1 /*
2 * BCMSDH Function Driver for the native SDIO/MMC driver in the Linux Kernel
3 *
4 * Copyright (C) 1999-2009, Broadcom Corporation
5 *
6 * Unless you and Broadcom execute a separate written software license
7 * agreement governing use of this software, this software is licensed to you
8 * under the terms of the GNU General Public License version 2 (the "GPL"),
9 * available at http://www.broadcom.com/licenses/GPLv2.php, with the
10 * following added to such license:
11 *
12 * As a special exception, the copyright holders of this software give you
13 * permission to link this software with independent modules, and to copy and
14 * distribute the resulting executable under terms of your choice, provided that
15 * you also meet, for each linked independent module, the terms and conditions of
16 * the license of that module. An independent module is a module which is not
17 * derived from this software. The special exception does not apply to any
18 * modifications of the software.
19 *
20 * Notwithstanding the above, under no circumstances may you combine this
21 * software in any way with any other Broadcom software provided under a license
22 * other than the GPL, without Broadcom's express prior written consent.
23 *
24 * $Id: bcmsdh_sdmmc_linux.c,v 1.1.2.5.6.10 2009/10/14 04:32:13 Exp $
25 */
26
27 #include <typedefs.h>
28 #include <bcmutils.h>
29 #include <sdio.h> /* SDIO Specs */
30 #include <bcmsdbus.h> /* bcmsdh to/from specific controller APIs */
31 #include <sdiovar.h> /* to get msglevel bit values */
32
33 #include <linux/sched.h> /* request_irq() */
34
35 #include <linux/mmc/core.h>
36 #include <linux/mmc/card.h>
37 #include <linux/mmc/sdio_func.h>
38 #include <linux/mmc/sdio_ids.h>
39
40 #if !defined(SDIO_VENDOR_ID_BROADCOM)
41 #define SDIO_VENDOR_ID_BROADCOM 0x02d0
42 #endif /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
43 #if !defined(SDIO_DEVICE_ID_BROADCOM_4325)
44 #define SDIO_DEVICE_ID_BROADCOM_4325 0x0000
45 #endif /* !defined(SDIO_DEVICE_ID_BROADCOM_4325) */
46 #if !defined(SDIO_DEVICE_ID_BROADCOM_4329)
47 #define SDIO_DEVICE_ID_BROADCOM_4329 0x4329
48 #endif /* !defined(SDIO_DEVICE_ID_BROADCOM_4329) */
49
50 #include <bcmsdh_sdmmc.h>
51
52 #include <dhd_dbg.h>
53
54
55 extern void sdioh_sdmmc_devintr_off(sdioh_info_t *sd);
56 extern void sdioh_sdmmc_devintr_on(sdioh_info_t *sd);
57
58 int sdio_function_init(void);
59 void sdio_function_cleanup(void);
60
61 #define DESCRIPTION "bcmsdh_sdmmc Driver"
62 #define AUTHOR "Broadcom Corporation"
63
64 /* module param defaults */
65 static int clockoverride = 0;
66
67 module_param(clockoverride, int, 0644);
68 MODULE_PARM_DESC(clockoverride, "SDIO card clock override");
69
70 PBCMSDH_SDMMC_INSTANCE gInstance;
71
72 /* Maximum number of bcmsdh_sdmmc devices supported by driver */
73 #define BCMSDH_SDMMC_MAX_DEVICES 1
74
75 extern int bcmsdh_probe(struct device *dev);
76 extern int bcmsdh_remove(struct device *dev);
77 struct device sdmmc_dev;
78
79
bcmsdh_sdmmc_probe(struct sdio_func * func,const struct sdio_device_id * id)80 static int bcmsdh_sdmmc_probe(struct sdio_func *func,
81 const struct sdio_device_id *id)
82 {
83 int ret = 0;
84 sd_trace(("bcmsdh_sdmmc: %s Enter\n", __FUNCTION__));
85 sd_trace(("sdio_bcmsdh: func->class=%x\n", func->class));
86 sd_trace(("sdio_vendor: 0x%04x\n", func->vendor));
87 sd_trace(("sdio_device: 0x%04x\n", func->device));
88 sd_trace(("Function#: 0x%04x\n", func->num));
89
90 if (func->num == 1) {
91 /* Keep a copy of F1's 'func' in F0, just in case... */
92 gInstance->func[0] = func;
93 if(func->device == 0x4) { /* 4318 */
94 gInstance->func[2] = NULL;
95 sd_trace(("NIC found, calling bcmsdh_probe...\n"));
96 ret = bcmsdh_probe(&sdmmc_dev);
97 }
98 }
99
100 gInstance->func[func->num] = func;
101
102 if (func->num == 2) {
103 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
104 ret = bcmsdh_probe(&sdmmc_dev);
105 }
106
107 return ret;
108 }
109
bcmsdh_sdmmc_remove(struct sdio_func * func)110 static void bcmsdh_sdmmc_remove(struct sdio_func *func)
111 {
112 sd_trace(("bcmsdh_sdmmc: %s Enter\n", __FUNCTION__));
113 sd_info(("sdio_bcmsdh: func->class=%x\n", func->class));
114 sd_info(("sdio_vendor: 0x%04x\n", func->vendor));
115 sd_info(("sdio_device: 0x%04x\n", func->device));
116 sd_info(("Function#: 0x%04x\n", func->num));
117
118 if (func->num == 2) {
119 sd_trace(("F2 found, calling bcmsdh_probe...\n"));
120 bcmsdh_remove(&sdmmc_dev);
121 }
122 }
123
124
125 /* devices we support, null terminated */
126 static const struct sdio_device_id bcmsdh_sdmmc_ids[] = {
127 { SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4325) },
128 { SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329) },
129 { SDIO_DEVICE_CLASS(SDIO_CLASS_NONE) },
130 { /* end: all zeroes */ },
131 };
132
133 MODULE_DEVICE_TABLE(sdio, bcmsdh_sdmmc_ids);
134
135 static struct sdio_driver bcmsdh_sdmmc_driver = {
136 .probe = bcmsdh_sdmmc_probe,
137 .remove = bcmsdh_sdmmc_remove,
138 .name = "bcmsdh_sdmmc",
139 .id_table = bcmsdh_sdmmc_ids,
140 };
141
142 struct sdos_info {
143 sdioh_info_t *sd;
144 spinlock_t lock;
145 };
146
147
148 int
sdioh_sdmmc_osinit(sdioh_info_t * sd)149 sdioh_sdmmc_osinit(sdioh_info_t *sd)
150 {
151 struct sdos_info *sdos;
152
153 sdos = (struct sdos_info*)MALLOC(sd->osh, sizeof(struct sdos_info));
154 sd->sdos_info = (void*)sdos;
155 if (sdos == NULL)
156 return BCME_NOMEM;
157
158 sdos->sd = sd;
159 spin_lock_init(&sdos->lock);
160 return BCME_OK;
161 }
162
163 void
sdioh_sdmmc_osfree(sdioh_info_t * sd)164 sdioh_sdmmc_osfree(sdioh_info_t *sd)
165 {
166 struct sdos_info *sdos;
167 ASSERT(sd && sd->sdos_info);
168
169 sdos = (struct sdos_info *)sd->sdos_info;
170 MFREE(sd->osh, sdos, sizeof(struct sdos_info));
171 }
172 #if defined(OOB_INTR_ONLY)
173 int
sdioh_mmc_irq(int irq)174 sdioh_mmc_irq(int irq)
175 {
176 return (MSM_GPIO_TO_INT(irq));
177 }
178 #endif /* defined(OOB_INTR_ONLY) */
179
180 /* Interrupt enable/disable */
181 SDIOH_API_RC
sdioh_interrupt_set(sdioh_info_t * sd,bool enable)182 sdioh_interrupt_set(sdioh_info_t *sd, bool enable)
183 {
184 ulong flags;
185 struct sdos_info *sdos;
186
187 sd_trace(("%s: %s\n", __FUNCTION__, enable ? "Enabling" : "Disabling"));
188
189 sdos = (struct sdos_info *)sd->sdos_info;
190 ASSERT(sdos);
191
192 #if !defined(OOB_INTR_ONLY)
193 if (enable && !(sd->intr_handler && sd->intr_handler_arg)) {
194 sd_err(("%s: no handler registered, will not enable\n", __FUNCTION__));
195 return SDIOH_API_RC_FAIL;
196 }
197 #endif /* !defined(OOB_INTR_ONLY) */
198
199 /* Ensure atomicity for enable/disable calls */
200 spin_lock_irqsave(&sdos->lock, flags);
201
202 sd->client_intr_enabled = enable;
203 if (enable) {
204 sdioh_sdmmc_devintr_on(sd);
205 } else {
206 sdioh_sdmmc_devintr_off(sd);
207 }
208
209 spin_unlock_irqrestore(&sdos->lock, flags);
210
211 return SDIOH_API_RC_SUCCESS;
212 }
213
214
215 #ifdef BCMSDH_MODULE
216 static int __init
bcmsdh_module_init(void)217 bcmsdh_module_init(void)
218 {
219 int error = 0;
220 sdio_function_init();
221 return error;
222 }
223
224 static void __exit
bcmsdh_module_cleanup(void)225 bcmsdh_module_cleanup(void)
226 {
227 sdio_function_cleanup();
228 }
229
230 module_init(bcmsdh_module_init);
231 module_exit(bcmsdh_module_cleanup);
232
233 MODULE_LICENSE("GPL v2");
234 MODULE_DESCRIPTION(DESCRIPTION);
235 MODULE_AUTHOR(AUTHOR);
236
237 #endif /* BCMSDH_MODULE */
238 /*
239 * module init
240 */
sdio_function_init(void)241 int sdio_function_init(void)
242 {
243 int error = 0;
244 sd_trace(("bcmsdh_sdmmc: %s Enter\n", __FUNCTION__));
245
246 gInstance = kzalloc(sizeof(BCMSDH_SDMMC_INSTANCE), GFP_KERNEL);
247 if (!gInstance)
248 return -ENOMEM;
249
250 bzero(&sdmmc_dev, sizeof(sdmmc_dev));
251 error = sdio_register_driver(&bcmsdh_sdmmc_driver);
252
253
254 return error;
255 }
256
257 /*
258 * module cleanup
259 */
260 extern int bcmsdh_remove(struct device *dev);
sdio_function_cleanup(void)261 void sdio_function_cleanup(void)
262 {
263 sd_trace(("%s Enter\n", __FUNCTION__));
264
265
266 sdio_unregister_driver(&bcmsdh_sdmmc_driver);
267
268 if (gInstance)
269 kfree(gInstance);
270 }
271