359 lines
8.8 KiB
C
Executable File
359 lines
8.8 KiB
C
Executable File
#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/interrupt.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/sys_config.h>
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struct sunxi_wlan_platdata {
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int bus_index;
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struct regulator *wlan_power;
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struct regulator *io_regulator;
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struct clk *lpo;
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int gpio_wlan_regon;
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int gpio_wlan_hostwake;
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char *wlan_power_name;
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char *io_regulator_name;
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int power_state;
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struct platform_device *pdev;
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};
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static struct sunxi_wlan_platdata *wlan_data = NULL;
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static int sunxi_wlan_on(struct sunxi_wlan_platdata *data, bool on_off);
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static DEFINE_MUTEX(sunxi_wlan_mutex);
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void sunxi_wlan_set_power(bool on_off)
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{
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struct platform_device *pdev;
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int ret = 0;
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if(!wlan_data)
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return;
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pdev = wlan_data->pdev;
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mutex_lock(&sunxi_wlan_mutex);
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if(on_off != wlan_data->power_state){
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ret = sunxi_wlan_on(wlan_data, on_off);
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if(ret)
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dev_err(&pdev->dev,"set power failed\n");
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}
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mutex_unlock(&sunxi_wlan_mutex);
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}
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EXPORT_SYMBOL_GPL(sunxi_wlan_set_power);
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int sunxi_wlan_get_bus_index(void)
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{
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struct platform_device *pdev;
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if(!wlan_data)
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return -EINVAL;
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pdev = wlan_data->pdev;
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dev_info(&pdev->dev,"bus_index: %d\n",wlan_data->bus_index);
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return wlan_data->bus_index;
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}
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EXPORT_SYMBOL_GPL(sunxi_wlan_get_bus_index);
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int sunxi_wlan_get_oob_irq(void)
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{
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struct platform_device *pdev;
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int host_oob_irq = 0;
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if(!wlan_data || !gpio_is_valid(wlan_data->gpio_wlan_hostwake))
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return 0;
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pdev = wlan_data->pdev;
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host_oob_irq = gpio_to_irq(wlan_data->gpio_wlan_hostwake);
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if (IS_ERR_VALUE(host_oob_irq))
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dev_err(&pdev->dev,"map gpio [%d] to virq failed, errno = %d\n",
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wlan_data->gpio_wlan_hostwake,host_oob_irq);
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return host_oob_irq;
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}
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EXPORT_SYMBOL_GPL(sunxi_wlan_get_oob_irq);
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int sunxi_wlan_get_oob_irq_flags(void)
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{
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int oob_irq_flags;
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if(!wlan_data)
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return 0;
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oob_irq_flags = (IRQF_TRIGGER_HIGH | IRQF_SHARED | IRQF_NO_SUSPEND);
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return oob_irq_flags;
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}
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EXPORT_SYMBOL_GPL(sunxi_wlan_get_oob_irq_flags);
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static int sunxi_wlan_on(struct sunxi_wlan_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_wlan_regon))
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gpio_set_value(data->gpio_wlan_regon, 0);
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if(data->wlan_power_name){
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data->wlan_power = regulator_get(dev, data->wlan_power_name);
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if (!IS_ERR(data->wlan_power)) {
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if(on_off){
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ret = regulator_enable(data->wlan_power);
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if (ret < 0){
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dev_err(dev, "regulator wlan_power enable failed\n");
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regulator_put(data->wlan_power);
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return ret;
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}
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ret = regulator_get_voltage(data->wlan_power);
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if (ret < 0){
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dev_err(dev, "regulator wlan_power get voltage failed\n");
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regulator_put(data->wlan_power);
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return ret;
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}
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dev_info(dev, "check wlan wlan_power voltage: %d\n",ret);
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}else{
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ret = regulator_disable(data->wlan_power);
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if (ret < 0){
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dev_err(dev, "regulator wlan_power disable failed\n");
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regulator_put(data->wlan_power);
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return ret;
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}
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}
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regulator_put(data->wlan_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, 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, "check wlan io_regulator voltage: %d\n",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_wlan_regon)){
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mdelay(10);
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gpio_set_value(data->gpio_wlan_regon, 1);
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}
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wlan_data->power_state = on_off;
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return 0;
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}
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static ssize_t power_state_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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return sprintf(buf, "%d\n", wlan_data->power_state);
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}
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static ssize_t power_state_store(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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unsigned long state;
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int err;
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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err = kstrtoul(buf, 0, &state);
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if (err)
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return err;
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if (state > 1 )
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return -EINVAL;
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mutex_lock(&sunxi_wlan_mutex);
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if(state != wlan_data->power_state){
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err = sunxi_wlan_on(wlan_data, state);
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if(err)
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dev_err(dev,"set power failed\n");
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}
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mutex_unlock(&sunxi_wlan_mutex);
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return count;
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}
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static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR,
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power_state_show, power_state_store);
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static int sunxi_wlan_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_wlan_platdata *data;
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struct gpio_config config;
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u32 val;
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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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wlan_data = data;
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data->bus_index = -1;
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if (!of_property_read_u32(np, "wlan_busnum", &val)) {
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switch (val) {
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case 0:
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case 1:
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case 2:
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data->bus_index = val;
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break;
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default:
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dev_err(dev, "unsupported wlan_busnum (%u)\n", val);
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return -EINVAL;
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}
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}
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dev_info(dev, "wlan_busnum (%u)\n", val);
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if (of_property_read_string(np, "wlan_power", &power)) {
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dev_warn(dev, "Missing wlan_power.\n");
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}else{
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data->wlan_power_name = devm_kzalloc(dev, 64, GFP_KERNEL);
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if(!data->wlan_power_name)
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return -ENOMEM;
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else
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strcpy(data->wlan_power_name,power);
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}
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dev_info(dev, "wlan_power_name (%s)\n", data->wlan_power_name);
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if (of_property_read_string(np, "wlan_io_regulator", &io_regulator)) {
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dev_warn(dev, "Missing wlan_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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else
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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_wlan_regon = of_get_named_gpio_flags(np, "wlan_regon", 0, (enum of_gpio_flags *)&config);
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if (!gpio_is_valid(data->gpio_wlan_regon)) {
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dev_err(dev, "get gpio wlan_regon failed\n");
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}else{
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dev_info(dev,"wlan_regon 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_wlan_regon, "wlan_regon");
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if (ret < 0) {
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dev_err(dev,"can't request wlan_regon gpio %d\n",
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data->gpio_wlan_regon);
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return ret;
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}
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ret = gpio_direction_output(data->gpio_wlan_regon, 0);
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if (ret < 0) {
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dev_err(dev,"can't request output direction wlan_regon gpio %d\n",
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data->gpio_wlan_regon);
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return ret;
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}
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}
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data->gpio_wlan_hostwake = of_get_named_gpio_flags(np, "wlan_hostwake", 0, (enum of_gpio_flags *)&config);
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if (!gpio_is_valid(data->gpio_wlan_hostwake)) {
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dev_err(dev, "get gpio wlan_hostwake failed\n");
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}else{
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dev_info(dev,"wlan_hostwake 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_wlan_hostwake, "wlan_hostwake");
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if (ret < 0) {
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dev_err(dev,"can't request wlan_hostwake gpio %d\n",
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data->gpio_wlan_hostwake);
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return ret;
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}
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gpio_direction_input(data->gpio_wlan_hostwake);
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if (ret < 0) {
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dev_err(dev,"can't request input direction wlan_hostwake gpio %d\n",
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data->gpio_wlan_hostwake);
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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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device_create_file(dev, &dev_attr_power_state);
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data->power_state = 0;
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return 0;
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}
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static int sunxi_wlan_remove(struct platform_device *pdev)
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{
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device_remove_file(&pdev->dev, &dev_attr_power_state);
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if (!IS_ERR_OR_NULL(wlan_data->lpo))
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clk_disable_unprepare(wlan_data->lpo);
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return 0;
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}
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static const struct of_device_id sunxi_wlan_ids[] = {
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{ .compatible = "allwinner,sunxi-wlan" },
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{ /* Sentinel */ }
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};
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static struct platform_driver sunxi_wlan_driver = {
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.probe = sunxi_wlan_probe,
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.remove = sunxi_wlan_remove,
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.driver = {
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.owner = THIS_MODULE,
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.name = "sunxi-wlan",
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.of_match_table = sunxi_wlan_ids,
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},
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};
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module_platform_driver(sunxi_wlan_driver);
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MODULE_DESCRIPTION("sunxi wlan driver");
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MODULE_LICENSE(GPL); |