1  /*arch/powerpc/platforms/8xx/mpc86xads_setup.c
2   *
3   * Platform setup for the Freescale mpc86xads board
4   *
5   * Vitaly Bordug <vbordug@ru.mvista.com>
6   *
7   * Copyright 2005 MontaVista Software Inc.
8   *
9   * Heavily modified by Scott Wood <scottwood@freescale.com>
10   * Copyright 2007 Freescale Semiconductor, Inc.
11   *
12   * This file is licensed under the terms of the GNU General Public License
13   * version 2. This program is licensed "as is" without any warranty of any
14   * kind, whether express or implied.
15   */
16  
17  #include <linux/init.h>
18  #include <linux/of_address.h>
19  #include <linux/of_fdt.h>
20  #include <linux/of_platform.h>
21  
22  #include <asm/io.h>
23  #include <asm/machdep.h>
24  #include <asm/time.h>
25  #include <asm/8xx_immap.h>
26  #include <asm/cpm1.h>
27  #include <asm/udbg.h>
28  
29  #include "mpc86xads.h"
30  #include "mpc8xx.h"
31  #include "pic.h"
32  
33  struct cpm_pin {
34  	int port, pin, flags;
35  };
36  
37  static struct cpm_pin mpc866ads_pins[] = {
38  	/* SMC1 */
39  	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
40  	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
41  
42  	/* SMC2 */
43  	{CPM_PORTB, 21, CPM_PIN_INPUT}, /* RX */
44  	{CPM_PORTB, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
45  
46  	/* SCC1 */
47  	{CPM_PORTA, 6, CPM_PIN_INPUT}, /* CLK1 */
48  	{CPM_PORTA, 7, CPM_PIN_INPUT}, /* CLK2 */
49  	{CPM_PORTA, 14, CPM_PIN_INPUT}, /* TX */
50  	{CPM_PORTA, 15, CPM_PIN_INPUT}, /* RX */
51  	{CPM_PORTB, 19, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
52  	{CPM_PORTC, 10, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
53  	{CPM_PORTC, 11, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
54  
55  	/* MII */
56  	{CPM_PORTD, 3, CPM_PIN_OUTPUT},
57  	{CPM_PORTD, 4, CPM_PIN_OUTPUT},
58  	{CPM_PORTD, 5, CPM_PIN_OUTPUT},
59  	{CPM_PORTD, 6, CPM_PIN_OUTPUT},
60  	{CPM_PORTD, 7, CPM_PIN_OUTPUT},
61  	{CPM_PORTD, 8, CPM_PIN_OUTPUT},
62  	{CPM_PORTD, 9, CPM_PIN_OUTPUT},
63  	{CPM_PORTD, 10, CPM_PIN_OUTPUT},
64  	{CPM_PORTD, 11, CPM_PIN_OUTPUT},
65  	{CPM_PORTD, 12, CPM_PIN_OUTPUT},
66  	{CPM_PORTD, 13, CPM_PIN_OUTPUT},
67  	{CPM_PORTD, 14, CPM_PIN_OUTPUT},
68  	{CPM_PORTD, 15, CPM_PIN_OUTPUT},
69  
70  	/* I2C */
71  	{CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
72  	{CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
73  };
74  
init_ioports(void)75  static void __init init_ioports(void)
76  {
77  	int i;
78  
79  	for (i = 0; i < ARRAY_SIZE(mpc866ads_pins); i++) {
80  		struct cpm_pin *pin = &mpc866ads_pins[i];
81  		cpm1_set_pin(pin->port, pin->pin, pin->flags);
82  	}
83  
84  	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
85  	cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
86  	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK1, CPM_CLK_TX);
87  	cpm1_clk_setup(CPM_CLK_SCC1, CPM_CLK2, CPM_CLK_RX);
88  
89  	/* Set FEC1 and FEC2 to MII mode */
90  	clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
91  }
92  
mpc86xads_setup_arch(void)93  static void __init mpc86xads_setup_arch(void)
94  {
95  	struct device_node *np;
96  	u32 __iomem *bcsr_io;
97  
98  	cpm_reset();
99  	init_ioports();
100  
101  	np = of_find_compatible_node(NULL, NULL, "fsl,mpc866ads-bcsr");
102  	if (!np) {
103  		printk(KERN_CRIT "Could not find fsl,mpc866ads-bcsr node\n");
104  		return;
105  	}
106  
107  	bcsr_io = of_iomap(np, 0);
108  	of_node_put(np);
109  
110  	if (bcsr_io == NULL) {
111  		printk(KERN_CRIT "Could not remap BCSR\n");
112  		return;
113  	}
114  
115  	clrbits32(bcsr_io, BCSR1_RS232EN_1 | BCSR1_RS232EN_2 | BCSR1_ETHEN);
116  	iounmap(bcsr_io);
117  }
118  
119  static const struct of_device_id of_bus_ids[] __initconst = {
120  	{ .name = "soc", },
121  	{ .name = "cpm", },
122  	{ .name = "localbus", },
123  	{},
124  };
125  
declare_of_platform_devices(void)126  static int __init declare_of_platform_devices(void)
127  {
128  	of_platform_bus_probe(NULL, of_bus_ids, NULL);
129  
130  	return 0;
131  }
132  machine_device_initcall(mpc86x_ads, declare_of_platform_devices);
133  
define_machine(mpc86x_ads)134  define_machine(mpc86x_ads) {
135  	.name			= "MPC86x ADS",
136  	.compatible		= "fsl,mpc866ads",
137  	.setup_arch		= mpc86xads_setup_arch,
138  	.init_IRQ		= mpc8xx_pic_init,
139  	.get_irq		= mpc8xx_get_irq,
140  	.restart		= mpc8xx_restart,
141  	.calibrate_decr		= mpc8xx_calibrate_decr,
142  	.set_rtc_time		= mpc8xx_set_rtc_time,
143  	.get_rtc_time		= mpc8xx_get_rtc_time,
144  	.progress		= udbg_progress,
145  };
146