arch/arm/mach-sa1100/collie_pm.c

   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
  14 #include <linux/module.h>
  15 #include <linux/stat.h>
  16 #include <linux/init.h>
  17 #include <linux/kernel.h>
  18 #include <linux/delay.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/device.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <asm/irq.h>
  24 #include <asm/mach-types.h>
  25 #include <asm/hardware.h>
  26 #include <asm/hardware/scoop.h>
  27 #include <asm/dma.h>
  28 #include <asm/arch/collie.h>
  29 #include <asm/mach/sharpsl_param.h>
  30 #include <asm/hardware/sharpsl_pm.h>
  31
  32 #include "../drivers/mfd/ucb1x00.h"
  33
  34 static struct ucb1x00 *ucb;
  35 static int ad_revise;
  36
  37 #define ADCtoPower(x)          ((330 * x * 2) / 1024)
  38
  39 static void collie_charger_init(void)
  40 {
  41         int err;
  42
  43         if (sharpsl_param.adadj != -1) {
  44                 ad_revise = sharpsl_param.adadj;
  45         }
  46
  47         /* Register interrupt handler. */
  48         if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, IRQF_DISABLED,
  49                                "ACIN", sharpsl_ac_isr))) {
  50                 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
  51                 return;
  52         }
  53         if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, IRQF_DISABLED,
  54                                "CO", sharpsl_chrg_full_isr))) {
  55                 free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
  56                 printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
  57                 return;
  58         }
  59
  60         ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
  61                                    COLLIE_TC35143_GPIO_BBAT_ON);
  62         return;
  63 }
  64
  65 static void collie_measure_temp(int on)
  66 {
  67         if (on)
  68                 ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
  69         else
  70                 ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
  71 }
  72
  73 static void collie_charge(int on)
  74 {
  75         if (on) {
  76                 printk("Should start charger\n");
  77         } else {
  78                 printk("Should stop charger\n");
  79         }
  80 #ifdef I_AM_SURE
  81
  82         /* Zaurus seems to contain LTC1731 ; it should know when to
  83          * stop charging itself, so setting charge on should be
  84          * relatively harmless (as long as it is not done too often).
  85          */
  86 #define CF_BUF_CTRL_BASE 0xF0800000
  87 #define        SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr)))
  88 #define        SCOOP_REG_GPWR    SCOOP_REG(SCOOP_GPWR)
  89
  90         if (on) {
  91                 set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
  92         } else {
  93                 reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
  94         }
  95 #endif
  96 }
  97
  98 static void collie_discharge(int on)
  99 {
 100 }
 101
 102 static void collie_discharge1(int on)
 103 {
 104 }
 105
 106 static void collie_presuspend(void)
 107 {
 108 }
 109
 110 static void collie_postsuspend(void)
 111 {
 112 }
 113
 114 static int collie_should_wakeup(unsigned int resume_on_alarm)
 115 {
 116         return 0;
 117 }
 118
 119 static unsigned long collie_charger_wakeup(void)
 120 {
 121         return 0;
 122 }
 123
 124 int collie_read_backup_battery(void)
 125 {
 126         int voltage;
 127
 128         ucb1x00_adc_enable(ucb);
 129
 130         /* Gives 75..130 */
 131         ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
 132         voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
 133
 134         ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
 135         ucb1x00_adc_disable(ucb);
 136
 137         printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);
 138
 139         return ADCtoPower(voltage);
 140 }
 141
 142 int collie_read_main_battery(void)
 143 {
 144         int voltage, voltage_rev, voltage_volts;
 145
 146         ucb1x00_adc_enable(ucb);
 147         ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
 148         ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);
 149         /* gives values 160..255 with battery removed... and
 150            145..255 with battery inserted. (on AC), goes as low as
 151            80 on DC. */
 152         voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);
 153
 154         ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
 155         ucb1x00_adc_disable(ucb);
 156
 157         voltage_rev = voltage + ((ad_revise * voltage) / 652);
 158         voltage_volts = ADCtoPower(voltage_rev);
 159
 160         printk("Main battery = %d(%d)\n", voltage_volts, voltage);
 161
 162         if (voltage != -1)
 163                 return voltage_volts;
 164         else
 165                 return voltage;
 166 }
 167
 168 int collie_read_temp(void)
 169 {
 170         int voltage;
 171
 172         /* According to Sharp, temp must be > 973, main battery must be < 465,
 173            FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
 174            are way out of range? */
 175
 176         ucb1x00_adc_enable(ucb);
 177         ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
 178         /* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */
 179         voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
 180         ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
 181         ucb1x00_adc_disable(ucb);
 182
 183         printk("Battery temp = %d\n", voltage);
 184         return voltage;
 185 }
 186
 187 static unsigned long read_devdata(int which)
 188 {
 189         switch (which) {
 190         case SHARPSL_BATT_VOLT:
 191                 return collie_read_main_battery();
 192         case SHARPSL_BATT_TEMP:
 193                 return collie_read_temp();
 194         case SHARPSL_ACIN_VOLT:
 195                 return 0x1;
 196         case SHARPSL_STATUS_ACIN: {
 197                 int ret = GPLR & COLLIE_GPIO_AC_IN;
 198                 printk("AC status = %d\n", ret);
 199                 return ret;
 200         }
 201         case SHARPSL_STATUS_FATAL: {
 202                 int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
 203                 printk("Fatal bat = %d\n", ret);
 204                 return ret;
 205         }
 206         default:
 207                 return ~0;
 208         }
 209 }
 210
 211 struct battery_thresh collie_battery_levels[] = {
 212         { 368, 100},
 213         { 358,  25},
 214         { 356,   5},
 215         {   0,   0},
 216 };
 217
 218 struct sharpsl_charger_machinfo collie_pm_machinfo = {
 219         .init             = collie_charger_init,
 220         .read_devdata     = read_devdata,
 221         .discharge        = collie_discharge,
 222         .discharge1       = collie_discharge1,
 223         .charge           = collie_charge,
 224         .measure_temp     = collie_measure_temp,
 225         .presuspend       = collie_presuspend,
 226         .postsuspend      = collie_postsuspend,
 227         .charger_wakeup   = collie_charger_wakeup,
 228         .should_wakeup    = collie_should_wakeup,
 229         .bat_levels       = 3,
 230         .bat_levels_noac  = collie_battery_levels,
 231         .bat_levels_acin  = collie_battery_levels,
 232         .status_high_acin = 368,
 233         .status_low_acin  = 358,
 234         .status_high_noac = 368,
 235         .status_low_noac  = 358,
 236 };
 237
 238 static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
 239 {
 240         sharpsl_pm.machinfo = &collie_pm_machinfo;
 241         ucb = pdev->ucb;
 242         return 0;
 243 }
 244
 245 static struct ucb1x00_driver collie_pm_ucb_driver = {
 246         .add            = collie_pm_ucb_add,
 247 };
 248
 249 static struct platform_device *collie_pm_device;
 250
 251 static int __init collie_pm_init(void)
 252 {
 253         int ret;
 254
 255         collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
 256         if (!collie_pm_device)
 257                 return -ENOMEM;
 258
 259         collie_pm_device->dev.platform_data = &collie_pm_machinfo;
 260         ret = platform_device_add(collie_pm_device);
 261
 262         if (ret)
 263                 platform_device_put(collie_pm_device);
 264
 265         if (!ret)
 266                 ret = ucb1x00_register_driver(&collie_pm_ucb_driver);
 267
 268         return ret;
 269 }
 270
 271 static void __exit collie_pm_exit(void)
 272 {
 273         ucb1x00_unregister_driver(&collie_pm_ucb_driver);
 274         platform_device_unregister(collie_pm_device);
 275 }
 276
 277 module_init(collie_pm_init);
 278 module_exit(collie_pm_exit);