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 } 37 38 static void spitz_charge_led(int val) 39 { 40 if (val == SHARPSL_LED_ERROR) { 41 dev_dbg(sharpsl_pm.dev, "Charge LED Error\n"); 42 } else if (val == SHARPSL_LED_ON) { 43 dev_dbg(sharpsl_pm.dev, "Charge LED On\n"); 44 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_ORANGE); 45 } else { 46 dev_dbg(sharpsl_pm.dev, "Charge LED Off\n"); 47 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_ORANGE); 48 } 49 } 50 51 static void spitz_measure_temp(int on) 52 { 53 if (on) 54 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 55 else 56 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON); 57 } 58 59 static void spitz_charge(int on) 60 { 61 if (on) { 62 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 63 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 64 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 65 } else { 66 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 67 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 68 } 69 } else { 70 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B); 71 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON); 72 } 73 } 74 75 static void spitz_discharge(int on) 76 { 77 if (on) 78 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 79 else 80 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A); 81 } 82 83 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 84 on the power bus which the green led on spitz provides */ 85 static void spitz_discharge1(int on) 86 { 87 if (on) 88 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 89 else 90 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN); 91 } 92 93 static void spitz_presuspend(void) 94 { 95 spitz_last_ac_status = STATUS_AC_IN(); 96 97 /* GPIO Sleep Register */ 98 PGSR0 = 0x00144018; 99 PGSR1 = 0x00EF0000; 100 if (machine_is_akita()) { 101 PGSR2 = 0x2121C000; 102 PGSR3 = 0x00600400; 103 } else { 104 PGSR2 = 0x0121C000; 105 PGSR3 = 0x00600000; 106 } 107 108 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 109 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 110 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 111 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 112 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 113 114 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH); 115 116 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 117 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 118 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 119 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 120 PKSR = 0xffffffff; // clear 121 122 /* nRESET_OUT Disable */ 123 PSLR |= PSLR_SL_ROD; 124 125 /* Clear reset status */ 126 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; 127 128 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 129 PCFR = PCFR_GPR_EN | PCFR_OPDE; 130 } 131 132 static void spitz_postsuspend(void) 133 { 134 pxa_gpio_mode(GPIO18_RDY_MD); 135 pxa_gpio_mode(10 | GPIO_IN); 136 } 137 138 static int spitz_should_wakeup(unsigned int resume_on_alarm) 139 { 140 int is_resume = 0; 141 int acin = STATUS_AC_IN(); 142 143 if (spitz_last_ac_status != acin) { 144 if (acin) { 145 /* charge on */ 146 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 147 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 148 } else { 149 /* charge off */ 150 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 151 CHARGE_LED_OFF(); 152 CHARGE_OFF(); 153 sharpsl_pm.charge_mode = CHRG_OFF; 154 } 155 spitz_last_ac_status = acin; 156 /* Return to suspend as this must be what we were woken for */ 157 return 0; 158 } 159 160 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 161 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 162 163 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 164 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 165 166 if (resume_on_alarm && (PEDR & PWER_RTC)) 167 is_resume |= PWER_RTC; 168 169 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume); 170 return is_resume; 171 } 172 173 static unsigned long spitz_charger_wakeup(void) 174 { 175 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 176 } 177 178 static int spitz_acin_status(void) 179 { 180 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 181 } 182 183 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 184 .init = spitz_charger_init, 185 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 186 .gpio_acin = SPITZ_GPIO_AC_IN, 187 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 188 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 189 .status_acin = spitz_acin_status, 190 .discharge = spitz_discharge, 191 .discharge1 = spitz_discharge1, 192 .charge = spitz_charge, 193 .chargeled = spitz_charge_led, 194 .measure_temp = spitz_measure_temp, 195 .presuspend = spitz_presuspend, 196 .postsuspend = spitz_postsuspend, 197 .charger_wakeup = spitz_charger_wakeup, 198 .should_wakeup = spitz_should_wakeup, 199 .bat_levels = 40, 200 .bat_levels_noac = spitz_battery_levels_noac, 201 .bat_levels_acin = spitz_battery_levels_acin, 202 .status_high_acin = 188, 203 .status_low_acin = 178, 204 .status_high_noac = 185, 205 .status_low_noac = 175, 206 }; 207 208 static struct platform_device *spitzpm_device; 209 210 static int __devinit spitzpm_init(void) 211 { 212 int ret; 213 214 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 215 if (!spitzpm_device) 216 return -ENOMEM; 217 218 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 219 ret = platform_device_add(spitzpm_device); 220 221 if (ret) 222 platform_device_put(spitzpm_device); 223 224 return ret; 225 } 226 227 static void spitzpm_exit(void) 228 { 229 platform_device_unregister(spitzpm_device); 230 } 231 232 module_init(spitzpm_init); 233 module_exit(spitzpm_exit); 234