sa1100_simpad.c 2.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * drivers/pcmcia/sa1100_simpad.c
  4. *
  5. * PCMCIA implementation routines for simpad
  6. *
  7. */
  8. #include <linux/module.h>
  9. #include <linux/kernel.h>
  10. #include <linux/device.h>
  11. #include <linux/init.h>
  12. #include <mach/hardware.h>
  13. #include <asm/mach-types.h>
  14. #include <mach/simpad.h>
  15. #include "sa1100_generic.h"
  16. static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  17. {
  18. simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  19. skt->stat[SOC_STAT_CD].name = "cf-detect";
  20. skt->stat[SOC_STAT_RDY].name = "cf-ready";
  21. return soc_pcmcia_request_gpiods(skt);
  22. }
  23. static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  24. {
  25. /* Disable CF bus: */
  26. /*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
  27. simpad_clear_cs3_bit(PCMCIA_RESET);
  28. }
  29. static void
  30. simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  31. struct pcmcia_state *state)
  32. {
  33. long cs3reg = simpad_get_cs3_ro();
  34. /* bvd1 might be cs3reg & PCMCIA_BVD1 */
  35. /* bvd2 might be cs3reg & PCMCIA_BVD2 */
  36. if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
  37. (PCMCIA_VS1|PCMCIA_VS2)) {
  38. state->vs_3v=0;
  39. state->vs_Xv=0;
  40. } else {
  41. state->vs_3v=1;
  42. state->vs_Xv=0;
  43. }
  44. }
  45. static int
  46. simpad_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  47. const socket_state_t *state)
  48. {
  49. unsigned long flags;
  50. local_irq_save(flags);
  51. /* Murphy: see table of MIC2562a-1 */
  52. switch (state->Vcc) {
  53. case 0:
  54. simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  55. break;
  56. case 33:
  57. simpad_clear_cs3_bit(VCC_3V_EN|EN1);
  58. simpad_set_cs3_bit(VCC_5V_EN|EN0);
  59. break;
  60. case 50:
  61. simpad_clear_cs3_bit(VCC_5V_EN|EN1);
  62. simpad_set_cs3_bit(VCC_3V_EN|EN0);
  63. break;
  64. default:
  65. printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
  66. __func__, state->Vcc);
  67. simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
  68. local_irq_restore(flags);
  69. return -1;
  70. }
  71. local_irq_restore(flags);
  72. return 0;
  73. }
  74. static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
  75. {
  76. simpad_set_cs3_bit(PCMCIA_RESET);
  77. }
  78. static struct pcmcia_low_level simpad_pcmcia_ops = {
  79. .owner = THIS_MODULE,
  80. .hw_init = simpad_pcmcia_hw_init,
  81. .hw_shutdown = simpad_pcmcia_hw_shutdown,
  82. .socket_state = simpad_pcmcia_socket_state,
  83. .configure_socket = simpad_pcmcia_configure_socket,
  84. .socket_suspend = simpad_pcmcia_socket_suspend,
  85. };
  86. int pcmcia_simpad_init(struct device *dev)
  87. {
  88. int ret = -ENODEV;
  89. if (machine_is_simpad())
  90. ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
  91. return ret;
  92. }