From: 罗伟 <lw@rock-chips.com>
Date: Sat, 15 May 2010 07:42:12 +0000 (+0000)
Subject: luowei add adc driver and adckey driver on 100515
X-Git-Tag: firefly_0821_release~11532
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=843cb7a97dbb96d7064d6a5f30d80b68ccc599a4;p=firefly-linux-kernel-4.4.55.git
luowei add adc driver and adckey driver on 100515
---
diff --git a/arch/arm/mach-rk2818/board-midsdk.c b/arch/arm/mach-rk2818/board-midsdk.c
index 07d127be01a5..f83e4bf10876 100644
--- a/arch/arm/mach-rk2818/board-midsdk.c
+++ b/arch/arm/mach-rk2818/board-midsdk.c
@@ -245,6 +245,35 @@ static struct spi_board_info board_spi_devices[] = {
},
};
+/*ADC*/
+static struct resource rk2818_adc_resource[] = {
+ {
+ .start = IRQ_NR_ADC,
+ .end = IRQ_NR_ADC,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .start = RK2818_ADC_PHYS,
+ .end = RK2818_ADC_PHYS + RK2818_ADC_SIZE - 1,
+ .flags = IORESOURCE_MEM,
+ },
+
+};
+
+struct platform_device rk2818_device_adc = {
+ .name = "rk2818-adc",
+ .id = -1,
+ .num_resources = ARRAY_SIZE(rk2818_adc_resource),
+ .resource = rk2818_adc_resource,
+};
+
+
+struct platform_device rk2818_device_adckey = {
+ .name = "rk2818-adckey",
+ .id = -1,
+ .dev.parent = &rk2818_device_adc.dev,
+};
+
/*rk2818_fb gpio information*/
static struct rk2818_fb_gpio rk2818_fb_gpio_info = {
.lcd_cs = 0,
@@ -278,6 +307,8 @@ static struct platform_device *devices[] __initdata = {
&rk2818_device_i2c1,
#endif
&rk2818_device_spim,
+ &rk2818_device_adc,
+ &rk2818_device_adckey,
&rk2818_device_fb,
};
diff --git a/arch/arm/mach-rk2818/include/mach/rk2818_adc.h b/arch/arm/mach-rk2818/include/mach/rk2818_adc.h
new file mode 100644
index 000000000000..e3df6fd6a45e
--- /dev/null
+++ b/arch/arm/mach-rk2818/include/mach/rk2818_adc.h
@@ -0,0 +1,56 @@
+/* arch/arm/mach-rk28418/include/mach/rk2818_adc.h
+ *
+ * Copyright (c) 2010 luowei <lw@rock-chips.com>
+ *
+ * This program is free software; yosu can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+*/
+
+#ifndef __ASM_ARCH_RK28_ADC_H
+#define __ASM_ARCH_RK28_ADC_H
+
+#define RK28_ADCREG(x) (x)
+#define RK28_ADCDAT RK28_ADCREG(0x00)
+#define RK28_ADCSTAS RK28_ADCREG(0x04)
+#define RK28_ADCCON RK28_ADCREG(0x08)
+
+//ADC_DATA
+#define RK28_ADC_DATA_MASK (0x3ff)
+
+//ADC_STAS
+#define RK28_ADC_STAS_STOP (0)
+
+//ADC_CTRL
+#define RK28_ADC_INT_END (1<<6)
+#define RK28_ADC_INT_CLEAR (~(1<<6))
+#define RK28_ADC_INT_ENABLE (1<<5)
+#define RK28_ADC_INT_DISABLE (~(1<<5))
+#define RK28_ADC_CONV_START (1<<4)
+#define RK28_ADC_CONV_STOP (~(1<<4))
+#define RK28_ADC_POWER_UP (1<<3)
+#define RK28_ADC_POWER_DOWN (~(1<<3))
+#define RK28_ADC_SEL_CH(x) ((x)&0x03)
+#define RK28_ADC_MASK_CH (~(0x03))
+
+struct rk28_adc_client;
+
+extern int rk28_adc_start(struct rk28_adc_client *client,
+ unsigned int channel, unsigned int nr_samples);
+
+extern int rk28_adc_read(struct rk28_adc_client *client, unsigned int ch);
+
+extern struct rk28_adc_client *
+ rk28_adc_register(struct platform_device *pdev,
+ void (*select)(struct rk28_adc_client *client,
+ unsigned selected),
+ void (*conv)(struct rk28_adc_client *client,
+ unsigned d0, unsigned d1,
+ unsigned *samples_left),
+ unsigned int is_ts);
+
+extern void rk28_adc_release(struct rk28_adc_client *client);
+
+#endif
+
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index ee98b1bc5d89..5003bda21d01 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -422,5 +422,14 @@ config KEYBOARD_W90P910
To compile this driver as a module, choose M here: the
module will be called w90p910_keypad.
+config KEYBOARD_RK28ADC
+ tristate "RK2818 ADC Keypad support"
+ depends on ARCH_RK2818
+ default y
+ help
+ Say Y here to enable the adc keypad on SDK board
+ based on RK2818.
+ To compile this driver as a module, choose M here: the
+ module will be called rk2818_adckey.
endif
diff --git a/drivers/input/keyboard/rk2818_adckey.c b/drivers/input/keyboard/rk2818_adckey.c
new file mode 100644
index 000000000000..3f7a839b6505
--- /dev/null
+++ b/drivers/input/keyboard/rk2818_adckey.c
@@ -0,0 +1,352 @@
+/*
+ * linux/drivers/input/keyboard/rk28_adckey.c
+ *
+ * This driver program support to AD key which use for rk28 chip
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/input.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <mach/rk2818_adc.h>
+
+#if 0
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif
+
+//ROCKCHIP AD KEY CODE ,for demo board
+// key ---> EV
+#define AD2KEY1 KEY_ESC
+#define AD2KEY2 KEY_7
+#define AD2KEY3 KEY_8
+#define AD2KEY4 KEY_9
+#define AD2KEY5 KEY_0
+#define AD2KEY6 KEY_W
+
+#define Valuedrift 50
+#define ADEmpty 1000
+#define ADKEYNum 6
+
+#define ADKEYCH 1 //ADͨµÀ
+
+#define KEY_PHYS_NAME "rk2818 adc key"
+
+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
+
+//ADC Registers
+typedef struct tagADC_keyst
+{
+ unsigned int adc_value;
+ unsigned int adc_keycode;
+}ADC_keyst,*pADC_keyst;
+
+// adc ---> key
+static ADC_keyst advaluetab[] =
+{
+ {95, AD2KEY1},
+ {249, AD2KEY2},
+ {406, AD2KEY3},
+ {561, AD2KEY4},
+ {726, AD2KEY5},
+ {899, AD2KEY6},
+ {ADEmpty,0}
+};
+
+//key code tab
+static unsigned char initkey_code[6] =
+{
+ AD2KEY1,AD2KEY2,AD2KEY3,AD2KEY4,AD2KEY5,AD2KEY6
+};
+
+
+struct rk28_adckey
+{
+ struct semaphore lock;
+ struct rk28_adc_client *client;
+ struct input_dev *input_dev;
+ struct timer_list timer;
+ unsigned char keycodes[6];
+
+ struct clk *clk;
+ void __iomem *mmio_base;
+};
+
+struct rk28_adckey *prk28_adckey;
+
+unsigned int rk28_get_keycode(unsigned int advalue,pADC_keyst ptab)
+{
+ while(ptab->adc_value != ADEmpty)
+ {
+ if((advalue > ptab->adc_value - Valuedrift) && (advalue < ptab->adc_value + Valuedrift))
+ return ptab->adc_keycode;
+ ptab++;
+ }
+
+ return 0;
+}
+
+static int rk28_adckey_open(struct input_dev *dev)
+{
+ //struct rk28_adckey *adckey = input_get_drvdata(dev);
+
+ return 0;
+}
+
+static void rk28_adckey_close(struct input_dev *dev)
+{
+ //struct rk28_adckey *adckey = input_get_drvdata(dev);
+//
+}
+
+#ifdef CONFIG_PM
+static int rk28_adckey_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct rk28_adckey *adckey = platform_get_drvdata(pdev);
+
+ clk_disable(adckey->clk);
+ return 0;
+}
+
+static int rk28_adckey_resume(struct platform_device *pdev)
+{
+ struct rk28_adckey *adckey = platform_get_drvdata(pdev);
+ struct input_dev *input_dev = adckey->input_dev;
+
+ mutex_lock(&input_dev->mutex);
+
+ if (input_dev->users) {
+ /* Enable unit clock */
+ clk_enable(adckey->clk);
+ }
+
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+#else
+#define rk28_adckey_suspend NULL
+#define rk28_adckey_resume NULL
+#endif
+
+//read four ADC chanel
+static int rk28_read_adc(struct rk28_adckey *adckey)
+{
+ int ret;
+
+ 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++;
+ up(&adckey->lock);
+ return ret;
+}
+
+static void rk28_adkeyscan_timer(unsigned long data)
+{
+ unsigned int adcvalue = -1, code;
+
+ prk28_adckey->timer.expires = jiffies+2;
+ add_timer(&prk28_adckey->timer);
+#if 1
+ if (ADSampleTimes < 2)
+ {
+ ADSampleTimes ++;
+ return;
+ }
+
+ ADSampleTimes = 0;
+#endif
+
+ rk28_read_adc(prk28_adckey);
+ adcvalue = ADC_Value[ADKEYCH];
+ if(adcvalue > ADEmpty)
+ return;
+ printk("adcvalue=0x%x\n",adcvalue);
+
+ code=rk28_get_keycode(adcvalue,advaluetab);
+ if(code)
+ {
+ switch(code)
+ {
+ 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;
+ }
+ 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;
+ }
+
+
+}
+
+
+static int __devinit rk28_adckey_probe(struct platform_device *pdev)
+{
+ struct rk28_adckey *adckey;
+ struct input_dev *input_dev;
+ int error,i;
+
+ adckey = kzalloc(sizeof(struct rk28_adckey), GFP_KERNEL);
+ if (adckey == NULL) {
+ dev_err(&pdev->dev, "failed to allocate driver data\n");
+ return -ENOMEM;
+ }
+
+ memcpy(adckey->keycodes, initkey_code, sizeof(adckey->keycodes));
+
+ /* Create and register the input driver. */
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(&pdev->dev, "failed to allocate input device\n");
+ error = -ENOMEM;
+ goto failed_put_clk;
+ }
+
+ input_dev->name = pdev->name;
+ //input_dev->id.bustype = BUS_HOST;
+ input_dev->open = rk28_adckey_open;
+ input_dev->close = rk28_adckey_close;
+ input_dev->dev.parent = &pdev->dev;
+ input_dev->phys = KEY_PHYS_NAME;
+ input_dev->id.vendor = 0x0001;
+ input_dev->id.product = 0x0001;
+ input_dev->id.version = 0x0100;
+
+ 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);
+ clear_bit(0, input_dev->keybit);
+
+ adckey->input_dev = input_dev;
+ input_set_drvdata(input_dev, adckey);
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) ;
+
+// rk28_adckey_build_keycode(adckey);
+ platform_set_drvdata(pdev, adckey);
+
+ init_MUTEX(&adckey->lock);
+
+ /* Register with the core ADC driver. */
+ adckey->client = rk28_adc_register(pdev, NULL, NULL, 0);
+ if (IS_ERR(adckey->client)) {
+ dev_err(&pdev->dev, "cannot register adc\n");
+ error = PTR_ERR(adckey->client);
+ goto failed_free;
+ }
+
+ prk28_adckey = adckey;
+
+ /* Register the input device */
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(&pdev->dev, "failed to register input device\n");
+ goto failed_free_dev;
+ }
+
+ setup_timer(&adckey->timer, rk28_adkeyscan_timer, (unsigned long)adckey);
+ //mod_timer(&adckey->timer, 100);
+ adckey->timer.expires = jiffies+30;
+ add_timer(&adckey->timer);
+ printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ return 0;
+
+failed_free_dev:
+ platform_set_drvdata(pdev, NULL);
+ input_free_device(input_dev);
+failed_put_clk:
+ //clk_put(adckey->clk);
+failed_free:
+ kfree(adckey);
+ return error;
+}
+
+static int __devexit rk28_adckey_remove(struct platform_device *pdev)
+{
+ struct rk28_adckey *adckey = platform_get_drvdata(pdev);
+
+ input_unregister_device(adckey->input_dev);
+ input_free_device(adckey->input_dev);
+ platform_set_drvdata(pdev, NULL);
+ rk28_adc_release(adckey->client);
+ kfree(adckey);
+ return 0;
+}
+
+static struct platform_driver rk28_adckey_driver =
+{
+ .probe = rk28_adckey_probe,
+ .remove = __devexit_p(rk28_adckey_remove),
+ .suspend = rk28_adckey_suspend,
+ .resume = rk28_adckey_resume,
+ .driver = {
+ .name = "rk2818-adckey",
+ .owner = THIS_MODULE,
+ },
+};
+
+ int __init rk28_adckey_init(void)
+{
+ printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
+ return platform_driver_register(&rk28_adckey_driver);
+}
+
+static void __exit rk28_adckey_exit(void)
+{
+ platform_driver_unregister(&rk28_adckey_driver);
+}
+
+module_init(rk28_adckey_init);
+module_exit(rk28_adckey_exit);
+
+MODULE_DESCRIPTION("rk2818 adc Key Controller Driver");
+MODULE_AUTHOR("luowei lw@rock-chips.com");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index d21b3469f6d7..5b8df3df0498 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -125,5 +125,6 @@ source "drivers/staging/sep/Kconfig"
source "drivers/staging/iio/Kconfig"
+source "drivers/staging/rk2818/Kconfig"
endif # !STAGING_EXCLUDE_BUILD
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index b516268957d0..0da3c0b529c2 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -44,3 +44,4 @@ obj-$(CONFIG_VME_BUS) += vme/
obj-$(CONFIG_RAR_REGISTER) += rar/
obj-$(CONFIG_DX_SEP) += sep/
obj-$(CONFIG_IIO) += iio/
+obj-$(CONFIG_RK28) += rk28/
diff --git a/drivers/staging/rk2818/Kconfig b/drivers/staging/rk2818/Kconfig
new file mode 100644
index 000000000000..558c75a37d82
--- /dev/null
+++ b/drivers/staging/rk2818/Kconfig
@@ -0,0 +1,14 @@
+#
+# RK28XX ADC configuration
+#
+menuconfig RK28
+ tristate "RK28 Staging Driver"
+ depends on ARCH_RK2818
+
+if RK28
+config RK28_ADC
+ tristate "RK28 ADC Driver"
+ default y
+ ---help---
+ RK28 ADC Driver
+endif #RK28
diff --git a/drivers/staging/rk2818/Makefile b/drivers/staging/rk2818/Makefile
new file mode 100644
index 000000000000..632089443594
--- /dev/null
+++ b/drivers/staging/rk2818/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_RK28_ADC) += rk2818_adc.o
diff --git a/drivers/staging/rk2818/rk2818_adc.c b/drivers/staging/rk2818/rk2818_adc.c
new file mode 100644
index 000000000000..9fb5b8ed4eb3
--- /dev/null
+++ b/drivers/staging/rk2818/rk2818_adc.c
@@ -0,0 +1,469 @@
+/* arch/arm/plat-s3c24xx/adc.c
+ *
+ * Copyright (c) 2008 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>, <ben-linux@fluff.org>
+ *
+ * S3C24XX ADC device core
+ *
+ * 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/rk2818_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 *adc_dev;
+
+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 = adc_dev;
+ 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 (adc_dev->cur == client)
+ adc_dev->cur = NULL;
+ if (adc_dev->ts_pend == client)
+ adc_dev->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 (adc_dev->cur == NULL)
+ rk28_adc_try(adc_dev);
+ 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);
+ adc_dev = 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");
+