diff options
Diffstat (limited to 'arch/ppc/syslib/m82xx_pci.c')
| -rw-r--r-- | arch/ppc/syslib/m82xx_pci.c | 346 |
1 files changed, 0 insertions, 346 deletions
diff --git a/arch/ppc/syslib/m82xx_pci.c b/arch/ppc/syslib/m82xx_pci.c deleted file mode 100644 index 657a1c25a2a..00000000000 --- a/arch/ppc/syslib/m82xx_pci.c +++ /dev/null @@ -1,346 +0,0 @@ -/* - * - * (C) Copyright 2003 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * (C) Copyright 2004 Red Hat, Inc. - * - * 2005 (c) MontaVista Software, Inc. - * Vitaly Bordug <vbordug@ru.mvista.com> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/pci.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/irq.h> -#include <linux/interrupt.h> - -#include <asm/byteorder.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/uaccess.h> -#include <asm/machdep.h> -#include <asm/pci-bridge.h> -#include <asm/immap_cpm2.h> -#include <asm/mpc8260.h> -#include <asm/cpm2.h> - -#include "m82xx_pci.h" - -/* - * Interrupt routing - */ - -static inline int -pq2pci_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 - */ - { - { PIRQA, PIRQB, PIRQC, PIRQD }, /* IDSEL 22 - PCI slot 0 */ - { PIRQD, PIRQA, PIRQB, PIRQC }, /* IDSEL 23 - PCI slot 1 */ - { PIRQC, PIRQD, PIRQA, PIRQB }, /* IDSEL 24 - PCI slot 2 */ - }; - - const long min_idsel = 22, max_idsel = 24, irqs_per_slot = 4; - return PCI_IRQ_TABLE_LOOKUP; -} - -static void -pq2pci_mask_irq(unsigned int irq) -{ - int bit = irq - NR_CPM_INTS; - - *(volatile unsigned long *) PCI_INT_MASK_REG |= (1 << (31 - bit)); - return; -} - -static void -pq2pci_unmask_irq(unsigned int irq) -{ - int bit = irq - NR_CPM_INTS; - - *(volatile unsigned long *) PCI_INT_MASK_REG &= ~(1 << (31 - bit)); - return; -} - -static void -pq2pci_mask_and_ack(unsigned int irq) -{ - int bit = irq - NR_CPM_INTS; - - *(volatile unsigned long *) PCI_INT_MASK_REG |= (1 << (31 - bit)); - return; -} - -static void -pq2pci_end_irq(unsigned int irq) -{ - int bit = irq - NR_CPM_INTS; - - *(volatile unsigned long *) PCI_INT_MASK_REG &= ~(1 << (31 - bit)); - return; -} - -struct hw_interrupt_type pq2pci_ic = { - "PQ2 PCI", - NULL, - NULL, - pq2pci_unmask_irq, - pq2pci_mask_irq, - pq2pci_mask_and_ack, - pq2pci_end_irq, - 0 -}; - -static irqreturn_t -pq2pci_irq_demux(int irq, void *dev_id) -{ - unsigned long stat, mask, pend; - int bit; - - for(;;) { - stat = *(volatile unsigned long *) PCI_INT_STAT_REG; - mask = *(volatile unsigned long *) PCI_INT_MASK_REG; - pend = stat & ~mask & 0xf0000000; - if (!pend) - break; - for (bit = 0; pend != 0; ++bit, pend <<= 1) { - if (pend & 0x80000000) - __do_IRQ(NR_CPM_INTS + bit); - } - } - - return IRQ_HANDLED; -} - -static struct irqaction pq2pci_irqaction = { - .handler = pq2pci_irq_demux, - .flags = IRQF_DISABLED, - .mask = CPU_MASK_NONE, - .name = "PQ2 PCI cascade", -}; - - -void -pq2pci_init_irq(void) -{ - int irq; - volatile cpm2_map_t *immap = cpm2_immr; - for (irq = NR_CPM_INTS; irq < NR_CPM_INTS + 4; irq++) - irq_desc[irq].chip = &pq2pci_ic; - - /* make PCI IRQ level sensitive */ - immap->im_intctl.ic_siexr &= - ~(1 << (14 - (PCI_INT_TO_SIU - SIU_INT_IRQ1))); - - /* mask all PCI interrupts */ - *(volatile unsigned long *) PCI_INT_MASK_REG |= 0xfff00000; - - /* install the demultiplexer for the PCI cascade interrupt */ - setup_irq(PCI_INT_TO_SIU, &pq2pci_irqaction); - return; -} - -static int -pq2pci_exclude_device(u_char bus, u_char devfn) -{ - return PCIBIOS_SUCCESSFUL; -} - -/* PCI bus configuration registers. - */ -static void -pq2ads_setup_pci(struct pci_controller *hose) -{ - __u32 val; - volatile cpm2_map_t *immap = cpm2_immr; - bd_t* binfo = (bd_t*) __res; - u32 sccr = immap->im_clkrst.car_sccr; - uint pci_div,freq,time; - /* PCI int lowest prio */ - /* Each 4 bits is a device bus request and the MS 4bits - is highest priority */ - /* Bus 4bit value - --- ---------- - CPM high 0b0000 - CPM middle 0b0001 - CPM low 0b0010 - PCI request 0b0011 - Reserved 0b0100 - Reserved 0b0101 - Internal Core 0b0110 - External Master 1 0b0111 - External Master 2 0b1000 - External Master 3 0b1001 - The rest are reserved - */ - immap->im_siu_conf.siu_82xx.sc_ppc_alrh = 0x61207893; - /* park bus on core */ - immap->im_siu_conf.siu_82xx.sc_ppc_acr = PPC_ACR_BUS_PARK_CORE; - /* - * Set up master windows that allow the CPU to access PCI space. These - * windows are set up using the two SIU PCIBR registers. - */ - - immap->im_memctl.memc_pcimsk0 = M82xx_PCI_PRIM_WND_SIZE; - immap->im_memctl.memc_pcibr0 = M82xx_PCI_PRIM_WND_BASE | PCIBR_ENABLE; - -#ifdef M82xx_PCI_SEC_WND_SIZE - immap->im_memctl.memc_pcimsk1 = M82xx_PCI_SEC_WND_SIZE; - immap->im_memctl.memc_pcibr1 = M82xx_PCI_SEC_WND_BASE | PCIBR_ENABLE; -#endif - - /* Enable PCI */ - immap->im_pci.pci_gcr = cpu_to_le32(PCIGCR_PCI_BUS_EN); - - pci_div = ( (sccr & SCCR_PCI_MODCK) ? 2 : 1) * - ( ( (sccr & SCCR_PCIDF_MSK) >> SCCR_PCIDF_SHIFT) + 1); - freq = (uint)((2*binfo->bi_cpmfreq)/(pci_div)); - time = (int)66666666/freq; - - /* due to PCI Local Bus spec, some devices needs to wait such a long - time after RST deassertion. More specifically, 0.508s for 66MHz & twice more for 33 */ - printk("%s: The PCI bus is %d Mhz.\nWaiting %s after deasserting RST...\n",__FILE__,freq, - (time==1) ? "0.5 seconds":"1 second" ); - - { - int i; - for(i=0;i<(500*time);i++) - udelay(1000); - } - - /* setup ATU registers */ - immap->im_pci.pci_pocmr0 = cpu_to_le32(POCMR_ENABLE | POCMR_PCI_IO | - ((~(M82xx_PCI_IO_SIZE - 1U)) >> POTA_ADDR_SHIFT)); - immap->im_pci.pci_potar0 = cpu_to_le32(M82xx_PCI_LOWER_IO >> POTA_ADDR_SHIFT); - immap->im_pci.pci_pobar0 = cpu_to_le32(M82xx_PCI_IO_BASE >> POTA_ADDR_SHIFT); - - /* Set-up non-prefetchable window */ - immap->im_pci.pci_pocmr1 = cpu_to_le32(POCMR_ENABLE | ((~(M82xx_PCI_MMIO_SIZE-1U)) >> POTA_ADDR_SHIFT)); - immap->im_pci.pci_potar1 = cpu_to_le32(M82xx_PCI_LOWER_MMIO >> POTA_ADDR_SHIFT); - immap->im_pci.pci_pobar1 = cpu_to_le32((M82xx_PCI_LOWER_MMIO - M82xx_PCI_MMIO_OFFSET) >> POTA_ADDR_SHIFT); - - /* Set-up prefetchable window */ - immap->im_pci.pci_pocmr2 = cpu_to_le32(POCMR_ENABLE |POCMR_PREFETCH_EN | - (~(M82xx_PCI_MEM_SIZE-1U) >> POTA_ADDR_SHIFT)); - immap->im_pci.pci_potar2 = cpu_to_le32(M82xx_PCI_LOWER_MEM >> POTA_ADDR_SHIFT); - immap->im_pci.pci_pobar2 = cpu_to_le32((M82xx_PCI_LOWER_MEM - M82xx_PCI_MEM_OFFSET) >> POTA_ADDR_SHIFT); - - /* Inbound transactions from PCI memory space */ - immap->im_pci.pci_picmr0 = cpu_to_le32(PICMR_ENABLE | PICMR_PREFETCH_EN | - ((~(M82xx_PCI_SLAVE_MEM_SIZE-1U)) >> PITA_ADDR_SHIFT)); - immap->im_pci.pci_pibar0 = cpu_to_le32(M82xx_PCI_SLAVE_MEM_BUS >> PITA_ADDR_SHIFT); - immap->im_pci.pci_pitar0 = cpu_to_le32(M82xx_PCI_SLAVE_MEM_LOCAL>> PITA_ADDR_SHIFT); - - /* park bus on PCI */ - immap->im_siu_conf.siu_82xx.sc_ppc_acr = PPC_ACR_BUS_PARK_PCI; - - /* Enable bus mastering and inbound memory transactions */ - early_read_config_dword(hose, hose->first_busno, 0, PCI_COMMAND, &val); - val &= 0xffff0000; - val |= PCI_COMMAND_MEMORY|PCI_COMMAND_MASTER; - early_write_config_dword(hose, hose->first_busno, 0, PCI_COMMAND, val); - -} - -void __init pq2_find_bridges(void) -{ - extern int pci_assign_all_buses; - struct pci_controller * hose; - int host_bridge; - - pci_assign_all_buses = 1; - - hose = pcibios_alloc_controller(); - - if (!hose) - return; - - ppc_md.pci_swizzle = common_swizzle; - - hose->first_busno = 0; - hose->bus_offset = 0; - hose->last_busno = 0xff; - - setup_m8260_indirect_pci(hose, - (unsigned long)&cpm2_immr->im_pci.pci_cfg_addr, - (unsigned long)&cpm2_immr->im_pci.pci_cfg_data); - - /* Make sure it is a supported bridge */ - early_read_config_dword(hose, - 0, - PCI_DEVFN(0,0), - PCI_VENDOR_ID, - &host_bridge); - switch (host_bridge) { - case PCI_DEVICE_ID_MPC8265: - break; - case PCI_DEVICE_ID_MPC8272: - break; - default: - printk("Attempting to use unrecognized host bridge ID" - " 0x%08x.\n", host_bridge); - break; - } - - pq2ads_setup_pci(hose); - - hose->io_space.start = M82xx_PCI_LOWER_IO; - hose->io_space.end = M82xx_PCI_UPPER_IO; - hose->mem_space.start = M82xx_PCI_LOWER_MEM; - hose->mem_space.end = M82xx_PCI_UPPER_MMIO; - hose->pci_mem_offset = M82xx_PCI_MEM_OFFSET; - - isa_io_base = - (unsigned long) ioremap(M82xx_PCI_IO_BASE, - M82xx_PCI_IO_SIZE); - hose->io_base_virt = (void *) isa_io_base; - - /* setup resources */ - pci_init_resource(&hose->mem_resources[0], - M82xx_PCI_LOWER_MEM, - M82xx_PCI_UPPER_MEM, - IORESOURCE_MEM|IORESOURCE_PREFETCH, "PCI prefetchable memory"); - - pci_init_resource(&hose->mem_resources[1], - M82xx_PCI_LOWER_MMIO, - M82xx_PCI_UPPER_MMIO, - IORESOURCE_MEM, "PCI memory"); - - pci_init_resource(&hose->io_resource, - M82xx_PCI_LOWER_IO, - M82xx_PCI_UPPER_IO, - IORESOURCE_IO | 1, "PCI I/O"); - - ppc_md.pci_exclude_device = pq2pci_exclude_device; - hose->last_busno = pciauto_bus_scan(hose, hose->first_busno); - - ppc_md.pci_map_irq = pq2pci_map_irq; - ppc_md.pcibios_fixup = NULL; - ppc_md.pcibios_fixup_bus = NULL; - -} |