./kernel/arch/arm/mach-sc8810/include/mach/regs_global.h
./u-boot/arch/arm/include/asm/arch-sc8810/regs_global.h
./mach-sc8810/board-sp8810/gpio_cfg.c gpio配置規劃
kernel/arch/arm/mach-sc8810/include/mach/regs_gpio.h:
#define GPIO_BASE SPRD_GPIO_BASE
#define GPIO_PG_BASE GPIO_BASE
#define GPI_PG0_BASE GPIO_BASE
kernel/arch/arm/mach-sc8810/include/mach/hardware.h:
#define SPRD_GPIO_BASE 0xE0031000
kernel/arch/arm/mach-sc8810/include/mach/adi_hal_internal.h 定義了GPIO的實體位址和虛拟位址之間的轉換函數
#define ADI_PHYS SPRD_MISC_PHYS//0x82000000
#define __adi_virt_to_phys(x) ((x) - SPRD_ADI_BASE + ADI_PHYS)
#define __adi_phy_to_virt(x) ((x)-ADI_PHYS + SPRD_ADI_BASE) // x-0x82000000+0xE0037000; 就是x+0x5E037000,也就是 虛拟位址到實體位址的偏移是 0x5E037000, 與 函數中的不符！！！
SC8810 Device Spec.pdf 的p102頁 表5-1 SC8810重新開機之後的記憶體位址映射表 中 指明了
0x80000000~0x8fffffff 為外設位址空間，其中0x82000480為GPIO(模拟控制功能段)的基位址（在0x820005ff結束）； 0x8A000000為剩下的一段 GPIO的基位址。GPIO所有的基位址請參考：6.8.4節P507頁内容
kernel/arch/arm/mach-sc8810/include/mach/regs_adi.h
./mach-sc8810/include/mach/hardware.h 中定義了硬體實體位址和虛拟位址的映射關系，及硬體位址相關的宏
特别重要的一個宏是 #define SPRD_MISC_BASE 0xE0037000，其他很多宏都是在這個宏的基礎上進行偏移的。
#define SPRD_GPIO_BASE 0xE0031000 //虛拟位址
#define SPRD_GPIO_PHYS 0x8a000000 //實體位址
#define SPRD_GPIO_SIZE SZ_4K
#define SPRD_MISC_BASE 0xE0037000 //MISC類 子產品的虛拟位址
#define SPRD_MISC_PHYS 0x82000000 //MISC類 子產品的實體位址
#define SPRD_MISC_SIZE SZ_4K //那麼實體位址到虛拟位址的偏移為：
//0xE0037000-0x82000000 =0x5E037000
//正好是 __adi_phy_to_virt 的轉換偏移；
./mach-sc8810/include/mach/regs_adi.h: #define SPRD_ADI_BASE SPRD_MISC_BASE//0xE0037000
./mach-sc8810/include/mach/regs_adi.h: #define ADI_BASE SPRD_ADI_BASE //0x82000000
./mach-sc8810/include/mach/regs_gpio.h: #define GPIO_BASE SPRD_GPIO_BASE
./mach-sc8810/include/mach/board.h
定義了gpio的某些struct和一些全局變量（ int sprd_3rdparty_gpio_tp_rst; int sprd_3rdparty_gpio_tp_irq; ）
./mach-sc8810/include/mach/board.h :
struct sprd_platform_data
{
void (*panel_power)(int on);
unsigned has_vsync_irq:1;
};
//這個是gpio_cfg.c檔案中用到的結構，定義了一個gpio_initdata結構數組。
struct gpio_initdata {
int* gpio;
int io;
};
kernel/arch/arm/mach-sc8810/gpio.c
gpio各種操作函數的定義
mach-sc8810/include/mach/gpio.h
//定義了一些GPIO相關的宏，比如gpio号的最大值、最小值
#include <linux/init.h>
#define GPIO_MIN_PIN_NUM 16
#define GPIO_MAX_PIN_NUM (205 + 16)
//定義充電探測口
#define CHARGER_DETECT_GPIO 162
//定義USB的口
#define USB_DM_GPIO 145
#define USB_DP_GPIO 146
#define ARCH_NR_GPIOS GPIO_MAX_PIN_NUM// TODO: steve.zhan
//特别注意：這裡定義了 gpio_get_value等函數，linux核心也有這個函數的實作（貌似加入了BUG_ON的宏）。kernel/include/asm-generic/gpio.h
#define gpio_get_value __gpio_get_value
#define gpio_set_value __gpio_set_value
#define gpio_to_irq __gpio_to_irq
定義各種操作的宏
#define GPIO_DEFAUT_HIGH (1 << 31)
#define GPIO_DEFAUT_LOW (0 << 31)
#define GPIO_DIRECTION_OUTPUT (1 << 30)
#define GPIO_DIRECTION_INPUT (1 << 29)
#define GPIO_LOGIC_TRUE (1<< 28)
#define GPIO_LOGIC_FALSE (0 << 28)
#define GPIO_INDEX_MAX (0xffff)
extern __must_check int sprd_alloc_gpio_irq(unsigned gpio);
extern int irq_to_gpio(unsigned long irq);
extern void sprd_free_gpio_irq(int irq);
#include <asm-generic/gpio.h>
extern void __init sprd_gpio_init(void);
//-----------------
kernel/arch/arm/mach-sc8810/gpio_phy.h 中的 __get_base_addr 函數說明：
#define NR_D_DIE_GPIOS 147
static __inline u32 __get_base_addr (u32 gpio_id)
{
if (gpio_id > NR_D_DIE_GPIOS) //148~159保留
{
if (gpio_id < 176 + 16) //手冊上 （176+16）号gpio之前的基位址都是0x80的step，
return __adi_phy_to_virt(0x82000480);//GPIO(模拟控制)的基位址；另外還有小于這個區段的GPIO号的基位址是0x8A000000;
return __adi_phy_to_virt(0x820004c0);//超過192号GPIO其基位址就是0x820004c0，中間沒有步進0x80
}
return ((gpio_id>>4) -1) * 0x80 + (u32) GPIO_BASE;//<=147号的GPIO口的基位址//GPIO_BASE:0xE0031000;
//可以假定,0x8a0000000 的虛拟位址是 0xE0031000,
//那麼虛拟位址到實體位址的偏移是：0x56031000 ,
//這個值與 __adi_phy_to_virt 這個宏轉換機制不一樣。難道這段GPIO是用的另外一個偏移來映射的？
}
/
#define SPRD_MISC_BASE 0xE0037000 // 虛拟位址；
#define SPRD_MISC_PHYS 0x82000000 // 實體位址；
#define SPRD_MISC_SIZE SZ_4K //映射區域大小；
*/
--reference-end--------;
//Analog die register define for 8810 fixed begin
#define SPRD_ANA_BASE (SPRD_MISC_BASE + 0x600)
#define ANA_REG_BASE SPRD_ANA_BASE // 0x82000600
#define ANA_AGEN (ANA_REG_BASE + 0x00)
#define ANA_MODULE_ARM_RST (ANA_REG_BASE + 0x04)
#define ANA_LDO_PD_SET (ANA_REG_BASE+ 0x08)
#define ANA_LDO_PD_RST (ANA_REG_BASE + 0x0C)
#define ANA_LDO_PD_CTL0 (ANA_REG_BASE + 0x10)
#define ANA_LDO_PD_CTL1 (ANA_REG_BASE + 0x14) //(0xE0037000 +0x600)+0x14 = 0xE0037614(虛拟位址)
//對應的實體位址是0x82000000 +0x600 + 0x14
#define ANA_LDO_VCTL0 (ANA_REG_BASE + 0x18)
#define ANA_LDO_VCTL1 (ANA_REG_BASE + 0x1C)
#define ANA_LDO_VCTL2 (ANA_REG_BASE + 0x20)
#define ANA_LDO_VCTL3 (ANA_REG_BASE + 0x24)
#define ANA_LDO_VCTL4 (ANA_REG_BASE + 0x28)
#define ANA_LDO_SLP0 (ANA_REG_BASE + 0x2C)
#define ANA_LDO_SLP1 (ANA_REG_BASE + 0x30)
#define ANA_LDO_SLP2 (ANA_REG_BASE + 0x34)
#define ANA_DCDC_CTRL (ANA_REG_BASE + 0x38)
#define ANA_DCDC_CTRL_DS (ANA_REG_BASE + 0x3C)
#define ANA_DCDC_CTRL_CAL (ANA_REG_BASE + 0x40)
#define ANA_DCDCARM_CTRL (ANA_REG_BASE + 0x44)
#define ANA_DCDCARM_CTRL_CAL (ANA_REG_BASE + 0x48)
#define ANA_PLL_CTRL (ANA_REG_BASE + 0x4C)
#define ANA_APLLMN (ANA_REG_BASE + 0x50)
#define ANA_APLLWAIT (ANA_REG_BASE + 0x54)
#define ANA_RTC_CTRL (ANA_REG_BASE + 0x58)
#define ANA_TRF_CTRL (ANA_REG_BASE + 0x5C)
#define ANA_CHGR_CTRL0 (ANA_REG_BASE + 0X60)
#define ANA_CHGR_CTRL1 (ANA_REG_BASE + 0X64)
#define ANA_LED_CTRL (ANA_REG_BASE + 0X68)
#define ANA_VIBRATOR_CTRL0 (ANA_REG_BASE + 0X6C)
#define ANA_VIBRATOR_CTRL1 (ANA_REG_BASE + 0X70)
#define ANA_AUDIO_CTRL (ANA_REG_BASE + 0X74)
#define ANA_AUDIO_PA_CTRL0 (ANA_REG_BASE + 0X78)
#define ANA_AUDIO_PA_CTRL1 (ANA_REG_BASE + 0X7C)
#define ANA_MIXED_CTRL (ANA_REG_BASE + 0X80)
#define ANA_STATUS (ANA_REG_BASE + 0X84)
#define ANA_RST_STATUS (ANA_REG_BASE + 0X88)
#define ANA_MCU_WR_PROT (ANA_REG_BASE + 0X8C)
#define ANA_VIBR_WR_PROT (ANA_REG_BASE + 0X90)
#define ANA_INT_CPI_DEBUG (ANA_REG_BASE + 0X94)
#define ANA_HWRST_RTC (ANA_REG_BASE + 0X98)
#define ANA_IF_SPR_CTRL (ANA_REG_BASE + 0X9C)
#define ANA_CHIP_ID_LOW (ANA_REG_BASE + 0XF8)
#define ANA_CHIP_ID_HIGH (ANA_REG_BASE + 0XFC)
#define ANA_CHGR_CTL0 ANA_CHGR_CTRL0
#define ANA_CHGR_CTL1 ANA_CHGR_CTRL1
//fixed end