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-rw-r--r--arch/arm/mach-pxa/spitz_pm.c254
1 files changed, 254 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c
new file mode 100644
index 000000000..6689b67f9
--- /dev/null
+++ b/arch/arm/mach-pxa/spitz_pm.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Battery and Power Management code for the Sharp SL-Cxx00
+ *
+ * Copyright (c) 2005 Richard Purdie
+ */
+
+#include <linux/module.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/gpio-pxa.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/apm-emulation.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include "spitz.h"
+#include "pxa27x.h"
+#include "sharpsl_pm.h"
+
+#include "generic.h"
+
+#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
+#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
+#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
+#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
+#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
+#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
+
+static int spitz_last_ac_status;
+
+static struct gpio spitz_charger_gpios[] = {
+ { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
+ { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
+ { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
+ { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
+ { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
+ { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
+};
+
+static void spitz_charger_init(void)
+{
+ gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
+}
+
+static void spitz_measure_temp(int on)
+{
+ gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
+}
+
+static void spitz_charge(int on)
+{
+ if (on) {
+ if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
+ gpio_set_value(SPITZ_GPIO_JK_B, 1);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+ } else {
+ gpio_set_value(SPITZ_GPIO_JK_B, 0);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+ }
+ } else {
+ gpio_set_value(SPITZ_GPIO_JK_B, 0);
+ gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
+ }
+}
+
+static void spitz_discharge(int on)
+{
+ gpio_set_value(SPITZ_GPIO_JK_A, on);
+}
+
+/* HACK - For unknown reasons, accurate voltage readings are only made with a load
+ on the power bus which the green led on spitz provides */
+static void spitz_discharge1(int on)
+{
+ gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
+}
+
+static unsigned long gpio18_config = GPIO18_GPIO;
+
+static void spitz_presuspend(void)
+{
+ spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+
+ /* GPIO Sleep Register */
+ PGSR0 = 0x00144018;
+ PGSR1 = 0x00EF0000;
+ if (machine_is_akita()) {
+ PGSR2 = 0x2121C000;
+ PGSR3 = 0x00600400;
+ } else {
+ PGSR2 = 0x0121C000;
+ PGSR3 = 0x00600000;
+ }
+
+ PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
+ PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
+ PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
+ PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
+ PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
+
+ pxa2xx_mfp_config(&gpio18_config, 1);
+ gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
+ gpio_free(18);
+
+ PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
+ PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
+ PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
+ PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
+ PKSR = 0xffffffff; /* clear */
+
+ /* nRESET_OUT Disable */
+ PSLR |= PSLR_SL_ROD;
+
+ /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
+ PCFR = PCFR_GPR_EN | PCFR_OPDE;
+}
+
+static void spitz_postsuspend(void)
+{
+}
+
+static int spitz_should_wakeup(unsigned int resume_on_alarm)
+{
+ int is_resume = 0;
+ int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+
+ if (spitz_last_ac_status != acin) {
+ if (acin) {
+ /* charge on */
+ sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
+ dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
+ } else {
+ /* charge off */
+ dev_dbg(sharpsl_pm.dev, "AC Removed\n");
+ sharpsl_pm_led(SHARPSL_LED_OFF);
+ sharpsl_pm.machinfo->charge(0);
+ sharpsl_pm.charge_mode = CHRG_OFF;
+ }
+ spitz_last_ac_status = acin;
+ /* Return to suspend as this must be what we were woken for */
+ return 0;
+ }
+
+ if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
+ is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
+
+ if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
+ is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
+
+ if (resume_on_alarm && (PEDR & PWER_RTC))
+ is_resume |= PWER_RTC;
+
+ dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
+ return is_resume;
+}
+
+static bool spitz_charger_wakeup(void)
+{
+ return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
+ gpio_get_value(SPITZ_GPIO_SYNC);
+}
+
+unsigned long spitzpm_read_devdata(int type)
+{
+ switch (type) {
+ case SHARPSL_STATUS_ACIN:
+ return !gpio_get_value(SPITZ_GPIO_AC_IN);
+ case SHARPSL_STATUS_LOCK:
+ return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
+ case SHARPSL_STATUS_CHRGFULL:
+ return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
+ case SHARPSL_STATUS_FATAL:
+ return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
+ case SHARPSL_ACIN_VOLT:
+ return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
+ case SHARPSL_BATT_TEMP:
+ return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
+ case SHARPSL_BATT_VOLT:
+ default:
+ return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
+ }
+}
+
+struct sharpsl_charger_machinfo spitz_pm_machinfo = {
+ .init = spitz_charger_init,
+ .exit = NULL,
+ .gpio_batlock = SPITZ_GPIO_BAT_COVER,
+ .gpio_acin = SPITZ_GPIO_AC_IN,
+ .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
+ .batfull_irq = 1,
+ .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
+ .discharge = spitz_discharge,
+ .discharge1 = spitz_discharge1,
+ .charge = spitz_charge,
+ .measure_temp = spitz_measure_temp,
+ .presuspend = spitz_presuspend,
+ .postsuspend = spitz_postsuspend,
+ .read_devdata = spitzpm_read_devdata,
+ .charger_wakeup = spitz_charger_wakeup,
+ .should_wakeup = spitz_should_wakeup,
+#if defined(CONFIG_LCD_CORGI)
+ .backlight_limit = corgi_lcd_limit_intensity,
+#endif
+ .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
+ .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
+ .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
+ .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
+ .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
+ .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
+ .bat_levels = 40,
+ .bat_levels_noac = sharpsl_battery_levels_noac,
+ .bat_levels_acin = sharpsl_battery_levels_acin,
+ .status_high_acin = 188,
+ .status_low_acin = 178,
+ .status_high_noac = 185,
+ .status_low_noac = 175,
+};
+
+static struct platform_device *spitzpm_device;
+
+static int spitzpm_init(void)
+{
+ int ret;
+
+ if (!machine_is_spitz() && !machine_is_akita()
+ && !machine_is_borzoi())
+ return -ENODEV;
+
+ spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
+ if (!spitzpm_device)
+ return -ENOMEM;
+
+ spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
+ ret = platform_device_add(spitzpm_device);
+
+ if (ret)
+ platform_device_put(spitzpm_device);
+
+ return ret;
+}
+
+static void spitzpm_exit(void)
+{
+ platform_device_unregister(spitzpm_device);
+}
+
+module_init(spitzpm_init);
+module_exit(spitzpm_exit);