projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 4b9ffb5a JP |
1 | /* |
| 2 | * UFS Host driver for Synopsys Designware Core | |
| 3 | * | |
| 4 | * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com) | |
| 5 | * | |
| 6 | * Authors: Joao Pinto <jpinto@synopsys.com> | |
| 7 | * | |
| 8 | * This program is free software; you can redistribute it and/or modify | |
| 9 | * it under the terms of the GNU General Public License version 2 as | |
| 10 | * published by the Free Software Foundation. | |
| 11 | */ | |
| 12 | ||
| 13 | #include "ufshcd.h" | |
| 14 | #include "unipro.h" | |
| 15 | ||
| 16 | #include "ufshcd-dwc.h" | |
| 17 | #include "ufshci-dwc.h" | |
| 18 | ||
| 19 | int ufshcd_dwc_dme_set_attrs(struct ufs_hba *hba, | |
| 20 | const struct ufshcd_dme_attr_val *v, int n) | |
| 21 | { | |
| 22 | int ret = 0; | |
| 23 | int attr_node = 0; | |
| 24 | ||
| 25 | for (attr_node = 0; attr_node < n; attr_node++) { | |
| 26 | ret = ufshcd_dme_set_attr(hba, v[attr_node].attr_sel, | |
| 27 | ATTR_SET_NOR, v[attr_node].mib_val, v[attr_node].peer); | |
| 28 | ||
| 29 | if (ret) | |
| 30 | return ret; | |
| 31 | } | |
| 32 | ||
| 33 | return 0; | |
| 34 | } | |
| 35 | EXPORT_SYMBOL(ufshcd_dwc_dme_set_attrs); | |
| 36 | ||
| 37 | /** | |
| 38 | * ufshcd_dwc_program_clk_div() | |
| 39 | * This function programs the clk divider value. This value is needed to | |
| 40 | * provide 1 microsecond tick to unipro layer. | |
| 41 | * @hba: Private Structure pointer | |
| 42 | * @divider_val: clock divider value to be programmed | |
| 43 | * | |
| 44 | */ | |
| 45 | static void ufshcd_dwc_program_clk_div(struct ufs_hba *hba, u32 divider_val) | |
| 46 | { | |
| 47 | ufshcd_writel(hba, divider_val, DWC_UFS_REG_HCLKDIV); | |
| 48 | } | |
| 49 | ||
| 50 | /** | |
| 51 | * ufshcd_dwc_link_is_up() | |
| 52 | * Check if link is up | |
| 53 | * @hba: private structure poitner | |
| 54 | * | |
| 55 | * Returns 0 on success, non-zero value on failure | |
| 56 | */ | |
| 57 | static int ufshcd_dwc_link_is_up(struct ufs_hba *hba) | |
| 58 | { | |
| 59 | int dme_result = 0; | |
| 60 | ||
| 61 | ufshcd_dme_get(hba, UIC_ARG_MIB(VS_POWERSTATE), &dme_result); | |
| 62 | ||
| 63 | if (dme_result == UFSHCD_LINK_IS_UP) { | |
| 64 | ufshcd_set_link_active(hba); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | return 1; | |
| 69 | } | |
| 70 | ||
| 71 | /** | |
| 72 | * ufshcd_dwc_connection_setup() | |
| 73 | * This function configures both the local side (host) and the peer side | |
| 74 | * (device) unipro attributes to establish the connection to application/ | |
| 75 | * cport. | |
| 76 | * This function is not required if the hardware is properly configured to | |
| 77 | * have this connection setup on reset. But invoking this function does no | |
| 78 | * harm and should be fine even working with any ufs device. | |
| 79 | * | |
| 80 | * @hba: pointer to drivers private data | |
| 81 | * | |
| 82 | * Returns 0 on success non-zero value on failure | |
| 83 | */ | |
| 84 | static int ufshcd_dwc_connection_setup(struct ufs_hba *hba) | |
| 85 | { | |
| 86 | const struct ufshcd_dme_attr_val setup_attrs[] = { | |
| 87 | { UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_LOCAL }, | |
| 88 | { UIC_ARG_MIB(N_DEVICEID), 0, DME_LOCAL }, | |
| 89 | { UIC_ARG_MIB(N_DEVICEID_VALID), 0, DME_LOCAL }, | |
| 90 | { UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_LOCAL }, | |
| 91 | { UIC_ARG_MIB(T_PEERCPORTID), 0, DME_LOCAL }, | |
| 92 | { UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_LOCAL }, | |
| 93 | { UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_LOCAL }, | |
| 94 | { UIC_ARG_MIB(T_CPORTMODE), 1, DME_LOCAL }, | |
| 95 | { UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_LOCAL }, | |
| 96 | { UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_PEER }, | |
| 97 | { UIC_ARG_MIB(N_DEVICEID), 1, DME_PEER }, | |
| 98 | { UIC_ARG_MIB(N_DEVICEID_VALID), 1, DME_PEER }, | |
| 99 | { UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_PEER }, | |
| 100 | { UIC_ARG_MIB(T_PEERCPORTID), 0, DME_PEER }, | |
| 101 | { UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_PEER }, | |
| 102 | { UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_PEER }, | |
| 103 | { UIC_ARG_MIB(T_CPORTMODE), 1, DME_PEER }, | |
| 104 | { UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_PEER } | |
| 105 | }; | |
| 106 | ||
| 107 | return ufshcd_dwc_dme_set_attrs(hba, setup_attrs, ARRAY_SIZE(setup_attrs)); | |
| 108 | } | |
| 109 | ||
| 110 | /** | |
| 111 | * ufshcd_dwc_link_startup_notify() | |
| 112 | * UFS Host DWC specific link startup sequence | |
| 113 | * @hba: private structure poitner | |
| 114 | * @status: Callback notify status | |
| 115 | * | |
| 116 | * Returns 0 on success, non-zero value on failure | |
| 117 | */ | |
| 118 | int ufshcd_dwc_link_startup_notify(struct ufs_hba *hba, | |
| 119 | enum ufs_notify_change_status status) | |
| 120 | { | |
| 121 | int err = 0; | |
| 122 | ||
| 123 | if (status == PRE_CHANGE) { | |
| 124 | ufshcd_dwc_program_clk_div(hba, DWC_UFS_REG_HCLKDIV_DIV_125); | |
| 125 | ||
| 126 | if (hba->vops->phy_initialization) { | |
| 127 | err = hba->vops->phy_initialization(hba); | |
| 128 | if (err) { | |
| 129 | dev_err(hba->dev, "Phy setup failed (%d)\n", | |
| 130 | err); | |
| 131 | goto out; | |
| 132 | } | |
| 133 | } | |
| 134 | } else { /* POST_CHANGE */ | |
| 135 | err = ufshcd_dwc_link_is_up(hba); | |
| 136 | if (err) { | |
| 137 | dev_err(hba->dev, "Link is not up\n"); | |
| 138 | goto out; | |
| 139 | } | |
| 140 | ||
| 141 | err = ufshcd_dwc_connection_setup(hba); | |
| 142 | if (err) | |
| 143 | dev_err(hba->dev, "Connection setup failed (%d)\n", | |
| 144 | err); | |
| 145 | } | |
| 146 | ||
| 147 | out: | |
| 148 | return err; | |
| 149 | } | |
| 150 | EXPORT_SYMBOL(ufshcd_dwc_link_startup_notify); | |
| 87ee3ab9 JP |
151 | |
| 152 | MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>"); | |
| 153 | MODULE_DESCRIPTION("UFS Host driver for Synopsys Designware Core"); | |
| 154 | MODULE_LICENSE("Dual BSD/GPL"); |