1 // SPDX-License-Identifier: GPL-2.0
2 /***************************************************************************/
3
4 /*
5 * m520x.c -- platform support for ColdFire 520x based boards
6 *
7 * Copyright (C) 2005, Freescale (www.freescale.com)
8 * Copyright (C) 2005, Intec Automation (mike@steroidmicros.com)
9 * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com)
10 * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
11 */
12
13 /***************************************************************************/
14
15 #include <linux/clkdev.h>
16 #include <linux/kernel.h>
17 #include <linux/param.h>
18 #include <linux/init.h>
19 #include <linux/io.h>
20 #include <asm/machdep.h>
21 #include <asm/coldfire.h>
22 #include <asm/mcfsim.h>
23 #include <asm/mcfuart.h>
24 #include <asm/mcfclk.h>
25
26 /***************************************************************************/
27
28 DEFINE_CLK(0, "flexbus", 2, MCF_CLK);
29 DEFINE_CLK(0, "fec.0", 12, MCF_CLK);
30 DEFINE_CLK(0, "edma", 17, MCF_CLK);
31 DEFINE_CLK(0, "intc.0", 18, MCF_CLK);
32 DEFINE_CLK(0, "iack.0", 21, MCF_CLK);
33 DEFINE_CLK(0, "imx1-i2c.0", 22, MCF_CLK);
34 DEFINE_CLK(0, "mcfqspi.0", 23, MCF_CLK);
35 DEFINE_CLK(0, "mcfuart.0", 24, MCF_BUSCLK);
36 DEFINE_CLK(0, "mcfuart.1", 25, MCF_BUSCLK);
37 DEFINE_CLK(0, "mcfuart.2", 26, MCF_BUSCLK);
38 DEFINE_CLK(0, "mcftmr.0", 28, MCF_CLK);
39 DEFINE_CLK(0, "mcftmr.1", 29, MCF_CLK);
40 DEFINE_CLK(0, "mcftmr.2", 30, MCF_CLK);
41 DEFINE_CLK(0, "mcftmr.3", 31, MCF_CLK);
42
43 DEFINE_CLK(0, "mcfpit.0", 32, MCF_CLK);
44 DEFINE_CLK(0, "mcfpit.1", 33, MCF_CLK);
45 DEFINE_CLK(0, "mcfeport.0", 34, MCF_CLK);
46 DEFINE_CLK(0, "mcfwdt.0", 35, MCF_CLK);
47 DEFINE_CLK(0, "pll.0", 36, MCF_CLK);
48 DEFINE_CLK(0, "sys.0", 40, MCF_BUSCLK);
49 DEFINE_CLK(0, "gpio.0", 41, MCF_BUSCLK);
50 DEFINE_CLK(0, "sdram.0", 42, MCF_CLK);
51
52 static struct clk_lookup m520x_clk_lookup[] = {
53 CLKDEV_INIT(NULL, "flexbus", &__clk_0_2),
54 CLKDEV_INIT("fec.0", NULL, &__clk_0_12),
55 CLKDEV_INIT("edma", NULL, &__clk_0_17),
56 CLKDEV_INIT("intc.0", NULL, &__clk_0_18),
57 CLKDEV_INIT("iack.0", NULL, &__clk_0_21),
58 CLKDEV_INIT("imx1-i2c.0", NULL, &__clk_0_22),
59 CLKDEV_INIT("mcfqspi.0", NULL, &__clk_0_23),
60 CLKDEV_INIT("mcfuart.0", NULL, &__clk_0_24),
61 CLKDEV_INIT("mcfuart.1", NULL, &__clk_0_25),
62 CLKDEV_INIT("mcfuart.2", NULL, &__clk_0_26),
63 CLKDEV_INIT("mcftmr.0", NULL, &__clk_0_28),
64 CLKDEV_INIT("mcftmr.1", NULL, &__clk_0_29),
65 CLKDEV_INIT("mcftmr.2", NULL, &__clk_0_30),
66 CLKDEV_INIT("mcftmr.3", NULL, &__clk_0_31),
67 CLKDEV_INIT("mcfpit.0", NULL, &__clk_0_32),
68 CLKDEV_INIT("mcfpit.1", NULL, &__clk_0_33),
69 CLKDEV_INIT("mcfeport.0", NULL, &__clk_0_34),
70 CLKDEV_INIT("mcfwdt.0", NULL, &__clk_0_35),
71 CLKDEV_INIT(NULL, "pll.0", &__clk_0_36),
72 CLKDEV_INIT(NULL, "sys.0", &__clk_0_40),
73 CLKDEV_INIT("gpio.0", NULL, &__clk_0_41),
74 CLKDEV_INIT("sdram.0", NULL, &__clk_0_42),
75 };
76
77 static struct clk * const enable_clks[] __initconst = {
78 &__clk_0_2, /* flexbus */
79 &__clk_0_18, /* intc.0 */
80 &__clk_0_21, /* iack.0 */
81 &__clk_0_24, /* mcfuart.0 */
82 &__clk_0_25, /* mcfuart.1 */
83 &__clk_0_26, /* mcfuart.2 */
84
85 &__clk_0_32, /* mcfpit.0 */
86 &__clk_0_33, /* mcfpit.1 */
87 &__clk_0_34, /* mcfeport.0 */
88 &__clk_0_36, /* pll.0 */
89 &__clk_0_40, /* sys.0 */
90 &__clk_0_41, /* gpio.0 */
91 &__clk_0_42, /* sdram.0 */
92 };
93
94 static struct clk * const disable_clks[] __initconst = {
95 &__clk_0_12, /* fec.0 */
96 &__clk_0_17, /* edma */
97 &__clk_0_22, /* imx1-i2c.0 */
98 &__clk_0_23, /* mcfqspi.0 */
99 &__clk_0_28, /* mcftmr.0 */
100 &__clk_0_29, /* mcftmr.1 */
101 &__clk_0_30, /* mcftmr.2 */
102 &__clk_0_31, /* mcftmr.3 */
103 &__clk_0_35, /* mcfwdt.0 */
104 };
105
106
107 static void __init m520x_clk_init(void)
108 {
109 unsigned i;
110
111 /* make sure these clocks are enabled */
112 for (i = 0; i < ARRAY_SIZE(enable_clks); ++i)
113 __clk_init_enabled(enable_clks[i]);
114 /* make sure these clocks are disabled */
115 for (i = 0; i < ARRAY_SIZE(disable_clks); ++i)
116 __clk_init_disabled(disable_clks[i]);
117
118 clkdev_add_table(m520x_clk_lookup, ARRAY_SIZE(m520x_clk_lookup));
119 }
120
121 /***************************************************************************/
122
123 static void __init m520x_qspi_init(void)
124 {
125 #if IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI)
126 u16 par;
127 /* setup Port QS for QSPI with gpio CS control */
128 writeb(0x3f, MCF_GPIO_PAR_QSPI);
129 /* make U1CTS and U2RTS gpio for cs_control */
130 par = readw(MCF_GPIO_PAR_UART);
131 par &= 0x00ff;
132 writew(par, MCF_GPIO_PAR_UART);
133 #endif /* IS_ENABLED(CONFIG_SPI_COLDFIRE_QSPI) */
134 }
135
136 /***************************************************************************/
137
138 static void __init m520x_i2c_init(void)
139 {
140 #if IS_ENABLED(CONFIG_I2C_IMX)
141 u8 par;
142
143 /* setup Port FECI2C Pin Assignment Register for I2C */
144 /* set PAR_SCL to SCL and PAR_SDA to SDA */
145 par = readb(MCF_GPIO_PAR_FECI2C);
146 par |= 0x0f;
147 writeb(par, MCF_GPIO_PAR_FECI2C);
148 #endif /* IS_ENABLED(CONFIG_I2C_IMX) */
149 }
150
151 /***************************************************************************/
152
153 static void __init m520x_uarts_init(void)
154 {
155 u16 par;
156 u8 par2;
157
158 /* UART0 and UART1 GPIO pin setup */
159 par = readw(MCF_GPIO_PAR_UART);
160 par |= MCF_GPIO_PAR_UART_PAR_UTXD0 | MCF_GPIO_PAR_UART_PAR_URXD0;
161 par |= MCF_GPIO_PAR_UART_PAR_UTXD1 | MCF_GPIO_PAR_UART_PAR_URXD1;
162 writew(par, MCF_GPIO_PAR_UART);
163
164 /* UART1 GPIO pin setup */
165 par2 = readb(MCF_GPIO_PAR_FECI2C);
166 par2 &= ~0x0F;
167 par2 |= MCF_GPIO_PAR_FECI2C_PAR_SCL_UTXD2 |
168 MCF_GPIO_PAR_FECI2C_PAR_SDA_URXD2;
169 writeb(par2, MCF_GPIO_PAR_FECI2C);
170 }
171
172 /***************************************************************************/
173
174 static void __init m520x_fec_init(void)
175 {
176 u8 v;
177
178 /* Set multi-function pins to ethernet mode */
179 v = readb(MCF_GPIO_PAR_FEC);
180 writeb(v | 0xf0, MCF_GPIO_PAR_FEC);
181
182 v = readb(MCF_GPIO_PAR_FECI2C);
183 writeb(v | 0x0f, MCF_GPIO_PAR_FECI2C);
184 }
185
186 /***************************************************************************/
187
188 void __init config_BSP(char *commandp, int size)
189 {
190 mach_sched_init = hw_timer_init;
191 m520x_clk_init();
192 m520x_uarts_init();
193 m520x_fec_init();
194 m520x_qspi_init();
195 m520x_i2c_init();
196 }
197
198 /***************************************************************************/
199
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