1 files changed, 450 insertions, 0 deletions

diff --git a/drivers/media/dvb/b2c2/flexcop-pci.c b/drivers/media/dvb/b2c2/flexcop-pci.c
new file mode 100644
index 00000000000..44f8fb5f17f
--- /dev/null
+++ b/drivers/media/dvb/b2c2/flexcop-pci.c
@@ -0,0 +1,450 @@
+/*
+ * Linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
+ * flexcop-pci.c - covers the PCI part including DMA transfers
+ * see flexcop.c for copyright information
+ */
+
+#define FC_LOG_PREFIX "flexcop-pci"
+#include "flexcop-common.h"
+
+static int enable_pid_filtering = 1;
+module_param(enable_pid_filtering, int, 0444);
+MODULE_PARM_DESC(enable_pid_filtering,
+        "enable hardware pid filtering: supported values: 0 (fullts), 1");
+
+static int irq_chk_intv = 100;
+module_param(irq_chk_intv, int, 0644);
+MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ streaming watchdog.");
+
+#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
+#define dprintk(level,args...) \
+        do { if ((debug & level)) printk(args); } while (0)
+#define DEBSTATUS ""
+#else
+#define dprintk(level,args...)
+#define DEBSTATUS " (debugging is not enabled)"
+#endif
+
+#define deb_info(args...) dprintk(0x01, args)
+#define deb_reg(args...) dprintk(0x02, args)
+#define deb_ts(args...) dprintk(0x04, args)
+#define deb_irq(args...) dprintk(0x08, args)
+#define deb_chk(args...) dprintk(0x10, args)
+
+static int debug;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,
+        "set debug level (1=info,2=regs,4=TS,8=irqdma,16=check (|-able))."
+        DEBSTATUS);
+
+#define DRIVER_VERSION "0.1"
+#define DRIVER_NAME "flexcop-pci"
+#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"
+
+struct flexcop_pci {
+        struct pci_dev *pdev;
+
+#define FC_PCI_INIT     0x01
+#define FC_PCI_DMA_INIT 0x02
+        int init_state;
+
+        void __iomem *io_mem;
+        u32 irq;
+        /* buffersize (at least for DMA1, need to be % 188 == 0,
+         * this logic is required */
+#define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188)
+#define FC_DEFAULT_DMA2_BUFSIZE (10 * 188)
+        struct flexcop_dma dma[2];
+
+        int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */
+        u32 last_dma1_cur_pos;
+        /* position of the pointer last time the timer/packet irq occurred */
+        int count;
+        int count_prev;
+        int stream_problem;
+
+        spinlock_t irq_lock;
+        unsigned long last_irq;
+
+        struct delayed_work irq_check_work;
+        struct flexcop_device *fc_dev;
+};
+
+static int lastwreg, lastwval, lastrreg, lastrval;
+
+static flexcop_ibi_value flexcop_pci_read_ibi_reg(struct flexcop_device *fc,
+                flexcop_ibi_register r)
+{
+        struct flexcop_pci *fc_pci = fc->bus_specific;
+        flexcop_ibi_value v;
+        v.raw = readl(fc_pci->io_mem + r);
+
+        if (lastrreg != r || lastrval != v.raw) {
+                lastrreg = r; lastrval = v.raw;
+                deb_reg("new rd: %3x: %08x\n", r, v.raw);
+        }
+
+        return v;
+}
+
+static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc,
+                flexcop_ibi_register r, flexcop_ibi_value v)
+{
+        struct flexcop_pci *fc_pci = fc->bus_specific;
+
+        if (lastwreg != r || lastwval != v.raw) {
+                lastwreg = r; lastwval = v.raw;
+                deb_reg("new wr: %3x: %08x\n", r, v.raw);
+        }
+
+        writel(v.raw, fc_pci->io_mem + r);
+        return 0;
+}
+
+static void flexcop_pci_irq_check_work(struct work_struct *work)
+{
+        struct flexcop_pci *fc_pci =
+                container_of(work, struct flexcop_pci, irq_check_work.work);
+        struct flexcop_device *fc = fc_pci->fc_dev;
+
+        if (fc->feedcount) {
+
+                if (fc_pci->count == fc_pci->count_prev) {
+                        deb_chk("no IRQ since the last check\n");
+                        if (fc_pci->stream_problem++ == 3) {
+                                struct dvb_demux_feed *feed;
+                                deb_info("flexcop-pci: stream problem, resetting pid filter\n");
+
+                                spin_lock_irq(&fc->demux.lock);
+                                list_for_each_entry(feed, &fc->demux.feed_list,
+                                                list_head) {
+                                        flexcop_pid_feed_control(fc, feed, 0);
+                                }
+
+                                list_for_each_entry(feed, &fc->demux.feed_list,
+                                                list_head) {
+                                        flexcop_pid_feed_control(fc, feed, 1);
+                                }
+                                spin_unlock_irq(&fc->demux.lock);
+
+                                fc_pci->stream_problem = 0;
+                        }
+                } else {
+                        fc_pci->stream_problem = 0;
+                        fc_pci->count_prev = fc_pci->count;
+                }
+        }
+
+        schedule_delayed_work(&fc_pci->irq_check_work,
+                        msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
+}
+
+/* When PID filtering is turned on, we use the timer IRQ, because small amounts
+ * of data need to be passed to the user space instantly as well. When PID
+ * filtering is turned off, we use the page-change-IRQ */
+static irqreturn_t flexcop_pci_isr(int irq, void *dev_id)
+{
+        struct flexcop_pci *fc_pci = dev_id;
+        struct flexcop_device *fc = fc_pci->fc_dev;
+        unsigned long flags;
+        flexcop_ibi_value v;
+        irqreturn_t ret = IRQ_HANDLED;
+
+        spin_lock_irqsave(&fc_pci->irq_lock, flags);
+        v = fc->read_ibi_reg(fc, irq_20c);
+
+        /* errors */
+        if (v.irq_20c.Data_receiver_error)
+                deb_chk("data receiver error\n");
+        if (v.irq_20c.Continuity_error_flag)
+                deb_chk("Contunuity error flag is set\n");
+        if (v.irq_20c.LLC_SNAP_FLAG_set)
+                deb_chk("LLC_SNAP_FLAG_set is set\n");
+        if (v.irq_20c.Transport_Error)
+                deb_chk("Transport error\n");
+
+        if ((fc_pci->count % 1000) == 0)
+                deb_chk("%d valid irq took place so far\n", fc_pci->count);
+
+        if (v.irq_20c.DMA1_IRQ_Status == 1) {
+                if (fc_pci->active_dma1_addr == 0)
+                        flexcop_pass_dmx_packets(fc_pci->fc_dev,
+                                        fc_pci->dma[0].cpu_addr0,
+                                        fc_pci->dma[0].size / 188);
+                else
+                        flexcop_pass_dmx_packets(fc_pci->fc_dev,
+                                        fc_pci->dma[0].cpu_addr1,
+                                        fc_pci->dma[0].size / 188);
+
+                deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
+                fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
+                /* for the timer IRQ we only can use buffer dmx feeding, because we don't have
+                 * complete TS packets when reading from the DMA memory */
+        } else if (v.irq_20c.DMA1_Timer_Status == 1) {
+                dma_addr_t cur_addr =
+                        fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
+                u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
+
+                deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, "
+                        "last_cur_pos: %08x ",
+                                jiffies_to_usecs(jiffies - fc_pci->last_irq),
+                                v.raw, (unsigned long long)cur_addr, cur_pos,
+                                fc_pci->last_dma1_cur_pos);
+                fc_pci->last_irq = jiffies;
+
+                /* buffer end was reached, restarted from the beginning
+                 * pass the data from last_cur_pos to the buffer end to the demux
+                 */
+                if (cur_pos < fc_pci->last_dma1_cur_pos) {
+                        deb_irq(" end was reached: passing %d bytes ",
+                                (fc_pci->dma[0].size*2 - 1) -
+                                fc_pci->last_dma1_cur_pos);
+                        flexcop_pass_dmx_data(fc_pci->fc_dev,
+                                fc_pci->dma[0].cpu_addr0 +
+                                        fc_pci->last_dma1_cur_pos,
+                                (fc_pci->dma[0].size*2) -
+                                        fc_pci->last_dma1_cur_pos);
+                        fc_pci->last_dma1_cur_pos = 0;
+                }
+
+                if (cur_pos > fc_pci->last_dma1_cur_pos) {
+                        deb_irq(" passing %d bytes ",
+                                cur_pos - fc_pci->last_dma1_cur_pos);
+                        flexcop_pass_dmx_data(fc_pci->fc_dev,
+                                fc_pci->dma[0].cpu_addr0 +
+                                        fc_pci->last_dma1_cur_pos,
+                                cur_pos - fc_pci->last_dma1_cur_pos);
+                }
+                deb_irq("\n");
+
+                fc_pci->last_dma1_cur_pos = cur_pos;
+                fc_pci->count++;
+        } else {
+                deb_irq("isr for flexcop called, "
+                        "apparently without reason (%08x)\n", v.raw);
+                ret = IRQ_NONE;
+        }
+
+        spin_unlock_irqrestore(&fc_pci->irq_lock, flags);
+        return ret;
+}
+
+static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
+{
+        struct flexcop_pci *fc_pci = fc->bus_specific;
+        if (onoff) {
+                flexcop_dma_config(fc, &fc_pci->dma[0], FC_DMA_1);
+                flexcop_dma_config(fc, &fc_pci->dma[1], FC_DMA_2);
+                flexcop_dma_config_timer(fc, FC_DMA_1, 0);
+                flexcop_dma_xfer_control(fc, FC_DMA_1,
+                                FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 1);
+                deb_irq("DMA xfer enabled\n");
+
+                fc_pci->last_dma1_cur_pos = 0;
+                flexcop_dma_control_timer_irq(fc, FC_DMA_1, 1);
+                deb_irq("IRQ enabled\n");
+                fc_pci->count_prev = fc_pci->count;
+        } else {
+                flexcop_dma_control_timer_irq(fc, FC_DMA_1, 0);
+                deb_irq("IRQ disabled\n");
+
+                flexcop_dma_xfer_control(fc, FC_DMA_1,
+                         FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1, 0);
+                deb_irq("DMA xfer disabled\n");
+        }
+        return 0;
+}
+
+static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
+{
+        int ret;
+        ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[0],
+                        FC_DEFAULT_DMA1_BUFSIZE);
+        if (ret != 0)
+                return ret;
+
+        ret = flexcop_dma_allocate(fc_pci->pdev, &fc_pci->dma[1],
+                        FC_DEFAULT_DMA2_BUFSIZE);
+        if (ret != 0) {
+                flexcop_dma_free(&fc_pci->dma[0]);
+                return ret;
+        }
+
+        flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_MEDIA |
+                        FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
+        flexcop_sram_set_dest(fc_pci->fc_dev, FC_SRAM_DEST_CAO |
+                        FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
+        fc_pci->init_state |= FC_PCI_DMA_INIT;
+        return ret;
+}
+
+static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
+{
+        if (fc_pci->init_state & FC_PCI_DMA_INIT) {
+                flexcop_dma_free(&fc_pci->dma[0]);
+                flexcop_dma_free(&fc_pci->dma[1]);
+        }
+        fc_pci->init_state &= ~FC_PCI_DMA_INIT;
+}
+
+static int flexcop_pci_init(struct flexcop_pci *fc_pci)
+{
+        int ret;
+
+        info("card revision %x", fc_pci->pdev->revision);
+
+        if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
+                return ret;
+        pci_set_master(fc_pci->pdev);
+
+        if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
+                goto err_pci_disable_device;
+
+        fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);
+
+        if (!fc_pci->io_mem) {
+                err("cannot map io memory\n");
+                ret = -EIO;
+                goto err_pci_release_regions;
+        }
+
+        pci_set_drvdata(fc_pci->pdev, fc_pci);
+        spin_lock_init(&fc_pci->irq_lock);
+        if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
+                                        IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
+                goto err_pci_iounmap;
+
+        fc_pci->init_state |= FC_PCI_INIT;
+        return ret;
+
+err_pci_iounmap:
+        pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
+        pci_set_drvdata(fc_pci->pdev, NULL);
+err_pci_release_regions:
+        pci_release_regions(fc_pci->pdev);
+err_pci_disable_device:
+        pci_disable_device(fc_pci->pdev);
+        return ret;
+}
+
+static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
+{
+        if (fc_pci->init_state & FC_PCI_INIT) {
+                free_irq(fc_pci->pdev->irq, fc_pci);
+                pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
+                pci_set_drvdata(fc_pci->pdev, NULL);
+                pci_release_regions(fc_pci->pdev);
+                pci_disable_device(fc_pci->pdev);
+        }
+        fc_pci->init_state &= ~FC_PCI_INIT;
+}
+
+static int flexcop_pci_probe(struct pci_dev *pdev,
+                const struct pci_device_id *ent)
+{
+        struct flexcop_device *fc;
+        struct flexcop_pci *fc_pci;
+        int ret = -ENOMEM;
+
+        if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
+                err("out of memory\n");
+                return -ENOMEM;
+        }
+
+        /* general flexcop init */
+        fc_pci = fc->bus_specific;
+        fc_pci->fc_dev = fc;
+
+        fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
+        fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
+        fc->i2c_request = flexcop_i2c_request;
+        fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
+        fc->stream_control = flexcop_pci_stream_control;
+
+        if (enable_pid_filtering)
+                info("will use the HW PID filter.");
+        else
+                info("will pass the complete TS to the demuxer.");
+
+        fc->pid_filtering = enable_pid_filtering;
+        fc->bus_type = FC_PCI;
+        fc->dev = &pdev->dev;
+        fc->owner = THIS_MODULE;
+
+        /* bus specific part */
+        fc_pci->pdev = pdev;
+        if ((ret = flexcop_pci_init(fc_pci)) != 0)
+                goto err_kfree;
+
+        /* init flexcop */
+        if ((ret = flexcop_device_initialize(fc)) != 0)
+                goto err_pci_exit;
+
+        /* init dma */
+        if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
+                goto err_fc_exit;
+
+        INIT_DELAYED_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work);
+
+        if (irq_chk_intv > 0)
+                schedule_delayed_work(&fc_pci->irq_check_work,
+                                msecs_to_jiffies(irq_chk_intv < 100 ?
+                                        100 :
+                                        irq_chk_intv));
+        return ret;
+
+err_fc_exit:
+        flexcop_device_exit(fc);
+err_pci_exit:
+        flexcop_pci_exit(fc_pci);
+err_kfree:
+        flexcop_device_kfree(fc);
+        return ret;
+}
+
+/* in theory every _exit function should be called exactly two times,
+ * here and in the bail-out-part of the _init-function
+ */
+static void flexcop_pci_remove(struct pci_dev *pdev)
+{
+        struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
+
+        if (irq_chk_intv > 0)
+                cancel_delayed_work(&fc_pci->irq_check_work);
+
+        flexcop_pci_dma_exit(fc_pci);
+        flexcop_device_exit(fc_pci->fc_dev);
+        flexcop_pci_exit(fc_pci);
+        flexcop_device_kfree(fc_pci->fc_dev);
+}
+
+static struct pci_device_id flexcop_pci_tbl[] = {
+        { PCI_DEVICE(0x13d0, 0x2103) },
+        { },
+};
+
+MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
+
+static struct pci_driver flexcop_pci_driver = {
+        .name     = "b2c2_flexcop_pci",
+        .id_table = flexcop_pci_tbl,
+        .probe    = flexcop_pci_probe,
+        .remove   = flexcop_pci_remove,
+};
+
+static int __init flexcop_pci_module_init(void)
+{
+        return pci_register_driver(&flexcop_pci_driver);
+}
+
+static void __exit flexcop_pci_module_exit(void)
+{
+        pci_unregister_driver(&flexcop_pci_driver);
+}
+
+module_init(flexcop_pci_module_init);
+module_exit(flexcop_pci_module_exit);
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_NAME);
+MODULE_LICENSE("GPL");