/* * SBC82XX platform support * * Author: Guy Streeter * * Derived from: est8260_setup.c by Allen Curtis, ONZ * * Copyright 2004 Red Hat, Inc. * * 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 #include #include #include #include #include #include #include #include #include #include #include static void (*callback_init_IRQ)(void); extern unsigned char __res[sizeof(bd_t)]; extern void (*late_time_init)(void); #ifdef CONFIG_GEN_RTC TODC_ALLOC(); /* * Timer init happens before mem_init but after paging init, so we cannot * directly use ioremap() at that time. * late_time_init() is call after paging init. */ static void sbc82xx_time_init(void) { volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; /* Set up CS11 for RTC chip */ mc->memc_br11=0; mc->memc_or11=0xffff0836; mc->memc_br11=SBC82xx_TODC_NVRAM_ADDR | 0x0801; TODC_INIT(TODC_TYPE_MK48T59, 0, 0, SBC82xx_TODC_NVRAM_ADDR, 0); todc_info->nvram_data = (unsigned int)ioremap(todc_info->nvram_data, 0x2000); BUG_ON(!todc_info->nvram_data); ppc_md.get_rtc_time = todc_get_rtc_time; ppc_md.set_rtc_time = todc_set_rtc_time; ppc_md.nvram_read_val = todc_direct_read_val; ppc_md.nvram_write_val = todc_direct_write_val; todc_time_init(); } #endif /* CONFIG_GEN_RTC */ static volatile char *sbc82xx_i8259_map; static char sbc82xx_i8259_mask = 0xff; static DEFINE_SPINLOCK(sbc82xx_i8259_lock); static void sbc82xx_i8259_mask_and_ack_irq(unsigned int irq_nr) { unsigned long flags; irq_nr -= NR_SIU_INTS; spin_lock_irqsave(&sbc82xx_i8259_lock, flags); sbc82xx_i8259_mask |= 1 << irq_nr; (void) sbc82xx_i8259_map[1]; /* Dummy read */ sbc82xx_i8259_map[1] = sbc82xx_i8259_mask; sbc82xx_i8259_map[0] = 0x20; /* OCW2: Non-specific EOI */ spin_unlock_irqrestore(&sbc82xx_i8259_lock, flags); } static void sbc82xx_i8259_mask_irq(unsigned int irq_nr) { unsigned long flags; irq_nr -= NR_SIU_INTS; spin_lock_irqsave(&sbc82xx_i8259_lock, flags); sbc82xx_i8259_mask |= 1 << irq_nr; sbc82xx_i8259_map[1] = sbc82xx_i8259_mask; spin_unlock_irqrestore(&sbc82xx_i8259_lock, flags); } static void sbc82xx_i8259_unmask_irq(unsigned int irq_nr) { unsigned long flags; irq_nr -= NR_SIU_INTS; spin_lock_irqsave(&sbc82xx_i8259_lock, flags); sbc82xx_i8259_mask &= ~(1 << irq_nr); sbc82xx_i8259_map[1] = sbc82xx_i8259_mask; spin_unlock_irqrestore(&sbc82xx_i8259_lock, flags); } static void sbc82xx_i8259_end_irq(unsigned int irq) { if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)) && irq_desc[irq].action) sbc82xx_i8259_unmask_irq(irq); } struct hw_interrupt_type sbc82xx_i8259_ic = { .typename = " i8259 ", .enable = sbc82xx_i8259_unmask_irq, .disable = sbc82xx_i8259_mask_irq, .ack = sbc82xx_i8259_mask_and_ack_irq, .end = sbc82xx_i8259_end_irq, }; static irqreturn_t sbc82xx_i8259_demux(int irq, void *dev_id, struct pt_regs *regs) { spin_lock(&sbc82xx_i8259_lock); sbc82xx_i8259_map[0] = 0x0c; /* OCW3: Read IR register on RD# pulse */ irq = sbc82xx_i8259_map[0] & 7; /* Read IRR */ if (irq == 7) { /* Possible spurious interrupt */ int isr; sbc82xx_i8259_map[0] = 0x0b; /* OCW3: Read IS register on RD# pulse */ isr = sbc82xx_i8259_map[0]; /* Read ISR */ if (!(isr & 0x80)) { printk(KERN_INFO "Spurious i8259 interrupt\n"); return IRQ_HANDLED; } } __do_IRQ(NR_SIU_INTS + irq, regs); return IRQ_HANDLED; } static struct irqaction sbc82xx_i8259_irqaction = { .handler = sbc82xx_i8259_demux, .flags = SA_INTERRUPT, .mask = CPU_MASK_NONE, .name = "i8259 demux", }; void __init sbc82xx_init_IRQ(void) { volatile memctl_cpm2_t *mc = &cpm2_immr->im_memctl; volatile intctl_cpm2_t *ic = &cpm2_immr->im_intctl; int i; callback_init_IRQ(); /* u-boot doesn't always set the board up correctly */ mc->memc_br5 = 0; mc->memc_or5 = 0xfff00856; mc->memc_br5 = 0x22000801; sbc82xx_i8259_map = ioremap(0x22008000, 2); if (!sbc82xx_i8259_map) { printk(KERN_CRIT "Mapping i8259 interrupt controller failed\n"); return; } /* Set up the interrupt handlers for the i8259 IRQs */ for (i = NR_SIU_INTS; i < NR_SIU_INTS + 8; i++) { irq_desc[i].handler = &sbc82xx_i8259_ic; irq_desc[i].status |= IRQ_LEVEL; } /* make IRQ6 level sensitive */ ic->ic_siexr &= ~(1 << (14 - (SIU_INT_IRQ6 - SIU_INT_IRQ1))); irq_desc[SIU_INT_IRQ6].status |= IRQ_LEVEL; /* Initialise the i8259 */ sbc82xx_i8259_map[0] = 0x1b; /* ICW1: Level, no cascade, ICW4 */ sbc82xx_i8259_map[1] = 0x00; /* ICW2: vector base */ /* No ICW3 (no cascade) */ sbc82xx_i8259_map[1] = 0x01; /* ICW4: 8086 mode, normal EOI */ sbc82xx_i8259_map[0] = 0x0b; /* OCW3: Read IS register on RD# pulse */ sbc82xx_i8259_map[1] = sbc82xx_i8259_mask; /* Set interrupt mask */ /* Request cascade IRQ */ if (setup_irq(SIU_INT_IRQ6, &sbc82xx_i8259_irqaction)) { printk("Installation of i8259 IRQ demultiplexer failed.\n"); } } static int sbc82xx_pci_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 */ { SBC82xx_PIRQA, SBC82xx_PIRQB, SBC82xx_PIRQC, SBC82xx_PIRQD }, /* IDSEL 16 - PMC slot */ { SBC82xx_PC_IRQA, SBC82xx_PC_IRQB, -1, -1 }, /* IDSEL 17 - CardBus */ { SBC82xx_PIRQA, SBC82xx_PIRQB, SBC82xx_PIRQC, SBC82xx_PIRQD }, /* IDSEL 18 - PCI-X bridge */ }; const long min_idsel = 16, max_idsel = 18, irqs_per_slot = 4; return PCI_IRQ_TABLE_LOOKUP; } static void __devinit quirk_sbc8260_cardbus(struct pci_dev *pdev) { uint32_t ctrl; if (pdev->bus->number != 0 || pdev->devfn != PCI_DEVFN(17, 0)) return; printk(KERN_INFO "Setting up CardBus controller\n"); /* Set P2CCLK bit in System Control Register */ pci_read_config_dword(pdev, 0x80, &ctrl); ctrl |= (1<<27); pci_write_config_dword(pdev, 0x80, ctrl); /* Set MFUNC up for PCI IRQ routing via INTA and INTB, and LEDs. */ pci_write_config_dword(pdev, 0x8c, 0x00c01d22); } DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_1420, quirk_sbc8260_cardbus); void __init m82xx_board_init(void) { /* u-boot may be using one of the FCC Ethernet devices. Use the MAC address to the SCC. */ __res[offsetof(bd_t, bi_enetaddr[5])] &= ~3; /* Anything special for this platform */ callback_init_IRQ = ppc_md.init_IRQ; ppc_md.init_IRQ = sbc82xx_init_IRQ; ppc_md.pci_map_irq = sbc82xx_pci_map_irq; #ifdef CONFIG_GEN_RTC ppc_md.time_init = NULL; ppc_md.get_rtc_time = NULL; ppc_md.set_rtc_time = NULL; ppc_md.nvram_read_val = NULL; ppc_md.nvram_write_val = NULL; late_time_init = sbc82xx_time_init; #endif /* CONFIG_GEN_RTC */ }