1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * drivers/pcmcia/sa1100_cerf.c
4 *
5 * PCMCIA implementation routines for CerfBoard
6 * Based off the Assabet.
7 *
8 */
9 #include <linux/module.h>
10 #include <linux/kernel.h>
11 #include <linux/device.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/mach-types.h>
18 #include <asm/irq.h>
19 #include <mach/cerf.h>
20 #include "sa1100_generic.h"
21
22 #define CERF_SOCKET 1
23
cerf_pcmcia_hw_init(struct soc_pcmcia_socket * skt)24 static int cerf_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
25 {
26 int ret;
27
28 ret = gpio_request_one(CERF_GPIO_CF_RESET, GPIOF_OUT_INIT_LOW, "CF_RESET");
29 if (ret)
30 return ret;
31
32 skt->stat[SOC_STAT_CD].gpio = CERF_GPIO_CF_CD;
33 skt->stat[SOC_STAT_CD].name = "CF_CD";
34 skt->stat[SOC_STAT_BVD1].gpio = CERF_GPIO_CF_BVD1;
35 skt->stat[SOC_STAT_BVD1].name = "CF_BVD1";
36 skt->stat[SOC_STAT_BVD2].gpio = CERF_GPIO_CF_BVD2;
37 skt->stat[SOC_STAT_BVD2].name = "CF_BVD2";
38 skt->stat[SOC_STAT_RDY].gpio = CERF_GPIO_CF_IRQ;
39 skt->stat[SOC_STAT_RDY].name = "CF_IRQ";
40
41 return 0;
42 }
43
cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket * skt)44 static void cerf_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
45 {
46 gpio_free(CERF_GPIO_CF_RESET);
47 }
48
49 static int
cerf_pcmcia_configure_socket(struct soc_pcmcia_socket * skt,const socket_state_t * state)50 cerf_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
51 const socket_state_t *state)
52 {
53 switch (state->Vcc) {
54 case 0:
55 case 50:
56 case 33:
57 break;
58
59 default:
60 printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
61 __func__, state->Vcc);
62 return -1;
63 }
64
65 gpio_set_value(CERF_GPIO_CF_RESET, !!(state->flags & SS_RESET));
66
67 return 0;
68 }
69
70 static struct pcmcia_low_level cerf_pcmcia_ops = {
71 .owner = THIS_MODULE,
72 .hw_init = cerf_pcmcia_hw_init,
73 .hw_shutdown = cerf_pcmcia_hw_shutdown,
74 .socket_state = soc_common_cf_socket_state,
75 .configure_socket = cerf_pcmcia_configure_socket,
76 };
77
pcmcia_cerf_init(struct device * dev)78 int pcmcia_cerf_init(struct device *dev)
79 {
80 int ret = -ENODEV;
81
82 if (machine_is_cerf())
83 ret = sa11xx_drv_pcmcia_probe(dev, &cerf_pcmcia_ops, CERF_SOCKET, 1);
84
85 return ret;
86 }
87