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qemu-patch-raspberry4/hw/usb/dev-serial.c
Thomas Huth 99761176ee usb: Remove legacy -usbdevice options (host, serial, disk and net) 
The option have been marked as deprecated since QEMU 2.10, and so far
nobody complained that the host, serial, disk and net options are urgently
required anymore. So let's now get rid at least of this legacy pile, to
simplify the usb code quite a bit.

This patch removes the usbdevices host, serial, disk and net. These devices
use their own complicated parameter parsing mechanisms, so they are just
ugly to maintain, without real benefit for the users (the users can use the
corresponding "-device" parameters instead which have the same complexity
as the "-usbdevice" devices here).

Note that the other rather simple -usbdevice options (mouse, tablet, etc.)
are not removed yet (the code is really simple here, so it does not hurt
much to keep it), as well as the two devices "braille" and "bt" which are
easier to use with -usbdevice than with -device.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-id: 1515519171-20315-1-git-send-email-thuth@redhat.com

[kraxel] delete some usb_host_device_open() leftovers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
2018-01-26 07:15:08 +01:00

603 lines
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/*
* FTDI FT232BM Device emulation
*
* Copyright (c) 2006 CodeSourcery.
* Copyright (c) 2008 Samuel Thibault <samuel.thibault@ens-lyon.org>
* Written by Paul Brook, reused for FTDI by Samuel Thibault
*
* This code is licensed under the LGPL.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "qemu/cutils.h"
#include "qemu/error-report.h"
#include "hw/usb.h"
#include "hw/usb/desc.h"
#include "chardev/char-serial.h"
#include "chardev/char-fe.h"
//#define DEBUG_Serial
#ifdef DEBUG_Serial
#define DPRINTF(fmt, ...) \
do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define RECV_BUF 384
/* Commands */
#define FTDI_RESET 0
#define FTDI_SET_MDM_CTRL 1
#define FTDI_SET_FLOW_CTRL 2
#define FTDI_SET_BAUD 3
#define FTDI_SET_DATA 4
#define FTDI_GET_MDM_ST 5
#define FTDI_SET_EVENT_CHR 6
#define FTDI_SET_ERROR_CHR 7
#define FTDI_SET_LATENCY 9
#define FTDI_GET_LATENCY 10
#define DeviceOutVendor ((USB_DIR_OUT|USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
#define DeviceInVendor ((USB_DIR_IN |USB_TYPE_VENDOR|USB_RECIP_DEVICE)<<8)
/* RESET */
#define FTDI_RESET_SIO 0
#define FTDI_RESET_RX 1
#define FTDI_RESET_TX 2
/* SET_MDM_CTRL */
#define FTDI_DTR 1
#define FTDI_SET_DTR (FTDI_DTR << 8)
#define FTDI_RTS 2
#define FTDI_SET_RTS (FTDI_RTS << 8)
/* SET_FLOW_CTRL */
#define FTDI_RTS_CTS_HS 1
#define FTDI_DTR_DSR_HS 2
#define FTDI_XON_XOFF_HS 4
/* SET_DATA */
#define FTDI_PARITY (0x7 << 8)
#define FTDI_ODD (0x1 << 8)
#define FTDI_EVEN (0x2 << 8)
#define FTDI_MARK (0x3 << 8)
#define FTDI_SPACE (0x4 << 8)
#define FTDI_STOP (0x3 << 11)
#define FTDI_STOP1 (0x0 << 11)
#define FTDI_STOP15 (0x1 << 11)
#define FTDI_STOP2 (0x2 << 11)
/* GET_MDM_ST */
/* TODO: should be sent every 40ms */
#define FTDI_CTS (1<<4) // CTS line status
#define FTDI_DSR (1<<5) // DSR line status
#define FTDI_RI (1<<6) // RI line status
#define FTDI_RLSD (1<<7) // Receive Line Signal Detect
/* Status */
#define FTDI_DR (1<<0) // Data Ready
#define FTDI_OE (1<<1) // Overrun Err
#define FTDI_PE (1<<2) // Parity Err
#define FTDI_FE (1<<3) // Framing Err
#define FTDI_BI (1<<4) // Break Interrupt
#define FTDI_THRE (1<<5) // Transmitter Holding Register
#define FTDI_TEMT (1<<6) // Transmitter Empty
#define FTDI_FIFO (1<<7) // Error in FIFO
typedef struct {
USBDevice dev;
uint8_t recv_buf[RECV_BUF];
uint16_t recv_ptr;
uint16_t recv_used;
uint8_t event_chr;
uint8_t error_chr;
uint8_t event_trigger;
QEMUSerialSetParams params;
int latency; /* ms */
CharBackend cs;
} USBSerialState;
#define TYPE_USB_SERIAL "usb-serial-dev"
#define USB_SERIAL_DEV(obj) OBJECT_CHECK(USBSerialState, (obj), TYPE_USB_SERIAL)
enum {
STR_MANUFACTURER = 1,
STR_PRODUCT_SERIAL,
STR_PRODUCT_BRAILLE,
STR_SERIALNUMBER,
};
static const USBDescStrings desc_strings = {
[STR_MANUFACTURER] = "QEMU",
[STR_PRODUCT_SERIAL] = "QEMU USB SERIAL",
[STR_PRODUCT_BRAILLE] = "QEMU USB BAUM BRAILLE",
[STR_SERIALNUMBER] = "1",
};
static const USBDescIface desc_iface0 = {
.bInterfaceNumber = 0,
.bNumEndpoints = 2,
.bInterfaceClass = 0xff,
.bInterfaceSubClass = 0xff,
.bInterfaceProtocol = 0xff,
.eps = (USBDescEndpoint[]) {
{
.bEndpointAddress = USB_DIR_IN | 0x01,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},{
.bEndpointAddress = USB_DIR_OUT | 0x02,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize = 64,
},
}
};
static const USBDescDevice desc_device = {
.bcdUSB = 0x0200,
.bMaxPacketSize0 = 8,
.bNumConfigurations = 1,
.confs = (USBDescConfig[]) {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.bmAttributes = USB_CFG_ATT_ONE,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface0,
},
},
};
static const USBDesc desc_serial = {
.id = {
.idVendor = 0x0403,
.idProduct = 0x6001,
.bcdDevice = 0x0400,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_SERIAL,
.iSerialNumber = STR_SERIALNUMBER,
},
.full = &desc_device,
.str = desc_strings,
};
static const USBDesc desc_braille = {
.id = {
.idVendor = 0x0403,
.idProduct = 0xfe72,
.bcdDevice = 0x0400,
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT_BRAILLE,
.iSerialNumber = STR_SERIALNUMBER,
},
.full = &desc_device,
.str = desc_strings,
};
static void usb_serial_reset(USBSerialState *s)
{
/* TODO: Set flow control to none */
s->event_chr = 0x0d;
s->event_trigger = 0;
s->recv_ptr = 0;
s->recv_used = 0;
/* TODO: purge in char driver */
}
static void usb_serial_handle_reset(USBDevice *dev)
{
USBSerialState *s = (USBSerialState *)dev;
DPRINTF("Reset\n");
usb_serial_reset(s);
/* TODO: Reset char device, send BREAK? */
}
static uint8_t usb_get_modem_lines(USBSerialState *s)
{
int flags;
uint8_t ret;
if (qemu_chr_fe_ioctl(&s->cs,
CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) {
return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
}
ret = 0;
if (flags & CHR_TIOCM_CTS)
ret |= FTDI_CTS;
if (flags & CHR_TIOCM_DSR)
ret |= FTDI_DSR;
if (flags & CHR_TIOCM_RI)
ret |= FTDI_RI;
if (flags & CHR_TIOCM_CAR)
ret |= FTDI_RLSD;
return ret;
}
static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
int request, int value, int index, int length, uint8_t *data)
{
USBSerialState *s = (USBSerialState *)dev;
int ret;
DPRINTF("got control %x, value %x\n",request, value);
ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
if (ret >= 0) {
return;
}
switch (request) {
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
break;
/* Class specific requests. */
case DeviceOutVendor | FTDI_RESET:
switch (value) {
case FTDI_RESET_SIO:
usb_serial_reset(s);
break;
case FTDI_RESET_RX:
s->recv_ptr = 0;
s->recv_used = 0;
/* TODO: purge from char device */
break;
case FTDI_RESET_TX:
/* TODO: purge from char device */
break;
}
break;
case DeviceOutVendor | FTDI_SET_MDM_CTRL:
{
static int flags;
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
if (value & FTDI_SET_RTS) {
if (value & FTDI_RTS)
flags |= CHR_TIOCM_RTS;
else
flags &= ~CHR_TIOCM_RTS;
}
if (value & FTDI_SET_DTR) {
if (value & FTDI_DTR)
flags |= CHR_TIOCM_DTR;
else
flags &= ~CHR_TIOCM_DTR;
}
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
break;
}
case DeviceOutVendor | FTDI_SET_FLOW_CTRL:
/* TODO: ioctl */
break;
case DeviceOutVendor | FTDI_SET_BAUD: {
static const int subdivisors8[8] = { 0, 4, 2, 1, 3, 5, 6, 7 };
int subdivisor8 = subdivisors8[((value & 0xc000) >> 14)
| ((index & 1) << 2)];
int divisor = value & 0x3fff;
/* chip special cases */
if (divisor == 1 && subdivisor8 == 0)
subdivisor8 = 4;
if (divisor == 0 && subdivisor8 == 0)
divisor = 1;
s->params.speed = (48000000 / 2) / (8 * divisor + subdivisor8);
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
break;
}
case DeviceOutVendor | FTDI_SET_DATA:
switch (value & FTDI_PARITY) {
case 0:
s->params.parity = 'N';
break;
case FTDI_ODD:
s->params.parity = 'O';
break;
case FTDI_EVEN:
s->params.parity = 'E';
break;
default:
DPRINTF("unsupported parity %d\n", value & FTDI_PARITY);
goto fail;
}
switch (value & FTDI_STOP) {
case FTDI_STOP1:
s->params.stop_bits = 1;
break;
case FTDI_STOP2:
s->params.stop_bits = 2;
break;
default:
DPRINTF("unsupported stop bits %d\n", value & FTDI_STOP);
goto fail;
}
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_PARAMS, &s->params);
/* TODO: TX ON/OFF */
break;
case DeviceInVendor | FTDI_GET_MDM_ST:
data[0] = usb_get_modem_lines(s) | 1;
data[1] = 0;
p->actual_length = 2;
break;
case DeviceOutVendor | FTDI_SET_EVENT_CHR:
/* TODO: handle it */
s->event_chr = value;
break;
case DeviceOutVendor | FTDI_SET_ERROR_CHR:
/* TODO: handle it */
s->error_chr = value;
break;
case DeviceOutVendor | FTDI_SET_LATENCY:
s->latency = value;
break;
case DeviceInVendor | FTDI_GET_LATENCY:
data[0] = s->latency;
p->actual_length = 1;
break;
default:
fail:
DPRINTF("got unsupported/bogus control %x, value %x\n", request, value);
p->status = USB_RET_STALL;
break;
}
}
static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
{
USBSerialState *s = (USBSerialState *)dev;
uint8_t devep = p->ep->nr;
struct iovec *iov;
uint8_t header[2];
int i, first_len, len;
switch (p->pid) {
case USB_TOKEN_OUT:
if (devep != 2)
goto fail;
for (i = 0; i < p->iov.niov; i++) {
iov = p->iov.iov + i;
/* XXX this blocks entire thread. Rewrite to use
* qemu_chr_fe_write and background I/O callbacks */
qemu_chr_fe_write_all(&s->cs, iov->iov_base, iov->iov_len);
}
p->actual_length = p->iov.size;
break;
case USB_TOKEN_IN:
if (devep != 1)
goto fail;
first_len = RECV_BUF - s->recv_ptr;
len = p->iov.size;
if (len <= 2) {
p->status = USB_RET_NAK;
break;
}
header[0] = usb_get_modem_lines(s) | 1;
/* We do not have the uart details */
/* handle serial break */
if (s->event_trigger && s->event_trigger & FTDI_BI) {
s->event_trigger &= ~FTDI_BI;
header[1] = FTDI_BI;
usb_packet_copy(p, header, 2);
break;
} else {
header[1] = 0;
}
len -= 2;
if (len > s->recv_used)
len = s->recv_used;
if (!len) {
p->status = USB_RET_NAK;
break;
}
if (first_len > len)
first_len = len;
usb_packet_copy(p, header, 2);
usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
if (len > first_len)
usb_packet_copy(p, s->recv_buf, len - first_len);
s->recv_used -= len;
s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
break;
default:
DPRINTF("Bad token\n");
fail:
p->status = USB_RET_STALL;
break;
}
}
static int usb_serial_can_read(void *opaque)
{
USBSerialState *s = opaque;
if (!s->dev.attached) {
return 0;
}
return RECV_BUF - s->recv_used;
}
static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
{
USBSerialState *s = opaque;
int first_size, start;
/* room in the buffer? */
if (size > (RECV_BUF - s->recv_used))
size = RECV_BUF - s->recv_used;
start = s->recv_ptr + s->recv_used;
if (start < RECV_BUF) {
/* copy data to end of buffer */
first_size = RECV_BUF - start;
if (first_size > size)
first_size = size;
memcpy(s->recv_buf + start, buf, first_size);
/* wrap around to front if needed */
if (size > first_size)
memcpy(s->recv_buf, buf + first_size, size - first_size);
} else {
start -= RECV_BUF;
memcpy(s->recv_buf + start, buf, size);
}
s->recv_used += size;
}
static void usb_serial_event(void *opaque, int event)
{
USBSerialState *s = opaque;
switch (event) {
case CHR_EVENT_BREAK:
s->event_trigger |= FTDI_BI;
break;
case CHR_EVENT_OPENED:
if (!s->dev.attached) {
usb_device_attach(&s->dev, &error_abort);
}
break;
case CHR_EVENT_CLOSED:
if (s->dev.attached) {
usb_device_detach(&s->dev);
}
break;
}
}
static void usb_serial_realize(USBDevice *dev, Error **errp)
{
USBSerialState *s = USB_SERIAL_DEV(dev);
Error *local_err = NULL;
usb_desc_create_serial(dev);
usb_desc_init(dev);
dev->auto_attach = 0;
if (!qemu_chr_fe_backend_connected(&s->cs)) {
error_setg(errp, "Property chardev is required");
return;
}
usb_check_attach(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
qemu_chr_fe_set_handlers(&s->cs, usb_serial_can_read, usb_serial_read,
usb_serial_event, NULL, s, NULL, true);
usb_serial_handle_reset(dev);
if (qemu_chr_fe_backend_open(&s->cs) && !dev->attached) {
usb_device_attach(dev, &error_abort);
}
}
static USBDevice *usb_braille_init(USBBus *bus, const char *unused)
{
USBDevice *dev;
Chardev *cdrv;
cdrv = qemu_chr_new("braille", "braille");
if (!cdrv)
return NULL;
dev = usb_create(bus, "usb-braille");
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);
return dev;
}
static const VMStateDescription vmstate_usb_serial = {
.name = "usb-serial",
.unmigratable = 1,
};
static Property serial_properties[] = {
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_serial_dev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->realize = usb_serial_realize;
uc->handle_reset = usb_serial_handle_reset;
uc->handle_control = usb_serial_handle_control;
uc->handle_data = usb_serial_handle_data;
dc->vmsd = &vmstate_usb_serial;
set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
}
static const TypeInfo usb_serial_dev_type_info = {
.name = TYPE_USB_SERIAL,
.parent = TYPE_USB_DEVICE,
.instance_size = sizeof(USBSerialState),
.abstract = true,
.class_init = usb_serial_dev_class_init,
};
static void usb_serial_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->product_desc = "QEMU USB Serial";
uc->usb_desc = &desc_serial;
dc->props = serial_properties;
}
static const TypeInfo serial_info = {
.name = "usb-serial",
.parent = TYPE_USB_SERIAL,
.class_init = usb_serial_class_initfn,
};
static Property braille_properties[] = {
DEFINE_PROP_CHR("chardev", USBSerialState, cs),
DEFINE_PROP_END_OF_LIST(),
};
static void usb_braille_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
uc->product_desc = "QEMU USB Braille";
uc->usb_desc = &desc_braille;
dc->props = braille_properties;
}
static const TypeInfo braille_info = {
.name = "usb-braille",
.parent = TYPE_USB_SERIAL,
.class_init = usb_braille_class_initfn,
};
static void usb_serial_register_types(void)
{
type_register_static(&usb_serial_dev_type_info);
type_register_static(&serial_info);
type_register_static(&braille_info);
usb_legacy_register("usb-braille", "braille", usb_braille_init);
}
type_init(usb_serial_register_types)
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