--- /dev/null
+/*
+ * AD9523 SPI Low Jitter Clock Generator
+ *
+ * Copyright 2012 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/frequency/ad9523.h>
+
+#define AD9523_READ (1 << 15)
+#define AD9523_WRITE (0 << 15)
+#define AD9523_CNT(x) (((x) - 1) << 13)
+#define AD9523_ADDR(x) ((x) & 0xFFF)
+
+#define AD9523_R1B (1 << 16)
+#define AD9523_R2B (2 << 16)
+#define AD9523_R3B (3 << 16)
+#define AD9523_TRANSF_LEN(x) ((x) >> 16)
+
+#define AD9523_SERIAL_PORT_CONFIG (AD9523_R1B | 0x0)
+#define AD9523_VERSION_REGISTER (AD9523_R1B | 0x2)
+#define AD9523_PART_REGISTER (AD9523_R1B | 0x3)
+#define AD9523_READBACK_CTRL (AD9523_R1B | 0x4)
+
+#define AD9523_EEPROM_CUSTOMER_VERSION_ID (AD9523_R2B | 0x6)
+
+#define AD9523_PLL1_REF_A_DIVIDER (AD9523_R2B | 0x11)
+#define AD9523_PLL1_REF_B_DIVIDER (AD9523_R2B | 0x13)
+#define AD9523_PLL1_REF_TEST_DIVIDER (AD9523_R1B | 0x14)
+#define AD9523_PLL1_FEEDBACK_DIVIDER (AD9523_R2B | 0x17)
+#define AD9523_PLL1_CHARGE_PUMP_CTRL (AD9523_R2B | 0x19)
+#define AD9523_PLL1_INPUT_RECEIVERS_CTRL (AD9523_R1B | 0x1A)
+#define AD9523_PLL1_REF_CTRL (AD9523_R1B | 0x1B)
+#define AD9523_PLL1_MISC_CTRL (AD9523_R1B | 0x1C)
+#define AD9523_PLL1_LOOP_FILTER_CTRL (AD9523_R1B | 0x1D)
+
+#define AD9523_PLL2_CHARGE_PUMP (AD9523_R1B | 0xF0)
+#define AD9523_PLL2_FEEDBACK_DIVIDER_AB (AD9523_R1B | 0xF1)
+#define AD9523_PLL2_CTRL (AD9523_R1B | 0xF2)
+#define AD9523_PLL2_VCO_CTRL (AD9523_R1B | 0xF3)
+#define AD9523_PLL2_VCO_DIVIDER (AD9523_R1B | 0xF4)
+#define AD9523_PLL2_LOOP_FILTER_CTRL (AD9523_R2B | 0xF6)
+#define AD9523_PLL2_R2_DIVIDER (AD9523_R1B | 0xF7)
+
+#define AD9523_CHANNEL_CLOCK_DIST(ch) (AD9523_R3B | (0x192 + 3 * ch))
+
+#define AD9523_PLL1_OUTPUT_CTRL (AD9523_R1B | 0x1BA)
+#define AD9523_PLL1_OUTPUT_CHANNEL_CTRL (AD9523_R1B | 0x1BB)
+
+#define AD9523_READBACK_0 (AD9523_R1B | 0x22C)
+#define AD9523_READBACK_1 (AD9523_R1B | 0x22D)
+
+#define AD9523_STATUS_SIGNALS (AD9523_R3B | 0x232)
+#define AD9523_POWER_DOWN_CTRL (AD9523_R1B | 0x233)
+#define AD9523_IO_UPDATE (AD9523_R1B | 0x234)
+
+#define AD9523_EEPROM_DATA_XFER_STATUS (AD9523_R1B | 0xB00)
+#define AD9523_EEPROM_ERROR_READBACK (AD9523_R1B | 0xB01)
+#define AD9523_EEPROM_CTRL1 (AD9523_R1B | 0xB02)
+#define AD9523_EEPROM_CTRL2 (AD9523_R1B | 0xB03)
+
+/* AD9523_SERIAL_PORT_CONFIG */
+
+#define AD9523_SER_CONF_SDO_ACTIVE (1 << 7)
+#define AD9523_SER_CONF_SOFT_RESET (1 << 5)
+
+/* AD9523_READBACK_CTRL */
+#define AD9523_READBACK_CTRL_READ_BUFFERED (1 << 0)
+
+/* AD9523_PLL1_CHARGE_PUMP_CTRL */
+#define AD9523_PLL1_CHARGE_PUMP_CURRENT_nA(x) (((x) / 500) & 0x7F)
+#define AD9523_PLL1_CHARGE_PUMP_TRISTATE (1 << 7)
+#define AD9523_PLL1_CHARGE_PUMP_MODE_NORMAL (3 << 8)
+#define AD9523_PLL1_CHARGE_PUMP_MODE_PUMP_DOWN (2 << 8)
+#define AD9523_PLL1_CHARGE_PUMP_MODE_PUMP_UP (1 << 8)
+#define AD9523_PLL1_CHARGE_PUMP_MODE_TRISTATE (0 << 8)
+#define AD9523_PLL1_BACKLASH_PW_MIN (0 << 10)
+#define AD9523_PLL1_BACKLASH_PW_LOW (1 << 10)
+#define AD9523_PLL1_BACKLASH_PW_HIGH (2 << 10)
+#define AD9523_PLL1_BACKLASH_PW_MAX (3 << 10)
+
+/* AD9523_PLL1_INPUT_RECEIVERS_CTRL */
+#define AD9523_PLL1_REF_TEST_RCV_EN (1 << 7)
+#define AD9523_PLL1_REFB_DIFF_RCV_EN (1 << 6)
+#define AD9523_PLL1_REFA_DIFF_RCV_EN (1 << 5)
+#define AD9523_PLL1_REFB_RCV_EN (1 << 4)
+#define AD9523_PLL1_REFA_RCV_EN (1 << 3)
+#define AD9523_PLL1_REFA_REFB_PWR_CTRL_EN (1 << 2)
+#define AD9523_PLL1_OSC_IN_CMOS_NEG_INP_EN (1 << 1)
+#define AD9523_PLL1_OSC_IN_DIFF_EN (1 << 0)
+
+/* AD9523_PLL1_REF_CTRL */
+#define AD9523_PLL1_BYPASS_REF_TEST_DIV_EN (1 << 7)
+#define AD9523_PLL1_BYPASS_FEEDBACK_DIV_EN (1 << 6)
+#define AD9523_PLL1_ZERO_DELAY_MODE_INT (1 << 5)
+#define AD9523_PLL1_ZERO_DELAY_MODE_EXT (0 << 5)
+#define AD9523_PLL1_OSC_IN_PLL_FEEDBACK_EN (1 << 4)
+#define AD9523_PLL1_ZD_IN_CMOS_NEG_INP_EN (1 << 3)
+#define AD9523_PLL1_ZD_IN_DIFF_EN (1 << 2)
+#define AD9523_PLL1_REFB_CMOS_NEG_INP_EN (1 << 1)
+#define AD9523_PLL1_REFA_CMOS_NEG_INP_EN (1 << 0)
+
+/* AD9523_PLL1_MISC_CTRL */
+#define AD9523_PLL1_REFB_INDEP_DIV_CTRL_EN (1 << 7)
+#define AD9523_PLL1_OSC_CTRL_FAIL_VCC_BY2_EN (1 << 6)
+#define AD9523_PLL1_REF_MODE(x) ((x) << 2)
+#define AD9523_PLL1_BYPASS_REFB_DIV (1 << 1)
+#define AD9523_PLL1_BYPASS_REFA_DIV (1 << 0)
+
+/* AD9523_PLL1_LOOP_FILTER_CTRL */
+#define AD9523_PLL1_LOOP_FILTER_RZERO(x) ((x) & 0xF)
+
+/* AD9523_PLL2_CHARGE_PUMP */
+#define AD9523_PLL2_CHARGE_PUMP_CURRENT_nA(x) ((x) / 3500)
+
+/* AD9523_PLL2_FEEDBACK_DIVIDER_AB */
+#define AD9523_PLL2_FB_NDIV_A_CNT(x) (((x) & 0x3) << 6)
+#define AD9523_PLL2_FB_NDIV_B_CNT(x) (((x) & 0x3F) << 0)
+#define AD9523_PLL2_FB_NDIV(a, b) (4 * (b) + (a))
+
+/* AD9523_PLL2_CTRL */
+#define AD9523_PLL2_CHARGE_PUMP_MODE_NORMAL (3 << 0)
+#define AD9523_PLL2_CHARGE_PUMP_MODE_PUMP_DOWN (2 << 0)
+#define AD9523_PLL2_CHARGE_PUMP_MODE_PUMP_UP (1 << 0)
+#define AD9523_PLL2_CHARGE_PUMP_MODE_TRISTATE (0 << 0)
+#define AD9523_PLL2_BACKLASH_PW_MIN (0 << 2)
+#define AD9523_PLL2_BACKLASH_PW_LOW (1 << 2)
+#define AD9523_PLL2_BACKLASH_PW_HIGH (2 << 2)
+#define AD9523_PLL2_BACKLASH_PW_MAX (3 << 1)
+#define AD9523_PLL2_BACKLASH_CTRL_EN (1 << 4)
+#define AD9523_PLL2_FREQ_DOUBLER_EN (1 << 5)
+#define AD9523_PLL2_LOCK_DETECT_PWR_DOWN_EN (1 << 7)
+
+/* AD9523_PLL2_VCO_CTRL */
+#define AD9523_PLL2_VCO_CALIBRATE (1 << 1)
+#define AD9523_PLL2_FORCE_VCO_MIDSCALE (1 << 2)
+#define AD9523_PLL2_FORCE_REFERENCE_VALID (1 << 3)
+#define AD9523_PLL2_FORCE_RELEASE_SYNC (1 << 4)
+
+/* AD9523_PLL2_VCO_DIVIDER */
+#define AD9523_PLL2_VCO_DIV_M1(x) ((((x) - 3) & 0x3) << 0)
+#define AD9523_PLL2_VCO_DIV_M2(x) ((((x) - 3) & 0x3) << 4)
+#define AD9523_PLL2_VCO_DIV_M1_PWR_DOWN_EN (1 << 2)
+#define AD9523_PLL2_VCO_DIV_M2_PWR_DOWN_EN (1 << 6)
+
+/* AD9523_PLL2_LOOP_FILTER_CTRL */
+#define AD9523_PLL2_LOOP_FILTER_CPOLE1(x) (((x) & 0x7) << 0)
+#define AD9523_PLL2_LOOP_FILTER_RZERO(x) (((x) & 0x7) << 3)
+#define AD9523_PLL2_LOOP_FILTER_RPOLE2(x) (((x) & 0x7) << 6)
+#define AD9523_PLL2_LOOP_FILTER_RZERO_BYPASS_EN (1 << 8)
+
+/* AD9523_PLL2_R2_DIVIDER */
+#define AD9523_PLL2_R2_DIVIDER_VAL(x) (((x) & 0x1F) << 0)
+
+/* AD9523_CHANNEL_CLOCK_DIST */
+#define AD9523_CLK_DIST_DIV_PHASE(x) (((x) & 0x3F) << 18)
+#define AD9523_CLK_DIST_DIV_PHASE_REV(x) ((ret >> 18) & 0x3F)
+#define AD9523_CLK_DIST_DIV(x) ((((x) - 1) & 0x3FF) << 8)
+#define AD9523_CLK_DIST_DIV_REV(x) (((ret >> 8) & 0x3FF) + 1)
+#define AD9523_CLK_DIST_INV_DIV_OUTPUT_EN (1 << 7)
+#define AD9523_CLK_DIST_IGNORE_SYNC_EN (1 << 6)
+#define AD9523_CLK_DIST_PWR_DOWN_EN (1 << 5)
+#define AD9523_CLK_DIST_LOW_PWR_MODE_EN (1 << 4)
+#define AD9523_CLK_DIST_DRIVER_MODE(x) (((x) & 0xF) << 0)
+
+/* AD9523_PLL1_OUTPUT_CTRL */
+#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH6_M2 (1 << 7)
+#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH5_M2 (1 << 6)
+#define AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH4_M2 (1 << 5)
+#define AD9523_PLL1_OUTP_CTRL_CMOS_DRV_WEAK (1 << 4)
+#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_1 (0 << 0)
+#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_2 (1 << 0)
+#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_4 (2 << 0)
+#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_8 (4 << 0)
+#define AD9523_PLL1_OUTP_CTRL_OUTPUT_DIV_16 (8 << 0)
+
+/* AD9523_PLL1_OUTPUT_CHANNEL_CTRL */
+#define AD9523_PLL1_OUTP_CH_CTRL_OUTPUT_PWR_DOWN_EN (1 << 7)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH9_M2 (1 << 6)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH8_M2 (1 << 5)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH7_M2 (1 << 4)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH3 (1 << 3)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH2 (1 << 2)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH1 (1 << 1)
+#define AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH0 (1 << 0)
+
+/* AD9523_READBACK_0 */
+#define AD9523_READBACK_0_STAT_PLL2_REF_CLK (1 << 7)
+#define AD9523_READBACK_0_STAT_PLL2_FB_CLK (1 << 6)
+#define AD9523_READBACK_0_STAT_VCXO (1 << 5)
+#define AD9523_READBACK_0_STAT_REF_TEST (1 << 4)
+#define AD9523_READBACK_0_STAT_REFB (1 << 3)
+#define AD9523_READBACK_0_STAT_REFA (1 << 2)
+#define AD9523_READBACK_0_STAT_PLL2_LD (1 << 1)
+#define AD9523_READBACK_0_STAT_PLL1_LD (1 << 0)
+
+/* AD9523_READBACK_1 */
+#define AD9523_READBACK_1_HOLDOVER_ACTIVE (1 << 3)
+#define AD9523_READBACK_1_AUTOMODE_SEL_REFB (1 << 2)
+#define AD9523_READBACK_1_VCO_CALIB_IN_PROGRESS (1 << 0)
+
+/* AD9523_STATUS_SIGNALS */
+#define AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL (1 << 16)
+#define AD9523_STATUS_MONITOR_01_PLL12_LOCKED (0x302)
+/* AD9523_POWER_DOWN_CTRL */
+#define AD9523_POWER_DOWN_CTRL_PLL1_PWR_DOWN (1 << 2)
+#define AD9523_POWER_DOWN_CTRL_PLL2_PWR_DOWN (1 << 1)
+#define AD9523_POWER_DOWN_CTRL_DIST_PWR_DOWN (1 << 0)
+
+/* AD9523_IO_UPDATE */
+#define AD9523_IO_UPDATE_EN (1 << 0)
+
+/* AD9523_EEPROM_DATA_XFER_STATUS */
+#define AD9523_EEPROM_DATA_XFER_IN_PROGRESS (1 << 0)
+
+/* AD9523_EEPROM_ERROR_READBACK */
+#define AD9523_EEPROM_ERROR_READBACK_FAIL (1 << 0)
+
+/* AD9523_EEPROM_CTRL1 */
+#define AD9523_EEPROM_CTRL1_SOFT_EEPROM (1 << 1)
+#define AD9523_EEPROM_CTRL1_EEPROM_WRITE_PROT_DIS (1 << 0)
+
+/* AD9523_EEPROM_CTRL2 */
+#define AD9523_EEPROM_CTRL2_REG2EEPROM (1 << 0)
+
+#define AD9523_NUM_CHAN 14
+#define AD9523_NUM_CHAN_ALT_CLK_SRC 10
+
+/* Helpers to avoid excess line breaks */
+#define AD_IFE(_pde, _a, _b) ((pdata->_pde) ? _a : _b)
+#define AD_IF(_pde, _a) AD_IFE(_pde, _a, 0)
+
+enum {
+ AD9523_STAT_PLL1_LD,
+ AD9523_STAT_PLL2_LD,
+ AD9523_STAT_REFA,
+ AD9523_STAT_REFB,
+ AD9523_STAT_REF_TEST,
+ AD9523_STAT_VCXO,
+ AD9523_STAT_PLL2_FB_CLK,
+ AD9523_STAT_PLL2_REF_CLK,
+ AD9523_SYNC,
+ AD9523_EEPROM,
+};
+
+enum {
+ AD9523_VCO1,
+ AD9523_VCO2,
+ AD9523_VCXO,
+ AD9523_NUM_CLK_SRC,
+};
+
+struct ad9523_state {
+ struct spi_device *spi;
+ struct regulator *reg;
+ struct ad9523_platform_data *pdata;
+ struct iio_chan_spec ad9523_channels[AD9523_NUM_CHAN];
+
+ unsigned long vcxo_freq;
+ unsigned long vco_freq;
+ unsigned long vco_out_freq[AD9523_NUM_CLK_SRC];
+ unsigned char vco_out_map[AD9523_NUM_CHAN_ALT_CLK_SRC];
+
+ /*
+ * DMA (thus cache coherency maintenance) requires the
+ * transfer buffers to live in their own cache lines.
+ */
+ union {
+ __be32 d32;
+ u8 d8[4];
+ } data[2] ____cacheline_aligned;
+};
+
+static int ad9523_read(struct iio_dev *indio_dev, unsigned addr)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ struct spi_message m;
+ int ret;
+
+ /* We encode the register size 1..3 bytes into the register address.
+ * On transfer we get the size from the register datum, and make sure
+ * the result is properly aligned.
+ */
+
+ struct spi_transfer t[] = {
+ {
+ .tx_buf = &st->data[0].d8[2],
+ .len = 2,
+ }, {
+ .rx_buf = &st->data[1].d8[4 - AD9523_TRANSF_LEN(addr)],
+ .len = AD9523_TRANSF_LEN(addr),
+ },
+ };
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t[0], &m);
+ spi_message_add_tail(&t[1], &m);
+
+ st->data[0].d32 = cpu_to_be32(AD9523_READ |
+ AD9523_CNT(AD9523_TRANSF_LEN(addr)) |
+ AD9523_ADDR(addr));
+
+ ret = spi_sync(st->spi, &m);
+ if (ret < 0)
+ dev_err(&indio_dev->dev, "read failed (%d)", ret);
+ else
+ ret = be32_to_cpu(st->data[1].d32) & (0xFFFFFF >>
+ (8 * (3 - AD9523_TRANSF_LEN(addr))));
+
+ return ret;
+};
+
+static int ad9523_write(struct iio_dev *indio_dev, unsigned addr, unsigned val)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ struct spi_message m;
+ int ret;
+ struct spi_transfer t[] = {
+ {
+ .tx_buf = &st->data[0].d8[2],
+ .len = 2,
+ }, {
+ .tx_buf = &st->data[1].d8[4 - AD9523_TRANSF_LEN(addr)],
+ .len = AD9523_TRANSF_LEN(addr),
+ },
+ };
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t[0], &m);
+ spi_message_add_tail(&t[1], &m);
+
+ st->data[0].d32 = cpu_to_be32(AD9523_WRITE |
+ AD9523_CNT(AD9523_TRANSF_LEN(addr)) |
+ AD9523_ADDR(addr));
+ st->data[1].d32 = cpu_to_be32(val);
+
+ ret = spi_sync(st->spi, &m);
+
+ if (ret < 0)
+ dev_err(&indio_dev->dev, "write failed (%d)", ret);
+
+ return ret;
+}
+
+static int ad9523_io_update(struct iio_dev *indio_dev)
+{
+ return ad9523_write(indio_dev, AD9523_IO_UPDATE, AD9523_IO_UPDATE_EN);
+}
+
+static int ad9523_vco_out_map(struct iio_dev *indio_dev,
+ unsigned ch, bool out)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ int ret;
+ unsigned mask;
+
+ switch (ch) {
+ case 0 ... 3:
+ ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CHANNEL_CTRL);
+ if (ret < 0)
+ break;
+ mask = AD9523_PLL1_OUTP_CH_CTRL_VCXO_SRC_SEL_CH0 << ch;
+ if (out) {
+ ret |= mask;
+ out = 2;
+ } else {
+ ret &= ~mask;
+ }
+ ret = ad9523_write(indio_dev,
+ AD9523_PLL1_OUTPUT_CHANNEL_CTRL, ret);
+ break;
+ case 4 ... 6:
+ ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CTRL);
+ if (ret < 0)
+ break;
+ mask = AD9523_PLL1_OUTP_CTRL_VCO_DIV_SEL_CH4_M2 << (ch - 4);
+ if (out)
+ ret |= mask;
+ else
+ ret &= ~mask;
+ ret = ad9523_write(indio_dev, AD9523_PLL1_OUTPUT_CTRL, ret);
+ break;
+ case 7 ... 9:
+ ret = ad9523_read(indio_dev, AD9523_PLL1_OUTPUT_CHANNEL_CTRL);
+ if (ret < 0)
+ break;
+ mask = AD9523_PLL1_OUTP_CH_CTRL_VCO_DIV_SEL_CH7_M2 << (ch - 7);
+ if (out)
+ ret |= mask;
+ else
+ ret &= ~mask;
+ ret = ad9523_write(indio_dev,
+ AD9523_PLL1_OUTPUT_CHANNEL_CTRL, ret);
+ break;
+ default:
+ return 0;
+ }
+
+ st->vco_out_map[ch] = out;
+
+ return ret;
+}
+
+static int ad9523_set_clock_provider(struct iio_dev *indio_dev,
+ unsigned ch, unsigned long freq)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ long tmp1, tmp2;
+ bool use_alt_clk_src;
+
+ switch (ch) {
+ case 0 ... 3:
+ use_alt_clk_src = (freq == st->vco_out_freq[AD9523_VCXO]);
+ break;
+ case 4 ... 9:
+ tmp1 = st->vco_out_freq[AD9523_VCO1] / freq;
+ tmp2 = st->vco_out_freq[AD9523_VCO2] / freq;
+ tmp1 *= freq;
+ tmp2 *= freq;
+ use_alt_clk_src = (abs(tmp1 - freq) > abs(tmp2 - freq));
+ break;
+ default:
+ /* Ch 10..14: No action required, return success */
+ return 0;
+ }
+
+ return ad9523_vco_out_map(indio_dev, ch, use_alt_clk_src);
+}
+
+static int ad9523_store_eeprom(struct iio_dev *indio_dev)
+{
+ int ret, tmp;
+
+ ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL1,
+ AD9523_EEPROM_CTRL1_EEPROM_WRITE_PROT_DIS);
+ if (ret < 0)
+ return ret;
+ ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL2,
+ AD9523_EEPROM_CTRL2_REG2EEPROM);
+ if (ret < 0)
+ return ret;
+
+ tmp = 4;
+ do {
+ msleep(16);
+ ret = ad9523_read(indio_dev,
+ AD9523_EEPROM_DATA_XFER_STATUS);
+ if (ret < 0)
+ return ret;
+ } while ((ret & AD9523_EEPROM_DATA_XFER_IN_PROGRESS) && tmp--);
+
+ ret = ad9523_write(indio_dev, AD9523_EEPROM_CTRL1, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_read(indio_dev, AD9523_EEPROM_ERROR_READBACK);
+ if (ret < 0)
+ return ret;
+
+ if (ret & AD9523_EEPROM_ERROR_READBACK_FAIL) {
+ dev_err(&indio_dev->dev, "Verify EEPROM failed");
+ ret = -EIO;
+ }
+
+ return ret;
+}
+
+static int ad9523_sync(struct iio_dev *indio_dev)
+{
+ int ret, tmp;
+
+ ret = ad9523_read(indio_dev, AD9523_STATUS_SIGNALS);
+ if (ret < 0)
+ return ret;
+
+ tmp = ret;
+ tmp |= AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL;
+
+ ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS, tmp);
+ if (ret < 0)
+ return ret;
+
+ ad9523_io_update(indio_dev);
+ tmp &= ~AD9523_STATUS_SIGNALS_SYNC_MAN_CTRL;
+
+ ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS, tmp);
+ if (ret < 0)
+ return ret;
+
+ return ad9523_io_update(indio_dev);
+}
+
+static ssize_t ad9523_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ bool state;
+ int ret;
+
+ ret = strtobool(buf, &state);
+ if (ret < 0)
+ return ret;
+
+ if (!state)
+ return 0;
+
+ mutex_lock(&indio_dev->mlock);
+ switch ((u32)this_attr->address) {
+ case AD9523_SYNC:
+ ret = ad9523_sync(indio_dev);
+ break;
+ case AD9523_EEPROM:
+ ret = ad9523_store_eeprom(indio_dev);
+ break;
+ default:
+ ret = -ENODEV;
+ }
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret ? ret : len;
+}
+
+static ssize_t ad9523_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad9523_read(indio_dev, AD9523_READBACK_0);
+ if (ret >= 0) {
+ ret = sprintf(buf, "%d\n", !!(ret & (1 <<
+ (u32)this_attr->address)));
+ }
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static IIO_DEVICE_ATTR(pll1_locked, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_PLL1_LD);
+
+static IIO_DEVICE_ATTR(pll2_locked, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_PLL2_LD);
+
+static IIO_DEVICE_ATTR(pll1_reference_clk_a_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_REFA);
+
+static IIO_DEVICE_ATTR(pll1_reference_clk_b_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_REFB);
+
+static IIO_DEVICE_ATTR(pll1_reference_clk_test_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_REF_TEST);
+
+static IIO_DEVICE_ATTR(vcxo_clk_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_VCXO);
+
+static IIO_DEVICE_ATTR(pll2_feedback_clk_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_PLL2_FB_CLK);
+
+static IIO_DEVICE_ATTR(pll2_reference_clk_present, S_IRUGO,
+ ad9523_show,
+ NULL,
+ AD9523_STAT_PLL2_REF_CLK);
+
+static IIO_DEVICE_ATTR(sync_dividers, S_IWUSR,
+ NULL,
+ ad9523_store,
+ AD9523_SYNC);
+
+static IIO_DEVICE_ATTR(store_eeprom, S_IWUSR,
+ NULL,
+ ad9523_store,
+ AD9523_EEPROM);
+
+static struct attribute *ad9523_attributes[] = {
+ &iio_dev_attr_sync_dividers.dev_attr.attr,
+ &iio_dev_attr_store_eeprom.dev_attr.attr,
+ &iio_dev_attr_pll2_feedback_clk_present.dev_attr.attr,
+ &iio_dev_attr_pll2_reference_clk_present.dev_attr.attr,
+ &iio_dev_attr_pll1_reference_clk_a_present.dev_attr.attr,
+ &iio_dev_attr_pll1_reference_clk_b_present.dev_attr.attr,
+ &iio_dev_attr_pll1_reference_clk_test_present.dev_attr.attr,
+ &iio_dev_attr_vcxo_clk_present.dev_attr.attr,
+ &iio_dev_attr_pll1_locked.dev_attr.attr,
+ &iio_dev_attr_pll2_locked.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group ad9523_attribute_group = {
+ .attrs = ad9523_attributes,
+};
+
+static int ad9523_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long m)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ unsigned code;
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad9523_read(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel));
+ mutex_unlock(&indio_dev->mlock);
+
+ if (ret < 0)
+ return ret;
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ *val = !(ret & AD9523_CLK_DIST_PWR_DOWN_EN);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_FREQUENCY:
+ *val = st->vco_out_freq[st->vco_out_map[chan->channel]] /
+ AD9523_CLK_DIST_DIV_REV(ret);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_PHASE:
+ code = (AD9523_CLK_DIST_DIV_PHASE_REV(ret) * 3141592) /
+ AD9523_CLK_DIST_DIV_REV(ret);
+ *val = code / 1000000;
+ *val2 = (code % 1000000) * 10;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+};
+
+static int ad9523_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ unsigned reg;
+ int ret, tmp, code;
+
+ mutex_lock(&indio_dev->mlock);
+ ret = ad9523_read(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel));
+ if (ret < 0)
+ goto out;
+
+ reg = ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (val)
+ reg &= ~AD9523_CLK_DIST_PWR_DOWN_EN;
+ else
+ reg |= AD9523_CLK_DIST_PWR_DOWN_EN;
+ break;
+ case IIO_CHAN_INFO_FREQUENCY:
+ if (val <= 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = ad9523_set_clock_provider(indio_dev, chan->channel, val);
+ if (ret < 0)
+ goto out;
+ tmp = st->vco_out_freq[st->vco_out_map[chan->channel]] / val;
+ tmp = clamp(tmp, 1, 1024);
+ reg &= ~(0x3FF << 8);
+ reg |= AD9523_CLK_DIST_DIV(tmp);
+ break;
+ case IIO_CHAN_INFO_PHASE:
+ code = val * 1000000 + val2 % 1000000;
+ tmp = (code * AD9523_CLK_DIST_DIV_REV(ret)) / 3141592;
+ tmp = clamp(tmp, 0, 63);
+ reg &= ~AD9523_CLK_DIST_DIV_PHASE(~0);
+ reg |= AD9523_CLK_DIST_DIV_PHASE(tmp);
+ break;
+ default:
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = ad9523_write(indio_dev, AD9523_CHANNEL_CLOCK_DIST(chan->channel),
+ reg);
+ if (ret < 0)
+ goto out;
+
+ ad9523_io_update(indio_dev);
+out:
+ mutex_unlock(&indio_dev->mlock);
+ return ret;
+}
+
+static int ad9523_reg_access(struct iio_dev *indio_dev,
+ unsigned reg, unsigned writeval,
+ unsigned *readval)
+{
+ int ret;
+
+ mutex_lock(&indio_dev->mlock);
+ if (readval == NULL) {
+ ret = ad9523_write(indio_dev, reg | AD9523_R1B, writeval);
+ ad9523_io_update(indio_dev);
+ } else {
+ ret = ad9523_read(indio_dev, reg | AD9523_R1B);
+ if (ret < 0)
+ return ret;
+ *readval = ret;
+ ret = 0;
+ }
+ mutex_unlock(&indio_dev->mlock);
+
+ return ret;
+}
+
+static const struct iio_info ad9523_info = {
+ .read_raw = &ad9523_read_raw,
+ .write_raw = &ad9523_write_raw,
+ .debugfs_reg_access = &ad9523_reg_access,
+ .attrs = &ad9523_attribute_group,
+ .driver_module = THIS_MODULE,
+};
+
+static int ad9523_setup(struct iio_dev *indio_dev)
+{
+ struct ad9523_state *st = iio_priv(indio_dev);
+ struct ad9523_platform_data *pdata = st->pdata;
+ struct ad9523_channel_spec *chan;
+ unsigned long active_mask = 0;
+ int ret, i;
+
+ ret = ad9523_write(indio_dev, AD9523_SERIAL_PORT_CONFIG,
+ AD9523_SER_CONF_SOFT_RESET |
+ (st->spi->mode & SPI_3WIRE ? 0 :
+ AD9523_SER_CONF_SDO_ACTIVE));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_READBACK_CTRL,
+ AD9523_READBACK_CTRL_READ_BUFFERED);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_io_update(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * PLL1 Setup
+ */
+ ret = ad9523_write(indio_dev, AD9523_PLL1_REF_A_DIVIDER,
+ pdata->refa_r_div);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_REF_B_DIVIDER,
+ pdata->refb_r_div);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_FEEDBACK_DIVIDER,
+ pdata->pll1_feedback_div);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_CHARGE_PUMP_CTRL,
+ AD9523_PLL1_CHARGE_PUMP_CURRENT_nA(pdata->
+ pll1_charge_pump_current_nA) |
+ AD9523_PLL1_CHARGE_PUMP_MODE_NORMAL |
+ AD9523_PLL1_BACKLASH_PW_MIN);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_INPUT_RECEIVERS_CTRL,
+ AD_IF(refa_diff_rcv_en, AD9523_PLL1_REFA_RCV_EN) |
+ AD_IF(refb_diff_rcv_en, AD9523_PLL1_REFB_RCV_EN) |
+ AD_IF(osc_in_diff_en, AD9523_PLL1_OSC_IN_DIFF_EN) |
+ AD_IF(osc_in_cmos_neg_inp_en,
+ AD9523_PLL1_OSC_IN_CMOS_NEG_INP_EN) |
+ AD_IF(refa_diff_rcv_en, AD9523_PLL1_REFA_DIFF_RCV_EN) |
+ AD_IF(refb_diff_rcv_en, AD9523_PLL1_REFB_DIFF_RCV_EN));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_REF_CTRL,
+ AD_IF(zd_in_diff_en, AD9523_PLL1_ZD_IN_DIFF_EN) |
+ AD_IF(zd_in_cmos_neg_inp_en,
+ AD9523_PLL1_ZD_IN_CMOS_NEG_INP_EN) |
+ AD_IF(zero_delay_mode_internal_en,
+ AD9523_PLL1_ZERO_DELAY_MODE_INT) |
+ AD_IF(osc_in_feedback_en, AD9523_PLL1_OSC_IN_PLL_FEEDBACK_EN) |
+ AD_IF(refa_cmos_neg_inp_en, AD9523_PLL1_REFA_CMOS_NEG_INP_EN) |
+ AD_IF(refb_cmos_neg_inp_en, AD9523_PLL1_REFB_CMOS_NEG_INP_EN));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_MISC_CTRL,
+ AD9523_PLL1_REFB_INDEP_DIV_CTRL_EN |
+ AD9523_PLL1_REF_MODE(pdata->ref_mode));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL1_LOOP_FILTER_CTRL,
+ AD9523_PLL1_LOOP_FILTER_RZERO(pdata->pll1_loop_filter_rzero));
+ if (ret < 0)
+ return ret;
+ /*
+ * PLL2 Setup
+ */
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_CHARGE_PUMP,
+ AD9523_PLL2_CHARGE_PUMP_CURRENT_nA(pdata->
+ pll2_charge_pump_current_nA));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_FEEDBACK_DIVIDER_AB,
+ AD9523_PLL2_FB_NDIV_A_CNT(pdata->pll2_ndiv_a_cnt) |
+ AD9523_PLL2_FB_NDIV_B_CNT(pdata->pll2_ndiv_b_cnt));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_CTRL,
+ AD9523_PLL2_CHARGE_PUMP_MODE_NORMAL |
+ AD9523_PLL2_BACKLASH_CTRL_EN |
+ AD_IF(pll2_freq_doubler_en, AD9523_PLL2_FREQ_DOUBLER_EN));
+ if (ret < 0)
+ return ret;
+
+ st->vco_freq = (pdata->vcxo_freq * (pdata->pll2_freq_doubler_en ? 2 : 1)
+ / pdata->pll2_r2_div) * AD9523_PLL2_FB_NDIV(pdata->
+ pll2_ndiv_a_cnt, pdata->pll2_ndiv_b_cnt);
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_VCO_CTRL,
+ AD9523_PLL2_VCO_CALIBRATE);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_VCO_DIVIDER,
+ AD9523_PLL2_VCO_DIV_M1(pdata->pll2_vco_diff_m1) |
+ AD9523_PLL2_VCO_DIV_M2(pdata->pll2_vco_diff_m2) |
+ AD_IFE(pll2_vco_diff_m1, 0,
+ AD9523_PLL2_VCO_DIV_M1_PWR_DOWN_EN) |
+ AD_IFE(pll2_vco_diff_m2, 0,
+ AD9523_PLL2_VCO_DIV_M2_PWR_DOWN_EN));
+ if (ret < 0)
+ return ret;
+
+ if (pdata->pll2_vco_diff_m1)
+ st->vco_out_freq[AD9523_VCO1] =
+ st->vco_freq / pdata->pll2_vco_diff_m1;
+
+ if (pdata->pll2_vco_diff_m2)
+ st->vco_out_freq[AD9523_VCO2] =
+ st->vco_freq / pdata->pll2_vco_diff_m2;
+
+ st->vco_out_freq[AD9523_VCXO] = pdata->vcxo_freq;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_R2_DIVIDER,
+ AD9523_PLL2_R2_DIVIDER_VAL(pdata->pll2_r2_div));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_PLL2_LOOP_FILTER_CTRL,
+ AD9523_PLL2_LOOP_FILTER_CPOLE1(pdata->cpole1) |
+ AD9523_PLL2_LOOP_FILTER_RZERO(pdata->rzero) |
+ AD9523_PLL2_LOOP_FILTER_RPOLE2(pdata->rpole2) |
+ AD_IF(rzero_bypass_en,
+ AD9523_PLL2_LOOP_FILTER_RZERO_BYPASS_EN));
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < pdata->num_channels; i++) {
+ chan = &pdata->channels[i];
+ if (chan->channel_num < AD9523_NUM_CHAN) {
+ __set_bit(chan->channel_num, &active_mask);
+ ret = ad9523_write(indio_dev,
+ AD9523_CHANNEL_CLOCK_DIST(chan->channel_num),
+ AD9523_CLK_DIST_DRIVER_MODE(chan->driver_mode) |
+ AD9523_CLK_DIST_DIV(chan->channel_divider) |
+ AD9523_CLK_DIST_DIV_PHASE(chan->divider_phase) |
+ (chan->sync_ignore_en ?
+ AD9523_CLK_DIST_IGNORE_SYNC_EN : 0) |
+ (chan->divider_output_invert_en ?
+ AD9523_CLK_DIST_INV_DIV_OUTPUT_EN : 0) |
+ (chan->low_power_mode_en ?
+ AD9523_CLK_DIST_LOW_PWR_MODE_EN : 0) |
+ (chan->output_dis ?
+ AD9523_CLK_DIST_PWR_DOWN_EN : 0));
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_vco_out_map(indio_dev, chan->channel_num,
+ chan->use_alt_clock_src);
+ if (ret < 0)
+ return ret;
+
+ st->ad9523_channels[i].type = IIO_ALTVOLTAGE;
+ st->ad9523_channels[i].output = 1;
+ st->ad9523_channels[i].indexed = 1;
+ st->ad9523_channels[i].channel = chan->channel_num;
+ st->ad9523_channels[i].extend_name =
+ chan->extended_name;
+ st->ad9523_channels[i].info_mask =
+ IIO_CHAN_INFO_RAW_SEPARATE_BIT |
+ IIO_CHAN_INFO_PHASE_SEPARATE_BIT |
+ IIO_CHAN_INFO_FREQUENCY_SEPARATE_BIT;
+ }
+ }
+
+ for_each_clear_bit(i, &active_mask, AD9523_NUM_CHAN)
+ ad9523_write(indio_dev,
+ AD9523_CHANNEL_CLOCK_DIST(i),
+ AD9523_CLK_DIST_DRIVER_MODE(TRISTATE) |
+ AD9523_CLK_DIST_PWR_DOWN_EN);
+
+ ret = ad9523_write(indio_dev, AD9523_POWER_DOWN_CTRL, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_write(indio_dev, AD9523_STATUS_SIGNALS,
+ AD9523_STATUS_MONITOR_01_PLL12_LOCKED);
+ if (ret < 0)
+ return ret;
+
+ ret = ad9523_io_update(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int __devinit ad9523_probe(struct spi_device *spi)
+{
+ struct ad9523_platform_data *pdata = spi->dev.platform_data;
+ struct iio_dev *indio_dev;
+ struct ad9523_state *st;
+ int ret;
+
+ if (!pdata) {
+ dev_err(&spi->dev, "no platform data?\n");
+ return -EINVAL;
+ }
+
+ indio_dev = iio_device_alloc(sizeof(*st));
+ if (indio_dev == NULL)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+
+ st->reg = regulator_get(&spi->dev, "vcc");
+ if (!IS_ERR(st->reg)) {
+ ret = regulator_enable(st->reg);
+ if (ret)
+ goto error_put_reg;
+ }
+
+ spi_set_drvdata(spi, indio_dev);
+ st->spi = spi;
+ st->pdata = pdata;
+
+ indio_dev->dev.parent = &spi->dev;
+ indio_dev->name = (pdata->name[0] != 0) ? pdata->name :
+ spi_get_device_id(spi)->name;
+ indio_dev->info = &ad9523_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = st->ad9523_channels;
+ indio_dev->num_channels = pdata->num_channels;
+
+ ret = ad9523_setup(indio_dev);
+ if (ret < 0)
+ goto error_disable_reg;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_disable_reg;
+
+ dev_info(&spi->dev, "probed %s\n", indio_dev->name);
+
+ return 0;
+
+error_disable_reg:
+ if (!IS_ERR(st->reg))
+ regulator_disable(st->reg);
+error_put_reg:
+ if (!IS_ERR(st->reg))
+ regulator_put(st->reg);
+
+ iio_device_free(indio_dev);
+
+ return ret;
+}
+
+static int __devexit ad9523_remove(struct spi_device *spi)
+{
+ struct iio_dev *indio_dev = spi_get_drvdata(spi);
+ struct ad9523_state *st = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ if (!IS_ERR(st->reg)) {
+ regulator_disable(st->reg);
+ regulator_put(st->reg);
+ }
+
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct spi_device_id ad9523_id[] = {
+ {"ad9523-1", 9523},
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad9523_id);
+
+static struct spi_driver ad9523_driver = {
+ .driver = {
+ .name = "ad9523",
+ .owner = THIS_MODULE,
+ },
+ .probe = ad9523_probe,
+ .remove = __devexit_p(ad9523_remove),
+ .id_table = ad9523_id,
+};
+module_spi_driver(ad9523_driver);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Analog Devices AD9523 CLOCKDIST/PLL");
+MODULE_LICENSE("GPL v2");
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff