src/superio/smsc/lpc47b272/superio.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2000 AG Electronics Ltd.
   5  * Copyright (C) 2003-2004 Linux Networx
   6  * Copyright (C) 2004 Tyan
   7  * Copyright (C) 2005 Digital Design Corporation
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  22  */
  23
  24 /* RAM driver for SMSC LPC47B272 Super I/O chip. */
  25
  26 #include <arch/io.h>
  27 #include <device/device.h>
  28 #include <device/pnp.h>
  29 #include <console/console.h>
  30 #include <device/smbus.h>
  31 #include <string.h>
  32 #include <bitops.h>
  33 #include <uart8250.h>
  34 #include <pc80/keyboard.h>
  35 #include <stdlib.h>
  36 #include "chip.h"
  37 #include "lpc47b272.h"
  38
  39 /* Forward declarations */
  40 static void enable_dev(device_t dev);
  41 static void lpc47b272_pnp_set_resources(device_t dev);
  42 static void lpc47b272_pnp_enable_resources(device_t dev);
  43 static void lpc47b272_pnp_enable(device_t dev);
  44 static void lpc47b272_init(device_t dev);
  45
  46 static void pnp_enter_conf_state(device_t dev);
  47 static void pnp_exit_conf_state(device_t dev);
  48 //static void dump_pnp_device(device_t dev);
  49
  50 struct chip_operations superio_smsc_lpc47b272_ops = {
  51         CHIP_NAME("SMSC LPC47B272 Super I/O")
  52         .enable_dev = enable_dev
  53 };
  54
  55 static struct device_operations ops = {
  56         .read_resources   = pnp_read_resources,
  57         .set_resources    = lpc47b272_pnp_set_resources,
  58         .enable_resources = lpc47b272_pnp_enable_resources,
  59         .enable           = lpc47b272_pnp_enable,
  60         .init             = lpc47b272_init,
  61 };
  62
  63 static struct pnp_info pnp_dev_info[] = {
  64         { &ops, LPC47B272_FDC,  PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  65         { &ops, LPC47B272_PP,   PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  66         { &ops, LPC47B272_SP1,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  67         { &ops, LPC47B272_SP2,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  68         { &ops, LPC47B272_KBC,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, { 0x7ff, 0 }, { 0x7ff, 0x4}, },
  69         { &ops, LPC47B272_RT,   PNP_IO0, { 0x780, 0 }, },
  70 };
  71
  72 /**
  73  * Create device structures and allocate resources to devices specified in the
  74  * pnp_dev_info array (above).
  75  *
  76  * @param dev Pointer to structure describing a Super I/O device.
  77  */
  78 static void enable_dev(device_t dev)
  79 {
  80         pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info),
  81                            pnp_dev_info);
  82 }
  83
  84 /**
  85  * Configure the specified Super I/O device with the resources (I/O space,
  86  * etc.) that have been allocated for it.
  87  *
  88  * @param dev Pointer to structure describing a Super I/O device.
  89  */
  90 static void lpc47b272_pnp_set_resources(device_t dev)
  91 {
  92         pnp_enter_conf_state(dev);
  93         pnp_set_resources(dev);
  94         pnp_exit_conf_state(dev);
  95 }
  96
  97 static void lpc47b272_pnp_enable_resources(device_t dev)
  98 {
  99         pnp_enter_conf_state(dev);
 100         pnp_enable_resources(dev);
 101         pnp_exit_conf_state(dev);
 102 }
 103
 104 static void lpc47b272_pnp_enable(device_t dev)
 105 {
 106         pnp_enter_conf_state(dev);
 107         pnp_set_logical_device(dev);
 108
 109         if(dev->enabled) {
 110                 pnp_set_enable(dev, 1);
 111         }
 112         else {
 113                 pnp_set_enable(dev, 0);
 114         }
 115         pnp_exit_conf_state(dev);
 116 }
 117
 118 /**
 119  * Initialize the specified Super I/O device.
 120  *
 121  * Devices other than COM ports and the keyboard controller are ignored.
 122  * For COM ports, we configure the baud rate.
 123  *
 124  * @param dev Pointer to structure describing a Super I/O device.
 125  */
 126 static void lpc47b272_init(device_t dev)
 127 {
 128         struct superio_smsc_lpc47b272_config *conf = dev->chip_info;
 129         struct resource *res0;
 130
 131         if (!dev->enabled)
 132                 return;
 133
 134         switch(dev->path.pnp.device) {
 135         case LPC47B272_SP1:
 136                 res0 = find_resource(dev, PNP_IDX_IO0);
 137                 init_uart8250(res0->base, &conf->com1);
 138                 break;
 139
 140         case LPC47B272_SP2:
 141                 res0 = find_resource(dev, PNP_IDX_IO0);
 142                 init_uart8250(res0->base, &conf->com2);
 143                 break;
 144
 145         case LPC47B272_KBC:
 146                 pc_keyboard_init(&conf->keyboard);
 147                 break;
 148         }
 149 }
 150
 151 /** Enable access to the LPC47B272's configuration registers. */
 152 static void pnp_enter_conf_state(device_t dev)
 153 {
 154         outb(0x55, dev->path.pnp.port);
 155 }
 156
 157 /** Disable access to the LPC47B272's configuration registers. */
 158 static void pnp_exit_conf_state(device_t dev)
 159 {
 160         outb(0xaa, dev->path.pnp.port);
 161 }
 162
 163 #if 0
 164 /**
 165  * Print the values of all of the LPC47B272's configuration registers.
 166  *
 167  * NOTE: The LPC47B272 must be in config mode when this function is called.
 168  *
 169  * @param dev Pointer to structure describing a Super I/O device.
 170  */
 171 static void dump_pnp_device(device_t dev)
 172 {
 173         int register_index;
 174         print_debug("\n");
 175
 176         for(register_index = 0; register_index <= LPC47B272_MAX_CONFIG_REGISTER; register_index++) {
 177                 uint8_t register_value;
 178
 179                 if ((register_index & 0x0f) == 0) {
 180                         print_debug_hex8(register_index);
 181                         print_debug_char(':');
 182                 }
 183
 184                 /* Skip over 'register' that would cause exit from configuration mode */
 185                 if (register_index == 0xaa)
 186                         register_value = 0xaa;
 187                 else
 188                         register_value = pnp_read_config(dev, register_index);
 189
 190                 print_debug_char(' ');
 191                 print_debug_hex8(register_value);
 192                 if ((register_index & 0x0f) == 0x0f) {
 193                         print_debug("\n");
 194                 }
 195         }
 196
 197         print_debug("\n");
 198 }
 199 #endif