e2eb63927b
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
269 lines
6.6 KiB
C
269 lines
6.6 KiB
C
/*
|
|
* Efika 5K2 platform code
|
|
* Some code really inspired from the lite5200b platform.
|
|
*
|
|
* Copyright (C) 2006 bplan GmbH
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public License
|
|
* version 2. This program is licensed "as is" without any warranty of any
|
|
* kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/init.h>
|
|
#include <linux/utsrelease.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/string.h>
|
|
#include <linux/root_dev.h>
|
|
#include <linux/initrd.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/console.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/pgtable.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/time.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/of_device.h>
|
|
#include <asm/of_platform.h>
|
|
#include <asm/mpc52xx.h>
|
|
|
|
|
|
#define EFIKA_PLATFORM_NAME "Efika"
|
|
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
/* PCI accesses thru RTAS */
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
#ifdef CONFIG_PCI
|
|
|
|
/*
|
|
* Access functions for PCI config space using RTAS calls.
|
|
*/
|
|
static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
|
|
int len, u32 * val)
|
|
{
|
|
struct pci_controller *hose = bus->sysdata;
|
|
unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
|
|
| (((bus->number - hose->first_busno) & 0xff) << 16)
|
|
| (hose->index << 24);
|
|
int ret = -1;
|
|
int rval;
|
|
|
|
rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
|
|
*val = ret;
|
|
return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int rtas_write_config(struct pci_bus *bus, unsigned int devfn,
|
|
int offset, int len, u32 val)
|
|
{
|
|
struct pci_controller *hose = bus->sysdata;
|
|
unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
|
|
| (((bus->number - hose->first_busno) & 0xff) << 16)
|
|
| (hose->index << 24);
|
|
int rval;
|
|
|
|
rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
|
|
addr, len, val);
|
|
return rval ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static struct pci_ops rtas_pci_ops = {
|
|
rtas_read_config,
|
|
rtas_write_config
|
|
};
|
|
|
|
|
|
void __init efika_pcisetup(void)
|
|
{
|
|
const int *bus_range;
|
|
int len;
|
|
struct pci_controller *hose;
|
|
struct device_node *root;
|
|
struct device_node *pcictrl;
|
|
|
|
root = of_find_node_by_path("/");
|
|
if (root == NULL) {
|
|
printk(KERN_WARNING EFIKA_PLATFORM_NAME
|
|
": Unable to find the root node\n");
|
|
return;
|
|
}
|
|
|
|
for (pcictrl = NULL;;) {
|
|
pcictrl = of_get_next_child(root, pcictrl);
|
|
if ((pcictrl == NULL) || (strcmp(pcictrl->name, "pci") == 0))
|
|
break;
|
|
}
|
|
|
|
of_node_put(root);
|
|
|
|
if (pcictrl == NULL) {
|
|
printk(KERN_WARNING EFIKA_PLATFORM_NAME
|
|
": Unable to find the PCI bridge node\n");
|
|
return;
|
|
}
|
|
|
|
bus_range = of_get_property(pcictrl, "bus-range", &len);
|
|
if (bus_range == NULL || len < 2 * sizeof(int)) {
|
|
printk(KERN_WARNING EFIKA_PLATFORM_NAME
|
|
": Can't get bus-range for %s\n", pcictrl->full_name);
|
|
return;
|
|
}
|
|
|
|
if (bus_range[1] == bus_range[0])
|
|
printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI bus %d",
|
|
bus_range[0]);
|
|
else
|
|
printk(KERN_INFO EFIKA_PLATFORM_NAME ": PCI buses %d..%d",
|
|
bus_range[0], bus_range[1]);
|
|
printk(" controlled by %s\n", pcictrl->full_name);
|
|
printk("\n");
|
|
|
|
hose = pcibios_alloc_controller();
|
|
if (!hose) {
|
|
printk(KERN_WARNING EFIKA_PLATFORM_NAME
|
|
": Can't allocate PCI controller structure for %s\n",
|
|
pcictrl->full_name);
|
|
return;
|
|
}
|
|
|
|
hose->arch_data = of_node_get(pcictrl);
|
|
hose->first_busno = bus_range[0];
|
|
hose->last_busno = bus_range[1];
|
|
hose->ops = &rtas_pci_ops;
|
|
|
|
pci_process_bridge_OF_ranges(hose, pcictrl, 0);
|
|
}
|
|
|
|
#else
|
|
void __init efika_pcisetup(void)
|
|
{}
|
|
#endif
|
|
|
|
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
/* Platform setup */
|
|
/* ------------------------------------------------------------------------ */
|
|
|
|
static void efika_show_cpuinfo(struct seq_file *m)
|
|
{
|
|
struct device_node *root;
|
|
const char *revision;
|
|
const char *codegendescription;
|
|
const char *codegenvendor;
|
|
|
|
root = of_find_node_by_path("/");
|
|
if (!root)
|
|
return;
|
|
|
|
revision = of_get_property(root, "revision", NULL);
|
|
codegendescription = of_get_property(root, "CODEGEN,description", NULL);
|
|
codegenvendor = of_get_property(root, "CODEGEN,vendor", NULL);
|
|
|
|
if (codegendescription)
|
|
seq_printf(m, "machine\t\t: %s\n", codegendescription);
|
|
else
|
|
seq_printf(m, "machine\t\t: Efika\n");
|
|
|
|
if (revision)
|
|
seq_printf(m, "revision\t: %s\n", revision);
|
|
|
|
if (codegenvendor)
|
|
seq_printf(m, "vendor\t\t: %s\n", codegenvendor);
|
|
|
|
of_node_put(root);
|
|
}
|
|
|
|
static void __init efika_setup_arch(void)
|
|
{
|
|
rtas_initialize();
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
initrd_below_start_ok = 1;
|
|
|
|
if (initrd_start)
|
|
ROOT_DEV = Root_RAM0;
|
|
else
|
|
#endif
|
|
ROOT_DEV = Root_SDA2; /* sda2 (sda1 is for the kernel) */
|
|
|
|
efika_pcisetup();
|
|
|
|
if (ppc_md.progress)
|
|
ppc_md.progress("Linux/PPC " UTS_RELEASE " running on Efika ;-)\n", 0x0);
|
|
}
|
|
|
|
static int __init efika_probe(void)
|
|
{
|
|
char *model = of_get_flat_dt_prop(of_get_flat_dt_root(),
|
|
"model", NULL);
|
|
|
|
if (model == NULL)
|
|
return 0;
|
|
if (strcmp(model, "EFIKA5K2"))
|
|
return 0;
|
|
|
|
ISA_DMA_THRESHOLD = ~0L;
|
|
DMA_MODE_READ = 0x44;
|
|
DMA_MODE_WRITE = 0x48;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void __init efika_init_early(void)
|
|
{
|
|
#ifdef CONFIG_SERIAL_MPC52xx
|
|
struct device_node *stdout_node;
|
|
const char *device_type;
|
|
|
|
if (strstr(cmd_line, "console="))
|
|
return;
|
|
/* find the boot console from /chosen/stdout */
|
|
if (!of_chosen)
|
|
return;
|
|
device_type = get_property(of_chosen, "linux,stdout-path", NULL);
|
|
if (!device_type)
|
|
return;
|
|
stdout_node = of_find_node_by_path(device_type);
|
|
if (stdout_node) {
|
|
device_type = get_property(stdout_node, "device_type", NULL);
|
|
if (device_type && strcmp(device_type, "serial") == 0)
|
|
add_preferred_console("ttyPSC", 0, NULL);
|
|
of_node_put(stdout_node);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
define_machine(efika)
|
|
{
|
|
.name = EFIKA_PLATFORM_NAME,
|
|
.probe = efika_probe,
|
|
.setup_arch = efika_setup_arch,
|
|
.init = mpc52xx_declare_of_platform_devices,
|
|
.init_early = efika_init_early,
|
|
.show_cpuinfo = efika_show_cpuinfo,
|
|
.init_IRQ = mpc52xx_init_irq,
|
|
.get_irq = mpc52xx_get_irq,
|
|
.restart = rtas_restart,
|
|
.power_off = rtas_power_off,
|
|
.halt = rtas_halt,
|
|
.set_rtc_time = rtas_set_rtc_time,
|
|
.get_rtc_time = rtas_get_rtc_time,
|
|
.progress = rtas_progress,
|
|
.get_boot_time = rtas_get_boot_time,
|
|
.calibrate_decr = generic_calibrate_decr,
|
|
.phys_mem_access_prot = pci_phys_mem_access_prot,
|
|
};
|
|
|