From: Sanjay Kumar Champati <[email protected]> * Midified "tty_io.c" and "Kconfig" files to suuport BT enable for WL1271
Signed-off-by: Sanjay Kumar Champati <[email protected]> --- drivers/bluetooth/Kconfig | 7 +++ drivers/char/tty_io.c | 110 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 117 insertions(+), 0 deletions(-) diff --git a/drivers/bluetooth/Kconfig b/drivers/bluetooth/Kconfig index 652367a..2ed159c 100644 --- a/drivers/bluetooth/Kconfig +++ b/drivers/bluetooth/Kconfig @@ -195,5 +195,12 @@ config BT_MRVL_SDIO Say Y here to compile support for Marvell BT-over-SDIO driver into the kernel or say M to compile it as module. +config BT_WL1271 + bool "WL1271 Bluetooth driver support" + depends on BT_HCIUART + help + The core driver to support WL1271 Bluetooth devices. + Say Y here to compile WL1271 Bluetooth driver into the kernel. + endmenu diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c index f15df40..a3ae352 100644 --- a/drivers/char/tty_io.c +++ b/drivers/char/tty_io.c @@ -107,6 +107,17 @@ #include <linux/kmod.h> #include <linux/nsproxy.h> +#ifdef CONFIG_BT_WL1271 +/* + * WL1271: To control T2 gpios on OMAP3 EVM + */ +#include "linux/i2c/twl.h" + +/* + * WL1271: To set BT_EN of TI's WL1271 Bluetooth chip + */ +#define TIOSETWL1271POWER 0x6000 +#endif #undef TTY_DEBUG_HANGUP #define TTY_PARANOIA_CHECK 1 @@ -154,6 +165,95 @@ static void release_tty(struct tty_struct *tty, int idx); static void __proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); static void proc_set_tty(struct task_struct *tsk, struct tty_struct *tty); +#ifdef CONFIG_BT_WL1271 +/* + * WL1271: Power enable sequence + */ +static int bt_init_power(void) +{ + int ret = 0; + u8 reg_value = 0; + + /* Wl1271 Daughter card BT_EN is connected to T2-GPIO.13 */ + /* Enable GPIO */ + ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, + ®_value, REG_GPIO_CTRL); + if (ret != 0) + goto err; + /* T2-GPIO.13 -> output */ + ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, + ®_value, REG_GPIODATADIR2); + if (ret != 0) + goto err; + reg_value |= 0x20; + ret = twl_i2c_write_u8(TWL4030_MODULE_GPIO, + reg_value, REG_GPIODATADIR2); + if (ret != 0) + goto err; + /* T2-GPIO.13 -> LOW */ + ret = twl_i2c_read_u8(TWL4030_MODULE_GPIO, + ®_value, REG_GPIODATAOUT2); + if (ret != 0) + goto err; + reg_value &= ~(0x20); + ret = twl_i2c_write_u8(TWL4030_MODULE_GPIO, + reg_value, REG_GPIODATAOUT2); + if (ret != 0) + goto err; + + mdelay(50); + /* T2-GPIO.13 -> HIGH */ + reg_value |= (0x20); + ret = twl_i2c_write_u8(TWL4030_MODULE_GPIO, + reg_value, REG_GPIODATAOUT2); + if (ret != 0) + goto err; + + mdelay(50); + /* T2-GPIO.13 -> LOW */ + reg_value &= ~(0x20); + ret = twl_i2c_write_u8(TWL4030_MODULE_GPIO, + reg_value, REG_GPIODATAOUT2); + if (ret != 0) + goto err; + printk(KERN_INFO "WL1271: BT_EN GPIO initialized\n"); +err: + return ret; +} /* End of init_bt_power() */ + +/* + * WL1271: Set Bluetooth Enable + */ +static int tty_setbt_power(int __user *p) +{ + int power; + int err = 0; + u8 reg_value = 0; + + if (get_user(power, p)) + return -EFAULT; + + printk(KERN_INFO "Set BT_EN of WL1271\n"); + /* Power settings argument should either be 1 or 0 */ + power = power ? 1 : 0; + + if (power) + reg_value |= (0x20); + else + reg_value &= ~(0x20); + + err = twl_i2c_write_u8(TWL4030_MODULE_GPIO, + reg_value, REG_GPIODATAOUT2); + if (err != 0) { + printk(KERN_DEBUG "WL1271: Set BT_EN failed %d %d\n", + err, power); + return err; + } + printk(KERN_INFO "WL1271: Powering %s\n", power ? "on" : "off"); + return 0; +} /* End of set_bt_power() */ +#endif + /** * alloc_tty_struct - allocate a tty object * @@ -2571,6 +2671,11 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case TIOCMBIC: case TIOCMBIS: return tty_tiocmset(tty, file, cmd, p); +#ifdef CONFIG_BT_WL1271 + /* Control BT_EN pin of Bluetooth-WL1271 */ + case TIOSETWL1271POWER: + return tty_setbt_power(p); +#endif case TCFLSH: switch (arg) { case TCIFLUSH: @@ -3142,6 +3247,11 @@ static int __init tty_init(void) #ifdef CONFIG_VT vty_init(&console_fops); #endif + +#ifdef CONFIG_BT_WL1271 + /* Initialize Bluetooth- WL1271chip connected to UART */ + bt_init_power(); +#endif return 0; } module_init(tty_init); -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
