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 
29 MODULE_AUTHOR("Botond Botyanszki");
30 MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
31 MODULE_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 
44 typedef struct local_info_t {
45 	struct pcmcia_device	*p_dev;
46 } local_info_t;
47 
48 static void sl811_cs_release(struct pcmcia_device * link);
49 
50 /*====================================================================*/
51 
release_platform_dev(struct device * dev)52 static void release_platform_dev(struct device * dev)
53 {
54 	dev_dbg(dev, "sl811_cs platform_dev release\n");
55 	dev->parent = NULL;
56 }
57 
58 static struct sl811_platform_data platform_data = {
59 	.potpg		= 100,
60 	.power		= 50,		/* == 100mA */
61 	// .reset	= ... FIXME:  invoke CF reset on the card
62 };
63 
64 static 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 
78 extern struct platform_driver sl811h_driver;
79 
80 static 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 
sl811_hc_init(struct device * parent,resource_size_t base_addr,int irq)90 static 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 
sl811_cs_detach(struct pcmcia_device * link)116 static 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 
sl811_cs_release(struct pcmcia_device * link)126 static 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 
sl811_cs_config_check(struct pcmcia_device * p_dev,void * priv_data)134 static 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 
sl811_cs_config(struct pcmcia_device * link)143 static 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) {
169 failed:
170 		printk(KERN_WARNING "sl811_cs_config failed\n");
171 		sl811_cs_release(link);
172 		return  -ENODEV;
173 	}
174 	return 0;
175 }
176 
sl811_cs_probe(struct pcmcia_device * link)177 static 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 
190 static const struct pcmcia_device_id sl811_ids[] = {
191 	PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
192 	PCMCIA_DEVICE_NULL,
193 };
194 MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
195 
196 static 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 };
203 module_pcmcia_driver(sl811_cs_driver);
204