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/gpio.h> 18 #include <linux/gpio-pxa.h> 19 #include <linux/interrupt.h> 20 #include <linux/platform_device.h> 21 #include <linux/apm-emulation.h> 22 23 #include <asm/irq.h> 24 #include <asm/mach-types.h> 25 #include <mach/hardware.h> 26 27 #include <mach/spitz.h> 28 #include <mach/pxa27x.h> 29 #include <mach/sharpsl_pm.h> 30 31 #include "generic.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 struct gpio spitz_charger_gpios[] = { 43 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, 44 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, 45 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" }, 46 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, 47 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, 48 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, 49 }; 50 51 static void spitz_charger_init(void) 52 { 53 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); 54 } 55 56 static void spitz_measure_temp(int on) 57 { 58 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 59 } 60 61 static void spitz_charge(int on) 62 { 63 if (on) { 64 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 65 gpio_set_value(SPITZ_GPIO_JK_B, 1); 66 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 67 } else { 68 gpio_set_value(SPITZ_GPIO_JK_B, 0); 69 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 70 } 71 } else { 72 gpio_set_value(SPITZ_GPIO_JK_B, 0); 73 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 74 } 75 } 76 77 static void spitz_discharge(int on) 78 { 79 gpio_set_value(SPITZ_GPIO_JK_A, on); 80 } 81 82 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 83 on the power bus which the green led on spitz provides */ 84 static void spitz_discharge1(int on) 85 { 86 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 87 } 88 89 static unsigned long gpio18_config[] = { 90 GPIO18_RDY, 91 GPIO18_GPIO, 92 }; 93 94 static void spitz_presuspend(void) 95 { 96 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 97 98 /* GPIO Sleep Register */ 99 PGSR0 = 0x00144018; 100 PGSR1 = 0x00EF0000; 101 if (machine_is_akita()) { 102 PGSR2 = 0x2121C000; 103 PGSR3 = 0x00600400; 104 } else { 105 PGSR2 = 0x0121C000; 106 PGSR3 = 0x00600000; 107 } 108 109 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 110 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 111 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 112 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 113 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 114 115 pxa2xx_mfp_config(&gpio18_config[0], 1); 116 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 117 gpio_free(18); 118 119 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 120 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 121 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 122 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 123 PKSR = 0xffffffff; /* clear */ 124 125 /* nRESET_OUT Disable */ 126 PSLR |= PSLR_SL_ROD; 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 pxa2xx_mfp_config(&gpio18_config[1], 1); 135 } 136 137 static int spitz_should_wakeup(unsigned int resume_on_alarm) 138 { 139 int is_resume = 0; 140 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 141 142 if (spitz_last_ac_status != acin) { 143 if (acin) { 144 /* charge on */ 145 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 146 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 147 } else { 148 /* charge off */ 149 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 150 sharpsl_pm_led(SHARPSL_LED_OFF); 151 sharpsl_pm.machinfo->charge(0); 152 sharpsl_pm.charge_mode = CHRG_OFF; 153 } 154 spitz_last_ac_status = acin; 155 /* Return to suspend as this must be what we were woken for */ 156 return 0; 157 } 158 159 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 160 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 161 162 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 163 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 164 165 if (resume_on_alarm && (PEDR & PWER_RTC)) 166 is_resume |= PWER_RTC; 167 168 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 169 return is_resume; 170 } 171 172 static unsigned long spitz_charger_wakeup(void) 173 { 174 unsigned long ret; 175 ret = ((!gpio_get_value(SPITZ_GPIO_KEY_INT) 176 << GPIO_bit(SPITZ_GPIO_KEY_INT)) 177 | gpio_get_value(SPITZ_GPIO_SYNC)); 178 return ret; 179 } 180 181 unsigned long spitzpm_read_devdata(int type) 182 { 183 switch (type) { 184 case SHARPSL_STATUS_ACIN: 185 return !gpio_get_value(SPITZ_GPIO_AC_IN); 186 case SHARPSL_STATUS_LOCK: 187 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); 188 case SHARPSL_STATUS_CHRGFULL: 189 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); 190 case SHARPSL_STATUS_FATAL: 191 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); 192 case SHARPSL_ACIN_VOLT: 193 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 194 case SHARPSL_BATT_TEMP: 195 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 196 case SHARPSL_BATT_VOLT: 197 default: 198 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 199 } 200 } 201 202 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 203 .init = spitz_charger_init, 204 .exit = NULL, 205 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 206 .gpio_acin = SPITZ_GPIO_AC_IN, 207 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 208 .batfull_irq = 1, 209 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 210 .discharge = spitz_discharge, 211 .discharge1 = spitz_discharge1, 212 .charge = spitz_charge, 213 .measure_temp = spitz_measure_temp, 214 .presuspend = spitz_presuspend, 215 .postsuspend = spitz_postsuspend, 216 .read_devdata = spitzpm_read_devdata, 217 .charger_wakeup = spitz_charger_wakeup, 218 .should_wakeup = spitz_should_wakeup, 219 #if defined(CONFIG_LCD_CORGI) 220 .backlight_limit = corgi_lcd_limit_intensity, 221 #endif 222 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 223 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 224 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 225 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 226 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 227 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 228 .bat_levels = 40, 229 .bat_levels_noac = sharpsl_battery_levels_noac, 230 .bat_levels_acin = sharpsl_battery_levels_acin, 231 .status_high_acin = 188, 232 .status_low_acin = 178, 233 .status_high_noac = 185, 234 .status_low_noac = 175, 235 }; 236 237 static struct platform_device *spitzpm_device; 238 239 static int __devinit spitzpm_init(void) 240 { 241 int ret; 242 243 if (!machine_is_spitz() && !machine_is_akita() 244 && !machine_is_borzoi()) 245 return -ENODEV; 246 247 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 248 if (!spitzpm_device) 249 return -ENOMEM; 250 251 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 252 ret = platform_device_add(spitzpm_device); 253 254 if (ret) 255 platform_device_put(spitzpm_device); 256 257 return ret; 258 } 259 260 static void spitzpm_exit(void) 261 { 262 platform_device_unregister(spitzpm_device); 263 } 264 265 module_init(spitzpm_init); 266 module_exit(spitzpm_exit); 267