Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
36d618be MV |
2 | /* |
3 | * linux/drivers/pcmcia/pxa2xx_palmtc.c | |
4 | * | |
5 | * Driver for Palm Tungsten|C PCMCIA | |
6 | * | |
7 | * Copyright (C) 2008 Alex Osborne <ato@meshy.org> | |
9ed3fbf1 | 8 | * Copyright (C) 2009-2011 Marek Vasut <marek.vasut@gmail.com> |
36d618be MV |
9 | */ |
10 | ||
11 | #include <linux/module.h> | |
12 | #include <linux/platform_device.h> | |
13 | #include <linux/gpio.h> | |
14 | #include <linux/delay.h> | |
15 | ||
16 | #include <asm/mach-types.h> | |
17 | #include <mach/palmtc.h> | |
18 | #include "soc_common.h" | |
19 | ||
ba388307 MV |
20 | static struct gpio palmtc_pcmcia_gpios[] = { |
21 | { GPIO_NR_PALMTC_PCMCIA_POWER1, GPIOF_INIT_LOW, "PCMCIA Power 1" }, | |
22 | { GPIO_NR_PALMTC_PCMCIA_POWER2, GPIOF_INIT_LOW, "PCMCIA Power 2" }, | |
23 | { GPIO_NR_PALMTC_PCMCIA_POWER3, GPIOF_INIT_LOW, "PCMCIA Power 3" }, | |
24 | { GPIO_NR_PALMTC_PCMCIA_RESET, GPIOF_INIT_HIGH,"PCMCIA Reset" }, | |
ba388307 MV |
25 | { GPIO_NR_PALMTC_PCMCIA_PWRREADY, GPIOF_IN, "PCMCIA Power Ready" }, |
26 | }; | |
27 | ||
36d618be MV |
28 | static int palmtc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
29 | { | |
30 | int ret; | |
31 | ||
ba388307 MV |
32 | ret = gpio_request_array(palmtc_pcmcia_gpios, |
33 | ARRAY_SIZE(palmtc_pcmcia_gpios)); | |
36d618be | 34 | |
a9bb5a4b RK |
35 | skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTC_PCMCIA_READY; |
36 | skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready"; | |
36d618be | 37 | |
36d618be MV |
38 | return ret; |
39 | } | |
40 | ||
41 | static void palmtc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
42 | { | |
ba388307 | 43 | gpio_free_array(palmtc_pcmcia_gpios, ARRAY_SIZE(palmtc_pcmcia_gpios)); |
36d618be MV |
44 | } |
45 | ||
46 | static void palmtc_pcmcia_socket_state(struct soc_pcmcia_socket *skt, | |
47 | struct pcmcia_state *state) | |
48 | { | |
49 | state->detect = 1; /* always inserted */ | |
36d618be MV |
50 | state->vs_3v = 1; |
51 | state->vs_Xv = 0; | |
52 | } | |
53 | ||
54 | static int palmtc_wifi_powerdown(void) | |
55 | { | |
56 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
57 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 0); | |
58 | mdelay(40); | |
59 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 0); | |
60 | return 0; | |
61 | } | |
62 | ||
63 | static int palmtc_wifi_powerup(void) | |
64 | { | |
65 | int timeout = 50; | |
66 | ||
67 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 1); | |
68 | mdelay(50); | |
69 | ||
70 | /* Power up the card, 1.8V first, after a while 3.3V */ | |
71 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER1, 1); | |
72 | mdelay(100); | |
73 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER2, 1); | |
74 | ||
75 | /* Wait till the card is ready */ | |
76 | while (!gpio_get_value(GPIO_NR_PALMTC_PCMCIA_PWRREADY) && | |
77 | timeout) { | |
78 | mdelay(1); | |
79 | timeout--; | |
80 | } | |
81 | ||
82 | /* Power down the WiFi in case of error */ | |
83 | if (!timeout) { | |
84 | palmtc_wifi_powerdown(); | |
85 | return 1; | |
86 | } | |
87 | ||
88 | /* Reset the card */ | |
89 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 1); | |
90 | mdelay(20); | |
91 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_RESET, 0); | |
92 | mdelay(25); | |
93 | ||
94 | gpio_set_value(GPIO_NR_PALMTC_PCMCIA_POWER3, 0); | |
95 | ||
96 | return 0; | |
97 | } | |
98 | ||
99 | static int palmtc_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, | |
100 | const socket_state_t *state) | |
101 | { | |
6cf4442f | 102 | int ret = 1; |
36d618be MV |
103 | |
104 | if (state->Vcc == 0) | |
105 | ret = palmtc_wifi_powerdown(); | |
106 | else if (state->Vcc == 33) | |
107 | ret = palmtc_wifi_powerup(); | |
108 | ||
109 | return ret; | |
110 | } | |
111 | ||
36d618be MV |
112 | static struct pcmcia_low_level palmtc_pcmcia_ops = { |
113 | .owner = THIS_MODULE, | |
114 | ||
115 | .first = 0, | |
116 | .nr = 1, | |
117 | ||
118 | .hw_init = palmtc_pcmcia_hw_init, | |
119 | .hw_shutdown = palmtc_pcmcia_hw_shutdown, | |
120 | ||
121 | .socket_state = palmtc_pcmcia_socket_state, | |
122 | .configure_socket = palmtc_pcmcia_configure_socket, | |
36d618be MV |
123 | }; |
124 | ||
125 | static struct platform_device *palmtc_pcmcia_device; | |
126 | ||
127 | static int __init palmtc_pcmcia_init(void) | |
128 | { | |
129 | int ret; | |
130 | ||
131 | if (!machine_is_palmtc()) | |
132 | return -ENODEV; | |
133 | ||
134 | palmtc_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1); | |
135 | if (!palmtc_pcmcia_device) | |
136 | return -ENOMEM; | |
137 | ||
138 | ret = platform_device_add_data(palmtc_pcmcia_device, &palmtc_pcmcia_ops, | |
139 | sizeof(palmtc_pcmcia_ops)); | |
140 | ||
141 | if (!ret) | |
142 | ret = platform_device_add(palmtc_pcmcia_device); | |
143 | ||
144 | if (ret) | |
145 | platform_device_put(palmtc_pcmcia_device); | |
146 | ||
147 | return ret; | |
148 | } | |
149 | ||
150 | static void __exit palmtc_pcmcia_exit(void) | |
151 | { | |
152 | platform_device_unregister(palmtc_pcmcia_device); | |
153 | } | |
154 | ||
155 | module_init(palmtc_pcmcia_init); | |
156 | module_exit(palmtc_pcmcia_exit); | |
157 | ||
158 | MODULE_AUTHOR("Alex Osborne <ato@meshy.org>," | |
159 | " Marek Vasut <marek.vasut@gmail.com>"); | |
160 | MODULE_DESCRIPTION("PCMCIA support for Palm Tungsten|C"); | |
161 | MODULE_ALIAS("platform:pxa2xx-pcmcia"); | |
162 | MODULE_LICENSE("GPL"); |