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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>
34#include <linux/gpio/consumer.h>
35#include <linux/init.h>
36#include <linux/regulator/consumer.h>
37#include <linux/slab.h>
38#include <linux/platform_device.h>
39
40#include <pcmcia/ss.h>
41
42#include <asm/hardware/scoop.h>
43
44#include "sa1100_generic.h"
45
46static 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
53static 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
85static 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
91static 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
98int __init pcmcia_collie_init(struct device *dev);
99
100static int (*sa11x0_pcmcia_legacy_hw_init[])(struct device *dev) = {
101#if defined(CONFIG_SA1100_H3100) || defined(CONFIG_SA1100_H3600)
102 pcmcia_h3600_init,
103#endif
104#ifdef CONFIG_SA1100_SIMPAD
105 pcmcia_simpad_init,
106#endif
107#ifdef CONFIG_SA1100_COLLIE
108 pcmcia_collie_init,
109#endif
110};
111
112static int sa11x0_drv_pcmcia_legacy_probe(struct platform_device *dev)
113{
114 int i, ret = -ENODEV;
115
116 /*
117 * Initialise any "on-board" PCMCIA sockets.
118 */
119 for (i = 0; i < ARRAY_SIZE(sa11x0_pcmcia_legacy_hw_init); i++) {
120 ret = sa11x0_pcmcia_legacy_hw_init[i](&dev->dev);
121 if (ret == 0)
122 break;
123 }
124
125 return ret;
126}
127
128static int sa11x0_drv_pcmcia_legacy_remove(struct platform_device *dev)
129{
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
138 return 0;
139}
140
141static 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
166static 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
177 return 0;
178}
179
180static struct platform_driver sa11x0_pcmcia_driver = {
181 .driver = {
182 .name = "sa11x0-pcmcia",
183 },
184 .probe = sa11x0_drv_pcmcia_probe,
185 .remove = sa11x0_drv_pcmcia_remove,
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 */
196static int __init sa11x0_pcmcia_init(void)
197{
198 return platform_driver_register(&sa11x0_pcmcia_driver);
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 */
206static void __exit sa11x0_pcmcia_exit(void)
207{
208 platform_driver_unregister(&sa11x0_pcmcia_driver);
209}
210
211MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
212MODULE_DESCRIPTION("Linux PCMCIA Card Services: SA-11x0 Socket Controller");
213MODULE_LICENSE("Dual MPL/GPL");
214
215fs_initcall(sa11x0_pcmcia_init);
216module_exit(sa11x0_pcmcia_exit);
217

Warning: That file was not part of the compilation database. It may have many parsing errors.