[PATCH] dvb: b2c2/flexcop driver refactoring part 2: add modular Flexcop driver

b2c2/flexcop driver refactoring to support PCI and USB based cards part 2: add
modular Flexcop driver

Signed-off-by: Patrick Boettcher <pb@linuxtv.org>
Signed-off-by: Johannes Stezenbach <js@linuxtv.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 365 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 000000000000..693af41f3370
--- /dev/null
+++ b/drivers/media/dvb/b2c2/flexcop-pci.c
@@ -0,0 +1,365 @@
+/*
+ * This file is part of 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 = 0;
+module_param(enable_pid_filtering, int, 0444);
+MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1");
+
+#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)
+
+static int debug = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS);
+
+#define DRIVER_VERSION "0.1"
+#define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver"
+#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 is 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 occured */
+
+        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;
+}
+
+/* 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_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct flexcop_pci *fc_pci = dev_id;
+        struct flexcop_device *fc = fc_pci->fc_dev;
+        flexcop_ibi_value v = fc->read_ibi_reg(fc,irq_20c);
+
+        deb_irq("irq: %08x cur_addr: %08x (%d), our addrs. 1: %08x 2: %08x; 0x000: "
+                        "%08x, 0x00c: %08x\n",v.raw,
+                        fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2,
+                        fc_pci->active_dma1_addr,
+                        fc_pci->dma[0].dma_addr0,fc_pci->dma[0].dma_addr1,
+                        fc->read_ibi_reg(fc,dma1_000).raw,
+                        fc->read_ibi_reg(fc,dma1_00c).raw);
+
+        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;
+        } else if (v.irq_20c.DMA1_Timer_Status == 1) {
+                /* 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 */
+                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;
+
+                /* 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) {
+                        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 - 1) - fc_pci->last_dma1_cur_pos);
+                        fc_pci->last_dma1_cur_pos = 0;
+                }
+
+                if (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);
+                }
+
+                fc_pci->last_dma1_cur_pos = cur_pos;
+        }
+
+/* packet count would be ideal for hw filtering, but it isn't working. Either
+ * the data book is wrong, or I'm unable to read it correctly */
+
+/*      if (v.irq_20c.DMA1_Size_IRQ_Status == 1) { packet counter */
+
+        return IRQ_HANDLED;
+}
+
+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,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1);
+                flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1);
+                flexcop_dma_config_timer(fc,FC_DMA_1,1);
+
+                if (fc_pci->fc_dev->pid_filtering) {
+                        fc_pci->last_dma1_cur_pos = 0;
+                        flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
+                } else {
+                        fc_pci->active_dma1_addr = 0;
+                        flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
+                }
+
+/*              flexcop_dma_config_packet_count(fc,FC_DMA_1,0xc0);
+                flexcop_dma_control_packet_irq(fc,FC_DMA_1,1); */
+
+                deb_irq("irqs enabled\n");
+        } else {
+                if (fc_pci->fc_dev->pid_filtering)
+                        flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
+                else
+                        flexcop_dma_control_size_irq(fc,FC_DMA_1,0);
+
+//              flexcop_dma_control_packet_irq(fc,FC_DMA_1,0);
+                deb_irq("irqs disabled\n");
+        }
+
+        return 0;
+}
+
+static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
+{
+        int ret;
+        if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
+                return ret;
+
+        if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0)
+                goto dma1_free;
+
+        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;
+        goto success;
+dma1_free:
+        flexcop_dma_free(&fc_pci->dma[0]);
+
+success:
+        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;
+        u8 card_rev;
+
+        pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev);
+        info("card revision %x", card_rev);
+
+        if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
+                return ret;
+
+        pci_set_master(fc_pci->pdev);
+
+        /* enable interrupts */
+        // pci_write_config_dword(pdev, 0x6c, 0x8000);
+
+        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);
+
+        if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_irq,
+                                        SA_SHIRQ, DRIVER_NAME, fc_pci)) != 0)
+                goto err_pci_iounmap;
+
+        fc_pci->init_state |= FC_PCI_INIT;
+        goto success;
+
+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);
+
+success:
+        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;
+
+        fc->pid_filtering = enable_pid_filtering;
+        fc->bus_type = FC_PCI;
+
+        fc->dev = &pdev->dev;
+
+/* 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;
+
+        goto success;
+err_fc_exit:
+        flexcop_device_exit(fc);
+err_pci_exit:
+        flexcop_pci_exit(fc_pci);
+err_kfree:
+        flexcop_device_kfree(fc);
+success:
+        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);
+
+        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) },
+/*      { PCI_DEVICE(0x13d0, 0x2200) }, PCI FlexCopIII ? */
+        { },
+};
+
+MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
+
+static struct pci_driver flexcop_pci_driver = {
+        .name = "Technisat/B2C2 FlexCop II/IIb/III 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");