drivers/power/rk29_charger_display.c

   1
   2 #include <linux/module.h>
   3 #include <linux/init.h>
   4 #include <linux/slab.h>
   5 #include <linux/kernel.h>
   6 #include <linux/errno.h>
   7 #include <linux/delay.h>
   8 #include <linux/power_supply.h>
   9 #include <linux/workqueue.h>
  10 #include <asm/unaligned.h>
  11 #include <mach/gpio.h>
  12 #include <mach/iomux.h>
  13 #include <mach/board.h>
  14 #include <asm/uaccess.h>
  15 #include <linux/power_supply.h>
  16
  17
  18 #if 0
  19 #define DBG(x...)       printk(KERN_INFO x)
  20 #else
  21 #define DBG(x...)
  22 #endif
  23
  24 //#define RK29_PLAY_ON_PIN RK29_PIN6_PA7
  25 //#define MAX_PRE_CNT 2
  26 //#define DET_CNT   5
  27 #define PWR_ON_THRESHD 5       //power on threshd of capacity
  28 //unsigned int   pre_cnt = 0;   //for long press counter
  29 //int charge_disp_mode = 0;
  30 int pwr_on_thrsd = 5;          //power on capcity threshold
  31
  32 //extern int board_boot_mode(void);
  33 //extern int boot_mode_init(char * s);
  34
  35 extern void kernel_power_off(void);
  36
  37 static int __init pwr_on_thrsd_setup(char *str)
  38 {
  39
  40         pwr_on_thrsd = simple_strtol(str,NULL,10);
  41         printk(KERN_INFO "power on threshold:%d",pwr_on_thrsd);
  42         return 0;
  43 }
  44
  45 __setup("pwr_on_thrsd=", pwr_on_thrsd_setup);
  46
  47
  48 LIST_HEAD(rk_psy_head);  //add by yxj for charge logo display  boot_command_line
  49 //int charger_mode=0;           //1:charge,0:not charge
  50 static void add_bootmode_charger_to_cmdline(void)
  51 {
  52         char *pmode=" androidboot.mode=charger";
  53         //int off = strlen(saved_command_line);
  54         char *new_command_line = kzalloc(strlen(saved_command_line) + strlen(pmode) + 1, GFP_KERNEL);
  55         sprintf(new_command_line, "%s%s", saved_command_line, pmode);
  56         saved_command_line = new_command_line;
  57         //strcpy(saved_command_line+off,pmode);
  58
  59         //int off = strlen(boot_command_line);
  60         //strcpy(boot_command_line+off,pmode);
  61
  62         printk("Kernel command line: %s\n", saved_command_line);
  63 }
  64
  65 //display charger logo in kernel CAPACITY
  66
  67
  68 static int  __init start_charge_logo_display(void)
  69 {
  70         union power_supply_propval val_status = {POWER_SUPPLY_STATUS_DISCHARGING};
  71         union power_supply_propval val_capacity ={ 100} ;
  72         struct power_supply *psy;
  73         int online = 0;
  74
  75         printk("start_charge_logo_display\n");
  76
  77         if(board_boot_mode() == BOOT_MODE_RECOVERY)  //recovery mode
  78         {
  79                 printk("recovery mode \n");
  80                 return 0;
  81
  82         }
  83
  84         list_for_each_entry(psy, &rk_psy_head, rk_psy_node)
  85         {
  86                 psy->get_property(psy,POWER_SUPPLY_PROP_ONLINE,&val_status);
  87
  88                 online += val_status.intval;
  89
  90                 psy->get_property(psy,POWER_SUPPLY_PROP_CAPACITY,&val_capacity);
  91         }
  92
  93         if(online >= 1)
  94                 val_status.intval = POWER_SUPPLY_STATUS_CHARGING;
  95
  96         // low power   and  discharging
  97
  98         if((val_capacity.intval < pwr_on_thrsd )&&(val_status.intval != POWER_SUPPLY_STATUS_CHARGING))
  99         {
 100                 printk("low power\n");
 101                 kernel_power_off();
 102                 while(1);
 103                 return 0;
 104         }
 105
 106 /*
 107         //low power and charging
 108         if((val_capacity.intval < pwr_on_thrsd )&&(val_status.intval == POWER_SUPPLY_STATUS_CHARGING))
 109         {
 110                 while((val_capacity.intval < pwr_on_thrsd ))
 111                 {
 112                         list_for_each_entry(psy, &rk_psy_head, rk_psy_node)
 113                         {
 114                                 psy->get_property(psy,POWER_SUPPLY_PROP_CAPACITY,&val_capacity);
 115                         }
 116
 117                         //printk("charging ... \n");
 118                 }
 119         }
 120 */
 121
 122
 123         if(val_status.intval == POWER_SUPPLY_STATUS_CHARGING)
 124         {
 125                 if(board_boot_mode() != BOOT_MODE_REBOOT)   //do not enter power on charge mode when soft  reset
 126             {
 127                         add_bootmode_charger_to_cmdline();
 128                         //boot_mode_init("charge");
 129                         printk("power in charge mode\n");
 130                 }
 131         }
 132
 133         return 0;
 134 }
 135
 136 subsys_initcall_sync(start_charge_logo_display);
 137