1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/drivers/pcmcia/sa1100_neponset.c
4 *
5 * Neponset PCMCIA specific routines
6 */
7#include <linux/module.h>
8#include <linux/kernel.h>
9#include <linux/device.h>
10#include <linux/errno.h>
11#include <linux/init.h>
12
13#include <asm/mach-types.h>
14
15#include "sa1111_generic.h"
16#include "max1600.h"
17
18/*
19 * Neponset uses the Maxim MAX1600, with the following connections:
20 *
21 *   MAX1600      Neponset
22 *
23 *    A0VCC        SA-1111 GPIO A<1>
24 *    A1VCC        SA-1111 GPIO A<0>
25 *    A0VPP        CPLD NCR A0VPP
26 *    A1VPP        CPLD NCR A1VPP
27 *    B0VCC        SA-1111 GPIO A<2>
28 *    B1VCC        SA-1111 GPIO A<3>
29 *    B0VPP        ground (slot B is CF)
30 *    B1VPP        ground (slot B is CF)
31 *
32 *     VX          VCC (5V)
33 *     VY          VCC3_3 (3.3V)
34 *     12INA       12V
35 *     12INB       ground (slot B is CF)
36 *
37 * The MAX1600 CODE pin is tied to ground, placing the device in
38 * "Standard Intel code" mode. Refer to the Maxim data sheet for
39 * the corresponding truth table.
40 */
41static int neponset_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
42{
43	struct max1600 *m;
44	int ret;
45
46	ret = max1600_init(skt->socket.dev.parent, &m,
47			   skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
48			   MAX1600_CODE_LOW);
49	if (ret == 0)
50		skt->driver_data = m;
51
52	return ret;
53}
54
55static int
56neponset_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
57{
58	struct max1600 *m = skt->driver_data;
59	int ret;
60
61	ret = sa1111_pcmcia_configure_socket(skt, state);
62	if (ret == 0)
63		ret = max1600_configure(m, state->Vcc, state->Vpp);
64
65	return ret;
66}
67
68static struct pcmcia_low_level neponset_pcmcia_ops = {
69	.owner			= THIS_MODULE,
70	.hw_init		= neponset_pcmcia_hw_init,
71	.configure_socket	= neponset_pcmcia_configure_socket,
72	.first			= 0,
73	.nr			= 2,
74};
75
76int pcmcia_neponset_init(struct sa1111_dev *sadev)
77{
78	sa11xx_drv_pcmcia_ops(&neponset_pcmcia_ops);
79	return sa1111_pcmcia_add(sadev, &neponset_pcmcia_ops,
80				 sa11xx_drv_pcmcia_add_one);
81}
82