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ohci1394.c
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ohci1394.c
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/*
* ohci1394.c - driver for OHCI 1394 boards
* Copyright (C)1999,2000 Sebastien Rougeaux <[email protected]>
* Gord Peters <[email protected]>
* 2001 Ben Collins <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/*
* Things known to be working:
* . Async Request Transmit
* . Async Response Receive
* . Async Request Receive
* . Async Response Transmit
* . Iso Receive
* . DMA mmap for iso receive
* . Config ROM generation
*
* Things implemented, but still in test phase:
* . Iso Transmit
* . Async Stream Packets Transmit (Receive done via Iso interface)
*
* Things not implemented:
* . DMA error recovery
*
* Known bugs:
* . devctl BUS_RESET arg confusion (reset type or root holdoff?)
* added LONG_RESET_ROOT and SHORT_RESET_ROOT for root holdoff --kk
*/
/*
* Acknowledgments:
*
* Adam J Richter <[email protected]>
* . Use of pci_class to find device
*
* Emilie Chung <[email protected]>
* . Tip on Async Request Filter
*
* Pascal Drolet <[email protected]>
* . Various tips for optimization and functionnalities
*
* Robert Ficklin <[email protected]>
* . Loop in irq_handler
*
* James Goodwin <[email protected]>
* . Various tips on initialization, self-id reception, etc.
*
* Albrecht Dress <[email protected]>
* . Apple PowerBook detection
*
* Daniel Kobras <[email protected]>
* . Reset the board properly before leaving + misc cleanups
*
* Leon van Stuivenberg <[email protected]>
* . Bug fixes
*
* Ben Collins <[email protected]>
* . Working big-endian support
* . Updated to 2.4.x module scheme (PCI aswell)
* . Config ROM generation
*
* Manfred Weihs <[email protected]>
* . Reworked code for initiating bus resets
* (long, short, with or without hold-off)
*
* Nandu Santhi <[email protected]>
* . Added support for nVidia nForce2 onboard Firewire chipset
*
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/pci.h>
#include <linux/fs.h>
#include <linux/poll.h>
#include <asm/byteorder.h>
#include <asm/atomic.h>
#include <asm/uaccess.h>
#include <linux/delay.h>
#include <linux/spinlock.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
#include <linux/types.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#ifdef CONFIG_PPC_PMAC
#include <asm/machdep.h>
#include <asm/pmac_feature.h>
#include <asm/prom.h>
#include <asm/pci-bridge.h>
#endif
#include "csr1212.h"
#include "ieee1394.h"
#include "ieee1394_types.h"
#include "hosts.h"
#include "dma.h"
#include "iso.h"
#include "ieee1394_core.h"
#include "highlevel.h"
#include "ohci1394.h"
#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
#define OHCI1394_DEBUG
#endif
#ifdef DBGMSG
#undef DBGMSG
#endif
#ifdef OHCI1394_DEBUG
#define DBGMSG(fmt, args...) \
printk(KERN_INFO "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host->id , ## args)
#else
#define DBGMSG(fmt, args...) do {} while (0)
#endif
#ifdef CONFIG_IEEE1394_OHCI_DMA_DEBUG
#define OHCI_DMA_ALLOC(fmt, args...) \
HPSB_ERR("%s(%s)alloc(%d): "fmt, OHCI1394_DRIVER_NAME, __FUNCTION__, \
++global_outstanding_dmas, ## args)
#define OHCI_DMA_FREE(fmt, args...) \
HPSB_ERR("%s(%s)free(%d): "fmt, OHCI1394_DRIVER_NAME, __FUNCTION__, \
--global_outstanding_dmas, ## args)
static int global_outstanding_dmas = 0;
#else
#define OHCI_DMA_ALLOC(fmt, args...) do {} while (0)
#define OHCI_DMA_FREE(fmt, args...) do {} while (0)
#endif
/* print general (card independent) information */
#define PRINT_G(level, fmt, args...) \
printk(level "%s: " fmt "\n" , OHCI1394_DRIVER_NAME , ## args)
/* print card specific information */
#define PRINT(level, fmt, args...) \
printk(level "%s: fw-host%d: " fmt "\n" , OHCI1394_DRIVER_NAME, ohci->host->id , ## args)
/* Module Parameters */
static int phys_dma = 1;
module_param(phys_dma, int, 0444);
MODULE_PARM_DESC(phys_dma, "Enable physical dma (default = 1).");
static void dma_trm_tasklet(unsigned long data);
static void dma_trm_reset(struct dma_trm_ctx *d);
static int alloc_dma_rcv_ctx(struct ti_ohci *ohci, struct dma_rcv_ctx *d,
enum context_type type, int ctx, int num_desc,
int buf_size, int split_buf_size, int context_base);
static void stop_dma_rcv_ctx(struct dma_rcv_ctx *d);
static void free_dma_rcv_ctx(struct dma_rcv_ctx *d);
static int alloc_dma_trm_ctx(struct ti_ohci *ohci, struct dma_trm_ctx *d,
enum context_type type, int ctx, int num_desc,
int context_base);
static void ohci1394_pci_remove(struct pci_dev *pdev);
#ifndef __LITTLE_ENDIAN
const static size_t hdr_sizes[] = {
3, /* TCODE_WRITEQ */
4, /* TCODE_WRITEB */
3, /* TCODE_WRITE_RESPONSE */
0, /* reserved */
3, /* TCODE_READQ */
4, /* TCODE_READB */
3, /* TCODE_READQ_RESPONSE */
4, /* TCODE_READB_RESPONSE */
1, /* TCODE_CYCLE_START */
4, /* TCODE_LOCK_REQUEST */
2, /* TCODE_ISO_DATA */
4, /* TCODE_LOCK_RESPONSE */
/* rest is reserved or link-internal */
};
static inline void header_le32_to_cpu(quadlet_t *data, unsigned char tcode)
{
size_t size;
if (unlikely(tcode >= ARRAY_SIZE(hdr_sizes)))
return;
size = hdr_sizes[tcode];
while (size--)
data[size] = le32_to_cpu(data[size]);
}
#else
#define header_le32_to_cpu(w,x) do {} while (0)
#endif /* !LITTLE_ENDIAN */
/***********************************
* IEEE-1394 functionality section *
***********************************/
static u8 get_phy_reg(struct ti_ohci *ohci, u8 addr)
{
int i;
unsigned long flags;
quadlet_t r;
spin_lock_irqsave (&ohci->phy_reg_lock, flags);
reg_write(ohci, OHCI1394_PhyControl, (addr << 8) | 0x00008000);
for (i = 0; i < OHCI_LOOP_COUNT; i++) {
if (reg_read(ohci, OHCI1394_PhyControl) & 0x80000000)
break;
mdelay(1);
}
r = reg_read(ohci, OHCI1394_PhyControl);
if (i >= OHCI_LOOP_COUNT)
PRINT (KERN_ERR, "Get PHY Reg timeout [0x%08x/0x%08x/%d]",
r, r & 0x80000000, i);
spin_unlock_irqrestore (&ohci->phy_reg_lock, flags);
return (r & 0x00ff0000) >> 16;
}
static void set_phy_reg(struct ti_ohci *ohci, u8 addr, u8 data)
{
int i;
unsigned long flags;
u32 r = 0;
spin_lock_irqsave (&ohci->phy_reg_lock, flags);
reg_write(ohci, OHCI1394_PhyControl, (addr << 8) | data | 0x00004000);
for (i = 0; i < OHCI_LOOP_COUNT; i++) {
r = reg_read(ohci, OHCI1394_PhyControl);
if (!(r & 0x00004000))
break;
mdelay(1);
}
if (i == OHCI_LOOP_COUNT)
PRINT (KERN_ERR, "Set PHY Reg timeout [0x%08x/0x%08x/%d]",
r, r & 0x00004000, i);
spin_unlock_irqrestore (&ohci->phy_reg_lock, flags);
return;
}
/* Or's our value into the current value */
static void set_phy_reg_mask(struct ti_ohci *ohci, u8 addr, u8 data)
{
u8 old;
old = get_phy_reg (ohci, addr);
old |= data;
set_phy_reg (ohci, addr, old);
return;
}
static void handle_selfid(struct ti_ohci *ohci, struct hpsb_host *host,
int phyid, int isroot)
{
quadlet_t *q = ohci->selfid_buf_cpu;
quadlet_t self_id_count=reg_read(ohci, OHCI1394_SelfIDCount);
size_t size;
quadlet_t q0, q1;
/* Check status of self-id reception */
if (ohci->selfid_swap)
q0 = le32_to_cpu(q[0]);
else
q0 = q[0];
if ((self_id_count & 0x80000000) ||
((self_id_count & 0x00FF0000) != (q0 & 0x00FF0000))) {
PRINT(KERN_ERR,
"Error in reception of SelfID packets [0x%08x/0x%08x] (count: %d)",
self_id_count, q0, ohci->self_id_errors);
/* Tip by James Goodwin <[email protected]>:
* We had an error, generate another bus reset in response. */
if (ohci->self_id_errors<OHCI1394_MAX_SELF_ID_ERRORS) {
set_phy_reg_mask (ohci, 1, 0x40);
ohci->self_id_errors++;
} else {
PRINT(KERN_ERR,
"Too many errors on SelfID error reception, giving up!");
}
return;
}
/* SelfID Ok, reset error counter. */
ohci->self_id_errors = 0;
size = ((self_id_count & 0x00001FFC) >> 2) - 1;
q++;
while (size > 0) {
if (ohci->selfid_swap) {
q0 = le32_to_cpu(q[0]);
q1 = le32_to_cpu(q[1]);
} else {
q0 = q[0];
q1 = q[1];
}
if (q0 == ~q1) {
DBGMSG ("SelfID packet 0x%x received", q0);
hpsb_selfid_received(host, cpu_to_be32(q0));
if (((q0 & 0x3f000000) >> 24) == phyid)
DBGMSG ("SelfID for this node is 0x%08x", q0);
} else {
PRINT(KERN_ERR,
"SelfID is inconsistent [0x%08x/0x%08x]", q0, q1);
}
q += 2;
size -= 2;
}
DBGMSG("SelfID complete");
return;
}
static void ohci_soft_reset(struct ti_ohci *ohci) {
int i;
reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_softReset);
for (i = 0; i < OHCI_LOOP_COUNT; i++) {
if (!(reg_read(ohci, OHCI1394_HCControlSet) & OHCI1394_HCControl_softReset))
break;
mdelay(1);
}
DBGMSG ("Soft reset finished");
}
/* Generate the dma receive prgs and start the context */
static void initialize_dma_rcv_ctx(struct dma_rcv_ctx *d, int generate_irq)
{
struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci);
int i;
ohci1394_stop_context(ohci, d->ctrlClear, NULL);
for (i=0; i<d->num_desc; i++) {
u32 c;
c = DMA_CTL_INPUT_MORE | DMA_CTL_UPDATE | DMA_CTL_BRANCH;
if (generate_irq)
c |= DMA_CTL_IRQ;
d->prg_cpu[i]->control = cpu_to_le32(c | d->buf_size);
/* End of descriptor list? */
if (i + 1 < d->num_desc) {
d->prg_cpu[i]->branchAddress =
cpu_to_le32((d->prg_bus[i+1] & 0xfffffff0) | 0x1);
} else {
d->prg_cpu[i]->branchAddress =
cpu_to_le32((d->prg_bus[0] & 0xfffffff0));
}
d->prg_cpu[i]->address = cpu_to_le32(d->buf_bus[i]);
d->prg_cpu[i]->status = cpu_to_le32(d->buf_size);
}
d->buf_ind = 0;
d->buf_offset = 0;
if (d->type == DMA_CTX_ISO) {
/* Clear contextControl */
reg_write(ohci, d->ctrlClear, 0xffffffff);
/* Set bufferFill, isochHeader, multichannel for IR context */
reg_write(ohci, d->ctrlSet, 0xd0000000);
/* Set the context match register to match on all tags */
reg_write(ohci, d->ctxtMatch, 0xf0000000);
/* Clear the multi channel mask high and low registers */
reg_write(ohci, OHCI1394_IRMultiChanMaskHiClear, 0xffffffff);
reg_write(ohci, OHCI1394_IRMultiChanMaskLoClear, 0xffffffff);
/* Set up isoRecvIntMask to generate interrupts */
reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << d->ctx);
}
/* Tell the controller where the first AR program is */
reg_write(ohci, d->cmdPtr, d->prg_bus[0] | 0x1);
/* Run context */
reg_write(ohci, d->ctrlSet, 0x00008000);
DBGMSG("Receive DMA ctx=%d initialized", d->ctx);
}
/* Initialize the dma transmit context */
static void initialize_dma_trm_ctx(struct dma_trm_ctx *d)
{
struct ti_ohci *ohci = (struct ti_ohci*)(d->ohci);
/* Stop the context */
ohci1394_stop_context(ohci, d->ctrlClear, NULL);
d->prg_ind = 0;
d->sent_ind = 0;
d->free_prgs = d->num_desc;
d->branchAddrPtr = NULL;
INIT_LIST_HEAD(&d->fifo_list);
INIT_LIST_HEAD(&d->pending_list);
if (d->type == DMA_CTX_ISO) {
/* enable interrupts */
reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << d->ctx);
}
DBGMSG("Transmit DMA ctx=%d initialized", d->ctx);
}
/* Count the number of available iso contexts */
static int get_nb_iso_ctx(struct ti_ohci *ohci, int reg)
{
int i,ctx=0;
u32 tmp;
reg_write(ohci, reg, 0xffffffff);
tmp = reg_read(ohci, reg);
DBGMSG("Iso contexts reg: %08x implemented: %08x", reg, tmp);
/* Count the number of contexts */
for (i=0; i<32; i++) {
if (tmp & 1) ctx++;
tmp >>= 1;
}
return ctx;
}
/* Global initialization */
static void ohci_initialize(struct ti_ohci *ohci)
{
quadlet_t buf;
int num_ports, i;
spin_lock_init(&ohci->phy_reg_lock);
/* Put some defaults to these undefined bus options */
buf = reg_read(ohci, OHCI1394_BusOptions);
buf |= 0x60000000; /* Enable CMC and ISC */
if (hpsb_disable_irm)
buf &= ~0x80000000;
else
buf |= 0x80000000; /* Enable IRMC */
buf &= ~0x00ff0000; /* XXX: Set cyc_clk_acc to zero for now */
buf &= ~0x18000000; /* Disable PMC and BMC */
reg_write(ohci, OHCI1394_BusOptions, buf);
/* Set the bus number */
reg_write(ohci, OHCI1394_NodeID, 0x0000ffc0);
/* Enable posted writes */
reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_postedWriteEnable);
/* Clear link control register */
reg_write(ohci, OHCI1394_LinkControlClear, 0xffffffff);
/* Enable cycle timer and cycle master and set the IRM
* contender bit in our self ID packets if appropriate. */
reg_write(ohci, OHCI1394_LinkControlSet,
OHCI1394_LinkControl_CycleTimerEnable |
OHCI1394_LinkControl_CycleMaster);
i = get_phy_reg(ohci, 4) | PHY_04_LCTRL;
if (hpsb_disable_irm)
i &= ~PHY_04_CONTENDER;
else
i |= PHY_04_CONTENDER;
set_phy_reg(ohci, 4, i);
/* Set up self-id dma buffer */
reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->selfid_buf_bus);
/* enable self-id and phys */
reg_write(ohci, OHCI1394_LinkControlSet, OHCI1394_LinkControl_RcvSelfID |
OHCI1394_LinkControl_RcvPhyPkt);
/* Set the Config ROM mapping register */
reg_write(ohci, OHCI1394_ConfigROMmap, ohci->csr_config_rom_bus);
/* Now get our max packet size */
ohci->max_packet_size =
1<<(((reg_read(ohci, OHCI1394_BusOptions)>>12)&0xf)+1);
/* Don't accept phy packets into AR request context */
reg_write(ohci, OHCI1394_LinkControlClear, 0x00000400);
/* Clear the interrupt mask */
reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 0xffffffff);
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 0xffffffff);
/* Clear the interrupt mask */
reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 0xffffffff);
reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 0xffffffff);
/* Initialize AR dma */
initialize_dma_rcv_ctx(&ohci->ar_req_context, 0);
initialize_dma_rcv_ctx(&ohci->ar_resp_context, 0);
/* Initialize AT dma */
initialize_dma_trm_ctx(&ohci->at_req_context);
initialize_dma_trm_ctx(&ohci->at_resp_context);
/* Initialize IR Legacy DMA channel mask */
ohci->ir_legacy_channels = 0;
/* Accept AR requests from all nodes */
reg_write(ohci, OHCI1394_AsReqFilterHiSet, 0x80000000);
/* Set the address range of the physical response unit.
* Most controllers do not implement it as a writable register though.
* They will keep a hardwired offset of 0x00010000 and show 0x0 as
* register content.
* To actually enable physical responses is the job of our interrupt
* handler which programs the physical request filter. */
reg_write(ohci, OHCI1394_PhyUpperBound,
OHCI1394_PHYS_UPPER_BOUND_PROGRAMMED >> 16);
DBGMSG("physUpperBoundOffset=%08x",
reg_read(ohci, OHCI1394_PhyUpperBound));
/* Specify AT retries */
reg_write(ohci, OHCI1394_ATRetries,
OHCI1394_MAX_AT_REQ_RETRIES |
(OHCI1394_MAX_AT_RESP_RETRIES<<4) |
(OHCI1394_MAX_PHYS_RESP_RETRIES<<8));
/* We don't want hardware swapping */
reg_write(ohci, OHCI1394_HCControlClear, OHCI1394_HCControl_noByteSwap);
/* Enable interrupts */
reg_write(ohci, OHCI1394_IntMaskSet,
OHCI1394_unrecoverableError |
OHCI1394_masterIntEnable |
OHCI1394_busReset |
OHCI1394_selfIDComplete |
OHCI1394_RSPkt |
OHCI1394_RQPkt |
OHCI1394_respTxComplete |
OHCI1394_reqTxComplete |
OHCI1394_isochRx |
OHCI1394_isochTx |
OHCI1394_postedWriteErr |
OHCI1394_cycleTooLong |
OHCI1394_cycleInconsistent);
/* Enable link */
reg_write(ohci, OHCI1394_HCControlSet, OHCI1394_HCControl_linkEnable);
buf = reg_read(ohci, OHCI1394_Version);
PRINT(KERN_INFO, "OHCI-1394 %d.%d (PCI): IRQ=[%d] "
"MMIO=[%llx-%llx] Max Packet=[%d] IR/IT contexts=[%d/%d]",
((((buf) >> 16) & 0xf) + (((buf) >> 20) & 0xf) * 10),
((((buf) >> 4) & 0xf) + ((buf) & 0xf) * 10), ohci->dev->irq,
(unsigned long long)pci_resource_start(ohci->dev, 0),
(unsigned long long)pci_resource_start(ohci->dev, 0) + OHCI1394_REGISTER_SIZE - 1,
ohci->max_packet_size,
ohci->nb_iso_rcv_ctx, ohci->nb_iso_xmit_ctx);
/* Check all of our ports to make sure that if anything is
* connected, we enable that port. */
num_ports = get_phy_reg(ohci, 2) & 0xf;
for (i = 0; i < num_ports; i++) {
unsigned int status;
set_phy_reg(ohci, 7, i);
status = get_phy_reg(ohci, 8);
if (status & 0x20)
set_phy_reg(ohci, 8, status & ~1);
}
/* Serial EEPROM Sanity check. */
if ((ohci->max_packet_size < 512) ||
(ohci->max_packet_size > 4096)) {
/* Serial EEPROM contents are suspect, set a sane max packet
* size and print the raw contents for bug reports if verbose
* debug is enabled. */
#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
int i;
#endif
PRINT(KERN_DEBUG, "Serial EEPROM has suspicious values, "
"attempting to setting max_packet_size to 512 bytes");
reg_write(ohci, OHCI1394_BusOptions,
(reg_read(ohci, OHCI1394_BusOptions) & 0xf007) | 0x8002);
ohci->max_packet_size = 512;
#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
PRINT(KERN_DEBUG, " EEPROM Present: %d",
(reg_read(ohci, OHCI1394_Version) >> 24) & 0x1);
reg_write(ohci, OHCI1394_GUID_ROM, 0x80000000);
for (i = 0;
((i < 1000) &&
(reg_read(ohci, OHCI1394_GUID_ROM) & 0x80000000)); i++)
udelay(10);
for (i = 0; i < 0x20; i++) {
reg_write(ohci, OHCI1394_GUID_ROM, 0x02000000);
PRINT(KERN_DEBUG, " EEPROM %02x: %02x", i,
(reg_read(ohci, OHCI1394_GUID_ROM) >> 16) & 0xff);
}
#endif
}
}
/*
* Insert a packet in the DMA fifo and generate the DMA prg
* FIXME: rewrite the program in order to accept packets crossing
* page boundaries.
* check also that a single dma descriptor doesn't cross a
* page boundary.
*/
static void insert_packet(struct ti_ohci *ohci,
struct dma_trm_ctx *d, struct hpsb_packet *packet)
{
u32 cycleTimer;
int idx = d->prg_ind;
DBGMSG("Inserting packet for node " NODE_BUS_FMT
", tlabel=%d, tcode=0x%x, speed=%d",
NODE_BUS_ARGS(ohci->host, packet->node_id), packet->tlabel,
packet->tcode, packet->speed_code);
d->prg_cpu[idx]->begin.address = 0;
d->prg_cpu[idx]->begin.branchAddress = 0;
if (d->type == DMA_CTX_ASYNC_RESP) {
/*
* For response packets, we need to put a timeout value in
* the 16 lower bits of the status... let's try 1 sec timeout
*/
cycleTimer = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
d->prg_cpu[idx]->begin.status = cpu_to_le32(
(((((cycleTimer>>25)&0x7)+1)&0x7)<<13) |
((cycleTimer&0x01fff000)>>12));
DBGMSG("cycleTimer: %08x timeStamp: %08x",
cycleTimer, d->prg_cpu[idx]->begin.status);
} else
d->prg_cpu[idx]->begin.status = 0;
if ( (packet->type == hpsb_async) || (packet->type == hpsb_raw) ) {
if (packet->type == hpsb_raw) {
d->prg_cpu[idx]->data[0] = cpu_to_le32(OHCI1394_TCODE_PHY<<4);
d->prg_cpu[idx]->data[1] = cpu_to_le32(packet->header[0]);
d->prg_cpu[idx]->data[2] = cpu_to_le32(packet->header[1]);
} else {
d->prg_cpu[idx]->data[0] = packet->speed_code<<16 |
(packet->header[0] & 0xFFFF);
if (packet->tcode == TCODE_ISO_DATA) {
/* Sending an async stream packet */
d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000;
} else {
/* Sending a normal async request or response */
d->prg_cpu[idx]->data[1] =
(packet->header[1] & 0xFFFF) |
(packet->header[0] & 0xFFFF0000);
d->prg_cpu[idx]->data[2] = packet->header[2];
d->prg_cpu[idx]->data[3] = packet->header[3];
}
header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode);
}
if (packet->data_size) { /* block transmit */
if (packet->tcode == TCODE_STREAM_DATA){
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_MORE |
DMA_CTL_IMMEDIATE | 0x8);
} else {
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_MORE |
DMA_CTL_IMMEDIATE | 0x10);
}
d->prg_cpu[idx]->end.control =
cpu_to_le32(DMA_CTL_OUTPUT_LAST |
DMA_CTL_IRQ |
DMA_CTL_BRANCH |
packet->data_size);
/*
* Check that the packet data buffer
* does not cross a page boundary.
*
* XXX Fix this some day. eth1394 seems to trigger
* it, but ignoring it doesn't seem to cause a
* problem.
*/
#if 0
if (cross_bound((unsigned long)packet->data,
packet->data_size)>0) {
/* FIXME: do something about it */
PRINT(KERN_ERR,
"%s: packet data addr: %p size %Zd bytes "
"cross page boundary", __FUNCTION__,
packet->data, packet->data_size);
}
#endif
d->prg_cpu[idx]->end.address = cpu_to_le32(
pci_map_single(ohci->dev, packet->data,
packet->data_size,
PCI_DMA_TODEVICE));
OHCI_DMA_ALLOC("single, block transmit packet");
d->prg_cpu[idx]->end.branchAddress = 0;
d->prg_cpu[idx]->end.status = 0;
if (d->branchAddrPtr)
*(d->branchAddrPtr) =
cpu_to_le32(d->prg_bus[idx] | 0x3);
d->branchAddrPtr =
&(d->prg_cpu[idx]->end.branchAddress);
} else { /* quadlet transmit */
if (packet->type == hpsb_raw)
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_LAST |
DMA_CTL_IMMEDIATE |
DMA_CTL_IRQ |
DMA_CTL_BRANCH |
(packet->header_size + 4));
else
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_LAST |
DMA_CTL_IMMEDIATE |
DMA_CTL_IRQ |
DMA_CTL_BRANCH |
packet->header_size);
if (d->branchAddrPtr)
*(d->branchAddrPtr) =
cpu_to_le32(d->prg_bus[idx] | 0x2);
d->branchAddrPtr =
&(d->prg_cpu[idx]->begin.branchAddress);
}
} else { /* iso packet */
d->prg_cpu[idx]->data[0] = packet->speed_code<<16 |
(packet->header[0] & 0xFFFF);
d->prg_cpu[idx]->data[1] = packet->header[0] & 0xFFFF0000;
header_le32_to_cpu(d->prg_cpu[idx]->data, packet->tcode);
d->prg_cpu[idx]->begin.control =
cpu_to_le32(DMA_CTL_OUTPUT_MORE |
DMA_CTL_IMMEDIATE | 0x8);
d->prg_cpu[idx]->end.control =
cpu_to_le32(DMA_CTL_OUTPUT_LAST |
DMA_CTL_UPDATE |
DMA_CTL_IRQ |
DMA_CTL_BRANCH |
packet->data_size);
d->prg_cpu[idx]->end.address = cpu_to_le32(
pci_map_single(ohci->dev, packet->data,
packet->data_size, PCI_DMA_TODEVICE));
OHCI_DMA_ALLOC("single, iso transmit packet");
d->prg_cpu[idx]->end.branchAddress = 0;
d->prg_cpu[idx]->end.status = 0;
DBGMSG("Iso xmit context info: header[%08x %08x]\n"
" begin=%08x %08x %08x %08x\n"
" %08x %08x %08x %08x\n"
" end =%08x %08x %08x %08x",
d->prg_cpu[idx]->data[0], d->prg_cpu[idx]->data[1],
d->prg_cpu[idx]->begin.control,
d->prg_cpu[idx]->begin.address,
d->prg_cpu[idx]->begin.branchAddress,
d->prg_cpu[idx]->begin.status,
d->prg_cpu[idx]->data[0],
d->prg_cpu[idx]->data[1],
d->prg_cpu[idx]->data[2],
d->prg_cpu[idx]->data[3],
d->prg_cpu[idx]->end.control,
d->prg_cpu[idx]->end.address,
d->prg_cpu[idx]->end.branchAddress,
d->prg_cpu[idx]->end.status);
if (d->branchAddrPtr)
*(d->branchAddrPtr) = cpu_to_le32(d->prg_bus[idx] | 0x3);
d->branchAddrPtr = &(d->prg_cpu[idx]->end.branchAddress);
}
d->free_prgs--;
/* queue the packet in the appropriate context queue */
list_add_tail(&packet->driver_list, &d->fifo_list);
d->prg_ind = (d->prg_ind + 1) % d->num_desc;
}
/*
* This function fills the FIFO with the (eventual) pending packets
* and runs or wakes up the DMA prg if necessary.
*
* The function MUST be called with the d->lock held.
*/
static void dma_trm_flush(struct ti_ohci *ohci, struct dma_trm_ctx *d)
{
struct hpsb_packet *packet, *ptmp;
int idx = d->prg_ind;
int z = 0;
/* insert the packets into the dma fifo */
list_for_each_entry_safe(packet, ptmp, &d->pending_list, driver_list) {
if (!d->free_prgs)
break;
/* For the first packet only */
if (!z)
z = (packet->data_size) ? 3 : 2;
/* Insert the packet */
list_del_init(&packet->driver_list);
insert_packet(ohci, d, packet);
}
/* Nothing must have been done, either no free_prgs or no packets */
if (z == 0)
return;
/* Is the context running ? (should be unless it is
the first packet to be sent in this context) */
if (!(reg_read(ohci, d->ctrlSet) & 0x8000)) {
u32 nodeId = reg_read(ohci, OHCI1394_NodeID);
DBGMSG("Starting transmit DMA ctx=%d",d->ctx);
reg_write(ohci, d->cmdPtr, d->prg_bus[idx] | z);
/* Check that the node id is valid, and not 63 */
if (!(nodeId & 0x80000000) || (nodeId & 0x3f) == 63)
PRINT(KERN_ERR, "Running dma failed because Node ID is not valid");
else
reg_write(ohci, d->ctrlSet, 0x8000);
} else {
/* Wake up the dma context if necessary */
if (!(reg_read(ohci, d->ctrlSet) & 0x400))
DBGMSG("Waking transmit DMA ctx=%d",d->ctx);
/* do this always, to avoid race condition */
reg_write(ohci, d->ctrlSet, 0x1000);
}
return;
}
/* Transmission of an async or iso packet */
static int ohci_transmit(struct hpsb_host *host, struct hpsb_packet *packet)
{
struct ti_ohci *ohci = host->hostdata;
struct dma_trm_ctx *d;
unsigned long flags;
if (packet->data_size > ohci->max_packet_size) {
PRINT(KERN_ERR,
"Transmit packet size %Zd is too big",
packet->data_size);
return -EOVERFLOW;
}
/* Decide whether we have an iso, a request, or a response packet */
if (packet->type == hpsb_raw)
d = &ohci->at_req_context;
else if ((packet->tcode == TCODE_ISO_DATA) && (packet->type == hpsb_iso)) {
/* The legacy IT DMA context is initialized on first
* use. However, the alloc cannot be run from
* interrupt context, so we bail out if that is the
* case. I don't see anyone sending ISO packets from
* interrupt context anyway... */
if (ohci->it_legacy_context.ohci == NULL) {
if (in_interrupt()) {
PRINT(KERN_ERR,
"legacy IT context cannot be initialized during interrupt");
return -EINVAL;
}
if (alloc_dma_trm_ctx(ohci, &ohci->it_legacy_context,
DMA_CTX_ISO, 0, IT_NUM_DESC,
OHCI1394_IsoXmitContextBase) < 0) {
PRINT(KERN_ERR,
"error initializing legacy IT context");
return -ENOMEM;
}
initialize_dma_trm_ctx(&ohci->it_legacy_context);
}
d = &ohci->it_legacy_context;
} else if ((packet->tcode & 0x02) && (packet->tcode != TCODE_ISO_DATA))
d = &ohci->at_resp_context;
else
d = &ohci->at_req_context;
spin_lock_irqsave(&d->lock,flags);
list_add_tail(&packet->driver_list, &d->pending_list);
dma_trm_flush(ohci, d);
spin_unlock_irqrestore(&d->lock,flags);
return 0;
}
static int ohci_devctl(struct hpsb_host *host, enum devctl_cmd cmd, int arg)
{
struct ti_ohci *ohci = host->hostdata;
int retval = 0;
unsigned long flags;
int phy_reg;
switch (cmd) {
case RESET_BUS:
switch (arg) {
case SHORT_RESET:
phy_reg = get_phy_reg(ohci, 5);
phy_reg |= 0x40;
set_phy_reg(ohci, 5, phy_reg); /* set ISBR */
break;
case LONG_RESET:
phy_reg = get_phy_reg(ohci, 1);
phy_reg |= 0x40;
set_phy_reg(ohci, 1, phy_reg); /* set IBR */
break;
case SHORT_RESET_NO_FORCE_ROOT:
phy_reg = get_phy_reg(ohci, 1);
if (phy_reg & 0x80) {
phy_reg &= ~0x80;
set_phy_reg(ohci, 1, phy_reg); /* clear RHB */
}
phy_reg = get_phy_reg(ohci, 5);
phy_reg |= 0x40;
set_phy_reg(ohci, 5, phy_reg); /* set ISBR */
break;
case LONG_RESET_NO_FORCE_ROOT:
phy_reg = get_phy_reg(ohci, 1);
phy_reg &= ~0x80;
phy_reg |= 0x40;
set_phy_reg(ohci, 1, phy_reg); /* clear RHB, set IBR */
break;
case SHORT_RESET_FORCE_ROOT:
phy_reg = get_phy_reg(ohci, 1);
if (!(phy_reg & 0x80)) {
phy_reg |= 0x80;
set_phy_reg(ohci, 1, phy_reg); /* set RHB */
}
phy_reg = get_phy_reg(ohci, 5);
phy_reg |= 0x40;
set_phy_reg(ohci, 5, phy_reg); /* set ISBR */
break;
case LONG_RESET_FORCE_ROOT:
phy_reg = get_phy_reg(ohci, 1);
phy_reg |= 0xc0;
set_phy_reg(ohci, 1, phy_reg); /* set RHB and IBR */
break;
default:
retval = -1;
}
break;
case GET_CYCLE_COUNTER:
retval = reg_read(ohci, OHCI1394_IsochronousCycleTimer);
break;
case SET_CYCLE_COUNTER:
reg_write(ohci, OHCI1394_IsochronousCycleTimer, arg);
break;