1 // SPDX-License-Identifier: GPL-2.0-only
2 /* parport_sunbpp.c: Parallel-port routines for SBUS
11  *          Grant Guenther <grant@torque.net>
40 #include <asm/dma.h>             /* BPP uses LSI 64854 for DMA */
53 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_disable_irq()
56 	tmp = sbus_readl(&regs->p_csr);  in parport_sunbpp_disable_irq()
58 	sbus_writel(tmp, &regs->p_csr);  in parport_sunbpp_disable_irq()
63 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_enable_irq()
66 	tmp = sbus_readl(&regs->p_csr);  in parport_sunbpp_enable_irq()
68 	sbus_writel(tmp, &regs->p_csr);  in parport_sunbpp_enable_irq()
73 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_write_data()
75 	sbus_writeb(d, &regs->p_dr);  in parport_sunbpp_write_data()
81 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_read_data()
83 	return sbus_readb(&regs->p_dr);  in parport_sunbpp_read_data()
88 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in status_sunbpp_to_pc()
90 	unsigned char value_tcr = sbus_readb(&regs->p_tcr);  in status_sunbpp_to_pc()
91 	unsigned char value_ir = sbus_readb(&regs->p_ir);  in status_sunbpp_to_pc()
111 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in control_sunbpp_to_pc()
113 	unsigned char value_tcr = sbus_readb(&regs->p_tcr);  in control_sunbpp_to_pc()
114 	unsigned char value_or = sbus_readb(&regs->p_or);  in control_sunbpp_to_pc()
139 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_frob_control()
140 	unsigned char value_tcr = sbus_readb(&regs->p_tcr);  in parport_sunbpp_frob_control()
141 	unsigned char value_or = sbus_readb(&regs->p_or);  in parport_sunbpp_frob_control()
174 	sbus_writeb(value_or, &regs->p_or);  in parport_sunbpp_frob_control()
175 	sbus_writeb(value_tcr, &regs->p_tcr);  in parport_sunbpp_frob_control()
198 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_data_forward()
199 	unsigned char value_tcr = sbus_readb(&regs->p_tcr);  in parport_sunbpp_data_forward()
203 	sbus_writeb(value_tcr, &regs->p_tcr);  in parport_sunbpp_data_forward()
208 	struct bpp_regs __iomem *regs = (struct bpp_regs __iomem *)p->base;  in parport_sunbpp_data_reverse()
209 	u8 val = sbus_readb(&regs->p_tcr);  in parport_sunbpp_data_reverse()
213 	sbus_writeb(val, &regs->p_tcr);  in parport_sunbpp_data_reverse()
218 	s->u.pc.ctr = 0xc;  in parport_sunbpp_init_state()
219 	s->u.pc.ecr = 0x0;  in parport_sunbpp_init_state()
224 	s->u.pc.ctr = parport_sunbpp_read_control(p);  in parport_sunbpp_save_state()
229 	parport_sunbpp_write_control(p, s->u.pc.ctr);  in parport_sunbpp_restore_state()
273 	int irq, dma, err = 0, size;  in bpp_probe()  local
278 	irq = op->archdata.irqs[0];  in bpp_probe()
279 	base = of_ioremap(&op->resource[0], 0,  in bpp_probe()
280 			  resource_size(&op->resource[0]),  in bpp_probe()
283 		return -ENODEV;  in bpp_probe()
285 	size = resource_size(&op->resource[0]);  in bpp_probe()
286 	dma = PARPORT_DMA_NONE;  in bpp_probe()
291 		err = -ENOMEM;  in bpp_probe()
296 	if (!(p = parport_register_port((unsigned long)base, irq, dma, ops))) {  in bpp_probe()
297 		err = -ENOMEM;  in bpp_probe()
301 	p->size = size;  in bpp_probe()
302 	p->dev = &op->dev;  in bpp_probe()
304 	if ((err = request_irq(p->irq, parport_irq_handler,  in bpp_probe()
305 			       IRQF_SHARED, p->name, p)) != 0) {  in bpp_probe()
311 	regs = (struct bpp_regs __iomem *)p->base;  in bpp_probe()
313 	value_tcr = sbus_readb(&regs->p_tcr);  in bpp_probe()
315 	sbus_writeb(value_tcr, &regs->p_tcr);  in bpp_probe()
317 	pr_info("%s: sunbpp at 0x%lx\n", p->name, p->base);  in bpp_probe()
319 	dev_set_drvdata(&op->dev, p);  in bpp_probe()
332 	of_iounmap(&op->resource[0], base, size);  in bpp_probe()
339 	struct parport *p = dev_get_drvdata(&op->dev);  in bpp_remove()
340 	struct parport_operations *ops = p->ops;  in bpp_remove()
344 	if (p->irq != PARPORT_IRQ_NONE) {  in bpp_remove()
346 		free_irq(p->irq, p);  in bpp_remove()
349 	of_iounmap(&op->resource[0], (void __iomem *) p->base, p->size);  in bpp_remove()
353 	dev_set_drvdata(&op->dev, NULL);  in bpp_remove()