1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap2/hsmmc.c
5 * Copyright (C) 2007-2008 Texas Instruments
6 * Copyright (C) 2008 Nokia Corporation
7 * Author: Texas Instruments
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>
17 #include "omap_device.h"
22 #if IS_ENABLED(CONFIG_MMC_OMAP_HS)
24 static u16 control_pbias_offset;
25 static u16 control_devconf1_offset;
27 #define HSMMC_NAME_LEN 9
29 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
30 struct omap_hsmmc_platform_data *mmc)
34 hc_name = kzalloc(HSMMC_NAME_LEN + 1, GFP_KERNEL);
40 snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i", c->mmc, 1);
48 static int omap_hsmmc_done;
50 void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
52 struct platform_device *pdev;
64 res = omap_device_register(pdev);
66 pr_err("Could not late init MMC\n");
70 #define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
72 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
75 struct omap_hwmod *oh;
76 struct omap_hwmod *ohs[1];
77 struct omap_device *od;
78 struct platform_device *pdev;
79 char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
80 struct omap_hsmmc_platform_data *mmc_data;
81 struct omap_hsmmc_dev_attr *mmc_dev_attr;
85 mmc_data = kzalloc(sizeof(*mmc_data), GFP_KERNEL);
89 res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
94 res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
96 WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
97 "String buffer overflow in MMC%d device setup\n", ctrl_nr);
99 oh = omap_hwmod_lookup(oh_name);
101 pr_err("Could not look up %s\n", oh_name);
105 if (oh->dev_attr != NULL) {
106 mmc_dev_attr = oh->dev_attr;
107 mmc_data->controller_flags = mmc_dev_attr->flags;
110 pdev = platform_device_alloc(name, ctrl_nr - 1);
112 pr_err("Could not allocate pdev for %s\n", name);
115 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
117 od = omap_device_alloc(pdev, ohs, 1);
119 pr_err("Could not allocate od for %s\n", name);
123 res = platform_device_add_data(pdev, mmc_data,
124 sizeof(struct omap_hsmmc_platform_data));
126 pr_err("Could not add pdata for %s\n", name);
130 hsmmcinfo->pdev = pdev;
132 res = omap_device_register(pdev);
134 pr_err("Could not register od for %s\n", name);
141 omap_device_delete(od);
144 platform_device_put(pdev);
147 kfree(mmc_data->name);
153 void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
160 if (cpu_is_omap2430()) {
161 control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
162 control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
164 control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
165 control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
168 for (; controllers->mmc; controllers++)
169 omap_hsmmc_init_one(controllers, controllers->mmc);