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Message-ID: <20241016094117.16654-1-brgl@bgdev.pl>
Date: Wed, 16 Oct 2024 11:41:17 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Derek Kiernan <derek.kiernan@....com>,
Dragan Cvetic <dragan.cvetic@....com>,
Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Tony Lindgren <tony@...mide.com>
Cc: linux-kernel@...r.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] misc: ti-st: st_kim: remove the driver
From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
This driver has only ever been used by the omap4-panda board file. This
file has been gone for over 10 years. Let it go.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
drivers/misc/Kconfig | 1 -
drivers/misc/Makefile | 1 -
drivers/misc/ti-st/Kconfig | 19 -
drivers/misc/ti-st/Makefile | 7 -
drivers/misc/ti-st/st_core.c | 918 -----------------------------------
drivers/misc/ti-st/st_kim.c | 839 --------------------------------
drivers/misc/ti-st/st_ll.c | 156 ------
7 files changed, 1941 deletions(-)
delete mode 100644 drivers/misc/ti-st/Kconfig
delete mode 100644 drivers/misc/ti-st/Makefile
delete mode 100644 drivers/misc/ti-st/st_core.c
delete mode 100644 drivers/misc/ti-st/st_kim.c
delete mode 100644 drivers/misc/ti-st/st_ll.c
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 3fe7e2a9bd29..0d46b8388331 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -613,7 +613,6 @@ config MARVELL_CN10K_DPI
source "drivers/misc/c2port/Kconfig"
source "drivers/misc/eeprom/Kconfig"
source "drivers/misc/cb710/Kconfig"
-source "drivers/misc/ti-st/Kconfig"
source "drivers/misc/lis3lv02d/Kconfig"
source "drivers/misc/altera-stapl/Kconfig"
source "drivers/misc/mei/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index a9f94525e181..d6e7c6d62db0 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -40,7 +40,6 @@ obj-y += eeprom/
obj-y += cb710/
obj-$(CONFIG_VMWARE_BALLOON) += vmw_balloon.o
obj-$(CONFIG_PCH_PHUB) += pch_phub.o
-obj-y += ti-st/
obj-y += lis3lv02d/
obj-$(CONFIG_ALTERA_STAPL) +=altera-stapl/
obj-$(CONFIG_INTEL_MEI) += mei/
diff --git a/drivers/misc/ti-st/Kconfig b/drivers/misc/ti-st/Kconfig
deleted file mode 100644
index 1503a6496f63..000000000000
--- a/drivers/misc/ti-st/Kconfig
+++ /dev/null
@@ -1,19 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# 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 NET && TTY
- depends on GPIOLIB || COMPILE_TEST
- 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
deleted file mode 100644
index 93393100952e..000000000000
--- a/drivers/misc/ti-st/Makefile
+++ /dev/null
@@ -1,7 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# 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
deleted file mode 100644
index b878431553ab..000000000000
--- a/drivers/misc/ti-st/st_core.c
+++ /dev/null
@@ -1,918 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * 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@...com>
- */
-
-#define pr_fmt(fmt) "(stc): " fmt
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/tty.h>
-
-#include <linux/seq_file.h>
-#include <linux/skbuff.h>
-
-#include <linux/ti_wilink_st.h>
-#include <linux/netdevice.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
- */
-static void (*st_recv)(void *disc_data, const u8 *ptr, size_t count);
-
-/********************************************************************/
-static void add_channel_to_table(struct st_data_s *st_gdata,
- struct st_proto_s *new_proto)
-{
- pr_info("%s: id %d\n", __func__, new_proto->chnl_id);
- /* list now has the channel id as index itself */
- st_gdata->list[new_proto->chnl_id] = new_proto;
- st_gdata->is_registered[new_proto->chnl_id] = true;
-}
-
-static void remove_channel_from_table(struct st_data_s *st_gdata,
- struct st_proto_s *proto)
-{
- pr_info("%s: id %d\n", __func__, proto->chnl_id);
-/* st_gdata->list[proto->chnl_id] = NULL; */
- st_gdata->is_registered[proto->chnl_id] = false;
-}
-
-/*
- * called from KIM during firmware download.
- *
- * This is a wrapper function to tty->ops->write_room.
- * It returns number of free space available in
- * uart tx buffer.
- */
-int st_get_uart_wr_room(struct st_data_s *st_gdata)
-{
- if (unlikely(st_gdata == NULL || st_gdata->tty == NULL)) {
- pr_err("tty unavailable to perform write");
- return -1;
- }
-
- return tty_write_room(st_gdata->tty);
-}
-
-/*
- * 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 -EINVAL;
- }
- 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
- */
-static void st_send_frame(unsigned char chnl_id, struct st_data_s *st_gdata)
-{
- pr_debug(" %s(prot:%d) ", __func__, chnl_id);
-
- if (unlikely
- (st_gdata == NULL || st_gdata->rx_skb == NULL
- || st_gdata->is_registered[chnl_id] == false)) {
- pr_err("chnl_id %d not registered, no data to send?",
- chnl_id);
- 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[chnl_id]->recv != NULL)) {
- if (unlikely
- (st_gdata->list[chnl_id]->recv
- (st_gdata->list[chnl_id]->priv_data, st_gdata->rx_skb)
- != 0)) {
- pr_err(" proto stack %d's ->recv failed", chnl_id);
- kfree_skb(st_gdata->rx_skb);
- return;
- }
- } else {
- pr_err(" proto stack %d's ->recv null", chnl_id);
- kfree_skb(st_gdata->rx_skb);
- }
- return;
-}
-
-/*
- * st_reg_complete - to call registration complete callbacks
- * of all protocol stack drivers
- * This function is being called with spin lock held, protocol drivers are
- * only expected to complete their waits and do nothing more than that.
- */
-static void st_reg_complete(struct st_data_s *st_gdata, int err)
-{
- unsigned char i = 0;
- pr_info(" %s ", __func__);
- for (i = 0; i < ST_MAX_CHANNELS; i++) {
- if (likely(st_gdata != NULL &&
- st_gdata->is_registered[i] == true &&
- st_gdata->list[i]->reg_complete_cb != NULL)) {
- st_gdata->list[i]->reg_complete_cb
- (st_gdata->list[i]->priv_data, err);
- pr_info("protocol %d's cb sent %d\n", i, err);
- if (err) { /* cleanup registered protocol */
- st_gdata->is_registered[i] = false;
- if (st_gdata->protos_registered)
- st_gdata->protos_registered--;
- }
- }
- }
-}
-
-static inline int st_check_data_len(struct st_data_s *st_gdata,
- unsigned char chnl_id, 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(chnl_id, 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_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;
- st_gdata->rx_chnl = 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.
- */
-static void st_int_recv(void *disc_data, const u8 *ptr, size_t count)
-{
- struct st_proto_s *proto;
- unsigned short payload_len = 0;
- int len = 0;
- unsigned char type = 0;
- unsigned char *plen;
- struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
- unsigned long flags;
-
- if (st_gdata == NULL) {
- pr_err(" received null from TTY ");
- return;
- }
-
- pr_debug("count %zu rx_state %ld"
- "rx_count %ld", count, st_gdata->rx_state,
- st_gdata->rx_count);
-
- spin_lock_irqsave(&st_gdata->lock, flags);
- /* Decode received bytes here */
- while (count) {
- if (st_gdata->rx_count) {
- len = min_t(unsigned int, st_gdata->rx_count, count);
- skb_put_data(st_gdata->rx_skb, 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_W4_DATA:
- pr_debug("Complete pkt received");
- /*
- * Ask ST CORE to forward
- * the packet to protocol driver
- */
- st_send_frame(st_gdata->rx_chnl, st_gdata);
-
- st_gdata->rx_state = ST_W4_PACKET_TYPE;
- st_gdata->rx_skb = NULL;
- continue;
- /* parse the header to know details */
- case ST_W4_HEADER:
- proto = st_gdata->list[st_gdata->rx_chnl];
- plen =
- &st_gdata->rx_skb->data
- [proto->offset_len_in_hdr];
- pr_debug("plen pointing to %x\n", *plen);
- if (proto->len_size == 1) /* 1 byte len field */
- payload_len = *(unsigned char *)plen;
- else if (proto->len_size == 2)
- payload_len =
- __le16_to_cpu(*(unsigned short *)plen);
- else
- pr_info("%s: invalid length "
- "for id %d\n",
- __func__, proto->chnl_id);
- st_check_data_len(st_gdata, proto->chnl_id,
- payload_len);
- pr_debug("off %d, pay len %d\n",
- proto->offset_len_in_hdr, payload_len);
- 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) {
- case LL_SLEEP_IND:
- case LL_SLEEP_ACK:
- case LL_WAKE_UP_IND:
- pr_debug("PM packet");
- /*
- * this takes appropriate action based on
- * sleep state received --
- */
- st_ll_sleep_state(st_gdata, *ptr);
- /*
- * if WAKEUP_IND collides copy from waitq to txq
- * and assume chip awake
- */
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- if (st_ll_getstate(st_gdata) == ST_LL_AWAKE)
- st_wakeup_ack(st_gdata, LL_WAKE_UP_ACK);
- spin_lock_irqsave(&st_gdata->lock, flags);
-
- ptr++;
- count--;
- continue;
- case LL_WAKE_UP_ACK:
- pr_debug("PM packet");
-
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- /* wake up ack received */
- st_wakeup_ack(st_gdata, *ptr);
- spin_lock_irqsave(&st_gdata->lock, flags);
-
- ptr++;
- count--;
- continue;
- /* Unknown packet? */
- default:
- type = *ptr;
-
- /*
- * Default case means non-HCILL packets,
- * possibilities are packets for:
- * (a) valid protocol - Supported Protocols within
- * the ST_MAX_CHANNELS.
- * (b) registered protocol - Checked by
- * "st_gdata->list[type] == NULL)" are supported
- * protocols only.
- * Rules out any invalid protocol and
- * unregistered protocols with channel ID < 16.
- */
-
- if ((type >= ST_MAX_CHANNELS) ||
- (st_gdata->list[type] == NULL)) {
- pr_err("chip/interface misbehavior: "
- "dropping frame starting "
- "with 0x%02x\n", type);
- goto done;
- }
-
- st_gdata->rx_skb = alloc_skb(
- st_gdata->list[type]->max_frame_size,
- GFP_ATOMIC);
- if (st_gdata->rx_skb == NULL) {
- pr_err("out of memory: dropping\n");
- goto done;
- }
-
- skb_reserve(st_gdata->rx_skb,
- st_gdata->list[type]->reserve);
- /* next 2 required for BT only */
- st_gdata->rx_skb->cb[0] = type; /*pkt_type*/
- st_gdata->rx_skb->cb[1] = 0; /*incoming*/
- st_gdata->rx_chnl = *ptr;
- st_gdata->rx_state = ST_W4_HEADER;
- st_gdata->rx_count = st_gdata->list[type]->hdr_len;
- pr_debug("rx_count %ld\n", st_gdata->rx_count);
- }
- ptr++;
- count--;
- }
-done:
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- 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.
- */
-static 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.
- */
-static 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_debug("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));
- dev_kfree_skb_irq(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));
- dev_kfree_skb_irq(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)
- */
-static void work_fn_write_wakeup(struct work_struct *work)
-{
- struct st_data_s *st_gdata = container_of(work, struct st_data_s,
- work_write_wakeup);
-
- st_tx_wakeup((void *)st_gdata);
-}
-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_debug("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;
- }
- dev_kfree_skb_irq(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->is_registered[0x04] == true ? 'R' : 'U',
- st_gdata->is_registered[0x08] == true ? 'R' : 'U',
- st_gdata->is_registered[0x09] == true ? '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);
- 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 -EINVAL;
- }
-
- if (new_proto->chnl_id >= ST_MAX_CHANNELS) {
- pr_err("chnl_id %d not supported", new_proto->chnl_id);
- return -EPROTONOSUPPORT;
- }
-
- if (st_gdata->is_registered[new_proto->chnl_id] == true) {
- pr_err("chnl_id %d already registered", new_proto->chnl_id);
- 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->chnl_id);
- /* fw download in progress */
-
- add_channel_to_table(st_gdata, 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(" chnl_id list empty :%d ", new_proto->chnl_id);
- set_bit(ST_REG_IN_PROGRESS, &st_gdata->st_state);
- st_recv = st_kim_recv;
-
- /* enable the ST LL - to set default chip state */
- st_ll_enable(st_gdata);
-
- /* release lock previously held - re-locked below */
- spin_unlock_irqrestore(&st_gdata->lock, flags);
-
- /*
- * 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 ");
- spin_lock_irqsave(&st_gdata->lock, flags);
- st_reg_complete(st_gdata, err);
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- clear_bit(ST_REG_PENDING, &st_gdata->st_state);
- }
- return -EINVAL;
- }
-
- spin_lock_irqsave(&st_gdata->lock, flags);
-
- 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->is_registered[new_proto->chnl_id] == true) {
- pr_err(" proto %d already registered ",
- new_proto->chnl_id);
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- return -EALREADY;
- }
-
- add_channel_to_table(st_gdata, 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 {
- add_channel_to_table(st_gdata, 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;
- }
-}
-EXPORT_SYMBOL_GPL(st_register);
-
-/*
- * to unregister a protocol -
- * to be called from protocol stack driver
- */
-long st_unregister(struct st_proto_s *proto)
-{
- long err = 0;
- unsigned long flags = 0;
- struct st_data_s *st_gdata;
-
- pr_debug("%s: %d ", __func__, proto->chnl_id);
-
- st_kim_ref(&st_gdata, 0);
- if (!st_gdata || proto->chnl_id >= ST_MAX_CHANNELS) {
- pr_err(" chnl_id %d not supported", proto->chnl_id);
- return -EPROTONOSUPPORT;
- }
-
- spin_lock_irqsave(&st_gdata->lock, flags);
-
- if (st_gdata->is_registered[proto->chnl_id] == false) {
- pr_err(" chnl_id %d not registered", proto->chnl_id);
- spin_unlock_irqrestore(&st_gdata->lock, flags);
- return -EPROTONOSUPPORT;
- }
-
- if (st_gdata->protos_registered)
- st_gdata->protos_registered--;
-
- remove_channel_from_table(st_gdata, proto);
- 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 chnl_ids unregistered ");
-
- /* stop traffic on tty */
- if (st_gdata->tty) {
- tty_ldisc_flush(st_gdata->tty);
- stop_tty(st_gdata->tty);
- }
-
- /* all chnl_ids 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;
- 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 -EINVAL;
- }
-
- 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)
-{
- 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 0;
-}
-
-static void st_tty_close(struct tty_struct *tty)
-{
- unsigned char i;
- unsigned long flags;
- 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_CHANNELS; i++) {
- if (st_gdata->is_registered[i] == true)
- pr_err("%d not un-registered", i);
- st_gdata->list[i] = NULL;
- st_gdata->is_registered[i] = false;
- }
- 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 u8 *data,
- const u8 *tty_flags, size_t 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);
-
- /*
- * schedule the internal wakeup instead of calling directly to
- * avoid lockup (port->lock needed in tty->ops->write is
- * already taken here
- */
- schedule_work(&st_gdata->work_write_wakeup);
-}
-
-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_driver_flush_buffer(tty);
- return;
-}
-
-static struct tty_ldisc_ops st_ldisc_ops = {
- .num = N_TI_WL,
- .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(&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 = -ENOMEM;
- goto err_unreg_ldisc;
- }
-
- /* 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);
- goto err_free_gdata;
- }
-
- INIT_WORK(&st_gdata->work_write_wakeup, work_fn_write_wakeup);
-
- *core_data = st_gdata;
- return 0;
-err_free_gdata:
- kfree(st_gdata);
-err_unreg_ldisc:
- tty_unregister_ldisc(&st_ldisc_ops);
- return err;
-}
-
-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 */
- tty_unregister_ldisc(&st_ldisc_ops);
- /* 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
deleted file mode 100644
index ff172cf4614d..000000000000
--- a/drivers/misc/ti-st/st_kim.c
+++ /dev/null
@@ -1,839 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * 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@...com>
- */
-
-#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/sysfs.h>
-#include <linux/tty.h>
-
-#include <linux/skbuff.h>
-#include <linux/ti_wilink_st.h>
-#include <linux/module.h>
-
-#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
- */
-static void validate_firmware_response(struct kim_data_s *kim_gdata)
-{
- struct sk_buff *skb = kim_gdata->rx_skb;
- if (!skb)
- return;
-
- /*
- * these magic numbers are the position in the response buffer which
- * allows us to distinguish whether the response is for the read
- * version info. command
- */
- if (skb->data[2] == 0x01 && skb->data[3] == 0x01 &&
- skb->data[4] == 0x10 && skb->data[5] == 0x00) {
- /* fw version response */
- memcpy(kim_gdata->resp_buffer,
- kim_gdata->rx_skb->data,
- kim_gdata->rx_skb->len);
- kim_gdata->rx_state = ST_W4_PACKET_TYPE;
- kim_gdata->rx_skb = NULL;
- kim_gdata->rx_count = 0;
- } else if (unlikely(skb->data[5] != 0)) {
- pr_err("no proper response during fw download");
- pr_err("data6 %x", skb->data[5]);
- kfree_skb(skb);
- 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_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
- */
-static void kim_int_recv(struct kim_data_s *kim_gdata, const u8 *ptr,
- size_t count)
-{
- int len = 0;
- unsigned char *plen;
-
- pr_debug("%s", __func__);
- /* Decode received bytes here */
- while (count) {
- if (kim_gdata->rx_count) {
- len = min_t(unsigned int, kim_gdata->rx_count, count);
- skb_put_data(kim_gdata->rx_skb, 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_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_W4_HEADER:
- plen =
- (unsigned char *)&kim_gdata->rx_skb->data[1];
- pr_debug("event hdr: plen 0x%02x\n", *plen);
- kim_check_data_len(kim_gdata, *plen);
- continue;
- } /* end of switch */
- } /* end of if rx_state */
- switch (*ptr) {
- /* Bluetooth event packet? */
- case 0x04:
- kim_gdata->rx_state = ST_W4_HEADER;
- kim_gdata->rx_count = 2;
- break;
- default:
- pr_info("unknown packet");
- ptr++;
- count--;
- continue;
- }
- ptr++;
- count--;
- kim_gdata->rx_skb =
- alloc_skb(1024+8, 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;
- }
- skb_reserve(kim_gdata->rx_skb, 8);
- kim_gdata->rx_skb->cb[0] = 4;
- kim_gdata->rx_skb->cb[1] = 0;
-
- }
- 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;
- static const char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 };
- long time_left;
-
- pr_debug("%s", __func__);
-
- reinit_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 -EIO;
- }
-
- time_left = wait_for_completion_interruptible_timeout(
- &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME));
- if (time_left <= 0) {
- pr_err(" waiting for ver info- timed out or received signal");
- return time_left ? -ERESTARTSYS : -ETIMEDOUT;
- }
- reinit_completion(&kim_gdata->kim_rcvd);
- /*
- * the positions 12 & 13 in the response buffer provide with the
- * chip, major & minor numbers
- */
-
- version =
- MAKEWORD(kim_gdata->resp_buffer[12],
- kim_gdata->resp_buffer[13]);
- chip = (version & 0x7C00) >> 10;
- min_ver = (version & 0x007F);
- maj_ver = (version & 0x0380) >> 7;
-
- if (version & 0x8000)
- maj_ver |= 0x0008;
-
- sprintf(bts_scr_name, "ti-connectivity/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;
-}
-
-static void skip_change_remote_baud(unsigned char **ptr, long *len)
-{
- unsigned char *nxt_action, *cur_action;
- cur_action = *ptr;
-
- nxt_action = cur_action + sizeof(struct bts_action) +
- ((struct bts_action *) cur_action)->size;
-
- if (((struct bts_action *) nxt_action)->type != ACTION_WAIT_EVENT) {
- pr_err("invalid action after change remote baud command");
- } else {
- *ptr = *ptr + sizeof(struct bts_action) +
- ((struct bts_action *)cur_action)->size;
- *len = *len - (sizeof(struct bts_action) +
- ((struct bts_action *)cur_action)->size);
- /* warn user on not commenting these in firmware */
- pr_warn("skipping the wait event of change remote baud");
- }
-}
-
-/*
- * 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[40] = { 0 }; /* 40 char long bts scr name? */
- int wr_room_space;
- int cmd_size;
- unsigned long timeout;
-
- 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 -EINVAL;
- }
- 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 */
- pr_debug("S");
- 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_warn("change remote baud"
- " rate command in firmware");
- skip_change_remote_baud(&ptr, &len);
- break;
- }
- /*
- * Make sure we have enough free space in uart
- * tx buffer to write current firmware command
- */
- cmd_size = ((struct bts_action *)ptr)->size;
- timeout = jiffies + msecs_to_jiffies(CMD_WR_TIME);
- do {
- wr_room_space =
- st_get_uart_wr_room(kim_gdata->core_data);
- if (wr_room_space < 0) {
- pr_err("Unable to get free "
- "space info from uart tx buffer");
- release_firmware(kim_gdata->fw_entry);
- return wr_room_space;
- }
- mdelay(1); /* wait 1ms before checking room */
- } while ((wr_room_space < cmd_size) &&
- time_before(jiffies, timeout));
-
- /* Timeout happened ? */
- if (time_after_eq(jiffies, timeout)) {
- pr_err("Timeout while waiting for free "
- "free space in uart tx buffer");
- release_firmware(kim_gdata->fw_entry);
- return -ETIMEDOUT;
- }
- /*
- * reinit completion before sending for the
- * relevant wait
- */
- reinit_completion(&kim_gdata->kim_rcvd);
-
- /*
- * Free space found in uart buffer, call st_int_write
- * to send current firmware command to the uart tx
- * buffer.
- */
- 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 err;
- }
- /*
- * Check number of bytes written to the uart tx buffer
- * and requested command write size
- */
- if (err != cmd_size) {
- pr_err("Number of bytes written to uart "
- "tx buffer are not matching with "
- "requested cmd write size");
- release_firmware(kim_gdata->fw_entry);
- return -EIO;
- }
- break;
- case ACTION_WAIT_EVENT: /* wait */
- pr_debug("W");
- err = wait_for_completion_interruptible_timeout(
- &kim_gdata->kim_rcvd,
- msecs_to_jiffies(CMD_RESP_TIME));
- if (err <= 0) {
- pr_err("response timeout/signaled during fw download ");
- /* timed out */
- release_firmware(kim_gdata->fw_entry);
- return err ? -ERESTARTSYS : -ETIMEDOUT;
- }
- reinit_completion(&kim_gdata->kim_rcvd);
- 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 */
-/* 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 u8 *data, size_t count)
-{
- struct st_data_s *st_gdata = (struct st_data_s *)disc_data;
- struct kim_data_s *kim_gdata = st_gdata->kim_data;
-
- /*
- * proceed to gather all data and distinguish read fw version response
- * from other fw responses when data gathering is complete
- */
- kim_int_recv(kim_gdata, data, count);
- 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 ti_st_plat_data *pdata;
- struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
-
- pr_info(" %s", __func__);
- pdata = kim_gdata->kim_pdev->dev.platform_data;
-
- do {
- /* platform specific enabling code here */
- if (pdata->chip_enable)
- pdata->chip_enable(kim_gdata);
-
- /* Configure BT nShutdown to HIGH state */
- gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
- mdelay(5); /* FIXME: a proper toggle */
- gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
- mdelay(100);
- /* re-initialize the completion */
- reinit_completion(&kim_gdata->ldisc_installed);
- /* send notification to UIM */
- kim_gdata->ldisc_install = 1;
- pr_info("ldisc_install = 1");
- sysfs_notify(&kim_gdata->kim_pdev->dev.kobj,
- NULL, "install");
- /* wait for ldisc to be installed */
- err = wait_for_completion_interruptible_timeout(
- &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
- if (!err) {
- /*
- * ldisc installation timeout,
- * flush uart, power cycle BT_EN
- */
- pr_err("ldisc installation timeout");
- err = st_kim_stop(kim_gdata);
- continue;
- } else {
- /* ldisc installed now */
- pr_info("line discipline installed");
- err = download_firmware(kim_gdata);
- if (err != 0) {
- /*
- * ldisc installed but fw download failed,
- * flush uart & power cycle BT_EN
- */
- pr_err("download firmware failed");
- err = st_kim_stop(kim_gdata);
- continue;
- } else { /* on success don't retry */
- break;
- }
- }
- } while (retry--);
- return err;
-}
-
-/*
- * st_kim_stop - stop communication with chip.
- * This can be called from ST Core/KIM, on the-
- * (a) last un-register when chip need not be powered there-after,
- * (b) upon failure to either install ldisc or download firmware.
- * The function is responsible to (a) notify UIM about un-installation,
- * (b) flush UART if the ldisc was installed.
- * (c) reset BT_EN - pull down nshutdown at the end.
- * (d) invoke platform's chip disabling routine.
- */
-long st_kim_stop(void *kim_data)
-{
- long err = 0;
- struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data;
- struct ti_st_plat_data *pdata =
- kim_gdata->kim_pdev->dev.platform_data;
- struct tty_struct *tty = kim_gdata->core_data->tty;
-
- reinit_completion(&kim_gdata->ldisc_installed);
-
- if (tty) { /* can be called before ldisc is installed */
- /* Flush any pending characters in the driver and discipline. */
- tty_ldisc_flush(tty);
- tty_driver_flush_buffer(tty);
- }
-
- /* send uninstall notification to UIM */
- pr_info("ldisc_install = 0");
- kim_gdata->ldisc_install = 0;
- sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install");
-
- /* wait for ldisc to be un-installed */
- err = wait_for_completion_interruptible_timeout(
- &kim_gdata->ldisc_installed, msecs_to_jiffies(LDISC_TIME));
- if (!err) { /* timeout */
- pr_err(" timed out waiting for ldisc to be un-installed");
- err = -ETIMEDOUT;
- }
-
- /* By default configure BT nShutdown to LOW state */
- gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
- mdelay(1);
- gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH);
- mdelay(1);
- gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW);
-
- /* platform specific disable */
- if (pdata->chip_disable)
- pdata->chip_disable(kim_gdata);
- return err;
-}
-
-/**********************************************************************/
-/* functions called from subsystems */
-/* called when debugfs entry is read from */
-
-static int version_show(struct seq_file *s, void *unused)
-{
- struct kim_data_s *kim_gdata = 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 list_show(struct seq_file *s, void *unused)
-{
- struct kim_data_s *kim_gdata = s->private;
- kim_st_list_protocols(kim_gdata->core_data, s);
- return 0;
-}
-
-static ssize_t show_install(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", kim_data->ldisc_install);
-}
-
-#ifdef DEBUG
-static ssize_t store_dev_name(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- pr_debug("storing dev name >%s<", buf);
- strscpy(kim_data->dev_name, buf, sizeof(kim_data->dev_name));
- pr_debug("stored dev name >%s<", kim_data->dev_name);
- return count;
-}
-
-static ssize_t store_baud_rate(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- pr_debug("storing baud rate >%s<", buf);
- sscanf(buf, "%ld", &kim_data->baud_rate);
- pr_debug("stored baud rate >%ld<", kim_data->baud_rate);
- return count;
-}
-#endif /* if DEBUG */
-
-static ssize_t show_dev_name(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- return sprintf(buf, "%s\n", kim_data->dev_name);
-}
-
-static ssize_t show_baud_rate(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", kim_data->baud_rate);
-}
-
-static ssize_t show_flow_cntrl(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct kim_data_s *kim_data = dev_get_drvdata(dev);
- return sprintf(buf, "%d\n", kim_data->flow_cntrl);
-}
-
-/* structures specific for sysfs entries */
-static struct kobj_attribute ldisc_install =
-__ATTR(install, 0444, (void *)show_install, NULL);
-
-static struct kobj_attribute uart_dev_name =
-#ifdef DEBUG /* TODO: move this to debug-fs if possible */
-__ATTR(dev_name, 0644, (void *)show_dev_name, (void *)store_dev_name);
-#else
-__ATTR(dev_name, 0444, (void *)show_dev_name, NULL);
-#endif
-
-static struct kobj_attribute uart_baud_rate =
-#ifdef DEBUG /* TODO: move to debugfs */
-__ATTR(baud_rate, 0644, (void *)show_baud_rate, (void *)store_baud_rate);
-#else
-__ATTR(baud_rate, 0444, (void *)show_baud_rate, NULL);
-#endif
-
-static struct kobj_attribute uart_flow_cntrl =
-__ATTR(flow_cntrl, 0444, (void *)show_flow_cntrl, NULL);
-
-static struct attribute *uim_attrs[] = {
- &ldisc_install.attr,
- &uart_dev_name.attr,
- &uart_baud_rate.attr,
- &uart_flow_cntrl.attr,
- NULL,
-};
-
-static const struct attribute_group uim_attr_grp = {
- .attrs = uim_attrs,
-};
-
-/*
- * 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);
- if (!pdev)
- goto err;
- kim_gdata = platform_get_drvdata(pdev);
- if (!kim_gdata)
- goto err;
-
- *core_data = kim_gdata->core_data;
- return;
-err:
- *core_data = NULL;
-}
-
-DEFINE_SHOW_ATTRIBUTE(version);
-DEFINE_SHOW_ATTRIBUTE(list);
-
-/**********************************************************************/
-/* functions called from platform device driver subsystem
- * need to have a relevant platform device entry in the platform's
- * board-*.c file
- */
-
-static struct dentry *kim_debugfs_dir;
-static int kim_probe(struct platform_device *pdev)
-{
- struct kim_data_s *kim_gdata;
- struct ti_st_plat_data *pdata = pdev->dev.platform_data;
- int err;
-
- if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) {
- /* multiple devices could exist */
- st_kim_devices[pdev->id] = pdev;
- } else {
- /* platform's sure about existence of 1 device */
- st_kim_devices[0] = pdev;
- }
-
- kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_KERNEL);
- if (!kim_gdata) {
- pr_err("no mem to allocate");
- return -ENOMEM;
- }
- platform_set_drvdata(pdev, kim_gdata);
-
- err = st_core_init(&kim_gdata->core_data);
- if (err != 0) {
- pr_err(" ST core init failed");
- err = -EIO;
- goto err_core_init;
- }
- /* refer to itself */
- kim_gdata->core_data->kim_data = kim_gdata;
-
- /* Claim the chip enable nShutdown gpio from the system */
- kim_gdata->nshutdown = pdata->nshutdown_gpio;
- err = gpio_request(kim_gdata->nshutdown, "kim");
- if (unlikely(err)) {
- pr_err(" gpio %d request failed ", kim_gdata->nshutdown);
- goto err_sysfs_group;
- }
-
- /* Configure nShutdown GPIO as output=0 */
- err = gpio_direction_output(kim_gdata->nshutdown, 0);
- if (unlikely(err)) {
- pr_err(" unable to configure gpio %d", kim_gdata->nshutdown);
- goto err_sysfs_group;
- }
- /* get reference of pdev for request_firmware */
- kim_gdata->kim_pdev = pdev;
- init_completion(&kim_gdata->kim_rcvd);
- init_completion(&kim_gdata->ldisc_installed);
-
- err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp);
- if (err) {
- pr_err("failed to create sysfs entries");
- goto err_sysfs_group;
- }
-
- /* copying platform data */
- strscpy(kim_gdata->dev_name, pdata->dev_name,
- sizeof(kim_gdata->dev_name));
- kim_gdata->flow_cntrl = pdata->flow_cntrl;
- kim_gdata->baud_rate = pdata->baud_rate;
- pr_info("sysfs entries created\n");
-
- kim_debugfs_dir = debugfs_create_dir("ti-st", NULL);
-
- debugfs_create_file("version", S_IRUGO, kim_debugfs_dir,
- kim_gdata, &version_fops);
- debugfs_create_file("protocols", S_IRUGO, kim_debugfs_dir,
- kim_gdata, &list_fops);
- return 0;
-
-err_sysfs_group:
- st_core_exit(kim_gdata->core_data);
-
-err_core_init:
- kfree(kim_gdata);
-
- return err;
-}
-
-static void kim_remove(struct platform_device *pdev)
-{
- /* free the GPIOs requested */
- struct ti_st_plat_data *pdata = pdev->dev.platform_data;
- struct kim_data_s *kim_gdata;
-
- kim_gdata = platform_get_drvdata(pdev);
-
- /*
- * Free the Bluetooth/FM/GPIO
- * nShutdown gpio from the system
- */
- gpio_free(pdata->nshutdown_gpio);
- pr_info("nshutdown GPIO Freed");
-
- debugfs_remove_recursive(kim_debugfs_dir);
- sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp);
- pr_info("sysfs entries removed");
-
- kim_gdata->kim_pdev = NULL;
- st_core_exit(kim_gdata->core_data);
-
- kfree(kim_gdata);
- kim_gdata = NULL;
-}
-
-static int kim_suspend(struct platform_device *pdev, pm_message_t state)
-{
- struct ti_st_plat_data *pdata = pdev->dev.platform_data;
-
- if (pdata->suspend)
- return pdata->suspend(pdev, state);
-
- return 0;
-}
-
-static int kim_resume(struct platform_device *pdev)
-{
- struct ti_st_plat_data *pdata = pdev->dev.platform_data;
-
- if (pdata->resume)
- return pdata->resume(pdev);
-
- return 0;
-}
-
-/**********************************************************************/
-/* entry point for ST KIM module, called in from ST Core */
-static struct platform_driver kim_platform_driver = {
- .probe = kim_probe,
- .remove_new = kim_remove,
- .suspend = kim_suspend,
- .resume = kim_resume,
- .driver = {
- .name = "kim",
- },
-};
-
-module_platform_driver(kim_platform_driver);
-
-MODULE_AUTHOR("Pavan Savoy <pavan_savoy@...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
deleted file mode 100644
index 07406140d277..000000000000
--- a/drivers/misc/ti-st/st_ll.c
+++ /dev/null
@@ -1,156 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Shared Transport driver
- * HCI-LL module responsible for TI proprietary HCI_LL protocol
- * Copyright (C) 2009-2010 Texas Instruments
- * Author: Pavan Savoy <pavan_savoy@...com>
- */
-
-#define pr_fmt(fmt) "(stll) :" fmt
-#include <linux/skbuff.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/ti_wilink_st.h>
-
-/**********************************************************************/
-/* internal functions */
-static void send_ll_cmd(struct st_data_s *st_data,
- unsigned char cmd)
-{
-
- pr_debug("%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)
-{
- struct kim_data_s *kim_data;
- struct ti_st_plat_data *pdata;
-
- 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;
-
- /* communicate to platform about chip asleep */
- kim_data = st_data->kim_data;
- pdata = kim_data->kim_pdev->dev.platform_data;
- if (pdata->chip_asleep)
- pdata->chip_asleep(NULL);
-}
-
-static void ll_device_want_to_wakeup(struct st_data_s *st_data)
-{
- struct kim_data_s *kim_data;
- struct ti_st_plat_data *pdata;
-
- /* 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;
-
- /* communicate to platform about chip wakeup */
- kim_data = st_data->kim_data;
- pdata = kim_data->kim_pdev->dev.platform_data;
- if (pdata->chip_awake)
- pdata->chip_awake(NULL);
-}
-
-/**********************************************************************/
-/* 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_debug("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_debug("wake indication recvd");
- ll_device_want_to_wakeup(st_data);
- break;
- case LL_WAKE_UP_ACK: /* wake ack */
- pr_debug("wake ack rcvd");
- st_data->ll_state = ST_LL_AWAKE;
- break;
- default:
- pr_err(" unknown input/state ");
- return -EINVAL;
- }
- 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;
-}
--
2.43.0
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