From mboxrd@z Thu Jan 1 00:00:00 1970 From: shawn.guo@freescale.com (Shawn Guo) Date: Fri, 26 Nov 2010 14:49:07 +0800 Subject: [PATCH 08/15] ARM: mxs: Add iomux support In-Reply-To: <1290754154-9428-1-git-send-email-shawn.guo@freescale.com> References: <1290754154-9428-1-git-send-email-shawn.guo@freescale.com> Message-ID: <1290754154-9428-9-git-send-email-shawn.guo@freescale.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org MXS-based SoCs implements iomux functions in block PINCTRL. Signed-off-by: Shawn Guo --- arch/arm/mach-mxs/include/mach/iomux-mx23.h | 29 +++++++ arch/arm/mach-mxs/include/mach/iomux-mx28.h | 44 +++++++++++ arch/arm/mach-mxs/include/mach/iomux.h | 77 +++++++++++++++++++ arch/arm/mach-mxs/iomux.c | 110 +++++++++++++++++++++++++++ 4 files changed, 260 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-mxs/include/mach/iomux-mx23.h create mode 100644 arch/arm/mach-mxs/include/mach/iomux-mx28.h create mode 100644 arch/arm/mach-mxs/include/mach/iomux.h create mode 100644 arch/arm/mach-mxs/iomux.c diff --git a/arch/arm/mach-mxs/include/mach/iomux-mx23.h b/arch/arm/mach-mxs/include/mach/iomux-mx23.h new file mode 100644 index 0000000..3fc0439 --- /dev/null +++ b/arch/arm/mach-mxs/include/mach/iomux-mx23.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) 2009-2010 Amit Kucheria + * Copyright (C) 2010 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __MACH_IOMUX_MX23_H__ +#define __MACH_IOMUX_MX23_H__ + +#include + +/* + * The naming convention for the pad modes is MX23_PAD___ + * If or refers to a GPIO, it is named GPIO__ + * See also iomux.h + * + * BANK PIN MUX VOL MA PULL + */ +/* DUART */ +#define MX23_PAD_PWM0__DUART_RX IOMUX_PAD(1, 26, PAD_MUXSEL_2, PAD_VOL_NONE, PAD_4MA, PAD_NOPULL) +#define MX23_PAD_PWM1__DUART_TX IOMUX_PAD(1, 27, PAD_MUXSEL_2, PAD_VOL_NONE, PAD_4MA, PAD_NOPULL) + +#endif /* __MACH_IOMUX_MX23_H__ */ diff --git a/arch/arm/mach-mxs/include/mach/iomux-mx28.h b/arch/arm/mach-mxs/include/mach/iomux-mx28.h new file mode 100644 index 0000000..ca37a15 --- /dev/null +++ b/arch/arm/mach-mxs/include/mach/iomux-mx28.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2009-2010 Amit Kucheria + * Copyright (C) 2010 Freescale Semiconductor, Inc. + * + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __MACH_IOMUX_MX28_H__ +#define __MACH_IOMUX_MX28_H__ + +#include + +/* + * The naming convention for the pad modes is MX28_PAD___ + * If or refers to a GPIO, it is named GPIO__ + * See also iomux.h + * + * BANK PIN MUX VOL MA PULL + */ +/* DUART */ +#define MX28_PAD_PWM0__DUART_RX IOMUX_PAD(3, 16, PAD_MUXSEL_2, PAD_3V3, PAD_4MA, PAD_NOPULL) +#define MX28_PAD_PWM1__DUART_TX IOMUX_PAD(3, 17, PAD_MUXSEL_2, PAD_3V3, PAD_4MA, PAD_NOPULL) + +/* FEC */ +#define MX28_PAD_ENET0_MDC__ENET0_MDC IOMUX_PAD(4, 0, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_MDIO__ENET0_MDIO IOMUX_PAD(4, 1, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_RX_EN__ENET0_RX_EN IOMUX_PAD(4, 2, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_RXD0__ENET0_RXD0 IOMUX_PAD(4, 3, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_RXD1__ENET0_RXD1 IOMUX_PAD(4, 4, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_TX_EN__ENET0_TX_EN IOMUX_PAD(4, 6, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_TXD0__ENET0_TXD0 IOMUX_PAD(4, 7, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET0_TXD1__ENET0_TXD1 IOMUX_PAD(4, 8, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) +#define MX28_PAD_ENET_CLK__ENET_CLK IOMUX_PAD(4, 16, PAD_MUXSEL_0, PAD_3V3, PAD_8MA, PAD_PULL) + +/* GPIO */ +#define MX28_PAD_SSP1_DATA3__GPIO_2_15 IOMUX_PAD(2, 15, PAD_MUXSEL_GPIO, PAD_3V3, PAD_4MA, PAD_NOPULL) +#define MX28_PAD_ENET0_RX_CLK__GPIO_4_13 IOMUX_PAD(4, 13, PAD_MUXSEL_GPIO, PAD_3V3, PAD_4MA, PAD_NOPULL) + +#endif /* __MACH_IOMUX_MX28_H__ */ diff --git a/arch/arm/mach-mxs/include/mach/iomux.h b/arch/arm/mach-mxs/include/mach/iomux.h new file mode 100644 index 0000000..27bcada --- /dev/null +++ b/arch/arm/mach-mxs/include/mach/iomux.h @@ -0,0 +1,77 @@ +/* + * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, + * + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * 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., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#ifndef __MACH_MXS_IOMUX_H__ +#define __MACH_MXS_IOMUX_H__ + +typedef struct pad_desc { + unsigned bank:3; + unsigned pin:5; + unsigned muxsel:2; + unsigned ma:3; + unsigned vol:2; + unsigned pull:1; +} iomux_cfg_t; + +#define IOMUX_PAD(_bank, _pin, _muxsel, _vol, _ma, _pull) \ + { \ + .bank = _bank, \ + .pin = _pin, \ + .muxsel = _muxsel, \ + .vol = _vol, \ + .ma = _ma, \ + .pull = _pull, \ + } + +#define PAD_MUXSEL_0 0 +#define PAD_MUXSEL_1 1 +#define PAD_MUXSEL_2 2 +#define PAD_MUXSEL_GPIO 3 + +#define PAD_1V8 0 +#define PAD_3V3 1 +#define PAD_VOL_NONE 2 + +#define PAD_4MA 0 +#define PAD_8MA 1 +#define PAD_12MA 2 +#define PAD_16MA 3 +#define PAD_MA_NONE 4 + +#define PAD_NOPULL 0 +#define PAD_PULL 1 + +/* + * setups a single pad in the iomuxer + */ +int mxs_iomux_setup_pad(iomux_cfg_t *pad); + +/* + * setups multiple pads + * convenient way to call the above function with tables + */ +int mxs_iomux_setup_multiple_pads(iomux_cfg_t *pad_list, unsigned count); + +/* + * Initialise the iomux controller + */ +void mxs_iomux_init(void __iomem *iomux_base); + +#endif /* __MACH_MXS_IOMUX_H__*/ diff --git a/arch/arm/mach-mxs/iomux.c b/arch/arm/mach-mxs/iomux.c new file mode 100644 index 0000000..803cadf --- /dev/null +++ b/arch/arm/mach-mxs/iomux.c @@ -0,0 +1,110 @@ +/* + * Copyright 2004-2006,2010 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2008 by Sascha Hauer + * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, + * + * + * 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., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#include +#include + +static void __iomem *base; + +/* + * configures a single pad in the iomuxer + */ +int mxs_iomux_setup_pad(iomux_cfg_t *pad) +{ + u32 reg, ofs, bp, bm; + + /* muxsel */ + ofs = pad->bank * 0x20 + pad->pin / 16 * 0x10; + bp = pad->pin % 16 * 2; + bm = 0x3 << bp; + reg = __raw_readl(base + ofs); + reg &= ~bm; + reg |= pad->muxsel << bp; + __raw_writel(reg, base + ofs); + + /* drive */ + ofs = cpu_is_mx23() ? 0x200 : 0x300; + ofs += pad->bank * 0x40 + pad->pin / 8 * 0x10; + /* ma */ + if (pad->ma != PAD_MA_NONE) + { + bp = pad->pin % 8 * 4; + bm = 0x3 << bp; + reg = __raw_readl(base + ofs); + reg &= ~bm; + reg |= pad->ma << bp; + __raw_writel(reg, base + ofs); + } + /* vol */ + if (pad->vol != PAD_VOL_NONE) + { + bp = pad->pin % 8 * 4 + 2; + bm = 0x1 << bp; + reg = __raw_readl(base + ofs); + reg &= ~bm; + reg |= pad->vol << bp; + __raw_writel(reg, base + ofs); + } + + /* pull */ + ofs = cpu_is_mx23() ? 0x400 : 0x600; + ofs += pad->bank * 0x10; + bp = pad->pin; + bm = 0x1 << bp; + reg = __raw_readl(base + ofs); + reg &= ~bm; + reg |= pad->pull << bp; + __raw_writel(reg, base + ofs); + + return 0; +} +EXPORT_SYMBOL(mxs_iomux_setup_pad); + +int mxs_iomux_setup_multiple_pads(iomux_cfg_t *pad_list, unsigned count) +{ + iomux_cfg_t *p = pad_list; + int i; + int ret; + + for (i = 0; i < count; i++) { + ret = mxs_iomux_setup_pad(p); + if (ret) + return ret; + p++; + } + + return 0; +} +EXPORT_SYMBOL(mxs_iomux_setup_multiple_pads); + +void mxs_iomux_init(void __iomem *iomux_base) +{ + base = iomux_base; +} -- 1.7.1