From patchwork Fri Oct 13 20:59:15 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dave Gerlach X-Patchwork-Id: 115830 Delivered-To: patch@linaro.org Received: by 10.140.22.163 with SMTP id 32csp1151873qgn; Fri, 13 Oct 2017 14:00:27 -0700 (PDT) X-Google-Smtp-Source: AOwi7QAynMDKacEbPhKj1W1/PHuw+uDn2AG71T9+gzW/8huXW52uCXWr+ilHnSYnuwQ+SH0WFHT/ X-Received: by 10.98.141.89 with SMTP id z86mr2320101pfd.207.1507928427572; Fri, 13 Oct 2017 14:00:27 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1507928427; cv=none; d=google.com; s=arc-20160816; b=nJDZoDJ+i4SFKimKLi1pteqbGfZyymqZj/DTShywzUfLHF7e76+v05G1vddBPK6GQk 4nX14lpVWeKGWujJ4xnhP1GmyI0/gCX1Kx18OW/L7DyhlPZx0+izj1GX7Egz9AAVpIXn MN3nRbJYIPyJ4BwOjOAiN/TatIs2qGRkCbtqiYamELJRKU/6DcU48iotAihKxYbdYdxT AoOpTiYcZ4dG+gAs47fRcj2o5myeLSFQeM/zl8yN03m9iWr2sebqafFTt0FuWT/qbauF u1+DyIEoFwnudLDPLWuLCFbaQpxaWcjOLvwtzgbHnx7yArgYIyI9qiPL/bum2TiTYFbg Dt7g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature :arc-authentication-results; bh=dDynYifTRn2I6jssPDTG9N2G1Xe/QBzSi3eHQvjGc1o=; b=O7jmnojK9/k3+O5obIdMOZxU2cHGHrYwxWYn9Ps/eNU293txMdriJeWNeBAZMu4zMk ycTqvWduzhrhwr3IUiGjf8vNp1L0X+zOQb2So88qwZTw2gb9L13d5Dp8SnO2n7zGlyL6 oE0jQnwsQtbVa9RYP+UHuKH5nBCtGbGP3awluLanDoM9fcdPzu6Ncttd8n+mWMPPXQ9C c2hGF7A2w4UCg4WRzMolhKuMTHDdI5EQSvROom8vgOllD9ao6Fnt6e3dVNDWE5LD4t9X oyTHzZZvdW7lZk6534SpHyey2njB1B4zi1u5RfScnkAgI59n+u993d7pkOzZvfi7v/xV VErg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=VVzsMUSb; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c41si1087246plj.679.2017.10.13.14.00.27; Fri, 13 Oct 2017 14:00:27 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@ti.com header.s=ti-com-17Q1 header.b=VVzsMUSb; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=NONE dis=NONE) header.from=ti.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752729AbdJMVA0 (ORCPT + 27 others); Fri, 13 Oct 2017 17:00:26 -0400 Received: from lelnx193.ext.ti.com ([198.47.27.77]:42863 "EHLO lelnx193.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751516AbdJMVAX (ORCPT ); Fri, 13 Oct 2017 17:00:23 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by lelnx193.ext.ti.com (8.15.1/8.15.1) with ESMTP id v9DKxLcw027000; Fri, 13 Oct 2017 15:59:21 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ti.com; s=ti-com-17Q1; t=1507928361; bh=HJbCRZ5gJyYNkYTLYpRi1NW3oVTSTCKKpbWjFgvJ9WU=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=VVzsMUSbSzpFf1fh78biIbTK5+stSx5F/HrbvW1cHp6RKF0Ld0u83Fm3BBgfaYf3s GBCRxD+O4nEyefkiGWZ/Y8Jko825z9plkGGqApgltjXC296ZGmWsyKlfQA4xNDGI4m R4aJb7Da+X079PZ05KNo/H2HODTMjeC8T5KFYSb4= Received: from DLEE102.ent.ti.com (dlee102.ent.ti.com [157.170.170.32]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id v9DKxLoC010025; Fri, 13 Oct 2017 15:59:21 -0500 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.1.845.34; Fri, 13 Oct 2017 15:59:21 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.845.34 via Frontend Transport; Fri, 13 Oct 2017 15:59:21 -0500 Received: from legion.dal.design.ti.com (legion.dal.design.ti.com [128.247.22.53]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id v9DKxLM0021786; Fri, 13 Oct 2017 15:59:21 -0500 Received: from localhost (uda0274052.dhcp.ti.com [128.247.59.203]) by legion.dal.design.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id v9DKxL317961; Fri, 13 Oct 2017 15:59:21 -0500 (CDT) From: Dave Gerlach To: Tony Lindgren , Santosh Shilimkar , Russell King CC: , , , , Rob Herring , Dave Gerlach , Keerthy J , Johan Hovold Subject: [PATCH v5 2/2] memory: ti-emif-sram: introduce relocatable suspend/resume handlers Date: Fri, 13 Oct 2017 15:59:15 -0500 Message-ID: <20171013205915.9652-3-d-gerlach@ti.com> X-Mailer: git-send-email 2.13.4 In-Reply-To: <20171013205915.9652-1-d-gerlach@ti.com> References: <20171013205915.9652-1-d-gerlach@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Certain SoCs like Texas Instruments AM335x and AM437x require parts of the EMIF PM code to run late in the suspend sequence from SRAM, such as saving and restoring the EMIF context and placing the memory into self-refresh. One requirement for these SoCs to suspend and enter its lowest power mode, called DeepSleep0, is that the PER power domain must be shut off. Because the EMIF (DDR Controller) resides within this power domain, it will lose context during a suspend operation, so we must save it so we can restore once we resume. However, we cannot execute this code from external memory, as it is not available at this point, so the code must be executed late in the suspend path from SRAM. This patch introduces a ti-emif-sram driver that includes several functions written in ARM ASM that are relocatable so the PM SRAM code can use them. It also allocates a region of writable SRAM to be used by the code running in the executable region of SRAM to save and restore the EMIF context. It can export a table containing the absolute addresses of the available PM functions so that other SRAM code can branch to them. This code is required for suspend/resume on AM335x and AM437x to work. In addition to this, to be able to share data structures between C and the ti-emif-sram-pm assembly code, we can automatically generate all of the C struct member offsets and sizes as macros by processing emif-asm-offsets.c into assembly code and then extracting the relevant data as is done for the generated platform asm-offsets.h files. Signed-off-by: Dave Gerlach --- v4->v5: * Simplify Makefile to generate include/generated/ti-emif-asm-offsets.h drivers/memory/Kconfig | 10 ++ drivers/memory/Makefile | 13 ++ drivers/memory/emif-asm-offsets.c | 22 +++ drivers/memory/emif.h | 17 ++ drivers/memory/ti-emif-pm.c | 339 ++++++++++++++++++++++++++++++++++++++ drivers/memory/ti-emif-sram-pm.S | 334 +++++++++++++++++++++++++++++++++++++ include/linux/ti-emif-sram.h | 144 ++++++++++++++++ 7 files changed, 879 insertions(+) create mode 100644 drivers/memory/emif-asm-offsets.c create mode 100644 drivers/memory/ti-emif-pm.c create mode 100644 drivers/memory/ti-emif-sram-pm.S create mode 100644 include/linux/ti-emif-sram.h -- 2.13.4 diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index ffc350258041..19a0e83f260d 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -84,6 +84,16 @@ config OMAP_GPMC_DEBUG bootloader or else the GPMC timings won't be identical with the bootloader timings. +config TI_EMIF_SRAM + tristate "Texas Instruments EMIF SRAM driver" + depends on (SOC_AM33XX || SOC_AM43XX) && SRAM + help + This driver is for the EMIF module available on Texas Instruments + AM33XX and AM43XX SoCs and is required for PM. Certain parts of + the EMIF PM code must run from on-chip SRAM late in the suspend + sequence so this driver provides several relocatable PM functions + for the SoC PM code to use. + config MVEBU_DEVBUS bool "Marvell EBU Device Bus Controller" default y diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index e88097fbc085..a26f1c1ba0bb 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -21,3 +21,16 @@ obj-$(CONFIG_DA8XX_DDRCTL) += da8xx-ddrctl.o obj-$(CONFIG_SAMSUNG_MC) += samsung/ obj-$(CONFIG_TEGRA_MC) += tegra/ +obj-$(CONFIG_TI_EMIF_SRAM) += ti-emif-sram.o +ti-emif-sram-objs := ti-emif-pm.o ti-emif-sram-pm.o + +AFLAGS_ti-emif-sram-pm.o :=-Wa,-march=armv7-a + +# Generate offset macros for use in ASM code +drivers/memory/emif-asm-offsets.s: drivers/memory/emif-asm-offsets.c + $(call if_changed_dep,cc_s_c) + +include/generated/ti-emif-asm-offsets.h: drivers/memory/emif-asm-offsets.s FORCE + $(call filechk,offsets,__TI_EMIF_ASM_OFFSETS_H__) + +drivers/memory/ti-emif-sram-pm.o: include/generated/ti-emif-asm-offsets.h diff --git a/drivers/memory/emif-asm-offsets.c b/drivers/memory/emif-asm-offsets.c new file mode 100644 index 000000000000..bdb153c9e948 --- /dev/null +++ b/drivers/memory/emif-asm-offsets.c @@ -0,0 +1,22 @@ +/* + * TI AM33XX EMIF PM Assembly Offsets + * + * Copyright (C) 2016-2017 Texas Instruments 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include + +int main(void) +{ + ti_emif_offsets(); + + return 0; +} diff --git a/drivers/memory/emif.h b/drivers/memory/emif.h index bfe08bae961a..9e9f8037955d 100644 --- a/drivers/memory/emif.h +++ b/drivers/memory/emif.h @@ -555,6 +555,9 @@ #define READ_LATENCY_SHDW_SHIFT 0 #define READ_LATENCY_SHDW_MASK (0x1f << 0) +#define EMIF_SRAM_AM33_REG_LAYOUT 0x00000000 +#define EMIF_SRAM_AM43_REG_LAYOUT 0x00000001 + #ifndef __ASSEMBLY__ /* * Structure containing shadow of important registers in EMIF @@ -585,5 +588,19 @@ struct emif_regs { u32 ext_phy_ctrl_3_shdw; u32 ext_phy_ctrl_4_shdw; }; + +struct ti_emif_pm_functions; + +extern unsigned int ti_emif_sram; +extern unsigned int ti_emif_sram_sz; +extern struct ti_emif_pm_data ti_emif_pm_sram_data; +extern struct emif_regs_amx3 ti_emif_regs_amx3; + +void ti_emif_save_context(void); +void ti_emif_restore_context(void); +void ti_emif_enter_sr(void); +void ti_emif_exit_sr(void); +void ti_emif_abort_sr(void); + #endif /* __ASSEMBLY__ */ #endif /* __EMIF_H */ diff --git a/drivers/memory/ti-emif-pm.c b/drivers/memory/ti-emif-pm.c new file mode 100644 index 000000000000..0054e788d948 --- /dev/null +++ b/drivers/memory/ti-emif-pm.c @@ -0,0 +1,339 @@ +/* + * TI AM33XX SRAM EMIF Driver + * + * Copyright (C) 2016-2017 Texas Instruments Inc. + * Dave Gerlach + * + * 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. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "emif.h" + +#define TI_EMIF_SRAM_SYMBOL_OFFSET(sym) ((unsigned long)(sym) - \ + (unsigned long)&ti_emif_sram) + +#define EMIF_POWER_MGMT_WAIT_SELF_REFRESH_8192_CYCLES 0x00a0 + +struct ti_emif_data { + phys_addr_t ti_emif_sram_phys; + phys_addr_t ti_emif_sram_data_phys; + unsigned long ti_emif_sram_virt; + unsigned long ti_emif_sram_data_virt; + struct gen_pool *sram_pool_code; + struct gen_pool *sram_pool_data; + struct ti_emif_pm_data pm_data; + struct ti_emif_pm_functions pm_functions; +}; + +static struct ti_emif_data *emif_instance; + +static u32 sram_suspend_address(struct ti_emif_data *emif_data, + unsigned long addr) +{ + return (emif_data->ti_emif_sram_virt + + TI_EMIF_SRAM_SYMBOL_OFFSET(addr)); +} + +static phys_addr_t sram_resume_address(struct ti_emif_data *emif_data, + unsigned long addr) +{ + return ((unsigned long)emif_data->ti_emif_sram_phys + + TI_EMIF_SRAM_SYMBOL_OFFSET(addr)); +} + +static void ti_emif_free_sram(struct ti_emif_data *emif_data) +{ + gen_pool_free(emif_data->sram_pool_code, emif_data->ti_emif_sram_virt, + ti_emif_sram_sz); + gen_pool_free(emif_data->sram_pool_data, + emif_data->ti_emif_sram_data_virt, + sizeof(struct emif_regs_amx3)); +} + +static int ti_emif_alloc_sram(struct device *dev, + struct ti_emif_data *emif_data) +{ + struct device_node *np = dev->of_node; + int ret; + + emif_data->sram_pool_code = of_gen_pool_get(np, "sram", 0); + if (!emif_data->sram_pool_code) { + dev_err(dev, "Unable to get sram pool for ocmcram code\n"); + return -ENODEV; + } + + emif_data->ti_emif_sram_virt = + gen_pool_alloc(emif_data->sram_pool_code, + ti_emif_sram_sz); + if (!emif_data->ti_emif_sram_virt) { + dev_err(dev, "Unable to allocate code memory from ocmcram\n"); + return -ENOMEM; + } + + /* Save physical address to calculate resume offset during pm init */ + emif_data->ti_emif_sram_phys = + gen_pool_virt_to_phys(emif_data->sram_pool_code, + emif_data->ti_emif_sram_virt); + + /* Get sram pool for data section and allocate space */ + emif_data->sram_pool_data = of_gen_pool_get(np, "sram", 1); + if (!emif_data->sram_pool_data) { + dev_err(dev, "Unable to get sram pool for ocmcram data\n"); + ret = -ENODEV; + goto err_free_sram_code; + } + + emif_data->ti_emif_sram_data_virt = + gen_pool_alloc(emif_data->sram_pool_data, + sizeof(struct emif_regs_amx3)); + if (!emif_data->ti_emif_sram_data_virt) { + dev_err(dev, "Unable to allocate data memory from ocmcram\n"); + ret = -ENOMEM; + goto err_free_sram_code; + } + + /* Save physical address to calculate resume offset during pm init */ + emif_data->ti_emif_sram_data_phys = + gen_pool_virt_to_phys(emif_data->sram_pool_data, + emif_data->ti_emif_sram_data_virt); + /* + * These functions are called during suspend path while MMU is + * still on so add virtual base to offset for absolute address + */ + emif_data->pm_functions.save_context = + sram_suspend_address(emif_data, + (unsigned long)ti_emif_save_context); + emif_data->pm_functions.enter_sr = + sram_suspend_address(emif_data, + (unsigned long)ti_emif_enter_sr); + emif_data->pm_functions.abort_sr = + sram_suspend_address(emif_data, + (unsigned long)ti_emif_abort_sr); + + /* + * These are called during resume path when MMU is not enabled + * so physical address is used instead + */ + emif_data->pm_functions.restore_context = + sram_resume_address(emif_data, + (unsigned long)ti_emif_restore_context); + emif_data->pm_functions.exit_sr = + sram_resume_address(emif_data, + (unsigned long)ti_emif_exit_sr); + + emif_data->pm_data.regs_virt = + (struct emif_regs_amx3 *)emif_data->ti_emif_sram_data_virt; + emif_data->pm_data.regs_phys = emif_data->ti_emif_sram_data_phys; + + return 0; + +err_free_sram_code: + gen_pool_free(emif_data->sram_pool_code, emif_data->ti_emif_sram_virt, + ti_emif_sram_sz); + return ret; +} + +static int ti_emif_push_sram(struct device *dev, struct ti_emif_data *emif_data) +{ + void *copy_addr; + u32 data_addr; + + copy_addr = sram_exec_copy(emif_data->sram_pool_code, + (void *)emif_data->ti_emif_sram_virt, + &ti_emif_sram, ti_emif_sram_sz); + if (!copy_addr) { + dev_err(dev, "Cannot copy emif code to sram\n"); + return -ENODEV; + } + + data_addr = sram_suspend_address(emif_data, + (unsigned long)&ti_emif_pm_sram_data); + copy_addr = sram_exec_copy(emif_data->sram_pool_code, + (void *)data_addr, + &emif_data->pm_data, + sizeof(emif_data->pm_data)); + if (!copy_addr) { + dev_err(dev, "Cannot copy emif data to code sram\n"); + return -ENODEV; + } + + return 0; +} + +/* + * Due to Usage Note 3.1.2 "DDR3: JEDEC Compliance for Maximum + * Self-Refresh Command Limit" found in AM335x Silicon Errata + * (Document SPRZ360F Revised November 2013) we must configure + * the self refresh delay timer to 0xA (8192 cycles) to avoid + * generating too many refresh command from the EMIF. + */ +static void ti_emif_configure_sr_delay(struct ti_emif_data *emif_data) +{ + writel(EMIF_POWER_MGMT_WAIT_SELF_REFRESH_8192_CYCLES, + (emif_data->pm_data.ti_emif_base_addr_virt + + EMIF_POWER_MANAGEMENT_CONTROL)); + + writel(EMIF_POWER_MGMT_WAIT_SELF_REFRESH_8192_CYCLES, + (emif_data->pm_data.ti_emif_base_addr_virt + + EMIF_POWER_MANAGEMENT_CTRL_SHDW)); +} + +/** + * ti_emif_copy_pm_function_table - copy mapping of pm funcs in sram + * @sram_pool: pointer to struct gen_pool where dst resides + * @dst: void * to address that table should be copied + * + * Returns 0 if success other error code if table is not available + */ +int ti_emif_copy_pm_function_table(struct gen_pool *sram_pool, void *dst) +{ + void *copy_addr; + + if (!emif_instance) + return -ENODEV; + + copy_addr = sram_exec_copy(sram_pool, dst, + &emif_instance->pm_functions, + sizeof(emif_instance->pm_functions)); + if (!copy_addr) + return -ENODEV; + + return 0; +} +EXPORT_SYMBOL_GPL(ti_emif_copy_pm_function_table); + +/** + * ti_emif_get_mem_type - return type for memory type in use + * + * Returns memory type value read from EMIF or error code if fails + */ +int ti_emif_get_mem_type(void) +{ + unsigned long temp; + + if (!emif_instance) + return -ENODEV; + + temp = readl(emif_instance->pm_data.ti_emif_base_addr_virt + + EMIF_SDRAM_CONFIG); + + temp = (temp & SDRAM_TYPE_MASK) >> SDRAM_TYPE_SHIFT; + return temp; +} +EXPORT_SYMBOL_GPL(ti_emif_get_mem_type); + +static const struct of_device_id ti_emif_of_match[] = { + { .compatible = "ti,emif-am3352", .data = + (void *)EMIF_SRAM_AM33_REG_LAYOUT, }, + { .compatible = "ti,emif-am4372", .data = + (void *)EMIF_SRAM_AM43_REG_LAYOUT, }, + {}, +}; +MODULE_DEVICE_TABLE(of, ti_emif_of_match); + +static int ti_emif_probe(struct platform_device *pdev) +{ + int ret; + struct resource *res; + struct device *dev = &pdev->dev; + const struct of_device_id *match; + struct ti_emif_data *emif_data; + + emif_data = devm_kzalloc(dev, sizeof(*emif_data), GFP_KERNEL); + if (!emif_data) + return -ENOMEM; + + match = of_match_device(ti_emif_of_match, &pdev->dev); + if (!match) + return -ENODEV; + + emif_data->pm_data.ti_emif_sram_config = (unsigned long)match->data; + + pm_runtime_enable(dev); + ret = pm_runtime_get_sync(dev); + if (ret < 0) { + dev_err(dev, "pm_runtime_get_sync() failed\n"); + goto fail_runtime_put; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + emif_data->pm_data.ti_emif_base_addr_virt = devm_ioremap_resource(dev, + res); + if (IS_ERR(emif_data->pm_data.ti_emif_base_addr_virt)) { + dev_err(dev, "could not ioremap emif mem\n"); + ret = PTR_ERR(emif_data->pm_data.ti_emif_base_addr_virt); + goto fail_runtime_put; + } + + emif_data->pm_data.ti_emif_base_addr_phys = res->start; + + ti_emif_configure_sr_delay(emif_data); + + ret = ti_emif_alloc_sram(dev, emif_data); + if (ret) + goto fail_runtime_put; + + ret = ti_emif_push_sram(dev, emif_data); + if (ret) + goto fail_free_sram; + + emif_instance = emif_data; + + return 0; + +fail_free_sram: + ti_emif_free_sram(emif_data); +fail_runtime_put: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + return ret; +} + +static int ti_emif_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct ti_emif_data *emif_data = emif_instance; + + emif_instance = NULL; + + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + + ti_emif_free_sram(emif_data); + + return 0; +} + +static struct platform_driver ti_emif_driver = { + .probe = ti_emif_probe, + .remove = ti_emif_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = of_match_ptr(ti_emif_of_match), + }, +}; +module_platform_driver(ti_emif_driver); + +MODULE_AUTHOR("Dave Gerlach "); +MODULE_DESCRIPTION("Texas Instruments SRAM EMIF driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/memory/ti-emif-sram-pm.S b/drivers/memory/ti-emif-sram-pm.S new file mode 100644 index 000000000000..a5369181e5c2 --- /dev/null +++ b/drivers/memory/ti-emif-sram-pm.S @@ -0,0 +1,334 @@ +/* + * Low level PM code for TI EMIF + * + * Copyright (C) 2016-2017 Texas Instruments Incorporated - http://www.ti.com/ + * Dave Gerlach + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include + +#include "emif.h" + +#define EMIF_POWER_MGMT_WAIT_SELF_REFRESH_8192_CYCLES 0x00a0 +#define EMIF_POWER_MGMT_SR_TIMER_MASK 0x00f0 +#define EMIF_POWER_MGMT_SELF_REFRESH_MODE 0x0200 +#define EMIF_POWER_MGMT_SELF_REFRESH_MODE_MASK 0x0700 + +#define EMIF_SDCFG_TYPE_DDR2 0x2 << SDRAM_TYPE_SHIFT +#define EMIF_STATUS_READY 0x4 + +#define AM43XX_EMIF_PHY_CTRL_REG_COUNT 0x120 + +#define EMIF_AM437X_REGISTERS 0x1 + + .arm + .align 3 + +ENTRY(ti_emif_sram) + +/* + * void ti_emif_save_context(void) + * + * Used during suspend to save the context of all required EMIF registers + * to local memory if the EMIF is going to lose context during the sleep + * transition. Operates on the VIRTUAL address of the EMIF. + */ +ENTRY(ti_emif_save_context) + stmfd sp!, {r4 - r11, lr} @ save registers on stack + + adr r4, ti_emif_pm_sram_data + ldr r0, [r4, #EMIF_PM_BASE_ADDR_VIRT_OFFSET] + ldr r2, [r4, #EMIF_PM_REGS_VIRT_OFFSET] + + /* Save EMIF configuration */ + ldr r1, [r0, #EMIF_SDRAM_CONFIG] + str r1, [r2, #EMIF_SDCFG_VAL_OFFSET] + + ldr r1, [r0, #EMIF_SDRAM_REFRESH_CONTROL] + str r1, [r2, #EMIF_REF_CTRL_VAL_OFFSET] + + ldr r1, [r0, #EMIF_SDRAM_TIMING_1] + str r1, [r2, #EMIF_TIMING1_VAL_OFFSET] + + ldr r1, [r0, #EMIF_SDRAM_TIMING_2] + str r1, [r2, #EMIF_TIMING2_VAL_OFFSET] + + ldr r1, [r0, #EMIF_SDRAM_TIMING_3] + str r1, [r2, #EMIF_TIMING3_VAL_OFFSET] + + ldr r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + str r1, [r2, #EMIF_PMCR_VAL_OFFSET] + + ldr r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] + str r1, [r2, #EMIF_PMCR_SHDW_VAL_OFFSET] + + ldr r1, [r0, #EMIF_SDRAM_OUTPUT_IMPEDANCE_CALIBRATION_CONFIG] + str r1, [r2, #EMIF_ZQCFG_VAL_OFFSET] + + ldr r1, [r0, #EMIF_DDR_PHY_CTRL_1] + str r1, [r2, #EMIF_DDR_PHY_CTLR_1_OFFSET] + + ldr r1, [r0, #EMIF_COS_CONFIG] + str r1, [r2, #EMIF_COS_CONFIG_OFFSET] + + ldr r1, [r0, #EMIF_PRIORITY_TO_CLASS_OF_SERVICE_MAPPING] + str r1, [r2, #EMIF_PRIORITY_TO_COS_MAPPING_OFFSET] + + ldr r1, [r0, #EMIF_CONNECTION_ID_TO_CLASS_OF_SERVICE_1_MAPPING] + str r1, [r2, #EMIF_CONNECT_ID_SERV_1_MAP_OFFSET] + + ldr r1, [r0, #EMIF_CONNECTION_ID_TO_CLASS_OF_SERVICE_2_MAPPING] + str r1, [r2, #EMIF_CONNECT_ID_SERV_2_MAP_OFFSET] + + ldr r1, [r0, #EMIF_OCP_CONFIG] + str r1, [r2, #EMIF_OCP_CONFIG_VAL_OFFSET] + + ldr r5, [r4, #EMIF_PM_CONFIG_OFFSET] + cmp r5, #EMIF_SRAM_AM43_REG_LAYOUT + bne emif_skip_save_extra_regs + + ldr r1, [r0, #EMIF_READ_WRITE_LEVELING_RAMP_CONTROL] + str r1, [r2, #EMIF_RD_WR_LEVEL_RAMP_CTRL_OFFSET] + + ldr r1, [r0, #EMIF_READ_WRITE_EXECUTION_THRESHOLD] + str r1, [r2, #EMIF_RD_WR_EXEC_THRESH_OFFSET] + + ldr r1, [r0, #EMIF_LPDDR2_NVM_TIMING] + str r1, [r2, #EMIF_LPDDR2_NVM_TIM_OFFSET] + + ldr r1, [r0, #EMIF_LPDDR2_NVM_TIMING_SHDW] + str r1, [r2, #EMIF_LPDDR2_NVM_TIM_SHDW_OFFSET] + + ldr r1, [r0, #EMIF_DLL_CALIB_CTRL] + str r1, [r2, #EMIF_DLL_CALIB_CTRL_VAL_OFFSET] + + ldr r1, [r0, #EMIF_DLL_CALIB_CTRL_SHDW] + str r1, [r2, #EMIF_DLL_CALIB_CTRL_VAL_SHDW_OFFSET] + + /* Loop and save entire block of emif phy regs */ + mov r5, #0x0 + add r4, r2, #EMIF_EXT_PHY_CTRL_VALS_OFFSET + add r3, r0, #EMIF_EXT_PHY_CTRL_1 +ddr_phy_ctrl_save: + ldr r1, [r3, r5] + str r1, [r4, r5] + add r5, r5, #0x4 + cmp r5, #AM43XX_EMIF_PHY_CTRL_REG_COUNT + bne ddr_phy_ctrl_save + +emif_skip_save_extra_regs: + ldmfd sp!, {r4 - r11, pc} @ restore regs and return +ENDPROC(ti_emif_save_context) + +/* + * void ti_emif_restore_context(void) + * + * Used during resume to restore the context of all required EMIF registers + * from local memory after the EMIF has lost context during a sleep transition. + * Operates on the PHYSICAL address of the EMIF. + */ +ENTRY(ti_emif_restore_context) + adr r4, ti_emif_pm_sram_data + ldr r0, [r4, #EMIF_PM_BASE_ADDR_PHYS_OFFSET] + ldr r2, [r4, #EMIF_PM_REGS_PHYS_OFFSET] + + /* Config EMIF Timings */ + ldr r1, [r2, #EMIF_DDR_PHY_CTLR_1_OFFSET] + str r1, [r0, #EMIF_DDR_PHY_CTRL_1] + str r1, [r0, #EMIF_DDR_PHY_CTRL_1_SHDW] + + ldr r1, [r2, #EMIF_TIMING1_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_TIMING_1] + str r1, [r0, #EMIF_SDRAM_TIMING_1_SHDW] + + ldr r1, [r2, #EMIF_TIMING2_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_TIMING_2] + str r1, [r0, #EMIF_SDRAM_TIMING_2_SHDW] + + ldr r1, [r2, #EMIF_TIMING3_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_TIMING_3] + str r1, [r0, #EMIF_SDRAM_TIMING_3_SHDW] + + ldr r1, [r2, #EMIF_REF_CTRL_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_REFRESH_CONTROL] + str r1, [r0, #EMIF_SDRAM_REFRESH_CTRL_SHDW] + + ldr r1, [r2, #EMIF_PMCR_VAL_OFFSET] + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + + ldr r1, [r2, #EMIF_PMCR_SHDW_VAL_OFFSET] + str r1, [r0, #EMIF_POWER_MANAGEMENT_CTRL_SHDW] + + ldr r1, [r2, #EMIF_COS_CONFIG_OFFSET] + str r1, [r0, #EMIF_COS_CONFIG] + + ldr r1, [r2, #EMIF_PRIORITY_TO_COS_MAPPING_OFFSET] + str r1, [r0, #EMIF_PRIORITY_TO_CLASS_OF_SERVICE_MAPPING] + + ldr r1, [r2, #EMIF_CONNECT_ID_SERV_1_MAP_OFFSET] + str r1, [r0, #EMIF_CONNECTION_ID_TO_CLASS_OF_SERVICE_1_MAPPING] + + ldr r1, [r2, #EMIF_CONNECT_ID_SERV_2_MAP_OFFSET] + str r1, [r0, #EMIF_CONNECTION_ID_TO_CLASS_OF_SERVICE_2_MAPPING] + + ldr r1, [r2, #EMIF_OCP_CONFIG_VAL_OFFSET] + str r1, [r0, #EMIF_OCP_CONFIG] + + ldr r5, [r4, #EMIF_PM_CONFIG_OFFSET] + cmp r5, #EMIF_SRAM_AM43_REG_LAYOUT + bne emif_skip_restore_extra_regs + + ldr r1, [r2, #EMIF_RD_WR_LEVEL_RAMP_CTRL_OFFSET] + str r1, [r0, #EMIF_READ_WRITE_LEVELING_RAMP_CONTROL] + + ldr r1, [r2, #EMIF_RD_WR_EXEC_THRESH_OFFSET] + str r1, [r0, #EMIF_READ_WRITE_EXECUTION_THRESHOLD] + + ldr r1, [r2, #EMIF_LPDDR2_NVM_TIM_OFFSET] + str r1, [r0, #EMIF_LPDDR2_NVM_TIMING] + + ldr r1, [r2, #EMIF_LPDDR2_NVM_TIM_SHDW_OFFSET] + str r1, [r0, #EMIF_LPDDR2_NVM_TIMING_SHDW] + + ldr r1, [r2, #EMIF_DLL_CALIB_CTRL_VAL_OFFSET] + str r1, [r0, #EMIF_DLL_CALIB_CTRL] + + ldr r1, [r2, #EMIF_DLL_CALIB_CTRL_VAL_SHDW_OFFSET] + str r1, [r0, #EMIF_DLL_CALIB_CTRL_SHDW] + + ldr r1, [r2, #EMIF_ZQCFG_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_OUTPUT_IMPEDANCE_CALIBRATION_CONFIG] + + /* Loop and restore entire block of emif phy regs */ + mov r5, #0x0 + /* Load ti_emif_regs_amx3 + EMIF_EXT_PHY_CTRL_VALS_OFFSET for address + * to phy register save space + */ + add r3, r2, #EMIF_EXT_PHY_CTRL_VALS_OFFSET + add r4, r0, #EMIF_EXT_PHY_CTRL_1 +ddr_phy_ctrl_restore: + ldr r1, [r3, r5] + str r1, [r4, r5] + add r5, r5, #0x4 + cmp r5, #AM43XX_EMIF_PHY_CTRL_REG_COUNT + bne ddr_phy_ctrl_restore + +emif_skip_restore_extra_regs: + /* + * Output impedence calib needed only for DDR3 + * but since the initial state of this will be + * disabled for DDR2 no harm in restoring the + * old configuration + */ + ldr r1, [r2, #EMIF_ZQCFG_VAL_OFFSET] + str r1, [r0, #EMIF_SDRAM_OUTPUT_IMPEDANCE_CALIBRATION_CONFIG] + + /* Write to sdcfg last for DDR2 only */ + ldr r1, [r2, #EMIF_SDCFG_VAL_OFFSET] + and r2, r1, #SDRAM_TYPE_MASK + cmp r2, #EMIF_SDCFG_TYPE_DDR2 + streq r1, [r0, #EMIF_SDRAM_CONFIG] + + mov pc, lr +ENDPROC(ti_emif_restore_context) + +/* + * void ti_emif_enter_sr(void) + * + * Programs the EMIF to tell the SDRAM to enter into self-refresh + * mode during a sleep transition. Operates on the VIRTUAL address + * of the EMIF. + */ +ENTRY(ti_emif_enter_sr) + stmfd sp!, {r4 - r11, lr} @ save registers on stack + + adr r4, ti_emif_pm_sram_data + ldr r0, [r4, #EMIF_PM_BASE_ADDR_VIRT_OFFSET] + ldr r2, [r4, #EMIF_PM_REGS_VIRT_OFFSET] + + ldr r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + bic r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE_MASK + orr r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + + ldmfd sp!, {r4 - r11, pc} @ restore regs and return +ENDPROC(ti_emif_enter_sr) + +/* + * void ti_emif_exit_sr(void) + * + * Programs the EMIF to tell the SDRAM to exit self-refresh mode + * after a sleep transition. Operates on the PHYSICAL address of + * the EMIF. + */ +ENTRY(ti_emif_exit_sr) + adr r4, ti_emif_pm_sram_data + ldr r0, [r4, #EMIF_PM_BASE_ADDR_PHYS_OFFSET] + ldr r2, [r4, #EMIF_PM_REGS_PHYS_OFFSET] + + /* + * Toggle EMIF to exit refresh mode: + * if EMIF lost context, PWR_MGT_CTRL is currently 0, writing disable + * (0x0), wont do diddly squat! so do a toggle from SR(0x2) to disable + * (0x0) here. + * *If* EMIF did not lose context, nothing broken as we write the same + * value(0x2) to reg before we write a disable (0x0). + */ + ldr r1, [r2, #EMIF_PMCR_VAL_OFFSET] + bic r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE_MASK + orr r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + bic r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE_MASK + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + + /* Wait for EMIF to become ready */ +1: ldr r1, [r0, #EMIF_STATUS] + tst r1, #EMIF_STATUS_READY + beq 1b + + mov pc, lr +ENDPROC(ti_emif_exit_sr) + +/* + * void ti_emif_abort_sr(void) + * + * Disables self-refresh after a failed transition to a low-power + * state so the kernel can jump back to DDR and follow abort path. + * Operates on the VIRTUAL address of the EMIF. + */ +ENTRY(ti_emif_abort_sr) + stmfd sp!, {r4 - r11, lr} @ save registers on stack + + adr r4, ti_emif_pm_sram_data + ldr r0, [r4, #EMIF_PM_BASE_ADDR_VIRT_OFFSET] + ldr r2, [r4, #EMIF_PM_REGS_VIRT_OFFSET] + + ldr r1, [r2, #EMIF_PMCR_VAL_OFFSET] + bic r1, r1, #EMIF_POWER_MGMT_SELF_REFRESH_MODE_MASK + str r1, [r0, #EMIF_POWER_MANAGEMENT_CONTROL] + + /* Wait for EMIF to become ready */ +1: ldr r1, [r0, #EMIF_STATUS] + tst r1, #EMIF_STATUS_READY + beq 1b + + ldmfd sp!, {r4 - r11, pc} @ restore regs and return +ENDPROC(ti_emif_abort_sr) + + .align 3 +ENTRY(ti_emif_pm_sram_data) + .space EMIF_PM_DATA_SIZE +ENTRY(ti_emif_sram_sz) + .word . - ti_emif_save_context diff --git a/include/linux/ti-emif-sram.h b/include/linux/ti-emif-sram.h new file mode 100644 index 000000000000..a923cdf1273d --- /dev/null +++ b/include/linux/ti-emif-sram.h @@ -0,0 +1,144 @@ +/* + * TI AM33XX EMIF Routines + * + * Copyright (C) 2016-2017 Texas Instruments Inc. + * Dave Gerlach + * + * 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 version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#ifndef __LINUX_TI_EMIF_H +#define __LINUX_TI_EMIF_H + +#include +#include +#ifndef __ASSEMBLY__ + +struct emif_regs_amx3 { + u32 emif_sdcfg_val; + u32 emif_timing1_val; + u32 emif_timing2_val; + u32 emif_timing3_val; + u32 emif_ref_ctrl_val; + u32 emif_zqcfg_val; + u32 emif_pmcr_val; + u32 emif_pmcr_shdw_val; + u32 emif_rd_wr_level_ramp_ctrl; + u32 emif_rd_wr_exec_thresh; + u32 emif_cos_config; + u32 emif_priority_to_cos_mapping; + u32 emif_connect_id_serv_1_map; + u32 emif_connect_id_serv_2_map; + u32 emif_ocp_config_val; + u32 emif_lpddr2_nvm_tim; + u32 emif_lpddr2_nvm_tim_shdw; + u32 emif_dll_calib_ctrl_val; + u32 emif_dll_calib_ctrl_val_shdw; + u32 emif_ddr_phy_ctlr_1; + u32 emif_ext_phy_ctrl_vals[120]; +}; + +struct ti_emif_pm_data { + void __iomem *ti_emif_base_addr_virt; + phys_addr_t ti_emif_base_addr_phys; + unsigned long ti_emif_sram_config; + struct emif_regs_amx3 *regs_virt; + phys_addr_t regs_phys; +} __packed __aligned(8); + +struct ti_emif_pm_functions { + u32 save_context; + u32 restore_context; + u32 enter_sr; + u32 exit_sr; + u32 abort_sr; +} __packed __aligned(8); + +static inline void ti_emif_offsets(void) +{ + DEFINE(EMIF_SDCFG_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_sdcfg_val)); + DEFINE(EMIF_TIMING1_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_timing1_val)); + DEFINE(EMIF_TIMING2_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_timing2_val)); + DEFINE(EMIF_TIMING3_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_timing3_val)); + DEFINE(EMIF_REF_CTRL_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_ref_ctrl_val)); + DEFINE(EMIF_ZQCFG_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_zqcfg_val)); + DEFINE(EMIF_PMCR_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_pmcr_val)); + DEFINE(EMIF_PMCR_SHDW_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_pmcr_shdw_val)); + DEFINE(EMIF_RD_WR_LEVEL_RAMP_CTRL_OFFSET, + offsetof(struct emif_regs_amx3, emif_rd_wr_level_ramp_ctrl)); + DEFINE(EMIF_RD_WR_EXEC_THRESH_OFFSET, + offsetof(struct emif_regs_amx3, emif_rd_wr_exec_thresh)); + DEFINE(EMIF_COS_CONFIG_OFFSET, + offsetof(struct emif_regs_amx3, emif_cos_config)); + DEFINE(EMIF_PRIORITY_TO_COS_MAPPING_OFFSET, + offsetof(struct emif_regs_amx3, emif_priority_to_cos_mapping)); + DEFINE(EMIF_CONNECT_ID_SERV_1_MAP_OFFSET, + offsetof(struct emif_regs_amx3, emif_connect_id_serv_1_map)); + DEFINE(EMIF_CONNECT_ID_SERV_2_MAP_OFFSET, + offsetof(struct emif_regs_amx3, emif_connect_id_serv_2_map)); + DEFINE(EMIF_OCP_CONFIG_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_ocp_config_val)); + DEFINE(EMIF_LPDDR2_NVM_TIM_OFFSET, + offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim)); + DEFINE(EMIF_LPDDR2_NVM_TIM_SHDW_OFFSET, + offsetof(struct emif_regs_amx3, emif_lpddr2_nvm_tim_shdw)); + DEFINE(EMIF_DLL_CALIB_CTRL_VAL_OFFSET, + offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val)); + DEFINE(EMIF_DLL_CALIB_CTRL_VAL_SHDW_OFFSET, + offsetof(struct emif_regs_amx3, emif_dll_calib_ctrl_val_shdw)); + DEFINE(EMIF_DDR_PHY_CTLR_1_OFFSET, + offsetof(struct emif_regs_amx3, emif_ddr_phy_ctlr_1)); + DEFINE(EMIF_EXT_PHY_CTRL_VALS_OFFSET, + offsetof(struct emif_regs_amx3, emif_ext_phy_ctrl_vals)); + DEFINE(EMIF_REGS_AMX3_SIZE, sizeof(struct emif_regs_amx3)); + + BLANK(); + + DEFINE(EMIF_PM_BASE_ADDR_VIRT_OFFSET, + offsetof(struct ti_emif_pm_data, ti_emif_base_addr_virt)); + DEFINE(EMIF_PM_BASE_ADDR_PHYS_OFFSET, + offsetof(struct ti_emif_pm_data, ti_emif_base_addr_phys)); + DEFINE(EMIF_PM_CONFIG_OFFSET, + offsetof(struct ti_emif_pm_data, ti_emif_sram_config)); + DEFINE(EMIF_PM_REGS_VIRT_OFFSET, + offsetof(struct ti_emif_pm_data, regs_virt)); + DEFINE(EMIF_PM_REGS_PHYS_OFFSET, + offsetof(struct ti_emif_pm_data, regs_phys)); + DEFINE(EMIF_PM_DATA_SIZE, sizeof(struct ti_emif_pm_data)); + + BLANK(); + + DEFINE(EMIF_PM_SAVE_CONTEXT_OFFSET, + offsetof(struct ti_emif_pm_functions, save_context)); + DEFINE(EMIF_PM_RESTORE_CONTEXT_OFFSET, + offsetof(struct ti_emif_pm_functions, restore_context)); + DEFINE(EMIF_PM_ENTER_SR_OFFSET, + offsetof(struct ti_emif_pm_functions, enter_sr)); + DEFINE(EMIF_PM_EXIT_SR_OFFSET, + offsetof(struct ti_emif_pm_functions, exit_sr)); + DEFINE(EMIF_PM_ABORT_SR_OFFSET, + offsetof(struct ti_emif_pm_functions, abort_sr)); + DEFINE(EMIF_PM_FUNCTIONS_SIZE, sizeof(struct ti_emif_pm_functions)); +} + +struct gen_pool; + +int ti_emif_copy_pm_function_table(struct gen_pool *sram_pool, void *dst); +int ti_emif_get_mem_type(void); + +#endif +#endif /* __LINUX_TI_EMIF_H */