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qemu-patch-raspberry4/hw/usb-uhci.c
Anthony Liguori e855761ca8 qdev: prepare source tree for code conversion 
These are various small stylistic changes which help make things more
consistent such that the automated conversion script can be simpler.

It's not necessary to agree or disagree with these style changes because all
of this code is going to be rewritten by the patch monkey script anyway.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-01-27 10:50:47 -06:00

1295 lines
33 KiB
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/*
* USB UHCI controller emulation
*
* Copyright (c) 2005 Fabrice Bellard
*
* Copyright (c) 2008 Max Krasnyansky
* Magor rewrite of the UHCI data structures parser and frame processor
* Support for fully async operation and multiple outstanding transactions
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "usb.h"
#include "pci.h"
#include "qemu-timer.h"
#include "usb-uhci.h"
#include "iov.h"
#include "dma.h"
//#define DEBUG
//#define DEBUG_DUMP_DATA
#define UHCI_CMD_FGR (1 << 4)
#define UHCI_CMD_EGSM (1 << 3)
#define UHCI_CMD_GRESET (1 << 2)
#define UHCI_CMD_HCRESET (1 << 1)
#define UHCI_CMD_RS (1 << 0)
#define UHCI_STS_HCHALTED (1 << 5)
#define UHCI_STS_HCPERR (1 << 4)
#define UHCI_STS_HSERR (1 << 3)
#define UHCI_STS_RD (1 << 2)
#define UHCI_STS_USBERR (1 << 1)
#define UHCI_STS_USBINT (1 << 0)
#define TD_CTRL_SPD (1 << 29)
#define TD_CTRL_ERROR_SHIFT 27
#define TD_CTRL_IOS (1 << 25)
#define TD_CTRL_IOC (1 << 24)
#define TD_CTRL_ACTIVE (1 << 23)
#define TD_CTRL_STALL (1 << 22)
#define TD_CTRL_BABBLE (1 << 20)
#define TD_CTRL_NAK (1 << 19)
#define TD_CTRL_TIMEOUT (1 << 18)
#define UHCI_PORT_SUSPEND (1 << 12)
#define UHCI_PORT_RESET (1 << 9)
#define UHCI_PORT_LSDA (1 << 8)
#define UHCI_PORT_RD (1 << 6)
#define UHCI_PORT_ENC (1 << 3)
#define UHCI_PORT_EN (1 << 2)
#define UHCI_PORT_CSC (1 << 1)
#define UHCI_PORT_CCS (1 << 0)
#define UHCI_PORT_READ_ONLY (0x1bb)
#define UHCI_PORT_WRITE_CLEAR (UHCI_PORT_CSC | UHCI_PORT_ENC)
#define FRAME_TIMER_FREQ 1000
#define FRAME_MAX_LOOPS 100
#define NB_PORTS 2
#ifdef DEBUG
#define DPRINTF printf
static const char *pid2str(int pid)
{
switch (pid) {
case USB_TOKEN_SETUP: return "SETUP";
case USB_TOKEN_IN: return "IN";
case USB_TOKEN_OUT: return "OUT";
}
return "?";
}
#else
#define DPRINTF(...)
#endif
#ifdef DEBUG_DUMP_DATA
static void dump_data(USBPacket *p, int ret)
{
iov_hexdump(p->iov.iov, p->iov.niov, stderr, "uhci", ret);
}
#else
static void dump_data(USBPacket *p, int ret) {}
#endif
typedef struct UHCIState UHCIState;
/*
* Pending async transaction.
* 'packet' must be the first field because completion
* handler does "(UHCIAsync *) pkt" cast.
*/
typedef struct UHCIAsync {
USBPacket packet;
QEMUSGList sgl;
UHCIState *uhci;
QTAILQ_ENTRY(UHCIAsync) next;
uint32_t td;
uint32_t token;
int8_t valid;
uint8_t isoc;
uint8_t done;
} UHCIAsync;
typedef struct UHCIPort {
USBPort port;
uint16_t ctrl;
} UHCIPort;
struct UHCIState {
PCIDevice dev;
MemoryRegion io_bar;
USBBus bus; /* Note unused when we're a companion controller */
uint16_t cmd; /* cmd register */
uint16_t status;
uint16_t intr; /* interrupt enable register */
uint16_t frnum; /* frame number */
uint32_t fl_base_addr; /* frame list base address */
uint8_t sof_timing;
uint8_t status2; /* bit 0 and 1 are used to generate UHCI_STS_USBINT */
int64_t expire_time;
QEMUTimer *frame_timer;
UHCIPort ports[NB_PORTS];
/* Interrupts that should be raised at the end of the current frame. */
uint32_t pending_int_mask;
/* Active packets */
QTAILQ_HEAD(,UHCIAsync) async_pending;
uint8_t num_ports_vmstate;
/* Properties */
char *masterbus;
uint32_t firstport;
};
typedef struct UHCI_TD {
uint32_t link;
uint32_t ctrl; /* see TD_CTRL_xxx */
uint32_t token;
uint32_t buffer;
} UHCI_TD;
typedef struct UHCI_QH {
uint32_t link;
uint32_t el_link;
} UHCI_QH;
static UHCIAsync *uhci_async_alloc(UHCIState *s)
{
UHCIAsync *async = g_malloc(sizeof(UHCIAsync));
memset(&async->packet, 0, sizeof(async->packet));
async->uhci = s;
async->valid = 0;
async->td = 0;
async->token = 0;
async->done = 0;
async->isoc = 0;
usb_packet_init(&async->packet);
pci_dma_sglist_init(&async->sgl, &s->dev, 1);
return async;
}
static void uhci_async_free(UHCIState *s, UHCIAsync *async)
{
usb_packet_cleanup(&async->packet);
qemu_sglist_destroy(&async->sgl);
g_free(async);
}
static void uhci_async_link(UHCIState *s, UHCIAsync *async)
{
QTAILQ_INSERT_HEAD(&s->async_pending, async, next);
}
static void uhci_async_unlink(UHCIState *s, UHCIAsync *async)
{
QTAILQ_REMOVE(&s->async_pending, async, next);
}
static void uhci_async_cancel(UHCIState *s, UHCIAsync *async)
{
DPRINTF("uhci: cancel td 0x%x token 0x%x done %u\n",
async->td, async->token, async->done);
if (!async->done)
usb_cancel_packet(&async->packet);
uhci_async_free(s, async);
}
/*
* Mark all outstanding async packets as invalid.
* This is used for canceling them when TDs are removed by the HCD.
*/
static UHCIAsync *uhci_async_validate_begin(UHCIState *s)
{
UHCIAsync *async;
QTAILQ_FOREACH(async, &s->async_pending, next) {
async->valid--;
}
return NULL;
}
/*
* Cancel async packets that are no longer valid
*/
static void uhci_async_validate_end(UHCIState *s)
{
UHCIAsync *curr, *n;
QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) {
if (curr->valid > 0) {
continue;
}
uhci_async_unlink(s, curr);
uhci_async_cancel(s, curr);
}
}
static void uhci_async_cancel_device(UHCIState *s, USBDevice *dev)
{
UHCIAsync *curr, *n;
QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) {
if (curr->packet.owner == NULL ||
curr->packet.owner->dev != dev) {
continue;
}
uhci_async_unlink(s, curr);
uhci_async_cancel(s, curr);
}
}
static void uhci_async_cancel_all(UHCIState *s)
{
UHCIAsync *curr, *n;
QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) {
uhci_async_unlink(s, curr);
uhci_async_cancel(s, curr);
}
}
static UHCIAsync *uhci_async_find_td(UHCIState *s, uint32_t addr, uint32_t token)
{
UHCIAsync *async;
UHCIAsync *match = NULL;
int count = 0;
/*
* We're looking for the best match here. ie both td addr and token.
* Otherwise we return last good match. ie just token.
* It's ok to match just token because it identifies the transaction
* rather well, token includes: device addr, endpoint, size, etc.
*
* Also since we queue async transactions in reverse order by returning
* last good match we restores the order.
*
* It's expected that we wont have a ton of outstanding transactions.
* If we ever do we'd want to optimize this algorithm.
*/
QTAILQ_FOREACH(async, &s->async_pending, next) {
if (async->token == token) {
/* Good match */
match = async;
if (async->td == addr) {
/* Best match */
break;
}
}
count++;
}
if (count > 64)
fprintf(stderr, "uhci: warning lots of async transactions\n");
return match;
}
static void uhci_update_irq(UHCIState *s)
{
int level;
if (((s->status2 & 1) && (s->intr & (1 << 2))) ||
((s->status2 & 2) && (s->intr & (1 << 3))) ||
((s->status & UHCI_STS_USBERR) && (s->intr & (1 << 0))) ||
((s->status & UHCI_STS_RD) && (s->intr & (1 << 1))) ||
(s->status & UHCI_STS_HSERR) ||
(s->status & UHCI_STS_HCPERR)) {
level = 1;
} else {
level = 0;
}
qemu_set_irq(s->dev.irq[3], level);
}
static void uhci_reset(void *opaque)
{
UHCIState *s = opaque;
uint8_t *pci_conf;
int i;
UHCIPort *port;
DPRINTF("uhci: full reset\n");
pci_conf = s->dev.config;
pci_conf[0x6a] = 0x01; /* usb clock */
pci_conf[0x6b] = 0x00;
s->cmd = 0;
s->status = 0;
s->status2 = 0;
s->intr = 0;
s->fl_base_addr = 0;
s->sof_timing = 64;
for(i = 0; i < NB_PORTS; i++) {
port = &s->ports[i];
port->ctrl = 0x0080;
if (port->port.dev && port->port.dev->attached) {
usb_reset(&port->port);
}
}
uhci_async_cancel_all(s);
}
static void uhci_pre_save(void *opaque)
{
UHCIState *s = opaque;
uhci_async_cancel_all(s);
}
static const VMStateDescription vmstate_uhci_port = {
.name = "uhci port",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT16(ctrl, UHCIPort),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_uhci = {
.name = "uhci",
.version_id = 2,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.pre_save = uhci_pre_save,
.fields = (VMStateField []) {
VMSTATE_PCI_DEVICE(dev, UHCIState),
VMSTATE_UINT8_EQUAL(num_ports_vmstate, UHCIState),
VMSTATE_STRUCT_ARRAY(ports, UHCIState, NB_PORTS, 1,
vmstate_uhci_port, UHCIPort),
VMSTATE_UINT16(cmd, UHCIState),
VMSTATE_UINT16(status, UHCIState),
VMSTATE_UINT16(intr, UHCIState),
VMSTATE_UINT16(frnum, UHCIState),
VMSTATE_UINT32(fl_base_addr, UHCIState),
VMSTATE_UINT8(sof_timing, UHCIState),
VMSTATE_UINT8(status2, UHCIState),
VMSTATE_TIMER(frame_timer, UHCIState),
VMSTATE_INT64_V(expire_time, UHCIState, 2),
VMSTATE_END_OF_LIST()
}
};
static void uhci_ioport_writeb(void *opaque, uint32_t addr, uint32_t val)
{
UHCIState *s = opaque;
addr &= 0x1f;
switch(addr) {
case 0x0c:
s->sof_timing = val;
break;
}
}
static uint32_t uhci_ioport_readb(void *opaque, uint32_t addr)
{
UHCIState *s = opaque;
uint32_t val;
addr &= 0x1f;
switch(addr) {
case 0x0c:
val = s->sof_timing;
break;
default:
val = 0xff;
break;
}
return val;
}
static void uhci_ioport_writew(void *opaque, uint32_t addr, uint32_t val)
{
UHCIState *s = opaque;
addr &= 0x1f;
DPRINTF("uhci: writew port=0x%04x val=0x%04x\n", addr, val);
switch(addr) {
case 0x00:
if ((val & UHCI_CMD_RS) && !(s->cmd & UHCI_CMD_RS)) {
/* start frame processing */
s->expire_time = qemu_get_clock_ns(vm_clock) +
(get_ticks_per_sec() / FRAME_TIMER_FREQ);
qemu_mod_timer(s->frame_timer, qemu_get_clock_ns(vm_clock));
s->status &= ~UHCI_STS_HCHALTED;
} else if (!(val & UHCI_CMD_RS)) {
s->status |= UHCI_STS_HCHALTED;
}
if (val & UHCI_CMD_GRESET) {
UHCIPort *port;
USBDevice *dev;
int i;
/* send reset on the USB bus */
for(i = 0; i < NB_PORTS; i++) {
port = &s->ports[i];
dev = port->port.dev;
if (dev && dev->attached) {
usb_send_msg(dev, USB_MSG_RESET);
}
}
uhci_reset(s);
return;
}
if (val & UHCI_CMD_HCRESET) {
uhci_reset(s);
return;
}
s->cmd = val;
break;
case 0x02:
s->status &= ~val;
/* XXX: the chip spec is not coherent, so we add a hidden
register to distinguish between IOC and SPD */
if (val & UHCI_STS_USBINT)
s->status2 = 0;
uhci_update_irq(s);
break;
case 0x04:
s->intr = val;
uhci_update_irq(s);
break;
case 0x06:
if (s->status & UHCI_STS_HCHALTED)
s->frnum = val & 0x7ff;
break;
case 0x10 ... 0x1f:
{
UHCIPort *port;
USBDevice *dev;
int n;
n = (addr >> 1) & 7;
if (n >= NB_PORTS)
return;
port = &s->ports[n];
dev = port->port.dev;
if (dev && dev->attached) {
/* port reset */
if ( (val & UHCI_PORT_RESET) &&
!(port->ctrl & UHCI_PORT_RESET) ) {
usb_send_msg(dev, USB_MSG_RESET);
}
}
port->ctrl &= UHCI_PORT_READ_ONLY;
port->ctrl |= (val & ~UHCI_PORT_READ_ONLY);
/* some bits are reset when a '1' is written to them */
port->ctrl &= ~(val & UHCI_PORT_WRITE_CLEAR);
}
break;
}
}
static uint32_t uhci_ioport_readw(void *opaque, uint32_t addr)
{
UHCIState *s = opaque;
uint32_t val;
addr &= 0x1f;
switch(addr) {
case 0x00:
val = s->cmd;
break;
case 0x02:
val = s->status;
break;
case 0x04:
val = s->intr;
break;
case 0x06:
val = s->frnum;
break;
case 0x10 ... 0x1f:
{
UHCIPort *port;
int n;
n = (addr >> 1) & 7;
if (n >= NB_PORTS)
goto read_default;
port = &s->ports[n];
val = port->ctrl;
}
break;
default:
read_default:
val = 0xff7f; /* disabled port */
break;
}
DPRINTF("uhci: readw port=0x%04x val=0x%04x\n", addr, val);
return val;
}
static void uhci_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
{
UHCIState *s = opaque;
addr &= 0x1f;
DPRINTF("uhci: writel port=0x%04x val=0x%08x\n", addr, val);
switch(addr) {
case 0x08:
s->fl_base_addr = val & ~0xfff;
break;
}
}
static uint32_t uhci_ioport_readl(void *opaque, uint32_t addr)
{
UHCIState *s = opaque;
uint32_t val;
addr &= 0x1f;
switch(addr) {
case 0x08:
val = s->fl_base_addr;
break;
default:
val = 0xffffffff;
break;
}
return val;
}
/* signal resume if controller suspended */
static void uhci_resume (void *opaque)
{
UHCIState *s = (UHCIState *)opaque;
if (!s)
return;
if (s->cmd & UHCI_CMD_EGSM) {
s->cmd |= UHCI_CMD_FGR;
s->status |= UHCI_STS_RD;
uhci_update_irq(s);
}
}
static void uhci_attach(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
/* set connect status */
port->ctrl |= UHCI_PORT_CCS | UHCI_PORT_CSC;
/* update speed */
if (port->port.dev->speed == USB_SPEED_LOW) {
port->ctrl |= UHCI_PORT_LSDA;
} else {
port->ctrl &= ~UHCI_PORT_LSDA;
}
uhci_resume(s);
}
static void uhci_detach(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
uhci_async_cancel_device(s, port1->dev);
/* set connect status */
if (port->ctrl & UHCI_PORT_CCS) {
port->ctrl &= ~UHCI_PORT_CCS;
port->ctrl |= UHCI_PORT_CSC;
}
/* disable port */
if (port->ctrl & UHCI_PORT_EN) {
port->ctrl &= ~UHCI_PORT_EN;
port->ctrl |= UHCI_PORT_ENC;
}
uhci_resume(s);
}
static void uhci_child_detach(USBPort *port1, USBDevice *child)
{
UHCIState *s = port1->opaque;
uhci_async_cancel_device(s, child);
}
static void uhci_wakeup(USBPort *port1)
{
UHCIState *s = port1->opaque;
UHCIPort *port = &s->ports[port1->index];
if (port->ctrl & UHCI_PORT_SUSPEND && !(port->ctrl & UHCI_PORT_RD)) {
port->ctrl |= UHCI_PORT_RD;
uhci_resume(s);
}
}
static int uhci_broadcast_packet(UHCIState *s, USBPacket *p)
{
int i, ret;
DPRINTF("uhci: packet enter. pid %s addr 0x%02x ep %d len %zd\n",
pid2str(p->pid), p->devaddr, p->devep, p->iov.size);
if (p->pid == USB_TOKEN_OUT || p->pid == USB_TOKEN_SETUP)
dump_data(p, 0);
ret = USB_RET_NODEV;
for (i = 0; i < NB_PORTS && ret == USB_RET_NODEV; i++) {
UHCIPort *port = &s->ports[i];
USBDevice *dev = port->port.dev;
if (dev && dev->attached && (port->ctrl & UHCI_PORT_EN)) {
ret = usb_handle_packet(dev, p);
}
}
DPRINTF("uhci: packet exit. ret %d len %zd\n", ret, p->iov.size);
if (p->pid == USB_TOKEN_IN && ret > 0)
dump_data(p, ret);
return ret;
}
static void uhci_async_complete(USBPort *port, USBPacket *packet);
static void uhci_process_frame(UHCIState *s);
/* return -1 if fatal error (frame must be stopped)
0 if TD successful
1 if TD unsuccessful or inactive
*/
static int uhci_complete_td(UHCIState *s, UHCI_TD *td, UHCIAsync *async, uint32_t *int_mask)
{
int len = 0, max_len, err, ret;
uint8_t pid;
max_len = ((td->token >> 21) + 1) & 0x7ff;
pid = td->token & 0xff;
ret = async->packet.result;
if (td->ctrl & TD_CTRL_IOS)
td->ctrl &= ~TD_CTRL_ACTIVE;
if (ret < 0)
goto out;
len = async->packet.result;
td->ctrl = (td->ctrl & ~0x7ff) | ((len - 1) & 0x7ff);
/* The NAK bit may have been set by a previous frame, so clear it
here. The docs are somewhat unclear, but win2k relies on this
behavior. */
td->ctrl &= ~(TD_CTRL_ACTIVE | TD_CTRL_NAK);
if (td->ctrl & TD_CTRL_IOC)
*int_mask |= 0x01;
if (pid == USB_TOKEN_IN) {
if (len > max_len) {
ret = USB_RET_BABBLE;
goto out;
}
if ((td->ctrl & TD_CTRL_SPD) && len < max_len) {
*int_mask |= 0x02;
/* short packet: do not update QH */
DPRINTF("uhci: short packet. td 0x%x token 0x%x\n", async->td, async->token);
return 1;
}
}
/* success */
return 0;
out:
switch(ret) {
case USB_RET_STALL:
td->ctrl |= TD_CTRL_STALL;
td->ctrl &= ~TD_CTRL_ACTIVE;
s->status |= UHCI_STS_USBERR;
if (td->ctrl & TD_CTRL_IOC) {
*int_mask |= 0x01;
}
uhci_update_irq(s);
return 1;
case USB_RET_BABBLE:
td->ctrl |= TD_CTRL_BABBLE | TD_CTRL_STALL;
td->ctrl &= ~TD_CTRL_ACTIVE;
s->status |= UHCI_STS_USBERR;
if (td->ctrl & TD_CTRL_IOC) {
*int_mask |= 0x01;
}
uhci_update_irq(s);
/* frame interrupted */
return -1;
case USB_RET_NAK:
td->ctrl |= TD_CTRL_NAK;
if (pid == USB_TOKEN_SETUP)
break;
return 1;
case USB_RET_NODEV:
default:
break;
}
/* Retry the TD if error count is not zero */
td->ctrl |= TD_CTRL_TIMEOUT;
err = (td->ctrl >> TD_CTRL_ERROR_SHIFT) & 3;
if (err != 0) {
err--;
if (err == 0) {
td->ctrl &= ~TD_CTRL_ACTIVE;
s->status |= UHCI_STS_USBERR;
if (td->ctrl & TD_CTRL_IOC)
*int_mask |= 0x01;
uhci_update_irq(s);
}
}
td->ctrl = (td->ctrl & ~(3 << TD_CTRL_ERROR_SHIFT)) |
(err << TD_CTRL_ERROR_SHIFT);
return 1;
}
static int uhci_handle_td(UHCIState *s, uint32_t addr, UHCI_TD *td, uint32_t *int_mask)
{
UHCIAsync *async;
int len = 0, max_len;
uint8_t pid, isoc;
uint32_t token;
/* Is active ? */
if (!(td->ctrl & TD_CTRL_ACTIVE))
return 1;
/* token field is not unique for isochronous requests,
* so use the destination buffer
*/
if (td->ctrl & TD_CTRL_IOS) {
token = td->buffer;
isoc = 1;
} else {
token = td->token;
isoc = 0;
}
async = uhci_async_find_td(s, addr, token);
if (async) {
/* Already submitted */
async->valid = 32;
if (!async->done)
return 1;
uhci_async_unlink(s, async);
goto done;
}
/* Allocate new packet */
async = uhci_async_alloc(s);
if (!async)
return 1;
/* valid needs to be large enough to handle 10 frame delay
* for initial isochronous requests
*/
async->valid = 32;
async->td = addr;
async->token = token;
async->isoc = isoc;
max_len = ((td->token >> 21) + 1) & 0x7ff;
pid = td->token & 0xff;
usb_packet_setup(&async->packet, pid, (td->token >> 8) & 0x7f,
(td->token >> 15) & 0xf);
qemu_sglist_add(&async->sgl, td->buffer, max_len);
usb_packet_map(&async->packet, &async->sgl);
switch(pid) {
case USB_TOKEN_OUT:
case USB_TOKEN_SETUP:
len = uhci_broadcast_packet(s, &async->packet);
if (len >= 0)
len = max_len;
break;
case USB_TOKEN_IN:
len = uhci_broadcast_packet(s, &async->packet);
break;
default:
/* invalid pid : frame interrupted */
uhci_async_free(s, async);
s->status |= UHCI_STS_HCPERR;
uhci_update_irq(s);
return -1;
}
if (len == USB_RET_ASYNC) {
uhci_async_link(s, async);
return 2;
}
async->packet.result = len;
done:
len = uhci_complete_td(s, td, async, int_mask);
usb_packet_unmap(&async->packet);
uhci_async_free(s, async);
return len;
}
static void uhci_async_complete(USBPort *port, USBPacket *packet)
{
UHCIAsync *async = container_of(packet, UHCIAsync, packet);
UHCIState *s = async->uhci;
DPRINTF("uhci: async complete. td 0x%x token 0x%x\n", async->td, async->token);
if (async->isoc) {
UHCI_TD td;
uint32_t link = async->td;
uint32_t int_mask = 0, val;
pci_dma_read(&s->dev, link & ~0xf, &td, sizeof(td));
le32_to_cpus(&td.link);
le32_to_cpus(&td.ctrl);
le32_to_cpus(&td.token);
le32_to_cpus(&td.buffer);
uhci_async_unlink(s, async);
uhci_complete_td(s, &td, async, &int_mask);
s->pending_int_mask |= int_mask;
/* update the status bits of the TD */
val = cpu_to_le32(td.ctrl);
pci_dma_write(&s->dev, (link & ~0xf) + 4, &val, sizeof(val));
uhci_async_free(s, async);
} else {
async->done = 1;
uhci_process_frame(s);
}
}
static int is_valid(uint32_t link)
{
return (link & 1) == 0;
}
static int is_qh(uint32_t link)
{
return (link & 2) != 0;
}
static int depth_first(uint32_t link)
{
return (link & 4) != 0;
}
/* QH DB used for detecting QH loops */
#define UHCI_MAX_QUEUES 128
typedef struct {
uint32_t addr[UHCI_MAX_QUEUES];
int count;
} QhDb;
static void qhdb_reset(QhDb *db)
{
db->count = 0;
}
/* Add QH to DB. Returns 1 if already present or DB is full. */
static int qhdb_insert(QhDb *db, uint32_t addr)
{
int i;
for (i = 0; i < db->count; i++)
if (db->addr[i] == addr)
return 1;
if (db->count >= UHCI_MAX_QUEUES)
return 1;
db->addr[db->count++] = addr;
return 0;
}
static void uhci_process_frame(UHCIState *s)
{
uint32_t frame_addr, link, old_td_ctrl, val, int_mask;
uint32_t curr_qh;
int cnt, ret;
UHCI_TD td;
UHCI_QH qh;
QhDb qhdb;
frame_addr = s->fl_base_addr + ((s->frnum & 0x3ff) << 2);
DPRINTF("uhci: processing frame %d addr 0x%x\n" , s->frnum, frame_addr);
pci_dma_read(&s->dev, frame_addr, &link, 4);
le32_to_cpus(&link);
int_mask = 0;
curr_qh = 0;
qhdb_reset(&qhdb);
for (cnt = FRAME_MAX_LOOPS; is_valid(link) && cnt; cnt--) {
if (is_qh(link)) {
/* QH */
if (qhdb_insert(&qhdb, link)) {
/*
* We're going in circles. Which is not a bug because
* HCD is allowed to do that as part of the BW management.
* In our case though it makes no sense to spin here. Sync transations
* are already done, and async completion handler will re-process
* the frame when something is ready.
*/
DPRINTF("uhci: detected loop. qh 0x%x\n", link);
break;
}
pci_dma_read(&s->dev, link & ~0xf, &qh, sizeof(qh));
le32_to_cpus(&qh.link);
le32_to_cpus(&qh.el_link);
DPRINTF("uhci: QH 0x%x load. link 0x%x elink 0x%x\n",
link, qh.link, qh.el_link);
if (!is_valid(qh.el_link)) {
/* QH w/o elements */
curr_qh = 0;
link = qh.link;
} else {
/* QH with elements */
curr_qh = link;
link = qh.el_link;
}
continue;
}
/* TD */
pci_dma_read(&s->dev, link & ~0xf, &td, sizeof(td));
le32_to_cpus(&td.link);
le32_to_cpus(&td.ctrl);
le32_to_cpus(&td.token);
le32_to_cpus(&td.buffer);
DPRINTF("uhci: TD 0x%x load. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
link, td.link, td.ctrl, td.token, curr_qh);
old_td_ctrl = td.ctrl;
ret = uhci_handle_td(s, link, &td, &int_mask);
if (old_td_ctrl != td.ctrl) {
/* update the status bits of the TD */
val = cpu_to_le32(td.ctrl);
pci_dma_write(&s->dev, (link & ~0xf) + 4, &val, sizeof(val));
}
if (ret < 0) {
/* interrupted frame */
break;
}
if (ret == 2 || ret == 1) {
DPRINTF("uhci: TD 0x%x %s. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
link, ret == 2 ? "pend" : "skip",
td.link, td.ctrl, td.token, curr_qh);
link = curr_qh ? qh.link : td.link;
continue;
}
/* completed TD */
DPRINTF("uhci: TD 0x%x done. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
link, td.link, td.ctrl, td.token, curr_qh);
link = td.link;
if (curr_qh) {
/* update QH element link */
qh.el_link = link;
val = cpu_to_le32(qh.el_link);
pci_dma_write(&s->dev, (curr_qh & ~0xf) + 4, &val, sizeof(val));
if (!depth_first(link)) {
/* done with this QH */
DPRINTF("uhci: QH 0x%x done. link 0x%x elink 0x%x\n",
curr_qh, qh.link, qh.el_link);
curr_qh = 0;
link = qh.link;
}
}
/* go to the next entry */
}
s->pending_int_mask |= int_mask;
}
static void uhci_frame_timer(void *opaque)
{
UHCIState *s = opaque;
/* prepare the timer for the next frame */
s->expire_time += (get_ticks_per_sec() / FRAME_TIMER_FREQ);
if (!(s->cmd & UHCI_CMD_RS)) {
/* Full stop */
qemu_del_timer(s->frame_timer);
/* set hchalted bit in status - UHCI11D 2.1.2 */
s->status |= UHCI_STS_HCHALTED;
DPRINTF("uhci: halted\n");
return;
}
/* Complete the previous frame */
if (s->pending_int_mask) {
s->status2 |= s->pending_int_mask;
s->status |= UHCI_STS_USBINT;
uhci_update_irq(s);
}
s->pending_int_mask = 0;
/* Start new frame */
s->frnum = (s->frnum + 1) & 0x7ff;
DPRINTF("uhci: new frame #%u\n" , s->frnum);
uhci_async_validate_begin(s);
uhci_process_frame(s);
uhci_async_validate_end(s);
qemu_mod_timer(s->frame_timer, s->expire_time);
}
static const MemoryRegionPortio uhci_portio[] = {
{ 0, 32, 2, .write = uhci_ioport_writew, },
{ 0, 32, 2, .read = uhci_ioport_readw, },
{ 0, 32, 4, .write = uhci_ioport_writel, },
{ 0, 32, 4, .read = uhci_ioport_readl, },
{ 0, 32, 1, .write = uhci_ioport_writeb, },
{ 0, 32, 1, .read = uhci_ioport_readb, },
PORTIO_END_OF_LIST()
};
static const MemoryRegionOps uhci_ioport_ops = {
.old_portio = uhci_portio,
};
static USBPortOps uhci_port_ops = {
.attach = uhci_attach,
.detach = uhci_detach,
.child_detach = uhci_child_detach,
.wakeup = uhci_wakeup,
.complete = uhci_async_complete,
};
static USBBusOps uhci_bus_ops = {
};
static int usb_uhci_common_initfn(PCIDevice *dev)
{
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
uint8_t *pci_conf = s->dev.config;
int i;
pci_conf[PCI_CLASS_PROG] = 0x00;
/* TODO: reset value should be 0. */
pci_conf[PCI_INTERRUPT_PIN] = 4; /* interrupt pin D */
pci_conf[USB_SBRN] = USB_RELEASE_1; // release number
if (s->masterbus) {
USBPort *ports[NB_PORTS];
for(i = 0; i < NB_PORTS; i++) {
ports[i] = &s->ports[i].port;
}
if (usb_register_companion(s->masterbus, ports, NB_PORTS,
s->firstport, s, &uhci_port_ops,
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL) != 0) {
return -1;
}
} else {
usb_bus_new(&s->bus, &uhci_bus_ops, &s->dev.qdev);
for (i = 0; i < NB_PORTS; i++) {
usb_register_port(&s->bus, &s->ports[i].port, s, i, &uhci_port_ops,
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL);
}
}
s->frame_timer = qemu_new_timer_ns(vm_clock, uhci_frame_timer, s);
s->num_ports_vmstate = NB_PORTS;
QTAILQ_INIT(&s->async_pending);
qemu_register_reset(uhci_reset, s);
memory_region_init_io(&s->io_bar, &uhci_ioport_ops, s, "uhci", 0x20);
/* Use region 4 for consistency with real hardware. BSD guests seem
to rely on this. */
pci_register_bar(&s->dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &s->io_bar);
return 0;
}
static int usb_uhci_vt82c686b_initfn(PCIDevice *dev)
{
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
uint8_t *pci_conf = s->dev.config;
/* USB misc control 1/2 */
pci_set_long(pci_conf + 0x40,0x00001000);
/* PM capability */
pci_set_long(pci_conf + 0x80,0x00020001);
/* USB legacy support */
pci_set_long(pci_conf + 0xc0,0x00002000);
return usb_uhci_common_initfn(dev);
}
static int usb_uhci_exit(PCIDevice *dev)
{
UHCIState *s = DO_UPCAST(UHCIState, dev, dev);
memory_region_destroy(&s->io_bar);
return 0;
}
static Property uhci_properties[] = {
DEFINE_PROP_STRING("masterbus", UHCIState, masterbus),
DEFINE_PROP_UINT32("firstport", UHCIState, firstport, 0),
DEFINE_PROP_END_OF_LIST(),
};
static PCIDeviceInfo piix3_uhci_info = {
.qdev.name = "piix3-usb-uhci",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_common_initfn,
.exit = usb_uhci_exit,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82371SB_2,
.revision = 0x01,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static PCIDeviceInfo piix4_uhci_info = {
.qdev.name = "piix4-usb-uhci",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_common_initfn,
.exit = usb_uhci_exit,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82371AB_2,
.revision = 0x01,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static PCIDeviceInfo vt82c686b_uhci_info = {
.qdev.name = "vt82c686b-usb-uhci",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_vt82c686b_initfn,
.exit = usb_uhci_exit,
.vendor_id = PCI_VENDOR_ID_VIA,
.device_id = PCI_DEVICE_ID_VIA_UHCI,
.revision = 0x01,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static PCIDeviceInfo ich9_uhci1_info = {
.qdev.name = "ich9-usb-uhci1",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_common_initfn,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI1,
.revision = 0x03,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static PCIDeviceInfo ich9_uhci2_info = {
.qdev.name = "ich9-usb-uhci2",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_common_initfn,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI2,
.revision = 0x03,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static PCIDeviceInfo ich9_uhci3_info = {
.qdev.name = "ich9-usb-uhci3",
.qdev.size = sizeof(UHCIState),
.qdev.vmsd = &vmstate_uhci,
.init = usb_uhci_common_initfn,
.vendor_id = PCI_VENDOR_ID_INTEL,
.device_id = PCI_DEVICE_ID_INTEL_82801I_UHCI3,
.revision = 0x03,
.class_id = PCI_CLASS_SERIAL_USB,
.qdev.props = uhci_properties,
};
static void uhci_register(void)
{
pci_qdev_register(&piix3_uhci_info);
pci_qdev_register(&piix4_uhci_info);
pci_qdev_register(&vt82c686b_uhci_info);
pci_qdev_register(&ich9_uhci1_info);
pci_qdev_register(&ich9_uhci2_info);
pci_qdev_register(&ich9_uhci3_info);
}
device_init(uhci_register);
void usb_uhci_piix3_init(PCIBus *bus, int devfn)
{
pci_create_simple(bus, devfn, "piix3-usb-uhci");
}
void usb_uhci_piix4_init(PCIBus *bus, int devfn)
{
pci_create_simple(bus, devfn, "piix4-usb-uhci");
}
void usb_uhci_vt82c686b_init(PCIBus *bus, int devfn)
{
pci_create_simple(bus, devfn, "vt82c686b-usb-uhci");
}
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