[PATCH v3 4/7] Add support for 750CL Holly board
Josh Boyer
jwboyer at linux.vnet.ibm.com
Tue May 8 00:53:24 EST 2007
Add PowerPC 750 Holly/Hickory platform support
Signed-off-by: Stephen Winiecki <stevewin at us.ibm.com>
Signed-off-by: Josh Boyer <jwboyer at linux.vnet.ibm.com>
---
arch/powerpc/Kconfig | 2
arch/powerpc/platforms/embedded6xx/Kconfig | 14 -
arch/powerpc/platforms/embedded6xx/Makefile | 1
arch/powerpc/platforms/embedded6xx/holly.c | 316 ++++++++++++++++++++++++++++
4 files changed, 329 insertions(+), 4 deletions(-)
--- linux-2.6.orig/arch/powerpc/Kconfig
+++ linux-2.6/arch/powerpc/Kconfig
@@ -659,7 +659,7 @@ 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
--- linux-2.6.orig/arch/powerpc/platforms/embedded6xx/Kconfig
+++ linux-2.6/arch/powerpc/platforms/embedded6xx/Kconfig
@@ -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
--- linux-2.6.orig/arch/powerpc/platforms/embedded6xx/Makefile
+++ linux-2.6/arch/powerpc/platforms/embedded6xx/Makefile
@@ -3,3 +3,4 @@
#
obj-$(CONFIG_MPC7448HPC2) += mpc7448_hpc2.o
obj-$(CONFIG_LINKSTATION) += linkstation.o ls_uart.o
+obj-$(CONFIG_PPC_HOLLY) += holly.o
--- /dev/null
+++ linux-2.6/arch/powerpc/platforms/embedded6xx/holly.c
@@ -0,0 +1,316 @@
+/*
+ * Board setup routines for the IBM 750GX/CL platform w/ TSI10x bridge
+ *
+ * Copyright 2007 IBM Corporation
+ *
+ * Stephen Winiecki <stevewin at us.ibm.com>
+ * Josh Boyer <jwboyer at 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 0x7e000000
+
+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 != 0) {
+ const unsigned int *fp;
+
+ fp = of_get_property(cpu, "clock-frequency", NULL);
+ if (fp != 0)
+ 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();
+
+ for (np = NULL; (np = of_find_node_by_type(np, "pci")) != NULL;)
+ tsi108_setup_pci(np, HOLLY_PCI_CFG_PHYS);
+
+ 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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