1// SPDX-License-Identifier: GPL-2.0
2/*
3 * drivers/pcmcia/sa1100_h3600.c
4 *
5 * PCMCIA implementation routines for H3600
6 *
7 */
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/device.h>
11#include <linux/interrupt.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/gpio.h>
15
16#include <mach/hardware.h>
17#include <asm/irq.h>
18#include <asm/mach-types.h>
19#include <mach/h3xxx.h>
20
21#include "sa1100_generic.h"
22
23static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
24{
25	int err;
26
27	skt->stat[SOC_STAT_CD].name = skt->nr ? "pcmcia1-detect" : "pcmcia0-detect";
28	skt->stat[SOC_STAT_RDY].name = skt->nr ? "pcmcia1-ready" : "pcmcia0-ready";
29
30	err = soc_pcmcia_request_gpiods(skt);
31	if (err)
32		return err;
33
34	switch (skt->nr) {
35	case 0:
36		err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
37		if (err)
38			goto err01;
39		err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
40		if (err)
41			goto err03;
42		err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
43		if (err)
44			goto err03;
45		err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
46		if (err)
47			goto err04;
48		err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
49		if (err)
50			goto err04;
51		err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
52		if (err)
53			goto err05;
54		err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
55		if (err)
56			goto err05;
57		err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
58		if (err)
59			goto err06;
60		break;
61	case 1:
62		break;
63	}
64	return 0;
65
66err06:	gpio_free(H3XXX_EGPIO_CARD_RESET);
67err05:	gpio_free(H3XXX_EGPIO_OPT_RESET);
68err04:	gpio_free(H3XXX_EGPIO_OPT_ON);
69err03:	gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
70err01:	gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
71	return err;
72}
73
74static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
75{
76	switch (skt->nr) {
77	case 0:
78		/* Disable CF bus: */
79		gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
80		gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
81		gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
82
83		gpio_free(H3XXX_EGPIO_CARD_RESET);
84		gpio_free(H3XXX_EGPIO_OPT_RESET);
85		gpio_free(H3XXX_EGPIO_OPT_ON);
86		gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
87		break;
88	case 1:
89		break;
90	}
91}
92
93static void
94h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
95{
96	state->bvd1 = 0;
97	state->bvd2 = 0;
98	state->vs_3v = 0;
99	state->vs_Xv = 0;
100}
101
102static int
103h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
104{
105	if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
106		printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
107		       state->Vcc / 10, state->Vcc % 10);
108		return -1;
109	}
110
111	gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
112
113	/* Silently ignore Vpp, output enable, speaker enable. */
114
115	return 0;
116}
117
118static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
119{
120	/* Enable CF bus: */
121	gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
122	gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
123	gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
124
125	msleep(10);
126}
127
128static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
129{
130	/*
131	 * FIXME:  This doesn't fit well.  We don't have the mechanism in
132	 * the generic PCMCIA layer to deal with the idea of two sockets
133	 * on one bus.  We rely on the cs.c behaviour shutting down
134	 * socket 0 then socket 1.
135	 */
136	if (skt->nr == 1) {
137		gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
138		gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
139		/* hmm, does this suck power? */
140		gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
141	}
142}
143
144struct pcmcia_low_level h3600_pcmcia_ops = {
145	.owner			= THIS_MODULE,
146	.hw_init		= h3600_pcmcia_hw_init,
147	.hw_shutdown		= h3600_pcmcia_hw_shutdown,
148	.socket_state		= h3600_pcmcia_socket_state,
149	.configure_socket	= h3600_pcmcia_configure_socket,
150
151	.socket_init		= h3600_pcmcia_socket_init,
152	.socket_suspend		= h3600_pcmcia_socket_suspend,
153};
154
155int pcmcia_h3600_init(struct device *dev)
156{
157	int ret = -ENODEV;
158
159	if (machine_is_h3600() || machine_is_h3100())
160		ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
161
162	return ret;
163}
164