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kernel-ark/arch/ppc/platforms/mcpn765.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

528 lines
13 KiB
C
Raw Blame History

/*
* arch/ppc/platforms/mcpn765.c
*
* Board setup routines for the Motorola MCG MCPN765 cPCI Board.
*
* Author: Mark A. Greer
* mgreer@mvista.com
*
* Modified by Randy Vinson (rvinson@mvista.com)
*
* 2001-2002 (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.
*/
/*
* This file adds support for the Motorola MCG MCPN765.
*/
#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/major.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h> /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/slab.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/time.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/smp.h>
#include <asm/open_pic.h>
#include <asm/i8259.h>
#include <asm/todc.h>
#include <asm/pci-bridge.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include <asm/bootinfo.h>
#include <asm/hawk.h>
#include <asm/kgdb.h>
#include "mcpn765.h"
static u_char mcpn765_openpic_initsenses[] __initdata = {
(IRQ_SENSE_EDGE | IRQ_POLARITY_POSITIVE),/* 16: i8259 cascade */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 17: COM1,2,3,4 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 18: Enet 1 (front) */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 19: HAWK WDT XXXX */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 20: 21554 bridge */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 21: cPCI INTA# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 22: cPCI INTB# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 23: cPCI INTC# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 24: cPCI INTD# */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 25: PMC1 INTA#,PMC2 INTB#*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 26: PMC1 INTB#,PMC2 INTC#*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 27: PMC1 INTC#,PMC2 INTD#*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 28: PMC1 INTD#,PMC2 INTA#*/
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 29: Enet 2 (J3) */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 30: Abort Switch */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE),/* 31: RTC Alarm */
};
extern void mcpn765_set_VIA_IDE_native(void);
extern u_int openpic_irq(void);
extern char cmd_line[];
extern void gen550_progress(char *, unsigned short);
extern void gen550_init(int, struct uart_port *);
int use_of_interrupt_tree = 0;
static void mcpn765_halt(void);
TODC_ALLOC();
/*
* Motorola MCG MCPN765 interrupt routing.
*/
static inline int
mcpn765_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
*/
{
{ 14, 0, 0, 0 }, /* IDSEL 11 - have to manually set */
{ 0, 0, 0, 0 }, /* IDSEL 12 - unused */
{ 0, 0, 0, 0 }, /* IDSEL 13 - unused */
{ 18, 0, 0, 0 }, /* IDSEL 14 - Enet 0 */
{ 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 - PMC 2B Connector XXXX */
{ 29, 0, 0, 0 }, /* IDSEL 19 - Enet 1 */
{ 20, 0, 0, 0 }, /* IDSEL 20 - 21554 cPCI bridge */
};
const long min_idsel = 11, max_idsel = 20, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
void __init
mcpn765_set_VIA_IDE_legacy(void)
{
unsigned short vend, dev;
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_VENDOR_ID, &vend);
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_DEVICE_ID, &dev);
if ((vend == PCI_VENDOR_ID_VIA) &&
(dev == PCI_DEVICE_ID_VIA_82C586_1)) {
unsigned char temp;
/* put back original "standard" port base addresses */
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_0, 0x1f1);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_1, 0x3f5);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_2, 0x171);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_3, 0x375);
early_write_config_dword(0, 0, PCI_DEVFN(0xb, 1),
PCI_BASE_ADDRESS_4, 0xcc01);
/* put into legacy mode */
early_read_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
&temp);
temp &= ~0x05;
early_write_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
temp);
}
}
void
mcpn765_set_VIA_IDE_native(void)
{
unsigned short vend, dev;
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_VENDOR_ID, &vend);
early_read_config_word(0, 0, PCI_DEVFN(0xb, 1), PCI_DEVICE_ID, &dev);
if ((vend == PCI_VENDOR_ID_VIA) &&
(dev == PCI_DEVICE_ID_VIA_82C586_1)) {
unsigned char temp;
/* put into native mode */
early_read_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
&temp);
temp |= 0x05;
early_write_config_byte(0, 0, PCI_DEVFN(0xb, 1), PCI_CLASS_PROG,
temp);
}
}
/*
* Initialize the VIA 82c586b.
*/
static void __init
mcpn765_setup_via_82c586b(void)
{
struct pci_dev *dev;
u_char c;
if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_0,
NULL)) == NULL) {
printk("No VIA ISA bridge found\n");
mcpn765_halt();
/* NOTREACHED */
}
/*
* If the firmware left the EISA 4d0/4d1 ports enabled, make sure
* IRQ 14 is set for edge.
*/
pci_read_config_byte(dev, 0x47, &c);
if (c & (1<<5)) {
c = inb(0x4d1);
c &= ~(1<<6);
outb(c, 0x4d1);
}
/* Disable PNP IRQ routing since we use the Hawk's MPIC */
pci_write_config_dword(dev, 0x54, 0);
pci_write_config_byte(dev, 0x58, 0);
pci_dev_put(dev);
if ((dev = pci_get_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_1,
NULL)) == NULL) {
printk("No VIA ISA bridge found\n");
mcpn765_halt();
/* NOTREACHED */
}
/*
* PPCBug doesn't set the enable bits for the IDE device.
* Turn them on now.
*/
pci_read_config_byte(dev, 0x40, &c);
c |= 0x03;
pci_write_config_byte(dev, 0x40, c);
pci_dev_put(dev);
return;
}
void __init
mcpn765_pcibios_fixup(void)
{
/* Do MCPN765 board specific initialization. */
mcpn765_setup_via_82c586b();
}
void __init
mcpn765_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 = MCPN765_PCI_PHY_MEM_OFFSET;
pci_init_resource(&hose->io_resource,
MCPN765_PCI_IO_START,
MCPN765_PCI_IO_END,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
MCPN765_PCI_MEM_START,
MCPN765_PCI_MEM_END,
IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = MCPN765_PCI_IO_START;
hose->io_space.end = MCPN765_PCI_IO_END;
hose->mem_space.start = MCPN765_PCI_MEM_START;
hose->mem_space.end = MCPN765_PCI_MEM_END - HAWK_MPIC_SIZE;
if (hawk_init(hose,
MCPN765_HAWK_PPC_REG_BASE,
MCPN765_PROC_PCI_MEM_START,
MCPN765_PROC_PCI_MEM_END - HAWK_MPIC_SIZE,
MCPN765_PROC_PCI_IO_START,
MCPN765_PROC_PCI_IO_END,
MCPN765_PCI_MEM_END - HAWK_MPIC_SIZE + 1) != 0) {
printk("Could not initialize HAWK bridge\n");
}
/* VIA IDE BAR decoders are only 16-bits wide. PCI Auto Config
* will reassign the bars outside of 16-bit I/O space, which will
* "break" things. To prevent this, we'll set the IDE chip into
* legacy mode and seed the bars with their legacy addresses (in 16-bit
* I/O space). The Auto Config code will skip the IDE contoller in
* legacy mode, so our bar values will stick.
*/
mcpn765_set_VIA_IDE_legacy();
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
/* Now that we've got 16-bit addresses in the bars, we can switch the
* IDE controller back into native mode so we can do "modern" resource
* and interrupt management.
*/
mcpn765_set_VIA_IDE_native();
ppc_md.pcibios_fixup = mcpn765_pcibios_fixup;
ppc_md.pcibios_fixup_bus = NULL;
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = mcpn765_map_irq;
return;
}
static void __init
mcpn765_setup_arch(void)
{
struct pci_controller *hose;
if ( ppc_md.progress )
ppc_md.progress("mcpn765_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("mcpn765_setup_arch: find_bridges", 0);
/* Lookup PCI host bridges */
mcpn765_find_bridges();
hose = pci_bus_to_hose(0);
isa_io_base = (ulong)hose->io_base_virt;
TODC_INIT(TODC_TYPE_MK48T37,
(MCPN765_PHYS_NVRAM_AS0 - isa_io_base),
(MCPN765_PHYS_NVRAM_AS1 - isa_io_base),
(MCPN765_PHYS_NVRAM_DATA - isa_io_base),
8);
OpenPIC_InitSenses = mcpn765_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof(mcpn765_openpic_initsenses);
printk("Motorola MCG MCPN765 cPCI Non-System Board\n");
printk("MCPN765 port (MontaVista Software, Inc. (source@mvista.com))\n");
if ( ppc_md.progress )
ppc_md.progress("mcpn765_setup_arch: exit", 0);
return;
}
static void __init
mcpn765_init2(void)
{
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");
return;
}
/*
* Interrupt setup and service.
* Have MPIC on HAWK and cascaded 8259s on VIA 82586 cascaded to MPIC.
*/
static void __init
mcpn765_init_IRQ(void)
{
int i;
if ( ppc_md.progress )
ppc_md.progress("init_irq: enter", 0);
openpic_init(NUM_8259_INTERRUPTS);
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
i8259_irq);
for(i=0; i < NUM_8259_INTERRUPTS; i++)
irq_desc[i].handler = &i8259_pic;
i8259_init(0);
if ( ppc_md.progress )
ppc_md.progress("init_irq: exit", 0);
return;
}
static u32
mcpn765_irq_canonicalize(u32 irq)
{
if (irq == 2)
return 9;
else
return irq;
}
static unsigned long __init
mcpn765_find_end_of_memory(void)
{
return hawk_get_mem_size(MCPN765_HAWK_SMC_BASE);
}
static void __init
mcpn765_map_io(void)
{
io_block_mapping(0xfe800000, 0xfe800000, 0x00800000, _PAGE_IO);
}
static void
mcpn765_reset_board(void)
{
local_irq_disable();
/* set VIA IDE controller into native mode */
mcpn765_set_VIA_IDE_native();
/* Set exception prefix high - to the firmware */
_nmask_and_or_msr(0, MSR_IP);
out_8((u_char *)MCPN765_BOARD_MODRST_REG, 0x01);
return;
}
static void
mcpn765_restart(char *cmd)
{
volatile ulong i = 10000000;
mcpn765_reset_board();
while (i-- > 0);
panic("restart failed\n");
}
static void
mcpn765_power_off(void)
{
mcpn765_halt();
/* NOTREACHED */
}
static void
mcpn765_halt(void)
{
local_irq_disable();
while (1);
/* NOTREACHED */
}
static int
mcpn765_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: Motorola MCG\n");
seq_printf(m, "machine\t\t: MCPN765\n");
return 0;
}
/*
* Set BAT 3 to map 0xf0000000 to end of physical memory space.
*/
static __inline__ void
mcpn765_set_bat(void)
{
mb();
mtspr(SPRN_DBAT1U, 0xfe8000fe);
mtspr(SPRN_DBAT1L, 0xfe80002a);
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. */
mcpn765_set_bat();
isa_mem_base = MCPN765_ISA_MEM_BASE;
pci_dram_offset = MCPN765_PCI_DRAM_OFFSET;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
ppc_md.setup_arch = mcpn765_setup_arch;
ppc_md.show_cpuinfo = mcpn765_show_cpuinfo;
ppc_md.irq_canonicalize = mcpn765_irq_canonicalize;
ppc_md.init_IRQ = mcpn765_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.init = mcpn765_init2;
ppc_md.restart = mcpn765_restart;
ppc_md.power_off = mcpn765_power_off;
ppc_md.halt = mcpn765_halt;
ppc_md.find_end_of_memory = mcpn765_find_end_of_memory;
ppc_md.setup_io_mappings = mcpn765_map_io;
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.heartbeat = NULL;
ppc_md.heartbeat_reset = 0;
ppc_md.heartbeat_count = 0;
#ifdef CONFIG_SERIAL_TEXT_DEBUG
ppc_md.progress = gen550_progress;
#endif
#ifdef CONFIG_KGDB
ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
#endif
return;
}
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