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linux-stable-rt/arch/ppc/platforms/spruce.c

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/*
* Board and PCI setup routines for IBM Spruce
*
* Author: MontaVista Software <source@mvista.com>
*
* 2000-2004 (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/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/initrd.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.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/time.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/kgdb.h>
#include <syslib/cpc700.h>
#include "spruce.h"
static inline int
spruce_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, 24, 25, 26}, /* IDSEL 1 - PCI slot 3 */
{24, 25, 26, 23}, /* IDSEL 2 - PCI slot 2 */
{25, 26, 23, 24}, /* IDSEL 3 - PCI slot 1 */
{26, 23, 24, 25}, /* IDSEL 4 - PCI slot 0 */
};
const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
}
static void __init
spruce_setup_hose(void)
{
struct pci_controller *hose;
/* Setup hose */
hose = pcibios_alloc_controller();
if (!hose)
return;
hose->first_busno = 0;
hose->last_busno = 0xff;
pci_init_resource(&hose->io_resource,
SPRUCE_PCI_LOWER_IO,
SPRUCE_PCI_UPPER_IO,
IORESOURCE_IO,
"PCI host bridge");
pci_init_resource(&hose->mem_resources[0],
SPRUCE_PCI_LOWER_MEM,
SPRUCE_PCI_UPPER_MEM,
IORESOURCE_MEM,
"PCI host bridge");
hose->io_space.start = SPRUCE_PCI_LOWER_IO;
hose->io_space.end = SPRUCE_PCI_UPPER_IO;
hose->mem_space.start = SPRUCE_PCI_LOWER_MEM;
hose->mem_space.end = SPRUCE_PCI_UPPER_MEM;
hose->io_base_virt = (void *)SPRUCE_ISA_IO_BASE;
setup_indirect_pci(hose,
SPRUCE_PCI_CONFIG_ADDR,
SPRUCE_PCI_CONFIG_DATA);
hose->last_busno = pciauto_bus_scan(hose, hose->first_busno);
ppc_md.pci_swizzle = common_swizzle;
ppc_md.pci_map_irq = spruce_map_irq;
}
/*
* CPC700 PIC interrupt programming table
*
* First entry is the sensitivity (level/edge), second is the polarity.
*/
unsigned int cpc700_irq_assigns[32][2] = {
{ 1, 1 }, /* IRQ 0: ECC Correctable Error - rising edge */
{ 1, 1 }, /* IRQ 1: PCI Write Mem Range - rising edge */
{ 0, 1 }, /* IRQ 2: PCI Write Command Reg - active high */
{ 0, 1 }, /* IRQ 3: UART 0 - active high */
{ 0, 1 }, /* IRQ 4: UART 1 - active high */
{ 0, 1 }, /* IRQ 5: ICC 0 - active high */
{ 0, 1 }, /* IRQ 6: ICC 1 - active high */
{ 0, 1 }, /* IRQ 7: GPT Compare 0 - active high */
{ 0, 1 }, /* IRQ 8: GPT Compare 1 - active high */
{ 0, 1 }, /* IRQ 9: GPT Compare 2 - active high */
{ 0, 1 }, /* IRQ 10: GPT Compare 3 - active high */
{ 0, 1 }, /* IRQ 11: GPT Compare 4 - active high */
{ 0, 1 }, /* IRQ 12: GPT Capture 0 - active high */
{ 0, 1 }, /* IRQ 13: GPT Capture 1 - active high */
{ 0, 1 }, /* IRQ 14: GPT Capture 2 - active high */
{ 0, 1 }, /* IRQ 15: GPT Capture 3 - active high */
{ 0, 1 }, /* IRQ 16: GPT Capture 4 - active high */
{ 0, 0 }, /* IRQ 17: Reserved */
{ 0, 0 }, /* IRQ 18: Reserved */
{ 0, 0 }, /* IRQ 19: Reserved */
{ 0, 1 }, /* IRQ 20: FPGA EXT_IRQ0 - active high */
{ 1, 1 }, /* IRQ 21: Mouse - rising edge */
{ 1, 1 }, /* IRQ 22: Keyboard - rising edge */
{ 0, 0 }, /* IRQ 23: PCI Slot 3 - active low */
{ 0, 0 }, /* IRQ 24: PCI Slot 2 - active low */
{ 0, 0 }, /* IRQ 25: PCI Slot 1 - active low */
{ 0, 0 }, /* IRQ 26: PCI Slot 0 - active low */
};
static void __init
spruce_calibrate_decr(void)
{
int freq, divisor = 4;
/* determine processor bus speed */
freq = SPRUCE_BUS_SPEED;
tb_ticks_per_jiffy = freq / HZ / divisor;
tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
}
static int
spruce_show_cpuinfo(struct seq_file *m)
{
seq_printf(m, "vendor\t\t: IBM\n");
seq_printf(m, "machine\t\t: Spruce\n");
return 0;
}
static void __init
spruce_early_serial_map(void)
{
u32 uart_clk;
struct uart_port serial_req;
if (SPRUCE_UARTCLK_IS_33M(readb(SPRUCE_FPGA_REG_A)))
uart_clk = SPRUCE_BAUD_33M * 16;
else
uart_clk = SPRUCE_BAUD_30M * 16;
/* Setup serial port access */
memset(&serial_req, 0, sizeof(serial_req));
serial_req.uartclk = uart_clk;
serial_req.irq = UART0_INT;
serial_req.flags = UPF_BOOT_AUTOCONF;
serial_req.iotype = UPIO_MEM;
serial_req.membase = (u_char *)UART0_IO_BASE;
serial_req.regshift = 0;
#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
gen550_init(0, &serial_req);
#endif
#ifdef CONFIG_SERIAL_8250
if (early_serial_setup(&serial_req) != 0)
printk("Early serial init of port 0 failed\n");
#endif
/* Assume early_serial_setup() doesn't modify serial_req */
serial_req.line = 1;
serial_req.irq = UART1_INT;
serial_req.membase = (u_char *)UART1_IO_BASE;
#if defined(CONFIG_KGDB) || defined(CONFIG_SERIAL_TEXT_DEBUG)
gen550_init(1, &serial_req);
#endif
#ifdef CONFIG_SERIAL_8250
if (early_serial_setup(&serial_req) != 0)
printk("Early serial init of port 1 failed\n");
#endif
}
TODC_ALLOC();
static void __init
spruce_setup_arch(void)
{
/* Setup TODC access */
TODC_INIT(TODC_TYPE_DS1643, 0, 0, SPRUCE_RTC_BASE_ADDR, 8);
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000 / HZ;
/* Setup PCI host bridge */
spruce_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_SDA1;
#endif
/* Identify the system */
printk(KERN_INFO "System Identification: IBM Spruce\n");
printk(KERN_INFO "Port by MontaVista Software, Inc. (source@mvista.com)\n");
}
static void
spruce_restart(char *cmd)
{
local_irq_disable();
/* SRR0 has system reset vector, SRR1 has default MSR value */
/* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */
__asm__ __volatile__
("\n\
lis 3,0xfff0 \n\
ori 3,3,0x0100 \n\
mtspr 26,3 \n\
li 3,0 \n\
mtspr 27,3 \n\
rfi \n\
");
for(;;);
}
static void
spruce_power_off(void)
{
for(;;);
}
static void
spruce_halt(void)
{
spruce_restart(NULL);
}
static void __init
spruce_map_io(void)
{
io_block_mapping(SPRUCE_PCI_IO_BASE, SPRUCE_PCI_PHY_IO_BASE,
0x08000000, _PAGE_IO);
}
/*
* Set BAT 3 to map 0xf8000000 to end of physical memory space 1-to-1.
*/
static __inline__ void
spruce_set_bat(void)
{
mb();
mtspr(SPRN_DBAT1U, 0xf8000ffe);
mtspr(SPRN_DBAT1L, 0xf800002a);
mb();
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
parse_bootinfo(find_bootinfo());
/* Map in board regs, etc. */
spruce_set_bat();
isa_io_base = SPRUCE_ISA_IO_BASE;
pci_dram_offset = SPRUCE_PCI_SYS_MEM_BASE;
ppc_md.setup_arch = spruce_setup_arch;
ppc_md.show_cpuinfo = spruce_show_cpuinfo;
ppc_md.init_IRQ = cpc700_init_IRQ;
ppc_md.get_irq = cpc700_get_irq;
ppc_md.setup_io_mappings = spruce_map_io;
ppc_md.restart = spruce_restart;
ppc_md.power_off = spruce_power_off;
ppc_md.halt = spruce_halt;
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 = spruce_calibrate_decr;
ppc_md.nvram_read_val = todc_direct_read_val;
ppc_md.nvram_write_val = todc_direct_write_val;
spruce_early_serial_map();
#ifdef CONFIG_SERIAL_TEXT_DEBUG
ppc_md.progress = gen550_progress;
#endif /* CONFIG_SERIAL_TEXT_DEBUG */
#ifdef CONFIG_KGDB
ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
#endif
}
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