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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 
pnp_enter_conf_state(pnp_devfn_t dev)12 static void pnp_enter_conf_state(pnp_devfn_t dev)
13 {
14 	u16 port = dev >> 8;
15 	outb(0x55, port);
16 }
17 
pnp_exit_conf_state(pnp_devfn_t dev)18 static void pnp_exit_conf_state(pnp_devfn_t dev)
19 {
20 	u16 port = dev >> 8;
21 	outb(0xaa, port);
22 }
23 
kbc1100_early_serial(pnp_devfn_t dev,u16 iobase)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 
kbc1100_early_init(u16 port)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 }
63