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android_kernel_xiaomi_sm8350/arch/ppc/syslib/ppc85xx_setup.c
Kumar Gala 127384524b [PATCH] ppc32: Fix typo in setup of 2nd PCI bus on 85xx 
Typo bug that was using PCI1 defines instead of PCI2 when setting up the
second PCI bus controller on 85xx based systems.  This hasn't been a real
issue since currently the PCI2 sizes are the same as the PCI1 sizes for
currently supported boards.

Thanks to Andrew Klossner @ Xerox for point this out.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27 16:25:56 -07:00

370 lines
9.9 KiB
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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/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>
extern void abort(void);
/* 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
#if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
extern void mpc85xx_cds_enable_via(struct pci_controller *hose);
extern void mpc85xx_cds_fixup_via(struct pci_controller *hose);
#endif
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_PCI2_UPPER_MEM - MPC85XX_PCI2_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_PCI2_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
hose_a->io_base_virt = ioremap(MPC85XX_PCI1_IO_BASE,
MPC85XX_PCI1_IO_SIZE +
MPC85XX_PCI2_IO_SIZE);
#else
hose_a->io_base_virt = ioremap(MPC85XX_PCI1_IO_BASE,
MPC85XX_PCI1_IO_SIZE);
#endif
isa_io_base = (unsigned long)hose_a->io_base_virt;
/* 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;
#if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
/* Pre pciauto_bus_scan VIA init */
mpc85xx_cds_enable_via(hose_a);
#endif
hose_a->last_busno = pciauto_bus_scan(hose_a, hose_a->first_busno);
#if defined(CONFIG_MPC8555_CDS) || defined(CONFIG_MPC8548_CDS)
/* Post pciauto_bus_scan VIA fixup */
mpc85xx_cds_fixup_via(hose_a);
#endif
#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 = hose_a->io_base_virt + 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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