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 | |
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 | |
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 | |
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(objp: link->priv); |
124 | } |
125 | |
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(p_dev: link); |
131 | platform_device_unregister(&platform_dev); |
132 | } |
133 | |
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 | |
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(p_dev: link, conf_check: sl811_cs_config_check, NULL)) |
154 | goto failed; |
155 | |
156 | /* require an IRQ and two registers */ |
157 | if (resource_size(res: link->resource[0]) < 2) |
158 | goto failed; |
159 | |
160 | if (!link->irq) |
161 | goto failed; |
162 | |
163 | ret = pcmcia_enable_device(p_dev: link); |
164 | if (ret) |
165 | goto failed; |
166 | |
167 | if (sl811_hc_init(parent, base_addr: link->resource[0]->start, irq: 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 | |
177 | static int sl811_cs_probe(struct pcmcia_device *link) |
178 | { |
179 | local_info_t *local; |
180 | |
181 | local = kzalloc(size: 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 | |