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[CPORTLIB]

Browse source 
Code formatting only.

svn path=/trunk/; revision=57759
This commit is contained in:
Hermès Bélusca-Maïto 2012-11-24 18:22:26 +00:00
parent 1279ab0e12
commit c5166c1a2d
3 changed files with 120 additions and 112 deletions
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4
reactos/include/reactos/drivers/serial/ns16550.h
View file

@ -11,8 +11,8 @@
#pragma once
/* Note: These definitions are the internal definitions used by Microsoft serial
driver (see src/kernel/serial/serial.h in WDK source code). Linux uses its own, as
do most other OS.
driver (see src/kernel/serial/serial.h in WDK source code). Linux uses its own,
as do most other OS.
*/
#if !defined(SERIAL_REGISTER_STRIDE)

62
reactos/include/reactos/libs/cportlib/cportlib.h
View file

@ -14,61 +14,63 @@
#define CP_GET_NODATA 1
#define CP_GET_ERROR 2
#define CPPORT_FLAG_MODEM_CONTROL 0x02
#define CPPORT_FLAG_MODEM_CONTROL 0x02
typedef struct _CPPORT
{
PUCHAR Address;
ULONG Baud;
USHORT Flags;
PUCHAR Address;
ULONG Baud;
USHORT Flags;
} CPPORT, *PCPPORT;
VOID
NTAPI
CpInitialize(
IN PCPPORT Port,
IN PUCHAR Address,
IN ULONG Rate
);
IN PCPPORT Port,
IN PUCHAR Address,
IN ULONG Rate
);
VOID
NTAPI
CpEnableFifo(
IN PUCHAR Address,
IN BOOLEAN Enable
);
IN PUCHAR Address,
IN BOOLEAN Enable
);
BOOLEAN
NTAPI
CpDoesPortExist(
IN PUCHAR Address
);
IN PUCHAR Address
);
UCHAR
NTAPI
CpReadLsr(
IN PCPPORT Port,
IN UCHAR ExpectedValue
);
IN PCPPORT Port,
IN UCHAR ExpectedValue
);
VOID
NTAPI
CpSetBaud(
IN PCPPORT Port,
IN ULONG Rate
);
IN PCPPORT Port,
IN ULONG Rate
);
USHORT
NTAPI
CpGetByte(
IN PCPPORT Port,
IN PUCHAR Byte,
IN BOOLEAN Wait,
IN BOOLEAN Poll
);
IN PCPPORT Port,
IN PUCHAR Byte,
IN BOOLEAN Wait,
IN BOOLEAN Poll
);
VOID
NTAPI
CpPutByte(
IN PCPPORT Port,
IN UCHAR Byte
);
IN PCPPORT Port,
IN UCHAR Byte
);
/* EOF */

166
reactos/lib/cportlib/cport.c
View file

@ -20,8 +20,8 @@
/* NOTE: The original code supports Modem Control. We currently do not */
/* FIXMEs:
- Make this serial-port specific (NS16550 vs other serial port types)
- Get x64 KDCOM, KDBG, FREELDR, and other current code to use this
- Make this serial-port specific (NS16550 vs other serial port types)
- Get x64 KDCOM, KDBG, FREELDR, and other current code to use this
*/
/* INCLUDES *******************************************************************/
@ -41,19 +41,19 @@ UCHAR RingIndicator;
VOID
NTAPI
CpInitialize(IN PCPPORT Port,
IN PUCHAR Address,
IN ULONG Rate)
IN PUCHAR Address,
IN ULONG Rate)
{
/* Reset port data */
/* Reset port data */
Port->Address = Address;
Port->Baud = 0;
/* Set the baud rate */
/* Set the baud rate */
CpSetBaud(Port, Rate);
/* Enable on DTR and RTS */
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER,
SERIAL_MCR_DTR | SERIAL_MCR_RTS);
SERIAL_MCR_DTR | SERIAL_MCR_RTS);
/* Disable interrupts */
WRITE_PORT_UCHAR(Address + INTERRUPT_ENABLE_REGISTER, 0);
@ -61,10 +61,10 @@ CpInitialize(IN PCPPORT Port,
VOID
NTAPI
CpEnableFifo(IN PUCHAR Address,
IN BOOLEAN Enable)
CpEnableFifo(IN PUCHAR Address,
IN BOOLEAN Enable)
{
/* Set FIFO */
/* Set FIFO */
WRITE_PORT_UCHAR(Address + FIFO_CONTROL_REGISTER, Enable ? SERIAL_FCR_ENABLE : 0);
}
@ -72,58 +72,62 @@ BOOLEAN
NTAPI
CpDoesPortExist(IN PUCHAR Address)
{
UCHAR Old;
/*
* See "Building Hardware and Firmware to Complement Microsoft Windows Headless Operation"
* Out-of-Band Management Port Device Requirements:
* The device must act as a 16550 or 16450 UART.
* Windows Server 2003 will test this device using the following process.
* 1. Save off the current modem status register.
* 2. Place the UART into diagnostic mode (The UART is placed into loopback mode
* by writing SERIAL_MCR_LOOP to the modem control register).
* 3. The modem status register is read and the high bits are checked. This means
* SERIAL_MSR_CTS, SERIAL_MSR_DSR, SERIAL_MSR_RI and SERIAL_MSR_DCD should
* all be clear.
* 4. Place the UART in diagnostic mode and turn on OUTPUT (Loopback Mode and
* OUTPUT are both turned on by writing (SERIAL_MCR_LOOP | SERIAL_MCR_OUT1)
* to the modem control register).
* 5. The modem status register is read and the ring indicator is checked.
* This means SERIAL_MSR_RI should be set.
* 6. Restore original modem status register.
*/
Old = READ_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER);
/*
* See "Building Hardware and Firmware to Complement Microsoft Windows Headless Operation"
* Out-of-Band Management Port Device Requirements:
* The device must act as a 16550 or 16450 UART.
* Windows Server 2003 will test this device using the following process:
* 1. Save off the current modem status register.
* 2. Place the UART into diagnostic mode (The UART is placed into loopback mode
* by writing SERIAL_MCR_LOOP to the modem control register).
* 3. The modem status register is read and the high bits are checked. This means
* SERIAL_MSR_CTS, SERIAL_MSR_DSR, SERIAL_MSR_RI and SERIAL_MSR_DCD should
* all be clear.
* 4. Place the UART in diagnostic mode and turn on OUTPUT (Loopback Mode and
* OUTPUT are both turned on by writing (SERIAL_MCR_LOOP | SERIAL_MCR_OUT1)
* to the modem control register).
* 5. The modem status register is read and the ring indicator is checked.
* This means SERIAL_MSR_RI should be set.
* 6. Restore original modem status register.
*/
UCHAR Old = READ_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER);
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER, SERIAL_MCR_LOOP);
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER, SERIAL_MCR_LOOP);
if (!(READ_PORT_UCHAR(Address + MODEM_STATUS_REGISTER) &
(SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_DCD)))
{
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER,
(SERIAL_MCR_OUT1 | SERIAL_MCR_LOOP));
if (READ_PORT_UCHAR(Address + MODEM_STATUS_REGISTER) & SERIAL_MSR_RI)
{
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER, Old);
return TRUE;
}
}
(SERIAL_MSR_CTS | SERIAL_MSR_DSR | SERIAL_MSR_RI | SERIAL_MSR_DCD)))
{
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER,
(SERIAL_MCR_OUT1 | SERIAL_MCR_LOOP));
if (READ_PORT_UCHAR(Address + MODEM_STATUS_REGISTER) & SERIAL_MSR_RI)
{
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER, Old);
return TRUE;
}
}
WRITE_PORT_UCHAR(Address + MODEM_CONTROL_REGISTER, Old);
return FALSE;
}
UCHAR
NTAPI
CpReadLsr(IN PCPPORT Port,
IN UCHAR ExpectedValue)
IN UCHAR ExpectedValue)
{
UCHAR Lsr, Msr;
UCHAR Lsr, Msr;
/* Read the LSR and check if the expected value is present */
/* Read the LSR and check if the expected value is present */
Lsr = READ_PORT_UCHAR(Port->Address + LINE_STATUS_REGISTER);
if (!(Lsr & ExpectedValue))
{
/* Check the MSR for ring indicator toggle */
{
/* Check the MSR for ring indicator toggle */
Msr = READ_PORT_UCHAR(Port->Address + MODEM_STATUS_REGISTER);
/* If the indicator reaches 3, we've seen this on/off twice */
/* If the indicator reaches 3, we've seen this on/off twice */
RingIndicator |= (Msr & SERIAL_MSR_RI) ? 1 : 2;
if (RingIndicator == 3) Port->Flags |= CPPORT_FLAG_MODEM_CONTROL;
}
@ -134,13 +138,13 @@ CpReadLsr(IN PCPPORT Port,
VOID
NTAPI
CpSetBaud(IN PCPPORT Port,
IN ULONG Rate)
IN ULONG Rate)
{
UCHAR Lcr;
USHORT Mode;
UCHAR Lcr;
USHORT Mode;
/* Add DLAB */
Lcr = READ_PORT_UCHAR(Port->Address + LINE_CONTROL_REGISTER);
Lcr = READ_PORT_UCHAR(Port->Address + LINE_CONTROL_REGISTER);
WRITE_PORT_UCHAR(Port->Address + LINE_CONTROL_REGISTER, Lcr | SERIAL_LCR_DLAB);
/* Set baud rate */
@ -150,59 +154,59 @@ CpSetBaud(IN PCPPORT Port,
/* Reset DLAB and set 8 data bits, 1 stop bit, no parity, no break */
WRITE_PORT_UCHAR(Port->Address + LINE_CONTROL_REGISTER,
SERIAL_8_DATA | SERIAL_1_STOP | SERIAL_NONE_PARITY);
SERIAL_8_DATA | SERIAL_1_STOP | SERIAL_NONE_PARITY);
/* Save baud rate in port */
/* Save baud rate in port */
Port->Baud = Rate;
}
USHORT
NTAPI
CpGetByte(IN PCPPORT Port,
IN PUCHAR Byte,
IN BOOLEAN Wait,
IN BOOLEAN Poll)
IN PUCHAR Byte,
IN BOOLEAN Wait,
IN BOOLEAN Poll)
{
UCHAR Lsr;
ULONG i;
UCHAR Lsr;
ULONG i;
/* Handle early read-before-init */
if (!Port->Address) return CP_GET_NODATA;
/* Handle early read-before-init */
if (!Port->Address) return CP_GET_NODATA;
/* If "wait" mode enabled, spin many times, otherwise attempt just once */
i = Wait ? 204800 : 1;
/* If "wait" mode enabled, spin many times, otherwise attempt just once */
i = Wait ? 204800 : 1;
while (i--)
{
/* Read LSR for data ready */
{
/* Read LSR for data ready */
Lsr = CpReadLsr(Port, SERIAL_LSR_DR);
if ((Lsr & SERIAL_LSR_DR) == SERIAL_LSR_DR)
{
/* If an error happened, clear the byte and fail */
{
/* If an error happened, clear the byte and fail */
if (Lsr & (SERIAL_LSR_FE | SERIAL_LSR_PE))
{
{
*Byte = 0;
return CP_GET_ERROR;
}
/* If only polling was requested by caller, return now */
/* If only polling was requested by caller, return now */
if (Poll) return CP_GET_SUCCESS;
/* Otherwise read the byte and return it */
/* Otherwise read the byte and return it */
*Byte = READ_PORT_UCHAR(Port->Address + RECEIVE_BUFFER_REGISTER);
/* Handle CD if port is in modem control mode */
/* Handle CD if port is in modem control mode */
if (Port->Flags & CPPORT_FLAG_MODEM_CONTROL)
{
/* Not implemented yet */
DPRINT1("CP: CPPORT_FLAG_MODEM_CONTROL unexpected\n");
{
/* Not implemented yet */
DPRINT1("CP: CPPORT_FLAG_MODEM_CONTROL unexpected\n");
}
/* Byte was read */
/* Byte was read */
return CP_GET_SUCCESS;
}
}
/* Reset LSR, no data was found */
/* Reset LSR, no data was found */
CpReadLsr(Port, 0);
return CP_GET_NODATA;
}
@ -210,18 +214,20 @@ CpGetByte(IN PCPPORT Port,
VOID
NTAPI
CpPutByte(IN PCPPORT Port,
IN UCHAR Byte)
IN UCHAR Byte)
{
/* Check if port is in modem control to handle CD */
/* Check if port is in modem control to handle CD */
while (Port->Flags & CPPORT_FLAG_MODEM_CONTROL)
{
/* Not implemented yet */
DPRINT1("CP: CPPORT_FLAG_MODEM_CONTROL unexpected\n");
{
/* Not implemented yet */
DPRINT1("CP: CPPORT_FLAG_MODEM_CONTROL unexpected\n");
}
/* Wait for LSR to say we can go ahead */
/* Wait for LSR to say we can go ahead */
while (!(CpReadLsr(Port, SERIAL_LSR_THRE) & SERIAL_LSR_THRE));
/* Send the byte */
WRITE_PORT_UCHAR(Port->Address + RECEIVE_BUFFER_REGISTER, Byte);
}
/* EOF */