src/superio/smsc/kbc1100/early_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /* Pre-RAM driver for the SMSC KBC1100 Super I/O chip */
   4
   5 #include <arch/io.h>
   6 #include <device/pnp_ops.h>
   7 #include <device/pnp.h>
   8 #include <stdint.h>
   9
  10 #include "kbc1100.h"
  11
  12 static void pnp_enter_conf_state(pnp_devfn_t dev)
  13 {
  14         u16 port = dev >> 8;
  15         outb(0x55, port);
  16 }
  17
  18 static void pnp_exit_conf_state(pnp_devfn_t dev)
  19 {
  20         u16 port = dev >> 8;
  21         outb(0xaa, port);
  22 }
  23
  24 void kbc1100_early_serial(pnp_devfn_t dev, u16 iobase)
  25 {
  26         pnp_enter_conf_state(dev);
  27         pnp_set_logical_device(dev);
  28         pnp_set_enable(dev, 0);
  29         pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
  30         pnp_set_enable(dev, 1);
  31         pnp_exit_conf_state(dev);
  32 }
  33
  34 void kbc1100_early_init(u16 port)
  35 {
  36         pnp_devfn_t dev;
  37         dev = PNP_DEV(port, KBC1100_KBC);
  38         pnp_enter_conf_state(dev);
  39
  40         /* Serial IRQ enabled */
  41         outb(0x25, port);
  42         outb(0x04, port + 1);
  43
  44         /* Enable keyboard */
  45         pnp_set_logical_device(dev);
  46         pnp_set_enable(dev, 0);
  47         pnp_set_iobase(dev, PNP_IDX_IO0, 0x60);
  48         pnp_set_iobase(dev, PNP_IDX_IO1, 0x64);
  49         pnp_set_irq(dev, PNP_IDX_IRQ0, 1);   /* IRQ 1 */
  50         pnp_set_irq(dev, PNP_IDX_IRQ1, 12);   /* IRQ 12 */
  51         pnp_set_enable(dev, 1);
  52
  53         /* Enable EC Channel 0 */
  54         dev = PNP_DEV(port, KBC1100_EC0);
  55         pnp_set_logical_device(dev);
  56         pnp_set_enable(dev, 1);
  57
  58         pnp_exit_conf_state(dev);
  59
  60         /* disable the 1s timer */
  61         outb(0xE7, 0x64);
  62 }