[PATCH] USB: add lh7a40x_udc driver

This patch implements the USB client controller (UDC) driver from scratch on
the LPD-LH7A40X development boards.
Signed-off-by: Bo Henriksen <bo.henriksen@nordicid.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>

drivers/usb/gadget/Kconfig

@@ -135,6 +135,18 @@ config USB_SA1100
 	depends on USB_GADGET_SA1100
 	default USB_GADGET
 
+config USB_GADGET_LH7A40X
+	boolean "LH7A40X"
+	depends on ARCH_LH7A40X
+	help
+    This driver provides USB Device Controller driver for LH7A40x
+
+config USB_LH7A40X
+	tristate
+	depends on USB_GADGET_LH7A40X
+	default USB_GADGET
+
+
 config USB_GADGET_DUMMY_HCD
 	boolean "Dummy HCD (DEVELOPMENT)"
 	depends on USB && EXPERIMENTAL

drivers/usb/gadget/lh7a40x_udc.h

+/*
+ * linux/drivers/usb/gadget/lh7a40x_udc.h
+ * Sharp LH7A40x on-chip full speed USB device controllers
+ *
+ * Copyright (C) 2004 Mikko Lahteenmaki, Nordic ID
+ * Copyright (C) 2004 Bo Henriksen, Nordic ID
+ *
+ * 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 __LH7A40X_H_
+#define __LH7A40X_H_
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/version.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/byteorder.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+#include <asm/hardware.h>
+
+#include <linux/usb_ch9.h>
+#include <linux/usb_gadget.h>
+
+/*
+ * Memory map
+ */
+
+#define USB_FA					0x80000200	// function address register
+#define USB_PM					0x80000204	// power management register
+
+#define USB_IN_INT				0x80000208	// IN interrupt register bank (EP0-EP3)
+#define USB_OUT_INT				0x80000210	// OUT interrupt register bank (EP2)
+#define USB_INT					0x80000218	// interrupt register bank
+
+#define USB_IN_INT_EN			0x8000021C	// IN interrupt enable register bank
+#define USB_OUT_INT_EN			0x80000224	// OUT interrupt enable register bank
+#define USB_INT_EN				0x8000022C	// USB interrupt enable register bank
+
+#define USB_FRM_NUM1			0x80000230	// Frame number1 register
+#define USB_FRM_NUM2			0x80000234	// Frame number2 register
+#define USB_INDEX				0x80000238	// index register
+
+#define USB_IN_MAXP				0x80000240	// IN MAXP register
+#define USB_IN_CSR1				0x80000244	// IN CSR1 register/EP0 CSR register
+#define USB_EP0_CSR				0x80000244	// IN CSR1 register/EP0 CSR register
+#define USB_IN_CSR2				0x80000248	// IN CSR2 register
+#define USB_OUT_MAXP			0x8000024C	// OUT MAXP register
+
+#define USB_OUT_CSR1			0x80000250	// OUT CSR1 register
+#define USB_OUT_CSR2			0x80000254	// OUT CSR2 register
+#define USB_OUT_FIFO_WC1		0x80000258	// OUT FIFO write count1 register
+#define USB_OUT_FIFO_WC2		0x8000025C	// OUT FIFO write count2 register
+
+#define USB_RESET				0x8000044C	// USB reset register
+
+#define	USB_EP0_FIFO			0x80000280
+#define	USB_EP1_FIFO			0x80000284
+#define	USB_EP2_FIFO			0x80000288
+#define	USB_EP3_FIFO			0x8000028c
+
+/*
+ * USB reset register
+ */
+#define USB_RESET_APB			(1<<1)	//resets USB APB control side WRITE
+#define USB_RESET_IO			(1<<0)	//resets USB IO side WRITE
+
+/*
+ * USB function address register
+ */
+#define USB_FA_ADDR_UPDATE		(1<<7)
+#define USB_FA_FUNCTION_ADDR	(0x7F)
+
+/*
+ * Power Management register
+ */
+#define PM_USB_DCP				(1<<5)
+#define PM_USB_ENABLE			(1<<4)
+#define PM_USB_RESET			(1<<3)
+#define PM_UC_RESUME			(1<<2)
+#define PM_SUSPEND_MODE			(1<<1)
+#define PM_ENABLE_SUSPEND		(1<<0)
+
+/*
+ * IN interrupt register
+ */
+#define USB_IN_INT_EP3				(1<<3)
+#define USB_IN_INT_EP1				(1<<1)
+#define USB_IN_INT_EP0				(1<<0)
+
+/*
+ * OUT interrupt register
+ */
+#define USB_OUT_INT_EP2				(1<<2)
+
+/*
+ * USB interrupt register
+ */
+#define USB_INT_RESET_INT			(1<<2)
+#define USB_INT_RESUME_INT			(1<<1)
+#define USB_INT_SUSPEND_INT			(1<<0)
+
+/*
+ * USB interrupt enable register
+ */
+#define USB_INT_EN_USB_RESET_INTER		(1<<2)
+#define USB_INT_EN_RESUME_INTER			(1<<1)
+#define USB_INT_EN_SUSPEND_INTER		(1<<0)
+
+/*
+ * INCSR1 register
+ */
+#define USB_IN_CSR1_CLR_DATA_TOGGLE		(1<<6)
+#define USB_IN_CSR1_SENT_STALL			(1<<5)
+#define USB_IN_CSR1_SEND_STALL			(1<<4)
+#define USB_IN_CSR1_FIFO_FLUSH			(1<<3)
+#define USB_IN_CSR1_FIFO_NOT_EMPTY		(1<<1)
+#define USB_IN_CSR1_IN_PKT_RDY			(1<<0)
+
+/*
+ * INCSR2 register
+ */
+#define USB_IN_CSR2_AUTO_SET			(1<<7)
+#define USB_IN_CSR2_USB_DMA_EN			(1<<4)
+
+/*
+ * OUT CSR1 register
+ */
+#define USB_OUT_CSR1_CLR_DATA_REG		(1<<7)
+#define USB_OUT_CSR1_SENT_STALL			(1<<6)
+#define USB_OUT_CSR1_SEND_STALL			(1<<5)
+#define USB_OUT_CSR1_FIFO_FLUSH			(1<<4)
+#define USB_OUT_CSR1_FIFO_FULL			(1<<1)
+#define USB_OUT_CSR1_OUT_PKT_RDY		(1<<0)
+
+/*
+ * OUT CSR2 register
+ */
+#define USB_OUT_CSR2_AUTO_CLR			(1<<7)
+#define USB_OUT_CSR2_USB_DMA_EN			(1<<4)
+
+/*
+ * EP0 CSR
+ */
+#define EP0_CLR_SETUP_END		(1<<7)	/* Clear "Setup Ends" Bit (w) */
+#define EP0_CLR_OUT				(1<<6)	/* Clear "Out packet ready" Bit (w) */
+#define EP0_SEND_STALL			(1<<5)	/* Send STALL Handshake (rw) */
+#define EP0_SETUP_END			(1<<4)	/* Setup Ends (r) */
+
+#define EP0_DATA_END			(1<<3)	/* Data end (rw) */
+#define EP0_SENT_STALL			(1<<2)	/* Sent Stall Handshake (r) */
+#define EP0_IN_PKT_RDY			(1<<1)	/* In packet ready (rw) */
+#define EP0_OUT_PKT_RDY			(1<<0)	/* Out packet ready (r) */
+
+/* general CSR */
+#define OUT_PKT_RDY		(1<<0)
+#define IN_PKT_RDY		(1<<0)
+
+/*
+ * IN/OUT MAXP register
+ */
+#define USB_OUT_MAXP_MAXP			(0xF)
+#define USB_IN_MAXP_MAXP			(0xF)
+
+// Max packet size
+//#define EP0_PACKETSIZE        0x10
+#define EP0_PACKETSIZE  	0x8
+#define EP0_MAXPACKETSIZE  	0x10
+
+#define UDC_MAX_ENDPOINTS       4
+
+#define WAIT_FOR_SETUP          0
+#define DATA_STATE_XMIT         1
+#define DATA_STATE_NEED_ZLP     2
+#define WAIT_FOR_OUT_STATUS     3
+#define DATA_STATE_RECV         4
+
+/* ********************************************************************************************* */
+/* IO
+ */
+
+typedef enum ep_type {
+	ep_control, ep_bulk_in, ep_bulk_out, ep_interrupt
+} ep_type_t;
+
+struct lh7a40x_ep {
+	struct usb_ep ep;
+	struct lh7a40x_udc *dev;
+
+	const struct usb_endpoint_descriptor *desc;
+	struct list_head queue;
+	unsigned long pio_irqs;
+
+	u8 stopped;
+	u8 bEndpointAddress;
+	u8 bmAttributes;
+
+	ep_type_t ep_type;
+	u32 fifo;
+	u32 csr1;
+	u32 csr2;
+};
+
+struct lh7a40x_request {
+	struct usb_request req;
+	struct list_head queue;
+};
+
+struct lh7a40x_udc {
+	struct usb_gadget gadget;
+	struct usb_gadget_driver *driver;
+	struct device *dev;
+	spinlock_t lock;
+
+	int ep0state;
+	struct lh7a40x_ep ep[UDC_MAX_ENDPOINTS];
+
+	unsigned char usb_address;
+
+	unsigned req_pending:1, req_std:1, req_config:1;
+};
+
+extern struct lh7a40x_udc *the_controller;
+
+#define ep_is_in(EP) 		(((EP)->bEndpointAddress&USB_DIR_IN)==USB_DIR_IN)
+#define ep_index(EP) 		((EP)->bEndpointAddress&0xF)
+#define ep_maxpacket(EP) 	((EP)->ep.maxpacket)
+
+#endif