root / hw / usb-uhci.c @ a0a3167a
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/*
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* USB UHCI controller emulation
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*
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* Copyright (c) 2005 Fabrice Bellard
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*
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* Copyright (c) 2008 Max Krasnyansky
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* Magor rewrite of the UHCI data structures parser and frame processor
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* Support for fully async operation and multiple outstanding transactions
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "hw.h" |
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#include "usb.h" |
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#include "pci.h" |
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#include "qemu-timer.h" |
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#include "usb-uhci.h" |
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//#define DEBUG
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//#define DEBUG_DUMP_DATA
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#define UHCI_CMD_FGR (1 << 4) |
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#define UHCI_CMD_EGSM (1 << 3) |
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#define UHCI_CMD_GRESET (1 << 2) |
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#define UHCI_CMD_HCRESET (1 << 1) |
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#define UHCI_CMD_RS (1 << 0) |
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|
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#define UHCI_STS_HCHALTED (1 << 5) |
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#define UHCI_STS_HCPERR (1 << 4) |
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#define UHCI_STS_HSERR (1 << 3) |
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#define UHCI_STS_RD (1 << 2) |
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#define UHCI_STS_USBERR (1 << 1) |
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#define UHCI_STS_USBINT (1 << 0) |
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|
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#define TD_CTRL_SPD (1 << 29) |
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#define TD_CTRL_ERROR_SHIFT 27 |
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#define TD_CTRL_IOS (1 << 25) |
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#define TD_CTRL_IOC (1 << 24) |
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#define TD_CTRL_ACTIVE (1 << 23) |
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#define TD_CTRL_STALL (1 << 22) |
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#define TD_CTRL_BABBLE (1 << 20) |
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#define TD_CTRL_NAK (1 << 19) |
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#define TD_CTRL_TIMEOUT (1 << 18) |
59 |
|
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#define UHCI_PORT_SUSPEND (1 << 12) |
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#define UHCI_PORT_RESET (1 << 9) |
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#define UHCI_PORT_LSDA (1 << 8) |
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#define UHCI_PORT_RD (1 << 6) |
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#define UHCI_PORT_ENC (1 << 3) |
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#define UHCI_PORT_EN (1 << 2) |
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#define UHCI_PORT_CSC (1 << 1) |
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#define UHCI_PORT_CCS (1 << 0) |
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|
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#define UHCI_PORT_READ_ONLY (0x1bb) |
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#define UHCI_PORT_WRITE_CLEAR (UHCI_PORT_CSC | UHCI_PORT_ENC)
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#define FRAME_TIMER_FREQ 1000 |
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#define FRAME_MAX_LOOPS 100 |
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#define NB_PORTS 2 |
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#ifdef DEBUG
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#define DPRINTF printf
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static const char *pid2str(int pid) |
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{ |
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switch (pid) {
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case USB_TOKEN_SETUP: return "SETUP"; |
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case USB_TOKEN_IN: return "IN"; |
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case USB_TOKEN_OUT: return "OUT"; |
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} |
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return "?"; |
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} |
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#else
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#define DPRINTF(...)
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#endif
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#ifdef DEBUG_DUMP_DATA
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static void dump_data(const uint8_t *data, int len) |
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{ |
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int i;
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printf("uhci: data: ");
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for(i = 0; i < len; i++) |
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printf(" %02x", data[i]);
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printf("\n");
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} |
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#else
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static void dump_data(const uint8_t *data, int len) {} |
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#endif
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typedef struct UHCIState UHCIState; |
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/*
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* Pending async transaction.
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* 'packet' must be the first field because completion
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* handler does "(UHCIAsync *) pkt" cast.
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*/
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typedef struct UHCIAsync { |
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USBPacket packet; |
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UHCIState *uhci; |
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QTAILQ_ENTRY(UHCIAsync) next; |
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uint32_t td; |
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uint32_t token; |
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int8_t valid; |
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uint8_t isoc; |
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uint8_t done; |
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uint8_t buffer[2048];
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} UHCIAsync; |
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typedef struct UHCIPort { |
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USBPort port; |
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uint16_t ctrl; |
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} UHCIPort; |
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struct UHCIState {
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PCIDevice dev; |
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USBBus bus; |
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uint16_t cmd; /* cmd register */
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uint16_t status; |
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uint16_t intr; /* interrupt enable register */
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uint16_t frnum; /* frame number */
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uint32_t fl_base_addr; /* frame list base address */
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uint8_t sof_timing; |
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uint8_t status2; /* bit 0 and 1 are used to generate UHCI_STS_USBINT */
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int64_t expire_time; |
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QEMUTimer *frame_timer; |
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UHCIPort ports[NB_PORTS]; |
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/* Interrupts that should be raised at the end of the current frame. */
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uint32_t pending_int_mask; |
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/* Active packets */
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QTAILQ_HEAD(,UHCIAsync) async_pending; |
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uint8_t num_ports_vmstate; |
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}; |
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typedef struct UHCI_TD { |
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uint32_t link; |
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uint32_t ctrl; /* see TD_CTRL_xxx */
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uint32_t token; |
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uint32_t buffer; |
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} UHCI_TD; |
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typedef struct UHCI_QH { |
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uint32_t link; |
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uint32_t el_link; |
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} UHCI_QH; |
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static UHCIAsync *uhci_async_alloc(UHCIState *s)
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{ |
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UHCIAsync *async = qemu_malloc(sizeof(UHCIAsync));
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memset(&async->packet, 0, sizeof(async->packet)); |
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async->uhci = s; |
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async->valid = 0;
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async->td = 0;
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async->token = 0;
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async->done = 0;
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async->isoc = 0;
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return async;
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} |
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static void uhci_async_free(UHCIState *s, UHCIAsync *async) |
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{ |
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qemu_free(async); |
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} |
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static void uhci_async_link(UHCIState *s, UHCIAsync *async) |
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{ |
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QTAILQ_INSERT_HEAD(&s->async_pending, async, next); |
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} |
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static void uhci_async_unlink(UHCIState *s, UHCIAsync *async) |
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{ |
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QTAILQ_REMOVE(&s->async_pending, async, next); |
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} |
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static void uhci_async_cancel(UHCIState *s, UHCIAsync *async) |
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{ |
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DPRINTF("uhci: cancel td 0x%x token 0x%x done %u\n",
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async->td, async->token, async->done); |
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if (!async->done)
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usb_cancel_packet(&async->packet); |
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uhci_async_free(s, async); |
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} |
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/*
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* Mark all outstanding async packets as invalid.
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* This is used for canceling them when TDs are removed by the HCD.
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*/
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static UHCIAsync *uhci_async_validate_begin(UHCIState *s)
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{ |
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UHCIAsync *async; |
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QTAILQ_FOREACH(async, &s->async_pending, next) { |
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async->valid--; |
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} |
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return NULL; |
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} |
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/*
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* Cancel async packets that are no longer valid
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*/
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static void uhci_async_validate_end(UHCIState *s) |
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{ |
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UHCIAsync *curr, *n; |
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QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) { |
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if (curr->valid > 0) { |
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continue;
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} |
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uhci_async_unlink(s, curr); |
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uhci_async_cancel(s, curr); |
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} |
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} |
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static void uhci_async_cancel_device(UHCIState *s, USBDevice *dev) |
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{ |
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UHCIAsync *curr, *n; |
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QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) { |
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if (curr->packet.owner != dev) {
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continue;
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} |
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uhci_async_unlink(s, curr); |
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uhci_async_cancel(s, curr); |
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} |
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} |
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static void uhci_async_cancel_all(UHCIState *s) |
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{ |
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UHCIAsync *curr, *n; |
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QTAILQ_FOREACH_SAFE(curr, &s->async_pending, next, n) { |
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uhci_async_unlink(s, curr); |
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uhci_async_cancel(s, curr); |
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} |
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} |
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static UHCIAsync *uhci_async_find_td(UHCIState *s, uint32_t addr, uint32_t token)
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{ |
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UHCIAsync *async; |
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UHCIAsync *match = NULL;
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int count = 0; |
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/*
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* We're looking for the best match here. ie both td addr and token.
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* Otherwise we return last good match. ie just token.
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* It's ok to match just token because it identifies the transaction
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* rather well, token includes: device addr, endpoint, size, etc.
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*
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* Also since we queue async transactions in reverse order by returning
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* last good match we restores the order.
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*
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* It's expected that we wont have a ton of outstanding transactions.
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* If we ever do we'd want to optimize this algorithm.
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*/
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QTAILQ_FOREACH(async, &s->async_pending, next) { |
280 |
if (async->token == token) {
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/* Good match */
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match = async; |
283 |
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if (async->td == addr) {
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/* Best match */
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break;
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} |
288 |
} |
289 |
count++; |
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} |
291 |
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if (count > 64) |
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fprintf(stderr, "uhci: warning lots of async transactions\n");
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return match;
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} |
297 |
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static void uhci_update_irq(UHCIState *s) |
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{ |
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int level;
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if (((s->status2 & 1) && (s->intr & (1 << 2))) || |
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((s->status2 & 2) && (s->intr & (1 << 3))) || |
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((s->status & UHCI_STS_USBERR) && (s->intr & (1 << 0))) || |
304 |
((s->status & UHCI_STS_RD) && (s->intr & (1 << 1))) || |
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(s->status & UHCI_STS_HSERR) || |
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(s->status & UHCI_STS_HCPERR)) { |
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level = 1;
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} else {
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level = 0;
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} |
311 |
qemu_set_irq(s->dev.irq[3], level);
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} |
313 |
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static void uhci_reset(void *opaque) |
315 |
{ |
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UHCIState *s = opaque; |
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uint8_t *pci_conf; |
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int i;
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UHCIPort *port; |
320 |
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DPRINTF("uhci: full reset\n");
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322 |
|
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pci_conf = s->dev.config; |
324 |
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pci_conf[0x6a] = 0x01; /* usb clock */ |
326 |
pci_conf[0x6b] = 0x00; |
327 |
s->cmd = 0;
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328 |
s->status = 0;
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s->status2 = 0;
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330 |
s->intr = 0;
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s->fl_base_addr = 0;
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s->sof_timing = 64;
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|
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for(i = 0; i < NB_PORTS; i++) { |
335 |
port = &s->ports[i]; |
336 |
port->ctrl = 0x0080;
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if (port->port.dev) {
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338 |
usb_attach(&port->port, port->port.dev); |
339 |
} |
340 |
} |
341 |
|
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uhci_async_cancel_all(s); |
343 |
} |
344 |
|
345 |
static void uhci_pre_save(void *opaque) |
346 |
{ |
347 |
UHCIState *s = opaque; |
348 |
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uhci_async_cancel_all(s); |
350 |
} |
351 |
|
352 |
static const VMStateDescription vmstate_uhci_port = { |
353 |
.name = "uhci port",
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354 |
.version_id = 1,
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355 |
.minimum_version_id = 1,
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356 |
.minimum_version_id_old = 1,
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357 |
.fields = (VMStateField []) { |
358 |
VMSTATE_UINT16(ctrl, UHCIPort), |
359 |
VMSTATE_END_OF_LIST() |
360 |
} |
361 |
}; |
362 |
|
363 |
static const VMStateDescription vmstate_uhci = { |
364 |
.name = "uhci",
|
365 |
.version_id = 2,
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366 |
.minimum_version_id = 1,
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367 |
.minimum_version_id_old = 1,
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368 |
.pre_save = uhci_pre_save, |
369 |
.fields = (VMStateField []) { |
370 |
VMSTATE_PCI_DEVICE(dev, UHCIState), |
371 |
VMSTATE_UINT8_EQUAL(num_ports_vmstate, UHCIState), |
372 |
VMSTATE_STRUCT_ARRAY(ports, UHCIState, NB_PORTS, 1,
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373 |
vmstate_uhci_port, UHCIPort), |
374 |
VMSTATE_UINT16(cmd, UHCIState), |
375 |
VMSTATE_UINT16(status, UHCIState), |
376 |
VMSTATE_UINT16(intr, UHCIState), |
377 |
VMSTATE_UINT16(frnum, UHCIState), |
378 |
VMSTATE_UINT32(fl_base_addr, UHCIState), |
379 |
VMSTATE_UINT8(sof_timing, UHCIState), |
380 |
VMSTATE_UINT8(status2, UHCIState), |
381 |
VMSTATE_TIMER(frame_timer, UHCIState), |
382 |
VMSTATE_INT64_V(expire_time, UHCIState, 2),
|
383 |
VMSTATE_END_OF_LIST() |
384 |
} |
385 |
}; |
386 |
|
387 |
static void uhci_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
388 |
{ |
389 |
UHCIState *s = opaque; |
390 |
|
391 |
addr &= 0x1f;
|
392 |
switch(addr) {
|
393 |
case 0x0c: |
394 |
s->sof_timing = val; |
395 |
break;
|
396 |
} |
397 |
} |
398 |
|
399 |
static uint32_t uhci_ioport_readb(void *opaque, uint32_t addr) |
400 |
{ |
401 |
UHCIState *s = opaque; |
402 |
uint32_t val; |
403 |
|
404 |
addr &= 0x1f;
|
405 |
switch(addr) {
|
406 |
case 0x0c: |
407 |
val = s->sof_timing; |
408 |
break;
|
409 |
default:
|
410 |
val = 0xff;
|
411 |
break;
|
412 |
} |
413 |
return val;
|
414 |
} |
415 |
|
416 |
static void uhci_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
417 |
{ |
418 |
UHCIState *s = opaque; |
419 |
|
420 |
addr &= 0x1f;
|
421 |
DPRINTF("uhci: writew port=0x%04x val=0x%04x\n", addr, val);
|
422 |
|
423 |
switch(addr) {
|
424 |
case 0x00: |
425 |
if ((val & UHCI_CMD_RS) && !(s->cmd & UHCI_CMD_RS)) {
|
426 |
/* start frame processing */
|
427 |
s->expire_time = qemu_get_clock_ns(vm_clock) + |
428 |
(get_ticks_per_sec() / FRAME_TIMER_FREQ); |
429 |
qemu_mod_timer(s->frame_timer, qemu_get_clock_ns(vm_clock)); |
430 |
s->status &= ~UHCI_STS_HCHALTED; |
431 |
} else if (!(val & UHCI_CMD_RS)) { |
432 |
s->status |= UHCI_STS_HCHALTED; |
433 |
} |
434 |
if (val & UHCI_CMD_GRESET) {
|
435 |
UHCIPort *port; |
436 |
USBDevice *dev; |
437 |
int i;
|
438 |
|
439 |
/* send reset on the USB bus */
|
440 |
for(i = 0; i < NB_PORTS; i++) { |
441 |
port = &s->ports[i]; |
442 |
dev = port->port.dev; |
443 |
if (dev) {
|
444 |
usb_send_msg(dev, USB_MSG_RESET); |
445 |
} |
446 |
} |
447 |
uhci_reset(s); |
448 |
return;
|
449 |
} |
450 |
if (val & UHCI_CMD_HCRESET) {
|
451 |
uhci_reset(s); |
452 |
return;
|
453 |
} |
454 |
s->cmd = val; |
455 |
break;
|
456 |
case 0x02: |
457 |
s->status &= ~val; |
458 |
/* XXX: the chip spec is not coherent, so we add a hidden
|
459 |
register to distinguish between IOC and SPD */
|
460 |
if (val & UHCI_STS_USBINT)
|
461 |
s->status2 = 0;
|
462 |
uhci_update_irq(s); |
463 |
break;
|
464 |
case 0x04: |
465 |
s->intr = val; |
466 |
uhci_update_irq(s); |
467 |
break;
|
468 |
case 0x06: |
469 |
if (s->status & UHCI_STS_HCHALTED)
|
470 |
s->frnum = val & 0x7ff;
|
471 |
break;
|
472 |
case 0x10 ... 0x1f: |
473 |
{ |
474 |
UHCIPort *port; |
475 |
USBDevice *dev; |
476 |
int n;
|
477 |
|
478 |
n = (addr >> 1) & 7; |
479 |
if (n >= NB_PORTS)
|
480 |
return;
|
481 |
port = &s->ports[n]; |
482 |
dev = port->port.dev; |
483 |
if (dev) {
|
484 |
/* port reset */
|
485 |
if ( (val & UHCI_PORT_RESET) &&
|
486 |
!(port->ctrl & UHCI_PORT_RESET) ) { |
487 |
usb_send_msg(dev, USB_MSG_RESET); |
488 |
} |
489 |
} |
490 |
port->ctrl &= UHCI_PORT_READ_ONLY; |
491 |
port->ctrl |= (val & ~UHCI_PORT_READ_ONLY); |
492 |
/* some bits are reset when a '1' is written to them */
|
493 |
port->ctrl &= ~(val & UHCI_PORT_WRITE_CLEAR); |
494 |
} |
495 |
break;
|
496 |
} |
497 |
} |
498 |
|
499 |
static uint32_t uhci_ioport_readw(void *opaque, uint32_t addr) |
500 |
{ |
501 |
UHCIState *s = opaque; |
502 |
uint32_t val; |
503 |
|
504 |
addr &= 0x1f;
|
505 |
switch(addr) {
|
506 |
case 0x00: |
507 |
val = s->cmd; |
508 |
break;
|
509 |
case 0x02: |
510 |
val = s->status; |
511 |
break;
|
512 |
case 0x04: |
513 |
val = s->intr; |
514 |
break;
|
515 |
case 0x06: |
516 |
val = s->frnum; |
517 |
break;
|
518 |
case 0x10 ... 0x1f: |
519 |
{ |
520 |
UHCIPort *port; |
521 |
int n;
|
522 |
n = (addr >> 1) & 7; |
523 |
if (n >= NB_PORTS)
|
524 |
goto read_default;
|
525 |
port = &s->ports[n]; |
526 |
val = port->ctrl; |
527 |
} |
528 |
break;
|
529 |
default:
|
530 |
read_default:
|
531 |
val = 0xff7f; /* disabled port */ |
532 |
break;
|
533 |
} |
534 |
|
535 |
DPRINTF("uhci: readw port=0x%04x val=0x%04x\n", addr, val);
|
536 |
|
537 |
return val;
|
538 |
} |
539 |
|
540 |
static void uhci_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
541 |
{ |
542 |
UHCIState *s = opaque; |
543 |
|
544 |
addr &= 0x1f;
|
545 |
DPRINTF("uhci: writel port=0x%04x val=0x%08x\n", addr, val);
|
546 |
|
547 |
switch(addr) {
|
548 |
case 0x08: |
549 |
s->fl_base_addr = val & ~0xfff;
|
550 |
break;
|
551 |
} |
552 |
} |
553 |
|
554 |
static uint32_t uhci_ioport_readl(void *opaque, uint32_t addr) |
555 |
{ |
556 |
UHCIState *s = opaque; |
557 |
uint32_t val; |
558 |
|
559 |
addr &= 0x1f;
|
560 |
switch(addr) {
|
561 |
case 0x08: |
562 |
val = s->fl_base_addr; |
563 |
break;
|
564 |
default:
|
565 |
val = 0xffffffff;
|
566 |
break;
|
567 |
} |
568 |
return val;
|
569 |
} |
570 |
|
571 |
/* signal resume if controller suspended */
|
572 |
static void uhci_resume (void *opaque) |
573 |
{ |
574 |
UHCIState *s = (UHCIState *)opaque; |
575 |
|
576 |
if (!s)
|
577 |
return;
|
578 |
|
579 |
if (s->cmd & UHCI_CMD_EGSM) {
|
580 |
s->cmd |= UHCI_CMD_FGR; |
581 |
s->status |= UHCI_STS_RD; |
582 |
uhci_update_irq(s); |
583 |
} |
584 |
} |
585 |
|
586 |
static void uhci_attach(USBPort *port1) |
587 |
{ |
588 |
UHCIState *s = port1->opaque; |
589 |
UHCIPort *port = &s->ports[port1->index]; |
590 |
|
591 |
/* set connect status */
|
592 |
port->ctrl |= UHCI_PORT_CCS | UHCI_PORT_CSC; |
593 |
|
594 |
/* update speed */
|
595 |
if (port->port.dev->speed == USB_SPEED_LOW) {
|
596 |
port->ctrl |= UHCI_PORT_LSDA; |
597 |
} else {
|
598 |
port->ctrl &= ~UHCI_PORT_LSDA; |
599 |
} |
600 |
|
601 |
uhci_resume(s); |
602 |
} |
603 |
|
604 |
static void uhci_detach(USBPort *port1) |
605 |
{ |
606 |
UHCIState *s = port1->opaque; |
607 |
UHCIPort *port = &s->ports[port1->index]; |
608 |
|
609 |
uhci_async_cancel_device(s, port1->dev); |
610 |
|
611 |
/* set connect status */
|
612 |
if (port->ctrl & UHCI_PORT_CCS) {
|
613 |
port->ctrl &= ~UHCI_PORT_CCS; |
614 |
port->ctrl |= UHCI_PORT_CSC; |
615 |
} |
616 |
/* disable port */
|
617 |
if (port->ctrl & UHCI_PORT_EN) {
|
618 |
port->ctrl &= ~UHCI_PORT_EN; |
619 |
port->ctrl |= UHCI_PORT_ENC; |
620 |
} |
621 |
|
622 |
uhci_resume(s); |
623 |
} |
624 |
|
625 |
static void uhci_child_detach(USBPort *port1, USBDevice *child) |
626 |
{ |
627 |
UHCIState *s = port1->opaque; |
628 |
|
629 |
uhci_async_cancel_device(s, child); |
630 |
} |
631 |
|
632 |
static void uhci_wakeup(USBPort *port1) |
633 |
{ |
634 |
UHCIState *s = port1->opaque; |
635 |
UHCIPort *port = &s->ports[port1->index]; |
636 |
|
637 |
if (port->ctrl & UHCI_PORT_SUSPEND && !(port->ctrl & UHCI_PORT_RD)) {
|
638 |
port->ctrl |= UHCI_PORT_RD; |
639 |
uhci_resume(s); |
640 |
} |
641 |
} |
642 |
|
643 |
static int uhci_broadcast_packet(UHCIState *s, USBPacket *p) |
644 |
{ |
645 |
int i, ret;
|
646 |
|
647 |
DPRINTF("uhci: packet enter. pid %s addr 0x%02x ep %d len %d\n",
|
648 |
pid2str(p->pid), p->devaddr, p->devep, p->len); |
649 |
if (p->pid == USB_TOKEN_OUT || p->pid == USB_TOKEN_SETUP)
|
650 |
dump_data(p->data, p->len); |
651 |
|
652 |
ret = USB_RET_NODEV; |
653 |
for (i = 0; i < NB_PORTS && ret == USB_RET_NODEV; i++) { |
654 |
UHCIPort *port = &s->ports[i]; |
655 |
USBDevice *dev = port->port.dev; |
656 |
|
657 |
if (dev && (port->ctrl & UHCI_PORT_EN))
|
658 |
ret = usb_handle_packet(dev, p); |
659 |
} |
660 |
|
661 |
DPRINTF("uhci: packet exit. ret %d len %d\n", ret, p->len);
|
662 |
if (p->pid == USB_TOKEN_IN && ret > 0) |
663 |
dump_data(p->data, ret); |
664 |
|
665 |
return ret;
|
666 |
} |
667 |
|
668 |
static void uhci_async_complete(USBPort *port, USBPacket *packet); |
669 |
static void uhci_process_frame(UHCIState *s); |
670 |
|
671 |
/* return -1 if fatal error (frame must be stopped)
|
672 |
0 if TD successful
|
673 |
1 if TD unsuccessful or inactive
|
674 |
*/
|
675 |
static int uhci_complete_td(UHCIState *s, UHCI_TD *td, UHCIAsync *async, uint32_t *int_mask) |
676 |
{ |
677 |
int len = 0, max_len, err, ret; |
678 |
uint8_t pid; |
679 |
|
680 |
max_len = ((td->token >> 21) + 1) & 0x7ff; |
681 |
pid = td->token & 0xff;
|
682 |
|
683 |
ret = async->packet.len; |
684 |
|
685 |
if (td->ctrl & TD_CTRL_IOS)
|
686 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
687 |
|
688 |
if (ret < 0) |
689 |
goto out;
|
690 |
|
691 |
len = async->packet.len; |
692 |
td->ctrl = (td->ctrl & ~0x7ff) | ((len - 1) & 0x7ff); |
693 |
|
694 |
/* The NAK bit may have been set by a previous frame, so clear it
|
695 |
here. The docs are somewhat unclear, but win2k relies on this
|
696 |
behavior. */
|
697 |
td->ctrl &= ~(TD_CTRL_ACTIVE | TD_CTRL_NAK); |
698 |
if (td->ctrl & TD_CTRL_IOC)
|
699 |
*int_mask |= 0x01;
|
700 |
|
701 |
if (pid == USB_TOKEN_IN) {
|
702 |
if (len > max_len) {
|
703 |
ret = USB_RET_BABBLE; |
704 |
goto out;
|
705 |
} |
706 |
|
707 |
if (len > 0) { |
708 |
/* write the data back */
|
709 |
cpu_physical_memory_write(td->buffer, async->buffer, len); |
710 |
} |
711 |
|
712 |
if ((td->ctrl & TD_CTRL_SPD) && len < max_len) {
|
713 |
*int_mask |= 0x02;
|
714 |
/* short packet: do not update QH */
|
715 |
DPRINTF("uhci: short packet. td 0x%x token 0x%x\n", async->td, async->token);
|
716 |
return 1; |
717 |
} |
718 |
} |
719 |
|
720 |
/* success */
|
721 |
return 0; |
722 |
|
723 |
out:
|
724 |
switch(ret) {
|
725 |
case USB_RET_STALL:
|
726 |
td->ctrl |= TD_CTRL_STALL; |
727 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
728 |
s->status |= UHCI_STS_USBERR; |
729 |
uhci_update_irq(s); |
730 |
return 1; |
731 |
|
732 |
case USB_RET_BABBLE:
|
733 |
td->ctrl |= TD_CTRL_BABBLE | TD_CTRL_STALL; |
734 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
735 |
s->status |= UHCI_STS_USBERR; |
736 |
uhci_update_irq(s); |
737 |
/* frame interrupted */
|
738 |
return -1; |
739 |
|
740 |
case USB_RET_NAK:
|
741 |
td->ctrl |= TD_CTRL_NAK; |
742 |
if (pid == USB_TOKEN_SETUP)
|
743 |
break;
|
744 |
return 1; |
745 |
|
746 |
case USB_RET_NODEV:
|
747 |
default:
|
748 |
break;
|
749 |
} |
750 |
|
751 |
/* Retry the TD if error count is not zero */
|
752 |
|
753 |
td->ctrl |= TD_CTRL_TIMEOUT; |
754 |
err = (td->ctrl >> TD_CTRL_ERROR_SHIFT) & 3;
|
755 |
if (err != 0) { |
756 |
err--; |
757 |
if (err == 0) { |
758 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
759 |
s->status |= UHCI_STS_USBERR; |
760 |
if (td->ctrl & TD_CTRL_IOC)
|
761 |
*int_mask |= 0x01;
|
762 |
uhci_update_irq(s); |
763 |
} |
764 |
} |
765 |
td->ctrl = (td->ctrl & ~(3 << TD_CTRL_ERROR_SHIFT)) |
|
766 |
(err << TD_CTRL_ERROR_SHIFT); |
767 |
return 1; |
768 |
} |
769 |
|
770 |
static int uhci_handle_td(UHCIState *s, uint32_t addr, UHCI_TD *td, uint32_t *int_mask) |
771 |
{ |
772 |
UHCIAsync *async; |
773 |
int len = 0, max_len; |
774 |
uint8_t pid, isoc; |
775 |
uint32_t token; |
776 |
|
777 |
/* Is active ? */
|
778 |
if (!(td->ctrl & TD_CTRL_ACTIVE))
|
779 |
return 1; |
780 |
|
781 |
/* token field is not unique for isochronous requests,
|
782 |
* so use the destination buffer
|
783 |
*/
|
784 |
if (td->ctrl & TD_CTRL_IOS) {
|
785 |
token = td->buffer; |
786 |
isoc = 1;
|
787 |
} else {
|
788 |
token = td->token; |
789 |
isoc = 0;
|
790 |
} |
791 |
|
792 |
async = uhci_async_find_td(s, addr, token); |
793 |
if (async) {
|
794 |
/* Already submitted */
|
795 |
async->valid = 32;
|
796 |
|
797 |
if (!async->done)
|
798 |
return 1; |
799 |
|
800 |
uhci_async_unlink(s, async); |
801 |
goto done;
|
802 |
} |
803 |
|
804 |
/* Allocate new packet */
|
805 |
async = uhci_async_alloc(s); |
806 |
if (!async)
|
807 |
return 1; |
808 |
|
809 |
/* valid needs to be large enough to handle 10 frame delay
|
810 |
* for initial isochronous requests
|
811 |
*/
|
812 |
async->valid = 32;
|
813 |
async->td = addr; |
814 |
async->token = token; |
815 |
async->isoc = isoc; |
816 |
|
817 |
max_len = ((td->token >> 21) + 1) & 0x7ff; |
818 |
pid = td->token & 0xff;
|
819 |
|
820 |
async->packet.pid = pid; |
821 |
async->packet.devaddr = (td->token >> 8) & 0x7f; |
822 |
async->packet.devep = (td->token >> 15) & 0xf; |
823 |
async->packet.data = async->buffer; |
824 |
async->packet.len = max_len; |
825 |
|
826 |
switch(pid) {
|
827 |
case USB_TOKEN_OUT:
|
828 |
case USB_TOKEN_SETUP:
|
829 |
cpu_physical_memory_read(td->buffer, async->buffer, max_len); |
830 |
len = uhci_broadcast_packet(s, &async->packet); |
831 |
if (len >= 0) |
832 |
len = max_len; |
833 |
break;
|
834 |
|
835 |
case USB_TOKEN_IN:
|
836 |
len = uhci_broadcast_packet(s, &async->packet); |
837 |
break;
|
838 |
|
839 |
default:
|
840 |
/* invalid pid : frame interrupted */
|
841 |
uhci_async_free(s, async); |
842 |
s->status |= UHCI_STS_HCPERR; |
843 |
uhci_update_irq(s); |
844 |
return -1; |
845 |
} |
846 |
|
847 |
if (len == USB_RET_ASYNC) {
|
848 |
uhci_async_link(s, async); |
849 |
return 2; |
850 |
} |
851 |
|
852 |
async->packet.len = len; |
853 |
|
854 |
done:
|
855 |
len = uhci_complete_td(s, td, async, int_mask); |
856 |
uhci_async_free(s, async); |
857 |
return len;
|
858 |
} |
859 |
|
860 |
static void uhci_async_complete(USBPort *port, USBPacket *packet) |
861 |
{ |
862 |
UHCIAsync *async = container_of(packet, UHCIAsync, packet); |
863 |
UHCIState *s = async->uhci; |
864 |
|
865 |
DPRINTF("uhci: async complete. td 0x%x token 0x%x\n", async->td, async->token);
|
866 |
|
867 |
if (async->isoc) {
|
868 |
UHCI_TD td; |
869 |
uint32_t link = async->td; |
870 |
uint32_t int_mask = 0, val;
|
871 |
|
872 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *) &td, sizeof(td)); |
873 |
le32_to_cpus(&td.link); |
874 |
le32_to_cpus(&td.ctrl); |
875 |
le32_to_cpus(&td.token); |
876 |
le32_to_cpus(&td.buffer); |
877 |
|
878 |
uhci_async_unlink(s, async); |
879 |
uhci_complete_td(s, &td, async, &int_mask); |
880 |
s->pending_int_mask |= int_mask; |
881 |
|
882 |
/* update the status bits of the TD */
|
883 |
val = cpu_to_le32(td.ctrl); |
884 |
cpu_physical_memory_write((link & ~0xf) + 4, |
885 |
(const uint8_t *)&val, sizeof(val)); |
886 |
uhci_async_free(s, async); |
887 |
} else {
|
888 |
async->done = 1;
|
889 |
uhci_process_frame(s); |
890 |
} |
891 |
} |
892 |
|
893 |
static int is_valid(uint32_t link) |
894 |
{ |
895 |
return (link & 1) == 0; |
896 |
} |
897 |
|
898 |
static int is_qh(uint32_t link) |
899 |
{ |
900 |
return (link & 2) != 0; |
901 |
} |
902 |
|
903 |
static int depth_first(uint32_t link) |
904 |
{ |
905 |
return (link & 4) != 0; |
906 |
} |
907 |
|
908 |
/* QH DB used for detecting QH loops */
|
909 |
#define UHCI_MAX_QUEUES 128 |
910 |
typedef struct { |
911 |
uint32_t addr[UHCI_MAX_QUEUES]; |
912 |
int count;
|
913 |
} QhDb; |
914 |
|
915 |
static void qhdb_reset(QhDb *db) |
916 |
{ |
917 |
db->count = 0;
|
918 |
} |
919 |
|
920 |
/* Add QH to DB. Returns 1 if already present or DB is full. */
|
921 |
static int qhdb_insert(QhDb *db, uint32_t addr) |
922 |
{ |
923 |
int i;
|
924 |
for (i = 0; i < db->count; i++) |
925 |
if (db->addr[i] == addr)
|
926 |
return 1; |
927 |
|
928 |
if (db->count >= UHCI_MAX_QUEUES)
|
929 |
return 1; |
930 |
|
931 |
db->addr[db->count++] = addr; |
932 |
return 0; |
933 |
} |
934 |
|
935 |
static void uhci_process_frame(UHCIState *s) |
936 |
{ |
937 |
uint32_t frame_addr, link, old_td_ctrl, val, int_mask; |
938 |
uint32_t curr_qh; |
939 |
int cnt, ret;
|
940 |
UHCI_TD td; |
941 |
UHCI_QH qh; |
942 |
QhDb qhdb; |
943 |
|
944 |
frame_addr = s->fl_base_addr + ((s->frnum & 0x3ff) << 2); |
945 |
|
946 |
DPRINTF("uhci: processing frame %d addr 0x%x\n" , s->frnum, frame_addr);
|
947 |
|
948 |
cpu_physical_memory_read(frame_addr, (uint8_t *)&link, 4);
|
949 |
le32_to_cpus(&link); |
950 |
|
951 |
int_mask = 0;
|
952 |
curr_qh = 0;
|
953 |
|
954 |
qhdb_reset(&qhdb); |
955 |
|
956 |
for (cnt = FRAME_MAX_LOOPS; is_valid(link) && cnt; cnt--) {
|
957 |
if (is_qh(link)) {
|
958 |
/* QH */
|
959 |
|
960 |
if (qhdb_insert(&qhdb, link)) {
|
961 |
/*
|
962 |
* We're going in circles. Which is not a bug because
|
963 |
* HCD is allowed to do that as part of the BW management.
|
964 |
* In our case though it makes no sense to spin here. Sync transations
|
965 |
* are already done, and async completion handler will re-process
|
966 |
* the frame when something is ready.
|
967 |
*/
|
968 |
DPRINTF("uhci: detected loop. qh 0x%x\n", link);
|
969 |
break;
|
970 |
} |
971 |
|
972 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *) &qh, sizeof(qh)); |
973 |
le32_to_cpus(&qh.link); |
974 |
le32_to_cpus(&qh.el_link); |
975 |
|
976 |
DPRINTF("uhci: QH 0x%x load. link 0x%x elink 0x%x\n",
|
977 |
link, qh.link, qh.el_link); |
978 |
|
979 |
if (!is_valid(qh.el_link)) {
|
980 |
/* QH w/o elements */
|
981 |
curr_qh = 0;
|
982 |
link = qh.link; |
983 |
} else {
|
984 |
/* QH with elements */
|
985 |
curr_qh = link; |
986 |
link = qh.el_link; |
987 |
} |
988 |
continue;
|
989 |
} |
990 |
|
991 |
/* TD */
|
992 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *) &td, sizeof(td)); |
993 |
le32_to_cpus(&td.link); |
994 |
le32_to_cpus(&td.ctrl); |
995 |
le32_to_cpus(&td.token); |
996 |
le32_to_cpus(&td.buffer); |
997 |
|
998 |
DPRINTF("uhci: TD 0x%x load. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
|
999 |
link, td.link, td.ctrl, td.token, curr_qh); |
1000 |
|
1001 |
old_td_ctrl = td.ctrl; |
1002 |
ret = uhci_handle_td(s, link, &td, &int_mask); |
1003 |
if (old_td_ctrl != td.ctrl) {
|
1004 |
/* update the status bits of the TD */
|
1005 |
val = cpu_to_le32(td.ctrl); |
1006 |
cpu_physical_memory_write((link & ~0xf) + 4, |
1007 |
(const uint8_t *)&val, sizeof(val)); |
1008 |
} |
1009 |
|
1010 |
if (ret < 0) { |
1011 |
/* interrupted frame */
|
1012 |
break;
|
1013 |
} |
1014 |
|
1015 |
if (ret == 2 || ret == 1) { |
1016 |
DPRINTF("uhci: TD 0x%x %s. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
|
1017 |
link, ret == 2 ? "pend" : "skip", |
1018 |
td.link, td.ctrl, td.token, curr_qh); |
1019 |
|
1020 |
link = curr_qh ? qh.link : td.link; |
1021 |
continue;
|
1022 |
} |
1023 |
|
1024 |
/* completed TD */
|
1025 |
|
1026 |
DPRINTF("uhci: TD 0x%x done. link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
|
1027 |
link, td.link, td.ctrl, td.token, curr_qh); |
1028 |
|
1029 |
link = td.link; |
1030 |
|
1031 |
if (curr_qh) {
|
1032 |
/* update QH element link */
|
1033 |
qh.el_link = link; |
1034 |
val = cpu_to_le32(qh.el_link); |
1035 |
cpu_physical_memory_write((curr_qh & ~0xf) + 4, |
1036 |
(const uint8_t *)&val, sizeof(val)); |
1037 |
|
1038 |
if (!depth_first(link)) {
|
1039 |
/* done with this QH */
|
1040 |
|
1041 |
DPRINTF("uhci: QH 0x%x done. link 0x%x elink 0x%x\n",
|
1042 |
curr_qh, qh.link, qh.el_link); |
1043 |
|
1044 |
curr_qh = 0;
|
1045 |
link = qh.link; |
1046 |
} |
1047 |
} |
1048 |
|
1049 |
/* go to the next entry */
|
1050 |
} |
1051 |
|
1052 |
s->pending_int_mask |= int_mask; |
1053 |
} |
1054 |
|
1055 |
static void uhci_frame_timer(void *opaque) |
1056 |
{ |
1057 |
UHCIState *s = opaque; |
1058 |
|
1059 |
/* prepare the timer for the next frame */
|
1060 |
s->expire_time += (get_ticks_per_sec() / FRAME_TIMER_FREQ); |
1061 |
|
1062 |
if (!(s->cmd & UHCI_CMD_RS)) {
|
1063 |
/* Full stop */
|
1064 |
qemu_del_timer(s->frame_timer); |
1065 |
/* set hchalted bit in status - UHCI11D 2.1.2 */
|
1066 |
s->status |= UHCI_STS_HCHALTED; |
1067 |
|
1068 |
DPRINTF("uhci: halted\n");
|
1069 |
return;
|
1070 |
} |
1071 |
|
1072 |
/* Complete the previous frame */
|
1073 |
if (s->pending_int_mask) {
|
1074 |
s->status2 |= s->pending_int_mask; |
1075 |
s->status |= UHCI_STS_USBINT; |
1076 |
uhci_update_irq(s); |
1077 |
} |
1078 |
s->pending_int_mask = 0;
|
1079 |
|
1080 |
/* Start new frame */
|
1081 |
s->frnum = (s->frnum + 1) & 0x7ff; |
1082 |
|
1083 |
DPRINTF("uhci: new frame #%u\n" , s->frnum);
|
1084 |
|
1085 |
uhci_async_validate_begin(s); |
1086 |
|
1087 |
uhci_process_frame(s); |
1088 |
|
1089 |
uhci_async_validate_end(s); |
1090 |
|
1091 |
qemu_mod_timer(s->frame_timer, s->expire_time); |
1092 |
} |
1093 |
|
1094 |
static void uhci_map(PCIDevice *pci_dev, int region_num, |
1095 |
pcibus_t addr, pcibus_t size, int type)
|
1096 |
{ |
1097 |
UHCIState *s = (UHCIState *)pci_dev; |
1098 |
|
1099 |
register_ioport_write(addr, 32, 2, uhci_ioport_writew, s); |
1100 |
register_ioport_read(addr, 32, 2, uhci_ioport_readw, s); |
1101 |
register_ioport_write(addr, 32, 4, uhci_ioport_writel, s); |
1102 |
register_ioport_read(addr, 32, 4, uhci_ioport_readl, s); |
1103 |
register_ioport_write(addr, 32, 1, uhci_ioport_writeb, s); |
1104 |
register_ioport_read(addr, 32, 1, uhci_ioport_readb, s); |
1105 |
} |
1106 |
|
1107 |
static USBPortOps uhci_port_ops = {
|
1108 |
.attach = uhci_attach, |
1109 |
.detach = uhci_detach, |
1110 |
.child_detach = uhci_child_detach, |
1111 |
.wakeup = uhci_wakeup, |
1112 |
.complete = uhci_async_complete, |
1113 |
}; |
1114 |
|
1115 |
static USBBusOps uhci_bus_ops = {
|
1116 |
}; |
1117 |
|
1118 |
static int usb_uhci_common_initfn(PCIDevice *dev) |
1119 |
{ |
1120 |
UHCIState *s = DO_UPCAST(UHCIState, dev, dev); |
1121 |
uint8_t *pci_conf = s->dev.config; |
1122 |
int i;
|
1123 |
|
1124 |
pci_conf[PCI_CLASS_PROG] = 0x00;
|
1125 |
/* TODO: reset value should be 0. */
|
1126 |
pci_conf[PCI_INTERRUPT_PIN] = 4; // interrupt pin 3 |
1127 |
pci_conf[USB_SBRN] = USB_RELEASE_1; // release number
|
1128 |
|
1129 |
usb_bus_new(&s->bus, &uhci_bus_ops, &s->dev.qdev); |
1130 |
for(i = 0; i < NB_PORTS; i++) { |
1131 |
usb_register_port(&s->bus, &s->ports[i].port, s, i, &uhci_port_ops, |
1132 |
USB_SPEED_MASK_LOW | USB_SPEED_MASK_FULL); |
1133 |
} |
1134 |
s->frame_timer = qemu_new_timer_ns(vm_clock, uhci_frame_timer, s); |
1135 |
s->num_ports_vmstate = NB_PORTS; |
1136 |
QTAILQ_INIT(&s->async_pending); |
1137 |
|
1138 |
qemu_register_reset(uhci_reset, s); |
1139 |
|
1140 |
/* Use region 4 for consistency with real hardware. BSD guests seem
|
1141 |
to rely on this. */
|
1142 |
pci_register_bar(&s->dev, 4, 0x20, |
1143 |
PCI_BASE_ADDRESS_SPACE_IO, uhci_map); |
1144 |
|
1145 |
return 0; |
1146 |
} |
1147 |
|
1148 |
static int usb_uhci_vt82c686b_initfn(PCIDevice *dev) |
1149 |
{ |
1150 |
UHCIState *s = DO_UPCAST(UHCIState, dev, dev); |
1151 |
uint8_t *pci_conf = s->dev.config; |
1152 |
|
1153 |
/* USB misc control 1/2 */
|
1154 |
pci_set_long(pci_conf + 0x40,0x00001000); |
1155 |
/* PM capability */
|
1156 |
pci_set_long(pci_conf + 0x80,0x00020001); |
1157 |
/* USB legacy support */
|
1158 |
pci_set_long(pci_conf + 0xc0,0x00002000); |
1159 |
|
1160 |
return usb_uhci_common_initfn(dev);
|
1161 |
} |
1162 |
|
1163 |
static PCIDeviceInfo uhci_info[] = {
|
1164 |
{ |
1165 |
.qdev.name = "piix3-usb-uhci",
|
1166 |
.qdev.size = sizeof(UHCIState),
|
1167 |
.qdev.vmsd = &vmstate_uhci, |
1168 |
.init = usb_uhci_common_initfn, |
1169 |
.vendor_id = PCI_VENDOR_ID_INTEL, |
1170 |
.device_id = PCI_DEVICE_ID_INTEL_82371SB_2, |
1171 |
.revision = 0x01,
|
1172 |
.class_id = PCI_CLASS_SERIAL_USB, |
1173 |
},{ |
1174 |
.qdev.name = "piix4-usb-uhci",
|
1175 |
.qdev.size = sizeof(UHCIState),
|
1176 |
.qdev.vmsd = &vmstate_uhci, |
1177 |
.init = usb_uhci_common_initfn, |
1178 |
.vendor_id = PCI_VENDOR_ID_INTEL, |
1179 |
.device_id = PCI_DEVICE_ID_INTEL_82371AB_2, |
1180 |
.revision = 0x01,
|
1181 |
.class_id = PCI_CLASS_SERIAL_USB, |
1182 |
},{ |
1183 |
.qdev.name = "vt82c686b-usb-uhci",
|
1184 |
.qdev.size = sizeof(UHCIState),
|
1185 |
.qdev.vmsd = &vmstate_uhci, |
1186 |
.init = usb_uhci_vt82c686b_initfn, |
1187 |
.vendor_id = PCI_VENDOR_ID_VIA, |
1188 |
.device_id = PCI_DEVICE_ID_VIA_UHCI, |
1189 |
.revision = 0x01,
|
1190 |
.class_id = PCI_CLASS_SERIAL_USB, |
1191 |
},{ |
1192 |
/* end of list */
|
1193 |
} |
1194 |
}; |
1195 |
|
1196 |
static void uhci_register(void) |
1197 |
{ |
1198 |
pci_qdev_register_many(uhci_info); |
1199 |
} |
1200 |
device_init(uhci_register); |
1201 |
|
1202 |
void usb_uhci_piix3_init(PCIBus *bus, int devfn) |
1203 |
{ |
1204 |
pci_create_simple(bus, devfn, "piix3-usb-uhci");
|
1205 |
} |
1206 |
|
1207 |
void usb_uhci_piix4_init(PCIBus *bus, int devfn) |
1208 |
{ |
1209 |
pci_create_simple(bus, devfn, "piix4-usb-uhci");
|
1210 |
} |
1211 |
|
1212 |
void usb_uhci_vt82c686b_init(PCIBus *bus, int devfn) |
1213 |
{ |
1214 |
pci_create_simple(bus, devfn, "vt82c686b-usb-uhci");
|
1215 |
} |