1/* 2 * Based on spitz_pm.c and sharp code. 3 * 4 * Copyright (C) 2001 SHARP 5 * Copyright 2005 Pavel Machek <pavel@suse.cz> 6 * 7 * Distribute under GPLv2. 8 * 9 * Li-ion batteries are angry beasts, and they like to explode. This driver is not finished, 10 * and sometimes charges them when it should not. If it makes angry lithium to come your way... 11 * ...well, you have been warned. 12 * 13 * Actually, this should be quite safe, it seems sharp leaves charger enabled by default, 14 * and my collie did not explode (yet). 15 */ 16 17#include <linux/module.h> 18#include <linux/stat.h> 19#include <linux/init.h> 20#include <linux/kernel.h> 21#include <linux/delay.h> 22#include <linux/interrupt.h> 23#include <linux/device.h> 24#include <linux/platform_device.h> 25 26#include <asm/irq.h> 27#include <asm/mach-types.h> 28#include <asm/hardware.h> 29#include <asm/hardware/scoop.h> 30#include <asm/dma.h> 31#include <asm/arch/collie.h> 32#include <asm/mach/sharpsl_param.h> 33#include <asm/hardware/sharpsl_pm.h> 34 35#include "../drivers/mfd/ucb1x00.h" 36 37static struct ucb1x00 *ucb; 38static int ad_revise; 39 40#define ADCtoPower(x) ((330 * x * 2) / 1024) 41 42static void collie_charger_init(void) 43{ 44 int err; 45 46 if (sharpsl_param.adadj != -1) 47 ad_revise = sharpsl_param.adadj; 48 49 /* Register interrupt handler. */ 50 if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, IRQF_DISABLED, 51 "ACIN", sharpsl_ac_isr))) { 52 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN); 53 return; 54 } 55 if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, IRQF_DISABLED, 56 "CO", sharpsl_chrg_full_isr))) { 57 free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr); 58 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO); 59 return; 60 } 61 62 ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON | 63 COLLIE_TC35143_GPIO_BBAT_ON); 64 return; 65} 66 67static void collie_measure_temp(int on) 68{ 69 if (on) 70 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0); 71 else 72 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON); 73} 74 75static void collie_charge(int on) 76{ 77 extern struct platform_device colliescoop_device; 78 79 /* Zaurus seems to contain LTC1731; it should know when to 80 * stop charging itself, so setting charge on should be 81 * relatively harmless (as long as it is not done too often). 82 */ 83 if (on) { 84 set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON); 85 } else { 86 reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON); 87 } 88} 89 90static void collie_discharge(int on) 91{ 92} 93 94static void collie_discharge1(int on) 95{ 96} 97 98static void collie_presuspend(void) 99{ 100} 101 102static void collie_postsuspend(void) 103{ 104} 105 106static int collie_should_wakeup(unsigned int resume_on_alarm) 107{ 108 return 0; 109} 110 111static unsigned long collie_charger_wakeup(void) 112{ 113 return 0; 114} 115 116int collie_read_backup_battery(void) 117{ 118 int voltage; 119 120 ucb1x00_adc_enable(ucb); 121 122 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0); 123 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC); 124 125 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON); 126 ucb1x00_adc_disable(ucb); 127 128 printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage); 129 130 return ADCtoPower(voltage); 131} 132 133int collie_read_main_battery(void) 134{ 135 int voltage, voltage_rev, voltage_volts; 136 137 ucb1x00_adc_enable(ucb); 138 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON); 139 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0); 140 141 mdelay(1); 142 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC); 143 144 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON); 145 ucb1x00_adc_disable(ucb); 146 147 voltage_rev = voltage + ((ad_revise * voltage) / 652); 148 voltage_volts = ADCtoPower(voltage_rev); 149 150 printk("Main battery = %d(%d)\n", voltage_volts, voltage); 151 152 if (voltage != -1) 153 return voltage_volts; 154 else 155 return voltage; 156} 157 158int collie_read_temp(void) 159{ 160 int voltage; 161 162 163 ucb1x00_adc_enable(ucb); 164 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0); 165 /* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */ 166 voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC); 167 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON); 168 ucb1x00_adc_disable(ucb); 169 170 printk("Battery temp = %d\n", voltage); 171 return voltage; 172} 173 174static unsigned long read_devdata(int which) 175{ 176 switch (which) { 177 case SHARPSL_BATT_VOLT: 178 return collie_read_main_battery(); 179 case SHARPSL_BATT_TEMP: 180 return collie_read_temp(); 181 case SHARPSL_ACIN_VOLT: 182 return 500; 183 case SHARPSL_STATUS_ACIN: { 184 int ret = GPLR & COLLIE_GPIO_AC_IN; 185 printk("AC status = %d\n", ret); 186 return ret; 187 } 188 case SHARPSL_STATUS_FATAL: { 189 int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW; 190 printk("Fatal bat = %d\n", ret); 191 return ret; 192 } 193 default: 194 return ~0; 195 } 196} 197 198struct battery_thresh collie_battery_levels_acin[] = { 199 { 420, 100}, 200 { 417, 95}, 201 { 415, 90}, 202 { 413, 80}, 203 { 411, 75}, 204 { 408, 70}, 205 { 406, 60}, 206 { 403, 50}, 207 { 398, 40}, 208 { 391, 25}, 209 { 10, 5}, 210 { 0, 0}, 211}; 212 213struct battery_thresh collie_battery_levels[] = { 214 { 394, 100}, 215 { 390, 95}, 216 { 380, 90}, 217 { 370, 80}, 218 { 368, 75}, /* From sharp code: battery high with frontlight */ 219 { 366, 70}, /* 60..90 -- fake values invented by me for testing */ 220 { 364, 60}, 221 { 362, 50}, 222 { 360, 40}, 223 { 358, 25}, /* From sharp code: battery low with frontlight */ 224 { 356, 5}, /* From sharp code: battery verylow with frontlight */ 225 { 0, 0}, 226}; 227 228struct sharpsl_charger_machinfo collie_pm_machinfo = { 229 .init = collie_charger_init, 230 .read_devdata = read_devdata, 231 .discharge = collie_discharge, 232 .discharge1 = collie_discharge1, 233 .charge = collie_charge, 234 .measure_temp = collie_measure_temp, 235 .presuspend = collie_presuspend, 236 .postsuspend = collie_postsuspend, 237 .charger_wakeup = collie_charger_wakeup, 238 .should_wakeup = collie_should_wakeup, 239 .bat_levels = 12, 240 .bat_levels_noac = collie_battery_levels, 241 .bat_levels_acin = collie_battery_levels_acin, 242 .status_high_acin = 368, 243 .status_low_acin = 358, 244 .status_high_noac = 368, 245 .status_low_noac = 358, 246 .charge_on_volt = 350, /* spitz uses 2.90V, but lets play it safe. */ 247 .charge_on_temp = 550, 248 .charge_acin_high = 550, /* collie does not seem to have sensor for this, anyway */ 249 .charge_acin_low = 450, /* ignored, too */ 250 .fatal_acin_volt = 356, 251 .fatal_noacin_volt = 356, 252 253 .batfull_irq = 1, /* We do not want periodical charge restarts */ 254}; 255 256static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev) 257{ 258 sharpsl_pm.machinfo = &collie_pm_machinfo; 259 ucb = pdev->ucb; 260 return 0; 261} 262 263static struct ucb1x00_driver collie_pm_ucb_driver = { 264 .add = collie_pm_ucb_add, 265}; 266 267static struct platform_device *collie_pm_device; 268 269static int __init collie_pm_init(void) 270{ 271 int ret; 272 273 collie_pm_device = platform_device_alloc("sharpsl-pm", -1); 274 if (!collie_pm_device) 275 return -ENOMEM; 276 277 collie_pm_device->dev.platform_data = &collie_pm_machinfo; 278 ret = platform_device_add(collie_pm_device); 279 280 if (ret) 281 platform_device_put(collie_pm_device); 282 283 if (!ret) 284 ret = ucb1x00_register_driver(&collie_pm_ucb_driver); 285 286 return ret; 287} 288 289static void __exit collie_pm_exit(void) 290{ 291 ucb1x00_unregister_driver(&collie_pm_ucb_driver); 292 platform_device_unregister(collie_pm_device); 293} 294 295module_init(collie_pm_init); 296module_exit(collie_pm_exit); 297