/* parport_sunbpp.c: Parallel-port routines for SBUS * * Author: Derrick J. Brashear <shadow@dementia.org> * * based on work by: * Phil Blundell <philb@gnu.org> * Tim Waugh <tim@cyberelk.demon.co.uk> * Jose Renau <renau@acm.org> * David Campbell <campbell@tirian.che.curtin.edu.au> * Grant Guenther <grant@torque.net> * Eddie C. Dost <ecd@skynet.be> * Stephen Williams (steve@icarus.com) * Gus Baldauf (gbaldauf@ix.netcom.com) * Peter Zaitcev * Tom Dyas * * Updated to new SBUS device framework: David S. Miller <davem@davemloft.net> * */ #include <linux/string.h> #include <linux/module.h> #include <linux/delay.h> #include <linux/errno.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/parport.h> #include <asm/ptrace.h> #include <linux/interrupt.h> #include <asm/io.h> #include <asm/oplib.h> /* OpenProm Library */ #include <asm/sbus.h> #include <asm/dma.h> /* BPP uses LSI 64854 for DMA */ #include <asm/irq.h> #include <asm/sunbpp.h> #undef __SUNBPP_DEBUG #ifdef __SUNBPP_DEBUG #define dprintk(x) printk x #else #define dprintk(x) #endif static irqreturn_t parport_sunbpp_interrupt(int irq, void *dev_id) { parport_generic_irq(irq, (struct parport *) dev_id); return IRQ_HANDLED; } static void parport_sunbpp_disable_irq(struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; u32 tmp; tmp = sbus_readl(®s->p_csr); tmp &= ~DMA_INT_ENAB; sbus_writel(tmp, ®s->p_csr); } static void parport_sunbpp_enable_irq(struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; u32 tmp; tmp = sbus_readl(®s->p_csr); tmp |= DMA_INT_ENAB; sbus_writel(tmp, ®s->p_csr); } static void parport_sunbpp_write_data(struct parport *p, unsigned char d) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; sbus_writeb(d, ®s->p_dr); dprintk((KERN_DEBUG "wrote 0x%x\n", d)); } static unsigned char parport_sunbpp_read_data(struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; return sbus_readb(®s->p_dr); } #if 0 static void control_pc_to_sunbpp(struct parport *p, unsigned char status) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; unsigned char value_tcr = sbus_readb(®s->p_tcr); unsigned char value_or = sbus_readb(®s->p_or); if (status & PARPORT_CONTROL_STROBE) value_tcr |= P_TCR_DS; if (status & PARPORT_CONTROL_AUTOFD) value_or |= P_OR_AFXN; if (status & PARPORT_CONTROL_INIT) value_or |= P_OR_INIT; if (status & PARPORT_CONTROL_SELECT) value_or |= P_OR_SLCT_IN; sbus_writeb(value_or, ®s->p_or); sbus_writeb(value_tcr, ®s->p_tcr); } #endif static unsigned char status_sunbpp_to_pc(struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; unsigned char bits = 0; unsigned char value_tcr = sbus_readb(®s->p_tcr); unsigned char value_ir = sbus_readb(®s->p_ir); if (!(value_ir & P_IR_ERR)) bits |= PARPORT_STATUS_ERROR; if (!(value_ir & P_IR_SLCT)) bits |= PARPORT_STATUS_SELECT; if (!(value_ir & P_IR_PE)) bits |= PARPORT_STATUS_PAPEROUT; if (value_tcr & P_TCR_ACK) bits |= PARPORT_STATUS_ACK; if (!(value_tcr & P_TCR_BUSY)) bits |= PARPORT_STATUS_BUSY; dprintk((KERN_DEBUG "tcr 0x%x ir 0x%x\n", regs->p_tcr, regs->p_ir)); dprintk((KERN_DEBUG "read status 0x%x\n", bits)); return bits; } static unsigned char control_sunbpp_to_pc(struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; unsigned char bits = 0; unsigned char value_tcr = sbus_readb(®s->p_tcr); unsigned char value_or = sbus_readb(®s->p_or); if (!(value_tcr & P_TCR_DS)) bits |= PARPORT_CONTROL_STROBE; if (!(value_or & P_OR_AFXN)) bits |= PARPORT_CONTROL_AUTOFD; if (!(value_or & P_OR_INIT)) bits |= PARPORT_CONTROL_INIT; if (value_or & P_OR_SLCT_IN) bits |= PARPORT_CONTROL_SELECT; dprintk((KERN_DEBUG "tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); dprintk((KERN_DEBUG "read control 0x%x\n", bits)); return bits; } static unsigned char parport_sunbpp_read_control(struct parport *p) { return control_sunbpp_to_pc(p); } static unsigned char parport_sunbpp_frob_control(struct parport *p, unsigned char mask, unsigned char val) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; unsigned char value_tcr = sbus_readb(®s->p_tcr); unsigned char value_or = sbus_readb(®s->p_or); dprintk((KERN_DEBUG "frob1: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); if (mask & PARPORT_CONTROL_STROBE) { if (val & PARPORT_CONTROL_STROBE) { value_tcr &= ~P_TCR_DS; } else { value_tcr |= P_TCR_DS; } } if (mask & PARPORT_CONTROL_AUTOFD) { if (val & PARPORT_CONTROL_AUTOFD) { value_or &= ~P_OR_AFXN; } else { value_or |= P_OR_AFXN; } } if (mask & PARPORT_CONTROL_INIT) { if (val & PARPORT_CONTROL_INIT) { value_or &= ~P_OR_INIT; } else { value_or |= P_OR_INIT; } } if (mask & PARPORT_CONTROL_SELECT) { if (val & PARPORT_CONTROL_SELECT) { value_or |= P_OR_SLCT_IN; } else { value_or &= ~P_OR_SLCT_IN; } } sbus_writeb(value_or, ®s->p_or); sbus_writeb(value_tcr, ®s->p_tcr); dprintk((KERN_DEBUG "frob2: tcr 0x%x or 0x%x\n", regs->p_tcr, regs->p_or)); return parport_sunbpp_read_control(p); } static void parport_sunbpp_write_control(struct parport *p, unsigned char d) { const unsigned char wm = (PARPORT_CONTROL_STROBE | PARPORT_CONTROL_AUTOFD | PARPORT_CONTROL_INIT | PARPORT_CONTROL_SELECT); parport_sunbpp_frob_control (p, wm, d & wm); } static unsigned char parport_sunbpp_read_status(struct parport *p) { return status_sunbpp_to_pc(p); } static void parport_sunbpp_data_forward (struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; unsigned char value_tcr = sbus_readb(®s->p_tcr); dprintk((KERN_DEBUG "forward\n")); value_tcr &= ~P_TCR_DIR; sbus_writeb(value_tcr, ®s->p_tcr); } static void parport_sunbpp_data_reverse (struct parport *p) { struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base; u8 val = sbus_readb(®s->p_tcr); dprintk((KERN_DEBUG "reverse\n")); val |= P_TCR_DIR; sbus_writeb(val, ®s->p_tcr); } static void parport_sunbpp_init_state(struct pardevice *dev, struct parport_state *s) { s->u.pc.ctr = 0xc; s->u.pc.ecr = 0x0; } static void parport_sunbpp_save_state(struct parport *p, struct parport_state *s) { s->u.pc.ctr = parport_sunbpp_read_control(p); } static void parport_sunbpp_restore_state(struct parport *p, struct parport_state *s) { parport_sunbpp_write_control(p, s->u.pc.ctr); } static struct parport_operations parport_sunbpp_ops = { .write_data = parport_sunbpp_write_data, .read_data = parport_sunbpp_read_data, .write_control = parport_sunbpp_write_control, .read_control = parport_sunbpp_read_control, .frob_control = parport_sunbpp_frob_control, .read_status = parport_sunbpp_read_status, .enable_irq = parport_sunbpp_enable_irq, .disable_irq = parport_sunbpp_disable_irq, .data_forward = parport_sunbpp_data_forward, .data_reverse = parport_sunbpp_data_reverse, .init_state = parport_sunbpp_init_state, .save_state = parport_sunbpp_save_state, .restore_state = parport_sunbpp_restore_state, .epp_write_data = parport_ieee1284_epp_write_data, .epp_read_data = parport_ieee1284_epp_read_data, .epp_write_addr = parport_ieee1284_epp_write_addr, .epp_read_addr = parport_ieee1284_epp_read_addr, .ecp_write_data = parport_ieee1284_ecp_write_data, .ecp_read_data = parport_ieee1284_ecp_read_data, .ecp_write_addr = parport_ieee1284_ecp_write_addr, .compat_write_data = parport_ieee1284_write_compat, .nibble_read_data = parport_ieee1284_read_nibble, .byte_read_data = parport_ieee1284_read_byte, .owner = THIS_MODULE, }; static int __devinit init_one_port(struct sbus_dev *sdev) { struct parport *p; /* at least in theory there may be a "we don't dma" case */ struct parport_operations *ops; void __iomem *base; int irq, dma, err = 0, size; struct bpp_regs __iomem *regs; unsigned char value_tcr; irq = sdev->irqs[0]; base = sbus_ioremap(&sdev->resource[0], 0, sdev->reg_addrs[0].reg_size, "sunbpp"); if (!base) return -ENODEV; size = sdev->reg_addrs[0].reg_size; dma = PARPORT_DMA_NONE; ops = kmalloc(sizeof(struct parport_operations), GFP_KERNEL); if (!ops) goto out_unmap; memcpy (ops, &parport_sunbpp_ops, sizeof (struct parport_operations)); dprintk(("register_port\n")); if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) goto out_free_ops; p->size = size; if ((err = request_irq(p->irq, parport_sunbpp_interrupt, IRQF_SHARED, p->name, p)) != 0) { goto out_put_port; } parport_sunbpp_enable_irq(p); regs = (struct bpp_regs __iomem *)p->base; value_tcr = sbus_readb(®s->p_tcr); value_tcr &= ~P_TCR_DIR; sbus_writeb(value_tcr, ®s->p_tcr); printk(KERN_INFO "%s: sunbpp at 0x%lx\n", p->name, p->base); dev_set_drvdata(&sdev->ofdev.dev, p); parport_announce_port(p); return 0; out_put_port: parport_put_port(p); out_free_ops: kfree(ops); out_unmap: sbus_iounmap(base, size); return err; } static int __devinit bpp_probe(struct of_device *dev, const struct of_device_id *match) { struct sbus_dev *sdev = to_sbus_device(&dev->dev); return init_one_port(sdev); } static int __devexit bpp_remove(struct of_device *dev) { struct parport *p = dev_get_drvdata(&dev->dev); struct parport_operations *ops = p->ops; parport_remove_port(p); if (p->irq != PARPORT_IRQ_NONE) { parport_sunbpp_disable_irq(p); free_irq(p->irq, p); } sbus_iounmap((void __iomem *) p->base, p->size); parport_put_port(p); kfree(ops); dev_set_drvdata(&dev->dev, NULL); return 0; } static struct of_device_id bpp_match[] = { { .name = "SUNW,bpp", }, {}, }; MODULE_DEVICE_TABLE(of, bpp_match); static struct of_platform_driver bpp_sbus_driver = { .name = "bpp", .match_table = bpp_match, .probe = bpp_probe, .remove = __devexit_p(bpp_remove), }; static int __init parport_sunbpp_init(void) { return of_register_driver(&bpp_sbus_driver, &sbus_bus_type); } static void __exit parport_sunbpp_exit(void) { of_unregister_driver(&bpp_sbus_driver); } MODULE_AUTHOR("Derrick J Brashear"); MODULE_DESCRIPTION("Parport Driver for Sparc bidirectional Port"); MODULE_SUPPORTED_DEVICE("Sparc Bidirectional Parallel Port"); MODULE_VERSION("2.0"); MODULE_LICENSE("GPL"); module_init(parport_sunbpp_init) module_exit(parport_sunbpp_exit)