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linux-next/drivers/media/mdtv/smscoreapi.c

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/*
* Driver for the Siano SMS10xx USB dongle
*
* Copyright (c) 2008 <TODO: INSERT ALL COPYRIGHT OWNERS and MAINT. NAMES HERE>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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.
*/
/*!
\file smscoreapi.c
\brief Siano core API module
This file contains implementation for the interface to sms core component
\par Copyright (c), 2005-2008 Siano Mobile Silicon, Inc.
\par This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 3 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.
\author Anatoly Greenblat
*/
#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 <asm/io.h>
#include <linux/firmware.h>
#include "smscoreapi.h"
typedef struct _smscore_device_notifyee
{
struct list_head entry;
hotplug_t hotplug;
} smscore_device_notifyee_t;
typedef struct _smscore_client
{
struct list_head entry;
smscore_device_t *coredev;
void *context;
int data_type;
onresponse_t onresponse_handler;
onremove_t onremove_handler;
} *psmscore_client_t;
typedef struct _smscore_subclient
{
struct list_head entry;
smscore_client_t *client;
int id;
} smscore_subclient_t;
typedef struct _smscore_device
{
struct list_head entry;
struct list_head clients;
struct list_head subclients;
spinlock_t clientslock;
struct list_head buffers;
spinlock_t bufferslock;
int num_buffers;
void *common_buffer;
int common_buffer_size;
dma_addr_t common_buffer_phys;
void *context;
struct device *device;
char devpath[32];
unsigned long device_flags;
setmode_t setmode_handler;
detectmode_t detectmode_handler;
sendrequest_t sendrequest_handler;
preload_t preload_handler;
postload_t postload_handler;
int mode, modes_supported;
struct completion version_ex_done, data_download_done, trigger_done;
struct completion init_device_done, reload_start_done, resume_done;
} *psmscore_device_t;
typedef struct _smscore_registry_entry
{
struct list_head entry;
char devpath[32];
int mode;
} smscore_registry_entry_t;
struct list_head g_smscore_notifyees;
struct list_head g_smscore_devices;
kmutex_t g_smscore_deviceslock;
struct list_head g_smscore_registry;
kmutex_t g_smscore_registrylock;
static int default_mode = 1;
module_param(default_mode, int, 0644);
MODULE_PARM_DESC(default_mode, "default firmware id (device mode)");
int smscore_registry_getmode(char* devpath)
{
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 = (smscore_registry_entry_t *) next;
if (!strcmp(entry->devpath, devpath))
{
kmutex_unlock(&g_smscore_registrylock);
return entry->mode;
}
}
entry = (smscore_registry_entry_t *) kmalloc(sizeof(smscore_registry_entry_t), GFP_KERNEL);
if (entry)
{
entry->mode = default_mode;
strcpy(entry->devpath, devpath);
list_add(&entry->entry, &g_smscore_registry);
}
kmutex_unlock(&g_smscore_registrylock);
return default_mode;
}
void smscore_registry_setmode(char* devpath, int mode)
{
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 = (smscore_registry_entry_t *) next;
if (!strcmp(entry->devpath, devpath))
{
entry->mode = mode;
break;
}
}
kmutex_unlock(&g_smscore_registrylock);
}
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)
{
smscore_device_notifyee_t *notifyee;
struct list_head *next, *first;
int rc = 0;
kmutex_lock(&g_smscore_deviceslock);
notifyee = kmalloc(sizeof(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)
{
smscore_device_t *coredev = (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;
}
/**
* 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;)
{
smscore_device_notifyee_t *notifyee = (smscore_device_notifyee_t *) next;
next = next->next;
if (notifyee->hotplug == hotplug)
{
list_del(&notifyee->entry);
kfree(notifyee);
}
}
kmutex_unlock(&g_smscore_deviceslock);
}
void smscore_notify_clients(smscore_device_t *coredev)
{
smscore_client_t* client;
// the client must call smscore_unregister_client from remove handler
while (!list_empty(&coredev->clients))
{
client = (smscore_client_t *) coredev->clients.next;
client->onremove_handler(client->context);
}
}
int smscore_notify_callbacks(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 = ((smscore_device_notifyee_t *) next)->hotplug(coredev, device, arrival);
if (rc < 0)
break;
}
return rc;
}
smscore_buffer_t *smscore_createbuffer(u8* buffer, void* common_buffer, dma_addr_t common_buffer_phys)
{
smscore_buffer_t *cb = kmalloc(sizeof(smscore_buffer_t), GFP_KERNEL);
if (!cb)
{
printk(KERN_INFO "%s kmalloc(...) failed\n", __FUNCTION__);
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(smsdevice_params_t *params, smscore_device_t **coredev)
{
smscore_device_t* dev;
u8 *buffer;
dev = kzalloc(sizeof(smscore_device_t), GFP_KERNEL);
if (!dev)
{
printk(KERN_INFO "%s kzalloc(...) failed\n", __FUNCTION__);
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->subclients);
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);
// 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)
{
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);
}
printk(KERN_INFO "%s allocated %d buffers\n", __FUNCTION__, 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);
// add device to devices list
kmutex_lock(&g_smscore_deviceslock);
list_add(&dev->entry, &g_smscore_devices);
kmutex_unlock(&g_smscore_deviceslock);
*coredev = dev;
printk(KERN_INFO "%s device %p created\n", __FUNCTION__, dev);
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(smscore_device_t *coredev)
{
int rc = smscore_set_device_mode(coredev, smscore_registry_getmode(coredev->devpath));
if (rc < 0)
return rc;
kmutex_lock(&g_smscore_deviceslock);
rc = smscore_notify_callbacks(coredev, coredev->device, 1);
printk(KERN_INFO "%s device %p started, rc %d\n", __FUNCTION__, coredev, rc);
kmutex_unlock(&g_smscore_deviceslock);
return rc;
}
int smscore_sendrequest_and_wait(smscore_device_t *coredev, void* buffer, size_t size, struct completion *completion)
{
int rc = coredev->sendrequest_handler(coredev->context, buffer, size);
if (rc < 0)
return rc;
return wait_for_completion_timeout(completion, msecs_to_jiffies(1000)) ? 0 : -ETIME;
}
int smscore_load_firmware_family2(smscore_device_t *coredev, void *buffer, size_t size)
{
SmsFirmware_ST* firmware = (SmsFirmware_ST*) buffer;
SmsMsgHdr_ST *msg;
UINT32 mem_address = firmware->StartAddress;
u8* payload = firmware->Payload;
int rc = 0;
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 = (SmsMsgHdr_ST *) kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
if (!msg)
return -ENOMEM;
if (coredev->mode != DEVICE_MODE_NONE)
{
SMS_INIT_MSG(msg, MSG_SW_RELOAD_START_REQ, sizeof(SmsMsgHdr_ST));
rc = smscore_sendrequest_and_wait(coredev, msg, msg->msgLength, &coredev->reload_start_done);
mem_address = *(UINT32*) &payload[20];
}
while (size && rc >= 0)
{
SmsDataDownload_ST *DataMsg = (SmsDataDownload_ST *) msg;
int payload_size = min((int) size, SMS_MAX_PAYLOAD_SIZE);
SMS_INIT_MSG(msg, MSG_SMS_DATA_DOWNLOAD_REQ, (UINT16)(sizeof(SmsMsgHdr_ST) + sizeof(UINT32) + 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)
{
SmsMsgData_ST* TriggerMsg = (SmsMsgData_ST*) msg;
SMS_INIT_MSG(msg, MSG_SMS_SWDOWNLOAD_TRIGGER_REQ, sizeof(SmsMsgHdr_ST) + sizeof(UINT32) * 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(SmsMsgHdr_ST));
rc = coredev->sendrequest_handler(coredev->context, msg, msg->msgLength);
}
}
printk("%s %d \n", __func__, rc);
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.
*/
int smscore_load_firmware(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)
{
printk(KERN_INFO "%s failed to open \"%s\"\n", __FUNCTION__, filename);
return rc;
}
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
{
printk(KERN_INFO "%s failed to allocate firmware buffer\n", __FUNCTION__);
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(smscore_device_t *coredev)
{
smscore_buffer_t *cb;
int num_buffers = 0;
kmutex_lock(&g_smscore_deviceslock);
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 ((cb = smscore_getbuffer(coredev)))
{
kfree(cb);
num_buffers ++;
}
if (num_buffers == coredev->num_buffers)
break;
printk(KERN_INFO "%s waiting for %d buffer(s)\n", __FUNCTION__, coredev->num_buffers - num_buffers);
msleep(100);
}
printk(KERN_INFO "%s freed %d buffers\n", __FUNCTION__, num_buffers);
if (coredev->common_buffer)
dma_free_coherent(NULL, coredev->common_buffer_size, coredev->common_buffer, coredev->common_buffer_phys);
list_del(&coredev->entry);
kfree(coredev);
kmutex_unlock(&g_smscore_deviceslock);
printk(KERN_INFO "%s device %p destroyed\n", __FUNCTION__, coredev);
}
int smscore_detect_mode(smscore_device_t *coredev)
{
void *buffer = kmalloc(sizeof(SmsMsgHdr_ST) + SMS_DMA_ALIGNMENT, GFP_KERNEL | GFP_DMA);
SmsMsgHdr_ST *msg = (SmsMsgHdr_ST *) SMS_ALIGN_ADDRESS(buffer);
int rc;
if (!buffer)
return -ENOMEM;
SMS_INIT_MSG(msg, MSG_SMS_GET_VERSION_EX_REQ, sizeof(SmsMsgHdr_ST));
rc = smscore_sendrequest_and_wait(coredev, msg, msg->msgLength, &coredev->version_ex_done);
if (rc == -ETIME)
{
printk("%s: MSG_SMS_GET_VERSION_EX_REQ failed first try\n", __FUNCTION__);
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)
{
printk("%s: MSG_SMS_GET_VERSION_EX_REQ failed second try, rc %d\n", __FUNCTION__, rc);
}
}
else
rc = -ETIME;
}
kfree(buffer);
return rc;
}
char *smscore_fw_lkup[] =
{
"dvb_nova_12mhz.inp",
"dvb_nova_12mhz.inp",
"tdmb_nova.inp",
"none",
"dvb_nova_12mhz.inp",
"isdbt_nova_12mhz.inp",
"isdbt_nova_12mhz.inp",
"cmmb_nova_12mhz.inp",
"none",
};
/**
* 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(smscore_device_t *coredev, int mode)
{
void *buffer;
int rc = 0;
if (coredev->device_flags & SMS_DEVICE_FAMILY2)
{
if (mode < DEVICE_MODE_DVBT || mode > DEVICE_MODE_RAW_TUNER)
{
printk(KERN_INFO "%s invalid mode specified %d\n", __FUNCTION__, mode);
return -EINVAL;
}
if (!(coredev->device_flags & SMS_DEVICE_NOT_READY))
{
rc = smscore_detect_mode(coredev);
if (rc < 0)
return rc;
}
if (coredev->mode == mode)
{
printk(KERN_INFO "%s device mode %d already set\n", __FUNCTION__, mode);
return 0;
}
if (!(coredev->modes_supported & (1 << mode)))
{
rc = smscore_load_firmware(coredev, smscore_fw_lkup[mode], NULL);
if (rc < 0)
return rc;
}
else
{
printk(KERN_INFO "%s mode %d supported by running firmware\n", __FUNCTION__, mode);
}
buffer = kmalloc(sizeof(SmsMsgData_ST) + SMS_DMA_ALIGNMENT, GFP_KERNEL | GFP_DMA);
if (buffer)
{
SmsMsgData_ST *msg = (SmsMsgData_ST *) SMS_ALIGN_ADDRESS(buffer);
SMS_INIT_MSG(&msg->xMsgHeader, MSG_SMS_INIT_DEVICE_REQ, sizeof(SmsMsgData_ST));
msg->msgData[0] = mode;
rc = smscore_sendrequest_and_wait(coredev, msg, msg->xMsgHeader.msgLength, &coredev->init_device_done);
kfree(buffer);
}
else
rc = -ENOMEM;
}
else
{
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);
}
smscore_registry_setmode(coredev->devpath, mode);
if (rc >= 0)
{
coredev->mode = mode;
coredev->device_flags &= ~SMS_DEVICE_NOT_READY;
}
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(smscore_device_t *coredev)
{
return coredev->mode;
}
smscore_client_t* smscore_getclient_by_type(smscore_device_t *coredev, int data_type)
{
smscore_client_t *client = NULL;
struct list_head *next, *first;
unsigned long flags;
if (!data_type)
return NULL;
spin_lock_irqsave(&coredev->clientslock, flags);
first = &coredev->clients;
for (next = first->next; next != first; next = next->next)
{
if (((smscore_client_t*) next)->data_type == data_type)
{
client = (smscore_client_t*) next;
break;
}
}
spin_unlock_irqrestore(&coredev->clientslock, flags);
return client;
}
smscore_client_t* smscore_getclient_by_id(smscore_device_t *coredev, int id)
{
smscore_client_t *client = NULL;
struct list_head *next, *first;
unsigned long flags;
spin_lock_irqsave(&coredev->clientslock, flags);
first = &coredev->subclients;
for (next = first->next; next != first; next = next->next)
{
if (((smscore_subclient_t*) next)->id == id)
{
client = ((smscore_subclient_t*) next)->client;
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(smscore_device_t *coredev, smscore_buffer_t *cb)
{
SmsMsgHdr_ST *phdr = (SmsMsgHdr_ST *)((u8*) cb->p + cb->offset);
smscore_client_t * client = smscore_getclient_by_type(coredev, phdr->msgType);
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)
{
printk("\n%s data rate %d bytes/secs\n", __func__, (int)((data_total * 1000) / (time_now - last_sample_time)));
last_sample_time = time_now;
data_total = 0;
}
data_total += cb->size;
if (!client)
client = smscore_getclient_by_id(coredev, phdr->msgDstId);
if (client)
rc = client->onresponse_handler(client->context, cb);
if (rc < 0)
{
switch (phdr->msgType)
{
case MSG_SMS_GET_VERSION_EX_RES:
{
SmsVersionRes_ST *ver = (SmsVersionRes_ST*) phdr;
printk("%s: MSG_SMS_GET_VERSION_EX_RES id %d prots 0x%x ver %d.%d\n", __FUNCTION__, 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:
printk("%s: MSG_SMS_INIT_DEVICE_RES\n", __FUNCTION__);
complete(&coredev->init_device_done);
break;
case MSG_SW_RELOAD_START_RES:
printk("%s: MSG_SW_RELOAD_START_RES\n", __FUNCTION__);
complete(&coredev->reload_start_done);
break;
case MSG_SMS_DATA_DOWNLOAD_RES:
complete(&coredev->data_download_done);
break;
case MSG_SW_RELOAD_EXEC_RES:
printk("%s: MSG_SW_RELOAD_EXEC_RES\n", __FUNCTION__);
break;
case MSG_SMS_SWDOWNLOAD_TRIGGER_RES:
printk("%s: MSG_SMS_SWDOWNLOAD_TRIGGER_RES\n", __FUNCTION__);
complete(&coredev->trigger_done);
break;
case MSG_SMS_SLEEP_RESUME_COMP_IND:
complete(&coredev->resume_done);
break;
default:
printk(KERN_INFO "%s no client (%p) or error (%d), type:%d dstid:%d\n", __FUNCTION__, client, rc, phdr->msgType, phdr->msgDstId);
}
smscore_putbuffer(coredev, cb);
}
}
/**
* 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.
*/
smscore_buffer_t *smscore_getbuffer(smscore_device_t *coredev)
{
smscore_buffer_t *cb = NULL;
unsigned long flags;
spin_lock_irqsave(&coredev->bufferslock, flags);
if (!list_empty(&coredev->buffers))
{
cb = (smscore_buffer_t *) coredev->buffers.next;
list_del(&cb->entry);
}
spin_unlock_irqrestore(&coredev->bufferslock, flags);
return cb;
}
/**
* 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(smscore_device_t *coredev, smscore_buffer_t *cb)
{
list_add_locked(&cb->entry, &coredev->buffers, &coredev->bufferslock);
}
int smscore_validate_client(smscore_device_t *coredev, smscore_client_t *client, int id)
{
smscore_client_t *existing_client;
smscore_subclient_t *subclient;
if (!id)
return 0;
existing_client = smscore_getclient_by_id(coredev, id);
if (existing_client == client)
return 0;
if (existing_client)
return -EBUSY;
subclient = kzalloc(sizeof(smscore_subclient_t), GFP_KERNEL);
if (!subclient)
return -ENOMEM;
subclient->client = client;
subclient->id = id;
list_add_locked(&subclient->entry, &coredev->subclients, &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(smscore_device_t *coredev, smsclient_params_t *params, smscore_client_t **client)
{
smscore_client_t* newclient;
int rc;
// check that no other channel with same data type exists
if (params->data_type && smscore_getclient_by_type(coredev, params->data_type))
return -EEXIST;
newclient = kzalloc(sizeof(smscore_client_t), GFP_KERNEL);
if (!newclient)
return -ENOMEM;
// check that no other channel with same id exists
rc = smscore_validate_client(coredev, newclient, params->initial_id);
if (rc < 0)
{
kfree(newclient);
return rc;
}
newclient->coredev = coredev;
newclient->data_type = params->data_type;
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);
*client = newclient;
printk(KERN_INFO "%s %p %d %d\n", __FUNCTION__, params->context, params->data_type, params->initial_id);
return 0;
}
/**
* frees smsclient object and all subclients associated with it
*
* @param client pointer to smsclient object returned by smscore_register_client
*
*/
void smscore_unregister_client(smscore_client_t *client)
{
smscore_device_t *coredev = client->coredev;
struct list_head *next, *first;
unsigned long flags;
spin_lock_irqsave(&coredev->clientslock, flags);
first = &coredev->subclients;
for (next = first->next; next != first;)
{
smscore_subclient_t *subclient = (smscore_subclient_t *) next;
next = next->next;
if (subclient->client == client)
{
list_del(&subclient->entry);
kfree(subclient);
}
}
printk(KERN_INFO "%s %p %d\n", __FUNCTION__, client->context, client->data_type);
list_del(&client->entry);
kfree(client);
spin_unlock_irqrestore(&coredev->clientslock, flags);
}
/**
* 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(smscore_client_t *client, void *buffer, size_t size)
{
smscore_device_t* coredev = client->coredev;
SmsMsgHdr_ST* phdr = (SmsMsgHdr_ST*) buffer;
// check that no other channel with same id exists
int rc = smscore_validate_client(client->coredev, client, phdr->msgSrcId);
if (rc < 0)
return rc;
return coredev->sendrequest_handler(coredev->context, buffer, size);
}
/**
* return the size of large (common) buffer
*
* @param coredev pointer to a coredev object from clients hotplug
*
* @return size (in bytes) of the buffer
*/
int smscore_get_common_buffer_size(smscore_device_t *coredev)
{
return coredev->common_buffer_size;
}
/**
* maps common buffer (if supported by platform)
*
* @param coredev pointer to a coredev object from clients hotplug
* @param vma pointer to vma struct from mmap handler
*
* @return 0 on success, <0 on error.
*/
int smscore_map_common_buffer(smscore_device_t *coredev, struct vm_area_struct * vma)
{
unsigned long end = vma->vm_end, start = vma->vm_start, size = PAGE_ALIGN(coredev->common_buffer_size);
if (!(vma->vm_flags & (VM_READ | VM_SHARED)) || (vma->vm_flags & VM_WRITE))
{
printk(KERN_INFO "%s invalid vm flags\n", __FUNCTION__);
return -EINVAL;
}
if ((end - start) != size)
{
printk(KERN_INFO "%s invalid size %d expected %d\n", __FUNCTION__, (int)(end - start), (int) size);
return -EINVAL;
}
if (remap_pfn_range(vma, start, coredev->common_buffer_phys >> PAGE_SHIFT, size, pgprot_noncached(vma->vm_page_prot)))
{
printk(KERN_INFO "%s remap_page_range failed\n", __FUNCTION__);
return -EAGAIN;
}
return 0;
}
int 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);
/* USB Register */
rc = smsusb_register();
/* DVB Register */
rc = smsdvb_register();
printk(KERN_INFO "%s, rc %d\n", __FUNCTION__, rc);
return rc;
}
void smscore_module_exit(void)
{
kmutex_lock(&g_smscore_deviceslock);
while (!list_empty(&g_smscore_notifyees))
{
smscore_device_notifyee_t *notifyee = (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))
{
smscore_registry_entry_t *entry = (smscore_registry_entry_t *) g_smscore_registry.next;
list_del(&entry->entry);
kfree(entry);
}
kmutex_unlock(&g_smscore_registrylock);
/* DVB UnRegister */
smsdvb_unregister();
/* Unregister USB */
smsusb_unregister();
printk(KERN_INFO "%s\n", __FUNCTION__);
}
module_init(smscore_module_init);
module_exit(smscore_module_exit);
MODULE_DESCRIPTION("smscore");
MODULE_AUTHOR("Anatoly Greenblatt,,, (anatolyg@siano-ms.com)");
MODULE_LICENSE("GPL");