Adding Mentor USB core functionality and Mentor USB Host controller
functionality for Mentor USB OTG controller (musbhdrc).
Signed-off-by: Ravi Babu <ravib...@ti.com>
Signed-off-by: Swaminathan S <swami.i...@ti.com>
Signed-off-by: Thomas Abraham <t-abra...@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gu...@ti.com>
---
drivers/usb/Makefile | 1 +
drivers/usb/musb_core.c | 158 +++++++++++
drivers/usb/musb_core.h | 322 +++++++++++++++++++++
drivers/usb/musb_hcd.c | 708 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/usb/musb_hcd.h | 49 ++++
5 files changed, 1238 insertions(+), 0 deletions(-)
create mode 100644 drivers/usb/musb_core.c
create mode 100644 drivers/usb/musb_core.h
create mode 100644 drivers/usb/musb_hcd.c
create mode 100644 drivers/usb/musb_hcd.h
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 6ba154b..94eea70 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -35,6 +35,7 @@ COBJS-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
COBJS-$(CONFIG_USB_R8A66597_HCD) += r8a66597-hcd.o
COBJS-$(CONFIG_USB_SL811HS) += sl811_usb.o
COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
+COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
# device
ifdef CONFIG_USB_DEVICE
diff --git a/drivers/usb/musb_core.c b/drivers/usb/musb_core.c
new file mode 100644
index 0000000..4f3aff3
--- /dev/null
+++ b/drivers/usb/musb_core.c
@@ -0,0 +1,158 @@
+/*
+ * Mentor USB OTG Core functionality common for both host and Device
+ * functionality.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * 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
+ *
+ * Author: Thomas Abraham t-abra...@ti.com, Texas Instruments
+ */
+
+#include <common.h>
+
+#if defined(CONFIG_MUSB_HCD) || defined(CONFIG_MUSB_DEVICE)
+#include "musb_core.h"
+
+/*
+ * program the mentor core to start (enable interrupts, dma, etc.)
+ */
+void musb_start(void)
+{
+ u8 devctl;
+
+ /* disable all interrupts */
+ musb_writew(MUSB_INTRTXE, 0);
+ musb_writew(MUSB_INTRRXE, 0);
+ musb_writeb(MUSB_INTRUSBE, 0);
+ musb_writeb(MUSB_TESTMODE, 0);
+
+ /* put into basic highspeed mode and start session */
+ musb_writeb(MUSB_POWER, MUSB_POWER_HSENAB);
+#if defined(CONFIG_MUSB_HCD)
+ devctl = musb_readb(MUSB_DEVCTL);
+ musb_writeb(MUSB_DEVCTL, devctl | MUSB_DEVCTL_SESSION);
+#endif
+}
+
+/*
+ * This function configures the endpoint configuration. The musb hcd or musb
+ * device implementation can use this function to configure the Endpoints
+ * and set the FIFO sizes. Note: The summation of FIFO sizes of all endpoints
+ * should not be more than the available FIFO size.
+ *
+ * epinfo - Pointer to EP configuration table
+ * cnt - Number of entries in the EP conf table.
+ */
+void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt)
+{
+ u16 csr;
+ u16 fifoaddr = 64; /* First 64 bytes of FIFO reserved for EP0 */
+ u32 fifosize;
+ u8 idx;
+
+ while (cnt--) {
+ /* prepare fifosize to write to register */
+ fifosize = epinfo->epsize >> 3;
+ idx = ffs(fifosize) - 1;
+
+ musb_writeb(MUSB_INDEX, epinfo->epnum);
+ if (epinfo->epdir) {
+ /* Configure fifo size and fifo base address */
+ musb_writeb(MUSB_TXFIFOSZ, idx);
+ musb_writew(MUSB_TXFIFOADD, fifoaddr >> 3);
+
+#if defined(CONFIG_MUSB_HCD)
+ /* clear the data toggle bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR),
+ csr | MUSB_TXCSR_CLRDATATOG);
+#endif
+
+ /* Flush fifo if required */
+ if (csr & MUSB_TXCSR_TXPKTRDY) {
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR),
+ csr | MUSB_TXCSR_FLUSHFIFO);
+ }
+ } else {
+ /* Configure fifo size and fifo base address */
+ musb_writeb(MUSB_RXFIFOSZ, idx);
+ musb_writew(MUSB_RXFIFOADD, fifoaddr >> 3);
+
+#if defined(CONFIG_MUSB_HCD)
+ /* clear the data toggle bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ csr | MUSB_RXCSR_CLRDATATOG);
+#endif
+
+ /* Flush fifo if required */
+ if (csr & MUSB_RXCSR_RXPKTRDY) {
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ csr | MUSB_RXCSR_FLUSHFIFO);
+ }
+ }
+ fifoaddr += epinfo->epsize;
+ epinfo++;
+ }
+}
+
+/*
+ * This function writes data to endpoint fifo
+ *
+ * ep - Endpoint number
+ * length - Number of bytes to write to FIFO
+ * fifo_data - Pointer to data buffer that contains the data to write
+ */
+void write_fifo(u8 ep, u32 length, void *fifo_data)
+{
+ u32 address;
+ u8 *data = (u8 *)fifo_data;
+
+ /* select the endpoint index */
+ musb_writeb(MUSB_INDEX, ep);
+ address = MUSB_FIFO_OFFSET(ep);
+
+ /* write the data to the fifo */
+ while (length--)
+ musb_writeb(address, *data++);
+}
+
+/*
+ * This function reads data from endpoint fifo
+ *
+ * ep - Endpoint number
+ * length - Number of bytes to read from FIFO
+ * fifo_data - Pointer to data buffer into which data is read
+ */
+void read_fifo(u8 ep, u32 length, void *fifo_data)
+{
+ u32 address;
+ u8 *data = (u8 *)fifo_data;
+
+ /* select the endpoint index */
+ musb_writeb(MUSB_INDEX, ep);
+ address = MUSB_FIFO_OFFSET(ep);
+
+ /* read the data to the fifo */
+ while (length--)
+ *data++ = musb_readb(address);
+}
+
+#endif /* CONFIG_MUSB_HCD */
+
+
+
diff --git a/drivers/usb/musb_core.h b/drivers/usb/musb_core.h
new file mode 100644
index 0000000..d5fba54
--- /dev/null
+++ b/drivers/usb/musb_core.h
@@ -0,0 +1,322 @@
+/******************************************************************
+ * Copyright 2005 Mentor Graphics Corporation
+ * Copyright (C) 2005-2006 by Texas Instruments
+ *
+ * This file is part of the Inventra Controller Driver for Linux.
+ *
+ * The Inventra Controller Driver for Linux 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.
+ *
+ * The Inventra Controller Driver for Linux 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 The Inventra Controller Driver for Linux ; if not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place,
+ * Suite 330, Boston, MA 02111-1307 USA
+ *
+ * ANY DOWNLOAD, USE, REPRODUCTION, MODIFICATION OR DISTRIBUTION
+ * OF THIS DRIVER INDICATES YOUR COMPLETE AND UNCONDITIONAL ACCEPTANCE
+ * OF THOSE TERMS.THIS DRIVER IS PROVIDED "AS IS" AND MENTOR GRAPHICS
+ * MAKES NO WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THIS DRIVER.
+ * MENTOR GRAPHICS SPECIFICALLY DISCLAIMS ALL IMPLIED WARRANTIES
+ * OF MERCHANTABILITY; FITNESS FOR A PARTICULAR PURPOSE AND
+ * NON-INFRINGEMENT. MENTOR GRAPHICS DOES NOT PROVIDE SUPPORT
+ * SERVICES OR UPDATES FOR THIS DRIVER, EVEN IF YOU ARE A MENTOR
+ * GRAPHICS SUPPORT CUSTOMER.
+ ******************************************************************/
+
+#ifndef __MUSB_HDRC_DEFS_H__
+#define __MUSB_HDRC_DEFS_H__
+
+#include <usb.h>
+#include <usb_defs.h>
+
+#define MUSB_EP0_FIFOSIZE 64 /* This is non-configurable */
+
+/*
+ * Common USB registers
+ */
+
+#define MUSB_FADDR 0x00 /* 8-bit */
+#define MUSB_POWER 0x01 /* 8-bit */
+
+#define MUSB_INTRTX 0x02 /* 16-bit */
+#define MUSB_INTRRX 0x04
+#define MUSB_INTRTXE 0x06
+#define MUSB_INTRRXE 0x08
+#define MUSB_INTRUSB 0x0A /* 8 bit */
+#define MUSB_INTRUSBE 0x0B /* 8 bit */
+#define MUSB_FRAME 0x0C
+#define MUSB_INDEX 0x0E /* 8 bit */
+#define MUSB_TESTMODE 0x0F /* 8 bit */
+
+/* Get offset for a given FIFO from musb->mregs */
+#define MUSB_FIFO_OFFSET(epnum) (0x20 + ((epnum) * 4))
+
+/*
+ * Additional Control Registers
+ */
+#define MUSB_DEVCTL 0x60 /* 8 bit */
+
+/* These are always controlled through the INDEX register */
+#define MUSB_TXFIFOSZ 0x62 /* 8-bit (see masks) */
+#define MUSB_RXFIFOSZ 0x63 /* 8-bit (see masks) */
+#define MUSB_TXFIFOADD 0x64 /* 16-bit offset shifted right 3 */
+#define MUSB_RXFIFOADD 0x66 /* 16-bit offset shifted right 3 */
+
+/* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
+#define MUSB_HWVERS 0x6C /* 8 bit */
+
+#define MUSB_EPINFO 0x78 /* 8 bit */
+#define MUSB_RAMINFO 0x79 /* 8 bit */
+#define MUSB_LINKINFO 0x7a /* 8 bit */
+#define MUSB_VPLEN 0x7b /* 8 bit */
+#define MUSB_HS_EOF1 0x7c /* 8 bit */
+#define MUSB_FS_EOF1 0x7d /* 8 bit */
+#define MUSB_LS_EOF1 0x7e /* 8 bit */
+
+/* Offsets to endpoint registers */
+#define MUSB_TXMAXP 0x00
+#define MUSB_TXCSR 0x02
+#define MUSB_CSR0 MUSB_TXCSR /* Re-used for EP0 */
+#define MUSB_RXMAXP 0x04
+#define MUSB_RXCSR 0x06
+#define MUSB_RXCOUNT 0x08
+#define MUSB_COUNT0 MUSB_RXCOUNT /* Re-used for EP0 */
+#define MUSB_TXTYPE 0x0A
+#define MUSB_TYPE0 MUSB_TXTYPE /* Re-used for EP0 */
+#define MUSB_TXINTERVAL 0x0B
+#define MUSB_NAKLIMIT0 MUSB_TXINTERVAL /* Re-used for EP0 */
+#define MUSB_RXTYPE 0x0C
+#define MUSB_RXINTERVAL 0x0D
+#define MUSB_FIFOSIZE 0x0F
+#define MUSB_CONFIGDATA MUSB_FIFOSIZE /* Re-used for EP0 */
+
+/* Offsets to endpoint registers in indexed model (using INDEX register) */
+#define MUSB_INDEXED_OFFSET(_offset) \
+ (0x10 + (_offset))
+
+/* Offsets to endpoint registers in flat models */
+#define MUSB_FLAT_OFFSET(_epnum, _offset) \
+ (0x100 + (0x10*(_epnum)) + (_offset))
+
+/* "bus control"/target registers, for host side multipoint (external hubs) */
+#define MUSB_TXFUNCADDR 0x00
+#define MUSB_TXHUBADDR 0x02
+#define MUSB_TXHUBPORT 0x03
+
+#define MUSB_RXFUNCADDR 0x04
+#define MUSB_RXHUBADDR 0x06
+#define MUSB_RXHUBPORT 0x07
+
+#define MUSB_BUSCTL_OFFSET(_epnum, _offset) \
+ (0x80 + (8*(_epnum)) + (_offset))
+
+/*
+ * MUSB Register bits
+ */
+
+/* POWER */
+#define MUSB_POWER_ISOUPDATE 0x80
+#define MUSB_POWER_SOFTCONN 0x40
+#define MUSB_POWER_HSENAB 0x20
+#define MUSB_POWER_HSMODE 0x10
+#define MUSB_POWER_RESET 0x08
+#define MUSB_POWER_RESUME 0x04
+#define MUSB_POWER_SUSPENDM 0x02
+#define MUSB_POWER_ENSUSPEND 0x01
+#define MUSB_POWER_HSMODE_SHIFT 4
+
+
+/* INTRUSB */
+#define MUSB_INTR_SUSPEND 0x01
+#define MUSB_INTR_RESUME 0x02
+#define MUSB_INTR_RESET 0x04
+#define MUSB_INTR_BABBLE 0x04
+#define MUSB_INTR_SOF 0x08
+#define MUSB_INTR_CONNECT 0x10
+#define MUSB_INTR_DISCONNECT 0x20
+#define MUSB_INTR_SESSREQ 0x40
+#define MUSB_INTR_VBUSERROR 0x80 /* For SESSION end */
+
+/* DEVCTL */
+#define MUSB_DEVCTL_BDEVICE 0x80
+#define MUSB_DEVCTL_FSDEV 0x40
+#define MUSB_DEVCTL_LSDEV 0x20
+#define MUSB_DEVCTL_VBUS 0x18
+#define MUSB_DEVCTL_VBUS_SHIFT 3
+#define MUSB_DEVCTL_HM 0x04
+#define MUSB_DEVCTL_HR 0x02
+#define MUSB_DEVCTL_SESSION 0x01
+
+/* TESTMODE */
+#define MUSB_TEST_FORCE_HOST 0x80
+#define MUSB_TEST_FIFO_ACCESS 0x40
+#define MUSB_TEST_FORCE_FS 0x20
+#define MUSB_TEST_FORCE_HS 0x10
+#define MUSB_TEST_PACKET 0x08
+#define MUSB_TEST_K 0x04
+#define MUSB_TEST_J 0x02
+#define MUSB_TEST_SE0_NAK 0x01
+
+/* Allocate for double-packet buffering (effectively doubles assigned _SIZE) */
+#define MUSB_FIFOSZ_DPB 0x10
+/* Allocation size (8, 16, 32, ... 4096) */
+#define MUSB_FIFOSZ_SIZE 0x0f
+
+/* CSR0 */
+#define MUSB_CSR0_FLUSHFIFO 0x0100
+#define MUSB_CSR0_TXPKTRDY 0x0002
+#define MUSB_CSR0_RXPKTRDY 0x0001
+
+/* CSR0 in Peripheral mode */
+#define MUSB_CSR0_P_SVDSETUPEND 0x0080
+#define MUSB_CSR0_P_SVDRXPKTRDY 0x0040
+#define MUSB_CSR0_P_SENDSTALL 0x0020
+#define MUSB_CSR0_P_SETUPEND 0x0010
+#define MUSB_CSR0_P_DATAEND 0x0008
+#define MUSB_CSR0_P_SENTSTALL 0x0004
+
+/* CSR0 in Host mode */
+#define MUSB_CSR0_H_DIS_PING 0x0800
+#define MUSB_CSR0_H_WR_DATATOGGLE 0x0400 /* Set to allow setting: */
+#define MUSB_CSR0_H_DATATOGGLE 0x0200 /* Data toggle control */
+#define MUSB_CSR0_H_NAKTIMEOUT 0x0080
+#define MUSB_CSR0_H_STATUSPKT 0x0040
+#define MUSB_CSR0_H_REQPKT 0x0020
+#define MUSB_CSR0_H_ERROR 0x0010
+#define MUSB_CSR0_H_SETUPPKT 0x0008
+#define MUSB_CSR0_H_RXSTALL 0x0004
+
+/* CSR0 bits to avoid zeroing (write zero clears, write 1 ignored) */
+#define MUSB_CSR0_P_WZC_BITS \
+ (MUSB_CSR0_P_SENTSTALL)
+#define MUSB_CSR0_H_WZC_BITS \
+ (MUSB_CSR0_H_NAKTIMEOUT | MUSB_CSR0_H_RXSTALL \
+ | MUSB_CSR0_RXPKTRDY)
+
+/* TxType/RxType */
+#define MUSB_TYPE_SPEED 0xc0
+#define MUSB_TYPE_SPEED_SHIFT 6
+#define MUSB_TYPE_SPEED_HIGH 1
+#define MUSB_TYPE_SPEED_FULL 2
+#define MUSB_TYPE_SPEED_LOW 3
+#define MUSB_TYPE_PROTO 0x30 /* Implicitly zero for ep0 */
+#define MUSB_TYPE_PROTO_SHIFT 4
+#define MUSB_TYPE_REMOTE_END 0xf /* Implicitly zero for ep0 */
+#define MUSB_TYPE_PROTO_BULK 2
+
+/* CONFIGDATA */
+#define MUSB_CONFIGDATA_MPRXE 0x80 /* Auto bulk pkt combining */
+#define MUSB_CONFIGDATA_MPTXE 0x40 /* Auto bulk pkt splitting */
+#define MUSB_CONFIGDATA_BIGENDIAN 0x20
+#define MUSB_CONFIGDATA_HBRXE 0x10 /* HB-ISO for RX */
+#define MUSB_CONFIGDATA_HBTXE 0x08 /* HB-ISO for TX */
+#define MUSB_CONFIGDATA_DYNFIFO 0x04 /* Dynamic FIFO sizing
*/
+#define MUSB_CONFIGDATA_SOFTCONE 0x02 /* SoftConnect */
+#define MUSB_CONFIGDATA_UTMIDW 0x01 /* Data width 0/1 => 8/16bits */
+
+/* TXCSR in Peripheral and Host mode */
+#define MUSB_TXCSR_AUTOSET 0x8000
+#define MUSB_TXCSR_MODE 0x2000
+#define MUSB_TXCSR_DMAENAB 0x1000
+#define MUSB_TXCSR_FRCDATATOG 0x0800
+#define MUSB_TXCSR_DMAMODE 0x0400
+#define MUSB_TXCSR_CLRDATATOG 0x0040
+#define MUSB_TXCSR_FLUSHFIFO 0x0008
+#define MUSB_TXCSR_FIFONOTEMPTY 0x0002
+#define MUSB_TXCSR_TXPKTRDY 0x0001
+
+/* TXCSR in Peripheral mode */
+#define MUSB_TXCSR_P_ISO 0x4000
+#define MUSB_TXCSR_P_INCOMPTX 0x0080
+#define MUSB_TXCSR_P_SENTSTALL 0x0020
+#define MUSB_TXCSR_P_SENDSTALL 0x0010
+#define MUSB_TXCSR_P_UNDERRUN 0x0004
+
+/* TXCSR in Host mode */
+#define MUSB_TXCSR_H_WR_DATATOGGLE 0x0200
+#define MUSB_TXCSR_H_DATATOGGLE 0x0100
+#define MUSB_TXCSR_H_NAKTIMEOUT 0x0080
+#define MUSB_TXCSR_H_RXSTALL 0x0020
+#define MUSB_TXCSR_H_ERROR 0x0004
+#define MUSB_TXCSR_H_DATATOGGLE_SHIFT 8
+
+
+/* TXCSR bits to avoid zeroing (write zero clears, write 1 ignored) */
+#define MUSB_TXCSR_P_WZC_BITS \
+ (MUSB_TXCSR_P_INCOMPTX | MUSB_TXCSR_P_SENTSTALL \
+ | MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_FIFONOTEMPTY)
+#define MUSB_TXCSR_H_WZC_BITS \
+ (MUSB_TXCSR_H_NAKTIMEOUT | MUSB_TXCSR_H_RXSTALL \
+ | MUSB_TXCSR_H_ERROR | MUSB_TXCSR_FIFONOTEMPTY)
+
+/* RXCSR in Peripheral and Host mode */
+#define MUSB_RXCSR_AUTOCLEAR 0x8000
+#define MUSB_RXCSR_DMAENAB 0x2000
+#define MUSB_RXCSR_DISNYET 0x1000
+#define MUSB_RXCSR_PID_ERR 0x1000
+#define MUSB_RXCSR_DMAMODE 0x0800
+#define MUSB_RXCSR_INCOMPRX 0x0100
+#define MUSB_RXCSR_CLRDATATOG 0x0080
+#define MUSB_RXCSR_FLUSHFIFO 0x0010
+#define MUSB_RXCSR_DATAERROR 0x0008
+#define MUSB_RXCSR_FIFOFULL 0x0002
+#define MUSB_RXCSR_RXPKTRDY 0x0001
+
+/* RXCSR in Peripheral mode */
+#define MUSB_RXCSR_P_ISO 0x4000
+#define MUSB_RXCSR_P_SENTSTALL 0x0040
+#define MUSB_RXCSR_P_SENDSTALL 0x0020
+#define MUSB_RXCSR_P_OVERRUN 0x0004
+
+/* RXCSR in Host mode */
+#define MUSB_RXCSR_H_AUTOREQ 0x4000
+#define MUSB_RXCSR_H_WR_DATATOGGLE 0x0400
+#define MUSB_RXCSR_H_DATATOGGLE 0x0200
+#define MUSB_RXCSR_H_RXSTALL 0x0040
+#define MUSB_RXCSR_H_REQPKT 0x0020
+#define MUSB_RXCSR_H_ERROR 0x0004
+#define MUSB_S_RXCSR_H_DATATOGGLE 9
+
+/* RXCSR bits to avoid zeroing (write zero clears, write 1 ignored) */
+#define MUSB_RXCSR_P_WZC_BITS \
+ (MUSB_RXCSR_P_SENTSTALL | MUSB_RXCSR_P_OVERRUN \
+ | MUSB_RXCSR_RXPKTRDY)
+#define MUSB_RXCSR_H_WZC_BITS \
+ (MUSB_RXCSR_H_RXSTALL | MUSB_RXCSR_H_ERROR \
+ | MUSB_RXCSR_DATAERROR | MUSB_RXCSR_RXPKTRDY)
+
+/* HUBADDR */
+#define MUSB_HUBADDR_MULTI_TT 0x80
+
+/* Endpoint configuration information. Note: The value of endpoint fifo size
+ * element should be either 8,16,32,64,128,256,512,1024,2048 or 4096. Other
+ * values are not supported
+ */
+struct musb_epinfo {
+ u8 epnum; /* Endpoint number */
+ u8 epdir; /* Endpoint direction */
+ u16 epsize; /* Endpoint FIFO size */
+};
+
+/* exported functions */
+extern void musb_start(void);
+extern void musb_configure_ep(struct musb_epinfo *epinfo, u8 cnt);
+extern void write_fifo(u8 ep, u32 length, void *fifo_data);
+extern void read_fifo(u8 ep, u32 length, void *fifo_data);
+
+/* extern functions */
+extern inline void musb_writew(u32 offset, u16 value);
+extern inline void musb_writeb(u32 offset, u8 value);
+extern inline u16 musb_readw(u32 offset);
+extern inline u8 musb_readb(u32 offset);
+
+#endif /* __MUSB_HDRC_DEFS_H__ */
+
diff --git a/drivers/usb/musb_hcd.c b/drivers/usb/musb_hcd.c
new file mode 100644
index 0000000..ed93075
--- /dev/null
+++ b/drivers/usb/musb_hcd.c
@@ -0,0 +1,708 @@
+/*
+ * Mentor USB OTG Core host controller driver.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * 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
+ *
+ * Author: Thomas Abraham t-abra...@ti.com, Texas Instruments
+ */
+
+#include <common.h>
+
+#ifdef CONFIG_MUSB_HCD
+#include "musb_hcd.h"
+
+/* MSC control transfers */
+#define USB_MSC_BBB_RESET 0xFF
+#define USB_MSC_BBB_GET_MAX_LUN 0xFE
+
+/* speed negotiated with the connected device */
+static u8 musb_speed;
+
+/* Endpoint configuration information */
+static struct musb_epinfo epinfo[2] = {
+ {MUSB_BULK_EP, 1, 512}, /* EP1 - Bluk Out - 512 Bytes */
+ {MUSB_BULK_EP, 0, 512} /* EP1 - Bluk In - 512 Bytes */
+};
+
+/*
+ * This function writes the data toggle value.
+ */
+static void write_toggle(struct usb_device *dev, u8 ep, u8 dir_out)
+{
+ u16 toggle = usb_gettoggle(dev, ep, dir_out);
+ u16 csr;
+
+ if (dir_out) {
+ if (!toggle)
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR),
+ MUSB_TXCSR_CLRDATATOG);
+ else {
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ csr |= MUSB_TXCSR_H_WR_DATATOGGLE;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR), csr);
+ csr |= (toggle << MUSB_TXCSR_H_DATATOGGLE_SHIFT);
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR), csr);
+ }
+ } else {
+ if (!toggle)
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ MUSB_RXCSR_CLRDATATOG);
+ else {
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ csr |= MUSB_RXCSR_H_WR_DATATOGGLE;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR), csr);
+ csr |= (toggle << MUSB_S_RXCSR_H_DATATOGGLE);
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR), csr);
+ }
+ }
+}
+
+/*
+ * This function checks if RxStall has occured on the endpoint. If a RxStall
+ * has occured, the RxStall is cleared and 1 is returned. If RxStall has
+ * not occured, 0 is returned.
+ */
+static u8 check_stall(u8 ep, u8 dir_out)
+{
+ u16 csr;
+
+ /* For endpoint 0 */
+ if (!ep) {
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ if (csr & MUSB_CSR0_H_RXSTALL) {
+ csr &= ~MUSB_CSR0_H_RXSTALL;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+ return 1;
+ }
+ } else { /* For non-ep0 */
+ if (dir_out) { /* is it tx ep */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ if (csr & MUSB_TXCSR_H_RXSTALL) {
+ csr &= ~MUSB_TXCSR_H_RXSTALL;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR),
+ csr);
+ return 1;
+ }
+ } else { /* is it rx ep */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ if (csr & MUSB_RXCSR_H_RXSTALL) {
+ csr &= ~MUSB_RXCSR_H_RXSTALL;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ csr);
+ return 1;
+ }
+ }
+ }
+ return 0;
+}
+
+
+/*
+ * waits until ep0 is ready. Returns 0 if ep is ready, -1 for timeout
+ * error and -2 for stall.
+ */
+static int wait_until_ep0_ready(struct usb_device *dev, u32 bit_mask)
+{
+ u16 csr;
+ int result = 1;
+
+ while (result > 0) {
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ if (csr & MUSB_CSR0_H_ERROR) {
+ csr &= ~MUSB_CSR0_H_ERROR;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+ dev->status = USB_ST_CRC_ERR;
+ result = -1;
+ break;
+ }
+
+ switch (bit_mask) {
+ case MUSB_CSR0_TXPKTRDY:
+ if (!(csr & MUSB_CSR0_TXPKTRDY)) {
+ if (check_stall(MUSB_CONTROL_EP, 0)) {
+ dev->status = USB_ST_STALLED;
+ result = -2;
+ } else
+ result = 0;
+ }
+ break;
+
+ case MUSB_CSR0_RXPKTRDY:
+ if (check_stall(MUSB_CONTROL_EP, 0)) {
+ dev->status = USB_ST_STALLED;
+ result = -2;
+ } else
+ if (csr & MUSB_CSR0_RXPKTRDY)
+ result = 0;
+ break;
+
+ case MUSB_CSR0_H_REQPKT:
+ if (!(csr & MUSB_CSR0_H_REQPKT)) {
+ if (check_stall(MUSB_CONTROL_EP, 0)) {
+ dev->status = USB_ST_STALLED;
+ result = -2;
+ } else
+ result = 0;
+ }
+ break;
+ }
+ }
+ return result;
+}
+
+/*
+ * waits until tx ep is ready. Returns 1 when ep is ready and 0 on error.
+ */
+static u8 wait_until_txep_ready(struct usb_device *dev, u8 ep)
+{
+ u16 csr;
+
+ do {
+ if (check_stall(ep, 1)) {
+ dev->status = USB_ST_STALLED;
+ return 0;
+ }
+
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ if (csr & MUSB_TXCSR_H_ERROR) {
+ dev->status = USB_ST_CRC_ERR;
+ return 0;
+ }
+ } while (csr & MUSB_TXCSR_TXPKTRDY);
+ return 1;
+}
+
+/*
+ * waits until rx ep is ready. Returns 1 when ep is ready and 0 on error.
+ */
+static u8 wait_until_rxep_ready(struct usb_device *dev, u8 ep)
+{
+ u16 csr;
+
+ do {
+ if (check_stall(ep, 0)) {
+ dev->status = USB_ST_STALLED;
+ return 0;
+ }
+
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ if (csr & MUSB_RXCSR_H_ERROR) {
+ dev->status = USB_ST_CRC_ERR;
+ return 0;
+ }
+ } while (!(csr & MUSB_RXCSR_RXPKTRDY));
+ return 1;
+}
+
+/*
+ * This function performs the setup phase of the control transfer
+ */
+static int ctrlreq_setup_phase(struct usb_device *dev, struct devrequest
*setup)
+{
+ int result;
+ u16 csr;
+
+ /* write the control request to ep0 fifo */
+ write_fifo(MUSB_CONTROL_EP, sizeof(struct devrequest), (void *)setup);
+
+ /* enable transfer of setup packet */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ csr |= (MUSB_CSR0_TXPKTRDY|MUSB_CSR0_H_SETUPPKT);
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+
+ /* wait until the setup packet is transmitted */
+ result = wait_until_ep0_ready(dev, MUSB_CSR0_TXPKTRDY);
+ dev->act_len = 0;
+ return result;
+}
+
+/*
+ * This function handles the control transfer in data phase
+ */
+static int ctrlreq_in_data_phase(struct usb_device *dev, u32 len, void *buffer)
+{
+ u16 csr;
+ u32 rxlen = 0;
+ u32 nextlen = 0;
+ u8 maxpktsize = (1 << dev->maxpacketsize) * 8;
+ u8 *rxbuff = (u8 *)buffer;
+ u8 rxedlength;
+ int result;
+
+ while (rxlen < len) {
+ /* Determine the next read length */
+ nextlen = ((len-rxlen) > maxpktsize) ? maxpktsize : (len-rxlen);
+
+ /* Set the ReqPkt bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0),
+ csr | MUSB_CSR0_H_REQPKT);
+
+ result = wait_until_ep0_ready(dev, MUSB_CSR0_RXPKTRDY);
+ if (result < 0)
+ return result;
+
+ /* Actual number of bytes received by usb */
+ rxedlength = musb_readb(MUSB_INDEXED_OFFSET(MUSB_COUNT0));
+
+ /* Read the data from the RxFIFO */
+ read_fifo(MUSB_CONTROL_EP, rxedlength, &rxbuff[rxlen]);
+
+ /* Clear the RxPktRdy Bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ csr &= ~MUSB_CSR0_RXPKTRDY;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+
+ /* short packet? */
+ if (rxedlength != nextlen) {
+ dev->act_len += rxedlength;
+ break;
+ }
+ rxlen += nextlen;
+ dev->act_len = rxlen;
+ }
+ return 0;
+}
+
+/*
+ * This function handles the control transfer out data phase
+ */
+static int ctrlreq_out_data_phase(struct usb_device *dev, u32 len, void
*buffer)
+{
+ u16 csr;
+ u32 txlen = 0;
+ u32 nextlen = 0;
+ u8 maxpktsize = (1 << dev->maxpacketsize) * 8;
+ u8 *txbuff = (u8 *)buffer;
+ int result = 0;
+
+ while (txlen < len) {
+ /* Determine the next write length */
+ nextlen = ((len-txlen) > maxpktsize) ? maxpktsize : (len-txlen);
+
+ /* Load the data to send in FIFO */
+ write_fifo(MUSB_CONTROL_EP, txlen, &txbuff[txlen]);
+
+ /* Set TXPKTRDY bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0),
+ csr | MUSB_CSR0_H_DIS_PING | MUSB_CSR0_TXPKTRDY);
+
+ result = wait_until_ep0_ready(dev, MUSB_CSR0_TXPKTRDY);
+ if (result < 0)
+ break;
+
+ txlen += nextlen;
+ dev->act_len = txlen;
+ }
+ return result;
+}
+
+
+/*
+ * This function handles the control transfer out status phase
+ */
+static int ctrlreq_out_status_phase(struct usb_device *dev)
+{
+ u16 csr;
+ int result;
+
+ /* Set the StatusPkt bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ csr |= (MUSB_CSR0_H_DIS_PING | MUSB_CSR0_TXPKTRDY |
+ MUSB_CSR0_H_STATUSPKT);
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+
+ /* Wait until TXPKTRDY bit is cleared */
+ result = wait_until_ep0_ready(dev, MUSB_CSR0_TXPKTRDY);
+ return result;
+}
+
+
+/*
+ * This function handles the control transfer in status phase
+ */
+static int ctrlreq_in_status_phase(struct usb_device *dev)
+{
+ u16 csr;
+ int result;
+
+ /* Set the StatusPkt bit and ReqPkt bit */
+ csr = MUSB_CSR0_H_DIS_PING | MUSB_CSR0_H_REQPKT | MUSB_CSR0_H_STATUSPKT;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+ result = wait_until_ep0_ready(dev, MUSB_CSR0_H_REQPKT);
+
+ /* clear StatusPkt bit and RxPktRdy bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+ csr &= ~(MUSB_CSR0_RXPKTRDY | MUSB_CSR0_H_STATUSPKT);
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_CSR0), csr);
+ return result;
+}
+
+
+/*
+ * determines the speed of the device (High/Full/Slow)
+ */
+static u8 get_dev_speed(struct usb_device *dev)
+{
+ return (dev->speed & USB_SPEED_HIGH) ? MUSB_TYPE_SPEED_HIGH :
+ ((dev->speed & USB_SPEED_LOW) ? MUSB_TYPE_SPEED_LOW :
+ MUSB_TYPE_SPEED_FULL);
+}
+
+/*
+ * configure the hub address and the port address.
+ */
+static void config_hub_port(struct usb_device *dev, u8 ep)
+{
+ u8 chid;
+ u8 hub;
+
+ /* Find out the nearest parent which is high speed */
+ while (dev->parent->parent != NULL)
+ if (get_dev_speed(dev->parent) != MUSB_TYPE_SPEED_HIGH)
+ dev = dev->parent;
+ else
+ break;
+
+ /* determine the port address at that hub */
+ hub = dev->parent->devnum;
+ for (chid = 0; chid < USB_MAXCHILDREN; chid++)
+ if (dev->parent->children[chid] == dev)
+ break;
+
+ /* configure the hub address and the port address */
+ musb_writeb(MUSB_BUSCTL_OFFSET(ep, MUSB_TXHUBADDR), hub);
+ musb_writeb(MUSB_BUSCTL_OFFSET(ep, MUSB_TXHUBPORT), (chid + 1));
+ musb_writeb(MUSB_BUSCTL_OFFSET(ep, MUSB_RXHUBADDR), hub);
+ musb_writeb(MUSB_BUSCTL_OFFSET(ep, MUSB_RXHUBPORT), (chid + 1));
+}
+
+/*
+ * do a control transfer
+ */
+int submit_control_msg(struct usb_device *dev, unsigned long pipe, void
*buffer,
+ int len, struct devrequest *setup)
+{
+ int devnum = usb_pipedevice(pipe);
+ u16 csr;
+ u8 devspeed;
+
+ /* select control endpoint */
+ musb_writeb(MUSB_INDEX, MUSB_CONTROL_EP);
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_CSR0));
+
+ /* target addr and (for multipoint) hub addr/port */
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP, MUSB_TXFUNCADDR),
+ devnum);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP, MUSB_RXFUNCADDR),
+ devnum);
+
+ /* configure the hub address and the port number as required */
+ devspeed = get_dev_speed(dev);
+ if ((musb_ishighspeed()) && (dev->parent != NULL) &&
+ (devspeed != MUSB_TYPE_SPEED_HIGH)) {
+ config_hub_port(dev, MUSB_CONTROL_EP);
+ musb_writeb(MUSB_INDEXED_OFFSET(MUSB_TYPE0), devspeed << 6);
+ } else {
+ musb_writeb(MUSB_INDEXED_OFFSET(MUSB_TYPE0), musb_speed << 6);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP,
+ MUSB_TXHUBADDR), 0);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP,
+ MUSB_TXHUBPORT), 0);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP,
+ MUSB_RXHUBADDR), 0);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_CONTROL_EP,
+ MUSB_RXHUBPORT), 0);
+ }
+
+ /* Control transfer setup phase */
+ if (ctrlreq_setup_phase(dev, setup) < 0)
+ return 0;
+
+ switch (setup->request) {
+ case USB_REQ_GET_DESCRIPTOR:
+ case USB_REQ_GET_CONFIGURATION:
+ case USB_REQ_GET_INTERFACE:
+ case USB_REQ_GET_STATUS:
+ case USB_MSC_BBB_GET_MAX_LUN:
+ /* control transfer in-data-phase */
+ if (ctrlreq_in_data_phase(dev, len, buffer) < 0)
+ return 0;
+ /* control transfer out-status-phase */
+ if (ctrlreq_out_status_phase(dev) < 0)
+ return 0;
+ break;
+
+ case USB_REQ_SET_ADDRESS:
+ case USB_REQ_SET_CONFIGURATION:
+ case USB_REQ_SET_FEATURE:
+ case USB_REQ_SET_INTERFACE:
+ case USB_REQ_CLEAR_FEATURE:
+ case USB_MSC_BBB_RESET:
+ /* control transfer in status phase */
+ if (ctrlreq_in_status_phase(dev) < 0)
+ return 0;
+ break;
+
+ case USB_REQ_SET_DESCRIPTOR:
+ /* control transfer out data phase */
+ if (ctrlreq_out_data_phase(dev, len, buffer) < 0)
+ return 0;
+ /* control transfer in status phase */
+ if (ctrlreq_in_status_phase(dev) < 0)
+ return 0;
+ break;
+
+ default:
+ /* unhandled control transfer */
+ return -1;
+ }
+
+ dev->status = 0;
+ dev->act_len = len;
+ return len;
+}
+
+/*
+ * do a bulk transfer
+ */
+int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
+ void *buffer, int len)
+{
+ int dir_out = usb_pipeout(pipe);
+ int ep = usb_pipeendpoint(pipe);
+ int devnum = usb_pipedevice(pipe);
+ u8 type;
+ u16 csr;
+ u32 txlen = 0;
+ u32 nextlen = 0;
+ u8 devspeed;
+
+ /* select bulk endpoint */
+ musb_writeb(MUSB_INDEX, MUSB_BULK_EP);
+
+ /* write the address of the device */
+ if (dir_out)
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_TXFUNCADDR), devnum);
+ else
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_RXFUNCADDR), devnum);
+
+ /* configure the hub address and the port number as required */
+ devspeed = get_dev_speed(dev);
+ if ((musb_ishighspeed()) && (dev->parent != NULL) &&
+ (devspeed != MUSB_TYPE_SPEED_HIGH)) {
+ /*
+ * MUSB is in high speed and the destination device is full
+ * speed device. So configure the hub address and port
+ * address registers.
+ */
+ config_hub_port(dev, MUSB_BULK_EP);
+ } else {
+ if (dir_out) {
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_TXHUBADDR), 0);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_TXHUBPORT), 0);
+ } else {
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_RXHUBADDR), 0);
+ musb_writeb(MUSB_BUSCTL_OFFSET(MUSB_BULK_EP,
+ MUSB_RXHUBPORT), 0);
+ }
+ devspeed = musb_speed;
+ }
+
+ /* Write the saved toggle bit value */
+ write_toggle(dev, ep, dir_out);
+
+ if (dir_out) { /* bulk-out transfer */
+ /* Program the TxType register */
+ type = (devspeed << MUSB_TYPE_SPEED_SHIFT) |
+ (MUSB_TYPE_PROTO_BULK << MUSB_TYPE_PROTO_SHIFT) |
+ (ep & MUSB_TYPE_REMOTE_END);
+ musb_writeb(MUSB_INDEXED_OFFSET(MUSB_TXTYPE), type);
+
+ /* Write maximum packet size to the TxMaxp register */
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXMAXP),
+ dev->epmaxpacketout[ep]);
+
+ while (txlen < len) {
+ nextlen = ((len-txlen) < dev->epmaxpacketout[ep]) ?
+ (len-txlen) : dev->epmaxpacketout[ep];
+
+ /* Write the data to the FIFO */
+ write_fifo(MUSB_BULK_EP, nextlen,
+ (void *)(((u8 *)buffer) + txlen));
+
+ /* Set the TxPktRdy bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_TXCSR),
+ csr | MUSB_TXCSR_TXPKTRDY);
+
+ /* Wait until the TxPktRdy bit is cleared */
+ if (!wait_until_txep_ready(dev, MUSB_BULK_EP)) {
+ csr = musb_readw(
+ MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ usb_settoggle(dev, ep, dir_out,
+ (csr >> MUSB_TXCSR_H_DATATOGGLE_SHIFT) & 1);
+ dev->act_len = txlen;
+ return 0;
+ }
+ txlen += nextlen;
+ }
+
+ /* Keep a copy of the data toggle bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_TXCSR));
+ usb_settoggle(dev, ep, dir_out,
+ (csr >> MUSB_TXCSR_H_DATATOGGLE_SHIFT) & 1);
+ } else { /* bulk-in transfer */
+ /* Write the saved toggle bit value */
+ write_toggle(dev, ep, dir_out);
+
+ /* Program the RxType register */
+ type = (devspeed << MUSB_TYPE_SPEED_SHIFT) |
+ (MUSB_TYPE_PROTO_BULK << MUSB_TYPE_PROTO_SHIFT) |
+ (ep & MUSB_TYPE_REMOTE_END);
+ musb_writeb(MUSB_INDEXED_OFFSET(MUSB_RXTYPE), type);
+
+ /* Write the maximum packet size to the RxMaxp register */
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXMAXP),
+ dev->epmaxpacketin[ep]);
+
+ while (txlen < len) {
+ nextlen = ((len-txlen) < dev->epmaxpacketin[ep]) ?
+ (len-txlen) : dev->epmaxpacketin[ep];
+
+ /* Set the ReqPkt bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ MUSB_RXCSR_H_REQPKT);
+
+ /* Wait until the RxPktRdy bit is set */
+ if (!wait_until_rxep_ready(dev, MUSB_BULK_EP)) {
+ csr = musb_readw(
+ MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ usb_settoggle(dev, ep, dir_out,
+ (csr >> MUSB_S_RXCSR_H_DATATOGGLE) & 1);
+ csr &= ~MUSB_RXCSR_RXPKTRDY;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR),
+ csr);
+ dev->act_len = txlen;
+ return 0;
+ }
+
+ /* Read the data from the FIFO */
+ read_fifo(MUSB_BULK_EP, nextlen,
+ (void *)(((u8 *)buffer) + txlen));
+
+ /* Clear the RxPktRdy bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ csr &= ~MUSB_RXCSR_RXPKTRDY;
+ musb_writew(MUSB_INDEXED_OFFSET(MUSB_RXCSR), csr);
+ txlen += nextlen;
+ }
+
+ /* Keep a copy of the data toggle bit */
+ csr = musb_readw(MUSB_INDEXED_OFFSET(MUSB_RXCSR));
+ usb_settoggle(dev, ep, dir_out,
+ (csr >> MUSB_S_RXCSR_H_DATATOGGLE) & 1);
+ }
+
+ /* bulk transfer is complete */
+ dev->status = 0;
+ dev->act_len = len;
+ return 0;
+}
+
+/*
+ * This function initializes the usb controller module.
+ */
+int usb_lowlevel_init(void)
+{
+ u8 power;
+ u32 timeout;
+
+ if (musb_platform_init() == -1)
+ return -1;
+
+ /* Configure all the endpoint FIFO's and start usb controller */
+ musb_configure_ep(&epinfo[0],
+ sizeof(epinfo) / sizeof(struct musb_epinfo));
+ musb_start();
+
+ /*
+ * Wait until musb is enabled in host mode with a timeout. There
+ * should be a usb device connected.
+ */
+ timeout = MUSB_HCD_TIMEOUT;
+ while (timeout--)
+ if (musb_readb(MUSB_DEVCTL) & MUSB_DEVCTL_HM)
+ break;
+
+ /* if musb core is not in host mode, then return */
+ if (!timeout)
+ return -1;
+
+ /* start usb bus reset */
+ power = musb_readb(MUSB_POWER);
+ musb_writeb(MUSB_POWER, power | MUSB_POWER_RESET);
+
+ /* After initiating a usb reset, wait for about 20ms to 30ms */
+ udelay(30000);
+
+ /* stop usb bus reset */
+ power = musb_readb(MUSB_POWER);
+ power &= ~MUSB_POWER_RESET;
+ musb_writeb(MUSB_POWER, power);
+
+ /* Determine if the connected device is a high/full/low speed device */
+ musb_speed = (musb_readb(MUSB_POWER) & MUSB_POWER_HSMODE) ?
+ MUSB_TYPE_SPEED_HIGH :
+ ((musb_readb(MUSB_DEVCTL) & MUSB_DEVCTL_FSDEV) ?
+ MUSB_TYPE_SPEED_FULL : MUSB_TYPE_SPEED_LOW);
+ return 0;
+}
+
+/*
+ * This function stops the operation of the davinci usb module.
+ */
+int usb_lowlevel_stop(void)
+{
+ /* Reset the USB module */
+ musb_platform_deinit();
+ musb_writeb(MUSB_DEVCTL, 0);
+ return 0;
+}
+
+/*
+ * This function supports usb interrupt transfers. Currently, usb interrupt
+ * transfers are not supported.
+ */
+int submit_int_msg(struct usb_device *dev, unsigned long pipe,
+ void *buffer, int len, int interval)
+{
+ return -1;
+}
+
+#endif /* CONFIG_MUSB_HCD */
+
+
+
diff --git a/drivers/usb/musb_hcd.h b/drivers/usb/musb_hcd.h
new file mode 100644
index 0000000..8ca26e7
--- /dev/null
+++ b/drivers/usb/musb_hcd.h
@@ -0,0 +1,49 @@
+/*
+ * Mentor USB OTG Core host controller driver.
+ *
+ * Copyright (c) 2008 Texas Instruments
+ *
+ * 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
+ *
+ * Author: Thomas Abraham t-abra...@ti.com, Texas Instruments
+ */
+
+#ifndef __MUSB_HCD_H__
+#define __MUSB_HCD_H__
+
+#include "musb_core.h"
+
+/* The controller driver polls for changes in the state. This defines a timeout
+ for cases where the states do not change so the appropriate error can be
+ returned. */
+#define MUSB_HCD_TIMEOUT 0x3FFFFFF
+
+/* This defines the endpoint number used for control transfers */
+#define MUSB_CONTROL_EP 0
+
+/* This defines the endpoint number used for bulk transfer */
+#define MUSB_BULK_EP 1
+
+/* Determine the operating speed of MUSB core */
+#define musb_ishighspeed() \
+ ((musb_readb(MUSB_POWER) & MUSB_POWER_HSMODE) \
+ >> MUSB_POWER_HSMODE_SHIFT)
+
+/* extern functions */
+extern int musb_platform_init(void);
+extern void musb_platform_deinit(void);
+
+#endif /* __MUSB_HCD_H__ */
--
1.5.6
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