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linux/arch/ppc/platforms/mvme5100.c
Linus Torvalds 1da177e4c3 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!
2005-04-16 15:20:36 -07:00

350 lines
8.5 KiB
C
Raw Blame History

/*
* arch/ppc/platforms/mvme5100.c
*
* Board setup routines for the Motorola MVME5100.
*
* Author: Matt Porter <mporter@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/pci.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/kdev_t.h>
#include <linux/root_dev.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/open_pic.h>
#include <asm/i8259.h>
#include <asm/todc.h>
#include <asm/pci-bridge.h>
#include <asm/bootinfo.h>
#include <asm/hawk.h>
#include <platforms/pplus.h>
#include <platforms/mvme5100.h>
static u_char mvme5100_openpic_initsenses[16] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* i8259 cascade */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* TL16C550 UART 1,2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet1 front panel or P2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Hawk Watchdog 1,2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* DS1621 thermal alarm */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT0# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT1# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT2# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Universe II LINT3# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTA#, PMC2 INTB# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTB#, PMC2 INTC# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTC#, PMC2 INTD# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* PMC1 INTD#, PMC2 INTA# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Enet 2 (front panel) */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Abort Switch */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* RTC Alarm */
};
static inline int
mvme5100_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
int irq;
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{ 0, 0, 0, 0 }, /* IDSEL 11 - Winbond */
{ 0, 0, 0, 0 }, /* IDSEL 12 - unused */
{ 21, 22, 23, 24 }, /* IDSEL 13 - Universe II */
{ 18, 0, 0, 0 }, /* IDSEL 14 - Enet 1 */
{ 0, 0, 0, 0 }, /* IDSEL 15 - unused */
{ 25, 26, 27, 28 }, /* IDSEL 16 - PMC Slot 1 */
{ 28, 25, 26, 27 }, /* IDSEL 17 - PMC Slot 2 */
{ 0, 0, 0, 0 }, /* IDSEL 18 - unused */
{ 29, 0, 0, 0 }, /* IDSEL 19 - Enet 2 */
{ 0, 0, 0, 0 }, /* IDSEL 20 - PMCSPAN */
};
const long min_idsel = 11, max_idsel = 20, irqs_per_slot = 4;
irq = PCI_IRQ_TABLE_LOOKUP;
/* If lookup is zero, always return 0 */
if (!irq)
return 0;
else
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
/* If IPMC761 present, return table value */
return irq;
#else
/* If IPMC761 not present, we don't have an i8259 so adjust */
return (irq - NUM_8259_INTERRUPTS);
#endif
}
static void
mvme5100_pcibios_fixup_resources(struct pci_dev *dev)
{
int i;
if ((dev->vendor == PCI_VENDOR_ID_MOTOROLA) &&
(dev->device == PCI_DEVICE_ID_MOTOROLA_HAWK))
for (i=0; i<DEVICE_COUNT_RESOURCE; i++)
{
dev->resource[i].start = 0;
dev->resource[i].end = 0;
}
}
static void __init
mvme5100_setup_bridge(void)
{
struct pci_controller* hose;
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = MVME5100_PCI_MEM_OFFSET;
pci_init_resource(&hose->io_resource, MVME5100_PCI_LOWER_IO,
MVME5100_PCI_UPPER_IO, IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0], MVME5100_PCI_LOWER_MEM,
MVME5100_PCI_UPPER_MEM, IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = MVME5100_PCI_LOWER_IO;
hose->io_space.end = MVME5100_PCI_UPPER_IO;
hose->mem_space.start = MVME5100_PCI_LOWER_MEM;
hose->mem_space.end = MVME5100_PCI_UPPER_MEM;
hose->io_base_virt = (void *)MVME5100_ISA_IO_BASE;
/* Use indirect method of Hawk */
setup_indirect_pci(hose, MVME5100_PCI_CONFIG_ADDR,
MVME5100_PCI_CONFIG_DATA);
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pcibios_fixup_resources = mvme5100_pcibios_fixup_resources;
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = mvme5100_map_irq;
}
static void __init
mvme5100_setup_arch(void)
{
if ( ppc_md.progress )
ppc_md.progress("mvme5100_setup_arch: enter", 0);
loops_per_jiffy = 50000000 / HZ;
#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
if ( ppc_md.progress )
ppc_md.progress("mvme5100_setup_arch: find_bridges", 0);
/* Setup PCI host bridge */
mvme5100_setup_bridge();
/* Find and map our OpenPIC */
hawk_mpic_init(MVME5100_PCI_MEM_OFFSET);
OpenPIC_InitSenses = mvme5100_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof(mvme5100_openpic_initsenses);
printk("MVME5100 port (C) 2001 MontaVista Software, Inc. (source@mvista.com)\n");
if ( ppc_md.progress )
ppc_md.progress("mvme5100_setup_arch: exit", 0);
return;
}
static void __init
mvme5100_init2(void)
{
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
request_region(0x00,0x20,"dma1");
request_region(0x20,0x20,"pic1");
request_region(0x40,0x20,"timer");
request_region(0x80,0x10,"dma page reg");
request_region(0xa0,0x20,"pic2");
request_region(0xc0,0x20,"dma2");
#endif
return;
}
/*
* Interrupt setup and service.
* Have MPIC on HAWK and cascaded 8259s on Winbond cascaded to MPIC.
*/
static void __init
mvme5100_init_IRQ(void)
{
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
int i;
#endif
if ( ppc_md.progress )
ppc_md.progress("init_irq: enter", 0);
openpic_set_sources(0, 16, OpenPIC_Addr + 0x10000);
#ifdef CONFIG_MVME5100_IPMC761_PRESENT
openpic_init(NUM_8259_INTERRUPTS);
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
&i8259_irq);
/* Map i8259 interrupts. */
for (i = 0; i < NUM_8259_INTERRUPTS; i++)
irq_desc[i].handler = &i8259_pic;
i8259_init(0);
#else
openpic_init(0);
#endif
if ( ppc_md.progress )
ppc_md.progress("init_irq: exit", 0);
return;
}
/*
* Set BAT 3 to map 0xf0000000 to end of physical memory space.
*/
static __inline__ void
mvme5100_set_bat(void)
{
mb();
mtspr(SPRN_DBAT1U, 0xf0001ffe);
mtspr(SPRN_DBAT1L, 0xf000002a);
mb();
}
static unsigned long __init
mvme5100_find_end_of_memory(void)
{
return hawk_get_mem_size(MVME5100_HAWK_SMC_BASE);
}
static void __init
mvme5100_map_io(void)
{
io_block_mapping(0xfe000000, 0xfe000000, 0x02000000, _PAGE_IO);
ioremap_base = 0xfe000000;
}
static void
mvme5100_reset_board(void)
{
local_irq_disable();
/* Set exception prefix high - to the firmware */
_nmask_and_or_msr(0, MSR_IP);
out_8((u_char *)MVME5100_BOARD_MODRST_REG, 0x01);
return;
}
static void
mvme5100_restart(char *cmd)
{
volatile ulong i = 10000000;
mvme5100_reset_board();
while (i-- > 0);
panic("restart failed\n");
}
static void
mvme5100_halt(void)
{
local_irq_disable();
while (1);
}
static void
mvme5100_power_off(void)
{
mvme5100_halt();
}
static int
mvme5100_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: Motorola\n");
seq_printf(m, "machine\t\t: MVME5100\n");
return 0;
}
TODC_ALLOC();
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
mvme5100_set_bat();
isa_io_base = MVME5100_ISA_IO_BASE;
isa_mem_base = MVME5100_ISA_MEM_BASE;
pci_dram_offset = MVME5100_PCI_DRAM_OFFSET;
ppc_md.setup_arch = mvme5100_setup_arch;
ppc_md.show_cpuinfo = mvme5100_show_cpuinfo;
ppc_md.init_IRQ = mvme5100_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.init = mvme5100_init2;
ppc_md.restart = mvme5100_restart;
ppc_md.power_off = mvme5100_power_off;
ppc_md.halt = mvme5100_halt;
ppc_md.find_end_of_memory = mvme5100_find_end_of_memory;
ppc_md.setup_io_mappings = mvme5100_map_io;
TODC_INIT(TODC_TYPE_MK48T37, MVME5100_NVRAM_AS0, MVME5100_NVRAM_AS1,
MVME5100_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;
}
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