[ARM] 3159/1: SharpSL: Add PM device driver for the SL-Cx00 machines.
Patch from Richard Purdie
Add a SharpSL PM device driver for the SL-Cxx00 machines.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c
new file mode 100644
index 0000000..3ce7486
--- /dev/null
+++ b/arch/arm/mach-pxa/spitz_pm.c
@@ -0,0 +1,233 @@
+/*
+ * Battery and Power Management code for the Sharp SL-Cxx00
+ *
+ * Copyright (c) 2005 Richard Purdie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#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/platform_device.h>
+#include <asm/apm.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+#include <asm/hardware.h>
+#include <asm/hardware/scoop.h>
+
+#include <asm/arch/sharpsl.h>
+#include <asm/arch/spitz.h>
+#include <asm/arch/pxa-regs.h>
+#include "sharpsl.h"
+
+static int spitz_last_ac_status;
+
+static void spitz_charger_init(void)
+{
+ pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
+ pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
+}
+
+static void spitz_charge_led(int val)
+{
+ if (val == SHARPSL_LED_ERROR) {
+ dev_dbg(sharpsl_pm.dev, "Charge LED Error\n");
+ } else if (val == SHARPSL_LED_ON) {
+ dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_ORANGE);
+ } else {
+ dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_ORANGE);
+ }
+}
+
+static void spitz_measure_temp(int on)
+{
+ if (on)
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
+ else
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
+}
+
+static void spitz_charge(int on)
+{
+ if (on) {
+ if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
+ } else {
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
+ }
+ } else {
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
+ }
+}
+
+static void spitz_discharge(int on)
+{
+ if (on)
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
+ else
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
+}
+
+/* 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)
+{
+ if (on)
+ set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
+ else
+ reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
+}
+
+static void spitz_presuspend(void)
+{
+ spitz_last_ac_status = STATUS_AC_IN();
+
+ /* 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);
+
+ pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
+
+ 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;
+
+ /* Clear reset status */
+ RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
+
+ /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
+ PCFR = PCFR_GPR_EN | PCFR_OPDE;
+}
+
+static void spitz_postsuspend(void)
+{
+ pxa_gpio_mode(GPIO18_RDY_MD);
+ pxa_gpio_mode(10 | GPIO_IN);
+}
+
+static int spitz_should_wakeup(unsigned int resume_on_alarm)
+{
+ int is_resume = 0;
+ int acin = STATUS_AC_IN();
+
+ 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");
+ CHARGE_LED_OFF();
+ CHARGE_OFF();
+ 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 unsigned long spitz_charger_wakeup(void)
+{
+ return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
+}
+
+static int spitz_acin_status(void)
+{
+ return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
+}
+
+struct sharpsl_charger_machinfo spitz_pm_machinfo = {
+ .init = spitz_charger_init,
+ .gpio_batlock = SPITZ_GPIO_BAT_COVER,
+ .gpio_acin = SPITZ_GPIO_AC_IN,
+ .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
+ .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
+ .status_acin = spitz_acin_status,
+ .discharge = spitz_discharge,
+ .discharge1 = spitz_discharge1,
+ .charge = spitz_charge,
+ .chargeled = spitz_charge_led,
+ .measure_temp = spitz_measure_temp,
+ .presuspend = spitz_presuspend,
+ .postsuspend = spitz_postsuspend,
+ .charger_wakeup = spitz_charger_wakeup,
+ .should_wakeup = spitz_should_wakeup,
+ .bat_levels = 40,
+ .bat_levels_noac = spitz_battery_levels_noac,
+ .bat_levels_acin = spitz_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 __devinit spitzpm_init(void)
+{
+ int ret;
+
+ 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);