diff options
author | Roger Quadros <rogerq@ti.com> | 2019-03-22 10:58:05 +0200 |
---|---|---|
committer | Kishon Vijay Abraham I <kishon@ti.com> | 2019-04-17 14:13:05 +0530 |
commit | fdef2f9f700fab55c36d45e7c46607e935886c6c (patch) | |
tree | d40fa38116a8bbd99b33e05bd7c8326bbf87fafe /drivers/phy/ti | |
parent | 22940823f0629b2068c259fb859ed150b8563d8a (diff) | |
download | linux-fdef2f9f700fab55c36d45e7c46607e935886c6c.tar.bz2 |
phy: ti-pipe3: improve DPLL stability for SATA & USB
For increased DPLL stability use the settings recommended in
the TRM [1] for PHY_RX registers for SATA and USB.
For SATA we need to use spread spectrum settings even
though we don't have spread spectrum enabled. The
suggested non-spread spectrum settings don't work.
[1] DRA75x, DRA74x TRM - http://www.ti.com/lit/ug/sprui30f/sprui30f.pdf
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy/ti')
-rw-r--r-- | drivers/phy/ti/phy-ti-pipe3.c | 215 |
1 files changed, 173 insertions, 42 deletions
diff --git a/drivers/phy/ti/phy-ti-pipe3.c b/drivers/phy/ti/phy-ti-pipe3.c index c3e0499bed3e..c596e27bae65 100644 --- a/drivers/phy/ti/phy-ti-pipe3.c +++ b/drivers/phy/ti/phy-ti-pipe3.c @@ -68,39 +68,61 @@ #define PCIE_PCS_MASK 0xFF0000 #define PCIE_PCS_DELAY_COUNT_SHIFT 0x10 -#define PCIEPHYRX_ANA_PROGRAMMABILITY 0x0000000C +#define PIPE3_PHY_RX_ANA_PROGRAMMABILITY 0x0000000C #define INTERFACE_MASK GENMASK(31, 27) #define INTERFACE_SHIFT 27 +#define INTERFACE_MODE_USBSS BIT(4) +#define INTERFACE_MODE_SATA_1P5 BIT(3) +#define INTERFACE_MODE_SATA_3P0 BIT(2) +#define INTERFACE_MODE_PCIE BIT(0) + #define LOSD_MASK GENMASK(17, 14) #define LOSD_SHIFT 14 #define MEM_PLLDIV GENMASK(6, 5) -#define PCIEPHYRX_TRIM 0x0000001C -#define MEM_DLL_TRIM_SEL GENMASK(31, 30) +#define PIPE3_PHY_RX_TRIM 0x0000001C +#define MEM_DLL_TRIM_SEL_MASK GENMASK(31, 30) #define MEM_DLL_TRIM_SHIFT 30 -#define PCIEPHYRX_DLL 0x00000024 -#define MEM_DLL_PHINT_RATE GENMASK(31, 30) +#define PIPE3_PHY_RX_DLL 0x00000024 +#define MEM_DLL_PHINT_RATE_MASK GENMASK(31, 30) +#define MEM_DLL_PHINT_RATE_SHIFT 30 -#define PCIEPHYRX_DIGITAL_MODES 0x00000028 +#define PIPE3_PHY_RX_DIGITAL_MODES 0x00000028 +#define MEM_HS_RATE_MASK GENMASK(28, 27) +#define MEM_HS_RATE_SHIFT 27 +#define MEM_OVRD_HS_RATE BIT(26) +#define MEM_OVRD_HS_RATE_SHIFT 26 #define MEM_CDR_FASTLOCK BIT(23) -#define MEM_CDR_LBW GENMASK(22, 21) -#define MEM_CDR_STEPCNT GENMASK(20, 19) +#define MEM_CDR_FASTLOCK_SHIFT 23 +#define MEM_CDR_LBW_MASK GENMASK(22, 21) +#define MEM_CDR_LBW_SHIFT 21 +#define MEM_CDR_STEPCNT_MASK GENMASK(20, 19) +#define MEM_CDR_STEPCNT_SHIFT 19 #define MEM_CDR_STL_MASK GENMASK(18, 16) #define MEM_CDR_STL_SHIFT 16 #define MEM_CDR_THR_MASK GENMASK(15, 13) #define MEM_CDR_THR_SHIFT 13 #define MEM_CDR_THR_MODE BIT(12) -#define MEM_CDR_CDR_2NDO_SDM_MODE BIT(11) -#define MEM_OVRD_HS_RATE BIT(26) - -#define PCIEPHYRX_EQUALIZER 0x00000038 -#define MEM_EQLEV GENMASK(31, 16) -#define MEM_EQFTC GENMASK(15, 11) -#define MEM_EQCTL GENMASK(10, 7) +#define MEM_CDR_THR_MODE_SHIFT 12 +#define MEM_CDR_2NDO_SDM_MODE BIT(11) +#define MEM_CDR_2NDO_SDM_MODE_SHIFT 11 + +#define PIPE3_PHY_RX_EQUALIZER 0x00000038 +#define MEM_EQLEV_MASK GENMASK(31, 16) +#define MEM_EQLEV_SHIFT 16 +#define MEM_EQFTC_MASK GENMASK(15, 11) +#define MEM_EQFTC_SHIFT 11 +#define MEM_EQCTL_MASK GENMASK(10, 7) #define MEM_EQCTL_SHIFT 7 #define MEM_OVRD_EQLEV BIT(2) +#define MEM_OVRD_EQLEV_SHIFT 2 #define MEM_OVRD_EQFTC BIT(1) +#define MEM_OVRD_EQFTC_SHIFT 1 + +#define SATA_PHY_RX_IO_AND_A2D_OVERRIDES 0x44 +#define MEM_CDR_LOS_SOURCE_MASK GENMASK(10, 9) +#define MEM_CDR_LOS_SOURCE_SHIFT 9 /* * This is an Empirical value that works, need to confirm the actual @@ -127,6 +149,27 @@ struct pipe3_dpll_map { struct pipe3_dpll_params params; }; +struct pipe3_settings { + u8 ana_interface; + u8 ana_losd; + u8 dig_fastlock; + u8 dig_lbw; + u8 dig_stepcnt; + u8 dig_stl; + u8 dig_thr; + u8 dig_thr_mode; + u8 dig_2ndo_sdm_mode; + u8 dig_hs_rate; + u8 dig_ovrd_hs_rate; + u8 dll_trim_sel; + u8 dll_phint_rate; + u8 eq_lev; + u8 eq_ftc; + u8 eq_ctl; + u8 eq_ovrd_lev; + u8 eq_ovrd_ftc; +}; + struct ti_pipe3 { void __iomem *pll_ctrl_base; void __iomem *phy_rx; @@ -146,6 +189,7 @@ struct ti_pipe3 { unsigned int pcie_pcs_reg; /* pcs reg. index in syscon */ bool sata_refclk_enabled; enum pipe3_mode mode; + struct pipe3_settings settings; }; static struct pipe3_dpll_map dpll_map_usb[] = { @@ -171,20 +215,84 @@ static struct pipe3_dpll_map dpll_map_sata[] = { struct pipe3_data { enum pipe3_mode mode; struct pipe3_dpll_map *dpll_map; + struct pipe3_settings settings; }; static struct pipe3_data data_usb = { .mode = PIPE3_MODE_USBSS, .dpll_map = dpll_map_usb, + .settings = { + /* DRA75x TRM Table 26-17 Preferred USB3_PHY_RX SCP Register Settings */ + .ana_interface = INTERFACE_MODE_USBSS, + .ana_losd = 0xa, + .dig_fastlock = 1, + .dig_lbw = 3, + .dig_stepcnt = 0, + .dig_stl = 0x3, + .dig_thr = 1, + .dig_thr_mode = 1, + .dig_2ndo_sdm_mode = 0, + .dig_hs_rate = 0, + .dig_ovrd_hs_rate = 1, + .dll_trim_sel = 0x2, + .dll_phint_rate = 0x3, + .eq_lev = 0, + .eq_ftc = 0, + .eq_ctl = 0x9, + .eq_ovrd_lev = 0, + .eq_ovrd_ftc = 0, + }, }; static struct pipe3_data data_sata = { .mode = PIPE3_MODE_SATA, .dpll_map = dpll_map_sata, + .settings = { + /* DRA75x TRM Table 26-9 Preferred SATA_PHY_RX SCP Register Settings */ + .ana_interface = INTERFACE_MODE_SATA_3P0, + .ana_losd = 0x5, + .dig_fastlock = 1, + .dig_lbw = 3, + .dig_stepcnt = 0, + .dig_stl = 0x3, + .dig_thr = 1, + .dig_thr_mode = 1, + .dig_2ndo_sdm_mode = 0, + .dig_hs_rate = 0, /* Not in TRM preferred settings */ + .dig_ovrd_hs_rate = 0, /* Not in TRM preferred settings */ + .dll_trim_sel = 0x1, + .dll_phint_rate = 0x2, /* for 1.5 GHz DPLL clock */ + .eq_lev = 0, + .eq_ftc = 0x1f, + .eq_ctl = 0, + .eq_ovrd_lev = 1, + .eq_ovrd_ftc = 1, + }, }; static struct pipe3_data data_pcie = { .mode = PIPE3_MODE_PCIE, + .settings = { + /* DRA75x TRM Table 26-62 Preferred PCIe_PHY_RX SCP Register Settings */ + .ana_interface = INTERFACE_MODE_PCIE, + .ana_losd = 0xa, + .dig_fastlock = 1, + .dig_lbw = 3, + .dig_stepcnt = 0, + .dig_stl = 0x3, + .dig_thr = 1, + .dig_thr_mode = 1, + .dig_2ndo_sdm_mode = 0, + .dig_hs_rate = 0, + .dig_ovrd_hs_rate = 0, + .dll_trim_sel = 0x2, + .dll_phint_rate = 0x3, + .eq_lev = 0, + .eq_ftc = 0x1f, + .eq_ctl = 1, + .eq_ovrd_lev = 0, + .eq_ovrd_ftc = 0, + }, }; static inline u32 ti_pipe3_readl(void __iomem *addr, unsigned offset) @@ -324,32 +432,55 @@ static int ti_pipe3_dpll_program(struct ti_pipe3 *phy) static void ti_pipe3_calibrate(struct ti_pipe3 *phy) { u32 val; + struct pipe3_settings *s = &phy->settings; - val = ti_pipe3_readl(phy->phy_rx, PCIEPHYRX_ANA_PROGRAMMABILITY); + val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY); val &= ~(INTERFACE_MASK | LOSD_MASK | MEM_PLLDIV); - val |= (0x1 << INTERFACE_SHIFT | 0xA << LOSD_SHIFT); - ti_pipe3_writel(phy->phy_rx, PCIEPHYRX_ANA_PROGRAMMABILITY, val); - - val = ti_pipe3_readl(phy->phy_rx, PCIEPHYRX_DIGITAL_MODES); - val &= ~(MEM_CDR_STEPCNT | MEM_CDR_STL_MASK | MEM_CDR_THR_MASK | - MEM_CDR_CDR_2NDO_SDM_MODE | MEM_OVRD_HS_RATE); - val |= (MEM_CDR_FASTLOCK | MEM_CDR_LBW | 0x3 << MEM_CDR_STL_SHIFT | - 0x1 << MEM_CDR_THR_SHIFT | MEM_CDR_THR_MODE); - ti_pipe3_writel(phy->phy_rx, PCIEPHYRX_DIGITAL_MODES, val); - - val = ti_pipe3_readl(phy->phy_rx, PCIEPHYRX_TRIM); - val &= ~MEM_DLL_TRIM_SEL; - val |= 0x2 << MEM_DLL_TRIM_SHIFT; - ti_pipe3_writel(phy->phy_rx, PCIEPHYRX_TRIM, val); - - val = ti_pipe3_readl(phy->phy_rx, PCIEPHYRX_DLL); - val |= MEM_DLL_PHINT_RATE; - ti_pipe3_writel(phy->phy_rx, PCIEPHYRX_DLL, val); - - val = ti_pipe3_readl(phy->phy_rx, PCIEPHYRX_EQUALIZER); - val &= ~(MEM_EQLEV | MEM_EQCTL | MEM_OVRD_EQLEV | MEM_OVRD_EQFTC); - val |= MEM_EQFTC | 0x1 << MEM_EQCTL_SHIFT; - ti_pipe3_writel(phy->phy_rx, PCIEPHYRX_EQUALIZER, val); + val |= (s->ana_interface << INTERFACE_SHIFT | s->ana_losd << LOSD_SHIFT); + ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_ANA_PROGRAMMABILITY, val); + + val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES); + val &= ~(MEM_HS_RATE_MASK | MEM_OVRD_HS_RATE | MEM_CDR_FASTLOCK | + MEM_CDR_LBW_MASK | MEM_CDR_STEPCNT_MASK | MEM_CDR_STL_MASK | + MEM_CDR_THR_MASK | MEM_CDR_THR_MODE | MEM_CDR_2NDO_SDM_MODE); + val |= s->dig_hs_rate << MEM_HS_RATE_SHIFT | + s->dig_ovrd_hs_rate << MEM_OVRD_HS_RATE_SHIFT | + s->dig_fastlock << MEM_CDR_FASTLOCK_SHIFT | + s->dig_lbw << MEM_CDR_LBW_SHIFT | + s->dig_stepcnt << MEM_CDR_STEPCNT_SHIFT | + s->dig_stl << MEM_CDR_STL_SHIFT | + s->dig_thr << MEM_CDR_THR_SHIFT | + s->dig_thr_mode << MEM_CDR_THR_MODE_SHIFT | + s->dig_2ndo_sdm_mode << MEM_CDR_2NDO_SDM_MODE_SHIFT; + ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DIGITAL_MODES, val); + + val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_TRIM); + val &= ~MEM_DLL_TRIM_SEL_MASK; + val |= s->dll_trim_sel << MEM_DLL_TRIM_SHIFT; + ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_TRIM, val); + + val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_DLL); + val &= ~MEM_DLL_PHINT_RATE_MASK; + val |= s->dll_phint_rate << MEM_DLL_PHINT_RATE_SHIFT; + ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_DLL, val); + + val = ti_pipe3_readl(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER); + val &= ~(MEM_EQLEV_MASK | MEM_EQFTC_MASK | MEM_EQCTL_MASK | + MEM_OVRD_EQLEV | MEM_OVRD_EQFTC); + val |= s->eq_lev << MEM_EQLEV_SHIFT | + s->eq_ftc << MEM_EQFTC_SHIFT | + s->eq_ctl << MEM_EQCTL_SHIFT | + s->eq_ovrd_lev << MEM_OVRD_EQLEV_SHIFT | + s->eq_ovrd_ftc << MEM_OVRD_EQFTC_SHIFT; + ti_pipe3_writel(phy->phy_rx, PIPE3_PHY_RX_EQUALIZER, val); + + if (phy->mode == PIPE3_MODE_SATA) { + val = ti_pipe3_readl(phy->phy_rx, + SATA_PHY_RX_IO_AND_A2D_OVERRIDES); + val &= ~MEM_CDR_LOS_SOURCE_MASK; + ti_pipe3_writel(phy->phy_rx, SATA_PHY_RX_IO_AND_A2D_OVERRIDES, + val); + } } static int ti_pipe3_init(struct phy *x) @@ -401,6 +532,8 @@ static int ti_pipe3_init(struct phy *x) return -EINVAL; } + ti_pipe3_calibrate(phy); + return ret; } @@ -611,9 +744,6 @@ static int ti_pipe3_get_tx_rx_base(struct ti_pipe3 *phy) struct device *dev = phy->dev; struct platform_device *pdev = to_platform_device(dev); - if (phy->mode != PIPE3_MODE_PCIE) - return 0; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_rx"); phy->phy_rx = devm_ioremap_resource(dev, res); @@ -669,6 +799,7 @@ static int ti_pipe3_probe(struct platform_device *pdev) phy->dev = dev; phy->mode = data->mode; phy->dpll_map = data->dpll_map; + phy->settings = data->settings; ret = ti_pipe3_get_pll_base(phy); if (ret) |