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