mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-10 12:57:06 +09:00
luowei add adc driver and adckey driver on 100515
This commit is contained in:
罗伟
@@ -245,6 +245,35 @@ static struct spi_board_info board_spi_devices[] = {
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},
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};
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/*ADC*/
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static struct resource rk2818_adc_resource[] = {
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{
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.start = IRQ_NR_ADC,
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.end = IRQ_NR_ADC,
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.flags = IORESOURCE_IRQ,
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},
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{
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.start = RK2818_ADC_PHYS,
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.end = RK2818_ADC_PHYS + RK2818_ADC_SIZE - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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struct platform_device rk2818_device_adc = {
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.name = "rk2818-adc",
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.id = -1,
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.num_resources = ARRAY_SIZE(rk2818_adc_resource),
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.resource = rk2818_adc_resource,
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};
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struct platform_device rk2818_device_adckey = {
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.name = "rk2818-adckey",
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.id = -1,
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.dev.parent = &rk2818_device_adc.dev,
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};
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/*rk2818_fb gpio information*/
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static struct rk2818_fb_gpio rk2818_fb_gpio_info = {
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.lcd_cs = 0,
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@@ -278,6 +307,8 @@ static struct platform_device *devices[] __initdata = {
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&rk2818_device_i2c1,
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#endif
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&rk2818_device_spim,
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&rk2818_device_adc,
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&rk2818_device_adckey,
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&rk2818_device_fb,
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};
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56
arch/arm/mach-rk2818/include/mach/rk2818_adc.h
Normal file
56
arch/arm/mach-rk2818/include/mach/rk2818_adc.h
Normal file
@@ -0,0 +1,56 @@
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/* arch/arm/mach-rk28418/include/mach/rk2818_adc.h
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*
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* Copyright (c) 2010 luowei <lw@rock-chips.com>
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*
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* This program is free software; yosu can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#ifndef __ASM_ARCH_RK28_ADC_H
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#define __ASM_ARCH_RK28_ADC_H
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#define RK28_ADCREG(x) (x)
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#define RK28_ADCDAT RK28_ADCREG(0x00)
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#define RK28_ADCSTAS RK28_ADCREG(0x04)
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#define RK28_ADCCON RK28_ADCREG(0x08)
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//ADC_DATA
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#define RK28_ADC_DATA_MASK (0x3ff)
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//ADC_STAS
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#define RK28_ADC_STAS_STOP (0)
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//ADC_CTRL
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#define RK28_ADC_INT_END (1<<6)
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#define RK28_ADC_INT_CLEAR (~(1<<6))
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#define RK28_ADC_INT_ENABLE (1<<5)
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#define RK28_ADC_INT_DISABLE (~(1<<5))
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#define RK28_ADC_CONV_START (1<<4)
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#define RK28_ADC_CONV_STOP (~(1<<4))
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#define RK28_ADC_POWER_UP (1<<3)
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#define RK28_ADC_POWER_DOWN (~(1<<3))
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#define RK28_ADC_SEL_CH(x) ((x)&0x03)
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#define RK28_ADC_MASK_CH (~(0x03))
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struct rk28_adc_client;
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extern int rk28_adc_start(struct rk28_adc_client *client,
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unsigned int channel, unsigned int nr_samples);
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extern int rk28_adc_read(struct rk28_adc_client *client, unsigned int ch);
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extern struct rk28_adc_client *
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rk28_adc_register(struct platform_device *pdev,
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void (*select)(struct rk28_adc_client *client,
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unsigned selected),
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void (*conv)(struct rk28_adc_client *client,
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unsigned d0, unsigned d1,
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unsigned *samples_left),
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unsigned int is_ts);
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extern void rk28_adc_release(struct rk28_adc_client *client);
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#endif
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@@ -422,5 +422,14 @@ config KEYBOARD_W90P910
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To compile this driver as a module, choose M here: the
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module will be called w90p910_keypad.
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config KEYBOARD_RK28ADC
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tristate "RK2818 ADC Keypad support"
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depends on ARCH_RK2818
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default y
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help
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Say Y here to enable the adc keypad on SDK board
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based on RK2818.
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To compile this driver as a module, choose M here: the
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module will be called rk2818_adckey.
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endif
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352
drivers/input/keyboard/rk2818_adckey.c
Normal file
352
drivers/input/keyboard/rk2818_adckey.c
Normal file
@@ -0,0 +1,352 @@
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/*
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* linux/drivers/input/keyboard/rk28_adckey.c
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*
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* This driver program support to AD key which use for rk28 chip
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/input.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/delay.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <mach/rk2818_adc.h>
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#if 0
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#define DBG(x...) printk(x)
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#else
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#define DBG(x...)
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#endif
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//ROCKCHIP AD KEY CODE ,for demo board
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// key ---> EV
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#define AD2KEY1 KEY_ESC
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#define AD2KEY2 KEY_7
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#define AD2KEY3 KEY_8
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#define AD2KEY4 KEY_9
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#define AD2KEY5 KEY_0
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#define AD2KEY6 KEY_W
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#define Valuedrift 50
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#define ADEmpty 1000
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#define ADKEYNum 6
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#define ADKEYCH 1 //ADͨ<44><CDA8>
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#define KEY_PHYS_NAME "rk2818 adc key"
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volatile int ADSampleTimes = 0;
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volatile int ADC_Chanel = 0;
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volatile int ADC_Value[4]={ADEmpty+1, ADEmpty+1, ADEmpty+1, ADEmpty+1}; //0->ch0 1->ch1 2->ch2 3->ch3
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//ADC Registers
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typedef struct tagADC_keyst
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{
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unsigned int adc_value;
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unsigned int adc_keycode;
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}ADC_keyst,*pADC_keyst;
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// adc ---> key
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static ADC_keyst advaluetab[] =
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{
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{95, AD2KEY1},
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{249, AD2KEY2},
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{406, AD2KEY3},
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{561, AD2KEY4},
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{726, AD2KEY5},
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{899, AD2KEY6},
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{ADEmpty,0}
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};
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//key code tab
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static unsigned char initkey_code[6] =
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{
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AD2KEY1,AD2KEY2,AD2KEY3,AD2KEY4,AD2KEY5,AD2KEY6
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};
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struct rk28_adckey
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{
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struct semaphore lock;
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struct rk28_adc_client *client;
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struct input_dev *input_dev;
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struct timer_list timer;
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unsigned char keycodes[6];
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struct clk *clk;
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void __iomem *mmio_base;
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};
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struct rk28_adckey *prk28_adckey;
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unsigned int rk28_get_keycode(unsigned int advalue,pADC_keyst ptab)
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{
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while(ptab->adc_value != ADEmpty)
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{
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if((advalue > ptab->adc_value - Valuedrift) && (advalue < ptab->adc_value + Valuedrift))
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return ptab->adc_keycode;
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ptab++;
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}
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return 0;
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}
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static int rk28_adckey_open(struct input_dev *dev)
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{
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//struct rk28_adckey *adckey = input_get_drvdata(dev);
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return 0;
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}
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static void rk28_adckey_close(struct input_dev *dev)
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{
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//struct rk28_adckey *adckey = input_get_drvdata(dev);
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//
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}
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#ifdef CONFIG_PM
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static int rk28_adckey_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct rk28_adckey *adckey = platform_get_drvdata(pdev);
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clk_disable(adckey->clk);
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return 0;
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}
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static int rk28_adckey_resume(struct platform_device *pdev)
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{
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struct rk28_adckey *adckey = platform_get_drvdata(pdev);
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struct input_dev *input_dev = adckey->input_dev;
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mutex_lock(&input_dev->mutex);
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if (input_dev->users) {
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/* Enable unit clock */
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clk_enable(adckey->clk);
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}
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mutex_unlock(&input_dev->mutex);
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return 0;
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}
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#else
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#define rk28_adckey_suspend NULL
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#define rk28_adckey_resume NULL
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#endif
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//read four ADC chanel
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static int rk28_read_adc(struct rk28_adckey *adckey)
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{
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int ret;
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ret = down_interruptible(&adckey->lock);
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if (ret < 0)
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return ret;
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if(ADC_Chanel > 3)
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ADC_Chanel = 0;
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ADC_Value[ADC_Chanel] = rk28_adc_read(adckey->client, ADC_Chanel);
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DBG("Enter::%s,LINE=%d,ADC_Value[%d]=%d\n",__FUNCTION__,__LINE__,ADC_Chanel,ADC_Value[ADC_Chanel]);
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ADC_Chanel++;
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up(&adckey->lock);
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return ret;
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}
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static void rk28_adkeyscan_timer(unsigned long data)
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{
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unsigned int adcvalue = -1, code;
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prk28_adckey->timer.expires = jiffies+2;
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add_timer(&prk28_adckey->timer);
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#if 1
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if (ADSampleTimes < 2)
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{
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ADSampleTimes ++;
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return;
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}
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ADSampleTimes = 0;
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#endif
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rk28_read_adc(prk28_adckey);
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adcvalue = ADC_Value[ADKEYCH];
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if(adcvalue > ADEmpty)
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return;
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printk("adcvalue=0x%x\n",adcvalue);
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code=rk28_get_keycode(adcvalue,advaluetab);
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if(code)
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{
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switch(code)
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{
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case AD2KEY1:
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printk("KEY1\n");
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break;
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case AD2KEY2:
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printk("KEY2\n");
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break;
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case AD2KEY3:
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printk("KEY3\n");
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break;
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case AD2KEY4:
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printk("KEY4\n");
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break;
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case AD2KEY5:
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printk("KEY5\n");
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break;
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case AD2KEY6:
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printk("KEY6\n");
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break;
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default:
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printk("unknow\n");
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break;
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}
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input_report_key(prk28_adckey->input_dev,code,1);
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input_sync(prk28_adckey->input_dev);
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input_report_key(prk28_adckey->input_dev,code,0);
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input_sync(prk28_adckey->input_dev);
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return;
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}
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}
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static int __devinit rk28_adckey_probe(struct platform_device *pdev)
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{
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struct rk28_adckey *adckey;
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struct input_dev *input_dev;
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int error,i;
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adckey = kzalloc(sizeof(struct rk28_adckey), GFP_KERNEL);
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if (adckey == NULL) {
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dev_err(&pdev->dev, "failed to allocate driver data\n");
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return -ENOMEM;
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}
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memcpy(adckey->keycodes, initkey_code, sizeof(adckey->keycodes));
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/* Create and register the input driver. */
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input_dev = input_allocate_device();
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if (!input_dev) {
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dev_err(&pdev->dev, "failed to allocate input device\n");
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error = -ENOMEM;
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goto failed_put_clk;
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}
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input_dev->name = pdev->name;
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//input_dev->id.bustype = BUS_HOST;
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input_dev->open = rk28_adckey_open;
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input_dev->close = rk28_adckey_close;
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input_dev->dev.parent = &pdev->dev;
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input_dev->phys = KEY_PHYS_NAME;
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input_dev->id.vendor = 0x0001;
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input_dev->id.product = 0x0001;
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input_dev->id.version = 0x0100;
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input_dev->keycode = adckey->keycodes;
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input_dev->keycodesize = sizeof(unsigned char);
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input_dev->keycodemax = ARRAY_SIZE(initkey_code);
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for (i = 0; i < ARRAY_SIZE(initkey_code); i++)
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set_bit(initkey_code[i], input_dev->keybit);
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clear_bit(0, input_dev->keybit);
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adckey->input_dev = input_dev;
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input_set_drvdata(input_dev, adckey);
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input_dev->evbit[0] = BIT_MASK(EV_KEY) ;
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// rk28_adckey_build_keycode(adckey);
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platform_set_drvdata(pdev, adckey);
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init_MUTEX(&adckey->lock);
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/* Register with the core ADC driver. */
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adckey->client = rk28_adc_register(pdev, NULL, NULL, 0);
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if (IS_ERR(adckey->client)) {
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dev_err(&pdev->dev, "cannot register adc\n");
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error = PTR_ERR(adckey->client);
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goto failed_free;
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}
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prk28_adckey = adckey;
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/* Register the input device */
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error = input_register_device(input_dev);
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if (error) {
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dev_err(&pdev->dev, "failed to register input device\n");
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goto failed_free_dev;
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}
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setup_timer(&adckey->timer, rk28_adkeyscan_timer, (unsigned long)adckey);
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//mod_timer(&adckey->timer, 100);
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adckey->timer.expires = jiffies+30;
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add_timer(&adckey->timer);
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printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
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return 0;
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failed_free_dev:
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platform_set_drvdata(pdev, NULL);
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input_free_device(input_dev);
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failed_put_clk:
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//clk_put(adckey->clk);
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failed_free:
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kfree(adckey);
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return error;
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}
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static int __devexit rk28_adckey_remove(struct platform_device *pdev)
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{
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struct rk28_adckey *adckey = platform_get_drvdata(pdev);
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input_unregister_device(adckey->input_dev);
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input_free_device(adckey->input_dev);
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platform_set_drvdata(pdev, NULL);
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rk28_adc_release(adckey->client);
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kfree(adckey);
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return 0;
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}
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|
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static struct platform_driver rk28_adckey_driver =
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{
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.probe = rk28_adckey_probe,
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.remove = __devexit_p(rk28_adckey_remove),
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.suspend = rk28_adckey_suspend,
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.resume = rk28_adckey_resume,
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.driver = {
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.name = "rk2818-adckey",
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.owner = THIS_MODULE,
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},
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};
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int __init rk28_adckey_init(void)
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{
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printk("Enter::%s,LINE=%d\n",__FUNCTION__,__LINE__);
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return platform_driver_register(&rk28_adckey_driver);
|
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}
|
||||
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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");
|
||||
|
||||
@@ -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
|
||||
|
||||
@@ -44,3 +44,4 @@ obj-$(CONFIG_VME_BUS) += vme/
|
||||
obj-$(CONFIG_RAR_REGISTER) += rar/
|
||||
obj-$(CONFIG_DX_SEP) += sep/
|
||||
obj-$(CONFIG_IIO) += iio/
|
||||
obj-$(CONFIG_RK28) += rk28/
|
||||
|
||||
14
drivers/staging/rk2818/Kconfig
Normal file
14
drivers/staging/rk2818/Kconfig
Normal file
@@ -0,0 +1,14 @@
|
||||
#
|
||||
# RK28XX ADC configuration
|
||||
#
|
||||
menuconfig RK28
|
||||
tristate "RK28 Staging Driver"
|
||||
depends on ARCH_RK2818
|
||||
|
||||
if RK28
|
||||
config RK28_ADC
|
||||
tristate "RK28 ADC Driver"
|
||||
default y
|
||||
---help---
|
||||
RK28 ADC Driver
|
||||
endif #RK28
|
||||
1
drivers/staging/rk2818/Makefile
Normal file
1
drivers/staging/rk2818/Makefile
Normal file
@@ -0,0 +1 @@
|
||||
obj-$(CONFIG_RK28_ADC) += rk2818_adc.o
|
||||
469
drivers/staging/rk2818/rk2818_adc.c
Normal file
469
drivers/staging/rk2818/rk2818_adc.c
Normal file
@@ -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");
|
||||
|
||||
Reference in New Issue
Block a user