sa1100_h3600.c 3.4 KB

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  1. /*
  2. * drivers/pcmcia/sa1100_h3600.c
  3. *
  4. * PCMCIA implementation routines for H3600
  5. *
  6. */
  7. #include <linux/module.h>
  8. #include <linux/kernel.h>
  9. #include <linux/device.h>
  10. #include <linux/interrupt.h>
  11. #include <linux/init.h>
  12. #include <linux/delay.h>
  13. #include <asm/hardware.h>
  14. #include <asm/irq.h>
  15. #include <asm/mach-types.h>
  16. #include <asm/arch/h3600.h>
  17. #include "sa1100_generic.h"
  18. static struct pcmcia_irqs irqs[] = {
  19. { 0, IRQ_GPIO_H3600_PCMCIA_CD0, "PCMCIA CD0" },
  20. { 1, IRQ_GPIO_H3600_PCMCIA_CD1, "PCMCIA CD1" }
  21. };
  22. static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  23. {
  24. skt->irq = skt->nr ? IRQ_GPIO_H3600_PCMCIA_IRQ1
  25. : IRQ_GPIO_H3600_PCMCIA_IRQ0;
  26. return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
  27. }
  28. static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  29. {
  30. soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
  31. /* Disable CF bus: */
  32. clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  33. clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  34. set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  35. }
  36. static void
  37. h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
  38. {
  39. unsigned long levels = GPLR;
  40. switch (skt->nr) {
  41. case 0:
  42. state->detect = levels & GPIO_H3600_PCMCIA_CD0 ? 0 : 1;
  43. state->ready = levels & GPIO_H3600_PCMCIA_IRQ0 ? 1 : 0;
  44. state->bvd1 = 0;
  45. state->bvd2 = 0;
  46. state->wrprot = 0; /* Not available on H3600. */
  47. state->vs_3v = 0;
  48. state->vs_Xv = 0;
  49. break;
  50. case 1:
  51. state->detect = levels & GPIO_H3600_PCMCIA_CD1 ? 0 : 1;
  52. state->ready = levels & GPIO_H3600_PCMCIA_IRQ1 ? 1 : 0;
  53. state->bvd1 = 0;
  54. state->bvd2 = 0;
  55. state->wrprot = 0; /* Not available on H3600. */
  56. state->vs_3v = 0;
  57. state->vs_Xv = 0;
  58. break;
  59. }
  60. }
  61. static int
  62. h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  63. {
  64. if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
  65. printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
  66. state->Vcc / 10, state->Vcc % 10);
  67. return -1;
  68. }
  69. if (state->flags & SS_RESET)
  70. set_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  71. else
  72. clr_h3600_egpio(IPAQ_EGPIO_CARD_RESET);
  73. /* Silently ignore Vpp, output enable, speaker enable. */
  74. return 0;
  75. }
  76. static void h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
  77. {
  78. /* Enable CF bus: */
  79. set_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  80. set_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  81. clr_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  82. msleep(10);
  83. soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  84. }
  85. static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  86. {
  87. soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
  88. /*
  89. * FIXME: This doesn't fit well. We don't have the mechanism in
  90. * the generic PCMCIA layer to deal with the idea of two sockets
  91. * on one bus. We rely on the cs.c behaviour shutting down
  92. * socket 0 then socket 1.
  93. */
  94. if (skt->nr == 1) {
  95. clr_h3600_egpio(IPAQ_EGPIO_OPT_ON);
  96. clr_h3600_egpio(IPAQ_EGPIO_OPT_NVRAM_ON);
  97. /* hmm, does this suck power? */
  98. set_h3600_egpio(IPAQ_EGPIO_OPT_RESET);
  99. }
  100. }
  101. struct pcmcia_low_level h3600_pcmcia_ops = {
  102. .owner = THIS_MODULE,
  103. .hw_init = h3600_pcmcia_hw_init,
  104. .hw_shutdown = h3600_pcmcia_hw_shutdown,
  105. .socket_state = h3600_pcmcia_socket_state,
  106. .configure_socket = h3600_pcmcia_configure_socket,
  107. .socket_init = h3600_pcmcia_socket_init,
  108. .socket_suspend = h3600_pcmcia_socket_suspend,
  109. };
  110. int __init pcmcia_h3600_init(struct device *dev)
  111. {
  112. int ret = -ENODEV;
  113. if (machine_is_h3600())
  114. ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
  115. return ret;
  116. }