1 /* 2 * EZ-USB specific functions used by some of the USB to Serial drivers. 3 * 4 * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License version 8 * 2 as published by the Free Software Foundation. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/slab.h> 13 #include <linux/module.h> 14 #include <linux/usb.h> 15 #include <linux/firmware.h> 16 #include <linux/ihex.h> 17 #include <linux/usb/ezusb.h> 18 19 struct ezusb_fx_type { 20 /* EZ-USB Control and Status Register. Bit 0 controls 8051 reset */ 21 unsigned short cpucs_reg; 22 unsigned short max_internal_adress; 23 }; 24 25 static const struct ezusb_fx_type ezusb_fx1 = { 26 .cpucs_reg = 0x7F92, 27 .max_internal_adress = 0x1B3F, 28 }; 29 30 /* Commands for writing to memory */ 31 #define WRITE_INT_RAM 0xA0 32 #define WRITE_EXT_RAM 0xA3 33 34 static int ezusb_writememory(struct usb_device *dev, int address, 35 unsigned char *data, int length, __u8 request) 36 { 37 int result; 38 unsigned char *transfer_buffer; 39 40 if (!dev) 41 return -ENODEV; 42 43 transfer_buffer = kmemdup(data, length, GFP_KERNEL); 44 if (!transfer_buffer) { 45 dev_err(&dev->dev, "%s - kmalloc(%d) failed.\n", 46 __func__, length); 47 return -ENOMEM; 48 } 49 result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request, 50 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 51 address, 0, transfer_buffer, length, 3000); 52 53 kfree(transfer_buffer); 54 return result; 55 } 56 57 static int ezusb_set_reset(struct usb_device *dev, unsigned short cpucs_reg, 58 unsigned char reset_bit) 59 { 60 int response = ezusb_writememory(dev, cpucs_reg, &reset_bit, 1, WRITE_INT_RAM); 61 if (response < 0) 62 dev_err(&dev->dev, "%s-%d failed: %d\n", 63 __func__, reset_bit, response); 64 return response; 65 } 66 67 int ezusb_fx1_set_reset(struct usb_device *dev, unsigned char reset_bit) 68 { 69 return ezusb_set_reset(dev, ezusb_fx1.cpucs_reg, reset_bit); 70 } 71 EXPORT_SYMBOL_GPL(ezusb_fx1_set_reset); 72 73 static int ezusb_ihex_firmware_download(struct usb_device *dev, 74 struct ezusb_fx_type fx, 75 const char *firmware_path) 76 { 77 int ret = -ENOENT; 78 const struct firmware *firmware = NULL; 79 const struct ihex_binrec *record; 80 81 if (request_ihex_firmware(&firmware, firmware_path, 82 &dev->dev)) { 83 dev_err(&dev->dev, 84 "%s - request \"%s\" failed\n", 85 __func__, firmware_path); 86 goto out; 87 } 88 89 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); 90 if (ret < 0) 91 goto out; 92 93 record = (const struct ihex_binrec *)firmware->data; 94 for (; record; record = ihex_next_binrec(record)) { 95 if (be32_to_cpu(record->addr) > fx.max_internal_adress) { 96 ret = ezusb_writememory(dev, be32_to_cpu(record->addr), 97 (unsigned char *)record->data, 98 be16_to_cpu(record->len), WRITE_EXT_RAM); 99 if (ret < 0) { 100 dev_err(&dev->dev, "%s - ezusb_writememory " 101 "failed writing internal memory " 102 "(%d %04X %p %d)\n", __func__, ret, 103 be32_to_cpu(record->addr), record->data, 104 be16_to_cpu(record->len)); 105 goto out; 106 } 107 } 108 } 109 110 ret = ezusb_set_reset(dev, fx.cpucs_reg, 1); 111 if (ret < 0) 112 goto out; 113 record = (const struct ihex_binrec *)firmware->data; 114 for (; record; record = ihex_next_binrec(record)) { 115 if (be32_to_cpu(record->addr) <= fx.max_internal_adress) { 116 ret = ezusb_writememory(dev, be32_to_cpu(record->addr), 117 (unsigned char *)record->data, 118 be16_to_cpu(record->len), WRITE_INT_RAM); 119 if (ret < 0) { 120 dev_err(&dev->dev, "%s - ezusb_writememory " 121 "failed writing external memory " 122 "(%d %04X %p %d)\n", __func__, ret, 123 be32_to_cpu(record->addr), record->data, 124 be16_to_cpu(record->len)); 125 goto out; 126 } 127 } 128 } 129 ret = ezusb_set_reset(dev, fx.cpucs_reg, 0); 130 out: 131 release_firmware(firmware); 132 return ret; 133 } 134 135 int ezusb_fx1_ihex_firmware_download(struct usb_device *dev, 136 const char *firmware_path) 137 { 138 return ezusb_ihex_firmware_download(dev, ezusb_fx1, firmware_path); 139 } 140 EXPORT_SYMBOL_GPL(ezusb_fx1_ihex_firmware_download); 141 142 #if 0 143 /* 144 * Once someone one needs these fx2 functions, uncomment them 145 * and add them to ezusb.h and all should be good. 146 */ 147 static struct ezusb_fx_type ezusb_fx2 = { 148 .cpucs_reg = 0xE600, 149 .max_internal_adress = 0x3FFF, 150 }; 151 152 int ezusb_fx2_set_reset(struct usb_device *dev, unsigned char reset_bit) 153 { 154 return ezusb_set_reset(dev, ezusb_fx2.cpucs_reg, reset_bit); 155 } 156 EXPORT_SYMBOL_GPL(ezusb_fx2_set_reset); 157 158 int ezusb_fx2_ihex_firmware_download(struct usb_device *dev, 159 const char *firmware_path) 160 { 161 return ezusb_ihex_firmware_download(dev, ezusb_fx2, firmware_path); 162 } 163 EXPORT_SYMBOL_GPL(ezusb_fx2_ihex_firmware_download); 164 #endif 165 166 MODULE_LICENSE("GPL"); 167