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 #include <linux/spi/corgi_lcd.h> 19 20 #include <asm/irq.h> 21 #include <asm/mach-types.h> 22 23 #include "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 void spitz_charger_init(void) 39 { 40 gpio_request(SPITZ_GPIO_KEY_INT, "Keyboard Interrupt"); 41 gpio_direction_input(SPITZ_GPIO_KEY_INT); 42 gpio_request(SPITZ_GPIO_SYNC, "Sync"); 43 gpio_direction_input(SPITZ_GPIO_SYNC); 44 gpio_request(SPITZ_GPIO_AC_IN, "Charger Detection"); 45 gpio_direction_input(SPITZ_GPIO_AC_IN); 46 gpio_request(SPITZ_GPIO_ADC_TEMP_ON, "ADC Temp On"); 47 gpio_direction_output(SPITZ_GPIO_ADC_TEMP_ON, 0); 48 gpio_request(SPITZ_GPIO_JK_B, "JK B"); 49 gpio_direction_output(SPITZ_GPIO_JK_B, 0); 50 gpio_request(SPITZ_GPIO_CHRG_ON, "Charger On"); 51 gpio_direction_output(SPITZ_GPIO_CHRG_ON, 0); 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 = GPIO18_GPIO; 88 89 static void spitz_presuspend(void) 90 { 91 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 92 93 /* GPIO Sleep Register */ 94 PGSR0 = 0x00144018; 95 PGSR1 = 0x00EF0000; 96 if (machine_is_akita()) { 97 PGSR2 = 0x2121C000; 98 PGSR3 = 0x00600400; 99 } else { 100 PGSR2 = 0x0121C000; 101 PGSR3 = 0x00600000; 102 } 103 104 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT; 105 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT; 106 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT; 107 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT; 108 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0); 109 110 pxa2xx_mfp_config(&gpio18_config, 1); 111 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown"); 112 gpio_free(18); 113 114 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT); 115 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 116 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC; 117 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET); 118 PKSR = 0xffffffff; /* clear */ 119 120 /* nRESET_OUT Disable */ 121 PSLR |= PSLR_SL_ROD; 122 123 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */ 124 PCFR = PCFR_GPR_EN | PCFR_OPDE; 125 } 126 127 static void spitz_postsuspend(void) 128 { 129 } 130 131 static int spitz_should_wakeup(unsigned int resume_on_alarm) 132 { 133 int is_resume = 0; 134 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN); 135 136 if (spitz_last_ac_status != acin) { 137 if (acin) { 138 /* charge on */ 139 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG; 140 dev_dbg(sharpsl_pm.dev, "AC Inserted\n"); 141 } else { 142 /* charge off */ 143 dev_dbg(sharpsl_pm.dev, "AC Removed\n"); 144 sharpsl_pm_led(SHARPSL_LED_OFF); 145 sharpsl_pm.machinfo->charge(0); 146 sharpsl_pm.charge_mode = CHRG_OFF; 147 } 148 spitz_last_ac_status = acin; 149 /* Return to suspend as this must be what we were woken for */ 150 return 0; 151 } 152 153 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT)) 154 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT); 155 156 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC)) 157 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC); 158 159 if (resume_on_alarm && (PEDR & PWER_RTC)) 160 is_resume |= PWER_RTC; 161 162 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume); 163 return is_resume; 164 } 165 166 static bool spitz_charger_wakeup(void) 167 { 168 return !gpio_get_value(SPITZ_GPIO_KEY_INT) || 169 gpio_get_value(SPITZ_GPIO_SYNC); 170 } 171 172 static unsigned long spitzpm_read_devdata(int type) 173 { 174 switch (type) { 175 case SHARPSL_STATUS_ACIN: 176 return !gpio_get_value(SPITZ_GPIO_AC_IN); 177 case SHARPSL_STATUS_LOCK: 178 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock); 179 case SHARPSL_STATUS_CHRGFULL: 180 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull); 181 case SHARPSL_STATUS_FATAL: 182 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal); 183 case SHARPSL_ACIN_VOLT: 184 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT); 185 case SHARPSL_BATT_TEMP: 186 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP); 187 case SHARPSL_BATT_VOLT: 188 default: 189 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT); 190 } 191 } 192 193 struct sharpsl_charger_machinfo spitz_pm_machinfo = { 194 .init = spitz_charger_init, 195 .exit = NULL, 196 .gpio_batlock = SPITZ_GPIO_BAT_COVER, 197 .gpio_acin = SPITZ_GPIO_AC_IN, 198 .gpio_batfull = SPITZ_GPIO_CHRG_FULL, 199 .batfull_irq = 1, 200 .gpio_fatal = SPITZ_GPIO_FATAL_BAT, 201 .discharge = spitz_discharge, 202 .discharge1 = spitz_discharge1, 203 .charge = spitz_charge, 204 .measure_temp = spitz_measure_temp, 205 .presuspend = spitz_presuspend, 206 .postsuspend = spitz_postsuspend, 207 .read_devdata = spitzpm_read_devdata, 208 .charger_wakeup = spitz_charger_wakeup, 209 .should_wakeup = spitz_should_wakeup, 210 #if defined(CONFIG_LCD_CORGI) 211 .backlight_limit = corgi_lcd_limit_intensity, 212 #endif 213 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT, 214 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP, 215 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH, 216 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW, 217 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT, 218 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT, 219 .bat_levels = 40, 220 .bat_levels_noac = sharpsl_battery_levels_noac, 221 .bat_levels_acin = sharpsl_battery_levels_acin, 222 .status_high_acin = 188, 223 .status_low_acin = 178, 224 .status_high_noac = 185, 225 .status_low_noac = 175, 226 }; 227 228 static struct platform_device *spitzpm_device; 229 230 static int spitzpm_init(void) 231 { 232 int ret; 233 234 if (!machine_is_spitz() && !machine_is_akita() 235 && !machine_is_borzoi()) 236 return -ENODEV; 237 238 spitzpm_device = platform_device_alloc("sharpsl-pm", -1); 239 if (!spitzpm_device) 240 return -ENOMEM; 241 242 spitzpm_device->dev.platform_data = &spitz_pm_machinfo; 243 ret = platform_device_add(spitzpm_device); 244 245 if (ret) 246 platform_device_put(spitzpm_device); 247 248 return ret; 249 } 250 251 static void spitzpm_exit(void) 252 { 253 platform_device_unregister(spitzpm_device); 254 } 255 256 module_init(spitzpm_init); 257 module_exit(spitzpm_exit); 258