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-rw-r--r--arch/ppc/platforms/powerpmc250.c383
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diff --git a/arch/ppc/platforms/powerpmc250.c b/arch/ppc/platforms/powerpmc250.c
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+/*
+ * arch/ppc/platforms/powerpmc250.c
+ *
+ * Board setup routines for Force PowerPMC-250 Processor PMC
+ *
+ * Author: Troy Benjegerdes <tbenjegerdes@mvista.com>
+ * Borrowed heavily from prpmc750_*.c by
+ * Matt Porter <mporter@mvista.com>
+ *
+ * 2001 (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/slab.h>
+#include <linux/seq_file.h>
+#include <linux/ide.h>
+#include <linux/root_dev.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 <platforms/powerpmc250.h>
+#include <asm/open_pic.h>
+#include <asm/pci-bridge.h>
+#include <asm/mpc10x.h>
+#include <asm/uaccess.h>
+#include <asm/bootinfo.h>
+
+extern void powerpmc250_find_bridges(void);
+extern unsigned long loops_per_jiffy;
+
+static u_char powerpmc250_openpic_initsenses[] __initdata =
+{
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 1, /* PMC INTA (also MPC107 output interrupt INTA) */
+ 1, /* PMC INTB (also I82559 Ethernet controller) */
+ 1, /* PMC INTC */
+ 1, /* PMC INTD */
+ 0, /* DUART interrupt (active high) */
+};
+
+static int
+powerpmc250_show_cpuinfo(struct seq_file *m)
+{
+ seq_printf(m,"machine\t\t: Force PowerPMC250\n");
+
+ return 0;
+}
+
+static void __init
+powerpmc250_setup_arch(void)
+{
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000/HZ;
+
+ /* Lookup PCI host bridges */
+ powerpmc250_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("Force PowerPMC250 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");
+}
+
+#if 0
+/*
+ * Compute the PrPMC750's bus speed using the baud clock as a
+ * reference.
+ */
+unsigned long __init powerpmc250_get_bus_speed(void)
+{
+ unsigned long tbl_start, tbl_end;
+ unsigned long current_state, old_state, bus_speed;
+ unsigned char lcr, dll, dlm;
+ int baud_divisor, count;
+
+ /* Read the UART's baud clock divisor */
+ lcr = readb(PRPMC750_SERIAL_0_LCR);
+ writeb(lcr | UART_LCR_DLAB, PRPMC750_SERIAL_0_LCR);
+ dll = readb(PRPMC750_SERIAL_0_DLL);
+ dlm = readb(PRPMC750_SERIAL_0_DLM);
+ writeb(lcr & ~UART_LCR_DLAB, PRPMC750_SERIAL_0_LCR);
+ baud_divisor = (dlm << 8) | dll;
+
+ /*
+ * Use the baud clock divisor and base baud clock
+ * to determine the baud rate and use that as
+ * the number of baud clock edges we use for
+ * the time base sample. Make it half the baud
+ * rate.
+ */
+ count = PRPMC750_BASE_BAUD / (baud_divisor * 16);
+
+ /* Find the first edge of the baud clock */
+ old_state = readb(PRPMC750_STATUS_REG) & PRPMC750_BAUDOUT_MASK;
+ do {
+ current_state = readb(PRPMC750_STATUS_REG) &
+ PRPMC750_BAUDOUT_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 equal
+ * to half the count (half the baud rate)
+ */
+ do {
+ do {
+ current_state = readb(PRPMC750_STATUS_REG) &
+ PRPMC750_BAUDOUT_MASK;
+ } while(old_state == current_state);
+ old_state = current_state;
+ } while (--count);
+
+ /* Get the ending time base value */
+ tbl_end = get_tbl();
+
+ /* Compute bus speed */
+ bus_speed = (tbl_end-tbl_start)*128;
+
+ return bus_speed;
+}
+#endif
+
+static void __init
+powerpmc250_calibrate_decr(void)
+{
+ unsigned long freq;
+ int divisor = 4;
+
+ //freq = powerpmc250_get_bus_speed();
+#warning hardcoded bus freq
+ freq = 100000000;
+
+ tb_ticks_per_jiffy = freq / (HZ * divisor);
+ tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
+}
+
+static void
+powerpmc250_restart(char *cmd)
+{
+ local_irq_disable();
+ /* Hard reset */
+ writeb(0x11, 0xfe000332);
+ while(1);
+}
+
+static void
+powerpmc250_halt(void)
+{
+ local_irq_disable();
+ while (1);
+}
+
+static void
+powerpmc250_power_off(void)
+{
+ powerpmc250_halt();
+}
+
+static void __init
+powerpmc250_init_IRQ(void)
+{
+
+ OpenPIC_InitSenses = powerpmc250_openpic_initsenses;
+ OpenPIC_NumInitSenses = sizeof(powerpmc250_openpic_initsenses);
+ mpc10x_set_openpic();
+}
+
+/*
+ * Set BAT 3 to map 0xf0000000 to end of physical memory space.
+ */
+static __inline__ void
+powerpmc250_set_bat(void)
+{
+ unsigned long bat3u, bat3l;
+ static int mapping_set = 0;
+
+ if (!mapping_set)
+ {
+ __asm__ __volatile__(
+ " lis %0,0xf000\n \
+ ori %1,%0,0x002a\n \
+ ori %0,%0,0x1ffe\n \
+ mtspr 0x21e,%0\n \
+ mtspr 0x21f,%1\n \
+ isync\n \
+ sync "
+ : "=r" (bat3u), "=r" (bat3l));
+
+ mapping_set = 1;
+ }
+ return;
+}
+
+static unsigned long __init
+powerpmc250_find_end_of_memory(void)
+{
+ /* Cover I/O space with a BAT */
+ /* yuck, better hope your ram size is a power of 2 -- paulus */
+ powerpmc250_set_bat();
+
+ return mpc10x_get_mem_size(MPC10X_MEM_MAP_B);
+}
+
+static void __init
+powerpmc250_map_io(void)
+{
+ io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _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());
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if ( r4 )
+ {
+ initrd_start = r4 + KERNELBASE;
+ initrd_end = r5 + KERNELBASE;
+ }
+#endif
+
+ /* Copy cmd_line parameters */
+ if ( r6)
+ {
+ *(char *)(r7 + KERNELBASE) = 0;
+ strcpy(cmd_line, (char *)(r6 + KERNELBASE));
+ }
+
+ isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
+ isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
+ pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
+
+ ppc_md.setup_arch = powerpmc250_setup_arch;
+ ppc_md.show_cpuinfo = powerpmc250_show_cpuinfo;
+ ppc_md.init_IRQ = powerpmc250_init_IRQ;
+ ppc_md.get_irq = openpic_get_irq;
+
+ ppc_md.find_end_of_memory = powerpmc250_find_end_of_memory;
+ ppc_md.setup_io_mappings = powerpmc250_map_io;
+
+ ppc_md.restart = powerpmc250_restart;
+ ppc_md.power_off = powerpmc250_power_off;
+ ppc_md.halt = powerpmc250_halt;
+
+ /* PowerPMC250 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 = powerpmc250_calibrate_decr;
+}
+
+
+/*
+ * (This used to be arch/ppc/platforms/powerpmc250_pci.c)
+ *
+ * PCI support for Force PowerPMC250
+ *
+ */
+
+#undef DEBUG
+#ifdef DEBUG
+#define DBG(x...) printk(x)
+#else
+#define DBG(x...)
+#endif /* DEBUG */
+
+static inline int __init
+powerpmc250_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
+ */
+ {
+ {17, 0, 0, 0}, /* Device 11 - 82559 */
+ {0, 0, 0, 0}, /* 12 */
+ {0, 0, 0, 0}, /* 13 */
+ {0, 0, 0, 0}, /* 14 */
+ {0, 0, 0, 0}, /* 15 */
+ {16, 17, 18, 19}, /* Device 16 - PMC A1?? */
+ };
+ const long min_idsel = 11, max_idsel = 16, irqs_per_slot = 4;
+ return PCI_IRQ_TABLE_LOOKUP;
+};
+
+static int
+powerpmc250_exclude_device(u_char bus, u_char devfn)
+{
+ /*
+ * While doing PCI Scan the MPC107 will 'detect' itself as
+ * device on the PCI Bus, will create an incorrect response and
+ * later will respond incorrectly to Configuration read coming
+ * from another device.
+ *
+ * The work around is that when doing a PCI Scan one
+ * should skip its own device number in the scan.
+ *
+ * The top IDsel is AD13 and the middle is AD14.
+ *
+ * -- Note from force
+ */
+
+ if ((bus == 0) && (PCI_SLOT(devfn) == 13 || PCI_SLOT(devfn) == 14)) {
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+ else {
+ return PCIBIOS_SUCCESSFUL;
+ }
+}
+
+void __init
+powerpmc250_find_bridges(void)
+{
+ struct pci_controller* hose;
+
+ hose = pcibios_alloc_controller();
+ if (!hose){
+ printk("Can't allocate PCI 'hose' structure!!!\n");
+ return;
+ }
+
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+
+ if (mpc10x_bridge_init(hose,
+ MPC10X_MEM_MAP_B,
+ MPC10X_MEM_MAP_B,
+ MPC10X_MAPB_EUMB_BASE) == 0) {
+
+ hose->mem_resources[0].end = 0xffffffff;
+
+ hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
+
+ /* ppc_md.pcibios_fixup = pcore_pcibios_fixup; */
+ ppc_md.pci_swizzle = common_swizzle;
+
+ ppc_md.pci_exclude_device = powerpmc250_exclude_device;
+ ppc_md.pci_map_irq = powerpmc250_map_irq;
+ } else {
+ if (ppc_md.progress)
+ ppc_md.progress("Bridge init failed", 0x100);
+ printk("Host bridge init failed\n");
+ }
+
+}
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