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!

1 files changed, 383 insertions, 0 deletions

diff --git a/arch/ppc/platforms/powerpmc250.c b/arch/ppc/platforms/powerpmc250.c
new file mode 100644
index 000000000000..0abe15159e6c
--- /dev/null
+++ b/arch/ppc/platforms/powerpmc250.c
@@ -0,0 +1,383 @@
+/*
+ * 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");
+	}
+
+}