• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 /*
2  * Efika 5K2 platform code
3  * Some code really inspired from the lite5200b platform.
4  *
5  * Copyright (C) 2006 bplan GmbH
6  *
7  * This file is licensed under the terms of the GNU General Public License
8  * version 2. This program is licensed "as is" without any warranty of any
9  * kind, whether express or implied.
10  */
11 
12 #include <linux/init.h>
13 #include <linux/utsrelease.h>
14 #include <linux/pci.h>
15 #include <linux/of.h>
16 #include <asm/prom.h>
17 #include <asm/time.h>
18 #include <asm/machdep.h>
19 #include <asm/rtas.h>
20 #include <asm/mpc52xx.h>
21 
22 #define EFIKA_PLATFORM_NAME "Efika"
23 
24 
25 /* ------------------------------------------------------------------------ */
26 /* PCI accesses thru RTAS                                                   */
27 /* ------------------------------------------------------------------------ */
28 
29 #ifdef CONFIG_PCI
30 
31 /*
32  * Access functions for PCI config space using RTAS calls.
33  */
rtas_read_config(struct pci_bus * bus,unsigned int devfn,int offset,int len,u32 * val)34 static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
35 			    int len, u32 * val)
36 {
37 	struct pci_controller *hose = bus->sysdata;
38 	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
39 	    | (((bus->number - hose->first_busno) & 0xff) << 16)
40 	    | (hose->global_number << 24);
41 	int ret = -1;
42 	int rval;
43 
44 	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
45 	*val = ret;
46 	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
47 }
48 
rtas_write_config(struct pci_bus * bus,unsigned int devfn,int offset,int len,u32 val)49 static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
50 			     int offset, int len, u32 val)
51 {
52 	struct pci_controller *hose = bus->sysdata;
53 	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
54 	    | (((bus->number - hose->first_busno) & 0xff) << 16)
55 	    | (hose->global_number << 24);
56 	int rval;
57 
58 	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
59 			 addr, len, val);
60 	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
61 }
62 
63 static struct pci_ops rtas_pci_ops = {
64 	.read = rtas_read_config,
65 	.write = rtas_write_config,
66 };
67 
68 
efika_pcisetup(void)69 static void __init efika_pcisetup(void)
70 {
71 	const int *bus_range;
72 	int len;
73 	struct pci_controller *hose;
74 	struct device_node *root;
75 	struct device_node *pcictrl;
76 
77 	root = of_find_node_by_path("/");
78 	if (root == NULL) {
79 		printk(KERN_WARNING EFIKA_PLATFORM_NAME
80 		       ": Unable to find the root node\n");
81 		return;
82 	}
83 
84 	for (pcictrl = NULL;;) {
85 		pcictrl = of_get_next_child(root, pcictrl);
86 		if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0))
87 			break;
88 	}
89 
90 	of_node_put(root);
91 
92 	if (pcictrl == NULL) {
93 		printk(KERN_WARNING EFIKA_PLATFORM_NAME
94 		       ": Unable to find the PCI bridge node\n");
95 		return;
96 	}
97 
98 	bus_range = of_get_property(pcictrl, "bus-range", &len);
99 	if (bus_range == NULL || len < 2 * sizeof(int)) {
100 		printk(KERN_WARNING EFIKA_PLATFORM_NAME
101 		       ": Can't get bus-range for %s\n", pcictrl->full_name);
102 		return;
103 	}
104 
105 	if (bus_range[1] == bus_range[0])
106 		printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
107 		       bus_range[0]);
108 	else
109 		printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
110 		       bus_range[0], bus_range[1]);
111 	printk(" controlled by %s\n", pcictrl->full_name);
112 	printk("\n");
113 
114 	hose = pcibios_alloc_controller(of_node_get(pcictrl));
115 	if (!hose) {
116 		printk(KERN_WARNING EFIKA_PLATFORM_NAME
117 		       ": Can't allocate PCI controller structure for %s\n",
118 		       pcictrl->full_name);
119 		return;
120 	}
121 
122 	hose->first_busno = bus_range[0];
123 	hose->last_busno = bus_range[1];
124 	hose->ops = &rtas_pci_ops;
125 
126 	pci_process_bridge_OF_ranges(hose, pcictrl, 0);
127 }
128 
129 #else
efika_pcisetup(void)130 static void __init efika_pcisetup(void)
131 {}
132 #endif
133 
134 
135 
136 /* ------------------------------------------------------------------------ */
137 /* Platform setup                                                           */
138 /* ------------------------------------------------------------------------ */
139 
efika_show_cpuinfo(struct seq_file * m)140 static void efika_show_cpuinfo(struct seq_file *m)
141 {
142 	struct device_node *root;
143 	const char *revision;
144 	const char *codegendescription;
145 	const char *codegenvendor;
146 
147 	root = of_find_node_by_path("/");
148 	if (!root)
149 		return;
150 
151 	revision = of_get_property(root, "revision", NULL);
152 	codegendescription = of_get_property(root, "CODEGEN,description", NULL);
153 	codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);
154 
155 	if (codegendescription)
156 		seq_printf(m, "machine\t\t: %s\n", codegendescription);
157 	else
158 		seq_printf(m, "machine\t\t: Efika\n");
159 
160 	if (revision)
161 		seq_printf(m, "revision\t: %s\n", revision);
162 
163 	if (codegenvendor)
164 		seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
165 
166 	of_node_put(root);
167 }
168 
169 #ifdef CONFIG_PM
efika_suspend_prepare(void __iomem * mbar)170 static void efika_suspend_prepare(void __iomem *mbar)
171 {
172 	u8 pin = 4;	/* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
173 	u8 level = 1;	/* wakeup on high level */
174 	/* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
175 	mpc52xx_set_wakeup_gpio(pin, level);
176 }
177 #endif
178 
efika_setup_arch(void)179 static void __init efika_setup_arch(void)
180 {
181 	rtas_initialize();
182 
183 	/* Map important registers from the internal memory map */
184 	mpc52xx_map_common_devices();
185 
186 	efika_pcisetup();
187 
188 #ifdef CONFIG_PM
189 	mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare;
190 	mpc52xx_pm_init();
191 #endif
192 
193 	if (ppc_md.progress)
194 		ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
195 }
196 
efika_probe(void)197 static int __init efika_probe(void)
198 {
199 	char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
200 					  "model", NULL);
201 
202 	if (model == NULL)
203 		return 0;
204 	if (strcmp(model, "EFIKA5K2"))
205 		return 0;
206 
207 	ISA_DMA_THRESHOLD = ~0L;
208 	DMA_MODE_READ = 0x44;
209 	DMA_MODE_WRITE = 0x48;
210 
211 	return 1;
212 }
213 
define_machine(efika)214 define_machine(efika)
215 {
216 	.name			= EFIKA_PLATFORM_NAME,
217 	.probe			= efika_probe,
218 	.setup_arch		= efika_setup_arch,
219 	.init			= mpc52xx_declare_of_platform_devices,
220 	.show_cpuinfo		= efika_show_cpuinfo,
221 	.init_IRQ		= mpc52xx_init_irq,
222 	.get_irq		= mpc52xx_get_irq,
223 	.restart		= rtas_restart,
224 	.power_off		= rtas_power_off,
225 	.halt			= rtas_halt,
226 	.set_rtc_time		= rtas_set_rtc_time,
227 	.get_rtc_time		= rtas_get_rtc_time,
228 	.progress		= rtas_progress,
229 	.get_boot_time		= rtas_get_boot_time,
230 	.calibrate_decr		= generic_calibrate_decr,
231 #ifdef CONFIG_PCI
232 	.phys_mem_access_prot	= pci_phys_mem_access_prot,
233 #endif
234 };
235 
236