![Bill Pemberton](/assets/img/avatar_default.png)
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
422 lines
8.2 KiB
C
422 lines
8.2 KiB
C
/*
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* Driver for ADI Direct Digital Synthesis ad9910
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*
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* Copyright (c) 2010 Analog Devices Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/types.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/spi/spi.h>
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#include <linux/slab.h>
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#include <linux/sysfs.h>
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#include <linux/module.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/sysfs.h>
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#define DRV_NAME "ad9910"
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#define CFR1 0x0
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#define CFR2 0x1
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#define CFR3 0x2
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#define AUXDAC 0x3
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#define IOUPD 0x4
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#define FTW 0x7
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#define POW 0x8
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#define ASF 0x9
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#define MULTC 0x0A
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#define DIG_RAMPL 0x0B
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#define DIG_RAMPS 0x0C
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#define DIG_RAMPR 0x0D
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#define SIN_TONEP0 0x0E
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#define SIN_TONEP1 0x0F
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#define SIN_TONEP2 0x10
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#define SIN_TONEP3 0x11
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#define SIN_TONEP4 0x12
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#define SIN_TONEP5 0x13
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#define SIN_TONEP6 0x14
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#define SIN_TONEP7 0x15
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#define RAM_ENABLE (1 << 7)
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#define MANUAL_OSK (1 << 7)
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#define INVSIC (1 << 6)
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#define DDS_SINEOP (1)
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#define AUTO_OSK (1)
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#define OSKEN (1 << 1)
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#define LOAD_ARR (1 << 2)
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#define CLR_PHA (1 << 3)
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#define CLR_DIG (1 << 4)
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#define ACLR_PHA (1 << 5)
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#define ACLR_DIG (1 << 6)
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#define LOAD_LRR (1 << 7)
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#define LSB_FST (1)
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#define SDIO_IPT (1 << 1)
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#define EXT_PWD (1 << 3)
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#define ADAC_PWD (1 << 4)
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#define REFCLK_PWD (1 << 5)
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#define DAC_PWD (1 << 6)
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#define DIG_PWD (1 << 7)
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#define ENA_AMP (1)
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#define READ_FTW (1)
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#define DIGR_LOW (1 << 1)
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#define DIGR_HIGH (1 << 2)
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#define DIGR_ENA (1 << 3)
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#define SYNCCLK_ENA (1 << 6)
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#define ITER_IOUPD (1 << 7)
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#define TX_ENA (1 << 1)
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#define PDCLK_INV (1 << 2)
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#define PDCLK_ENB (1 << 3)
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#define PARA_ENA (1 << 4)
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#define SYNC_DIS (1 << 5)
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#define DATA_ASS (1 << 6)
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#define MATCH_ENA (1 << 7)
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#define PLL_ENA (1)
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#define PFD_RST (1 << 2)
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#define REFCLK_RST (1 << 6)
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#define REFCLK_BYP (1 << 7)
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/* Register format: 1 byte addr + value */
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struct ad9910_config {
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u8 auxdac[5];
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u8 ioupd[5];
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u8 ftw[5];
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u8 pow[3];
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u8 asf[5];
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u8 multc[5];
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u8 dig_rampl[9];
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u8 dig_ramps[9];
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u8 dig_rampr[5];
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u8 sin_tonep0[9];
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u8 sin_tonep1[9];
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u8 sin_tonep2[9];
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u8 sin_tonep3[9];
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u8 sin_tonep4[9];
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u8 sin_tonep5[9];
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u8 sin_tonep6[9];
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u8 sin_tonep7[9];
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};
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struct ad9910_state {
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struct mutex lock;
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struct spi_device *sdev;
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};
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static ssize_t ad9910_set_parameter(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t len)
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{
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struct spi_message msg;
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struct spi_transfer xfer;
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int ret;
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struct ad9910_config *config = (struct ad9910_config *)buf;
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struct iio_dev *idev = dev_to_iio_dev(dev);
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struct ad9910_state *st = iio_priv(idev);
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xfer.len = 5;
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xfer.tx_buf = &config->auxdac[0];
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mutex_lock(&st->lock);
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 5;
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xfer.tx_buf = &config->ioupd[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 5;
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xfer.tx_buf = &config->ftw[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 3;
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xfer.tx_buf = &config->pow[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 5;
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xfer.tx_buf = &config->asf[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 5;
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xfer.tx_buf = &config->multc[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->dig_rampl[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->dig_ramps[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 5;
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xfer.tx_buf = &config->dig_rampr[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep0[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep1[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep2[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep3[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep4[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep5[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep6[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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xfer.len = 9;
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xfer.tx_buf = &config->sin_tonep7[0];
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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error_ret:
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mutex_unlock(&st->lock);
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return ret ? ret : len;
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}
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static IIO_DEVICE_ATTR(dds, S_IWUSR, NULL, ad9910_set_parameter, 0);
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static void ad9910_init(struct ad9910_state *st)
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{
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struct spi_message msg;
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struct spi_transfer xfer;
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int ret;
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u8 cfr[5];
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cfr[0] = CFR1;
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cfr[1] = 0;
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cfr[2] = MANUAL_OSK | INVSIC | DDS_SINEOP;
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cfr[3] = AUTO_OSK | OSKEN | ACLR_PHA | ACLR_DIG | LOAD_LRR;
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cfr[4] = 0;
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mutex_lock(&st->lock);
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xfer.len = 5;
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xfer.tx_buf = 𝔠
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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cfr[0] = CFR2;
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cfr[1] = ENA_AMP;
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cfr[2] = READ_FTW | DIGR_ENA | ITER_IOUPD;
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cfr[3] = TX_ENA | PDCLK_INV | PDCLK_ENB;
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cfr[4] = PARA_ENA;
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xfer.len = 5;
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xfer.tx_buf = 𝔠
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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cfr[0] = CFR3;
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cfr[1] = PLL_ENA;
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cfr[2] = 0;
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cfr[3] = REFCLK_RST | REFCLK_BYP;
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cfr[4] = 0;
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xfer.len = 5;
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xfer.tx_buf = 𝔠
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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ret = spi_sync(st->sdev, &msg);
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if (ret)
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goto error_ret;
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error_ret:
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mutex_unlock(&st->lock);
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}
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static struct attribute *ad9910_attributes[] = {
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&iio_dev_attr_dds.dev_attr.attr,
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NULL,
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};
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static const struct attribute_group ad9910_attribute_group = {
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.attrs = ad9910_attributes,
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};
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static const struct iio_info ad9910_info = {
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.attrs = &ad9910_attribute_group,
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.driver_module = THIS_MODULE,
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};
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static int ad9910_probe(struct spi_device *spi)
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{
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struct ad9910_state *st;
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struct iio_dev *idev;
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int ret = 0;
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idev = iio_device_alloc(sizeof(*st));
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if (idev == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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spi_set_drvdata(spi, idev);
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st = iio_priv(idev);
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mutex_init(&st->lock);
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st->sdev = spi;
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idev->dev.parent = &spi->dev;
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idev->info = &ad9910_info;
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idev->modes = INDIO_DIRECT_MODE;
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ret = iio_device_register(idev);
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if (ret)
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goto error_free_dev;
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spi->max_speed_hz = 2000000;
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spi->mode = SPI_MODE_3;
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spi->bits_per_word = 8;
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spi_setup(spi);
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ad9910_init(st);
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return 0;
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error_free_dev:
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iio_device_free(idev);
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error_ret:
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return ret;
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}
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static int ad9910_remove(struct spi_device *spi)
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{
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iio_device_unregister(spi_get_drvdata(spi));
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iio_device_free(spi_get_drvdata(spi));
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return 0;
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}
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static struct spi_driver ad9910_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = ad9910_probe,
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.remove = ad9910_remove,
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};
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module_spi_driver(ad9910_driver);
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MODULE_AUTHOR("Cliff Cai");
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MODULE_DESCRIPTION("Analog Devices ad9910 driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("spi:" DRV_NAME);
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