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/pxa-regs.h> 28 #include <mach/pxa2xx-regs.h> 29 #include <mach/pxa2xx-gpio.h> 30 #include "sharpsl.h" 31 32 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 33 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 34 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 35 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 36 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 37 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 38 39 static int spitz_last_ac_status; 40 41 static void spitz_charger_init(void) 42 { 43 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN); 44 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN); 45 sharpsl_pm_pxa_init(); 46 } 47 48 static void spitz_measure_temp(int on) 49 { 50 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 51 } 52 53 static void spitz_charge(int on) 54 { 55 if (on) { 56 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 57 gpio_set_value(SPITZ_GPIO_JK_B, 1); 58 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 59 } else { 60 gpio_set_value(SPITZ_GPIO_JK_B, 0); 61 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 62 } 63 } else { 64 gpio_set_value(SPITZ_GPIO_JK_B, 0); 65 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 66 } 67 } 68 69 static void spitz_discharge(int on) 70 { 71 gpio_set_value(SPITZ_GPIO_JK_A, on); 72 } 73 74 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 75 on the power bus which the green led on spitz provides */ 76 static void spitz_discharge1(int on) 77 { 78 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 79 } 80 81 static void spitz_presuspend(void) 82 { 83 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 84 85 /* GPIO Sleep Register */ 86 PGSR0 = 0x00144018; 87 PGSR1 = 0x00EF0000; 88 if (machine_is_akita()) { 89 PGSR2 = 0x2121C000; 90 PGSR3 = 0x00600400; 91 } else { 92 PGSR2 = 0x0121C000; 93 PGSR3 = 0x00600000; 94 } 95 96 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 97 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 98 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 99 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 100 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 101 102 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH); 103 104 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 105 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 106 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 107 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 108 PKSR = 0xffffffff; // clear 109 110 /* nRESET_OUT Disable */ 111 PSLR |= PSLR_SL_ROD; 112 113 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 114 PCFR = PCFR_GPR_EN | PCFR_OPDE; 115 } 116 117 static void spitz_postsuspend(void) 118 { 119 pxa_gpio_mode(GPIO18_RDY_MD); 120 pxa_gpio_mode(10 | GPIO_IN); 121 } 122 123 static int spitz_should_wakeup(unsigned int resume_on_alarm) 124 { 125 int is_resume = 0; 126 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 127 128 if (spitz_last_ac_status != acin) { 129 if (acin) { 130 /* charge on */ 131 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 132 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 133 } else { 134 /* charge off */ 135 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 136 sharpsl_pm_led(SHARPSL_LED_OFF); 137 sharpsl_pm.machinfo->charge(0); 138 sharpsl_pm.charge_mode = CHRG_OFF; 139 } 140 spitz_last_ac_status = acin; 141 /* Return to suspend as this must be what we were woken for */ 142 return 0; 143 } 144 145 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 146 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 147 148 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 149 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 150 151 if (resume_on_alarm && (PEDR & PWER_RTC)) 152 is_resume |= PWER_RTC; 153 154 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 155 return is_resume; 156 } 157 158 static unsigned long spitz_charger_wakeup(void) 159 { 160 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 161 } 162 163 unsigned long spitzpm_read_devdata(int type) 164 { 165 switch(type) { 166 case SHARPSL_STATUS_ACIN: 167 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 168 case SHARPSL_STATUS_LOCK: 169 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 170 case SHARPSL_STATUS_CHRGFULL: 171 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 172 case SHARPSL_STATUS_FATAL: 173 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 174 case SHARPSL_ACIN_VOLT: 175 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 176 case SHARPSL_BATT_TEMP: 177 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 178 case SHARPSL_BATT_VOLT: 179 default: 180 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 181 } 182 } 183 184 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 185 .init = spitz_charger_init, 186 .exit = sharpsl_pm_pxa_remove, 187 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 188 .gpio_acin = SPITZ_GPIO_AC_IN, 189 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 190 .batfull_irq = 1, 191 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 192 .discharge = spitz_discharge, 193 .discharge1 = spitz_discharge1, 194 .charge = spitz_charge, 195 .measure_temp = spitz_measure_temp, 196 .presuspend = spitz_presuspend, 197 .postsuspend = spitz_postsuspend, 198 .read_devdata = spitzpm_read_devdata, 199 .charger_wakeup = spitz_charger_wakeup, 200 .should_wakeup = spitz_should_wakeup, 201 #if defined(CONFIG_LCD_CORGI) 202 .backlight_limit = corgi_lcd_limit_intensity, 203 #elif defined(CONFIG_BACKLIGHT_CORGI) 204 .backlight_limit = corgibl_limit_intensity, 205 #endif 206 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 207 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 208 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 209 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 210 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 211 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 212 .bat_levels = 40, 213 .bat_levels_noac = spitz_battery_levels_noac, 214 .bat_levels_acin = spitz_battery_levels_acin, 215 .status_high_acin = 188, 216 .status_low_acin = 178, 217 .status_high_noac = 185, 218 .status_low_noac = 175, 219 }; 220 221 static struct platform_device *spitzpm_device; 222 223 static int __devinit spitzpm_init(void) 224 { 225 int ret; 226 227 if (!machine_is_spitz() && !machine_is_akita() 228 && !machine_is_borzoi()) 229 return -ENODEV; 230 231 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 232 if (!spitzpm_device) 233 return -ENOMEM; 234 235 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 236 ret = platform_device_add(spitzpm_device); 237 238 if (ret) 239 platform_device_put(spitzpm_device); 240 241 return ret; 242 } 243 244 static void spitzpm_exit(void) 245 { 246 platform_device_unregister(spitzpm_device); 247 } 248 249 module_init(spitzpm_init); 250 module_exit(spitzpm_exit); 251