* Released under the GPLv2 only.
*/
+#include <linux/delay.h>
+
#include "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) \
char *buf) \
{ \
struct gb_interface *intf = to_gb_interface(dev); \
- return scnprintf(buf, PAGE_SIZE, "%"#type"\n", intf->field); \
+ return scnprintf(buf, PAGE_SIZE, type"\n", intf->field); \
} \
static DEVICE_ATTR_RO(field)
-gb_interface_attr(interface_id, u);
-gb_interface_attr(vendor_id, x);
-gb_interface_attr(product_id, x);
-gb_interface_attr(vendor_string, s);
-gb_interface_attr(product_string, s);
+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 struct attribute *interface_attrs[] = {
- &dev_attr_interface_id.attr,
+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_vendor_string.attr,
- &dev_attr_product_string.attr,
- NULL,
+ &dev_attr_serial_number.attr,
+ NULL
};
-ATTRIBUTE_GROUPS(interface);
+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
+};
-/* XXX This could be per-host device */
-static DEFINE_SPINLOCK(gb_interfaces_lock);
+static struct attribute *interface_common_attrs[] = {
+ &dev_attr_interface_id.attr,
+ &dev_attr_interface_type.attr,
+ NULL
+};
-// FIXME, odds are you don't want to call this function, rework the caller to
-// not need it please.
-struct gb_interface *gb_interface_find(struct gb_host_device *hd,
- u8 interface_id)
+static umode_t interface_unipro_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
{
- struct gb_interface *intf;
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct gb_interface *intf = to_gb_interface(dev);
- list_for_each_entry(intf, &hd->interfaces, links)
- if (intf->interface_id == interface_id)
- return intf;
+ 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 = container_of(kobj, struct device, kobj);
+ struct gb_interface *intf = to_gb_interface(dev);
+
+ switch (intf->type) {
+ case GB_INTERFACE_TYPE_GREYBUS:
+ return attr->mode;
+ default:
+ return 0;
+ }
+}
- return NULL;
+static umode_t interface_power_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, 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);
- kfree(intf->product_string);
- kfree(intf->vendor_string);
+ trace_gb_interface_release(intf);
kfree(intf);
}
-struct device_type greybus_interface_type = {
- .name = "greybus_interface",
- .release = gb_interface_release,
-};
+#ifdef CONFIG_PM_RUNTIME
+static int gb_interface_suspend(struct device *dev)
+{
+ struct gb_interface *intf = to_gb_interface(dev);
+ int ret, timesync_ret;
-/*
- * Create kernel structures corresponding to a bundle and connection for
- * managing control/svc CPort.
- */
-int gb_create_bundle_connection(struct gb_interface *intf, u8 class)
+ ret = gb_control_interface_suspend_prepare(intf->control);
+ if (ret)
+ return ret;
+
+ gb_timesync_interface_remove(intf);
+
+ 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);
+
+ timesync_ret = gb_timesync_interface_add(intf);
+ if (timesync_ret) {
+ dev_err(dev, "failed to add to timesync: %d\n", timesync_ret);
+ return timesync_ret;
+ }
+
+ return ret;
+}
+
+static int gb_interface_resume(struct device *dev)
{
- struct gb_bundle *bundle;
- u32 ida_start, ida_end;
- u8 bundle_id, protocol_id;
- u16 cport_id;
-
- if (class == GREYBUS_CLASS_CONTROL) {
- protocol_id = GREYBUS_PROTOCOL_CONTROL;
- bundle_id = GB_CONTROL_BUNDLE_ID;
- cport_id = GB_CONTROL_CPORT_ID;
- ida_start = 0;
- ida_end = intf->hd->num_cports - 1;
- } else if (class == GREYBUS_CLASS_SVC) {
- protocol_id = GREYBUS_PROTOCOL_SVC;
- bundle_id = GB_SVC_BUNDLE_ID;
- cport_id = GB_SVC_CPORT_ID;
- ida_start = GB_SVC_CPORT_ID;
- ida_end = GB_SVC_CPORT_ID + 1;
- } else {
- WARN_ON(1);
- return -EINVAL;
+ 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;
+
+ ret = gb_timesync_interface_add(intf);
+ if (ret) {
+ dev_err(dev, "failed to add to timesync: %d\n", ret);
+ return ret;
}
- bundle = gb_bundle_create(intf, bundle_id, class);
- if (!bundle)
- return -EINVAL;
+ ret = gb_timesync_schedule_synchronous(intf);
+ if (ret) {
+ dev_err(dev, "failed to synchronize FrameTime: %d\n", ret);
+ return ret;
+ }
- if (!gb_connection_create_range(bundle->intf->hd, bundle,
- cport_id, protocol_id, ida_start,
- ida_end))
- return -EINVAL;
+ 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 an Ara
+ * 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.
*
* 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_host_device *hd,
+struct gb_interface *gb_interface_create(struct gb_module *module,
u8 interface_id)
{
- struct gb_module *module;
+ struct gb_host_device *hd = module->hd;
struct gb_interface *intf;
- int retval;
-
- module = gb_module_find(hd, endo_get_module_id(hd->endo, interface_id));
- if (!module)
- return NULL;
intf = kzalloc(sizeof(*intf), GFP_KERNEL);
if (!intf)
- goto put_module;
+ 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_DEVICE_ID_BAD;
+ 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 = hd->dev.dma_mask;
+ intf->dev.dma_mask = module->dev.dma_mask;
device_initialize(&intf->dev);
- dev_set_name(&intf->dev, "%s:%d", dev_name(&module->dev), interface_id);
+ dev_set_name(&intf->dev, "%s.%u", dev_name(&module->dev),
+ interface_id);
- retval = device_add(&intf->dev);
- if (retval) {
- pr_err("failed to add interface %u\n", interface_id);
- goto free_intf;
- }
+ pm_runtime_set_autosuspend_delay(&intf->dev,
+ GB_INTERFACE_AUTOSUSPEND_MS);
- spin_lock_irq(&gb_interfaces_lock);
- list_add(&intf->links, &hd->interfaces);
- spin_unlock_irq(&gb_interfaces_lock);
+ trace_gb_interface_create(intf);
return intf;
+}
-free_intf:
- put_device(&intf->dev);
-put_module:
- put_device(&module->dev);
- return NULL;
+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;
}
/*
- * Tear down a previously set up interface.
+ * 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?
*/
-void gb_interface_remove(struct gb_interface *intf)
+static int _gb_interface_activate_es3_hack(struct gb_interface *intf,
+ enum gb_interface_type *type)
{
- struct gb_module *module;
- struct gb_bundle *bundle;
- struct gb_bundle *next;
+ int retries = 3;
+ int ret;
- if (WARN_ON(!intf))
- return;
+ while (retries--) {
+ ret = _gb_interface_activate(intf, type);
+ if (ret == -ENODEV && *type == GB_INTERFACE_TYPE_UNIPRO)
+ continue;
- spin_lock_irq(&gb_interfaces_lock);
- list_del(&intf->links);
- spin_unlock_irq(&gb_interfaces_lock);
+ break;
+ }
- list_for_each_entry_safe(bundle, next, &intf->bundles, links)
- gb_bundle_destroy(bundle);
+ 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);
- module = intf->module;
- device_unregister(&intf->dev);
- put_device(&module->dev);
+ return -EIO;
+ }
+ } else {
+ intf->type = type;
+ }
+
+ return ret;
}
-void gb_interfaces_remove(struct gb_host_device *hd)
+/*
+ * Deactivate an interface.
+ *
+ * Locking: Caller holds the interface mutex.
+ */
+void gb_interface_deactivate(struct gb_interface *intf)
{
- struct gb_interface *intf, *temp;
+ if (!intf->active)
+ return;
- list_for_each_entry_safe(intf, temp, &hd->interfaces, links)
- gb_interface_remove(intf);
+ 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;
}
-/**
- * gb_interface_init
+/*
+ * Enable an interface by enabling its control connection, fetching the
+ * manifest and other information over it, and finally registering its child
+ * devices.
*
- * Create connection for control CPort and then request/parse manifest.
- * Finally initialize all the bundles to set routes via SVC and initialize all
- * connections.
+ * Locking: Caller holds the interface mutex.
*/
-int gb_interface_init(struct gb_interface *intf, u8 device_id)
+int gb_interface_enable(struct gb_interface *intf)
{
+ struct gb_control *control;
+ struct gb_bundle *bundle, *tmp;
int ret, size;
void *manifest;
- intf->device_id = device_id;
-
- /* Establish control CPort connection */
- ret = gb_create_bundle_connection(intf, GREYBUS_CLASS_CONTROL);
+ ret = gb_interface_read_and_clear_init_status(intf);
if (ret) {
- dev_err(&intf->dev, "Failed to create control CPort connection (%d)\n", 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, "%s: Failed to get manifest size (%d)\n",
- __func__, size);
+ dev_err(&intf->dev, "failed to get manifest size: %d\n", size);
+
if (size)
- return size;
+ ret = size;
else
- return -EINVAL;
+ ret = -EINVAL;
+
+ goto err_disable_control;
}
manifest = kmalloc(size, GFP_KERNEL);
- if (!manifest)
- return -ENOMEM;
+ 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, "%s: Failed to get manifest\n", __func__);
- goto free_manifest;
+ dev_err(&intf->dev, "failed to get manifest: %d\n", ret);
+ goto err_free_manifest;
}
/*
* what's in it.
*/
if (!gb_manifest_parse(intf, manifest, size)) {
- dev_err(&intf->dev, "%s: Failed to parse manifest\n", __func__);
+ dev_err(&intf->dev, "failed to parse manifest\n");
ret = -EINVAL;
- goto free_manifest;
+ goto err_destroy_bundles;
}
- /*
- * XXX
- * We've successfully parsed the manifest. Now we need to
- * allocate CPort Id's for connecting to the CPorts found on
- * other modules. For each of these, establish a connection
- * between the local and remote CPorts (including
- * configuring the switch to allow them to communicate).
- */
+ 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;
+
+ ret = gb_timesync_interface_add(intf);
+ if (ret) {
+ dev_err(&intf->dev, "failed to add to timesync: %d\n", 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;
+ }
+ }
-free_manifest:
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_timesync_interface_remove(intf);
+ 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);
+}
+
+/* Enable TimeSync on an Interface control connection. */
+int gb_interface_timesync_enable(struct gb_interface *intf, u8 count,
+ u64 frame_time, u32 strobe_delay, u32 refclk)
+{
+ return gb_control_timesync_enable(intf->control, count,
+ frame_time, strobe_delay,
+ refclk);
+}
+
+/* Disable TimeSync on an Interface control connection. */
+int gb_interface_timesync_disable(struct gb_interface *intf)
+{
+ return gb_control_timesync_disable(intf->control);
+}
+
+/* Transmit the Authoritative FrameTime via an Interface control connection. */
+int gb_interface_timesync_authoritative(struct gb_interface *intf,
+ u64 *frame_time)
+{
+ return gb_control_timesync_authoritative(intf->control,
+ frame_time);
+}
+
+/* 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);
+ /* fall-through */
+ 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);
+}
projects / cascardo / linux.git / blobdiff