Eric Lee / smarc-fsl-linux-kernel

Blame view

drivers/pcmcia/pxa2xx_hx4700.c 2.91 KB
edit raw normal view history
d2912cb15   Thomas Gleixner   treewide: Replace... 
1
 
  // SPDX-License-Identifier: GPL-2.0-only
95244306f   Paul Parsons   pcmcia: add drive... 
2
3
 
  /*
   *  Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com>
95244306f   Paul Parsons   pcmcia: add drive... 
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
 
   */
  
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/err.h>
  #include <linux/gpio.h>
  #include <linux/irq.h>
  
  #include <asm/mach-types.h>
  #include <mach/hx4700.h>
  
  #include "soc_common.h"
  
  static struct gpio gpios[] = {
  	{ GPIO114_HX4700_CF_RESET,    GPIOF_OUT_INIT_LOW,   "CF reset"        },
  	{ EGPIO4_CF_3V3_ON,           GPIOF_OUT_INIT_LOW,   "CF 3.3V enable"  },
  };
  
  static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
  {
  	int ret;
  
  	ret = gpio_request_array(gpios, ARRAY_SIZE(gpios));
  	if (ret)
  		goto out;
  
  	/*
  	 * IRQ type must be set before soc_pcmcia_hw_init() calls request_irq().
  	 * The asic3 default IRQ type is level trigger low level detect, exactly
  	 * the the signal present on GPIOD4_CF_nCD when a CF card is inserted.
  	 * If the IRQ type is not changed, the asic3 interrupt handler will loop
  	 * repeatedly because it is unable to clear the level trigger interrupt.
  	 */
  	irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH);
  
  	skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD;
  	skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
  	skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB;
  	skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
  
  out:
  	return ret;
  }
  
  static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
  {
  	gpio_free_array(gpios, ARRAY_SIZE(gpios));
  }
  
  static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
  	struct pcmcia_state *state)
  {
  	state->vs_3v = 1;
  	state->vs_Xv = 0;
  }
  
  static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
  	const socket_state_t *state)
  {
  	switch (state->Vcc) {
  	case 0:
  		gpio_set_value(EGPIO4_CF_3V3_ON, 0);
  		break;
  	case 33:
  		gpio_set_value(EGPIO4_CF_3V3_ON, 1);
  		break;
  	default:
  		printk(KERN_ERR "pcmcia: Unsupported Vcc: %d
  ", state->Vcc);
  		return -EINVAL;
  	}
  
  	gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0);
  
  	return 0;
  }
  
  static struct pcmcia_low_level hx4700_pcmcia_ops = {
  	.owner          = THIS_MODULE,
  	.nr             = 1,
  	.hw_init        = hx4700_pcmcia_hw_init,
  	.hw_shutdown    = hx4700_pcmcia_hw_shutdown,
  	.socket_state   = hx4700_pcmcia_socket_state,
  	.configure_socket = hx4700_pcmcia_configure_socket,
  };
  
  static struct platform_device *hx4700_pcmcia_device;
  
  static int __init hx4700_pcmcia_init(void)
  {
  	struct platform_device *pdev;
  
  	if (!machine_is_h4700())
  		return -ENODEV;
  
  	pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1,
  		&hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops));
  	if (IS_ERR(pdev))
  		return PTR_ERR(pdev);
  
  	hx4700_pcmcia_device = pdev;
  
  	return 0;
  }
  
  static void __exit hx4700_pcmcia_exit(void)
  {
  	platform_device_unregister(hx4700_pcmcia_device);
  }
  
  module_init(hx4700_pcmcia_init);
  module_exit(hx4700_pcmcia_exit);
  
  MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>");
  MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver");
  MODULE_LICENSE("GPL");