forked from Minki/linux
ata/pata_buddha: Probe via modalias instead of initcall
Up until now, the pata_buddha driver would only check for cards on
initcall time. Now, the kernel will call its probe function as soon
as a compatible card is detected.
v7: Removed suppress_bind_attrs that slipped in
v6: Only do the drvdata workaround for X-Surf (remove breaks otherwise)
Style
v5: Remove module_exit(): There's no good way to handle the X-Surf hack.
Also include a workaround to save X-Surf's drvdata in case zorro8390
is active.
v4: Clean up pata_buddha_probe() by using ent->driver_data.
Support X-Surf via late_initcall()
v3: Clean up devm_*, implement device removal.
v2: Rename 'zdev' to 'z' to make the patch easy to analyse with
git diff --ignore-space-change
Signed-off-by: Max Staudt <max@enpas.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Max Staudt
Jens Axboe
parent
e21a712a96
commit
12ce6b0d21
@ -18,7 +18,9 @@
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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/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/types.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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@ -29,7 +31,7 @@
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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 DRV_VERSION "0.1.1"
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#define BUDDHA_BASE1 0x800
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#define BUDDHA_BASE2 0xa00
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@ -47,11 +49,11 @@ enum {
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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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static unsigned int buddha_bases[3] = {
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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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static unsigned int xsurf_bases[2] = {
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XSURF_BASE1, XSURF_BASE2
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};
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@ -145,111 +147,151 @@ static struct ata_port_operations pata_xsurf_ops = {
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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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static int pata_buddha_probe(struct zorro_dev *z,
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const struct zorro_device_id *ent)
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{
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struct zorro_dev *z = NULL;
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static const char * const board_name[] = {
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"Buddha", "Catweasel", "X-Surf"
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};
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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 = ent->driver_data;
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unsigned int nr_ports = (type == BOARD_CATWEASEL) ? 3 : 2;
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void *old_drvdata;
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int i;
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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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dev_info(&z->dev, "%s IDE controller\n", board_name[type]);
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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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board = z->resource.start;
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dev_info(&z->dev, "%s IDE controller\n", board_name[type]);
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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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return -ENXIO;
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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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return -ENXIO;
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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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}
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}
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board = z->resource.start;
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/* Workaround for X-Surf: Save drvdata in case zorro8390 has set it */
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if (type == BOARD_XSURF)
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old_drvdata = dev_get_drvdata(&z->dev);
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/* allocate host */
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host = ata_host_alloc(&z->dev, nr_ports);
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if (type == BOARD_XSURF)
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dev_set_drvdata(&z->dev, old_drvdata);
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if (!host)
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return -ENXIO;
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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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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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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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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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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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/* 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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ap->pio_mask = ATA_PIO4;
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ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
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buddha_board = ZTWO_VADDR(board);
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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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/* 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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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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ata_host_activate(host, IRQ_AMIGA_PORTS, ata_sff_interrupt,
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IRQF_SHARED, &pata_buddha_sht);
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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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return 0;
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}
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module_init(pata_buddha_init_one);
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static void pata_buddha_remove(struct zorro_dev *z)
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{
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struct ata_host *host = dev_get_drvdata(&z->dev);
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ata_host_detach(host);
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}
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static const struct zorro_device_id pata_buddha_zorro_tbl[] = {
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{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA, BOARD_BUDDHA},
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{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_CATWEASEL, BOARD_CATWEASEL},
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{ 0 }
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};
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MODULE_DEVICE_TABLE(zorro, pata_buddha_zorro_tbl);
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static struct zorro_driver pata_buddha_driver = {
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.name = "pata_buddha",
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.id_table = pata_buddha_zorro_tbl,
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.probe = pata_buddha_probe,
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.remove = pata_buddha_remove,
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};
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/*
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* We cannot have a modalias for X-Surf boards, as it competes with the
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* zorro8390 network driver. As a stopgap measure until we have proper
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* MFD support for this board, we manually attach to it late after Zorro
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* has enumerated its boards.
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*/
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static int __init pata_buddha_late_init(void)
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{
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struct zorro_dev *z = NULL;
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/* Auto-bind to regular boards */
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zorro_register_driver(&pata_buddha_driver);
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/* Manually bind to all X-Surf boards */
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while ((z = zorro_find_device(ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, z))) {
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static struct zorro_device_id xsurf_ent = {
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ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, BOARD_XSURF
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};
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pata_buddha_probe(z, &xsurf_ent);
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}
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return 0;
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}
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late_initcall(pata_buddha_late_init);
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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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