From 692f238a2abea35607bc8c9e76d26ae5b15518da Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 24 Jun 2011 16:18:13 +0200
Subject: [PATCH 12/35] usb-ehci: Add support for registering companion
controllers
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
hw/usb-ehci.c | 174 +++++++++++++++++++++++++++++++++++++++++++++++----------
1 files changed, 144 insertions(+), 30 deletions(-)
diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c
index 973c342..ec68c29 100644
--- a/hw/usb-ehci.c
+++ b/hw/usb-ehci.c
@@ -20,9 +20,6 @@
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
- *
- * TODO:
- * o Downstream port handoff
*/
#include "hw.h"
@@ -106,7 +103,7 @@
* Bits that are reserved or are read-only are masked out of values
* written to us by software
*/
-#define PORTSC_RO_MASK 0x007021c0
+#define PORTSC_RO_MASK 0x007001c0
#define PORTSC_RWC_MASK 0x0000002a
#define PORTSC_WKOC_E (1 << 22) // Wake on Over Current Enable
#define PORTSC_WKDS_E (1 << 21) // Wake on Disconnect Enable
@@ -373,6 +370,7 @@ struct EHCIState {
qemu_irq irq;
target_phys_addr_t mem_base;
int mem;
+ int companion_count;
/* properties */
uint32_t freq;
@@ -408,6 +406,7 @@ struct EHCIState {
int astate; // Current state in asynchronous schedule
int pstate; // Current state in periodic schedule
USBPort ports[NB_PORTS];
+ USBPort *companion_ports[NB_PORTS];
uint32_t usbsts_pending;
QTAILQ_HEAD(, EHCIQueue) queues;
@@ -730,17 +729,17 @@ static void ehci_attach(USBPort *port)
trace_usb_ehci_port_attach(port->index, port->dev->product_desc);
+ if (*portsc & PORTSC_POWNER) {
+ USBPort *companion = s->companion_ports[port->index];
+ companion->dev = port->dev;
+ companion->ops->attach(companion);
+ return;
+ }
+
*portsc |= PORTSC_CONNECT;
*portsc |= PORTSC_CSC;
- /*
- * If a high speed device is attached then we own this port(indicated
- * by zero in the PORTSC_POWNER bit field) so set the status bit
- * and set an interrupt if enabled.
- */
- if ( !(*portsc & PORTSC_POWNER)) {
- ehci_set_interrupt(s, USBSTS_PCD);
- }
+ ehci_set_interrupt(s, USBSTS_PCD);
}
static void ehci_detach(USBPort *port)
@@ -750,36 +749,110 @@ static void ehci_detach(USBPort *port)
trace_usb_ehci_port_detach(port->index);
+ if (*portsc & PORTSC_POWNER) {
+ USBPort *companion = s->companion_ports[port->index];
+ companion->ops->detach(companion);
+ companion->dev = NULL;
+ return;
+ }
+
ehci_queues_rip_device(s, port->dev);
*portsc &= ~(PORTSC_CONNECT|PORTSC_PED);
*portsc |= PORTSC_CSC;
- /*
- * If a high speed device is attached then we own this port(indicated
- * by zero in the PORTSC_POWNER bit field) so set the status bit
- * and set an interrupt if enabled.
- */
- if ( !(*portsc & PORTSC_POWNER)) {
- ehci_set_interrupt(s, USBSTS_PCD);
- }
+ ehci_set_interrupt(s, USBSTS_PCD);
}
static void ehci_child_detach(USBPort *port, USBDevice *child)
{
EHCIState *s = port->opaque;
+ uint32_t portsc = s->portsc[port->index];
+
+ if (portsc & PORTSC_POWNER) {
+ USBPort *companion = s->companion_ports[port->index];
+ companion->ops->child_detach(companion, child);
+ companion->dev = NULL;
+ return;
+ }
ehci_queues_rip_device(s, child);
}
+static void ehci_wakeup(USBPort *port)
+{
+ EHCIState *s = port->opaque;
+ uint32_t portsc = s->portsc[port->index];
+
+ if (portsc & PORTSC_POWNER) {
+ USBPort *companion = s->companion_ports[port->index];
+ if (companion->ops->wakeup) {
+ companion->ops->wakeup(companion);
+ }
+ }
+}
+
+static int ehci_register_companion(USBBus *bus, USBPort *ports[],
+ uint32_t portcount, uint32_t firstport)
+{
+ EHCIState *s = container_of(bus, EHCIState, bus);
+ uint32_t i;
+
+ if (firstport + portcount > NB_PORTS) {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, "firstport",
+ "firstport on masterbus");
+ error_printf_unless_qmp(
+ "firstport value of %u makes companion take ports %u - %u, which "
+ "is outside of the valid range of 0 - %u\n", firstport, firstport,
+ firstport + portcount - 1, NB_PORTS - 1);
+ return -1;
+ }
+
+ for (i = 0; i < portcount; i++) {
+ if (s->companion_ports[firstport + i]) {
+ qerror_report(QERR_INVALID_PARAMETER_VALUE, "masterbus",
+ "an USB masterbus");
+ error_printf_unless_qmp(
+ "port %u on masterbus %s already has a companion assigned\n",
+ firstport + i, bus->qbus.name);
+ return -1;
+ }
+ }
+
+ for (i = 0; i < portcount; i++) {
+ s->companion_ports[firstport + i] = ports[i];
+ s->ports[firstport + i].speedmask |=
+ USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL;
+ /* Ensure devs attached before the initial reset go to the companion */
+ s->portsc[firstport + i] = PORTSC_POWNER;
+ }
+
+ s->companion_count++;
+ s->mmio[0x05] = (s->companion_count << 4) | portcount;
+
+ return 0;
+}
+
/* 4.1 host controller initialization */
static void ehci_reset(void *opaque)
{
EHCIState *s = opaque;
int i;
+ USBDevice *devs[NB_PORTS];
trace_usb_ehci_reset();
+ /*
+ * Do the detach before touching portsc, so that it correctly gets send to
+ * us or to our companion based on PORTSC_POWNER before the reset.
+ */
+ for(i = 0; i < NB_PORTS; i++) {
+ devs[i] = s->ports[i].dev;
+ if (devs[i]) {
+ usb_attach(&s->ports[i], NULL);
+ }
+ }
+
memset(&s->mmio[OPREGBASE], 0x00, MMIO_SIZE - OPREGBASE);
s->usbcmd = NB_MAXINTRATE << USBCMD_ITC_SH;
@@ -791,10 +864,13 @@ static void ehci_reset(void *opaque)
s->attach_poll_counter = 0;
for(i = 0; i < NB_PORTS; i++) {
- s->portsc[i] = PORTSC_POWNER | PORTSC_PPOWER;
-
- if (s->ports[i].dev) {
- usb_attach(&s->ports[i], s->ports[i].dev);
+ if (s->companion_ports[i]) {
+ s->portsc[i] = PORTSC_POWNER | PORTSC_PPOWER;
+ } else {
+ s->portsc[i] = PORTSC_PPOWER;
+ }
+ if (devs[i]) {
+ usb_attach(&s->ports[i], devs[i]);
}
}
ehci_queues_rip_all(s);
@@ -844,6 +920,34 @@ static void ehci_mem_writew(void *ptr, target_phys_addr_t addr, uint32_t val)
exit(1);
}
+static void handle_port_owner_write(EHCIState *s, int port, uint32_t owner)
+{
+ USBDevice *dev = s->ports[port].dev;
+ uint32_t *portsc = &s->portsc[port];
+ uint32_t orig;
+
+ if (s->companion_ports[port] == NULL)
+ return;
+
+ owner = owner & PORTSC_POWNER;
+ orig = *portsc & PORTSC_POWNER;
+
+ if (!(owner ^ orig)) {
+ return;
+ }
+
+ if (dev) {
+ usb_attach(&s->ports[port], NULL);
+ }
+
+ *portsc &= ~PORTSC_POWNER;
+ *portsc |= owner;
+
+ if (dev) {
+ usb_attach(&s->ports[port], dev);
+ }
+}
+
static void handle_port_status_write(EHCIState *s, int port, uint32_t val)
{
uint32_t *portsc = &s->portsc[port];
@@ -853,6 +957,9 @@ static void handle_port_status_write(EHCIState *s, int port, uint32_t val)
*portsc &= ~(val & PORTSC_RWC_MASK);
/* The guest may clear, but not set the PED bit */
*portsc &= val | ~PORTSC_PED;
+ /* POWNER is masked out by RO_MASK as it is RO when we've no companion */
+ handle_port_owner_write(s, port, val);
+ /* And finally apply RO_MASK */
val &= PORTSC_RO_MASK;
if ((val & PORTSC_PRESET) && !(*portsc & PORTSC_PRESET)) {
@@ -956,7 +1063,7 @@ static void ehci_mem_writel(void *ptr, target_phys_addr_t addr, uint32_t val)
val &= 0x1;
if (val) {
for(i = 0; i < NB_PORTS; i++)
- s->portsc[i] &= ~PORTSC_POWNER;
+ handle_port_owner_write(s, i, 0);
}
break;
@@ -1114,8 +1221,17 @@ static int ehci_buffer_rw(EHCIQueue *q, int bytes, int rw)
static void ehci_async_complete_packet(USBPort *port, USBPacket *packet)
{
- EHCIQueue *q = container_of(packet, EHCIQueue, packet);
+ EHCIQueue *q;
+ EHCIState *s = port->opaque;
+ uint32_t portsc = s->portsc[port->index];
+
+ if (portsc & PORTSC_POWNER) {
+ USBPort *companion = s->companion_ports[port->index];
+ companion->ops->complete(companion, packet);
+ return;
+ }
+ q = container_of(packet, EHCIQueue, packet);
trace_usb_ehci_queue_action(q, "wakeup");
assert(q->async == EHCI_ASYNC_INFLIGHT);
q->async = EHCI_ASYNC_FINISHED;
@@ -1245,8 +1361,6 @@ static int ehci_execute(EHCIQueue *q)
port = &q->ehci->ports[i];
dev = port->dev;
- // TODO sometime we will also need to check if we are the port owner
-
if (!(q->ehci->portsc[i] &(PORTSC_CONNECT))) {
DPRINTF("Port %d, no exec, not connected(%08X)\n",
i, q->ehci->portsc[i]);
@@ -1339,8 +1453,6 @@ static int ehci_process_itd(EHCIState *ehci,
port = &ehci->ports[j];
dev = port->dev;
- // TODO sometime we will also need to check if we are the port owner
-
if (!(ehci->portsc[j] &(PORTSC_CONNECT))) {
continue;
}
@@ -2124,10 +2236,12 @@ static USBPortOps ehci_port_ops = {
.attach = ehci_attach,
.detach = ehci_detach,
.child_detach = ehci_child_detach,
+ .wakeup = ehci_wakeup,
.complete = ehci_async_complete_packet,
};
static USBBusOps ehci_bus_ops = {
+ .register_companion = ehci_register_companion,
};
static PCIDeviceInfo ehci_info = {
--
1.7.5.1