diff options
Diffstat (limited to 'arch/m68k/coldfire/m54xx.c')
| -rw-r--r-- | arch/m68k/coldfire/m54xx.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/m54xx.c b/arch/m68k/coldfire/m54xx.c new file mode 100644 index 000000000..8e3c8fee8 --- /dev/null +++ b/arch/m68k/coldfire/m54xx.c @@ -0,0 +1,100 @@ +// SPDX-License-Identifier: GPL-2.0 +/***************************************************************************/ + +/* + * m54xx.c -- platform support for ColdFire 54xx based boards + * + * Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be> + */ + +/***************************************************************************/ + +#include <linux/clkdev.h> +#include <linux/kernel.h> +#include <linux/param.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mm.h> +#include <linux/clk.h> +#include <linux/memblock.h> +#include <asm/pgalloc.h> +#include <asm/machdep.h> +#include <asm/coldfire.h> +#include <asm/m54xxsim.h> +#include <asm/mcfuart.h> +#include <asm/mcfclk.h> +#include <asm/m54xxgpt.h> +#ifdef CONFIG_MMU +#include <asm/mmu_context.h> +#endif + +/***************************************************************************/ + +DEFINE_CLK(pll, "pll.0", MCF_CLK); +DEFINE_CLK(sys, "sys.0", MCF_BUSCLK); + +static struct clk_lookup m54xx_clk_lookup[] = { + CLKDEV_INIT(NULL, "pll.0", &clk_pll), + CLKDEV_INIT(NULL, "sys.0", &clk_sys), + CLKDEV_INIT("mcfslt.0", NULL, &clk_sys), + CLKDEV_INIT("mcfslt.1", NULL, &clk_sys), + CLKDEV_INIT("mcfuart.0", NULL, &clk_sys), + CLKDEV_INIT("mcfuart.1", NULL, &clk_sys), + CLKDEV_INIT("mcfuart.2", NULL, &clk_sys), + CLKDEV_INIT("mcfuart.3", NULL, &clk_sys), + CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys), +}; + +/***************************************************************************/ + +static void __init m54xx_uarts_init(void) +{ + /* enable io pins */ + __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0); + __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS, + MCFGPIO_PAR_PSC1); + __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS | + MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2); + __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3); +} + +/***************************************************************************/ + +static void __init m54xx_i2c_init(void) +{ +#if IS_ENABLED(CONFIG_I2C_IMX) + u32 r; + + /* set the fec/i2c/irq pin assignment register for i2c */ + r = readl(MCF_PAR_FECI2CIRQ); + r |= MCF_PAR_FECI2CIRQ_SDA | MCF_PAR_FECI2CIRQ_SCL; + writel(r, MCF_PAR_FECI2CIRQ); +#endif /* IS_ENABLED(CONFIG_I2C_IMX) */ +} + +/***************************************************************************/ + +static void mcf54xx_reset(void) +{ + /* disable interrupts and enable the watchdog */ + asm("movew #0x2700, %sr\n"); + __raw_writel(0, MCF_GPT_GMS0); + __raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0); + __raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4), + MCF_GPT_GMS0); +} + +/***************************************************************************/ + +void __init config_BSP(char *commandp, int size) +{ + mach_reset = mcf54xx_reset; + mach_sched_init = hw_timer_init; + m54xx_uarts_init(); + m54xx_i2c_init(); + + clkdev_add_table(m54xx_clk_lookup, ARRAY_SIZE(m54xx_clk_lookup)); +} + +/***************************************************************************/ |