forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1263 lines
29 KiB
1263 lines
29 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Greybus interface code |
|
* |
|
* Copyright 2014 Google Inc. |
|
* Copyright 2014 Linaro Ltd. |
|
*/ |
|
|
|
#include <linux/delay.h> |
|
#include <linux/greybus.h> |
|
|
|
#include "greybus_trace.h" |
|
|
|
#define GB_INTERFACE_MODE_SWITCH_TIMEOUT 2000 |
|
|
|
#define GB_INTERFACE_DEVICE_ID_BAD 0xff |
|
|
|
#define GB_INTERFACE_AUTOSUSPEND_MS 3000 |
|
|
|
/* Time required for interface to enter standby before disabling REFCLK */ |
|
#define GB_INTERFACE_SUSPEND_HIBERNATE_DELAY_MS 20 |
|
|
|
/* Don't-care selector index */ |
|
#define DME_SELECTOR_INDEX_NULL 0 |
|
|
|
/* DME attributes */ |
|
/* FIXME: remove ES2 support and DME_T_TST_SRC_INCREMENT */ |
|
#define DME_T_TST_SRC_INCREMENT 0x4083 |
|
|
|
#define DME_DDBL1_MANUFACTURERID 0x5003 |
|
#define DME_DDBL1_PRODUCTID 0x5004 |
|
|
|
#define DME_TOSHIBA_GMP_VID 0x6000 |
|
#define DME_TOSHIBA_GMP_PID 0x6001 |
|
#define DME_TOSHIBA_GMP_SN0 0x6002 |
|
#define DME_TOSHIBA_GMP_SN1 0x6003 |
|
#define DME_TOSHIBA_GMP_INIT_STATUS 0x6101 |
|
|
|
/* DDBL1 Manufacturer and Product ids */ |
|
#define TOSHIBA_DMID 0x0126 |
|
#define TOSHIBA_ES2_BRIDGE_DPID 0x1000 |
|
#define TOSHIBA_ES3_APBRIDGE_DPID 0x1001 |
|
#define TOSHIBA_ES3_GBPHY_DPID 0x1002 |
|
|
|
static int gb_interface_hibernate_link(struct gb_interface *intf); |
|
static int gb_interface_refclk_set(struct gb_interface *intf, bool enable); |
|
|
|
static int gb_interface_dme_attr_get(struct gb_interface *intf, |
|
u16 attr, u32 *val) |
|
{ |
|
return gb_svc_dme_peer_get(intf->hd->svc, intf->interface_id, |
|
attr, DME_SELECTOR_INDEX_NULL, val); |
|
} |
|
|
|
static int gb_interface_read_ara_dme(struct gb_interface *intf) |
|
{ |
|
u32 sn0, sn1; |
|
int ret; |
|
|
|
/* |
|
* Unless this is a Toshiba bridge, bail out until we have defined |
|
* standard GMP attributes. |
|
*/ |
|
if (intf->ddbl1_manufacturer_id != TOSHIBA_DMID) { |
|
dev_err(&intf->dev, "unknown manufacturer %08x\n", |
|
intf->ddbl1_manufacturer_id); |
|
return -ENODEV; |
|
} |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_VID, |
|
&intf->vendor_id); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_PID, |
|
&intf->product_id); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_SN0, &sn0); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_TOSHIBA_GMP_SN1, &sn1); |
|
if (ret) |
|
return ret; |
|
|
|
intf->serial_number = (u64)sn1 << 32 | sn0; |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_read_dme(struct gb_interface *intf) |
|
{ |
|
int ret; |
|
|
|
/* DME attributes have already been read */ |
|
if (intf->dme_read) |
|
return 0; |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_DDBL1_MANUFACTURERID, |
|
&intf->ddbl1_manufacturer_id); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_interface_dme_attr_get(intf, DME_DDBL1_PRODUCTID, |
|
&intf->ddbl1_product_id); |
|
if (ret) |
|
return ret; |
|
|
|
if (intf->ddbl1_manufacturer_id == TOSHIBA_DMID && |
|
intf->ddbl1_product_id == TOSHIBA_ES2_BRIDGE_DPID) { |
|
intf->quirks |= GB_INTERFACE_QUIRK_NO_GMP_IDS; |
|
intf->quirks |= GB_INTERFACE_QUIRK_NO_INIT_STATUS; |
|
} |
|
|
|
ret = gb_interface_read_ara_dme(intf); |
|
if (ret) |
|
return ret; |
|
|
|
intf->dme_read = true; |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_route_create(struct gb_interface *intf) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
u8 intf_id = intf->interface_id; |
|
u8 device_id; |
|
int ret; |
|
|
|
/* Allocate an interface device id. */ |
|
ret = ida_simple_get(&svc->device_id_map, |
|
GB_SVC_DEVICE_ID_MIN, GB_SVC_DEVICE_ID_MAX + 1, |
|
GFP_KERNEL); |
|
if (ret < 0) { |
|
dev_err(&intf->dev, "failed to allocate device id: %d\n", ret); |
|
return ret; |
|
} |
|
device_id = ret; |
|
|
|
ret = gb_svc_intf_device_id(svc, intf_id, device_id); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to set device id %u: %d\n", |
|
device_id, ret); |
|
goto err_ida_remove; |
|
} |
|
|
|
/* FIXME: Hard-coded AP device id. */ |
|
ret = gb_svc_route_create(svc, svc->ap_intf_id, GB_SVC_DEVICE_ID_AP, |
|
intf_id, device_id); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to create route: %d\n", ret); |
|
goto err_svc_id_free; |
|
} |
|
|
|
intf->device_id = device_id; |
|
|
|
return 0; |
|
|
|
err_svc_id_free: |
|
/* |
|
* XXX Should we tell SVC that this id doesn't belong to interface |
|
* XXX anymore. |
|
*/ |
|
err_ida_remove: |
|
ida_simple_remove(&svc->device_id_map, device_id); |
|
|
|
return ret; |
|
} |
|
|
|
static void gb_interface_route_destroy(struct gb_interface *intf) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
|
|
if (intf->device_id == GB_INTERFACE_DEVICE_ID_BAD) |
|
return; |
|
|
|
gb_svc_route_destroy(svc, svc->ap_intf_id, intf->interface_id); |
|
ida_simple_remove(&svc->device_id_map, intf->device_id); |
|
intf->device_id = GB_INTERFACE_DEVICE_ID_BAD; |
|
} |
|
|
|
/* Locking: Caller holds the interface mutex. */ |
|
static int gb_interface_legacy_mode_switch(struct gb_interface *intf) |
|
{ |
|
int ret; |
|
|
|
dev_info(&intf->dev, "legacy mode switch detected\n"); |
|
|
|
/* Mark as disconnected to prevent I/O during disable. */ |
|
intf->disconnected = true; |
|
gb_interface_disable(intf); |
|
intf->disconnected = false; |
|
|
|
ret = gb_interface_enable(intf); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to re-enable interface: %d\n", ret); |
|
gb_interface_deactivate(intf); |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void gb_interface_mailbox_event(struct gb_interface *intf, u16 result, |
|
u32 mailbox) |
|
{ |
|
mutex_lock(&intf->mutex); |
|
|
|
if (result) { |
|
dev_warn(&intf->dev, |
|
"mailbox event with UniPro error: 0x%04x\n", |
|
result); |
|
goto err_disable; |
|
} |
|
|
|
if (mailbox != GB_SVC_INTF_MAILBOX_GREYBUS) { |
|
dev_warn(&intf->dev, |
|
"mailbox event with unexpected value: 0x%08x\n", |
|
mailbox); |
|
goto err_disable; |
|
} |
|
|
|
if (intf->quirks & GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH) { |
|
gb_interface_legacy_mode_switch(intf); |
|
goto out_unlock; |
|
} |
|
|
|
if (!intf->mode_switch) { |
|
dev_warn(&intf->dev, "unexpected mailbox event: 0x%08x\n", |
|
mailbox); |
|
goto err_disable; |
|
} |
|
|
|
dev_info(&intf->dev, "mode switch detected\n"); |
|
|
|
complete(&intf->mode_switch_completion); |
|
|
|
out_unlock: |
|
mutex_unlock(&intf->mutex); |
|
|
|
return; |
|
|
|
err_disable: |
|
gb_interface_disable(intf); |
|
gb_interface_deactivate(intf); |
|
mutex_unlock(&intf->mutex); |
|
} |
|
|
|
static void gb_interface_mode_switch_work(struct work_struct *work) |
|
{ |
|
struct gb_interface *intf; |
|
struct gb_control *control; |
|
unsigned long timeout; |
|
int ret; |
|
|
|
intf = container_of(work, struct gb_interface, mode_switch_work); |
|
|
|
mutex_lock(&intf->mutex); |
|
/* Make sure interface is still enabled. */ |
|
if (!intf->enabled) { |
|
dev_dbg(&intf->dev, "mode switch aborted\n"); |
|
intf->mode_switch = false; |
|
mutex_unlock(&intf->mutex); |
|
goto out_interface_put; |
|
} |
|
|
|
/* |
|
* Prepare the control device for mode switch and make sure to get an |
|
* extra reference before it goes away during interface disable. |
|
*/ |
|
control = gb_control_get(intf->control); |
|
gb_control_mode_switch_prepare(control); |
|
gb_interface_disable(intf); |
|
mutex_unlock(&intf->mutex); |
|
|
|
timeout = msecs_to_jiffies(GB_INTERFACE_MODE_SWITCH_TIMEOUT); |
|
ret = wait_for_completion_interruptible_timeout( |
|
&intf->mode_switch_completion, timeout); |
|
|
|
/* Finalise control-connection mode switch. */ |
|
gb_control_mode_switch_complete(control); |
|
gb_control_put(control); |
|
|
|
if (ret < 0) { |
|
dev_err(&intf->dev, "mode switch interrupted\n"); |
|
goto err_deactivate; |
|
} else if (ret == 0) { |
|
dev_err(&intf->dev, "mode switch timed out\n"); |
|
goto err_deactivate; |
|
} |
|
|
|
/* Re-enable (re-enumerate) interface if still active. */ |
|
mutex_lock(&intf->mutex); |
|
intf->mode_switch = false; |
|
if (intf->active) { |
|
ret = gb_interface_enable(intf); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to re-enable interface: %d\n", |
|
ret); |
|
gb_interface_deactivate(intf); |
|
} |
|
} |
|
mutex_unlock(&intf->mutex); |
|
|
|
out_interface_put: |
|
gb_interface_put(intf); |
|
|
|
return; |
|
|
|
err_deactivate: |
|
mutex_lock(&intf->mutex); |
|
intf->mode_switch = false; |
|
gb_interface_deactivate(intf); |
|
mutex_unlock(&intf->mutex); |
|
|
|
gb_interface_put(intf); |
|
} |
|
|
|
int gb_interface_request_mode_switch(struct gb_interface *intf) |
|
{ |
|
int ret = 0; |
|
|
|
mutex_lock(&intf->mutex); |
|
if (intf->mode_switch) { |
|
ret = -EBUSY; |
|
goto out_unlock; |
|
} |
|
|
|
intf->mode_switch = true; |
|
reinit_completion(&intf->mode_switch_completion); |
|
|
|
/* |
|
* Get a reference to the interface device, which will be put once the |
|
* mode switch is complete. |
|
*/ |
|
get_device(&intf->dev); |
|
|
|
if (!queue_work(system_long_wq, &intf->mode_switch_work)) { |
|
put_device(&intf->dev); |
|
ret = -EBUSY; |
|
goto out_unlock; |
|
} |
|
|
|
out_unlock: |
|
mutex_unlock(&intf->mutex); |
|
|
|
return ret; |
|
} |
|
EXPORT_SYMBOL_GPL(gb_interface_request_mode_switch); |
|
|
|
/* |
|
* T_TstSrcIncrement is written by the module on ES2 as a stand-in for the |
|
* init-status attribute DME_TOSHIBA_INIT_STATUS. The AP needs to read and |
|
* clear it after reading a non-zero value from it. |
|
* |
|
* FIXME: This is module-hardware dependent and needs to be extended for every |
|
* type of module we want to support. |
|
*/ |
|
static int gb_interface_read_and_clear_init_status(struct gb_interface *intf) |
|
{ |
|
struct gb_host_device *hd = intf->hd; |
|
unsigned long bootrom_quirks; |
|
unsigned long s2l_quirks; |
|
int ret; |
|
u32 value; |
|
u16 attr; |
|
u8 init_status; |
|
|
|
/* |
|
* ES2 bridges use T_TstSrcIncrement for the init status. |
|
* |
|
* FIXME: Remove ES2 support |
|
*/ |
|
if (intf->quirks & GB_INTERFACE_QUIRK_NO_INIT_STATUS) |
|
attr = DME_T_TST_SRC_INCREMENT; |
|
else |
|
attr = DME_TOSHIBA_GMP_INIT_STATUS; |
|
|
|
ret = gb_svc_dme_peer_get(hd->svc, intf->interface_id, attr, |
|
DME_SELECTOR_INDEX_NULL, &value); |
|
if (ret) |
|
return ret; |
|
|
|
/* |
|
* A nonzero init status indicates the module has finished |
|
* initializing. |
|
*/ |
|
if (!value) { |
|
dev_err(&intf->dev, "invalid init status\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/* |
|
* Extract the init status. |
|
* |
|
* For ES2: We need to check lowest 8 bits of 'value'. |
|
* For ES3: We need to check highest 8 bits out of 32 of 'value'. |
|
* |
|
* FIXME: Remove ES2 support |
|
*/ |
|
if (intf->quirks & GB_INTERFACE_QUIRK_NO_INIT_STATUS) |
|
init_status = value & 0xff; |
|
else |
|
init_status = value >> 24; |
|
|
|
/* |
|
* Check if the interface is executing the quirky ES3 bootrom that, |
|
* for example, requires E2EFC, CSD and CSV to be disabled. |
|
*/ |
|
bootrom_quirks = GB_INTERFACE_QUIRK_NO_CPORT_FEATURES | |
|
GB_INTERFACE_QUIRK_FORCED_DISABLE | |
|
GB_INTERFACE_QUIRK_LEGACY_MODE_SWITCH | |
|
GB_INTERFACE_QUIRK_NO_BUNDLE_ACTIVATE; |
|
|
|
s2l_quirks = GB_INTERFACE_QUIRK_NO_PM; |
|
|
|
switch (init_status) { |
|
case GB_INIT_BOOTROM_UNIPRO_BOOT_STARTED: |
|
case GB_INIT_BOOTROM_FALLBACK_UNIPRO_BOOT_STARTED: |
|
intf->quirks |= bootrom_quirks; |
|
break; |
|
case GB_INIT_S2_LOADER_BOOT_STARTED: |
|
/* S2 Loader doesn't support runtime PM */ |
|
intf->quirks &= ~bootrom_quirks; |
|
intf->quirks |= s2l_quirks; |
|
break; |
|
default: |
|
intf->quirks &= ~bootrom_quirks; |
|
intf->quirks &= ~s2l_quirks; |
|
} |
|
|
|
/* Clear the init status. */ |
|
return gb_svc_dme_peer_set(hd->svc, intf->interface_id, attr, |
|
DME_SELECTOR_INDEX_NULL, 0); |
|
} |
|
|
|
/* interface sysfs attributes */ |
|
#define gb_interface_attr(field, type) \ |
|
static ssize_t field##_show(struct device *dev, \ |
|
struct device_attribute *attr, \ |
|
char *buf) \ |
|
{ \ |
|
struct gb_interface *intf = to_gb_interface(dev); \ |
|
return scnprintf(buf, PAGE_SIZE, type"\n", intf->field); \ |
|
} \ |
|
static DEVICE_ATTR_RO(field) |
|
|
|
gb_interface_attr(ddbl1_manufacturer_id, "0x%08x"); |
|
gb_interface_attr(ddbl1_product_id, "0x%08x"); |
|
gb_interface_attr(interface_id, "%u"); |
|
gb_interface_attr(vendor_id, "0x%08x"); |
|
gb_interface_attr(product_id, "0x%08x"); |
|
gb_interface_attr(serial_number, "0x%016llx"); |
|
|
|
static ssize_t voltage_now_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
int ret; |
|
u32 measurement; |
|
|
|
ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id, |
|
GB_SVC_PWRMON_TYPE_VOL, |
|
&measurement); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to get voltage sample (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
return sprintf(buf, "%u\n", measurement); |
|
} |
|
static DEVICE_ATTR_RO(voltage_now); |
|
|
|
static ssize_t current_now_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
int ret; |
|
u32 measurement; |
|
|
|
ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id, |
|
GB_SVC_PWRMON_TYPE_CURR, |
|
&measurement); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to get current sample (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
return sprintf(buf, "%u\n", measurement); |
|
} |
|
static DEVICE_ATTR_RO(current_now); |
|
|
|
static ssize_t power_now_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
int ret; |
|
u32 measurement; |
|
|
|
ret = gb_svc_pwrmon_intf_sample_get(intf->hd->svc, intf->interface_id, |
|
GB_SVC_PWRMON_TYPE_PWR, |
|
&measurement); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to get power sample (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
return sprintf(buf, "%u\n", measurement); |
|
} |
|
static DEVICE_ATTR_RO(power_now); |
|
|
|
static ssize_t power_state_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
if (intf->active) |
|
return scnprintf(buf, PAGE_SIZE, "on\n"); |
|
else |
|
return scnprintf(buf, PAGE_SIZE, "off\n"); |
|
} |
|
|
|
static ssize_t power_state_store(struct device *dev, |
|
struct device_attribute *attr, const char *buf, |
|
size_t len) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
bool activate; |
|
int ret = 0; |
|
|
|
if (kstrtobool(buf, &activate)) |
|
return -EINVAL; |
|
|
|
mutex_lock(&intf->mutex); |
|
|
|
if (activate == intf->active) |
|
goto unlock; |
|
|
|
if (activate) { |
|
ret = gb_interface_activate(intf); |
|
if (ret) { |
|
dev_err(&intf->dev, |
|
"failed to activate interface: %d\n", ret); |
|
goto unlock; |
|
} |
|
|
|
ret = gb_interface_enable(intf); |
|
if (ret) { |
|
dev_err(&intf->dev, |
|
"failed to enable interface: %d\n", ret); |
|
gb_interface_deactivate(intf); |
|
goto unlock; |
|
} |
|
} else { |
|
gb_interface_disable(intf); |
|
gb_interface_deactivate(intf); |
|
} |
|
|
|
unlock: |
|
mutex_unlock(&intf->mutex); |
|
|
|
if (ret) |
|
return ret; |
|
|
|
return len; |
|
} |
|
static DEVICE_ATTR_RW(power_state); |
|
|
|
static const char *gb_interface_type_string(struct gb_interface *intf) |
|
{ |
|
static const char * const types[] = { |
|
[GB_INTERFACE_TYPE_INVALID] = "invalid", |
|
[GB_INTERFACE_TYPE_UNKNOWN] = "unknown", |
|
[GB_INTERFACE_TYPE_DUMMY] = "dummy", |
|
[GB_INTERFACE_TYPE_UNIPRO] = "unipro", |
|
[GB_INTERFACE_TYPE_GREYBUS] = "greybus", |
|
}; |
|
|
|
return types[intf->type]; |
|
} |
|
|
|
static ssize_t interface_type_show(struct device *dev, |
|
struct device_attribute *attr, char *buf) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
return sprintf(buf, "%s\n", gb_interface_type_string(intf)); |
|
} |
|
static DEVICE_ATTR_RO(interface_type); |
|
|
|
static struct attribute *interface_unipro_attrs[] = { |
|
&dev_attr_ddbl1_manufacturer_id.attr, |
|
&dev_attr_ddbl1_product_id.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute *interface_greybus_attrs[] = { |
|
&dev_attr_vendor_id.attr, |
|
&dev_attr_product_id.attr, |
|
&dev_attr_serial_number.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute *interface_power_attrs[] = { |
|
&dev_attr_voltage_now.attr, |
|
&dev_attr_current_now.attr, |
|
&dev_attr_power_now.attr, |
|
&dev_attr_power_state.attr, |
|
NULL |
|
}; |
|
|
|
static struct attribute *interface_common_attrs[] = { |
|
&dev_attr_interface_id.attr, |
|
&dev_attr_interface_type.attr, |
|
NULL |
|
}; |
|
|
|
static umode_t interface_unipro_is_visible(struct kobject *kobj, |
|
struct attribute *attr, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
switch (intf->type) { |
|
case GB_INTERFACE_TYPE_UNIPRO: |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
return attr->mode; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static umode_t interface_greybus_is_visible(struct kobject *kobj, |
|
struct attribute *attr, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
switch (intf->type) { |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
return attr->mode; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static umode_t interface_power_is_visible(struct kobject *kobj, |
|
struct attribute *attr, int n) |
|
{ |
|
struct device *dev = kobj_to_dev(kobj); |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
switch (intf->type) { |
|
case GB_INTERFACE_TYPE_UNIPRO: |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
return attr->mode; |
|
default: |
|
return 0; |
|
} |
|
} |
|
|
|
static const struct attribute_group interface_unipro_group = { |
|
.is_visible = interface_unipro_is_visible, |
|
.attrs = interface_unipro_attrs, |
|
}; |
|
|
|
static const struct attribute_group interface_greybus_group = { |
|
.is_visible = interface_greybus_is_visible, |
|
.attrs = interface_greybus_attrs, |
|
}; |
|
|
|
static const struct attribute_group interface_power_group = { |
|
.is_visible = interface_power_is_visible, |
|
.attrs = interface_power_attrs, |
|
}; |
|
|
|
static const struct attribute_group interface_common_group = { |
|
.attrs = interface_common_attrs, |
|
}; |
|
|
|
static const struct attribute_group *interface_groups[] = { |
|
&interface_unipro_group, |
|
&interface_greybus_group, |
|
&interface_power_group, |
|
&interface_common_group, |
|
NULL |
|
}; |
|
|
|
static void gb_interface_release(struct device *dev) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
|
|
trace_gb_interface_release(intf); |
|
|
|
kfree(intf); |
|
} |
|
|
|
#ifdef CONFIG_PM |
|
static int gb_interface_suspend(struct device *dev) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
int ret; |
|
|
|
ret = gb_control_interface_suspend_prepare(intf->control); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_control_suspend(intf->control); |
|
if (ret) |
|
goto err_hibernate_abort; |
|
|
|
ret = gb_interface_hibernate_link(intf); |
|
if (ret) |
|
return ret; |
|
|
|
/* Delay to allow interface to enter standby before disabling refclk */ |
|
msleep(GB_INTERFACE_SUSPEND_HIBERNATE_DELAY_MS); |
|
|
|
ret = gb_interface_refclk_set(intf, false); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
|
|
err_hibernate_abort: |
|
gb_control_interface_hibernate_abort(intf->control); |
|
|
|
return ret; |
|
} |
|
|
|
static int gb_interface_resume(struct device *dev) |
|
{ |
|
struct gb_interface *intf = to_gb_interface(dev); |
|
struct gb_svc *svc = intf->hd->svc; |
|
int ret; |
|
|
|
ret = gb_interface_refclk_set(intf, true); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_svc_intf_resume(svc, intf->interface_id); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_control_resume(intf->control); |
|
if (ret) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_runtime_idle(struct device *dev) |
|
{ |
|
pm_runtime_mark_last_busy(dev); |
|
pm_request_autosuspend(dev); |
|
|
|
return 0; |
|
} |
|
#endif |
|
|
|
static const struct dev_pm_ops gb_interface_pm_ops = { |
|
SET_RUNTIME_PM_OPS(gb_interface_suspend, gb_interface_resume, |
|
gb_interface_runtime_idle) |
|
}; |
|
|
|
struct device_type greybus_interface_type = { |
|
.name = "greybus_interface", |
|
.release = gb_interface_release, |
|
.pm = &gb_interface_pm_ops, |
|
}; |
|
|
|
/* |
|
* A Greybus module represents a user-replaceable component on a GMP |
|
* phone. An interface is the physical connection on that module. A |
|
* module may have more than one interface. |
|
* |
|
* Create a gb_interface structure to represent a discovered interface. |
|
* The position of interface within the Endo is encoded in "interface_id" |
|
* argument. |
|
* |
|
* Returns a pointer to the new interfce or a null pointer if a |
|
* failure occurs due to memory exhaustion. |
|
*/ |
|
struct gb_interface *gb_interface_create(struct gb_module *module, |
|
u8 interface_id) |
|
{ |
|
struct gb_host_device *hd = module->hd; |
|
struct gb_interface *intf; |
|
|
|
intf = kzalloc(sizeof(*intf), GFP_KERNEL); |
|
if (!intf) |
|
return NULL; |
|
|
|
intf->hd = hd; /* XXX refcount? */ |
|
intf->module = module; |
|
intf->interface_id = interface_id; |
|
INIT_LIST_HEAD(&intf->bundles); |
|
INIT_LIST_HEAD(&intf->manifest_descs); |
|
mutex_init(&intf->mutex); |
|
INIT_WORK(&intf->mode_switch_work, gb_interface_mode_switch_work); |
|
init_completion(&intf->mode_switch_completion); |
|
|
|
/* Invalid device id to start with */ |
|
intf->device_id = GB_INTERFACE_DEVICE_ID_BAD; |
|
|
|
intf->dev.parent = &module->dev; |
|
intf->dev.bus = &greybus_bus_type; |
|
intf->dev.type = &greybus_interface_type; |
|
intf->dev.groups = interface_groups; |
|
intf->dev.dma_mask = module->dev.dma_mask; |
|
device_initialize(&intf->dev); |
|
dev_set_name(&intf->dev, "%s.%u", dev_name(&module->dev), |
|
interface_id); |
|
|
|
pm_runtime_set_autosuspend_delay(&intf->dev, |
|
GB_INTERFACE_AUTOSUSPEND_MS); |
|
|
|
trace_gb_interface_create(intf); |
|
|
|
return intf; |
|
} |
|
|
|
static int gb_interface_vsys_set(struct gb_interface *intf, bool enable) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
int ret; |
|
|
|
dev_dbg(&intf->dev, "%s - %d\n", __func__, enable); |
|
|
|
ret = gb_svc_intf_vsys_set(svc, intf->interface_id, enable); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to set v_sys: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_refclk_set(struct gb_interface *intf, bool enable) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
int ret; |
|
|
|
dev_dbg(&intf->dev, "%s - %d\n", __func__, enable); |
|
|
|
ret = gb_svc_intf_refclk_set(svc, intf->interface_id, enable); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to set refclk: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_unipro_set(struct gb_interface *intf, bool enable) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
int ret; |
|
|
|
dev_dbg(&intf->dev, "%s - %d\n", __func__, enable); |
|
|
|
ret = gb_svc_intf_unipro_set(svc, intf->interface_id, enable); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to set UniPro: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_activate_operation(struct gb_interface *intf, |
|
enum gb_interface_type *intf_type) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
u8 type; |
|
int ret; |
|
|
|
dev_dbg(&intf->dev, "%s\n", __func__); |
|
|
|
ret = gb_svc_intf_activate(svc, intf->interface_id, &type); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to activate: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
switch (type) { |
|
case GB_SVC_INTF_TYPE_DUMMY: |
|
*intf_type = GB_INTERFACE_TYPE_DUMMY; |
|
/* FIXME: handle as an error for now */ |
|
return -ENODEV; |
|
case GB_SVC_INTF_TYPE_UNIPRO: |
|
*intf_type = GB_INTERFACE_TYPE_UNIPRO; |
|
dev_err(&intf->dev, "interface type UniPro not supported\n"); |
|
/* FIXME: handle as an error for now */ |
|
return -ENODEV; |
|
case GB_SVC_INTF_TYPE_GREYBUS: |
|
*intf_type = GB_INTERFACE_TYPE_GREYBUS; |
|
break; |
|
default: |
|
dev_err(&intf->dev, "unknown interface type: %u\n", type); |
|
*intf_type = GB_INTERFACE_TYPE_UNKNOWN; |
|
return -ENODEV; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int gb_interface_hibernate_link(struct gb_interface *intf) |
|
{ |
|
struct gb_svc *svc = intf->hd->svc; |
|
|
|
return gb_svc_intf_set_power_mode_hibernate(svc, intf->interface_id); |
|
} |
|
|
|
static int _gb_interface_activate(struct gb_interface *intf, |
|
enum gb_interface_type *type) |
|
{ |
|
int ret; |
|
|
|
*type = GB_INTERFACE_TYPE_UNKNOWN; |
|
|
|
if (intf->ejected || intf->removed) |
|
return -ENODEV; |
|
|
|
ret = gb_interface_vsys_set(intf, true); |
|
if (ret) |
|
return ret; |
|
|
|
ret = gb_interface_refclk_set(intf, true); |
|
if (ret) |
|
goto err_vsys_disable; |
|
|
|
ret = gb_interface_unipro_set(intf, true); |
|
if (ret) |
|
goto err_refclk_disable; |
|
|
|
ret = gb_interface_activate_operation(intf, type); |
|
if (ret) { |
|
switch (*type) { |
|
case GB_INTERFACE_TYPE_UNIPRO: |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
goto err_hibernate_link; |
|
default: |
|
goto err_unipro_disable; |
|
} |
|
} |
|
|
|
ret = gb_interface_read_dme(intf); |
|
if (ret) |
|
goto err_hibernate_link; |
|
|
|
ret = gb_interface_route_create(intf); |
|
if (ret) |
|
goto err_hibernate_link; |
|
|
|
intf->active = true; |
|
|
|
trace_gb_interface_activate(intf); |
|
|
|
return 0; |
|
|
|
err_hibernate_link: |
|
gb_interface_hibernate_link(intf); |
|
err_unipro_disable: |
|
gb_interface_unipro_set(intf, false); |
|
err_refclk_disable: |
|
gb_interface_refclk_set(intf, false); |
|
err_vsys_disable: |
|
gb_interface_vsys_set(intf, false); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* At present, we assume a UniPro-only module to be a Greybus module that |
|
* failed to send its mailbox poke. There is some reason to believe that this |
|
* is because of a bug in the ES3 bootrom. |
|
* |
|
* FIXME: Check if this is a Toshiba bridge before retrying? |
|
*/ |
|
static int _gb_interface_activate_es3_hack(struct gb_interface *intf, |
|
enum gb_interface_type *type) |
|
{ |
|
int retries = 3; |
|
int ret; |
|
|
|
while (retries--) { |
|
ret = _gb_interface_activate(intf, type); |
|
if (ret == -ENODEV && *type == GB_INTERFACE_TYPE_UNIPRO) |
|
continue; |
|
|
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Activate an interface. |
|
* |
|
* Locking: Caller holds the interface mutex. |
|
*/ |
|
int gb_interface_activate(struct gb_interface *intf) |
|
{ |
|
enum gb_interface_type type; |
|
int ret; |
|
|
|
switch (intf->type) { |
|
case GB_INTERFACE_TYPE_INVALID: |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
ret = _gb_interface_activate_es3_hack(intf, &type); |
|
break; |
|
default: |
|
ret = _gb_interface_activate(intf, &type); |
|
} |
|
|
|
/* Make sure type is detected correctly during reactivation. */ |
|
if (intf->type != GB_INTERFACE_TYPE_INVALID) { |
|
if (type != intf->type) { |
|
dev_err(&intf->dev, "failed to detect interface type\n"); |
|
|
|
if (!ret) |
|
gb_interface_deactivate(intf); |
|
|
|
return -EIO; |
|
} |
|
} else { |
|
intf->type = type; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Deactivate an interface. |
|
* |
|
* Locking: Caller holds the interface mutex. |
|
*/ |
|
void gb_interface_deactivate(struct gb_interface *intf) |
|
{ |
|
if (!intf->active) |
|
return; |
|
|
|
trace_gb_interface_deactivate(intf); |
|
|
|
/* Abort any ongoing mode switch. */ |
|
if (intf->mode_switch) |
|
complete(&intf->mode_switch_completion); |
|
|
|
gb_interface_route_destroy(intf); |
|
gb_interface_hibernate_link(intf); |
|
gb_interface_unipro_set(intf, false); |
|
gb_interface_refclk_set(intf, false); |
|
gb_interface_vsys_set(intf, false); |
|
|
|
intf->active = false; |
|
} |
|
|
|
/* |
|
* Enable an interface by enabling its control connection, fetching the |
|
* manifest and other information over it, and finally registering its child |
|
* devices. |
|
* |
|
* Locking: Caller holds the interface mutex. |
|
*/ |
|
int gb_interface_enable(struct gb_interface *intf) |
|
{ |
|
struct gb_control *control; |
|
struct gb_bundle *bundle, *tmp; |
|
int ret, size; |
|
void *manifest; |
|
|
|
ret = gb_interface_read_and_clear_init_status(intf); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to clear init status: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
/* Establish control connection */ |
|
control = gb_control_create(intf); |
|
if (IS_ERR(control)) { |
|
dev_err(&intf->dev, "failed to create control device: %ld\n", |
|
PTR_ERR(control)); |
|
return PTR_ERR(control); |
|
} |
|
intf->control = control; |
|
|
|
ret = gb_control_enable(intf->control); |
|
if (ret) |
|
goto err_put_control; |
|
|
|
/* Get manifest size using control protocol on CPort */ |
|
size = gb_control_get_manifest_size_operation(intf); |
|
if (size <= 0) { |
|
dev_err(&intf->dev, "failed to get manifest size: %d\n", size); |
|
|
|
if (size) |
|
ret = size; |
|
else |
|
ret = -EINVAL; |
|
|
|
goto err_disable_control; |
|
} |
|
|
|
manifest = kmalloc(size, GFP_KERNEL); |
|
if (!manifest) { |
|
ret = -ENOMEM; |
|
goto err_disable_control; |
|
} |
|
|
|
/* Get manifest using control protocol on CPort */ |
|
ret = gb_control_get_manifest_operation(intf, manifest, size); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to get manifest: %d\n", ret); |
|
goto err_free_manifest; |
|
} |
|
|
|
/* |
|
* Parse the manifest and build up our data structures representing |
|
* what's in it. |
|
*/ |
|
if (!gb_manifest_parse(intf, manifest, size)) { |
|
dev_err(&intf->dev, "failed to parse manifest\n"); |
|
ret = -EINVAL; |
|
goto err_destroy_bundles; |
|
} |
|
|
|
ret = gb_control_get_bundle_versions(intf->control); |
|
if (ret) |
|
goto err_destroy_bundles; |
|
|
|
/* Register the control device and any bundles */ |
|
ret = gb_control_add(intf->control); |
|
if (ret) |
|
goto err_destroy_bundles; |
|
|
|
pm_runtime_use_autosuspend(&intf->dev); |
|
pm_runtime_get_noresume(&intf->dev); |
|
pm_runtime_set_active(&intf->dev); |
|
pm_runtime_enable(&intf->dev); |
|
|
|
list_for_each_entry_safe_reverse(bundle, tmp, &intf->bundles, links) { |
|
ret = gb_bundle_add(bundle); |
|
if (ret) { |
|
gb_bundle_destroy(bundle); |
|
continue; |
|
} |
|
} |
|
|
|
kfree(manifest); |
|
|
|
intf->enabled = true; |
|
|
|
pm_runtime_put(&intf->dev); |
|
|
|
trace_gb_interface_enable(intf); |
|
|
|
return 0; |
|
|
|
err_destroy_bundles: |
|
list_for_each_entry_safe(bundle, tmp, &intf->bundles, links) |
|
gb_bundle_destroy(bundle); |
|
err_free_manifest: |
|
kfree(manifest); |
|
err_disable_control: |
|
gb_control_disable(intf->control); |
|
err_put_control: |
|
gb_control_put(intf->control); |
|
intf->control = NULL; |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* Disable an interface and destroy its bundles. |
|
* |
|
* Locking: Caller holds the interface mutex. |
|
*/ |
|
void gb_interface_disable(struct gb_interface *intf) |
|
{ |
|
struct gb_bundle *bundle; |
|
struct gb_bundle *next; |
|
|
|
if (!intf->enabled) |
|
return; |
|
|
|
trace_gb_interface_disable(intf); |
|
|
|
pm_runtime_get_sync(&intf->dev); |
|
|
|
/* Set disconnected flag to avoid I/O during connection tear down. */ |
|
if (intf->quirks & GB_INTERFACE_QUIRK_FORCED_DISABLE) |
|
intf->disconnected = true; |
|
|
|
list_for_each_entry_safe(bundle, next, &intf->bundles, links) |
|
gb_bundle_destroy(bundle); |
|
|
|
if (!intf->mode_switch && !intf->disconnected) |
|
gb_control_interface_deactivate_prepare(intf->control); |
|
|
|
gb_control_del(intf->control); |
|
gb_control_disable(intf->control); |
|
gb_control_put(intf->control); |
|
intf->control = NULL; |
|
|
|
intf->enabled = false; |
|
|
|
pm_runtime_disable(&intf->dev); |
|
pm_runtime_set_suspended(&intf->dev); |
|
pm_runtime_dont_use_autosuspend(&intf->dev); |
|
pm_runtime_put_noidle(&intf->dev); |
|
} |
|
|
|
/* Register an interface. */ |
|
int gb_interface_add(struct gb_interface *intf) |
|
{ |
|
int ret; |
|
|
|
ret = device_add(&intf->dev); |
|
if (ret) { |
|
dev_err(&intf->dev, "failed to register interface: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
trace_gb_interface_add(intf); |
|
|
|
dev_info(&intf->dev, "Interface added (%s)\n", |
|
gb_interface_type_string(intf)); |
|
|
|
switch (intf->type) { |
|
case GB_INTERFACE_TYPE_GREYBUS: |
|
dev_info(&intf->dev, "GMP VID=0x%08x, PID=0x%08x\n", |
|
intf->vendor_id, intf->product_id); |
|
fallthrough; |
|
case GB_INTERFACE_TYPE_UNIPRO: |
|
dev_info(&intf->dev, "DDBL1 Manufacturer=0x%08x, Product=0x%08x\n", |
|
intf->ddbl1_manufacturer_id, |
|
intf->ddbl1_product_id); |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* Deregister an interface. */ |
|
void gb_interface_del(struct gb_interface *intf) |
|
{ |
|
if (device_is_registered(&intf->dev)) { |
|
trace_gb_interface_del(intf); |
|
|
|
device_del(&intf->dev); |
|
dev_info(&intf->dev, "Interface removed\n"); |
|
} |
|
} |
|
|
|
void gb_interface_put(struct gb_interface *intf) |
|
{ |
|
put_device(&intf->dev); |
|
}
|
|
|