src/superio/nsc/pc87417/early_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <arch/io.h>
   4 #include <device/pnp_ops.h>
   5 #include <device/pnp.h>
   6 #include <stdint.h>
   7 #include "pc87417.h"
   8
   9 void pc87417_disable_dev(pnp_devfn_t dev)
  10 {
  11         pnp_set_logical_device(dev);
  12         pnp_set_enable(dev, 0);
  13 }
  14
  15 void pc87417_enable_dev(pnp_devfn_t dev)
  16 {
  17         pnp_set_logical_device(dev);
  18         pnp_set_enable(dev, 1);
  19 }
  20
  21 void xbus_cfg(pnp_devfn_t dev)
  22 {
  23         u8 i;
  24         u16 xbus_index;
  25
  26         pnp_set_logical_device(dev);
  27         /* Select proper BIOS size (4MB). */
  28         pnp_write_config(dev, PC87417_XMEMCNF2,
  29                          (pnp_read_config(dev, PC87417_XMEMCNF2)) | 0x04);
  30         xbus_index = pnp_read_iobase(dev, PNP_IDX_IO0);
  31
  32         /* Enable writes to devices attached to XCS0 (XBUS Chip Select 0). */
  33         for (i = 0; i <= 0xf; i++)
  34                 outb((i << 4), xbus_index + PC87417_HAP0);
  35 }