Faiz Abbas | ef5fb5a | 2019-10-15 18:24:37 +0530 | [diff] [blame] | 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> |
Simon Glass | 98eb4ce | 2020-07-19 10:15:54 -0600 | [diff] [blame] | 12 | #include <asm/io.h> |
Simon Glass | 336d461 | 2020-02-03 07:36:16 -0700 | [diff] [blame] | 13 | #include <dm/device_compat.h> |
Simon Glass | cd93d62 | 2020-05-10 11:40:13 -0600 | [diff] [blame] | 14 | #include <linux/bitops.h> |
Simon Glass | 61b29b8 | 2020-02-03 07:36:15 -0700 | [diff] [blame] | 15 | #include <linux/err.h> |
Faiz Abbas | ef5fb5a | 2019-10-15 18:24:37 +0530 | [diff] [blame] | 16 | |
| 17 | #include "ufs.h" |
| 18 | |
| 19 | #define USEC_PER_SEC 1000000L |
| 20 | |
| 21 | #define CDNS_UFS_REG_HCLKDIV 0xFC |
| 22 | #define CDNS_UFS_REG_PHY_XCFGD1 0x113C |
| 23 | |
| 24 | static int cdns_ufs_link_startup_notify(struct ufs_hba *hba, |
| 25 | enum ufs_notify_change_status status) |
| 26 | { |
| 27 | hba->quirks |= UFSHCD_QUIRK_BROKEN_LCC; |
| 28 | switch (status) { |
| 29 | case PRE_CHANGE: |
| 30 | return ufshcd_dme_set(hba, |
| 31 | UIC_ARG_MIB(PA_LOCAL_TX_LCC_ENABLE), |
| 32 | 0); |
| 33 | case POST_CHANGE: |
| 34 | ; |
| 35 | } |
| 36 | |
| 37 | return 0; |
| 38 | } |
| 39 | |
| 40 | static int cdns_ufs_set_hclkdiv(struct ufs_hba *hba) |
| 41 | { |
| 42 | struct clk clk; |
| 43 | unsigned long core_clk_rate = 0; |
| 44 | u32 core_clk_div = 0; |
| 45 | int ret; |
| 46 | |
| 47 | ret = clk_get_by_name(hba->dev, "core_clk", &clk); |
| 48 | if (ret) { |
| 49 | dev_err(hba->dev, "failed to get core_clk clock\n"); |
| 50 | return ret; |
| 51 | } |
| 52 | |
| 53 | core_clk_rate = clk_get_rate(&clk); |
| 54 | if (IS_ERR_VALUE(core_clk_rate)) { |
| 55 | dev_err(hba->dev, "%s: unable to find core_clk rate\n", |
| 56 | __func__); |
| 57 | return core_clk_rate; |
| 58 | } |
| 59 | |
| 60 | core_clk_div = core_clk_rate / USEC_PER_SEC; |
| 61 | ufshcd_writel(hba, core_clk_div, CDNS_UFS_REG_HCLKDIV); |
| 62 | |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | static int cdns_ufs_hce_enable_notify(struct ufs_hba *hba, |
| 67 | enum ufs_notify_change_status status) |
| 68 | { |
| 69 | switch (status) { |
| 70 | case PRE_CHANGE: |
| 71 | return cdns_ufs_set_hclkdiv(hba); |
| 72 | case POST_CHANGE: |
| 73 | ; |
| 74 | } |
| 75 | |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static int cdns_ufs_init(struct ufs_hba *hba) |
| 80 | { |
| 81 | u32 data; |
| 82 | |
| 83 | /* Increase RX_Advanced_Min_ActivateTime_Capability */ |
| 84 | data = ufshcd_readl(hba, CDNS_UFS_REG_PHY_XCFGD1); |
| 85 | data |= BIT(24); |
| 86 | ufshcd_writel(hba, data, CDNS_UFS_REG_PHY_XCFGD1); |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | static struct ufs_hba_ops cdns_pltfm_hba_ops = { |
| 92 | .init = cdns_ufs_init, |
| 93 | .hce_enable_notify = cdns_ufs_hce_enable_notify, |
| 94 | .link_startup_notify = cdns_ufs_link_startup_notify, |
| 95 | }; |
| 96 | |
| 97 | static int cdns_ufs_pltfm_probe(struct udevice *dev) |
| 98 | { |
| 99 | int err = ufshcd_probe(dev, &cdns_pltfm_hba_ops); |
| 100 | if (err) |
| 101 | dev_err(dev, "ufshcd_probe() failed %d\n", err); |
| 102 | |
| 103 | return err; |
| 104 | } |
| 105 | |
| 106 | static int cdns_ufs_pltfm_bind(struct udevice *dev) |
| 107 | { |
| 108 | struct udevice *scsi_dev; |
| 109 | |
| 110 | return ufs_scsi_bind(dev, &scsi_dev); |
| 111 | } |
| 112 | |
| 113 | static const struct udevice_id cdns_ufs_pltfm_ids[] = { |
| 114 | { |
| 115 | .compatible = "cdns,ufshc-m31-16nm", |
| 116 | }, |
| 117 | {}, |
| 118 | }; |
| 119 | |
| 120 | U_BOOT_DRIVER(cdns_ufs_pltfm) = { |
| 121 | .name = "cdns-ufs-pltfm", |
Marek Vasut | e4e01f8 | 2023-08-06 20:18:42 +0200 | [diff] [blame] | 122 | .id = UCLASS_UFS, |
Faiz Abbas | ef5fb5a | 2019-10-15 18:24:37 +0530 | [diff] [blame] | 123 | .of_match = cdns_ufs_pltfm_ids, |
| 124 | .probe = cdns_ufs_pltfm_probe, |
| 125 | .bind = cdns_ufs_pltfm_bind, |
| 126 | }; |