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Release 4.11 drivers/scsi/ufs/ufshcd-pltfrm.c

Directory: drivers/scsi/ufs
/*
 * Universal Flash Storage Host controller Platform bus based glue driver
 *
 * This code is based on drivers/scsi/ufs/ufshcd-pltfrm.c
 * Copyright (C) 2011-2013 Samsung India Software Operations
 *
 * Authors:
 *      Santosh Yaraganavi <santosh.sy@samsung.com>
 *      Vinayak Holikatti <h.vinayak@samsung.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * See the COPYING file in the top-level directory or visit
 * <http://www.gnu.org/licenses/gpl-2.0.html>
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * This program is provided "AS IS" and "WITH ALL FAULTS" and
 * without warranty of any kind. You are solely responsible for
 * determining the appropriateness of using and distributing
 * the program and assume all risks associated with your exercise
 * of rights with respect to the program, including but not limited
 * to infringement of third party rights, the risks and costs of
 * program errors, damage to or loss of data, programs or equipment,
 * and unavailability or interruption of operations. Under no
 * circumstances will the contributor of this Program be liable for
 * any damages of any kind arising from your use or distribution of
 * this program.
 */

#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>

#include "ufshcd.h"
#include "ufshcd-pltfrm.h"


#define UFSHCD_DEFAULT_LANES_PER_DIRECTION		2


static int ufshcd_parse_clock_info(struct ufs_hba *hba) { int ret = 0; int cnt; int i; struct device *dev = hba->dev; struct device_node *np = dev->of_node; char *name; u32 *clkfreq = NULL; struct ufs_clk_info *clki; int len = 0; size_t sz = 0; if (!np) goto out; INIT_LIST_HEAD(&hba->clk_list_head); cnt = of_property_count_strings(np, "clock-names"); if (!cnt || (cnt == -EINVAL)) { dev_info(dev, "%s: Unable to find clocks, assuming enabled\n", __func__); } else if (cnt < 0) { dev_err(dev, "%s: count clock strings failed, err %d\n", __func__, cnt); ret = cnt; } if (cnt <= 0) goto out; if (!of_get_property(np, "freq-table-hz", &len)) { dev_info(dev, "freq-table-hz property not specified\n"); goto out; } if (len <= 0) goto out; sz = len / sizeof(*clkfreq); if (sz != 2 * cnt) { dev_err(dev, "%s len mismatch\n", "freq-table-hz"); ret = -EINVAL; goto out; } clkfreq = devm_kzalloc(dev, sz * sizeof(*clkfreq), GFP_KERNEL); if (!clkfreq) { ret = -ENOMEM; goto out; } ret = of_property_read_u32_array(np, "freq-table-hz", clkfreq, sz); if (ret && (ret != -EINVAL)) { dev_err(dev, "%s: error reading array %d\n", "freq-table-hz", ret); return ret; } for (i = 0; i < sz; i += 2) { ret = of_property_read_string_index(np, "clock-names", i/2, (const char **)&name); if (ret) goto out; clki = devm_kzalloc(dev, sizeof(*clki), GFP_KERNEL); if (!clki) { ret = -ENOMEM; goto out; } clki->min_freq = clkfreq[i]; clki->max_freq = clkfreq[i+1]; clki->name = kstrdup(name, GFP_KERNEL); dev_dbg(dev, "%s: min %u max %u name %s\n", "freq-table-hz", clki->min_freq, clki->max_freq, clki->name); list_add_tail(&clki->list, &hba->clk_list_head); } out: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma29668.20%133.33%
Sahitya Tummala13330.65%133.33%
Dolev Raviv51.15%133.33%
Total434100.00%3100.00%

#define MAX_PROP_SIZE 32
static int ufshcd_populate_vreg(struct device *dev, const char *name, struct ufs_vreg **out_vreg) { int ret = 0; char prop_name[MAX_PROP_SIZE]; struct ufs_vreg *vreg = NULL; struct device_node *np = dev->of_node; if (!np) { dev_err(dev, "%s: non DT initialization\n", __func__); goto out; } snprintf(prop_name, MAX_PROP_SIZE, "%s-supply", name); if (!of_parse_phandle(np, prop_name, 0)) { dev_info(dev, "%s: Unable to find %s regulator, assuming enabled\n", __func__, prop_name); goto out; } vreg = devm_kzalloc(dev, sizeof(*vreg), GFP_KERNEL); if (!vreg) return -ENOMEM; vreg->name = kstrdup(name, GFP_KERNEL); /* if fixed regulator no need further initialization */ snprintf(prop_name, MAX_PROP_SIZE, "%s-fixed-regulator", name); if (of_property_read_bool(np, prop_name)) goto out; snprintf(prop_name, MAX_PROP_SIZE, "%s-max-microamp", name); ret = of_property_read_u32(np, prop_name, &vreg->max_uA); if (ret) { dev_err(dev, "%s: unable to find %s err %d\n", __func__, prop_name, ret); goto out; } vreg->min_uA = 0; if (!strcmp(name, "vcc")) { if (of_property_read_bool(np, "vcc-supply-1p8")) { vreg->min_uV = UFS_VREG_VCC_1P8_MIN_UV; vreg->max_uV = UFS_VREG_VCC_1P8_MAX_UV; } else { vreg->min_uV = UFS_VREG_VCC_MIN_UV; vreg->max_uV = UFS_VREG_VCC_MAX_UV; } } else if (!strcmp(name, "vccq")) { vreg->min_uV = UFS_VREG_VCCQ_MIN_UV; vreg->max_uV = UFS_VREG_VCCQ_MAX_UV; } else if (!strcmp(name, "vccq2")) { vreg->min_uV = UFS_VREG_VCCQ2_MIN_UV; vreg->max_uV = UFS_VREG_VCCQ2_MAX_UV; } goto out; out: if (!ret) *out_vreg = vreg; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma30891.39%125.00%
Raviv Shvili247.12%125.00%
Dolev Raviv41.19%125.00%
Subhash Jadavani10.30%125.00%
Total337100.00%4100.00%

/** * ufshcd_parse_regulator_info - get regulator info from device tree * @hba: per adapter instance * * Get regulator info from device tree for vcc, vccq, vccq2 power supplies. * If any of the supplies are not defined it is assumed that they are always-on * and hence return zero. If the property is defined but parsing is failed * then return corresponding error. */
static int ufshcd_parse_regulator_info(struct ufs_hba *hba) { int err; struct device *dev = hba->dev; struct ufs_vreg_info *info = &hba->vreg_info; err = ufshcd_populate_vreg(dev, "vdd-hba", &info->vdd_hba); if (err) goto out; err = ufshcd_populate_vreg(dev, "vcc", &info->vcc); if (err) goto out; err = ufshcd_populate_vreg(dev, "vccq", &info->vccq); if (err) goto out; err = ufshcd_populate_vreg(dev, "vccq2", &info->vccq2); out: return err; }

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PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma9481.74%150.00%
Raviv Shvili2118.26%150.00%
Total115100.00%2100.00%

#ifdef CONFIG_PM /** * ufshcd_pltfrm_suspend - suspend power management function * @dev: pointer to device handle * * Returns 0 if successful * Returns non-zero otherwise */
int ufshcd_pltfrm_suspend(struct device *dev) { return ufshcd_system_suspend(dev_get_drvdata(dev)); }

Contributors

PersonTokensPropCommitsCommitProp
Vinayak Holikatti1578.95%150.00%
Subhash Jadavani421.05%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_suspend); /** * ufshcd_pltfrm_resume - resume power management function * @dev: pointer to device handle * * Returns 0 if successful * Returns non-zero otherwise */
int ufshcd_pltfrm_resume(struct device *dev) { return ufshcd_system_resume(dev_get_drvdata(dev)); }

Contributors

PersonTokensPropCommitsCommitProp
Vinayak Holikatti1578.95%150.00%
Subhash Jadavani421.05%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_resume);
int ufshcd_pltfrm_runtime_suspend(struct device *dev) { return ufshcd_runtime_suspend(dev_get_drvdata(dev)); }

Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma1684.21%150.00%
Subhash Jadavani315.79%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_suspend);
int ufshcd_pltfrm_runtime_resume(struct device *dev) { return ufshcd_runtime_resume(dev_get_drvdata(dev)); }

Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma1684.21%150.00%
Subhash Jadavani315.79%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_resume);
int ufshcd_pltfrm_runtime_idle(struct device *dev) { return ufshcd_runtime_idle(dev_get_drvdata(dev)); }

Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma1684.21%150.00%
Subhash Jadavani315.79%150.00%
Total19100.00%2100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_runtime_idle); #endif /* CONFIG_PM */
void ufshcd_pltfrm_shutdown(struct platform_device *pdev) { ufshcd_shutdown((struct ufs_hba *)platform_get_drvdata(pdev)); }

Contributors

PersonTokensPropCommitsCommitProp
Subhash Jadavani23100.00%1100.00%
Total23100.00%1100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_shutdown);
static void ufshcd_init_lanes_per_dir(struct ufs_hba *hba) { struct device *dev = hba->dev; int ret; ret = of_property_read_u32(dev->of_node, "lanes-per-direction", &hba->lanes_per_direction); if (ret) { dev_dbg(hba->dev, "%s: failed to read lanes-per-direction, ret=%d\n", __func__, ret); hba->lanes_per_direction = UFSHCD_DEFAULT_LANES_PER_DIRECTION; } }

Contributors

PersonTokensPropCommitsCommitProp
Yaniv Gardi64100.00%1100.00%
Total64100.00%1100.00%

/** * ufshcd_pltfrm_init - probe routine of the driver * @pdev: pointer to Platform device handle * @vops: pointer to variant ops * * Returns 0 on success, non-zero value on failure */
int ufshcd_pltfrm_init(struct platform_device *pdev, struct ufs_hba_variant_ops *vops) { struct ufs_hba *hba; void __iomem *mmio_base; struct resource *mem_res; int irq, err; struct device *dev = &pdev->dev; mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); mmio_base = devm_ioremap_resource(dev, mem_res); if (IS_ERR(mmio_base)) { err = PTR_ERR(mmio_base); goto out; } irq = platform_get_irq(pdev, 0); if (irq < 0) { dev_err(dev, "IRQ resource not available\n"); err = -ENODEV; goto out; } err = ufshcd_alloc_host(dev, &hba); if (err) { dev_err(&pdev->dev, "Allocation failed\n"); goto out; } hba->vops = vops; err = ufshcd_parse_clock_info(hba); if (err) { dev_err(&pdev->dev, "%s: clock parse failed %d\n", __func__, err); goto dealloc_host; } err = ufshcd_parse_regulator_info(hba); if (err) { dev_err(&pdev->dev, "%s: regulator init failed %d\n", __func__, err); goto dealloc_host; } pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); ufshcd_init_lanes_per_dir(hba); err = ufshcd_init(hba, mmio_base, irq); if (err) { dev_err(dev, "Initialization failed\n"); goto out_disable_rpm; } platform_set_drvdata(pdev, hba); return 0; out_disable_rpm: pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); dealloc_host: ufshcd_dealloc_host(hba); out: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Vinayak Holikatti13244.15%111.11%
Sujit Reddy Thumma13043.48%444.44%
Yaniv Gardi196.35%222.22%
Seungwon Jeon175.69%111.11%
Colin Ian King10.33%111.11%
Total299100.00%9100.00%

EXPORT_SYMBOL_GPL(ufshcd_pltfrm_init); MODULE_AUTHOR("Santosh Yaragnavi <santosh.sy@samsung.com>"); MODULE_AUTHOR("Vinayak Holikatti <h.vinayak@samsung.com>"); MODULE_DESCRIPTION("UFS host controller Platform bus based glue driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(UFSHCD_DRIVER_VERSION);

Overall Contributors

PersonTokensPropCommitsCommitProp
Sujit Reddy Thumma89060.92%423.53%
Vinayak Holikatti19713.48%15.88%
Sahitya Tummala1339.10%15.88%
Yaniv Gardi1228.35%211.76%
Raviv Shvili453.08%15.88%
Subhash Jadavani432.94%211.76%
Seungwon Jeon191.30%15.88%
Dolev Raviv90.62%211.76%
Colin Ian King10.07%15.88%
Rafael J. Wysocki10.07%15.88%
Joao Pinto10.07%15.88%
Total1461100.00%17100.00%
Directory: drivers/scsi/ufs
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