tjh.dev
Linux kernel mirror (for testing)
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kernel
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linux
1/*
2 * PCMCIA driver for SL811HS (as found in REX-CFU1U)
3 * Filename: sl811_cs.c
4 * Author: Yukio Yamamoto
5 *
6 * Port to sl811-hcd and 2.6.x by
7 * Botond Botyanszki <boti@rocketmail.com>
8 * Simon Pickering
9 *
10 * Last update: 2005-05-12
11 */
12
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/init.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/cs.h>
24#include <pcmcia/cistpl.h>
25#include <pcmcia/cisreg.h>
26#include <pcmcia/ds.h>
27
28#include <linux/usb/sl811.h>
29
30MODULE_AUTHOR("Botond Botyanszki");
31MODULE_DESCRIPTION("REX-CFU1U PCMCIA driver for 2.6");
32MODULE_LICENSE("GPL");
33
34
35/*====================================================================*/
36/* MACROS */
37/*====================================================================*/
38
39#define INFO(args...) printk(KERN_INFO "sl811_cs: " args)
40
41/*====================================================================*/
42/* VARIABLES */
43/*====================================================================*/
44
45typedef struct local_info_t {
46 struct pcmcia_device *p_dev;
47} local_info_t;
48
49static void sl811_cs_release(struct pcmcia_device * link);
50
51/*====================================================================*/
52
53static void release_platform_dev(struct device * dev)
54{
55 dev_dbg(dev, "sl811_cs platform_dev release\n");
56 dev->parent = NULL;
57}
58
59static struct sl811_platform_data platform_data = {
60 .potpg = 100,
61 .power = 50, /* == 100mA */
62 // .reset = ... FIXME: invoke CF reset on the card
63};
64
65static struct resource resources[] = {
66 [0] = {
67 .flags = IORESOURCE_IRQ,
68 },
69 [1] = {
70 // .name = "address",
71 .flags = IORESOURCE_IO,
72 },
73 [2] = {
74 // .name = "data",
75 .flags = IORESOURCE_IO,
76 },
77};
78
79extern struct platform_driver sl811h_driver;
80
81static struct platform_device platform_dev = {
82 .id = -1,
83 .dev = {
84 .platform_data = &platform_data,
85 .release = release_platform_dev,
86 },
87 .resource = resources,
88 .num_resources = ARRAY_SIZE(resources),
89};
90
91static int sl811_hc_init(struct device *parent, resource_size_t base_addr,
92 int irq)
93{
94 if (platform_dev.dev.parent)
95 return -EBUSY;
96 platform_dev.dev.parent = parent;
97
98 /* finish seting up the platform device */
99 resources[0].start = irq;
100
101 resources[1].start = base_addr;
102 resources[1].end = base_addr;
103
104 resources[2].start = base_addr + 1;
105 resources[2].end = base_addr + 1;
106
107 /* The driver core will probe for us. We know sl811-hcd has been
108 * initialized already because of the link order dependency created
109 * by referencing "sl811h_driver".
110 */
111 platform_dev.name = sl811h_driver.driver.name;
112 return platform_device_register(&platform_dev);
113}
114
115/*====================================================================*/
116
117static void sl811_cs_detach(struct pcmcia_device *link)
118{
119 dev_dbg(&link->dev, "sl811_cs_detach\n");
120
121 sl811_cs_release(link);
122
123 /* This points to the parent local_info_t struct */
124 kfree(link->priv);
125}
126
127static void sl811_cs_release(struct pcmcia_device * link)
128{
129 dev_dbg(&link->dev, "sl811_cs_release\n");
130
131 pcmcia_disable_device(link);
132 platform_device_unregister(&platform_dev);
133}
134
135static int sl811_cs_config_check(struct pcmcia_device *p_dev,
136 cistpl_cftable_entry_t *cfg,
137 cistpl_cftable_entry_t *dflt,
138 unsigned int vcc,
139 void *priv_data)
140{
141 if (cfg->index == 0)
142 return -ENODEV;
143
144 /* Use power settings for Vcc and Vpp if present */
145 /* Note that the CIS values need to be rescaled */
146 if (cfg->vcc.present & (1<<CISTPL_POWER_VNOM)) {
147 if (cfg->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
148 return -ENODEV;
149 } else if (dflt->vcc.present & (1<<CISTPL_POWER_VNOM)) {
150 if (dflt->vcc.param[CISTPL_POWER_VNOM]/10000 != vcc)
151 return -ENODEV;
152 }
153
154 if (cfg->vpp1.present & (1<<CISTPL_POWER_VNOM))
155 p_dev->conf.Vpp =
156 cfg->vpp1.param[CISTPL_POWER_VNOM]/10000;
157 else if (dflt->vpp1.present & (1<<CISTPL_POWER_VNOM))
158 p_dev->conf.Vpp =
159 dflt->vpp1.param[CISTPL_POWER_VNOM]/10000;
160
161 /* we need an interrupt */
162 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
163
164 /* IO window settings */
165 p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
166 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
167 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
168 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
169
170 p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_8;
171 p_dev->resource[0]->start = io->win[0].base;
172 p_dev->resource[0]->end = io->win[0].len;
173
174 return pcmcia_request_io(p_dev);
175 }
176 pcmcia_disable_device(p_dev);
177 return -ENODEV;
178}
179
180
181static int sl811_cs_config(struct pcmcia_device *link)
182{
183 struct device *parent = &link->dev;
184 int ret;
185
186 dev_dbg(&link->dev, "sl811_cs_config\n");
187
188 if (pcmcia_loop_config(link, sl811_cs_config_check, NULL))
189 goto failed;
190
191 /* require an IRQ and two registers */
192 if (resource_size(link->resource[0]) < 2)
193 goto failed;
194
195 if (!link->irq)
196 goto failed;
197
198 ret = pcmcia_request_configuration(link, &link->conf);
199 if (ret)
200 goto failed;
201
202 dev_info(&link->dev, "index 0x%02x: ",
203 link->conf.ConfigIndex);
204 if (link->conf.Vpp)
205 printk(", Vpp %d.%d", link->conf.Vpp/10, link->conf.Vpp%10);
206 printk(", irq %d", link->irq);
207 printk(", io %pR", link->resource[0]);
208 printk("\n");
209
210 if (sl811_hc_init(parent, link->resource[0]->start, link->irq)
211 < 0) {
212failed:
213 printk(KERN_WARNING "sl811_cs_config failed\n");
214 sl811_cs_release(link);
215 return -ENODEV;
216 }
217 return 0;
218}
219
220static int sl811_cs_probe(struct pcmcia_device *link)
221{
222 local_info_t *local;
223
224 local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
225 if (!local)
226 return -ENOMEM;
227 local->p_dev = link;
228 link->priv = local;
229
230 link->conf.Attributes = 0;
231 link->conf.IntType = INT_MEMORY_AND_IO;
232
233 return sl811_cs_config(link);
234}
235
236static struct pcmcia_device_id sl811_ids[] = {
237 PCMCIA_DEVICE_MANF_CARD(0xc015, 0x0001), /* RATOC USB HOST CF+ Card */
238 PCMCIA_DEVICE_NULL,
239};
240MODULE_DEVICE_TABLE(pcmcia, sl811_ids);
241
242static struct pcmcia_driver sl811_cs_driver = {
243 .owner = THIS_MODULE,
244 .drv = {
245 .name = "sl811_cs",
246 },
247 .probe = sl811_cs_probe,
248 .remove = sl811_cs_detach,
249 .id_table = sl811_ids,
250};
251
252/*====================================================================*/
253
254static int __init init_sl811_cs(void)
255{
256 return pcmcia_register_driver(&sl811_cs_driver);
257}
258module_init(init_sl811_cs);
259
260static void __exit exit_sl811_cs(void)
261{
262 pcmcia_unregister_driver(&sl811_cs_driver);
263}
264module_exit(exit_sl811_cs);