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 /*                              PUBLIC INTERFACE                                  */
  72 /**********************************************************************************/
  73
  74 /*
  75  * Function:            enable_dev
  76  * Parameters:          dev - pointer to structure describing a Super I/O device
  77  * Return Value:        None
  78  * Description:         Create device structures and allocate resources to devices
  79  *                      specified in the pnp_dev_info array (above).
  80  */
  81 static void enable_dev(device_t dev)
  82 {
  83         pnp_enable_devices(dev, &pnp_ops,
  84                            ARRAY_SIZE(pnp_dev_info),
  85                            pnp_dev_info);
  86 }
  87
  88 /*
  89  * Function:            lpc47m10x_pnp_set_resources
  90  * Parameters:          dev - pointer to structure describing a Super I/O device
  91  * Return Value:        None
  92  * Description:         Configure the specified Super I/O device with the resources
  93  *                      (I/O space, etc.) that have been allocated for it.
  94  */
  95 static void lpc47m10x_pnp_set_resources(device_t dev)
  96 {
  97         pnp_enter_conf_state(dev);
  98         pnp_set_resources(dev);
  99         pnp_exit_conf_state(dev);
 100 }
 101
 102 static void lpc47m10x_pnp_enable_resources(device_t dev)
 103 {
 104         pnp_enter_conf_state(dev);
 105         pnp_enable_resources(dev);
 106         pnp_exit_conf_state(dev);
 107 }
 108
 109 static void lpc47m10x_pnp_enable(device_t dev)
 110 {
 111         pnp_enter_conf_state(dev);
 112         pnp_set_logical_device(dev);
 113
 114         if(dev->enabled) {
 115                 pnp_set_enable(dev, 1);
 116         }
 117         else {
 118                 pnp_set_enable(dev, 0);
 119         }
 120         pnp_exit_conf_state(dev);
 121 }
 122
 123 /*
 124  * Function:            lpc47m10x_init
 125  * Parameters:          dev - pointer to structure describing a Super I/O device
 126  * Return Value:        None
 127  * Description:         Initialize the specified Super I/O device.
 128  *                      Devices other than COM ports and the keyboard controller are
 129  *                      ignored. For COM ports, we configure the baud rate.
 130  */
 131 static void lpc47m10x_init(device_t dev)
 132 {
 133         struct superio_smsc_lpc47m10x_config *conf = dev->chip_info;
 134         struct resource *res0, *res1;
 135
 136         if (!dev->enabled)
 137                 return;
 138
 139         switch(dev->path.pnp.device) {
 140         case LPC47M10X2_SP1:
 141                 res0 = find_resource(dev, PNP_IDX_IO0);
 142                 init_uart8250(res0->base, &conf->com1);
 143                 break;
 144
 145         case LPC47M10X2_SP2:
 146                 res0 = find_resource(dev, PNP_IDX_IO0);
 147                 init_uart8250(res0->base, &conf->com2);
 148                 break;
 149
 150         case LPC47M10X2_KBC:
 151                 res0 = find_resource(dev, PNP_IDX_IO0);
 152                 res1 = find_resource(dev, PNP_IDX_IO1);
 153                 pc_keyboard_init(&conf->keyboard);
 154                 break;
 155         }
 156 }
 157
 158 /**********************************************************************************/
 159 /*                              PRIVATE FUNCTIONS                                 */
 160 /**********************************************************************************/
 161
 162 /*
 163  * Function:            pnp_enter_conf_state
 164  * Parameters:          dev - pointer to structure describing a Super I/O device
 165  * Return Value:        None
 166  * Description:         Enable access to the LPC47M10X2's configuration registers.
 167  */
 168 static void pnp_enter_conf_state(device_t dev)
 169 {
 170         outb(0x55, dev->path.pnp.port);
 171 }
 172
 173 /*
 174  * Function:            pnp_exit_conf_state
 175  * Parameters:          dev - pointer to structure describing a Super I/O device
 176  * Return Value:        None
 177  * Description:         Disable access to the LPC47M10X2's configuration registers.
 178  */
 179 static void pnp_exit_conf_state(device_t dev)
 180 {
 181         outb(0xaa, dev->path.pnp.port);
 182 }
 183
 184 #if 0
 185 /*
 186  * Function:            dump_pnp_device
 187  * Parameters:          dev - pointer to structure describing a Super I/O device
 188  * Return Value:        None
 189  * Description:         Print the values of all of the LPC47M10X2's configuration registers.
 190  *                      NOTE: The LPC47M10X2 must be in configuration mode when this
 191  *                      function is called.
 192  */
 193 static void dump_pnp_device(device_t dev)
 194 {
 195         int register_index;
 196         print_debug("\n");
 197
 198         for(register_index = 0; register_index <= LPC47M10X2_MAX_CONFIG_REGISTER; register_index++) {
 199                 uint8_t register_value;
 200
 201                 if ((register_index & 0x0f) == 0) {
 202                         print_debug_hex8(register_index);
 203                         print_debug_char(':');
 204                 }
 205
 206                 /* Skip over 'register' that would cause exit from configuration mode */
 207                 if (register_index == 0xaa)
 208                         register_value = 0xaa;
 209                 else
 210                         register_value = pnp_read_config(dev, register_index);
 211
 212                 print_debug_char(' ');
 213                 print_debug_hex8(register_value);
 214                 if ((register_index & 0x0f) == 0x0f) {
 215                         print_debug("\n");
 216                 }
 217         }
 218
 219         print_debug("\n");
 220 }
 221 #endif