USB Gadget driver for Samsung s3c2410 ARM SoC

This patch adds the support for the Usb Device Controller on Samsung
S3C24xx SoCs.  This driver passes all tests from testusb (including #13)
and has been tested on S3C2410, S3C24212, and S3C2440 SoCs.

Whitespace updates, minor cleanups by David

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 110 insertions, 0 deletions

diff --git a/drivers/usb/gadget/s3c2410_udc.h b/drivers/usb/gadget/s3c2410_udc.h
new file mode 100644
index 000000000000..9e0bece4f241
--- /dev/null
+++ b/drivers/usb/gadget/s3c2410_udc.h
@@ -0,0 +1,110 @@
+/*
+ * linux/drivers/usb/gadget/s3c2410_udc.h
+ * Samsung on-chip full speed USB device controllers
+ *
+ * Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
+ *      Additional cleanups by Ben Dooks <ben-linux@fluff.org>
+ *
+ * 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
+ *
+ */
+
+#ifndef _S3C2410_UDC_H
+#define _S3C2410_UDC_H
+
+struct s3c2410_ep {
+        struct list_head                queue;
+        unsigned long                   last_io;        /* jiffies timestamp */
+        struct usb_gadget               *gadget;
+        struct s3c2410_udc              *dev;
+        const struct usb_endpoint_descriptor *desc;
+        struct usb_ep                   ep;
+        u8                              num;
+
+        unsigned short                  fifo_size;
+        u8                              bEndpointAddress;
+        u8                              bmAttributes;
+
+        unsigned                        halted : 1;
+        unsigned                        already_seen : 1;
+        unsigned                        setup_stage : 1;
+};
+
+
+/* Warning : ep0 has a fifo of 16 bytes */
+/* Don't try to set 32 or 64            */
+/* also testusb 14 fails  wit 16 but is */
+/* fine with 8                          */
+#define EP0_FIFO_SIZE            8
+#define EP_FIFO_SIZE            64
+#define DEFAULT_POWER_STATE     0x00
+
+#define S3C2440_EP_FIFO_SIZE    128
+
+static const char ep0name [] = "ep0";
+
+static const char *const ep_name[] = {
+        ep0name,                                /* everyone has ep0 */
+        /* s3c2410 four bidirectional bulk endpoints */
+        "ep1-bulk", "ep2-bulk", "ep3-bulk", "ep4-bulk",
+};
+
+#define S3C2410_ENDPOINTS       ARRAY_SIZE(ep_name)
+
+struct s3c2410_request {
+        struct list_head                queue;          /* ep's requests */
+        struct usb_request              req;
+};
+
+enum ep0_state {
+        EP0_IDLE,
+        EP0_IN_DATA_PHASE,
+        EP0_OUT_DATA_PHASE,
+        EP0_END_XFER,
+        EP0_STALL,
+};
+
+static const char *ep0states[]= {
+        "EP0_IDLE",
+        "EP0_IN_DATA_PHASE",
+        "EP0_OUT_DATA_PHASE",
+        "EP0_END_XFER",
+        "EP0_STALL",
+};
+
+struct s3c2410_udc {
+        spinlock_t                      lock;
+
+        struct s3c2410_ep               ep[S3C2410_ENDPOINTS];
+        int                             address;
+        struct usb_gadget               gadget;
+        struct usb_gadget_driver        *driver;
+        struct s3c2410_request          fifo_req;
+        u8                              fifo_buf[EP_FIFO_SIZE];
+        u16                             devstatus;
+
+        u32                             port_status;
+        int                             ep0state;
+
+        unsigned                        got_irq : 1;
+
+        unsigned                        req_std : 1;
+        unsigned                        req_config : 1;
+        unsigned                        req_pending : 1;
+        u8                              vbus;
+        struct dentry                   *regs_info;
+};
+
+#endif