--- /dev/null
+/*
+ * 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 "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_ADC_CTL_REG 0x214
+#define FPGA_RX_ADC_CTL_CONT_CAP (0x0)
+#define FPGA_RX_ADC_CTL_SNAP_CAP (0x1)
+
+#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;
+ struct poch_cbuf_header *header;
+ struct page *header_pg;
+ unsigned long header_size;
+
+ /* 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 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 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 header_pages;
+ unsigned long total_group_pages;
+
+ /* FIXME: We do not have to add 1, if group_size a multiple of
+ PAGE_SIZE. */
+ group_pages = (channel->group_size / PAGE_SIZE) + 1;
+ header_pages = (channel->header_size / PAGE_SIZE) + 1;
+ total_group_pages = group_pages * channel->group_count;
+
+ mmap_size = (header_pages + 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;
+ unsigned long header_pages;
+
+ group_pages = (channel->group_size / PAGE_SIZE) + 1;
+ header_pages = (channel->header_size / PAGE_SIZE) + 1;
+
+ 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 =
+ (header_pages + (i * group_pages)) * PAGE_SIZE;
+
+ printk(KERN_INFO PFX "%ld: user_offset: 0x%lx dma: 0x%x\n", i,
+ group->user_offset, group->dma_addr);
+ }
+
+ return 0;
+}
+
+static void 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);
+}
+
+/*
+ * 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");
+ iowrite32(channel->block_size, 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(1, 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.
+ */
+ spin_lock(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);
+
+ iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG);
+ iowrite32(channel->groups[i].dma_addr, fpga + group_reg);
+ }
+ 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);
+
+ 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 int poch_channel_alloc_header(struct channel_info *channel)
+{
+ struct poch_cbuf_header *header = channel->header;
+ unsigned long group_offset_size;
+ unsigned long tot_group_offsets_size;
+
+ /* Allocate memory to hold header exported userspace */
+ group_offset_size = sizeof(header->group_offsets[0]);
+ tot_group_offsets_size = group_offset_size * channel->group_count;
+ channel->header_size = sizeof(*header) + tot_group_offsets_size;
+ channel->header_pg = alloc_pages(GFP_KERNEL | __GFP_ZERO,
+ get_order(channel->header_size));
+ if (!channel->header_pg)
+ return -ENOMEM;
+
+ channel->header = page_address(channel->header_pg);
+
+ return 0;
+}
+
+static void poch_channel_free_header(struct channel_info *channel)
+{
+ unsigned int order;
+
+ order = get_order(channel->header_size);
+ __free_pages(channel->header_pg, order);
+}
+
+static void poch_channel_init_header(struct channel_info *channel)
+{
+ int i;
+ struct poch_group_info *groups;
+ s32 *group_offsets;
+
+ channel->header->group_size_bytes = channel->group_size;
+ channel->header->group_count = channel->group_count;
+
+ spin_lock_init(&channel->group_offsets_lock);
+
+ group_offsets = channel->header->group_offsets;
+ groups = channel->groups;
+
+ for (i = 0; i < channel->group_count; i++) {
+ if (channel->dir == CHANNEL_DIR_RX)
+ group_offsets[i] = -1;
+ else
+ group_offsets[i] = groups[i].user_offset;
+ }
+}
+
+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");
+
+ channel_latch_attr(channel);
+
+ 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;
+ }
+
+ ret = poch_channel_alloc_header(channel);
+ if (ret) {
+ dev_err(dev, "error allocating user space header\n");
+ goto out_free_groups;
+ }
+
+ 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);
+
+ printk(KERN_WARNING "poch_channel_init_header\n");
+
+ poch_channel_init_header(channel);
+
+ return 0;
+
+ out_free_groups:
+ poch_channel_free_groups(channel);
+ 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. */
+ iowrite32(FPGA_TX_CTL_FIFO_FLUSH
+ | FPGA_TX_CTL_OUTPUT_CARDBUS,
+ fpga + FPGA_TX_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_header(channel);
+ poch_channel_free_groups(channel);
+ kfree(channel->groups);
+ atomic_inc(&channel->free);
+
+ return 0;
+}
+
+/*
+ * Map the header and 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 header_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 = (channel->group_size / PAGE_SIZE) + 1;
+ header_pages = (channel->header_size / PAGE_SIZE) + 1;
+ total_group_pages = group_pages * channel->group_count;
+
+ size = vma->vm_end - vma->vm_start;
+ if (size != (header_pages + total_group_pages) * PAGE_SIZE) {
+ printk(KERN_WARNING PFX "required %lu bytes\n", size);
+ return -EINVAL;
+ }
+
+ start = vma->vm_start;
+
+ /* FIXME: Cleanup required on failure? */
+ pg = channel->header_pg;
+ for (pg_num = 0; pg_num < header_pages; pg_num++, pg++) {
+ printk(KERN_DEBUG PFX "page_count: %d\n", page_count(pg));
+ printk(KERN_DEBUG PFX "%d: header: 0x%lx\n", pg_num, start);
+ ret = vm_insert_page(vma, start, pg);
+ if (ret) {
+ printk(KERN_DEBUG "vm_insert 1 failed at %lx\n", start);
+ return ret;
+ }
+ start += PAGE_SIZE;
+ }
+
+ 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 i;
+
+ spin_lock_irq(&channel->group_offsets_lock);
+
+ for (i = 0; i < channel->group_count; i++) {
+ if (channel->dir == CHANNEL_DIR_RX
+ && channel->header->group_offsets[i] == -1) {
+ spin_unlock_irq(&channel->group_offsets_lock);
+ return 1;
+ }
+
+ if (channel->dir == CHANNEL_DIR_TX
+ && channel->header->group_offsets[i] != -1) {
+ spin_unlock_irq(&channel->group_offsets_lock);
+ return 1;
+ }
+ }
+
+ spin_unlock_irq(&channel->group_offsets_lock);
+
+ return 0;
+}
+
+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_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;
+ s32 *group_offsets;
+ 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;
+
+ group_offsets = channel->header->group_offsets;
+ groups = channel->groups;
+
+ spin_lock(&channel->group_offsets_lock);
+
+ for (i = 0; i < groups_done; i++) {
+ j = (prev_transfer + i) % channel->group_count;
+ if (channel->dir == CHANNEL_DIR_RX)
+ group_offsets[j] = -1;
+ else
+ group_offsets[j] = groups[j].user_offset;
+ }
+
+ spin_unlock(&channel->group_offsets_lock);
+
+ channel->transfer = curr_transfer;
+
+ 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->bus_id, 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;
+
+ /* FIXME: unmap fpga_iomem and bridge_iomem */
+
+ poch_class_dev_unregister(poch_dev, id);
+ cdev_del(&poch_dev->cdev);
+ idr_remove(&poch_ids, id);
+ free_irq(pdev->irq, poch_dev);
+ 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");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff