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Commit 6764cbd7 authored by Vijay Kumar's avatar Vijay Kumar Committed by Greg Kroah-Hartman
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Staging: Remove staging/poch 

Remove staging/poch.

Reasons for removal are -- The driver has serious cache
issues, that I couldn't fix. The card vendor is working
on a better replacement for the driver. The driver has
been delayed a lot and development has come to a stand
still.
Signed-off-by: default avatarVijay Kumar B. <vijaykumar@bravegnu.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 24d2d8be
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Showing with 0 additions and 1624 deletions
drivers/staging/Kconfig
View file @ 6764cbd7
...@@ -57,8 +57,6 @@ source "drivers/staging/wlan-ng/Kconfig" ...@@ -57,8 +57,6 @@ source "drivers/staging/wlan-ng/Kconfig"
source "drivers/staging/echo/Kconfig" source "drivers/staging/echo/Kconfig"
source "drivers/staging/poch/Kconfig"
source "drivers/staging/otus/Kconfig" source "drivers/staging/otus/Kconfig"
source "drivers/staging/rt2860/Kconfig" source "drivers/staging/rt2860/Kconfig"
......
drivers/staging/Makefile
View file @ 6764cbd7
...@@ -11,7 +11,6 @@ obj-$(CONFIG_USB_IP_COMMON) += usbip/ ...@@ -11,7 +11,6 @@ obj-$(CONFIG_USB_IP_COMMON) += usbip/
obj-$(CONFIG_W35UND) += winbond/ obj-$(CONFIG_W35UND) += winbond/
obj-$(CONFIG_PRISM2_USB) += wlan-ng/ obj-$(CONFIG_PRISM2_USB) += wlan-ng/
obj-$(CONFIG_ECHO) += echo/ obj-$(CONFIG_ECHO) += echo/
obj-$(CONFIG_POCH) += poch/
obj-$(CONFIG_OTUS) += otus/ obj-$(CONFIG_OTUS) += otus/
obj-$(CONFIG_RT2860) += rt2860/ obj-$(CONFIG_RT2860) += rt2860/
obj-$(CONFIG_RT2870) += rt2870/ obj-$(CONFIG_RT2870) += rt2870/
......
drivers/staging/poch/Kconfig deleted 100644 → 0
View file @ 24d2d8be
config POCH
tristate "Redrapids Pocket Change CardBus support"
depends on PCI && UIO
default N
---help---
Enable support for Redrapids Pocket Change CardBus devices.
drivers/staging/poch/Makefile deleted 100644 → 0
View file @ 24d2d8be
obj-$(CONFIG_POCH) += poch.o
drivers/staging/poch/README deleted 100644 → 0
View file @ 24d2d8be
TODO:
- Rx block size is limited to < 2048, hardware bug?
- Group size is limited to < page size, kernel alloc/mmap API issues
- test whether Tx is transmitting data from provided buffers
- handle device unplug case
- handle temperature above threshold
- use bus address instead of physical address for DMA
- support for snapshot mode
- audit userspace interfaces
- get reserved major/minor if needed
Sample Code:
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <poll.h>
#include <stdio.h>
#include <error.h>
#include <errno.h>
#include <fcntl.h>
#include <stdint.h>
#include <sysfs/libsysfs.h>
#include <poch.h>
struct pconsume {
uint32_t * offsets;
uint32_t nfetch;
uint32_t nflush;
};
uint32_t offsets[10];
void process_group(unsigned char *buf, uint32_t size)
{
uint16_t *buf16 = (uint16_t *)buf;
printf("RX: %p %u %04x %04x %04x %04x %04x %04x\n", buf, size,
buf16[0], buf16[1], buf16[2], buf16[3], buf16[4], buf16[5]);
}
int main()
{
struct sysfs_attribute *attr;
char *path;
int ret;
unsigned long mmap_size;
int fd;
unsigned char *cbuf;
uint32_t nflush;
struct pollfd poll_fds;
int count = 0;
int i;
path = "/sys/class/pocketchange/poch0/ch0/block_size";
attr = sysfs_open_attribute(path);
ret = sysfs_write_attribute(attr, "256", strlen("256"));
if (ret == -1)
error(1, errno, "error writing attribute %s", path);
sysfs_close_attribute(attr);
path = "/sys/class/pocketchange/poch0/ch0/group_size";
attr = sysfs_open_attribute(path);
ret = sysfs_write_attribute(attr, "4096", strlen("4096"));
if (ret == -1)
error(1, errno, "error writing attribute %s", path);
sysfs_close_attribute(attr);
path = "/sys/class/pocketchange/poch0/ch0/group_count";
attr = sysfs_open_attribute(path);
ret = sysfs_write_attribute(attr, "64", strlen("64"));
if (ret == -1)
error(1, errno, "error writing attribute %s", path);
sysfs_close_attribute(attr);
fd = open("/dev/ch0", O_RDWR);
if (fd == -1)
error(1, errno, "error opening device node");
path = "/sys/class/pocketchange/poch0/ch0/mmap_size";
attr = sysfs_open_attribute(path);
ret = sysfs_read_attribute(attr);
if (ret == -1)
error(1, errno, "error reading attribute %s", path);
printf("%s", attr->value);
sscanf(attr->value, "%lu", &mmap_size);
sysfs_close_attribute(attr);
cbuf = mmap(NULL, mmap_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE, fd, 0);
if (cbuf == MAP_FAILED)
error(1, errno, "error mapping DMA buffers");
ret = ioctl(fd, POCH_IOC_TRANSFER_START, 0);
if (ret == -1)
error(1, errno, "error starting transfer");
nflush = 0;
while (1) {
struct pconsume consume;
consume.offsets = offsets;
consume.nfetch = 10;
consume.nflush = nflush;
ret = ioctl(fd, POCH_IOC_CONSUME, &consume);
if (ret == -1)
error(1, errno, "error consuming groups");
nflush = consume.nfetch;
for (i = 0; i < nflush; i++) {
process_group(cbuf + consume.offsets[i], 4096);
count++;
if (count == 1000)
break;
}
if (count == 1000)
break;
}
ret = ioctl(fd, POCH_IOC_TRANSFER_STOP, 0);
if (ret == -1)
error(1, errno, "error starting transfer");
return 0;
}
Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
Vijay Kumar <vijaykumar@bravegnu.org> and Jaya Kumar <jayakumar.lkml@gmail.com>
drivers/staging/poch/poch.c deleted 100644 → 0
View file @ 24d2d8be
/*
* User-space DMA and UIO based Redrapids Pocket Change CardBus driver
*
* Copyright 2008 Vijay Kumar <vijaykumar@bravegnu.org>
*
* Licensed under GPL version 2 only.
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/uio_driver.h>
#include <linux/spinlock.h>
#include <linux/cdev.h>
#include <linux/delay.h>
#include <linux/sysfs.h>
#include <linux/poll.h>
#include <linux/idr.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ioctl.h>
#include <linux/io.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include "poch.h"
#include <asm/cacheflush.h>
#ifndef PCI_VENDOR_ID_RRAPIDS
#define PCI_VENDOR_ID_RRAPIDS 0x17D2
#endif
#ifndef PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE
#define PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE 0x0351
#endif
#define POCH_NCHANNELS 2
#define MAX_POCH_CARDS 8
#define MAX_POCH_DEVICES (MAX_POCH_CARDS * POCH_NCHANNELS)
#define DRV_NAME "poch"
#define PFX DRV_NAME ": "
/*
* BAR0 Bridge Register Definitions
*/
#define BRIDGE_REV_REG 0x0
#define BRIDGE_INT_MASK_REG 0x4
#define BRIDGE_INT_STAT_REG 0x8
#define BRIDGE_INT_ACTIVE (0x1 << 31)
#define BRIDGE_INT_FPGA (0x1 << 2)
#define BRIDGE_INT_TEMP_FAIL (0x1 << 1)
#define BRIDGE_INT_TEMP_WARN (0x1 << 0)
#define BRIDGE_FPGA_RESET_REG 0xC
#define BRIDGE_CARD_POWER_REG 0x10
#define BRIDGE_CARD_POWER_EN (0x1 << 0)
#define BRIDGE_CARD_POWER_PROG_DONE (0x1 << 31)
#define BRIDGE_JTAG_REG 0x14
#define BRIDGE_DMA_GO_REG 0x18
#define BRIDGE_STAT_0_REG 0x1C
#define BRIDGE_STAT_1_REG 0x20
#define BRIDGE_STAT_2_REG 0x24
#define BRIDGE_STAT_3_REG 0x28
#define BRIDGE_TEMP_STAT_REG 0x2C
#define BRIDGE_TEMP_THRESH_REG 0x30
#define BRIDGE_EEPROM_REVSEL_REG 0x34
#define BRIDGE_CIS_STRUCT_REG 0x100
#define BRIDGE_BOARDREV_REG 0x124
/*
* BAR1 FPGA Register Definitions
*/
#define FPGA_IFACE_REV_REG 0x0
#define FPGA_RX_BLOCK_SIZE_REG 0x8
#define FPGA_TX_BLOCK_SIZE_REG 0xC
#define FPGA_RX_BLOCK_COUNT_REG 0x10
#define FPGA_TX_BLOCK_COUNT_REG 0x14
#define FPGA_RX_CURR_DMA_BLOCK_REG 0x18
#define FPGA_TX_CURR_DMA_BLOCK_REG 0x1C
#define FPGA_RX_GROUP_COUNT_REG 0x20
#define FPGA_TX_GROUP_COUNT_REG 0x24
#define FPGA_RX_CURR_GROUP_REG 0x28
#define FPGA_TX_CURR_GROUP_REG 0x2C
#define FPGA_RX_CURR_PCI_REG 0x38
#define FPGA_TX_CURR_PCI_REG 0x3C
#define FPGA_RX_GROUP0_START_REG 0x40
#define FPGA_TX_GROUP0_START_REG 0xC0
#define FPGA_DMA_DESC_1_REG 0x140
#define FPGA_DMA_DESC_2_REG 0x144
#define FPGA_DMA_DESC_3_REG 0x148
#define FPGA_DMA_DESC_4_REG 0x14C
#define FPGA_DMA_INT_STAT_REG 0x150
#define FPGA_DMA_INT_MASK_REG 0x154
#define FPGA_DMA_INT_RX (1 << 0)
#define FPGA_DMA_INT_TX (1 << 1)
#define FPGA_RX_GROUPS_PER_INT_REG 0x158
#define FPGA_TX_GROUPS_PER_INT_REG 0x15C
#define FPGA_DMA_ADR_PAGE_REG 0x160
#define FPGA_FPGA_REV_REG 0x200
#define FPGA_ADC_CLOCK_CTL_REG 0x204
#define FPGA_ADC_CLOCK_CTL_OSC_EN (0x1 << 3)
#define FPGA_ADC_CLOCK_LOCAL_CLK (0x1 | FPGA_ADC_CLOCK_CTL_OSC_EN)
#define FPGA_ADC_CLOCK_EXT_SAMP_CLK 0X0
#define FPGA_ADC_DAC_EN_REG 0x208
#define FPGA_ADC_DAC_EN_DAC_OFF (0x1 << 1)
#define FPGA_ADC_DAC_EN_ADC_OFF (0x1 << 0)
#define FPGA_INT_STAT_REG 0x20C
#define FPGA_INT_MASK_REG 0x210
#define FPGA_INT_PLL_UNLOCKED (0x1 << 9)
#define FPGA_INT_DMA_CORE (0x1 << 8)
#define FPGA_INT_TX_FF_EMPTY (0x1 << 7)
#define FPGA_INT_RX_FF_EMPTY (0x1 << 6)
#define FPGA_INT_TX_FF_OVRFLW (0x1 << 3)
#define FPGA_INT_RX_FF_OVRFLW (0x1 << 2)
#define FPGA_INT_TX_ACQ_DONE (0x1 << 1)
#define FPGA_INT_RX_ACQ_DONE (0x1)
#define FPGA_RX_CTL_REG 0x214
#define FPGA_RX_CTL_FIFO_FLUSH (0x1 << 9)
#define FPGA_RX_CTL_SYNTH_DATA (0x1 << 8)
#define FPGA_RX_CTL_CONT_CAP (0x0 << 1)
#define FPGA_RX_CTL_SNAP_CAP (0x1 << 1)
#define FPGA_RX_ARM_REG 0x21C
#define FPGA_DOM_REG 0x224
#define FPGA_DOM_DCM_RESET (0x1 << 5)
#define FPGA_DOM_SOFT_RESET (0x1 << 4)
#define FPGA_DOM_DUAL_M_SG_DMA (0x0)
#define FPGA_DOM_TARGET_ACCESS (0x1)
#define FPGA_TX_CTL_REG 0x228
#define FPGA_TX_CTL_FIFO_FLUSH (0x1 << 9)
#define FPGA_TX_CTL_OUTPUT_ZERO (0x0 << 2)
#define FPGA_TX_CTL_OUTPUT_CARDBUS (0x1 << 2)
#define FPGA_TX_CTL_OUTPUT_ADC (0x2 << 2)
#define FPGA_TX_CTL_OUTPUT_SNAPSHOT (0x3 << 2)
#define FPGA_TX_CTL_LOOPBACK (0x1 << 0)
#define FPGA_ENDIAN_MODE_REG 0x22C
#define FPGA_RX_FIFO_COUNT_REG 0x28C
#define FPGA_TX_ENABLE_REG 0x298
#define FPGA_TX_TRIGGER_REG 0x29C
#define FPGA_TX_DATAMEM_COUNT_REG 0x2A8
#define FPGA_CAP_FIFO_REG 0x300
#define FPGA_TX_SNAPSHOT_REG 0x8000
/*
* Channel Index Definitions
*/
enum {
CHNO_RX_CHANNEL,
CHNO_TX_CHANNEL,
};
struct poch_dev;
enum channel_dir {
CHANNEL_DIR_RX,
CHANNEL_DIR_TX,
};
struct poch_group_info {
struct page *pg;
dma_addr_t dma_addr;
unsigned long user_offset;
};
struct channel_info {
unsigned int chno;
atomic_t sys_block_size;
atomic_t sys_group_size;
atomic_t sys_group_count;
enum channel_dir dir;
unsigned long block_size;
unsigned long group_size;
unsigned long group_count;
/* Contains the DMA address and VM offset of each group. */
struct poch_group_info *groups;
/* Contains the header and circular buffer exported to userspace. */
spinlock_t group_offsets_lock;
/* Last group consumed by user space. */
unsigned int consumed;
/* Last group indicated as 'complete' to user space. */
unsigned int transfer;
wait_queue_head_t wq;
union {
unsigned int data_available;
unsigned int space_available;
};
void __iomem *bridge_iomem;
void __iomem *fpga_iomem;
spinlock_t *iomem_lock;
atomic_t free;
atomic_t inited;
/* Error counters */
struct poch_counters counters;
spinlock_t counters_lock;
struct device *dev;
};
struct poch_dev {
struct uio_info uio;
struct pci_dev *pci_dev;
unsigned int nchannels;
struct channel_info channels[POCH_NCHANNELS];
struct cdev cdev;
/* Counts the no. of channels that have been opened. On first
* open, the card is powered on. On last channel close, the
* card is powered off.
*/
atomic_t usage;
void __iomem *bridge_iomem;
void __iomem *fpga_iomem;
spinlock_t iomem_lock;
struct device *dev;
};
static int synth_rx;
module_param(synth_rx, bool, 0600);
MODULE_PARM_DESC(synth_rx,
"Synthesize received values using a counter. Default: No");
static int loopback;
module_param(loopback, bool, 0600);
MODULE_PARM_DESC(loopback,
"Enable hardware loopback of trasnmitted data. Default: No");
static dev_t poch_first_dev;
static struct class *poch_cls;
static DEFINE_IDR(poch_ids);
static ssize_t store_block_size(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_info *channel = dev_get_drvdata(dev);
unsigned long block_size;
sscanf(buf, "%lu", &block_size);
atomic_set(&channel->sys_block_size, block_size);
return count;
}
static DEVICE_ATTR(block_size, S_IWUSR|S_IWGRP, NULL, store_block_size);
static ssize_t store_group_size(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_info *channel = dev_get_drvdata(dev);
unsigned long group_size;
sscanf(buf, "%lu", &group_size);
atomic_set(&channel->sys_group_size, group_size);
return count;
}
static DEVICE_ATTR(group_size, S_IWUSR|S_IWGRP, NULL, store_group_size);
static ssize_t store_group_count(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct channel_info *channel = dev_get_drvdata(dev);
unsigned long group_count;
sscanf(buf, "%lu", &group_count);
atomic_set(&channel->sys_group_count, group_count);
return count;
}
static DEVICE_ATTR(group_count, S_IWUSR|S_IWGRP, NULL, store_group_count);
static ssize_t show_direction(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_info *channel = dev_get_drvdata(dev);
int len;
len = sprintf(buf, "%s\n", (channel->dir ? "tx" : "rx"));
return len;
}
static DEVICE_ATTR(dir, S_IRUSR|S_IRGRP, show_direction, NULL);
static unsigned long npages(unsigned long bytes)
{
if (bytes % PAGE_SIZE == 0)
return bytes / PAGE_SIZE;
else
return (bytes / PAGE_SIZE) + 1;
}
static ssize_t show_mmap_size(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct channel_info *channel = dev_get_drvdata(dev);
int len;
unsigned long mmap_size;
unsigned long group_pages;
unsigned long total_group_pages;
group_pages = npages(channel->group_size);
total_group_pages = group_pages * channel->group_count;
mmap_size = total_group_pages * PAGE_SIZE;
len = sprintf(buf, "%lu\n", mmap_size);
return len;
}
static DEVICE_ATTR(mmap_size, S_IRUSR|S_IRGRP, show_mmap_size, NULL);
static struct device_attribute *poch_class_attrs[] = {
&dev_attr_block_size,
&dev_attr_group_size,
&dev_attr_group_count,
&dev_attr_dir,
&dev_attr_mmap_size,
};
static void poch_channel_free_groups(struct channel_info *channel)
{
unsigned long i;
for (i = 0; i < channel->group_count; i++) {
struct poch_group_info *group;
unsigned int order;
group = &channel->groups[i];
order = get_order(channel->group_size);
if (group->pg)
__free_pages(group->pg, order);
}
}
static int poch_channel_alloc_groups(struct channel_info *channel)
{
unsigned long i;
unsigned long group_pages;
group_pages = npages(channel->group_size);
for (i = 0; i < channel->group_count; i++) {
struct poch_group_info *group;
unsigned int order;
gfp_t gfp_mask;
group = &channel->groups[i];
order = get_order(channel->group_size);
/*
* __GFP_COMP is required here since we are going to
* perform non-linear mapping to userspace. For more
* information read the vm_insert_page() function
* comments.
*/
gfp_mask = GFP_KERNEL | GFP_DMA32 | __GFP_ZERO;
group->pg = alloc_pages(gfp_mask, order);
if (!group->pg) {
poch_channel_free_groups(channel);
return -ENOMEM;
}
/* FIXME: This is the physical address not the bus
* address! This won't work in architectures that
* have an IOMMU. Can we use pci_map_single() for
* this?
*/
group->dma_addr = page_to_pfn(group->pg) * PAGE_SIZE;
group->user_offset = (i * group_pages) * PAGE_SIZE;
printk(KERN_INFO PFX "%ld: user_offset: 0x%lx\n", i,
group->user_offset);
}
return 0;
}
static int channel_latch_attr(struct channel_info *channel)
{
channel->group_count = atomic_read(&channel->sys_group_count);
channel->group_size = atomic_read(&channel->sys_group_size);
channel->block_size = atomic_read(&channel->sys_block_size);
if (channel->group_count == 0) {
printk(KERN_ERR PFX "invalid group count %lu",
channel->group_count);
return -EINVAL;
}
if (channel->group_size == 0 ||
channel->group_size < channel->block_size) {
printk(KERN_ERR PFX "invalid group size %lu",
channel->group_size);
return -EINVAL;
}
if (channel->block_size == 0 || (channel->block_size % 8) != 0) {
printk(KERN_ERR PFX "invalid block size %lu",
channel->block_size);
return -EINVAL;
}
if (channel->group_size % channel->block_size != 0) {
printk(KERN_ERR PFX
"group size should be multiple of block size");
return -EINVAL;
}
return 0;
}
/*
* Configure DMA group registers
*/
static void channel_dma_init(struct channel_info *channel)
{
void __iomem *fpga = channel->fpga_iomem;
u32 group_regs_base;
u32 group_reg;
unsigned int page;
unsigned int group_in_page;
unsigned long i;
u32 block_size_reg;
u32 block_count_reg;
u32 group_count_reg;
u32 groups_per_int_reg;
u32 curr_pci_reg;
if (channel->chno == CHNO_RX_CHANNEL) {
group_regs_base = FPGA_RX_GROUP0_START_REG;
block_size_reg = FPGA_RX_BLOCK_SIZE_REG;
block_count_reg = FPGA_RX_BLOCK_COUNT_REG;
group_count_reg = FPGA_RX_GROUP_COUNT_REG;
groups_per_int_reg = FPGA_RX_GROUPS_PER_INT_REG;
curr_pci_reg = FPGA_RX_CURR_PCI_REG;
} else {
group_regs_base = FPGA_TX_GROUP0_START_REG;
block_size_reg = FPGA_TX_BLOCK_SIZE_REG;
block_count_reg = FPGA_TX_BLOCK_COUNT_REG;
group_count_reg = FPGA_TX_GROUP_COUNT_REG;
groups_per_int_reg = FPGA_TX_GROUPS_PER_INT_REG;
curr_pci_reg = FPGA_TX_CURR_PCI_REG;
}
printk(KERN_WARNING "block_size, group_size, group_count\n");
/*
* Block size is represented in no. of 64 bit transfers.
*/
iowrite32(channel->block_size / 8, fpga + block_size_reg);
iowrite32(channel->group_size / channel->block_size,
fpga + block_count_reg);
iowrite32(channel->group_count, fpga + group_count_reg);
/* FIXME: Hardcoded groups per int. Get it from sysfs? */
iowrite32(16, fpga + groups_per_int_reg);
/* Unlock PCI address? Not defined in the data sheet, but used
* in the reference code by Redrapids.
*/
iowrite32(0x1, fpga + curr_pci_reg);
/* The DMA address page register is shared between the RX and
* TX channels, so acquire lock.
*/
for (i = 0; i < channel->group_count; i++) {
page = i / 32;
group_in_page = i % 32;
group_reg = group_regs_base + (group_in_page * 4);
spin_lock(channel->iomem_lock);
iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG);
iowrite32(channel->groups[i].dma_addr, fpga + group_reg);
spin_unlock(channel->iomem_lock);
}
for (i = 0; i < channel->group_count; i++) {
page = i / 32;
group_in_page = i % 32;
group_reg = group_regs_base + (group_in_page * 4);
spin_lock(channel->iomem_lock);
iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG);
printk(KERN_INFO PFX "%ld: read dma_addr: 0x%x\n", i,
ioread32(fpga + group_reg));
spin_unlock(channel->iomem_lock);
}
}
static void __poch_channel_clear_counters(struct channel_info *channel)
{
channel->counters.pll_unlock = 0;
channel->counters.fifo_empty = 0;
channel->counters.fifo_overflow = 0;
}
static int poch_channel_init(struct channel_info *channel,
struct poch_dev *poch_dev)
{
struct pci_dev *pdev = poch_dev->pci_dev;
struct device *dev = &pdev->dev;
unsigned long alloc_size;
int ret;
printk(KERN_WARNING "channel_latch_attr\n");
ret = channel_latch_attr(channel);
if (ret != 0)
goto out;
channel->consumed = 0;
channel->transfer = 0;
/* Allocate memory to hold group information. */
alloc_size = channel->group_count * sizeof(struct poch_group_info);
channel->groups = kzalloc(alloc_size, GFP_KERNEL);
if (!channel->groups) {
dev_err(dev, "error allocating memory for group info\n");
ret = -ENOMEM;
goto out;
}
printk(KERN_WARNING "poch_channel_alloc_groups\n");
ret = poch_channel_alloc_groups(channel);
if (ret) {
dev_err(dev, "error allocating groups of order %d\n",
get_order(channel->group_size));
goto out_free_group_info;
}
channel->fpga_iomem = poch_dev->fpga_iomem;
channel->bridge_iomem = poch_dev->bridge_iomem;
channel->iomem_lock = &poch_dev->iomem_lock;
spin_lock_init(&channel->counters_lock);
__poch_channel_clear_counters(channel);
return 0;
out_free_group_info:
kfree(channel->groups);
out:
return ret;
}
static int poch_wait_fpga_prog(void __iomem *bridge)
{
unsigned long total_wait;
const unsigned long wait_period = 100;
/* FIXME: Get the actual timeout */
const unsigned long prog_timeo = 10000; /* 10 Seconds */
u32 card_power;
printk(KERN_WARNING "poch_wait_fpg_prog\n");
printk(KERN_INFO PFX "programming fpga ...\n");
total_wait = 0;
while (1) {
msleep(wait_period);
total_wait += wait_period;
card_power = ioread32(bridge + BRIDGE_CARD_POWER_REG);
if (card_power & BRIDGE_CARD_POWER_PROG_DONE) {
printk(KERN_INFO PFX "programming done\n");
return 0;
}
if (total_wait > prog_timeo) {
printk(KERN_ERR PFX
"timed out while programming FPGA\n");
return -EIO;
}
}
}
static void poch_card_power_off(struct poch_dev *poch_dev)
{
void __iomem *bridge = poch_dev->bridge_iomem;
u32 card_power;
iowrite32(0, bridge + BRIDGE_INT_MASK_REG);
iowrite32(0, bridge + BRIDGE_DMA_GO_REG);
card_power = ioread32(bridge + BRIDGE_CARD_POWER_REG);
iowrite32(card_power & ~BRIDGE_CARD_POWER_EN,
bridge + BRIDGE_CARD_POWER_REG);
}
enum clk_src {
CLK_SRC_ON_BOARD,
CLK_SRC_EXTERNAL
};
static void poch_card_clock_on(void __iomem *fpga)
{
/* FIXME: Get this data through sysfs? */
enum clk_src clk_src = CLK_SRC_ON_BOARD;
if (clk_src == CLK_SRC_ON_BOARD) {
iowrite32(FPGA_ADC_CLOCK_LOCAL_CLK | FPGA_ADC_CLOCK_CTL_OSC_EN,
fpga + FPGA_ADC_CLOCK_CTL_REG);
} else if (clk_src == CLK_SRC_EXTERNAL) {
iowrite32(FPGA_ADC_CLOCK_EXT_SAMP_CLK,
fpga + FPGA_ADC_CLOCK_CTL_REG);
}
}
static int poch_card_power_on(struct poch_dev *poch_dev)
{
void __iomem *bridge = poch_dev->bridge_iomem;
void __iomem *fpga = poch_dev->fpga_iomem;
iowrite32(BRIDGE_CARD_POWER_EN, bridge + BRIDGE_CARD_POWER_REG);
if (poch_wait_fpga_prog(bridge) != 0) {
poch_card_power_off(poch_dev);
return -EIO;
}
poch_card_clock_on(fpga);
/* Sync to new clock, reset state machines, set DMA mode. */
iowrite32(FPGA_DOM_DCM_RESET | FPGA_DOM_SOFT_RESET
| FPGA_DOM_DUAL_M_SG_DMA, fpga + FPGA_DOM_REG);
/* FIXME: The time required for sync. needs to be tuned. */
msleep(1000);
return 0;
}
static void poch_channel_analog_on(struct channel_info *channel)
{
void __iomem *fpga = channel->fpga_iomem;
u32 adc_dac_en;
spin_lock(channel->iomem_lock);
adc_dac_en = ioread32(fpga + FPGA_ADC_DAC_EN_REG);
switch (channel->chno) {
case CHNO_RX_CHANNEL:
iowrite32(adc_dac_en & ~FPGA_ADC_DAC_EN_ADC_OFF,
fpga + FPGA_ADC_DAC_EN_REG);
break;
case CHNO_TX_CHANNEL:
iowrite32(adc_dac_en & ~FPGA_ADC_DAC_EN_DAC_OFF,
fpga + FPGA_ADC_DAC_EN_REG);
break;
}
spin_unlock(channel->iomem_lock);
}
static int poch_open(struct inode *inode, struct file *filp)
{
struct poch_dev *poch_dev;
struct channel_info *channel;
void __iomem *bridge;
void __iomem *fpga;
int chno;
int usage;
int ret;
poch_dev = container_of(inode->i_cdev, struct poch_dev, cdev);
bridge = poch_dev->bridge_iomem;
fpga = poch_dev->fpga_iomem;
chno = iminor(inode) % poch_dev->nchannels;
channel = &poch_dev->channels[chno];
if (!atomic_dec_and_test(&channel->free)) {
atomic_inc(&channel->free);
ret = -EBUSY;
goto out;
}
usage = atomic_inc_return(&poch_dev->usage);
printk(KERN_WARNING "poch_card_power_on\n");
if (usage == 1) {
ret = poch_card_power_on(poch_dev);
if (ret)
goto out_dec_usage;
}
printk(KERN_INFO "CardBus Bridge Revision: %x\n",
ioread32(bridge + BRIDGE_REV_REG));
printk(KERN_INFO "CardBus Interface Revision: %x\n",
ioread32(fpga + FPGA_IFACE_REV_REG));
channel->chno = chno;
filp->private_data = channel;
printk(KERN_WARNING "poch_channel_init\n");
ret = poch_channel_init(channel, poch_dev);
if (ret)
goto out_power_off;
poch_channel_analog_on(channel);
printk(KERN_WARNING "channel_dma_init\n");
channel_dma_init(channel);
printk(KERN_WARNING "poch_channel_analog_on\n");
if (usage == 1) {
printk(KERN_WARNING "setting up DMA\n");
/* Initialize DMA Controller. */
iowrite32(FPGA_CAP_FIFO_REG, bridge + BRIDGE_STAT_2_REG);
iowrite32(FPGA_DMA_DESC_1_REG, bridge + BRIDGE_STAT_3_REG);
ioread32(fpga + FPGA_DMA_INT_STAT_REG);
ioread32(fpga + FPGA_INT_STAT_REG);
ioread32(bridge + BRIDGE_INT_STAT_REG);
/* Initialize Interrupts. FIXME: Enable temperature
* handling We are enabling both Tx and Rx channel
* interrupts here. Do we need to enable interrupts
* only for the current channel? Anyways we won't get
* the interrupt unless the DMA is activated.
*/
iowrite32(BRIDGE_INT_FPGA, bridge + BRIDGE_INT_MASK_REG);
iowrite32(FPGA_INT_DMA_CORE
| FPGA_INT_PLL_UNLOCKED
| FPGA_INT_TX_FF_EMPTY
| FPGA_INT_RX_FF_EMPTY
| FPGA_INT_TX_FF_OVRFLW
| FPGA_INT_RX_FF_OVRFLW,
fpga + FPGA_INT_MASK_REG);
iowrite32(FPGA_DMA_INT_RX | FPGA_DMA_INT_TX,
fpga + FPGA_DMA_INT_MASK_REG);
}
if (channel->dir == CHANNEL_DIR_TX) {
/* Flush TX FIFO and output data from cardbus. */
u32 ctl_val = 0;
ctl_val |= FPGA_TX_CTL_FIFO_FLUSH;
ctl_val |= FPGA_TX_CTL_OUTPUT_CARDBUS;
if (loopback)
ctl_val |= FPGA_TX_CTL_LOOPBACK;
iowrite32(ctl_val, fpga + FPGA_TX_CTL_REG);
} else {
/* Flush RX FIFO and output data to cardbus. */
u32 ctl_val = FPGA_RX_CTL_CONT_CAP | FPGA_RX_CTL_FIFO_FLUSH;
if (synth_rx)
ctl_val |= FPGA_RX_CTL_SYNTH_DATA;
iowrite32(ctl_val, fpga + FPGA_RX_CTL_REG);
}
atomic_inc(&channel->inited);
return 0;
out_power_off:
if (usage == 1)
poch_card_power_off(poch_dev);
out_dec_usage:
atomic_dec(&poch_dev->usage);
atomic_inc(&channel->free);
out:
return ret;
}
static int poch_release(struct inode *inode, struct file *filp)
{
struct channel_info *channel = filp->private_data;
struct poch_dev *poch_dev;
int usage;
poch_dev = container_of(inode->i_cdev, struct poch_dev, cdev);
usage = atomic_dec_return(&poch_dev->usage);
if (usage == 0) {
printk(KERN_WARNING "poch_card_power_off\n");
poch_card_power_off(poch_dev);
}
atomic_dec(&channel->inited);
poch_channel_free_groups(channel);
kfree(channel->groups);
atomic_inc(&channel->free);
return 0;
}
/*
* Map the the group buffers, to user space.
*/
static int poch_mmap(struct file *filp, struct vm_area_struct *vma)
{
struct channel_info *channel = filp->private_data;
unsigned long start;
unsigned long size;
unsigned long group_pages;
unsigned long total_group_pages;
int pg_num;
struct page *pg;
int i;
int ret;
printk(KERN_WARNING "poch_mmap\n");
if (vma->vm_pgoff) {
printk(KERN_WARNING PFX "page offset: %lu\n", vma->vm_pgoff);
return -EINVAL;
}
group_pages = npages(channel->group_size);
total_group_pages = group_pages * channel->group_count;
size = vma->vm_end - vma->vm_start;
if (size != total_group_pages * PAGE_SIZE) {
printk(KERN_WARNING PFX "required %lu bytes\n", size);
return -EINVAL;
}
start = vma->vm_start;
for (i = 0; i < channel->group_count; i++) {
pg = channel->groups[i].pg;
for (pg_num = 0; pg_num < group_pages; pg_num++, pg++) {
printk(KERN_DEBUG PFX "%d: group %d: 0x%lx\n",
pg_num, i, start);
ret = vm_insert_page(vma, start, pg);
if (ret) {
printk(KERN_DEBUG PFX
"vm_insert 2 failed at %d\n", pg_num);
return ret;
}
start += PAGE_SIZE;
}
}
return 0;
}
/*
* Check whether there is some group that the user space has not
* consumed yet. When the user space consumes a group, it sets it to
* -1. Cosuming could be reading data in case of RX and filling a
* buffer in case of TX.
*/
static int poch_channel_available(struct channel_info *channel)
{
int available = 0;
spin_lock_irq(&channel->group_offsets_lock);
if (channel->consumed != channel->transfer)
available = 1;
spin_unlock_irq(&channel->group_offsets_lock);
return available;
}
static unsigned int poch_poll(struct file *filp, poll_table *pt)
{
struct channel_info *channel = filp->private_data;
unsigned int ret = 0;
poll_wait(filp, &channel->wq, pt);
if (poch_channel_available(channel)) {
if (channel->dir == CHANNEL_DIR_RX)
ret = POLLIN | POLLRDNORM;
else
ret = POLLOUT | POLLWRNORM;
}
return ret;
}
static int poch_ioctl(struct inode *inode, struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct channel_info *channel = filp->private_data;
void __iomem *fpga = channel->fpga_iomem;
void __iomem *bridge = channel->bridge_iomem;
void __user *argp = (void __user *)arg;
struct vm_area_struct *vms;
struct poch_counters counters;
int ret;
switch (cmd) {
case POCH_IOC_TRANSFER_START:
switch (channel->chno) {
case CHNO_TX_CHANNEL:
printk(KERN_INFO PFX "ioctl: Tx start\n");
iowrite32(0x1, fpga + FPGA_TX_TRIGGER_REG);
iowrite32(0x1, fpga + FPGA_TX_ENABLE_REG);
/* FIXME: Does it make sense to do a DMA GO
* twice, once in Tx and once in Rx.
*/
iowrite32(0x1, bridge + BRIDGE_DMA_GO_REG);
break;
case CHNO_RX_CHANNEL:
printk(KERN_INFO PFX "ioctl: Rx start\n");
iowrite32(0x1, fpga + FPGA_RX_ARM_REG);
iowrite32(0x1, bridge + BRIDGE_DMA_GO_REG);
break;
}
break;
case POCH_IOC_TRANSFER_STOP:
switch (channel->chno) {
case CHNO_TX_CHANNEL:
printk(KERN_INFO PFX "ioctl: Tx stop\n");
iowrite32(0x0, fpga + FPGA_TX_ENABLE_REG);
iowrite32(0x0, fpga + FPGA_TX_TRIGGER_REG);
iowrite32(0x0, bridge + BRIDGE_DMA_GO_REG);
break;
case CHNO_RX_CHANNEL:
printk(KERN_INFO PFX "ioctl: Rx stop\n");
iowrite32(0x0, fpga + FPGA_RX_ARM_REG);
iowrite32(0x0, bridge + BRIDGE_DMA_GO_REG);
break;
}
break;
case POCH_IOC_CONSUME:
{
int available;
int nfetch;
unsigned int from;
unsigned int count;
unsigned int i, j;
struct poch_consume consume;
struct poch_consume *uconsume;
uconsume = argp;
ret = copy_from_user(&consume, uconsume, sizeof(consume));
if (ret)
return ret;
spin_lock_irq(&channel->group_offsets_lock);
channel->consumed += consume.nflush;
channel->consumed %= channel->group_count;
available = channel->transfer - channel->consumed;
if (available < 0)
available += channel->group_count;
from = channel->consumed;
spin_unlock_irq(&channel->group_offsets_lock);
nfetch = consume.nfetch;
count = min(available, nfetch);
for (i = 0; i < count; i++) {
j = (from + i) % channel->group_count;
ret = put_user(channel->groups[j].user_offset,
&consume.offsets[i]);
if (ret)
return -EFAULT;
}
ret = put_user(count, &uconsume->nfetch);
if (ret)
return -EFAULT;
break;
}
case POCH_IOC_GET_COUNTERS:
if (!access_ok(VERIFY_WRITE, argp, sizeof(struct poch_counters)))
return -EFAULT;
spin_lock_irq(&channel->counters_lock);
counters = channel->counters;
__poch_channel_clear_counters(channel);
spin_unlock_irq(&channel->counters_lock);
ret = copy_to_user(argp, &counters,
sizeof(struct poch_counters));
if (ret)
return ret;
break;
case POCH_IOC_SYNC_GROUP_FOR_USER:
case POCH_IOC_SYNC_GROUP_FOR_DEVICE:
vms = find_vma(current->mm, arg);
if (!vms)
/* Address not mapped. */
return -EINVAL;
if (vms->vm_file != filp)
/* Address mapped from different device/file. */
return -EINVAL;
flush_cache_range(vms, arg, arg + channel->group_size);
break;
}
return 0;
}
static struct file_operations poch_fops = {
.owner = THIS_MODULE,
.open = poch_open,
.release = poch_release,
.ioctl = poch_ioctl,
.poll = poch_poll,
.mmap = poch_mmap
};
static void poch_irq_dma(struct channel_info *channel)
{
u32 prev_transfer;
u32 curr_transfer;
long groups_done;
unsigned long i, j;
struct poch_group_info *groups;
u32 curr_group_reg;
if (!atomic_read(&channel->inited))
return;
prev_transfer = channel->transfer;
if (channel->chno == CHNO_RX_CHANNEL)
curr_group_reg = FPGA_RX_CURR_GROUP_REG;
else
curr_group_reg = FPGA_TX_CURR_GROUP_REG;
curr_transfer = ioread32(channel->fpga_iomem + curr_group_reg);
groups_done = curr_transfer - prev_transfer;
/* Check wrap over, and handle it. */
if (groups_done <= 0)
groups_done += channel->group_count;
groups = channel->groups;
spin_lock(&channel->group_offsets_lock);
for (i = 0; i < groups_done; i++) {
j = (prev_transfer + i) % channel->group_count;
channel->transfer += 1;
channel->transfer %= channel->group_count;
if (channel->transfer == channel->consumed) {
channel->consumed += 1;
channel->consumed %= channel->group_count;
}
}
spin_unlock(&channel->group_offsets_lock);
wake_up_interruptible(&channel->wq);
}
static irqreturn_t poch_irq_handler(int irq, void *p)
{
struct poch_dev *poch_dev = p;
void __iomem *bridge = poch_dev->bridge_iomem;
void __iomem *fpga = poch_dev->fpga_iomem;
struct channel_info *channel_rx = &poch_dev->channels[CHNO_RX_CHANNEL];
struct channel_info *channel_tx = &poch_dev->channels[CHNO_TX_CHANNEL];
u32 bridge_stat;
u32 fpga_stat;
u32 dma_stat;
bridge_stat = ioread32(bridge + BRIDGE_INT_STAT_REG);
fpga_stat = ioread32(fpga + FPGA_INT_STAT_REG);
dma_stat = ioread32(fpga + FPGA_DMA_INT_STAT_REG);
ioread32(fpga + FPGA_DMA_INT_STAT_REG);
ioread32(fpga + FPGA_INT_STAT_REG);
ioread32(bridge + BRIDGE_INT_STAT_REG);
if (bridge_stat & BRIDGE_INT_FPGA) {
if (fpga_stat & FPGA_INT_DMA_CORE) {
if (dma_stat & FPGA_DMA_INT_RX)
poch_irq_dma(channel_rx);
if (dma_stat & FPGA_DMA_INT_TX)
poch_irq_dma(channel_tx);
}
if (fpga_stat & FPGA_INT_PLL_UNLOCKED) {
channel_tx->counters.pll_unlock++;
channel_rx->counters.pll_unlock++;
if (printk_ratelimit())
printk(KERN_WARNING PFX "PLL unlocked\n");
}
if (fpga_stat & FPGA_INT_TX_FF_EMPTY)
channel_tx->counters.fifo_empty++;
if (fpga_stat & FPGA_INT_TX_FF_OVRFLW)
channel_tx->counters.fifo_overflow++;
if (fpga_stat & FPGA_INT_RX_FF_EMPTY)
channel_rx->counters.fifo_empty++;
if (fpga_stat & FPGA_INT_RX_FF_OVRFLW)
channel_rx->counters.fifo_overflow++;
/*
* FIXME: These errors should be notified through the
* poll interface as POLLERR.
*/
/* Re-enable interrupts. */
iowrite32(BRIDGE_INT_FPGA, bridge + BRIDGE_INT_MASK_REG);
return IRQ_HANDLED;
}
return IRQ_NONE;
}
static void poch_class_dev_unregister(struct poch_dev *poch_dev, int id)
{
int i, j;
int nattrs;
struct channel_info *channel;
dev_t devno;
if (poch_dev->dev == NULL)
return;
for (i = 0; i < poch_dev->nchannels; i++) {
channel = &poch_dev->channels[i];
devno = poch_first_dev + (id * poch_dev->nchannels) + i;
if (!channel->dev)
continue;
nattrs = sizeof(poch_class_attrs)/sizeof(poch_class_attrs[0]);
for (j = 0; j < nattrs; j++)
device_remove_file(channel->dev, poch_class_attrs[j]);
device_unregister(channel->dev);
}
device_unregister(poch_dev->dev);
}
static int __devinit poch_class_dev_register(struct poch_dev *poch_dev,
int id)
{
struct device *dev = &poch_dev->pci_dev->dev;
int i, j;
int nattrs;
int ret;
struct channel_info *channel;
dev_t devno;
poch_dev->dev = device_create(poch_cls, &poch_dev->pci_dev->dev,
MKDEV(0, 0), NULL, "poch%d", id);
if (IS_ERR(poch_dev->dev)) {
dev_err(dev, "error creating parent class device");
ret = PTR_ERR(poch_dev->dev);
poch_dev->dev = NULL;
return ret;
}
for (i = 0; i < poch_dev->nchannels; i++) {
channel = &poch_dev->channels[i];
devno = poch_first_dev + (id * poch_dev->nchannels) + i;
channel->dev = device_create(poch_cls, poch_dev->dev, devno,
NULL, "ch%d", i);
if (IS_ERR(channel->dev)) {
dev_err(dev, "error creating channel class device");
ret = PTR_ERR(channel->dev);
channel->dev = NULL;
poch_class_dev_unregister(poch_dev, id);
return ret;
}
dev_set_drvdata(channel->dev, channel);
nattrs = sizeof(poch_class_attrs)/sizeof(poch_class_attrs[0]);
for (j = 0; j < nattrs; j++) {
ret = device_create_file(channel->dev,
poch_class_attrs[j]);
if (ret) {
dev_err(dev, "error creating attribute file");
poch_class_dev_unregister(poch_dev, id);
return ret;
}
}
}
return 0;
}
static int __devinit poch_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *pci_id)
{
struct device *dev = &pdev->dev;
struct poch_dev *poch_dev;
struct uio_info *uio;
int ret;
int id;
int i;
poch_dev = kzalloc(sizeof(struct poch_dev), GFP_KERNEL);
if (!poch_dev) {
dev_err(dev, "error allocating priv. data memory\n");
return -ENOMEM;
}
poch_dev->pci_dev = pdev;
uio = &poch_dev->uio;
pci_set_drvdata(pdev, poch_dev);
spin_lock_init(&poch_dev->iomem_lock);
poch_dev->nchannels = POCH_NCHANNELS;
poch_dev->channels[CHNO_RX_CHANNEL].dir = CHANNEL_DIR_RX;
poch_dev->channels[CHNO_TX_CHANNEL].dir = CHANNEL_DIR_TX;
for (i = 0; i < poch_dev->nchannels; i++) {
init_waitqueue_head(&poch_dev->channels[i].wq);
atomic_set(&poch_dev->channels[i].free, 1);
atomic_set(&poch_dev->channels[i].inited, 0);
}
ret = pci_enable_device(pdev);
if (ret) {
dev_err(dev, "error enabling device\n");
goto out_free;
}
ret = pci_request_regions(pdev, "poch");
if (ret) {
dev_err(dev, "error requesting resources\n");
goto out_disable;
}
uio->mem[0].addr = pci_resource_start(pdev, 1);
if (!uio->mem[0].addr) {
dev_err(dev, "invalid BAR1\n");
ret = -ENODEV;
goto out_release;
}
uio->mem[0].size = pci_resource_len(pdev, 1);
uio->mem[0].memtype = UIO_MEM_PHYS;
uio->name = "poch";
uio->version = "0.0.1";
uio->irq = -1;
ret = uio_register_device(dev, uio);
if (ret) {
dev_err(dev, "error register UIO device: %d\n", ret);
goto out_release;
}
poch_dev->bridge_iomem = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (poch_dev->bridge_iomem == NULL) {
dev_err(dev, "error mapping bridge (bar0) registers\n");
ret = -ENOMEM;
goto out_uio_unreg;
}
poch_dev->fpga_iomem = ioremap(pci_resource_start(pdev, 1),
pci_resource_len(pdev, 1));
if (poch_dev->fpga_iomem == NULL) {
dev_err(dev, "error mapping fpga (bar1) registers\n");
ret = -ENOMEM;
goto out_bar0_unmap;
}
ret = request_irq(pdev->irq, poch_irq_handler, IRQF_SHARED,
dev_name(dev), poch_dev);
if (ret) {
dev_err(dev, "error requesting IRQ %u\n", pdev->irq);
ret = -ENOMEM;
goto out_bar1_unmap;
}
if (!idr_pre_get(&poch_ids, GFP_KERNEL)) {
dev_err(dev, "error allocating memory ids\n");
ret = -ENOMEM;
goto out_free_irq;
}
idr_get_new(&poch_ids, poch_dev, &id);
if (id >= MAX_POCH_CARDS) {
dev_err(dev, "minors exhausted\n");
ret = -EBUSY;
goto out_free_irq;
}
cdev_init(&poch_dev->cdev, &poch_fops);
poch_dev->cdev.owner = THIS_MODULE;
ret = cdev_add(&poch_dev->cdev,
poch_first_dev + (id * poch_dev->nchannels),
poch_dev->nchannels);
if (ret) {
dev_err(dev, "error register character device\n");
goto out_idr_remove;
}
ret = poch_class_dev_register(poch_dev, id);
if (ret)
goto out_cdev_del;
return 0;
out_cdev_del:
cdev_del(&poch_dev->cdev);
out_idr_remove:
idr_remove(&poch_ids, id);
out_free_irq:
free_irq(pdev->irq, poch_dev);
out_bar1_unmap:
iounmap(poch_dev->fpga_iomem);
out_bar0_unmap:
iounmap(poch_dev->bridge_iomem);
out_uio_unreg:
uio_unregister_device(uio);
out_release:
pci_release_regions(pdev);
out_disable:
pci_disable_device(pdev);
out_free:
kfree(poch_dev);
return ret;
}
/*
* FIXME: We are yet to handle the hot unplug case.
*/
static void poch_pci_remove(struct pci_dev *pdev)
{
struct poch_dev *poch_dev = pci_get_drvdata(pdev);
struct uio_info *uio = &poch_dev->uio;
unsigned int minor = MINOR(poch_dev->cdev.dev);
unsigned int id = minor / poch_dev->nchannels;
poch_class_dev_unregister(poch_dev, id);
cdev_del(&poch_dev->cdev);
idr_remove(&poch_ids, id);
free_irq(pdev->irq, poch_dev);
iounmap(poch_dev->fpga_iomem);
iounmap(poch_dev->bridge_iomem);
uio_unregister_device(uio);
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
iounmap(uio->mem[0].internal_addr);
kfree(poch_dev);
}
static const struct pci_device_id poch_pci_ids[] /* __devinitconst */ = {
{ PCI_DEVICE(PCI_VENDOR_ID_RRAPIDS,
PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE) },
{ 0, }
};
static struct pci_driver poch_pci_driver = {
.name = DRV_NAME,
.id_table = poch_pci_ids,
.probe = poch_pci_probe,
.remove = poch_pci_remove,
};
static int __init poch_init_module(void)
{
int ret = 0;
ret = alloc_chrdev_region(&poch_first_dev, 0,
MAX_POCH_DEVICES, DRV_NAME);
if (ret) {
printk(KERN_ERR PFX "error allocating device no.");
return ret;
}
poch_cls = class_create(THIS_MODULE, "pocketchange");
if (IS_ERR(poch_cls)) {
ret = PTR_ERR(poch_cls);
goto out_unreg_chrdev;
}
ret = pci_register_driver(&poch_pci_driver);
if (ret) {
printk(KERN_ERR PFX "error register PCI device");
goto out_class_destroy;
}
return 0;
out_class_destroy:
class_destroy(poch_cls);
out_unreg_chrdev:
unregister_chrdev_region(poch_first_dev, MAX_POCH_DEVICES);
return ret;
}
static void __exit poch_exit_module(void)
{
pci_unregister_driver(&poch_pci_driver);
class_destroy(poch_cls);
unregister_chrdev_region(poch_first_dev, MAX_POCH_DEVICES);
}
module_init(poch_init_module);
module_exit(poch_exit_module);
MODULE_LICENSE("GPL v2");
drivers/staging/poch/poch.h deleted 100644 → 0
View file @ 24d2d8be
/*
* User-space DMA and UIO based Redrapids Pocket Change CardBus driver
*
* Copyright 2008 Vijay Kumar <vijaykumar@bravegnu.org>
*
* Part of userspace API. Should be moved to a header file in
* include/linux for final version.
*
*/
#include <linux/types.h>
struct poch_counters {
__u32 fifo_empty;
__u32 fifo_overflow;
__u32 pll_unlock;
};
struct poch_consume {
__u32 __user *offsets;
__u32 nfetch;
__u32 nflush;
};
#define POCH_IOC_NUM '9'
#define POCH_IOC_TRANSFER_START _IO(POCH_IOC_NUM, 0)
#define POCH_IOC_TRANSFER_STOP _IO(POCH_IOC_NUM, 1)
#define POCH_IOC_GET_COUNTERS _IOR(POCH_IOC_NUM, 2, \
struct poch_counters)
#define POCH_IOC_SYNC_GROUP_FOR_USER _IO(POCH_IOC_NUM, 3)
#define POCH_IOC_SYNC_GROUP_FOR_DEVICE _IO(POCH_IOC_NUM, 4)
#define POCH_IOC_CONSUME _IOWR(POCH_IOC_NUM, 5, \
struct poch_consume)
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