From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-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! --- drivers/usb/misc/emi26.c | 255 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 255 insertions(+) create mode 100644 drivers/usb/misc/emi26.c (limited to 'drivers/usb/misc/emi26.c') 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 +#include +#include +#include +#include +#include + +#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 + */ -- cgit v1.2.3