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usb : musb : Adding host controller driver for Mentor USB controller

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Adding Mentor USB core functionality and Mentor USB Host controller
functionality for Mentor USB OTG controller (musbhdrc).

Signed-off-by: Ravi Babu <ravibabu@ti.com>
Signed-off-by: Swaminathan S <swami.iyer@ti.com>
Signed-off-by: Thomas Abraham <t-abraham@ti.com>
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: Remy Bohmer <linux@bohmer.net>
master
Thomas Abraham 17 years ago committed by Remy Bohmer
parent c7d703f3f3
commit a142896934
5 changed files with 1302 additions and 0 deletions
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  1. 1
      drivers/usb/Makefile
  2. 141
      drivers/usb/musb_core.c
  3. 317
      drivers/usb/musb_core.h
  4. 792
      drivers/usb/musb_hcd.c
  5. 51
      drivers/usb/musb_hcd.h

1
drivers/usb/Makefile
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@ -37,6 +37,7 @@ COBJS-$(CONFIG_USB_SL811HS) += sl811_usb.o
COBJS-$(CONFIG_USB_EHCI_FSL) += usb_ehci_fsl.o
COBJS-$(CONFIG_USB_EHCI_PCI) += usb_ehci_pci.o
COBJS-$(CONFIG_USB_EHCI_IXP4XX) += usb_ehci_ixp.o
COBJS-$(CONFIG_MUSB_HCD) += musb_hcd.o musb_core.o
# device
ifdef CONFIG_USB_DEVICE

141
drivers/usb/musb_core.c
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/*
* 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-abraham@ti.com, Texas Instruments
*/
#include <common.h>
#include "musb_core.h"
struct musb_regs *musbr;
/*
* program the mentor core to start (enable interrupts, dma, etc.)
*/
void musb_start(void)
{
u8 devctl;
/* disable all interrupts */
writew(0, &musbr->intrtxe);
writew(0, &musbr->intrrxe);
writeb(0, &musbr->intrusbe);
writeb(0, &musbr->testmode);
/* put into basic highspeed mode and start session */
writeb(MUSB_POWER_HSENAB, &musbr->power);
#if defined(CONFIG_MUSB_HCD)
devctl = readb(&musbr->devctl);
writeb(devctl | MUSB_DEVCTL_SESSION, &musbr->devctl);
#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;
writeb(epinfo->epnum, &musbr->index);
if (epinfo->epdir) {
/* Configure fifo size and fifo base address */
writeb(idx, &musbr->txfifosz);
writew(fifoaddr >> 3, &musbr->txfifoadd);
#if defined(CONFIG_MUSB_HCD)
/* clear the data toggle bit */
csr = readw(&musbr->txcsr);
writew(csr | MUSB_TXCSR_CLRDATATOG, &musbr->txcsr);
#endif
/* Flush fifo if required */
if (csr & MUSB_TXCSR_TXPKTRDY)
writew(csr | MUSB_TXCSR_FLUSHFIFO,
&musbr->txcsr);
} else {
/* Configure fifo size and fifo base address */
writeb(idx, &musbr->rxfifosz);
writew(fifoaddr >> 3, &musbr->rxfifoadd);
#if defined(CONFIG_MUSB_HCD)
/* clear the data toggle bit */
csr = readw(&musbr->rxcsr);
writew(csr | MUSB_RXCSR_CLRDATATOG, &musbr->rxcsr);
#endif
/* Flush fifo if required */
if (csr & MUSB_RXCSR_RXPKTRDY)
writew(csr | MUSB_RXCSR_FLUSHFIFO,
&musbr->rxcsr);
}
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)
{
u8 *data = (u8 *)fifo_data;
/* select the endpoint index */
writeb(ep, &musbr->index);
/* write the data to the fifo */
while (length--)
writeb(*data++, &musbr->fifox[ep]);
}
/*
* 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)
{
u8 *data = (u8 *)fifo_data;
/* select the endpoint index */
writeb(ep, &musbr->index);
/* read the data to the fifo */
while (length--)
*data++ = readb(&musbr->fifox[ep]);
}

317
drivers/usb/musb_core.h
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/******************************************************************
* Copyright 2008 Mentor Graphics Corporation
* Copyright (C) 2008 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>
#include <asm/io.h>
#define MUSB_EP0_FIFOSIZE 64 /* This is non-configurable */
/* Mentor USB core register overlay structure */
struct musb_regs {
/* common registers */
u8 faddr;
u8 power;
u16 intrtx;
u16 intrrx;
u16 intrtxe;
u16 intrrxe;
u8 intrusb;
u8 intrusbe;
u16 frame;
u8 index;
u8 testmode;
/* indexed registers */
u16 txmaxp;
u16 txcsr;
u16 rxmaxp;
u16 rxcsr;
u16 rxcount;
u8 txtype;
u8 txinterval;
u8 rxtype;
u8 rxinterval;
u8 reserved0;
u8 fifosize;
/* fifo */
u32 fifox[16];
/* OTG, dynamic FIFO, version & vendor registers */
u8 devctl;
u8 reserved1;
u8 txfifosz;
u8 rxfifosz;
u16 txfifoadd;
u16 rxfifoadd;
u32 vcontrol;
u16 hwvers;
u16 reserved2[5];
u8 epinfo;
u8 raminfo;
u8 linkinfo;
u8 vplen;
u8 hseof1;
u8 fseof1;
u8 lseof1;
u8 reserved3;
/* target address registers */
struct musb_tar_regs {
u8 txfuncaddr;
u8 reserved0;
u8 txhubaddr;
u8 txhubport;
u8 rxfuncaddr;
u8 reserved1;
u8 rxhubaddr;
u8 rxhubport;
} tar[16];
} __attribute((aligned(32)));
/*
* 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
#define MUSB_TYPE_PROTO_INTR 3
/* 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 */
};
/*
* Platform specific MUSB configuration. Any platform using the musb
* functionality should create one instance of this structure in the
* platform specific file.
*/
struct musb_config {
struct musb_regs *regs;
u32 timeout;
u8 musb_speed;
};
/* externally defined data */
extern struct musb_config musb_cfg;
extern struct musb_regs *musbr;
/* 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__ */

792
drivers/usb/musb_hcd.c
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/*
* 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-abraham@ti.com, Texas Instruments
*/
#include <common.h>
#include "musb_hcd.h"
/* MSC control transfers */
#define USB_MSC_BBB_RESET 0xFF
#define USB_MSC_BBB_GET_MAX_LUN 0xFE
/* Endpoint configuration information */
static struct musb_epinfo epinfo[3] = {
{MUSB_BULK_EP, 1, 512}, /* EP1 - Bluk Out - 512 Bytes */
{MUSB_BULK_EP, 0, 512}, /* EP1 - Bluk In - 512 Bytes */
{MUSB_INTR_EP, 0, 64} /* EP2 - Interrupt IN - 64 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)
writew(MUSB_TXCSR_CLRDATATOG, &musbr->txcsr);
else {
csr = readw(&musbr->txcsr);
csr |= MUSB_TXCSR_H_WR_DATATOGGLE;
writew(csr, &musbr->txcsr);
csr |= (toggle << MUSB_TXCSR_H_DATATOGGLE_SHIFT);
writew(csr, &musbr->txcsr);
}
} else {
if (!toggle)
writew(MUSB_RXCSR_CLRDATATOG, &musbr->rxcsr);
else {
csr = readw(&musbr->rxcsr);
csr |= MUSB_RXCSR_H_WR_DATATOGGLE;
writew(csr, &musbr->rxcsr);
csr |= (toggle << MUSB_S_RXCSR_H_DATATOGGLE);
writew(csr, &musbr->rxcsr);
}
}
}
/*
* 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 = readw(&musbr->txcsr);
if (csr & MUSB_CSR0_H_RXSTALL) {
csr &= ~MUSB_CSR0_H_RXSTALL;
writew(csr, &musbr->txcsr);
return 1;
}
} else { /* For non-ep0 */
if (dir_out) { /* is it tx ep */
csr = readw(&musbr->txcsr);
if (csr & MUSB_TXCSR_H_RXSTALL) {
csr &= ~MUSB_TXCSR_H_RXSTALL;
writew(csr, &musbr->txcsr);
return 1;
}
} else { /* is it rx ep */
csr = readw(&musbr->rxcsr);
if (csr & MUSB_RXCSR_H_RXSTALL) {
csr &= ~MUSB_RXCSR_H_RXSTALL;
writew(csr, &musbr->rxcsr);
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 = readw(&musbr->txcsr);
if (csr & MUSB_CSR0_H_ERROR) {
csr &= ~MUSB_CSR0_H_ERROR;
writew(csr, &musbr->txcsr);
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 = readw(&musbr->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 = readw(&musbr->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 = readw(&musbr->txcsr);
csr |= (MUSB_CSR0_TXPKTRDY|MUSB_CSR0_H_SETUPPKT);
writew(csr, &musbr->txcsr);
/* 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 = readw(&musbr->txcsr);
writew(csr | MUSB_CSR0_H_REQPKT, &musbr->txcsr);
result = wait_until_ep0_ready(dev, MUSB_CSR0_RXPKTRDY);
if (result < 0)
return result;
/* Actual number of bytes received by usb */
rxedlength = readb(&musbr->rxcount);
/* Read the data from the RxFIFO */
read_fifo(MUSB_CONTROL_EP, rxedlength, &rxbuff[rxlen]);
/* Clear the RxPktRdy Bit */
csr = readw(&musbr->txcsr);
csr &= ~MUSB_CSR0_RXPKTRDY;
writew(csr, &musbr->txcsr);
/* 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 = readw(&musbr->txcsr);
writew(csr | MUSB_CSR0_H_DIS_PING | MUSB_CSR0_TXPKTRDY,
&musbr->txcsr);
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 = readw(&musbr->txcsr);
csr |= (MUSB_CSR0_H_DIS_PING | MUSB_CSR0_TXPKTRDY |
MUSB_CSR0_H_STATUSPKT);
writew(csr, &musbr->txcsr);
/* 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;
writew(csr, &musbr->txcsr);
result = wait_until_ep0_ready(dev, MUSB_CSR0_H_REQPKT);
/* clear StatusPkt bit and RxPktRdy bit */
csr = readw(&musbr->txcsr);
csr &= ~(MUSB_CSR0_RXPKTRDY | MUSB_CSR0_H_STATUSPKT);
writew(csr, &musbr->txcsr);
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 */
writeb(hub, &musbr->tar[ep].txhubaddr);
writeb((chid + 1), &musbr->tar[ep].txhubport);
writeb(hub, &musbr->tar[ep].rxhubaddr);
writeb((chid + 1), &musbr->tar[ep].rxhubport);
}
/*
* 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 */
writeb(MUSB_CONTROL_EP, &musbr->index);
csr = readw(&musbr->txcsr);
/* target addr and (for multipoint) hub addr/port */
writeb(devnum, &musbr->tar[MUSB_CONTROL_EP].txfuncaddr);
writeb(devnum, &musbr->tar[MUSB_CONTROL_EP].rxfuncaddr);
/* 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);
writeb(devspeed << 6, &musbr->txtype);
} else {
writeb(musb_cfg.musb_speed << 6, &musbr->txtype);
writeb(0, &musbr->tar[MUSB_CONTROL_EP].txhubaddr);
writeb(0, &musbr->tar[MUSB_CONTROL_EP].txhubport);
writeb(0, &musbr->tar[MUSB_CONTROL_EP].rxhubaddr);
writeb(0, &musbr->tar[MUSB_CONTROL_EP].rxhubport);
}
/* 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 */
writeb(MUSB_BULK_EP, &musbr->index);
/* write the address of the device */
if (dir_out)
writeb(devnum, &musbr->tar[MUSB_BULK_EP].txfuncaddr);
else
writeb(devnum, &musbr->tar[MUSB_BULK_EP].rxfuncaddr);
/* 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) {
writeb(0, &musbr->tar[MUSB_BULK_EP].txhubaddr);
writeb(0, &musbr->tar[MUSB_BULK_EP].txhubport);
} else {
writeb(0, &musbr->tar[MUSB_BULK_EP].rxhubaddr);
writeb(0, &musbr->tar[MUSB_BULK_EP].rxhubport);
}
devspeed = musb_cfg.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);
writeb(type, &musbr->txtype);
/* Write maximum packet size to the TxMaxp register */
writew(dev->epmaxpacketout[ep], &musbr->txmaxp);
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 = readw(&musbr->txcsr);
writew(csr | MUSB_TXCSR_TXPKTRDY, &musbr->txcsr);
/* Wait until the TxPktRdy bit is cleared */
if (!wait_until_txep_ready(dev, MUSB_BULK_EP)) {
readw(&musbr->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 = readw(&musbr->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);
writeb(type, &musbr->rxtype);
/* Write the maximum packet size to the RxMaxp register */
writew(dev->epmaxpacketin[ep], &musbr->rxmaxp);
while (txlen < len) {
nextlen = ((len-txlen) < dev->epmaxpacketin[ep]) ?
(len-txlen) : dev->epmaxpacketin[ep];
/* Set the ReqPkt bit */
writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
/* Wait until the RxPktRdy bit is set */
if (!wait_until_rxep_ready(dev, MUSB_BULK_EP)) {
csr = readw(&musbr->rxcsr);
usb_settoggle(dev, ep, dir_out,
(csr >> MUSB_S_RXCSR_H_DATATOGGLE) & 1);
csr &= ~MUSB_RXCSR_RXPKTRDY;
writew(csr, &musbr->rxcsr);
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 = readw(&musbr->rxcsr);
csr &= ~MUSB_RXCSR_RXPKTRDY;
writew(csr, &musbr->rxcsr);
txlen += nextlen;
}
/* Keep a copy of the data toggle bit */
csr = readw(&musbr->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 */
musbr = musb_cfg.regs;
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_cfg.timeout;
while (timeout--)
if (readb(&musbr->devctl) & MUSB_DEVCTL_HM)
break;
/* if musb core is not in host mode, then return */
if (!timeout)
return -1;
/* start usb bus reset */
power = readb(&musbr->power);
writeb(power | MUSB_POWER_RESET, &musbr->power);
/* After initiating a usb reset, wait for about 20ms to 30ms */
udelay(30000);
/* stop usb bus reset */
power = readb(&musbr->power);
power &= ~MUSB_POWER_RESET;
writeb(power, &musbr->power);
/* Determine if the connected device is a high/full/low speed device */
musb_cfg.musb_speed = (readb(&musbr->power) & MUSB_POWER_HSMODE) ?
MUSB_TYPE_SPEED_HIGH :
((readb(&musbr->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();
writeb(0, &musbr->devctl);
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)
{
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 interrupt endpoint */
writeb(MUSB_INTR_EP, &musbr->index);
/* write the address of the device */
if (dir_out)
writeb(devnum, &musbr->tar[MUSB_INTR_EP].txfuncaddr);
else
writeb(devnum, &musbr->tar[MUSB_INTR_EP].rxfuncaddr);
/* 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_INTR_EP);
} else {
if (dir_out) {
writeb(0, &musbr->tar[MUSB_INTR_EP].txhubaddr);
writeb(0, &musbr->tar[MUSB_INTR_EP].txhubport);
} else {
writeb(0, &musbr->tar[MUSB_INTR_EP].rxhubaddr);
writeb(0, &musbr->tar[MUSB_INTR_EP].rxhubport);
}
devspeed = musb_cfg.musb_speed;
}
/* Write the saved toggle bit value */
write_toggle(dev, ep, dir_out);
if (!dir_out) { /* intrrupt-in transfer */
/* Write the saved toggle bit value */
write_toggle(dev, ep, dir_out);
writeb(interval, &musbr->rxinterval);
/* Program the RxType register */
type = (devspeed << MUSB_TYPE_SPEED_SHIFT) |
(MUSB_TYPE_PROTO_INTR << MUSB_TYPE_PROTO_SHIFT) |
(ep & MUSB_TYPE_REMOTE_END);
writeb(type, &musbr->rxtype);
/* Write the maximum packet size to the RxMaxp register */
writew(dev->epmaxpacketin[ep], &musbr->rxmaxp);
while (txlen < len) {
nextlen = ((len-txlen) < dev->epmaxpacketin[ep]) ?
(len-txlen) : dev->epmaxpacketin[ep];
/* Set the ReqPkt bit */
writew(MUSB_RXCSR_H_REQPKT, &musbr->rxcsr);
/* Wait until the RxPktRdy bit is set */
if (!wait_until_rxep_ready(dev, MUSB_INTR_EP)) {
csr = readw(&musbr->rxcsr);
usb_settoggle(dev, ep, dir_out,
(csr >> MUSB_S_RXCSR_H_DATATOGGLE) & 1);
csr &= ~MUSB_RXCSR_RXPKTRDY;
writew(csr, &musbr->rxcsr);
dev->act_len = txlen;
return 0;
}
/* Read the data from the FIFO */
read_fifo(MUSB_INTR_EP, nextlen,
(void *)(((u8 *)buffer) + txlen));
/* Clear the RxPktRdy bit */
csr = readw(&musbr->rxcsr);
csr &= ~MUSB_RXCSR_RXPKTRDY;
writew(csr, &musbr->rxcsr);
txlen += nextlen;
}
/* Keep a copy of the data toggle bit */
csr = readw(&musbr->rxcsr);
usb_settoggle(dev, ep, dir_out,
(csr >> MUSB_S_RXCSR_H_DATATOGGLE) & 1);
}
/* interrupt transfer is complete */
dev->irq_status = 0;
dev->irq_act_len = len;
dev->irq_handle(dev);
dev->status = 0;
dev->act_len = len;
return 0;
}
#ifdef CONFIG_SYS_USB_EVENT_POLL
/*
* This function polls for USB keyboard data.
*/
void usb_event_poll()
{
device_t *dev;
struct usb_device *usb_kbd_dev;
struct usb_interface_descriptor *iface;
struct usb_endpoint_descriptor *ep;
int pipe;
int maxp;
/* Get the pointer to USB Keyboard device pointer */
dev = device_get_by_name("usbkbd");
usb_kbd_dev = (struct usb_device *)dev->priv;
iface = &usb_kbd_dev->config.if_desc[0];
ep = &iface->ep_desc[0];
pipe = usb_rcvintpipe(usb_kbd_dev, ep->bEndpointAddress);
/* Submit a interrupt transfer request */
maxp = usb_maxpacket(usb_kbd_dev, pipe);
usb_submit_int_msg(usb_kbd_dev, pipe, &new[0],
maxp > 8 ? 8 : maxp, ep->bInterval);
}
#endif /* CONFIG_SYS_USB_EVENT_POLL */

51
drivers/usb/musb_hcd.h
Unescape View File

@ -0,0 +1,51 @@
/*
* 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-abraham@ti.com, Texas Instruments
*/
#ifndef __MUSB_HCD_H__
#define __MUSB_HCD_H__
#include "musb_core.h"
#ifdef CONFIG_USB_KEYBOARD
#include <devices.h>
extern unsigned char new[];
#endif
/* 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
/* This defines the endpoint number used for interrupt transfer */
#define MUSB_INTR_EP 2
/* Determine the operating speed of MUSB core */
#define musb_ishighspeed() \
((readb(&musbr->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__ */
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