diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7606_par.c')
| -rw-r--r-- | drivers/staging/iio/adc/ad7606_par.c | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/staging/iio/adc/ad7606_par.c b/drivers/staging/iio/adc/ad7606_par.c new file mode 100644 index 000000000000..43a554ce753d --- /dev/null +++ b/drivers/staging/iio/adc/ad7606_par.c @@ -0,0 +1,188 @@ +/* + * AD7606 Parallel Interface ADC driver + * + * Copyright 2011 Analog Devices Inc. + * + * Licensed under the GPL-2. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/types.h> +#include <linux/err.h> +#include <linux/io.h> + +#include "ad7606.h" + +static int ad7606_par16_read_block(struct device *dev, + int count, void *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ad7606_state *st = platform_get_drvdata(pdev); + + insw((unsigned long) st->base_address, buf, count); + + return 0; +} + +static const struct ad7606_bus_ops ad7606_par16_bops = { + .read_block = ad7606_par16_read_block, +}; + +static int ad7606_par8_read_block(struct device *dev, + int count, void *buf) +{ + struct platform_device *pdev = to_platform_device(dev); + struct ad7606_state *st = platform_get_drvdata(pdev); + + insb((unsigned long) st->base_address, buf, count * 2); + + return 0; +} + +static const struct ad7606_bus_ops ad7606_par8_bops = { + .read_block = ad7606_par8_read_block, +}; + +static int __devinit ad7606_par_probe(struct platform_device *pdev) +{ + struct resource *res; + struct ad7606_state *st; + void __iomem *addr; + resource_size_t remap_size; + int ret, irq; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq\n"); + return -ENODEV; + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + remap_size = resource_size(res); + + /* Request the regions */ + if (!request_mem_region(res->start, remap_size, "iio-ad7606")) { + ret = -EBUSY; + goto out1; + } + addr = ioremap(res->start, remap_size); + if (!addr) { + ret = -ENOMEM; + goto out1; + } + + st = ad7606_probe(&pdev->dev, irq, addr, + platform_get_device_id(pdev)->driver_data, + remap_size > 1 ? &ad7606_par16_bops : + &ad7606_par8_bops); + + if (IS_ERR(st)) { + ret = PTR_ERR(st); + goto out2; + } + + platform_set_drvdata(pdev, st); + + return 0; + +out2: + iounmap(addr); +out1: + release_mem_region(res->start, remap_size); + + return ret; +} + +static int __devexit ad7606_par_remove(struct platform_device *pdev) +{ + struct ad7606_state *st = platform_get_drvdata(pdev); + struct resource *res; + + ad7606_remove(st); + + iounmap(st->base_address); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + release_mem_region(res->start, resource_size(res)); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +#ifdef CONFIG_PM +static int ad7606_par_suspend(struct device *dev) +{ + struct ad7606_state *st = dev_get_drvdata(dev); + + ad7606_suspend(st); + + return 0; +} + +static int ad7606_par_resume(struct device *dev) +{ + struct ad7606_state *st = dev_get_drvdata(dev); + + ad7606_resume(st); + + return 0; +} + +static const struct dev_pm_ops ad7606_pm_ops = { + .suspend = ad7606_par_suspend, + .resume = ad7606_par_resume, +}; +#define AD7606_PAR_PM_OPS (&ad7606_pm_ops) + +#else +#define AD7606_PAR_PM_OPS NULL +#endif /* CONFIG_PM */ + +static struct platform_device_id ad7606_driver_ids[] = { + { + .name = "ad7606-8", + .driver_data = ID_AD7606_8, + }, { + .name = "ad7606-6", + .driver_data = ID_AD7606_6, + }, { + .name = "ad7606-4", + .driver_data = ID_AD7606_4, + }, + { } +}; + +MODULE_DEVICE_TABLE(platform, ad7606_driver_ids); + +static struct platform_driver ad7606_driver = { + .probe = ad7606_par_probe, + .remove = __devexit_p(ad7606_par_remove), + .id_table = ad7606_driver_ids, + .driver = { + .name = "ad7606", + .owner = THIS_MODULE, + .pm = AD7606_PAR_PM_OPS, + }, +}; + +static int __init ad7606_init(void) +{ + return platform_driver_register(&ad7606_driver); +} + +static void __exit ad7606_cleanup(void) +{ + platform_driver_unregister(&ad7606_driver); +} + +module_init(ad7606_init); +module_exit(ad7606_cleanup); + +MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); +MODULE_DESCRIPTION("Analog Devices AD7606 ADC"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:ad7606_par"); |