diff options
Diffstat (limited to 'drivers/staging/intel_sst/intel_sst.c')
| -rw-r--r-- | drivers/staging/intel_sst/intel_sst.c | 649 |
1 files changed, 0 insertions, 649 deletions
diff --git a/drivers/staging/intel_sst/intel_sst.c b/drivers/staging/intel_sst/intel_sst.c deleted file mode 100644 index ff9aaec0557f..000000000000 --- a/drivers/staging/intel_sst/intel_sst.c +++ /dev/null @@ -1,649 +0,0 @@ -/* - * intel_sst.c - Intel SST Driver for audio engine - * - * Copyright (C) 2008-10 Intel Corp - * Authors: Vinod Koul <vinod.koul@intel.com> - * Harsha Priya <priya.harsha@intel.com> - * Dharageswari R <dharageswari.r@intel.com> - * KP Jeeja <jeeja.kp@intel.com> - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * 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; version 2 of the License. - * - * 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., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This driver exposes the audio engine functionalities to the ALSA - * and middleware. - * - * This file contains all init functions - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/pci.h> -#include <linux/fs.h> -#include <linux/interrupt.h> -#include <linux/firmware.h> -#include <linux/miscdevice.h> -#include <linux/pm_runtime.h> -#include <linux/module.h> -#include <asm/mrst.h> -#include "intel_sst.h" -#include "intel_sst_ioctl.h" -#include "intel_sst_fw_ipc.h" -#include "intel_sst_common.h" - - -MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>"); -MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>"); -MODULE_AUTHOR("Dharageswari R <dharageswari.r@intel.com>"); -MODULE_AUTHOR("KP Jeeja <jeeja.kp@intel.com>"); -MODULE_DESCRIPTION("Intel (R) SST(R) Audio Engine Driver"); -MODULE_LICENSE("GPL v2"); -MODULE_VERSION(SST_DRIVER_VERSION); - -struct intel_sst_drv *sst_drv_ctx; -static struct mutex drv_ctx_lock; -struct class *sst_class; - -/* fops Routines */ -static const struct file_operations intel_sst_fops = { - .owner = THIS_MODULE, - .open = intel_sst_open, - .release = intel_sst_release, - .read = intel_sst_read, - .write = intel_sst_write, - .unlocked_ioctl = intel_sst_ioctl, - .mmap = intel_sst_mmap, - .aio_read = intel_sst_aio_read, - .aio_write = intel_sst_aio_write, -}; -static const struct file_operations intel_sst_fops_cntrl = { - .owner = THIS_MODULE, - .open = intel_sst_open_cntrl, - .release = intel_sst_release_cntrl, - .unlocked_ioctl = intel_sst_ioctl, -}; - -static struct miscdevice lpe_dev = { - .minor = MISC_DYNAMIC_MINOR,/* dynamic allocation */ - .name = "intel_sst",/* /dev/intel_sst */ - .fops = &intel_sst_fops -}; - - -static struct miscdevice lpe_ctrl = { - .minor = MISC_DYNAMIC_MINOR,/* dynamic allocation */ - .name = "intel_sst_ctrl",/* /dev/intel_sst_ctrl */ - .fops = &intel_sst_fops_cntrl -}; - -/** -* intel_sst_interrupt - Interrupt service routine for SST -* -* @irq: irq number of interrupt -* @context: pointer to device structre -* -* This function is called by OS when SST device raises -* an interrupt. This will be result of write in IPC register -* Source can be busy or done interrupt -*/ -static irqreturn_t intel_sst_interrupt(int irq, void *context) -{ - union interrupt_reg isr; - union ipc_header header; - union interrupt_reg imr; - struct intel_sst_drv *drv = (struct intel_sst_drv *) context; - unsigned int size = 0, str_id; - struct stream_info *stream ; - - /* Do not handle interrupt in suspended state */ - if (drv->sst_state == SST_SUSPENDED) - return IRQ_NONE; - /* Interrupt arrived, check src */ - isr.full = sst_shim_read(drv->shim, SST_ISRX); - - if (isr.part.busy_interrupt) { - header.full = sst_shim_read(drv->shim, SST_IPCD); - if (header.part.msg_id == IPC_SST_PERIOD_ELAPSED) { - sst_clear_interrupt(); - str_id = header.part.str_id; - stream = &sst_drv_ctx->streams[str_id]; - if (stream->period_elapsed) - stream->period_elapsed(stream->pcm_substream); - return IRQ_HANDLED; - } - if (header.part.large) - size = header.part.data; - if (header.part.msg_id & REPLY_MSG) { - sst_drv_ctx->ipc_process_msg.header = header; - memcpy_fromio(sst_drv_ctx->ipc_process_msg.mailbox, - drv->mailbox + SST_MAILBOX_RCV, size); - queue_work(sst_drv_ctx->process_msg_wq, - &sst_drv_ctx->ipc_process_msg.wq); - } else { - sst_drv_ctx->ipc_process_reply.header = header; - memcpy_fromio(sst_drv_ctx->ipc_process_reply.mailbox, - drv->mailbox + SST_MAILBOX_RCV, size); - queue_work(sst_drv_ctx->process_reply_wq, - &sst_drv_ctx->ipc_process_reply.wq); - } - /* mask busy inetrrupt */ - imr.full = sst_shim_read(drv->shim, SST_IMRX); - imr.part.busy_interrupt = 1; - sst_shim_write(sst_drv_ctx->shim, SST_IMRX, imr.full); - return IRQ_HANDLED; - } else if (isr.part.done_interrupt) { - /* Clear done bit */ - header.full = sst_shim_read(drv->shim, SST_IPCX); - header.part.done = 0; - sst_shim_write(sst_drv_ctx->shim, SST_IPCX, header.full); - /* write 1 to clear status register */; - isr.part.done_interrupt = 1; - /* dummy register for shim workaround */ - sst_shim_write(sst_drv_ctx->shim, SST_ISRX, isr.full); - queue_work(sst_drv_ctx->post_msg_wq, - &sst_drv_ctx->ipc_post_msg.wq); - return IRQ_HANDLED; - } else - return IRQ_NONE; - -} - - -/* -* intel_sst_probe - PCI probe function -* -* @pci: PCI device structure -* @pci_id: PCI device ID structure -* -* This function is called by OS when a device is found -* This enables the device, interrupt etc -*/ -static int __devinit intel_sst_probe(struct pci_dev *pci, - const struct pci_device_id *pci_id) -{ - int i, ret = 0; - - pr_debug("Probe for DID %x\n", pci->device); - mutex_lock(&drv_ctx_lock); - if (sst_drv_ctx) { - pr_err("Only one sst handle is supported\n"); - mutex_unlock(&drv_ctx_lock); - return -EBUSY; - } - - sst_drv_ctx = kzalloc(sizeof(*sst_drv_ctx), GFP_KERNEL); - if (!sst_drv_ctx) { - pr_err("malloc fail\n"); - mutex_unlock(&drv_ctx_lock); - return -ENOMEM; - } - mutex_unlock(&drv_ctx_lock); - - sst_drv_ctx->pci_id = pci->device; - - mutex_init(&sst_drv_ctx->stream_lock); - mutex_init(&sst_drv_ctx->sst_lock); - sst_drv_ctx->pmic_state = SND_MAD_UN_INIT; - - sst_drv_ctx->stream_cnt = 0; - sst_drv_ctx->encoded_cnt = 0; - sst_drv_ctx->am_cnt = 0; - sst_drv_ctx->pb_streams = 0; - sst_drv_ctx->cp_streams = 0; - sst_drv_ctx->unique_id = 0; - sst_drv_ctx->pmic_port_instance = SST_DEFAULT_PMIC_PORT; - - INIT_LIST_HEAD(&sst_drv_ctx->ipc_dispatch_list); - INIT_WORK(&sst_drv_ctx->ipc_post_msg.wq, sst_post_message); - INIT_WORK(&sst_drv_ctx->ipc_process_msg.wq, sst_process_message); - INIT_WORK(&sst_drv_ctx->ipc_process_reply.wq, sst_process_reply); - INIT_WORK(&sst_drv_ctx->mad_ops.wq, sst_process_mad_ops); - init_waitqueue_head(&sst_drv_ctx->wait_queue); - - sst_drv_ctx->mad_wq = create_workqueue("sst_mad_wq"); - if (!sst_drv_ctx->mad_wq) - goto do_free_drv_ctx; - sst_drv_ctx->post_msg_wq = create_workqueue("sst_post_msg_wq"); - if (!sst_drv_ctx->post_msg_wq) - goto free_mad_wq; - sst_drv_ctx->process_msg_wq = create_workqueue("sst_process_msg_wqq"); - if (!sst_drv_ctx->process_msg_wq) - goto free_post_msg_wq; - sst_drv_ctx->process_reply_wq = create_workqueue("sst_proces_reply_wq"); - if (!sst_drv_ctx->process_reply_wq) - goto free_process_msg_wq; - - for (i = 0; i < MAX_ACTIVE_STREAM; i++) { - sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT; - sst_drv_ctx->alloc_block[i].ops_block.condition = false; - } - spin_lock_init(&sst_drv_ctx->list_spin_lock); - - sst_drv_ctx->max_streams = pci_id->driver_data; - pr_debug("Got drv data max stream %d\n", - sst_drv_ctx->max_streams); - for (i = 1; i <= sst_drv_ctx->max_streams; i++) { - struct stream_info *stream = &sst_drv_ctx->streams[i]; - INIT_LIST_HEAD(&stream->bufs); - mutex_init(&stream->lock); - spin_lock_init(&stream->pcm_lock); - } - if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) { - sst_drv_ctx->mmap_mem = NULL; - sst_drv_ctx->mmap_len = SST_MMAP_PAGES * PAGE_SIZE; - while (sst_drv_ctx->mmap_len > 0) { - sst_drv_ctx->mmap_mem = - kzalloc(sst_drv_ctx->mmap_len, GFP_KERNEL); - if (sst_drv_ctx->mmap_mem) { - pr_debug("Got memory %p size 0x%x\n", - sst_drv_ctx->mmap_mem, - sst_drv_ctx->mmap_len); - break; - } - if (sst_drv_ctx->mmap_len < (SST_MMAP_STEP*PAGE_SIZE)) { - pr_err("mem alloc fail...abort!!\n"); - ret = -ENOMEM; - goto free_process_reply_wq; - } - sst_drv_ctx->mmap_len -= (SST_MMAP_STEP * PAGE_SIZE); - pr_debug("mem alloc failed...trying %d\n", - sst_drv_ctx->mmap_len); - } - } - - /* Init the device */ - ret = pci_enable_device(pci); - if (ret) { - pr_err("device can't be enabled\n"); - goto do_free_mem; - } - sst_drv_ctx->pci = pci_dev_get(pci); - ret = pci_request_regions(pci, SST_DRV_NAME); - if (ret) - goto do_disable_device; - /* map registers */ - /* SST Shim */ - sst_drv_ctx->shim_phy_add = pci_resource_start(pci, 1); - sst_drv_ctx->shim = pci_ioremap_bar(pci, 1); - if (!sst_drv_ctx->shim) - goto do_release_regions; - pr_debug("SST Shim Ptr %p\n", sst_drv_ctx->shim); - - /* Shared SRAM */ - sst_drv_ctx->mailbox = pci_ioremap_bar(pci, 2); - if (!sst_drv_ctx->mailbox) - goto do_unmap_shim; - pr_debug("SRAM Ptr %p\n", sst_drv_ctx->mailbox); - - /* IRAM */ - sst_drv_ctx->iram = pci_ioremap_bar(pci, 3); - if (!sst_drv_ctx->iram) - goto do_unmap_sram; - pr_debug("IRAM Ptr %p\n", sst_drv_ctx->iram); - - /* DRAM */ - sst_drv_ctx->dram = pci_ioremap_bar(pci, 4); - if (!sst_drv_ctx->dram) - goto do_unmap_iram; - pr_debug("DRAM Ptr %p\n", sst_drv_ctx->dram); - - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_UN_INIT; - mutex_unlock(&sst_drv_ctx->sst_lock); - /* Register the ISR */ - ret = request_irq(pci->irq, intel_sst_interrupt, - IRQF_SHARED, SST_DRV_NAME, sst_drv_ctx); - if (ret) - goto do_unmap_dram; - pr_debug("Registered IRQ 0x%x\n", pci->irq); - - /*Register LPE Control as misc driver*/ - ret = misc_register(&lpe_ctrl); - if (ret) { - pr_err("couldn't register control device\n"); - goto do_free_irq; - } - - if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) { - ret = misc_register(&lpe_dev); - if (ret) { - pr_err("couldn't register LPE device\n"); - goto do_free_misc; - } - } else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID) { - u32 csr; - - /*allocate mem for fw context save during suspend*/ - sst_drv_ctx->fw_cntx = kzalloc(FW_CONTEXT_MEM, GFP_KERNEL); - if (!sst_drv_ctx->fw_cntx) { - ret = -ENOMEM; - goto do_free_misc; - } - /*setting zero as that is valid mem to restore*/ - sst_drv_ctx->fw_cntx_size = 0; - - /*set lpe start clock and ram size*/ - csr = sst_shim_read(sst_drv_ctx->shim, SST_CSR); - csr |= 0x30060; /*remove the clock ratio after fw fix*/ - sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr); - } - sst_drv_ctx->lpe_stalled = 0; - pci_set_drvdata(pci, sst_drv_ctx); - pm_runtime_allow(&pci->dev); - pm_runtime_put_noidle(&pci->dev); - pr_debug("...successfully done!!!\n"); - return ret; - -do_free_misc: - misc_deregister(&lpe_ctrl); -do_free_irq: - free_irq(pci->irq, sst_drv_ctx); -do_unmap_dram: - iounmap(sst_drv_ctx->dram); -do_unmap_iram: - iounmap(sst_drv_ctx->iram); -do_unmap_sram: - iounmap(sst_drv_ctx->mailbox); -do_unmap_shim: - iounmap(sst_drv_ctx->shim); -do_release_regions: - pci_release_regions(pci); -do_disable_device: - pci_disable_device(pci); -do_free_mem: - kfree(sst_drv_ctx->mmap_mem); -free_process_reply_wq: - destroy_workqueue(sst_drv_ctx->process_reply_wq); -free_process_msg_wq: - destroy_workqueue(sst_drv_ctx->process_msg_wq); -free_post_msg_wq: - destroy_workqueue(sst_drv_ctx->post_msg_wq); -free_mad_wq: - destroy_workqueue(sst_drv_ctx->mad_wq); -do_free_drv_ctx: - kfree(sst_drv_ctx); - sst_drv_ctx = NULL; - pr_err("Probe failed with %d\n", ret); - return ret; -} - -/** -* intel_sst_remove - PCI remove function -* -* @pci: PCI device structure -* -* This function is called by OS when a device is unloaded -* This frees the interrupt etc -*/ -static void __devexit intel_sst_remove(struct pci_dev *pci) -{ - pm_runtime_get_noresume(&pci->dev); - pm_runtime_forbid(&pci->dev); - pci_dev_put(sst_drv_ctx->pci); - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_UN_INIT; - mutex_unlock(&sst_drv_ctx->sst_lock); - misc_deregister(&lpe_ctrl); - free_irq(pci->irq, sst_drv_ctx); - iounmap(sst_drv_ctx->dram); - iounmap(sst_drv_ctx->iram); - iounmap(sst_drv_ctx->mailbox); - iounmap(sst_drv_ctx->shim); - sst_drv_ctx->pmic_state = SND_MAD_UN_INIT; - if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID) { - misc_deregister(&lpe_dev); - kfree(sst_drv_ctx->mmap_mem); - } else - kfree(sst_drv_ctx->fw_cntx); - flush_scheduled_work(); - destroy_workqueue(sst_drv_ctx->process_reply_wq); - destroy_workqueue(sst_drv_ctx->process_msg_wq); - destroy_workqueue(sst_drv_ctx->post_msg_wq); - destroy_workqueue(sst_drv_ctx->mad_wq); - kfree(pci_get_drvdata(pci)); - sst_drv_ctx = NULL; - pci_release_regions(pci); - pci_disable_device(pci); - pci_set_drvdata(pci, NULL); -} - -void sst_save_dsp_context(void) -{ - struct snd_sst_ctxt_params fw_context; - unsigned int pvt_id, i; - struct ipc_post *msg = NULL; - - /*check cpu type*/ - if (sst_drv_ctx->pci_id != SST_MFLD_PCI_ID) - return; - /*not supported for rest*/ - if (sst_drv_ctx->sst_state != SST_FW_RUNNING) { - pr_debug("fw not running no context save ...\n"); - return; - } - - /*send msg to fw*/ - if (sst_create_large_msg(&msg)) - return; - pvt_id = sst_assign_pvt_id(sst_drv_ctx); - i = sst_get_block_stream(sst_drv_ctx); - sst_drv_ctx->alloc_block[i].sst_id = pvt_id; - sst_fill_header(&msg->header, IPC_IA_GET_FW_CTXT, 1, pvt_id); - msg->header.part.data = sizeof(fw_context) + sizeof(u32); - fw_context.address = virt_to_phys((void *)sst_drv_ctx->fw_cntx); - fw_context.size = FW_CONTEXT_MEM; - memcpy(msg->mailbox_data, &msg->header, sizeof(u32)); - memcpy(msg->mailbox_data + sizeof(u32), - &fw_context, sizeof(fw_context)); - spin_lock(&sst_drv_ctx->list_spin_lock); - list_add_tail(&msg->node, &sst_drv_ctx->ipc_dispatch_list); - spin_unlock(&sst_drv_ctx->list_spin_lock); - sst_post_message(&sst_drv_ctx->ipc_post_msg_wq); - /*wait for reply*/ - if (sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i])) - pr_debug("err fw context save timeout ...\n"); - sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT; - pr_debug("fw context saved ...\n"); - return; -} - -/* Power Management */ -/* -* intel_sst_suspend - PCI suspend function -* -* @pci: PCI device structure -* @state: PM message -* -* This function is called by OS when a power event occurs -*/ -int intel_sst_suspend(struct pci_dev *pci, pm_message_t state) -{ - union config_status_reg csr; - - pr_debug("intel_sst_suspend called\n"); - - if (sst_drv_ctx->stream_cnt) { - pr_err("active streams,not able to suspend\n"); - return -EBUSY; - } - /*save fw context*/ - sst_save_dsp_context(); - /*Assert RESET on LPE Processor*/ - csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR); - csr.full = csr.full | 0x2; - /* Move the SST state to Suspended */ - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_SUSPENDED; - sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full); - mutex_unlock(&sst_drv_ctx->sst_lock); - pci_set_drvdata(pci, sst_drv_ctx); - pci_save_state(pci); - pci_disable_device(pci); - pci_set_power_state(pci, PCI_D3hot); - return 0; -} - -/** -* intel_sst_resume - PCI resume function -* -* @pci: PCI device structure -* -* This function is called by OS when a power event occurs -*/ -int intel_sst_resume(struct pci_dev *pci) -{ - int ret = 0; - - pr_debug("intel_sst_resume called\n"); - if (sst_drv_ctx->sst_state != SST_SUSPENDED) { - pr_err("SST is not in suspended state\n"); - return 0; - } - sst_drv_ctx = pci_get_drvdata(pci); - pci_set_power_state(pci, PCI_D0); - pci_restore_state(pci); - ret = pci_enable_device(pci); - if (ret) - pr_err("device can't be enabled\n"); - - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_UN_INIT; - mutex_unlock(&sst_drv_ctx->sst_lock); - return 0; -} - -/* The runtime_suspend/resume is pretty much similar to the legacy - * suspend/resume with the noted exception below: - * The PCI core takes care of taking the system through D3hot and - * restoring it back to D0 and so there is no need to duplicate - * that here. - */ -static int intel_sst_runtime_suspend(struct device *dev) -{ - union config_status_reg csr; - - pr_debug("intel_sst_runtime_suspend called\n"); - if (sst_drv_ctx->stream_cnt) { - pr_err("active streams,not able to suspend\n"); - return -EBUSY; - } - /*save fw context*/ - sst_save_dsp_context(); - /*Assert RESET on LPE Processor*/ - csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR); - csr.full = csr.full | 0x2; - /* Move the SST state to Suspended */ - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_SUSPENDED; - - /* Only needed by Medfield */ - if (sst_drv_ctx->pci_id != SST_MRST_PCI_ID) - sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full); - mutex_unlock(&sst_drv_ctx->sst_lock); - return 0; -} - -static int intel_sst_runtime_resume(struct device *dev) -{ - - pr_debug("intel_sst_runtime_resume called\n"); - if (sst_drv_ctx->sst_state != SST_SUSPENDED) { - pr_err("SST is not in suspended state\n"); - return 0; - } - - mutex_lock(&sst_drv_ctx->sst_lock); - sst_drv_ctx->sst_state = SST_UN_INIT; - mutex_unlock(&sst_drv_ctx->sst_lock); - return 0; -} - -static int intel_sst_runtime_idle(struct device *dev) -{ - pr_debug("runtime_idle called\n"); - if (sst_drv_ctx->stream_cnt == 0 && sst_drv_ctx->am_cnt == 0) - pm_schedule_suspend(dev, SST_SUSPEND_DELAY); - return -EBUSY; -} - -static const struct dev_pm_ops intel_sst_pm = { - .runtime_suspend = intel_sst_runtime_suspend, - .runtime_resume = intel_sst_runtime_resume, - .runtime_idle = intel_sst_runtime_idle, -}; - -/* PCI Routines */ -static struct pci_device_id intel_sst_ids[] = { - { PCI_VDEVICE(INTEL, SST_MRST_PCI_ID), 3}, - { PCI_VDEVICE(INTEL, SST_MFLD_PCI_ID), 6}, - { 0, } -}; -MODULE_DEVICE_TABLE(pci, intel_sst_ids); - -static struct pci_driver driver = { - .name = SST_DRV_NAME, - .id_table = intel_sst_ids, - .probe = intel_sst_probe, - .remove = __devexit_p(intel_sst_remove), -#ifdef CONFIG_PM - .suspend = intel_sst_suspend, - .resume = intel_sst_resume, - .driver = { - .pm = &intel_sst_pm, - }, -#endif -}; - -/** -* intel_sst_init - Module init function -* -* Registers with PCI -* Registers with /dev -* Init all data strutures -*/ -static int __init intel_sst_init(void) -{ - /* Init all variables, data structure etc....*/ - int ret = 0; - pr_debug("INFO: ******** SST DRIVER loading.. Ver: %s\n", - SST_DRIVER_VERSION); - - mutex_init(&drv_ctx_lock); - /* Register with PCI */ - ret = pci_register_driver(&driver); - if (ret) - pr_err("PCI register failed\n"); - return ret; -} - -/** -* intel_sst_exit - Module exit function -* -* Unregisters with PCI -* Unregisters with /dev -* Frees all data strutures -*/ -static void __exit intel_sst_exit(void) -{ - pci_unregister_driver(&driver); - - pr_debug("driver unloaded\n"); - sst_drv_ctx = NULL; - return; -} - -module_init(intel_sst_init); -module_exit(intel_sst_exit); |