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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/m68k/coldfire/m528x.c
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// SPDX-License-Identifier: GPL-2.0

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/***************************************************************************/

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/*

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 *	m528x.c  -- platform support for ColdFire 528x based boards

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 *

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 *	Sub-architcture dependent initialization code for the Freescale

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 *	5280, 5281 and 5282 CPUs.

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 *

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 *	Copyright (C) 1999-2003, Greg Ungerer ([email protected])

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 *	Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)

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 */

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/***************************************************************************/

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#include <linux/clkdev.h>

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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/platform_device.h>

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#include <linux/io.h>

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#include <asm/machdep.h>

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#include <asm/coldfire.h>

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#include <asm/mcfsim.h>

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#include <asm/mcfuart.h>

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#include <asm/mcfclk.h>

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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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static struct clk_lookup m528x_clk_lookup[] = {

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	CLKDEV_INIT(NULL, "pll.0", &clk_pll),

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	CLKDEV_INIT(NULL, "sys.0", &clk_sys),

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	CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),

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	CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),

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	CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),

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	CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),

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	CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),

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	CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),

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	CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),

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	CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),

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	CLKDEV_INIT("fec.0", NULL, &clk_sys),

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	CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),

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};

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/***************************************************************************/

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static void __init m528x_qspi_init(void)

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{

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#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)

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	/* setup Port QS for QSPI with gpio CS control */

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	__raw_writeb(0x07, MCFGPIO_PQSPAR);

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#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */

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}

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/***************************************************************************/

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static void __init m528x_i2c_init(void)

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{

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#if IS_ENABLED(CONFIG_I2C_IMX)

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	u16 paspar;

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	/* setup Port AS Pin Assignment Register for I2C */

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	/*  set PASPA0 to SCL and PASPA1 to SDA */

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	paspar = readw(MCFGPIO_PASPAR);

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	paspar |= 0xF;

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	writew(paspar, MCFGPIO_PASPAR);

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#endif /* IS_ENABLED(CONFIG_I2C_IMX) */

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}

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/***************************************************************************/

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static void __init m528x_uarts_init(void)

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{

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	u8 port;

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	/* make sure PUAPAR is set for UART0 and UART1 */

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	port = readb(MCFGPIO_PUAPAR);

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	port |= 0x03 | (0x03 << 2);

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	writeb(port, MCFGPIO_PUAPAR);

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}

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/***************************************************************************/

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static void __init m528x_fec_init(void)

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{

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	u16 v16;

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	/* Set multi-function pins to ethernet mode for fec0 */

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	v16 = readw(MCFGPIO_PASPAR);

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	writew(v16 | 0xf00, MCFGPIO_PASPAR);

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	writeb(0xc0, MCFGPIO_PEHLPAR);

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}

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/***************************************************************************/

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#ifdef CONFIG_WILDFIRE

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void wildfire_halt(void)

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{

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	writeb(0, 0x30000007);

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	writeb(0x2, 0x30000007);

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}

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#endif

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#ifdef CONFIG_WILDFIREMOD

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void wildfiremod_halt(void)

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{

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	printk(KERN_INFO "WildFireMod hibernating...\n");

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	/* Set portE.5 to Digital IO */

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	writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR);

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	/* Make portE.5 an output */

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	writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E);

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	/* Now toggle portE.5 from low to high */

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	writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E);

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	writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E);

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	printk(KERN_EMERG "Failed to hibernate. Halting!\n");

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}

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#endif

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void __init config_BSP(char *commandp, int size)

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{

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#ifdef CONFIG_WILDFIRE

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	mach_halt = wildfire_halt;

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#endif

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#ifdef CONFIG_WILDFIREMOD

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	mach_halt = wildfiremod_halt;

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#endif

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	mach_sched_init = hw_timer_init;

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	m528x_uarts_init();

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	m528x_fec_init();

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	m528x_qspi_init();

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	m528x_i2c_init();

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	clkdev_add_table(m528x_clk_lookup, ARRAY_SIZE(m528x_clk_lookup));

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}

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/***************************************************************************/

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