1 /*
2  * Board setup routines for the Emerson KSI8560
3  *
4  * Author: Alexandr Smirnov <asmirnov@ru.mvista.com>
5  *
6  * Based on mpc85xx_ads.c maintained by Kumar Gala
7  *
8  * 2008 (c) MontaVista, Software, Inc.  This file is licensed under
9  * the terms of the GNU General Public License version 2.  This program
10  * is licensed "as is" without any warranty of any kind, whether express
11  * or implied.
12  *
13  */
14 
15 #include <linux/stddef.h>
16 #include <linux/kernel.h>
17 #include <linux/pci.h>
18 #include <linux/kdev_t.h>
19 #include <linux/delay.h>
20 #include <linux/seq_file.h>
21 #include <linux/of_platform.h>
22 
23 #include <asm/system.h>
24 #include <asm/time.h>
25 #include <asm/machdep.h>
26 #include <asm/pci-bridge.h>
27 #include <asm/mpic.h>
28 #include <mm/mmu_decl.h>
29 #include <asm/udbg.h>
30 #include <asm/prom.h>
31 
32 #include <sysdev/fsl_soc.h>
33 #include <sysdev/fsl_pci.h>
34 
35 #include <asm/cpm2.h>
36 #include <sysdev/cpm2_pic.h>
37 
38 
39 #define KSI8560_CPLD_HVR		0x04 /* Hardware Version Register */
40 #define KSI8560_CPLD_PVR		0x08 /* PLD Version Register */
41 #define KSI8560_CPLD_RCR1		0x30 /* Reset Command Register 1 */
42 
43 #define KSI8560_CPLD_RCR1_CPUHR		0x80 /* CPU Hard Reset */
44 
45 static void __iomem *cpld_base = NULL;
46 
47 static void machine_restart(char *cmd)
48 {
49 	if (cpld_base)
50 		out_8(cpld_base + KSI8560_CPLD_RCR1, KSI8560_CPLD_RCR1_CPUHR);
51 	else
52 		printk(KERN_ERR "Can't find CPLD base, hang forever\n");
53 
54 	for (;;);
55 }
56 
57 static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
58 {
59 	int cascade_irq;
60 
61 	while ((cascade_irq = cpm2_get_irq()) >= 0)
62 		generic_handle_irq(cascade_irq);
63 
64 	desc->chip->eoi(irq);
65 }
66 
67 static void __init ksi8560_pic_init(void)
68 {
69 	struct mpic *mpic;
70 	struct resource r;
71 	struct device_node *np;
72 #ifdef CONFIG_CPM2
73 	int irq;
74 #endif
75 
76 	np = of_find_node_by_type(NULL, "open-pic");
77 
78 	if (np == NULL) {
79 		printk(KERN_ERR "Could not find open-pic node\n");
80 		return;
81 	}
82 
83 	if (of_address_to_resource(np, 0, &r)) {
84 		printk(KERN_ERR "Could not map mpic register space\n");
85 		of_node_put(np);
86 		return;
87 	}
88 
89 	mpic = mpic_alloc(np, r.start,
90 			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
91 			0, 256, " OpenPIC  ");
92 	BUG_ON(mpic == NULL);
93 	of_node_put(np);
94 
95 	mpic_init(mpic);
96 
97 #ifdef CONFIG_CPM2
98 	/* Setup CPM2 PIC */
99 	np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic");
100 	if (np == NULL) {
101 		printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n");
102 		return;
103 	}
104 	irq = irq_of_parse_and_map(np, 0);
105 
106 	cpm2_pic_init(np);
107 	of_node_put(np);
108 	set_irq_chained_handler(irq, cpm2_cascade);
109 
110 	setup_irq(0, NULL);
111 #endif
112 }
113 
114 #ifdef CONFIG_CPM2
115 /*
116  * Setup I/O ports
117  */
118 struct cpm_pin {
119 	int port, pin, flags;
120 };
121 
122 static struct cpm_pin __initdata ksi8560_pins[] = {
123 	/* SCC1 */
124 	{3, 29, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
125 	{3, 30, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
126 	{3, 31, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
127 
128 	/* SCC2 */
129 	{3, 26, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
130 	{3, 27, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
131 	{3, 28, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
132 
133 	/* FCC1 */
134 	{0, 14, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
135 	{0, 15, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
136 	{0, 16, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
137 	{0, 17, CPM_PIN_INPUT | CPM_PIN_PRIMARY},
138 	{0, 18, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
139 	{0, 19, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
140 	{0, 20, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
141 	{0, 21, CPM_PIN_OUTPUT | CPM_PIN_PRIMARY},
142 	{0, 26, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
143 	{0, 27, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
144 	{0, 28, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
145 	{0, 29, CPM_PIN_OUTPUT | CPM_PIN_SECONDARY},
146 	{0, 30, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
147 	{0, 31, CPM_PIN_INPUT | CPM_PIN_SECONDARY},
148 	{2, 23, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK9 */
149 	{2, 22, CPM_PIN_INPUT | CPM_PIN_PRIMARY}, /* CLK10 */
150 
151 };
152 
153 static void __init init_ioports(void)
154 {
155 	int i;
156 
157 	for (i = 0; i < ARRAY_SIZE(ksi8560_pins); i++) {
158 		struct cpm_pin *pin = &ksi8560_pins[i];
159 		cpm2_set_pin(pin->port, pin->pin, pin->flags);
160 	}
161 
162 	cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_RX);
163 	cpm2_clk_setup(CPM_CLK_SCC1, CPM_BRG1, CPM_CLK_TX);
164 	cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_RX);
165 	cpm2_clk_setup(CPM_CLK_SCC2, CPM_BRG2, CPM_CLK_TX);
166 	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK9, CPM_CLK_RX);
167 	cpm2_clk_setup(CPM_CLK_FCC1, CPM_CLK10, CPM_CLK_TX);
168 }
169 #endif
170 
171 /*
172  * Setup the architecture
173  */
174 static void __init ksi8560_setup_arch(void)
175 {
176 	struct device_node *cpld;
177 
178 	cpld = of_find_compatible_node(NULL, NULL, "emerson,KSI8560-cpld");
179 	if (cpld)
180 		cpld_base = of_iomap(cpld, 0);
181 	else
182 		printk(KERN_ERR "Can't find CPLD in device tree\n");
183 
184 	if (ppc_md.progress)
185 		ppc_md.progress("ksi8560_setup_arch()", 0);
186 
187 #ifdef CONFIG_CPM2
188 	cpm2_reset();
189 	init_ioports();
190 #endif
191 }
192 
193 static void ksi8560_show_cpuinfo(struct seq_file *m)
194 {
195 	uint pvid, svid, phid1;
196 	uint memsize = total_memory;
197 
198 	pvid = mfspr(SPRN_PVR);
199 	svid = mfspr(SPRN_SVR);
200 
201 	seq_printf(m, "Vendor\t\t: Emerson Network Power\n");
202 	seq_printf(m, "Board\t\t: KSI8560\n");
203 
204 	if (cpld_base) {
205 		seq_printf(m, "Hardware rev\t: %d\n",
206 					in_8(cpld_base + KSI8560_CPLD_HVR));
207 		seq_printf(m, "CPLD rev\t: %d\n",
208 					in_8(cpld_base + KSI8560_CPLD_PVR));
209 	} else
210 		seq_printf(m, "Unknown Hardware and CPLD revs\n");
211 
212 	seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
213 	seq_printf(m, "SVR\t\t: 0x%x\n", svid);
214 
215 	/* Display cpu Pll setting */
216 	phid1 = mfspr(SPRN_HID1);
217 	seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
218 
219 	/* Display the amount of memory */
220 	seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
221 }
222 
223 static struct of_device_id __initdata of_bus_ids[] = {
224 	{ .type = "soc", },
225 	{ .name = "cpm", },
226 	{ .name = "localbus", },
227 	{},
228 };
229 
230 static int __init declare_of_platform_devices(void)
231 {
232 	of_platform_bus_probe(NULL, of_bus_ids, NULL);
233 
234 	return 0;
235 }
236 machine_device_initcall(ksi8560, declare_of_platform_devices);
237 
238 /*
239  * Called very early, device-tree isn't unflattened
240  */
241 static int __init ksi8560_probe(void)
242 {
243 	unsigned long root = of_get_flat_dt_root();
244 
245 	return of_flat_dt_is_compatible(root, "emerson,KSI8560");
246 }
247 
248 define_machine(ksi8560) {
249 	.name			= "KSI8560",
250 	.probe			= ksi8560_probe,
251 	.setup_arch		= ksi8560_setup_arch,
252 	.init_IRQ		= ksi8560_pic_init,
253 	.show_cpuinfo		= ksi8560_show_cpuinfo,
254 	.get_irq		= mpic_get_irq,
255 	.restart		= machine_restart,
256 	.calibrate_decr		= generic_calibrate_decr,
257 };
258