diff options
Diffstat (limited to 'arch/arm/mach-aspeed/ast-lpc_plus.c')
| -rw-r--r-- | arch/arm/mach-aspeed/ast-lpc_plus.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/arch/arm/mach-aspeed/ast-lpc_plus.c b/arch/arm/mach-aspeed/ast-lpc_plus.c new file mode 100644 index 0000000..187b8b8 --- /dev/null +++ b/arch/arm/mach-aspeed/ast-lpc_plus.c @@ -0,0 +1,182 @@ +/******************************************************************************** +* File Name : arch/arm/mach-aspeed/ast-lpc_plus.c +* Author : Ryan Chen +* Description : AST LPC +* +* Copyright (C) 2012-2020 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. 2013/05/15 Ryan Chen Create +* +********************************************************************************/ +#include <linux/platform_device.h> +#include <linux/slab.h> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/delay.h> + +#include <mach/platform.h> +#include <asm/io.h> +#include <linux/interrupt.h> + +#include <mach/hardware.h> + +#include <plat/regs-lpc.h> +#include <plat/ast-snoop.h> +#include <plat/ast-lpc.h> +#ifdef CONFIG_ARCH_AST1070 +#include <plat/ast1070-scu.h> +#include <plat/ast1070-devs.h> +#include <plat/regs-ast1070-intc.h> +#include <plat/ast1070-uart-dma.h> +#endif + +//#define AST_LPCP_DEBUG + +#ifdef AST_LPCP_DEBUG +#define LPCP_DBUG(fmt, args...) printk("%s() " fmt, __FUNCTION__, ## args) +#else +#define LPCP_DBUG(fmt, args...) +#endif + +#if 0 +static inline u32 +ast_lpc_plus_write(u32 reg) +{ + u32 val; + + val = readl(ast_lpc_base + reg); + + LPCDBUG("ast_lpc_read : reg = 0x%08x, val = 0x%08x\n", reg, val); + + return val; +} + +static inline void +ast_lpc_plus_write(u32 val, u32 reg) +{ + LPCDBUG("ast_lpc_write : reg = 0x%08x, val = 0x%08x\n", reg, val); + writel(val, ast_lpc_base + reg); +} +#endif + +static int __devinit ast_lpc_plus_probe(struct platform_device *pdev) +{ + static struct ast_lpc_driver_data *lpc_plus_driver_data; +// const struct platform_device_id *id = platform_get_device_id(pdev); + struct resource *res; + int ret = 0; + int i; + + lpc_plus_driver_data = kzalloc(sizeof(struct ast_lpc_driver_data), GFP_KERNEL); + if (lpc_plus_driver_data == NULL) { + dev_err(&pdev->dev, "failed to allocate memory\n"); + return -ENOMEM; + } + + lpc_plus_driver_data->pdev = pdev; + + lpc_plus_driver_data->bus_info = pdev->dev.platform_data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (res == NULL) { + dev_err(&pdev->dev, "no memory resource defined\n"); + ret = -ENODEV; + goto err_free; + } + + res = request_mem_region(res->start, resource_size(res), pdev->name); + if (res == NULL) { + dev_err(&pdev->dev, "failed to request memory resource\n"); + ret = -EBUSY; + goto err_free; + } + + lpc_plus_driver_data->reg_base = ioremap(res->start, resource_size(res)); + if (lpc_plus_driver_data->reg_base == NULL) { + dev_err(&pdev->dev, "failed to ioremap() registers\n"); + ret = -ENODEV; + goto err_free_mem; + } + +#ifdef CONFIG_ARCH_AST1070 + if(lpc_plus_driver_data->bus_info->bus_scan) { + printk("LPC PLUS Scan Device... "); + for(i=0;i<lpc_plus_driver_data->bus_info->scan_node;i++) { + ast1070_scu_init(i ,lpc_plus_driver_data->bus_info->bridge_phy_addr + i*0x10000); + printk("C%d-[%x] ", i, ast1070_revision_id_info(i)); + ast1070_vic_init(i, (lpc_plus_driver_data->bus_info->bridge_phy_addr + i*0x10000), IRQ_C0_VIC_CHAIN + i, IRQ_C0_VIC_CHAIN_START + (i*AST_CVIC_NUM)); + ast1070_scu_dma_init(i); + ast1070_uart_dma_init(i, lpc_plus_driver_data->bus_info->bridge_phy_addr); + ast_add_device_cuart(i,lpc_plus_driver_data->bus_info->bridge_phy_addr + i*0x10000); + ast_add_device_ci2c(i,lpc_plus_driver_data->bus_info->bridge_phy_addr + i*0x10000); + } + printk("\n"); + + } + +#endif + + platform_set_drvdata(pdev, lpc_plus_driver_data); + return 0; + +err_free_mem: + release_mem_region(res->start, resource_size(res)); +err_free: + kfree(lpc_plus_driver_data); + + return ret; +} + +static int __devexit ast_lpc_plus_remove(struct platform_device *pdev) +{ + struct ast_lpc_driver_data *lpc_plus_driver_data; + struct resource *res; + + lpc_plus_driver_data = platform_get_drvdata(pdev); + if (lpc_plus_driver_data == NULL) + return -ENODEV; + + iounmap(lpc_plus_driver_data->reg_base); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + kfree(lpc_plus_driver_data); + + return 0; +} + +static struct platform_driver ast_lpc_plus_driver = { + .driver = { + .name = "ast_lpc_plus", + .owner = THIS_MODULE, + }, + .probe = ast_lpc_plus_probe, + .remove = __devexit_p(ast_lpc_plus_remove), +// .id_table = pwm_id_table, +}; + +static int __init ast_lpc_plus_init(void) +{ + return platform_driver_register(&ast_lpc_plus_driver); +} +arch_initcall(ast_lpc_plus_init); + +static void __exit ast_lpc_plus_exit(void) +{ + platform_driver_unregister(&ast_lpc_plus_driver); +} +module_exit(ast_lpc_plus_exit); + +MODULE_LICENSE("GPL v2"); |
