pxa2xx_vpac270.c 3.3 KB

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