dm: mmc: Check that drivers have operations
[platform/kernel/u-boot.git] / drivers / mmc / mmc-uclass.c
1 /*
2  * Copyright (C) 2015 Google, Inc
3  * Written by Simon Glass <sjg@chromium.org>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <mmc.h>
10 #include <dm.h>
11 #include <dm/device-internal.h>
12 #include <dm/lists.h>
13 #include <dm/root.h>
14 #include "mmc_private.h"
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 #ifdef CONFIG_DM_MMC_OPS
19 int dm_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
20                     struct mmc_data *data)
21 {
22         struct mmc *mmc = mmc_get_mmc_dev(dev);
23         struct dm_mmc_ops *ops = mmc_get_ops(dev);
24         int ret;
25
26         mmmc_trace_before_send(mmc, cmd);
27         if (ops->send_cmd)
28                 ret = ops->send_cmd(dev, cmd, data);
29         else
30                 ret = -ENOSYS;
31         mmmc_trace_after_send(mmc, cmd, ret);
32
33         return ret;
34 }
35
36 int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
37 {
38         return dm_mmc_send_cmd(mmc->dev, cmd, data);
39 }
40
41 int dm_mmc_set_ios(struct udevice *dev)
42 {
43         struct dm_mmc_ops *ops = mmc_get_ops(dev);
44
45         if (!ops->set_ios)
46                 return -ENOSYS;
47         return ops->set_ios(dev);
48 }
49
50 int mmc_set_ios(struct mmc *mmc)
51 {
52         return dm_mmc_set_ios(mmc->dev);
53 }
54
55 int dm_mmc_get_wp(struct udevice *dev)
56 {
57         struct dm_mmc_ops *ops = mmc_get_ops(dev);
58
59         if (!ops->get_wp)
60                 return -ENOSYS;
61         return ops->get_wp(dev);
62 }
63
64 int mmc_getwp(struct mmc *mmc)
65 {
66         return dm_mmc_get_wp(mmc->dev);
67 }
68
69 int dm_mmc_get_cd(struct udevice *dev)
70 {
71         struct dm_mmc_ops *ops = mmc_get_ops(dev);
72
73         if (!ops->get_cd)
74                 return -ENOSYS;
75         return ops->get_cd(dev);
76 }
77
78 int mmc_getcd(struct mmc *mmc)
79 {
80         return dm_mmc_get_cd(mmc->dev);
81 }
82 #endif
83
84 struct mmc *mmc_get_mmc_dev(struct udevice *dev)
85 {
86         struct mmc_uclass_priv *upriv;
87
88         if (!device_active(dev))
89                 return NULL;
90         upriv = dev_get_uclass_priv(dev);
91         return upriv->mmc;
92 }
93
94 #ifdef CONFIG_BLK
95 struct mmc *find_mmc_device(int dev_num)
96 {
97         struct udevice *dev, *mmc_dev;
98         int ret;
99
100         ret = blk_get_device(IF_TYPE_MMC, dev_num, &dev);
101
102         if (ret) {
103 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
104                 printf("MMC Device %d not found\n", dev_num);
105 #endif
106                 return NULL;
107         }
108
109         mmc_dev = dev_get_parent(dev);
110
111         return mmc_get_mmc_dev(mmc_dev);
112 }
113
114 int get_mmc_num(void)
115 {
116         return max((blk_find_max_devnum(IF_TYPE_MMC) + 1), 0);
117 }
118
119 int mmc_get_next_devnum(void)
120 {
121         return blk_find_max_devnum(IF_TYPE_MMC);
122 }
123
124 struct blk_desc *mmc_get_blk_desc(struct mmc *mmc)
125 {
126         struct blk_desc *desc;
127         struct udevice *dev;
128
129         device_find_first_child(mmc->dev, &dev);
130         if (!dev)
131                 return NULL;
132         desc = dev_get_uclass_platdata(dev);
133
134         return desc;
135 }
136
137 void mmc_do_preinit(void)
138 {
139         struct udevice *dev;
140         struct uclass *uc;
141         int ret;
142
143         ret = uclass_get(UCLASS_MMC, &uc);
144         if (ret)
145                 return;
146         uclass_foreach_dev(dev, uc) {
147                 struct mmc *m = mmc_get_mmc_dev(dev);
148
149                 if (!m)
150                         continue;
151 #ifdef CONFIG_FSL_ESDHC_ADAPTER_IDENT
152                 mmc_set_preinit(m, 1);
153 #endif
154                 if (m->preinit)
155                         mmc_start_init(m);
156         }
157 }
158
159 #if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_LIBCOMMON_SUPPORT)
160 void print_mmc_devices(char separator)
161 {
162         struct udevice *dev;
163         char *mmc_type;
164         bool first = true;
165
166         for (uclass_first_device(UCLASS_MMC, &dev);
167              dev;
168              uclass_next_device(&dev), first = false) {
169                 struct mmc *m = mmc_get_mmc_dev(dev);
170
171                 if (!first) {
172                         printf("%c", separator);
173                         if (separator != '\n')
174                                 puts(" ");
175                 }
176                 if (m->has_init)
177                         mmc_type = IS_SD(m) ? "SD" : "eMMC";
178                 else
179                         mmc_type = NULL;
180
181                 printf("%s: %d", m->cfg->name, mmc_get_blk_desc(m)->devnum);
182                 if (mmc_type)
183                         printf(" (%s)", mmc_type);
184         }
185
186         printf("\n");
187 }
188
189 #else
190 void print_mmc_devices(char separator) { }
191 #endif
192
193 int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
194 {
195         struct blk_desc *bdesc;
196         struct udevice *bdev;
197         int ret, devnum = -1;
198
199 #ifdef CONFIG_DM_MMC_OPS
200         if (!mmc_get_ops(dev))
201                 return -ENOSYS;
202 #endif
203 #ifndef CONFIG_SPL_BUILD
204         /* Use the fixed index with aliase node's index */
205         fdtdec_get_alias_seq(gd->fdt_blob, "mmc", dev_of_offset(dev), &devnum);
206 #endif
207
208         ret = blk_create_devicef(dev, "mmc_blk", "blk", IF_TYPE_MMC,
209                         devnum, 512, 0, &bdev);
210         if (ret) {
211                 debug("Cannot create block device\n");
212                 return ret;
213         }
214         bdesc = dev_get_uclass_platdata(bdev);
215         mmc->cfg = cfg;
216         mmc->priv = dev;
217
218         /* the following chunk was from mmc_register() */
219
220         /* Setup dsr related values */
221         mmc->dsr_imp = 0;
222         mmc->dsr = 0xffffffff;
223         /* Setup the universal parts of the block interface just once */
224         bdesc->removable = 1;
225
226         /* setup initial part type */
227         bdesc->part_type = cfg->part_type;
228         mmc->dev = dev;
229
230         return 0;
231 }
232
233 int mmc_unbind(struct udevice *dev)
234 {
235         struct udevice *bdev;
236
237         device_find_first_child(dev, &bdev);
238         if (bdev) {
239                 device_remove(bdev, DM_REMOVE_NORMAL);
240                 device_unbind(bdev);
241         }
242
243         return 0;
244 }
245
246 static int mmc_select_hwpart(struct udevice *bdev, int hwpart)
247 {
248         struct udevice *mmc_dev = dev_get_parent(bdev);
249         struct mmc *mmc = mmc_get_mmc_dev(mmc_dev);
250         struct blk_desc *desc = dev_get_uclass_platdata(bdev);
251
252         if (desc->hwpart == hwpart)
253                 return 0;
254
255         if (mmc->part_config == MMCPART_NOAVAILABLE)
256                 return -EMEDIUMTYPE;
257
258         return mmc_switch_part(mmc, hwpart);
259 }
260
261 static int mmc_blk_probe(struct udevice *dev)
262 {
263         struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
264         int dev_num = block_dev->devnum;
265         struct mmc *mmc = find_mmc_device(dev_num);
266
267         if (!mmc)
268                 return -ENODEV;
269         return mmc_init(mmc);
270 }
271
272 static const struct blk_ops mmc_blk_ops = {
273         .read   = mmc_bread,
274 #ifndef CONFIG_SPL_BUILD
275         .write  = mmc_bwrite,
276         .erase  = mmc_berase,
277 #endif
278         .select_hwpart  = mmc_select_hwpart,
279 };
280
281 U_BOOT_DRIVER(mmc_blk) = {
282         .name           = "mmc_blk",
283         .id             = UCLASS_BLK,
284         .ops            = &mmc_blk_ops,
285         .probe          = mmc_blk_probe,
286 };
287 #endif /* CONFIG_BLK */
288
289 U_BOOT_DRIVER(mmc) = {
290         .name   = "mmc",
291         .id     = UCLASS_MMC,
292 };
293
294 UCLASS_DRIVER(mmc) = {
295         .id             = UCLASS_MMC,
296         .name           = "mmc",
297         .flags          = DM_UC_FLAG_SEQ_ALIAS,
298         .per_device_auto_alloc_size = sizeof(struct mmc_uclass_priv),
299 };