arch/arm/mach-pxa/h1900/h1900_power.c

   1 /*
   2  * Power and APM status driver for iPAQ h1910/h1915
   3  *
   4  * Use consistent with the GNU GPL is permitted,
   5  * provided that this copyright notice is
   6  * preserved in its entirety in all copies and derived works.
   7  *
   8  * Copyright (C) 2005-2006 Pawel Kolodziejski
   9  * Copyright (C) 2003 Joshua Wise
  10  *
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/kernel.h>
  16 #include <linux/tty.h>
  17 #include <linux/sched.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/bootmem.h>
  21 #include <linux/lcd.h>
  22 #include <linux/backlight.h>
  23 #include <linux/fb.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/soc/asic3_base.h>
  26 #include <linux/soc/tmio_mmc.h>
  27
  28 #include <asm/irq.h>
  29 #include <asm/mach-types.h>
  30 #include <asm/hardware.h>
  31 #include <asm/setup.h>
  32 #include <asm/io.h>
  33
  34 #include <asm/mach/irq.h>
  35 #include <asm/mach/arch.h>
  36 #include <asm/mach/map.h>
  37 #include <asm/mach/irda.h>
  38 #include <asm/arch/h1900-asic.h>
  39 #include <asm/arch/h1900-gpio.h>
  40 #include <asm/arch/ipaq.h>
  41 #include <asm/arch/udc.h>
  42 #include <asm/arch/pxafb.h>
  43
  44 #include <asm/arch/pxa-regs.h>
  45 #include <asm/arch/pxa-pm_ll.h>
  46 #include <asm/arch/irq.h>
  47 #include <asm/types.h>
  48 #include <asm/apm.h>
  49
  50 #include "../generic.h"
  51
  52 int battery_power;
  53 extern struct platform_device h1900_asic3;
  54 #define asic3 &h1900_asic3.dev
  55
  56 static u32 *addr_sig;
  57 static u32 save_sig;
  58
  59 unsigned long h1900_ssp_putget(ulong data);
  60 void h1900_set_led(int color, int duty_time, int cycle_time);
  61
  62 static void h1900_pxa_ll_pm_suspend(unsigned long resume_addr)
  63 {
  64         save_sig = *addr_sig;
  65         *addr_sig = 0x4C494E42; // LINB signature for bootloader while resume
  66 }
  67
  68 static void h1900_pxa_ll_pm_resume(void)
  69 {
  70         *addr_sig = save_sig;
  71 }
  72
  73 static struct pxa_ll_pm_ops h1900_ll_pm_ops = {
  74         .suspend = h1900_pxa_ll_pm_suspend,
  75         .resume  = h1900_pxa_ll_pm_resume,
  76 };
  77
  78 void h1900_ll_pm_init(void)
  79 {
  80         addr_sig = phys_to_virt(0xa0a00000);
  81         pxa_pm_set_ll_ops(&h1900_ll_pm_ops);
  82 }
  83
  84 static irqreturn_t h1900_charge(int irq, void *dev_id, struct pt_regs *regs)
  85 {
  86         int charge;
  87
  88         if (!(GPLR(GPIO_NR_H1900_AC_IN_N) & GPIO_bit(GPIO_NR_H1900_AC_IN_N)) &&
  89                         (GPLR(GPIO_NR_H1900_MBAT_IN) & GPIO_bit(GPIO_NR_H1900_MBAT_IN))  )
  90                 charge = 1;
  91         else
  92                 charge = 0;
  93
  94         if (charge) {
  95                 int dtime;
  96
  97                 if (GPLR(GPIO_NR_H1900_CHARGING) & GPIO_bit(GPIO_NR_H1900_CHARGING)) {
  98                         dtime = 0x80;
  99                 } else {
 100                         dtime = 0x101;
 101                 }
 102                 asic3_set_led(asic3, 1, dtime, 0x100);
 103                 asic3_set_led(asic3, 0, dtime, 0x100);
 104                 GPSR(GPIO_NR_H1900_CHARGER_EN) = GPIO_bit(GPIO_NR_H1900_CHARGER_EN);
 105         } else {
 106                 asic3_set_led(asic3, 1, 0, 0x100);
 107                 asic3_set_led(asic3, 0, 0, 0x100);
 108                 GPCR(GPIO_NR_H1900_CHARGER_EN) = GPIO_bit(GPIO_NR_H1900_CHARGER_EN);
 109         };
 110
 111         return IRQ_HANDLED;
 112 };
 113
 114 static struct irqaction h1900_charge_irq = {
 115         name:     "h1910/h1915 charge",
 116         handler:  h1900_charge,
 117         flags:    SA_INTERRUPT
 118 };
 119
 120 #ifdef CONFIG_PM
 121
 122 #define CTRL_START  0x80
 123 #define CTRL_AUX_N  0x64
 124 #define CTRL_PD0    0x01
 125
 126 static void h1900_battery(void)
 127 {
 128         int sample;
 129
 130         sample = h1900_ssp_putget(CTRL_PD0 | CTRL_START | CTRL_AUX_N); // main battery: max - 4096, min - 3300
 131         h1900_ssp_putget(CTRL_START | CTRL_AUX_N);
 132
 133         battery_power = ((sample - 3300) * 100) / 796;
 134
 135         if (!!(GPLR(GPIO_NR_H1900_AC_IN_N) & GPIO_bit(GPIO_NR_H1900_AC_IN_N))) {
 136                 if (battery_power > 50) {
 137                         asic3_set_led(asic3, 1, 0, 0x100);
 138                         asic3_set_led(asic3, 0, 0, 0x100);
 139                 } else if ((battery_power < 50) && (battery_power > 10)) {
 140                         h1900_set_led(H1900_GREEN_LED, 0x101, 0x100);
 141                 } else if (battery_power < 10) {
 142                         h1900_set_led(H1900_RED_LED, 0x101, 0x100);
 143                 }
 144         }
 145
 146         //printk("bat: %d\n", battery_power);
 147 }
 148
 149 typedef void (*apm_get_power_status_t)(struct apm_power_info*);
 150
 151 static void h1900_apm_get_power_status(struct apm_power_info *info)
 152 {
 153         h1900_battery();
 154
 155         info->battery_life = battery_power;
 156
 157         if (!(GPLR(GPIO_NR_H1900_AC_IN_N) & GPIO_bit(GPIO_NR_H1900_AC_IN_N)))
 158                 info->ac_line_status = APM_AC_ONLINE;
 159         else
 160                 info->ac_line_status = APM_AC_OFFLINE;
 161
 162         if (GPLR(GPIO_NR_H1900_CHARGING) & GPIO_bit(GPIO_NR_H1900_CHARGING))
 163                 info->battery_status = APM_BATTERY_STATUS_CHARGING;
 164         else if (!(GPLR(GPIO_NR_H1900_MBAT_IN) & GPIO_bit(GPIO_NR_H1900_MBAT_IN)))
 165                 info->battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
 166         else {
 167                 if (battery_power > 50)
 168                         info->battery_status = APM_BATTERY_STATUS_HIGH;
 169                 else if (battery_power < 5)
 170                         info->battery_status = APM_BATTERY_STATUS_CRITICAL;
 171                 else
 172                         info->battery_status = APM_BATTERY_STATUS_LOW;
 173         }
 174
 175         info->time = 0;
 176         info->units = 0;
 177 }
 178
 179 int set_apm_get_power_status(apm_get_power_status_t t)
 180 {
 181         apm_get_power_status = t;
 182
 183         return 0;
 184 }
 185 #endif
 186
 187 static int h1900_power_probe(struct device *dev)
 188 {
 189         h1900_charge(0, NULL, NULL);
 190
 191         set_irq_type(IRQ_GPIO(GPIO_NR_H1900_AC_IN_N), IRQT_BOTHEDGE);
 192         set_irq_type(IRQ_GPIO(GPIO_NR_H1900_MBAT_IN), IRQT_BOTHEDGE);
 193         set_irq_type(IRQ_GPIO(GPIO_NR_H1900_CHARGING), IRQT_BOTHEDGE);
 194         setup_irq(IRQ_GPIO(GPIO_NR_H1900_AC_IN_N), &h1900_charge_irq);
 195         setup_irq(IRQ_GPIO(GPIO_NR_H1900_MBAT_IN), &h1900_charge_irq);
 196         setup_irq(IRQ_GPIO(GPIO_NR_H1900_CHARGING), &h1900_charge_irq);
 197
 198 #ifdef CONFIG_PM
 199         set_apm_get_power_status(h1900_apm_get_power_status);
 200 #endif
 201
 202         return 0;
 203 }
 204
 205 #ifdef CONFIG_PM
 206 static int h1900_power_suspend(struct device *dev, pm_message_t state)
 207 {
 208         asic3_set_led(asic3, 1, 0, 0x100);
 209         asic3_set_led(asic3, 0, 0, 0x100);
 210
 211         disable_irq(IRQ_GPIO(GPIO_NR_H1900_AC_IN_N));
 212         disable_irq(IRQ_GPIO(GPIO_NR_H1900_MBAT_IN));
 213         disable_irq(IRQ_GPIO(GPIO_NR_H1900_CHARGING));
 214
 215         return 0;
 216 }
 217
 218 static int h1900_power_resume(struct device *dev)
 219 {
 220         enable_irq(IRQ_GPIO(GPIO_NR_H1900_AC_IN_N));
 221         enable_irq(IRQ_GPIO(GPIO_NR_H1900_MBAT_IN));
 222         enable_irq(IRQ_GPIO(GPIO_NR_H1900_CHARGING));
 223
 224         return 0;
 225 }
 226 #endif
 227
 228 static struct device_driver h1900_power_driver = {
 229         .name           = "h1900-power",
 230         .bus            = &platform_bus_type,
 231         .probe          = h1900_power_probe,
 232 #ifdef CONFIG_PM
 233         .suspend        = h1900_power_suspend,
 234         .resume         = h1900_power_resume,
 235 #endif
 236 };
 237
 238 static int __init h1900_power_init(void)
 239 {
 240         if (!machine_is_h1900())
 241                 return -ENODEV;
 242
 243         return driver_register(&h1900_power_driver);
 244 }
 245
 246 static void __exit h1900_power_exit(void)
 247 {
 248         driver_unregister(&h1900_power_driver);
 249 }
 250
 251 module_init(h1900_power_init);
 252 module_exit(h1900_power_exit);
 253
 254 MODULE_AUTHOR("Joshua Wise, Pawel Kolodziejski");
 255 MODULE_DESCRIPTION("HP iPAQ h1910/h1915 Power Driver");
 256 MODULE_LICENSE("GPL");