Linux-2.6.12-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, 325 insertions, 0 deletions

diff --git a/arch/ppc/platforms/spruce.c b/arch/ppc/platforms/spruce.c
new file mode 100644
index 00000000000..5ad70d357cb
--- /dev/null
+++ b/arch/ppc/platforms/spruce.c
@@ -0,0 +1,325 @@
+/*
+ * arch/ppc/platforms/spruce.c
+ *
+ * Board and PCI setup routines for IBM Spruce
+ *
+ * Author: MontaVista Software <source@mvista.com>
+ *
+ * 2000-2004 (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/seq_file.h>
+#include <linux/ide.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/pgtable.h>
+#include <asm/page.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/todc.h>
+#include <asm/bootinfo.h>
+#include <asm/kgdb.h>
+
+#include <syslib/cpc700.h>
+
+#include "spruce.h"
+
+static inline int
+spruce_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
+		 */
+	{
+		{23, 24, 25, 26},	/* IDSEL 1 - PCI slot 3 */
+		{24, 25, 26, 23},	/* IDSEL 2 - PCI slot 2 */
+		{25, 26, 23, 24},	/* IDSEL 3 - PCI slot 1 */
+		{26, 23, 24, 25},	/* IDSEL 4 - PCI slot 0 */
+	};
+
+	const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
+	return PCI_IRQ_TABLE_LOOKUP;
+}
+
+static void __init
+spruce_setup_hose(void)
+{
+	struct pci_controller *hose;
+
+	/* Setup hose */
+	hose = pcibios_alloc_controller();
+	if (!hose)
+		return;
+
+	hose->first_busno = 0;
+	hose->last_busno = 0xff;
+
+	pci_init_resource(&hose->io_resource,
+			SPRUCE_PCI_LOWER_IO,
+			SPRUCE_PCI_UPPER_IO,
+			IORESOURCE_IO,
+			"PCI host bridge");
+
+	pci_init_resource(&hose->mem_resources[0],
+			SPRUCE_PCI_LOWER_MEM,
+			SPRUCE_PCI_UPPER_MEM,
+			IORESOURCE_MEM,
+			"PCI host bridge");
+
+	hose->io_space.start = SPRUCE_PCI_LOWER_IO;
+	hose->io_space.end = SPRUCE_PCI_UPPER_IO;
+	hose->mem_space.start = SPRUCE_PCI_LOWER_MEM;
+	hose->mem_space.end = SPRUCE_PCI_UPPER_MEM;
+	hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE;
+
+	setup_indirect_pci(hose,
+			SPRUCE_PCI_CONFIG_ADDR,
+			SPRUCE_PCI_CONFIG_DATA);
+
+	hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
+
+	ppc_md.pci_swizzle = common_swizzle;
+	ppc_md.pci_map_irq = spruce_map_irq;
+}
+
+/*
+ * CPC700 PIC interrupt programming table
+ *
+ * First entry is the sensitivity (level/edge), second is the polarity.
+ */
+unsigned int cpc700_irq_assigns[32][2] = {
+	{ 1, 1 },       /* IRQ  0: ECC Correctable Error - rising edge */
+	{ 1, 1 },       /* IRQ  1: PCI Write Mem Range   - rising edge */
+	{ 0, 1 },       /* IRQ  2: PCI Write Command Reg - active high */
+	{ 0, 1 },       /* IRQ  3: UART 0                - active high */
+	{ 0, 1 },       /* IRQ  4: UART 1                - active high */
+	{ 0, 1 },       /* IRQ  5: ICC 0                 - active high */
+	{ 0, 1 },       /* IRQ  6: ICC 1                 - active high */
+	{ 0, 1 },       /* IRQ  7: GPT Compare 0         - active high */
+	{ 0, 1 },       /* IRQ  8: GPT Compare 1         - active high */
+	{ 0, 1 },       /* IRQ  9: GPT Compare 2         - active high */
+	{ 0, 1 },       /* IRQ 10: GPT Compare 3         - active high */
+	{ 0, 1 },       /* IRQ 11: GPT Compare 4         - active high */
+	{ 0, 1 },       /* IRQ 12: GPT Capture 0         - active high */
+	{ 0, 1 },       /* IRQ 13: GPT Capture 1         - active high */
+	{ 0, 1 },       /* IRQ 14: GPT Capture 2         - active high */
+	{ 0, 1 },       /* IRQ 15: GPT Capture 3         - active high */
+	{ 0, 1 },       /* IRQ 16: GPT Capture 4         - active high */
+	{ 0, 0 },       /* IRQ 17: Reserved */
+	{ 0, 0 },       /* IRQ 18: Reserved */
+	{ 0, 0 },       /* IRQ 19: Reserved */
+	{ 0, 1 },       /* IRQ 20: FPGA EXT_IRQ0         - active high */
+	{ 1, 1 },       /* IRQ 21: Mouse                 - rising edge */
+	{ 1, 1 },       /* IRQ 22: Keyboard              - rising edge */
+	{ 0, 0 },       /* IRQ 23: PCI Slot 3            - active low */
+	{ 0, 0 },       /* IRQ 24: PCI Slot 2            - active low */
+	{ 0, 0 },       /* IRQ 25: PCI Slot 1            - active low */
+	{ 0, 0 },       /* IRQ 26: PCI Slot 0            - active low */
+};
+
+static void __init
+spruce_calibrate_decr(void)
+{
+	int freq, divisor = 4;
+
+	/* determine processor bus speed */
+	freq = SPRUCE_BUS_SPEED;
+	tb_ticks_per_jiffy = freq / HZ / divisor;
+	tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
+}
+
+static int
+spruce_show_cpuinfo(struct seq_file *m)
+{
+	seq_printf(m, "vendor\t\t: IBM\n");
+	seq_printf(m, "machine\t\t: Spruce\n");
+
+	return 0;
+}
+
+static void __init
+spruce_early_serial_map(void)
+{
+	u32 uart_clk;
+	struct uart_port serial_req;
+
+	if (SPRUCE_UARTCLK_IS_33M(readb(SPRUCE_FPGA_REG_A)))
+		uart_clk = SPRUCE_BAUD_33M * 16;
+	else
+		uart_clk = SPRUCE_BAUD_30M * 16;
+
+	/* Setup serial port access */
+	memset(&serial_req, 0, sizeof(serial_req));
+	serial_req.uartclk = uart_clk;
+	serial_req.irq = UART0_INT;
+	serial_req.flags = ASYNC_BOOT_AUTOCONF;
+	serial_req.iotype = SERIAL_IO_MEM;
+	serial_req.membase = (u_char *)UART0_IO_BASE;
+	serial_req.regshift = 0;
+
+#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
+	gen550_init(0, &serial_req);
+#endif
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&serial_req) != 0)
+		printk("Early serial init of port 0 failed\n");
+#endif
+
+	/* Assume early_serial_setup() doesn't modify serial_req */
+	serial_req.line = 1;
+	serial_req.irq = UART1_INT;
+	serial_req.membase = (u_char *)UART1_IO_BASE;
+
+#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
+	gen550_init(1, &serial_req);
+#endif
+#ifdef CONFIG_SERIAL_8250
+	if (early_serial_setup(&serial_req) != 0)
+		printk("Early serial init of port 1 failed\n");
+#endif
+}
+
+TODC_ALLOC();
+
+static void __init
+spruce_setup_arch(void)
+{
+	/* Setup TODC access */
+	TODC_INIT(TODC_TYPE_DS1643, 0, 0, SPRUCE_RTC_BASE_ADDR, 8);
+
+	/* init to some ~sane value until calibrate_delay() runs */
+	loops_per_jiffy = 50000000 / HZ;
+
+	/* Setup PCI host bridge */
+	spruce_setup_hose();
+
+#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_SDA1;
+#endif
+
+	/* Identify the system */
+	printk(KERN_INFO "System Identification: IBM Spruce\n");
+	printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
+}
+
+static void
+spruce_restart(char *cmd)
+{
+	local_irq_disable();
+
+	/* SRR0 has system reset vector, SRR1 has default MSR value */
+	/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
+	__asm__ __volatile__
+	("\n\
+	lis	3,0xfff0	\n\
+	ori	3,3,0x0100	\n\
+	mtspr	26,3		\n\
+	li	3,0		\n\
+	mtspr	27,3		\n\
+	rfi			\n\
+	");
+	for(;;);
+}
+
+static void
+spruce_power_off(void)
+{
+	for(;;);
+}
+
+static void
+spruce_halt(void)
+{
+	spruce_restart(NULL);
+}
+
+static void __init
+spruce_map_io(void)
+{
+	io_block_mapping(SPRUCE_PCI_IO_BASE, SPRUCE_PCI_PHY_IO_BASE,
+			 0x08000000, _PAGE_IO);
+}
+
+/*
+ * Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
+ */
+static __inline__ void
+spruce_set_bat(void)
+{
+	mb();
+	mtspr(SPRN_DBAT1U, 0xf8000ffe);
+	mtspr(SPRN_DBAT1L, 0xf800002a);
+	mb();
+}
+
+void __init
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+	      unsigned long r6, unsigned long r7)
+{
+	parse_bootinfo(find_bootinfo());
+
+	/* Map in board regs, etc. */
+	spruce_set_bat();
+
+	isa_io_base = SPRUCE_ISA_IO_BASE;
+	pci_dram_offset = SPRUCE_PCI_SYS_MEM_BASE;
+
+	ppc_md.setup_arch = spruce_setup_arch;
+	ppc_md.show_cpuinfo = spruce_show_cpuinfo;
+	ppc_md.init_IRQ = cpc700_init_IRQ;
+	ppc_md.get_irq = cpc700_get_irq;
+
+	ppc_md.setup_io_mappings = spruce_map_io;
+
+	ppc_md.restart = spruce_restart;
+	ppc_md.power_off = spruce_power_off;
+	ppc_md.halt = spruce_halt;
+
+	ppc_md.time_init = todc_time_init;
+	ppc_md.set_rtc_time = todc_set_rtc_time;
+	ppc_md.get_rtc_time = todc_get_rtc_time;
+	ppc_md.calibrate_decr = spruce_calibrate_decr;
+
+	ppc_md.nvram_read_val = todc_direct_read_val;
+	ppc_md.nvram_write_val = todc_direct_write_val;
+
+	spruce_early_serial_map();
+
+#ifdef CONFIG_SERIAL_TEXT_DEBUG
+	ppc_md.progress = gen550_progress;
+#endif /* CONFIG_SERIAL_TEXT_DEBUG */
+#ifdef CONFIG_KGDB
+	ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
+#endif
+}