diff options
Diffstat (limited to 'src/superio/smsc/lpc47n217/lpc47n217_early_serial.c')
| -rw-r--r-- | src/superio/smsc/lpc47n217/lpc47n217_early_serial.c | 131 |
1 files changed, 67 insertions, 64 deletions
diff --git a/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c b/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c index f60dbcffe1..2b0c634bcf 100644 --- a/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c +++ b/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c @@ -24,123 +24,126 @@ #include <assert.h> #include "lpc47n217.h" -//---------------------------------------------------------------------------------- -// Function: pnp_enter_conf_state -// Parameters: dev - high 8 bits = Super I/O port -// Return Value: None -// Description: Enable access to the LPC47N217's configuration registers. -// -static inline void pnp_enter_conf_state(device_t dev) { +/* + * Function: pnp_enter_conf_state + * Parameters: dev - high 8 bits = Super I/O port + * Return Value: None + * Description: Enable access to the LPC47N217's configuration registers. + */ +static inline void pnp_enter_conf_state(device_t dev) +{ unsigned port = dev>>8; - outb(0x55, port); + 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 LPC47N217's configuration registers. -// -static void pnp_exit_conf_state(device_t dev) { +/* + * Function: pnp_exit_conf_state + * Parameters: dev - high 8 bits = Super I/O port + * Return Value: None + * Description: Disable access to the LPC47N217's configuration registers. + */ +static void pnp_exit_conf_state(device_t dev) +{ unsigned port = dev>>8; - outb(0xaa, port); + outb(0xaa, port); } -//---------------------------------------------------------------------------------- -// Function: lpc47n217_pnp_set_iobase -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n217.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. -// +/* + * Function: lpc47n217_pnp_set_iobase + * Parameters: dev - high 8 bits = Super I/O port, + * low 8 bits = logical device number (per lpc47n217.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. + * + */ void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase) { - // LPC47N217 requires base ports to be a multiple of 4 + /* LPC47N217 requires base ports to be a multiple of 4 */ ASSERT(!(iobase & 0x3)); switch(dev & 0xFF) { - case LPC47N217_PP: + case LPC47N217_PP: pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff); break; - - case LPC47N217_SP1: + + case LPC47N217_SP1: pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff); break; - + case LPC47N217_SP2: pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff); break; - + default: break; } } -//---------------------------------------------------------------------------------- -// Function: lpc47n217_pnp_set_enable -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n217.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 lpc47n217_enable_serial() below). -// +/* + * Function: lpc47n217_pnp_set_enable + * Parameters: dev - high 8 bits = Super I/O port, + * low 8 bits = logical device number (per lpc47n217.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 lpc47n217_enable_serial() below). + */ void lpc47n217_pnp_set_enable(device_t dev, int enable) { uint8_t power_register = 0; uint8_t power_mask = 0; uint8_t current_power; uint8_t new_power; - + switch(dev & 0xFF) { - case LPC47N217_PP: + case LPC47N217_PP: power_register = 0x01; power_mask = 0x04; break; - - case LPC47N217_SP1: + + case LPC47N217_SP1: power_register = 0x02; power_mask = 0x08; break; - + case LPC47N217_SP2: power_register = 0x02; power_mask = 0x80; break; - + default: return; } current_power = pnp_read_config(dev, power_register); - new_power = current_power & ~power_mask; // disable by default + new_power = current_power & ~power_mask; /* disable by default */ if (enable) - new_power |= power_mask; // Enable + new_power |= power_mask; /* Enable */ pnp_write_config(dev, power_register, new_power); } -//---------------------------------------------------------------------------------- -// Function: lpc47n217_enable_serial -// Parameters: dev - high 8 bits = Super I/O port, -// low 8 bits = logical device number (per lpc47n217.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. -// +/* + * Function: lpc47n217_enable_serial + * Parameters: dev - high 8 bits = Super I/O port, + * low 8 bits = logical device number (per lpc47n217.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. + */ static void lpc47n217_enable_serial(device_t dev, unsigned iobase) { - // NOTE: Cannot use pnp_set_XXX() here because they assume chip - // support for logical devices, which the LPC47N217 doesn't have - + /* NOTE: Cannot use pnp_set_XXX() here because they assume chip + * support for logical devices, which the LPC47N217 doesn't have*/ + pnp_enter_conf_state(dev); lpc47n217_pnp_set_enable(dev, 0); lpc47n217_pnp_set_iobase(dev, iobase); |