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[POWERPC] powerpc: PA Semi PWRficient platform support

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Base patch for PA6T and PA6T-1682M. This introduces the
arch/powerpc/platform/pasemi directory, together with basic
implementations for various setup.

Much of this was based on other platform code, i.e. Maple, etc.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Olof Johansson 2006-09-06 14:42:08 -05:00 committed by Paul Mackerras
parent b3ebd1d862
commit 1e76875e51
7 changed files with 436 additions and 0 deletions
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11
arch/powerpc/Kconfig
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@ -413,6 +413,17 @@ config PPC_MAPLE
This option enables support for the Maple 970FX Evaluation Board.
For more informations, refer to <http://www.970eval.com>
config PPC_PASEMI
depends on PPC_MULTIPLATFORM && PPC64
bool "PA Semi SoC-based platforms"
default n
select MPIC
select PPC_UDBG_16550
select GENERIC_TBSYNC
help
This option enables support for PA Semi's PWRficient line
of SoC processors, including PA6T-1682M
config PPC_CELL
bool
default n

1
arch/powerpc/platforms/Makefile
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@ -13,5 +13,6 @@ obj-$(CONFIG_PPC_86xx) += 86xx/
obj-$(CONFIG_PPC_PSERIES) += pseries/
obj-$(CONFIG_PPC_ISERIES) += iseries/
obj-$(CONFIG_PPC_MAPLE) += maple/
obj-$(CONFIG_PPC_PASEMI) += pasemi/
obj-$(CONFIG_PPC_CELL) += cell/
obj-$(CONFIG_EMBEDDED6xx) += embedded6xx/

1
arch/powerpc/platforms/pasemi/Makefile Normal file
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@ -0,0 +1 @@
obj-y += setup.o pci.o time.o

8
arch/powerpc/platforms/pasemi/pasemi.h Normal file
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@ -0,0 +1,8 @@
#ifndef _PASEMI_PASEMI_H
#define _PASEMI_PASEMI_H
extern unsigned long pas_get_boot_time(void);
extern void pas_pci_init(void);
extern void pas_pcibios_fixup(void);
#endif /* _PASEMI_PASEMI_H */

198
arch/powerpc/platforms/pasemi/pci.c Normal file
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@ -0,0 +1,198 @@
/*
* Copyright (C) 2006 PA Semi, Inc
*
* Authors: Kip Walker, PA Semi
* Olof Johansson, PA Semi
*
* Maintained by: Olof Johansson <olof@lixom.net>
*
* Based on arch/powerpc/platforms/maple/pci.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/pci.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/ppc-pci.h>
#define PA_PXP_CFA(bus, devfn, off) (((bus) << 20) | ((devfn) << 12) | (off))
#define CONFIG_OFFSET_VALID(off) ((off) < 4096)
static unsigned long pa_pxp_cfg_addr(struct pci_controller *hose,
u8 bus, u8 devfn, int offset)
{
return ((unsigned long)hose->cfg_data) + PA_PXP_CFA(bus, devfn, offset);
}
static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 *val)
{
struct pci_controller *hose;
unsigned long addr;
hose = pci_bus_to_host(bus);
if (!hose)
return PCIBIOS_DEVICE_NOT_FOUND;
if (!CONFIG_OFFSET_VALID(offset))
return PCIBIOS_BAD_REGISTER_NUMBER;
addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
/*
* Note: the caller has already checked that offset is
* suitably aligned and that len is 1, 2 or 4.
*/
switch (len) {
case 1:
*val = in_8((u8 *)addr);
break;
case 2:
*val = in_le16((u16 *)addr);
break;
default:
*val = in_le32((u32 *)addr);
break;
}
return PCIBIOS_SUCCESSFUL;
}
static int pa_pxp_write_config(struct pci_bus *bus, unsigned int devfn,
int offset, int len, u32 val)
{
struct pci_controller *hose;
unsigned long addr;
hose = pci_bus_to_host(bus);
if (!hose)
return PCIBIOS_DEVICE_NOT_FOUND;
if (!CONFIG_OFFSET_VALID(offset))
return PCIBIOS_BAD_REGISTER_NUMBER;
addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
/*
* Note: the caller has already checked that offset is
* suitably aligned and that len is 1, 2 or 4.
*/
switch (len) {
case 1:
out_8((u8 *)addr, val);
(void) in_8((u8 *)addr);
break;
case 2:
out_le16((u16 *)addr, val);
(void) in_le16((u16 *)addr);
break;
default:
out_le32((u32 *)addr, val);
(void) in_le32((u32 *)addr);
break;
}
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops pa_pxp_ops = {
pa_pxp_read_config,
pa_pxp_write_config,
};
static void __init setup_pa_pxp(struct pci_controller *hose)
{
hose->ops = &pa_pxp_ops;
hose->cfg_data = ioremap(0xe0000000, 0x10000000);
}
static int __init add_bridge(struct device_node *dev)
{
struct pci_controller *hose;
pr_debug("Adding PCI host bridge %s\n", dev->full_name);
hose = pcibios_alloc_controller(dev);
if (!hose)
return -ENOMEM;
hose->first_busno = 0;
hose->last_busno = 0xff;
setup_pa_pxp(hose);
printk(KERN_INFO "Found PA-PXP PCI host bridge.\n");
/* Interpret the "ranges" property */
/* This also maps the I/O region and sets isa_io/mem_base */
pci_process_bridge_OF_ranges(hose, dev, 1);
pci_setup_phb_io(hose, 1);
return 0;
}
void __init pas_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
for_each_pci_dev(dev)
pci_read_irq_line(dev);
}
static void __init pas_fixup_phb_resources(void)
{
struct pci_controller *hose, *tmp;
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
unsigned long offset = (unsigned long)hose->io_base_virt - pci_io_base;
hose->io_resource.start += offset;
hose->io_resource.end += offset;
printk(KERN_INFO "PCI Host %d, io start: %lx; io end: %lx\n",
hose->global_number,
hose->io_resource.start, hose->io_resource.end);
}
}
void __init pas_pci_init(void)
{
struct device_node *np, *root;
root = of_find_node_by_path("/");
if (!root) {
printk(KERN_CRIT "pas_pci_init: can't find root "
"of device tree\n");
return;
}
for (np = NULL; (np = of_get_next_child(root, np)) != NULL;)
if (np->name && !strcmp(np->name, "pxp") && !add_bridge(np))
of_node_get(np);
of_node_put(root);
pas_fixup_phb_resources();
/* Setup the linkage between OF nodes and PHBs */
pci_devs_phb_init();
/* Use the common resource allocation mechanism */
pci_probe_only = 1;
}

188
arch/powerpc/platforms/pasemi/setup.c Normal file
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@ -0,0 +1,188 @@
/*
* Copyright (C) 2006 PA Semi, Inc
*
* Authors: Kip Walker, PA Semi
* Olof Johansson, PA Semi
*
* Maintained by: Olof Johansson <olof@lixom.net>
*
* Based on arch/powerpc/platforms/maple/setup.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/config.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/console.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/iommu.h>
#include <asm/machdep.h>
#include <asm/mpic.h>
#include <asm/smp.h>
#include <asm/time.h>
#include "pasemi.h"
static void pas_restart(char *cmd)
{
printk("restart unimplemented, looping...\n");
for (;;) ;
}
static void pas_power_off(void)
{
printk("power off unimplemented, looping...\n");
for (;;) ;
}
static void pas_halt(void)
{
pas_power_off();
}
#ifdef CONFIG_SMP
struct smp_ops_t pas_smp_ops = {
.probe = smp_mpic_probe,
.message_pass = smp_mpic_message_pass,
.kick_cpu = smp_generic_kick_cpu,
.setup_cpu = smp_mpic_setup_cpu,
.give_timebase = smp_generic_give_timebase,
.take_timebase = smp_generic_take_timebase,
};
#endif /* CONFIG_SMP */
void __init pas_setup_arch(void)
{
#ifdef CONFIG_SMP
/* Setup SMP callback */
smp_ops = &pas_smp_ops;
#endif
/* Lookup PCI hosts */
pas_pci_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
printk(KERN_DEBUG "Using default idle loop\n");
}
static void iommu_dev_setup_null(struct pci_dev *dev) { }
static void iommu_bus_setup_null(struct pci_bus *bus) { }
static void __init pas_init_early(void)
{
/* No iommu code yet */
ppc_md.iommu_dev_setup = iommu_dev_setup_null;
ppc_md.iommu_bus_setup = iommu_bus_setup_null;
pci_direct_iommu_init();
}
/* No legacy IO on our parts */
static int pas_check_legacy_ioport(unsigned int baseport)
{
return -ENODEV;
}
static __init void pas_init_IRQ(void)
{
struct device_node *np;
struct device_node *root, *mpic_node;
unsigned long openpic_addr;
const unsigned int *opprop;
int naddr, opplen;
struct mpic *mpic;
mpic_node = NULL;
for_each_node_by_type(np, "interrupt-controller")
if (device_is_compatible(np, "open-pic")) {
mpic_node = np;
break;
}
if (!mpic_node)
for_each_node_by_type(np, "open-pic") {
mpic_node = np;
break;
}
if (!mpic_node) {
printk(KERN_ERR
"Failed to locate the MPIC interrupt controller\n");
return;
}
/* Find address list in /platform-open-pic */
root = of_find_node_by_path("/");
naddr = prom_n_addr_cells(root);
opprop = get_property(root, "platform-open-pic", &opplen);
if (!opprop) {
printk(KERN_ERR "No platform-open-pic property.\n");
of_node_put(root);
return;
}
openpic_addr = of_read_number(opprop, naddr);
printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
of_node_put(root);
mpic = mpic_alloc(mpic_node, openpic_addr, MPIC_PRIMARY, 0, 0,
" PAS-OPIC ");
BUG_ON(!mpic);
mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
mpic_init(mpic);
of_node_put(mpic_node);
of_node_put(root);
}
static void __init pas_progress(char *s, unsigned short hex)
{
printk("[%04x] : %s\n", hex, s ? s : "");
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init pas_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
return 0;
hpte_init_native();
return 1;
}
define_machine(pas) {
.name = "PA Semi PA6T-1682M",
.probe = pas_probe,
.setup_arch = pas_setup_arch,
.init_early = pas_init_early,
.init_IRQ = pas_init_IRQ,
.get_irq = mpic_get_irq,
.pcibios_fixup = pas_pcibios_fixup,
.restart = pas_restart,
.power_off = pas_power_off,
.halt = pas_halt,
.get_boot_time = pas_get_boot_time,
.calibrate_decr = generic_calibrate_decr,
.check_legacy_ioport = pas_check_legacy_ioport,
.progress = pas_progress,
};

29
arch/powerpc/platforms/pasemi/time.c Normal file
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@ -0,0 +1,29 @@
/*
* Copyright (C) 2006 PA Semi, Inc
*
* Maintained by: Olof Johansson <olof@lixom.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/config.h>
#include <linux/time.h>
#include <asm/time.h>
unsigned long __init pas_get_boot_time(void)
{
/* Let's just return a fake date right now */
return mktime(2006, 1, 1, 12, 0, 0);
}