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https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
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e9add2eeb1
Cell uses the same code as pSeries for flashing the firmware through rtas, so the implementation should not be part of platforms/pseries. Put it into arch/powerpc/kernel instead. Signed-off-by: Arnd Bergmann <arndb@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
136 lines
3.9 KiB
C
136 lines
3.9 KiB
C
/*
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*
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* Procedures for firmware flash updates.
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*
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* Peter Bergner, IBM March 2001.
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* Copyright (C) 2001 IBM.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <stdarg.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <asm/prom.h>
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#include <asm/rtas.h>
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#include <asm/semaphore.h>
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#include <asm/machdep.h>
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#include <asm/page.h>
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#include <asm/param.h>
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#include <asm/system.h>
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#include <asm/abs_addr.h>
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#include <asm/udbg.h>
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#include <asm/delay.h>
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#include <asm/uaccess.h>
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#include <asm/systemcfg.h>
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struct flash_block_list_header rtas_firmware_flash_list = {0, NULL};
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#define FLASH_BLOCK_LIST_VERSION (1UL)
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static void rtas_flash_firmware(void)
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{
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unsigned long image_size;
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struct flash_block_list *f, *next, *flist;
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unsigned long rtas_block_list;
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int i, status, update_token;
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update_token = rtas_token("ibm,update-flash-64-and-reboot");
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if (update_token == RTAS_UNKNOWN_SERVICE) {
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printk(KERN_ALERT "FLASH: ibm,update-flash-64-and-reboot is not available -- not a service partition?\n");
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printk(KERN_ALERT "FLASH: firmware will not be flashed\n");
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return;
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}
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/* NOTE: the "first" block list is a global var with no data
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* blocks in the kernel data segment. We do this because
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* we want to ensure this block_list addr is under 4GB.
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*/
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rtas_firmware_flash_list.num_blocks = 0;
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flist = (struct flash_block_list *)&rtas_firmware_flash_list;
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rtas_block_list = virt_to_abs(flist);
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if (rtas_block_list >= 4UL*1024*1024*1024) {
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printk(KERN_ALERT "FLASH: kernel bug...flash list header addr above 4GB\n");
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return;
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}
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printk(KERN_ALERT "FLASH: preparing saved firmware image for flash\n");
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/* Update the block_list in place. */
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image_size = 0;
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for (f = flist; f; f = next) {
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/* Translate data addrs to absolute */
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for (i = 0; i < f->num_blocks; i++) {
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f->blocks[i].data = (char *)virt_to_abs(f->blocks[i].data);
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image_size += f->blocks[i].length;
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}
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next = f->next;
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/* Don't translate NULL pointer for last entry */
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if (f->next)
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f->next = (struct flash_block_list *)virt_to_abs(f->next);
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else
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f->next = NULL;
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/* make num_blocks into the version/length field */
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f->num_blocks = (FLASH_BLOCK_LIST_VERSION << 56) | ((f->num_blocks+1)*16);
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}
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printk(KERN_ALERT "FLASH: flash image is %ld bytes\n", image_size);
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printk(KERN_ALERT "FLASH: performing flash and reboot\n");
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rtas_progress("Flashing \n", 0x0);
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rtas_progress("Please Wait... ", 0x0);
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printk(KERN_ALERT "FLASH: this will take several minutes. Do not power off!\n");
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status = rtas_call(update_token, 1, 1, NULL, rtas_block_list);
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switch (status) { /* should only get "bad" status */
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case 0:
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printk(KERN_ALERT "FLASH: success\n");
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break;
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case -1:
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printk(KERN_ALERT "FLASH: hardware error. Firmware may not be not flashed\n");
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break;
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case -3:
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printk(KERN_ALERT "FLASH: image is corrupt or not correct for this platform. Firmware not flashed\n");
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break;
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case -4:
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printk(KERN_ALERT "FLASH: flash failed when partially complete. System may not reboot\n");
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break;
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default:
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printk(KERN_ALERT "FLASH: unknown flash return code %d\n", status);
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break;
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}
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}
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void rtas_flash_bypass_warning(void)
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{
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printk(KERN_ALERT "FLASH: firmware flash requires a reboot\n");
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printk(KERN_ALERT "FLASH: the firmware image will NOT be flashed\n");
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}
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void rtas_fw_restart(char *cmd)
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{
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if (rtas_firmware_flash_list.next)
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rtas_flash_firmware();
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rtas_restart(cmd);
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}
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void rtas_fw_power_off(void)
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{
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if (rtas_firmware_flash_list.next)
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rtas_flash_bypass_warning();
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rtas_power_off();
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}
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void rtas_fw_halt(void)
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{
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if (rtas_firmware_flash_list.next)
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rtas_flash_bypass_warning();
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rtas_halt();
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}
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EXPORT_SYMBOL(rtas_firmware_flash_list);
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