// SPDX-License-Identifier: GPL-2.0-or-later /* * Support for the Tundra TSI148 VME-PCI Bridge Chip * * Author: Martyn Welch <[email protected]> * Copyright 2008 GE Intelligent Platforms Embedded Systems, Inc. * * Based on work by Tom Armistead and Ajit Prem * Copyright 2004 Motorola Inc. */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/mm.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/proc_fs.h> #include <linux/pci.h> #include <linux/poll.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/io.h> #include <linux/uaccess.h> #include <linux/byteorder/generic.h> #include "vme.h" #include "vme_bridge.h" #include "vme_tsi148.h" static int tsi148_probe(struct pci_dev *, const struct pci_device_id *); static void tsi148_remove(struct pci_dev *); /* Module parameter */ static bool err_chk; static u32 geoid; static const char driver_name[] = …; static const struct pci_device_id tsi148_ids[] = …; MODULE_DEVICE_TABLE(pci, tsi148_ids); static struct pci_driver tsi148_driver = …; static void reg_join(unsigned int high, unsigned int low, unsigned long long *variable) { … } static void reg_split(unsigned long long variable, unsigned int *high, unsigned int *low) { … } /* * Wakes up DMA queue. */ static u32 tsi148_DMA_irqhandler(struct tsi148_driver *bridge, int channel_mask) { … } /* * Wake up location monitor queue */ static u32 tsi148_LM_irqhandler(struct tsi148_driver *bridge, u32 stat) { … } /* * Wake up mail box queue. * * XXX This functionality is not exposed up though API. */ static u32 tsi148_MB_irqhandler(struct vme_bridge *tsi148_bridge, u32 stat) { … } /* * Display error & status message when PERR (PCI) exception interrupt occurs. */ static u32 tsi148_PERR_irqhandler(struct vme_bridge *tsi148_bridge) { … } /* * Save address and status when VME error interrupt occurs. */ static u32 tsi148_VERR_irqhandler(struct vme_bridge *tsi148_bridge) { … } /* * Wake up IACK queue. */ static u32 tsi148_IACK_irqhandler(struct tsi148_driver *bridge) { … } /* * Calling VME bus interrupt callback if provided. */ static u32 tsi148_VIRQ_irqhandler(struct vme_bridge *tsi148_bridge, u32 stat) { … } /* * Top level interrupt handler. Clears appropriate interrupt status bits and * then calls appropriate sub handler(s). */ static irqreturn_t tsi148_irqhandler(int irq, void *ptr) { … } static int tsi148_irq_init(struct vme_bridge *tsi148_bridge) { … } static void tsi148_irq_exit(struct vme_bridge *tsi148_bridge, struct pci_dev *pdev) { … } /* * Check to see if an IACk has been received, return true (1) or false (0). */ static int tsi148_iack_received(struct tsi148_driver *bridge) { … } /* * Configure VME interrupt */ static void tsi148_irq_set(struct vme_bridge *tsi148_bridge, int level, int state, int sync) { … } /* * Generate a VME bus interrupt at the requested level & vector. Wait for * interrupt to be acked. */ static int tsi148_irq_generate(struct vme_bridge *tsi148_bridge, int level, int statid) { … } /* * Initialize a slave window with the requested attributes. */ static int tsi148_slave_set(struct vme_slave_resource *image, int enabled, unsigned long long vme_base, unsigned long long size, dma_addr_t pci_base, u32 aspace, u32 cycle) { … } /* * Get slave window configuration. */ static int tsi148_slave_get(struct vme_slave_resource *image, int *enabled, unsigned long long *vme_base, unsigned long long *size, dma_addr_t *pci_base, u32 *aspace, u32 *cycle) { … } /* * Allocate and map PCI Resource */ static int tsi148_alloc_resource(struct vme_master_resource *image, unsigned long long size) { … } /* * Free and unmap PCI Resource */ static void tsi148_free_resource(struct vme_master_resource *image) { … } /* * Set the attributes of an outbound window. */ static int tsi148_master_set(struct vme_master_resource *image, int enabled, unsigned long long vme_base, unsigned long long size, u32 aspace, u32 cycle, u32 dwidth) { … } /* * Set the attributes of an outbound window. * * XXX Not parsing prefetch information. */ static int __tsi148_master_get(struct vme_master_resource *image, int *enabled, unsigned long long *vme_base, unsigned long long *size, u32 *aspace, u32 *cycle, u32 *dwidth) { … } static int tsi148_master_get(struct vme_master_resource *image, int *enabled, unsigned long long *vme_base, unsigned long long *size, u32 *aspace, u32 *cycle, u32 *dwidth) { … } static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf, size_t count, loff_t offset) { … } static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf, size_t count, loff_t offset) { … } /* * Perform an RMW cycle on the VME bus. * * Requires a previously configured master window, returns final value. */ static unsigned int tsi148_master_rmw(struct vme_master_resource *image, unsigned int mask, unsigned int compare, unsigned int swap, loff_t offset) { … } static int tsi148_dma_set_vme_src_attributes(struct device *dev, __be32 *attr, u32 aspace, u32 cycle, u32 dwidth) { … } static int tsi148_dma_set_vme_dest_attributes(struct device *dev, __be32 *attr, u32 aspace, u32 cycle, u32 dwidth) { … } /* * Add a link list descriptor to the list * * Note: DMA engine expects the DMA descriptor to be big endian. */ static int tsi148_dma_list_add(struct vme_dma_list *list, struct vme_dma_attr *src, struct vme_dma_attr *dest, size_t count) { … } /* * Check to see if the provided DMA channel is busy. */ static int tsi148_dma_busy(struct vme_bridge *tsi148_bridge, int channel) { … } /* * Execute a previously generated link list * * XXX Need to provide control register configuration. */ static int tsi148_dma_list_exec(struct vme_dma_list *list) { … } /* * Clean up a previously generated link list * * We have a separate function, don't assume that the chain can't be reused. */ static int tsi148_dma_list_empty(struct vme_dma_list *list) { … } /* * All 4 location monitors reside at the same base - this is therefore a * system wide configuration. * * This does not enable the LM monitor - that should be done when the first * callback is attached and disabled when the last callback is removed. */ static int tsi148_lm_set(struct vme_lm_resource *lm, unsigned long long lm_base, u32 aspace, u32 cycle) { … } /* Get configuration of the callback monitor and return whether it is enabled * or disabled. */ static int tsi148_lm_get(struct vme_lm_resource *lm, unsigned long long *lm_base, u32 *aspace, u32 *cycle) { … } /* * Attach a callback to a specific location monitor. * * Callback will be passed the monitor triggered. */ static int tsi148_lm_attach(struct vme_lm_resource *lm, int monitor, void (*callback)(void *), void *data) { … } /* * Detach a callback function forn a specific location monitor. */ static int tsi148_lm_detach(struct vme_lm_resource *lm, int monitor) { … } /* * Determine Geographical Addressing */ static int tsi148_slot_get(struct vme_bridge *tsi148_bridge) { … } static void *tsi148_alloc_consistent(struct device *parent, size_t size, dma_addr_t *dma) { … } static void tsi148_free_consistent(struct device *parent, size_t size, void *vaddr, dma_addr_t dma) { … } /* * Configure CR/CSR space * * Access to the CR/CSR can be configured at power-up. The location of the * CR/CSR registers in the CR/CSR address space is determined by the boards * Auto-ID or Geographic address. This function ensures that the window is * enabled at an offset consistent with the boards geopgraphic address. * * Each board has a 512kB window, with the highest 4kB being used for the * boards registers, this means there is a fix length 508kB window which must * be mapped onto PCI memory. */ static int tsi148_crcsr_init(struct vme_bridge *tsi148_bridge, struct pci_dev *pdev) { … } static void tsi148_crcsr_exit(struct vme_bridge *tsi148_bridge, struct pci_dev *pdev) { … } static int tsi148_probe(struct pci_dev *pdev, const struct pci_device_id *id) { … } static void tsi148_remove(struct pci_dev *pdev) { … } module_pci_driver(…) …; MODULE_PARM_DESC(…) …; module_param(err_chk, bool, 0); MODULE_PARM_DESC(…) …; module_param(geoid, uint, 0); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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