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path: root/drivers/ieee1394/pcilynx.c
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Diffstat (limited to 'drivers/ieee1394/pcilynx.c')
-rw-r--r--drivers/ieee1394/pcilynx.c394
1 files changed, 3 insertions, 391 deletions
diff --git a/drivers/ieee1394/pcilynx.c b/drivers/ieee1394/pcilynx.c
index a261d2b0e5ac..bdb3a85cafa6 100644
--- a/drivers/ieee1394/pcilynx.c
+++ b/drivers/ieee1394/pcilynx.c
@@ -43,6 +43,7 @@
43#include <linux/fs.h> 43#include <linux/fs.h>
44#include <linux/poll.h> 44#include <linux/poll.h>
45#include <linux/kdev_t.h> 45#include <linux/kdev_t.h>
46#include <linux/dma-mapping.h>
46#include <asm/byteorder.h> 47#include <asm/byteorder.h>
47#include <asm/atomic.h> 48#include <asm/atomic.h>
48#include <asm/io.h> 49#include <asm/io.h>
@@ -834,327 +835,6 @@ static int lynx_devctl(struct hpsb_host *host, enum devctl_cmd cmd, int arg)
834 * IEEE-1394 functionality section END * 835 * IEEE-1394 functionality section END *
835 ***************************************/ 836 ***************************************/
836 837
837#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
838/* VFS functions for local bus / aux device access. Access to those
839 * is implemented as a character device instead of block devices
840 * because buffers are not wanted for this. Therefore llseek (from
841 * VFS) can be used for these char devices with obvious effects.
842 */
843static int mem_open(struct inode*, struct file*);
844static int mem_release(struct inode*, struct file*);
845static unsigned int aux_poll(struct file*, struct poll_table_struct*);
846static loff_t mem_llseek(struct file*, loff_t, int);
847static ssize_t mem_read (struct file*, char*, size_t, loff_t*);
848static ssize_t mem_write(struct file*, const char*, size_t, loff_t*);
849
850
851static struct file_operations aux_ops = {
852 .owner = THIS_MODULE,
853 .read = mem_read,
854 .write = mem_write,
855 .poll = aux_poll,
856 .llseek = mem_llseek,
857 .open = mem_open,
858 .release = mem_release,
859};
860
861
862static void aux_setup_pcls(struct ti_lynx *lynx)
863{
864 struct ti_pcl pcl;
865
866 pcl.next = PCL_NEXT_INVALID;
867 pcl.user_data = pcl_bus(lynx, lynx->dmem_pcl);
868 put_pcl(lynx, lynx->dmem_pcl, &pcl);
869}
870
871static int mem_open(struct inode *inode, struct file *file)
872{
873 int cid = iminor(inode);
874 enum { t_rom, t_aux, t_ram } type;
875 struct memdata *md;
876
877 if (cid < PCILYNX_MINOR_AUX_START) {
878 /* just for completeness */
879 return -ENXIO;
880 } else if (cid < PCILYNX_MINOR_ROM_START) {
881 cid -= PCILYNX_MINOR_AUX_START;
882 if (cid >= num_of_cards || !cards[cid].aux_port)
883 return -ENXIO;
884 type = t_aux;
885 } else if (cid < PCILYNX_MINOR_RAM_START) {
886 cid -= PCILYNX_MINOR_ROM_START;
887 if (cid >= num_of_cards || !cards[cid].local_rom)
888 return -ENXIO;
889 type = t_rom;
890 } else {
891 /* WARNING: Know what you are doing when opening RAM.
892 * It is currently used inside the driver! */
893 cid -= PCILYNX_MINOR_RAM_START;
894 if (cid >= num_of_cards || !cards[cid].local_ram)
895 return -ENXIO;
896 type = t_ram;
897 }
898
899 md = (struct memdata *)kmalloc(sizeof(struct memdata), SLAB_KERNEL);
900 if (md == NULL)
901 return -ENOMEM;
902
903 md->lynx = &cards[cid];
904 md->cid = cid;
905
906 switch (type) {
907 case t_rom:
908 md->type = rom;
909 break;
910 case t_ram:
911 md->type = ram;
912 break;
913 case t_aux:
914 atomic_set(&md->aux_intr_last_seen,
915 atomic_read(&cards[cid].aux_intr_seen));
916 md->type = aux;
917 break;
918 }
919
920 file->private_data = md;
921
922 return 0;
923}
924
925static int mem_release(struct inode *inode, struct file *file)
926{
927 kfree(file->private_data);
928 return 0;
929}
930
931static unsigned int aux_poll(struct file *file, poll_table *pt)
932{
933 struct memdata *md = (struct memdata *)file->private_data;
934 int cid = md->cid;
935 unsigned int mask;
936
937 /* reading and writing is always allowed */
938 mask = POLLIN | POLLRDNORM | POLLOUT | POLLWRNORM;
939
940 if (md->type == aux) {
941 poll_wait(file, &cards[cid].aux_intr_wait, pt);
942
943 if (atomic_read(&md->aux_intr_last_seen)
944 != atomic_read(&cards[cid].aux_intr_seen)) {
945 mask |= POLLPRI;
946 atomic_inc(&md->aux_intr_last_seen);
947 }
948 }
949
950 return mask;
951}
952
953loff_t mem_llseek(struct file *file, loff_t offs, int orig)
954{
955 loff_t newoffs;
956
957 switch (orig) {
958 case 0:
959 newoffs = offs;
960 break;
961 case 1:
962 newoffs = offs + file->f_pos;
963 break;
964 case 2:
965 newoffs = PCILYNX_MAX_MEMORY + 1 + offs;
966 break;
967 default:
968 return -EINVAL;
969 }
970
971 if (newoffs < 0 || newoffs > PCILYNX_MAX_MEMORY + 1) return -EINVAL;
972
973 file->f_pos = newoffs;
974 return newoffs;
975}
976
977/*
978 * do not DMA if count is too small because this will have a serious impact
979 * on performance - the value 2400 was found by experiment and may not work
980 * everywhere as good as here - use mem_mindma option for modules to change
981 */
982static short mem_mindma = 2400;
983module_param(mem_mindma, short, 0444);
984MODULE_PARM_DESC(mem_mindma, "Minimum amount of data required to use DMA");
985
986static ssize_t mem_dmaread(struct memdata *md, u32 physbuf, ssize_t count,
987 int offset)
988{
989 pcltmp_t pcltmp;
990 struct ti_pcl *pcl;
991 size_t retval;
992 int i;
993 DECLARE_WAITQUEUE(wait, current);
994
995 count &= ~3;
996 count = min(count, 53196);
997 retval = count;
998
999 if (reg_read(md->lynx, DMA_CHAN_CTRL(CHANNEL_LOCALBUS))
1000 & DMA_CHAN_CTRL_BUSY) {
1001 PRINT(KERN_WARNING, md->lynx->id, "DMA ALREADY ACTIVE!");
1002 }
1003
1004 reg_write(md->lynx, LBUS_ADDR, md->type | offset);
1005
1006 pcl = edit_pcl(md->lynx, md->lynx->dmem_pcl, &pcltmp);
1007 pcl->buffer[0].control = PCL_CMD_LBUS_TO_PCI | min(count, 4092);
1008 pcl->buffer[0].pointer = physbuf;
1009 count -= 4092;
1010
1011 i = 0;
1012 while (count > 0) {
1013 i++;
1014 pcl->buffer[i].control = min(count, 4092);
1015 pcl->buffer[i].pointer = physbuf + i * 4092;
1016 count -= 4092;
1017 }
1018 pcl->buffer[i].control |= PCL_LAST_BUFF;
1019 commit_pcl(md->lynx, md->lynx->dmem_pcl, &pcltmp);
1020
1021 set_current_state(TASK_INTERRUPTIBLE);
1022 add_wait_queue(&md->lynx->mem_dma_intr_wait, &wait);
1023 run_sub_pcl(md->lynx, md->lynx->dmem_pcl, 2, CHANNEL_LOCALBUS);
1024
1025 schedule();
1026 while (reg_read(md->lynx, DMA_CHAN_CTRL(CHANNEL_LOCALBUS))
1027 & DMA_CHAN_CTRL_BUSY) {
1028 if (signal_pending(current)) {
1029 retval = -EINTR;
1030 break;
1031 }
1032 schedule();
1033 }
1034
1035 reg_write(md->lynx, DMA_CHAN_CTRL(CHANNEL_LOCALBUS), 0);
1036 remove_wait_queue(&md->lynx->mem_dma_intr_wait, &wait);
1037
1038 if (reg_read(md->lynx, DMA_CHAN_CTRL(CHANNEL_LOCALBUS))
1039 & DMA_CHAN_CTRL_BUSY) {
1040 PRINT(KERN_ERR, md->lynx->id, "DMA STILL ACTIVE!");
1041 }
1042
1043 return retval;
1044}
1045
1046static ssize_t mem_read(struct file *file, char *buffer, size_t count,
1047 loff_t *offset)
1048{
1049 struct memdata *md = (struct memdata *)file->private_data;
1050 ssize_t bcount;
1051 size_t alignfix;
1052 loff_t off = *offset; /* avoid useless 64bit-arithmetic */
1053 ssize_t retval;
1054 void *membase;
1055
1056 if ((off + count) > PCILYNX_MAX_MEMORY+1) {
1057 count = PCILYNX_MAX_MEMORY+1 - off;
1058 }
1059 if (count == 0 || off > PCILYNX_MAX_MEMORY) {
1060 return -ENOSPC;
1061 }
1062
1063 switch (md->type) {
1064 case rom:
1065 membase = md->lynx->local_rom;
1066 break;
1067 case ram:
1068 membase = md->lynx->local_ram;
1069 break;
1070 case aux:
1071 membase = md->lynx->aux_port;
1072 break;
1073 default:
1074 panic("pcilynx%d: unsupported md->type %d in %s",
1075 md->lynx->id, md->type, __FUNCTION__);
1076 }
1077
1078 down(&md->lynx->mem_dma_mutex);
1079
1080 if (count < mem_mindma) {
1081 memcpy_fromio(md->lynx->mem_dma_buffer, membase+off, count);
1082 goto out;
1083 }
1084
1085 bcount = count;
1086 alignfix = 4 - (off % 4);
1087 if (alignfix != 4) {
1088 if (bcount < alignfix) {
1089 alignfix = bcount;
1090 }
1091 memcpy_fromio(md->lynx->mem_dma_buffer, membase+off,
1092 alignfix);
1093 if (bcount == alignfix) {
1094 goto out;
1095 }
1096 bcount -= alignfix;
1097 off += alignfix;
1098 }
1099
1100 while (bcount >= 4) {
1101 retval = mem_dmaread(md, md->lynx->mem_dma_buffer_dma
1102 + count - bcount, bcount, off);
1103 if (retval < 0) return retval;
1104
1105 bcount -= retval;
1106 off += retval;
1107 }
1108
1109 if (bcount) {
1110 memcpy_fromio(md->lynx->mem_dma_buffer + count - bcount,
1111 membase+off, bcount);
1112 }
1113
1114 out:
1115 retval = copy_to_user(buffer, md->lynx->mem_dma_buffer, count);
1116 up(&md->lynx->mem_dma_mutex);
1117
1118 if (retval) return -EFAULT;
1119 *offset += count;
1120 return count;
1121}
1122
1123
1124static ssize_t mem_write(struct file *file, const char *buffer, size_t count,
1125 loff_t *offset)
1126{
1127 struct memdata *md = (struct memdata *)file->private_data;
1128
1129 if (((*offset) + count) > PCILYNX_MAX_MEMORY+1) {
1130 count = PCILYNX_MAX_MEMORY+1 - *offset;
1131 }
1132 if (count == 0 || *offset > PCILYNX_MAX_MEMORY) {
1133 return -ENOSPC;
1134 }
1135
1136 /* FIXME: dereferencing pointers to PCI mem doesn't work everywhere */
1137 switch (md->type) {
1138 case aux:
1139 if (copy_from_user(md->lynx->aux_port+(*offset), buffer, count))
1140 return -EFAULT;
1141 break;
1142 case ram:
1143 if (copy_from_user(md->lynx->local_ram+(*offset), buffer, count))
1144 return -EFAULT;
1145 break;
1146 case rom:
1147 /* the ROM may be writeable */
1148 if (copy_from_user(md->lynx->local_rom+(*offset), buffer, count))
1149 return -EFAULT;
1150 break;
1151 }
1152
1153 file->f_pos += count;
1154 return count;
1155}
1156#endif /* CONFIG_IEEE1394_PCILYNX_PORTS */
1157
1158 838
1159/******************************************************** 839/********************************************************
1160 * Global stuff (interrupt handler, init/shutdown code) * 840 * Global stuff (interrupt handler, init/shutdown code) *
@@ -1181,18 +861,6 @@ static irqreturn_t lynx_irq_handler(int irq, void *dev_id,
1181 reg_write(lynx, LINK_INT_STATUS, linkint); 861 reg_write(lynx, LINK_INT_STATUS, linkint);
1182 reg_write(lynx, PCI_INT_STATUS, intmask); 862 reg_write(lynx, PCI_INT_STATUS, intmask);
1183 863
1184#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1185 if (intmask & PCI_INT_AUX_INT) {
1186 atomic_inc(&lynx->aux_intr_seen);
1187 wake_up_interruptible(&lynx->aux_intr_wait);
1188 }
1189
1190 if (intmask & PCI_INT_DMA_HLT(CHANNEL_LOCALBUS)) {
1191 wake_up_interruptible(&lynx->mem_dma_intr_wait);
1192 }
1193#endif
1194
1195
1196 if (intmask & PCI_INT_1394) { 864 if (intmask & PCI_INT_1394) {
1197 if (linkint & LINK_INT_PHY_TIMEOUT) { 865 if (linkint & LINK_INT_PHY_TIMEOUT) {
1198 PRINT(KERN_INFO, lynx->id, "PHY timeout occurred"); 866 PRINT(KERN_INFO, lynx->id, "PHY timeout occurred");
@@ -1484,15 +1152,9 @@ static void remove_card(struct pci_dev *dev)
1484 pci_free_consistent(lynx->dev, PAGE_SIZE, lynx->rcv_page, 1152 pci_free_consistent(lynx->dev, PAGE_SIZE, lynx->rcv_page,
1485 lynx->rcv_page_dma); 1153 lynx->rcv_page_dma);
1486 case have_aux_buf: 1154 case have_aux_buf:
1487#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1488 pci_free_consistent(lynx->dev, 65536, lynx->mem_dma_buffer,
1489 lynx->mem_dma_buffer_dma);
1490#endif
1491 case have_pcl_mem: 1155 case have_pcl_mem:
1492#ifndef CONFIG_IEEE1394_PCILYNX_LOCALRAM
1493 pci_free_consistent(lynx->dev, LOCALRAM_SIZE, lynx->pcl_mem, 1156 pci_free_consistent(lynx->dev, LOCALRAM_SIZE, lynx->pcl_mem,
1494 lynx->pcl_mem_dma); 1157 lynx->pcl_mem_dma);
1495#endif
1496 case clear: 1158 case clear:
1497 /* do nothing - already freed */ 1159 /* do nothing - already freed */
1498 ; 1160 ;
@@ -1524,7 +1186,7 @@ static int __devinit add_card(struct pci_dev *dev,
1524 1186
1525 error = -ENXIO; 1187 error = -ENXIO;
1526 1188
1527 if (pci_set_dma_mask(dev, 0xffffffff)) 1189 if (pci_set_dma_mask(dev, DMA_32BIT_MASK))
1528 FAIL("DMA address limits not supported for PCILynx hardware"); 1190 FAIL("DMA address limits not supported for PCILynx hardware");
1529 if (pci_enable_device(dev)) 1191 if (pci_enable_device(dev))
1530 FAIL("failed to enable PCILynx hardware"); 1192 FAIL("failed to enable PCILynx hardware");
@@ -1546,7 +1208,6 @@ static int __devinit add_card(struct pci_dev *dev,
1546 spin_lock_init(&lynx->lock); 1208 spin_lock_init(&lynx->lock);
1547 spin_lock_init(&lynx->phy_reg_lock); 1209 spin_lock_init(&lynx->phy_reg_lock);
1548 1210
1549#ifndef CONFIG_IEEE1394_PCILYNX_LOCALRAM
1550 lynx->pcl_mem = pci_alloc_consistent(dev, LOCALRAM_SIZE, 1211 lynx->pcl_mem = pci_alloc_consistent(dev, LOCALRAM_SIZE,
1551 &lynx->pcl_mem_dma); 1212 &lynx->pcl_mem_dma);
1552 1213
@@ -1558,16 +1219,6 @@ static int __devinit add_card(struct pci_dev *dev,
1558 } else { 1219 } else {
1559 FAIL("failed to allocate PCL memory area"); 1220 FAIL("failed to allocate PCL memory area");
1560 } 1221 }
1561#endif
1562
1563#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1564 lynx->mem_dma_buffer = pci_alloc_consistent(dev, 65536,
1565 &lynx->mem_dma_buffer_dma);
1566 if (lynx->mem_dma_buffer == NULL) {
1567 FAIL("failed to allocate DMA buffer for aux");
1568 }
1569 lynx->state = have_aux_buf;
1570#endif
1571 1222
1572 lynx->rcv_page = pci_alloc_consistent(dev, PAGE_SIZE, 1223 lynx->rcv_page = pci_alloc_consistent(dev, PAGE_SIZE,
1573 &lynx->rcv_page_dma); 1224 &lynx->rcv_page_dma);
@@ -1597,13 +1248,6 @@ static int __devinit add_card(struct pci_dev *dev,
1597 FAIL("failed to remap registers - card not accessible"); 1248 FAIL("failed to remap registers - card not accessible");
1598 } 1249 }
1599 1250
1600#ifdef CONFIG_IEEE1394_PCILYNX_LOCALRAM
1601 if (lynx->local_ram == NULL) {
1602 FAIL("failed to remap local RAM which is required for "
1603 "operation");
1604 }
1605#endif
1606
1607 reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET); 1251 reg_set_bits(lynx, MISC_CONTROL, MISC_CONTROL_SWRESET);
1608 /* Fix buggy cards with autoboot pin not tied low: */ 1252 /* Fix buggy cards with autoboot pin not tied low: */
1609 reg_write(lynx, DMA0_CHAN_CTRL, 0); 1253 reg_write(lynx, DMA0_CHAN_CTRL, 0);
@@ -1624,13 +1268,6 @@ static int __devinit add_card(struct pci_dev *dev,
1624 1268
1625 /* alloc_pcl return values are not checked, it is expected that the 1269 /* alloc_pcl return values are not checked, it is expected that the
1626 * provided PCL space is sufficient for the initial allocations */ 1270 * provided PCL space is sufficient for the initial allocations */
1627#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1628 if (lynx->aux_port != NULL) {
1629 lynx->dmem_pcl = alloc_pcl(lynx);
1630 aux_setup_pcls(lynx);
1631 sema_init(&lynx->mem_dma_mutex, 1);
1632 }
1633#endif
1634 lynx->rcv_pcl = alloc_pcl(lynx); 1271 lynx->rcv_pcl = alloc_pcl(lynx);
1635 lynx->rcv_pcl_start = alloc_pcl(lynx); 1272 lynx->rcv_pcl_start = alloc_pcl(lynx);
1636 lynx->async.pcl = alloc_pcl(lynx); 1273 lynx->async.pcl = alloc_pcl(lynx);
@@ -1647,12 +1284,6 @@ static int __devinit add_card(struct pci_dev *dev,
1647 1284
1648 reg_write(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL); 1285 reg_write(lynx, PCI_INT_ENABLE, PCI_INT_DMA_ALL);
1649 1286
1650#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1651 reg_set_bits(lynx, PCI_INT_ENABLE, PCI_INT_AUX_INT);
1652 init_waitqueue_head(&lynx->mem_dma_intr_wait);
1653 init_waitqueue_head(&lynx->aux_intr_wait);
1654#endif
1655
1656 tasklet_init(&lynx->iso_rcv.tq, (void (*)(unsigned long))iso_rcv_bh, 1287 tasklet_init(&lynx->iso_rcv.tq, (void (*)(unsigned long))iso_rcv_bh,
1657 (unsigned long)lynx); 1288 (unsigned long)lynx);
1658 1289
@@ -1944,37 +1575,18 @@ static int __init pcilynx_init(void)
1944{ 1575{
1945 int ret; 1576 int ret;
1946 1577
1947#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1948 if (register_chrdev(PCILYNX_MAJOR, PCILYNX_DRIVER_NAME, &aux_ops)) {
1949 PRINT_G(KERN_ERR, "allocation of char major number %d failed",
1950 PCILYNX_MAJOR);
1951 return -EBUSY;
1952 }
1953#endif
1954
1955 ret = pci_register_driver(&lynx_pci_driver); 1578 ret = pci_register_driver(&lynx_pci_driver);
1956 if (ret < 0) { 1579 if (ret < 0) {
1957 PRINT_G(KERN_ERR, "PCI module init failed"); 1580 PRINT_G(KERN_ERR, "PCI module init failed");
1958 goto free_char_dev; 1581 return ret;
1959 } 1582 }
1960 1583
1961 return 0; 1584 return 0;
1962
1963 free_char_dev:
1964#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1965 unregister_chrdev(PCILYNX_MAJOR, PCILYNX_DRIVER_NAME);
1966#endif
1967
1968 return ret;
1969} 1585}
1970 1586
1971static void __exit pcilynx_cleanup(void) 1587static void __exit pcilynx_cleanup(void)
1972{ 1588{
1973 pci_unregister_driver(&lynx_pci_driver); 1589 pci_unregister_driver(&lynx_pci_driver);
1974
1975#ifdef CONFIG_IEEE1394_PCILYNX_PORTS
1976 unregister_chrdev(PCILYNX_MAJOR, PCILYNX_DRIVER_NAME);
1977#endif
1978} 1590}
1979 1591
1980 1592