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/pxa27x.h> 28 29 #include "sharpsl.h" 30 #include "generic.h" 31 32 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 33 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 34 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 35 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 36 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 37 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 38 39 static int spitz_last_ac_status; 40 41 static struct gpio spitz_charger_gpios[] = { 42 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, 43 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, 44 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, 45 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, 46 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, 47 }; 48 49 static void spitz_charger_init(void) 50 { 51 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); 52 } 53 54 static void spitz_measure_temp(int on) 55 { 56 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 57 } 58 59 static void spitz_charge(int on) 60 { 61 if (on) { 62 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 63 gpio_set_value(SPITZ_GPIO_JK_B, 1); 64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 65 } else { 66 gpio_set_value(SPITZ_GPIO_JK_B, 0); 67 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 68 } 69 } else { 70 gpio_set_value(SPITZ_GPIO_JK_B, 0); 71 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 72 } 73 } 74 75 static void spitz_discharge(int on) 76 { 77 gpio_set_value(SPITZ_GPIO_JK_A, on); 78 } 79 80 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 81 on the power bus which the green led on spitz provides */ 82 static void spitz_discharge1(int on) 83 { 84 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 85 } 86 87 static unsigned long gpio18_config[] = { 88 GPIO18_RDY, 89 GPIO18_GPIO, 90 }; 91 92 static void spitz_presuspend(void) 93 { 94 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 95 96 /* GPIO Sleep Register */ 97 PGSR0 = 0x00144018; 98 PGSR1 = 0x00EF0000; 99 if (machine_is_akita()) { 100 PGSR2 = 0x2121C000; 101 PGSR3 = 0x00600400; 102 } else { 103 PGSR2 = 0x0121C000; 104 PGSR3 = 0x00600000; 105 } 106 107 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 108 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 109 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 110 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 111 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 112 113 pxa2xx_mfp_config(&gpio18_config[0], 1); 114 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 115 gpio_free(18); 116 117 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 118 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 119 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 120 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 121 PKSR = 0xffffffff; /* clear */ 122 123 /* nRESET_OUT Disable */ 124 PSLR |= PSLR_SL_ROD; 125 126 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 127 PCFR = PCFR_GPR_EN | PCFR_OPDE; 128 } 129 130 static void spitz_postsuspend(void) 131 { 132 pxa2xx_mfp_config(&gpio18_config[1], 1); 133 } 134 135 static int spitz_should_wakeup(unsigned int resume_on_alarm) 136 { 137 int is_resume = 0; 138 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 139 140 if (spitz_last_ac_status != acin) { 141 if (acin) { 142 /* charge on */ 143 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 144 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 145 } else { 146 /* charge off */ 147 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 148 sharpsl_pm_led(SHARPSL_LED_OFF); 149 sharpsl_pm.machinfo->charge(0); 150 sharpsl_pm.charge_mode = CHRG_OFF; 151 } 152 spitz_last_ac_status = acin; 153 /* Return to suspend as this must be what we were woken for */ 154 return 0; 155 } 156 157 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 158 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 159 160 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 161 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 162 163 if (resume_on_alarm && (PEDR & PWER_RTC)) 164 is_resume |= PWER_RTC; 165 166 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 167 return is_resume; 168 } 169 170 static unsigned long spitz_charger_wakeup(void) 171 { 172 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC)); 173 } 174 175 unsigned long spitzpm_read_devdata(int type) 176 { 177 switch (type) { 178 case SHARPSL_STATUS_ACIN: 179 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0); 180 case SHARPSL_STATUS_LOCK: 181 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock); 182 case SHARPSL_STATUS_CHRGFULL: 183 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull); 184 case SHARPSL_STATUS_FATAL: 185 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal); 186 case SHARPSL_ACIN_VOLT: 187 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 188 case SHARPSL_BATT_TEMP: 189 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 190 case SHARPSL_BATT_VOLT: 191 default: 192 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 193 } 194 } 195 196 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 197 .init = spitz_charger_init, 198 .exit = NULL, 199 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 200 .gpio_acin = SPITZ_GPIO_AC_IN, 201 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 202 .batfull_irq = 1, 203 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 204 .discharge = spitz_discharge, 205 .discharge1 = spitz_discharge1, 206 .charge = spitz_charge, 207 .measure_temp = spitz_measure_temp, 208 .presuspend = spitz_presuspend, 209 .postsuspend = spitz_postsuspend, 210 .read_devdata = spitzpm_read_devdata, 211 .charger_wakeup = spitz_charger_wakeup, 212 .should_wakeup = spitz_should_wakeup, 213 #if defined(CONFIG_LCD_CORGI) 214 .backlight_limit = corgi_lcd_limit_intensity, 215 #endif 216 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 217 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 218 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 219 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 220 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 221 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 222 .bat_levels = 40, 223 .bat_levels_noac = sharpsl_battery_levels_noac, 224 .bat_levels_acin = sharpsl_battery_levels_acin, 225 .status_high_acin = 188, 226 .status_low_acin = 178, 227 .status_high_noac = 185, 228 .status_low_noac = 175, 229 }; 230 231 static struct platform_device *spitzpm_device; 232 233 static int __devinit spitzpm_init(void) 234 { 235 int ret; 236 237 if (!machine_is_spitz() && !machine_is_akita() 238 && !machine_is_borzoi()) 239 return -ENODEV; 240 241 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 242 if (!spitzpm_device) 243 return -ENOMEM; 244 245 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 246 ret = platform_device_add(spitzpm_device); 247 248 if (ret) 249 platform_device_put(spitzpm_device); 250 251 return ret; 252 } 253 254 static void spitzpm_exit(void) 255 { 256 platform_device_unregister(spitzpm_device); 257 } 258 259 module_init(spitzpm_init); 260 module_exit(spitzpm_exit); 261