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/* SPDX-License-Identifier: GPL-2.0 / / parport.h: sparc64 specific parport initialization and dma. * * Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be) / #ifndef _ASM_SPARC64_PARPORT_H #define _ASM_SPARC64_PARPORT_H 1 #include <linux/of_device.h> #include <asm/ebus_dma.h> #include <asm/ns87303.h> #include <asm/prom.h> #define PARPORT_PC_MAX_PORTS PARPORT_MAX / * While sparc64 doesn't have an ISA DMA API, we provide something that looks * close enough to make parport_pc happy / #define HAS_DMA #ifdef CONFIG_PARPORT_PC_FIFO static DEFINE_SPINLOCK(dma_spin_lock); #define claim_dma_lock() \ ({ unsigned long flags; \ spin_lock_irqsave(&dma_spin_lock, flags); \ flags; \ }) #define release_dma_lock(__flags) \ spin_unlock_irqrestore(&dma_spin_lock, __flags); #endif static struct sparc_ebus_info { struct ebus_dma_info info; unsigned int addr; unsigned int count; int lock; struct parport port; } sparc_ebus_dmas[PARPORT_PC_MAX_PORTS]; static DECLARE_BITMAP(dma_slot_map, PARPORT_PC_MAX_PORTS); static inline int request_dma(unsigned int dmanr, const char device_id) { if (dmanr >= PARPORT_PC_MAX_PORTS) return -EINVAL; if (xchg(&sparc_ebus_dmas[dmanr].lock, 1) != 0) return -EBUSY; return 0; } static inline void free_dma(unsigned int dmanr) { if (dmanr >= PARPORT_PC_MAX_PORTS) { printk(KERN_WARNING "Trying to free DMA%d\n", dmanr); return; } if (xchg(&sparc_ebus_dmas[dmanr].lock, 0) == 0) { printk(KERN_WARNING "Trying to free free DMA%d\n", dmanr); return; } } static inline void enable_dma(unsigned int dmanr) { ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1); if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info, sparc_ebus_dmas[dmanr].addr, sparc_ebus_dmas[dmanr].count)) BUG(); } static inline void disable_dma(unsigned int dmanr) { ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0); } static inline void clear_dma_ff(unsigned int dmanr) { / nothing / } static inline void set_dma_mode(unsigned int dmanr, char mode) { ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE)); } static inline void set_dma_addr(unsigned int dmanr, unsigned int addr) { sparc_ebus_dmas[dmanr].addr = addr; } static inline void set_dma_count(unsigned int dmanr, unsigned int count) { sparc_ebus_dmas[dmanr].count = count; } static inline unsigned int get_dma_residue(unsigned int dmanr) { return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info); } static int ecpp_probe(struct platform_device op) { unsigned long base = op->resource[0].start; unsigned long config = op->resource[1].start; unsigned long d_base = op->resource[2].start; unsigned long d_len; struct device_node parent; struct parport p; int slot, err; parent = op->dev.of_node->parent; if (of_node_name_eq(parent, "dma")) { p = parport_pc_probe_port(base, base + 0x400, op->archdata.irqs[0], PARPORT_DMA_NOFIFO, op->dev.parent->parent, 0); if (!p) return -ENOMEM; dev_set_drvdata(&op->dev, p); return 0; } for (slot = 0; slot < PARPORT_PC_MAX_PORTS; slot++) { if (!test_and_set_bit(slot, dma_slot_map)) break; } err = -ENODEV; if (slot >= PARPORT_PC_MAX_PORTS) goto out_err; spin_lock_init(&sparc_ebus_dmas[slot].info.lock); d_len = (op->resource[2].end - d_base) + 1UL; sparc_ebus_dmas[slot].info.regs = of_ioremap(&op->resource[2], 0, d_len, "ECPP DMA"); if (!sparc_ebus_dmas[slot].info.regs) goto out_clear_map; sparc_ebus_dmas[slot].info.flags = 0; sparc_ebus_dmas[slot].info.callback = NULL; sparc_ebus_dmas[slot].info.client_cookie = NULL; sparc_ebus_dmas[slot].info.irq = 0xdeadbeef; strcpy(sparc_ebus_dmas[slot].info.name, "parport"); if (ebus_dma_register(&sparc_ebus_dmas[slot].info)) goto out_unmap_regs; ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 1); /* Configure IRQ to Push Pull, Level Low / / Enable ECP, set bit 2 of the CTR first / outb(0x04, base + 0x02); ns87303_modify(config, PCR, PCR_EPP_ENABLE \| PCR_IRQ_ODRAIN, PCR_ECP_ENABLE \| PCR_ECP_CLK_ENA \| PCR_IRQ_POLAR); / CTR bit 5 controls direction of port / ns87303_modify(config, PTR, 0, PTR_LPT_REG_DIR); p = parport_pc_probe_port(base, base + 0x400, op->archdata.irqs[0], slot, op->dev.parent, 0); err = -ENOMEM; if (!p) goto out_disable_irq; dev_set_drvdata(&op->dev, p); return 0; out_disable_irq: ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0); ebus_dma_unregister(&sparc_ebus_dmas[slot].info); out_unmap_regs: of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len); out_clear_map: clear_bit(slot, dma_slot_map); out_err: return err; } static int ecpp_remove(struct platform_device op) { struct parport p = dev_get_drvdata(&op->dev); int slot = p->dma; parport_pc_unregister_port(p); if (slot != PARPORT_DMA_NOFIFO) { unsigned long d_base = op->resource[2].start; unsigned long d_len; d_len = (op->resource[2].end - d_base) + 1UL; ebus_dma_irq_enable(&sparc_ebus_dmas[slot].info, 0); ebus_dma_unregister(&sparc_ebus_dmas[slot].info); of_iounmap(&op->resource[2], sparc_ebus_dmas[slot].info.regs, d_len); clear_bit(slot, dma_slot_map); } return 0; } static const struct of_device_id ecpp_match[] = { { .name = "ecpp", }, { .name = "parallel", .compatible = "ecpp", }, { .name = "parallel", .compatible = "ns87317-ecpp", }, { .name = "parallel", .compatible = "pnpALI,1533,3", }, {}, }; static struct platform_driver ecpp_driver = { .driver = { .name = "ecpp", .of_match_table = ecpp_match, }, .probe = ecpp_probe, .remove = ecpp_remove, }; static int parport_pc_find_nonpci_ports(int autoirq, int autodma) { return platform_driver_register(&ecpp_driver); } #endif / !(_ASM_SPARC64_PARPORT_H */

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