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Sylvain Munaut9724b862007-02-12 23:13:24 +01001/*
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
Sylvain Munaut9724b862007-02-12 23:13:24 +010012#include <linux/init.h>
Sam Ravnborg273b2812009-10-18 00:52:28 +020013#include <generated/utsrelease.h>
Sylvain Munaut9724b862007-02-12 23:13:24 +010014#include <linux/pci.h>
Grant Likely9fe2e792007-10-10 09:52:00 -060015#include <linux/of.h>
Laura Abbott308c09f2014-08-08 14:23:25 -070016#include <asm/dma.h>
Sylvain Munaut9724b862007-02-12 23:13:24 +010017#include <asm/prom.h>
18#include <asm/time.h>
19#include <asm/machdep.h>
20#include <asm/rtas.h>
Sylvain Munaut9724b862007-02-12 23:13:24 +010021#include <asm/mpc52xx.h>
22
Sylvain Munaut9724b862007-02-12 23:13:24 +010023#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{
Kumar Gala5b21fb82009-04-30 03:10:09 +000038 struct pci_controller *hose = pci_bus_to_host(bus);
Sylvain Munaut9724b862007-02-12 23:13:24 +010039 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
40 | (((bus->number - hose->first_busno) & 0xff) << 16)
Kumar Gala5516b542007-06-27 01:17:57 -050041 | (hose->global_number << 24);
Sylvain Munaut9724b862007-02-12 23:13:24 +010042 int ret = -1;
43 int rval;
44
45 rval = rtas_call(rtas_token("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{
Kumar Gala5b21fb82009-04-30 03:10:09 +000053 struct pci_controller *hose = pci_bus_to_host(bus);
Sylvain Munaut9724b862007-02-12 23:13:24 +010054 unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
55 | (((bus->number - hose->first_busno) & 0xff) << 16)
Kumar Gala5516b542007-06-27 01:17:57 -050056 | (hose->global_number << 24);
Sylvain Munaut9724b862007-02-12 23:13:24 +010057 int rval;
58
59 rval = rtas_call(rtas_token("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 = {
Nathan Lynch21d8f6c2007-08-10 05:18:43 +100065 .read = rtas_read_config,
66 .write = rtas_write_config,
Sylvain Munaut9724b862007-02-12 23:13:24 +010067};
68
69
Domen Puncerd3e0e022007-07-09 09:52:03 +020070static void __init efika_pcisetup(void)
Sylvain Munaut9724b862007-02-12 23:13:24 +010071{
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("/");
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 (pcictrl = NULL;;) {
86 pcictrl = of_get_next_child(root, pcictrl);
87 if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0))
88 break;
89 }
90
91 of_node_put(root);
92
93 if (pcictrl == NULL) {
94 printk(KERN_WARNING EFIKA_PLATFORM_NAME
95 ": Unable to find the PCI bridge node\n");
96 return;
97 }
98
Stephen Rothwelle2eb6392007-04-03 22:26:41 +100099 bus_range = of_get_property(pcictrl, "bus-range", &len);
Sylvain Munaut9724b862007-02-12 23:13:24 +0100100 if (bus_range == NULL || len < 2 * sizeof(int)) {
101 printk(KERN_WARNING EFIKA_PLATFORM_NAME
102 ": Can't get bus-range for %s\n", pcictrl->full_name);
Julia Lawall915b9612010-09-04 09:13:17 +0200103 goto out_put;
Sylvain Munaut9724b862007-02-12 23:13:24 +0100104 }
105
106 if (bus_range[1] == bus_range[0])
107 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
108 bus_range[0]);
109 else
110 printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
111 bus_range[0], bus_range[1]);
112 printk(" controlled by %s\n", pcictrl->full_name);
113 printk("\n");
114
Julia Lawall915b9612010-09-04 09:13:17 +0200115 hose = pcibios_alloc_controller(pcictrl);
Sylvain Munaut9724b862007-02-12 23:13:24 +0100116 if (!hose) {
117 printk(KERN_WARNING EFIKA_PLATFORM_NAME
118 ": Can't allocate PCI controller structure for %s\n",
119 pcictrl->full_name);
Julia Lawall915b9612010-09-04 09:13:17 +0200120 goto out_put;
Sylvain Munaut9724b862007-02-12 23:13:24 +0100121 }
122
Sylvain Munaut9724b862007-02-12 23:13:24 +0100123 hose->first_busno = bus_range[0];
124 hose->last_busno = bus_range[1];
125 hose->ops = &rtas_pci_ops;
126
127 pci_process_bridge_OF_ranges(hose, pcictrl, 0);
Julia Lawall915b9612010-09-04 09:13:17 +0200128 return;
129out_put:
130 of_node_put(pcictrl);
Sylvain Munaut9724b862007-02-12 23:13:24 +0100131}
132
133#else
Domen Puncerd3e0e022007-07-09 09:52:03 +0200134static void __init efika_pcisetup(void)
Sylvain Munaut9724b862007-02-12 23:13:24 +0100135{}
136#endif
137
138
139
140/* ------------------------------------------------------------------------ */
141/* Platform setup */
142/* ------------------------------------------------------------------------ */
143
144static void efika_show_cpuinfo(struct seq_file *m)
145{
146 struct device_node *root;
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000147 const char *revision;
148 const char *codegendescription;
149 const char *codegenvendor;
Sylvain Munaut9724b862007-02-12 23:13:24 +0100150
151 root = of_find_node_by_path("/");
152 if (!root)
153 return;
154
Stephen Rothwelle2eb6392007-04-03 22:26:41 +1000155 revision = of_get_property(root, "revision", NULL);
156 codegendescription = of_get_property(root, "CODEGEN,description", NULL);
157 codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);
Sylvain Munaut9724b862007-02-12 23:13:24 +0100158
159 if (codegendescription)
160 seq_printf(m, "machine\t\t: %s\n", codegendescription);
161 else
162 seq_printf(m, "machine\t\t: Efika\n");
163
164 if (revision)
165 seq_printf(m, "revision\t: %s\n", revision);
166
167 if (codegenvendor)
168 seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
169
170 of_node_put(root);
171}
172
Domen Puncer2e1ee1f2007-05-07 01:38:52 +1000173#ifdef CONFIG_PM
174static void efika_suspend_prepare(void __iomem *mbar)
175{
176 u8 pin = 4; /* GPIO_WKUP_4 (GPIO_PSC6_0 - IRDA_RX) */
177 u8 level = 1; /* wakeup on high level */
178 /* IOW. to wake it up, short pins 1 and 3 on IRDA connector */
179 mpc52xx_set_wakeup_gpio(pin, level);
180}
181#endif
182
Sylvain Munaut9724b862007-02-12 23:13:24 +0100183static void __init efika_setup_arch(void)
184{
185 rtas_initialize();
186
Grant Likelyc8004a22008-01-24 22:25:31 -0700187 /* Map important registers from the internal memory map */
188 mpc52xx_map_common_devices();
189
Sylvain Munaut9724b862007-02-12 23:13:24 +0100190 efika_pcisetup();
191
Domen Puncer2e1ee1f2007-05-07 01:38:52 +1000192#ifdef CONFIG_PM
193 mpc52xx_suspend.board_suspend_prepare = efika_suspend_prepare;
194 mpc52xx_pm_init();
195#endif
196
Sylvain Munaut9724b862007-02-12 23:13:24 +0100197 if (ppc_md.progress)
198 ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
199}
200
201static int __init efika_probe(void)
202{
Rob Herring9d0c4df2014-04-01 23:49:03 -0500203 const char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
204 "model", NULL);
Sylvain Munaut9724b862007-02-12 23:13:24 +0100205
206 if (model == NULL)
207 return 0;
208 if (strcmp(model, "EFIKA5K2"))
209 return 0;
210
211 ISA_DMA_THRESHOLD = ~0L;
212 DMA_MODE_READ = 0x44;
213 DMA_MODE_WRITE = 0x48;
214
Alexander Graf9178ba22014-10-13 16:01:09 +0200215 pm_power_off = rtas_power_off;
216
Sylvain Munaut9724b862007-02-12 23:13:24 +0100217 return 1;
218}
219
220define_machine(efika)
221{
222 .name = EFIKA_PLATFORM_NAME,
223 .probe = efika_probe,
224 .setup_arch = efika_setup_arch,
225 .init = mpc52xx_declare_of_platform_devices,
Sylvain Munaut9724b862007-02-12 23:13:24 +0100226 .show_cpuinfo = efika_show_cpuinfo,
227 .init_IRQ = mpc52xx_init_irq,
228 .get_irq = mpc52xx_get_irq,
229 .restart = rtas_restart,
Sylvain Munaut9724b862007-02-12 23:13:24 +0100230 .halt = rtas_halt,
231 .set_rtc_time = rtas_set_rtc_time,
232 .get_rtc_time = rtas_get_rtc_time,
233 .progress = rtas_progress,
234 .get_boot_time = rtas_get_boot_time,
235 .calibrate_decr = generic_calibrate_decr,
Arnd Bergmannd6658402007-06-18 01:06:57 +0200236#ifdef CONFIG_PCI
Sylvain Munaut9724b862007-02-12 23:13:24 +0100237 .phys_mem_access_prot = pci_phys_mem_access_prot,
Arnd Bergmannd6658402007-06-18 01:06:57 +0200238#endif
Sylvain Munaut9724b862007-02-12 23:13:24 +0100239};
240