1648 lines
42 KiB
C
1648 lines
42 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* icom.c
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*
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* Copyright (C) 2001 IBM Corporation. All rights reserved.
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*
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* Serial device driver.
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*
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* Based on code from serial.c
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/signal.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/termios.h>
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#include <linux/fs.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/serial_reg.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/ptrace.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/vmalloc.h>
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#include <linux/smp.h>
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#include <linux/spinlock.h>
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#include <linux/kref.h>
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#include <linux/firmware.h>
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#include <linux/bitops.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <linux/uaccess.h>
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#include "icom.h"
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/*#define ICOM_TRACE enable port trace capabilities */
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#define ICOM_DRIVER_NAME "icom"
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#define ICOM_VERSION_STR "1.3.1"
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#define NR_PORTS 128
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#define ICOM_PORT ((struct icom_port *)port)
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#define to_icom_adapter(d) container_of(d, struct icom_adapter, kref)
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static const struct pci_device_id icom_pci_table[] = {
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{
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.vendor = PCI_VENDOR_ID_IBM,
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.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_1,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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.driver_data = ADAPTER_V1,
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},
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{
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.vendor = PCI_VENDOR_ID_IBM,
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.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
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.subvendor = PCI_VENDOR_ID_IBM,
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.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_TWO_PORTS_RVX,
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.driver_data = ADAPTER_V2,
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},
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{
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.vendor = PCI_VENDOR_ID_IBM,
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.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
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.subvendor = PCI_VENDOR_ID_IBM,
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.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM,
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.driver_data = ADAPTER_V2,
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},
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{
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.vendor = PCI_VENDOR_ID_IBM,
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.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
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.subvendor = PCI_VENDOR_ID_IBM,
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.subdevice = PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL,
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.driver_data = ADAPTER_V2,
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},
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{
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.vendor = PCI_VENDOR_ID_IBM,
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.device = PCI_DEVICE_ID_IBM_ICOM_DEV_ID_2,
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.subvendor = PCI_VENDOR_ID_IBM,
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.subdevice = PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM_PCIE,
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.driver_data = ADAPTER_V2,
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},
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{}
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};
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static struct lookup_proc_table start_proc[4] = {
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{NULL, ICOM_CONTROL_START_A},
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{NULL, ICOM_CONTROL_START_B},
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{NULL, ICOM_CONTROL_START_C},
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{NULL, ICOM_CONTROL_START_D}
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};
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static struct lookup_proc_table stop_proc[4] = {
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{NULL, ICOM_CONTROL_STOP_A},
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{NULL, ICOM_CONTROL_STOP_B},
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{NULL, ICOM_CONTROL_STOP_C},
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{NULL, ICOM_CONTROL_STOP_D}
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};
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static struct lookup_int_table int_mask_tbl[4] = {
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{NULL, ICOM_INT_MASK_PRC_A},
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{NULL, ICOM_INT_MASK_PRC_B},
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{NULL, ICOM_INT_MASK_PRC_C},
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{NULL, ICOM_INT_MASK_PRC_D},
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};
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MODULE_DEVICE_TABLE(pci, icom_pci_table);
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static LIST_HEAD(icom_adapter_head);
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/* spinlock for adapter initialization and changing adapter operations */
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static spinlock_t icom_lock;
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#ifdef ICOM_TRACE
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static inline void trace(struct icom_port *icom_port, char *trace_pt,
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unsigned long trace_data)
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{
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dev_info(&icom_port->adapter->pci_dev->dev, ":%d:%s - %lx\n",
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icom_port->port, trace_pt, trace_data);
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}
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#else
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static inline void trace(struct icom_port *icom_port, char *trace_pt, unsigned long trace_data) {};
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#endif
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static void icom_kref_release(struct kref *kref);
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static void free_port_memory(struct icom_port *icom_port)
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{
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struct pci_dev *dev = icom_port->adapter->pci_dev;
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trace(icom_port, "RET_PORT_MEM", 0);
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if (icom_port->recv_buf) {
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pci_free_consistent(dev, 4096, icom_port->recv_buf,
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icom_port->recv_buf_pci);
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icom_port->recv_buf = NULL;
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}
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if (icom_port->xmit_buf) {
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pci_free_consistent(dev, 4096, icom_port->xmit_buf,
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icom_port->xmit_buf_pci);
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icom_port->xmit_buf = NULL;
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}
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if (icom_port->statStg) {
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pci_free_consistent(dev, 4096, icom_port->statStg,
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icom_port->statStg_pci);
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icom_port->statStg = NULL;
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}
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if (icom_port->xmitRestart) {
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pci_free_consistent(dev, 4096, icom_port->xmitRestart,
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icom_port->xmitRestart_pci);
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icom_port->xmitRestart = NULL;
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}
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}
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static int get_port_memory(struct icom_port *icom_port)
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{
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int index;
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unsigned long stgAddr;
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unsigned long startStgAddr;
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unsigned long offset;
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struct pci_dev *dev = icom_port->adapter->pci_dev;
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icom_port->xmit_buf =
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pci_alloc_consistent(dev, 4096, &icom_port->xmit_buf_pci);
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if (!icom_port->xmit_buf) {
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dev_err(&dev->dev, "Can not allocate Transmit buffer\n");
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return -ENOMEM;
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}
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trace(icom_port, "GET_PORT_MEM",
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(unsigned long) icom_port->xmit_buf);
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icom_port->recv_buf =
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pci_alloc_consistent(dev, 4096, &icom_port->recv_buf_pci);
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if (!icom_port->recv_buf) {
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dev_err(&dev->dev, "Can not allocate Receive buffer\n");
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free_port_memory(icom_port);
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return -ENOMEM;
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}
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trace(icom_port, "GET_PORT_MEM",
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(unsigned long) icom_port->recv_buf);
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icom_port->statStg =
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pci_alloc_consistent(dev, 4096, &icom_port->statStg_pci);
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if (!icom_port->statStg) {
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dev_err(&dev->dev, "Can not allocate Status buffer\n");
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free_port_memory(icom_port);
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return -ENOMEM;
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}
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trace(icom_port, "GET_PORT_MEM",
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(unsigned long) icom_port->statStg);
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icom_port->xmitRestart =
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pci_alloc_consistent(dev, 4096, &icom_port->xmitRestart_pci);
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if (!icom_port->xmitRestart) {
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dev_err(&dev->dev,
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"Can not allocate xmit Restart buffer\n");
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free_port_memory(icom_port);
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return -ENOMEM;
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}
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memset(icom_port->statStg, 0, 4096);
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/* FODs: Frame Out Descriptor Queue, this is a FIFO queue that
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indicates that frames are to be transmitted
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*/
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stgAddr = (unsigned long) icom_port->statStg;
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for (index = 0; index < NUM_XBUFFS; index++) {
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trace(icom_port, "FOD_ADDR", stgAddr);
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stgAddr = stgAddr + sizeof(icom_port->statStg->xmit[0]);
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if (index < (NUM_XBUFFS - 1)) {
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memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
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icom_port->statStg->xmit[index].leLengthASD =
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(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
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trace(icom_port, "FOD_ADDR", stgAddr);
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trace(icom_port, "FOD_XBUFF",
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(unsigned long) icom_port->xmit_buf);
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icom_port->statStg->xmit[index].leBuffer =
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cpu_to_le32(icom_port->xmit_buf_pci);
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} else if (index == (NUM_XBUFFS - 1)) {
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memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
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icom_port->statStg->xmit[index].leLengthASD =
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(unsigned short int) cpu_to_le16(XMIT_BUFF_SZ);
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trace(icom_port, "FOD_XBUFF",
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(unsigned long) icom_port->xmit_buf);
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icom_port->statStg->xmit[index].leBuffer =
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cpu_to_le32(icom_port->xmit_buf_pci);
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} else {
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memset(&icom_port->statStg->xmit[index], 0, sizeof(struct xmit_status_area));
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}
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}
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/* FIDs */
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startStgAddr = stgAddr;
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/* fill in every entry, even if no buffer */
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for (index = 0; index < NUM_RBUFFS; index++) {
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trace(icom_port, "FID_ADDR", stgAddr);
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stgAddr = stgAddr + sizeof(icom_port->statStg->rcv[0]);
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icom_port->statStg->rcv[index].leLength = 0;
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icom_port->statStg->rcv[index].WorkingLength =
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(unsigned short int) cpu_to_le16(RCV_BUFF_SZ);
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if (index < (NUM_RBUFFS - 1) ) {
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offset = stgAddr - (unsigned long) icom_port->statStg;
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icom_port->statStg->rcv[index].leNext =
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cpu_to_le32(icom_port-> statStg_pci + offset);
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trace(icom_port, "FID_RBUFF",
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(unsigned long) icom_port->recv_buf);
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icom_port->statStg->rcv[index].leBuffer =
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cpu_to_le32(icom_port->recv_buf_pci);
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} else if (index == (NUM_RBUFFS -1) ) {
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offset = startStgAddr - (unsigned long) icom_port->statStg;
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icom_port->statStg->rcv[index].leNext =
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cpu_to_le32(icom_port-> statStg_pci + offset);
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trace(icom_port, "FID_RBUFF",
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(unsigned long) icom_port->recv_buf + 2048);
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icom_port->statStg->rcv[index].leBuffer =
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cpu_to_le32(icom_port->recv_buf_pci + 2048);
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} else {
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icom_port->statStg->rcv[index].leNext = 0;
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icom_port->statStg->rcv[index].leBuffer = 0;
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}
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}
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return 0;
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}
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static void stop_processor(struct icom_port *icom_port)
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{
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unsigned long temp;
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unsigned long flags;
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int port;
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spin_lock_irqsave(&icom_lock, flags);
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port = icom_port->port;
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if (port >= ARRAY_SIZE(stop_proc)) {
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dev_err(&icom_port->adapter->pci_dev->dev,
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"Invalid port assignment\n");
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goto unlock;
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}
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if (port == 0 || port == 1)
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stop_proc[port].global_control_reg = &icom_port->global_reg->control;
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else
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stop_proc[port].global_control_reg = &icom_port->global_reg->control_2;
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temp = readl(stop_proc[port].global_control_reg);
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temp = (temp & ~start_proc[port].processor_id) | stop_proc[port].processor_id;
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writel(temp, stop_proc[port].global_control_reg);
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/* write flush */
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readl(stop_proc[port].global_control_reg);
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unlock:
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spin_unlock_irqrestore(&icom_lock, flags);
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}
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static void start_processor(struct icom_port *icom_port)
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{
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unsigned long temp;
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unsigned long flags;
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int port;
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spin_lock_irqsave(&icom_lock, flags);
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port = icom_port->port;
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if (port >= ARRAY_SIZE(start_proc)) {
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dev_err(&icom_port->adapter->pci_dev->dev,
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"Invalid port assignment\n");
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goto unlock;
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}
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if (port == 0 || port == 1)
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start_proc[port].global_control_reg = &icom_port->global_reg->control;
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else
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start_proc[port].global_control_reg = &icom_port->global_reg->control_2;
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temp = readl(start_proc[port].global_control_reg);
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temp = (temp & ~stop_proc[port].processor_id) | start_proc[port].processor_id;
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writel(temp, start_proc[port].global_control_reg);
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/* write flush */
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readl(start_proc[port].global_control_reg);
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unlock:
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spin_unlock_irqrestore(&icom_lock, flags);
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}
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static void load_code(struct icom_port *icom_port)
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{
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const struct firmware *fw;
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char __iomem *iram_ptr;
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int index;
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int status = 0;
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void __iomem *dram_ptr = icom_port->dram;
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dma_addr_t temp_pci;
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unsigned char *new_page = NULL;
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unsigned char cable_id = NO_CABLE;
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struct pci_dev *dev = icom_port->adapter->pci_dev;
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/* Clear out any pending interrupts */
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writew(0x3FFF, icom_port->int_reg);
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trace(icom_port, "CLEAR_INTERRUPTS", 0);
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/* Stop processor */
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stop_processor(icom_port);
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/* Zero out DRAM */
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memset_io(dram_ptr, 0, 512);
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/* Load Call Setup into Adapter */
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if (request_firmware(&fw, "icom_call_setup.bin", &dev->dev) < 0) {
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dev_err(&dev->dev,"Unable to load icom_call_setup.bin firmware image\n");
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status = -1;
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goto load_code_exit;
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}
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if (fw->size > ICOM_DCE_IRAM_OFFSET) {
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dev_err(&dev->dev, "Invalid firmware image for icom_call_setup.bin found.\n");
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release_firmware(fw);
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status = -1;
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goto load_code_exit;
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}
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iram_ptr = (char __iomem *)icom_port->dram + ICOM_IRAM_OFFSET;
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for (index = 0; index < fw->size; index++)
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writeb(fw->data[index], &iram_ptr[index]);
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release_firmware(fw);
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/* Load Resident DCE portion of Adapter */
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if (request_firmware(&fw, "icom_res_dce.bin", &dev->dev) < 0) {
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dev_err(&dev->dev,"Unable to load icom_res_dce.bin firmware image\n");
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status = -1;
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goto load_code_exit;
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}
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if (fw->size > ICOM_IRAM_SIZE) {
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dev_err(&dev->dev, "Invalid firmware image for icom_res_dce.bin found.\n");
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release_firmware(fw);
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status = -1;
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goto load_code_exit;
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}
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iram_ptr = (char __iomem *) icom_port->dram + ICOM_IRAM_OFFSET;
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for (index = ICOM_DCE_IRAM_OFFSET; index < fw->size; index++)
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writeb(fw->data[index], &iram_ptr[index]);
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release_firmware(fw);
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/* Set Hardware level */
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if (icom_port->adapter->version == ADAPTER_V2)
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writeb(V2_HARDWARE, &(icom_port->dram->misc_flags));
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/* Start the processor in Adapter */
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start_processor(icom_port);
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writeb((HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL),
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&(icom_port->dram->HDLCConfigReg));
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writeb(0x04, &(icom_port->dram->FlagFillIdleTimer)); /* 0.5 seconds */
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writeb(0x00, &(icom_port->dram->CmdReg));
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writeb(0x10, &(icom_port->dram->async_config3));
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writeb((ICOM_ACFG_DRIVE1 | ICOM_ACFG_NO_PARITY | ICOM_ACFG_8BPC |
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ICOM_ACFG_1STOP_BIT), &(icom_port->dram->async_config2));
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/*Set up data in icom DRAM to indicate where personality
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*code is located and its length.
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*/
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new_page = pci_alloc_consistent(dev, 4096, &temp_pci);
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if (!new_page) {
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dev_err(&dev->dev, "Can not allocate DMA buffer\n");
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status = -1;
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goto load_code_exit;
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}
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if (request_firmware(&fw, "icom_asc.bin", &dev->dev) < 0) {
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dev_err(&dev->dev,"Unable to load icom_asc.bin firmware image\n");
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status = -1;
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goto load_code_exit;
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}
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if (fw->size > ICOM_DCE_IRAM_OFFSET) {
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dev_err(&dev->dev, "Invalid firmware image for icom_asc.bin found.\n");
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release_firmware(fw);
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status = -1;
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goto load_code_exit;
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}
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for (index = 0; index < fw->size; index++)
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new_page[index] = fw->data[index];
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writeb((char) ((fw->size + 16)/16), &icom_port->dram->mac_length);
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writel(temp_pci, &icom_port->dram->mac_load_addr);
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release_firmware(fw);
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/*Setting the syncReg to 0x80 causes adapter to start downloading
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the personality code into adapter instruction RAM.
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Once code is loaded, it will begin executing and, based on
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information provided above, will start DMAing data from
|
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shared memory to adapter DRAM.
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*/
|
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/* the wait loop below verifies this write operation has been done
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and processed
|
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*/
|
|
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 operational\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 >= ARRAY_SIZE(int_mask_tbl)) {
|
|
dev_err(&icom_port->adapter->pci_dev->dev,
|
|
"Invalid port assignment\n");
|
|
goto unlock;
|
|
}
|
|
|
|
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);
|
|
|
|
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);
|
|
|
|
unlock:
|
|
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 >= ARRAY_SIZE(int_mask_tbl)) {
|
|
dev_err(&icom_port->adapter->pci_dev->dev,
|
|
"Invalid port assignment\n");
|
|
goto unlock;
|
|
}
|
|
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;
|
|
|
|
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);
|
|
|
|
unlock:
|
|
spin_unlock_irqrestore(&icom_lock, flags);
|
|
|
|
/*
|
|
* disable break condition
|
|
*/
|
|
cmdReg = readb(&icom_port->dram->CmdReg);
|
|
if (cmdReg & 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->state->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->state->xmit.head != temp_tail) &&
|
|
(data_count <= XMIT_BUFF_SZ)) {
|
|
|
|
ICOM_PORT->xmit_buf[data_count++] =
|
|
port->state->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.state->
|
|
port.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.state->xmit); i++) {
|
|
|
|
icom_port->uart_port.state->xmit.tail++;
|
|
icom_port->uart_port.state->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_port *port = &icom_port->uart_port.state->port;
|
|
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);
|
|
|
|
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(port, 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(port, *(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(port, 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;
|
|
|
|
spin_unlock(&icom_port->uart_port.lock);
|
|
tty_flip_buffer_push(port);
|
|
spin_lock(&icom_port->uart_port.lock);
|
|
}
|
|
|
|
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) {
|
|
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);
|
|
}
|
|
|
|
static void icom_send_xchar(struct uart_port *port, char ch)
|
|
{
|
|
unsigned char xdata;
|
|
int index;
|
|
unsigned long flags;
|
|
|
|
trace(ICOM_PORT, "SEND_XCHAR", ch);
|
|
|
|
/* wait .1 sec to send char */
|
|
for (index = 0; index < 10; index++) {
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
xdata = readb(&ICOM_PORT->dram->xchar);
|
|
if (xdata == 0x00) {
|
|
trace(ICOM_PORT, "QUICK_WRITE", 0);
|
|
writeb(ch, &ICOM_PORT->dram->xchar);
|
|
|
|
/* flush write operation */
|
|
xdata = readb(&ICOM_PORT->dram->xchar);
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
msleep(10);
|
|
}
|
|
}
|
|
|
|
static void icom_stop_rx(struct uart_port *port)
|
|
{
|
|
unsigned char cmdReg;
|
|
|
|
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
|
|
writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
|
|
}
|
|
|
|
static void icom_break(struct uart_port *port, int break_state)
|
|
{
|
|
unsigned char cmdReg;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
trace(ICOM_PORT, "BREAK", 0);
|
|
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
|
|
if (break_state == -1) {
|
|
writeb(cmdReg | CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
|
|
} else {
|
|
writeb(cmdReg & ~CMD_SND_BREAK, &ICOM_PORT->dram->CmdReg);
|
|
}
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static int icom_open(struct uart_port *port)
|
|
{
|
|
int retval;
|
|
|
|
kref_get(&ICOM_PORT->adapter->kref);
|
|
retval = startup(ICOM_PORT);
|
|
|
|
if (retval) {
|
|
kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
|
|
trace(ICOM_PORT, "STARTUP_ERROR", 0);
|
|
return retval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void icom_close(struct uart_port *port)
|
|
{
|
|
unsigned char cmdReg;
|
|
|
|
trace(ICOM_PORT, "CLOSE", 0);
|
|
|
|
/* stop receiver */
|
|
cmdReg = readb(&ICOM_PORT->dram->CmdReg);
|
|
writeb(cmdReg & ~CMD_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
|
|
|
|
shutdown(ICOM_PORT);
|
|
|
|
kref_put(&ICOM_PORT->adapter->kref, icom_kref_release);
|
|
}
|
|
|
|
static void icom_set_termios(struct uart_port *port,
|
|
struct ktermios *termios,
|
|
struct ktermios *old_termios)
|
|
{
|
|
int baud;
|
|
unsigned cflag, iflag;
|
|
char new_config2;
|
|
char new_config3 = 0;
|
|
char tmp_byte;
|
|
int index;
|
|
int rcv_buff, xmit_buff;
|
|
unsigned long offset;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
trace(ICOM_PORT, "CHANGE_SPEED", 0);
|
|
|
|
cflag = termios->c_cflag;
|
|
iflag = termios->c_iflag;
|
|
|
|
new_config2 = ICOM_ACFG_DRIVE1;
|
|
|
|
/* byte size and parity */
|
|
switch (cflag & CSIZE) {
|
|
case CS5: /* 5 bits/char */
|
|
new_config2 |= ICOM_ACFG_5BPC;
|
|
break;
|
|
case CS6: /* 6 bits/char */
|
|
new_config2 |= ICOM_ACFG_6BPC;
|
|
break;
|
|
case CS7: /* 7 bits/char */
|
|
new_config2 |= ICOM_ACFG_7BPC;
|
|
break;
|
|
case CS8: /* 8 bits/char */
|
|
new_config2 |= ICOM_ACFG_8BPC;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (cflag & CSTOPB) {
|
|
/* 2 stop bits */
|
|
new_config2 |= ICOM_ACFG_2STOP_BIT;
|
|
}
|
|
if (cflag & PARENB) {
|
|
/* parity bit enabled */
|
|
new_config2 |= ICOM_ACFG_PARITY_ENAB;
|
|
trace(ICOM_PORT, "PARENB", 0);
|
|
}
|
|
if (cflag & PARODD) {
|
|
/* odd parity */
|
|
new_config2 |= ICOM_ACFG_PARITY_ODD;
|
|
trace(ICOM_PORT, "PARODD", 0);
|
|
}
|
|
|
|
/* Determine divisor based on baud rate */
|
|
baud = uart_get_baud_rate(port, termios, old_termios,
|
|
icom_acfg_baud[0],
|
|
icom_acfg_baud[BAUD_TABLE_LIMIT]);
|
|
if (!baud)
|
|
baud = 9600; /* B0 transition handled in rs_set_termios */
|
|
|
|
for (index = 0; index < BAUD_TABLE_LIMIT; index++) {
|
|
if (icom_acfg_baud[index] == baud) {
|
|
new_config3 = index;
|
|
break;
|
|
}
|
|
}
|
|
|
|
uart_update_timeout(port, cflag, baud);
|
|
|
|
/* CTS flow control flag and modem status interrupts */
|
|
tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
|
|
if (cflag & CRTSCTS)
|
|
tmp_byte |= HDLC_HDW_FLOW;
|
|
else
|
|
tmp_byte &= ~HDLC_HDW_FLOW;
|
|
writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
|
|
|
|
/*
|
|
* Set up parity check flag
|
|
*/
|
|
ICOM_PORT->read_status_mask = SA_FLAGS_OVERRUN | SA_FL_RCV_DONE;
|
|
if (iflag & INPCK)
|
|
ICOM_PORT->read_status_mask |=
|
|
SA_FLAGS_FRAME_ERROR | SA_FLAGS_PARITY_ERROR;
|
|
|
|
if ((iflag & BRKINT) || (iflag & PARMRK))
|
|
ICOM_PORT->read_status_mask |= SA_FLAGS_BREAK_DET;
|
|
|
|
/*
|
|
* Characters to ignore
|
|
*/
|
|
ICOM_PORT->ignore_status_mask = 0;
|
|
if (iflag & IGNPAR)
|
|
ICOM_PORT->ignore_status_mask |=
|
|
SA_FLAGS_PARITY_ERROR | SA_FLAGS_FRAME_ERROR;
|
|
if (iflag & IGNBRK) {
|
|
ICOM_PORT->ignore_status_mask |= SA_FLAGS_BREAK_DET;
|
|
/*
|
|
* If we're ignore parity and break indicators, ignore
|
|
* overruns too. (For real raw support).
|
|
*/
|
|
if (iflag & IGNPAR)
|
|
ICOM_PORT->ignore_status_mask |= SA_FLAGS_OVERRUN;
|
|
}
|
|
|
|
/*
|
|
* !!! ignore all characters if CREAD is not set
|
|
*/
|
|
if ((cflag & CREAD) == 0)
|
|
ICOM_PORT->ignore_status_mask |= SA_FL_RCV_DONE;
|
|
|
|
/* Turn off Receiver to prepare for reset */
|
|
writeb(CMD_RCV_DISABLE, &ICOM_PORT->dram->CmdReg);
|
|
|
|
for (index = 0; index < 10; index++) {
|
|
if (readb(&ICOM_PORT->dram->PrevCmdReg) == 0x00) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* clear all current buffers of data */
|
|
for (rcv_buff = 0; rcv_buff < NUM_RBUFFS; rcv_buff++) {
|
|
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);
|
|
}
|
|
|
|
for (xmit_buff = 0; xmit_buff < NUM_XBUFFS; xmit_buff++) {
|
|
ICOM_PORT->statStg->xmit[xmit_buff].flags = 0;
|
|
}
|
|
|
|
/* activate changes and start xmit and receiver here */
|
|
/* Enable the receiver */
|
|
writeb(new_config3, &(ICOM_PORT->dram->async_config3));
|
|
writeb(new_config2, &(ICOM_PORT->dram->async_config2));
|
|
tmp_byte = readb(&(ICOM_PORT->dram->HDLCConfigReg));
|
|
tmp_byte |= HDLC_PPP_PURE_ASYNC | HDLC_FF_FILL;
|
|
writeb(tmp_byte, &(ICOM_PORT->dram->HDLCConfigReg));
|
|
writeb(0x04, &(ICOM_PORT->dram->FlagFillIdleTimer)); /* 0.5 seconds */
|
|
writeb(0xFF, &(ICOM_PORT->dram->ier)); /* enable modem signal interrupts */
|
|
|
|
/* reset processor */
|
|
writeb(CMD_RESTART, &ICOM_PORT->dram->CmdReg);
|
|
|
|
for (index = 0; index < 10; index++) {
|
|
if (readb(&ICOM_PORT->dram->CmdReg) == 0x00) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Enable Transmitter and Receiver */
|
|
offset =
|
|
(unsigned long) &ICOM_PORT->statStg->rcv[0] -
|
|
(unsigned long) ICOM_PORT->statStg;
|
|
writel(ICOM_PORT->statStg_pci + offset,
|
|
&ICOM_PORT->dram->RcvStatusAddr);
|
|
ICOM_PORT->next_rcv = 0;
|
|
ICOM_PORT->put_length = 0;
|
|
*ICOM_PORT->xmitRestart = 0;
|
|
writel(ICOM_PORT->xmitRestart_pci,
|
|
&ICOM_PORT->dram->XmitStatusAddr);
|
|
trace(ICOM_PORT, "XR_ENAB", 0);
|
|
writeb(CMD_XMIT_RCV_ENABLE, &ICOM_PORT->dram->CmdReg);
|
|
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
}
|
|
|
|
static const char *icom_type(struct uart_port *port)
|
|
{
|
|
return "icom";
|
|
}
|
|
|
|
static void icom_release_port(struct uart_port *port)
|
|
{
|
|
}
|
|
|
|
static int icom_request_port(struct uart_port *port)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void icom_config_port(struct uart_port *port, int flags)
|
|
{
|
|
port->type = PORT_ICOM;
|
|
}
|
|
|
|
static const struct uart_ops icom_ops = {
|
|
.tx_empty = icom_tx_empty,
|
|
.set_mctrl = icom_set_mctrl,
|
|
.get_mctrl = icom_get_mctrl,
|
|
.stop_tx = icom_stop_tx,
|
|
.start_tx = icom_start_tx,
|
|
.send_xchar = icom_send_xchar,
|
|
.stop_rx = icom_stop_rx,
|
|
.break_ctl = icom_break,
|
|
.startup = icom_open,
|
|
.shutdown = icom_close,
|
|
.set_termios = icom_set_termios,
|
|
.type = icom_type,
|
|
.release_port = icom_release_port,
|
|
.request_port = icom_request_port,
|
|
.config_port = icom_config_port,
|
|
};
|
|
|
|
#define ICOM_CONSOLE NULL
|
|
|
|
static struct uart_driver icom_uart_driver = {
|
|
.owner = THIS_MODULE,
|
|
.driver_name = ICOM_DRIVER_NAME,
|
|
.dev_name = "ttyA",
|
|
.major = ICOM_MAJOR,
|
|
.minor = ICOM_MINOR_START,
|
|
.nr = NR_PORTS,
|
|
.cons = ICOM_CONSOLE,
|
|
};
|
|
|
|
static int icom_init_ports(struct icom_adapter *icom_adapter)
|
|
{
|
|
u32 subsystem_id = icom_adapter->subsystem_id;
|
|
int i;
|
|
struct icom_port *icom_port;
|
|
|
|
if (icom_adapter->version == ADAPTER_V1) {
|
|
icom_adapter->numb_ports = 2;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
icom_port = &icom_adapter->port_info[i];
|
|
icom_port->port = i;
|
|
icom_port->status = ICOM_PORT_ACTIVE;
|
|
icom_port->imbed_modem = ICOM_UNKNOWN;
|
|
}
|
|
} else {
|
|
if (subsystem_id == PCI_DEVICE_ID_IBM_ICOM_FOUR_PORT_MODEL) {
|
|
icom_adapter->numb_ports = 4;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
icom_port = &icom_adapter->port_info[i];
|
|
|
|
icom_port->port = i;
|
|
icom_port->status = ICOM_PORT_ACTIVE;
|
|
icom_port->imbed_modem = ICOM_IMBED_MODEM;
|
|
}
|
|
} else {
|
|
icom_adapter->numb_ports = 4;
|
|
|
|
icom_adapter->port_info[0].port = 0;
|
|
icom_adapter->port_info[0].status = ICOM_PORT_ACTIVE;
|
|
|
|
if (subsystem_id ==
|
|
PCI_DEVICE_ID_IBM_ICOM_V2_ONE_PORT_RVX_ONE_PORT_MDM) {
|
|
icom_adapter->port_info[0].imbed_modem = ICOM_IMBED_MODEM;
|
|
} else {
|
|
icom_adapter->port_info[0].imbed_modem = ICOM_RVX;
|
|
}
|
|
|
|
icom_adapter->port_info[1].status = ICOM_PORT_OFF;
|
|
|
|
icom_adapter->port_info[2].port = 2;
|
|
icom_adapter->port_info[2].status = ICOM_PORT_ACTIVE;
|
|
icom_adapter->port_info[2].imbed_modem = ICOM_RVX;
|
|
icom_adapter->port_info[3].status = ICOM_PORT_OFF;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void icom_port_active(struct icom_port *icom_port, struct icom_adapter *icom_adapter, int port_num)
|
|
{
|
|
if (icom_adapter->version == ADAPTER_V1) {
|
|
icom_port->global_reg = icom_adapter->base_addr + 0x4000;
|
|
icom_port->int_reg = icom_adapter->base_addr +
|
|
0x4004 + 2 - 2 * port_num;
|
|
} else {
|
|
icom_port->global_reg = icom_adapter->base_addr + 0x8000;
|
|
if (icom_port->port < 2)
|
|
icom_port->int_reg = icom_adapter->base_addr +
|
|
0x8004 + 2 - 2 * icom_port->port;
|
|
else
|
|
icom_port->int_reg = icom_adapter->base_addr +
|
|
0x8024 + 2 - 2 * (icom_port->port - 2);
|
|
}
|
|
}
|
|
static int icom_load_ports(struct icom_adapter *icom_adapter)
|
|
{
|
|
struct icom_port *icom_port;
|
|
int port_num;
|
|
|
|
for (port_num = 0; port_num < icom_adapter->numb_ports; port_num++) {
|
|
|
|
icom_port = &icom_adapter->port_info[port_num];
|
|
|
|
if (icom_port->status == ICOM_PORT_ACTIVE) {
|
|
icom_port_active(icom_port, icom_adapter, port_num);
|
|
icom_port->dram = icom_adapter->base_addr +
|
|
0x2000 * icom_port->port;
|
|
|
|
icom_port->adapter = icom_adapter;
|
|
|
|
/* get port memory */
|
|
if (get_port_memory(icom_port) != 0) {
|
|
dev_err(&icom_port->adapter->pci_dev->dev,
|
|
"Memory allocation for port FAILED\n");
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int icom_alloc_adapter(struct icom_adapter
|
|
**icom_adapter_ref)
|
|
{
|
|
int adapter_count = 0;
|
|
struct icom_adapter *icom_adapter;
|
|
struct icom_adapter *cur_adapter_entry;
|
|
struct list_head *tmp;
|
|
|
|
icom_adapter = kzalloc(sizeof(struct icom_adapter), GFP_KERNEL);
|
|
|
|
if (!icom_adapter) {
|
|
return -ENOMEM;
|
|
}
|
|
|
|
list_for_each(tmp, &icom_adapter_head) {
|
|
cur_adapter_entry =
|
|
list_entry(tmp, struct icom_adapter,
|
|
icom_adapter_entry);
|
|
if (cur_adapter_entry->index != adapter_count) {
|
|
break;
|
|
}
|
|
adapter_count++;
|
|
}
|
|
|
|
icom_adapter->index = adapter_count;
|
|
list_add_tail(&icom_adapter->icom_adapter_entry, tmp);
|
|
|
|
*icom_adapter_ref = icom_adapter;
|
|
return 0;
|
|
}
|
|
|
|
static void icom_free_adapter(struct icom_adapter *icom_adapter)
|
|
{
|
|
list_del(&icom_adapter->icom_adapter_entry);
|
|
kfree(icom_adapter);
|
|
}
|
|
|
|
static void icom_remove_adapter(struct icom_adapter *icom_adapter)
|
|
{
|
|
struct icom_port *icom_port;
|
|
int index;
|
|
|
|
for (index = 0; index < icom_adapter->numb_ports; index++) {
|
|
icom_port = &icom_adapter->port_info[index];
|
|
|
|
if (icom_port->status == ICOM_PORT_ACTIVE) {
|
|
dev_info(&icom_adapter->pci_dev->dev,
|
|
"Device removed\n");
|
|
|
|
uart_remove_one_port(&icom_uart_driver,
|
|
&icom_port->uart_port);
|
|
|
|
/* be sure that DTR and RTS are dropped */
|
|
writeb(0x00, &icom_port->dram->osr);
|
|
|
|
/* Wait 0.1 Sec for simple Init to complete */
|
|
msleep(100);
|
|
|
|
/* Stop proccessor */
|
|
stop_processor(icom_port);
|
|
|
|
free_port_memory(icom_port);
|
|
}
|
|
}
|
|
|
|
free_irq(icom_adapter->pci_dev->irq, (void *) icom_adapter);
|
|
iounmap(icom_adapter->base_addr);
|
|
pci_release_regions(icom_adapter->pci_dev);
|
|
icom_free_adapter(icom_adapter);
|
|
}
|
|
|
|
static void icom_kref_release(struct kref *kref)
|
|
{
|
|
struct icom_adapter *icom_adapter;
|
|
|
|
icom_adapter = to_icom_adapter(kref);
|
|
icom_remove_adapter(icom_adapter);
|
|
}
|
|
|
|
static int icom_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
int index;
|
|
unsigned int command_reg;
|
|
int retval;
|
|
struct icom_adapter *icom_adapter;
|
|
struct icom_port *icom_port;
|
|
|
|
retval = pci_enable_device(dev);
|
|
if (retval) {
|
|
dev_err(&dev->dev, "Device enable FAILED\n");
|
|
return retval;
|
|
}
|
|
|
|
retval = pci_request_regions(dev, "icom");
|
|
if (retval) {
|
|
dev_err(&dev->dev, "pci_request_regions FAILED\n");
|
|
pci_disable_device(dev);
|
|
return retval;
|
|
}
|
|
|
|
pci_set_master(dev);
|
|
|
|
retval = pci_read_config_dword(dev, PCI_COMMAND, &command_reg);
|
|
if (retval) {
|
|
dev_err(&dev->dev, "PCI Config read FAILED\n");
|
|
return retval;
|
|
}
|
|
|
|
pci_write_config_dword(dev, PCI_COMMAND,
|
|
command_reg | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
|
|
| PCI_COMMAND_PARITY | PCI_COMMAND_SERR);
|
|
|
|
if (ent->driver_data == ADAPTER_V1) {
|
|
pci_write_config_dword(dev, 0x44, 0x8300830A);
|
|
} else {
|
|
pci_write_config_dword(dev, 0x44, 0x42004200);
|
|
pci_write_config_dword(dev, 0x48, 0x42004200);
|
|
}
|
|
|
|
|
|
retval = icom_alloc_adapter(&icom_adapter);
|
|
if (retval) {
|
|
dev_err(&dev->dev, "icom_alloc_adapter FAILED\n");
|
|
retval = -EIO;
|
|
goto probe_exit0;
|
|
}
|
|
|
|
icom_adapter->base_addr_pci = pci_resource_start(dev, 0);
|
|
icom_adapter->pci_dev = dev;
|
|
icom_adapter->version = ent->driver_data;
|
|
icom_adapter->subsystem_id = ent->subdevice;
|
|
|
|
|
|
retval = icom_init_ports(icom_adapter);
|
|
if (retval) {
|
|
dev_err(&dev->dev, "Port configuration failed\n");
|
|
goto probe_exit1;
|
|
}
|
|
|
|
icom_adapter->base_addr = pci_ioremap_bar(dev, 0);
|
|
|
|
if (!icom_adapter->base_addr) {
|
|
retval = -ENOMEM;
|
|
goto probe_exit1;
|
|
}
|
|
|
|
/* save off irq and request irq line */
|
|
retval = request_irq(dev->irq, icom_interrupt, IRQF_SHARED, ICOM_DRIVER_NAME, (void *)icom_adapter);
|
|
if (retval) {
|
|
goto probe_exit2;
|
|
}
|
|
|
|
retval = icom_load_ports(icom_adapter);
|
|
|
|
for (index = 0; index < icom_adapter->numb_ports; index++) {
|
|
icom_port = &icom_adapter->port_info[index];
|
|
|
|
if (icom_port->status == ICOM_PORT_ACTIVE) {
|
|
icom_port->uart_port.irq = icom_port->adapter->pci_dev->irq;
|
|
icom_port->uart_port.type = PORT_ICOM;
|
|
icom_port->uart_port.iotype = UPIO_MEM;
|
|
icom_port->uart_port.membase =
|
|
(unsigned char __iomem *)icom_adapter->base_addr_pci;
|
|
icom_port->uart_port.fifosize = 16;
|
|
icom_port->uart_port.ops = &icom_ops;
|
|
icom_port->uart_port.line =
|
|
icom_port->port + icom_adapter->index * 4;
|
|
if (uart_add_one_port (&icom_uart_driver, &icom_port->uart_port)) {
|
|
icom_port->status = ICOM_PORT_OFF;
|
|
dev_err(&dev->dev, "Device add failed\n");
|
|
} else
|
|
dev_info(&dev->dev, "Device added\n");
|
|
}
|
|
}
|
|
|
|
kref_init(&icom_adapter->kref);
|
|
return 0;
|
|
|
|
probe_exit2:
|
|
iounmap(icom_adapter->base_addr);
|
|
probe_exit1:
|
|
icom_free_adapter(icom_adapter);
|
|
|
|
probe_exit0:
|
|
pci_release_regions(dev);
|
|
pci_disable_device(dev);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void icom_remove(struct pci_dev *dev)
|
|
{
|
|
struct icom_adapter *icom_adapter;
|
|
struct list_head *tmp;
|
|
|
|
list_for_each(tmp, &icom_adapter_head) {
|
|
icom_adapter = list_entry(tmp, struct icom_adapter,
|
|
icom_adapter_entry);
|
|
if (icom_adapter->pci_dev == dev) {
|
|
kref_put(&icom_adapter->kref, icom_kref_release);
|
|
return;
|
|
}
|
|
}
|
|
|
|
dev_err(&dev->dev, "Unable to find device to remove\n");
|
|
}
|
|
|
|
static struct pci_driver icom_pci_driver = {
|
|
.name = ICOM_DRIVER_NAME,
|
|
.id_table = icom_pci_table,
|
|
.probe = icom_probe,
|
|
.remove = icom_remove,
|
|
};
|
|
|
|
static int __init icom_init(void)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock_init(&icom_lock);
|
|
|
|
ret = uart_register_driver(&icom_uart_driver);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = pci_register_driver(&icom_pci_driver);
|
|
|
|
if (ret < 0)
|
|
uart_unregister_driver(&icom_uart_driver);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit icom_exit(void)
|
|
{
|
|
pci_unregister_driver(&icom_pci_driver);
|
|
uart_unregister_driver(&icom_uart_driver);
|
|
}
|
|
|
|
module_init(icom_init);
|
|
module_exit(icom_exit);
|
|
|
|
MODULE_AUTHOR("Michael Anderson <mjanders@us.ibm.com>");
|
|
MODULE_DESCRIPTION("IBM iSeries Serial IOA driver");
|
|
MODULE_SUPPORTED_DEVICE
|
|
("IBM iSeries 2745, 2771, 2772, 2742, 2793 and 2805 Communications adapters");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_FIRMWARE("icom_call_setup.bin");
|
|
MODULE_FIRMWARE("icom_res_dce.bin");
|
|
MODULE_FIRMWARE("icom_asc.bin");
|