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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 5809d764a9c6860abd3b160fb674fb767df09748 / . / drivers / usb / host / ohci-hcd.c
blob: 9acef5ee4f84813fc5037d94ec20b0a1ac77835d [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* URB OHCI HCD (Host Controller Driver) for USB on the AT91RM9200 and PCI bus.
*
* Interrupt support is added. Now, it has been tested
* on ULI1575 chip and works well with USB keyboard.
*
* (C) Copyright 2007
* Zhang Wei, Freescale Semiconductor, Inc. <wei.zhang@freescale.com>
*
* (C) Copyright 2003
* Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
*
* Note: Much of this code has been derived from Linux 2.4
* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
* (C) Copyright 2000-2002 David Brownell
*
* Modified for the MP2USB by (C) Copyright 2005 Eric Benard
* ebenard@eukrea.com - based on s3c24x0's driver
*/
/*
* IMPORTANT NOTES
* 1 - Read doc/README.generic_usb_ohci
* 2 - this driver is intended for use with USB Mass Storage Devices
* (BBB) and USB keyboard. There is NO support for Isochronous pipes!
* 2 - when running on a PQFP208 AT91RM9200, define CONFIG_AT91C_PQFP_UHPBUG
* to activate workaround for bug #41 or this driver will NOT work!
*/
#include <common.h>
#include <cpu_func.h>
#include <asm/byteorder.h>
#include <dm.h>
#include <errno.h>
#include <asm/cache.h>
#include <linux/delay.h>
#include <malloc.h>
#include <memalign.h>
#include <usb.h>
#include "ohci.h"
#ifdef CONFIG_AT91RM9200
#include <asm/arch/hardware.h> /* needed for AT91_USB_HOST_BASE */
#endif
#if defined(CONFIG_CPU_ARM920T) || \
defined(CONFIG_PCI) || \
defined(CONFIG_SYS_OHCI_USE_NPS)
# define OHCI_USE_NPS /* force NoPowerSwitching mode */
#endif
#undef OHCI_VERBOSE_DEBUG /* not always helpful */
#undef DEBUG
#undef SHOW_INFO
#undef OHCI_FILL_TRACE
/* For initializing controller (mask in an HCFS mode too) */
#define OHCI_CONTROL_INIT \
(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
#ifdef DEBUG
#define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif /* DEBUG */
#define err(format, arg...) printf("ERROR: " format "\n", ## arg)
#ifdef SHOW_INFO
#define info(format, arg...) printf("INFO: " format "\n", ## arg)
#else
#define info(format, arg...) do {} while (0)
#endif
#ifdef CONFIG_SYS_OHCI_BE_CONTROLLER
# define m16_swap(x) cpu_to_be16(x)
# define m32_swap(x) cpu_to_be32(x)
#else
# define m16_swap(x) cpu_to_le16(x)
# define m32_swap(x) cpu_to_le32(x)
#endif /* CONFIG_SYS_OHCI_BE_CONTROLLER */
/* We really should do proper cache flushing everywhere */
#define flush_dcache_buffer(addr, size) \
flush_dcache_range((unsigned long)(addr), \
ALIGN((unsigned long)(addr) + size, ARCH_DMA_MINALIGN))
#define invalidate_dcache_buffer(addr, size) \
invalidate_dcache_range((unsigned long)(addr), \
ALIGN((unsigned long)(addr) + size, ARCH_DMA_MINALIGN))
/* Do not use sizeof(ed / td) as our ed / td structs contain extra members */
#define flush_dcache_ed(addr) flush_dcache_buffer(addr, 16)
#define flush_dcache_td(addr) flush_dcache_buffer(addr, 16)
#define flush_dcache_iso_td(addr) flush_dcache_buffer(addr, 32)
#define flush_dcache_hcca(addr) flush_dcache_buffer(addr, 256)
#define invalidate_dcache_ed(addr) invalidate_dcache_buffer(addr, 16)
#define invalidate_dcache_td(addr) invalidate_dcache_buffer(addr, 16)
#define invalidate_dcache_iso_td(addr) invalidate_dcache_buffer(addr, 32)
#define invalidate_dcache_hcca(addr) invalidate_dcache_buffer(addr, 256)
#if CONFIG_IS_ENABLED(DM_USB)
/*
* The various ohci_mdelay(1) calls in the code seem unnecessary. We keep
* them around when building for older boards not yet converted to the dm
* just in case (to avoid regressions), for dm this turns them into nops.
*/
#define ohci_mdelay(x)
#else
#define ohci_mdelay(x) mdelay(x)
#endif
#if !CONFIG_IS_ENABLED(DM_USB)
/* global ohci_t */
static ohci_t gohci;
/* this must be aligned to a 256 byte boundary */
struct ohci_hcca ghcca[1];
#endif
/* mapping of the OHCI CC status to error codes */
static int cc_to_error[16] = {
/* No Error */ 0,
/* CRC Error */ USB_ST_CRC_ERR,
/* Bit Stuff */ USB_ST_BIT_ERR,
/* Data Togg */ USB_ST_CRC_ERR,
/* Stall */ USB_ST_STALLED,
/* DevNotResp */ -1,
/* PIDCheck */ USB_ST_BIT_ERR,
/* UnExpPID */ USB_ST_BIT_ERR,
/* DataOver */ USB_ST_BUF_ERR,
/* DataUnder */ USB_ST_BUF_ERR,
/* reservd */ -1,
/* reservd */ -1,
/* BufferOver */ USB_ST_BUF_ERR,
/* BuffUnder */ USB_ST_BUF_ERR,
/* Not Access */ -1,
/* Not Access */ -1
};
static const char *cc_to_string[16] = {
"No Error",
"CRC: Last data packet from endpoint contained a CRC error.",
"BITSTUFFING: Last data packet from endpoint contained a bit " \
"stuffing violation",
"DATATOGGLEMISMATCH: Last packet from endpoint had data toggle PID\n" \
"that did not match the expected value.",
"STALL: TD was moved to the Done Queue because the endpoint returned" \
" a STALL PID",
"DEVICENOTRESPONDING: Device did not respond to token (IN) or did\n" \
"not provide a handshake (OUT)",
"PIDCHECKFAILURE: Check bits on PID from endpoint failed on data PID\n"\
"(IN) or handshake (OUT)",
"UNEXPECTEDPID: Receive PID was not valid when encountered or PID\n" \
"value is not defined.",
"DATAOVERRUN: The amount of data returned by the endpoint exceeded\n" \
"either the size of the maximum data packet allowed\n" \
"from the endpoint (found in MaximumPacketSize field\n" \
"of ED) or the remaining buffer size.",
"DATAUNDERRUN: The endpoint returned less than MaximumPacketSize\n" \
"and that amount was not sufficient to fill the\n" \
"specified buffer",
"reserved1",
"reserved2",
"BUFFEROVERRUN: During an IN, HC received data from endpoint faster\n" \
"than it could be written to system memory",
"BUFFERUNDERRUN: During an OUT, HC could not retrieve data from\n" \
"system memory fast enough to keep up with data USB " \
"data rate.",
"NOT ACCESSED: This code is set by software before the TD is placed" \
"on a list to be processed by the HC.(1)",
"NOT ACCESSED: This code is set by software before the TD is placed" \
"on a list to be processed by the HC.(2)",
};
static inline u32 roothub_a(struct ohci *hc)
{ return ohci_readl(&hc->regs->roothub.a); }
static inline u32 roothub_b(struct ohci *hc)
{ return ohci_readl(&hc->regs->roothub.b); }
static inline u32 roothub_status(struct ohci *hc)
{ return ohci_readl(&hc->regs->roothub.status); }
static inline u32 roothub_portstatus(struct ohci *hc, int i)
{ return ohci_readl(&hc->regs->roothub.portstatus[i]); }
/* forward declaration */
static int hc_interrupt(ohci_t *ohci);
static void td_submit_job(ohci_t *ohci, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *setup, urb_priv_t *urb,
int interval);
static int ep_link(ohci_t * ohci, ed_t * ed);
static int ep_unlink(ohci_t * ohci, ed_t * ed);
static ed_t *ep_add_ed(ohci_dev_t *ohci_dev, struct usb_device *usb_dev,
unsigned long pipe, int interval, int load);
/*-------------------------------------------------------------------------*/
/* TDs ... */
static struct td *td_alloc(ohci_dev_t *ohci_dev, struct usb_device *usb_dev)
{
int i;
struct td *td;
td = NULL;
for (i = 0; i < NUM_TD; i++)
{
if (ohci_dev->tds[i].usb_dev == NULL)
{
td = &ohci_dev->tds[i];
td->usb_dev = usb_dev;
break;
}
}
return td;
}
static inline void ed_free(struct ed *ed)
{
ed->usb_dev = NULL;
}
/*-------------------------------------------------------------------------*
* URB support functions
*-------------------------------------------------------------------------*/
/* free HCD-private data associated with this URB */
static void urb_free_priv(urb_priv_t *urb)
{
int i;
int last;
struct td *td;
last = urb->length - 1;
if (last >= 0) {
for (i = 0; i <= last; i++) {
td = urb->td[i];
if (td) {
td->usb_dev = NULL;
urb->td[i] = NULL;
}
}
}
free(urb);
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
static int sohci_get_current_frame_number(ohci_t *ohci);
/* debug| print the main components of an URB
* small: 0) header + data packets 1) just header */
static void pkt_print(ohci_t *ohci, urb_priv_t *purb, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *setup, char *str, int small)
{
dbg("%s URB:[%4x] dev:%2lu,ep:%2lu-%c,type:%s,len:%d/%d stat:%#lx",
str,
sohci_get_current_frame_number(ohci),
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"),
(purb ? purb->actual_length : 0),
transfer_len, dev->status);
#ifdef OHCI_VERBOSE_DEBUG
if (!small) {
int i, len;
if (usb_pipecontrol(pipe)) {
printf(__FILE__ ": cmd(8):");
for (i = 0; i < 8 ; i++)
printf(" %02x", ((__u8 *) setup) [i]);
printf("\n");
}
if (transfer_len > 0 && buffer) {
printf(__FILE__ ": data(%d/%d):",
(purb ? purb->actual_length : 0),
transfer_len);
len = usb_pipeout(pipe)? transfer_len:
(purb ? purb->actual_length : 0);
for (i = 0; i < 16 && i < len; i++)
printf(" %02x", ((__u8 *) buffer) [i]);
printf("%s\n", i < len? "...": "");
}
}
#endif
}
/* just for debugging; prints non-empty branches of the int ed tree
* inclusive iso eds */
void ep_print_int_eds(ohci_t *ohci, char *str)
{
int i, j;
__u32 *ed_p;
for (i = 0; i < 32; i++) {
j = 5;
ed_p = &(ohci->hcca->int_table [i]);
if (*ed_p == 0)
continue;
invalidate_dcache_ed(ed_p);
printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
while (*ed_p != 0 && j--) {
ed_t *ed = (ed_t *)m32_swap(ed_p);
invalidate_dcache_ed(ed);
printf(" ed: %4x;", ed->hwINFO);
ed_p = &ed->hwNextED;
}
printf("\n");
}
}
static void ohci_dump_intr_mask(char *label, __u32 mask)
{
dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
label,
mask,
(mask & OHCI_INTR_MIE) ? " MIE" : "",
(mask & OHCI_INTR_OC) ? " OC" : "",
(mask & OHCI_INTR_RHSC) ? " RHSC" : "",
(mask & OHCI_INTR_FNO) ? " FNO" : "",
(mask & OHCI_INTR_UE) ? " UE" : "",
(mask & OHCI_INTR_RD) ? " RD" : "",
(mask & OHCI_INTR_SF) ? " SF" : "",
(mask & OHCI_INTR_WDH) ? " WDH" : "",
(mask & OHCI_INTR_SO) ? " SO" : ""
);
}
static void maybe_print_eds(char *label, __u32 value)
{
ed_t *edp = (ed_t *)value;
if (value) {
dbg("%s %08x", label, value);
invalidate_dcache_ed(edp);
dbg("%08x", edp->hwINFO);
dbg("%08x", edp->hwTailP);
dbg("%08x", edp->hwHeadP);
dbg("%08x", edp->hwNextED);
}
}
static char *hcfs2string(int state)
{
switch (state) {
case OHCI_USB_RESET: return "reset";
case OHCI_USB_RESUME: return "resume";
case OHCI_USB_OPER: return "operational";
case OHCI_USB_SUSPEND: return "suspend";
}
return "?";
}
/* dump control and status registers */
static void ohci_dump_status(ohci_t *controller)
{
struct ohci_regs *regs = controller->regs;
__u32 temp;
temp = ohci_readl(&regs->revision) & 0xff;
if (temp != 0x10)
dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
temp = ohci_readl(&regs->control);
dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
(temp & OHCI_CTRL_RWE) ? " RWE" : "",
(temp & OHCI_CTRL_RWC) ? " RWC" : "",
(temp & OHCI_CTRL_IR) ? " IR" : "",
hcfs2string(temp & OHCI_CTRL_HCFS),
(temp & OHCI_CTRL_BLE) ? " BLE" : "",
(temp & OHCI_CTRL_CLE) ? " CLE" : "",
(temp & OHCI_CTRL_IE) ? " IE" : "",
(temp & OHCI_CTRL_PLE) ? " PLE" : "",
temp & OHCI_CTRL_CBSR
);
temp = ohci_readl(&regs->cmdstatus);
dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
(temp & OHCI_SOC) >> 16,
(temp & OHCI_OCR) ? " OCR" : "",
(temp & OHCI_BLF) ? " BLF" : "",
(temp & OHCI_CLF) ? " CLF" : "",
(temp & OHCI_HCR) ? " HCR" : ""
);
ohci_dump_intr_mask("intrstatus", ohci_readl(&regs->intrstatus));
ohci_dump_intr_mask("intrenable", ohci_readl(&regs->intrenable));
maybe_print_eds("ed_periodcurrent",
ohci_readl(&regs->ed_periodcurrent));
maybe_print_eds("ed_controlhead", ohci_readl(&regs->ed_controlhead));
maybe_print_eds("ed_controlcurrent",
ohci_readl(&regs->ed_controlcurrent));
maybe_print_eds("ed_bulkhead", ohci_readl(&regs->ed_bulkhead));
maybe_print_eds("ed_bulkcurrent", ohci_readl(&regs->ed_bulkcurrent));
maybe_print_eds("donehead", ohci_readl(&regs->donehead));
}
static void ohci_dump_roothub(ohci_t *controller, int verbose)
{
__u32 temp, ndp, i;
temp = roothub_a(controller);
ndp = (temp & RH_A_NDP);
#ifdef CONFIG_AT91C_PQFP_UHPBUG
ndp = (ndp == 2) ? 1:0;
#endif
if (verbose) {
dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
((temp & RH_A_POTPGT) >> 24) & 0xff,
(temp & RH_A_NOCP) ? " NOCP" : "",
(temp & RH_A_OCPM) ? " OCPM" : "",
(temp & RH_A_DT) ? " DT" : "",
(temp & RH_A_NPS) ? " NPS" : "",
(temp & RH_A_PSM) ? " PSM" : "",
ndp
);
temp = roothub_b(controller);
dbg("roothub.b: %08x PPCM=%04x DR=%04x",
temp,
(temp & RH_B_PPCM) >> 16,
(temp & RH_B_DR)
);
temp = roothub_status(controller);
dbg("roothub.status: %08x%s%s%s%s%s%s",
temp,
(temp & RH_HS_CRWE) ? " CRWE" : "",
(temp & RH_HS_OCIC) ? " OCIC" : "",
(temp & RH_HS_LPSC) ? " LPSC" : "",
(temp & RH_HS_DRWE) ? " DRWE" : "",
(temp & RH_HS_OCI) ? " OCI" : "",
(temp & RH_HS_LPS) ? " LPS" : ""
);
}
for (i = 0; i < ndp; i++) {
temp = roothub_portstatus(controller, i);
dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
i,
temp,
(temp & RH_PS_PRSC) ? " PRSC" : "",
(temp & RH_PS_OCIC) ? " OCIC" : "",
(temp & RH_PS_PSSC) ? " PSSC" : "",
(temp & RH_PS_PESC) ? " PESC" : "",
(temp & RH_PS_CSC) ? " CSC" : "",
(temp & RH_PS_LSDA) ? " LSDA" : "",
(temp & RH_PS_PPS) ? " PPS" : "",
(temp & RH_PS_PRS) ? " PRS" : "",
(temp & RH_PS_POCI) ? " POCI" : "",
(temp & RH_PS_PSS) ? " PSS" : "",
(temp & RH_PS_PES) ? " PES" : "",
(temp & RH_PS_CCS) ? " CCS" : ""
);
}
}
static void ohci_dump(ohci_t *controller, int verbose)
{
dbg("OHCI controller usb-%s state", controller->slot_name);
/* dumps some of the state we know about */
ohci_dump_status(controller);
if (verbose)
ep_print_int_eds(controller, "hcca");
invalidate_dcache_hcca(controller->hcca);
dbg("hcca frame #%04x", controller->hcca->frame_no);
ohci_dump_roothub(controller, 1);
}
#endif /* DEBUG */
/*-------------------------------------------------------------------------*
* Interface functions (URB)
*-------------------------------------------------------------------------*/
/* get a transfer request */
int sohci_submit_job(ohci_t *ohci, ohci_dev_t *ohci_dev, urb_priv_t *urb,
struct devrequest *setup)
{
ed_t *ed;
urb_priv_t *purb_priv = urb;
int i, size = 0;
struct usb_device *dev = urb->dev;
unsigned long pipe = urb->pipe;
void *buffer = urb->transfer_buffer;
int transfer_len = urb->transfer_buffer_length;
int interval = urb->interval;
/* when controller's hung, permit only roothub cleanup attempts
* such as powering down ports */
if (ohci->disabled) {
err("sohci_submit_job: EPIPE");
return -1;
}
/* we're about to begin a new transaction here so mark the
* URB unfinished */
urb->finished = 0;
/* every endpoint has a ed, locate and fill it */
ed = ep_add_ed(ohci_dev, dev, pipe, interval, 1);
if (!ed) {
err("sohci_submit_job: ENOMEM");
return -1;
}
/* for the private part of the URB we need the number of TDs (size) */
switch (usb_pipetype(pipe)) {
case PIPE_BULK: /* one TD for every 4096 Byte */
size = (transfer_len - 1) / 4096 + 1;
break;
case PIPE_CONTROL:/* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
size = (transfer_len == 0)? 2:
(transfer_len - 1) / 4096 + 3;
break;
case PIPE_INTERRUPT: /* 1 TD */
size = 1;
break;
}
ed->purb = urb;
if (size >= (N_URB_TD - 1)) {
err("need %d TDs, only have %d", size, N_URB_TD);
return -1;
}
purb_priv->pipe = pipe;
/* fill the private part of the URB */
purb_priv->length = size;
purb_priv->ed = ed;
purb_priv->actual_length = 0;
/* allocate the TDs */
/* note that td[0] was allocated in ep_add_ed */
for (i = 0; i < size; i++) {
purb_priv->td[i] = td_alloc(ohci_dev, dev);
if (!purb_priv->td[i]) {
purb_priv->length = i;
urb_free_priv(purb_priv);
err("sohci_submit_job: ENOMEM");
return -1;
}
}
if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
urb_free_priv(purb_priv);
err("sohci_submit_job: EINVAL");
return -1;
}
/* link the ed into a chain if is not already */
if (ed->state != ED_OPER)
ep_link(ohci, ed);
/* fill the TDs and link it to the ed */
td_submit_job(ohci, dev, pipe, buffer, transfer_len,
setup, purb_priv, interval);
return 0;
}
/*-------------------------------------------------------------------------*/
#ifdef DEBUG
/* tell us the current USB frame number */
static int sohci_get_current_frame_number(ohci_t *ohci)
{
invalidate_dcache_hcca(ohci->hcca);
return m16_swap(ohci->hcca->frame_no);
}
#endif
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* search for the right branch to insert an interrupt ed into the int tree
* do some load ballancing;
* returns the branch and
* sets the interval to interval = 2^integer (ld (interval)) */
static int ep_int_ballance(ohci_t *ohci, int interval, int load)
{
int i, branch = 0;
/* search for the least loaded interrupt endpoint
* branch of all 32 branches
*/
for (i = 0; i < 32; i++)
if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i])
branch = i;
branch = branch % interval;
for (i = branch; i < 32; i += interval)
ohci->ohci_int_load [i] += load;
return branch;
}
/*-------------------------------------------------------------------------*/
/* 2^int( ld (inter)) */
static int ep_2_n_interval(int inter)
{
int i;
for (i = 0; ((inter >> i) > 1) && (i < 5); i++);
return 1 << i;
}
/*-------------------------------------------------------------------------*/
/* the int tree is a binary tree
* in order to process it sequentially the indexes of the branches have to
* be mapped the mapping reverses the bits of a word of num_bits length */
static int ep_rev(int num_bits, int word)
{
int i, wout = 0;
for (i = 0; i < num_bits; i++)
wout |= (((word >> i) & 1) << (num_bits - i - 1));
return wout;
}
/*-------------------------------------------------------------------------*
* ED handling functions
*-------------------------------------------------------------------------*/
/* link an ed into one of the HC chains */
static int ep_link(ohci_t *ohci, ed_t *edi)
{
volatile ed_t *ed = edi;
int int_branch;
int i;
int inter;
int interval;
int load;
__u32 *ed_p;
ed->state = ED_OPER;
ed->int_interval = 0;
switch (ed->type) {
case PIPE_CONTROL:
ed->hwNextED = 0;
flush_dcache_ed(ed);
if (ohci->ed_controltail == NULL)
ohci_writel((uintptr_t)ed, &ohci->regs->ed_controlhead);
else
ohci->ed_controltail->hwNextED =
m32_swap((unsigned long)ed);
ed->ed_prev = ohci->ed_controltail;
if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_CLE;
ohci_writel(ohci->hc_control, &ohci->regs->control);
}
ohci->ed_controltail = edi;
break;
case PIPE_BULK:
ed->hwNextED = 0;
flush_dcache_ed(ed);
if (ohci->ed_bulktail == NULL)
ohci_writel((uintptr_t)ed, &ohci->regs->ed_bulkhead);
else
ohci->ed_bulktail->hwNextED =
m32_swap((unsigned long)ed);
ed->ed_prev = ohci->ed_bulktail;
if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
!ohci->ed_rm_list[1] && !ohci->sleeping) {
ohci->hc_control |= OHCI_CTRL_BLE;
ohci_writel(ohci->hc_control, &ohci->regs->control);
}
ohci->ed_bulktail = edi;
break;
case PIPE_INTERRUPT:
load = ed->int_load;
interval = ep_2_n_interval(ed->int_period);
ed->int_interval = interval;
int_branch = ep_int_ballance(ohci, interval, load);
ed->int_branch = int_branch;
for (i = 0; i < ep_rev(6, interval); i += inter) {
inter = 1;
for (ed_p = &(ohci->hcca->int_table[\
ep_rev(5, i) + int_branch]);
(*ed_p != 0) &&
(((ed_t *)ed_p)->int_interval >= interval);
ed_p = &(((ed_t *)ed_p)->hwNextED))
inter = ep_rev(6,
((ed_t *)ed_p)->int_interval);
ed->hwNextED = *ed_p;
flush_dcache_ed(ed);
*ed_p = m32_swap((unsigned long)ed);
flush_dcache_hcca(ohci->hcca);
}
break;
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* scan the periodic table to find and unlink this ED */
static void periodic_unlink(struct ohci *ohci, volatile struct ed *ed,
unsigned index, unsigned period)
{
__maybe_unused unsigned long aligned_ed_p;
for (; index < NUM_INTS; index += period) {
__u32 *ed_p = &ohci->hcca->int_table [index];
/* ED might have been unlinked through another path */
while (*ed_p != 0) {
if (((struct ed *)(uintptr_t)
m32_swap((unsigned long)ed_p)) == ed) {
*ed_p = ed->hwNextED;
aligned_ed_p = (unsigned long)ed_p;
aligned_ed_p &= ~(ARCH_DMA_MINALIGN - 1);
flush_dcache_range(aligned_ed_p,
aligned_ed_p + ARCH_DMA_MINALIGN);
break;
}
ed_p = &(((struct ed *)(uintptr_t)
m32_swap((unsigned long)ed_p))->hwNextED);
}
}
}
/* unlink an ed from one of the HC chains.
* just the link to the ed is unlinked.
* the link from the ed still points to another operational ed or 0
* so the HC can eventually finish the processing of the unlinked ed */
static int ep_unlink(ohci_t *ohci, ed_t *edi)
{
volatile ed_t *ed = edi;
int i;
ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
flush_dcache_ed(ed);
switch (ed->type) {
case PIPE_CONTROL:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_CLE;
ohci_writel(ohci->hc_control,
&ohci->regs->control);
}
ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
&ohci->regs->ed_controlhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
flush_dcache_ed(ed->ed_prev);
}
if (ohci->ed_controltail == ed) {
ohci->ed_controltail = ed->ed_prev;
} else {
((ed_t *)(uintptr_t)m32_swap(
*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case PIPE_BULK:
if (ed->ed_prev == NULL) {
if (!ed->hwNextED) {
ohci->hc_control &= ~OHCI_CTRL_BLE;
ohci_writel(ohci->hc_control,
&ohci->regs->control);
}
ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
&ohci->regs->ed_bulkhead);
} else {
ed->ed_prev->hwNextED = ed->hwNextED;
flush_dcache_ed(ed->ed_prev);
}
if (ohci->ed_bulktail == ed) {
ohci->ed_bulktail = ed->ed_prev;
} else {
((ed_t *)(uintptr_t)m32_swap(
*((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
}
break;
case PIPE_INTERRUPT:
periodic_unlink(ohci, ed, 0, 1);
for (i = ed->int_branch; i < 32; i += ed->int_interval)
ohci->ohci_int_load[i] -= ed->int_load;
break;
}
ed->state = ED_UNLINK;
return 0;
}
/*-------------------------------------------------------------------------*/
/* add/reinit an endpoint; this should be done once at the
* usb_set_configuration command, but the USB stack is a little bit
* stateless so we do it at every transaction if the state of the ed
* is ED_NEW then a dummy td is added and the state is changed to
* ED_UNLINK in all other cases the state is left unchanged the ed
* info fields are setted anyway even though most of them should not
* change
*/
static ed_t *ep_add_ed(ohci_dev_t *ohci_dev, struct usb_device *usb_dev,
unsigned long pipe, int interval, int load)
{
td_t *td;
ed_t *ed_ret;
volatile ed_t *ed;
ed = ed_ret = &ohci_dev->ed[(usb_pipeendpoint(pipe) << 1) |
(usb_pipecontrol(pipe)? 0: usb_pipeout(pipe))];
if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
err("ep_add_ed: pending delete");
/* pending delete request */
return NULL;
}
if (ed->state == ED_NEW) {
/* dummy td; end of td list for ed */
td = td_alloc(ohci_dev, usb_dev);
ed->hwTailP = m32_swap((unsigned long)td);
ed->hwHeadP = ed->hwTailP;
ed->state = ED_UNLINK;
ed->type = usb_pipetype(pipe);
ohci_dev->ed_cnt++;
}
ed->hwINFO = m32_swap(usb_pipedevice(pipe)
| usb_pipeendpoint(pipe) << 7
| (usb_pipeisoc(pipe)? 0x8000: 0)
| (usb_pipecontrol(pipe)? 0: \
(usb_pipeout(pipe)? 0x800: 0x1000))
| (usb_dev->speed == USB_SPEED_LOW) << 13
| usb_maxpacket(usb_dev, pipe) << 16);
if (ed->type == PIPE_INTERRUPT && ed->state == ED_UNLINK) {
ed->int_period = interval;
ed->int_load = load;
}
flush_dcache_ed(ed);
return ed_ret;
}
/*-------------------------------------------------------------------------*
* TD handling functions
*-------------------------------------------------------------------------*/
/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
static void td_fill(ohci_t *ohci, unsigned int info,
void *data, int len,
struct usb_device *dev, int index, urb_priv_t *urb_priv)
{
volatile td_t *td, *td_pt;
#ifdef OHCI_FILL_TRACE
int i;
#endif
if (index > urb_priv->length) {
err("index > length");
return;
}
/* use this td as the next dummy */
td_pt = urb_priv->td [index];
td_pt->hwNextTD = 0;
flush_dcache_td(td_pt);
/* fill the old dummy TD */
td = urb_priv->td [index] =
(td_t *)(uintptr_t)
(m32_swap(urb_priv->ed->hwTailP) & ~0xf);
td->ed = urb_priv->ed;
td->next_dl_td = NULL;
td->index = index;
td->data = (uintptr_t)data;
#ifdef OHCI_FILL_TRACE
if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
for (i = 0; i < len; i++)
printf("td->data[%d] %#2x ", i, ((unsigned char *)td->data)[i]);
printf("\n");
}
#endif
if (!len)
data = 0;
td->hwINFO = m32_swap(info);
td->hwCBP = m32_swap((unsigned long)data);
if (data)
td->hwBE = m32_swap((unsigned long)(data + len - 1));
else
td->hwBE = 0;
td->hwNextTD = m32_swap((unsigned long)td_pt);
flush_dcache_td(td);
/* append to queue */
td->ed->hwTailP = td->hwNextTD;
flush_dcache_ed(td->ed);
}
/*-------------------------------------------------------------------------*/
/* prepare all TDs of a transfer */
static void td_submit_job(ohci_t *ohci, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *setup, urb_priv_t *urb,
int interval)
{
int data_len = transfer_len;
void *data;
int cnt = 0;
__u32 info = 0;
unsigned int toggle = 0;
flush_dcache_buffer(buffer, data_len);
/* OHCI handles the DATA-toggles itself, we just use the USB-toggle
* bits for resetting */
if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
toggle = TD_T_TOGGLE;
} else {
toggle = TD_T_DATA0;
usb_settoggle(dev, usb_pipeendpoint(pipe),
usb_pipeout(pipe), 1);
}
urb->td_cnt = 0;
if (data_len)
data = buffer;
else
data = 0;
switch (usb_pipetype(pipe)) {
case PIPE_BULK:
info = usb_pipeout(pipe)?
TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN ;
while (data_len > 4096) {
td_fill(ohci, info | (cnt? TD_T_TOGGLE:toggle),
data, 4096, dev, cnt, urb);
data += 4096; data_len -= 4096; cnt++;
}
info = usb_pipeout(pipe)?
TD_CC | TD_DP_OUT : TD_CC | TD_R | TD_DP_IN ;
td_fill(ohci, info | (cnt? TD_T_TOGGLE:toggle), data,
data_len, dev, cnt, urb);
cnt++;
if (!ohci->sleeping) {
/* start bulk list */
ohci_writel(OHCI_BLF, &ohci->regs->cmdstatus);
}
break;
case PIPE_CONTROL:
/* Setup phase */
info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
flush_dcache_buffer(setup, 8);
td_fill(ohci, info, setup, 8, dev, cnt++, urb);
/* Optional Data phase */
if (data_len > 0) {
info = usb_pipeout(pipe)?
TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
/* NOTE: mishandles transfers >8K, some >4K */
td_fill(ohci, info, data, data_len, dev, cnt++, urb);
}
/* Status phase */
info = (usb_pipeout(pipe) || data_len == 0) ?
TD_CC | TD_DP_IN | TD_T_DATA1:
TD_CC | TD_DP_OUT | TD_T_DATA1;
td_fill(ohci, info, data, 0, dev, cnt++, urb);
if (!ohci->sleeping) {
/* start Control list */
ohci_writel(OHCI_CLF, &ohci->regs->cmdstatus);
}
break;
case PIPE_INTERRUPT:
info = usb_pipeout(urb->pipe)?
TD_CC | TD_DP_OUT | toggle:
TD_CC | TD_R | TD_DP_IN | toggle;
td_fill(ohci, info, data, data_len, dev, cnt++, urb);
break;
}
if (urb->length != cnt)
dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
}
/*-------------------------------------------------------------------------*
* Done List handling functions
*-------------------------------------------------------------------------*/
/* calculate the transfer length and update the urb */
static void dl_transfer_length(td_t *td)
{
__u32 tdBE, tdCBP;
urb_priv_t *lurb_priv = td->ed->purb;
tdBE = m32_swap(td->hwBE);
tdCBP = m32_swap(td->hwCBP);
if (!(usb_pipecontrol(lurb_priv->pipe) &&
((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
if (tdBE != 0) {
if (td->hwCBP == 0)
lurb_priv->actual_length += tdBE - td->data + 1;
else
lurb_priv->actual_length += tdCBP - td->data;
}
}
}
/*-------------------------------------------------------------------------*/
static void check_status(td_t *td_list)
{
urb_priv_t *lurb_priv = td_list->ed->purb;
int urb_len = lurb_priv->length;
__u32 *phwHeadP = &td_list->ed->hwHeadP;
int cc;
cc = TD_CC_GET(m32_swap(td_list->hwINFO));
if (cc) {
err(" USB-error: %s (%x)", cc_to_string[cc], cc);
invalidate_dcache_ed(td_list->ed);
if (*phwHeadP & m32_swap(0x1)) {
if (lurb_priv &&
((td_list->index + 1) < urb_len)) {
*phwHeadP =
(lurb_priv->td[urb_len - 1]->hwNextTD &\
m32_swap(0xfffffff0)) |
(*phwHeadP & m32_swap(0x2));
lurb_priv->td_cnt += urb_len -
td_list->index - 1;
} else
*phwHeadP &= m32_swap(0xfffffff2);
flush_dcache_ed(td_list->ed);
}
}
}
/* replies to the request have to be on a FIFO basis so
* we reverse the reversed done-list */
static td_t *dl_reverse_done_list(ohci_t *ohci)
{
uintptr_t td_list_hc;
td_t *td_rev = NULL;
td_t *td_list = NULL;
invalidate_dcache_hcca(ohci->hcca);
td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
ohci->hcca->done_head = 0;
flush_dcache_hcca(ohci->hcca);
while (td_list_hc) {
td_list = (td_t *)td_list_hc;
invalidate_dcache_td(td_list);
check_status(td_list);
td_list->next_dl_td = td_rev;
td_rev = td_list;
td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
}
return td_list;
}
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
static void finish_urb(ohci_t *ohci, urb_priv_t *urb, int status)
{
if ((status & (ED_OPER | ED_UNLINK)) && (urb->state != URB_DEL))
urb->finished = 1;
else
dbg("finish_urb: strange.., ED state %x, \n", status);
}
/*
* Used to take back a TD from the host controller. This would normally be
* called from within dl_done_list, however it may be called directly if the
* HC no longer sees the TD and it has not appeared on the donelist (after
* two frames). This bug has been observed on ZF Micro systems.
*/
static int takeback_td(ohci_t *ohci, td_t *td_list)
{
ed_t *ed;
int cc;
int stat = 0;
/* urb_t *urb; */
urb_priv_t *lurb_priv;
__u32 tdINFO, edHeadP, edTailP;
invalidate_dcache_td(td_list);
tdINFO = m32_swap(td_list->hwINFO);
ed = td_list->ed;
lurb_priv = ed->purb;
dl_transfer_length(td_list);
lurb_priv->td_cnt++;
/* error code of transfer */
cc = TD_CC_GET(tdINFO);
if (cc) {
err("USB-error: %s (%x)", cc_to_string[cc], cc);
stat = cc_to_error[cc];
}
/* see if this done list makes for all TD's of current URB,
* and mark the URB finished if so */
if (lurb_priv->td_cnt == lurb_priv->length)
finish_urb(ohci, lurb_priv, ed->state);
dbg("dl_done_list: processing TD %x, len %x\n",
lurb_priv->td_cnt, lurb_priv->length);
if (ed->state != ED_NEW && (!usb_pipeint(lurb_priv->pipe))) {
invalidate_dcache_ed(ed);
edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
edTailP = m32_swap(ed->hwTailP);
/* unlink eds if they are not busy */
if ((edHeadP == edTailP) && (ed->state == ED_OPER))
ep_unlink(ohci, ed);
}
return stat;
}
static int dl_done_list(ohci_t *ohci)
{
int stat = 0;
td_t *td_list = dl_reverse_done_list(ohci);
while (td_list) {
td_t *td_next = td_list->next_dl_td;
stat = takeback_td(ohci, td_list);
td_list = td_next;
}
return stat;
}
/*-------------------------------------------------------------------------*
* Virtual Root Hub
*-------------------------------------------------------------------------*/
#include <usbroothubdes.h>
/* Hub class-specific descriptor is constructed dynamically */
/*-------------------------------------------------------------------------*/
#define OK(x) len = (x); break
#ifdef DEBUG
#define WR_RH_STAT(x) {info("WR:status %#8x", (x)); ohci_writel((x), \
&ohci->regs->roothub.status); }
#define WR_RH_PORTSTAT(x) {info("WR:portstatus[%d] %#8x", wIndex-1, \
(x)); ohci_writel((x), &ohci->regs->roothub.portstatus[wIndex-1]); }
#else
#define WR_RH_STAT(x) ohci_writel((x), &ohci->regs->roothub.status)
#define WR_RH_PORTSTAT(x) ohci_writel((x), \
&ohci->regs->roothub.portstatus[wIndex-1])
#endif
#define RD_RH_STAT roothub_status(ohci)
#define RD_RH_PORTSTAT roothub_portstatus(ohci, wIndex-1)
/* request to virtual root hub */
int rh_check_port_status(ohci_t *controller)
{
__u32 temp, ndp, i;
int res;
res = -1;
temp = roothub_a(controller);
ndp = (temp & RH_A_NDP);
#ifdef CONFIG_AT91C_PQFP_UHPBUG
ndp = (ndp == 2) ? 1:0;
#endif
for (i = 0; i < ndp; i++) {
temp = roothub_portstatus(controller, 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;
}
static int ohci_submit_rh_msg(ohci_t *ohci, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *cmd)
{
void *data = buffer;
int leni = transfer_len;
int len = 0;
int stat = 0;
__u16 bmRType_bReq;
__u16 wValue;
__u16 wIndex;
__u16 wLength;
ALLOC_ALIGN_BUFFER(__u8, databuf, 16, sizeof(u32));
#ifdef DEBUG
pkt_print(ohci, NULL, dev, pipe, buffer, transfer_len,
cmd, "SUB(rh)", usb_pipein(pipe));
#else
ohci_mdelay(1);
#endif
if (usb_pipeint(pipe)) {
info("Root-Hub submit IRQ: NOT implemented");
return 0;
}
bmRType_bReq = cmd->requesttype | (cmd->request << 8);
wValue = le16_to_cpu(cmd->value);
wIndex = le16_to_cpu(cmd->index);
wLength = le16_to_cpu(cmd->length);
info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
switch (bmRType_bReq) {
/* Request Destination:
without flags: Device,
RH_INTERFACE: interface,
RH_ENDPOINT: endpoint,
RH_CLASS means HUB here,
RH_OTHER | RH_CLASS almost ever means HUB_PORT here
*/
case RH_GET_STATUS:
*(u16 *)databuf = cpu_to_le16(1);
OK(2);
case RH_GET_STATUS | RH_INTERFACE:
*(u16 *)databuf = cpu_to_le16(0);
OK(2);
case RH_GET_STATUS | RH_ENDPOINT:
*(u16 *)databuf = cpu_to_le16(0);
OK(2);
case RH_GET_STATUS | RH_CLASS:
*(u32 *)databuf = cpu_to_le32(
RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
OK(4);
case RH_GET_STATUS | RH_OTHER | RH_CLASS:
*(u32 *)databuf = cpu_to_le32(RD_RH_PORTSTAT);
OK(4);
case RH_CLEAR_FEATURE | RH_ENDPOINT:
switch (wValue) {
case (RH_ENDPOINT_STALL):
OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_CLASS:
switch (wValue) {
case RH_C_HUB_LOCAL_POWER:
OK(0);
case (RH_C_HUB_OVER_CURRENT):
WR_RH_STAT(RH_HS_OCIC);
OK(0);
}
break;
case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_ENABLE): WR_RH_PORTSTAT(RH_PS_CCS); OK(0);
case (RH_PORT_SUSPEND): WR_RH_PORTSTAT(RH_PS_POCI); OK(0);
case (RH_PORT_POWER): WR_RH_PORTSTAT(RH_PS_LSDA); OK(0);
case (RH_C_PORT_CONNECTION): WR_RH_PORTSTAT(RH_PS_CSC); OK(0);
case (RH_C_PORT_ENABLE): WR_RH_PORTSTAT(RH_PS_PESC); OK(0);
case (RH_C_PORT_SUSPEND): WR_RH_PORTSTAT(RH_PS_PSSC); OK(0);
case (RH_C_PORT_OVER_CURRENT):WR_RH_PORTSTAT(RH_PS_OCIC); OK(0);
case (RH_C_PORT_RESET): WR_RH_PORTSTAT(RH_PS_PRSC); OK(0);
}
break;
case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
switch (wValue) {
case (RH_PORT_SUSPEND):
WR_RH_PORTSTAT(RH_PS_PSS); OK(0);
case (RH_PORT_RESET): /* BUG IN HUP CODE *********/
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT(RH_PS_PRS);
OK(0);
case (RH_PORT_POWER):
WR_RH_PORTSTAT(RH_PS_PPS);
OK(0);
case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
if (RD_RH_PORTSTAT & RH_PS_CCS)
WR_RH_PORTSTAT(RH_PS_PES);
OK(0);
}
break;
case RH_SET_ADDRESS:
ohci->rh.devnum = wValue;
OK(0);
case RH_GET_DESCRIPTOR:
switch ((wValue & 0xff00) >> 8) {
case (0x01): /* device descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_dev_des),
wLength));
databuf = root_hub_dev_des; OK(len);
case (0x02): /* configuration descriptor */
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_config_des),
wLength));
databuf = root_hub_config_des; OK(len);
case (0x03): /* string descriptors */
if (wValue == 0x0300) {
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_str_index0),
wLength));
databuf = root_hub_str_index0;
OK(len);
}
if (wValue == 0x0301) {
len = min_t(unsigned int,
leni,
min_t(unsigned int,
sizeof(root_hub_str_index1),
wLength));
databuf = root_hub_str_index1;
OK(len);
}
default:
stat = USB_ST_STALLED;
}
break;
case RH_GET_DESCRIPTOR | RH_CLASS:
{
__u32 temp = roothub_a(ohci);
databuf[0] = 9; /* min length; */
databuf[1] = 0x29;
databuf[2] = temp & RH_A_NDP;
#ifdef CONFIG_AT91C_PQFP_UHPBUG
databuf[2] = (databuf[2] == 2) ? 1 : 0;
#endif
databuf[3] = 0;
if (temp & RH_A_PSM) /* per-port power switching? */
databuf[3] |= 0x1;
if (temp & RH_A_NOCP) /* no overcurrent reporting? */
databuf[3] |= 0x10;
else if (temp & RH_A_OCPM)/* per-port overcurrent reporting? */
databuf[3] |= 0x8;
databuf[4] = 0;
databuf[5] = (temp & RH_A_POTPGT) >> 24;
databuf[6] = 0;
temp = roothub_b(ohci);
databuf[7] = temp & RH_B_DR;
if (databuf[2] < 7) {
databuf[8] = 0xff;
} else {
databuf[0] += 2;
databuf[8] = (temp & RH_B_DR) >> 8;
databuf[10] = databuf[9] = 0xff;
}
len = min_t(unsigned int, leni,
min_t(unsigned int, databuf[0], wLength));
OK(len);
}
case RH_GET_CONFIGURATION:
databuf[0] = 0x01;
OK(1);
case RH_SET_CONFIGURATION:
WR_RH_STAT(0x10000);
OK(0);
default:
dbg("unsupported root hub command");
stat = USB_ST_STALLED;
}
#ifdef DEBUG
ohci_dump_roothub(ohci, 1);
#else
ohci_mdelay(1);
#endif
len = min_t(int, len, leni);
if (data != databuf)
memcpy(data, databuf, len);
dev->act_len = len;
dev->status = stat;
#ifdef DEBUG
pkt_print(ohci, NULL, dev, pipe, buffer,
transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
#else
ohci_mdelay(1);
#endif
return stat;
}
/*-------------------------------------------------------------------------*/
static ohci_dev_t *ohci_get_ohci_dev(ohci_t *ohci, int devnum, int intr)
{
int i;
if (!intr)
return &ohci->ohci_dev;
/* First see if we already have an ohci_dev for this dev. */
for (i = 0; i < NUM_INT_DEVS; i++) {
if (ohci->int_dev[i].devnum == devnum)
return &ohci->int_dev[i];
}
/* If not then find a free one. */
for (i = 0; i < NUM_INT_DEVS; i++) {
if (ohci->int_dev[i].devnum == -1) {
ohci->int_dev[i].devnum = devnum;
return &ohci->int_dev[i];
}
}
printf("ohci: Error out of ohci_devs for interrupt endpoints\n");
return NULL;
}
/* common code for handling submit messages - used for all but root hub */
/* accesses. */
static urb_priv_t *ohci_alloc_urb(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len, int interval)
{
urb_priv_t *urb;
urb = calloc(1, sizeof(urb_priv_t));
if (!urb) {
printf("ohci: Error out of memory allocating urb\n");
return NULL;
}
urb->dev = dev;
urb->pipe = pipe;
urb->transfer_buffer = buffer;
urb->transfer_buffer_length = transfer_len;
urb->interval = interval;
return urb;
}
static int submit_common_msg(ohci_t *ohci, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *setup, int interval)
{
int stat = 0;
int maxsize = usb_maxpacket(dev, pipe);
int timeout;
urb_priv_t *urb;
ohci_dev_t *ohci_dev;
urb = ohci_alloc_urb(dev, pipe, buffer, transfer_len, interval);
if (!urb)
return -ENOMEM;
#ifdef DEBUG
urb->actual_length = 0;
pkt_print(ohci, urb, dev, pipe, buffer, transfer_len,
setup, "SUB", usb_pipein(pipe));
#else
ohci_mdelay(1);
#endif
if (!maxsize) {
err("submit_common_message: pipesize for pipe %lx is zero",
pipe);
return -1;
}
ohci_dev = ohci_get_ohci_dev(ohci, dev->devnum, usb_pipeint(pipe));
if (!ohci_dev)
return -ENOMEM;
if (sohci_submit_job(ohci, ohci_dev, urb, setup) < 0) {
err("sohci_submit_job failed");
return -1;
}
mdelay(10);
/* ohci_dump_status(ohci); */
timeout = USB_TIMEOUT_MS(pipe);
/* wait for it to complete */
for (;;) {
/* check whether the controller is done */
stat = hc_interrupt(ohci);
if (stat < 0) {
stat = USB_ST_CRC_ERR;
break;
}
/* NOTE: since we are not interrupt driven in U-Boot and always
* handle only one URB at a time, we cannot assume the
* transaction finished on the first successful return from
* hc_interrupt().. unless the flag for current URB is set,
* meaning that all TD's to/from device got actually
* transferred and processed. If the current URB is not
* finished we need to re-iterate this loop so as
* hc_interrupt() gets called again as there needs to be some
* more TD's to process still */
if ((stat >= 0) && (stat != 0xff) && (urb->finished)) {
/* 0xff is returned for an SF-interrupt */
break;
}
if (--timeout) {
mdelay(1);
if (!urb->finished)
dbg("*");
} else {
if (!usb_pipeint(pipe))
err("CTL:TIMEOUT ");
dbg("submit_common_msg: TO status %x\n", stat);
urb->finished = 1;
stat = USB_ST_CRC_ERR;
break;
}
}
dev->status = stat;
dev->act_len = urb->actual_length;
if (usb_pipein(pipe) && dev->status == 0 && dev->act_len)
invalidate_dcache_buffer(buffer, dev->act_len);
#ifdef DEBUG
pkt_print(ohci, urb, dev, pipe, buffer, transfer_len,
setup, "RET(ctlr)", usb_pipein(pipe));
#else
ohci_mdelay(1);
#endif
urb_free_priv(urb);
return 0;
}
#define MAX_INT_QUEUESIZE 8
struct int_queue {
int queuesize;
int curr_urb;
urb_priv_t *urb[MAX_INT_QUEUESIZE];
};
static struct int_queue *_ohci_create_int_queue(ohci_t *ohci,
struct usb_device *udev, unsigned long pipe, int queuesize,
int elementsize, void *buffer, int interval)
{
struct int_queue *queue;
ohci_dev_t *ohci_dev;
int i;
if (queuesize > MAX_INT_QUEUESIZE)
return NULL;
ohci_dev = ohci_get_ohci_dev(ohci, udev->devnum, 1);
if (!ohci_dev)
return NULL;
queue = malloc(sizeof(*queue));
if (!queue) {
printf("ohci: Error out of memory allocating int queue\n");
return NULL;
}
for (i = 0; i < queuesize; i++) {
queue->urb[i] = ohci_alloc_urb(udev, pipe,
buffer + i * elementsize,
elementsize, interval);
if (!queue->urb[i])
break;
if (sohci_submit_job(ohci, ohci_dev, queue->urb[i], NULL)) {
printf("ohci: Error submitting int queue job\n");
urb_free_priv(queue->urb[i]);
break;
}
}
if (i == 0) {
/* We did not succeed in submitting even 1 urb */
free(queue);
return NULL;
}
queue->queuesize = i;
queue->curr_urb = 0;
return queue;
}
static void *_ohci_poll_int_queue(ohci_t *ohci, struct usb_device *udev,
struct int_queue *queue)
{
if (queue->curr_urb == queue->queuesize)
return NULL; /* Queue depleted */
if (hc_interrupt(ohci) < 0)
return NULL;
if (queue->urb[queue->curr_urb]->finished) {
void *ret = queue->urb[queue->curr_urb]->transfer_buffer;
queue->curr_urb++;
return ret;
}
return NULL;
}
static int _ohci_destroy_int_queue(ohci_t *ohci, struct usb_device *dev,
struct int_queue *queue)
{
int i;
for (i = 0; i < queue->queuesize; i++)
urb_free_priv(queue->urb[i]);
free(queue);
return 0;
}
#if !CONFIG_IS_ENABLED(DM_USB)
/* submit routines called from usb.c */
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len)
{
info("submit_bulk_msg");
return submit_common_msg(&gohci, dev, pipe, buffer, transfer_len,
NULL, 0);
}
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
int transfer_len, int interval, bool nonblock)
{
info("submit_int_msg");
return submit_common_msg(&gohci, dev, pipe, buffer, transfer_len, NULL,
interval);
}
struct int_queue *create_int_queue(struct usb_device *dev,
unsigned long pipe, int queuesize, int elementsize,
void *buffer, int interval)
{
return _ohci_create_int_queue(&gohci, dev, pipe, queuesize,
elementsize, buffer, interval);
}
void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
{
return _ohci_poll_int_queue(&gohci, dev, queue);
}
int destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
{
return _ohci_destroy_int_queue(&gohci, dev, queue);
}
#endif
static int _ohci_submit_control_msg(ohci_t *ohci, struct usb_device *dev,
unsigned long pipe, void *buffer, int transfer_len,
struct devrequest *setup)
{
int maxsize = usb_maxpacket(dev, pipe);
info("submit_control_msg");
#ifdef DEBUG
pkt_print(ohci, NULL, dev, pipe, buffer, transfer_len,
setup, "SUB", usb_pipein(pipe));
#else
ohci_mdelay(1);
#endif
if (!maxsize) {
err("submit_control_message: pipesize for pipe %lx is zero",
pipe);
return -1;
}
if (((pipe >> 8) & 0x7f) == ohci->rh.devnum) {
ohci->rh.dev = dev;
/* root hub - redirect */
return ohci_submit_rh_msg(ohci, dev, pipe, buffer,
transfer_len, setup);
}
return submit_common_msg(ohci, dev, pipe, buffer, transfer_len,
setup, 0);
}
/*-------------------------------------------------------------------------*
* HC functions
*-------------------------------------------------------------------------*/
/* reset the HC and BUS */
static int hc_reset(ohci_t *ohci)
{
#ifdef CONFIG_PCI_EHCI_DEVNO
pci_dev_t pdev;
#endif
int timeout = 30;
int smm_timeout = 50; /* 0,5 sec */
dbg("%s\n", __FUNCTION__);
#ifdef CONFIG_PCI_EHCI_DEVNO
/*
* Some multi-function controllers (e.g. ISP1562) allow root hub
* resetting via EHCI registers only.
*/
pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVNO);
if (pdev != -1) {
u32 base;
int timeout = 1000;
pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
base += EHCI_USBCMD_OFF;
ohci_writel(ohci_readl(base) | EHCI_USBCMD_HCRESET, base);
while (ohci_readl(base) & EHCI_USBCMD_HCRESET) {
if (timeout-- <= 0) {
printf("USB RootHub reset timed out!");
break;
}
udelay(1);
}
} else
printf("No EHCI func at %d index!\n", CONFIG_PCI_EHCI_DEVNO);
#endif
if (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
/* SMM owns the HC, request ownership */
ohci_writel(OHCI_OCR, &ohci->regs->cmdstatus);
info("USB HC TakeOver from SMM");
while (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
mdelay(10);
if (--smm_timeout == 0) {
err("USB HC TakeOver failed!");
return -1;
}
}
}
/* Disable HC interrupts */
ohci_writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;\n",
ohci->slot_name,
ohci_readl(&ohci->regs->control));
/* Reset USB (needed by some controllers) */
ohci->hc_control = 0;
ohci_writel(ohci->hc_control, &ohci->regs->control);
/* HC Reset requires max 10 us delay */
ohci_writel(OHCI_HCR, &ohci->regs->cmdstatus);
while ((ohci_readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
if (--timeout == 0) {
err("USB HC reset timed out!");
return -1;
}
udelay(1);
}
return 0;
}
/*-------------------------------------------------------------------------*/
/* Start an OHCI controller, set the BUS operational
* enable interrupts
* connect the virtual root hub */
static int hc_start(ohci_t *ohci)
{
__u32 mask;
unsigned int fminterval;
int i;
ohci->disabled = 1;
for (i = 0; i < NUM_INT_DEVS; i++)
ohci->int_dev[i].devnum = -1;
/* Tell the controller where the control and bulk lists are
* The lists are empty now. */
ohci_writel(0, &ohci->regs->ed_controlhead);
ohci_writel(0, &ohci->regs->ed_bulkhead);
ohci_writel((uintptr_t)ohci->hcca,
&ohci->regs->hcca); /* reset clears this */
fminterval = 0x2edf;
ohci_writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
ohci_writel(fminterval, &ohci->regs->fminterval);
ohci_writel(0x628, &ohci->regs->lsthresh);
/* start controller operations */
ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
ohci->disabled = 0;
ohci_writel(ohci->hc_control, &ohci->regs->control);
/* disable all interrupts */
mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
OHCI_INTR_OC | OHCI_INTR_MIE);
ohci_writel(mask, &ohci->regs->intrdisable);
/* clear all interrupts */
mask &= ~OHCI_INTR_MIE;
ohci_writel(mask, &ohci->regs->intrstatus);
/* Choose the interrupts we care about now - but w/o MIE */
mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
ohci_writel(mask, &ohci->regs->intrenable);
#ifdef OHCI_USE_NPS
/* required for AMD-756 and some Mac platforms */
ohci_writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
&ohci->regs->roothub.a);
ohci_writel(RH_HS_LPSC, &ohci->regs->roothub.status);
#endif /* OHCI_USE_NPS */
/* connect the virtual root hub */
ohci->rh.devnum = 0;
return 0;
}
/*-------------------------------------------------------------------------*/
/* an interrupt happens */
static int hc_interrupt(ohci_t *ohci)
{
struct ohci_regs *regs = ohci->regs;
int ints;
int stat = -1;
invalidate_dcache_hcca(ohci->hcca);
if ((ohci->hcca->done_head != 0) &&
!(m32_swap(ohci->hcca->done_head) & 0x01)) {
ints = OHCI_INTR_WDH;
} else {
ints = ohci_readl(&regs->intrstatus);
if (ints == ~(u32)0) {
ohci->disabled++;
err("%s device removed!", ohci->slot_name);
return -1;
} else {
ints &= ohci_readl(&regs->intrenable);
if (ints == 0) {
dbg("hc_interrupt: returning..\n");
return 0xff;
}
}
}
/* dbg("Interrupt: %x frame: %x", ints,
le16_to_cpu(ohci->hcca->frame_no)); */
if (ints & OHCI_INTR_RHSC)
stat = 0xff;
if (ints & OHCI_INTR_UE) {
ohci->disabled++;
err("OHCI Unrecoverable Error, controller usb-%s disabled",
ohci->slot_name);
/* e.g. due to PCI Master/Target Abort */
#ifdef DEBUG
ohci_dump(ohci, 1);
#else
ohci_mdelay(1);
#endif
/* 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... */
hc_reset(ohci);
return -1;
}
if (ints & OHCI_INTR_WDH) {
ohci_mdelay(1);
ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
(void)ohci_readl(&regs->intrdisable); /* flush */
stat = dl_done_list(ohci);
ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
(void)ohci_readl(&regs->intrdisable); /* flush */
}
if (ints & OHCI_INTR_SO) {
dbg("USB Schedule overrun\n");
ohci_writel(OHCI_INTR_SO, &regs->intrenable);
stat = -1;
}
/* FIXME: this assumes SOF (1/ms) interrupts don't get lost... */
if (ints & OHCI_INTR_SF) {
unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
mdelay(1);
ohci_writel(OHCI_INTR_SF, &regs->intrdisable);
if (ohci->ed_rm_list[frame] != NULL)
ohci_writel(OHCI_INTR_SF, &regs->intrenable);
stat = 0xff;
}
ohci_writel(ints, &regs->intrstatus);
return stat;
}
/*-------------------------------------------------------------------------*/
#if !CONFIG_IS_ENABLED(DM_USB)
/*-------------------------------------------------------------------------*/
/* De-allocate all resources.. */
static void hc_release_ohci(ohci_t *ohci)
{
dbg("USB HC release ohci usb-%s", ohci->slot_name);
if (!ohci->disabled)
hc_reset(ohci);
}
/*-------------------------------------------------------------------------*/
/*
* low level initalisation routine, called from usb.c
*/
static char ohci_inited = 0;
int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
{
memset(&gohci, 0, sizeof(ohci_t));
/* align the storage */
if ((__u32)&ghcca[0] & 0xff) {
err("HCCA not aligned!!");
return -1;
}
gohci.hcca = &ghcca[0];
info("aligned ghcca %p", gohci.hcca);
memset(gohci.hcca, 0, sizeof(struct ohci_hcca));
gohci.disabled = 1;
gohci.sleeping = 0;
gohci.irq = -1;
gohci.regs = (struct ohci_regs *)CONFIG_SYS_USB_OHCI_REGS_BASE;
gohci.flags = 0;
gohci.slot_name = CONFIG_SYS_USB_OHCI_SLOT_NAME;
if (hc_reset (&gohci) < 0) {
hc_release_ohci (&gohci);
err ("can't reset usb-%s", gohci.slot_name);
return -1;
}
if (hc_start(&gohci) < 0) {
err("can't start usb-%s", gohci.slot_name);
hc_release_ohci(&gohci);
/* Initialization failed */
return -1;
}
#ifdef DEBUG
ohci_dump(&gohci, 1);
#else
ohci_mdelay(1);
#endif
ohci_inited = 1;
return 0;
}
int usb_lowlevel_stop(int index)
{
/* this gets called really early - before the controller has */
/* even been initialized! */
if (!ohci_inited)
return 0;
/* TODO release any interrupts, etc. */
/* call hc_release_ohci() here ? */
hc_reset(&gohci);
/* This driver is no longer initialised. It needs a new low-level
* init (board/cpu) before it can be used again. */
ohci_inited = 0;
return 0;
}
int submit_control_msg(struct usb_device *dev, unsigned long pipe,
void *buffer, int transfer_len, struct devrequest *setup)
{
return _ohci_submit_control_msg(&gohci, dev, pipe, buffer,
transfer_len, setup);
}
#endif
#if CONFIG_IS_ENABLED(DM_USB)
static int ohci_submit_control_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
struct devrequest *setup)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return _ohci_submit_control_msg(ohci, udev, pipe, buffer,
length, setup);
}
static int ohci_submit_bulk_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return submit_common_msg(ohci, udev, pipe, buffer, length, NULL, 0);
}
static int ohci_submit_int_msg(struct udevice *dev, struct usb_device *udev,
unsigned long pipe, void *buffer, int length,
int interval, bool nonblock)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return submit_common_msg(ohci, udev, pipe, buffer, length,
NULL, interval);
}
static struct int_queue *ohci_create_int_queue(struct udevice *dev,
struct usb_device *udev, unsigned long pipe, int queuesize,
int elementsize, void *buffer, int interval)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return _ohci_create_int_queue(ohci, udev, pipe, queuesize, elementsize,
buffer, interval);
}
static void *ohci_poll_int_queue(struct udevice *dev, struct usb_device *udev,
struct int_queue *queue)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return _ohci_poll_int_queue(ohci, udev, queue);
}
static int ohci_destroy_int_queue(struct udevice *dev, struct usb_device *udev,
struct int_queue *queue)
{
ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
return _ohci_destroy_int_queue(ohci, udev, queue);
}
int ohci_register(struct udevice *dev, struct ohci_regs *regs)
{
struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
ohci_t *ohci = dev_get_priv(dev);
u32 reg;
priv->desc_before_addr = true;
ohci->regs = regs;
ohci->hcca = memalign(256, sizeof(struct ohci_hcca));
if (!ohci->hcca)
return -ENOMEM;
memset(ohci->hcca, 0, sizeof(struct ohci_hcca));
flush_dcache_hcca(ohci->hcca);
if (hc_reset(ohci) < 0)
return -EIO;
if (hc_start(ohci) < 0)
return -EIO;
reg = ohci_readl(&regs->revision);
printf("USB OHCI %x.%x\n", (reg >> 4) & 0xf, reg & 0xf);
return 0;
}
int ohci_deregister(struct udevice *dev)
{
ohci_t *ohci = dev_get_priv(dev);
if (hc_reset(ohci) < 0)
return -EIO;
free(ohci->hcca);
return 0;
}
struct dm_usb_ops ohci_usb_ops = {
.control = ohci_submit_control_msg,
.bulk = ohci_submit_bulk_msg,
.interrupt = ohci_submit_int_msg,
.create_int_queue = ohci_create_int_queue,
.poll_int_queue = ohci_poll_int_queue,
.destroy_int_queue = ohci_destroy_int_queue,
};
#endif