parallel port support, found via google. tested by fenrir
SVN-Revision: 412v19.07.3_mercusys_ac12_duma
Waldemar Brodkorb
19 years ago
parent
f4a21697cd
commit
f53986ed6a
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/* Low-level parallel port routines for the ASUS WL-500g built-in port
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*
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* Author: Nuno Grilo <nuno.grilo@netcabo.pt>
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* Based on parport_pc source
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/parport.h>
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#include <linux/parport_pc.h>
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#define SPLINK_ADDRESS 0xBF800010
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#undef DEBUG
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#ifdef DEBUG
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#define DPRINTK printk
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#else
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#define DPRINTK(stuff...)
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#endif
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/* __parport_splink_frob_control differs from parport_splink_frob_control in that
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* it doesn't do any extra masking. */
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static __inline__ unsigned char __parport_splink_frob_control (struct parport *p,
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unsigned char mask,
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unsigned char val)
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{
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struct parport_pc_private *priv = p->physport->private_data;
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unsigned char *io = (unsigned char *) p->base;
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unsigned char ctr = priv->ctr;
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#ifdef DEBUG_PARPORT
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printk (KERN_DEBUG
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"__parport_splink_frob_control(%02x,%02x): %02x -> %02x\n",
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mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable);
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#endif
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ctr = (ctr & ~mask) ^ val;
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ctr &= priv->ctr_writable; /* only write writable bits. */
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*(io+2) = ctr;
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priv->ctr = ctr; /* Update soft copy */
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return ctr;
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}
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static void parport_splink_data_forward (struct parport *p)
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{
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DPRINTK(KERN_DEBUG "parport_splink: parport_data_forward called\n");
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__parport_splink_frob_control (p, 0x20, 0);
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}
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static void parport_splink_data_reverse (struct parport *p)
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{
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DPRINTK(KERN_DEBUG "parport_splink: parport_data_forward called\n");
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__parport_splink_frob_control (p, 0x20, 0x20);
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}
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/*
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static void parport_splink_interrupt(int irq, void *dev_id, struct pt_regs *regs)
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{
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DPRINTK(KERN_DEBUG "parport_splink: IRQ handler called\n");
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parport_generic_irq(irq, (struct parport *) dev_id, regs);
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}
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*/
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static void parport_splink_enable_irq(struct parport *p)
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{
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DPRINTK(KERN_DEBUG "parport_splink: parport_splink_enable_irq called\n");
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__parport_splink_frob_control (p, 0x10, 0x10);
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}
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static void parport_splink_disable_irq(struct parport *p)
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{
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DPRINTK(KERN_DEBUG "parport_splink: parport_splink_disable_irq called\n");
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__parport_splink_frob_control (p, 0x10, 0);
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}
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static void parport_splink_init_state(struct pardevice *dev, struct parport_state *s)
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{
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DPRINTK(KERN_DEBUG "parport_splink: parport_splink_init_state called\n");
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s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
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if (dev->irq_func &&
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dev->port->irq != PARPORT_IRQ_NONE)
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/* Set ackIntEn */
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s->u.pc.ctr |= 0x10;
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}
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static void parport_splink_save_state(struct parport *p, struct parport_state *s)
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{
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const struct parport_pc_private *priv = p->physport->private_data;
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DPRINTK(KERN_DEBUG "parport_splink: parport_splink_save_state called\n");
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s->u.pc.ctr = priv->ctr;
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}
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static void parport_splink_restore_state(struct parport *p, struct parport_state *s)
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{
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struct parport_pc_private *priv = p->physport->private_data;
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unsigned char *io = (unsigned char *) p->base;
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unsigned char ctr = s->u.pc.ctr;
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DPRINTK(KERN_DEBUG "parport_splink: parport_splink_restore_state called\n");
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*(io+2) = ctr;
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priv->ctr = ctr;
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}
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static void parport_splink_setup_interrupt(void) {
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return;
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}
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static void parport_splink_write_data(struct parport *p, unsigned char d) {
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DPRINTK(KERN_DEBUG "parport_splink: write data called\n");
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unsigned char *io = (unsigned char *) p->base;
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*io = d;
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}
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static unsigned char parport_splink_read_data(struct parport *p) {
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DPRINTK(KERN_DEBUG "parport_splink: read data called\n");
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unsigned char *io = (unsigned char *) p->base;
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return *io;
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}
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static void parport_splink_write_control(struct parport *p, unsigned char d)
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{
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const unsigned char wm = (PARPORT_CONTROL_STROBE |
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PARPORT_CONTROL_AUTOFD |
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PARPORT_CONTROL_INIT |
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PARPORT_CONTROL_SELECT);
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DPRINTK(KERN_DEBUG "parport_splink: write control called\n");
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/* Take this out when drivers have adapted to the newer interface. */
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if (d & 0x20) {
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printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n",
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p->name, p->cad->name);
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parport_splink_data_reverse (p);
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}
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__parport_splink_frob_control (p, wm, d & wm);
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}
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static unsigned char parport_splink_read_control(struct parport *p)
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{
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const unsigned char wm = (PARPORT_CONTROL_STROBE |
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PARPORT_CONTROL_AUTOFD |
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PARPORT_CONTROL_INIT |
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PARPORT_CONTROL_SELECT);
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DPRINTK(KERN_DEBUG "parport_splink: read control called\n");
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const struct parport_pc_private *priv = p->physport->private_data;
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return priv->ctr & wm; /* Use soft copy */
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}
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static unsigned char parport_splink_frob_control (struct parport *p, unsigned char mask,
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unsigned char val)
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{
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const unsigned char wm = (PARPORT_CONTROL_STROBE |
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PARPORT_CONTROL_AUTOFD |
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PARPORT_CONTROL_INIT |
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PARPORT_CONTROL_SELECT);
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DPRINTK(KERN_DEBUG "parport_splink: frob control called\n");
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/* Take this out when drivers have adapted to the newer interface. */
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if (mask & 0x20) {
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printk (KERN_DEBUG "%s (%s): use data_%s for this!\n",
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p->name, p->cad->name,
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(val & 0x20) ? "reverse" : "forward");
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if (val & 0x20)
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parport_splink_data_reverse (p);
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else
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parport_splink_data_forward (p);
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}
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/* Restrict mask and val to control lines. */
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mask &= wm;
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val &= wm;
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return __parport_splink_frob_control (p, mask, val);
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}
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static unsigned char parport_splink_read_status(struct parport *p)
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{
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DPRINTK(KERN_DEBUG "parport_splink: read status called\n");
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unsigned char *io = (unsigned char *) p->base;
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return *(io+1);
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}
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static void parport_splink_inc_use_count(void)
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{
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#ifdef MODULE
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MOD_INC_USE_COUNT;
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#endif
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}
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static void parport_splink_dec_use_count(void)
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{
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#ifdef MODULE
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MOD_DEC_USE_COUNT;
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#endif
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}
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static struct parport_operations parport_splink_ops =
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{
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parport_splink_write_data,
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parport_splink_read_data,
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parport_splink_write_control,
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parport_splink_read_control,
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parport_splink_frob_control,
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parport_splink_read_status,
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parport_splink_enable_irq,
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parport_splink_disable_irq,
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parport_splink_data_forward,
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parport_splink_data_reverse,
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parport_splink_init_state,
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parport_splink_save_state,
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parport_splink_restore_state,
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parport_splink_inc_use_count,
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parport_splink_dec_use_count,
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parport_ieee1284_epp_write_data,
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parport_ieee1284_epp_read_data,
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parport_ieee1284_epp_write_addr,
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parport_ieee1284_epp_read_addr,
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parport_ieee1284_ecp_write_data,
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parport_ieee1284_ecp_read_data,
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parport_ieee1284_ecp_write_addr,
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parport_ieee1284_write_compat,
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parport_ieee1284_read_nibble,
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parport_ieee1284_read_byte,
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};
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/* --- Initialisation code -------------------------------- */
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static struct parport *parport_splink_probe_port (unsigned long int base)
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{
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struct parport_pc_private *priv;
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struct parport_operations *ops;
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struct parport *p;
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if (check_mem_region(base, 3)) {
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printk (KERN_DEBUG "parport (0x%lx): iomem region not available\n", base);
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return NULL;
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}
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priv = kmalloc (sizeof (struct parport_pc_private), GFP_KERNEL);
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if (!priv) {
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printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base);
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return NULL;
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}
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ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
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if (!ops) {
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printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n",
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base);
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kfree (priv);
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return NULL;
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}
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memcpy (ops, &parport_splink_ops, sizeof (struct parport_operations));
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priv->ctr = 0xc;
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priv->ctr_writable = 0xff;
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if (!(p = parport_register_port(base, PARPORT_IRQ_NONE,
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PARPORT_DMA_NONE, ops))) {
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printk (KERN_DEBUG "parport (0x%lx): registration failed!\n",
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base);
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kfree (priv);
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kfree (ops);
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return NULL;
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}
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p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
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p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
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p->private_data = priv;
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parport_proc_register(p);
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request_mem_region (p->base, 3, p->name);
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/* Done probing. Now put the port into a sensible start-up state. */
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parport_splink_write_data(p, 0);
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parport_splink_data_forward (p);
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/* Now that we've told the sharing engine about the port, and
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found out its characteristics, let the high-level drivers
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know about it. */
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parport_announce_port (p);
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DPRINTK(KERN_DEBUG "parport (0x%lx): init ok!\n",
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base);
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return p;
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}
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static void parport_splink_unregister_port(struct parport *p) {
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struct parport_pc_private *priv = p->private_data;
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struct parport_operations *ops = p->ops;
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if (p->irq != PARPORT_IRQ_NONE)
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free_irq(p->irq, p);
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release_mem_region(p->base, 3);
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parport_proc_unregister(p);
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kfree (priv);
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parport_unregister_port(p);
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kfree (ops);
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}
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int parport_splink_init(void)
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{
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int ret;
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DPRINTK(KERN_DEBUG "parport_splink init called\n");
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parport_splink_setup_interrupt();
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ret = !parport_splink_probe_port(SPLINK_ADDRESS);
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return ret;
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}
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void parport_splink_cleanup(void) {
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struct parport *p = parport_enumerate(), *tmp;
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DPRINTK(KERN_DEBUG "parport_splink cleanup called\n");
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if (p->size) {
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if (p->modes & PARPORT_MODE_PCSPP) {
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while(p) {
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tmp = p->next;
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parport_splink_unregister_port(p);
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p = tmp;
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}
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}
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}
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}
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MODULE_AUTHOR("Nuno Grilo <nuno.grilo@netcabo.pt>");
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MODULE_DESCRIPTION("Parport Driver for ASUS WL-500g router builtin Port");
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MODULE_SUPPORTED_DEVICE("ASUS WL-500g builtin Parallel Port");
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MODULE_LICENSE("GPL");
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module_init(parport_splink_init)
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module_exit(parport_splink_cleanup)
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