git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1600 c046a42c-6fe2-441c-8c8c-71466251a162
673 lines
19 KiB
C
673 lines
19 KiB
C
/*
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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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#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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#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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#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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#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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typedef struct UHCIPort {
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USBPort port;
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uint16_t ctrl;
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USBDevice *dev; /* connected device */
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} UHCIPort;
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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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} 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->dev)
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uhci_attach(&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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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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}
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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->dev;
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if (dev) {
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dev->handle_packet(dev,
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USB_MSG_RESET, 0, 0, NULL, 0);
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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_GRESET) {
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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->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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dev->handle_packet(dev,
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USB_MSG_RESET, 0, 0, NULL, 0);
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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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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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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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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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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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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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}
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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];
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if (dev) {
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if (port->dev) {
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usb_attach(port1, NULL);
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}
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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 | UHCI_PORT_CSC;
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}
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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->dev = dev;
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/* send the attach message */
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dev->handle_packet(dev,
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USB_MSG_ATTACH, 0, 0, NULL, 0);
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} 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 | UHCI_PORT_CSC;
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}
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/* disable port */
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if (port->ctrl & UHCI_PORT_EN) {
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port->ctrl &= ~UHCI_PORT_EN;
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port->ctrl |= UHCI_PORT_ENC;
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}
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dev = port->dev;
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if (dev) {
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/* send the detach message */
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dev->handle_packet(dev,
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USB_MSG_DETACH, 0, 0, NULL, 0);
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}
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port->dev = NULL;
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}
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}
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static int uhci_broadcast_packet(UHCIState *s, uint8_t pid,
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uint8_t devaddr, uint8_t devep,
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uint8_t *data, int len)
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{
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UHCIPort *port;
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USBDevice *dev;
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int i, ret;
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#ifdef DEBUG_PACKET
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{
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const char *pidstr;
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switch(pid) {
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case USB_TOKEN_SETUP: pidstr = "SETUP"; break;
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case USB_TOKEN_IN: pidstr = "IN"; break;
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case USB_TOKEN_OUT: pidstr = "OUT"; break;
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default: pidstr = "?"; break;
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}
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printf("frame %d: pid=%s addr=0x%02x ep=%d len=%d\n",
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s->frnum, pidstr, devaddr, devep, len);
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if (pid != USB_TOKEN_IN) {
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printf(" data_out=");
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for(i = 0; i < len; i++) {
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printf(" %02x", data[i]);
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}
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printf("\n");
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}
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}
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#endif
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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->dev;
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if (dev && (port->ctrl & UHCI_PORT_EN)) {
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ret = dev->handle_packet(dev, pid,
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devaddr, devep,
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data, len);
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if (ret != USB_RET_NODEV) {
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#ifdef DEBUG_PACKET
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{
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printf(" ret=%d ", ret);
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if (pid == USB_TOKEN_IN && ret > 0) {
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printf("data_in=");
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for(i = 0; i < ret; i++) {
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printf(" %02x", data[i]);
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}
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}
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printf("\n");
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}
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#endif
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return ret;
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}
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}
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}
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return USB_RET_NODEV;
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}
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/* return -1 if fatal error (frame must be stopped)
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0 if TD successful
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1 if TD unsuccessful or inactive
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*/
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static int uhci_handle_td(UHCIState *s, UHCI_TD *td, int *int_mask)
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{
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uint8_t pid;
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uint8_t buf[1280];
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int len, max_len, err, ret;
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if (td->ctrl & TD_CTRL_IOC) {
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*int_mask |= 0x01;
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}
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if (!(td->ctrl & TD_CTRL_ACTIVE))
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return 1;
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/* TD is active */
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max_len = ((td->token >> 21) + 1) & 0x7ff;
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pid = td->token & 0xff;
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switch(pid) {
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case USB_TOKEN_OUT:
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case USB_TOKEN_SETUP:
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cpu_physical_memory_read(td->buffer, buf, max_len);
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ret = uhci_broadcast_packet(s, pid,
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(td->token >> 8) & 0x7f,
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(td->token >> 15) & 0xf,
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buf, max_len);
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len = max_len;
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break;
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case USB_TOKEN_IN:
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ret = uhci_broadcast_packet(s, pid,
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(td->token >> 8) & 0x7f,
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(td->token >> 15) & 0xf,
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buf, max_len);
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if (ret >= 0) {
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len = ret;
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if (len > max_len) {
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len = max_len;
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ret = USB_RET_BABBLE;
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}
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if (len > 0) {
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/* write the data back */
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cpu_physical_memory_write(td->buffer, buf, len);
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}
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} else {
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len = 0;
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}
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break;
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default:
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/* invalid pid : frame interrupted */
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s->status |= UHCI_STS_HCPERR;
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uhci_update_irq(s);
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return -1;
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}
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if (td->ctrl & TD_CTRL_IOS)
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td->ctrl &= ~TD_CTRL_ACTIVE;
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if (ret >= 0) {
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td->ctrl = (td->ctrl & ~0x7ff) | ((len - 1) & 0x7ff);
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td->ctrl &= ~TD_CTRL_ACTIVE;
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if (pid == USB_TOKEN_IN &&
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(td->ctrl & TD_CTRL_SPD) &&
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len < max_len) {
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*int_mask |= 0x02;
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/* short packet: do not update QH */
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return 1;
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} else {
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/* success */
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return 0;
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}
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} else {
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switch(ret) {
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default:
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case USB_RET_NODEV:
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do_timeout:
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td->ctrl |= TD_CTRL_TIMEOUT;
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err = (td->ctrl >> TD_CTRL_ERROR_SHIFT) & 3;
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if (err != 0) {
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err--;
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if (err == 0) {
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td->ctrl &= ~TD_CTRL_ACTIVE;
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s->status |= UHCI_STS_USBERR;
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uhci_update_irq(s);
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}
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}
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td->ctrl = (td->ctrl & ~(3 << TD_CTRL_ERROR_SHIFT)) |
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(err << TD_CTRL_ERROR_SHIFT);
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return 1;
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case USB_RET_NAK:
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td->ctrl |= TD_CTRL_NAK;
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if (pid == USB_TOKEN_SETUP)
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goto do_timeout;
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return 1;
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case USB_RET_STALL:
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td->ctrl |= TD_CTRL_STALL;
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td->ctrl &= ~TD_CTRL_ACTIVE;
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return 1;
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case USB_RET_BABBLE:
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td->ctrl |= TD_CTRL_BABBLE | TD_CTRL_STALL;
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td->ctrl &= ~TD_CTRL_ACTIVE;
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/* frame interrupted */
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return -1;
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}
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}
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}
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static void uhci_frame_timer(void *opaque)
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{
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UHCIState *s = opaque;
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int64_t expire_time;
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uint32_t frame_addr, link, old_td_ctrl, val;
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int int_mask, cnt, ret;
|
|
UHCI_TD td;
|
|
UHCI_QH qh;
|
|
|
|
if (!(s->cmd & UHCI_CMD_RS)) {
|
|
qemu_del_timer(s->frame_timer);
|
|
return;
|
|
}
|
|
frame_addr = s->fl_base_addr + ((s->frnum & 0x3ff) << 2);
|
|
cpu_physical_memory_read(frame_addr, (uint8_t *)&link, 4);
|
|
le32_to_cpus(&link);
|
|
int_mask = 0;
|
|
cnt = FRAME_MAX_LOOPS;
|
|
while ((link & 1) == 0) {
|
|
if (--cnt == 0)
|
|
break;
|
|
/* valid frame */
|
|
if (link & 2) {
|
|
/* QH */
|
|
cpu_physical_memory_read(link & ~0xf, (uint8_t *)&qh, sizeof(qh));
|
|
le32_to_cpus(&qh.link);
|
|
le32_to_cpus(&qh.el_link);
|
|
depth_first:
|
|
if (qh.el_link & 1) {
|
|
/* no element : go to next entry */
|
|
link = qh.link;
|
|
} else if (qh.el_link & 2) {
|
|
/* QH */
|
|
link = qh.el_link;
|
|
} else {
|
|
/* TD */
|
|
if (--cnt == 0)
|
|
break;
|
|
cpu_physical_memory_read(qh.el_link & ~0xf,
|
|
(uint8_t *)&td, sizeof(td));
|
|
le32_to_cpus(&td.link);
|
|
le32_to_cpus(&td.ctrl);
|
|
le32_to_cpus(&td.token);
|
|
le32_to_cpus(&td.buffer);
|
|
old_td_ctrl = td.ctrl;
|
|
ret = uhci_handle_td(s, &td, &int_mask);
|
|
/* update the status bits of the TD */
|
|
if (old_td_ctrl != td.ctrl) {
|
|
val = cpu_to_le32(td.ctrl);
|
|
cpu_physical_memory_write((qh.el_link & ~0xf) + 4,
|
|
(const uint8_t *)&val,
|
|
sizeof(val));
|
|
}
|
|
if (ret < 0)
|
|
break; /* interrupted frame */
|
|
if (ret == 0) {
|
|
/* update qh element link */
|
|
qh.el_link = td.link;
|
|
val = cpu_to_le32(qh.el_link);
|
|
cpu_physical_memory_write((link & ~0xf) + 4,
|
|
(const uint8_t *)&val,
|
|
sizeof(val));
|
|
if (qh.el_link & 4) {
|
|
/* depth first */
|
|
goto depth_first;
|
|
}
|
|
}
|
|
/* go to next entry */
|
|
link = qh.link;
|
|
}
|
|
} else {
|
|
/* TD */
|
|
cpu_physical_memory_read(link & ~0xf, (uint8_t *)&td, sizeof(td));
|
|
le32_to_cpus(&td.link);
|
|
le32_to_cpus(&td.ctrl);
|
|
le32_to_cpus(&td.token);
|
|
le32_to_cpus(&td.buffer);
|
|
old_td_ctrl = td.ctrl;
|
|
ret = uhci_handle_td(s, &td, &int_mask);
|
|
/* update the status bits of the TD */
|
|
if (old_td_ctrl != td.ctrl) {
|
|
val = cpu_to_le32(td.ctrl);
|
|
cpu_physical_memory_write((link & ~0xf) + 4,
|
|
(const uint8_t *)&val,
|
|
sizeof(val));
|
|
}
|
|
if (ret < 0)
|
|
break; /* interrupted frame */
|
|
link = td.link;
|
|
}
|
|
}
|
|
s->frnum = (s->frnum + 1) & 0x7ff;
|
|
if (int_mask) {
|
|
s->status2 |= int_mask;
|
|
s->status |= UHCI_STS_USBINT;
|
|
uhci_update_irq(s);
|
|
}
|
|
/* prepare the timer for the next frame */
|
|
expire_time = qemu_get_clock(vm_clock) +
|
|
(ticks_per_sec / FRAME_TIMER_FREQ);
|
|
qemu_mod_timer(s->frame_timer, expire_time);
|
|
}
|
|
|
|
static void uhci_map(PCIDevice *pci_dev, int region_num,
|
|
uint32_t addr, uint32_t size, int type)
|
|
{
|
|
UHCIState *s = (UHCIState *)pci_dev;
|
|
|
|
register_ioport_write(addr, 32, 2, uhci_ioport_writew, s);
|
|
register_ioport_read(addr, 32, 2, uhci_ioport_readw, s);
|
|
register_ioport_write(addr, 32, 4, uhci_ioport_writel, s);
|
|
register_ioport_read(addr, 32, 4, uhci_ioport_readl, s);
|
|
register_ioport_write(addr, 32, 1, uhci_ioport_writeb, s);
|
|
register_ioport_read(addr, 32, 1, uhci_ioport_readb, s);
|
|
}
|
|
|
|
void usb_uhci_init(PCIBus *bus, USBPort **usb_ports)
|
|
{
|
|
UHCIState *s;
|
|
uint8_t *pci_conf;
|
|
UHCIPort *port;
|
|
int i;
|
|
|
|
s = (UHCIState *)pci_register_device(bus,
|
|
"USB-UHCI", sizeof(UHCIState),
|
|
((PCIDevice *)piix3_state)->devfn + 2,
|
|
NULL, NULL);
|
|
pci_conf = s->dev.config;
|
|
pci_conf[0x00] = 0x86;
|
|
pci_conf[0x01] = 0x80;
|
|
pci_conf[0x02] = 0x20;
|
|
pci_conf[0x03] = 0x70;
|
|
pci_conf[0x08] = 0x01; // revision number
|
|
pci_conf[0x09] = 0x00;
|
|
pci_conf[0x0a] = 0x03;
|
|
pci_conf[0x0b] = 0x0c;
|
|
pci_conf[0x0e] = 0x00; // header_type
|
|
pci_conf[0x3d] = 4; // interrupt pin 3
|
|
|
|
for(i = 0; i < NB_PORTS; i++) {
|
|
port = &s->ports[i];
|
|
port->port.opaque = s;
|
|
port->port.index = i;
|
|
port->port.attach = uhci_attach;
|
|
usb_ports[i] = &port->port;
|
|
}
|
|
s->frame_timer = qemu_new_timer(vm_clock, uhci_frame_timer, s);
|
|
|
|
uhci_reset(s);
|
|
|
|
pci_register_io_region(&s->dev, 0, 0x20,
|
|
PCI_ADDRESS_SPACE_IO, uhci_map);
|
|
}
|