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kvm tool: serial: Simplify switch cases

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There is no point to have the same switch case construct for all the
registers, just to take care of the oddball case of DLL/DLM.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Thomas Gleixner
2011-12-10 13:27:57 +00:00
committed by Will Deacon
parent d2ea115d82
commit c59fa0c4ef
1 changed files with 44 additions and 85 deletions
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hw/serial.c
+44 -85
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@@ -187,73 +187,48 @@ static bool serial8250_out(struct ioport *ioport, struct kvm *kvm, u16 port, voi
offset = port - dev->iobase;
if (dev->lcr & UART_LCR_DLAB) {
switch (offset) {
case UART_DLL:
dev->dll = ioport__read8(data);
break;
case UART_DLM:
dev->dlm = ioport__read8(data);
break;
case UART_FCR:
dev->fcr = ioport__read8(data);
break;
case UART_LCR:
dev->lcr = ioport__read8(data);
break;
case UART_MCR:
dev->mcr = ioport__read8(data);
break;
case UART_LSR:
/* Factory test */
break;
case UART_MSR:
/* Not used */
break;
case UART_SCR:
dev->scr = ioport__read8(data);
break;
default:
ret = false;
break;
}
} else {
switch (offset) {
case UART_TX: {
switch (offset) {
case UART_TX:
if (!(dev->lcr & UART_LCR_DLAB)) {
char *addr = data;
if (!(dev->mcr & UART_MCR_LOOP))
term_putc(CONSOLE_8250, addr, size, dev->id);
dev->iir = UART_IIR_NO_INT;
break;
} else {
dev->dll = ioport__read8(data);
}
case UART_FCR:
dev->fcr = ioport__read8(data);
break;
case UART_IER:
break;
case UART_IER:
if (!(dev->lcr & UART_LCR_DLAB)) {
dev->ier = ioport__read8(data) & 0x3f;
kvm__irq_line(kvm, dev->irq, dev->ier ? 1 : 0);
break;
case UART_LCR:
dev->lcr = ioport__read8(data);
break;
case UART_MCR:
dev->mcr = ioport__read8(data);
break;
case UART_LSR:
/* Factory test */
break;
case UART_MSR:
/* Not used */
break;
case UART_SCR:
dev->scr = ioport__read8(data);
break;
default:
ret = false;
break;
} else {
dev->dlm = ioport__read8(data);
}
break;
case UART_FCR:
dev->fcr = ioport__read8(data);
break;
case UART_LCR:
dev->lcr = ioport__read8(data);
break;
case UART_MCR:
dev->mcr = ioport__read8(data);
break;
case UART_LSR:
/* Factory test */
break;
case UART_MSR:
/* Not used */
break;
case UART_SCR:
dev->scr = ioport__read8(data);
break;
default:
ret = false;
break;
}
mutex_unlock(&dev->mutex);
@@ -275,37 +250,22 @@ static bool serial8250_in(struct ioport *ioport, struct kvm *kvm, u16 port, void
offset = port - dev->iobase;
if (dev->lcr & UART_LCR_DLAB) {
switch (offset) {
case UART_DLL:
switch (offset) {
case UART_RX:
if (dev->lcr & UART_LCR_DLAB) {
ioport__write8(data, dev->dll);
goto out_unlock;
case UART_DLM:
ioport__write8(data, dev->dlm);
goto out_unlock;
default:
break;
}
} else {
switch (offset) {
case UART_RX:
} else {
ioport__write8(data, dev->rbr);
dev->lsr &= ~UART_LSR_DR;
dev->iir = UART_IIR_NO_INT;
goto out_unlock;
case UART_IER:
ioport__write8(data, dev->ier);
goto out_unlock;
default:
break;
}
}
switch (offset) {
break;
case UART_IER:
if (dev->lcr & UART_LCR_DLAB)
ioport__write8(data, dev->dlm);
else
ioport__write8(data, dev->ier);
break;
case UART_IIR: {
u8 iir = dev->iir;
@@ -333,9 +293,8 @@ static bool serial8250_in(struct ioport *ioport, struct kvm *kvm, u16 port, void
break;
default:
ret = false;
goto out_unlock;
break;
}
out_unlock:
mutex_unlock(&dev->mutex);
return ret;