diff options
Diffstat (limited to 'drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c')
| -rw-r--r-- | drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c new file mode 100644 index 000000000000..af690e1a6e7b --- /dev/null +++ b/drivers/net/ethernet/qualcomm/emac/emac-sgmii-fsm9900.c @@ -0,0 +1,245 @@ +/* Copyright (c) 2015-2016, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* Qualcomm Technologies, Inc. FSM9900 EMAC SGMII Controller driver. + */ + +#include <linux/iopoll.h> +#include "emac.h" + +/* EMAC_QSERDES register offsets */ +#define EMAC_QSERDES_COM_SYS_CLK_CTRL 0x0000 +#define EMAC_QSERDES_COM_PLL_CNTRL 0x0014 +#define EMAC_QSERDES_COM_PLL_IP_SETI 0x0018 +#define EMAC_QSERDES_COM_PLL_CP_SETI 0x0024 +#define EMAC_QSERDES_COM_PLL_IP_SETP 0x0028 +#define EMAC_QSERDES_COM_PLL_CP_SETP 0x002c +#define EMAC_QSERDES_COM_SYSCLK_EN_SEL 0x0038 +#define EMAC_QSERDES_COM_RESETSM_CNTRL 0x0040 +#define EMAC_QSERDES_COM_PLLLOCK_CMP1 0x0044 +#define EMAC_QSERDES_COM_PLLLOCK_CMP2 0x0048 +#define EMAC_QSERDES_COM_PLLLOCK_CMP3 0x004c +#define EMAC_QSERDES_COM_PLLLOCK_CMP_EN 0x0050 +#define EMAC_QSERDES_COM_DEC_START1 0x0064 +#define EMAC_QSERDES_COM_DIV_FRAC_START1 0x0098 +#define EMAC_QSERDES_COM_DIV_FRAC_START2 0x009c +#define EMAC_QSERDES_COM_DIV_FRAC_START3 0x00a0 +#define EMAC_QSERDES_COM_DEC_START2 0x00a4 +#define EMAC_QSERDES_COM_PLL_CRCTRL 0x00ac +#define EMAC_QSERDES_COM_RESET_SM 0x00bc +#define EMAC_QSERDES_TX_BIST_MODE_LANENO 0x0100 +#define EMAC_QSERDES_TX_TX_EMP_POST1_LVL 0x0108 +#define EMAC_QSERDES_TX_TX_DRV_LVL 0x010c +#define EMAC_QSERDES_TX_LANE_MODE 0x0150 +#define EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN 0x0170 +#define EMAC_QSERDES_RX_CDR_CONTROL 0x0200 +#define EMAC_QSERDES_RX_CDR_CONTROL2 0x0210 +#define EMAC_QSERDES_RX_RX_EQ_GAIN12 0x0230 + +/* EMAC_SGMII register offsets */ +#define EMAC_SGMII_PHY_SERDES_START 0x0000 +#define EMAC_SGMII_PHY_CMN_PWR_CTRL 0x0004 +#define EMAC_SGMII_PHY_RX_PWR_CTRL 0x0008 +#define EMAC_SGMII_PHY_TX_PWR_CTRL 0x000C +#define EMAC_SGMII_PHY_LANE_CTRL1 0x0018 +#define EMAC_SGMII_PHY_CDR_CTRL0 0x0058 +#define EMAC_SGMII_PHY_POW_DWN_CTRL0 0x0080 +#define EMAC_SGMII_PHY_INTERRUPT_MASK 0x00b4 + +#define PLL_IPSETI(x) ((x) & 0x3f) + +#define PLL_CPSETI(x) ((x) & 0xff) + +#define PLL_IPSETP(x) ((x) & 0x3f) + +#define PLL_CPSETP(x) ((x) & 0x1f) + +#define PLL_RCTRL(x) (((x) & 0xf) << 4) +#define PLL_CCTRL(x) ((x) & 0xf) + +#define LANE_MODE(x) ((x) & 0x1f) + +#define SYSCLK_CM BIT(4) +#define SYSCLK_AC_COUPLE BIT(3) + +#define OCP_EN BIT(5) +#define PLL_DIV_FFEN BIT(2) +#define PLL_DIV_ORD BIT(1) + +#define SYSCLK_SEL_CMOS BIT(3) + +#define FRQ_TUNE_MODE BIT(4) + +#define PLLLOCK_CMP_EN BIT(0) + +#define DEC_START1_MUX BIT(7) +#define DEC_START1(x) ((x) & 0x7f) + +#define DIV_FRAC_START_MUX BIT(7) +#define DIV_FRAC_START(x) ((x) & 0x7f) + +#define DIV_FRAC_START3_MUX BIT(4) +#define DIV_FRAC_START3(x) ((x) & 0xf) + +#define DEC_START2_MUX BIT(1) +#define DEC_START2 BIT(0) + +#define READY BIT(5) + +#define TX_EMP_POST1_LVL_MUX BIT(5) +#define TX_EMP_POST1_LVL(x) ((x) & 0x1f) + +#define TX_DRV_LVL_MUX BIT(4) +#define TX_DRV_LVL(x) ((x) & 0xf) + +#define EMP_EN_MUX BIT(1) +#define EMP_EN BIT(0) + +#define SECONDORDERENABLE BIT(6) +#define FIRSTORDER_THRESH(x) (((x) & 0x7) << 3) +#define SECONDORDERGAIN(x) ((x) & 0x7) + +#define RX_EQ_GAIN2(x) (((x) & 0xf) << 4) +#define RX_EQ_GAIN1(x) ((x) & 0xf) + +#define SERDES_START BIT(0) + +#define BIAS_EN BIT(6) +#define PLL_EN BIT(5) +#define SYSCLK_EN BIT(4) +#define CLKBUF_L_EN BIT(3) +#define PLL_TXCLK_EN BIT(1) +#define PLL_RXCLK_EN BIT(0) + +#define L0_RX_SIGDET_EN BIT(7) +#define L0_RX_TERM_MODE(x) (((x) & 3) << 4) +#define L0_RX_I_EN BIT(1) + +#define L0_TX_EN BIT(5) +#define L0_CLKBUF_EN BIT(4) +#define L0_TRAN_BIAS_EN BIT(1) + +#define L0_RX_EQUALIZE_ENABLE BIT(6) +#define L0_RESET_TSYNC_EN BIT(4) +#define L0_DRV_LVL(x) ((x) & 0xf) + +#define PWRDN_B BIT(0) +#define CDR_MAX_CNT(x) ((x) & 0xff) + +#define PLLLOCK_CMP(x) ((x) & 0xff) + +#define SERDES_START_WAIT_TIMES 100 + +struct emac_reg_write { + unsigned int offset; + u32 val; +}; + +static void emac_reg_write_all(void __iomem *base, + const struct emac_reg_write *itr, size_t size) +{ + size_t i; + + for (i = 0; i < size; ++itr, ++i) + writel(itr->val, base + itr->offset); +} + +static const struct emac_reg_write physical_coding_sublayer_programming[] = { + {EMAC_SGMII_PHY_CDR_CTRL0, CDR_MAX_CNT(15)}, + {EMAC_SGMII_PHY_POW_DWN_CTRL0, PWRDN_B}, + {EMAC_SGMII_PHY_CMN_PWR_CTRL, + BIAS_EN | SYSCLK_EN | CLKBUF_L_EN | PLL_TXCLK_EN | PLL_RXCLK_EN}, + {EMAC_SGMII_PHY_TX_PWR_CTRL, L0_TX_EN | L0_CLKBUF_EN | L0_TRAN_BIAS_EN}, + {EMAC_SGMII_PHY_RX_PWR_CTRL, + L0_RX_SIGDET_EN | L0_RX_TERM_MODE(1) | L0_RX_I_EN}, + {EMAC_SGMII_PHY_CMN_PWR_CTRL, + BIAS_EN | PLL_EN | SYSCLK_EN | CLKBUF_L_EN | PLL_TXCLK_EN | + PLL_RXCLK_EN}, + {EMAC_SGMII_PHY_LANE_CTRL1, + L0_RX_EQUALIZE_ENABLE | L0_RESET_TSYNC_EN | L0_DRV_LVL(15)}, +}; + +static const struct emac_reg_write sysclk_refclk_setting[] = { + {EMAC_QSERDES_COM_SYSCLK_EN_SEL, SYSCLK_SEL_CMOS}, + {EMAC_QSERDES_COM_SYS_CLK_CTRL, SYSCLK_CM | SYSCLK_AC_COUPLE}, +}; + +static const struct emac_reg_write pll_setting[] = { + {EMAC_QSERDES_COM_PLL_IP_SETI, PLL_IPSETI(1)}, + {EMAC_QSERDES_COM_PLL_CP_SETI, PLL_CPSETI(59)}, + {EMAC_QSERDES_COM_PLL_IP_SETP, PLL_IPSETP(10)}, + {EMAC_QSERDES_COM_PLL_CP_SETP, PLL_CPSETP(9)}, + {EMAC_QSERDES_COM_PLL_CRCTRL, PLL_RCTRL(15) | PLL_CCTRL(11)}, + {EMAC_QSERDES_COM_PLL_CNTRL, OCP_EN | PLL_DIV_FFEN | PLL_DIV_ORD}, + {EMAC_QSERDES_COM_DEC_START1, DEC_START1_MUX | DEC_START1(2)}, + {EMAC_QSERDES_COM_DEC_START2, DEC_START2_MUX | DEC_START2}, + {EMAC_QSERDES_COM_DIV_FRAC_START1, + DIV_FRAC_START_MUX | DIV_FRAC_START(85)}, + {EMAC_QSERDES_COM_DIV_FRAC_START2, + DIV_FRAC_START_MUX | DIV_FRAC_START(42)}, + {EMAC_QSERDES_COM_DIV_FRAC_START3, + DIV_FRAC_START3_MUX | DIV_FRAC_START3(3)}, + {EMAC_QSERDES_COM_PLLLOCK_CMP1, PLLLOCK_CMP(43)}, + {EMAC_QSERDES_COM_PLLLOCK_CMP2, PLLLOCK_CMP(104)}, + {EMAC_QSERDES_COM_PLLLOCK_CMP3, PLLLOCK_CMP(0)}, + {EMAC_QSERDES_COM_PLLLOCK_CMP_EN, PLLLOCK_CMP_EN}, + {EMAC_QSERDES_COM_RESETSM_CNTRL, FRQ_TUNE_MODE}, +}; + +static const struct emac_reg_write cdr_setting[] = { + {EMAC_QSERDES_RX_CDR_CONTROL, + SECONDORDERENABLE | FIRSTORDER_THRESH(3) | SECONDORDERGAIN(2)}, + {EMAC_QSERDES_RX_CDR_CONTROL2, + SECONDORDERENABLE | FIRSTORDER_THRESH(3) | SECONDORDERGAIN(4)}, +}; + +static const struct emac_reg_write tx_rx_setting[] = { + {EMAC_QSERDES_TX_BIST_MODE_LANENO, 0}, + {EMAC_QSERDES_TX_TX_DRV_LVL, TX_DRV_LVL_MUX | TX_DRV_LVL(15)}, + {EMAC_QSERDES_TX_TRAN_DRVR_EMP_EN, EMP_EN_MUX | EMP_EN}, + {EMAC_QSERDES_TX_TX_EMP_POST1_LVL, + TX_EMP_POST1_LVL_MUX | TX_EMP_POST1_LVL(1)}, + {EMAC_QSERDES_RX_RX_EQ_GAIN12, RX_EQ_GAIN2(15) | RX_EQ_GAIN1(15)}, + {EMAC_QSERDES_TX_LANE_MODE, LANE_MODE(8)}, +}; + +int emac_sgmii_init_fsm9900(struct emac_adapter *adpt) +{ + struct emac_phy *phy = &adpt->phy; + unsigned int i; + + emac_reg_write_all(phy->base, physical_coding_sublayer_programming, + ARRAY_SIZE(physical_coding_sublayer_programming)); + emac_reg_write_all(phy->base, sysclk_refclk_setting, + ARRAY_SIZE(sysclk_refclk_setting)); + emac_reg_write_all(phy->base, pll_setting, ARRAY_SIZE(pll_setting)); + emac_reg_write_all(phy->base, cdr_setting, ARRAY_SIZE(cdr_setting)); + emac_reg_write_all(phy->base, tx_rx_setting, ARRAY_SIZE(tx_rx_setting)); + + /* Power up the Ser/Des engine */ + writel(SERDES_START, phy->base + EMAC_SGMII_PHY_SERDES_START); + + for (i = 0; i < SERDES_START_WAIT_TIMES; i++) { + if (readl(phy->base + EMAC_QSERDES_COM_RESET_SM) & READY) + break; + usleep_range(100, 200); + } + + if (i == SERDES_START_WAIT_TIMES) { + netdev_err(adpt->netdev, "error: ser/des failed to start\n"); + return -EIO; + } + /* Mask out all the SGMII Interrupt */ + writel(0, phy->base + EMAC_SGMII_PHY_INTERRUPT_MASK); + + return 0; +} |