V4L/DVB (8272): sms1xxx: move driver from media/mdtv/ to media/dvb/siano/

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 1158 insertions, 0 deletions

diff --git a/drivers/media/dvb/siano/smscoreapi.c b/drivers/media/dvb/siano/smscoreapi.c
new file mode 100644
index 00000000000..d3ba1fcde54
--- /dev/null
+++ b/drivers/media/dvb/siano/smscoreapi.c
@@ -0,0 +1,1158 @@
+/*
+ *  Siano core API module
+ *
+ *  This file contains implementation for the interface to sms core component
+ *
+ *  author: Anatoly Greenblat
+ *
+ *  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 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.
+ *
+ *  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 <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");
+