1 /*
2  * drivers/pcmcia/sa1100_cerf.c
3  *
4  * PCMCIA implementation routines for CerfBoard
5  * Based off the Assabet.
6  *
7  */
8 #include <linux/module.h>
9 #include <linux/kernel.h>
10 #include <linux/device.h>
11 #include <linux/init.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 
15 #include <mach/hardware.h>
16 #include <asm/mach-types.h>
17 #include <asm/irq.h>
18 #include <mach/cerf.h>
19 #include "sa1100_generic.h"
20 
21 #define CERF_SOCKET	1
22 
cerf_pcmcia_hw_init(struct soc_pcmcia_socket * skt)23 static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
24 {
25 	int ret;
26 
27 	ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
28 	if (ret)
29 		return ret;
30 
31 	skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
32 	skt->stat[SOC_STAT_CD].name = "CF_CD";
33 	skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
34 	skt->stat[SOC_STAT_BVD1].name = "CF_BVD1";
35 	skt->stat[SOC_STAT_BVD2].gpio = CERF_GPIO_CF_BVD2;
36 	skt->stat[SOC_STAT_BVD2].name = "CF_BVD2";
37 	skt->stat[SOC_STAT_RDY].gpio = CERF_GPIO_CF_IRQ;
38 	skt->stat[SOC_STAT_RDY].name = "CF_IRQ";
39 
40 	return 0;
41 }
42 
cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)43 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
44 {
45 	gpio_free(CERF_GPIO_CF_RESET);
46 }
47 
48 static void
cerf_pcmcia_socket_state(struct soc_pcmcia_socket * skt,struct pcmcia_state * state)49 cerf_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
50 {
51 	state->vs_3v	= 1;
52 	state->vs_Xv	= 0;
53 }
54 
55 static int
cerf_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)56 cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
57 			     const socket_state_t *state)
58 {
59 	switch (state->Vcc) {
60 	case 0:
61 	case 50:
62 	case 33:
63 		break;
64 
65 	default:
66 		printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
67 			__func__, state->Vcc);
68 		return -1;
69 	}
70 
71 	gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
72 
73 	return 0;
74 }
75 
76 static struct pcmcia_low_level cerf_pcmcia_ops = {
77 	.owner			= THIS_MODULE,
78 	.hw_init		= cerf_pcmcia_hw_init,
79 	.hw_shutdown		= cerf_pcmcia_hw_shutdown,
80 	.socket_state		= cerf_pcmcia_socket_state,
81 	.configure_socket	= cerf_pcmcia_configure_socket,
82 };
83 
pcmcia_cerf_init(struct device * dev)84 int __devinit pcmcia_cerf_init(struct device *dev)
85 {
86 	int ret = -ENODEV;
87 
88 	if (machine_is_cerf())
89 		ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
90 
91 	return ret;
92 }
93