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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
95244306 PP |
2 | /* |
3 | * Copyright (C) 2012 Paul Parsons <lost.distance@yahoo.com> | |
95244306 PP |
4 | */ |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/platform_device.h> | |
8 | #include <linux/err.h> | |
9 | #include <linux/gpio.h> | |
10 | #include <linux/irq.h> | |
11 | ||
12 | #include <asm/mach-types.h> | |
13 | #include <mach/hx4700.h> | |
14 | ||
15 | #include "soc_common.h" | |
16 | ||
17 | static struct gpio gpios[] = { | |
18 | { GPIO114_HX4700_CF_RESET, GPIOF_OUT_INIT_LOW, "CF reset" }, | |
19 | { EGPIO4_CF_3V3_ON, GPIOF_OUT_INIT_LOW, "CF 3.3V enable" }, | |
20 | }; | |
21 | ||
22 | static int hx4700_pcmcia_hw_init(struct soc_pcmcia_socket *skt) | |
23 | { | |
24 | int ret; | |
25 | ||
26 | ret = gpio_request_array(gpios, ARRAY_SIZE(gpios)); | |
27 | if (ret) | |
28 | goto out; | |
29 | ||
30 | /* | |
31 | * IRQ type must be set before soc_pcmcia_hw_init() calls request_irq(). | |
32 | * The asic3 default IRQ type is level trigger low level detect, exactly | |
33 | * the the signal present on GPIOD4_CF_nCD when a CF card is inserted. | |
34 | * If the IRQ type is not changed, the asic3 interrupt handler will loop | |
35 | * repeatedly because it is unable to clear the level trigger interrupt. | |
36 | */ | |
37 | irq_set_irq_type(gpio_to_irq(GPIOD4_CF_nCD), IRQ_TYPE_EDGE_BOTH); | |
38 | ||
39 | skt->stat[SOC_STAT_CD].gpio = GPIOD4_CF_nCD; | |
40 | skt->stat[SOC_STAT_CD].name = "PCMCIA CD"; | |
41 | skt->stat[SOC_STAT_RDY].gpio = GPIO60_HX4700_CF_RNB; | |
42 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; | |
43 | ||
44 | out: | |
45 | return ret; | |
46 | } | |
47 | ||
48 | static void hx4700_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
49 | { | |
50 | gpio_free_array(gpios, ARRAY_SIZE(gpios)); | |
51 | } | |
52 | ||
53 | static void hx4700_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
54 | struct pcmcia_state *state) | |
55 | { | |
56 | state->vs_3v = 1; | |
57 | state->vs_Xv = 0; | |
58 | } | |
59 | ||
60 | static int hx4700_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
61 | const socket_state_t *state) | |
62 | { | |
63 | switch (state->Vcc) { | |
64 | case 0: | |
65 | gpio_set_value(EGPIO4_CF_3V3_ON, 0); | |
66 | break; | |
67 | case 33: | |
68 | gpio_set_value(EGPIO4_CF_3V3_ON, 1); | |
69 | break; | |
70 | default: | |
71 | printk(KERN_ERR "pcmcia: Unsupported Vcc: %d\n", state->Vcc); | |
72 | return -EINVAL; | |
73 | } | |
74 | ||
75 | gpio_set_value(GPIO114_HX4700_CF_RESET, (state->flags & SS_RESET) != 0); | |
76 | ||
77 | return 0; | |
78 | } | |
79 | ||
80 | static struct pcmcia_low_level hx4700_pcmcia_ops = { | |
81 | .owner = THIS_MODULE, | |
82 | .nr = 1, | |
83 | .hw_init = hx4700_pcmcia_hw_init, | |
84 | .hw_shutdown = hx4700_pcmcia_hw_shutdown, | |
85 | .socket_state = hx4700_pcmcia_socket_state, | |
86 | .configure_socket = hx4700_pcmcia_configure_socket, | |
87 | }; | |
88 | ||
89 | static struct platform_device *hx4700_pcmcia_device; | |
90 | ||
91 | static int __init hx4700_pcmcia_init(void) | |
92 | { | |
93 | struct platform_device *pdev; | |
94 | ||
95 | if (!machine_is_h4700()) | |
96 | return -ENODEV; | |
97 | ||
98 | pdev = platform_device_register_data(NULL, "pxa2xx-pcmcia", -1, | |
99 | &hx4700_pcmcia_ops, sizeof(hx4700_pcmcia_ops)); | |
100 | if (IS_ERR(pdev)) | |
101 | return PTR_ERR(pdev); | |
102 | ||
103 | hx4700_pcmcia_device = pdev; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static void __exit hx4700_pcmcia_exit(void) | |
109 | { | |
110 | platform_device_unregister(hx4700_pcmcia_device); | |
111 | } | |
112 | ||
113 | module_init(hx4700_pcmcia_init); | |
114 | module_exit(hx4700_pcmcia_exit); | |
115 | ||
116 | MODULE_AUTHOR("Paul Parsons <lost.distance@yahoo.com>"); | |
117 | MODULE_DESCRIPTION("HP iPAQ hx4700 PCMCIA driver"); | |
118 | MODULE_LICENSE("GPL"); |