1// SPDX-License-Identifier: GPL-2.0
  2/***************************************************************************/
  3
  4/*
  5 *	m528x.c  -- platform support for ColdFire 528x based boards
  6 *
  7 *	Sub-architcture dependent initialization code for the Freescale
  8 *	5280, 5281 and 5282 CPUs.
  9 *
 10 *	Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
 11 *	Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
 12 */
 13
 14/***************************************************************************/
 15
 16#include <linux/kernel.h>
 17#include <linux/param.h>
 18#include <linux/init.h>
 19#include <linux/platform_device.h>
 20#include <linux/io.h>
 21#include <asm/machdep.h>
 22#include <asm/coldfire.h>
 23#include <asm/mcfsim.h>
 24#include <asm/mcfuart.h>
 25#include <asm/mcfclk.h>
 26
 27/***************************************************************************/
 28
 29DEFINE_CLK(pll, "pll.0", MCF_CLK);
 30DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
 31DEFINE_CLK(mcfpit0, "mcfpit.0", MCF_CLK);
 32DEFINE_CLK(mcfpit1, "mcfpit.1", MCF_CLK);
 33DEFINE_CLK(mcfpit2, "mcfpit.2", MCF_CLK);
 34DEFINE_CLK(mcfpit3, "mcfpit.3", MCF_CLK);
 35DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
 36DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
 37DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK);
 38DEFINE_CLK(mcfqspi0, "mcfqspi.0", MCF_BUSCLK);
 39DEFINE_CLK(fec0, "fec.0", MCF_BUSCLK);
 40DEFINE_CLK(mcfi2c0, "imx1-i2c.0", MCF_BUSCLK);
 41
 42struct clk *mcf_clks[] = {
 43	&clk_pll,
 44	&clk_sys,
 45	&clk_mcfpit0,
 46	&clk_mcfpit1,
 47	&clk_mcfpit2,
 48	&clk_mcfpit3,
 49	&clk_mcfuart0,
 50	&clk_mcfuart1,
 51	&clk_mcfuart2,
 52	&clk_mcfqspi0,
 53	&clk_fec0,
 54	&clk_mcfi2c0,
 55	NULL
 56};
 57
 58/***************************************************************************/
 59
 60static void __init m528x_qspi_init(void)
 61{
 62#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
 63	/* setup Port QS for QSPI with gpio CS control */
 64	__raw_writeb(0x07, MCFGPIO_PQSPAR);
 65#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
 66}
 67
 68/***************************************************************************/
 69
 70static void __init m528x_i2c_init(void)
 71{
 72#if IS_ENABLED(CONFIG_I2C_IMX)
 73	u16 paspar;
 74
 75	/* setup Port AS Pin Assignment Register for I2C */
 76	/*  set PASPA0 to SCL and PASPA1 to SDA */
 77	paspar = readw(MCFGPIO_PASPAR);
 78	paspar |= 0xF;
 79	writew(paspar, MCFGPIO_PASPAR);
 80#endif /* IS_ENABLED(CONFIG_I2C_IMX) */
 81}
 82
 83/***************************************************************************/
 84
 85static void __init m528x_uarts_init(void)
 86{
 87	u8 port;
 88
 89	/* make sure PUAPAR is set for UART0 and UART1 */
 90	port = readb(MCFGPIO_PUAPAR);
 91	port |= 0x03 | (0x03 << 2);
 92	writeb(port, MCFGPIO_PUAPAR);
 93}
 94
 95/***************************************************************************/
 96
 97static void __init m528x_fec_init(void)
 98{
 99	u16 v16;
100
101	/* Set multi-function pins to ethernet mode for fec0 */
102	v16 = readw(MCFGPIO_PASPAR);
103	writew(v16 | 0xf00, MCFGPIO_PASPAR);
104	writeb(0xc0, MCFGPIO_PEHLPAR);
105}
106
107/***************************************************************************/
108
109#ifdef CONFIG_WILDFIRE
110void wildfire_halt(void)
111{
112	writeb(0, 0x30000007);
113	writeb(0x2, 0x30000007);
114}
115#endif
116
117#ifdef CONFIG_WILDFIREMOD
118void wildfiremod_halt(void)
119{
120	printk(KERN_INFO "WildFireMod hibernating...\n");
121
122	/* Set portE.5 to Digital IO */
123	writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR);
124
125	/* Make portE.5 an output */
126	writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E);
127
128	/* Now toggle portE.5 from low to high */
129	writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E);
130	writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E);
131
132	printk(KERN_EMERG "Failed to hibernate. Halting!\n");
133}
134#endif
135
136void __init config_BSP(char *commandp, int size)
137{
138#ifdef CONFIG_WILDFIRE
139	mach_halt = wildfire_halt;
140#endif
141#ifdef CONFIG_WILDFIREMOD
142	mach_halt = wildfiremod_halt;
143#endif
144	mach_sched_init = hw_timer_init;
145	m528x_uarts_init();
146	m528x_fec_init();
147	m528x_qspi_init();
148	m528x_i2c_init();
149}
150
151/***************************************************************************/