diff options
Diffstat (limited to 'drivers/parport/parport_gsc.h')
| -rw-r--r-- | drivers/parport/parport_gsc.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/parport/parport_gsc.h b/drivers/parport/parport_gsc.h new file mode 100644 index 0000000..662f6c1 --- /dev/null +++ b/drivers/parport/parport_gsc.h @@ -0,0 +1,222 @@ +/* + * Low-level parallel-support for PC-style hardware integrated in the + * LASI-Controller (on GSC-Bus) for HP-PARISC Workstations + * + * (C) 1999-2001 by Helge Deller <deller@gmx.de> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * based on parport_pc.c by + * Grant Guenther <grant@torque.net> + * Phil Blundell <Philip.Blundell@pobox.com> + * Tim Waugh <tim@cyberelk.demon.co.uk> + * Jose Renau <renau@acm.org> + * David Campbell <campbell@torque.net> + * Andrea Arcangeli + */ + +#ifndef __DRIVERS_PARPORT_PARPORT_GSC_H +#define __DRIVERS_PARPORT_PARPORT_GSC_H + +#include <asm/io.h> +#include <linux/delay.h> + +#undef DEBUG_PARPORT /* undefine for production */ +#define DELAY_TIME 0 + +#if DELAY_TIME == 0 +#define parport_readb gsc_readb +#define parport_writeb gsc_writeb +#else +static __inline__ unsigned char parport_readb( unsigned long port ) +{ + udelay(DELAY_TIME); + return gsc_readb(port); +} + +static __inline__ void parport_writeb( unsigned char value, unsigned long port ) +{ + gsc_writeb(value,port); + udelay(DELAY_TIME); +} +#endif + +/* --- register definitions ------------------------------- */ + +#define EPPDATA(p) ((p)->base + 0x4) +#define EPPADDR(p) ((p)->base + 0x3) +#define CONTROL(p) ((p)->base + 0x2) +#define STATUS(p) ((p)->base + 0x1) +#define DATA(p) ((p)->base + 0x0) + +struct parport_gsc_private { + /* Contents of CTR. */ + unsigned char ctr; + + /* Bitmask of writable CTR bits. */ + unsigned char ctr_writable; + + /* Number of bytes per portword. */ + int pword; + + /* Not used yet. */ + int readIntrThreshold; + int writeIntrThreshold; + + /* buffer suitable for DMA, if DMA enabled */ + char *dma_buf; + dma_addr_t dma_handle; + struct pci_dev *dev; +}; + +static inline void parport_gsc_write_data(struct parport *p, unsigned char d) +{ +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG "parport_gsc_write_data(%p,0x%02x)\n", p, d); +#endif + parport_writeb(d, DATA(p)); +} + +static inline unsigned char parport_gsc_read_data(struct parport *p) +{ + unsigned char val = parport_readb (DATA (p)); +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG "parport_gsc_read_data(%p) = 0x%02x\n", + p, val); +#endif + return val; +} + +/* __parport_gsc_frob_control differs from parport_gsc_frob_control in that + * it doesn't do any extra masking. */ +static inline unsigned char __parport_gsc_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + struct parport_gsc_private *priv = p->physport->private_data; + unsigned char ctr = priv->ctr; +#ifdef DEBUG_PARPORT + printk (KERN_DEBUG + "__parport_gsc_frob_control(%02x,%02x): %02x -> %02x\n", + mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable); +#endif + ctr = (ctr & ~mask) ^ val; + ctr &= priv->ctr_writable; /* only write writable bits. */ + parport_writeb (ctr, CONTROL (p)); + priv->ctr = ctr; /* Update soft copy */ + return ctr; +} + +static inline void parport_gsc_data_reverse(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x20, 0x20); +} + +static inline void parport_gsc_data_forward(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x20, 0x00); +} + +static inline void parport_gsc_write_control(struct parport *p, + unsigned char d) +{ + const unsigned char wm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + + /* Take this out when drivers have adapted to newer interface. */ + if (d & 0x20) { + printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n", + p->name, p->cad->name); + parport_gsc_data_reverse (p); + } + + __parport_gsc_frob_control (p, wm, d & wm); +} + +static inline unsigned char parport_gsc_read_control(struct parport *p) +{ + const unsigned char rm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + const struct parport_gsc_private *priv = p->physport->private_data; + return priv->ctr & rm; /* Use soft copy */ +} + +static inline unsigned char parport_gsc_frob_control(struct parport *p, + unsigned char mask, + unsigned char val) +{ + const unsigned char wm = (PARPORT_CONTROL_STROBE | + PARPORT_CONTROL_AUTOFD | + PARPORT_CONTROL_INIT | + PARPORT_CONTROL_SELECT); + + /* Take this out when drivers have adapted to newer interface. */ + if (mask & 0x20) { + printk (KERN_DEBUG "%s (%s): use data_%s for this!\n", + p->name, p->cad->name, + (val & 0x20) ? "reverse" : "forward"); + if (val & 0x20) + parport_gsc_data_reverse (p); + else + parport_gsc_data_forward (p); + } + + /* Restrict mask and val to control lines. */ + mask &= wm; + val &= wm; + + return __parport_gsc_frob_control (p, mask, val); +} + +static inline unsigned char parport_gsc_read_status(struct parport *p) +{ + return parport_readb (STATUS(p)); +} + +static inline void parport_gsc_disable_irq(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x10, 0x00); +} + +static inline void parport_gsc_enable_irq(struct parport *p) +{ + __parport_gsc_frob_control (p, 0x10, 0x10); +} + +extern void parport_gsc_release_resources(struct parport *p); + +extern int parport_gsc_claim_resources(struct parport *p); + +extern void parport_gsc_init_state(struct pardevice *, struct parport_state *s); + +extern void parport_gsc_save_state(struct parport *p, struct parport_state *s); + +extern void parport_gsc_restore_state(struct parport *p, struct parport_state *s); + +extern void parport_gsc_inc_use_count(void); + +extern void parport_gsc_dec_use_count(void); + +extern struct parport *parport_gsc_probe_port(unsigned long base, + unsigned long base_hi, + int irq, int dma, + struct pci_dev *dev); + +#endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */ |
