diff options
Diffstat (limited to 'arch/arm/mach-sa1100/collie_pm.c')
| -rw-r--r-- | arch/arm/mach-sa1100/collie_pm.c | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/arch/arm/mach-sa1100/collie_pm.c b/arch/arm/mach-sa1100/collie_pm.c new file mode 100644 index 000000000000..696d7d29c8a5 --- /dev/null +++ b/arch/arm/mach-sa1100/collie_pm.c @@ -0,0 +1,278 @@ +/* + * Based on spitz_pm.c and sharp code. + * + * Copyright (C) 2001 SHARP + * Copyright 2005 Pavel Machek <pavel@suse.cz> + * + * Distribute under GPLv2. + * + * Li-ion batteries are angry beasts, and they like to explode. This driver is not finished, + * and sometimes charges them when it should not. If it makes angry lithium to come your way... + * ...well, you have been warned. + */ + +#include <linux/module.h> +#include <linux/stat.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/platform_device.h> + +#include <asm/irq.h> +#include <asm/mach-types.h> +#include <asm/hardware.h> +#include <asm/hardware/scoop.h> +#include <asm/dma.h> +#include <asm/arch/collie.h> +#include <asm/mach/sharpsl_param.h> +#include <asm/hardware/sharpsl_pm.h> + +#include "../drivers/mfd/ucb1x00.h" + +static struct ucb1x00 *ucb; +static int ad_revise; + +#define ADCtoPower(x) ((330 * x * 2) / 1024) + +static void collie_charger_init(void) +{ + int err; + + if (sharpsl_param.adadj != -1) { + ad_revise = sharpsl_param.adadj; + } + + /* Register interrupt handler. */ + if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, SA_INTERRUPT, + "ACIN", sharpsl_ac_isr))) { + printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN); + return; + } + if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, SA_INTERRUPT, + "CO", sharpsl_chrg_full_isr))) { + free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr); + printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO); + return; + } + + ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON | + COLLIE_TC35143_GPIO_BBAT_ON); + return; +} + +static void collie_measure_temp(int on) +{ + if (on) + ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0); + else + ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON); +} + +static void collie_charge(int on) +{ + if (on) { + printk("Should start charger\n"); + } else { + printk("Should stop charger\n"); + } +#ifdef I_AM_SURE + + /* Zaurus seems to contain LTC1731 ; it should know when to + * stop charging itself, so setting charge on should be + * relatively harmless (as long as it is not done too often). + */ +#define CF_BUF_CTRL_BASE 0xF0800000 +#define SCOOP_REG(adr) (*(volatile unsigned short*)(CF_BUF_CTRL_BASE+(adr))) +#define SCOOP_REG_GPWR SCOOP_REG(SCOOP_GPWR) + + if (on) { + set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON); + } else { + reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON); + } +#endif +} + +static void collie_discharge(int on) +{ +} + +static void collie_discharge1(int on) +{ +} + +static void collie_presuspend(void) +{ +} + +static void collie_postsuspend(void) +{ +} + +static int collie_should_wakeup(unsigned int resume_on_alarm) +{ + return 0; +} + +static unsigned long collie_charger_wakeup(void) +{ + return 0; +} + +int collie_read_backup_battery(void) +{ + int voltage; + + ucb1x00_adc_enable(ucb); + + /* Gives 75..130 */ + ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0); + voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC); + + ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON); + ucb1x00_adc_disable(ucb); + + printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage); + + return ADCtoPower(voltage); +} + +int collie_read_main_battery(void) +{ + int voltage, voltage_rev, voltage_volts; + + ucb1x00_adc_enable(ucb); + ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON); + ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0); + /* gives values 160..255 with battery removed... and + 145..255 with battery inserted. (on AC), goes as low as + 80 on DC. */ + voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC); + + ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON); + ucb1x00_adc_disable(ucb); + + voltage_rev = voltage + ((ad_revise * voltage) / 652); + voltage_volts = ADCtoPower(voltage_rev); + + printk("Main battery = %d(%d)\n", voltage_volts, voltage); + + if (voltage != -1) + return voltage_volts; + else + return voltage; +} + +int collie_read_temp(void) +{ + int voltage; + + /* According to Sharp, temp must be > 973, main battery must be < 465, + FIXME: sharpsl_pm.c has both conditions negated? FIXME: values + are way out of range? */ + + ucb1x00_adc_enable(ucb); + ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0); + /* >1010 = battery removed, 460 = 22C ?, higer = lower temp ? */ + voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC); + ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON); + ucb1x00_adc_disable(ucb); + + printk("Battery temp = %d\n", voltage); + return voltage; +} + +static unsigned long read_devdata(int which) +{ + switch (which) { + case SHARPSL_BATT_VOLT: + return collie_read_main_battery(); + case SHARPSL_BATT_TEMP: + return collie_read_temp(); + case SHARPSL_ACIN_VOLT: + return 0x1; + case SHARPSL_STATUS_ACIN: { + int ret = GPLR & COLLIE_GPIO_AC_IN; + printk("AC status = %d\n", ret); + return ret; + } + case SHARPSL_STATUS_FATAL: { + int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW; + printk("Fatal bat = %d\n", ret); + return ret; + } + default: + return ~0; + } +} + +struct battery_thresh collie_battery_levels[] = { + { 368, 100}, + { 358, 25}, + { 356, 5}, + { 0, 0}, +}; + +struct sharpsl_charger_machinfo collie_pm_machinfo = { + .init = collie_charger_init, + .read_devdata = read_devdata, + .discharge = collie_discharge, + .discharge1 = collie_discharge1, + .charge = collie_charge, + .measure_temp = collie_measure_temp, + .presuspend = collie_presuspend, + .postsuspend = collie_postsuspend, + .charger_wakeup = collie_charger_wakeup, + .should_wakeup = collie_should_wakeup, + .bat_levels = 3, + .bat_levels_noac = collie_battery_levels, + .bat_levels_acin = collie_battery_levels, + .status_high_acin = 368, + .status_low_acin = 358, + .status_high_noac = 368, + .status_low_noac = 358, +}; + +static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev) +{ + sharpsl_pm.machinfo = &collie_pm_machinfo; + ucb = pdev->ucb; + return 0; +} + +static struct ucb1x00_driver collie_pm_ucb_driver = { + .add = collie_pm_ucb_add, +}; + +static struct platform_device *collie_pm_device; + +static int __init collie_pm_init(void) +{ + int ret; + + collie_pm_device = platform_device_alloc("sharpsl-pm", -1); + if (!collie_pm_device) + return -ENOMEM; + + collie_pm_device->dev.platform_data = &collie_pm_machinfo; + ret = platform_device_add(collie_pm_device); + + if (ret) + platform_device_put(collie_pm_device); + + if (!ret) + ret = ucb1x00_register_driver(&collie_pm_ucb_driver); + + return ret; +} + +static void __exit collie_pm_exit(void) +{ + ucb1x00_unregister_driver(&collie_pm_ucb_driver); + platform_device_unregister(collie_pm_device); +} + +module_init(collie_pm_init); +module_exit(collie_pm_exit); |