1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Battery and Power Management code for the Sharp SL-Cxx00 4 * 5 * Copyright (c) 2005 Richard Purdie 6 */ 7 8 #include <linux/module.h> 9 #include <linux/stat.h> 10 #include <linux/init.h> 11 #include <linux/kernel.h> 12 #include <linux/delay.h> 13 #include <linux/gpio.h> 14 #include <linux/gpio-pxa.h> 15 #include <linux/interrupt.h> 16 #include <linux/platform_device.h> 17 #include <linux/apm-emulation.h> 18 19 #include <asm/irq.h> 20 #include <asm/mach-types.h> 21 22 #include "spitz.h" 23 #include "pxa27x.h" 24 #include "sharpsl_pm.h" 25 26 #include "generic.h" 27 28 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 29 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 30 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 31 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 32 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 33 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 34 35 static int spitz_last_ac_status; 36 37 static struct gpio spitz_charger_gpios[] = { 38 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, 39 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, 40 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" }, 41 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, 42 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, 43 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, 44 }; 45 46 static void spitz_charger_init(void) 47 { 48 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); 49 } 50 51 static void spitz_measure_temp(int on) 52 { 53 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 54 } 55 56 static void spitz_charge(int on) 57 { 58 if (on) { 59 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 60 gpio_set_value(SPITZ_GPIO_JK_B, 1); 61 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 62 } else { 63 gpio_set_value(SPITZ_GPIO_JK_B, 0); 64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 65 } 66 } else { 67 gpio_set_value(SPITZ_GPIO_JK_B, 0); 68 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 69 } 70 } 71 72 static void spitz_discharge(int on) 73 { 74 gpio_set_value(SPITZ_GPIO_JK_A, on); 75 } 76 77 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 78 on the power bus which the green led on spitz provides */ 79 static void spitz_discharge1(int on) 80 { 81 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 82 } 83 84 static unsigned long gpio18_config = GPIO18_GPIO; 85 86 static void spitz_presuspend(void) 87 { 88 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 89 90 /* GPIO Sleep Register */ 91 PGSR0 = 0x00144018; 92 PGSR1 = 0x00EF0000; 93 if (machine_is_akita()) { 94 PGSR2 = 0x2121C000; 95 PGSR3 = 0x00600400; 96 } else { 97 PGSR2 = 0x0121C000; 98 PGSR3 = 0x00600000; 99 } 100 101 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 102 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 103 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 104 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 105 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 106 107 pxa2xx_mfp_config(&gpio18_config, 1); 108 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 109 gpio_free(18); 110 111 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 112 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 113 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 114 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 115 PKSR = 0xffffffff; /* clear */ 116 117 /* nRESET_OUT Disable */ 118 PSLR |= PSLR_SL_ROD; 119 120 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 121 PCFR = PCFR_GPR_EN | PCFR_OPDE; 122 } 123 124 static void spitz_postsuspend(void) 125 { 126 } 127 128 static int spitz_should_wakeup(unsigned int resume_on_alarm) 129 { 130 int is_resume = 0; 131 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 132 133 if (spitz_last_ac_status != acin) { 134 if (acin) { 135 /* charge on */ 136 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 137 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 138 } else { 139 /* charge off */ 140 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 141 sharpsl_pm_led(SHARPSL_LED_OFF); 142 sharpsl_pm.machinfo->charge(0); 143 sharpsl_pm.charge_mode = CHRG_OFF; 144 } 145 spitz_last_ac_status = acin; 146 /* Return to suspend as this must be what we were woken for */ 147 return 0; 148 } 149 150 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 151 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 152 153 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 154 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 155 156 if (resume_on_alarm && (PEDR & PWER_RTC)) 157 is_resume |= PWER_RTC; 158 159 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 160 return is_resume; 161 } 162 163 static bool spitz_charger_wakeup(void) 164 { 165 return !gpio_get_value(SPITZ_GPIO_KEY_INT) || 166 gpio_get_value(SPITZ_GPIO_SYNC); 167 } 168 169 static unsigned long spitzpm_read_devdata(int type) 170 { 171 switch (type) { 172 case SHARPSL_STATUS_ACIN: 173 return !gpio_get_value(SPITZ_GPIO_AC_IN); 174 case SHARPSL_STATUS_LOCK: 175 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); 176 case SHARPSL_STATUS_CHRGFULL: 177 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); 178 case SHARPSL_STATUS_FATAL: 179 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); 180 case SHARPSL_ACIN_VOLT: 181 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 182 case SHARPSL_BATT_TEMP: 183 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 184 case SHARPSL_BATT_VOLT: 185 default: 186 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 187 } 188 } 189 190 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 191 .init = spitz_charger_init, 192 .exit = NULL, 193 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 194 .gpio_acin = SPITZ_GPIO_AC_IN, 195 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 196 .batfull_irq = 1, 197 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 198 .discharge = spitz_discharge, 199 .discharge1 = spitz_discharge1, 200 .charge = spitz_charge, 201 .measure_temp = spitz_measure_temp, 202 .presuspend = spitz_presuspend, 203 .postsuspend = spitz_postsuspend, 204 .read_devdata = spitzpm_read_devdata, 205 .charger_wakeup = spitz_charger_wakeup, 206 .should_wakeup = spitz_should_wakeup, 207 #if defined(CONFIG_LCD_CORGI) 208 .backlight_limit = corgi_lcd_limit_intensity, 209 #endif 210 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 211 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 212 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 213 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 214 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 215 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 216 .bat_levels = 40, 217 .bat_levels_noac = sharpsl_battery_levels_noac, 218 .bat_levels_acin = sharpsl_battery_levels_acin, 219 .status_high_acin = 188, 220 .status_low_acin = 178, 221 .status_high_noac = 185, 222 .status_low_noac = 175, 223 }; 224 225 static struct platform_device *spitzpm_device; 226 227 static int spitzpm_init(void) 228 { 229 int ret; 230 231 if (!machine_is_spitz() && !machine_is_akita() 232 && !machine_is_borzoi()) 233 return -ENODEV; 234 235 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 236 if (!spitzpm_device) 237 return -ENOMEM; 238 239 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 240 ret = platform_device_add(spitzpm_device); 241 242 if (ret) 243 platform_device_put(spitzpm_device); 244 245 return ret; 246 } 247 248 static void spitzpm_exit(void) 249 { 250 platform_device_unregister(spitzpm_device); 251 } 252 253 module_init(spitzpm_init); 254 module_exit(spitzpm_exit); 255