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Various coding style and cosmetic fixes (trivial).

Browse source 
Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@509 f3766cd6-281f-0410-b1cd-43a5c92072e9
This commit is contained in:
Uwe Hermann 2007-10-31 02:40:17 +00:00
commit f05e9a7d8a
2 changed files with 73 additions and 59 deletions
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118
device/pnp_raw.c
View file

@ -24,78 +24,92 @@
#include <device/pnp.h>
#include <io.h>
/* very low level pnp manipulation intended for stage 0 or 1 */
/* Very low-level PNP functions, mostly intended for stage 0 or 1 */
/**
* rawpnp_enter_ext_funct -- Enter the PNP extended functions,
* i.e. configuration mode
* @param dev The device IO port.
*/
void rawpnp_enter_ext_func_mode(u16 dev)
* Enter the PNP extended function mode (a.k.a. "MB PnP" or "config" mode).
*
* @param port The device I/O port.
*/
void rawpnp_enter_ext_func_mode(u16 port)
{
outb(0x87, dev);
outb(0x87, dev);
outb(0x87, port);
outb(0x87, port);
}
/**
* Exit the PNP extended functions, i.e. configuration mode
* @param dev The device IO port.
*/
void rawpnp_exit_ext_func_mode(u16 dev)
* Exit the PNP extended function mode (a.k.a. "MB PnP" or "config" mode).
*
* @param dev The device IO port.
*/
void rawpnp_exit_ext_func_mode(u16 port)
{
outb(0xaa, dev);
outb(0xaa, port);
}
/**
* Write a pnp configuration register. This is done by writing
* the register number to the port, and the value to the
* port+1
* @param dev The device IO port.
* @param reg The register number
* @param value The new value.
*/
void rawpnp_write_config(u16 dev, u8 reg, u8 value)
* Write an 8 bit value into a PNP configuration register.
*
* This is done by writing the register number to the port, and the value
* into port + 1. This code assumes that the data port is always the
* config-port plus 1, but luckily this is true for pretty much all devices.
*
* @param port The device I/O port.
* @param reg The register number.
* @param value The value to write into the specified register.
*/
void rawpnp_write_config(u16 port, u8 reg, u8 value)
{
outb(reg, dev);
outb(value,dev + 1);
outb(reg, port);
outb(value, port + 1);
}
/**
* Select a logical device. PNP has up to 16 logical devices.
* They are selected by writing the device # to register 7.
* @param dev The device IO port.
* @param which Which device
*/
void rawpnp_set_logical_device(u16 dev, u8 which)
* Select a logical device.
*
* PNP has up to 16 logical devices. They are selected by writing the
* logical device number (LDN) to register 0x07.
*
* @param dev The device I/O port.
* @param ldn The logical device (number) which should be selected.
*/
void rawpnp_set_logical_device(u16 port, u8 ldn)
{
rawpnp_write_config(dev, 0x07, which);
rawpnp_write_config(port, 0x07, ldn);
}
/**
* Set the enable for the device. The enable is at register 30.
* Setting the low bit enables the device.
* Code must have selected the proper device using
* rawpnp_set_logical_device. If enable is non-zero, device
* is enabled. If enable is zero, device is disabled.
* @param dev The device IO port.
* @param enable non-zero enables the device
*/
void rawpnp_set_enable(u16 dev, int enable)
* Set the enable for the logical device.
*
* The enable is at register 0x30. Setting bit zero enables the device.
* Code must have selected the proper logical device number (LDN) using
* rawpnp_set_logical_device() beforehand. If enable is non-zero, the device
* is enabled. If enable is zero, the device is disabled.
*
* @param port The device I/O port.
* @param enable Non-zero enables the device, zero disables it.
*/
void rawpnp_set_enable(u16 port, int enable)
{
rawpnp_write_config(dev, 0x30, enable ? 0x1 : 0x0);
rawpnp_write_config(port, 0x30, enable ? 0x1 : 0x0);
}
/**
* Set the iobase for the device. The iobase is at registers 'index'
* and 'index + 1', since these are 8 bit registers and iobase is 16 bits.
* Code must have selected the proper device using
* rawpnp_set_logical_device.
* @param dev The device IO port.
* @param iobase The 16 bit iobase
*/
void rawpnp_set_iobase(u16 dev, u8 index, u16 iobase)
* Set the I/O base for the device.
*
* The I/O base is at registers 'index' and 'index + 1', since these are
* 8 bit registers and the I/O base is 16 bits. Typical values for 'index'
* are 0x60 or 0x62.
*
* Code must have selected the proper logical device (LDN) using
* rawpnp_set_logical_device() beforehand.
*
* @param port The device I/O port.
* @param index The index port.
* @param iobase The 16 bit I/O base.
*/
void rawpnp_set_iobase(u16 port, u8 index, u16 iobase)
{
/* Index == 0x60 or 0x62 */
rawpnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
rawpnp_write_config(dev, index + 1, iobase & 0xff);
rawpnp_write_config(port, index + 0, (iobase >> 8) & 0xff); /* MSB */
rawpnp_write_config(port, index + 1, iobase & 0xff); /* LSB */
}

14
include/device/pnp.h
View file

@ -23,13 +23,13 @@
#include <types.h>
#include <device/device.h>
/* very low level pnp manipulation intended for stage 0 or 1 */
void rawpnp_enter_ext_func_mode(u16 dev);
void rawpnp_exit_ext_func_mode(u16 dev);
void rawpnp_write_config(u16 dev, u8 reg, u8 value);
void rawpnp_set_logical_device(u16 dev, u8 which);
void rawpnp_set_enable(u16 dev, int enable);
void rawpnp_set_iobase(u16 dev, u8 index, u16 iobase);
/* Very low-level PNP functions, mostly intended for stage 0 or 1 */
void rawpnp_enter_ext_func_mode(u16 port);
void rawpnp_exit_ext_func_mode(u16 port);
void rawpnp_write_config(u16 port, u8 reg, u8 value);
void rawpnp_set_logical_device(u16 port, u8 ldn);
void rawpnp_set_enable(u16 port, int enable);
void rawpnp_set_iobase(u16 port, u8 index, u16 iobase);
/* Primitive pnp resource manipulation */
void pnp_write_config(struct device * dev, u8 reg, u8 value);