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 = GPIO18_GPIO; 90 91 static void spitz_presuspend(void) 92 { 93 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 94 95 /* GPIO Sleep Register */ 96 PGSR0 = 0x00144018; 97 PGSR1 = 0x00EF0000; 98 if (machine_is_akita()) { 99 PGSR2 = 0x2121C000; 100 PGSR3 = 0x00600400; 101 } else { 102 PGSR2 = 0x0121C000; 103 PGSR3 = 0x00600000; 104 } 105 106 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 107 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 108 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 109 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 110 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 111 112 pxa2xx_mfp_config(&gpio18_config, 1); 113 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 114 gpio_free(18); 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 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 126 PCFR = PCFR_GPR_EN | PCFR_OPDE; 127 } 128 129 static void spitz_postsuspend(void) 130 { 131 } 132 133 static int spitz_should_wakeup(unsigned int resume_on_alarm) 134 { 135 int is_resume = 0; 136 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 137 138 if (spitz_last_ac_status != acin) { 139 if (acin) { 140 /* charge on */ 141 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 142 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 143 } else { 144 /* charge off */ 145 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 146 sharpsl_pm_led(SHARPSL_LED_OFF); 147 sharpsl_pm.machinfo->charge(0); 148 sharpsl_pm.charge_mode = CHRG_OFF; 149 } 150 spitz_last_ac_status = acin; 151 /* Return to suspend as this must be what we were woken for */ 152 return 0; 153 } 154 155 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 156 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 157 158 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 159 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 160 161 if (resume_on_alarm && (PEDR & PWER_RTC)) 162 is_resume |= PWER_RTC; 163 164 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 165 return is_resume; 166 } 167 168 static unsigned long spitz_charger_wakeup(void) 169 { 170 unsigned long ret; 171 ret = ((!gpio_get_value(SPITZ_GPIO_KEY_INT) 172 << GPIO_bit(SPITZ_GPIO_KEY_INT)) 173 | gpio_get_value(SPITZ_GPIO_SYNC)); 174 return ret; 175 } 176 177 unsigned long spitzpm_read_devdata(int type) 178 { 179 switch (type) { 180 case SHARPSL_STATUS_ACIN: 181 return !gpio_get_value(SPITZ_GPIO_AC_IN); 182 case SHARPSL_STATUS_LOCK: 183 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); 184 case SHARPSL_STATUS_CHRGFULL: 185 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); 186 case SHARPSL_STATUS_FATAL: 187 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); 188 case SHARPSL_ACIN_VOLT: 189 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 190 case SHARPSL_BATT_TEMP: 191 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 192 case SHARPSL_BATT_VOLT: 193 default: 194 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 195 } 196 } 197 198 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 199 .init = spitz_charger_init, 200 .exit = NULL, 201 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 202 .gpio_acin = SPITZ_GPIO_AC_IN, 203 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 204 .batfull_irq = 1, 205 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 206 .discharge = spitz_discharge, 207 .discharge1 = spitz_discharge1, 208 .charge = spitz_charge, 209 .measure_temp = spitz_measure_temp, 210 .presuspend = spitz_presuspend, 211 .postsuspend = spitz_postsuspend, 212 .read_devdata = spitzpm_read_devdata, 213 .charger_wakeup = spitz_charger_wakeup, 214 .should_wakeup = spitz_should_wakeup, 215 #if defined(CONFIG_LCD_CORGI) 216 .backlight_limit = corgi_lcd_limit_intensity, 217 #endif 218 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 219 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 220 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 221 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 222 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 223 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 224 .bat_levels = 40, 225 .bat_levels_noac = sharpsl_battery_levels_noac, 226 .bat_levels_acin = sharpsl_battery_levels_acin, 227 .status_high_acin = 188, 228 .status_low_acin = 178, 229 .status_high_noac = 185, 230 .status_low_noac = 175, 231 }; 232 233 static struct platform_device *spitzpm_device; 234 235 static int spitzpm_init(void) 236 { 237 int ret; 238 239 if (!machine_is_spitz() && !machine_is_akita() 240 && !machine_is_borzoi()) 241 return -ENODEV; 242 243 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 244 if (!spitzpm_device) 245 return -ENOMEM; 246 247 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 248 ret = platform_device_add(spitzpm_device); 249 250 if (ret) 251 platform_device_put(spitzpm_device); 252 253 return ret; 254 } 255 256 static void spitzpm_exit(void) 257 { 258 platform_device_unregister(spitzpm_device); 259 } 260 261 module_init(spitzpm_init); 262 module_exit(spitzpm_exit); 263