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/clkdev.h>
 17#include <linux/kernel.h>
 18#include <linux/param.h>
 19#include <linux/init.h>
 20#include <linux/platform_device.h>
 21#include <linux/io.h>
 22#include <asm/machdep.h>
 23#include <asm/coldfire.h>
 24#include <asm/mcfsim.h>
 25#include <asm/mcfuart.h>
 26#include <asm/mcfclk.h>
 27
 28/***************************************************************************/
 29
 30DEFINE_CLK(pll, "pll.0", MCF_CLK);
 31DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
 32
 33static struct clk_lookup m528x_clk_lookup[] = {
 34	CLKDEV_INIT(NULL, "pll.0", &clk_pll),
 35	CLKDEV_INIT(NULL, "sys.0", &clk_sys),
 36	CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),
 37	CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),
 38	CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),
 39	CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),
 40	CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
 41	CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
 42	CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),
 43	CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
 44	CLKDEV_INIT("fec.0", NULL, &clk_sys),
 45	CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
 46};
 47
 48/***************************************************************************/
 49
 50static void __init m528x_qspi_init(void)
 51{
 52#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
 53	/* setup Port QS for QSPI with gpio CS control */
 54	__raw_writeb(0x07, MCFGPIO_PQSPAR);
 55#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
 56}
 57
 58/***************************************************************************/
 59
 60static void __init m528x_i2c_init(void)
 61{
 62#if IS_ENABLED(CONFIG_I2C_IMX)
 63	u16 paspar;
 64
 65	/* setup Port AS Pin Assignment Register for I2C */
 66	/*  set PASPA0 to SCL and PASPA1 to SDA */
 67	paspar = readw(MCFGPIO_PASPAR);
 68	paspar |= 0xF;
 69	writew(paspar, MCFGPIO_PASPAR);
 70#endif /* IS_ENABLED(CONFIG_I2C_IMX) */
 71}
 72
 73/***************************************************************************/
 74
 75static void __init m528x_uarts_init(void)
 76{
 77	u8 port;
 78
 79	/* make sure PUAPAR is set for UART0 and UART1 */
 80	port = readb(MCFGPIO_PUAPAR);
 81	port |= 0x03 | (0x03 << 2);
 82	writeb(port, MCFGPIO_PUAPAR);
 83}
 84
 85/***************************************************************************/
 86
 87static void __init m528x_fec_init(void)
 88{
 89	u16 v16;
 90
 91	/* Set multi-function pins to ethernet mode for fec0 */
 92	v16 = readw(MCFGPIO_PASPAR);
 93	writew(v16 | 0xf00, MCFGPIO_PASPAR);
 94	writeb(0xc0, MCFGPIO_PEHLPAR);
 95}
 96
 97/***************************************************************************/
 98
 99#ifdef CONFIG_WILDFIRE
100void wildfire_halt(void)
101{
102	writeb(0, 0x30000007);
103	writeb(0x2, 0x30000007);
104}
105#endif
106
107#ifdef CONFIG_WILDFIREMOD
108void wildfiremod_halt(void)
109{
110	printk(KERN_INFO "WildFireMod hibernating...\n");
111
112	/* Set portE.5 to Digital IO */
113	writew(readw(MCFGPIO_PEPAR) & ~(1 << (5 * 2)), MCFGPIO_PEPAR);
114
115	/* Make portE.5 an output */
116	writeb(readb(MCFGPIO_PDDR_E) | (1 << 5), MCFGPIO_PDDR_E);
117
118	/* Now toggle portE.5 from low to high */
119	writeb(readb(MCFGPIO_PODR_E) & ~(1 << 5), MCFGPIO_PODR_E);
120	writeb(readb(MCFGPIO_PODR_E) | (1 << 5), MCFGPIO_PODR_E);
121
122	printk(KERN_EMERG "Failed to hibernate. Halting!\n");
123}
124#endif
125
126void __init config_BSP(char *commandp, int size)
127{
128#ifdef CONFIG_WILDFIRE
129	mach_halt = wildfire_halt;
130#endif
131#ifdef CONFIG_WILDFIREMOD
132	mach_halt = wildfiremod_halt;
133#endif
134	mach_sched_init = hw_timer_init;
135	m528x_uarts_init();
136	m528x_fec_init();
137	m528x_qspi_init();
138	m528x_i2c_init();
139
140	clkdev_add_table(m528x_clk_lookup, ARRAY_SIZE(m528x_clk_lookup));
141}
142
143/***************************************************************************/