kbuild: move utsrelease.h to include/generated
[linux-2.6.git] / arch / powerpc / platforms / 52xx / efika.c
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 <generated/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  */
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 = pci_bus_to_host(bus);
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
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 = pci_bus_to_host(bus);
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
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
130 static void __init efika_pcisetup(void)
131 {}
132 #endif
133
134
135
136 /* ------------------------------------------------------------------------ */
137 /* Platform setup                                                           */
138 /* ------------------------------------------------------------------------ */
139
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
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
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
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
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