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, {0x07f8, 0}, },
  67         { &ops, LPC47B272_SP2, PNP_IO0 | PNP_IRQ0, {0x07f8, 0}, },
  68         { &ops, LPC47B272_KBC, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, {0x07ff, 0}, {0x07ff, 4}, },
  69         { &ops, LPC47B272_RT,  PNP_IO0, {0x0780, 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         pnp_set_enable(dev, (dev->enabled) ? 1 : 0);
 109         pnp_exit_conf_state(dev);
 110 }
 111
 112 /**
 113  * Initialize the specified Super I/O device.
 114  *
 115  * Devices other than COM ports and the keyboard controller are ignored.
 116  * For COM ports, we configure the baud rate.
 117  *
 118  * @param dev Pointer to structure describing a Super I/O device.
 119  */
 120 static void lpc47b272_init(device_t dev)
 121 {
 122         struct superio_smsc_lpc47b272_config *conf = dev->chip_info;
 123         struct resource *res0;
 124
 125         if (!dev->enabled)
 126                 return;
 127
 128         switch(dev->path.pnp.device) {
 129         case LPC47B272_SP1:
 130                 res0 = find_resource(dev, PNP_IDX_IO0);
 131                 init_uart8250(res0->base, &conf->com1);
 132                 break;
 133         case LPC47B272_SP2:
 134                 res0 = find_resource(dev, PNP_IDX_IO0);
 135                 init_uart8250(res0->base, &conf->com2);
 136                 break;
 137         case LPC47B272_KBC:
 138                 pc_keyboard_init(&conf->keyboard);
 139                 break;
 140         }
 141 }
 142
 143 static void pnp_enter_conf_state(device_t dev)
 144 {
 145         outb(0x55, dev->path.pnp.port);
 146 }
 147
 148 static void pnp_exit_conf_state(device_t dev)
 149 {
 150         outb(0xaa, dev->path.pnp.port);
 151 }
 152
 153 #if 0
 154 /**
 155  * Print the values of all of the LPC47B272's configuration registers.
 156  *
 157  * NOTE: The LPC47B272 must be in config mode when this function is called.
 158  *
 159  * @param dev Pointer to structure describing a Super I/O device.
 160  */
 161 static void dump_pnp_device(device_t dev)
 162 {
 163         int i;
 164         print_debug("\n");
 165
 166         for (i = 0; i <= LPC47B272_MAX_CONFIG_REGISTER; i++) {
 167                 u8 register_value;
 168
 169                 if ((i & 0x0f) == 0) {
 170                         print_debug_hex8(i);
 171                         print_debug_char(':');
 172                 }
 173
 174                 /*
 175                  * Skip over 'register' that would cause exit from
 176                  * configuration mode.
 177                  */
 178                 if (i == 0xaa)
 179                         register_value = 0xaa;
 180                 else
 181                         register_value = pnp_read_config(dev, i);
 182
 183                 print_debug_char(' ');
 184                 print_debug_hex8(register_value);
 185                 if ((i & 0x0f) == 0x0f)
 186                         print_debug("\n");
 187         }
 188
 189         print_debug("\n");
 190 }
 191 #endif