mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
Updates to the usual drivers (megaraid_sas, scsi_debug, lpfc, target, mpi3mr, hisi_sas, arcmsr). The major core change is the constification of the host templates (which touches everything) along with other minor fixups and clean ups. Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCZEmJACYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pishU4FAP0WYhFC rkbY203/+ErUuwvOKum0VwJKUowCaUD0MBwScAD+Ok/NWobmjdXUBbPUbvVkr+hE 8B/xs9hodX+1fVJcVG0= =fS/j -----END PGP SIGNATURE----- Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI updates from James Bottomley: "Updates to the usual drivers (megaraid_sas, scsi_debug, lpfc, target, mpi3mr, hisi_sas, arcmsr). The major core change is the constification of the host templates (which touches everything) along with other minor fixups and clean ups" * tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (207 commits) scsi: ufs: mcq: Use pointer arithmetic in ufshcd_send_command() scsi: ufs: mcq: Annotate ufshcd_inc_sq_tail() appropriately scsi: cxlflash: s/semahpore/semaphore/ scsi: lpfc: Silence an incorrect device output scsi: mpi3mr: Use IRQ save variants of spinlock to protect chain frame allocation scsi: scsi_debug: Fix missing error code in scsi_debug_init() scsi: hisi_sas: Work around build failure in suspend function scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup() scsi: mpt3sas: Fix an issue when driver is being removed scsi: mpt3sas: Remove HBA BIOS version in the kernel log scsi: target: core: Fix invalid memory access scsi: scsi_debug: Drop sdebug_queue scsi: scsi_debug: Only allow sdebug_max_queue be modified when no shosts scsi: scsi_debug: Use scsi_host_busy() in delay_store() and ndelay_store() scsi: scsi_debug: Use blk_mq_tagset_busy_iter() in stop_all_queued() scsi: scsi_debug: Use blk_mq_tagset_busy_iter() in sdebug_blk_mq_poll() scsi: scsi_debug: Dynamically allocate sdebug_queued_cmd scsi: scsi_debug: Use scsi_block_requests() to block queues scsi: scsi_debug: Protect block_unblock_all_queues() with mutex scsi: scsi_debug: Change shost list lock to a mutex ...
952 lines
23 KiB
C
952 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* AHCI SATA platform library
|
|
*
|
|
* Copyright 2004-2005 Red Hat, Inc.
|
|
* Jeff Garzik <jgarzik@pobox.com>
|
|
* Copyright 2010 MontaVista Software, LLC.
|
|
* Anton Vorontsov <avorontsov@ru.mvista.com>
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/gfp.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/device.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/libata.h>
|
|
#include <linux/ahci_platform.h>
|
|
#include <linux/phy/phy.h>
|
|
#include <linux/pm_runtime.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/reset.h>
|
|
#include "ahci.h"
|
|
|
|
static void ahci_host_stop(struct ata_host *host);
|
|
|
|
struct ata_port_operations ahci_platform_ops = {
|
|
.inherits = &ahci_ops,
|
|
.host_stop = ahci_host_stop,
|
|
};
|
|
EXPORT_SYMBOL_GPL(ahci_platform_ops);
|
|
|
|
/**
|
|
* ahci_platform_enable_phys - Enable PHYs
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function enables all the PHYs found in hpriv->phys, if any.
|
|
* If a PHY fails to be enabled, it disables all the PHYs already
|
|
* enabled in reverse order and returns an error.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_enable_phys(struct ahci_host_priv *hpriv)
|
|
{
|
|
int rc, i;
|
|
|
|
for (i = 0; i < hpriv->nports; i++) {
|
|
rc = phy_init(hpriv->phys[i]);
|
|
if (rc)
|
|
goto disable_phys;
|
|
|
|
rc = phy_set_mode(hpriv->phys[i], PHY_MODE_SATA);
|
|
if (rc) {
|
|
phy_exit(hpriv->phys[i]);
|
|
goto disable_phys;
|
|
}
|
|
|
|
rc = phy_power_on(hpriv->phys[i]);
|
|
if (rc) {
|
|
phy_exit(hpriv->phys[i]);
|
|
goto disable_phys;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
|
|
disable_phys:
|
|
while (--i >= 0) {
|
|
phy_power_off(hpriv->phys[i]);
|
|
phy_exit(hpriv->phys[i]);
|
|
}
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_enable_phys);
|
|
|
|
/**
|
|
* ahci_platform_disable_phys - Disable PHYs
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function disables all PHYs found in hpriv->phys.
|
|
*/
|
|
void ahci_platform_disable_phys(struct ahci_host_priv *hpriv)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < hpriv->nports; i++) {
|
|
phy_power_off(hpriv->phys[i]);
|
|
phy_exit(hpriv->phys[i]);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_disable_phys);
|
|
|
|
/**
|
|
* ahci_platform_find_clk - Find platform clock
|
|
* @hpriv: host private area to store config values
|
|
* @con_id: clock connection ID
|
|
*
|
|
* This function returns a pointer to the clock descriptor of the clock with
|
|
* the passed ID.
|
|
*
|
|
* RETURNS:
|
|
* Pointer to the clock descriptor on success otherwise NULL
|
|
*/
|
|
struct clk *ahci_platform_find_clk(struct ahci_host_priv *hpriv, const char *con_id)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < hpriv->n_clks; i++) {
|
|
if (hpriv->clks[i].id && !strcmp(hpriv->clks[i].id, con_id))
|
|
return hpriv->clks[i].clk;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_find_clk);
|
|
|
|
/**
|
|
* ahci_platform_enable_clks - Enable platform clocks
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function enables all the clks found for the AHCI device.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_enable_clks(struct ahci_host_priv *hpriv)
|
|
{
|
|
return clk_bulk_prepare_enable(hpriv->n_clks, hpriv->clks);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_enable_clks);
|
|
|
|
/**
|
|
* ahci_platform_disable_clks - Disable platform clocks
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function disables all the clocks enabled before
|
|
* (bulk-clocks-disable function is supposed to do that in reverse
|
|
* from the enabling procedure order).
|
|
*/
|
|
void ahci_platform_disable_clks(struct ahci_host_priv *hpriv)
|
|
{
|
|
clk_bulk_disable_unprepare(hpriv->n_clks, hpriv->clks);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_disable_clks);
|
|
|
|
/**
|
|
* ahci_platform_deassert_rsts - Deassert/trigger platform resets
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function deasserts or triggers all the reset lines found for
|
|
* the AHCI device.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_deassert_rsts(struct ahci_host_priv *hpriv)
|
|
{
|
|
if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER)
|
|
return reset_control_reset(hpriv->rsts);
|
|
|
|
return reset_control_deassert(hpriv->rsts);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_deassert_rsts);
|
|
|
|
/**
|
|
* ahci_platform_assert_rsts - Assert/rearm platform resets
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function asserts or rearms (for self-deasserting resets) all
|
|
* the reset controls found for the AHCI device.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_assert_rsts(struct ahci_host_priv *hpriv)
|
|
{
|
|
if (hpriv->f_rsts & AHCI_PLATFORM_RST_TRIGGER)
|
|
return reset_control_rearm(hpriv->rsts);
|
|
|
|
return reset_control_assert(hpriv->rsts);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_assert_rsts);
|
|
|
|
/**
|
|
* ahci_platform_enable_regulators - Enable regulators
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function enables all the regulators found in controller and
|
|
* hpriv->target_pwrs, if any. If a regulator fails to be enabled, it
|
|
* disables all the regulators already enabled in reverse order and
|
|
* returns an error.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_enable_regulators(struct ahci_host_priv *hpriv)
|
|
{
|
|
int rc, i;
|
|
|
|
rc = regulator_enable(hpriv->ahci_regulator);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = regulator_enable(hpriv->phy_regulator);
|
|
if (rc)
|
|
goto disable_ahci_pwrs;
|
|
|
|
for (i = 0; i < hpriv->nports; i++) {
|
|
if (!hpriv->target_pwrs[i])
|
|
continue;
|
|
|
|
rc = regulator_enable(hpriv->target_pwrs[i]);
|
|
if (rc)
|
|
goto disable_target_pwrs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
disable_target_pwrs:
|
|
while (--i >= 0)
|
|
if (hpriv->target_pwrs[i])
|
|
regulator_disable(hpriv->target_pwrs[i]);
|
|
|
|
regulator_disable(hpriv->phy_regulator);
|
|
disable_ahci_pwrs:
|
|
regulator_disable(hpriv->ahci_regulator);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_enable_regulators);
|
|
|
|
/**
|
|
* ahci_platform_disable_regulators - Disable regulators
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function disables all regulators found in hpriv->target_pwrs and
|
|
* AHCI controller.
|
|
*/
|
|
void ahci_platform_disable_regulators(struct ahci_host_priv *hpriv)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < hpriv->nports; i++) {
|
|
if (!hpriv->target_pwrs[i])
|
|
continue;
|
|
regulator_disable(hpriv->target_pwrs[i]);
|
|
}
|
|
|
|
regulator_disable(hpriv->ahci_regulator);
|
|
regulator_disable(hpriv->phy_regulator);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_disable_regulators);
|
|
/**
|
|
* ahci_platform_enable_resources - Enable platform resources
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function enables all ahci_platform managed resources in the
|
|
* following order:
|
|
* 1) Regulator
|
|
* 2) Clocks (through ahci_platform_enable_clks)
|
|
* 3) Resets
|
|
* 4) Phys
|
|
*
|
|
* If resource enabling fails at any point the previous enabled resources
|
|
* are disabled in reverse order.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_enable_resources(struct ahci_host_priv *hpriv)
|
|
{
|
|
int rc;
|
|
|
|
rc = ahci_platform_enable_regulators(hpriv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = ahci_platform_enable_clks(hpriv);
|
|
if (rc)
|
|
goto disable_regulator;
|
|
|
|
rc = ahci_platform_deassert_rsts(hpriv);
|
|
if (rc)
|
|
goto disable_clks;
|
|
|
|
rc = ahci_platform_enable_phys(hpriv);
|
|
if (rc)
|
|
goto disable_rsts;
|
|
|
|
return 0;
|
|
|
|
disable_rsts:
|
|
ahci_platform_assert_rsts(hpriv);
|
|
|
|
disable_clks:
|
|
ahci_platform_disable_clks(hpriv);
|
|
|
|
disable_regulator:
|
|
ahci_platform_disable_regulators(hpriv);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_enable_resources);
|
|
|
|
/**
|
|
* ahci_platform_disable_resources - Disable platform resources
|
|
* @hpriv: host private area to store config values
|
|
*
|
|
* This function disables all ahci_platform managed resources in the
|
|
* following order:
|
|
* 1) Phys
|
|
* 2) Resets
|
|
* 3) Clocks (through ahci_platform_disable_clks)
|
|
* 4) Regulator
|
|
*/
|
|
void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
|
|
{
|
|
ahci_platform_disable_phys(hpriv);
|
|
|
|
ahci_platform_assert_rsts(hpriv);
|
|
|
|
ahci_platform_disable_clks(hpriv);
|
|
|
|
ahci_platform_disable_regulators(hpriv);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_disable_resources);
|
|
|
|
static void ahci_platform_put_resources(struct device *dev, void *res)
|
|
{
|
|
struct ahci_host_priv *hpriv = res;
|
|
int c;
|
|
|
|
if (hpriv->got_runtime_pm) {
|
|
pm_runtime_put_sync(dev);
|
|
pm_runtime_disable(dev);
|
|
}
|
|
|
|
/*
|
|
* The regulators are tied to child node device and not to the
|
|
* SATA device itself. So we can't use devm for automatically
|
|
* releasing them. We have to do it manually here.
|
|
*/
|
|
for (c = 0; c < hpriv->nports; c++)
|
|
if (hpriv->target_pwrs && hpriv->target_pwrs[c])
|
|
regulator_put(hpriv->target_pwrs[c]);
|
|
|
|
kfree(hpriv->target_pwrs);
|
|
}
|
|
|
|
static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
|
|
struct device *dev, struct device_node *node)
|
|
{
|
|
int rc;
|
|
|
|
hpriv->phys[port] = devm_of_phy_get(dev, node, NULL);
|
|
|
|
if (!IS_ERR(hpriv->phys[port]))
|
|
return 0;
|
|
|
|
rc = PTR_ERR(hpriv->phys[port]);
|
|
switch (rc) {
|
|
case -ENOSYS:
|
|
/* No PHY support. Check if PHY is required. */
|
|
if (of_property_present(node, "phys")) {
|
|
dev_err(dev,
|
|
"couldn't get PHY in node %pOFn: ENOSYS\n",
|
|
node);
|
|
break;
|
|
}
|
|
fallthrough;
|
|
case -ENODEV:
|
|
/* continue normally */
|
|
hpriv->phys[port] = NULL;
|
|
rc = 0;
|
|
break;
|
|
case -EPROBE_DEFER:
|
|
/* Do not complain yet */
|
|
break;
|
|
|
|
default:
|
|
dev_err(dev,
|
|
"couldn't get PHY in node %pOFn: %d\n",
|
|
node, rc);
|
|
|
|
break;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ahci_platform_get_regulator(struct ahci_host_priv *hpriv, u32 port,
|
|
struct device *dev)
|
|
{
|
|
struct regulator *target_pwr;
|
|
int rc = 0;
|
|
|
|
target_pwr = regulator_get(dev, "target");
|
|
|
|
if (!IS_ERR(target_pwr))
|
|
hpriv->target_pwrs[port] = target_pwr;
|
|
else
|
|
rc = PTR_ERR(target_pwr);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ahci_platform_get_firmware(struct ahci_host_priv *hpriv,
|
|
struct device *dev)
|
|
{
|
|
struct device_node *child;
|
|
u32 port;
|
|
|
|
if (!of_property_read_u32(dev->of_node, "hba-cap", &hpriv->saved_cap))
|
|
hpriv->saved_cap &= (HOST_CAP_SSS | HOST_CAP_MPS);
|
|
|
|
of_property_read_u32(dev->of_node,
|
|
"ports-implemented", &hpriv->saved_port_map);
|
|
|
|
for_each_child_of_node(dev->of_node, child) {
|
|
if (!of_device_is_available(child))
|
|
continue;
|
|
|
|
if (of_property_read_u32(child, "reg", &port)) {
|
|
of_node_put(child);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!of_property_read_u32(child, "hba-port-cap", &hpriv->saved_port_cap[port]))
|
|
hpriv->saved_port_cap[port] &= PORT_CMD_CAP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ahci_platform_get_resources - Get platform resources
|
|
* @pdev: platform device to get resources for
|
|
* @flags: bitmap representing the resource to get
|
|
*
|
|
* This function allocates an ahci_host_priv struct, and gets the following
|
|
* resources, storing a reference to them inside the returned struct:
|
|
*
|
|
* 1) mmio registers (IORESOURCE_MEM 0, mandatory)
|
|
* 2) regulator for controlling the targets power (optional)
|
|
* regulator for controlling the AHCI controller (optional)
|
|
* 3) all clocks specified in the devicetree node, or a single
|
|
* clock for non-OF platforms (optional)
|
|
* 4) resets, if flags has AHCI_PLATFORM_GET_RESETS (optional)
|
|
* 5) phys (optional)
|
|
*
|
|
* RETURNS:
|
|
* The allocated ahci_host_priv on success, otherwise an ERR_PTR value
|
|
*/
|
|
struct ahci_host_priv *ahci_platform_get_resources(struct platform_device *pdev,
|
|
unsigned int flags)
|
|
{
|
|
int child_nodes, rc = -ENOMEM, enabled_ports = 0;
|
|
struct device *dev = &pdev->dev;
|
|
struct ahci_host_priv *hpriv;
|
|
struct device_node *child;
|
|
u32 mask_port_map = 0;
|
|
|
|
if (!devres_open_group(dev, NULL, GFP_KERNEL))
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
hpriv = devres_alloc(ahci_platform_put_resources, sizeof(*hpriv),
|
|
GFP_KERNEL);
|
|
if (!hpriv)
|
|
goto err_out;
|
|
|
|
devres_add(dev, hpriv);
|
|
|
|
/*
|
|
* If the DT provided an "ahci" named resource, use it. Otherwise,
|
|
* fallback to using the default first resource for the device node.
|
|
*/
|
|
if (platform_get_resource_byname(pdev, IORESOURCE_MEM, "ahci"))
|
|
hpriv->mmio = devm_platform_ioremap_resource_byname(pdev, "ahci");
|
|
else
|
|
hpriv->mmio = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(hpriv->mmio)) {
|
|
rc = PTR_ERR(hpriv->mmio);
|
|
goto err_out;
|
|
}
|
|
|
|
/*
|
|
* Bulk clocks getting procedure can fail to find any clock due to
|
|
* running on a non-OF platform or due to the clocks being defined in
|
|
* bypass of the DT firmware (like da850, spear13xx). In that case we
|
|
* fallback to getting a single clock source right from the dev clocks
|
|
* list.
|
|
*/
|
|
rc = devm_clk_bulk_get_all(dev, &hpriv->clks);
|
|
if (rc < 0)
|
|
goto err_out;
|
|
|
|
if (rc > 0) {
|
|
/* Got clocks in bulk */
|
|
hpriv->n_clks = rc;
|
|
} else {
|
|
/*
|
|
* No clock bulk found: fallback to manually getting
|
|
* the optional clock.
|
|
*/
|
|
hpriv->clks = devm_kzalloc(dev, sizeof(*hpriv->clks), GFP_KERNEL);
|
|
if (!hpriv->clks) {
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
hpriv->clks->clk = devm_clk_get_optional(dev, NULL);
|
|
if (IS_ERR(hpriv->clks->clk)) {
|
|
rc = PTR_ERR(hpriv->clks->clk);
|
|
goto err_out;
|
|
} else if (hpriv->clks->clk) {
|
|
hpriv->clks->id = "ahci";
|
|
hpriv->n_clks = 1;
|
|
}
|
|
}
|
|
|
|
hpriv->ahci_regulator = devm_regulator_get(dev, "ahci");
|
|
if (IS_ERR(hpriv->ahci_regulator)) {
|
|
rc = PTR_ERR(hpriv->ahci_regulator);
|
|
if (rc != 0)
|
|
goto err_out;
|
|
}
|
|
|
|
hpriv->phy_regulator = devm_regulator_get(dev, "phy");
|
|
if (IS_ERR(hpriv->phy_regulator)) {
|
|
rc = PTR_ERR(hpriv->phy_regulator);
|
|
goto err_out;
|
|
}
|
|
|
|
if (flags & AHCI_PLATFORM_GET_RESETS) {
|
|
hpriv->rsts = devm_reset_control_array_get_optional_shared(dev);
|
|
if (IS_ERR(hpriv->rsts)) {
|
|
rc = PTR_ERR(hpriv->rsts);
|
|
goto err_out;
|
|
}
|
|
|
|
hpriv->f_rsts = flags & AHCI_PLATFORM_RST_TRIGGER;
|
|
}
|
|
|
|
/*
|
|
* Too many sub-nodes most likely means having something wrong with
|
|
* the firmware.
|
|
*/
|
|
child_nodes = of_get_child_count(dev->of_node);
|
|
if (child_nodes > AHCI_MAX_PORTS) {
|
|
rc = -EINVAL;
|
|
goto err_out;
|
|
}
|
|
|
|
/*
|
|
* If no sub-node was found, we still need to set nports to
|
|
* one in order to be able to use the
|
|
* ahci_platform_[en|dis]able_[phys|regulators] functions.
|
|
*/
|
|
if (child_nodes)
|
|
hpriv->nports = child_nodes;
|
|
else
|
|
hpriv->nports = 1;
|
|
|
|
hpriv->phys = devm_kcalloc(dev, hpriv->nports, sizeof(*hpriv->phys), GFP_KERNEL);
|
|
if (!hpriv->phys) {
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
/*
|
|
* We cannot use devm_ here, since ahci_platform_put_resources() uses
|
|
* target_pwrs after devm_ have freed memory
|
|
*/
|
|
hpriv->target_pwrs = kcalloc(hpriv->nports, sizeof(*hpriv->target_pwrs), GFP_KERNEL);
|
|
if (!hpriv->target_pwrs) {
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
if (child_nodes) {
|
|
for_each_child_of_node(dev->of_node, child) {
|
|
u32 port;
|
|
struct platform_device *port_dev __maybe_unused;
|
|
|
|
if (!of_device_is_available(child))
|
|
continue;
|
|
|
|
if (of_property_read_u32(child, "reg", &port)) {
|
|
rc = -EINVAL;
|
|
of_node_put(child);
|
|
goto err_out;
|
|
}
|
|
|
|
if (port >= hpriv->nports) {
|
|
dev_warn(dev, "invalid port number %d\n", port);
|
|
continue;
|
|
}
|
|
mask_port_map |= BIT(port);
|
|
|
|
#ifdef CONFIG_OF_ADDRESS
|
|
of_platform_device_create(child, NULL, NULL);
|
|
|
|
port_dev = of_find_device_by_node(child);
|
|
|
|
if (port_dev) {
|
|
rc = ahci_platform_get_regulator(hpriv, port,
|
|
&port_dev->dev);
|
|
if (rc == -EPROBE_DEFER) {
|
|
of_node_put(child);
|
|
goto err_out;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
rc = ahci_platform_get_phy(hpriv, port, dev, child);
|
|
if (rc) {
|
|
of_node_put(child);
|
|
goto err_out;
|
|
}
|
|
|
|
enabled_ports++;
|
|
}
|
|
if (!enabled_ports) {
|
|
dev_warn(dev, "No port enabled\n");
|
|
rc = -ENODEV;
|
|
goto err_out;
|
|
}
|
|
|
|
if (!hpriv->mask_port_map)
|
|
hpriv->mask_port_map = mask_port_map;
|
|
} else {
|
|
/*
|
|
* If no sub-node was found, keep this for device tree
|
|
* compatibility
|
|
*/
|
|
rc = ahci_platform_get_phy(hpriv, 0, dev, dev->of_node);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
rc = ahci_platform_get_regulator(hpriv, 0, dev);
|
|
if (rc == -EPROBE_DEFER)
|
|
goto err_out;
|
|
}
|
|
|
|
/*
|
|
* Retrieve firmware-specific flags which then will be used to set
|
|
* the HW-init fields of HBA and its ports
|
|
*/
|
|
rc = ahci_platform_get_firmware(hpriv, dev);
|
|
if (rc)
|
|
goto err_out;
|
|
|
|
pm_runtime_enable(dev);
|
|
pm_runtime_get_sync(dev);
|
|
hpriv->got_runtime_pm = true;
|
|
|
|
devres_remove_group(dev, NULL);
|
|
return hpriv;
|
|
|
|
err_out:
|
|
devres_release_group(dev, NULL);
|
|
return ERR_PTR(rc);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_get_resources);
|
|
|
|
/**
|
|
* ahci_platform_init_host - Bring up an ahci-platform host
|
|
* @pdev: platform device pointer for the host
|
|
* @hpriv: ahci-host private data for the host
|
|
* @pi_template: template for the ata_port_info to use
|
|
* @sht: scsi_host_template to use when registering
|
|
*
|
|
* This function does all the usual steps needed to bring up an
|
|
* ahci-platform host, note any necessary resources (ie clks, phys, etc.)
|
|
* must be initialized / enabled before calling this.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_init_host(struct platform_device *pdev,
|
|
struct ahci_host_priv *hpriv,
|
|
const struct ata_port_info *pi_template,
|
|
const struct scsi_host_template *sht)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct ata_port_info pi = *pi_template;
|
|
const struct ata_port_info *ppi[] = { &pi, NULL };
|
|
struct ata_host *host;
|
|
int i, irq, n_ports, rc;
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
if (!irq)
|
|
return -EINVAL;
|
|
|
|
hpriv->irq = irq;
|
|
|
|
/* prepare host */
|
|
pi.private_data = (void *)(unsigned long)hpriv->flags;
|
|
|
|
ahci_save_initial_config(dev, hpriv);
|
|
|
|
if (hpriv->cap & HOST_CAP_NCQ)
|
|
pi.flags |= ATA_FLAG_NCQ;
|
|
|
|
if (hpriv->cap & HOST_CAP_PMP)
|
|
pi.flags |= ATA_FLAG_PMP;
|
|
|
|
ahci_set_em_messages(hpriv, &pi);
|
|
|
|
/* CAP.NP sometimes indicate the index of the last enabled
|
|
* port, at other times, that of the last possible port, so
|
|
* determining the maximum port number requires looking at
|
|
* both CAP.NP and port_map.
|
|
*/
|
|
n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
|
|
|
|
host = ata_host_alloc_pinfo(dev, ppi, n_ports);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
host->private_data = hpriv;
|
|
|
|
if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
|
|
host->flags |= ATA_HOST_PARALLEL_SCAN;
|
|
else
|
|
dev_info(dev, "SSS flag set, parallel bus scan disabled\n");
|
|
|
|
if (pi.flags & ATA_FLAG_EM)
|
|
ahci_reset_em(host);
|
|
|
|
for (i = 0; i < host->n_ports; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
|
|
ata_port_desc(ap, "mmio %pR",
|
|
platform_get_resource(pdev, IORESOURCE_MEM, 0));
|
|
ata_port_desc(ap, "port 0x%x", 0x100 + ap->port_no * 0x80);
|
|
|
|
/* set enclosure management message type */
|
|
if (ap->flags & ATA_FLAG_EM)
|
|
ap->em_message_type = hpriv->em_msg_type;
|
|
|
|
/* disabled/not-implemented port */
|
|
if (!(hpriv->port_map & (1 << i)))
|
|
ap->ops = &ata_dummy_port_ops;
|
|
}
|
|
|
|
if (hpriv->cap & HOST_CAP_64) {
|
|
rc = dma_coerce_mask_and_coherent(dev, DMA_BIT_MASK(64));
|
|
if (rc) {
|
|
dev_err(dev, "Failed to enable 64-bit DMA.\n");
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
rc = ahci_reset_controller(host);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ahci_init_controller(host);
|
|
ahci_print_info(host, "platform");
|
|
|
|
return ahci_host_activate(host, sht);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_init_host);
|
|
|
|
static void ahci_host_stop(struct ata_host *host)
|
|
{
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
|
|
ahci_platform_disable_resources(hpriv);
|
|
}
|
|
|
|
/**
|
|
* ahci_platform_shutdown - Disable interrupts and stop DMA for host ports
|
|
* @pdev: platform device pointer for the host
|
|
*
|
|
* This function is called during system shutdown and performs the minimal
|
|
* deconfiguration required to ensure that an ahci_platform host cannot
|
|
* corrupt or otherwise interfere with a new kernel being started with kexec.
|
|
*/
|
|
void ahci_platform_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct ata_host *host = platform_get_drvdata(pdev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
void __iomem *mmio = hpriv->mmio;
|
|
int i;
|
|
|
|
for (i = 0; i < host->n_ports; i++) {
|
|
struct ata_port *ap = host->ports[i];
|
|
|
|
/* Disable port interrupts */
|
|
if (ap->ops->freeze)
|
|
ap->ops->freeze(ap);
|
|
|
|
/* Stop the port DMA engines */
|
|
if (ap->ops->port_stop)
|
|
ap->ops->port_stop(ap);
|
|
}
|
|
|
|
/* Disable and clear host interrupts */
|
|
writel(readl(mmio + HOST_CTL) & ~HOST_IRQ_EN, mmio + HOST_CTL);
|
|
readl(mmio + HOST_CTL); /* flush */
|
|
writel(GENMASK(host->n_ports, 0), mmio + HOST_IRQ_STAT);
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_shutdown);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/**
|
|
* ahci_platform_suspend_host - Suspend an ahci-platform host
|
|
* @dev: device pointer for the host
|
|
*
|
|
* This function does all the usual steps needed to suspend an
|
|
* ahci-platform host, note any necessary resources (ie clks, phys, etc.)
|
|
* must be disabled after calling this.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_suspend_host(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
void __iomem *mmio = hpriv->mmio;
|
|
u32 ctl;
|
|
|
|
if (hpriv->flags & AHCI_HFLAG_NO_SUSPEND) {
|
|
dev_err(dev, "firmware update required for suspend/resume\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* AHCI spec rev1.1 section 8.3.3:
|
|
* Software must disable interrupts prior to requesting a
|
|
* transition of the HBA to D3 state.
|
|
*/
|
|
ctl = readl(mmio + HOST_CTL);
|
|
ctl &= ~HOST_IRQ_EN;
|
|
writel(ctl, mmio + HOST_CTL);
|
|
readl(mmio + HOST_CTL); /* flush */
|
|
|
|
if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS)
|
|
ahci_platform_disable_phys(hpriv);
|
|
|
|
ata_host_suspend(host, PMSG_SUSPEND);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_suspend_host);
|
|
|
|
/**
|
|
* ahci_platform_resume_host - Resume an ahci-platform host
|
|
* @dev: device pointer for the host
|
|
*
|
|
* This function does all the usual steps needed to resume an ahci-platform
|
|
* host, note any necessary resources (ie clks, phys, etc.) must be
|
|
* initialized / enabled before calling this.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_resume_host(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
int rc;
|
|
|
|
if (dev->power.power_state.event == PM_EVENT_SUSPEND) {
|
|
rc = ahci_reset_controller(host);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ahci_init_controller(host);
|
|
}
|
|
|
|
if (hpriv->flags & AHCI_HFLAG_SUSPEND_PHYS)
|
|
ahci_platform_enable_phys(hpriv);
|
|
|
|
ata_host_resume(host);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_resume_host);
|
|
|
|
/**
|
|
* ahci_platform_suspend - Suspend an ahci-platform device
|
|
* @dev: the platform device to suspend
|
|
*
|
|
* This function suspends the host associated with the device, followed by
|
|
* disabling all the resources of the device.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_suspend(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
int rc;
|
|
|
|
rc = ahci_platform_suspend_host(dev);
|
|
if (rc)
|
|
return rc;
|
|
|
|
ahci_platform_disable_resources(hpriv);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_suspend);
|
|
|
|
/**
|
|
* ahci_platform_resume - Resume an ahci-platform device
|
|
* @dev: the platform device to resume
|
|
*
|
|
* This function enables all the resources of the device followed by
|
|
* resuming the host associated with the device.
|
|
*
|
|
* RETURNS:
|
|
* 0 on success otherwise a negative error code
|
|
*/
|
|
int ahci_platform_resume(struct device *dev)
|
|
{
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
struct ahci_host_priv *hpriv = host->private_data;
|
|
int rc;
|
|
|
|
rc = ahci_platform_enable_resources(hpriv);
|
|
if (rc)
|
|
return rc;
|
|
|
|
rc = ahci_platform_resume_host(dev);
|
|
if (rc)
|
|
goto disable_resources;
|
|
|
|
/* We resumed so update PM runtime state */
|
|
pm_runtime_disable(dev);
|
|
pm_runtime_set_active(dev);
|
|
pm_runtime_enable(dev);
|
|
|
|
return 0;
|
|
|
|
disable_resources:
|
|
ahci_platform_disable_resources(hpriv);
|
|
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(ahci_platform_resume);
|
|
#endif
|
|
|
|
MODULE_DESCRIPTION("AHCI SATA platform library");
|
|
MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
|
|
MODULE_LICENSE("GPL");
|