1 /* 2 * Battery and Power Management code for the Sharp SL-Cxx00 3 * 4 * Copyright (c) 2005 Richard Purdie 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 */ 11 12 #include <linux/module.h> 13 #include <linux/stat.h> 14 #include <linux/init.h> 15 #include <linux/kernel.h> 16 #include <linux/delay.h> 17 #include <linux/interrupt.h> 18 #include <linux/platform_device.h> 19 #include <linux/apm-emulation.h> 20 21 #include <asm/irq.h> 22 #include <asm/mach-types.h> 23 #include <mach/hardware.h> 24 25 #include <mach/sharpsl.h> 26 #include <mach/spitz.h> 27 #include <mach/pxa2xx-regs.h> 28 #include <mach/pxa2xx-gpio.h> 29 #include "sharpsl.h" 30 31 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 32 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 33 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 34 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 35 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 36 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 37 38 static int spitz_last_ac_status; 39 40 static void spitz_charger_init(void) 41 { 42 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN); 43 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN); 44 sharpsl_pm_pxa_init(); 45 } 46 47 static void spitz_measure_temp(int on) 48 { 49 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 50 } 51 52 static void spitz_charge(int on) 53 { 54 if (on) { 55 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 56 gpio_set_value(SPITZ_GPIO_JK_B, 1); 57 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 58 } else { 59 gpio_set_value(SPITZ_GPIO_JK_B, 0); 60 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 61 } 62 } else { 63 gpio_set_value(SPITZ_GPIO_JK_B, 0); 64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 65 } 66 } 67 68 static void spitz_discharge(int on) 69 { 70 gpio_set_value(SPITZ_GPIO_JK_A, on); 71 } 72 73 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 74 on the power bus which the green led on spitz provides */ 75 static void spitz_discharge1(int on) 76 { 77 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 78 } 79 80 static void spitz_presuspend(void) 81 { 82 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 83 84 /* GPIO Sleep Register */ 85 PGSR0 = 0x00144018; 86 PGSR1 = 0x00EF0000; 87 if (machine_is_akita()) { 88 PGSR2 = 0x2121C000; 89 PGSR3 = 0x00600400; 90 } else { 91 PGSR2 = 0x0121C000; 92 PGSR3 = 0x00600000; 93 } 94 95 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 96 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 97 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 98 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 99 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 100 101 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH); 102 103 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 104 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 105 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 106 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 107 PKSR = 0xffffffff; // clear 108 109 /* nRESET_OUT Disable */ 110 PSLR |= PSLR_SL_ROD; 111 112 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 113 PCFR = PCFR_GPR_EN | PCFR_OPDE; 114 } 115 116 static void spitz_postsuspend(void) 117 { 118 pxa_gpio_mode(GPIO18_RDY_MD); 119 pxa_gpio_mode(10 | GPIO_IN); 120 } 121 122 static int spitz_should_wakeup(unsigned int resume_on_alarm) 123 { 124 int is_resume = 0; 125 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 126 127 if (spitz_last_ac_status != acin) { 128 if (acin) { 129 /* charge on */ 130 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 131 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 132 } else { 133 /* charge off */ 134 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 135 sharpsl_pm_led(SHARPSL_LED_OFF); 136 sharpsl_pm.machinfo->charge(0); 137 sharpsl_pm.charge_mode = CHRG_OFF; 138 } 139 spitz_last_ac_status = acin; 140 /* Return to suspend as this must be what we were woken for */ 141 return 0; 142 } 143 144 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 145 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 146 147 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 148 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 149 150 if (resume_on_alarm && (PEDR & PWER_RTC)) 151 is_resume |= PWER_RTC; 152 153 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 154 return is_resume; 155 } 156 157 static unsigned long spitz_charger_wakeup(void) 158 { 159 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 160 } 161 162 unsigned long spitzpm_read_devdata(int type) 163 { 164 switch(type) { 165 case SHARPSL_STATUS_ACIN: 166 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 167 case SHARPSL_STATUS_LOCK: 168 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 169 case SHARPSL_STATUS_CHRGFULL: 170 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 171 case SHARPSL_STATUS_FATAL: 172 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 173 case SHARPSL_ACIN_VOLT: 174 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 175 case SHARPSL_BATT_TEMP: 176 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 177 case SHARPSL_BATT_VOLT: 178 default: 179 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 180 } 181 } 182 183 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 184 .init = spitz_charger_init, 185 .exit = sharpsl_pm_pxa_remove, 186 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 187 .gpio_acin = SPITZ_GPIO_AC_IN, 188 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 189 .batfull_irq = 1, 190 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 191 .discharge = spitz_discharge, 192 .discharge1 = spitz_discharge1, 193 .charge = spitz_charge, 194 .measure_temp = spitz_measure_temp, 195 .presuspend = spitz_presuspend, 196 .postsuspend = spitz_postsuspend, 197 .read_devdata = spitzpm_read_devdata, 198 .charger_wakeup = spitz_charger_wakeup, 199 .should_wakeup = spitz_should_wakeup, 200 #if defined(CONFIG_LCD_CORGI) 201 .backlight_limit = corgi_lcd_limit_intensity, 202 #elif defined(CONFIG_BACKLIGHT_CORGI) 203 .backlight_limit = corgibl_limit_intensity, 204 #endif 205 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 206 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 207 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 208 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 209 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 210 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 211 .bat_levels = 40, 212 .bat_levels_noac = spitz_battery_levels_noac, 213 .bat_levels_acin = spitz_battery_levels_acin, 214 .status_high_acin = 188, 215 .status_low_acin = 178, 216 .status_high_noac = 185, 217 .status_low_noac = 175, 218 }; 219 220 static struct platform_device *spitzpm_device; 221 222 static int __devinit spitzpm_init(void) 223 { 224 int ret; 225 226 if (!machine_is_spitz() && !machine_is_akita() 227 && !machine_is_borzoi()) 228 return -ENODEV; 229 230 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 231 if (!spitzpm_device) 232 return -ENOMEM; 233 234 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 235 ret = platform_device_add(spitzpm_device); 236 237 if (ret) 238 platform_device_put(spitzpm_device); 239 240 return ret; 241 } 242 243 static void spitzpm_exit(void) 244 { 245 platform_device_unregister(spitzpm_device); 246 } 247 248 module_init(spitzpm_init); 249 module_exit(spitzpm_exit); 250