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Date: Fri, 24 Sep 2010 15:49:28 +0200
From: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
To: linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
linus.walleij@...ricsson.com, Pavan Savoy <pavan_savoy@...y.com>
Subject: [PATCH 3/6] This patch adds support for the ST-Ericsson STLC2690
This patch adds support for the ST-Ericsson STLC2690 connectivity
controller. This patch registers into the CG2900 framework.
It handles chip startup and shutdown together with firmware download.
Signed-off-by: Par-Gunnar Hjalmdahl <par-gunnar.p.hjalmdahl@...ricsson.com>
---
drivers/mfd/Kconfig | 6 +
drivers/mfd/cg2900/Makefile | 1 +
drivers/mfd/cg2900/stlc2690_chip.c | 1105 ++++++++++++++++++++++++++++++++++++
drivers/mfd/cg2900/stlc2690_chip.h | 37 ++
4 files changed, 1149 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/cg2900/stlc2690_chip.c
create mode 100644 drivers/mfd/cg2900/stlc2690_chip.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f1fb334..d47a253 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -590,6 +590,12 @@ config MFD_CG2900_CHIP
help
Support for ST-Ericsson CG2900 Connectivity Controller
+config MFD_STLC2690_CHIP
+ tristate "Support STLC2690 Connectivity controller"
+ depends on MFD_CG2900
+ help
+ Support for ST-Ericsson STLC2690 Connectivity Controller
+
endif # MFD_SUPPORT
menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/cg2900/Makefile b/drivers/mfd/cg2900/Makefile
index b49bf6b..3b6e442 100644
--- a/drivers/mfd/cg2900/Makefile
+++ b/drivers/mfd/cg2900/Makefile
@@ -7,3 +7,4 @@ cg2900-objs := cg2900_core.o
cg2900_char_devices.o
export-objs := cg2900_core.o
obj-$(CONFIG_MFD_CG2900_CHIP) += cg2900_chip.o
+obj-$(CONFIG_MFD_STLC2690_CHIP) += stlc2690_chip.o
diff --git a/drivers/mfd/cg2900/stlc2690_chip.c
b/drivers/mfd/cg2900/stlc2690_chip.c
new file mode 100644
index 0000000..dc2d802
--- /dev/null
+++ b/drivers/mfd/cg2900/stlc2690_chip.c
@@ -0,0 +1,1105 @@
+/*
+ * drivers/mfd/cg2900/ste_stlc2690.c
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson STLC2690 BT/FM controller.
+ */
+
+#include <linux/module.h>
+#include <linux/workqueue.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/skbuff.h>
+#include <linux/gfp.h>
+#include <linux/stat.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/firmware.h>
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <asm/byteorder.h>
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci.h>
+
+#include <linux/mfd/cg2900.h>
+#include <mach/cg2900_devices.h>
+#include "hci_defines.h"
+#include "stlc2690_chip.h"
+#include "cg2900_core.h"
+#include "cg2900_debug.h"
+
+#define LINE_BUFFER_LENGTH 128
+#define FILENAME_MAX 128
+
+#define WQ_NAME "stlc2690_wq"
+#define PATCH_INFO_FILE "cg2900_patch_info.fw"
+#define FACTORY_SETTINGS_INFO_FILE "cg2900_settings_info.fw"
+
+/* Supported chips */
+#define SUPP_MANUFACTURER 0x30
+#define SUPP_REVISION_MIN 0x0500
+#define SUPP_REVISION_MAX 0x06FF
+
+/* Size of file chunk ID */
+#define FILE_CHUNK_ID_SIZE 1
+#define VS_SEND_FILE_CHUNK_ID_POS 4
+#define BT_CMD_LEN_POS 3
+
+/* State setting macros */
+#define SET_BOOT_STATE(__new_state) \
+ CG2900_SET_STATE("boot_state", stlc2690_info->boot_state, __new_state)
+#define SET_FILE_LOAD_STATE(__new_state) \
+ CG2900_SET_STATE("file_load_state", stlc2690_info->file_load_state, \
+ __new_state)
+#define SET_DOWNLOAD_STATE(__new_state) \
+ CG2900_SET_STATE("download_state", stlc2690_info->download_state, \
+ __new_state)
+
+/** CHANNEL_BT_CMD - Bluetooth HCI H:4 channel
+ * for Bluetooth commands in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_CMD 0x01
+
+/** CHANNEL_BT_ACL - Bluetooth HCI H:4 channel
+ * for Bluetooth ACL data in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_ACL 0x02
+
+/** CHANNEL_BT_EVT - Bluetooth HCI H:4 channel
+ * for Bluetooth events in the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_BT_EVT 0x04
+
+/** CHANNEL_HCI_LOGGER - Bluetooth HCI H:4 channel
+ * for logging all transmitted H4 packets (on all channels).
+ */
+#define CHANNEL_HCI_LOGGER 0xFA
+
+/** CHANNEL_US_CTRL - Bluetooth HCI H:4 channel
+ * for user space control of the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_US_CTRL 0xFC
+
+/** CHANNEL_CORE - Bluetooth HCI H:4 channel
+ * for user space control of the ST-Ericsson connectivity controller.
+ */
+#define CHANNEL_CORE 0xFD
+
+/**
+ * struct stlc2690_work_struct - Work structure for CG2900 Core module.
+ * @work: Work structure.
+ * @skb: Data packet.
+ * @data: Private data for user.
+ *
+ * This structure is used to pack work for work queue.
+ */
+struct stlc2690_work_struct {
+ struct work_struct work;
+ struct sk_buff *skb;
+ void *data;
+};
+
+/**
+ * enum boot_state - BOOT-state for CG2900 Core.
+ * @BOOT_NOT_STARTED: Boot has not yet started.
+ * @BOOT_SEND_BD_ADDRESS: VS Store In FS command with BD address
+ * has been sent.
+ * @BOOT_GET_FILES_TO_LOAD: CG2900 Core is retreiving file to load.
+ * @BOOT_DOWNLOAD_PATCH: CG2900 Core is downloading patches.
+ * @BOOT_ACTIVATE_PATCHES_AND_SETTINGS: CG2900 Core is activating patches and
+ * settings.
+ * @BOOT_READY: CG2900 Core boot is ready.
+ * @BOOT_FAILED: CG2900 Core boot failed.
+ */
+enum boot_state {
+ BOOT_NOT_STARTED,
+ BOOT_SEND_BD_ADDRESS,
+ BOOT_GET_FILES_TO_LOAD,
+ BOOT_DOWNLOAD_PATCH,
+ BOOT_ACTIVATE_PATCHES_AND_SETTINGS,
+ BOOT_READY,
+ BOOT_FAILED
+};
+
+/**
+ * enum file_load_state - BOOT_FILE_LOAD-state for CG2900 Core.
+ * @FILE_LOAD_GET_PATCH: Loading patches.
+ * @FILE_LOAD_GET_STATIC_SETTINGS: Loading static settings.
+ * @FILE_LOAD_NO_MORE_FILES: No more files to load.
+ * @FILE_LOAD_FAILED: File loading failed.
+ */
+enum file_load_state {
+ FILE_LOAD_GET_PATCH,
+ FILE_LOAD_GET_STATIC_SETTINGS,
+ FILE_LOAD_NO_MORE_FILES,
+ FILE_LOAD_FAILED
+};
+
+/**
+ * enum download_state - BOOT_DOWNLOAD state.
+ * @DOWNLOAD_PENDING: Download in progress.
+ * @DOWNLOAD_SUCCESS: Download successfully finished.
+ * @DOWNLOAD_FAILED: Downloading failed.
+ */
+enum download_state {
+ DOWNLOAD_PENDING,
+ DOWNLOAD_SUCCESS,
+ DOWNLOAD_FAILED
+};
+
+/**
+ * struct stlc2690_device_id - Structure for connecting H4 channel to user.
+ * @name: Name of device.
+ * @h4_channel: HCI H:4 channel used by this device.
+ */
+struct stlc2690_device_id {
+ char *name;
+ int h4_channel;
+};
+
+/**
+ * struct stlc2690_info - Main info structure for STLC2690.
+ * @patch_file_name: Stores patch file name.
+ * @settings_file_name: Stores settings file name.
+ * @fw_file: Stores firmware file (patch or settings).
+ * @file_offset: Current read offset in firmware file.
+ * @chunk_id: Stores current chunk ID of write file operations.
+ * @boot_state: Current BOOT-state of STLC2690.
+ * @file_load_state: Current BOOT_FILE_LOAD-state of STLC2690.
+ * @download_state: Current BOOT_DOWNLOAD-state of STLC2690.
+ * @wq: STLC2690 workqueue.
+ * @chip_dev: Chip info.
+ */
+struct stlc2690_info {
+ char *patch_file_name;
+ char *settings_file_name;
+ const struct firmware *fw_file;
+ int file_offset;
+ u8 chunk_id;
+ enum boot_state boot_state;
+ enum file_load_state file_load_state;
+ enum download_state download_state;
+ struct workqueue_struct *wq;
+ struct cg2900_chip_dev chip_dev;
+};
+
+static struct stlc2690_info *stlc2690_info;
+
+#define NBR_OF_DEVS 6
+
+/*
+ * stlc2690_channels() - Array containing available H4 channels for
the STLC2690
+ * ST-Ericsson Connectivity controller.
+ */
+struct stlc2690_device_id stlc2690_channels[NBR_OF_DEVS] = {
+ {CG2900_BT_CMD, CHANNEL_BT_CMD},
+ {CG2900_BT_ACL, CHANNEL_BT_ACL},
+ {CG2900_BT_EVT, CHANNEL_BT_EVT},
+ {CG2900_HCI_LOGGER, CHANNEL_HCI_LOGGER},
+ {CG2900_US_CTRL, CHANNEL_US_CTRL},
+ {CG2900_CORE, CHANNEL_CORE}
+};
+
+/*
+ * Internal functions
+ */
+
+/**
+ * create_and_send_bt_cmd() - Copy and send sk_buffer.
+ * @data: Data to send.
+ * @length: Length in bytes of data.
+ *
+ * The create_and_send_bt_cmd() function allocate sk_buffer, copy supplied data
+ * to it, and send the sk_buffer to CG2900 Core.
+ * Note that the data must contain the H:4 header.
+ */
+static void create_and_send_bt_cmd(void *data, int length)
+{
+ struct sk_buff *skb;
+ struct cg2900_hci_logger_config *logger_config;
+ int err;
+
+ skb = alloc_skb(length, GFP_ATOMIC);
+ if (!skb) {
+ CG2900_ERR("Couldn't allocate sk_buff with length %d", length);
+ return;
+ }
+
+ memcpy(skb_put(skb, length), data, length);
+ skb->data[0] = CHANNEL_BT_CMD;
+
+ logger_config = cg2900_get_hci_logger_config();
+ if (logger_config)
+ err = cg2900_send_to_chip(skb, logger_config->bt_cmd_enable);
+ else
+ err = cg2900_send_to_chip(skb, false);
+ if (err) {
+ CG2900_ERR("Failed to transmit to chip (%d)", err);
+ kfree_skb(skb);
+ }
+}
+
+/**
+ * send_bd_address() - Send HCI VS command with BD address to the chip.
+ */
+static void send_bd_address(void)
+{
+ struct bt_vs_store_in_fs_cmd *cmd;
+ struct hci_command_hdr *hdr;
+ u8 *tmp;
+ u8 *data;
+ u8 plen = sizeof(*cmd) + BT_BDADDR_SIZE - 1;
+
+ data = kmalloc(sizeof(*hdr) + plen, GFP_KERNEL);
+ if (!data)
+ return;
+ tmp = data;
+
+ hdr = (struct hci_command_hdr *)tmp;
+ hdr->opcode = cpu_to_le16(STLC2690_BT_OP_VS_STORE_IN_FS);
+ hdr->plen = plen;
+
+ tmp += sizeof(*hdr);
+ cmd = (struct bt_vs_store_in_fs_cmd *)tmp;
+ cmd->user_id = STLC2690_VS_STORE_IN_FS_USR_ID_BD_ADDR;
+ cmd->len = BT_BDADDR_SIZE;
+ /* Now copy the BD address received from user space control app. */
+ memcpy(&(cmd->data), bd_address, BT_BDADDR_SIZE);
+
+ SET_BOOT_STATE(BOOT_SEND_BD_ADDRESS);
+
+ create_and_send_bt_cmd(data, sizeof(*hdr) + plen);
+
+ kfree(data);
+}
+
+/**
+ * create_work_item() - Create work item and add it to the work queue.
+ * @work_func: Work function.
+ * @skb: Data packet.
+ * @data: Private data for caller.
+ */
+static void create_work_item(work_func_t work_func, struct sk_buff *skb,
+ void *data)
+{
+ struct stlc2690_work_struct *new_work;
+ int wq_err = 1;
+
+ new_work = kmalloc(sizeof(*new_work), GFP_ATOMIC);
+ if (!new_work) {
+ CG2900_ERR("Failed to alloc memory for stlc2690_work_struct!");
+ return;
+ }
+
+ new_work->skb = skb;
+ new_work->data = data;
+ INIT_WORK(&new_work->work, work_func);
+
+ wq_err = queue_work(stlc2690_info->wq, &new_work->work);
+ if (!wq_err) {
+ CG2900_ERR("Failed to queue work_struct because it's already in"
+ " the queue!");
+ kfree(new_work);
+ }
+}
+
+/**
+ * get_text_line()- Replacement function for stdio function fgets.
+ * @wr_buffer: Buffer to copy text to.
+ * @max_nbr_of_bytes: Max number of bytes to read, i.e. size of rd_buffer.
+ * @rd_buffer: Data to parse.
+ * @bytes_copied: Number of bytes copied to wr_buffer.
+ *
+ * The get_text_line() function extracts one line of text from input file.
+ *
+ * Returns:
+ * Pointer to next data to read.
+ */
+static char *get_text_line(char *wr_buffer, int max_nbr_of_bytes,
+ char *rd_buffer, int *bytes_copied)
+{
+ char *curr_wr = wr_buffer;
+ char *curr_rd = rd_buffer;
+ char in_byte;
+
+ *bytes_copied = 0;
+
+ do {
+ *curr_wr = *curr_rd;
+ in_byte = *curr_wr;
+ curr_wr++;
+ curr_rd++;
+ (*bytes_copied)++;
+ } while ((*bytes_copied <= max_nbr_of_bytes) && (in_byte != '\0') &&
+ (in_byte != '\n'));
+ *curr_wr = '\0';
+ return curr_rd;
+}
+
+/**
+ * get_file_to_load() - Parse info file and find correct target file.
+ * @fw: Firmware structure containing file data.
+ * @file_name: (out) Pointer to name of requested file.
+ *
+ * Returns:
+ * True, if target file was found,
+ * False, otherwise.
+ */
+static bool get_file_to_load(const struct firmware *fw, char **file_name)
+{
+ char *line_buffer;
+ char *curr_file_buffer;
+ int bytes_left_to_parse = fw->size;
+ int bytes_read = 0;
+ bool file_found = false;
+ u32 hci_rev;
+ u32 lmp_sub;
+
+ curr_file_buffer = (char *)&(fw->data[0]);
+
+ line_buffer = kzalloc(LINE_BUFFER_LENGTH, GFP_ATOMIC);
+ if (!line_buffer) {
+ CG2900_ERR("Failed to allocate: file_name 0x%X, "
+ "line_buffer 0x%X",
+ (u32)file_name, (u32)line_buffer);
+ goto finished;
+ }
+
+ while (!file_found) {
+ /* Get one line of text from the file to parse */
+ curr_file_buffer = get_text_line(line_buffer,
+ min(LINE_BUFFER_LENGTH,
+ (int)(fw->size - bytes_read)),
+ curr_file_buffer,
+ &bytes_read);
+
+ bytes_left_to_parse -= bytes_read;
+ if (bytes_left_to_parse <= 0) {
+ /* End of file => Leave while loop */
+ CG2900_ERR("Reached end of file. No file found!");
+ break;
+ }
+
+ /*
+ * Check if the line of text is a comment or not,
+ * comments begin with '#'
+ */
+ if (*line_buffer == '#')
+ continue;
+
+ hci_rev = 0;
+ lmp_sub = 0;
+
+ CG2900_DBG("Found a valid line <%s>", line_buffer);
+
+ /*
+ * Check if we can find the correct HCI revision and
+ * LMP subversion as well as a file name in the text line.
+ * Store the filename if the actual file can be found in
+ * the file system.
+ */
+ if (sscanf(line_buffer, "%x%x%s", &hci_rev, &lmp_sub,
+ *file_name) == 3
+ && hci_rev == stlc2690_info->chip_dev.chip.hci_revision
+ && lmp_sub ==
+ stlc2690_info->chip_dev.chip.hci_sub_version) {
+ CG2900_DBG("File matching chip found\n"
+ "\tFile name = %s\n"
+ "\tHCI Revision = 0x%X\n"
+ "\tLMP PAL Subversion = 0x%X",
+ *file_name, hci_rev, lmp_sub);
+
+ /*
+ * Name has already been stored above. Nothing more to
+ * do.
+ */
+ file_found = true;
+ } else {
+ /* Zero the name buffer so it is clear to next read */
+ memset(*file_name, 0x00, FILENAME_MAX + 1);
+ }
+ }
+ kfree(line_buffer);
+
+finished:
+ return file_found;
+}
+
+/**
+ * read_and_send_file_part() - Transmit a part of the supplied file.
+ *
+ * The read_and_send_file_part() function transmit a part of the supplied file
+ * to the controller.
+ * If nothing more to read, set the correct states.
+ */
+static void read_and_send_file_part(void)
+{
+ int bytes_to_copy;
+ struct sk_buff *skb;
+ struct cg2900_hci_logger_config *logger_config;
+ struct hci_command_hdr *hdr;
+ struct bt_vs_write_file_block_cmd *cmd;
+ u8 *data;
+ u8 plen;
+
+ /* Calculate number of bytes to copy;
+ * either max bytes for HCI packet or number of bytes left in file
+ */
+ bytes_to_copy = min((int)HCI_BT_SEND_FILE_MAX_CHUNK_SIZE,
+ (int)(stlc2690_info->fw_file->size -
+ stlc2690_info->file_offset));
+
+ if (bytes_to_copy <= 0) {
+ /* Nothing more to read in file. */
+ SET_DOWNLOAD_STATE(DOWNLOAD_SUCCESS);
+ stlc2690_info->chunk_id = 0;
+ stlc2690_info->file_offset = 0;
+ return;
+ }
+
+ /* There is more data to send */
+ logger_config = cg2900_get_hci_logger_config();
+
+ /* There are bytes to transmit. Allocate a sk_buffer. */
+ plen = sizeof(*cmd) - 1 + bytes_to_copy;
+ skb = cg2900_alloc_skb(sizeof(*hdr) + plen, GFP_ATOMIC);
+ if (!skb) {
+ CG2900_ERR("Couldn't allocate sk_buffer");
+ SET_BOOT_STATE(BOOT_FAILED);
+ cg2900_chip_startup_finished(-EIO);
+ return;
+ }
+
+ skb_put(skb, sizeof(*hdr) + plen);
+
+ data = skb->data;
+ hdr = (struct hci_command_hdr *)data;
+ hdr->opcode = cpu_to_le16(STLC2690_BT_OP_VS_WRITE_FILE_BLOCK);
+ hdr->plen = plen;
+
+ data += sizeof(*hdr);
+ cmd = (struct bt_vs_write_file_block_cmd *)data;
+ cmd->id = stlc2690_info->chunk_id;
+ stlc2690_info->chunk_id++;
+
+ /* Copy the data from offset position */
+ memcpy(&(cmd->data),
+ &(stlc2690_info->fw_file->data[stlc2690_info->file_offset]),
+ bytes_to_copy);
+
+ /* Increase offset with number of bytes copied */
+ stlc2690_info->file_offset += bytes_to_copy;
+
+ skb_push(skb, CG2900_SKB_RESERVE);
+ skb->data[0] = CHANNEL_BT_CMD;
+
+ if (logger_config)
+ cg2900_send_to_chip(skb, logger_config->bt_cmd_enable);
+ else
+ cg2900_send_to_chip(skb, false);
+}
+
+/**
+ * send_settings_file() - Transmit settings file.
+ *
+ * The send_settings_file() function transmit settings file.
+ * The file is read in parts to fit in HCI packets.
+ * When finished, close the settings file and send HCI reset to activate
+ * settings and patches.
+ */
+static void send_settings_file(void)
+{
+ /* Transmit a file part */
+ read_and_send_file_part();
+
+ if (stlc2690_info->download_state != DOWNLOAD_SUCCESS)
+ return;
+
+ /* Settings file finished. Release used resources */
+ CG2900_DBG("Settings file finished, release used resources");
+
+ if (stlc2690_info->fw_file) {
+ release_firmware(stlc2690_info->fw_file);
+ stlc2690_info->fw_file = NULL;
+ }
+
+ SET_FILE_LOAD_STATE(FILE_LOAD_NO_MORE_FILES);
+
+ /* Create and send HCI VS Store In FS command with bd address. */
+ send_bd_address();
+}
+
+/**
+ * send_patch_file - Transmit patch file.
+ *
+ * The send_patch_file() function transmit patch file. The file is
read in parts
+ * to fit in HCI packets.
+ * When the complete file is transmitted, the file is closed.
+ * When finished, continue with settings file.
+ */
+static void send_patch_file(void)
+{
+ int err;
+
+ /*
+ * Transmit a part of the supplied file to the controller.
+ * When nothing more to read, continue to close the patch file.
+ */
+ read_and_send_file_part();
+
+ if (stlc2690_info->download_state != DOWNLOAD_SUCCESS)
+ return;
+
+ /* Patch file finished. Release used resources */
+ CG2900_DBG("Patch file finished, release used resources");
+
+ if (stlc2690_info->fw_file) {
+ release_firmware(stlc2690_info->fw_file);
+ stlc2690_info->fw_file = NULL;
+ }
+
+ err = request_firmware(&(stlc2690_info->fw_file),
+ stlc2690_info->settings_file_name,
+ stlc2690_info->chip_dev.dev);
+ if (err < 0) {
+ CG2900_ERR("Couldn't get settings file (%d)", err);
+ goto error_handling;
+ }
+
+ /* Now send the settings file */
+ SET_FILE_LOAD_STATE(FILE_LOAD_GET_STATIC_SETTINGS);
+ SET_DOWNLOAD_STATE(DOWNLOAD_PENDING);
+ send_settings_file();
+ return;
+
+error_handling:
+ SET_BOOT_STATE(BOOT_FAILED);
+ cg2900_chip_startup_finished(err);
+}
+
+/**
+ * work_reset_after_error() - Handle reset.
+ * @work: Reference to work data.
+ *
+ * Handle a reset after received command complete event.
+ */
+static void work_reset_after_error(struct work_struct *work)
+{
+ struct stlc2690_work_struct *current_work = NULL;
+
+ if (!work) {
+ CG2900_ERR("work == NULL");
+ return;
+ }
+
+ current_work = container_of(work, struct stlc2690_work_struct, work);
+
+ cg2900_chip_startup_finished(-EIO);
+
+ kfree(current_work);
+}
+
+/**
+ * work_load_patch_and_settings() - Start loading patches and settings.
+ * @work: Reference to work data.
+ */
+static void work_load_patch_and_settings(struct work_struct *work)
+{
+ struct stlc2690_work_struct *current_work;
+ int err = 0;
+ bool file_found;
+ const struct firmware *patch_info;
+ const struct firmware *settings_info;
+
+ if (!work) {
+ CG2900_ERR("work == NULL");
+ return;
+ }
+
+ current_work = container_of(work, struct stlc2690_work_struct, work);
+
+ /* Check that we are in the right state */
+ if (stlc2690_info->boot_state != BOOT_GET_FILES_TO_LOAD)
+ goto finished;
+
+ /* Open patch info file. */
+ err = request_firmware(&patch_info, PATCH_INFO_FILE,
+ stlc2690_info->chip_dev.dev);
+ if (err) {
+ CG2900_ERR("Couldn't get patch info file (%d)", err);
+ goto error_handling;
+ }
+
+ /*
+ * Now we have the patch info file.
+ * See if we can find the right patch file as well
+ */
+ file_found = get_file_to_load(patch_info,
+ &(stlc2690_info->patch_file_name));
+
+ /* Now we are finished with the patch info file */
+ release_firmware(patch_info);
+
+ if (!file_found) {
+ CG2900_ERR("Couldn't find patch file! Major error!");
+ goto error_handling;
+ }
+
+ /* Open settings info file. */
+ err = request_firmware(&settings_info, FACTORY_SETTINGS_INFO_FILE,
+ stlc2690_info->chip_dev.dev);
+ if (err) {
+ CG2900_ERR("Couldn't get settings info file (%d)", err);
+ goto error_handling;
+ }
+
+ /*
+ * Now we have the settings info file.
+ * See if we can find the right settings file as well
+ */
+ file_found = get_file_to_load(settings_info,
+ &(stlc2690_info->settings_file_name));
+
+ /* Now we are finished with the patch info file */
+ release_firmware(settings_info);
+
+ if (!file_found) {
+ CG2900_ERR("Couldn't find settings file! Major error!");
+ goto error_handling;
+ }
+
+ /* We now all info needed */
+ SET_BOOT_STATE(BOOT_DOWNLOAD_PATCH);
+ SET_DOWNLOAD_STATE(DOWNLOAD_PENDING);
+ SET_FILE_LOAD_STATE(FILE_LOAD_GET_PATCH);
+ stlc2690_info->chunk_id = 0;
+ stlc2690_info->file_offset = 0;
+ stlc2690_info->fw_file = NULL;
+
+ /* OK. Now it is time to download the patches */
+ err = request_firmware(&(stlc2690_info->fw_file),
+ stlc2690_info->patch_file_name,
+ stlc2690_info->chip_dev.dev);
+ if (err < 0) {
+ CG2900_ERR("Couldn't get patch file (%d)", err);
+ goto error_handling;
+ }
+ send_patch_file();
+
+ goto finished;
+
+error_handling:
+ SET_BOOT_STATE(BOOT_FAILED);
+ cg2900_chip_startup_finished(-EIO);
+finished:
+ kfree(current_work);
+}
+
+/**
+ * work_cont_with_file_download() - A file block has been written.
+ * @work: Reference to work data.
+ *
+ * Handle a received HCI VS Write File Block Complete event.
+ * Normally this means continue to send files to the controller.
+ */
+static void work_cont_with_file_download(struct work_struct *work)
+{
+ struct stlc2690_work_struct *current_work;
+
+ if (!work) {
+ CG2900_ERR("work == NULL");
+ return;
+ }
+
+ current_work = container_of(work, struct stlc2690_work_struct, work);
+
+ /* Continue to send patches or settings to the controller */
+ if (stlc2690_info->file_load_state == FILE_LOAD_GET_PATCH)
+ send_patch_file();
+ else if (stlc2690_info->file_load_state ==
+ FILE_LOAD_GET_STATIC_SETTINGS)
+ send_settings_file();
+ else
+ CG2900_INFO("No more files to load");
+
+ kfree(current_work);
+}
+
+/**
+ * handle_reset_cmd_complete() - Handle a received HCI Command
Complete event for a Reset command.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_reset_cmd_complete(u8 *data)
+{
+ u8 status;
+
+ CG2900_INFO("Received Reset complete event");
+
+ if (stlc2690_info->boot_state != BOOT_ACTIVATE_PATCHES_AND_SETTINGS)
+ return false;
+
+ status = data[0];
+
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ /*
+ * The boot sequence is now finished successfully.
+ * Set states and signal to waiting thread.
+ */
+ SET_BOOT_STATE(BOOT_READY);
+ cg2900_chip_startup_finished(0);
+ } else {
+ CG2900_ERR("Received Reset complete event with status 0x%X",
+ status);
+ SET_BOOT_STATE(BOOT_FAILED);
+ cg2900_chip_startup_finished(-EIO);
+ }
+ return true;
+}
+
+/**
+ * handle_vs_store_in_fs_cmd_complete() - Handle a received HCI
Command Complete event for a VS StoreInFS command.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_vs_store_in_fs_cmd_complete(u8 *data)
+{
+ u8 status;
+
+ CG2900_INFO("Received Store_in_FS complete event");
+
+ if (stlc2690_info->boot_state != BOOT_SEND_BD_ADDRESS)
+ return false;
+
+ status = data[0];
+
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ struct hci_command_hdr cmd;
+
+ /* Send HCI Reset command to activate patches */
+ SET_BOOT_STATE(BOOT_ACTIVATE_PATCHES_AND_SETTINGS);
+ cmd.opcode = cpu_to_le16(HCI_OP_RESET);
+ cmd.plen = 0; /* No parameters for HCI Reset */
+ create_and_send_bt_cmd(&cmd, sizeof(cmd));
+ } else {
+ CG2900_ERR("Command Complete for StoreInFS received with "
+ "error 0x%X", status);
+ SET_BOOT_STATE(BOOT_FAILED);
+ create_work_item(work_reset_after_error, NULL, NULL);
+ }
+ /* We have now handled the packet */
+ return true;
+}
+
+/**
+ * handle_vs_write_file_block_cmd_complete() - Handle a received HCI
Command Complete event for a VS WriteFileBlock command.
+ * @data: Pointer to received HCI data packet.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_vs_write_file_block_cmd_complete(u8 *data)
+{
+ u8 status;
+
+ if ((stlc2690_info->boot_state != BOOT_DOWNLOAD_PATCH) ||
+ (stlc2690_info->download_state != DOWNLOAD_PENDING))
+ return false;
+
+ status = data[0];
+ if (HCI_BT_ERROR_NO_ERROR == status) {
+ /* Received good confirmation. Start work to continue. */
+ create_work_item(work_cont_with_file_download, NULL, NULL);
+ } else {
+ CG2900_ERR("Command Complete for WriteFileBlock received with "
+ "error 0x%X", status);
+ SET_DOWNLOAD_STATE(DOWNLOAD_FAILED);
+ SET_BOOT_STATE(BOOT_FAILED);
+ if (stlc2690_info->fw_file) {
+ release_firmware(stlc2690_info->fw_file);
+ stlc2690_info->fw_file = NULL;
+ }
+ create_work_item(work_reset_after_error, NULL, NULL);
+ }
+ /* We have now handled the packet */
+ return true;
+}
+
+/**
+ * handle_rx_data_bt_evt() - Check if received data should be handled.
+ * @skb: Data packet
+ *
+ * The handle_rx_data_bt_evt() function checks if received data should be
+ * handled by STLC2690. If so handle it correctly.
+ * Received data is always HCI BT Event.
+ *
+ * Returns:
+ * True, if packet was handled internally,
+ * False, otherwise.
+ */
+static bool handle_rx_data_bt_evt(struct sk_buff *skb)
+{
+ bool pkt_handled = false;
+ /* skb cannot be NULL here so it is safe to de-reference */
+ u8 *data = &(skb->data[CG2900_SKB_RESERVE]);
+ struct hci_event_hdr *evt;
+ struct hci_ev_cmd_complete *cmd_complete;
+ u16 op_code;
+
+ evt = (struct hci_event_hdr *)data;
+
+ /* First check the event code. Only handle Command Complete Event */
+ if (HCI_EV_CMD_COMPLETE != evt->evt)
+ return false;
+
+ data += sizeof(*evt);
+ cmd_complete = (struct hci_ev_cmd_complete *)data;
+
+ op_code = le16_to_cpu(cmd_complete->opcode);
+
+ CG2900_DBG_DATA("Received Command Complete: op_code = 0x%04X", op_code);
+ data += sizeof(*cmd_complete); /* Move to first byte after OCF */
+
+ if (op_code == HCI_OP_RESET)
+ pkt_handled = handle_reset_cmd_complete(data);
+ else if (op_code == STLC2690_BT_OP_VS_STORE_IN_FS)
+ pkt_handled = handle_vs_store_in_fs_cmd_complete(data);
+ else if (op_code == STLC2690_BT_OP_VS_WRITE_FILE_BLOCK)
+ pkt_handled = handle_vs_write_file_block_cmd_complete(data);
+
+ if (pkt_handled)
+ kfree_skb(skb);
+
+ return pkt_handled;
+}
+
+/**
+ * chip_startup() - Start the chip.
+ * @dev: Chip info.
+ *
+ * The chip_startup() function downloads patches and other needed start
+ * procedures.
+ *
+ * Returns:
+ * 0 if there is no error.
+ */
+static int chip_startup(struct cg2900_chip_dev *dev)
+{
+ /* Start the boot sequence */
+ SET_BOOT_STATE(BOOT_GET_FILES_TO_LOAD);
+ create_work_item(work_load_patch_and_settings, NULL, NULL);
+
+ return 0;
+}
+
+/**
+ * data_from_chip() - Called when data shall be sent to the chip.
+ * @dev: Chip info.
+ * @cg2900_dev: CG2900 user for this packet.
+ * @skb: Packet received.
+ *
+ * The data_from_chip() function checks if packet is a response for a packet it
+ * itself has transmitted.
+ *
+ * Returns:
+ * true if packet is handled by this driver.
+ * false otherwise.
+ */
+static bool data_from_chip(struct cg2900_chip_dev *dev,
+ struct cg2900_device *cg2900_dev,
+ struct sk_buff *skb)
+{
+ /* Then check if this is a response to data we have sent */
+ return handle_rx_data_bt_evt(skb);
+}
+
+/**
+ * get_h4_channel() - Returns H:4 channel for the name.
+ * @name: Chip info.
+ * @h4_channel: CG2900 user for this packet.
+ *
+ * Returns:
+ * 0 if there is no error.
+ * -ENXIO if channel is not found.
+ */
+static int get_h4_channel(char *name, int *h4_channel)
+{
+ int i;
+ int err = -ENXIO;
+
+ *h4_channel = -1;
+
+ for (i = 0; *h4_channel == -1 && i < NBR_OF_DEVS; i++) {
+ if (0 == strncmp(name, stlc2690_channels[i].name,
+ CG2900_MAX_NAME_SIZE)) {
+ /* Device found. Return H4 channel */
+ *h4_channel = stlc2690_channels[i].h4_channel;
+ err = 0;
+ }
+ }
+
+ return err;
+}
+
+/**
+ * check_chip_support() - Checks if connected chip is handled by this driver.
+ * @dev: Chip info structure.
+ *
+ * If supported return true and fill in @callbacks.
+ *
+ * Returns:
+ * true if chip is handled by this driver.
+ * false otherwise.
+ */
+static bool check_chip_support(struct cg2900_chip_dev *dev)
+{
+ CG2900_INFO("check_chip_support");
+
+ /*
+ * Check if this is a CG2690 revision. We do not care about
+ * the sub-version at the moment.
+ * Change this if necessary.
+ */
+ if ((dev->chip.manufacturer != SUPP_MANUFACTURER) ||
+ (dev->chip.hci_revision < SUPP_REVISION_MIN) ||
+ (dev->chip.hci_revision > SUPP_REVISION_MAX)) {
+ CG2900_DBG("Chip not supported by STLC2690 driver\n"
+ "\tMan: 0x%02X\n"
+ "\tRev: 0x%04X\n"
+ "\tSub: 0x%04X",
+ dev->chip.manufacturer, dev->chip.hci_revision,
+ dev->chip.hci_sub_version);
+ return false;
+ }
+
+ CG2900_INFO("Chip supported by the STLC2690 driver");
+
+ /* Store needed data */
+ dev->user_data = stlc2690_info;
+ memcpy(&(stlc2690_info->chip_dev), dev, sizeof(*dev));
+ /* Set the callbacks */
+ dev->cb.chip_startup = chip_startup;
+ dev->cb.data_from_chip = data_from_chip;
+ dev->cb.get_h4_channel = get_h4_channel;
+
+ return true;
+}
+
+static struct cg2900_id_callbacks stlc2690_id_callbacks = {
+ .check_chip_support = check_chip_support
+};
+
+/**
+ * stlc2690_init() - Initialize module.
+ *
+ * The stlc2690_init() function initialize the CG2690 driver, then register to
+ * the CG2900 Core.
+ *
+ * Returns:
+ * 0 if success.
+ * -ENOMEM for failed alloc or structure creation.
+ * Error codes generated by cg2900_register_chip_driver.
+ */
+static int __init stlc2690_init(void)
+{
+ int err = 0;
+
+ CG2900_INFO("stlc2690_init");
+
+ stlc2690_info = kzalloc(sizeof(*stlc2690_info), GFP_ATOMIC);
+ if (!stlc2690_info) {
+ CG2900_ERR("Couldn't allocate stlc2690_info");
+ err = -ENOMEM;
+ goto finished;
+ }
+
+ stlc2690_info->wq = create_singlethread_workqueue(WQ_NAME);
+ if (!stlc2690_info->wq) {
+ CG2900_ERR("Could not create workqueue");
+ err = -ENOMEM;
+ goto err_handling_free_info;
+ }
+
+ /*
+ * Allocate file names that will be used, deallocated in stlc2690_exit.
+ */
+ stlc2690_info->patch_file_name = kzalloc(FILENAME_MAX + 1, GFP_ATOMIC);
+ if (!stlc2690_info->patch_file_name) {
+ CG2900_ERR("Couldn't allocate name buffer for patch file.");
+ err = -ENOMEM;
+ goto err_handling_destroy_wq;
+ }
+ /*
+ * Allocate file names that will be used, deallocated in stlc2690_exit.
+ */
+ stlc2690_info->settings_file_name = kzalloc(FILENAME_MAX + 1,
+ GFP_ATOMIC);
+ if (!stlc2690_info->settings_file_name) {
+ CG2900_ERR("Couldn't allocate name buffers settings file.");
+ err = -ENOMEM;
+ goto err_handling_free_patch_name;
+ }
+
+ err = cg2900_register_chip_driver(&stlc2690_id_callbacks);
+ if (err) {
+ CG2900_ERR("Couldn't register chip driver (%d)", err);
+ goto err_handling_free_settings_name;
+ }
+
+ goto finished;
+
+err_handling_free_settings_name:
+ kfree(stlc2690_info->settings_file_name);
+err_handling_free_patch_name:
+ kfree(stlc2690_info->patch_file_name);
+err_handling_destroy_wq:
+ destroy_workqueue(stlc2690_info->wq);
+err_handling_free_info:
+ kfree(stlc2690_info);
+ stlc2690_info = NULL;
+finished:
+ return err;
+}
+
+/**
+ * stlc2690_exit() - Remove module.
+ */
+static void __exit stlc2690_exit(void)
+{
+ CG2900_INFO("stlc2690_exit");
+
+ if (!stlc2690_info)
+ return;
+
+ kfree(stlc2690_info->settings_file_name);
+ kfree(stlc2690_info->patch_file_name);
+ destroy_workqueue(stlc2690_info->wq);
+ kfree(stlc2690_info);
+ stlc2690_info = NULL;
+}
+
+module_init(stlc2690_init);
+module_exit(stlc2690_exit);
+
+MODULE_AUTHOR("Par-Gunnar Hjalmdahl ST-Ericsson");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Linux STLC2690 Connectivity Device Driver");
diff --git a/drivers/mfd/cg2900/stlc2690_chip.h
b/drivers/mfd/cg2900/stlc2690_chip.h
new file mode 100644
index 0000000..deb974d
--- /dev/null
+++ b/drivers/mfd/cg2900/stlc2690_chip.h
@@ -0,0 +1,37 @@
+/*
+ * drivers/mfd/cg2900/stlc2690_chip.h
+ *
+ * Copyright (C) ST-Ericsson SA 2010
+ * Authors:
+ * Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@...ricsson.com) for
ST-Ericsson.
+ * Henrik Possung (henrik.possung@...ricsson.com) for ST-Ericsson.
+ * Josef Kindberg (josef.kindberg@...ricsson.com) for ST-Ericsson.
+ * Dariusz Szymszak (dariusz.xd.szymczak@...ricsson.com) for ST-Ericsson.
+ * Kjell Andersson (kjell.k.andersson@...ricsson.com) for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ *
+ * Linux Bluetooth HCI H:4 Driver for ST-Ericsson STLC2690 BT/FM controller.
+ */
+
+#ifndef _STLC2690_CHIP_H_
+#define _STLC2690_CHIP_H_
+
+/* BT VS Store In FS command */
+#define STLC2690_BT_OP_VS_STORE_IN_FS 0xFC22
+struct bt_vs_store_in_fs_cmd {
+ __u8 user_id;
+ __u8 len;
+ __u8 data; /* Really a data array of variable size */
+} __attribute__((packed));
+
+/* BT VS Write File Block command */
+#define STLC2690_BT_OP_VS_WRITE_FILE_BLOCK 0xFC2E
+struct bt_vs_write_file_block_cmd {
+ __u8 id;
+ __u8 data; /* Really a data array of variable size */
+} __attribute__((packed));
+
+/* User ID for storing BD address in chip using Store_In_FS command */
+#define STLC2690_VS_STORE_IN_FS_USR_ID_BD_ADDR 0xFE
+
+#endif /* _STLC2690_CHIP_H_ */
--
1.6.3.3
--
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