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Commit ad03fb17 authored by Umesh Vats's avatar Umesh Vats Committed by Gerrit - the friendly Code Review server
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bluetooth: add support for retrieving power resource values 



Added support for retrieving and logging values for various power
resources used by bluetooth driver.

Change-Id: Ia92d6570ef93ca76fc68546e6466df80ec1cf397
Signed-off-by: default avatarUmesh Vats <uvats@codeaurora.org>
parent 8f9e8265

drivers/bluetooth/btpower.c

+144 −4
Original line number Diff line number Diff line
@@ -218,8 +218,9 @@ static int bt_configure_gpios(int on) 
{

	int rc = 0;

	int bt_reset_gpio = bt_power_pdata->bt_gpio_sys_rst;



	pr_debug("%s: bt_gpio= %d on: %d\n", __func__, bt_reset_gpio, on);

	int bt_sw_ctrl_gpio  =  bt_power_pdata->bt_gpio_sw_ctrl;

	int bt_debug_gpio  =  bt_power_pdata->bt_gpio_debug;

	int assert_dbg_gpio = 0;



	if (on) {

		rc = gpio_request(bt_reset_gpio, "bt_sys_rst_n");
@@ -235,16 +236,66 @@ static int bt_configure_gpios(int on) 
			return rc;

		}

		msleep(50);

		pr_debug("BTON:Turn Bt Off bt-reset-gpio(%d) value(%d)\n",

			bt_reset_gpio, gpio_get_value(bt_reset_gpio));

		if (bt_sw_ctrl_gpio >= 0) {

			pr_debug("BTON:Turn Bt Off\n");

			pr_debug("bt-sw-ctrl-gpio(%d) value(%d)\n",

				bt_sw_ctrl_gpio,

				gpio_get_value(bt_sw_ctrl_gpio));

		}



		rc = gpio_direction_output(bt_reset_gpio, 1);

		if (rc) {

			pr_err("%s: Unable to set direction\n", __func__);

			return rc;

		}

		msleep(50);

		/*  Check  if  SW_CTRL  is  asserted  */

		if  (bt_sw_ctrl_gpio  >=  0)  {

			rc  =  gpio_direction_input(bt_sw_ctrl_gpio);

			if  (rc)  {

				pr_err("%s:SWCTRL Dir Set Problem:%d\n",

					__func__, rc);

			}  else  if  (!gpio_get_value(bt_sw_ctrl_gpio))  {

				/* SW_CTRL not asserted, assert debug GPIO */

				if  (bt_debug_gpio  >=  0)

					assert_dbg_gpio = 1;

			}

		}

		if (assert_dbg_gpio) {

			rc  =  gpio_request(bt_debug_gpio, "bt_debug_n");

			if  (rc)  {

				pr_err("unable to request Debug Gpio\n");

			}  else  {

				rc = gpio_direction_output(bt_debug_gpio,  1);

				if (rc)

					pr_err("%s:Prob Set Debug-Gpio\n",

						__func__);

			}

		}

		pr_info("BTON:Turn Bt On bt-reset-gpio(%d) value(%d)\n",

			bt_reset_gpio, gpio_get_value(bt_reset_gpio));

		if (bt_sw_ctrl_gpio >= 0) {

			pr_debug("BTON:Turn Bt On\n");

			pr_debug("bt-sw-ctrl-gpio(%d) value(%d)\n",

				bt_sw_ctrl_gpio,

				gpio_get_value(bt_sw_ctrl_gpio));

		}

	} else {

		gpio_set_value(bt_reset_gpio, 0);

		msleep(100);

		pr_debug("BT-OFF:bt-reset-gpio(%d) value(%d)\n",

			bt_reset_gpio, gpio_get_value(bt_reset_gpio));

		if (bt_sw_ctrl_gpio >= 0) {

			pr_debug("BT-OFF:bt-sw-ctrl-gpio(%d) value(%d)\n",

				bt_sw_ctrl_gpio,

				gpio_get_value(bt_sw_ctrl_gpio));

		}

	}



	pr_debug("%s: bt_gpio= %d on: %d\n", __func__, bt_reset_gpio, on);



	return rc;

}
@@ -287,6 +338,10 @@ static int bluetooth_power(int on) 
gpio_fail:

		if (bt_power_pdata->bt_gpio_sys_rst > 0)

			gpio_free(bt_power_pdata->bt_gpio_sys_rst);

		if  (bt_power_pdata->bt_gpio_sw_ctrl  >  0)

			gpio_free(bt_power_pdata->bt_gpio_sw_ctrl);

		if  (bt_power_pdata->bt_gpio_debug  >  0)

			gpio_free(bt_power_pdata->bt_gpio_debug);

		if (bt_power_pdata->bt_chip_clk)

			bt_clk_disable(bt_power_pdata->bt_chip_clk);

clk_fail:
@@ -589,6 +644,18 @@ static int bt_power_populate_dt_pinfo(struct platform_device *pdev) 
			pr_err("%s: bt-reset-gpio not provided in device tree\n",

				__func__);



		bt_power_pdata->bt_gpio_sw_ctrl  =

			of_get_named_gpio(pdev->dev.of_node,

						"qca,bt-sw-ctrl-gpio",  0);

		if (bt_power_pdata->bt_gpio_sw_ctrl < 0)

			pr_err("bt-sw_ctrl-gpio not provided in devicetree\n");



		bt_power_pdata->bt_gpio_debug  =

			of_get_named_gpio(pdev->dev.of_node,

						"qca,bt-debug-gpio",  0);

		if (bt_power_pdata->bt_gpio_debug < 0)

			pr_err("bt-debug-gpio not provided in devicetree\n");



		rc = bt_dt_parse_clk_info(&pdev->dev,

					&bt_power_pdata->bt_chip_clk);

		if (rc < 0)
@@ -683,10 +750,45 @@ int btpower_get_chipset_version(void) 
}

EXPORT_SYMBOL(btpower_get_chipset_version);



static long get_resource_value(char *res_name)

{

	int ret = 0;

	int i = 0;

	long value = -1;

	struct bt_power_vreg_data *vreg;



	for (; i < BT_VREG_INFO_SIZE; i++) {

		vreg = &bt_power_pdata->vreg_info[i];



		if (!vreg->reg)

			continue;

		else {

			if (strnstr(vreg->name, res_name,

					strlen(vreg->name)))

				break;

		}

	}

	if (i < BT_VREG_INFO_SIZE) {

		if (regulator_is_enabled(vreg->reg)) {

			value = (int)regulator_get_voltage(vreg->reg);

			pr_debug("%s:%s value(%d)\n",

				__func__, res_name, value);

			ret = value;

		} else {

			pr_err("%s:%s not configure/enabled\n",

				__func__, res_name);

			ret = -EINVAL;

		}

	}



	return ret;

}



static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)

{

	int ret = 0, pwr_cntrl = 0;

	int chipset_version = 0;

	long value = -1;



	switch (cmd) {

	case BT_CMD_SLIM_TEST:
@@ -718,7 +820,7 @@ static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
		break;

	case BT_CMD_CHIPSET_VERS:

		chipset_version = (int)arg;

		pr_err("%s: BT_CMD_CHIP_VERS soc_version:%x\n", __func__,

		pr_err("%s: unified Current SOC Version : %x\n", __func__,

			chipset_version);

		if (chipset_version) {

			soc_id = chipset_version;
@@ -740,6 +842,44 @@ static long bt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 
			ret = -EINVAL;

		}

		break;

	case BT_CMD_GETVAL_RESET_GPIO:

		if (bt_power_pdata->bt_gpio_sys_rst > 0) {

			value = (long)gpio_get_value(

				bt_power_pdata->bt_gpio_sys_rst);

			pr_debug("%s:GET_RESET_GPIO(%d) value(%d)\n",

				bt_power_pdata->bt_gpio_sys_rst,

				__func__, value);

			ret = value;

		} else {

			pr_err("%s: RESET_GPIO not configured\n", __func__);

			ret = -EINVAL;

		}

		break;

	case BT_CMD_GETVAL_SW_CTRL_GPIO:

		if (bt_power_pdata->bt_gpio_sw_ctrl > 0) {

			value = (long)gpio_get_value(

				bt_power_pdata->bt_gpio_sw_ctrl);

			pr_debug("%s:GET_SWCTRL_GPIO(%d) value(%d)\n",

				bt_power_pdata->bt_gpio_sw_ctrl,

					__func__, value);

			ret = value;

		} else {

			pr_err("%s:SW_CTRL_GPIO not configured\n", __func__);

			ret = -EINVAL;

		}

		break;

	case BT_CMD_GETVAL_VDD_AON_LDO:

		ret = get_resource_value("vdd-aon");

		break;

	case BT_CMD_GETVAL_VDD_DIG_LDO:

		ret = get_resource_value("vdd-dig");

		break;

	case BT_CMD_GETVAL_VDD_RFA1_LDO:

		ret = get_resource_value("vdd-rfa1");

		break;

	case BT_CMD_GETVAL_VDD_RFA2_LDO:

		ret = get_resource_value("vdd-rfa2");

		break;

	default:

		return -ENOIOCTLCMD;

	}

include/linux/btpower.h

+8 −0
Original line number Diff line number Diff line
@@ -39,6 +39,8 @@ struct bt_power_clk_data { 
 */

struct bluetooth_power_platform_data {

	int bt_gpio_sys_rst;                   /* Bluetooth reset gpio */

	int bt_gpio_sw_ctrl;                   /* Bluetooth sw_ctrl gpio */

	int bt_gpio_debug;                     /* Bluetooth debug gpio */

	struct device *slim_dev;

	struct bt_power_vreg_data *vreg_info;  /* VDDIO voltage regulator */

	struct bt_power_clk_data *bt_chip_clk; /* bluetooth reference clock */
@@ -53,4 +55,10 @@ int btpower_get_chipset_version(void); 
#define BT_CMD_PWR_CTRL			0xbfad

#define BT_CMD_CHIPSET_VERS		0xbfae

#define BT_CMD_GET_CHIPSET_ID		0xbfaf

#define BT_CMD_GETVAL_RESET_GPIO    0xbfb5

#define BT_CMD_GETVAL_SW_CTRL_GPIO  0xbfb0

#define BT_CMD_GETVAL_VDD_AON_LDO   0xbfb1

#define BT_CMD_GETVAL_VDD_DIG_LDO   0xbfb2

#define BT_CMD_GETVAL_VDD_RFA1_LDO  0xbfb3

#define BT_CMD_GETVAL_VDD_RFA2_LDO  0xbfb4

#endif /* __LINUX_BLUETOOTH_POWER_H */