diff options
Diffstat (limited to 'src/superio/smsc/lpc47n227/lpc47n227_early_serial.c')
| -rw-r--r-- | src/superio/smsc/lpc47n227/lpc47n227_early_serial.c | 85 |
1 files changed, 39 insertions, 46 deletions
diff --git a/src/superio/smsc/lpc47n227/lpc47n227_early_serial.c b/src/superio/smsc/lpc47n227/lpc47n227_early_serial.c index c6527d1ba6..318f0f3541 100644 --- a/src/superio/smsc/lpc47n227/lpc47n227_early_serial.c +++ b/src/superio/smsc/lpc47n227/lpc47n227_early_serial.c @@ -23,38 +23,34 @@ #include <arch/romcc_io.h> #include "lpc47n227.h" -//---------------------------------------------------------------------------------- -// Function: pnp_enter_conf_state -// Parameters: dev - high 8 bits = Super I/O port -// Return Value: None -// Description: Enable access to the LPC47N227's configuration registers. -// +/** + * Enable access to the LPC47N227's configuration registers. + * + * @param dev High 8 bits = Super I/O port. + */ static inline void pnp_enter_conf_state(device_t dev) { unsigned port = dev >> 8; outb(0x55, port); } -//---------------------------------------------------------------------------------- -// Function: pnp_exit_conf_state -// Parameters: dev - high 8 bits = Super I/O port -// Return Value: None -// Description: Disable access to the LPC47N227's configuration registers. -// +/** + * Disable access to the LPC47N227's configuration registers. + * + * @param dev High 8 bits = Super I/O port. + */ static void pnp_exit_conf_state(device_t dev) { unsigned port = dev >> 8; outb(0xaa, port); } -//---------------------------------------------------------------------------------- -// Function: lpc47n227_pnp_set_iobase -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n227.h) -// iobase - base I/O port for the logical device -// Return Value: None -// Description: Program the base I/O port for the specified logical device. -// +/** + * Program the base I/O port for the specified logical device. + * + * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number. + * @param iobase Base I/O port for the logical device. + */ void lpc47n227_pnp_set_iobase(device_t dev, unsigned iobase) { // LPC47N227 requires base ports to be a multiple of 4 @@ -78,20 +74,18 @@ void lpc47n227_pnp_set_iobase(device_t dev, unsigned iobase) } } -//---------------------------------------------------------------------------------- -// Function: lpc47n227_pnp_set_enable -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n227.h) -// enable - 0 to disable, anythig else to enable -// Return Value: None -// Description: Enable or disable the specified logical device. -// Technically, a full disable requires setting the device's base -// I/O port below 0x100. We don't do that here, because we don't -// have access to a data structure that specifies what the 'real' -// base port is (when asked to enable the device). Also the function -// is used only to disable the device while its true base port is -// programmed (see lpc47n227_enable_serial() below). -// +/** + * Enable or disable the specified logical device. + * + * Technically, a full disable requires setting the device's base I/O port + * below 0x100. We don't do that here, because we don't have access to a data + * structure that specifies what the 'real' base port is (when asked to enable + * the device). Also the function is used only to disable the device while its + * true base port is programmed (see lpc47n227_enable_serial() below). + * + * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number. + * @param enable 0 to disable, anythig else to enable. + */ void lpc47n227_pnp_set_enable(device_t dev, int enable) { uint8_t power_register = 0; @@ -128,20 +122,19 @@ void lpc47n227_pnp_set_enable(device_t dev, int enable) pnp_write_config(dev, power_register, new_power); } -//---------------------------------------------------------------------------------- -// Function: lpc47n227_enable_serial -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n227.h) -// iobase - processor I/O port address to assign to this serial device -// Return Value: bool -// Description: Configure the base I/O port of the specified serial device -// and enable the serial device. -// +/** + * Configure the base I/O port of the specified serial device and enable the + * serial device. + * + * @param dev High 8 bits = Super I/O port, low 8 bits = logical device number. + * @param iobase Processor I/O port address to assign to this serial device. + */ static void lpc47n227_enable_serial(device_t dev, unsigned iobase) { - // NOTE: Cannot use pnp_set_XXX() here because they assume chip - // support for logical devices, which the LPC47N227 doesn't have - + /* + * NOTE: Cannot use pnp_set_XXX() here because they assume chip + * support for logical devices, which the LPC47N227 doesn't have. + */ pnp_enter_conf_state(dev); lpc47n227_pnp_set_enable(dev, 0); lpc47n227_pnp_set_iobase(dev, iobase); |