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path: root/drivers/ata/pata_falcon.c
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Diffstat (limited to 'drivers/ata/pata_falcon.c')
-rw-r--r--drivers/ata/pata_falcon.c142
1 files changed, 93 insertions, 49 deletions
diff --git a/drivers/ata/pata_falcon.c b/drivers/ata/pata_falcon.c
index 27b0952fde6b..334c4eea41ec 100644
--- a/drivers/ata/pata_falcon.c
+++ b/drivers/ata/pata_falcon.c
@@ -28,14 +28,16 @@
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stdma.h>
-#include <asm/ide.h>
#define DRV_NAME "pata_falcon"
#define DRV_VERSION "0.1.0"
-#define ATA_HD_CONTROL 0x39
+static int pata_falcon_swap_mask;
-static struct scsi_host_template pata_falcon_sht = {
+module_param_named(data_swab, pata_falcon_swap_mask, int, 0444);
+MODULE_PARM_DESC(data_swab, "Data byte swap enable/disable bitmap (0x1==drive1, 0x2==drive2, 0x4==drive3, 0x8==drive4, default==0)");
+
+static const struct scsi_host_template pata_falcon_sht = {
ATA_PIO_SHT(DRV_NAME),
};
@@ -50,21 +52,21 @@ static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
struct scsi_cmnd *cmd = qc->scsicmd;
bool swap = 1;
- if (dev->class == ATA_DEV_ATA && cmd && cmd->request &&
- !blk_rq_is_passthrough(cmd->request))
- swap = 0;
+ if (dev->class == ATA_DEV_ATA && cmd &&
+ !blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)))
+ swap = (uintptr_t)ap->private_data & BIT(dev->devno);
/* Transfer multiple of 2 bytes */
if (rw == READ) {
if (swap)
- raw_insw_swapw((u16 *)data_addr, (u16 *)buf, words);
+ raw_insw_swapw(data_addr, (u16 *)buf, words);
else
- raw_insw((u16 *)data_addr, (u16 *)buf, words);
+ raw_insw(data_addr, (u16 *)buf, words);
} else {
if (swap)
- raw_outsw_swapw((u16 *)data_addr, (u16 *)buf, words);
+ raw_outsw_swapw(data_addr, (u16 *)buf, words);
else
- raw_outsw((u16 *)data_addr, (u16 *)buf, words);
+ raw_outsw(data_addr, (u16 *)buf, words);
}
/* Transfer trailing byte, if any. */
@@ -76,16 +78,16 @@ static unsigned int pata_falcon_data_xfer(struct ata_queued_cmd *qc,
if (rw == READ) {
if (swap)
- raw_insw_swapw((u16 *)data_addr, (u16 *)pad, 1);
+ raw_insw_swapw(data_addr, (u16 *)pad, 1);
else
- raw_insw((u16 *)data_addr, (u16 *)pad, 1);
+ raw_insw(data_addr, (u16 *)pad, 1);
*buf = pad[0];
} else {
pad[0] = *buf;
if (swap)
- raw_outsw_swapw((u16 *)data_addr, (u16 *)pad, 1);
+ raw_outsw_swapw(data_addr, (u16 *)pad, 1);
else
- raw_outsw((u16 *)data_addr, (u16 *)pad, 1);
+ raw_outsw(data_addr, (u16 *)pad, 1);
}
words++;
}
@@ -119,25 +121,45 @@ static struct ata_port_operations pata_falcon_ops = {
.set_mode = pata_falcon_set_mode,
};
-static int __init pata_falcon_init_one(struct platform_device *pdev)
+static int pata_falcon_init_one(struct platform_device *pdev)
{
- struct resource *res;
+ struct resource *base_mem_res, *ctl_mem_res;
+ struct resource *base_res, *ctl_res, *irq_res;
struct ata_host *host;
struct ata_port *ap;
- void __iomem *base;
+ void __iomem *base, *ctl_base;
+ int mask_shift = 0; /* Q40 & Falcon default */
+ int irq = 0, io_offset = 1, reg_shift = 2; /* Falcon defaults */
- dev_info(&pdev->dev, "Atari Falcon PATA controller\n");
+ dev_info(&pdev->dev, "Atari Falcon and Q40/Q60 PATA controller\n");
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
+ base_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+ if (base_res && !devm_request_region(&pdev->dev, base_res->start,
+ resource_size(base_res), DRV_NAME)) {
+ dev_err(&pdev->dev, "resources busy\n");
+ return -EBUSY;
+ }
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), DRV_NAME)) {
+ ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
+ if (ctl_res && !devm_request_region(&pdev->dev, ctl_res->start,
+ resource_size(ctl_res), DRV_NAME)) {
dev_err(&pdev->dev, "resources busy\n");
return -EBUSY;
}
+ base_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!base_mem_res)
+ return -ENODEV;
+ if (!devm_request_mem_region(&pdev->dev, base_mem_res->start,
+ resource_size(base_mem_res), DRV_NAME)) {
+ dev_err(&pdev->dev, "resources busy\n");
+ return -EBUSY;
+ }
+
+ ctl_mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!ctl_mem_res)
+ return -ENODEV;
+
/* allocate host */
host = ata_host_alloc(&pdev->dev, 1);
if (!host)
@@ -147,47 +169,69 @@ static int __init pata_falcon_init_one(struct platform_device *pdev)
ap->ops = &pata_falcon_ops;
ap->pio_mask = ATA_PIO4;
ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
- ap->flags |= ATA_FLAG_PIO_POLLING;
-
- base = (void __iomem *)res->start;
- ap->ioaddr.data_addr = base;
- ap->ioaddr.error_addr = base + 1 + 1 * 4;
- ap->ioaddr.feature_addr = base + 1 + 1 * 4;
- ap->ioaddr.nsect_addr = base + 1 + 2 * 4;
- ap->ioaddr.lbal_addr = base + 1 + 3 * 4;
- ap->ioaddr.lbam_addr = base + 1 + 4 * 4;
- ap->ioaddr.lbah_addr = base + 1 + 5 * 4;
- ap->ioaddr.device_addr = base + 1 + 6 * 4;
- ap->ioaddr.status_addr = base + 1 + 7 * 4;
- ap->ioaddr.command_addr = base + 1 + 7 * 4;
-
- ap->ioaddr.altstatus_addr = base + ATA_HD_CONTROL;
- ap->ioaddr.ctl_addr = base + ATA_HD_CONTROL;
-
- ata_port_desc(ap, "cmd 0x%lx ctl 0x%lx", (unsigned long)base,
- (unsigned long)base + ATA_HD_CONTROL);
+
+ /* N.B. this assumes data_addr will be used for word-sized I/O only */
+ ap->ioaddr.data_addr = (void __iomem *)base_mem_res->start;
+
+ if (base_res) { /* only Q40 has IO resources */
+ io_offset = 0x10000;
+ reg_shift = 0;
+ base = (void __iomem *)base_res->start;
+ ctl_base = (void __iomem *)ctl_res->start;
+ } else {
+ base = (void __iomem *)base_mem_res->start;
+ ctl_base = (void __iomem *)ctl_mem_res->start;
+ }
+
+ ap->ioaddr.error_addr = base + io_offset + (1 << reg_shift);
+ ap->ioaddr.feature_addr = base + io_offset + (1 << reg_shift);
+ ap->ioaddr.nsect_addr = base + io_offset + (2 << reg_shift);
+ ap->ioaddr.lbal_addr = base + io_offset + (3 << reg_shift);
+ ap->ioaddr.lbam_addr = base + io_offset + (4 << reg_shift);
+ ap->ioaddr.lbah_addr = base + io_offset + (5 << reg_shift);
+ ap->ioaddr.device_addr = base + io_offset + (6 << reg_shift);
+ ap->ioaddr.status_addr = base + io_offset + (7 << reg_shift);
+ ap->ioaddr.command_addr = base + io_offset + (7 << reg_shift);
+
+ ap->ioaddr.altstatus_addr = ctl_base + io_offset;
+ ap->ioaddr.ctl_addr = ctl_base + io_offset;
+
+ ata_port_desc(ap, "cmd %px ctl %px data %px",
+ base, ctl_base, ap->ioaddr.data_addr);
+
+ if (pdev->id > 0)
+ mask_shift = 2;
+ ap->private_data = (void *)(uintptr_t)(pata_falcon_swap_mask >> mask_shift);
+
+ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (irq_res && irq_res->start > 0) {
+ irq = irq_res->start;
+ } else {
+ ap->flags |= ATA_FLAG_PIO_POLLING;
+ ata_port_desc(ap, "no IRQ, using PIO polling");
+ }
/* activate */
- return ata_host_activate(host, 0, NULL, 0, &pata_falcon_sht);
+ return ata_host_activate(host, irq, irq ? ata_sff_interrupt : NULL,
+ IRQF_SHARED, &pata_falcon_sht);
}
-static int __exit pata_falcon_remove_one(struct platform_device *pdev)
+static void pata_falcon_remove_one(struct platform_device *pdev)
{
struct ata_host *host = platform_get_drvdata(pdev);
ata_host_detach(host);
-
- return 0;
}
static struct platform_driver pata_falcon_driver = {
- .remove = __exit_p(pata_falcon_remove_one),
- .driver = {
+ .probe = pata_falcon_init_one,
+ .remove = pata_falcon_remove_one,
+ .driver = {
.name = "atari-falcon-ide",
},
};
-module_platform_driver_probe(pata_falcon_driver, pata_falcon_init_one);
+module_platform_driver(pata_falcon_driver);
MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
MODULE_DESCRIPTION("low-level driver for Atari Falcon PATA");
generated by cgit (git 2.34.1) at 2025-12-26 07:51:50 +0000