ata: add Buddha PATA controller driver
Add Buddha PATA controller driver. It enables libata support for the Buddha, Catweasel and X-Surf expansion boards on the Zorro expansion bus. Module removal is currently unsupported (the old IDE's buddha driver also doesn't support it). Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Michael Schmitz <schmitzmic@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bartlomiej Zolnierkiewicz
Jens Axboe
parent
8834f5600c
commit
740c68a0cd
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@ -963,6 +963,18 @@ config PATA_GAYLE
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If unsure, say N.
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config PATA_BUDDHA
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tristate "Buddha/Catweasel/X-Surf PATA support"
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depends on ZORRO
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help
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This option enables support for the IDE interfaces
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on the Buddha, Catweasel and X-Surf expansion boards
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on the Zorro expansion bus. It supports up to two
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interfaces on the Buddha, three on the Catweasel and
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two on the X-Surf.
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If unsure, say N.
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config PATA_ISAPNP
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tristate "ISA Plug and Play PATA support"
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depends on ISAPNP
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@ -98,6 +98,7 @@ obj-$(CONFIG_PATA_WINBOND) += pata_sl82c105.o
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obj-$(CONFIG_PATA_CMD640_PCI) += pata_cmd640.o
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obj-$(CONFIG_PATA_FALCON) += pata_falcon.o
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obj-$(CONFIG_PATA_GAYLE) += pata_gayle.o
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obj-$(CONFIG_PATA_BUDDHA) += pata_buddha.o
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obj-$(CONFIG_PATA_ISAPNP) += pata_isapnp.o
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obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
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obj-$(CONFIG_PATA_MPIIX) += pata_mpiix.o
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257
drivers/ata/pata_buddha.c
Normal file
257
drivers/ata/pata_buddha.c
Normal file
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@ -0,0 +1,257 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Buddha, Catweasel and X-Surf PATA controller driver
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*
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* Copyright (c) 2018 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Based on buddha.c:
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*
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* Copyright (C) 1997, 2001 by Geert Uytterhoeven and others
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*/
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#include <linux/ata.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/libata.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/zorro.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_host.h>
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#include <asm/amigahw.h>
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#include <asm/amigaints.h>
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#include <asm/ide.h>
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#include <asm/setup.h>
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#define DRV_NAME "pata_buddha"
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#define DRV_VERSION "0.1.0"
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#define BUDDHA_BASE1 0x800
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#define BUDDHA_BASE2 0xa00
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#define BUDDHA_BASE3 0xc00
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#define XSURF_BASE1 0xb000 /* 2.5" interface */
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#define XSURF_BASE2 0xd000 /* 3.5" interface */
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#define BUDDHA_CONTROL 0x11a
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#define BUDDHA_IRQ 0xf00
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#define XSURF_IRQ 0x7e
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#define BUDDHA_IRQ_MR 0xfc0 /* master interrupt enable */
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enum {
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BOARD_BUDDHA = 0,
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BOARD_CATWEASEL,
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BOARD_XSURF
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};
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static unsigned int buddha_bases[3] __initdata = {
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BUDDHA_BASE1, BUDDHA_BASE2, BUDDHA_BASE3
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};
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static unsigned int xsurf_bases[2] __initdata = {
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XSURF_BASE1, XSURF_BASE2
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};
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static struct scsi_host_template pata_buddha_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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/* FIXME: is this needed? */
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static unsigned int pata_buddha_data_xfer(struct ata_queued_cmd *qc,
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unsigned char *buf,
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unsigned int buflen, int rw)
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{
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struct ata_device *dev = qc->dev;
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struct ata_port *ap = dev->link->ap;
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void __iomem *data_addr = ap->ioaddr.data_addr;
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unsigned int words = buflen >> 1;
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/* Transfer multiple of 2 bytes */
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if (rw == READ)
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raw_insw((u16 *)data_addr, (u16 *)buf, words);
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else
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raw_outsw((u16 *)data_addr, (u16 *)buf, words);
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/* Transfer trailing byte, if any. */
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if (unlikely(buflen & 0x01)) {
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unsigned char pad[2] = { };
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/* Point buf to the tail of buffer */
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buf += buflen - 1;
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if (rw == READ) {
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raw_insw((u16 *)data_addr, (u16 *)pad, 1);
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*buf = pad[0];
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} else {
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pad[0] = *buf;
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raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
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}
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words++;
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}
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return words << 1;
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}
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/*
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* Provide our own set_mode() as we don't want to change anything that has
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* already been configured..
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*/
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static int pata_buddha_set_mode(struct ata_link *link,
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struct ata_device **unused)
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{
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struct ata_device *dev;
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ata_for_each_dev(dev, link, ENABLED) {
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/* We don't really care */
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dev->pio_mode = dev->xfer_mode = XFER_PIO_0;
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dev->xfer_shift = ATA_SHIFT_PIO;
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dev->flags |= ATA_DFLAG_PIO;
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ata_dev_info(dev, "configured for PIO\n");
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}
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return 0;
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}
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static bool pata_buddha_irq_check(struct ata_port *ap)
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{
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u8 ch;
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ch = z_readb((unsigned long)ap->private_data);
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return !!(ch & 0x80);
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}
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static void pata_xsurf_irq_clear(struct ata_port *ap)
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{
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z_writeb(0, (unsigned long)ap->private_data);
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}
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static struct ata_port_operations pata_buddha_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = pata_buddha_data_xfer,
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.sff_irq_check = pata_buddha_irq_check,
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_buddha_set_mode,
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};
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static struct ata_port_operations pata_xsurf_ops = {
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.inherits = &ata_sff_port_ops,
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.sff_data_xfer = pata_buddha_data_xfer,
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.sff_irq_check = pata_buddha_irq_check,
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.sff_irq_clear = pata_xsurf_irq_clear,
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.cable_detect = ata_cable_unknown,
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.set_mode = pata_buddha_set_mode,
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};
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static int __init pata_buddha_init_one(void)
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{
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struct zorro_dev *z = NULL;
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while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
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static const char *board_name[]
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= { "Buddha", "Catweasel", "X-Surf" };
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struct ata_host *host;
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void __iomem *buddha_board;
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unsigned long board;
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unsigned int type, nr_ports = 2;
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int i;
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if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
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type = BOARD_BUDDHA;
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL) {
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type = BOARD_CATWEASEL;
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nr_ports++;
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} else if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF) {
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type = BOARD_XSURF;
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} else
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continue;
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dev_info(&z->dev, "%s IDE controller\n", board_name[type]);
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board = z->resource.start;
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if (type != BOARD_XSURF) {
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if (!devm_request_mem_region(&z->dev,
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board + BUDDHA_BASE1,
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0x800, DRV_NAME))
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continue;
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} else {
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if (!devm_request_mem_region(&z->dev,
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board + XSURF_BASE1,
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0x1000, DRV_NAME))
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continue;
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if (!devm_request_mem_region(&z->dev,
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board + XSURF_BASE2,
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0x1000, DRV_NAME))
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continue;
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}
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/* allocate host */
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host = ata_host_alloc(&z->dev, nr_ports);
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if (!host)
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continue;
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buddha_board = ZTWO_VADDR(board);
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/* enable the board IRQ on Buddha/Catweasel */
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if (type != BOARD_XSURF)
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z_writeb(0, buddha_board + BUDDHA_IRQ_MR);
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for (i = 0; i < nr_ports; i++) {
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struct ata_port *ap = host->ports[i];
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void __iomem *base, *irqport;
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unsigned long ctl = 0;
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if (type != BOARD_XSURF) {
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ap->ops = &pata_buddha_ops;
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base = buddha_board + buddha_bases[i];
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ctl = BUDDHA_CONTROL;
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irqport = buddha_board + BUDDHA_IRQ + i * 0x40;
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} else {
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ap->ops = &pata_xsurf_ops;
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base = buddha_board + xsurf_bases[i];
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/* X-Surf has no CS1* (Control/AltStat) */
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irqport = buddha_board + XSURF_IRQ;
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}
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ap->pio_mask = ATA_PIO4;
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ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
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ap->ioaddr.data_addr = base;
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ap->ioaddr.error_addr = base + 2 + 1 * 4;
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ap->ioaddr.feature_addr = base + 2 + 1 * 4;
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ap->ioaddr.nsect_addr = base + 2 + 2 * 4;
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ap->ioaddr.lbal_addr = base + 2 + 3 * 4;
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ap->ioaddr.lbam_addr = base + 2 + 4 * 4;
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ap->ioaddr.lbah_addr = base + 2 + 5 * 4;
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ap->ioaddr.device_addr = base + 2 + 6 * 4;
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ap->ioaddr.status_addr = base + 2 + 7 * 4;
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ap->ioaddr.command_addr = base + 2 + 7 * 4;
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if (ctl) {
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ap->ioaddr.altstatus_addr = base + ctl;
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ap->ioaddr.ctl_addr = base + ctl;
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}
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ap->private_data = (void *)irqport;
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ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", board,
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ctl ? board + buddha_bases[i] + ctl : 0);
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}
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ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
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IRQF_SHARED, &pata_buddha_sht);
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}
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return 0;
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}
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module_init(pata_buddha_init_one);
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MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
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MODULE_DESCRIPTION("low-level driver for Buddha/Catweasel/X-Surf PATA");
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MODULE_LICENSE("GPL v2");
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MODULE_VERSION(DRV_VERSION);
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