drivers/ata/pata_buddha.c - kernel/msm-5.4 - Gitiles

 // SPDX-License-Identifier: GPL-2.0

 /*
  * Buddha, Catweasel and X-Surf PATA controller driver
  *
  * Copyright (c) 2018 Samsung Electronics Co., Ltd.
  *		http://www.samsung.com
  *
  * Based on buddha.c:
  *
  *	Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
  */

 #include <linux/ata.h>
 #include <linux/blkdev.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/libata.h>
 #include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/zorro.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_host.h>

 #include <asm/amigahw.h>
 #include <asm/amigaints.h>
 #include <asm/ide.h>
 #include <asm/setup.h>

 #define DRV_NAME "pata_buddha"
 #define DRV_VERSION "0.1.0"

 #define BUDDHA_BASE1	0x800
 #define BUDDHA_BASE2	0xa00
 #define BUDDHA_BASE3	0xc00
 #define XSURF_BASE1	0xb000 /* 2.5" interface */
 #define XSURF_BASE2	0xd000 /* 3.5" interface */
 #define BUDDHA_CONTROL	0x11a
 #define BUDDHA_IRQ	0xf00
 #define XSURF_IRQ	0x7e
 #define BUDDHA_IRQ_MR	0xfc0	/* master interrupt enable */

 enum {
 	BOARD_BUDDHA = 0,
 	BOARD_CATWEASEL,
 	BOARD_XSURF
 };

 static unsigned int buddha_bases[3] __initdata = {
 	BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
 };

 static unsigned int xsurf_bases[2] __initdata = {
 	XSURF_BASE1, XSURF_BASE2
 };

 static struct scsi_host_template pata_buddha_sht = {
 	ATA_PIO_SHT(DRV_NAME),
 };

 /* FIXME: is this needed? */
 static unsigned int pata_buddha_data_xfer(struct ata_queued_cmd *qc,
 					 unsigned char *buf,
 					 unsigned int buflen, int rw)
 {
 	struct ata_device *dev = qc->dev;
 	struct ata_port *ap = dev->link->ap;
 	void __iomem *data_addr = ap->ioaddr.data_addr;
 	unsigned int words = buflen >> 1;

 	/* Transfer multiple of 2 bytes */
 	if (rw == READ)
 		raw_insw((u16 *)data_addr, (u16 *)buf, words);
 	else
 		raw_outsw((u16 *)data_addr, (u16 *)buf, words);

 	/* Transfer trailing byte, if any. */
 	if (unlikely(buflen & 0x01)) {
 		unsigned char pad[2] = { };

 		/* Point buf to the tail of buffer */
 		buf += buflen - 1;

 		if (rw == READ) {
 			raw_insw((u16 *)data_addr, (u16 *)pad, 1);
 			*buf = pad[0];
 		} else {
 			pad[0] = *buf;
 			raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
 		}
 		words++;
 	}

 	return words << 1;
 }

 /*
  * Provide our own set_mode() as we don't want to change anything that has
  * already been configured..
  */
 static int pata_buddha_set_mode(struct ata_link *link,
 				struct ata_device **unused)
 {
 	struct ata_device *dev;

 	ata_for_each_dev(dev, link, ENABLED) {
 		/* We don't really care */
 		dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
 		dev->xfer_shift = ATA_SHIFT_PIO;
 		dev->flags |= ATA_DFLAG_PIO;
 		ata_dev_info(dev, "configured for PIO\n");
 	}
 	return 0;
 }

 static bool pata_buddha_irq_check(struct ata_port *ap)
 {
 	u8 ch;

 	ch = z_readb((unsigned long)ap->private_data);

 	return !!(ch & 0x80);
 }

 static void pata_xsurf_irq_clear(struct ata_port *ap)
 {
 	z_writeb(0, (unsigned long)ap->private_data);
 }

 static struct ata_port_operations pata_buddha_ops = {
 	.inherits	= &ata_sff_port_ops,
 	.sff_data_xfer	= pata_buddha_data_xfer,
 	.sff_irq_check	= pata_buddha_irq_check,
 	.cable_detect	= ata_cable_unknown,
 	.set_mode	= pata_buddha_set_mode,
 };

 static struct ata_port_operations pata_xsurf_ops = {
 	.inherits	= &ata_sff_port_ops,
 	.sff_data_xfer	= pata_buddha_data_xfer,
 	.sff_irq_check	= pata_buddha_irq_check,
 	.sff_irq_clear	= pata_xsurf_irq_clear,
 	.cable_detect	= ata_cable_unknown,
 	.set_mode	= pata_buddha_set_mode,
 };

 static int __init pata_buddha_init_one(void)
 {
 	struct zorro_dev *z = NULL;

 	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
 		static const char *board_name[]
 			= { "Buddha", "Catweasel", "X-Surf" };
 		struct ata_host *host;
 		void __iomem *buddha_board;
 		unsigned long board;
 		unsigned int type, nr_ports = 2;
 		int i;

 		if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
 			type = BOARD_BUDDHA;
 		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
 			type = BOARD_CATWEASEL;
 			nr_ports++;
 		} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
 			type = BOARD_XSURF;
 		} else
 			continue;

 		dev_info(&z->dev, "%s IDE controller\n", board_name[type]);

 		board = z->resource.start;

 		if (type != BOARD_XSURF) {
 			if (!devm_request_mem_region(&z->dev,
 						     board + BUDDHA_BASE1,
 						     0x800, DRV_NAME))
 				continue;
 		} else {
 			if (!devm_request_mem_region(&z->dev,
 						     board + XSURF_BASE1,
 						     0x1000, DRV_NAME))
 				continue;
 			if (!devm_request_mem_region(&z->dev,
 						     board + XSURF_BASE2,
 						     0x1000, DRV_NAME))
 				continue;
 		}

 		/* allocate host */
 		host = ata_host_alloc(&z->dev, nr_ports);
 		if (!host)
 			continue;

 		buddha_board = ZTWO_VADDR(board);

 		/* enable the board IRQ on Buddha/Catweasel */
 		if (type != BOARD_XSURF)
 			z_writeb(0, buddha_board + BUDDHA_IRQ_MR);

 		for (i = 0; i < nr_ports; i++) {
 			struct ata_port *ap = host->ports[i];
 			void __iomem *base, *irqport;
 			unsigned long ctl = 0;

 			if (type != BOARD_XSURF) {
 				ap->ops = &pata_buddha_ops;
 				base = buddha_board + buddha_bases[i];
 				ctl = BUDDHA_CONTROL;
 				irqport = buddha_board + BUDDHA_IRQ + i * 0x40;
 			} else {
 				ap->ops = &pata_xsurf_ops;
 				base = buddha_board + xsurf_bases[i];
 				/* X-Surf has no CS1* (Control/AltStat) */
 				irqport = buddha_board + XSURF_IRQ;
 			}

 			ap->pio_mask = ATA_PIO4;
 			ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;

 			ap->ioaddr.data_addr		= base;
 			ap->ioaddr.error_addr		= base + 2 + 1 * 4;
 			ap->ioaddr.feature_addr		= base + 2 + 1 * 4;
 			ap->ioaddr.nsect_addr		= base + 2 + 2 * 4;
 			ap->ioaddr.lbal_addr		= base + 2 + 3 * 4;
 			ap->ioaddr.lbam_addr		= base + 2 + 4 * 4;
 			ap->ioaddr.lbah_addr		= base + 2 + 5 * 4;
 			ap->ioaddr.device_addr		= base + 2 + 6 * 4;
 			ap->ioaddr.status_addr		= base + 2 + 7 * 4;
 			ap->ioaddr.command_addr		= base + 2 + 7 * 4;

 			if (ctl) {
 				ap->ioaddr.altstatus_addr = base + ctl;
 				ap->ioaddr.ctl_addr	  = base + ctl;
 			}

 			ap->private_data = (void *)irqport;

 			ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", board,
 				      ctl ? board + buddha_bases[i] + ctl : 0);
 		}

 		ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
 				  IRQF_SHARED, &pata_buddha_sht);

 	}

 	return 0;
 }

 module_init(pata_buddha_init_one);

 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
 MODULE_DESCRIPTION("low-level driver for Buddha/Catweasel/X-Surf PATA");
 MODULE_LICENSE("GPL v2");
 MODULE_VERSION(DRV_VERSION);
	// SPDX-License-Identifier: GPL-2.0

	/*
	* Buddha, Catweasel and X-Surf PATA controller driver
	*
	* Copyright (c) 2018 Samsung Electronics Co., Ltd.
	* http://www.samsung.com
	*
	* Based on buddha.c:
	*
	* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
	*/

	#include <linux/ata.h>
	#include <linux/blkdev.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/kernel.h>
	#include <linux/libata.h>
	#include <linux/mm.h>
	#include <linux/module.h>
	#include <linux/zorro.h>
	#include <scsi/scsi_cmnd.h>
	#include <scsi/scsi_host.h>

	#include <asm/amigahw.h>
	#include <asm/amigaints.h>
	#include <asm/ide.h>
	#include <asm/setup.h>

	#define DRV_NAME "pata_buddha"
	#define DRV_VERSION "0.1.0"

	#define BUDDHA_BASE1 0x800
	#define BUDDHA_BASE2 0xa00
	#define BUDDHA_BASE3 0xc00
	#define XSURF_BASE1 0xb000 /* 2.5" interface */
	#define XSURF_BASE2 0xd000 /* 3.5" interface */
	#define BUDDHA_CONTROL 0x11a
	#define BUDDHA_IRQ 0xf00
	#define XSURF_IRQ 0x7e
	#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */

	enum {
	BOARD_BUDDHA = 0,
	BOARD_CATWEASEL,
	BOARD_XSURF
	};

	static unsigned int buddha_bases[3] __initdata = {
	BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
	};

	static unsigned int xsurf_bases[2] __initdata = {
	XSURF_BASE1, XSURF_BASE2
	};

	static struct scsi_host_template pata_buddha_sht = {
	ATA_PIO_SHT(DRV_NAME),
	};

	/* FIXME: is this needed? */
	static unsigned int pata_buddha_data_xfer(struct ata_queued_cmd *qc,
	unsigned char *buf,
	unsigned int buflen, int rw)
	{
	struct ata_device *dev = qc->dev;
	struct ata_port *ap = dev->link->ap;
	void __iomem *data_addr = ap->ioaddr.data_addr;
	unsigned int words = buflen >> 1;

	/* Transfer multiple of 2 bytes */
	if (rw == READ)
	raw_insw((u16 )data_addr, (u16 )buf, words);
	else
	raw_outsw((u16 )data_addr, (u16 )buf, words);

	/* Transfer trailing byte, if any. */
	if (unlikely(buflen & 0x01)) {
	unsigned char pad[2] = { };

	/* Point buf to the tail of buffer */
	buf += buflen - 1;

	if (rw == READ) {
	raw_insw((u16 )data_addr, (u16 )pad, 1);
	*buf = pad[0];
	} else {
	pad[0] = *buf;
	raw_outsw((u16 )data_addr, (u16 )pad, 1);
	}
	words++;
	}

	return words << 1;
	}

	/*
	* Provide our own set_mode() as we don't want to change anything that has
	* already been configured..
	*/
	static int pata_buddha_set_mode(struct ata_link *link,
	struct ata_device **unused)
	{
	struct ata_device *dev;

	ata_for_each_dev(dev, link, ENABLED) {
	/* We don't really care */
	dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
	dev->xfer_shift = ATA_SHIFT_PIO;
	dev->flags \|= ATA_DFLAG_PIO;
	ata_dev_info(dev, "configured for PIO\n");
	}
	return 0;
	}

	static bool pata_buddha_irq_check(struct ata_port *ap)
	{
	u8 ch;

	ch = z_readb((unsigned long)ap->private_data);

	return !!(ch & 0x80);
	}

	static void pata_xsurf_irq_clear(struct ata_port *ap)
	{
	z_writeb(0, (unsigned long)ap->private_data);
	}

	static struct ata_port_operations pata_buddha_ops = {
	.inherits = &ata_sff_port_ops,
	.sff_data_xfer = pata_buddha_data_xfer,
	.sff_irq_check = pata_buddha_irq_check,
	.cable_detect = ata_cable_unknown,
	.set_mode = pata_buddha_set_mode,
	};

	static struct ata_port_operations pata_xsurf_ops = {
	.inherits = &ata_sff_port_ops,
	.sff_data_xfer = pata_buddha_data_xfer,
	.sff_irq_check = pata_buddha_irq_check,
	.sff_irq_clear = pata_xsurf_irq_clear,
	.cable_detect = ata_cable_unknown,
	.set_mode = pata_buddha_set_mode,
	};

	static int __init pata_buddha_init_one(void)
	{
	struct zorro_dev *z = NULL;

	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
	static const char *board_name[]
	= { "Buddha", "Catweasel", "X-Surf" };
	struct ata_host *host;
	void __iomem *buddha_board;
	unsigned long board;
	unsigned int type, nr_ports = 2;
	int i;

	if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
	type = BOARD_BUDDHA;
	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
	type = BOARD_CATWEASEL;
	nr_ports++;
	} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
	type = BOARD_XSURF;
	} else
	continue;

	dev_info(&z->dev, "%s IDE controller\n", board_name[type]);

	board = z->resource.start;

	if (type != BOARD_XSURF) {
	if (!devm_request_mem_region(&z->dev,
	board + BUDDHA_BASE1,
	0x800, DRV_NAME))
	continue;
	} else {
	if (!devm_request_mem_region(&z->dev,
	board + XSURF_BASE1,
	0x1000, DRV_NAME))
	continue;
	if (!devm_request_mem_region(&z->dev,
	board + XSURF_BASE2,
	0x1000, DRV_NAME))
	continue;
	}

	/* allocate host */
	host = ata_host_alloc(&z->dev, nr_ports);
	if (!host)
	continue;

	buddha_board = ZTWO_VADDR(board);

	/* enable the board IRQ on Buddha/Catweasel */
	if (type != BOARD_XSURF)
	z_writeb(0, buddha_board + BUDDHA_IRQ_MR);

	for (i = 0; i < nr_ports; i++) {
	struct ata_port *ap = host->ports[i];
	void __iomem base, irqport;
	unsigned long ctl = 0;

	if (type != BOARD_XSURF) {
	ap->ops = &pata_buddha_ops;
	base = buddha_board + buddha_bases[i];
	ctl = BUDDHA_CONTROL;
	irqport = buddha_board + BUDDHA_IRQ + i * 0x40;
	} else {
	ap->ops = &pata_xsurf_ops;
	base = buddha_board + xsurf_bases[i];
	/* X-Surf has no CS1* (Control/AltStat) */
	irqport = buddha_board + XSURF_IRQ;
	}

	ap->pio_mask = ATA_PIO4;
	ap->flags \|= ATA_FLAG_SLAVE_POSS \| ATA_FLAG_NO_IORDY;

	ap->ioaddr.data_addr = base;
	ap->ioaddr.error_addr = base + 2 + 1 * 4;
	ap->ioaddr.feature_addr = base + 2 + 1 * 4;
	ap->ioaddr.nsect_addr = base + 2 + 2 * 4;
	ap->ioaddr.lbal_addr = base + 2 + 3 * 4;
	ap->ioaddr.lbam_addr = base + 2 + 4 * 4;
	ap->ioaddr.lbah_addr = base + 2 + 5 * 4;
	ap->ioaddr.device_addr = base + 2 + 6 * 4;
	ap->ioaddr.status_addr = base + 2 + 7 * 4;
	ap->ioaddr.command_addr = base + 2 + 7 * 4;

	if (ctl) {
	ap->ioaddr.altstatus_addr = base + ctl;
	ap->ioaddr.ctl_addr = base + ctl;
	}

	ap->private_data = (void *)irqport;

	ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", board,
	ctl ? board + buddha_bases[i] + ctl : 0);
	}

	ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
	IRQF_SHARED, &pata_buddha_sht);

	}

	return 0;
	}

	module_init(pata_buddha_init_one);

	MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
	MODULE_DESCRIPTION("low-level driver for Buddha/Catweasel/X-Surf PATA");
	MODULE_LICENSE("GPL v2");
	MODULE_VERSION(DRV_VERSION);