From patchwork Thu Sep 19 15:14:12 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chin Liang See X-Patchwork-Id: 275978 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from theia.denx.de (theia.denx.de [85.214.87.163]) by ozlabs.org (Postfix) with ESMTP id 8E9B32C00FD for ; Fri, 20 Sep 2013 01:15:32 +1000 (EST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 787A14A0B8; Thu, 19 Sep 2013 17:15:26 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PSciregrgWGO; Thu, 19 Sep 2013 17:15:26 +0200 (CEST) Received: from theia.denx.de (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id BA5934A0CF; Thu, 19 Sep 2013 17:15:14 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by theia.denx.de (Postfix) with ESMTP id 31B8D4A0A5 for ; Thu, 19 Sep 2013 17:15:07 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at theia.denx.de Received: from theia.denx.de ([127.0.0.1]) by localhost (theia.denx.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Fe3oo-O-YIqj for ; Thu, 19 Sep 2013 17:15:01 +0200 (CEST) X-policyd-weight: NOT_IN_SBL_XBL_SPAMHAUS=-1.5 NOT_IN_SPAMCOP=-1.5 NOT_IN_BL_NJABL=-1.5 (only DNSBL check requested) Received: from db8outboundpool.messaging.microsoft.com (mail-db8lp0188.outbound.messaging.microsoft.com [213.199.154.188]) by theia.denx.de (Postfix) with ESMTPS id 33F394A09E for ; Thu, 19 Sep 2013 17:14:54 +0200 (CEST) Received: from mail38-db8-R.bigfish.com (10.174.8.252) by DB8EHSOBE014.bigfish.com (10.174.4.77) with Microsoft SMTP Server id 14.1.225.22; Thu, 19 Sep 2013 15:14:53 +0000 Received: from mail38-db8 (localhost [127.0.0.1]) by mail38-db8-R.bigfish.com (Postfix) with ESMTP id 50E273600B2; Thu, 19 Sep 2013 15:14:53 +0000 (UTC) X-Forefront-Antispam-Report: CIP:66.35.236.232; KIP:(null); UIP:(null); IPV:NLI; H:SJ-ITEXEDGE02.altera.priv.altera.com; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h208ch1ee6h1de0h1fdah2073h1202h1e76h1d1ah1d2ah1fc6hzz1de098h1de097h8275bhz2fh2a8h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h14ddh1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e1dh1e23h1fe8h1ff5h1155h) Received-SPF: pass (mail38-db8: domain of altera.com designates 66.35.236.232 as permitted sender) client-ip=66.35.236.232; envelope-from=clsee@altera.com; helo=SJ-ITEXEDGE02.altera.priv.altera.com ; v.altera.com ; Received: from mail38-db8 (localhost.localdomain [127.0.0.1]) by mail38-db8 (MessageSwitch) id 137960369095267_32260; Thu, 19 Sep 2013 15:14:50 +0000 (UTC) Received: from DB8EHSMHS028.bigfish.com (unknown [10.174.8.236]) by mail38-db8.bigfish.com (Postfix) with ESMTP id 09E8CC00047; Thu, 19 Sep 2013 15:14:50 +0000 (UTC) Received: from SJ-ITEXEDGE02.altera.priv.altera.com (66.35.236.232) by DB8EHSMHS028.bigfish.com (10.174.4.38) with Microsoft SMTP Server (TLS) id 14.16.227.3; Thu, 19 Sep 2013 15:14:49 +0000 Received: from sj-mail01.altera.com (137.57.1.6) by SJ-ITEXEDGE02.altera.priv.altera.com (66.35.236.232) with Microsoft SMTP Server id 8.3.327.1; Thu, 19 Sep 2013 08:03:40 -0700 Received: from clsee-VirtualBox.altera.com (tx-clsee-530.altera.priv.altera.com [137.57.188.103]) by sj-mail01.altera.com (8.13.7+Sun/8.13.7) with ESMTP id r8JFEfsX028206; Thu, 19 Sep 2013 08:14:46 -0700 (PDT) From: Chin Liang See To: ZY - u-boot Date: Thu, 19 Sep 2013 10:14:12 -0500 Message-ID: <1379603653-5524-1-git-send-email-clsee@altera.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-OriginatorOrg: altera.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% Cc: Machek , Chin Liang See , Pavel@theia.denx.de Subject: [U-Boot] [PATCH v2] socfpga: Adding Freeze Controller driver X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.11 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: u-boot-bounces@lists.denx.de Errors-To: u-boot-bounces@lists.denx.de Adding Freeze Controller driver. All HPS IOs need to be in freeze state during pin mux or IO buffer configuration. It is to avoid any glitch which might happen during the configuration from propagating to external devices. Signed-off-by: Chin Liang See Cc: Wolfgang Denk CC: Pavel Machek Cc: Dinh Nguyen --- Changes for v2 - Removed FREEZE_CONTROLLER_FSM_HW - Removed the get_timer_count_masked and convert to use delay in us - Used shorter local variables --- arch/arm/cpu/armv7/socfpga/Makefile | 2 +- arch/arm/cpu/armv7/socfpga/freeze_controller.c | 249 ++++++++++++++++++++ arch/arm/cpu/armv7/socfpga/spl.c | 16 ++ .../include/asm/arch-socfpga/freeze_controller.h | 71 ++++++ 4 files changed, 337 insertions(+), 1 deletion(-) create mode 100644 arch/arm/cpu/armv7/socfpga/freeze_controller.c create mode 100644 arch/arm/include/asm/arch-socfpga/freeze_controller.h diff --git a/arch/arm/cpu/armv7/socfpga/Makefile b/arch/arm/cpu/armv7/socfpga/Makefile index 0859e44..10d20f2 100644 --- a/arch/arm/cpu/armv7/socfpga/Makefile +++ b/arch/arm/cpu/armv7/socfpga/Makefile @@ -14,7 +14,7 @@ LIB = $(obj)lib$(SOC).o SOBJS := lowlevel_init.o COBJS-y := misc.o timer.o reset_manager.o system_manager.o -COBJS-$(CONFIG_SPL_BUILD) += spl.o +COBJS-$(CONFIG_SPL_BUILD) += spl.o freeze_controller.o COBJS := $(COBJS-y) SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/socfpga/freeze_controller.c b/arch/arm/cpu/armv7/socfpga/freeze_controller.c new file mode 100644 index 0000000..668c6d6 --- /dev/null +++ b/arch/arm/cpu/armv7/socfpga/freeze_controller.c @@ -0,0 +1,249 @@ +/* + * Copyright (C) 2013 Altera Corporation + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include +#include +#include +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + + + +static const struct socfpga_freeze_controller *freeze_controller_base = + (void *)(SOCFPGA_SYSMGR_ADDRESS + SYSMGR_FRZCTRL_ADDRESS); + +/* + * Default state from cold reset is FREEZE_ALL; the global + * flag is set to TRUE to indicate the IO banks are frozen + */ +static uint32_t frzctrl_channel_freeze[FREEZE_CHANNEL_NUM] + = { FREEZE_CTRL_FROZEN, FREEZE_CTRL_FROZEN, + FREEZE_CTRL_FROZEN, FREEZE_CTRL_FROZEN}; + + +/* Freeze HPS IOs */ +u32 sys_mgr_frzctrl_freeze_req(FreezeChannelSelect channel_id, + FreezeControllerFSMSelect fsm_select) +{ + u32 ioctrl_reg_offset; + u32 reg_value; + u32 reg_cfg_mask; + + if (FREEZE_CONTROLLER_FSM_SW != fsm_select) + return -EINVAL; + + /* select software FSM */ + writel(SYSMGR_FRZCTRL_SRC_VIO1_ENUM_SW, &freeze_controller_base->src); + + /* Freeze channel ID checking and base address */ + switch (channel_id) { + case FREEZE_CHANNEL_0: + case FREEZE_CHANNEL_1: + case FREEZE_CHANNEL_2: + ioctrl_reg_offset = (u32)( + &freeze_controller_base->vioctrl + + (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT)); + + /* + * Assert active low enrnsl, plniotri + * and niotri signals + */ + reg_cfg_mask = + SYSMGR_FRZCTRL_VIOCTRL_SLEW_MASK + | SYSMGR_FRZCTRL_VIOCTRL_WKPULLUP_MASK + | SYSMGR_FRZCTRL_VIOCTRL_TRISTATE_MASK; + clrbits_le32(ioctrl_reg_offset, reg_cfg_mask); + + /* + * Note: Delay for 20ns at min + * Assert active low bhniotri signal and de-assert + * active high csrdone + */ + reg_cfg_mask + = SYSMGR_FRZCTRL_VIOCTRL_BUSHOLD_MASK + | SYSMGR_FRZCTRL_VIOCTRL_CFG_MASK; + clrbits_le32(ioctrl_reg_offset, reg_cfg_mask); + + /* Set global flag to indicate channel is frozen */ + frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_FROZEN; + break; + + case FREEZE_CHANNEL_3: + /* + * Assert active low enrnsl, plniotri and + * niotri signals + */ + reg_cfg_mask + = SYSMGR_FRZCTRL_HIOCTRL_SLEW_MASK + | SYSMGR_FRZCTRL_HIOCTRL_WKPULLUP_MASK + | SYSMGR_FRZCTRL_HIOCTRL_TRISTATE_MASK; + clrbits_le32(&freeze_controller_base->hioctrl, reg_cfg_mask); + + /* + * Note: Delay for 40ns at min + * assert active low bhniotri & nfrzdrv signals, + * de-assert active high csrdone and assert + * active high frzreg and nfrzdrv signals + */ + reg_value = readl(&freeze_controller_base->hioctrl); + reg_cfg_mask + = SYSMGR_FRZCTRL_HIOCTRL_BUSHOLD_MASK + | SYSMGR_FRZCTRL_HIOCTRL_CFG_MASK; + reg_value + = (reg_value & ~reg_cfg_mask) + | SYSMGR_FRZCTRL_HIOCTRL_REGRST_MASK + | SYSMGR_FRZCTRL_HIOCTRL_OCTRST_MASK; + writel(reg_value, &freeze_controller_base->hioctrl); + + /* + * Note: Delay for 40ns at min + * assert active high reinit signal and de-assert + * active high pllbiasen signals + */ + reg_value = readl(&freeze_controller_base->hioctrl); + reg_value + = (reg_value & + ~SYSMGR_FRZCTRL_HIOCTRL_OCT_CFGEN_CALSTART_MASK) + | SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK; + writel(reg_value, &freeze_controller_base->hioctrl); + + /* Set global flag to indicate channel is frozen */ + frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_FROZEN; + break; + + default: + return -EINVAL; + } + + return 0; +} + +/* Unfreeze/Thaw HPS IOs */ +u32 sys_mgr_frzctrl_thaw_req(FreezeChannelSelect channel_id, + FreezeControllerFSMSelect fsm_select) +{ + u32 ioctrl_reg_offset; + u32 reg_cfg_mask; + u32 reg_value; + + if (FREEZE_CONTROLLER_FSM_SW != fsm_select) + return -EINVAL; + + /* select software FSM */ + writel(SYSMGR_FRZCTRL_SRC_VIO1_ENUM_SW, &freeze_controller_base->src); + + /* Freeze channel ID checking and base address */ + switch (channel_id) { + case FREEZE_CHANNEL_0: + case FREEZE_CHANNEL_1: + case FREEZE_CHANNEL_2: + ioctrl_reg_offset + = (u32)(&freeze_controller_base->vioctrl + + (channel_id << SYSMGR_FRZCTRL_VIOCTRL_SHIFT)); + + /* + * Assert active low bhniotri signal and + * de-assert active high csrdone + */ + reg_cfg_mask + = SYSMGR_FRZCTRL_VIOCTRL_BUSHOLD_MASK + | SYSMGR_FRZCTRL_VIOCTRL_CFG_MASK; + setbits_le32(ioctrl_reg_offset, reg_cfg_mask); + + /* + * Note: Delay for 20ns at min + * de-assert active low plniotri and niotri signals + */ + reg_cfg_mask + = SYSMGR_FRZCTRL_VIOCTRL_WKPULLUP_MASK + | SYSMGR_FRZCTRL_VIOCTRL_TRISTATE_MASK; + setbits_le32(ioctrl_reg_offset, reg_cfg_mask); + + /* + * Note: Delay for 20ns at min + * de-assert active low enrnsl signal + */ + setbits_le32(ioctrl_reg_offset, + SYSMGR_FRZCTRL_VIOCTRL_SLEW_MASK); + + /* Set global flag to indicate channel is thawed */ + frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_THAWED; + + break; + + case FREEZE_CHANNEL_3: + /* de-assert active high reinit signal */ + clrbits_le32(&freeze_controller_base->hioctrl, + SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK); + + /* + * Note: Delay for 40ns at min + * assert active high pllbiasen signals + */ + setbits_le32(&freeze_controller_base->hioctrl, + SYSMGR_FRZCTRL_HIOCTRL_OCT_CFGEN_CALSTART_MASK); + + /* + * Delay 1000 intosc. intosc is based on eosc1 + * Use worst case which is fatest eosc1=50MHz, delay required + * is 1/50MHz * 1000 = 20us + */ + udelay(20); + + /* + * de-assert active low bhniotri signals, + * assert active high csrdone and nfrzdrv signal + */ + reg_value = readl(&freeze_controller_base->hioctrl); + reg_value = (reg_value + | SYSMGR_FRZCTRL_HIOCTRL_BUSHOLD_MASK + | SYSMGR_FRZCTRL_HIOCTRL_CFG_MASK) + & ~SYSMGR_FRZCTRL_HIOCTRL_OCTRST_MASK; + writel(reg_value, &freeze_controller_base->hioctrl); + + /* + * Delay 33 intosc + * Use worst case which is fatest eosc1=50MHz, delay required + * is 1/50MHz * 33 = 660ns ~= 1us + */ + udelay(1); + + /* de-assert active low plniotri and niotri signals */ + reg_cfg_mask + = SYSMGR_FRZCTRL_HIOCTRL_WKPULLUP_MASK + | SYSMGR_FRZCTRL_HIOCTRL_TRISTATE_MASK; + + setbits_le32(&freeze_controller_base->hioctrl, reg_cfg_mask); + + /* + * Note: Delay for 40ns at min + * de-assert active high frzreg signal + */ + clrbits_le32(&freeze_controller_base->hioctrl, + SYSMGR_FRZCTRL_HIOCTRL_REGRST_MASK); + + /* + * Note: Delay for 40ns at min + * de-assert active low enrnsl signal + */ + setbits_le32(&freeze_controller_base->hioctrl, + SYSMGR_FRZCTRL_HIOCTRL_SLEW_MASK); + + /* Set global flag to indicate channel is thawed */ + frzctrl_channel_freeze[channel_id] = FREEZE_CTRL_THAWED; + + break; + + default: + return -EINVAL; + } + + return 0; +} + diff --git a/arch/arm/cpu/armv7/socfpga/spl.c b/arch/arm/cpu/armv7/socfpga/spl.c index 74bceab..5173c0d 100644 --- a/arch/arm/cpu/armv7/socfpga/spl.c +++ b/arch/arm/cpu/armv7/socfpga/spl.c @@ -13,6 +13,8 @@ #include #include #include +#include + DECLARE_GLOBAL_DATA_PTR; @@ -27,6 +29,13 @@ u32 spl_boot_device(void) void spl_board_init(void) { #ifndef CONFIG_SOCFPGA_VIRTUAL_TARGET + debug("Freezing all I/O banks\n"); + /* freeze all IO banks */ + sys_mgr_frzctrl_freeze_req(FREEZE_CHANNEL_0, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_freeze_req(FREEZE_CHANNEL_1, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_freeze_req(FREEZE_CHANNEL_2, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_freeze_req(FREEZE_CHANNEL_3, FREEZE_CONTROLLER_FSM_SW); + /* configure the pin muxing through system manager */ sysmgr_pinmux_init(); #endif /* CONFIG_SOCFPGA_VIRTUAL_TARGET */ @@ -34,6 +43,13 @@ void spl_board_init(void) /* de-assert reset for peripherals and bridges based on handoff */ reset_deassert_peripherals_handoff(); + debug("Unfreezing/Thaw all I/O banks\n"); + /* unfreeze / thaw all IO banks */ + sys_mgr_frzctrl_thaw_req(FREEZE_CHANNEL_0, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_thaw_req(FREEZE_CHANNEL_1, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_thaw_req(FREEZE_CHANNEL_2, FREEZE_CONTROLLER_FSM_SW); + sys_mgr_frzctrl_thaw_req(FREEZE_CHANNEL_3, FREEZE_CONTROLLER_FSM_SW); + /* enable console uart printing */ preloader_console_init(); } diff --git a/arch/arm/include/asm/arch-socfpga/freeze_controller.h b/arch/arm/include/asm/arch-socfpga/freeze_controller.h new file mode 100644 index 0000000..b25ff99 --- /dev/null +++ b/arch/arm/include/asm/arch-socfpga/freeze_controller.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2013 Altera Corporation + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _FREEZE_CONTROLLER_H_ +#define _FREEZE_CONTROLLER_H_ + +struct socfpga_freeze_controller { + u32 vioctrl; + u32 padding[3]; + u32 hioctrl; + u32 src; + u32 hwctrl; +}; + +#define SYSMGR_FRZCTRL_LOOP_PARAM (1000) +#define SYSMGR_FRZCTRL_DELAY_LOOP_PARAM (10) +#define SYSMGR_FRZCTRL_INTOSC_33 (33) +#define SYSMGR_FRZCTRL_INTOSC_1000 (1000) +#define FREEZE_CHANNEL_NUM (4) + +typedef enum { + FREEZE_CTRL_FROZEN = 0, + FREEZE_CTRL_THAWED = 1 +} FREEZE_CTRL_CHAN_STATE; + +typedef enum { + FREEZE_CHANNEL_0 = 0, /* EMAC_IO & MIXED2_IO */ + FREEZE_CHANNEL_1, /* MIXED1_IO and FLASH_IO */ + FREEZE_CHANNEL_2, /* General IO */ + FREEZE_CHANNEL_3, /* DDR IO */ + FREEZE_CHANNEL_UNDEFINED +} FreezeChannelSelect; + +typedef enum { + FREEZE_CONTROLLER_FSM_SW = 0, + FREEZE_CONTROLLER_FSM_HW, + FREEZE_CONTROLLER_FSM_UNDEFINED +} FreezeControllerFSMSelect; + +#define SYSMGR_FRZCTRL_ADDRESS 0x40 +#define SYSMGR_FRZCTRL_SRC_VIO1_ENUM_SW 0x0 +#define SYSMGR_FRZCTRL_SRC_VIO1_ENUM_HW 0x1 +#define SYSMGR_FRZCTRL_VIOCTRL_SLEW_MASK 0x00000010 +#define SYSMGR_FRZCTRL_VIOCTRL_WKPULLUP_MASK 0x00000008 +#define SYSMGR_FRZCTRL_VIOCTRL_TRISTATE_MASK 0x00000004 +#define SYSMGR_FRZCTRL_VIOCTRL_BUSHOLD_MASK 0x00000002 +#define SYSMGR_FRZCTRL_VIOCTRL_CFG_MASK 0x00000001 +#define SYSMGR_FRZCTRL_HIOCTRL_SLEW_MASK 0x00000010 +#define SYSMGR_FRZCTRL_HIOCTRL_WKPULLUP_MASK 0x00000008 +#define SYSMGR_FRZCTRL_HIOCTRL_TRISTATE_MASK 0x00000004 +#define SYSMGR_FRZCTRL_HIOCTRL_BUSHOLD_MASK 0x00000002 +#define SYSMGR_FRZCTRL_HIOCTRL_CFG_MASK 0x00000001 +#define SYSMGR_FRZCTRL_HIOCTRL_REGRST_MASK 0x00000080 +#define SYSMGR_FRZCTRL_HIOCTRL_OCTRST_MASK 0x00000040 +#define SYSMGR_FRZCTRL_HIOCTRL_OCT_CFGEN_CALSTART_MASK 0x00000100 +#define SYSMGR_FRZCTRL_HIOCTRL_DLLRST_MASK 0x00000020 +#define SYSMGR_FRZCTRL_HWCTRL_VIO1REQ_MASK 0x00000001 +#define SYSMGR_FRZCTRL_HWCTRL_VIO1STATE_ENUM_FROZEN 0x2 +#define SYSMGR_FRZCTRL_HWCTRL_VIO1STATE_ENUM_THAWED 0x1 +#define SYSMGR_FRZCTRL_HWCTRL_VIO1STATE_GET(x) (((x) & 0x00000006) >> 1) +#define SYSMGR_FRZCTRL_VIOCTRL_SHIFT 0x2 + +u32 sys_mgr_frzctrl_freeze_req(FreezeChannelSelect channel_id, + FreezeControllerFSMSelect fsm_select); +u32 sys_mgr_frzctrl_thaw_req(FreezeChannelSelect channel_id, + FreezeControllerFSMSelect fsm_select); + +#endif /* _FREEZE_CONTROLLER_H_ */