src/superio/smsc/lpc47m10x/superio.c

   1 /*
   2  * superio.c: RAM driver for SMSC LPC47M10X2 Super I/O chip
   3  *
   4  * Copyright 2000  AG Electronics Ltd.
   5  * Copyright 2003-2004 Linux Networx
   6  * Copyright 2004 Tyan
   7  * Copyright (C) 2005 Digital Design Corporation
   8  * Copyright (C) Ron Minnich, LANL
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  23  */
  24
  25 #include <arch/io.h>
  26 #include <device/device.h>
  27 #include <device/pnp.h>
  28 #include <console/console.h>
  29 #include <device/smbus.h>
  30 #include <string.h>
  31 #include <bitops.h>
  32 #include <uart8250.h>
  33 #include <pc80/keyboard.h>
  34 #include <stdlib.h>
  35 #include "chip.h"
  36 #include "lpc47m10x.h"
  37
  38 /* Forward declarations */
  39 static void enable_dev(device_t dev);
  40 static void lpc47m10x_pnp_set_resources(device_t dev);
  41 static void lpc47m10x_pnp_enable_resources(device_t dev);
  42 static void lpc47m10x_pnp_enable(device_t dev);
  43 static void lpc47m10x_init(device_t dev);
  44
  45 static void pnp_enter_conf_state(device_t dev);
  46 static void pnp_exit_conf_state(device_t dev);
  47 //static void dump_pnp_device(device_t dev);
  48
  49 struct chip_operations superio_smsc_lpc47m10x_ops = {
  50         CHIP_NAME("SMSC LPC47M10x Super I/O")
  51         .enable_dev = enable_dev
  52 };
  53
  54 static struct device_operations ops = {
  55         .read_resources   = pnp_read_resources,
  56         .set_resources    = lpc47m10x_pnp_set_resources,
  57         .enable_resources = lpc47m10x_pnp_enable_resources,
  58         .enable           = lpc47m10x_pnp_enable,
  59         .init             = lpc47m10x_init,
  60 };
  61
  62 static struct pnp_info pnp_dev_info[] = {
  63         { &ops, LPC47M10X2_FDC,  PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  64         { &ops, LPC47M10X2_PP,   PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  65         { &ops, LPC47M10X2_SP1,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  66         { &ops, LPC47M10X2_SP2,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  67         { &ops, LPC47M10X2_KBC,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, { 0x7ff, 0 }, { 0x7ff, 0x4}, },
  68 };
  69
  70 /**
  71  * Create device structures and allocate resources to devices specified in the
  72  * pnp_dev_info array (above).
  73  *
  74  * @param dev Pointer to structure describing a Super I/O device.
  75  */
  76 static void enable_dev(device_t dev)
  77 {
  78         pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info),
  79                            pnp_dev_info);
  80 }
  81
  82 /**
  83  * Configure the specified Super I/O device with the resources (I/O space,
  84  * etc.) that have been allocated for it.
  85  *
  86  * @param dev Pointer to structure describing a Super I/O device.
  87  */
  88 static void lpc47m10x_pnp_set_resources(device_t dev)
  89 {
  90         pnp_enter_conf_state(dev);
  91         pnp_set_resources(dev);
  92         pnp_exit_conf_state(dev);
  93 }
  94
  95 static void lpc47m10x_pnp_enable_resources(device_t dev)
  96 {
  97         pnp_enter_conf_state(dev);
  98         pnp_enable_resources(dev);
  99         pnp_exit_conf_state(dev);
 100 }
 101
 102 static void lpc47m10x_pnp_enable(device_t dev)
 103 {
 104         pnp_enter_conf_state(dev);
 105         pnp_set_logical_device(dev);
 106
 107         if(dev->enabled) {
 108                 pnp_set_enable(dev, 1);
 109         }
 110         else {
 111                 pnp_set_enable(dev, 0);
 112         }
 113         pnp_exit_conf_state(dev);
 114 }
 115
 116 /**
 117  * Initialize the specified Super I/O device.
 118  *
 119  * Devices other than COM ports and the keyboard controller are ignored.
 120  * For COM ports, we configure the baud rate.
 121  *
 122  * @param dev Pointer to structure describing a Super I/O device.
 123  */
 124 static void lpc47m10x_init(device_t dev)
 125 {
 126         struct superio_smsc_lpc47m10x_config *conf = dev->chip_info;
 127         struct resource *res0, *res1;
 128
 129         if (!dev->enabled)
 130                 return;
 131
 132         switch(dev->path.pnp.device) {
 133         case LPC47M10X2_SP1:
 134                 res0 = find_resource(dev, PNP_IDX_IO0);
 135                 init_uart8250(res0->base, &conf->com1);
 136                 break;
 137
 138         case LPC47M10X2_SP2:
 139                 res0 = find_resource(dev, PNP_IDX_IO0);
 140                 init_uart8250(res0->base, &conf->com2);
 141                 break;
 142
 143         case LPC47M10X2_KBC:
 144                 res0 = find_resource(dev, PNP_IDX_IO0);
 145                 res1 = find_resource(dev, PNP_IDX_IO1);
 146                 pc_keyboard_init(&conf->keyboard);
 147                 break;
 148         }
 149 }
 150
 151 /** Enable access to the LPC47M10X2'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 LPC47M10X2'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 LPC47M10X2's configuration registers.
 166  *
 167  * NOTE: The LPC47M10X2 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 <= LPC47M10X2_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