1// SPDX-License-Identifier: GPL-2.0
2/***************************************************************************/
3
4/*
5 * m527x.c -- platform support for ColdFire 527x based boards
6 *
7 * Sub-architcture dependent initialization code for the Freescale
8 * 5270/5271 and 5274/5275 CPUs.
9 *
10 * Copyright (C) 1999-2004, Greg Ungerer (gerg@snapgear.com)
11 * Copyright (C) 2001-2004, 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/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);
31
32static struct clk_lookup m527x_clk_lookup[] = {
33 CLKDEV_INIT(NULL, "pll.0", &clk_pll),
34 CLKDEV_INIT(NULL, "sys.0", &clk_sys),
35 CLKDEV_INIT("mcfpit.0", NULL, &clk_pll),
36 CLKDEV_INIT("mcfpit.1", NULL, &clk_pll),
37 CLKDEV_INIT("mcfpit.2", NULL, &clk_pll),
38 CLKDEV_INIT("mcfpit.3", NULL, &clk_pll),
39 CLKDEV_INIT("mcfuart.0", NULL, &clk_sys),
40 CLKDEV_INIT("mcfuart.1", NULL, &clk_sys),
41 CLKDEV_INIT("mcfuart.2", NULL, &clk_sys),
42 CLKDEV_INIT("mcfqspi.0", NULL, &clk_sys),
43 CLKDEV_INIT("fec.0", NULL, &clk_sys),
44 CLKDEV_INIT("fec.1", NULL, &clk_sys),
45 CLKDEV_INIT("imx1-i2c.0", NULL, &clk_sys),
46};
47
48/***************************************************************************/
49
50static void __init m527x_qspi_init(void)
51{
52#if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
53#if defined(CONFIG_M5271)
54 u16 par;
55
56 /* setup QSPS pins for QSPI with gpio CS control */
57 writeb(0x1f, MCFGPIO_PAR_QSPI);
58 /* and CS2 & CS3 as gpio */
59 par = readw(MCFGPIO_PAR_TIMER);
60 par &= 0x3f3f;
61 writew(par, MCFGPIO_PAR_TIMER);
62#elif defined(CONFIG_M5275)
63 /* setup QSPS pins for QSPI with gpio CS control */
64 writew(0x003e, MCFGPIO_PAR_QSPI);
65#endif
66#endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
67}
68
69/***************************************************************************/
70
71static void __init m527x_i2c_init(void)
72{
73#if IS_ENABLED(CONFIG_I2C_IMX)
74#if defined(CONFIG_M5271)
75 u8 par;
76
77 /* setup Port FECI2C Pin Assignment Register for I2C */
78 /* set PAR_SCL to SCL and PAR_SDA to SDA */
79 par = readb(MCFGPIO_PAR_FECI2C);
80 par |= 0x0f;
81 writeb(par, MCFGPIO_PAR_FECI2C);
82#elif defined(CONFIG_M5275)
83 u16 par;
84
85 /* setup Port FECI2C Pin Assignment Register for I2C */
86 /* set PAR_SCL to SCL and PAR_SDA to SDA */
87 par = readw(MCFGPIO_PAR_FECI2C);
88 par |= 0x0f;
89 writew(par, MCFGPIO_PAR_FECI2C);
90#endif
91#endif /* IS_ENABLED(CONFIG_I2C_IMX) */
92}
93
94/***************************************************************************/
95
96static void __init m527x_uarts_init(void)
97{
98 u16 sepmask;
99
100 /*
101 * External Pin Mask Setting & Enable External Pin for Interface
102 */
103 sepmask = readw(addr: MCFGPIO_PAR_UART);
104 sepmask |= UART0_ENABLE_MASK | UART1_ENABLE_MASK | UART2_ENABLE_MASK;
105 writew(val: sepmask, addr: MCFGPIO_PAR_UART);
106}
107
108/***************************************************************************/
109
110static void __init m527x_fec_init(void)
111{
112 u8 v;
113
114 /* Set multi-function pins to ethernet mode for fec0 */
115#if defined(CONFIG_M5271)
116 v = readb(MCFGPIO_PAR_FECI2C);
117 writeb(v | 0xf0, MCFGPIO_PAR_FECI2C);
118#else
119 u16 par;
120
121 par = readw(addr: MCFGPIO_PAR_FECI2C);
122 writew(val: par | 0xf00, addr: MCFGPIO_PAR_FECI2C);
123 v = readb(addr: MCFGPIO_PAR_FEC0HL);
124 writeb(val: v | 0xc0, addr: MCFGPIO_PAR_FEC0HL);
125
126 /* Set multi-function pins to ethernet mode for fec1 */
127 par = readw(addr: MCFGPIO_PAR_FECI2C);
128 writew(val: par | 0xa0, addr: MCFGPIO_PAR_FECI2C);
129 v = readb(addr: MCFGPIO_PAR_FEC1HL);
130 writeb(val: v | 0xc0, addr: MCFGPIO_PAR_FEC1HL);
131#endif
132}
133
134/***************************************************************************/
135
136void __init config_BSP(char *commandp, int size)
137{
138 mach_sched_init = hw_timer_init;
139 m527x_uarts_init();
140 m527x_fec_init();
141 m527x_qspi_init();
142 m527x_i2c_init();
143 clkdev_add_table(m527x_clk_lookup, ARRAY_SIZE(m527x_clk_lookup));
144}
145
146/***************************************************************************/
147

source code of linux/arch/m68k/coldfire/m527x.c