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android_kernel_xiaomi_sm8350/arch/ppc/platforms/4xx/ebony.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

357 lines
9.0 KiB
C
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/*
* arch/ppc/platforms/4xx/ebony.c
*
* Ebony board specific routines
*
* Matt Porter <mporter@kernel.crashing.org>
* Copyright 2002-2005 MontaVista Software Inc.
*
* Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
* Copyright (c) 2003, 2004 Zultys Technologies
*
* 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/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/types.h>
#include <linux/major.h>
#include <linux/blkdev.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <linux/initrd.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.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/ocp.h>
#include <asm/pci-bridge.h>
#include <asm/time.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/ppc4xx_pic.h>
#include <asm/ppcboot.h>
#include <syslib/gen550.h>
#include <syslib/ibm440gp_common.h>
/*
* This is a horrible kludge, we eventually need to abstract this
* generic PHY stuff, so the standard phy mode defines can be
* easily used from arch code.
*/
#include "../../../../drivers/net/ibm_emac/ibm_emac_phy.h"
bd_t __res;
static struct ibm44x_clocks clocks __initdata;
/*
* Ebony external IRQ triggering/polarity settings
*/
unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ0: PCI slot 0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ1: PCI slot 1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ2: PCI slot 2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ3: PCI slot 3 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ4: IRDA */
(IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* IRQ5: SMI pushbutton */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ6: PHYs */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ7: AUX */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ8: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ9: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ10: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ11: EXT */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ12: EXT */
};
static void __init
ebony_calibrate_decr(void)
{
unsigned int freq;
/*
* Determine system clock speed
*
* If we are on Rev. B silicon, then use
* default external system clock. If we are
* on Rev. C silicon then errata forces us to
* use the internal clock.
*/
switch (PVR_REV(mfspr(SPRN_PVR))) {
case PVR_REV(PVR_440GP_RB):
freq = EBONY_440GP_RB_SYSCLK;
break;
case PVR_REV(PVR_440GP_RC1):
default:
freq = EBONY_440GP_RC_SYSCLK;
break;
}
ibm44x_calibrate_decr(freq);
}
static int
ebony_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: IBM\n");
seq_printf(m, "machine\t\t: Ebony\n");
return 0;
}
static inline int
ebony_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
*/
{
{ 23, 23, 23, 23 }, /* IDSEL 1 - PCI Slot 0 */
{ 24, 24, 24, 24 }, /* IDSEL 2 - PCI Slot 1 */
{ 25, 25, 25, 25 }, /* IDSEL 3 - PCI Slot 2 */
{ 26, 26, 26, 26 }, /* IDSEL 4 - PCI Slot 3 */
};
const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
#define PCIX_WRITEL(value, offset) \
(writel(value, pcix_reg_base + offset))
/*
* FIXME: This is only here to "make it work". This will move
* to a ibm_pcix.c which will contain a generic IBM PCIX bridge
* configuration library. -Matt
*/
static void __init
ebony_setup_pcix(void)
{
void *pcix_reg_base;
pcix_reg_base = ioremap64(PCIX0_REG_BASE, PCIX_REG_SIZE);
/* Disable all windows */
PCIX_WRITEL(0, PCIX0_POM0SA);
PCIX_WRITEL(0, PCIX0_POM1SA);
PCIX_WRITEL(0, PCIX0_POM2SA);
PCIX_WRITEL(0, PCIX0_PIM0SA);
PCIX_WRITEL(0, PCIX0_PIM1SA);
PCIX_WRITEL(0, PCIX0_PIM2SA);
/* Setup 2GB PLB->PCI outbound mem window (3_8000_0000->0_8000_0000) */
PCIX_WRITEL(0x00000003, PCIX0_POM0LAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0LAL);
PCIX_WRITEL(0x00000000, PCIX0_POM0PCIAH);
PCIX_WRITEL(0x80000000, PCIX0_POM0PCIAL);
PCIX_WRITEL(0x80000001, PCIX0_POM0SA);
/* Setup 2GB PCI->PLB inbound memory window at 0, enable MSIs */
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAH);
PCIX_WRITEL(0x00000000, PCIX0_PIM0LAL);
PCIX_WRITEL(0x80000007, PCIX0_PIM0SA);
eieio();
}
static void __init
ebony_setup_hose(void)
{
struct pci_controller *hose;
/* Configure windows on the PCI-X host bridge */
ebony_setup_pcix();
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
hose->pci_mem_offset = EBONY_PCI_MEM_OFFSET;
pci_init_resource(&hose->io_resource,
EBONY_PCI_LOWER_IO,
EBONY_PCI_UPPER_IO,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
EBONY_PCI_LOWER_MEM,
EBONY_PCI_UPPER_MEM,
IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = EBONY_PCI_LOWER_IO;
hose->io_space.end = EBONY_PCI_UPPER_IO;
hose->mem_space.start = EBONY_PCI_LOWER_MEM;
hose->mem_space.end = EBONY_PCI_UPPER_MEM;
isa_io_base =
(unsigned long)ioremap64(EBONY_PCI_IO_BASE, EBONY_PCI_IO_SIZE);
hose->io_base_virt = (void *)isa_io_base;
setup_indirect_pci(hose,
EBONY_PCI_CFGA_PLB32,
EBONY_PCI_CFGD_PLB32);
hose->set_cfg_type = 1;
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = ebony_map_irq;
}
TODC_ALLOC();
static void __init
ebony_early_serial_map(void)
{
struct uart_port port;
/* Setup ioremapped serial port access */
memset(&port, 0, sizeof(port));
port.membase = ioremap64(PPC440GP_UART0_ADDR, 8);
port.irq = 0;
port.uartclk = clocks.uart0;
port.regshift = 0;
port.iotype = SERIAL_IO_MEM;
port.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST;
port.line = 0;
if (early_serial_setup(&port) != 0) {
printk("Early serial init of port 0 failed\n");
}
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(0, &port);
#endif
port.membase = ioremap64(PPC440GP_UART1_ADDR, 8);
port.irq = 1;
port.uartclk = clocks.uart1;
port.line = 1;
if (early_serial_setup(&port) != 0) {
printk("Early serial init of port 1 failed\n");
}
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
/* Configure debug serial access */
gen550_init(1, &port);
#endif
}
static void __init
ebony_setup_arch(void)
{
struct ocp_def *def;
struct ocp_func_emac_data *emacdata;
/* Set mac_addr for each EMAC */
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 0);
emacdata = def->additions;
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_RMII;
memcpy(emacdata->mac_addr, __res.bi_enetaddr, 6);
def = ocp_get_one_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, 1);
emacdata = def->additions;
emacdata->phy_map = 0x00000001; /* Skip 0x00 */
emacdata->phy_mode = PHY_MODE_RMII;
memcpy(emacdata->mac_addr, __res.bi_enet1addr, 6);
/*
* Determine various clocks.
* To be completely correct we should get SysClk
* from FPGA, because it can be changed by on-board switches
* --ebs
*/
ibm440gp_get_clocks(&clocks, 33333333, 6 * 1843200);
ocp_sys_info.opb_bus_freq = clocks.opb;
/* Setup TODC access */
TODC_INIT(TODC_TYPE_DS1743,
0,
0,
ioremap64(EBONY_RTC_ADDR, EBONY_RTC_SIZE),
8);
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000/HZ;
/* Setup PCI host bridge */
ebony_setup_hose();
#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_HDA1;
#endif
ebony_early_serial_map();
/* Identify the system */
printk("IBM Ebony port (MontaVista Software, Inc. (source@mvista.com))\n");
}
void __init platform_init(unsigned long r3, unsigned long r4,
unsigned long r5, unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3)
__res = *(bd_t *)(r3 + KERNELBASE);
ibm44x_platform_init();
ppc_md.setup_arch = ebony_setup_arch;
ppc_md.show_cpuinfo = ebony_show_cpuinfo;
ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
ppc_md.calibrate_decr = ebony_calibrate_decr;
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.nvram_read_val = todc_direct_read_val;
ppc_md.nvram_write_val = todc_direct_write_val;
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = ebony_early_serial_map;
#endif
}
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