From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/ppc/platforms/spruce.c | 325 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 arch/ppc/platforms/spruce.c (limited to 'arch/ppc/platforms/spruce.c') diff --git a/arch/ppc/platforms/spruce.c b/arch/ppc/platforms/spruce.c new file mode 100644 index 0000000..5ad70d3 --- /dev/null +++ b/arch/ppc/platforms/spruce.c @@ -0,0 +1,325 @@ +/* + * arch/ppc/platforms/spruce.c + * + * Board and PCI setup routines for IBM Spruce + * + * Author: MontaVista Software + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#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 = ASYNC_BOOT_AUTOCONF; + serial_req.iotype = SERIAL_IO_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 +} -- cgit v1.1