| /* |
| * 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. |
| * |
| * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $ |
| */ |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/slab.h> |
| #include <linux/init.h> |
| #include <linux/module.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)*/ |
| |
| /* FIXME: This is quick and dirty solution! */ |
| #define SPDIF /* if you want SPDIF comment next line */ |
| //#undef SPDIF /* if you want MIDI uncomment this line */ |
| |
| #ifdef SPDIF |
| # include "emi62_fw_s.h" /* spdif fw */ |
| #else |
| # include "emi62_fw_m.h" /* midi fw */ |
| #endif |
| |
| #define EMI62_VENDOR_ID 0x086a /* Emagic Soft-und Hardware GmBH */ |
| #define EMI62_PRODUCT_ID 0x0110 /* EMI 6|2m 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 emi62_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest); |
| static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit); |
| static int emi62_load_firmware (struct usb_device *dev); |
| static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id); |
| static void emi62_disconnect(struct usb_interface *intf); |
| static int __init emi62_init (void); |
| static void __exit emi62_exit (void); |
| |
| |
| /* thanks to drivers/usb/serial/keyspan_pda.c code */ |
| static int emi62_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("emi62: 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 emi62_set_reset (struct usb_device *dev, unsigned char reset_bit) |
| { |
| int response; |
| info("%s - %d", __FUNCTION__, reset_bit); |
| |
| response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0); |
| if (response < 0) { |
| err("emi62: set_reset (%d) failed", reset_bit); |
| } |
| return response; |
| } |
| |
| #define FW_LOAD_SIZE 1023 |
| |
| static int emi62_load_firmware (struct usb_device *dev) |
| { |
| int err; |
| int i; |
| int pos = 0; /* Position in hex record */ |
| __u32 addr; /* Address to write */ |
| __u8 *buf; |
| |
| dev_dbg(&dev->dev, "load_firmware\n"); |
| 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 = emi62_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_emi62_loader[i].type == 0; i++) { |
| err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_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_emi62bs[pos].address; |
| |
| /* intel hex records are terminated with type 0 element */ |
| while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) { |
| memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length); |
| i += g_emi62bs[pos].length; |
| pos++; |
| } |
| err = emi62_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 = emi62_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_emi62_loader[i].type == 0; i++) { |
| err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_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 = emi62_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 */ |
| |
| /* FIXME: quick and dirty ifdefs */ |
| #ifdef SPDIF |
| for (i=0; g_HexSpdifFw62[i].type == 0; i++) { |
| if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) { |
| err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d", __FUNCTION__, err); |
| goto wraperr; |
| } |
| } |
| } |
| #else /* MIDI */ |
| for (i=0; g_HexMidiFw62[i].type == 0; i++) { |
| if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) { |
| err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d\n", __FUNCTION__, err); |
| goto wraperr; |
| return err; |
| } |
| } |
| } |
| #endif |
| /* Assert reset (stop the CPU in the EMI) */ |
| err = emi62_set_reset(dev,1); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d", __FUNCTION__, err); |
| goto wraperr; |
| } |
| |
| /* FIXME: quick and dirty ifdefs */ |
| #ifdef SPDIF |
| for (i=0; g_HexSpdifFw62[i].type == 0; i++) { |
| if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) { |
| err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d", __FUNCTION__, err); |
| goto wraperr; |
| } |
| } |
| } |
| #else /* MIDI */ |
| for (i=0; g_HexMidiFw62[i].type == 0; i++) { |
| if (INTERNAL_RAM(g_HexMidiFw62[i].address)) { |
| err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d\n", __FUNCTION__, err); |
| goto wraperr; |
| } |
| } |
| } |
| #endif |
| |
| /* De-assert reset (let the CPU run) */ |
| err = emi62_set_reset(dev,0); |
| if (err < 0) { |
| err("%s - error loading firmware: error = %d", __FUNCTION__, err); |
| goto wraperr; |
| } |
| |
| kfree(buf); |
| |
| /* return 1 to fail the driver inialization |
| * and give real driver change to load */ |
| return 1; |
| |
| wraperr: |
| kfree(buf); |
| dev_err(&dev->dev, "Error\n"); |
| return err; |
| } |
| |
| static __devinitdata struct usb_device_id id_table [] = { |
| { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE (usb, id_table); |
| |
| static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id) |
| { |
| struct usb_device *dev = interface_to_usbdev(intf); |
| dev_dbg(&intf->dev, "emi62_probe\n"); |
| |
| info("%s start", __FUNCTION__); |
| |
| emi62_load_firmware(dev); |
| |
| /* do not return the driver context, let real audio driver do that */ |
| return -EIO; |
| } |
| |
| static void emi62_disconnect(struct usb_interface *intf) |
| { |
| } |
| |
| static struct usb_driver emi62_driver = { |
| .owner = THIS_MODULE, |
| .name = "emi62 - firmware loader", |
| .probe = emi62_probe, |
| .disconnect = emi62_disconnect, |
| .id_table = id_table, |
| }; |
| |
| static int __init emi62_init (void) |
| { |
| int retval; |
| retval = usb_register (&emi62_driver); |
| if (retval) |
| printk(KERN_ERR "adi-emi: registration failed\n"); |
| return retval; |
| } |
| |
| static void __exit emi62_exit (void) |
| { |
| usb_deregister (&emi62_driver); |
| } |
| |
| module_init(emi62_init); |
| module_exit(emi62_exit); |
| |
| MODULE_AUTHOR("tapio laxström"); |
| MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader."); |
| MODULE_LICENSE("GPL"); |
| |
| /* vi:ai:syntax=c:sw=8:ts=8:tw=80 |
| */ |