@@ -158,4 +158,5 @@ source "drivers/irqchip/Kconfig"
source "drivers/ipack/Kconfig"
+source "drivers/tdm/Kconfig"
endmenu
@@ -112,6 +112,7 @@ obj-$(CONFIG_INFINIBAND) += infiniband/
obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
+obj-$(CONFIG_TDM) += tdm/
obj-$(CONFIG_SUPERH) += sh/
obj-$(CONFIG_ARCH_SHMOBILE) += sh/
ifndef CONFIG_ARCH_USES_GETTIMEOFFSET
new file mode 100644
@@ -0,0 +1,25 @@
+#
+# TDM subsystem configuration
+#
+
+menuconfig TDM
+ tristate "TDM support"
+ ---help---
+ More information is contained in the directory <file:Documentation/tdm/>,
+ especially in the file called "summary" there.
+ If you want TDM support, you should say Y here and also to the
+ specific driver for your bus adapter(s) below.
+
+ This TDM support can also be built as a module. If so, the module
+ will be called tdm-core.
+
+if TDM
+
+config TDM_DEBUG_CORE
+ bool "TDM Core debugging messages"
+ help
+ Say Y here if you want the TDM core to produce a bunch of debug
+ messages to the system log. Select this if you are having a
+ problem with TDM support and want to see more of what is going on.
+
+endif # TDM
new file mode 100644
@@ -0,0 +1,8 @@
+#
+# Makefile for the TDM core.
+#
+
+obj-$(CONFIG_TDM) += tdm-core.o
+ifeq ($(CONFIG_TDM_DEBUG_CORE),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
new file mode 100644
@@ -0,0 +1,1198 @@
+/* driver/tdm/tdm-core.c
+ *
+ * Copyright (C) 2012 Freescale Semiconductor, Inc, All rights reserved.
+ *
+ * TDM core is the interface between TDM clients and TDM devices.
+ * It is also intended to serve as an interface for line controld
+ * devices later on.
+ *
+ * Author:Hemant Agrawal <hemant@freescale.com>
+ * Rajesh Gumasta <rajesh.gumasta@freescale.com>
+ *
+ * Modified by Sandeep Kr Singh <sandeep@freescale.com>
+ * Poonam Aggarwal <poonam.aggarwal@freescale.com>
+ * 1. Added framework based initilization of device.
+ * 2. All the init/run time configuration is now done by framework.
+ * 3. Added channel level operations.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/* if read write debug required */
+#undef TDM_CORE_DEBUG
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/tdm.h>
+#include <linux/init.h>
+#include <linux/idr.h>
+#include <linux/mutex.h>
+#include <linux/completion.h>
+#include <linux/hardirq.h>
+#include <linux/irqflags.h>
+#include <linux/list.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
+
+
+static DEFINE_MUTEX(tdm_core_lock);
+static DEFINE_MUTEX(tdm_adapter_lock);
+static DEFINE_IDR(tdm_adapter_idr);
+/* List of TDM adapters registered with TDM framework */
+LIST_HEAD(tdm_adapter_list);
+
+/* List of TDM phys registered with TDM framework */
+LIST_HEAD(tdm_phy_list);
+
+/* List of TDM clients registered with TDM framework */
+LIST_HEAD(tdm_driver_list);
+
+/* In case the previous data is not fetched by the client driver, the
+ * de-interleaving function will discard the old data and rewrite the
+ * new data */
+static int use_latest_tdm_data = 1;
+
+/* this tasklet is created for each adapter instance */
+static void tdm_data_tasklet_fn(unsigned long);
+
+/* tries to match client driver with the adapter */
+static int tdm_device_match(struct tdm_driver *driver, struct tdm_adapter *adap)
+{
+ /* match on an id table if there is one */
+ if (driver->id_table && driver->id_table->name[0]) {
+ if (!(strcmp(driver->id_table->name, adap->name)))
+ return (int)driver->id_table;
+ }
+ return TDM_E_OK;
+}
+
+static int tdm_attach_driver_adap(struct tdm_driver *driver,
+ struct tdm_adapter *adap)
+{
+ int ret = TDM_E_OK;
+ /* if driver is already attached to any other adapter, return*/
+ if (driver->adapter && (driver->adapter != adap))
+ return ret;
+
+ driver->adapter = adap;
+
+ if (driver->attach_adapter) {
+ ret = driver->attach_adapter(adap);
+ if (ret < 0) {
+ pr_err("attach_adapter failed for driver [%s] err:%d\n"
+ , driver->name, ret);
+ return ret;
+ }
+ }
+ adap->drv_count++;
+
+ if (!adap->tasklet_conf) {
+ tasklet_init(&adap->tdm_data_tasklet, tdm_data_tasklet_fn,
+ (unsigned long)adap);
+ adap->tasklet_conf = 1;
+ }
+
+ return ret;
+}
+
+/* Detach client driver and adapter */
+static int tdm_detach_driver_adap(struct tdm_driver *driver,
+ struct tdm_adapter *adap)
+{
+ int res = TDM_E_OK;
+
+ if (!driver->adapter || (driver->adapter != adap))
+ return TDM_E_OK;
+
+ if (!driver->detach_adapter)
+ return TDM_E_OK;
+
+ adap->drv_count--;
+
+ /* If no more driver is registed with the adapter*/
+ if (!adap->drv_count && adap->tasklet_conf) {
+ tasklet_disable(&adap->tdm_data_tasklet);
+ tasklet_kill(&adap->tdm_data_tasklet);
+ adap->tasklet_conf = 0;
+ }
+
+ if (driver->detach_adapter) {
+ if (driver->detach_adapter(adap))
+ pr_err("detach_adapter failed for driver [%s]\n",
+ driver->name);
+ }
+
+ driver->adapter = NULL;
+ return res;
+}
+
+/* TDM adapter Registration/De-registration with TDM framework */
+
+static int tdm_register_adapter(struct tdm_adapter *adap)
+{
+ int res = TDM_E_OK;
+ struct tdm_driver *driver, *next;
+
+ mutex_init(&adap->adap_lock);
+ INIT_LIST_HEAD(&adap->myports);
+ spin_lock_init(&adap->portlist_lock);
+
+ adap->drv_count = 0;
+ adap->tasklet_conf = 0;
+
+ list_add_tail(&adap->list, &tdm_adapter_list);
+
+ /* initialization of driver by framework in default configuration */
+ init_config_adapter(adap);
+
+ /* Notify drivers */
+ pr_info("adapter [%s] registered\n", adap->name);
+ mutex_lock(&tdm_core_lock);
+ list_for_each_entry_safe(driver, next, &tdm_driver_list, list) {
+ if (tdm_device_match(driver, adap)) {
+ res = tdm_attach_driver_adap(driver, adap);
+ if (res == TDM_E_OK) {
+ pr_info("Driver(ID=%d) is "
+ "attached with Adapter %s(ID = %d)\n",
+ driver->id, adap->name, adap->id);
+ } else {
+ pr_err("Driver(ID=%d) is unable "
+ "to attach with Adapter %s(ID = %d)\n",
+ driver->id, adap->name, adap->id);
+ }
+ }
+ }
+ mutex_unlock(&tdm_core_lock);
+
+ return res;
+}
+
+/*
+ * tdm_add_adapter - declare tdm adapter, use dynamic device number
+ * @adapter: the adapter to add
+ * Context: can sleep
+ *
+ * This routine is used to declare a TDM adapter
+ * When this returns zero, a new device number will be allocated and stored
+ * in adap->id, and the specified adapter became available for the clients.
+ * Otherwise, a negative errno value is returned.
+ */
+int tdm_add_adapter(struct tdm_adapter *adapter)
+{
+ int id, res = TDM_E_OK;
+ if (!adapter) {
+ pr_err("%s:Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+retry:
+ if (idr_pre_get(&tdm_adapter_idr, GFP_KERNEL) == 0)
+ return -ENOMEM;
+
+ mutex_lock(&tdm_core_lock);
+ res = idr_get_new(&tdm_adapter_idr, adapter, &id);
+ mutex_unlock(&tdm_core_lock);
+
+ if (res < 0) {
+ if (res == -EAGAIN)
+ goto retry;
+ return res;
+ }
+
+ adapter->id = id;
+ return tdm_register_adapter(adapter);
+}
+EXPORT_SYMBOL(tdm_add_adapter);
+
+/**
+ * tdm_del_adapter - unregister TDM adapter
+ * @adap: the adapter being unregistered
+ *
+ * This unregisters an TDM adapter which was previously registered
+ * by @tdm_add_adapter.
+ */
+int tdm_del_adapter(struct tdm_adapter *adap)
+{
+ int res = TDM_E_OK;
+ struct tdm_adapter *found;
+ struct tdm_driver *driver, *next;
+
+ if (!adap) {
+ pr_err("%s:Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+ /* First make sure that this adapter was ever added */
+ mutex_lock(&tdm_core_lock);
+ found = idr_find(&tdm_adapter_idr, adap->id);
+ mutex_unlock(&tdm_core_lock);
+ if (found != adap) {
+ pr_err("tdm-core: attempting to delete unregistered "
+ "adapter [%s]\n", adap->name);
+ return -EINVAL;
+ }
+
+ /*disable and kill the data processing tasklet */
+ if (adap->tasklet_conf) {
+ tasklet_disable(&adap->tdm_data_tasklet);
+ tasklet_kill(&adap->tdm_data_tasklet);
+ adap->tasklet_conf = 0;
+ }
+
+ /* Detach any active ports. This can't fail, thus we do not
+ checking the returned value. */
+ mutex_lock(&tdm_core_lock);
+ list_for_each_entry_safe(driver, next, &tdm_driver_list, list) {
+ if (tdm_device_match(driver, adap)) {
+ tdm_detach_driver_adap(driver, adap);
+ pr_info(
+ "Driver(ID=%d) is detached from Adapter %s(ID = %d)\n",
+ driver->id, adap->name, adap->id);
+ }
+ }
+ mutex_unlock(&tdm_core_lock);
+
+ mutex_lock(&tdm_core_lock);
+ idr_remove(&tdm_adapter_idr, adap->id);
+ mutex_unlock(&tdm_core_lock);
+
+ pr_debug("adapter [%s] unregistered\n", adap->name);
+
+ list_del(&adap->list);
+ /* Clear the device structure in case this adapter is ever going to be
+ added again */
+ adap->parent = NULL;
+
+ return res;
+}
+EXPORT_SYMBOL(tdm_del_adapter);
+
+/* TDM Client Drivers Registration/De-registration Functions */
+int tdm_register_driver(struct tdm_driver *driver)
+{
+ int res = TDM_E_OK;
+ struct tdm_adapter *adap, *next;
+
+ list_add_tail(&driver->list, &tdm_driver_list);
+
+ mutex_lock(&tdm_core_lock);
+ /* Walk the adapters that are already present */
+ list_for_each_entry_safe(adap, next, &tdm_adapter_list, list) {
+ if (tdm_device_match(driver, adap)) {
+ res = tdm_attach_driver_adap(driver, adap);
+ if (res == TDM_E_OK) {
+ pr_info("TDM Driver(ID=%d)is attached with "
+ "Adapter%s(ID = %d) drv_count=%d",
+ driver->id, adap->name, adap->id,
+ adap->drv_count);
+ } else {
+ pr_err("TDM Driver(ID=%d) unable to attach "
+ "to Adapter%s(ID = %d) drv_count=%d",
+ driver->id, adap->name, adap->id,
+ adap->drv_count);
+ }
+ break;
+ }
+ }
+ mutex_unlock(&tdm_core_lock);
+
+ return res;
+}
+EXPORT_SYMBOL(tdm_register_driver);
+
+/*
+ * tdm_unregister_driver - unregister TDM client driver from TDM framework
+ * @driver: the driver being unregistered
+ */
+void tdm_unregister_driver(struct tdm_driver *driver)
+{
+ if (!driver) {
+ pr_err("%s:Invalid handle\n", __func__);
+ return;
+ }
+ /* A driver can register to only one adapter,
+ * so no need to browse the list */
+ mutex_lock(&tdm_core_lock);
+ tdm_detach_driver_adap(driver, driver->adapter);
+ mutex_unlock(&tdm_core_lock);
+
+ list_del(&driver->list);
+
+ pr_debug("tdm-core: driver [%s] unregistered\n", driver->name);
+}
+EXPORT_SYMBOL(tdm_unregister_driver);
+
+/* TDM Framework init and exit */
+static int __init tdm_init(void)
+{
+ pr_info("%s\n", __func__);
+ return TDM_E_OK;
+}
+
+static void __exit tdm_exit(void)
+{
+ pr_info("%s\n", __func__);
+ return;
+}
+
+/* We must initialize early, because some subsystems register tdm drivers
+ * in subsys_initcall() code, but are linked (and initialized) before tdm.
+ */
+postcore_initcall(tdm_init);
+module_exit(tdm_exit);
+
+
+/* Interface to the tdm device/adapter */
+
+/* tdm_adap_send - issue a TDM write
+ * @adap: Handle to TDM device
+ * @buf: Data that will be written to the TDM device
+ * @count: How many bytes to write
+ *
+ * Returns negative errno, or else the number of bytes written.
+ */
+int tdm_adap_send(struct tdm_adapter *adap, void **buf, int count)
+{
+ int res;
+
+ if ((adap == NULL) || (buf == NULL)) { /* invalid handle*/
+ pr_err("%s: Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+
+ if (adap->algo->tdm_write)
+ res = adap->algo->tdm_write(adap, buf, count);
+ else {
+ pr_err("TDM level write not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* If everything went ok (i.e. frame transmitted), return #bytes
+ transmitted, else error code. */
+ return (res == 1) ? count : res;
+}
+EXPORT_SYMBOL(tdm_adap_send);
+
+/**
+ * tdm_adap_recv - issue a TDM read
+ * @adap: Handle to TDM device
+ * @buf: Where to store data read from TDM device
+ *
+ * Returns negative errno, or else the number of bytes read.
+ */
+int tdm_adap_recv(struct tdm_adapter *adap, void **buf)
+{
+ int res;
+
+ if (adap->algo->tdm_read)
+ res = adap->algo->tdm_read(adap, (u16 **)buf);
+ else {
+ pr_err("TDM level read not supported\n");
+ return -EOPNOTSUPP;
+ }
+ /* If everything went ok (i.e. frame received), return #bytes
+ transmitted, else error code. */
+ return res;
+}
+
+/**
+ * tdm_adap_get_write_buf - get next write TDM device buffer
+ * @adap: Handle to TDM device
+ * @buf: pointer to TDM device buffer
+ *
+ * Returns negative errno, or else size of the write buffer.
+ */
+int tdm_adap_get_write_buf(struct tdm_adapter *adap, void **buf)
+{
+ int res;
+
+ if (adap->algo->tdm_get_write_buf) {
+ res = adap->algo->tdm_get_write_buf(adap, (u16 **)buf);
+ } else {
+ pr_err("TDM level write buf get not supported\n");
+ return -EOPNOTSUPP;
+ }
+ /* If everything went ok (i.e. 1 msg received), return #bytes
+ transmitted, else error code. */
+ return res;
+}
+EXPORT_SYMBOL(tdm_adap_get_write_buf);
+
+int tdm_adap_enable(struct tdm_driver *drv)
+{
+ int res;
+ struct tdm_adapter *adap;
+ if (drv == NULL) { /* invalid handle*/
+ pr_err("%s: Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+ adap = drv->adapter;
+
+ if (adap->algo->tdm_enable) {
+ res = adap->algo->tdm_enable(adap);
+ } else {
+ pr_err("TDM level enable not supported\n");
+ return -EOPNOTSUPP;
+ }
+ return res;
+}
+EXPORT_SYMBOL(tdm_adap_enable);
+
+int tdm_adap_disable(struct tdm_driver *drv)
+{
+ int res;
+ struct tdm_adapter *adap;
+ if (drv == NULL) { /* invalid handle*/
+ pr_err("%s: Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+ adap = drv->adapter;
+
+ if (adap->algo->tdm_disable) {
+ res = adap->algo->tdm_disable(adap);
+ } else {
+ pr_err("TDM level enable not supported\n");
+ return -EOPNOTSUPP;
+ }
+ return res;
+}
+EXPORT_SYMBOL(tdm_adap_disable);
+
+struct tdm_adapter *tdm_get_adapter(int id)
+{
+ struct tdm_adapter *adapter;
+
+ mutex_lock(&tdm_core_lock);
+ adapter = idr_find(&tdm_adapter_idr, id);
+ if (adapter && !try_module_get(adapter->owner))
+ adapter = NULL;
+
+ mutex_unlock(&tdm_core_lock);
+
+ return adapter;
+}
+EXPORT_SYMBOL(tdm_get_adapter);
+
+void tdm_put_adapter(struct tdm_adapter *adap)
+{
+ module_put(adap->owner);
+}
+EXPORT_SYMBOL(tdm_put_adapter);
+
+
+/* Port Level APIs of TDM Framework */
+unsigned int tdm_port_open(struct tdm_driver *driver, void **h_port)
+{
+ struct tdm_port *port;
+ struct tdm_adapter *adap;
+ unsigned long flags;
+ int res = TDM_E_OK;
+
+ if (driver == NULL) {
+ pr_err("driver NULL\n");
+ return -ENODEV;
+ }
+ if (driver->adapter == NULL) {
+ pr_err("adapter NULL\n");
+ return -ENODEV;
+ }
+
+ adap = tdm_get_adapter(driver->adapter->id);
+ if (!adap)
+ return -ENODEV;
+
+ /* This creates an anonymous tdm_port, which may later be
+ * pointed to some slot.
+ *
+ */
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port) {
+ res = -ENOMEM;
+ goto out;
+ }
+
+ port->rx_max_frames = NUM_SAMPLES_PER_FRAME;
+ port->port_cfg.port_mode = e_TDM_PORT_CHANNELIZED;
+
+ port->in_use = 1;
+
+ snprintf(driver->name, TDM_NAME_SIZE, "tdm-dev");
+ port->driver = driver;
+ port->adapter = adap;
+
+ spin_lock_irqsave(&adap->portlist_lock, flags);
+ list_add_tail(&port->list, &adap->myports);
+ spin_unlock_irqrestore(&adap->portlist_lock, flags);
+
+ INIT_LIST_HEAD(&port->mychannels);
+
+ *h_port = port;
+
+out:
+ return res;
+}
+EXPORT_SYMBOL(tdm_port_open);
+
+unsigned int tdm_port_close(void *h_port)
+{
+ struct tdm_adapter *adap;
+ struct tdm_driver *driver;
+ struct tdm_port *port;
+ struct tdm_channel *temp, *channel;
+ unsigned long flags;
+ int res = TDM_E_OK;
+ port = (struct tdm_port *)h_port;
+
+ if (port == NULL) { /* invalid handle*/
+ pr_err("Invalid Handle");
+ return -ENXIO;
+ }
+
+ driver = port->driver;
+
+ if (driver == NULL) {
+ pr_err("driver NULL\n");
+ res = -ENODEV;
+ goto out;
+ }
+ if (driver->adapter == NULL) {
+ pr_err("adapter NULL\n");
+ res = -ENODEV;
+ goto out;
+ }
+
+ list_for_each_entry_safe(channel, temp, &port->mychannels, list) {
+ if (channel)
+ if (channel->in_use) {
+ pr_err("%s: Cannot close port. Channel in use\n",
+ __func__);
+ res = -ENXIO;
+ goto out;
+ }
+ }
+ adap = driver->adapter;
+
+ spin_lock_irqsave(&adap->portlist_lock, flags);
+ list_del(&port->list);
+ spin_unlock_irqrestore(&adap->portlist_lock, flags);
+
+ if (port->p_port_data != NULL) {
+ int i;
+ struct tdm_bd *ch_bd;
+
+ /* If the tdm is in channelised mode,
+ de-allocate the channelised buffer */
+ ch_bd = &(port->p_port_data->rx_data_fifo[0]);
+ for (i = 0; ch_bd && i < TDM_CH_RX_BD_RING_SIZE; i++) {
+ ch_bd->flag = 0;
+ ch_bd++;
+ }
+ ch_bd = &(port->p_port_data->tx_data_fifo[0]);
+ for (i = 0; ch_bd && i < TDM_CH_TX_BD_RING_SIZE; i++) {
+ ch_bd->flag = 0;
+ ch_bd++;
+ }
+ kfree(port->p_port_data);
+ }
+ kfree(port);
+ return res;
+out:
+ if (port)
+ kfree(port->p_port_data);
+ kfree(port);
+ return res;
+}
+EXPORT_SYMBOL(tdm_port_close);
+
+unsigned int tdm_channel_read(void *h_port, void *h_channel,
+ void *p_data, u16 *size)
+{
+ struct tdm_port *port;
+ struct tdm_channel *channel;
+ struct tdm_bd *rx_bd;
+ unsigned long flags;
+ int i, res = TDM_E_OK;
+ unsigned short *buf, *buf1;
+ port = (struct tdm_port *)h_port;
+ channel = (struct tdm_channel *)h_channel;
+
+ if ((port && channel) == 0) { /* invalid handle*/
+ pr_err("%s:Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+
+ if (!port->in_use)
+ return -EIO;
+ if (!channel->p_ch_data || !channel->in_use)
+ return -EIO;
+
+ spin_lock_irqsave(&channel->p_ch_data->rx_channel_lock, flags);
+ rx_bd = channel->p_ch_data->rx_out_data;
+
+ if (rx_bd->flag) {
+ *size = rx_bd->length;
+ buf = (u16 *) p_data;
+ buf1 = (u16 *)rx_bd->p_data;
+ for (i = 0; i < NUM_SAMPLES_PER_FRAME; i++)
+ buf[i] = buf1[i];
+ rx_bd->flag = 0;
+ rx_bd->offset = 0;
+ channel->p_ch_data->rx_out_data = (rx_bd->wrap) ?
+ channel->p_ch_data->rx_data_fifo : rx_bd + 1;
+
+ } else {
+ spin_unlock_irqrestore(&channel->p_ch_data->rx_channel_lock,
+ flags);
+ pr_info("No Data Available");
+ return -EAGAIN;
+ }
+ spin_unlock_irqrestore(&channel->p_ch_data->rx_channel_lock, flags);
+
+ return res;
+}
+EXPORT_SYMBOL(tdm_channel_read);
+
+
+unsigned int tdm_channel_write(void *h_port, void *h_channel,
+ void *p_data, u16 size)
+{
+ struct tdm_port *port;
+ struct tdm_channel *channel;
+ struct tdm_bd *tx_bd;
+ unsigned long flags;
+ int err = TDM_E_OK;
+ port = (struct tdm_port *)h_port;
+ channel = (struct tdm_channel *)h_channel;
+#ifdef TDM_CORE_DEBUG
+ bool data_flag = 0;
+#endif
+
+ if ((port && channel) == 0) { /* invalid handle*/
+ pr_err("Invalid Handle");
+ return -ENXIO;
+ }
+
+ if (p_data == NULL) { /* invalid data*/
+ pr_err("Invalid Data");
+ return -EFAULT;
+ }
+
+ if (!port->in_use)
+ return -EIO;
+ if (!channel->p_ch_data || !channel->in_use)
+ return -EIO;
+
+ spin_lock_irqsave(&channel->p_ch_data->tx_channel_lock, flags);
+ tx_bd = channel->p_ch_data->tx_in_data;
+
+ if (!tx_bd->flag) {
+ tx_bd->length = size;
+ memcpy(tx_bd->p_data, p_data,
+ size * port->adapter->adapt_cfg.slot_width);
+ tx_bd->flag = 1;
+ tx_bd->offset = 0;
+ channel->p_ch_data->tx_in_data = (tx_bd->wrap) ?
+ channel->p_ch_data->tx_data_fifo : tx_bd+1;
+ port->port_stat.tx_pkt_count++;
+#ifdef TDM_CORE_DEBUG
+ data_flag = 1;
+#endif
+ } else {
+ spin_unlock_irqrestore(&channel->p_ch_data->tx_channel_lock,
+ flags);
+ port->port_stat.tx_pkt_drop_count++;
+ pr_err("E_NO_MEMORY -Failed Transmit");
+ return -ENOMEM;
+ }
+ spin_unlock_irqrestore(&channel->p_ch_data->tx_channel_lock, flags);
+
+#ifdef TDM_CORE_DEBUG
+ if (data_flag) {
+ int k;
+ pr_info("\nTX port:%d - Write - Port TX-%d\n",
+ port->port_id, size);
+ for (k = 0; k < size; k++)
+ pr_info("%x", p_data[k]);
+ pr_info("\n");
+ }
+#endif
+ return err;
+}
+EXPORT_SYMBOL(tdm_channel_write);
+
+/* Driver Function for select and poll. Based on Channel, it sleeps on
+ * waitqueue */
+unsigned int tdm_ch_poll(void *h_channel, unsigned int wait_time)
+{
+ struct tdm_channel *channel;
+ unsigned long timeout = msecs_to_jiffies(wait_time);
+ channel = h_channel;
+
+ if (!channel->p_ch_data || !channel->in_use)
+ return -EIO;
+
+ if (channel->p_ch_data->rx_out_data->flag) {
+ pr_debug("Data Available");
+ return TDM_E_OK;
+ }
+ if (timeout) {
+ wait_event_interruptible_timeout(channel->ch_wait_queue,
+ channel->p_ch_data->rx_out_data->flag,
+ timeout);
+
+ if (channel->p_ch_data->rx_out_data->flag) {
+ pr_debug("Data Available");
+ return TDM_E_OK;
+ }
+ }
+ return -EAGAIN;
+}
+EXPORT_SYMBOL(tdm_ch_poll);
+
+unsigned int tdm_port_get_stats(void *h_port, struct tdm_port_stats *portStat)
+{
+ struct tdm_port *port;
+ int port_num;
+ port = (struct tdm_port *)h_port;
+
+ if (port == NULL || portStat == NULL) { /* invalid handle*/
+ pr_err("Invalid Handle");
+ return -ENXIO;
+ }
+ port_num = port->port_id;
+
+ memcpy(portStat, &port->port_stat, sizeof(struct tdm_port_stats));
+
+ pr_info("TDM Port %d Get Stats", port_num);
+
+ return TDM_E_OK;
+}
+EXPORT_SYMBOL(tdm_port_get_stats);
+
+/* Data handling functions */
+
+static int tdm_data_rx_deinterleave(struct tdm_adapter *adap)
+{
+ struct tdm_port *port, *next;
+ struct tdm_channel *channel, *temp;
+ struct tdm_bd *ch_bd;
+
+ int i, buf_size, ch_data_len;
+ u16 *input_tdm_buffer;
+ u16 *pcm_buffer;
+ int slot_width;
+ int frame_ch_data_size;
+ bool ch_data;
+ int bytes_in_fifo_per_frame;
+ int bytes_slot_offset;
+
+ ch_data_len = NUM_SAMPLES_PER_FRAME;
+ frame_ch_data_size = NUM_SAMPLES_PER_FRAME;
+ ch_data = 0;
+
+ if (!adap) { /* invalid handle*/
+ pr_err("%s: Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+
+ slot_width = adap->adapt_cfg.slot_width;
+ buf_size = tdm_adap_recv(adap, (void **)&input_tdm_buffer);
+ if (buf_size <= 0 || !input_tdm_buffer)
+ return -EINVAL;
+
+ bytes_in_fifo_per_frame = buf_size/frame_ch_data_size;
+ bytes_slot_offset = bytes_in_fifo_per_frame/slot_width;
+
+ /* de-interleaving for all ports*/
+ list_for_each_entry_safe(port, next, &adap->myports, list) {
+
+ /* if the port is not open */
+ if (!port->in_use)
+ continue;
+
+ list_for_each_entry_safe(channel, temp, &port->mychannels,
+ list) {
+ /* if the channel is not open */
+ if (!channel->in_use || !channel->p_ch_data)
+ continue;
+ ch_bd = channel->p_ch_data->rx_in_data;
+ spin_lock(&channel->p_ch_data->rx_channel_lock);
+ /*if old data is to be discarded */
+ if (use_latest_tdm_data)
+ if (ch_bd->flag) {
+ ch_bd->flag = 0;
+ ch_bd->offset = 0;
+ if (ch_bd == channel->p_ch_data->rx_out_data)
+ channel->p_ch_data->rx_out_data =
+ ch_bd->wrap ?
+ channel->p_ch_data->rx_data_fifo
+ : ch_bd+1;
+ port->port_stat.rx_pkt_drop_count++;
+ }
+ /* if the bd is empty */
+ if (!ch_bd->flag) {
+ if (ch_bd->offset == 0)
+ ch_bd->length = port->rx_max_frames;
+
+ pcm_buffer = ch_bd->p_data + ch_bd->offset;
+ /* De-interleaving the data */
+ for (i = 0; i < ch_data_len; i++) {
+ pcm_buffer[i]
+ = input_tdm_buffer[i*bytes_slot_offset +
+ channel->ch_id];
+ }
+ ch_bd->offset += ch_data_len * slot_width;
+
+ if (ch_bd->offset >=
+ (ch_bd->length - frame_ch_data_size)*
+ (adap->adapt_cfg.slot_width)) {
+ ch_bd->flag = 1;
+ ch_bd->offset = 0;
+ channel->p_ch_data->rx_in_data =
+ ch_bd->wrap ?
+ channel->p_ch_data->rx_data_fifo
+ : ch_bd+1;
+ ch_data = 1;
+ wake_up_interruptible
+ (&channel->ch_wait_queue);
+ }
+ } else {
+ port->port_stat.rx_pkt_drop_count++;
+ }
+ spin_unlock(&channel->p_ch_data->rx_channel_lock);
+ }
+
+ if (ch_data) {
+ /* Wake up the Port Data Poll event */
+#ifdef TDM_CORE_DEBUG
+ pr_info("Port RX-%d-%d\n", channel->ch_id, ch_data_len);
+ for (i = 0; i < ch_data_len; i++)
+ pr_info("%x", pcm_buffer[i]);
+ pr_info("\n");
+#endif
+ port->port_stat.rx_pkt_count++;
+ ch_data = 0;
+ }
+ }
+ return TDM_E_OK;
+}
+
+static int tdm_data_tx_interleave(struct tdm_adapter *adap)
+{
+ struct tdm_port *port, *next;
+ struct tdm_channel *channel, *temp;
+ struct tdm_bd *ch_bd;
+ int i, buf_size, ch_data_len = NUM_SAMPLES_PER_FRAME;
+ bool last_data = 0;
+ u16 *output_tdm_buffer;
+ u16 *pcm_buffer;
+ int frame_ch_data_size = NUM_SAMPLES_PER_FRAME;
+ int bytes_in_fifo_per_frame;
+ int bytes_slot_offset;
+
+#ifdef TDM_CORE_DEBUG
+ u8 data_flag = 0;
+#endif
+
+ if (adap == NULL) { /* invalid handle*/
+ pr_err("%s: Invalid Handle\n", __func__);
+ return -ENXIO;
+ }
+
+ buf_size = tdm_adap_get_write_buf(adap, (void **)&output_tdm_buffer);
+ if (buf_size <= 0 || !output_tdm_buffer)
+ return -EINVAL;
+
+ bytes_in_fifo_per_frame = buf_size/frame_ch_data_size;
+ bytes_slot_offset = bytes_in_fifo_per_frame/adap->adapt_cfg.slot_width;
+
+
+ memset(output_tdm_buffer, 0, sizeof(buf_size));
+
+ list_for_each_entry_safe(port, next, &adap->myports, list) {
+
+ /* check if the port is open */
+ if (!port->in_use)
+ continue;
+
+ list_for_each_entry_safe(channel, temp, &port->mychannels,
+ list) {
+ pr_debug("TX-Tdm %d (slots-)", channel->ch_id);
+
+
+ /* if the channel is open */
+ if (!channel->in_use || !channel->p_ch_data)
+ continue;
+
+ spin_lock(&channel->p_ch_data->tx_channel_lock);
+ if (!channel->in_use || !channel->p_ch_data)
+ continue;
+ ch_bd = channel->p_ch_data->tx_out_data;
+ if (ch_bd->flag) {
+ pcm_buffer = (u16 *)((uint8_t *)ch_bd->p_data +
+ ch_bd->offset);
+ /*if the buffer has less frames than required */
+ if (frame_ch_data_size >=
+ ((ch_bd->length) - (ch_bd->offset/
+ adap->adapt_cfg.slot_width))) {
+ ch_data_len =
+ (ch_bd->length) - (ch_bd->offset/
+ adap->adapt_cfg.slot_width);
+ last_data = 1;
+ } else {
+ ch_data_len = frame_ch_data_size;
+ }
+ /* Interleaving the data */
+ for (i = 0; i < ch_data_len; i++) {
+ /* TODO- need to be genric for any size
+ assignment*/
+ output_tdm_buffer[channel->ch_id +
+ bytes_slot_offset * i] =
+ pcm_buffer[i];
+ }
+ /* If all the data of this buffer is
+ transmitted */
+ if (last_data) {
+ ch_bd->flag = 0;
+ ch_bd->offset = 0;
+ channel->p_ch_data->tx_out_data =
+ ch_bd->wrap ?
+ channel->p_ch_data->tx_data_fifo
+ : ch_bd+1;
+ port->port_stat.tx_pkt_conf_count++;
+ } else {
+ ch_bd->offset += ch_data_len *
+ (adap->adapt_cfg.slot_width);
+ }
+#ifdef TDM_CORE_DEBUG
+ data_flag = 1;
+#endif
+ }
+ spin_unlock(&channel->p_ch_data->tx_channel_lock);
+ }
+ }
+
+#ifdef TDM_CORE_DEBUG
+ if (data_flag) {
+ pr_info("TX-TDM Interleaved Data-\n");
+ for (i = 0; i < 64; i++)
+ pr_info("%x", output_tdm_buffer[i]);
+ pr_info("\n");
+ }
+#endif
+ return TDM_E_OK;
+}
+
+/* Channel Level APIs of TDM Framework */
+int tdm_channel_open(u16 chanid, u16 ch_width, struct tdm_port *port,
+ void **h_channel)
+{
+ struct tdm_channel *channel, *temp;
+ unsigned long flags;
+ struct tdm_ch_data *p_ch_data;
+ int res = TDM_E_OK;
+
+ if (!(port && h_channel)) {
+ pr_err("%s: Invalid handle\n", __func__);
+ return -EINVAL;
+ }
+
+ if (ch_width != 1) {
+ pr_err("%s: Mode not supported\n", __func__);
+ return -EINVAL;
+ }
+
+ list_for_each_entry_safe(channel, temp, &port->mychannels, list) {
+ if (channel->ch_id == chanid) {
+ pr_err("%s: Channel %d already open\n",
+ __func__, chanid);
+ return -EINVAL;
+ }
+ }
+
+ channel = kzalloc(sizeof(*channel), GFP_KERNEL);
+ if (!channel) {
+ res = -ENOMEM;
+ goto out;
+ }
+
+ init_waitqueue_head(&channel->ch_wait_queue);
+ p_ch_data = kzalloc(sizeof(struct tdm_ch_data), GFP_KERNEL);
+ if (!p_ch_data) {
+ res = -ENOMEM;
+ goto outdata;
+ }
+
+ p_ch_data->rx_data_fifo[TDM_CH_RX_BD_RING_SIZE-1].wrap = 1;
+ p_ch_data->tx_data_fifo[TDM_CH_TX_BD_RING_SIZE-1].wrap = 1;
+
+ p_ch_data->rx_in_data = p_ch_data->rx_data_fifo;
+ p_ch_data->rx_out_data = p_ch_data->rx_data_fifo;
+ p_ch_data->tx_in_data = p_ch_data->tx_data_fifo;
+ p_ch_data->tx_out_data = p_ch_data->tx_data_fifo;
+ spin_lock_init(&p_ch_data->rx_channel_lock);
+ spin_lock_init(&p_ch_data->tx_channel_lock);
+
+ channel->p_ch_data = p_ch_data;
+
+ channel->ch_id = chanid;
+ channel->ch_cfg.first_slot = chanid;
+ channel->ch_cfg.num_slots = 1; /* This is 1 for channelized mode and
+ configurable for other modes */
+ channel->port = port;
+ channel->in_use = 1;
+
+ spin_lock_irqsave(&port->ch_list_lock, flags);
+ list_add_tail(&channel->list, &port->mychannels);
+ spin_unlock_irqrestore(&port->ch_list_lock, flags);
+
+ *h_channel = channel;
+
+ return res;
+
+outdata:
+ kfree(channel);
+out:
+ return res;
+}
+EXPORT_SYMBOL(tdm_channel_open);
+
+int tdm_channel_close(u16 chanid, u16 ch_width, struct tdm_port *port,
+ struct tdm_channel *h_channel)
+{
+ struct tdm_channel *channel;
+ unsigned long flags;
+ int res = TDM_E_OK;
+ channel = h_channel;
+
+ if (!(port && channel)) {
+ pr_err("%s: Invalid handle\n", __func__);
+ res = -EINVAL;
+ goto out;
+ }
+
+ if (ch_width != 1) {
+ pr_err("%s: Mode not supported\n", __func__);
+ res = -EINVAL;
+ goto out;
+ }
+
+ spin_lock_irqsave(&port->ch_list_lock, flags);
+ list_del(&channel->list);
+ spin_unlock_irqrestore(&port->ch_list_lock, flags);
+
+out:
+ if (channel)
+ kfree(channel->p_ch_data);
+ kfree(channel);
+ return res;
+}
+EXPORT_SYMBOL(tdm_channel_close);
+
+void init_config_adapter(struct tdm_adapter *adap)
+{
+ struct fsl_tdm_adapt_cfg default_adapt_cfg = {
+ .loopback = e_TDM_PROCESS_NORMAL,
+ .num_ch = NUM_CHANNELS,
+ .ch_size_type = CHANNEL_16BIT_LIN,
+ .frame_len = NUM_SAMPLES_PER_FRAME,
+ .num_frames = NUM_SAMPLES_PER_FRAME,
+ .adap_mode = e_TDM_ADAPTER_MODE_NONE
+ };
+
+ default_adapt_cfg.slot_width = default_adapt_cfg.ch_size_type/3 + 1;
+
+ memcpy(&adap->adapt_cfg, &default_adapt_cfg,
+ sizeof(struct fsl_tdm_adapt_cfg));
+
+ return;
+}
+EXPORT_SYMBOL(init_config_adapter);
+
+static void tdm_data_tasklet_fn(unsigned long data)
+{
+ struct tdm_adapter *adapter;
+ adapter = (struct tdm_adapter *)data;
+ if (adapter != NULL) {
+ tdm_data_tx_interleave(adapter);
+ tdm_data_rx_deinterleave(adapter);
+ }
+}
+
+/*
+ * add_tdm_phy - declare tdm phy, use dynamic device number
+ * @tdm_phy: tdm_phy to be added
+ * Context: can sleep
+ * This routine is used to declare a TDM phy device and add it to the list of
+ * avalable tdm phy devices
+ */
+int add_tdm_phy(struct tdm_phy *tdm_phy)
+{
+ int res = TDM_E_OK;
+ int index;
+ struct tdm_adapter *adap, *next;
+ list_add_tail(&tdm_phy->list, &tdm_phy_list);
+ mutex_lock(&tdm_core_lock);
+ list_for_each_entry_safe(adap, next, &tdm_adapter_list, list) {
+ /* Check if any adapter has our phandle */
+ for (index = 0; index < adap->num_tdm_phy; index++)
+ if (*(int *)tdm_phy->phandle_prop ==
+ *((int *)adap->phandle_prop) + index) {
+ mutex_unlock(&tdm_core_lock);
+ return attach_phy_adapter(adap, tdm_phy, index);
+ }
+ }
+ mutex_unlock(&tdm_core_lock);
+ return res;
+}
+EXPORT_SYMBOL(add_tdm_phy);
+
+int attach_phy_adapter(struct tdm_adapter *adapter,
+ struct tdm_phy *tdm_phy, int phy_id)
+{
+ struct fsl_tdm_adapt_cfg *tdm_config;
+ tdm_phy->tdm_adapter = adapter;
+ adapter->tdm_phy[phy_id] = tdm_phy;
+ /* Get TDM configuration from adapter */
+ tdm_config = &adapter->adapt_cfg;
+ /*
+ * Call config function of tdm phy with adapter configuration so that
+ * it can configure itself based on the configuration passed by adapter
+ */
+ tdm_phy->configure_phy(tdm_config);
+ return 1;
+}
+
+int get_tdm_phy(struct tdm_adapter *adapter, void *req_phy_handle)
+{
+ int index;
+ struct tdm_phy *tdm_phy, *next;
+ list_for_each_entry_safe(tdm_phy, next, &tdm_phy_list, list) {
+ for (index = 0; index < adapter->num_tdm_phy; index++)
+ if (*(int *)tdm_phy->phandle_prop ==
+ *((int *)req_phy_handle + index))
+ return attach_phy_adapter(adapter,
+ tdm_phy, index);
+ }
+ return 0;
+}
+EXPORT_SYMBOL(get_tdm_phy);
+
+MODULE_AUTHOR("Hemant Agrawal <hemant@freescale.com> and "
+ "Rajesh Gumasta <rajesh.gumasta@freescale.com>");
+MODULE_DESCRIPTION("TDM Driver Framework Core");
+MODULE_LICENSE("GPL");
@@ -444,6 +444,17 @@ struct i2c_device_id {
__attribute__((aligned(sizeof(kernel_ulong_t))));
};
+/* tdm */
+
+#define TDM_NAME_SIZE 20
+#define TDM_MODULE_PREFIX "tdm:"
+
+struct tdm_device_id {
+ char name[TDM_NAME_SIZE];
+ kernel_ulong_t driver_data /* Data private to the driver */
+ __attribute__((aligned(sizeof(kernel_ulong_t))));
+};
+
/* spi */
#define SPI_NAME_SIZE 32
new file mode 100644
@@ -0,0 +1,379 @@
+/* include/linux/tdm.h
+ *
+ * Copyright (C) 2012 Freescale Semiconductor, Inc, All rights reserved.
+ *
+ * tdm.h - definitions for the tdm-device framework interface
+ *
+ * Author:Hemant Agrawal <hemant@freescale.com>
+ * Rajesh Gumasta <rajesh.gumasta@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#ifndef _LINUX_TDM_H
+#define _LINUX_TDM_H
+
+#ifdef __KERNEL__
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/device.h> /* for struct device */
+#include <linux/sched.h> /* for completion */
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+
+#define CHANNEL_8BIT_LIN 0 /* 8 bit linear */
+#define CHANNEL_8BIT_ULAW 1 /* 8 bit Mu-law */
+#define CHANNEL_8BIT_ALAW 2 /* 8 bit A-law */
+#define CHANNEL_16BIT_LIN 3 /* 16 bit Linear */
+
+#define NUM_CHANNELS 16
+#define NUM_SAMPLES_PER_MS 8 /* 8 samples per milli sec per
+ channel. Req for voice data */
+#define NUM_MS 10
+#define NUM_SAMPLES_PER_FRAME (NUM_MS * NUM_SAMPLES_PER_MS) /* Number of
+ samples for 1 client buffer */
+#define NUM_OF_TDM_BUF 3
+#define TDM_PHY_NAME_LEN 20
+#define MAX_TDM_PHY 10
+
+/* General options */
+
+struct tdm_adapt_algorithm;
+struct tdm_adapter;
+struct tdm_port;
+struct tdm_driver;
+
+/* Align addr on a size boundary - adjust address up if needed */
+/* returns min value greater than size which is multiple of alignment */
+static inline int ALIGN_SIZE(u64 size, u32 alignment)
+{
+ return (size + alignment - 1) & (~(alignment - 1));
+}
+
+/**
+ * struct tdm_driver - represent an TDM device driver
+ * @class: What kind of tdm device we instantiate (for detect)
+ * @id:Driver id
+ * @name: Name of the driver
+ * @attach_adapter: Callback for device addition (for legacy drivers)
+ * @detach_adapter: Callback for device removal (for legacy drivers)
+ * @probe: Callback for device binding
+ * @remove: Callback for device unbinding
+ * @shutdown: Callback for device shutdown
+ * @suspend: Callback for device suspend
+ * @resume: Callback for device resume
+ * @command: Callback for sending commands to device
+ * @id_table: List of TDM devices supported by this driver
+ * @list: List of drivers created (for tdm-core use only)
+ */
+struct tdm_driver {
+ unsigned int class;
+ unsigned int id;
+ char name[TDM_NAME_SIZE];
+
+ int (*attach_adapter)(struct tdm_adapter *);
+ int (*detach_adapter)(struct tdm_adapter *);
+
+ /* Standard driver model interfaces */
+ int (*probe)(const struct tdm_device_id *);
+ int (*remove)(void);
+
+ /* driver model interfaces that don't relate to enumeration */
+ void (*shutdown)(void);
+ int (*suspend)(pm_message_t mesg);
+ int (*resume)(void);
+
+ /* a ioctl like command that can be used to perform specific functions
+ * with the device.
+ */
+ int (*command)(unsigned int cmd, void *arg);
+
+ const struct tdm_device_id *id_table;
+
+ /* The associated adapter for this driver */
+ struct tdm_adapter *adapter;
+ struct list_head list;
+};
+
+/* tdm per port statistics structure, used for providing and storing tdm port
+ * statistics.
+ */
+struct tdm_port_stats {
+ unsigned int rx_pkt_count; /* Rx frame count per channel */
+ unsigned int rx_pkt_drop_count; /* Rx drop count per channel to
+ clean space for new buffer */
+ unsigned int tx_pkt_count; /* Tx frame count per channel */
+ unsigned int tx_pkt_conf_count; /* Tx frame confirmation count per
+ channel */
+ unsigned int tx_pkt_drop_count; /* Tx drop count per channel due to
+ queue full */
+};
+
+
+/* tdm Buffer Descriptor, used for Creating Interleaved and De-interleaved
+ * FIFOs
+ */
+struct tdm_bd {
+ unsigned char flag; /* BD is full or empty */
+ unsigned char wrap; /* BD is last in the queue */
+ unsigned short length; /* Length of Data in BD */
+ /*TODO: use dyanmic memory */
+ unsigned short p_data[NUM_SAMPLES_PER_FRAME]; /* Data Pointer */
+ unsigned long offset; /* Offset of the Data Pointer to be used */
+};
+
+#define TDM_CH_RX_BD_RING_SIZE 3
+#define TDM_CH_TX_BD_RING_SIZE 3
+
+/* tdm RX-TX Channelised Data */
+struct tdm_port_data {
+ struct tdm_bd rx_data_fifo[TDM_CH_RX_BD_RING_SIZE]; /* Rx Channel Data
+ BD Ring */
+ struct tdm_bd *rx_in_data; /* Current Channel Rx BD to be filled by
+ de-interleave function */
+ struct tdm_bd *rx_out_data; /* Current Channel Rx BD to be
+ read by App */
+ struct tdm_bd tx_data_fifo[TDM_CH_TX_BD_RING_SIZE]; /* Tx Channel Data
+ BD Ring */
+ struct tdm_bd *tx_in_data; /* Current Channel Tx BD to be
+ filled by App */
+ struct tdm_bd *tx_out_data; /* Current Channel Tx BD to be read by
+ interleave function */
+ spinlock_t rx_channel_lock; /* Spin Lock for Rx Channel */
+ spinlock_t tx_channel_lock; /* Spin Lock for Tx Channel */
+};
+
+/* structure tdm_port_cfg - contains configuration params for a port */
+struct tdm_port_cfg {
+ unsigned short port_mode;
+};
+
+/* struct tdm_port - represent an TDM ports for a device */
+struct tdm_port {
+ unsigned short port_id;
+ unsigned short in_use; /* Port is enabled? */
+ uint16_t rx_max_frames; /* Received Port frames
+ before allowing Read Operation in
+ Port Mode */
+
+ struct tdm_port_stats port_stat;/* A structure parameters defining
+ TDM port statistics. */
+ struct tdm_port_data *p_port_data; /* a structure parameters
+ defining tdm channelised data */
+
+ struct tdm_driver *driver; /* driver for this port */
+ struct tdm_adapter *adapter; /* adapter for this port */
+ struct list_head list; /* list of ports */
+ struct list_head mychannels; /* list of channels, created on this
+ port*/
+ spinlock_t ch_list_lock; /* Spin Lock for channel_list */
+ struct tdm_port_cfg port_cfg;/* A structure parameters defining
+ TDM port configuration. */
+};
+
+/* tdm RX-TX Channelised Data */
+struct tdm_ch_data {
+ struct tdm_bd rx_data_fifo[TDM_CH_RX_BD_RING_SIZE]; /* Rx Port Data BD
+ Ring */
+ struct tdm_bd *rx_in_data; /* Current Port Rx BD to be filled by
+ de-interleave function */
+ struct tdm_bd *rx_out_data; /* Current Port Rx BD to be read by App */
+ struct tdm_bd tx_data_fifo[TDM_CH_TX_BD_RING_SIZE]; /* Tx Port Data BD
+ Ring */
+ struct tdm_bd *tx_in_data; /* Current Port Tx BD to be filled by
+ App */
+ struct tdm_bd *tx_out_data; /* Current Port Tx BD to be read by
+ interleave function */
+ spinlock_t rx_channel_lock; /* Spin Lock for Rx Port */
+ spinlock_t tx_channel_lock; /* Spin Lock for Tx Port */
+};
+
+/* Channel config params */
+struct tdm_ch_cfg {
+ unsigned short num_slots;
+ unsigned short first_slot;
+};
+
+/* struct tdm_channel- represent a TDM channel for a port */
+struct tdm_channel {
+ u16 ch_id; /* logical channel number */
+ struct list_head list; /* list of channels in a port*/
+ struct tdm_port *port; /* port for this channel */
+ u16 in_use; /* channel is enabled? */
+ struct tdm_ch_cfg ch_cfg; /* channel configuration */
+ struct tdm_ch_data *p_ch_data; /* data storage space for channel */
+ wait_queue_head_t ch_wait_queue;/* waitQueue for RX Channel Data */
+};
+
+/* tdm_adapt_algorithm is for accessing the routines of device */
+struct tdm_adapt_algorithm {
+ u32 (*tdm_read)(struct tdm_adapter *, u16 **);
+ u32 (*tdm_get_write_buf)(struct tdm_adapter *, u16 **);
+ u32 (*tdm_write)(struct tdm_adapter *, void * , unsigned int len);
+ int (*tdm_enable)(struct tdm_adapter *);
+ int (*tdm_disable)(struct tdm_adapter *);
+};
+
+/* tdm_adapter_mode is to define in mode of the device */
+enum tdm_adapter_mode {
+ e_TDM_ADAPTER_MODE_NONE = 0x00,
+ e_TDM_ADAPTER_MODE_T1 = 0x01,
+ e_TDM_ADAPTER_MODE_E1 = 0x02,
+ e_TDM_ADAPTER_MODE_T1_RAW = 0x10,
+ e_TDM_ADAPTER_MODE_E1_RAW = 0x20,
+};
+
+/* tdm_port_mode defines the mode in which the port is configured to operate
+ * It can be channelized/full/fractional.
+ */
+enum tdm_port_mode {
+ e_TDM_PORT_CHANNELIZED = 0 /* Channelized mode */
+ , e_TDM_PORT_FULL = 1 /* Full mode */
+ , e_TDM_PORT_FRACTIONAL = 2 /* Fractional mode */
+};
+
+/* tdm_process_mode used for testing the tdm device in normal mode or internal
+ * loopback or external loopback
+ */
+enum tdm_process_mode {
+ e_TDM_PROCESS_NORMAL = 0 /* Normal mode */
+ , e_TDM_PROCESS_INT_LPB = 1 /* Internal loop mode */
+ , e_TDM_PROCESS_EXT_LPB = 2 /* External Loopback mode */
+};
+
+
+/* TDM configuration parameters */
+struct fsl_tdm_adapt_cfg {
+ u8 num_ch; /* Number of channels in this adpater */
+ u8 ch_size_type; /* reciever/transmit channel
+ size for all channels */
+ u8 slot_width; /* 1 or 2 Is defined by channel type */
+ u8 frame_len; /* Length of frame in samples */
+ u32 num_frames;
+ u8 loopback; /* loopback or normal */
+ u8 adap_mode; /* 0=None, 1= T1, 2= T1-FULL, 3=E1,
+ 4 = E1-FULL */
+ int max_num_ports; /* Not Used: Max Number of ports that
+ can be created on this adapter */
+ int max_timeslots; /* Max Number of timeslots that are
+ supported on this adapter */
+ int tdm_tx_clk; /* Value of tdm transmit clk */
+ int tdm_rx_clk; /* Value of tdm receive clk */
+};
+
+/*
+ * tdm_adapter is the structure used to identify a physical tdm device along
+ * with the access algorithms necessary to access it.
+ */
+struct tdm_adapter {
+ struct module *owner; /* owner of the adapter module */
+ unsigned int id; /* Adapter Id */
+ unsigned int class; /* classes to allow probing for */
+ unsigned int drv_count; /* Number of drivers associated with the
+ adapter */
+
+ const struct tdm_adapt_algorithm *algo; /* the algorithm to access the
+ adapter*/
+
+ char name[TDM_NAME_SIZE]; /* Name of Adapter */
+ struct mutex adap_lock;
+ struct device *parent; /*Not Used*/
+
+ struct tasklet_struct tdm_data_tasklet; /* tasklet handle to perform
+ data processing*/
+ int tasklet_conf; /* flag for tasklet configuration */
+ int tdm_rx_flag;
+
+ struct list_head myports; /* list of ports, created on this
+ adapter */
+ struct list_head list;
+ spinlock_t portlist_lock; /* Spin Lock for port_list */
+ void *data;
+ struct fsl_tdm_adapt_cfg adapt_cfg;
+ int num_tdm_phy; /* Number of tdm phys available */
+ struct tdm_phy *tdm_phy[MAX_TDM_PHY]; /* Stores tdm phys */
+ void *phandle_prop; /* Pointer to phandle property */
+};
+
+/*
+ * tdm_phy is the structure used to identify a physiscal line control device
+ * and callbacks required to configure it.
+ */
+struct tdm_phy {
+ char name[TDM_PHY_NAME_LEN];
+ struct device_node *np;
+ int (*configure_phy)(struct fsl_tdm_adapt_cfg *);
+ struct tdm_adapter *tdm_adapter; /* Will point to tdm adpater to which
+ this phy is conected */
+ struct list_head list;
+ void *phandle_prop; /* Pointer to phandle property */
+};
+
+struct tdm_phy_priv {
+ struct device *device;
+ unsigned int type; /* Type of tdm_phy: can be SLIC/E1/T1 */
+ struct tdm_phy phy;
+};
+
+
+static inline void *tdm_get_adapdata(const struct tdm_adapter *dev)
+{
+ return dev->data;
+}
+
+static inline void tdm_set_adapdata(struct tdm_adapter *dev, void *data)
+{
+ dev->data = data;
+}
+
+/* functions exported by tdm.o */
+
+extern int tdm_add_adapter(struct tdm_adapter *);
+extern int tdm_del_adapter(struct tdm_adapter *);
+extern int tdm_register_driver(struct tdm_driver *);
+extern void tdm_del_driver(struct tdm_driver *);
+extern void tdm_unregister_driver(struct tdm_driver *);
+extern void init_config_adapter(struct tdm_adapter *);
+
+extern unsigned int tdm_port_open(struct tdm_driver *, void **);
+extern unsigned int tdm_port_close(void *);
+extern unsigned int tdm_port_ioctl(void *, unsigned int, unsigned long);
+extern unsigned int tdm_channel_read(void *, void *, void *, u16 *);
+extern unsigned int tdm_channel_write(void *, void * , void *, u16);
+extern unsigned int tdm_ch_poll(void *, unsigned int);
+
+extern int tdm_channel_open(u16, u16, struct tdm_port *, void **);
+extern int tdm_channel_close(u16, u16, struct tdm_port *,
+ struct tdm_channel *);
+extern int add_tdm_phy(struct tdm_phy *);
+extern int attach_phy_adapter(struct tdm_adapter *,
+ struct tdm_phy *, int phy_id);
+extern int get_tdm_phy(struct tdm_adapter *, void *);
+
+static inline int tdm_add_driver(struct tdm_driver *driver)
+{
+ return tdm_register_driver(driver);
+}
+
+extern struct tdm_adapter *tdm_get_adapter(int id);
+extern void tdm_put_adapter(struct tdm_adapter *adap);
+
+#endif /* __KERNEL__ */
+
+#define TDM_E_OK 0
+
+#endif /* _LINUX_TDM_H */