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path: root/drivers/staging/ozwpan/ozcdev.c
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Diffstat (limited to 'drivers/staging/ozwpan/ozcdev.c')
-rw-r--r--drivers/staging/ozwpan/ozcdev.c134
1 files changed, 78 insertions, 56 deletions
diff --git a/drivers/staging/ozwpan/ozcdev.c b/drivers/staging/ozwpan/ozcdev.c
index 374fdc398641..6ccb64fb0786 100644
--- a/drivers/staging/ozwpan/ozcdev.c
+++ b/drivers/staging/ozwpan/ozcdev.c
@@ -11,16 +11,14 @@
#include <linux/etherdevice.h>
#include <linux/poll.h>
#include <linux/sched.h>
-#include "ozconfig.h"
+#include "ozdbg.h"
#include "ozprotocol.h"
-#include "oztrace.h"
#include "ozappif.h"
#include "ozeltbuf.h"
#include "ozpd.h"
#include "ozproto.h"
#include "ozcdev.h"
-/*------------------------------------------------------------------------------
- */
+
#define OZ_RD_BUF_SZ 256
struct oz_cdev {
dev_t devnum;
@@ -40,16 +38,17 @@ struct oz_serial_ctx {
int rd_in;
int rd_out;
};
-/*------------------------------------------------------------------------------
- */
+
static struct oz_cdev g_cdev;
static struct class *g_oz_class;
-/*------------------------------------------------------------------------------
+
+/*
* Context: process and softirq
*/
static struct oz_serial_ctx *oz_cdev_claim_ctx(struct oz_pd *pd)
{
struct oz_serial_ctx *ctx;
+
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
ctx = (struct oz_serial_ctx *)pd->app_ctx[OZ_APPID_SERIAL-1];
if (ctx)
@@ -57,37 +56,40 @@ static struct oz_serial_ctx *oz_cdev_claim_ctx(struct oz_pd *pd)
spin_unlock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
return ctx;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: softirq or process
*/
static void oz_cdev_release_ctx(struct oz_serial_ctx *ctx)
{
if (atomic_dec_and_test(&ctx->ref_count)) {
- oz_trace("Dealloc serial context.\n");
+ oz_dbg(ON, "Dealloc serial context\n");
kfree(ctx);
}
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static int oz_cdev_open(struct inode *inode, struct file *filp)
{
- struct oz_cdev *dev;
- oz_trace("oz_cdev_open()\n");
- oz_trace("major = %d minor = %d\n", imajor(inode), iminor(inode));
- dev = container_of(inode->i_cdev, struct oz_cdev, cdev);
+ struct oz_cdev *dev = container_of(inode->i_cdev, struct oz_cdev, cdev);
+
+ oz_dbg(ON, "major = %d minor = %d\n", imajor(inode), iminor(inode));
+
filp->private_data = dev;
return 0;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static int oz_cdev_release(struct inode *inode, struct file *filp)
{
- oz_trace("oz_cdev_release()\n");
return 0;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static ssize_t oz_cdev_read(struct file *filp, char __user *buf, size_t count,
@@ -139,7 +141,8 @@ out2:
oz_pd_put(pd);
return count;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
@@ -158,7 +161,9 @@ static ssize_t oz_cdev_write(struct file *filp, const char __user *buf,
oz_pd_get(pd);
spin_unlock_bh(&g_cdev.lock);
if (pd == NULL)
- return -1;
+ return -ENXIO;
+ if (!(pd->state & OZ_PD_S_CONNECTED))
+ return -EAGAIN;
eb = &pd->elt_buff;
ei = oz_elt_info_alloc(eb);
if (ei == NULL) {
@@ -196,7 +201,8 @@ out:
oz_pd_put(pd);
return count;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static int oz_set_active_pd(const u8 *addr)
@@ -204,6 +210,7 @@ static int oz_set_active_pd(const u8 *addr)
int rc = 0;
struct oz_pd *pd;
struct oz_pd *old_pd;
+
pd = oz_pd_find(addr);
if (pd) {
spin_lock_bh(&g_cdev.lock);
@@ -229,13 +236,15 @@ static int oz_set_active_pd(const u8 *addr)
}
return rc;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static long oz_cdev_ioctl(struct file *filp, unsigned int cmd,
unsigned long arg)
{
int rc = 0;
+
if (_IOC_TYPE(cmd) != OZ_IOCTL_MAGIC)
return -ENOTTY;
if (_IOC_NR(cmd) > OZ_IOCTL_MAX)
@@ -251,7 +260,7 @@ static long oz_cdev_ioctl(struct file *filp, unsigned int cmd,
switch (cmd) {
case OZ_IOCTL_GET_PD_LIST: {
struct oz_pd_list list;
- oz_trace("OZ_IOCTL_GET_PD_LIST\n");
+ oz_dbg(ON, "OZ_IOCTL_GET_PD_LIST\n");
memset(&list, 0, sizeof(list));
list.count = oz_get_pd_list(list.addr, OZ_MAX_PDS);
if (copy_to_user((void __user *)arg, &list,
@@ -261,7 +270,7 @@ static long oz_cdev_ioctl(struct file *filp, unsigned int cmd,
break;
case OZ_IOCTL_SET_ACTIVE_PD: {
u8 addr[ETH_ALEN];
- oz_trace("OZ_IOCTL_SET_ACTIVE_PD\n");
+ oz_dbg(ON, "OZ_IOCTL_SET_ACTIVE_PD\n");
if (copy_from_user(addr, (void __user *)arg, ETH_ALEN))
return -EFAULT;
rc = oz_set_active_pd(addr);
@@ -269,7 +278,7 @@ static long oz_cdev_ioctl(struct file *filp, unsigned int cmd,
break;
case OZ_IOCTL_GET_ACTIVE_PD: {
u8 addr[ETH_ALEN];
- oz_trace("OZ_IOCTL_GET_ACTIVE_PD\n");
+ oz_dbg(ON, "OZ_IOCTL_GET_ACTIVE_PD\n");
spin_lock_bh(&g_cdev.lock);
memcpy(addr, g_cdev.active_addr, ETH_ALEN);
spin_unlock_bh(&g_cdev.lock);
@@ -295,14 +304,16 @@ static long oz_cdev_ioctl(struct file *filp, unsigned int cmd,
}
return rc;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
static unsigned int oz_cdev_poll(struct file *filp, poll_table *wait)
{
unsigned int ret = 0;
struct oz_cdev *dev = filp->private_data;
- oz_trace("Poll called wait = %p\n", wait);
+
+ oz_dbg(ON, "Poll called wait = %p\n", wait);
spin_lock_bh(&dev->lock);
if (dev->active_pd) {
struct oz_serial_ctx *ctx = oz_cdev_claim_ctx(dev->active_pd);
@@ -317,7 +328,8 @@ static unsigned int oz_cdev_poll(struct file *filp, poll_table *wait)
poll_wait(filp, &dev->rdq, wait);
return ret;
}
-/*------------------------------------------------------------------------------
+
+/*
*/
static const struct file_operations oz_fops = {
.owner = THIS_MODULE,
@@ -328,19 +340,21 @@ static const struct file_operations oz_fops = {
.unlocked_ioctl = oz_cdev_ioctl,
.poll = oz_cdev_poll
};
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
int oz_cdev_register(void)
{
int err;
struct device *dev;
+
memset(&g_cdev, 0, sizeof(g_cdev));
err = alloc_chrdev_region(&g_cdev.devnum, 0, 1, "ozwpan");
if (err < 0)
- goto out3;
- oz_trace("Alloc dev number %d:%d\n", MAJOR(g_cdev.devnum),
- MINOR(g_cdev.devnum));
+ return err;
+ oz_dbg(ON, "Alloc dev number %d:%d\n",
+ MAJOR(g_cdev.devnum), MINOR(g_cdev.devnum));
cdev_init(&g_cdev.cdev, &oz_fops);
g_cdev.cdev.owner = THIS_MODULE;
g_cdev.cdev.ops = &oz_fops;
@@ -348,30 +362,31 @@ int oz_cdev_register(void)
init_waitqueue_head(&g_cdev.rdq);
err = cdev_add(&g_cdev.cdev, g_cdev.devnum, 1);
if (err < 0) {
- oz_trace("Failed to add cdev\n");
- goto out2;
+ oz_dbg(ON, "Failed to add cdev\n");
+ goto unregister;
}
g_oz_class = class_create(THIS_MODULE, "ozmo_wpan");
if (IS_ERR(g_oz_class)) {
- oz_trace("Failed to register ozmo_wpan class\n");
+ oz_dbg(ON, "Failed to register ozmo_wpan class\n");
err = PTR_ERR(g_oz_class);
- goto out1;
+ goto delete;
}
dev = device_create(g_oz_class, NULL, g_cdev.devnum, NULL, "ozwpan");
if (IS_ERR(dev)) {
- oz_trace("Failed to create sysfs entry for cdev\n");
+ oz_dbg(ON, "Failed to create sysfs entry for cdev\n");
err = PTR_ERR(dev);
- goto out1;
+ goto delete;
}
return 0;
-out1:
+
+delete:
cdev_del(&g_cdev.cdev);
-out2:
+unregister:
unregister_chrdev_region(g_cdev.devnum, 1);
-out3:
return err;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
int oz_cdev_deregister(void)
@@ -384,7 +399,8 @@ int oz_cdev_deregister(void)
}
return 0;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
int oz_cdev_init(void)
@@ -392,22 +408,25 @@ int oz_cdev_init(void)
oz_app_enable(OZ_APPID_SERIAL, 1);
return 0;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: process
*/
void oz_cdev_term(void)
{
oz_app_enable(OZ_APPID_SERIAL, 0);
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: softirq-serialized
*/
int oz_cdev_start(struct oz_pd *pd, int resume)
{
struct oz_serial_ctx *ctx;
struct oz_serial_ctx *old_ctx;
+
if (resume) {
- oz_trace("Serial service resumed.\n");
+ oz_dbg(ON, "Serial service resumed\n");
return 0;
}
ctx = kzalloc(sizeof(struct oz_serial_ctx), GFP_ATOMIC);
@@ -429,20 +448,22 @@ int oz_cdev_start(struct oz_pd *pd, int resume)
(memcmp(pd->mac_addr, g_cdev.active_addr, ETH_ALEN) == 0)) {
oz_pd_get(pd);
g_cdev.active_pd = pd;
- oz_trace("Active PD arrived.\n");
+ oz_dbg(ON, "Active PD arrived\n");
}
spin_unlock(&g_cdev.lock);
- oz_trace("Serial service started.\n");
+ oz_dbg(ON, "Serial service started\n");
return 0;
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: softirq or process
*/
void oz_cdev_stop(struct oz_pd *pd, int pause)
{
struct oz_serial_ctx *ctx;
+
if (pause) {
- oz_trace("Serial service paused.\n");
+ oz_dbg(ON, "Serial service paused\n");
return;
}
spin_lock_bh(&pd->app_lock[OZ_APPID_SERIAL-1]);
@@ -459,11 +480,12 @@ void oz_cdev_stop(struct oz_pd *pd, int pause)
spin_unlock(&g_cdev.lock);
if (pd) {
oz_pd_put(pd);
- oz_trace("Active PD departed.\n");
+ oz_dbg(ON, "Active PD departed\n");
}
- oz_trace("Serial service stopped.\n");
+ oz_dbg(ON, "Serial service stopped\n");
}
-/*------------------------------------------------------------------------------
+
+/*
* Context: softirq-serialized
*/
void oz_cdev_rx(struct oz_pd *pd, struct oz_elt *elt)
@@ -478,7 +500,7 @@ void oz_cdev_rx(struct oz_pd *pd, struct oz_elt *elt)
ctx = oz_cdev_claim_ctx(pd);
if (ctx == NULL) {
- oz_trace("Cannot claim serial context.\n");
+ oz_dbg(ON, "Cannot claim serial context\n");
return;
}
@@ -488,8 +510,8 @@ void oz_cdev_rx(struct oz_pd *pd, struct oz_elt *elt)
if (app_hdr->elt_seq_num != 0) {
if (((ctx->rx_seq_num - app_hdr->elt_seq_num) & 0x80) == 0) {
/* Reject duplicate element. */
- oz_trace("Duplicate element:%02x %02x\n",
- app_hdr->elt_seq_num, ctx->rx_seq_num);
+ oz_dbg(ON, "Duplicate element:%02x %02x\n",
+ app_hdr->elt_seq_num, ctx->rx_seq_num);
goto out;
}
}
@@ -502,7 +524,7 @@ void oz_cdev_rx(struct oz_pd *pd, struct oz_elt *elt)
if (space < 0)
space += OZ_RD_BUF_SZ;
if (len > space) {
- oz_trace("Not enough space:%d %d\n", len, space);
+ oz_dbg(ON, "Not enough space:%d %d\n", len, space);
len = space;
}
ix = ctx->rd_in;
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-13 04:30:16 +0300