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[POWERPC] Add support for 750CL Holly board
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Add PowerPC 750 Holly/Hickory platform support

Signed-off-by: Stephen Winiecki <stevewin@us.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Josh Boyer authored and Paul Mackerras committed May 8, 2007
1 parent 05ad6a9 commit cb9e4d1
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Showing 4 changed files with 330 additions and 4 deletions.
2 changes: 1 addition & 1 deletion arch/powerpc/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -664,7 +664,7 @@ config MCA
config PCI
bool "PCI support" if 40x || CPM2 || PPC_83xx || PPC_85xx || PPC_86xx \
|| PPC_MPC52xx || (EMBEDDED && (PPC_PSERIES || PPC_ISERIES)) \
|| MPC7448HPC2 || PPC_PS3
|| MPC7448HPC2 || PPC_PS3 || PPC_HOLLY
default y if !40x && !CPM2 && !8xx && !APUS && !PPC_83xx \
&& !PPC_85xx && !PPC_86xx
default PCI_PERMEDIA if !4xx && !CPM2 && !8xx && APUS
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14 changes: 11 additions & 3 deletions arch/powerpc/platforms/embedded6xx/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -20,16 +20,24 @@ config MPC7448HPC2
select TSI108_BRIDGE
select DEFAULT_UIMAGE
select PPC_UDBG_16550
select MPIC
select MPIC_WEIRD
help
Select MPC7448HPC2 if configuring for Freescale MPC7448HPC2 (Taiga)
platform

config PPC_HOLLY
bool "PPC750GX/CL with TSI10x bridge (Hickory/Holly)"
select TSI108_BRIDGE
select PPC_UDBG_16550
help
Select PPC_HOLLY if configuring for an IBM 750GX/CL Eval
Board with TSI108/9 bridge (Hickory/Holly)
endchoice

config TSI108_BRIDGE
bool
depends on MPC7448HPC2
depends on MPC7448HPC2 || PPC_HOLLY
select MPIC
select MPIC_WEIRD
default y

config MPC10X_BRIDGE
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1 change: 1 addition & 0 deletions arch/powerpc/platforms/embedded6xx/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -3,3 +3,4 @@
#
obj-$(CONFIG_MPC7448HPC2) += mpc7448_hpc2.o
obj-$(CONFIG_LINKSTATION) += linkstation.o ls_uart.o
obj-$(CONFIG_PPC_HOLLY) += holly.o
317 changes: 317 additions & 0 deletions arch/powerpc/platforms/embedded6xx/holly.c
Original file line number Diff line number Diff line change
@@ -0,0 +1,317 @@
/*
* Board setup routines for the IBM 750GX/CL platform w/ TSI10x bridge
*
* Copyright 2007 IBM Corporation
*
* Stephen Winiecki <stevewin@us.ibm.com>
* Josh Boyer <jwboyer@linux.vnet.ibm.com>
*
* Based on code from mpc7448_hpc2.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.
*/

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>

#include <asm/system.h>
#include <asm/time.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/udbg.h>
#include <asm/tsi108.h>
#include <asm/pci-bridge.h>
#include <asm/reg.h>
#include <mm/mmu_decl.h>
#include <asm/tsi108_irq.h>
#include <asm/tsi108_pci.h>
#include <asm/mpic.h>
#include <asm/of_platform.h>

#undef DEBUG

#define HOLLY_PCI_CFG_PHYS 0x7c000000

int holly_exclude_device(u_char bus, u_char devfn)
{
if (bus == 0 && PCI_SLOT(devfn) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
else
return PCIBIOS_SUCCESSFUL;
}

static void holly_remap_bridge(void)
{
u32 lut_val, lut_addr;
int i;

printk(KERN_INFO "Remapping PCI bridge\n");

/* Re-init the PCI bridge and LUT registers to have mappings that don't
* rely on PIBS
*/
lut_addr = 0x900;
for (i = 0; i < 31; i++) {
tsi108_write_reg(TSI108_PB_OFFSET + lut_addr, 0x00000201);
lut_addr += 4;
tsi108_write_reg(TSI108_PB_OFFSET + lut_addr, 0x0);
lut_addr += 4;
}

/* Reserve the last LUT entry for PCI I/O space */
tsi108_write_reg(TSI108_PB_OFFSET + lut_addr, 0x00000241);
lut_addr += 4;
tsi108_write_reg(TSI108_PB_OFFSET + lut_addr, 0x0);

/* Map PCI I/O space */
tsi108_write_reg(TSI108_PCI_PFAB_IO_UPPER, 0x0);
tsi108_write_reg(TSI108_PCI_PFAB_IO, 0x1);

/* Map PCI CFG space */
tsi108_write_reg(TSI108_PCI_PFAB_BAR0_UPPER, 0x0);
tsi108_write_reg(TSI108_PCI_PFAB_BAR0, 0x7c000000 | 0x01);

/* We don't need MEM32 and PRM remapping so disable them */
tsi108_write_reg(TSI108_PCI_PFAB_MEM32, 0x0);
tsi108_write_reg(TSI108_PCI_PFAB_PFM3, 0x0);
tsi108_write_reg(TSI108_PCI_PFAB_PFM4, 0x0);

/* Set P2O_BAR0 */
tsi108_write_reg(TSI108_PCI_P2O_BAR0_UPPER, 0x0);
tsi108_write_reg(TSI108_PCI_P2O_BAR0, 0xc0000000);

/* Init the PCI LUTs to do no remapping */
lut_addr = 0x500;
lut_val = 0x00000002;

for (i = 0; i < 32; i++) {
tsi108_write_reg(TSI108_PCI_OFFSET + lut_addr, lut_val);
lut_addr += 4;
tsi108_write_reg(TSI108_PCI_OFFSET + lut_addr, 0x40000000);
lut_addr += 4;
lut_val += 0x02000000;
}
tsi108_write_reg(TSI108_PCI_P2O_PAGE_SIZES, 0x00007900);

/* Set 64-bit PCI bus address for system memory */
tsi108_write_reg(TSI108_PCI_P2O_BAR2_UPPER, 0x0);
tsi108_write_reg(TSI108_PCI_P2O_BAR2, 0x0);
}

static void __init holly_setup_arch(void)
{
struct device_node *cpu;
struct device_node *np;

if (ppc_md.progress)
ppc_md.progress("holly_setup_arch():set_bridge", 0);

cpu = of_find_node_by_type(NULL, "cpu");
if (cpu) {
const unsigned int *fp;

fp = of_get_property(cpu, "clock-frequency", NULL);
if (fp)
loops_per_jiffy = *fp / HZ;
else
loops_per_jiffy = 50000000 / HZ;
of_node_put(cpu);
}
tsi108_csr_vir_base = get_vir_csrbase();

/* setup PCI host bridge */
holly_remap_bridge();

np = of_find_node_by_type(NULL, "pci");
if (np)
tsi108_setup_pci(np, HOLLY_PCI_CFG_PHYS, 1);

ppc_md.pci_exclude_device = holly_exclude_device;
if (ppc_md.progress)
ppc_md.progress("tsi108: resources set", 0x100);

printk(KERN_INFO "PPC750GX/CL Platform\n");
}

/*
* Interrupt setup and service. Interrrupts on the holly come
* from the four external INT pins, PCI interrupts are routed via
* PCI interrupt control registers, it generates internal IRQ23
*
* Interrupt routing on the Holly Board:
* TSI108:PB_INT[0] -> CPU0:INT#
* TSI108:PB_INT[1] -> CPU0:MCP#
* TSI108:PB_INT[2] -> N/C
* TSI108:PB_INT[3] -> N/C
*/
static void __init holly_init_IRQ(void)
{
struct mpic *mpic;
phys_addr_t mpic_paddr = 0;
struct device_node *tsi_pic;
#ifdef CONFIG_PCI
unsigned int cascade_pci_irq;
struct device_node *tsi_pci;
struct device_node *cascade_node = NULL;
#endif

tsi_pic = of_find_node_by_type(NULL, "open-pic");
if (tsi_pic) {
unsigned int size;
const void *prop = of_get_property(tsi_pic, "reg", &size);
mpic_paddr = of_translate_address(tsi_pic, prop);
}

if (mpic_paddr == 0) {
printk(KERN_ERR "%s: No tsi108 PIC found !\n", __func__);
return;
}

pr_debug("%s: tsi108 pic phys_addr = 0x%x\n", __func__, (u32) mpic_paddr);

mpic = mpic_alloc(tsi_pic, mpic_paddr,
MPIC_PRIMARY | MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
24,
NR_IRQS-4, /* num_sources used */
"Tsi108_PIC");

BUG_ON(mpic == NULL);

mpic_assign_isu(mpic, 0, mpic_paddr + 0x100);

mpic_init(mpic);

#ifdef CONFIG_PCI
tsi_pci = of_find_node_by_type(NULL, "pci");
if (tsi_pci == NULL) {
printk(KERN_ERR "%s: No tsi108 pci node found !\n", __func__);
return;
}

cascade_node = of_find_node_by_type(NULL, "pic-router");
if (cascade_node == NULL) {
printk(KERN_ERR "%s: No tsi108 pci cascade node found !\n", __func__);
return;
}

cascade_pci_irq = irq_of_parse_and_map(tsi_pci, 0);
pr_debug("%s: tsi108 cascade_pci_irq = 0x%x\n", __func__, (u32) cascade_pci_irq);
tsi108_pci_int_init(cascade_node);
set_irq_data(cascade_pci_irq, mpic);
set_irq_chained_handler(cascade_pci_irq, tsi108_irq_cascade);
#endif
/* Configure MPIC outputs to CPU0 */
tsi108_write_reg(TSI108_MPIC_OFFSET + 0x30c, 0);
of_node_put(tsi_pic);
}

void holly_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: IBM\n");
seq_printf(m, "machine\t\t: PPC750 GX/CL\n");
}

void holly_restart(char *cmd)
{
__be32 __iomem *ocn_bar1 = NULL;
unsigned long bar;
struct device_node *bridge = NULL;
const void *prop;
int size;
phys_addr_t addr = 0xc0000000;

local_irq_disable();

bridge = of_find_node_by_type(NULL, "tsi-bridge");
if (bridge) {
prop = of_get_property(bridge, "reg", &size);
addr = of_translate_address(bridge, prop);
}
addr += (TSI108_PB_OFFSET + 0x414);

ocn_bar1 = ioremap(addr, 0x4);

/* Turn on the BOOT bit so the addresses are correctly
* routed to the HLP interface */
bar = ioread32be(ocn_bar1);
bar |= 2;
iowrite32be(bar, ocn_bar1);
iosync();

/* Set SRR0 to the reset vector and turn on MSR_IP */
mtspr(SPRN_SRR0, 0xfff00100);
mtspr(SPRN_SRR1, MSR_IP);

/* Do an rfi to jump back to firmware. Somewhat evil,
* but it works
*/
__asm__ __volatile__("rfi" : : : "memory");

/* Spin until reset happens. Shouldn't really get here */
for (;;) ;
}

void holly_power_off(void)
{
local_irq_disable();
/* No way to shut power off with software */
for (;;) ;
}

void holly_halt(void)
{
holly_power_off();
}

/*
* Called very early, device-tree isn't unflattened
*/
static int __init holly_probe(void)
{
unsigned long root = of_get_flat_dt_root();

if (!of_flat_dt_is_compatible(root, "ibm,holly"))
return 0;
return 1;
}

static int ppc750_machine_check_exception(struct pt_regs *regs)
{
const struct exception_table_entry *entry;

/* Are we prepared to handle this fault */
if ((entry = search_exception_tables(regs->nip)) != NULL) {
tsi108_clear_pci_cfg_error();
regs->msr |= MSR_RI;
regs->nip = entry->fixup;
return 1;
}
return 0;
}

define_machine(holly){
.name = "PPC750 GX/CL TSI",
.probe = holly_probe,
.setup_arch = holly_setup_arch,
.init_IRQ = holly_init_IRQ,
.show_cpuinfo = holly_show_cpuinfo,
.get_irq = mpic_get_irq,
.restart = holly_restart,
.calibrate_decr = generic_calibrate_decr,
.machine_check_exception = ppc750_machine_check_exception,
.progress = udbg_progress,
};

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