diff options
Diffstat (limited to 'src/superio/smsc/lpc47n217/lpc47n217_early_serial.c')
| -rw-r--r-- | src/superio/smsc/lpc47n217/lpc47n217_early_serial.c | 302 |
1 files changed, 147 insertions, 155 deletions
diff --git a/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c b/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c index d3be378065..ae7c2a73a5 100644 --- a/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c +++ b/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c @@ -1,155 +1,147 @@ -/*
- * $Header: /home/cvs/BIR/ca-cpu/freebios/src/superio/smsc/lpc47n217/lpc47n217_early_serial.c,v 1.1.1.1 2005/07/11 15:28:51 smagnani Exp $
- *
- * lpc47n217_early_serial.c: Pre-RAM driver for SMSC LPC47N217 Super I/O chip
- *
- * Copyright (C) 2005 Digital Design Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- * $Log: lpc47n217_early_serial.c,v $
- * Revision 1.1.1.1 2005/07/11 15:28:51 smagnani
- * Initial revision.
- *
- *
- */
-
-#include <arch/romcc_io.h>
-#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) {
- 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 LPC47N217's configuration registers.
-//
-static void pnp_exit_conf_state(device_t dev) {
- unsigned port = dev>>8;
- 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.
-//
-void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase)
-{
- // LPC47N217 requires base ports to be a multiple of 4
- ASSERT(!(iobase & 0x3));
-
- switch(dev & 0xFF) {
- case LPC47N217_PP:
- pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff);
- break;
-
- 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).
-//
-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:
- power_register = 0x01;
- power_mask = 0x04;
- break;
-
- 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
-
- if (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.
-//
-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
-
- pnp_enter_conf_state(dev);
- lpc47n217_pnp_set_enable(dev, 0);
- lpc47n217_pnp_set_iobase(dev, iobase);
- lpc47n217_pnp_set_enable(dev, 1);
- pnp_exit_conf_state(dev);
-}
+/* + * lpc47n217_early_serial.c: Pre-RAM driver for SMSC LPC47N217 Super I/O chip + * + * Copyright (C) 2005 Digital Design Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/romcc_io.h> +#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) { + 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 LPC47N217's configuration registers. +// +static void pnp_exit_conf_state(device_t dev) { + unsigned port = dev>>8; + 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. +// +void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase) +{ + // LPC47N217 requires base ports to be a multiple of 4 + ASSERT(!(iobase & 0x3)); + + switch(dev & 0xFF) { + case LPC47N217_PP: + pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff); + break; + + 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). +// +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: + power_register = 0x01; + power_mask = 0x04; + break; + + 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 + + if (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. +// +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 + + pnp_enter_conf_state(dev); + lpc47n217_pnp_set_enable(dev, 0); + lpc47n217_pnp_set_iobase(dev, iobase); + lpc47n217_pnp_set_enable(dev, 1); + pnp_exit_conf_state(dev); +} |