151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* UFS Host driver for Synopsys Designware Core
|
|
*
|
|
* Copyright (C) 2015-2016 Synopsys, Inc. (www.synopsys.com)
|
|
*
|
|
* Authors: Joao Pinto <jpinto@synopsys.com>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <ufs/ufshcd.h>
|
|
#include <ufs/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;
|
|
}
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dwc_link_is_up()
|
|
* Check if link is up
|
|
* @hba: private structure pointer
|
|
*
|
|
* 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;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
static 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));
|
|
}
|
|
|
|
/**
|
|
* ufshcd_dwc_link_startup_notify()
|
|
* UFS Host DWC specific link startup sequence
|
|
* @hba: private structure pointer
|
|
* @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);
|
|
|
|
err = ufshcd_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;
|
|
}
|
|
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");
|