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 <linux/seq_file.h>
17#include <asm/dma.h>
18#include <asm/time.h>
19#include <asm/machdep.h>
20#include <asm/rtas.h>
21#include <asm/mpc52xx.h>
22
23#define EFIKA_PLATFORM_NAME "Efika"
24
25
26/* ------------------------------------------------------------------------ */
27/* PCI accesses thru RTAS */
28/* ------------------------------------------------------------------------ */
29
30#ifdef CONFIG_PCI
31
32/*
33 * Access functions for PCI config space using RTAS calls.
34 */
35static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
36 int len, u32 * val)
37{
38 struct pci_controller *hose = pci_bus_to_host(bus);
39 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
40 | (((bus->number - hose->first_busno) & 0xff) << 16)
41 | (hose->global_number << 24);
42 int ret = -1;
43 int rval;
44
45 rval = rtas_call(rtas_function_token(RTAS_FN_READ_PCI_CONFIG), 2, 2, &ret, addr, len);
46 *val = ret;
47 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
48}
49
50static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
51 int offset, int len, u32 val)
52{
53 struct pci_controller *hose = pci_bus_to_host(bus);
54 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
55 | (((bus->number - hose->first_busno) & 0xff) << 16)
56 | (hose->global_number << 24);
57 int rval;
58
59 rval = rtas_call(rtas_function_token(RTAS_FN_WRITE_PCI_CONFIG), 3, 1, NULL,
60 addr, len, val);
61 return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
62}
63
64static struct pci_ops rtas_pci_ops = {
65 .read = rtas_read_config,
66 .write = rtas_write_config,
67};
68
69
70static void __init efika_pcisetup(void)
71{
72 const int *bus_range;
73 int len;
74 struct pci_controller *hose;
75 struct device_node *root;
76 struct device_node *pcictrl;
77
78 root = of_find_node_by_path(path: "/");
79 if (root == NULL) {
80 printk(KERN_WARNING EFIKA_PLATFORM_NAME
81 ": Unable to find the root node\n");
82 return;
83 }
84
85 for_each_child_of_node(root, pcictrl)
86 if (of_node_name_eq(np: pcictrl, name: "pci"))
87 break;
88
89 of_node_put(node: root);
90
91 if (pcictrl == NULL) {
92 printk(KERN_WARNING EFIKA_PLATFORM_NAME
93 ": Unable to find the PCI bridge node\n");
94 return;
95 }
96
97 bus_range = of_get_property(node: pcictrl, name: "bus-range", lenp: &len);
98 if (bus_range == NULL || len < 2 * sizeof(int)) {
99 printk(KERN_WARNING EFIKA_PLATFORM_NAME
100 ": Can't get bus-range for %pOF\n", pcictrl);
101 goto out_put;
102 }
103
104 if (bus_range[1] == bus_range[0])
105 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
106 bus_range[0]);
107 else
108 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
109 bus_range[0], bus_range[1]);
110 printk(" controlled by %pOF\n", pcictrl);
111 printk("\n");
112
113 hose = pcibios_alloc_controller(pcictrl);
114 if (!hose) {
115 printk(KERN_WARNING EFIKA_PLATFORM_NAME
116 ": Can't allocate PCI controller structure for %pOF\n",
117 pcictrl);
118 goto out_put;
119 }
120
121 hose->first_busno = bus_range[0];
122 hose->last_busno = bus_range[1];
123 hose->ops = &rtas_pci_ops;
124
125 pci_process_bridge_OF_ranges(hose, pcictrl, 0);
126 return;
127out_put:
128 of_node_put(node: pcictrl);
129}
130
131#else
132static void __init efika_pcisetup(void)
133{}
134#endif
135
136
137
138/* ------------------------------------------------------------------------ */
139/* Platform setup */
140/* ------------------------------------------------------------------------ */
141
142static void efika_show_cpuinfo(struct seq_file *m)
143{
144 struct device_node *root;
145 const char *revision;
146 const char *codegendescription;
147 const char *codegenvendor;
148
149 root = of_find_node_by_path(path: "/");
150 if (!root)
151 return;
152
153 revision = of_get_property(node: root, name: "revision", NULL);
154 codegendescription = of_get_property(node: root, name: "CODEGEN,description", NULL);
155 codegenvendor = of_get_property(node: root, name: "CODEGEN,vendor", NULL);
156
157 if (codegendescription)
158 seq_printf(m, fmt: "machine\t\t: %s\n", codegendescription);
159 else
160 seq_printf(m, fmt: "machine\t\t: Efika\n");
161
162 if (revision)
163 seq_printf(m, fmt: "revision\t: %s\n", revision);
164
165 if (codegenvendor)
166 seq_printf(m, fmt: "vendor\t\t: %s\n", codegenvendor);
167
168 of_node_put(node: root);
169}
170
171#ifdef CONFIG_PM
172static void efika_suspend_prepare(void __iomem *mbar)
173{
174 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
175 u8 level = 1; /* wakeup on high level */
176 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
177 mpc52xx_set_wakeup_gpio(pin, level);
178}
179#endif
180
181static void __init efika_setup_arch(void)
182{
183 rtas_initialize();
184
185 /* Map important registers from the internal memory map */
186 mpc52xx_map_common_devices();
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
197static int __init efika_probe(void)
198{
199 struct device_node *root = of_find_node_by_path(path: "/");
200 const char *model = of_get_property(node: root, name: "model", NULL);
201
202 of_node_put(node: root);
203 if (model == NULL)
204 return 0;
205 if (strcmp(model, "EFIKA5K2"))
206 return 0;
207
208 DMA_MODE_READ = 0x44;
209 DMA_MODE_WRITE = 0x48;
210
211 pm_power_off = rtas_power_off;
212
213 return 1;
214}
215
216define_machine(efika)
217{
218 .name = EFIKA_PLATFORM_NAME,
219 .probe = efika_probe,
220 .setup_arch = efika_setup_arch,
221 .discover_phbs = efika_pcisetup,
222 .init = mpc52xx_declare_of_platform_devices,
223 .show_cpuinfo = efika_show_cpuinfo,
224 .init_IRQ = mpc52xx_init_irq,
225 .get_irq = mpc52xx_get_irq,
226 .restart = rtas_restart,
227 .halt = rtas_halt,
228 .set_rtc_time = rtas_set_rtc_time,
229 .get_rtc_time = rtas_get_rtc_time,
230 .progress = rtas_progress,
231 .get_boot_time = rtas_get_boot_time,
232#ifdef CONFIG_PCI
233 .phys_mem_access_prot = pci_phys_mem_access_prot,
234#endif
235};
236
237

source code of linux/arch/powerpc/platforms/52xx/efika.c