/* * 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 * * * 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 * Phil Blundell * Tim Waugh * Jose Renau * David Campbell * Andrea Arcangeli */ #ifndef __DRIVERS_PARPORT_PARPORT_GSC_H #define __DRIVERS_PARPORT_PARPORT_GSC_H #include #include #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 parisc_device *padev); #endif /* __DRIVERS_PARPORT_PARPORT_GSC_H */