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authorLinus Torvalds <torvalds@linux-foundation.org>2012-04-02 09:50:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-02 09:50:40 -0700
commitb1a808ff436343956a6ae63178ea1810c5e5a3a1 (patch)
treebd510d5ea6b407df6ea0b8353e1788e12f95e427 /include
parent97754175042e77d02c4232d5fb24c16abd1c77f1 (diff)
parent43139a61fc68f4b0af7327a0e63f340a7c81c69a (diff)
Merge branch 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi
Pull HSI (High Speed Synchronous Serial Interface) framework from Carlos Chinea: "The High Speed Synchronous Serial Interface (HSI) is a serial interface mainly used for connecting application engines (APE) with cellular modem engines (CMT) in cellular handsets. The framework is currently being used for some people and we would like to see it integrated into the kernel for 3.3. There is no HW controller drivers in this pull, but some people have already some of them pending which they would like to push as soon as this integrated. I am also working on the acceptance for an TI OMAP one, based on a compatible legacy version of the interface called SSI." Ok, so it didn't get into 3.3, but here it is pulled into 3.4. Several people piped up to say "yeah, we want this". * 'for-next' of git://gitorious.org/kernel-hsi/kernel-hsi: HSI: hsi_char: Update ioctl-number.txt HSI: Add HSI API documentation HSI: hsi_char: Add HSI char device kernel configuration HSI: hsi_char: Add HSI char device driver HSI: hsi: Introducing HSI framework
Diffstat (limited to 'include')
-rw-r--r--include/linux/Kbuild1
-rw-r--r--include/linux/hsi/Kbuild1
-rw-r--r--include/linux/hsi/hsi.h410
-rw-r--r--include/linux/hsi/hsi_char.h63
4 files changed, 475 insertions, 0 deletions
diff --git a/include/linux/Kbuild b/include/linux/Kbuild
index d05df2810354..3c9b616c834a 100644
--- a/include/linux/Kbuild
+++ b/include/linux/Kbuild
@@ -3,6 +3,7 @@ header-y += can/
header-y += caif/
header-y += dvb/
header-y += hdlc/
+header-y += hsi/
header-y += isdn/
header-y += mmc/
header-y += nfsd/
diff --git a/include/linux/hsi/Kbuild b/include/linux/hsi/Kbuild
new file mode 100644
index 000000000000..271a770b4784
--- /dev/null
+++ b/include/linux/hsi/Kbuild
@@ -0,0 +1 @@
+header-y += hsi_char.h
diff --git a/include/linux/hsi/hsi.h b/include/linux/hsi/hsi.h
new file mode 100644
index 000000000000..4b178067f405
--- /dev/null
+++ b/include/linux/hsi/hsi.h
@@ -0,0 +1,410 @@
+/*
+ * HSI core header file.
+ *
+ * Copyright (C) 2010 Nokia Corporation. All rights reserved.
+ *
+ * Contact: Carlos Chinea <carlos.chinea@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef __LINUX_HSI_H__
+#define __LINUX_HSI_H__
+
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/scatterlist.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/module.h>
+
+/* HSI message ttype */
+#define HSI_MSG_READ 0
+#define HSI_MSG_WRITE 1
+
+/* HSI configuration values */
+enum {
+ HSI_MODE_STREAM = 1,
+ HSI_MODE_FRAME,
+};
+
+enum {
+ HSI_FLOW_SYNC, /* Synchronized flow */
+ HSI_FLOW_PIPE, /* Pipelined flow */
+};
+
+enum {
+ HSI_ARB_RR, /* Round-robin arbitration */
+ HSI_ARB_PRIO, /* Channel priority arbitration */
+};
+
+#define HSI_MAX_CHANNELS 16
+
+/* HSI message status codes */
+enum {
+ HSI_STATUS_COMPLETED, /* Message transfer is completed */
+ HSI_STATUS_PENDING, /* Message pending to be read/write (POLL) */
+ HSI_STATUS_PROCEEDING, /* Message transfer is ongoing */
+ HSI_STATUS_QUEUED, /* Message waiting to be served */
+ HSI_STATUS_ERROR, /* Error when message transfer was ongoing */
+};
+
+/* HSI port event codes */
+enum {
+ HSI_EVENT_START_RX,
+ HSI_EVENT_STOP_RX,
+};
+
+/**
+ * struct hsi_config - Configuration for RX/TX HSI modules
+ * @mode: Bit transmission mode (STREAM or FRAME)
+ * @channels: Number of channels to use [1..16]
+ * @speed: Max bit transmission speed (Kbit/s)
+ * @flow: RX flow type (SYNCHRONIZED or PIPELINE)
+ * @arb_mode: Arbitration mode for TX frame (Round robin, priority)
+ */
+struct hsi_config {
+ unsigned int mode;
+ unsigned int channels;
+ unsigned int speed;
+ union {
+ unsigned int flow; /* RX only */
+ unsigned int arb_mode; /* TX only */
+ };
+};
+
+/**
+ * struct hsi_board_info - HSI client board info
+ * @name: Name for the HSI device
+ * @hsi_id: HSI controller id where the client sits
+ * @port: Port number in the controller where the client sits
+ * @tx_cfg: HSI TX configuration
+ * @rx_cfg: HSI RX configuration
+ * @platform_data: Platform related data
+ * @archdata: Architecture-dependent device data
+ */
+struct hsi_board_info {
+ const char *name;
+ unsigned int hsi_id;
+ unsigned int port;
+ struct hsi_config tx_cfg;
+ struct hsi_config rx_cfg;
+ void *platform_data;
+ struct dev_archdata *archdata;
+};
+
+#ifdef CONFIG_HSI_BOARDINFO
+extern int hsi_register_board_info(struct hsi_board_info const *info,
+ unsigned int len);
+#else
+static inline int hsi_register_board_info(struct hsi_board_info const *info,
+ unsigned int len)
+{
+ return 0;
+}
+#endif /* CONFIG_HSI_BOARDINFO */
+
+/**
+ * struct hsi_client - HSI client attached to an HSI port
+ * @device: Driver model representation of the device
+ * @tx_cfg: HSI TX configuration
+ * @rx_cfg: HSI RX configuration
+ * @hsi_start_rx: Called after incoming wake line goes high
+ * @hsi_stop_rx: Called after incoming wake line goes low
+ */
+struct hsi_client {
+ struct device device;
+ struct hsi_config tx_cfg;
+ struct hsi_config rx_cfg;
+ void (*hsi_start_rx)(struct hsi_client *cl);
+ void (*hsi_stop_rx)(struct hsi_client *cl);
+ /* private: */
+ unsigned int pclaimed:1;
+ struct list_head link;
+};
+
+#define to_hsi_client(dev) container_of(dev, struct hsi_client, device)
+
+static inline void hsi_client_set_drvdata(struct hsi_client *cl, void *data)
+{
+ dev_set_drvdata(&cl->device, data);
+}
+
+static inline void *hsi_client_drvdata(struct hsi_client *cl)
+{
+ return dev_get_drvdata(&cl->device);
+}
+
+/**
+ * struct hsi_client_driver - Driver associated to an HSI client
+ * @driver: Driver model representation of the driver
+ */
+struct hsi_client_driver {
+ struct device_driver driver;
+};
+
+#define to_hsi_client_driver(drv) container_of(drv, struct hsi_client_driver,\
+ driver)
+
+int hsi_register_client_driver(struct hsi_client_driver *drv);
+
+static inline void hsi_unregister_client_driver(struct hsi_client_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+
+/**
+ * struct hsi_msg - HSI message descriptor
+ * @link: Free to use by the current descriptor owner
+ * @cl: HSI device client that issues the transfer
+ * @sgt: Head of the scatterlist array
+ * @context: Client context data associated to the transfer
+ * @complete: Transfer completion callback
+ * @destructor: Destructor to free resources when flushing
+ * @status: Status of the transfer when completed
+ * @actual_len: Actual length of data transfered on completion
+ * @channel: Channel were to TX/RX the message
+ * @ttype: Transfer type (TX if set, RX otherwise)
+ * @break_frame: if true HSI will send/receive a break frame. Data buffers are
+ * ignored in the request.
+ */
+struct hsi_msg {
+ struct list_head link;
+ struct hsi_client *cl;
+ struct sg_table sgt;
+ void *context;
+
+ void (*complete)(struct hsi_msg *msg);
+ void (*destructor)(struct hsi_msg *msg);
+
+ int status;
+ unsigned int actual_len;
+ unsigned int channel;
+ unsigned int ttype:1;
+ unsigned int break_frame:1;
+};
+
+struct hsi_msg *hsi_alloc_msg(unsigned int n_frag, gfp_t flags);
+void hsi_free_msg(struct hsi_msg *msg);
+
+/**
+ * struct hsi_port - HSI port device
+ * @device: Driver model representation of the device
+ * @tx_cfg: Current TX path configuration
+ * @rx_cfg: Current RX path configuration
+ * @num: Port number
+ * @shared: Set when port can be shared by different clients
+ * @claimed: Reference count of clients which claimed the port
+ * @lock: Serialize port claim
+ * @async: Asynchronous transfer callback
+ * @setup: Callback to set the HSI client configuration
+ * @flush: Callback to clean the HW state and destroy all pending transfers
+ * @start_tx: Callback to inform that a client wants to TX data
+ * @stop_tx: Callback to inform that a client no longer wishes to TX data
+ * @release: Callback to inform that a client no longer uses the port
+ * @clients: List of hsi_clients using the port.
+ * @clock: Lock to serialize access to the clients list.
+ */
+struct hsi_port {
+ struct device device;
+ struct hsi_config tx_cfg;
+ struct hsi_config rx_cfg;
+ unsigned int num;
+ unsigned int shared:1;
+ int claimed;
+ struct mutex lock;
+ int (*async)(struct hsi_msg *msg);
+ int (*setup)(struct hsi_client *cl);
+ int (*flush)(struct hsi_client *cl);
+ int (*start_tx)(struct hsi_client *cl);
+ int (*stop_tx)(struct hsi_client *cl);
+ int (*release)(struct hsi_client *cl);
+ struct list_head clients;
+ spinlock_t clock;
+};
+
+#define to_hsi_port(dev) container_of(dev, struct hsi_port, device)
+#define hsi_get_port(cl) to_hsi_port((cl)->device.parent)
+
+void hsi_event(struct hsi_port *port, unsigned int event);
+int hsi_claim_port(struct hsi_client *cl, unsigned int share);
+void hsi_release_port(struct hsi_client *cl);
+
+static inline int hsi_port_claimed(struct hsi_client *cl)
+{
+ return cl->pclaimed;
+}
+
+static inline void hsi_port_set_drvdata(struct hsi_port *port, void *data)
+{
+ dev_set_drvdata(&port->device, data);
+}
+
+static inline void *hsi_port_drvdata(struct hsi_port *port)
+{
+ return dev_get_drvdata(&port->device);
+}
+
+/**
+ * struct hsi_controller - HSI controller device
+ * @device: Driver model representation of the device
+ * @owner: Pointer to the module owning the controller
+ * @id: HSI controller ID
+ * @num_ports: Number of ports in the HSI controller
+ * @port: Array of HSI ports
+ */
+struct hsi_controller {
+ struct device device;
+ struct module *owner;
+ unsigned int id;
+ unsigned int num_ports;
+ struct hsi_port *port;
+};
+
+#define to_hsi_controller(dev) container_of(dev, struct hsi_controller, device)
+
+struct hsi_controller *hsi_alloc_controller(unsigned int n_ports, gfp_t flags);
+void hsi_free_controller(struct hsi_controller *hsi);
+int hsi_register_controller(struct hsi_controller *hsi);
+void hsi_unregister_controller(struct hsi_controller *hsi);
+
+static inline void hsi_controller_set_drvdata(struct hsi_controller *hsi,
+ void *data)
+{
+ dev_set_drvdata(&hsi->device, data);
+}
+
+static inline void *hsi_controller_drvdata(struct hsi_controller *hsi)
+{
+ return dev_get_drvdata(&hsi->device);
+}
+
+static inline struct hsi_port *hsi_find_port_num(struct hsi_controller *hsi,
+ unsigned int num)
+{
+ return (num < hsi->num_ports) ? &hsi->port[num] : NULL;
+}
+
+/*
+ * API for HSI clients
+ */
+int hsi_async(struct hsi_client *cl, struct hsi_msg *msg);
+
+/**
+ * hsi_id - Get HSI controller ID associated to a client
+ * @cl: Pointer to a HSI client
+ *
+ * Return the controller id where the client is attached to
+ */
+static inline unsigned int hsi_id(struct hsi_client *cl)
+{
+ return to_hsi_controller(cl->device.parent->parent)->id;
+}
+
+/**
+ * hsi_port_id - Gets the port number a client is attached to
+ * @cl: Pointer to HSI client
+ *
+ * Return the port number associated to the client
+ */
+static inline unsigned int hsi_port_id(struct hsi_client *cl)
+{
+ return to_hsi_port(cl->device.parent)->num;
+}
+
+/**
+ * hsi_setup - Configure the client's port
+ * @cl: Pointer to the HSI client
+ *
+ * When sharing ports, clients should either relay on a single
+ * client setup or have the same setup for all of them.
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_setup(struct hsi_client *cl)
+{
+ if (!hsi_port_claimed(cl))
+ return -EACCES;
+ return hsi_get_port(cl)->setup(cl);
+}
+
+/**
+ * hsi_flush - Flush all pending transactions on the client's port
+ * @cl: Pointer to the HSI client
+ *
+ * This function will destroy all pending hsi_msg in the port and reset
+ * the HW port so it is ready to receive and transmit from a clean state.
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_flush(struct hsi_client *cl)
+{
+ if (!hsi_port_claimed(cl))
+ return -EACCES;
+ return hsi_get_port(cl)->flush(cl);
+}
+
+/**
+ * hsi_async_read - Submit a read transfer
+ * @cl: Pointer to the HSI client
+ * @msg: HSI message descriptor of the transfer
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_async_read(struct hsi_client *cl, struct hsi_msg *msg)
+{
+ msg->ttype = HSI_MSG_READ;
+ return hsi_async(cl, msg);
+}
+
+/**
+ * hsi_async_write - Submit a write transfer
+ * @cl: Pointer to the HSI client
+ * @msg: HSI message descriptor of the transfer
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_async_write(struct hsi_client *cl, struct hsi_msg *msg)
+{
+ msg->ttype = HSI_MSG_WRITE;
+ return hsi_async(cl, msg);
+}
+
+/**
+ * hsi_start_tx - Signal the port that the client wants to start a TX
+ * @cl: Pointer to the HSI client
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_start_tx(struct hsi_client *cl)
+{
+ if (!hsi_port_claimed(cl))
+ return -EACCES;
+ return hsi_get_port(cl)->start_tx(cl);
+}
+
+/**
+ * hsi_stop_tx - Signal the port that the client no longer wants to transmit
+ * @cl: Pointer to the HSI client
+ *
+ * Return -errno on failure, 0 on success
+ */
+static inline int hsi_stop_tx(struct hsi_client *cl)
+{
+ if (!hsi_port_claimed(cl))
+ return -EACCES;
+ return hsi_get_port(cl)->stop_tx(cl);
+}
+#endif /* __LINUX_HSI_H__ */
diff --git a/include/linux/hsi/hsi_char.h b/include/linux/hsi/hsi_char.h
new file mode 100644
index 000000000000..76160b4f455d
--- /dev/null
+++ b/include/linux/hsi/hsi_char.h
@@ -0,0 +1,63 @@
+/*
+ * Part of the HSI character device driver.
+ *
+ * Copyright (C) 2010 Nokia Corporation. All rights reserved.
+ *
+ * Contact: Andras Domokos <andras.domokos at nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+
+#ifndef __HSI_CHAR_H
+#define __HSI_CHAR_H
+
+#define HSI_CHAR_MAGIC 'k'
+#define HSC_IOW(num, dtype) _IOW(HSI_CHAR_MAGIC, num, dtype)
+#define HSC_IOR(num, dtype) _IOR(HSI_CHAR_MAGIC, num, dtype)
+#define HSC_IOWR(num, dtype) _IOWR(HSI_CHAR_MAGIC, num, dtype)
+#define HSC_IO(num) _IO(HSI_CHAR_MAGIC, num)
+
+#define HSC_RESET HSC_IO(16)
+#define HSC_SET_PM HSC_IO(17)
+#define HSC_SEND_BREAK HSC_IO(18)
+#define HSC_SET_RX HSC_IOW(19, struct hsc_rx_config)
+#define HSC_GET_RX HSC_IOW(20, struct hsc_rx_config)
+#define HSC_SET_TX HSC_IOW(21, struct hsc_tx_config)
+#define HSC_GET_TX HSC_IOW(22, struct hsc_tx_config)
+
+#define HSC_PM_DISABLE 0
+#define HSC_PM_ENABLE 1
+
+#define HSC_MODE_STREAM 1
+#define HSC_MODE_FRAME 2
+#define HSC_FLOW_SYNC 0
+#define HSC_ARB_RR 0
+#define HSC_ARB_PRIO 1
+
+struct hsc_rx_config {
+ uint32_t mode;
+ uint32_t flow;
+ uint32_t channels;
+};
+
+struct hsc_tx_config {
+ uint32_t mode;
+ uint32_t channels;
+ uint32_t speed;
+ uint32_t arb_mode;
+};
+
+#endif /* __HSI_CHAR_H */

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