1 /*
2  * Platform setup for the Freescale mpc885ads board
3  *
4  * Vitaly Bordug <vbordug@ru.mvista.com>
5  *
6  * Copyright 2005 MontaVista Software Inc.
7  *
8  * Heavily modified by Scott Wood <scottwood@freescale.com>
9  * Copyright 2007 Freescale Semiconductor, Inc.
10  *
11  * This file is licensed under the terms of the GNU General Public License
12  * version 2. This program is licensed "as is" without any warranty of any
13  * kind, whether express or implied.
14  */
15 
16 #include <linux/init.h>
17 #include <linux/module.h>
18 #include <linux/param.h>
19 #include <linux/string.h>
20 #include <linux/ioport.h>
21 #include <linux/device.h>
22 #include <linux/delay.h>
23 
24 #include <linux/fsl_devices.h>
25 #include <linux/mii.h>
26 #include <linux/of_address.h>
27 #include <linux/of_fdt.h>
28 #include <linux/of_platform.h>
29 
30 #include <asm/delay.h>
31 #include <asm/io.h>
32 #include <asm/machdep.h>
33 #include <asm/page.h>
34 #include <asm/processor.h>
35 #include <asm/time.h>
36 #include <asm/8xx_immap.h>
37 #include <asm/cpm1.h>
38 #include <asm/udbg.h>
39 
40 #include "mpc885ads.h"
41 #include "mpc8xx.h"
42 #include "pic.h"
43 
44 static u32 __iomem *bcsr, *bcsr5;
45 
46 struct cpm_pin {
47 	int port, pin, flags;
48 };
49 
50 static struct cpm_pin mpc885ads_pins[] = {
51 	/* SMC1 */
52 	{CPM_PORTB, 24, CPM_PIN_INPUT}, /* RX */
53 	{CPM_PORTB, 25, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
54 
55 	/* SMC2 */
56 #ifndef CONFIG_MPC8xx_SECOND_ETH_FEC2
57 	{CPM_PORTE, 21, CPM_PIN_INPUT}, /* RX */
58 	{CPM_PORTE, 20, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TX */
59 #endif
60 
61 	/* SCC3 */
62 	{CPM_PORTA, 9, CPM_PIN_INPUT}, /* RX */
63 	{CPM_PORTA, 8, CPM_PIN_INPUT}, /* TX */
64 	{CPM_PORTC, 4, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* RENA */
65 	{CPM_PORTC, 5, CPM_PIN_INPUT | CPM_PIN_SECONDARY | CPM_PIN_GPIO}, /* CLSN */
66 	{CPM_PORTE, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY}, /* TENA */
67 	{CPM_PORTE, 17, CPM_PIN_INPUT}, /* CLK5 */
68 	{CPM_PORTE, 16, CPM_PIN_INPUT}, /* CLK6 */
69 
70 	/* MII1 */
71 	{CPM_PORTA, 0, CPM_PIN_INPUT},
72 	{CPM_PORTA, 1, CPM_PIN_INPUT},
73 	{CPM_PORTA, 2, CPM_PIN_INPUT},
74 	{CPM_PORTA, 3, CPM_PIN_INPUT},
75 	{CPM_PORTA, 4, CPM_PIN_OUTPUT},
76 	{CPM_PORTA, 10, CPM_PIN_OUTPUT},
77 	{CPM_PORTA, 11, CPM_PIN_OUTPUT},
78 	{CPM_PORTB, 19, CPM_PIN_INPUT},
79 	{CPM_PORTB, 31, CPM_PIN_INPUT},
80 	{CPM_PORTC, 12, CPM_PIN_INPUT},
81 	{CPM_PORTC, 13, CPM_PIN_INPUT},
82 	{CPM_PORTE, 30, CPM_PIN_OUTPUT},
83 	{CPM_PORTE, 31, CPM_PIN_OUTPUT},
84 
85 	/* MII2 */
86 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
87 	{CPM_PORTE, 14, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
88 	{CPM_PORTE, 15, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
89 	{CPM_PORTE, 16, CPM_PIN_OUTPUT},
90 	{CPM_PORTE, 17, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
91 	{CPM_PORTE, 18, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
92 	{CPM_PORTE, 19, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
93 	{CPM_PORTE, 20, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
94 	{CPM_PORTE, 21, CPM_PIN_OUTPUT},
95 	{CPM_PORTE, 22, CPM_PIN_OUTPUT},
96 	{CPM_PORTE, 23, CPM_PIN_OUTPUT},
97 	{CPM_PORTE, 24, CPM_PIN_OUTPUT},
98 	{CPM_PORTE, 25, CPM_PIN_OUTPUT},
99 	{CPM_PORTE, 26, CPM_PIN_OUTPUT},
100 	{CPM_PORTE, 27, CPM_PIN_OUTPUT},
101 	{CPM_PORTE, 28, CPM_PIN_OUTPUT},
102 	{CPM_PORTE, 29, CPM_PIN_OUTPUT},
103 #endif
104 	/* I2C */
105 	{CPM_PORTB, 26, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
106 	{CPM_PORTB, 27, CPM_PIN_INPUT | CPM_PIN_OPENDRAIN},
107 };
108 
109 static void __init init_ioports(void)
110 {
111 	int i;
112 
113 	for (i = 0; i < ARRAY_SIZE(mpc885ads_pins); i++) {
114 		struct cpm_pin *pin = &mpc885ads_pins[i];
115 		cpm1_set_pin(pin->port, pin->pin, pin->flags);
116 	}
117 
118 	cpm1_clk_setup(CPM_CLK_SMC1, CPM_BRG1, CPM_CLK_RTX);
119 	cpm1_clk_setup(CPM_CLK_SMC2, CPM_BRG2, CPM_CLK_RTX);
120 	cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK5, CPM_CLK_TX);
121 	cpm1_clk_setup(CPM_CLK_SCC3, CPM_CLK6, CPM_CLK_RX);
122 
123 	/* Set FEC1 and FEC2 to MII mode */
124 	clrbits32(&mpc8xx_immr->im_cpm.cp_cptr, 0x00000180);
125 }
126 
127 static void __init mpc885ads_setup_arch(void)
128 {
129 	struct device_node *np;
130 
131 	cpm_reset();
132 	init_ioports();
133 
134 	np = of_find_compatible_node(NULL, NULL, "fsl,mpc885ads-bcsr");
135 	if (!np) {
136 		printk(KERN_CRIT "Could not find fsl,mpc885ads-bcsr node\n");
137 		return;
138 	}
139 
140 	bcsr = of_iomap(np, 0);
141 	bcsr5 = of_iomap(np, 1);
142 	of_node_put(np);
143 
144 	if (!bcsr || !bcsr5) {
145 		printk(KERN_CRIT "Could not remap BCSR\n");
146 		return;
147 	}
148 
149 	clrbits32(&bcsr[1], BCSR1_RS232EN_1);
150 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
151 	setbits32(&bcsr[1], BCSR1_RS232EN_2);
152 #else
153 	clrbits32(&bcsr[1], BCSR1_RS232EN_2);
154 #endif
155 
156 	clrbits32(bcsr5, BCSR5_MII1_EN);
157 	setbits32(bcsr5, BCSR5_MII1_RST);
158 	udelay(1000);
159 	clrbits32(bcsr5, BCSR5_MII1_RST);
160 
161 #ifdef CONFIG_MPC8xx_SECOND_ETH_FEC2
162 	clrbits32(bcsr5, BCSR5_MII2_EN);
163 	setbits32(bcsr5, BCSR5_MII2_RST);
164 	udelay(1000);
165 	clrbits32(bcsr5, BCSR5_MII2_RST);
166 #else
167 	setbits32(bcsr5, BCSR5_MII2_EN);
168 #endif
169 
170 #ifdef CONFIG_MPC8xx_SECOND_ETH_SCC3
171 	clrbits32(&bcsr[4], BCSR4_ETH10_RST);
172 	udelay(1000);
173 	setbits32(&bcsr[4], BCSR4_ETH10_RST);
174 
175 	setbits32(&bcsr[1], BCSR1_ETHEN);
176 
177 	np = of_find_node_by_path("/soc@ff000000/cpm@9c0/serial@a80");
178 #else
179 	np = of_find_node_by_path("/soc@ff000000/cpm@9c0/ethernet@a40");
180 #endif
181 
182 	/* The SCC3 enet registers overlap the SMC1 registers, so
183 	 * one of the two must be removed from the device tree.
184 	 */
185 
186 	if (np) {
187 		of_detach_node(np);
188 		of_node_put(np);
189 	}
190 }
191 
192 static const struct of_device_id of_bus_ids[] __initconst = {
193 	{ .name = "soc", },
194 	{ .name = "cpm", },
195 	{ .name = "localbus", },
196 	{},
197 };
198 
199 static int __init declare_of_platform_devices(void)
200 {
201 	/* Publish the QE devices */
202 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
203 
204 	return 0;
205 }
206 machine_device_initcall(mpc885_ads, declare_of_platform_devices);
207 
208 define_machine(mpc885_ads) {
209 	.name			= "Freescale MPC885 ADS",
210 	.compatible		= "fsl,mpc885ads",
211 	.setup_arch		= mpc885ads_setup_arch,
212 	.init_IRQ		= mpc8xx_pic_init,
213 	.get_irq		= mpc8xx_get_irq,
214 	.restart		= mpc8xx_restart,
215 	.calibrate_decr		= mpc8xx_calibrate_decr,
216 	.progress		= udbg_progress,
217 };
218