ALSA: asihpi - DSP code loader API now independent of OS

The loader API has been revised so that OS specific data is kept
local to hpidspcd.c, and the public API is unchanged across OSes.

Signed-off-by: Eliot Blennerhassett <eblennerhassett@audioscience.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

4 files changed, 97 insertions, 122 deletions

diff --git a/sound/pci/asihpi/hpi6000.c b/sound/pci/asihpi/hpi6000.c
index c8db36e9097..3cc6f11c20a 100644
--- a/sound/pci/asihpi/hpi6000.c
+++ b/sound/pci/asihpi/hpi6000.c
@@ -946,11 +946,8 @@ static short hpi6000_adapter_boot_load_dsp(struct hpi_adapter_obj *pao,
 		}
 
 		/* write the DSP code down into the DSPs memory */
-		/*HpiDspCode_Open(nBootLoadFamily,&DspCode,pdwOsErrorCode); */
-		dsp_code.ps_dev = pao->pci.pci_dev;
-
-		error = hpi_dsp_code_open(boot_load_family, &dsp_code,
-			pos_error_code);
+		error = hpi_dsp_code_open(boot_load_family, pao->pci.pci_dev,
+			&dsp_code, pos_error_code);
 
 		if (error)
 			return error;
diff --git a/sound/pci/asihpi/hpi6205.c b/sound/pci/asihpi/hpi6205.c
index d011932c952..3e31a3f3708 100644
--- a/sound/pci/asihpi/hpi6205.c
+++ b/sound/pci/asihpi/hpi6205.c
@@ -1371,9 +1371,8 @@ static u16 adapter_boot_load_dsp(struct hpi_adapter_obj *pao,
 			return err;
 
 		/* write the DSP code down into the DSPs memory */
-		dsp_code.ps_dev = pao->pci.pci_dev;
-		err = hpi_dsp_code_open(boot_code_id[dsp], &dsp_code,
-			pos_error_code);
+		err = hpi_dsp_code_open(boot_code_id[dsp], pao->pci.pci_dev,
+			&dsp_code, pos_error_code);
 		if (err)
 			return err;
 
diff --git a/sound/pci/asihpi/hpidspcd.c b/sound/pci/asihpi/hpidspcd.c
index 5c6ea113d21..987538819b2 100644
--- a/sound/pci/asihpi/hpidspcd.c
+++ b/sound/pci/asihpi/hpidspcd.c
@@ -1,8 +1,8 @@
 /***********************************************************************/
-/*!
+/**
 
     AudioScience HPI driver
-    Copyright (C) 1997-2010  AudioScience Inc. <support@audioscience.com>
+    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of version 2 of the GNU General Public License as
@@ -18,90 +18,60 @@
     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 \file
-Functions for reading DSP code to load into DSP
-
-(Linux only:) If DSPCODE_FIRMWARE_LOADER is defined, code is read using
+Functions for reading DSP code using
 hotplug firmware loader from individual dsp code files
-
-If neither of the above is defined, code is read from linked arrays.
-DSPCODE_ARRAY is defined.
-
-HPI_INCLUDE_**** must be defined
-and the appropriate hzz?????.c or hex?????.c linked in
-
- */
+*/
 /***********************************************************************/
 #define SOURCEFILE_NAME "hpidspcd.c"
 #include "hpidspcd.h"
 #include "hpidebug.h"
 
-/**
- Header structure for binary dsp code file (see asidsp.doc)
- This structure must match that used in s2bin.c for generation of asidsp.bin
- */
-
-#ifndef DISABLE_PRAGMA_PACK1
-#pragma pack(push, 1)
-#endif
-
-struct code_header {
-	u32 size;
-	char type[4];
-	u32 adapter;
-	u32 version;
-	u32 crc;
+struct dsp_code_private {
+	/**  Firmware descriptor */
+	const struct firmware *firmware;
+	struct pci_dev *dev;
 };
 
-#ifndef DISABLE_PRAGMA_PACK1
-#pragma pack(pop)
-#endif
-
 #define HPI_VER_DECIMAL ((int)(HPI_VER_MAJOR(HPI_VER) * 10000 + \
 	    HPI_VER_MINOR(HPI_VER) * 100 + HPI_VER_RELEASE(HPI_VER)))
 
-/***********************************************************************/
 #include <linux/pci.h>
 /*-------------------------------------------------------------------*/
-short hpi_dsp_code_open(u32 adapter, struct dsp_code *ps_dsp_code,
-	u32 *pos_error_code)
+short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
+	u32 *os_error_code)
 {
-	const struct firmware *ps_firmware = ps_dsp_code->ps_firmware;
+	const struct firmware *firmware;
+	struct pci_dev *dev = os_data;
 	struct code_header header;
 	char fw_name[20];
 	int err;
 
 	sprintf(fw_name, "asihpi/dsp%04x.bin", adapter);
 
-	err = request_firmware(&ps_firmware, fw_name,
-		&ps_dsp_code->ps_dev->dev);
+	err = request_firmware(&firmware, fw_name, &dev->dev);
 
-	if (err != 0) {
-		dev_printk(KERN_ERR, &ps_dsp_code->ps_dev->dev,
+	if (err || !firmware) {
+		dev_printk(KERN_ERR, &dev->dev,
 			"%d, request_firmware failed for  %s\n", err,
 			fw_name);
 		goto error1;
 	}
-	if (ps_firmware->size < sizeof(header)) {
-		dev_printk(KERN_ERR, &ps_dsp_code->ps_dev->dev,
-			"Header size too small %s\n", fw_name);
-		goto error2;
-	}
-	memcpy(&header, ps_firmware->data, sizeof(header));
-	if (header.adapter != adapter) {
-		dev_printk(KERN_ERR, &ps_dsp_code->ps_dev->dev,
-			"Adapter type incorrect %4x != %4x\n", header.adapter,
-			adapter);
+	if (firmware->size < sizeof(header)) {
+		dev_printk(KERN_ERR, &dev->dev, "Header size too small %s\n",
+			fw_name);
 		goto error2;
 	}
-	if (header.size != ps_firmware->size) {
-		dev_printk(KERN_ERR, &ps_dsp_code->ps_dev->dev,
-			"Code size wrong  %d != %ld\n", header.size,
-			(unsigned long)ps_firmware->size);
+	memcpy(&header, firmware->data, sizeof(header));
+
+	if ((header.type != 0x45444F43) ||	/* "CODE" */
+		(header.adapter != adapter)
+		|| (header.size != firmware->size)) {
+		dev_printk(KERN_ERR, &dev->dev, "Invalid firmware file\n");
 		goto error2;
 	}
 
-	if (header.version / 100 != HPI_VER_DECIMAL / 100) {
-		dev_printk(KERN_ERR, &ps_dsp_code->ps_dev->dev,
+	if ((header.version / 100 & ~1) != (HPI_VER_DECIMAL / 100 & ~1)) {
+		dev_printk(KERN_ERR, &dev->dev,
 			"Incompatible firmware version "
 			"DSP image %d != Driver %d\n", header.version,
 			HPI_VER_DECIMAL);
@@ -109,67 +79,70 @@ short hpi_dsp_code_open(u32 adapter, struct dsp_code *ps_dsp_code,
 	}
 
 	if (header.version != HPI_VER_DECIMAL) {
-		dev_printk(KERN_WARNING, &ps_dsp_code->ps_dev->dev,
+		dev_printk(KERN_WARNING, &dev->dev,
 			"Firmware: release version mismatch  DSP image %d != Driver %d\n",
 			header.version, HPI_VER_DECIMAL);
 	}
 
 	HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
-	ps_dsp_code->ps_firmware = ps_firmware;
-	ps_dsp_code->block_length = header.size / sizeof(u32);
-	ps_dsp_code->word_count = sizeof(header) / sizeof(u32);
-	ps_dsp_code->version = header.version;
-	ps_dsp_code->crc = header.crc;
+	dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
+	if (!dsp_code->pvt)
+		return HPI_ERROR_MEMORY_ALLOC;
+
+	dsp_code->pvt->dev = dev;
+	dsp_code->pvt->firmware = firmware;
+	dsp_code->header = header;
+	dsp_code->block_length = header.size / sizeof(u32);
+	dsp_code->word_count = sizeof(header) / sizeof(u32);
 	return 0;
 
 error2:
-	release_firmware(ps_firmware);
+	release_firmware(firmware);
 error1:
-	ps_dsp_code->ps_firmware = NULL;
-	ps_dsp_code->block_length = 0;
+	dsp_code->block_length = 0;
 	return HPI_ERROR_DSP_FILE_NOT_FOUND;
 }
 
 /*-------------------------------------------------------------------*/
-void hpi_dsp_code_close(struct dsp_code *ps_dsp_code)
+void hpi_dsp_code_close(struct dsp_code *dsp_code)
 {
-	if (ps_dsp_code->ps_firmware != NULL) {
+	if (dsp_code->pvt->firmware) {
 		HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
-		release_firmware(ps_dsp_code->ps_firmware);
-		ps_dsp_code->ps_firmware = NULL;
+		release_firmware(dsp_code->pvt->firmware);
+		dsp_code->pvt->firmware = NULL;
 	}
+	kfree(dsp_code->pvt);
 }
 
 /*-------------------------------------------------------------------*/
-void hpi_dsp_code_rewind(struct dsp_code *ps_dsp_code)
+void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
 {
 	/* Go back to start of  data, after header */
-	ps_dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
+	dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
 }
 
 /*-------------------------------------------------------------------*/
-short hpi_dsp_code_read_word(struct dsp_code *ps_dsp_code, u32 *pword)
+short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
 {
-	if (ps_dsp_code->word_count + 1 > ps_dsp_code->block_length)
+	if (dsp_code->word_count + 1 > dsp_code->block_length)
 		return HPI_ERROR_DSP_FILE_FORMAT;
 
-	*pword = ((u32 *)(ps_dsp_code->ps_firmware->data))[ps_dsp_code->
+	*pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
 		word_count];
-	ps_dsp_code->word_count++;
+	dsp_code->word_count++;
 	return 0;
 }
 
 /*-------------------------------------------------------------------*/
 short hpi_dsp_code_read_block(size_t words_requested,
-	struct dsp_code *ps_dsp_code, u32 **ppblock)
+	struct dsp_code *dsp_code, u32 **ppblock)
 {
-	if (ps_dsp_code->word_count + words_requested >
-		ps_dsp_code->block_length)
+	if (dsp_code->word_count + words_requested > dsp_code->block_length)
 		return HPI_ERROR_DSP_FILE_FORMAT;
 
 	*ppblock =
-		((u32 *)(ps_dsp_code->ps_firmware->data)) +
-		ps_dsp_code->word_count;
-	ps_dsp_code->word_count += words_requested;
+		((u32 *)(dsp_code->pvt->firmware->data)) +
+		dsp_code->word_count;
+	dsp_code->word_count += words_requested;
 	return 0;
 }
diff --git a/sound/pci/asihpi/hpidspcd.h b/sound/pci/asihpi/hpidspcd.h
index 65f0ca73270..b22881122f1 100644
--- a/sound/pci/asihpi/hpidspcd.h
+++ b/sound/pci/asihpi/hpidspcd.h
@@ -2,7 +2,7 @@
 /**
 
     AudioScience HPI driver
-    Copyright (C) 1997-2010  AudioScience Inc. <support@audioscience.com>
+    Copyright (C) 1997-2011  AudioScience Inc. <support@audioscience.com>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of version 2 of the GNU General Public License as
@@ -20,19 +20,6 @@
 \file
 Functions for reading DSP code to load into DSP
 
- hpi_dspcode_defines HPI DSP code loading method
-Define exactly one of these to select how the DSP code is supplied to
-the adapter.
-
-End users writing applications that use the HPI interface do not have to
-use any of the below defines; they are only necessary for building drivers
-
-HPI_DSPCODE_FILE:
-DSP code is supplied as a file that is opened and read from by the driver.
-
-HPI_DSPCODE_FIRMWARE:
-DSP code is read using the hotplug firmware loader module.
-     Only valid when compiling the HPI kernel driver under Linux.
 */
 /***********************************************************************/
 #ifndef _HPIDSPCD_H_
@@ -40,37 +27,56 @@ DSP code is read using the hotplug firmware loader module.
 
 #include "hpi_internal.h"
 
-#ifndef DISABLE_PRAGMA_PACK1
-#pragma pack(push, 1)
-#endif
+/** Code header version is decimal encoded e.g. 4.06.10 is 40601 */
+#define HPI_VER_DECIMAL ((int)(HPI_VER_MAJOR(HPI_VER) * 10000 + \
+HPI_VER_MINOR(HPI_VER) * 100 + HPI_VER_RELEASE(HPI_VER)))
+
+/** Header structure for dsp firmware file
+ This structure must match that used in s2bin.c for generation of asidsp.bin
+ */
+/*#ifndef DISABLE_PRAGMA_PACK1 */
+/*#pragma pack(push, 1) */
+/*#endif */
+struct code_header {
+	/** Size in bytes including header */
+	u32 size;
+	/** File type tag "CODE" == 0x45444F43 */
+	u32 type;
+	/** Adapter model number */
+	u32 adapter;
+	/** Firmware version*/
+	u32 version;
+	/** Data checksum */
+	u32 checksum;
+};
+/*#ifndef DISABLE_PRAGMA_PACK1 */
+/*#pragma pack(pop) */
+/*#endif */
+
+/*? Don't need the pragmas? */
+compile_time_assert((sizeof(struct code_header) == 20), code_header_size);
 
 /** Descriptor for dspcode from firmware loader */
 struct dsp_code {
-	/**  Firmware descriptor */
-	const struct firmware *ps_firmware;
-	struct pci_dev *ps_dev;
+	/** copy of  file header */
+	struct code_header header;
 	/** Expected number of words in the whole dsp code,INCL header */
-	long int block_length;
+	u32 block_length;
 	/** Number of words read so far */
-	long int word_count;
-	/** Version read from dsp code file */
-	u32 version;
-	/** CRC read from dsp code file */
-	u32 crc;
-};
+	u32 word_count;
 
-#ifndef DISABLE_PRAGMA_PACK1
-#pragma pack(pop)
-#endif
+	/** internal state of DSP code reader */
+	struct dsp_code_private *pvt;
+};
 
-/** Prepare *psDspCode to refer to the requuested adapter.
- Searches the file, or selects the appropriate linked array
+/** Prepare *psDspCode to refer to the requested adapter's firmware.
+Code file name is obtained from HpiOs_GetDspCodePath
 
 \return 0 for success, or error code if requested code is not available
 */
 short hpi_dsp_code_open(
 	/** Code identifier, usually adapter family */
-	u32 adapter,
+	u32 adapter, void *pci_dev,
 	/** Pointer to DSP code control structure */
 	struct dsp_code *ps_dsp_code,
 	/** Pointer to dword to receive OS specific error code */