cregit-Linux how code gets into the kernel

Release 4.11 arch/arm/mach-pxa/cm-x2xx-pci.c

/*
 * linux/arch/arm/mach-pxa/cm-x2xx-pci.c
 *
 * PCI bios-type initialisation for PCI machines
 *
 * Bits taken from various places.
 *
 * Copyright (C) 2007, 2008 Compulab, Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/gpio.h>

#include <asm/mach/pci.h>
#include <asm/mach-types.h>

#include <asm/hardware/it8152.h>


void __iomem *it8152_base_address;

static int cmx2xx_it8152_irq_gpio;


static void cmx2xx_it8152_irq_demux(struct irq_desc *desc) { /* clear our parent irq */ desc->irq_data.chip->irq_ack(&desc->irq_data); it8152_irq_demux(desc); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport2064.52%250.00%
Lennert Buytenhek722.58%125.00%
Eric Miao412.90%125.00%
Total31100.00%4100.00%


void __cmx2xx_pci_init_irq(int irq_gpio) { it8152_init_irq(); cmx2xx_it8152_irq_gpio = irq_gpio; irq_set_irq_type(gpio_to_irq(irq_gpio), IRQ_TYPE_EDGE_RISING); irq_set_chained_handler(gpio_to_irq(irq_gpio), cmx2xx_it8152_irq_demux); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport3291.43%360.00%
Thomas Gleixner25.71%120.00%
Dmitry Baryshkov12.86%120.00%
Total35100.00%5100.00%

#ifdef CONFIG_PM static unsigned long sleep_save_ite[10];
void __cmx2xx_pci_suspend(void) { /* save ITE state */ sleep_save_ite[0] = __raw_readl(IT8152_INTC_PDCNIMR); sleep_save_ite[1] = __raw_readl(IT8152_INTC_LPCNIMR); sleep_save_ite[2] = __raw_readl(IT8152_INTC_LPNIAR); /* Clear ITE IRQ's */ __raw_writel((0), IT8152_INTC_PDCNIRR); __raw_writel((0), IT8152_INTC_LPCNIRR); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport57100.00%2100.00%
Total57100.00%2100.00%


void __cmx2xx_pci_resume(void) { /* restore IT8152 state */ __raw_writel((sleep_save_ite[0]), IT8152_INTC_PDCNIMR); __raw_writel((sleep_save_ite[1]), IT8152_INTC_LPCNIMR); __raw_writel((sleep_save_ite[2]), IT8152_INTC_LPNIAR); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport44100.00%2100.00%
Total44100.00%2100.00%

#else
void cmx2xx_pci_suspend(void) {}

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport6100.00%2100.00%
Total6100.00%2100.00%


void cmx2xx_pci_resume(void) {}

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport6100.00%2100.00%
Total6100.00%2100.00%

#endif /* PCI IRQ mapping*/
static int __init cmx2xx_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { int irq; dev_dbg(&dev->dev, "%s: slot=%x, pin=%x\n", __func__, slot, pin); irq = it8152_pci_map_irq(dev, slot, pin); if (irq) return irq; /* Here comes the ugly part. The routing is baseboard specific, but defining a platform for each possible base of CM-X2XX is unrealistic. Here we keep mapping for ATXBase and SB-X2XX. */ /* ATXBASE PCI slot */ if (slot == 7) return IT8152_PCI_INTA; /* ATXBase/SB-X2XX CardBus */ if (slot == 8 || slot == 0) return IT8152_PCI_INTB; /* ATXBase Ethernet */ if (slot == 9) return IT8152_PCI_INTA; /* CM-x255 Onboard Ethernet */ if (slot == 15) return IT8152_PCI_INTC; /* SB-x2xx Ethernet */ if (slot == 16) return IT8152_PCI_INTA; /* PC104+ interrupt routing */ if ((slot == 17) || (slot == 19)) return IT8152_PCI_INTA; if ((slot == 18) || (slot == 20)) return IT8152_PCI_INTB; return(0); }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport14998.68%466.67%
Ralf Bächle10.66%116.67%
Harvey Harrison10.66%116.67%
Total151100.00%6100.00%


static void cmx2xx_pci_preinit(void) { pr_info("Initializing CM-X2XX PCI subsystem\n"); pcibios_min_io = 0; pcibios_min_mem = 0; __raw_writel(0x800, IT8152_PCI_CFG_ADDR); if (__raw_readl(IT8152_PCI_CFG_DATA) == 0x81521283) { pr_info("PCI Bridge found.\n"); /* set PCI I/O base at 0 */ writel(0x848, IT8152_PCI_CFG_ADDR); writel(0, IT8152_PCI_CFG_DATA); /* set PCI memory base at 0 */ writel(0x840, IT8152_PCI_CFG_ADDR); writel(0, IT8152_PCI_CFG_DATA); writel(0x20, IT8152_GPIO_GPDR); /* CardBus Controller on ATXbase baseboard */ writel(0x4000, IT8152_PCI_CFG_ADDR); if (readl(IT8152_PCI_CFG_DATA) == 0xAC51104C) { pr_info("CardBus Bridge found.\n"); /* Configure socket 0 */ writel(0x408C, IT8152_PCI_CFG_ADDR); writel(0x1022, IT8152_PCI_CFG_DATA); writel(0x4080, IT8152_PCI_CFG_ADDR); writel(0x3844d060, IT8152_PCI_CFG_DATA); writel(0x4090, IT8152_PCI_CFG_ADDR); writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) | 0x60440000), IT8152_PCI_CFG_DATA); writel(0x4018, IT8152_PCI_CFG_ADDR); writel(0xb0000000, IT8152_PCI_CFG_DATA); /* Configure socket 1 */ writel(0x418C, IT8152_PCI_CFG_ADDR); writel(0x1022, IT8152_PCI_CFG_DATA); writel(0x4180, IT8152_PCI_CFG_ADDR); writel(0x3844d060, IT8152_PCI_CFG_DATA); writel(0x4190, IT8152_PCI_CFG_ADDR); writel(((readl(IT8152_PCI_CFG_DATA) & 0xffff) | 0x60440000), IT8152_PCI_CFG_DATA); writel(0x4118, IT8152_PCI_CFG_ADDR); writel(0xb0000000, IT8152_PCI_CFG_DATA); } } }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport23396.68%375.00%
Rob Herring83.32%125.00%
Total241100.00%4100.00%

static struct hw_pci cmx2xx_pci __initdata = { .map_irq = cmx2xx_pci_map_irq, .nr_controllers = 1, .ops = &it8152_ops, .setup = it8152_pci_setup, .preinit = cmx2xx_pci_preinit, };
static int __init cmx2xx_init_pci(void) { if (machine_is_armcore()) pci_common_init(&cmx2xx_pci); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport23100.00%2100.00%
Total23100.00%2100.00%

subsys_initcall(cmx2xx_init_pci);

Overall Contributors

PersonTokensPropCommitsCommitProp
Mike Rapoport65795.36%535.71%
Rob Herring81.16%17.14%
Lennert Buytenhek71.02%17.14%
Russell King50.73%17.14%
Eric Miao40.58%17.14%
Arnd Bergmann30.44%17.14%
Thomas Gleixner20.29%17.14%
Harvey Harrison10.15%17.14%
Dmitry Baryshkov10.15%17.14%
Ralf Bächle10.15%17.14%
Total689100.00%14100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.