diff options
Diffstat (limited to 'cpu/arm926ejs/mx25')
-rw-r--r-- | cpu/arm926ejs/mx25/Makefile | 46 | ||||
-rw-r--r-- | cpu/arm926ejs/mx25/generic.c | 263 | ||||
-rw-r--r-- | cpu/arm926ejs/mx25/reset.c | 56 | ||||
-rw-r--r-- | cpu/arm926ejs/mx25/timer.c | 187 |
4 files changed, 552 insertions, 0 deletions
diff --git a/cpu/arm926ejs/mx25/Makefile b/cpu/arm926ejs/mx25/Makefile new file mode 100644 index 0000000..55c1e89 --- /dev/null +++ b/cpu/arm926ejs/mx25/Makefile @@ -0,0 +1,46 @@ +# +# (C) Copyright 2000-2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# See file CREDITS for list of people who contributed to this +# project. +# +# 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., 59 Temple Place, Suite 330, Boston, +# MA 02111-1307 USA + +include $(TOPDIR)/config.mk + +LIB = $(obj)lib$(SOC).a + +COBJS = generic.o timer.o +MX27OBJS = reset.o + +SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) +SRCS += $(addprefix $(SRCTREE)/cpu/arm926ejs/mx27/,$(MX27OBJS:.o=.c)) +OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS) $(MX27OBJS)) + +all: $(obj).depend $(LIB) + +$(LIB): $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/cpu/arm926ejs/mx25/generic.c b/cpu/arm926ejs/mx25/generic.c new file mode 100644 index 0000000..694841d --- /dev/null +++ b/cpu/arm926ejs/mx25/generic.c @@ -0,0 +1,263 @@ +/* + * (C) Copyright 2009 DENX Software Engineering + * Author: John Rigby <jrigby@gmail.com> + * + * Based on mx27/generic.c: + * Copyright (c) 2008 Eric Jarrige <eric.jarrige@armadeus.org> + * Copyright (c) 2009 Ilya Yanok <yanok@emcraft.com> + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <div64.h> +#include <netdev.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/imx25-pinmux.h> +#ifdef CONFIG_MXC_MMC +#include <asm/arch/mxcmmc.h> +#endif + +/* + * get the system pll clock in Hz + * + * mfi + mfn / (mfd +1) + * f = 2 * f_ref * -------------------- + * pd + 1 + */ +static unsigned int imx_decode_pll (unsigned int pll, unsigned int f_ref) +{ + unsigned int mfi = (pll >> CCM_PLL_MFI_SHIFT) + & CCM_PLL_MFI_MASK; + unsigned int mfn = (pll >> CCM_PLL_MFN_SHIFT) + & CCM_PLL_MFN_MASK; + unsigned int mfd = (pll >> CCM_PLL_MFD_SHIFT) + & CCM_PLL_MFD_MASK; + unsigned int pd = (pll >> CCM_PLL_PD_SHIFT) + & CCM_PLL_PD_MASK; + + mfi = mfi <= 5 ? 5 : mfi; + + return lldiv (2 * (u64) f_ref * (mfi * (mfd + 1) + mfn), + (mfd + 1) * (pd + 1)); +} + +static ulong imx_get_mpllclk (void) +{ + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + ulong fref = 24000000; + + return imx_decode_pll (readl (&ccm->mpctl), fref); +} + +ulong imx_get_armclk (void) +{ + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + ulong cctl = readl (&ccm->cctl); + ulong fref = imx_get_mpllclk (); + ulong div; + + if (cctl & CCM_CCTL_ARM_SRC) + fref = lldiv ((fref * 3), 4); + + div = ((cctl >> CCM_CCTL_ARM_DIV_SHIFT) + & CCM_CCTL_ARM_DIV_MASK) + 1; + + return lldiv (fref, div); +} + +ulong imx_get_ahbclk (void) +{ + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + ulong cctl = readl (&ccm->cctl); + ulong fref = imx_get_armclk (); + ulong div; + + div = ((cctl >> CCM_CCTL_AHB_DIV_SHIFT) + & CCM_CCTL_AHB_DIV_MASK) + 1; + + return lldiv (fref, div); +} + +ulong imx_get_perclk (int clk) +{ + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + ulong fref = imx_get_ahbclk (); + ulong div; + + div = readl (&ccm->pcdr[CCM_PERCLK_REG (clk)]); + div = ((div >> CCM_PERCLK_SHIFT (clk)) & CCM_PERCLK_MASK) + 1; + + return lldiv (fref, div); +} + +#if defined(CONFIG_DISPLAY_CPUINFO) +int print_cpuinfo (void) +{ + char buf[32]; + + printf ("CPU: Freescale i.MX25 at %s MHz\n\n", + strmhz (buf, imx_get_mpllclk ())); + return 0; +} +#endif + +int cpu_eth_init (bd_t * bis) +{ +#if defined(CONFIG_FEC_MXC) + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + ulong val; + + val = readl (&ccm->cgr0); + val |= (1 << 23); + writel (val, &ccm->cgr0); + return fecmxc_initialize (bis); +#else + return 0; +#endif +} + +/* + * Initializes on-chip MMC controllers. + * to override, implement board_mmc_init() + */ +int cpu_mmc_init (bd_t * bis) +{ +#ifdef CONFIG_MXC_MMC + return mxc_mmc_init (bis); +#else + return 0; +#endif +} + +#ifdef CONFIG_MXC_UART +void mx25_uart_init_pins (void) +{ + struct iomuxc_mux_ctl *muxctl; + struct iomuxc_pad_ctl *padctl; + u32 inpadctl; + u32 outpadctl; + u32 muxmode0; + + muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE; + padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE; + muxmode0 = MX25_PIN_MUX_MODE (0); + /* + * set up input pins with hysteresis and 100K pull-ups + */ + inpadctl = MX25_PIN_PAD_CTL_HYS + | MX25_PIN_PAD_CTL_PKE + | MX25_PIN_PAD_CTL_PUE | MX25_PIN_PAD_CTL_100K_PU; + + /* + * set up output pins with 100K pull-downs + * FIXME: need to revisit this + * PUE is ignored if PKE is not set + * so the right value here is likely + * 0x0 for no pull up/down + * or + * 0xc0 for 100k pull down + */ + outpadctl = MX25_PIN_PAD_CTL_PUE | MX25_PIN_PAD_CTL_100K_PD; + + /* UART1 */ + /* rxd */ + writel (muxmode0, &muxctl->pad_uart1_rxd); + writel (inpadctl, &padctl->pad_uart1_rxd); + + /* txd */ + writel (muxmode0, &muxctl->pad_uart1_txd); + writel (outpadctl, &padctl->pad_uart1_txd); + + /* rts */ + writel (muxmode0, &muxctl->pad_uart1_rts); + writel (outpadctl, &padctl->pad_uart1_rts); + + /* cts */ + writel (muxmode0, &muxctl->pad_uart1_cts); + writel (inpadctl, &padctl->pad_uart1_cts); +} +#endif /* CONFIG_MXC_UART */ + +#ifdef CONFIG_FEC_MXC +void mx25_fec_init_pins (void) +{ + struct iomuxc_mux_ctl *muxctl; + struct iomuxc_pad_ctl *padctl; + u32 inpadctl_100kpd; + u32 inpadctl_22kpu; + u32 outpadctl; + u32 muxmode0; + + muxctl = (struct iomuxc_mux_ctl *)IMX_IOPADMUX_BASE; + padctl = (struct iomuxc_pad_ctl *)IMX_IOPADCTL_BASE; + muxmode0 = MX25_PIN_MUX_MODE (0); + inpadctl_100kpd = MX25_PIN_PAD_CTL_HYS + | MX25_PIN_PAD_CTL_PKE + | MX25_PIN_PAD_CTL_PUE | MX25_PIN_PAD_CTL_100K_PD; + inpadctl_22kpu = MX25_PIN_PAD_CTL_HYS + | MX25_PIN_PAD_CTL_PKE + | MX25_PIN_PAD_CTL_PUE | MX25_PIN_PAD_CTL_22K_PU; + /* + * set up output pins with 100K pull-downs + * FIXME: need to revisit this + * PUE is ignored if PKE is not set + * so the right value here is likely + * 0x0 for no pull + * or + * 0xc0 for 100k pull down + */ + outpadctl = MX25_PIN_PAD_CTL_PUE | MX25_PIN_PAD_CTL_100K_PD; + + /* FEC_TX_CLK */ + writel (muxmode0, &muxctl->pad_fec_tx_clk); + writel (inpadctl_100kpd, &padctl->pad_fec_tx_clk); + + /* FEC_RX_DV */ + writel (muxmode0, &muxctl->pad_fec_rx_dv); + writel (inpadctl_100kpd, &padctl->pad_fec_rx_dv); + + /* FEC_RDATA0 */ + writel (muxmode0, &muxctl->pad_fec_rdata0); + writel (inpadctl_100kpd, &padctl->pad_fec_rdata0); + + /* FEC_TDATA0 */ + writel (muxmode0, &muxctl->pad_fec_tdata0); + writel (outpadctl, &padctl->pad_fec_tdata0); + + /* FEC_TX_EN */ + writel (muxmode0, &muxctl->pad_fec_tx_en); + writel (outpadctl, &padctl->pad_fec_tx_en); + + /* FEC_MDC */ + writel (muxmode0, &muxctl->pad_fec_mdc); + writel (outpadctl, &padctl->pad_fec_mdc); + + /* FEC_MDIO */ + writel (muxmode0, &muxctl->pad_fec_mdio); + writel (inpadctl_22kpu, &padctl->pad_fec_mdio); + + /* FEC_RDATA1 */ + writel (muxmode0, &muxctl->pad_fec_rdata1); + writel (inpadctl_100kpd, &padctl->pad_fec_rdata1); + + /* FEC_TDATA1 */ + writel (muxmode0, &muxctl->pad_fec_tdata1); + writel (outpadctl, &padctl->pad_fec_tdata1); + +} +#endif /* CONFIG_FEC_MXC */ diff --git a/cpu/arm926ejs/mx25/reset.c b/cpu/arm926ejs/mx25/reset.c new file mode 100644 index 0000000..1e33150 --- /dev/null +++ b/cpu/arm926ejs/mx25/reset.c @@ -0,0 +1,56 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> + * + * (C) Copyright 2009 + * Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> + +/* + * Reset the cpu by setting up the watchdog timer and let it time out + */ +void reset_cpu (ulong ignored) +{ + struct wdog_regs *regs = (struct wdog_regs *)IMX_WDT_BASE; + /* Disable watchdog and set Time-Out field to 0 */ + writel (0x00000000, ®s->wcr); + + /* Write Service Sequence */ + writel (0x00005555, ®s->wsr); + writel (0x0000AAAA, ®s->wsr); + + /* Enable watchdog */ + writel (WCR_WDE, ®s->wcr); + + while (1) ; +} diff --git a/cpu/arm926ejs/mx25/timer.c b/cpu/arm926ejs/mx25/timer.c new file mode 100644 index 0000000..11d41a8 --- /dev/null +++ b/cpu/arm926ejs/mx25/timer.c @@ -0,0 +1,187 @@ +/* + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger <mgroeger@sysgo.de> + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Alex Zuepke <azu@sysgo.de> + * + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, <gj@denx.de> + * + * (C) Copyright 2009 + * Ilya Yanok, Emcraft Systems Ltd, <yanok@emcraft.com> + * + * (C) Copyright 2009 DENX Software Engineering + * Author: John Rigby <jrigby@gmail.com> + * Add support for MX25 + * + * See file CREDITS for list of people who contributed to this + * project. + * + * 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., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <div64.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> + +static ulong timestamp; +static ulong lastinc; + +/* + * "time" is measured in 1 / CONFIG_SYS_HZ seconds, + * "tick" is internal timer period + */ +#ifdef CONFIG_MX25_TIMER_HIGH_PRECISION +/* ~0.4% error - measured with stop-watch on 100s boot-delay */ +static inline unsigned long long tick_to_time(unsigned long long tick) +{ + tick *= CONFIG_SYS_HZ; + do_div(tick, CONFIG_MX25_CLK32); + return tick; +} + +static inline unsigned long long time_to_tick(unsigned long long time) +{ + time *= CONFIG_MX25_CLK32; + do_div(time, CONFIG_SYS_HZ); + return time; +} + +static inline unsigned long long us_to_tick(unsigned long long us) +{ + us = us * CONFIG_MX25_CLK32 + 999999; + do_div(us, 1000000); + return us; +} +#else +/* ~2% error */ +#define TICK_PER_TIME ((CONFIG_MX25_CLK32 + CONFIG_SYS_HZ / 2) / \ + CONFIG_SYS_HZ) +#define US_PER_TICK (1000000 / CONFIG_MX25_CLK32) + +static inline unsigned long long tick_to_time(unsigned long long tick) +{ + do_div(tick, TICK_PER_TIME); + return tick; +} + +static inline unsigned long long time_to_tick(unsigned long long time) +{ + return time * TICK_PER_TIME; +} + +static inline unsigned long long us_to_tick(unsigned long long us) +{ + us += US_PER_TICK - 1; + do_div(us, US_PER_TICK); + return us; +} +#endif + +/* nothing really to do with interrupts, just starts up a counter. */ +/* The 32KHz 32-bit timer overruns in 134217 seconds */ +int timer_init(void) +{ + int i; + struct gpt_regs *gpt = (struct gpt_regs *)IMX_GPT1_BASE; + struct ccm_regs *ccm = (struct ccm_regs *)IMX_CCM_BASE; + + /* setup GP Timer 1 */ + writel(GPT_CTRL_SWR, &gpt->ctrl); + + writel(readl(&ccm->cgr1) | CCM_CGR1_GPT1, &ccm->cgr1); + + for (i = 0; i < 100; i++) + writel(0, &gpt->ctrl); /* We have no udelay by now */ + writel(0, &gpt->pre); /* prescaler = 1 */ + /* Freerun Mode, 32KHz input */ + writel(readl(&gpt->ctrl) | GPT_CTRL_CLKSOURCE_32 | GPT_CTRL_FRR, + &gpt->ctrl); + writel(readl(&gpt->ctrl) | GPT_CTRL_TEN, &gpt->ctrl); + + return 0; +} + +void reset_timer_masked(void) +{ + struct gpt_regs *gpt = (struct gpt_regs *)IMX_GPT1_BASE; + /* reset time */ + /* capture current incrementer value time */ + lastinc = readl(&gpt->counter); + timestamp = 0; /* start "advancing" time stamp from 0 */ +} + +void reset_timer(void) +{ + reset_timer_masked(); +} + +unsigned long long get_ticks (void) +{ + struct gpt_regs *gpt = (struct gpt_regs *)IMX_GPT1_BASE; + ulong now = readl(&gpt->counter); /* current tick value */ + + if (now >= lastinc) { + /* + * normal mode (non roll) + * move stamp forward with absolut diff ticks + */ + timestamp += (now - lastinc); + } else { + /* we have rollover of incrementer */ + timestamp += (0xFFFFFFFF - lastinc) + now; + } + lastinc = now; + return timestamp; +} + +ulong get_timer_masked (void) +{ + /* + * get_ticks() returns a long long (64 bit), it wraps in + * 2^64 / CONFIG_MX25_CLK32 = 2^64 / 2^15 = 2^49 ~ 5 * 10^14 (s) ~ + * 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in + * 5 * 10^6 days - long enough. + */ + return tick_to_time(get_ticks()); +} + +ulong get_timer (ulong base) +{ + return get_timer_masked () - base; +} + +void set_timer (ulong t) +{ + timestamp = time_to_tick(t); +} + +/* delay x useconds AND preserve advance timstamp value */ +void __udelay (unsigned long usec) +{ + unsigned long long tmp; + ulong tmo; + + tmo = us_to_tick(usec); + tmp = get_ticks() + tmo; /* get current timestamp */ + + while (get_ticks() < tmp) /* loop till event */ + /*NOP*/; +} |