1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /***************************************************************************/ |
3 | |
4 | /* |
5 | * m5272.c -- platform support for ColdFire 5272 based boards |
6 | * |
7 | * Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com) |
8 | * Copyright (C) 2001-2002, SnapGear Inc. (www.snapgear.com) |
9 | */ |
10 | |
11 | /***************************************************************************/ |
12 | |
13 | #include <linux/clkdev.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/param.h> |
16 | #include <linux/init.h> |
17 | #include <linux/io.h> |
18 | #include <linux/phy.h> |
19 | #include <linux/phy_fixed.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 | /* |
29 | * Some platforms need software versions of the GPIO data registers. |
30 | */ |
31 | unsigned short ppdata; |
32 | unsigned char ledbank = 0xff; |
33 | |
34 | /***************************************************************************/ |
35 | |
36 | DEFINE_CLK(pll, "pll.0" , MCF_CLK); |
37 | DEFINE_CLK(sys, "sys.0" , MCF_BUSCLK); |
38 | |
39 | static struct clk_lookup m5272_clk_lookup[] = { |
40 | CLKDEV_INIT(NULL, "pll.0" , &clk_pll), |
41 | CLKDEV_INIT(NULL, "sys.0" , &clk_sys), |
42 | CLKDEV_INIT("mcftmr.0" , NULL, &clk_sys), |
43 | CLKDEV_INIT("mcftmr.1" , NULL, &clk_sys), |
44 | CLKDEV_INIT("mcftmr.2" , NULL, &clk_sys), |
45 | CLKDEV_INIT("mcftmr.3" , NULL, &clk_sys), |
46 | CLKDEV_INIT("mcfuart.0" , NULL, &clk_sys), |
47 | CLKDEV_INIT("mcfuart.1" , NULL, &clk_sys), |
48 | CLKDEV_INIT("mcfqspi.0" , NULL, &clk_sys), |
49 | CLKDEV_INIT("fec.0" , NULL, &clk_sys), |
50 | }; |
51 | |
52 | /***************************************************************************/ |
53 | |
54 | static void __init m5272_uarts_init(void) |
55 | { |
56 | u32 v; |
57 | |
58 | /* Enable the output lines for the serial ports */ |
59 | v = readl(addr: MCFSIM_PBCNT); |
60 | v = (v & ~0x000000ff) | 0x00000055; |
61 | writel(val: v, addr: MCFSIM_PBCNT); |
62 | |
63 | v = readl(addr: MCFSIM_PDCNT); |
64 | v = (v & ~0x000003fc) | 0x000002a8; |
65 | writel(val: v, addr: MCFSIM_PDCNT); |
66 | } |
67 | |
68 | /***************************************************************************/ |
69 | |
70 | static void m5272_cpu_reset(void) |
71 | { |
72 | local_irq_disable(); |
73 | /* Set watchdog to reset, and enabled */ |
74 | __raw_writew(val: 0, addr: MCFSIM_WIRR); |
75 | __raw_writew(val: 1, addr: MCFSIM_WRRR); |
76 | __raw_writew(val: 0, addr: MCFSIM_WCR); |
77 | for (;;) |
78 | /* wait for watchdog to timeout */; |
79 | } |
80 | |
81 | /***************************************************************************/ |
82 | |
83 | void __init config_BSP(char *commandp, int size) |
84 | { |
85 | #if defined (CONFIG_MOD5272) |
86 | /* Set base of device vectors to be 64 */ |
87 | writeb(0x40, MCFSIM_PIVR); |
88 | #endif |
89 | |
90 | #if defined(CONFIG_NETtel) || defined(CONFIG_SCALES) |
91 | /* Copy command line from FLASH to local buffer... */ |
92 | memcpy(commandp, (char *) 0xf0004000, size); |
93 | commandp[size-1] = 0; |
94 | #elif defined(CONFIG_CANCam) |
95 | /* Copy command line from FLASH to local buffer... */ |
96 | memcpy(commandp, (char *) 0xf0010000, size); |
97 | commandp[size-1] = 0; |
98 | #endif |
99 | |
100 | mach_reset = m5272_cpu_reset; |
101 | mach_sched_init = hw_timer_init; |
102 | } |
103 | |
104 | /***************************************************************************/ |
105 | |
106 | /* |
107 | * Some 5272 based boards have the FEC ethernet directly connected to |
108 | * an ethernet switch. In this case we need to use the fixed phy type, |
109 | * and we need to declare it early in boot. |
110 | */ |
111 | static struct fixed_phy_status nettel_fixed_phy_status __initdata = { |
112 | .link = 1, |
113 | .speed = 100, |
114 | .duplex = 0, |
115 | }; |
116 | |
117 | /***************************************************************************/ |
118 | |
119 | static int __init init_BSP(void) |
120 | { |
121 | m5272_uarts_init(); |
122 | fixed_phy_add(PHY_POLL, phy_id: 0, status: &nettel_fixed_phy_status); |
123 | clkdev_add_table(m5272_clk_lookup, ARRAY_SIZE(m5272_clk_lookup)); |
124 | return 0; |
125 | } |
126 | |
127 | arch_initcall(init_BSP); |
128 | |
129 | /***************************************************************************/ |
130 | |