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/*
* QEMU USB EHCI Emulation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or(at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw/hw.h"
#include "qemu-timer.h"
#include "hw/usb.h"
#include "monitor.h"
#include "trace.h"
#include "dma.h"
#include "sysemu.h"
#ifndef EHCI_DEBUG
#define EHCI_DEBUG 0
#endif
#if EHCI_DEBUG
#define DPRINTF printf
#else
#define DPRINTF(...)
#endif
#define MMIO_SIZE 0x1000
#define CAPA_SIZE 0x10
#define PORTSC 0x0044
#define PORTSC_BEGIN PORTSC
#define PORTSC_END (PORTSC + 4 * NB_PORTS)
#define NB_PORTS 6 /* Number of downstream ports */
typedef struct EHCIPacket EHCIPacket;
typedef struct EHCIQueue EHCIQueue;
typedef struct EHCIState EHCIState;
/* EHCI spec version 1.0 Section 3.3
*/
typedef struct EHCIitd {
uint32_t next;
uint32_t transact[8];
#define ITD_XACT_ACTIVE (1 << 31)
#define ITD_XACT_DBERROR (1 << 30)
#define ITD_XACT_BABBLE (1 << 29)
#define ITD_XACT_XACTERR (1 << 28)
#define ITD_XACT_LENGTH_MASK 0x0fff0000
#define ITD_XACT_LENGTH_SH 16
#define ITD_XACT_IOC (1 << 15)
#define ITD_XACT_PGSEL_MASK 0x00007000
#define ITD_XACT_PGSEL_SH 12
#define ITD_XACT_OFFSET_MASK 0x00000fff
uint32_t bufptr[7];
#define ITD_BUFPTR_MASK 0xfffff000
#define ITD_BUFPTR_SH 12
#define ITD_BUFPTR_EP_MASK 0x00000f00
#define ITD_BUFPTR_EP_SH 8
#define ITD_BUFPTR_DEVADDR_MASK 0x0000007f
#define ITD_BUFPTR_DEVADDR_SH 0
#define ITD_BUFPTR_DIRECTION (1 << 11)
#define ITD_BUFPTR_MAXPKT_MASK 0x000007ff
#define ITD_BUFPTR_MAXPKT_SH 0
#define ITD_BUFPTR_MULT_MASK 0x00000003
#define ITD_BUFPTR_MULT_SH 0
} EHCIitd;
/* EHCI spec version 1.0 Section 3.4
*/
typedef struct EHCIsitd {
uint32_t next; /* Standard next link pointer */
uint32_t epchar;
#define SITD_EPCHAR_IO (1 << 31)
#define SITD_EPCHAR_PORTNUM_MASK 0x7f000000
#define SITD_EPCHAR_PORTNUM_SH 24
#define SITD_EPCHAR_HUBADD_MASK 0x007f0000
#define SITD_EPCHAR_HUBADDR_SH 16
#define SITD_EPCHAR_EPNUM_MASK 0x00000f00
#define SITD_EPCHAR_EPNUM_SH 8
#define SITD_EPCHAR_DEVADDR_MASK 0x0000007f
uint32_t uframe;
#define SITD_UFRAME_CMASK_MASK 0x0000ff00
#define SITD_UFRAME_CMASK_SH 8
#define SITD_UFRAME_SMASK_MASK 0x000000ff
uint32_t results;
#define SITD_RESULTS_IOC (1 << 31)
#define SITD_RESULTS_PGSEL (1 << 30)
#define SITD_RESULTS_TBYTES_MASK 0x03ff0000
#define SITD_RESULTS_TYBYTES_SH 16
#define SITD_RESULTS_CPROGMASK_MASK 0x0000ff00
#define SITD_RESULTS_CPROGMASK_SH 8
#define SITD_RESULTS_ACTIVE (1 << 7)
#define SITD_RESULTS_ERR (1 << 6)
#define SITD_RESULTS_DBERR (1 << 5)
#define SITD_RESULTS_BABBLE (1 << 4)
#define SITD_RESULTS_XACTERR (1 << 3)
#define SITD_RESULTS_MISSEDUF (1 << 2)
#define SITD_RESULTS_SPLITXSTATE (1 << 1)
uint32_t bufptr[2];
#define SITD_BUFPTR_MASK 0xfffff000
#define SITD_BUFPTR_CURROFF_MASK 0x00000fff
#define SITD_BUFPTR_TPOS_MASK 0x00000018
#define SITD_BUFPTR_TPOS_SH 3
#define SITD_BUFPTR_TCNT_MASK 0x00000007
uint32_t backptr; /* Standard next link pointer */
} EHCIsitd;
/* EHCI spec version 1.0 Section 3.5
*/
typedef struct EHCIqtd {
uint32_t next; /* Standard next link pointer */
uint32_t altnext; /* Standard next link pointer */
uint32_t token;
#define QTD_TOKEN_DTOGGLE (1 << 31)
#define QTD_TOKEN_TBYTES_MASK 0x7fff0000
#define QTD_TOKEN_TBYTES_SH 16
#define QTD_TOKEN_IOC (1 << 15)
#define QTD_TOKEN_CPAGE_MASK 0x00007000
#define QTD_TOKEN_CPAGE_SH 12
#define QTD_TOKEN_CERR_MASK 0x00000c00
#define QTD_TOKEN_CERR_SH 10
#define QTD_TOKEN_PID_MASK 0x00000300
#define QTD_TOKEN_PID_SH 8
#define QTD_TOKEN_ACTIVE (1 << 7)
#define QTD_TOKEN_HALT (1 << 6)
#define QTD_TOKEN_DBERR (1 << 5)
#define QTD_TOKEN_BABBLE (1 << 4)
#define QTD_TOKEN_XACTERR (1 << 3)
#define QTD_TOKEN_MISSEDUF (1 << 2)
#define QTD_TOKEN_SPLITXSTATE (1 << 1)
#define QTD_TOKEN_PING (1 << 0)
uint32_t bufptr[5]; /* Standard buffer pointer */
#define QTD_BUFPTR_MASK 0xfffff000
#define QTD_BUFPTR_SH 12
} EHCIqtd;
/* EHCI spec version 1.0 Section 3.6
*/
typedef struct EHCIqh {
uint32_t next; /* Standard next link pointer */
/* endpoint characteristics */
uint32_t epchar;
#define QH_EPCHAR_RL_MASK 0xf0000000
#define QH_EPCHAR_RL_SH 28
#define QH_EPCHAR_C (1 << 27)
#define QH_EPCHAR_MPLEN_MASK 0x07FF0000
#define QH_EPCHAR_MPLEN_SH 16
#define QH_EPCHAR_H (1 << 15)
#define QH_EPCHAR_DTC (1 << 14)
#define QH_EPCHAR_EPS_MASK 0x00003000
#define QH_EPCHAR_EPS_SH 12
#define EHCI_QH_EPS_FULL 0
#define EHCI_QH_EPS_LOW 1
#define EHCI_QH_EPS_HIGH 2
#define EHCI_QH_EPS_RESERVED 3
#define QH_EPCHAR_EP_MASK 0x00000f00
#define QH_EPCHAR_EP_SH 8
#define QH_EPCHAR_I (1 << 7)
#define QH_EPCHAR_DEVADDR_MASK 0x0000007f
#define QH_EPCHAR_DEVADDR_SH 0
/* endpoint capabilities */
uint32_t epcap;
#define QH_EPCAP_MULT_MASK 0xc0000000
#define QH_EPCAP_MULT_SH 30
#define QH_EPCAP_PORTNUM_MASK 0x3f800000
#define QH_EPCAP_PORTNUM_SH 23
#define QH_EPCAP_HUBADDR_MASK 0x007f0000
#define QH_EPCAP_HUBADDR_SH 16
#define QH_EPCAP_CMASK_MASK 0x0000ff00
#define QH_EPCAP_CMASK_SH 8
#define QH_EPCAP_SMASK_MASK 0x000000ff
#define QH_EPCAP_SMASK_SH 0
uint32_t current_qtd; /* Standard next link pointer */
uint32_t next_qtd; /* Standard next link pointer */
uint32_t altnext_qtd;
#define QH_ALTNEXT_NAKCNT_MASK 0x0000001e
#define QH_ALTNEXT_NAKCNT_SH 1
uint32_t token; /* Same as QTD token */
uint32_t bufptr[5]; /* Standard buffer pointer */
#define BUFPTR_CPROGMASK_MASK 0x000000ff
#define BUFPTR_FRAMETAG_MASK 0x0000001f
#define BUFPTR_SBYTES_MASK 0x00000fe0
#define BUFPTR_SBYTES_SH 5
} EHCIqh;
/* EHCI spec version 1.0 Section 3.7
*/
typedef struct EHCIfstn {
uint32_t next; /* Standard next link pointer */
uint32_t backptr; /* Standard next link pointer */
} EHCIfstn;
enum async_state {
EHCI_ASYNC_NONE = 0,
EHCI_ASYNC_INITIALIZED,
EHCI_ASYNC_INFLIGHT,
EHCI_ASYNC_FINISHED,
};
struct EHCIPacket {
EHCIQueue *queue;
QTAILQ_ENTRY(EHCIPacket) next;
EHCIqtd qtd; /* copy of current QTD (being worked on) */
uint32_t qtdaddr; /* address QTD read from */
USBPacket packet;
QEMUSGList sgl;
int pid;
enum async_state async;
};
struct EHCIQueue {
EHCIState *ehci;
QTAILQ_ENTRY(EHCIQueue) next;
uint32_t seen;
uint64_t ts;
int async;
int transact_ctr;
/* cached data from guest - needs to be flushed
* when guest removes an entry (doorbell, handshake sequence)
*/
EHCIqh qh; /* copy of current QH (being worked on) */
uint32_t qhaddr; /* address QH read from */
uint32_t qtdaddr; /* address QTD read from */
USBDevice *dev;
QTAILQ_HEAD(pkts_head, EHCIPacket) packets;
};
typedef QTAILQ_HEAD(EHCIQueueHead, EHCIQueue) EHCIQueueHead;
struct EHCIState {
USBBus bus;
qemu_irq irq;
MemoryRegion mem;
DMAContext *dma;
MemoryRegion mem_caps;
MemoryRegion mem_opreg;
MemoryRegion mem_ports;
int companion_count;
uint16_t capsbase;
uint16_t opregbase;
/* properties */
uint32_t maxframes;
/*
* EHCI spec version 1.0 Section 2.3
* Host Controller Operational Registers
*/
uint8_t caps[CAPA_SIZE];
union {
uint32_t opreg[PORTSC_BEGIN/sizeof(uint32_t)];
struct {
uint32_t usbcmd;
uint32_t usbsts;
uint32_t usbintr;
uint32_t frindex;
uint32_t ctrldssegment;
uint32_t periodiclistbase;
uint32_t asynclistaddr;
uint32_t notused[9];
uint32_t configflag;
};
};
uint32_t portsc[NB_PORTS];
/*
* Internal states, shadow registers, etc
*/
QEMUTimer *frame_timer;
QEMUBH *async_bh;
uint32_t astate; /* Current state in asynchronous schedule */
uint32_t pstate; /* Current state in periodic schedule */
USBPort ports[NB_PORTS];
USBPort *companion_ports[NB_PORTS];
uint32_t usbsts_pending;
uint32_t usbsts_frindex;
EHCIQueueHead aqueues;
EHCIQueueHead pqueues;
/* which address to look at next */
uint32_t a_fetch_addr;
uint32_t p_fetch_addr;
USBPacket ipacket;
QEMUSGList isgl;
uint64_t last_run_ns;
uint32_t async_stepdown;
uint32_t periodic_sched_active;
bool int_req_by_async;
};
extern const VMStateDescription vmstate_ehci;
void usb_ehci_initfn(EHCIState *s, DeviceState *dev);
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