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 <asm/apm.h> 20 #include <asm/irq.h> 21 #include <asm/mach-types.h> 22 #include <asm/hardware.h> 23 #include <asm/hardware/scoop.h> 24 25 #include <asm/arch/sharpsl.h> 26 #include <asm/arch/spitz.h> 27 #include <asm/arch/pxa-regs.h> 28 #include "sharpsl.h" 29 30 static int spitz_last_ac_status; 31 32 static void spitz_charger_init(void) 33 { 34 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN); 35 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN); 36 sharpsl_pm_pxa_init(); 37 } 38 39 static void spitz_measure_temp(int on) 40 { 41 if (on) 42 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 43 else 44 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 45 } 46 47 static void spitz_charge(int on) 48 { 49 if (on) { 50 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 51 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 52 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 53 } else { 54 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 55 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 56 } 57 } else { 58 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 59 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 60 } 61 } 62 63 static void spitz_discharge(int on) 64 { 65 if (on) 66 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 67 else 68 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 69 } 70 71 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 72 on the power bus which the green led on spitz provides */ 73 static void spitz_discharge1(int on) 74 { 75 if (on) 76 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 77 else 78 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 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 /* Clear reset status */ 114 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; 115 116 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 117 PCFR = PCFR_GPR_EN | PCFR_OPDE; 118 } 119 120 static void spitz_postsuspend(void) 121 { 122 pxa_gpio_mode(GPIO18_RDY_MD); 123 pxa_gpio_mode(10 | GPIO_IN); 124 } 125 126 static int spitz_should_wakeup(unsigned int resume_on_alarm) 127 { 128 int is_resume = 0; 129 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 130 131 if (spitz_last_ac_status != acin) { 132 if (acin) { 133 /* charge on */ 134 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 135 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 136 } else { 137 /* charge off */ 138 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 139 sharpsl_pm_led(SHARPSL_LED_OFF); 140 sharpsl_pm.machinfo->charge(0); 141 sharpsl_pm.charge_mode = CHRG_OFF; 142 } 143 spitz_last_ac_status = acin; 144 /* Return to suspend as this must be what we were woken for */ 145 return 0; 146 } 147 148 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 149 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 150 151 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 152 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 153 154 if (resume_on_alarm && (PEDR & PWER_RTC)) 155 is_resume |= PWER_RTC; 156 157 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 158 return is_resume; 159 } 160 161 static unsigned long spitz_charger_wakeup(void) 162 { 163 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 164 } 165 166 unsigned long spitzpm_read_devdata(int type) 167 { 168 switch(type) { 169 case SHARPSL_STATUS_ACIN: 170 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 171 case SHARPSL_STATUS_LOCK: 172 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 173 case SHARPSL_STATUS_CHRGFULL: 174 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 175 case SHARPSL_STATUS_FATAL: 176 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 177 case SHARPSL_ACIN_VOLT: 178 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 179 case SHARPSL_BATT_TEMP: 180 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 181 case SHARPSL_BATT_VOLT: 182 default: 183 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 184 } 185 } 186 187 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 188 .init = spitz_charger_init, 189 .exit = sharpsl_pm_pxa_remove, 190 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 191 .gpio_acin = SPITZ_GPIO_AC_IN, 192 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 193 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 194 .discharge = spitz_discharge, 195 .discharge1 = spitz_discharge1, 196 .charge = spitz_charge, 197 .measure_temp = spitz_measure_temp, 198 .presuspend = spitz_presuspend, 199 .postsuspend = spitz_postsuspend, 200 .read_devdata = spitzpm_read_devdata, 201 .charger_wakeup = spitz_charger_wakeup, 202 .should_wakeup = spitz_should_wakeup, 203 .bat_levels = 40, 204 .bat_levels_noac = spitz_battery_levels_noac, 205 .bat_levels_acin = spitz_battery_levels_acin, 206 .status_high_acin = 188, 207 .status_low_acin = 178, 208 .status_high_noac = 185, 209 .status_low_noac = 175, 210 }; 211 212 static struct platform_device *spitzpm_device; 213 214 static int __devinit spitzpm_init(void) 215 { 216 int ret; 217 218 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 219 if (!spitzpm_device) 220 return -ENOMEM; 221 222 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 223 ret = platform_device_add(spitzpm_device); 224 225 if (ret) 226 platform_device_put(spitzpm_device); 227 228 return ret; 229 } 230 231 static void spitzpm_exit(void) 232 { 233 platform_device_unregister(spitzpm_device); 234 } 235 236 module_init(spitzpm_init); 237 module_exit(spitzpm_exit); 238