1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com>
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/module.h>
7*4882a593Smuzhiyun #include <linux/platform_device.h>
8*4882a593Smuzhiyun #include <linux/err.h>
9*4882a593Smuzhiyun #include <linux/gpio.h>
10*4882a593Smuzhiyun #include <linux/irq.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <asm/mach-types.h>
13*4882a593Smuzhiyun #include <mach/hx4700.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "soc_common.h"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static struct gpio gpios[] = {
18*4882a593Smuzhiyun { GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" },
19*4882a593Smuzhiyun { EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" },
20*4882a593Smuzhiyun };
21*4882a593Smuzhiyun
hx4700_pcmcia_hw_init(struct soc_pcmcia_socket * skt)22*4882a593Smuzhiyun static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun int ret;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun ret = gpio_request_array(gpios, ARRAY_SIZE(gpios));
27*4882a593Smuzhiyun if (ret)
28*4882a593Smuzhiyun goto out;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun /*
31*4882a593Smuzhiyun * IRQ type must be set before soc_pcmcia_hw_init() calls request_irq().
32*4882a593Smuzhiyun * The asic3 default IRQ type is level trigger low level detect, exactly
33*4882a593Smuzhiyun * the the signal present on GPIOD4_CF_nCD when a CF card is inserted.
34*4882a593Smuzhiyun * If the IRQ type is not changed, the asic3 interrupt handler will loop
35*4882a593Smuzhiyun * repeatedly because it is unable to clear the level trigger interrupt.
36*4882a593Smuzhiyun */
37*4882a593Smuzhiyun irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD;
40*4882a593Smuzhiyun skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
41*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB;
42*4882a593Smuzhiyun skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun out:
45*4882a593Smuzhiyun return ret;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)48*4882a593Smuzhiyun static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
49*4882a593Smuzhiyun {
50*4882a593Smuzhiyun gpio_free_array(gpios, ARRAY_SIZE(gpios));
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
hx4700_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)53*4882a593Smuzhiyun static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
54*4882a593Smuzhiyun struct pcmcia_state *state)
55*4882a593Smuzhiyun {
56*4882a593Smuzhiyun state->vs_3v = 1;
57*4882a593Smuzhiyun state->vs_Xv = 0;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)60*4882a593Smuzhiyun static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
61*4882a593Smuzhiyun const socket_state_t *state)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun switch (state->Vcc) {
64*4882a593Smuzhiyun case 0:
65*4882a593Smuzhiyun gpio_set_value(EGPIO4_CF_3V3_ON, 0);
66*4882a593Smuzhiyun break;
67*4882a593Smuzhiyun case 33:
68*4882a593Smuzhiyun gpio_set_value(EGPIO4_CF_3V3_ON, 1);
69*4882a593Smuzhiyun break;
70*4882a593Smuzhiyun default:
71*4882a593Smuzhiyun printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc);
72*4882a593Smuzhiyun return -EINVAL;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun return 0;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun static struct pcmcia_low_level hx4700_pcmcia_ops = {
81*4882a593Smuzhiyun .owner = THIS_MODULE,
82*4882a593Smuzhiyun .nr = 1,
83*4882a593Smuzhiyun .hw_init = hx4700_pcmcia_hw_init,
84*4882a593Smuzhiyun .hw_shutdown = hx4700_pcmcia_hw_shutdown,
85*4882a593Smuzhiyun .socket_state = hx4700_pcmcia_socket_state,
86*4882a593Smuzhiyun .configure_socket = hx4700_pcmcia_configure_socket,
87*4882a593Smuzhiyun };
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct platform_device *hx4700_pcmcia_device;
90*4882a593Smuzhiyun
hx4700_pcmcia_init(void)91*4882a593Smuzhiyun static int __init hx4700_pcmcia_init(void)
92*4882a593Smuzhiyun {
93*4882a593Smuzhiyun struct platform_device *pdev;
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun if (!machine_is_h4700())
96*4882a593Smuzhiyun return -ENODEV;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1,
99*4882a593Smuzhiyun &hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops));
100*4882a593Smuzhiyun if (IS_ERR(pdev))
101*4882a593Smuzhiyun return PTR_ERR(pdev);
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun hx4700_pcmcia_device = pdev;
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun return 0;
106*4882a593Smuzhiyun }
107*4882a593Smuzhiyun
hx4700_pcmcia_exit(void)108*4882a593Smuzhiyun static void __exit hx4700_pcmcia_exit(void)
109*4882a593Smuzhiyun {
110*4882a593Smuzhiyun platform_device_unregister(hx4700_pcmcia_device);
111*4882a593Smuzhiyun }
112*4882a593Smuzhiyun
113*4882a593Smuzhiyun module_init(hx4700_pcmcia_init);
114*4882a593Smuzhiyun module_exit(hx4700_pcmcia_exit);
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
117*4882a593Smuzhiyun MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver");
118*4882a593Smuzhiyun MODULE_LICENSE("GPL");
119