1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * linux/drivers/pcmcia/pxa/pxa_cm_x255.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Compulab Ltd., 2003, 2007, 2008
6*4882a593Smuzhiyun * Mike Rapoport <mike@compulab.co.il>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #include <linux/platform_device.h>
10*4882a593Smuzhiyun #include <linux/irq.h>
11*4882a593Smuzhiyun #include <linux/delay.h>
12*4882a593Smuzhiyun #include <linux/gpio.h>
13*4882a593Smuzhiyun #include <linux/export.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "soc_common.h"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #define GPIO_PCMCIA_SKTSEL (54)
18*4882a593Smuzhiyun #define GPIO_PCMCIA_S0_CD_VALID (16)
19*4882a593Smuzhiyun #define GPIO_PCMCIA_S1_CD_VALID (17)
20*4882a593Smuzhiyun #define GPIO_PCMCIA_S0_RDYINT (6)
21*4882a593Smuzhiyun #define GPIO_PCMCIA_S1_RDYINT (8)
22*4882a593Smuzhiyun #define GPIO_PCMCIA_RESET (9)
23*4882a593Smuzhiyun
cmx255_pcmcia_hw_init(struct soc_pcmcia_socket * skt)24*4882a593Smuzhiyun static int cmx255_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun int ret = gpio_request(GPIO_PCMCIA_RESET, "PCCard reset");
27*4882a593Smuzhiyun if (ret)
28*4882a593Smuzhiyun return ret;
29*4882a593Smuzhiyun gpio_direction_output(GPIO_PCMCIA_RESET, 0);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (skt->nr == 0) {
32*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S0_CD_VALID;
33*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
34*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S0_RDYINT;
35*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].name = "PCMCIA0 RDY";
36*4882a593Smuzhiyun } else {
37*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].gpio = GPIO_PCMCIA_S1_CD_VALID;
38*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
39*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].gpio = GPIO_PCMCIA_S1_RDYINT;
40*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].name = "PCMCIA1 RDY";
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun return 0;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
cmx255_pcmcia_shutdown(struct soc_pcmcia_socket * skt)46*4882a593Smuzhiyun static void cmx255_pcmcia_shutdown(struct soc_pcmcia_socket *skt)
47*4882a593Smuzhiyun {
48*4882a593Smuzhiyun gpio_free(GPIO_PCMCIA_RESET);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun
cmx255_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)52*4882a593Smuzhiyun static void cmx255_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
53*4882a593Smuzhiyun struct pcmcia_state *state)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun state->vs_3v = 0;
56*4882a593Smuzhiyun state->vs_Xv = 0;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun
cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)60*4882a593Smuzhiyun static int cmx255_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
61*4882a593Smuzhiyun const socket_state_t *state)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun switch (skt->nr) {
64*4882a593Smuzhiyun case 0:
65*4882a593Smuzhiyun if (state->flags & SS_RESET) {
66*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_SKTSEL, 0);
67*4882a593Smuzhiyun udelay(1);
68*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_RESET, 1);
69*4882a593Smuzhiyun udelay(10);
70*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_RESET, 0);
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun break;
73*4882a593Smuzhiyun case 1:
74*4882a593Smuzhiyun if (state->flags & SS_RESET) {
75*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_SKTSEL, 1);
76*4882a593Smuzhiyun udelay(1);
77*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_RESET, 1);
78*4882a593Smuzhiyun udelay(10);
79*4882a593Smuzhiyun gpio_set_value(GPIO_PCMCIA_RESET, 0);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun break;
82*4882a593Smuzhiyun }
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun return 0;
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun static struct pcmcia_low_level cmx255_pcmcia_ops __initdata = {
88*4882a593Smuzhiyun .owner = THIS_MODULE,
89*4882a593Smuzhiyun .hw_init = cmx255_pcmcia_hw_init,
90*4882a593Smuzhiyun .hw_shutdown = cmx255_pcmcia_shutdown,
91*4882a593Smuzhiyun .socket_state = cmx255_pcmcia_socket_state,
92*4882a593Smuzhiyun .configure_socket = cmx255_pcmcia_configure_socket,
93*4882a593Smuzhiyun .nr = 1,
94*4882a593Smuzhiyun };
95*4882a593Smuzhiyun
96*4882a593Smuzhiyun static struct platform_device *cmx255_pcmcia_device;
97*4882a593Smuzhiyun
cmx255_pcmcia_init(void)98*4882a593Smuzhiyun int __init cmx255_pcmcia_init(void)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun int ret;
101*4882a593Smuzhiyun
102*4882a593Smuzhiyun cmx255_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
103*4882a593Smuzhiyun
104*4882a593Smuzhiyun if (!cmx255_pcmcia_device)
105*4882a593Smuzhiyun return -ENOMEM;
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun ret = platform_device_add_data(cmx255_pcmcia_device, &cmx255_pcmcia_ops,
108*4882a593Smuzhiyun sizeof(cmx255_pcmcia_ops));
109*4882a593Smuzhiyun
110*4882a593Smuzhiyun if (ret == 0) {
111*4882a593Smuzhiyun printk(KERN_INFO "Registering cm-x255 PCMCIA interface.\n");
112*4882a593Smuzhiyun ret = platform_device_add(cmx255_pcmcia_device);
113*4882a593Smuzhiyun }
114*4882a593Smuzhiyun
115*4882a593Smuzhiyun if (ret)
116*4882a593Smuzhiyun platform_device_put(cmx255_pcmcia_device);
117*4882a593Smuzhiyun
118*4882a593Smuzhiyun return ret;
119*4882a593Smuzhiyun }
120*4882a593Smuzhiyun
cmx255_pcmcia_exit(void)121*4882a593Smuzhiyun void __exit cmx255_pcmcia_exit(void)
122*4882a593Smuzhiyun {
123*4882a593Smuzhiyun platform_device_unregister(cmx255_pcmcia_device);
124*4882a593Smuzhiyun }
125