tty/serial: remove the ioc4_serial driver

The SGI SN2 support is about to be removed. Remove this driver that
depends on the SN2 support.

Signed-off-by: Christoph Hellwig <[e-mail]>
Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/configs/generic_defconfig

···
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_SGI_IOC4=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_EFI_RTC=y
 CONFIG_RAW_DRIVER=m

arch/ia64/configs/gensparse_defconfig

···
 CONFIG_SERIAL_8250_NR_UARTS=6
 CONFIG_SERIAL_8250_EXTENDED=y
 CONFIG_SERIAL_8250_SHARE_IRQ=y
-CONFIG_SERIAL_SGI_IOC4=y
 CONFIG_SERIAL_SGI_IOC3=y
 # CONFIG_HW_RANDOM is not set
 CONFIG_EFI_RTC=y

drivers/tty/serial/Kconfig

···
 	  To compile this driver as a module, choose M here: the
 	  module will be called jsm.
 
-config SERIAL_SGI_IOC4
-	tristate "SGI IOC4 controller serial support"
-	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC4
-	select SERIAL_CORE
-	help
-		If you have an SGI Altix with an IOC4 based Base IO card
-		and wish to use the serial ports on this card, say Y.
-		Otherwise, say N.
-
 config SERIAL_SGI_IOC3
 	tristate "SGI Altix IOC3 serial support"
 	depends on (IA64_GENERIC || IA64_SGI_SN2) && SGI_IOC3

drivers/tty/serial/Makefile

···
 obj-$(CONFIG_SERIAL_JSM) += jsm/
 obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
 obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o
-obj-$(CONFIG_SERIAL_SGI_IOC4) += ioc4_serial.o
 obj-$(CONFIG_SERIAL_SGI_IOC3) += ioc3_serial.o
 obj-$(CONFIG_SERIAL_ATMEL) += atmel_serial.o
 obj-$(CONFIG_SERIAL_UARTLITE) += uartlite.o

drivers/tty/serial/ioc4_serial.c

···
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (C) 2003-2006 Silicon Graphics, Inc.  All Rights Reserved.
- */
-
-
-/*
- * This file contains a module version of the ioc4 serial driver. This
- * includes all the support functions needed (support functions, etc.)
- * and the serial driver itself.
- */
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/circ_buf.h>
-#include <linux/serial_reg.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/ioc4.h>
-#include <linux/serial_core.h>
-#include <linux/slab.h>
-
-/*
- * interesting things about the ioc4
- */
-
-#define IOC4_NUM_SERIAL_PORTS	4	/* max ports per card */
-#define IOC4_NUM_CARDS		8	/* max cards per partition */
-
-#define	GET_SIO_IR(_n)	(_n == 0) ? (IOC4_SIO_IR_S0) : \
-				(_n == 1) ? (IOC4_SIO_IR_S1) : \
-				(_n == 2) ? (IOC4_SIO_IR_S2) : \
-				(IOC4_SIO_IR_S3)
-
-#define	GET_OTHER_IR(_n)  (_n == 0) ? (IOC4_OTHER_IR_S0_MEMERR) : \
-				(_n == 1) ? (IOC4_OTHER_IR_S1_MEMERR) : \
-				(_n == 2) ? (IOC4_OTHER_IR_S2_MEMERR) : \
-				(IOC4_OTHER_IR_S3_MEMERR)
-
-
-/*
- * All IOC4 registers are 32 bits wide.
- */
-
-/*
- * PCI Memory Space Map
- */
-#define IOC4_PCI_ERR_ADDR_L     0x000	/* Low Error Address */
-#define IOC4_PCI_ERR_ADDR_VLD	        (0x1 << 0)
-#define IOC4_PCI_ERR_ADDR_MST_ID_MSK    (0xf << 1)
-#define IOC4_PCI_ERR_ADDR_MST_NUM_MSK   (0xe << 1)
-#define IOC4_PCI_ERR_ADDR_MST_TYP_MSK   (0x1 << 1)
-#define IOC4_PCI_ERR_ADDR_MUL_ERR       (0x1 << 5)
-#define IOC4_PCI_ERR_ADDR_ADDR_MSK      (0x3ffffff << 6)
-
-/* Interrupt types */
-#define	IOC4_SIO_INTR_TYPE	0
-#define	IOC4_OTHER_INTR_TYPE	1
-#define	IOC4_NUM_INTR_TYPES	2
-
-/* Bitmasks for IOC4_SIO_IR, IOC4_SIO_IEC, and IOC4_SIO_IES  */
-#define IOC4_SIO_IR_S0_TX_MT	   0x00000001	/* Serial port 0 TX empty */
-#define IOC4_SIO_IR_S0_RX_FULL	   0x00000002	/* Port 0 RX buf full */
-#define IOC4_SIO_IR_S0_RX_HIGH	   0x00000004	/* Port 0 RX hiwat */
-#define IOC4_SIO_IR_S0_RX_TIMER	   0x00000008	/* Port 0 RX timeout */
-#define IOC4_SIO_IR_S0_DELTA_DCD   0x00000010	/* Port 0 delta DCD */
-#define IOC4_SIO_IR_S0_DELTA_CTS   0x00000020	/* Port 0 delta CTS */
-#define IOC4_SIO_IR_S0_INT	   0x00000040	/* Port 0 pass-thru intr */
-#define IOC4_SIO_IR_S0_TX_EXPLICIT 0x00000080	/* Port 0 explicit TX thru */
-#define IOC4_SIO_IR_S1_TX_MT	   0x00000100	/* Serial port 1 */
-#define IOC4_SIO_IR_S1_RX_FULL	   0x00000200	/* */
-#define IOC4_SIO_IR_S1_RX_HIGH	   0x00000400	/* */
-#define IOC4_SIO_IR_S1_RX_TIMER	   0x00000800	/* */
-#define IOC4_SIO_IR_S1_DELTA_DCD   0x00001000	/* */
-#define IOC4_SIO_IR_S1_DELTA_CTS   0x00002000	/* */
-#define IOC4_SIO_IR_S1_INT	   0x00004000	/* */
-#define IOC4_SIO_IR_S1_TX_EXPLICIT 0x00008000	/* */
-#define IOC4_SIO_IR_S2_TX_MT	   0x00010000	/* Serial port 2 */
-#define IOC4_SIO_IR_S2_RX_FULL	   0x00020000	/* */
-#define IOC4_SIO_IR_S2_RX_HIGH	   0x00040000	/* */
-#define IOC4_SIO_IR_S2_RX_TIMER	   0x00080000	/* */
-#define IOC4_SIO_IR_S2_DELTA_DCD   0x00100000	/* */
-#define IOC4_SIO_IR_S2_DELTA_CTS   0x00200000	/* */
-#define IOC4_SIO_IR_S2_INT	   0x00400000	/* */
-#define IOC4_SIO_IR_S2_TX_EXPLICIT 0x00800000	/* */
-#define IOC4_SIO_IR_S3_TX_MT	   0x01000000	/* Serial port 3 */
-#define IOC4_SIO_IR_S3_RX_FULL	   0x02000000	/* */
-#define IOC4_SIO_IR_S3_RX_HIGH	   0x04000000	/* */
-#define IOC4_SIO_IR_S3_RX_TIMER	   0x08000000	/* */
-#define IOC4_SIO_IR_S3_DELTA_DCD   0x10000000	/* */
-#define IOC4_SIO_IR_S3_DELTA_CTS   0x20000000	/* */
-#define IOC4_SIO_IR_S3_INT	   0x40000000	/* */
-#define IOC4_SIO_IR_S3_TX_EXPLICIT 0x80000000	/* */
-
-/* Per device interrupt masks */
-#define IOC4_SIO_IR_S0		(IOC4_SIO_IR_S0_TX_MT | \
-				 IOC4_SIO_IR_S0_RX_FULL | \
-				 IOC4_SIO_IR_S0_RX_HIGH | \
-				 IOC4_SIO_IR_S0_RX_TIMER | \
-				 IOC4_SIO_IR_S0_DELTA_DCD | \
-				 IOC4_SIO_IR_S0_DELTA_CTS | \
-				 IOC4_SIO_IR_S0_INT | \
-				 IOC4_SIO_IR_S0_TX_EXPLICIT)
-#define IOC4_SIO_IR_S1		(IOC4_SIO_IR_S1_TX_MT | \
-				 IOC4_SIO_IR_S1_RX_FULL | \
-				 IOC4_SIO_IR_S1_RX_HIGH | \
-				 IOC4_SIO_IR_S1_RX_TIMER | \
-				 IOC4_SIO_IR_S1_DELTA_DCD | \
-				 IOC4_SIO_IR_S1_DELTA_CTS | \
-				 IOC4_SIO_IR_S1_INT | \
-				 IOC4_SIO_IR_S1_TX_EXPLICIT)
-#define IOC4_SIO_IR_S2		(IOC4_SIO_IR_S2_TX_MT | \
-				 IOC4_SIO_IR_S2_RX_FULL | \
-				 IOC4_SIO_IR_S2_RX_HIGH | \
-				 IOC4_SIO_IR_S2_RX_TIMER | \
-				 IOC4_SIO_IR_S2_DELTA_DCD | \
-				 IOC4_SIO_IR_S2_DELTA_CTS | \
-				 IOC4_SIO_IR_S2_INT | \
-				 IOC4_SIO_IR_S2_TX_EXPLICIT)
-#define IOC4_SIO_IR_S3		(IOC4_SIO_IR_S3_TX_MT | \
-				 IOC4_SIO_IR_S3_RX_FULL | \
-				 IOC4_SIO_IR_S3_RX_HIGH | \
-				 IOC4_SIO_IR_S3_RX_TIMER | \
-				 IOC4_SIO_IR_S3_DELTA_DCD | \
-				 IOC4_SIO_IR_S3_DELTA_CTS | \
-				 IOC4_SIO_IR_S3_INT | \
-				 IOC4_SIO_IR_S3_TX_EXPLICIT)
-
-/* Bitmasks for IOC4_OTHER_IR, IOC4_OTHER_IEC, and IOC4_OTHER_IES  */
-#define IOC4_OTHER_IR_ATA_INT		0x00000001  /* ATAPI intr pass-thru */
-#define IOC4_OTHER_IR_ATA_MEMERR	0x00000002  /* ATAPI DMA PCI error */
-#define IOC4_OTHER_IR_S0_MEMERR		0x00000004  /* Port 0 PCI error */
-#define IOC4_OTHER_IR_S1_MEMERR		0x00000008  /* Port 1 PCI error */
-#define IOC4_OTHER_IR_S2_MEMERR		0x00000010  /* Port 2 PCI error */
-#define IOC4_OTHER_IR_S3_MEMERR		0x00000020  /* Port 3 PCI error */
-#define IOC4_OTHER_IR_KBD_INT		0x00000040  /* Keyboard/mouse */
-#define IOC4_OTHER_IR_RESERVED		0x007fff80  /* Reserved */
-#define IOC4_OTHER_IR_RT_INT		0x00800000  /* INT_OUT section output */
-#define IOC4_OTHER_IR_GEN_INT		0xff000000  /* Generic pins */
-
-#define IOC4_OTHER_IR_SER_MEMERR (IOC4_OTHER_IR_S0_MEMERR | IOC4_OTHER_IR_S1_MEMERR | \
-				  IOC4_OTHER_IR_S2_MEMERR | IOC4_OTHER_IR_S3_MEMERR)
-
-/* Bitmasks for IOC4_SIO_CR */
-#define IOC4_SIO_CR_CMD_PULSE_SHIFT              0  /* byte bus strobe shift */
-#define IOC4_SIO_CR_ARB_DIAG_TX0	0x00000000
-#define IOC4_SIO_CR_ARB_DIAG_RX0	0x00000010
-#define IOC4_SIO_CR_ARB_DIAG_TX1	0x00000020
-#define IOC4_SIO_CR_ARB_DIAG_RX1	0x00000030
-#define IOC4_SIO_CR_ARB_DIAG_TX2	0x00000040
-#define IOC4_SIO_CR_ARB_DIAG_RX2	0x00000050
-#define IOC4_SIO_CR_ARB_DIAG_TX3	0x00000060
-#define IOC4_SIO_CR_ARB_DIAG_RX3	0x00000070
-#define IOC4_SIO_CR_SIO_DIAG_IDLE	0x00000080  /* 0 -> active request among
-							   serial ports (ro) */
-/* Defs for some of the generic I/O pins */
-#define IOC4_GPCR_UART0_MODESEL	   0x10	/* Pin is output to port 0
-						   mode sel */
-#define IOC4_GPCR_UART1_MODESEL	   0x20	/* Pin is output to port 1
-						   mode sel */
-#define IOC4_GPCR_UART2_MODESEL	   0x40	/* Pin is output to port 2
-						   mode sel */
-#define IOC4_GPCR_UART3_MODESEL	   0x80	/* Pin is output to port 3
-						   mode sel */
-
-#define IOC4_GPPR_UART0_MODESEL_PIN   4	/* GIO pin controlling
-					   uart 0 mode select */
-#define IOC4_GPPR_UART1_MODESEL_PIN   5	/* GIO pin controlling
-					   uart 1 mode select */
-#define IOC4_GPPR_UART2_MODESEL_PIN   6	/* GIO pin controlling
-					   uart 2 mode select */
-#define IOC4_GPPR_UART3_MODESEL_PIN   7	/* GIO pin controlling
-					   uart 3 mode select */
-
-/* Bitmasks for serial RX status byte */
-#define IOC4_RXSB_OVERRUN       0x01	/* Char(s) lost */
-#define IOC4_RXSB_PAR_ERR	0x02	/* Parity error */
-#define IOC4_RXSB_FRAME_ERR	0x04	/* Framing error */
-#define IOC4_RXSB_BREAK	        0x08	/* Break character */
-#define IOC4_RXSB_CTS	        0x10	/* State of CTS */
-#define IOC4_RXSB_DCD	        0x20	/* State of DCD */
-#define IOC4_RXSB_MODEM_VALID   0x40	/* DCD, CTS, and OVERRUN are valid */
-#define IOC4_RXSB_DATA_VALID    0x80	/* Data byte, FRAME_ERR PAR_ERR
-					 * & BREAK valid */
-
-/* Bitmasks for serial TX control byte */
-#define IOC4_TXCB_INT_WHEN_DONE 0x20	/* Interrupt after this byte is sent */
-#define IOC4_TXCB_INVALID	0x00	/* Byte is invalid */
-#define IOC4_TXCB_VALID	        0x40	/* Byte is valid */
-#define IOC4_TXCB_MCR	        0x80	/* Data<7:0> to modem control reg */
-#define IOC4_TXCB_DELAY	        0xc0	/* Delay data<7:0> mSec */
-
-/* Bitmasks for IOC4_SBBR_L */
-#define IOC4_SBBR_L_SIZE	0x00000001  /* 0 == 1KB rings, 1 == 4KB rings */
-
-/* Bitmasks for IOC4_SSCR_<3:0> */
-#define IOC4_SSCR_RX_THRESHOLD  0x000001ff  /* Hiwater mark */
-#define IOC4_SSCR_TX_TIMER_BUSY 0x00010000  /* TX timer in progress */
-#define IOC4_SSCR_HFC_EN	0x00020000  /* Hardware flow control enabled */
-#define IOC4_SSCR_RX_RING_DCD   0x00040000  /* Post RX record on delta-DCD */
-#define IOC4_SSCR_RX_RING_CTS   0x00080000  /* Post RX record on delta-CTS */
-#define IOC4_SSCR_DIAG	        0x00200000  /* Bypass clock divider for sim */
-#define IOC4_SSCR_RX_DRAIN	0x08000000  /* Drain RX buffer to memory */
-#define IOC4_SSCR_DMA_EN	0x10000000  /* Enable ring buffer DMA */
-#define IOC4_SSCR_DMA_PAUSE	0x20000000  /* Pause DMA */
-#define IOC4_SSCR_PAUSE_STATE   0x40000000  /* Sets when PAUSE takes effect */
-#define IOC4_SSCR_RESET	        0x80000000  /* Reset DMA channels */
-
-/* All producer/consumer pointers are the same bitfield */
-#define IOC4_PROD_CONS_PTR_4K   0x00000ff8	/* For 4K buffers */
-#define IOC4_PROD_CONS_PTR_1K   0x000003f8	/* For 1K buffers */
-#define IOC4_PROD_CONS_PTR_OFF           3
-
-/* Bitmasks for IOC4_SRCIR_<3:0> */
-#define IOC4_SRCIR_ARM	        0x80000000	/* Arm RX timer */
-
-/* Bitmasks for IOC4_SHADOW_<3:0> */
-#define IOC4_SHADOW_DR	 0x00000001	/* Data ready */
-#define IOC4_SHADOW_OE	 0x00000002	/* Overrun error */
-#define IOC4_SHADOW_PE	 0x00000004	/* Parity error */
-#define IOC4_SHADOW_FE	 0x00000008	/* Framing error */
-#define IOC4_SHADOW_BI	 0x00000010	/* Break interrupt */
-#define IOC4_SHADOW_THRE 0x00000020	/* Xmit holding register empty */
-#define IOC4_SHADOW_TEMT 0x00000040	/* Xmit shift register empty */
-#define IOC4_SHADOW_RFCE 0x00000080	/* Char in RX fifo has an error */
-#define IOC4_SHADOW_DCTS 0x00010000	/* Delta clear to send */
-#define IOC4_SHADOW_DDCD 0x00080000	/* Delta data carrier detect */
-#define IOC4_SHADOW_CTS	 0x00100000	/* Clear to send */
-#define IOC4_SHADOW_DCD	 0x00800000	/* Data carrier detect */
-#define IOC4_SHADOW_DTR	 0x01000000	/* Data terminal ready */
-#define IOC4_SHADOW_RTS	 0x02000000	/* Request to send */
-#define IOC4_SHADOW_OUT1 0x04000000	/* 16550 OUT1 bit */
-#define IOC4_SHADOW_OUT2 0x08000000	/* 16550 OUT2 bit */
-#define IOC4_SHADOW_LOOP 0x10000000	/* Loopback enabled */
-
-/* Bitmasks for IOC4_SRTR_<3:0> */
-#define IOC4_SRTR_CNT	        0x00000fff	/* Reload value for RX timer */
-#define IOC4_SRTR_CNT_VAL	0x0fff0000	/* Current value of RX timer */
-#define IOC4_SRTR_CNT_VAL_SHIFT         16
-#define IOC4_SRTR_HZ                 16000	/* SRTR clock frequency */
-
-/* Serial port register map used for DMA and PIO serial I/O */
-struct ioc4_serialregs {
-	uint32_t sscr;
-	uint32_t stpir;
-	uint32_t stcir;
-	uint32_t srpir;
-	uint32_t srcir;
-	uint32_t srtr;
-	uint32_t shadow;
-};
-
-/* IOC4 UART register map */
-struct ioc4_uartregs {
-	char i4u_lcr;
-	union {
-		char iir;	/* read only */
-		char fcr;	/* write only */
-	} u3;
-	union {
-		char ier;	/* DLAB == 0 */
-		char dlm;	/* DLAB == 1 */
-	} u2;
-	union {
-		char rbr;	/* read only, DLAB == 0 */
-		char thr;	/* write only, DLAB == 0 */
-		char dll;	/* DLAB == 1 */
-	} u1;
-	char i4u_scr;
-	char i4u_msr;
-	char i4u_lsr;
-	char i4u_mcr;
-};
-
-/* short names */
-#define i4u_dll u1.dll
-#define i4u_ier u2.ier
-#define i4u_dlm u2.dlm
-#define i4u_fcr u3.fcr
-
-/* Serial port registers used for DMA serial I/O */
-struct ioc4_serial {
-	uint32_t sbbr01_l;
-	uint32_t sbbr01_h;
-	uint32_t sbbr23_l;
-	uint32_t sbbr23_h;
-
-	struct ioc4_serialregs port_0;
-	struct ioc4_serialregs port_1;
-	struct ioc4_serialregs port_2;
-	struct ioc4_serialregs port_3;
-	struct ioc4_uartregs uart_0;
-	struct ioc4_uartregs uart_1;
-	struct ioc4_uartregs uart_2;
-	struct ioc4_uartregs uart_3;
-};
-
-/* UART clock speed */
-#define IOC4_SER_XIN_CLK_66     66666667
-#define IOC4_SER_XIN_CLK_33     33333333
-
-#define IOC4_W_IES		0
-#define IOC4_W_IEC		1
-
-typedef void ioc4_intr_func_f(void *, uint32_t);
-typedef ioc4_intr_func_f *ioc4_intr_func_t;
-
-static unsigned int Num_of_ioc4_cards;
-
-/* defining this will get you LOTS of great debug info */
-//#define DEBUG_INTERRUPTS
-#define DPRINT_CONFIG(_x...)	;
-//#define DPRINT_CONFIG(_x...)	printk _x
-
-/* number of characters left in xmit buffer before we ask for more */
-#define WAKEUP_CHARS	256
-
-/* number of characters we want to transmit to the lower level at a time */
-#define IOC4_MAX_CHARS	256
-#define IOC4_FIFO_CHARS	255
-
-/* Device name we're using */
-#define DEVICE_NAME_RS232  "ttyIOC"
-#define DEVICE_NAME_RS422  "ttyAIOC"
-#define DEVICE_MAJOR	   204
-#define DEVICE_MINOR_RS232 50
-#define DEVICE_MINOR_RS422 84
-
-
-/* register offsets */
-#define IOC4_SERIAL_OFFSET	0x300
-
-/* flags for next_char_state */
-#define NCS_BREAK	0x1
-#define NCS_PARITY	0x2
-#define NCS_FRAMING	0x4
-#define NCS_OVERRUN	0x8
-
-/* cause we need SOME parameters ... */
-#define MIN_BAUD_SUPPORTED	1200
-#define MAX_BAUD_SUPPORTED	115200
-
-/* protocol types supported */
-#define PROTO_RS232	3
-#define PROTO_RS422	7
-
-/* Notification types */
-#define N_DATA_READY	0x01
-#define N_OUTPUT_LOWAT	0x02
-#define N_BREAK		0x04
-#define N_PARITY_ERROR	0x08
-#define N_FRAMING_ERROR	0x10
-#define N_OVERRUN_ERROR	0x20
-#define N_DDCD		0x40
-#define N_DCTS		0x80
-
-#define N_ALL_INPUT	(N_DATA_READY | N_BREAK |			\
-			 N_PARITY_ERROR | N_FRAMING_ERROR |		\
-			 N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define N_ALL_OUTPUT	N_OUTPUT_LOWAT
-
-#define N_ALL_ERRORS	(N_PARITY_ERROR | N_FRAMING_ERROR | N_OVERRUN_ERROR)
-
-#define N_ALL		(N_DATA_READY | N_OUTPUT_LOWAT | N_BREAK |	\
-			 N_PARITY_ERROR | N_FRAMING_ERROR |		\
-			 N_OVERRUN_ERROR | N_DDCD | N_DCTS)
-
-#define SER_DIVISOR(_x, clk)		(((clk) + (_x) * 8) / ((_x) * 16))
-#define DIVISOR_TO_BAUD(div, clk)	((clk) / 16 / (div))
-
-/* Some masks */
-#define LCR_MASK_BITS_CHAR	(UART_LCR_WLEN5 | UART_LCR_WLEN6 \
-					| UART_LCR_WLEN7 | UART_LCR_WLEN8)
-#define LCR_MASK_STOP_BITS	(UART_LCR_STOP)
-
-#define PENDING(_p)	(readl(&(_p)->ip_mem->sio_ir.raw) & _p->ip_ienb)
-#define READ_SIO_IR(_p) readl(&(_p)->ip_mem->sio_ir.raw)
-
-/* Default to 4k buffers */
-#ifdef IOC4_1K_BUFFERS
-#define RING_BUF_SIZE 1024
-#define IOC4_BUF_SIZE_BIT 0
-#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_1K
-#else
-#define RING_BUF_SIZE 4096
-#define IOC4_BUF_SIZE_BIT IOC4_SBBR_L_SIZE
-#define PROD_CONS_MASK IOC4_PROD_CONS_PTR_4K
-#endif
-
-#define TOTAL_RING_BUF_SIZE (RING_BUF_SIZE * 4)
-
-/*
- * This is the entry saved by the driver - one per card
- */
-
-#define UART_PORT_MIN		0
-#define UART_PORT_RS232		UART_PORT_MIN
-#define UART_PORT_RS422		1
-#define UART_PORT_COUNT		2	/* one for each mode */
-
-struct ioc4_control {
-	int ic_irq;
-	struct {
-		/* uart ports are allocated here - 1 for rs232, 1 for rs422 */
-		struct uart_port icp_uart_port[UART_PORT_COUNT];
-		/* Handy reference material */
-		struct ioc4_port *icp_port;
-	} ic_port[IOC4_NUM_SERIAL_PORTS];
-	struct ioc4_soft *ic_soft;
-};
-
-/*
- * per-IOC4 data structure
- */
-#define MAX_IOC4_INTR_ENTS	(8 * sizeof(uint32_t))
-struct ioc4_soft {
-	struct ioc4_misc_regs __iomem *is_ioc4_misc_addr;
-	struct ioc4_serial __iomem *is_ioc4_serial_addr;
-
-	/* Each interrupt type has an entry in the array */
-	struct ioc4_intr_type {
-
-		/*
-		 * Each in-use entry in this array contains at least
-		 * one nonzero bit in sd_bits; no two entries in this
-		 * array have overlapping sd_bits values.
-		 */
-		struct ioc4_intr_info {
-			uint32_t sd_bits;
-			ioc4_intr_func_f *sd_intr;
-			void *sd_info;
-		} is_intr_info[MAX_IOC4_INTR_ENTS];
-
-		/* Number of entries active in the above array */
-		atomic_t is_num_intrs;
-	} is_intr_type[IOC4_NUM_INTR_TYPES];
-
-	/* is_ir_lock must be held while
-	 * modifying sio_ie values, so
-	 * we can be sure that sio_ie is
-	 * not changing when we read it
-	 * along with sio_ir.
-	 */
-	spinlock_t is_ir_lock;	/* SIO_IE[SC] mod lock */
-};
-
-/* Local port info for each IOC4 serial ports */
-struct ioc4_port {
-	struct uart_port *ip_port;	/* current active port ptr */
-	/* Ptrs for all ports */
-	struct uart_port *ip_all_ports[UART_PORT_COUNT];
-	/* Back ptrs for this port */
-	struct ioc4_control *ip_control;
-	struct pci_dev *ip_pdev;
-	struct ioc4_soft *ip_ioc4_soft;
-
-	/* pci mem addresses */
-	struct ioc4_misc_regs __iomem *ip_mem;
-	struct ioc4_serial __iomem *ip_serial;
-	struct ioc4_serialregs __iomem *ip_serial_regs;
-	struct ioc4_uartregs __iomem *ip_uart_regs;
-
-	/* Ring buffer page for this port */
-	dma_addr_t ip_dma_ringbuf;
-	/* vaddr of ring buffer */
-	struct ring_buffer *ip_cpu_ringbuf;
-
-	/* Rings for this port */
-	struct ring *ip_inring;
-	struct ring *ip_outring;
-
-	/* Hook to port specific values */
-	struct hooks *ip_hooks;
-
-	spinlock_t ip_lock;
-
-	/* Various rx/tx parameters */
-	int ip_baud;
-	int ip_tx_lowat;
-	int ip_rx_timeout;
-
-	/* Copy of notification bits */
-	int ip_notify;
-
-	/* Shadow copies of various registers so we don't need to PIO
-	 * read them constantly
-	 */
-	uint32_t ip_ienb;	/* Enabled interrupts */
-	uint32_t ip_sscr;
-	uint32_t ip_tx_prod;
-	uint32_t ip_rx_cons;
-	int ip_pci_bus_speed;
-	unsigned char ip_flags;
-};
-
-/* tx low water mark.  We need to notify the driver whenever tx is getting
- * close to empty so it can refill the tx buffer and keep things going.
- * Let's assume that if we interrupt 1 ms before the tx goes idle, we'll
- * have no trouble getting in more chars in time (I certainly hope so).
- */
-#define TX_LOWAT_LATENCY      1000
-#define TX_LOWAT_HZ          (1000000 / TX_LOWAT_LATENCY)
-#define TX_LOWAT_CHARS(baud) (baud / 10 / TX_LOWAT_HZ)
-
-/* Flags per port */
-#define INPUT_HIGH	0x01
-#define DCD_ON		0x02
-#define LOWAT_WRITTEN	0x04
-#define READ_ABORTED	0x08
-#define PORT_ACTIVE	0x10
-#define PORT_INACTIVE	0	/* This is the value when "off" */
-
-
-/* Since each port has different register offsets and bitmasks
- * for everything, we'll store those that we need in tables so we
- * don't have to be constantly checking the port we are dealing with.
- */
-struct hooks {
-	uint32_t intr_delta_dcd;
-	uint32_t intr_delta_cts;
-	uint32_t intr_tx_mt;
-	uint32_t intr_rx_timer;
-	uint32_t intr_rx_high;
-	uint32_t intr_tx_explicit;
-	uint32_t intr_dma_error;
-	uint32_t intr_clear;
-	uint32_t intr_all;
-	int rs422_select_pin;
-};
-
-static struct hooks hooks_array[IOC4_NUM_SERIAL_PORTS] = {
-	/* Values for port 0 */
-	{
-	 IOC4_SIO_IR_S0_DELTA_DCD, IOC4_SIO_IR_S0_DELTA_CTS,
-	 IOC4_SIO_IR_S0_TX_MT, IOC4_SIO_IR_S0_RX_TIMER,
-	 IOC4_SIO_IR_S0_RX_HIGH, IOC4_SIO_IR_S0_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S0_MEMERR,
-	 (IOC4_SIO_IR_S0_TX_MT | IOC4_SIO_IR_S0_RX_FULL |
-	  IOC4_SIO_IR_S0_RX_HIGH | IOC4_SIO_IR_S0_RX_TIMER |
-	  IOC4_SIO_IR_S0_DELTA_DCD | IOC4_SIO_IR_S0_DELTA_CTS |
-	  IOC4_SIO_IR_S0_INT | IOC4_SIO_IR_S0_TX_EXPLICIT),
-	 IOC4_SIO_IR_S0, IOC4_GPPR_UART0_MODESEL_PIN,
-	 },
-
-	/* Values for port 1 */
-	{
-	 IOC4_SIO_IR_S1_DELTA_DCD, IOC4_SIO_IR_S1_DELTA_CTS,
-	 IOC4_SIO_IR_S1_TX_MT, IOC4_SIO_IR_S1_RX_TIMER,
-	 IOC4_SIO_IR_S1_RX_HIGH, IOC4_SIO_IR_S1_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S1_MEMERR,
-	 (IOC4_SIO_IR_S1_TX_MT | IOC4_SIO_IR_S1_RX_FULL |
-	  IOC4_SIO_IR_S1_RX_HIGH | IOC4_SIO_IR_S1_RX_TIMER |
-	  IOC4_SIO_IR_S1_DELTA_DCD | IOC4_SIO_IR_S1_DELTA_CTS |
-	  IOC4_SIO_IR_S1_INT | IOC4_SIO_IR_S1_TX_EXPLICIT),
-	 IOC4_SIO_IR_S1, IOC4_GPPR_UART1_MODESEL_PIN,
-	 },
-
-	/* Values for port 2 */
-	{
-	 IOC4_SIO_IR_S2_DELTA_DCD, IOC4_SIO_IR_S2_DELTA_CTS,
-	 IOC4_SIO_IR_S2_TX_MT, IOC4_SIO_IR_S2_RX_TIMER,
-	 IOC4_SIO_IR_S2_RX_HIGH, IOC4_SIO_IR_S2_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S2_MEMERR,
-	 (IOC4_SIO_IR_S2_TX_MT | IOC4_SIO_IR_S2_RX_FULL |
-	  IOC4_SIO_IR_S2_RX_HIGH | IOC4_SIO_IR_S2_RX_TIMER |
-	  IOC4_SIO_IR_S2_DELTA_DCD | IOC4_SIO_IR_S2_DELTA_CTS |
-	  IOC4_SIO_IR_S2_INT | IOC4_SIO_IR_S2_TX_EXPLICIT),
-	 IOC4_SIO_IR_S2, IOC4_GPPR_UART2_MODESEL_PIN,
-	 },
-
-	/* Values for port 3 */
-	{
-	 IOC4_SIO_IR_S3_DELTA_DCD, IOC4_SIO_IR_S3_DELTA_CTS,
-	 IOC4_SIO_IR_S3_TX_MT, IOC4_SIO_IR_S3_RX_TIMER,
-	 IOC4_SIO_IR_S3_RX_HIGH, IOC4_SIO_IR_S3_TX_EXPLICIT,
-	 IOC4_OTHER_IR_S3_MEMERR,
-	 (IOC4_SIO_IR_S3_TX_MT | IOC4_SIO_IR_S3_RX_FULL |
-	  IOC4_SIO_IR_S3_RX_HIGH | IOC4_SIO_IR_S3_RX_TIMER |
-	  IOC4_SIO_IR_S3_DELTA_DCD | IOC4_SIO_IR_S3_DELTA_CTS |
-	  IOC4_SIO_IR_S3_INT | IOC4_SIO_IR_S3_TX_EXPLICIT),
-	 IOC4_SIO_IR_S3, IOC4_GPPR_UART3_MODESEL_PIN,
-	 }
-};
-
-/* A ring buffer entry */
-struct ring_entry {
-	union {
-		struct {
-			uint32_t alldata;
-			uint32_t allsc;
-		} all;
-		struct {
-			char data[4];	/* data bytes */
-			char sc[4];	/* status/control */
-		} s;
-	} u;
-};
-
-/* Test the valid bits in any of the 4 sc chars using "allsc" member */
-#define RING_ANY_VALID \
-	((uint32_t)(IOC4_RXSB_MODEM_VALID | IOC4_RXSB_DATA_VALID) * 0x01010101)
-
-#define ring_sc     u.s.sc
-#define ring_data   u.s.data
-#define ring_allsc  u.all.allsc
-
-/* Number of entries per ring buffer. */
-#define ENTRIES_PER_RING (RING_BUF_SIZE / (int) sizeof(struct ring_entry))
-
-/* An individual ring */
-struct ring {
-	struct ring_entry entries[ENTRIES_PER_RING];
-};
-
-/* The whole enchilada */
-struct ring_buffer {
-	struct ring TX_0_OR_2;
-	struct ring RX_0_OR_2;
-	struct ring TX_1_OR_3;
-	struct ring RX_1_OR_3;
-};
-
-/* Get a ring from a port struct */
-#define RING(_p, _wh)	&(((struct ring_buffer *)((_p)->ip_cpu_ringbuf))->_wh)
-
-/* Infinite loop detection.
- */
-#define MAXITER 10000000
-
-/* Prototypes */
-static void receive_chars(struct uart_port *);
-static void handle_intr(void *arg, uint32_t sio_ir);
-
-/*
- * port_is_active - determines if this port is currently active
- * @port: ptr to soft struct for this port
- * @uart_port: uart port to test for
- */
-static inline int port_is_active(struct ioc4_port *port,
-		struct uart_port *uart_port)
-{
-	if (port) {
-		if ((port->ip_flags & PORT_ACTIVE)
-					&& (port->ip_port == uart_port))
-			return 1;
-	}
-	return 0;
-}
-
-
-/**
- * write_ireg - write the interrupt regs
- * @ioc4_soft: ptr to soft struct for this port
- * @val: value to write
- * @which: which register
- * @type: which ireg set
- */
-static inline void
-write_ireg(struct ioc4_soft *ioc4_soft, uint32_t val, int which, int type)
-{
-	struct ioc4_misc_regs __iomem *mem = ioc4_soft->is_ioc4_misc_addr;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ioc4_soft->is_ir_lock, flags);
-
-	switch (type) {
-	case IOC4_SIO_INTR_TYPE:
-		switch (which) {
-		case IOC4_W_IES:
-			writel(val, &mem->sio_ies.raw);
-			break;
-
-		case IOC4_W_IEC:
-			writel(val, &mem->sio_iec.raw);
-			break;
-		}
-		break;
-
-	case IOC4_OTHER_INTR_TYPE:
-		switch (which) {
-		case IOC4_W_IES:
-			writel(val, &mem->other_ies.raw);
-			break;
-
-		case IOC4_W_IEC:
-			writel(val, &mem->other_iec.raw);
-			break;
-		}
-		break;
-
-	default:
-		break;
-	}
-	spin_unlock_irqrestore(&ioc4_soft->is_ir_lock, flags);
-}
-
-/**
- * set_baud - Baud rate setting code
- * @port: port to set
- * @baud: baud rate to use
- */
-static int set_baud(struct ioc4_port *port, int baud)
-{
-	int actual_baud;
-	int diff;
-	int lcr;
-	unsigned short divisor;
-	struct ioc4_uartregs __iomem *uart;
-
-	divisor = SER_DIVISOR(baud, port->ip_pci_bus_speed);
-	if (!divisor)
-		return 1;
-	actual_baud = DIVISOR_TO_BAUD(divisor, port->ip_pci_bus_speed);
-
-	diff = actual_baud - baud;
-	if (diff < 0)
-		diff = -diff;
-
-	/* If we're within 1%, we've found a match */
-	if (diff * 100 > actual_baud)
-		return 1;
-
-	uart = port->ip_uart_regs;
-	lcr = readb(&uart->i4u_lcr);
-	writeb(lcr | UART_LCR_DLAB, &uart->i4u_lcr);
-	writeb((unsigned char)divisor, &uart->i4u_dll);
-	writeb((unsigned char)(divisor >> 8), &uart->i4u_dlm);
-	writeb(lcr, &uart->i4u_lcr);
-	return 0;
-}
-
-
-/**
- * get_ioc4_port - given a uart port, return the control structure
- * @port: uart port
- * @set: set this port as current
- */
-static struct ioc4_port *get_ioc4_port(struct uart_port *the_port, int set)
-{
-	struct ioc4_driver_data *idd = dev_get_drvdata(the_port->dev);
-	struct ioc4_control *control = idd->idd_serial_data;
-	struct ioc4_port *port;
-	int port_num, port_type;
-
-	if (control) {
-		for ( port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS;
-							port_num++ ) {
-			port = control->ic_port[port_num].icp_port;
-			if (!port)
-				continue;
-			for (port_type = UART_PORT_MIN;
-						port_type < UART_PORT_COUNT;
-						port_type++) {
-				if (the_port == port->ip_all_ports
-							[port_type]) {
-					/* set local copy */
-					if (set) {
-						port->ip_port = the_port;
-					}
-					return port;
-				}
-			}
-		}
-	}
-	return NULL;
-}
-
-/* The IOC4 hardware provides no atomic way to determine if interrupts
- * are pending since two reads are required to do so.  The handler must
- * read the SIO_IR and the SIO_IES, and take the logical and of the
- * two.  When this value is zero, all interrupts have been serviced and
- * the handler may return.
- *
- * This has the unfortunate "hole" that, if some other CPU or
- * some other thread or some higher level interrupt manages to
- * modify SIO_IE between our reads of SIO_IR and SIO_IE, we may
- * think we have observed SIO_IR&SIO_IE==0 when in fact this
- * condition never really occurred.
- *
- * To solve this, we use a simple spinlock that must be held
- * whenever modifying SIO_IE; holding this lock while observing
- * both SIO_IR and SIO_IE guarantees that we do not falsely
- * conclude that no enabled interrupts are pending.
- */
-
-static inline uint32_t
-pending_intrs(struct ioc4_soft *soft, int type)
-{
-	struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;
-	unsigned long flag;
-	uint32_t intrs = 0;
-
-	BUG_ON(!((type == IOC4_SIO_INTR_TYPE)
-	       || (type == IOC4_OTHER_INTR_TYPE)));
-
-	spin_lock_irqsave(&soft->is_ir_lock, flag);
-
-	switch (type) {
-	case IOC4_SIO_INTR_TYPE:
-		intrs = readl(&mem->sio_ir.raw) & readl(&mem->sio_ies.raw);
-		break;
-
-	case IOC4_OTHER_INTR_TYPE:
-		intrs = readl(&mem->other_ir.raw) & readl(&mem->other_ies.raw);
-
-		/* Don't process any ATA interrupte */
-		intrs &= ~(IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);
-		break;
-
-	default:
-		break;
-	}
-	spin_unlock_irqrestore(&soft->is_ir_lock, flag);
-	return intrs;
-}
-
-/**
- * port_init - Initialize the sio and ioc4 hardware for a given port
- *			called per port from attach...
- * @port: port to initialize
- */
-static inline int port_init(struct ioc4_port *port)
-{
-	uint32_t sio_cr;
-	struct hooks *hooks = port->ip_hooks;
-	struct ioc4_uartregs __iomem *uart;
-
-	/* Idle the IOC4 serial interface */
-	writel(IOC4_SSCR_RESET, &port->ip_serial_regs->sscr);
-
-	/* Wait until any pending bus activity for this port has ceased */
-	do
-		sio_cr = readl(&port->ip_mem->sio_cr.raw);
-	while (!(sio_cr & IOC4_SIO_CR_SIO_DIAG_IDLE));
-
-	/* Finish reset sequence */
-	writel(0, &port->ip_serial_regs->sscr);
-
-	/* Once RESET is done, reload cached tx_prod and rx_cons values
-	 * and set rings to empty by making prod == cons
-	 */
-	port->ip_tx_prod = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	writel(port->ip_tx_prod, &port->ip_serial_regs->stpir);
-	port->ip_rx_cons = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	/* Disable interrupts for this 16550 */
-	uart = port->ip_uart_regs;
-	writeb(0, &uart->i4u_lcr);
-	writeb(0, &uart->i4u_ier);
-
-	/* Set the default baud */
-	set_baud(port, port->ip_baud);
-
-	/* Set line control to 8 bits no parity */
-	writeb(UART_LCR_WLEN8 | 0, &uart->i4u_lcr);
-					/* UART_LCR_STOP == 1 stop */
-
-	/* Enable the FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO, &uart->i4u_fcr);
-	/* then reset 16550 FIFOs */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
-			&uart->i4u_fcr);
-
-	/* Clear modem control register */
-	writeb(0, &uart->i4u_mcr);
-
-	/* Clear deltas in modem status register */
-	readb(&uart->i4u_msr);
-
-	/* Only do this once per port pair */
-	if (port->ip_hooks == &hooks_array[0]
-			    || port->ip_hooks == &hooks_array[2]) {
-		unsigned long ring_pci_addr;
-		uint32_t __iomem *sbbr_l;
-		uint32_t __iomem *sbbr_h;
-
-		if (port->ip_hooks == &hooks_array[0]) {
-			sbbr_l = &port->ip_serial->sbbr01_l;
-			sbbr_h = &port->ip_serial->sbbr01_h;
-		} else {
-			sbbr_l = &port->ip_serial->sbbr23_l;
-			sbbr_h = &port->ip_serial->sbbr23_h;
-		}
-
-		ring_pci_addr = (unsigned long __iomem)port->ip_dma_ringbuf;
-		DPRINT_CONFIG(("%s: ring_pci_addr 0x%lx\n",
-					__func__, ring_pci_addr));
-
-		writel((unsigned int)((uint64_t)ring_pci_addr >> 32), sbbr_h);
-		writel((unsigned int)ring_pci_addr | IOC4_BUF_SIZE_BIT, sbbr_l);
-	}
-
-	/* Set the receive timeout value to 10 msec */
-	writel(IOC4_SRTR_HZ / 100, &port->ip_serial_regs->srtr);
-
-	/* Set rx threshold, enable DMA */
-	/* Set high water mark at 3/4 of full ring */
-	port->ip_sscr = (ENTRIES_PER_RING * 3 / 4);
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Disable and clear all serial related interrupt bits */
-	write_ireg(port->ip_ioc4_soft, hooks->intr_clear,
-		       IOC4_W_IEC, IOC4_SIO_INTR_TYPE);
-	port->ip_ienb &= ~hooks->intr_clear;
-	writel(hooks->intr_clear, &port->ip_mem->sio_ir.raw);
-	return 0;
-}
-
-/**
- * handle_dma_error_intr - service any pending DMA error interrupts for the
- *			given port - 2nd level called via sd_intr
- * @arg: handler arg
- * @other_ir: ioc4regs
- */
-static void handle_dma_error_intr(void *arg, uint32_t other_ir)
-{
-	struct ioc4_port *port = (struct ioc4_port *)arg;
-	struct hooks *hooks = port->ip_hooks;
-	unsigned long flags;
-
-	spin_lock_irqsave(&port->ip_lock, flags);
-
-	/* ACK the interrupt */
-	writel(hooks->intr_dma_error, &port->ip_mem->other_ir.raw);
-
-	if (readl(&port->ip_mem->pci_err_addr_l.raw) & IOC4_PCI_ERR_ADDR_VLD) {
-		printk(KERN_ERR
-			"PCI error address is 0x%llx, "
-				"master is serial port %c %s\n",
-		     (((uint64_t)readl(&port->ip_mem->pci_err_addr_h)
-							 << 32)
-				| readl(&port->ip_mem->pci_err_addr_l.raw))
-					& IOC4_PCI_ERR_ADDR_ADDR_MSK, '1' +
-		     ((char)(readl(&port->ip_mem->pci_err_addr_l.raw) &
-			     IOC4_PCI_ERR_ADDR_MST_NUM_MSK) >> 1),
-		     (readl(&port->ip_mem->pci_err_addr_l.raw)
-				& IOC4_PCI_ERR_ADDR_MST_TYP_MSK)
-				? "RX" : "TX");
-
-		if (readl(&port->ip_mem->pci_err_addr_l.raw)
-						& IOC4_PCI_ERR_ADDR_MUL_ERR) {
-			printk(KERN_ERR
-				"Multiple errors occurred\n");
-		}
-	}
-	spin_unlock_irqrestore(&port->ip_lock, flags);
-
-	/* Re-enable DMA error interrupts */
-	write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error, IOC4_W_IES,
-						IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * intr_connect - interrupt connect function
- * @soft: soft struct for this card
- * @type: interrupt type
- * @intrbits: bit pattern to set
- * @intr: handler function
- * @info: handler arg
- */
-static void
-intr_connect(struct ioc4_soft *soft, int type,
-		  uint32_t intrbits, ioc4_intr_func_f * intr, void *info)
-{
-	int i;
-	struct ioc4_intr_info *intr_ptr;
-
-	BUG_ON(!((type == IOC4_SIO_INTR_TYPE)
-	       || (type == IOC4_OTHER_INTR_TYPE)));
-
-	i = atomic_inc_return(&soft-> is_intr_type[type].is_num_intrs) - 1;
-	BUG_ON(!(i < MAX_IOC4_INTR_ENTS || (printk("i %d\n", i), 0)));
-
-	/* Save off the lower level interrupt handler */
-	intr_ptr = &soft->is_intr_type[type].is_intr_info[i];
-	intr_ptr->sd_bits = intrbits;
-	intr_ptr->sd_intr = intr;
-	intr_ptr->sd_info = info;
-}
-
-/**
- * ioc4_intr - Top level IOC4 interrupt handler.
- * @irq: irq value
- * @arg: handler arg
- */
-
-static irqreturn_t ioc4_intr(int irq, void *arg)
-{
-	struct ioc4_soft *soft;
-	uint32_t this_ir, this_mir;
-	int xx, num_intrs = 0;
-	int intr_type;
-	int handled = 0;
-	struct ioc4_intr_info *intr_info;
-
-	soft = arg;
-	for (intr_type = 0; intr_type < IOC4_NUM_INTR_TYPES; intr_type++) {
-		num_intrs = (int)atomic_read(
-				&soft->is_intr_type[intr_type].is_num_intrs);
-
-		this_mir = this_ir = pending_intrs(soft, intr_type);
-
-		/* Farm out the interrupt to the various drivers depending on
-		 * which interrupt bits are set.
-		 */
-		for (xx = 0; xx < num_intrs; xx++) {
-			intr_info = &soft->is_intr_type[intr_type].is_intr_info[xx];
-			this_mir = this_ir & intr_info->sd_bits;
-			if (this_mir) {
-				/* Disable owned interrupts, call handler */
-				handled++;
-				write_ireg(soft, intr_info->sd_bits, IOC4_W_IEC,
-								intr_type);
-				intr_info->sd_intr(intr_info->sd_info, this_mir);
-				this_ir &= ~this_mir;
-			}
-		}
-	}
-#ifdef DEBUG_INTERRUPTS
-	{
-		struct ioc4_misc_regs __iomem *mem = soft->is_ioc4_misc_addr;
-		unsigned long flag;
-
-		spin_lock_irqsave(&soft->is_ir_lock, flag);
-		printk ("%s : %d : mem 0x%p sio_ir 0x%x sio_ies 0x%x "
-				"other_ir 0x%x other_ies 0x%x mask 0x%x\n",
-		     __func__, __LINE__,
-		     (void *)mem, readl(&mem->sio_ir.raw),
-		     readl(&mem->sio_ies.raw),
-		     readl(&mem->other_ir.raw),
-		     readl(&mem->other_ies.raw),
-		     IOC4_OTHER_IR_ATA_INT | IOC4_OTHER_IR_ATA_MEMERR);
-		spin_unlock_irqrestore(&soft->is_ir_lock, flag);
-	}
-#endif
-	return handled ? IRQ_HANDLED : IRQ_NONE;
-}
-
-/**
- * ioc4_attach_local - Device initialization.
- *			Called at *_attach() time for each
- *			IOC4 with serial ports in the system.
- * @idd: Master module data for this IOC4
- */
-static inline int ioc4_attach_local(struct ioc4_driver_data *idd)
-{
-	struct ioc4_port *port;
-	struct ioc4_port *ports[IOC4_NUM_SERIAL_PORTS];
-	int port_number;
-	uint16_t ioc4_revid_min = 62;
-	uint16_t ioc4_revid;
-	struct pci_dev *pdev = idd->idd_pdev;
-	struct ioc4_control* control = idd->idd_serial_data;
-	struct ioc4_soft *soft = control->ic_soft;
-	void __iomem *ioc4_misc = idd->idd_misc_regs;
-	void __iomem *ioc4_serial = soft->is_ioc4_serial_addr;
-
-	/* IOC4 firmware must be at least rev 62 */
-	pci_read_config_word(pdev, PCI_COMMAND_SPECIAL, &ioc4_revid);
-
-	printk(KERN_INFO "IOC4 firmware revision %d\n", ioc4_revid);
-	if (ioc4_revid < ioc4_revid_min) {
-		printk(KERN_WARNING
-		    "IOC4 serial not supported on firmware rev %d, "
-				"please upgrade to rev %d or higher\n",
-				ioc4_revid, ioc4_revid_min);
-		return -EPERM;
-	}
-	BUG_ON(ioc4_misc == NULL);
-	BUG_ON(ioc4_serial == NULL);
-
-	/* Create port structures for each port */
-	for (port_number = 0; port_number < IOC4_NUM_SERIAL_PORTS;
-							port_number++) {
-		port = kzalloc(sizeof(struct ioc4_port), GFP_KERNEL);
-		if (!port) {
-			printk(KERN_WARNING
-				"IOC4 serial memory not available for port\n");
-			goto free;
-		}
-		spin_lock_init(&port->ip_lock);
-
-		/* we need to remember the previous ones, to point back to
-		 * them farther down - setting up the ring buffers.
-		 */
-		ports[port_number] = port;
-
-		/* Allocate buffers and jumpstart the hardware.  */
-		control->ic_port[port_number].icp_port = port;
-		port->ip_ioc4_soft = soft;
-		port->ip_pdev = pdev;
-		port->ip_ienb = 0;
-		/* Use baud rate calculations based on detected PCI
-		 * bus speed.  Simply test whether the PCI clock is
-		 * running closer to 66MHz or 33MHz.
-		 */
-		if (idd->count_period/IOC4_EXTINT_COUNT_DIVISOR < 20) {
-			port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_66;
-		} else {
-			port->ip_pci_bus_speed = IOC4_SER_XIN_CLK_33;
-		}
-		port->ip_baud = 9600;
-		port->ip_control = control;
-		port->ip_mem = ioc4_misc;
-		port->ip_serial = ioc4_serial;
-
-		/* point to the right hook */
-		port->ip_hooks = &hooks_array[port_number];
-
-		/* Get direct hooks to the serial regs and uart regs
-		 * for this port
-		 */
-		switch (port_number) {
-		case 0:
-			port->ip_serial_regs = &(port->ip_serial->port_0);
-			port->ip_uart_regs = &(port->ip_serial->uart_0);
-			break;
-		case 1:
-			port->ip_serial_regs = &(port->ip_serial->port_1);
-			port->ip_uart_regs = &(port->ip_serial->uart_1);
-			break;
-		case 2:
-			port->ip_serial_regs = &(port->ip_serial->port_2);
-			port->ip_uart_regs = &(port->ip_serial->uart_2);
-			break;
-		default:
-		case 3:
-			port->ip_serial_regs = &(port->ip_serial->port_3);
-			port->ip_uart_regs = &(port->ip_serial->uart_3);
-			break;
-		}
-
-		/* ring buffers are 1 to a pair of ports */
-		if (port_number && (port_number & 1)) {
-			/* odd use the evens buffer */
-			port->ip_dma_ringbuf =
-					ports[port_number - 1]->ip_dma_ringbuf;
-			port->ip_cpu_ringbuf =
-					ports[port_number - 1]->ip_cpu_ringbuf;
-			port->ip_inring = RING(port, RX_1_OR_3);
-			port->ip_outring = RING(port, TX_1_OR_3);
-
-		} else {
-			if (port->ip_dma_ringbuf == 0) {
-				port->ip_cpu_ringbuf = pci_alloc_consistent
-					(pdev, TOTAL_RING_BUF_SIZE,
-					&port->ip_dma_ringbuf);
-
-			}
-			BUG_ON(!((((int64_t)port->ip_dma_ringbuf) &
-				(TOTAL_RING_BUF_SIZE - 1)) == 0));
-			DPRINT_CONFIG(("%s : ip_cpu_ringbuf 0x%p "
-						"ip_dma_ringbuf 0x%p\n",
-					__func__,
-					(void *)port->ip_cpu_ringbuf,
-					(void *)port->ip_dma_ringbuf));
-			port->ip_inring = RING(port, RX_0_OR_2);
-			port->ip_outring = RING(port, TX_0_OR_2);
-		}
-		DPRINT_CONFIG(("%s : port %d [addr 0x%p] control 0x%p",
-				__func__,
-				port_number, (void *)port, (void *)control));
-		DPRINT_CONFIG((" ip_serial_regs 0x%p ip_uart_regs 0x%p\n",
-				(void *)port->ip_serial_regs,
-				(void *)port->ip_uart_regs));
-
-		/* Initialize the hardware for IOC4 */
-		port_init(port);
-
-		DPRINT_CONFIG(("%s: port_number %d port 0x%p inring 0x%p "
-						"outring 0x%p\n",
-				__func__,
-				port_number, (void *)port,
-				(void *)port->ip_inring,
-				(void *)port->ip_outring));
-
-		/* Attach interrupt handlers */
-		intr_connect(soft, IOC4_SIO_INTR_TYPE,
-				GET_SIO_IR(port_number),
-				handle_intr, port);
-
-		intr_connect(soft, IOC4_OTHER_INTR_TYPE,
-				GET_OTHER_IR(port_number),
-				handle_dma_error_intr, port);
-	}
-	return 0;
-
-free:
-	while (port_number)
-		kfree(ports[--port_number]);
-	return -ENOMEM;
-}
-
-/**
- * enable_intrs - enable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static void enable_intrs(struct ioc4_port *port, uint32_t mask)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	if ((port->ip_ienb & mask) != mask) {
-		write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IES,
-						IOC4_SIO_INTR_TYPE);
-		port->ip_ienb |= mask;
-	}
-
-	if (port->ip_ienb)
-		write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error,
-				IOC4_W_IES, IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * local_open - local open a port
- * @port: port to open
- */
-static inline int local_open(struct ioc4_port *port)
-{
-	int spiniter = 0;
-
-	port->ip_flags = PORT_ACTIVE;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while((readl(&port->ip_serial_regs-> sscr)
-				& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER) {
-				port->ip_flags = PORT_INACTIVE;
-				return -1;
-			}
-		}
-	}
-
-	/* Reset the input fifo.  If the uart received chars while the port
-	 * was closed and DMA is not enabled, the uart may have a bunch of
-	 * chars hanging around in its rx fifo which will not be discarded
-	 * by rclr in the upper layer. We must get rid of them here.
-	 */
-	writeb(UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR,
-				&port->ip_uart_regs->i4u_fcr);
-
-	writeb(UART_LCR_WLEN8, &port->ip_uart_regs->i4u_lcr);
-					/* UART_LCR_STOP == 1 stop */
-
-	/* Re-enable DMA, set default threshold to intr whenever there is
-	 * data available.
-	 */
-	port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD;
-	port->ip_sscr |= 1;	/* default threshold */
-
-	/* Plug in the new sscr.  This implicitly clears the DMA_PAUSE
-	 * flag if it was set above
-	 */
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	port->ip_tx_lowat = 1;
-	return 0;
-}
-
-/**
- * set_rx_timeout - Set rx timeout and threshold values.
- * @port: port to use
- * @timeout: timeout value in ticks
- */
-static inline int set_rx_timeout(struct ioc4_port *port, int timeout)
-{
-	int threshold;
-
-	port->ip_rx_timeout = timeout;
-
-	/* Timeout is in ticks.  Let's figure out how many chars we
-	 * can receive at the current baud rate in that interval
-	 * and set the rx threshold to that amount.  There are 4 chars
-	 * per ring entry, so we'll divide the number of chars that will
-	 * arrive in timeout by 4.
-	 * So .... timeout * baud / 10 / HZ / 4, with HZ = 100.
-	 */
-	threshold = timeout * port->ip_baud / 4000;
-	if (threshold == 0)
-		threshold = 1;	/* otherwise we'll intr all the time! */
-
-	if ((unsigned)threshold > (unsigned)IOC4_SSCR_RX_THRESHOLD)
-		return 1;
-
-	port->ip_sscr &= ~IOC4_SSCR_RX_THRESHOLD;
-	port->ip_sscr |= threshold;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Now set the rx timeout to the given value
-	 * again timeout * IOC4_SRTR_HZ / HZ
-	 */
-	timeout = timeout * IOC4_SRTR_HZ / 100;
-	if (timeout > IOC4_SRTR_CNT)
-		timeout = IOC4_SRTR_CNT;
-
-	writel(timeout, &port->ip_serial_regs->srtr);
-	return 0;
-}
-
-/**
- * config_port - config the hardware
- * @port: port to config
- * @baud: baud rate for the port
- * @byte_size: data size
- * @stop_bits: number of stop bits
- * @parenb: parity enable ?
- * @parodd: odd parity ?
- */
-static inline int
-config_port(struct ioc4_port *port,
-	    int baud, int byte_size, int stop_bits, int parenb, int parodd)
-{
-	char lcr, sizebits;
-	int spiniter = 0;
-
-	DPRINT_CONFIG(("%s: baud %d byte_size %d stop %d parenb %d parodd %d\n",
-		__func__, baud, byte_size, stop_bits, parenb, parodd));
-
-	if (set_baud(port, baud))
-		return 1;
-
-	switch (byte_size) {
-	case 5:
-		sizebits = UART_LCR_WLEN5;
-		break;
-	case 6:
-		sizebits = UART_LCR_WLEN6;
-		break;
-	case 7:
-		sizebits = UART_LCR_WLEN7;
-		break;
-	case 8:
-		sizebits = UART_LCR_WLEN8;
-		break;
-	default:
-		return 1;
-	}
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while((readl(&port->ip_serial_regs->sscr)
-						& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-
-	/* Clear relevant fields in lcr */
-	lcr = readb(&port->ip_uart_regs->i4u_lcr);
-	lcr &= ~(LCR_MASK_BITS_CHAR | UART_LCR_EPAR |
-		 UART_LCR_PARITY | LCR_MASK_STOP_BITS);
-
-	/* Set byte size in lcr */
-	lcr |= sizebits;
-
-	/* Set parity */
-	if (parenb) {
-		lcr |= UART_LCR_PARITY;
-		if (!parodd)
-			lcr |= UART_LCR_EPAR;
-	}
-
-	/* Set stop bits */
-	if (stop_bits)
-		lcr |= UART_LCR_STOP /* 2 stop bits */ ;
-
-	writeb(lcr, &port->ip_uart_regs->i4u_lcr);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	port->ip_baud = baud;
-
-	/* When we get within this number of ring entries of filling the
-	 * entire ring on tx, place an EXPLICIT intr to generate a lowat
-	 * notification when output has drained.
-	 */
-	port->ip_tx_lowat = (TX_LOWAT_CHARS(baud) + 3) / 4;
-	if (port->ip_tx_lowat == 0)
-		port->ip_tx_lowat = 1;
-
-	set_rx_timeout(port, 2);
-
-	return 0;
-}
-
-/**
- * do_write - Write bytes to the port.  Returns the number of bytes
- *			actually written. Called from transmit_chars
- * @port: port to use
- * @buf: the stuff to write
- * @len: how many bytes in 'buf'
- */
-static inline int do_write(struct ioc4_port *port, char *buf, int len)
-{
-	int prod_ptr, cons_ptr, total = 0;
-	struct ring *outring;
-	struct ring_entry *entry;
-	struct hooks *hooks = port->ip_hooks;
-
-	BUG_ON(!(len >= 0));
-
-	prod_ptr = port->ip_tx_prod;
-	cons_ptr = readl(&port->ip_serial_regs->stcir) & PROD_CONS_MASK;
-	outring = port->ip_outring;
-
-	/* Maintain a 1-entry red-zone.  The ring buffer is full when
-	 * (cons - prod) % ring_size is 1.  Rather than do this subtraction
-	 * in the body of the loop, I'll do it now.
-	 */
-	cons_ptr = (cons_ptr - (int)sizeof(struct ring_entry)) & PROD_CONS_MASK;
-
-	/* Stuff the bytes into the output */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		int xx;
-
-		/* Get 4 bytes (one ring entry) at a time */
-		entry = (struct ring_entry *)((caddr_t) outring + prod_ptr);
-
-		/* Invalidate all entries */
-		entry->ring_allsc = 0;
-
-		/* Copy in some bytes */
-		for (xx = 0; (xx < 4) && (len > 0); xx++) {
-			entry->ring_data[xx] = *buf++;
-			entry->ring_sc[xx] = IOC4_TXCB_VALID;
-			len--;
-			total++;
-		}
-
-		/* If we are within some small threshold of filling up the
-		 * entire ring buffer, we must place an EXPLICIT intr here
-		 * to generate a lowat interrupt in case we subsequently
-		 * really do fill up the ring and the caller goes to sleep.
-		 * No need to place more than one though.
-		 */
-		if (!(port->ip_flags & LOWAT_WRITTEN) &&
-			((cons_ptr - prod_ptr) & PROD_CONS_MASK)
-				<= port->ip_tx_lowat
-					* (int)sizeof(struct ring_entry)) {
-			port->ip_flags |= LOWAT_WRITTEN;
-			entry->ring_sc[0] |= IOC4_TXCB_INT_WHEN_DONE;
-		}
-
-		/* Go on to next entry */
-		prod_ptr += sizeof(struct ring_entry);
-		prod_ptr &= PROD_CONS_MASK;
-	}
-
-	/* If we sent something, start DMA if necessary */
-	if (total > 0 && !(port->ip_sscr & IOC4_SSCR_DMA_EN)) {
-		port->ip_sscr |= IOC4_SSCR_DMA_EN;
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-
-	/* Store the new producer pointer.  If tx is disabled, we stuff the
-	 * data into the ring buffer, but we don't actually start tx.
-	 */
-	if (!uart_tx_stopped(port->ip_port)) {
-		writel(prod_ptr, &port->ip_serial_regs->stpir);
-
-		/* If we are now transmitting, enable tx_mt interrupt so we
-		 * can disable DMA if necessary when the tx finishes.
-		 */
-		if (total > 0)
-			enable_intrs(port, hooks->intr_tx_mt);
-	}
-	port->ip_tx_prod = prod_ptr;
-	return total;
-}
-
-/**
- * disable_intrs - disable interrupts
- * @port: port to enable
- * @mask: mask to use
- */
-static void disable_intrs(struct ioc4_port *port, uint32_t mask)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	if (port->ip_ienb & mask) {
-		write_ireg(port->ip_ioc4_soft, mask, IOC4_W_IEC,
-					IOC4_SIO_INTR_TYPE);
-		port->ip_ienb &= ~mask;
-	}
-
-	if (!port->ip_ienb)
-		write_ireg(port->ip_ioc4_soft, hooks->intr_dma_error,
-				IOC4_W_IEC, IOC4_OTHER_INTR_TYPE);
-}
-
-/**
- * set_notification - Modify event notification
- * @port: port to use
- * @mask: events mask
- * @set_on: set ?
- */
-static int set_notification(struct ioc4_port *port, int mask, int set_on)
-{
-	struct hooks *hooks = port->ip_hooks;
-	uint32_t intrbits, sscrbits;
-
-	BUG_ON(!mask);
-
-	intrbits = sscrbits = 0;
-
-	if (mask & N_DATA_READY)
-		intrbits |= (hooks->intr_rx_timer | hooks->intr_rx_high);
-	if (mask & N_OUTPUT_LOWAT)
-		intrbits |= hooks->intr_tx_explicit;
-	if (mask & N_DDCD) {
-		intrbits |= hooks->intr_delta_dcd;
-		sscrbits |= IOC4_SSCR_RX_RING_DCD;
-	}
-	if (mask & N_DCTS)
-		intrbits |= hooks->intr_delta_cts;
-
-	if (set_on) {
-		enable_intrs(port, intrbits);
-		port->ip_notify |= mask;
-		port->ip_sscr |= sscrbits;
-	} else {
-		disable_intrs(port, intrbits);
-		port->ip_notify &= ~mask;
-		port->ip_sscr &= ~sscrbits;
-	}
-
-	/* We require DMA if either DATA_READY or DDCD notification is
-	 * currently requested. If neither of these is requested and
-	 * there is currently no tx in progress, DMA may be disabled.
-	 */
-	if (port->ip_notify & (N_DATA_READY | N_DDCD))
-		port->ip_sscr |= IOC4_SSCR_DMA_EN;
-	else if (!(port->ip_ienb & hooks->intr_tx_mt))
-		port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	return 0;
-}
-
-/**
- * set_mcr - set the master control reg
- * @the_port: port to use
- * @mask1: mcr mask
- * @mask2: shadow mask
- */
-static inline int set_mcr(struct uart_port *the_port,
-		int mask1, int mask2)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	uint32_t shadow;
-	int spiniter = 0;
-	char mcr;
-
-	if (!port)
-		return -1;
-
-	/* Pause the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr | IOC4_SSCR_DMA_PAUSE,
-			&port->ip_serial_regs->sscr);
-		while ((readl(&port->ip_serial_regs->sscr)
-					& IOC4_SSCR_PAUSE_STATE) == 0) {
-			spiniter++;
-			if (spiniter > MAXITER)
-				return -1;
-		}
-	}
-	shadow = readl(&port->ip_serial_regs->shadow);
-	mcr = (shadow & 0xff000000) >> 24;
-
-	/* Set new value */
-	mcr |= mask1;
-	shadow |= mask2;
-
-	writeb(mcr, &port->ip_uart_regs->i4u_mcr);
-	writel(shadow, &port->ip_serial_regs->shadow);
-
-	/* Re-enable the DMA interface if necessary */
-	if (port->ip_sscr & IOC4_SSCR_DMA_EN) {
-		writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-	}
-	return 0;
-}
-
-/**
- * ioc4_set_proto - set the protocol for the port
- * @port: port to use
- * @proto: protocol to use
- */
-static int ioc4_set_proto(struct ioc4_port *port, int proto)
-{
-	struct hooks *hooks = port->ip_hooks;
-
-	switch (proto) {
-	case PROTO_RS232:
-		/* Clear the appropriate GIO pin */
-		writel(0, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));
-		break;
-
-	case PROTO_RS422:
-		/* Set the appropriate GIO pin */
-		writel(1, (&port->ip_mem->gppr[hooks->rs422_select_pin].raw));
-		break;
-
-	default:
-		return 1;
-	}
-	return 0;
-}
-
-/**
- * transmit_chars - upper level write, called with ip_lock
- * @the_port: port to write
- */
-static void transmit_chars(struct uart_port *the_port)
-{
-	int xmit_count, tail, head;
-	int result;
-	char *start;
-	struct tty_struct *tty;
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	struct uart_state *state;
-
-	if (!the_port)
-		return;
-	if (!port)
-		return;
-
-	state = the_port->state;
-	tty = state->port.tty;
-
-	if (uart_circ_empty(&state->xmit) || uart_tx_stopped(the_port)) {
-		/* Nothing to do or hw stopped */
-		set_notification(port, N_ALL_OUTPUT, 0);
-		return;
-	}
-
-	head = state->xmit.head;
-	tail = state->xmit.tail;
-	start = (char *)&state->xmit.buf[tail];
-
-	/* write out all the data or until the end of the buffer */
-	xmit_count = (head < tail) ? (UART_XMIT_SIZE - tail) : (head - tail);
-	if (xmit_count > 0) {
-		result = do_write(port, start, xmit_count);
-		if (result > 0) {
-			/* booking */
-			xmit_count -= result;
-			the_port->icount.tx += result;
-			/* advance the pointers */
-			tail += result;
-			tail &= UART_XMIT_SIZE - 1;
-			state->xmit.tail = tail;
-			start = (char *)&state->xmit.buf[tail];
-		}
-	}
-	if (uart_circ_chars_pending(&state->xmit) < WAKEUP_CHARS)
-		uart_write_wakeup(the_port);
-
-	if (uart_circ_empty(&state->xmit)) {
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-	} else {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-	}
-}
-
-/**
- * ioc4_change_speed - change the speed of the port
- * @the_port: port to change
- * @new_termios: new termios settings
- * @old_termios: old termios settings
- */
-static void
-ioc4_change_speed(struct uart_port *the_port,
-		  struct ktermios *new_termios, struct ktermios *old_termios)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	int baud, bits;
-	unsigned cflag, iflag;
-	int new_parity = 0, new_parity_enable = 0, new_stop = 0, new_data = 8;
-	struct uart_state *state = the_port->state;
-
-	cflag = new_termios->c_cflag;
-	iflag = new_termios->c_iflag;
-
-	switch (cflag & CSIZE) {
-	case CS5:
-		new_data = 5;
-		bits = 7;
-		break;
-	case CS6:
-		new_data = 6;
-		bits = 8;
-		break;
-	case CS7:
-		new_data = 7;
-		bits = 9;
-		break;
-	case CS8:
-		new_data = 8;
-		bits = 10;
-		break;
-	default:
-		/* cuz we always need a default ... */
-		new_data = 5;
-		bits = 7;
-		break;
-	}
-	if (cflag & CSTOPB) {
-		bits++;
-		new_stop = 1;
-	}
-	if (cflag & PARENB) {
-		bits++;
-		new_parity_enable = 1;
-		if (cflag & PARODD)
-			new_parity = 1;
-	}
-	baud = uart_get_baud_rate(the_port, new_termios, old_termios,
-				MIN_BAUD_SUPPORTED, MAX_BAUD_SUPPORTED);
-	DPRINT_CONFIG(("%s: returned baud %d\n", __func__, baud));
-
-	/* default is 9600 */
-	if (!baud)
-		baud = 9600;
-
-	if (!the_port->fifosize)
-		the_port->fifosize = IOC4_FIFO_CHARS;
-	the_port->timeout = ((the_port->fifosize * HZ * bits) / (baud / 10));
-	the_port->timeout += HZ / 50;	/* Add .02 seconds of slop */
-
-	the_port->ignore_status_mask = N_ALL_INPUT;
-
-	state->port.low_latency = 1;
-
-	if (iflag & IGNPAR)
-		the_port->ignore_status_mask &= ~(N_PARITY_ERROR
-						| N_FRAMING_ERROR);
-	if (iflag & IGNBRK) {
-		the_port->ignore_status_mask &= ~N_BREAK;
-		if (iflag & IGNPAR)
-			the_port->ignore_status_mask &= ~N_OVERRUN_ERROR;
-	}
-	if (!(cflag & CREAD)) {
-		/* ignore everything */
-		the_port->ignore_status_mask &= ~N_DATA_READY;
-	}
-
-	if (cflag & CRTSCTS) {
-		port->ip_sscr |= IOC4_SSCR_HFC_EN;
-	}
-	else {
-		port->ip_sscr &= ~IOC4_SSCR_HFC_EN;
-	}
-	writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-
-	/* Set the configuration and proper notification call */
-	DPRINT_CONFIG(("%s : port 0x%p cflag 0%o "
-		"config_port(baud %d data %d stop %d p enable %d parity %d),"
-		" notification 0x%x\n",
-	     __func__, (void *)port, cflag, baud, new_data, new_stop,
-	     new_parity_enable, new_parity, the_port->ignore_status_mask));
-
-	if ((config_port(port, baud,		/* baud */
-			 new_data,		/* byte size */
-			 new_stop,		/* stop bits */
-			 new_parity_enable,	/* set parity */
-			 new_parity)) >= 0) {	/* parity 1==odd */
-		set_notification(port, the_port->ignore_status_mask, 1);
-	}
-}
-
-/**
- * ic4_startup_local - Start up the serial port - returns >= 0 if no errors
- * @the_port: Port to operate on
- */
-static inline int ic4_startup_local(struct uart_port *the_port)
-{
-	struct ioc4_port *port;
-	struct uart_state *state;
-
-	if (!the_port)
-		return -1;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port)
-		return -1;
-
-	state = the_port->state;
-
-	local_open(port);
-
-	/* set the protocol - mapbase has the port type */
-	ioc4_set_proto(port, the_port->mapbase);
-
-	/* set the speed of the serial port */
-	ioc4_change_speed(the_port, &state->port.tty->termios,
-			  (struct ktermios *)0);
-
-	return 0;
-}
-
-/*
- * ioc4_cb_output_lowat - called when the output low water mark is hit
- * @the_port: port to output
- */
-static void ioc4_cb_output_lowat(struct uart_port *the_port)
-{
-	unsigned long pflags;
-
-	/* ip_lock is set on the call here */
-	if (the_port) {
-		spin_lock_irqsave(&the_port->lock, pflags);
-		transmit_chars(the_port);
-		spin_unlock_irqrestore(&the_port->lock, pflags);
-	}
-}
-
-/**
- * handle_intr - service any interrupts for the given port - 2nd level
- *			called via sd_intr
- * @arg: handler arg
- * @sio_ir: ioc4regs
- */
-static void handle_intr(void *arg, uint32_t sio_ir)
-{
-	struct ioc4_port *port = (struct ioc4_port *)arg;
-	struct hooks *hooks = port->ip_hooks;
-	unsigned int rx_high_rd_aborted = 0;
-	unsigned long flags;
-	struct uart_port *the_port;
-	int loop_counter;
-
-	/* Possible race condition here: The tx_mt interrupt bit may be
-	 * cleared without the intervention of the interrupt handler,
-	 * e.g. by a write.  If the top level interrupt handler reads a
-	 * tx_mt, then some other processor does a write, starting up
-	 * output, then we come in here, see the tx_mt and stop DMA, the
-	 * output started by the other processor will hang.  Thus we can
-	 * only rely on tx_mt being legitimate if it is read while the
-	 * port lock is held.  Therefore this bit must be ignored in the
-	 * passed in interrupt mask which was read by the top level
-	 * interrupt handler since the port lock was not held at the time
-	 * it was read.  We can only rely on this bit being accurate if it
-	 * is read while the port lock is held.  So we'll clear it for now,
-	 * and reload it later once we have the port lock.
-	 */
-	sio_ir &= ~(hooks->intr_tx_mt);
-
-	spin_lock_irqsave(&port->ip_lock, flags);
-
-	loop_counter = MAXITER;	/* to avoid hangs */
-
-	do {
-		uint32_t shadow;
-
-		if ( loop_counter-- <= 0 ) {
-			printk(KERN_WARNING "IOC4 serial: "
-					"possible hang condition/"
-					"port stuck on interrupt.\n");
-			break;
-		}
-
-		/* Handle a DCD change */
-		if (sio_ir & hooks->intr_delta_dcd) {
-			/* ACK the interrupt */
-			writel(hooks->intr_delta_dcd,
-				&port->ip_mem->sio_ir.raw);
-
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DDCD)
-					&& (shadow & IOC4_SHADOW_DCD)
-					&& (port->ip_port)) {
-				the_port = port->ip_port;
-				the_port->icount.dcd = 1;
-				wake_up_interruptible
-					    (&the_port->state->port.delta_msr_wait);
-			} else if ((port->ip_notify & N_DDCD)
-					&& !(shadow & IOC4_SHADOW_DCD)) {
-				/* Flag delta DCD/no DCD */
-				port->ip_flags |= DCD_ON;
-			}
-		}
-
-		/* Handle a CTS change */
-		if (sio_ir & hooks->intr_delta_cts) {
-			/* ACK the interrupt */
-			writel(hooks->intr_delta_cts,
-					&port->ip_mem->sio_ir.raw);
-
-			shadow = readl(&port->ip_serial_regs->shadow);
-
-			if ((port->ip_notify & N_DCTS)
-					&& (port->ip_port)) {
-				the_port = port->ip_port;
-				the_port->icount.cts =
-					(shadow & IOC4_SHADOW_CTS) ? 1 : 0;
-				wake_up_interruptible
-					(&the_port->state->port.delta_msr_wait);
-			}
-		}
-
-		/* rx timeout interrupt.  Must be some data available.  Put this
-		 * before the check for rx_high since servicing this condition
-		 * may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_rx_timer) {
-			/* ACK the interrupt */
-			writel(hooks->intr_rx_timer,
-				&port->ip_mem->sio_ir.raw);
-
-			if ((port->ip_notify & N_DATA_READY)
-					&& (port->ip_port)) {
-				/* ip_lock is set on call here */
-				receive_chars(port->ip_port);
-			}
-		}
-
-		/* rx high interrupt. Must be after rx_timer.  */
-		else if (sio_ir & hooks->intr_rx_high) {
-			/* Data available, notify upper layer */
-			if ((port->ip_notify & N_DATA_READY)
-						&& port->ip_port) {
-				/* ip_lock is set on call here */
-				receive_chars(port->ip_port);
-			}
-
-			/* We can't ACK this interrupt.  If receive_chars didn't
-			 * cause the condition to clear, we'll have to disable
-			 * the interrupt until the data is drained.
-			 * If the read was aborted, don't disable the interrupt
-			 * as this may cause us to hang indefinitely.  An
-			 * aborted read generally means that this interrupt
-			 * hasn't been delivered to the cpu yet anyway, even
-			 * though we see it as asserted when we read the sio_ir.
-			 */
-			if ((sio_ir = PENDING(port)) & hooks->intr_rx_high) {
-				if ((port->ip_flags & READ_ABORTED) == 0) {
-					port->ip_ienb &= ~hooks->intr_rx_high;
-					port->ip_flags |= INPUT_HIGH;
-				} else {
-					rx_high_rd_aborted++;
-				}
-			}
-		}
-
-		/* We got a low water interrupt: notify upper layer to
-		 * send more data.  Must come before tx_mt since servicing
-		 * this condition may cause that condition to clear.
-		 */
-		if (sio_ir & hooks->intr_tx_explicit) {
-			port->ip_flags &= ~LOWAT_WRITTEN;
-
-			/* ACK the interrupt */
-			writel(hooks->intr_tx_explicit,
-					&port->ip_mem->sio_ir.raw);
-
-			if (port->ip_notify & N_OUTPUT_LOWAT)
-				ioc4_cb_output_lowat(port->ip_port);
-		}
-
-		/* Handle tx_mt.  Must come after tx_explicit.  */
-		else if (sio_ir & hooks->intr_tx_mt) {
-			/* If we are expecting a lowat notification
-			 * and we get to this point it probably means that for
-			 * some reason the tx_explicit didn't work as expected
-			 * (that can legitimately happen if the output buffer is
-			 * filled up in just the right way).
-			 * So send the notification now.
-			 */
-			if (port->ip_notify & N_OUTPUT_LOWAT) {
-				ioc4_cb_output_lowat(port->ip_port);
-
-				/* We need to reload the sio_ir since the lowat
-				 * call may have caused another write to occur,
-				 * clearing the tx_mt condition.
-				 */
-				sio_ir = PENDING(port);
-			}
-
-			/* If the tx_mt condition still persists even after the
-			 * lowat call, we've got some work to do.
-			 */
-			if (sio_ir & hooks->intr_tx_mt) {
-
-				/* If we are not currently expecting DMA input,
-				 * and the transmitter has just gone idle,
-				 * there is no longer any reason for DMA, so
-				 * disable it.
-				 */
-				if (!(port->ip_notify
-						& (N_DATA_READY | N_DDCD))) {
-					BUG_ON(!(port->ip_sscr
-							& IOC4_SSCR_DMA_EN));
-					port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-					writel(port->ip_sscr,
-					   &port->ip_serial_regs->sscr);
-				}
-
-				/* Prevent infinite tx_mt interrupt */
-				port->ip_ienb &= ~hooks->intr_tx_mt;
-			}
-		}
-		sio_ir = PENDING(port);
-
-		/* if the read was aborted and only hooks->intr_rx_high,
-		 * clear hooks->intr_rx_high, so we do not loop forever.
-		 */
-
-		if (rx_high_rd_aborted && (sio_ir == hooks->intr_rx_high)) {
-			sio_ir &= ~hooks->intr_rx_high;
-		}
-	} while (sio_ir & hooks->intr_all);
-
-	spin_unlock_irqrestore(&port->ip_lock, flags);
-
-	/* Re-enable interrupts before returning from interrupt handler.
-	 * Getting interrupted here is okay.  It'll just v() our semaphore, and
-	 * we'll come through the loop again.
-	 */
-
-	write_ireg(port->ip_ioc4_soft, port->ip_ienb, IOC4_W_IES,
-							IOC4_SIO_INTR_TYPE);
-}
-
-/*
- * ioc4_cb_post_ncs - called for some basic errors
- * @port: port to use
- * @ncs: event
- */
-static void ioc4_cb_post_ncs(struct uart_port *the_port, int ncs)
-{
-	struct uart_icount *icount;
-
-	icount = &the_port->icount;
-
-	if (ncs & NCS_BREAK)
-		icount->brk++;
-	if (ncs & NCS_FRAMING)
-		icount->frame++;
-	if (ncs & NCS_OVERRUN)
-		icount->overrun++;
-	if (ncs & NCS_PARITY)
-		icount->parity++;
-}
-
-/**
- * do_read - Read in bytes from the port.  Return the number of bytes
- *			actually read.
- * @the_port: port to use
- * @buf: place to put the stuff we read
- * @len: how big 'buf' is
- */
-
-static inline int do_read(struct uart_port *the_port, unsigned char *buf,
-				int len)
-{
-	int prod_ptr, cons_ptr, total;
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	struct ring *inring;
-	struct ring_entry *entry;
-	struct hooks *hooks;
-	int byte_num;
-	char *sc;
-	int loop_counter;
-
-	BUG_ON(!(len >= 0));
-	BUG_ON(!port);
-	hooks = port->ip_hooks;
-
-	/* There is a nasty timing issue in the IOC4. When the rx_timer
-	 * expires or the rx_high condition arises, we take an interrupt.
-	 * At some point while servicing the interrupt, we read bytes from
-	 * the ring buffer and re-arm the rx_timer.  However the rx_timer is
-	 * not started until the first byte is received *after* it is armed,
-	 * and any bytes pending in the rx construction buffers are not drained
-	 * to memory until either there are 4 bytes available or the rx_timer
-	 * expires.  This leads to a potential situation where data is left
-	 * in the construction buffers forever - 1 to 3 bytes were received
-	 * after the interrupt was generated but before the rx_timer was
-	 * re-armed. At that point as long as no subsequent bytes are received
-	 * the timer will never be started and the bytes will remain in the
-	 * construction buffer forever.  The solution is to execute a DRAIN
-	 * command after rearming the timer.  This way any bytes received before
-	 * the DRAIN will be drained to memory, and any bytes received after
-	 * the DRAIN will start the TIMER and be drained when it expires.
-	 * Luckily, this only needs to be done when the DMA buffer is empty
-	 * since there is no requirement that this function return all
-	 * available data as long as it returns some.
-	 */
-	/* Re-arm the timer */
-	writel(port->ip_rx_cons | IOC4_SRCIR_ARM, &port->ip_serial_regs->srcir);
-
-	prod_ptr = readl(&port->ip_serial_regs->srpir) & PROD_CONS_MASK;
-	cons_ptr = port->ip_rx_cons;
-
-	if (prod_ptr == cons_ptr) {
-		int reset_dma = 0;
-
-		/* Input buffer appears empty, do a flush. */
-
-		/* DMA must be enabled for this to work. */
-		if (!(port->ip_sscr & IOC4_SSCR_DMA_EN)) {
-			port->ip_sscr |= IOC4_SSCR_DMA_EN;
-			reset_dma = 1;
-		}
-
-		/* Potential race condition: we must reload the srpir after
-		 * issuing the drain command, otherwise we could think the rx
-		 * buffer is empty, then take a very long interrupt, and when
-		 * we come back it's full and we wait forever for the drain to
-		 * complete.
-		 */
-		writel(port->ip_sscr | IOC4_SSCR_RX_DRAIN,
-				&port->ip_serial_regs->sscr);
-		prod_ptr = readl(&port->ip_serial_regs->srpir)
-				& PROD_CONS_MASK;
-
-		/* We must not wait for the DRAIN to complete unless there are
-		 * at least 8 bytes (2 ring entries) available to receive the
-		 * data otherwise the DRAIN will never complete and we'll
-		 * deadlock here.
-		 * In fact, to make things easier, I'll just ignore the flush if
-		 * there is any data at all now available.
-		 */
-		if (prod_ptr == cons_ptr) {
-			loop_counter = 0;
-			while (readl(&port->ip_serial_regs->sscr) &
-						IOC4_SSCR_RX_DRAIN) {
-				loop_counter++;
-				if (loop_counter > MAXITER)
-					return -1;
-			}
-
-			/* SIGH. We have to reload the prod_ptr *again* since
-			 * the drain may have caused it to change
-			 */
-			prod_ptr = readl(&port->ip_serial_regs->srpir)
-							& PROD_CONS_MASK;
-		}
-		if (reset_dma) {
-			port->ip_sscr &= ~IOC4_SSCR_DMA_EN;
-			writel(port->ip_sscr, &port->ip_serial_regs->sscr);
-		}
-	}
-	inring = port->ip_inring;
-	port->ip_flags &= ~READ_ABORTED;
-
-	total = 0;
-	loop_counter = 0xfffff;	/* to avoid hangs */
-
-	/* Grab bytes from the hardware */
-	while ((prod_ptr != cons_ptr) && (len > 0)) {
-		entry = (struct ring_entry *)((caddr_t)inring + cons_ptr);
-
-		if ( loop_counter-- <= 0 ) {
-			printk(KERN_WARNING "IOC4 serial: "
-					"possible hang condition/"
-					"port stuck on read.\n");
-			break;
-		}
-
-		/* According to the producer pointer, this ring entry
-		 * must contain some data.  But if the PIO happened faster
-		 * than the DMA, the data may not be available yet, so let's
-		 * wait until it arrives.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			/* Indicate the read is aborted so we don't disable
-			 * the interrupt thinking that the consumer is
-			 * congested.
-			 */
-			port->ip_flags |= READ_ABORTED;
-			len = 0;
-			break;
-		}
-
-		/* Load the bytes/status out of the ring entry */
-		for (byte_num = 0; byte_num < 4 && len > 0; byte_num++) {
-			sc = &(entry->ring_sc[byte_num]);
-
-			/* Check for change in modem state or overrun */
-			if ((*sc & IOC4_RXSB_MODEM_VALID)
-						&& (port->ip_notify & N_DDCD)) {
-				/* Notify upper layer if DCD dropped */
-
-				if ((port->ip_flags & DCD_ON)
-						&& !(*sc & IOC4_RXSB_DCD)) {
-
-					/* If we have already copied some data,
-					 * return it.  We'll pick up the carrier
-					 * drop on the next pass.  That way we
-					 * don't throw away the data that has
-					 * already been copied back to
-					 * the caller's buffer.
-					 */
-					if (total > 0) {
-						len = 0;
-						break;
-					}
-					port->ip_flags &= ~DCD_ON;
-
-					/* Turn off this notification so the
-					 * carrier drop protocol won't see it
-					 * again when it does a read.
-					 */
-					*sc &= ~IOC4_RXSB_MODEM_VALID;
-
-					/* To keep things consistent, we need
-					 * to update the consumer pointer so
-					 * the next reader won't come in and
-					 * try to read the same ring entries
-					 * again. This must be done here before
-					 * the dcd change.
-					 */
-
-					if ((entry->ring_allsc & RING_ANY_VALID)
-									== 0) {
-						cons_ptr += (int)sizeof
-							(struct ring_entry);
-						cons_ptr &= PROD_CONS_MASK;
-					}
-					writel(cons_ptr,
-						&port->ip_serial_regs->srcir);
-					port->ip_rx_cons = cons_ptr;
-
-					/* Notify upper layer of carrier drop */
-					if ((port->ip_notify & N_DDCD)
-						   && port->ip_port) {
-						the_port->icount.dcd = 0;
-						wake_up_interruptible
-						    (&the_port->state->
-							port.delta_msr_wait);
-					}
-
-					/* If we had any data to return, we
-					 * would have returned it above.
-					 */
-					return 0;
-				}
-			}
-			if (*sc & IOC4_RXSB_MODEM_VALID) {
-				/* Notify that an input overrun occurred */
-				if ((*sc & IOC4_RXSB_OVERRUN)
-				    && (port->ip_notify & N_OVERRUN_ERROR)) {
-					ioc4_cb_post_ncs(the_port, NCS_OVERRUN);
-				}
-				/* Don't look at this byte again */
-				*sc &= ~IOC4_RXSB_MODEM_VALID;
-			}
-
-			/* Check for valid data or RX errors */
-			if ((*sc & IOC4_RXSB_DATA_VALID) &&
-					((*sc & (IOC4_RXSB_PAR_ERR
-							| IOC4_RXSB_FRAME_ERR
-							| IOC4_RXSB_BREAK))
-					&& (port->ip_notify & (N_PARITY_ERROR
-							| N_FRAMING_ERROR
-							| N_BREAK)))) {
-				/* There is an error condition on the next byte.
-				 * If we have already transferred some bytes,
-				 * we'll stop here. Otherwise if this is the
-				 * first byte to be read, we'll just transfer
-				 * it alone after notifying the
-				 * upper layer of its status.
-				 */
-				if (total > 0) {
-					len = 0;
-					break;
-				} else {
-					if ((*sc & IOC4_RXSB_PAR_ERR) &&
-					   (port->ip_notify & N_PARITY_ERROR)) {
-						ioc4_cb_post_ncs(the_port,
-								NCS_PARITY);
-					}
-					if ((*sc & IOC4_RXSB_FRAME_ERR) &&
-					   (port->ip_notify & N_FRAMING_ERROR)){
-						ioc4_cb_post_ncs(the_port,
-								NCS_FRAMING);
-					}
-					if ((*sc & IOC4_RXSB_BREAK)
-					    && (port->ip_notify & N_BREAK)) {
-							ioc4_cb_post_ncs
-								    (the_port,
-								     NCS_BREAK);
-					}
-					len = 1;
-				}
-			}
-			if (*sc & IOC4_RXSB_DATA_VALID) {
-				*sc &= ~IOC4_RXSB_DATA_VALID;
-				*buf = entry->ring_data[byte_num];
-				buf++;
-				len--;
-				total++;
-			}
-		}
-
-		/* If we used up this entry entirely, go on to the next one,
-		 * otherwise we must have run out of buffer space, so
-		 * leave the consumer pointer here for the next read in case
-		 * there are still unread bytes in this entry.
-		 */
-		if ((entry->ring_allsc & RING_ANY_VALID) == 0) {
-			cons_ptr += (int)sizeof(struct ring_entry);
-			cons_ptr &= PROD_CONS_MASK;
-		}
-	}
-
-	/* Update consumer pointer and re-arm rx timer interrupt */
-	writel(cons_ptr, &port->ip_serial_regs->srcir);
-	port->ip_rx_cons = cons_ptr;
-
-	/* If we have now dipped below the rx high water mark and we have
-	 * rx_high interrupt turned off, we can now turn it back on again.
-	 */
-	if ((port->ip_flags & INPUT_HIGH) && (((prod_ptr - cons_ptr)
-			& PROD_CONS_MASK) < ((port->ip_sscr &
-				IOC4_SSCR_RX_THRESHOLD)
-					<< IOC4_PROD_CONS_PTR_OFF))) {
-		port->ip_flags &= ~INPUT_HIGH;
-		enable_intrs(port, hooks->intr_rx_high);
-	}
-	return total;
-}
-
-/**
- * receive_chars - upper level read. Called with ip_lock.
- * @the_port: port to read from
- */
-static void receive_chars(struct uart_port *the_port)
-{
-	unsigned char ch[IOC4_MAX_CHARS];
-	int read_count, request_count = IOC4_MAX_CHARS;
-	struct uart_icount *icount;
-	struct uart_state *state = the_port->state;
-	unsigned long pflags;
-
-	/* Make sure all the pointers are "good" ones */
-	if (!state)
-		return;
-
-	spin_lock_irqsave(&the_port->lock, pflags);
-
-	request_count = tty_buffer_request_room(&state->port, IOC4_MAX_CHARS);
-
-	if (request_count > 0) {
-		icount = &the_port->icount;
-		read_count = do_read(the_port, ch, request_count);
-		if (read_count > 0) {
-			tty_insert_flip_string(&state->port, ch, read_count);
-			icount->rx += read_count;
-		}
-	}
-
-	spin_unlock_irqrestore(&the_port->lock, pflags);
-
-	tty_flip_buffer_push(&state->port);
-}
-
-/**
- * ic4_type - What type of console are we?
- * @port: Port to operate with (we ignore since we only have one port)
- *
- */
-static const char *ic4_type(struct uart_port *the_port)
-{
-	if (the_port->mapbase == PROTO_RS232)
-		return "SGI IOC4 Serial [rs232]";
-	else
-		return "SGI IOC4 Serial [rs422]";
-}
-
-/**
- * ic4_tx_empty - Is the transmitter empty?
- * @port: Port to operate on
- *
- */
-static unsigned int ic4_tx_empty(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	unsigned int ret = 0;
-
-	if (port_is_active(port, the_port)) {
-		if (readl(&port->ip_serial_regs->shadow) & IOC4_SHADOW_TEMT)
-			ret = TIOCSER_TEMT;
-	}
-	return ret;
-}
-
-/**
- * ic4_stop_tx - stop the transmitter
- * @port: Port to operate on
- *
- */
-static void ic4_stop_tx(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-
-	if (port_is_active(port, the_port))
-		set_notification(port, N_OUTPUT_LOWAT, 0);
-}
-
-/**
- * null_void_function -
- * @port: Port to operate on
- *
- */
-static void null_void_function(struct uart_port *the_port)
-{
-}
-
-/**
- * ic4_shutdown - shut down the port - free irq and disable
- * @port: Port to shut down
- *
- */
-static void ic4_shutdown(struct uart_port *the_port)
-{
-	unsigned long port_flags;
-	struct ioc4_port *port;
-	struct uart_state *state;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port)
-		return;
-
-	state = the_port->state;
-	port->ip_port = NULL;
-
-	wake_up_interruptible(&state->port.delta_msr_wait);
-
-	if (state->port.tty)
-		set_bit(TTY_IO_ERROR, &state->port.tty->flags);
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	set_notification(port, N_ALL, 0);
-	port->ip_flags = PORT_INACTIVE;
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic4_set_mctrl - set control lines (dtr, rts, etc)
- * @port: Port to operate on
- * @mctrl: Lines to set/unset
- *
- */
-static void ic4_set_mctrl(struct uart_port *the_port, unsigned int mctrl)
-{
-	unsigned char mcr = 0;
-	struct ioc4_port *port;
-
-	port = get_ioc4_port(the_port, 0);
-	if (!port_is_active(port, the_port))
-		return;
-
-	if (mctrl & TIOCM_RTS)
-		mcr |= UART_MCR_RTS;
-	if (mctrl & TIOCM_DTR)
-		mcr |= UART_MCR_DTR;
-	if (mctrl & TIOCM_OUT1)
-		mcr |= UART_MCR_OUT1;
-	if (mctrl & TIOCM_OUT2)
-		mcr |= UART_MCR_OUT2;
-	if (mctrl & TIOCM_LOOP)
-		mcr |= UART_MCR_LOOP;
-
-	set_mcr(the_port, mcr, IOC4_SHADOW_DTR);
-}
-
-/**
- * ic4_get_mctrl - get control line info
- * @port: port to operate on
- *
- */
-static unsigned int ic4_get_mctrl(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-	uint32_t shadow;
-	unsigned int ret = 0;
-
-	if (!port_is_active(port, the_port))
-		return 0;
-
-	shadow = readl(&port->ip_serial_regs->shadow);
-	if (shadow & IOC4_SHADOW_DCD)
-		ret |= TIOCM_CAR;
-	if (shadow & IOC4_SHADOW_DR)
-		ret |= TIOCM_DSR;
-	if (shadow & IOC4_SHADOW_CTS)
-		ret |= TIOCM_CTS;
-	return ret;
-}
-
-/**
- * ic4_start_tx - Start transmitter, flush any output
- * @port: Port to operate on
- *
- */
-static void ic4_start_tx(struct uart_port *the_port)
-{
-	struct ioc4_port *port = get_ioc4_port(the_port, 0);
-
-	if (port_is_active(port, the_port)) {
-		set_notification(port, N_OUTPUT_LOWAT, 1);
-		enable_intrs(port, port->ip_hooks->intr_tx_mt);
-	}
-}
-
-/**
- * ic4_break_ctl - handle breaks
- * @port: Port to operate on
- * @break_state: Break state
- *
- */
-static void ic4_break_ctl(struct uart_port *the_port, int break_state)
-{
-}
-
-/**
- * ic4_startup - Start up the serial port
- * @port: Port to operate on
- *
- */
-static int ic4_startup(struct uart_port *the_port)
-{
-	int retval;
-	struct ioc4_port *port;
-	struct ioc4_control *control;
-	struct uart_state *state;
-	unsigned long port_flags;
-
-	if (!the_port)
-		return -ENODEV;
-	port = get_ioc4_port(the_port, 1);
-	if (!port)
-		return -ENODEV;
-	state = the_port->state;
-
-	control = port->ip_control;
-	if (!control) {
-		port->ip_port = NULL;
-		return -ENODEV;
-	}
-
-	/* Start up the serial port */
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	retval = ic4_startup_local(the_port);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-	return retval;
-}
-
-/**
- * ic4_set_termios - set termios stuff
- * @port: port to operate on
- * @termios: New settings
- * @termios: Old
- *
- */
-static void
-ic4_set_termios(struct uart_port *the_port,
-		struct ktermios *termios, struct ktermios *old_termios)
-{
-	unsigned long port_flags;
-
-	spin_lock_irqsave(&the_port->lock, port_flags);
-	ioc4_change_speed(the_port, termios, old_termios);
-	spin_unlock_irqrestore(&the_port->lock, port_flags);
-}
-
-/**
- * ic4_request_port - allocate resources for port - no op....
- * @port: port to operate on
- *
- */
-static int ic4_request_port(struct uart_port *port)
-{
-	return 0;
-}
-
-/* Associate the uart functions above - given to serial core */
-
-static const struct uart_ops ioc4_ops = {
-	.tx_empty	= ic4_tx_empty,
-	.set_mctrl	= ic4_set_mctrl,
-	.get_mctrl	= ic4_get_mctrl,
-	.stop_tx	= ic4_stop_tx,
-	.start_tx	= ic4_start_tx,
-	.stop_rx	= null_void_function,
-	.break_ctl	= ic4_break_ctl,
-	.startup	= ic4_startup,
-	.shutdown	= ic4_shutdown,
-	.set_termios	= ic4_set_termios,
-	.type		= ic4_type,
-	.release_port	= null_void_function,
-	.request_port	= ic4_request_port,
-};
-
-/*
- * Boot-time initialization code
- */
-
-static struct uart_driver ioc4_uart_rs232 = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "ioc4_serial_rs232",
-	.dev_name	= DEVICE_NAME_RS232,
-	.major		= DEVICE_MAJOR,
-	.minor		= DEVICE_MINOR_RS232,
-	.nr		= IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS,
-};
-
-static struct uart_driver ioc4_uart_rs422 = {
-	.owner		= THIS_MODULE,
-	.driver_name	= "ioc4_serial_rs422",
-	.dev_name	= DEVICE_NAME_RS422,
-	.major		= DEVICE_MAJOR,
-	.minor		= DEVICE_MINOR_RS422,
-	.nr		= IOC4_NUM_CARDS * IOC4_NUM_SERIAL_PORTS,
-};
-
-
-/**
- * ioc4_serial_remove_one - detach function
- *
- * @idd: IOC4 master module data for this IOC4
- */
-
-static int ioc4_serial_remove_one(struct ioc4_driver_data *idd)
-{
-	int port_num, port_type;
-	struct ioc4_control *control;
-	struct uart_port *the_port;
-	struct ioc4_port *port;
-	struct ioc4_soft *soft;
-
-	/* If serial driver did not attach, don't try to detach */
-	control = idd->idd_serial_data;
-	if (!control)
-		return 0;
-
-	for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) {
-		for (port_type = UART_PORT_MIN;
-					port_type < UART_PORT_COUNT;
-					port_type++) {
-			the_port = &control->ic_port[port_num].icp_uart_port
-							[port_type];
-			if (the_port) {
-				switch (port_type) {
-				case UART_PORT_RS422:
-					uart_remove_one_port(&ioc4_uart_rs422,
-							the_port);
-					break;
-				default:
-				case UART_PORT_RS232:
-					uart_remove_one_port(&ioc4_uart_rs232,
-							the_port);
-					break;
-				}
-			}
-		}
-		port = control->ic_port[port_num].icp_port;
-		/* we allocate in pairs */
-		if (!(port_num & 1) && port) {
-			pci_free_consistent(port->ip_pdev,
-					TOTAL_RING_BUF_SIZE,
-					port->ip_cpu_ringbuf,
-					port->ip_dma_ringbuf);
-			kfree(port);
-		}
-	}
-	soft = control->ic_soft;
-	if (soft) {
-		free_irq(control->ic_irq, soft);
-		if (soft->is_ioc4_serial_addr) {
-			iounmap(soft->is_ioc4_serial_addr);
-			release_mem_region((unsigned long)
-			     soft->is_ioc4_serial_addr,
-				sizeof(struct ioc4_serial));
-		}
-		kfree(soft);
-	}
-	kfree(control);
-	idd->idd_serial_data = NULL;
-
-	return 0;
-}
-
-
-/**
- * ioc4_serial_core_attach_rs232 - register with serial core
- *		This is done during pci probing
- * @pdev: handle for this card
- */
-static inline int
-ioc4_serial_core_attach(struct pci_dev *pdev, int port_type)
-{
-	struct ioc4_port *port;
-	struct uart_port *the_port;
-	struct ioc4_driver_data *idd = pci_get_drvdata(pdev);
-	struct ioc4_control *control = idd->idd_serial_data;
-	int port_num;
-	int port_type_idx;
-	struct uart_driver *u_driver;
-
-
-	DPRINT_CONFIG(("%s: attach pdev 0x%p - control 0x%p\n",
-			__func__, pdev, (void *)control));
-
-	if (!control)
-		return -ENODEV;
-
-	port_type_idx = (port_type == PROTO_RS232) ? UART_PORT_RS232
-						: UART_PORT_RS422;
-
-	u_driver = (port_type == PROTO_RS232)	? &ioc4_uart_rs232
-						: &ioc4_uart_rs422;
-
-	/* once around for each port on this card */
-	for (port_num = 0; port_num < IOC4_NUM_SERIAL_PORTS; port_num++) {
-		the_port = &control->ic_port[port_num].icp_uart_port
-							[port_type_idx];
-		port = control->ic_port[port_num].icp_port;
-		port->ip_all_ports[port_type_idx] = the_port;
-
-		DPRINT_CONFIG(("%s: attach the_port 0x%p / port 0x%p : type %s\n",
-				__func__, (void *)the_port,
-				(void *)port,
-				port_type == PROTO_RS232 ? "rs232" : "rs422"));
-
-		/* membase, iobase and mapbase just need to be non-0 */
-		the_port->membase = (unsigned char __iomem *)1;
-		the_port->iobase = (pdev->bus->number << 16) |  port_num;
-		the_port->line = (Num_of_ioc4_cards << 2) | port_num;
-		the_port->mapbase = port_type;
-		the_port->type = PORT_16550A;
-		the_port->fifosize = IOC4_FIFO_CHARS;
-		the_port->ops = &ioc4_ops;
-		the_port->irq = control->ic_irq;
-		the_port->dev = &pdev->dev;
-		spin_lock_init(&the_port->lock);
-		if (uart_add_one_port(u_driver, the_port) < 0) {
-			printk(KERN_WARNING
-		           "%s: unable to add port %d bus %d\n",
-			       __func__, the_port->line, pdev->bus->number);
-		} else {
-			DPRINT_CONFIG(
-			    ("IOC4 serial port %d irq = %d, bus %d\n",
-			       the_port->line, the_port->irq, pdev->bus->number));
-		}
-	}
-	return 0;
-}
-
-/**
- * ioc4_serial_attach_one - register attach function
- *		called per card found from IOC4 master module.
- * @idd: Master module data for this IOC4
- */
-static int
-ioc4_serial_attach_one(struct ioc4_driver_data *idd)
-{
-	unsigned long tmp_addr1;
-	struct ioc4_serial __iomem *serial;
-	struct ioc4_soft *soft;
-	struct ioc4_control *control;
-	int ret = 0;
-
-
-	DPRINT_CONFIG(("%s (0x%p, 0x%p)\n", __func__, idd->idd_pdev,
-							idd->idd_pci_id));
-
-	/* PCI-RT does not bring out serial connections.
-	 * Do not attach to this particular IOC4.
-	 */
-	if (idd->idd_variant == IOC4_VARIANT_PCI_RT)
-		return 0;
-
-	/* request serial registers */
-	tmp_addr1 = idd->idd_bar0 + IOC4_SERIAL_OFFSET;
-
-	if (!request_mem_region(tmp_addr1, sizeof(struct ioc4_serial),
-					"sioc4_uart")) {
-		printk(KERN_WARNING
-			"ioc4 (%p): unable to get request region for "
-				"uart space\n", (void *)idd->idd_pdev);
-		ret = -ENODEV;
-		goto out1;
-	}
-	serial = ioremap(tmp_addr1, sizeof(struct ioc4_serial));
-	if (!serial) {
-		printk(KERN_WARNING
-			 "ioc4 (%p) : unable to remap ioc4 serial register\n",
-				(void *)idd->idd_pdev);
-		ret = -ENODEV;
-		goto out2;
-	}
-	DPRINT_CONFIG(("%s : mem 0x%p, serial 0x%p\n",
-				__func__, (void *)idd->idd_misc_regs,
-				(void *)serial));
-
-	/* Get memory for the new card */
-	control = kzalloc(sizeof(struct ioc4_control), GFP_KERNEL);
-
-	if (!control) {
-		printk(KERN_WARNING "ioc4_attach_one"
-		       ": unable to get memory for the IOC4\n");
-		ret = -ENOMEM;
-		goto out2;
-	}
-	idd->idd_serial_data = control;
-
-	/* Allocate the soft structure */
-	soft = kzalloc(sizeof(struct ioc4_soft), GFP_KERNEL);
-	if (!soft) {
-		printk(KERN_WARNING
-		       "ioc4 (%p): unable to get memory for the soft struct\n",
-		       (void *)idd->idd_pdev);
-		ret = -ENOMEM;
-		goto out3;
-	}
-
-	spin_lock_init(&soft->is_ir_lock);
-	soft->is_ioc4_misc_addr = idd->idd_misc_regs;
-	soft->is_ioc4_serial_addr = serial;
-
-	/* Init the IOC4 */
-	writel(0xf << IOC4_SIO_CR_CMD_PULSE_SHIFT,
-	       &idd->idd_misc_regs->sio_cr.raw);
-
-	/* Enable serial port mode select generic PIO pins as outputs */
-	writel(IOC4_GPCR_UART0_MODESEL | IOC4_GPCR_UART1_MODESEL
-		| IOC4_GPCR_UART2_MODESEL | IOC4_GPCR_UART3_MODESEL,
-		&idd->idd_misc_regs->gpcr_s.raw);
-
-	/* Clear and disable all serial interrupts */
-	write_ireg(soft, ~0, IOC4_W_IEC, IOC4_SIO_INTR_TYPE);
-	writel(~0, &idd->idd_misc_regs->sio_ir.raw);
-	write_ireg(soft, IOC4_OTHER_IR_SER_MEMERR, IOC4_W_IEC,
-		   IOC4_OTHER_INTR_TYPE);
-	writel(IOC4_OTHER_IR_SER_MEMERR, &idd->idd_misc_regs->other_ir.raw);
-	control->ic_soft = soft;
-
-	/* Hook up interrupt handler */
-	if (!request_irq(idd->idd_pdev->irq, ioc4_intr, IRQF_SHARED,
-				"sgi-ioc4serial", soft)) {
-		control->ic_irq = idd->idd_pdev->irq;
-	} else {
-		printk(KERN_WARNING
-		    "%s : request_irq fails for IRQ 0x%x\n ",
-			__func__, idd->idd_pdev->irq);
-	}
-	ret = ioc4_attach_local(idd);
-	if (ret)
-		goto out4;
-
-	/* register port with the serial core - 1 rs232, 1 rs422 */
-
-	ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS232);
-	if (ret)
-		goto out4;
-
-	ret = ioc4_serial_core_attach(idd->idd_pdev, PROTO_RS422);
-	if (ret)
-		goto out5;
-
-	Num_of_ioc4_cards++;
-
-	return ret;
-
-	/* error exits that give back resources */
-out5:
-	ioc4_serial_remove_one(idd);
-	return ret;
-out4:
-	kfree(soft);
-out3:
-	kfree(control);
-out2:
-	if (serial)
-		iounmap(serial);
-	release_mem_region(tmp_addr1, sizeof(struct ioc4_serial));
-out1:
-
-	return ret;
-}
-
-
-static struct ioc4_submodule ioc4_serial_submodule = {
-	.is_name = "IOC4_serial",
-	.is_owner = THIS_MODULE,
-	.is_probe = ioc4_serial_attach_one,
-	.is_remove = ioc4_serial_remove_one,
-};
-
-/**
- * ioc4_serial_init - module init
- */
-static int __init ioc4_serial_init(void)
-{
-	int ret;
-
-	/* register with serial core */
-	if ((ret = uart_register_driver(&ioc4_uart_rs232)) < 0) {
-		printk(KERN_WARNING
-			"%s: Couldn't register rs232 IOC4 serial driver\n",
-			__func__);
-		goto out;
-	}
-	if ((ret = uart_register_driver(&ioc4_uart_rs422)) < 0) {
-		printk(KERN_WARNING
-			"%s: Couldn't register rs422 IOC4 serial driver\n",
-			__func__);
-		goto out_uart_rs232;
-	}
-
-	/* register with IOC4 main module */
-	ret = ioc4_register_submodule(&ioc4_serial_submodule);
-	if (ret)
-		goto out_uart_rs422;
-	return 0;
-
-out_uart_rs422:
-	uart_unregister_driver(&ioc4_uart_rs422);
-out_uart_rs232:
-	uart_unregister_driver(&ioc4_uart_rs232);
-out:
-	return ret;
-}
-
-static void __exit ioc4_serial_exit(void)
-{
-	ioc4_unregister_submodule(&ioc4_serial_submodule);
-	uart_unregister_driver(&ioc4_uart_rs232);
-	uart_unregister_driver(&ioc4_uart_rs422);
-}
-
-late_initcall(ioc4_serial_init); /* Call only after tty init is done */
-module_exit(ioc4_serial_exit);
-
-MODULE_AUTHOR("Pat Gefre - Silicon Graphics Inc. (SGI) <[e-mail]>");
-MODULE_DESCRIPTION("Serial PCI driver module for SGI IOC4 Base-IO Card");
-MODULE_LICENSE("GPL");