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 
30 DEFINE_CLK(pll, "pll.0", MCF_CLK);
31 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
32 
33 static 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 
m528x_qspi_init(void)50 static 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 
m528x_i2c_init(void)60 static 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 
m528x_uarts_init(void)75 static 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 
m528x_fec_init(void)87 static 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
wildfire_halt(void)100 void wildfire_halt(void)
101 {
102 	writeb(0, 0x30000007);
103 	writeb(0x2, 0x30000007);
104 }
105 #endif
106 
107 #ifdef CONFIG_WILDFIREMOD
wildfiremod_halt(void)108 void 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 
config_BSP(char * commandp,int size)126 void __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 /***************************************************************************/
144