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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/misc/emi26.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/usb/misc/emi26.c')
-rw-r--r--drivers/usb/misc/emi26.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/drivers/usb/misc/emi26.c b/drivers/usb/misc/emi26.c
new file mode 100644
index 000000000000..c8155209bf4b
--- /dev/null
+++ b/drivers/usb/misc/emi26.c
@@ -0,0 +1,255 @@
+/*
+ * Emagic EMI 2|6 usb audio interface firmware loader.
+ * Copyright (C) 2002
+ * Tapio Laxström (tapio.laxstrom@iptime.fi)
+ *
+ * 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.
+ *
+ * emi26.c,v 1.13 2002/03/08 13:10:26 tapio Exp
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/usb.h>
+
+#define MAX_INTEL_HEX_RECORD_LENGTH 16
+typedef struct _INTEL_HEX_RECORD
+{
+ __u32 length;
+ __u32 address;
+ __u32 type;
+ __u8 data[MAX_INTEL_HEX_RECORD_LENGTH];
+} INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
+
+/* include firmware (variables) */
+#include "emi26_fw.h"
+
+#define EMI26_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */
+#define EMI26_PRODUCT_ID 0x0100 /* EMI 2|6 without firmware */
+#define EMI26B_PRODUCT_ID 0x0102 /* EMI 2|6 without firmware */
+
+#define ANCHOR_LOAD_INTERNAL 0xA0 /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
+#define ANCHOR_LOAD_EXTERNAL 0xA3 /* This command is not implemented in the core. Requires firmware */
+#define ANCHOR_LOAD_FPGA 0xA5 /* This command is not implemented in the core. Requires firmware. Emagic extension */
+#define MAX_INTERNAL_ADDRESS 0x1B3F /* This is the highest internal RAM address for the AN2131Q */
+#define CPUCS_REG 0x7F92 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */
+#define INTERNAL_RAM(address) (address <= MAX_INTERNAL_ADDRESS)
+
+static int emi26_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
+static int emi26_set_reset(struct usb_device *dev, unsigned char reset_bit);
+static int emi26_load_firmware (struct usb_device *dev);
+static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id);
+static void emi26_disconnect(struct usb_interface *intf);
+static int __init emi26_init (void);
+static void __exit emi26_exit (void);
+
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi26_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
+{
+ int result;
+ unsigned char *buffer = kmalloc (length, GFP_KERNEL);
+
+ if (!buffer) {
+ err("emi26: kmalloc(%d) failed.", length);
+ return -ENOMEM;
+ }
+ memcpy (buffer, data, length);
+ /* Note: usb_control_msg returns negative value on error or length of the
+ * data that was written! */
+ result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
+ kfree (buffer);
+ return result;
+}
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi26_set_reset (struct usb_device *dev, unsigned char reset_bit)
+{
+ int response;
+ info("%s - %d", __FUNCTION__, reset_bit);
+ /* printk(KERN_DEBUG "%s - %d", __FUNCTION__, reset_bit); */
+ response = emi26_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
+ if (response < 0) {
+ err("emi26: set_reset (%d) failed", reset_bit);
+ }
+ return response;
+}
+
+#define FW_LOAD_SIZE 1023
+
+static int emi26_load_firmware (struct usb_device *dev)
+{
+ int err;
+ int i;
+ int pos = 0; /* Position in hex record */
+ __u32 addr; /* Address to write */
+ __u8 *buf;
+
+ buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
+ if (!buf) {
+ err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
+ err = -ENOMEM;
+ goto wraperr;
+ }
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0) {
+ err( "%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+
+ /* 1. We need to put the loader for the FPGA into the EZ-USB */
+ for (i=0; g_Loader[i].type == 0; i++) {
+ err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+ }
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+
+ /* 2. We upload the FPGA firmware into the EMI
+ * Note: collect up to 1023 (yes!) bytes and send them with
+ * a single request. This is _much_ faster! */
+ do {
+ i = 0;
+ addr = g_bitstream[pos].address;
+
+ /* intel hex records are terminated with type 0 element */
+ while ((g_bitstream[pos].type == 0) && (i + g_bitstream[pos].length < FW_LOAD_SIZE)) {
+ memcpy(buf + i, g_bitstream[pos].data, g_bitstream[pos].length);
+ i += g_bitstream[pos].length;
+ pos++;
+ }
+ err = emi26_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+ } while (i > 0);
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+
+ /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
+ for (i=0; g_Loader[i].type == 0; i++) {
+ err = emi26_writememory(dev, g_Loader[i].address, g_Loader[i].data, g_Loader[i].length, ANCHOR_LOAD_INTERNAL);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+ }
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+
+ /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
+ for (i=0; g_Firmware[i].type == 0; i++) {
+ if (!INTERNAL_RAM(g_Firmware[i].address)) {
+ err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_EXTERNAL);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+ }
+ }
+
+ /* Assert reset (stop the CPU in the EMI) */
+ err = emi26_set_reset(dev,1);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+
+ for (i=0; g_Firmware[i].type == 0; i++) {
+ if (INTERNAL_RAM(g_Firmware[i].address)) {
+ err = emi26_writememory(dev, g_Firmware[i].address, g_Firmware[i].data, g_Firmware[i].length, ANCHOR_LOAD_INTERNAL);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+ }
+ }
+
+ /* De-assert reset (let the CPU run) */
+ err = emi26_set_reset(dev,0);
+ if (err < 0) {
+ err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+ goto wraperr;
+ }
+
+ /* return 1 to fail the driver inialization
+ * and give real driver change to load */
+ err = 1;
+
+wraperr:
+ kfree(buf);
+ return err;
+}
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(EMI26_VENDOR_ID, EMI26_PRODUCT_ID) },
+ { USB_DEVICE(EMI26_VENDOR_ID, EMI26B_PRODUCT_ID) },
+ { } /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static int emi26_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+
+ info("%s start", __FUNCTION__);
+
+ emi26_load_firmware(dev);
+
+ /* do not return the driver context, let real audio driver do that */
+ return -EIO;
+}
+
+static void emi26_disconnect(struct usb_interface *intf)
+{
+}
+
+static struct usb_driver emi26_driver = {
+ .owner = THIS_MODULE,
+ .name = "emi26 - firmware loader",
+ .probe = emi26_probe,
+ .disconnect = emi26_disconnect,
+ .id_table = id_table,
+};
+
+static int __init emi26_init (void)
+{
+ return usb_register(&emi26_driver);
+}
+
+static void __exit emi26_exit (void)
+{
+ usb_deregister (&emi26_driver);
+}
+
+module_init(emi26_init);
+module_exit(emi26_exit);
+
+MODULE_AUTHOR("tapio laxström");
+MODULE_DESCRIPTION("Emagic EMI 2|6 firmware loader.");
+MODULE_LICENSE("GPL");
+
+/* vi:ai:syntax=c:sw=8:ts=8:tw=80
+ */