mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
[PATCH] AX88796 parallel port driver
Driver for the simple parallel port interface on the Asix AX88796 chip on an platform_bus. [akpm@osdl.org: x86_64 build fix] Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ben Dooks
Linus Torvalds
parent
11e64757f9
commit
ad4063b0b2
@ -136,6 +136,18 @@ config PARPORT_SUNBPP
|
||||
found on many Sun machines. Note that many of the newer Ultras
|
||||
actually have pc style hardware instead.
|
||||
|
||||
config PARPORT_AX88796
|
||||
tristate "AX88796 Parallel Port"
|
||||
depends on PARPORT
|
||||
select PARPORT_NOT_PC
|
||||
help
|
||||
Say Y here if you need support for the parallel port hardware on
|
||||
the AX88796 network controller chip. This code is also available
|
||||
as a module (say M), called parport_ax88796.
|
||||
|
||||
The driver is not dependant on the AX88796 network driver, and
|
||||
should not interfere with the networking functions of the chip.
|
||||
|
||||
config PARPORT_1284
|
||||
bool "IEEE 1284 transfer modes"
|
||||
depends on PARPORT
|
||||
|
||||
@ -17,4 +17,5 @@ obj-$(CONFIG_PARPORT_MFC3) += parport_mfc3.o
|
||||
obj-$(CONFIG_PARPORT_ATARI) += parport_atari.o
|
||||
obj-$(CONFIG_PARPORT_SUNBPP) += parport_sunbpp.o
|
||||
obj-$(CONFIG_PARPORT_GSC) += parport_gsc.o
|
||||
obj-$(CONFIG_PARPORT_IP32) += parport_ip32.o
|
||||
obj-$(CONFIG_PARPORT_AX88796) += parport_ax88796.o
|
||||
obj-$(CONFIG_PARPORT_IP32) += parport_ip32.o
|
||||
443
drivers/parport/parport_ax88796.c
Normal file
443
drivers/parport/parport_ax88796.c
Normal file
@ -0,0 +1,443 @@
|
||||
/* linux/drivers/parport/parport_ax88796.c
|
||||
*
|
||||
* (c) 2005,2006 Simtec Electronics
|
||||
* Ben Dooks <ben@simtec.co.uk>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/parport.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <asm/irq.h>
|
||||
|
||||
#define AX_SPR_BUSY (1<<7)
|
||||
#define AX_SPR_ACK (1<<6)
|
||||
#define AX_SPR_PE (1<<5)
|
||||
#define AX_SPR_SLCT (1<<4)
|
||||
#define AX_SPR_ERR (1<<3)
|
||||
|
||||
#define AX_CPR_nDOE (1<<5)
|
||||
#define AX_CPR_SLCTIN (1<<3)
|
||||
#define AX_CPR_nINIT (1<<2)
|
||||
#define AX_CPR_ATFD (1<<1)
|
||||
#define AX_CPR_STRB (1<<0)
|
||||
|
||||
struct ax_drvdata {
|
||||
struct parport *parport;
|
||||
struct parport_state suspend;
|
||||
|
||||
struct device *dev;
|
||||
struct resource *io;
|
||||
|
||||
unsigned char irq_enabled;
|
||||
|
||||
void __iomem *base;
|
||||
void __iomem *spp_data;
|
||||
void __iomem *spp_spr;
|
||||
void __iomem *spp_cpr;
|
||||
};
|
||||
|
||||
static inline struct ax_drvdata *pp_to_drv(struct parport *p)
|
||||
{
|
||||
return p->private_data;
|
||||
}
|
||||
|
||||
static unsigned char
|
||||
parport_ax88796_read_data(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
return readb(dd->spp_data);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_write_data(struct parport *p, unsigned char data)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
writeb(data, dd->spp_data);
|
||||
}
|
||||
|
||||
static unsigned char
|
||||
parport_ax88796_read_control(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned int cpr = readb(dd->spp_cpr);
|
||||
unsigned int ret = 0;
|
||||
|
||||
if (!(cpr & AX_CPR_STRB))
|
||||
ret |= PARPORT_CONTROL_STROBE;
|
||||
|
||||
if (!(cpr & AX_CPR_ATFD))
|
||||
ret |= PARPORT_CONTROL_AUTOFD;
|
||||
|
||||
if (cpr & AX_CPR_nINIT)
|
||||
ret |= PARPORT_CONTROL_INIT;
|
||||
|
||||
if (!(cpr & AX_CPR_SLCTIN))
|
||||
ret |= PARPORT_CONTROL_SELECT;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_write_control(struct parport *p, unsigned char control)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned int cpr = readb(dd->spp_cpr);
|
||||
|
||||
cpr &= AX_CPR_nDOE;
|
||||
|
||||
if (!(control & PARPORT_CONTROL_STROBE))
|
||||
cpr |= AX_CPR_STRB;
|
||||
|
||||
if (!(control & PARPORT_CONTROL_AUTOFD))
|
||||
cpr |= AX_CPR_ATFD;
|
||||
|
||||
if (control & PARPORT_CONTROL_INIT)
|
||||
cpr |= AX_CPR_nINIT;
|
||||
|
||||
if (!(control & PARPORT_CONTROL_SELECT))
|
||||
cpr |= AX_CPR_SLCTIN;
|
||||
|
||||
dev_dbg(dd->dev, "write_control: ctrl=%02x, cpr=%02x\n", control, cpr);
|
||||
writeb(cpr, dd->spp_cpr);
|
||||
|
||||
if (parport_ax88796_read_control(p) != control) {
|
||||
dev_err(dd->dev, "write_control: read != set (%02x, %02x)\n",
|
||||
parport_ax88796_read_control(p), control);
|
||||
}
|
||||
}
|
||||
|
||||
static unsigned char
|
||||
parport_ax88796_read_status(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned int status = readb(dd->spp_spr);
|
||||
unsigned int ret = 0;
|
||||
|
||||
if (status & AX_SPR_BUSY)
|
||||
ret |= PARPORT_STATUS_BUSY;
|
||||
|
||||
if (status & AX_SPR_ACK)
|
||||
ret |= PARPORT_STATUS_ACK;
|
||||
|
||||
if (status & AX_SPR_ERR)
|
||||
ret |= PARPORT_STATUS_ERROR;
|
||||
|
||||
if (status & AX_SPR_SLCT)
|
||||
ret |= PARPORT_STATUS_SELECT;
|
||||
|
||||
if (status & AX_SPR_PE)
|
||||
ret |= PARPORT_STATUS_PAPEROUT;
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static unsigned char
|
||||
parport_ax88796_frob_control(struct parport *p, unsigned char mask,
|
||||
unsigned char val)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned char old = parport_ax88796_read_control(p);
|
||||
|
||||
dev_dbg(dd->dev, "frob: mask=%02x, val=%02x, old=%02x\n",
|
||||
mask, val, old);
|
||||
|
||||
parport_ax88796_write_control(p, (old & ~mask) | val);
|
||||
return old;
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_enable_irq(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
if (!dd->irq_enabled) {
|
||||
enable_irq(p->irq);
|
||||
dd->irq_enabled = 1;
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_disable_irq(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
if (dd->irq_enabled) {
|
||||
disable_irq(p->irq);
|
||||
dd->irq_enabled = 0;
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_data_forward(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
void __iomem *cpr = dd->spp_cpr;
|
||||
|
||||
writeb((readb(cpr) & ~AX_CPR_nDOE), cpr);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_data_reverse(struct parport *p)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
void __iomem *cpr = dd->spp_cpr;
|
||||
|
||||
writeb(readb(cpr) | AX_CPR_nDOE, cpr);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_init_state(struct pardevice *d, struct parport_state *s)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(d->port);
|
||||
|
||||
memset(s, 0, sizeof(struct parport_state));
|
||||
|
||||
dev_dbg(dd->dev, "init_state: %p: state=%p\n", d, s);
|
||||
s->u.ax88796.cpr = readb(dd->spp_cpr);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_save_state(struct parport *p, struct parport_state *s)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
dev_dbg(dd->dev, "save_state: %p: state=%p\n", p, s);
|
||||
s->u.ax88796.cpr = readb(dd->spp_cpr);
|
||||
}
|
||||
|
||||
static void
|
||||
parport_ax88796_restore_state(struct parport *p, struct parport_state *s)
|
||||
{
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
dev_dbg(dd->dev, "restore_state: %p: state=%p\n", p, s);
|
||||
writeb(s->u.ax88796.cpr, dd->spp_cpr);
|
||||
}
|
||||
|
||||
static irqreturn_t
|
||||
parport_ax88796_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
||||
{
|
||||
parport_generic_irq(irq, dev_id, regs);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
|
||||
static struct parport_operations parport_ax88796_ops = {
|
||||
.write_data = parport_ax88796_write_data,
|
||||
.read_data = parport_ax88796_read_data,
|
||||
|
||||
.write_control = parport_ax88796_write_control,
|
||||
.read_control = parport_ax88796_read_control,
|
||||
.frob_control = parport_ax88796_frob_control,
|
||||
|
||||
.read_status = parport_ax88796_read_status,
|
||||
|
||||
.enable_irq = parport_ax88796_enable_irq,
|
||||
.disable_irq = parport_ax88796_disable_irq,
|
||||
|
||||
.data_forward = parport_ax88796_data_forward,
|
||||
.data_reverse = parport_ax88796_data_reverse,
|
||||
|
||||
.init_state = parport_ax88796_init_state,
|
||||
.save_state = parport_ax88796_save_state,
|
||||
.restore_state = parport_ax88796_restore_state,
|
||||
|
||||
.epp_write_data = parport_ieee1284_epp_write_data,
|
||||
.epp_read_data = parport_ieee1284_epp_read_data,
|
||||
.epp_write_addr = parport_ieee1284_epp_write_addr,
|
||||
.epp_read_addr = parport_ieee1284_epp_read_addr,
|
||||
|
||||
.ecp_write_data = parport_ieee1284_ecp_write_data,
|
||||
.ecp_read_data = parport_ieee1284_ecp_read_data,
|
||||
.ecp_write_addr = parport_ieee1284_ecp_write_addr,
|
||||
|
||||
.compat_write_data = parport_ieee1284_write_compat,
|
||||
.nibble_read_data = parport_ieee1284_read_nibble,
|
||||
.byte_read_data = parport_ieee1284_read_byte,
|
||||
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static int parport_ax88796_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device *_dev = &pdev->dev;
|
||||
struct ax_drvdata *dd;
|
||||
struct parport *pp = NULL;
|
||||
struct resource *res;
|
||||
unsigned long size;
|
||||
int spacing;
|
||||
int irq;
|
||||
int ret;
|
||||
|
||||
dd = kzalloc(sizeof(struct ax_drvdata), GFP_KERNEL);
|
||||
if (dd == NULL) {
|
||||
dev_err(_dev, "no memory for private data\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
if (res == NULL) {
|
||||
dev_err(_dev, "no MEM specified\n");
|
||||
ret = -ENXIO;
|
||||
goto exit_mem;
|
||||
}
|
||||
|
||||
size = (res->end - res->start) + 1;
|
||||
spacing = size / 3;
|
||||
|
||||
dd->io = request_mem_region(res->start, size, pdev->name);
|
||||
if (dd->io == NULL) {
|
||||
dev_err(_dev, "cannot reserve memory\n");
|
||||
ret = -ENXIO;
|
||||
goto exit_mem;
|
||||
}
|
||||
|
||||
dd->base = ioremap(res->start, size);
|
||||
if (dd->base == NULL) {
|
||||
dev_err(_dev, "cannot ioremap region\n");
|
||||
ret = -ENXIO;
|
||||
goto exit_res;
|
||||
}
|
||||
|
||||
irq = platform_get_irq(pdev, 0);
|
||||
if (irq <= 0)
|
||||
irq = PARPORT_IRQ_NONE;
|
||||
|
||||
pp = parport_register_port((unsigned long)dd->base, irq,
|
||||
PARPORT_DMA_NONE,
|
||||
&parport_ax88796_ops);
|
||||
|
||||
if (pp == NULL) {
|
||||
dev_err(_dev, "failed to register parallel port\n");
|
||||
ret = -ENOMEM;
|
||||
goto exit_unmap;
|
||||
}
|
||||
|
||||
pp->private_data = dd;
|
||||
dd->parport = pp;
|
||||
dd->dev = _dev;
|
||||
|
||||
dd->spp_data = dd->base;
|
||||
dd->spp_spr = dd->base + (spacing * 1);
|
||||
dd->spp_cpr = dd->base + (spacing * 2);
|
||||
|
||||
/* initialise the port controls */
|
||||
writeb(AX_CPR_STRB, dd->spp_cpr);
|
||||
|
||||
if (irq >= 0) {
|
||||
/* request irq */
|
||||
ret = request_irq(irq, parport_ax88796_interrupt,
|
||||
SA_TRIGGER_FALLING, pdev->name, pp);
|
||||
|
||||
if (ret < 0)
|
||||
goto exit_port;
|
||||
|
||||
dd->irq_enabled = 1;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, pp);
|
||||
|
||||
dev_info(_dev, "attached parallel port driver\n");
|
||||
parport_announce_port(pp);
|
||||
|
||||
return 0;
|
||||
|
||||
exit_port:
|
||||
parport_remove_port(pp);
|
||||
exit_unmap:
|
||||
iounmap(dd->base);
|
||||
exit_res:
|
||||
release_resource(dd->io);
|
||||
kfree(dd->io);
|
||||
exit_mem:
|
||||
kfree(dd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int parport_ax88796_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct parport *p = platform_get_drvdata(pdev);
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
free_irq(p->irq, p);
|
||||
parport_remove_port(p);
|
||||
iounmap(dd->base);
|
||||
release_resource(dd->io);
|
||||
kfree(dd->io);
|
||||
kfree(dd);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
|
||||
static int parport_ax88796_suspend(struct platform_device *dev,
|
||||
pm_message_t state)
|
||||
{
|
||||
struct parport *p = platform_get_drvdata(dev);
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
parport_ax88796_save_state(p, &dd->suspend);
|
||||
writeb(AX_CPR_nDOE | AX_CPR_STRB, dd->spp_cpr);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int parport_ax88796_resume(struct platform_device *dev)
|
||||
{
|
||||
struct parport *p = platform_get_drvdata(dev);
|
||||
struct ax_drvdata *dd = pp_to_drv(p);
|
||||
|
||||
parport_ax88796_restore_state(p, &dd->suspend);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
#define parport_ax88796_suspend NULL
|
||||
#define parport_ax88796_resume NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver axdrv = {
|
||||
.driver = {
|
||||
.name = "ax88796-pp",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = parport_ax88796_probe,
|
||||
.remove = parport_ax88796_remove,
|
||||
.suspend = parport_ax88796_suspend,
|
||||
.resume = parport_ax88796_resume,
|
||||
};
|
||||
|
||||
static int __init parport_ax88796_init(void)
|
||||
{
|
||||
return platform_driver_register(&axdrv);
|
||||
}
|
||||
|
||||
static void __exit parport_ax88796_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&axdrv);
|
||||
}
|
||||
|
||||
module_init(parport_ax88796_init)
|
||||
module_exit(parport_ax88796_exit)
|
||||
|
||||
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
|
||||
MODULE_DESCRIPTION("AX88796 Parport parallel port driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
@ -127,6 +127,10 @@ struct amiga_parport_state {
|
||||
unsigned char statusdir;/* ciab.ddrb & 7 */
|
||||
};
|
||||
|
||||
struct ax88796_parport_state {
|
||||
unsigned char cpr;
|
||||
};
|
||||
|
||||
struct ip32_parport_state {
|
||||
unsigned int dcr;
|
||||
unsigned int ecr;
|
||||
@ -138,6 +142,7 @@ struct parport_state {
|
||||
/* ARC has no state. */
|
||||
struct ax_parport_state ax;
|
||||
struct amiga_parport_state amiga;
|
||||
struct ax88796_parport_state ax88796;
|
||||
/* Atari has not state. */
|
||||
struct ip32_parport_state ip32;
|
||||
void *misc;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user