USB: ezusb: move ezusb.c from drivers/usb/serial to drivers/usb/misc

This patch
- moves drivers/usb/serial/ezusb.c to drivers/usb/misc/
- renamed CONFIG_USB_EZUSB to CONFIG_USB_EZUSB_FX2 to avoid build errors
- adapts Makefiles and Kconfigs switching from bool to tristate for CONFIG_USB_EZUSB_FX2

Signed-off-by: René Bürgel <rene.buergel@sohard.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 160 insertions, 0 deletions

diff --git a/drivers/usb/misc/ezusb.c b/drivers/usb/misc/ezusb.c
new file mode 100644
index 000000000000..4223d761223d
--- /dev/null
+++ b/drivers/usb/misc/ezusb.c
@@ -0,0 +1,160 @@
+/*
+ * 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);
+