diff options
Diffstat (limited to 'arch/ppc/platforms/4xx/ebony.c')
| -rw-r--r-- | arch/ppc/platforms/4xx/ebony.c | 356 |
1 files changed, 356 insertions, 0 deletions
diff --git a/arch/ppc/platforms/4xx/ebony.c b/arch/ppc/platforms/4xx/ebony.c new file mode 100644 index 00000000000..f63bca83e75 --- /dev/null +++ b/arch/ppc/platforms/4xx/ebony.c @@ -0,0 +1,356 @@ +/* + * 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 +} + |