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 <asm/hardware.h> 24 #include <asm/hardware/scoop.h> 25 26 #include <asm/arch/sharpsl.h> 27 #include <asm/arch/spitz.h> 28 #include <asm/arch/pxa-regs.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 if (on) 50 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 51 else 52 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 53 } 54 55 static void spitz_charge(int on) 56 { 57 if (on) { 58 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 59 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 60 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 61 } else { 62 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 63 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 64 } 65 } else { 66 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 67 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 68 } 69 } 70 71 static void spitz_discharge(int on) 72 { 73 if (on) 74 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 75 else 76 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 77 } 78 79 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 80 on the power bus which the green led on spitz provides */ 81 static void spitz_discharge1(int on) 82 { 83 if (on) 84 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 85 else 86 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 87 } 88 89 static void spitz_presuspend(void) 90 { 91 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 92 93 /* GPIO Sleep Register */ 94 PGSR0 = 0x00144018; 95 PGSR1 = 0x00EF0000; 96 if (machine_is_akita()) { 97 PGSR2 = 0x2121C000; 98 PGSR3 = 0x00600400; 99 } else { 100 PGSR2 = 0x0121C000; 101 PGSR3 = 0x00600000; 102 } 103 104 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 105 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 106 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 107 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 108 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 109 110 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH); 111 112 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 113 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 114 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 115 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 116 PKSR = 0xffffffff; // clear 117 118 /* nRESET_OUT Disable */ 119 PSLR |= PSLR_SL_ROD; 120 121 /* Clear reset status */ 122 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; 123 124 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 125 PCFR = PCFR_GPR_EN | PCFR_OPDE; 126 } 127 128 static void spitz_postsuspend(void) 129 { 130 pxa_gpio_mode(GPIO18_RDY_MD); 131 pxa_gpio_mode(10 | GPIO_IN); 132 } 133 134 static int spitz_should_wakeup(unsigned int resume_on_alarm) 135 { 136 int is_resume = 0; 137 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 138 139 if (spitz_last_ac_status != acin) { 140 if (acin) { 141 /* charge on */ 142 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 143 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 144 } else { 145 /* charge off */ 146 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 147 sharpsl_pm_led(SHARPSL_LED_OFF); 148 sharpsl_pm.machinfo->charge(0); 149 sharpsl_pm.charge_mode = CHRG_OFF; 150 } 151 spitz_last_ac_status = acin; 152 /* Return to suspend as this must be what we were woken for */ 153 return 0; 154 } 155 156 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 157 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 158 159 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 160 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 161 162 if (resume_on_alarm && (PEDR & PWER_RTC)) 163 is_resume |= PWER_RTC; 164 165 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 166 return is_resume; 167 } 168 169 static unsigned long spitz_charger_wakeup(void) 170 { 171 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 172 } 173 174 unsigned long spitzpm_read_devdata(int type) 175 { 176 switch(type) { 177 case SHARPSL_STATUS_ACIN: 178 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 179 case SHARPSL_STATUS_LOCK: 180 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 181 case SHARPSL_STATUS_CHRGFULL: 182 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 183 case SHARPSL_STATUS_FATAL: 184 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 185 case SHARPSL_ACIN_VOLT: 186 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 187 case SHARPSL_BATT_TEMP: 188 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 189 case SHARPSL_BATT_VOLT: 190 default: 191 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 192 } 193 } 194 195 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 196 .init = spitz_charger_init, 197 .exit = sharpsl_pm_pxa_remove, 198 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 199 .gpio_acin = SPITZ_GPIO_AC_IN, 200 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 201 .batfull_irq = 1, 202 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 203 .discharge = spitz_discharge, 204 .discharge1 = spitz_discharge1, 205 .charge = spitz_charge, 206 .measure_temp = spitz_measure_temp, 207 .presuspend = spitz_presuspend, 208 .postsuspend = spitz_postsuspend, 209 .read_devdata = spitzpm_read_devdata, 210 .charger_wakeup = spitz_charger_wakeup, 211 .should_wakeup = spitz_should_wakeup, 212 .backlight_limit = corgibl_limit_intensity, 213 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 214 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 215 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 216 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 217 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 218 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 219 .bat_levels = 40, 220 .bat_levels_noac = spitz_battery_levels_noac, 221 .bat_levels_acin = spitz_battery_levels_acin, 222 .status_high_acin = 188, 223 .status_low_acin = 178, 224 .status_high_noac = 185, 225 .status_low_noac = 175, 226 }; 227 228 static struct platform_device *spitzpm_device; 229 230 static int __devinit spitzpm_init(void) 231 { 232 int ret; 233 234 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 235 if (!spitzpm_device) 236 return -ENOMEM; 237 238 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 239 ret = platform_device_add(spitzpm_device); 240 241 if (ret) 242 platform_device_put(spitzpm_device); 243 244 return ret; 245 } 246 247 static void spitzpm_exit(void) 248 { 249 platform_device_unregister(spitzpm_device); 250 } 251 252 module_init(spitzpm_init); 253 module_exit(spitzpm_exit); 254