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dev-serial: style changes to improve readability and checkpatch fixes 

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-id: 20201027150456.24606-2-mark.cave-ayland@ilande.co.uk
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Mark Cave-Ayland 2020-10-27 15:04:49 +00:00 committed by Gerd Hoffmann
parent 3d6e32347a
commit adab8d48cf
1 changed files with 125 additions and 103 deletions
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228
hw/usb/dev-serial.c
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@ -33,72 +33,75 @@ do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
#define RECV_BUF (512 - (2 * 8))
/* 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 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)
#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
#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)
#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
#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_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)
#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
#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
#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 */
struct USBSerialState {
USBDevice dev;
USBEndpoint *intr;
uint8_t recv_buf[RECV_BUF];
uint16_t recv_ptr;
@ -216,29 +219,34 @@ static uint8_t usb_get_modem_lines(USBSerialState *s)
if (qemu_chr_fe_ioctl(&s->cs,
CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) {
return FTDI_CTS|FTDI_DSR|FTDI_RLSD;
return FTDI_CTS | FTDI_DSR | FTDI_RLSD;
}
ret = 0;
if (flags & CHR_TIOCM_CTS)
if (flags & CHR_TIOCM_CTS) {
ret |= FTDI_CTS;
if (flags & CHR_TIOCM_DSR)
}
if (flags & CHR_TIOCM_DSR) {
ret |= FTDI_DSR;
if (flags & CHR_TIOCM_RI)
}
if (flags & CHR_TIOCM_RI) {
ret |= FTDI_RI;
if (flags & CHR_TIOCM_CAR)
}
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)
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);
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;
@ -248,7 +256,7 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
case EndpointOutRequest | USB_REQ_CLEAR_FEATURE:
break;
/* Class specific requests. */
/* Class specific requests. */
case DeviceOutVendor | FTDI_RESET:
switch (value) {
case FTDI_RESET_SIO:
@ -269,16 +277,18 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
static int flags;
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
if (value & FTDI_SET_RTS) {
if (value & FTDI_RTS)
if (value & FTDI_RTS) {
flags |= CHR_TIOCM_RTS;
else
} else {
flags &= ~CHR_TIOCM_RTS;
}
}
if (value & FTDI_SET_DTR) {
if (value & FTDI_DTR)
if (value & FTDI_DTR) {
flags |= CHR_TIOCM_DTR;
else
} else {
flags &= ~CHR_TIOCM_DTR;
}
}
qemu_chr_fe_ioctl(&s->cs, CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
break;
@ -293,10 +303,12 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
int divisor = value & 0x3fff;
/* chip special cases */
if (divisor == 1 && subdivisor8 == 0)
if (divisor == 1 && subdivisor8 == 0) {
subdivisor8 = 4;
if (divisor == 0 && subdivisor8 == 0)
}
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);
@ -304,30 +316,32 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
}
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;
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;
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;
@ -423,20 +437,24 @@ static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
switch (p->pid) {
case USB_TOKEN_OUT:
if (devep != 2)
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 */
/*
* 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)
if (devep != 1) {
goto fail;
}
usb_serial_token_in(s, p);
break;
@ -464,21 +482,24 @@ static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
int first_size, start;
/* room in the buffer? */
if (size > (RECV_BUF - s->recv_used))
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)
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)
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);
@ -493,23 +514,23 @@ static void usb_serial_event(void *opaque, QEMUChrEvent 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;
case CHR_EVENT_MUX_IN:
case CHR_EVENT_MUX_OUT:
/* Ignore */
break;
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;
case CHR_EVENT_MUX_IN:
case CHR_EVENT_MUX_OUT:
/* Ignore */
break;
}
}
@ -549,8 +570,9 @@ static USBDevice *usb_braille_init(const char *unused)
Chardev *cdrv;
cdrv = qemu_chr_new("braille", "braille", NULL);
if (!cdrv)
if (!cdrv) {
return NULL;
}
dev = usb_new("usb-braille");
qdev_prop_set_chr(&dev->qdev, "chardev", cdrv);