxt->lock);
|
|
r = wait_event_interruptible(qmi_wait_queue, !ctxt->wds_busy);
|
|
if (r < 0)
|
|
return r;
|
|
goto retry_up;
|
|
}
|
|
ctxt->wds_busy = 1;
|
|
qmi_network_up(ctxt, cmd+3);
|
|
mutex_unlock(&ctxt->lock);
|
|
} else {
|
|
return -EINVAL;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int qmi_open(struct inode *ip, struct file *fp)
|
|
{
|
|
struct qmi_ctxt *ctxt = qmi_minor_to_ctxt(MINOR(ip->i_rdev));
|
|
int r = 0;
|
|
|
|
if (!ctxt) {
|
|
printk(KERN_ERR "unknown qmi misc %d\n", MINOR(ip->i_rdev));
|
|
return -ENODEV;
|
|
}
|
|
|
|
fp->private_data = ctxt;
|
|
|
|
mutex_lock(&ctxt->lock);
|
|
if (ctxt->ch == 0)
|
|
r = smd_open(ctxt->ch_name, &ctxt->ch, ctxt, qmi_notify);
|
|
if (r == 0)
|
|
wake_up(&qmi_wait_queue);
|
|
mutex_unlock(&ctxt->lock);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int qmi_release(struct inode *ip, struct file *fp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct file_operations qmi_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = qmi_read,
|
|
.write = qmi_write,
|
|
.open = qmi_open,
|
|
.release = qmi_release,
|
|
};
|
|
|
|
static struct qmi_ctxt qmi_device0 = {
|
|
.ch_name = "SMD_DATA5_CNTL",
|
|
.misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "qmi0",
|
|
.fops = &qmi_fops,
|
|
}
|
|
};
|
|
static struct qmi_ctxt qmi_device1 = {
|
|
.ch_name = "SMD_DATA6_CNTL",
|
|
.misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "qmi1",
|
|
.fops = &qmi_fops,
|
|
}
|
|
};
|
|
static struct qmi_ctxt qmi_device2 = {
|
|
.ch_name = "SMD_DATA7_CNTL",
|
|
.misc = {
|
|
.minor = MISC_DYNAMIC_MINOR,
|
|
.name = "qmi2",
|
|
.fops = &qmi_fops,
|
|
}
|
|
};
|
|
|
|
static struct qmi_ctxt *qmi_minor_to_ctxt(unsigned n)
|
|
{
|
|
if (n == qmi_device0.misc.minor)
|
|
return &qmi_device0;
|
|
if (n == qmi_device1.misc.minor)
|
|
return &qmi_device1;
|
|
if (n == qmi_device2.misc.minor)
|
|
return &qmi_device2;
|
|
return 0;
|
|
}
|
|
|
|
static int __init qmi_init(void)
|
|
{
|
|
int ret;
|
|
|
|
qmi_wq = create_singlethread_workqueue("qmi");
|
|
if (qmi_wq == 0)
|
|
return -ENOMEM;
|
|
|
|
qmi_ctxt_init(&qmi_device0, 0);
|
|
qmi_ctxt_init(&qmi_device1, 1);
|
|
qmi_ctxt_init(&qmi_device2, 2);
|
|
|
|
ret = misc_register(&qmi_device0.misc);
|
|
if (ret == 0)
|
|
ret = misc_register(&qmi_device1.misc);
|
|
if (ret == 0)
|
|
ret = misc_register(&qmi_device2.misc);
|
|
return ret;
|
|
}
|
|
|
|
module_init(qmi_init);
|