| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Scott Murray | 1062 | 89.39% | 2 | 10.53% |
| Björn Helgaas | 54 | 4.55% | 2 | 10.53% |
| Greg Kroah-Hartman | 36 | 3.03% | 5 | 26.32% |
| Rolf Eike Beer | 9 | 0.76% | 1 | 5.26% |
| Quentin Lambert | 5 | 0.42% | 1 | 5.26% |
| Leann Ogasawara | 5 | 0.42% | 1 | 5.26% |
| Bogicevic Sasa | 4 | 0.34% | 1 | 5.26% |
| Rusty Russell | 4 | 0.34% | 2 | 10.53% |
| Linus Torvalds (pre-git) | 3 | 0.25% | 1 | 5.26% |
| Andrew Morton | 3 | 0.25% | 1 | 5.26% |
| Thomas Gleixner | 2 | 0.17% | 1 | 5.26% |
| Arvind Yadav | 1 | 0.08% | 1 | 5.26% |
| Total | 1188 | 19 |
// SPDX-License-Identifier: GPL-2.0+ /* * cpcihp_zt5550.c * * Intel/Ziatech ZT5550 CompactPCI Host Controller driver * * Copyright 2002 SOMA Networks, Inc. * Copyright 2001 Intel San Luis Obispo * Copyright 2000,2001 MontaVista Software Inc. * * Send feedback to <scottm@somanetworks.com> */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/errno.h> #include <linux/pci.h> #include <linux/interrupt.h> #include <linux/signal.h> /* IRQF_SHARED */ #include "cpci_hotplug.h" #include "cpcihp_zt5550.h" #define DRIVER_VERSION "0.2" #define DRIVER_AUTHOR "Scott Murray <scottm@somanetworks.com>" #define DRIVER_DESC "ZT5550 CompactPCI Hot Plug Driver" #define MY_NAME "cpcihp_zt5550" #define dbg(format, arg...) \ do { \ if (debug) \ printk(KERN_DEBUG "%s: " format "\n", \ MY_NAME, ## arg); \ } while (0) #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME, ## arg) #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME, ## arg) #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME, ## arg) /* local variables */ static bool debug; static bool poll; static struct cpci_hp_controller_ops zt5550_hpc_ops; static struct cpci_hp_controller zt5550_hpc; /* Primary cPCI bus bridge device */ static struct pci_dev *bus0_dev; static struct pci_bus *bus0; /* Host controller device */ static struct pci_dev *hc_dev; /* Host controller register addresses */ static void __iomem *hc_registers; static void __iomem *csr_hc_index; static void __iomem *csr_hc_data; static void __iomem *csr_int_status; static void __iomem *csr_int_mask; static int zt5550_hc_config(struct pci_dev *pdev) { int ret; /* Since we know that no boards exist with two HC chips, treat it as an error */ if (hc_dev) { err("too many host controller devices?"); return -EBUSY; } ret = pci_enable_device(pdev); if (ret) { err("cannot enable %s\n", pci_name(pdev)); return ret; } hc_dev = pdev; dbg("hc_dev = %p", hc_dev); dbg("pci resource start %llx", (unsigned long long)pci_resource_start(hc_dev, 1)); dbg("pci resource len %llx", (unsigned long long)pci_resource_len(hc_dev, 1)); if (!request_mem_region(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1), MY_NAME)) { err("cannot reserve MMIO region"); ret = -ENOMEM; goto exit_disable_device; } hc_registers = ioremap(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1)); if (!hc_registers) { err("cannot remap MMIO region %llx @ %llx", (unsigned long long)pci_resource_len(hc_dev, 1), (unsigned long long)pci_resource_start(hc_dev, 1)); ret = -ENODEV; goto exit_release_region; } csr_hc_index = hc_registers + CSR_HCINDEX; csr_hc_data = hc_registers + CSR_HCDATA; csr_int_status = hc_registers + CSR_INTSTAT; csr_int_mask = hc_registers + CSR_INTMASK; /* * Disable host control, fault and serial interrupts */ dbg("disabling host control, fault and serial interrupts"); writeb((u8) HC_INT_MASK_REG, csr_hc_index); writeb((u8) ALL_INDEXED_INTS_MASK, csr_hc_data); dbg("disabled host control, fault and serial interrupts"); /* * Disable timer0, timer1 and ENUM interrupts */ dbg("disabling timer0, timer1 and ENUM interrupts"); writeb((u8) ALL_DIRECT_INTS_MASK, csr_int_mask); dbg("disabled timer0, timer1 and ENUM interrupts"); return 0; exit_release_region: release_mem_region(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1)); exit_disable_device: pci_disable_device(hc_dev); return ret; } static int zt5550_hc_cleanup(void) { if (!hc_dev) return -ENODEV; iounmap(hc_registers); release_mem_region(pci_resource_start(hc_dev, 1), pci_resource_len(hc_dev, 1)); pci_disable_device(hc_dev); return 0; } static int zt5550_hc_query_enum(void) { u8 value; value = inb_p(ENUM_PORT); return ((value & ENUM_MASK) == ENUM_MASK); } static int zt5550_hc_check_irq(void *dev_id) { int ret; u8 reg; ret = 0; if (dev_id == zt5550_hpc.dev_id) { reg = readb(csr_int_status); if (reg) ret = 1; } return ret; } static int zt5550_hc_enable_irq(void) { u8 reg; if (hc_dev == NULL) return -ENODEV; reg = readb(csr_int_mask); reg = reg & ~ENUM_INT_MASK; writeb(reg, csr_int_mask); return 0; } static int zt5550_hc_disable_irq(void) { u8 reg; if (hc_dev == NULL) return -ENODEV; reg = readb(csr_int_mask); reg = reg | ENUM_INT_MASK; writeb(reg, csr_int_mask); return 0; } static int zt5550_hc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) { int status; status = zt5550_hc_config(pdev); if (status != 0) return status; dbg("returned from zt5550_hc_config"); memset(&zt5550_hpc, 0, sizeof(struct cpci_hp_controller)); zt5550_hpc_ops.query_enum = zt5550_hc_query_enum; zt5550_hpc.ops = &zt5550_hpc_ops; if (!poll) { zt5550_hpc.irq = hc_dev->irq; zt5550_hpc.irq_flags = IRQF_SHARED; zt5550_hpc.dev_id = hc_dev; zt5550_hpc_ops.enable_irq = zt5550_hc_enable_irq; zt5550_hpc_ops.disable_irq = zt5550_hc_disable_irq; zt5550_hpc_ops.check_irq = zt5550_hc_check_irq; } else { info("using ENUM# polling mode"); } status = cpci_hp_register_controller(&zt5550_hpc); if (status != 0) { err("could not register cPCI hotplug controller"); goto init_hc_error; } dbg("registered controller"); /* Look for first device matching cPCI bus's bridge vendor and device IDs */ bus0_dev = pci_get_device(PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21154, NULL); if (!bus0_dev) { status = -ENODEV; goto init_register_error; } bus0 = bus0_dev->subordinate; pci_dev_put(bus0_dev); status = cpci_hp_register_bus(bus0, 0x0a, 0x0f); if (status != 0) { err("could not register cPCI hotplug bus"); goto init_register_error; } dbg("registered bus"); status = cpci_hp_start(); if (status != 0) { err("could not started cPCI hotplug system"); cpci_hp_unregister_bus(bus0); goto init_register_error; } dbg("started cpci hp system"); return 0; init_register_error: cpci_hp_unregister_controller(&zt5550_hpc); init_hc_error: err("status = %d", status); zt5550_hc_cleanup(); return status; } static void zt5550_hc_remove_one(struct pci_dev *pdev) { cpci_hp_stop(); cpci_hp_unregister_bus(bus0); cpci_hp_unregister_controller(&zt5550_hpc); zt5550_hc_cleanup(); } static const struct pci_device_id zt5550_hc_pci_tbl[] = { { PCI_VENDOR_ID_ZIATECH, PCI_DEVICE_ID_ZIATECH_5550_HC, PCI_ANY_ID, PCI_ANY_ID, }, { 0, } }; MODULE_DEVICE_TABLE(pci, zt5550_hc_pci_tbl); static struct pci_driver zt5550_hc_driver = { .name = "zt5550_hc", .id_table = zt5550_hc_pci_tbl, .probe = zt5550_hc_init_one, .remove = zt5550_hc_remove_one, }; static int __init zt5550_init(void) { struct resource *r; int rc; info(DRIVER_DESC " version: " DRIVER_VERSION); r = request_region(ENUM_PORT, 1, "#ENUM hotswap signal register"); if (!r) return -EBUSY; rc = pci_register_driver(&zt5550_hc_driver); if (rc < 0) release_region(ENUM_PORT, 1); return rc; } static void __exit zt5550_exit(void) { pci_unregister_driver(&zt5550_hc_driver); release_region(ENUM_PORT, 1); } module_init(zt5550_init); module_exit(zt5550_exit); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); module_param(debug, bool, 0644); MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); module_param(poll, bool, 0644); MODULE_PARM_DESC(poll, "#ENUM polling mode enabled or not");