+++ /dev/null
-/*
- * Board setup routines for IBM Chestnut
- *
- * Author: <source@mvista.com>
- *
- * <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/kdev_t.h>
-#include <linux/major.h>
-#include <linux/blkdev.h>
-#include <linux/console.h>
-#include <linux/root_dev.h>
-#include <linux/initrd.h>
-#include <linux/delay.h>
-#include <linux/seq_file.h>
-#include <linux/serial.h>
-#include <linux/serial_core.h>
-#include <linux/serial_8250.h>
-#include <linux/mtd/physmap.h>
-#include <asm/system.h>
-#include <asm/pgtable.h>
-#include <asm/page.h>
-#include <asm/time.h>
-#include <asm/dma.h>
-#include <asm/io.h>
-#include <asm/hw_irq.h>
-#include <asm/machdep.h>
-#include <asm/kgdb.h>
-#include <asm/bootinfo.h>
-#include <asm/mv64x60.h>
-#include <platforms/chestnut.h>
-
-static void __iomem *sram_base; /* Virtual addr of Internal SRAM */
-static void __iomem *cpld_base; /* Virtual addr of CPLD Regs */
-
-static mv64x60_handle_t bh;
-
-extern void gen550_progress(char *, unsigned short);
-extern void gen550_init(int, struct uart_port *);
-extern void mv64360_pcibios_fixup(mv64x60_handle_t *bh);
-
-#define CHESTNUT_PRESERVE_MASK (BIT(MV64x60_CPU2DEV_0_WIN) | \
- BIT(MV64x60_CPU2DEV_1_WIN) | \
- BIT(MV64x60_CPU2DEV_2_WIN) | \
- BIT(MV64x60_CPU2DEV_3_WIN) | \
- BIT(MV64x60_CPU2BOOT_WIN))
-/**************************************************************************
- * FUNCTION: chestnut_calibrate_decr
- *
- * DESCRIPTION: initialize decrementer interrupt frequency (used as system
- * timer)
- *
- ****/
-static void __init
-chestnut_calibrate_decr(void)
-{
- ulong freq;
-
- freq = CHESTNUT_BUS_SPEED / 4;
-
- printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
- freq/1000000, freq%1000000);
-
- tb_ticks_per_jiffy = freq / HZ;
- tb_to_us = mulhwu_scale_factor(freq, 1000000);
-}
-
-static int
-chestnut_show_cpuinfo(struct seq_file *m)
-{
- seq_printf(m, "vendor\t\t: IBM\n");
- seq_printf(m, "machine\t\t: 750FX/GX Eval Board (Chestnut/Buckeye)\n");
-
- return 0;
-}
-
-/**************************************************************************
- * FUNCTION: chestnut_find_end_of_memory
- *
- * DESCRIPTION: ppc_md memory size callback
- *
- ****/
-unsigned long __init
-chestnut_find_end_of_memory(void)
-{
- static int mem_size = 0;
-
- if (mem_size == 0) {
- mem_size = mv64x60_get_mem_size(CONFIG_MV64X60_NEW_BASE,
- MV64x60_TYPE_MV64460);
- }
- return mem_size;
-}
-
-#if defined(CONFIG_SERIAL_8250)
-static void __init
-chestnut_early_serial_map(void)
-{
- struct uart_port port;
-
- /* Setup serial port access */
- memset(&port, 0, sizeof(port));
- port.uartclk = BASE_BAUD * 16;
- port.irq = UART0_INT;
- port.flags = STD_COM_FLAGS | UPF_IOREMAP;
- port.iotype = UPIO_MEM;
- port.mapbase = CHESTNUT_UART0_IO_BASE;
- port.regshift = 0;
-
- if (early_serial_setup(&port) != 0)
- printk("Early serial init of port 0 failed\n");
-
- /* Assume early_serial_setup() doesn't modify serial_req */
- port.line = 1;
- port.irq = UART1_INT;
- port.mapbase = CHESTNUT_UART1_IO_BASE;
-
- if (early_serial_setup(&port) != 0)
- printk("Early serial init of port 1 failed\n");
-}
-#endif
-
-/**************************************************************************
- * FUNCTION: chestnut_map_irq
- *
- * DESCRIPTION: 0 return since PCI IRQs not needed
- *
- ****/
-static int __init
-chestnut_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
-{
- static char pci_irq_table[][4] = {
- {CHESTNUT_PCI_SLOT0_IRQ, CHESTNUT_PCI_SLOT0_IRQ,
- CHESTNUT_PCI_SLOT0_IRQ, CHESTNUT_PCI_SLOT0_IRQ},
- {CHESTNUT_PCI_SLOT1_IRQ, CHESTNUT_PCI_SLOT1_IRQ,
- CHESTNUT_PCI_SLOT1_IRQ, CHESTNUT_PCI_SLOT1_IRQ},
- {CHESTNUT_PCI_SLOT2_IRQ, CHESTNUT_PCI_SLOT2_IRQ,
- CHESTNUT_PCI_SLOT2_IRQ, CHESTNUT_PCI_SLOT2_IRQ},
- {CHESTNUT_PCI_SLOT3_IRQ, CHESTNUT_PCI_SLOT3_IRQ,
- CHESTNUT_PCI_SLOT3_IRQ, CHESTNUT_PCI_SLOT3_IRQ},
- };
- const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
-
- return PCI_IRQ_TABLE_LOOKUP;
-}
-
-
-/**************************************************************************
- * FUNCTION: chestnut_setup_bridge
- *
- * DESCRIPTION: initalize board-specific settings on the MV64360
- *
- ****/
-static void __init
-chestnut_setup_bridge(void)
-{
- struct mv64x60_setup_info si;
- int i;
-
- if ( ppc_md.progress )
- ppc_md.progress("chestnut_setup_bridge: enter", 0);
-
- memset(&si, 0, sizeof(si));
-
- si.phys_reg_base = CONFIG_MV64X60_NEW_BASE;
-
- /* setup only PCI bus 0 (bus 1 not used) */
- si.pci_0.enable_bus = 1;
- si.pci_0.pci_io.cpu_base = CHESTNUT_PCI0_IO_PROC_ADDR;
- si.pci_0.pci_io.pci_base_hi = 0;
- si.pci_0.pci_io.pci_base_lo = CHESTNUT_PCI0_IO_PCI_ADDR;
- si.pci_0.pci_io.size = CHESTNUT_PCI0_IO_SIZE;
- si.pci_0.pci_io.swap = MV64x60_CPU2PCI_SWAP_NONE; /* no swapping */
- si.pci_0.pci_mem[0].cpu_base = CHESTNUT_PCI0_MEM_PROC_ADDR;
- si.pci_0.pci_mem[0].pci_base_hi = CHESTNUT_PCI0_MEM_PCI_HI_ADDR;
- si.pci_0.pci_mem[0].pci_base_lo = CHESTNUT_PCI0_MEM_PCI_LO_ADDR;
- si.pci_0.pci_mem[0].size = CHESTNUT_PCI0_MEM_SIZE;
- si.pci_0.pci_mem[0].swap = MV64x60_CPU2PCI_SWAP_NONE; /* no swapping */
- si.pci_0.pci_cmd_bits = 0;
- si.pci_0.latency_timer = 0x80;
-
- for (i=0; i<MV64x60_CPU2MEM_WINDOWS; i++) {
-#if defined(CONFIG_NOT_COHERENT_CACHE)
- si.cpu_prot_options[i] = 0;
- si.enet_options[i] = MV64360_ENET2MEM_SNOOP_NONE;
- si.mpsc_options[i] = MV64360_MPSC2MEM_SNOOP_NONE;
- si.idma_options[i] = MV64360_IDMA2MEM_SNOOP_NONE;
-
- si.pci_1.acc_cntl_options[i] =
- MV64360_PCI_ACC_CNTL_SNOOP_NONE |
- MV64360_PCI_ACC_CNTL_SWAP_NONE |
- MV64360_PCI_ACC_CNTL_MBURST_128_BYTES |
- MV64360_PCI_ACC_CNTL_RDSIZE_256_BYTES;
-#else
- si.cpu_prot_options[i] = 0;
- si.enet_options[i] = MV64360_ENET2MEM_SNOOP_NONE; /* errata */
- si.mpsc_options[i] = MV64360_MPSC2MEM_SNOOP_NONE; /* errata */
- si.idma_options[i] = MV64360_IDMA2MEM_SNOOP_NONE; /* errata */
-
- si.pci_1.acc_cntl_options[i] =
- MV64360_PCI_ACC_CNTL_SNOOP_WB |
- MV64360_PCI_ACC_CNTL_SWAP_NONE |
- MV64360_PCI_ACC_CNTL_MBURST_32_BYTES |
- MV64360_PCI_ACC_CNTL_RDSIZE_32_BYTES;
-#endif
- }
-
- /* Lookup host bridge - on CPU 0 - no SMP support */
- if (mv64x60_init(&bh, &si)) {
- printk("\n\nPCI Bridge initialization failed!\n");
- }
-
- pci_dram_offset = 0;
- ppc_md.pci_swizzle = common_swizzle;
- ppc_md.pci_map_irq = chestnut_map_irq;
- ppc_md.pci_exclude_device = mv64x60_pci_exclude_device;
-
- mv64x60_set_bus(&bh, 0, 0);
- bh.hose_a->first_busno = 0;
- bh.hose_a->last_busno = 0xff;
- bh.hose_a->last_busno = pciauto_bus_scan(bh.hose_a, 0);
-}
-
-void __init
-chestnut_setup_peripherals(void)
-{
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2BOOT_WIN,
- CHESTNUT_BOOT_8BIT_BASE, CHESTNUT_BOOT_8BIT_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2BOOT_WIN);
-
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_0_WIN,
- CHESTNUT_32BIT_BASE, CHESTNUT_32BIT_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_0_WIN);
-
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_1_WIN,
- CHESTNUT_CPLD_BASE, CHESTNUT_CPLD_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_1_WIN);
- cpld_base = ioremap(CHESTNUT_CPLD_BASE, CHESTNUT_CPLD_SIZE);
-
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_2_WIN,
- CHESTNUT_UART_BASE, CHESTNUT_UART_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_2_WIN);
-
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2DEV_3_WIN,
- CHESTNUT_FRAM_BASE, CHESTNUT_FRAM_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2DEV_3_WIN);
-
- mv64x60_set_32bit_window(&bh, MV64x60_CPU2SRAM_WIN,
- CHESTNUT_INTERNAL_SRAM_BASE, MV64360_SRAM_SIZE, 0);
- bh.ci->enable_window_32bit(&bh, MV64x60_CPU2SRAM_WIN);
-
-#ifdef CONFIG_NOT_COHERENT_CACHE
- mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x001600b0);
-#else
- mv64x60_write(&bh, MV64360_SRAM_CONFIG, 0x001600b2);
-#endif
- sram_base = ioremap(CHESTNUT_INTERNAL_SRAM_BASE, MV64360_SRAM_SIZE);
- memset(sram_base, 0, MV64360_SRAM_SIZE);
-
- /*
- * Configure MPP pins for PCI DMA
- *
- * PCI Slot GNT pin REQ pin
- * 0 MPP16 MPP17
- * 1 MPP18 MPP19
- * 2 MPP20 MPP21
- * 3 MPP22 MPP23
- */
- mv64x60_write(&bh, MV64x60_MPP_CNTL_2,
- (0x1 << 0) | /* MPPSel16 PCI0_GNT[0] */
- (0x1 << 4) | /* MPPSel17 PCI0_REQ[0] */
- (0x1 << 8) | /* MPPSel18 PCI0_GNT[1] */
- (0x1 << 12) | /* MPPSel19 PCI0_REQ[1] */
- (0x1 << 16) | /* MPPSel20 PCI0_GNT[2] */
- (0x1 << 20) | /* MPPSel21 PCI0_REQ[2] */
- (0x1 << 24) | /* MPPSel22 PCI0_GNT[3] */
- (0x1 << 28)); /* MPPSel23 PCI0_REQ[3] */
- /*
- * Set unused MPP pins for output, as per schematic note
- *
- * Unused Pins: MPP01, MPP02, MPP04, MPP05, MPP06
- * MPP09, MPP10, MPP13, MPP14, MPP15
- */
- mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_0,
- (0xf << 4) | /* MPPSel01 GPIO[1] */
- (0xf << 8) | /* MPPSel02 GPIO[2] */
- (0xf << 16) | /* MPPSel04 GPIO[4] */
- (0xf << 20) | /* MPPSel05 GPIO[5] */
- (0xf << 24)); /* MPPSel06 GPIO[6] */
- mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_1,
- (0xf << 4) | /* MPPSel09 GPIO[9] */
- (0xf << 8) | /* MPPSel10 GPIO[10] */
- (0xf << 20) | /* MPPSel13 GPIO[13] */
- (0xf << 24) | /* MPPSel14 GPIO[14] */
- (0xf << 28)); /* MPPSel15 GPIO[15] */
- mv64x60_set_bits(&bh, MV64x60_GPP_IO_CNTL, /* Output */
- BIT(1) | BIT(2) | BIT(4) | BIT(5) | BIT(6) |
- BIT(9) | BIT(10) | BIT(13) | BIT(14) | BIT(15));
-
- /*
- * Configure the following MPP pins to indicate a level
- * triggered interrupt
- *
- * MPP24 - Board Reset (just map the MPP & GPP for chestnut_reset)
- * MPP25 - UART A (high)
- * MPP26 - UART B (high)
- * MPP28 - PCI Slot 3 (low)
- * MPP29 - PCI Slot 2 (low)
- * MPP30 - PCI Slot 1 (low)
- * MPP31 - PCI Slot 0 (low)
- */
- mv64x60_clr_bits(&bh, MV64x60_MPP_CNTL_3,
- BIT(3) | BIT(2) | BIT(1) | BIT(0) | /* MPP 24 */
- BIT(7) | BIT(6) | BIT(5) | BIT(4) | /* MPP 25 */
- BIT(11) | BIT(10) | BIT(9) | BIT(8) | /* MPP 26 */
- BIT(19) | BIT(18) | BIT(17) | BIT(16) | /* MPP 28 */
- BIT(23) | BIT(22) | BIT(21) | BIT(20) | /* MPP 29 */
- BIT(27) | BIT(26) | BIT(25) | BIT(24) | /* MPP 30 */
- BIT(31) | BIT(30) | BIT(29) | BIT(28)); /* MPP 31 */
-
- /*
- * Define GPP 25 (high), 26 (high), 28 (low), 29 (low), 30 (low),
- * 31 (low) interrupt polarity input signal and level triggered
- */
- mv64x60_clr_bits(&bh, MV64x60_GPP_LEVEL_CNTL, BIT(25) | BIT(26));
- mv64x60_set_bits(&bh, MV64x60_GPP_LEVEL_CNTL,
- BIT(28) | BIT(29) | BIT(30) | BIT(31));
- mv64x60_clr_bits(&bh, MV64x60_GPP_IO_CNTL,
- BIT(25) | BIT(26) | BIT(28) | BIT(29) | BIT(30) |
- BIT(31));
-
- /* Config GPP interrupt controller to respond to level trigger */
- mv64x60_set_bits(&bh, MV64360_COMM_ARBITER_CNTL, BIT(10));
-
- /*
- * Dismiss and then enable interrupt on GPP interrupt cause for CPU #0
- */
- mv64x60_write(&bh, MV64x60_GPP_INTR_CAUSE,
- ~(BIT(25) | BIT(26) | BIT(28) | BIT(29) | BIT(30) |
- BIT(31)));
- mv64x60_set_bits(&bh, MV64x60_GPP_INTR_MASK,
- BIT(25) | BIT(26) | BIT(28) | BIT(29) | BIT(30) |
- BIT(31));
-
- /*
- * Dismiss and then enable interrupt on CPU #0 high cause register
- * BIT27 summarizes GPP interrupts 24-31
- */
- mv64x60_set_bits(&bh, MV64360_IC_CPU0_INTR_MASK_HI, BIT(27));
-
- if (ppc_md.progress)
- ppc_md.progress("chestnut_setup_bridge: exit", 0);
-}
-
-/**************************************************************************
- * FUNCTION: chestnut_setup_arch
- *
- * DESCRIPTION: ppc_md machine configuration callback
- *
- ****/
-static void __init
-chestnut_setup_arch(void)
-{
- if (ppc_md.progress)
- ppc_md.progress("chestnut_setup_arch: enter", 0);
-
- /* init to some ~sane value until calibrate_delay() runs */
- loops_per_jiffy = 50000000 / HZ;
-
- /* if the time base value is greater than bus freq/4 (the TB and
- * decrementer tick rate) + signed integer rollover value, we
- * can spend a fair amount of time waiting for the rollover to
- * happen. To get around this, initialize the time base register
- * to a "safe" value.
- */
- set_tb(0, 0);
-
-#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_SDA2;
-#endif
-
- /*
- * Set up the L2CR register.
- */
- _set_L2CR(_get_L2CR() | L2CR_L2E);
-
- chestnut_setup_bridge();
- chestnut_setup_peripherals();
-
-#ifdef CONFIG_DUMMY_CONSOLE
- conswitchp = &dummy_con;
-#endif
-
-#if defined(CONFIG_SERIAL_8250)
- chestnut_early_serial_map();
-#endif
-
- /* Identify the system */
- printk(KERN_INFO "System Identification: IBM 750FX/GX Eval Board\n");
- printk(KERN_INFO "IBM 750FX/GX port (C) 2004 MontaVista Software, Inc."
- " (source@mvista.com)\n");
-
- if (ppc_md.progress)
- ppc_md.progress("chestnut_setup_arch: exit", 0);
-}
-
-#ifdef CONFIG_MTD_PHYSMAP
-static struct mtd_partition ptbl;
-
-static int __init
-chestnut_setup_mtd(void)
-{
- memset(&ptbl, 0, sizeof(ptbl));
-
- ptbl.name = "User FS";
- ptbl.size = CHESTNUT_32BIT_SIZE;
-
- physmap_map.size = CHESTNUT_32BIT_SIZE;
- physmap_set_partitions(&ptbl, 1);
- return 0;
-}
-
-arch_initcall(chestnut_setup_mtd);
-#endif
-
-/**************************************************************************
- * FUNCTION: chestnut_restart
- *
- * DESCRIPTION: ppc_md machine reset callback
- * reset the board via the CPLD command register
- *
- ****/
-static void
-chestnut_restart(char *cmd)
-{
- volatile ulong i = 10000000;
-
- local_irq_disable();
-
- /*
- * Set CPLD Reg 3 bit 0 to 1 to allow MPP signals on reset to work
- *
- * MPP24 - board reset
- */
- writeb(0x1, cpld_base + 3);
-
- /* GPP pin tied to MPP earlier */
- mv64x60_set_bits(&bh, MV64x60_GPP_VALUE_SET, BIT(24));
-
- while (i-- > 0);
- panic("restart failed\n");
-}
-
-static void
-chestnut_halt(void)
-{
- local_irq_disable();
- for (;;);
- /* NOTREACHED */
-}
-
-static void
-chestnut_power_off(void)
-{
- chestnut_halt();
- /* NOTREACHED */
-}
-
-/**************************************************************************
- * FUNCTION: chestnut_map_io
- *
- * DESCRIPTION: configure fixed memory-mapped IO
- *
- ****/
-static void __init
-chestnut_map_io(void)
-{
-#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
- io_block_mapping(CHESTNUT_UART_BASE, CHESTNUT_UART_BASE, 0x100000,
- _PAGE_IO);
-#endif
-}
-
-/**************************************************************************
- * FUNCTION: chestnut_set_bat
- *
- * DESCRIPTION: configures a (temporary) bat mapping for early access to
- * device I/O
- *
- ****/
-static __inline__ void
-chestnut_set_bat(void)
-{
- mb();
- mtspr(SPRN_DBAT3U, 0xf0001ffe);
- mtspr(SPRN_DBAT3L, 0xf000002a);
- mb();
-}
-
-/**************************************************************************
- * FUNCTION: platform_init
- *
- * DESCRIPTION: main entry point for configuring board-specific machine
- * callbacks
- *
- ****/
-void __init
-platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
-{
- parse_bootinfo(find_bootinfo());
-
- /* Copy the kernel command line arguments to a safe place. */
-
- if (r6) {
- *(char *) (r7 + KERNELBASE) = 0;
- strcpy(cmd_line, (char *) (r6 + KERNELBASE));
- }
-
- isa_mem_base = 0;
-
- ppc_md.setup_arch = chestnut_setup_arch;
- ppc_md.show_cpuinfo = chestnut_show_cpuinfo;
- ppc_md.init_IRQ = mv64360_init_irq;
- ppc_md.get_irq = mv64360_get_irq;
- ppc_md.init = NULL;
-
- ppc_md.find_end_of_memory = chestnut_find_end_of_memory;
- ppc_md.setup_io_mappings = chestnut_map_io;
-
- ppc_md.restart = chestnut_restart;
- ppc_md.power_off = chestnut_power_off;
- ppc_md.halt = chestnut_halt;
-
- ppc_md.time_init = NULL;
- ppc_md.set_rtc_time = NULL;
- ppc_md.get_rtc_time = NULL;
- ppc_md.calibrate_decr = chestnut_calibrate_decr;
-
- ppc_md.nvram_read_val = NULL;
- ppc_md.nvram_write_val = NULL;
-
- ppc_md.heartbeat = NULL;
-
- bh.p_base = CONFIG_MV64X60_NEW_BASE;
-
- chestnut_set_bat();
-
-#if defined(CONFIG_SERIAL_TEXT_DEBUG)
- ppc_md.progress = gen550_progress;
-#endif
-#if defined(CONFIG_KGDB)
- ppc_md.kgdb_map_scc = gen550_kgdb_map_scc;
-#endif
-
- if (ppc_md.progress)
- ppc_md.progress("chestnut_init(): exit", 0);
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff