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105 lines
2.9 KiB
105 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/***************************************************************************/ |
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/* |
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* m54xx.c -- platform support for ColdFire 54xx based boards |
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* |
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* Copyright (C) 2010, Philippe De Muyter <[email protected]> |
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*/ |
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/***************************************************************************/ |
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#include <linux/kernel.h> |
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#include <linux/param.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/io.h> |
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#include <linux/mm.h> |
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#include <linux/clk.h> |
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#include <linux/memblock.h> |
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#include <asm/pgalloc.h> |
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#include <asm/machdep.h> |
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#include <asm/coldfire.h> |
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#include <asm/m54xxsim.h> |
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#include <asm/mcfuart.h> |
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#include <asm/mcfclk.h> |
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#include <asm/m54xxgpt.h> |
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#ifdef CONFIG_MMU |
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#include <asm/mmu_context.h> |
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#endif |
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/***************************************************************************/ |
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DEFINE_CLK(pll, "pll.0", MCF_CLK); |
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DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); |
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DEFINE_CLK(mcfslt0, "mcfslt.0", MCF_BUSCLK); |
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DEFINE_CLK(mcfslt1, "mcfslt.1", MCF_BUSCLK); |
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DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK); |
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DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK); |
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DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK); |
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DEFINE_CLK(mcfuart3, "mcfuart.3", MCF_BUSCLK); |
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DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK); |
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struct clk *mcf_clks[] = { |
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&clk_pll, |
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&clk_sys, |
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&clk_mcfslt0, |
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&clk_mcfslt1, |
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&clk_mcfuart0, |
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&clk_mcfuart1, |
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&clk_mcfuart2, |
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&clk_mcfuart3, |
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&clk_mcfi2c0, |
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NULL |
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}; |
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/***************************************************************************/ |
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static void __init m54xx_uarts_init(void) |
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{ |
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/* enable io pins */ |
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__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0); |
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__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS, |
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MCFGPIO_PAR_PSC1); |
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__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS | |
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MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2); |
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__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3); |
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} |
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/***************************************************************************/ |
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static void __init m54xx_i2c_init(void) |
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{ |
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#if IS_ENABLED(CONFIG_I2C_IMX) |
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u32 r; |
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/* set the fec/i2c/irq pin assignment register for i2c */ |
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r = readl(MCF_PAR_FECI2CIRQ); |
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r |= MCF_PAR_FECI2CIRQ_SDA | MCF_PAR_FECI2CIRQ_SCL; |
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writel(r, MCF_PAR_FECI2CIRQ); |
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#endif /* IS_ENABLED(CONFIG_I2C_IMX) */ |
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} |
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/***************************************************************************/ |
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static void mcf54xx_reset(void) |
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{ |
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/* disable interrupts and enable the watchdog */ |
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asm("movew #0x2700, %sr\n"); |
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__raw_writel(0, MCF_GPT_GMS0); |
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__raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0); |
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__raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4), |
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MCF_GPT_GMS0); |
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} |
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/***************************************************************************/ |
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void __init config_BSP(char *commandp, int size) |
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{ |
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mach_reset = mcf54xx_reset; |
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mach_sched_init = hw_timer_init; |
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m54xx_uarts_init(); |
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m54xx_i2c_init(); |
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} |
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/***************************************************************************/
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