ALSA: usb/6fire - Driver for TerraTec DMX 6Fire USB

What is working: Everything except SPDIF
- Hardware Master volume
- PCM 44-192kHz@24 bits, 6 channels out, 4 channels in (analog)
- MIDI in/out
- firmware loading after cold start
- phono/line switching

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 426 insertions, 0 deletions

diff --git a/sound/usb/6fire/firmware.c b/sound/usb/6fire/firmware.c
new file mode 100644
index 000000000000..9081a54a9c6c
--- /dev/null
+++ b/sound/usb/6fire/firmware.c
@@ -0,0 +1,426 @@
+/*
+ * Linux driver for TerraTec DMX 6Fire USB
+ *
+ * Firmware loader
+ *
+ * Currently not working for all devices. To be able to use the device
+ * in linux, it is also possible to let the windows driver upload the firmware.
+ * For that, start the computer in windows and reboot.
+ * As long as the device is connected to the power supply, no firmware reload
+ * needs to be performed.
+ *
+ * Author:      Torsten Schenk <torsten.schenk@zoho.com>
+ * Created:     Jan 01, 2011
+ * Version:     0.3.0
+ * 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 "firmware.h"
+#include "chip.h"
+
+MODULE_FIRMWARE("6fire/dmx6firel2.ihx");
+MODULE_FIRMWARE("6fire/dmx6fireap.ihx");
+MODULE_FIRMWARE("6fire/dmx6firecf.bin");
+
+enum {
+        FPGA_BUFSIZE = 512, FPGA_EP = 2
+};
+
+static const u8 BIT_REVERSE_TABLE[256] = {
+        0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, 0x10, 0x90, 0x50,
+        0xd0, 0x30, 0xb0, 0x70, 0xf0, 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8,
+        0x68, 0xe8, 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, 0x04,
+        0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, 0x14, 0x94, 0x54, 0xd4,
+        0x34, 0xb4, 0x74, 0xf4, 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c,
+        0xec, 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, 0x02, 0x82,
+        0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, 0x12, 0x92, 0x52, 0xd2, 0x32,
+        0xb2, 0x72, 0xf2, 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
+        0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, 0x06, 0x86, 0x46,
+        0xc6, 0x26, 0xa6, 0x66, 0xe6, 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6,
+        0x76, 0xf6, 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, 0x1e,
+        0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, 0x01, 0x81, 0x41, 0xc1,
+        0x21, 0xa1, 0x61, 0xe1, 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71,
+        0xf1, 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, 0x19, 0x99,
+        0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, 0x05, 0x85, 0x45, 0xc5, 0x25,
+        0xa5, 0x65, 0xe5, 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
+        0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, 0x1d, 0x9d, 0x5d,
+        0xdd, 0x3d, 0xbd, 0x7d, 0xfd, 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3,
+        0x63, 0xe3, 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, 0x0b,
+        0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, 0x1b, 0x9b, 0x5b, 0xdb,
+        0x3b, 0xbb, 0x7b, 0xfb, 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67,
+        0xe7, 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, 0x0f, 0x8f,
+        0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, 0x1f, 0x9f, 0x5f, 0xdf, 0x3f,
+        0xbf, 0x7f, 0xff };
+
+/*
+ * 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) */
+};
+
+struct ihex_record {
+        u16 address;
+        u8 len;
+        u8 data[256];
+        char error; /* true if an error occured 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_nibble(const u8 n)
+{
+        if (n >= '0' && n <= '9')
+                return n - '0';
+        else if (n >= 'A' && n <= 'F')
+                return n - ('A' - 10);
+        else if (n >= 'a' && n <= 'f')
+                return n - ('a' - 10);
+        return 0;
+}
+
+static u8 usb6fire_fw_ihex_hex(const u8 *data, u8 *crc)
+{
+        u8 val = (usb6fire_fw_ihex_nibble(data[0]) << 4) |
+                        usb6fire_fw_ihex_nibble(data[1]);
+        *crc += val;
+        return val;
+}
+
+/*
+ * returns true if record is available, false otherwise.
+ * iff an error occured, 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 = 0;
+        struct ihex_record *rec = kmalloc(sizeof(struct ihex_record),
+                        GFP_KERNEL);
+
+        if (!rec)
+                return -ENOMEM;
+
+        ret = request_firmware(&fw, fwname, &device->dev);
+        if (ret < 0) {
+                kfree(rec);
+                snd_printk(KERN_ERR PREFIX "error requesting ezusb "
+                                "firmware %s.\n", fwname);
+                return ret;
+        }
+        ret = usb6fire_fw_ihex_init(fw, rec);
+        if (ret < 0) {
+                kfree(rec);
+                snd_printk(KERN_ERR PREFIX "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);
+                snd_printk(KERN_ERR PREFIX "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);
+                        snd_printk(KERN_ERR PREFIX "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) {
+                        snd_printk(KERN_ERR PREFIX "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) {
+                release_firmware(fw);
+                snd_printk(KERN_ERR PREFIX "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 = request_firmware(&fw, fwname, &device->dev);
+        if (ret < 0) {
+                snd_printk(KERN_ERR PREFIX "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);
+                snd_printk(KERN_ERR PREFIX "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] = BIT_REVERSE_TABLE[(u8) *c];
+
+                ret = usb6fire_fw_fpga_write(device, buffer, i);
+                if (ret < 0) {
+                        release_firmware(fw);
+                        kfree(buffer);
+                        snd_printk(KERN_ERR PREFIX "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) {
+                snd_printk(KERN_ERR PREFIX "unable to upload fpga firmware: "
+                                "end urb.\n");
+                return ret;
+        }
+        return 0;
+}
+
+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) {
+                snd_printk(KERN_ERR PREFIX "unable to receive device "
+                                "firmware state.\n");
+                return ret;
+        }
+        if (buffer[0] != 0xeb || buffer[1] != 0xaa || buffer[2] != 0x55
+                        || buffer[4] != 0x03 || buffer[5] != 0x01 || buffer[7]
+                        != 0x00) {
+                snd_printk(KERN_ERR PREFIX "unknown device firmware state "
+                                "received from device: ");
+                for (i = 0; i < 8; i++)
+                        snd_printk("%02x ", buffer[i]);
+                snd_printk("\n");
+                return -EIO;
+        }
+        /* do we need fpga loader ezusb firmware? */
+        if (buffer[3] == 0x01 && buffer[6] == 0x19) {
+                ret = usb6fire_fw_ezusb_upload(intf,
+                                "6fire/dmx6firel2.ihx", 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 && buffer[6] == 0x0b) {
+                ret = usb6fire_fw_fpga_upload(intf, "6fire/dmx6firecf.bin");
+                if (ret < 0)
+                        return ret;
+                memcpy(buffer, ep_w_max_packet_size,
+                                sizeof(ep_w_max_packet_size));
+                ret = usb6fire_fw_ezusb_upload(intf, "6fire/dmx6fireap.ihx",
+                                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 && buffer[6] == 0x0b)
+                return 0;
+        /* unknown data? */
+        else {
+                snd_printk(KERN_ERR PREFIX "unknown device firmware state "
+                                "received from device: ");
+                for (i = 0; i < 8; i++)
+                        snd_printk("%02x ", buffer[i]);
+                snd_printk("\n");
+                return -EIO;
+        }
+        return 0;
+}
+