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 #include <asm/hardware/scoop.h> 25 26 #include <mach/sharpsl.h> 27 #include <mach/spitz.h> 28 #include <mach/pxa-regs.h> 29 #include <mach/pxa2xx-regs.h> 30 #include <mach/pxa2xx-gpio.h> 31 #include "sharpsl.h" 32 33 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 34 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 35 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 36 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 37 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 38 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 39 40 static int spitz_last_ac_status; 41 42 static void spitz_charger_init(void) 43 { 44 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN); 45 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN); 46 sharpsl_pm_pxa_init(); 47 } 48 49 static void spitz_measure_temp(int on) 50 { 51 if (on) 52 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 53 else 54 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 55 } 56 57 static void spitz_charge(int on) 58 { 59 if (on) { 60 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 61 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 62 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 63 } else { 64 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 65 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 66 } 67 } else { 68 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 69 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 70 } 71 } 72 73 static void spitz_discharge(int on) 74 { 75 if (on) 76 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 77 else 78 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 79 } 80 81 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 82 on the power bus which the green led on spitz provides */ 83 static void spitz_discharge1(int on) 84 { 85 if (on) 86 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 87 else 88 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 89 } 90 91 static void spitz_presuspend(void) 92 { 93 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 94 95 /* GPIO Sleep Register */ 96 PGSR0 = 0x00144018; 97 PGSR1 = 0x00EF0000; 98 if (machine_is_akita()) { 99 PGSR2 = 0x2121C000; 100 PGSR3 = 0x00600400; 101 } else { 102 PGSR2 = 0x0121C000; 103 PGSR3 = 0x00600000; 104 } 105 106 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 107 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 108 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 109 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 110 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 111 112 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH); 113 114 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 115 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 116 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 117 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 118 PKSR = 0xffffffff; // clear 119 120 /* nRESET_OUT Disable */ 121 PSLR |= PSLR_SL_ROD; 122 123 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 124 PCFR = PCFR_GPR_EN | PCFR_OPDE; 125 } 126 127 static void spitz_postsuspend(void) 128 { 129 pxa_gpio_mode(GPIO18_RDY_MD); 130 pxa_gpio_mode(10 | GPIO_IN); 131 } 132 133 static int spitz_should_wakeup(unsigned int resume_on_alarm) 134 { 135 int is_resume = 0; 136 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 137 138 if (spitz_last_ac_status != acin) { 139 if (acin) { 140 /* charge on */ 141 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 142 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 143 } else { 144 /* charge off */ 145 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 146 sharpsl_pm_led(SHARPSL_LED_OFF); 147 sharpsl_pm.machinfo->charge(0); 148 sharpsl_pm.charge_mode = CHRG_OFF; 149 } 150 spitz_last_ac_status = acin; 151 /* Return to suspend as this must be what we were woken for */ 152 return 0; 153 } 154 155 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 156 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 157 158 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 159 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 160 161 if (resume_on_alarm && (PEDR & PWER_RTC)) 162 is_resume |= PWER_RTC; 163 164 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 165 return is_resume; 166 } 167 168 static unsigned long spitz_charger_wakeup(void) 169 { 170 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 171 } 172 173 unsigned long spitzpm_read_devdata(int type) 174 { 175 switch(type) { 176 case SHARPSL_STATUS_ACIN: 177 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 178 case SHARPSL_STATUS_LOCK: 179 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 180 case SHARPSL_STATUS_CHRGFULL: 181 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 182 case SHARPSL_STATUS_FATAL: 183 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 184 case SHARPSL_ACIN_VOLT: 185 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 186 case SHARPSL_BATT_TEMP: 187 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 188 case SHARPSL_BATT_VOLT: 189 default: 190 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 191 } 192 } 193 194 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 195 .init = spitz_charger_init, 196 .exit = sharpsl_pm_pxa_remove, 197 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 198 .gpio_acin = SPITZ_GPIO_AC_IN, 199 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 200 .batfull_irq = 1, 201 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 202 .discharge = spitz_discharge, 203 .discharge1 = spitz_discharge1, 204 .charge = spitz_charge, 205 .measure_temp = spitz_measure_temp, 206 .presuspend = spitz_presuspend, 207 .postsuspend = spitz_postsuspend, 208 .read_devdata = spitzpm_read_devdata, 209 .charger_wakeup = spitz_charger_wakeup, 210 .should_wakeup = spitz_should_wakeup, 211 #ifdef CONFIG_BACKLIGHT_CORGI 212 .backlight_limit = corgibl_limit_intensity, 213 #endif 214 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 215 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 216 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 217 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 218 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 219 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 220 .bat_levels = 40, 221 .bat_levels_noac = spitz_battery_levels_noac, 222 .bat_levels_acin = spitz_battery_levels_acin, 223 .status_high_acin = 188, 224 .status_low_acin = 178, 225 .status_high_noac = 185, 226 .status_low_noac = 175, 227 }; 228 229 static struct platform_device *spitzpm_device; 230 231 static int __devinit spitzpm_init(void) 232 { 233 int ret; 234 235 if (!machine_is_spitz() && !machine_is_akita() 236 && !machine_is_borzoi()) 237 return -ENODEV; 238 239 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 240 if (!spitzpm_device) 241 return -ENOMEM; 242 243 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 244 ret = platform_device_add(spitzpm_device); 245 246 if (ret) 247 platform_device_put(spitzpm_device); 248 249 return ret; 250 } 251 252 static void spitzpm_exit(void) 253 { 254 platform_device_unregister(spitzpm_device); 255 } 256 257 module_init(spitzpm_init); 258 module_exit(spitzpm_exit); 259