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/********************************************************************************
* File Name : linux/arch/arm/plat-aspeed/dev-lpc.c
* Author : Ryan chen
* Description : ASPEED LPC Controller
*
* Copyright (C) ASPEED Technology 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.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* History :
* 1. 2012/11/29 ryan chen create this file
*
********************************************************************************/
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <mach/irqs.h>
#include <mach/platform.h>
#include <plat/devs.h>
#include <plat/ast-scu.h>
#include <plat/regs-lpc.h>
static u32 ast_lpc_base = IO_ADDRESS(AST_LPC_BASE);
/* --------------------------------------------------------------------
* LPC
* -------------------------------------------------------------------- */
#if defined(CONFIG_LPC) || defined(CONFIG_LPC_MODULE)
static struct resource ast_lpc_resource[] = {
[0] = {
.start = AST_LPC_BASE,
.end = AST_LPC_BASE + SZ_4K,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_LPC,
.end = IRQ_LPC,
.flags = IORESOURCE_IRQ,
},
};
static u64 ast_lpc_dma_mask = 0xffffffffUL;
static struct platform_device ast_lpc_device = {
.name = "ast_lpc",
.id = 0,
.dev = {
.dma_mask = &ast_lpc_dma_mask,
.coherent_dma_mask = 0xffffffff,
},
.resource = ast_lpc_resource,
.num_resources = ARRAY_SIZE(ast_lpc_resource),
};
static struct resource ast_lpc_plus_resource[] = {
[0] = {
.start = AST_LPC_PLUS_BASE,
.end = AST_LPC_PLUS_BASE + SZ_4K,
.flags = IORESOURCE_MEM,
},
};
static struct platform_device ast_lpc_plus_device = {
.name = "ast_lpc_plus",
.id = 1,
.dev = {
.dma_mask = &ast_lpc_dma_mask,
.coherent_dma_mask = 0xffffffff,
},
.resource = ast_lpc_plus_resource,
.num_resources = ARRAY_SIZE(ast_lpc_plus_resource),
};
void __init ast_add_device_lpc(void)
{
// it should enable at u-boot
// ast_scu_init_lpc();
platform_device_register(&ast_lpc_device);
platform_device_register(&ast_lpc_plus_device);
}
#else
void __init ast_add_device_lpc(void) {
// Since we disable LPC, bring the UART1 and UART2 out from LPC control
writel((readl(ast_lpc_base + AST_LPC_HICR9)
& ~(LPC_HICR9_SOURCE_UART1|LPC_HICR9_SOURCE_UART2
|LPC_HICR9_SOURCE_UART3|LPC_HICR9_SOURCE_UART4)),
ast_lpc_base + AST_LPC_HICR9);
}
#endif
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