/* Issue a command to the chip, and (busy!) wait for it to
* complete.
*
* Returns: < 0 on internal error, 0 on success, > 0 on error returned by the firmware
*
* Callable from any context, but locking is your problem. */
int hermes_docmd_wait(hermes_t *hw, u16 cmd, u16 parm0, hermes_response_t *resp)
{
int err;
int k;
u16 reg;
u16 status;
err = hermes_issue_cmd(hw, cmd, parm0);
if (err) {
if (! hermes_present(hw)) {
printk(KERN_WARNING "hermes @ %s0x%lx: "
"Card removed while issuing command.\n",
IO_TYPE(hw), hw->iobase);
err = -ENODEV;
} else
printk(KERN_ERR "hermes @ %s0x%lx: Error %d issuing command.\n",
IO_TYPE(hw), hw->iobase, err);
goto out;
}
reg = hermes_read_regn(hw, EVSTAT);
k = CMD_COMPL_TIMEOUT;
while ( (! (reg & HERMES_EV_CMD)) && k) {
k--;
udelay(10);
reg = hermes_read_regn(hw, EVSTAT);
}
if (! hermes_present(hw)) {
printk(KERN_WARNING "hermes @ %s0x%lx: "
"Card removed while waiting for command completion.\n",
IO_TYPE(hw), hw->iobase);
err = -ENODEV;
goto out;
}
if (! (reg & HERMES_EV_CMD)) {
printk(KERN_ERR "hermes @ %s0x%lx: "
"Timeout waiting for command completion.\n",
IO_TYPE(hw), hw->iobase);
err = -ETIMEDOUT;
goto out;
}
status = hermes_read_regn(hw, STATUS);
if (resp) {
resp->status = status;
resp->resp0 = hermes_read_regn(hw, RESP0);
resp->resp1 = hermes_read_regn(hw, RESP1);
resp->resp2 = hermes_read_regn(hw, RESP2);
}
hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
if (status & HERMES_STATUS_RESULT)
err = -EIO;
out:
return err;
}
static int hermes_doicmd_wait(struct hermes *hw, u16 cmd,
u16 parm0, u16 parm1, u16 parm2,
struct hermes_response *resp)
{
int err = 0;
int k;
u16 status, reg;
err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2);
if (err)
return err;
reg = hermes_read_regn(hw, EVSTAT);
k = CMD_INIT_TIMEOUT;
while ((!(reg & HERMES_EV_CMD)) && k) {
k--;
udelay(10);
reg = hermes_read_regn(hw, EVSTAT);
}
hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
if (!hermes_present(hw)) {
DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n",
hw->iobase);
err = -ENODEV;
goto out;
}
if (!(reg & HERMES_EV_CMD)) {
printk(KERN_ERR "hermes @ %p: "
"Timeout waiting for card to reset (reg=0x%04x)!\n",
hw->iobase, reg);
err = -ETIMEDOUT;
goto out;
}
status = hermes_read_regn(hw, STATUS);
if (resp) {
resp->status = status;
resp->resp0 = hermes_read_regn(hw, RESP0);
resp->resp1 = hermes_read_regn(hw, RESP1);
resp->resp2 = hermes_read_regn(hw, RESP2);
}
hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
if (status & HERMES_STATUS_RESULT)
err = -EIO;
out:
return err;
}
int hermes_init(hermes_t *hw)
{
u16 status, reg;
int err = 0;
int k;
/* We don't want to be interrupted while resetting the chipset */
hw->inten = 0x0;
hermes_write_regn(hw, INTEN, 0);
hermes_write_regn(hw, EVACK, 0xffff);
/* Normally it's a "can't happen" for the command register to
be busy when we go to issue a command because we are
serializing all commands. However we want to have some
chance of resetting the card even if it gets into a stupid
state, so we actually wait to see if the command register
will unbusy itself here. */
k = CMD_BUSY_TIMEOUT;
reg = hermes_read_regn(hw, CMD);
while (k && (reg & HERMES_CMD_BUSY)) {
if (reg == 0xffff) /* Special case - the card has probably been removed,
so don't wait for the timeout */
return -ENODEV;
k--;
udelay(1);
reg = hermes_read_regn(hw, CMD);
}
/* No need to explicitly handle the timeout - if we've timed
out hermes_issue_cmd() will probably return -EBUSY below */
/* According to the documentation, EVSTAT may contain
obsolete event occurrence information. We have to acknowledge
it by writing EVACK. */
reg = hermes_read_regn(hw, EVSTAT);
hermes_write_regn(hw, EVACK, reg);
/* We don't use hermes_docmd_wait here, because the reset wipes
the magic constant in SWSUPPORT0 away, and it gets confused */
err = hermes_issue_cmd(hw, HERMES_CMD_INIT, 0);
if (err)
return err;
reg = hermes_read_regn(hw, EVSTAT);
k = CMD_INIT_TIMEOUT;
while ( (! (reg & HERMES_EV_CMD)) && k) {
k--;
udelay(10);
reg = hermes_read_regn(hw, EVSTAT);
}
hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);
if (! hermes_present(hw)) {
DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n",
hw->iobase);
err = -ENODEV;
goto out;
}
if (! (reg & HERMES_EV_CMD)) {
printk(KERN_ERR "hermes @ %s0x%lx: "
"Timeout waiting for card to reset (reg=0x%04x)!\n",
IO_TYPE(hw), hw->iobase, reg);
err = -ETIMEDOUT;
goto out;
}
status = hermes_read_regn(hw, STATUS);
hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
if (status & HERMES_STATUS_RESULT)
err = -EIO;
out:
return err;
}
static int hermes_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0,
struct hermes_response *resp)
{
int err;
int k;
u16 reg;
u16 status;
err = hermes_issue_cmd(hw, cmd, parm0, 0, 0);
if (err) {
if (!hermes_present(hw)) {
if (net_ratelimit())
printk(KERN_WARNING "hermes @ %p: "
"Card removed while issuing command "
"0x%04x.\n", hw->iobase, cmd);
err = -ENODEV;
} else
if (net_ratelimit())
printk(KERN_ERR "hermes @ %p: "
"Error %d issuing command 0x%04x.\n",
hw->iobase, err, cmd);
goto out;
}
reg = hermes_read_regn(hw, EVSTAT);
k = CMD_COMPL_TIMEOUT;
while ((!(reg & HERMES_EV_CMD)) && k) {
k--;
udelay(10);
reg = hermes_read_regn(hw, EVSTAT);
}
if (!hermes_present(hw)) {
printk(KERN_WARNING "hermes @ %p: Card removed "
"while waiting for command 0x%04x completion.\n",
hw->iobase, cmd);
err = -ENODEV;
goto out;
}
if (!(reg & HERMES_EV_CMD)) {
printk(KERN_ERR "hermes @ %p: Timeout waiting for "
"command 0x%04x completion.\n", hw->iobase, cmd);
err = -ETIMEDOUT;
goto out;
}
status = hermes_read_regn(hw, STATUS);
if (resp) {
resp->status = status;
resp->resp0 = hermes_read_regn(hw, RESP0);
resp->resp1 = hermes_read_regn(hw, RESP1);
resp->resp2 = hermes_read_regn(hw, RESP2);
}
hermes_write_regn(hw, EVACK, HERMES_EV_CMD);
if (status & HERMES_STATUS_RESULT)
err = -EIO;
out:
return err;
}
/*****************************************************************************
* hermes_init *
* *
* Initialize the card *
*****************************************************************************/
int hermes_init (hermes_t * hw)
{
u32_t status, reg, resp0;
int err = 0;
int k;
/* We don't want to be interrupted while resetting the chipset. By
* setting the control mask for hardware interrupt generation to 0,
* we won't be disturbed*/
hw->inten = 0x0;
hermes_write_reg (hw, HERMES_INTEN, 0);
/* Acknowledge any pending events waiting for acknowledgement. We
* assume there won't be any important to take care off */
hermes_write_reg (hw, HERMES_EVACK, 0xffff);
/* Normally it's a "can't happen" for the command register to
* be busy when we go to issue a command because we are
* serializing all commands. However we want to have some
* chance of resetting the card even if it gets into a stupid
* state, so we actually wait to see if the command register
* will unbusy itself here. */
k = HERMES_CMD_BUSY_TIMEOUT;
reg = hermes_read_reg (hw, HERMES_CMD);
while (k && (reg & HERMES_CMD_BUSY)) {
if (reg == 0xffff) {
/* Special case - the card has probably
* been removed, so don't wait for the
* timeout */
printf("Hermes: Card removed?\n");
return -ENODEV;
}
k--;
micro_delay (1);
reg = hermes_read_reg (hw, HERMES_CMD);
}
/* No need to explicitly handle the timeout - if we've timed
* out hermes_issue_cmd() will probably return -EBUSY below.
* But i check to be sure :-) */
if (reg & HERMES_CMD_BUSY) {
printf("Hermes: Timeout waiting for the CMD_BUSY to unset\n");
return -EBUSY;
}
/* According to the documentation, EVSTAT may contain
* obsolete event occurrence information. We have to acknowledge
* it by writing EVACK. */
reg = hermes_read_reg (hw, HERMES_EVSTAT);
hermes_write_reg (hw, HERMES_EVACK, reg);
err = hermes_issue_cmd (hw, HERMES_CMD_INIT, 0);
if (err){
printf("Hermes: errornr: 0x%x issueing HERMES_CMD_INIT\n",
err);
return err;
}
/* here we start waiting for the above command,CMD_INIT, to complete.
* Completion is noticeable when the HERMES_EV_CMD bit in the
* HERMES_EVSTAT register is set to 1 */
reg = hermes_read_reg (hw, HERMES_EVSTAT);
k = HERMES_CMD_INIT_TIMEOUT;
while ((!(reg & HERMES_EV_CMD)) && k) {
k--;
micro_delay (10);
reg = hermes_read_reg (hw, HERMES_EVSTAT);
}
/* the software support register 0 (there are 3) is filled with a
* magic number. With this one can test the availability of the card */
hermes_write_reg (hw, HERMES_SWSUPPORT0, HERMES_MAGIC);
if (!hermes_present (hw)) {
printf("Hermes: Card not present?: got mag. nr.0x%x\n",
hermes_read_reg (hw, HERMES_SWSUPPORT0));
}
if (!(reg & HERMES_EV_CMD)) {
printf("hermes @ %x: Timeout waiting for card to reset\n",
hw->iobase);
return -ETIMEDOUT;
}
status = hermes_read_reg (hw, HERMES_STATUS);
resp0 = hermes_read_reg (hw, HERMES_RESP0);
/* after having issued the command above, the completion set a bit in
* the EVSTAT register. This has to be acknowledged, as follows */
hermes_write_reg (hw, HERMES_EVACK, HERMES_EV_CMD);
/* Was the status, the result of the issued command, ok? */
/* The expression below should be zero. Non-zero means an error */
if (status & HERMES_STATUS_RESULT) {
printf("Hermes:Result of INIT_CMD wrong.error value: 0x%x\n",
(status & HERMES_STATUS_RESULT) >> 8);
err = -EIO;
}