summaryrefslogtreecommitdiffstats
path: root/target/linux/at91/files/drivers
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/at91/files/drivers')
-rw-r--r--target/linux/at91/files/drivers/misc/at91-adc.c355
-rw-r--r--target/linux/at91/files/drivers/misc/at91_adc.h62
2 files changed, 0 insertions, 417 deletions
diff --git a/target/linux/at91/files/drivers/misc/at91-adc.c b/target/linux/at91/files/drivers/misc/at91-adc.c
deleted file mode 100644
index 90ea8181b..000000000
--- a/target/linux/at91/files/drivers/misc/at91-adc.c
+++ /dev/null
@@ -1,355 +0,0 @@
-/*
- * Driver for ADC on Atmel AT91 SoC Family
- *
- * Copyright (C) 2010 Claudio Mignanti - c.mignanti@gmail.com
- * Based on http://www.at91.com/forum/viewtopic.php/p,9409/#p9409
- *
- * Copyright (C) 2010 Stefano Barbato - stefano@codesink.org
- *
- * 2010/05/18 Antonio Galea
- * Sysfs device model, different drivers integration
- *
- * WISHLIST:
- * - concurrent access control
- * - add support for dynamic reconfiguration
- * - hardware triggers
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.
- *
- * ---------------------------------------------------------------------------
-*/
-
-#include <linux/cdev.h>
-#include <linux/clk.h>
-#include <linux/fs.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/kernel.h>
-#include <linux/smp_lock.h>
-
-#include <asm/io.h>
-
-#include "at91_adc.h"
-
-#define DRV_CLASS "at91_adc"
-
-#define ADC_REQUEST 1 //un-used atm
-#define ADC_READ 2
-#define ADC_FREE 3
-
-/* Device functions */
-#define at91_adc_read(reg) ioread32(at91_adc_base + (reg))
-#define at91_adc_write(reg, val) iowrite32((val), at91_adc_base + (reg))
-#define AT91_DEFAULT_CONFIG AT91_ADC_SHTIM | \
- AT91_ADC_STARTUP | \
- AT91_ADC_PRESCAL | \
- AT91_ADC_SLEEP
-
-static void at91_adc_device_release(struct device *dev) {}
-
-struct platform_device at91_adc_device = {
- .name = "at91_adc",
- .id = -1,
- .dev.release = at91_adc_device_release,
-};
-
-struct clk *at91_adc_clk;
-void __iomem *at91_adc_base;
-void __iomem *at91_pioc_base;
-static struct cdev *at91_adc_cdev = NULL;
-static dev_t at91_adc_devno = 0;
-static struct class *at91_adc_class = NULL;
-
-static int at91_adc_read_chan(int chan){
- int val, sr;
-
- if(chan<0 || chan>3){
- return -EINVAL;
- }
- /* disable pull-up resistor */
- iowrite32(1 << chan, at91_pioc_base + 0x60);
-
- at91_adc_write(AT91_ADC_CHER,AT91_ADC_CH(chan)); // Enable Channel
- at91_adc_write(AT91_ADC_CR,AT91_ADC_START); //Start the ADC
-
- for(sr=0; !(sr & AT91_ADC_EOC(chan)); sr=at91_adc_read(AT91_ADC_SR))
- cpu_relax();
-
- val=at91_adc_read(AT91_ADC_CHR(chan)) & AT91_ADC_DATA; //Read up to 10 bits
-
- return val;
-}
-
-/* PC0 -> AD0
- PC1 -> AD1
- PC2 -> AD2
- PC3 -> AD3 */
-static int mux_chan (int chan, int operation) {
-
- int pin_chan;
-
- if(chan<0 || chan>3){
- return -EINVAL;
- }
-
- switch (chan) {
- case 0:
- pin_chan=AT91_PIN_PC0;
- break;
- case 1:
- pin_chan=AT91_PIN_PC1;
- break;
- case 2:
- pin_chan=AT91_PIN_PC2;
- break;
- case 3:
- pin_chan=AT91_PIN_PC3;
- break;
- default:
- return -EINVAL;
- }
-
- if (operation == 1) //request_chan
- at91_set_A_periph(pin_chan, 0); //Mux PIN to GPIO
- else //free_chan
- at91_set_B_periph(pin_chan, 0); //Mux PIN to GPIO
-
- return 0;
-}
-
-static int at91_adc_config(int requested_config){
- int actual_config;
-
- at91_adc_write(AT91_ADC_CR,AT91_ADC_SWRST); //Reset the ADC
- at91_adc_write(AT91_ADC_MR,requested_config); //Mode setup
- actual_config = at91_adc_read(AT91_ADC_MR); //Read it back
-
- return (requested_config==actual_config? 0: -EINVAL);
-}
-
-/* Sysfs interface */
-static ssize_t at91_adc_chanX_show(
- struct device *dev, struct device_attribute *attr, char *buf ){
-
- ssize_t status = 0;
- int chan = -1;
- int value;
-
- if(strlen(attr->attr.name)==5 && strncmp(attr->attr.name,"chan",4)==0){
- chan = attr->attr.name[4]-'0';
- }
-
- if(chan<0 || chan>3){
- return -EIO;
- }
-
- value = at91_adc_read_chan(chan);
- status = sprintf(buf, "%d\n", value);
-
- return status;
-}
-
-static DEVICE_ATTR(chan0, 0444, at91_adc_chanX_show, NULL);
-static DEVICE_ATTR(chan1, 0444, at91_adc_chanX_show, NULL);
-static DEVICE_ATTR(chan2, 0444, at91_adc_chanX_show, NULL);
-static DEVICE_ATTR(chan3, 0444, at91_adc_chanX_show, NULL);
-
-static const struct attribute *at91_adc_dev_attrs[] = {
- &dev_attr_chan0.attr,
- &dev_attr_chan1.attr,
- &dev_attr_chan2.attr,
- &dev_attr_chan3.attr,
- NULL,
-};
-
-static const struct attribute_group at91_adc_dev_attr_group = {
- .attrs = (struct attribute **) at91_adc_dev_attrs,
-};
-
-/* IOCTL interface */
-#ifdef HAVE_UNLOCKED_IOCTL
-static long at91_adc_unlocked_ioctl(
- struct file *file, unsigned int cmd, unsigned long arg){
-#else
-static int at91_adc_ioctl(
- struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg){
-#endif
-
- long retval = 0;
-
-#ifdef HAVE_UNLOCKED_IOCTL
- lock_kernel();
-#endif
-
- switch (cmd) {
- case ADC_REQUEST:
- retval = mux_chan ((int)arg, 1);
- break;
-
- case ADC_READ:
- retval = at91_adc_read_chan((int)arg);
- break;
-
- case ADC_FREE:
- retval = mux_chan ((int)arg, 0);
- break;
-
- default:
- retval = -EINVAL;
- }
-
-#ifdef HAVE_UNLOCKED_IOCTL
- unlock_kernel();
-#endif
-
- return retval;
-}
-
-struct file_operations at91_adc_fops = {
- .owner = THIS_MODULE,
-#ifdef HAVE_UNLOCKED_IOCTL
- .unlocked_ioctl = at91_adc_unlocked_ioctl,
-#else
- .ioctl = at91_adc_ioctl,
-#endif
-};
-
-static void at91_adc_cdev_teardown(void){
- if(at91_adc_class){
- device_destroy(at91_adc_class, at91_adc_devno);
- class_destroy(at91_adc_class);
- }
-
- if(at91_adc_devno){
- unregister_chrdev_region(at91_adc_devno,1);
- if(at91_adc_cdev){ cdev_del(at91_adc_cdev); }
- }
-
- at91_adc_devno = 0;
- at91_adc_cdev = NULL;
- at91_adc_class = NULL;
- return;
-}
-
-static int at91_adc_cdev_setup(void){
-
- int status;
- /* alloc a new device number (major: dynamic, minor: 0) */
- status = alloc_chrdev_region(&at91_adc_devno,0,1,at91_adc_device.name);
-
- if(status){
- goto err;
- }
-
- /* create a new char device */
- at91_adc_cdev = cdev_alloc();
- if(at91_adc_cdev == NULL){ status=-ENOMEM; goto err; }
- at91_adc_cdev->owner = THIS_MODULE;
- at91_adc_cdev->ops = &at91_adc_fops;
- status = cdev_add(at91_adc_cdev,at91_adc_devno,1);
- if(status){
- goto err;
- }
-
- /* register the class */
- at91_adc_class = class_create(THIS_MODULE, DRV_CLASS);
- if(IS_ERR(at91_adc_class)){ status=-EFAULT; goto err; }
- device_create(at91_adc_class, NULL, at91_adc_devno, NULL, at91_adc_device.name);
- printk(KERN_INFO "Major: %u; minor: %u\n", \
- MAJOR(at91_adc_devno), MINOR(at91_adc_devno) \
- );
-
- return 0;
-
-err:
- at91_adc_cdev_teardown();
- return status;
-}
-
-/* Module init/exit */
-static int __init at91_adc_init(void){
-
- int status;
-
- at91_adc_clk = clk_get(NULL,"adc_clk");
- clk_enable(at91_adc_clk);
-
- at91_adc_base = ioremap(AT91SAM9260_BASE_ADC,SZ_256);
- if(!at91_adc_base){
- status=-ENODEV;
- goto fail_no_iomem_adc;
- }
-
- at91_pioc_base = ioremap(AT91_BASE_SYS + AT91_PIOC,SZ_512);
- if(!at91_pioc_base){
- status=-ENODEV;
- goto fail_no_iomem_pioc;
- }
-
- status = platform_device_register(&at91_adc_device);
- if(status){
- goto fail_no_dev;
- }
-
- status = at91_adc_config(AT91_DEFAULT_CONFIG);
- if(status){
- goto fail_no_config;
- }
-
- status = sysfs_create_group(
- &(at91_adc_device.dev.kobj), &at91_adc_dev_attr_group
- );
-
- if(status){
- goto fail_no_sysfs;
- }
-
- status = at91_adc_cdev_setup();
- if(status){
- goto fail_no_cdev;
- }
-
- printk(KERN_INFO "Registered device at91_adc.\n");
- return 0;
-
-fail_no_cdev:
-fail_no_sysfs:
- // nothing to undo
-fail_no_config:
- platform_device_unregister(&at91_adc_device);
-fail_no_dev:
- iounmap(at91_adc_base);
-fail_no_iomem_pioc:
- iounmap(at91_pioc_base);
-fail_no_iomem_adc:
- clk_disable(at91_adc_clk);
- clk_put(at91_adc_clk);
- return status;
-}
-
-static void __exit at91_adc_exit(void){
-
- at91_adc_cdev_teardown();
- platform_device_unregister(&at91_adc_device);
- iounmap(at91_adc_base);
- iounmap(at91_pioc_base);
-
- clk_disable(at91_adc_clk);
- clk_put(at91_adc_clk);
-
- printk(KERN_INFO "Unregistered device at91_adc.\n");
-}
-
-module_init(at91_adc_init);
-module_exit(at91_adc_exit);
-
-MODULE_AUTHOR("Paul Kavan");
-MODULE_AUTHOR("Claudio Mignanti");
-MODULE_AUTHOR("Antonio Galea");
-MODULE_AUTHOR("Stefano Barbato");
-MODULE_DESCRIPTION("ADC Driver for the AT91SAM9G20");
-MODULE_LICENSE("GPL");
diff --git a/target/linux/at91/files/drivers/misc/at91_adc.h b/target/linux/at91/files/drivers/misc/at91_adc.h
deleted file mode 100644
index 2d6f01d84..000000000
--- a/target/linux/at91/files/drivers/misc/at91_adc.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * include/asm-arm/arch-at91/at91_adc.h
- *
- * Copyright (C) SAN People
- *
- * Analog-to-Digital Converter (ADC) registers.
- * Based on AT91SAM9260 datasheet revision D.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef AT91_ADC_H
-#define AT91_ADC_H
-
-#define AT91_ADC_CR 0x00 /* Control Register */
-#define AT91_ADC_SWRST (1 << 0) /* Software Reset */
-#define AT91_ADC_START (1 << 1) /* Start Conversion */
-
-#define AT91_ADC_MR 0x04 /* Mode Register */
-#define AT91_ADC_TRGEN (1 << 0) /* Trigger Enable */
-#define AT91_ADC_TRGSEL (7 << 1) /* Trigger Selection */
-#define AT91_ADC_TRGSEL_TC0 (0 << 1)
-#define AT91_ADC_TRGSEL_TC1 (1 << 1)
-#define AT91_ADC_TRGSEL_TC2 (2 << 1)
-#define AT91_ADC_TRGSEL_EXTERNAL (6 << 1)
-#define AT91_ADC_LOWRES (1 << 4) /* Low Resolution */
-#define AT91_ADC_SLEEP (1 << 5) /* Sleep Mode */
-#define AT91_ADC_PRESCAL (0x3f << 8) /* Prescalar Rate Selection */
-#define AT91_ADC_PRESCAL_(x) ((x) << 8)
-#define AT91_ADC_STARTUP (0x1f << 16) /* Startup Up Time */
-#define AT91_ADC_STARTUP_(x) ((x) << 16)
-#define AT91_ADC_SHTIM (0xf << 24) /* Sample & Hold Time */
-#define AT91_ADC_SHTIM_(x) ((x) << 24)
-
-#define AT91_ADC_CHER 0x10 /* Channel Enable Register */
-#define AT91_ADC_CHDR 0x14 /* Channel Disable Register */
-#define AT91_ADC_CHSR 0x18 /* Channel Status Register */
-#define AT91_ADC_CH(n) (1 << (n)) /* Channel Number */
-
-#define AT91_ADC_SR 0x1C /* Status Register */
-#define AT91_ADC_EOC(n) (1 << (n)) /* End of Conversion on Channel N */
-#define AT91_ADC_OVRE(n) (1 << ((n) + 8))/* Overrun Error on Channel N */
-#define AT91_ADC_DRDY (1 << 16) /* Data Ready */
-#define AT91_ADC_GOVRE (1 << 17) /* General Overrun Error */
-#define AT91_ADC_ENDRX (1 << 18) /* End of RX Buffer */
-#define AT91_ADC_RXFUFF (1 << 19) /* RX Buffer Full */
-
-#define AT91_ADC_LCDR 0x20 /* Last Converted Data Register */
-#define AT91_ADC_LDATA (0x3ff)
-
-#define AT91_ADC_IER 0x24 /* Interrupt Enable Register */
-#define AT91_ADC_IDR 0x28 /* Interrupt Disable Register */
-#define AT91_ADC_IMR 0x2C /* Interrupt Mask Register */
-
-#define AT91_ADC_CHR(n) (0x30 + ((n) * 4)) /* Channel Data Register N */
-#define AT91_ADC_DATA (0x3ff)
-
-#endif
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 13:48:47 +0000