[4/5] powerpc: PA Semi PWRficient platform support
Olof Johansson
olof at lixom.net
Wed Sep 6 03:28:53 EST 2006
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 at lixom.net>
Index: merge/arch/powerpc/Kconfig
===================================================================
--- merge.orig/arch/powerpc/Kconfig
+++ merge/arch/powerpc/Kconfig
@@ -413,6 +409,17 @@ 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
Index: merge/arch/powerpc/platforms/Makefile
===================================================================
--- merge.orig/arch/powerpc/platforms/Makefile
+++ merge/arch/powerpc/platforms/Makefile
@@ -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/
Index: merge/arch/powerpc/platforms/pasemi/Makefile
===================================================================
--- /dev/null
+++ merge/arch/powerpc/platforms/pasemi/Makefile
@@ -0,0 +1 @@
+obj-y += setup.o pci.o time.o
Index: merge/arch/powerpc/platforms/pasemi/pci.c
===================================================================
--- /dev/null
+++ merge/arch/powerpc/platforms/pasemi/pci.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Authors: Kip Walker, PA Semi
+ * Olof Johansson, PA Semi
+ *
+ * Maintained by: Olof Johansson <olof at 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
+ */
+
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/iommu.h>
+
+#include <asm/ppc-pci.h>
+#include <asm/udbg.h>
+
+#define PA_PXP_CFA(bus, devfn, off) (((bus) << 20) | ((devfn) << 12) | (off))
+
+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;
+
+ 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;
+
+ 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, 0x1000000);
+}
+
+static int __init add_bridge(struct device_node *dev)
+{
+ int len;
+ struct pci_controller *hose;
+ int *bus_range;
+ struct property *of_prop;
+
+ pr_debug("Adding PCI host bridge %s\n", dev->full_name);
+
+ bus_range = (int *) get_property(dev, "bus-range", &len);
+ if (bus_range == NULL || len < 2 * sizeof(int)) {
+ printk(KERN_WARNING "Can't get bus-range for %s, assume bus 0\n",
+ dev->full_name);
+ }
+
+ hose = pcibios_alloc_controller(dev);
+ if (hose == NULL)
+ return -ENOMEM;
+
+ hose->first_busno = bus_range ? bus_range[0] : 0;
+ hose->last_busno = bus_range ? bus_range[1] : 0xff;
+
+ of_prop = alloc_bootmem(sizeof(struct property) +
+ sizeof(hose->global_number));
+ if (of_prop) {
+ memset(of_prop, 0, sizeof(struct property));
+ of_prop->name = "linux,pci-domain";
+ of_prop->length = sizeof(hose->global_number);
+ of_prop->value = (unsigned char *)&of_prop[1];
+ memcpy(of_prop->value, &hose->global_number, sizeof(hose->global_number));
+ prom_add_property(dev, of_prop);
+ }
+
+ if (device_is_compatible(dev, "pa-pxp"))
+ setup_pa_pxp(hose);
+
+ printk(KERN_INFO "Found PA-PXP PCI host bridge. Firmware bus number: %d->%d\n",
+ hose->first_busno, hose->last_busno);
+
+ /* 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 == NULL) {
+ 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;
+}
Index: merge/arch/powerpc/platforms/pasemi/setup.c
===================================================================
--- /dev/null
+++ merge/arch/powerpc/platforms/pasemi/setup.c
@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Authors: Kip Walker, PA Semi
+ * Olof Johansson, PA Semi
+ *
+ * Maintained by: Olof Johansson <olof at 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
+ */
+
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/string.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/major.h>
+#include <linux/initrd.h>
+#include <linux/vt_kern.h>
+#include <linux/console.h>
+#include <linux/ide.h>
+#include <linux/pci.h>
+#include <linux/adb.h>
+#include <linux/cuda.h>
+#include <linux/pmu.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/serial.h>
+#include <linux/smp.h>
+
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/prom.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/machdep.h>
+#include <asm/dma.h>
+#include <asm/cputable.h>
+#include <asm/time.h>
+#include <asm/of_device.h>
+#include <asm/lmb.h>
+#include <asm/mpic.h>
+#include <asm/smp.h>
+#include <asm/udbg.h>
+#include <asm/serial.h>
+
+extern int pas_set_rtc_time(struct rtc_time *tm);
+extern void pas_get_rtc_time(struct rtc_time *tm);
+extern unsigned long pas_get_boot_time(void);
+extern void pas_pci_init(void);
+extern void pas_pcibios_fixup(void);
+
+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)
+{
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000;
+
+ /* Setup SMP callback */
+#ifdef CONFIG_SMP
+ 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 = NULL;
+ struct device_node *root, *mpic_node = NULL;
+ unsigned long openpic_addr = 0;
+ const unsigned int *opprop;
+ int naddr, opplen;
+ struct mpic *mpic;
+
+ np = of_find_node_by_type(np, "open-pic");
+ if (!np) {
+ printk(KERN_ERR "No interrupt controller in device tree.\n");
+ return;
+ }
+ mpic_node = of_node_get(np);
+
+ /* 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 != 0) {
+ 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 == NULL);
+
+ 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,
+ .set_rtc_time = pas_set_rtc_time,
+ .get_rtc_time = pas_get_rtc_time,
+ .calibrate_decr = generic_calibrate_decr,
+ .check_legacy_ioport = pas_check_legacy_ioport,
+ .progress = pas_progress,
+};
Index: merge/arch/powerpc/platforms/pasemi/time.c
===================================================================
--- /dev/null
+++ merge/arch/powerpc/platforms/pasemi/time.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2006 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <olof at 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
+ */
+
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/bcd.h>
+
+#include <asm/time.h>
+
+void pas_get_rtc_time(struct rtc_time *tm)
+{
+}
+
+int pas_set_rtc_time(struct rtc_time *tm)
+{
+ return -ENODEV;
+}
+
+unsigned long __init pas_get_boot_time(void)
+{
+#if 0
+ struct rtc_time tm;
+
+ pas_get_rtc_time(&tm);
+
+ return mktime(tm.tm_year+1900, tm.tm_mon+1, tm.tm_mday,
+ tm.tm_hour, tm.tm_min, tm.tm_sec);
+#else
+ /* Let's just return a fake date right now */
+ return mktime(2006, 1, 1, 12, 0, 0);
+#endif
+}
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