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- // 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/mod_devicetable.h>
- #include <linux/module.h>
- #include <linux/types.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 "0.1.1"
- #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] = {
- BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
- };
- static unsigned int xsurf_bases[2] = {
- 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 pata_buddha_probe(struct zorro_dev *z,
- const struct zorro_device_id *ent)
- {
- static const char * const board_name[] = {
- "Buddha", "Catweasel", "X-Surf"
- };
- struct ata_host *host;
- void __iomem *buddha_board;
- unsigned long board;
- unsigned int type = ent->driver_data;
- unsigned int nr_ports = (type == BOARD_CATWEASEL) ? 3 : 2;
- void *old_drvdata;
- int i;
- 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))
- return -ENXIO;
- } else {
- if (!devm_request_mem_region(&z->dev,
- board + XSURF_BASE1,
- 0x1000, DRV_NAME))
- return -ENXIO;
- if (!devm_request_mem_region(&z->dev,
- board + XSURF_BASE2,
- 0x1000, DRV_NAME)) {
- }
- }
- /* Workaround for X-Surf: Save drvdata in case zorro8390 has set it */
- if (type == BOARD_XSURF)
- old_drvdata = dev_get_drvdata(&z->dev);
- /* allocate host */
- host = ata_host_alloc(&z->dev, nr_ports);
- if (type == BOARD_XSURF)
- dev_set_drvdata(&z->dev, old_drvdata);
- if (!host)
- return -ENXIO;
- 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;
- }
- static void pata_buddha_remove(struct zorro_dev *z)
- {
- struct ata_host *host = dev_get_drvdata(&z->dev);
- ata_host_detach(host);
- }
- static const struct zorro_device_id pata_buddha_zorro_tbl[] = {
- { ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA, BOARD_BUDDHA},
- { ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL, BOARD_CATWEASEL},
- { 0 }
- };
- MODULE_DEVICE_TABLE(zorro, pata_buddha_zorro_tbl);
- static struct zorro_driver pata_buddha_driver = {
- .name = "pata_buddha",
- .id_table = pata_buddha_zorro_tbl,
- .probe = pata_buddha_probe,
- .remove = pata_buddha_remove,
- };
- /*
- * We cannot have a modalias for X-Surf boards, as it competes with the
- * zorro8390 network driver. As a stopgap measure until we have proper
- * MFD support for this board, we manually attach to it late after Zorro
- * has enumerated its boards.
- */
- static int __init pata_buddha_late_init(void)
- {
- struct zorro_dev *z = NULL;
- /* Auto-bind to regular boards */
- zorro_register_driver(&pata_buddha_driver);
- /* Manually bind to all X-Surf boards */
- while ((z = zorro_find_device(ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, z))) {
- static struct zorro_device_id xsurf_ent = {
- ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, BOARD_XSURF
- };
- pata_buddha_probe(z, &xsurf_ent);
- }
- return 0;
- }
- late_initcall(pata_buddha_late_init);
- MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
- MODULE_DESCRIPTION("low-level driver for Buddha/Catweasel/X-Surf PATA");
- MODULE_LICENSE("GPL v2");
- MODULE_VERSION(DRV_VERSION);
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