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

Directory: drivers/scsi/ufs
/*
 * UFS Host driver for Synopsys Designware Core
 *
 * Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
 *
 * Authors: Joao Pinto <jpinto@synopsys.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include "ufshcd.h"
#include "unipro.h"

#include "ufshcd-dwc.h"
#include "ufshci-dwc.h"


int ufshcd_dwc_dme_set_attrs(struct ufs_hba *hba, const struct ufshcd_dme_attr_val *v, int n) { int ret = 0; int attr_node = 0; for (attr_node = 0; attr_node < n; attr_node++) { ret = ufshcd_dme_set_attr(hba, v[attr_node].attr_sel, ATTR_SET_NOR, v[attr_node].mib_val, v[attr_node].peer); if (ret) return ret; } return 0; }

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Joao Pinto84100.00%1100.00%
Total84100.00%1100.00%

EXPORT_SYMBOL(ufshcd_dwc_dme_set_attrs); /** * ufshcd_dwc_program_clk_div() * This function programs the clk divider value. This value is needed to * provide 1 microsecond tick to unipro layer. * @hba: Private Structure pointer * @divider_val: clock divider value to be programmed * */
static void ufshcd_dwc_program_clk_div(struct ufs_hba *hba, u32 divider_val) { ufshcd_writel(hba, divider_val, DWC_UFS_REG_HCLKDIV); }

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Joao Pinto23100.00%1100.00%
Total23100.00%1100.00%

/** * ufshcd_dwc_link_is_up() * Check if link is up * @hba: private structure poitner * * Returns 0 on success, non-zero value on failure */
static int ufshcd_dwc_link_is_up(struct ufs_hba *hba) { int dme_result = 0; ufshcd_dme_get(hba, UIC_ARG_MIB(VS_POWERSTATE), &dme_result); if (dme_result == UFSHCD_LINK_IS_UP) { ufshcd_set_link_active(hba); return 0; } return 1; }

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Joao Pinto48100.00%1100.00%
Total48100.00%1100.00%

/** * ufshcd_dwc_connection_setup() * This function configures both the local side (host) and the peer side * (device) unipro attributes to establish the connection to application/ * cport. * This function is not required if the hardware is properly configured to * have this connection setup on reset. But invoking this function does no * harm and should be fine even working with any ufs device. * * @hba: pointer to drivers private data * * Returns 0 on success non-zero value on failure */
static int ufshcd_dwc_connection_setup(struct ufs_hba *hba) { const struct ufshcd_dme_attr_val setup_attrs[] = { { UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_LOCAL }, { UIC_ARG_MIB(N_DEVICEID), 0, DME_LOCAL }, { UIC_ARG_MIB(N_DEVICEID_VALID), 0, DME_LOCAL }, { UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_LOCAL }, { UIC_ARG_MIB(T_PEERCPORTID), 0, DME_LOCAL }, { UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_LOCAL }, { UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_LOCAL }, { UIC_ARG_MIB(T_CPORTMODE), 1, DME_LOCAL }, { UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_LOCAL }, { UIC_ARG_MIB(T_CONNECTIONSTATE), 0, DME_PEER }, { UIC_ARG_MIB(N_DEVICEID), 1, DME_PEER }, { UIC_ARG_MIB(N_DEVICEID_VALID), 1, DME_PEER }, { UIC_ARG_MIB(T_PEERDEVICEID), 1, DME_PEER }, { UIC_ARG_MIB(T_PEERCPORTID), 0, DME_PEER }, { UIC_ARG_MIB(T_TRAFFICCLASS), 0, DME_PEER }, { UIC_ARG_MIB(T_CPORTFLAGS), 0x6, DME_PEER }, { UIC_ARG_MIB(T_CPORTMODE), 1, DME_PEER }, { UIC_ARG_MIB(T_CONNECTIONSTATE), 1, DME_PEER } }; return ufshcd_dwc_dme_set_attrs(hba, setup_attrs, ARRAY_SIZE(setup_attrs)); }

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Joao Pinto230100.00%1100.00%
Total230100.00%1100.00%

/** * ufshcd_dwc_link_startup_notify() * UFS Host DWC specific link startup sequence * @hba: private structure poitner * @status: Callback notify status * * Returns 0 on success, non-zero value on failure */
int ufshcd_dwc_link_startup_notify(struct ufs_hba *hba, enum ufs_notify_change_status status) { int err = 0; if (status == PRE_CHANGE) { ufshcd_dwc_program_clk_div(hba, DWC_UFS_REG_HCLKDIV_DIV_125); if (hba->vops->phy_initialization) { err = hba->vops->phy_initialization(hba); if (err) { dev_err(hba->dev, "Phy setup failed (%d)\n", err); goto out; } } } else { /* POST_CHANGE */ err = ufshcd_dwc_link_is_up(hba); if (err) { dev_err(hba->dev, "Link is not up\n"); goto out; } err = ufshcd_dwc_connection_setup(hba); if (err) dev_err(hba->dev, "Connection setup failed (%d)\n", err); } out: return err; }

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Joao Pinto131100.00%1100.00%
Total131100.00%1100.00%

EXPORT_SYMBOL(ufshcd_dwc_link_startup_notify); MODULE_AUTHOR("Joao Pinto <Joao.Pinto@synopsys.com>"); MODULE_DESCRIPTION("UFS Host driver for Synopsys Designware Core"); MODULE_LICENSE("Dual BSD/GPL");

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Joao Pinto558100.00%2100.00%
Total558100.00%2100.00%
Directory: drivers/scsi/ufs
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