mirror of https://gitee.com/openkylin/linux.git
177 lines
3.7 KiB
C
177 lines
3.7 KiB
C
/*
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* linux/arch/arm/mach-omap2/hsmmc.c
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*
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* Copyright (C) 2007-2008 Texas Instruments
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* Copyright (C) 2008 Nokia Corporation
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* Author: Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/mmc/host.h>
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#include <linux/platform_data/hsmmc-omap.h>
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#include "soc.h"
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#include "omap_device.h"
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#include "hsmmc.h"
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#include "control.h"
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#if IS_ENABLED(CONFIG_MMC_OMAP_HS)
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static u16 control_pbias_offset;
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static u16 control_devconf1_offset;
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#define HSMMC_NAME_LEN 9
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static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
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struct omap_hsmmc_platform_data *mmc)
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{
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char *hc_name;
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hc_name = kzalloc(HSMMC_NAME_LEN + 1, GFP_KERNEL);
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if (!hc_name) {
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kfree(hc_name);
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return -ENOMEM;
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}
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snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i", c->mmc, 1);
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mmc->name = hc_name;
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mmc->caps = c->caps;
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mmc->reg_offset = 0;
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return 0;
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}
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static int omap_hsmmc_done;
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void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
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{
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struct platform_device *pdev;
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int res;
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if (omap_hsmmc_done)
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return;
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omap_hsmmc_done = 1;
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for (; c->mmc; c++) {
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pdev = c->pdev;
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if (!pdev)
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continue;
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res = omap_device_register(pdev);
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if (res)
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pr_err("Could not late init MMC\n");
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}
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}
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#define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
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static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
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int ctrl_nr)
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{
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struct omap_hwmod *oh;
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struct omap_hwmod *ohs[1];
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struct omap_device *od;
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struct platform_device *pdev;
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char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
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struct omap_hsmmc_platform_data *mmc_data;
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struct omap_hsmmc_dev_attr *mmc_dev_attr;
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char *name;
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int res;
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mmc_data = kzalloc(sizeof(*mmc_data), GFP_KERNEL);
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if (!mmc_data)
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return;
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res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
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if (res < 0)
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goto free_mmc;
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name = "omap_hsmmc";
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res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
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"mmc%d", ctrl_nr);
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WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
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"String buffer overflow in MMC%d device setup\n", ctrl_nr);
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oh = omap_hwmod_lookup(oh_name);
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if (!oh) {
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pr_err("Could not look up %s\n", oh_name);
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goto free_name;
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}
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ohs[0] = oh;
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if (oh->dev_attr != NULL) {
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mmc_dev_attr = oh->dev_attr;
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mmc_data->controller_flags = mmc_dev_attr->flags;
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}
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pdev = platform_device_alloc(name, ctrl_nr - 1);
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if (!pdev) {
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pr_err("Could not allocate pdev for %s\n", name);
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goto free_name;
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}
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dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
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od = omap_device_alloc(pdev, ohs, 1);
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if (IS_ERR(od)) {
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pr_err("Could not allocate od for %s\n", name);
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goto put_pdev;
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}
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res = platform_device_add_data(pdev, mmc_data,
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sizeof(struct omap_hsmmc_platform_data));
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if (res) {
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pr_err("Could not add pdata for %s\n", name);
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goto put_pdev;
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}
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hsmmcinfo->pdev = pdev;
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res = omap_device_register(pdev);
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if (res) {
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pr_err("Could not register od for %s\n", name);
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goto free_od;
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}
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goto free_mmc;
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free_od:
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omap_device_delete(od);
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put_pdev:
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platform_device_put(pdev);
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free_name:
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kfree(mmc_data->name);
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free_mmc:
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kfree(mmc_data);
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}
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void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
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{
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if (omap_hsmmc_done)
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return;
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omap_hsmmc_done = 1;
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if (cpu_is_omap2430()) {
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control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
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control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
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} else {
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control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
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control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
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}
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for (; controllers->mmc; controllers++)
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omap_hsmmc_init_one(controllers, controllers->mmc);
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}
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#endif
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