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 #include <mach/hardware.h> 22 23 #include <mach/spitz.h> 24 #include "pxa27x.h" 25 #include "sharpsl_pm.h" 26 27 #include "generic.h" 28 29 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */ 30 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */ 31 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */ 32 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */ 33 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */ 34 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */ 35 36 static int spitz_last_ac_status; 37 38 static struct gpio spitz_charger_gpios[] = { 39 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" }, 40 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" }, 41 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" }, 42 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" }, 43 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" }, 44 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" }, 45 }; 46 47 static void spitz_charger_init(void) 48 { 49 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios)); 50 } 51 52 static void spitz_measure_temp(int on) 53 { 54 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on); 55 } 56 57 static void spitz_charge(int on) 58 { 59 if (on) { 60 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) { 61 gpio_set_value(SPITZ_GPIO_JK_B, 1); 62 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 63 } else { 64 gpio_set_value(SPITZ_GPIO_JK_B, 0); 65 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0); 66 } 67 } else { 68 gpio_set_value(SPITZ_GPIO_JK_B, 0); 69 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1); 70 } 71 } 72 73 static void spitz_discharge(int on) 74 { 75 gpio_set_value(SPITZ_GPIO_JK_A, on); 76 } 77 78 /* HACK - For unknown reasons, accurate voltage readings are only made with a load 79 on the power bus which the green led on spitz provides */ 80 static void spitz_discharge1(int on) 81 { 82 gpio_set_value(SPITZ_GPIO_LED_GREEN, on); 83 } 84 85 static unsigned long gpio18_config = GPIO18_GPIO; 86 87 static void spitz_presuspend(void) 88 { 89 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 90 91 /* GPIO Sleep Register */ 92 PGSR0 = 0x00144018; 93 PGSR1 = 0x00EF0000; 94 if (machine_is_akita()) { 95 PGSR2 = 0x2121C000; 96 PGSR3 = 0x00600400; 97 } else { 98 PGSR2 = 0x0121C000; 99 PGSR3 = 0x00600000; 100 } 101 102 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 103 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 104 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 105 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 106 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 107 108 pxa2xx_mfp_config(&gpio18_config, 1); 109 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 110 gpio_free(18); 111 112 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 113 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 114 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 115 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 116 PKSR = 0xffffffff; /* clear */ 117 118 /* nRESET_OUT Disable */ 119 PSLR |= PSLR_SL_ROD; 120 121 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 122 PCFR = PCFR_GPR_EN | PCFR_OPDE; 123 } 124 125 static void spitz_postsuspend(void) 126 { 127 } 128 129 static int spitz_should_wakeup(unsigned int resume_on_alarm) 130 { 131 int is_resume = 0; 132 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 133 134 if (spitz_last_ac_status != acin) { 135 if (acin) { 136 /* charge on */ 137 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 138 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 139 } else { 140 /* charge off */ 141 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 142 sharpsl_pm_led(SHARPSL_LED_OFF); 143 sharpsl_pm.machinfo->charge(0); 144 sharpsl_pm.charge_mode = CHRG_OFF; 145 } 146 spitz_last_ac_status = acin; 147 /* Return to suspend as this must be what we were woken for */ 148 return 0; 149 } 150 151 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 152 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 153 154 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 155 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 156 157 if (resume_on_alarm && (PEDR & PWER_RTC)) 158 is_resume |= PWER_RTC; 159 160 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 161 return is_resume; 162 } 163 164 static bool spitz_charger_wakeup(void) 165 { 166 return !gpio_get_value(SPITZ_GPIO_KEY_INT) || 167 gpio_get_value(SPITZ_GPIO_SYNC); 168 } 169 170 unsigned long spitzpm_read_devdata(int type) 171 { 172 switch (type) { 173 case SHARPSL_STATUS_ACIN: 174 return !gpio_get_value(SPITZ_GPIO_AC_IN); 175 case SHARPSL_STATUS_LOCK: 176 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); 177 case SHARPSL_STATUS_CHRGFULL: 178 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); 179 case SHARPSL_STATUS_FATAL: 180 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); 181 case SHARPSL_ACIN_VOLT: 182 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 183 case SHARPSL_BATT_TEMP: 184 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 185 case SHARPSL_BATT_VOLT: 186 default: 187 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 188 } 189 } 190 191 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 192 .init = spitz_charger_init, 193 .exit = NULL, 194 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 195 .gpio_acin = SPITZ_GPIO_AC_IN, 196 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 197 .batfull_irq = 1, 198 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 199 .discharge = spitz_discharge, 200 .discharge1 = spitz_discharge1, 201 .charge = spitz_charge, 202 .measure_temp = spitz_measure_temp, 203 .presuspend = spitz_presuspend, 204 .postsuspend = spitz_postsuspend, 205 .read_devdata = spitzpm_read_devdata, 206 .charger_wakeup = spitz_charger_wakeup, 207 .should_wakeup = spitz_should_wakeup, 208 #if defined(CONFIG_LCD_CORGI) 209 .backlight_limit = corgi_lcd_limit_intensity, 210 #endif 211 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 212 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 213 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 214 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 215 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 216 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 217 .bat_levels = 40, 218 .bat_levels_noac = sharpsl_battery_levels_noac, 219 .bat_levels_acin = sharpsl_battery_levels_acin, 220 .status_high_acin = 188, 221 .status_low_acin = 178, 222 .status_high_noac = 185, 223 .status_low_noac = 175, 224 }; 225 226 static struct platform_device *spitzpm_device; 227 228 static int spitzpm_init(void) 229 { 230 int ret; 231 232 if (!machine_is_spitz() && !machine_is_akita() 233 && !machine_is_borzoi()) 234 return -ENODEV; 235 236 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 237 if (!spitzpm_device) 238 return -ENOMEM; 239 240 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 241 ret = platform_device_add(spitzpm_device); 242 243 if (ret) 244 platform_device_put(spitzpm_device); 245 246 return ret; 247 } 248 249 static void spitzpm_exit(void) 250 { 251 platform_device_unregister(spitzpm_device); 252 } 253 254 module_init(spitzpm_init); 255 module_exit(spitzpm_exit); 256