Merge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
[linux-2.6-microblaze.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/dma.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_each_child_of_node(root, pcictrl)
85                 if (of_node_name_eq(pcictrl, "pci"))
86                         break;
87
88         of_node_put(root);
89
90         if (pcictrl == NULL) {
91                 printk(KERN_WARNING EFIKA_PLATFORM_NAME
92                        ": Unable to find the PCI bridge node\n");
93                 return;
94         }
95
96         bus_range = of_get_property(pcictrl, "bus-range", &len);
97         if (bus_range == NULL || len < 2 * sizeof(int)) {
98                 printk(KERN_WARNING EFIKA_PLATFORM_NAME
99                        ": Can't get bus-range for %pOF\n", pcictrl);
100                 goto out_put;
101         }
102
103         if (bus_range[1] == bus_range[0])
104                 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
105                        bus_range[0]);
106         else
107                 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
108                        bus_range[0], bus_range[1]);
109         printk(" controlled by %pOF\n", pcictrl);
110         printk("\n");
111
112         hose = pcibios_alloc_controller(pcictrl);
113         if (!hose) {
114                 printk(KERN_WARNING EFIKA_PLATFORM_NAME
115                        ": Can't allocate PCI controller structure for %pOF\n",
116                        pcictrl);
117                 goto out_put;
118         }
119
120         hose->first_busno = bus_range[0];
121         hose->last_busno = bus_range[1];
122         hose->ops = &rtas_pci_ops;
123
124         pci_process_bridge_OF_ranges(hose, pcictrl, 0);
125         return;
126 out_put:
127         of_node_put(pcictrl);
128 }
129
130 #else
131 static void __init efika_pcisetup(void)
132 {}
133 #endif
134
135
136
137 /* ------------------------------------------------------------------------ */
138 /* Platform setup                                                           */
139 /* ------------------------------------------------------------------------ */
140
141 static void efika_show_cpuinfo(struct seq_file *m)
142 {
143         struct device_node *root;
144         const char *revision;
145         const char *codegendescription;
146         const char *codegenvendor;
147
148         root = of_find_node_by_path("/");
149         if (!root)
150                 return;
151
152         revision = of_get_property(root, "revision", NULL);
153         codegendescription = of_get_property(root, "CODEGEN,description", NULL);
154         codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);
155
156         if (codegendescription)
157                 seq_printf(m, "machine\t\t: %s\n", codegendescription);
158         else
159                 seq_printf(m, "machine\t\t: Efika\n");
160
161         if (revision)
162                 seq_printf(m, "revision\t: %s\n", revision);
163
164         if (codegenvendor)
165                 seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
166
167         of_node_put(root);
168 }
169
170 #ifdef CONFIG_PM
171 static void efika_suspend_prepare(void __iomem *mbar)
172 {
173         u8 pin = 4;     /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
174         u8 level = 1;   /* wakeup on high level */
175         /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
176         mpc52xx_set_wakeup_gpio(pin, level);
177 }
178 #endif
179
180 static void __init efika_setup_arch(void)
181 {
182         rtas_initialize();
183
184         /* Map important registers from the internal memory map */
185         mpc52xx_map_common_devices();
186
187 #ifdef CONFIG_PM
188         mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare;
189         mpc52xx_pm_init();
190 #endif
191
192         if (ppc_md.progress)
193                 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
194 }
195
196 static int __init efika_probe(void)
197 {
198         const char *model = of_get_property(of_root, "model", NULL);
199
200         if (model == NULL)
201                 return 0;
202         if (strcmp(model, "EFIKA5K2"))
203                 return 0;
204
205         DMA_MODE_READ = 0x44;
206         DMA_MODE_WRITE = 0x48;
207
208         pm_power_off = rtas_power_off;
209
210         return 1;
211 }
212
213 define_machine(efika)
214 {
215         .name                   = EFIKA_PLATFORM_NAME,
216         .probe                  = efika_probe,
217         .setup_arch             = efika_setup_arch,
218         .discover_phbs          = efika_pcisetup,
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         .halt                   = rtas_halt,
225         .set_rtc_time           = rtas_set_rtc_time,
226         .get_rtc_time           = rtas_get_rtc_time,
227         .progress               = rtas_progress,
228         .get_boot_time          = rtas_get_boot_time,
229         .calibrate_decr         = generic_calibrate_decr,
230 #ifdef CONFIG_PCI
231         .phys_mem_access_prot   = pci_phys_mem_access_prot,
232 #endif
233 };
234