kernel/include/linux/iio/frequency/ad9523.h

   1 /*
   2  * AD9523 SPI Low Jitter Clock Generator
   3  *
   4  * Copyright 2012 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #ifndef IIO_FREQUENCY_AD9523_H_
  10 #define IIO_FREQUENCY_AD9523_H_
  11
  12 enum outp_drv_mode {
  13         TRISTATE,
  14         LVPECL_8mA,
  15         LVDS_4mA,
  16         LVDS_7mA,
  17         HSTL0_16mA,
  18         HSTL1_8mA,
  19         CMOS_CONF1,
  20         CMOS_CONF2,
  21         CMOS_CONF3,
  22         CMOS_CONF4,
  23         CMOS_CONF5,
  24         CMOS_CONF6,
  25         CMOS_CONF7,
  26         CMOS_CONF8,
  27         CMOS_CONF9
  28 };
  29
  30 enum ref_sel_mode {
  31         NONEREVERTIVE_STAY_ON_REFB,
  32         REVERT_TO_REFA,
  33         SELECT_REFA,
  34         SELECT_REFB,
  35         EXT_REF_SEL
  36 };
  37
  38 /**
  39  * struct ad9523_channel_spec - Output channel configuration
  40  *
  41  * @channel_num: Output channel number.
  42  * @divider_output_invert_en: Invert the polarity of the output clock.
  43  * @sync_ignore_en: Ignore chip-level SYNC signal.
  44  * @low_power_mode_en: Reduce power used in the differential output modes.
  45  * @use_alt_clock_src: Channel divider uses alternative clk source.
  46  * @output_dis: Disables, powers down the entire channel.
  47  * @driver_mode: Output driver mode (logic level family).
  48  * @divider_phase: Divider initial phase after a SYNC. Range 0..63
  49                    LSB = 1/2 of a period of the divider input clock.
  50  * @channel_divider: 10-bit channel divider.
  51  * @extended_name: Optional descriptive channel name.
  52  */
  53
  54 struct ad9523_channel_spec {
  55         unsigned                channel_num;
  56         bool                    divider_output_invert_en;
  57         bool                    sync_ignore_en;
  58         bool                    low_power_mode_en;
  59                                  /* CH0..CH3 VCXO, CH4..CH9 VCO2 */
  60         bool                    use_alt_clock_src;
  61         bool                    output_dis;
  62         enum outp_drv_mode      driver_mode;
  63         unsigned char           divider_phase;
  64         unsigned short          channel_divider;
  65         char                    extended_name[16];
  66 };
  67
  68 enum pll1_rzero_resistor {
  69         RZERO_883_OHM,
  70         RZERO_677_OHM,
  71         RZERO_341_OHM,
  72         RZERO_135_OHM,
  73         RZERO_10_OHM,
  74         RZERO_USE_EXT_RES = 8,
  75 };
  76
  77 enum rpole2_resistor {
  78         RPOLE2_900_OHM,
  79         RPOLE2_450_OHM,
  80         RPOLE2_300_OHM,
  81         RPOLE2_225_OHM,
  82 };
  83
  84 enum rzero_resistor {
  85         RZERO_3250_OHM,
  86         RZERO_2750_OHM,
  87         RZERO_2250_OHM,
  88         RZERO_2100_OHM,
  89         RZERO_3000_OHM,
  90         RZERO_2500_OHM,
  91         RZERO_2000_OHM,
  92         RZERO_1850_OHM,
  93 };
  94
  95 enum cpole1_capacitor {
  96         CPOLE1_0_PF,
  97         CPOLE1_8_PF,
  98         CPOLE1_16_PF,
  99         CPOLE1_24_PF,
 100         _CPOLE1_24_PF, /* place holder */
 101         CPOLE1_32_PF,
 102         CPOLE1_40_PF,
 103         CPOLE1_48_PF,
 104 };
 105
 106 /**
 107  * struct ad9523_platform_data - platform specific information
 108  *
 109  * @vcxo_freq: External VCXO frequency in Hz
 110  * @refa_diff_rcv_en: REFA differential/single-ended input selection.
 111  * @refb_diff_rcv_en: REFB differential/single-ended input selection.
 112  * @zd_in_diff_en: Zero Delay differential/single-ended input selection.
 113  * @osc_in_diff_en: OSC differential/ single-ended input selection.
 114  * @refa_cmos_neg_inp_en: REFA single-ended neg./pos. input enable.
 115  * @refb_cmos_neg_inp_en: REFB single-ended neg./pos. input enable.
 116  * @zd_in_cmos_neg_inp_en: Zero Delay single-ended neg./pos. input enable.
 117  * @osc_in_cmos_neg_inp_en: OSC single-ended neg./pos. input enable.
 118  * @refa_r_div: PLL1 10-bit REFA R divider.
 119  * @refb_r_div: PLL1 10-bit REFB R divider.
 120  * @pll1_feedback_div: PLL1 10-bit Feedback N divider.
 121  * @pll1_charge_pump_current_nA: Magnitude of PLL1 charge pump current (nA).
 122  * @zero_delay_mode_internal_en: Internal, external Zero Delay mode selection.
 123  * @osc_in_feedback_en: PLL1 feedback path, local feedback from
 124  *                      the OSC_IN receiver or zero delay mode
 125  * @pll1_loop_filter_rzero: PLL1 Loop Filter Zero Resistor selection.
 126  * @ref_mode: Reference selection mode.
 127  * @pll2_charge_pump_current_nA: Magnitude of PLL2 charge pump current (nA).
 128  * @pll2_ndiv_a_cnt: PLL2 Feedback N-divider, A Counter, range 0..4.
 129  * @pll2_ndiv_b_cnt: PLL2 Feedback N-divider, B Counter, range 0..63.
 130  * @pll2_freq_doubler_en: PLL2 frequency doubler enable.
 131  * @pll2_r2_div: PLL2 R2 divider, range 0..31.
 132  * @pll2_vco_diff_m1: VCO1 divider, range 3..5.
 133  * @pll2_vco_diff_m2: VCO2 divider, range 3..5.
 134  * @rpole2: PLL2 loop filter Rpole resistor value.
 135  * @rzero: PLL2 loop filter Rzero resistor value.
 136  * @cpole1: PLL2 loop filter Cpole capacitor value.
 137  * @rzero_bypass_en: PLL2 loop filter Rzero bypass enable.
 138  * @num_channels: Array size of struct ad9523_channel_spec.
 139  * @channels: Pointer to channel array.
 140  * @name: Optional alternative iio device name.
 141  */
 142
 143 struct ad9523_platform_data {
 144         unsigned long vcxo_freq;
 145
 146         /* Differential/ Single-Ended Input Configuration */
 147         bool                            refa_diff_rcv_en;
 148         bool                            refb_diff_rcv_en;
 149         bool                            zd_in_diff_en;
 150         bool                            osc_in_diff_en;
 151
 152         /*
 153          * Valid if differential input disabled
 154          * if false defaults to pos input
 155          */
 156         bool                            refa_cmos_neg_inp_en;
 157         bool                            refb_cmos_neg_inp_en;
 158         bool                            zd_in_cmos_neg_inp_en;
 159         bool                            osc_in_cmos_neg_inp_en;
 160
 161         /* PLL1 Setting */
 162         unsigned short                  refa_r_div;
 163         unsigned short                  refb_r_div;
 164         unsigned short                  pll1_feedback_div;
 165         unsigned short                  pll1_charge_pump_current_nA;
 166         bool                            zero_delay_mode_internal_en;
 167         bool                            osc_in_feedback_en;
 168         enum pll1_rzero_resistor        pll1_loop_filter_rzero;
 169
 170         /* Reference */
 171         enum ref_sel_mode               ref_mode;
 172
 173         /* PLL2 Setting */
 174         unsigned int                    pll2_charge_pump_current_nA;
 175         unsigned char                   pll2_ndiv_a_cnt;
 176         unsigned char                   pll2_ndiv_b_cnt;
 177         bool                            pll2_freq_doubler_en;
 178         unsigned char                   pll2_r2_div;
 179         unsigned char                   pll2_vco_diff_m1; /* 3..5 */
 180         unsigned char                   pll2_vco_diff_m2; /* 3..5 */
 181
 182         /* Loop Filter PLL2 */
 183         enum rpole2_resistor            rpole2;
 184         enum rzero_resistor             rzero;
 185         enum cpole1_capacitor           cpole1;
 186         bool                            rzero_bypass_en;
 187
 188         /* Output Channel Configuration */
 189         int                             num_channels;
 190         struct ad9523_channel_spec      *channels;
 191
 192         char                            name[SPI_NAME_SIZE];
 193 };
 194
 195 #endif /* IIO_FREQUENCY_AD9523_H_ */