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linux/arch/ppc/syslib/ppc85xx_setup.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

355 lines
9.4 KiB
C
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/*
* arch/ppc/syslib/ppc85xx_setup.c
*
* MPC85XX common board code
*
* Maintainer: Kumar Gala <kumar.gala@freescale.com>
*
* Copyright 2004 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/config.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/serial.h>
#include <linux/tty.h> /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <asm/prom.h>
#include <asm/time.h>
#include <asm/mpc85xx.h>
#include <asm/immap_85xx.h>
#include <asm/mmu.h>
#include <asm/ppc_sys.h>
#include <asm/kgdb.h>
#include <syslib/ppc85xx_setup.h>
/* Return the amount of memory */
unsigned long __init
mpc85xx_find_end_of_memory(void)
{
bd_t *binfo;
binfo = (bd_t *) __res;
return binfo->bi_memsize;
}
/* The decrementer counts at the system (internal) clock freq divided by 8 */
void __init
mpc85xx_calibrate_decr(void)
{
bd_t *binfo = (bd_t *) __res;
unsigned int freq, divisor;
/* get the core frequency */
freq = binfo->bi_busfreq;
/* The timebase is updated every 8 bus clocks, HID0[SEL_TBCLK] = 0 */
divisor = 8;
tb_ticks_per_jiffy = freq / divisor / HZ;
tb_to_us = mulhwu_scale_factor(freq / divisor, 1000000);
/* Set the time base to zero */
mtspr(SPRN_TBWL, 0);
mtspr(SPRN_TBWU, 0);
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
/* Enable decrementer interrupt */
mtspr(SPRN_TCR, TCR_DIE);
}
#ifdef CONFIG_SERIAL_8250
void __init
mpc85xx_early_serial_map(void)
{
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
struct uart_port serial_req;
#endif
struct plat_serial8250_port *pdata;
bd_t *binfo = (bd_t *) __res;
pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(MPC85xx_DUART);
/* Setup serial port access */
pdata[0].uartclk = binfo->bi_busfreq;
pdata[0].mapbase += binfo->bi_immr_base;
pdata[0].membase = ioremap(pdata[0].mapbase, MPC85xx_UART0_SIZE);
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
memset(&serial_req, 0, sizeof (serial_req));
serial_req.iotype = SERIAL_IO_MEM;
serial_req.mapbase = pdata[0].mapbase;
serial_req.membase = pdata[0].membase;
serial_req.regshift = 0;
gen550_init(0, &serial_req);
#endif
pdata[1].uartclk = binfo->bi_busfreq;
pdata[1].mapbase += binfo->bi_immr_base;
pdata[1].membase = ioremap(pdata[1].mapbase, MPC85xx_UART0_SIZE);
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Assume gen550_init() doesn't modify serial_req */
serial_req.mapbase = pdata[1].mapbase;
serial_req.membase = pdata[1].membase;
gen550_init(1, &serial_req);
#endif
}
#endif
void
mpc85xx_restart(char *cmd)
{
local_irq_disable();
abort();
}
void
mpc85xx_power_off(void)
{
local_irq_disable();
for(;;);
}
void
mpc85xx_halt(void)
{
local_irq_disable();
for(;;);
}
#ifdef CONFIG_PCI
static void __init
mpc85xx_setup_pci1(struct pci_controller *hose)
{
volatile struct ccsr_pci *pci;
volatile struct ccsr_guts *guts;
unsigned short temps;
bd_t *binfo = (bd_t *) __res;
pci = ioremap(binfo->bi_immr_base + MPC85xx_PCI1_OFFSET,
MPC85xx_PCI1_SIZE);
guts = ioremap(binfo->bi_immr_base + MPC85xx_GUTS_OFFSET,
MPC85xx_GUTS_SIZE);
early_read_config_word(hose, 0, 0, PCI_COMMAND, &temps);
temps |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
early_write_config_word(hose, 0, 0, PCI_COMMAND, temps);
#define PORDEVSR_PCI (0x00800000) /* PCI Mode */
if (guts->pordevsr & PORDEVSR_PCI) {
early_write_config_byte(hose, 0, 0, PCI_LATENCY_TIMER, 0x80);
} else {
/* PCI-X init */
temps = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
| PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
early_write_config_word(hose, 0, 0, PCIX_COMMAND, temps);
}
/* Disable all windows (except powar0 since its ignored) */
pci->powar1 = 0;
pci->powar2 = 0;
pci->powar3 = 0;
pci->powar4 = 0;
pci->piwar1 = 0;
pci->piwar2 = 0;
pci->piwar3 = 0;
/* Setup Phys:PCI 1:1 outbound mem window @ MPC85XX_PCI1_LOWER_MEM */
pci->potar1 = (MPC85XX_PCI1_LOWER_MEM >> 12) & 0x000fffff;
pci->potear1 = 0x00000000;
pci->powbar1 = (MPC85XX_PCI1_LOWER_MEM >> 12) & 0x000fffff;
/* Enable, Mem R/W */
pci->powar1 = 0x80044000 |
(__ilog2(MPC85XX_PCI1_UPPER_MEM - MPC85XX_PCI1_LOWER_MEM + 1) - 1);
/* Setup outboud IO windows @ MPC85XX_PCI1_IO_BASE */
pci->potar2 = 0x00000000;
pci->potear2 = 0x00000000;
pci->powbar2 = (MPC85XX_PCI1_IO_BASE >> 12) & 0x000fffff;
/* Enable, IO R/W */
pci->powar2 = 0x80088000 | (__ilog2(MPC85XX_PCI1_IO_SIZE) - 1);
/* Setup 2G inbound Memory Window @ 0 */
pci->pitar1 = 0x00000000;
pci->piwbar1 = 0x00000000;
pci->piwar1 = 0xa0f5501e; /* Enable, Prefetch, Local
Mem, Snoop R/W, 2G */
}
extern int mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin);
extern int mpc85xx_exclude_device(u_char bus, u_char devfn);
#ifdef CONFIG_85xx_PCI2
static void __init
mpc85xx_setup_pci2(struct pci_controller *hose)
{
volatile struct ccsr_pci *pci;
unsigned short temps;
bd_t *binfo = (bd_t *) __res;
pci = ioremap(binfo->bi_immr_base + MPC85xx_PCI2_OFFSET,
MPC85xx_PCI2_SIZE);
early_read_config_word(hose, hose->bus_offset, 0, PCI_COMMAND, &temps);
temps |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
early_write_config_word(hose, hose->bus_offset, 0, PCI_COMMAND, temps);
early_write_config_byte(hose, hose->bus_offset, 0, PCI_LATENCY_TIMER, 0x80);
/* Disable all windows (except powar0 since its ignored) */
pci->powar1 = 0;
pci->powar2 = 0;
pci->powar3 = 0;
pci->powar4 = 0;
pci->piwar1 = 0;
pci->piwar2 = 0;
pci->piwar3 = 0;
/* Setup Phys:PCI 1:1 outbound mem window @ MPC85XX_PCI2_LOWER_MEM */
pci->potar1 = (MPC85XX_PCI2_LOWER_MEM >> 12) & 0x000fffff;
pci->potear1 = 0x00000000;
pci->powbar1 = (MPC85XX_PCI2_LOWER_MEM >> 12) & 0x000fffff;
/* Enable, Mem R/W */
pci->powar1 = 0x80044000 |
(__ilog2(MPC85XX_PCI1_UPPER_MEM - MPC85XX_PCI1_LOWER_MEM + 1) - 1);
/* Setup outboud IO windows @ MPC85XX_PCI2_IO_BASE */
pci->potar2 = 0x00000000;
pci->potear2 = 0x00000000;
pci->powbar2 = (MPC85XX_PCI2_IO_BASE >> 12) & 0x000fffff;
/* Enable, IO R/W */
pci->powar2 = 0x80088000 | (__ilog2(MPC85XX_PCI1_IO_SIZE) - 1);
/* Setup 2G inbound Memory Window @ 0 */
pci->pitar1 = 0x00000000;
pci->piwbar1 = 0x00000000;
pci->piwar1 = 0xa0f5501e; /* Enable, Prefetch, Local
Mem, Snoop R/W, 2G */
}
#endif /* CONFIG_85xx_PCI2 */
int mpc85xx_pci1_last_busno = 0;
void __init
mpc85xx_setup_hose(void)
{
struct pci_controller *hose_a;
#ifdef CONFIG_85xx_PCI2
struct pci_controller *hose_b;
#endif
bd_t *binfo = (bd_t *) __res;
hose_a = pcibios_alloc_controller();
if (!hose_a)
return;
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = mpc85xx_map_irq;
hose_a->first_busno = 0;
hose_a->bus_offset = 0;
hose_a->last_busno = 0xff;
setup_indirect_pci(hose_a, binfo->bi_immr_base + PCI1_CFG_ADDR_OFFSET,
binfo->bi_immr_base + PCI1_CFG_DATA_OFFSET);
hose_a->set_cfg_type = 1;
mpc85xx_setup_pci1(hose_a);
hose_a->pci_mem_offset = MPC85XX_PCI1_MEM_OFFSET;
hose_a->mem_space.start = MPC85XX_PCI1_LOWER_MEM;
hose_a->mem_space.end = MPC85XX_PCI1_UPPER_MEM;
hose_a->io_space.start = MPC85XX_PCI1_LOWER_IO;
hose_a->io_space.end = MPC85XX_PCI1_UPPER_IO;
hose_a->io_base_phys = MPC85XX_PCI1_IO_BASE;
#ifdef CONFIG_85xx_PCI2
isa_io_base =
(unsigned long) ioremap(MPC85XX_PCI1_IO_BASE,
MPC85XX_PCI1_IO_SIZE +
MPC85XX_PCI2_IO_SIZE);
#else
isa_io_base =
(unsigned long) ioremap(MPC85XX_PCI1_IO_BASE,
MPC85XX_PCI1_IO_SIZE);
#endif
hose_a->io_base_virt = (void *) isa_io_base;
/* setup resources */
pci_init_resource(&hose_a->mem_resources[0],
MPC85XX_PCI1_LOWER_MEM,
MPC85XX_PCI1_UPPER_MEM,
IORESOURCE_MEM, "PCI1 host bridge");
pci_init_resource(&hose_a->io_resource,
MPC85XX_PCI1_LOWER_IO,
MPC85XX_PCI1_UPPER_IO,
IORESOURCE_IO, "PCI1 host bridge");
ppc_md.pci_exclude_device = mpc85xx_exclude_device;
hose_a->last_busno = pciauto_bus_scan(hose_a, hose_a->first_busno);
#ifdef CONFIG_85xx_PCI2
hose_b = pcibios_alloc_controller();
if (!hose_b)
return;
hose_b->bus_offset = hose_a->last_busno + 1;
hose_b->first_busno = hose_a->last_busno + 1;
hose_b->last_busno = 0xff;
setup_indirect_pci(hose_b, binfo->bi_immr_base + PCI2_CFG_ADDR_OFFSET,
binfo->bi_immr_base + PCI2_CFG_DATA_OFFSET);
hose_b->set_cfg_type = 1;
mpc85xx_setup_pci2(hose_b);
hose_b->pci_mem_offset = MPC85XX_PCI2_MEM_OFFSET;
hose_b->mem_space.start = MPC85XX_PCI2_LOWER_MEM;
hose_b->mem_space.end = MPC85XX_PCI2_UPPER_MEM;
hose_b->io_space.start = MPC85XX_PCI2_LOWER_IO;
hose_b->io_space.end = MPC85XX_PCI2_UPPER_IO;
hose_b->io_base_phys = MPC85XX_PCI2_IO_BASE;
hose_b->io_base_virt = (void *) isa_io_base + MPC85XX_PCI1_IO_SIZE;
/* setup resources */
pci_init_resource(&hose_b->mem_resources[0],
MPC85XX_PCI2_LOWER_MEM,
MPC85XX_PCI2_UPPER_MEM,
IORESOURCE_MEM, "PCI2 host bridge");
pci_init_resource(&hose_b->io_resource,
MPC85XX_PCI2_LOWER_IO,
MPC85XX_PCI2_UPPER_IO,
IORESOURCE_IO, "PCI2 host bridge");
hose_b->last_busno = pciauto_bus_scan(hose_b, hose_b->first_busno);
/* let board code know what the last bus number was on PCI1 */
mpc85xx_pci1_last_busno = hose_a->last_busno;
#endif
return;
}
#endif /* CONFIG_PCI */
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