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author | Matt Porter <mporter@ti.com> | 2012-04-20 11:28:25 -0400 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-20 09:48:27 -0700 |
commit | 991214386dee8a3cd9adc743778f472ac8a12bbc (patch) | |
tree | 206e223e020176c4c6cc8cb6e7d4e01912d08a2a /drivers/parport/parport_pc.c | |
parent | 1790625feb3904f54c82e469a2e5997c3a01f4fa (diff) | |
download | linux-991214386dee8a3cd9adc743778f472ac8a12bbc.tar.gz linux-991214386dee8a3cd9adc743778f472ac8a12bbc.tar.bz2 linux-991214386dee8a3cd9adc743778f472ac8a12bbc.zip |
parport: remove unused dead code from lowlevel drivers
This unused code has been untouched for over 7 years and must
go.
Signed-off-by: Matt Porter <mporter@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/parport/parport_pc.c')
-rw-r--r-- | drivers/parport/parport_pc.c | 276 |
1 files changed, 0 insertions, 276 deletions
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c index 0cb64f50cecd..402956321d33 100644 --- a/drivers/parport/parport_pc.c +++ b/drivers/parport/parport_pc.c @@ -197,54 +197,6 @@ static int change_mode(struct parport *p, int m) ECR_WRITE(p, oecr); return 0; } - -#ifdef CONFIG_PARPORT_1284 -/* Find FIFO lossage; FIFO is reset */ -#if 0 -static int get_fifo_residue(struct parport *p) -{ - int residue; - int cnfga; - const struct parport_pc_private *priv = p->physport->private_data; - - /* Adjust for the contents of the FIFO. */ - for (residue = priv->fifo_depth; ; residue--) { - if (inb(ECONTROL(p)) & 0x2) - /* Full up. */ - break; - - outb(0, FIFO(p)); - } - - printk(KERN_DEBUG "%s: %d PWords were left in FIFO\n", p->name, - residue); - - /* Reset the FIFO. */ - frob_set_mode(p, ECR_PS2); - - /* Now change to config mode and clean up. FIXME */ - frob_set_mode(p, ECR_CNF); - cnfga = inb(CONFIGA(p)); - printk(KERN_DEBUG "%s: cnfgA contains 0x%02x\n", p->name, cnfga); - - if (!(cnfga & (1<<2))) { - printk(KERN_DEBUG "%s: Accounting for extra byte\n", p->name); - residue++; - } - - /* Don't care about partial PWords until support is added for - * PWord != 1 byte. */ - - /* Back to PS2 mode. */ - frob_set_mode(p, ECR_PS2); - - DPRINTK(KERN_DEBUG - "*** get_fifo_residue: done residue collecting (ecr = 0x%2.2x)\n", - inb(ECONTROL(p))); - return residue; -} -#endif /* 0 */ -#endif /* IEEE 1284 support */ #endif /* FIFO support */ /* @@ -940,234 +892,6 @@ static size_t parport_pc_ecp_write_block_pio(struct parport *port, return written; } - -#if 0 -static size_t parport_pc_ecp_read_block_pio(struct parport *port, - void *buf, size_t length, - int flags) -{ - size_t left = length; - size_t fifofull; - int r; - const int fifo = FIFO(port); - const struct parport_pc_private *priv = port->physport->private_data; - const int fifo_depth = priv->fifo_depth; - char *bufp = buf; - - port = port->physport; - DPRINTK(KERN_DEBUG "parport_pc: parport_pc_ecp_read_block_pio\n"); - dump_parport_state("enter fcn", port); - - /* Special case: a timeout of zero means we cannot call schedule(). - * Also if O_NONBLOCK is set then use the default implementation. */ - if (port->cad->timeout <= PARPORT_INACTIVITY_O_NONBLOCK) - return parport_ieee1284_ecp_read_data(port, buf, - length, flags); - - if (port->ieee1284.mode == IEEE1284_MODE_ECPRLE) { - /* If the peripheral is allowed to send RLE compressed - * data, it is possible for a byte to expand to 128 - * bytes in the FIFO. */ - fifofull = 128; - } else { - fifofull = fifo_depth; - } - - /* If the caller wants less than a full FIFO's worth of data, - * go through software emulation. Otherwise we may have to throw - * away data. */ - if (length < fifofull) - return parport_ieee1284_ecp_read_data(port, buf, - length, flags); - - if (port->ieee1284.phase != IEEE1284_PH_REV_IDLE) { - /* change to reverse-idle phase (must be in forward-idle) */ - - /* Event 38: Set nAutoFd low (also make sure nStrobe is high) */ - parport_frob_control(port, - PARPORT_CONTROL_AUTOFD - | PARPORT_CONTROL_STROBE, - PARPORT_CONTROL_AUTOFD); - parport_pc_data_reverse(port); /* Must be in PS2 mode */ - udelay(5); - /* Event 39: Set nInit low to initiate bus reversal */ - parport_frob_control(port, - PARPORT_CONTROL_INIT, - 0); - /* Event 40: Wait for nAckReverse (PError) to go low */ - r = parport_wait_peripheral(port, PARPORT_STATUS_PAPEROUT, 0); - if (r) { - printk(KERN_DEBUG "%s: PE timeout Event 40 (%d) " - "in ecp_read_block_pio\n", port->name, r); - return 0; - } - } - - /* Set up ECP FIFO mode.*/ -/* parport_pc_frob_control(port, - PARPORT_CONTROL_STROBE | - PARPORT_CONTROL_AUTOFD, - PARPORT_CONTROL_AUTOFD); */ - r = change_mode(port, ECR_ECP); /* ECP FIFO */ - if (r) - printk(KERN_DEBUG "%s: Warning change_mode ECR_ECP failed\n", - port->name); - - port->ieee1284.phase = IEEE1284_PH_REV_DATA; - - /* the first byte must be collected manually */ - dump_parport_state("pre 43", port); - /* Event 43: Wait for nAck to go low */ - r = parport_wait_peripheral(port, PARPORT_STATUS_ACK, 0); - if (r) { - /* timed out while reading -- no data */ - printk(KERN_DEBUG "PIO read timed out (initial byte)\n"); - goto out_no_data; - } - /* read byte */ - *bufp++ = inb(DATA(port)); - left--; - dump_parport_state("43-44", port); - /* Event 44: nAutoFd (HostAck) goes high to acknowledge */ - parport_pc_frob_control(port, - PARPORT_CONTROL_AUTOFD, - 0); - dump_parport_state("pre 45", port); - /* Event 45: Wait for nAck to go high */ - /* r = parport_wait_peripheral(port, PARPORT_STATUS_ACK, - PARPORT_STATUS_ACK); */ - dump_parport_state("post 45", port); - r = 0; - if (r) { - /* timed out while waiting for peripheral to respond to ack */ - printk(KERN_DEBUG "ECP PIO read timed out (waiting for nAck)\n"); - - /* keep hold of the byte we've got already */ - goto out_no_data; - } - /* Event 46: nAutoFd (HostAck) goes low to accept more data */ - parport_pc_frob_control(port, - PARPORT_CONTROL_AUTOFD, - PARPORT_CONTROL_AUTOFD); - - - dump_parport_state("rev idle", port); - /* Do the transfer. */ - while (left > fifofull) { - int ret; - unsigned long expire = jiffies + port->cad->timeout; - unsigned char ecrval = inb(ECONTROL(port)); - - if (need_resched() && time_before(jiffies, expire)) - /* Can't yield the port. */ - schedule(); - - /* At this point, the FIFO may already be full. In - * that case ECP is already holding back the - * peripheral (assuming proper design) with a delayed - * handshake. Work fast to avoid a peripheral - * timeout. */ - - if (ecrval & 0x01) { - /* FIFO is empty. Wait for interrupt. */ - dump_parport_state("FIFO empty", port); - - /* Anyone else waiting for the port? */ - if (port->waithead) { - printk(KERN_DEBUG "Somebody wants the port\n"); - break; - } - - /* Clear serviceIntr */ - ECR_WRITE(port, ecrval & ~(1<<2)); -false_alarm: - dump_parport_state("waiting", port); - ret = parport_wait_event(port, HZ); - DPRINTK(KERN_DEBUG "parport_wait_event returned %d\n", - ret); - if (ret < 0) - break; - ret = 0; - if (!time_before(jiffies, expire)) { - /* Timed out. */ - dump_parport_state("timeout", port); - printk(KERN_DEBUG "PIO read timed out\n"); - break; - } - ecrval = inb(ECONTROL(port)); - if (!(ecrval & (1<<2))) { - if (need_resched() && - time_before(jiffies, expire)) { - schedule(); - } - goto false_alarm; - } - - /* Depending on how the FIFO threshold was - * set, how long interrupt service took, and - * how fast the peripheral is, we might be - * lucky and have a just filled FIFO. */ - continue; - } - - if (ecrval & 0x02) { - /* FIFO is full. */ - dump_parport_state("FIFO full", port); - insb(fifo, bufp, fifo_depth); - bufp += fifo_depth; - left -= fifo_depth; - continue; - } - - DPRINTK(KERN_DEBUG - "*** ecp_read_block_pio: reading one byte from the FIFO\n"); - - /* FIFO not filled. We will cycle this loop for a while - * and either the peripheral will fill it faster, - * tripping a fast empty with insb, or we empty it. */ - *bufp++ = inb(fifo); - left--; - } - - /* scoop up anything left in the FIFO */ - while (left && !(inb(ECONTROL(port) & 0x01))) { - *bufp++ = inb(fifo); - left--; - } - - port->ieee1284.phase = IEEE1284_PH_REV_IDLE; - dump_parport_state("rev idle2", port); - -out_no_data: - - /* Go to forward idle mode to shut the peripheral up (event 47). */ - parport_frob_control(port, PARPORT_CONTROL_INIT, PARPORT_CONTROL_INIT); - - /* event 49: PError goes high */ - r = parport_wait_peripheral(port, - PARPORT_STATUS_PAPEROUT, - PARPORT_STATUS_PAPEROUT); - if (r) { - printk(KERN_DEBUG - "%s: PE timeout FWDIDLE (%d) in ecp_read_block_pio\n", - port->name, r); - } - - port->ieee1284.phase = IEEE1284_PH_FWD_IDLE; - - /* Finish up. */ - { - int lost = get_fifo_residue(port); - if (lost) - /* Shouldn't happen with compliant peripherals. */ - printk(KERN_DEBUG "%s: DATA LOSS (%d bytes)!\n", - port->name, lost); - } - - dump_parport_state("fwd idle", port); - return length - left; -} -#endif /* 0 */ #endif /* IEEE 1284 support */ #endif /* Allowed to use FIFO/DMA */ |