David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 1 | /* parport_sunbpp.c: Parallel-port routines for SBUS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * |
| 3 | * Author: Derrick J. Brashear <shadow@dementia.org> |
| 4 | * |
| 5 | * based on work by: |
| 6 | * Phil Blundell <philb@gnu.org> |
| 7 | * Tim Waugh <tim@cyberelk.demon.co.uk> |
| 8 | * Jose Renau <renau@acm.org> |
| 9 | * David Campbell <campbell@tirian.che.curtin.edu.au> |
| 10 | * Grant Guenther <grant@torque.net> |
| 11 | * Eddie C. Dost <ecd@skynet.be> |
| 12 | * Stephen Williams (steve@icarus.com) |
| 13 | * Gus Baldauf (gbaldauf@ix.netcom.com) |
| 14 | * Peter Zaitcev |
| 15 | * Tom Dyas |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 16 | * |
| 17 | * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net> |
| 18 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | */ |
| 20 | |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/module.h> |
| 23 | #include <linux/delay.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/ioport.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/slab.h> |
| 28 | #include <linux/init.h> |
| 29 | |
| 30 | #include <linux/parport.h> |
| 31 | |
| 32 | #include <asm/ptrace.h> |
| 33 | #include <linux/interrupt.h> |
| 34 | |
| 35 | #include <asm/io.h> |
| 36 | #include <asm/oplib.h> /* OpenProm Library */ |
| 37 | #include <asm/sbus.h> |
| 38 | #include <asm/dma.h> /* BPP uses LSI 64854 for DMA */ |
| 39 | #include <asm/irq.h> |
| 40 | #include <asm/sunbpp.h> |
| 41 | |
| 42 | #undef __SUNBPP_DEBUG |
| 43 | #ifdef __SUNBPP_DEBUG |
| 44 | #define dprintk(x) printk x |
| 45 | #else |
| 46 | #define dprintk(x) |
| 47 | #endif |
| 48 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame^] | 49 | static irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | { |
| 51 | parport_generic_irq(irq, (struct parport *) dev_id, regs); |
| 52 | return IRQ_HANDLED; |
| 53 | } |
| 54 | |
| 55 | static void parport_sunbpp_disable_irq(struct parport *p) |
| 56 | { |
| 57 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 58 | u32 tmp; |
| 59 | |
| 60 | tmp = sbus_readl(®s->p_csr); |
| 61 | tmp &= ~DMA_INT_ENAB; |
| 62 | sbus_writel(tmp, ®s->p_csr); |
| 63 | } |
| 64 | |
| 65 | static void parport_sunbpp_enable_irq(struct parport *p) |
| 66 | { |
| 67 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 68 | u32 tmp; |
| 69 | |
| 70 | tmp = sbus_readl(®s->p_csr); |
| 71 | tmp |= DMA_INT_ENAB; |
| 72 | sbus_writel(tmp, ®s->p_csr); |
| 73 | } |
| 74 | |
| 75 | static void parport_sunbpp_write_data(struct parport *p, unsigned char d) |
| 76 | { |
| 77 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 78 | |
| 79 | sbus_writeb(d, ®s->p_dr); |
| 80 | dprintk((KERN_DEBUG "wrote 0x%x\n", d)); |
| 81 | } |
| 82 | |
| 83 | static unsigned char parport_sunbpp_read_data(struct parport *p) |
| 84 | { |
| 85 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 86 | |
| 87 | return sbus_readb(®s->p_dr); |
| 88 | } |
| 89 | |
| 90 | #if 0 |
| 91 | static void control_pc_to_sunbpp(struct parport *p, unsigned char status) |
| 92 | { |
| 93 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 94 | unsigned char value_tcr = sbus_readb(®s->p_tcr); |
| 95 | unsigned char value_or = sbus_readb(®s->p_or); |
| 96 | |
| 97 | if (status & PARPORT_CONTROL_STROBE) |
| 98 | value_tcr |= P_TCR_DS; |
| 99 | if (status & PARPORT_CONTROL_AUTOFD) |
| 100 | value_or |= P_OR_AFXN; |
| 101 | if (status & PARPORT_CONTROL_INIT) |
| 102 | value_or |= P_OR_INIT; |
| 103 | if (status & PARPORT_CONTROL_SELECT) |
| 104 | value_or |= P_OR_SLCT_IN; |
| 105 | |
| 106 | sbus_writeb(value_or, ®s->p_or); |
| 107 | sbus_writeb(value_tcr, ®s->p_tcr); |
| 108 | } |
| 109 | #endif |
| 110 | |
| 111 | static unsigned char status_sunbpp_to_pc(struct parport *p) |
| 112 | { |
| 113 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 114 | unsigned char bits = 0; |
| 115 | unsigned char value_tcr = sbus_readb(®s->p_tcr); |
| 116 | unsigned char value_ir = sbus_readb(®s->p_ir); |
| 117 | |
| 118 | if (!(value_ir & P_IR_ERR)) |
| 119 | bits |= PARPORT_STATUS_ERROR; |
| 120 | if (!(value_ir & P_IR_SLCT)) |
| 121 | bits |= PARPORT_STATUS_SELECT; |
| 122 | if (!(value_ir & P_IR_PE)) |
| 123 | bits |= PARPORT_STATUS_PAPEROUT; |
| 124 | if (value_tcr & P_TCR_ACK) |
| 125 | bits |= PARPORT_STATUS_ACK; |
| 126 | if (!(value_tcr & P_TCR_BUSY)) |
| 127 | bits |= PARPORT_STATUS_BUSY; |
| 128 | |
| 129 | dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", regs->p_tcr, regs->p_ir)); |
| 130 | dprintk((KERN_DEBUG "read status 0x%x\n", bits)); |
| 131 | return bits; |
| 132 | } |
| 133 | |
| 134 | static unsigned char control_sunbpp_to_pc(struct parport *p) |
| 135 | { |
| 136 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 137 | unsigned char bits = 0; |
| 138 | unsigned char value_tcr = sbus_readb(®s->p_tcr); |
| 139 | unsigned char value_or = sbus_readb(®s->p_or); |
| 140 | |
| 141 | if (!(value_tcr & P_TCR_DS)) |
| 142 | bits |= PARPORT_CONTROL_STROBE; |
| 143 | if (!(value_or & P_OR_AFXN)) |
| 144 | bits |= PARPORT_CONTROL_AUTOFD; |
| 145 | if (!(value_or & P_OR_INIT)) |
| 146 | bits |= PARPORT_CONTROL_INIT; |
| 147 | if (value_or & P_OR_SLCT_IN) |
| 148 | bits |= PARPORT_CONTROL_SELECT; |
| 149 | |
| 150 | dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); |
| 151 | dprintk((KERN_DEBUG "read control 0x%x\n", bits)); |
| 152 | return bits; |
| 153 | } |
| 154 | |
| 155 | static unsigned char parport_sunbpp_read_control(struct parport *p) |
| 156 | { |
| 157 | return control_sunbpp_to_pc(p); |
| 158 | } |
| 159 | |
| 160 | static unsigned char parport_sunbpp_frob_control(struct parport *p, |
| 161 | unsigned char mask, |
| 162 | unsigned char val) |
| 163 | { |
| 164 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 165 | unsigned char value_tcr = sbus_readb(®s->p_tcr); |
| 166 | unsigned char value_or = sbus_readb(®s->p_or); |
| 167 | |
| 168 | dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); |
| 169 | if (mask & PARPORT_CONTROL_STROBE) { |
| 170 | if (val & PARPORT_CONTROL_STROBE) { |
| 171 | value_tcr &= ~P_TCR_DS; |
| 172 | } else { |
| 173 | value_tcr |= P_TCR_DS; |
| 174 | } |
| 175 | } |
| 176 | if (mask & PARPORT_CONTROL_AUTOFD) { |
| 177 | if (val & PARPORT_CONTROL_AUTOFD) { |
| 178 | value_or &= ~P_OR_AFXN; |
| 179 | } else { |
| 180 | value_or |= P_OR_AFXN; |
| 181 | } |
| 182 | } |
| 183 | if (mask & PARPORT_CONTROL_INIT) { |
| 184 | if (val & PARPORT_CONTROL_INIT) { |
| 185 | value_or &= ~P_OR_INIT; |
| 186 | } else { |
| 187 | value_or |= P_OR_INIT; |
| 188 | } |
| 189 | } |
| 190 | if (mask & PARPORT_CONTROL_SELECT) { |
| 191 | if (val & PARPORT_CONTROL_SELECT) { |
| 192 | value_or |= P_OR_SLCT_IN; |
| 193 | } else { |
| 194 | value_or &= ~P_OR_SLCT_IN; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | sbus_writeb(value_or, ®s->p_or); |
| 199 | sbus_writeb(value_tcr, ®s->p_tcr); |
| 200 | dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); |
| 201 | return parport_sunbpp_read_control(p); |
| 202 | } |
| 203 | |
| 204 | static void parport_sunbpp_write_control(struct parport *p, unsigned char d) |
| 205 | { |
| 206 | const unsigned char wm = (PARPORT_CONTROL_STROBE | |
| 207 | PARPORT_CONTROL_AUTOFD | |
| 208 | PARPORT_CONTROL_INIT | |
| 209 | PARPORT_CONTROL_SELECT); |
| 210 | |
| 211 | parport_sunbpp_frob_control (p, wm, d & wm); |
| 212 | } |
| 213 | |
| 214 | static unsigned char parport_sunbpp_read_status(struct parport *p) |
| 215 | { |
| 216 | return status_sunbpp_to_pc(p); |
| 217 | } |
| 218 | |
| 219 | static void parport_sunbpp_data_forward (struct parport *p) |
| 220 | { |
| 221 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 222 | unsigned char value_tcr = sbus_readb(®s->p_tcr); |
| 223 | |
| 224 | dprintk((KERN_DEBUG "forward\n")); |
| 225 | value_tcr &= ~P_TCR_DIR; |
| 226 | sbus_writeb(value_tcr, ®s->p_tcr); |
| 227 | } |
| 228 | |
| 229 | static void parport_sunbpp_data_reverse (struct parport *p) |
| 230 | { |
| 231 | struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; |
| 232 | u8 val = sbus_readb(®s->p_tcr); |
| 233 | |
| 234 | dprintk((KERN_DEBUG "reverse\n")); |
| 235 | val |= P_TCR_DIR; |
| 236 | sbus_writeb(val, ®s->p_tcr); |
| 237 | } |
| 238 | |
| 239 | static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s) |
| 240 | { |
| 241 | s->u.pc.ctr = 0xc; |
| 242 | s->u.pc.ecr = 0x0; |
| 243 | } |
| 244 | |
| 245 | static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s) |
| 246 | { |
| 247 | s->u.pc.ctr = parport_sunbpp_read_control(p); |
| 248 | } |
| 249 | |
| 250 | static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s) |
| 251 | { |
| 252 | parport_sunbpp_write_control(p, s->u.pc.ctr); |
| 253 | } |
| 254 | |
| 255 | static struct parport_operations parport_sunbpp_ops = |
| 256 | { |
| 257 | .write_data = parport_sunbpp_write_data, |
| 258 | .read_data = parport_sunbpp_read_data, |
| 259 | |
| 260 | .write_control = parport_sunbpp_write_control, |
| 261 | .read_control = parport_sunbpp_read_control, |
| 262 | .frob_control = parport_sunbpp_frob_control, |
| 263 | |
| 264 | .read_status = parport_sunbpp_read_status, |
| 265 | |
| 266 | .enable_irq = parport_sunbpp_enable_irq, |
| 267 | .disable_irq = parport_sunbpp_disable_irq, |
| 268 | |
| 269 | .data_forward = parport_sunbpp_data_forward, |
| 270 | .data_reverse = parport_sunbpp_data_reverse, |
| 271 | |
| 272 | .init_state = parport_sunbpp_init_state, |
| 273 | .save_state = parport_sunbpp_save_state, |
| 274 | .restore_state = parport_sunbpp_restore_state, |
| 275 | |
| 276 | .epp_write_data = parport_ieee1284_epp_write_data, |
| 277 | .epp_read_data = parport_ieee1284_epp_read_data, |
| 278 | .epp_write_addr = parport_ieee1284_epp_write_addr, |
| 279 | .epp_read_addr = parport_ieee1284_epp_read_addr, |
| 280 | |
| 281 | .ecp_write_data = parport_ieee1284_ecp_write_data, |
| 282 | .ecp_read_data = parport_ieee1284_ecp_read_data, |
| 283 | .ecp_write_addr = parport_ieee1284_ecp_write_addr, |
| 284 | |
| 285 | .compat_write_data = parport_ieee1284_write_compat, |
| 286 | .nibble_read_data = parport_ieee1284_read_nibble, |
| 287 | .byte_read_data = parport_ieee1284_read_byte, |
| 288 | |
| 289 | .owner = THIS_MODULE, |
| 290 | }; |
| 291 | |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 292 | static int __devinit init_one_port(struct sbus_dev *sdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
| 294 | struct parport *p; |
| 295 | /* at least in theory there may be a "we don't dma" case */ |
| 296 | struct parport_operations *ops; |
| 297 | void __iomem *base; |
| 298 | int irq, dma, err = 0, size; |
| 299 | struct bpp_regs __iomem *regs; |
| 300 | unsigned char value_tcr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | |
| 302 | irq = sdev->irqs[0]; |
| 303 | base = sbus_ioremap(&sdev->resource[0], 0, |
| 304 | sdev->reg_addrs[0].reg_size, |
| 305 | "sunbpp"); |
| 306 | if (!base) |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 307 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
| 309 | size = sdev->reg_addrs[0].reg_size; |
| 310 | dma = PARPORT_DMA_NONE; |
| 311 | |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 312 | ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | if (!ops) |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 314 | goto out_unmap; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations)); |
| 317 | |
| 318 | dprintk(("register_port\n")); |
| 319 | if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 320 | goto out_free_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
| 322 | p->size = size; |
| 323 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | if ((err = request_irq(p->irq, parport_sunbpp_interrupt, |
Thomas Gleixner | dace145 | 2006-07-01 19:29:38 -0700 | [diff] [blame] | 325 | IRQF_SHARED, p->name, p)) != 0) { |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 326 | goto out_put_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | parport_sunbpp_enable_irq(p); |
| 330 | |
| 331 | regs = (struct bpp_regs __iomem *)p->base; |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 332 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | value_tcr = sbus_readb(®s->p_tcr); |
| 334 | value_tcr &= ~P_TCR_DIR; |
| 335 | sbus_writeb(value_tcr, ®s->p_tcr); |
| 336 | |
| 337 | printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 339 | dev_set_drvdata(&sdev->ofdev.dev, p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 341 | parport_announce_port(p); |
| 342 | |
| 343 | return 0; |
| 344 | |
| 345 | out_put_port: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | parport_put_port(p); |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 347 | |
| 348 | out_free_ops: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | kfree(ops); |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 350 | |
| 351 | out_unmap: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | sbus_iounmap(base, size); |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | return err; |
| 355 | } |
| 356 | |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 357 | static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match) |
| 358 | { |
| 359 | struct sbus_dev *sdev = to_sbus_device(&dev->dev); |
| 360 | |
| 361 | return init_one_port(sdev); |
| 362 | } |
| 363 | |
| 364 | static int __devexit bpp_remove(struct of_device *dev) |
| 365 | { |
| 366 | struct parport *p = dev_get_drvdata(&dev->dev); |
| 367 | struct parport_operations *ops = p->ops; |
| 368 | |
| 369 | parport_remove_port(p); |
| 370 | |
| 371 | if (p->irq != PARPORT_IRQ_NONE) { |
| 372 | parport_sunbpp_disable_irq(p); |
| 373 | free_irq(p->irq, p); |
| 374 | } |
| 375 | |
| 376 | sbus_iounmap((void __iomem *) p->base, p->size); |
| 377 | parport_put_port(p); |
| 378 | kfree(ops); |
| 379 | |
| 380 | dev_set_drvdata(&dev->dev, NULL); |
| 381 | |
| 382 | return 0; |
| 383 | } |
| 384 | |
| 385 | static struct of_device_id bpp_match[] = { |
| 386 | { |
| 387 | .name = "SUNW,bpp", |
| 388 | }, |
| 389 | {}, |
| 390 | }; |
| 391 | |
David S. Miller | 09ec431 | 2006-06-25 00:04:43 -0700 | [diff] [blame] | 392 | MODULE_DEVICE_TABLE(of, bpp_match); |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 393 | |
| 394 | static struct of_platform_driver bpp_sbus_driver = { |
| 395 | .name = "bpp", |
| 396 | .match_table = bpp_match, |
| 397 | .probe = bpp_probe, |
| 398 | .remove = __devexit_p(bpp_remove), |
| 399 | }; |
| 400 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | static int __init parport_sunbpp_init(void) |
| 402 | { |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 403 | return of_register_driver(&bpp_sbus_driver, &sbus_bus_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | } |
| 405 | |
| 406 | static void __exit parport_sunbpp_exit(void) |
| 407 | { |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 408 | of_unregister_driver(&bpp_sbus_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | MODULE_AUTHOR("Derrick J Brashear"); |
| 412 | MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port"); |
| 413 | MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port"); |
David S. Miller | 4f62d15 | 2006-06-23 22:22:13 -0700 | [diff] [blame] | 414 | MODULE_VERSION("2.0"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | MODULE_LICENSE("GPL"); |
| 416 | |
| 417 | module_init(parport_sunbpp_init) |
| 418 | module_exit(parport_sunbpp_exit) |