Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 423 insertions, 0 deletions

diff --git a/include/linux/ti_wilink_st.h b/include/linux/ti_wilink_st.h
new file mode 100644
index 000000000000..b004e557caa9
--- /dev/null
+++ b/include/linux/ti_wilink_st.h
@@ -0,0 +1,423 @@
+/*
+ *  Shared Transport Header file
+ *      To be included by the protocol stack drivers for
+ *      Texas Instruments BT,FM and GPS combo chip drivers
+ *      and also serves the sub-modules of the shared transport driver.
+ *
+ *  Copyright (C) 2009-2010 Texas Instruments
+ *  Author: Pavan Savoy <pavan_savoy@ti.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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#ifndef TI_WILINK_ST_H
+#define TI_WILINK_ST_H
+
+/**
+ * enum proto-type - The protocol on WiLink chips which share a
+ *      common physical interface like UART.
+ */
+enum proto_type {
+        ST_BT,
+        ST_FM,
+        ST_GPS,
+        ST_MAX_CHANNELS = 16,
+};
+
+/**
+ * struct st_proto_s - Per Protocol structure from BT/FM/GPS to ST
+ * @type: type of the protocol being registered among the
+ *      available proto_type(BT, FM, GPS the protocol which share TTY).
+ * @recv: the receiver callback pointing to a function in the
+ *      protocol drivers called by the ST driver upon receiving
+ *      relevant data.
+ * @match_packet: reserved for future use, to make ST more generic
+ * @reg_complete_cb: callback handler pointing to a function in protocol
+ *      handler called by ST when the pending registrations are complete.
+ *      The registrations are marked pending, in situations when fw
+ *      download is in progress.
+ * @write: pointer to function in ST provided to protocol drivers from ST,
+ *      to be made use when protocol drivers have data to send to TTY.
+ * @priv_data: privdate data holder for the protocol drivers, sent
+ *      from the protocol drivers during registration, and sent back on
+ *      reg_complete_cb and recv.
+ * @chnl_id: channel id the protocol driver is interested in, the channel
+ *      id is nothing but the 1st byte of the packet in UART frame.
+ * @max_frame_size: size of the largest frame the protocol can receive.
+ * @hdr_len: length of the header structure of the protocol.
+ * @offset_len_in_hdr: this provides the offset of the length field in the
+ *      header structure of the protocol header, to assist ST to know
+ *      how much to receive, if the data is split across UART frames.
+ * @len_size: whether the length field inside the header is 2 bytes
+ *      or 1 byte.
+ * @reserve: the number of bytes ST needs to reserve in the skb being
+ *      prepared for the protocol driver.
+ */
+struct st_proto_s {
+        enum proto_type type;
+        long (*recv) (void *, struct sk_buff *);
+        unsigned char (*match_packet) (const unsigned char *data);
+        void (*reg_complete_cb) (void *, char data);
+        long (*write) (struct sk_buff *skb);
+        void *priv_data;
+
+        unsigned char chnl_id;
+        unsigned short max_frame_size;
+        unsigned char hdr_len;
+        unsigned char offset_len_in_hdr;
+        unsigned char len_size;
+        unsigned char reserve;
+};
+
+extern long st_register(struct st_proto_s *);
+extern long st_unregister(struct st_proto_s *);
+
+
+/*
+ * header information used by st_core.c
+ */
+
+/* states of protocol list */
+#define ST_NOTEMPTY     1
+#define ST_EMPTY        0
+
+/*
+ * possible st_states
+ */
+#define ST_INITIALIZING         1
+#define ST_REG_IN_PROGRESS      2
+#define ST_REG_PENDING          3
+#define ST_WAITING_FOR_RESP     4
+
+/**
+ * struct st_data_s - ST core internal structure
+ * @st_state: different states of ST like initializing, registration
+ *      in progress, this is mainly used to return relevant err codes
+ *      when protocol drivers are registering. It is also used to track
+ *      the recv function, as in during fw download only HCI events
+ *      can occur , where as during other times other events CH8, CH9
+ *      can occur.
+ * @tty: tty provided by the TTY core for line disciplines.
+ * @tx_skb: If for some reason the tty's write returns lesser bytes written
+ *      then to maintain the rest of data to be written on next instance.
+ *      This needs to be protected, hence the lock inside wakeup func.
+ * @tx_state: if the data is being written onto the TTY and protocol driver
+ *      wants to send more, queue up data and mark that there is
+ *      more data to send.
+ * @list: the list of protocols registered, only MAX can exist, one protocol
+ *      can register only once.
+ * @rx_state: states to be maintained inside st's tty receive
+ * @rx_count: count to be maintained inside st's tty receieve
+ * @rx_skb: the skb where all data for a protocol gets accumulated,
+ *      since tty might not call receive when a complete event packet
+ *      is received, the states, count and the skb needs to be maintained.
+ * @rx_chnl: the channel ID for which the data is getting accumalated for.
+ * @txq: the list of skbs which needs to be sent onto the TTY.
+ * @tx_waitq: if the chip is not in AWAKE state, the skbs needs to be queued
+ *      up in here, PM(WAKEUP_IND) data needs to be sent and then the skbs
+ *      from waitq can be moved onto the txq.
+ *      Needs locking too.
+ * @lock: the lock to protect skbs, queues, and ST states.
+ * @protos_registered: count of the protocols registered, also when 0 the
+ *      chip enable gpio can be toggled, and when it changes to 1 the fw
+ *      needs to be downloaded to initialize chip side ST.
+ * @ll_state: the various PM states the chip can be, the states are notified
+ *      to us, when the chip sends relevant PM packets(SLEEP_IND, WAKE_IND).
+ * @kim_data: reference to the parent encapsulating structure.
+ *
+ */
+struct st_data_s {
+        unsigned long st_state;
+        struct sk_buff *tx_skb;
+#define ST_TX_SENDING   1
+#define ST_TX_WAKEUP    2
+        unsigned long tx_state;
+        struct st_proto_s *list[ST_MAX_CHANNELS];
+        bool is_registered[ST_MAX_CHANNELS];
+        unsigned long rx_state;
+        unsigned long rx_count;
+        struct sk_buff *rx_skb;
+        unsigned char rx_chnl;
+        struct sk_buff_head txq, tx_waitq;
+        spinlock_t lock;
+        unsigned char   protos_registered;
+        unsigned long ll_state;
+        void *kim_data;
+        struct tty_struct *tty;
+};
+
+/*
+ * wrapper around tty->ops->write_room to check
+ * availability during firmware download
+ */
+int st_get_uart_wr_room(struct st_data_s *st_gdata);
+/**
+ * st_int_write -
+ * point this to tty->driver->write or tty->ops->write
+ * depending upon the kernel version
+ */
+int st_int_write(struct st_data_s*, const unsigned char*, int);
+
+/**
+ * st_write -
+ * internal write function, passed onto protocol drivers
+ * via the write function ptr of protocol struct
+ */
+long st_write(struct sk_buff *);
+
+/* function to be called from ST-LL */
+void st_ll_send_frame(enum proto_type, struct sk_buff *);
+
+/* internal wake up function */
+void st_tx_wakeup(struct st_data_s *st_data);
+
+/* init, exit entry funcs called from KIM */
+int st_core_init(struct st_data_s **);
+void st_core_exit(struct st_data_s *);
+
+/* ask for reference from KIM */
+void st_kim_ref(struct st_data_s **, int);
+
+#define GPS_STUB_TEST
+#ifdef GPS_STUB_TEST
+int gps_chrdrv_stub_write(const unsigned char*, int);
+void gps_chrdrv_stub_init(void);
+#endif
+
+/*
+ * header information used by st_kim.c
+ */
+
+/* time in msec to wait for
+ * line discipline to be installed
+ */
+#define LDISC_TIME      1000
+#define CMD_RESP_TIME   800
+#define CMD_WR_TIME     5000
+#define MAKEWORD(a, b)  ((unsigned short)(((unsigned char)(a)) \
+        | ((unsigned short)((unsigned char)(b))) << 8))
+
+#define GPIO_HIGH 1
+#define GPIO_LOW  0
+
+/* the Power-On-Reset logic, requires to attempt
+ * to download firmware onto chip more than once
+ * since the self-test for chip takes a while
+ */
+#define POR_RETRY_COUNT 5
+
+/**
+ * struct chip_version - save the chip version
+ */
+struct chip_version {
+        unsigned short full;
+        unsigned short chip;
+        unsigned short min_ver;
+        unsigned short maj_ver;
+};
+
+#define UART_DEV_NAME_LEN 32
+/**
+ * struct kim_data_s - the KIM internal data, embedded as the
+ *      platform's drv data. One for each ST device in the system.
+ * @uim_pid: KIM needs to communicate with UIM to request to install
+ *      the ldisc by opening UART when protocol drivers register.
+ * @kim_pdev: the platform device added in one of the board-XX.c file
+ *      in arch/XX/ directory, 1 for each ST device.
+ * @kim_rcvd: completion handler to notify when data was received,
+ *      mainly used during fw download, which involves multiple send/wait
+ *      for each of the HCI-VS commands.
+ * @ldisc_installed: completion handler to notify that the UIM accepted
+ *      the request to install ldisc, notify from tty_open which suggests
+ *      the ldisc was properly installed.
+ * @resp_buffer: data buffer for the .bts fw file name.
+ * @fw_entry: firmware class struct to request/release the fw.
+ * @rx_state: the rx state for kim's receive func during fw download.
+ * @rx_count: the rx count for the kim's receive func during fw download.
+ * @rx_skb: all of fw data might not come at once, and hence data storage for
+ *      whole of the fw response, only HCI_EVENTs and hence diff from ST's
+ *      response.
+ * @core_data: ST core's data, which mainly is the tty's disc_data
+ * @version: chip version available via a sysfs entry.
+ *
+ */
+struct kim_data_s {
+        long uim_pid;
+        struct platform_device *kim_pdev;
+        struct completion kim_rcvd, ldisc_installed;
+        char resp_buffer[30];
+        const struct firmware *fw_entry;
+        long nshutdown;
+        unsigned long rx_state;
+        unsigned long rx_count;
+        struct sk_buff *rx_skb;
+        struct st_data_s *core_data;
+        struct chip_version version;
+        unsigned char ldisc_install;
+        unsigned char dev_name[UART_DEV_NAME_LEN];
+        unsigned char flow_cntrl;
+        unsigned long baud_rate;
+};
+
+/**
+ * functions called when 1 of the protocol drivers gets
+ * registered, these need to communicate with UIM to request
+ * ldisc installed, read chip_version, download relevant fw
+ */
+long st_kim_start(void *);
+long st_kim_stop(void *);
+
+void st_kim_recv(void *, const unsigned char *, long count);
+void st_kim_complete(void *);
+void kim_st_list_protocols(struct st_data_s *, void *);
+
+/*
+ * BTS headers
+ */
+#define ACTION_SEND_COMMAND     1
+#define ACTION_WAIT_EVENT       2
+#define ACTION_SERIAL           3
+#define ACTION_DELAY            4
+#define ACTION_RUN_SCRIPT       5
+#define ACTION_REMARKS          6
+
+/**
+ * struct bts_header - the fw file is NOT binary which can
+ *      be sent onto TTY as is. The .bts is more a script
+ *      file which has different types of actions.
+ *      Each such action needs to be parsed by the KIM and
+ *      relevant procedure to be called.
+ */
+struct bts_header {
+        u32 magic;
+        u32 version;
+        u8 future[24];
+        u8 actions[0];
+} __attribute__ ((packed));
+
+/**
+ * struct bts_action - Each .bts action has its own type of
+ *      data.
+ */
+struct bts_action {
+        u16 type;
+        u16 size;
+        u8 data[0];
+} __attribute__ ((packed));
+
+struct bts_action_send {
+        u8 data[0];
+} __attribute__ ((packed));
+
+struct bts_action_wait {
+        u32 msec;
+        u32 size;
+        u8 data[0];
+} __attribute__ ((packed));
+
+struct bts_action_delay {
+        u32 msec;
+} __attribute__ ((packed));
+
+struct bts_action_serial {
+        u32 baud;
+        u32 flow_control;
+} __attribute__ ((packed));
+
+/**
+ * struct hci_command - the HCI-VS for intrepreting
+ *      the change baud rate of host-side UART, which
+ *      needs to be ignored, since UIM would do that
+ *      when it receives request from KIM for ldisc installation.
+ */
+struct hci_command {
+        u8 prefix;
+        u16 opcode;
+        u8 plen;
+        u32 speed;
+} __attribute__ ((packed));
+
+/*
+ * header information used by st_ll.c
+ */
+
+/* ST LL receiver states */
+#define ST_W4_PACKET_TYPE       0
+#define ST_W4_HEADER            1
+#define ST_W4_DATA              2
+
+/* ST LL state machines */
+#define ST_LL_ASLEEP               0
+#define ST_LL_ASLEEP_TO_AWAKE      1
+#define ST_LL_AWAKE                2
+#define ST_LL_AWAKE_TO_ASLEEP      3
+#define ST_LL_INVALID              4
+
+/* different PM notifications coming from chip */
+#define LL_SLEEP_IND    0x30
+#define LL_SLEEP_ACK    0x31
+#define LL_WAKE_UP_IND  0x32
+#define LL_WAKE_UP_ACK  0x33
+
+/* initialize and de-init ST LL */
+long st_ll_init(struct st_data_s *);
+long st_ll_deinit(struct st_data_s *);
+
+/**
+ * enable/disable ST LL along with KIM start/stop
+ * called by ST Core
+ */
+void st_ll_enable(struct st_data_s *);
+void st_ll_disable(struct st_data_s *);
+
+/**
+ * various funcs used by ST core to set/get the various PM states
+ * of the chip.
+ */
+unsigned long st_ll_getstate(struct st_data_s *);
+unsigned long st_ll_sleep_state(struct st_data_s *, unsigned char);
+void st_ll_wakeup(struct st_data_s *);
+
+/*
+ * header information used by st_core.c for FM and GPS
+ * packet parsing, the bluetooth headers are already available
+ * at net/bluetooth/
+ */
+
+struct fm_event_hdr {
+        u8 plen;
+} __attribute__ ((packed));
+
+#define FM_MAX_FRAME_SIZE 0xFF  /* TODO: */
+#define FM_EVENT_HDR_SIZE 1     /* size of fm_event_hdr */
+#define ST_FM_CH8_PKT 0x8
+
+/* gps stuff */
+struct gps_event_hdr {
+        u8 opcode;
+        u16 plen;
+} __attribute__ ((packed));
+
+/* platform data */
+struct ti_st_plat_data {
+        long nshutdown_gpio;
+        unsigned char dev_name[UART_DEV_NAME_LEN]; /* uart name */
+        unsigned char flow_cntrl; /* flow control flag */
+        unsigned long baud_rate;
+        int (*suspend)(struct platform_device *, pm_message_t);
+        int (*resume)(struct platform_device *);
+};
+
+#endif /* TI_WILINK_ST_H */