drivers/pcmcia/sa1111_jornada720.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * drivers/pcmcia/sa1100_jornada720.c
   4  *
   5  * Jornada720 PCMCIA specific routines
   6  *
   7  */
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/device.h>
  11 #include <linux/errno.h>
  12 #include <linux/init.h>
  13 #include <linux/io.h>
  14
  15 #include <mach/hardware.h>
  16 #include <asm/hardware/sa1111.h>
  17 #include <asm/mach-types.h>
  18
  19 #include "sa1111_generic.h"
  20
  21 /* Does SOCKET1_3V actually do anything? */
  22 #define SOCKET0_POWER   GPIO_GPIO0
  23 #define SOCKET0_3V      GPIO_GPIO2
  24 #define SOCKET1_POWER   (GPIO_GPIO1 | GPIO_GPIO3)
  25 #define SOCKET1_3V      GPIO_GPIO3
  26
  27 static int
  28 jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  29 {
  30         struct sa1111_pcmcia_socket *s = to_skt(skt);
  31         unsigned int pa_dwr_mask, pa_dwr_set;
  32         int ret;
  33
  34         printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d\n", __func__,
  35                 skt->nr, state->Vcc, state->Vpp);
  36
  37         switch (skt->nr) {
  38         case 0:
  39                 pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  40
  41                 switch (state->Vcc) {
  42                 default:
  43                 case  0:
  44                         pa_dwr_set = 0;
  45                         break;
  46                 case 33:
  47                         pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;
  48                         break;
  49                 case 50:
  50                         pa_dwr_set = SOCKET0_POWER;
  51                         break;
  52                 }
  53                 break;
  54
  55         case 1:
  56                 pa_dwr_mask = SOCKET1_POWER;
  57
  58                 switch (state->Vcc) {
  59                 default:
  60                 case 0:
  61                         pa_dwr_set = 0;
  62                         break;
  63                 case 33:
  64                         pa_dwr_set = SOCKET1_POWER;
  65                         break;
  66                 case 50:
  67                         pa_dwr_set = SOCKET1_POWER;
  68                         break;
  69                 }
  70                 break;
  71
  72         default:
  73                 return -1;
  74         }
  75
  76         if (state->Vpp != state->Vcc && state->Vpp != 0) {
  77                 printk(KERN_ERR "%s(): slot cannot support VPP %u\n",
  78                         __func__, state->Vpp);
  79                 return -EPERM;
  80         }
  81
  82         ret = sa1111_pcmcia_configure_socket(skt, state);
  83         if (ret == 0)
  84                 sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
  85
  86         return ret;
  87 }
  88
  89 static struct pcmcia_low_level jornada720_pcmcia_ops = {
  90         .owner                  = THIS_MODULE,
  91         .configure_socket       = jornada720_pcmcia_configure_socket,
  92         .first                  = 0,
  93         .nr                     = 2,
  94 };
  95
  96 int pcmcia_jornada720_init(struct sa1111_dev *sadev)
  97 {
  98         unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
  99
 100         /* Fixme: why messing around with SA11x0's GPIO1? */
 101         GRER |= 0x00000002;
 102
 103         /* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
 104         sa1111_set_io_dir(sadev, pin, 0, 0);
 105         sa1111_set_io(sadev, pin, 0);
 106         sa1111_set_sleep_io(sadev, pin, 0);
 107
 108         sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
 109         return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
 110                                  sa11xx_drv_pcmcia_add_one);
 111 }