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Diffstat (limited to 'sound/usb/6fire/firmware.c')
-rw-r--r--sound/usb/6fire/firmware.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/sound/usb/6fire/firmware.c b/sound/usb/6fire/firmware.c
new file mode 100644
index 000000000..e4db9a8de
--- /dev/null
+++ b/sound/usb/6fire/firmware.c
@@ -0,0 +1,419 @@
+/*
+ * Linux driver for TerraTec DMX 6Fire USB
+ *
+ * Firmware loader
+ *
+ * Author: Torsten Schenk <torsten.schenk@zoho.com>
+ * Created: Jan 01, 2011
+ * Copyright: (C) Torsten Schenk
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/bitrev.h>
+#include <linux/kernel.h>
+
+#include "firmware.h"
+#include "chip.h"
+
+/*(DEBLOBBED)*/
+
+enum {
+ FPGA_BUFSIZE = 512, FPGA_EP = 2
+};
+
+/*
+ * wMaxPacketSize of pcm endpoints.
+ * keep synced with rates_in_packet_size and rates_out_packet_size in pcm.c
+ * fpp: frames per isopacket
+ *
+ * CAUTION: keep sizeof <= buffer[] in usb6fire_fw_init
+ */
+static const u8 ep_w_max_packet_size[] = {
+ 0xe4, 0x00, 0xe4, 0x00, /* alt 1: 228 EP2 and EP6 (7 fpp) */
+ 0xa4, 0x01, 0xa4, 0x01, /* alt 2: 420 EP2 and EP6 (13 fpp)*/
+ 0x94, 0x01, 0x5c, 0x02 /* alt 3: 404 EP2 and 604 EP6 (25 fpp) */
+};
+
+static const u8 known_fw_versions[][2] = {
+ { 0x03, 0x01 }
+};
+
+struct ihex_record {
+ u16 address;
+ u8 len;
+ u8 data[256];
+ char error; /* true if an error occurred parsing this record */
+
+ u8 max_len; /* maximum record length in whole ihex */
+
+ /* private */
+ const char *txt_data;
+ unsigned int txt_length;
+ unsigned int txt_offset; /* current position in txt_data */
+};
+
+static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc)
+{
+ u8 val = 0;
+ int hval;
+
+ hval = hex_to_bin(data[0]);
+ if (hval >= 0)
+ val |= (hval << 4);
+
+ hval = hex_to_bin(data[1]);
+ if (hval >= 0)
+ val |= hval;
+
+ *crc += val;
+ return val;
+}
+
+/*
+ * returns true if record is available, false otherwise.
+ * iff an error occurred, false will be returned and record->error will be true.
+ */
+static bool usb6fire_fw_ihex_next_record(struct ihex_record *record)
+{
+ u8 crc = 0;
+ u8 type;
+ int i;
+
+ record->error = false;
+
+ /* find begin of record (marked by a colon) */
+ while (record->txt_offset < record->txt_length
+ && record->txt_data[record->txt_offset] != ':')
+ record->txt_offset++;
+ if (record->txt_offset == record->txt_length)
+ return false;
+
+ /* number of characters needed for len, addr and type entries */
+ record->txt_offset++;
+ if (record->txt_offset + 8 > record->txt_length) {
+ record->error = true;
+ return false;
+ }
+
+ record->len = usb6fire_fw_ihex_hex(record->txt_data +
+ record->txt_offset, &crc);
+ record->txt_offset += 2;
+ record->address = usb6fire_fw_ihex_hex(record->txt_data +
+ record->txt_offset, &crc) << 8;
+ record->txt_offset += 2;
+ record->address |= usb6fire_fw_ihex_hex(record->txt_data +
+ record->txt_offset, &crc);
+ record->txt_offset += 2;
+ type = usb6fire_fw_ihex_hex(record->txt_data +
+ record->txt_offset, &crc);
+ record->txt_offset += 2;
+
+ /* number of characters needed for data and crc entries */
+ if (record->txt_offset + 2 * (record->len + 1) > record->txt_length) {
+ record->error = true;
+ return false;
+ }
+ for (i = 0; i < record->len; i++) {
+ record->data[i] = usb6fire_fw_ihex_hex(record->txt_data
+ + record->txt_offset, &crc);
+ record->txt_offset += 2;
+ }
+ usb6fire_fw_ihex_hex(record->txt_data + record->txt_offset, &crc);
+ if (crc) {
+ record->error = true;
+ return false;
+ }
+
+ if (type == 1 || !record->len) /* eof */
+ return false;
+ else if (type == 0)
+ return true;
+ else {
+ record->error = true;
+ return false;
+ }
+}
+
+static int usb6fire_fw_ihex_init(const struct firmware *fw,
+ struct ihex_record *record)
+{
+ record->txt_data = fw->data;
+ record->txt_length = fw->size;
+ record->txt_offset = 0;
+ record->max_len = 0;
+ /* read all records, if loop ends, record->error indicates,
+ * whether ihex is valid. */
+ while (usb6fire_fw_ihex_next_record(record))
+ record->max_len = max(record->len, record->max_len);
+ if (record->error)
+ return -EINVAL;
+ record->txt_offset = 0;
+ return 0;
+}
+
+static int usb6fire_fw_ezusb_write(struct usb_device *device,
+ int type, int value, char *data, int len)
+{
+ int ret;
+
+ ret = usb_control_msg(device, usb_sndctrlpipe(device, 0), type,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ value, 0, data, len, HZ);
+ if (ret < 0)
+ return ret;
+ else if (ret != len)
+ return -EIO;
+ return 0;
+}
+
+static int usb6fire_fw_ezusb_read(struct usb_device *device,
+ int type, int value, char *data, int len)
+{
+ int ret = usb_control_msg(device, usb_rcvctrlpipe(device, 0), type,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, value,
+ 0, data, len, HZ);
+ if (ret < 0)
+ return ret;
+ else if (ret != len)
+ return -EIO;
+ return 0;
+}
+
+static int usb6fire_fw_fpga_write(struct usb_device *device,
+ char *data, int len)
+{
+ int actual_len;
+ int ret;
+
+ ret = usb_bulk_msg(device, usb_sndbulkpipe(device, FPGA_EP), data, len,
+ &actual_len, HZ);
+ if (ret < 0)
+ return ret;
+ else if (actual_len != len)
+ return -EIO;
+ return 0;
+}
+
+static int usb6fire_fw_ezusb_upload(
+ struct usb_interface *intf, const char *fwname,
+ unsigned int postaddr, u8 *postdata, unsigned int postlen)
+{
+ int ret;
+ u8 data;
+ struct usb_device *device = interface_to_usbdev(intf);
+ const struct firmware *fw = NULL;
+ struct ihex_record *rec = kmalloc(sizeof(struct ihex_record),
+ GFP_KERNEL);
+
+ if (!rec)
+ return -ENOMEM;
+
+ ret = reject_firmware(&fw, fwname, &device->dev);
+ if (ret < 0) {
+ kfree(rec);
+ dev_err(&intf->dev,
+ "error requesting ezusb firmware %s.\n", fwname);
+ return ret;
+ }
+ ret = usb6fire_fw_ihex_init(fw, rec);
+ if (ret < 0) {
+ kfree(rec);
+ release_firmware(fw);
+ dev_err(&intf->dev,
+ "error validating ezusb firmware %s.\n", fwname);
+ return ret;
+ }
+ /* upload firmware image */
+ data = 0x01; /* stop ezusb cpu */
+ ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
+ if (ret < 0) {
+ kfree(rec);
+ release_firmware(fw);
+ dev_err(&intf->dev,
+ "unable to upload ezusb firmware %s: begin message.\n",
+ fwname);
+ return ret;
+ }
+
+ while (usb6fire_fw_ihex_next_record(rec)) { /* write firmware */
+ ret = usb6fire_fw_ezusb_write(device, 0xa0, rec->address,
+ rec->data, rec->len);
+ if (ret < 0) {
+ kfree(rec);
+ release_firmware(fw);
+ dev_err(&intf->dev,
+ "unable to upload ezusb firmware %s: data urb.\n",
+ fwname);
+ return ret;
+ }
+ }
+
+ release_firmware(fw);
+ kfree(rec);
+ if (postdata) { /* write data after firmware has been uploaded */
+ ret = usb6fire_fw_ezusb_write(device, 0xa0, postaddr,
+ postdata, postlen);
+ if (ret < 0) {
+ dev_err(&intf->dev,
+ "unable to upload ezusb firmware %s: post urb.\n",
+ fwname);
+ return ret;
+ }
+ }
+
+ data = 0x00; /* resume ezusb cpu */
+ ret = usb6fire_fw_ezusb_write(device, 0xa0, 0xe600, &data, 1);
+ if (ret < 0) {
+ dev_err(&intf->dev,
+ "unable to upload ezusb firmware %s: end message.\n",
+ fwname);
+ return ret;
+ }
+ return 0;
+}
+
+static int usb6fire_fw_fpga_upload(
+ struct usb_interface *intf, const char *fwname)
+{
+ int ret;
+ int i;
+ struct usb_device *device = interface_to_usbdev(intf);
+ u8 *buffer = kmalloc(FPGA_BUFSIZE, GFP_KERNEL);
+ const char *c;
+ const char *end;
+ const struct firmware *fw;
+
+ if (!buffer)
+ return -ENOMEM;
+
+ ret = reject_firmware(&fw, fwname, &device->dev);
+ if (ret < 0) {
+ dev_err(&intf->dev, "unable to get fpga firmware %s.\n",
+ fwname);
+ kfree(buffer);
+ return -EIO;
+ }
+
+ c = fw->data;
+ end = fw->data + fw->size;
+
+ ret = usb6fire_fw_ezusb_write(device, 8, 0, NULL, 0);
+ if (ret < 0) {
+ kfree(buffer);
+ release_firmware(fw);
+ dev_err(&intf->dev,
+ "unable to upload fpga firmware: begin urb.\n");
+ return ret;
+ }
+
+ while (c != end) {
+ for (i = 0; c != end && i < FPGA_BUFSIZE; i++, c++)
+ buffer[i] = bitrev8((u8)*c);
+
+ ret = usb6fire_fw_fpga_write(device, buffer, i);
+ if (ret < 0) {
+ release_firmware(fw);
+ kfree(buffer);
+ dev_err(&intf->dev,
+ "unable to upload fpga firmware: fw urb.\n");
+ return ret;
+ }
+ }
+ release_firmware(fw);
+ kfree(buffer);
+
+ ret = usb6fire_fw_ezusb_write(device, 9, 0, NULL, 0);
+ if (ret < 0) {
+ dev_err(&intf->dev,
+ "unable to upload fpga firmware: end urb.\n");
+ return ret;
+ }
+ return 0;
+}
+
+/* check, if the firmware version the devices has currently loaded
+ * is known by this driver. 'version' needs to have 4 bytes version
+ * info data. */
+static int usb6fire_fw_check(struct usb_interface *intf, const u8 *version)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(known_fw_versions); i++)
+ if (!memcmp(version, known_fw_versions + i, 2))
+ return 0;
+
+ dev_err(&intf->dev, "invalid fimware version in device: %4ph. "
+ "please reconnect to power. if this failure "
+ "still happens, check your firmware installation.",
+ version);
+ return -EINVAL;
+}
+
+int usb6fire_fw_init(struct usb_interface *intf)
+{
+ int i;
+ int ret;
+ struct usb_device *device = interface_to_usbdev(intf);
+ /* buffer: 8 receiving bytes from device and
+ * sizeof(EP_W_MAX_PACKET_SIZE) bytes for non-const copy */
+ u8 buffer[12];
+
+ ret = usb6fire_fw_ezusb_read(device, 1, 0, buffer, 8);
+ if (ret < 0) {
+ dev_err(&intf->dev,
+ "unable to receive device firmware state.\n");
+ return ret;
+ }
+ if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55) {
+ dev_err(&intf->dev,
+ "unknown device firmware state received from device:");
+ for (i = 0; i < 8; i++)
+ printk(KERN_CONT "%02x ", buffer[i]);
+ printk(KERN_CONT "\n");
+ return -EIO;
+ }
+ /* do we need fpga loader ezusb firmware? */
+ if (buffer[3] == 0x01) {
+ ret = usb6fire_fw_ezusb_upload(intf,
+ "/*(DEBLOBBED)*/", 0, NULL, 0);
+ if (ret < 0)
+ return ret;
+ return FW_NOT_READY;
+ }
+ /* do we need fpga firmware and application ezusb firmware? */
+ else if (buffer[3] == 0x02) {
+ ret = usb6fire_fw_check(intf, buffer + 4);
+ if (ret < 0)
+ return ret;
+ ret = usb6fire_fw_fpga_upload(intf, "/*(DEBLOBBED)*/");
+ if (ret < 0)
+ return ret;
+ memcpy(buffer, ep_w_max_packet_size,
+ sizeof(ep_w_max_packet_size));
+ ret = usb6fire_fw_ezusb_upload(intf, "/*(DEBLOBBED)*/",
+ 0x0003, buffer, sizeof(ep_w_max_packet_size));
+ if (ret < 0)
+ return ret;
+ return FW_NOT_READY;
+ }
+ /* all fw loaded? */
+ else if (buffer[3] == 0x03)
+ return usb6fire_fw_check(intf, buffer + 4);
+ /* unknown data? */
+ else {
+ dev_err(&intf->dev,
+ "unknown device firmware state received from device: ");
+ for (i = 0; i < 8; i++)
+ printk(KERN_CONT "%02x ", buffer[i]);
+ printk(KERN_CONT "\n");
+ return -EIO;
+ }
+ return 0;
+}
+