#define REG_CTL_BASE0 0x3F6 /* control base register of controller 0 */
#define REG_CTL_BASE1 0x376 /* control base register of controller 1 */
+#define PCI_CTL_OFF 2 /* Offset of control registers from BAR2 */
+
#define REG_DATA 0 /* data register (offset from the base reg.) */
#define REG_PRECOMP 1 /* start of write precompensation */
#define REG_COUNT 2 /* sectors to transfer */
#define CTL_EIGHTHEADS 0x08 /* more than eight heads */
#define CTL_RESET 0x04 /* reset controller */
#define CTL_INTDISABLE 0x02 /* disable interrupts */
+#define REG_CTL_ALTSTAT 0 /* alternate status register */
+
+/* Identify words */
+#define ID_CAPABILITIES 0x31 /* Capabilities (49)*/
+#define ID_CAP_LBA 0x0200
+#define ID_CSS 0x53 /* Command Sets Supported (83) */
+#define ID_CSS_LBA48 0x0400
+
+/* Check for the presence of LBA48 only on drives that are 'big'. */
+#define LBA48_CHECK_SIZE 0x0f000000
+#define LBA_MAX_SIZE 0x0fffffff /* Highest sector size for
+ * regular LBA.
+ */
#if ENABLE_ATAPI
#define ERROR_SENSE 0xF0 /* sense key mask */
u8_t cyl_hi;
u8_t ldh;
u8_t command;
+
+ /* The following at for LBA48 */
+ u8_t count_prev;
+ u8_t sector_prev;
+ u8_t cyl_lo_prev;
+ u8_t cyl_hi_prev;
};
/* Error codes */
int timeout_ticks = DEF_TIMEOUT_TICKS, max_errors = MAX_ERRORS;
int wakeup_ticks = WAKEUP;
long w_standard_timeouts = 0, w_pci_debug = 0, w_instance = 0,
- w_lba48 = 0, atapi_debug = 0;
+ atapi_debug = 0;
int w_testing = 0, w_silent = 0;
*/
PRIVATE struct wini { /* main drive struct, one entry per drive */
unsigned state; /* drive state: deaf, initialized, dead */
- unsigned w_status; /* device status register */
+ unsigned short w_status; /* device status register */
unsigned base_cmd; /* command base register */
unsigned base_ctl; /* control base register */
unsigned irq; /* interrupt request line */
FORWARD _PROTOTYPE( int w_transfer, (int proc_nr, int opcode, off_t position,
iovec_t *iov, unsigned nr_req) );
FORWARD _PROTOTYPE( int com_out, (struct command *cmd) );
+FORWARD _PROTOTYPE( int com_out_ext, (struct command *cmd) );
FORWARD _PROTOTYPE( void w_need_reset, (void) );
FORWARD _PROTOTYPE( void ack_irqs, (unsigned int) );
FORWARD _PROTOTYPE( int w_do_close, (struct driver *dp, message *m_ptr) );
env_parse("ata_std_timeout", "d", 0, &w_standard_timeouts, 0, 1);
env_parse("ata_pci_debug", "d", 0, &w_pci_debug, 0, 1);
env_parse("ata_instance", "d", 0, &w_instance, 0, 8);
- env_parse("ata_lba48", "d", 0, &w_lba48, 0, 1);
env_parse("atapi_debug", "d", 0, &atapi_debug, 0, 1);
if (w_instance == 0) {
base_ctl = pci_attr_r32(devind, PCI_BAR_2) & 0xffffffe0;
if (base_cmd != REG_CMD_BASE0 && base_cmd != REG_CMD_BASE1) {
init_drive(&wini[w_next_drive],
- base_cmd, base_ctl, irq, 1, irq_hook, 0);
+ base_cmd, base_ctl+PCI_CTL_OFF,
+ irq, 1, irq_hook, 0);
init_drive(&wini[w_next_drive+1],
- base_cmd, base_ctl, irq, 1, irq_hook, 1);
+ base_cmd, base_ctl+PCI_CTL_OFF,
+ irq, 1, irq_hook, 1);
if (w_pci_debug)
printf("atapci %d: 0x%x 0x%x irq %d\n", devind, base_cmd, base_ctl, irq);
} else printf("atapci: ignored drives on primary channel, base %x\n", base_cmd);
struct wini *wn = w_wn;
struct command cmd;
int i, s;
+ u16_t w;
unsigned long size;
#define id_byte(n) (&tmp_buf[2 * (n)])
#define id_word(n) (((u16_t) id_byte(n)[0] << 0) \
wn->psectors = id_word(6);
size = (u32_t) wn->pcylinders * wn->pheads * wn->psectors;
- if ((id_byte(49)[1] & 0x02) && size > 512L*1024*2) {
+ w= id_word(ID_CAPABILITIES);
+ if ((w & ID_CAP_LBA) && size > 512L*1024*2) {
/* Drive is LBA capable and is big enough to trust it to
* not make a mess of it.
*/
wn->ldhpref |= LDH_LBA;
size = id_longword(60);
- if (w_lba48 && ((id_word(83)) & (1L << 10))) {
+ w= id_word(ID_CSS);
+ if (size < LBA48_CHECK_SIZE)
+ {
+ /* No need to check for LBA48 */
+ }
+ else if (w & ID_CSS_LBA48) {
/* Drive is LBA48 capable (and LBA48 is turned on). */
- if (id_word(102) || id_word(103)) {
+ if (id_longword(102)) {
/* If no. of sectors doesn't fit in 32 bits,
* trunacte to this. So it's LBA32 for now.
* This can still address devices up to 2TB
/* Actual number of sectors fits in 32 bits. */
size = id_longword(100);
}
-
wn->lba48 = 1;
}
}
/*===========================================================================*
* do_transfer *
*===========================================================================*/
-PRIVATE int do_transfer(struct wini *wn, unsigned int precomp, unsigned int count,
- unsigned int sector, unsigned int opcode)
+PRIVATE int do_transfer(struct wini *wn, unsigned int precomp,
+ unsigned int count, unsigned int sector, unsigned int opcode)
{
struct command cmd;
+ unsigned int sector_high;
unsigned secspcyl = wn->pheads * wn->psectors;
+ int do_lba48;
+
+ sector_high= 0; /* For future extensions */
+
+ do_lba48= 0;
+ if (sector >= LBA48_CHECK_SIZE || sector_high != 0)
+ {
+ if (wn->lba48)
+ do_lba48= 1;
+ else if (sector > LBA_MAX_SIZE || sector_high != 0)
+ {
+ /* Strange sector count for LBA device */
+ return EIO;
+ }
+ }
cmd.precomp = precomp;
cmd.count = count;
cmd.command = opcode == DEV_SCATTER ? CMD_WRITE : CMD_READ;
- /*
- if (w_lba48 && wn->lba48) {
- } else */
- if (wn->ldhpref & LDH_LBA) {
+
+ if (do_lba48) {
+ cmd.command = ((opcode == DEV_SCATTER) ?
+ CMD_WRITE_EXT : CMD_READ_EXT);
+ cmd.count_prev= (count >> 8);
+ cmd.sector = (sector >> 0) & 0xFF;
+ cmd.cyl_lo = (sector >> 8) & 0xFF;
+ cmd.cyl_hi = (sector >> 16) & 0xFF;
+ cmd.sector_prev= (sector >> 24) & 0xFF;
+ cmd.cyl_lo_prev= (sector_high) & 0xFF;
+ cmd.cyl_hi_prev= (sector_high >> 8) & 0xFF;
+ cmd.ldh = wn->ldhpref;
+
+ return com_out_ext(&cmd);
+ } else if (wn->ldhpref & LDH_LBA) {
cmd.sector = (sector >> 0) & 0xFF;
cmd.cyl_lo = (sector >> 8) & 0xFF;
cmd.cyl_hi = (sector >> 16) & 0xFF;
struct wini *wn = w_wn;
iovec_t *iop, *iov_end = iov + nr_req;
int r, s, errors;
- unsigned long block;
+ unsigned long block, w_status;
unsigned long dv_size = cv64ul(w_dv->dv_size);
unsigned cylinder, head, sector, nbytes;
if (!(wn->state & INITIALIZED) && w_specify() != OK) return(EIO);
/* Tell the controller to transfer nbytes bytes. */
- r = do_transfer(wn, wn->precomp, ((nbytes >> SECTOR_SHIFT) & BYTE),
+ r = do_transfer(wn, wn->precomp, (nbytes >> SECTOR_SHIFT),
block, opcode);
+ if (opcode == DEV_SCATTER) {
+ /* The specs call for a 400 ns wait after issuing the command.
+ * Reading the alternate status register is the suggested
+ * way to implement this wait.
+ */
+ if (sys_inb((wn->base_ctl+REG_CTL_ALTSTAT), &w_status) != OK)
+ panic(w_name(), "couldn't get status", NO_NUM);
+ }
+
while (r == OK && nbytes > 0) {
/* For each sector, wait for an interrupt and fetch the data
* (read), or supply data to the controller and wait for an
if ((r = at_intr_wait()) != OK) {
/* An error, send data to the bit bucket. */
if (w_wn->w_status & STATUS_DRQ) {
- if ((s=sys_insw(wn->base_cmd + REG_DATA, SELF, tmp_buf, SECTOR_SIZE)) != OK)
- panic(w_name(),"Call to sys_insw() failed", s);
+ if ((s=sys_insw(wn->base_cmd+REG_DATA,
+ SELF, tmp_buf,
+ SECTOR_SIZE)) != OK)
+ {
+ panic(w_name(),
+ "Call to sys_insw() failed",
+ s);
+ }
}
break;
}
}
+ /* Wait for busy to clear. */
+ if (!w_waitfor(STATUS_BSY, 0)) { r = ERR; break; }
+
/* Wait for data transfer requested. */
if (!w_waitfor(STATUS_DRQ, STATUS_DRQ)) { r = ERR; break; }
/* Copy bytes to or from the device's buffer. */
if (opcode == DEV_GATHER) {
- if ((s=sys_insw(wn->base_cmd + REG_DATA, proc_nr, (void *) iov->iov_addr, SECTOR_SIZE)) != OK)
- panic(w_name(),"Call to sys_insw() failed", s);
+ if ((s=sys_insw(wn->base_cmd + REG_DATA, proc_nr,
+ (void *) iov->iov_addr, SECTOR_SIZE)) != OK)
+ {
+ panic(w_name(),"Call to sys_insw() failed", s);
+ }
} else {
- if ((s=sys_outsw(wn->base_cmd + REG_DATA, proc_nr, (void *) iov->iov_addr, SECTOR_SIZE)) != OK)
- panic(w_name(),"Call to sys_insw() failed", s);
+ if ((s=sys_outsw(wn->base_cmd + REG_DATA, proc_nr,
+ (void *) iov->iov_addr, SECTOR_SIZE)) != OK)
+ {
+ panic(w_name(),"Call to sys_outsw() failed",
+ s);
+ }
/* Data sent, wait for an interrupt. */
if ((r = at_intr_wait()) != OK) break;
return(OK);
}
+/*===========================================================================*
+ * com_out_ext *
+ *===========================================================================*/
+PRIVATE int com_out_ext(cmd)
+struct command *cmd; /* Command block */
+{
+/* Output the command block to the winchester controller and return status */
+
+ struct wini *wn = w_wn;
+ unsigned base_cmd = wn->base_cmd;
+ unsigned base_ctl = wn->base_ctl;
+ pvb_pair_t outbyte[11]; /* vector for sys_voutb() */
+ int s; /* status for sys_(v)outb() */
+ unsigned long w_status;
+
+ if (w_wn->state & IGNORING) return ERR;
+
+ if (!w_waitfor(STATUS_BSY, 0)) {
+ printf("%s: controller not ready\n", w_name());
+ return(ERR);
+ }
+
+ /* Select drive. */
+ if ((s=sys_outb(base_cmd + REG_LDH, cmd->ldh)) != OK)
+ panic(w_name(),"Couldn't write register to select drive",s);
+
+ if (!w_waitfor(STATUS_BSY, 0)) {
+ printf("%s: com_out: drive not ready\n", w_name());
+ return(ERR);
+ }
+
+ /* Schedule a wakeup call, some controllers are flaky. This is done with
+ * a synchronous alarm. If a timeout occurs a SYN_ALARM message is sent
+ * from HARDWARE, so that w_intr_wait() can call w_timeout() in case the
+ * controller was not able to execute the command. Leftover timeouts are
+ * simply ignored by the main loop.
+ */
+ sys_setalarm(wakeup_ticks, 0);
+
+ wn->w_status = STATUS_ADMBSY;
+ w_command = cmd->command;
+ pv_set(outbyte[0], base_ctl + REG_CTL, 0);
+ pv_set(outbyte[1], base_cmd + REG_COUNT, cmd->count_prev);
+ pv_set(outbyte[2], base_cmd + REG_SECTOR, cmd->sector_prev);
+ pv_set(outbyte[3], base_cmd + REG_CYL_LO, cmd->cyl_lo_prev);
+ pv_set(outbyte[4], base_cmd + REG_CYL_HI, cmd->cyl_hi_prev);
+ pv_set(outbyte[5], base_cmd + REG_COUNT, cmd->count);
+ pv_set(outbyte[6], base_cmd + REG_SECTOR, cmd->sector);
+ pv_set(outbyte[7], base_cmd + REG_CYL_LO, cmd->cyl_lo);
+ pv_set(outbyte[8], base_cmd + REG_CYL_HI, cmd->cyl_hi);
+
+ pv_set(outbyte[10], base_cmd + REG_COMMAND, cmd->command);
+ if ((s=sys_voutb(outbyte, 11)) != OK)
+ panic(w_name(),"Couldn't write registers with sys_voutb()",s);
+
+ return(OK);
+}
+
/*===========================================================================*
* w_need_reset *
*===========================================================================*/
case CMD_IDLE:
break; /* fine */
case CMD_READ:
+ case CMD_READ_EXT:
case CMD_WRITE:
+ case CMD_WRITE_EXT:
/* Impossible, but not on PC's: The controller does not respond. */
/* Limiting multisector I/O seems to help. */
default:
/* Some other command. */
if (w_testing) wn->state |= IGNORING; /* Kick out this drive. */
- else if (!w_silent) printf("%s: timeout on command %02x\n", w_name(), w_command);
+ else if (!w_silent) printf("%s: timeout on command 0x%02x\n",
+ w_name(), w_command);
w_need_reset();
wn->w_status = 0;
}
{
/* Wait for a task completion interrupt. */
+ int r;
+ unsigned long w_status;
message m;
if (w_wn->irq != NO_IRQ) {
if (m.m_type == SYN_ALARM) { /* but check for timeout */
w_timeout(); /* a.o. set w_status */
} else if (m.m_type == HARD_INT) {
- sys_inb(w_wn->base_cmd + REG_STATUS, &w_wn->w_status);
+ r= sys_inb(w_wn->base_cmd + REG_STATUS, &w_status);
+ if (r != 0)
+ panic("at_wini", "sys_inb failed", r);
+ w_wn->w_status= w_status;
ack_irqs(m.NOTIFY_ARG);
} else if (m.m_type == DEV_PING) {
notify(m.m_source);
PRIVATE int at_intr_wait()
{
/* Wait for an interrupt, study the status bits and return error/success. */
- int r;
- int s,inbval; /* read value with sys_inb */
+ int r, s;
+ unsigned long inbval;
w_intr_wait();
if ((w_wn->w_status & (STATUS_BSY | STATUS_WF | STATUS_ERR)) == 0) {
* ticks. Disabling the alarm is not needed, because a static flag is used
* and a leftover timeout cannot do any harm.
*/
+ unsigned long w_status;
clock_t t0, t1;
int s;
+
getuptime(&t0);
do {
- if ((s=sys_inb(w_wn->base_cmd + REG_STATUS, &w_wn->w_status)) != OK)
+ if ((s=sys_inb(w_wn->base_cmd + REG_STATUS, &w_status)) != OK)
panic(w_name(),"Couldn't read register",s);
+ w_wn->w_status= w_status;
if ((w_wn->w_status & mask) == value) {
return 1;
}
PRIVATE void ack_irqs(unsigned int irqs)
{
unsigned int drive;
+ unsigned long w_status;
+
for (drive = 0; drive < MAX_DRIVES && irqs; drive++) {
if (!(wini[drive].state & IGNORING) && wini[drive].irq_need_ack &&
(wini[drive].irq_mask & irqs)) {
- if (sys_inb((wini[drive].base_cmd + REG_STATUS), &wini[drive].w_status) != OK)
- printf("couldn't ack irq on drive %d\n", drive);
+ if (sys_inb((wini[drive].base_cmd + REG_STATUS),
+ &w_status) != OK)
+ {
+ panic(w_name(), "couldn't ack irq on drive %d\n",
+ drive);
+ }
+ wini[drive].w_status= w_status;
if (sys_irqenable(&wini[drive].irq_hook_id) != OK)
printf("couldn't re-enable drive %d\n", drive);
irqs &= ~wini[drive].irq_mask;