[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/block/swim3.c b/ap/os/linux/linux-3.4.x/drivers/block/swim3.c
new file mode 100644
index 0000000..89ddab1
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/block/swim3.c
@@ -0,0 +1,1282 @@
+/*
+ * Driver for the SWIM3 (Super Woz Integrated Machine 3)
+ * floppy controller found on Power Macintoshes.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/*
+ * TODO:
+ * handle 2 drives
+ * handle GCR disks
+ */
+
+#undef DEBUG
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/fd.h>
+#include <linux/ioctl.h>
+#include <linux/blkdev.h>
+#include <linux/interrupt.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <asm/io.h>
+#include <asm/dbdma.h>
+#include <asm/prom.h>
+#include <asm/uaccess.h>
+#include <asm/mediabay.h>
+#include <asm/machdep.h>
+#include <asm/pmac_feature.h>
+
+#define MAX_FLOPPIES 2
+
+static DEFINE_MUTEX(swim3_mutex);
+static struct gendisk *disks[MAX_FLOPPIES];
+
+enum swim_state {
+ idle,
+ locating,
+ seeking,
+ settling,
+ do_transfer,
+ jogging,
+ available,
+ revalidating,
+ ejecting
+};
+
+#define REG(x) unsigned char x; char x ## _pad[15];
+
+/*
+ * The names for these registers mostly represent speculation on my part.
+ * It will be interesting to see how close they are to the names Apple uses.
+ */
+struct swim3 {
+ REG(data);
+ REG(timer); /* counts down at 1MHz */
+ REG(error);
+ REG(mode);
+ REG(select); /* controls CA0, CA1, CA2 and LSTRB signals */
+ REG(setup);
+ REG(control); /* writing bits clears them */
+ REG(status); /* writing bits sets them in control */
+ REG(intr);
+ REG(nseek); /* # tracks to seek */
+ REG(ctrack); /* current track number */
+ REG(csect); /* current sector number */
+ REG(gap3); /* size of gap 3 in track format */
+ REG(sector); /* sector # to read or write */
+ REG(nsect); /* # sectors to read or write */
+ REG(intr_enable);
+};
+
+#define control_bic control
+#define control_bis status
+
+/* Bits in select register */
+#define CA_MASK 7
+#define LSTRB 8
+
+/* Bits in control register */
+#define DO_SEEK 0x80
+#define FORMAT 0x40
+#define SELECT 0x20
+#define WRITE_SECTORS 0x10
+#define DO_ACTION 0x08
+#define DRIVE2_ENABLE 0x04
+#define DRIVE_ENABLE 0x02
+#define INTR_ENABLE 0x01
+
+/* Bits in status register */
+#define FIFO_1BYTE 0x80
+#define FIFO_2BYTE 0x40
+#define ERROR 0x20
+#define DATA 0x08
+#define RDDATA 0x04
+#define INTR_PENDING 0x02
+#define MARK_BYTE 0x01
+
+/* Bits in intr and intr_enable registers */
+#define ERROR_INTR 0x20
+#define DATA_CHANGED 0x10
+#define TRANSFER_DONE 0x08
+#define SEEN_SECTOR 0x04
+#define SEEK_DONE 0x02
+#define TIMER_DONE 0x01
+
+/* Bits in error register */
+#define ERR_DATA_CRC 0x80
+#define ERR_ADDR_CRC 0x40
+#define ERR_OVERRUN 0x04
+#define ERR_UNDERRUN 0x01
+
+/* Bits in setup register */
+#define S_SW_RESET 0x80
+#define S_GCR_WRITE 0x40
+#define S_IBM_DRIVE 0x20
+#define S_TEST_MODE 0x10
+#define S_FCLK_DIV2 0x08
+#define S_GCR 0x04
+#define S_COPY_PROT 0x02
+#define S_INV_WDATA 0x01
+
+/* Select values for swim3_action */
+#define SEEK_POSITIVE 0
+#define SEEK_NEGATIVE 4
+#define STEP 1
+#define MOTOR_ON 2
+#define MOTOR_OFF 6
+#define INDEX 3
+#define EJECT 7
+#define SETMFM 9
+#define SETGCR 13
+
+/* Select values for swim3_select and swim3_readbit */
+#define STEP_DIR 0
+#define STEPPING 1
+#define MOTOR_ON 2
+#define RELAX 3 /* also eject in progress */
+#define READ_DATA_0 4
+#define TWOMEG_DRIVE 5
+#define SINGLE_SIDED 6 /* drive or diskette is 4MB type? */
+#define DRIVE_PRESENT 7
+#define DISK_IN 8
+#define WRITE_PROT 9
+#define TRACK_ZERO 10
+#define TACHO 11
+#define READ_DATA_1 12
+#define MFM_MODE 13
+#define SEEK_COMPLETE 14
+#define ONEMEG_MEDIA 15
+
+/* Definitions of values used in writing and formatting */
+#define DATA_ESCAPE 0x99
+#define GCR_SYNC_EXC 0x3f
+#define GCR_SYNC_CONV 0x80
+#define GCR_FIRST_MARK 0xd5
+#define GCR_SECOND_MARK 0xaa
+#define GCR_ADDR_MARK "\xd5\xaa\x00"
+#define GCR_DATA_MARK "\xd5\xaa\x0b"
+#define GCR_SLIP_BYTE "\x27\xaa"
+#define GCR_SELF_SYNC "\x3f\xbf\x1e\x34\x3c\x3f"
+
+#define DATA_99 "\x99\x99"
+#define MFM_ADDR_MARK "\x99\xa1\x99\xa1\x99\xa1\x99\xfe"
+#define MFM_INDEX_MARK "\x99\xc2\x99\xc2\x99\xc2\x99\xfc"
+#define MFM_GAP_LEN 12
+
+struct floppy_state {
+ enum swim_state state;
+ struct swim3 __iomem *swim3; /* hardware registers */
+ struct dbdma_regs __iomem *dma; /* DMA controller registers */
+ int swim3_intr; /* interrupt number for SWIM3 */
+ int dma_intr; /* interrupt number for DMA channel */
+ int cur_cyl; /* cylinder head is on, or -1 */
+ int cur_sector; /* last sector we saw go past */
+ int req_cyl; /* the cylinder for the current r/w request */
+ int head; /* head number ditto */
+ int req_sector; /* sector number ditto */
+ int scount; /* # sectors we're transferring at present */
+ int retries;
+ int settle_time;
+ int secpercyl; /* disk geometry information */
+ int secpertrack;
+ int total_secs;
+ int write_prot; /* 1 if write-protected, 0 if not, -1 dunno */
+ struct dbdma_cmd *dma_cmd;
+ int ref_count;
+ int expect_cyl;
+ struct timer_list timeout;
+ int timeout_pending;
+ int ejected;
+ wait_queue_head_t wait;
+ int wanted;
+ struct macio_dev *mdev;
+ char dbdma_cmd_space[5 * sizeof(struct dbdma_cmd)];
+ int index;
+ struct request *cur_req;
+};
+
+#define swim3_err(fmt, arg...) dev_err(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
+#define swim3_warn(fmt, arg...) dev_warn(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
+#define swim3_info(fmt, arg...) dev_info(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
+
+#ifdef DEBUG
+#define swim3_dbg(fmt, arg...) dev_dbg(&fs->mdev->ofdev.dev, "[fd%d] " fmt, fs->index, arg)
+#else
+#define swim3_dbg(fmt, arg...) do { } while(0)
+#endif
+
+static struct floppy_state floppy_states[MAX_FLOPPIES];
+static int floppy_count = 0;
+static DEFINE_SPINLOCK(swim3_lock);
+
+static unsigned short write_preamble[] = {
+ 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, 0x4e4e, /* gap field */
+ 0, 0, 0, 0, 0, 0, /* sync field */
+ 0x99a1, 0x99a1, 0x99a1, 0x99fb, /* data address mark */
+ 0x990f /* no escape for 512 bytes */
+};
+
+static unsigned short write_postamble[] = {
+ 0x9904, /* insert CRC */
+ 0x4e4e, 0x4e4e,
+ 0x9908, /* stop writing */
+ 0, 0, 0, 0, 0, 0
+};
+
+static void seek_track(struct floppy_state *fs, int n);
+static void init_dma(struct dbdma_cmd *cp, int cmd, void *buf, int count);
+static void act(struct floppy_state *fs);
+static void scan_timeout(unsigned long data);
+static void seek_timeout(unsigned long data);
+static void settle_timeout(unsigned long data);
+static void xfer_timeout(unsigned long data);
+static irqreturn_t swim3_interrupt(int irq, void *dev_id);
+/*static void fd_dma_interrupt(int irq, void *dev_id);*/
+static int grab_drive(struct floppy_state *fs, enum swim_state state,
+ int interruptible);
+static void release_drive(struct floppy_state *fs);
+static int fd_eject(struct floppy_state *fs);
+static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long param);
+static int floppy_open(struct block_device *bdev, fmode_t mode);
+static int floppy_release(struct gendisk *disk, fmode_t mode);
+static unsigned int floppy_check_events(struct gendisk *disk,
+ unsigned int clearing);
+static int floppy_revalidate(struct gendisk *disk);
+
+static bool swim3_end_request(struct floppy_state *fs, int err, unsigned int nr_bytes)
+{
+ struct request *req = fs->cur_req;
+ int rc;
+
+ swim3_dbg(" end request, err=%d nr_bytes=%d, cur_req=%p\n",
+ err, nr_bytes, req);
+
+ if (err)
+ nr_bytes = blk_rq_cur_bytes(req);
+ rc = __blk_end_request(req, err, nr_bytes);
+ if (rc)
+ return true;
+ fs->cur_req = NULL;
+ return false;
+}
+
+static void swim3_select(struct floppy_state *fs, int sel)
+{
+ struct swim3 __iomem *sw = fs->swim3;
+
+ out_8(&sw->select, RELAX);
+ if (sel & 8)
+ out_8(&sw->control_bis, SELECT);
+ else
+ out_8(&sw->control_bic, SELECT);
+ out_8(&sw->select, sel & CA_MASK);
+}
+
+static void swim3_action(struct floppy_state *fs, int action)
+{
+ struct swim3 __iomem *sw = fs->swim3;
+
+ swim3_select(fs, action);
+ udelay(1);
+ out_8(&sw->select, sw->select | LSTRB);
+ udelay(2);
+ out_8(&sw->select, sw->select & ~LSTRB);
+ udelay(1);
+}
+
+static int swim3_readbit(struct floppy_state *fs, int bit)
+{
+ struct swim3 __iomem *sw = fs->swim3;
+ int stat;
+
+ swim3_select(fs, bit);
+ udelay(1);
+ stat = in_8(&sw->status);
+ return (stat & DATA) == 0;
+}
+
+static void start_request(struct floppy_state *fs)
+{
+ struct request *req;
+ unsigned long x;
+
+ swim3_dbg("start request, initial state=%d\n", fs->state);
+
+ if (fs->state == idle && fs->wanted) {
+ fs->state = available;
+ wake_up(&fs->wait);
+ return;
+ }
+ while (fs->state == idle) {
+ swim3_dbg("start request, idle loop, cur_req=%p\n", fs->cur_req);
+ if (!fs->cur_req) {
+ fs->cur_req = blk_fetch_request(disks[fs->index]->queue);
+ swim3_dbg(" fetched request %p\n", fs->cur_req);
+ if (!fs->cur_req)
+ break;
+ }
+ req = fs->cur_req;
+
+ if (fs->mdev->media_bay &&
+ check_media_bay(fs->mdev->media_bay) != MB_FD) {
+ swim3_dbg("%s", " media bay absent, dropping req\n");
+ swim3_end_request(fs, -ENODEV, 0);
+ continue;
+ }
+
+#if 0 /* This is really too verbose */
+ swim3_dbg("do_fd_req: dev=%s cmd=%d sec=%ld nr_sec=%u buf=%p\n",
+ req->rq_disk->disk_name, req->cmd,
+ (long)blk_rq_pos(req), blk_rq_sectors(req),
+ req->buffer);
+ swim3_dbg(" errors=%d current_nr_sectors=%u\n",
+ req->errors, blk_rq_cur_sectors(req));
+#endif
+
+ if (blk_rq_pos(req) >= fs->total_secs) {
+ swim3_dbg(" pos out of bounds (%ld, max is %ld)\n",
+ (long)blk_rq_pos(req), (long)fs->total_secs);
+ swim3_end_request(fs, -EIO, 0);
+ continue;
+ }
+ if (fs->ejected) {
+ swim3_dbg("%s", " disk ejected\n");
+ swim3_end_request(fs, -EIO, 0);
+ continue;
+ }
+
+ if (rq_data_dir(req) == WRITE) {
+ if (fs->write_prot < 0)
+ fs->write_prot = swim3_readbit(fs, WRITE_PROT);
+ if (fs->write_prot) {
+ swim3_dbg("%s", " try to write, disk write protected\n");
+ swim3_end_request(fs, -EIO, 0);
+ continue;
+ }
+ }
+
+ /* Do not remove the cast. blk_rq_pos(req) is now a
+ * sector_t and can be 64 bits, but it will never go
+ * past 32 bits for this driver anyway, so we can
+ * safely cast it down and not have to do a 64/32
+ * division
+ */
+ fs->req_cyl = ((long)blk_rq_pos(req)) / fs->secpercyl;
+ x = ((long)blk_rq_pos(req)) % fs->secpercyl;
+ fs->head = x / fs->secpertrack;
+ fs->req_sector = x % fs->secpertrack + 1;
+ fs->state = do_transfer;
+ fs->retries = 0;
+
+ act(fs);
+ }
+}
+
+static void do_fd_request(struct request_queue * q)
+{
+ start_request(q->queuedata);
+}
+
+static void set_timeout(struct floppy_state *fs, int nticks,
+ void (*proc)(unsigned long))
+{
+ if (fs->timeout_pending)
+ del_timer(&fs->timeout);
+ fs->timeout.expires = jiffies + nticks;
+ fs->timeout.function = proc;
+ fs->timeout.data = (unsigned long) fs;
+ add_timer(&fs->timeout);
+ fs->timeout_pending = 1;
+}
+
+static inline void scan_track(struct floppy_state *fs)
+{
+ struct swim3 __iomem *sw = fs->swim3;
+
+ swim3_select(fs, READ_DATA_0);
+ in_8(&sw->intr); /* clear SEEN_SECTOR bit */
+ in_8(&sw->error);
+ out_8(&sw->intr_enable, SEEN_SECTOR);
+ out_8(&sw->control_bis, DO_ACTION);
+ /* enable intr when track found */
+ set_timeout(fs, HZ, scan_timeout); /* enable timeout */
+}
+
+static inline void seek_track(struct floppy_state *fs, int n)
+{
+ struct swim3 __iomem *sw = fs->swim3;
+
+ if (n >= 0) {
+ swim3_action(fs, SEEK_POSITIVE);
+ sw->nseek = n;
+ } else {
+ swim3_action(fs, SEEK_NEGATIVE);
+ sw->nseek = -n;
+ }
+ fs->expect_cyl = (fs->cur_cyl >= 0)? fs->cur_cyl + n: -1;
+ swim3_select(fs, STEP);
+ in_8(&sw->error);
+ /* enable intr when seek finished */
+ out_8(&sw->intr_enable, SEEK_DONE);
+ out_8(&sw->control_bis, DO_SEEK);
+ set_timeout(fs, 3*HZ, seek_timeout); /* enable timeout */
+ fs->settle_time = 0;
+}
+
+static inline void init_dma(struct dbdma_cmd *cp, int cmd,
+ void *buf, int count)
+{
+ st_le16(&cp->req_count, count);
+ st_le16(&cp->command, cmd);
+ st_le32(&cp->phy_addr, virt_to_bus(buf));
+ cp->xfer_status = 0;
+}
+
+static inline void setup_transfer(struct floppy_state *fs)
+{
+ int n;
+ struct swim3 __iomem *sw = fs->swim3;
+ struct dbdma_cmd *cp = fs->dma_cmd;
+ struct dbdma_regs __iomem *dr = fs->dma;
+ struct request *req = fs->cur_req;
+
+ if (blk_rq_cur_sectors(req) <= 0) {
+ swim3_warn("%s", "Transfer 0 sectors ?\n");
+ return;
+ }
+ if (rq_data_dir(req) == WRITE)
+ n = 1;
+ else {
+ n = fs->secpertrack - fs->req_sector + 1;
+ if (n > blk_rq_cur_sectors(req))
+ n = blk_rq_cur_sectors(req);
+ }
+
+ swim3_dbg(" setup xfer at sect %d (of %d) head %d for %d\n",
+ fs->req_sector, fs->secpertrack, fs->head, n);
+
+ fs->scount = n;
+ swim3_select(fs, fs->head? READ_DATA_1: READ_DATA_0);
+ out_8(&sw->sector, fs->req_sector);
+ out_8(&sw->nsect, n);
+ out_8(&sw->gap3, 0);
+ out_le32(&dr->cmdptr, virt_to_bus(cp));
+ if (rq_data_dir(req) == WRITE) {
+ /* Set up 3 dma commands: write preamble, data, postamble */
+ init_dma(cp, OUTPUT_MORE, write_preamble, sizeof(write_preamble));
+ ++cp;
+ init_dma(cp, OUTPUT_MORE, req->buffer, 512);
+ ++cp;
+ init_dma(cp, OUTPUT_LAST, write_postamble, sizeof(write_postamble));
+ } else {
+ init_dma(cp, INPUT_LAST, req->buffer, n * 512);
+ }
+ ++cp;
+ out_le16(&cp->command, DBDMA_STOP);
+ out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
+ in_8(&sw->error);
+ out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
+ if (rq_data_dir(req) == WRITE)
+ out_8(&sw->control_bis, WRITE_SECTORS);
+ in_8(&sw->intr);
+ out_le32(&dr->control, (RUN << 16) | RUN);
+ /* enable intr when transfer complete */
+ out_8(&sw->intr_enable, TRANSFER_DONE);
+ out_8(&sw->control_bis, DO_ACTION);
+ set_timeout(fs, 2*HZ, xfer_timeout); /* enable timeout */
+}
+
+static void act(struct floppy_state *fs)
+{
+ for (;;) {
+ swim3_dbg(" act loop, state=%d, req_cyl=%d, cur_cyl=%d\n",
+ fs->state, fs->req_cyl, fs->cur_cyl);
+
+ switch (fs->state) {
+ case idle:
+ return; /* XXX shouldn't get here */
+
+ case locating:
+ if (swim3_readbit(fs, TRACK_ZERO)) {
+ swim3_dbg("%s", " locate track 0\n");
+ fs->cur_cyl = 0;
+ if (fs->req_cyl == 0)
+ fs->state = do_transfer;
+ else
+ fs->state = seeking;
+ break;
+ }
+ scan_track(fs);
+ return;
+
+ case seeking:
+ if (fs->cur_cyl < 0) {
+ fs->expect_cyl = -1;
+ fs->state = locating;
+ break;
+ }
+ if (fs->req_cyl == fs->cur_cyl) {
+ swim3_warn("%s", "Whoops, seeking 0\n");
+ fs->state = do_transfer;
+ break;
+ }
+ seek_track(fs, fs->req_cyl - fs->cur_cyl);
+ return;
+
+ case settling:
+ /* check for SEEK_COMPLETE after 30ms */
+ fs->settle_time = (HZ + 32) / 33;
+ set_timeout(fs, fs->settle_time, settle_timeout);
+ return;
+
+ case do_transfer:
+ if (fs->cur_cyl != fs->req_cyl) {
+ if (fs->retries > 5) {
+ swim3_err("Wrong cylinder in transfer, want: %d got %d\n",
+ fs->req_cyl, fs->cur_cyl);
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ return;
+ }
+ fs->state = seeking;
+ break;
+ }
+ setup_transfer(fs);
+ return;
+
+ case jogging:
+ seek_track(fs, -5);
+ return;
+
+ default:
+ swim3_err("Unknown state %d\n", fs->state);
+ return;
+ }
+ }
+}
+
+static void scan_timeout(unsigned long data)
+{
+ struct floppy_state *fs = (struct floppy_state *) data;
+ struct swim3 __iomem *sw = fs->swim3;
+ unsigned long flags;
+
+ swim3_dbg("* scan timeout, state=%d\n", fs->state);
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ fs->timeout_pending = 0;
+ out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
+ out_8(&sw->select, RELAX);
+ out_8(&sw->intr_enable, 0);
+ fs->cur_cyl = -1;
+ if (fs->retries > 5) {
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ } else {
+ fs->state = jogging;
+ act(fs);
+ }
+ spin_unlock_irqrestore(&swim3_lock, flags);
+}
+
+static void seek_timeout(unsigned long data)
+{
+ struct floppy_state *fs = (struct floppy_state *) data;
+ struct swim3 __iomem *sw = fs->swim3;
+ unsigned long flags;
+
+ swim3_dbg("* seek timeout, state=%d\n", fs->state);
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ fs->timeout_pending = 0;
+ out_8(&sw->control_bic, DO_SEEK);
+ out_8(&sw->select, RELAX);
+ out_8(&sw->intr_enable, 0);
+ swim3_err("%s", "Seek timeout\n");
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ spin_unlock_irqrestore(&swim3_lock, flags);
+}
+
+static void settle_timeout(unsigned long data)
+{
+ struct floppy_state *fs = (struct floppy_state *) data;
+ struct swim3 __iomem *sw = fs->swim3;
+ unsigned long flags;
+
+ swim3_dbg("* settle timeout, state=%d\n", fs->state);
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ fs->timeout_pending = 0;
+ if (swim3_readbit(fs, SEEK_COMPLETE)) {
+ out_8(&sw->select, RELAX);
+ fs->state = locating;
+ act(fs);
+ goto unlock;
+ }
+ out_8(&sw->select, RELAX);
+ if (fs->settle_time < 2*HZ) {
+ ++fs->settle_time;
+ set_timeout(fs, 1, settle_timeout);
+ goto unlock;
+ }
+ swim3_err("%s", "Seek settle timeout\n");
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ unlock:
+ spin_unlock_irqrestore(&swim3_lock, flags);
+}
+
+static void xfer_timeout(unsigned long data)
+{
+ struct floppy_state *fs = (struct floppy_state *) data;
+ struct swim3 __iomem *sw = fs->swim3;
+ struct dbdma_regs __iomem *dr = fs->dma;
+ unsigned long flags;
+ int n;
+
+ swim3_dbg("* xfer timeout, state=%d\n", fs->state);
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ fs->timeout_pending = 0;
+ out_le32(&dr->control, RUN << 16);
+ /* We must wait a bit for dbdma to stop */
+ for (n = 0; (in_le32(&dr->status) & ACTIVE) && n < 1000; n++)
+ udelay(1);
+ out_8(&sw->intr_enable, 0);
+ out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
+ out_8(&sw->select, RELAX);
+ swim3_err("Timeout %sing sector %ld\n",
+ (rq_data_dir(fs->cur_req)==WRITE? "writ": "read"),
+ (long)blk_rq_pos(fs->cur_req));
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ spin_unlock_irqrestore(&swim3_lock, flags);
+}
+
+static irqreturn_t swim3_interrupt(int irq, void *dev_id)
+{
+ struct floppy_state *fs = (struct floppy_state *) dev_id;
+ struct swim3 __iomem *sw = fs->swim3;
+ int intr, err, n;
+ int stat, resid;
+ struct dbdma_regs __iomem *dr;
+ struct dbdma_cmd *cp;
+ unsigned long flags;
+ struct request *req = fs->cur_req;
+
+ swim3_dbg("* interrupt, state=%d\n", fs->state);
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ intr = in_8(&sw->intr);
+ err = (intr & ERROR_INTR)? in_8(&sw->error): 0;
+ if ((intr & ERROR_INTR) && fs->state != do_transfer)
+ swim3_err("Non-transfer error interrupt: state=%d, dir=%x, intr=%x, err=%x\n",
+ fs->state, rq_data_dir(req), intr, err);
+ switch (fs->state) {
+ case locating:
+ if (intr & SEEN_SECTOR) {
+ out_8(&sw->control_bic, DO_ACTION | WRITE_SECTORS);
+ out_8(&sw->select, RELAX);
+ out_8(&sw->intr_enable, 0);
+ del_timer(&fs->timeout);
+ fs->timeout_pending = 0;
+ if (sw->ctrack == 0xff) {
+ swim3_err("%s", "Seen sector but cyl=ff?\n");
+ fs->cur_cyl = -1;
+ if (fs->retries > 5) {
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ } else {
+ fs->state = jogging;
+ act(fs);
+ }
+ break;
+ }
+ fs->cur_cyl = sw->ctrack;
+ fs->cur_sector = sw->csect;
+ if (fs->expect_cyl != -1 && fs->expect_cyl != fs->cur_cyl)
+ swim3_err("Expected cyl %d, got %d\n",
+ fs->expect_cyl, fs->cur_cyl);
+ fs->state = do_transfer;
+ act(fs);
+ }
+ break;
+ case seeking:
+ case jogging:
+ if (sw->nseek == 0) {
+ out_8(&sw->control_bic, DO_SEEK);
+ out_8(&sw->select, RELAX);
+ out_8(&sw->intr_enable, 0);
+ del_timer(&fs->timeout);
+ fs->timeout_pending = 0;
+ if (fs->state == seeking)
+ ++fs->retries;
+ fs->state = settling;
+ act(fs);
+ }
+ break;
+ case settling:
+ out_8(&sw->intr_enable, 0);
+ del_timer(&fs->timeout);
+ fs->timeout_pending = 0;
+ act(fs);
+ break;
+ case do_transfer:
+ if ((intr & (ERROR_INTR | TRANSFER_DONE)) == 0)
+ break;
+ out_8(&sw->intr_enable, 0);
+ out_8(&sw->control_bic, WRITE_SECTORS | DO_ACTION);
+ out_8(&sw->select, RELAX);
+ del_timer(&fs->timeout);
+ fs->timeout_pending = 0;
+ dr = fs->dma;
+ cp = fs->dma_cmd;
+ if (rq_data_dir(req) == WRITE)
+ ++cp;
+ /*
+ * Check that the main data transfer has finished.
+ * On writing, the swim3 sometimes doesn't use
+ * up all the bytes of the postamble, so we can still
+ * see DMA active here. That doesn't matter as long
+ * as all the sector data has been transferred.
+ */
+ if ((intr & ERROR_INTR) == 0 && cp->xfer_status == 0) {
+ /* wait a little while for DMA to complete */
+ for (n = 0; n < 100; ++n) {
+ if (cp->xfer_status != 0)
+ break;
+ udelay(1);
+ barrier();
+ }
+ }
+ /* turn off DMA */
+ out_le32(&dr->control, (RUN | PAUSE) << 16);
+ stat = ld_le16(&cp->xfer_status);
+ resid = ld_le16(&cp->res_count);
+ if (intr & ERROR_INTR) {
+ n = fs->scount - 1 - resid / 512;
+ if (n > 0) {
+ blk_update_request(req, 0, n << 9);
+ fs->req_sector += n;
+ }
+ if (fs->retries < 5) {
+ ++fs->retries;
+ act(fs);
+ } else {
+ swim3_err("Error %sing block %ld (err=%x)\n",
+ rq_data_dir(req) == WRITE? "writ": "read",
+ (long)blk_rq_pos(req), err);
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ }
+ } else {
+ if ((stat & ACTIVE) == 0 || resid != 0) {
+ /* musta been an error */
+ swim3_err("fd dma error: stat=%x resid=%d\n", stat, resid);
+ swim3_err(" state=%d, dir=%x, intr=%x, err=%x\n",
+ fs->state, rq_data_dir(req), intr, err);
+ swim3_end_request(fs, -EIO, 0);
+ fs->state = idle;
+ start_request(fs);
+ break;
+ }
+ fs->retries = 0;
+ if (swim3_end_request(fs, 0, fs->scount << 9)) {
+ fs->req_sector += fs->scount;
+ if (fs->req_sector > fs->secpertrack) {
+ fs->req_sector -= fs->secpertrack;
+ if (++fs->head > 1) {
+ fs->head = 0;
+ ++fs->req_cyl;
+ }
+ }
+ act(fs);
+ } else
+ fs->state = idle;
+ }
+ if (fs->state == idle)
+ start_request(fs);
+ break;
+ default:
+ swim3_err("Don't know what to do in state %d\n", fs->state);
+ }
+ spin_unlock_irqrestore(&swim3_lock, flags);
+ return IRQ_HANDLED;
+}
+
+/*
+static void fd_dma_interrupt(int irq, void *dev_id)
+{
+}
+*/
+
+/* Called under the mutex to grab exclusive access to a drive */
+static int grab_drive(struct floppy_state *fs, enum swim_state state,
+ int interruptible)
+{
+ unsigned long flags;
+
+ swim3_dbg("%s", "-> grab drive\n");
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ if (fs->state != idle && fs->state != available) {
+ ++fs->wanted;
+ while (fs->state != available) {
+ spin_unlock_irqrestore(&swim3_lock, flags);
+ if (interruptible && signal_pending(current)) {
+ --fs->wanted;
+ return -EINTR;
+ }
+ interruptible_sleep_on(&fs->wait);
+ spin_lock_irqsave(&swim3_lock, flags);
+ }
+ --fs->wanted;
+ }
+ fs->state = state;
+ spin_unlock_irqrestore(&swim3_lock, flags);
+
+ return 0;
+}
+
+static void release_drive(struct floppy_state *fs)
+{
+ unsigned long flags;
+
+ swim3_dbg("%s", "-> release drive\n");
+
+ spin_lock_irqsave(&swim3_lock, flags);
+ fs->state = idle;
+ start_request(fs);
+ spin_unlock_irqrestore(&swim3_lock, flags);
+}
+
+static int fd_eject(struct floppy_state *fs)
+{
+ int err, n;
+
+ err = grab_drive(fs, ejecting, 1);
+ if (err)
+ return err;
+ swim3_action(fs, EJECT);
+ for (n = 20; n > 0; --n) {
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ swim3_select(fs, RELAX);
+ schedule_timeout_interruptible(1);
+ if (swim3_readbit(fs, DISK_IN) == 0)
+ break;
+ }
+ swim3_select(fs, RELAX);
+ udelay(150);
+ fs->ejected = 1;
+ release_drive(fs);
+ return err;
+}
+
+static struct floppy_struct floppy_type =
+ { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,NULL }; /* 7 1.44MB 3.5" */
+
+static int floppy_locked_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long param)
+{
+ struct floppy_state *fs = bdev->bd_disk->private_data;
+ int err;
+
+ if ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (fs->mdev->media_bay &&
+ check_media_bay(fs->mdev->media_bay) != MB_FD)
+ return -ENXIO;
+
+ switch (cmd) {
+ case FDEJECT:
+ if (fs->ref_count != 1)
+ return -EBUSY;
+ err = fd_eject(fs);
+ return err;
+ case FDGETPRM:
+ if (copy_to_user((void __user *) param, &floppy_type,
+ sizeof(struct floppy_struct)))
+ return -EFAULT;
+ return 0;
+ }
+ return -ENOTTY;
+}
+
+static int floppy_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long param)
+{
+ int ret;
+
+ mutex_lock(&swim3_mutex);
+ ret = floppy_locked_ioctl(bdev, mode, cmd, param);
+ mutex_unlock(&swim3_mutex);
+
+ return ret;
+}
+
+static int floppy_open(struct block_device *bdev, fmode_t mode)
+{
+ struct floppy_state *fs = bdev->bd_disk->private_data;
+ struct swim3 __iomem *sw = fs->swim3;
+ int n, err = 0;
+
+ if (fs->ref_count == 0) {
+ if (fs->mdev->media_bay &&
+ check_media_bay(fs->mdev->media_bay) != MB_FD)
+ return -ENXIO;
+ out_8(&sw->setup, S_IBM_DRIVE | S_FCLK_DIV2);
+ out_8(&sw->control_bic, 0xff);
+ out_8(&sw->mode, 0x95);
+ udelay(10);
+ out_8(&sw->intr_enable, 0);
+ out_8(&sw->control_bis, DRIVE_ENABLE | INTR_ENABLE);
+ swim3_action(fs, MOTOR_ON);
+ fs->write_prot = -1;
+ fs->cur_cyl = -1;
+ for (n = 0; n < 2 * HZ; ++n) {
+ if (n >= HZ/30 && swim3_readbit(fs, SEEK_COMPLETE))
+ break;
+ if (signal_pending(current)) {
+ err = -EINTR;
+ break;
+ }
+ swim3_select(fs, RELAX);
+ schedule_timeout_interruptible(1);
+ }
+ if (err == 0 && (swim3_readbit(fs, SEEK_COMPLETE) == 0
+ || swim3_readbit(fs, DISK_IN) == 0))
+ err = -ENXIO;
+ swim3_action(fs, SETMFM);
+ swim3_select(fs, RELAX);
+
+ } else if (fs->ref_count == -1 || mode & FMODE_EXCL)
+ return -EBUSY;
+
+ if (err == 0 && (mode & FMODE_NDELAY) == 0
+ && (mode & (FMODE_READ|FMODE_WRITE))) {
+ check_disk_change(bdev);
+ if (fs->ejected)
+ err = -ENXIO;
+ }
+
+ if (err == 0 && (mode & FMODE_WRITE)) {
+ if (fs->write_prot < 0)
+ fs->write_prot = swim3_readbit(fs, WRITE_PROT);
+ if (fs->write_prot)
+ err = -EROFS;
+ }
+
+ if (err) {
+ if (fs->ref_count == 0) {
+ swim3_action(fs, MOTOR_OFF);
+ out_8(&sw->control_bic, DRIVE_ENABLE | INTR_ENABLE);
+ swim3_select(fs, RELAX);
+ }
+ return err;
+ }
+
+ if (mode & FMODE_EXCL)
+ fs->ref_count = -1;
+ else
+ ++fs->ref_count;
+
+ return 0;
+}
+
+static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode)
+{
+ int ret;
+
+ mutex_lock(&swim3_mutex);
+ ret = floppy_open(bdev, mode);
+ mutex_unlock(&swim3_mutex);
+
+ return ret;
+}
+
+static int floppy_release(struct gendisk *disk, fmode_t mode)
+{
+ struct floppy_state *fs = disk->private_data;
+ struct swim3 __iomem *sw = fs->swim3;
+
+ mutex_lock(&swim3_mutex);
+ if (fs->ref_count > 0 && --fs->ref_count == 0) {
+ swim3_action(fs, MOTOR_OFF);
+ out_8(&sw->control_bic, 0xff);
+ swim3_select(fs, RELAX);
+ }
+ mutex_unlock(&swim3_mutex);
+ return 0;
+}
+
+static unsigned int floppy_check_events(struct gendisk *disk,
+ unsigned int clearing)
+{
+ struct floppy_state *fs = disk->private_data;
+ return fs->ejected ? DISK_EVENT_MEDIA_CHANGE : 0;
+}
+
+static int floppy_revalidate(struct gendisk *disk)
+{
+ struct floppy_state *fs = disk->private_data;
+ struct swim3 __iomem *sw;
+ int ret, n;
+
+ if (fs->mdev->media_bay &&
+ check_media_bay(fs->mdev->media_bay) != MB_FD)
+ return -ENXIO;
+
+ sw = fs->swim3;
+ grab_drive(fs, revalidating, 0);
+ out_8(&sw->intr_enable, 0);
+ out_8(&sw->control_bis, DRIVE_ENABLE);
+ swim3_action(fs, MOTOR_ON); /* necessary? */
+ fs->write_prot = -1;
+ fs->cur_cyl = -1;
+ mdelay(1);
+ for (n = HZ; n > 0; --n) {
+ if (swim3_readbit(fs, SEEK_COMPLETE))
+ break;
+ if (signal_pending(current))
+ break;
+ swim3_select(fs, RELAX);
+ schedule_timeout_interruptible(1);
+ }
+ ret = swim3_readbit(fs, SEEK_COMPLETE) == 0
+ || swim3_readbit(fs, DISK_IN) == 0;
+ if (ret)
+ swim3_action(fs, MOTOR_OFF);
+ else {
+ fs->ejected = 0;
+ swim3_action(fs, SETMFM);
+ }
+ swim3_select(fs, RELAX);
+
+ release_drive(fs);
+ return ret;
+}
+
+static const struct block_device_operations floppy_fops = {
+ .open = floppy_unlocked_open,
+ .release = floppy_release,
+ .ioctl = floppy_ioctl,
+ .check_events = floppy_check_events,
+ .revalidate_disk= floppy_revalidate,
+};
+
+static void swim3_mb_event(struct macio_dev* mdev, int mb_state)
+{
+ struct floppy_state *fs = macio_get_drvdata(mdev);
+ struct swim3 __iomem *sw = fs->swim3;
+
+ if (!fs)
+ return;
+ if (mb_state != MB_FD)
+ return;
+
+ /* Clear state */
+ out_8(&sw->intr_enable, 0);
+ in_8(&sw->intr);
+ in_8(&sw->error);
+}
+
+static int swim3_add_device(struct macio_dev *mdev, int index)
+{
+ struct device_node *swim = mdev->ofdev.dev.of_node;
+ struct floppy_state *fs = &floppy_states[index];
+ int rc = -EBUSY;
+
+ /* Do this first for message macros */
+ memset(fs, 0, sizeof(*fs));
+ fs->mdev = mdev;
+ fs->index = index;
+
+ /* Check & Request resources */
+ if (macio_resource_count(mdev) < 2) {
+ swim3_err("%s", "No address in device-tree\n");
+ return -ENXIO;
+ }
+ if (macio_irq_count(mdev) < 1) {
+ swim3_err("%s", "No interrupt in device-tree\n");
+ return -ENXIO;
+ }
+ if (macio_request_resource(mdev, 0, "swim3 (mmio)")) {
+ swim3_err("%s", "Can't request mmio resource\n");
+ return -EBUSY;
+ }
+ if (macio_request_resource(mdev, 1, "swim3 (dma)")) {
+ swim3_err("%s", "Can't request dma resource\n");
+ macio_release_resource(mdev, 0);
+ return -EBUSY;
+ }
+ dev_set_drvdata(&mdev->ofdev.dev, fs);
+
+ if (mdev->media_bay == NULL)
+ pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 1);
+
+ fs->state = idle;
+ fs->swim3 = (struct swim3 __iomem *)
+ ioremap(macio_resource_start(mdev, 0), 0x200);
+ if (fs->swim3 == NULL) {
+ swim3_err("%s", "Couldn't map mmio registers\n");
+ rc = -ENOMEM;
+ goto out_release;
+ }
+ fs->dma = (struct dbdma_regs __iomem *)
+ ioremap(macio_resource_start(mdev, 1), 0x200);
+ if (fs->dma == NULL) {
+ swim3_err("%s", "Couldn't map dma registers\n");
+ iounmap(fs->swim3);
+ rc = -ENOMEM;
+ goto out_release;
+ }
+ fs->swim3_intr = macio_irq(mdev, 0);
+ fs->dma_intr = macio_irq(mdev, 1);
+ fs->cur_cyl = -1;
+ fs->cur_sector = -1;
+ fs->secpercyl = 36;
+ fs->secpertrack = 18;
+ fs->total_secs = 2880;
+ init_waitqueue_head(&fs->wait);
+
+ fs->dma_cmd = (struct dbdma_cmd *) DBDMA_ALIGN(fs->dbdma_cmd_space);
+ memset(fs->dma_cmd, 0, 2 * sizeof(struct dbdma_cmd));
+ st_le16(&fs->dma_cmd[1].command, DBDMA_STOP);
+
+ if (mdev->media_bay == NULL || check_media_bay(mdev->media_bay) == MB_FD)
+ swim3_mb_event(mdev, MB_FD);
+
+ if (request_irq(fs->swim3_intr, swim3_interrupt, 0, "SWIM3", fs)) {
+ swim3_err("%s", "Couldn't request interrupt\n");
+ pmac_call_feature(PMAC_FTR_SWIM3_ENABLE, swim, 0, 0);
+ goto out_unmap;
+ return -EBUSY;
+ }
+
+ init_timer(&fs->timeout);
+
+ swim3_info("SWIM3 floppy controller %s\n",
+ mdev->media_bay ? "in media bay" : "");
+
+ return 0;
+
+ out_unmap:
+ iounmap(fs->dma);
+ iounmap(fs->swim3);
+
+ out_release:
+ macio_release_resource(mdev, 0);
+ macio_release_resource(mdev, 1);
+
+ return rc;
+}
+
+static int __devinit swim3_attach(struct macio_dev *mdev, const struct of_device_id *match)
+{
+ struct gendisk *disk;
+ int index, rc;
+
+ index = floppy_count++;
+ if (index >= MAX_FLOPPIES)
+ return -ENXIO;
+
+ /* Add the drive */
+ rc = swim3_add_device(mdev, index);
+ if (rc)
+ return rc;
+ /* Now register that disk. Same comment about failure handling */
+ disk = disks[index] = alloc_disk(1);
+ if (disk == NULL)
+ return -ENOMEM;
+ disk->queue = blk_init_queue(do_fd_request, &swim3_lock);
+ if (disk->queue == NULL) {
+ put_disk(disk);
+ return -ENOMEM;
+ }
+ disk->queue->queuedata = &floppy_states[index];
+
+ if (index == 0) {
+ /* If we failed, there isn't much we can do as the driver is still
+ * too dumb to remove the device, just bail out
+ */
+ if (register_blkdev(FLOPPY_MAJOR, "fd"))
+ return 0;
+ }
+
+ disk->major = FLOPPY_MAJOR;
+ disk->first_minor = index;
+ disk->fops = &floppy_fops;
+ disk->private_data = &floppy_states[index];
+ disk->flags |= GENHD_FL_REMOVABLE;
+ sprintf(disk->disk_name, "fd%d", index);
+ set_capacity(disk, 2880);
+ add_disk(disk);
+
+ return 0;
+}
+
+static struct of_device_id swim3_match[] =
+{
+ {
+ .name = "swim3",
+ },
+ {
+ .compatible = "ohare-swim3"
+ },
+ {
+ .compatible = "swim3"
+ },
+ { /* end of list */ }
+};
+
+static struct macio_driver swim3_driver =
+{
+ .driver = {
+ .name = "swim3",
+ .of_match_table = swim3_match,
+ },
+ .probe = swim3_attach,
+#ifdef CONFIG_PMAC_MEDIABAY
+ .mediabay_event = swim3_mb_event,
+#endif
+#if 0
+ .suspend = swim3_suspend,
+ .resume = swim3_resume,
+#endif
+};
+
+
+int swim3_init(void)
+{
+ macio_register_driver(&swim3_driver);
+ return 0;
+}
+
+module_init(swim3_init)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Paul Mackerras");
+MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR);