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icom.c
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/*
* icom.c
*
* Copyright (C) 2001 IBM Corporation. All rights reserved.
*
* Serial device driver.
*
* Based on code from serial.c
*
* 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
*
*/
#define SERIAL_DO_RESTART
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/signal.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/termios.h>
#include <linux/fs.h>
#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/major.h>
#include <linux/string.h>
#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/spinlock.h>
#include <linux/kobject.h>
#include <linux/firmware.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "icom.h"
/*#define ICOM_TRACE enable port trace capabilities */
#define ICOM_DRIVER_NAME "icom"
#define ICOM_VERSION_STR "1.3.1"
#define NR_PORTS 128
#define ICOM_PORT ((struct icom_port *)port)
#define to_icom_adapter(d) container_of(d, struct icom_adapter, kobj)
static const struct pci_device_id icom_pci_table[] = {
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.driver_data = ADAPTER_V1,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
.driver_data = ADAPTER_V2,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
.driver_data = ADAPTER_V2,
},
{
.vendor = PCI_VENDOR_ID_IBM,
.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
.driver_data = ADAPTER_V2,
},
{}
};
struct lookup_proc_table start_proc[4] = {
{NULL, ICOM_CONTROL_START_A},
{NULL, ICOM_CONTROL_START_B},
{NULL, ICOM_CONTROL_START_C},
{NULL, ICOM_CONTROL_START_D}
};
struct lookup_proc_table stop_proc[4] = {
{NULL, ICOM_CONTROL_STOP_A},
{NULL, ICOM_CONTROL_STOP_B},
{NULL, ICOM_CONTROL_STOP_C},
{NULL, ICOM_CONTROL_STOP_D}
};
struct lookup_int_table int_mask_tbl[4] = {
{NULL, ICOM_INT_MASK_PRC_A},
{NULL, ICOM_INT_MASK_PRC_B},
{NULL, ICOM_INT_MASK_PRC_C},
{NULL, ICOM_INT_MASK_PRC_D},
};
MODULE_DEVICE_TABLE(pci, icom_pci_table);
static LIST_HEAD(icom_adapter_head);
/* spinlock for adapter initialization and changing adapter operations */
static spinlock_t icom_lock;
#ifdef ICOM_TRACE
static inline void trace(struct icom_port *, char *, unsigned long) {};
#else
static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
#endif
static void free_port_memory(struct icom_port *icom_port)
{
struct pci_dev *dev = icom_port->adapter->pci_dev;
trace(icom_port, "RET_PORT_MEM", 0);
if (icom_port->recv_buf) {
pci_free_consistent(dev, 4096, icom_port->recv_buf,
icom_port->recv_buf_pci);
icom_port->recv_buf = NULL;
}
if (icom_port->xmit_buf) {
pci_free_consistent(dev, 4096, icom_port->xmit_buf,
icom_port->xmit_buf_pci);
icom_port->xmit_buf = NULL;
}
if (icom_port->statStg) {
pci_free_consistent(dev, 4096, icom_port->statStg,
icom_port->statStg_pci);
icom_port->statStg = NULL;
}
if (icom_port->xmitRestart) {
pci_free_consistent(dev, 4096, icom_port->xmitRestart,
icom_port->xmitRestart_pci);
icom_port->xmitRestart = NULL;
}
}
static int __devinit get_port_memory(struct icom_port *icom_port)
{
int index;
unsigned long stgAddr;
unsigned long startStgAddr;
unsigned long offset;
struct pci_dev *dev = icom_port->adapter->pci_dev;
icom_port->xmit_buf =
pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
if (!icom_port->xmit_buf) {
dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->xmit_buf);
icom_port->recv_buf =
pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
if (!icom_port->recv_buf) {
dev_err(&dev->dev, "Can not allocate Receive buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->recv_buf);
icom_port->statStg =
pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
if (!icom_port->statStg) {
dev_err(&dev->dev, "Can not allocate Status buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
trace(icom_port, "GET_PORT_MEM",
(unsigned long) icom_port->statStg);
icom_port->xmitRestart =
pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
if (!icom_port->xmitRestart) {
dev_err(&dev->dev,
"Can not allocate xmit Restart buffer\n");
free_port_memory(icom_port);
return -ENOMEM;
}
memset(icom_port->statStg, 0, 4096);
/* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
indicates that frames are to be transmitted
*/
stgAddr = (unsigned long) icom_port->statStg;
for (index = 0; index < NUM_XBUFFS; index++) {
trace(icom_port, "FOD_ADDR", stgAddr);
stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
if (index < (NUM_XBUFFS - 1)) {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
icom_port->statStg->xmit[index].leLengthASD =
(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
trace(icom_port, "FOD_ADDR", stgAddr);
trace(icom_port, "FOD_XBUFF",
(unsigned long) icom_port->xmit_buf);
icom_port->statStg->xmit[index].leBuffer =
cpu_to_le32(icom_port->xmit_buf_pci);
} else if (index == (NUM_XBUFFS - 1)) {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
icom_port->statStg->xmit[index].leLengthASD =
(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
trace(icom_port, "FOD_XBUFF",
(unsigned long) icom_port->xmit_buf);
icom_port->statStg->xmit[index].leBuffer =
cpu_to_le32(icom_port->xmit_buf_pci);
} else {
memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
}
}
/* FIDs */
startStgAddr = stgAddr;
/* fill in every entry, even if no buffer */
for (index = 0; index < NUM_RBUFFS; index++) {
trace(icom_port, "FID_ADDR", stgAddr);
stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
icom_port->statStg->rcv[index].leLength = 0;
icom_port->statStg->rcv[index].WorkingLength =
(unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
if (index < (NUM_RBUFFS - 1) ) {
offset = stgAddr - (unsigned long) icom_port->statStg;
icom_port->statStg->rcv[index].leNext =
cpu_to_le32(icom_port-> statStg_pci + offset);
trace(icom_port, "FID_RBUFF",
(unsigned long) icom_port->recv_buf);
icom_port->statStg->rcv[index].leBuffer =
cpu_to_le32(icom_port->recv_buf_pci);
} else if (index == (NUM_RBUFFS -1) ) {
offset = startStgAddr - (unsigned long) icom_port->statStg;
icom_port->statStg->rcv[index].leNext =
cpu_to_le32(icom_port-> statStg_pci + offset);
trace(icom_port, "FID_RBUFF",
(unsigned long) icom_port->recv_buf + 2048);
icom_port->statStg->rcv[index].leBuffer =
cpu_to_le32(icom_port->recv_buf_pci + 2048);
} else {
icom_port->statStg->rcv[index].leNext = 0;
icom_port->statStg->rcv[index].leBuffer = 0;
}
}
return 0;
}
static void stop_processor(struct icom_port *icom_port)
{
unsigned long temp;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
stop_proc[port].global_control_reg = &icom_port->global_reg->control;
else
stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
if (port < 4) {
temp = readl(stop_proc[port].global_control_reg);
temp =
(temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
writel(temp, stop_proc[port].global_control_reg);
/* write flush */
readl(stop_proc[port].global_control_reg);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
}
static void start_processor(struct icom_port *icom_port)
{
unsigned long temp;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
start_proc[port].global_control_reg = &icom_port->global_reg->control;
else
start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
if (port < 4) {
temp = readl(start_proc[port].global_control_reg);
temp =
(temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
writel(temp, start_proc[port].global_control_reg);
/* write flush */
readl(start_proc[port].global_control_reg);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
}
static void load_code(struct icom_port *icom_port)
{
const struct firmware *fw;
char __iomem *iram_ptr;
int index;
int status = 0;
void __iomem *dram_ptr = icom_port->dram;
dma_addr_t temp_pci;
unsigned char *new_page = NULL;
unsigned char cable_id = NO_CABLE;
struct pci_dev *dev = icom_port->adapter->pci_dev;
/* Clear out any pending interrupts */
writew(0x3FFF, icom_port->int_reg);
trace(icom_port, "CLEAR_INTERRUPTS", 0);
/* Stop processor */
stop_processor(icom_port);
/* Zero out DRAM */
memset_io(dram_ptr, 0, 512);
/* Load Call Setup into Adapter */
if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_DCE_IRAM_OFFSET) {
dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
for (index = 0; index < fw->size; index++)
writeb(fw->data[index], &iram_ptr[index]);
release_firmware(fw);
/* Load Resident DCE portion of Adapter */
if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_IRAM_SIZE) {
dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
writeb(fw->data[index], &iram_ptr[index]);
release_firmware(fw);
/* Set Hardware level */
if ((icom_port->adapter->version | ADAPTER_V2) == ADAPTER_V2)
writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
/* Start the processor in Adapter */
start_processor(icom_port);
writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
&(icom_port->dram->HDLCConfigReg));
writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
writeb(0x00, &(icom_port->dram->CmdReg));
writeb(0x10, &(icom_port->dram->async_config3));
writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
/*Set up data in icom DRAM to indicate where personality
*code is located and its length.
*/
new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
if (!new_page) {
dev_err(&dev->dev, "Can not allocate DMA buffer\n");
status = -1;
goto load_code_exit;
}
if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
status = -1;
goto load_code_exit;
}
if (fw->size > ICOM_DCE_IRAM_OFFSET) {
dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
release_firmware(fw);
status = -1;
goto load_code_exit;
}
for (index = 0; index < fw->size; index++)
new_page[index] = fw->data[index];
release_firmware(fw);
writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
writel(temp_pci, &icom_port->dram->mac_load_addr);
/*Setting the syncReg to 0x80 causes adapter to start downloading
the personality code into adapter instruction RAM.
Once code is loaded, it will begin executing and, based on
information provided above, will start DMAing data from
shared memory to adapter DRAM.
*/
/* the wait loop below verifies this write operation has been done
and processed
*/
writeb(START_DOWNLOAD, &icom_port->dram->sync);
/* Wait max 1 Sec for data download and processor to start */
for (index = 0; index < 10; index++) {
msleep(100);
if (readb(&icom_port->dram->misc_flags) & ICOM_HDW_ACTIVE)
break;
}
if (index == 10)
status = -1;
/*
* check Cable ID
*/
cable_id = readb(&icom_port->dram->cable_id);
if (cable_id & ICOM_CABLE_ID_VALID) {
/* Get cable ID into the lower 4 bits (standard form) */
cable_id = (cable_id & ICOM_CABLE_ID_MASK) >> 4;
icom_port->cable_id = cable_id;
} else {
dev_err(&dev->dev,"Invalid or no cable attached\n");
icom_port->cable_id = NO_CABLE;
}
load_code_exit:
if (status != 0) {
/* Clear out any pending interrupts */
writew(0x3FFF, icom_port->int_reg);
/* Turn off port */
writeb(ICOM_DISABLE, &(icom_port->dram->disable));
/* Stop processor */
stop_processor(icom_port);
dev_err(&icom_port->adapter->pci_dev->dev,"Port not opertional\n");
}
if (new_page != NULL)
pci_free_consistent(dev, 4096, new_page, temp_pci);
}
static int startup(struct icom_port *icom_port)
{
unsigned long temp;
unsigned char cable_id, raw_cable_id;
unsigned long flags;
int port;
trace(icom_port, "STARTUP", 0);
if (!icom_port->dram) {
/* should NEVER be NULL */
dev_err(&icom_port->adapter->pci_dev->dev,
"Unusable Port, port configuration missing\n");
return -ENODEV;
}
/*
* check Cable ID
*/
raw_cable_id = readb(&icom_port->dram->cable_id);
trace(icom_port, "CABLE_ID", raw_cable_id);
/* Get cable ID into the lower 4 bits (standard form) */
cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
/* Check for valid Cable ID */
if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
(cable_id != icom_port->cable_id)) {
/* reload adapter code, pick up any potential changes in cable id */
load_code(icom_port);
/* still no sign of cable, error out */
raw_cable_id = readb(&icom_port->dram->cable_id);
cable_id = (raw_cable_id & ICOM_CABLE_ID_MASK) >> 4;
if (!(raw_cable_id & ICOM_CABLE_ID_VALID) ||
(icom_port->cable_id == NO_CABLE))
return -EIO;
}
/*
* Finally, clear and enable interrupts
*/
spin_lock_irqsave(&icom_lock, flags);
port = icom_port->port;
if (port == 0 || port == 1)
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
else
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
if (port == 0 || port == 2)
writew(0x00FF, icom_port->int_reg);
else
writew(0x3F00, icom_port->int_reg);
if (port < 4) {
temp = readl(int_mask_tbl[port].global_int_mask);
writel(temp & ~int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
/* write flush */
readl(int_mask_tbl[port].global_int_mask);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
return 0;
}
static void shutdown(struct icom_port *icom_port)
{
unsigned long temp;
unsigned char cmdReg;
unsigned long flags;
int port;
spin_lock_irqsave(&icom_lock, flags);
trace(icom_port, "SHUTDOWN", 0);
/*
* disable all interrupts
*/
port = icom_port->port;
if (port == 0 || port == 1)
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask;
else
int_mask_tbl[port].global_int_mask = &icom_port->global_reg->int_mask_2;
if (port < 4) {
temp = readl(int_mask_tbl[port].global_int_mask);
writel(temp | int_mask_tbl[port].processor_id, int_mask_tbl[port].global_int_mask);
/* write flush */
readl(int_mask_tbl[port].global_int_mask);
} else {
dev_err(&icom_port->adapter->pci_dev->dev,
"Invalid port assignment\n");
}
spin_unlock_irqrestore(&icom_lock, flags);
/*
* disable break condition
*/
cmdReg = readb(&icom_port->dram->CmdReg);
if ((cmdReg | CMD_SND_BREAK) == CMD_SND_BREAK) {
writeb(cmdReg & ~CMD_SND_BREAK, &icom_port->dram->CmdReg);
}
}
static int icom_write(struct uart_port *port)
{
unsigned long data_count;
unsigned char cmdReg;
unsigned long offset;
int temp_tail = port->info->xmit.tail;
trace(ICOM_PORT, "WRITE", 0);
if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
SA_FLAGS_READY_TO_XMIT) {
trace(ICOM_PORT, "WRITE_FULL", 0);
return 0;
}
data_count = 0;
while ((port->info->xmit.head != temp_tail) &&
(data_count <= XMIT_BUFF_SZ)) {
ICOM_PORT->xmit_buf[data_count++] =
port->info->xmit.buf[temp_tail];
temp_tail++;
temp_tail &= (UART_XMIT_SIZE - 1);
}
if (data_count) {
ICOM_PORT->statStg->xmit[0].flags =
cpu_to_le16(SA_FLAGS_READY_TO_XMIT);
ICOM_PORT->statStg->xmit[0].leLength =
cpu_to_le16(data_count);
offset =
(unsigned long) &ICOM_PORT->statStg->xmit[0] -
(unsigned long) ICOM_PORT->statStg;
*ICOM_PORT->xmitRestart =
cpu_to_le32(ICOM_PORT->statStg_pci + offset);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
writeb(cmdReg | CMD_XMIT_RCV_ENABLE,
&ICOM_PORT->dram->CmdReg);
writeb(START_XMIT, &ICOM_PORT->dram->StartXmitCmd);
trace(ICOM_PORT, "WRITE_START", data_count);
/* write flush */
readb(&ICOM_PORT->dram->StartXmitCmd);
}
return data_count;
}
static inline void check_modem_status(struct icom_port *icom_port)
{
static char old_status = 0;
char delta_status;
unsigned char status;
spin_lock(&icom_port->uart_port.lock);
/*modem input register */
status = readb(&icom_port->dram->isr);
trace(icom_port, "CHECK_MODEM", status);
delta_status = status ^ old_status;
if (delta_status) {
if (delta_status & ICOM_RI)
icom_port->uart_port.icount.rng++;
if (delta_status & ICOM_DSR)
icom_port->uart_port.icount.dsr++;
if (delta_status & ICOM_DCD)
uart_handle_dcd_change(&icom_port->uart_port,
delta_status & ICOM_DCD);
if (delta_status & ICOM_CTS)
uart_handle_cts_change(&icom_port->uart_port,
delta_status & ICOM_CTS);
wake_up_interruptible(&icom_port->uart_port.info->
delta_msr_wait);
old_status = status;
}
spin_unlock(&icom_port->uart_port.lock);
}
static void xmit_interrupt(u16 port_int_reg, struct icom_port *icom_port)
{
unsigned short int count;
int i;
if (port_int_reg & (INT_XMIT_COMPLETED)) {
trace(icom_port, "XMIT_COMPLETE", 0);
/* clear buffer in use bit */
icom_port->statStg->xmit[0].flags &=
cpu_to_le16(~SA_FLAGS_READY_TO_XMIT);
count = (unsigned short int)
cpu_to_le16(icom_port->statStg->xmit[0].leLength);
icom_port->uart_port.icount.tx += count;
for (i=0; i<count &&
!uart_circ_empty(&icom_port->uart_port.info->xmit); i++) {
icom_port->uart_port.info->xmit.tail++;
icom_port->uart_port.info->xmit.tail &=
(UART_XMIT_SIZE - 1);
}
if (!icom_write(&icom_port->uart_port))
/* activate write queue */
uart_write_wakeup(&icom_port->uart_port);
} else
trace(icom_port, "XMIT_DISABLED", 0);
}
static void recv_interrupt(u16 port_int_reg, struct icom_port *icom_port)
{
short int count, rcv_buff;
struct tty_struct *tty = icom_port->uart_port.info->tty;
unsigned short int status;
struct uart_icount *icount;
unsigned long offset;
unsigned char flag;
trace(icom_port, "RCV_COMPLETE", 0);
rcv_buff = icom_port->next_rcv;
status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
while (status & SA_FL_RCV_DONE) {
int first = -1;
trace(icom_port, "FID_STATUS", status);
count = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].leLength);
count = tty_buffer_request_room(tty, count);
trace(icom_port, "RCV_COUNT", count);
trace(icom_port, "REAL_COUNT", count);
offset =
cpu_to_le32(icom_port->statStg->rcv[rcv_buff].leBuffer) -
icom_port->recv_buf_pci;
/* Block copy all but the last byte as this may have status */
if (count > 0) {
first = icom_port->recv_buf[offset];
tty_insert_flip_string(tty, icom_port->recv_buf + offset, count - 1);
}
icount = &icom_port->uart_port.icount;
icount->rx += count;
/* Break detect logic */
if ((status & SA_FLAGS_FRAME_ERROR)
&& first == 0) {
status &= ~SA_FLAGS_FRAME_ERROR;
status |= SA_FLAGS_BREAK_DET;
trace(icom_port, "BREAK_DET", 0);
}
flag = TTY_NORMAL;
if (status &
(SA_FLAGS_BREAK_DET | SA_FLAGS_PARITY_ERROR |
SA_FLAGS_FRAME_ERROR | SA_FLAGS_OVERRUN)) {
if (status & SA_FLAGS_BREAK_DET)
icount->brk++;
if (status & SA_FLAGS_PARITY_ERROR)
icount->parity++;
if (status & SA_FLAGS_FRAME_ERROR)
icount->frame++;
if (status & SA_FLAGS_OVERRUN)
icount->overrun++;
/*
* Now check to see if character should be
* ignored, and mask off conditions which
* should be ignored.
*/
if (status & icom_port->ignore_status_mask) {
trace(icom_port, "IGNORE_CHAR", 0);
goto ignore_char;
}
status &= icom_port->read_status_mask;
if (status & SA_FLAGS_BREAK_DET) {
flag = TTY_BREAK;
} else if (status & SA_FLAGS_PARITY_ERROR) {
trace(icom_port, "PARITY_ERROR", 0);
flag = TTY_PARITY;
} else if (status & SA_FLAGS_FRAME_ERROR)
flag = TTY_FRAME;
}
tty_insert_flip_char(tty, *(icom_port->recv_buf + offset + count - 1), flag);
if (status & SA_FLAGS_OVERRUN)
/*
* Overrun is special, since it's
* reported immediately, and doesn't
* affect the current character
*/
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
ignore_char:
icom_port->statStg->rcv[rcv_buff].flags = 0;
icom_port->statStg->rcv[rcv_buff].leLength = 0;
icom_port->statStg->rcv[rcv_buff].WorkingLength =
(unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
rcv_buff++;
if (rcv_buff == NUM_RBUFFS)
rcv_buff = 0;
status = cpu_to_le16(icom_port->statStg->rcv[rcv_buff].flags);
}
icom_port->next_rcv = rcv_buff;
tty_flip_buffer_push(tty);
}
static void process_interrupt(u16 port_int_reg,
struct icom_port *icom_port)
{
spin_lock(&icom_port->uart_port.lock);
trace(icom_port, "INTERRUPT", port_int_reg);
if (port_int_reg & (INT_XMIT_COMPLETED | INT_XMIT_DISABLED))
xmit_interrupt(port_int_reg, icom_port);
if (port_int_reg & INT_RCV_COMPLETED)
recv_interrupt(port_int_reg, icom_port);
spin_unlock(&icom_port->uart_port.lock);
}
static irqreturn_t icom_interrupt(int irq, void *dev_id)
{
void __iomem * int_reg;
u32 adapter_interrupts;
u16 port_int_reg;
struct icom_adapter *icom_adapter;
struct icom_port *icom_port;
/* find icom_port for this interrupt */
icom_adapter = (struct icom_adapter *) dev_id;
if ((icom_adapter->version | ADAPTER_V2) == ADAPTER_V2) {
int_reg = icom_adapter->base_addr + 0x8024;
adapter_interrupts = readl(int_reg);
if (adapter_interrupts & 0x00003FFF) {
/* port 2 interrupt, NOTE: for all ADAPTER_V2, port 2 will be active */
icom_port = &icom_adapter->port_info[2];
port_int_reg = (u16) adapter_interrupts;
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
if (adapter_interrupts & 0x3FFF0000) {
/* port 3 interrupt */
icom_port = &icom_adapter->port_info[3];
if (icom_port->status == ICOM_PORT_ACTIVE) {
port_int_reg =
(u16) (adapter_interrupts >> 16);
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
}
/* Clear out any pending interrupts */
writel(adapter_interrupts, int_reg);
int_reg = icom_adapter->base_addr + 0x8004;
} else {
int_reg = icom_adapter->base_addr + 0x4004;
}
adapter_interrupts = readl(int_reg);
if (adapter_interrupts & 0x00003FFF) {
/* port 0 interrupt, NOTE: for all adapters, port 0 will be active */
icom_port = &icom_adapter->port_info[0];
port_int_reg = (u16) adapter_interrupts;
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
if (adapter_interrupts & 0x3FFF0000) {
/* port 1 interrupt */
icom_port = &icom_adapter->port_info[1];
if (icom_port->status == ICOM_PORT_ACTIVE) {
port_int_reg = (u16) (adapter_interrupts >> 16);
process_interrupt(port_int_reg, icom_port);
check_modem_status(icom_port);
}
}
/* Clear out any pending interrupts */
writel(adapter_interrupts, int_reg);
/* flush the write */
adapter_interrupts = readl(int_reg);
return IRQ_HANDLED;
}
/*
* ------------------------------------------------------------------
* Begin serial-core API
* ------------------------------------------------------------------
*/
static unsigned int icom_tx_empty(struct uart_port *port)
{
int ret;
unsigned long flags;
spin_lock_irqsave(&port->lock, flags);
if (cpu_to_le16(ICOM_PORT->statStg->xmit[0].flags) &
SA_FLAGS_READY_TO_XMIT)
ret = TIOCSER_TEMT;
else
ret = 0;
spin_unlock_irqrestore(&port->lock, flags);
return ret;
}
static void icom_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
unsigned char local_osr;
trace(ICOM_PORT, "SET_MODEM", 0);
local_osr = readb(&ICOM_PORT->dram->osr);
if (mctrl & TIOCM_RTS) {
trace(ICOM_PORT, "RAISE_RTS", 0);
local_osr |= ICOM_RTS;
} else {
trace(ICOM_PORT, "LOWER_RTS", 0);
local_osr &= ~ICOM_RTS;
}
if (mctrl & TIOCM_DTR) {
trace(ICOM_PORT, "RAISE_DTR", 0);
local_osr |= ICOM_DTR;
} else {
trace(ICOM_PORT, "LOWER_DTR", 0);
local_osr &= ~ICOM_DTR;
}
writeb(local_osr, &ICOM_PORT->dram->osr);
}
static unsigned int icom_get_mctrl(struct uart_port *port)
{
unsigned char status;
unsigned int result;
trace(ICOM_PORT, "GET_MODEM", 0);
status = readb(&ICOM_PORT->dram->isr);
result = ((status & ICOM_DCD) ? TIOCM_CAR : 0)
| ((status & ICOM_RI) ? TIOCM_RNG : 0)
| ((status & ICOM_DSR) ? TIOCM_DSR : 0)
| ((status & ICOM_CTS) ? TIOCM_CTS : 0);
return result;
}
static void icom_stop_tx(struct uart_port *port)
{
unsigned char cmdReg;
trace(ICOM_PORT, "STOP", 0);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
writeb(cmdReg | CMD_HOLD_XMIT, &ICOM_PORT->dram->CmdReg);
}
static void icom_start_tx(struct uart_port *port)
{
unsigned char cmdReg;
trace(ICOM_PORT, "START", 0);
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
if ((cmdReg & CMD_HOLD_XMIT) == CMD_HOLD_XMIT)
writeb(cmdReg & ~CMD_HOLD_XMIT,
&ICOM_PORT->dram->CmdReg);
icom_write(port);
}