Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933138Ab0DHSRu (ORCPT ); Thu, 8 Apr 2010 14:17:50 -0400 Received: from devils.ext.ti.com ([198.47.26.153]:56198 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933083Ab0DHSRT (ORCPT ); Thu, 8 Apr 2010 14:17:19 -0400 From: pavan_savoy@ti.com To: gregkh@suse.de, alan@lxorguk.ukuu.org.uk Cc: linux-kernel@vger.kernel.org, npelly@google.com, pavan_savoy@yahoo.co.in, Pavan Savoy Subject: [PATCH] drivers:staging: sources for Init manager module Date: Thu, 8 Apr 2010 13:16:54 -0500 Message-Id: <1270750619-19174-4-git-send-email-pavan_savoy@ti.com> X-Mailer: git-send-email 1.5.6.3 In-Reply-To: <1270750619-19174-3-git-send-email-pavan_savoy@ti.com> References: <1270750619-19174-1-git-send-email-pavan_savoy@ti.com> <1270750619-19174-2-git-send-email-pavan_savoy@ti.com> <1270750619-19174-3-git-send-email-pavan_savoy@ti.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 26471 Lines: 945 From: Pavan Savoy Kernel Space Init-Manager works along with User-Mode Init Manager daemon running to maintain the UART state. Communication between user-space daemon and this module can be 1. Via the pid written onto sysfs entry 2. Via the rfkill subsystem It also is a platform driver with a relevant platform device in the board-*.c along with the list of BT/FM/GPS chip enable gpio configuration Signed-off-by: Pavan Savoy --- drivers/staging/ti-st/st_kim.c | 754 ++++++++++++++++++++++++++++++++++++++++ drivers/staging/ti-st/st_kim.h | 150 ++++++++ 2 files changed, 904 insertions(+), 0 deletions(-) create mode 100644 drivers/staging/ti-st/st_kim.c create mode 100644 drivers/staging/ti-st/st_kim.h diff --git a/drivers/staging/ti-st/st_kim.c b/drivers/staging/ti-st/st_kim.c new file mode 100644 index 0000000..98cbabb --- /dev/null +++ b/drivers/staging/ti-st/st_kim.c @@ -0,0 +1,754 @@ +/* + * Shared Transport Line discipline driver Core + * Init Manager module responsible for GPIO control + * and firmware download + * Copyright (C) 2009 Texas Instruments + * + * 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 +#include +#include +#include +#include +#include + +#include + +#include "st_kim.h" +/* understand BT events for fw response */ +#include +#include +#include + + +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, + }, +}; + +#ifndef LEGACY_RFKILL_SUPPORT +static ssize_t show_pid(struct device *dev, struct device_attribute + *attr, char *buf); +static ssize_t store_pid(struct device *dev, struct device_attribute + *devattr, char *buf, size_t count); +static ssize_t show_list(struct device *dev, struct device_attribute + *attr, char *buf); + +/* structures specific for sysfs entries */ +static struct kobj_attribute pid_attr = +__ATTR(pid, 0644, (void *)show_pid, (void *)store_pid); + +static struct kobj_attribute list_protocols = +__ATTR(protocols, 0444, (void *)show_list, NULL); + +static struct attribute *uim_attrs[] = { + &pid_attr.attr, + /* add more debug sysfs entries */ + &list_protocols.attr, + NULL, +}; + +static struct attribute_group uim_attr_grp = { + .attrs = uim_attrs, +}; +#else +static int kim_toggle_radio(void*, bool); +static const struct rfkill_ops kim_rfkill_ops = { + .set_block = kim_toggle_radio, +}; +#endif /* LEGACY_RFKILL_SUPPORT */ + +/* 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"), +}; + +struct kim_data_s *kim_gdata; + +/**********************************************************************/ +/* internal functions */ + +/* + * 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 sk_buff *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(int len) +{ + register int room = skb_tailroom(kim_gdata->rx_skb); + + pr_info("len %d room %d", len, room); + + if (!len) { + validate_firmware_response(kim_gdata->rx_skb); + } 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; +} + +/* 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(const unsigned char *data, long count) +{ + register char *ptr; + struct hci_event_hdr *eh; + register int len = 0, type = 0; + + pr_info("%s", __func__); + /* Decode received bytes here */ + ptr = (char *)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_info("Complete pkt received"); + validate_firmware_response(kim_gdata->rx_skb); + 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_info("Event header: evt 0x%2.2x" + "plen %d", eh->evt, eh->plen); + kim_check_data_len(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; + } /* end of switch *ptr */ + 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; + } /* not necessary in this case */ + bt_cb(kim_gdata->rx_skb)->pkt_type = type; + } /* end of while count */ + pr_info("done %s", __func__); + return; +} + +static long read_local_version(char *bts_scr_name) +{ + unsigned short version = 0, chip = 0, min_ver = 0, maj_ver = 0; + char read_ver_cmd[] = { 0x01, 0x01, 0x10, 0x00 }; + + pr_info("%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 ST_ERR_FAILURE; + } + + if (!wait_for_completion_timeout + (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) { + pr_err(" waiting for ver info- timed out "); + return ST_ERR_FAILURE; + } + + 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); + pr_info("%s", bts_scr_name); + return ST_SUCCESS; +} + +/* internal function which parses through the .bts firmware script file + * intreprets SEND, DELAY actions only as of now + */ +static long download_firmware(void) +{ + long err = ST_SUCCESS; + long len = 0; + register unsigned char *ptr = NULL; + register unsigned char *action_ptr = NULL; + unsigned char bts_scr_name[30] = { 0 }; /* 30 char long bts scr name? */ + + pr_info("%s", __func__); + + err = read_local_version(bts_scr_name); + if (err != ST_SUCCESS) { + 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 ST_ERR_FAILURE; + } + 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_info(" 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 ST_ERR_FAILURE; + } + 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 ST_ERR_FAILURE; + } + 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 ST_SUCCESS; +} + +/**********************************************************************/ +/* 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) +{ + pr_info(" %s ", __func__); + + 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) +{ + 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(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) +{ + complete(&kim_gdata->ldisc_installed); +} + +/* called from ST Core upon 1st registration +*/ +long st_kim_start(void) +{ + long err = ST_SUCCESS; + long retry = POR_RETRY_COUNT; + pr_info(" %s", __func__); + + do { +#ifdef LEGACY_RFKILL_SUPPORT + /* 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); +#endif + /* 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); +#ifndef LEGACY_RFKILL_SUPPORT + /* 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 = ST_ERR_FAILURE; + continue; + } +#else + /* unblock and send event to UIM via /dev/rfkill */ + rfkill_set_hw_state(kim_gdata->rfkill[ST_BT], 0); +#endif + /* 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 = ST_ERR_FAILURE; + continue; + } else { + /* ldisc installed now */ + pr_info(" line discipline installed "); + err = download_firmware(); + if (err != ST_SUCCESS) { + pr_err("download firmware failed"); + continue; + } else { /* on success don't retry */ + break; + } + } + } while (retry--); + return err; +} + +/* called from ST Core, on the last un-registration +*/ +long st_kim_stop(void) +{ + long err = ST_SUCCESS; + + INIT_COMPLETION(kim_gdata->ldisc_installed); +#ifndef LEGACY_RFKILL_SUPPORT + /* 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 ST_ERR_FAILURE; + } +#else + /* set BT rfkill to be blocked */ + err = rfkill_set_hw_state(kim_gdata->rfkill[ST_BT], 1); +#endif + + /* 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 ST_ERR_FAILURE; + } + + /* 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 */ + +#ifndef LEGACY_RFKILL_SUPPORT +/* called when sysfs entry is written to */ +static ssize_t store_pid(struct device *dev, struct device_attribute + *devattr, char *buf, size_t count) +{ + pr_info("%s: pid %s ", __func__, buf); + sscanf(buf, "%ld", &kim_gdata->uim_pid); + /* to be made use by kim_start to signal SIGUSR2 + */ + return strlen(buf); +} + +/* called when sysfs entry is read from */ +static ssize_t show_pid(struct device *dev, struct device_attribute + *attr, char *buf) +{ + sprintf(buf, "%ld", kim_gdata->uim_pid); + return strlen(buf); +} + +/* called when sysfs entry is read from */ +static ssize_t show_list(struct device *dev, struct device_attribute + *attr, char *buf) +{ + kim_st_list_protocols(kim_gdata->core_data, buf); + return strlen(buf); +} + +#else /* LEGACY_RFKILL_SUPPORT */ + +/* 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_info(" %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 ST_SUCCESS; +} + +#endif /* LEGACY_RFKILL_SUPPORT */ + +void st_kim_ref(struct st_data_s **core_data) +{ + *core_data = kim_gdata->core_data; +} + +/**********************************************************************/ +/* functions called from platform device driver subsystem + * need to have a relevant platform device entry in the platform's + * board-*.c file + */ + +static int kim_probe(struct platform_device *pdev) +{ + long status; + long proto; + long *gpios = pdev->dev.platform_data; + + status = st_core_init(&kim_gdata->core_data); + if (status != 0) { + pr_err(" ST core init failed"); + return ST_ERR_FAILURE; + } + + 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; + } + } +#ifndef LEGACY_RFKILL_SUPPORT + /* pdev to contain BT, FM and GPS enable/N-Shutdown GPIOs + * execute request_gpio, set output direction + */ + kim_gdata->kim_kobj = kobject_create_and_add("uim", NULL); + /* create the sysfs entry for UIM to put in pid */ + if (sysfs_create_group(kim_gdata->kim_kobj, &uim_attr_grp)) { + pr_err(" sysfs entry creation failed"); + kobject_put(kim_gdata->kim_kobj); + /* free requested GPIOs and fail probe */ + for (proto = ST_BT; proto < ST_MAX; proto++) { + if (gpios[proto] != -1) + gpio_free(gpios[proto]); + } + return -1; /* fail insmod */ + } + pr_info(" sysfs entry created "); +#endif + /* get reference of pdev for request_firmware + */ + kim_gdata->kim_pdev = pdev; + init_completion(&kim_gdata->kim_rcvd); + init_completion(&kim_gdata->ldisc_installed); +#ifdef LEGACY_RFKILL_SUPPORT + 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]); + } +#endif + return ST_SUCCESS; +} + +static int kim_remove(struct platform_device *pdev) +{ + /* free the GPIOs requested + */ + long *gpios = pdev->dev.platform_data; + long proto; + + for (proto = 0; (proto < ST_MAX) && (gpios[proto] != -1); proto++) { + /* Claim the Bluetooth/FM/GPIO + * nShutdown gpio from the system + */ + gpio_free(gpios[proto]); +#ifdef LEGACY_RFKILL_SUPPORT + rfkill_unregister(kim_gdata->rfkill[proto]); + rfkill_destroy(kim_gdata->rfkill[proto]); + kim_gdata->rfkill[proto] = NULL; +#endif + } + pr_info("kim: GPIO Freed"); +#ifndef LEGACY_RFKILL_SUPPORT + /* delete the sysfs entries */ + sysfs_remove_group(kim_gdata->kim_kobj, &uim_attr_grp); + kobject_put(kim_gdata->kim_kobj); +#endif + kim_gdata->kim_pdev = NULL; + st_core_exit(kim_gdata->core_data); + return ST_SUCCESS; +} + +/**********************************************************************/ +/* entry point for ST KIM module, called in from ST Core */ + +static int __init st_kim_init(void) +{ + long ret = ST_SUCCESS; + kim_gdata = kzalloc(sizeof(struct kim_data_s), GFP_ATOMIC); + if (!kim_gdata) { + pr_err("no mem to allocate"); + return -ENOMEM; + } + + ret = platform_driver_register(&kim_platform_driver); + if (ret != 0) { + pr_err("platform drv registration failed"); + return ST_ERR_FAILURE; + } + return ST_SUCCESS; +} + +static void __exit st_kim_deinit(void) +{ + /* the following returns void */ + platform_driver_unregister(&kim_platform_driver); + kfree(kim_gdata); + kim_gdata = NULL; +} + + +module_init(st_kim_init); +module_exit(st_kim_deinit); +MODULE_AUTHOR("Pavan Savoy "); +MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips "); +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/ti-st/st_kim.h b/drivers/staging/ti-st/st_kim.h new file mode 100644 index 0000000..ff3270e --- /dev/null +++ b/drivers/staging/ti-st/st_kim.h @@ -0,0 +1,150 @@ +/* + * Shared Transport Line discipline driver Core + * Init Manager Module header file + * Copyright (C) 2009 Texas Instruments + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#ifndef ST_KIM_H +#define ST_KIM_H + +#include +#include "st.h" +#include "st_core.h" +#include "st_ll.h" +#include + +/* time in msec to wait for + * line discipline to be installed + */ +#define LDISC_TIME 500 +#define CMD_RESP_TIME 500 +#define MAKEWORD(a, b) ((unsigned short)(((unsigned char)(a)) \ + | ((unsigned short)((unsigned char)(b))) << 8)) + +#define GPIO_HIGH 1 +#define GPIO_LOW 0 + +/* the Power-On-Reset logic, requires to attempt + * to download firmware onto chip more than once + * since the self-test for chip takes a while + */ +#define POR_RETRY_COUNT 5 +/* + * legacy rfkill support where-in 3 rfkill + * devices are created for the 3 gpios + * that ST has requested + */ +#define LEGACY_RFKILL_SUPPORT +/* + * header file for ST provided by KIM + */ +struct kim_data_s { + long uim_pid; + struct platform_device *kim_pdev; + struct completion kim_rcvd, ldisc_installed; + /* MAX len of the .bts firmware script name */ + char resp_buffer[30]; + const struct firmware *fw_entry; + long gpios[ST_MAX]; + struct kobject *kim_kobj; +/* used by kim_int_recv to validate fw response */ + unsigned long rx_state; + unsigned long rx_count; + struct sk_buff *rx_skb; +#ifdef LEGACY_RFKILL_SUPPORT + struct rfkill *rfkill[ST_MAX]; + enum proto_type rf_protos[ST_MAX]; +#endif + struct st_data_s *core_data; +}; + +long st_kim_start(void); +long st_kim_stop(void); +/* + * called from st_tty_receive to authenticate fw_download + */ +void st_kim_recv(void *, const unsigned char *, long count); + +void st_kim_chip_toggle(enum proto_type, enum kim_gpio_state); + +void st_kim_complete(void); + +/* function called from ST KIM to ST Core, to + * list out the protocols registered + */ +void kim_st_list_protocols(struct st_data_s *, char *); + +/* + * BTS headers + */ +#define ACTION_SEND_COMMAND 1 +#define ACTION_WAIT_EVENT 2 +#define ACTION_SERIAL 3 +#define ACTION_DELAY 4 +#define ACTION_RUN_SCRIPT 5 +#define ACTION_REMARKS 6 + +/* + * * BRF Firmware header + * */ +struct bts_header { + uint32_t magic; + uint32_t version; + uint8_t future[24]; + uint8_t actions[0]; +} __attribute__ ((packed)); + +/* + * * BRF Actions structure + * */ +struct bts_action { + uint16_t type; + uint16_t size; + uint8_t data[0]; +} __attribute__ ((packed)); + +struct bts_action_send { + uint8_t data[0]; +} __attribute__ ((packed)); + +struct bts_action_wait { + uint32_t msec; + uint32_t size; + uint8_t data[0]; +} __attribute__ ((packed)); + +struct bts_action_delay { + uint32_t msec; +} __attribute__ ((packed)); + +struct bts_action_serial { + uint32_t baud; + uint32_t flow_control; +} __attribute__ ((packed)); + +/* for identifying the change speed HCI VS + * command + */ +struct hci_command { + uint8_t prefix; + uint16_t opcode; + uint8_t plen; + uint32_t speed; +} __attribute__ ((packed)); + + +#endif /* ST_KIM_H */ -- 1.5.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/