Gitiles
Code Review Sign In
gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / c9f72b3da8855c3c9679c821127cccd91e0380ed / . / drivers / usb / host / isp116x-hcd.c
blob: 7aff54bce172c3423a667e87068b1eb68fbdfcb9 [file] [log] [blame]
/*
* ISP116x HCD (Host Controller Driver) for u-boot.
*
* Copyright (C) 2006-2007 Rodolfo Giometti <giometti@linux.it>
* Copyright (C) 2006-2007 Eurotech S.p.A. <info@eurotech.it>
*
* 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
*
*
* Derived in part from the SL811 HCD driver "u-boot/drivers/usb/sl811_usb.c"
* (original copyright message follows):
*
* (C) Copyright 2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* This code is based on linux driver for sl811hs chip, source at
* drivers/usb/host/sl811.c:
*
* SL811 Host Controller Interface driver for USB.
*
* Copyright (c) 2003/06, Courage Co., Ltd.
*
* Based on:
* 1.uhci.c by Linus Torvalds, Johannes Erdfelt, Randy Dunlap,
* Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber,
* Adam Richter, Gregory P. Smith;
* 2.Original SL811 driver (hc_sl811.o) by Pei Liu <pbl@cypress.com>
* 3.Rewrited as sl811.o by Yin Aihua <yinah:couragetech.com.cn>
*
* [[GNU/GPL disclaimer]]
*
* and in part from AU1x00 OHCI HCD driver "u-boot/cpu/mips/au1x00_usb_ohci.c"
* (original copyright message follows):
*
* URB OHCI HCD (Host Controller Driver) for USB on the AU1x00.
*
* (C) Copyright 2003
* Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
*
* [[GNU/GPL disclaimer]]
*
* Note: Part of this code has been derived from linux
*/
#include <common.h>
#include <asm/io.h>
#include <usb.h>
#include <malloc.h>
#include <linux/list.h>
/*
* ISP116x chips require certain delays between accesses to its
* registers. The following timing options exist.
*
* 1. Configure your memory controller (the best)
* 2. Use ndelay (easiest, poorest). For that, enable the following macro.
*
* Value is in microseconds.
*/
#ifdef ISP116X_HCD_USE_UDELAY
#define UDELAY 1
#endif
/*
* On some (slowly?) machines an extra delay after data packing into
* controller's FIFOs is required, * otherwise you may get the following
* error:
*
* uboot> usb start
* (Re)start USB...
* USB: scanning bus for devices... isp116x: isp116x_submit_job: CTL:TIMEOUT
* isp116x: isp116x_submit_job: ****** FIFO not ready! ******
*
* USB device not responding, giving up (status=4)
* isp116x: isp116x_submit_job: ****** FIFO not empty! ******
* isp116x: isp116x_submit_job: ****** FIFO not empty! ******
* isp116x: isp116x_submit_job: ****** FIFO not empty! ******
* 3 USB Device(s) found
* scanning bus for storage devices... 0 Storage Device(s) found
*
* Value is in milliseconds.
*/
#ifdef ISP116X_HCD_USE_EXTRA_DELAY
#define EXTRA_DELAY 2
#endif
/*
* Enable the following defines if you wish enable debugging messages.
*/
#undef DEBUG /* enable debugging messages */
#undef TRACE /* enable tracing code */
#undef VERBOSE /* verbose debugging messages */
#include "isp116x.h"
#define DRIVER_VERSION "08 Jan 2007"
static const char hcd_name[] = "isp116x-hcd";
struct isp116x isp116x_dev;
struct isp116x_platform_data isp116x_board;
static int got_rhsc; /* root hub status change */
struct usb_device *devgone; /* device which was disconnected */
static int rh_devnum; /* address of Root Hub endpoint */
/* ------------------------------------------------------------------------- */
#define ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL))
#define min_t(type,x,y) \
({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
/* ------------------------------------------------------------------------- */
static int isp116x_reset(struct isp116x *isp116x);
/* --- Debugging functions ------------------------------------------------- */
#define isp116x_show_reg(d, r) { \
if ((r) < 0x20) { \
DBG("%-12s[%02x]: %08x", #r, \
r, isp116x_read_reg32(d, r)); \
} else { \
DBG("%-12s[%02x]: %04x", #r, \
r, isp116x_read_reg16(d, r)); \
} \
}
#define isp116x_show_regs(d) { \
isp116x_show_reg(d, HCREVISION); \
isp116x_show_reg(d, HCCONTROL); \
isp116x_show_reg(d, HCCMDSTAT); \
isp116x_show_reg(d, HCINTSTAT); \
isp116x_show_reg(d, HCINTENB); \
isp116x_show_reg(d, HCFMINTVL); \
isp116x_show_reg(d, HCFMREM); \
isp116x_show_reg(d, HCFMNUM); \
isp116x_show_reg(d, HCLSTHRESH); \
isp116x_show_reg(d, HCRHDESCA); \
isp116x_show_reg(d, HCRHDESCB); \
isp116x_show_reg(d, HCRHSTATUS); \
isp116x_show_reg(d, HCRHPORT1); \
isp116x_show_reg(d, HCRHPORT2); \
isp116x_show_reg(d, HCHWCFG); \
isp116x_show_reg(d, HCDMACFG); \
isp116x_show_reg(d, HCXFERCTR); \
isp116x_show_reg(d, HCuPINT); \
isp116x_show_reg(d, HCuPINTENB); \
isp116x_show_reg(d, HCCHIPID); \
isp116x_show_reg(d, HCSCRATCH); \
isp116x_show_reg(d, HCITLBUFLEN); \
isp116x_show_reg(d, HCATLBUFLEN); \
isp116x_show_reg(d, HCBUFSTAT); \
isp116x_show_reg(d, HCRDITL0LEN); \
isp116x_show_reg(d, HCRDITL1LEN); \
}
#if defined(TRACE)
static int isp116x_get_current_frame_number(struct usb_device *usb_dev)
{
struct isp116x *isp116x = &isp116x_dev;
return isp116x_read_reg32(isp116x, HCFMNUM);
}
static void dump_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, char *str)
{
#if defined(VERBOSE)
int i;
#endif
DBG("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d stat:%#lx",
str,
isp116x_get_current_frame_number(dev),
usb_pipedevice(pipe),
usb_pipeendpoint(pipe),
usb_pipeout(pipe) ? 'O' : 'I',
usb_pipetype(pipe) < 2 ?
(usb_pipeint(pipe) ?
"INTR" : "ISOC") :
(usb_pipecontrol(pipe) ? "CTRL" : "BULK"), len, dev->status);
#if defined(VERBOSE)
if (len > 0 && buffer) {
printf(__FILE__ ": data(%d):", len);
for (i = 0; i < 16 && i < len; i++)
printf(" %02x", ((__u8 *) buffer)[i]);
printf("%s\n", i < len ? "..." : "");
}
#endif
}
#define PTD_DIR_STR(ptd) ({char __c; \
switch(PTD_GET_DIR(ptd)){ \
case 0: __c = 's'; break; \
case 1: __c = 'o'; break; \
default: __c = 'i'; break; \
}; __c;})
/*
Dump PTD info. The code documents the format
perfectly, right :)
*/
static inline void dump_ptd(struct ptd *ptd)
{
#if defined(VERBOSE)
int k;
#endif
DBG("PTD(ext) : cc:%x %d%c%d %d,%d,%d t:%x %x%x%x",
PTD_GET_CC(ptd),
PTD_GET_FA(ptd), PTD_DIR_STR(ptd), PTD_GET_EP(ptd),
PTD_GET_COUNT(ptd), PTD_GET_LEN(ptd), PTD_GET_MPS(ptd),
PTD_GET_TOGGLE(ptd),
PTD_GET_ACTIVE(ptd), PTD_GET_SPD(ptd), PTD_GET_LAST(ptd));
#if defined(VERBOSE)
printf("isp116x: %s: PTD(byte): ", __FUNCTION__);
for (k = 0; k < sizeof(struct ptd); ++k)
printf("%02x ", ((u8 *) ptd)[k]);
printf("\n");
#endif
}
static inline void dump_ptd_data(struct ptd *ptd, u8 * buf, int type)
{
#if defined(VERBOSE)
int k;
if (type == 0 /* 0ut data */ ) {
printf("isp116x: %s: out data: ", __FUNCTION__);
for (k = 0; k < PTD_GET_LEN(ptd); ++k)
printf("%02x ", ((u8 *) buf)[k]);
printf("\n");
}
if (type == 1 /* 1n data */ ) {
printf("isp116x: %s: in data: ", __FUNCTION__);
for (k = 0; k < PTD_GET_COUNT(ptd); ++k)
printf("%02x ", ((u8 *) buf)[k]);
printf("\n");
}
if (PTD_GET_LAST(ptd))
DBG("--- last PTD ---");
#endif
}
#else
#define dump_msg(dev, pipe, buffer, len, str) do { } while (0)
#define dump_pkt(dev, pipe, buffer, len, setup, str, small) do {} while (0)
#define dump_ptd(ptd) do {} while (0)
#define dump_ptd_data(ptd, buf, type) do {} while (0)
#endif
/* --- Virtual Root Hub ---------------------------------------------------- */
/* Device descriptor */
static __u8 root_hub_dev_des[] = {
0x12, /* __u8 bLength; */
0x01, /* __u8 bDescriptorType; Device */
0x10, /* __u16 bcdUSB; v1.1 */
0x01,
0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
0x00, /* __u8 bDeviceSubClass; */
0x00, /* __u8 bDeviceProtocol; */
0x08, /* __u8 bMaxPacketSize0; 8 Bytes */
0x00, /* __u16 idVendor; */
0x00,
0x00, /* __u16 idProduct; */
0x00,
0x00, /* __u16 bcdDevice; */
0x00,
0x00, /* __u8 iManufacturer; */
0x01, /* __u8 iProduct; */
0x00, /* __u8 iSerialNumber; */
0x01 /* __u8 bNumConfigurations; */
};
/* Configuration descriptor */
static __u8 root_hub_config_des[] = {
0x09, /* __u8 bLength; */
0x02, /* __u8 bDescriptorType; Configuration */
0x19, /* __u16 wTotalLength; */
0x00,
0x01, /* __u8 bNumInterfaces; */
0x01, /* __u8 bConfigurationValue; */
0x00, /* __u8 iConfiguration; */
0x40, /* __u8 bmAttributes;
Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
0x00, /* __u8 MaxPower; */
/* interface */
0x09, /* __u8 if_bLength; */
0x04, /* __u8 if_bDescriptorType; Interface */
0x00, /* __u8 if_bInterfaceNumber; */
0x00, /* __u8 if_bAlternateSetting; */
0x01, /* __u8 if_bNumEndpoints; */
0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
0x00, /* __u8 if_bInterfaceSubClass; */
0x00, /* __u8 if_bInterfaceProtocol; */
0x00, /* __u8 if_iInterface; */
/* endpoint */
0x07, /* __u8 ep_bLength; */
0x05, /* __u8 ep_bDescriptorType; Endpoint */
0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
0x03, /* __u8 ep_bmAttributes; Interrupt */
0x00, /* __u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
0x02,
0xff /* __u8 ep_bInterval; 255 ms */
};
static unsigned char root_hub_str_index0[] = {
0x04, /* __u8 bLength; */
0x03, /* __u8 bDescriptorType; String-descriptor */
0x09, /* __u8 lang ID */
0x04, /* __u8 lang ID */
};
static unsigned char root_hub_str_index1[] = {
0x22, /* __u8 bLength; */
0x03, /* __u8 bDescriptorType; String-descriptor */
'I', /* __u8 Unicode */
0, /* __u8 Unicode */
'S', /* __u8 Unicode */
0, /* __u8 Unicode */
'P', /* __u8 Unicode */
0, /* __u8 Unicode */
'1', /* __u8 Unicode */
0, /* __u8 Unicode */
'1', /* __u8 Unicode */
0, /* __u8 Unicode */
'6', /* __u8 Unicode */
0, /* __u8 Unicode */
'x', /* __u8 Unicode */
0, /* __u8 Unicode */
' ', /* __u8 Unicode */
0, /* __u8 Unicode */
'R', /* __u8 Unicode */
0, /* __u8 Unicode */
'o', /* __u8 Unicode */
0, /* __u8 Unicode */
'o', /* __u8 Unicode */
0, /* __u8 Unicode */
't', /* __u8 Unicode */
0, /* __u8 Unicode */
' ', /* __u8 Unicode */
0, /* __u8 Unicode */
'H', /* __u8 Unicode */
0, /* __u8 Unicode */
'u', /* __u8 Unicode */
0, /* __u8 Unicode */
'b', /* __u8 Unicode */
0, /* __u8 Unicode */
};
/*
* Hub class-specific descriptor is constructed dynamically
*/
/* --- Virtual root hub management functions ------------------------------- */
static int rh_check_port_status(struct isp116x *isp116x)
{
u32 temp, ndp, i;
int res;
res = -1;
temp = isp116x_read_reg32(isp116x, HCRHSTATUS);
ndp = (temp & RH_A_NDP);
for (i = 0; i < ndp; i++) {
temp = isp116x_read_reg32(isp116x, HCRHPORT1 + i);
/* check for a device disconnect */
if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
(RH_PS_PESC | RH_PS_CSC)) && ((temp & RH_PS_CCS) == 0)) {
res = i;
break;
}
}
return res;
}
/* --- HC management functions --------------------------------------------- */
/* Write len bytes to fifo, pad till 32-bit boundary
*/
static void write_ptddata_to_fifo(struct isp116x *isp116x, void *buf, int len)
{
u8 *dp = (u8 *) buf;
u16 *dp2 = (u16 *) buf;
u16 w;
int quot = len % 4;
if ((unsigned long)dp2 & 1) {
/* not aligned */
for (; len > 1; len -= 2) {
w = *dp++;
w |= *dp++ << 8;
isp116x_raw_write_data16(isp116x, w);
}
if (len)
isp116x_write_data16(isp116x, (u16) * dp);
} else {
/* aligned */
for (; len > 1; len -= 2)
isp116x_raw_write_data16(isp116x, *dp2++);
if (len)
isp116x_write_data16(isp116x, 0xff & *((u8 *) dp2));
}
if (quot == 1 || quot == 2)
isp116x_raw_write_data16(isp116x, 0);
}
/* Read len bytes from fifo and then read till 32-bit boundary
*/
static void read_ptddata_from_fifo(struct isp116x *isp116x, void *buf, int len)
{
u8 *dp = (u8 *) buf;
u16 *dp2 = (u16 *) buf;
u16 w;
int quot = len % 4;
if ((unsigned long)dp2 & 1) {
/* not aligned */
for (; len > 1; len -= 2) {
w = isp116x_raw_read_data16(isp116x);
*dp++ = w & 0xff;
*dp++ = (w >> 8) & 0xff;
}
if (len)
*dp = 0xff & isp116x_read_data16(isp116x);
} else {
/* aligned */
for (; len > 1; len -= 2)
*dp2++ = isp116x_raw_read_data16(isp116x);
if (len)
*(u8 *) dp2 = 0xff & isp116x_read_data16(isp116x);
}
if (quot == 1 || quot == 2)
isp116x_raw_read_data16(isp116x);
}
/* Write PTD's and data for scheduled transfers into the fifo ram.
* Fifo must be empty and ready */
static void pack_fifo(struct isp116x *isp116x, struct usb_device *dev,
unsigned long pipe, struct ptd *ptd, int n, void *data,
int len)
{
int buflen = n * sizeof(struct ptd) + len;
int i, done;
DBG("--- pack buffer %p - %d bytes (fifo %d) ---", data, len, buflen);
isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
isp116x_write_addr(isp116x, HCATLPORT | ISP116x_WRITE_OFFSET);
done = 0;
for (i = 0; i < n; i++) {
DBG("i=%d - done=%d - len=%d", i, done, PTD_GET_LEN(&ptd[i]));
dump_ptd(&ptd[i]);
isp116x_write_data16(isp116x, ptd[i].count);
isp116x_write_data16(isp116x, ptd[i].mps);
isp116x_write_data16(isp116x, ptd[i].len);
isp116x_write_data16(isp116x, ptd[i].faddr);
dump_ptd_data(&ptd[i], (__u8 *) data + done, 0);
write_ptddata_to_fifo(isp116x,
(__u8 *) data + done,
PTD_GET_LEN(&ptd[i]));
done += PTD_GET_LEN(&ptd[i]);
}
}
/* Read the processed PTD's and data from fifo ram back to URBs' buffers.
* Fifo must be full and done */
static int unpack_fifo(struct isp116x *isp116x, struct usb_device *dev,
unsigned long pipe, struct ptd *ptd, int n, void *data,
int len)
{
int buflen = n * sizeof(struct ptd) + len;
int i, done, cc, ret;
isp116x_write_reg16(isp116x, HCuPINT, HCuPINT_AIIEOT);
isp116x_write_reg16(isp116x, HCXFERCTR, buflen);
isp116x_write_addr(isp116x, HCATLPORT);
ret = TD_CC_NOERROR;
done = 0;
for (i = 0; i < n; i++) {
DBG("i=%d - done=%d - len=%d", i, done, PTD_GET_LEN(&ptd[i]));
ptd[i].count = isp116x_read_data16(isp116x);
ptd[i].mps = isp116x_read_data16(isp116x);
ptd[i].len = isp116x_read_data16(isp116x);
ptd[i].faddr = isp116x_read_data16(isp116x);
dump_ptd(&ptd[i]);
read_ptddata_from_fifo(isp116x,
(__u8 *) data + done,
PTD_GET_LEN(&ptd[i]));
dump_ptd_data(&ptd[i], (__u8 *) data + done, 1);
done += PTD_GET_LEN(&ptd[i]);
cc = PTD_GET_CC(&ptd[i]);
/* Data underrun means basically that we had more buffer space than
* the function had data. It is perfectly normal but upper levels have
* to know how much we actually transferred.
*/
if (cc == TD_NOTACCESSED ||
(cc != TD_CC_NOERROR && (ret == TD_CC_NOERROR || ret == TD_DATAUNDERRUN)))
ret = cc;
}
DBG("--- unpack buffer %p - %d bytes (fifo %d) ---", data, len, buflen);
return ret;
}
/* Interrupt handling
*/
static int isp116x_interrupt(struct isp116x *isp116x)
{
u16 irqstat;
u32 intstat;
int ret = 0;
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
irqstat = isp116x_read_reg16(isp116x, HCuPINT);
isp116x_write_reg16(isp116x, HCuPINT, irqstat);
DBG(">>>>>> irqstat %x <<<<<<", irqstat);
if (irqstat & HCuPINT_ATL) {
DBG(">>>>>> HCuPINT_ATL <<<<<<");
udelay(500);
ret = 1;
}
if (irqstat & HCuPINT_OPR) {
intstat = isp116x_read_reg32(isp116x, HCINTSTAT);
isp116x_write_reg32(isp116x, HCINTSTAT, intstat);
DBG(">>>>>> HCuPINT_OPR %x <<<<<<", intstat);
if (intstat & HCINT_UE) {
ERR("unrecoverable error, controller disabled");
/* FIXME: be optimistic, hope that bug won't repeat
* often. Make some non-interrupt context restart the
* controller. Count and limit the retries though;
* either hardware or software errors can go forever...
*/
isp116x_reset(isp116x);
ret = -1;
return -1;
}
if (intstat & HCINT_RHSC) {
got_rhsc = 1;
ret = 1;
/* When root hub or any of its ports is going
to come out of suspend, it may take more
than 10ms for status bits to stabilize. */
wait_ms(20);
}
if (intstat & HCINT_SO) {
ERR("schedule overrun");
ret = -1;
}
irqstat &= ~HCuPINT_OPR;
}
return ret;
}
/* With one PTD we can transfer almost 1K in one go;
* HC does the splitting into endpoint digestible transactions
*/
struct ptd ptd[1];
static inline int max_transfer_len(struct usb_device *dev, unsigned long pipe)
{
unsigned mpck = usb_maxpacket(dev, pipe);
/* One PTD can transfer 1023 bytes but try to always
* transfer multiples of endpoint buffer size
*/
return 1023 / mpck * mpck;
}
/* Do an USB transfer
*/
static int isp116x_submit_job(struct usb_device *dev, unsigned long pipe,
int dir, void *buffer, int len)
{
struct isp116x *isp116x = &isp116x_dev;
int type = usb_pipetype(pipe);
int epnum = usb_pipeendpoint(pipe);
int max = usb_maxpacket(dev, pipe);
int dir_out = usb_pipeout(pipe);
int speed_low = usb_pipeslow(pipe);
int i, done = 0, stat, timeout, cc;
/* 500 frames or 0.5s timeout when function is busy and NAKs transactions for a while */
int retries = 500;
DBG("------------------------------------------------");
dump_msg(dev, pipe, buffer, len, "SUBMIT");
DBG("------------------------------------------------");
if (len >= 1024) {
ERR("Too big job");
dev->status = USB_ST_CRC_ERR;
return -1;
}
if (isp116x->disabled) {
ERR("EPIPE");
dev->status = USB_ST_CRC_ERR;
return -1;
}
/* device pulled? Shortcut the action. */
if (devgone == dev) {
ERR("ENODEV");
dev->status = USB_ST_CRC_ERR;
return USB_ST_CRC_ERR;
}
if (!max) {
ERR("pipesize for pipe %lx is zero", pipe);
dev->status = USB_ST_CRC_ERR;
return -1;
}
if (type == PIPE_ISOCHRONOUS) {
ERR("isochronous transfers not supported");
dev->status = USB_ST_CRC_ERR;
return -1;
}
/* FIFO not empty? */
if (isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_FULL) {
ERR("****** FIFO not empty! ******");
dev->status = USB_ST_BUF_ERR;
return -1;
}
retry:
isp116x_write_reg32(isp116x, HCINTSTAT, 0xff);
/* Prepare the PTD data */
ptd->count = PTD_CC_MSK | PTD_ACTIVE_MSK |
PTD_TOGGLE(usb_gettoggle(dev, epnum, dir_out));
ptd->mps = PTD_MPS(max) | PTD_SPD(speed_low) | PTD_EP(epnum) | PTD_LAST_MSK;
ptd->len = PTD_LEN(len) | PTD_DIR(dir);
ptd->faddr = PTD_FA(usb_pipedevice(pipe));
retry_same:
/* Pack data into FIFO ram */
pack_fifo(isp116x, dev, pipe, ptd, 1, buffer, len);
#ifdef EXTRA_DELAY
wait_ms(EXTRA_DELAY);
#endif
/* Start the data transfer */
/* Allow more time for a BULK device to react - some are slow */
if (usb_pipebulk(pipe))
timeout = 5000;
else
timeout = 100;
/* Wait for it to complete */
for (;;) {
/* Check whether the controller is done */
stat = isp116x_interrupt(isp116x);
if (stat < 0) {
dev->status = USB_ST_CRC_ERR;
break;
}
if (stat > 0)
break;
/* Check the timeout */
if (--timeout)
udelay(1);
else {
ERR("CTL:TIMEOUT ");
stat = USB_ST_CRC_ERR;
break;
}
}
/* We got an Root Hub Status Change interrupt */
if (got_rhsc) {
isp116x_show_regs(isp116x);
got_rhsc = 0;
/* Abuse timeout */
timeout = rh_check_port_status(isp116x);
if (timeout >= 0) {
/*
* FIXME! NOTE! AAAARGH!
* This is potentially dangerous because it assumes
* that only one device is ever plugged in!
*/
devgone = dev;
}
}
/* Ok, now we can read transfer status */
/* FIFO not ready? */
if (!(isp116x_read_reg16(isp116x, HCBUFSTAT) & HCBUFSTAT_ATL_DONE)) {
ERR("****** FIFO not ready! ******");
dev->status = USB_ST_BUF_ERR;
return -1;
}
/* Unpack data from FIFO ram */
cc = unpack_fifo(isp116x, dev, pipe, ptd, 1, buffer, len);
i = PTD_GET_COUNT(ptd);
done += i;
buffer += i;
len -= i;
/* There was some kind of real problem; Prepare the PTD again
* and retry from the failed transaction on
*/
if (cc && cc != TD_NOTACCESSED && cc != TD_DATAUNDERRUN) {
if (retries >= 100) {
retries -= 100;
/* The chip will have toggled the toggle bit for the failed
* transaction too. We have to toggle it back.
*/
usb_settoggle(dev, epnum, dir_out, !PTD_GET_TOGGLE(ptd));
goto retry;
}
}
/* "Normal" errors; TD_NOTACCESSED would mean in effect that the function have NAKed
* the transactions from the first on for the whole frame. It may be busy and we retry
* with the same PTD. PTD_ACTIVE (and not TD_NOTACCESSED) would mean that some of the
* PTD didn't make it because the function was busy or the frame ended before the PTD
* finished. We prepare the rest of the data and try again.
*/
else if (cc == TD_NOTACCESSED || PTD_GET_ACTIVE(ptd) || (cc != TD_DATAUNDERRUN && PTD_GET_COUNT(ptd) < PTD_GET_LEN(ptd))) {
if (retries) {
--retries;
if (cc == TD_NOTACCESSED && PTD_GET_ACTIVE(ptd) && !PTD_GET_COUNT(ptd)) goto retry_same;
usb_settoggle(dev, epnum, dir_out, PTD_GET_TOGGLE(ptd));
goto retry;
}
}
if (cc != TD_CC_NOERROR && cc != TD_DATAUNDERRUN) {
DBG("****** completition code error %x ******", cc);
switch (cc) {
case TD_CC_BITSTUFFING:
dev->status = USB_ST_BIT_ERR;
break;
case TD_CC_STALL:
dev->status = USB_ST_STALLED;
break;
case TD_BUFFEROVERRUN:
case TD_BUFFERUNDERRUN:
dev->status = USB_ST_BUF_ERR;
break;
default:
dev->status = USB_ST_CRC_ERR;
}
return -cc;
}
else usb_settoggle(dev, epnum, dir_out, PTD_GET_TOGGLE(ptd));
dump_msg(dev, pipe, buffer, len, "SUBMIT(ret)");
dev->status = 0;
return done;
}
/* Adapted from au1x00_usb_ohci.c
*/
static int isp116x_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len,
struct devrequest *cmd)
{
struct isp116x *isp116x = &isp116x_dev;
u32 tmp = 0;
int leni = transfer_len;
int len = 0;
int stat = 0;
u32 datab[4];
u8 *data_buf = (u8 *) datab;
u16 bmRType_bReq;
u16 wValue;
u16 wIndex;
u16 wLength;
if (usb_pipeint(pipe)) {
INFO("Root-Hub submit IRQ: NOT implemented");
return 0;
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
wValue = swap_16(cmd->value);
wIndex = swap_16(cmd->index);
wLength = swap_16(cmd->length);
DBG("--- HUB ----------------------------------------");
DBG("submit rh urb, req=%x val=%#x index=%#x len=%d",
bmRType_bReq, wValue, wIndex, wLength);
dump_msg(dev, pipe, buffer, transfer_len, "RH");
DBG("------------------------------------------------");
switch (bmRType_bReq) {
case RH_GET_STATUS:
DBG("RH_GET_STATUS");
*(__u16 *) data_buf = swap_16(1);
len = 2;
break;
case RH_GET_STATUS | RH_INTERFACE:
DBG("RH_GET_STATUS | RH_INTERFACE");
*(__u16 *) data_buf = swap_16(0);
len = 2;
break;
case RH_GET_STATUS | RH_ENDPOINT:
DBG("RH_GET_STATUS | RH_ENDPOINT");
*(__u16 *) data_buf = swap_16(0);
len = 2;
break;
case RH_GET_STATUS | RH_CLASS:
DBG("RH_GET_STATUS | RH_CLASS");
tmp = isp116x_read_reg32(isp116x, HCRHSTATUS);
*(__u32 *) data_buf = swap_32(tmp & ~(RH_HS_CRWE | RH_HS_DRWE));
len = 4;
break;
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
DBG("RH_GET_STATUS | RH_OTHER | RH_CLASS");
tmp = isp116x_read_reg32(isp116x, HCRHPORT1 + wIndex - 1);
*(__u32 *) data_buf = swap_32(tmp);
isp116x_show_regs(isp116x);
len = 4;
break;
case RH_CLEAR_FEATURE | RH_ENDPOINT:
DBG("RH_CLEAR_FEATURE | RH_ENDPOINT");
switch (wValue) {
case RH_ENDPOINT_STALL:
DBG("C_HUB_ENDPOINT_STALL");
len = 0;
break;
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
DBG("RH_CLEAR_FEATURE | RH_CLASS");
switch (wValue) {
case RH_C_HUB_LOCAL_POWER:
DBG("C_HUB_LOCAL_POWER");
len = 0;
break;
case RH_C_HUB_OVER_CURRENT:
DBG("C_HUB_OVER_CURRENT");
isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
len = 0;
break;
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
DBG("RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS");
switch (wValue) {
case RH_PORT_ENABLE:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_CCS);
len = 0;
break;
case RH_PORT_SUSPEND:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_POCI);
len = 0;
break;
case RH_PORT_POWER:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_LSDA);
len = 0;
break;
case RH_C_PORT_CONNECTION:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_CSC);
len = 0;
break;
case RH_C_PORT_ENABLE:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PESC);
len = 0;
break;
case RH_C_PORT_SUSPEND:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PSSC);
len = 0;
break;
case RH_C_PORT_OVER_CURRENT:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_POCI);
len = 0;
break;
case RH_C_PORT_RESET:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PRSC);
len = 0;
break;
default:
ERR("invalid wValue");
stat = USB_ST_STALLED;
}
isp116x_show_regs(isp116x);
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
DBG("RH_SET_FEATURE | RH_OTHER | RH_CLASS");
switch (wValue) {
case RH_PORT_SUSPEND:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PSS);
len = 0;
break;
case RH_PORT_RESET:
/* Spin until any current reset finishes */
while (1) {
tmp =
isp116x_read_reg32(isp116x,
HCRHPORT1 + wIndex - 1);
if (!(tmp & RH_PS_PRS))
break;
wait_ms(1);
}
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PRS);
wait_ms(10);
len = 0;
break;
case RH_PORT_POWER:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PPS);
len = 0;
break;
case RH_PORT_ENABLE:
isp116x_write_reg32(isp116x, HCRHPORT1 + wIndex - 1,
RH_PS_PES);
len = 0;
break;
default:
ERR("invalid wValue");
stat = USB_ST_STALLED;
}
isp116x_show_regs(isp116x);
break;
case RH_SET_ADDRESS:
DBG("RH_SET_ADDRESS");
rh_devnum = wValue;
len = 0;
break;
case RH_GET_DESCRIPTOR:
DBG("RH_GET_DESCRIPTOR: %x, %d", wValue, wLength);
switch (wValue) {
case (USB_DT_DEVICE << 8): /* device descriptor */
len = min_t(unsigned int,
leni, min_t(unsigned int,
sizeof(root_hub_dev_des),
wLength));
data_buf = root_hub_dev_des;
break;
case (USB_DT_CONFIG << 8): /* configuration descriptor */
len = min_t(unsigned int,
leni, min_t(unsigned int,
sizeof(root_hub_config_des),
wLength));
data_buf = root_hub_config_des;
break;
case ((USB_DT_STRING << 8) | 0x00): /* string 0 descriptors */
len = min_t(unsigned int,
leni, min_t(unsigned int,
sizeof(root_hub_str_index0),
wLength));
data_buf = root_hub_str_index0;
break;
case ((USB_DT_STRING << 8) | 0x01): /* string 1 descriptors */
len = min_t(unsigned int,
leni, min_t(unsigned int,
sizeof(root_hub_str_index1),
wLength));
data_buf = root_hub_str_index1;
break;
default:
ERR("invalid wValue");
stat = USB_ST_STALLED;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
DBG("RH_GET_DESCRIPTOR | RH_CLASS");
tmp = isp116x_read_reg32(isp116x, HCRHDESCA);
data_buf[0] = 0x09; /* min length; */
data_buf[1] = 0x29;
data_buf[2] = tmp & RH_A_NDP;
data_buf[3] = 0;
if (tmp & RH_A_PSM) /* per-port power switching? */
data_buf[3] |= 0x01;
if (tmp & RH_A_NOCP) /* no overcurrent reporting? */
data_buf[3] |= 0x10;
else if (tmp & RH_A_OCPM) /* per-port overcurrent rep? */
data_buf[3] |= 0x08;
/* Corresponds to data_buf[4-7] */
datab[1] = 0;
data_buf[5] = (tmp & RH_A_POTPGT) >> 24;
tmp = isp116x_read_reg32(isp116x, HCRHDESCB);
data_buf[7] = tmp & RH_B_DR;
if (data_buf[2] < 7)
data_buf[8] = 0xff;
else {
data_buf[0] += 2;
data_buf[8] = (tmp & RH_B_DR) >> 8;
data_buf[10] = data_buf[9] = 0xff;
}
len = min_t(unsigned int, leni,
min_t(unsigned int, data_buf[0], wLength));
break;
case RH_GET_CONFIGURATION:
DBG("RH_GET_CONFIGURATION");
*(__u8 *) data_buf = 0x01;
len = 1;
break;
case RH_SET_CONFIGURATION:
DBG("RH_SET_CONFIGURATION");
isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPSC);
len = 0;
break;
default:
ERR("*** *** *** unsupported root hub command *** *** ***");
stat = USB_ST_STALLED;
}
len = min_t(int, len, leni);
if (buffer != data_buf)
memcpy(buffer, data_buf, len);
dev->act_len = len;
dev->status = stat;
DBG("dev act_len %d, status %d", dev->act_len, dev->status);
dump_msg(dev, pipe, buffer, transfer_len, "RH(ret)");
return stat;
}
/* --- Transfer functions -------------------------------------------------- */
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, int interval)
{
DBG("dev=%p pipe=%#lx buf=%p size=%d int=%d",
dev, pipe, buffer, len, interval);
return -1;
}
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len, struct devrequest *setup)
{
int devnum = usb_pipedevice(pipe);
int epnum = usb_pipeendpoint(pipe);
int max = max_transfer_len(dev, pipe);
int dir_in = usb_pipein(pipe);
int done, ret;
/* Control message is for the HUB? */
if (devnum == rh_devnum)
return isp116x_submit_rh_msg(dev, pipe, buffer, len, setup);
/* Ok, no HUB message so send the message to the device */
/* Setup phase */
DBG("--- SETUP PHASE --------------------------------");
usb_settoggle(dev, epnum, 1, 0);
ret = isp116x_submit_job(dev, pipe,
PTD_DIR_SETUP,
setup, sizeof(struct devrequest));
if (ret < 0) {
DBG("control setup phase error (ret = %d", ret);
return -1;
}
/* Data phase */
DBG("--- DATA PHASE ---------------------------------");
done = 0;
usb_settoggle(dev, epnum, !dir_in, 1);
while (done < len) {
ret = isp116x_submit_job(dev, pipe,
dir_in ? PTD_DIR_IN : PTD_DIR_OUT,
(__u8 *) buffer + done,
max > len - done ? len - done : max);
if (ret < 0) {
DBG("control data phase error (ret = %d)", ret);
return -1;
}
done += ret;
if (dir_in && ret < max) /* short packet */
break;
}
/* Status phase */
DBG("--- STATUS PHASE -------------------------------");
usb_settoggle(dev, epnum, !dir_in, 1);
ret = isp116x_submit_job(dev, pipe,
!dir_in ? PTD_DIR_IN : PTD_DIR_OUT, NULL, 0);
if (ret < 0) {
DBG("control status phase error (ret = %d", ret);
return -1;
}
dev->act_len = done;
dump_msg(dev, pipe, buffer, len, "DEV(ret)");
return done;
}
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int len)
{
int dir_out = usb_pipeout(pipe);
int max = max_transfer_len(dev, pipe);
int done, ret;
DBG("--- BULK ---------------------------------------");
DBG("dev=%ld pipe=%ld buf=%p size=%d dir_out=%d",
usb_pipedevice(pipe), usb_pipeendpoint(pipe), buffer, len, dir_out);
done = 0;
while (done < len) {
ret = isp116x_submit_job(dev, pipe,
!dir_out ? PTD_DIR_IN : PTD_DIR_OUT,
(__u8 *) buffer + done,
max > len - done ? len - done : max);
if (ret < 0) {
DBG("error on bulk message (ret = %d)", ret);
return -1;
}
done += ret;
if (!dir_out && ret < max) /* short packet */
break;
}
dev->act_len = done;
return 0;
}
/* --- Basic functions ----------------------------------------------------- */
static int isp116x_sw_reset(struct isp116x *isp116x)
{
int retries = 15;
int ret = 0;
DBG("");
isp116x->disabled = 1;
isp116x_write_reg16(isp116x, HCSWRES, HCSWRES_MAGIC);
isp116x_write_reg32(isp116x, HCCMDSTAT, HCCMDSTAT_HCR);
while (--retries) {
/* It usually resets within 1 ms */
wait_ms(1);
if (!(isp116x_read_reg32(isp116x, HCCMDSTAT) & HCCMDSTAT_HCR))
break;
}
if (!retries) {
ERR("software reset timeout");
ret = -1;
}
return ret;
}
static int isp116x_reset(struct isp116x *isp116x)
{
unsigned long t;
u16 clkrdy = 0;
int ret, timeout = 15 /* ms */ ;
DBG("");
ret = isp116x_sw_reset(isp116x);
if (ret)
return ret;
for (t = 0; t < timeout; t++) {
clkrdy = isp116x_read_reg16(isp116x, HCuPINT) & HCuPINT_CLKRDY;
if (clkrdy)
break;
wait_ms(1);
}
if (!clkrdy) {
ERR("clock not ready after %dms", timeout);
/* After sw_reset the clock won't report to be ready, if
H_WAKEUP pin is high. */
ERR("please make sure that the H_WAKEUP pin is pulled low!");
ret = -1;
}
return ret;
}
static void isp116x_stop(struct isp116x *isp116x)
{
u32 val;
DBG("");
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
/* Switch off ports' power, some devices don't come up
after next 'start' without this */
val = isp116x_read_reg32(isp116x, HCRHDESCA);
val &= ~(RH_A_NPS | RH_A_PSM);
isp116x_write_reg32(isp116x, HCRHDESCA, val);
isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_LPS);
isp116x_sw_reset(isp116x);
}
/*
* Configure the chip. The chip must be successfully reset by now.
*/
static int isp116x_start(struct isp116x *isp116x)
{
struct isp116x_platform_data *board = isp116x->board;
u32 val;
DBG("");
/* Clear interrupt status and disable all interrupt sources */
isp116x_write_reg16(isp116x, HCuPINT, 0xff);
isp116x_write_reg16(isp116x, HCuPINTENB, 0);
isp116x_write_reg16(isp116x, HCITLBUFLEN, ISP116x_ITL_BUFSIZE);
isp116x_write_reg16(isp116x, HCATLBUFLEN, ISP116x_ATL_BUFSIZE);
/* Hardware configuration */
val = HCHWCFG_DBWIDTH(1);
if (board->sel15Kres)
val |= HCHWCFG_15KRSEL;
/* Remote wakeup won't work without working clock */
if (board->remote_wakeup_enable)
val |= HCHWCFG_CLKNOTSTOP;
if (board->oc_enable)
val |= HCHWCFG_ANALOG_OC;
isp116x_write_reg16(isp116x, HCHWCFG, val);
/* --- Root hub configuration */
val = (25 << 24) & RH_A_POTPGT;
/* AN10003_1.pdf recommends RH_A_NPS (no power switching) to
be always set. Yet, instead, we request individual port
power switching. */
val |= RH_A_PSM;
/* Report overcurrent per port */
val |= RH_A_OCPM;
isp116x_write_reg32(isp116x, HCRHDESCA, val);
isp116x->rhdesca = isp116x_read_reg32(isp116x, HCRHDESCA);
val = RH_B_PPCM;
isp116x_write_reg32(isp116x, HCRHDESCB, val);
isp116x->rhdescb = isp116x_read_reg32(isp116x, HCRHDESCB);
val = 0;
if (board->remote_wakeup_enable)
val |= RH_HS_DRWE;
isp116x_write_reg32(isp116x, HCRHSTATUS, val);
isp116x->rhstatus = isp116x_read_reg32(isp116x, HCRHSTATUS);
isp116x_write_reg32(isp116x, HCFMINTVL, 0x27782edf);
/* Go operational */
val = HCCONTROL_USB_OPER;
if (board->remote_wakeup_enable)
val |= HCCONTROL_RWE;
isp116x_write_reg32(isp116x, HCCONTROL, val);
/* Disable ports to avoid race in device enumeration */
isp116x_write_reg32(isp116x, HCRHPORT1, RH_PS_CCS);
isp116x_write_reg32(isp116x, HCRHPORT2, RH_PS_CCS);
isp116x_show_regs(isp116x);
isp116x->disabled = 0;
return 0;
}
/* --- Init functions ------------------------------------------------------ */
int isp116x_check_id(struct isp116x *isp116x)
{
int val;
val = isp116x_read_reg16(isp116x, HCCHIPID);
if ((val & HCCHIPID_MASK) != HCCHIPID_MAGIC) {
ERR("invalid chip ID %04x", val);
return -1;
}
return 0;
}
int usb_lowlevel_init(void)
{
struct isp116x *isp116x = &isp116x_dev;
DBG("");
got_rhsc = rh_devnum = 0;
/* Init device registers addr */
isp116x->addr_reg = (u16 *) ISP116X_HCD_ADDR;
isp116x->data_reg = (u16 *) ISP116X_HCD_DATA;
/* Setup specific board settings */
#ifdef ISP116X_HCD_SEL15kRES
isp116x_board.sel15Kres = 1;
#endif
#ifdef ISP116X_HCD_OC_ENABLE
isp116x_board.oc_enable = 1;
#endif
#ifdef ISP116X_HCD_REMOTE_WAKEUP_ENABLE
isp116x_board.remote_wakeup_enable = 1;
#endif
isp116x->board = &isp116x_board;
/* Try to get ISP116x silicon chip ID */
if (isp116x_check_id(isp116x) < 0)
return -1;
isp116x->disabled = 1;
isp116x->sleeping = 0;
isp116x_reset(isp116x);
isp116x_start(isp116x);
return 0;
}
int usb_lowlevel_stop(void)
{
struct isp116x *isp116x = &isp116x_dev;
DBG("");
if (!isp116x->disabled)
isp116x_stop(isp116x);
return 0;
}