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linux/arch/ppc/platforms/lopec.c
Alon Bar-Lev bf71cecbe4 [PATCH] Dynamic kernel command-line: ppc 
Rename saved_command_line into boot_command_line.

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-12 09:48:39 -08:00

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/*
* Setup routines for the Motorola LoPEC.
*
* Author: Dan Cox
* Maintainer: Tom Rini <trini@kernel.crashing.org>
*
* 2001-2004 (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.
*/
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/pci_ids.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/initrd.h>
#include <linux/console.h>
#include <linux/root_dev.h>
#include <linux/pci.h>
#include <asm/machdep.h>
#include <asm/pci-bridge.h>
#include <asm/io.h>
#include <asm/open_pic.h>
#include <asm/i8259.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/mpc10x.h>
#include <asm/hw_irq.h>
#include <asm/prep_nvram.h>
#include <asm/kgdb.h>
/*
* Define all of the IRQ senses and polarities. Taken from the
* LoPEC Programmer's Reference Guide.
*/
static u_char lopec_openpic_initsenses[16] __initdata = {
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ 0 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 1 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ 2 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 3 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ 4 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ 5 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 6 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 7 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 8 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 9 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 10 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 11 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* IRQ 12 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_POSITIVE), /* IRQ 13 */
(IRQ_SENSE_EDGE | IRQ_POLARITY_NEGATIVE), /* IRQ 14 */
(IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE) /* IRQ 15 */
};
static inline int __init
lopec_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
int irq;
static char pci_irq_table[][4] = {
{16, 0, 0, 0}, /* ID 11 - Winbond */
{22, 0, 0, 0}, /* ID 12 - SCSI */
{0, 0, 0, 0}, /* ID 13 - nothing */
{17, 0, 0, 0}, /* ID 14 - 82559 Ethernet */
{27, 0, 0, 0}, /* ID 15 - USB */
{23, 0, 0, 0}, /* ID 16 - PMC slot 1 */
{24, 0, 0, 0}, /* ID 17 - PMC slot 2 */
{25, 0, 0, 0}, /* ID 18 - PCI slot */
{0, 0, 0, 0}, /* ID 19 - nothing */
{0, 0, 0, 0}, /* ID 20 - nothing */
{0, 0, 0, 0}, /* ID 21 - nothing */
{0, 0, 0, 0}, /* ID 22 - nothing */
{0, 0, 0, 0}, /* ID 23 - nothing */
{0, 0, 0, 0}, /* ID 24 - PMC slot 1b */
{0, 0, 0, 0}, /* ID 25 - nothing */
{0, 0, 0, 0} /* ID 26 - PMC Slot 2b */
};
const long min_idsel = 11, max_idsel = 26, irqs_per_slot = 4;
irq = PCI_IRQ_TABLE_LOOKUP;
if (!irq)
return 0;
return irq;
}
static void __init
lopec_setup_winbond_83553(struct pci_controller *hose)
{
int devfn;
devfn = PCI_DEVFN(11,0);
/* IDE interrupt routing (primary 14, secondary 15) */
early_write_config_byte(hose, 0, devfn, 0x43, 0xef);
/* PCI interrupt routing */
early_write_config_word(hose, 0, devfn, 0x44, 0x0000);
/* ISA-PCI address decoder */
early_write_config_byte(hose, 0, devfn, 0x48, 0xf0);
/* RTC, kb, not used in PPC */
early_write_config_byte(hose, 0, devfn, 0x4d, 0x00);
early_write_config_byte(hose, 0, devfn, 0x4e, 0x04);
devfn = PCI_DEVFN(11, 1);
early_write_config_byte(hose, 0, devfn, 0x09, 0x8f);
early_write_config_dword(hose, 0, devfn, 0x40, 0x00ff0011);
}
static void __init
lopec_find_bridges(void)
{
struct pci_controller *hose;
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
if (mpc10x_bridge_init(hose, MPC10X_MEM_MAP_B, MPC10X_MEM_MAP_B,
MPC10X_MAPB_EUMB_BASE) == 0) {
hose->mem_resources[0].end = 0xffffffff;
lopec_setup_winbond_83553(hose);
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = lopec_map_irq;
}
}
static int
lopec_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "machine\t\t: Motorola LoPEC\n");
return 0;
}
static void
lopec_restart(char *cmd)
{
#define LOPEC_SYSSTAT1 0xffe00000
/* force a hard reset, if possible */
unsigned char reg = *((unsigned char *) LOPEC_SYSSTAT1);
reg |= 0x80;
*((unsigned char *) LOPEC_SYSSTAT1) = reg;
local_irq_disable();
while(1);
#undef LOPEC_SYSSTAT1
}
static void
lopec_halt(void)
{
local_irq_disable();
while(1);
}
static void
lopec_power_off(void)
{
lopec_halt();
}
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
int lopec_ide_ports_known = 0;
static unsigned long lopec_ide_regbase[MAX_HWIFS];
static unsigned long lopec_ide_ctl_regbase[MAX_HWIFS];
static unsigned long lopec_idedma_regbase;
static void
lopec_ide_probe(void)
{
struct pci_dev *dev = pci_get_device(PCI_VENDOR_ID_WINBOND,
PCI_DEVICE_ID_WINBOND_82C105,
NULL);
lopec_ide_ports_known = 1;
if (dev) {
lopec_ide_regbase[0] = dev->resource[0].start;
lopec_ide_regbase[1] = dev->resource[2].start;
lopec_ide_ctl_regbase[0] = dev->resource[1].start;
lopec_ide_ctl_regbase[1] = dev->resource[3].start;
lopec_idedma_regbase = dev->resource[4].start;
pci_dev_put(dev);
}
}
static int
lopec_ide_default_irq(unsigned long base)
{
if (lopec_ide_ports_known == 0)
lopec_ide_probe();
if (base == lopec_ide_regbase[0])
return 14;
else if (base == lopec_ide_regbase[1])
return 15;
else
return 0;
}
static unsigned long
lopec_ide_default_io_base(int index)
{
if (lopec_ide_ports_known == 0)
lopec_ide_probe();
return lopec_ide_regbase[index];
}
static void __init
lopec_ide_init_hwif_ports(hw_regs_t *hw, unsigned long data,
unsigned long ctl, int *irq)
{
unsigned long reg = data;
uint alt_status_base;
int i;
for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
hw->io_ports[i] = reg++;
if (data == lopec_ide_regbase[0]) {
alt_status_base = lopec_ide_ctl_regbase[0] + 2;
hw->irq = 14;
} else if (data == lopec_ide_regbase[1]) {
alt_status_base = lopec_ide_ctl_regbase[1] + 2;
hw->irq = 15;
} else {
alt_status_base = 0;
hw->irq = 0;
}
if (ctl)
hw->io_ports[IDE_CONTROL_OFFSET] = ctl;
else
hw->io_ports[IDE_CONTROL_OFFSET] = alt_status_base;
if (irq != NULL)
*irq = hw->irq;
}
#endif /* BLK_DEV_IDE */
static void __init
lopec_init_IRQ(void)
{
int i;
/*
* Provide the open_pic code with the correct table of interrupts.
*/
OpenPIC_InitSenses = lopec_openpic_initsenses;
OpenPIC_NumInitSenses = sizeof(lopec_openpic_initsenses);
mpc10x_set_openpic();
/* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
&i8259_irq);
/*
* The EPIC allows for a read in the range of 0xFEF00000 ->
* 0xFEFFFFFF to generate a PCI interrupt-acknowledge transaction.
*/
i8259_init(0xfef00000, 0);
}
static int __init
lopec_request_io(void)
{
outb(0x00, 0x4d0);
outb(0xc0, 0x4d1);
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 0;
}
device_initcall(lopec_request_io);
static void __init
lopec_map_io(void)
{
io_block_mapping(0xf0000000, 0xf0000000, 0x10000000, _PAGE_IO);
io_block_mapping(0xb0000000, 0xb0000000, 0x10000000, _PAGE_IO);
}
/*
* Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
*/
static __inline__ void
lopec_set_bat(void)
{
mb();
mtspr(SPRN_DBAT1U, 0xf8000ffe);
mtspr(SPRN_DBAT1L, 0xf800002a);
mb();
}
TODC_ALLOC();
static void __init
lopec_setup_arch(void)
{
TODC_INIT(TODC_TYPE_MK48T37, 0, 0,
ioremap(0xffe80000, 0x8000), 8);
loops_per_jiffy = 100000000/HZ;
lopec_find_bridges();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#elif defined(CONFIG_ROOT_NFS)
ROOT_DEV = Root_NFS;
#elif defined(CONFIG_BLK_DEV_IDEDISK)
ROOT_DEV = Root_HDA1;
#else
ROOT_DEV = Root_SDA1;
#endif
#ifdef CONFIG_PPCBUG_NVRAM
/* Read in NVRAM data */
init_prep_nvram();
/* if no bootargs, look in NVRAM */
if ( cmd_line[0] == '\0' ) {
char *bootargs;
bootargs = prep_nvram_get_var("bootargs");
if (bootargs != NULL) {
strcpy(cmd_line, bootargs);
/* again.. */
strcpy(boot_command_line, cmd_line);
}
}
#endif
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
lopec_set_bat();
isa_io_base = MPC10X_MAPB_ISA_IO_BASE;
isa_mem_base = MPC10X_MAPB_ISA_MEM_BASE;
pci_dram_offset = MPC10X_MAPB_DRAM_OFFSET;
ISA_DMA_THRESHOLD = 0x00ffffff;
DMA_MODE_READ = 0x44;
DMA_MODE_WRITE = 0x48;
ppc_do_canonicalize_irqs = 1;
ppc_md.setup_arch = lopec_setup_arch;
ppc_md.show_cpuinfo = lopec_show_cpuinfo;
ppc_md.init_IRQ = lopec_init_IRQ;
ppc_md.get_irq = openpic_get_irq;
ppc_md.restart = lopec_restart;
ppc_md.power_off = lopec_power_off;
ppc_md.halt = lopec_halt;
ppc_md.setup_io_mappings = lopec_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_direct_read_val;
ppc_md.nvram_write_val = todc_direct_write_val;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
ppc_ide_md.default_irq = lopec_ide_default_irq;
ppc_ide_md.default_io_base = lopec_ide_default_io_base;
ppc_ide_md.ide_init_hwif = lopec_ide_init_hwif_ports;
#endif
#ifdef CONFIG_SERIAL_TEXT_DEBUG
ppc_md.progress = gen550_progress;
#endif
}
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