root / hw / usb-uhci.c @ 4d611c9a
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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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* 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 "vl.h" |
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//#define DEBUG
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//#define DEBUG_PACKET
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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) |
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|
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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_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 FRAME_TIMER_FREQ 1000 |
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|
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#define FRAME_MAX_LOOPS 100 |
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|
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#define NB_PORTS 2 |
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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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|
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typedef struct UHCIState { |
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PCIDevice dev; |
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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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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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/* For simplicity of implementation we only allow a single pending USB
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request. This means all usb traffic on this controller is effectively
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suspended until that transfer completes. When the transfer completes
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the next transfer from that queue will be processed. However
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other queues will not be processed until the next frame. The solution
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is to allow multiple pending requests. */
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uint32_t async_qh; |
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USBPacket usb_packet; |
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uint8_t usb_buf[1280];
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} UHCIState; |
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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 void uhci_attach(USBPort *port1, USBDevice *dev); |
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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))) || |
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((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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} |
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pci_set_irq(&s->dev, 3, level);
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} |
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static void uhci_reset(UHCIState *s) |
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{
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uint8_t *pci_conf; |
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int i;
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UHCIPort *port; |
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pci_conf = s->dev.config; |
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pci_conf[0x6a] = 0x01; /* usb clock */ |
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pci_conf[0x6b] = 0x00; |
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s->cmd = 0;
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s->status = 0;
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s->status2 = 0;
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s->intr = 0;
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s->fl_base_addr = 0;
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s->sof_timing = 64;
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for(i = 0; i < NB_PORTS; i++) { |
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port = &s->ports[i]; |
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port->ctrl = 0x0080;
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if (port->port.dev)
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uhci_attach(&port->port, port->port.dev); |
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} |
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} |
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static void uhci_ioport_writeb(void *opaque, uint32_t addr, uint32_t val) |
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{
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UHCIState *s = opaque; |
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addr &= 0x1f;
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switch(addr) {
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case 0x0c: |
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s->sof_timing = val; |
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break;
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} |
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} |
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static uint32_t uhci_ioport_readb(void *opaque, uint32_t addr) |
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{
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UHCIState *s = opaque; |
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uint32_t val; |
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addr &= 0x1f;
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switch(addr) {
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case 0x0c: |
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val = s->sof_timing; |
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break;
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default:
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val = 0xff;
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break;
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} |
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return val;
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} |
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static void uhci_ioport_writew(void *opaque, uint32_t addr, uint32_t val) |
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{
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UHCIState *s = opaque; |
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addr &= 0x1f;
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#ifdef DEBUG
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printf("uhci writew port=0x%04x val=0x%04x\n", addr, val);
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#endif
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switch(addr) {
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case 0x00: |
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if ((val & UHCI_CMD_RS) && !(s->cmd & UHCI_CMD_RS)) {
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/* start frame processing */
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qemu_mod_timer(s->frame_timer, qemu_get_clock(vm_clock)); |
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s->status &= ~UHCI_STS_HCHALTED; |
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} else if (!(val & UHCI_CMD_RS)) { |
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s->status |= UHCI_STS_HCHALTED; |
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} |
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if (val & UHCI_CMD_GRESET) {
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UHCIPort *port; |
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USBDevice *dev; |
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int i;
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/* send reset on the USB bus */
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for(i = 0; i < NB_PORTS; i++) { |
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port = &s->ports[i]; |
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dev = port->port.dev; |
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if (dev) {
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usb_send_msg(dev, USB_MSG_RESET); |
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} |
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} |
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uhci_reset(s); |
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return;
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} |
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if (val & UHCI_CMD_HCRESET) {
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uhci_reset(s); |
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return;
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} |
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s->cmd = val; |
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break;
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case 0x02: |
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s->status &= ~val; |
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/* XXX: the chip spec is not coherent, so we add a hidden
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register to distinguish between IOC and SPD */
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if (val & UHCI_STS_USBINT)
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s->status2 = 0;
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uhci_update_irq(s); |
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break;
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case 0x04: |
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s->intr = val; |
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uhci_update_irq(s); |
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break;
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case 0x06: |
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if (s->status & UHCI_STS_HCHALTED)
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s->frnum = val & 0x7ff;
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break;
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case 0x10 ... 0x1f: |
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{
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UHCIPort *port; |
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USBDevice *dev; |
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int n;
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n = (addr >> 1) & 7; |
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if (n >= NB_PORTS)
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return;
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port = &s->ports[n]; |
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dev = port->port.dev; |
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if (dev) {
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/* port reset */
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if ( (val & UHCI_PORT_RESET) &&
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!(port->ctrl & UHCI_PORT_RESET) ) {
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usb_send_msg(dev, USB_MSG_RESET); |
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} |
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} |
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port->ctrl = (port->ctrl & 0x01fb) | (val & ~0x01fb); |
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/* some bits are reset when a '1' is written to them */
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port->ctrl &= ~(val & 0x000a);
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} |
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break;
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} |
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} |
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|
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static uint32_t uhci_ioport_readw(void *opaque, uint32_t addr) |
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{
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UHCIState *s = opaque; |
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uint32_t val; |
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addr &= 0x1f;
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switch(addr) {
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case 0x00: |
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val = s->cmd; |
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break;
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case 0x02: |
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val = s->status; |
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break;
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case 0x04: |
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val = s->intr; |
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break;
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case 0x06: |
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val = s->frnum; |
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break;
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case 0x10 ... 0x1f: |
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{
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UHCIPort *port; |
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int n;
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n = (addr >> 1) & 7; |
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if (n >= NB_PORTS)
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goto read_default;
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port = &s->ports[n]; |
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val = port->ctrl; |
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} |
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break;
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default:
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read_default:
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val = 0xff7f; /* disabled port */ |
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break;
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} |
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#ifdef DEBUG
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printf("uhci readw port=0x%04x val=0x%04x\n", addr, val);
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#endif
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return val;
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} |
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|
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static void uhci_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
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{
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UHCIState *s = opaque; |
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|
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addr &= 0x1f;
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#ifdef DEBUG
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printf("uhci writel port=0x%04x val=0x%08x\n", addr, val);
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#endif
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switch(addr) {
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case 0x08: |
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s->fl_base_addr = val & ~0xfff;
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break;
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} |
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} |
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|
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static uint32_t uhci_ioport_readl(void *opaque, uint32_t addr) |
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{
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UHCIState *s = opaque; |
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uint32_t val; |
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|
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addr &= 0x1f;
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switch(addr) {
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case 0x08: |
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val = s->fl_base_addr; |
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break;
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default:
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val = 0xffffffff;
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break;
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} |
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return val;
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} |
| 329 |
|
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static void uhci_attach(USBPort *port1, USBDevice *dev) |
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{
|
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UHCIState *s = port1->opaque; |
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UHCIPort *port = &s->ports[port1->index]; |
| 334 |
|
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if (dev) {
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if (port->port.dev) {
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usb_attach(port1, NULL);
|
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} |
| 339 |
/* set connect status */
|
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port->ctrl |= UHCI_PORT_CCS | UHCI_PORT_CSC; |
| 341 |
|
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/* update speed */
|
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if (dev->speed == USB_SPEED_LOW)
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port->ctrl |= UHCI_PORT_LSDA; |
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else
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port->ctrl &= ~UHCI_PORT_LSDA; |
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port->port.dev = dev; |
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/* send the attach message */
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usb_send_msg(dev, USB_MSG_ATTACH); |
| 350 |
} else {
|
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/* set connect status */
|
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if (port->ctrl & UHCI_PORT_CCS) {
|
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port->ctrl &= ~UHCI_PORT_CCS; |
| 354 |
port->ctrl |= UHCI_PORT_CSC; |
| 355 |
} |
| 356 |
/* disable port */
|
| 357 |
if (port->ctrl & UHCI_PORT_EN) {
|
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port->ctrl &= ~UHCI_PORT_EN; |
| 359 |
port->ctrl |= UHCI_PORT_ENC; |
| 360 |
} |
| 361 |
dev = port->port.dev; |
| 362 |
if (dev) {
|
| 363 |
/* send the detach message */
|
| 364 |
usb_send_msg(dev, USB_MSG_DETACH); |
| 365 |
} |
| 366 |
port->port.dev = NULL;
|
| 367 |
} |
| 368 |
} |
| 369 |
|
| 370 |
static int uhci_broadcast_packet(UHCIState *s, USBPacket *p) |
| 371 |
{
|
| 372 |
UHCIPort *port; |
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USBDevice *dev; |
| 374 |
int i, ret;
|
| 375 |
|
| 376 |
#ifdef DEBUG_PACKET
|
| 377 |
{
|
| 378 |
const char *pidstr; |
| 379 |
switch(p->pid) {
|
| 380 |
case USB_TOKEN_SETUP: pidstr = "SETUP"; break; |
| 381 |
case USB_TOKEN_IN: pidstr = "IN"; break; |
| 382 |
case USB_TOKEN_OUT: pidstr = "OUT"; break; |
| 383 |
default: pidstr = "?"; break; |
| 384 |
} |
| 385 |
printf("frame %d: pid=%s addr=0x%02x ep=%d len=%d\n",
|
| 386 |
s->frnum, pidstr, p->devaddr, p->devep, p->len); |
| 387 |
if (p->pid != USB_TOKEN_IN) {
|
| 388 |
printf(" data_out=");
|
| 389 |
for(i = 0; i < p->len; i++) { |
| 390 |
printf(" %02x", p->data[i]);
|
| 391 |
} |
| 392 |
printf("\n");
|
| 393 |
} |
| 394 |
} |
| 395 |
#endif
|
| 396 |
for(i = 0; i < NB_PORTS; i++) { |
| 397 |
port = &s->ports[i]; |
| 398 |
dev = port->port.dev; |
| 399 |
if (dev && (port->ctrl & UHCI_PORT_EN)) {
|
| 400 |
ret = dev->handle_packet(dev, p); |
| 401 |
if (ret != USB_RET_NODEV) {
|
| 402 |
#ifdef DEBUG_PACKET
|
| 403 |
if (ret == USB_RET_ASYNC) {
|
| 404 |
printf("usb-uhci: Async packet\n");
|
| 405 |
} else {
|
| 406 |
printf(" ret=%d ", ret);
|
| 407 |
if (p->pid == USB_TOKEN_IN && ret > 0) { |
| 408 |
printf("data_in=");
|
| 409 |
for(i = 0; i < ret; i++) { |
| 410 |
printf(" %02x", p->data[i]);
|
| 411 |
} |
| 412 |
} |
| 413 |
printf("\n");
|
| 414 |
} |
| 415 |
#endif
|
| 416 |
return ret;
|
| 417 |
} |
| 418 |
} |
| 419 |
} |
| 420 |
return USB_RET_NODEV;
|
| 421 |
} |
| 422 |
|
| 423 |
static void uhci_async_complete_packet(USBPacket * packet, void *opaque); |
| 424 |
|
| 425 |
/* return -1 if fatal error (frame must be stopped)
|
| 426 |
0 if TD successful
|
| 427 |
1 if TD unsuccessful or inactive
|
| 428 |
*/
|
| 429 |
static int uhci_handle_td(UHCIState *s, UHCI_TD *td, int *int_mask) |
| 430 |
{
|
| 431 |
uint8_t pid; |
| 432 |
int len, max_len, err, ret;
|
| 433 |
|
| 434 |
/* ??? This is wrong for async completion. */
|
| 435 |
if (td->ctrl & TD_CTRL_IOC) {
|
| 436 |
*int_mask |= 0x01;
|
| 437 |
} |
| 438 |
|
| 439 |
if (!(td->ctrl & TD_CTRL_ACTIVE))
|
| 440 |
return 1; |
| 441 |
|
| 442 |
/* TD is active */
|
| 443 |
max_len = ((td->token >> 21) + 1) & 0x7ff; |
| 444 |
pid = td->token & 0xff;
|
| 445 |
if (s->async_qh) {
|
| 446 |
ret = s->usb_packet.len; |
| 447 |
if (ret >= 0) { |
| 448 |
len = ret; |
| 449 |
if (len > max_len) {
|
| 450 |
len = max_len; |
| 451 |
ret = USB_RET_BABBLE; |
| 452 |
} |
| 453 |
if (len > 0) { |
| 454 |
/* write the data back */
|
| 455 |
cpu_physical_memory_write(td->buffer, s->usb_buf, len); |
| 456 |
} |
| 457 |
} else {
|
| 458 |
len = 0;
|
| 459 |
} |
| 460 |
s->async_qh = 0;
|
| 461 |
} else {
|
| 462 |
s->usb_packet.pid = pid; |
| 463 |
s->usb_packet.devaddr = (td->token >> 8) & 0x7f; |
| 464 |
s->usb_packet.devep = (td->token >> 15) & 0xf; |
| 465 |
s->usb_packet.data = s->usb_buf; |
| 466 |
s->usb_packet.len = max_len; |
| 467 |
s->usb_packet.complete_cb = uhci_async_complete_packet; |
| 468 |
s->usb_packet.complete_opaque = s; |
| 469 |
switch(pid) {
|
| 470 |
case USB_TOKEN_OUT:
|
| 471 |
case USB_TOKEN_SETUP:
|
| 472 |
cpu_physical_memory_read(td->buffer, s->usb_buf, max_len); |
| 473 |
ret = uhci_broadcast_packet(s, &s->usb_packet); |
| 474 |
len = max_len; |
| 475 |
break;
|
| 476 |
case USB_TOKEN_IN:
|
| 477 |
ret = uhci_broadcast_packet(s, &s->usb_packet); |
| 478 |
if (ret >= 0) { |
| 479 |
len = ret; |
| 480 |
if (len > max_len) {
|
| 481 |
len = max_len; |
| 482 |
ret = USB_RET_BABBLE; |
| 483 |
} |
| 484 |
if (len > 0) { |
| 485 |
/* write the data back */
|
| 486 |
cpu_physical_memory_write(td->buffer, s->usb_buf, len); |
| 487 |
} |
| 488 |
} else {
|
| 489 |
len = 0;
|
| 490 |
} |
| 491 |
break;
|
| 492 |
default:
|
| 493 |
/* invalid pid : frame interrupted */
|
| 494 |
s->status |= UHCI_STS_HCPERR; |
| 495 |
uhci_update_irq(s); |
| 496 |
return -1; |
| 497 |
} |
| 498 |
} |
| 499 |
if (ret == USB_RET_ASYNC) {
|
| 500 |
return 2; |
| 501 |
} |
| 502 |
if (td->ctrl & TD_CTRL_IOS)
|
| 503 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
| 504 |
if (ret >= 0) { |
| 505 |
td->ctrl = (td->ctrl & ~0x7ff) | ((len - 1) & 0x7ff); |
| 506 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
| 507 |
if (pid == USB_TOKEN_IN &&
|
| 508 |
(td->ctrl & TD_CTRL_SPD) && |
| 509 |
len < max_len) {
|
| 510 |
*int_mask |= 0x02;
|
| 511 |
/* short packet: do not update QH */
|
| 512 |
return 1; |
| 513 |
} else {
|
| 514 |
/* success */
|
| 515 |
return 0; |
| 516 |
} |
| 517 |
} else {
|
| 518 |
switch(ret) {
|
| 519 |
default:
|
| 520 |
case USB_RET_NODEV:
|
| 521 |
do_timeout:
|
| 522 |
td->ctrl |= TD_CTRL_TIMEOUT; |
| 523 |
err = (td->ctrl >> TD_CTRL_ERROR_SHIFT) & 3;
|
| 524 |
if (err != 0) { |
| 525 |
err--; |
| 526 |
if (err == 0) { |
| 527 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
| 528 |
s->status |= UHCI_STS_USBERR; |
| 529 |
uhci_update_irq(s); |
| 530 |
} |
| 531 |
} |
| 532 |
td->ctrl = (td->ctrl & ~(3 << TD_CTRL_ERROR_SHIFT)) |
|
| 533 |
(err << TD_CTRL_ERROR_SHIFT); |
| 534 |
return 1; |
| 535 |
case USB_RET_NAK:
|
| 536 |
td->ctrl |= TD_CTRL_NAK; |
| 537 |
if (pid == USB_TOKEN_SETUP)
|
| 538 |
goto do_timeout;
|
| 539 |
return 1; |
| 540 |
case USB_RET_STALL:
|
| 541 |
td->ctrl |= TD_CTRL_STALL; |
| 542 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
| 543 |
return 1; |
| 544 |
case USB_RET_BABBLE:
|
| 545 |
td->ctrl |= TD_CTRL_BABBLE | TD_CTRL_STALL; |
| 546 |
td->ctrl &= ~TD_CTRL_ACTIVE; |
| 547 |
/* frame interrupted */
|
| 548 |
return -1; |
| 549 |
} |
| 550 |
} |
| 551 |
} |
| 552 |
|
| 553 |
static void uhci_async_complete_packet(USBPacket * packet, void *opaque) |
| 554 |
{
|
| 555 |
UHCIState *s = opaque; |
| 556 |
UHCI_QH qh; |
| 557 |
UHCI_TD td; |
| 558 |
uint32_t link; |
| 559 |
uint32_t old_td_ctrl; |
| 560 |
uint32_t val; |
| 561 |
int ret;
|
| 562 |
|
| 563 |
link = s->async_qh; |
| 564 |
if (!link) {
|
| 565 |
/* This should never happen. It means a TD somehow got removed
|
| 566 |
without cancelling the associated async IO request. */
|
| 567 |
return;
|
| 568 |
} |
| 569 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *)&qh, sizeof(qh)); |
| 570 |
le32_to_cpus(&qh.link); |
| 571 |
le32_to_cpus(&qh.el_link); |
| 572 |
/* Re-process the queue containing the async packet. */
|
| 573 |
while (1) { |
| 574 |
cpu_physical_memory_read(qh.el_link & ~0xf,
|
| 575 |
(uint8_t *)&td, sizeof(td));
|
| 576 |
le32_to_cpus(&td.link); |
| 577 |
le32_to_cpus(&td.ctrl); |
| 578 |
le32_to_cpus(&td.token); |
| 579 |
le32_to_cpus(&td.buffer); |
| 580 |
old_td_ctrl = td.ctrl; |
| 581 |
ret = uhci_handle_td(s, &td, &s->pending_int_mask); |
| 582 |
/* update the status bits of the TD */
|
| 583 |
if (old_td_ctrl != td.ctrl) {
|
| 584 |
val = cpu_to_le32(td.ctrl); |
| 585 |
cpu_physical_memory_write((qh.el_link & ~0xf) + 4, |
| 586 |
(const uint8_t *)&val,
|
| 587 |
sizeof(val));
|
| 588 |
} |
| 589 |
if (ret < 0) |
| 590 |
break; /* interrupted frame */ |
| 591 |
if (ret == 2) { |
| 592 |
s->async_qh = link; |
| 593 |
break;
|
| 594 |
} else if (ret == 0) { |
| 595 |
/* update qh element link */
|
| 596 |
qh.el_link = td.link; |
| 597 |
val = cpu_to_le32(qh.el_link); |
| 598 |
cpu_physical_memory_write((link & ~0xf) + 4, |
| 599 |
(const uint8_t *)&val,
|
| 600 |
sizeof(val));
|
| 601 |
if (!(qh.el_link & 4)) |
| 602 |
break;
|
| 603 |
} |
| 604 |
break;
|
| 605 |
} |
| 606 |
} |
| 607 |
|
| 608 |
static void uhci_frame_timer(void *opaque) |
| 609 |
{
|
| 610 |
UHCIState *s = opaque; |
| 611 |
int64_t expire_time; |
| 612 |
uint32_t frame_addr, link, old_td_ctrl, val; |
| 613 |
int int_mask, cnt, ret;
|
| 614 |
UHCI_TD td; |
| 615 |
UHCI_QH qh; |
| 616 |
uint32_t old_async_qh; |
| 617 |
|
| 618 |
if (!(s->cmd & UHCI_CMD_RS)) {
|
| 619 |
qemu_del_timer(s->frame_timer); |
| 620 |
/* set hchalted bit in status - UHCI11D 2.1.2 */
|
| 621 |
s->status |= UHCI_STS_HCHALTED; |
| 622 |
return;
|
| 623 |
} |
| 624 |
/* Complete the previous frame. */
|
| 625 |
s->frnum = (s->frnum + 1) & 0x7ff; |
| 626 |
if (s->pending_int_mask) {
|
| 627 |
s->status2 |= s->pending_int_mask; |
| 628 |
s->status |= UHCI_STS_USBINT; |
| 629 |
uhci_update_irq(s); |
| 630 |
} |
| 631 |
old_async_qh = s->async_qh; |
| 632 |
frame_addr = s->fl_base_addr + ((s->frnum & 0x3ff) << 2); |
| 633 |
cpu_physical_memory_read(frame_addr, (uint8_t *)&link, 4);
|
| 634 |
le32_to_cpus(&link); |
| 635 |
int_mask = 0;
|
| 636 |
cnt = FRAME_MAX_LOOPS; |
| 637 |
while ((link & 1) == 0) { |
| 638 |
if (--cnt == 0) |
| 639 |
break;
|
| 640 |
/* valid frame */
|
| 641 |
if (link & 2) { |
| 642 |
/* QH */
|
| 643 |
if (link == s->async_qh) {
|
| 644 |
/* We've found a previously issues packet.
|
| 645 |
Nothing else to do. */
|
| 646 |
old_async_qh = 0;
|
| 647 |
break;
|
| 648 |
} |
| 649 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *)&qh, sizeof(qh)); |
| 650 |
le32_to_cpus(&qh.link); |
| 651 |
le32_to_cpus(&qh.el_link); |
| 652 |
depth_first:
|
| 653 |
if (qh.el_link & 1) { |
| 654 |
/* no element : go to next entry */
|
| 655 |
link = qh.link; |
| 656 |
} else if (qh.el_link & 2) { |
| 657 |
/* QH */
|
| 658 |
link = qh.el_link; |
| 659 |
} else if (s->async_qh) { |
| 660 |
/* We can only cope with one pending packet. Keep looking
|
| 661 |
for the previously issued packet. */
|
| 662 |
link = qh.link; |
| 663 |
} else {
|
| 664 |
/* TD */
|
| 665 |
if (--cnt == 0) |
| 666 |
break;
|
| 667 |
cpu_physical_memory_read(qh.el_link & ~0xf,
|
| 668 |
(uint8_t *)&td, sizeof(td));
|
| 669 |
le32_to_cpus(&td.link); |
| 670 |
le32_to_cpus(&td.ctrl); |
| 671 |
le32_to_cpus(&td.token); |
| 672 |
le32_to_cpus(&td.buffer); |
| 673 |
old_td_ctrl = td.ctrl; |
| 674 |
ret = uhci_handle_td(s, &td, &int_mask); |
| 675 |
/* update the status bits of the TD */
|
| 676 |
if (old_td_ctrl != td.ctrl) {
|
| 677 |
val = cpu_to_le32(td.ctrl); |
| 678 |
cpu_physical_memory_write((qh.el_link & ~0xf) + 4, |
| 679 |
(const uint8_t *)&val,
|
| 680 |
sizeof(val));
|
| 681 |
} |
| 682 |
if (ret < 0) |
| 683 |
break; /* interrupted frame */ |
| 684 |
if (ret == 2) { |
| 685 |
s->async_qh = link; |
| 686 |
} else if (ret == 0) { |
| 687 |
/* update qh element link */
|
| 688 |
qh.el_link = td.link; |
| 689 |
val = cpu_to_le32(qh.el_link); |
| 690 |
cpu_physical_memory_write((link & ~0xf) + 4, |
| 691 |
(const uint8_t *)&val,
|
| 692 |
sizeof(val));
|
| 693 |
if (qh.el_link & 4) { |
| 694 |
/* depth first */
|
| 695 |
goto depth_first;
|
| 696 |
} |
| 697 |
} |
| 698 |
/* go to next entry */
|
| 699 |
link = qh.link; |
| 700 |
} |
| 701 |
} else {
|
| 702 |
/* TD */
|
| 703 |
cpu_physical_memory_read(link & ~0xf, (uint8_t *)&td, sizeof(td)); |
| 704 |
le32_to_cpus(&td.link); |
| 705 |
le32_to_cpus(&td.ctrl); |
| 706 |
le32_to_cpus(&td.token); |
| 707 |
le32_to_cpus(&td.buffer); |
| 708 |
/* Ignore isochonous transfers while there is an async packet
|
| 709 |
pending. This is wrong, but we don't implement isochronous
|
| 710 |
transfers anyway. */
|
| 711 |
if (s->async_qh == 0) { |
| 712 |
old_td_ctrl = td.ctrl; |
| 713 |
ret = uhci_handle_td(s, &td, &int_mask); |
| 714 |
/* update the status bits of the TD */
|
| 715 |
if (old_td_ctrl != td.ctrl) {
|
| 716 |
val = cpu_to_le32(td.ctrl); |
| 717 |
cpu_physical_memory_write((link & ~0xf) + 4, |
| 718 |
(const uint8_t *)&val,
|
| 719 |
sizeof(val));
|
| 720 |
} |
| 721 |
if (ret < 0) |
| 722 |
break; /* interrupted frame */ |
| 723 |
if (ret == 2) { |
| 724 |
/* We can't handle async isochronous transfers.
|
| 725 |
Cancel The packet. */
|
| 726 |
fprintf(stderr, "usb-uhci: Unimplemented async packet\n");
|
| 727 |
usb_cancel_packet(&s->usb_packet); |
| 728 |
} |
| 729 |
} |
| 730 |
link = td.link; |
| 731 |
} |
| 732 |
} |
| 733 |
s->pending_int_mask = int_mask; |
| 734 |
if (old_async_qh) {
|
| 735 |
/* A previously started transfer has disappeared from the transfer
|
| 736 |
list. There's nothing useful we can do with it now, so just
|
| 737 |
discard the packet and hope it wasn't too important. */
|
| 738 |
#ifdef DEBUG
|
| 739 |
printf("Discarding USB packet\n");
|
| 740 |
#endif
|
| 741 |
usb_cancel_packet(&s->usb_packet); |
| 742 |
s->async_qh = 0;
|
| 743 |
} |
| 744 |
/* prepare the timer for the next frame */
|
| 745 |
expire_time = qemu_get_clock(vm_clock) + |
| 746 |
(ticks_per_sec / FRAME_TIMER_FREQ); |
| 747 |
qemu_mod_timer(s->frame_timer, expire_time); |
| 748 |
} |
| 749 |
|
| 750 |
static void uhci_map(PCIDevice *pci_dev, int region_num, |
| 751 |
uint32_t addr, uint32_t size, int type)
|
| 752 |
{
|
| 753 |
UHCIState *s = (UHCIState *)pci_dev; |
| 754 |
|
| 755 |
register_ioport_write(addr, 32, 2, uhci_ioport_writew, s); |
| 756 |
register_ioport_read(addr, 32, 2, uhci_ioport_readw, s); |
| 757 |
register_ioport_write(addr, 32, 4, uhci_ioport_writel, s); |
| 758 |
register_ioport_read(addr, 32, 4, uhci_ioport_readl, s); |
| 759 |
register_ioport_write(addr, 32, 1, uhci_ioport_writeb, s); |
| 760 |
register_ioport_read(addr, 32, 1, uhci_ioport_readb, s); |
| 761 |
} |
| 762 |
|
| 763 |
void usb_uhci_init(PCIBus *bus, int devfn) |
| 764 |
{
|
| 765 |
UHCIState *s; |
| 766 |
uint8_t *pci_conf; |
| 767 |
int i;
|
| 768 |
|
| 769 |
s = (UHCIState *)pci_register_device(bus, |
| 770 |
"USB-UHCI", sizeof(UHCIState), |
| 771 |
devfn, NULL, NULL); |
| 772 |
pci_conf = s->dev.config; |
| 773 |
pci_conf[0x00] = 0x86; |
| 774 |
pci_conf[0x01] = 0x80; |
| 775 |
pci_conf[0x02] = 0x20; |
| 776 |
pci_conf[0x03] = 0x70; |
| 777 |
pci_conf[0x08] = 0x01; // revision number |
| 778 |
pci_conf[0x09] = 0x00; |
| 779 |
pci_conf[0x0a] = 0x03; |
| 780 |
pci_conf[0x0b] = 0x0c; |
| 781 |
pci_conf[0x0e] = 0x00; // header_type |
| 782 |
pci_conf[0x3d] = 4; // interrupt pin 3 |
| 783 |
pci_conf[0x60] = 0x10; // release number |
| 784 |
|
| 785 |
for(i = 0; i < NB_PORTS; i++) { |
| 786 |
qemu_register_usb_port(&s->ports[i].port, s, i, uhci_attach); |
| 787 |
} |
| 788 |
s->frame_timer = qemu_new_timer(vm_clock, uhci_frame_timer, s); |
| 789 |
|
| 790 |
uhci_reset(s); |
| 791 |
|
| 792 |
/* Use region 4 for consistency with real hardware. BSD guests seem
|
| 793 |
to rely on this. */
|
| 794 |
pci_register_io_region(&s->dev, 4, 0x20, |
| 795 |
PCI_ADDRESS_SPACE_IO, uhci_map); |
| 796 |
} |