/* * EZ-USB specific functions used by some of the USB to Serial drivers. * * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License version * 2 as published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/usb.h> #include <linux/firmware.h> #include <linux/ihex.h> struct ezusb_fx_type { /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ unsigned short cpucs_reg; unsigned short max_internal_adress; }; struct ezusb_fx_type ezusb_fx1 = { .cpucs_reg = 0x7F92, .max_internal_adress = 0x1B3F, }; struct ezusb_fx_type ezusb_fx2 = { .cpucs_reg = 0xE600, .max_internal_adress = 0x3FFF, }; /* Commands for writing to memory */ #define WRITE_INT_RAM 0xA0 #define WRITE_EXT_RAM 0xA3 int ezusb_writememory(struct usb_device *dev, int address, unsigned char *data, int length, __u8 request) { int result; unsigned char *transfer_buffer; if (!dev) return -ENODEV; transfer_buffer = kmemdup(data, length, GFP_KERNEL); if (!transfer_buffer) { dev_err(&dev->dev, "%s - kmalloc(%d) failed.\n", __func__, length); return -ENOMEM; } result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, address, 0, transfer_buffer, length, 3000); kfree(transfer_buffer); return result; } EXPORT_SYMBOL_GPL(ezusb_writememory); int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg, unsigned char reset_bit) { int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM); if (response < 0) dev_err(&dev->dev, "%s-%d failed: %d\n", __func__, reset_bit, response); return response; } int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit) { return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit); } EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset); int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit) { return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit); } EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset); static int ezusb_ihex_firmware_download(struct usb_device *dev, struct ezusb_fx_type fx, const char *firmware_path) { int ret = -ENOENT; const struct firmware *firmware = NULL; const struct ihex_binrec *record; if (request_ihex_firmware(&firmware, firmware_path, &dev->dev)) { dev_err(&dev->dev, "%s - request \"%s\" failed\n", __func__, firmware_path); goto out; } ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); if (ret < 0) goto out; record = (const struct ihex_binrec *)firmware->data; for (; record; record = ihex_next_binrec(record)) { if (be32_to_cpu(record->addr) > fx.max_internal_adress) { ret = ezusb_writememory(dev, be32_to_cpu(record->addr), (unsigned char *)record->data, be16_to_cpu(record->len), WRITE_EXT_RAM); if (ret < 0) { dev_err(&dev->dev, "%s - ezusb_writememory " "failed writing internal memory " "(%d %04X %p %d)\n", __func__, ret, be32_to_cpu(record->addr), record->data, be16_to_cpu(record->len)); goto out; } } } ret = ezusb_set_reset(dev, fx.cpucs_reg, 1); if (ret < 0) goto out; record = (const struct ihex_binrec *)firmware->data; for (; record; record = ihex_next_binrec(record)) { if (be32_to_cpu(record->addr) <= fx.max_internal_adress) { ret = ezusb_writememory(dev, be32_to_cpu(record->addr), (unsigned char *)record->data, be16_to_cpu(record->len), WRITE_INT_RAM); if (ret < 0) { dev_err(&dev->dev, "%s - ezusb_writememory " "failed writing external memory " "(%d %04X %p %d)\n", __func__, ret, be32_to_cpu(record->addr), record->data, be16_to_cpu(record->len)); goto out; } } } ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); out: release_firmware(firmware); return ret; } int ezusb_fx1_ihex_firmware_download(struct usb_device *dev, const char *firmware_path) { return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path); } EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download); int ezusb_fx2_ihex_firmware_download(struct usb_device *dev, const char *firmware_path) { return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path); } EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download);