The control module provides options to set various signal integrity parameters like the output impedance, slew rate, load capacitance for different pad groups. Configure these as required for the omap5430 sevm board.
Signed-off-by: R Sricharan r.sricharan@ti.com --- arch/arm/cpu/armv7/omap5/hwinit.c | 83 +++++++++++++++++++++ arch/arm/include/asm/arch-omap5/omap.h | 128 ++++++++++++++++++++++++++------ 2 files changed, 187 insertions(+), 24 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap5/hwinit.c b/arch/arm/cpu/armv7/omap5/hwinit.c index fa8e390..d024ab5 100644 --- a/arch/arm/cpu/armv7/omap5/hwinit.c +++ b/arch/arm/cpu/armv7/omap5/hwinit.c @@ -57,6 +57,89 @@ const struct gpio_bank *const omap_gpio_bank = gpio_bank_54xx; */ void do_io_settings(void) { + u32 io_settings = 0, mask = 0; + struct omap5_sys_ctrl_regs *ioregs_base = + (struct omap5_sys_ctrl_regs *) OMAP5_IOREGS_BASE; + + /* Impedance settings EMMC, C2C 1,2, hsi2 */ + mask = (ds_mask << 2) | (ds_mask << 8) | + (ds_mask << 16) | (ds_mask << 18); + io_settings = readl(&(ioregs_base->control_smart1io_padconf_0)) & + (~mask); + io_settings |= (ds_60_ohm << 8) | (ds_45_ohm << 16) | + (ds_45_ohm << 18) | (ds_60_ohm << 2); + writel(io_settings, &(ioregs_base->control_smart1io_padconf_0)); + + /* Impedance settings Mcspi2 */ + mask = (ds_mask << 30); + io_settings = readl(&(ioregs_base->control_smart1io_padconf_1)) & + (~mask); + io_settings |= (ds_60_ohm << 30); + writel(io_settings, &(ioregs_base->control_smart1io_padconf_1)); + + /* Impedance settings C2C 3,4 */ + mask = (ds_mask << 14) | (ds_mask << 16); + io_settings = readl(&(ioregs_base->control_smart1io_padconf_2)) & + (~mask); + io_settings |= (ds_45_ohm << 14) | (ds_45_ohm << 16); + writel(io_settings, &(ioregs_base->control_smart1io_padconf_2)); + + /* Slew rate settings EMMC, C2C 1,2 */ + mask = (sc_mask << 8) | (sc_mask << 16) | (sc_mask << 18); + io_settings = readl(&(ioregs_base->control_smart2io_padconf_0)) & + (~mask); + io_settings |= (sc_fast << 8) | (sc_na << 16) | (sc_na << 18); + writel(io_settings, &(ioregs_base->control_smart2io_padconf_0)); + + /* Slew rate settings hsi2, Mcspi2 */ + mask = (sc_mask << 24) | (sc_mask << 28); + io_settings = readl(&(ioregs_base->control_smart2io_padconf_1)) & + (~mask); + io_settings |= (sc_fast << 28) | (sc_fast << 24); + writel(io_settings, &(ioregs_base->control_smart2io_padconf_1)); + + /* Slew rate settings C2C 3,4 */ + mask = (sc_mask << 16) | (sc_mask << 18); + io_settings = readl(&(ioregs_base->control_smart2io_padconf_2)) & + (~mask); + io_settings |= (sc_na << 16) | (sc_na << 18); + writel(io_settings, &(ioregs_base->control_smart2io_padconf_2)); + + /* impedance and slew rate settings for usb */ + mask = (usb_i_mask << 29) | (usb_i_mask << 26) | (usb_i_mask << 23) | + (usb_i_mask << 20) | (usb_i_mask << 17) | (usb_i_mask << 14); + io_settings = readl(&(ioregs_base->control_smart3io_padconf_1)) & + (~mask); + io_settings |= (ds_60_ohm << 29) | (ds_60_ohm << 26) | + (ds_60_ohm << 23) | (sc_fast << 20) | + (sc_fast << 17) | (sc_fast << 14); + writel(io_settings, &(ioregs_base->control_smart3io_padconf_1)); + + /* LPDDR2 io settings */ + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_DQ_NO_PULL_DQS_PULL_DOWN, + &(ioregs_base->control_ddrch1_0)); + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_DQ_NO_PULL_DQS_PULL_DOWN, + &(ioregs_base->control_ddrch1_1)); + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_DQ_NO_PULL_DQS_PULL_DOWN, + &(ioregs_base->control_ddrch2_0)); + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_DQ_NO_PULL_DQS_PULL_DOWN, + &(ioregs_base->control_ddrch2_1)); + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_CK_CKE_NCS_CA_PULL_DOWN, + &(ioregs_base->control_lpddr2ch1_0)); + writel(DDR_IO_I_34OHM_SR_FASTEST_WD_CK_CKE_NCS_CA_PULL_DOWN, + &(ioregs_base->control_lpddr2ch1_1)); + writel(DDR_IO_0_DDR2_DQ_INT_EN_ALL_DDR3_CA_DIS_ALL, + &(ioregs_base->control_ddrio_0)); + writel(DDR_IO_1_DQ_OUT_EN_ALL_DQ_INT_EN_ALL, + &(ioregs_base->control_ddrio_1)); + writel(DDR_IO_2_CA_OUT_EN_ALL_CA_INT_EN_ALL, + &(ioregs_base->control_ddrio_2)); + + /* Efuse settings */ + writel(EFUSE_1, &(ioregs_base->control_efuse_1)); + writel(EFUSE_2, &(ioregs_base->control_efuse_2)); + writel(EFUSE_3, &(ioregs_base->control_efuse_3)); + writel(EFUSE_4, &(ioregs_base->control_efuse_4)); } #endif
diff --git a/arch/arm/include/asm/arch-omap5/omap.h b/arch/arm/include/asm/arch-omap5/omap.h index d811d6e..07546c9 100644 --- a/arch/arm/include/asm/arch-omap5/omap.h +++ b/arch/arm/include/asm/arch-omap5/omap.h @@ -136,32 +136,112 @@ struct s32ktimer { unsigned int s32k_cr; /* 0x10 */ };
-struct omap4_sys_ctrl_regs { - unsigned int pad1[129]; - unsigned int control_id_code; /* 0x4A002204 */ - unsigned int pad11[22]; - unsigned int control_std_fuse_opp_bgap; /* 0x4a002260 */ - unsigned int pad2[47]; - unsigned int control_ldosram_iva_voltage_ctrl; /* 0x4A002320 */ - unsigned int control_ldosram_mpu_voltage_ctrl; /* 0x4A002324 */ - unsigned int control_ldosram_core_voltage_ctrl; /* 0x4A002328 */ - unsigned int pad3[260277]; - unsigned int control_pbiaslite; /* 0x4A100600 */ - unsigned int pad4[63]; - unsigned int control_efuse_1; /* 0x4A100700 */ - unsigned int control_efuse_2; /* 0x4A100704 */ +#define OMAP5_IOREGS_BASE 0x4A002DA0 + +struct omap5_sys_ctrl_regs { + u32 control_paconf_global; /* 0x4A002DA0 */ + u32 control_paconf_mode; /* 0x4A002DA4 */ + u32 control_smart1io_padconf_0; /* 0x4A002DA8 */ + u32 control_smart1io_padconf_1; /* 0x4A002DAC */ + u32 control_smart1io_padconf_2; /* 0x4A002DB0 */ + u32 control_smart2io_padconf_0; /* 0x4A002DB4 */ + u32 control_smart2io_padconf_1; /* 0x4A002DB8 */ + u32 control_smart2io_padconf_2; /* 0x4A002DBC */ + u32 control_smart3io_padconf_0; /* 0x4A002DC0 */ + u32 control_smart3io_padconf_1; /* 0x4A002DC4 */ + u32 pad1[14]; + u32 control_pbias; /* 0x4A002E00 */ + u32 control_i2c_0; /* 0x4A002E04 */ + u32 control_camera_rx; /* 0x4A002E08 */ + u32 control_hdmi_tx_phy; /* 0x4A002E0C */ + u32 control_uniportm; /* 0x4A002E10 */ + u32 control_dsiphy; /* 0x4A002E14 */ + u32 control_mcbsplp; /* 0x4A002E18 */ + u32 control_usb2phycore; /* 0x4A002E1C */ + u32 control_hdmi_1; /*0x4A002E20*/ + u32 control_hsi; /*0x4A002E24*/ + u32 pad2[2]; + u32 control_ddr3ch1_0; /*0x4A002E30*/ + u32 control_ddr3ch2_0; /*0x4A002E34*/ + u32 control_ddrch1_0; /*0x4A002E38*/ + u32 control_ddrch1_1; /*0x4A002E3C*/ + u32 control_ddrch2_0; /*0x4A002E40*/ + u32 control_ddrch2_1; /*0x4A002E44*/ + u32 control_lpddr2ch1_0; /*0x4A002E48*/ + u32 control_lpddr2ch1_1; /*0x4A002E4C*/ + u32 control_ddrio_0; /*0x4A002E50*/ + u32 control_ddrio_1; /*0x4A002E54*/ + u32 control_ddrio_2; /*0x4A002E58*/ + u32 control_hyst_1; /*0x4A002E5C*/ + u32 control_usbb_hsic_control; /*0x4A002E60*/ + u32 control_c2c; /*0x4A002E64*/ + u32 control_core_control_spare_rw; /*0x4A002E68*/ + u32 control_core_control_spare_r; /*0x4A002E6C*/ + u32 control_core_control_spare_r_c0; /*0x4A002E70*/ + u32 control_srcomp_north_side; /*0x4A002E74*/ + u32 control_srcomp_south_side; /*0x4A002E78*/ + u32 control_srcomp_east_side; /*0x4A002E7C*/ + u32 control_srcomp_west_side; /*0x4A002E80*/ + u32 control_srcomp_code_latch; /*0x4A002E84*/ + u32 pad3[3680198]; + u32 control_smart1nopmio_padconf_0; /* 0x4AE0CDA0 */ + u32 control_smart1nopmio_padconf_1; /* 0x4AE0CDA4 */ + u32 control_padconf_mode; /* 0x4AE0CDA8 */ + u32 control_xtal_oscillator; /* 0x4AE0CDAC */ + u32 control_i2c_2; /* 0x4AE0CDB0 */ + u32 control_ckobuffer; /* 0x4AE0CDB4 */ + u32 control_wkup_control_spare_rw; /* 0x4AE0CDB8 */ + u32 control_wkup_control_spare_r; /* 0x4AE0CDBC */ + u32 control_wkup_control_spare_r_c0; /* 0x4AE0CDC0 */ + u32 control_srcomp_east_side_wkup; /* 0x4AE0CDC4 */ + u32 control_efuse_1; /* 0x4AE0CDC8 */ + u32 control_efuse_2; /* 0x4AE0CDCC */ + u32 control_efuse_3; /* 0x4AE0CDD0 */ + u32 control_efuse_4; /* 0x4AE0CDD4 */ + u32 control_efuse_5; /* 0x4AE0CDD8 */ + u32 control_efuse_6; /* 0x4AE0CDDC */ + u32 control_efuse_7; /* 0x4AE0CDE0 */ + u32 control_efuse_8; /* 0x4AE0CDE4 */ + u32 control_efuse_9; /* 0x4AE0CDE8 */ + u32 control_efuse_10; /* 0x4AE0CDEC */ + u32 control_efuse_11; /* 0x4AE0CDF0 */ + u32 control_efuse_12; /* 0x4AE0CDF4 */ + u32 control_efuse_13; /* 0x4AE0CDF8 */ };
-struct control_lpddr2io_regs { - unsigned int control_lpddr2io1_0; - unsigned int control_lpddr2io1_1; - unsigned int control_lpddr2io1_2; - unsigned int control_lpddr2io1_3; - unsigned int control_lpddr2io2_0; - unsigned int control_lpddr2io2_1; - unsigned int control_lpddr2io2_2; - unsigned int control_lpddr2io2_3; -}; +/* Output impedance control */ +#define ds_120_ohm 0x0 +#define ds_60_ohm 0x1 +#define ds_45_ohm 0x2 +#define ds_30_ohm 0x3 +#define ds_mask 0x3 + +/* Slew rate control */ +#define sc_slow 0x0 +#define sc_medium 0x1 +#define sc_fast 0x2 +#define sc_na 0x3 +#define sc_mask 0x3 + +/* Target capacitance control */ +#define lb_5_12_pf 0x0 +#define lb_12_25_pf 0x1 +#define lb_25_50_pf 0x2 +#define lb_50_80_pf 0x3 +#define lb_mask 0x3 + +#define usb_i_mask 0x7 + +#define DDR_IO_I_34OHM_SR_FASTEST_WD_DQ_NO_PULL_DQS_PULL_DOWN 0x80828082 +#define DDR_IO_I_34OHM_SR_FASTEST_WD_CK_CKE_NCS_CA_PULL_DOWN 0x82828200 +#define DDR_IO_0_DDR2_DQ_INT_EN_ALL_DDR3_CA_DIS_ALL 0x8421 +#define DDR_IO_1_DQ_OUT_EN_ALL_DQ_INT_EN_ALL 0x8421084 +#define DDR_IO_2_CA_OUT_EN_ALL_CA_INT_EN_ALL 0x8421000 + +#define EFUSE_1 0x45145100 +#define EFUSE_2 0x45145100 +#define EFUSE_3 0x45145100 +#define EFUSE_4 0x45145100 #endif /* __ASSEMBLY__ */
/*