From 0d1b57c1f04cad448eec54dc8de6da3777d3a28d Mon Sep 17 00:00:00 2001 From: Adham Abozaeid <adham.abozaeid@microchip.com> Date: Fri, 9 Aug 2019 18:25:18 +0000 Subject: [PATCH] staging: wilc1000: Don't reset WILC CPU disgracefully Send abort request to WILC from wilc_wlan_stop instead of resetting the CPU. The abort request was being sent from wilc_wlan_cleanup after the CPU was reset which wasn't the correct order. The abort request handler in the chip will take care of resetting the CPU. Signed-off-by: Adham Abozaeid <adham.abozaeid@microchip.com> Link: https://lore.kernel.org/r/20190809182510.22443-2-adham.abozaeid@microchip.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/staging/wilc1000/wilc_netdev.c | 4 +- drivers/staging/wilc1000/wilc_wlan.c | 75 +++++++------------------- drivers/staging/wilc1000/wilc_wlan.h | 5 +- 3 files changed, 24 insertions(+), 60 deletions(-) diff --git a/drivers/staging/wilc1000/wilc_netdev.c b/drivers/staging/wilc1000/wilc_netdev.c index 57510400f243..cd11c35adcfe 100644 --- a/drivers/staging/wilc1000/wilc_netdev.c +++ b/drivers/staging/wilc1000/wilc_netdev.c @@ -475,7 +475,7 @@ static void wilc_wlan_deinitialize(struct net_device *dev) wlan_deinitialize_threads(dev); deinit_irq(dev); - wilc_wlan_stop(wl); + wilc_wlan_stop(wl, vif); wilc_wlan_cleanup(dev); wlan_deinit_locks(dev); @@ -573,7 +573,7 @@ static int wilc_wlan_initialize(struct net_device *dev, struct wilc_vif *vif) return 0; fail_fw_start: - wilc_wlan_stop(wl); + wilc_wlan_stop(wl, vif); fail_irq_enable: if (!wl->dev_irq_num && diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c index d4ca6467485c..3d902b499a34 100644 --- a/drivers/staging/wilc1000/wilc_wlan.c +++ b/drivers/staging/wilc1000/wilc_wlan.c @@ -968,60 +968,42 @@ int wilc_wlan_start(struct wilc *wilc) return (ret < 0) ? ret : 0; } -int wilc_wlan_stop(struct wilc *wilc) +int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif) { u32 reg = 0; int ret; - u8 timeout = 10; acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); - ret = wilc->hif_func->hif_read_reg(wilc, WILC_GLB_RESET_0, ®); + ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®); if (!ret) { + netdev_err(vif->ndev, "Error while reading reg\n"); release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); return ret; } - reg &= ~BIT(10); - ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg); + ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0, + (reg | WILC_ABORT_REQ_BIT)); if (!ret) { + netdev_err(vif->ndev, "Error while writing reg\n"); release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); return ret; } - do { - ret = wilc->hif_func->hif_read_reg(wilc, - WILC_GLB_RESET_0, ®); - if (!ret) { - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); - return ret; - } - - if ((reg & BIT(10))) { - reg &= ~BIT(10); - ret = wilc->hif_func->hif_write_reg(wilc, - WILC_GLB_RESET_0, - reg); - timeout--; - } else { - ret = wilc->hif_func->hif_read_reg(wilc, - WILC_GLB_RESET_0, - ®); - if (!ret) { - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); - return ret; - } - break; - } - - } while (timeout); - reg = (BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(8) | BIT(9) | BIT(26) | - BIT(29) | BIT(30) | BIT(31)); - - wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg); - reg = (u32)~BIT(10); + ret = wilc->hif_func->hif_read_reg(wilc, WILC_FW_HOST_COMM, ®); + if (!ret) { + netdev_err(vif->ndev, "Error while reading reg\n"); + release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + return ret; + } + reg = BIT(0); - ret = wilc->hif_func->hif_write_reg(wilc, WILC_GLB_RESET_0, reg); + ret = wilc->hif_func->hif_write_reg(wilc, WILC_FW_HOST_COMM, reg); + if (!ret) { + netdev_err(vif->ndev, "Error while writing reg\n"); + release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); + return ret; + } release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); @@ -1032,8 +1014,6 @@ void wilc_wlan_cleanup(struct net_device *dev) { struct txq_entry_t *tqe; struct rxq_entry_t *rqe; - u32 reg = 0; - int ret; struct wilc_vif *vif = netdev_priv(dev); struct wilc *wilc = vif->wilc; @@ -1058,23 +1038,6 @@ void wilc_wlan_cleanup(struct net_device *dev) wilc->rx_buffer = NULL; kfree(wilc->tx_buffer); wilc->tx_buffer = NULL; - - acquire_bus(wilc, WILC_BUS_ACQUIRE_AND_WAKEUP); - - ret = wilc->hif_func->hif_read_reg(wilc, WILC_GP_REG_0, ®); - if (!ret) { - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); - return; - } - - ret = wilc->hif_func->hif_write_reg(wilc, WILC_GP_REG_0, - (reg | ABORT_INT)); - if (!ret) { - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); - return; - } - - release_bus(wilc, WILC_BUS_RELEASE_ALLOW_SLEEP); wilc->hif_func->hif_deinit(NULL); } diff --git a/drivers/staging/wilc1000/wilc_wlan.h b/drivers/staging/wilc1000/wilc_wlan.h index 802f11807659..f566d040bb72 100644 --- a/drivers/staging/wilc1000/wilc_wlan.h +++ b/drivers/staging/wilc1000/wilc_wlan.h @@ -98,6 +98,7 @@ #define WILC_VMM_TBL_RX_SHADOW_BASE WILC_AHB_SHARE_MEM_BASE #define WILC_VMM_TBL_RX_SHADOW_SIZE 256 +#define WILC_FW_HOST_COMM 0x13c0 #define WILC_GP_REG_0 0x149c #define WILC_GP_REG_1 0x14a0 @@ -129,7 +130,7 @@ #define WILC_PLL_TO_SDIO 4 #define WILC_PLL_TO_SPI 2 -#define ABORT_INT BIT(31) +#define WILC_ABORT_REQ_BIT BIT(31) #define WILC_RX_BUFF_SIZE (96 * 1024) #define WILC_TX_BUFF_SIZE (64 * 1024) @@ -280,7 +281,7 @@ struct wilc_vif; int wilc_wlan_firmware_download(struct wilc *wilc, const u8 *buffer, u32 buffer_size); int wilc_wlan_start(struct wilc *wilc); -int wilc_wlan_stop(struct wilc *wilc); +int wilc_wlan_stop(struct wilc *wilc, struct wilc_vif *vif); int wilc_wlan_txq_add_net_pkt(struct net_device *dev, void *priv, u8 *buffer, u32 buffer_size, void (*tx_complete_fn)(void *, int)); -- 2.30.9