diff options
Diffstat (limited to 'kernel/drivers/misc/ti-st')
| -rw-r--r-- | kernel/drivers/misc/ti-st/st_core.c | 18 | ||||
| -rw-r--r-- | kernel/drivers/misc/ti-st/st_kim.c | 106 | ||||
| -rw-r--r-- | kernel/drivers/misc/ti-st/st_ll.c | 17 |
3 files changed, 30 insertions, 111 deletions
diff --git a/kernel/drivers/misc/ti-st/st_core.c b/kernel/drivers/misc/ti-st/st_core.c index c8c6a3630..6e3af8b42 100644 --- a/kernel/drivers/misc/ti-st/st_core.c +++ b/kernel/drivers/misc/ti-st/st_core.c @@ -460,6 +460,13 @@ static void st_int_enqueue(struct st_data_s *st_gdata, struct sk_buff *skb) * - 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; @@ -812,8 +819,12 @@ static void st_tty_wakeup(struct tty_struct *tty) /* don't do an wakeup for now */ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); - /* call our internal wakeup */ - st_tx_wakeup((void *)st_gdata); + /* + * 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) @@ -881,6 +892,9 @@ int st_core_init(struct st_data_s **core_data) pr_err("unable to un-register ldisc"); return err; } + + INIT_WORK(&st_gdata->work_write_wakeup, work_fn_write_wakeup); + *core_data = st_gdata; return 0; } diff --git a/kernel/drivers/misc/ti-st/st_kim.c b/kernel/drivers/misc/ti-st/st_kim.c index 18e7a0398..71b64550b 100644 --- a/kernel/drivers/misc/ti-st/st_kim.c +++ b/kernel/drivers/misc/ti-st/st_kim.c @@ -36,8 +36,6 @@ #include <linux/skbuff.h> #include <linux/ti_wilink_st.h> #include <linux/module.h> -#include <linux/of.h> -#include <linux/of_device.h> #define MAX_ST_DEVICES 3 /* Imagine 1 on each UART for now */ static struct platform_device *st_kim_devices[MAX_ST_DEVICES]; @@ -45,9 +43,6 @@ static struct platform_device *st_kim_devices[MAX_ST_DEVICES]; /**********************************************************************/ /* internal functions */ -struct ti_st_plat_data *dt_pdata; -static struct ti_st_plat_data *get_platform_data(struct device *dev); - /** * st_get_plat_device - * function which returns the reference to the platform device @@ -469,12 +464,7 @@ long st_kim_start(void *kim_data) struct kim_data_s *kim_gdata = (struct kim_data_s *)kim_data; pr_info(" %s", __func__); - if (kim_gdata->kim_pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = kim_gdata->kim_pdev->dev.platform_data; - } + pdata = kim_gdata->kim_pdev->dev.platform_data; do { /* platform specific enabling code here */ @@ -482,9 +472,9 @@ long st_kim_start(void *kim_data) pdata->chip_enable(kim_gdata); /* Configure BT nShutdown to HIGH state */ - gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); + gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); mdelay(5); /* FIXME: a proper toggle */ - gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); + gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH); mdelay(100); /* re-initialize the completion */ reinit_completion(&kim_gdata->ldisc_installed); @@ -534,18 +524,12 @@ 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; + 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 (kim_gdata->kim_pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else - pdata = kim_gdata->kim_pdev->dev.platform_data; - - if (tty) { /* can be called before ldisc is installed */ /* Flush any pending characters in the driver and discipline. */ tty_ldisc_flush(tty); @@ -566,11 +550,11 @@ long st_kim_stop(void *kim_data) } /* By default configure BT nShutdown to LOW state */ - gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); + gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); mdelay(1); - gpio_set_value(kim_gdata->nshutdown, GPIO_HIGH); + gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_HIGH); mdelay(1); - gpio_set_value(kim_gdata->nshutdown, GPIO_LOW); + gpio_set_value_cansleep(kim_gdata->nshutdown, GPIO_LOW); /* platform specific disable */ if (pdata->chip_disable) @@ -737,53 +721,13 @@ static const struct file_operations list_debugfs_fops = { * board-*.c file */ -static const struct of_device_id kim_of_match[] = { -{ - .compatible = "kim", - }, - {} -}; -MODULE_DEVICE_TABLE(of, kim_of_match); - -static struct ti_st_plat_data *get_platform_data(struct device *dev) -{ - struct device_node *np = dev->of_node; - const u32 *dt_property; - int len; - - dt_pdata = kzalloc(sizeof(*dt_pdata), GFP_KERNEL); - - if (!dt_pdata) - pr_err("Can't allocate device_tree platform data\n"); - - dt_property = of_get_property(np, "dev_name", &len); - if (dt_property) - memcpy(&dt_pdata->dev_name, dt_property, len); - of_property_read_u32(np, "nshutdown_gpio", - &dt_pdata->nshutdown_gpio); - of_property_read_u32(np, "flow_cntrl", &dt_pdata->flow_cntrl); - of_property_read_u32(np, "baud_rate", &dt_pdata->baud_rate); - - return dt_pdata; -} - 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; + struct ti_st_plat_data *pdata = pdev->dev.platform_data; int err; - if (pdev->dev.of_node) - pdata = get_platform_data(&pdev->dev); - else - pdata = pdev->dev.platform_data; - - if (pdata == NULL) { - dev_err(&pdev->dev, "Platform Data is missing\n"); - return -ENXIO; - } - if ((pdev->id != -1) && (pdev->id < MAX_ST_DEVICES)) { /* multiple devices could exist */ st_kim_devices[pdev->id] = pdev; @@ -864,16 +808,9 @@ err_core_init: static int kim_remove(struct platform_device *pdev) { /* free the GPIOs requested */ - struct ti_st_plat_data *pdata; + struct ti_st_plat_data *pdata = pdev->dev.platform_data; struct kim_data_s *kim_gdata; - if (pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = pdev->dev.platform_data; - } - kim_gdata = platform_get_drvdata(pdev); /* Free the Bluetooth/FM/GPIO @@ -891,22 +828,12 @@ static int kim_remove(struct platform_device *pdev) kfree(kim_gdata); kim_gdata = NULL; - kfree(dt_pdata); - dt_pdata = NULL; - return 0; } static int kim_suspend(struct platform_device *pdev, pm_message_t state) { - struct ti_st_plat_data *pdata; - - if (pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = pdev->dev.platform_data; - } + struct ti_st_plat_data *pdata = pdev->dev.platform_data; if (pdata->suspend) return pdata->suspend(pdev, state); @@ -916,14 +843,7 @@ static int kim_suspend(struct platform_device *pdev, pm_message_t state) static int kim_resume(struct platform_device *pdev) { - struct ti_st_plat_data *pdata; - - if (pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = pdev->dev.platform_data; - } + struct ti_st_plat_data *pdata = pdev->dev.platform_data; if (pdata->resume) return pdata->resume(pdev); @@ -940,8 +860,6 @@ static struct platform_driver kim_platform_driver = { .resume = kim_resume, .driver = { .name = "kim", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(kim_of_match), }, }; diff --git a/kernel/drivers/misc/ti-st/st_ll.c b/kernel/drivers/misc/ti-st/st_ll.c index 518e1b7f2..93b4d67cc 100644 --- a/kernel/drivers/misc/ti-st/st_ll.c +++ b/kernel/drivers/misc/ti-st/st_ll.c @@ -26,7 +26,6 @@ #include <linux/ti_wilink_st.h> /**********************************************************************/ - /* internal functions */ static void send_ll_cmd(struct st_data_s *st_data, unsigned char cmd) @@ -54,13 +53,7 @@ static void ll_device_want_to_sleep(struct st_data_s *st_data) /* communicate to platform about chip asleep */ kim_data = st_data->kim_data; - if (kim_data->kim_pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = kim_data->kim_pdev->dev.platform_data; - } - + pdata = kim_data->kim_pdev->dev.platform_data; if (pdata->chip_asleep) pdata->chip_asleep(NULL); } @@ -93,13 +86,7 @@ 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; - if (kim_data->kim_pdev->dev.of_node) { - pr_debug("use device tree data"); - pdata = dt_pdata; - } else { - pdata = kim_data->kim_pdev->dev.platform_data; - } - + pdata = kim_data->kim_pdev->dev.platform_data; if (pdata->chip_awake) pdata->chip_awake(NULL); } |