412 lines
10 KiB
C
412 lines
10 KiB
C
/* parport_sunbpp.c: Parallel-port routines for SBUS
|
|
*
|
|
* Author: Derrick J. Brashear <shadow@dementia.org>
|
|
*
|
|
* based on work by:
|
|
* Phil Blundell <philb@gnu.org>
|
|
* Tim Waugh <tim@cyberelk.demon.co.uk>
|
|
* Jose Renau <renau@acm.org>
|
|
* David Campbell <campbell@tirian.che.curtin.edu.au>
|
|
* Grant Guenther <grant@torque.net>
|
|
* Eddie C. Dost <ecd@skynet.be>
|
|
* Stephen Williams (steve@icarus.com)
|
|
* Gus Baldauf (gbaldauf@ix.netcom.com)
|
|
* Peter Zaitcev
|
|
* Tom Dyas
|
|
*
|
|
* Updated to new SBUS device framework: David S. Miller <davem@davemloft.net>
|
|
*
|
|
*/
|
|
|
|
#include <linux/string.h>
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include <linux/parport.h>
|
|
|
|
#include <asm/ptrace.h>
|
|
#include <linux/interrupt.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/oplib.h> /* OpenProm Library */
|
|
#include <asm/dma.h> /* BPP uses LSI 64854 for DMA */
|
|
#include <asm/irq.h>
|
|
#include <asm/sunbpp.h>
|
|
|
|
#undef __SUNBPP_DEBUG
|
|
#ifdef __SUNBPP_DEBUG
|
|
#define dprintk(x) printk x
|
|
#else
|
|
#define dprintk(x)
|
|
#endif
|
|
|
|
static void parport_sunbpp_disable_irq(struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
u32 tmp;
|
|
|
|
tmp = sbus_readl(®s->p_csr);
|
|
tmp &= ~DMA_INT_ENAB;
|
|
sbus_writel(tmp, ®s->p_csr);
|
|
}
|
|
|
|
static void parport_sunbpp_enable_irq(struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
u32 tmp;
|
|
|
|
tmp = sbus_readl(®s->p_csr);
|
|
tmp |= DMA_INT_ENAB;
|
|
sbus_writel(tmp, ®s->p_csr);
|
|
}
|
|
|
|
static void parport_sunbpp_write_data(struct parport *p, unsigned char d)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
|
|
sbus_writeb(d, ®s->p_dr);
|
|
dprintk((KERN_DEBUG "wrote 0x%x\n", d));
|
|
}
|
|
|
|
static unsigned char parport_sunbpp_read_data(struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
|
|
return sbus_readb(®s->p_dr);
|
|
}
|
|
|
|
#if 0
|
|
static void control_pc_to_sunbpp(struct parport *p, unsigned char status)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
unsigned char value_tcr = sbus_readb(®s->p_tcr);
|
|
unsigned char value_or = sbus_readb(®s->p_or);
|
|
|
|
if (status & PARPORT_CONTROL_STROBE)
|
|
value_tcr |= P_TCR_DS;
|
|
if (status & PARPORT_CONTROL_AUTOFD)
|
|
value_or |= P_OR_AFXN;
|
|
if (status & PARPORT_CONTROL_INIT)
|
|
value_or |= P_OR_INIT;
|
|
if (status & PARPORT_CONTROL_SELECT)
|
|
value_or |= P_OR_SLCT_IN;
|
|
|
|
sbus_writeb(value_or, ®s->p_or);
|
|
sbus_writeb(value_tcr, ®s->p_tcr);
|
|
}
|
|
#endif
|
|
|
|
static unsigned char status_sunbpp_to_pc(struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
unsigned char bits = 0;
|
|
unsigned char value_tcr = sbus_readb(®s->p_tcr);
|
|
unsigned char value_ir = sbus_readb(®s->p_ir);
|
|
|
|
if (!(value_ir & P_IR_ERR))
|
|
bits |= PARPORT_STATUS_ERROR;
|
|
if (!(value_ir & P_IR_SLCT))
|
|
bits |= PARPORT_STATUS_SELECT;
|
|
if (!(value_ir & P_IR_PE))
|
|
bits |= PARPORT_STATUS_PAPEROUT;
|
|
if (value_tcr & P_TCR_ACK)
|
|
bits |= PARPORT_STATUS_ACK;
|
|
if (!(value_tcr & P_TCR_BUSY))
|
|
bits |= PARPORT_STATUS_BUSY;
|
|
|
|
dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", value_tcr, value_ir));
|
|
dprintk((KERN_DEBUG "read status 0x%x\n", bits));
|
|
return bits;
|
|
}
|
|
|
|
static unsigned char control_sunbpp_to_pc(struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
unsigned char bits = 0;
|
|
unsigned char value_tcr = sbus_readb(®s->p_tcr);
|
|
unsigned char value_or = sbus_readb(®s->p_or);
|
|
|
|
if (!(value_tcr & P_TCR_DS))
|
|
bits |= PARPORT_CONTROL_STROBE;
|
|
if (!(value_or & P_OR_AFXN))
|
|
bits |= PARPORT_CONTROL_AUTOFD;
|
|
if (!(value_or & P_OR_INIT))
|
|
bits |= PARPORT_CONTROL_INIT;
|
|
if (value_or & P_OR_SLCT_IN)
|
|
bits |= PARPORT_CONTROL_SELECT;
|
|
|
|
dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", value_tcr, value_or));
|
|
dprintk((KERN_DEBUG "read control 0x%x\n", bits));
|
|
return bits;
|
|
}
|
|
|
|
static unsigned char parport_sunbpp_read_control(struct parport *p)
|
|
{
|
|
return control_sunbpp_to_pc(p);
|
|
}
|
|
|
|
static unsigned char parport_sunbpp_frob_control(struct parport *p,
|
|
unsigned char mask,
|
|
unsigned char val)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
unsigned char value_tcr = sbus_readb(®s->p_tcr);
|
|
unsigned char value_or = sbus_readb(®s->p_or);
|
|
|
|
dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n",
|
|
value_tcr, value_or));
|
|
if (mask & PARPORT_CONTROL_STROBE) {
|
|
if (val & PARPORT_CONTROL_STROBE) {
|
|
value_tcr &= ~P_TCR_DS;
|
|
} else {
|
|
value_tcr |= P_TCR_DS;
|
|
}
|
|
}
|
|
if (mask & PARPORT_CONTROL_AUTOFD) {
|
|
if (val & PARPORT_CONTROL_AUTOFD) {
|
|
value_or &= ~P_OR_AFXN;
|
|
} else {
|
|
value_or |= P_OR_AFXN;
|
|
}
|
|
}
|
|
if (mask & PARPORT_CONTROL_INIT) {
|
|
if (val & PARPORT_CONTROL_INIT) {
|
|
value_or &= ~P_OR_INIT;
|
|
} else {
|
|
value_or |= P_OR_INIT;
|
|
}
|
|
}
|
|
if (mask & PARPORT_CONTROL_SELECT) {
|
|
if (val & PARPORT_CONTROL_SELECT) {
|
|
value_or |= P_OR_SLCT_IN;
|
|
} else {
|
|
value_or &= ~P_OR_SLCT_IN;
|
|
}
|
|
}
|
|
|
|
sbus_writeb(value_or, ®s->p_or);
|
|
sbus_writeb(value_tcr, ®s->p_tcr);
|
|
dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n",
|
|
value_tcr, value_or));
|
|
return parport_sunbpp_read_control(p);
|
|
}
|
|
|
|
static void parport_sunbpp_write_control(struct parport *p, unsigned char d)
|
|
{
|
|
const unsigned char wm = (PARPORT_CONTROL_STROBE |
|
|
PARPORT_CONTROL_AUTOFD |
|
|
PARPORT_CONTROL_INIT |
|
|
PARPORT_CONTROL_SELECT);
|
|
|
|
parport_sunbpp_frob_control (p, wm, d & wm);
|
|
}
|
|
|
|
static unsigned char parport_sunbpp_read_status(struct parport *p)
|
|
{
|
|
return status_sunbpp_to_pc(p);
|
|
}
|
|
|
|
static void parport_sunbpp_data_forward (struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
unsigned char value_tcr = sbus_readb(®s->p_tcr);
|
|
|
|
dprintk((KERN_DEBUG "forward\n"));
|
|
value_tcr &= ~P_TCR_DIR;
|
|
sbus_writeb(value_tcr, ®s->p_tcr);
|
|
}
|
|
|
|
static void parport_sunbpp_data_reverse (struct parport *p)
|
|
{
|
|
struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;
|
|
u8 val = sbus_readb(®s->p_tcr);
|
|
|
|
dprintk((KERN_DEBUG "reverse\n"));
|
|
val |= P_TCR_DIR;
|
|
sbus_writeb(val, ®s->p_tcr);
|
|
}
|
|
|
|
static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s)
|
|
{
|
|
s->u.pc.ctr = 0xc;
|
|
s->u.pc.ecr = 0x0;
|
|
}
|
|
|
|
static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s)
|
|
{
|
|
s->u.pc.ctr = parport_sunbpp_read_control(p);
|
|
}
|
|
|
|
static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s)
|
|
{
|
|
parport_sunbpp_write_control(p, s->u.pc.ctr);
|
|
}
|
|
|
|
static struct parport_operations parport_sunbpp_ops =
|
|
{
|
|
.write_data = parport_sunbpp_write_data,
|
|
.read_data = parport_sunbpp_read_data,
|
|
|
|
.write_control = parport_sunbpp_write_control,
|
|
.read_control = parport_sunbpp_read_control,
|
|
.frob_control = parport_sunbpp_frob_control,
|
|
|
|
.read_status = parport_sunbpp_read_status,
|
|
|
|
.enable_irq = parport_sunbpp_enable_irq,
|
|
.disable_irq = parport_sunbpp_disable_irq,
|
|
|
|
.data_forward = parport_sunbpp_data_forward,
|
|
.data_reverse = parport_sunbpp_data_reverse,
|
|
|
|
.init_state = parport_sunbpp_init_state,
|
|
.save_state = parport_sunbpp_save_state,
|
|
.restore_state = parport_sunbpp_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 __devinit bpp_probe(struct platform_device *op)
|
|
{
|
|
struct parport_operations *ops;
|
|
struct bpp_regs __iomem *regs;
|
|
int irq, dma, err = 0, size;
|
|
unsigned char value_tcr;
|
|
void __iomem *base;
|
|
struct parport *p;
|
|
|
|
irq = op->archdata.irqs[0];
|
|
base = of_ioremap(&op->resource[0], 0,
|
|
resource_size(&op->resource[0]),
|
|
"sunbpp");
|
|
if (!base)
|
|
return -ENODEV;
|
|
|
|
size = resource_size(&op->resource[0]);
|
|
dma = PARPORT_DMA_NONE;
|
|
|
|
ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL);
|
|
if (!ops)
|
|
goto out_unmap;
|
|
|
|
memcpy (ops, &parport_sunbpp_ops, sizeof(struct parport_operations));
|
|
|
|
dprintk(("register_port\n"));
|
|
if (!(p = parport_register_port((unsigned long)base, irq, dma, ops)))
|
|
goto out_free_ops;
|
|
|
|
p->size = size;
|
|
p->dev = &op->dev;
|
|
|
|
if ((err = request_irq(p->irq, parport_irq_handler,
|
|
IRQF_SHARED, p->name, p)) != 0) {
|
|
goto out_put_port;
|
|
}
|
|
|
|
parport_sunbpp_enable_irq(p);
|
|
|
|
regs = (struct bpp_regs __iomem *)p->base;
|
|
|
|
value_tcr = sbus_readb(®s->p_tcr);
|
|
value_tcr &= ~P_TCR_DIR;
|
|
sbus_writeb(value_tcr, ®s->p_tcr);
|
|
|
|
printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base);
|
|
|
|
dev_set_drvdata(&op->dev, p);
|
|
|
|
parport_announce_port(p);
|
|
|
|
return 0;
|
|
|
|
out_put_port:
|
|
parport_put_port(p);
|
|
|
|
out_free_ops:
|
|
kfree(ops);
|
|
|
|
out_unmap:
|
|
of_iounmap(&op->resource[0], base, size);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __devexit bpp_remove(struct platform_device *op)
|
|
{
|
|
struct parport *p = dev_get_drvdata(&op->dev);
|
|
struct parport_operations *ops = p->ops;
|
|
|
|
parport_remove_port(p);
|
|
|
|
if (p->irq != PARPORT_IRQ_NONE) {
|
|
parport_sunbpp_disable_irq(p);
|
|
free_irq(p->irq, p);
|
|
}
|
|
|
|
of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);
|
|
parport_put_port(p);
|
|
kfree(ops);
|
|
|
|
dev_set_drvdata(&op->dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id bpp_match[] = {
|
|
{
|
|
.name = "SUNW,bpp",
|
|
},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(of, bpp_match);
|
|
|
|
static struct platform_driver bpp_sbus_driver = {
|
|
.driver = {
|
|
.name = "bpp",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = bpp_match,
|
|
},
|
|
.probe = bpp_probe,
|
|
.remove = __devexit_p(bpp_remove),
|
|
};
|
|
|
|
static int __init parport_sunbpp_init(void)
|
|
{
|
|
return platform_driver_register(&bpp_sbus_driver);
|
|
}
|
|
|
|
static void __exit parport_sunbpp_exit(void)
|
|
{
|
|
platform_driver_unregister(&bpp_sbus_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Derrick J Brashear");
|
|
MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port");
|
|
MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port");
|
|
MODULE_VERSION("2.0");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(parport_sunbpp_init)
|
|
module_exit(parport_sunbpp_exit)
|