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
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
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
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
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
100 void wildfire_halt(void)
101 {
102 writeb(0, 0x30000007);
103 writeb(0x2, 0x30000007);
104 }
105 #endif
106
107 #ifdef CONFIG_WILDFIREMOD
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
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
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