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linux/drivers/media/dvb/siano/smscoreapi.c
Roel Kluin 08b39642b1 V4L/DVB (12441): siano: read buffer overflow 
With mode DEVICE_MODE_RAW_TUNER a read occurs past the end of smscore_fw_lkup[].
Subsequently an attempt is made to load the firmware from the resulting
filename.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-08-13 20:39:14 -03:00

1649 lines
42 KiB
C
Raw Blame History

/*
* Siano core API module
*
* This file contains implementation for the interface to sms core component
*
* author: Uri Shkolnik
*
* Copyright (c), 2005-2008 Siano Mobile Silicon, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
*
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/firmware.h>
#include <linux/wait.h>
#include <asm/byteorder.h>
#include "smscoreapi.h"
#include "sms-cards.h"
#include "smsir.h"
#include "smsendian.h"
static int sms_dbg;
module_param_named(debug, sms_dbg, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (info=1, adv=2 (or-able))");
struct smscore_device_notifyee_t {
struct list_head entry;
hotplug_t hotplug;
};
struct smscore_idlist_t {
struct list_head entry;
int id;
int data_type;
};
struct smscore_client_t {
struct list_head entry;
struct smscore_device_t *coredev;
void *context;
struct list_head idlist;
onresponse_t onresponse_handler;
onremove_t onremove_handler;
};
void smscore_set_board_id(struct smscore_device_t *core, int id)
{
core->board_id = id;
}
int smscore_led_state(struct smscore_device_t *core, int led)
{
if (led >= 0)
core->led_state = led;
return core->led_state;
}
EXPORT_SYMBOL_GPL(smscore_set_board_id);
int smscore_get_board_id(struct smscore_device_t *core)
{
return core->board_id;
}
EXPORT_SYMBOL_GPL(smscore_get_board_id);
struct smscore_registry_entry_t {
struct list_head entry;
char devpath[32];
int mode;
enum sms_device_type_st type;
};
static struct list_head g_smscore_notifyees;
static struct list_head g_smscore_devices;
static struct mutex g_smscore_deviceslock;
static struct list_head g_smscore_registry;
static struct mutex g_smscore_registrylock;
static int default_mode = 4;
module_param(default_mode, int, 0644);
MODULE_PARM_DESC(default_mode, "default firmware id (device mode)");
static struct smscore_registry_entry_t *smscore_find_registry(char *devpath)
{
struct smscore_registry_entry_t *entry;
struct list_head *next;
kmutex_lock(&g_smscore_registrylock);
for (next = g_smscore_registry.next;
next != &g_smscore_registry;
next = next->next) {
entry = (struct smscore_registry_entry_t *) next;
if (!strcmp(entry->devpath, devpath)) {
kmutex_unlock(&g_smscore_registrylock);
return entry;
}
}
entry = (struct smscore_registry_entry_t *)
kmalloc(sizeof(struct smscore_registry_entry_t),
GFP_KERNEL);
if (entry) {
entry->mode = default_mode;
strcpy(entry->devpath, devpath);
list_add(&entry->entry, &g_smscore_registry);
} else
sms_err("failed to create smscore_registry.");
kmutex_unlock(&g_smscore_registrylock);
return entry;
}
int smscore_registry_getmode(char *devpath)
{
struct smscore_registry_entry_t *entry;
entry = smscore_find_registry(devpath);
if (entry)
return entry->mode;
else
sms_err("No registry found.");
return default_mode;
}
EXPORT_SYMBOL_GPL(smscore_registry_getmode);
static enum sms_device_type_st smscore_registry_gettype(char *devpath)
{
struct smscore_registry_entry_t *entry;
entry = smscore_find_registry(devpath);
if (entry)
return entry->type;
else
sms_err("No registry found.");
return -1;
}
void smscore_registry_setmode(char *devpath, int mode)
{
struct smscore_registry_entry_t *entry;
entry = smscore_find_registry(devpath);
if (entry)
entry->mode = mode;
else
sms_err("No registry found.");
}
static void smscore_registry_settype(char *devpath,
enum sms_device_type_st type)
{
struct smscore_registry_entry_t *entry;
entry = smscore_find_registry(devpath);
if (entry)
entry->type = type;
else
sms_err("No registry found.");
}
static void list_add_locked(struct list_head *new, struct list_head *head,
spinlock_t *lock)
{
unsigned long flags;
spin_lock_irqsave(lock, flags);
list_add(new, head);
spin_unlock_irqrestore(lock, flags);
}
/**
* register a client callback that called when device plugged in/unplugged
* NOTE: if devices exist callback is called immediately for each device
*
* @param hotplug callback
*
* @return 0 on success, <0 on error.
*/
int smscore_register_hotplug(hotplug_t hotplug)
{
struct smscore_device_notifyee_t *notifyee;
struct list_head *next, *first;
int rc = 0;
kmutex_lock(&g_smscore_deviceslock);
notifyee = kmalloc(sizeof(struct smscore_device_notifyee_t),
GFP_KERNEL);
if (notifyee) {
/* now notify callback about existing devices */
first = &g_smscore_devices;
for (next = first->next;
next != first && !rc;
next = next->next) {
struct smscore_device_t *coredev =
(struct smscore_device_t *) next;
rc = hotplug(coredev, coredev->device, 1);
}
if (rc >= 0) {
notifyee->hotplug = hotplug;
list_add(&notifyee->entry, &g_smscore_notifyees);
} else
kfree(notifyee);
} else
rc = -ENOMEM;
kmutex_unlock(&g_smscore_deviceslock);
return rc;
}
EXPORT_SYMBOL_GPL(smscore_register_hotplug);
/**
* unregister a client callback that called when device plugged in/unplugged
*
* @param hotplug callback
*
*/
void smscore_unregister_hotplug(hotplug_t hotplug)
{
struct list_head *next, *first;
kmutex_lock(&g_smscore_deviceslock);
first = &g_smscore_notifyees;
for (next = first->next; next != first;) {
struct smscore_device_notifyee_t *notifyee =
(struct smscore_device_notifyee_t *) next;
next = next->next;
if (notifyee->hotplug == hotplug) {
list_del(&notifyee->entry);
kfree(notifyee);
}
}
kmutex_unlock(&g_smscore_deviceslock);
}
EXPORT_SYMBOL_GPL(smscore_unregister_hotplug);
static void smscore_notify_clients(struct smscore_device_t *coredev)
{
struct smscore_client_t *client;
/* the client must call smscore_unregister_client from remove handler */
while (!list_empty(&coredev->clients)) {
client = (struct smscore_client_t *) coredev->clients.next;
client->onremove_handler(client->context);
}
}
static int smscore_notify_callbacks(struct smscore_device_t *coredev,
struct device *device, int arrival)
{
struct list_head *next, *first;
int rc = 0;
/* note: must be called under g_deviceslock */
first = &g_smscore_notifyees;
for (next = first->next; next != first; next = next->next) {
rc = ((struct smscore_device_notifyee_t *) next)->
hotplug(coredev, device, arrival);
if (rc < 0)
break;
}
return rc;
}
static struct
smscore_buffer_t *smscore_createbuffer(u8 *buffer, void *common_buffer,
dma_addr_t common_buffer_phys)
{
struct smscore_buffer_t *cb =
kmalloc(sizeof(struct smscore_buffer_t), GFP_KERNEL);
if (!cb) {
sms_info("kmalloc(...) failed");
return NULL;
}
cb->p = buffer;
cb->offset_in_common = buffer - (u8 *) common_buffer;
cb->phys = common_buffer_phys + cb->offset_in_common;
return cb;
}
/**
* creates coredev object for a device, prepares buffers,
* creates buffer mappings, notifies registered hotplugs about new device.
*
* @param params device pointer to struct with device specific parameters
* and handlers
* @param coredev pointer to a value that receives created coredev object
*
* @return 0 on success, <0 on error.
*/
int smscore_register_device(struct smsdevice_params_t *params,
struct smscore_device_t **coredev)
{
struct smscore_device_t *dev;
u8 *buffer;
dev = kzalloc(sizeof(struct smscore_device_t), GFP_KERNEL);
if (!dev) {
sms_info("kzalloc(...) failed");
return -ENOMEM;
}
/* init list entry so it could be safe in smscore_unregister_device */
INIT_LIST_HEAD(&dev->entry);
/* init queues */
INIT_LIST_HEAD(&dev->clients);
INIT_LIST_HEAD(&dev->buffers);
/* init locks */
spin_lock_init(&dev->clientslock);
spin_lock_init(&dev->bufferslock);
/* init completion events */
init_completion(&dev->version_ex_done);
init_completion(&dev->data_download_done);
init_completion(&dev->trigger_done);
init_completion(&dev->init_device_done);
init_completion(&dev->reload_start_done);
init_completion(&dev->resume_done);
init_completion(&dev->gpio_configuration_done);
init_completion(&dev->gpio_set_level_done);
init_completion(&dev->gpio_get_level_done);
init_completion(&dev->ir_init_done);
/* Buffer management */
init_waitqueue_head(&dev->buffer_mng_waitq);
/* alloc common buffer */
dev->common_buffer_size = params->buffer_size * params->num_buffers;
dev->common_buffer = dma_alloc_coherent(NULL, dev->common_buffer_size,
&dev->common_buffer_phys,
GFP_KERNEL | GFP_DMA);
if (!dev->common_buffer) {
smscore_unregister_device(dev);
return -ENOMEM;
}
/* prepare dma buffers */
for (buffer = dev->common_buffer;
dev->num_buffers < params->num_buffers;
dev->num_buffers++, buffer += params->buffer_size) {
struct smscore_buffer_t *cb =
smscore_createbuffer(buffer, dev->common_buffer,
dev->common_buffer_phys);
if (!cb) {
smscore_unregister_device(dev);
return -ENOMEM;
}
smscore_putbuffer(dev, cb);
}
sms_info("allocated %d buffers", dev->num_buffers);
dev->mode = DEVICE_MODE_NONE;
dev->context = params->context;
dev->device = params->device;
dev->setmode_handler = params->setmode_handler;
dev->detectmode_handler = params->detectmode_handler;
dev->sendrequest_handler = params->sendrequest_handler;
dev->preload_handler = params->preload_handler;
dev->postload_handler = params->postload_handler;
dev->device_flags = params->flags;
strcpy(dev->devpath, params->devpath);
smscore_registry_settype(dev->devpath, params->device_type);
/* add device to devices list */
kmutex_lock(&g_smscore_deviceslock);
list_add(&dev->entry, &g_smscore_devices);
kmutex_unlock(&g_smscore_deviceslock);
*coredev = dev;
sms_info("device %p created", dev);
return 0;
}
EXPORT_SYMBOL_GPL(smscore_register_device);
static int smscore_sendrequest_and_wait(struct smscore_device_t *coredev,
void *buffer, size_t size, struct completion *completion) {
int rc = coredev->sendrequest_handler(coredev->context, buffer, size);
if (rc < 0) {
sms_info("sendrequest returned error %d", rc);
return rc;
}
return wait_for_completion_timeout(completion,
msecs_to_jiffies(SMS_PROTOCOL_MAX_RAOUNDTRIP_MS)) ?
0 : -ETIME;
}
/**
* Starts & enables IR operations
*
* @return 0 on success, < 0 on error.
*/
static int smscore_init_ir(struct smscore_device_t *coredev)
{
int ir_io;
int rc;
void *buffer;
coredev->ir.input_dev = NULL;
ir_io = sms_get_board(smscore_get_board_id(coredev))->board_cfg.ir;
if (ir_io) {/* only if IR port exist we use IR sub-module */
sms_info("IR loading");
rc = sms_ir_init(coredev);
if (rc != 0)
sms_err("Error initialization DTV IR sub-module");
else {
buffer = kmalloc(sizeof(struct SmsMsgData_ST2) +
SMS_DMA_ALIGNMENT,
GFP_KERNEL | GFP_DMA);
if (buffer) {
struct SmsMsgData_ST2 *msg =
(struct SmsMsgData_ST2 *)
SMS_ALIGN_ADDRESS(buffer);
SMS_INIT_MSG(&msg->xMsgHeader,
MSG_SMS_START_IR_REQ,
sizeof(struct SmsMsgData_ST2));
msg->msgData[0] = coredev->ir.controller;
msg->msgData[1] = coredev->ir.timeout;
smsendian_handle_tx_message(
(struct SmsMsgHdr_ST2 *)msg);
rc = smscore_sendrequest_and_wait(coredev, msg,
msg->xMsgHeader. msgLength,
&coredev->ir_init_done);
kfree(buffer);
} else
sms_err
("Sending IR initialization message failed");
}
} else
sms_info("IR port has not been detected");
return 0;
}
/**
* sets initial device mode and notifies client hotplugs that device is ready
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
*
* @return 0 on success, <0 on error.
*/
int smscore_start_device(struct smscore_device_t *coredev)
{
int rc = smscore_set_device_mode(
coredev, smscore_registry_getmode(coredev->devpath));
if (rc < 0) {
sms_info("set device mode faile , rc %d", rc);
return rc;
}
kmutex_lock(&g_smscore_deviceslock);
rc = smscore_notify_callbacks(coredev, coredev->device, 1);
smscore_init_ir(coredev);
sms_info("device %p started, rc %d", coredev, rc);
kmutex_unlock(&g_smscore_deviceslock);
return rc;
}
EXPORT_SYMBOL_GPL(smscore_start_device);
static int smscore_load_firmware_family2(struct smscore_device_t *coredev,
void *buffer, size_t size)
{
struct SmsFirmware_ST *firmware = (struct SmsFirmware_ST *) buffer;
struct SmsMsgHdr_ST *msg;
u32 mem_address;
u8 *payload = firmware->Payload;
int rc = 0;
firmware->StartAddress = le32_to_cpu(firmware->StartAddress);
firmware->Length = le32_to_cpu(firmware->Length);
mem_address = firmware->StartAddress;
sms_info("loading FW to addr 0x%x size %d",
mem_address, firmware->Length);
if (coredev->preload_handler) {
rc = coredev->preload_handler(coredev->context);
if (rc < 0)
return rc;
}
/* PAGE_SIZE buffer shall be enough and dma aligned */
msg = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
if (!msg)
return -ENOMEM;
if (coredev->mode != DEVICE_MODE_NONE) {
sms_debug("sending reload command.");
SMS_INIT_MSG(msg, MSG_SW_RELOAD_START_REQ,
sizeof(struct SmsMsgHdr_ST));
rc = smscore_sendrequest_and_wait(coredev, msg,
msg->msgLength,
&coredev->reload_start_done);
mem_address = *(u32 *) &payload[20];
}
while (size && rc >= 0) {
struct SmsDataDownload_ST *DataMsg =
(struct SmsDataDownload_ST *) msg;
int payload_size = min((int) size, SMS_MAX_PAYLOAD_SIZE);
SMS_INIT_MSG(msg, MSG_SMS_DATA_DOWNLOAD_REQ,
(u16)(sizeof(struct SmsMsgHdr_ST) +
sizeof(u32) + payload_size));
DataMsg->MemAddr = mem_address;
memcpy(DataMsg->Payload, payload, payload_size);
if ((coredev->device_flags & SMS_ROM_NO_RESPONSE) &&
(coredev->mode == DEVICE_MODE_NONE))
rc = coredev->sendrequest_handler(
coredev->context, DataMsg,
DataMsg->xMsgHeader.msgLength);
else
rc = smscore_sendrequest_and_wait(
coredev, DataMsg,
DataMsg->xMsgHeader.msgLength,
&coredev->data_download_done);
payload += payload_size;
size -= payload_size;
mem_address += payload_size;
}
if (rc >= 0) {
if (coredev->mode == DEVICE_MODE_NONE) {
struct SmsMsgData_ST *TriggerMsg =
(struct SmsMsgData_ST *) msg;
SMS_INIT_MSG(msg, MSG_SMS_SWDOWNLOAD_TRIGGER_REQ,
sizeof(struct SmsMsgHdr_ST) +
sizeof(u32) * 5);
TriggerMsg->msgData[0] = firmware->StartAddress;
/* Entry point */
TriggerMsg->msgData[1] = 5; /* Priority */
TriggerMsg->msgData[2] = 0x200; /* Stack size */
TriggerMsg->msgData[3] = 0; /* Parameter */
TriggerMsg->msgData[4] = 4; /* Task ID */
if (coredev->device_flags & SMS_ROM_NO_RESPONSE) {
rc = coredev->sendrequest_handler(
coredev->context, TriggerMsg,
TriggerMsg->xMsgHeader.msgLength);
msleep(100);
} else
rc = smscore_sendrequest_and_wait(
coredev, TriggerMsg,
TriggerMsg->xMsgHeader.msgLength,
&coredev->trigger_done);
} else {
SMS_INIT_MSG(msg, MSG_SW_RELOAD_EXEC_REQ,
sizeof(struct SmsMsgHdr_ST));
rc = coredev->sendrequest_handler(coredev->context,
msg, msg->msgLength);
}
msleep(500);
}
sms_debug("rc=%d, postload=%p ", rc,
coredev->postload_handler);
kfree(msg);
return ((rc >= 0) && coredev->postload_handler) ?
coredev->postload_handler(coredev->context) :
rc;
}
/**
* loads specified firmware into a buffer and calls device loadfirmware_handler
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
* @param filename null-terminated string specifies firmware file name
* @param loadfirmware_handler device handler that loads firmware
*
* @return 0 on success, <0 on error.
*/
static int smscore_load_firmware_from_file(struct smscore_device_t *coredev,
char *filename,
loadfirmware_t loadfirmware_handler)
{
int rc = -ENOENT;
const struct firmware *fw;
u8 *fw_buffer;
if (loadfirmware_handler == NULL && !(coredev->device_flags &
SMS_DEVICE_FAMILY2))
return -EINVAL;
rc = request_firmware(&fw, filename, coredev->device);
if (rc < 0) {
sms_info("failed to open \"%s\"", filename);
return rc;
}
sms_info("read FW %s, size=%zd", filename, fw->size);
fw_buffer = kmalloc(ALIGN(fw->size, SMS_ALLOC_ALIGNMENT),
GFP_KERNEL | GFP_DMA);
if (fw_buffer) {
memcpy(fw_buffer, fw->data, fw->size);
rc = (coredev->device_flags & SMS_DEVICE_FAMILY2) ?
smscore_load_firmware_family2(coredev,
fw_buffer,
fw->size) :
loadfirmware_handler(coredev->context,
fw_buffer, fw->size);
kfree(fw_buffer);
} else {
sms_info("failed to allocate firmware buffer");
rc = -ENOMEM;
}
release_firmware(fw);
return rc;
}
/**
* notifies all clients registered with the device, notifies hotplugs,
* frees all buffers and coredev object
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
*
* @return 0 on success, <0 on error.
*/
void smscore_unregister_device(struct smscore_device_t *coredev)
{
struct smscore_buffer_t *cb;
int num_buffers = 0;
int retry = 0;
kmutex_lock(&g_smscore_deviceslock);
/* Release input device (IR) resources */
sms_ir_exit(coredev);
smscore_notify_clients(coredev);
smscore_notify_callbacks(coredev, NULL, 0);
/* at this point all buffers should be back
* onresponse must no longer be called */
while (1) {
while (!list_empty(&coredev->buffers)) {
cb = (struct smscore_buffer_t *) coredev->buffers.next;
list_del(&cb->entry);
kfree(cb);
num_buffers++;
}
if (num_buffers == coredev->num_buffers)
break;
if (++retry > 10) {
sms_info("exiting although "
"not all buffers released.");
break;
}
sms_info("waiting for %d buffer(s)",
coredev->num_buffers - num_buffers);
msleep(100);
}
sms_info("freed %d buffers", num_buffers);
if (coredev->common_buffer)
dma_free_coherent(NULL, coredev->common_buffer_size,
coredev->common_buffer, coredev->common_buffer_phys);
if (coredev->fw_buf != NULL)
kfree(coredev->fw_buf);
list_del(&coredev->entry);
kfree(coredev);
kmutex_unlock(&g_smscore_deviceslock);
sms_info("device %p destroyed", coredev);
}
EXPORT_SYMBOL_GPL(smscore_unregister_device);
static int smscore_detect_mode(struct smscore_device_t *coredev)
{
void *buffer = kmalloc(sizeof(struct SmsMsgHdr_ST) + SMS_DMA_ALIGNMENT,
GFP_KERNEL | GFP_DMA);
struct SmsMsgHdr_ST *msg =
(struct SmsMsgHdr_ST *) SMS_ALIGN_ADDRESS(buffer);
int rc;
if (!buffer)
return -ENOMEM;
SMS_INIT_MSG(msg, MSG_SMS_GET_VERSION_EX_REQ,
sizeof(struct SmsMsgHdr_ST));
rc = smscore_sendrequest_and_wait(coredev, msg, msg->msgLength,
&coredev->version_ex_done);
if (rc == -ETIME) {
sms_err("MSG_SMS_GET_VERSION_EX_REQ failed first try");
if (wait_for_completion_timeout(&coredev->resume_done,
msecs_to_jiffies(5000))) {
rc = smscore_sendrequest_and_wait(
coredev, msg, msg->msgLength,
&coredev->version_ex_done);
if (rc < 0)
sms_err("MSG_SMS_GET_VERSION_EX_REQ failed "
"second try, rc %d", rc);
} else
rc = -ETIME;
}
kfree(buffer);
return rc;
}
static char *smscore_fw_lkup[][SMS_NUM_OF_DEVICE_TYPES] = {
/*Stellar NOVA A0 Nova B0 VEGA*/
/*DVBT*/
{"none", "dvb_nova_12mhz.inp", "dvb_nova_12mhz_b0.inp", "none"},
/*DVBH*/
{"none", "dvb_nova_12mhz.inp", "dvb_nova_12mhz_b0.inp", "none"},
/*TDMB*/
{"none", "tdmb_nova_12mhz.inp", "tdmb_nova_12mhz_b0.inp", "none"},
/*DABIP*/
{"none", "none", "none", "none"},
/*BDA*/
{"none", "dvb_nova_12mhz.inp", "dvb_nova_12mhz_b0.inp", "none"},
/*ISDBT*/
{"none", "isdbt_nova_12mhz.inp", "isdbt_nova_12mhz_b0.inp", "none"},
/*ISDBTBDA*/
{"none", "isdbt_nova_12mhz.inp", "isdbt_nova_12mhz_b0.inp", "none"},
/*CMMB*/
{"none", "none", "none", "cmmb_vega_12mhz.inp"}
};
static inline char *sms_get_fw_name(struct smscore_device_t *coredev,
int mode, enum sms_device_type_st type)
{
char **fw = sms_get_board(smscore_get_board_id(coredev))->fw;
return (fw && fw[mode]) ? fw[mode] : smscore_fw_lkup[mode][type];
}
/**
* calls device handler to change mode of operation
* NOTE: stellar/usb may disconnect when changing mode
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
* @param mode requested mode of operation
*
* @return 0 on success, <0 on error.
*/
int smscore_set_device_mode(struct smscore_device_t *coredev, int mode)
{
void *buffer;
int rc = 0;
enum sms_device_type_st type;
sms_debug("set device mode to %d", mode);
if (coredev->device_flags & SMS_DEVICE_FAMILY2) {
if (mode < DEVICE_MODE_DVBT || mode >= DEVICE_MODE_RAW_TUNER) {
sms_err("invalid mode specified %d", mode);
return -EINVAL;
}
smscore_registry_setmode(coredev->devpath, mode);
if (!(coredev->device_flags & SMS_DEVICE_NOT_READY)) {
rc = smscore_detect_mode(coredev);
if (rc < 0) {
sms_err("mode detect failed %d", rc);
return rc;
}
}
if (coredev->mode == mode) {
sms_info("device mode %d already set", mode);
return 0;
}
if (!(coredev->modes_supported & (1 << mode))) {
char *fw_filename;
type = smscore_registry_gettype(coredev->devpath);
fw_filename = sms_get_fw_name(coredev, mode, type);
rc = smscore_load_firmware_from_file(coredev,
fw_filename, NULL);
if (rc < 0) {
sms_warn("error %d loading firmware: %s, "
"trying again with default firmware",
rc, fw_filename);
/* try again with the default firmware */
fw_filename = smscore_fw_lkup[mode][type];
rc = smscore_load_firmware_from_file(coredev,
fw_filename, NULL);
if (rc < 0) {
sms_warn("error %d loading "
"firmware: %s", rc,
fw_filename);
return rc;
}
}
sms_log("firmware download success: %s", fw_filename);
} else
sms_info("mode %d supported by running "
"firmware", mode);
buffer = kmalloc(sizeof(struct SmsMsgData_ST) +
SMS_DMA_ALIGNMENT, GFP_KERNEL | GFP_DMA);
if (buffer) {
struct SmsMsgData_ST *msg =
(struct SmsMsgData_ST *)
SMS_ALIGN_ADDRESS(buffer);
SMS_INIT_MSG(&msg->xMsgHeader, MSG_SMS_INIT_DEVICE_REQ,
sizeof(struct SmsMsgData_ST));
msg->msgData[0] = mode;
rc = smscore_sendrequest_and_wait(
coredev, msg, msg->xMsgHeader.msgLength,
&coredev->init_device_done);
kfree(buffer);
} else {
sms_err("Could not allocate buffer for "
"init device message.");
rc = -ENOMEM;
}
} else {
if (mode < DEVICE_MODE_DVBT || mode > DEVICE_MODE_DVBT_BDA) {
sms_err("invalid mode specified %d", mode);
return -EINVAL;
}
smscore_registry_setmode(coredev->devpath, mode);
if (coredev->detectmode_handler)
coredev->detectmode_handler(coredev->context,
&coredev->mode);
if (coredev->mode != mode && coredev->setmode_handler)
rc = coredev->setmode_handler(coredev->context, mode);
}
if (rc >= 0) {
coredev->mode = mode;
coredev->device_flags &= ~SMS_DEVICE_NOT_READY;
}
if (rc < 0)
sms_err("return error code %d.", rc);
return rc;
}
/**
* calls device handler to get current mode of operation
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
*
* @return current mode
*/
int smscore_get_device_mode(struct smscore_device_t *coredev)
{
return coredev->mode;
}
EXPORT_SYMBOL_GPL(smscore_get_device_mode);
/**
* find client by response id & type within the clients list.
* return client handle or NULL.
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
* @param data_type client data type (SMS_DONT_CARE for all types)
* @param id client id (SMS_DONT_CARE for all id)
*
*/
static struct
smscore_client_t *smscore_find_client(struct smscore_device_t *coredev,
int data_type, int id)
{
struct smscore_client_t *client = NULL;
struct list_head *next, *first;
unsigned long flags;
struct list_head *firstid, *nextid;
spin_lock_irqsave(&coredev->clientslock, flags);
first = &coredev->clients;
for (next = first->next;
(next != first) && !client;
next = next->next) {
firstid = &((struct smscore_client_t *)next)->idlist;
for (nextid = firstid->next;
nextid != firstid;
nextid = nextid->next) {
if ((((struct smscore_idlist_t *)nextid)->id == id) &&
(((struct smscore_idlist_t *)nextid)->data_type == data_type ||
(((struct smscore_idlist_t *)nextid)->data_type == 0))) {
client = (struct smscore_client_t *) next;
break;
}
}
}
spin_unlock_irqrestore(&coredev->clientslock, flags);
return client;
}
/**
* find client by response id/type, call clients onresponse handler
* return buffer to pool on error
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
* @param cb pointer to response buffer descriptor
*
*/
void smscore_onresponse(struct smscore_device_t *coredev,
struct smscore_buffer_t *cb) {
struct SmsMsgHdr_ST *phdr = (struct SmsMsgHdr_ST *) ((u8 *) cb->p
+ cb->offset);
struct smscore_client_t *client;
int rc = -EBUSY;
static unsigned long last_sample_time; /* = 0; */
static int data_total; /* = 0; */
unsigned long time_now = jiffies_to_msecs(jiffies);
if (!last_sample_time)
last_sample_time = time_now;
if (time_now - last_sample_time > 10000) {
sms_debug("\ndata rate %d bytes/secs",
(int)((data_total * 1000) /
(time_now - last_sample_time)));
last_sample_time = time_now;
data_total = 0;
}
data_total += cb->size;
/* Do we need to re-route? */
if ((phdr->msgType == MSG_SMS_HO_PER_SLICES_IND) ||
(phdr->msgType == MSG_SMS_TRANSMISSION_IND)) {
if (coredev->mode == DEVICE_MODE_DVBT_BDA)
phdr->msgDstId = DVBT_BDA_CONTROL_MSG_ID;
}
client = smscore_find_client(coredev, phdr->msgType, phdr->msgDstId);
/* If no client registered for type & id,
* check for control client where type is not registered */
if (client)
rc = client->onresponse_handler(client->context, cb);
if (rc < 0) {
switch (phdr->msgType) {
case MSG_SMS_GET_VERSION_EX_RES:
{
struct SmsVersionRes_ST *ver =
(struct SmsVersionRes_ST *) phdr;
sms_debug("MSG_SMS_GET_VERSION_EX_RES "
"id %d prots 0x%x ver %d.%d",
ver->FirmwareId, ver->SupportedProtocols,
ver->RomVersionMajor, ver->RomVersionMinor);
coredev->mode = ver->FirmwareId == 255 ?
DEVICE_MODE_NONE : ver->FirmwareId;
coredev->modes_supported = ver->SupportedProtocols;
complete(&coredev->version_ex_done);
break;
}
case MSG_SMS_INIT_DEVICE_RES:
sms_debug("MSG_SMS_INIT_DEVICE_RES");
complete(&coredev->init_device_done);
break;
case MSG_SW_RELOAD_START_RES:
sms_debug("MSG_SW_RELOAD_START_RES");
complete(&coredev->reload_start_done);
break;
case MSG_SMS_DATA_DOWNLOAD_RES:
complete(&coredev->data_download_done);
break;
case MSG_SW_RELOAD_EXEC_RES:
sms_debug("MSG_SW_RELOAD_EXEC_RES");
break;
case MSG_SMS_SWDOWNLOAD_TRIGGER_RES:
sms_debug("MSG_SMS_SWDOWNLOAD_TRIGGER_RES");
complete(&coredev->trigger_done);
break;
case MSG_SMS_SLEEP_RESUME_COMP_IND:
complete(&coredev->resume_done);
break;
case MSG_SMS_GPIO_CONFIG_EX_RES:
sms_debug("MSG_SMS_GPIO_CONFIG_EX_RES");
complete(&coredev->gpio_configuration_done);
break;
case MSG_SMS_GPIO_SET_LEVEL_RES:
sms_debug("MSG_SMS_GPIO_SET_LEVEL_RES");
complete(&coredev->gpio_set_level_done);
break;
case MSG_SMS_GPIO_GET_LEVEL_RES:
{
u32 *msgdata = (u32 *) phdr;
coredev->gpio_get_res = msgdata[1];
sms_debug("MSG_SMS_GPIO_GET_LEVEL_RES gpio level %d",
coredev->gpio_get_res);
complete(&coredev->gpio_get_level_done);
break;
}
case MSG_SMS_START_IR_RES:
complete(&coredev->ir_init_done);
break;
case MSG_SMS_IR_SAMPLES_IND:
sms_ir_event(coredev,
(const char *)
((char *)phdr
+ sizeof(struct SmsMsgHdr_ST)),
(int)phdr->msgLength
- sizeof(struct SmsMsgHdr_ST));
break;
default:
break;
}
smscore_putbuffer(coredev, cb);
}
}
EXPORT_SYMBOL_GPL(smscore_onresponse);
/**
* return pointer to next free buffer descriptor from core pool
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
*
* @return pointer to descriptor on success, NULL on error.
*/
struct smscore_buffer_t *smscore_getbuffer(struct smscore_device_t *coredev)
{
struct smscore_buffer_t *cb = NULL;
unsigned long flags;
DEFINE_WAIT(wait);
spin_lock_irqsave(&coredev->bufferslock, flags);
/* This function must return a valid buffer, since the buffer list is
* finite, we check that there is an available buffer, if not, we wait
* until such buffer become available.
*/
prepare_to_wait(&coredev->buffer_mng_waitq, &wait, TASK_INTERRUPTIBLE);
if (list_empty(&coredev->buffers))
schedule();
finish_wait(&coredev->buffer_mng_waitq, &wait);
cb = (struct smscore_buffer_t *) coredev->buffers.next;
list_del(&cb->entry);
spin_unlock_irqrestore(&coredev->bufferslock, flags);
return cb;
}
EXPORT_SYMBOL_GPL(smscore_getbuffer);
/**
* return buffer descriptor to a pool
*
* @param coredev pointer to a coredev object returned by
* smscore_register_device
* @param cb pointer buffer descriptor
*
*/
void smscore_putbuffer(struct smscore_device_t *coredev,
struct smscore_buffer_t *cb) {
wake_up_interruptible(&coredev->buffer_mng_waitq);
list_add_locked(&cb->entry, &coredev->buffers, &coredev->bufferslock);
}
EXPORT_SYMBOL_GPL(smscore_putbuffer);
static int smscore_validate_client(struct smscore_device_t *coredev,
struct smscore_client_t *client,
int data_type, int id)
{
struct smscore_idlist_t *listentry;
struct smscore_client_t *registered_client;
if (!client) {
sms_err("bad parameter.");
return -EFAULT;
}
registered_client = smscore_find_client(coredev, data_type, id);
if (registered_client == client)
return 0;
if (registered_client) {
sms_err("The msg ID already registered to another client.");
return -EEXIST;
}
listentry = kzalloc(sizeof(struct smscore_idlist_t), GFP_KERNEL);
if (!listentry) {
sms_err("Can't allocate memory for client id.");
return -ENOMEM;
}
listentry->id = id;
listentry->data_type = data_type;
list_add_locked(&listentry->entry, &client->idlist,
&coredev->clientslock);
return 0;
}
/**
* creates smsclient object, check that id is taken by another client
*
* @param coredev pointer to a coredev object from clients hotplug
* @param initial_id all messages with this id would be sent to this client
* @param data_type all messages of this type would be sent to this client
* @param onresponse_handler client handler that is called to
* process incoming messages
* @param onremove_handler client handler that is called when device is removed
* @param context client-specific context
* @param client pointer to a value that receives created smsclient object
*
* @return 0 on success, <0 on error.
*/
int smscore_register_client(struct smscore_device_t *coredev,
struct smsclient_params_t *params,
struct smscore_client_t **client)
{
struct smscore_client_t *newclient;
/* check that no other channel with same parameters exists */
if (smscore_find_client(coredev, params->data_type,
params->initial_id)) {
sms_err("Client already exist.");
return -EEXIST;
}
newclient = kzalloc(sizeof(struct smscore_client_t), GFP_KERNEL);
if (!newclient) {
sms_err("Failed to allocate memory for client.");
return -ENOMEM;
}
INIT_LIST_HEAD(&newclient->idlist);
newclient->coredev = coredev;
newclient->onresponse_handler = params->onresponse_handler;
newclient->onremove_handler = params->onremove_handler;
newclient->context = params->context;
list_add_locked(&newclient->entry, &coredev->clients,
&coredev->clientslock);
smscore_validate_client(coredev, newclient, params->data_type,
params->initial_id);
*client = newclient;
sms_debug("%p %d %d", params->context, params->data_type,
params->initial_id);
return 0;
}
EXPORT_SYMBOL_GPL(smscore_register_client);
/**
* frees smsclient object and all subclients associated with it
*
* @param client pointer to smsclient object returned by
* smscore_register_client
*
*/
void smscore_unregister_client(struct smscore_client_t *client)
{
struct smscore_device_t *coredev = client->coredev;
unsigned long flags;
spin_lock_irqsave(&coredev->clientslock, flags);
while (!list_empty(&client->idlist)) {
struct smscore_idlist_t *identry =
(struct smscore_idlist_t *) client->idlist.next;
list_del(&identry->entry);
kfree(identry);
}
sms_info("%p", client->context);
list_del(&client->entry);
kfree(client);
spin_unlock_irqrestore(&coredev->clientslock, flags);
}
EXPORT_SYMBOL_GPL(smscore_unregister_client);
/**
* verifies that source id is not taken by another client,
* calls device handler to send requests to the device
*
* @param client pointer to smsclient object returned by
* smscore_register_client
* @param buffer pointer to a request buffer
* @param size size (in bytes) of request buffer
*
* @return 0 on success, <0 on error.
*/
int smsclient_sendrequest(struct smscore_client_t *client,
void *buffer, size_t size)
{
struct smscore_device_t *coredev;
struct SmsMsgHdr_ST *phdr = (struct SmsMsgHdr_ST *) buffer;
int rc;
if (client == NULL) {
sms_err("Got NULL client");
return -EINVAL;
}
coredev = client->coredev;
/* check that no other channel with same id exists */
if (coredev == NULL) {
sms_err("Got NULL coredev");
return -EINVAL;
}
rc = smscore_validate_client(client->coredev, client, 0,
phdr->msgSrcId);
if (rc < 0)
return rc;
return coredev->sendrequest_handler(coredev->context, buffer, size);
}
EXPORT_SYMBOL_GPL(smsclient_sendrequest);
/* old GPIO managments implementation */
int smscore_configure_gpio(struct smscore_device_t *coredev, u32 pin,
struct smscore_config_gpio *pinconfig)
{
struct {
struct SmsMsgHdr_ST hdr;
u32 data[6];
} msg;
if (coredev->device_flags & SMS_DEVICE_FAMILY2) {
msg.hdr.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
msg.hdr.msgDstId = HIF_TASK;
msg.hdr.msgFlags = 0;
msg.hdr.msgType = MSG_SMS_GPIO_CONFIG_EX_REQ;
msg.hdr.msgLength = sizeof(msg);
msg.data[0] = pin;
msg.data[1] = pinconfig->pullupdown;
/* Convert slew rate for Nova: Fast(0) = 3 / Slow(1) = 0; */
msg.data[2] = pinconfig->outputslewrate == 0 ? 3 : 0;
switch (pinconfig->outputdriving) {
case SMS_GPIO_OUTPUTDRIVING_16mA:
msg.data[3] = 7; /* Nova - 16mA */
break;
case SMS_GPIO_OUTPUTDRIVING_12mA:
msg.data[3] = 5; /* Nova - 11mA */
break;
case SMS_GPIO_OUTPUTDRIVING_8mA:
msg.data[3] = 3; /* Nova - 7mA */
break;
case SMS_GPIO_OUTPUTDRIVING_4mA:
default:
msg.data[3] = 2; /* Nova - 4mA */
break;
}
msg.data[4] = pinconfig->direction;
msg.data[5] = 0;
} else /* TODO: SMS_DEVICE_FAMILY1 */
return -EINVAL;
return coredev->sendrequest_handler(coredev->context,
&msg, sizeof(msg));
}
int smscore_set_gpio(struct smscore_device_t *coredev, u32 pin, int level)
{
struct {
struct SmsMsgHdr_ST hdr;
u32 data[3];
} msg;
if (pin > MAX_GPIO_PIN_NUMBER)
return -EINVAL;
msg.hdr.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
msg.hdr.msgDstId = HIF_TASK;
msg.hdr.msgFlags = 0;
msg.hdr.msgType = MSG_SMS_GPIO_SET_LEVEL_REQ;
msg.hdr.msgLength = sizeof(msg);
msg.data[0] = pin;
msg.data[1] = level ? 1 : 0;
msg.data[2] = 0;
return coredev->sendrequest_handler(coredev->context,
&msg, sizeof(msg));
}
/* new GPIO managment implementation */
static int GetGpioPinParams(u32 PinNum, u32 *pTranslatedPinNum,
u32 *pGroupNum, u32 *pGroupCfg) {
*pGroupCfg = 1;
if (PinNum >= 0 && PinNum <= 1) {
*pTranslatedPinNum = 0;
*pGroupNum = 9;
*pGroupCfg = 2;
} else if (PinNum >= 2 && PinNum <= 6) {
*pTranslatedPinNum = 2;
*pGroupNum = 0;
*pGroupCfg = 2;
} else if (PinNum >= 7 && PinNum <= 11) {
*pTranslatedPinNum = 7;
*pGroupNum = 1;
} else if (PinNum >= 12 && PinNum <= 15) {
*pTranslatedPinNum = 12;
*pGroupNum = 2;
*pGroupCfg = 3;
} else if (PinNum == 16) {
*pTranslatedPinNum = 16;
*pGroupNum = 23;
} else if (PinNum >= 17 && PinNum <= 24) {
*pTranslatedPinNum = 17;
*pGroupNum = 3;
} else if (PinNum == 25) {
*pTranslatedPinNum = 25;
*pGroupNum = 6;
} else if (PinNum >= 26 && PinNum <= 28) {
*pTranslatedPinNum = 26;
*pGroupNum = 4;
} else if (PinNum == 29) {
*pTranslatedPinNum = 29;
*pGroupNum = 5;
*pGroupCfg = 2;
} else if (PinNum == 30) {
*pTranslatedPinNum = 30;
*pGroupNum = 8;
} else if (PinNum == 31) {
*pTranslatedPinNum = 31;
*pGroupNum = 17;
} else
return -1;
*pGroupCfg <<= 24;
return 0;
}
int smscore_gpio_configure(struct smscore_device_t *coredev, u8 PinNum,
struct smscore_gpio_config *pGpioConfig) {
u32 totalLen;
u32 TranslatedPinNum = 0;
u32 GroupNum = 0;
u32 ElectricChar;
u32 groupCfg;
void *buffer;
int rc;
struct SetGpioMsg {
struct SmsMsgHdr_ST xMsgHeader;
u32 msgData[6];
} *pMsg;
if (PinNum > MAX_GPIO_PIN_NUMBER)
return -EINVAL;
if (pGpioConfig == NULL)
return -EINVAL;
totalLen = sizeof(struct SmsMsgHdr_ST) + (sizeof(u32) * 6);
buffer = kmalloc(totalLen + SMS_DMA_ALIGNMENT,
GFP_KERNEL | GFP_DMA);
if (!buffer)
return -ENOMEM;
pMsg = (struct SetGpioMsg *) SMS_ALIGN_ADDRESS(buffer);
pMsg->xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
pMsg->xMsgHeader.msgDstId = HIF_TASK;
pMsg->xMsgHeader.msgFlags = 0;
pMsg->xMsgHeader.msgLength = (u16) totalLen;
pMsg->msgData[0] = PinNum;
if (!(coredev->device_flags & SMS_DEVICE_FAMILY2)) {
pMsg->xMsgHeader.msgType = MSG_SMS_GPIO_CONFIG_REQ;
if (GetGpioPinParams(PinNum, &TranslatedPinNum, &GroupNum,
&groupCfg) != 0)
return -EINVAL;
pMsg->msgData[1] = TranslatedPinNum;
pMsg->msgData[2] = GroupNum;
ElectricChar = (pGpioConfig->PullUpDown)
| (pGpioConfig->InputCharacteristics << 2)
| (pGpioConfig->OutputSlewRate << 3)
| (pGpioConfig->OutputDriving << 4);
pMsg->msgData[3] = ElectricChar;
pMsg->msgData[4] = pGpioConfig->Direction;
pMsg->msgData[5] = groupCfg;
} else {
pMsg->xMsgHeader.msgType = MSG_SMS_GPIO_CONFIG_EX_REQ;
pMsg->msgData[1] = pGpioConfig->PullUpDown;
pMsg->msgData[2] = pGpioConfig->OutputSlewRate;
pMsg->msgData[3] = pGpioConfig->OutputDriving;
pMsg->msgData[4] = pGpioConfig->Direction;
pMsg->msgData[5] = 0;
}
smsendian_handle_tx_message((struct SmsMsgHdr_ST *)pMsg);
rc = smscore_sendrequest_and_wait(coredev, pMsg, totalLen,
&coredev->gpio_configuration_done);
if (rc != 0) {
if (rc == -ETIME)
sms_err("smscore_gpio_configure timeout");
else
sms_err("smscore_gpio_configure error");
}
kfree(buffer);
return rc;
}
int smscore_gpio_set_level(struct smscore_device_t *coredev, u8 PinNum,
u8 NewLevel) {
u32 totalLen;
int rc;
void *buffer;
struct SetGpioMsg {
struct SmsMsgHdr_ST xMsgHeader;
u32 msgData[3]; /* keep it 3 ! */
} *pMsg;
if ((NewLevel > 1) || (PinNum > MAX_GPIO_PIN_NUMBER) ||
(PinNum > MAX_GPIO_PIN_NUMBER))
return -EINVAL;
totalLen = sizeof(struct SmsMsgHdr_ST) +
(3 * sizeof(u32)); /* keep it 3 ! */
buffer = kmalloc(totalLen + SMS_DMA_ALIGNMENT,
GFP_KERNEL | GFP_DMA);
if (!buffer)
return -ENOMEM;
pMsg = (struct SetGpioMsg *) SMS_ALIGN_ADDRESS(buffer);
pMsg->xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
pMsg->xMsgHeader.msgDstId = HIF_TASK;
pMsg->xMsgHeader.msgFlags = 0;
pMsg->xMsgHeader.msgType = MSG_SMS_GPIO_SET_LEVEL_REQ;
pMsg->xMsgHeader.msgLength = (u16) totalLen;
pMsg->msgData[0] = PinNum;
pMsg->msgData[1] = NewLevel;
/* Send message to SMS */
smsendian_handle_tx_message((struct SmsMsgHdr_ST *)pMsg);
rc = smscore_sendrequest_and_wait(coredev, pMsg, totalLen,
&coredev->gpio_set_level_done);
if (rc != 0) {
if (rc == -ETIME)
sms_err("smscore_gpio_set_level timeout");
else
sms_err("smscore_gpio_set_level error");
}
kfree(buffer);
return rc;
}
int smscore_gpio_get_level(struct smscore_device_t *coredev, u8 PinNum,
u8 *level) {
u32 totalLen;
int rc;
void *buffer;
struct SetGpioMsg {
struct SmsMsgHdr_ST xMsgHeader;
u32 msgData[2];
} *pMsg;
if (PinNum > MAX_GPIO_PIN_NUMBER)
return -EINVAL;
totalLen = sizeof(struct SmsMsgHdr_ST) + (2 * sizeof(u32));
buffer = kmalloc(totalLen + SMS_DMA_ALIGNMENT,
GFP_KERNEL | GFP_DMA);
if (!buffer)
return -ENOMEM;
pMsg = (struct SetGpioMsg *) SMS_ALIGN_ADDRESS(buffer);
pMsg->xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
pMsg->xMsgHeader.msgDstId = HIF_TASK;
pMsg->xMsgHeader.msgFlags = 0;
pMsg->xMsgHeader.msgType = MSG_SMS_GPIO_GET_LEVEL_REQ;
pMsg->xMsgHeader.msgLength = (u16) totalLen;
pMsg->msgData[0] = PinNum;
pMsg->msgData[1] = 0;
/* Send message to SMS */
smsendian_handle_tx_message((struct SmsMsgHdr_ST *)pMsg);
rc = smscore_sendrequest_and_wait(coredev, pMsg, totalLen,
&coredev->gpio_get_level_done);
if (rc != 0) {
if (rc == -ETIME)
sms_err("smscore_gpio_get_level timeout");
else
sms_err("smscore_gpio_get_level error");
}
kfree(buffer);
/* Its a race between other gpio_get_level() and the copy of the single
* global 'coredev->gpio_get_res' to the function's variable 'level'
*/
*level = coredev->gpio_get_res;
return rc;
}
static int __init smscore_module_init(void)
{
int rc = 0;
INIT_LIST_HEAD(&g_smscore_notifyees);
INIT_LIST_HEAD(&g_smscore_devices);
kmutex_init(&g_smscore_deviceslock);
INIT_LIST_HEAD(&g_smscore_registry);
kmutex_init(&g_smscore_registrylock);
return rc;
}
static void __exit smscore_module_exit(void)
{
kmutex_lock(&g_smscore_deviceslock);
while (!list_empty(&g_smscore_notifyees)) {
struct smscore_device_notifyee_t *notifyee =
(struct smscore_device_notifyee_t *)
g_smscore_notifyees.next;
list_del(&notifyee->entry);
kfree(notifyee);
}
kmutex_unlock(&g_smscore_deviceslock);
kmutex_lock(&g_smscore_registrylock);
while (!list_empty(&g_smscore_registry)) {
struct smscore_registry_entry_t *entry =
(struct smscore_registry_entry_t *)
g_smscore_registry.next;
list_del(&entry->entry);
kfree(entry);
}
kmutex_unlock(&g_smscore_registrylock);
sms_debug("");
}
module_init(smscore_module_init);
module_exit(smscore_module_exit);
MODULE_DESCRIPTION("Siano MDTV Core module");
MODULE_AUTHOR("Siano Mobile Silicon, Inc. (uris@siano-ms.com)");
MODULE_LICENSE("GPL");
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