diff options
Diffstat (limited to 'arch/arm/mach-davinci/id.c')
-rw-r--r-- | arch/arm/mach-davinci/id.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/arch/arm/mach-davinci/id.c b/arch/arm/mach-davinci/id.c deleted file mode 100644 index 018b994..0000000 --- a/arch/arm/mach-davinci/id.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * Davinci CPU identification code - * - * Copyright (C) 2006 Komal Shah <komal_shah802003@yahoo.com> - * - * Derived from OMAP1 CPU identification code. - * - * 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/kernel.h> -#include <linux/init.h> -#include <linux/io.h> - -#define JTAG_ID_BASE IO_ADDRESS(0x01c40028) - -static unsigned int davinci_revision; - -struct davinci_id { - u8 variant; /* JTAG ID bits 31:28 */ - u16 part_no; /* JTAG ID bits 27:12 */ - u32 manufacturer; /* JTAG ID bits 11:1 */ - u32 type; /* Cpu id bits [31:8], cpu class bits [7:0] */ -}; - -/* Register values to detect the DaVinci version */ -static struct davinci_id davinci_ids[] __initdata = { - { - /* DM6446 */ - .part_no = 0xb700, - .variant = 0x0, - .manufacturer = 0x017, - .type = 0x64460000, - }, - { - /* DM646X */ - .part_no = 0xb770, - .variant = 0x0, - .manufacturer = 0x017, - .type = 0x64670000, - }, - { - /* DM355 */ - .part_no = 0xb73b, - .variant = 0x0, - .manufacturer = 0x00f, - .type = 0x03550000, - }, -}; - -/* - * Get Device Part No. from JTAG ID register - */ -static u16 __init davinci_get_part_no(void) -{ - u32 dev_id, part_no; - - dev_id = __raw_readl(JTAG_ID_BASE); - - part_no = ((dev_id >> 12) & 0xffff); - - return part_no; -} - -/* - * Get Device Revision from JTAG ID register - */ -static u8 __init davinci_get_variant(void) -{ - u32 variant; - - variant = __raw_readl(JTAG_ID_BASE); - - variant = (variant >> 28) & 0xf; - - return variant; -} - -unsigned int davinci_rev(void) -{ - return davinci_revision >> 16; -} -EXPORT_SYMBOL(davinci_rev); - -void __init davinci_check_revision(void) -{ - int i; - u16 part_no; - u8 variant; - - part_no = davinci_get_part_no(); - variant = davinci_get_variant(); - - /* First check only the major version in a safe way */ - for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { - if (part_no == (davinci_ids[i].part_no)) { - davinci_revision = davinci_ids[i].type; - break; - } - } - - /* Check if we can find the dev revision */ - for (i = 0; i < ARRAY_SIZE(davinci_ids); i++) { - if (part_no == davinci_ids[i].part_no && - variant == davinci_ids[i].variant) { - davinci_revision = davinci_ids[i].type; - break; - } - } - - printk(KERN_INFO "DaVinci DM%04x variant 0x%x\n", - davinci_rev(), variant); -} |