1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/arch/arm/mach-omap2/hsmmc.c
4 *
5 * Copyright (C) 2007-2008 Texas Instruments
6 * Copyright (C) 2008 Nokia Corporation
7 * Author: Texas Instruments
8 */
9 #include <linux/kernel.h>
10 #include <linux/slab.h>
11 #include <linux/string.h>
12 #include <linux/delay.h>
13 #include <linux/mmc/host.h>
14 #include <linux/platform_data/hsmmc-omap.h>
15
16 #include "soc.h"
17 #include "omap_device.h"
18
19 #include "hsmmc.h"
20 #include "control.h"
21
22 #if IS_ENABLED(CONFIG_MMC_OMAP_HS)
23
24 static u16 control_pbias_offset;
25 static u16 control_devconf1_offset;
26
27 #define HSMMC_NAME_LEN 9
28
omap_hsmmc_pdata_init(struct omap2_hsmmc_info * c,struct omap_hsmmc_platform_data * mmc)29 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
30 struct omap_hsmmc_platform_data *mmc)
31 {
32 char *hc_name;
33
34 hc_name = kzalloc(HSMMC_NAME_LEN + 1, GFP_KERNEL);
35 if (!hc_name)
36 return -ENOMEM;
37
38 snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i", c->mmc, 1);
39 mmc->name = hc_name;
40 mmc->caps = c->caps;
41 mmc->reg_offset = 0;
42
43 return 0;
44 }
45
46 static int omap_hsmmc_done;
47
omap_hsmmc_late_init(struct omap2_hsmmc_info * c)48 void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
49 {
50 struct platform_device *pdev;
51 int res;
52
53 if (omap_hsmmc_done)
54 return;
55
56 omap_hsmmc_done = 1;
57
58 for (; c->mmc; c++) {
59 pdev = c->pdev;
60 if (!pdev)
61 continue;
62 res = omap_device_register(pdev);
63 if (res)
64 pr_err("Could not late init MMC\n");
65 }
66 }
67
68 #define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
69
omap_hsmmc_init_one(struct omap2_hsmmc_info * hsmmcinfo,int ctrl_nr)70 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
71 int ctrl_nr)
72 {
73 struct omap_hwmod *oh;
74 struct omap_hwmod *ohs[1];
75 struct omap_device *od;
76 struct platform_device *pdev;
77 char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
78 struct omap_hsmmc_platform_data *mmc_data;
79 struct omap_hsmmc_dev_attr *mmc_dev_attr;
80 char *name;
81 int res;
82
83 mmc_data = kzalloc(sizeof(*mmc_data), GFP_KERNEL);
84 if (!mmc_data)
85 return;
86
87 res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
88 if (res < 0)
89 goto free_mmc;
90
91 name = "omap_hsmmc";
92 res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
93 "mmc%d", ctrl_nr);
94 WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
95 "String buffer overflow in MMC%d device setup\n", ctrl_nr);
96
97 oh = omap_hwmod_lookup(oh_name);
98 if (!oh) {
99 pr_err("Could not look up %s\n", oh_name);
100 goto free_name;
101 }
102 ohs[0] = oh;
103 if (oh->dev_attr != NULL) {
104 mmc_dev_attr = oh->dev_attr;
105 mmc_data->controller_flags = mmc_dev_attr->flags;
106 }
107
108 pdev = platform_device_alloc(name, ctrl_nr - 1);
109 if (!pdev) {
110 pr_err("Could not allocate pdev for %s\n", name);
111 goto free_name;
112 }
113 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
114
115 od = omap_device_alloc(pdev, ohs, 1);
116 if (IS_ERR(od)) {
117 pr_err("Could not allocate od for %s\n", name);
118 goto put_pdev;
119 }
120
121 res = platform_device_add_data(pdev, mmc_data,
122 sizeof(struct omap_hsmmc_platform_data));
123 if (res) {
124 pr_err("Could not add pdata for %s\n", name);
125 goto put_pdev;
126 }
127
128 hsmmcinfo->pdev = pdev;
129
130 res = omap_device_register(pdev);
131 if (res) {
132 pr_err("Could not register od for %s\n", name);
133 goto free_od;
134 }
135
136 goto free_mmc;
137
138 free_od:
139 omap_device_delete(od);
140
141 put_pdev:
142 platform_device_put(pdev);
143
144 free_name:
145 kfree(mmc_data->name);
146
147 free_mmc:
148 kfree(mmc_data);
149 }
150
omap_hsmmc_init(struct omap2_hsmmc_info * controllers)151 void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
152 {
153 if (omap_hsmmc_done)
154 return;
155
156 omap_hsmmc_done = 1;
157
158 if (cpu_is_omap2430()) {
159 control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
160 control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
161 } else {
162 control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
163 control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
164 }
165
166 for (; controllers->mmc; controllers++)
167 omap_hsmmc_init_one(controllers, controllers->mmc);
168
169 }
170
171 #endif
172