--- /dev/null
+/* arm/arch/mach-rk2818/adc.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <mach/rk2818_iomap.h>
+#include <mach/adc.h>
+
+/* This driver is designed to control the usage of the ADC block between
+ * the keyboard and any other drivers that may need to use it.
+ *
+ * Priority will be given to the touchscreen driver, but as this itself is
+ * rate limited it should not starve other requests which are processed in
+ * order that they are received.
+ *
+ * Each user registers to get a client block which uniquely identifies it
+ * and stores information such as the necessary functions to callback when
+ * action is required.
+ */
+
+struct rk28_adc_client {
+ struct platform_device *pdev;
+ struct list_head pend;
+ wait_queue_head_t *wait;
+
+ unsigned int nr_samples;
+ int result;
+ unsigned char is_ts;
+ unsigned char channel;
+
+ void (*select_cb)(struct rk28_adc_client *c, unsigned selected);
+ void (*convert_cb)(struct rk28_adc_client *c,
+ unsigned val1, unsigned val2,
+ unsigned *samples_left);
+};
+
+struct adc_device {
+ struct platform_device *pdev;
+ struct platform_device *owner;
+ struct clk *clk;
+ struct rk28_adc_client *cur;
+ struct rk28_adc_client *ts_pend;
+ void __iomem *regs;
+
+ unsigned int pre_con;
+ int irq;
+};
+
+static struct adc_device *pAdcDev;
+
+static LIST_HEAD(adc_pending);
+
+#define adc_dbg(_adc, msg...) dev_dbg(&(_adc)->pdev->dev, msg)
+
+static inline void rk28_adc_int_enable(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con |= RK28_ADC_INT_ENABLE;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_int_disable(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con &= RK28_ADC_INT_DISABLE;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_int_clear(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con &= RK28_ADC_INT_CLEAR;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_power_up(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con |= RK28_ADC_POWER_UP;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_power_down(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con &= RK28_ADC_POWER_DOWN;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_convert(struct adc_device *adc)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+ con |= RK28_ADC_POWER_UP | RK28_ADC_CONV_START | RK28_ADC_INT_ENABLE;
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static inline void rk28_adc_select(struct adc_device *adc,
+ struct rk28_adc_client *client)
+{
+ unsigned con = readl(adc->regs + RK28_ADCCON);
+
+ client->select_cb(client, 1);
+
+ con &= RK28_ADC_MASK_CH;
+ con &= RK28_ADC_CONV_STOP;
+
+ if (!client->is_ts)
+ con |= RK28_ADC_SEL_CH(client->channel);
+
+ writel(con, adc->regs + RK28_ADCCON);
+}
+
+static void rk28_adc_dbgshow(struct adc_device *adc)
+{
+ adc_dbg(adc, "CON=0x%x, STAS=0x%x, DATA=0x%x\n",
+ readl(adc->regs + RK28_ADCCON),
+ readl(adc->regs + RK28_ADCSTAS),
+ readl(adc->regs + RK28_ADCDAT));
+}
+
+static void rk28_adc_try(struct adc_device *adc)
+{
+ struct rk28_adc_client *next = adc->ts_pend;
+
+ if (!next && !list_empty(&adc_pending)) {
+ next = list_first_entry(&adc_pending,
+ struct rk28_adc_client, pend);
+ list_del(&next->pend);
+ } else
+ adc->ts_pend = NULL;
+
+ if (next) {
+ adc_dbg(adc, "new client is %p\n", next);
+ adc->cur = next;
+ rk28_adc_select(adc, next);
+ rk28_adc_convert(adc);
+ rk28_adc_dbgshow(adc);
+ }
+}
+
+int rk28_adc_start(struct rk28_adc_client *client,
+ unsigned int channel, unsigned int nr_samples)
+{
+ struct adc_device *adc = pAdcDev;
+ unsigned long flags;
+
+ if (!adc) {
+ printk(KERN_ERR "%s: failed to find adc\n", __func__);
+ return -EINVAL;
+ }
+
+ if (client->is_ts && adc->ts_pend)
+ return -EAGAIN;
+
+ local_irq_save(flags);
+
+ client->channel = channel;
+ client->nr_samples = nr_samples;
+
+ if (client->is_ts)
+ adc->ts_pend = client;
+ else
+ list_add_tail(&client->pend, &adc_pending);
+
+ if (!adc->cur)
+ rk28_adc_try(adc);
+ local_irq_restore(flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rk28_adc_start);
+
+static void rk28_convert_done(struct rk28_adc_client *client,
+ unsigned v, unsigned u, unsigned *left)
+{
+ client->result = v;
+ wake_up(client->wait);
+}
+
+int rk28_adc_read(struct rk28_adc_client *client, unsigned int ch)
+{
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wake);
+ int ret;
+
+ client->convert_cb = rk28_convert_done;
+ client->wait = &wake;
+ client->result = -1;
+
+ ret = rk28_adc_start(client, ch, 1);
+ if (ret < 0)
+ goto err;
+
+ ret = wait_event_timeout(wake, client->result >= 0, HZ / 2);
+ if (client->result < 0) {
+ ret = -ETIMEDOUT;
+ goto err;
+ }
+
+ client->convert_cb = NULL;
+ return client->result;
+
+err:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(rk28_adc_read);
+
+static void rk28_adc_default_select(struct rk28_adc_client *client,
+ unsigned select)
+{
+}
+
+struct rk28_adc_client *rk28_adc_register(struct platform_device *pdev,
+ void (*select)(struct rk28_adc_client *client,
+ unsigned int selected),
+ void (*conv)(struct rk28_adc_client *client,
+ unsigned d0, unsigned d1,
+ unsigned *samples_left),
+ unsigned int is_ts)
+{
+ struct rk28_adc_client *client;
+
+ WARN_ON(!pdev);
+
+ if (!select)
+ select = rk28_adc_default_select;
+
+ if (!pdev)
+ return ERR_PTR(-EINVAL);
+
+ client = kzalloc(sizeof(struct rk28_adc_client), GFP_KERNEL);
+ if (!client) {
+ dev_err(&pdev->dev, "no memory for adc client\n");
+ return ERR_PTR(-ENOMEM);
+ }
+
+ client->pdev = pdev;
+ client->is_ts = is_ts;
+ client->select_cb = select;
+ client->convert_cb = conv;
+
+ return client;
+}
+EXPORT_SYMBOL_GPL(rk28_adc_register);
+
+void rk28_adc_release(struct rk28_adc_client *client)
+{
+ /* We should really check that nothing is in progress. */
+ if (pAdcDev->cur == client)
+ pAdcDev->cur = NULL;
+ if (pAdcDev->ts_pend == client)
+ pAdcDev->ts_pend = NULL;
+ else {
+ struct list_head *p, *n;
+ struct rk28_adc_client *tmp;
+
+ list_for_each_safe(p, n, &adc_pending) {
+ tmp = list_entry(p, struct rk28_adc_client, pend);
+ if (tmp == client)
+ list_del(&tmp->pend);
+ }
+ }
+
+ if (pAdcDev->cur == NULL)
+ rk28_adc_try(pAdcDev);
+ kfree(client);
+}
+EXPORT_SYMBOL_GPL(rk28_adc_release);
+
+static irqreturn_t rk28_adc_irq(int irq, void *pw)
+{
+ struct adc_device *adc = pw;
+ struct rk28_adc_client *client = adc->cur;
+ unsigned long flags;
+ unsigned data0, data1 = 0;
+ rk28_adc_int_disable(adc);
+ rk28_adc_int_clear(adc);
+
+ if (!client) {
+ dev_warn(&adc->pdev->dev, "%s: no adc pending\n", __func__);
+ return IRQ_HANDLED;
+ }
+
+ data0 = readl(adc->regs + RK28_ADCDAT);
+
+ adc_dbg(adc, "read %d: 0x%x\n", client->nr_samples, data0);
+
+ client->nr_samples--;
+
+ if (client->convert_cb)
+ (client->convert_cb)(client, data0 & 0x3ff, data1 & 0x3ff,
+ &client->nr_samples);
+
+ if (client->nr_samples > 0) {
+ /* fire another conversion for this */
+
+ client->select_cb(client, 1);
+ rk28_adc_convert(adc);
+ } else {
+ local_irq_save(flags);
+ (client->select_cb)(client, 0);
+ adc->cur = NULL;
+
+ rk28_adc_try(adc);
+ local_irq_restore(flags);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int rk28_adc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct adc_device *adc;
+ struct resource *regs;
+ int ret;
+
+ adc = kzalloc(sizeof(struct adc_device), GFP_KERNEL);
+ if (adc == NULL) {
+ dev_err(dev, "failed to allocate adc_device\n");
+ return -ENOMEM;
+ }
+
+ adc->pdev = pdev;
+
+ adc->irq = platform_get_irq(pdev, 0);
+ if (adc->irq <= 0) {
+ dev_err(dev, "failed to get adc irq\n");
+ ret = -ENOENT;
+ goto err_alloc;
+ }
+
+ ret = request_irq(adc->irq, rk28_adc_irq, 0, dev_name(dev), adc);
+ if (ret < 0) {
+ dev_err(dev, "failed to attach adc irq\n");
+ goto err_alloc;
+ }
+
+ adc->clk = clk_get(dev, "lsadc");
+ if (IS_ERR(adc->clk)) {
+ dev_err(dev, "failed to get adc clock\n");
+ ret = PTR_ERR(adc->clk);
+ goto err_irq;
+ }
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!regs) {
+ dev_err(dev, "failed to find registers\n");
+ ret = -ENXIO;
+ goto err_clk;
+ }
+
+ adc->regs = ioremap(regs->start, resource_size(regs));
+ if (!adc->regs) {
+ dev_err(dev, "failed to map registers\n");
+ ret = -ENXIO;
+ goto err_clk;
+ }
+
+ clk_enable(adc->clk);
+
+ dev_info(dev, "attached adc driver\n");
+
+ platform_set_drvdata(pdev, adc);
+
+ rk28_adc_int_disable(adc);
+ pAdcDev = adc;
+ printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ return 0;
+
+ err_clk:
+ clk_put(adc->clk);
+
+ err_irq:
+ free_irq(adc->irq, adc);
+
+ err_alloc:
+ kfree(adc);
+ return ret;
+}
+
+static int rk28_adc_remove(struct platform_device *pdev)
+{
+ struct adc_device *adc = platform_get_drvdata(pdev);
+ rk28_adc_power_down(adc);
+ iounmap(adc->regs);
+ free_irq(adc->irq, adc);
+ clk_disable(adc->clk);
+ clk_put(adc->clk);
+ kfree(adc);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int rk28_adc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct adc_device *adc = platform_get_drvdata(pdev);
+ u32 con;
+
+ con = readl(adc->regs + RK28_ADCCON);
+ adc->pre_con = con;
+ con &= RK28_ADC_POWER_DOWN;
+ writel(con, adc->regs + RK28_ADCCON);
+
+ clk_disable(adc->clk);
+
+ return 0;
+}
+
+static int rk28_adc_resume(struct platform_device *pdev)
+{
+ struct adc_device *adc = platform_get_drvdata(pdev);
+
+ clk_enable(adc->clk);
+
+ writel(adc->pre_con, adc->regs + RK28_ADCCON);
+ return 0;
+}
+
+#else
+#define rk28_adc_suspend NULL
+#define rk28_adc_resume NULL
+#endif
+
+static struct platform_driver rk28_adc_driver = {
+ .driver = {
+ .name = "rk2818-adc",
+ .owner = THIS_MODULE,
+ },
+ .probe = rk28_adc_probe,
+ .remove = __devexit_p(rk28_adc_remove),
+ .suspend = rk28_adc_suspend,
+ .resume = rk28_adc_resume,
+};
+
+static int __init adc_init(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&rk28_adc_driver);
+ if (ret)
+ printk(KERN_ERR "%s: failed to add adc driver\n", __func__);
+ printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ return ret;
+}
+
+module_init(adc_init);
+MODULE_DESCRIPTION("rk28xx adc driver");
+MODULE_AUTHOR("luowei lw@rock-chips.com");
+MODULE_LICENSE("GPL");
+
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
-#include <mach/rk2818_adc.h>
+#include <mach/adc.h>
-#if 0
+#if 1
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#define AD2KEY5 KEY_0
#define AD2KEY6 KEY_W
+#define KEYMENU AD2KEY6
+#define ENDCALL 62
+
#define Valuedrift 50
#define ADEmpty 1000
-#define ADKEYNum 6
+#define ADInvalid 20
+#define ADKEYNUM 6
#define ADKEYCH 1 //ADͨµÀ
-#define KEY_PHYS_NAME "rk2818 adc key"
+#define KEY_PHYS_NAME "rk2818_adckey/input0"
+
+volatile int gADSampleTimes = 0;
+volatile int gAdcChanel = 0;
+volatile int gAdcValue[4]={0, 0, 0, 0}; //0->ch0 1->ch1 2->ch2 3->ch3
-volatile int ADSampleTimes = 0;
-volatile int ADC_Chanel = 0;
-volatile int ADC_Value[4]={ADEmpty+1, ADEmpty+1, ADEmpty+1, ADEmpty+1}; //0->ch0 1->ch1 2->ch2 3->ch3
+volatile unsigned int gCodeCount = 0;
+volatile unsigned int gThisCode = 0;
+volatile unsigned int gLastCode = 0;
//ADC Registers
typedef struct tagADC_keyst
}ADC_keyst,*pADC_keyst;
// adc ---> key
-static ADC_keyst advaluetab[] =
+static ADC_keyst gAdcValueTab[] =
{
{95, AD2KEY1},
{249, AD2KEY2},
};
//key code tab
-static unsigned char initkey_code[6] =
+static unsigned char gInitKeyCode[ADKEYNUM] =
{
AD2KEY1,AD2KEY2,AD2KEY3,AD2KEY4,AD2KEY5,AD2KEY6
};
struct rk28_adc_client *client;
struct input_dev *input_dev;
struct timer_list timer;
- unsigned char keycodes[6];
-
+ unsigned char keycodes[ADKEYNUM];
struct clk *clk;
void __iomem *mmio_base;
};
-struct rk28_adckey *prk28_adckey;
+struct rk28_adckey *pRk28AdcKey;
unsigned int rk28_get_keycode(unsigned int advalue,pADC_keyst ptab)
{
ret = down_interruptible(&adckey->lock);
if (ret < 0)
return ret;
- if(ADC_Chanel > 3)
- ADC_Chanel = 0;
- ADC_Value[ADC_Chanel] = rk28_adc_read(adckey->client, ADC_Chanel);
- DBG("Enter::%s,LINE=%d,ADC_Value[%d]=%d\n",__FUNCTION__,__LINE__,ADC_Chanel,ADC_Value[ADC_Chanel]);
- ADC_Chanel++;
+ if(gAdcChanel > 3)
+ gAdcChanel = 0;
+ gAdcValue[gAdcChanel] = rk28_adc_read(adckey->client, gAdcChanel);
+ //DBG("Enter::%s,LINE=%d,gAdcValue[%d]=%d\n",__FUNCTION__,__LINE__,gAdcChanel,gAdcValue[gAdcChanel]);
+ gAdcChanel++;
up(&adckey->lock);
return ret;
}
{
unsigned int adcvalue = -1, code;
- prk28_adckey->timer.expires = jiffies+2;
- add_timer(&prk28_adckey->timer);
-#if 1
- if (ADSampleTimes < 2)
+ pRk28AdcKey->timer.expires = jiffies + msecs_to_jiffies(10);
+ add_timer(&pRk28AdcKey->timer);
+
+ if (gADSampleTimes < 4)
{
- ADSampleTimes ++;
+ gADSampleTimes ++;
return;
}
- ADSampleTimes = 0;
-#endif
+ gADSampleTimes = 0;
- rk28_read_adc(prk28_adckey);
- adcvalue = ADC_Value[ADKEYCH];
- if(adcvalue > ADEmpty)
- return;
- printk("adcvalue=0x%x\n",adcvalue);
+ rk28_read_adc(pRk28AdcKey);
+ adcvalue = gAdcValue[ADKEYCH];
+ if((adcvalue > ADEmpty) || (adcvalue < ADInvalid))
+ {
+ if(gLastCode == 0)
+ return;
+ else
+ {
+ if(gLastCode == KEYMENU)
+ {
+ if(gCodeCount > 31)
+ {
+ input_report_key(pRk28AdcKey->input_dev,ENDCALL,0);
+ input_sync(pRk28AdcKey->input_dev);
+ DBG("Enter::%s,LINE=%d,code=%d,ENDCALL,0\n",__FUNCTION__,__LINE__,gLastCode);
+ }
+ input_report_key(pRk28AdcKey->input_dev,gLastCode,1);
+ input_sync(pRk28AdcKey->input_dev);
+ DBG("Enter::%s,LINE=%d,code=%d,1\n",__FUNCTION__,__LINE__,gLastCode);
+ }
+
+ input_report_key(pRk28AdcKey->input_dev,gLastCode,0);
+ input_sync(pRk28AdcKey->input_dev);
+ DBG("Enter::%s,LINE=%d,code=%d,0\n",__FUNCTION__,__LINE__,gLastCode);
+ gLastCode = 0;
+ gCodeCount = 0;
+ return;
+ }
+ }
+
+ DBG("adcvalue=0x%x\n",adcvalue);
- code=rk28_get_keycode(adcvalue,advaluetab);
+ code=rk28_get_keycode(adcvalue,gAdcValueTab);
if(code)
{
- switch(code)
+ if(code == KEYMENU)
{
- case AD2KEY1:
- printk("KEY1\n");
- break;
- case AD2KEY2:
- printk("KEY2\n");
- break;
- case AD2KEY3:
- printk("KEY3\n");
- break;
- case AD2KEY4:
- printk("KEY4\n");
- break;
- case AD2KEY5:
- printk("KEY5\n");
- break;
- case AD2KEY6:
- printk("KEY6\n");
- break;
- default:
- printk("unknow\n");
- break;
+ gLastCode = code;
+ if(++gCodeCount == 31)//40ms * 30 =1.2s
+ {
+ input_report_key(pRk28AdcKey->input_dev,ENDCALL,1);
+ input_sync(pRk28AdcKey->input_dev);
+ DBG("Enter::%s,LINE=%d,code=%d,ENDCALL,1\n",__FUNCTION__,__LINE__,code);
+ }
}
- input_report_key(prk28_adckey->input_dev,code,1);
- input_sync(prk28_adckey->input_dev);
- input_report_key(prk28_adckey->input_dev,code,0);
- input_sync(prk28_adckey->input_dev);
- return;
+ else
+ {
+ gLastCode = code;
+ if(++gCodeCount == 2)//only one event once one touch
+ {
+ input_report_key(pRk28AdcKey->input_dev,code,1);
+ input_sync(pRk28AdcKey->input_dev);
+ DBG("Enter::%s,LINE=%d,code=%d,1\n",__FUNCTION__,__LINE__,code);
+ }
+ }
+
}
-
}
return -ENOMEM;
}
- memcpy(adckey->keycodes, initkey_code, sizeof(adckey->keycodes));
+ memcpy(adckey->keycodes, gInitKeyCode, sizeof(adckey->keycodes));
/* Create and register the input driver. */
input_dev = input_allocate_device();
input_dev->keycode = adckey->keycodes;
input_dev->keycodesize = sizeof(unsigned char);
- input_dev->keycodemax = ARRAY_SIZE(initkey_code);
- for (i = 0; i < ARRAY_SIZE(initkey_code); i++)
- set_bit(initkey_code[i], input_dev->keybit);
+ input_dev->keycodemax = ARRAY_SIZE(gInitKeyCode);
+ for (i = 0; i < ARRAY_SIZE(gInitKeyCode); i++)
+ set_bit(gInitKeyCode[i], input_dev->keybit);
clear_bit(0, input_dev->keybit);
adckey->input_dev = input_dev;
goto failed_free;
}
- prk28_adckey = adckey;
+ pRk28AdcKey = adckey;
/* Register the input device */
error = input_register_device(input_dev);
}
setup_timer(&adckey->timer, rk28_adkeyscan_timer, (unsigned long)adckey);
- //mod_timer(&adckey->timer, 100);
- adckey->timer.expires = jiffies+30;
+ adckey->timer.expires = jiffies+50;
add_timer(&adckey->timer);
- printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ DBG("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
return 0;
failed_free_dev:
int __init rk28_adckey_init(void)
{
- printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ DBG("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
return platform_driver_register(&rk28_adckey_driver);
}
projects / firefly-linux-kernel-4.4.55.git / commitdiff