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1da177e4 LT |
1 | /*====================================================================== |
2 | ||
3 | Device driver for the PCMCIA control functionality of StrongARM | |
4 | SA-1100 microprocessors. | |
5 | ||
6 | The contents of this file are subject to the Mozilla Public | |
7 | License Version 1.1 (the "License"); you may not use this file | |
8 | except in compliance with the License. You may obtain a copy of | |
9 | the License at http://www.mozilla.org/MPL/ | |
10 | ||
11 | Software distributed under the License is distributed on an "AS | |
12 | IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
13 | implied. See the License for the specific language governing | |
14 | rights and limitations under the License. | |
15 | ||
16 | The initial developer of the original code is John G. Dorsey | |
17 | <john+@cs.cmu.edu>. Portions created by John G. Dorsey are | |
18 | Copyright (C) 1999 John G. Dorsey. All Rights Reserved. | |
19 | ||
20 | Alternatively, the contents of this file may be used under the | |
21 | terms of the GNU Public License version 2 (the "GPL"), in which | |
22 | case the provisions of the GPL are applicable instead of the | |
23 | above. If you wish to allow the use of your version of this file | |
24 | only under the terms of the GPL and not to allow others to use | |
25 | your version of this file under the MPL, indicate your decision | |
26 | by deleting the provisions above and replace them with the notice | |
27 | and other provisions required by the GPL. If you do not delete | |
28 | the provisions above, a recipient may use your version of this | |
29 | file under either the MPL or the GPL. | |
30 | ||
31 | ======================================================================*/ | |
32 | ||
33 | #include <linux/module.h> | |
7be893aa | 34 | #include <linux/gpio/consumer.h> |
1da177e4 | 35 | #include <linux/init.h> |
7be893aa | 36 | #include <linux/regulator/consumer.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
d052d1be | 38 | #include <linux/platform_device.h> |
1da177e4 | 39 | |
1da177e4 LT |
40 | #include <pcmcia/ss.h> |
41 | ||
77bb86a1 PM |
42 | #include <asm/hardware/scoop.h> |
43 | ||
1da177e4 LT |
44 | #include "sa1100_generic.h" |
45 | ||
7be893aa RK |
46 | static const char *sa11x0_cf_gpio_names[] = { |
47 | [SOC_STAT_CD] = "detect", | |
48 | [SOC_STAT_BVD1] = "bvd1", | |
49 | [SOC_STAT_BVD2] = "bvd2", | |
50 | [SOC_STAT_RDY] = "ready", | |
51 | }; | |
52 | ||
53 | static int sa11x0_cf_hw_init(struct soc_pcmcia_socket *skt) | |
54 | { | |
55 | struct device *dev = skt->socket.dev.parent; | |
56 | int i; | |
57 | ||
58 | skt->gpio_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); | |
59 | if (IS_ERR(skt->gpio_reset)) | |
60 | return PTR_ERR(skt->gpio_reset); | |
61 | ||
62 | skt->gpio_bus_enable = devm_gpiod_get_optional(dev, "bus-enable", | |
63 | GPIOD_OUT_HIGH); | |
64 | if (IS_ERR(skt->gpio_bus_enable)) | |
65 | return PTR_ERR(skt->gpio_bus_enable); | |
66 | ||
67 | skt->vcc.reg = devm_regulator_get_optional(dev, "vcc"); | |
68 | if (IS_ERR(skt->vcc.reg)) | |
69 | return PTR_ERR(skt->vcc.reg); | |
70 | ||
71 | if (!skt->vcc.reg) | |
72 | dev_warn(dev, | |
73 | "no Vcc regulator provided, ignoring Vcc controls\n"); | |
74 | ||
75 | for (i = 0; i < ARRAY_SIZE(sa11x0_cf_gpio_names); i++) { | |
76 | skt->stat[i].name = sa11x0_cf_gpio_names[i]; | |
77 | skt->stat[i].desc = devm_gpiod_get_optional(dev, | |
78 | sa11x0_cf_gpio_names[i], GPIOD_IN); | |
79 | if (IS_ERR(skt->stat[i].desc)) | |
80 | return PTR_ERR(skt->stat[i].desc); | |
81 | } | |
82 | return 0; | |
83 | } | |
84 | ||
85 | static int sa11x0_cf_configure_socket(struct soc_pcmcia_socket *skt, | |
86 | const socket_state_t *state) | |
87 | { | |
88 | return soc_pcmcia_regulator_set(skt, &skt->vcc, state->Vcc); | |
89 | } | |
90 | ||
91 | static struct pcmcia_low_level sa11x0_cf_ops = { | |
92 | .owner = THIS_MODULE, | |
93 | .hw_init = sa11x0_cf_hw_init, | |
94 | .socket_state = soc_common_cf_socket_state, | |
95 | .configure_socket = sa11x0_cf_configure_socket, | |
96 | }; | |
97 | ||
77bb86a1 PM |
98 | int __init pcmcia_collie_init(struct device *dev); |
99 | ||
7be893aa | 100 | static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = { |
e7435f86 | 101 | #if defined(CONFIG_SA1100_H3100) || defined(CONFIG_SA1100_H3600) |
1da177e4 LT |
102 | pcmcia_h3600_init, |
103 | #endif | |
1da177e4 LT |
104 | #ifdef CONFIG_SA1100_SIMPAD |
105 | pcmcia_simpad_init, | |
106 | #endif | |
77bb86a1 PM |
107 | #ifdef CONFIG_SA1100_COLLIE |
108 | pcmcia_collie_init, | |
109 | #endif | |
1da177e4 LT |
110 | }; |
111 | ||
7be893aa | 112 | static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev) |
1da177e4 LT |
113 | { |
114 | int i, ret = -ENODEV; | |
115 | ||
116 | /* | |
117 | * Initialise any "on-board" PCMCIA sockets. | |
118 | */ | |
7be893aa RK |
119 | for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) { |
120 | ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev); | |
1da177e4 LT |
121 | if (ret == 0) |
122 | break; | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
7be893aa | 128 | static int sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev) |
7a192ec3 | 129 | { |
be85458e RKAL |
130 | struct skt_dev_info *sinfo = platform_get_drvdata(dev); |
131 | int i; | |
132 | ||
133 | platform_set_drvdata(dev, NULL); | |
134 | ||
135 | for (i = 0; i < sinfo->nskt; i++) | |
136 | soc_pcmcia_remove_one(&sinfo->skt[i]); | |
137 | ||
7be893aa RK |
138 | return 0; |
139 | } | |
140 | ||
141 | static int sa11x0_drv_pcmcia_probe(struct platform_device *pdev) | |
142 | { | |
143 | struct soc_pcmcia_socket *skt; | |
144 | struct device *dev = &pdev->dev; | |
145 | ||
146 | if (pdev->id == -1) | |
147 | return sa11x0_drv_pcmcia_legacy_probe(pdev); | |
148 | ||
149 | skt = devm_kzalloc(dev, sizeof(*skt), GFP_KERNEL); | |
150 | if (!skt) | |
151 | return -ENOMEM; | |
152 | ||
153 | platform_set_drvdata(pdev, skt); | |
154 | ||
155 | skt->nr = pdev->id; | |
156 | skt->clk = devm_clk_get(dev, NULL); | |
157 | if (IS_ERR(skt->clk)) | |
158 | return PTR_ERR(skt->clk); | |
159 | ||
160 | sa11xx_drv_pcmcia_ops(&sa11x0_cf_ops); | |
161 | soc_pcmcia_init_one(skt, &sa11x0_cf_ops, dev); | |
162 | ||
163 | return sa11xx_drv_pcmcia_add_one(skt); | |
164 | } | |
165 | ||
166 | static int sa11x0_drv_pcmcia_remove(struct platform_device *dev) | |
167 | { | |
168 | struct soc_pcmcia_socket *skt; | |
169 | ||
170 | if (dev->id == -1) | |
171 | return sa11x0_drv_pcmcia_legacy_remove(dev); | |
172 | ||
173 | skt = platform_get_drvdata(dev); | |
174 | ||
175 | soc_pcmcia_remove_one(skt); | |
176 | ||
be85458e | 177 | return 0; |
7a192ec3 ML |
178 | } |
179 | ||
7a192ec3 ML |
180 | static struct platform_driver sa11x0_pcmcia_driver = { |
181 | .driver = { | |
182 | .name = "sa11x0-pcmcia", | |
7a192ec3 | 183 | }, |
1da177e4 | 184 | .probe = sa11x0_drv_pcmcia_probe, |
7a192ec3 | 185 | .remove = sa11x0_drv_pcmcia_remove, |
1da177e4 LT |
186 | }; |
187 | ||
188 | /* sa11x0_pcmcia_init() | |
189 | * ^^^^^^^^^^^^^^^^^^^^ | |
190 | * | |
191 | * This routine performs low-level PCMCIA initialization and then | |
192 | * registers this socket driver with Card Services. | |
193 | * | |
194 | * Returns: 0 on success, -ve error code on failure | |
195 | */ | |
196 | static int __init sa11x0_pcmcia_init(void) | |
197 | { | |
7a192ec3 | 198 | return platform_driver_register(&sa11x0_pcmcia_driver); |
1da177e4 LT |
199 | } |
200 | ||
201 | /* sa11x0_pcmcia_exit() | |
202 | * ^^^^^^^^^^^^^^^^^^^^ | |
203 | * Invokes the low-level kernel service to free IRQs associated with this | |
204 | * socket controller and reset GPIO edge detection. | |
205 | */ | |
206 | static void __exit sa11x0_pcmcia_exit(void) | |
207 | { | |
7a192ec3 | 208 | platform_driver_unregister(&sa11x0_pcmcia_driver); |
1da177e4 LT |
209 | } |
210 | ||
211 | MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); | |
212 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11x0 Socket Controller"); | |
213 | MODULE_LICENSE("Dual MPL/GPL"); | |
214 | ||
f36598ae | 215 | fs_initcall(sa11x0_pcmcia_init); |
1da177e4 | 216 | module_exit(sa11x0_pcmcia_exit); |