diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/platform/olpc/olpc-xo1-pm.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/platform/olpc/olpc-xo1-pm.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/ANDROID_3.4.5/arch/x86/platform/olpc/olpc-xo1-pm.c b/ANDROID_3.4.5/arch/x86/platform/olpc/olpc-xo1-pm.c deleted file mode 100644 index 0ce8616c..00000000 --- a/ANDROID_3.4.5/arch/x86/platform/olpc/olpc-xo1-pm.c +++ /dev/null @@ -1,216 +0,0 @@ -/* - * Support for power management features of the OLPC XO-1 laptop - * - * Copyright (C) 2010 Andres Salomon <dilinger@queued.net> - * Copyright (C) 2010 One Laptop per Child - * Copyright (C) 2006 Red Hat, Inc. - * Copyright (C) 2006 Advanced Micro Devices, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/cs5535.h> -#include <linux/platform_device.h> -#include <linux/export.h> -#include <linux/pm.h> -#include <linux/mfd/core.h> -#include <linux/suspend.h> - -#include <asm/io.h> -#include <asm/olpc.h> - -#define DRV_NAME "olpc-xo1-pm" - -static unsigned long acpi_base; -static unsigned long pms_base; - -static u16 wakeup_mask = CS5536_PM_PWRBTN; - -static struct { - unsigned long address; - unsigned short segment; -} ofw_bios_entry = { 0xF0000 + PAGE_OFFSET, __KERNEL_CS }; - -/* Set bits in the wakeup mask */ -void olpc_xo1_pm_wakeup_set(u16 value) -{ - wakeup_mask |= value; -} -EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_set); - -/* Clear bits in the wakeup mask */ -void olpc_xo1_pm_wakeup_clear(u16 value) -{ - wakeup_mask &= ~value; -} -EXPORT_SYMBOL_GPL(olpc_xo1_pm_wakeup_clear); - -static int xo1_power_state_enter(suspend_state_t pm_state) -{ - unsigned long saved_sci_mask; - int r; - - /* Only STR is supported */ - if (pm_state != PM_SUSPEND_MEM) - return -EINVAL; - - r = olpc_ec_cmd(EC_SET_SCI_INHIBIT, NULL, 0, NULL, 0); - if (r) - return r; - - /* - * Save SCI mask (this gets lost since PM1_EN is used as a mask for - * wakeup events, which is not necessarily the same event set) - */ - saved_sci_mask = inl(acpi_base + CS5536_PM1_STS); - saved_sci_mask &= 0xffff0000; - - /* Save CPU state */ - do_olpc_suspend_lowlevel(); - - /* Resume path starts here */ - - /* Restore SCI mask (using dword access to CS5536_PM1_EN) */ - outl(saved_sci_mask, acpi_base + CS5536_PM1_STS); - - /* Tell the EC to stop inhibiting SCIs */ - olpc_ec_cmd(EC_SET_SCI_INHIBIT_RELEASE, NULL, 0, NULL, 0); - - /* - * Tell the wireless module to restart USB communication. - * Must be done twice. - */ - olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0); - olpc_ec_cmd(EC_WAKE_UP_WLAN, NULL, 0, NULL, 0); - - return 0; -} - -asmlinkage int xo1_do_sleep(u8 sleep_state) -{ - void *pgd_addr = __va(read_cr3()); - - /* Program wakeup mask (using dword access to CS5536_PM1_EN) */ - outl(wakeup_mask << 16, acpi_base + CS5536_PM1_STS); - - __asm__("movl %0,%%eax" : : "r" (pgd_addr)); - __asm__("call *(%%edi); cld" - : : "D" (&ofw_bios_entry)); - __asm__("movb $0x34, %al\n\t" - "outb %al, $0x70\n\t" - "movb $0x30, %al\n\t" - "outb %al, $0x71\n\t"); - return 0; -} - -static void xo1_power_off(void) -{ - printk(KERN_INFO "OLPC XO-1 power off sequence...\n"); - - /* Enable all of these controls with 0 delay */ - outl(0x40000000, pms_base + CS5536_PM_SCLK); - outl(0x40000000, pms_base + CS5536_PM_IN_SLPCTL); - outl(0x40000000, pms_base + CS5536_PM_WKXD); - outl(0x40000000, pms_base + CS5536_PM_WKD); - - /* Clear status bits (possibly unnecessary) */ - outl(0x0002ffff, pms_base + CS5536_PM_SSC); - outl(0xffffffff, acpi_base + CS5536_PM_GPE0_STS); - - /* Write SLP_EN bit to start the machinery */ - outl(0x00002000, acpi_base + CS5536_PM1_CNT); -} - -static int xo1_power_state_valid(suspend_state_t pm_state) -{ - /* suspend-to-RAM only */ - return pm_state == PM_SUSPEND_MEM; -} - -static const struct platform_suspend_ops xo1_suspend_ops = { - .valid = xo1_power_state_valid, - .enter = xo1_power_state_enter, -}; - -static int __devinit xo1_pm_probe(struct platform_device *pdev) -{ - struct resource *res; - int err; - - /* don't run on non-XOs */ - if (!machine_is_olpc()) - return -ENODEV; - - err = mfd_cell_enable(pdev); - if (err) - return err; - - res = platform_get_resource(pdev, IORESOURCE_IO, 0); - if (!res) { - dev_err(&pdev->dev, "can't fetch device resource info\n"); - return -EIO; - } - if (strcmp(pdev->name, "cs5535-pms") == 0) - pms_base = res->start; - else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0) - acpi_base = res->start; - - /* If we have both addresses, we can override the poweroff hook */ - if (pms_base && acpi_base) { - suspend_set_ops(&xo1_suspend_ops); - pm_power_off = xo1_power_off; - printk(KERN_INFO "OLPC XO-1 support registered\n"); - } - - return 0; -} - -static int __devexit xo1_pm_remove(struct platform_device *pdev) -{ - mfd_cell_disable(pdev); - - if (strcmp(pdev->name, "cs5535-pms") == 0) - pms_base = 0; - else if (strcmp(pdev->name, "olpc-xo1-pm-acpi") == 0) - acpi_base = 0; - - pm_power_off = NULL; - return 0; -} - -static struct platform_driver cs5535_pms_driver = { - .driver = { - .name = "cs5535-pms", - .owner = THIS_MODULE, - }, - .probe = xo1_pm_probe, - .remove = __devexit_p(xo1_pm_remove), -}; - -static struct platform_driver cs5535_acpi_driver = { - .driver = { - .name = "olpc-xo1-pm-acpi", - .owner = THIS_MODULE, - }, - .probe = xo1_pm_probe, - .remove = __devexit_p(xo1_pm_remove), -}; - -static int __init xo1_pm_init(void) -{ - int r; - - r = platform_driver_register(&cs5535_pms_driver); - if (r) - return r; - - r = platform_driver_register(&cs5535_acpi_driver); - if (r) - platform_driver_unregister(&cs5535_pms_driver); - - return r; -} -arch_initcall(xo1_pm_init); |