Initial import

1 files changed, 4168 insertions, 0 deletions

diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
new file mode 100644
index 000000000..ad47aeffa
--- /dev/null
+++ b/drivers/tty/cyclades.c
@@ -0,0 +1,4168 @@
+#undef	BLOCKMOVE
+#define	Z_WAKE
+#undef	Z_EXT_CHARS_IN_BUFFER
+
+/*
+ * This file contains the driver for the Cyclades async multiport
+ * serial boards.
+ *
+ * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
+ * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
+ *
+ * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ * Converted to pci probing and cleaned up by Jiri Slaby.
+ *
+ */
+
+#define CY_VERSION	"2.6"
+
+/* If you need to install more boards than NR_CARDS, change the constant
+   in the definition below. No other change is necessary to support up to
+   eight boards. Beyond that you'll have to extend cy_isa_addresses. */
+
+#define NR_CARDS	4
+
+/*
+   If the total number of ports is larger than NR_PORTS, change this
+   constant in the definition below. No other change is necessary to
+   support more boards/ports. */
+
+#define NR_PORTS	256
+
+#define ZO_V1	0
+#define ZO_V2	1
+#define ZE_V1	2
+
+#define	SERIAL_PARANOIA_CHECK
+#undef	CY_DEBUG_OPEN
+#undef	CY_DEBUG_THROTTLE
+#undef	CY_DEBUG_OTHER
+#undef	CY_DEBUG_IO
+#undef	CY_DEBUG_COUNT
+#undef	CY_DEBUG_DTR
+#undef	CY_DEBUG_INTERRUPTS
+#undef	CY_16Y_HACK
+#undef	CY_ENABLE_MONITORING
+#undef	CY_PCI_DEBUG
+
+/*
+ * Include section
+ */
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/cyclades.h>
+#include <linux/mm.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/firmware.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+static void cy_send_xchar(struct tty_struct *tty, char ch);
+
+#ifndef SERIAL_XMIT_SIZE
+#define	SERIAL_XMIT_SIZE	(min(PAGE_SIZE, 4096))
+#endif
+
+#define STD_COM_FLAGS (0)
+
+/* firmware stuff */
+#define ZL_MAX_BLOCKS	16
+#define DRIVER_VERSION	0x02010203
+#define RAM_SIZE 0x80000
+
+enum zblock_type {
+	ZBLOCK_PRG = 0,
+	ZBLOCK_FPGA = 1
+};
+
+struct zfile_header {
+	char name[64];
+	char date[32];
+	char aux[32];
+	u32 n_config;
+	u32 config_offset;
+	u32 n_blocks;
+	u32 block_offset;
+	u32 reserved[9];
+} __attribute__ ((packed));
+
+struct zfile_config {
+	char name[64];
+	u32 mailbox;
+	u32 function;
+	u32 n_blocks;
+	u32 block_list[ZL_MAX_BLOCKS];
+} __attribute__ ((packed));
+
+struct zfile_block {
+	u32 type;
+	u32 file_offset;
+	u32 ram_offset;
+	u32 size;
+} __attribute__ ((packed));
+
+static struct tty_driver *cy_serial_driver;
+
+#ifdef CONFIG_ISA
+/* This is the address lookup table. The driver will probe for
+   Cyclom-Y/ISA boards at all addresses in here. If you want the
+   driver to probe addresses at a different address, add it to
+   this table.  If the driver is probing some other board and
+   causing problems, remove the offending address from this table.
+*/
+
+static unsigned int cy_isa_addresses[] = {
+	0xD0000,
+	0xD2000,
+	0xD4000,
+	0xD6000,
+	0xD8000,
+	0xDA000,
+	0xDC000,
+	0xDE000,
+	0, 0, 0, 0, 0, 0, 0, 0
+};
+
+#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
+
+static long maddr[NR_CARDS];
+static int irq[NR_CARDS];
+
+module_param_array(maddr, long, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+
+#endif				/* CONFIG_ISA */
+
+/* This is the per-card data structure containing address, irq, number of
+   channels, etc. This driver supports a maximum of NR_CARDS cards.
+*/
+static struct cyclades_card cy_card[NR_CARDS];
+
+static int cy_next_channel;	/* next minor available */
+
+/*
+ * This is used to look up the divisor speeds and the timeouts
+ * We're normally limited to 15 distinct baud rates.  The extra
+ * are accessed via settings in info->port.flags.
+ *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
+ *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
+ *                                               HI            VHI
+ *     20
+ */
+static const int baud_table[] = {
+	0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
+	1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
+	230400, 0
+};
+
+static const char baud_co_25[] = {	/* 25 MHz clock option table */
+	/* value =>    00    01   02    03    04 */
+	/* divide by    8    32   128   512  2048 */
+	0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
+	0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+};
+
+static const char baud_bpr_25[] = {	/* 25 MHz baud rate period table */
+	0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
+	0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
+};
+
+static const char baud_co_60[] = {	/* 60 MHz clock option table (CD1400 J) */
+	/* value =>    00    01   02    03    04 */
+	/* divide by    8    32   128   512  2048 */
+	0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
+	0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00
+};
+
+static const char baud_bpr_60[] = {	/* 60 MHz baud rate period table (CD1400 J) */
+	0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
+	0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
+	0x21
+};
+
+static const char baud_cor3[] = {	/* receive threshold */
+	0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+	0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
+	0x07
+};
+
+/*
+ * The Cyclades driver implements HW flow control as any serial driver.
+ * The cyclades_port structure member rflow and the vector rflow_thr
+ * allows us to take advantage of a special feature in the CD1400 to avoid
+ * data loss even when the system interrupt latency is too high. These flags
+ * are to be used only with very special applications. Setting these flags
+ * requires the use of a special cable (DTR and RTS reversed). In the new
+ * CD1400-based boards (rev. 6.00 or later), there is no need for special
+ * cables.
+ */
+
+static const char rflow_thr[] = {	/* rflow threshold */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+	0x0a
+};
+
+/*  The Cyclom-Ye has placed the sequential chips in non-sequential
+ *  address order.  This look-up table overcomes that problem.
+ */
+static const unsigned int cy_chip_offset[] = { 0x0000,
+	0x0400,
+	0x0800,
+	0x0C00,
+	0x0200,
+	0x0600,
+	0x0A00,
+	0x0E00
+};
+
+/* PCI related definitions */
+
+#ifdef CONFIG_PCI
+static const struct pci_device_id cy_pci_dev_id[] = {
+	/* PCI < 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
+	/* PCI > 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
+	/* 4Y PCI < 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
+	/* 4Y PCI > 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
+	/* 8Y PCI < 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
+	/* 8Y PCI > 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
+	/* Z PCI < 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
+	/* Z PCI > 1Mb */
+	{ PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
+	{ }			/* end of table */
+};
+MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
+#endif
+
+static void cy_start(struct tty_struct *);
+static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
+static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
+#ifdef CONFIG_ISA
+static unsigned detect_isa_irq(void __iomem *);
+#endif				/* CONFIG_ISA */
+
+#ifndef CONFIG_CYZ_INTR
+static void cyz_poll(unsigned long);
+
+/* The Cyclades-Z polling cycle is defined by this variable */
+static long cyz_polling_cycle = CZ_DEF_POLL;
+
+static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
+
+#else				/* CONFIG_CYZ_INTR */
+static void cyz_rx_restart(unsigned long);
+static struct timer_list cyz_rx_full_timer[NR_PORTS];
+#endif				/* CONFIG_CYZ_INTR */
+
+static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
+{
+	struct cyclades_card *card = port->card;
+
+	cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
+}
+
+static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
+{
+	struct cyclades_card *card = port->card;
+
+	return readb(port->u.cyy.base_addr + (reg << card->bus_index));
+}
+
+static inline bool cy_is_Z(struct cyclades_card *card)
+{
+	return card->num_chips == (unsigned int)-1;
+}
+
+static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
+{
+	return readl(&ctl_addr->init_ctrl) & (1 << 17);
+}
+
+static inline bool cyz_fpga_loaded(struct cyclades_card *card)
+{
+	return __cyz_fpga_loaded(card->ctl_addr.p9060);
+}
+
+static inline bool cyz_is_loaded(struct cyclades_card *card)
+{
+	struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
+
+	return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
+			readl(&fw_id->signature) == ZFIRM_ID;
+}
+
+static inline int serial_paranoia_check(struct cyclades_port *info,
+		const char *name, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+	if (!info) {
+		printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
+				"in %s\n", name, routine);
+		return 1;
+	}
+
+	if (info->magic != CYCLADES_MAGIC) {
+		printk(KERN_WARNING "cyc Warning: bad magic number for serial "
+				"struct (%s) in %s\n", name, routine);
+		return 1;
+	}
+#endif
+	return 0;
+}
+
+/***********************************************************/
+/********* Start of block of Cyclom-Y specific code ********/
+
+/* This routine waits up to 1000 micro-seconds for the previous
+   command to the Cirrus chip to complete and then issues the
+   new command.  An error is returned if the previous command
+   didn't finish within the time limit.
+
+   This function is only called from inside spinlock-protected code.
+ */
+static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
+{
+	void __iomem *ccr = base_addr + (CyCCR << index);
+	unsigned int i;
+
+	/* Check to see that the previous command has completed */
+	for (i = 0; i < 100; i++) {
+		if (readb(ccr) == 0)
+			break;
+		udelay(10L);
+	}
+	/* if the CCR never cleared, the previous command
+	   didn't finish within the "reasonable time" */
+	if (i == 100)
+		return -1;
+
+	/* Issue the new command */
+	cy_writeb(ccr, cmd);
+
+	return 0;
+}
+
+static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
+{
+	return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
+			port->card->bus_index);
+}
+
+#ifdef CONFIG_ISA
+/* ISA interrupt detection code */
+static unsigned detect_isa_irq(void __iomem *address)
+{
+	int irq;
+	unsigned long irqs, flags;
+	int save_xir, save_car;
+	int index = 0;		/* IRQ probing is only for ISA */
+
+	/* forget possible initially masked and pending IRQ */
+	irq = probe_irq_off(probe_irq_on());
+
+	/* Clear interrupts on the board first */
+	cy_writeb(address + (Cy_ClrIntr << index), 0);
+	/* Cy_ClrIntr is 0x1800 */
+
+	irqs = probe_irq_on();
+	/* Wait ... */
+	msleep(5);
+
+	/* Enable the Tx interrupts on the CD1400 */
+	local_irq_save(flags);
+	cy_writeb(address + (CyCAR << index), 0);
+	__cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
+
+	cy_writeb(address + (CyCAR << index), 0);
+	cy_writeb(address + (CySRER << index),
+		  readb(address + (CySRER << index)) | CyTxRdy);
+	local_irq_restore(flags);
+
+	/* Wait ... */
+	msleep(5);
+
+	/* Check which interrupt is in use */
+	irq = probe_irq_off(irqs);
+
+	/* Clean up */
+	save_xir = (u_char) readb(address + (CyTIR << index));
+	save_car = readb(address + (CyCAR << index));
+	cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
+	cy_writeb(address + (CySRER << index),
+		  readb(address + (CySRER << index)) & ~CyTxRdy);
+	cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
+	cy_writeb(address + (CyCAR << index), (save_car));
+	cy_writeb(address + (Cy_ClrIntr << index), 0);
+	/* Cy_ClrIntr is 0x1800 */
+
+	return (irq > 0) ? irq : 0;
+}
+#endif				/* CONFIG_ISA */
+
+static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
+		void __iomem *base_addr)
+{
+	struct cyclades_port *info;
+	struct tty_port *port;
+	int len, index = cinfo->bus_index;
+	u8 ivr, save_xir, channel, save_car, data, char_count;
+
+#ifdef CY_DEBUG_INTERRUPTS
+	printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
+#endif
+	/* determine the channel & change to that context */
+	save_xir = readb(base_addr + (CyRIR << index));
+	channel = save_xir & CyIRChannel;
+	info = &cinfo->ports[channel + chip * 4];
+	port = &info->port;
+	save_car = cyy_readb(info, CyCAR);
+	cyy_writeb(info, CyCAR, save_xir);
+	ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
+
+	/* there is an open port for this data */
+	if (ivr == CyIVRRxEx) {	/* exception */
+		data = cyy_readb(info, CyRDSR);
+
+		/* For statistics only */
+		if (data & CyBREAK)
+			info->icount.brk++;
+		else if (data & CyFRAME)
+			info->icount.frame++;
+		else if (data & CyPARITY)
+			info->icount.parity++;
+		else if (data & CyOVERRUN)
+			info->icount.overrun++;
+
+		if (data & info->ignore_status_mask) {
+			info->icount.rx++;
+			return;
+		}
+		if (tty_buffer_request_room(port, 1)) {
+			if (data & info->read_status_mask) {
+				if (data & CyBREAK) {
+					tty_insert_flip_char(port,
+						cyy_readb(info, CyRDSR),
+						TTY_BREAK);
+					info->icount.rx++;
+					if (port->flags & ASYNC_SAK) {
+						struct tty_struct *tty =
+							tty_port_tty_get(port);
+						if (tty) {
+							do_SAK(tty);
+							tty_kref_put(tty);
+						}
+					}
+				} else if (data & CyFRAME) {
+					tty_insert_flip_char(port,
+						cyy_readb(info, CyRDSR),
+						TTY_FRAME);
+					info->icount.rx++;
+					info->idle_stats.frame_errs++;
+				} else if (data & CyPARITY) {
+					/* Pieces of seven... */
+					tty_insert_flip_char(port,
+						cyy_readb(info, CyRDSR),
+						TTY_PARITY);
+					info->icount.rx++;
+					info->idle_stats.parity_errs++;
+				} else if (data & CyOVERRUN) {
+					tty_insert_flip_char(port, 0,
+							TTY_OVERRUN);
+					info->icount.rx++;
+					/* If the flip buffer itself is
+					   overflowing, we still lose
+					   the next incoming character.
+					 */
+					tty_insert_flip_char(port,
+						cyy_readb(info, CyRDSR),
+						TTY_FRAME);
+					info->icount.rx++;
+					info->idle_stats.overruns++;
+				/* These two conditions may imply */
+				/* a normal read should be done. */
+				/* } else if(data & CyTIMEOUT) { */
+				/* } else if(data & CySPECHAR) { */
+				} else {
+					tty_insert_flip_char(port, 0,
+							TTY_NORMAL);
+					info->icount.rx++;
+				}
+			} else {
+				tty_insert_flip_char(port, 0, TTY_NORMAL);
+				info->icount.rx++;
+			}
+		} else {
+			/* there was a software buffer overrun and nothing
+			 * could be done about it!!! */
+			info->icount.buf_overrun++;
+			info->idle_stats.overruns++;
+		}
+	} else {	/* normal character reception */
+		/* load # chars available from the chip */
+		char_count = cyy_readb(info, CyRDCR);
+
+#ifdef CY_ENABLE_MONITORING
+		++info->mon.int_count;
+		info->mon.char_count += char_count;
+		if (char_count > info->mon.char_max)
+			info->mon.char_max = char_count;
+		info->mon.char_last = char_count;
+#endif
+		len = tty_buffer_request_room(port, char_count);
+		while (len--) {
+			data = cyy_readb(info, CyRDSR);
+			tty_insert_flip_char(port, data, TTY_NORMAL);
+			info->idle_stats.recv_bytes++;
+			info->icount.rx++;
+#ifdef CY_16Y_HACK
+			udelay(10L);
+#endif
+		}
+		info->idle_stats.recv_idle = jiffies;
+	}
+	tty_schedule_flip(port);
+
+	/* end of service */
+	cyy_writeb(info, CyRIR, save_xir & 0x3f);
+	cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
+		void __iomem *base_addr)
+{
+	struct cyclades_port *info;
+	struct tty_struct *tty;
+	int char_count, index = cinfo->bus_index;
+	u8 save_xir, channel, save_car, outch;
+
+	/* Since we only get here when the transmit buffer
+	   is empty, we know we can always stuff a dozen
+	   characters. */
+#ifdef CY_DEBUG_INTERRUPTS
+	printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
+#endif
+
+	/* determine the channel & change to that context */
+	save_xir = readb(base_addr + (CyTIR << index));
+	channel = save_xir & CyIRChannel;
+	save_car = readb(base_addr + (CyCAR << index));
+	cy_writeb(base_addr + (CyCAR << index), save_xir);
+
+	info = &cinfo->ports[channel + chip * 4];
+	tty = tty_port_tty_get(&info->port);
+	if (tty == NULL) {
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+		goto end;
+	}
+
+	/* load the on-chip space for outbound data */
+	char_count = info->xmit_fifo_size;
+
+	if (info->x_char) {	/* send special char */
+		outch = info->x_char;
+		cyy_writeb(info, CyTDR, outch);
+		char_count--;
+		info->icount.tx++;
+		info->x_char = 0;
+	}
+
+	if (info->breakon || info->breakoff) {
+		if (info->breakon) {
+			cyy_writeb(info, CyTDR, 0);
+			cyy_writeb(info, CyTDR, 0x81);
+			info->breakon = 0;
+			char_count -= 2;
+		}
+		if (info->breakoff) {
+			cyy_writeb(info, CyTDR, 0);
+			cyy_writeb(info, CyTDR, 0x83);
+			info->breakoff = 0;
+			char_count -= 2;
+		}
+	}
+
+	while (char_count-- > 0) {
+		if (!info->xmit_cnt) {
+			if (cyy_readb(info, CySRER) & CyTxMpty) {
+				cyy_writeb(info, CySRER,
+					cyy_readb(info, CySRER) & ~CyTxMpty);
+			} else {
+				cyy_writeb(info, CySRER, CyTxMpty |
+					(cyy_readb(info, CySRER) & ~CyTxRdy));
+			}
+			goto done;
+		}
+		if (info->port.xmit_buf == NULL) {
+			cyy_writeb(info, CySRER,
+				cyy_readb(info, CySRER) & ~CyTxRdy);
+			goto done;
+		}
+		if (tty->stopped || tty->hw_stopped) {
+			cyy_writeb(info, CySRER,
+				cyy_readb(info, CySRER) & ~CyTxRdy);
+			goto done;
+		}
+		/* Because the Embedded Transmit Commands have been enabled,
+		 * we must check to see if the escape character, NULL, is being
+		 * sent. If it is, we must ensure that there is room for it to
+		 * be doubled in the output stream.  Therefore we no longer
+		 * advance the pointer when the character is fetched, but
+		 * rather wait until after the check for a NULL output
+		 * character. This is necessary because there may not be room
+		 * for the two chars needed to send a NULL.)
+		 */
+		outch = info->port.xmit_buf[info->xmit_tail];
+		if (outch) {
+			info->xmit_cnt--;
+			info->xmit_tail = (info->xmit_tail + 1) &
+					(SERIAL_XMIT_SIZE - 1);
+			cyy_writeb(info, CyTDR, outch);
+			info->icount.tx++;
+		} else {
+			if (char_count > 1) {
+				info->xmit_cnt--;
+				info->xmit_tail = (info->xmit_tail + 1) &
+					(SERIAL_XMIT_SIZE - 1);
+				cyy_writeb(info, CyTDR, outch);
+				cyy_writeb(info, CyTDR, 0);
+				info->icount.tx++;
+				char_count--;
+			}
+		}
+	}
+
+done:
+	tty_wakeup(tty);
+	tty_kref_put(tty);
+end:
+	/* end of service */
+	cyy_writeb(info, CyTIR, save_xir & 0x3f);
+	cyy_writeb(info, CyCAR, save_car);
+}
+
+static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
+		void __iomem *base_addr)
+{
+	struct cyclades_port *info;
+	struct tty_struct *tty;
+	int index = cinfo->bus_index;
+	u8 save_xir, channel, save_car, mdm_change, mdm_status;
+
+	/* determine the channel & change to that context */
+	save_xir = readb(base_addr + (CyMIR << index));
+	channel = save_xir & CyIRChannel;
+	info = &cinfo->ports[channel + chip * 4];
+	save_car = cyy_readb(info, CyCAR);
+	cyy_writeb(info, CyCAR, save_xir);
+
+	mdm_change = cyy_readb(info, CyMISR);
+	mdm_status = cyy_readb(info, CyMSVR1);
+
+	tty = tty_port_tty_get(&info->port);
+	if (!tty)
+		goto end;
+
+	if (mdm_change & CyANY_DELTA) {
+		/* For statistics only */
+		if (mdm_change & CyDCD)
+			info->icount.dcd++;
+		if (mdm_change & CyCTS)
+			info->icount.cts++;
+		if (mdm_change & CyDSR)
+			info->icount.dsr++;
+		if (mdm_change & CyRI)
+			info->icount.rng++;
+
+		wake_up_interruptible(&info->port.delta_msr_wait);
+	}
+
+	if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
+		if (mdm_status & CyDCD)
+			wake_up_interruptible(&info->port.open_wait);
+		else
+			tty_hangup(tty);
+	}
+	if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
+		if (tty->hw_stopped) {
+			if (mdm_status & CyCTS) {
+				/* cy_start isn't used
+				   because... !!! */
+				tty->hw_stopped = 0;
+				cyy_writeb(info, CySRER,
+					cyy_readb(info, CySRER) | CyTxRdy);
+				tty_wakeup(tty);
+			}
+		} else {
+			if (!(mdm_status & CyCTS)) {
+				/* cy_stop isn't used
+				   because ... !!! */
+				tty->hw_stopped = 1;
+				cyy_writeb(info, CySRER,
+					cyy_readb(info, CySRER) & ~CyTxRdy);
+			}
+		}
+	}
+/*	if (mdm_change & CyDSR) {
+	}
+	if (mdm_change & CyRI) {
+	}*/
+	tty_kref_put(tty);
+end:
+	/* end of service */
+	cyy_writeb(info, CyMIR, save_xir & 0x3f);
+	cyy_writeb(info, CyCAR, save_car);
+}
+
+/* The real interrupt service routine is called
+   whenever the card wants its hand held--chars
+   received, out buffer empty, modem change, etc.
+ */
+static irqreturn_t cyy_interrupt(int irq, void *dev_id)
+{
+	int status;
+	struct cyclades_card *cinfo = dev_id;
+	void __iomem *base_addr, *card_base_addr;
+	unsigned int chip, too_many, had_work;
+	int index;
+
+	if (unlikely(cinfo == NULL)) {
+#ifdef CY_DEBUG_INTERRUPTS
+		printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
+				irq);
+#endif
+		return IRQ_NONE;	/* spurious interrupt */
+	}
+
+	card_base_addr = cinfo->base_addr;
+	index = cinfo->bus_index;
+
+	/* card was not initialized yet (e.g. DEBUG_SHIRQ) */
+	if (unlikely(card_base_addr == NULL))
+		return IRQ_HANDLED;
+
+	/* This loop checks all chips in the card.  Make a note whenever
+	   _any_ chip had some work to do, as this is considered an
+	   indication that there will be more to do.  Only when no chip
+	   has any work does this outermost loop exit.
+	 */
+	do {
+		had_work = 0;
+		for (chip = 0; chip < cinfo->num_chips; chip++) {
+			base_addr = cinfo->base_addr +
+					(cy_chip_offset[chip] << index);
+			too_many = 0;
+			while ((status = readb(base_addr +
+						(CySVRR << index))) != 0x00) {
+				had_work++;
+			/* The purpose of the following test is to ensure that
+			   no chip can monopolize the driver.  This forces the
+			   chips to be checked in a round-robin fashion (after
+			   draining each of a bunch (1000) of characters).
+			 */
+				if (1000 < too_many++)
+					break;
+				spin_lock(&cinfo->card_lock);
+				if (status & CySRReceive) /* rx intr */
+					cyy_chip_rx(cinfo, chip, base_addr);
+				if (status & CySRTransmit) /* tx intr */
+					cyy_chip_tx(cinfo, chip, base_addr);
+				if (status & CySRModem) /* modem intr */
+					cyy_chip_modem(cinfo, chip, base_addr);
+				spin_unlock(&cinfo->card_lock);
+			}
+		}
+	} while (had_work);
+
+	/* clear interrupts */
+	spin_lock(&cinfo->card_lock);
+	cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
+	/* Cy_ClrIntr is 0x1800 */
+	spin_unlock(&cinfo->card_lock);
+	return IRQ_HANDLED;
+}				/* cyy_interrupt */
+
+static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
+		unsigned int clear)
+{
+	struct cyclades_card *card = info->card;
+	int channel = info->line - card->first_line;
+	u32 rts, dtr, msvrr, msvrd;
+
+	channel &= 0x03;
+
+	if (info->rtsdtr_inv) {
+		msvrr = CyMSVR2;
+		msvrd = CyMSVR1;
+		rts = CyDTR;
+		dtr = CyRTS;
+	} else {
+		msvrr = CyMSVR1;
+		msvrd = CyMSVR2;
+		rts = CyRTS;
+		dtr = CyDTR;
+	}
+	if (set & TIOCM_RTS) {
+		cyy_writeb(info, CyCAR, channel);
+		cyy_writeb(info, msvrr, rts);
+	}
+	if (clear & TIOCM_RTS) {
+		cyy_writeb(info, CyCAR, channel);
+		cyy_writeb(info, msvrr, ~rts);
+	}
+	if (set & TIOCM_DTR) {
+		cyy_writeb(info, CyCAR, channel);
+		cyy_writeb(info, msvrd, dtr);
+#ifdef CY_DEBUG_DTR
+		printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
+		printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
+			cyy_readb(info, CyMSVR1),
+			cyy_readb(info, CyMSVR2));
+#endif
+	}
+	if (clear & TIOCM_DTR) {
+		cyy_writeb(info, CyCAR, channel);
+		cyy_writeb(info, msvrd, ~dtr);
+#ifdef CY_DEBUG_DTR
+		printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
+		printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
+			cyy_readb(info, CyMSVR1),
+			cyy_readb(info, CyMSVR2));
+#endif
+	}
+}
+
+/***********************************************************/
+/********* End of block of Cyclom-Y specific code **********/
+/******** Start of block of Cyclades-Z specific code *******/
+/***********************************************************/
+
+static int
+cyz_fetch_msg(struct cyclades_card *cinfo,
+		__u32 *channel, __u8 *cmd, __u32 *param)
+{
+	struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+	unsigned long loc_doorbell;
+
+	loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
+	if (loc_doorbell) {
+		*cmd = (char)(0xff & loc_doorbell);
+		*channel = readl(&board_ctrl->fwcmd_channel);
+		*param = (__u32) readl(&board_ctrl->fwcmd_param);
+		cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
+		return 1;
+	}
+	return 0;
+}				/* cyz_fetch_msg */
+
+static int
+cyz_issue_cmd(struct cyclades_card *cinfo,
+		__u32 channel, __u8 cmd, __u32 param)
+{
+	struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+	__u32 __iomem *pci_doorbell;
+	unsigned int index;
+
+	if (!cyz_is_loaded(cinfo))
+		return -1;
+
+	index = 0;
+	pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
+	while ((readl(pci_doorbell) & 0xff) != 0) {
+		if (index++ == 1000)
+			return (int)(readl(pci_doorbell) & 0xff);
+		udelay(50L);
+	}
+	cy_writel(&board_ctrl->hcmd_channel, channel);
+	cy_writel(&board_ctrl->hcmd_param, param);
+	cy_writel(pci_doorbell, (long)cmd);
+
+	return 0;
+}				/* cyz_issue_cmd */
+
+static void cyz_handle_rx(struct cyclades_port *info)
+{
+	struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+	struct cyclades_card *cinfo = info->card;
+	struct tty_port *port = &info->port;
+	unsigned int char_count;
+	int len;
+#ifdef BLOCKMOVE
+	unsigned char *buf;
+#else
+	char data;
+#endif
+	__u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
+
+	rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
+	rx_put = readl(&buf_ctrl->rx_put);
+	rx_bufsize = readl(&buf_ctrl->rx_bufsize);
+	rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
+	if (rx_put >= rx_get)
+		char_count = rx_put - rx_get;
+	else
+		char_count = rx_put - rx_get + rx_bufsize;
+
+	if (!char_count)
+		return;
+
+#ifdef CY_ENABLE_MONITORING
+	info->mon.int_count++;
+	info->mon.char_count += char_count;
+	if (char_count > info->mon.char_max)
+		info->mon.char_max = char_count;
+	info->mon.char_last = char_count;
+#endif
+
+#ifdef BLOCKMOVE
+	/* we'd like to use memcpy(t, f, n) and memset(s, c, count)
+	   for performance, but because of buffer boundaries, there
+	   may be several steps to the operation */
+	while (1) {
+		len = tty_prepare_flip_string(port, &buf,
+				char_count);
+		if (!len)
+			break;
+
+		len = min_t(unsigned int, min(len, char_count),
+				rx_bufsize - new_rx_get);
+
+		memcpy_fromio(buf, cinfo->base_addr +
+				rx_bufaddr + new_rx_get, len);
+
+		new_rx_get = (new_rx_get + len) &
+				(rx_bufsize - 1);
+		char_count -= len;
+		info->icount.rx += len;
+		info->idle_stats.recv_bytes += len;
+	}
+#else
+	len = tty_buffer_request_room(port, char_count);
+	while (len--) {
+		data = readb(cinfo->base_addr + rx_bufaddr +
+				new_rx_get);
+		new_rx_get = (new_rx_get + 1) &
+					(rx_bufsize - 1);
+		tty_insert_flip_char(port, data, TTY_NORMAL);
+		info->idle_stats.recv_bytes++;
+		info->icount.rx++;
+	}
+#endif
+#ifdef CONFIG_CYZ_INTR
+	/* Recalculate the number of chars in the RX buffer and issue
+	   a cmd in case it's higher than the RX high water mark */
+	rx_put = readl(&buf_ctrl->rx_put);
+	if (rx_put >= rx_get)
+		char_count = rx_put - rx_get;
+	else
+		char_count = rx_put - rx_get + rx_bufsize;
+	if (char_count >= readl(&buf_ctrl->rx_threshold) &&
+			!timer_pending(&cyz_rx_full_timer[
+					info->line]))
+		mod_timer(&cyz_rx_full_timer[info->line],
+				jiffies + 1);
+#endif
+	info->idle_stats.recv_idle = jiffies;
+	tty_schedule_flip(&info->port);
+
+	/* Update rx_get */
+	cy_writel(&buf_ctrl->rx_get, new_rx_get);
+}
+
+static void cyz_handle_tx(struct cyclades_port *info)
+{
+	struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+	struct cyclades_card *cinfo = info->card;
+	struct tty_struct *tty;
+	u8 data;
+	unsigned int char_count;
+#ifdef BLOCKMOVE
+	int small_count;
+#endif
+	__u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
+
+	if (info->xmit_cnt <= 0)	/* Nothing to transmit */
+		return;
+
+	tx_get = readl(&buf_ctrl->tx_get);
+	tx_put = readl(&buf_ctrl->tx_put);
+	tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+	tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
+	if (tx_put >= tx_get)
+		char_count = tx_get - tx_put - 1 + tx_bufsize;
+	else
+		char_count = tx_get - tx_put - 1;
+
+	if (!char_count)
+		return;
+		
+	tty = tty_port_tty_get(&info->port);
+	if (tty == NULL)
+		goto ztxdone;
+
+	if (info->x_char) {	/* send special char */
+		data = info->x_char;
+
+		cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+		tx_put = (tx_put + 1) & (tx_bufsize - 1);
+		info->x_char = 0;
+		char_count--;
+		info->icount.tx++;
+	}
+#ifdef BLOCKMOVE
+	while (0 < (small_count = min_t(unsigned int,
+			tx_bufsize - tx_put, min_t(unsigned int,
+				(SERIAL_XMIT_SIZE - info->xmit_tail),
+				min_t(unsigned int, info->xmit_cnt,
+					char_count))))) {
+
+		memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
+				&info->port.xmit_buf[info->xmit_tail],
+				small_count);
+
+		tx_put = (tx_put + small_count) & (tx_bufsize - 1);
+		char_count -= small_count;
+		info->icount.tx += small_count;
+		info->xmit_cnt -= small_count;
+		info->xmit_tail = (info->xmit_tail + small_count) &
+				(SERIAL_XMIT_SIZE - 1);
+	}
+#else
+	while (info->xmit_cnt && char_count) {
+		data = info->port.xmit_buf[info->xmit_tail];
+		info->xmit_cnt--;
+		info->xmit_tail = (info->xmit_tail + 1) &
+				(SERIAL_XMIT_SIZE - 1);
+
+		cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
+		tx_put = (tx_put + 1) & (tx_bufsize - 1);
+		char_count--;
+		info->icount.tx++;
+	}
+#endif
+	tty_wakeup(tty);
+	tty_kref_put(tty);
+ztxdone:
+	/* Update tx_put */
+	cy_writel(&buf_ctrl->tx_put, tx_put);
+}
+
+static void cyz_handle_cmd(struct cyclades_card *cinfo)
+{
+	struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
+	struct cyclades_port *info;
+	__u32 channel, param, fw_ver;
+	__u8 cmd;
+	int special_count;
+	int delta_count;
+
+	fw_ver = readl(&board_ctrl->fw_version);
+
+	while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
+		special_count = 0;
+		delta_count = 0;
+		info = &cinfo->ports[channel];
+
+		switch (cmd) {
+		case C_CM_PR_ERROR:
+			tty_insert_flip_char(&info->port, 0, TTY_PARITY);
+			info->icount.rx++;
+			special_count++;
+			break;
+		case C_CM_FR_ERROR:
+			tty_insert_flip_char(&info->port, 0, TTY_FRAME);
+			info->icount.rx++;
+			special_count++;
+			break;
+		case C_CM_RXBRK:
+			tty_insert_flip_char(&info->port, 0, TTY_BREAK);
+			info->icount.rx++;
+			special_count++;
+			break;
+		case C_CM_MDCD:
+			info->icount.dcd++;
+			delta_count++;
+			if (info->port.flags & ASYNC_CHECK_CD) {
+				u32 dcd = fw_ver > 241 ? param :
+					readl(&info->u.cyz.ch_ctrl->rs_status);
+				if (dcd & C_RS_DCD)
+					wake_up_interruptible(&info->port.open_wait);
+				else
+					tty_port_tty_hangup(&info->port, false);
+			}
+			break;
+		case C_CM_MCTS:
+			info->icount.cts++;
+			delta_count++;
+			break;
+		case C_CM_MRI:
+			info->icount.rng++;
+			delta_count++;
+			break;
+		case C_CM_MDSR:
+			info->icount.dsr++;
+			delta_count++;
+			break;
+#ifdef Z_WAKE
+		case C_CM_IOCTLW:
+			complete(&info->shutdown_wait);
+			break;
+#endif
+#ifdef CONFIG_CYZ_INTR
+		case C_CM_RXHIWM:
+		case C_CM_RXNNDT:
+		case C_CM_INTBACK2:
+			/* Reception Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+			printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
+					"port %ld\n", info->card, channel);
+#endif
+			cyz_handle_rx(info);
+			break;
+		case C_CM_TXBEMPTY:
+		case C_CM_TXLOWWM:
+		case C_CM_INTBACK:
+			/* Transmission Interrupt */
+#ifdef CY_DEBUG_INTERRUPTS
+			printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
+					"port %ld\n", info->card, channel);
+#endif
+			cyz_handle_tx(info);
+			break;
+#endif				/* CONFIG_CYZ_INTR */
+		case C_CM_FATAL:
+			/* should do something with this !!! */
+			break;
+		default:
+			break;
+		}
+		if (delta_count)
+			wake_up_interruptible(&info->port.delta_msr_wait);
+		if (special_count)
+			tty_schedule_flip(&info->port);
+	}
+}
+
+#ifdef CONFIG_CYZ_INTR
+static irqreturn_t cyz_interrupt(int irq, void *dev_id)
+{
+	struct cyclades_card *cinfo = dev_id;
+
+	if (unlikely(!cyz_is_loaded(cinfo))) {
+#ifdef CY_DEBUG_INTERRUPTS
+		printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
+				"(IRQ%d).\n", irq);
+#endif
+		return IRQ_NONE;
+	}
+
+	/* Handle the interrupts */
+	cyz_handle_cmd(cinfo);
+
+	return IRQ_HANDLED;
+}				/* cyz_interrupt */
+
+static void cyz_rx_restart(unsigned long arg)
+{
+	struct cyclades_port *info = (struct cyclades_port *)arg;
+	struct cyclades_card *card = info->card;
+	int retval;
+	__u32 channel = info->line - card->first_line;
+	unsigned long flags;
+
+	spin_lock_irqsave(&card->card_lock, flags);
+	retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
+	if (retval != 0) {
+		printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
+			info->line, retval);
+	}
+	spin_unlock_irqrestore(&card->card_lock, flags);
+}
+
+#else				/* CONFIG_CYZ_INTR */
+
+static void cyz_poll(unsigned long arg)
+{
+	struct cyclades_card *cinfo;
+	struct cyclades_port *info;
+	unsigned long expires = jiffies + HZ;
+	unsigned int port, card;
+
+	for (card = 0; card < NR_CARDS; card++) {
+		cinfo = &cy_card[card];
+
+		if (!cy_is_Z(cinfo))
+			continue;
+		if (!cyz_is_loaded(cinfo))
+			continue;
+
+	/* Skip first polling cycle to avoid racing conditions with the FW */
+		if (!cinfo->intr_enabled) {
+			cinfo->intr_enabled = 1;
+			continue;
+		}
+
+		cyz_handle_cmd(cinfo);
+
+		for (port = 0; port < cinfo->nports; port++) {
+			info = &cinfo->ports[port];
+
+			if (!info->throttle)
+				cyz_handle_rx(info);
+			cyz_handle_tx(info);
+		}
+		/* poll every 'cyz_polling_cycle' period */
+		expires = jiffies + cyz_polling_cycle;
+	}
+	mod_timer(&cyz_timerlist, expires);
+}				/* cyz_poll */
+
+#endif				/* CONFIG_CYZ_INTR */
+
+/********** End of block of Cyclades-Z specific code *********/
+/***********************************************************/
+
+/* This is called whenever a port becomes active;
+   interrupts are enabled and DTR & RTS are turned on.
+ */
+static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
+{
+	struct cyclades_card *card;
+	unsigned long flags;
+	int retval = 0;
+	int channel;
+	unsigned long page;
+
+	card = info->card;
+	channel = info->line - card->first_line;
+
+	page = get_zeroed_page(GFP_KERNEL);
+	if (!page)
+		return -ENOMEM;
+
+	spin_lock_irqsave(&card->card_lock, flags);
+
+	if (info->port.flags & ASYNC_INITIALIZED)
+		goto errout;
+
+	if (!info->type) {
+		set_bit(TTY_IO_ERROR, &tty->flags);
+		goto errout;
+	}
+
+	if (info->port.xmit_buf)
+		free_page(page);
+	else
+		info->port.xmit_buf = (unsigned char *)page;
+
+	spin_unlock_irqrestore(&card->card_lock, flags);
+
+	cy_set_line_char(info, tty);
+
+	if (!cy_is_Z(card)) {
+		channel &= 0x03;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+
+		cyy_writeb(info, CyCAR, channel);
+
+		cyy_writeb(info, CyRTPR,
+			(info->default_timeout ? info->default_timeout : 0x02));
+		/* 10ms rx timeout */
+
+		cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
+
+		cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
+
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
+	} else {
+		struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+
+		if (!cyz_is_loaded(card))
+			return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+		printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
+			"base_addr %p\n", card, channel, card->base_addr);
+#endif
+		spin_lock_irqsave(&card->card_lock, flags);
+
+		cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
+#ifdef Z_WAKE
+#ifdef CONFIG_CYZ_INTR
+		cy_writel(&ch_ctrl->intr_enable,
+			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+			  C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
+#else
+		cy_writel(&ch_ctrl->intr_enable,
+			  C_IN_IOCTLW | C_IN_MDCD);
+#endif				/* CONFIG_CYZ_INTR */
+#else
+#ifdef CONFIG_CYZ_INTR
+		cy_writel(&ch_ctrl->intr_enable,
+			  C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
+			  C_IN_RXNNDT | C_IN_MDCD);
+#else
+		cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
+#endif				/* CONFIG_CYZ_INTR */
+#endif				/* Z_WAKE */
+
+		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
+				"%x\n", info->line, retval);
+		}
+
+		/* Flush RX buffers before raising DTR and RTS */
+		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
+				"%x\n", info->line, retval);
+		}
+
+		/* set timeout !!! */
+		/* set RTS and DTR !!! */
+		tty_port_raise_dtr_rts(&info->port);
+
+		/* enable send, recv, modem !!! */
+	}
+
+	info->port.flags |= ASYNC_INITIALIZED;
+
+	clear_bit(TTY_IO_ERROR, &tty->flags);
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+	info->breakon = info->breakoff = 0;
+	memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
+	info->idle_stats.in_use =
+	info->idle_stats.recv_idle =
+	info->idle_stats.xmit_idle = jiffies;
+
+	spin_unlock_irqrestore(&card->card_lock, flags);
+
+#ifdef CY_DEBUG_OPEN
+	printk(KERN_DEBUG "cyc startup done\n");
+#endif
+	return 0;
+
+errout:
+	spin_unlock_irqrestore(&card->card_lock, flags);
+	free_page(page);
+	return retval;
+}				/* startup */
+
+static void start_xmit(struct cyclades_port *info)
+{
+	struct cyclades_card *card = info->card;
+	unsigned long flags;
+	int channel = info->line - card->first_line;
+
+	if (!cy_is_Z(card)) {
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_writeb(info, CyCAR, channel & 0x03);
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	} else {
+#ifdef CONFIG_CYZ_INTR
+		int retval;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+		retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
+				"%x\n", info->line, retval);
+		}
+		spin_unlock_irqrestore(&card->card_lock, flags);
+#else				/* CONFIG_CYZ_INTR */
+		/* Don't have to do anything at this time */
+#endif				/* CONFIG_CYZ_INTR */
+	}
+}				/* start_xmit */
+
+/*
+ * This routine shuts down a serial port; interrupts are disabled,
+ * and DTR is dropped if the hangup on close termio flag is on.
+ */
+static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
+{
+	struct cyclades_card *card;
+	unsigned long flags;
+
+	if (!(info->port.flags & ASYNC_INITIALIZED))
+		return;
+
+	card = info->card;
+	if (!cy_is_Z(card)) {
+		spin_lock_irqsave(&card->card_lock, flags);
+
+		/* Clear delta_msr_wait queue to avoid mem leaks. */
+		wake_up_interruptible(&info->port.delta_msr_wait);
+
+		if (info->port.xmit_buf) {
+			unsigned char *temp;
+			temp = info->port.xmit_buf;
+			info->port.xmit_buf = NULL;
+			free_page((unsigned long)temp);
+		}
+		if (tty->termios.c_cflag & HUPCL)
+			cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
+
+		cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
+		/* it may be appropriate to clear _XMIT at
+		   some later date (after testing)!!! */
+
+		set_bit(TTY_IO_ERROR, &tty->flags);
+		info->port.flags &= ~ASYNC_INITIALIZED;
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	} else {
+#ifdef CY_DEBUG_OPEN
+		int channel = info->line - card->first_line;
+		printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
+			"base_addr %p\n", card, channel, card->base_addr);
+#endif
+
+		if (!cyz_is_loaded(card))
+			return;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+
+		if (info->port.xmit_buf) {
+			unsigned char *temp;
+			temp = info->port.xmit_buf;
+			info->port.xmit_buf = NULL;
+			free_page((unsigned long)temp);
+		}
+
+		if (tty->termios.c_cflag & HUPCL)
+			tty_port_lower_dtr_rts(&info->port);
+
+		set_bit(TTY_IO_ERROR, &tty->flags);
+		info->port.flags &= ~ASYNC_INITIALIZED;
+
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	}
+
+#ifdef CY_DEBUG_OPEN
+	printk(KERN_DEBUG "cyc shutdown done\n");
+#endif
+}				/* shutdown */
+
+/*
+ * ------------------------------------------------------------
+ * cy_open() and friends
+ * ------------------------------------------------------------
+ */
+
+/*
+ * This routine is called whenever a serial port is opened.  It
+ * performs the serial-specific initialization for the tty structure.
+ */
+static int cy_open(struct tty_struct *tty, struct file *filp)
+{
+	struct cyclades_port *info;
+	unsigned int i, line = tty->index;
+	int retval;
+
+	for (i = 0; i < NR_CARDS; i++)
+		if (line < cy_card[i].first_line + cy_card[i].nports &&
+				line >= cy_card[i].first_line)
+			break;
+	if (i >= NR_CARDS)
+		return -ENODEV;
+	info = &cy_card[i].ports[line - cy_card[i].first_line];
+	if (info->line < 0)
+		return -ENODEV;
+
+	/* If the card's firmware hasn't been loaded,
+	   treat it as absent from the system.  This
+	   will make the user pay attention.
+	 */
+	if (cy_is_Z(info->card)) {
+		struct cyclades_card *cinfo = info->card;
+		struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
+
+		if (!cyz_is_loaded(cinfo)) {
+			if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
+					readl(&firm_id->signature) ==
+					ZFIRM_HLT) {
+				printk(KERN_ERR "cyc:Cyclades-Z Error: you "
+					"need an external power supply for "
+					"this number of ports.\nFirmware "
+					"halted.\n");
+			} else {
+				printk(KERN_ERR "cyc:Cyclades-Z firmware not "
+					"yet loaded\n");
+			}
+			return -ENODEV;
+		}
+#ifdef CONFIG_CYZ_INTR
+		else {
+		/* In case this Z board is operating in interrupt mode, its
+		   interrupts should be enabled as soon as the first open
+		   happens to one of its ports. */
+			if (!cinfo->intr_enabled) {
+				u16 intr;
+
+				/* Enable interrupts on the PLX chip */
+				intr = readw(&cinfo->ctl_addr.p9060->
+						intr_ctrl_stat) | 0x0900;
+				cy_writew(&cinfo->ctl_addr.p9060->
+						intr_ctrl_stat, intr);
+				/* Enable interrupts on the FW */
+				retval = cyz_issue_cmd(cinfo, 0,
+						C_CM_IRQ_ENBL, 0L);
+				if (retval != 0) {
+					printk(KERN_ERR "cyc:IRQ enable retval "
+						"was %x\n", retval);
+				}
+				cinfo->intr_enabled = 1;
+			}
+		}
+#endif				/* CONFIG_CYZ_INTR */
+		/* Make sure this Z port really exists in hardware */
+		if (info->line > (cinfo->first_line + cinfo->nports - 1))
+			return -ENODEV;
+	}
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
+#endif
+	tty->driver_data = info;
+	if (serial_paranoia_check(info, tty->name, "cy_open"))
+		return -ENODEV;
+
+#ifdef CY_DEBUG_OPEN
+	printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
+			info->port.count);
+#endif
+	info->port.count++;
+#ifdef CY_DEBUG_COUNT
+	printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
+		current->pid, info->port.count);
+#endif
+
+	/*
+	 * If the port is the middle of closing, bail out now
+	 */
+	if (info->port.flags & ASYNC_CLOSING) {
+		wait_event_interruptible_tty(tty, info->port.close_wait,
+				!(info->port.flags & ASYNC_CLOSING));
+		return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
+	}
+
+	/*
+	 * Start up serial port
+	 */
+	retval = cy_startup(info, tty);
+	if (retval)
+		return retval;
+
+	retval = tty_port_block_til_ready(&info->port, tty, filp);
+	if (retval) {
+#ifdef CY_DEBUG_OPEN
+		printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
+			"with %d\n", retval);
+#endif
+		return retval;
+	}
+
+	info->throttle = 0;
+	tty_port_tty_set(&info->port, tty);
+
+#ifdef CY_DEBUG_OPEN
+	printk(KERN_DEBUG "cyc:cy_open done\n");
+#endif
+	return 0;
+}				/* cy_open */
+
+/*
+ * cy_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+	struct cyclades_card *card;
+	struct cyclades_port *info = tty->driver_data;
+	unsigned long orig_jiffies;
+	int char_time;
+
+	if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
+		return;
+
+	if (info->xmit_fifo_size == 0)
+		return;		/* Just in case.... */
+
+	orig_jiffies = jiffies;
+	/*
+	 * Set the check interval to be 1/5 of the estimated time to
+	 * send a single character, and make it at least 1.  The check
+	 * interval should also be less than the timeout.
+	 *
+	 * Note: we have to use pretty tight timings here to satisfy
+	 * the NIST-PCTS.
+	 */
+	char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+	char_time = char_time / 5;
+	if (char_time <= 0)
+		char_time = 1;
+	if (timeout < 0)
+		timeout = 0;
+	if (timeout)
+		char_time = min(char_time, timeout);
+	/*
+	 * If the transmitter hasn't cleared in twice the approximate
+	 * amount of time to send the entire FIFO, it probably won't
+	 * ever clear.  This assumes the UART isn't doing flow
+	 * control, which is currently the case.  Hence, if it ever
+	 * takes longer than info->timeout, this is probably due to a
+	 * UART bug of some kind.  So, we clamp the timeout parameter at
+	 * 2*info->timeout.
+	 */
+	if (!timeout || timeout > 2 * info->timeout)
+		timeout = 2 * info->timeout;
+
+	card = info->card;
+	if (!cy_is_Z(card)) {
+		while (cyy_readb(info, CySRER) & CyTxRdy) {
+			if (msleep_interruptible(jiffies_to_msecs(char_time)))
+				break;
+			if (timeout && time_after(jiffies, orig_jiffies +
+					timeout))
+				break;
+		}
+	}
+	/* Run one more char cycle */
+	msleep_interruptible(jiffies_to_msecs(char_time * 5));
+}
+
+static void cy_flush_buffer(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	int channel, retval;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+	printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
+		return;
+
+	card = info->card;
+	channel = info->line - card->first_line;
+
+	spin_lock_irqsave(&card->card_lock, flags);
+	info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+	spin_unlock_irqrestore(&card->card_lock, flags);
+
+	if (cy_is_Z(card)) {	/* If it is a Z card, flush the on-board
+					   buffers as well */
+		spin_lock_irqsave(&card->card_lock, flags);
+		retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
+				"was %x\n", info->line, retval);
+		}
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	}
+	tty_wakeup(tty);
+}				/* cy_flush_buffer */
+
+
+static void cy_do_close(struct tty_port *port)
+{
+	struct cyclades_port *info = container_of(port, struct cyclades_port,
+								port);
+	struct cyclades_card *card;
+	unsigned long flags;
+	int channel;
+
+	card = info->card;
+	channel = info->line - card->first_line;
+	spin_lock_irqsave(&card->card_lock, flags);
+
+	if (!cy_is_Z(card)) {
+		/* Stop accepting input */
+		cyy_writeb(info, CyCAR, channel & 0x03);
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
+		if (info->port.flags & ASYNC_INITIALIZED) {
+			/* Waiting for on-board buffers to be empty before
+			   closing the port */
+			spin_unlock_irqrestore(&card->card_lock, flags);
+			cy_wait_until_sent(port->tty, info->timeout);
+			spin_lock_irqsave(&card->card_lock, flags);
+		}
+	} else {
+#ifdef Z_WAKE
+		/* Waiting for on-board buffers to be empty before closing
+		   the port */
+		struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+		int retval;
+
+		if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
+			retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
+			if (retval != 0) {
+				printk(KERN_DEBUG "cyc:cy_close retval on "
+					"ttyC%d was %x\n", info->line, retval);
+			}
+			spin_unlock_irqrestore(&card->card_lock, flags);
+			wait_for_completion_interruptible(&info->shutdown_wait);
+			spin_lock_irqsave(&card->card_lock, flags);
+		}
+#endif
+	}
+	spin_unlock_irqrestore(&card->card_lock, flags);
+	cy_shutdown(info, port->tty);
+}
+
+/*
+ * This routine is called when a particular tty device is closed.
+ */
+static void cy_close(struct tty_struct *tty, struct file *filp)
+{
+	struct cyclades_port *info = tty->driver_data;
+	if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
+		return;
+	tty_port_close(&info->port, tty, filp);
+}				/* cy_close */
+
+/* This routine gets called when tty_write has put something into
+ * the write_queue.  The characters may come from user space or
+ * kernel space.
+ *
+ * This routine will return the number of characters actually
+ * accepted for writing.
+ *
+ * If the port is not already transmitting stuff, start it off by
+ * enabling interrupts.  The interrupt service routine will then
+ * ensure that the characters are sent.
+ * If the port is already active, there is no need to kick it.
+ *
+ */
+static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
+{
+	struct cyclades_port *info = tty->driver_data;
+	unsigned long flags;
+	int c, ret = 0;
+
+#ifdef CY_DEBUG_IO
+	printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_write"))
+		return 0;
+
+	if (!info->port.xmit_buf)
+		return 0;
+
+	spin_lock_irqsave(&info->card->card_lock, flags);
+	while (1) {
+		c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
+		c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
+
+		if (c <= 0)
+			break;
+
+		memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
+		info->xmit_head = (info->xmit_head + c) &
+			(SERIAL_XMIT_SIZE - 1);
+		info->xmit_cnt += c;
+		buf += c;
+		count -= c;
+		ret += c;
+	}
+	spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+	info->idle_stats.xmit_bytes += ret;
+	info->idle_stats.xmit_idle = jiffies;
+
+	if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+		start_xmit(info);
+
+	return ret;
+}				/* cy_write */
+
+/*
+ * This routine is called by the kernel to write a single
+ * character to the tty device.  If the kernel uses this routine,
+ * it must call the flush_chars() routine (if defined) when it is
+ * done stuffing characters into the driver.  If there is no room
+ * in the queue, the character is ignored.
+ */
+static int cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+	struct cyclades_port *info = tty->driver_data;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_IO
+	printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_put_char"))
+		return 0;
+
+	if (!info->port.xmit_buf)
+		return 0;
+
+	spin_lock_irqsave(&info->card->card_lock, flags);
+	if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
+		spin_unlock_irqrestore(&info->card->card_lock, flags);
+		return 0;
+	}
+
+	info->port.xmit_buf[info->xmit_head++] = ch;
+	info->xmit_head &= SERIAL_XMIT_SIZE - 1;
+	info->xmit_cnt++;
+	info->idle_stats.xmit_bytes++;
+	info->idle_stats.xmit_idle = jiffies;
+	spin_unlock_irqrestore(&info->card->card_lock, flags);
+	return 1;
+}				/* cy_put_char */
+
+/*
+ * This routine is called by the kernel after it has written a
+ * series of characters to the tty device using put_char().
+ */
+static void cy_flush_chars(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_IO
+	printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
+		return;
+
+	if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+			!info->port.xmit_buf)
+		return;
+
+	start_xmit(info);
+}				/* cy_flush_chars */
+
+/*
+ * This routine returns the numbers of characters the tty driver
+ * will accept for queuing to be written.  This number is subject
+ * to change as output buffers get emptied, or if the output flow
+ * control is activated.
+ */
+static int cy_write_room(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+	int ret;
+
+#ifdef CY_DEBUG_IO
+	printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_write_room"))
+		return 0;
+	ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+	if (ret < 0)
+		ret = 0;
+	return ret;
+}				/* cy_write_room */
+
+static int cy_chars_in_buffer(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+
+	if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
+		return 0;
+
+#ifdef Z_EXT_CHARS_IN_BUFFER
+	if (!cy_is_Z(info->card)) {
+#endif				/* Z_EXT_CHARS_IN_BUFFER */
+#ifdef CY_DEBUG_IO
+		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+			info->line, info->xmit_cnt);
+#endif
+		return info->xmit_cnt;
+#ifdef Z_EXT_CHARS_IN_BUFFER
+	} else {
+		struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
+		int char_count;
+		__u32 tx_put, tx_get, tx_bufsize;
+
+		tx_get = readl(&buf_ctrl->tx_get);
+		tx_put = readl(&buf_ctrl->tx_put);
+		tx_bufsize = readl(&buf_ctrl->tx_bufsize);
+		if (tx_put >= tx_get)
+			char_count = tx_put - tx_get;
+		else
+			char_count = tx_put - tx_get + tx_bufsize;
+#ifdef CY_DEBUG_IO
+		printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
+			info->line, info->xmit_cnt + char_count);
+#endif
+		return info->xmit_cnt + char_count;
+	}
+#endif				/* Z_EXT_CHARS_IN_BUFFER */
+}				/* cy_chars_in_buffer */
+
+/*
+ * ------------------------------------------------------------
+ * cy_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
+{
+	int co, co_val, bpr;
+	__u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
+			25000000);
+
+	if (baud == 0) {
+		info->tbpr = info->tco = info->rbpr = info->rco = 0;
+		return;
+	}
+
+	/* determine which prescaler to use */
+	for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
+		if (cy_clock / co_val / baud > 63)
+			break;
+	}
+
+	bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
+	if (bpr > 255)
+		bpr = 255;
+
+	info->tbpr = info->rbpr = bpr;
+	info->tco = info->rco = co;
+}
+
+/*
+ * This routine finds or computes the various line characteristics.
+ * It used to be called config_setup
+ */
+static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
+{
+	struct cyclades_card *card;
+	unsigned long flags;
+	int channel;
+	unsigned cflag, iflag;
+	int baud, baud_rate = 0;
+	int i;
+
+	if (info->line == -1)
+		return;
+
+	cflag = tty->termios.c_cflag;
+	iflag = tty->termios.c_iflag;
+
+	/*
+	 * Set up the tty->alt_speed kludge
+	 */
+	if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+		tty->alt_speed = 57600;
+	if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+		tty->alt_speed = 115200;
+	if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+		tty->alt_speed = 230400;
+	if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+		tty->alt_speed = 460800;
+
+	card = info->card;
+	channel = info->line - card->first_line;
+
+	if (!cy_is_Z(card)) {
+		u32 cflags;
+
+		/* baud rate */
+		baud = tty_get_baud_rate(tty);
+		if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+				ASYNC_SPD_CUST) {
+			if (info->custom_divisor)
+				baud_rate = info->baud / info->custom_divisor;
+			else
+				baud_rate = info->baud;
+		} else if (baud > CD1400_MAX_SPEED) {
+			baud = CD1400_MAX_SPEED;
+		}
+		/* find the baud index */
+		for (i = 0; i < 20; i++) {
+			if (baud == baud_table[i])
+				break;
+		}
+		if (i == 20)
+			i = 19;	/* CD1400_MAX_SPEED */
+
+		if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+				ASYNC_SPD_CUST) {
+			cyy_baud_calc(info, baud_rate);
+		} else {
+			if (info->chip_rev >= CD1400_REV_J) {
+				/* It is a CD1400 rev. J or later */
+				info->tbpr = baud_bpr_60[i];	/* Tx BPR */
+				info->tco = baud_co_60[i];	/* Tx CO */
+				info->rbpr = baud_bpr_60[i];	/* Rx BPR */
+				info->rco = baud_co_60[i];	/* Rx CO */
+			} else {
+				info->tbpr = baud_bpr_25[i];	/* Tx BPR */
+				info->tco = baud_co_25[i];	/* Tx CO */
+				info->rbpr = baud_bpr_25[i];	/* Rx BPR */
+				info->rco = baud_co_25[i];	/* Rx CO */
+			}
+		}
+		if (baud_table[i] == 134) {
+			/* get it right for 134.5 baud */
+			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+					2;
+		} else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+				ASYNC_SPD_CUST) {
+			info->timeout = (info->xmit_fifo_size * HZ * 15 /
+					baud_rate) + 2;
+		} else if (baud_table[i]) {
+			info->timeout = (info->xmit_fifo_size * HZ * 15 /
+					baud_table[i]) + 2;
+			/* this needs to be propagated into the card info */
+		} else {
+			info->timeout = 0;
+		}
+		/* By tradition (is it a standard?) a baud rate of zero
+		   implies the line should be/has been closed.  A bit
+		   later in this routine such a test is performed. */
+
+		/* byte size and parity */
+		info->cor5 = 0;
+		info->cor4 = 0;
+		/* receive threshold */
+		info->cor3 = (info->default_threshold ?
+				info->default_threshold : baud_cor3[i]);
+		info->cor2 = CyETC;
+		switch (cflag & CSIZE) {
+		case CS5:
+			info->cor1 = Cy_5_BITS;
+			break;
+		case CS6:
+			info->cor1 = Cy_6_BITS;
+			break;
+		case CS7:
+			info->cor1 = Cy_7_BITS;
+			break;
+		case CS8:
+			info->cor1 = Cy_8_BITS;
+			break;
+		}
+		if (cflag & CSTOPB)
+			info->cor1 |= Cy_2_STOP;
+
+		if (cflag & PARENB) {
+			if (cflag & PARODD)
+				info->cor1 |= CyPARITY_O;
+			else
+				info->cor1 |= CyPARITY_E;
+		} else
+			info->cor1 |= CyPARITY_NONE;
+
+		/* CTS flow control flag */
+		if (cflag & CRTSCTS) {
+			info->port.flags |= ASYNC_CTS_FLOW;
+			info->cor2 |= CyCtsAE;
+		} else {
+			info->port.flags &= ~ASYNC_CTS_FLOW;
+			info->cor2 &= ~CyCtsAE;
+		}
+		if (cflag & CLOCAL)
+			info->port.flags &= ~ASYNC_CHECK_CD;
+		else
+			info->port.flags |= ASYNC_CHECK_CD;
+
+	 /***********************************************
+	    The hardware option, CyRtsAO, presents RTS when
+	    the chip has characters to send.  Since most modems
+	    use RTS as reverse (inbound) flow control, this
+	    option is not used.  If inbound flow control is
+	    necessary, DTR can be programmed to provide the
+	    appropriate signals for use with a non-standard
+	    cable.  Contact Marcio Saito for details.
+	 ***********************************************/
+
+		channel &= 0x03;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_writeb(info, CyCAR, channel);
+
+		/* tx and rx baud rate */
+
+		cyy_writeb(info, CyTCOR, info->tco);
+		cyy_writeb(info, CyTBPR, info->tbpr);
+		cyy_writeb(info, CyRCOR, info->rco);
+		cyy_writeb(info, CyRBPR, info->rbpr);
+
+		/* set line characteristics  according configuration */
+
+		cyy_writeb(info, CySCHR1, START_CHAR(tty));
+		cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
+		cyy_writeb(info, CyCOR1, info->cor1);
+		cyy_writeb(info, CyCOR2, info->cor2);
+		cyy_writeb(info, CyCOR3, info->cor3);
+		cyy_writeb(info, CyCOR4, info->cor4);
+		cyy_writeb(info, CyCOR5, info->cor5);
+
+		cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
+				CyCOR3ch);
+
+		/* !!! Is this needed? */
+		cyy_writeb(info, CyCAR, channel);
+		cyy_writeb(info, CyRTPR,
+			(info->default_timeout ? info->default_timeout : 0x02));
+		/* 10ms rx timeout */
+
+		cflags = CyCTS;
+		if (!C_CLOCAL(tty))
+			cflags |= CyDSR | CyRI | CyDCD;
+		/* without modem intr */
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
+		/* act on 1->0 modem transitions */
+		if ((cflag & CRTSCTS) && info->rflow)
+			cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
+		else
+			cyy_writeb(info, CyMCOR1, cflags);
+		/* act on 0->1 modem transitions */
+		cyy_writeb(info, CyMCOR2, cflags);
+
+		if (i == 0)	/* baud rate is zero, turn off line */
+			cyy_change_rts_dtr(info, 0, TIOCM_DTR);
+		else
+			cyy_change_rts_dtr(info, TIOCM_DTR, 0);
+
+		clear_bit(TTY_IO_ERROR, &tty->flags);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+
+	} else {
+		struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+		__u32 sw_flow;
+		int retval;
+
+		if (!cyz_is_loaded(card))
+			return;
+
+		/* baud rate */
+		baud = tty_get_baud_rate(tty);
+		if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+				ASYNC_SPD_CUST) {
+			if (info->custom_divisor)
+				baud_rate = info->baud / info->custom_divisor;
+			else
+				baud_rate = info->baud;
+		} else if (baud > CYZ_MAX_SPEED) {
+			baud = CYZ_MAX_SPEED;
+		}
+		cy_writel(&ch_ctrl->comm_baud, baud);
+
+		if (baud == 134) {
+			/* get it right for 134.5 baud */
+			info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
+					2;
+		} else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
+				ASYNC_SPD_CUST) {
+			info->timeout = (info->xmit_fifo_size * HZ * 15 /
+					baud_rate) + 2;
+		} else if (baud) {
+			info->timeout = (info->xmit_fifo_size * HZ * 15 /
+					baud) + 2;
+			/* this needs to be propagated into the card info */
+		} else {
+			info->timeout = 0;
+		}
+
+		/* byte size and parity */
+		switch (cflag & CSIZE) {
+		case CS5:
+			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
+			break;
+		case CS6:
+			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
+			break;
+		case CS7:
+			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
+			break;
+		case CS8:
+			cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
+			break;
+		}
+		if (cflag & CSTOPB) {
+			cy_writel(&ch_ctrl->comm_data_l,
+				  readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
+		} else {
+			cy_writel(&ch_ctrl->comm_data_l,
+				  readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
+		}
+		if (cflag & PARENB) {
+			if (cflag & PARODD)
+				cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
+			else
+				cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
+		} else
+			cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
+
+		/* CTS flow control flag */
+		if (cflag & CRTSCTS) {
+			cy_writel(&ch_ctrl->hw_flow,
+				readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
+		} else {
+			cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
+					~(C_RS_CTS | C_RS_RTS));
+		}
+		/* As the HW flow control is done in firmware, the driver
+		   doesn't need to care about it */
+		info->port.flags &= ~ASYNC_CTS_FLOW;
+
+		/* XON/XOFF/XANY flow control flags */
+		sw_flow = 0;
+		if (iflag & IXON) {
+			sw_flow |= C_FL_OXX;
+			if (iflag & IXANY)
+				sw_flow |= C_FL_OIXANY;
+		}
+		cy_writel(&ch_ctrl->sw_flow, sw_flow);
+
+		retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
+				"was %x\n", info->line, retval);
+		}
+
+		/* CD sensitivity */
+		if (cflag & CLOCAL)
+			info->port.flags &= ~ASYNC_CHECK_CD;
+		else
+			info->port.flags |= ASYNC_CHECK_CD;
+
+		if (baud == 0) {	/* baud rate is zero, turn off line */
+			cy_writel(&ch_ctrl->rs_control,
+				  readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+			printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
+#endif
+		} else {
+			cy_writel(&ch_ctrl->rs_control,
+				  readl(&ch_ctrl->rs_control) | C_RS_DTR);
+#ifdef CY_DEBUG_DTR
+			printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
+#endif
+		}
+
+		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
+				"was %x\n", info->line, retval);
+		}
+
+		clear_bit(TTY_IO_ERROR, &tty->flags);
+	}
+}				/* set_line_char */
+
+static int cy_get_serial_info(struct cyclades_port *info,
+		struct serial_struct __user *retinfo)
+{
+	struct cyclades_card *cinfo = info->card;
+	struct serial_struct tmp = {
+		.type = info->type,
+		.line = info->line,
+		.port = (info->card - cy_card) * 0x100 + info->line -
+			cinfo->first_line,
+		.irq = cinfo->irq,
+		.flags = info->port.flags,
+		.close_delay = info->port.close_delay,
+		.closing_wait = info->port.closing_wait,
+		.baud_base = info->baud,
+		.custom_divisor = info->custom_divisor,
+		.hub6 = 0,		/*!!! */
+	};
+	return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
+}
+
+static int
+cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
+		struct serial_struct __user *new_info)
+{
+	struct serial_struct new_serial;
+	int ret;
+
+	if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
+		return -EFAULT;
+
+	mutex_lock(&info->port.mutex);
+	if (!capable(CAP_SYS_ADMIN)) {
+		if (new_serial.close_delay != info->port.close_delay ||
+				new_serial.baud_base != info->baud ||
+				(new_serial.flags & ASYNC_FLAGS &
+					~ASYNC_USR_MASK) !=
+				(info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
+		{
+			mutex_unlock(&info->port.mutex);
+			return -EPERM;
+		}
+		info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
+				(new_serial.flags & ASYNC_USR_MASK);
+		info->baud = new_serial.baud_base;
+		info->custom_divisor = new_serial.custom_divisor;
+		goto check_and_exit;
+	}
+
+	/*
+	 * OK, past this point, all the error checking has been done.
+	 * At this point, we start making changes.....
+	 */
+
+	info->baud = new_serial.baud_base;
+	info->custom_divisor = new_serial.custom_divisor;
+	info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
+			(new_serial.flags & ASYNC_FLAGS);
+	info->port.close_delay = new_serial.close_delay * HZ / 100;
+	info->port.closing_wait = new_serial.closing_wait * HZ / 100;
+
+check_and_exit:
+	if (info->port.flags & ASYNC_INITIALIZED) {
+		cy_set_line_char(info, tty);
+		ret = 0;
+	} else {
+		ret = cy_startup(info, tty);
+	}
+	mutex_unlock(&info->port.mutex);
+	return ret;
+}				/* set_serial_info */
+
+/*
+ * get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ *	    is emptied.  On bus types like RS485, the transmitter must
+ *	    release the bus after transmitting. This must be done when
+ *	    the transmit shift register is empty, not be done when the
+ *	    transmit holding register is empty.  This functionality
+ *	    allows an RS485 driver to be written in user space.
+ */
+static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
+{
+	struct cyclades_card *card = info->card;
+	unsigned int result;
+	unsigned long flags;
+	u8 status;
+
+	if (!cy_is_Z(card)) {
+		spin_lock_irqsave(&card->card_lock, flags);
+		status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+		result = (status ? 0 : TIOCSER_TEMT);
+	} else {
+		/* Not supported yet */
+		return -EINVAL;
+	}
+	return put_user(result, value);
+}
+
+static int cy_tiocmget(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	int result;
+
+	if (serial_paranoia_check(info, tty->name, __func__))
+		return -ENODEV;
+
+	card = info->card;
+
+	if (!cy_is_Z(card)) {
+		unsigned long flags;
+		int channel = info->line - card->first_line;
+		u8 status;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_writeb(info, CyCAR, channel & 0x03);
+		status = cyy_readb(info, CyMSVR1);
+		status |= cyy_readb(info, CyMSVR2);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+
+		if (info->rtsdtr_inv) {
+			result = ((status & CyRTS) ? TIOCM_DTR : 0) |
+				((status & CyDTR) ? TIOCM_RTS : 0);
+		} else {
+			result = ((status & CyRTS) ? TIOCM_RTS : 0) |
+				((status & CyDTR) ? TIOCM_DTR : 0);
+		}
+		result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
+			((status & CyRI) ? TIOCM_RNG : 0) |
+			((status & CyDSR) ? TIOCM_DSR : 0) |
+			((status & CyCTS) ? TIOCM_CTS : 0);
+	} else {
+		u32 lstatus;
+
+		if (!cyz_is_loaded(card)) {
+			result = -ENODEV;
+			goto end;
+		}
+
+		lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
+		result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
+			((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
+			((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
+			((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
+			((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
+			((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
+	}
+end:
+	return result;
+}				/* cy_tiomget */
+
+static int
+cy_tiocmset(struct tty_struct *tty,
+		unsigned int set, unsigned int clear)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	unsigned long flags;
+
+	if (serial_paranoia_check(info, tty->name, __func__))
+		return -ENODEV;
+
+	card = info->card;
+	if (!cy_is_Z(card)) {
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_change_rts_dtr(info, set, clear);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	} else {
+		struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+		int retval, channel = info->line - card->first_line;
+		u32 rs;
+
+		if (!cyz_is_loaded(card))
+			return -ENODEV;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+		rs = readl(&ch_ctrl->rs_control);
+		if (set & TIOCM_RTS)
+			rs |= C_RS_RTS;
+		if (clear & TIOCM_RTS)
+			rs &= ~C_RS_RTS;
+		if (set & TIOCM_DTR) {
+			rs |= C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+			printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
+#endif
+		}
+		if (clear & TIOCM_DTR) {
+			rs &= ~C_RS_DTR;
+#ifdef CY_DEBUG_DTR
+			printk(KERN_DEBUG "cyc:set_modem_info clearing "
+				"Z DTR\n");
+#endif
+		}
+		cy_writel(&ch_ctrl->rs_control, rs);
+		retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+		if (retval != 0) {
+			printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
+				"was %x\n", info->line, retval);
+		}
+	}
+	return 0;
+}
+
+/*
+ * cy_break() --- routine which turns the break handling on or off
+ */
+static int cy_break(struct tty_struct *tty, int break_state)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	unsigned long flags;
+	int retval = 0;
+
+	if (serial_paranoia_check(info, tty->name, "cy_break"))
+		return -EINVAL;
+
+	card = info->card;
+
+	spin_lock_irqsave(&card->card_lock, flags);
+	if (!cy_is_Z(card)) {
+		/* Let the transmit ISR take care of this (since it
+		   requires stuffing characters into the output stream).
+		 */
+		if (break_state == -1) {
+			if (!info->breakon) {
+				info->breakon = 1;
+				if (!info->xmit_cnt) {
+					spin_unlock_irqrestore(&card->card_lock, flags);
+					start_xmit(info);
+					spin_lock_irqsave(&card->card_lock, flags);
+				}
+			}
+		} else {
+			if (!info->breakoff) {
+				info->breakoff = 1;
+				if (!info->xmit_cnt) {
+					spin_unlock_irqrestore(&card->card_lock, flags);
+					start_xmit(info);
+					spin_lock_irqsave(&card->card_lock, flags);
+				}
+			}
+		}
+	} else {
+		if (break_state == -1) {
+			retval = cyz_issue_cmd(card,
+				info->line - card->first_line,
+				C_CM_SET_BREAK, 0L);
+			if (retval != 0) {
+				printk(KERN_ERR "cyc:cy_break (set) retval on "
+					"ttyC%d was %x\n", info->line, retval);
+			}
+		} else {
+			retval = cyz_issue_cmd(card,
+				info->line - card->first_line,
+				C_CM_CLR_BREAK, 0L);
+			if (retval != 0) {
+				printk(KERN_DEBUG "cyc:cy_break (clr) retval "
+					"on ttyC%d was %x\n", info->line,
+					retval);
+			}
+		}
+	}
+	spin_unlock_irqrestore(&card->card_lock, flags);
+	return retval;
+}				/* cy_break */
+
+static int set_threshold(struct cyclades_port *info, unsigned long value)
+{
+	struct cyclades_card *card = info->card;
+	unsigned long flags;
+
+	if (!cy_is_Z(card)) {
+		info->cor3 &= ~CyREC_FIFO;
+		info->cor3 |= value & CyREC_FIFO;
+
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_writeb(info, CyCOR3, info->cor3);
+		cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	}
+	return 0;
+}				/* set_threshold */
+
+static int get_threshold(struct cyclades_port *info,
+						unsigned long __user *value)
+{
+	struct cyclades_card *card = info->card;
+
+	if (!cy_is_Z(card)) {
+		u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
+		return put_user(tmp, value);
+	}
+	return 0;
+}				/* get_threshold */
+
+static int set_timeout(struct cyclades_port *info, unsigned long value)
+{
+	struct cyclades_card *card = info->card;
+	unsigned long flags;
+
+	if (!cy_is_Z(card)) {
+		spin_lock_irqsave(&card->card_lock, flags);
+		cyy_writeb(info, CyRTPR, value & 0xff);
+		spin_unlock_irqrestore(&card->card_lock, flags);
+	}
+	return 0;
+}				/* set_timeout */
+
+static int get_timeout(struct cyclades_port *info,
+						unsigned long __user *value)
+{
+	struct cyclades_card *card = info->card;
+
+	if (!cy_is_Z(card)) {
+		u8 tmp = cyy_readb(info, CyRTPR);
+		return put_user(tmp, value);
+	}
+	return 0;
+}				/* get_timeout */
+
+static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
+		struct cyclades_icount *cprev)
+{
+	struct cyclades_icount cnow;
+	unsigned long flags;
+	int ret;
+
+	spin_lock_irqsave(&info->card->card_lock, flags);
+	cnow = info->icount;	/* atomic copy */
+	spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+	ret =	((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
+		((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
+		((arg & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
+		((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
+
+	*cprev = cnow;
+
+	return ret;
+}
+
+/*
+ * This routine allows the tty driver to implement device-
+ * specific ioctl's.  If the ioctl number passed in cmd is
+ * not recognized by the driver, it should return ENOIOCTLCMD.
+ */
+static int
+cy_ioctl(struct tty_struct *tty,
+	 unsigned int cmd, unsigned long arg)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_icount cnow;	/* kernel counter temps */
+	int ret_val = 0;
+	unsigned long flags;
+	void __user *argp = (void __user *)arg;
+
+	if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
+		return -ENODEV;
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
+		info->line, cmd, arg);
+#endif
+
+	switch (cmd) {
+	case CYGETMON:
+		if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
+			ret_val = -EFAULT;
+			break;
+		}
+		memset(&info->mon, 0, sizeof(info->mon));
+		break;
+	case CYGETTHRESH:
+		ret_val = get_threshold(info, argp);
+		break;
+	case CYSETTHRESH:
+		ret_val = set_threshold(info, arg);
+		break;
+	case CYGETDEFTHRESH:
+		ret_val = put_user(info->default_threshold,
+				(unsigned long __user *)argp);
+		break;
+	case CYSETDEFTHRESH:
+		info->default_threshold = arg & 0x0f;
+		break;
+	case CYGETTIMEOUT:
+		ret_val = get_timeout(info, argp);
+		break;
+	case CYSETTIMEOUT:
+		ret_val = set_timeout(info, arg);
+		break;
+	case CYGETDEFTIMEOUT:
+		ret_val = put_user(info->default_timeout,
+				(unsigned long __user *)argp);
+		break;
+	case CYSETDEFTIMEOUT:
+		info->default_timeout = arg & 0xff;
+		break;
+	case CYSETRFLOW:
+		info->rflow = (int)arg;
+		break;
+	case CYGETRFLOW:
+		ret_val = info->rflow;
+		break;
+	case CYSETRTSDTR_INV:
+		info->rtsdtr_inv = (int)arg;
+		break;
+	case CYGETRTSDTR_INV:
+		ret_val = info->rtsdtr_inv;
+		break;
+	case CYGETCD1400VER:
+		ret_val = info->chip_rev;
+		break;
+#ifndef CONFIG_CYZ_INTR
+	case CYZSETPOLLCYCLE:
+		if (arg > LONG_MAX / HZ)
+			return -ENODEV;
+		cyz_polling_cycle = (arg * HZ) / 1000;
+		break;
+	case CYZGETPOLLCYCLE:
+		ret_val = (cyz_polling_cycle * 1000) / HZ;
+		break;
+#endif				/* CONFIG_CYZ_INTR */
+	case CYSETWAIT:
+		info->port.closing_wait = (unsigned short)arg * HZ / 100;
+		break;
+	case CYGETWAIT:
+		ret_val = info->port.closing_wait / (HZ / 100);
+		break;
+	case TIOCGSERIAL:
+		ret_val = cy_get_serial_info(info, argp);
+		break;
+	case TIOCSSERIAL:
+		ret_val = cy_set_serial_info(info, tty, argp);
+		break;
+	case TIOCSERGETLSR:	/* Get line status register */
+		ret_val = get_lsr_info(info, argp);
+		break;
+		/*
+		 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
+		 * - mask passed in arg for lines of interest
+		 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
+		 * Caller should use TIOCGICOUNT to see which one it was
+		 */
+	case TIOCMIWAIT:
+		spin_lock_irqsave(&info->card->card_lock, flags);
+		/* note the counters on entry */
+		cnow = info->icount;
+		spin_unlock_irqrestore(&info->card->card_lock, flags);
+		ret_val = wait_event_interruptible(info->port.delta_msr_wait,
+				cy_cflags_changed(info, arg, &cnow));
+		break;
+
+		/*
+		 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
+		 * Return: write counters to the user passed counter struct
+		 * NB: both 1->0 and 0->1 transitions are counted except for
+		 *     RI where only 0->1 is counted.
+		 */
+	default:
+		ret_val = -ENOIOCTLCMD;
+	}
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_ioctl done\n");
+#endif
+	return ret_val;
+}				/* cy_ioctl */
+
+static int cy_get_icount(struct tty_struct *tty,
+				struct serial_icounter_struct *sic)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_icount cnow;	/* Used to snapshot */
+	unsigned long flags;
+
+	spin_lock_irqsave(&info->card->card_lock, flags);
+	cnow = info->icount;
+	spin_unlock_irqrestore(&info->card->card_lock, flags);
+
+	sic->cts = cnow.cts;
+	sic->dsr = cnow.dsr;
+	sic->rng = cnow.rng;
+	sic->dcd = cnow.dcd;
+	sic->rx = cnow.rx;
+	sic->tx = cnow.tx;
+	sic->frame = cnow.frame;
+	sic->overrun = cnow.overrun;
+	sic->parity = cnow.parity;
+	sic->brk = cnow.brk;
+	sic->buf_overrun = cnow.buf_overrun;
+	return 0;
+}
+
+/*
+ * This routine allows the tty driver to be notified when
+ * device's termios settings have changed.  Note that a
+ * well-designed tty driver should be prepared to accept the case
+ * where old == NULL, and try to do something rational.
+ */
+static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+{
+	struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
+#endif
+
+	cy_set_line_char(info, tty);
+
+	if ((old_termios->c_cflag & CRTSCTS) &&
+			!(tty->termios.c_cflag & CRTSCTS)) {
+		tty->hw_stopped = 0;
+		cy_start(tty);
+	}
+#if 0
+	/*
+	 * No need to wake up processes in open wait, since they
+	 * sample the CLOCAL flag once, and don't recheck it.
+	 * XXX  It's not clear whether the current behavior is correct
+	 * or not.  Hence, this may change.....
+	 */
+	if (!(old_termios->c_cflag & CLOCAL) &&
+	    (tty->termios.c_cflag & CLOCAL))
+		wake_up_interruptible(&info->port.open_wait);
+#endif
+}				/* cy_set_termios */
+
+/* This function is used to send a high-priority XON/XOFF character to
+   the device.
+*/
+static void cy_send_xchar(struct tty_struct *tty, char ch)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	int channel;
+
+	if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
+		return;
+
+	info->x_char = ch;
+
+	if (ch)
+		cy_start(tty);
+
+	card = info->card;
+	channel = info->line - card->first_line;
+
+	if (cy_is_Z(card)) {
+		if (ch == STOP_CHAR(tty))
+			cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
+		else if (ch == START_CHAR(tty))
+			cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
+	}
+}
+
+/* This routine is called by the upper-layer tty layer to signal
+   that incoming characters should be throttled because the input
+   buffers are close to full.
+ */
+static void cy_throttle(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+	char buf[64];
+
+	printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
+			tty->ldisc.chars_in_buffer(tty), info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_throttle"))
+		return;
+
+	card = info->card;
+
+	if (I_IXOFF(tty)) {
+		if (!cy_is_Z(card))
+			cy_send_xchar(tty, STOP_CHAR(tty));
+		else
+			info->throttle = 1;
+	}
+
+	if (tty->termios.c_cflag & CRTSCTS) {
+		if (!cy_is_Z(card)) {
+			spin_lock_irqsave(&card->card_lock, flags);
+			cyy_change_rts_dtr(info, 0, TIOCM_RTS);
+			spin_unlock_irqrestore(&card->card_lock, flags);
+		} else {
+			info->throttle = 1;
+		}
+	}
+}				/* cy_throttle */
+
+/*
+ * This routine notifies the tty driver that it should signal
+ * that characters can now be sent to the tty without fear of
+ * overrunning the input buffers of the line disciplines.
+ */
+static void cy_unthrottle(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+	struct cyclades_card *card;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_THROTTLE
+	char buf[64];
+
+	printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
+		tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
+		return;
+
+	if (I_IXOFF(tty)) {
+		if (info->x_char)
+			info->x_char = 0;
+		else
+			cy_send_xchar(tty, START_CHAR(tty));
+	}
+
+	if (tty->termios.c_cflag & CRTSCTS) {
+		card = info->card;
+		if (!cy_is_Z(card)) {
+			spin_lock_irqsave(&card->card_lock, flags);
+			cyy_change_rts_dtr(info, TIOCM_RTS, 0);
+			spin_unlock_irqrestore(&card->card_lock, flags);
+		} else {
+			info->throttle = 0;
+		}
+	}
+}				/* cy_unthrottle */
+
+/* cy_start and cy_stop provide software output flow control as a
+   function of XON/XOFF, software CTS, and other such stuff.
+*/
+static void cy_stop(struct tty_struct *tty)
+{
+	struct cyclades_card *cinfo;
+	struct cyclades_port *info = tty->driver_data;
+	int channel;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_stop"))
+		return;
+
+	cinfo = info->card;
+	channel = info->line - cinfo->first_line;
+	if (!cy_is_Z(cinfo)) {
+		spin_lock_irqsave(&cinfo->card_lock, flags);
+		cyy_writeb(info, CyCAR, channel & 0x03);
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
+		spin_unlock_irqrestore(&cinfo->card_lock, flags);
+	}
+}				/* cy_stop */
+
+static void cy_start(struct tty_struct *tty)
+{
+	struct cyclades_card *cinfo;
+	struct cyclades_port *info = tty->driver_data;
+	int channel;
+	unsigned long flags;
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_start"))
+		return;
+
+	cinfo = info->card;
+	channel = info->line - cinfo->first_line;
+	if (!cy_is_Z(cinfo)) {
+		spin_lock_irqsave(&cinfo->card_lock, flags);
+		cyy_writeb(info, CyCAR, channel & 0x03);
+		cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
+		spin_unlock_irqrestore(&cinfo->card_lock, flags);
+	}
+}				/* cy_start */
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void cy_hangup(struct tty_struct *tty)
+{
+	struct cyclades_port *info = tty->driver_data;
+
+#ifdef CY_DEBUG_OTHER
+	printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
+#endif
+
+	if (serial_paranoia_check(info, tty->name, "cy_hangup"))
+		return;
+
+	cy_flush_buffer(tty);
+	cy_shutdown(info, tty);
+	tty_port_hangup(&info->port);
+}				/* cy_hangup */
+
+static int cyy_carrier_raised(struct tty_port *port)
+{
+	struct cyclades_port *info = container_of(port, struct cyclades_port,
+			port);
+	struct cyclades_card *cinfo = info->card;
+	unsigned long flags;
+	int channel = info->line - cinfo->first_line;
+	u32 cd;
+
+	spin_lock_irqsave(&cinfo->card_lock, flags);
+	cyy_writeb(info, CyCAR, channel & 0x03);
+	cd = cyy_readb(info, CyMSVR1) & CyDCD;
+	spin_unlock_irqrestore(&cinfo->card_lock, flags);
+
+	return cd;
+}
+
+static void cyy_dtr_rts(struct tty_port *port, int raise)
+{
+	struct cyclades_port *info = container_of(port, struct cyclades_port,
+			port);
+	struct cyclades_card *cinfo = info->card;
+	unsigned long flags;
+
+	spin_lock_irqsave(&cinfo->card_lock, flags);
+	cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
+			raise ? 0 : TIOCM_RTS | TIOCM_DTR);
+	spin_unlock_irqrestore(&cinfo->card_lock, flags);
+}
+
+static int cyz_carrier_raised(struct tty_port *port)
+{
+	struct cyclades_port *info = container_of(port, struct cyclades_port,
+			port);
+
+	return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
+}
+
+static void cyz_dtr_rts(struct tty_port *port, int raise)
+{
+	struct cyclades_port *info = container_of(port, struct cyclades_port,
+			port);
+	struct cyclades_card *cinfo = info->card;
+	struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
+	int ret, channel = info->line - cinfo->first_line;
+	u32 rs;
+
+	rs = readl(&ch_ctrl->rs_control);
+	if (raise)
+		rs |= C_RS_RTS | C_RS_DTR;
+	else
+		rs &= ~(C_RS_RTS | C_RS_DTR);
+	cy_writel(&ch_ctrl->rs_control, rs);
+	ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
+	if (ret != 0)
+		printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
+				__func__, info->line, ret);
+#ifdef CY_DEBUG_DTR
+	printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
+#endif
+}
+
+static const struct tty_port_operations cyy_port_ops = {
+	.carrier_raised = cyy_carrier_raised,
+	.dtr_rts = cyy_dtr_rts,
+	.shutdown = cy_do_close,
+};
+
+static const struct tty_port_operations cyz_port_ops = {
+	.carrier_raised = cyz_carrier_raised,
+	.dtr_rts = cyz_dtr_rts,
+	.shutdown = cy_do_close,
+};
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_init() and friends
+ *
+ * cy_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+static int cy_init_card(struct cyclades_card *cinfo)
+{
+	struct cyclades_port *info;
+	unsigned int channel, port;
+
+	spin_lock_init(&cinfo->card_lock);
+	cinfo->intr_enabled = 0;
+
+	cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
+			GFP_KERNEL);
+	if (cinfo->ports == NULL) {
+		printk(KERN_ERR "Cyclades: cannot allocate ports\n");
+		return -ENOMEM;
+	}
+
+	for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
+			channel++, port++) {
+		info = &cinfo->ports[channel];
+		tty_port_init(&info->port);
+		info->magic = CYCLADES_MAGIC;
+		info->card = cinfo;
+		info->line = port;
+
+		info->port.closing_wait = CLOSING_WAIT_DELAY;
+		info->port.close_delay = 5 * HZ / 10;
+		info->port.flags = STD_COM_FLAGS;
+		init_completion(&info->shutdown_wait);
+
+		if (cy_is_Z(cinfo)) {
+			struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
+			struct ZFW_CTRL *zfw_ctrl;
+
+			info->port.ops = &cyz_port_ops;
+			info->type = PORT_STARTECH;
+
+			zfw_ctrl = cinfo->base_addr +
+				(readl(&firm_id->zfwctrl_addr) & 0xfffff);
+			info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
+			info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
+
+			if (cinfo->hw_ver == ZO_V1)
+				info->xmit_fifo_size = CYZ_FIFO_SIZE;
+			else
+				info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
+#ifdef CONFIG_CYZ_INTR
+			setup_timer(&cyz_rx_full_timer[port],
+				cyz_rx_restart, (unsigned long)info);
+#endif
+		} else {
+			unsigned short chip_number;
+			int index = cinfo->bus_index;
+
+			info->port.ops = &cyy_port_ops;
+			info->type = PORT_CIRRUS;
+			info->xmit_fifo_size = CyMAX_CHAR_FIFO;
+			info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
+			info->cor2 = CyETC;
+			info->cor3 = 0x08;	/* _very_ small rcv threshold */
+
+			chip_number = channel / CyPORTS_PER_CHIP;
+			info->u.cyy.base_addr = cinfo->base_addr +
+				(cy_chip_offset[chip_number] << index);
+			info->chip_rev = cyy_readb(info, CyGFRCR);
+
+			if (info->chip_rev >= CD1400_REV_J) {
+				/* It is a CD1400 rev. J or later */
+				info->tbpr = baud_bpr_60[13];	/* Tx BPR */
+				info->tco = baud_co_60[13];	/* Tx CO */
+				info->rbpr = baud_bpr_60[13];	/* Rx BPR */
+				info->rco = baud_co_60[13];	/* Rx CO */
+				info->rtsdtr_inv = 1;
+			} else {
+				info->tbpr = baud_bpr_25[13];	/* Tx BPR */
+				info->tco = baud_co_25[13];	/* Tx CO */
+				info->rbpr = baud_bpr_25[13];	/* Rx BPR */
+				info->rco = baud_co_25[13];	/* Rx CO */
+				info->rtsdtr_inv = 0;
+			}
+			info->read_status_mask = CyTIMEOUT | CySPECHAR |
+				CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
+		}
+
+	}
+
+#ifndef CONFIG_CYZ_INTR
+	if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
+		mod_timer(&cyz_timerlist, jiffies + 1);
+#ifdef CY_PCI_DEBUG
+		printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
+#endif
+	}
+#endif
+	return 0;
+}
+
+/* initialize chips on Cyclom-Y card -- return number of valid
+   chips (which is number of ports/4) */
+static unsigned short cyy_init_card(void __iomem *true_base_addr,
+		int index)
+{
+	unsigned int chip_number;
+	void __iomem *base_addr;
+
+	cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
+	/* Cy_HwReset is 0x1400 */
+	cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
+	/* Cy_ClrIntr is 0x1800 */
+	udelay(500L);
+
+	for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
+							chip_number++) {
+		base_addr =
+		    true_base_addr + (cy_chip_offset[chip_number] << index);
+		mdelay(1);
+		if (readb(base_addr + (CyCCR << index)) != 0x00) {
+			/*************
+			printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
+			chip_number, (unsigned long)base_addr);
+			*************/
+			return chip_number;
+		}
+
+		cy_writeb(base_addr + (CyGFRCR << index), 0);
+		udelay(10L);
+
+		/* The Cyclom-16Y does not decode address bit 9 and therefore
+		   cannot distinguish between references to chip 0 and a non-
+		   existent chip 4.  If the preceding clearing of the supposed
+		   chip 4 GFRCR register appears at chip 0, there is no chip 4
+		   and this must be a Cyclom-16Y, not a Cyclom-32Ye.
+		 */
+		if (chip_number == 4 && readb(true_base_addr +
+				(cy_chip_offset[0] << index) +
+				(CyGFRCR << index)) == 0) {
+			return chip_number;
+		}
+
+		cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
+		mdelay(1);
+
+		if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
+			/*
+			   printk(" chip #%d at %#6lx is not responding ",
+			   chip_number, (unsigned long)base_addr);
+			   printk("(GFRCR stayed 0)\n",
+			 */
+			return chip_number;
+		}
+		if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
+				0x40) {
+			/*
+			printk(" chip #%d at %#6lx is not valid (GFRCR == "
+					"%#2x)\n",
+					chip_number, (unsigned long)base_addr,
+					base_addr[CyGFRCR<<index]);
+			 */
+			return chip_number;
+		}
+		cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
+		if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
+			/* It is a CD1400 rev. J or later */
+			/* Impossible to reach 5ms with this chip.
+			   Changed to 2ms instead (f = 500 Hz). */
+			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
+		} else {
+			/* f = 200 Hz */
+			cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
+		}
+
+		/*
+		   printk(" chip #%d at %#6lx is rev 0x%2x\n",
+		   chip_number, (unsigned long)base_addr,
+		   readb(base_addr+(CyGFRCR<<index)));
+		 */
+	}
+	return chip_number;
+}				/* cyy_init_card */
+
+/*
+ * ---------------------------------------------------------------------
+ * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
+ * sets global variables and return the number of ISA boards found.
+ * ---------------------------------------------------------------------
+ */
+static int __init cy_detect_isa(void)
+{
+#ifdef CONFIG_ISA
+	struct cyclades_card *card;
+	unsigned short cy_isa_irq, nboard;
+	void __iomem *cy_isa_address;
+	unsigned short i, j, k, cy_isa_nchan;
+	int isparam = 0;
+
+	nboard = 0;
+
+	/* Check for module parameters */
+	for (i = 0; i < NR_CARDS; i++) {
+		if (maddr[i] || i) {
+			isparam = 1;
+			cy_isa_addresses[i] = maddr[i];
+		}
+		if (!maddr[i])
+			break;
+	}
+
+	/* scan the address table probing for Cyclom-Y/ISA boards */
+	for (i = 0; i < NR_ISA_ADDRS; i++) {
+		unsigned int isa_address = cy_isa_addresses[i];
+		if (isa_address == 0x0000)
+			return nboard;
+
+		/* probe for CD1400... */
+		cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
+		if (cy_isa_address == NULL) {
+			printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
+					"address\n");
+			continue;
+		}
+		cy_isa_nchan = CyPORTS_PER_CHIP *
+			cyy_init_card(cy_isa_address, 0);
+		if (cy_isa_nchan == 0) {
+			iounmap(cy_isa_address);
+			continue;
+		}
+
+		if (isparam && i < NR_CARDS && irq[i])
+			cy_isa_irq = irq[i];
+		else
+			/* find out the board's irq by probing */
+			cy_isa_irq = detect_isa_irq(cy_isa_address);
+		if (cy_isa_irq == 0) {
+			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
+				"IRQ could not be detected.\n",
+				(unsigned long)cy_isa_address);
+			iounmap(cy_isa_address);
+			continue;
+		}
+
+		if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
+			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+				"more channels are available. Change NR_PORTS "
+				"in cyclades.c and recompile kernel.\n",
+				(unsigned long)cy_isa_address);
+			iounmap(cy_isa_address);
+			return nboard;
+		}
+		/* fill the next cy_card structure available */
+		for (j = 0; j < NR_CARDS; j++) {
+			card = &cy_card[j];
+			if (card->base_addr == NULL)
+				break;
+		}
+		if (j == NR_CARDS) {	/* no more cy_cards available */
+			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
+				"more cards can be used. Change NR_CARDS in "
+				"cyclades.c and recompile kernel.\n",
+				(unsigned long)cy_isa_address);
+			iounmap(cy_isa_address);
+			return nboard;
+		}
+
+		/* allocate IRQ */
+		if (request_irq(cy_isa_irq, cyy_interrupt,
+				0, "Cyclom-Y", card)) {
+			printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
+				"could not allocate IRQ#%d.\n",
+				(unsigned long)cy_isa_address, cy_isa_irq);
+			iounmap(cy_isa_address);
+			return nboard;
+		}
+
+		/* set cy_card */
+		card->base_addr = cy_isa_address;
+		card->ctl_addr.p9050 = NULL;
+		card->irq = (int)cy_isa_irq;
+		card->bus_index = 0;
+		card->first_line = cy_next_channel;
+		card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
+		card->nports = cy_isa_nchan;
+		if (cy_init_card(card)) {
+			card->base_addr = NULL;
+			free_irq(cy_isa_irq, card);
+			iounmap(cy_isa_address);
+			continue;
+		}
+		nboard++;
+
+		printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
+			"%d channels starting from port %d\n",
+			j + 1, (unsigned long)cy_isa_address,
+			(unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
+			cy_isa_irq, cy_isa_nchan, cy_next_channel);
+
+		for (k = 0, j = cy_next_channel;
+				j < cy_next_channel + cy_isa_nchan; j++, k++)
+			tty_port_register_device(&card->ports[k].port,
+					cy_serial_driver, j, NULL);
+		cy_next_channel += cy_isa_nchan;
+	}
+	return nboard;
+#else
+	return 0;
+#endif				/* CONFIG_ISA */
+}				/* cy_detect_isa */
+
+#ifdef CONFIG_PCI
+static inline int cyc_isfwstr(const char *str, unsigned int size)
+{
+	unsigned int a;
+
+	for (a = 0; a < size && *str; a++, str++)
+		if (*str & 0x80)
+			return -EINVAL;
+
+	for (; a < size; a++, str++)
+		if (*str)
+			return -EINVAL;
+
+	return 0;
+}
+
+static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
+		unsigned int size)
+{
+	for (; size > 0; size--) {
+		cy_writel(fpga, *data++);
+		udelay(10);
+	}
+}
+
+static void plx_init(struct pci_dev *pdev, int irq,
+		struct RUNTIME_9060 __iomem *addr)
+{
+	/* Reset PLX */
+	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
+	udelay(100L);
+	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
+
+	/* Reload Config. Registers from EEPROM */
+	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
+	udelay(100L);
+	cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
+
+	/* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
+	 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
+	 * registers. This will remain here until we find a permanent fix.
+	 */
+	pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
+}
+
+static int __cyz_load_fw(const struct firmware *fw,
+		const char *name, const u32 mailbox, void __iomem *base,
+		void __iomem *fpga)
+{
+	const void *ptr = fw->data;
+	const struct zfile_header *h = ptr;
+	const struct zfile_config *c, *cs;
+	const struct zfile_block *b, *bs;
+	unsigned int a, tmp, len = fw->size;
+#define BAD_FW KERN_ERR "Bad firmware: "
+	if (len < sizeof(*h)) {
+		printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
+		return -EINVAL;
+	}
+
+	cs = ptr + h->config_offset;
+	bs = ptr + h->block_offset;
+
+	if ((void *)(cs + h->n_config) > ptr + len ||
+			(void *)(bs + h->n_blocks) > ptr + len) {
+		printk(BAD_FW "too short");
+		return  -EINVAL;
+	}
+
+	if (cyc_isfwstr(h->name, sizeof(h->name)) ||
+			cyc_isfwstr(h->date, sizeof(h->date))) {
+		printk(BAD_FW "bad formatted header string\n");
+		return -EINVAL;
+	}
+
+	if (strncmp(name, h->name, sizeof(h->name))) {
+		printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
+		return -EINVAL;
+	}
+
+	tmp = 0;
+	for (c = cs; c < cs + h->n_config; c++) {
+		for (a = 0; a < c->n_blocks; a++)
+			if (c->block_list[a] > h->n_blocks) {
+				printk(BAD_FW "bad block ref number in cfgs\n");
+				return -EINVAL;
+			}
+		if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
+			tmp++;
+	}
+	if (!tmp) {
+		printk(BAD_FW "nothing appropriate\n");
+		return -EINVAL;
+	}
+
+	for (b = bs; b < bs + h->n_blocks; b++)
+		if (b->file_offset + b->size > len) {
+			printk(BAD_FW "bad block data offset\n");
+			return -EINVAL;
+		}
+
+	/* everything is OK, let's seek'n'load it */
+	for (c = cs; c < cs + h->n_config; c++)
+		if (c->mailbox == mailbox && c->function == 0)
+			break;
+
+	for (a = 0; a < c->n_blocks; a++) {
+		b = &bs[c->block_list[a]];
+		if (b->type == ZBLOCK_FPGA) {
+			if (fpga != NULL)
+				cyz_fpga_copy(fpga, ptr + b->file_offset,
+						b->size);
+		} else {
+			if (base != NULL)
+				memcpy_toio(base + b->ram_offset,
+					       ptr + b->file_offset, b->size);
+		}
+	}
+#undef BAD_FW
+	return 0;
+}
+
+static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
+		struct RUNTIME_9060 __iomem *ctl_addr, int irq)
+{
+	const struct firmware *fw;
+	struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
+	struct CUSTOM_REG __iomem *cust = base_addr;
+	struct ZFW_CTRL __iomem *pt_zfwctrl;
+	void __iomem *tmp;
+	u32 mailbox, status, nchan;
+	unsigned int i;
+	int retval;
+
+	retval = reject_firmware(&fw, "/*(DEBLOBBED)*/", &pdev->dev);
+	if (retval) {
+		dev_err(&pdev->dev, "can't get firmware\n");
+		goto err;
+	}
+
+	/* Check whether the firmware is already loaded and running. If
+	   positive, skip this board */
+	if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
+		u32 cntval = readl(base_addr + 0x190);
+
+		udelay(100);
+		if (cntval != readl(base_addr + 0x190)) {
+			/* FW counter is working, FW is running */
+			dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
+					"Skipping board.\n");
+			retval = 0;
+			goto err_rel;
+		}
+	}
+
+	/* start boot */
+	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
+			~0x00030800UL);
+
+	mailbox = readl(&ctl_addr->mail_box_0);
+
+	if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
+		/* stops CPU and set window to beginning of RAM */
+		cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+		cy_writel(&cust->cpu_stop, 0);
+		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+		udelay(100);
+	}
+
+	plx_init(pdev, irq, ctl_addr);
+
+	if (mailbox != 0) {
+		/* load FPGA */
+		retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
+				base_addr);
+		if (retval)
+			goto err_rel;
+		if (!__cyz_fpga_loaded(ctl_addr)) {
+			dev_err(&pdev->dev, "fw upload successful, but fw is "
+					"not loaded\n");
+			goto err_rel;
+		}
+	}
+
+	/* stops CPU and set window to beginning of RAM */
+	cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+	cy_writel(&cust->cpu_stop, 0);
+	cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+	udelay(100);
+
+	/* clear memory */
+	for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+		cy_writeb(tmp, 255);
+	if (mailbox != 0) {
+		/* set window to last 512K of RAM */
+		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
+		for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
+			cy_writeb(tmp, 255);
+		/* set window to beginning of RAM */
+		cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+	}
+
+	retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
+	release_firmware(fw);
+	if (retval)
+		goto err;
+
+	/* finish boot and start boards */
+	cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+	cy_writel(&cust->cpu_start, 0);
+	cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+	i = 0;
+	while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
+		msleep(100);
+	if (status != ZFIRM_ID) {
+		if (status == ZFIRM_HLT) {
+			dev_err(&pdev->dev, "you need an external power supply "
+				"for this number of ports. Firmware halted and "
+				"board reset.\n");
+			retval = -EIO;
+			goto err;
+		}
+		dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
+				"some more time\n", status);
+		while ((status = readl(&fid->signature)) != ZFIRM_ID &&
+				i++ < 200)
+			msleep(100);
+		if (status != ZFIRM_ID) {
+			dev_err(&pdev->dev, "Board not started in 20 seconds! "
+					"Giving up. (fid->signature = 0x%x)\n",
+					status);
+			dev_info(&pdev->dev, "*** Warning ***: if you are "
+				"upgrading the FW, please power cycle the "
+				"system before loading the new FW to the "
+				"Cyclades-Z.\n");
+
+			if (__cyz_fpga_loaded(ctl_addr))
+				plx_init(pdev, irq, ctl_addr);
+
+			retval = -EIO;
+			goto err;
+		}
+		dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
+				i / 10);
+	}
+	pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
+
+	dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
+			base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
+			base_addr + readl(&fid->zfwctrl_addr));
+
+	nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
+	dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
+		readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
+
+	if (nchan == 0) {
+		dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
+			"check the connection between the Z host card and the "
+			"serial expanders.\n");
+
+		if (__cyz_fpga_loaded(ctl_addr))
+			plx_init(pdev, irq, ctl_addr);
+
+		dev_info(&pdev->dev, "Null number of ports detected. Board "
+				"reset.\n");
+		retval = 0;
+		goto err;
+	}
+
+	cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
+	cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
+
+	/*
+	   Early firmware failed to start looking for commands.
+	   This enables firmware interrupts for those commands.
+	 */
+	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+			(1 << 17));
+	cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
+			0x00030800UL);
+
+	return nchan;
+err_rel:
+	release_firmware(fw);
+err:
+	return retval;
+}
+
+static int cy_pci_probe(struct pci_dev *pdev,
+		const struct pci_device_id *ent)
+{
+	struct cyclades_card *card;
+	void __iomem *addr0 = NULL, *addr2 = NULL;
+	char *card_name = NULL;
+	u32 uninitialized_var(mailbox);
+	unsigned int device_id, nchan = 0, card_no, i, j;
+	unsigned char plx_ver;
+	int retval, irq;
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		dev_err(&pdev->dev, "cannot enable device\n");
+		goto err;
+	}
+
+	/* read PCI configuration area */
+	irq = pdev->irq;
+	device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
+
+#if defined(__alpha__)
+	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {	/* below 1M? */
+		dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
+			"addresses on Alpha systems.\n");
+		retval = -EIO;
+		goto err_dis;
+	}
+#endif
+	if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
+		dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
+			"addresses\n");
+		retval = -EIO;
+		goto err_dis;
+	}
+
+	if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
+		dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
+				"it...\n");
+		pdev->resource[2].flags &= ~IORESOURCE_IO;
+	}
+
+	retval = pci_request_regions(pdev, "cyclades");
+	if (retval) {
+		dev_err(&pdev->dev, "failed to reserve resources\n");
+		goto err_dis;
+	}
+
+	retval = -EIO;
+	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+		card_name = "Cyclom-Y";
+
+		addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+				CyPCI_Yctl);
+		if (addr0 == NULL) {
+			dev_err(&pdev->dev, "can't remap ctl region\n");
+			goto err_reg;
+		}
+		addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+				CyPCI_Ywin);
+		if (addr2 == NULL) {
+			dev_err(&pdev->dev, "can't remap base region\n");
+			goto err_unmap;
+		}
+
+		nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
+		if (nchan == 0) {
+			dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
+					"Serial-Modules\n");
+			goto err_unmap;
+		}
+	} else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
+		struct RUNTIME_9060 __iomem *ctl_addr;
+
+		ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
+				CyPCI_Zctl);
+		if (addr0 == NULL) {
+			dev_err(&pdev->dev, "can't remap ctl region\n");
+			goto err_reg;
+		}
+
+		/* Disable interrupts on the PLX before resetting it */
+		cy_writew(&ctl_addr->intr_ctrl_stat,
+				readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
+
+		plx_init(pdev, irq, addr0);
+
+		mailbox = readl(&ctl_addr->mail_box_0);
+
+		addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
+				mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
+		if (addr2 == NULL) {
+			dev_err(&pdev->dev, "can't remap base region\n");
+			goto err_unmap;
+		}
+
+		if (mailbox == ZE_V1) {
+			card_name = "Cyclades-Ze";
+		} else {
+			card_name = "Cyclades-8Zo";
+#ifdef CY_PCI_DEBUG
+			if (mailbox == ZO_V1) {
+				cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
+				dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
+					"id %lx, ver %lx\n", (ulong)(0xff &
+					readl(&((struct CUSTOM_REG *)addr2)->
+						fpga_id)), (ulong)(0xff &
+					readl(&((struct CUSTOM_REG *)addr2)->
+						fpga_version)));
+				cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
+			} else {
+				dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
+					"Cyclades-Z board.  FPGA not loaded\n");
+			}
+#endif
+			/* The following clears the firmware id word.  This
+			   ensures that the driver will not attempt to talk to
+			   the board until it has been properly initialized.
+			 */
+			if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
+				cy_writel(addr2 + ID_ADDRESS, 0L);
+		}
+
+		retval = cyz_load_fw(pdev, addr2, addr0, irq);
+		if (retval <= 0)
+			goto err_unmap;
+		nchan = retval;
+	}
+
+	if ((cy_next_channel + nchan) > NR_PORTS) {
+		dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+			"channels are available. Change NR_PORTS in "
+			"cyclades.c and recompile kernel.\n");
+		goto err_unmap;
+	}
+	/* fill the next cy_card structure available */
+	for (card_no = 0; card_no < NR_CARDS; card_no++) {
+		card = &cy_card[card_no];
+		if (card->base_addr == NULL)
+			break;
+	}
+	if (card_no == NR_CARDS) {	/* no more cy_cards available */
+		dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
+			"more cards can be used. Change NR_CARDS in "
+			"cyclades.c and recompile kernel.\n");
+		goto err_unmap;
+	}
+
+	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+		/* allocate IRQ */
+		retval = request_irq(irq, cyy_interrupt,
+				IRQF_SHARED, "Cyclom-Y", card);
+		if (retval) {
+			dev_err(&pdev->dev, "could not allocate IRQ\n");
+			goto err_unmap;
+		}
+		card->num_chips = nchan / CyPORTS_PER_CHIP;
+	} else {
+		struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
+		struct ZFW_CTRL __iomem *zfw_ctrl;
+
+		zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
+
+		card->hw_ver = mailbox;
+		card->num_chips = (unsigned int)-1;
+		card->board_ctrl = &zfw_ctrl->board_ctrl;
+#ifdef CONFIG_CYZ_INTR
+		/* allocate IRQ only if board has an IRQ */
+		if (irq != 0 && irq != 255) {
+			retval = request_irq(irq, cyz_interrupt,
+					IRQF_SHARED, "Cyclades-Z", card);
+			if (retval) {
+				dev_err(&pdev->dev, "could not allocate IRQ\n");
+				goto err_unmap;
+			}
+		}
+#endif				/* CONFIG_CYZ_INTR */
+	}
+
+	/* set cy_card */
+	card->base_addr = addr2;
+	card->ctl_addr.p9050 = addr0;
+	card->irq = irq;
+	card->bus_index = 1;
+	card->first_line = cy_next_channel;
+	card->nports = nchan;
+	retval = cy_init_card(card);
+	if (retval)
+		goto err_null;
+
+	pci_set_drvdata(pdev, card);
+
+	if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
+			device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
+		/* enable interrupts in the PCI interface */
+		plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
+		switch (plx_ver) {
+		case PLX_9050:
+			cy_writeb(addr0 + 0x4c, 0x43);
+			break;
+
+		case PLX_9060:
+		case PLX_9080:
+		default:	/* Old boards, use PLX_9060 */
+		{
+			struct RUNTIME_9060 __iomem *ctl_addr = addr0;
+			plx_init(pdev, irq, ctl_addr);
+			cy_writew(&ctl_addr->intr_ctrl_stat,
+				readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
+			break;
+		}
+		}
+	}
+
+	dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
+		"port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
+	for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++)
+		tty_port_register_device(&card->ports[j].port,
+				cy_serial_driver, i, &pdev->dev);
+	cy_next_channel += nchan;
+
+	return 0;
+err_null:
+	card->base_addr = NULL;
+	free_irq(irq, card);
+err_unmap:
+	iounmap(addr0);
+	if (addr2)
+		iounmap(addr2);
+err_reg:
+	pci_release_regions(pdev);
+err_dis:
+	pci_disable_device(pdev);
+err:
+	return retval;
+}
+
+static void cy_pci_remove(struct pci_dev *pdev)
+{
+	struct cyclades_card *cinfo = pci_get_drvdata(pdev);
+	unsigned int i, channel;
+
+	/* non-Z with old PLX */
+	if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
+			PLX_9050)
+		cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
+	else
+#ifndef CONFIG_CYZ_INTR
+		if (!cy_is_Z(cinfo))
+#endif
+		cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
+			readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
+			~0x0900);
+
+	iounmap(cinfo->base_addr);
+	if (cinfo->ctl_addr.p9050)
+		iounmap(cinfo->ctl_addr.p9050);
+	if (cinfo->irq
+#ifndef CONFIG_CYZ_INTR
+		&& !cy_is_Z(cinfo)
+#endif /* CONFIG_CYZ_INTR */
+		)
+		free_irq(cinfo->irq, cinfo);
+	pci_release_regions(pdev);
+
+	cinfo->base_addr = NULL;
+	for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
+			cinfo->nports; i++, channel++) {
+		tty_unregister_device(cy_serial_driver, i);
+		tty_port_destroy(&cinfo->ports[channel].port);
+	}
+	cinfo->nports = 0;
+	kfree(cinfo->ports);
+}
+
+static struct pci_driver cy_pci_driver = {
+	.name = "cyclades",
+	.id_table = cy_pci_dev_id,
+	.probe = cy_pci_probe,
+	.remove = cy_pci_remove
+};
+#endif
+
+static int cyclades_proc_show(struct seq_file *m, void *v)
+{
+	struct cyclades_port *info;
+	unsigned int i, j;
+	__u32 cur_jifs = jiffies;
+
+	seq_puts(m, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
+			"IdleIn  Overruns  Ldisc\n");
+
+	/* Output one line for each known port */
+	for (i = 0; i < NR_CARDS; i++)
+		for (j = 0; j < cy_card[i].nports; j++) {
+			info = &cy_card[i].ports[j];
+
+			if (info->port.count) {
+				/* XXX is the ldisc num worth this? */
+				struct tty_struct *tty;
+				struct tty_ldisc *ld;
+				int num = 0;
+				tty = tty_port_tty_get(&info->port);
+				if (tty) {
+					ld = tty_ldisc_ref(tty);
+					if (ld) {
+						num = ld->ops->num;
+						tty_ldisc_deref(ld);
+					}
+					tty_kref_put(tty);
+				}
+				seq_printf(m, "%3d %8lu %10lu %8lu "
+					"%10lu %8lu %9lu %6d\n", info->line,
+					(cur_jifs - info->idle_stats.in_use) /
+					HZ, info->idle_stats.xmit_bytes,
+					(cur_jifs - info->idle_stats.xmit_idle)/
+					HZ, info->idle_stats.recv_bytes,
+					(cur_jifs - info->idle_stats.recv_idle)/
+					HZ, info->idle_stats.overruns,
+					num);
+			} else
+				seq_printf(m, "%3d %8lu %10lu %8lu "
+					"%10lu %8lu %9lu %6ld\n",
+					info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
+		}
+	return 0;
+}
+
+static int cyclades_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, cyclades_proc_show, NULL);
+}
+
+static const struct file_operations cyclades_proc_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cyclades_proc_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/* The serial driver boot-time initialization code!
+    Hardware I/O ports are mapped to character special devices on a
+    first found, first allocated manner.  That is, this code searches
+    for Cyclom cards in the system.  As each is found, it is probed
+    to discover how many chips (and thus how many ports) are present.
+    These ports are mapped to the tty ports 32 and upward in monotonic
+    fashion.  If an 8-port card is replaced with a 16-port card, the
+    port mapping on a following card will shift.
+
+    This approach is different from what is used in the other serial
+    device driver because the Cyclom is more properly a multiplexer,
+    not just an aggregation of serial ports on one card.
+
+    If there are more cards with more ports than have been
+    statically allocated above, a warning is printed and the
+    extra ports are ignored.
+ */
+
+static const struct tty_operations cy_ops = {
+	.open = cy_open,
+	.close = cy_close,
+	.write = cy_write,
+	.put_char = cy_put_char,
+	.flush_chars = cy_flush_chars,
+	.write_room = cy_write_room,
+	.chars_in_buffer = cy_chars_in_buffer,
+	.flush_buffer = cy_flush_buffer,
+	.ioctl = cy_ioctl,
+	.throttle = cy_throttle,
+	.unthrottle = cy_unthrottle,
+	.set_termios = cy_set_termios,
+	.stop = cy_stop,
+	.start = cy_start,
+	.hangup = cy_hangup,
+	.break_ctl = cy_break,
+	.wait_until_sent = cy_wait_until_sent,
+	.tiocmget = cy_tiocmget,
+	.tiocmset = cy_tiocmset,
+	.get_icount = cy_get_icount,
+	.proc_fops = &cyclades_proc_fops,
+};
+
+static int __init cy_init(void)
+{
+	unsigned int nboards;
+	int retval = -ENOMEM;
+
+	cy_serial_driver = alloc_tty_driver(NR_PORTS);
+	if (!cy_serial_driver)
+		goto err;
+
+	printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
+
+	/* Initialize the tty_driver structure */
+
+	cy_serial_driver->driver_name = "cyclades";
+	cy_serial_driver->name = "ttyC";
+	cy_serial_driver->major = CYCLADES_MAJOR;
+	cy_serial_driver->minor_start = 0;
+	cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
+	cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
+	cy_serial_driver->init_termios = tty_std_termios;
+	cy_serial_driver->init_termios.c_cflag =
+	    B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+	cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
+	tty_set_operations(cy_serial_driver, &cy_ops);
+
+	retval = tty_register_driver(cy_serial_driver);
+	if (retval) {
+		printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
+		goto err_frtty;
+	}
+
+	/* the code below is responsible to find the boards. Each different
+	   type of board has its own detection routine. If a board is found,
+	   the next cy_card structure available is set by the detection
+	   routine. These functions are responsible for checking the
+	   availability of cy_card and cy_port data structures and updating
+	   the cy_next_channel. */
+
+	/* look for isa boards */
+	nboards = cy_detect_isa();
+
+#ifdef CONFIG_PCI
+	/* look for pci boards */
+	retval = pci_register_driver(&cy_pci_driver);
+	if (retval && !nboards) {
+		tty_unregister_driver(cy_serial_driver);
+		goto err_frtty;
+	}
+#endif
+
+	return 0;
+err_frtty:
+	put_tty_driver(cy_serial_driver);
+err:
+	return retval;
+}				/* cy_init */
+
+static void __exit cy_cleanup_module(void)
+{
+	struct cyclades_card *card;
+	unsigned int i, e1;
+
+#ifndef CONFIG_CYZ_INTR
+	del_timer_sync(&cyz_timerlist);
+#endif /* CONFIG_CYZ_INTR */
+
+	e1 = tty_unregister_driver(cy_serial_driver);
+	if (e1)
+		printk(KERN_ERR "failed to unregister Cyclades serial "
+				"driver(%d)\n", e1);
+
+#ifdef CONFIG_PCI
+	pci_unregister_driver(&cy_pci_driver);
+#endif
+
+	for (i = 0; i < NR_CARDS; i++) {
+		card = &cy_card[i];
+		if (card->base_addr) {
+			/* clear interrupt */
+			cy_writeb(card->base_addr + Cy_ClrIntr, 0);
+			iounmap(card->base_addr);
+			if (card->ctl_addr.p9050)
+				iounmap(card->ctl_addr.p9050);
+			if (card->irq
+#ifndef CONFIG_CYZ_INTR
+				&& !cy_is_Z(card)
+#endif /* CONFIG_CYZ_INTR */
+				)
+				free_irq(card->irq, card);
+			for (e1 = card->first_line; e1 < card->first_line +
+					card->nports; e1++)
+				tty_unregister_device(cy_serial_driver, e1);
+			kfree(card->ports);
+		}
+	}
+
+	put_tty_driver(cy_serial_driver);
+} /* cy_cleanup_module */
+
+module_init(cy_init);
+module_exit(cy_cleanup_module);
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(CY_VERSION);
+MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
+/*(DEBLOBBED)*/