pplus.c

linux-2.6.15.6

					temp);
	}
}

void __init pplus_pcibios_fixup(void)
{

	unsigned char reg;
	unsigned short devid;
	unsigned char base_mod;

	printk(KERN_INFO "Setting PCI interrupts for a \"%s\"\n",
			Motherboard_map_name);

	/* Setup the Winbond or Via PIB */
	pplus_pib_init();

	/* Set up floppy in PS/2 mode */
	outb(0x09, SIO_CONFIG_RA);
	reg = inb(SIO_CONFIG_RD);
	reg = (reg & 0x3F) | 0x40;
	outb(reg, SIO_CONFIG_RD);
	outb(reg, SIO_CONFIG_RD);	/* Have to write twice to change! */

	/* This is a hack.  If this is a 2300 or 2400 mot board then there is
	 * no keyboard controller and we have to indicate that.
	 */

	early_read_config_word(0, 0, 0, PCI_VENDOR_ID, &devid);
	base_mod = inb(MOTOROLA_BASETYPE_REG);
	if ((devid == PCI_DEVICE_ID_MOTOROLA_HAWK) ||
	    (base_mod == 0xF9) || (base_mod == 0xFA) || (base_mod == 0xE1))
		prep_keybd_present = 0;
}

void __init pplus_find_bridges(void)
{
	struct pci_controller *hose;

	hose = pcibios_alloc_controller();
	if (!hose)
		return;

	hose->first_busno = 0;
	hose->last_busno = 0xff;

	hose->pci_mem_offset = PREP_ISA_MEM_BASE;
	hose->io_base_virt = (void *)PREP_ISA_IO_BASE;

	pci_init_resource(&hose->io_resource, PPLUS_PCI_IO_START,
			  PPLUS_PCI_IO_END, IORESOURCE_IO, "PCI host bridge");
	pci_init_resource(&hose->mem_resources[0], PPLUS_PROC_PCI_MEM_START,
			  PPLUS_PROC_PCI_MEM_END, IORESOURCE_MEM,
			  "PCI host bridge");

	hose->io_space.start = PPLUS_PCI_IO_START;
	hose->io_space.end = PPLUS_PCI_IO_END;
	hose->mem_space.start = PPLUS_PCI_MEM_START;
	hose->mem_space.end = PPLUS_PCI_MEM_END - HAWK_MPIC_SIZE;

	if (hawk_init(hose, PPLUS_HAWK_PPC_REG_BASE, PPLUS_PROC_PCI_MEM_START,
				PPLUS_PROC_PCI_MEM_END - HAWK_MPIC_SIZE,
				PPLUS_PROC_PCI_IO_START, PPLUS_PROC_PCI_IO_END,
				PPLUS_PROC_PCI_MEM_END - HAWK_MPIC_SIZE + 1)
			!= 0) {
		printk(KERN_CRIT "Could not initialize host bridge\n");

	}

	pplus_set_VIA_IDE_legacy();

	hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);

	ppc_md.pcibios_fixup = pplus_pcibios_fixup;
	ppc_md.pci_swizzle = common_swizzle;
}

static int pplus_show_cpuinfo(struct seq_file *m)
{
	seq_printf(m, "vendor\t\t: Motorola MCG\n");
	seq_printf(m, "machine\t\t: %s\n", Motherboard_map_name);

	return 0;
}

static void __init pplus_setup_arch(void)
{
	struct pci_controller *hose;

	if (ppc_md.progress)
		ppc_md.progress("pplus_setup_arch: enter", 0);

	/* init to some ~sane value until calibrate_delay() runs */
	loops_per_jiffy = 50000000;

	if (ppc_md.progress)
		ppc_md.progress("pplus_setup_arch: find_bridges", 0);

	/* Setup PCI host bridge */
	pplus_find_bridges();

	hose = pci_bus_to_hose(0);
	isa_io_base = (ulong) hose->io_base_virt;

	if (ppc_md.progress)
		ppc_md.progress("pplus_setup_arch: set_board_type", 0);

	pplus_set_board_type();

	/* Enable L2.  Assume we don't need to flush -- Cort */
	*(unsigned char *)(PPLUS_L2_CONTROL_REG) |= 3;

#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 "Motorola PowerPlus Platform\n");
	printk(KERN_INFO
	       "Port by MontaVista Software, Inc. ([e-mail])\n");

#ifdef CONFIG_VGA_CONSOLE
	/* remap the VGA memory */
	vgacon_remap_base = (unsigned long)ioremap(PPLUS_ISA_MEM_BASE,
						   0x08000000);
	conswitchp = &vga_con;
#endif
#ifdef CONFIG_PPCBUG_NVRAM
	/* Read in NVRAM data */
	init_prep_nvram();

	/* if no bootargs, look in NVRAM */
	if (cmd_line[0] == '\0') {
		char *bootargs;
		bootargs = prep_nvram_get_var("bootargs");
		if (bootargs != NULL) {
			strcpy(cmd_line, bootargs);
			/* again.. */
			strcpy(saved_command_line, cmd_line);
		}
	}
#endif
	if (ppc_md.progress)
		ppc_md.progress("pplus_setup_arch: exit", 0);
}

static void pplus_restart(char *cmd)
{
	unsigned long i = 10000;

	local_irq_disable();

	/* set VIA IDE controller into native mode */
	pplus_set_VIA_IDE_native();

	/* set exception prefix high - to the prom */
	_nmask_and_or_msr(0, MSR_IP);

	/* make sure bit 0 (reset) is a 0 */
	outb(inb(0x92) & ~1L, 0x92);
	/* signal a reset to system control port A - soft reset */
	outb(inb(0x92) | 1, 0x92);

	while (i != 0)
		i++;
	panic("restart failed\n");
}

static void pplus_halt(void)
{
	/* set exception prefix high - to the prom */
	_nmask_and_or_msr(MSR_EE, MSR_IP);

	/* make sure bit 0 (reset) is a 0 */
	outb(inb(0x92) & ~1L, 0x92);
	/* signal a reset to system control port A - soft reset */
	outb(inb(0x92) | 1, 0x92);

	while (1) ;
	/*
	 * Not reached
	 */
}

static void pplus_power_off(void)
{
	pplus_halt();
}

static void __init pplus_init_IRQ(void)
{
	int i;

	if (ppc_md.progress)
		ppc_md.progress("init_irq: enter", 0);

	OpenPIC_InitSenses = pplus_openpic_initsenses;
	OpenPIC_NumInitSenses = sizeof(pplus_openpic_initsenses);

	if (OpenPIC_Addr != NULL) {

		openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
		openpic_init(NUM_8259_INTERRUPTS);
		openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
					i8259_irq);
		ppc_md.get_irq = openpic_get_irq;
	}

	i8259_init(0, 0);

	if (ppc_md.progress)
		ppc_md.progress("init_irq: exit", 0);
}

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
/*
 * IDE stuff.
 */
static int pplus_ide_default_irq(unsigned long base)
{
	switch (base) {
	case 0x1f0:
		return 14;
	case 0x170:
		return 15;
	default:
		return 0;
	}
}

static unsigned long pplus_ide_default_io_base(int index)
{
	switch (index) {
	case 0:
		return 0x1f0;
	case 1:
		return 0x170;
	default:
		return 0;
	}
}

static void __init
pplus_ide_init_hwif_ports(hw_regs_t * hw, unsigned long data_port,
			  unsigned long ctrl_port, int *irq)
{
	unsigned long reg = data_port;
	int i;

	for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
		hw->io_ports[i] = reg;
		reg += 1;
	}

	if (ctrl_port)
		hw->io_ports[IDE_CONTROL_OFFSET] = ctrl_port;
	else
		hw->io_ports[IDE_CONTROL_OFFSET] =
		    hw->io_ports[IDE_DATA_OFFSET] + 0x206;

	if (irq != NULL)
		*irq = pplus_ide_default_irq(data_port);
}
#endif

#ifdef CONFIG_SMP
/* PowerPlus (MTX) support */
static int __init smp_pplus_probe(void)
{
	extern int mot_multi;

	if (mot_multi) {
		openpic_request_IPIs();
		smp_hw_index[1] = 1;
		return 2;
	}

	return 1;
}

static void __init smp_pplus_kick_cpu(int nr)
{
	*(unsigned long *)KERNELBASE = nr;
	asm volatile ("dcbf 0,%0"::"r" (KERNELBASE):"memory");
	printk(KERN_INFO "CPU1 reset, waiting\n");
}

static void __init smp_pplus_setup_cpu(int cpu_nr)
{
	if (OpenPIC_Addr)
		do_openpic_setup_cpu();
}

static struct smp_ops_t pplus_smp_ops = {
	smp_openpic_message_pass,
	smp_pplus_probe,
	smp_pplus_kick_cpu,
	smp_pplus_setup_cpu,
	.give_timebase = smp_generic_give_timebase,
	.take_timebase = smp_generic_take_timebase,
};
#endif				/* CONFIG_SMP */

#ifdef DUMP_DBATS
static void print_dbat(int idx, u32 bat)
{

	char str[64];

	sprintf(str, "DBAT%c%c = 0x%08x\n",
		(char)((idx - DBAT0U) / 2) + '0', (idx & 1) ? 'L' : 'U', bat);
	ppc_md.progress(str, 0);
}

#define DUMP_DBAT(x) \
	do { \
	u32 __temp = mfspr(x);\
	print_dbat(x, __temp); \
	} while (0)

static void dump_dbats(void)
{
	if (ppc_md.progress) {
		DUMP_DBAT(DBAT0U);
		DUMP_DBAT(DBAT0L);
		DUMP_DBAT(DBAT1U);
		DUMP_DBAT(DBAT1L);
		DUMP_DBAT(DBAT2U);
		DUMP_DBAT(DBAT2L);
		DUMP_DBAT(DBAT3U);
		DUMP_DBAT(DBAT3L);
	}
}
#endif

static unsigned long __init pplus_find_end_of_memory(void)
{
	unsigned long total;

	if (ppc_md.progress)
		ppc_md.progress("pplus_find_end_of_memory", 0);

#ifdef DUMP_DBATS
	dump_dbats();
#endif

	total = hawk_get_mem_size(PPLUS_HAWK_SMC_BASE);
	return (total);
}

static void __init pplus_map_io(void)
{
	io_block_mapping(PPLUS_ISA_IO_BASE, PPLUS_ISA_IO_BASE, 0x10000000,
			 _PAGE_IO);
	io_block_mapping(0xfef80000, 0xfef80000, 0x00080000, _PAGE_IO);
}

static void __init pplus_init2(void)
{
#ifdef CONFIG_NVRAM
	request_region(PREP_NVRAM_AS0, 0x8, "nvram");
#endif
	request_region(0x20, 0x20, "pic1");
	request_region(0xa0, 0x20, "pic2");
	request_region(0x00, 0x20, "dma1");
	request_region(0x40, 0x20, "timer");
	request_region(0x80, 0x10, "dma page reg");
	request_region(0xc0, 0x20, "dma2");
}

/*
 * Set BAT 2 to access 0x8000000 so progress messages will work and set BAT 3
 * to 0xf0000000 to access Falcon/Raven or Hawk registers
 */
static __inline__ void pplus_set_bat(void)
{
	/* wait for all outstanding memory accesses to complete */
	mb();

	/* setup DBATs */
	mtspr(SPRN_DBAT2U, 0x80001ffe);
	mtspr(SPRN_DBAT2L, 0x8000002a);
	mtspr(SPRN_DBAT3U, 0xf0001ffe);
	mtspr(SPRN_DBAT3L, 0xf000002a);

	/* wait for updates */
	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. */
	pplus_set_bat();

	isa_io_base = PREP_ISA_IO_BASE;
	isa_mem_base = PREP_ISA_MEM_BASE;
	pci_dram_offset = PREP_PCI_DRAM_OFFSET;
	ISA_DMA_THRESHOLD = 0x00ffffff;
	DMA_MODE_READ = 0x44;
	DMA_MODE_WRITE = 0x48;
	ppc_do_canonicalize_irqs = 1;

	ppc_md.setup_arch = pplus_setup_arch;
	ppc_md.show_cpuinfo = pplus_show_cpuinfo;
	ppc_md.init_IRQ = pplus_init_IRQ;
	/* this gets changed later on if we have an OpenPIC -- Cort */
	ppc_md.get_irq = i8259_irq;
	ppc_md.init = pplus_init2;

	ppc_md.restart = pplus_restart;
	ppc_md.power_off = pplus_power_off;
	ppc_md.halt = pplus_halt;

	TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
		  PREP_NVRAM_DATA, 8);

	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 = todc_calibrate_decr;
	ppc_md.nvram_read_val = todc_m48txx_read_val;
	ppc_md.nvram_write_val = todc_m48txx_write_val;

	ppc_md.find_end_of_memory = pplus_find_end_of_memory;
	ppc_md.setup_io_mappings = pplus_map_io;

#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
	ppc_ide_md.default_irq = pplus_ide_default_irq;
	ppc_ide_md.default_io_base = pplus_ide_default_io_base;
	ppc_ide_md.ide_init_hwif = pplus_ide_init_hwif_ports;
#endif

#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
#ifdef CONFIG_SMP
	smp_ops = &pplus_smp_ops;
#endif				/* CONFIG_SMP */
}