projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| ef5fb5a8 FA |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /** | |
| 3 | * cdns-platform.c - Platform driver for Cadence UFSHCI device | |
| 4 | * | |
| 5 | * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com | |
| 6 | */ | |
| 7 | ||
| 8 | #include <clk.h> | |
| 9 | #include <common.h> | |
| 10 | #include <dm.h> | |
| 11 | #include <ufs.h> | |
| 336d4615 | 12 | #include <dm/device_compat.h> |
| 61b29b82 | 13 | #include <linux/err.h> |
| ef5fb5a8 FA |
14 | |
| 15 | #include "ufs.h" | |
| 16 | ||
| 17 | #define USEC_PER_SEC 1000000L | |
| 18 | ||
| 19 | #define CDNS_UFS_REG_HCLKDIV 0xFC | |
| 20 | #define CDNS_UFS_REG_PHY_XCFGD1 0x113C | |
| 21 | ||
| 22 | static int cdns_ufs_link_startup_notify(struct ufs_hba *hba, | |
| 23 | enum ufs_notify_change_status status) | |
| 24 | { | |
| 25 | hba->quirks |= UFSHCD_QUIRK_BROKEN_LCC; | |
| 26 | switch (status) { | |
| 27 | case PRE_CHANGE: | |
| 28 | return ufshcd_dme_set(hba, | |
| 29 | UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), | |
| 30 | 0); | |
| 31 | case POST_CHANGE: | |
| 32 | ; | |
| 33 | } | |
| 34 | ||
| 35 | return 0; | |
| 36 | } | |
| 37 | ||
| 38 | static int cdns_ufs_set_hclkdiv(struct ufs_hba *hba) | |
| 39 | { | |
| 40 | struct clk clk; | |
| 41 | unsigned long core_clk_rate = 0; | |
| 42 | u32 core_clk_div = 0; | |
| 43 | int ret; | |
| 44 | ||
| 45 | ret = clk_get_by_name(hba->dev, "core_clk", &clk); | |
| 46 | if (ret) { | |
| 47 | dev_err(hba->dev, "failed to get core_clk clock\n"); | |
| 48 | return ret; | |
| 49 | } | |
| 50 | ||
| 51 | core_clk_rate = clk_get_rate(&clk); | |
| 52 | if (IS_ERR_VALUE(core_clk_rate)) { | |
| 53 | dev_err(hba->dev, "%s: unable to find core_clk rate\n", | |
| 54 | __func__); | |
| 55 | return core_clk_rate; | |
| 56 | } | |
| 57 | ||
| 58 | core_clk_div = core_clk_rate / USEC_PER_SEC; | |
| 59 | ufshcd_writel(hba, core_clk_div, CDNS_UFS_REG_HCLKDIV); | |
| 60 | ||
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 64 | static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba, | |
| 65 | enum ufs_notify_change_status status) | |
| 66 | { | |
| 67 | switch (status) { | |
| 68 | case PRE_CHANGE: | |
| 69 | return cdns_ufs_set_hclkdiv(hba); | |
| 70 | case POST_CHANGE: | |
| 71 | ; | |
| 72 | } | |
| 73 | ||
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | static int cdns_ufs_init(struct ufs_hba *hba) | |
| 78 | { | |
| 79 | u32 data; | |
| 80 | ||
| 81 | /* Increase RX_Advanced_Min_ActivateTime_Capability */ | |
| 82 | data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1); | |
| 83 | data |= BIT(24); | |
| 84 | ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1); | |
| 85 | ||
| 86 | return 0; | |
| 87 | } | |
| 88 | ||
| 89 | static struct ufs_hba_ops cdns_pltfm_hba_ops = { | |
| 90 | .init = cdns_ufs_init, | |
| 91 | .hce_enable_notify = cdns_ufs_hce_enable_notify, | |
| 92 | .link_startup_notify = cdns_ufs_link_startup_notify, | |
| 93 | }; | |
| 94 | ||
| 95 | static int cdns_ufs_pltfm_probe(struct udevice *dev) | |
| 96 | { | |
| 97 | int err = ufshcd_probe(dev, &cdns_pltfm_hba_ops); | |
| 98 | if (err) | |
| 99 | dev_err(dev, "ufshcd_probe() failed %d\n", err); | |
| 100 | ||
| 101 | return err; | |
| 102 | } | |
| 103 | ||
| 104 | static int cdns_ufs_pltfm_bind(struct udevice *dev) | |
| 105 | { | |
| 106 | struct udevice *scsi_dev; | |
| 107 | ||
| 108 | return ufs_scsi_bind(dev, &scsi_dev); | |
| 109 | } | |
| 110 | ||
| 111 | static const struct udevice_id cdns_ufs_pltfm_ids[] = { | |
| 112 | { | |
| 113 | .compatible = "cdns,ufshc-m31-16nm", | |
| 114 | }, | |
| 115 | {}, | |
| 116 | }; | |
| 117 | ||
| 118 | U_BOOT_DRIVER(cdns_ufs_pltfm) = { | |
| 119 | .name = "cdns-ufs-pltfm", | |
| 120 | .id = UCLASS_UFS, | |
| 121 | .of_match = cdns_ufs_pltfm_ids, | |
| 122 | .probe = cdns_ufs_pltfm_probe, | |
| 123 | .bind = cdns_ufs_pltfm_bind, | |
| 124 | }; |