1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __LINUX_PARPORT_PC_H 3 #define __LINUX_PARPORT_PC_H 4 5 #include <asm/io.h> 6 7 /* --- register definitions ------------------------------- */ 8 9 #define ECONTROL(p) ((p)->base_hi + 0x2) 10 #define CONFIGB(p) ((p)->base_hi + 0x1) 11 #define CONFIGA(p) ((p)->base_hi + 0x0) 12 #define FIFO(p) ((p)->base_hi + 0x0) 13 #define EPPDATA(p) ((p)->base + 0x4) 14 #define EPPADDR(p) ((p)->base + 0x3) 15 #define CONTROL(p) ((p)->base + 0x2) 16 #define STATUS(p) ((p)->base + 0x1) 17 #define DATA(p) ((p)->base + 0x0) 18 19 struct parport_pc_private { 20 /* Contents of CTR. */ 21 unsigned char ctr; 22 23 /* Bitmask of writable CTR bits. */ 24 unsigned char ctr_writable; 25 26 /* Whether or not there's an ECR. */ 27 int ecr; 28 29 /* Number of PWords that FIFO will hold. */ 30 int fifo_depth; 31 32 /* Number of bytes per portword. */ 33 int pword; 34 35 /* Not used yet. */ 36 int readIntrThreshold; 37 int writeIntrThreshold; 38 39 /* buffer suitable for DMA, if DMA enabled */ 40 char *dma_buf; 41 dma_addr_t dma_handle; 42 struct list_head list; 43 struct parport *port; 44 }; 45 46 struct parport_pc_via_data 47 { 48 /* ISA PnP IRQ routing register 1 */ 49 u8 via_pci_parport_irq_reg; 50 /* ISA PnP DMA request routing register */ 51 u8 via_pci_parport_dma_reg; 52 /* Register and value to enable SuperIO configuration access */ 53 u8 via_pci_superio_config_reg; 54 u8 via_pci_superio_config_data; 55 /* SuperIO function register number */ 56 u8 viacfg_function; 57 /* parallel port control register number */ 58 u8 viacfg_parport_control; 59 /* Parallel port base address register */ 60 u8 viacfg_parport_base; 61 }; 62 63 static __inline__ void parport_pc_write_data(struct parport *p, unsigned char d) 64 { 65 #ifdef DEBUG_PARPORT 66 printk (KERN_DEBUG "parport_pc_write_data(%p,0x%02x)\n", p, d); 67 #endif 68 outb(d, DATA(p)); 69 } 70 71 static __inline__ unsigned char parport_pc_read_data(struct parport *p) 72 { 73 unsigned char val = inb (DATA (p)); 74 #ifdef DEBUG_PARPORT 75 printk (KERN_DEBUG "parport_pc_read_data(%p) = 0x%02x\n", 76 p, val); 77 #endif 78 return val; 79 } 80 81 #ifdef DEBUG_PARPORT 82 static inline void dump_parport_state (char *str, struct parport *p) 83 { 84 /* here's hoping that reading these ports won't side-effect anything underneath */ 85 unsigned char ecr = inb (ECONTROL (p)); 86 unsigned char dcr = inb (CONTROL (p)); 87 unsigned char dsr = inb (STATUS (p)); 88 static const char *const ecr_modes[] = {"SPP", "PS2", "PPFIFO", "ECP", "xXx", "yYy", "TST", "CFG"}; 89 const struct parport_pc_private *priv = p->physport->private_data; 90 int i; 91 92 printk (KERN_DEBUG "*** parport state (%s): ecr=[%s", str, ecr_modes[(ecr & 0xe0) >> 5]); 93 if (ecr & 0x10) printk (",nErrIntrEn"); 94 if (ecr & 0x08) printk (",dmaEn"); 95 if (ecr & 0x04) printk (",serviceIntr"); 96 if (ecr & 0x02) printk (",f_full"); 97 if (ecr & 0x01) printk (",f_empty"); 98 for (i=0; i<2; i++) { 99 printk ("] dcr(%s)=[", i ? "soft" : "hard"); 100 dcr = i ? priv->ctr : inb (CONTROL (p)); 101 102 if (dcr & 0x20) { 103 printk ("rev"); 104 } else { 105 printk ("fwd"); 106 } 107 if (dcr & 0x10) printk (",ackIntEn"); 108 if (!(dcr & 0x08)) printk (",N-SELECT-IN"); 109 if (dcr & 0x04) printk (",N-INIT"); 110 if (!(dcr & 0x02)) printk (",N-AUTOFD"); 111 if (!(dcr & 0x01)) printk (",N-STROBE"); 112 } 113 printk ("] dsr=["); 114 if (!(dsr & 0x80)) printk ("BUSY"); 115 if (dsr & 0x40) printk (",N-ACK"); 116 if (dsr & 0x20) printk (",PERROR"); 117 if (dsr & 0x10) printk (",SELECT"); 118 if (dsr & 0x08) printk (",N-FAULT"); 119 printk ("]\n"); 120 return; 121 } 122 #else /* !DEBUG_PARPORT */ 123 #define dump_parport_state(args...) 124 #endif /* !DEBUG_PARPORT */ 125 126 /* __parport_pc_frob_control differs from parport_pc_frob_control in that 127 * it doesn't do any extra masking. */ 128 static __inline__ unsigned char __parport_pc_frob_control (struct parport *p, 129 unsigned char mask, 130 unsigned char val) 131 { 132 struct parport_pc_private *priv = p->physport->private_data; 133 unsigned char ctr = priv->ctr; 134 #ifdef DEBUG_PARPORT 135 printk (KERN_DEBUG 136 "__parport_pc_frob_control(%02x,%02x): %02x -> %02x\n", 137 mask, val, ctr, ((ctr & ~mask) ^ val) & priv->ctr_writable); 138 #endif 139 ctr = (ctr & ~mask) ^ val; 140 ctr &= priv->ctr_writable; /* only write writable bits. */ 141 outb (ctr, CONTROL (p)); 142 priv->ctr = ctr; /* Update soft copy */ 143 return ctr; 144 } 145 146 static __inline__ void parport_pc_data_reverse (struct parport *p) 147 { 148 __parport_pc_frob_control (p, 0x20, 0x20); 149 } 150 151 static __inline__ void parport_pc_data_forward (struct parport *p) 152 { 153 __parport_pc_frob_control (p, 0x20, 0x00); 154 } 155 156 static __inline__ void parport_pc_write_control (struct parport *p, 157 unsigned char d) 158 { 159 const unsigned char wm = (PARPORT_CONTROL_STROBE | 160 PARPORT_CONTROL_AUTOFD | 161 PARPORT_CONTROL_INIT | 162 PARPORT_CONTROL_SELECT); 163 164 /* Take this out when drivers have adapted to newer interface. */ 165 if (d & 0x20) { 166 printk (KERN_DEBUG "%s (%s): use data_reverse for this!\n", 167 p->name, p->cad->name); 168 parport_pc_data_reverse (p); 169 } 170 171 __parport_pc_frob_control (p, wm, d & wm); 172 } 173 174 static __inline__ unsigned char parport_pc_read_control(struct parport *p) 175 { 176 const unsigned char rm = (PARPORT_CONTROL_STROBE | 177 PARPORT_CONTROL_AUTOFD | 178 PARPORT_CONTROL_INIT | 179 PARPORT_CONTROL_SELECT); 180 const struct parport_pc_private *priv = p->physport->private_data; 181 return priv->ctr & rm; /* Use soft copy */ 182 } 183 184 static __inline__ unsigned char parport_pc_frob_control (struct parport *p, 185 unsigned char mask, 186 unsigned char val) 187 { 188 const unsigned char wm = (PARPORT_CONTROL_STROBE | 189 PARPORT_CONTROL_AUTOFD | 190 PARPORT_CONTROL_INIT | 191 PARPORT_CONTROL_SELECT); 192 193 /* Take this out when drivers have adapted to newer interface. */ 194 if (mask & 0x20) { 195 printk (KERN_DEBUG "%s (%s): use data_%s for this!\n", 196 p->name, p->cad->name, 197 (val & 0x20) ? "reverse" : "forward"); 198 if (val & 0x20) 199 parport_pc_data_reverse (p); 200 else 201 parport_pc_data_forward (p); 202 } 203 204 /* Restrict mask and val to control lines. */ 205 mask &= wm; 206 val &= wm; 207 208 return __parport_pc_frob_control (p, mask, val); 209 } 210 211 static __inline__ unsigned char parport_pc_read_status(struct parport *p) 212 { 213 return inb(STATUS(p)); 214 } 215 216 217 static __inline__ void parport_pc_disable_irq(struct parport *p) 218 { 219 __parport_pc_frob_control (p, 0x10, 0x00); 220 } 221 222 static __inline__ void parport_pc_enable_irq(struct parport *p) 223 { 224 __parport_pc_frob_control (p, 0x10, 0x10); 225 } 226 227 extern void parport_pc_release_resources(struct parport *p); 228 229 extern int parport_pc_claim_resources(struct parport *p); 230 231 /* PCMCIA code will want to get us to look at a port. Provide a mechanism. */ 232 extern struct parport *parport_pc_probe_port(unsigned long base, 233 unsigned long base_hi, 234 int irq, int dma, 235 struct device *dev, 236 int irqflags); 237 extern void parport_pc_unregister_port(struct parport *p); 238 239 #endif 240