[RT2x00]: add driver for Ralink wireless hardware

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 180 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00usb.h b/drivers/net/wireless/rt2x00/rt2x00usb.h
new file mode 100644
index 000000000000..d4113e5158f0
--- /dev/null
+++ b/drivers/net/wireless/rt2x00/rt2x00usb.h
@@ -0,0 +1,180 @@
+/*
+        Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
+        <http://rt2x00.serialmonkey.com>
+
+        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; either version 2 of the License, or
+        (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+        GNU General Public License for more details.
+
+        You should have received a copy of the GNU General Public License
+        along with this program; if not, write to the
+        Free Software Foundation, Inc.,
+        59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*
+        Module: rt2x00usb
+        Abstract: Data structures for the rt2x00usb module.
+ */
+
+#ifndef RT2X00USB_H
+#define RT2X00USB_H
+
+/*
+ * This variable should be used with the
+ * usb_driver structure initialization.
+ */
+#define USB_DEVICE_DATA(__ops)  .driver_info = (kernel_ulong_t)(__ops)
+
+/*
+ * Register defines.
+ * Some registers require multiple attempts before success,
+ * in those cases REGISTER_BUSY_COUNT attempts should be
+ * taken with a REGISTER_BUSY_DELAY interval.
+ * For USB vendor requests we need to pass a timeout
+ * time in ms, for this we use the REGISTER_TIMEOUT,
+ * however when loading firmware a higher value is
+ * required. In that case we use the REGISTER_TIMEOUT_FIRMWARE.
+ */
+#define REGISTER_BUSY_COUNT             5
+#define REGISTER_BUSY_DELAY             100
+#define REGISTER_TIMEOUT                20
+#define REGISTER_TIMEOUT_FIRMWARE       1000
+
+/*
+ * Cache size
+ */
+#define CSR_CACHE_SIZE                  8
+#define CSR_CACHE_SIZE_FIRMWARE         64
+
+/*
+ * USB request types.
+ */
+#define USB_VENDOR_REQUEST      ( USB_TYPE_VENDOR | USB_RECIP_DEVICE )
+#define USB_VENDOR_REQUEST_IN   ( USB_DIR_IN | USB_VENDOR_REQUEST )
+#define USB_VENDOR_REQUEST_OUT  ( USB_DIR_OUT | USB_VENDOR_REQUEST )
+
+/*
+ * USB vendor commands.
+ */
+#define USB_DEVICE_MODE         0x01
+#define USB_SINGLE_WRITE        0x02
+#define USB_SINGLE_READ         0x03
+#define USB_MULTI_WRITE         0x06
+#define USB_MULTI_READ          0x07
+#define USB_EEPROM_WRITE        0x08
+#define USB_EEPROM_READ         0x09
+#define USB_LED_CONTROL         0x0a    /* RT73USB */
+#define USB_RX_CONTROL          0x0c
+
+/*
+ * Device modes offset
+ */
+#define USB_MODE_RESET          0x01
+#define USB_MODE_UNPLUG         0x02
+#define USB_MODE_FUNCTION       0x03
+#define USB_MODE_TEST           0x04
+#define USB_MODE_SLEEP          0x07    /* RT73USB */
+#define USB_MODE_FIRMWARE       0x08    /* RT73USB */
+#define USB_MODE_WAKEUP         0x09    /* RT73USB */
+
+/*
+ * Used to read/write from/to the device.
+ * This is the main function to communicate with the device,
+ * the buffer argument _must_ either be NULL or point to
+ * a buffer allocated by kmalloc. Failure to do so can lead
+ * to unexpected behavior depending on the architecture.
+ */
+int rt2x00usb_vendor_request(const struct rt2x00_dev *rt2x00dev,
+                             const u8 request, const u8 requesttype,
+                             const u16 offset, const u16 value,
+                             void *buffer, const u16 buffer_length,
+                             u16 timeout);
+
+/*
+ * Used to read/write from/to the device.
+ * This function will use a previously with kmalloc allocated cache
+ * to communicate with the device. The contents of the buffer pointer
+ * will be copied to this cache when writing, or read from the cache
+ * when reading.
+ * Buffers send to rt2x00usb_vendor_request _must_ be allocated with
+ * kmalloc. Hence the reason for using a previously allocated cache
+ * which has been allocated properly.
+ */
+int rt2x00usb_vendor_request_buff(const struct rt2x00_dev *rt2x00dev,
+                                  const u8 request, const u8 requesttype,
+                                  const u16 offset, void *buffer,
+                                  const u16 buffer_length, u16 timeout);
+
+/*
+ * Simple wrapper around rt2x00usb_vendor_request to write a single
+ * command to the device. Since we don't use the buffer argument we
+ * don't have to worry about kmalloc here.
+ */
+static inline int rt2x00usb_vendor_request_sw(const struct rt2x00_dev
+                                              *rt2x00dev,
+                                              const u8 request,
+                                              const u16 offset,
+                                              const u16 value,
+                                              int timeout)
+{
+        return rt2x00usb_vendor_request(rt2x00dev, request,
+                                        USB_VENDOR_REQUEST_OUT, offset,
+                                        value, NULL, 0, timeout);
+}
+
+/*
+ * Simple wrapper around rt2x00usb_vendor_request to read the eeprom
+ * from the device. Note that the eeprom argument _must_ be allocated using
+ * kmalloc for correct handling inside the kernel USB layer.
+ */
+static inline int rt2x00usb_eeprom_read(const struct rt2x00_dev *rt2x00dev,
+                                         __le16 *eeprom, const u16 lenght)
+{
+        int timeout = REGISTER_TIMEOUT * (lenght / sizeof(u16));
+
+        return rt2x00usb_vendor_request(rt2x00dev, USB_EEPROM_READ,
+                                        USB_VENDOR_REQUEST_IN, 0x0000,
+                                        0x0000, eeprom, lenght, timeout);
+}
+
+/*
+ * Radio handlers
+ */
+void rt2x00usb_enable_radio(struct rt2x00_dev *rt2x00dev);
+void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev);
+
+/*
+ * TX data handlers.
+ */
+int rt2x00usb_write_tx_data(struct rt2x00_dev *rt2x00dev,
+                            struct data_ring *ring, struct sk_buff *skb,
+                            struct ieee80211_tx_control *control);
+
+/*
+ * Device initialization handlers.
+ */
+int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev);
+void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev);
+
+/*
+ * USB driver handlers.
+ */
+int rt2x00usb_probe(struct usb_interface *usb_intf,
+                    const struct usb_device_id *id);
+void rt2x00usb_disconnect(struct usb_interface *usb_intf);
+#ifdef CONFIG_PM
+int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state);
+int rt2x00usb_resume(struct usb_interface *usb_intf);
+#else
+#define rt2x00usb_suspend       NULL
+#define rt2x00usb_resume        NULL
+#endif /* CONFIG_PM */
+
+#endif /* RT2X00USB_H */