1// SPDX-License-Identifier: GPL-2.0
2/*
3 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
4 * Filename: sl811_cs.c
5 * Author:   Yukio Yamamoto
6 *
7 *  Port to sl811-hcd and 2.6.x by
8 *    Botond Botyanszki <boti@rocketmail.com>
9 *    Simon Pickering
10 *
11 *  Last update: 2005-05-12
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/ptrace.h>
17#include <linux/slab.h>
18#include <linux/string.h>
19#include <linux/timer.h>
20#include <linux/ioport.h>
21#include <linux/platform_device.h>
22
23#include <pcmcia/cistpl.h>
24#include <pcmcia/cisreg.h>
25#include <pcmcia/ds.h>
26
27#include <linux/usb/sl811.h>
28
29MODULE_AUTHOR("Botond Botyanszki");
30MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
31MODULE_LICENSE("GPL");
32
33
34/*====================================================================*/
35/* MACROS                                                             */
36/*====================================================================*/
37
38#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
39
40/*====================================================================*/
41/* VARIABLES                                                          */
42/*====================================================================*/
43
44typedef struct local_info_t {
45	struct pcmcia_device	*p_dev;
46} local_info_t;
47
48static void sl811_cs_release(struct pcmcia_device * link);
49
50/*====================================================================*/
51
52static void release_platform_dev(struct device * dev)
53{
54	dev_dbg(dev, "sl811_cs platform_dev release\n");
55	dev->parent = NULL;
56}
57
58static struct sl811_platform_data platform_data = {
59	.potpg		= 100,
60	.power		= 50,		/* == 100mA */
61	// .reset	= ... FIXME:  invoke CF reset on the card
62};
63
64static struct resource resources[] = {
65	[0] = {
66		.flags	= IORESOURCE_IRQ,
67	},
68	[1] = {
69		// .name   = "address",
70		.flags	= IORESOURCE_IO,
71	},
72	[2] = {
73		// .name   = "data",
74		.flags	= IORESOURCE_IO,
75	},
76};
77
78extern struct platform_driver sl811h_driver;
79
80static struct platform_device platform_dev = {
81	.id			= -1,
82	.dev = {
83		.platform_data = &platform_data,
84		.release       = release_platform_dev,
85	},
86	.resource		= resources,
87	.num_resources		= ARRAY_SIZE(resources),
88};
89
90static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
91			 int irq)
92{
93	if (platform_dev.dev.parent)
94		return -EBUSY;
95	platform_dev.dev.parent = parent;
96
97	/* finish setting up the platform device */
98	resources[0].start = irq;
99
100	resources[1].start = base_addr;
101	resources[1].end = base_addr;
102
103	resources[2].start = base_addr + 1;
104	resources[2].end   = base_addr + 1;
105
106	/* The driver core will probe for us.  We know sl811-hcd has been
107	 * initialized already because of the link order dependency created
108	 * by referencing "sl811h_driver".
109	 */
110	platform_dev.name = sl811h_driver.driver.name;
111	return platform_device_register(&platform_dev);
112}
113
114/*====================================================================*/
115
116static void sl811_cs_detach(struct pcmcia_device *link)
117{
118	dev_dbg(&link->dev, "sl811_cs_detach\n");
119
120	sl811_cs_release(link);
121
122	/* This points to the parent local_info_t struct */
123	kfree(link->priv);
124}
125
126static void sl811_cs_release(struct pcmcia_device * link)
127{
128	dev_dbg(&link->dev, "sl811_cs_release\n");
129
130	pcmcia_disable_device(link);
131	platform_device_unregister(&platform_dev);
132}
133
134static int sl811_cs_config_check(struct pcmcia_device *p_dev, void *priv_data)
135{
136	if (p_dev->config_index == 0)
137		return -EINVAL;
138
139	return pcmcia_request_io(p_dev);
140}
141
142
143static int sl811_cs_config(struct pcmcia_device *link)
144{
145	struct device		*parent = &link->dev;
146	int			ret;
147
148	dev_dbg(&link->dev, "sl811_cs_config\n");
149
150	link->config_flags |= CONF_ENABLE_IRQ |	CONF_AUTO_SET_VPP |
151		CONF_AUTO_CHECK_VCC | CONF_AUTO_SET_IO;
152
153	if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
154		goto failed;
155
156	/* require an IRQ and two registers */
157	if (resource_size(link->resource[0]) < 2)
158		goto failed;
159
160	if (!link->irq)
161		goto failed;
162
163	ret = pcmcia_enable_device(link);
164	if (ret)
165		goto failed;
166
167	if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
168			< 0) {
169failed:
170		printk(KERN_WARNING "sl811_cs_config failed\n");
171		sl811_cs_release(link);
172		return  -ENODEV;
173	}
174	return 0;
175}
176
177static int sl811_cs_probe(struct pcmcia_device *link)
178{
179	local_info_t *local;
180
181	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
182	if (!local)
183		return -ENOMEM;
184	local->p_dev = link;
185	link->priv = local;
186
187	return sl811_cs_config(link);
188}
189
190static const struct pcmcia_device_id sl811_ids[] = {
191	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
192	PCMCIA_DEVICE_NULL,
193};
194MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
195
196static struct pcmcia_driver sl811_cs_driver = {
197	.owner		= THIS_MODULE,
198	.name		= "sl811_cs",
199	.probe		= sl811_cs_probe,
200	.remove		= sl811_cs_detach,
201	.id_table	= sl811_ids,
202};
203module_pcmcia_driver(sl811_cs_driver);
204