brcmfmac: setup SDIO reset behavior

Set device in a manner that SDIO I/O card reset
will lead to WLAN backplane and PMU state reset.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Signed-off-by: Piotr Haber <phaber@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

3 files changed, 36 insertions, 7 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index d24eb66d324d..c06bb083c459 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -3635,7 +3635,6 @@ brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
         int err = 0;
         int reg_addr;
         u32 reg_val;
-        u8 idx;
 
         bus->alp_only = true;
 
@@ -3686,12 +3685,37 @@ brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
                 goto fail;
         }
 
-        /* Set core control so an SDIO reset does a backplane reset */
-        idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
-        reg_addr = bus->ci->c_inf[idx].base +
-                   offsetof(struct sdpcmd_regs, corecontrol);
-        reg_val = brcmf_sdio_regrl(bus->sdiodev, reg_addr, NULL);
-        brcmf_sdio_regwl(bus->sdiodev, reg_addr, reg_val | CC_BPRESEN, NULL);
+        /* Set card control so an SDIO card reset does a WLAN backplane reset */
+        reg_val = brcmf_sdio_regrb(bus->sdiodev,
+                                   SDIO_CCCR_BRCM_CARDCTRL, &err);
+        if (err)
+                goto fail;
+
+        reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
+
+        brcmf_sdio_regwb(bus->sdiodev,
+                         SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
+        if (err)
+                goto fail;
+
+        /* set PMUControl so a backplane reset does PMU state reload */
+        reg_addr = CORE_CC_REG(bus->ci->c_inf[0].base,
+                               pmucontrol);
+        reg_val = brcmf_sdio_regrl(bus->sdiodev,
+                                   reg_addr,
+                                   &err);
+        if (err)
+                goto fail;
+
+        reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
+
+        brcmf_sdio_regwl(bus->sdiodev,
+                         reg_addr,
+                         reg_val,
+                         &err);
+        if (err)
+                goto fail;
+
 
         sdio_release_host(bus->sdiodev->func[1]);
 
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h b/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h
index b9b397b59965..28ed3cc9f35a 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h
+++ b/drivers/net/wireless/brcm80211/brcmfmac/sdio_host.h
@@ -52,6 +52,8 @@
 #define SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT    0x02
 #define SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT        0x04
 #define SDIO_CCCR_BRCM_CARDCAP_CMD_NODEC        0x08
+#define SDIO_CCCR_BRCM_CARDCTRL         0xf1
+#define SDIO_CCCR_BRCM_CARDCTRL_WLANRESET       0x02
 #define SDIO_CCCR_BRCM_SEPINT                   0xf2
 
 #define  SDIO_SEPINT_MASK               0x01
diff --git a/include/linux/bcma/bcma_driver_chipcommon.h b/include/linux/bcma/bcma_driver_chipcommon.h
index 453fcc914683..b8b09eac60a4 100644
--- a/include/linux/bcma/bcma_driver_chipcommon.h
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
@@ -316,6 +316,9 @@
 #define BCMA_CC_PMU_CTL                 0x0600 /* PMU control */
 #define  BCMA_CC_PMU_CTL_ILP_DIV        0xFFFF0000 /* ILP div mask */
 #define  BCMA_CC_PMU_CTL_ILP_DIV_SHIFT  16
+#define  BCMA_CC_PMU_CTL_RES            0x00006000 /* reset control mask */
+#define  BCMA_CC_PMU_CTL_RES_SHIFT      13
+#define  BCMA_CC_PMU_CTL_RES_RELOAD     0x2     /* reload POR values */
 #define  BCMA_CC_PMU_CTL_PLL_UPD        0x00000400
 #define  BCMA_CC_PMU_CTL_NOILPONW       0x00000200 /* No ILP on wait */
 #define  BCMA_CC_PMU_CTL_HTREQEN        0x00000100 /* HT req enable */