262 lines
6.2 KiB
C
262 lines
6.2 KiB
C
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/gpio.h>
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#include <linux/err.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/of_gpio.h>
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#include <linux/clk.h>
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#include <linux/rfkill.h>
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#include <linux/regulator/consumer.h>
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#include <linux/platform_device.h>
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#include <linux/sunxi-gpio.h>
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#include "sunxi-rfkill.h"
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static int sunxi_bt_on(struct sunxi_bt_platdata *data, bool on_off)
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{
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struct platform_device *pdev = data->pdev;
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struct device *dev = &pdev->dev;
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int ret = 0;
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if (!on_off && gpio_is_valid(data->gpio_bt_rst))
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gpio_set_value(data->gpio_bt_rst, 0);
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if (data->bt_power_name) {
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data->bt_power = regulator_get(dev, data->bt_power_name);
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if (!IS_ERR(data->bt_power)) {
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if (on_off) {
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ret = regulator_enable(data->bt_power);
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if (ret < 0) {
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dev_err(dev, "regulator bt_power enable failed\n");
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regulator_put(data->bt_power);
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return ret;
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}
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ret = regulator_get_voltage(data->bt_power);
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if (ret < 0) {
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dev_err(dev, "regulator bt_power get voltage failed\n");
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regulator_put(data->bt_power);
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return ret;
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}
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dev_info(dev,
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"check bluetooth bt_power voltage: %d\n",
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ret);
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} else {
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ret = regulator_disable(data->bt_power);
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if (ret < 0) {
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dev_err(dev, "regulator bt_power disable failed\n");
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regulator_put(data->bt_power);
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return ret;
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}
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}
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regulator_put(data->bt_power);
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}
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}
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if (data->io_regulator_name) {
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data->io_regulator = regulator_get(dev,
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data->io_regulator_name);
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if (!IS_ERR(data->io_regulator)) {
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if (on_off) {
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ret = regulator_enable(data->io_regulator);
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if (ret < 0) {
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dev_err(dev, "regulator io_regulator enable failed\n");
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regulator_put(data->io_regulator);
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return ret;
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}
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ret = regulator_get_voltage(data->io_regulator);
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if (ret < 0) {
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dev_err(dev, "regulator io_regulator get voltage failed\n");
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regulator_put(data->io_regulator);
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return ret;
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}
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dev_info(dev,
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"check bluetooth io_regulator voltage: %d\n",
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ret);
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} else {
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ret = regulator_disable(data->io_regulator);
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if (ret < 0) {
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dev_err(dev, "regulator io_regulator disable failed\n");
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regulator_put(data->io_regulator);
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return ret;
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}
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}
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regulator_put(data->io_regulator);
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}
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}
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if (on_off && gpio_is_valid(data->gpio_bt_rst)) {
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mdelay(10);
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gpio_set_value(data->gpio_bt_rst, 1);
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}
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data->power_state = on_off;
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return 0;
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}
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static int sunxi_bt_set_block(void *data, bool blocked)
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{
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struct sunxi_bt_platdata *platdata = data;
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struct platform_device *pdev = platdata->pdev;
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int ret;
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if (blocked != platdata->power_state) {
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dev_warn(&pdev->dev, "block state already is %d\n", blocked);
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return 0;
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}
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dev_info(&pdev->dev, "set block: %d\n", blocked);
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ret = sunxi_bt_on(platdata, !blocked);
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if (ret) {
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dev_err(&pdev->dev, "set block failed\n");
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return ret;
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}
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sunxi_wl_chipen_set(1, !blocked);
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return 0;
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}
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static const struct rfkill_ops sunxi_bt_rfkill_ops = {
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.set_block = sunxi_bt_set_block,
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};
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static int sunxi_bt_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct device *dev = &pdev->dev;
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struct sunxi_bt_platdata *data;
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struct gpio_config config;
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const char *power, *io_regulator;
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int ret = 0;
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data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
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if (!dev)
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return -ENOMEM;
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data->pdev = pdev;
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if (of_property_read_string(np, "bt_power", &power)) {
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dev_warn(dev, "Missing bt_power.\n");
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} else {
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data->bt_power_name = devm_kzalloc(dev, 64, GFP_KERNEL);
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if (!data->bt_power_name)
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return -ENOMEM;
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strcpy(data->bt_power_name, power);
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}
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dev_info(dev, "bt_power_name (%s)\n", data->bt_power_name);
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if (of_property_read_string(np, "bt_io_regulator", &io_regulator)) {
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dev_warn(dev, "Missing bt_io_regulator.\n");
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} else {
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data->io_regulator_name = devm_kzalloc(dev, 64, GFP_KERNEL);
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if (!data->io_regulator_name)
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return -ENOMEM;
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strcpy(data->io_regulator_name, io_regulator);
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}
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dev_info(dev, "io_regulator_name (%s)\n", data->io_regulator_name);
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data->gpio_bt_rst = of_get_named_gpio_flags(np, "bt_rst_n",
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0, (enum of_gpio_flags *)&config);
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if (!gpio_is_valid(data->gpio_bt_rst)) {
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dev_err(dev, "get gpio bt_rst failed\n");
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} else {
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dev_info(dev, "bt_rst gpio=%d mul-sel=%d pull=%d drv_level=%d data=%d\n",
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config.gpio,
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config.mul_sel,
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config.pull,
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config.drv_level,
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config.data);
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ret = devm_gpio_request(dev, data->gpio_bt_rst, "bt_rst");
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if (ret < 0) {
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dev_err(dev, "can't request bt_rst gpio %d\n",
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data->gpio_bt_rst);
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return ret;
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}
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ret = gpio_direction_output(data->gpio_bt_rst, 0);
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if (ret < 0) {
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dev_err(dev, "can't request output direction bt_rst gpio %d\n",
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data->gpio_bt_rst);
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return ret;
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}
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}
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data->lpo = devm_clk_get(dev, NULL);
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if (IS_ERR_OR_NULL(data->lpo)) {
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dev_warn(dev, "clk not config\n");
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} else {
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ret = clk_prepare_enable(data->lpo);
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if (ret < 0)
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dev_warn(dev, "can't enable clk\n");
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}
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data->rfkill = rfkill_alloc("sunxi-bt", dev, RFKILL_TYPE_BLUETOOTH,
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&sunxi_bt_rfkill_ops, data);
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if (!data->rfkill) {
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ret = -ENOMEM;
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goto failed_alloc;
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}
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rfkill_set_states(data->rfkill, true, false);
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ret = rfkill_register(data->rfkill);
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if (ret)
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goto fail_rfkill;
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platform_set_drvdata(pdev, data);
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data->power_state = 0;
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return 0;
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fail_rfkill:
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if (data->rfkill)
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rfkill_destroy(data->rfkill);
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failed_alloc:
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if (!IS_ERR_OR_NULL(data->lpo))
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clk_disable_unprepare(data->lpo);
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return ret;
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}
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static int sunxi_bt_remove(struct platform_device *pdev)
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{
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struct sunxi_bt_platdata *data = platform_get_drvdata(pdev);
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struct rfkill *rfk = data->rfkill;
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platform_set_drvdata(pdev, NULL);
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if (rfk) {
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rfkill_unregister(rfk);
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rfkill_destroy(rfk);
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}
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if (!IS_ERR_OR_NULL(data->lpo))
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clk_disable_unprepare(data->lpo);
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return 0;
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}
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static const struct of_device_id sunxi_bt_ids[] = {
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{ .compatible = "allwinner,sunxi-bt" },
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{ /* Sentinel */ }
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};
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static struct platform_driver sunxi_bt_driver = {
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.probe = sunxi_bt_probe,
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.remove = sunxi_bt_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "sunxi-bt",
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.of_match_table = sunxi_bt_ids,
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},
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};
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module_platform_driver(sunxi_bt_driver);
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MODULE_DESCRIPTION("sunxi bluetooth driver");
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MODULE_LICENSE(GPL);
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