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/*
* ---------------------------------------------------------------------------
* FILE: init_hw.c
*
* PURPOSE:
* Use the HIP core lib to initialise the UniFi chip.
* It is part of the porting exercise in Linux.
*
* Copyright (C) 2009 by Cambridge Silicon Radio Ltd.
*
* Refer to LICENSE.txt included with this source code for details on
* the license terms.
*
* ---------------------------------------------------------------------------
*/
#include "csr_wifi_hip_unifi.h"
#include "unifi_priv.h"
#define MAX_INIT_ATTEMPTS 4
extern int led_mask;
/*
* ---------------------------------------------------------------------------
* uf_init_hw
*
* Resets hardware, downloads and initialises f/w.
* This function demonstrates how to use the HIP core lib API
* to implement the SME unifi_sys_wifi_on_req() part of the SYS API.
*
* In a simple implementation, all this function needs to do is call
* unifi_init_card() and then unifi_card_info().
* In the Linux implementation, it will retry to initialise UniFi or
* try to debug the reasons if unifi_init_card() returns an error.
*
* Arguments:
* ospriv Pointer to OS driver structure for the device.
*
* Returns:
* O on success, non-zero otherwise.
*
* ---------------------------------------------------------------------------
*/
int
uf_init_hw(unifi_priv_t *priv)
{
int attempts = 0;
int priv_instance;
CsrResult csrResult = CSR_RESULT_FAILURE;
priv_instance = uf_find_priv(priv);
if (priv_instance == -1) {
unifi_warning(priv, "uf_init_hw: Unknown priv instance, will use fw_init[0]\n");
priv_instance = 0;
}
while (1) {
if (attempts > MAX_INIT_ATTEMPTS) {
unifi_error(priv, "Failed to initialise UniFi after %d attempts, "
"giving up.\n",
attempts);
break;
}
attempts++;
unifi_info(priv, "Initialising UniFi, attempt %d\n", attempts);
if (fw_init[priv_instance] > 0) {
unifi_notice(priv, "f/w init prevented by module parameter\n");
break;
} else if (fw_init[priv_instance] == 0) {
fw_init[priv_instance] ++;
}
/*
* Initialise driver core. This will perform a reset of UniFi
* internals, but not the SDIO CCCR.
*/
CsrSdioClaim(priv->sdio);
csrResult = unifi_init_card(priv->card, led_mask);
CsrSdioRelease(priv->sdio);
if (csrResult == CSR_WIFI_HIP_RESULT_NO_DEVICE) {
return CsrHipResultToStatus(csrResult);
}
if (csrResult == CSR_WIFI_HIP_RESULT_NOT_FOUND) {
unifi_error(priv, "Firmware file required, but not found.\n");
return CsrHipResultToStatus(csrResult);
}
if (csrResult != CSR_RESULT_SUCCESS) {
/* failed. Reset h/w and try again */
unifi_error(priv, "Failed to initialise UniFi chip.\n");
continue;
}
/* Get the version information from the lib_hip */
unifi_card_info(priv->card, &priv->card_info);
return CsrHipResultToStatus(csrResult);
}
return CsrHipResultToStatus(csrResult);
} /* uf_init_hw */
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