[ARM] 3158/1: SharpSL: Add PM device driver for the SL-C7x0 machines.

Patch from Richard Purdie

Add a SharpSL PM device driver for the SL-C7x0 machines.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 228 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/corgi_pm.c b/arch/arm/mach-pxa/corgi_pm.c
new file mode 100644
index 000000000000..599be14754f9
--- /dev/null
+++ b/arch/arm/mach-pxa/corgi_pm.c
@@ -0,0 +1,228 @@
+/*
+ * Battery and Power Management code for the Sharp SL-C7xx
+ *
+ * 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/corgi.h>
+#include <asm/arch/pxa-regs.h>
+#include "sharpsl.h"
+
+static void corgi_charger_init(void)
+{
+        pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
+        pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
+        pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
+        pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
+}
+
+static void corgi_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");
+                GPSR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
+        } else {
+                dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
+                GPCR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
+        }
+}
+
+static void corgi_measure_temp(int on)
+{
+        if (on)
+                GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
+        else
+                GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
+}
+
+static void corgi_charge(int on)
+{
+        if (on) {
+                if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
+                        GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+                        GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+                } else {
+                        GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+                        GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+                }
+        } else {
+                GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+                GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+        }
+}
+
+static void corgi_discharge(int on)
+{
+        if (on)
+                GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
+        else
+                GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
+}
+
+static void corgi_presuspend(void)
+{
+        int i;
+        unsigned long wakeup_mask;
+
+        /* charging , so CHARGE_ON bit is HIGH during OFF. */
+        if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
+                PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
+        else
+                PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
+
+        if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
+                PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
+        else
+                PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
+
+        if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
+                PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
+        else
+                PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
+
+        /* Resume on keyboard power key */
+        PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
+
+        wakeup_mask = GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) | GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_CHRG_FULL);
+
+        if (!machine_is_corgi())
+                wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
+
+        PWER = wakeup_mask | PWER_RTC;
+        PRER = wakeup_mask;
+        PFER = wakeup_mask;
+
+        for (i = 0; i <=15; i++) {
+                if (PRER & PFER & GPIO_bit(i)) {
+                        if (GPLR0 & GPIO_bit(i) )
+                                PRER &= ~GPIO_bit(i);
+                        else
+                                PFER &= ~GPIO_bit(i);
+                }
+        }
+}
+
+static void corgi_postsuspend(void)
+{
+}
+
+/*
+ * Check what brought us out of the suspend.
+ * Return: 0 to sleep, otherwise wake
+ */
+static int corgi_should_wakeup(unsigned int resume_on_alarm)
+{
+        int is_resume = 0;
+
+        dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
+
+        if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
+                if (STATUS_AC_IN()) {
+                        /* charge on */
+                        dev_dbg(sharpsl_pm.dev, "ac insert\n");
+                        sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
+                } else {
+                        /* charge off */
+                        dev_dbg(sharpsl_pm.dev, "ac remove\n");
+                        CHARGE_LED_OFF();
+                        CHARGE_OFF();
+                        sharpsl_pm.charge_mode = CHRG_OFF;
+                }
+        }
+
+        if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
+                dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
+
+        if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
+                is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
+
+        if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
+                is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
+
+        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 corgi_charger_wakeup(void)
+{
+        return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
+}
+
+static int corgi_acin_status(void)
+{
+        return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
+}
+
+static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
+        .init            = corgi_charger_init,
+        .gpio_batlock    = CORGI_GPIO_BAT_COVER,
+        .gpio_acin       = CORGI_GPIO_AC_IN,
+        .gpio_batfull    = CORGI_GPIO_CHRG_FULL,
+        .status_acin     = corgi_acin_status,
+        .discharge       = corgi_discharge,
+        .charge          = corgi_charge,
+        .chargeled       = corgi_charge_led,
+        .measure_temp    = corgi_measure_temp,
+        .presuspend      = corgi_presuspend,
+        .postsuspend     = corgi_postsuspend,
+        .charger_wakeup  = corgi_charger_wakeup,
+        .should_wakeup   = corgi_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 *corgipm_device;
+
+static int __devinit corgipm_init(void)
+{
+        int ret;
+
+        corgipm_device = platform_device_alloc("sharpsl-pm", -1);
+        if (!corgipm_device)
+                return -ENOMEM;
+
+        corgipm_device->dev.platform_data = &corgi_pm_machinfo;
+        ret = platform_device_add(corgipm_device);
+
+        if (ret)
+                platform_device_put(corgipm_device);
+
+        return ret;
+}
+
+static void corgipm_exit(void)
+{
+        platform_device_unregister(corgipm_device);
+}
+
+module_init(corgipm_init);
+module_exit(corgipm_exit);