1 #ifndef __LINUX_PARPORT_PC_H 2 #define __LINUX_PARPORT_PC_H 3 4 #include <asm/io.h> 5 6 /* --- register definitions ------------------------------- */ 7 8 #define ECONTROL(p) ((p)->base_hi + 0x2) 9 #define CONFIGB(p) ((p)->base_hi + 0x1) 10 #define CONFIGA(p) ((p)->base_hi + 0x0) 11 #define FIFO(p) ((p)->base_hi + 0x0) 12 #define EPPDATA(p) ((p)->base + 0x4) 13 #define EPPADDR(p) ((p)->base + 0x3) 14 #define CONTROL(p) ((p)->base + 0x2) 15 #define STATUS(p) ((p)->base + 0x1) 16 #define DATA(p) ((p)->base + 0x0) 17 18 struct parport_pc_private { 19 /* Contents of CTR. */ 20 unsigned char ctr; 21 22 /* Bitmask of writable CTR bits. */ 23 unsigned char ctr_writable; 24 25 /* Whether or not there's an ECR. */ 26 int ecr; 27 28 /* Number of PWords that FIFO will hold. */ 29 int fifo_depth; 30 31 /* Number of bytes per portword. */ 32 int pword; 33 34 /* Not used yet. */ 35 int readIntrThreshold; 36 int writeIntrThreshold; 37 38 /* buffer suitable for DMA, if DMA enabled */ 39 char *dma_buf; 40 dma_addr_t dma_handle; 41 struct list_head list; 42 struct parport *port; 43 }; 44 45 struct parport_pc_via_data 46 { 47 /* ISA PnP IRQ routing register 1 */ 48 u8 via_pci_parport_irq_reg; 49 /* ISA PnP DMA request routing register */ 50 u8 via_pci_parport_dma_reg; 51 /* Register and value to enable SuperIO configuration access */ 52 u8 via_pci_superio_config_reg; 53 u8 via_pci_superio_config_data; 54 /* SuperIO function register number */ 55 u8 viacfg_function; 56 /* parallel port control register number */ 57 u8 viacfg_parport_control; 58 /* Parallel port base address register */ 59 u8 viacfg_parport_base; 60 }; 61 62 static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d) 63 { 64 #ifdef DEBUG_PARPORT 65 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d); 66 #endif 67 outb(d, DATA(p)); 68 } 69 70 static __inline__ unsigned char parport_pc_read_data(struct parport *p) 71 { 72 unsigned char val = inb (DATA (p)); 73 #ifdef DEBUG_PARPORT 74 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n", 75 p, val); 76 #endif 77 return val; 78 } 79 80 #ifdef DEBUG_PARPORT 81 static inline void dump_parport_state (char *str, struct parport *p) 82 { 83 /* here's hoping that reading these ports won't side-effect anything underneath */ 84 unsigned char ecr = inb (ECONTROL (p)); 85 unsigned char dcr = inb (CONTROL (p)); 86 unsigned char dsr = inb (STATUS (p)); 87 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"}; 88 const struct parport_pc_private *priv = p->physport->private_data; 89 int i; 90 91 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]); 92 if (ecr & 0x10) printk (",nErrIntrEn"); 93 if (ecr & 0x08) printk (",dmaEn"); 94 if (ecr & 0x04) printk (",serviceIntr"); 95 if (ecr & 0x02) printk (",f_full"); 96 if (ecr & 0x01) printk (",f_empty"); 97 for (i=0; i<2; i++) { 98 printk ("] dcr(%s)=[", i ? "soft" : "hard"); 99 dcr = i ? priv->ctr : inb (CONTROL (p)); 100 101 if (dcr & 0x20) { 102 printk ("rev"); 103 } else { 104 printk ("fwd"); 105 } 106 if (dcr & 0x10) printk (",ackIntEn"); 107 if (!(dcr & 0x08)) printk (",N-SELECT-IN"); 108 if (dcr & 0x04) printk (",N-INIT"); 109 if (!(dcr & 0x02)) printk (",N-AUTOFD"); 110 if (!(dcr & 0x01)) printk (",N-STROBE"); 111 } 112 printk ("] dsr=["); 113 if (!(dsr & 0x80)) printk ("BUSY"); 114 if (dsr & 0x40) printk (",N-ACK"); 115 if (dsr & 0x20) printk (",PERROR"); 116 if (dsr & 0x10) printk (",SELECT"); 117 if (dsr & 0x08) printk (",N-FAULT"); 118 printk ("]\n"); 119 return; 120 } 121 #else /* !DEBUG_PARPORT */ 122 #define dump_parport_state(args...) 123 #endif /* !DEBUG_PARPORT */ 124 125 /* __parport_pc_frob_control differs from parport_pc_frob_control in that 126 * it doesn't do any extra masking. */ 127 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p, 128 unsigned char mask, 129 unsigned char val) 130 { 131 struct parport_pc_private *priv = p->physport->private_data; 132 unsigned char ctr = priv->ctr; 133 #ifdef DEBUG_PARPORT 134 printk (KERN_DEBUG 135 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n", 136 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable); 137 #endif 138 ctr = (ctr & ~mask) ^ val; 139 ctr &= priv->ctr_writable; /* only write writable bits. */ 140 outb (ctr, CONTROL (p)); 141 priv->ctr = ctr; /* Update soft copy */ 142 return ctr; 143 } 144 145 static __inline__ void parport_pc_data_reverse (struct parport *p) 146 { 147 __parport_pc_frob_control (p, 0x20, 0x20); 148 } 149 150 static __inline__ void parport_pc_data_forward (struct parport *p) 151 { 152 __parport_pc_frob_control (p, 0x20, 0x00); 153 } 154 155 static __inline__ void parport_pc_write_control (struct parport *p, 156 unsigned char d) 157 { 158 const unsigned char wm = (PARPORT_CONTROL_STROBE | 159 PARPORT_CONTROL_AUTOFD | 160 PARPORT_CONTROL_INIT | 161 PARPORT_CONTROL_SELECT); 162 163 /* Take this out when drivers have adapted to newer interface. */ 164 if (d & 0x20) { 165 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n", 166 p->name, p->cad->name); 167 parport_pc_data_reverse (p); 168 } 169 170 __parport_pc_frob_control (p, wm, d & wm); 171 } 172 173 static __inline__ unsigned char parport_pc_read_control(struct parport *p) 174 { 175 const unsigned char rm = (PARPORT_CONTROL_STROBE | 176 PARPORT_CONTROL_AUTOFD | 177 PARPORT_CONTROL_INIT | 178 PARPORT_CONTROL_SELECT); 179 const struct parport_pc_private *priv = p->physport->private_data; 180 return priv->ctr & rm; /* Use soft copy */ 181 } 182 183 static __inline__ unsigned char parport_pc_frob_control (struct parport *p, 184 unsigned char mask, 185 unsigned char val) 186 { 187 const unsigned char wm = (PARPORT_CONTROL_STROBE | 188 PARPORT_CONTROL_AUTOFD | 189 PARPORT_CONTROL_INIT | 190 PARPORT_CONTROL_SELECT); 191 192 /* Take this out when drivers have adapted to newer interface. */ 193 if (mask & 0x20) { 194 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n", 195 p->name, p->cad->name, 196 (val & 0x20) ? "reverse" : "forward"); 197 if (val & 0x20) 198 parport_pc_data_reverse (p); 199 else 200 parport_pc_data_forward (p); 201 } 202 203 /* Restrict mask and val to control lines. */ 204 mask &= wm; 205 val &= wm; 206 207 return __parport_pc_frob_control (p, mask, val); 208 } 209 210 static __inline__ unsigned char parport_pc_read_status(struct parport *p) 211 { 212 return inb(STATUS(p)); 213 } 214 215 216 static __inline__ void parport_pc_disable_irq(struct parport *p) 217 { 218 __parport_pc_frob_control (p, 0x10, 0x00); 219 } 220 221 static __inline__ void parport_pc_enable_irq(struct parport *p) 222 { 223 __parport_pc_frob_control (p, 0x10, 0x10); 224 } 225 226 extern void parport_pc_release_resources(struct parport *p); 227 228 extern int parport_pc_claim_resources(struct parport *p); 229 230 /* PCMCIA code will want to get us to look at a port. Provide a mechanism. */ 231 extern struct parport *parport_pc_probe_port(unsigned long base, 232 unsigned long base_hi, 233 int irq, int dma, 234 struct device *dev, 235 int irqflags); 236 extern void parport_pc_unregister_port(struct parport *p); 237 238 #endif 239