From patchwork Thu Apr 15 10:49:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Claudiu Beznea X-Patchwork-Id: 421883 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78D1DC433ED for ; Thu, 15 Apr 2021 10:51:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5ED8B6137D for ; Thu, 15 Apr 2021 10:51:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232681AbhDOKv7 (ORCPT ); Thu, 15 Apr 2021 06:51:59 -0400 Received: from esa.microchip.iphmx.com ([68.232.153.233]:49604 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232677AbhDOKv5 (ORCPT ); Thu, 15 Apr 2021 06:51:57 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1618483895; x=1650019895; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SwingqruFsTILHdNsRp4kbqGCt+RbaMioerNsU0GdOE=; b=UYq/F1VhwsSkMf3MRYJepHafPSNW3nHhzyKXoAsMumGlDpC3cu5r5ZTz pNjs5KIxpPyb5dKOBwHCUZWs6xx4CH6blmtVfvcfSvAdbHoFAmZqAtFDI BEkK6QqGq7ZoCt+MKxgg4C4gtDyMYOO2B6V4I5ewPJlWiB2HVh1r2sC8m V05NFoz2TH6y282OzoIwtiyJpuC8mU15gEQMSufN4u5oqI5lpdQYntpwh Ex13xE4XCJNP2VXHR9CecOStdOsgdSu43Q3KLh4SHvHBVGrsqVsWT9/9h 2y7ZxbboVXg3V3v+maWPzMfFXThn/uOfcmfRjhGHsTlAfF3Ycrc23Zq/h w==; IronPort-SDR: KXUzPUXMd6oWiuqsjWAiCy82WEGcJWxACsBF03F4RtoHfRLACu88rsA+9BqXDvlUZ8VIZD+rfG 2frrSgTzNJ30rX3BUGCvMVHKEofP/4AdpuorlqbQ7OoPpOt0Vgz7hiLkpYLgybsOzO9Ae7ZA1A fodjUaNQfyv1EAkUMoOW7S+dqkeDm3xFzVkP4lDo9iJlm8xBho8i6LkfoYXO+7SnAFWmehp8RS 28S5Onby2+6h9Xnpi9XuvKXU5USrCBEdtrY91ZXJ5YPsPsoJ9VScC9FwUmviqvFsPRMWVOcixk 7WM= X-IronPort-AV: E=Sophos;i="5.82,223,1613458800"; d="scan'208";a="116551656" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa5.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Apr 2021 03:51:35 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Thu, 15 Apr 2021 03:51:34 -0700 Received: from m18063-ThinkPad-T460p.mchp-main.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2176.2 via Frontend Transport; Thu, 15 Apr 2021 03:51:31 -0700 From: Claudiu Beznea To: , , , , CC: , , , Claudiu Beznea Subject: [PATCH v3 12/24] ARM: at91: pm: add self-refresh support for sama7g5 Date: Thu, 15 Apr 2021 13:49:58 +0300 Message-ID: <20210415105010.569620-13-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210415105010.569620-1-claudiu.beznea@microchip.com> References: <20210415105010.569620-1-claudiu.beznea@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add self-refresh support for SAMA7G5. Signed-off-by: Claudiu Beznea --- arch/arm/mach-at91/pm.h | 2 + arch/arm/mach-at91/pm_data-offsets.c | 2 + arch/arm/mach-at91/pm_suspend.S | 199 +++++++++++++++++++++++++++ 3 files changed, 203 insertions(+) diff --git a/arch/arm/mach-at91/pm.h b/arch/arm/mach-at91/pm.h index bfb260be371e..666474088d55 100644 --- a/arch/arm/mach-at91/pm.h +++ b/arch/arm/mach-at91/pm.h @@ -12,6 +12,7 @@ #include #include #include +#include #define AT91_MEMCTRL_MC 0 #define AT91_MEMCTRL_SDRAMC 1 @@ -27,6 +28,7 @@ struct at91_pm_data { void __iomem *pmc; void __iomem *ramc[2]; + void __iomem *ramc_phy; unsigned long uhp_udp_mask; unsigned int memctrl; unsigned int mode; diff --git a/arch/arm/mach-at91/pm_data-offsets.c b/arch/arm/mach-at91/pm_data-offsets.c index 82089ff258c0..40bd4e8fe40a 100644 --- a/arch/arm/mach-at91/pm_data-offsets.c +++ b/arch/arm/mach-at91/pm_data-offsets.c @@ -8,6 +8,8 @@ int main(void) DEFINE(PM_DATA_PMC, offsetof(struct at91_pm_data, pmc)); DEFINE(PM_DATA_RAMC0, offsetof(struct at91_pm_data, ramc[0])); DEFINE(PM_DATA_RAMC1, offsetof(struct at91_pm_data, ramc[1])); + DEFINE(PM_DATA_RAMC_PHY, offsetof(struct at91_pm_data, + ramc_phy)); DEFINE(PM_DATA_MEMCTRL, offsetof(struct at91_pm_data, memctrl)); DEFINE(PM_DATA_MODE, offsetof(struct at91_pm_data, mode)); DEFINE(PM_DATA_SHDWC, offsetof(struct at91_pm_data, shdwc)); diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S index 7669b32d5257..84418120ba67 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -87,6 +87,200 @@ tmp3 .req r6 .arm +#ifdef CONFIG_SOC_SAMA7 +/** + * Enable self-refresh + * + * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3, r7 + */ +.macro at91_sramc_self_refresh_ena + ldr r2, .sramc_base + ldr r3, .sramc_phy_base + ldr r7, .pm_mode + + dsb + + /* Disable all AXI ports. */ + ldr tmp1, [r2, #UDDRC_PCTRL_0] + bic tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_0] + + ldr tmp1, [r2, #UDDRC_PCTRL_1] + bic tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_1] + + ldr tmp1, [r2, #UDDRC_PCTRL_2] + bic tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_2] + + ldr tmp1, [r2, #UDDRC_PCTRL_3] + bic tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_3] + + ldr tmp1, [r2, #UDDRC_PCTRL_4] + bic tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_4] + +sr_ena_1: + /* Wait for all ports to disable. */ + ldr tmp1, [r2, #UDDRC_PSTAT] + ldr tmp2, =UDDRC_PSTAT_ALL_PORTS + tst tmp1, tmp2 + bne sr_ena_1 + + /* Switch to self-refresh. */ + ldr tmp1, [r2, #UDDRC_PWRCTL] + orr tmp1, tmp1, #UDDRC_PWRCTRL_SELFREF_SW + str tmp1, [r2, #UDDRC_PWRCTL] + +sr_ena_2: + /* Wait for self-refresh enter. */ + ldr tmp1, [r2, #UDDRC_STAT] + bic tmp1, tmp1, #~UDDRC_STAT_SELFREF_TYPE_MSK + cmp tmp1, #UDDRC_STAT_SELFREF_TYPE_SW + bne sr_ena_2 + + /* Put DDR PHY's DLL in bypass mode for non-backup modes. */ + cmp r7, #AT91_PM_BACKUP + beq sr_ena_3 + ldr tmp1, [r3, #DDR3PHY_PIR] + orr tmp1, tmp1, #DDR3PHY_PIR_DLLBYP + str tmp1, [r3, #DDR3PHY_PIR] + +sr_ena_3: + /* Power down DDR PHY data receivers. */ + ldr tmp1, [r3, #DDR3PHY_DXCCR] + orr tmp1, tmp1, #DDR3PHY_DXCCR_DXPDR + str tmp1, [r3, #DDR3PHY_DXCCR] + + /* Power down ADDR/CMD IO. */ + ldr tmp1, [r3, #DDR3PHY_ACIOCR] + orr tmp1, tmp1, #DDR3PHY_ACIORC_ACPDD + orr tmp1, tmp1, #DDR3PHY_ACIOCR_CKPDD_CK0 + orr tmp1, tmp1, #DDR3PHY_ACIOCR_CSPDD_CS0 + str tmp1, [r3, #DDR3PHY_ACIOCR] + + /* Power down ODT. */ + ldr tmp1, [r3, #DDR3PHY_DSGCR] + orr tmp1, tmp1, #DDR3PHY_DSGCR_ODTPDD_ODT0 + str tmp1, [r3, #DDR3PHY_DSGCR] +.endm + +/** + * Disable self-refresh + * + * Side effects: overwrites r2, r3, tmp1, tmp2, tmp3 + */ +.macro at91_sramc_self_refresh_dis + ldr r2, .sramc_base + ldr r3, .sramc_phy_base + + /* Power up DDR PHY data receivers. */ + ldr tmp1, [r3, #DDR3PHY_DXCCR] + bic tmp1, tmp1, #DDR3PHY_DXCCR_DXPDR + str tmp1, [r3, #DDR3PHY_DXCCR] + + /* Power up the output of CK and CS pins. */ + ldr tmp1, [r3, #DDR3PHY_ACIOCR] + bic tmp1, tmp1, #DDR3PHY_ACIORC_ACPDD + bic tmp1, tmp1, #DDR3PHY_ACIOCR_CKPDD_CK0 + bic tmp1, tmp1, #DDR3PHY_ACIOCR_CSPDD_CS0 + str tmp1, [r3, #DDR3PHY_ACIOCR] + + /* Power up ODT. */ + ldr tmp1, [r3, #DDR3PHY_DSGCR] + bic tmp1, tmp1, #DDR3PHY_DSGCR_ODTPDD_ODT0 + str tmp1, [r3, #DDR3PHY_DSGCR] + + /* Take DDR PHY's DLL out of bypass mode. */ + ldr tmp1, [r3, #DDR3PHY_PIR] + bic tmp1, tmp1, #DDR3PHY_PIR_DLLBYP + str tmp1, [r3, #DDR3PHY_PIR] + + /* Enable quasi-dynamic programming. */ + mov tmp1, #0 + str tmp1, [r2, #UDDRC_SWCTRL] + + /* De-assert SDRAM initialization. */ + ldr tmp1, [r2, #UDDRC_DFIMISC] + bic tmp1, tmp1, #UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN + str tmp1, [r2, #UDDRC_DFIMISC] + + /* Quasi-dynamic programming done. */ + mov tmp1, #UDDRC_SWCTRL_SW_DONE + str tmp1, [r2, #UDDRC_SWCTRL] + +sr_dis_1: + ldr tmp1, [r2, #UDDRC_SWSTAT] + tst tmp1, #UDDRC_SWSTAT_SW_DONE_ACK + beq sr_dis_1 + + /* DLL soft-reset + DLL lock wait + ITM reset */ + mov tmp1, #(DDR3PHY_PIR_INIT | DDR3PHY_PIR_DLLSRST | \ + DDR3PHY_PIR_DLLLOCK | DDR3PHY_PIR_ITMSRST) + str tmp1, [r3, #DDR3PHY_PIR] + +sr_dis_4: + /* Wait for it. */ + ldr tmp1, [r3, #DDR3PHY_PGSR] + tst tmp1, #DDR3PHY_PGSR_IDONE + beq sr_dis_4 + + /* Enable quasi-dynamic programming. */ + mov tmp1, #0 + str tmp1, [r2, #UDDRC_SWCTRL] + + /* Assert PHY init complete enable signal. */ + ldr tmp1, [r2, #UDDRC_DFIMISC] + orr tmp1, tmp1, #UDDRC_DFIMISC_DFI_INIT_COMPLETE_EN + str tmp1, [r2, #UDDRC_DFIMISC] + + /* Programming is done. Set sw_done. */ + mov tmp1, #UDDRC_SWCTRL_SW_DONE + str tmp1, [r2, #UDDRC_SWCTRL] + +sr_dis_5: + /* Wait for it. */ + ldr tmp1, [r2, #UDDRC_SWSTAT] + tst tmp1, #UDDRC_SWSTAT_SW_DONE_ACK + beq sr_dis_5 + + /* Trigger self-refresh exit. */ + ldr tmp1, [r2, #UDDRC_PWRCTL] + bic tmp1, tmp1, #UDDRC_PWRCTRL_SELFREF_SW + str tmp1, [r2, #UDDRC_PWRCTL] + +sr_dis_6: + /* Wait for self-refresh exit done. */ + ldr tmp1, [r2, #UDDRC_STAT] + bic tmp1, tmp1, #~UDDRC_STAT_OPMODE_MSK + cmp tmp1, #UDDRC_STAT_OPMODE_NORMAL + bne sr_dis_6 + + /* Enable all AXI ports. */ + ldr tmp1, [r2, #UDDRC_PCTRL_0] + orr tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_0] + + ldr tmp1, [r2, #UDDRC_PCTRL_1] + orr tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_1] + + ldr tmp1, [r2, #UDDRC_PCTRL_2] + orr tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_2] + + ldr tmp1, [r2, #UDDRC_PCTRL_3] + orr tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_3] + + ldr tmp1, [r2, #UDDRC_PCTRL_4] + orr tmp1, tmp1, #0x1 + str tmp1, [r2, #UDDRC_PCTRL_4] + + dsb +.endm +#else /** * Enable self-refresh * @@ -228,6 +422,7 @@ sdramc_exit_sf: sr_dis_exit: .endm +#endif .macro at91_pm_ulp0_mode ldr pmc, .pmc_base @@ -668,6 +863,8 @@ ENTRY(at91_pm_suspend_in_sram) str tmp1, .sramc_base ldr tmp1, [r0, #PM_DATA_RAMC1] str tmp1, .sramc1_base + ldr tmp1, [r0, #PM_DATA_RAMC_PHY] + str tmp1, .sramc_phy_base ldr tmp1, [r0, #PM_DATA_MEMCTRL] str tmp1, .memtype ldr tmp1, [r0, #PM_DATA_MODE] @@ -721,6 +918,8 @@ ENDPROC(at91_pm_suspend_in_sram) .word 0 .sramc1_base: .word 0 +.sramc_phy_base: + .word 0 .shdwc: .word 0 .sfrbu: