forked from Minki/linux
a956f4ca3e
IRDA: smsc-ircc2 - remove home-grown DIM macro, use ARRAY_SIZE intead.
Also fix out-of-bound array access.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2387 lines
60 KiB
C
2387 lines
60 KiB
C
/*********************************************************************
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* $Id: smsc-ircc2.c,v 1.19.2.5 2002/10/27 11:34:26 dip Exp $
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*
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* Description: Driver for the SMC Infrared Communications Controller
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* Status: Experimental.
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* Author: Daniele Peri (peri@csai.unipa.it)
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* Created at:
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* Modified at:
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* Modified by:
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*
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* Copyright (c) 2002 Daniele Peri
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* All Rights Reserved.
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* Copyright (c) 2002 Jean Tourrilhes
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*
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*
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* Based on smc-ircc.c:
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*
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* Copyright (c) 2001 Stefani Seibold
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* Copyright (c) 1999-2001 Dag Brattli
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* Copyright (c) 1998-1999 Thomas Davis,
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*
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* and irport.c:
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*
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* Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/skbuff.h>
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#include <linux/netdevice.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/rtnetlink.h>
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#include <linux/serial_reg.h>
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#include <linux/dma-mapping.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/byteorder.h>
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#include <linux/spinlock.h>
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#include <linux/pm.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/irda.h>
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#include <net/irda/irda_device.h>
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#include "smsc-ircc2.h"
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#include "smsc-sio.h"
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MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
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MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
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MODULE_LICENSE("GPL");
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static int ircc_dma = 255;
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module_param(ircc_dma, int, 0);
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MODULE_PARM_DESC(ircc_dma, "DMA channel");
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static int ircc_irq = 255;
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module_param(ircc_irq, int, 0);
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MODULE_PARM_DESC(ircc_irq, "IRQ line");
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static int ircc_fir;
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module_param(ircc_fir, int, 0);
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MODULE_PARM_DESC(ircc_fir, "FIR Base Address");
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static int ircc_sir;
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module_param(ircc_sir, int, 0);
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MODULE_PARM_DESC(ircc_sir, "SIR Base Address");
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static int ircc_cfg;
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module_param(ircc_cfg, int, 0);
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MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");
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static int ircc_transceiver;
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module_param(ircc_transceiver, int, 0);
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MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");
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/* Types */
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struct smsc_transceiver {
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char *name;
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void (*set_for_speed)(int fir_base, u32 speed);
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int (*probe)(int fir_base);
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};
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typedef struct smsc_transceiver smsc_transceiver_t;
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#if 0
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struct smc_chip {
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char *name;
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u16 flags;
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u8 devid;
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u8 rev;
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};
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typedef struct smc_chip smc_chip_t;
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#endif
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struct smsc_chip {
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char *name;
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#if 0
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u8 type;
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#endif
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u16 flags;
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u8 devid;
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u8 rev;
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};
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typedef struct smsc_chip smsc_chip_t;
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struct smsc_chip_address {
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unsigned int cfg_base;
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unsigned int type;
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};
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typedef struct smsc_chip_address smsc_chip_address_t;
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/* Private data for each instance */
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struct smsc_ircc_cb {
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struct net_device *netdev; /* Yes! we are some kind of netdevice */
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struct net_device_stats stats;
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struct irlap_cb *irlap; /* The link layer we are binded to */
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chipio_t io; /* IrDA controller information */
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iobuff_t tx_buff; /* Transmit buffer */
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iobuff_t rx_buff; /* Receive buffer */
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dma_addr_t tx_buff_dma;
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dma_addr_t rx_buff_dma;
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struct qos_info qos; /* QoS capabilities for this device */
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spinlock_t lock; /* For serializing operations */
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__u32 new_speed;
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__u32 flags; /* Interface flags */
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int tx_buff_offsets[10]; /* Offsets between frames in tx_buff */
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int tx_len; /* Number of frames in tx_buff */
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int transceiver;
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struct pm_dev *pmdev;
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};
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/* Constants */
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static const char *driver_name = "smsc-ircc2";
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#define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
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#define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
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#define SMSC_IRCC2_C_NET_TIMEOUT 0
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#define SMSC_IRCC2_C_SIR_STOP 0
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/* Prototypes */
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static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
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static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
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static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
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static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
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static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
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static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
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static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self, int iobase);
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static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self, int iobase);
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static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
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static int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
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static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
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static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int iobase, int bofs);
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static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self, int iobase);
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static void smsc_ircc_change_speed(void *priv, u32 speed);
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static void smsc_ircc_set_sir_speed(void *priv, u32 speed);
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static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
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static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
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static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
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#if SMSC_IRCC2_C_SIR_STOP
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static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
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#endif
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static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
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static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
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static int smsc_ircc_net_open(struct net_device *dev);
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static int smsc_ircc_net_close(struct net_device *dev);
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static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
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#if SMSC_IRCC2_C_NET_TIMEOUT
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static void smsc_ircc_timeout(struct net_device *dev);
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#endif
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static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
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static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
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static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
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static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
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static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
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static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);
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/* Probing */
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static int __init smsc_ircc_look_for_chips(void);
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static const smsc_chip_t * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const smsc_chip_t *chip, char *type);
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static int __init smsc_superio_flat(const smsc_chip_t *chips, unsigned short cfg_base, char *type);
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static int __init smsc_superio_paged(const smsc_chip_t *chips, unsigned short cfg_base, char *type);
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static int __init smsc_superio_fdc(unsigned short cfg_base);
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static int __init smsc_superio_lpc(unsigned short cfg_base);
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/* Transceivers specific functions */
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static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
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static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
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static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
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static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
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static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
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static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);
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/* Power Management */
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static void smsc_ircc_suspend(struct smsc_ircc_cb *self);
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static void smsc_ircc_wakeup(struct smsc_ircc_cb *self);
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static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
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/* Transceivers for SMSC-ircc */
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static smsc_transceiver_t smsc_transceivers[] =
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{
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{ "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
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{ "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
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{ "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
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{ NULL, NULL }
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};
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#define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
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/* SMC SuperIO chipsets definitions */
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#define KEY55_1 0 /* SuperIO Configuration mode with Key <0x55> */
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#define KEY55_2 1 /* SuperIO Configuration mode with Key <0x55,0x55> */
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#define NoIRDA 2 /* SuperIO Chip has no IRDA Port */
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#define SIR 0 /* SuperIO Chip has only slow IRDA */
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#define FIR 4 /* SuperIO Chip has fast IRDA */
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#define SERx4 8 /* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */
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static smsc_chip_t __initdata fdc_chips_flat[] =
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{
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/* Base address 0x3f0 or 0x370 */
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{ "37C44", KEY55_1|NoIRDA, 0x00, 0x00 }, /* This chip cannot be detected */
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{ "37C665GT", KEY55_2|NoIRDA, 0x65, 0x01 },
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{ "37C665GT", KEY55_2|NoIRDA, 0x66, 0x01 },
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{ "37C669", KEY55_2|SIR|SERx4, 0x03, 0x02 },
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{ "37C669", KEY55_2|SIR|SERx4, 0x04, 0x02 }, /* ID? */
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{ "37C78", KEY55_2|NoIRDA, 0x78, 0x00 },
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{ "37N769", KEY55_1|FIR|SERx4, 0x28, 0x00 },
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{ "37N869", KEY55_1|FIR|SERx4, 0x29, 0x00 },
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{ NULL }
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};
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static smsc_chip_t __initdata fdc_chips_paged[] =
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{
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/* Base address 0x3f0 or 0x370 */
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{ "37B72X", KEY55_1|SIR|SERx4, 0x4c, 0x00 },
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{ "37B77X", KEY55_1|SIR|SERx4, 0x43, 0x00 },
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{ "37B78X", KEY55_1|SIR|SERx4, 0x44, 0x00 },
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{ "37B80X", KEY55_1|SIR|SERx4, 0x42, 0x00 },
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{ "37C67X", KEY55_1|FIR|SERx4, 0x40, 0x00 },
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{ "37C93X", KEY55_2|SIR|SERx4, 0x02, 0x01 },
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{ "37C93XAPM", KEY55_1|SIR|SERx4, 0x30, 0x01 },
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{ "37C93XFR", KEY55_2|FIR|SERx4, 0x03, 0x01 },
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{ "37M707", KEY55_1|SIR|SERx4, 0x42, 0x00 },
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{ "37M81X", KEY55_1|SIR|SERx4, 0x4d, 0x00 },
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{ "37N958FR", KEY55_1|FIR|SERx4, 0x09, 0x04 },
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{ "37N971", KEY55_1|FIR|SERx4, 0x0a, 0x00 },
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{ "37N972", KEY55_1|FIR|SERx4, 0x0b, 0x00 },
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{ NULL }
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};
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static smsc_chip_t __initdata lpc_chips_flat[] =
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{
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/* Base address 0x2E or 0x4E */
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{ "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
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{ "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
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{ NULL }
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};
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static smsc_chip_t __initdata lpc_chips_paged[] =
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{
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/* Base address 0x2E or 0x4E */
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{ "47B27X", KEY55_1|SIR|SERx4, 0x51, 0x00 },
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{ "47B37X", KEY55_1|SIR|SERx4, 0x52, 0x00 },
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{ "47M10X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
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{ "47M120", KEY55_1|NoIRDA|SERx4, 0x5c, 0x00 },
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{ "47M13X", KEY55_1|SIR|SERx4, 0x59, 0x00 },
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{ "47M14X", KEY55_1|SIR|SERx4, 0x5f, 0x00 },
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{ "47N252", KEY55_1|FIR|SERx4, 0x0e, 0x00 },
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{ "47S42X", KEY55_1|SIR|SERx4, 0x57, 0x00 },
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{ NULL }
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};
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#define SMSCSIO_TYPE_FDC 1
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#define SMSCSIO_TYPE_LPC 2
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#define SMSCSIO_TYPE_FLAT 4
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#define SMSCSIO_TYPE_PAGED 8
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static smsc_chip_address_t __initdata possible_addresses[] =
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{
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{ 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
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{ 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
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{ 0xe0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
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{ 0x2e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
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{ 0x4e, SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
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{ 0, 0 }
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};
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/* Globals */
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static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
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static unsigned short dev_count;
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static inline void register_bank(int iobase, int bank)
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{
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outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
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iobase + IRCC_MASTER);
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}
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/*******************************************************************************
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*
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*
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* SMSC-ircc stuff
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*
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*
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*******************************************************************************/
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/*
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* Function smsc_ircc_init ()
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*
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* Initialize chip. Just try to find out how many chips we are dealing with
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* and where they are
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*/
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static int __init smsc_ircc_init(void)
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{
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int ret = -ENODEV;
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IRDA_DEBUG(1, "%s\n", __FUNCTION__);
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dev_count = 0;
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if (ircc_fir > 0 && ircc_sir > 0) {
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IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
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IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);
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if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq) == 0)
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return 0;
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return -ENODEV;
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}
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/* try user provided configuration register base address */
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if (ircc_cfg > 0) {
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IRDA_MESSAGE(" Overriding configuration address 0x%04x\n",
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ircc_cfg);
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if (!smsc_superio_fdc(ircc_cfg))
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ret = 0;
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if (!smsc_superio_lpc(ircc_cfg))
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ret = 0;
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}
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if (smsc_ircc_look_for_chips() > 0)
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ret = 0;
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return ret;
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}
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/*
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* Function smsc_ircc_open (firbase, sirbase, dma, irq)
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*
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* Try to open driver instance
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*
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*/
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static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
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{
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struct smsc_ircc_cb *self;
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struct net_device *dev;
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int err;
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IRDA_DEBUG(1, "%s\n", __FUNCTION__);
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err = smsc_ircc_present(fir_base, sir_base);
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if (err)
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goto err_out;
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err = -ENOMEM;
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if (dev_count >= ARRAY_SIZE(dev_self)) {
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IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
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goto err_out1;
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}
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/*
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* Allocate new instance of the driver
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*/
|
|
dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
|
|
if (!dev) {
|
|
IRDA_WARNING("%s() can't allocate net device\n", __FUNCTION__);
|
|
goto err_out1;
|
|
}
|
|
|
|
SET_MODULE_OWNER(dev);
|
|
|
|
dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
|
|
#if SMSC_IRCC2_C_NET_TIMEOUT
|
|
dev->tx_timeout = smsc_ircc_timeout;
|
|
dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
|
|
#endif
|
|
dev->open = smsc_ircc_net_open;
|
|
dev->stop = smsc_ircc_net_close;
|
|
dev->do_ioctl = smsc_ircc_net_ioctl;
|
|
dev->get_stats = smsc_ircc_net_get_stats;
|
|
|
|
self = dev->priv;
|
|
self->netdev = dev;
|
|
|
|
/* Make ifconfig display some details */
|
|
dev->base_addr = self->io.fir_base = fir_base;
|
|
dev->irq = self->io.irq = irq;
|
|
|
|
/* Need to store self somewhere */
|
|
dev_self[dev_count++] = self;
|
|
spin_lock_init(&self->lock);
|
|
|
|
self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
|
|
self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;
|
|
|
|
self->rx_buff.head =
|
|
dma_alloc_coherent(NULL, self->rx_buff.truesize,
|
|
&self->rx_buff_dma, GFP_KERNEL);
|
|
if (self->rx_buff.head == NULL) {
|
|
IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
|
|
driver_name);
|
|
goto err_out2;
|
|
}
|
|
|
|
self->tx_buff.head =
|
|
dma_alloc_coherent(NULL, self->tx_buff.truesize,
|
|
&self->tx_buff_dma, GFP_KERNEL);
|
|
if (self->tx_buff.head == NULL) {
|
|
IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
|
|
driver_name);
|
|
goto err_out3;
|
|
}
|
|
|
|
memset(self->rx_buff.head, 0, self->rx_buff.truesize);
|
|
memset(self->tx_buff.head, 0, self->tx_buff.truesize);
|
|
|
|
self->rx_buff.in_frame = FALSE;
|
|
self->rx_buff.state = OUTSIDE_FRAME;
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
self->rx_buff.data = self->rx_buff.head;
|
|
|
|
smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
|
|
smsc_ircc_setup_qos(self);
|
|
smsc_ircc_init_chip(self);
|
|
|
|
if (ircc_transceiver > 0 &&
|
|
ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
|
|
self->transceiver = ircc_transceiver;
|
|
else
|
|
smsc_ircc_probe_transceiver(self);
|
|
|
|
err = register_netdev(self->netdev);
|
|
if (err) {
|
|
IRDA_ERROR("%s, Network device registration failed!\n",
|
|
driver_name);
|
|
goto err_out4;
|
|
}
|
|
|
|
self->pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, smsc_ircc_pmproc);
|
|
if (self->pmdev)
|
|
self->pmdev->data = self;
|
|
|
|
IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
|
|
|
|
return 0;
|
|
|
|
err_out4:
|
|
dma_free_coherent(NULL, self->tx_buff.truesize,
|
|
self->tx_buff.head, self->tx_buff_dma);
|
|
err_out3:
|
|
dma_free_coherent(NULL, self->rx_buff.truesize,
|
|
self->rx_buff.head, self->rx_buff_dma);
|
|
err_out2:
|
|
free_netdev(self->netdev);
|
|
dev_self[--dev_count] = NULL;
|
|
err_out1:
|
|
release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
|
|
release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_present(fir_base, sir_base)
|
|
*
|
|
* Check the smsc-ircc chip presence
|
|
*
|
|
*/
|
|
static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
|
|
{
|
|
unsigned char low, high, chip, config, dma, irq, version;
|
|
|
|
if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
|
|
driver_name)) {
|
|
IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
|
|
__FUNCTION__, fir_base);
|
|
goto out1;
|
|
}
|
|
|
|
if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
|
|
driver_name)) {
|
|
IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
|
|
__FUNCTION__, sir_base);
|
|
goto out2;
|
|
}
|
|
|
|
register_bank(fir_base, 3);
|
|
|
|
high = inb(fir_base + IRCC_ID_HIGH);
|
|
low = inb(fir_base + IRCC_ID_LOW);
|
|
chip = inb(fir_base + IRCC_CHIP_ID);
|
|
version = inb(fir_base + IRCC_VERSION);
|
|
config = inb(fir_base + IRCC_INTERFACE);
|
|
dma = config & IRCC_INTERFACE_DMA_MASK;
|
|
irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
|
|
|
|
if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
|
|
IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
|
|
__FUNCTION__, fir_base);
|
|
goto out3;
|
|
}
|
|
IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
|
|
"firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
|
|
chip & 0x0f, version, fir_base, sir_base, dma, irq);
|
|
|
|
return 0;
|
|
|
|
out3:
|
|
release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
|
|
out2:
|
|
release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
|
|
out1:
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
|
|
*
|
|
* Setup I/O
|
|
*
|
|
*/
|
|
static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
|
|
unsigned int fir_base, unsigned int sir_base,
|
|
u8 dma, u8 irq)
|
|
{
|
|
unsigned char config, chip_dma, chip_irq;
|
|
|
|
register_bank(fir_base, 3);
|
|
config = inb(fir_base + IRCC_INTERFACE);
|
|
chip_dma = config & IRCC_INTERFACE_DMA_MASK;
|
|
chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
|
|
|
|
self->io.fir_base = fir_base;
|
|
self->io.sir_base = sir_base;
|
|
self->io.fir_ext = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
|
|
self->io.sir_ext = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
|
|
self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
|
|
self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;
|
|
|
|
if (irq < 255) {
|
|
if (irq != chip_irq)
|
|
IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
|
|
driver_name, chip_irq, irq);
|
|
self->io.irq = irq;
|
|
} else
|
|
self->io.irq = chip_irq;
|
|
|
|
if (dma < 255) {
|
|
if (dma != chip_dma)
|
|
IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
|
|
driver_name, chip_dma, dma);
|
|
self->io.dma = dma;
|
|
} else
|
|
self->io.dma = chip_dma;
|
|
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_setup_qos(self)
|
|
*
|
|
* Setup qos
|
|
*
|
|
*/
|
|
static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
|
|
{
|
|
/* Initialize QoS for this device */
|
|
irda_init_max_qos_capabilies(&self->qos);
|
|
|
|
self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
|
|
IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8);
|
|
|
|
self->qos.min_turn_time.bits = SMSC_IRCC2_MIN_TURN_TIME;
|
|
self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
|
|
irda_qos_bits_to_value(&self->qos);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_init_chip(self)
|
|
*
|
|
* Init chip
|
|
*
|
|
*/
|
|
static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
|
|
{
|
|
int iobase, ir_mode, ctrl, fast;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
iobase = self->io.fir_base;
|
|
ir_mode = IRCC_CFGA_IRDA_SIR_A;
|
|
ctrl = 0;
|
|
fast = 0;
|
|
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
|
|
outb(0x00, iobase + IRCC_MASTER);
|
|
|
|
register_bank(iobase, 1);
|
|
outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | ir_mode),
|
|
iobase + IRCC_SCE_CFGA);
|
|
|
|
#ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
|
|
outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
|
|
iobase + IRCC_SCE_CFGB);
|
|
#else
|
|
outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
|
|
iobase + IRCC_SCE_CFGB);
|
|
#endif
|
|
(void) inb(iobase + IRCC_FIFO_THRESHOLD);
|
|
outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
|
|
|
|
register_bank(iobase, 4);
|
|
outb((inb(iobase + IRCC_CONTROL) & 0x30) | ctrl, iobase + IRCC_CONTROL);
|
|
|
|
register_bank(iobase, 0);
|
|
outb(fast, iobase + IRCC_LCR_A);
|
|
|
|
smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
|
|
|
|
/* Power on device */
|
|
outb(0x00, iobase + IRCC_MASTER);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_net_ioctl (dev, rq, cmd)
|
|
*
|
|
* Process IOCTL commands for this device
|
|
*
|
|
*/
|
|
static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
|
{
|
|
struct if_irda_req *irq = (struct if_irda_req *) rq;
|
|
struct smsc_ircc_cb *self;
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
|
|
self = dev->priv;
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
|
|
|
|
switch (cmd) {
|
|
case SIOCSBANDWIDTH: /* Set bandwidth */
|
|
if (!capable(CAP_NET_ADMIN))
|
|
ret = -EPERM;
|
|
else {
|
|
/* Make sure we are the only one touching
|
|
* self->io.speed and the hardware - Jean II */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
smsc_ircc_change_speed(self, irq->ifr_baudrate);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
}
|
|
break;
|
|
case SIOCSMEDIABUSY: /* Set media busy */
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
ret = -EPERM;
|
|
break;
|
|
}
|
|
|
|
irda_device_set_media_busy(self->netdev, TRUE);
|
|
break;
|
|
case SIOCGRECEIVING: /* Check if we are receiving right now */
|
|
irq->ifr_receiving = smsc_ircc_is_receiving(self);
|
|
break;
|
|
#if 0
|
|
case SIOCSDTRRTS:
|
|
if (!capable(CAP_NET_ADMIN)) {
|
|
ret = -EPERM;
|
|
break;
|
|
}
|
|
smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
|
|
break;
|
|
#endif
|
|
default:
|
|
ret = -EOPNOTSUPP;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) dev->priv;
|
|
|
|
return &self->stats;
|
|
}
|
|
|
|
#if SMSC_IRCC2_C_NET_TIMEOUT
|
|
/*
|
|
* Function smsc_ircc_timeout (struct net_device *dev)
|
|
*
|
|
* The networking timeout management.
|
|
*
|
|
*/
|
|
|
|
static void smsc_ircc_timeout(struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self;
|
|
unsigned long flags;
|
|
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
|
|
IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
|
|
dev->name, self->io.speed);
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
smsc_ircc_sir_start(self);
|
|
smsc_ircc_change_speed(self, self->io.speed);
|
|
dev->trans_start = jiffies;
|
|
netif_wake_queue(dev);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
|
|
*
|
|
* Transmits the current frame until FIFO is full, then
|
|
* waits until the next transmit interrupt, and continues until the
|
|
* frame is transmitted.
|
|
*/
|
|
int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self;
|
|
unsigned long flags;
|
|
int iobase;
|
|
s32 speed;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(dev != NULL, return 0;);
|
|
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.sir_base;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* Make sure test of self->io.speed & speed change are atomic */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* Check if we need to change the speed */
|
|
speed = irda_get_next_speed(skb);
|
|
if (speed != self->io.speed && speed != -1) {
|
|
/* Check for empty frame */
|
|
if (!skb->len) {
|
|
/*
|
|
* We send frames one by one in SIR mode (no
|
|
* pipelining), so at this point, if we were sending
|
|
* a previous frame, we just received the interrupt
|
|
* telling us it is finished (UART_IIR_THRI).
|
|
* Therefore, waiting for the transmitter to really
|
|
* finish draining the fifo won't take too long.
|
|
* And the interrupt handler is not expected to run.
|
|
* - Jean II */
|
|
smsc_ircc_sir_wait_hw_transmitter_finish(self);
|
|
smsc_ircc_change_speed(self, speed);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
self->new_speed = speed;
|
|
}
|
|
|
|
/* Init tx buffer */
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
|
|
/* Copy skb to tx_buff while wrapping, stuffing and making CRC */
|
|
self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
|
|
self->tx_buff.truesize);
|
|
|
|
self->stats.tx_bytes += self->tx_buff.len;
|
|
|
|
/* Turn on transmit finished interrupt. Will fire immediately! */
|
|
outb(UART_IER_THRI, iobase + UART_IER);
|
|
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_set_fir_speed (self, baud)
|
|
*
|
|
* Change the speed of the device
|
|
*
|
|
*/
|
|
static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
|
|
{
|
|
int fir_base, ir_mode, ctrl, fast;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
fir_base = self->io.fir_base;
|
|
|
|
self->io.speed = speed;
|
|
|
|
switch (speed) {
|
|
default:
|
|
case 576000:
|
|
ir_mode = IRCC_CFGA_IRDA_HDLC;
|
|
ctrl = IRCC_CRC;
|
|
fast = 0;
|
|
IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
|
|
break;
|
|
case 1152000:
|
|
ir_mode = IRCC_CFGA_IRDA_HDLC;
|
|
ctrl = IRCC_1152 | IRCC_CRC;
|
|
fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
|
|
IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
|
|
__FUNCTION__);
|
|
break;
|
|
case 4000000:
|
|
ir_mode = IRCC_CFGA_IRDA_4PPM;
|
|
ctrl = IRCC_CRC;
|
|
fast = IRCC_LCR_A_FAST;
|
|
IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
|
|
__FUNCTION__);
|
|
break;
|
|
}
|
|
#if 0
|
|
Now in tranceiver!
|
|
/* This causes an interrupt */
|
|
register_bank(fir_base, 0);
|
|
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
|
|
#endif
|
|
|
|
register_bank(fir_base, 1);
|
|
outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
|
|
|
|
register_bank(fir_base, 4);
|
|
outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_fir_start(self)
|
|
*
|
|
* Change the speed of the device
|
|
*
|
|
*/
|
|
static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
|
|
{
|
|
struct net_device *dev;
|
|
int fir_base;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
dev = self->netdev;
|
|
IRDA_ASSERT(dev != NULL, return;);
|
|
|
|
fir_base = self->io.fir_base;
|
|
|
|
/* Reset everything */
|
|
|
|
/* Install FIR transmit handler */
|
|
dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
|
|
|
|
/* Clear FIFO */
|
|
outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
|
|
|
|
/* Enable interrupt */
|
|
/*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
|
|
|
|
register_bank(fir_base, 1);
|
|
|
|
/* Select the TX/RX interface */
|
|
#ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
|
|
outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
|
|
fir_base + IRCC_SCE_CFGB);
|
|
#else
|
|
outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
|
|
fir_base + IRCC_SCE_CFGB);
|
|
#endif
|
|
(void) inb(fir_base + IRCC_FIFO_THRESHOLD);
|
|
|
|
/* Enable SCE interrupts */
|
|
outb(0, fir_base + IRCC_MASTER);
|
|
register_bank(fir_base, 0);
|
|
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
|
|
outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_fir_stop(self, baud)
|
|
*
|
|
* Change the speed of the device
|
|
*
|
|
*/
|
|
static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
|
|
{
|
|
int fir_base;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
fir_base = self->io.fir_base;
|
|
register_bank(fir_base, 0);
|
|
/*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
|
|
outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_change_speed(self, baud)
|
|
*
|
|
* Change the speed of the device
|
|
*
|
|
* This function *must* be called with spinlock held, because it may
|
|
* be called from the irq handler. - Jean II
|
|
*/
|
|
static void smsc_ircc_change_speed(void *priv, u32 speed)
|
|
{
|
|
struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) priv;
|
|
struct net_device *dev;
|
|
int iobase;
|
|
int last_speed_was_sir;
|
|
|
|
IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
dev = self->netdev;
|
|
iobase = self->io.fir_base;
|
|
|
|
last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;
|
|
|
|
#if 0
|
|
/* Temp Hack */
|
|
speed= 1152000;
|
|
self->io.speed = speed;
|
|
last_speed_was_sir = 0;
|
|
smsc_ircc_fir_start(self);
|
|
#endif
|
|
|
|
if (self->io.speed == 0)
|
|
smsc_ircc_sir_start(self);
|
|
|
|
#if 0
|
|
if (!last_speed_was_sir) speed = self->io.speed;
|
|
#endif
|
|
|
|
if (self->io.speed != speed)
|
|
smsc_ircc_set_transceiver_for_speed(self, speed);
|
|
|
|
self->io.speed = speed;
|
|
|
|
if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
|
|
if (!last_speed_was_sir) {
|
|
smsc_ircc_fir_stop(self);
|
|
smsc_ircc_sir_start(self);
|
|
}
|
|
smsc_ircc_set_sir_speed(self, speed);
|
|
} else {
|
|
if (last_speed_was_sir) {
|
|
#if SMSC_IRCC2_C_SIR_STOP
|
|
smsc_ircc_sir_stop(self);
|
|
#endif
|
|
smsc_ircc_fir_start(self);
|
|
}
|
|
smsc_ircc_set_fir_speed(self, speed);
|
|
|
|
#if 0
|
|
self->tx_buff.len = 10;
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
|
|
smsc_ircc_dma_xmit(self, iobase, 4000);
|
|
#endif
|
|
/* Be ready for incoming frames */
|
|
smsc_ircc_dma_receive(self, iobase);
|
|
}
|
|
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_set_sir_speed (self, speed)
|
|
*
|
|
* Set speed of IrDA port to specified baudrate
|
|
*
|
|
*/
|
|
void smsc_ircc_set_sir_speed(void *priv, __u32 speed)
|
|
{
|
|
struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) priv;
|
|
int iobase;
|
|
int fcr; /* FIFO control reg */
|
|
int lcr; /* Line control reg */
|
|
int divisor;
|
|
|
|
IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __FUNCTION__, speed);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
iobase = self->io.sir_base;
|
|
|
|
/* Update accounting for new speed */
|
|
self->io.speed = speed;
|
|
|
|
/* Turn off interrupts */
|
|
outb(0, iobase + UART_IER);
|
|
|
|
divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
|
|
|
|
fcr = UART_FCR_ENABLE_FIFO;
|
|
|
|
/*
|
|
* Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
|
|
* almost 1,7 ms at 19200 bps. At speeds above that we can just forget
|
|
* about this timeout since it will always be fast enough.
|
|
*/
|
|
fcr |= self->io.speed < 38400 ?
|
|
UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
|
|
|
|
/* IrDA ports use 8N1 */
|
|
lcr = UART_LCR_WLEN8;
|
|
|
|
outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
|
|
outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
|
|
outb(divisor >> 8, iobase + UART_DLM);
|
|
outb(lcr, iobase + UART_LCR); /* Set 8N1 */
|
|
outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
|
|
|
|
/* Turn on interrups */
|
|
outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
|
|
|
|
IRDA_DEBUG(2, "%s() speed changed to: %d\n", __FUNCTION__, speed);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_hard_xmit_fir (skb, dev)
|
|
*
|
|
* Transmit the frame!
|
|
*
|
|
*/
|
|
static int smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self;
|
|
unsigned long flags;
|
|
s32 speed;
|
|
int iobase;
|
|
int mtt;
|
|
|
|
IRDA_ASSERT(dev != NULL, return 0;);
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
/* Make sure test of self->io.speed & speed change are atomic */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* Check if we need to change the speed after this frame */
|
|
speed = irda_get_next_speed(skb);
|
|
if (speed != self->io.speed && speed != -1) {
|
|
/* Check for empty frame */
|
|
if (!skb->len) {
|
|
/* Note : you should make sure that speed changes
|
|
* are not going to corrupt any outgoing frame.
|
|
* Look at nsc-ircc for the gory details - Jean II */
|
|
smsc_ircc_change_speed(self, speed);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
self->new_speed = speed;
|
|
}
|
|
|
|
memcpy(self->tx_buff.head, skb->data, skb->len);
|
|
|
|
self->tx_buff.len = skb->len;
|
|
self->tx_buff.data = self->tx_buff.head;
|
|
|
|
mtt = irda_get_mtt(skb);
|
|
if (mtt) {
|
|
int bofs;
|
|
|
|
/*
|
|
* Compute how many BOFs (STA or PA's) we need to waste the
|
|
* min turn time given the speed of the link.
|
|
*/
|
|
bofs = mtt * (self->io.speed / 1000) / 8000;
|
|
if (bofs > 4095)
|
|
bofs = 4095;
|
|
|
|
smsc_ircc_dma_xmit(self, iobase, bofs);
|
|
} else {
|
|
/* Transmit frame */
|
|
smsc_ircc_dma_xmit(self, iobase, 0);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
dev_kfree_skb(skb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_dma_xmit (self, iobase)
|
|
*
|
|
* Transmit data using DMA
|
|
*
|
|
*/
|
|
static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int iobase, int bofs)
|
|
{
|
|
u8 ctrl;
|
|
|
|
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
|
|
#if 1
|
|
/* Disable Rx */
|
|
register_bank(iobase, 0);
|
|
outb(0x00, iobase + IRCC_LCR_B);
|
|
#endif
|
|
register_bank(iobase, 1);
|
|
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
|
|
iobase + IRCC_SCE_CFGB);
|
|
|
|
self->io.direction = IO_XMIT;
|
|
|
|
/* Set BOF additional count for generating the min turn time */
|
|
register_bank(iobase, 4);
|
|
outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
|
|
ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
|
|
outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
|
|
|
|
/* Set max Tx frame size */
|
|
outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
|
|
outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
|
|
|
|
/*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
|
|
|
|
/* Enable burst mode chip Tx DMA */
|
|
register_bank(iobase, 1);
|
|
outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
|
|
IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
|
|
|
|
/* Setup DMA controller (must be done after enabling chip DMA) */
|
|
irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
|
|
DMA_TX_MODE);
|
|
|
|
/* Enable interrupt */
|
|
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
|
|
outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
|
|
|
|
/* Enable transmit */
|
|
outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_dma_xmit_complete (self)
|
|
*
|
|
* The transfer of a frame in finished. This function will only be called
|
|
* by the interrupt handler
|
|
*
|
|
*/
|
|
static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self, int iobase)
|
|
{
|
|
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
|
|
#if 0
|
|
/* Disable Tx */
|
|
register_bank(iobase, 0);
|
|
outb(0x00, iobase + IRCC_LCR_B);
|
|
#endif
|
|
register_bank(self->io.fir_base, 1);
|
|
outb(inb(self->io.fir_base + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
|
|
self->io.fir_base + IRCC_SCE_CFGB);
|
|
|
|
/* Check for underrun! */
|
|
register_bank(iobase, 0);
|
|
if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
|
|
self->stats.tx_errors++;
|
|
self->stats.tx_fifo_errors++;
|
|
|
|
/* Reset error condition */
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
|
|
outb(0x00, iobase + IRCC_MASTER);
|
|
} else {
|
|
self->stats.tx_packets++;
|
|
self->stats.tx_bytes += self->tx_buff.len;
|
|
}
|
|
|
|
/* Check if it's time to change the speed */
|
|
if (self->new_speed) {
|
|
smsc_ircc_change_speed(self, self->new_speed);
|
|
self->new_speed = 0;
|
|
}
|
|
|
|
netif_wake_queue(self->netdev);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_dma_receive(self)
|
|
*
|
|
* Get ready for receiving a frame. The device will initiate a DMA
|
|
* if it starts to receive a frame.
|
|
*
|
|
*/
|
|
static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self, int iobase)
|
|
{
|
|
#if 0
|
|
/* Turn off chip DMA */
|
|
register_bank(iobase, 1);
|
|
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
|
|
iobase + IRCC_SCE_CFGB);
|
|
#endif
|
|
|
|
/* Disable Tx */
|
|
register_bank(iobase, 0);
|
|
outb(0x00, iobase + IRCC_LCR_B);
|
|
|
|
/* Turn off chip DMA */
|
|
register_bank(iobase, 1);
|
|
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
|
|
iobase + IRCC_SCE_CFGB);
|
|
|
|
self->io.direction = IO_RECV;
|
|
self->rx_buff.data = self->rx_buff.head;
|
|
|
|
/* Set max Rx frame size */
|
|
register_bank(iobase, 4);
|
|
outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
|
|
outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
|
|
|
|
/* Setup DMA controller */
|
|
irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
|
|
DMA_RX_MODE);
|
|
|
|
/* Enable burst mode chip Rx DMA */
|
|
register_bank(iobase, 1);
|
|
outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
|
|
IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
|
|
|
|
/* Enable interrupt */
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
|
|
outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
|
|
|
|
/* Enable receiver */
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
|
|
iobase + IRCC_LCR_B);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_dma_receive_complete(self, iobase)
|
|
*
|
|
* Finished with receiving frames
|
|
*
|
|
*/
|
|
static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self, int iobase)
|
|
{
|
|
struct sk_buff *skb;
|
|
int len, msgcnt, lsr;
|
|
|
|
register_bank(iobase, 0);
|
|
|
|
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
|
|
#if 0
|
|
/* Disable Rx */
|
|
register_bank(iobase, 0);
|
|
outb(0x00, iobase + IRCC_LCR_B);
|
|
#endif
|
|
register_bank(iobase, 0);
|
|
outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
|
|
lsr= inb(iobase + IRCC_LSR);
|
|
msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
|
|
|
|
IRDA_DEBUG(2, "%s: dma count = %d\n", __FUNCTION__,
|
|
get_dma_residue(self->io.dma));
|
|
|
|
len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
|
|
|
|
/* Look for errors */
|
|
if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
|
|
self->stats.rx_errors++;
|
|
if (lsr & IRCC_LSR_FRAME_ERROR)
|
|
self->stats.rx_frame_errors++;
|
|
if (lsr & IRCC_LSR_CRC_ERROR)
|
|
self->stats.rx_crc_errors++;
|
|
if (lsr & IRCC_LSR_SIZE_ERROR)
|
|
self->stats.rx_length_errors++;
|
|
if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
|
|
self->stats.rx_length_errors++;
|
|
return;
|
|
}
|
|
|
|
/* Remove CRC */
|
|
len -= self->io.speed < 4000000 ? 2 : 4;
|
|
|
|
if (len < 2 || len > 2050) {
|
|
IRDA_WARNING("%s(), bogus len=%d\n", __FUNCTION__, len);
|
|
return;
|
|
}
|
|
IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
|
|
|
|
skb = dev_alloc_skb(len + 1);
|
|
if (!skb) {
|
|
IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
|
|
__FUNCTION__);
|
|
return;
|
|
}
|
|
/* Make sure IP header gets aligned */
|
|
skb_reserve(skb, 1);
|
|
|
|
memcpy(skb_put(skb, len), self->rx_buff.data, len);
|
|
self->stats.rx_packets++;
|
|
self->stats.rx_bytes += len;
|
|
|
|
skb->dev = self->netdev;
|
|
skb->mac.raw = skb->data;
|
|
skb->protocol = htons(ETH_P_IRDA);
|
|
netif_rx(skb);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_sir_receive (self)
|
|
*
|
|
* Receive one frame from the infrared port
|
|
*
|
|
*/
|
|
static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
|
|
{
|
|
int boguscount = 0;
|
|
int iobase;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
iobase = self->io.sir_base;
|
|
|
|
/*
|
|
* Receive all characters in Rx FIFO, unwrap and unstuff them.
|
|
* async_unwrap_char will deliver all found frames
|
|
*/
|
|
do {
|
|
async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
|
|
inb(iobase + UART_RX));
|
|
|
|
/* Make sure we don't stay here to long */
|
|
if (boguscount++ > 32) {
|
|
IRDA_DEBUG(2, "%s(), breaking!\n", __FUNCTION__);
|
|
break;
|
|
}
|
|
} while (inb(iobase + UART_LSR) & UART_LSR_DR);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_interrupt (irq, dev_id, regs)
|
|
*
|
|
* An interrupt from the chip has arrived. Time to do some work
|
|
*
|
|
*/
|
|
static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
struct net_device *dev = (struct net_device *) dev_id;
|
|
struct smsc_ircc_cb *self;
|
|
int iobase, iir, lcra, lsr;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
|
|
if (dev == NULL) {
|
|
printk(KERN_WARNING "%s: irq %d for unknown device.\n",
|
|
driver_name, irq);
|
|
goto irq_ret;
|
|
}
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
IRDA_ASSERT(self != NULL, return IRQ_NONE;);
|
|
|
|
/* Serialise the interrupt handler in various CPUs, stop Tx path */
|
|
spin_lock(&self->lock);
|
|
|
|
/* Check if we should use the SIR interrupt handler */
|
|
if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
|
|
ret = smsc_ircc_interrupt_sir(dev);
|
|
goto irq_ret_unlock;
|
|
}
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
register_bank(iobase, 0);
|
|
iir = inb(iobase + IRCC_IIR);
|
|
if (iir == 0)
|
|
goto irq_ret_unlock;
|
|
ret = IRQ_HANDLED;
|
|
|
|
/* Disable interrupts */
|
|
outb(0, iobase + IRCC_IER);
|
|
lcra = inb(iobase + IRCC_LCR_A);
|
|
lsr = inb(iobase + IRCC_LSR);
|
|
|
|
IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __FUNCTION__, iir);
|
|
|
|
if (iir & IRCC_IIR_EOM) {
|
|
if (self->io.direction == IO_RECV)
|
|
smsc_ircc_dma_receive_complete(self, iobase);
|
|
else
|
|
smsc_ircc_dma_xmit_complete(self, iobase);
|
|
|
|
smsc_ircc_dma_receive(self, iobase);
|
|
}
|
|
|
|
if (iir & IRCC_IIR_ACTIVE_FRAME) {
|
|
/*printk(KERN_WARNING "%s(): Active Frame\n", __FUNCTION__);*/
|
|
}
|
|
|
|
/* Enable interrupts again */
|
|
|
|
register_bank(iobase, 0);
|
|
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
|
|
|
|
irq_ret_unlock:
|
|
spin_unlock(&self->lock);
|
|
irq_ret:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function irport_interrupt_sir (irq, dev_id, regs)
|
|
*
|
|
* Interrupt handler for SIR modes
|
|
*/
|
|
static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self = dev->priv;
|
|
int boguscount = 0;
|
|
int iobase;
|
|
int iir, lsr;
|
|
|
|
/* Already locked comming here in smsc_ircc_interrupt() */
|
|
/*spin_lock(&self->lock);*/
|
|
|
|
iobase = self->io.sir_base;
|
|
|
|
iir = inb(iobase + UART_IIR) & UART_IIR_ID;
|
|
if (iir == 0)
|
|
return IRQ_NONE;
|
|
while (iir) {
|
|
/* Clear interrupt */
|
|
lsr = inb(iobase + UART_LSR);
|
|
|
|
IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
|
|
__FUNCTION__, iir, lsr, iobase);
|
|
|
|
switch (iir) {
|
|
case UART_IIR_RLSI:
|
|
IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
|
|
break;
|
|
case UART_IIR_RDI:
|
|
/* Receive interrupt */
|
|
smsc_ircc_sir_receive(self);
|
|
break;
|
|
case UART_IIR_THRI:
|
|
if (lsr & UART_LSR_THRE)
|
|
/* Transmitter ready for data */
|
|
smsc_ircc_sir_write_wakeup(self);
|
|
break;
|
|
default:
|
|
IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
|
|
__FUNCTION__, iir);
|
|
break;
|
|
}
|
|
|
|
/* Make sure we don't stay here to long */
|
|
if (boguscount++ > 100)
|
|
break;
|
|
|
|
iir = inb(iobase + UART_IIR) & UART_IIR_ID;
|
|
}
|
|
/*spin_unlock(&self->lock);*/
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
#if 0 /* unused */
|
|
/*
|
|
* Function ircc_is_receiving (self)
|
|
*
|
|
* Return TRUE is we are currently receiving a frame
|
|
*
|
|
*/
|
|
static int ircc_is_receiving(struct smsc_ircc_cb *self)
|
|
{
|
|
int status = FALSE;
|
|
/* int iobase; */
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(self != NULL, return FALSE;);
|
|
|
|
IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
|
|
get_dma_residue(self->io.dma));
|
|
|
|
status = (self->rx_buff.state != OUTSIDE_FRAME);
|
|
|
|
return status;
|
|
}
|
|
#endif /* unused */
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_net_open (dev)
|
|
*
|
|
* Start the device
|
|
*
|
|
*/
|
|
static int smsc_ircc_net_open(struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self;
|
|
int iobase;
|
|
char hwname[16];
|
|
unsigned long flags;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
|
|
(void *) dev)) {
|
|
IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
|
|
__FUNCTION__, self->io.irq);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
/*smsc_ircc_sir_start(self);*/
|
|
self->io.speed = 0;
|
|
smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
/* Give self a hardware name */
|
|
/* It would be cool to offer the chip revision here - Jean II */
|
|
sprintf(hwname, "SMSC @ 0x%03x", self->io.fir_base);
|
|
|
|
/*
|
|
* Open new IrLAP layer instance, now that everything should be
|
|
* initialized properly
|
|
*/
|
|
self->irlap = irlap_open(dev, &self->qos, hwname);
|
|
|
|
/*
|
|
* Always allocate the DMA channel after the IRQ,
|
|
* and clean up on failure.
|
|
*/
|
|
if (request_dma(self->io.dma, dev->name)) {
|
|
smsc_ircc_net_close(dev);
|
|
|
|
IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
|
|
__FUNCTION__, self->io.dma);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
netif_start_queue(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_net_close (dev)
|
|
*
|
|
* Stop the device
|
|
*
|
|
*/
|
|
static int smsc_ircc_net_close(struct net_device *dev)
|
|
{
|
|
struct smsc_ircc_cb *self;
|
|
int iobase;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(dev != NULL, return -1;);
|
|
self = (struct smsc_ircc_cb *) dev->priv;
|
|
IRDA_ASSERT(self != NULL, return 0;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
/* Stop device */
|
|
netif_stop_queue(dev);
|
|
|
|
/* Stop and remove instance of IrLAP */
|
|
if (self->irlap)
|
|
irlap_close(self->irlap);
|
|
self->irlap = NULL;
|
|
|
|
free_irq(self->io.irq, dev);
|
|
disable_dma(self->io.dma);
|
|
free_dma(self->io.dma);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void smsc_ircc_suspend(struct smsc_ircc_cb *self)
|
|
{
|
|
IRDA_MESSAGE("%s, Suspending\n", driver_name);
|
|
|
|
if (!self->io.suspended) {
|
|
smsc_ircc_net_close(self->netdev);
|
|
self->io.suspended = 1;
|
|
}
|
|
}
|
|
|
|
static void smsc_ircc_wakeup(struct smsc_ircc_cb *self)
|
|
{
|
|
if (!self->io.suspended)
|
|
return;
|
|
|
|
/* The code was doing a "cli()" here, but this can't be right.
|
|
* If you need protection, do it in net_open with a spinlock
|
|
* or give a good reason. - Jean II */
|
|
|
|
smsc_ircc_net_open(self->netdev);
|
|
|
|
IRDA_MESSAGE("%s, Waking up\n", driver_name);
|
|
}
|
|
|
|
static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
|
|
{
|
|
struct smsc_ircc_cb *self = (struct smsc_ircc_cb*) dev->data;
|
|
if (self) {
|
|
switch (rqst) {
|
|
case PM_SUSPEND:
|
|
smsc_ircc_suspend(self);
|
|
break;
|
|
case PM_RESUME:
|
|
smsc_ircc_wakeup(self);
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_close (self)
|
|
*
|
|
* Close driver instance
|
|
*
|
|
*/
|
|
static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
|
|
{
|
|
int iobase;
|
|
unsigned long flags;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
iobase = self->io.fir_base;
|
|
|
|
if (self->pmdev)
|
|
pm_unregister(self->pmdev);
|
|
|
|
/* Remove netdevice */
|
|
unregister_netdev(self->netdev);
|
|
|
|
/* Make sure the irq handler is not exectuting */
|
|
spin_lock_irqsave(&self->lock, flags);
|
|
|
|
/* Stop interrupts */
|
|
register_bank(iobase, 0);
|
|
outb(0, iobase + IRCC_IER);
|
|
outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
|
|
outb(0x00, iobase + IRCC_MASTER);
|
|
#if 0
|
|
/* Reset to SIR mode */
|
|
register_bank(iobase, 1);
|
|
outb(IRCC_CFGA_IRDA_SIR_A|IRCC_CFGA_TX_POLARITY, iobase + IRCC_SCE_CFGA);
|
|
outb(IRCC_CFGB_IR, iobase + IRCC_SCE_CFGB);
|
|
#endif
|
|
spin_unlock_irqrestore(&self->lock, flags);
|
|
|
|
/* Release the PORTS that this driver is using */
|
|
IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
|
|
self->io.fir_base);
|
|
|
|
release_region(self->io.fir_base, self->io.fir_ext);
|
|
|
|
IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
|
|
self->io.sir_base);
|
|
|
|
release_region(self->io.sir_base, self->io.sir_ext);
|
|
|
|
if (self->tx_buff.head)
|
|
dma_free_coherent(NULL, self->tx_buff.truesize,
|
|
self->tx_buff.head, self->tx_buff_dma);
|
|
|
|
if (self->rx_buff.head)
|
|
dma_free_coherent(NULL, self->rx_buff.truesize,
|
|
self->rx_buff.head, self->rx_buff_dma);
|
|
|
|
free_netdev(self->netdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit smsc_ircc_cleanup(void)
|
|
{
|
|
int i;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
if (dev_self[i])
|
|
smsc_ircc_close(dev_self[i]);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Start SIR operations
|
|
*
|
|
* This function *must* be called with spinlock held, because it may
|
|
* be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
|
|
*/
|
|
void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
|
|
{
|
|
struct net_device *dev;
|
|
int fir_base, sir_base;
|
|
|
|
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
dev = self->netdev;
|
|
IRDA_ASSERT(dev != NULL, return;);
|
|
dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
|
|
|
|
fir_base = self->io.fir_base;
|
|
sir_base = self->io.sir_base;
|
|
|
|
/* Reset everything */
|
|
outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
|
|
|
|
#if SMSC_IRCC2_C_SIR_STOP
|
|
/*smsc_ircc_sir_stop(self);*/
|
|
#endif
|
|
|
|
register_bank(fir_base, 1);
|
|
outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
|
|
|
|
/* Initialize UART */
|
|
outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
|
|
outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
|
|
|
|
/* Turn on interrups */
|
|
outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
|
|
|
|
IRDA_DEBUG(3, "%s() - exit\n", __FUNCTION__);
|
|
|
|
outb(0x00, fir_base + IRCC_MASTER);
|
|
}
|
|
|
|
#if SMSC_IRCC2_C_SIR_STOP
|
|
void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
|
|
{
|
|
int iobase;
|
|
|
|
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
|
|
iobase = self->io.sir_base;
|
|
|
|
/* Reset UART */
|
|
outb(0, iobase + UART_MCR);
|
|
|
|
/* Turn off interrupts */
|
|
outb(0, iobase + UART_IER);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Function smsc_sir_write_wakeup (self)
|
|
*
|
|
* Called by the SIR interrupt handler when there's room for more data.
|
|
* If we have more packets to send, we send them here.
|
|
*
|
|
*/
|
|
static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
|
|
{
|
|
int actual = 0;
|
|
int iobase;
|
|
int fcr;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_DEBUG(4, "%s\n", __FUNCTION__);
|
|
|
|
iobase = self->io.sir_base;
|
|
|
|
/* Finished with frame? */
|
|
if (self->tx_buff.len > 0) {
|
|
/* Write data left in transmit buffer */
|
|
actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
|
|
self->tx_buff.data, self->tx_buff.len);
|
|
self->tx_buff.data += actual;
|
|
self->tx_buff.len -= actual;
|
|
} else {
|
|
|
|
/*if (self->tx_buff.len ==0) {*/
|
|
|
|
/*
|
|
* Now serial buffer is almost free & we can start
|
|
* transmission of another packet. But first we must check
|
|
* if we need to change the speed of the hardware
|
|
*/
|
|
if (self->new_speed) {
|
|
IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
|
|
__FUNCTION__, self->new_speed);
|
|
smsc_ircc_sir_wait_hw_transmitter_finish(self);
|
|
smsc_ircc_change_speed(self, self->new_speed);
|
|
self->new_speed = 0;
|
|
} else {
|
|
/* Tell network layer that we want more frames */
|
|
netif_wake_queue(self->netdev);
|
|
}
|
|
self->stats.tx_packets++;
|
|
|
|
if (self->io.speed <= 115200) {
|
|
/*
|
|
* Reset Rx FIFO to make sure that all reflected transmit data
|
|
* is discarded. This is needed for half duplex operation
|
|
*/
|
|
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
|
|
fcr |= self->io.speed < 38400 ?
|
|
UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
|
|
|
|
outb(fcr, iobase + UART_FCR);
|
|
|
|
/* Turn on receive interrupts */
|
|
outb(UART_IER_RDI, iobase + UART_IER);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
|
|
*
|
|
* Fill Tx FIFO with transmit data
|
|
*
|
|
*/
|
|
static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
|
|
{
|
|
int actual = 0;
|
|
|
|
/* Tx FIFO should be empty! */
|
|
if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
|
|
IRDA_WARNING("%s(), failed, fifo not empty!\n", __FUNCTION__);
|
|
return 0;
|
|
}
|
|
|
|
/* Fill FIFO with current frame */
|
|
while (fifo_size-- > 0 && actual < len) {
|
|
/* Transmit next byte */
|
|
outb(buf[actual], iobase + UART_TX);
|
|
actual++;
|
|
}
|
|
return actual;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_is_receiving (self)
|
|
*
|
|
* Returns true is we are currently receiving data
|
|
*
|
|
*/
|
|
static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
|
|
{
|
|
return (self->rx_buff.state != OUTSIDE_FRAME);
|
|
}
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_probe_transceiver(self)
|
|
*
|
|
* Tries to find the used Transceiver
|
|
*
|
|
*/
|
|
static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
|
|
{
|
|
unsigned int i;
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
for (i = 0; smsc_transceivers[i].name != NULL; i++)
|
|
if (smsc_transceivers[i].probe(self->io.fir_base)) {
|
|
IRDA_MESSAGE(" %s transceiver found\n",
|
|
smsc_transceivers[i].name);
|
|
self->transceiver= i + 1;
|
|
return;
|
|
}
|
|
|
|
IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
|
|
smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
|
|
|
|
self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
|
|
}
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_set_transceiver_for_speed(self, speed)
|
|
*
|
|
* Set the transceiver according to the speed
|
|
*
|
|
*/
|
|
static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
|
|
{
|
|
unsigned int trx;
|
|
|
|
trx = self->transceiver;
|
|
if (trx > 0)
|
|
smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_wait_hw_transmitter_finish ()
|
|
*
|
|
* Wait for the real end of HW transmission
|
|
*
|
|
* The UART is a strict FIFO, and we get called only when we have finished
|
|
* pushing data to the FIFO, so the maximum amount of time we must wait
|
|
* is only for the FIFO to drain out.
|
|
*
|
|
* We use a simple calibrated loop. We may need to adjust the loop
|
|
* delay (udelay) to balance I/O traffic and latency. And we also need to
|
|
* adjust the maximum timeout.
|
|
* It would probably be better to wait for the proper interrupt,
|
|
* but it doesn't seem to be available.
|
|
*
|
|
* We can't use jiffies or kernel timers because :
|
|
* 1) We are called from the interrupt handler, which disable softirqs,
|
|
* so jiffies won't be increased
|
|
* 2) Jiffies granularity is usually very coarse (10ms), and we don't
|
|
* want to wait that long to detect stuck hardware.
|
|
* Jean II
|
|
*/
|
|
|
|
static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
|
|
{
|
|
int iobase = self->io.sir_base;
|
|
int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
|
|
|
|
/* Calibrated busy loop */
|
|
while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
|
|
udelay(1);
|
|
|
|
if (count == 0)
|
|
IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__);
|
|
}
|
|
|
|
|
|
/* PROBING
|
|
*
|
|
*
|
|
*/
|
|
|
|
static int __init smsc_ircc_look_for_chips(void)
|
|
{
|
|
smsc_chip_address_t *address;
|
|
char *type;
|
|
unsigned int cfg_base, found;
|
|
|
|
found = 0;
|
|
address = possible_addresses;
|
|
|
|
while (address->cfg_base) {
|
|
cfg_base = address->cfg_base;
|
|
|
|
/*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __FUNCTION__, cfg_base, address->type);*/
|
|
|
|
if (address->type & SMSCSIO_TYPE_FDC) {
|
|
type = "FDC";
|
|
if (address->type & SMSCSIO_TYPE_FLAT)
|
|
if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
|
|
found++;
|
|
|
|
if (address->type & SMSCSIO_TYPE_PAGED)
|
|
if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
|
|
found++;
|
|
}
|
|
if (address->type & SMSCSIO_TYPE_LPC) {
|
|
type = "LPC";
|
|
if (address->type & SMSCSIO_TYPE_FLAT)
|
|
if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
|
|
found++;
|
|
|
|
if (address->type & SMSCSIO_TYPE_PAGED)
|
|
if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
|
|
found++;
|
|
}
|
|
address++;
|
|
}
|
|
return found;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_superio_flat (chip, base, type)
|
|
*
|
|
* Try to get configuration of a smc SuperIO chip with flat register model
|
|
*
|
|
*/
|
|
static int __init smsc_superio_flat(const smsc_chip_t *chips, unsigned short cfgbase, char *type)
|
|
{
|
|
unsigned short firbase, sirbase;
|
|
u8 mode, dma, irq;
|
|
int ret = -ENODEV;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
|
|
return ret;
|
|
|
|
outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
|
|
mode = inb(cfgbase + 1);
|
|
|
|
/*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __FUNCTION__, mode);*/
|
|
|
|
if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
|
|
IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
|
|
|
|
outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
|
|
sirbase = inb(cfgbase + 1) << 2;
|
|
|
|
/* FIR iobase */
|
|
outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
|
|
firbase = inb(cfgbase + 1) << 3;
|
|
|
|
/* DMA */
|
|
outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
|
|
dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
|
|
|
|
/* IRQ */
|
|
outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
|
|
irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
|
|
|
|
IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __FUNCTION__, firbase, sirbase, dma, irq, mode);
|
|
|
|
if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
|
|
ret = 0;
|
|
|
|
/* Exit configuration */
|
|
outb(SMSCSIO_CFGEXITKEY, cfgbase);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_superio_paged (chip, base, type)
|
|
*
|
|
* Try to get configuration of a smc SuperIO chip with paged register model
|
|
*
|
|
*/
|
|
static int __init smsc_superio_paged(const smsc_chip_t *chips, unsigned short cfg_base, char *type)
|
|
{
|
|
unsigned short fir_io, sir_io;
|
|
int ret = -ENODEV;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
|
|
return ret;
|
|
|
|
/* Select logical device (UART2) */
|
|
outb(0x07, cfg_base);
|
|
outb(0x05, cfg_base + 1);
|
|
|
|
/* SIR iobase */
|
|
outb(0x60, cfg_base);
|
|
sir_io = inb(cfg_base + 1) << 8;
|
|
outb(0x61, cfg_base);
|
|
sir_io |= inb(cfg_base + 1);
|
|
|
|
/* Read FIR base */
|
|
outb(0x62, cfg_base);
|
|
fir_io = inb(cfg_base + 1) << 8;
|
|
outb(0x63, cfg_base);
|
|
fir_io |= inb(cfg_base + 1);
|
|
outb(0x2b, cfg_base); /* ??? */
|
|
|
|
if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
|
|
ret = 0;
|
|
|
|
/* Exit configuration */
|
|
outb(SMSCSIO_CFGEXITKEY, cfg_base);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
|
|
{
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
outb(reg, cfg_base);
|
|
return inb(cfg_base) != reg ? -1 : 0;
|
|
}
|
|
|
|
static const smsc_chip_t * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const smsc_chip_t *chip, char *type)
|
|
{
|
|
u8 devid, xdevid, rev;
|
|
|
|
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
|
|
|
|
/* Leave configuration */
|
|
|
|
outb(SMSCSIO_CFGEXITKEY, cfg_base);
|
|
|
|
if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
|
|
return NULL;
|
|
|
|
outb(reg, cfg_base);
|
|
|
|
xdevid = inb(cfg_base + 1);
|
|
|
|
/* Enter configuration */
|
|
|
|
outb(SMSCSIO_CFGACCESSKEY, cfg_base);
|
|
|
|
#if 0
|
|
if (smsc_access(cfg_base,0x55)) /* send second key and check */
|
|
return NULL;
|
|
#endif
|
|
|
|
/* probe device ID */
|
|
|
|
if (smsc_access(cfg_base, reg))
|
|
return NULL;
|
|
|
|
devid = inb(cfg_base + 1);
|
|
|
|
if (devid == 0 || devid == 0xff) /* typical values for unused port */
|
|
return NULL;
|
|
|
|
/* probe revision ID */
|
|
|
|
if (smsc_access(cfg_base, reg + 1))
|
|
return NULL;
|
|
|
|
rev = inb(cfg_base + 1);
|
|
|
|
if (rev >= 128) /* i think this will make no sense */
|
|
return NULL;
|
|
|
|
if (devid == xdevid) /* protection against false positives */
|
|
return NULL;
|
|
|
|
/* Check for expected device ID; are there others? */
|
|
|
|
while (chip->devid != devid) {
|
|
|
|
chip++;
|
|
|
|
if (chip->name == NULL)
|
|
return NULL;
|
|
}
|
|
|
|
IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
|
|
devid, rev, cfg_base, type, chip->name);
|
|
|
|
if (chip->rev > rev) {
|
|
IRDA_MESSAGE("Revision higher than expected\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (chip->flags & NoIRDA)
|
|
IRDA_MESSAGE("chipset does not support IRDA\n");
|
|
|
|
return chip;
|
|
}
|
|
|
|
static int __init smsc_superio_fdc(unsigned short cfg_base)
|
|
{
|
|
int ret = -1;
|
|
|
|
if (!request_region(cfg_base, 2, driver_name)) {
|
|
IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
|
|
__FUNCTION__, cfg_base);
|
|
} else {
|
|
if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
|
|
!smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
|
|
ret = 0;
|
|
|
|
release_region(cfg_base, 2);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __init smsc_superio_lpc(unsigned short cfg_base)
|
|
{
|
|
int ret = -1;
|
|
|
|
if (!request_region(cfg_base, 2, driver_name)) {
|
|
IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
|
|
__FUNCTION__, cfg_base);
|
|
} else {
|
|
if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
|
|
!smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
|
|
ret = 0;
|
|
|
|
release_region(cfg_base, 2);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/************************************************
|
|
*
|
|
* Transceivers specific functions
|
|
*
|
|
************************************************/
|
|
|
|
|
|
/*
|
|
* Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
|
|
*
|
|
* Program transceiver through smsc-ircc ATC circuitry
|
|
*
|
|
*/
|
|
|
|
static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
|
|
{
|
|
unsigned long jiffies_now, jiffies_timeout;
|
|
u8 val;
|
|
|
|
jiffies_now = jiffies;
|
|
jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
|
|
|
|
/* ATC */
|
|
register_bank(fir_base, 4);
|
|
outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
|
|
fir_base + IRCC_ATC);
|
|
|
|
while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
|
|
!time_after(jiffies, jiffies_timeout))
|
|
/* empty */;
|
|
|
|
if (val)
|
|
IRDA_WARNING("%s(): ATC: 0x%02x\n", __FUNCTION__,
|
|
inb(fir_base + IRCC_ATC));
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
|
|
*
|
|
* Probe transceiver smsc-ircc ATC circuitry
|
|
*
|
|
*/
|
|
|
|
static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
|
|
*
|
|
* Set transceiver
|
|
*
|
|
*/
|
|
|
|
static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
|
|
{
|
|
u8 fast_mode;
|
|
|
|
switch (speed) {
|
|
default:
|
|
case 576000 :
|
|
fast_mode = 0;
|
|
break;
|
|
case 1152000 :
|
|
case 4000000 :
|
|
fast_mode = IRCC_LCR_A_FAST;
|
|
break;
|
|
}
|
|
register_bank(fir_base, 0);
|
|
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
|
|
*
|
|
* Probe transceiver
|
|
*
|
|
*/
|
|
|
|
static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
|
|
*
|
|
* Set transceiver
|
|
*
|
|
*/
|
|
|
|
static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
|
|
{
|
|
u8 fast_mode;
|
|
|
|
switch (speed) {
|
|
default:
|
|
case 576000 :
|
|
fast_mode = 0;
|
|
break;
|
|
case 1152000 :
|
|
case 4000000 :
|
|
fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
|
|
break;
|
|
|
|
}
|
|
/* This causes an interrupt */
|
|
register_bank(fir_base, 0);
|
|
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
|
|
}
|
|
|
|
/*
|
|
* Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
|
|
*
|
|
* Probe transceiver
|
|
*
|
|
*/
|
|
|
|
static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
module_init(smsc_ircc_init);
|
|
module_exit(smsc_ircc_cleanup);
|