summaryrefslogtreecommitdiffstats
path: root/arch/ppc/platforms/prpmc800.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc/platforms/prpmc800.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/ppc/platforms/prpmc800.c')
-rw-r--r--arch/ppc/platforms/prpmc800.c477
1 files changed, 477 insertions, 0 deletions
diff --git a/arch/ppc/platforms/prpmc800.c b/arch/ppc/platforms/prpmc800.c
new file mode 100644
index 000000000000..8b09fa69b35b
--- /dev/null
+++ b/arch/ppc/platforms/prpmc800.c
@@ -0,0 +1,477 @@
+/*
+ * arch/ppc/platforms/prpmc800.c
+ *
+ * Author: Dale Farnsworth <dale.farnsworth@mvista.com>
+ *
+ * 2001-2004 (c) MontaVista, Software, Inc. This file is licensed under
+ * the terms of the GNU General Public License version 2. This program
+ * is licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ */
+
+#include <linux/config.h>
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/reboot.h>
+#include <linux/pci.h>
+#include <linux/kdev_t.h>
+#include <linux/types.h>
+#include <linux/major.h>
+#include <linux/initrd.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/ide.h>
+#include <linux/root_dev.h>
+#include <linux/harrier_defs.h>
+
+#include <asm/byteorder.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/page.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/pci-bridge.h>
+#include <asm/open_pic.h>
+#include <asm/bootinfo.h>
+#include <asm/harrier.h>
+
+#include "prpmc800.h"
+
+#define HARRIER_REVI_REG (PRPMC800_HARRIER_XCSR_BASE+HARRIER_REVI_OFF)
+#define HARRIER_UCTL_REG (PRPMC800_HARRIER_XCSR_BASE+HARRIER_UCTL_OFF)
+#define HARRIER_MISC_CSR_REG (PRPMC800_HARRIER_XCSR_BASE+HARRIER_MISC_CSR_OFF)
+#define HARRIER_IFEVP_REG (PRPMC800_HARRIER_MPIC_BASE+HARRIER_MPIC_IFEVP_OFF)
+#define HARRIER_IFEDE_REG (PRPMC800_HARRIER_MPIC_BASE+HARRIER_MPIC_IFEDE_OFF)
+#define HARRIER_FEEN_REG (PRPMC800_HARRIER_XCSR_BASE+HARRIER_FEEN_OFF)
+#define HARRIER_FEMA_REG (PRPMC800_HARRIER_XCSR_BASE+HARRIER_FEMA_OFF)
+
+#define HARRIER_VENI_REG (PRPMC800_HARRIER_XCSR_BASE + HARRIER_VENI_OFF)
+#define HARRIER_MISC_CSR (PRPMC800_HARRIER_XCSR_BASE + \
+ HARRIER_MISC_CSR_OFF)
+
+#define MONARCH (monarch != 0)
+#define NON_MONARCH (monarch == 0)
+
+extern int mpic_init(void);
+extern unsigned long loops_per_jiffy;
+extern void gen550_progress(char *, unsigned short);
+
+static int monarch = 0;
+static int found_self = 0;
+static int self = 0;
+
+static u_char prpmc800_openpic_initsenses[] __initdata =
+{
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HOSTINT0 */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_DEBUGINT */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HARRIER_WDT */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HOSTINT1 */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HOSTINT2 */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HOSTINT3 */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_PMC_INTA */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_PMC_INTB */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_PMC_INTC */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_PMC_INTD */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_UNUSED */
+ (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PRPMC800_INT_HARRIER_INT (UARTS, ABORT, DMA) */
+};
+
+/*
+ * Motorola PrPMC750/PrPMC800 in PrPMCBASE or PrPMC-Carrier
+ * Combined irq tables. Only Base has IDSEL 14, only Carrier has 21 and 22.
+ */
+static inline int
+prpmc_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
+{
+ static char pci_irq_table[][4] =
+ /*
+ * PCI IDSEL/INTPIN->INTLINE
+ * A B C D
+ */
+ {
+ {12, 0, 0, 0}, /* IDSEL 14 - Ethernet, base */
+ {0, 0, 0, 0}, /* IDSEL 15 - unused */
+ {10, 11, 12, 9}, /* IDSEL 16 - PMC A1, PMC1 */
+ {10, 11, 12, 9}, /* IDSEL 17 - PrPMC-A-B, PMC2-B */
+ {11, 12, 9, 10}, /* IDSEL 18 - PMC A1-B, PMC1-B */
+ {0, 0, 0, 0}, /* IDSEL 19 - unused */
+ {9, 10, 11, 12}, /* IDSEL 20 - P2P Bridge */
+ {11, 12, 9, 10}, /* IDSEL 21 - PMC A2, carrier */
+ {12, 9, 10, 11}, /* IDSEL 22 - PMC A2-B, carrier */
+ };
+ const long min_idsel = 14, max_idsel = 22, irqs_per_slot = 4;
+ return PCI_IRQ_TABLE_LOOKUP;
+};
+
+static int
+prpmc_read_config_dword(struct pci_controller *hose, u8 bus, u8 devfn,
+ int offset, u32 * val)
+{
+ /* paranoia */
+ if ((hose == NULL) ||
+ (hose->cfg_addr == NULL) || (hose->cfg_data == NULL))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ out_be32(hose->cfg_addr, ((offset & 0xfc) << 24) | (devfn << 16)
+ | ((bus - hose->bus_offset) << 8) | 0x80);
+ *val = in_le32((u32 *) (hose->cfg_data + (offset & 3)));
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+#define HARRIER_PCI_VEND_DEV_ID (PCI_VENDOR_ID_MOTOROLA | \
+ (PCI_DEVICE_ID_MOTOROLA_HARRIER << 16))
+static int prpmc_self(u8 bus, u8 devfn)
+{
+ /*
+ * Harriers always view themselves as being on bus 0. If we're not
+ * looking at bus 0, we're not going to find ourselves.
+ */
+ if (bus != 0)
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ else {
+ int result;
+ int val;
+ struct pci_controller *hose;
+
+ hose = pci_bus_to_hose(bus);
+
+ /* See if target device is a Harrier */
+ result = prpmc_read_config_dword(hose, bus, devfn,
+ PCI_VENDOR_ID, &val);
+ if ((result != PCIBIOS_SUCCESSFUL) ||
+ (val != HARRIER_PCI_VEND_DEV_ID))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /*
+ * LBA bit is set if target Harrier == initiating Harrier
+ * (i.e. if we are reading our own PCI header).
+ */
+ result = prpmc_read_config_dword(hose, bus, devfn,
+ HARRIER_LBA_OFF, &val);
+ if ((result != PCIBIOS_SUCCESSFUL) ||
+ ((val & HARRIER_LBA_MSK) != HARRIER_LBA_MSK))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ /* It's us, save our location for later */
+ self = devfn;
+ found_self = 1;
+ return PCIBIOS_SUCCESSFUL;
+ }
+}
+
+static int prpmc_exclude_device(u8 bus, u8 devfn)
+{
+ /*
+ * Monarch is allowed to access all PCI devices. Non-monarch is
+ * only allowed to access its own Harrier.
+ */
+
+ if (MONARCH)
+ return PCIBIOS_SUCCESSFUL;
+ if (found_self)
+ if ((bus == 0) && (devfn == self))
+ return PCIBIOS_SUCCESSFUL;
+ else
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ else
+ return prpmc_self(bus, devfn);
+}
+
+void __init prpmc800_find_bridges(void)
+{
+ struct pci_controller *hose;
+ int host_bridge;
+
+ hose = pcibios_alloc_controller();
+ if (!hose)
+ return;
+
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+
+ ppc_md.pci_exclude_device = prpmc_exclude_device;
+ ppc_md.pcibios_fixup = NULL;
+ ppc_md.pcibios_fixup_bus = NULL;
+ ppc_md.pci_swizzle = common_swizzle;
+ ppc_md.pci_map_irq = prpmc_map_irq;
+
+ setup_indirect_pci(hose,
+ PRPMC800_PCI_CONFIG_ADDR, PRPMC800_PCI_CONFIG_DATA);
+
+ /* Get host bridge vendor/dev id */
+
+ host_bridge = in_be32((uint *) (HARRIER_VENI_REG));
+
+ if (host_bridge != HARRIER_VEND_DEV_ID) {
+ printk(KERN_CRIT "Host bridge 0x%x not supported\n",
+ host_bridge);
+ return;
+ }
+
+ monarch = in_be32((uint *) HARRIER_MISC_CSR) & HARRIER_SYSCON;
+
+ printk(KERN_INFO "Running as %s.\n",
+ MONARCH ? "Monarch" : "Non-Monarch");
+
+ hose->io_space.start = PRPMC800_PCI_IO_START;
+ hose->io_space.end = PRPMC800_PCI_IO_END;
+ hose->io_base_virt = (void *)PRPMC800_ISA_IO_BASE;
+ hose->pci_mem_offset = PRPMC800_PCI_PHY_MEM_OFFSET;
+
+ pci_init_resource(&hose->io_resource,
+ PRPMC800_PCI_IO_START, PRPMC800_PCI_IO_END,
+ IORESOURCE_IO, "PCI host bridge");
+
+ if (MONARCH) {
+ hose->mem_space.start = PRPMC800_PCI_MEM_START;
+ hose->mem_space.end = PRPMC800_PCI_MEM_END;
+
+ pci_init_resource(&hose->mem_resources[0],
+ PRPMC800_PCI_MEM_START,
+ PRPMC800_PCI_MEM_END,
+ IORESOURCE_MEM, "PCI host bridge");
+
+ if (harrier_init(hose,
+ PRPMC800_HARRIER_XCSR_BASE,
+ PRPMC800_PROC_PCI_MEM_START,
+ PRPMC800_PROC_PCI_MEM_END,
+ PRPMC800_PROC_PCI_IO_START,
+ PRPMC800_PROC_PCI_IO_END,
+ PRPMC800_HARRIER_MPIC_BASE) != 0)
+ printk(KERN_CRIT "Could not initialize HARRIER "
+ "bridge\n");
+
+ harrier_release_eready(PRPMC800_HARRIER_XCSR_BASE);
+ harrier_wait_eready(PRPMC800_HARRIER_XCSR_BASE);
+ hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
+
+ } else {
+ pci_init_resource(&hose->mem_resources[0],
+ PRPMC800_NM_PCI_MEM_START,
+ PRPMC800_NM_PCI_MEM_END,
+ IORESOURCE_MEM, "PCI host bridge");
+
+ hose->mem_space.start = PRPMC800_NM_PCI_MEM_START;
+ hose->mem_space.end = PRPMC800_NM_PCI_MEM_END;
+
+ if (harrier_init(hose,
+ PRPMC800_HARRIER_XCSR_BASE,
+ PRPMC800_NM_PROC_PCI_MEM_START,
+ PRPMC800_NM_PROC_PCI_MEM_END,
+ PRPMC800_PROC_PCI_IO_START,
+ PRPMC800_PROC_PCI_IO_END,
+ PRPMC800_HARRIER_MPIC_BASE) != 0)
+ printk(KERN_CRIT "Could not initialize HARRIER "
+ "bridge\n");
+
+ harrier_setup_nonmonarch(PRPMC800_HARRIER_XCSR_BASE,
+ HARRIER_ITSZ_1MB);
+ harrier_release_eready(PRPMC800_HARRIER_XCSR_BASE);
+ }
+}
+
+static int prpmc800_show_cpuinfo(struct seq_file *m)
+{
+ seq_printf(m, "machine\t\t: PrPMC800\n");
+
+ return 0;
+}
+
+static void __init prpmc800_setup_arch(void)
+{
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000 / HZ;
+
+ /* Lookup PCI host bridges */
+ prpmc800_find_bridges();
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start)
+ ROOT_DEV = Root_RAM0;
+ else
+#endif
+#ifdef CONFIG_ROOT_NFS
+ ROOT_DEV = Root_NFS;
+#else
+ ROOT_DEV = Root_SDA2;
+#endif
+
+ printk(KERN_INFO "Port by MontaVista Software, Inc. "
+ "(source@mvista.com)\n");
+}
+
+/*
+ * Compute the PrPMC800's tbl frequency using the baud clock as a reference.
+ */
+static void __init prpmc800_calibrate_decr(void)
+{
+ unsigned long tbl_start, tbl_end;
+ unsigned long current_state, old_state, tb_ticks_per_second;
+ unsigned int count;
+ unsigned int harrier_revision;
+
+ harrier_revision = readb(HARRIER_REVI_REG);
+ if (harrier_revision < 2) {
+ /* XTAL64 was broken in harrier revision 1 */
+ printk(KERN_INFO "time_init: Harrier revision %d, assuming "
+ "100 Mhz bus\n", harrier_revision);
+ tb_ticks_per_second = 100000000 / 4;
+ tb_ticks_per_jiffy = tb_ticks_per_second / HZ;
+ tb_to_us = mulhwu_scale_factor(tb_ticks_per_second, 1000000);
+ return;
+ }
+
+ /*
+ * The XTAL64 bit oscillates at the 1/64 the base baud clock
+ * Set count to XTAL64 cycles per second. Since we'll count
+ * half-cycles, we'll reach the count in half a second.
+ */
+ count = PRPMC800_BASE_BAUD / 64;
+
+ /* Find the first edge of the baud clock */
+ old_state = readb(HARRIER_UCTL_REG) & HARRIER_XTAL64_MASK;
+ do {
+ current_state = readb(HARRIER_UCTL_REG) & HARRIER_XTAL64_MASK;
+ } while (old_state == current_state);
+
+ old_state = current_state;
+
+ /* Get the starting time base value */
+ tbl_start = get_tbl();
+
+ /*
+ * Loop until we have found a number of edges (half-cycles)
+ * equal to the count (half a second)
+ */
+ do {
+ do {
+ current_state = readb(HARRIER_UCTL_REG) &
+ HARRIER_XTAL64_MASK;
+ } while (old_state == current_state);
+ old_state = current_state;
+ } while (--count);
+
+ /* Get the ending time base value */
+ tbl_end = get_tbl();
+
+ /* We only counted for half a second, so double to get ticks/second */
+ tb_ticks_per_second = (tbl_end - tbl_start) * 2;
+ tb_ticks_per_jiffy = tb_ticks_per_second / HZ;
+ tb_to_us = mulhwu_scale_factor(tb_ticks_per_second, 1000000);
+}
+
+static void prpmc800_restart(char *cmd)
+{
+ ulong temp;
+
+ local_irq_disable();
+ temp = in_be32((uint *) HARRIER_MISC_CSR_REG);
+ temp |= HARRIER_RSTOUT;
+ out_be32((uint *) HARRIER_MISC_CSR_REG, temp);
+ while (1) ;
+}
+
+static void prpmc800_halt(void)
+{
+ local_irq_disable();
+ while (1) ;
+}
+
+static void prpmc800_power_off(void)
+{
+ prpmc800_halt();
+}
+
+static void __init prpmc800_init_IRQ(void)
+{
+ OpenPIC_InitSenses = prpmc800_openpic_initsenses;
+ OpenPIC_NumInitSenses = sizeof(prpmc800_openpic_initsenses);
+
+ /* Setup external interrupt sources. */
+ openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
+ /* Setup internal UART interrupt source. */
+ openpic_set_sources(16, 1, OpenPIC_Addr + 0x10200);
+
+ /* Do the MPIC initialization based on the above settings. */
+ openpic_init(0);
+
+ /* enable functional exceptions for uarts and abort */
+ out_8((u8 *) HARRIER_FEEN_REG, (HARRIER_FE_UA0 | HARRIER_FE_UA1));
+ out_8((u8 *) HARRIER_FEMA_REG, ~(HARRIER_FE_UA0 | HARRIER_FE_UA1));
+}
+
+/*
+ * Set BAT 3 to map 0xf0000000 to end of physical memory space.
+ */
+static __inline__ void prpmc800_set_bat(void)
+{
+ mb();
+ mtspr(SPRN_DBAT1U, 0xf0001ffe);
+ mtspr(SPRN_DBAT1L, 0xf000002a);
+ mb();
+}
+
+/*
+ * We need to read the Harrier memory controller
+ * to properly determine this value
+ */
+static unsigned long __init prpmc800_find_end_of_memory(void)
+{
+ /* Read the memory size from the Harrier XCSR */
+ return harrier_get_mem_size(PRPMC800_HARRIER_XCSR_BASE);
+}
+
+static void __init prpmc800_map_io(void)
+{
+ io_block_mapping(0x80000000, 0x80000000, 0x10000000, _PAGE_IO);
+ io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
+}
+
+void __init
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+ parse_bootinfo(find_bootinfo());
+
+ prpmc800_set_bat();
+
+ isa_io_base = PRPMC800_ISA_IO_BASE;
+ isa_mem_base = PRPMC800_ISA_MEM_BASE;
+ pci_dram_offset = PRPMC800_PCI_DRAM_OFFSET;
+
+ ppc_md.setup_arch = prpmc800_setup_arch;
+ ppc_md.show_cpuinfo = prpmc800_show_cpuinfo;
+ ppc_md.init_IRQ = prpmc800_init_IRQ;
+ ppc_md.get_irq = openpic_get_irq;
+
+ ppc_md.find_end_of_memory = prpmc800_find_end_of_memory;
+ ppc_md.setup_io_mappings = prpmc800_map_io;
+
+ ppc_md.restart = prpmc800_restart;
+ ppc_md.power_off = prpmc800_power_off;
+ ppc_md.halt = prpmc800_halt;
+
+ /* PrPMC800 has no timekeeper part */
+ ppc_md.time_init = NULL;
+ ppc_md.get_rtc_time = NULL;
+ ppc_md.set_rtc_time = NULL;
+ ppc_md.calibrate_decr = prpmc800_calibrate_decr;
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+ ppc_md.progress = gen550_progress;
+#else /* !CONFIG_SERIAL_TEXT_DEBUG */
+ ppc_md.progress = NULL;
+#endif /* CONFIG_SERIAL_TEXT_DEBUG */
+}