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linux-stable-rt/arch/ppc/platforms/85xx/mpc85xx_cds_common.c

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/*
* arch/ppc/platform/85xx/mpc85xx_cds_common.c
*
* MPC85xx CDS board specific routines
*
* 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/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/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/serial.h>
#include <linux/module.h>
#include <linux/root_dev.h>
#include <linux/initrd.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/fsl_devices.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/todc.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/open_pic.h>
#include <asm/i8259.h>
#include <asm/bootinfo.h>
#include <asm/pci-bridge.h>
#include <asm/mpc85xx.h>
#include <asm/irq.h>
#include <asm/immap_85xx.h>
#include <asm/cpm2.h>
#include <asm/ppc_sys.h>
#include <asm/kgdb.h>
#include <mm/mmu_decl.h>
#include <syslib/cpm2_pic.h>
#include <syslib/ppc85xx_common.h>
#include <syslib/ppc85xx_setup.h>
#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
#endif
extern unsigned long total_memory; /* in mm/init */
unsigned char __res[sizeof (bd_t)];
static int cds_pci_slot = 2;
static volatile u8 * cadmus;
/* Internal interrupts are all Level Sensitive, and Positive Polarity */
static u_char mpc85xx_cds_openpic_initsenses[] __initdata = {
MPC85XX_INTERNAL_IRQ_SENSES,
#if defined(CONFIG_PCI)
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 0: PCI1 slot */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 1: PCI1 slot */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 2: PCI1 slot */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 3: PCI1 slot */
#else
0x0, /* External 0: */
0x0, /* External 1: */
0x0, /* External 2: */
0x0, /* External 3: */
#endif
0x0, /* External 4: */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 5: PHY */
0x0, /* External 6: */
0x0, /* External 7: */
0x0, /* External 8: */
0x0, /* External 9: */
0x0, /* External 10: */
#if defined(CONFIG_85xx_PCI2) && defined(CONFIG_PCI)
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* External 11: PCI2 slot 0 */
#else
0x0, /* External 11: */
#endif
};
/* ************************************************************************ */
int
mpc85xx_cds_show_cpuinfo(struct seq_file *m)
{
uint pvid, svid, phid1;
uint memsize = total_memory;
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
/* get the core frequency */
freq = binfo->bi_intfreq;
pvid = mfspr(SPRN_PVR);
svid = mfspr(SPRN_SVR);
seq_printf(m, "Vendor\t\t: Freescale Semiconductor\n");
seq_printf(m, "Machine\t\t: CDS - MPC%s (%x)\n", cur_ppc_sys_spec->ppc_sys_name, cadmus[CM_VER]);
seq_printf(m, "clock\t\t: %dMHz\n", freq / 1000000);
seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
seq_printf(m, "SVR\t\t: 0x%x\n", svid);
/* Display cpu Pll setting */
phid1 = mfspr(SPRN_HID1);
seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
/* Display the amount of memory */
seq_printf(m, "Memory\t\t: %d MB\n", memsize / (1024 * 1024));
return 0;
}
#ifdef CONFIG_CPM2
static void cpm2_cascade(int irq, void *dev_id, struct pt_regs *regs)
{
while((irq = cpm2_get_irq(regs)) >= 0)
__do_IRQ(irq, regs);
}
static struct irqaction cpm2_irqaction = {
.handler = cpm2_cascade,
.flags = SA_INTERRUPT,
.mask = CPU_MASK_NONE,
.name = "cpm2_cascade",
};
#endif /* CONFIG_CPM2 */
void __init
mpc85xx_cds_init_IRQ(void)
{
bd_t *binfo = (bd_t *) __res;
int i;
/* Determine the Physical Address of the OpenPIC regs */
phys_addr_t OpenPIC_PAddr = binfo->bi_immr_base + MPC85xx_OPENPIC_OFFSET;
OpenPIC_Addr = ioremap(OpenPIC_PAddr, MPC85xx_OPENPIC_SIZE);
OpenPIC_InitSenses = mpc85xx_cds_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof (mpc85xx_cds_openpic_initsenses);
/* Skip reserved space and internal sources */
#ifdef CONFIG_MPC8548
openpic_set_sources(0, 48, OpenPIC_Addr + 0x10200);
#else
openpic_set_sources(0, 32, OpenPIC_Addr + 0x10200);
#endif
/* Map PIC IRQs 0-11 */
openpic_set_sources(48, 12, OpenPIC_Addr + 0x10000);
/* we let openpic interrupts starting from an offset, to
* leave space for cascading interrupts underneath.
*/
openpic_init(MPC85xx_OPENPIC_IRQ_OFFSET);
#ifdef CONFIG_PCI
openpic_hookup_cascade(PIRQ0A, "82c59 cascade", i8259_irq);
for (i = 0; i < NUM_8259_INTERRUPTS; i++)
irq_desc[i].handler = &i8259_pic;
i8259_init(0);
#endif
#ifdef CONFIG_CPM2
/* Setup CPM2 PIC */
cpm2_init_IRQ();
setup_irq(MPC85xx_IRQ_CPM, &cpm2_irqaction);
#endif
return;
}
#ifdef CONFIG_PCI
/*
* interrupt routing
*/
int
mpc85xx_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
struct pci_controller *hose = pci_bus_to_hose(dev->bus->number);
if (!hose->index)
{
/* Handle PCI1 interrupts */
char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
/* Note IRQ assignment for slots is based on which slot the elysium is
* in -- in this setup elysium is in slot #2 (this PIRQA as first
* interrupt on slot */
{
{ 0, 1, 2, 3 }, /* 16 - PMC */
{ 0, 1, 2, 3 }, /* 17 P2P (Tsi320) */
{ 0, 1, 2, 3 }, /* 18 - Slot 1 */
{ 1, 2, 3, 0 }, /* 19 - Slot 2 */
{ 2, 3, 0, 1 }, /* 20 - Slot 3 */
{ 3, 0, 1, 2 }, /* 21 - Slot 4 */
};
const long min_idsel = 16, max_idsel = 21, irqs_per_slot = 4;
int i, j;
for (i = 0; i < 6; i++)
for (j = 0; j < 4; j++)
pci_irq_table[i][j] =
((pci_irq_table[i][j] + 5 -
cds_pci_slot) & 0x3) + PIRQ0A;
return PCI_IRQ_TABLE_LOOKUP;
} else {
/* Handle PCI2 interrupts (if we have one) */
char pci_irq_table[][4] =
{
/*
* We only have one slot and one interrupt
* going to PIRQA - PIRQD */
{ PIRQ1A, PIRQ1A, PIRQ1A, PIRQ1A }, /* 21 - slot 0 */
};
const long min_idsel = 21, max_idsel = 21, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
}
#define ARCADIA_HOST_BRIDGE_IDSEL 17
#define ARCADIA_2ND_BRIDGE_IDSEL 3
extern int mpc85xx_pci1_last_busno;
int
mpc85xx_exclude_device(u_char bus, u_char devfn)
{
if (bus == 0 && PCI_SLOT(devfn) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
#ifdef CONFIG_85xx_PCI2
if (mpc85xx_pci1_last_busno)
if (bus == (mpc85xx_pci1_last_busno + 1) && PCI_SLOT(devfn) == 0)
return PCIBIOS_DEVICE_NOT_FOUND;
#endif
/* We explicitly do not go past the Tundra 320 Bridge */
if ((bus == 1) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
return PCIBIOS_DEVICE_NOT_FOUND;
if ((bus == 0) && (PCI_SLOT(devfn) == ARCADIA_2ND_BRIDGE_IDSEL))
return PCIBIOS_DEVICE_NOT_FOUND;
else
return PCIBIOS_SUCCESSFUL;
}
void __init
mpc85xx_cds_enable_via(struct pci_controller *hose)
{
u32 pci_class;
u16 vid, did;
early_read_config_dword(hose, 0, 0x88, PCI_CLASS_REVISION, &pci_class);
if ((pci_class >> 16) != PCI_CLASS_BRIDGE_PCI)
return;
/* Configure P2P so that we can reach bus 1 */
early_write_config_byte(hose, 0, 0x88, PCI_PRIMARY_BUS, 0);
early_write_config_byte(hose, 0, 0x88, PCI_SECONDARY_BUS, 1);
early_write_config_byte(hose, 0, 0x88, PCI_SUBORDINATE_BUS, 0xff);
early_read_config_word(hose, 1, 0x10, PCI_VENDOR_ID, &vid);
early_read_config_word(hose, 1, 0x10, PCI_DEVICE_ID, &did);
if ((vid != PCI_VENDOR_ID_VIA) ||
(did != PCI_DEVICE_ID_VIA_82C686))
return;
/* Enable USB and IDE functions */
early_write_config_byte(hose, 1, 0x10, 0x48, 0x08);
}
void __init
mpc85xx_cds_fixup_via(struct pci_controller *hose)
{
u32 pci_class;
u16 vid, did;
early_read_config_dword(hose, 0, 0x88, PCI_CLASS_REVISION, &pci_class);
if ((pci_class >> 16) != PCI_CLASS_BRIDGE_PCI)
return;
/*
* Force the backplane P2P bridge to have a window
* open from 0x00000000-0x00001fff in PCI I/O space.
* This allows legacy I/O (i8259, etc) on the VIA
* southbridge to be accessed.
*/
early_write_config_byte(hose, 0, 0x88, PCI_IO_BASE, 0x00);
early_write_config_word(hose, 0, 0x88, PCI_IO_BASE_UPPER16, 0x0000);
early_write_config_byte(hose, 0, 0x88, PCI_IO_LIMIT, 0x10);
early_write_config_word(hose, 0, 0x88, PCI_IO_LIMIT_UPPER16, 0x0000);
early_read_config_word(hose, 1, 0x10, PCI_VENDOR_ID, &vid);
early_read_config_word(hose, 1, 0x10, PCI_DEVICE_ID, &did);
if ((vid != PCI_VENDOR_ID_VIA) ||
(did != PCI_DEVICE_ID_VIA_82C686))
return;
/*
* Since the P2P window was forced to cover the fixed
* legacy I/O addresses, it is necessary to manually
* place the base addresses for the IDE and USB functions
* within this window.
*/
/* Function 1, IDE */
early_write_config_dword(hose, 1, 0x11, PCI_BASE_ADDRESS_0, 0x1ff8);
early_write_config_dword(hose, 1, 0x11, PCI_BASE_ADDRESS_1, 0x1ff4);
early_write_config_dword(hose, 1, 0x11, PCI_BASE_ADDRESS_2, 0x1fe8);
early_write_config_dword(hose, 1, 0x11, PCI_BASE_ADDRESS_3, 0x1fe4);
early_write_config_dword(hose, 1, 0x11, PCI_BASE_ADDRESS_4, 0x1fd0);
/* Function 2, USB ports 0-1 */
early_write_config_dword(hose, 1, 0x12, PCI_BASE_ADDRESS_4, 0x1fa0);
/* Function 3, USB ports 2-3 */
early_write_config_dword(hose, 1, 0x13, PCI_BASE_ADDRESS_4, 0x1f80);
/* Function 5, Power Management */
early_write_config_dword(hose, 1, 0x15, PCI_BASE_ADDRESS_0, 0x1e00);
early_write_config_dword(hose, 1, 0x15, PCI_BASE_ADDRESS_1, 0x1dfc);
early_write_config_dword(hose, 1, 0x15, PCI_BASE_ADDRESS_2, 0x1df8);
/* Function 6, AC97 Interface */
early_write_config_dword(hose, 1, 0x16, PCI_BASE_ADDRESS_0, 0x1c00);
}
void __init
mpc85xx_cds_pcibios_fixup(void)
{
struct pci_dev *dev = NULL;
u_char c;
if ((dev = pci_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_1, NULL))) {
/*
* U-Boot does not set the enable bits
* for the IDE device. Force them on here.
*/
pci_read_config_byte(dev, 0x40, &c);
c |= 0x03; /* IDE: Chip Enable Bits */
pci_write_config_byte(dev, 0x40, c);
/*
* Since only primary interface works, force the
* IDE function to standard primary IDE interrupt
* w/ 8259 offset
*/
dev->irq = 14;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}
/*
* Force legacy USB interrupt routing
*/
if ((dev = pci_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_2, NULL))) {
dev->irq = 10;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 10);
}
if ((dev = pci_find_device(PCI_VENDOR_ID_VIA,
PCI_DEVICE_ID_VIA_82C586_2, dev))) {
dev->irq = 11;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 11);
}
}
#endif /* CONFIG_PCI */
TODC_ALLOC();
/* ************************************************************************
*
* Setup the architecture
*
*/
static void __init
mpc85xx_cds_setup_arch(void)
{
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
struct gianfar_platform_data *pdata;
/* get the core frequency */
freq = binfo->bi_intfreq;
printk("mpc85xx_cds_setup_arch\n");
#ifdef CONFIG_CPM2
cpm2_reset();
#endif
cadmus = ioremap(CADMUS_BASE, CADMUS_SIZE);
cds_pci_slot = ((cadmus[CM_CSR] >> 6) & 0x3) + 1;
printk("CDS Version = %x in PCI slot %d\n", cadmus[CM_VER], cds_pci_slot);
/* Setup TODC access */
TODC_INIT(TODC_TYPE_DS1743,
0,
0,
ioremap(CDS_RTC_ADDR, CDS_RTC_SIZE),
8);
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
loops_per_jiffy = freq / HZ;
#ifdef CONFIG_PCI
/* VIA IDE configuration */
ppc_md.pcibios_fixup = mpc85xx_cds_pcibios_fixup;
/* setup PCI host bridges */
mpc85xx_setup_hose();
#endif
#ifdef CONFIG_SERIAL_8250
mpc85xx_early_serial_map();
#endif
#ifdef CONFIG_SERIAL_TEXT_DEBUG
/* Invalidate the entry we stole earlier the serial ports
* should be properly mapped */
invalidate_tlbcam_entry(num_tlbcam_entries - 1);
#endif
/* setup the board related information for the enet controllers */
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC1);
if (pdata) {
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 0;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
}
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_TSEC2);
if (pdata) {
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 1;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
}
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_eTSEC1);
if (pdata) {
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 0;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
}
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC85xx_eTSEC2);
if (pdata) {
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC85xx_IRQ_EXT5;
pdata->phyid = 1;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
}
ppc_sys_device_remove(MPC85xx_eTSEC3);
ppc_sys_device_remove(MPC85xx_eTSEC4);
#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
}
/* ************************************************************************ */
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
/* parse_bootinfo must always be called first */
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3) {
memcpy((void *) __res, (void *) (r3 + KERNELBASE),
sizeof (bd_t));
}
#ifdef CONFIG_SERIAL_TEXT_DEBUG
{
bd_t *binfo = (bd_t *) __res;
struct uart_port p;
/* Use the last TLB entry to map CCSRBAR to allow access to DUART regs */
settlbcam(num_tlbcam_entries - 1, binfo->bi_immr_base,
binfo->bi_immr_base, MPC85xx_CCSRBAR_SIZE, _PAGE_IO, 0);
memset(&p, 0, sizeof (p));
p.iotype = SERIAL_IO_MEM;
p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART0_OFFSET;
p.uartclk = binfo->bi_busfreq;
gen550_init(0, &p);
memset(&p, 0, sizeof (p));
p.iotype = SERIAL_IO_MEM;
p.membase = (void *) binfo->bi_immr_base + MPC85xx_UART1_OFFSET;
p.uartclk = binfo->bi_busfreq;
gen550_init(1, &p);
}
#endif
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured in, and there's a valid
* starting address for it, set it up.
*/
if (r4) {
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* Copy the kernel command line arguments to a safe place. */
if (r6) {
*(char *) (r7 + KERNELBASE) = 0;
strcpy(cmd_line, (char *) (r6 + KERNELBASE));
}
identify_ppc_sys_by_id(mfspr(SPRN_SVR));
/* setup the PowerPC module struct */
ppc_md.setup_arch = mpc85xx_cds_setup_arch;
ppc_md.show_cpuinfo = mpc85xx_cds_show_cpuinfo;
ppc_md.init_IRQ = mpc85xx_cds_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.restart = mpc85xx_restart;
ppc_md.power_off = mpc85xx_power_off;
ppc_md.halt = mpc85xx_halt;
ppc_md.find_end_of_memory = mpc85xx_find_end_of_memory;
ppc_md.calibrate_decr = mpc85xx_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;
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
ppc_md.progress = gen550_progress;
#endif /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
ppc_md.early_serial_map = mpc85xx_early_serial_map;
#endif /* CONFIG_SERIAL_8250 && CONFIG_KGDB */
if (ppc_md.progress)
ppc_md.progress("mpc85xx_cds_init(): exit", 0);
return;
}
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