1 files changed, 486 insertions, 0 deletions

diff --git a/drivers/staging/intel_sst/intel_sst_dsp.c b/drivers/staging/intel_sst/intel_sst_dsp.c
new file mode 100644
index 0000000..d80a6ee
--- /dev/null
+++ b/drivers/staging/intel_sst/intel_sst_dsp.c
@@ -0,0 +1,486 @@
+/*
+ *  intel_sst_dsp.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 dsp controlling functions like firmware download,
+ * setting/resetting dsp cores, etc
+ */
+#include <linux/pci.h>
+#include <linux/fs.h>
+#include <linux/firmware.h>
+#include "intel_sst.h"
+#include "intel_sst_ioctl.h"
+#include "intel_sst_fw_ipc.h"
+#include "intel_sst_common.h"
+
+
+/**
+ * intel_sst_reset_dsp_mrst - Resetting SST DSP
+ *
+ * This resets DSP in case of MRST platfroms
+ */
+static int intel_sst_reset_dsp_mrst(void)
+{
+	union config_status_reg csr;
+
+	pr_debug("sst: Resetting the DSP in mrst\n");
+	csr.full = 0x3a2;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+	csr.part.strb_cntr_rst = 0;
+	csr.part.run_stall = 0x1;
+	csr.part.bypass = 0x7;
+	csr.part.sst_reset = 0x1;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	return 0;
+}
+
+/**
+ * intel_sst_reset_dsp_medfield - Resetting SST DSP
+ *
+ * This resets DSP in case of Medfield platfroms
+ */
+static int intel_sst_reset_dsp_medfield(void)
+{
+	union config_status_reg csr;
+
+	pr_debug("sst: Resetting the DSP in medfield\n");
+	csr.full = 0x048303E2;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	return 0;
+}
+
+/**
+ * sst_start_mrst - Start the SST DSP processor
+ *
+ * This starts the DSP in MRST platfroms
+ */
+static int sst_start_mrst(void)
+{
+	union config_status_reg csr;
+
+	csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+	csr.part.bypass = 0;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	csr.part.run_stall = 0;
+	csr.part.sst_reset = 0;
+	csr.part.strb_cntr_rst = 1;
+	pr_debug("sst: Setting SST to execute_mrst 0x%x\n", csr.full);
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	return 0;
+}
+
+/**
+ * sst_start_medfield - Start the SST DSP processor
+ *
+ * This starts the DSP in MRST platfroms
+ */
+static int sst_start_medfield(void)
+{
+	union config_status_reg csr;
+
+	csr.full = 0x04830062;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	csr.full = 0x04830063;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	csr.full = 0x04830061;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+	pr_debug("sst: Starting the DSP_medfld\n");
+
+	return 0;
+}
+
+/**
+ * sst_parse_module - Parse audio FW modules
+ *
+ * @module: FW module header
+ *
+ * Parses modules that need to be placed in SST IRAM and DRAM
+ * returns error or 0 if module sizes are proper
+ */
+static int sst_parse_module(struct fw_module_header *module)
+{
+	struct dma_block_info *block;
+	u32 count;
+	void __iomem *ram;
+
+	pr_debug("sst: module sign %s size %x blocks %x type %x\n",
+			module->signature, module->mod_size,
+			module->blocks, module->type);
+	pr_debug("sst: module entrypoint 0x%x\n", module->entry_point);
+
+	block = (void *)module + sizeof(*module);
+
+	for (count = 0; count < module->blocks; count++) {
+		if (block->size <= 0) {
+			pr_err("sst: block size invalid\n");
+			return -EINVAL;
+		}
+		switch (block->type) {
+		case SST_IRAM:
+			ram = sst_drv_ctx->iram;
+			break;
+		case SST_DRAM:
+			ram = sst_drv_ctx->dram;
+			break;
+		default:
+			pr_err("sst: wrong ram type0x%x in block0x%x\n",
+					block->type, count);
+			return -EINVAL;
+		}
+		memcpy_toio(ram + block->ram_offset,
+				(void *)block + sizeof(*block), block->size);
+		block = (void *)block + sizeof(*block) + block->size;
+	}
+	return 0;
+}
+
+/**
+ * sst_parse_fw_image - parse and load FW
+ *
+ * @sst_fw: pointer to audio fw
+ *
+ * This function is called to parse and download the FW image
+ */
+static int sst_parse_fw_image(const struct firmware *sst_fw)
+{
+	struct fw_header *header;
+	u32 count;
+	int ret_val;
+	struct fw_module_header *module;
+
+	BUG_ON(!sst_fw);
+
+	/* Read the header information from the data pointer */
+	header = (struct fw_header *)sst_fw->data;
+
+	/* verify FW */
+	if ((strncmp(header->signature, SST_FW_SIGN, 4) != 0) ||
+			(sst_fw->size != header->file_size + sizeof(*header))) {
+		/* Invalid FW signature */
+		pr_err("sst: InvalidFW sign/filesize mismatch\n");
+		return -EINVAL;
+	}
+	pr_debug("sst: header sign=%s size=%x modules=%x fmt=%x size=%x\n",
+			header->signature, header->file_size, header->modules,
+			header->file_format, sizeof(*header));
+	module = (void *)sst_fw->data + sizeof(*header);
+	for (count = 0; count < header->modules; count++) {
+		/* module */
+		ret_val = sst_parse_module(module);
+		if (ret_val)
+			return ret_val;
+		module = (void *)module + sizeof(*module) + module->mod_size ;
+	}
+
+	return 0;
+}
+
+/**
+ * sst_load_fw - function to load FW into DSP
+ *
+ * @fw: Pointer to driver loaded FW
+ * @context: driver context
+ *
+ * This function is called by OS when the FW is loaded into kernel
+ */
+int sst_load_fw(const struct firmware *fw, void *context)
+{
+	int ret_val;
+
+	pr_debug("sst: load_fw called\n");
+	BUG_ON(!fw);
+
+	if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
+		ret_val = intel_sst_reset_dsp_mrst();
+	else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
+		ret_val = intel_sst_reset_dsp_medfield();
+	if (ret_val)
+		return ret_val;
+
+	ret_val = sst_parse_fw_image(fw);
+	if (ret_val)
+		return ret_val;
+	mutex_lock(&sst_drv_ctx->sst_lock);
+	sst_drv_ctx->sst_state = SST_FW_LOADED;
+	mutex_unlock(&sst_drv_ctx->sst_lock);
+	/*  7. ask scu to reset the bypass bits */
+	/*  8.bring sst out of reset  */
+	if (sst_drv_ctx->pci_id == SST_MRST_PCI_ID)
+		ret_val = sst_start_mrst();
+	else if (sst_drv_ctx->pci_id == SST_MFLD_PCI_ID)
+		ret_val = sst_start_medfield();
+	if (ret_val)
+		return ret_val;
+
+	pr_debug("sst: fw loaded successful!!!\n");
+	return ret_val;
+}
+
+/*This function is called when any codec/post processing library
+ needs to be downloaded*/
+static int sst_download_library(const struct firmware *fw_lib,
+				struct snd_sst_lib_download_info *lib)
+{
+	/* send IPC message and wait */
+	int i;
+	u8 pvt_id;
+	struct ipc_post *msg = NULL;
+	union config_status_reg csr;
+	struct snd_sst_str_type str_type = {0};
+	int retval = 0;
+
+	if (sst_create_large_msg(&msg))
+		return -ENOMEM;
+
+	pvt_id = sst_assign_pvt_id(sst_drv_ctx);
+	i = sst_get_block_stream(sst_drv_ctx);
+	pr_debug("sst: alloc block allocated = %d, pvt_id %d\n", i, pvt_id);
+	if (i < 0) {
+		kfree(msg);
+		return -ENOMEM;
+	}
+	sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
+	sst_fill_header(&msg->header, IPC_IA_PREP_LIB_DNLD, 1, pvt_id);
+	msg->header.part.data = sizeof(u32) + sizeof(str_type);
+	str_type.codec_type = lib->dload_lib.lib_info.lib_type;
+	/*str_type.pvt_id = pvt_id;*/
+	memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
+	memcpy(msg->mailbox_data + sizeof(u32), &str_type, sizeof(str_type));
+	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);
+	retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
+	if (retval) {
+		/* error */
+		sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+		pr_err("sst: Prep codec downloaded failed %d\n",
+				retval);
+		return -EIO;
+	}
+	pr_debug("sst: FW responded, ready for download now...\n");
+	/* downloading on success */
+	mutex_lock(&sst_drv_ctx->sst_lock);
+	sst_drv_ctx->sst_state = SST_FW_LOADED;
+	mutex_unlock(&sst_drv_ctx->sst_lock);
+	csr.full = readl(sst_drv_ctx->shim + SST_CSR);
+	csr.part.run_stall = 1;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+	csr.part.bypass = 0x7;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	sst_parse_fw_image(fw_lib);
+
+	/* set the FW to running again */
+	csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+	csr.part.bypass = 0x0;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
+	csr.part.run_stall = 0;
+	sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
+
+	/* send download complete and wait */
+	if (sst_create_large_msg(&msg)) {
+		sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+		return -ENOMEM;
+	}
+
+	sst_fill_header(&msg->header, IPC_IA_LIB_DNLD_CMPLT, 1, pvt_id);
+	sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
+	msg->header.part.data = sizeof(u32) + sizeof(*lib);
+	lib->pvt_id = pvt_id;
+	memcpy(msg->mailbox_data, &msg->header, sizeof(u32));
+	memcpy(msg->mailbox_data + sizeof(u32), lib, sizeof(*lib));
+	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);
+	pr_debug("sst: Waiting for FW response Download complete\n");
+	sst_drv_ctx->alloc_block[i].ops_block.condition = false;
+	retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[i]);
+	if (retval) {
+		/* error */
+		mutex_lock(&sst_drv_ctx->sst_lock);
+		sst_drv_ctx->sst_state = SST_UN_INIT;
+		mutex_unlock(&sst_drv_ctx->sst_lock);
+		sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+		return -EIO;
+	}
+
+	pr_debug("sst: FW sucess on Download complete\n");
+	sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+	mutex_lock(&sst_drv_ctx->sst_lock);
+	sst_drv_ctx->sst_state = SST_FW_RUNNING;
+	mutex_unlock(&sst_drv_ctx->sst_lock);
+	return 0;
+
+}
+
+/* This function is called befoer downloading the codec/postprocessing
+library is set for download to SST DSP*/
+static int sst_validate_library(const struct firmware *fw_lib,
+		struct lib_slot_info *slot,
+		u32 *entry_point)
+{
+	struct fw_header *header;
+	struct fw_module_header *module;
+	struct dma_block_info *block;
+	unsigned int n_blk, isize = 0, dsize = 0;
+	int err = 0;
+
+	header = (struct fw_header *)fw_lib->data;
+	if (header->modules != 1) {
+		pr_err("sst: Module no mismatch found\n ");
+		err = -EINVAL;
+		goto exit;
+	}
+	module = (void *)fw_lib->data + sizeof(*header);
+	*entry_point = module->entry_point;
+	pr_debug("sst: Module entry point 0x%x\n", *entry_point);
+	pr_debug("sst: Module Sign %s, Size 0x%x, Blocks 0x%x Type 0x%x\n",
+			module->signature, module->mod_size,
+			module->blocks, module->type);
+
+	block = (void *)module + sizeof(*module);
+	for (n_blk = 0; n_blk < module->blocks; n_blk++) {
+		switch (block->type) {
+		case SST_IRAM:
+			isize += block->size;
+			break;
+		case SST_DRAM:
+			dsize += block->size;
+			break;
+		default:
+			pr_err("sst: Invalid block type for 0x%x\n", n_blk);
+			err = -EINVAL;
+			goto exit;
+		}
+		block = (void *)block + sizeof(*block) + block->size;
+	}
+	if (isize > slot->iram_size || dsize > slot->dram_size) {
+		pr_err("sst: library exceeds size allocated\n");
+		err = -EINVAL;
+		goto exit;
+	} else
+		pr_debug("sst: Library is safe for download...\n");
+
+	pr_debug("sst: iram 0x%x, dram 0x%x, iram 0x%x, dram 0x%x\n",
+			isize, dsize, slot->iram_size, slot->dram_size);
+exit:
+	return err;
+
+}
+
+/* This function is called when FW requests for a particular libary download
+This function prepares the library to download*/
+int sst_load_library(struct snd_sst_lib_download *lib, u8 ops)
+{
+	char buf[20];
+	const char *type, *dir;
+	int len = 0, error = 0;
+	u32 entry_point;
+	const struct firmware *fw_lib;
+	struct snd_sst_lib_download_info dload_info = {{{0},},};
+
+	memset(buf, 0, sizeof(buf));
+
+	pr_debug("sst: Lib Type 0x%x, Slot 0x%x, ops 0x%x\n",
+			lib->lib_info.lib_type, lib->slot_info.slot_num, ops);
+	pr_debug("sst: Version 0x%x, name %s, caps 0x%x media type 0x%x\n",
+		lib->lib_info.lib_version, lib->lib_info.lib_name,
+		lib->lib_info.lib_caps, lib->lib_info.media_type);
+
+	pr_debug("sst: IRAM Size 0x%x, offset 0x%x\n",
+		lib->slot_info.iram_size, lib->slot_info.iram_offset);
+	pr_debug("sst: DRAM Size 0x%x, offset 0x%x\n",
+		lib->slot_info.dram_size, lib->slot_info.dram_offset);
+
+	switch (lib->lib_info.lib_type) {
+	case SST_CODEC_TYPE_MP3:
+		type = "mp3_";
+		break;
+	case SST_CODEC_TYPE_AAC:
+		type = "aac_";
+		break;
+	case SST_CODEC_TYPE_AACP:
+		type = "aac_v1_";
+		break;
+	case SST_CODEC_TYPE_eAACP:
+		type = "aac_v2_";
+		break;
+	case SST_CODEC_TYPE_WMA9:
+		type = "wma9_";
+		break;
+	default:
+		pr_err("sst: Invalid codec type\n");
+		error = -EINVAL;
+		goto wake;
+	}
+
+	if (ops == STREAM_OPS_CAPTURE)
+		dir = "enc_";
+	else
+		dir = "dec_";
+	len = strlen(type) + strlen(dir);
+	strncpy(buf, type, sizeof(buf)-1);
+	strncpy(buf + strlen(type), dir, sizeof(buf)-strlen(type)-1);
+	len += snprintf(buf + len, sizeof(buf) - len, "%d",
+			lib->slot_info.slot_num);
+	len += snprintf(buf + len, sizeof(buf) - len, ".bin");
+
+	pr_debug("sst: Requesting %s\n", buf);
+
+	error = request_firmware(&fw_lib, buf, &sst_drv_ctx->pci->dev);
+	if (error) {
+		pr_err("sst: library load failed %d\n", error);
+		goto wake;
+	}
+	error = sst_validate_library(fw_lib, &lib->slot_info, &entry_point);
+	if (error)
+		goto wake_free;
+
+	lib->mod_entry_pt = entry_point;
+	memcpy(&dload_info.dload_lib, lib, sizeof(*lib));
+	error = sst_download_library(fw_lib, &dload_info);
+	if (error)
+		goto wake_free;
+
+	/* lib is downloaded and init send alloc again */
+	pr_debug("sst: Library is downloaded now...\n");
+wake_free:
+	/* sst_wake_up_alloc_block(sst_drv_ctx, pvt_id, error, NULL); */
+	release_firmware(fw_lib);
+wake:
+	return error;
+}
+