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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/**
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* cdns-platform.c - Platform driver for Cadence UFSHCI device
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*
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* Copyright (C) 2019 Texas Instruments Incorporated - https://www.ti.com
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*/
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#include <clk.h>
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#include <common.h>
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#include <dm.h>
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#include <ufs.h>
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#include <asm/io.h>
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#include <dm/device_compat.h>
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#include <linux/bitops.h>
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#include <linux/err.h>
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#include <linux/time.h>
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#include "ufs.h"
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#define CDNS_UFS_REG_HCLKDIV 0xFC
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#define CDNS_UFS_REG_PHY_XCFGD1 0x113C
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static int cdns_ufs_link_startup_notify(struct ufs_hba *hba,
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enum ufs_notify_change_status status)
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{
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hba->quirks |= UFSHCD_QUIRK_BROKEN_LCC;
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switch (status) {
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case PRE_CHANGE:
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return ufshcd_dme_set(hba,
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UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE),
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0);
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case POST_CHANGE:
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;
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}
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return 0;
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}
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static int cdns_ufs_set_hclkdiv(struct ufs_hba *hba)
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{
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struct clk clk;
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unsigned long core_clk_rate = 0;
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u32 core_clk_div = 0;
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int ret;
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ret = clk_get_by_name(hba->dev, "core_clk", &clk);
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if (ret) {
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dev_err(hba->dev, "failed to get core_clk clock\n");
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return ret;
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}
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core_clk_rate = clk_get_rate(&clk);
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if (IS_ERR_VALUE(core_clk_rate)) {
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dev_err(hba->dev, "%s: unable to find core_clk rate\n",
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__func__);
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return core_clk_rate;
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}
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core_clk_div = core_clk_rate / USEC_PER_SEC;
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ufshcd_writel(hba, core_clk_div, CDNS_UFS_REG_HCLKDIV);
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return 0;
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}
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static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba,
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enum ufs_notify_change_status status)
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{
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switch (status) {
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case PRE_CHANGE:
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return cdns_ufs_set_hclkdiv(hba);
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case POST_CHANGE:
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;
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}
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return 0;
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}
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static int cdns_ufs_init(struct ufs_hba *hba)
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{
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u32 data;
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/* Increase RX_Advanced_Min_ActivateTime_Capability */
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data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1);
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data |= BIT(24);
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ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1);
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return 0;
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}
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static struct ufs_hba_ops cdns_pltfm_hba_ops = {
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.init = cdns_ufs_init,
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.hce_enable_notify = cdns_ufs_hce_enable_notify,
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.link_startup_notify = cdns_ufs_link_startup_notify,
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};
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static int cdns_ufs_pltfm_probe(struct udevice *dev)
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{
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int err = ufshcd_probe(dev, &cdns_pltfm_hba_ops);
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if (err)
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dev_err(dev, "ufshcd_probe() failed %d\n", err);
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return err;
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}
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static int cdns_ufs_pltfm_bind(struct udevice *dev)
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{
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struct udevice *scsi_dev;
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return ufs_scsi_bind(dev, &scsi_dev);
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}
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static const struct udevice_id cdns_ufs_pltfm_ids[] = {
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{
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.compatible = "cdns,ufshc-m31-16nm",
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},
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{},
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};
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U_BOOT_DRIVER(cdns_ufs_pltfm) = {
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.name = "cdns-ufs-pltfm",
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.id = UCLASS_UFS,
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.of_match = cdns_ufs_pltfm_ids,
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.probe = cdns_ufs_pltfm_probe,
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.bind = cdns_ufs_pltfm_bind,
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};
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