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 */
34static 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_function_token(RTAS_FN_READ_PCI_CONFIG), 2, 2, &ret, addr, len);
45	*val = ret;
46	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
47}
48
49static 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_function_token(RTAS_FN_WRITE_PCI_CONFIG), 3, 1, NULL,
59			 addr, len, val);
60	return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
61}
62
63static struct pci_ops rtas_pci_ops = {
64	.read = rtas_read_config,
65	.write = rtas_write_config,
66};
67
68
69static 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;
126out_put:
127	of_node_put(pcictrl);
128}
129
130#else
131static void __init efika_pcisetup(void)
132{}
133#endif
134
135
136
137/* ------------------------------------------------------------------------ */
138/* Platform setup                                                           */
139/* ------------------------------------------------------------------------ */
140
141static 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
171static 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
180static 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
196static 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
213define_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#ifdef CONFIG_PCI
230	.phys_mem_access_prot	= pci_phys_mem_access_prot,
231#endif
232};
233
234