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