1012 lines
26 KiB
C
1012 lines
26 KiB
C
/*
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* linux/arch/arm/mach-omap2/mux.c
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*
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* OMAP2 and OMAP3 pin multiplexing configurations
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*
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* Copyright (C) 2004 - 2008 Texas Instruments Inc.
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* Copyright (C) 2003 - 2008 Nokia Corporation
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*
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* Written by Tony Lindgren
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <asm/system.h>
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#include <plat/control.h>
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#include <plat/mux.h>
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#include "mux.h"
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#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
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#define OMAP_MUX_BASE_SZ 0x5ca
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struct omap_mux_entry {
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struct omap_mux mux;
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struct list_head node;
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};
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static unsigned long mux_phys;
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static void __iomem *mux_base;
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static inline u16 omap_mux_read(u16 reg)
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{
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if (cpu_is_omap24xx())
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return __raw_readb(mux_base + reg);
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else
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return __raw_readw(mux_base + reg);
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}
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static inline void omap_mux_write(u16 val, u16 reg)
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{
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if (cpu_is_omap24xx())
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__raw_writeb(val, mux_base + reg);
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else
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__raw_writew(val, mux_base + reg);
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}
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#if defined(CONFIG_ARCH_OMAP24XX) && defined(CONFIG_OMAP_MUX)
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static struct omap_mux_cfg arch_mux_cfg;
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/* NOTE: See mux.h for the enumeration */
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static struct pin_config __initdata_or_module omap24xx_pins[] = {
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/*
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* description mux mux pull pull debug
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* offset mode ena type
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*/
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/* 24xx I2C */
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MUX_CFG_24XX("M19_24XX_I2C1_SCL", 0x111, 0, 0, 0, 1)
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MUX_CFG_24XX("L15_24XX_I2C1_SDA", 0x112, 0, 0, 0, 1)
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MUX_CFG_24XX("J15_24XX_I2C2_SCL", 0x113, 0, 0, 1, 1)
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MUX_CFG_24XX("H19_24XX_I2C2_SDA", 0x114, 0, 0, 0, 1)
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/* Menelaus interrupt */
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MUX_CFG_24XX("W19_24XX_SYS_NIRQ", 0x12c, 0, 1, 1, 1)
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/* 24xx clocks */
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MUX_CFG_24XX("W14_24XX_SYS_CLKOUT", 0x137, 0, 1, 1, 1)
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/* 24xx GPMC chipselects, wait pin monitoring */
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MUX_CFG_24XX("E2_GPMC_NCS2", 0x08e, 0, 1, 1, 1)
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MUX_CFG_24XX("L2_GPMC_NCS7", 0x093, 0, 1, 1, 1)
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MUX_CFG_24XX("L3_GPMC_WAIT0", 0x09a, 0, 1, 1, 1)
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MUX_CFG_24XX("N7_GPMC_WAIT1", 0x09b, 0, 1, 1, 1)
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MUX_CFG_24XX("M1_GPMC_WAIT2", 0x09c, 0, 1, 1, 1)
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MUX_CFG_24XX("P1_GPMC_WAIT3", 0x09d, 0, 1, 1, 1)
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/* 24xx McBSP */
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MUX_CFG_24XX("Y15_24XX_MCBSP2_CLKX", 0x124, 1, 1, 0, 1)
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MUX_CFG_24XX("R14_24XX_MCBSP2_FSX", 0x125, 1, 1, 0, 1)
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MUX_CFG_24XX("W15_24XX_MCBSP2_DR", 0x126, 1, 1, 0, 1)
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MUX_CFG_24XX("V15_24XX_MCBSP2_DX", 0x127, 1, 1, 0, 1)
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/* 24xx GPIO */
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MUX_CFG_24XX("M21_242X_GPIO11", 0x0c9, 3, 1, 1, 1)
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MUX_CFG_24XX("P21_242X_GPIO12", 0x0ca, 3, 0, 0, 1)
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MUX_CFG_24XX("AA10_242X_GPIO13", 0x0e5, 3, 0, 0, 1)
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MUX_CFG_24XX("AA6_242X_GPIO14", 0x0e6, 3, 0, 0, 1)
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MUX_CFG_24XX("AA4_242X_GPIO15", 0x0e7, 3, 0, 0, 1)
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MUX_CFG_24XX("Y11_242X_GPIO16", 0x0e8, 3, 0, 0, 1)
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MUX_CFG_24XX("AA12_242X_GPIO17", 0x0e9, 3, 0, 0, 1)
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MUX_CFG_24XX("AA8_242X_GPIO58", 0x0ea, 3, 0, 0, 1)
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MUX_CFG_24XX("Y20_24XX_GPIO60", 0x12c, 3, 0, 0, 1)
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MUX_CFG_24XX("W4__24XX_GPIO74", 0x0f2, 3, 0, 0, 1)
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MUX_CFG_24XX("N15_24XX_GPIO85", 0x103, 3, 0, 0, 1)
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MUX_CFG_24XX("M15_24XX_GPIO92", 0x10a, 3, 0, 0, 1)
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MUX_CFG_24XX("P20_24XX_GPIO93", 0x10b, 3, 0, 0, 1)
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MUX_CFG_24XX("P18_24XX_GPIO95", 0x10d, 3, 0, 0, 1)
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MUX_CFG_24XX("M18_24XX_GPIO96", 0x10e, 3, 0, 0, 1)
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MUX_CFG_24XX("L14_24XX_GPIO97", 0x10f, 3, 0, 0, 1)
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MUX_CFG_24XX("J15_24XX_GPIO99", 0x113, 3, 1, 1, 1)
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MUX_CFG_24XX("V14_24XX_GPIO117", 0x128, 3, 1, 0, 1)
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MUX_CFG_24XX("P14_24XX_GPIO125", 0x140, 3, 1, 1, 1)
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/* 242x DBG GPIO */
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MUX_CFG_24XX("V4_242X_GPIO49", 0xd3, 3, 0, 0, 1)
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MUX_CFG_24XX("W2_242X_GPIO50", 0xd4, 3, 0, 0, 1)
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MUX_CFG_24XX("U4_242X_GPIO51", 0xd5, 3, 0, 0, 1)
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MUX_CFG_24XX("V3_242X_GPIO52", 0xd6, 3, 0, 0, 1)
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MUX_CFG_24XX("V2_242X_GPIO53", 0xd7, 3, 0, 0, 1)
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MUX_CFG_24XX("V6_242X_GPIO53", 0xcf, 3, 0, 0, 1)
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MUX_CFG_24XX("T4_242X_GPIO54", 0xd8, 3, 0, 0, 1)
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MUX_CFG_24XX("Y4_242X_GPIO54", 0xd0, 3, 0, 0, 1)
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MUX_CFG_24XX("T3_242X_GPIO55", 0xd9, 3, 0, 0, 1)
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MUX_CFG_24XX("U2_242X_GPIO56", 0xda, 3, 0, 0, 1)
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/* 24xx external DMA requests */
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MUX_CFG_24XX("AA10_242X_DMAREQ0", 0x0e5, 2, 0, 0, 1)
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MUX_CFG_24XX("AA6_242X_DMAREQ1", 0x0e6, 2, 0, 0, 1)
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MUX_CFG_24XX("E4_242X_DMAREQ2", 0x074, 2, 0, 0, 1)
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MUX_CFG_24XX("G4_242X_DMAREQ3", 0x073, 2, 0, 0, 1)
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MUX_CFG_24XX("D3_242X_DMAREQ4", 0x072, 2, 0, 0, 1)
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MUX_CFG_24XX("E3_242X_DMAREQ5", 0x071, 2, 0, 0, 1)
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/* UART3 */
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MUX_CFG_24XX("K15_24XX_UART3_TX", 0x118, 0, 0, 0, 1)
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MUX_CFG_24XX("K14_24XX_UART3_RX", 0x119, 0, 0, 0, 1)
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/* MMC/SDIO */
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MUX_CFG_24XX("G19_24XX_MMC_CLKO", 0x0f3, 0, 0, 0, 1)
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MUX_CFG_24XX("H18_24XX_MMC_CMD", 0x0f4, 0, 0, 0, 1)
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MUX_CFG_24XX("F20_24XX_MMC_DAT0", 0x0f5, 0, 0, 0, 1)
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MUX_CFG_24XX("H14_24XX_MMC_DAT1", 0x0f6, 0, 0, 0, 1)
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MUX_CFG_24XX("E19_24XX_MMC_DAT2", 0x0f7, 0, 0, 0, 1)
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MUX_CFG_24XX("D19_24XX_MMC_DAT3", 0x0f8, 0, 0, 0, 1)
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MUX_CFG_24XX("F19_24XX_MMC_DAT_DIR0", 0x0f9, 0, 0, 0, 1)
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MUX_CFG_24XX("E20_24XX_MMC_DAT_DIR1", 0x0fa, 0, 0, 0, 1)
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MUX_CFG_24XX("F18_24XX_MMC_DAT_DIR2", 0x0fb, 0, 0, 0, 1)
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MUX_CFG_24XX("E18_24XX_MMC_DAT_DIR3", 0x0fc, 0, 0, 0, 1)
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MUX_CFG_24XX("G18_24XX_MMC_CMD_DIR", 0x0fd, 0, 0, 0, 1)
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MUX_CFG_24XX("H15_24XX_MMC_CLKI", 0x0fe, 0, 0, 0, 1)
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/* Full speed USB */
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MUX_CFG_24XX("J20_24XX_USB0_PUEN", 0x11d, 0, 0, 0, 1)
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MUX_CFG_24XX("J19_24XX_USB0_VP", 0x11e, 0, 0, 0, 1)
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MUX_CFG_24XX("K20_24XX_USB0_VM", 0x11f, 0, 0, 0, 1)
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MUX_CFG_24XX("J18_24XX_USB0_RCV", 0x120, 0, 0, 0, 1)
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MUX_CFG_24XX("K19_24XX_USB0_TXEN", 0x121, 0, 0, 0, 1)
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MUX_CFG_24XX("J14_24XX_USB0_SE0", 0x122, 0, 0, 0, 1)
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MUX_CFG_24XX("K18_24XX_USB0_DAT", 0x123, 0, 0, 0, 1)
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MUX_CFG_24XX("N14_24XX_USB1_SE0", 0x0ed, 2, 0, 0, 1)
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MUX_CFG_24XX("W12_24XX_USB1_SE0", 0x0dd, 3, 0, 0, 1)
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MUX_CFG_24XX("P15_24XX_USB1_DAT", 0x0ee, 2, 0, 0, 1)
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MUX_CFG_24XX("R13_24XX_USB1_DAT", 0x0e0, 3, 0, 0, 1)
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MUX_CFG_24XX("W20_24XX_USB1_TXEN", 0x0ec, 2, 0, 0, 1)
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MUX_CFG_24XX("P13_24XX_USB1_TXEN", 0x0df, 3, 0, 0, 1)
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MUX_CFG_24XX("V19_24XX_USB1_RCV", 0x0eb, 2, 0, 0, 1)
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MUX_CFG_24XX("V12_24XX_USB1_RCV", 0x0de, 3, 0, 0, 1)
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MUX_CFG_24XX("AA10_24XX_USB2_SE0", 0x0e5, 2, 0, 0, 1)
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MUX_CFG_24XX("Y11_24XX_USB2_DAT", 0x0e8, 2, 0, 0, 1)
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MUX_CFG_24XX("AA12_24XX_USB2_TXEN", 0x0e9, 2, 0, 0, 1)
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MUX_CFG_24XX("AA6_24XX_USB2_RCV", 0x0e6, 2, 0, 0, 1)
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MUX_CFG_24XX("AA4_24XX_USB2_TLLSE0", 0x0e7, 2, 0, 0, 1)
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/* Keypad GPIO*/
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MUX_CFG_24XX("T19_24XX_KBR0", 0x106, 3, 1, 1, 1)
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MUX_CFG_24XX("R19_24XX_KBR1", 0x107, 3, 1, 1, 1)
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MUX_CFG_24XX("V18_24XX_KBR2", 0x139, 3, 1, 1, 1)
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MUX_CFG_24XX("M21_24XX_KBR3", 0xc9, 3, 1, 1, 1)
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MUX_CFG_24XX("E5__24XX_KBR4", 0x138, 3, 1, 1, 1)
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MUX_CFG_24XX("M18_24XX_KBR5", 0x10e, 3, 1, 1, 1)
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MUX_CFG_24XX("R20_24XX_KBC0", 0x108, 3, 0, 0, 1)
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MUX_CFG_24XX("M14_24XX_KBC1", 0x109, 3, 0, 0, 1)
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MUX_CFG_24XX("H19_24XX_KBC2", 0x114, 3, 0, 0, 1)
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MUX_CFG_24XX("V17_24XX_KBC3", 0x135, 3, 0, 0, 1)
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MUX_CFG_24XX("P21_24XX_KBC4", 0xca, 3, 0, 0, 1)
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MUX_CFG_24XX("L14_24XX_KBC5", 0x10f, 3, 0, 0, 1)
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MUX_CFG_24XX("N19_24XX_KBC6", 0x110, 3, 0, 0, 1)
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/* 24xx Menelaus Keypad GPIO */
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MUX_CFG_24XX("B3__24XX_KBR5", 0x30, 3, 1, 1, 1)
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MUX_CFG_24XX("AA4_24XX_KBC2", 0xe7, 3, 0, 0, 1)
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MUX_CFG_24XX("B13_24XX_KBC6", 0x110, 3, 0, 0, 1)
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/* 2430 USB */
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MUX_CFG_24XX("AD9_2430_USB0_PUEN", 0x133, 4, 0, 0, 1)
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MUX_CFG_24XX("Y11_2430_USB0_VP", 0x134, 4, 0, 0, 1)
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MUX_CFG_24XX("AD7_2430_USB0_VM", 0x135, 4, 0, 0, 1)
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MUX_CFG_24XX("AE7_2430_USB0_RCV", 0x136, 4, 0, 0, 1)
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MUX_CFG_24XX("AD4_2430_USB0_TXEN", 0x137, 4, 0, 0, 1)
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MUX_CFG_24XX("AF9_2430_USB0_SE0", 0x138, 4, 0, 0, 1)
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MUX_CFG_24XX("AE6_2430_USB0_DAT", 0x139, 4, 0, 0, 1)
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MUX_CFG_24XX("AD24_2430_USB1_SE0", 0x107, 2, 0, 0, 1)
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MUX_CFG_24XX("AB24_2430_USB1_RCV", 0x108, 2, 0, 0, 1)
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MUX_CFG_24XX("Y25_2430_USB1_TXEN", 0x109, 2, 0, 0, 1)
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MUX_CFG_24XX("AA26_2430_USB1_DAT", 0x10A, 2, 0, 0, 1)
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/* 2430 HS-USB */
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MUX_CFG_24XX("AD9_2430_USB0HS_DATA3", 0x133, 0, 0, 0, 1)
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MUX_CFG_24XX("Y11_2430_USB0HS_DATA4", 0x134, 0, 0, 0, 1)
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MUX_CFG_24XX("AD7_2430_USB0HS_DATA5", 0x135, 0, 0, 0, 1)
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MUX_CFG_24XX("AE7_2430_USB0HS_DATA6", 0x136, 0, 0, 0, 1)
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MUX_CFG_24XX("AD4_2430_USB0HS_DATA2", 0x137, 0, 0, 0, 1)
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MUX_CFG_24XX("AF9_2430_USB0HS_DATA0", 0x138, 0, 0, 0, 1)
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MUX_CFG_24XX("AE6_2430_USB0HS_DATA1", 0x139, 0, 0, 0, 1)
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MUX_CFG_24XX("AE8_2430_USB0HS_CLK", 0x13A, 0, 0, 0, 1)
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MUX_CFG_24XX("AD8_2430_USB0HS_DIR", 0x13B, 0, 0, 0, 1)
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MUX_CFG_24XX("AE5_2430_USB0HS_STP", 0x13c, 0, 1, 1, 1)
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MUX_CFG_24XX("AE9_2430_USB0HS_NXT", 0x13D, 0, 0, 0, 1)
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MUX_CFG_24XX("AC7_2430_USB0HS_DATA7", 0x13E, 0, 0, 0, 1)
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/* 2430 McBSP */
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MUX_CFG_24XX("AD6_2430_MCBSP_CLKS", 0x011E, 0, 0, 0, 1)
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MUX_CFG_24XX("AB2_2430_MCBSP1_CLKR", 0x011A, 0, 0, 0, 1)
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MUX_CFG_24XX("AD5_2430_MCBSP1_FSR", 0x011B, 0, 0, 0, 1)
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MUX_CFG_24XX("AA1_2430_MCBSP1_DX", 0x011C, 0, 0, 0, 1)
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MUX_CFG_24XX("AF3_2430_MCBSP1_DR", 0x011D, 0, 0, 0, 1)
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MUX_CFG_24XX("AB3_2430_MCBSP1_FSX", 0x011F, 0, 0, 0, 1)
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MUX_CFG_24XX("Y9_2430_MCBSP1_CLKX", 0x0120, 0, 0, 0, 1)
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MUX_CFG_24XX("AC10_2430_MCBSP2_FSX", 0x012E, 1, 0, 0, 1)
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MUX_CFG_24XX("AD16_2430_MCBSP2_CLX", 0x012F, 1, 0, 0, 1)
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MUX_CFG_24XX("AE13_2430_MCBSP2_DX", 0x0130, 1, 0, 0, 1)
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MUX_CFG_24XX("AD13_2430_MCBSP2_DR", 0x0131, 1, 0, 0, 1)
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MUX_CFG_24XX("AC10_2430_MCBSP2_FSX_OFF",0x012E, 0, 0, 0, 1)
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MUX_CFG_24XX("AD16_2430_MCBSP2_CLX_OFF",0x012F, 0, 0, 0, 1)
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MUX_CFG_24XX("AE13_2430_MCBSP2_DX_OFF", 0x0130, 0, 0, 0, 1)
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MUX_CFG_24XX("AD13_2430_MCBSP2_DR_OFF", 0x0131, 0, 0, 0, 1)
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MUX_CFG_24XX("AC9_2430_MCBSP3_CLKX", 0x0103, 0, 0, 0, 1)
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MUX_CFG_24XX("AE4_2430_MCBSP3_FSX", 0x0104, 0, 0, 0, 1)
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MUX_CFG_24XX("AE2_2430_MCBSP3_DR", 0x0105, 0, 0, 0, 1)
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MUX_CFG_24XX("AF4_2430_MCBSP3_DX", 0x0106, 0, 0, 0, 1)
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MUX_CFG_24XX("N3_2430_MCBSP4_CLKX", 0x010B, 1, 0, 0, 1)
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MUX_CFG_24XX("AD23_2430_MCBSP4_DR", 0x010C, 1, 0, 0, 1)
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MUX_CFG_24XX("AB25_2430_MCBSP4_DX", 0x010D, 1, 0, 0, 1)
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MUX_CFG_24XX("AC25_2430_MCBSP4_FSX", 0x010E, 1, 0, 0, 1)
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MUX_CFG_24XX("AE16_2430_MCBSP5_CLKX", 0x00ED, 1, 0, 0, 1)
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MUX_CFG_24XX("AF12_2430_MCBSP5_FSX", 0x00ED, 1, 0, 0, 1)
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MUX_CFG_24XX("K7_2430_MCBSP5_DX", 0x00EF, 1, 0, 0, 1)
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MUX_CFG_24XX("M1_2430_MCBSP5_DR", 0x00F0, 1, 0, 0, 1)
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/* 2430 MCSPI1 */
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MUX_CFG_24XX("Y18_2430_MCSPI1_CLK", 0x010F, 0, 0, 0, 1)
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MUX_CFG_24XX("AD15_2430_MCSPI1_SIMO", 0x0110, 0, 0, 0, 1)
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MUX_CFG_24XX("AE17_2430_MCSPI1_SOMI", 0x0111, 0, 0, 0, 1)
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MUX_CFG_24XX("U1_2430_MCSPI1_CS0", 0x0112, 0, 0, 0, 1)
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/* Touchscreen GPIO */
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MUX_CFG_24XX("AF19_2430_GPIO_85", 0x0113, 3, 0, 0, 1)
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};
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#define OMAP24XX_PINS_SZ ARRAY_SIZE(omap24xx_pins)
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#if defined(CONFIG_OMAP_MUX_DEBUG) || defined(CONFIG_OMAP_MUX_WARNINGS)
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static void __init_or_module omap2_cfg_debug(const struct pin_config *cfg, u16 reg)
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{
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u16 orig;
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u8 warn = 0, debug = 0;
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orig = omap_mux_read(cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
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|
|
#ifdef CONFIG_OMAP_MUX_DEBUG
|
|
debug = cfg->debug;
|
|
#endif
|
|
warn = (orig != reg);
|
|
if (debug || warn)
|
|
printk(KERN_WARNING
|
|
"MUX: setup %s (0x%p): 0x%04x -> 0x%04x\n",
|
|
cfg->name, omap_ctrl_base_get() + cfg->mux_reg,
|
|
orig, reg);
|
|
}
|
|
#else
|
|
#define omap2_cfg_debug(x, y) do {} while (0)
|
|
#endif
|
|
|
|
static int __init_or_module omap24xx_cfg_reg(const struct pin_config *cfg)
|
|
{
|
|
static DEFINE_SPINLOCK(mux_spin_lock);
|
|
unsigned long flags;
|
|
u8 reg = 0;
|
|
|
|
spin_lock_irqsave(&mux_spin_lock, flags);
|
|
reg |= cfg->mask & 0x7;
|
|
if (cfg->pull_val)
|
|
reg |= OMAP2_PULL_ENA;
|
|
if (cfg->pu_pd_val)
|
|
reg |= OMAP2_PULL_UP;
|
|
omap2_cfg_debug(cfg, reg);
|
|
omap_mux_write(reg, cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
|
|
spin_unlock_irqrestore(&mux_spin_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int __init omap2_mux_init(void)
|
|
{
|
|
u32 mux_pbase;
|
|
|
|
if (cpu_is_omap2420())
|
|
mux_pbase = OMAP2420_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
|
|
else if (cpu_is_omap2430())
|
|
mux_pbase = OMAP243X_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
|
|
else
|
|
return -ENODEV;
|
|
|
|
mux_base = ioremap(mux_pbase, OMAP_MUX_BASE_SZ);
|
|
if (!mux_base) {
|
|
printk(KERN_ERR "mux: Could not ioremap\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (cpu_is_omap24xx()) {
|
|
arch_mux_cfg.pins = omap24xx_pins;
|
|
arch_mux_cfg.size = OMAP24XX_PINS_SZ;
|
|
arch_mux_cfg.cfg_reg = omap24xx_cfg_reg;
|
|
|
|
return omap_mux_register(&arch_mux_cfg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
int __init omap2_mux_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_OMAP_MUX */
|
|
|
|
/*----------------------------------------------------------------------------*/
|
|
|
|
#ifdef CONFIG_ARCH_OMAP34XX
|
|
static LIST_HEAD(muxmodes);
|
|
static DEFINE_MUTEX(muxmode_mutex);
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
|
|
static char *omap_mux_options;
|
|
|
|
int __init omap_mux_init_gpio(int gpio, int val)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
int found = 0;
|
|
|
|
if (!gpio)
|
|
return -EINVAL;
|
|
|
|
list_for_each_entry(e, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
if (gpio == m->gpio) {
|
|
u16 old_mode;
|
|
u16 mux_mode;
|
|
|
|
old_mode = omap_mux_read(m->reg_offset);
|
|
mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
|
|
mux_mode |= OMAP_MUX_MODE4;
|
|
printk(KERN_DEBUG "mux: Setting signal "
|
|
"%s.gpio%i 0x%04x -> 0x%04x\n",
|
|
m->muxnames[0], gpio, old_mode, mux_mode);
|
|
omap_mux_write(mux_mode, m->reg_offset);
|
|
found++;
|
|
}
|
|
}
|
|
|
|
if (found == 1)
|
|
return 0;
|
|
|
|
if (found > 1) {
|
|
printk(KERN_ERR "mux: Multiple gpio paths for gpio%i\n", gpio);
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_ERR "mux: Could not set gpio%i\n", gpio);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
int __init omap_mux_init_signal(char *muxname, int val)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
char *m0_name = NULL, *mode_name = NULL;
|
|
int found = 0;
|
|
|
|
mode_name = strchr(muxname, '.');
|
|
if (mode_name) {
|
|
*mode_name = '\0';
|
|
mode_name++;
|
|
m0_name = muxname;
|
|
} else {
|
|
mode_name = muxname;
|
|
}
|
|
|
|
list_for_each_entry(e, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
char *m0_entry = m->muxnames[0];
|
|
int i;
|
|
|
|
if (m0_name && strcmp(m0_name, m0_entry))
|
|
continue;
|
|
|
|
for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
|
|
char *mode_cur = m->muxnames[i];
|
|
|
|
if (!mode_cur)
|
|
continue;
|
|
|
|
if (!strcmp(mode_name, mode_cur)) {
|
|
u16 old_mode;
|
|
u16 mux_mode;
|
|
|
|
old_mode = omap_mux_read(m->reg_offset);
|
|
mux_mode = val | i;
|
|
printk(KERN_DEBUG "mux: Setting signal "
|
|
"%s.%s 0x%04x -> 0x%04x\n",
|
|
m0_entry, muxname, old_mode, mux_mode);
|
|
omap_mux_write(mux_mode, m->reg_offset);
|
|
found++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (found == 1)
|
|
return 0;
|
|
|
|
if (found > 1) {
|
|
printk(KERN_ERR "mux: Multiple signal paths (%i) for %s\n",
|
|
found, muxname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_ERR "mux: Could not set signal %s\n", muxname);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
#define OMAP_MUX_MAX_NR_FLAGS 10
|
|
#define OMAP_MUX_TEST_FLAG(val, mask) \
|
|
if (((val) & (mask)) == (mask)) { \
|
|
i++; \
|
|
flags[i] = #mask; \
|
|
}
|
|
|
|
/* REVISIT: Add checking for non-optimal mux settings */
|
|
static inline void omap_mux_decode(struct seq_file *s, u16 val)
|
|
{
|
|
char *flags[OMAP_MUX_MAX_NR_FLAGS];
|
|
char mode[14];
|
|
int i = -1;
|
|
|
|
sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7);
|
|
i++;
|
|
flags[i] = mode;
|
|
|
|
OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE);
|
|
if (val & OMAP_OFF_EN) {
|
|
if (!(val & OMAP_OFFOUT_EN)) {
|
|
if (!(val & OMAP_OFF_PULL_UP)) {
|
|
OMAP_MUX_TEST_FLAG(val,
|
|
OMAP_PIN_OFF_INPUT_PULLDOWN);
|
|
} else {
|
|
OMAP_MUX_TEST_FLAG(val,
|
|
OMAP_PIN_OFF_INPUT_PULLUP);
|
|
}
|
|
} else {
|
|
if (!(val & OMAP_OFFOUT_VAL)) {
|
|
OMAP_MUX_TEST_FLAG(val,
|
|
OMAP_PIN_OFF_OUTPUT_LOW);
|
|
} else {
|
|
OMAP_MUX_TEST_FLAG(val,
|
|
OMAP_PIN_OFF_OUTPUT_HIGH);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (val & OMAP_INPUT_EN) {
|
|
if (val & OMAP_PULL_ENA) {
|
|
if (!(val & OMAP_PULL_UP)) {
|
|
OMAP_MUX_TEST_FLAG(val,
|
|
OMAP_PIN_INPUT_PULLDOWN);
|
|
} else {
|
|
OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP);
|
|
}
|
|
} else {
|
|
OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT);
|
|
}
|
|
} else {
|
|
i++;
|
|
flags[i] = "OMAP_PIN_OUTPUT";
|
|
}
|
|
|
|
do {
|
|
seq_printf(s, "%s", flags[i]);
|
|
if (i > 0)
|
|
seq_printf(s, " | ");
|
|
} while (i-- > 0);
|
|
}
|
|
|
|
#define OMAP_MUX_DEFNAME_LEN 16
|
|
|
|
static int omap_mux_dbg_board_show(struct seq_file *s, void *unused)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
|
|
list_for_each_entry(e, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
char m0_def[OMAP_MUX_DEFNAME_LEN];
|
|
char *m0_name = m->muxnames[0];
|
|
u16 val;
|
|
int i, mode;
|
|
|
|
if (!m0_name)
|
|
continue;
|
|
|
|
for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) {
|
|
if (m0_name[i] == '\0') {
|
|
m0_def[i] = m0_name[i];
|
|
break;
|
|
}
|
|
m0_def[i] = toupper(m0_name[i]);
|
|
}
|
|
val = omap_mux_read(m->reg_offset);
|
|
mode = val & OMAP_MUX_MODE7;
|
|
|
|
seq_printf(s, "OMAP%i_MUX(%s, ",
|
|
cpu_is_omap34xx() ? 3 : 0, m0_def);
|
|
omap_mux_decode(s, val);
|
|
seq_printf(s, "),\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap_mux_dbg_board_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, omap_mux_dbg_board_show, &inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations omap_mux_dbg_board_fops = {
|
|
.open = omap_mux_dbg_board_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused)
|
|
{
|
|
struct omap_mux *m = s->private;
|
|
const char *none = "NA";
|
|
u16 val;
|
|
int mode;
|
|
|
|
val = omap_mux_read(m->reg_offset);
|
|
mode = val & OMAP_MUX_MODE7;
|
|
|
|
seq_printf(s, "name: %s.%s (0x%08lx/0x%03x = 0x%04x), b %s, t %s\n",
|
|
m->muxnames[0], m->muxnames[mode],
|
|
mux_phys + m->reg_offset, m->reg_offset, val,
|
|
m->balls[0] ? m->balls[0] : none,
|
|
m->balls[1] ? m->balls[1] : none);
|
|
seq_printf(s, "mode: ");
|
|
omap_mux_decode(s, val);
|
|
seq_printf(s, "\n");
|
|
seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n",
|
|
m->muxnames[0] ? m->muxnames[0] : none,
|
|
m->muxnames[1] ? m->muxnames[1] : none,
|
|
m->muxnames[2] ? m->muxnames[2] : none,
|
|
m->muxnames[3] ? m->muxnames[3] : none,
|
|
m->muxnames[4] ? m->muxnames[4] : none,
|
|
m->muxnames[5] ? m->muxnames[5] : none,
|
|
m->muxnames[6] ? m->muxnames[6] : none,
|
|
m->muxnames[7] ? m->muxnames[7] : none);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define OMAP_MUX_MAX_ARG_CHAR 7
|
|
|
|
static ssize_t omap_mux_dbg_signal_write(struct file *file,
|
|
const char __user *user_buf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
char buf[OMAP_MUX_MAX_ARG_CHAR];
|
|
struct seq_file *seqf;
|
|
struct omap_mux *m;
|
|
unsigned long val;
|
|
int buf_size, ret;
|
|
|
|
if (count > OMAP_MUX_MAX_ARG_CHAR)
|
|
return -EINVAL;
|
|
|
|
memset(buf, 0, sizeof(buf));
|
|
buf_size = min(count, sizeof(buf) - 1);
|
|
|
|
if (copy_from_user(buf, user_buf, buf_size))
|
|
return -EFAULT;
|
|
|
|
ret = strict_strtoul(buf, 0x10, &val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (val > 0xffff)
|
|
return -EINVAL;
|
|
|
|
seqf = file->private_data;
|
|
m = seqf->private;
|
|
|
|
omap_mux_write((u16)val, m->reg_offset);
|
|
*ppos += count;
|
|
|
|
return count;
|
|
}
|
|
|
|
static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, omap_mux_dbg_signal_show, inode->i_private);
|
|
}
|
|
|
|
static const struct file_operations omap_mux_dbg_signal_fops = {
|
|
.open = omap_mux_dbg_signal_open,
|
|
.read = seq_read,
|
|
.write = omap_mux_dbg_signal_write,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static struct dentry *mux_dbg_dir;
|
|
|
|
static void __init omap_mux_dbg_init(void)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
|
|
mux_dbg_dir = debugfs_create_dir("omap_mux", NULL);
|
|
if (!mux_dbg_dir)
|
|
return;
|
|
|
|
(void)debugfs_create_file("board", S_IRUGO, mux_dbg_dir,
|
|
NULL, &omap_mux_dbg_board_fops);
|
|
|
|
list_for_each_entry(e, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
|
|
(void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir,
|
|
m, &omap_mux_dbg_signal_fops);
|
|
}
|
|
}
|
|
|
|
#else
|
|
static inline void omap_mux_dbg_init(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
static void __init omap_mux_free_names(struct omap_mux *m)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < OMAP_MUX_NR_MODES; i++)
|
|
kfree(m->muxnames[i]);
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
for (i = 0; i < OMAP_MUX_NR_SIDES; i++)
|
|
kfree(m->balls[i]);
|
|
#endif
|
|
|
|
}
|
|
|
|
/* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */
|
|
static int __init omap_mux_late_init(void)
|
|
{
|
|
struct omap_mux_entry *e, *tmp;
|
|
|
|
list_for_each_entry_safe(e, tmp, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
u16 mode = omap_mux_read(m->reg_offset);
|
|
|
|
if (OMAP_MODE_GPIO(mode))
|
|
continue;
|
|
|
|
#ifndef CONFIG_DEBUG_FS
|
|
mutex_lock(&muxmode_mutex);
|
|
list_del(&e->node);
|
|
mutex_unlock(&muxmode_mutex);
|
|
omap_mux_free_names(m);
|
|
kfree(m);
|
|
#endif
|
|
|
|
}
|
|
|
|
omap_mux_dbg_init();
|
|
|
|
return 0;
|
|
}
|
|
late_initcall(omap_mux_late_init);
|
|
|
|
static void __init omap_mux_package_fixup(struct omap_mux *p,
|
|
struct omap_mux *superset)
|
|
{
|
|
while (p->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *s = superset;
|
|
int found = 0;
|
|
|
|
while (s->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
if (s->reg_offset == p->reg_offset) {
|
|
*s = *p;
|
|
found++;
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
if (!found)
|
|
printk(KERN_ERR "mux: Unknown entry offset 0x%x\n",
|
|
p->reg_offset);
|
|
p++;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
static void __init omap_mux_package_init_balls(struct omap_ball *b,
|
|
struct omap_mux *superset)
|
|
{
|
|
while (b->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *s = superset;
|
|
int found = 0;
|
|
|
|
while (s->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
if (s->reg_offset == b->reg_offset) {
|
|
s->balls[0] = b->balls[0];
|
|
s->balls[1] = b->balls[1];
|
|
found++;
|
|
break;
|
|
}
|
|
s++;
|
|
}
|
|
if (!found)
|
|
printk(KERN_ERR "mux: Unknown ball offset 0x%x\n",
|
|
b->reg_offset);
|
|
b++;
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_DEBUG_FS */
|
|
|
|
static inline void omap_mux_package_init_balls(struct omap_ball *b,
|
|
struct omap_mux *superset)
|
|
{
|
|
}
|
|
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
|
|
static int __init omap_mux_setup(char *options)
|
|
{
|
|
if (!options)
|
|
return 0;
|
|
|
|
omap_mux_options = options;
|
|
|
|
return 1;
|
|
}
|
|
__setup("omap_mux=", omap_mux_setup);
|
|
|
|
/*
|
|
* Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234
|
|
* cmdline options only override the bootloader values.
|
|
* During development, please enable CONFIG_DEBUG_FS, and use the
|
|
* signal specific entries under debugfs.
|
|
*/
|
|
static void __init omap_mux_set_cmdline_signals(void)
|
|
{
|
|
char *options, *next_opt, *token;
|
|
|
|
if (!omap_mux_options)
|
|
return;
|
|
|
|
options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL);
|
|
if (!options)
|
|
return;
|
|
|
|
strcpy(options, omap_mux_options);
|
|
next_opt = options;
|
|
|
|
while ((token = strsep(&next_opt, ",")) != NULL) {
|
|
char *keyval, *name;
|
|
unsigned long val;
|
|
|
|
keyval = token;
|
|
name = strsep(&keyval, "=");
|
|
if (name) {
|
|
int res;
|
|
|
|
res = strict_strtoul(keyval, 0x10, &val);
|
|
if (res < 0)
|
|
continue;
|
|
|
|
omap_mux_init_signal(name, (u16)val);
|
|
}
|
|
}
|
|
|
|
kfree(options);
|
|
}
|
|
|
|
static void __init omap_mux_set_board_signals(struct omap_board_mux *board_mux)
|
|
{
|
|
while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
omap_mux_write(board_mux->value, board_mux->reg_offset);
|
|
board_mux++;
|
|
}
|
|
}
|
|
|
|
static int __init omap_mux_copy_names(struct omap_mux *src,
|
|
struct omap_mux *dst)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
|
|
if (src->muxnames[i]) {
|
|
dst->muxnames[i] =
|
|
kmalloc(strlen(src->muxnames[i]) + 1,
|
|
GFP_KERNEL);
|
|
if (!dst->muxnames[i])
|
|
goto free;
|
|
strcpy(dst->muxnames[i], src->muxnames[i]);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
for (i = 0; i < OMAP_MUX_NR_SIDES; i++) {
|
|
if (src->balls[i]) {
|
|
dst->balls[i] =
|
|
kmalloc(strlen(src->balls[i]) + 1,
|
|
GFP_KERNEL);
|
|
if (!dst->balls[i])
|
|
goto free;
|
|
strcpy(dst->balls[i], src->balls[i]);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
free:
|
|
omap_mux_free_names(dst);
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
#endif /* CONFIG_OMAP_MUX */
|
|
|
|
static u16 omap_mux_get_by_gpio(int gpio)
|
|
{
|
|
struct omap_mux_entry *e;
|
|
u16 offset = OMAP_MUX_TERMINATOR;
|
|
|
|
list_for_each_entry(e, &muxmodes, node) {
|
|
struct omap_mux *m = &e->mux;
|
|
if (m->gpio == gpio) {
|
|
offset = m->reg_offset;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* Needed for dynamic muxing of GPIO pins for off-idle */
|
|
u16 omap_mux_get_gpio(int gpio)
|
|
{
|
|
u16 offset;
|
|
|
|
offset = omap_mux_get_by_gpio(gpio);
|
|
if (offset == OMAP_MUX_TERMINATOR) {
|
|
printk(KERN_ERR "mux: Could not get gpio%i\n", gpio);
|
|
return offset;
|
|
}
|
|
|
|
return omap_mux_read(offset);
|
|
}
|
|
|
|
/* Needed for dynamic muxing of GPIO pins for off-idle */
|
|
void omap_mux_set_gpio(u16 val, int gpio)
|
|
{
|
|
u16 offset;
|
|
|
|
offset = omap_mux_get_by_gpio(gpio);
|
|
if (offset == OMAP_MUX_TERMINATOR) {
|
|
printk(KERN_ERR "mux: Could not set gpio%i\n", gpio);
|
|
return;
|
|
}
|
|
|
|
omap_mux_write(val, offset);
|
|
}
|
|
|
|
static struct omap_mux * __init omap_mux_list_add(struct omap_mux *src)
|
|
{
|
|
struct omap_mux_entry *entry;
|
|
struct omap_mux *m;
|
|
|
|
entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return NULL;
|
|
|
|
m = &entry->mux;
|
|
memcpy(m, src, sizeof(struct omap_mux_entry));
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
if (omap_mux_copy_names(src, m)) {
|
|
kfree(entry);
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
mutex_lock(&muxmode_mutex);
|
|
list_add_tail(&entry->node, &muxmodes);
|
|
mutex_unlock(&muxmode_mutex);
|
|
|
|
return m;
|
|
}
|
|
|
|
/*
|
|
* Note if CONFIG_OMAP_MUX is not selected, we will only initialize
|
|
* the GPIO to mux offset mapping that is needed for dynamic muxing
|
|
* of GPIO pins for off-idle.
|
|
*/
|
|
static void __init omap_mux_init_list(struct omap_mux *superset)
|
|
{
|
|
while (superset->reg_offset != OMAP_MUX_TERMINATOR) {
|
|
struct omap_mux *entry;
|
|
|
|
#ifndef CONFIG_OMAP_MUX
|
|
/* Skip pins that are not muxed as GPIO by bootloader */
|
|
if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) {
|
|
superset++;
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
entry = omap_mux_list_add(superset);
|
|
if (!entry) {
|
|
printk(KERN_ERR "mux: Could not add entry\n");
|
|
return;
|
|
}
|
|
superset++;
|
|
}
|
|
}
|
|
|
|
int __init omap_mux_init(u32 mux_pbase, u32 mux_size,
|
|
struct omap_mux *superset,
|
|
struct omap_mux *package_subset,
|
|
struct omap_board_mux *board_mux,
|
|
struct omap_ball *package_balls)
|
|
{
|
|
if (mux_base)
|
|
return -EBUSY;
|
|
|
|
mux_phys = mux_pbase;
|
|
mux_base = ioremap(mux_pbase, mux_size);
|
|
if (!mux_base) {
|
|
printk(KERN_ERR "mux: Could not ioremap\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
#ifdef CONFIG_OMAP_MUX
|
|
if (package_subset)
|
|
omap_mux_package_fixup(package_subset, superset);
|
|
if (package_balls)
|
|
omap_mux_package_init_balls(package_balls, superset);
|
|
omap_mux_set_cmdline_signals();
|
|
omap_mux_set_board_signals(board_mux);
|
|
#endif
|
|
|
|
omap_mux_init_list(superset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_ARCH_OMAP34XX */
|
|
|