On Wed, Oct 13, 2010 at 4:21 PM, <csanjay@xxxxxxxxxxxxxxxxxxxx> wrote:
> From: Sanjay Kumar Champati <csanjay@xxxxxxxxxxxxxxxxxxxx>
>
> * Midified "tty_io.c" and "Kconfig" files to suuport BT enable for WL1271
>
> Signed-off-by: Sanjay Kumar Champati <csanjay@xxxxxxxxxxxxxxxxxxxx>
> ---
> 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
>
> --
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>
Cannot pollute tty_io.c with omap-evm platform specific things
tty_io.c is a file part of generic tty-layer stack we cannot have
any platform specific things there.
bt_init_power
tty_setbt_power
All are one time configuration don't see why it needs
to be done with ioctl interface.
Can be done in board file itself.
---
Regards,
Govindraj.R
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