drivers/pcmcia/pxa2xx_vpac270.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/pcmcia/pxa2xx_vpac270.c
   4  *
   5  * Driver for Voipac PXA270 PCMCIA and CF sockets
   6  *
   7  * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
   8  */
   9
  10 #include <linux/gpio.h>
  11 #include <linux/module.h>
  12 #include <linux/platform_device.h>
  13
  14 #include <asm/mach-types.h>
  15
  16 #include <mach/vpac270.h>
  17
  18 #include "soc_common.h"
  19
  20 static struct gpio vpac270_pcmcia_gpios[] = {
  21         { GPIO107_VPAC270_PCMCIA_PPEN,  GPIOF_INIT_LOW, "PCMCIA PPEN" },
  22         { GPIO11_VPAC270_PCMCIA_RESET,  GPIOF_INIT_LOW, "PCMCIA Reset" },
  23 };
  24
  25 static struct gpio vpac270_cf_gpios[] = {
  26         { GPIO16_VPAC270_CF_RESET,      GPIOF_INIT_LOW, "CF Reset" },
  27 };
  28
  29 static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  30 {
  31         int ret;
  32
  33         if (skt->nr == 0) {
  34                 ret = gpio_request_array(vpac270_pcmcia_gpios,
  35                                 ARRAY_SIZE(vpac270_pcmcia_gpios));
  36
  37                 skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
  38                 skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
  39                 skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
  40                 skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  41         } else {
  42                 ret = gpio_request_array(vpac270_cf_gpios,
  43                                 ARRAY_SIZE(vpac270_cf_gpios));
  44
  45                 skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
  46                 skt->stat[SOC_STAT_CD].name = "CF CD";
  47                 skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
  48                 skt->stat[SOC_STAT_RDY].name = "CF Ready";
  49         }
  50
  51         return ret;
  52 }
  53
  54 static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  55 {
  56         if (skt->nr == 0)
  57                 gpio_free_array(vpac270_pcmcia_gpios,
  58                                         ARRAY_SIZE(vpac270_pcmcia_gpios));
  59         else
  60                 gpio_free_array(vpac270_cf_gpios,
  61                                         ARRAY_SIZE(vpac270_cf_gpios));
  62 }
  63
  64 static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  65                                         struct pcmcia_state *state)
  66 {
  67         state->vs_3v  = 1;
  68         state->vs_Xv  = 0;
  69 }
  70
  71 static int
  72 vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  73                                 const socket_state_t *state)
  74 {
  75         if (skt->nr == 0) {
  76                 gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
  77                         (state->flags & SS_RESET));
  78                 gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
  79                         !(state->Vcc == 33 || state->Vcc == 50));
  80         } else {
  81                 gpio_set_value(GPIO16_VPAC270_CF_RESET,
  82                         (state->flags & SS_RESET));
  83         }
  84
  85         return 0;
  86 }
  87
  88 static struct pcmcia_low_level vpac270_pcmcia_ops = {
  89         .owner                  = THIS_MODULE,
  90
  91         .first                  = 0,
  92         .nr                     = 2,
  93
  94         .hw_init                = vpac270_pcmcia_hw_init,
  95         .hw_shutdown            = vpac270_pcmcia_hw_shutdown,
  96
  97         .socket_state           = vpac270_pcmcia_socket_state,
  98         .configure_socket       = vpac270_pcmcia_configure_socket,
  99 };
 100
 101 static struct platform_device *vpac270_pcmcia_device;
 102
 103 static int __init vpac270_pcmcia_init(void)
 104 {
 105         int ret;
 106
 107         if (!machine_is_vpac270())
 108                 return -ENODEV;
 109
 110         vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
 111         if (!vpac270_pcmcia_device)
 112                 return -ENOMEM;
 113
 114         ret = platform_device_add_data(vpac270_pcmcia_device,
 115                 &vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
 116
 117         if (!ret)
 118                 ret = platform_device_add(vpac270_pcmcia_device);
 119
 120         if (ret)
 121                 platform_device_put(vpac270_pcmcia_device);
 122
 123         return ret;
 124 }
 125
 126 static void __exit vpac270_pcmcia_exit(void)
 127 {
 128         platform_device_unregister(vpac270_pcmcia_device);
 129 }
 130
 131 module_init(vpac270_pcmcia_init);
 132 module_exit(vpac270_pcmcia_exit);
 133
 134 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
 135 MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
 136 MODULE_ALIAS("platform:pxa2xx-pcmcia");
 137 MODULE_LICENSE("GPL");