1a59d1b8e05ea (Thomas Gleixner 2019-05-27 08:55:05 +0200 1) // SPDX-License-Identifier: GPL-2.0-or-later
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 2) /*
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 3) * nosy - Snoop mode driver for TI PCILynx 1394 controllers
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 4) * Copyright (C) 2002-2007 Kristian Høgsberg
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 5) */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 6)
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 7) #include <linux/device.h>
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 8) #include <linux/errno.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 9) #include <linux/fs.h>
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 10) #include <linux/init.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 11) #include <linux/interrupt.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 12) #include <linux/io.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 13) #include <linux/kernel.h>
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 14) #include <linux/kref.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 15) #include <linux/miscdevice.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 16) #include <linux/module.h>
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 17) #include <linux/mutex.h>
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 18) #include <linux/pci.h>
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 19) #include <linux/poll.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 20) #include <linux/sched.h> /* required for linux/wait.h */
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 21) #include <linux/slab.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 22) #include <linux/spinlock.h>
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 23) #include <linux/time64.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 24) #include <linux/timex.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 25) #include <linux/uaccess.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 26) #include <linux/wait.h>
e894d1d7fd8cf (santosh nayak 2012-02-21 15:38:13 +0530 27) #include <linux/dma-mapping.h>
60063497a95e7 (Arun Sharma 2011-07-26 16:09:06 -0700 28) #include <linux/atomic.h>
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 29) #include <asm/byteorder.h>
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 30)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 31) #include "nosy.h"
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 32) #include "nosy-user.h"
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 33)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 34) #define TCODE_PHY_PACKET 0x10
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 35) #define PCI_DEVICE_ID_TI_PCILYNX 0x8000
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 36)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 37) static char driver_name[] = KBUILD_MODNAME;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 38)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 39) /* this is the physical layout of a PCL, its size is 128 bytes */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 40) struct pcl {
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 41) __le32 next;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 42) __le32 async_error_next;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 43) u32 user_data;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 44) __le32 pcl_status;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 45) __le32 remaining_transfer_count;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 46) __le32 next_data_buffer;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 47) struct {
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 48) __le32 control;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 49) __le32 pointer;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 50) } buffer[13];
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 51) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 52)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 53) struct packet {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 54) unsigned int length;
c38e7e212acdb (Gustavo A. R. Silva 2020-05-28 09:35:11 -0500 55) char data[];
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 56) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 57)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 58) struct packet_buffer {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 59) char *data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 60) size_t capacity;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 61) long total_packet_count, lost_packet_count;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 62) atomic_t size;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 63) struct packet *head, *tail;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 64) wait_queue_head_t wait;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 65) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 66)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 67) struct pcilynx {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 68) struct pci_dev *pci_device;
c89db7b8bc88d (Stefan Richter 2010-07-22 11:56:38 +0200 69) __iomem char *registers;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 70)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 71) struct pcl *rcv_start_pcl, *rcv_pcl;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 72) __le32 *rcv_buffer;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 73)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 74) dma_addr_t rcv_start_pcl_bus, rcv_pcl_bus, rcv_buffer_bus;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 75)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 76) spinlock_t client_list_lock;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 77) struct list_head client_list;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 78)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 79) struct miscdevice misc;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 80) struct list_head link;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 81) struct kref kref;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 82) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 83)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 84) static inline struct pcilynx *
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 85) lynx_get(struct pcilynx *lynx)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 86) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 87) kref_get(&lynx->kref);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 88)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 89) return lynx;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 90) }
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 91)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 92) static void
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 93) lynx_release(struct kref *kref)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 94) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 95) kfree(container_of(kref, struct pcilynx, kref));
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 96) }
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 97)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 98) static inline void
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 99) lynx_put(struct pcilynx *lynx)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 100) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 101) kref_put(&lynx->kref, lynx_release);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 102) }
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 103)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 104) struct client {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 105) struct pcilynx *lynx;
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 106) u32 tcode_mask;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 107) struct packet_buffer buffer;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 108) struct list_head link;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 109) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 110)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 111) static DEFINE_MUTEX(card_mutex);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 112) static LIST_HEAD(card_list);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 113)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 114) static int
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 115) packet_buffer_init(struct packet_buffer *buffer, size_t capacity)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 116) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 117) buffer->data = kmalloc(capacity, GFP_KERNEL);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 118) if (buffer->data == NULL)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 119) return -ENOMEM;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 120) buffer->head = (struct packet *) buffer->data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 121) buffer->tail = (struct packet *) buffer->data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 122) buffer->capacity = capacity;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 123) buffer->lost_packet_count = 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 124) atomic_set(&buffer->size, 0);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 125) init_waitqueue_head(&buffer->wait);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 126)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 127) return 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 128) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 129)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 130) static void
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 131) packet_buffer_destroy(struct packet_buffer *buffer)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 132) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 133) kfree(buffer->data);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 134) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 135)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 136) static int
c89db7b8bc88d (Stefan Richter 2010-07-22 11:56:38 +0200 137) packet_buffer_get(struct client *client, char __user *data, size_t user_length)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 138) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 139) struct packet_buffer *buffer = &client->buffer;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 140) size_t length;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 141) char *end;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 142)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 143) if (wait_event_interruptible(buffer->wait,
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 144) atomic_read(&buffer->size) > 0) ||
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 145) list_empty(&client->lynx->link))
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 146) return -ERESTARTSYS;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 147)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 148) if (atomic_read(&buffer->size) == 0)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 149) return -ENODEV;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 150)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 151) /* FIXME: Check length <= user_length. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 152)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 153) end = buffer->data + buffer->capacity;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 154) length = buffer->head->length;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 155)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 156) if (&buffer->head->data[length] < end) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 157) if (copy_to_user(data, buffer->head->data, length))
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 158) return -EFAULT;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 159) buffer->head = (struct packet *) &buffer->head->data[length];
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 160) } else {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 161) size_t split = end - buffer->head->data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 162)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 163) if (copy_to_user(data, buffer->head->data, split))
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 164) return -EFAULT;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 165) if (copy_to_user(data + split, buffer->data, length - split))
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 166) return -EFAULT;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 167) buffer->head = (struct packet *) &buffer->data[length - split];
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 168) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 169)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 170) /*
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 171) * Decrease buffer->size as the last thing, since this is what
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 172) * keeps the interrupt from overwriting the packet we are
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 173) * retrieving from the buffer.
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 174) */
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 175) atomic_sub(sizeof(struct packet) + length, &buffer->size);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 176)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 177) return length;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 178) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 179)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 180) static void
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 181) packet_buffer_put(struct packet_buffer *buffer, void *data, size_t length)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 182) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 183) char *end;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 184)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 185) buffer->total_packet_count++;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 186)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 187) if (buffer->capacity <
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 188) atomic_read(&buffer->size) + sizeof(struct packet) + length) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 189) buffer->lost_packet_count++;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 190) return;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 191) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 192)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 193) end = buffer->data + buffer->capacity;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 194) buffer->tail->length = length;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 195)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 196) if (&buffer->tail->data[length] < end) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 197) memcpy(buffer->tail->data, data, length);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 198) buffer->tail = (struct packet *) &buffer->tail->data[length];
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 199) } else {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 200) size_t split = end - buffer->tail->data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 201)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 202) memcpy(buffer->tail->data, data, split);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 203) memcpy(buffer->data, data + split, length - split);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 204) buffer->tail = (struct packet *) &buffer->data[length - split];
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 205) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 206)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 207) /* Finally, adjust buffer size and wake up userspace reader. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 208)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 209) atomic_add(sizeof(struct packet) + length, &buffer->size);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 210) wake_up_interruptible(&buffer->wait);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 211) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 212)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 213) static inline void
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 214) reg_write(struct pcilynx *lynx, int offset, u32 data)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 215) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 216) writel(data, lynx->registers + offset);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 217) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 218)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 219) static inline u32
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 220) reg_read(struct pcilynx *lynx, int offset)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 221) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 222) return readl(lynx->registers + offset);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 223) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 224)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 225) static inline void
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 226) reg_set_bits(struct pcilynx *lynx, int offset, u32 mask)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 227) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 228) reg_write(lynx, offset, (reg_read(lynx, offset) | mask));
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 229) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 230)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 231) /*
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 232) * Maybe the pcl programs could be set up to just append data instead
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 233) * of using a whole packet.
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 234) */
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 235) static inline void
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 236) run_pcl(struct pcilynx *lynx, dma_addr_t pcl_bus,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 237) int dmachan)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 238) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 239) reg_write(lynx, DMA0_CURRENT_PCL + dmachan * 0x20, pcl_bus);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 240) reg_write(lynx, DMA0_CHAN_CTRL + dmachan * 0x20,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 241) DMA_CHAN_CTRL_ENABLE | DMA_CHAN_CTRL_LINK);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 242) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 243)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 244) static int
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 245) set_phy_reg(struct pcilynx *lynx, int addr, int val)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 246) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 247) if (addr > 15) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 248) dev_err(&lynx->pci_device->dev,
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 249) "PHY register address %d out of range\n", addr);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 250) return -1;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 251) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 252) if (val > 0xff) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 253) dev_err(&lynx->pci_device->dev,
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 254) "PHY register value %d out of range\n", val);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 255) return -1;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 256) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 257) reg_write(lynx, LINK_PHY, LINK_PHY_WRITE |
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 258) LINK_PHY_ADDR(addr) | LINK_PHY_WDATA(val));
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 259)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 260) return 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 261) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 262)
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 263) static int
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 264) nosy_open(struct inode *inode, struct file *file)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 265) {
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 266) int minor = iminor(inode);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 267) struct client *client;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 268) struct pcilynx *tmp, *lynx = NULL;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 269)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 270) mutex_lock(&card_mutex);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 271) list_for_each_entry(tmp, &card_list, link)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 272) if (tmp->misc.minor == minor) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 273) lynx = lynx_get(tmp);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 274) break;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 275) }
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 276) mutex_unlock(&card_mutex);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 277) if (lynx == NULL)
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 278) return -ENODEV;
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 279)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 280) client = kmalloc(sizeof *client, GFP_KERNEL);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 281) if (client == NULL)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 282) goto fail;
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 283)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 284) client->tcode_mask = ~0;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 285) client->lynx = lynx;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 286) INIT_LIST_HEAD(&client->link);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 287)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 288) if (packet_buffer_init(&client->buffer, 128 * 1024) < 0)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 289) goto fail;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 290)
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 291) file->private_data = client;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 292)
c5bf68fe0c86a (Kirill Smelkov 2019-03-26 23:51:19 +0300 293) return stream_open(inode, file);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 294) fail:
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 295) kfree(client);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 296) lynx_put(lynx);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 297)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 298) return -ENOMEM;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 299) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 300)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 301) static int
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 302) nosy_release(struct inode *inode, struct file *file)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 303) {
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 304) struct client *client = file->private_data;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 305) struct pcilynx *lynx = client->lynx;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 306)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 307) spin_lock_irq(&lynx->client_list_lock);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 308) list_del_init(&client->link);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 309) spin_unlock_irq(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 310)
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 311) packet_buffer_destroy(&client->buffer);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 312) kfree(client);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 313) lynx_put(lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 314)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 315) return 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 316) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 317)
afc9a42b7464f (Al Viro 2017-07-03 06:39:46 -0400 318) static __poll_t
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 319) nosy_poll(struct file *file, poll_table *pt)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 320) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 321) struct client *client = file->private_data;
afc9a42b7464f (Al Viro 2017-07-03 06:39:46 -0400 322) __poll_t ret = 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 323)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 324) poll_wait(file, &client->buffer.wait, pt);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 325)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 326) if (atomic_read(&client->buffer.size) > 0)
a9a08845e9acb (Linus Torvalds 2018-02-11 14:34:03 -0800 327) ret = EPOLLIN | EPOLLRDNORM;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 328)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 329) if (list_empty(&client->lynx->link))
a9a08845e9acb (Linus Torvalds 2018-02-11 14:34:03 -0800 330) ret |= EPOLLHUP;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 331)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 332) return ret;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 333) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 334)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 335) static ssize_t
c89db7b8bc88d (Stefan Richter 2010-07-22 11:56:38 +0200 336) nosy_read(struct file *file, char __user *buffer, size_t count, loff_t *offset)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 337) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 338) struct client *client = file->private_data;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 339)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 340) return packet_buffer_get(client, buffer, count);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 341) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 342)
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 343) static long
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 344) nosy_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 345) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 346) struct client *client = file->private_data;
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 347) spinlock_t *client_list_lock = &client->lynx->client_list_lock;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 348) struct nosy_stats stats;
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 349) int ret;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 350)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 351) switch (cmd) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 352) case NOSY_IOC_GET_STATS:
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 353) spin_lock_irq(client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 354) stats.total_packet_count = client->buffer.total_packet_count;
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 355) stats.lost_packet_count = client->buffer.lost_packet_count;
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 356) spin_unlock_irq(client_list_lock);
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 357)
c89db7b8bc88d (Stefan Richter 2010-07-22 11:56:38 +0200 358) if (copy_to_user((void __user *) arg, &stats, sizeof stats))
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 359) return -EFAULT;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 360) else
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 361) return 0;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 362)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 363) case NOSY_IOC_START:
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 364) ret = -EBUSY;
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 365) spin_lock_irq(client_list_lock);
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 366) if (list_empty(&client->link)) {
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 367) list_add_tail(&client->link, &client->lynx->client_list);
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 368) ret = 0;
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 369) }
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 370) spin_unlock_irq(client_list_lock);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 371)
829933ef05a95 (Zheyu Ma 2021-04-03 06:58:36 +0000 372) return ret;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 373)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 374) case NOSY_IOC_STOP:
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 375) spin_lock_irq(client_list_lock);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 376) list_del_init(&client->link);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 377) spin_unlock_irq(client_list_lock);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 378)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 379) return 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 380)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 381) case NOSY_IOC_FILTER:
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 382) spin_lock_irq(client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 383) client->tcode_mask = arg;
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 384) spin_unlock_irq(client_list_lock);
55e77c06c6017 (Stefan Richter 2010-07-22 11:56:38 +0200 385)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 386) return 0;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 387)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 388) default:
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 389) return -EINVAL;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 390) /* Flush buffer, configure filter. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 391) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 392) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 393)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 394) static const struct file_operations nosy_ops = {
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 395) .owner = THIS_MODULE,
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 396) .read = nosy_read,
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 397) .unlocked_ioctl = nosy_ioctl,
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 398) .poll = nosy_poll,
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 399) .open = nosy_open,
c7b2a99c66e7b (Stefan Richter 2010-07-22 11:56:38 +0200 400) .release = nosy_release,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 401) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 402)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 403) #define PHY_PACKET_SIZE 12 /* 1 payload, 1 inverse, 1 ack = 3 quadlets */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 404)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 405) static void
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 406) packet_irq_handler(struct pcilynx *lynx)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 407) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 408) struct client *client;
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 409) u32 tcode_mask, tcode, timestamp;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 410) size_t length;
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 411) struct timespec64 ts64;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 412)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 413) /* FIXME: Also report rcv_speed. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 414)
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 415) length = __le32_to_cpu(lynx->rcv_pcl->pcl_status) & 0x00001fff;
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 416) tcode = __le32_to_cpu(lynx->rcv_buffer[1]) >> 4 & 0xf;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 417)
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 418) ktime_get_real_ts64(&ts64);
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 419) timestamp = ts64.tv_nsec / NSEC_PER_USEC;
2ae4b6b20e200 (Amitoj Kaur Chawla 2015-10-22 04:05:00 +0530 420) lynx->rcv_buffer[0] = (__force __le32)timestamp;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 421)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 422) if (length == PHY_PACKET_SIZE)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 423) tcode_mask = 1 << TCODE_PHY_PACKET;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 424) else
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 425) tcode_mask = 1 << tcode;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 426)
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 427) spin_lock(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 428)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 429) list_for_each_entry(client, &lynx->client_list, link)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 430) if (client->tcode_mask & tcode_mask)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 431) packet_buffer_put(&client->buffer,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 432) lynx->rcv_buffer, length + 4);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 433)
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 434) spin_unlock(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 435) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 436)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 437) static void
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 438) bus_reset_irq_handler(struct pcilynx *lynx)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 439) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 440) struct client *client;
384fbb96f9268 (Tina Ruchandani 2016-03-20 22:59:11 -0700 441) struct timespec64 ts64;
384fbb96f9268 (Tina Ruchandani 2016-03-20 22:59:11 -0700 442) u32 timestamp;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 443)
384fbb96f9268 (Tina Ruchandani 2016-03-20 22:59:11 -0700 444) ktime_get_real_ts64(&ts64);
384fbb96f9268 (Tina Ruchandani 2016-03-20 22:59:11 -0700 445) timestamp = ts64.tv_nsec / NSEC_PER_USEC;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 446)
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 447) spin_lock(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 448)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 449) list_for_each_entry(client, &lynx->client_list, link)
384fbb96f9268 (Tina Ruchandani 2016-03-20 22:59:11 -0700 450) packet_buffer_put(&client->buffer, ×tamp, 4);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 451)
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 452) spin_unlock(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 453) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 454)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 455) static irqreturn_t
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 456) irq_handler(int irq, void *device)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 457) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 458) struct pcilynx *lynx = device;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 459) u32 pci_int_status;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 460)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 461) pci_int_status = reg_read(lynx, PCI_INT_STATUS);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 462)
165476671f731 (Stefan Richter 2010-07-22 11:56:38 +0200 463) if (pci_int_status == ~0)
165476671f731 (Stefan Richter 2010-07-22 11:56:38 +0200 464) /* Card was ejected. */
165476671f731 (Stefan Richter 2010-07-22 11:56:38 +0200 465) return IRQ_NONE;
165476671f731 (Stefan Richter 2010-07-22 11:56:38 +0200 466)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 467) if ((pci_int_status & PCI_INT_INT_PEND) == 0)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 468) /* Not our interrupt, bail out quickly. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 469) return IRQ_NONE;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 470)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 471) if ((pci_int_status & PCI_INT_P1394_INT) != 0) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 472) u32 link_int_status;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 473)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 474) link_int_status = reg_read(lynx, LINK_INT_STATUS);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 475) reg_write(lynx, LINK_INT_STATUS, link_int_status);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 476)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 477) if ((link_int_status & LINK_INT_PHY_BUSRESET) > 0)
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 478) bus_reset_irq_handler(lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 479) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 480)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 481) /* Clear the PCI_INT_STATUS register only after clearing the
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 482) * LINK_INT_STATUS register; otherwise the PCI_INT_P1394 will
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 483) * be set again immediately. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 484)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 485) reg_write(lynx, PCI_INT_STATUS, pci_int_status);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 486)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 487) if ((pci_int_status & PCI_INT_DMA0_HLT) > 0) {
685c3f80b6d88 (Stefan Richter 2010-07-22 11:56:38 +0200 488) packet_irq_handler(lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 489) run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 490) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 491)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 492) return IRQ_HANDLED;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 493) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 494)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 495) static void
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 496) remove_card(struct pci_dev *dev)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 497) {
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 498) struct pcilynx *lynx = pci_get_drvdata(dev);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 499) struct client *client;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 500)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 501) mutex_lock(&card_mutex);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 502) list_del_init(&lynx->link);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 503) misc_deregister(&lynx->misc);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 504) mutex_unlock(&card_mutex);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 505)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 506) reg_write(lynx, PCI_INT_ENABLE, 0);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 507) free_irq(lynx->pci_device->irq, lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 508)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 509) spin_lock_irq(&lynx->client_list_lock);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 510) list_for_each_entry(client, &lynx->client_list, link)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 511) wake_up_interruptible(&client->buffer.wait);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 512) spin_unlock_irq(&lynx->client_list_lock);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 513)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 514) pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 515) lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 516) pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 517) lynx->rcv_pcl, lynx->rcv_pcl_bus);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 518) pci_free_consistent(lynx->pci_device, PAGE_SIZE,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 519) lynx->rcv_buffer, lynx->rcv_buffer_bus);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 520)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 521) iounmap(lynx->registers);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 522) pci_disable_device(dev);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 523) lynx_put(lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 524) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 525)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 526) #define RCV_BUFFER_SIZE (16 * 1024)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 527)
03f94c0f6215f (Bill Pemberton 2012-11-19 13:22:57 -0500 528) static int
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 529) add_card(struct pci_dev *dev, const struct pci_device_id *unused)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 530) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 531) struct pcilynx *lynx;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 532) u32 p, end;
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 533) int ret, i;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 534)
e894d1d7fd8cf (santosh nayak 2012-02-21 15:38:13 +0530 535) if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 536) dev_err(&dev->dev,
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 537) "DMA address limits not supported for PCILynx hardware\n");
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 538) return -ENXIO;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 539) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 540) if (pci_enable_device(dev)) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 541) dev_err(&dev->dev, "Failed to enable PCILynx hardware\n");
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 542) return -ENXIO;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 543) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 544) pci_set_master(dev);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 545)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 546) lynx = kzalloc(sizeof *lynx, GFP_KERNEL);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 547) if (lynx == NULL) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 548) dev_err(&dev->dev, "Failed to allocate control structure\n");
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 549) ret = -ENOMEM;
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 550) goto fail_disable;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 551) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 552) lynx->pci_device = dev;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 553) pci_set_drvdata(dev, lynx);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 554)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 555) spin_lock_init(&lynx->client_list_lock);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 556) INIT_LIST_HEAD(&lynx->client_list);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 557) kref_init(&lynx->kref);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 558)
4bdc0d676a643 (Christoph Hellwig 2020-01-06 09:43:50 +0100 559) lynx->registers = ioremap(pci_resource_start(dev, 0),
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 560) PCILYNX_MAX_REGISTER);
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 561) if (lynx->registers == NULL) {
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 562) dev_err(&dev->dev, "Failed to map registers\n");
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 563) ret = -ENOMEM;
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 564) goto fail_deallocate_lynx;
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 565) }
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 566)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 567) lynx->rcv_start_pcl = pci_alloc_consistent(lynx->pci_device,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 568) sizeof(struct pcl), &lynx->rcv_start_pcl_bus);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 569) lynx->rcv_pcl = pci_alloc_consistent(lynx->pci_device,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 570) sizeof(struct pcl), &lynx->rcv_pcl_bus);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 571) lynx->rcv_buffer = pci_alloc_consistent(lynx->pci_device,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 572) RCV_BUFFER_SIZE, &lynx->rcv_buffer_bus);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 573) if (lynx->rcv_start_pcl == NULL ||
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 574) lynx->rcv_pcl == NULL ||
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 575) lynx->rcv_buffer == NULL) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 576) dev_err(&dev->dev, "Failed to allocate receive buffer\n");
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 577) ret = -ENOMEM;
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 578) goto fail_deallocate_buffers;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 579) }
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 580) lynx->rcv_start_pcl->next = cpu_to_le32(lynx->rcv_pcl_bus);
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 581) lynx->rcv_pcl->next = cpu_to_le32(PCL_NEXT_INVALID);
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 582) lynx->rcv_pcl->async_error_next = cpu_to_le32(PCL_NEXT_INVALID);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 583)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 584) lynx->rcv_pcl->buffer[0].control =
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 585) cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2044);
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 586) lynx->rcv_pcl->buffer[0].pointer =
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 587) cpu_to_le32(lynx->rcv_buffer_bus + 4);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 588) p = lynx->rcv_buffer_bus + 2048;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 589) end = lynx->rcv_buffer_bus + RCV_BUFFER_SIZE;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 590) for (i = 1; p < end; i++, p += 2048) {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 591) lynx->rcv_pcl->buffer[i].control =
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 592) cpu_to_le32(PCL_CMD_RCV | PCL_BIGENDIAN | 2048);
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 593) lynx->rcv_pcl->buffer[i].pointer = cpu_to_le32(p);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 594) }
fd8c8d46ca940 (Stefan Richter 2010-07-22 11:56:38 +0200 595) lynx->rcv_pcl->buffer[i - 1].control |= cpu_to_le32(PCL_LAST_BUFF);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 596)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 597) reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 598) /* Fix buggy cards with autoboot pin not tied low: */
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 599) reg_write(lynx, DMA0_CHAN_CTRL, 0);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 600) reg_write(lynx, DMA_GLOBAL_REGISTER, 0x00 << 24);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 601)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 602) #if 0
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 603) /* now, looking for PHY register set */
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 604) if ((get_phy_reg(lynx, 2) & 0xe0) == 0xe0) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 605) lynx->phyic.reg_1394a = 1;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 606) PRINT(KERN_INFO, lynx->id,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 607) "found 1394a conform PHY (using extended register set)");
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 608) lynx->phyic.vendor = get_phy_vendorid(lynx);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 609) lynx->phyic.product = get_phy_productid(lynx);
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 610) } else {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 611) lynx->phyic.reg_1394a = 0;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 612) PRINT(KERN_INFO, lynx->id, "found old 1394 PHY");
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 613) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 614) #endif
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 615)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 616) /* Setup the general receive FIFO max size. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 617) reg_write(lynx, FIFO_SIZES, 255);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 618)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 619) reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 620)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 621) reg_write(lynx, LINK_INT_ENABLE,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 622) LINK_INT_PHY_TIME_OUT | LINK_INT_PHY_REG_RCVD |
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 623) LINK_INT_PHY_BUSRESET | LINK_INT_IT_STUCK |
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 624) LINK_INT_AT_STUCK | LINK_INT_SNTRJ |
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 625) LINK_INT_TC_ERR | LINK_INT_GRF_OVER_FLOW |
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 626) LINK_INT_ITF_UNDER_FLOW | LINK_INT_ATF_UNDER_FLOW);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 627)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 628) /* Disable the L flag in self ID packets. */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 629) set_phy_reg(lynx, 4, 0);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 630)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 631) /* Put this baby into snoop mode */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 632) reg_set_bits(lynx, LINK_CONTROL, LINK_CONTROL_SNOOP_ENABLE);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 633)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 634) run_pcl(lynx, lynx->rcv_start_pcl_bus, 0);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 635)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 636) if (request_irq(dev->irq, irq_handler, IRQF_SHARED,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 637) driver_name, lynx)) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 638) dev_err(&dev->dev,
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 639) "Failed to allocate shared interrupt %d\n", dev->irq);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 640) ret = -EIO;
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 641) goto fail_deallocate_buffers;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 642) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 643)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 644) lynx->misc.parent = &dev->dev;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 645) lynx->misc.minor = MISC_DYNAMIC_MINOR;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 646) lynx->misc.name = "nosy";
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 647) lynx->misc.fops = &nosy_ops;
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 648)
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 649) mutex_lock(&card_mutex);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 650) ret = misc_register(&lynx->misc);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 651) if (ret) {
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 652) dev_err(&dev->dev, "Failed to register misc char device\n");
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 653) mutex_unlock(&card_mutex);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 654) goto fail_free_irq;
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 655) }
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 656) list_add_tail(&lynx->link, &card_list);
424d66cedae8b (Stefan Richter 2010-07-22 11:56:38 +0200 657) mutex_unlock(&card_mutex);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 658)
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 659) dev_info(&dev->dev,
7429b17d30a19 (Stefan Richter 2010-07-22 11:56:38 +0200 660) "Initialized PCILynx IEEE1394 card, irq=%d\n", dev->irq);
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 661)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 662) return 0;
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 663)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 664) fail_free_irq:
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 665) reg_write(lynx, PCI_INT_ENABLE, 0);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 666) free_irq(lynx->pci_device->irq, lynx);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 667)
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 668) fail_deallocate_buffers:
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 669) if (lynx->rcv_start_pcl)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 670) pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 671) lynx->rcv_start_pcl, lynx->rcv_start_pcl_bus);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 672) if (lynx->rcv_pcl)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 673) pci_free_consistent(lynx->pci_device, sizeof(struct pcl),
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 674) lynx->rcv_pcl, lynx->rcv_pcl_bus);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 675) if (lynx->rcv_buffer)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 676) pci_free_consistent(lynx->pci_device, PAGE_SIZE,
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 677) lynx->rcv_buffer, lynx->rcv_buffer_bus);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 678) iounmap(lynx->registers);
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 679)
6449e31ddebdc (Alexey Khoroshilov 2016-09-25 00:19:05 +0300 680) fail_deallocate_lynx:
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 681) kfree(lynx);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 682)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 683) fail_disable:
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 684) pci_disable_device(dev);
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 685)
b6d9c125e6610 (Stefan Richter 2010-07-22 11:56:38 +0200 686) return ret;
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 687) }
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 688)
7eeb741895ea8 (Bill Pemberton 2012-11-19 13:24:13 -0500 689) static struct pci_device_id pci_table[] = {
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 690) {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 691) .vendor = PCI_VENDOR_ID_TI,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 692) .device = PCI_DEVICE_ID_TI_PCILYNX,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 693) .subvendor = PCI_ANY_ID,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 694) .subdevice = PCI_ANY_ID,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 695) },
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 696) { } /* Terminating entry */
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 697) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 698)
fe2af11c220c7 (Axel Lin 2012-04-03 10:07:01 +0800 699) MODULE_DEVICE_TABLE(pci, pci_table);
fe2af11c220c7 (Axel Lin 2012-04-03 10:07:01 +0800 700)
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 701) static struct pci_driver lynx_pci_driver = {
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 702) .name = driver_name,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 703) .id_table = pci_table,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 704) .probe = add_card,
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 705) .remove = remove_card,
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 706) };
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 707)
fe2af11c220c7 (Axel Lin 2012-04-03 10:07:01 +0800 708) module_pci_driver(lynx_pci_driver);
fe2af11c220c7 (Axel Lin 2012-04-03 10:07:01 +0800 709)
b5e47729043c9 (Stefan Richter 2010-07-27 10:28:30 +0200 710) MODULE_AUTHOR("Kristian Hoegsberg");
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 711) MODULE_DESCRIPTION("Snoop mode driver for TI pcilynx 1394 controllers");
286468210d83c (Stefan Richter 2010-07-27 10:26:33 +0200 712) MODULE_LICENSE("GPL");
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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