/*
* linux/drivers/char/synclink.c
*
- * $Id: synclink.c,v 4.28 2004/08/11 19:30:01 paulkf Exp $
+ * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $
*
* Device driver for Microgate SyncLink ISA and PCI
* high speed multiprotocol serial adapters.
#include <linux/termios.h>
#include <linux/workqueue.h>
#include <linux/hdlc.h>
+#include <linux/dma-mapping.h>
#ifdef CONFIG_HDLC_MODULE
#define CONFIG_HDLC 1
typedef struct _DMABUFFERENTRY
{
u32 phys_addr; /* 32-bit flat physical address of data buffer */
- u16 count; /* buffer size/data count */
- u16 status; /* Control/status field */
- u16 rcc; /* character count field */
+ volatile u16 count; /* buffer size/data count */
+ volatile u16 status; /* Control/status field */
+ volatile u16 rcc; /* character count field */
u16 reserved; /* padding required by 16C32 */
u32 link; /* 32-bit flat link to next buffer entry */
char *virt_addr; /* virtual address of data buffer */
u32 phys_entry; /* physical address of this buffer entry */
+ dma_addr_t dma_addr;
} DMABUFFERENTRY, *DMAPBUFFERENTRY;
/* The queue of BH actions to be performed */
int count; /* count of opens */
int line;
int hw_version;
- unsigned int close_delay;
- unsigned int closing_wait; /* time to wait before closing */
+ unsigned short close_delay;
+ unsigned short closing_wait; /* time to wait before closing */
struct mgsl_icount icount;
int ri_chkcount;
char *buffer_list; /* virtual address of Rx & Tx buffer lists */
- unsigned long buffer_list_phys;
+ u32 buffer_list_phys;
+ dma_addr_t buffer_list_dma_addr;
unsigned int rx_buffer_count; /* count of total allocated Rx buffers */
DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */
module_param_array(txholdbufs, int, NULL, 0);
static char *driver_name = "SyncLink serial driver";
-static char *driver_version = "$Revision: 4.28 $";
+static char *driver_version = "$Revision: 4.38 $";
static int synclink_init_one (struct pci_dev *dev,
const struct pci_device_id *ent);
return mgsl_get_text_ptr;
}
-/*
- * tmp_buf is used as a temporary buffer by mgsl_write. We need to
- * lock it in case the COPY_FROM_USER blocks while swapping in a page,
- * and some other program tries to do a serial write at the same time.
- * Since the lock will only come under contention when the system is
- * swapping and available memory is low, it makes sense to share one
- * buffer across all the serial ioports, since it significantly saves
- * memory if large numbers of serial ports are open.
- */
-static unsigned char *tmp_buf;
-static DECLARE_MUTEX(tmp_buf_sem);
-
static inline int mgsl_paranoia_check(struct mgsl_struct *info,
char *name, const char *routine)
{
{
int Fifocount;
u16 status;
+ int work = 0;
unsigned char DataByte;
struct tty_struct *tty = info->tty;
struct mgsl_icount *icount = &info->icount;
/* flush the receive FIFO */
while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) {
+ int flag;
+
/* read one byte from RxFIFO */
outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY),
info->io_base + CCAR );
RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) )
usc_UnlatchRxstatusBits(info,RXSTATUS_ALL);
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- continue;
-
- *tty->flip.char_buf_ptr = DataByte;
icount->rx++;
- *tty->flip.flag_buf_ptr = 0;
+ flag = 0;
if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR +
RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) {
printk("rxerr=%04X\n",status);
status &= info->read_status_mask;
if (status & RXSTATUS_BREAK_RECEIVED) {
- *tty->flip.flag_buf_ptr = TTY_BREAK;
+ flag = TTY_BREAK;
if (info->flags & ASYNC_SAK)
do_SAK(tty);
} else if (status & RXSTATUS_PARITY_ERROR)
- *tty->flip.flag_buf_ptr = TTY_PARITY;
+ flag = TTY_PARITY;
else if (status & RXSTATUS_FRAMING_ERROR)
- *tty->flip.flag_buf_ptr = TTY_FRAME;
- if (status & RXSTATUS_OVERRUN) {
- /* Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- if (tty->flip.count < TTY_FLIPBUF_SIZE) {
- tty->flip.count++;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- *tty->flip.flag_buf_ptr = TTY_OVERRUN;
- }
- }
+ flag = TTY_FRAME;
} /* end of if (error) */
-
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
+ tty_insert_flip_char(tty, DataByte, flag);
+ if (status & RXSTATUS_OVERRUN) {
+ /* Overrun is special, since it's
+ * reported immediately, and doesn't
+ * affect the current character
+ */
+ work += tty_insert_flip_char(tty, 0, TTY_OVERRUN);
+ }
}
if ( debug_level >= DEBUG_LEVEL_ISR ) {
- printk("%s(%d):mgsl_isr_receive_data flip count=%d\n",
- __FILE__,__LINE__,tty->flip.count);
printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n",
__FILE__,__LINE__,icount->rx,icount->brk,
icount->parity,icount->frame,icount->overrun);
}
- if ( tty->flip.count )
+ if(work)
tty_flip_buffer_push(tty);
}
info->pending_bh = 0;
+ memset(&info->icount, 0, sizeof(info->icount));
+
init_timer(&info->tx_timer);
info->tx_timer.data = (unsigned long)info;
info->tx_timer.function = mgsl_tx_timeout;
if (mgsl_paranoia_check(info, tty->name, "mgsl_write"))
goto cleanup;
- if (!tty || !info->xmit_buf || !tmp_buf)
+ if (!tty || !info->xmit_buf)
goto cleanup;
if ( info->params.mode == MGSL_MODE_HDLC ||
printk("%s(%d):mgsl_get_params(%s)\n",
__FILE__,__LINE__, info->device_name);
- COPY_TO_USER(err,user_icount, &info->icount, sizeof(struct mgsl_icount));
- if (err) {
- if ( debug_level >= DEBUG_LEVEL_INFO )
- printk( "%s(%d):mgsl_get_stats(%s) user buffer copy failed\n",
- __FILE__,__LINE__,info->device_name);
- return -EFAULT;
+ if (!user_icount) {
+ memset(&info->icount, 0, sizeof(info->icount));
+ } else {
+ COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount));
+ if (err)
+ return -EFAULT;
}
return 0;
{
struct mgsl_struct *info;
int retval, line;
- unsigned long page;
unsigned long flags;
/* verify range of specified line number */
goto cleanup;
}
- if (!tmp_buf) {
- page = get_zeroed_page(GFP_KERNEL);
- if (!page) {
- retval = -ENOMEM;
- goto cleanup;
- }
- if (tmp_buf)
- free_page(page);
- else
- tmp_buf = (unsigned char *) page;
- }
-
info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
spin_lock_irqsave(&info->netlock, flags);
/* inspect portions of the buffer while other portions are being */
/* updated by the adapter using Bus Master DMA. */
- info->buffer_list = kmalloc(BUFFERLISTSIZE, GFP_KERNEL | GFP_DMA);
- if ( info->buffer_list == NULL )
+ info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL);
+ if (info->buffer_list == NULL)
return -ENOMEM;
-
- info->buffer_list_phys = isa_virt_to_bus(info->buffer_list);
+ info->buffer_list_phys = (u32)(info->buffer_list_dma_addr);
}
/* We got the memory for the buffer entry lists. */
*/
static void mgsl_free_buffer_list_memory( struct mgsl_struct *info )
{
- if ( info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI )
- kfree(info->buffer_list);
+ if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI)
+ dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr);
info->buffer_list = NULL;
info->rx_buffer_list = NULL;
static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount)
{
int i;
- unsigned long phys_addr;
+ u32 phys_addr;
/* Allocate page sized buffers for the receive buffer list */
info->last_mem_alloc += DMABUFFERSIZE;
} else {
/* ISA adapter uses system memory. */
- BufferList[i].virt_addr =
- kmalloc(DMABUFFERSIZE, GFP_KERNEL | GFP_DMA);
- if ( BufferList[i].virt_addr == NULL )
+ BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL);
+ if (BufferList[i].virt_addr == NULL)
return -ENOMEM;
- phys_addr = isa_virt_to_bus(BufferList[i].virt_addr);
+ phys_addr = (u32)(BufferList[i].dma_addr);
}
BufferList[i].phys_addr = phys_addr;
}
for ( i = 0 ; i < Buffercount ; i++ ) {
if ( BufferList[i].virt_addr ) {
if ( info->bus_type != MGSL_BUS_TYPE_PCI )
- kfree(BufferList[i].virt_addr);
+ dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr);
BufferList[i].virt_addr = NULL;
}
}
*/
static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info)
{
- if ( info->intermediate_rxbuffer )
- kfree(info->intermediate_rxbuffer);
-
+ kfree(info->intermediate_rxbuffer);
info->intermediate_rxbuffer = NULL;
} /* end of mgsl_free_intermediate_rxbuffer_memory() */
int i;
for ( i=0; i<info->num_tx_holding_buffers; ++i ) {
- if ( info->tx_holding_buffers[i].buffer ) {
- kfree(info->tx_holding_buffers[i].buffer);
- info->tx_holding_buffers[i].buffer=NULL;
- }
+ kfree(info->tx_holding_buffers[i].buffer);
+ info->tx_holding_buffers[i].buffer = NULL;
}
info->get_tx_holding_index = 0;
kfree(tmp);
}
- if (tmp_buf) {
- free_page((unsigned long) tmp_buf);
- tmp_buf = NULL;
- }
-
if (pci_registered)
pci_unregister_driver(&synclink_pci_driver);
}
* <15..8> ? RxFIFO IRQ Request Level
*
* Note: For async mode the receive FIFO level must be set
- * to 0 to aviod the situation where the FIFO contains fewer bytes
+ * to 0 to avoid the situation where the FIFO contains fewer bytes
* than the trigger level and no more data is expected.
*
* <7> 0 Exited Hunt IA (Interrupt Arm)
usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12));
}
+ if (info->params.loopback) {
+ info->loopback_bits = 0x300;
+ outw(0x0300, info->io_base + CCAR);
+ }
+
} /* end of usc_set_async_mode() */
/* usc_loopback_frame()
{
static unsigned short BitPatterns[] =
{ 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f };
- static unsigned int Patterncount = sizeof(BitPatterns)/sizeof(unsigned short);
+ static unsigned int Patterncount = ARRAY_SIZE(BitPatterns);
unsigned int i;
BOOLEAN rc = TRUE;
unsigned long flags;
*/
static BOOLEAN mgsl_memory_test( struct mgsl_struct *info )
{
- static unsigned long BitPatterns[] = { 0x0, 0x55555555, 0xaaaaaaaa,
- 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
- unsigned long Patterncount = sizeof(BitPatterns)/sizeof(unsigned long);
+ static unsigned long BitPatterns[] =
+ { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 };
+ unsigned long Patterncount = ARRAY_SIZE(BitPatterns);
unsigned long i;
unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long);
unsigned long * TestAddr;
}
info->params.encoding = new_encoding;
- info->params.crc_type = new_crctype;;
+ info->params.crc_type = new_crctype;
/* if network interface up, reprogram hardware */
if (info->netcount)
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