2013-02-26 05:34:45 -07:00
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/*
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* Universal Flash Storage Host controller Platform bus based glue driver
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*
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* This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
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* Copyright (C) 2011-2013 Samsung India Software Operations
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*
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* Authors:
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* Santosh Yaraganavi <santosh.sy@samsung.com>
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* Vinayak Holikatti <h.vinayak@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* See the COPYING file in the top-level directory or visit
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* This program is provided "AS IS" and "WITH ALL FAULTS" and
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* without warranty of any kind. You are solely responsible for
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* determining the appropriateness of using and distributing
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* the program and assume all risks associated with your exercise
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* of rights with respect to the program, including but not limited
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* to infringement of third party rights, the risks and costs of
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* program errors, damage to or loss of data, programs or equipment,
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* and unavailability or interruption of operations. Under no
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* circumstances will the contributor of this Program be liable for
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* any damages of any kind arising from your use or distribution of
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* this program.
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*/
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#include <linux/platform_device.h>
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2013-07-29 13:06:00 -06:00
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#include <linux/pm_runtime.h>
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2014-09-25 06:32:21 -06:00
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#include <linux/of.h>
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2013-02-26 05:34:45 -07:00
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2013-06-26 22:31:54 -06:00
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#include "ufshcd.h"
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2015-10-28 05:15:49 -06:00
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#include "ufshcd-pltfrm.h"
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2014-09-25 06:32:21 -06:00
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2016-03-10 08:37:05 -07:00
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#define UFSHCD_DEFAULT_LANES_PER_DIRECTION 2
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2014-09-25 06:32:23 -06:00
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static int ufshcd_parse_clock_info(struct ufs_hba *hba)
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{
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int ret = 0;
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int cnt;
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int i;
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struct device *dev = hba->dev;
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struct device_node *np = dev->of_node;
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char *name;
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u32 *clkfreq = NULL;
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struct ufs_clk_info *clki;
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2014-09-25 06:32:33 -06:00
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int len = 0;
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size_t sz = 0;
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2014-09-25 06:32:23 -06:00
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if (!np)
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goto out;
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cnt = of_property_count_strings(np, "clock-names");
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if (!cnt || (cnt == -EINVAL)) {
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dev_info(dev, "%s: Unable to find clocks, assuming enabled\n",
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__func__);
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} else if (cnt < 0) {
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dev_err(dev, "%s: count clock strings failed, err %d\n",
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__func__, cnt);
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ret = cnt;
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}
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if (cnt <= 0)
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goto out;
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2014-09-25 06:32:33 -06:00
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if (!of_get_property(np, "freq-table-hz", &len)) {
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dev_info(dev, "freq-table-hz property not specified\n");
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goto out;
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}
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if (len <= 0)
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goto out;
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sz = len / sizeof(*clkfreq);
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if (sz != 2 * cnt) {
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dev_err(dev, "%s len mismatch\n", "freq-table-hz");
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ret = -EINVAL;
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goto out;
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}
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clkfreq = devm_kzalloc(dev, sz * sizeof(*clkfreq),
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GFP_KERNEL);
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2014-09-25 06:32:23 -06:00
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if (!clkfreq) {
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ret = -ENOMEM;
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goto out;
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}
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2014-09-25 06:32:33 -06:00
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ret = of_property_read_u32_array(np, "freq-table-hz",
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clkfreq, sz);
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2014-09-25 06:32:23 -06:00
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if (ret && (ret != -EINVAL)) {
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2014-09-25 06:32:33 -06:00
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dev_err(dev, "%s: error reading array %d\n",
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"freq-table-hz", ret);
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2014-10-23 04:25:17 -06:00
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return ret;
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2014-09-25 06:32:23 -06:00
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}
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2014-09-25 06:32:33 -06:00
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for (i = 0; i < sz; i += 2) {
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2014-09-25 06:32:23 -06:00
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ret = of_property_read_string_index(np,
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2014-09-25 06:32:33 -06:00
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"clock-names", i/2, (const char **)&name);
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2014-09-25 06:32:23 -06:00
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if (ret)
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2014-10-23 04:25:17 -06:00
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goto out;
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2014-09-25 06:32:23 -06:00
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clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL);
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if (!clki) {
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ret = -ENOMEM;
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2014-10-23 04:25:17 -06:00
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goto out;
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2014-09-25 06:32:23 -06:00
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}
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2014-09-25 06:32:33 -06:00
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clki->min_freq = clkfreq[i];
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clki->max_freq = clkfreq[i+1];
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2014-09-25 06:32:23 -06:00
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clki->name = kstrdup(name, GFP_KERNEL);
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2014-09-25 06:32:33 -06:00
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dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz",
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clki->min_freq, clki->max_freq, clki->name);
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2014-09-25 06:32:23 -06:00
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list_add_tail(&clki->list, &hba->clk_list_head);
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}
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2014-09-25 06:32:33 -06:00
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out:
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2014-09-25 06:32:23 -06:00
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return ret;
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}
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2014-09-25 06:32:22 -06:00
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#define MAX_PROP_SIZE 32
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static int ufshcd_populate_vreg(struct device *dev, const char *name,
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struct ufs_vreg **out_vreg)
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{
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int ret = 0;
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char prop_name[MAX_PROP_SIZE];
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struct ufs_vreg *vreg = NULL;
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struct device_node *np = dev->of_node;
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if (!np) {
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dev_err(dev, "%s: non DT initialization\n", __func__);
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goto out;
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}
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snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", name);
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if (!of_parse_phandle(np, prop_name, 0)) {
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dev_info(dev, "%s: Unable to find %s regulator, assuming enabled\n",
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__func__, prop_name);
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goto out;
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}
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vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL);
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2014-10-23 04:25:15 -06:00
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if (!vreg)
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return -ENOMEM;
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2014-09-25 06:32:22 -06:00
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vreg->name = kstrdup(name, GFP_KERNEL);
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2014-09-25 06:32:24 -06:00
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/* if fixed regulator no need further initialization */
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snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name);
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if (of_property_read_bool(np, prop_name))
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goto out;
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2014-09-25 06:32:22 -06:00
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snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name);
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ret = of_property_read_u32(np, prop_name, &vreg->max_uA);
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if (ret) {
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dev_err(dev, "%s: unable to find %s err %d\n",
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__func__, prop_name, ret);
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2016-10-27 18:25:58 -06:00
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goto out;
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2014-09-25 06:32:22 -06:00
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}
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vreg->min_uA = 0;
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if (!strcmp(name, "vcc")) {
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if (of_property_read_bool(np, "vcc-supply-1p8")) {
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vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV;
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vreg->max_uV = UFS_VREG_VCC_1P8_MAX_UV;
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} else {
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vreg->min_uV = UFS_VREG_VCC_MIN_UV;
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vreg->max_uV = UFS_VREG_VCC_MAX_UV;
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}
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} else if (!strcmp(name, "vccq")) {
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vreg->min_uV = UFS_VREG_VCCQ_MIN_UV;
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vreg->max_uV = UFS_VREG_VCCQ_MAX_UV;
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} else if (!strcmp(name, "vccq2")) {
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vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV;
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vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV;
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}
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goto out;
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out:
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if (!ret)
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*out_vreg = vreg;
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return ret;
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}
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/**
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* ufshcd_parse_regulator_info - get regulator info from device tree
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* @hba: per adapter instance
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*
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* Get regulator info from device tree for vcc, vccq, vccq2 power supplies.
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* If any of the supplies are not defined it is assumed that they are always-on
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* and hence return zero. If the property is defined but parsing is failed
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* then return corresponding error.
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*/
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static int ufshcd_parse_regulator_info(struct ufs_hba *hba)
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{
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int err;
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struct device *dev = hba->dev;
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struct ufs_vreg_info *info = &hba->vreg_info;
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2014-09-25 06:32:24 -06:00
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err = ufshcd_populate_vreg(dev, "vdd-hba", &info->vdd_hba);
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if (err)
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goto out;
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2014-09-25 06:32:22 -06:00
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err = ufshcd_populate_vreg(dev, "vcc", &info->vcc);
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if (err)
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goto out;
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err = ufshcd_populate_vreg(dev, "vccq", &info->vccq);
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if (err)
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goto out;
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err = ufshcd_populate_vreg(dev, "vccq2", &info->vccq2);
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out:
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return err;
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}
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2013-02-26 05:34:45 -07:00
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#ifdef CONFIG_PM
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/**
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* ufshcd_pltfrm_suspend - suspend power management function
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* @dev: pointer to device handle
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*
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2014-09-25 06:32:30 -06:00
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* Returns 0 if successful
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* Returns non-zero otherwise
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2013-02-26 05:34:45 -07:00
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*/
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2015-10-28 05:15:49 -06:00
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int ufshcd_pltfrm_suspend(struct device *dev)
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2013-02-26 05:34:45 -07:00
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{
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2014-09-25 06:32:30 -06:00
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return ufshcd_system_suspend(dev_get_drvdata(dev));
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2013-02-26 05:34:45 -07:00
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}
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2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend);
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2013-02-26 05:34:45 -07:00
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/**
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* ufshcd_pltfrm_resume - resume power management function
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* @dev: pointer to device handle
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*
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2014-09-25 06:32:30 -06:00
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* Returns 0 if successful
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* Returns non-zero otherwise
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2013-02-26 05:34:45 -07:00
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*/
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2015-10-28 05:15:49 -06:00
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int ufshcd_pltfrm_resume(struct device *dev)
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2013-02-26 05:34:45 -07:00
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{
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2014-09-25 06:32:30 -06:00
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return ufshcd_system_resume(dev_get_drvdata(dev));
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2013-02-26 05:34:45 -07:00
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}
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2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
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2013-02-26 05:34:45 -07:00
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2015-10-28 05:15:49 -06:00
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int ufshcd_pltfrm_runtime_suspend(struct device *dev)
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2013-07-29 13:06:00 -06:00
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{
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2014-09-25 06:32:30 -06:00
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return ufshcd_runtime_suspend(dev_get_drvdata(dev));
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2013-07-29 13:06:00 -06:00
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}
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2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
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int ufshcd_pltfrm_runtime_resume(struct device *dev)
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2013-07-29 13:06:00 -06:00
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{
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2014-09-25 06:32:30 -06:00
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return ufshcd_runtime_resume(dev_get_drvdata(dev));
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2013-07-29 13:06:00 -06:00
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}
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2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
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int ufshcd_pltfrm_runtime_idle(struct device *dev)
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2013-07-29 13:06:00 -06:00
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{
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2014-09-25 06:32:30 -06:00
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return ufshcd_runtime_idle(dev_get_drvdata(dev));
|
2013-07-29 13:06:00 -06:00
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}
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2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle);
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2014-12-14 15:13:55 -07:00
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#endif /* CONFIG_PM */
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2013-07-29 13:06:00 -06:00
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2015-10-28 05:15:49 -06:00
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void ufshcd_pltfrm_shutdown(struct platform_device *pdev)
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2014-09-25 06:32:30 -06:00
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{
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ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev));
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}
|
2015-10-28 05:15:49 -06:00
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EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
|
2014-09-25 06:32:30 -06:00
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|
2016-03-10 08:37:05 -07:00
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static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba)
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{
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struct device *dev = hba->dev;
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int ret;
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ret = of_property_read_u32(dev->of_node, "lanes-per-direction",
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&hba->lanes_per_direction);
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if (ret) {
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dev_dbg(hba->dev,
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"%s: failed to read lanes-per-direction, ret=%d\n",
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__func__, ret);
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hba->lanes_per_direction = UFSHCD_DEFAULT_LANES_PER_DIRECTION;
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}
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}
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|
2013-02-26 05:34:45 -07:00
|
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/**
|
2015-10-28 05:15:49 -06:00
|
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* ufshcd_pltfrm_init - probe routine of the driver
|
2013-02-26 05:34:45 -07:00
|
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|
* @pdev: pointer to Platform device handle
|
2015-10-28 05:15:49 -06:00
|
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* @vops: pointer to variant ops
|
2013-02-26 05:34:45 -07:00
|
|
|
*
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|
* Returns 0 on success, non-zero value on failure
|
|
|
|
*/
|
2015-10-28 05:15:49 -06:00
|
|
|
int ufshcd_pltfrm_init(struct platform_device *pdev,
|
|
|
|
struct ufs_hba_variant_ops *vops)
|
2013-02-26 05:34:45 -07:00
|
|
|
{
|
|
|
|
struct ufs_hba *hba;
|
|
|
|
void __iomem *mmio_base;
|
|
|
|
struct resource *mem_res;
|
2013-06-26 22:31:54 -06:00
|
|
|
int irq, err;
|
2013-02-26 05:34:45 -07:00
|
|
|
struct device *dev = &pdev->dev;
|
|
|
|
|
|
|
|
mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
2013-06-26 22:31:54 -06:00
|
|
|
mmio_base = devm_ioremap_resource(dev, mem_res);
|
2017-03-14 06:19:36 -06:00
|
|
|
if (IS_ERR(mmio_base)) {
|
|
|
|
err = PTR_ERR(mmio_base);
|
2013-06-26 22:31:54 -06:00
|
|
|
goto out;
|
2013-02-26 05:34:45 -07:00
|
|
|
}
|
|
|
|
|
2013-06-26 22:31:54 -06:00
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
|
|
if (irq < 0) {
|
|
|
|
dev_err(dev, "IRQ resource not available\n");
|
2013-02-26 05:34:45 -07:00
|
|
|
err = -ENODEV;
|
2013-06-26 22:31:54 -06:00
|
|
|
goto out;
|
2013-02-26 05:34:45 -07:00
|
|
|
}
|
|
|
|
|
2014-09-25 06:32:21 -06:00
|
|
|
err = ufshcd_alloc_host(dev, &hba);
|
|
|
|
if (err) {
|
|
|
|
dev_err(&pdev->dev, "Allocation failed\n");
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2015-10-28 05:15:49 -06:00
|
|
|
hba->vops = vops;
|
2014-09-25 06:32:21 -06:00
|
|
|
|
2014-09-25 06:32:23 -06:00
|
|
|
err = ufshcd_parse_clock_info(hba);
|
|
|
|
if (err) {
|
|
|
|
dev_err(&pdev->dev, "%s: clock parse failed %d\n",
|
|
|
|
__func__, err);
|
2015-10-28 05:15:49 -06:00
|
|
|
goto dealloc_host;
|
2014-09-25 06:32:23 -06:00
|
|
|
}
|
2014-09-25 06:32:22 -06:00
|
|
|
err = ufshcd_parse_regulator_info(hba);
|
|
|
|
if (err) {
|
|
|
|
dev_err(&pdev->dev, "%s: regulator init failed %d\n",
|
|
|
|
__func__, err);
|
2015-10-28 05:15:49 -06:00
|
|
|
goto dealloc_host;
|
2014-09-25 06:32:22 -06:00
|
|
|
}
|
|
|
|
|
2013-07-29 13:06:00 -06:00
|
|
|
pm_runtime_set_active(&pdev->dev);
|
|
|
|
pm_runtime_enable(&pdev->dev);
|
|
|
|
|
2016-03-10 08:37:05 -07:00
|
|
|
ufshcd_init_lanes_per_dir(hba);
|
|
|
|
|
2014-09-25 06:32:21 -06:00
|
|
|
err = ufshcd_init(hba, mmio_base, irq);
|
2013-02-26 05:34:45 -07:00
|
|
|
if (err) {
|
2015-11-28 09:33:56 -07:00
|
|
|
dev_err(dev, "Initialization failed\n");
|
2013-07-29 13:06:00 -06:00
|
|
|
goto out_disable_rpm;
|
2013-02-26 05:34:45 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, hba);
|
|
|
|
|
2013-07-29 13:06:00 -06:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_disable_rpm:
|
|
|
|
pm_runtime_disable(&pdev->dev);
|
|
|
|
pm_runtime_set_suspended(&pdev->dev);
|
2015-10-28 05:15:49 -06:00
|
|
|
dealloc_host:
|
|
|
|
ufshcd_dealloc_host(hba);
|
2013-06-26 22:31:54 -06:00
|
|
|
out:
|
2013-02-26 05:34:45 -07:00
|
|
|
return err;
|
|
|
|
}
|
2015-10-28 05:15:49 -06:00
|
|
|
EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init);
|
2013-02-26 05:34:45 -07:00
|
|
|
|
|
|
|
MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>");
|
|
|
|
MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>");
|
2016-05-11 05:21:25 -06:00
|
|
|
MODULE_DESCRIPTION("UFS host controller Platform bus based glue driver");
|
2013-02-26 05:34:45 -07:00
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION(UFSHCD_DRIVER_VERSION);
|