diff options
Diffstat (limited to 'drivers/phy/phy-xgene.c')
| -rw-r--r-- | drivers/phy/phy-xgene.c | 1750 |
1 files changed, 1750 insertions, 0 deletions
diff --git a/drivers/phy/phy-xgene.c b/drivers/phy/phy-xgene.c new file mode 100644 index 00000000000..4aa1ccd1511 --- /dev/null +++ b/drivers/phy/phy-xgene.c @@ -0,0 +1,1750 @@ +/* + * AppliedMicro X-Gene Multi-purpose PHY driver + * + * Copyright (c) 2014, Applied Micro Circuits Corporation + * Author: Loc Ho <lho@apm.com> + * Tuan Phan <tphan@apm.com> + * Suman Tripathi <stripathi@apm.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * The APM X-Gene PHY consists of two PLL clock macro's (CMU) and lanes. + * The first PLL clock macro is used for internal reference clock. The second + * PLL clock macro is used to generate the clock for the PHY. This driver + * configures the first PLL CMU, the second PLL CMU, and programs the PHY to + * operate according to the mode of operation. The first PLL CMU is only + * required if internal clock is enabled. + * + * Logical Layer Out Of HW module units: + * + * ----------------- + * | Internal | |------| + * | Ref PLL CMU |----| | ------------- --------- + * ------------ ---- | MUX |-----|PHY PLL CMU|----| Serdes| + * | | | | --------- + * External Clock ------| | ------------- + * |------| + * + * The Ref PLL CMU CSR (Configuration System Registers) is accessed + * indirectly from the SDS offset at 0x2000. It is only required for + * internal reference clock. + * The PHY PLL CMU CSR is accessed indirectly from the SDS offset at 0x0000. + * The Serdes CSR is accessed indirectly from the SDS offset at 0x0400. + * + * The Ref PLL CMU can be located within the same PHY IP or outside the PHY IP + * due to shared Ref PLL CMU. For PHY with Ref PLL CMU shared with another IP, + * it is located outside the PHY IP. This is the case for the PHY located + * at 0x1f23a000 (SATA Port 4/5). For such PHY, another resource is required + * to located the SDS/Ref PLL CMU module and its clock for that IP enabled. + * + * Currently, this driver only supports Gen3 SATA mode with external clock. + */ +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/delay.h> +#include <linux/phy/phy.h> +#include <linux/clk.h> + +/* Max 2 lanes per a PHY unit */ +#define MAX_LANE 2 + +/* Register offset inside the PHY */ +#define SERDES_PLL_INDIRECT_OFFSET 0x0000 +#define SERDES_PLL_REF_INDIRECT_OFFSET 0x2000 +#define SERDES_INDIRECT_OFFSET 0x0400 +#define SERDES_LANE_STRIDE 0x0200 + +/* Some default Serdes parameters */ +#define DEFAULT_SATA_TXBOOST_GAIN { 0x1e, 0x1e, 0x1e } +#define DEFAULT_SATA_TXEYEDIRECTION { 0x0, 0x0, 0x0 } +#define DEFAULT_SATA_TXEYETUNING { 0xa, 0xa, 0xa } +#define DEFAULT_SATA_SPD_SEL { 0x1, 0x3, 0x7 } +#define DEFAULT_SATA_TXAMP { 0x8, 0x8, 0x8 } +#define DEFAULT_SATA_TXCN1 { 0x2, 0x2, 0x2 } +#define DEFAULT_SATA_TXCN2 { 0x0, 0x0, 0x0 } +#define DEFAULT_SATA_TXCP1 { 0xa, 0xa, 0xa } + +#define SATA_SPD_SEL_GEN3 0x7 +#define SATA_SPD_SEL_GEN2 0x3 +#define SATA_SPD_SEL_GEN1 0x1 + +#define SSC_DISABLE 0 +#define SSC_ENABLE 1 + +#define FBDIV_VAL_50M 0x77 +#define REFDIV_VAL_50M 0x1 +#define FBDIV_VAL_100M 0x3B +#define REFDIV_VAL_100M 0x0 + +/* SATA Clock/Reset CSR */ +#define SATACLKENREG 0x00000000 +#define SATA0_CORE_CLKEN 0x00000002 +#define SATA1_CORE_CLKEN 0x00000004 +#define SATASRESETREG 0x00000004 +#define SATA_MEM_RESET_MASK 0x00000020 +#define SATA_MEM_RESET_RD(src) (((src) & 0x00000020) >> 5) +#define SATA_SDS_RESET_MASK 0x00000004 +#define SATA_CSR_RESET_MASK 0x00000001 +#define SATA_CORE_RESET_MASK 0x00000002 +#define SATA_PMCLK_RESET_MASK 0x00000010 +#define SATA_PCLK_RESET_MASK 0x00000008 + +/* SDS CSR used for PHY Indirect access */ +#define SATA_ENET_SDS_PCS_CTL0 0x00000000 +#define REGSPEC_CFG_I_TX_WORDMODE0_SET(dst, src) \ + (((dst) & ~0x00070000) | (((u32) (src) << 16) & 0x00070000)) +#define REGSPEC_CFG_I_RX_WORDMODE0_SET(dst, src) \ + (((dst) & ~0x00e00000) | (((u32) (src) << 21) & 0x00e00000)) +#define SATA_ENET_SDS_CTL0 0x0000000c +#define REGSPEC_CFG_I_CUSTOMER_PIN_MODE0_SET(dst, src) \ + (((dst) & ~0x00007fff) | (((u32) (src)) & 0x00007fff)) +#define SATA_ENET_SDS_CTL1 0x00000010 +#define CFG_I_SPD_SEL_CDR_OVR1_SET(dst, src) \ + (((dst) & ~0x0000000f) | (((u32) (src)) & 0x0000000f)) +#define SATA_ENET_SDS_RST_CTL 0x00000024 +#define SATA_ENET_SDS_IND_CMD_REG 0x0000003c +#define CFG_IND_WR_CMD_MASK 0x00000001 +#define CFG_IND_RD_CMD_MASK 0x00000002 +#define CFG_IND_CMD_DONE_MASK 0x00000004 +#define CFG_IND_ADDR_SET(dst, src) \ + (((dst) & ~0x003ffff0) | (((u32) (src) << 4) & 0x003ffff0)) +#define SATA_ENET_SDS_IND_RDATA_REG 0x00000040 +#define SATA_ENET_SDS_IND_WDATA_REG 0x00000044 +#define SATA_ENET_CLK_MACRO_REG 0x0000004c +#define I_RESET_B_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src)) & 0x00000001)) +#define I_PLL_FBDIV_SET(dst, src) \ + (((dst) & ~0x001ff000) | (((u32) (src) << 12) & 0x001ff000)) +#define I_CUSTOMEROV_SET(dst, src) \ + (((dst) & ~0x00000f80) | (((u32) (src) << 7) & 0x00000f80)) +#define O_PLL_LOCK_RD(src) (((src) & 0x40000000) >> 30) +#define O_PLL_READY_RD(src) (((src) & 0x80000000) >> 31) + +/* PLL Clock Macro Unit (CMU) CSR accessing from SDS indirectly */ +#define CMU_REG0 0x00000 +#define CMU_REG0_PLL_REF_SEL_MASK 0x00002000 +#define CMU_REG0_PLL_REF_SEL_SET(dst, src) \ + (((dst) & ~0x00002000) | (((u32) (src) << 13) & 0x00002000)) +#define CMU_REG0_PDOWN_MASK 0x00004000 +#define CMU_REG0_CAL_COUNT_RESOL_SET(dst, src) \ + (((dst) & ~0x000000e0) | (((u32) (src) << 5) & 0x000000e0)) +#define CMU_REG1 0x00002 +#define CMU_REG1_PLL_CP_SET(dst, src) \ + (((dst) & ~0x00003c00) | (((u32) (src) << 10) & 0x00003c00)) +#define CMU_REG1_PLL_MANUALCAL_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define CMU_REG1_PLL_CP_SEL_SET(dst, src) \ + (((dst) & ~0x000003e0) | (((u32) (src) << 5) & 0x000003e0)) +#define CMU_REG1_REFCLK_CMOS_SEL_MASK 0x00000001 +#define CMU_REG1_REFCLK_CMOS_SEL_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src) << 0) & 0x00000001)) +#define CMU_REG2 0x00004 +#define CMU_REG2_PLL_REFDIV_SET(dst, src) \ + (((dst) & ~0x0000c000) | (((u32) (src) << 14) & 0x0000c000)) +#define CMU_REG2_PLL_LFRES_SET(dst, src) \ + (((dst) & ~0x0000001e) | (((u32) (src) << 1) & 0x0000001e)) +#define CMU_REG2_PLL_FBDIV_SET(dst, src) \ + (((dst) & ~0x00003fe0) | (((u32) (src) << 5) & 0x00003fe0)) +#define CMU_REG3 0x00006 +#define CMU_REG3_VCOVARSEL_SET(dst, src) \ + (((dst) & ~0x0000000f) | (((u32) (src) << 0) & 0x0000000f)) +#define CMU_REG3_VCO_MOMSEL_INIT_SET(dst, src) \ + (((dst) & ~0x000003f0) | (((u32) (src) << 4) & 0x000003f0)) +#define CMU_REG3_VCO_MANMOMSEL_SET(dst, src) \ + (((dst) & ~0x0000fc00) | (((u32) (src) << 10) & 0x0000fc00)) +#define CMU_REG4 0x00008 +#define CMU_REG5 0x0000a +#define CMU_REG5_PLL_LFSMCAP_SET(dst, src) \ + (((dst) & ~0x0000c000) | (((u32) (src) << 14) & 0x0000c000)) +#define CMU_REG5_PLL_LOCK_RESOLUTION_SET(dst, src) \ + (((dst) & ~0x0000000e) | (((u32) (src) << 1) & 0x0000000e)) +#define CMU_REG5_PLL_LFCAP_SET(dst, src) \ + (((dst) & ~0x00003000) | (((u32) (src) << 12) & 0x00003000)) +#define CMU_REG5_PLL_RESETB_MASK 0x00000001 +#define CMU_REG6 0x0000c +#define CMU_REG6_PLL_VREGTRIM_SET(dst, src) \ + (((dst) & ~0x00000600) | (((u32) (src) << 9) & 0x00000600)) +#define CMU_REG6_MAN_PVT_CAL_SET(dst, src) \ + (((dst) & ~0x00000004) | (((u32) (src) << 2) & 0x00000004)) +#define CMU_REG7 0x0000e +#define CMU_REG7_PLL_CALIB_DONE_RD(src) ((0x00004000 & (u32) (src)) >> 14) +#define CMU_REG7_VCO_CAL_FAIL_RD(src) ((0x00000c00 & (u32) (src)) >> 10) +#define CMU_REG8 0x00010 +#define CMU_REG9 0x00012 +#define CMU_REG9_WORD_LEN_8BIT 0x000 +#define CMU_REG9_WORD_LEN_10BIT 0x001 +#define CMU_REG9_WORD_LEN_16BIT 0x002 +#define CMU_REG9_WORD_LEN_20BIT 0x003 +#define CMU_REG9_WORD_LEN_32BIT 0x004 +#define CMU_REG9_WORD_LEN_40BIT 0x005 +#define CMU_REG9_WORD_LEN_64BIT 0x006 +#define CMU_REG9_WORD_LEN_66BIT 0x007 +#define CMU_REG9_TX_WORD_MODE_CH1_SET(dst, src) \ + (((dst) & ~0x00000380) | (((u32) (src) << 7) & 0x00000380)) +#define CMU_REG9_TX_WORD_MODE_CH0_SET(dst, src) \ + (((dst) & ~0x00000070) | (((u32) (src) << 4) & 0x00000070)) +#define CMU_REG9_PLL_POST_DIVBY2_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define CMU_REG9_VBG_BYPASSB_SET(dst, src) \ + (((dst) & ~0x00000004) | (((u32) (src) << 2) & 0x00000004)) +#define CMU_REG9_IGEN_BYPASS_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define CMU_REG10 0x00014 +#define CMU_REG10_VREG_REFSEL_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src) << 0) & 0x00000001)) +#define CMU_REG11 0x00016 +#define CMU_REG12 0x00018 +#define CMU_REG12_STATE_DELAY9_SET(dst, src) \ + (((dst) & ~0x000000f0) | (((u32) (src) << 4) & 0x000000f0)) +#define CMU_REG13 0x0001a +#define CMU_REG14 0x0001c +#define CMU_REG15 0x0001e +#define CMU_REG16 0x00020 +#define CMU_REG16_PVT_DN_MAN_ENA_MASK 0x00000001 +#define CMU_REG16_PVT_UP_MAN_ENA_MASK 0x00000002 +#define CMU_REG16_VCOCAL_WAIT_BTW_CODE_SET(dst, src) \ + (((dst) & ~0x0000001c) | (((u32) (src) << 2) & 0x0000001c)) +#define CMU_REG16_CALIBRATION_DONE_OVERRIDE_SET(dst, src) \ + (((dst) & ~0x00000040) | (((u32) (src) << 6) & 0x00000040)) +#define CMU_REG16_BYPASS_PLL_LOCK_SET(dst, src) \ + (((dst) & ~0x00000020) | (((u32) (src) << 5) & 0x00000020)) +#define CMU_REG17 0x00022 +#define CMU_REG17_PVT_CODE_R2A_SET(dst, src) \ + (((dst) & ~0x00007f00) | (((u32) (src) << 8) & 0x00007f00)) +#define CMU_REG17_RESERVED_7_SET(dst, src) \ + (((dst) & ~0x000000e0) | (((u32) (src) << 5) & 0x000000e0)) +#define CMU_REG17_PVT_TERM_MAN_ENA_MASK 0x00008000 +#define CMU_REG18 0x00024 +#define CMU_REG19 0x00026 +#define CMU_REG20 0x00028 +#define CMU_REG21 0x0002a +#define CMU_REG22 0x0002c +#define CMU_REG23 0x0002e +#define CMU_REG24 0x00030 +#define CMU_REG25 0x00032 +#define CMU_REG26 0x00034 +#define CMU_REG26_FORCE_PLL_LOCK_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src) << 0) & 0x00000001)) +#define CMU_REG27 0x00036 +#define CMU_REG28 0x00038 +#define CMU_REG29 0x0003a +#define CMU_REG30 0x0003c +#define CMU_REG30_LOCK_COUNT_SET(dst, src) \ + (((dst) & ~0x00000006) | (((u32) (src) << 1) & 0x00000006)) +#define CMU_REG30_PCIE_MODE_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define CMU_REG31 0x0003e +#define CMU_REG32 0x00040 +#define CMU_REG32_FORCE_VCOCAL_START_MASK 0x00004000 +#define CMU_REG32_PVT_CAL_WAIT_SEL_SET(dst, src) \ + (((dst) & ~0x00000006) | (((u32) (src) << 1) & 0x00000006)) +#define CMU_REG32_IREF_ADJ_SET(dst, src) \ + (((dst) & ~0x00000180) | (((u32) (src) << 7) & 0x00000180)) +#define CMU_REG33 0x00042 +#define CMU_REG34 0x00044 +#define CMU_REG34_VCO_CAL_VTH_LO_MAX_SET(dst, src) \ + (((dst) & ~0x0000000f) | (((u32) (src) << 0) & 0x0000000f)) +#define CMU_REG34_VCO_CAL_VTH_HI_MAX_SET(dst, src) \ + (((dst) & ~0x00000f00) | (((u32) (src) << 8) & 0x00000f00)) +#define CMU_REG34_VCO_CAL_VTH_LO_MIN_SET(dst, src) \ + (((dst) & ~0x000000f0) | (((u32) (src) << 4) & 0x000000f0)) +#define CMU_REG34_VCO_CAL_VTH_HI_MIN_SET(dst, src) \ + (((dst) & ~0x0000f000) | (((u32) (src) << 12) & 0x0000f000)) +#define CMU_REG35 0x00046 +#define CMU_REG35_PLL_SSC_MOD_SET(dst, src) \ + (((dst) & ~0x0000fe00) | (((u32) (src) << 9) & 0x0000fe00)) +#define CMU_REG36 0x00048 +#define CMU_REG36_PLL_SSC_EN_SET(dst, src) \ + (((dst) & ~0x00000010) | (((u32) (src) << 4) & 0x00000010)) +#define CMU_REG36_PLL_SSC_VSTEP_SET(dst, src) \ + (((dst) & ~0x0000ffc0) | (((u32) (src) << 6) & 0x0000ffc0)) +#define CMU_REG36_PLL_SSC_DSMSEL_SET(dst, src) \ + (((dst) & ~0x00000020) | (((u32) (src) << 5) & 0x00000020)) +#define CMU_REG37 0x0004a +#define CMU_REG38 0x0004c +#define CMU_REG39 0x0004e + +/* PHY lane CSR accessing from SDS indirectly */ +#define RXTX_REG0 0x000 +#define RXTX_REG0_CTLE_EQ_HR_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG0_CTLE_EQ_QR_SET(dst, src) \ + (((dst) & ~0x000007c0) | (((u32) (src) << 6) & 0x000007c0)) +#define RXTX_REG0_CTLE_EQ_FR_SET(dst, src) \ + (((dst) & ~0x0000003e) | (((u32) (src) << 1) & 0x0000003e)) +#define RXTX_REG1 0x002 +#define RXTX_REG1_RXACVCM_SET(dst, src) \ + (((dst) & ~0x0000f000) | (((u32) (src) << 12) & 0x0000f000)) +#define RXTX_REG1_CTLE_EQ_SET(dst, src) \ + (((dst) & ~0x00000f80) | (((u32) (src) << 7) & 0x00000f80)) +#define RXTX_REG1_RXVREG1_SET(dst, src) \ + (((dst) & ~0x00000060) | (((u32) (src) << 5) & 0x00000060)) +#define RXTX_REG1_RXIREF_ADJ_SET(dst, src) \ + (((dst) & ~0x00000006) | (((u32) (src) << 1) & 0x00000006)) +#define RXTX_REG2 0x004 +#define RXTX_REG2_VTT_ENA_SET(dst, src) \ + (((dst) & ~0x00000100) | (((u32) (src) << 8) & 0x00000100)) +#define RXTX_REG2_TX_FIFO_ENA_SET(dst, src) \ + (((dst) & ~0x00000020) | (((u32) (src) << 5) & 0x00000020)) +#define RXTX_REG2_VTT_SEL_SET(dst, src) \ + (((dst) & ~0x000000c0) | (((u32) (src) << 6) & 0x000000c0)) +#define RXTX_REG4 0x008 +#define RXTX_REG4_TX_LOOPBACK_BUF_EN_MASK 0x00000040 +#define RXTX_REG4_TX_DATA_RATE_SET(dst, src) \ + (((dst) & ~0x0000c000) | (((u32) (src) << 14) & 0x0000c000)) +#define RXTX_REG4_TX_WORD_MODE_SET(dst, src) \ + (((dst) & ~0x00003800) | (((u32) (src) << 11) & 0x00003800)) +#define RXTX_REG5 0x00a +#define RXTX_REG5_TX_CN1_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG5_TX_CP1_SET(dst, src) \ + (((dst) & ~0x000007e0) | (((u32) (src) << 5) & 0x000007e0)) +#define RXTX_REG5_TX_CN2_SET(dst, src) \ + (((dst) & ~0x0000001f) | (((u32) (src) << 0) & 0x0000001f)) +#define RXTX_REG6 0x00c +#define RXTX_REG6_TXAMP_CNTL_SET(dst, src) \ + (((dst) & ~0x00000780) | (((u32) (src) << 7) & 0x00000780)) +#define RXTX_REG6_TXAMP_ENA_SET(dst, src) \ + (((dst) & ~0x00000040) | (((u32) (src) << 6) & 0x00000040)) +#define RXTX_REG6_RX_BIST_ERRCNT_RD_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src) << 0) & 0x00000001)) +#define RXTX_REG6_TX_IDLE_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define RXTX_REG6_RX_BIST_RESYNC_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define RXTX_REG7 0x00e +#define RXTX_REG7_RESETB_RXD_MASK 0x00000100 +#define RXTX_REG7_RESETB_RXA_MASK 0x00000080 +#define RXTX_REG7_BIST_ENA_RX_SET(dst, src) \ + (((dst) & ~0x00000040) | (((u32) (src) << 6) & 0x00000040)) +#define RXTX_REG7_RX_WORD_MODE_SET(dst, src) \ + (((dst) & ~0x00003800) | (((u32) (src) << 11) & 0x00003800)) +#define RXTX_REG8 0x010 +#define RXTX_REG8_CDR_LOOP_ENA_SET(dst, src) \ + (((dst) & ~0x00004000) | (((u32) (src) << 14) & 0x00004000)) +#define RXTX_REG8_CDR_BYPASS_RXLOS_SET(dst, src) \ + (((dst) & ~0x00000800) | (((u32) (src) << 11) & 0x00000800)) +#define RXTX_REG8_SSC_ENABLE_SET(dst, src) \ + (((dst) & ~0x00000200) | (((u32) (src) << 9) & 0x00000200)) +#define RXTX_REG8_SD_VREF_SET(dst, src) \ + (((dst) & ~0x000000f0) | (((u32) (src) << 4) & 0x000000f0)) +#define RXTX_REG8_SD_DISABLE_SET(dst, src) \ + (((dst) & ~0x00000100) | (((u32) (src) << 8) & 0x00000100)) +#define RXTX_REG7 0x00e +#define RXTX_REG7_RESETB_RXD_SET(dst, src) \ + (((dst) & ~0x00000100) | (((u32) (src) << 8) & 0x00000100)) +#define RXTX_REG7_RESETB_RXA_SET(dst, src) \ + (((dst) & ~0x00000080) | (((u32) (src) << 7) & 0x00000080)) +#define RXTX_REG7_LOOP_BACK_ENA_CTLE_MASK 0x00004000 +#define RXTX_REG7_LOOP_BACK_ENA_CTLE_SET(dst, src) \ + (((dst) & ~0x00004000) | (((u32) (src) << 14) & 0x00004000)) +#define RXTX_REG11 0x016 +#define RXTX_REG11_PHASE_ADJUST_LIMIT_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG12 0x018 +#define RXTX_REG12_LATCH_OFF_ENA_SET(dst, src) \ + (((dst) & ~0x00002000) | (((u32) (src) << 13) & 0x00002000)) +#define RXTX_REG12_SUMOS_ENABLE_SET(dst, src) \ + (((dst) & ~0x00000004) | (((u32) (src) << 2) & 0x00000004)) +#define RXTX_REG12_RX_DET_TERM_ENABLE_MASK 0x00000002 +#define RXTX_REG12_RX_DET_TERM_ENABLE_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define RXTX_REG13 0x01a +#define RXTX_REG14 0x01c +#define RXTX_REG14_CLTE_LATCAL_MAN_PROG_SET(dst, src) \ + (((dst) & ~0x0000003f) | (((u32) (src) << 0) & 0x0000003f)) +#define RXTX_REG14_CTLE_LATCAL_MAN_ENA_SET(dst, src) \ + (((dst) & ~0x00000040) | (((u32) (src) << 6) & 0x00000040)) +#define RXTX_REG26 0x034 +#define RXTX_REG26_PERIOD_ERROR_LATCH_SET(dst, src) \ + (((dst) & ~0x00003800) | (((u32) (src) << 11) & 0x00003800)) +#define RXTX_REG26_BLWC_ENA_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define RXTX_REG21 0x02a +#define RXTX_REG21_DO_LATCH_CALOUT_RD(src) ((0x0000fc00 & (u32) (src)) >> 10) +#define RXTX_REG21_XO_LATCH_CALOUT_RD(src) ((0x000003f0 & (u32) (src)) >> 4) +#define RXTX_REG21_LATCH_CAL_FAIL_ODD_RD(src) ((0x0000000f & (u32)(src))) +#define RXTX_REG22 0x02c +#define RXTX_REG22_SO_LATCH_CALOUT_RD(src) ((0x000003f0 & (u32) (src)) >> 4) +#define RXTX_REG22_EO_LATCH_CALOUT_RD(src) ((0x0000fc00 & (u32) (src)) >> 10) +#define RXTX_REG22_LATCH_CAL_FAIL_EVEN_RD(src) ((0x0000000f & (u32)(src))) +#define RXTX_REG23 0x02e +#define RXTX_REG23_DE_LATCH_CALOUT_RD(src) ((0x0000fc00 & (u32) (src)) >> 10) +#define RXTX_REG23_XE_LATCH_CALOUT_RD(src) ((0x000003f0 & (u32) (src)) >> 4) +#define RXTX_REG24 0x030 +#define RXTX_REG24_EE_LATCH_CALOUT_RD(src) ((0x0000fc00 & (u32) (src)) >> 10) +#define RXTX_REG24_SE_LATCH_CALOUT_RD(src) ((0x000003f0 & (u32) (src)) >> 4) +#define RXTX_REG27 0x036 +#define RXTX_REG28 0x038 +#define RXTX_REG31 0x03e +#define RXTX_REG38 0x04c +#define RXTX_REG38_CUSTOMER_PINMODE_INV_SET(dst, src) \ + (((dst) & 0x0000fffe) | (((u32) (src) << 1) & 0x0000fffe)) +#define RXTX_REG39 0x04e +#define RXTX_REG40 0x050 +#define RXTX_REG41 0x052 +#define RXTX_REG42 0x054 +#define RXTX_REG43 0x056 +#define RXTX_REG44 0x058 +#define RXTX_REG45 0x05a +#define RXTX_REG46 0x05c +#define RXTX_REG47 0x05e +#define RXTX_REG48 0x060 +#define RXTX_REG49 0x062 +#define RXTX_REG50 0x064 +#define RXTX_REG51 0x066 +#define RXTX_REG52 0x068 +#define RXTX_REG53 0x06a +#define RXTX_REG54 0x06c +#define RXTX_REG55 0x06e +#define RXTX_REG61 0x07a +#define RXTX_REG61_ISCAN_INBERT_SET(dst, src) \ + (((dst) & ~0x00000010) | (((u32) (src) << 4) & 0x00000010)) +#define RXTX_REG61_LOADFREQ_SHIFT_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define RXTX_REG61_EYE_COUNT_WIDTH_SEL_SET(dst, src) \ + (((dst) & ~0x000000c0) | (((u32) (src) << 6) & 0x000000c0)) +#define RXTX_REG61_SPD_SEL_CDR_SET(dst, src) \ + (((dst) & ~0x00003c00) | (((u32) (src) << 10) & 0x00003c00)) +#define RXTX_REG62 0x07c +#define RXTX_REG62_PERIOD_H1_QLATCH_SET(dst, src) \ + (((dst) & ~0x00003800) | (((u32) (src) << 11) & 0x00003800)) +#define RXTX_REG81 0x0a2 +#define RXTX_REG89_MU_TH7_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG89_MU_TH8_SET(dst, src) \ + (((dst) & ~0x000007c0) | (((u32) (src) << 6) & 0x000007c0)) +#define RXTX_REG89_MU_TH9_SET(dst, src) \ + (((dst) & ~0x0000003e) | (((u32) (src) << 1) & 0x0000003e)) +#define RXTX_REG96 0x0c0 +#define RXTX_REG96_MU_FREQ1_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG96_MU_FREQ2_SET(dst, src) \ + (((dst) & ~0x000007c0) | (((u32) (src) << 6) & 0x000007c0)) +#define RXTX_REG96_MU_FREQ3_SET(dst, src) \ + (((dst) & ~0x0000003e) | (((u32) (src) << 1) & 0x0000003e)) +#define RXTX_REG99 0x0c6 +#define RXTX_REG99_MU_PHASE1_SET(dst, src) \ + (((dst) & ~0x0000f800) | (((u32) (src) << 11) & 0x0000f800)) +#define RXTX_REG99_MU_PHASE2_SET(dst, src) \ + (((dst) & ~0x000007c0) | (((u32) (src) << 6) & 0x000007c0)) +#define RXTX_REG99_MU_PHASE3_SET(dst, src) \ + (((dst) & ~0x0000003e) | (((u32) (src) << 1) & 0x0000003e)) +#define RXTX_REG102 0x0cc +#define RXTX_REG102_FREQLOOP_LIMIT_SET(dst, src) \ + (((dst) & ~0x00000060) | (((u32) (src) << 5) & 0x00000060)) +#define RXTX_REG114 0x0e4 +#define RXTX_REG121 0x0f2 +#define RXTX_REG121_SUMOS_CAL_CODE_RD(src) ((0x0000003e & (u32)(src)) >> 0x1) +#define RXTX_REG125 0x0fa +#define RXTX_REG125_PQ_REG_SET(dst, src) \ + (((dst) & ~0x0000fe00) | (((u32) (src) << 9) & 0x0000fe00)) +#define RXTX_REG125_SIGN_PQ_SET(dst, src) \ + (((dst) & ~0x00000100) | (((u32) (src) << 8) & 0x00000100)) +#define RXTX_REG125_SIGN_PQ_2C_SET(dst, src) \ + (((dst) & ~0x00000080) | (((u32) (src) << 7) & 0x00000080)) +#define RXTX_REG125_PHZ_MANUALCODE_SET(dst, src) \ + (((dst) & ~0x0000007c) | (((u32) (src) << 2) & 0x0000007c)) +#define RXTX_REG125_PHZ_MANUAL_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define RXTX_REG127 0x0fe +#define RXTX_REG127_FORCE_SUM_CAL_START_MASK 0x00000002 +#define RXTX_REG127_FORCE_LAT_CAL_START_MASK 0x00000004 +#define RXTX_REG127_FORCE_SUM_CAL_START_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define RXTX_REG127_FORCE_LAT_CAL_START_SET(dst, src) \ + (((dst) & ~0x00000004) | (((u32) (src) << 2) & 0x00000004)) +#define RXTX_REG127_LATCH_MAN_CAL_ENA_SET(dst, src) \ + (((dst) & ~0x00000008) | (((u32) (src) << 3) & 0x00000008)) +#define RXTX_REG127_DO_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x0000fc00) | (((u32) (src) << 10) & 0x0000fc00)) +#define RXTX_REG127_XO_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x000003f0) | (((u32) (src) << 4) & 0x000003f0)) +#define RXTX_REG128 0x100 +#define RXTX_REG128_LATCH_CAL_WAIT_SEL_SET(dst, src) \ + (((dst) & ~0x0000000c) | (((u32) (src) << 2) & 0x0000000c)) +#define RXTX_REG128_EO_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x0000fc00) | (((u32) (src) << 10) & 0x0000fc00)) +#define RXTX_REG128_SO_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x000003f0) | (((u32) (src) << 4) & 0x000003f0)) +#define RXTX_REG129 0x102 +#define RXTX_REG129_DE_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x0000fc00) | (((u32) (src) << 10) & 0x0000fc00)) +#define RXTX_REG129_XE_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x000003f0) | (((u32) (src) << 4) & 0x000003f0)) +#define RXTX_REG130 0x104 +#define RXTX_REG130_EE_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x0000fc00) | (((u32) (src) << 10) & 0x0000fc00)) +#define RXTX_REG130_SE_LATCH_MANCAL_SET(dst, src) \ + (((dst) & ~0x000003f0) | (((u32) (src) << 4) & 0x000003f0)) +#define RXTX_REG145 0x122 +#define RXTX_REG145_TX_IDLE_SATA_SET(dst, src) \ + (((dst) & ~0x00000001) | (((u32) (src) << 0) & 0x00000001)) +#define RXTX_REG145_RXES_ENA_SET(dst, src) \ + (((dst) & ~0x00000002) | (((u32) (src) << 1) & 0x00000002)) +#define RXTX_REG145_RXDFE_CONFIG_SET(dst, src) \ + (((dst) & ~0x0000c000) | (((u32) (src) << 14) & 0x0000c000)) +#define RXTX_REG145_RXVWES_LATENA_SET(dst, src) \ + (((dst) & ~0x00000004) | (((u32) (src) << 2) & 0x00000004)) +#define RXTX_REG147 0x126 +#define RXTX_REG148 0x128 + +/* Clock macro type */ +enum cmu_type_t { + REF_CMU = 0, /* Clock macro is the internal reference clock */ + PHY_CMU = 1, /* Clock macro is the PLL for the Serdes */ +}; + +enum mux_type_t { + MUX_SELECT_ATA = 0, /* Switch the MUX to ATA */ + MUX_SELECT_SGMMII = 0, /* Switch the MUX to SGMII */ +}; + +enum clk_type_t { + CLK_EXT_DIFF = 0, /* External differential */ + CLK_INT_DIFF = 1, /* Internal differential */ + CLK_INT_SING = 2, /* Internal single ended */ +}; + +enum phy_mode { + MODE_SATA = 0, /* List them for simple reference */ + MODE_SGMII = 1, + MODE_PCIE = 2, + MODE_USB = 3, + MODE_XFI = 4, + MODE_MAX +}; + +struct xgene_sata_override_param { + u32 speed[MAX_LANE]; /* Index for override parameter per lane */ + u32 txspeed[3]; /* Tx speed */ + u32 txboostgain[MAX_LANE*3]; /* Tx freq boost and gain control */ + u32 txeyetuning[MAX_LANE*3]; /* Tx eye tuning */ + u32 txeyedirection[MAX_LANE*3]; /* Tx eye tuning direction */ + u32 txamplitude[MAX_LANE*3]; /* Tx amplitude control */ + u32 txprecursor_cn1[MAX_LANE*3]; /* Tx emphasis taps 1st pre-cursor */ + u32 txprecursor_cn2[MAX_LANE*3]; /* Tx emphasis taps 2nd pre-cursor */ + u32 txpostcursor_cp1[MAX_LANE*3]; /* Tx emphasis taps post-cursor */ +}; + +struct xgene_phy_ctx { + struct device *dev; + struct phy *phy; + enum phy_mode mode; /* Mode of operation */ + enum clk_type_t clk_type; /* Input clock selection */ + void __iomem *sds_base; /* PHY CSR base addr */ + struct clk *clk; /* Optional clock */ + + /* Override Serdes parameters */ + struct xgene_sata_override_param sata_param; +}; + +/* + * For chip earlier than A3 version, enable this flag. + * To enable, pass boot argument phy_xgene.preA3Chip=1 + */ +static int preA3Chip; +MODULE_PARM_DESC(preA3Chip, "Enable pre-A3 chip support (1=enable 0=disable)"); +module_param_named(preA3Chip, preA3Chip, int, 0444); + +static void sds_wr(void __iomem *csr_base, u32 indirect_cmd_reg, + u32 indirect_data_reg, u32 addr, u32 data) +{ + unsigned long deadline = jiffies + HZ; + u32 val; + u32 cmd; + + cmd = CFG_IND_WR_CMD_MASK | CFG_IND_CMD_DONE_MASK; + cmd = CFG_IND_ADDR_SET(cmd, addr); + writel(data, csr_base + indirect_data_reg); + readl(csr_base + indirect_data_reg); /* Force a barrier */ + writel(cmd, csr_base + indirect_cmd_reg); + readl(csr_base + indirect_cmd_reg); /* Force a barrier */ + do { + val = readl(csr_base + indirect_cmd_reg); + } while (!(val & CFG_IND_CMD_DONE_MASK) && + time_before(jiffies, deadline)); + if (!(val & CFG_IND_CMD_DONE_MASK)) + pr_err("SDS WR timeout at 0x%p offset 0x%08X value 0x%08X\n", + csr_base + indirect_cmd_reg, addr, data); +} + +static void sds_rd(void __iomem *csr_base, u32 indirect_cmd_reg, + u32 indirect_data_reg, u32 addr, u32 *data) +{ + unsigned long deadline = jiffies + HZ; + u32 val; + u32 cmd; + + cmd = CFG_IND_RD_CMD_MASK | CFG_IND_CMD_DONE_MASK; + cmd = CFG_IND_ADDR_SET(cmd, addr); + writel(cmd, csr_base + indirect_cmd_reg); + readl(csr_base + indirect_cmd_reg); /* Force a barrier */ + do { + val = readl(csr_base + indirect_cmd_reg); + } while (!(val & CFG_IND_CMD_DONE_MASK) && + time_before(jiffies, deadline)); + *data = readl(csr_base + indirect_data_reg); + if (!(val & CFG_IND_CMD_DONE_MASK)) + pr_err("SDS WR timeout at 0x%p offset 0x%08X value 0x%08X\n", + csr_base + indirect_cmd_reg, addr, *data); +} + +static void cmu_wr(struct xgene_phy_ctx *ctx, enum cmu_type_t cmu_type, + u32 reg, u32 data) +{ + void __iomem *sds_base = ctx->sds_base; + u32 val; + + if (cmu_type == REF_CMU) + reg += SERDES_PLL_REF_INDIRECT_OFFSET; + else + reg += SERDES_PLL_INDIRECT_OFFSET; + sds_wr(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_WDATA_REG, reg, data); + sds_rd(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_RDATA_REG, reg, &val); + pr_debug("CMU WR addr 0x%X value 0x%08X <-> 0x%08X\n", reg, data, val); +} + +static void cmu_rd(struct xgene_phy_ctx *ctx, enum cmu_type_t cmu_type, + u32 reg, u32 *data) +{ + void __iomem *sds_base = ctx->sds_base; + + if (cmu_type == REF_CMU) + reg += SERDES_PLL_REF_INDIRECT_OFFSET; + else + reg += SERDES_PLL_INDIRECT_OFFSET; + sds_rd(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_RDATA_REG, reg, data); + pr_debug("CMU RD addr 0x%X value 0x%08X\n", reg, *data); +} + +static void cmu_toggle1to0(struct xgene_phy_ctx *ctx, enum cmu_type_t cmu_type, + u32 reg, u32 bits) +{ + u32 val; + + cmu_rd(ctx, cmu_type, reg, &val); + val |= bits; + cmu_wr(ctx, cmu_type, reg, val); + cmu_rd(ctx, cmu_type, reg, &val); + val &= ~bits; + cmu_wr(ctx, cmu_type, reg, val); +} + +static void cmu_clrbits(struct xgene_phy_ctx *ctx, enum cmu_type_t cmu_type, + u32 reg, u32 bits) +{ + u32 val; + + cmu_rd(ctx, cmu_type, reg, &val); + val &= ~bits; + cmu_wr(ctx, cmu_type, reg, val); +} + +static void cmu_setbits(struct xgene_phy_ctx *ctx, enum cmu_type_t cmu_type, + u32 reg, u32 bits) +{ + u32 val; + + cmu_rd(ctx, cmu_type, reg, &val); + val |= bits; + cmu_wr(ctx, cmu_type, reg, val); +} + +static void serdes_wr(struct xgene_phy_ctx *ctx, int lane, u32 reg, u32 data) +{ + void __iomem *sds_base = ctx->sds_base; + u32 val; + + reg += SERDES_INDIRECT_OFFSET; + reg += lane * SERDES_LANE_STRIDE; + sds_wr(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_WDATA_REG, reg, data); + sds_rd(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_RDATA_REG, reg, &val); + pr_debug("SERDES WR addr 0x%X value 0x%08X <-> 0x%08X\n", reg, data, + val); +} + +static void serdes_rd(struct xgene_phy_ctx *ctx, int lane, u32 reg, u32 *data) +{ + void __iomem *sds_base = ctx->sds_base; + + reg += SERDES_INDIRECT_OFFSET; + reg += lane * SERDES_LANE_STRIDE; + sds_rd(sds_base, SATA_ENET_SDS_IND_CMD_REG, + SATA_ENET_SDS_IND_RDATA_REG, reg, data); + pr_debug("SERDES RD addr 0x%X value 0x%08X\n", reg, *data); +} + +static void serdes_clrbits(struct xgene_phy_ctx *ctx, int lane, u32 reg, + u32 bits) +{ + u32 val; + + serdes_rd(ctx, lane, reg, &val); + val &= ~bits; + serdes_wr(ctx, lane, reg, val); +} + +static void serdes_setbits(struct xgene_phy_ctx *ctx, int lane, u32 reg, + u32 bits) +{ + u32 val; + + serdes_rd(ctx, lane, reg, &val); + val |= bits; + serdes_wr(ctx, lane, reg, val); +} + +static void xgene_phy_cfg_cmu_clk_type(struct xgene_phy_ctx *ctx, + enum cmu_type_t cmu_type, + enum clk_type_t clk_type) +{ + u32 val; + + /* Set the reset sequence delay for TX ready assertion */ + cmu_rd(ctx, cmu_type, CMU_REG12, &val); + val = CMU_REG12_STATE_DELAY9_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG12, val); + /* Set the programmable stage delays between various enable stages */ + cmu_wr(ctx, cmu_type, CMU_REG13, 0x0222); + cmu_wr(ctx, cmu_type, CMU_REG14, 0x2225); + + /* Configure clock type */ + if (clk_type == CLK_EXT_DIFF) { + /* Select external clock mux */ + cmu_rd(ctx, cmu_type, CMU_REG0, &val); + val = CMU_REG0_PLL_REF_SEL_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG0, val); + /* Select CMOS as reference clock */ + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_REFCLK_CMOS_SEL_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + dev_dbg(ctx->dev, "Set external reference clock\n"); + } else if (clk_type == CLK_INT_DIFF) { + /* Select internal clock mux */ + cmu_rd(ctx, cmu_type, CMU_REG0, &val); + val = CMU_REG0_PLL_REF_SEL_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG0, val); + /* Select CMOS as reference clock */ + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_REFCLK_CMOS_SEL_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + dev_dbg(ctx->dev, "Set internal reference clock\n"); + } else if (clk_type == CLK_INT_SING) { + /* + * NOTE: This clock type is NOT support for controller + * whose internal clock shared in the PCIe controller + * + * Select internal clock mux + */ + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_REFCLK_CMOS_SEL_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + /* Select CML as reference clock */ + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_REFCLK_CMOS_SEL_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + dev_dbg(ctx->dev, + "Set internal single ended reference clock\n"); + } +} + +static void xgene_phy_sata_cfg_cmu_core(struct xgene_phy_ctx *ctx, + enum cmu_type_t cmu_type, + enum clk_type_t clk_type) +{ + u32 val; + int ref_100MHz; + + if (cmu_type == REF_CMU) { + /* Set VCO calibration voltage threshold */ + cmu_rd(ctx, cmu_type, CMU_REG34, &val); + val = CMU_REG34_VCO_CAL_VTH_LO_MAX_SET(val, 0x7); + val = CMU_REG34_VCO_CAL_VTH_HI_MAX_SET(val, 0xc); + val = CMU_REG34_VCO_CAL_VTH_LO_MIN_SET(val, 0x3); + val = CMU_REG34_VCO_CAL_VTH_HI_MIN_SET(val, 0x8); + cmu_wr(ctx, cmu_type, CMU_REG34, val); + } + + /* Set the VCO calibration counter */ + cmu_rd(ctx, cmu_type, CMU_REG0, &val); + if (cmu_type == REF_CMU || preA3Chip) + val = CMU_REG0_CAL_COUNT_RESOL_SET(val, 0x4); + else + val = CMU_REG0_CAL_COUNT_RESOL_SET(val, 0x7); + cmu_wr(ctx, cmu_type, CMU_REG0, val); + + /* Configure PLL for calibration */ + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_PLL_CP_SET(val, 0x1); + if (cmu_type == REF_CMU || preA3Chip) + val = CMU_REG1_PLL_CP_SEL_SET(val, 0x5); + else + val = CMU_REG1_PLL_CP_SEL_SET(val, 0x3); + if (cmu_type == REF_CMU) + val = CMU_REG1_PLL_MANUALCAL_SET(val, 0x0); + else + val = CMU_REG1_PLL_MANUALCAL_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + + if (cmu_type != REF_CMU) + cmu_clrbits(ctx, cmu_type, CMU_REG5, CMU_REG5_PLL_RESETB_MASK); + + /* Configure the PLL for either 100MHz or 50MHz */ + cmu_rd(ctx, cmu_type, CMU_REG2, &val); + if (cmu_type == REF_CMU) { + val = CMU_REG2_PLL_LFRES_SET(val, 0xa); + ref_100MHz = 1; + } else { + val = CMU_REG2_PLL_LFRES_SET(val, 0x3); + if (clk_type == CLK_EXT_DIFF) + ref_100MHz = 0; + else + ref_100MHz = 1; + } + if (ref_100MHz) { + val = CMU_REG2_PLL_FBDIV_SET(val, FBDIV_VAL_100M); + val = CMU_REG2_PLL_REFDIV_SET(val, REFDIV_VAL_100M); + } else { + val = CMU_REG2_PLL_FBDIV_SET(val, FBDIV_VAL_50M); + val = CMU_REG2_PLL_REFDIV_SET(val, REFDIV_VAL_50M); + } + cmu_wr(ctx, cmu_type, CMU_REG2, val); + + /* Configure the VCO */ + cmu_rd(ctx, cmu_type, CMU_REG3, &val); + if (cmu_type == REF_CMU) { + val = CMU_REG3_VCOVARSEL_SET(val, 0x3); + val = CMU_REG3_VCO_MOMSEL_INIT_SET(val, 0x10); + } else { + val = CMU_REG3_VCOVARSEL_SET(val, 0xF); + if (preA3Chip) + val = CMU_REG3_VCO_MOMSEL_INIT_SET(val, 0x15); + else + val = CMU_REG3_VCO_MOMSEL_INIT_SET(val, 0x1a); + val = CMU_REG3_VCO_MANMOMSEL_SET(val, 0x15); + } + cmu_wr(ctx, cmu_type, CMU_REG3, val); + + /* Disable force PLL lock */ + cmu_rd(ctx, cmu_type, CMU_REG26, &val); + val = CMU_REG26_FORCE_PLL_LOCK_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG26, val); + + /* Setup PLL loop filter */ + cmu_rd(ctx, cmu_type, CMU_REG5, &val); + val = CMU_REG5_PLL_LFSMCAP_SET(val, 0x3); + val = CMU_REG5_PLL_LFCAP_SET(val, 0x3); + if (cmu_type == REF_CMU || !preA3Chip) + val = CMU_REG5_PLL_LOCK_RESOLUTION_SET(val, 0x7); + else + val = CMU_REG5_PLL_LOCK_RESOLUTION_SET(val, 0x4); + cmu_wr(ctx, cmu_type, CMU_REG5, val); + + /* Enable or disable manual calibration */ + cmu_rd(ctx, cmu_type, CMU_REG6, &val); + val = CMU_REG6_PLL_VREGTRIM_SET(val, preA3Chip ? 0x0 : 0x2); + val = CMU_REG6_MAN_PVT_CAL_SET(val, preA3Chip ? 0x1 : 0x0); + cmu_wr(ctx, cmu_type, CMU_REG6, val); + + /* Configure lane for 20-bits */ + if (cmu_type == PHY_CMU) { + cmu_rd(ctx, cmu_type, CMU_REG9, &val); + val = CMU_REG9_TX_WORD_MODE_CH1_SET(val, + CMU_REG9_WORD_LEN_20BIT); + val = CMU_REG9_TX_WORD_MODE_CH0_SET(val, + CMU_REG9_WORD_LEN_20BIT); + val = CMU_REG9_PLL_POST_DIVBY2_SET(val, 0x1); + if (!preA3Chip) { + val = CMU_REG9_VBG_BYPASSB_SET(val, 0x0); + val = CMU_REG9_IGEN_BYPASS_SET(val , 0x0); + } + cmu_wr(ctx, cmu_type, CMU_REG9, val); + + if (!preA3Chip) { + cmu_rd(ctx, cmu_type, CMU_REG10, &val); + val = CMU_REG10_VREG_REFSEL_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG10, val); + } + } + + cmu_rd(ctx, cmu_type, CMU_REG16, &val); + val = CMU_REG16_CALIBRATION_DONE_OVERRIDE_SET(val, 0x1); + val = CMU_REG16_BYPASS_PLL_LOCK_SET(val, 0x1); + if (cmu_type == REF_CMU || preA3Chip) + val = CMU_REG16_VCOCAL_WAIT_BTW_CODE_SET(val, 0x4); + else + val = CMU_REG16_VCOCAL_WAIT_BTW_CODE_SET(val, 0x7); + cmu_wr(ctx, cmu_type, CMU_REG16, val); + + /* Configure for SATA */ + cmu_rd(ctx, cmu_type, CMU_REG30, &val); + val = CMU_REG30_PCIE_MODE_SET(val, 0x0); + val = CMU_REG30_LOCK_COUNT_SET(val, 0x3); + cmu_wr(ctx, cmu_type, CMU_REG30, val); + + /* Disable state machine bypass */ + cmu_wr(ctx, cmu_type, CMU_REG31, 0xF); + + cmu_rd(ctx, cmu_type, CMU_REG32, &val); + val = CMU_REG32_PVT_CAL_WAIT_SEL_SET(val, 0x3); + if (cmu_type == REF_CMU || preA3Chip) + val = CMU_REG32_IREF_ADJ_SET(val, 0x3); + else + val = CMU_REG32_IREF_ADJ_SET(val, 0x1); + cmu_wr(ctx, cmu_type, CMU_REG32, val); + + /* Set VCO calibration threshold */ + if (cmu_type != REF_CMU && preA3Chip) + cmu_wr(ctx, cmu_type, CMU_REG34, 0x8d27); + else + cmu_wr(ctx, cmu_type, CMU_REG34, 0x873c); + + /* Set CTLE Override and override waiting from state machine */ + cmu_wr(ctx, cmu_type, CMU_REG37, 0xF00F); +} + +static void xgene_phy_ssc_enable(struct xgene_phy_ctx *ctx, + enum cmu_type_t cmu_type) +{ + u32 val; + + /* Set SSC modulation value */ + cmu_rd(ctx, cmu_type, CMU_REG35, &val); + val = CMU_REG35_PLL_SSC_MOD_SET(val, 98); + cmu_wr(ctx, cmu_type, CMU_REG35, val); + + /* Enable SSC, set vertical step and DSM value */ + cmu_rd(ctx, cmu_type, CMU_REG36, &val); + val = CMU_REG36_PLL_SSC_VSTEP_SET(val, 30); + val = CMU_REG36_PLL_SSC_EN_SET(val, 1); + val = CMU_REG36_PLL_SSC_DSMSEL_SET(val, 1); + cmu_wr(ctx, cmu_type, CMU_REG36, val); + + /* Reset the PLL */ + cmu_clrbits(ctx, cmu_type, CMU_REG5, CMU_REG5_PLL_RESETB_MASK); + cmu_setbits(ctx, cmu_type, CMU_REG5, CMU_REG5_PLL_RESETB_MASK); + + /* Force VCO calibration to restart */ + cmu_toggle1to0(ctx, cmu_type, CMU_REG32, + CMU_REG32_FORCE_VCOCAL_START_MASK); +} + +static void xgene_phy_sata_cfg_lanes(struct xgene_phy_ctx *ctx) +{ + u32 val; + u32 reg; + int i; + int lane; + + for (lane = 0; lane < MAX_LANE; lane++) { + serdes_wr(ctx, lane, RXTX_REG147, 0x6); + + /* Set boost control for quarter, half, and full rate */ + serdes_rd(ctx, lane, RXTX_REG0, &val); + val = RXTX_REG0_CTLE_EQ_HR_SET(val, 0x10); + val = RXTX_REG0_CTLE_EQ_QR_SET(val, 0x10); + val = RXTX_REG0_CTLE_EQ_FR_SET(val, 0x10); + serdes_wr(ctx, lane, RXTX_REG0, val); + + /* Set boost control value */ + serdes_rd(ctx, lane, RXTX_REG1, &val); + val = RXTX_REG1_RXACVCM_SET(val, 0x7); + val = RXTX_REG1_CTLE_EQ_SET(val, + ctx->sata_param.txboostgain[lane * 3 + + ctx->sata_param.speed[lane]]); + serdes_wr(ctx, lane, RXTX_REG1, val); + + /* Latch VTT value based on the termination to ground and + enable TX FIFO */ + serdes_rd(ctx, lane, RXTX_REG2, &val); + val = RXTX_REG2_VTT_ENA_SET(val, 0x1); + val = RXTX_REG2_VTT_SEL_SET(val, 0x1); + val = RXTX_REG2_TX_FIFO_ENA_SET(val, 0x1); + serdes_wr(ctx, lane, RXTX_REG2, val); + + /* Configure Tx for 20-bits */ + serdes_rd(ctx, lane, RXTX_REG4, &val); + val = RXTX_REG4_TX_WORD_MODE_SET(val, CMU_REG9_WORD_LEN_20BIT); + serdes_wr(ctx, lane, RXTX_REG4, val); + + if (!preA3Chip) { + serdes_rd(ctx, lane, RXTX_REG1, &val); + val = RXTX_REG1_RXVREG1_SET(val, 0x2); + val = RXTX_REG1_RXIREF_ADJ_SET(val, 0x2); + serdes_wr(ctx, lane, RXTX_REG1, val); + } + + /* Set pre-emphasis first 1 and 2, and post-emphasis values */ + serdes_rd(ctx, lane, RXTX_REG5, &val); + val = RXTX_REG5_TX_CN1_SET(val, + ctx->sata_param.txprecursor_cn1[lane * 3 + + ctx->sata_param.speed[lane]]); + val = RXTX_REG5_TX_CP1_SET(val, + ctx->sata_param.txpostcursor_cp1[lane * 3 + + ctx->sata_param.speed[lane]]); + val = RXTX_REG5_TX_CN2_SET(val, + ctx->sata_param.txprecursor_cn2[lane * 3 + + ctx->sata_param.speed[lane]]); + serdes_wr(ctx, lane, RXTX_REG5, val); + + /* Set TX amplitude value */ + serdes_rd(ctx, lane, RXTX_REG6, &val); + val = RXTX_REG6_TXAMP_CNTL_SET(val, + ctx->sata_param.txamplitude[lane * 3 + + ctx->sata_param.speed[lane]]); + val = RXTX_REG6_TXAMP_ENA_SET(val, 0x1); + val = RXTX_REG6_TX_IDLE_SET(val, 0x0); + val = RXTX_REG6_RX_BIST_RESYNC_SET(val, 0x0); + val = RXTX_REG6_RX_BIST_ERRCNT_RD_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG6, val); + + /* Configure Rx for 20-bits */ + serdes_rd(ctx, lane, RXTX_REG7, &val); + val = RXTX_REG7_BIST_ENA_RX_SET(val, 0x0); + val = RXTX_REG7_RX_WORD_MODE_SET(val, CMU_REG9_WORD_LEN_20BIT); + serdes_wr(ctx, lane, RXTX_REG7, val); + + /* Set CDR and LOS values and enable Rx SSC */ + serdes_rd(ctx, lane, RXTX_REG8, &val); + val = RXTX_REG8_CDR_LOOP_ENA_SET(val, 0x1); + val = RXTX_REG8_CDR_BYPASS_RXLOS_SET(val, 0x0); + val = RXTX_REG8_SSC_ENABLE_SET(val, 0x1); + val = RXTX_REG8_SD_DISABLE_SET(val, 0x0); + val = RXTX_REG8_SD_VREF_SET(val, 0x4); + serdes_wr(ctx, lane, RXTX_REG8, val); + + /* Set phase adjust upper/lower limits */ + serdes_rd(ctx, lane, RXTX_REG11, &val); + val = RXTX_REG11_PHASE_ADJUST_LIMIT_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG11, val); + + /* Enable Latch Off; disable SUMOS and Tx termination */ + serdes_rd(ctx, lane, RXTX_REG12, &val); + val = RXTX_REG12_LATCH_OFF_ENA_SET(val, 0x1); + val = RXTX_REG12_SUMOS_ENABLE_SET(val, 0x0); + val = RXTX_REG12_RX_DET_TERM_ENABLE_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG12, val); + + /* Set period error latch to 512T and enable BWL */ + serdes_rd(ctx, lane, RXTX_REG26, &val); + val = RXTX_REG26_PERIOD_ERROR_LATCH_SET(val, 0x0); + val = RXTX_REG26_BLWC_ENA_SET(val, 0x1); + serdes_wr(ctx, lane, RXTX_REG26, val); + + serdes_wr(ctx, lane, RXTX_REG28, 0x0); + + /* Set DFE loop preset value */ + serdes_wr(ctx, lane, RXTX_REG31, 0x0); + + /* Set Eye Monitor counter width to 12-bit */ + serdes_rd(ctx, lane, RXTX_REG61, &val); + val = RXTX_REG61_ISCAN_INBERT_SET(val, 0x1); + val = RXTX_REG61_LOADFREQ_SHIFT_SET(val, 0x0); + val = RXTX_REG61_EYE_COUNT_WIDTH_SEL_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG61, val); + + serdes_rd(ctx, lane, RXTX_REG62, &val); + val = RXTX_REG62_PERIOD_H1_QLATCH_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG62, val); + + /* Set BW select tap X for DFE loop */ + for (i = 0; i < 9; i++) { + reg = RXTX_REG81 + i * 2; + serdes_rd(ctx, lane, reg, &val); + val = RXTX_REG89_MU_TH7_SET(val, 0xe); + val = RXTX_REG89_MU_TH8_SET(val, 0xe); + val = RXTX_REG89_MU_TH9_SET(val, 0xe); + serdes_wr(ctx, lane, reg, val); + } + + /* Set BW select tap X for frequency adjust loop */ + for (i = 0; i < 3; i++) { + reg = RXTX_REG96 + i * 2; + serdes_rd(ctx, lane, reg, &val); + val = RXTX_REG96_MU_FREQ1_SET(val, 0x10); + val = RXTX_REG96_MU_FREQ2_SET(val, 0x10); + val = RXTX_REG96_MU_FREQ3_SET(val, 0x10); + serdes_wr(ctx, lane, reg, val); + } + + /* Set BW select tap X for phase adjust loop */ + for (i = 0; i < 3; i++) { + reg = RXTX_REG99 + i * 2; + serdes_rd(ctx, lane, reg, &val); + val = RXTX_REG99_MU_PHASE1_SET(val, 0x7); + val = RXTX_REG99_MU_PHASE2_SET(val, 0x7); + val = RXTX_REG99_MU_PHASE3_SET(val, 0x7); + serdes_wr(ctx, lane, reg, val); + } + + serdes_rd(ctx, lane, RXTX_REG102, &val); + val = RXTX_REG102_FREQLOOP_LIMIT_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG102, val); + + serdes_wr(ctx, lane, RXTX_REG114, 0xffe0); + + serdes_rd(ctx, lane, RXTX_REG125, &val); + val = RXTX_REG125_SIGN_PQ_SET(val, + ctx->sata_param.txeyedirection[lane * 3 + + ctx->sata_param.speed[lane]]); + val = RXTX_REG125_PQ_REG_SET(val, + ctx->sata_param.txeyetuning[lane * 3 + + ctx->sata_param.speed[lane]]); + val = RXTX_REG125_PHZ_MANUAL_SET(val, 0x1); + serdes_wr(ctx, lane, RXTX_REG125, val); + + serdes_rd(ctx, lane, RXTX_REG127, &val); + val = RXTX_REG127_LATCH_MAN_CAL_ENA_SET(val, 0x0); + serdes_wr(ctx, lane, RXTX_REG127, val); + + serdes_rd(ctx, lane, RXTX_REG128, &val); + val = RXTX_REG128_LATCH_CAL_WAIT_SEL_SET(val, 0x3); + serdes_wr(ctx, lane, RXTX_REG128, val); + + serdes_rd(ctx, lane, RXTX_REG145, &val); + val = RXTX_REG145_RXDFE_CONFIG_SET(val, 0x3); + val = RXTX_REG145_TX_IDLE_SATA_SET(val, 0x0); + if (preA3Chip) { + val = RXTX_REG145_RXES_ENA_SET(val, 0x1); + val = RXTX_REG145_RXVWES_LATENA_SET(val, 0x1); + } else { + val = RXTX_REG145_RXES_ENA_SET(val, 0x0); + val = RXTX_REG145_RXVWES_LATENA_SET(val, 0x0); + } + serdes_wr(ctx, lane, RXTX_REG145, val); + + /* + * Set Rx LOS filter clock rate, sample rate, and threshold + * windows + */ + for (i = 0; i < 4; i++) { + reg = RXTX_REG148 + i * 2; + serdes_wr(ctx, lane, reg, 0xFFFF); + } + } +} + +static int xgene_phy_cal_rdy_chk(struct xgene_phy_ctx *ctx, + enum cmu_type_t cmu_type, + enum clk_type_t clk_type) +{ + void __iomem *csr_serdes = ctx->sds_base; + int loop; + u32 val; + + /* Release PHY main reset */ + writel(0xdf, csr_serdes + SATA_ENET_SDS_RST_CTL); + readl(csr_serdes + SATA_ENET_SDS_RST_CTL); /* Force a barrier */ + + if (cmu_type != REF_CMU) { + cmu_setbits(ctx, cmu_type, CMU_REG5, CMU_REG5_PLL_RESETB_MASK); + /* + * As per PHY design spec, the PLL reset requires a minimum + * of 800us. + */ + usleep_range(800, 1000); + + cmu_rd(ctx, cmu_type, CMU_REG1, &val); + val = CMU_REG1_PLL_MANUALCAL_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG1, val); + /* + * As per PHY design spec, the PLL auto calibration requires + * a minimum of 800us. + */ + usleep_range(800, 1000); + + cmu_toggle1to0(ctx, cmu_type, CMU_REG32, + CMU_REG32_FORCE_VCOCAL_START_MASK); + /* + * As per PHY design spec, the PLL requires a minimum of + * 800us to settle. + */ + usleep_range(800, 1000); + } + + if (!preA3Chip) + goto skip_manual_cal; + + /* + * Configure the termination resister calibration + * The serial receive pins, RXP/RXN, have TERMination resistor + * that is required to be calibrated. + */ + cmu_rd(ctx, cmu_type, CMU_REG17, &val); + val = CMU_REG17_PVT_CODE_R2A_SET(val, 0x12); + val = CMU_REG17_RESERVED_7_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG17, val); + cmu_toggle1to0(ctx, cmu_type, CMU_REG17, + CMU_REG17_PVT_TERM_MAN_ENA_MASK); + /* + * The serial transmit pins, TXP/TXN, have Pull-UP and Pull-DOWN + * resistors that are required to the calibrated. + * Configure the pull DOWN calibration + */ + cmu_rd(ctx, cmu_type, CMU_REG17, &val); + val = CMU_REG17_PVT_CODE_R2A_SET(val, 0x29); + val = CMU_REG17_RESERVED_7_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG17, val); + cmu_toggle1to0(ctx, cmu_type, CMU_REG16, + CMU_REG16_PVT_DN_MAN_ENA_MASK); + /* Configure the pull UP calibration */ + cmu_rd(ctx, cmu_type, CMU_REG17, &val); + val = CMU_REG17_PVT_CODE_R2A_SET(val, 0x28); + val = CMU_REG17_RESERVED_7_SET(val, 0x0); + cmu_wr(ctx, cmu_type, CMU_REG17, val); + cmu_toggle1to0(ctx, cmu_type, CMU_REG16, + CMU_REG16_PVT_UP_MAN_ENA_MASK); + +skip_manual_cal: + /* Poll the PLL calibration completion status for at least 1 ms */ + loop = 100; + do { + cmu_rd(ctx, cmu_type, CMU_REG7, &val); + if (CMU_REG7_PLL_CALIB_DONE_RD(val)) + break; + /* + * As per PHY design spec, PLL calibration status requires + * a minimum of 10us to be updated. + */ + usleep_range(10, 100); + } while (--loop > 0); + + cmu_rd(ctx, cmu_type, CMU_REG7, &val); + dev_dbg(ctx->dev, "PLL calibration %s\n", + CMU_REG7_PLL_CALIB_DONE_RD(val) ? "done" : "failed"); + if (CMU_REG7_VCO_CAL_FAIL_RD(val)) { + dev_err(ctx->dev, + "PLL calibration failed due to VCO failure\n"); + return -1; + } + dev_dbg(ctx->dev, "PLL calibration successful\n"); + + cmu_rd(ctx, cmu_type, CMU_REG15, &val); + dev_dbg(ctx->dev, "PHY Tx is %sready\n", val & 0x300 ? "" : "not "); + return 0; +} + +static void xgene_phy_pdwn_force_vco(struct xgene_phy_ctx *ctx, + enum cmu_type_t cmu_type, + enum clk_type_t clk_type) +{ + u32 val; + + dev_dbg(ctx->dev, "Reset VCO and re-start again\n"); + if (cmu_type == PHY_CMU) { + cmu_rd(ctx, cmu_type, CMU_REG16, &val); + val = CMU_REG16_VCOCAL_WAIT_BTW_CODE_SET(val, 0x7); + cmu_wr(ctx, cmu_type, CMU_REG16, val); + } + + cmu_toggle1to0(ctx, cmu_type, CMU_REG0, CMU_REG0_PDOWN_MASK); + cmu_toggle1to0(ctx, cmu_type, CMU_REG32, + CMU_REG32_FORCE_VCOCAL_START_MASK); +} + +static int xgene_phy_hw_init_sata(struct xgene_phy_ctx *ctx, + enum clk_type_t clk_type, int ssc_enable) +{ + void __iomem *sds_base = ctx->sds_base; + u32 val; + int i; + + /* Configure the PHY for operation */ + dev_dbg(ctx->dev, "Reset PHY\n"); + /* Place PHY into reset */ + writel(0x0, sds_base + SATA_ENET_SDS_RST_CTL); + val = readl(sds_base + SATA_ENET_SDS_RST_CTL); /* Force a barrier */ + /* Release PHY lane from reset (active high) */ + writel(0x20, sds_base + SATA_ENET_SDS_RST_CTL); + readl(sds_base + SATA_ENET_SDS_RST_CTL); /* Force a barrier */ + /* Release all PHY module out of reset except PHY main reset */ + writel(0xde, sds_base + SATA_ENET_SDS_RST_CTL); + readl(sds_base + SATA_ENET_SDS_RST_CTL); /* Force a barrier */ + + /* Set the operation speed */ + val = readl(sds_base + SATA_ENET_SDS_CTL1); + val = CFG_I_SPD_SEL_CDR_OVR1_SET(val, + ctx->sata_param.txspeed[ctx->sata_param.speed[0]]); + writel(val, sds_base + SATA_ENET_SDS_CTL1); + + dev_dbg(ctx->dev, "Set the customer pin mode to SATA\n"); + val = readl(sds_base + SATA_ENET_SDS_CTL0); + val = REGSPEC_CFG_I_CUSTOMER_PIN_MODE0_SET(val, 0x4421); + writel(val, sds_base + SATA_ENET_SDS_CTL0); + + /* Configure the clock macro unit (CMU) clock type */ + xgene_phy_cfg_cmu_clk_type(ctx, PHY_CMU, clk_type); + + /* Configure the clock macro */ + xgene_phy_sata_cfg_cmu_core(ctx, PHY_CMU, clk_type); + + /* Enable SSC if enabled */ + if (ssc_enable) + xgene_phy_ssc_enable(ctx, PHY_CMU); + + /* Configure PHY lanes */ + xgene_phy_sata_cfg_lanes(ctx); + + /* Set Rx/Tx 20-bit */ + val = readl(sds_base + SATA_ENET_SDS_PCS_CTL0); + val = REGSPEC_CFG_I_RX_WORDMODE0_SET(val, 0x3); + val = REGSPEC_CFG_I_TX_WORDMODE0_SET(val, 0x3); + writel(val, sds_base + SATA_ENET_SDS_PCS_CTL0); + + /* Start PLL calibration and try for three times */ + i = 10; + do { + if (!xgene_phy_cal_rdy_chk(ctx, PHY_CMU, clk_type)) + break; + /* If failed, toggle the VCO power signal and start again */ + xgene_phy_pdwn_force_vco(ctx, PHY_CMU, clk_type); + } while (--i > 0); + /* Even on failure, allow to continue any way */ + if (i <= 0) + dev_err(ctx->dev, "PLL calibration failed\n"); + + return 0; +} + +static int xgene_phy_hw_initialize(struct xgene_phy_ctx *ctx, + enum clk_type_t clk_type, + int ssc_enable) +{ + int rc; + + dev_dbg(ctx->dev, "PHY init clk type %d\n", clk_type); + + if (ctx->mode == MODE_SATA) { + rc = xgene_phy_hw_init_sata(ctx, clk_type, ssc_enable); + if (rc) + return rc; + } else { + dev_err(ctx->dev, "Un-supported customer pin mode %d\n", + ctx->mode); + return -ENODEV; + } + + return 0; +} + +/* + * Receiver Offset Calibration: + * + * Calibrate the receiver signal path offset in two steps - summar and + * latch calibrations + */ +static void xgene_phy_force_lat_summer_cal(struct xgene_phy_ctx *ctx, int lane) +{ + int i; + struct { + u32 reg; + u32 val; + } serdes_reg[] = { + {RXTX_REG38, 0x0}, + {RXTX_REG39, 0xff00}, + {RXTX_REG40, 0xffff}, + {RXTX_REG41, 0xffff}, + {RXTX_REG42, 0xffff}, + {RXTX_REG43, 0xffff}, + {RXTX_REG44, 0xffff}, + {RXTX_REG45, 0xffff}, + {RXTX_REG46, 0xffff}, + {RXTX_REG47, 0xfffc}, + {RXTX_REG48, 0x0}, + {RXTX_REG49, 0x0}, + {RXTX_REG50, 0x0}, + {RXTX_REG51, 0x0}, + {RXTX_REG52, 0x0}, + {RXTX_REG53, 0x0}, + {RXTX_REG54, 0x0}, + {RXTX_REG55, 0x0}, + }; + + /* Start SUMMER calibration */ + serdes_setbits(ctx, lane, RXTX_REG127, + RXTX_REG127_FORCE_SUM_CAL_START_MASK); + /* + * As per PHY design spec, the Summer calibration requires a minimum + * of 100us to complete. + */ + usleep_range(100, 500); + serdes_clrbits(ctx, lane, RXTX_REG127, + RXTX_REG127_FORCE_SUM_CAL_START_MASK); + /* + * As per PHY design spec, the auto calibration requires a minimum + * of 100us to complete. + */ + usleep_range(100, 500); + + /* Start latch calibration */ + serdes_setbits(ctx, lane, RXTX_REG127, + RXTX_REG127_FORCE_LAT_CAL_START_MASK); + /* + * As per PHY design spec, the latch calibration requires a minimum + * of 100us to complete. + */ + usleep_range(100, 500); + serdes_clrbits(ctx, lane, RXTX_REG127, + RXTX_REG127_FORCE_LAT_CAL_START_MASK); + + /* Configure the PHY lane for calibration */ + serdes_wr(ctx, lane, RXTX_REG28, 0x7); + serdes_wr(ctx, lane, RXTX_REG31, 0x7e00); + serdes_clrbits(ctx, lane, RXTX_REG4, + RXTX_REG4_TX_LOOPBACK_BUF_EN_MASK); + serdes_clrbits(ctx, lane, RXTX_REG7, + RXTX_REG7_LOOP_BACK_ENA_CTLE_MASK); + for (i = 0; i < ARRAY_SIZE(serdes_reg); i++) + serdes_wr(ctx, lane, serdes_reg[i].reg, + serdes_reg[i].val); +} + +static void xgene_phy_reset_rxd(struct xgene_phy_ctx *ctx, int lane) +{ + /* Reset digital Rx */ + serdes_clrbits(ctx, lane, RXTX_REG7, RXTX_REG7_RESETB_RXD_MASK); + /* As per PHY design spec, the reset requires a minimum of 100us. */ + usleep_range(100, 150); + serdes_setbits(ctx, lane, RXTX_REG7, RXTX_REG7_RESETB_RXD_MASK); +} + +static int xgene_phy_get_avg(int accum, int samples) +{ + return (accum + (samples / 2)) / samples; +} + +static void xgene_phy_gen_avg_val(struct xgene_phy_ctx *ctx, int lane) +{ + int max_loop = 10; + int avg_loop = 0; + int lat_do = 0, lat_xo = 0, lat_eo = 0, lat_so = 0; + int lat_de = 0, lat_xe = 0, lat_ee = 0, lat_se = 0; + int sum_cal = 0; + int lat_do_itr, lat_xo_itr, lat_eo_itr, lat_so_itr; + int lat_de_itr, lat_xe_itr, lat_ee_itr, lat_se_itr; + int sum_cal_itr; + int fail_even; + int fail_odd; + u32 val; + + dev_dbg(ctx->dev, "Generating avg calibration value for lane %d\n", + lane); + + /* Enable RX Hi-Z termination */ + serdes_setbits(ctx, lane, RXTX_REG12, + RXTX_REG12_RX_DET_TERM_ENABLE_MASK); + /* Turn off DFE */ + serdes_wr(ctx, lane, RXTX_REG28, 0x0000); + /* DFE Presets to zero */ + serdes_wr(ctx, lane, RXTX_REG31, 0x0000); + + /* + * Receiver Offset Calibration: + * Calibrate the receiver signal path offset in two steps - summar + * and latch calibration. + * Runs the "Receiver Offset Calibration multiple times to determine + * the average value to use. + */ + while (avg_loop < max_loop) { + /* Start the calibration */ + xgene_phy_force_lat_summer_cal(ctx, lane); + + serdes_rd(ctx, lane, RXTX_REG21, &val); + lat_do_itr = RXTX_REG21_DO_LATCH_CALOUT_RD(val); + lat_xo_itr = RXTX_REG21_XO_LATCH_CALOUT_RD(val); + fail_odd = RXTX_REG21_LATCH_CAL_FAIL_ODD_RD(val); + + serdes_rd(ctx, lane, RXTX_REG22, &val); + lat_eo_itr = RXTX_REG22_EO_LATCH_CALOUT_RD(val); + lat_so_itr = RXTX_REG22_SO_LATCH_CALOUT_RD(val); + fail_even = RXTX_REG22_LATCH_CAL_FAIL_EVEN_RD(val); + + serdes_rd(ctx, lane, RXTX_REG23, &val); + lat_de_itr = RXTX_REG23_DE_LATCH_CALOUT_RD(val); + lat_xe_itr = RXTX_REG23_XE_LATCH_CALOUT_RD(val); + + serdes_rd(ctx, lane, RXTX_REG24, &val); + lat_ee_itr = RXTX_REG24_EE_LATCH_CALOUT_RD(val); + lat_se_itr = RXTX_REG24_SE_LATCH_CALOUT_RD(val); + + serdes_rd(ctx, lane, RXTX_REG121, &val); + sum_cal_itr = RXTX_REG121_SUMOS_CAL_CODE_RD(val); + + /* Check for failure. If passed, sum them for averaging */ + if ((fail_even == 0 || fail_even == 1) && + (fail_odd == 0 || fail_odd == 1)) { + lat_do += lat_do_itr; + lat_xo += lat_xo_itr; + lat_eo += lat_eo_itr; + lat_so += lat_so_itr; + lat_de += lat_de_itr; + lat_xe += lat_xe_itr; + lat_ee += lat_ee_itr; + lat_se += lat_se_itr; + sum_cal += sum_cal_itr; + + dev_dbg(ctx->dev, "Iteration %d:\n", avg_loop); + dev_dbg(ctx->dev, "DO 0x%x XO 0x%x EO 0x%x SO 0x%x\n", + lat_do_itr, lat_xo_itr, lat_eo_itr, + lat_so_itr); + dev_dbg(ctx->dev, "DE 0x%x XE 0x%x EE 0x%x SE 0x%x\n", + lat_de_itr, lat_xe_itr, lat_ee_itr, + lat_se_itr); + dev_dbg(ctx->dev, "SUM 0x%x\n", sum_cal_itr); + ++avg_loop; + } else { + dev_err(ctx->dev, + "Receiver calibration failed at %d loop\n", + avg_loop); + } + xgene_phy_reset_rxd(ctx, lane); + } + + /* Update latch manual calibration with average value */ + serdes_rd(ctx, lane, RXTX_REG127, &val); + val = RXTX_REG127_DO_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_do, max_loop)); + val = RXTX_REG127_XO_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_xo, max_loop)); + serdes_wr(ctx, lane, RXTX_REG127, val); + + serdes_rd(ctx, lane, RXTX_REG128, &val); + val = RXTX_REG128_EO_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_eo, max_loop)); + val = RXTX_REG128_SO_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_so, max_loop)); + serdes_wr(ctx, lane, RXTX_REG128, val); + + serdes_rd(ctx, lane, RXTX_REG129, &val); + val = RXTX_REG129_DE_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_de, max_loop)); + val = RXTX_REG129_XE_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_xe, max_loop)); + serdes_wr(ctx, lane, RXTX_REG129, val); + + serdes_rd(ctx, lane, RXTX_REG130, &val); + val = RXTX_REG130_EE_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_ee, max_loop)); + val = RXTX_REG130_SE_LATCH_MANCAL_SET(val, + xgene_phy_get_avg(lat_se, max_loop)); + serdes_wr(ctx, lane, RXTX_REG130, val); + + /* Update SUMMER calibration with average value */ + serdes_rd(ctx, lane, RXTX_REG14, &val); + val = RXTX_REG14_CLTE_LATCAL_MAN_PROG_SET(val, + xgene_phy_get_avg(sum_cal, max_loop)); + serdes_wr(ctx, lane, RXTX_REG14, val); + + dev_dbg(ctx->dev, "Average Value:\n"); + dev_dbg(ctx->dev, "DO 0x%x XO 0x%x EO 0x%x SO 0x%x\n", + xgene_phy_get_avg(lat_do, max_loop), + xgene_phy_get_avg(lat_xo, max_loop), + xgene_phy_get_avg(lat_eo, max_loop), + xgene_phy_get_avg(lat_so, max_loop)); + dev_dbg(ctx->dev, "DE 0x%x XE 0x%x EE 0x%x SE 0x%x\n", + xgene_phy_get_avg(lat_de, max_loop), + xgene_phy_get_avg(lat_xe, max_loop), + xgene_phy_get_avg(lat_ee, max_loop), + xgene_phy_get_avg(lat_se, max_loop)); + dev_dbg(ctx->dev, "SUM 0x%x\n", + xgene_phy_get_avg(sum_cal, max_loop)); + + serdes_rd(ctx, lane, RXTX_REG14, &val); + val = RXTX_REG14_CTLE_LATCAL_MAN_ENA_SET(val, 0x1); + serdes_wr(ctx, lane, RXTX_REG14, val); + dev_dbg(ctx->dev, "Enable Manual Summer calibration\n"); + + serdes_rd(ctx, lane, RXTX_REG127, &val); + val = RXTX_REG127_LATCH_MAN_CAL_ENA_SET(val, 0x1); + dev_dbg(ctx->dev, "Enable Manual Latch calibration\n"); + serdes_wr(ctx, lane, RXTX_REG127, val); + + /* Disable RX Hi-Z termination */ + serdes_rd(ctx, lane, RXTX_REG12, &val); + val = RXTX_REG12_RX_DET_TERM_ENABLE_SET(val, 0); + serdes_wr(ctx, lane, RXTX_REG12, val); + /* Turn on DFE */ + serdes_wr(ctx, lane, RXTX_REG28, 0x0007); + /* Set DFE preset */ + serdes_wr(ctx, lane, RXTX_REG31, 0x7e00); +} + +static int xgene_phy_hw_init(struct phy *phy) +{ + struct xgene_phy_ctx *ctx = phy_get_drvdata(phy); + int rc; + int i; + + rc = xgene_phy_hw_initialize(ctx, CLK_EXT_DIFF, SSC_DISABLE); + if (rc) { + dev_err(ctx->dev, "PHY initialize failed %d\n", rc); + return rc; + } + + /* Setup clock properly after PHY configuration */ + if (!IS_ERR(ctx->clk)) { + /* HW requires an toggle of the clock */ + clk_prepare_enable(ctx->clk); + clk_disable_unprepare(ctx->clk); + clk_prepare_enable(ctx->clk); + } + + /* Compute average value */ + for (i = 0; i < MAX_LANE; i++) + xgene_phy_gen_avg_val(ctx, i); + + dev_dbg(ctx->dev, "PHY initialized\n"); + return 0; +} + +static const struct phy_ops xgene_phy_ops = { + .init = xgene_phy_hw_init, + .owner = THIS_MODULE, +}; + +static struct phy *xgene_phy_xlate(struct device *dev, + struct of_phandle_args *args) +{ + struct xgene_phy_ctx *ctx = dev_get_drvdata(dev); + + if (args->args_count <= 0) + return ERR_PTR(-EINVAL); + if (args->args[0] < MODE_SATA || args->args[0] >= MODE_MAX) + return ERR_PTR(-EINVAL); + + ctx->mode = args->args[0]; + return ctx->phy; +} + +static void xgene_phy_get_param(struct platform_device *pdev, + const char *name, u32 *buffer, + int count, u32 *default_val, + u32 conv_factor) +{ + int i; + + if (!of_property_read_u32_array(pdev->dev.of_node, name, buffer, + count)) { + for (i = 0; i < count; i++) + buffer[i] /= conv_factor; + return; + } + /* Does not exist, load default */ + for (i = 0; i < count; i++) + buffer[i] = default_val[i % 3]; +} + +static int xgene_phy_probe(struct platform_device *pdev) +{ + struct phy_provider *phy_provider; + struct xgene_phy_ctx *ctx; + struct resource *res; + int rc = 0; + u32 default_spd[] = DEFAULT_SATA_SPD_SEL; + u32 default_txboost_gain[] = DEFAULT_SATA_TXBOOST_GAIN; + u32 default_txeye_direction[] = DEFAULT_SATA_TXEYEDIRECTION; + u32 default_txeye_tuning[] = DEFAULT_SATA_TXEYETUNING; + u32 default_txamp[] = DEFAULT_SATA_TXAMP; + u32 default_txcn1[] = DEFAULT_SATA_TXCN1; + u32 default_txcn2[] = DEFAULT_SATA_TXCN2; + u32 default_txcp1[] = DEFAULT_SATA_TXCP1; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + ctx->sds_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(ctx->sds_base)) { + rc = PTR_ERR(ctx->sds_base); + goto error; + } + + /* Retrieve optional clock */ + ctx->clk = clk_get(&pdev->dev, NULL); + + /* Load override paramaters */ + xgene_phy_get_param(pdev, "apm,tx-eye-tuning", + ctx->sata_param.txeyetuning, 6, default_txeye_tuning, 1); + xgene_phy_get_param(pdev, "apm,tx-eye-direction", + ctx->sata_param.txeyedirection, 6, default_txeye_direction, 1); + xgene_phy_get_param(pdev, "apm,tx-boost-gain", + ctx->sata_param.txboostgain, 6, default_txboost_gain, 1); + xgene_phy_get_param(pdev, "apm,tx-amplitude", + ctx->sata_param.txamplitude, 6, default_txamp, 13300); + xgene_phy_get_param(pdev, "apm,tx-pre-cursor1", + ctx->sata_param.txprecursor_cn1, 6, default_txcn1, 18200); + xgene_phy_get_param(pdev, "apm,tx-pre-cursor2", + ctx->sata_param.txprecursor_cn2, 6, default_txcn2, 18200); + xgene_phy_get_param(pdev, "apm,tx-post-cursor", + ctx->sata_param.txpostcursor_cp1, 6, default_txcp1, 18200); + xgene_phy_get_param(pdev, "apm,tx-speed", + ctx->sata_param.txspeed, 3, default_spd, 1); + for (i = 0; i < MAX_LANE; i++) + ctx->sata_param.speed[i] = 2; /* Default to Gen3 */ + + ctx->dev = &pdev->dev; + platform_set_drvdata(pdev, ctx); + + ctx->phy = devm_phy_create(ctx->dev, &xgene_phy_ops, NULL); + if (IS_ERR(ctx->phy)) { + dev_dbg(&pdev->dev, "Failed to create PHY\n"); + rc = PTR_ERR(ctx->phy); + goto error; + } + phy_set_drvdata(ctx->phy, ctx); + + phy_provider = devm_of_phy_provider_register(ctx->dev, + xgene_phy_xlate); + if (IS_ERR(phy_provider)) { + rc = PTR_ERR(phy_provider); + goto error; + } + + return 0; + +error: + return rc; +} + +static const struct of_device_id xgene_phy_of_match[] = { + {.compatible = "apm,xgene-phy",}, + {}, +}; +MODULE_DEVICE_TABLE(of, xgene_phy_of_match); + +static struct platform_driver xgene_phy_driver = { + .probe = xgene_phy_probe, + .driver = { + .name = "xgene-phy", + .owner = THIS_MODULE, + .of_match_table = xgene_phy_of_match, + }, +}; +module_platform_driver(xgene_phy_driver); + +MODULE_DESCRIPTION("APM X-Gene Multi-Purpose PHY driver"); +MODULE_AUTHOR("Loc Ho <lho@apm.com>"); +MODULE_LICENSE("GPL v2"); +MODULE_VERSION("0.1"); |