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authorGreg Kroah-Hartman <gregkh@suse.de>2010-10-28 09:44:56 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2010-10-28 09:44:56 -0700
commite4c5bf8e3dca827a1b3a6fac494eae8c74b7e1e7 (patch)
treeea51b391f7d74ca695dcb9f5e46eb02688a92ed9 /drivers/misc
parent81280572ca6f54009edfa4deee563e8678784218 (diff)
parenta4ac0d847af9dd34d5953a5e264400326144b6b2 (diff)
Merge 'staging-next' to Linus's tree
This merges the staging-next tree to Linus's tree and resolves some conflicts that were present due to changes in other trees that were affected by files here. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/Kconfig1
-rw-r--r--drivers/misc/Makefile1
-rw-r--r--drivers/misc/ti-st/Kconfig17
-rw-r--r--drivers/misc/ti-st/Makefile6
-rw-r--r--drivers/misc/ti-st/st_core.c992
-rw-r--r--drivers/misc/ti-st/st_kim.c799
-rw-r--r--drivers/misc/ti-st/st_ll.c150
7 files changed, 1966 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 5a74db75f66f..39a2173b4e6c 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -447,5 +447,6 @@ source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
source "drivers/misc/iwmc3200top/Kconfig"
+source "drivers/misc/ti-st/Kconfig"
endif # MISC_DEVICES
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 4be5c6fc5ef4..47af4cd08f01 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -40,3 +40,4 @@ obj-y += cb710/
obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o
obj-$(CONFIG_ARM_CHARLCD) += arm-charlcd.o
obj-$(CONFIG_PCH_PHUB) += pch_phub.o
+obj-y += ti-st/
diff --git a/drivers/misc/ti-st/Kconfig b/drivers/misc/ti-st/Kconfig
new file mode 100644
index 000000000000..2c8c3f39710d
--- /dev/null
+++ b/drivers/misc/ti-st/Kconfig
@@ -0,0 +1,17 @@
+#
+# TI's shared transport line discipline and the protocol
+# drivers (BT, FM and GPS)
+#
+menu "Texas Instruments shared transport line discipline"
+config TI_ST
+ tristate "Shared transport core driver"
+ depends on RFKILL
+ select FW_LOADER
+ help
+ This enables the shared transport core driver for TI
+ BT / FM and GPS combo chips. This enables protocol drivers
+ to register themselves with core and send data, the responses
+ are returned to relevant protocol drivers based on their
+ packet types.
+
+endmenu
diff --git a/drivers/misc/ti-st/Makefile b/drivers/misc/ti-st/Makefile
new file mode 100644
index 000000000000..78d7ebb14749
--- /dev/null
+++ b/drivers/misc/ti-st/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for TI's shared transport line discipline
+# and its protocol drivers (BT, FM, GPS)
+#
+obj-$(CONFIG_TI_ST) += st_drv.o
+st_drv-objs := st_core.o st_kim.o st_ll.o
diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c
new file mode 100644
index 000000000000..f9aad06d1ae5
--- /dev/null
+++ b/drivers/misc/ti-st/st_core.c
@@ -0,0 +1,992 @@
+/*
+ * Shared Transport Line discipline driver Core
+ * This hooks up ST KIM driver and ST LL 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
+ *
+ */
+
+#define pr_fmt(fmt) "(stc): " fmt
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+
+/* understand BT, FM and GPS for now */
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci.h>
+#include <linux/ti_wilink_st.h>
+
+/* function pointer pointing to either,
+ * st_kim_recv during registration to receive fw download responses
+ * st_int_recv after registration to receive proto stack responses
+ */
+void (*st_recv) (void*, const unsigned char*, long);
+
+/********************************************************************/
+#if 0
+/* internal misc functions */
+bool is_protocol_list_empty(void)
+{
+ unsigned char i = 0;
+ pr_debug(" %s ", __func__);
+ for (i = 0; i < ST_MAX; i++) {
+ if (st_gdata->list[i] != NULL)
+ return ST_NOTEMPTY;
+ /* not empty */
+ }
+ /* list empty */
+ return ST_EMPTY;
+}
+#endif
+
+/* can be called in from
+ * -- KIM (during fw download)
+ * -- ST Core (during st_write)
+ *
+ * This is the internal write function - a wrapper
+ * to tty->ops->write
+ */
+int st_int_write(struct st_data_s *st_gdata,
+ const unsigned char *data, int count)
+{
+ struct tty_struct *tty;
+ if (unlikely(st_gdata == NULL || st_gdata->tty == NULL)) {
+ pr_err("tty unavailable to perform write");
+ return -1;
+ }
+ tty = st_gdata->tty;
+#ifdef VERBOSE
+ print_hex_dump(KERN_DEBUG, "<out<", DUMP_PREFIX_NONE,
+ 16, 1, data, count, 0);
+#endif
+ return tty->ops->write(tty, data, count);
+
+}
+
+/*
+ * push the skb received to relevant
+ * protocol stacks
+ */
+void st_send_frame(enum proto_type protoid, struct st_data_s *st_gdata)
+{
+ pr_info(" %s(prot:%d) ", __func__, protoid);
+
+ if (unlikely
+ (st_gdata == NULL || st_gdata->rx_skb == NULL
+ || st_gdata->list[protoid] == NULL)) {
+ pr_err("protocol %d not registered, no data to send?",
+ protoid);
+ kfree_skb(st_gdata->rx_skb);
+ return;
+ }
+ /* this cannot fail
+ * this shouldn't take long
+ * - should be just skb_queue_tail for the
+ * protocol stack driver
+ */
+ if (likely(st_gdata->list[protoid]->recv != NULL)) {
+ if (unlikely
+ (st_gdata->list[protoid]->recv
+ (st_gdata->list[protoid]->priv_data, st_gdata->rx_skb)
+ != 0)) {
+ pr_err(" proto stack %d's ->recv failed", protoid);
+ kfree_skb(st_gdata->rx_skb);
+ return;
+ }
+ } else {
+ pr_err(" proto stack %d's ->recv null", protoid);
+ kfree_skb(st_gdata->rx_skb);
+ }
+ return;
+}
+
+/**
+ * st_reg_complete -
+ * to call registration complete callbacks
+ * of all protocol stack drivers
+ */
+void st_reg_complete(struct st_data_s *st_gdata, char err)
+{
+ unsigned char i = 0;
+ pr_info(" %s ", __func__);
+ for (i = 0; i < ST_MAX; i++) {
+ if (likely(st_gdata != NULL && st_gdata->list[i] != NULL &&
+ st_gdata->list[i]->reg_complete_cb != NULL))
+ st_gdata->list[i]->reg_complete_cb
+ (st_gdata->list[i]->priv_data, err);
+ }
+}
+
+static inline int st_check_data_len(struct st_data_s *st_gdata,
+ int protoid, int len)
+{
+ int room = skb_tailroom(st_gdata->rx_skb);
+
+ pr_debug("len %d room %d", len, room);
+
+ if (!len) {
+ /* Received packet has only packet header and
+ * has zero length payload. So, ask ST CORE to
+ * forward the packet to protocol driver (BT/FM/GPS)
+ */
+ st_send_frame(protoid, st_gdata);
+
+ } else if (len > room) {
+ /* Received packet's payload length is larger.
+ * We can't accommodate it in created skb.
+ */
+ pr_err("Data length is too large len %d room %d", len,
+ room);
+ kfree_skb(st_gdata->rx_skb);
+ } else {
+ /* Packet header has non-zero payload length and
+ * we have enough space in created skb. Lets read
+ * payload data */
+ st_gdata->rx_state = ST_BT_W4_DATA;
+ st_gdata->rx_count = len;
+ return len;
+ }
+
+ /* Change ST state to continue to process next
+ * packet */
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ st_gdata->rx_skb = NULL;
+ st_gdata->rx_count = 0;
+
+ return 0;
+}
+
+/**
+ * st_wakeup_ack - internal function for action when wake-up ack
+ * received
+ */
+static inline void st_wakeup_ack(struct st_data_s *st_gdata,
+ unsigned char cmd)
+{
+ struct sk_buff *waiting_skb;
+ unsigned long flags = 0;
+
+ spin_lock_irqsave(&st_gdata->lock, flags);
+ /* de-Q from waitQ and Q in txQ now that the
+ * chip is awake
+ */
+ while ((waiting_skb = skb_dequeue(&st_gdata->tx_waitq)))
+ skb_queue_tail(&st_gdata->txq, waiting_skb);
+
+ /* state forwarded to ST LL */
+ st_ll_sleep_state(st_gdata, (unsigned long)cmd);
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+
+ /* wake up to send the recently copied skbs from waitQ */
+ st_tx_wakeup(st_gdata);
+}
+
+/**
+ * st_int_recv - ST's internal receive function.
+ * Decodes received RAW data and forwards to corresponding
+ * client drivers (Bluetooth,FM,GPS..etc).
+ * This can receive various types of packets,
+ * HCI-Events, ACL, SCO, 4 types of HCI-LL PM packets
+ * CH-8 packets from FM, CH-9 packets from GPS cores.
+ */
+void st_int_recv(void *disc_data,
+ const unsigned char *data, long count)
+{
+ char *ptr;
+ struct hci_event_hdr *eh;
+ struct hci_acl_hdr *ah;
+ struct hci_sco_hdr *sh;
+ struct fm_event_hdr *fm;
+ struct gps_event_hdr *gps;
+ int len = 0, type = 0, dlen = 0;
+ static enum proto_type protoid = ST_MAX;
+ struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
+
+ ptr = (char *)data;
+ /* tty_receive sent null ? */
+ if (unlikely(ptr == NULL) || (st_gdata == NULL)) {
+ pr_err(" received null from TTY ");
+ return;
+ }
+
+ pr_info("count %ld rx_state %ld"
+ "rx_count %ld", count, st_gdata->rx_state,
+ st_gdata->rx_count);
+
+ /* Decode received bytes here */
+ while (count) {
+ if (st_gdata->rx_count) {
+ len = min_t(unsigned int, st_gdata->rx_count, count);
+ memcpy(skb_put(st_gdata->rx_skb, len), ptr, len);
+ st_gdata->rx_count -= len;
+ count -= len;
+ ptr += len;
+
+ if (st_gdata->rx_count)
+ continue;
+
+ /* Check ST RX state machine , where are we? */
+ switch (st_gdata->rx_state) {
+
+ /* Waiting for complete packet ? */
+ case ST_BT_W4_DATA:
+ pr_debug("Complete pkt received");
+
+ /* Ask ST CORE to forward
+ * the packet to protocol driver */
+ st_send_frame(protoid, st_gdata);
+
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ st_gdata->rx_skb = NULL;
+ protoid = ST_MAX; /* is this required ? */
+ continue;
+
+ /* Waiting for Bluetooth event header ? */
+ case ST_BT_W4_EVENT_HDR:
+ eh = (struct hci_event_hdr *)st_gdata->rx_skb->
+ data;
+
+ pr_debug("Event header: evt 0x%2.2x"
+ "plen %d", eh->evt, eh->plen);
+
+ st_check_data_len(st_gdata, protoid, eh->plen);
+ continue;
+
+ /* Waiting for Bluetooth acl header ? */
+ case ST_BT_W4_ACL_HDR:
+ ah = (struct hci_acl_hdr *)st_gdata->rx_skb->
+ data;
+ dlen = __le16_to_cpu(ah->dlen);
+
+ pr_info("ACL header: dlen %d", dlen);
+
+ st_check_data_len(st_gdata, protoid, dlen);
+ continue;
+
+ /* Waiting for Bluetooth sco header ? */
+ case ST_BT_W4_SCO_HDR:
+ sh = (struct hci_sco_hdr *)st_gdata->rx_skb->
+ data;
+
+ pr_info("SCO header: dlen %d", sh->dlen);
+
+ st_check_data_len(st_gdata, protoid, sh->dlen);
+ continue;
+ case ST_FM_W4_EVENT_HDR:
+ fm = (struct fm_event_hdr *)st_gdata->rx_skb->
+ data;
+ pr_info("FM Header: ");
+ st_check_data_len(st_gdata, ST_FM, fm->plen);
+ continue;
+ /* TODO : Add GPS packet machine logic here */
+ case ST_GPS_W4_EVENT_HDR:
+ /* [0x09 pkt hdr][R/W byte][2 byte len] */
+ gps = (struct gps_event_hdr *)st_gdata->rx_skb->
+ data;
+ pr_info("GPS Header: ");
+ st_check_data_len(st_gdata, ST_GPS, gps->plen);
+ continue;
+ } /* end of switch rx_state */
+ }
+
+ /* end of if rx_count */
+ /* Check first byte of packet and identify module
+ * owner (BT/FM/GPS) */
+ switch (*ptr) {
+
+ /* Bluetooth event packet? */
+ case HCI_EVENT_PKT:
+ pr_info("Event packet");
+ st_gdata->rx_state = ST_BT_W4_EVENT_HDR;
+ st_gdata->rx_count = HCI_EVENT_HDR_SIZE;
+ type = HCI_EVENT_PKT;
+ protoid = ST_BT;
+ break;
+
+ /* Bluetooth acl packet? */
+ case HCI_ACLDATA_PKT:
+ pr_info("ACL packet");
+ st_gdata->rx_state = ST_BT_W4_ACL_HDR;
+ st_gdata->rx_count = HCI_ACL_HDR_SIZE;
+ type = HCI_ACLDATA_PKT;
+ protoid = ST_BT;
+ break;
+
+ /* Bluetooth sco packet? */
+ case HCI_SCODATA_PKT:
+ pr_info("SCO packet");
+ st_gdata->rx_state = ST_BT_W4_SCO_HDR;
+ st_gdata->rx_count = HCI_SCO_HDR_SIZE;
+ type = HCI_SCODATA_PKT;
+ protoid = ST_BT;
+ break;
+
+ /* Channel 8(FM) packet? */
+ case ST_FM_CH8_PKT:
+ pr_info("FM CH8 packet");
+ type = ST_FM_CH8_PKT;
+ st_gdata->rx_state = ST_FM_W4_EVENT_HDR;
+ st_gdata->rx_count = FM_EVENT_HDR_SIZE;
+ protoid = ST_FM;
+ break;
+
+ /* Channel 9(GPS) packet? */
+ case 0x9: /*ST_LL_GPS_CH9_PKT */
+ pr_info("GPS CH9 packet");
+ type = 0x9; /* ST_LL_GPS_CH9_PKT; */
+ protoid = ST_GPS;
+ st_gdata->rx_state = ST_GPS_W4_EVENT_HDR;
+ st_gdata->rx_count = 3; /* GPS_EVENT_HDR_SIZE -1*/
+ break;
+ case LL_SLEEP_IND:
+ case LL_SLEEP_ACK:
+ case LL_WAKE_UP_IND:
+ pr_info("PM packet");
+ /* this takes appropriate action based on
+ * sleep state received --
+ */
+ st_ll_sleep_state(st_gdata, *ptr);
+ ptr++;
+ count--;
+ continue;
+ case LL_WAKE_UP_ACK:
+ pr_info("PM packet");
+ /* wake up ack received */
+ st_wakeup_ack(st_gdata, *ptr);
+ ptr++;
+ count--;
+ continue;
+ /* Unknow packet? */
+ default:
+ pr_err("Unknown packet type %2.2x", (__u8) *ptr);
+ ptr++;
+ count--;
+ continue;
+ };
+ ptr++;
+ count--;
+
+ switch (protoid) {
+ case ST_BT:
+ /* Allocate new packet to hold received data */
+ st_gdata->rx_skb =
+ bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+ if (!st_gdata->rx_skb) {
+ pr_err("Can't allocate mem for new packet");
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ st_gdata->rx_count = 0;
+ return;
+ }
+ bt_cb(st_gdata->rx_skb)->pkt_type = type;
+ break;
+ case ST_FM: /* for FM */
+ st_gdata->rx_skb =
+ alloc_skb(FM_MAX_FRAME_SIZE, GFP_ATOMIC);
+ if (!st_gdata->rx_skb) {
+ pr_err("Can't allocate mem for new packet");
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ st_gdata->rx_count = 0;
+ return;
+ }
+ /* place holder 0x08 */
+ skb_reserve(st_gdata->rx_skb, 1);
+ st_gdata->rx_skb->cb[0] = ST_FM_CH8_PKT;
+ break;
+ case ST_GPS:
+ /* for GPS */
+ st_gdata->rx_skb =
+ alloc_skb(100 /*GPS_MAX_FRAME_SIZE */ , GFP_ATOMIC);
+ if (!st_gdata->rx_skb) {
+ pr_err("Can't allocate mem for new packet");
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ st_gdata->rx_count = 0;
+ return;
+ }
+ /* place holder 0x09 */
+ skb_reserve(st_gdata->rx_skb, 1);
+ st_gdata->rx_skb->cb[0] = 0x09; /*ST_GPS_CH9_PKT; */
+ break;
+ case ST_MAX:
+ break;
+ }
+ }
+ pr_debug("done %s", __func__);
+ return;
+}
+
+/**
+ * st_int_dequeue - internal de-Q function.
+ * If the previous data set was not written
+ * completely, return that skb which has the pending data.
+ * In normal cases, return top of txq.
+ */
+struct sk_buff *st_int_dequeue(struct st_data_s *st_gdata)
+{
+ struct sk_buff *returning_skb;
+
+ pr_debug("%s", __func__);
+ if (st_gdata->tx_skb != NULL) {
+ returning_skb = st_gdata->tx_skb;
+ st_gdata->tx_skb = NULL;
+ return returning_skb;
+ }
+ return skb_dequeue(&st_gdata->txq);
+}
+
+/**
+ * st_int_enqueue - internal Q-ing function.
+ * Will either Q the skb to txq or the tx_waitq
+ * depending on the ST LL state.
+ * If the chip is asleep, then Q it onto waitq and
+ * wakeup the chip.
+ * txq and waitq needs protection since the other contexts
+ * may be sending data, waking up chip.
+ */
+void st_int_enqueue(struct st_data_s *st_gdata, struct sk_buff *skb)
+{
+ unsigned long flags = 0;
+
+ pr_debug("%s", __func__);
+ spin_lock_irqsave(&st_gdata->lock, flags);
+
+ switch (st_ll_getstate(st_gdata)) {
+ case ST_LL_AWAKE:
+ pr_info("ST LL is AWAKE, sending normally");
+ skb_queue_tail(&st_gdata->txq, skb);
+ break;
+ case ST_LL_ASLEEP_TO_AWAKE:
+ skb_queue_tail(&st_gdata->tx_waitq, skb);
+ break;
+ case ST_LL_AWAKE_TO_ASLEEP:
+ pr_err("ST LL is illegal state(%ld),"
+ "purging received skb.", st_ll_getstate(st_gdata));
+ kfree_skb(skb);
+ break;
+ case ST_LL_ASLEEP:
+ skb_queue_tail(&st_gdata->tx_waitq, skb);
+ st_ll_wakeup(st_gdata);
+ break;
+ default:
+ pr_err("ST LL is illegal state(%ld),"
+ "purging received skb.", st_ll_getstate(st_gdata));
+ kfree_skb(skb);
+ break;
+ }
+
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ pr_debug("done %s", __func__);
+ return;
+}
+
+/*
+ * internal wakeup function
+ * called from either
+ * - TTY layer when write's finished
+ * - st_write (in context of the protocol stack)
+ */
+void st_tx_wakeup(struct st_data_s *st_data)
+{
+ struct sk_buff *skb;
+ unsigned long flags; /* for irq save flags */
+ pr_debug("%s", __func__);
+ /* check for sending & set flag sending here */
+ if (test_and_set_bit(ST_TX_SENDING, &st_data->tx_state)) {
+ pr_info("ST already sending");
+ /* keep sending */
+ set_bit(ST_TX_WAKEUP, &st_data->tx_state);
+ return;
+ /* TX_WAKEUP will be checked in another
+ * context
+ */
+ }
+ do { /* come back if st_tx_wakeup is set */
+ /* woke-up to write */
+ clear_bit(ST_TX_WAKEUP, &st_data->tx_state);
+ while ((skb = st_int_dequeue(st_data))) {
+ int len;
+ spin_lock_irqsave(&st_data->lock, flags);
+ /* enable wake-up from TTY */
+ set_bit(TTY_DO_WRITE_WAKEUP, &st_data->tty->flags);
+ len = st_int_write(st_data, skb->data, skb->len);
+ skb_pull(skb, len);
+ /* if skb->len = len as expected, skb->len=0 */
+ if (skb->len) {
+ /* would be the next skb to be sent */
+ st_data->tx_skb = skb;
+ spin_unlock_irqrestore(&st_data->lock, flags);
+ break;
+ }
+ kfree_skb(skb);
+ spin_unlock_irqrestore(&st_data->lock, flags);
+ }
+ /* if wake-up is set in another context- restart sending */
+ } while (test_bit(ST_TX_WAKEUP, &st_data->tx_state));
+
+ /* clear flag sending */
+ clear_bit(ST_TX_SENDING, &st_data->tx_state);
+}
+
+/********************************************************************/
+/* functions called from ST KIM
+*/
+void kim_st_list_protocols(struct st_data_s *st_gdata, void *buf)
+{
+ seq_printf(buf, "[%d]\nBT=%c\nFM=%c\nGPS=%c\n",
+ st_gdata->protos_registered,
+ st_gdata->list[ST_BT] != NULL ? 'R' : 'U',
+ st_gdata->list[ST_FM] != NULL ? 'R' : 'U',
+ st_gdata->list[ST_GPS] != NULL ? 'R' : 'U');
+}
+
+/********************************************************************/
+/*
+ * functions called from protocol stack drivers
+ * to be EXPORT-ed
+ */
+long st_register(struct st_proto_s *new_proto)
+{
+ struct st_data_s *st_gdata;
+ long err = 0;
+ unsigned long flags = 0;
+
+ st_kim_ref(&st_gdata, 0);
+ pr_info("%s(%d) ", __func__, new_proto->type);
+ if (st_gdata == NULL || new_proto == NULL || new_proto->recv == NULL
+ || new_proto->reg_complete_cb == NULL) {
+ pr_err("gdata/new_proto/recv or reg_complete_cb not ready");
+ return -1;
+ }
+
+ if (new_proto->type < ST_BT || new_proto->type >= ST_MAX) {
+ pr_err("protocol %d not supported", new_proto->type);
+ return -EPROTONOSUPPORT;
+ }
+
+ if (st_gdata->list[new_proto->type] != NULL) {
+ pr_err("protocol %d already registered", new_proto->type);
+ return -EALREADY;
+ }
+
+ /* can be from process context only */
+ spin_lock_irqsave(&st_gdata->lock, flags);
+
+ if (test_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state)) {
+ pr_info(" ST_REG_IN_PROGRESS:%d ", new_proto->type);
+ /* fw download in progress */
+ st_kim_chip_toggle(new_proto->type, KIM_GPIO_ACTIVE);
+
+ st_gdata->list[new_proto->type] = new_proto;
+ st_gdata->protos_registered++;
+ new_proto->write = st_write;
+
+ set_bit(ST_REG_PENDING, &st_gdata->st_state);
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ return -EINPROGRESS;
+ } else if (st_gdata->protos_registered == ST_EMPTY) {
+ pr_info(" protocol list empty :%d ", new_proto->type);
+ set_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
+ st_recv = st_kim_recv;
+
+ /* release lock previously held - re-locked below */
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+
+ /* enable the ST LL - to set default chip state */
+ st_ll_enable(st_gdata);
+ /* this may take a while to complete
+ * since it involves BT fw download
+ */
+ err = st_kim_start(st_gdata->kim_data);
+ if (err != 0) {
+ clear_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
+ if ((st_gdata->protos_registered != ST_EMPTY) &&
+ (test_bit(ST_REG_PENDING, &st_gdata->st_state))) {
+ pr_err(" KIM failure complete callback ");
+ st_reg_complete(st_gdata, -1);
+ }
+
+ return -1;
+ }
+
+ /* the protocol might require other gpios to be toggled
+ */
+ st_kim_chip_toggle(new_proto->type, KIM_GPIO_ACTIVE);
+
+ clear_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
+ st_recv = st_int_recv;
+
+ /* this is where all pending registration
+ * are signalled to be complete by calling callback functions
+ */
+ if ((st_gdata->protos_registered != ST_EMPTY) &&
+ (test_bit(ST_REG_PENDING, &st_gdata->st_state))) {
+ pr_debug(" call reg complete callback ");
+ st_reg_complete(st_gdata, 0);
+ }
+ clear_bit(ST_REG_PENDING, &st_gdata->st_state);
+
+ /* check for already registered once more,
+ * since the above check is old
+ */
+ if (st_gdata->list[new_proto->type] != NULL) {
+ pr_err(" proto %d already registered ",
+ new_proto->type);
+ return -EALREADY;
+ }
+
+ spin_lock_irqsave(&st_gdata->lock, flags);
+ st_gdata->list[new_proto->type] = new_proto;
+ st_gdata->protos_registered++;
+ new_proto->write = st_write;
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ return err;
+ }
+ /* if fw is already downloaded & new stack registers protocol */
+ else {
+ switch (new_proto->type) {
+ case ST_BT:
+ /* do nothing */
+ break;
+ case ST_FM:
+ case ST_GPS:
+ st_kim_chip_toggle(new_proto->type, KIM_GPIO_ACTIVE);
+ break;
+ case ST_MAX:
+ default:
+ pr_err("%d protocol not supported",
+ new_proto->type);
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ return -EPROTONOSUPPORT;
+ }
+ st_gdata->list[new_proto->type] = new_proto;
+ st_gdata->protos_registered++;
+ new_proto->write = st_write;
+
+ /* lock already held before entering else */
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ return err;
+ }
+ pr_debug("done %s(%d) ", __func__, new_proto->type);
+}
+EXPORT_SYMBOL_GPL(st_register);
+
+/* to unregister a protocol -
+ * to be called from protocol stack driver
+ */
+long st_unregister(enum proto_type type)
+{
+ long err = 0;
+ unsigned long flags = 0;
+ struct st_data_s *st_gdata;
+
+ pr_debug("%s: %d ", __func__, type);
+
+ st_kim_ref(&st_gdata, 0);
+ if (type < ST_BT || type >= ST_MAX) {
+ pr_err(" protocol %d not supported", type);
+ return -EPROTONOSUPPORT;
+ }
+
+ spin_lock_irqsave(&st_gdata->lock, flags);
+
+ if (st_gdata->list[type] == NULL) {
+ pr_err(" protocol %d not registered", type);
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ return -EPROTONOSUPPORT;
+ }
+
+ st_gdata->protos_registered--;
+ st_gdata->list[type] = NULL;
+
+ /* kim ignores BT in the below function
+ * and handles the rest, BT is toggled
+ * only in kim_start and kim_stop
+ */
+ st_kim_chip_toggle(type, KIM_GPIO_INACTIVE);
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+
+ if ((st_gdata->protos_registered == ST_EMPTY) &&
+ (!test_bit(ST_REG_PENDING, &st_gdata->st_state))) {
+ pr_info(" all protocols unregistered ");
+
+ /* stop traffic on tty */
+ if (st_gdata->tty) {
+ tty_ldisc_flush(st_gdata->tty);
+ stop_tty(st_gdata->tty);
+ }
+
+ /* all protocols now unregistered */
+ st_kim_stop(st_gdata->kim_data);
+ /* disable ST LL */
+ st_ll_disable(st_gdata);
+ }
+ return err;
+}
+
+/*
+ * called in protocol stack drivers
+ * via the write function pointer
+ */
+long st_write(struct sk_buff *skb)
+{
+ struct st_data_s *st_gdata;
+#ifdef DEBUG
+ enum proto_type protoid = ST_MAX;
+#endif
+ long len;
+
+ st_kim_ref(&st_gdata, 0);
+ if (unlikely(skb == NULL || st_gdata == NULL
+ || st_gdata->tty == NULL)) {
+ pr_err("data/tty unavailable to perform write");
+ return -1;
+ }
+#ifdef DEBUG /* open-up skb to read the 1st byte */
+ switch (skb->data[0]) {
+ case HCI_COMMAND_PKT:
+ case HCI_ACLDATA_PKT:
+ case HCI_SCODATA_PKT:
+ protoid = ST_BT;
+ break;
+ case ST_FM_CH8_PKT:
+ protoid = ST_FM;
+ break;
+ case 0x09:
+ protoid = ST_GPS;
+ break;
+ }
+ if (unlikely(st_gdata->list[protoid] == NULL)) {
+ pr_err(" protocol %d not registered, and writing? ",
+ protoid);
+ return -1;
+ }
+#endif
+ pr_debug("%d to be written", skb->len);
+ len = skb->len;
+
+ /* st_ll to decide where to enqueue the skb */
+ st_int_enqueue(st_gdata, skb);
+ /* wake up */
+ st_tx_wakeup(st_gdata);
+
+ /* return number of bytes written */
+ return len;
+}
+
+/* for protocols making use of shared transport */
+EXPORT_SYMBOL_GPL(st_unregister);
+
+/********************************************************************/
+/*
+ * functions called from TTY layer
+ */
+static int st_tty_open(struct tty_struct *tty)
+{
+ int err = 0;
+ struct st_data_s *st_gdata;
+ pr_info("%s ", __func__);
+
+ st_kim_ref(&st_gdata, 0);
+ st_gdata->tty = tty;
+ tty->disc_data = st_gdata;
+
+ /* don't do an wakeup for now */
+ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+
+ /* mem already allocated
+ */
+ tty->receive_room = 65536;
+ /* Flush any pending characters in the driver and discipline. */
+ tty_ldisc_flush(tty);
+ tty_driver_flush_buffer(tty);
+ /*
+ * signal to UIM via KIM that -
+ * installation of N_TI_WL ldisc is complete
+ */
+ st_kim_complete(st_gdata->kim_data);
+ pr_debug("done %s", __func__);
+ return err;
+}
+
+static void st_tty_close(struct tty_struct *tty)
+{
+ unsigned char i = ST_MAX;
+ unsigned long flags = 0;
+ struct st_data_s *st_gdata = tty->disc_data;
+
+ pr_info("%s ", __func__);
+
+ /* TODO:
+ * if a protocol has been registered & line discipline
+ * un-installed for some reason - what should be done ?
+ */
+ spin_lock_irqsave(&st_gdata->lock, flags);
+ for (i = ST_BT; i < ST_MAX; i++) {
+ if (st_gdata->list[i] != NULL)
+ pr_err("%d not un-registered", i);
+ st_gdata->list[i] = NULL;
+ }
+ st_gdata->protos_registered = 0;
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+ /*
+ * signal to UIM via KIM that -
+ * N_TI_WL ldisc is un-installed
+ */
+ st_kim_complete(st_gdata->kim_data);
+ st_gdata->tty = NULL;
+ /* Flush any pending characters in the driver and discipline. */
+ tty_ldisc_flush(tty);
+ tty_driver_flush_buffer(tty);
+
+ spin_lock_irqsave(&st_gdata->lock, flags);
+ /* empty out txq and tx_waitq */
+ skb_queue_purge(&st_gdata->txq);
+ skb_queue_purge(&st_gdata->tx_waitq);
+ /* reset the TTY Rx states of ST */
+ st_gdata->rx_count = 0;
+ st_gdata->rx_state = ST_W4_PACKET_TYPE;
+ kfree_skb(st_gdata->rx_skb);
+ st_gdata->rx_skb = NULL;
+ spin_unlock_irqrestore(&st_gdata->lock, flags);
+
+ pr_debug("%s: done ", __func__);
+}
+
+static void st_tty_receive(struct tty_struct *tty, const unsigned char *data,
+ char *tty_flags, int count)
+{
+
+#ifdef VERBOSE
+ print_hex_dump(KERN_DEBUG, ">in>", DUMP_PREFIX_NONE,
+ 16, 1, data, count, 0);
+#endif
+
+ /*
+ * if fw download is in progress then route incoming data
+ * to KIM for validation
+ */
+ st_recv(tty->disc_data, data, count);
+ pr_debug("done %s", __func__);
+}
+
+/* wake-up function called in from the TTY layer
+ * inside the internal wakeup function will be called
+ */
+static void st_tty_wakeup(struct tty_struct *tty)
+{
+ struct st_data_s *st_gdata = tty->disc_data;
+ pr_debug("%s ", __func__);
+ /* don't do an wakeup for now */
+ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
+
+ /* call our internal wakeup */
+ st_tx_wakeup((void *)st_gdata);
+}
+
+static void st_tty_flush_buffer(struct tty_struct *tty)
+{
+ struct st_data_s *st_gdata = tty->disc_data;
+ pr_debug("%s ", __func__);
+
+ kfree_skb(st_gdata->tx_skb);
+ st_gdata->tx_skb = NULL;
+
+ tty->ops->flush_buffer(tty);
+ return;
+}
+
+static struct tty_ldisc_ops st_ldisc_ops = {
+ .magic = TTY_LDISC_MAGIC,
+ .name = "n_st",
+ .open = st_tty_open,
+ .close = st_tty_close,
+ .receive_buf = st_tty_receive,
+ .write_wakeup = st_tty_wakeup,
+ .flush_buffer = st_tty_flush_buffer,
+ .owner = THIS_MODULE
+};
+
+/********************************************************************/
+int st_core_init(struct st_data_s **core_data)
+{
+ struct st_data_s *st_gdata;
+ long err;
+
+ err = tty_register_ldisc(N_TI_WL, &st_ldisc_ops);
+ if (err) {
+ pr_err("error registering %d line discipline %ld",
+ N_TI_WL, err);
+ return err;
+ }
+ pr_debug("registered n_shared line discipline");
+
+ st_gdata = kzalloc(sizeof(struct st_data_s), GFP_KERNEL);
+ if (!st_gdata) {
+ pr_err("memory allocation failed");
+ err = tty_unregister_ldisc(N_TI_WL);
+ if (err)
+ pr_err("unable to un-register ldisc %ld", err);
+ err = -ENOMEM;
+ return err;
+ }
+
+ /* Initialize ST TxQ and Tx waitQ queue head. All BT/FM/GPS module skb's
+ * will be pushed in this queue for actual transmission.
+ */
+ skb_queue_head_init(&st_gdata->txq);
+ skb_queue_head_init(&st_gdata->tx_waitq);
+
+ /* Locking used in st_int_enqueue() to avoid multiple execution */
+ spin_lock_init(&st_gdata->lock);
+
+ err = st_ll_init(st_gdata);
+ if (err) {
+ pr_err("error during st_ll initialization(%ld)", err);
+ kfree(st_gdata);
+ err = tty_unregister_ldisc(N_TI_WL);
+ if (err)
+ pr_err("unable to un-register ldisc");
+ return -1;
+ }
+ *core_data = st_gdata;
+ return 0;
+}
+
+void st_core_exit(struct st_data_s *st_gdata)
+{
+ long err;
+ /* internal module cleanup */
+ err = st_ll_deinit(st_gdata);
+ if (err)
+ pr_err("error during deinit of ST LL %ld", err);
+
+ if (st_gdata != NULL) {
+ /* Free ST Tx Qs and skbs */
+ skb_queue_purge(&st_gdata->txq);
+ skb_queue_purge(&st_gdata->tx_waitq);
+ kfree_skb(st_gdata->rx_skb);
+ kfree_skb(st_gdata->tx_skb);
+ /* TTY ldisc cleanup */
+ err = tty_unregister_ldisc(N_TI_WL);
+ if (err)
+ pr_err("unable to un-register ldisc %ld", err);
+ /* free the global data pointer */
+ kfree(st_gdata);
+ }
+}
+
+
diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c
new file mode 100644
index 000000000000..73b6c8b0e869
--- /dev/null
+++ b/drivers/misc/ti-st/st_kim.c
@@ -0,0 +1,799 @@
+/*
+ * Shared Transport Line discipline driver Core
+ * Init Manager module responsible for GPIO control
+ * and firmware download
+ * 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
+ *
+ */
+
+#define pr_fmt(fmt) "(stk) :" fmt
+#include <linux/platform_device.h>
+#include <linux/jiffies.h>
+#include <linux/firmware.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/gpio.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
+#include <linux/sched.h>
+#include <linux/rfkill.h>
+
+/* understand BT events for fw response */
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/hci.h>
+
+#include <linux/ti_wilink_st.h>
+
+
+static int kim_probe(struct platform_device *pdev);
+static int kim_remove(struct platform_device *pdev);
+
+/* KIM platform device driver structure */
+static struct platform_driver kim_platform_driver = {
+ .probe = kim_probe,
+ .remove = kim_remove,
+ /* TODO: ST driver power management during suspend/resume ?
+ */
+#if 0
+ .suspend = kim_suspend,
+ .resume = kim_resume,
+#endif
+ .driver = {
+ .name = "kim",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int kim_toggle_radio(void*, bool);
+static const struct rfkill_ops kim_rfkill_ops = {
+ .set_block = kim_toggle_radio,
+};
+
+/* strings to be used for rfkill entries and by
+ * ST Core to be used for sysfs debug entry
+ */
+#define PROTO_ENTRY(type, name) name
+const unsigned char *protocol_names[] = {
+ PROTO_ENTRY(ST_BT, "Bluetooth"),
+ PROTO_ENTRY(ST_FM, "FM"),
+ PROTO_ENTRY(ST_GPS, "GPS"),
+};
+
+#define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */
+static struct platform_device *st_kim_devices[MAX_ST_DEVICES];
+
+/**********************************************************************/
+/* internal functions */
+
+/**
+ * st_get_plat_device -
+ * function which returns the reference to the platform device
+ * requested by id. As of now only 1 such device exists (id=0)
+ * the context requesting for reference can get the id to be
+ * requested by a. The protocol driver which is registering or
+ * b. the tty device which is opened.
+ */
+static struct platform_device *st_get_plat_device(int id)
+{
+ return st_kim_devices[id];
+}
+
+/**
+ * validate_firmware_response -
+ * function to return whether the firmware response was proper
+ * in case of error don't complete so that waiting for proper
+ * response times out
+ */
+void validate_firmware_response(struct kim_data_s *kim_gdata)
+{
+ struct sk_buff *skb = kim_gdata->rx_skb;
+ if (unlikely(skb->data[5] != 0)) {
+ pr_err("no proper response during fw download");
+ pr_err("data6 %x", skb->data[5]);
+ return; /* keep waiting for the proper response */
+ }
+ /* becos of all the script being downloaded */
+ complete_all(&kim_gdata->kim_rcvd);
+ kfree_skb(skb);
+}
+
+/* check for data len received inside kim_int_recv
+ * most often hit the last case to update state to waiting for data
+ */
+static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len)
+{
+ register int room = skb_tailroom(kim_gdata->rx_skb);
+
+ pr_debug("len %d room %d", len, room);
+
+ if (!len) {
+ validate_firmware_response(kim_gdata);
+ } else if (len > room) {
+ /* Received packet's payload length is larger.
+ * We can't accommodate it in created skb.
+ */
+ pr_err("Data length is too large len %d room %d", len,
+ room);
+ kfree_skb(kim_gdata->rx_skb);
+ } else {
+ /* Packet header has non-zero payload length and
+ * we have enough space in created skb. Lets read
+ * payload data */
+ kim_gdata->rx_state = ST_BT_W4_DATA;
+ kim_gdata->rx_count = len;
+ return len;
+ }
+
+ /* Change ST LL state to continue to process next
+ * packet */
+ kim_gdata->rx_state = ST_W4_PACKET_TYPE;
+ kim_gdata->rx_skb = NULL;
+ kim_gdata->rx_count = 0;
+
+ return 0;
+}
+
+/**
+ * kim_int_recv - receive function called during firmware download
+ * firmware download responses on different UART drivers
+ * have been observed to come in bursts of different
+ * tty_receive and hence the logic
+ */
+void kim_int_recv(struct kim_data_s *kim_gdata,
+ const unsigned char *data, long count)
+{
+ const unsigned char *ptr;
+ struct hci_event_hdr *eh;
+ int len = 0, type = 0;
+
+ pr_debug("%s", __func__);
+ /* Decode received bytes here */
+ ptr = data;
+ if (unlikely(ptr == NULL)) {
+ pr_err(" received null from TTY ");
+ return;
+ }
+
+ while (count) {
+ if (kim_gdata->rx_count) {
+ len = min_t(unsigned int, kim_gdata->rx_count, count);
+ memcpy(skb_put(kim_gdata->rx_skb, len), ptr, len);
+ kim_gdata->rx_count -= len;
+ count -= len;
+ ptr += len;
+
+ if (kim_gdata->rx_count)
+ continue;
+
+ /* Check ST RX state machine , where are we? */
+ switch (kim_gdata->rx_state) {
+ /* Waiting for complete packet ? */
+ case ST_BT_W4_DATA:
+ pr_debug("Complete pkt received");
+ validate_firmware_response(kim_gdata);
+ kim_gdata->rx_state = ST_W4_PACKET_TYPE;
+ kim_gdata->rx_skb = NULL;
+ continue;
+ /* Waiting for Bluetooth event header ? */
+ case ST_BT_W4_EVENT_HDR:
+ eh = (struct hci_event_hdr *)kim_gdata->
+ rx_skb->data;
+ pr_debug("Event header: evt 0x%2.2x"
+ "plen %d", eh->evt, eh->plen);
+ kim_check_data_len(kim_gdata, eh->plen);
+ continue;
+ } /* end of switch */
+ } /* end of if rx_state */
+ switch (*ptr) {
+ /* Bluetooth event packet? */
+ case HCI_EVENT_PKT:
+ pr_info("Event packet");
+ kim_gdata->rx_state = ST_BT_W4_EVENT_HDR;
+ kim_gdata->rx_count = HCI_EVENT_HDR_SIZE;
+ type = HCI_EVENT_PKT;
+ break;
+ default:
+ pr_info("unknown packet");
+ ptr++;
+ count--;
+ continue;
+ }
+ ptr++;
+ count--;
+ kim_gdata->rx_skb =
+ bt_skb_alloc(HCI_MAX_FRAME_SIZE, GFP_ATOMIC);
+ if (!kim_gdata->rx_skb) {
+ pr_err("can't allocate mem for new packet");
+ kim_gdata->rx_state = ST_W4_PACKET_TYPE;
+ kim_gdata->rx_count = 0;
+ return;
+ }
+ bt_cb(kim_gdata->rx_skb)->pkt_type = type;
+ }
+ pr_info("done %s", __func__);
+ return;
+}
+
+static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name)
+{
+ unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0;
+ const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 };
+
+ pr_debug("%s", __func__);
+
+ INIT_COMPLETION(kim_gdata->kim_rcvd);
+ if (4 != st_int_write(kim_gdata->core_data, read_ver_cmd, 4)) {
+ pr_err("kim: couldn't write 4 bytes");
+ return -1;
+ }
+
+ if (!wait_for_completion_timeout
+ (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) {
+ pr_err(" waiting for ver info- timed out ");
+ return -1;
+ }
+
+ version =
+ MAKEWORD(kim_gdata->resp_buffer[13],
+ kim_gdata->resp_buffer[14]);
+ chip = (version & 0x7C00) >> 10;
+ min_ver = (version & 0x007F);
+ maj_ver = (version & 0x0380) >> 7;
+
+ if (version & 0x8000)
+ maj_ver |= 0x0008;
+
+ sprintf(bts_scr_name, "TIInit_%d.%d.%d.bts", chip, maj_ver, min_ver);
+
+ /* to be accessed later via sysfs entry */
+ kim_gdata->version.full = version;
+ kim_gdata->version.chip = chip;
+ kim_gdata->version.maj_ver = maj_ver;
+ kim_gdata->version.min_ver = min_ver;
+
+ pr_info("%s", bts_scr_name);
+ return 0;
+}
+
+/**
+ * download_firmware -
+ * internal function which parses through the .bts firmware
+ * script file intreprets SEND, DELAY actions only as of now
+ */
+static long download_firmware(struct kim_data_s *kim_gdata)
+{
+ long err = 0;
+ long len = 0;
+ unsigned char *ptr = NULL;
+ unsigned char *action_ptr = NULL;
+ unsigned char bts_scr_name[30] = { 0 }; /* 30 char long bts scr name? */
+
+ err = read_local_version(kim_gdata, bts_scr_name);
+ if (err != 0) {
+ pr_err("kim: failed to read local ver");
+ return err;
+ }
+ err =
+ request_firmware(&kim_gdata->fw_entry, bts_scr_name,
+ &kim_gdata->kim_pdev->dev);
+ if (unlikely((err != 0) || (kim_gdata->fw_entry->data == NULL) ||
+ (kim_gdata->fw_entry->size == 0))) {
+ pr_err(" request_firmware failed(errno %ld) for %s", err,
+ bts_scr_name);
+ return -1;
+ }
+ ptr = (void *)kim_gdata->fw_entry->data;
+ len = kim_gdata->fw_entry->size;
+ /* bts_header to remove out magic number and
+ * version
+ */
+ ptr += sizeof(struct bts_header);
+ len -= sizeof(struct bts_header);
+
+ while (len > 0 && ptr) {
+ pr_debug(" action size %d, type %d ",
+ ((struct bts_action *)ptr)->size,
+ ((struct bts_action *)ptr)->type);
+
+ switch (((struct bts_action *)ptr)->type) {
+ case ACTION_SEND_COMMAND: /* action send */
+ action_ptr = &(((struct bts_action *)ptr)->data[0]);
+ if (unlikely
+ (((struct hci_command *)action_ptr)->opcode ==
+ 0xFF36)) {
+ /* ignore remote change
+ * baud rate HCI VS command */
+ pr_err
+ (" change remote baud"
+ " rate command in firmware");
+ break;
+ }
+
+ INIT_COMPLETION(kim_gdata->kim_rcvd);
+ err = st_int_write(kim_gdata->core_data,
+ ((struct bts_action_send *)action_ptr)->data,
+ ((struct bts_action *)ptr)->size);
+ if (unlikely(err < 0)) {
+ release_firmware(kim_gdata->fw_entry);
+ return -1;
+ }
+ if (!wait_for_completion_timeout
+ (&kim_gdata->kim_rcvd,
+ msecs_to_jiffies(CMD_RESP_TIME))) {
+ pr_err
+ (" response timeout during fw download ");
+ /* timed out */
+ release_firmware(kim_gdata->fw_entry);
+ return -1;
+ }
+ break;
+ case ACTION_DELAY: /* sleep */
+ pr_info("sleep command in scr");
+ action_ptr = &(((struct bts_action *)ptr)->data[0]);
+ mdelay(((struct bts_action_delay *)action_ptr)->msec);
+ break;
+ }
+ len =
+ len - (sizeof(struct bts_action) +
+ ((struct bts_action *)ptr)->size);
+ ptr =
+ ptr + sizeof(struct bts_action) +
+ ((struct bts_action *)ptr)->size;
+ }
+ /* fw download complete */
+ release_firmware(kim_gdata->fw_entry);
+ return 0;
+}
+
+/**********************************************************************/
+/* functions called from ST core */
+/* function to toggle the GPIO
+ * needs to know whether the GPIO is active high or active low
+ */
+void st_kim_chip_toggle(enum proto_type type, enum kim_gpio_state state)
+{
+ struct platform_device *kim_pdev;
+ struct kim_data_s *kim_gdata;
+ pr_info(" %s ", __func__);
+
+ kim_pdev = st_get_plat_device(0);
+ kim_gdata = dev_get_drvdata(&kim_pdev->dev);
+
+ if (kim_gdata->gpios[type] == -1) {
+ pr_info(" gpio not requested for protocol %s",
+ protocol_names[type]);
+ return;
+ }
+ switch (type) {
+ case ST_BT:
+ /*Do Nothing */
+ break;
+
+ case ST_FM:
+ if (state == KIM_GPIO_ACTIVE)
+ gpio_set_value(kim_gdata->gpios[ST_FM], GPIO_LOW);
+ else
+ gpio_set_value(kim_gdata->gpios[ST_FM], GPIO_HIGH);
+ break;
+
+ case ST_GPS:
+ if (state == KIM_GPIO_ACTIVE)
+ gpio_set_value(kim_gdata->gpios[ST_GPS], GPIO_HIGH);
+ else
+ gpio_set_value(kim_gdata->gpios[ST_GPS], GPIO_LOW);
+ break;
+
+ case ST_MAX:
+ default:
+ break;
+ }
+
+ return;
+}
+
+/* called from ST Core, when REG_IN_PROGRESS (registration in progress)
+ * can be because of
+ * 1. response to read local version
+ * 2. during send/recv's of firmware download
+ */
+void st_kim_recv(void *disc_data, const unsigned char *data, long count)
+{
+ struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
+ struct kim_data_s *kim_gdata = st_gdata->kim_data;
+
+ pr_info(" %s ", __func__);
+ /* copy to local buffer */
+ if (unlikely(data[4] == 0x01 && data[5] == 0x10 && data[0] == 0x04)) {
+ /* must be the read_ver_cmd */
+ memcpy(kim_gdata->resp_buffer, data, count);
+ complete_all(&kim_gdata->kim_rcvd);
+ return;
+ } else {
+ kim_int_recv(kim_gdata, data, count);
+ /* either completes or times out */
+ }
+ return;
+}
+
+/* to signal completion of line discipline installation
+ * called from ST Core, upon tty_open
+ */
+void st_kim_complete(void *kim_data)
+{
+ struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
+ complete(&kim_gdata->ldisc_installed);
+}
+
+/**
+ * st_kim_start - called from ST Core upon 1st registration
+ * This involves toggling the chip enable gpio, reading
+ * the firmware version from chip, forming the fw file name
+ * based on the chip version, requesting the fw, parsing it
+ * and perform download(send/recv).
+ */
+long st_kim_start(void *kim_data)
+{
+ long err = 0;
+ long retry = POR_RETRY_COUNT;
+ struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
+
+ pr_info(" %s", __func__);
+
+ do {
+ /* TODO: this is only because rfkill sub-system
+ * doesn't send events to user-space if the state
+ * isn't changed
+ */
+ rfkill_set_hw_state(kim_gdata->rfkill[ST_BT], 1);
+ /* Configure BT nShutdown to HIGH state */
+ gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW);
+ mdelay(5); /* FIXME: a proper toggle */
+ gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_HIGH);
+ mdelay(100);
+ /* re-initialize the completion */
+ INIT_COMPLETION(kim_gdata->ldisc_installed);
+#if 0 /* older way of signalling user-space UIM */
+ /* send signal to UIM */
+ err = kill_pid(find_get_pid(kim_gdata->uim_pid), SIGUSR2, 0);
+ if (err != 0) {
+ pr_info(" sending SIGUSR2 to uim failed %ld", err);
+ err = -1;
+ continue;
+ }
+#endif
+ /* unblock and send event to UIM via /dev/rfkill */
+ rfkill_set_hw_state(kim_gdata->rfkill[ST_BT], 0);
+ /* wait for ldisc to be installed */
+ err = wait_for_completion_timeout(&kim_gdata->ldisc_installed,
+ msecs_to_jiffies(LDISC_TIME));
+ if (!err) { /* timeout */
+ pr_err("line disc installation timed out ");
+ err = -1;
+ continue;
+ } else {
+ /* ldisc installed now */
+ pr_info(" line discipline installed ");
+ err = download_firmware(kim_gdata);
+ if (err != 0) {
+ pr_err("download firmware failed");
+ continue;
+ } else { /* on success don't retry */
+ break;
+ }
+ }
+ } while (retry--);
+ return err;
+}
+
+/**
+ * st_kim_stop - called from ST Core, on the last un-registration
+ * toggle low the chip enable gpio
+ */
+long st_kim_stop(void *kim_data)
+{
+ long err = 0;
+ struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
+
+ INIT_COMPLETION(kim_gdata->ldisc_installed);
+#if 0 /* older way of signalling user-space UIM */
+ /* send signal to UIM */
+ err = kill_pid(find_get_pid(kim_gdata->uim_pid), SIGUSR2, 1);
+ if (err != 0) {
+ pr_err("sending SIGUSR2 to uim failed %ld", err);
+ return -1;
+ }
+#endif
+ /* set BT rfkill to be blocked */
+ err = rfkill_set_hw_state(kim_gdata->rfkill[ST_BT], 1);
+
+ /* wait for ldisc to be un-installed */
+ err = wait_for_completion_timeout(&kim_gdata->ldisc_installed,
+ msecs_to_jiffies(LDISC_TIME));
+ if (!err) { /* timeout */
+ pr_err(" timed out waiting for ldisc to be un-installed");
+ return -1;
+ }
+
+ /* By default configure BT nShutdown to LOW state */
+ gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW);
+ mdelay(1);
+ gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_HIGH);
+ mdelay(1);
+ gpio_set_value(kim_gdata->gpios[ST_BT], GPIO_LOW);
+ return err;
+}
+
+/**********************************************************************/
+/* functions called from subsystems */
+/* called when debugfs entry is read from */
+
+static int show_version(struct seq_file *s, void *unused)
+{
+ struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private;
+ seq_printf(s, "%04X %d.%d.%d\n", kim_gdata->version.full,
+ kim_gdata->version.chip, kim_gdata->version.maj_ver,
+ kim_gdata->version.min_ver);
+ return 0;
+}
+
+static int show_list(struct seq_file *s, void *unused)
+{
+ struct kim_data_s *kim_gdata = (struct kim_data_s *)s->private;
+ kim_st_list_protocols(kim_gdata->core_data, s);
+ return 0;
+}
+
+/* function called from rfkill subsystem, when someone from
+ * user space would write 0/1 on the sysfs entry
+ * /sys/class/rfkill/rfkill0,1,3/state
+ */
+static int kim_toggle_radio(void *data, bool blocked)
+{
+ enum proto_type type = *((enum proto_type *)data);
+ pr_debug(" %s: %d ", __func__, type);
+
+ switch (type) {
+ case ST_BT:
+ /* do nothing */
+ break;
+ case ST_FM:
+ case ST_GPS:
+ if (blocked)
+ st_kim_chip_toggle(type, KIM_GPIO_INACTIVE);
+ else
+ st_kim_chip_toggle(type, KIM_GPIO_ACTIVE);
+ break;
+ case ST_MAX:
+ pr_err(" wrong proto type ");
+ break;
+ }
+ return 0;
+}
+
+/**
+ * st_kim_ref - reference the core's data
+ * This references the per-ST platform device in the arch/xx/
+ * board-xx.c file.
+ * This would enable multiple such platform devices to exist
+ * on a given platform
+ */
+void st_kim_ref(struct st_data_s **core_data, int id)
+{
+ struct platform_device *pdev;
+ struct kim_data_s *kim_gdata;
+ /* get kim_gdata reference from platform device */
+ pdev = st_get_plat_device(id);
+ kim_gdata = dev_get_drvdata(&pdev->dev);
+ *core_data = kim_gdata->core_data;
+}
+
+static int kim_version_open(struct inode *i, struct file *f)
+{
+ return single_open(f, show_version, i->i_private);
+}
+
+static int kim_list_open(struct inode *i, struct file *f)
+{
+ return single_open(f, show_list, i->i_private);
+}
+
+static const struct file_operations version_debugfs_fops = {
+ /* version info */
+ .open = kim_version_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+static const struct file_operations list_debugfs_fops = {
+ /* protocols info */
+ .open = kim_list_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/**********************************************************************/
+/* functions called from platform device driver subsystem
+ * need to have a relevant platform device entry in the platform's
+ * board-*.c file
+ */
+
+struct dentry *kim_debugfs_dir;
+static int kim_probe(struct platform_device *pdev)
+{
+ long status;
+ long proto;
+ long *gpios = pdev->dev.platform_data;
+ struct kim_data_s *kim_gdata;
+
+ if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) {
+ /* multiple devices could exist */
+ st_kim_devices[pdev->id] = pdev;
+ } else {
+ /* platform's sure about existance of 1 device */
+ st_kim_devices[0] = pdev;
+ }
+
+ kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_ATOMIC);
+ if (!kim_gdata) {
+ pr_err("no mem to allocate");
+ return -ENOMEM;
+ }
+ dev_set_drvdata(&pdev->dev, kim_gdata);
+
+ status = st_core_init(&kim_gdata->core_data);
+ if (status != 0) {
+ pr_err(" ST core init failed");
+ return -1;
+ }
+ /* refer to itself */
+ kim_gdata->core_data->kim_data = kim_gdata;
+
+ for (proto = 0; proto < ST_MAX; proto++) {
+ kim_gdata->gpios[proto] = gpios[proto];
+ pr_info(" %ld gpio to be requested", gpios[proto]);
+ }
+
+ for (proto = 0; (proto < ST_MAX) && (gpios[proto] != -1); proto++) {
+ /* Claim the Bluetooth/FM/GPIO
+ * nShutdown gpio from the system
+ */
+ status = gpio_request(gpios[proto], "kim");
+ if (unlikely(status)) {
+ pr_err(" gpio %ld request failed ", gpios[proto]);
+ proto -= 1;
+ while (proto >= 0) {
+ if (gpios[proto] != -1)
+ gpio_free(gpios[proto]);
+ }
+ return status;
+ }
+
+ /* Configure nShutdown GPIO as output=0 */
+ status =
+ gpio_direction_output(gpios[proto], 0);
+ if (unlikely(status)) {
+ pr_err(" unable to configure gpio %ld",
+ gpios[proto]);
+ proto -= 1;
+ while (proto >= 0) {
+ if (gpios[proto] != -1)
+ gpio_free(gpios[proto]);
+ }
+ return status;
+ }
+ }
+ /* get reference of pdev for request_firmware
+ */
+ kim_gdata->kim_pdev = pdev;
+ init_completion(&kim_gdata->kim_rcvd);
+ init_completion(&kim_gdata->ldisc_installed);
+
+ for (proto = 0; (proto < ST_MAX) && (gpios[proto] != -1); proto++) {
+ /* TODO: should all types be rfkill_type_bt ? */
+ kim_gdata->rf_protos[proto] = proto;
+ kim_gdata->rfkill[proto] = rfkill_alloc(protocol_names[proto],
+ &pdev->dev, RFKILL_TYPE_BLUETOOTH,
+ &kim_rfkill_ops, &kim_gdata->rf_protos[proto]);
+ if (kim_gdata->rfkill[proto] == NULL) {
+ pr_err("cannot create rfkill entry for gpio %ld",
+ gpios[proto]);
+ continue;
+ }
+ /* block upon creation */
+ rfkill_init_sw_state(kim_gdata->rfkill[proto], 1);
+ status = rfkill_register(kim_gdata->rfkill[proto]);
+ if (unlikely(status)) {
+ pr_err("rfkill registration failed for gpio %ld",
+ gpios[proto]);
+ rfkill_unregister(kim_gdata->rfkill[proto]);
+ continue;
+ }
+ pr_info("rfkill entry created for %ld", gpios[proto]);
+ }
+
+ kim_debugfs_dir = debugfs_create_dir("ti-st", NULL);
+ if (IS_ERR(kim_debugfs_dir)) {
+ pr_err(" debugfs entries creation failed ");
+ kim_debugfs_dir = NULL;
+ return -1;
+ }
+
+ debugfs_create_file("version", S_IRUGO, kim_debugfs_dir,
+ kim_gdata, &version_debugfs_fops);
+ debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir,
+ kim_gdata, &list_debugfs_fops);
+ pr_info(" debugfs entries created ");
+ return 0;
+}
+
+static int kim_remove(struct platform_device *pdev)
+{
+ /* free the GPIOs requested
+ */
+ long *gpios = pdev->dev.platform_data;
+ long proto;
+ struct kim_data_s *kim_gdata;
+
+ kim_gdata = dev_get_drvdata(&pdev->dev);
+
+ for (proto = 0; (proto < ST_MAX) && (gpios[proto] != -1); proto++) {
+ /* Claim the Bluetooth/FM/GPIO
+ * nShutdown gpio from the system
+ */
+ gpio_free(gpios[proto]);
+ rfkill_unregister(kim_gdata->rfkill[proto]);
+ rfkill_destroy(kim_gdata->rfkill[proto]);
+ kim_gdata->rfkill[proto] = NULL;
+ }
+ pr_info("kim: GPIO Freed");
+ debugfs_remove_recursive(kim_debugfs_dir);
+ kim_gdata->kim_pdev = NULL;
+ st_core_exit(kim_gdata->core_data);
+
+ kfree(kim_gdata);
+ kim_gdata = NULL;
+ return 0;
+}
+
+/**********************************************************************/
+/* entry point for ST KIM module, called in from ST Core */
+
+static int __init st_kim_init(void)
+{
+ long ret = 0;
+ ret = platform_driver_register(&kim_platform_driver);
+ if (ret != 0) {
+ pr_err("platform drv registration failed");
+ return -1;
+ }
+ return 0;
+}
+
+static void __exit st_kim_deinit(void)
+{
+ /* the following returns void */
+ platform_driver_unregister(&kim_platform_driver);
+}
+
+
+module_init(st_kim_init);
+module_exit(st_kim_deinit);
+MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>");
+MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips ");
+MODULE_LICENSE("GPL");
diff --git a/drivers/misc/ti-st/st_ll.c b/drivers/misc/ti-st/st_ll.c
new file mode 100644
index 000000000000..2bda8dea15b0
--- /dev/null
+++ b/drivers/misc/ti-st/st_ll.c
@@ -0,0 +1,150 @@
+/*
+ * Shared Transport driver
+ * HCI-LL module responsible for TI proprietary HCI_LL protocol
+ * 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
+ *
+ */
+
+#define pr_fmt(fmt) "(stll) :" fmt
+#include <linux/skbuff.h>
+#include <linux/module.h>
+#include <linux/ti_wilink_st.h>
+
+/**********************************************************************/
+/* internal functions */
+static void send_ll_cmd(struct st_data_s *st_data,
+ unsigned char cmd)
+{
+
+ pr_info("%s: writing %x", __func__, cmd);
+ st_int_write(st_data, &cmd, 1);
+ return;
+}
+
+static void ll_device_want_to_sleep(struct st_data_s *st_data)
+{
+ pr_debug("%s", __func__);
+ /* sanity check */
+ if (st_data->ll_state != ST_LL_AWAKE)
+ pr_err("ERR hcill: ST_LL_GO_TO_SLEEP_IND"
+ "in state %ld", st_data->ll_state);
+
+ send_ll_cmd(st_data, LL_SLEEP_ACK);
+ /* update state */
+ st_data->ll_state = ST_LL_ASLEEP;
+}
+
+static void ll_device_want_to_wakeup(struct st_data_s *st_data)
+{
+ /* diff actions in diff states */
+ switch (st_data->ll_state) {
+ case ST_LL_ASLEEP:
+ send_ll_cmd(st_data, LL_WAKE_UP_ACK); /* send wake_ack */
+ break;
+ case ST_LL_ASLEEP_TO_AWAKE:
+ /* duplicate wake_ind */
+ pr_err("duplicate wake_ind while waiting for Wake ack");
+ break;
+ case ST_LL_AWAKE:
+ /* duplicate wake_ind */
+ pr_err("duplicate wake_ind already AWAKE");
+ break;
+ case ST_LL_AWAKE_TO_ASLEEP:
+ /* duplicate wake_ind */
+ pr_err("duplicate wake_ind");
+ break;
+ }
+ /* update state */
+ st_data->ll_state = ST_LL_AWAKE;
+}
+
+/**********************************************************************/
+/* functions invoked by ST Core */
+
+/* called when ST Core wants to
+ * enable ST LL */
+void st_ll_enable(struct st_data_s *ll)
+{
+ ll->ll_state = ST_LL_AWAKE;
+}
+
+/* called when ST Core /local module wants to
+ * disable ST LL */
+void st_ll_disable(struct st_data_s *ll)
+{
+ ll->ll_state = ST_LL_INVALID;
+}
+
+/* called when ST Core wants to update the state */
+void st_ll_wakeup(struct st_data_s *ll)
+{
+ if (likely(ll->ll_state != ST_LL_AWAKE)) {
+ send_ll_cmd(ll, LL_WAKE_UP_IND); /* WAKE_IND */
+ ll->ll_state = ST_LL_ASLEEP_TO_AWAKE;
+ } else {
+ /* don't send the duplicate wake_indication */
+ pr_err(" Chip already AWAKE ");
+ }
+}
+
+/* called when ST Core wants the state */
+unsigned long st_ll_getstate(struct st_data_s *ll)
+{
+ pr_debug(" returning state %ld", ll->ll_state);
+ return ll->ll_state;
+}
+
+/* called from ST Core, when a PM related packet arrives */
+unsigned long st_ll_sleep_state(struct st_data_s *st_data,
+ unsigned char cmd)
+{
+ switch (cmd) {
+ case LL_SLEEP_IND: /* sleep ind */
+ pr_info("sleep indication recvd");
+ ll_device_want_to_sleep(st_data);
+ break;
+ case LL_SLEEP_ACK: /* sleep ack */
+ pr_err("sleep ack rcvd: host shouldn't");
+ break;
+ case LL_WAKE_UP_IND: /* wake ind */
+ pr_info("wake indication recvd");
+ ll_device_want_to_wakeup(st_data);
+ break;
+ case LL_WAKE_UP_ACK: /* wake ack */
+ pr_info("wake ack rcvd");
+ st_data->ll_state = ST_LL_AWAKE;
+ break;
+ default:
+ pr_err(" unknown input/state ");
+ return -1;
+ }
+ return 0;
+}
+
+/* Called from ST CORE to initialize ST LL */
+long st_ll_init(struct st_data_s *ll)
+{
+ /* set state to invalid */
+ ll->ll_state = ST_LL_INVALID;
+ return 0;
+}
+
+/* Called from ST CORE to de-initialize ST LL */
+long st_ll_deinit(struct st_data_s *ll)
+{
+ return 0;
+}