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