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 "chip.h"
  35 #include "lpc47m10x.h"
  36
  37 // Forward declarations
  38 static void enable_dev(device_t dev);
  39 void lpc47m10x_pnp_set_resources(device_t dev);
  40 void lpc47m10x_pnp_set_resources(device_t dev);
  41 void lpc47m10x_pnp_enable_resources(device_t dev);
  42 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
  50 struct chip_operations superio_smsc_lpc47m10x_ops = {
  51         CHIP_NAME("smsc lpc47m10x")
  52         .enable_dev = enable_dev
  53 };
  54
  55 static struct device_operations ops = {
  56         .read_resources   = pnp_read_resources,
  57         .set_resources    = lpc47m10x_pnp_set_resources,
  58         .enable_resources = lpc47m10x_pnp_enable_resources,
  59         .enable           = lpc47m10x_pnp_enable,
  60         .init             = lpc47m10x_init,
  61 };
  62
  63 static struct pnp_info pnp_dev_info[] = {
  64         { &ops, LPC47M10X2_FDC,  PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  65         { &ops, LPC47M10X2_PP,   PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, },
  66         { &ops, LPC47M10X2_SP1,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  67         { &ops, LPC47M10X2_SP2,  PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, },
  68         { &ops, LPC47M10X2_KBC,  PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, { 0x7ff, 0 }, { 0x7ff, 0x4}, },
  69 };
  70
  71 /**********************************************************************************/
  72 /*                                                              PUBLIC INTERFACE                                                                  */
  73 /**********************************************************************************/
  74
  75 //----------------------------------------------------------------------------------
  76 // Function:            enable_dev
  77 // Parameters:          dev - pointer to structure describing a Super I/O device
  78 // Return Value:        None
  79 // Description:         Create device structures and allocate resources to devices
  80 //                                      specified in the pnp_dev_info array (above).
  81 //
  82 static void enable_dev(device_t dev)
  83 {
  84         pnp_enable_devices(dev, &pnp_ops,
  85                                            sizeof(pnp_dev_info)/sizeof(pnp_dev_info[0]),
  86                                            pnp_dev_info);
  87 }
  88
  89 //----------------------------------------------------------------------------------
  90 // Function:            lpc47m10x_pnp_set_resources
  91 // Parameters:          dev - pointer to structure describing a Super I/O device
  92 // Return Value:        None
  93 // Description:         Configure the specified Super I/O device with the resources
  94 //                                      (I/O space, etc.) that have been allocated for it.
  95 //
  96 void lpc47m10x_pnp_set_resources(device_t dev)
  97 {
  98         pnp_enter_conf_state(dev);
  99         pnp_set_resources(dev);
 100     pnp_exit_conf_state(dev);
 101 }
 102
 103 void lpc47m10x_pnp_enable_resources(device_t dev)
 104 {
 105         pnp_enter_conf_state(dev);
 106     pnp_enable_resources(dev);
 107     pnp_exit_conf_state(dev);
 108 }
 109
 110 void lpc47m10x_pnp_enable(device_t dev)
 111 {
 112         pnp_enter_conf_state(dev);
 113         pnp_set_logical_device(dev);
 114
 115         if(dev->enabled) {
 116                 pnp_set_enable(dev, 1);
 117         }
 118         else {
 119                 pnp_set_enable(dev, 0);
 120         }
 121         pnp_exit_conf_state(dev);
 122 }
 123
 124 //----------------------------------------------------------------------------------
 125 // Function:            lpc47m10x_init
 126 // Parameters:          dev - pointer to structure describing a Super I/O device
 127 // Return Value:        None
 128 // Description:         Initialize the specified Super I/O device.
 129 //                                      Devices other than COM ports and the keyboard controller are
 130 //                                      ignored. For COM ports, we configure the baud rate.
 131 //
 132 static void lpc47m10x_init(device_t dev)
 133 {
 134         struct superio_smsc_lpc47m10x_config *conf = dev->chip_info;
 135         struct resource *res0, *res1;
 136
 137         if (!dev->enabled)
 138                 return;
 139
 140         switch(dev->path.u.pnp.device) {
 141         case LPC47M10X2_SP1:
 142                 res0 = find_resource(dev, PNP_IDX_IO0);
 143                 init_uart8250(res0->base, &conf->com1);
 144                 break;
 145
 146         case LPC47M10X2_SP2:
 147                 res0 = find_resource(dev, PNP_IDX_IO0);
 148                 init_uart8250(res0->base, &conf->com2);
 149                 break;
 150
 151         case LPC47M10X2_KBC:
 152                 res0 = find_resource(dev, PNP_IDX_IO0);
 153                 res1 = find_resource(dev, PNP_IDX_IO1);
 154                 init_pc_keyboard(res0->base, res1->base, &conf->keyboard);
 155                 break;
 156         }
 157 }
 158
 159 /**********************************************************************************/
 160 /*                                                              PRIVATE FUNCTIONS                                                             */
 161 /**********************************************************************************/
 162
 163 //----------------------------------------------------------------------------------
 164 // Function:            pnp_enter_conf_state
 165 // Parameters:          dev - pointer to structure describing a Super I/O device
 166 // Return Value:        None
 167 // Description:         Enable access to the LPC47M10X2's configuration registers.
 168 //
 169 static void pnp_enter_conf_state(device_t dev)
 170 {
 171         outb(0x55, dev->path.u.pnp.port);
 172 }
 173
 174 //----------------------------------------------------------------------------------
 175 // Function:            pnp_exit_conf_state
 176 // Parameters:          dev - pointer to structure describing a Super I/O device
 177 // Return Value:        None
 178 // Description:         Disable access to the LPC47M10X2's configuration registers.
 179 //
 180 static void pnp_exit_conf_state(device_t dev)
 181 {
 182     outb(0xaa, dev->path.u.pnp.port);
 183 }
 184
 185 #if 0
 186 //----------------------------------------------------------------------------------
 187 // Function:            dump_pnp_device
 188 // Parameters:          dev - pointer to structure describing a Super I/O device
 189 // Return Value:        None
 190 // Description:         Print the values of all of the LPC47M10X2's configuration registers.
 191 //                                      NOTE: The LPC47M10X2 must be in configuration mode when this
 192 //                                                function is called.
 193 //
 194 static void dump_pnp_device(device_t dev)
 195 {
 196     int register_index;
 197     print_debug("\r\n");
 198
 199     for(register_index = 0; register_index <= LPC47M10X2_MAX_CONFIG_REGISTER; register_index++) {
 200         uint8_t register_value;
 201
 202         if ((register_index & 0x0f) == 0) {
 203                 print_debug_hex8(register_index);
 204                 print_debug_char(':');
 205         }
 206
 207                 // Skip over 'register' that would cause exit from configuration mode
 208             if (register_index == 0xaa)
 209                         register_value = 0xaa;
 210                 else
 211                 register_value = pnp_read_config(dev, register_index);
 212
 213         print_debug_char(' ');
 214         print_debug_hex8(register_value);
 215         if ((register_index & 0x0f) == 0x0f) {
 216                 print_debug("\r\n");
 217         }
 218     }
 219
 220         print_debug("\r\n");
 221 }
 222 #endif