1 files changed, 463 insertions, 0 deletions

diff --git a/sound/soc/intel/atom/sst/sst_loader.c b/sound/soc/intel/atom/sst/sst_loader.c
new file mode 100644
index 000000000000..33917146d9c4
--- /dev/null
+++ b/sound/soc/intel/atom/sst/sst_loader.c
@@ -0,0 +1,463 @@
+/*
+ *  sst_dsp.c - Intel SST Driver for audio engine
+ *
+ *  Copyright (C) 2008-14       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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This file contains all dsp controlling functions like firmware download,
+ * setting/resetting dsp cores, etc
+ */
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/firmware.h>
+#include <linux/dmaengine.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_qos.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/compress_driver.h>
+#include <asm/platform_sst_audio.h>
+#include "../sst-mfld-platform.h"
+#include "sst.h"
+#include "../../common/sst-dsp.h"
+
+void memcpy32_toio(void __iomem *dst, const void *src, int count)
+{
+        /* __iowrite32_copy uses 32-bit count values so divide by 4 for
+         * right count in words
+         */
+        __iowrite32_copy(dst, src, count/4);
+}
+
+void memcpy32_fromio(void *dst, const void __iomem *src, int count)
+{
+        /* __iowrite32_copy uses 32-bit count values so divide by 4 for
+         * right count in words
+         */
+        __iowrite32_copy(dst, src, count/4);
+}
+
+/**
+ * intel_sst_reset_dsp_mrfld - Resetting SST DSP
+ *
+ * This resets DSP in case of MRFLD platfroms
+ */
+int intel_sst_reset_dsp_mrfld(struct intel_sst_drv *sst_drv_ctx)
+{
+        union config_status_reg_mrfld csr;
+
+        dev_dbg(sst_drv_ctx->dev, "sst: Resetting the DSP in mrfld\n");
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+
+        dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
+
+        csr.full |= 0x7;
+        sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+
+        dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
+
+        csr.full &= ~(0x1);
+        sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+        dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
+        return 0;
+}
+
+/**
+ * sst_start_merrifield - Start the SST DSP processor
+ *
+ * This starts the DSP in MERRIFIELD platfroms
+ */
+int sst_start_mrfld(struct intel_sst_drv *sst_drv_ctx)
+{
+        union config_status_reg_mrfld csr;
+
+        dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP in mrfld LALALALA\n");
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+        dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
+
+        csr.full |= 0x7;
+        sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+        dev_dbg(sst_drv_ctx->dev, "value:0x%llx\n", csr.full);
+
+        csr.part.xt_snoop = 1;
+        csr.full &= ~(0x5);
+        sst_shim_write64(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+        csr.full = sst_shim_read64(sst_drv_ctx->shim, SST_CSR);
+        dev_dbg(sst_drv_ctx->dev, "sst: Starting the DSP_merrifield:%llx\n",
+                        csr.full);
+        return 0;
+}
+
+static int sst_validate_fw_image(struct intel_sst_drv *ctx, unsigned long size,
+                struct fw_module_header **module, u32 *num_modules)
+{
+        struct sst_fw_header *header;
+        const void *sst_fw_in_mem = ctx->fw_in_mem;
+
+        dev_dbg(ctx->dev, "Enter\n");
+
+        /* Read the header information from the data pointer */
+        header = (struct sst_fw_header *)sst_fw_in_mem;
+        dev_dbg(ctx->dev,
+                "header sign=%s size=%x modules=%x fmt=%x size=%zx\n",
+                header->signature, header->file_size, header->modules,
+                header->file_format, sizeof(*header));
+
+        /* verify FW */
+        if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
+                (size != header->file_size + sizeof(*header))) {
+                /* Invalid FW signature */
+                dev_err(ctx->dev, "InvalidFW sign/filesize mismatch\n");
+                return -EINVAL;
+        }
+        *num_modules = header->modules;
+        *module = (void *)sst_fw_in_mem + sizeof(*header);
+
+        return 0;
+}
+
+/*
+ * sst_fill_memcpy_list - Fill the memcpy list
+ *
+ * @memcpy_list: List to be filled
+ * @destn: Destination addr to be filled in the list
+ * @src: Source addr to be filled in the list
+ * @size: Size to be filled in the list
+ *
+ * Adds the node to the list after required fields
+ * are populated in the node
+ */
+static int sst_fill_memcpy_list(struct list_head *memcpy_list,
+                        void *destn, const void *src, u32 size, bool is_io)
+{
+        struct sst_memcpy_list *listnode;
+
+        listnode = kzalloc(sizeof(*listnode), GFP_KERNEL);
+        if (listnode == NULL)
+                return -ENOMEM;
+        listnode->dstn = destn;
+        listnode->src = src;
+        listnode->size = size;
+        listnode->is_io = is_io;
+        list_add_tail(&listnode->memcpylist, memcpy_list);
+
+        return 0;
+}
+
+/**
+ * sst_parse_module_memcpy - Parse audio FW modules and populate the memcpy list
+ *
+ * @sst_drv_ctx         : driver context
+ * @module              : FW module header
+ * @memcpy_list : Pointer to the list to be populated
+ * Create the memcpy list as the number of block to be copied
+ * returns error or 0 if module sizes are proper
+ */
+static int sst_parse_module_memcpy(struct intel_sst_drv *sst_drv_ctx,
+                struct fw_module_header *module, struct list_head *memcpy_list)
+{
+        struct fw_block_info *block;
+        u32 count;
+        int ret_val = 0;
+        void __iomem *ram_iomem;
+
+        dev_dbg(sst_drv_ctx->dev, "module sign %s size %x blocks %x type %x\n",
+                        module->signature, module->mod_size,
+                        module->blocks, module->type);
+        dev_dbg(sst_drv_ctx->dev, "module entrypoint 0x%x\n", module->entry_point);
+
+        block = (void *)module + sizeof(*module);
+
+        for (count = 0; count < module->blocks; count++) {
+                if (block->size <= 0) {
+                        dev_err(sst_drv_ctx->dev, "block size invalid\n");
+                        return -EINVAL;
+                }
+                switch (block->type) {
+                case SST_IRAM:
+                        ram_iomem = sst_drv_ctx->iram;
+                        break;
+                case SST_DRAM:
+                        ram_iomem = sst_drv_ctx->dram;
+                        break;
+                case SST_DDR:
+                        ram_iomem = sst_drv_ctx->ddr;
+                        break;
+                case SST_CUSTOM_INFO:
+                        block = (void *)block + sizeof(*block) + block->size;
+                        continue;
+                default:
+                        dev_err(sst_drv_ctx->dev, "wrong ram type0x%x in block0x%x\n",
+                                        block->type, count);
+                        return -EINVAL;
+                }
+
+                ret_val = sst_fill_memcpy_list(memcpy_list,
+                                ram_iomem + block->ram_offset,
+                                (void *)block + sizeof(*block), block->size, 1);
+                if (ret_val)
+                        return ret_val;
+
+                block = (void *)block + sizeof(*block) + block->size;
+        }
+        return 0;
+}
+
+/**
+ * sst_parse_fw_memcpy - parse the firmware image & populate the list for memcpy
+ *
+ * @ctx                 : pointer to drv context
+ * @size                : size of the firmware
+ * @fw_list             : pointer to list_head to be populated
+ * This function parses the FW image and saves the parsed image in the list
+ * for memcpy
+ */
+static int sst_parse_fw_memcpy(struct intel_sst_drv *ctx, unsigned long size,
+                                struct list_head *fw_list)
+{
+        struct fw_module_header *module;
+        u32 count, num_modules;
+        int ret_val;
+
+        ret_val = sst_validate_fw_image(ctx, size, &module, &num_modules);
+        if (ret_val)
+                return ret_val;
+
+        for (count = 0; count < num_modules; count++) {
+                ret_val = sst_parse_module_memcpy(ctx, module, fw_list);
+                if (ret_val)
+                        return ret_val;
+                module = (void *)module + sizeof(*module) + module->mod_size;
+        }
+
+        return 0;
+}
+
+/**
+ * sst_do_memcpy - function initiates the memcpy
+ *
+ * @memcpy_list: Pter to memcpy list on which the memcpy needs to be initiated
+ *
+ * Triggers the memcpy
+ */
+static void sst_do_memcpy(struct list_head *memcpy_list)
+{
+        struct sst_memcpy_list *listnode;
+
+        list_for_each_entry(listnode, memcpy_list, memcpylist) {
+                if (listnode->is_io == true)
+                        memcpy32_toio((void __iomem *)listnode->dstn,
+                                        listnode->src, listnode->size);
+                else
+                        memcpy(listnode->dstn, listnode->src, listnode->size);
+        }
+}
+
+void sst_memcpy_free_resources(struct intel_sst_drv *sst_drv_ctx)
+{
+        struct sst_memcpy_list *listnode, *tmplistnode;
+
+        /* Free the list */
+        if (!list_empty(&sst_drv_ctx->memcpy_list)) {
+                list_for_each_entry_safe(listnode, tmplistnode,
+                                &sst_drv_ctx->memcpy_list, memcpylist) {
+                        list_del(&listnode->memcpylist);
+                        kfree(listnode);
+                }
+        }
+}
+
+static int sst_cache_and_parse_fw(struct intel_sst_drv *sst,
+                const struct firmware *fw)
+{
+        int retval = 0;
+
+        sst->fw_in_mem = kzalloc(fw->size, GFP_KERNEL);
+        if (!sst->fw_in_mem) {
+                retval = -ENOMEM;
+                goto end_release;
+        }
+        dev_dbg(sst->dev, "copied fw to %p", sst->fw_in_mem);
+        dev_dbg(sst->dev, "phys: %lx", (unsigned long)virt_to_phys(sst->fw_in_mem));
+        memcpy(sst->fw_in_mem, fw->data, fw->size);
+        retval = sst_parse_fw_memcpy(sst, fw->size, &sst->memcpy_list);
+        if (retval) {
+                dev_err(sst->dev, "Failed to parse fw\n");
+                kfree(sst->fw_in_mem);
+                sst->fw_in_mem = NULL;
+        }
+
+end_release:
+        release_firmware(fw);
+        return retval;
+
+}
+
+void sst_firmware_load_cb(const struct firmware *fw, void *context)
+{
+        struct intel_sst_drv *ctx = context;
+
+        dev_dbg(ctx->dev, "Enter\n");
+
+        if (fw == NULL) {
+                dev_err(ctx->dev, "request fw failed\n");
+                return;
+        }
+
+        mutex_lock(&ctx->sst_lock);
+
+        if (ctx->sst_state != SST_RESET ||
+                        ctx->fw_in_mem != NULL) {
+                release_firmware(fw);
+                mutex_unlock(&ctx->sst_lock);
+                return;
+        }
+
+        dev_dbg(ctx->dev, "Request Fw completed\n");
+        sst_cache_and_parse_fw(ctx, fw);
+        mutex_unlock(&ctx->sst_lock);
+}
+
+/*
+ * sst_request_fw - requests audio fw from kernel and saves a copy
+ *
+ * This function requests the SST FW from the kernel, parses it and
+ * saves a copy in the driver context
+ */
+static int sst_request_fw(struct intel_sst_drv *sst)
+{
+        int retval = 0;
+        const struct firmware *fw;
+
+        retval = request_firmware(&fw, sst->firmware_name, sst->dev);
+        if (fw == NULL) {
+                dev_err(sst->dev, "fw is returning as null\n");
+                return -EINVAL;
+        }
+        if (retval) {
+                dev_err(sst->dev, "request fw failed %d\n", retval);
+                return retval;
+        }
+        mutex_lock(&sst->sst_lock);
+        retval = sst_cache_and_parse_fw(sst, fw);
+        mutex_unlock(&sst->sst_lock);
+
+        return retval;
+}
+
+/*
+ * Writing the DDR physical base to DCCM offset
+ * so that FW can use it to setup TLB
+ */
+static void sst_dccm_config_write(void __iomem *dram_base,
+                unsigned int ddr_base)
+{
+        void __iomem *addr;
+        u32 bss_reset = 0;
+
+        addr = (void __iomem *)(dram_base + MRFLD_FW_DDR_BASE_OFFSET);
+        memcpy32_toio(addr, (void *)&ddr_base, sizeof(u32));
+        bss_reset |= (1 << MRFLD_FW_BSS_RESET_BIT);
+        addr = (void __iomem *)(dram_base + MRFLD_FW_FEATURE_BASE_OFFSET);
+        memcpy32_toio(addr, &bss_reset, sizeof(u32));
+
+}
+
+void sst_post_download_mrfld(struct intel_sst_drv *ctx)
+{
+        sst_dccm_config_write(ctx->dram, ctx->ddr_base);
+        dev_dbg(ctx->dev, "config written to DCCM\n");
+}
+
+/**
+ * sst_load_fw - function to load FW into DSP
+ * Transfers the FW to DSP using dma/memcpy
+ */
+int sst_load_fw(struct intel_sst_drv *sst_drv_ctx)
+{
+        int ret_val = 0;
+        struct sst_block *block;
+
+        dev_dbg(sst_drv_ctx->dev, "sst_load_fw\n");
+
+        if (sst_drv_ctx->sst_state !=  SST_RESET ||
+                        sst_drv_ctx->sst_state == SST_SHUTDOWN)
+                return -EAGAIN;
+
+        if (!sst_drv_ctx->fw_in_mem) {
+                dev_dbg(sst_drv_ctx->dev, "sst: FW not in memory retry to download\n");
+                ret_val = sst_request_fw(sst_drv_ctx);
+                if (ret_val)
+                        return ret_val;
+        }
+
+        BUG_ON(!sst_drv_ctx->fw_in_mem);
+        block = sst_create_block(sst_drv_ctx, 0, FW_DWNL_ID);
+        if (block == NULL)
+                return -ENOMEM;
+
+        /* Prevent C-states beyond C6 */
+        pm_qos_update_request(sst_drv_ctx->qos, 0);
+
+        sst_drv_ctx->sst_state = SST_FW_LOADING;
+
+        ret_val = sst_drv_ctx->ops->reset(sst_drv_ctx);
+        if (ret_val)
+                goto restore;
+
+        sst_do_memcpy(&sst_drv_ctx->memcpy_list);
+
+        /* Write the DRAM/DCCM config before enabling FW */
+        if (sst_drv_ctx->ops->post_download)
+                sst_drv_ctx->ops->post_download(sst_drv_ctx);
+
+        /* bring sst out of reset */
+        ret_val = sst_drv_ctx->ops->start(sst_drv_ctx);
+        if (ret_val)
+                goto restore;
+
+        ret_val = sst_wait_timeout(sst_drv_ctx, block);
+        if (ret_val) {
+                dev_err(sst_drv_ctx->dev, "fw download failed %d\n" , ret_val);
+                /* FW download failed due to timeout */
+                ret_val = -EBUSY;
+
+        }
+
+
+restore:
+        /* Re-enable Deeper C-states beyond C6 */
+        pm_qos_update_request(sst_drv_ctx->qos, PM_QOS_DEFAULT_VALUE);
+        sst_free_block(sst_drv_ctx, block);
+        dev_dbg(sst_drv_ctx->dev, "fw load successful!!!\n");
+
+        if (sst_drv_ctx->ops->restore_dsp_context)
+                sst_drv_ctx->ops->restore_dsp_context();
+        sst_drv_ctx->sst_state = SST_FW_RUNNING;
+        return ret_val;
+}
+