From 3b86cd428cc1338667585d6b6bffdabc6a601c5e Mon Sep 17 00:00:00 2001 From: Jes Sorensen Date: Fri, 26 Aug 2016 16:09:00 -0400 Subject: [PATCH] rtl8xxxu: Implement rtl8188eu_power_off() This makes the driver match the poweroff sequence of the vendor driver and allows the firmware to reload correctly upon rmmod/insmod. However the device still doesn't receive data upon reloading. Signed-off-by: Jes Sorensen --- .../net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c | 136 ++++++++++++++++++++- .../net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h | 2 + 2 files changed, 137 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c @@ -1191,6 +1191,71 @@ exit: return ret; } +static int rtl8188eu_emu_to_disabled(struct rtl8xxxu_priv *priv) +{ + u8 val8; + + /* 0x04[12:11] = 01 enable WL suspend */ + val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 2); + val8 &= ~BIT(0); + rtl8xxxu_write8(priv, REG_APS_FSMCO + 2, val8); + + val8 = rtl8xxxu_read8(priv, REG_APS_FSMCO + 1); + val8 |= BIT(7); + rtl8xxxu_write8(priv, REG_APS_FSMCO + 1, val8); + + return 0; +} + +static int rtl8188eu_active_to_lps(struct rtl8xxxu_priv *priv) +{ + struct device *dev = &priv->udev->dev; + u8 val8; + u16 val16; + u32 val32; + int retry, retval; + + rtl8xxxu_write8(priv, REG_TXPAUSE, 0x7f); + + retry = 100; + retval = -EBUSY; + /* + * Poll 32 bit wide 0x05f8 for 0x00000000 to ensure no TX is pending. + */ + do { + val32 = rtl8xxxu_read32(priv, 0x05f8); + if (!val32) { + retval = 0; + break; + } + } while (retry--); + + if (!retry) { + dev_warn(dev, "Failed to flush TX queue\n"); + retval = -EBUSY; + goto out; + } + + /* Disable CCK and OFDM, clock gated */ + val8 = rtl8xxxu_read8(priv, REG_SYS_FUNC); + val8 &= ~SYS_FUNC_BBRSTB; + rtl8xxxu_write8(priv, REG_SYS_FUNC, val8); + + udelay(2); + + /* Reset MAC TRX */ + val16 = rtl8xxxu_read16(priv, REG_CR); + val16 &= ~(CR_MAC_TX_ENABLE | CR_MAC_RX_ENABLE | CR_SECURITY_ENABLE); + rtl8xxxu_write16(priv, REG_CR, val16); + + val8 = rtl8xxxu_read8(priv, REG_DUAL_TSF_RST); + val8 |= DUAL_TSF_TX_OK; + rtl8xxxu_write8(priv, REG_DUAL_TSF_RST, val8); + +out: + return retval; +} + static int rtl8188eu_power_on(struct rtl8xxxu_priv *priv) { u16 val16; @@ -1221,6 +1286,75 @@ exit: return ret; } +void rtl8188eu_power_off(struct rtl8xxxu_priv *priv) +{ + u8 val8; + u16 val16; + + rtl8xxxu_flush_fifo(priv); + + val8 = rtl8xxxu_read8(priv, REG_TX_REPORT_CTRL); + val8 &= ~TX_REPORT_CTRL_TIMER_ENABLE; + rtl8xxxu_write8(priv, REG_TX_REPORT_CTRL, val8); + + /* Turn off RF */ + rtl8xxxu_write8(priv, REG_RF_CTRL, 0x00); + + rtl8188eu_active_to_lps(priv); + + /* Reset Firmware if running in RAM */ + if (rtl8xxxu_read8(priv, REG_MCU_FW_DL) & MCU_FW_RAM_SEL) + rtl8xxxu_firmware_self_reset(priv); + + /* Reset MCU */ + val16 = rtl8xxxu_read16(priv, REG_SYS_FUNC); + val16 &= ~SYS_FUNC_CPU_ENABLE; + rtl8xxxu_write16(priv, REG_SYS_FUNC, val16); + + /* Reset MCU ready status */ + rtl8xxxu_write8(priv, REG_MCU_FW_DL, 0x00); + + /* 32K_CTRL looks to be very 8188e specific */ + val8 = rtl8xxxu_read8(priv, REG_32K_CTRL); + val8 &= ~BIT(0); + rtl8xxxu_write8(priv, REG_32K_CTRL, val8); + + rtl8188eu_active_to_emu(priv); + rtl8188eu_emu_to_disabled(priv); + + /* Reset MCU IO Wrapper */ + val8 = rtl8xxxu_read8(priv, REG_RSV_CTRL + 1); + val8 &= ~BIT(3); + rtl8xxxu_write8(priv, REG_RSV_CTRL + 1, val8); + + val8 = rtl8xxxu_read8(priv, REG_RSV_CTRL + 1); + val8 |= BIT(3); + rtl8xxxu_write8(priv, REG_RSV_CTRL + 1, val8); + + /* Vendor driver refers to GPIO_IN */ + val8 = rtl8xxxu_read8(priv, REG_GPIO_PIN_CTRL); + /* Vendor driver refers to GPIO_OUT */ + rtl8xxxu_write8(priv, REG_GPIO_PIN_CTRL + 1, val8); + rtl8xxxu_write8(priv, REG_GPIO_PIN_CTRL + 2, 0xff); + + val8 = rtl8xxxu_read8(priv, REG_GPIO_IO_SEL); + rtl8xxxu_write8(priv, REG_GPIO_IO_SEL + 1, val8 << 4); + val8 = rtl8xxxu_read8(priv, REG_GPIO_IO_SEL + 1); + rtl8xxxu_write8(priv, REG_GPIO_IO_SEL + 1, val8 | 0x0f); + + /* + * Set LNA, TRSW, EX_PA Pin to output mode + * Referred to as REG_BB_PAD_CTRL in 8188eu vendor driver + */ + rtl8xxxu_write32(priv, REG_PAD_CTRL1, 0x00080808); + + rtl8xxxu_write8(priv, REG_RSV_CTRL, 0x00); + + val16 = rtl8xxxu_read16(priv, REG_APS_FSMCO); + val16 |= APS_FSMCO_ENABLE_POWERDOWN | APS_FSMCO_HW_POWERDOWN; + rtl8xxxu_write16(priv, REG_APS_FSMCO, val16); +} + static void rtl8188e_enable_rf(struct rtl8xxxu_priv *priv) { rtl8xxxu_write8(priv, REG_TXPAUSE, 0x00); @@ -1265,7 +1399,7 @@ struct rtl8xxxu_fileops rtl8188eu_fops = .parse_efuse = rtl8188eu_parse_efuse, .load_firmware = rtl8188eu_load_firmware, .power_on = rtl8188eu_power_on, - .power_off = rtl8xxxu_power_off, + .power_off = rtl8188eu_power_off, .reset_8051 = rtl8188eu_reset_8051, .llt_init = rtl8xxxu_init_llt_table, .init_phy_bb = rtl8188eu_init_phy_bb, --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_regs.h @@ -418,6 +418,8 @@ #define REG_MBIST_START 0x0174 #define REG_MBIST_DONE 0x0178 #define REG_MBIST_FAIL 0x017c +/* 8188EU */ +#define REG_32K_CTRL 0x0194 #define REG_C2HEVT_MSG_NORMAL 0x01a0 /* 8192EU/8723BU/8812 */ #define REG_C2HEVT_CMD_ID_8723B 0x01ae