wil6210: support flashless device

Talyn device supports boot without flash.
Driver detects flashless device and in this case waits for ready indication
from HW machine (instead of bootloader ready indication). Also in this
case, MAC address is retrieved from OTP.

Signed-off-by: Dedy Lansky <dlansky@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

3 files changed, 87 insertions, 29 deletions

diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c
index aa6f9c4a21f1..f6cca0ffbca4 100644
--- a/drivers/net/wireless/ath/wil6210/main.c
+++ b/drivers/net/wireless/ath/wil6210/main.c
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2012-2017 Qualcomm Atheros, Inc.
+ * Copyright (c) 2018, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -670,7 +671,7 @@ static void wil_set_oob_mode(struct wil6210_priv *wil, u8 mode)
         }
 }
 
-static int wil_target_reset(struct wil6210_priv *wil)
+static int wil_target_reset(struct wil6210_priv *wil, int no_flash)
 {
         int delay = 0;
         u32 x, x1 = 0;
@@ -684,9 +685,11 @@ static int wil_target_reset(struct wil6210_priv *wil)
 
         wil_halt_cpu(wil);
 
-        /* clear all boot loader "ready" bits */
-        wil_w(wil, RGF_USER_BL +
-              offsetof(struct bl_dedicated_registers_v0, boot_loader_ready), 0);
+        if (!no_flash)
+                /* clear all boot loader "ready" bits */
+                wil_w(wil, RGF_USER_BL +
+                      offsetof(struct bl_dedicated_registers_v0,
+                               boot_loader_ready), 0);
         /* Clear Fw Download notification */
         wil_c(wil, RGF_USER_USAGE_6, BIT(0));
 
@@ -727,21 +730,33 @@ static int wil_target_reset(struct wil6210_priv *wil)
         wil_w(wil, RGF_USER_CLKS_CTL_SW_RST_VEC_0, 0);
 
         /* wait until device ready. typical time is 20..80 msec */
-        do {
-                msleep(RST_DELAY);
-                x = wil_r(wil, RGF_USER_BL +
-                          offsetof(struct bl_dedicated_registers_v0,
-                                   boot_loader_ready));
-                if (x1 != x) {
-                        wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n", x1, x);
-                        x1 = x;
-                }
-                if (delay++ > RST_COUNT) {
-                        wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
-                                x);
-                        return -ETIME;
-                }
-        } while (x != BL_READY);
+        if (no_flash)
+                do {
+                        msleep(RST_DELAY);
+                        x = wil_r(wil, USER_EXT_USER_PMU_3);
+                        if (delay++ > RST_COUNT) {
+                                wil_err(wil, "Reset not completed, PMU_3 0x%08x\n",
+                                        x);
+                                return -ETIME;
+                        }
+                } while ((x & BIT_PMU_DEVICE_RDY) == 0);
+        else
+                do {
+                        msleep(RST_DELAY);
+                        x = wil_r(wil, RGF_USER_BL +
+                                  offsetof(struct bl_dedicated_registers_v0,
+                                           boot_loader_ready));
+                        if (x1 != x) {
+                                wil_dbg_misc(wil, "BL.ready 0x%08x => 0x%08x\n",
+                                             x1, x);
+                                x1 = x;
+                        }
+                        if (delay++ > RST_COUNT) {
+                                wil_err(wil, "Reset not completed, bl.ready 0x%08x\n",
+                                        x);
+                                return -ETIME;
+                        }
+                } while (x != BL_READY);
 
         wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
 
@@ -906,6 +921,27 @@ static void wil_bl_crash_info(struct wil6210_priv *wil, bool is_err)
         }
 }
 
+static int wil_get_otp_info(struct wil6210_priv *wil)
+{
+        struct net_device *ndev = wil_to_ndev(wil);
+        struct wiphy *wiphy = wil_to_wiphy(wil);
+        u8 mac[8];
+
+        wil_memcpy_fromio_32(mac, wil->csr + HOSTADDR(RGF_OTP_MAC),
+                             sizeof(mac));
+        if (!is_valid_ether_addr(mac)) {
+                wil_err(wil, "Invalid MAC %pM\n", mac);
+                return -EINVAL;
+        }
+
+        ether_addr_copy(ndev->perm_addr, mac);
+        ether_addr_copy(wiphy->perm_addr, mac);
+        if (!is_valid_ether_addr(ndev->dev_addr))
+                ether_addr_copy(ndev->dev_addr, mac);
+
+        return 0;
+}
+
 static int wil_wait_for_fw_ready(struct wil6210_priv *wil)
 {
         ulong to = msecs_to_jiffies(1000);
@@ -999,6 +1035,7 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
 {
         int rc;
         unsigned long status_flags = BIT(wil_status_resetting);
+        int no_flash;
 
         wil_dbg_misc(wil, "reset\n");
 
@@ -1074,20 +1111,28 @@ int wil_reset(struct wil6210_priv *wil, bool load_fw)
         flush_workqueue(wil->wq_service);
         flush_workqueue(wil->wmi_wq);
 
-        wil_bl_crash_info(wil, false);
+        no_flash = test_bit(hw_capa_no_flash, wil->hw_capa);
+        if (!no_flash)
+                wil_bl_crash_info(wil, false);
         wil_disable_irq(wil);
-        rc = wil_target_reset(wil);
+        rc = wil_target_reset(wil, no_flash);
         wil6210_clear_irq(wil);
         wil_enable_irq(wil);
         wil_rx_fini(wil);
         if (rc) {
-                wil_bl_crash_info(wil, true);
+                if (!no_flash)
+                        wil_bl_crash_info(wil, true);
                 goto out;
         }
 
-        rc = wil_get_bl_info(wil);
-        if (rc == -EAGAIN && !load_fw) /* ignore RF error if not going up */
-                rc = 0;
+        if (no_flash) {
+                rc = wil_get_otp_info(wil);
+        } else {
+                rc = wil_get_bl_info(wil);
+                if (rc == -EAGAIN && !load_fw)
+                        /* ignore RF error if not going up */
+                        rc = 0;
+        }
         if (rc)
                 goto out;
 
diff --git a/drivers/net/wireless/ath/wil6210/pcie_bus.c b/drivers/net/wireless/ath/wil6210/pcie_bus.c
index 6b153fece5b8..ab8cb91b7984 100644
--- a/drivers/net/wireless/ath/wil6210/pcie_bus.c
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -44,7 +44,7 @@ int wil_set_capabilities(struct wil6210_priv *wil)
                             RGF_USER_REVISION_ID_MASK);
         int platform_capa;
 
-        bitmap_zero(wil->hw_capabilities, hw_capability_last);
+        bitmap_zero(wil->hw_capa, hw_capa_last);
         bitmap_zero(wil->fw_capabilities, WMI_FW_CAPABILITY_MAX);
         bitmap_zero(wil->platform_capa, WIL_PLATFORM_CAPA_MAX);
         wil->wil_fw_name = ftm_mode ? WIL_FW_NAME_FTM_DEFAULT :
@@ -83,6 +83,9 @@ int wil_set_capabilities(struct wil6210_priv *wil)
                 memcpy(fw_mapping, talyn_fw_mapping, sizeof(talyn_fw_mapping));
                 wil->rgf_fw_assert_code_addr = TALYN_RGF_FW_ASSERT_CODE;
                 wil->rgf_ucode_assert_code_addr = TALYN_RGF_UCODE_ASSERT_CODE;
+                if (wil_r(wil, RGF_USER_OTP_HW_RD_MACHINE_1) &
+                    BIT_NO_FLASH_INDICATION)
+                        set_bit(hw_capa_no_flash, wil->hw_capa);
                 break;
         default:
                 wil_err(wil, "Unknown board hardware, chip_id 0x%08x, chip_revision 0x%08x\n",
@@ -92,7 +95,8 @@ int wil_set_capabilities(struct wil6210_priv *wil)
                 return -EINVAL;
         }
 
-        wil_info(wil, "Board hardware is %s\n", wil->hw_name);
+        wil_info(wil, "Board hardware is %s, flash %sexist\n", wil->hw_name,
+                 test_bit(hw_capa_no_flash, wil->hw_capa) ? "doesn't " : "");
 
         /* Get platform capabilities */
         if (wil->platform_ops.get_capa) {
diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h
index 79356bbd367e..2273a0550a82 100644
--- a/drivers/net/wireless/ath/wil6210/wil6210.h
+++ b/drivers/net/wireless/ath/wil6210/wil6210.h
@@ -195,6 +195,8 @@ struct RGF_ICR {
 #define RGF_USER_CLKS_CTL_EXT_SW_RST_VEC_1      (0x880c2c)
 #define RGF_USER_SPARROW_M_4                    (0x880c50) /* Sparrow */
         #define BIT_SPARROW_M_4_SEL_SLEEP_OR_REF        BIT(2)
+#define RGF_USER_OTP_HW_RD_MACHINE_1    (0x880ce0)
+        #define BIT_NO_FLASH_INDICATION         BIT(8)
 
 #define RGF_DMA_EP_TX_ICR               (0x881bb4) /* struct RGF_ICR */
         #define BIT_DMA_EP_TX_ICR_TX_DONE       BIT(0)
@@ -285,6 +287,9 @@ struct RGF_ICR {
 #define RGF_CAF_PLL_LOCK_STATUS         (0x88afec)
         #define BIT_CAF_OSC_DIG_XTAL_STABLE     BIT(0)
 
+#define USER_EXT_USER_PMU_3             (0x88d00c)
+        #define BIT_PMU_DEVICE_RDY              BIT(0)
+
 #define RGF_USER_JTAG_DEV_ID    (0x880b34) /* device ID */
         #define JTAG_DEV_ID_SPARROW     (0x2632072f)
         #define JTAG_DEV_ID_TALYN       (0x7e0e1)
@@ -294,6 +299,8 @@ struct RGF_ICR {
         #define REVISION_ID_SPARROW_B0  (0x0)
         #define REVISION_ID_SPARROW_D0  (0x3)
 
+#define RGF_OTP_MAC                     (0x8a0620)
+
 /* crash codes for FW/Ucode stored here */
 
 /* ASSERT RGFs */
@@ -583,7 +590,8 @@ enum {
 };
 
 enum {
-        hw_capability_last
+        hw_capa_no_flash,
+        hw_capa_last
 };
 
 struct wil_probe_client_req {
@@ -659,7 +667,8 @@ struct wil6210_priv {
         u8 chip_revision;
         const char *hw_name;
         const char *wil_fw_name;
-        DECLARE_BITMAP(hw_capabilities, hw_capability_last);
+        char *board_file;
+        DECLARE_BITMAP(hw_capa, hw_capa_last);
         DECLARE_BITMAP(fw_capabilities, WMI_FW_CAPABILITY_MAX);
         DECLARE_BITMAP(platform_capa, WIL_PLATFORM_CAPA_MAX);
         u8 n_mids; /* number of additional MIDs as reported by FW */