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 void lpc47b272_pnp_set_resources(device_t dev);
  42 void lpc47b272_pnp_set_resources(device_t dev);
  43 void lpc47b272_pnp_enable_resources(device_t dev);
  44 void lpc47b272_pnp_enable(device_t dev);
  45 static void lpc47b272_init(device_t dev);
  46
  47 static void pnp_enter_conf_state(device_t dev);
  48 static void pnp_exit_conf_state(device_t dev);
  49 static void dump_pnp_device(device_t dev);
  50
  51
  52 struct chip_operations superio_smsc_lpc47b272_ops = {
  53         CHIP_NAME("SMSC LPC47B272 Super I/O")
  54         .enable_dev = enable_dev
  55 };
  56
  57 static struct device_operations ops = {
  58         .read_resources   = pnp_read_resources,
  59         .set_resources    = lpc47b272_pnp_set_resources,
  60         .enable_resources = lpc47b272_pnp_enable_resources,
  61         .enable           = lpc47b272_pnp_enable,
  62         .init             = lpc47b272_init,
  63 };
  64
  65 static struct pnp_info pnp_dev_info[] = {
  66         { &ops, LPC47B272_FDC,  PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  67         { &ops, LPC47B272_PP,   PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  68         { &ops, LPC47B272_SP1,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  69         { &ops, LPC47B272_SP2,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  70         { &ops, LPC47B272_KBC,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, { 0x7ff, 0 }, { 0x7ff, 0x4}, },
  71         { &ops, LPC47B272_RT,   PNP_IO0, { 0x780, 0 }, },
  72 };
  73
  74 /**********************************************************************************/
  75 /*                                                              PUBLIC INTERFACE                                                                  */
  76 /**********************************************************************************/
  77
  78 //----------------------------------------------------------------------------------
  79 // Function:            enable_dev
  80 // Parameters:          dev - pointer to structure describing a Super I/O device
  81 // Return Value:        None
  82 // Description:         Create device structures and allocate resources to devices
  83 //                                      specified in the pnp_dev_info array (above).
  84 //
  85 static void enable_dev(device_t dev)
  86 {
  87         pnp_enable_devices(dev, &pnp_ops,
  88                                            ARRAY_SIZE(pnp_dev_info),
  89                                            pnp_dev_info);
  90 }
  91
  92 //----------------------------------------------------------------------------------
  93 // Function:            lpc47b272_pnp_set_resources
  94 // Parameters:          dev - pointer to structure describing a Super I/O device
  95 // Return Value:        None
  96 // Description:         Configure the specified Super I/O device with the resources
  97 //                                      (I/O space, etc.) that have been allocated for it.
  98 //
  99 void lpc47b272_pnp_set_resources(device_t dev)
 100 {
 101         pnp_enter_conf_state(dev);
 102         pnp_set_resources(dev);
 103     pnp_exit_conf_state(dev);
 104 }
 105
 106 void lpc47b272_pnp_enable_resources(device_t dev)
 107 {
 108         pnp_enter_conf_state(dev);
 109     pnp_enable_resources(dev);
 110     pnp_exit_conf_state(dev);
 111 }
 112
 113 void lpc47b272_pnp_enable(device_t dev)
 114 {
 115         pnp_enter_conf_state(dev);
 116         pnp_set_logical_device(dev);
 117
 118         if(dev->enabled) {
 119                 pnp_set_enable(dev, 1);
 120         }
 121         else {
 122                 pnp_set_enable(dev, 0);
 123         }
 124         pnp_exit_conf_state(dev);
 125 }
 126
 127 //----------------------------------------------------------------------------------
 128 // Function:            lpc47b272_init
 129 // Parameters:          dev - pointer to structure describing a Super I/O device
 130 // Return Value:        None
 131 // Description:         Initialize the specified Super I/O device.
 132 //                                      Devices other than COM ports and the keyboard controller are
 133 //                                      ignored. For COM ports, we configure the baud rate.
 134 //
 135 static void lpc47b272_init(device_t dev)
 136 {
 137         struct superio_smsc_lpc47b272_config *conf = dev->chip_info;
 138         struct resource *res0, *res1;
 139
 140         if (!dev->enabled)
 141                 return;
 142
 143         switch(dev->path.pnp.device) {
 144         case LPC47B272_SP1:
 145                 res0 = find_resource(dev, PNP_IDX_IO0);
 146                 init_uart8250(res0->base, &conf->com1);
 147                 break;
 148
 149         case LPC47B272_SP2:
 150                 res0 = find_resource(dev, PNP_IDX_IO0);
 151                 init_uart8250(res0->base, &conf->com2);
 152                 break;
 153
 154         case LPC47B272_KBC:
 155                 res0 = find_resource(dev, PNP_IDX_IO0);
 156                 res1 = find_resource(dev, PNP_IDX_IO1);
 157                 init_pc_keyboard(res0->base, res1->base, &conf->keyboard);
 158                 break;
 159         }
 160 }
 161
 162 /**********************************************************************************/
 163 /*                                                              PRIVATE FUNCTIONS                                                             */
 164 /**********************************************************************************/
 165
 166 //----------------------------------------------------------------------------------
 167 // Function:            pnp_enter_conf_state
 168 // Parameters:          dev - pointer to structure describing a Super I/O device
 169 // Return Value:        None
 170 // Description:         Enable access to the LPC47B272's configuration registers.
 171 //
 172 static void pnp_enter_conf_state(device_t dev)
 173 {
 174         outb(0x55, dev->path.pnp.port);
 175 }
 176
 177 //----------------------------------------------------------------------------------
 178 // Function:            pnp_exit_conf_state
 179 // Parameters:          dev - pointer to structure describing a Super I/O device
 180 // Return Value:        None
 181 // Description:         Disable access to the LPC47B272's configuration registers.
 182 //
 183 static void pnp_exit_conf_state(device_t dev)
 184 {
 185     outb(0xaa, dev->path.pnp.port);
 186 }
 187
 188 #if 0
 189 //----------------------------------------------------------------------------------
 190 // Function:            dump_pnp_device
 191 // Parameters:          dev - pointer to structure describing a Super I/O device
 192 // Return Value:        None
 193 // Description:         Print the values of all of the LPC47B272's configuration registers.
 194 //                                      NOTE: The LPC47B272 must be in configuration mode when this
 195 //                                                function is called.
 196 //
 197 static void dump_pnp_device(device_t dev)
 198 {
 199     int register_index;
 200     print_debug("\r\n");
 201
 202     for(register_index = 0; register_index <= LPC47B272_MAX_CONFIG_REGISTER; register_index++) {
 203         uint8_t register_value;
 204
 205         if ((register_index & 0x0f) == 0) {
 206                 print_debug_hex8(register_index);
 207                 print_debug_char(':');
 208         }
 209
 210                 // Skip over 'register' that would cause exit from configuration mode
 211             if (register_index == 0xaa)
 212                         register_value = 0xaa;
 213                 else
 214                 register_value = pnp_read_config(dev, register_index);
 215
 216         print_debug_char(' ');
 217         print_debug_hex8(register_value);
 218         if ((register_index & 0x0f) == 0x0f) {
 219                 print_debug("\r\n");
 220         }
 221     }
 222
 223         print_debug("\r\n");
 224 }
 225 #endif