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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /sound/pci/asihpi/hpidspcd.c
Initial import
Diffstat (limited to 'sound/pci/asihpi/hpidspcd.c')
-rw-r--r--sound/pci/asihpi/hpidspcd.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/sound/pci/asihpi/hpidspcd.c b/sound/pci/asihpi/hpidspcd.c
new file mode 100644
index 000000000..3298f6b01
--- /dev/null
+++ b/sound/pci/asihpi/hpidspcd.c
@@ -0,0 +1,142 @@
+/***********************************************************************
+
+ AudioScience HPI driver
+ Functions for reading DSP code using hotplug firmware loader
+
+ Copyright (C) 1997-2014 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
+ published by the Free Software Foundation;
+
+ 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
+
+***********************************************************************/
+#define SOURCEFILE_NAME "hpidspcd.c"
+#include "hpidspcd.h"
+#include "hpidebug.h"
+#include "hpi_version.h"
+
+struct dsp_code_private {
+ /** Firmware descriptor */
+ const struct firmware *firmware;
+ struct pci_dev *dev;
+};
+
+/*-------------------------------------------------------------------*/
+short hpi_dsp_code_open(u32 adapter, void *os_data, struct dsp_code *dsp_code,
+ u32 *os_error_code)
+{
+ const struct firmware *firmware;
+ struct pci_dev *dev = os_data;
+ struct code_header header;
+ char fw_name[20];
+ short err_ret = HPI_ERROR_DSP_FILE_NOT_FOUND;
+ int err;
+
+ sprintf(fw_name, "/*(DEBLOBBED)*/", adapter);
+
+ err = reject_firmware(&firmware, fw_name, &dev->dev);
+
+ if (err || !firmware) {
+ dev_err(&dev->dev, "%d, request_firmware failed for %s\n",
+ err, fw_name);
+ goto error1;
+ }
+ if (firmware->size < sizeof(header)) {
+ dev_err(&dev->dev, "Header size too small %s\n", fw_name);
+ goto error2;
+ }
+ memcpy(&header, firmware->data, sizeof(header));
+
+ if ((header.type != 0x45444F43) || /* "CODE" */
+ (header.adapter != adapter)
+ || (header.size != firmware->size)) {
+ dev_err(&dev->dev,
+ "Invalid firmware header size %d != file %zd\n",
+ header.size, firmware->size);
+ goto error2;
+ }
+
+ if (HPI_VER_MAJOR(header.version) != HPI_VER_MAJOR(HPI_VER)) {
+ /* Major version change probably means Host-DSP protocol change */
+ dev_err(&dev->dev,
+ "Incompatible firmware version DSP image %X != Driver %X\n",
+ header.version, HPI_VER);
+ goto error2;
+ }
+
+ if (header.version != HPI_VER) {
+ dev_warn(&dev->dev,
+ "Firmware version mismatch: DSP image %X != Driver %X\n",
+ header.version, HPI_VER);
+ }
+
+ HPI_DEBUG_LOG(DEBUG, "dsp code %s opened\n", fw_name);
+ dsp_code->pvt = kmalloc(sizeof(*dsp_code->pvt), GFP_KERNEL);
+ if (!dsp_code->pvt) {
+ err_ret = HPI_ERROR_MEMORY_ALLOC;
+ goto error2;
+ }
+
+ 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(firmware);
+error1:
+ dsp_code->block_length = 0;
+ return err_ret;
+}
+
+/*-------------------------------------------------------------------*/
+void hpi_dsp_code_close(struct dsp_code *dsp_code)
+{
+ HPI_DEBUG_LOG(DEBUG, "dsp code closed\n");
+ release_firmware(dsp_code->pvt->firmware);
+ kfree(dsp_code->pvt);
+}
+
+/*-------------------------------------------------------------------*/
+void hpi_dsp_code_rewind(struct dsp_code *dsp_code)
+{
+ /* Go back to start of data, after header */
+ dsp_code->word_count = sizeof(struct code_header) / sizeof(u32);
+}
+
+/*-------------------------------------------------------------------*/
+short hpi_dsp_code_read_word(struct dsp_code *dsp_code, u32 *pword)
+{
+ if (dsp_code->word_count + 1 > dsp_code->block_length)
+ return HPI_ERROR_DSP_FILE_FORMAT;
+
+ *pword = ((u32 *)(dsp_code->pvt->firmware->data))[dsp_code->
+ word_count];
+ dsp_code->word_count++;
+ return 0;
+}
+
+/*-------------------------------------------------------------------*/
+short hpi_dsp_code_read_block(size_t words_requested,
+ struct dsp_code *dsp_code, u32 **ppblock)
+{
+ if (dsp_code->word_count + words_requested > dsp_code->block_length)
+ return HPI_ERROR_DSP_FILE_FORMAT;
+
+ *ppblock =
+ ((u32 *)(dsp_code->pvt->firmware->data)) +
+ dsp_code->word_count;
+ dsp_code->word_count += words_requested;
+ return 0;
+}