1 files changed, 317 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/embedded6xx/holly.c b/arch/powerpc/platforms/embedded6xx/holly.c
new file mode 100644
index 000000000000..3a0b4a01401c
--- /dev/null
+++ b/arch/powerpc/platforms/embedded6xx/holly.c
@@ -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,
+};