Eric Lee / smarc-fsl-linux-kernel

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drivers/pcmcia/sa1111_jornada720.c 2.34 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  // SPDX-License-Identifier: GPL-2.0
  /*
   * drivers/pcmcia/sa1100_jornada720.c
   *
   * Jornada720 PCMCIA specific routines
   *
   */
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/device.h>
  #include <linux/errno.h>
  #include <linux/init.h>
  #include <linux/io.h>
  
  #include <mach/hardware.h>
  #include <asm/hardware/sa1111.h>
  #include <asm/mach-types.h>
  
  #include "sa1111_generic.h"
  
  /* Does SOCKET1_3V actually do anything? */
  #define SOCKET0_POWER	GPIO_GPIO0
  #define SOCKET0_3V	GPIO_GPIO2
  #define SOCKET1_POWER	(GPIO_GPIO1 | GPIO_GPIO3)
  #define SOCKET1_3V	GPIO_GPIO3
  
  static int
  jornada720_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
  {
  	struct sa1111_pcmcia_socket *s = to_skt(skt);
  	unsigned int pa_dwr_mask, pa_dwr_set;
  	int ret;
  
  	printk(KERN_INFO "%s(): config socket %d vcc %d vpp %d
  ", __func__,
  		skt->nr, state->Vcc, state->Vpp);
  
  	switch (skt->nr) {
  	case 0:
  		pa_dwr_mask = SOCKET0_POWER | SOCKET0_3V;
  
  		switch (state->Vcc) {
  		default:
  		case  0:
  			pa_dwr_set = 0;
  			break;
  		case 33:
  			pa_dwr_set = SOCKET0_POWER | SOCKET0_3V;
  			break;
  		case 50:
  			pa_dwr_set = SOCKET0_POWER;
  			break;
  		}
  		break;
  
  	case 1:
  		pa_dwr_mask = SOCKET1_POWER;
  
  		switch (state->Vcc) {
  		default:
  		case 0:
  			pa_dwr_set = 0;
  			break;
  		case 33:
  			pa_dwr_set = SOCKET1_POWER;
  			break;
  		case 50:
  			pa_dwr_set = SOCKET1_POWER;
  			break;
  		}
  		break;
  
  	default:
  		return -1;
  	}
  
  	if (state->Vpp != state->Vcc && state->Vpp != 0) {
  		printk(KERN_ERR "%s(): slot cannot support VPP %u
  ",
  			__func__, state->Vpp);
  		return -EPERM;
  	}
  
  	ret = sa1111_pcmcia_configure_socket(skt, state);
  	if (ret == 0)
  		sa1111_set_io(s->dev, pa_dwr_mask, pa_dwr_set);
  
  	return ret;
  }
  
  static struct pcmcia_low_level jornada720_pcmcia_ops = {
  	.owner			= THIS_MODULE,
  	.configure_socket	= jornada720_pcmcia_configure_socket,
  	.first			= 0,
  	.nr			= 2,
  };
  
  int pcmcia_jornada720_init(struct sa1111_dev *sadev)
  {
  	unsigned int pin = GPIO_A0 | GPIO_A1 | GPIO_A2 | GPIO_A3;
  
  	/* Fixme: why messing around with SA11x0's GPIO1? */
  	GRER |= 0x00000002;
  
  	/* Set GPIO_A<3:1> to be outputs for PCMCIA/CF power controller: */
  	sa1111_set_io_dir(sadev, pin, 0, 0);
  	sa1111_set_io(sadev, pin, 0);
  	sa1111_set_sleep_io(sadev, pin, 0);
  
  	sa11xx_drv_pcmcia_ops(&jornada720_pcmcia_ops);
  	return sa1111_pcmcia_add(sadev, &jornada720_pcmcia_ops,
  				 sa11xx_drv_pcmcia_add_one);
  }