diff options
Diffstat (limited to 'drivers/misc/ti-st')
| -rw-r--r-- | drivers/misc/ti-st/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/misc/ti-st/st_core.c | 26 | ||||
| -rw-r--r-- | drivers/misc/ti-st/st_kim.c | 146 | ||||
| -rw-r--r-- | drivers/misc/ti-st/st_ll.c | 2 |
4 files changed, 99 insertions, 77 deletions
diff --git a/drivers/misc/ti-st/Kconfig b/drivers/misc/ti-st/Kconfig index abb5de1afce..f34dcc51473 100644 --- a/drivers/misc/ti-st/Kconfig +++ b/drivers/misc/ti-st/Kconfig @@ -5,7 +5,7 @@ menu "Texas Instruments shared transport line discipline" config TI_ST tristate "Shared transport core driver" - depends on NET && GPIOLIB + depends on NET && GPIOLIB && TTY select FW_LOADER help This enables the shared transport core driver for TI diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index 2b62232c2c6..1972d57aadb 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -22,7 +22,6 @@ #define pr_fmt(fmt) "(stc): " fmt #include <linux/module.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/tty.h> #include <linux/seq_file.h> @@ -30,11 +29,13 @@ #include <linux/ti_wilink_st.h> +extern void st_kim_recv(void *, const unsigned char *, long); +void st_int_recv(void *, const unsigned char *, long); /* function pointer pointing to either, * st_kim_recv during registration to receive fw download responses * st_int_recv after registration to receive proto stack responses */ -void (*st_recv) (void*, const unsigned char*, long); +static void (*st_recv) (void *, const unsigned char *, long); /********************************************************************/ static void add_channel_to_table(struct st_data_s *st_gdata, @@ -100,7 +101,7 @@ int st_int_write(struct st_data_s *st_gdata, * push the skb received to relevant * protocol stacks */ -void st_send_frame(unsigned char chnl_id, struct st_data_s *st_gdata) +static void st_send_frame(unsigned char chnl_id, struct st_data_s *st_gdata) { pr_debug(" %s(prot:%d) ", __func__, chnl_id); @@ -140,7 +141,7 @@ void st_send_frame(unsigned char chnl_id, struct st_data_s *st_gdata) * This function is being called with spin lock held, protocol drivers are * only expected to complete their waits and do nothing more than that. */ -void st_reg_complete(struct st_data_s *st_gdata, char err) +static void st_reg_complete(struct st_data_s *st_gdata, char err) { unsigned char i = 0; pr_info(" %s ", __func__); @@ -238,7 +239,8 @@ void st_int_recv(void *disc_data, char *ptr; struct st_proto_s *proto; unsigned short payload_len = 0; - int len = 0, type = 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; @@ -349,6 +351,11 @@ void st_int_recv(void *disc_data, 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 */ @@ -374,7 +381,7 @@ done: * completely, return that skb which has the pending data. * In normal cases, return top of txq. */ -struct sk_buff *st_int_dequeue(struct st_data_s *st_gdata) +static struct sk_buff *st_int_dequeue(struct st_data_s *st_gdata) { struct sk_buff *returning_skb; @@ -396,7 +403,7 @@ struct sk_buff *st_int_dequeue(struct st_data_s *st_gdata) * txq and waitq needs protection since the other contexts * may be sending data, waking up chip. */ -void st_int_enqueue(struct st_data_s *st_gdata, struct sk_buff *skb) +static void st_int_enqueue(struct st_data_s *st_gdata, struct sk_buff *skb) { unsigned long flags = 0; @@ -504,7 +511,6 @@ long st_register(struct st_proto_s *new_proto) unsigned long flags = 0; st_kim_ref(&st_gdata, 0); - pr_info("%s(%d) ", __func__, new_proto->chnl_id); 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"); @@ -555,7 +561,9 @@ long st_register(struct st_proto_s *new_proto) 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; @@ -803,7 +811,7 @@ static void st_tty_flush_buffer(struct tty_struct *tty) kfree_skb(st_gdata->tx_skb); st_gdata->tx_skb = NULL; - tty->ops->flush_buffer(tty); + tty_driver_flush_buffer(tty); return; } diff --git a/drivers/misc/ti-st/st_kim.c b/drivers/misc/ti-st/st_kim.c index a7a861ceee2..9d3dbb28734 100644 --- a/drivers/misc/ti-st/st_kim.c +++ b/drivers/misc/ti-st/st_kim.c @@ -63,10 +63,27 @@ static struct platform_device *st_get_plat_device(int id) * in case of error don't complete so that waiting for proper * response times out */ -void validate_firmware_response(struct kim_data_s *kim_gdata) +static void validate_firmware_response(struct kim_data_s *kim_gdata) { struct sk_buff *skb = kim_gdata->rx_skb; - if (unlikely(skb->data[5] != 0)) { + 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); + complete_all(&kim_gdata->kim_rcvd); + 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); @@ -119,7 +136,7 @@ static inline int kim_check_data_len(struct kim_data_s *kim_gdata, int len) * have been observed to come in bursts of different * tty_receive and hence the logic */ -void kim_int_recv(struct kim_data_s *kim_gdata, +static void kim_int_recv(struct kim_data_s *kim_gdata, const unsigned char *data, long count) { const unsigned char *ptr; @@ -201,22 +218,25 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) pr_debug("%s", __func__); - INIT_COMPLETION(kim_gdata->kim_rcvd); + 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; } - if (!wait_for_completion_timeout - (&kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) { + if (!wait_for_completion_interruptible_timeout( + &kim_gdata->kim_rcvd, msecs_to_jiffies(CMD_RESP_TIME))) { pr_err(" waiting for ver info- timed out "); return -ETIMEDOUT; } - INIT_COMPLETION(kim_gdata->kim_rcvd); + 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[13], - kim_gdata->resp_buffer[14]); + MAKEWORD(kim_gdata->resp_buffer[12], + kim_gdata->resp_buffer[13]); chip = (version & 0x7C00) >> 10; min_ver = (version & 0x007F); maj_ver = (version & 0x0380) >> 7; @@ -236,7 +256,7 @@ static long read_local_version(struct kim_data_s *kim_gdata, char *bts_scr_name) return 0; } -void skip_change_remote_baud(unsigned char **ptr, long *len) +static void skip_change_remote_baud(unsigned char **ptr, long *len) { unsigned char *nxt_action, *cur_action; cur_action = *ptr; @@ -342,7 +362,7 @@ static long download_firmware(struct kim_data_s *kim_gdata) /* reinit completion before sending for the * relevant wait */ - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); /* * Free space found in uart buffer, call st_int_write @@ -370,15 +390,15 @@ static long download_firmware(struct kim_data_s *kim_gdata) break; case ACTION_WAIT_EVENT: /* wait */ pr_debug("W"); - if (!wait_for_completion_timeout - (&kim_gdata->kim_rcvd, - msecs_to_jiffies(CMD_RESP_TIME))) { + if (!wait_for_completion_interruptible_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 -ETIMEDOUT; } - INIT_COMPLETION(kim_gdata->kim_rcvd); + reinit_completion(&kim_gdata->kim_rcvd); break; case ACTION_DELAY: /* sleep */ pr_info("sleep command in scr"); @@ -410,16 +430,10 @@ void st_kim_recv(void *disc_data, const unsigned char *data, long count) struct st_data_s *st_gdata = (struct st_data_s *)disc_data; struct kim_data_s *kim_gdata = st_gdata->kim_data; - /* copy to local buffer */ - if (unlikely(data[4] == 0x01 && data[5] == 0x10 && data[0] == 0x04)) { - /* must be the read_ver_cmd */ - memcpy(kim_gdata->resp_buffer, data, count); - complete_all(&kim_gdata->kim_rcvd); - return; - } else { - kim_int_recv(kim_gdata, data, count); - /* either completes or times out */ - } + /* 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; } @@ -460,15 +474,15 @@ long st_kim_start(void *kim_data) gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); mdelay(100); /* re-initialize the completion */ - INIT_COMPLETION(kim_gdata->ldisc_installed); + 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_timeout(&kim_gdata->ldisc_installed, - msecs_to_jiffies(LDISC_TIME)); + 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 */ @@ -511,13 +525,12 @@ long st_kim_stop(void *kim_data) kim_gdata->kim_pdev->dev.platform_data; struct tty_struct *tty = kim_gdata->core_data->tty; - INIT_COMPLETION(kim_gdata->ldisc_installed); + 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); - tty->ops->flush_buffer(tty); } /* send uninstall notification to UIM */ @@ -526,11 +539,11 @@ long st_kim_stop(void *kim_data) sysfs_notify(&kim_gdata->kim_pdev->dev.kobj, NULL, "install"); /* wait for ldisc to be un-installed */ - err = wait_for_completion_timeout(&kim_gdata->ldisc_installed, - msecs_to_jiffies(LDISC_TIME)); + 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"); - return -ETIMEDOUT; + err = -ETIMEDOUT; } /* By default configure BT nShutdown to LOW state */ @@ -666,7 +679,7 @@ void st_kim_ref(struct st_data_s **core_data, int id) *core_data = NULL; return; } - kim_gdata = dev_get_drvdata(&pdev->dev); + kim_gdata = platform_get_drvdata(pdev); *core_data = kim_gdata->core_data; } @@ -701,12 +714,12 @@ static const struct file_operations list_debugfs_fops = { * board-*.c file */ -struct dentry *kim_debugfs_dir; +static struct dentry *kim_debugfs_dir; static int kim_probe(struct platform_device *pdev) { - long status; 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 */ @@ -721,29 +734,30 @@ static int kim_probe(struct platform_device *pdev) pr_err("no mem to allocate"); return -ENOMEM; } - dev_set_drvdata(&pdev->dev, kim_gdata); + platform_set_drvdata(pdev, kim_gdata); - status = st_core_init(&kim_gdata->core_data); - if (status != 0) { + err = st_core_init(&kim_gdata->core_data); + if (err != 0) { pr_err(" ST core init failed"); - return -EIO; + 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; - status = gpio_request(kim_gdata->nshutdown, "kim"); - if (unlikely(status)) { + err = gpio_request(kim_gdata->nshutdown, "kim"); + if (unlikely(err)) { pr_err(" gpio %ld request failed ", kim_gdata->nshutdown); - return status; + return err; } /* Configure nShutdown GPIO as output=0 */ - status = gpio_direction_output(kim_gdata->nshutdown, 0); - if (unlikely(status)) { + err = gpio_direction_output(kim_gdata->nshutdown, 0); + if (unlikely(err)) { pr_err(" unable to configure gpio %ld", kim_gdata->nshutdown); - return status; + return err; } /* get reference of pdev for request_firmware */ @@ -751,10 +765,10 @@ static int kim_probe(struct platform_device *pdev) init_completion(&kim_gdata->kim_rcvd); init_completion(&kim_gdata->ldisc_installed); - status = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp); - if (status) { + err = sysfs_create_group(&pdev->dev.kobj, &uim_attr_grp); + if (err) { pr_err("failed to create sysfs entries"); - return status; + goto err_sysfs_group; } /* copying platform data */ @@ -766,8 +780,8 @@ static int kim_probe(struct platform_device *pdev) kim_debugfs_dir = debugfs_create_dir("ti-st", NULL); if (IS_ERR(kim_debugfs_dir)) { pr_err(" debugfs entries creation failed "); - kim_debugfs_dir = NULL; - return -EIO; + err = -EIO; + goto err_debugfs_dir; } debugfs_create_file("version", S_IRUGO, kim_debugfs_dir, @@ -776,6 +790,17 @@ static int kim_probe(struct platform_device *pdev) kim_gdata, &list_debugfs_fops); pr_info(" debugfs entries created "); return 0; + +err_debugfs_dir: + sysfs_remove_group(&pdev->dev.kobj, &uim_attr_grp); + +err_sysfs_group: + st_core_exit(kim_gdata->core_data); + +err_core_init: + kfree(kim_gdata); + + return err; } static int kim_remove(struct platform_device *pdev) @@ -784,7 +809,7 @@ static int kim_remove(struct platform_device *pdev) struct ti_st_plat_data *pdata = pdev->dev.platform_data; struct kim_data_s *kim_gdata; - kim_gdata = dev_get_drvdata(&pdev->dev); + kim_gdata = platform_get_drvdata(pdev); /* Free the Bluetooth/FM/GPIO * nShutdown gpio from the system @@ -804,7 +829,7 @@ static int kim_remove(struct platform_device *pdev) return 0; } -int kim_suspend(struct platform_device *pdev, pm_message_t state) +static int kim_suspend(struct platform_device *pdev, pm_message_t state) { struct ti_st_plat_data *pdata = pdev->dev.platform_data; @@ -814,7 +839,7 @@ int kim_suspend(struct platform_device *pdev, pm_message_t state) return -EOPNOTSUPP; } -int kim_resume(struct platform_device *pdev) +static int kim_resume(struct platform_device *pdev) { struct ti_st_plat_data *pdata = pdev->dev.platform_data; @@ -837,19 +862,8 @@ static struct platform_driver kim_platform_driver = { }, }; -static int __init st_kim_init(void) -{ - return platform_driver_register(&kim_platform_driver); -} - -static void __exit st_kim_deinit(void) -{ - platform_driver_unregister(&kim_platform_driver); -} - +module_platform_driver(kim_platform_driver); -module_init(st_kim_init); -module_exit(st_kim_deinit); MODULE_AUTHOR("Pavan Savoy <pavan_savoy@ti.com>"); MODULE_DESCRIPTION("Shared Transport Driver for TI BT/FM/GPS combo chips "); MODULE_LICENSE("GPL"); diff --git a/drivers/misc/ti-st/st_ll.c b/drivers/misc/ti-st/st_ll.c index 1ff460a8e9c..93b4d67cc4a 100644 --- a/drivers/misc/ti-st/st_ll.c +++ b/drivers/misc/ti-st/st_ll.c @@ -87,7 +87,7 @@ static void ll_device_want_to_wakeup(struct st_data_s *st_data) /* communicate to platform about chip wakeup */ kim_data = st_data->kim_data; pdata = kim_data->kim_pdev->dev.platform_data; - if (pdata->chip_asleep) + if (pdata->chip_awake) pdata->chip_awake(NULL); } |