drivers/media/pci/netup_unidvb/netup_unidvb_core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * netup_unidvb_core.c
   4  *
   5  * Main module for NetUP Universal Dual DVB-CI
   6  *
   7  * Copyright (C) 2014 NetUP Inc.
   8  * Copyright (C) 2014 Sergey Kozlov <[email protected]>
   9  * Copyright (C) 2014 Abylay Ospan <[email protected]>
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/kmod.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/delay.h>
  20 #include <linux/list.h>
  21 #include <media/videobuf2-v4l2.h>
  22 #include <media/videobuf2-vmalloc.h>
  23
  24 #include "netup_unidvb.h"
  25 #include "cxd2841er.h"
  26 #include "horus3a.h"
  27 #include "ascot2e.h"
  28 #include "helene.h"
  29 #include "lnbh25.h"
  30
  31 static int spi_enable;
  32 module_param(spi_enable, int, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
  33
  34 MODULE_DESCRIPTION("Driver for NetUP Dual Universal DVB CI PCIe card");
  35 MODULE_AUTHOR("[email protected]");
  36 MODULE_VERSION(NETUP_UNIDVB_VERSION);
  37 MODULE_LICENSE("GPL");
  38
  39 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  40
  41 /* Avalon-MM PCI-E registers */
  42 #define AVL_PCIE_IENR           0x50
  43 #define AVL_PCIE_ISR            0x40
  44 #define AVL_IRQ_ENABLE          0x80
  45 #define AVL_IRQ_ASSERTED        0x80
  46 /* GPIO registers */
  47 #define GPIO_REG_IO             0x4880
  48 #define GPIO_REG_IO_TOGGLE      0x4882
  49 #define GPIO_REG_IO_SET         0x4884
  50 #define GPIO_REG_IO_CLEAR       0x4886
  51 /* GPIO bits */
  52 #define GPIO_FEA_RESET          (1 << 0)
  53 #define GPIO_FEB_RESET          (1 << 1)
  54 #define GPIO_RFA_CTL            (1 << 2)
  55 #define GPIO_RFB_CTL            (1 << 3)
  56 #define GPIO_FEA_TU_RESET       (1 << 4)
  57 #define GPIO_FEB_TU_RESET       (1 << 5)
  58 /* DMA base address */
  59 #define NETUP_DMA0_ADDR         0x4900
  60 #define NETUP_DMA1_ADDR         0x4940
  61 /* 8 DMA blocks * 128 packets * 188 bytes*/
  62 #define NETUP_DMA_BLOCKS_COUNT  8
  63 #define NETUP_DMA_PACKETS_COUNT 128
  64 /* DMA status bits */
  65 #define BIT_DMA_RUN             1
  66 #define BIT_DMA_ERROR           2
  67 #define BIT_DMA_IRQ             0x200
  68
  69 /**
  70  * struct netup_dma_regs - the map of DMA module registers
  71  * @ctrlstat_set:       Control register, write to set control bits
  72  * @ctrlstat_clear:     Control register, write to clear control bits
  73  * @start_addr_lo:      DMA ring buffer start address, lower part
  74  * @start_addr_hi:      DMA ring buffer start address, higher part
  75  * @size:               DMA ring buffer size register
  76  *                      * Bits [0-7]:   DMA packet size, 188 bytes
  77  *                      * Bits [16-23]: packets count in block, 128 packets
  78  *                      * Bits [24-31]: blocks count, 8 blocks
  79  * @timeout:            DMA timeout in units of 8ns
  80  *                      For example, value of 375000000 equals to 3 sec
  81  * @curr_addr_lo:       Current ring buffer head address, lower part
  82  * @curr_addr_hi:       Current ring buffer head address, higher part
  83  * @stat_pkt_received:  Statistic register, not tested
  84  * @stat_pkt_accepted:  Statistic register, not tested
  85  * @stat_pkt_overruns:  Statistic register, not tested
  86  * @stat_pkt_underruns: Statistic register, not tested
  87  * @stat_fifo_overruns: Statistic register, not tested
  88  */
  89 struct netup_dma_regs {
  90         __le32  ctrlstat_set;
  91         __le32  ctrlstat_clear;
  92         __le32  start_addr_lo;
  93         __le32  start_addr_hi;
  94         __le32  size;
  95         __le32  timeout;
  96         __le32  curr_addr_lo;
  97         __le32  curr_addr_hi;
  98         __le32  stat_pkt_received;
  99         __le32  stat_pkt_accepted;
 100         __le32  stat_pkt_overruns;
 101         __le32  stat_pkt_underruns;
 102         __le32  stat_fifo_overruns;
 103 } __packed __aligned(1);
 104
 105 struct netup_unidvb_buffer {
 106         struct vb2_v4l2_buffer vb;
 107         struct list_head        list;
 108         u32                     size;
 109 };
 110
 111 static int netup_unidvb_tuner_ctrl(void *priv, int is_dvb_tc);
 112 static void netup_unidvb_queue_cleanup(struct netup_dma *dma);
 113
 114 static struct cxd2841er_config demod_config = {
 115         .i2c_addr = 0xc8,
 116         .xtal = SONY_XTAL_24000,
 117         .flags = CXD2841ER_USE_GATECTRL | CXD2841ER_ASCOT
 118 };
 119
 120 static struct horus3a_config horus3a_conf = {
 121         .i2c_address = 0xc0,
 122         .xtal_freq_mhz = 16,
 123         .set_tuner_callback = netup_unidvb_tuner_ctrl
 124 };
 125
 126 static struct ascot2e_config ascot2e_conf = {
 127         .i2c_address = 0xc2,
 128         .set_tuner_callback = netup_unidvb_tuner_ctrl
 129 };
 130
 131 static struct helene_config helene_conf = {
 132         .i2c_address = 0xc0,
 133         .xtal = SONY_HELENE_XTAL_24000,
 134         .set_tuner_callback = netup_unidvb_tuner_ctrl
 135 };
 136
 137 static struct lnbh25_config lnbh25_conf = {
 138         .i2c_address = 0x10,
 139         .data2_config = LNBH25_TEN | LNBH25_EXTM
 140 };
 141
 142 static int netup_unidvb_tuner_ctrl(void *priv, int is_dvb_tc)
 143 {
 144         u8 reg, mask;
 145         struct netup_dma *dma = priv;
 146         struct netup_unidvb_dev *ndev;
 147
 148         if (!priv)
 149                 return -EINVAL;
 150         ndev = dma->ndev;
 151         dev_dbg(&ndev->pci_dev->dev, "%s(): num %d is_dvb_tc %d\n",
 152                 __func__, dma->num, is_dvb_tc);
 153         reg = readb(ndev->bmmio0 + GPIO_REG_IO);
 154         mask = (dma->num == 0) ? GPIO_RFA_CTL : GPIO_RFB_CTL;
 155
 156         /* inverted tuner control in hw rev. 1.4 */
 157         if (ndev->rev == NETUP_HW_REV_1_4)
 158                 is_dvb_tc = !is_dvb_tc;
 159
 160         if (!is_dvb_tc)
 161                 reg |= mask;
 162         else
 163                 reg &= ~mask;
 164         writeb(reg, ndev->bmmio0 + GPIO_REG_IO);
 165         return 0;
 166 }
 167
 168 static void netup_unidvb_dev_enable(struct netup_unidvb_dev *ndev)
 169 {
 170         u16 gpio_reg;
 171
 172         /* enable PCI-E interrupts */
 173         writel(AVL_IRQ_ENABLE, ndev->bmmio0 + AVL_PCIE_IENR);
 174         /* unreset frontends bits[0:1] */
 175         writeb(0x00, ndev->bmmio0 + GPIO_REG_IO);
 176         msleep(100);
 177         gpio_reg =
 178                 GPIO_FEA_RESET | GPIO_FEB_RESET |
 179                 GPIO_FEA_TU_RESET | GPIO_FEB_TU_RESET |
 180                 GPIO_RFA_CTL | GPIO_RFB_CTL;
 181         writeb(gpio_reg, ndev->bmmio0 + GPIO_REG_IO);
 182         dev_dbg(&ndev->pci_dev->dev,
 183                 "%s(): AVL_PCIE_IENR 0x%x GPIO_REG_IO 0x%x\n",
 184                 __func__, readl(ndev->bmmio0 + AVL_PCIE_IENR),
 185                 (int)readb(ndev->bmmio0 + GPIO_REG_IO));
 186
 187 }
 188
 189 static void netup_unidvb_dma_enable(struct netup_dma *dma, int enable)
 190 {
 191         u32 irq_mask = (dma->num == 0 ?
 192                 NETUP_UNIDVB_IRQ_DMA1 : NETUP_UNIDVB_IRQ_DMA2);
 193
 194         dev_dbg(&dma->ndev->pci_dev->dev,
 195                 "%s(): DMA%d enable %d\n", __func__, dma->num, enable);
 196         if (enable) {
 197                 writel(BIT_DMA_RUN, &dma->regs->ctrlstat_set);
 198                 writew(irq_mask, dma->ndev->bmmio0 + REG_IMASK_SET);
 199         } else {
 200                 writel(BIT_DMA_RUN, &dma->regs->ctrlstat_clear);
 201                 writew(irq_mask, dma->ndev->bmmio0 + REG_IMASK_CLEAR);
 202         }
 203 }
 204
 205 static irqreturn_t netup_dma_interrupt(struct netup_dma *dma)
 206 {
 207         u64 addr_curr;
 208         u32 size;
 209         unsigned long flags;
 210         struct device *dev = &dma->ndev->pci_dev->dev;
 211
 212         spin_lock_irqsave(&dma->lock, flags);
 213         addr_curr = ((u64)readl(&dma->regs->curr_addr_hi) << 32) |
 214                 (u64)readl(&dma->regs->curr_addr_lo) | dma->high_addr;
 215         /* clear IRQ */
 216         writel(BIT_DMA_IRQ, &dma->regs->ctrlstat_clear);
 217         /* sanity check */
 218         if (addr_curr < dma->addr_phys ||
 219                         addr_curr > dma->addr_phys +  dma->ring_buffer_size) {
 220                 if (addr_curr != 0) {
 221                         dev_err(dev,
 222                                 "%s(): addr 0x%llx not from 0x%llx:0x%llx\n",
 223                                 __func__, addr_curr, (u64)dma->addr_phys,
 224                                 (u64)(dma->addr_phys + dma->ring_buffer_size));
 225                 }
 226                 goto irq_handled;
 227         }
 228         size = (addr_curr >= dma->addr_last) ?
 229                 (u32)(addr_curr - dma->addr_last) :
 230                 (u32)(dma->ring_buffer_size - (dma->addr_last - addr_curr));
 231         if (dma->data_size != 0) {
 232                 printk_ratelimited("%s(): lost interrupt, data size %d\n",
 233                         __func__, dma->data_size);
 234                 dma->data_size += size;
 235         }
 236         if (dma->data_size == 0 || dma->data_size > dma->ring_buffer_size) {
 237                 dma->data_size = size;
 238                 dma->data_offset = (u32)(dma->addr_last - dma->addr_phys);
 239         }
 240         dma->addr_last = addr_curr;
 241         queue_work(dma->ndev->wq, &dma->work);
 242 irq_handled:
 243         spin_unlock_irqrestore(&dma->lock, flags);
 244         return IRQ_HANDLED;
 245 }
 246
 247 static irqreturn_t netup_unidvb_isr(int irq, void *dev_id)
 248 {
 249         struct pci_dev *pci_dev = (struct pci_dev *)dev_id;
 250         struct netup_unidvb_dev *ndev = pci_get_drvdata(pci_dev);
 251         u32 reg40, reg_isr;
 252         irqreturn_t iret = IRQ_NONE;
 253
 254         /* disable interrupts */
 255         writel(0, ndev->bmmio0 + AVL_PCIE_IENR);
 256         /* check IRQ source */
 257         reg40 = readl(ndev->bmmio0 + AVL_PCIE_ISR);
 258         if ((reg40 & AVL_IRQ_ASSERTED) != 0) {
 259                 /* IRQ is being signaled */
 260                 reg_isr = readw(ndev->bmmio0 + REG_ISR);
 261                 if (reg_isr & NETUP_UNIDVB_IRQ_SPI)
 262                         iret = netup_spi_interrupt(ndev->spi);
 263                 else if (!ndev->old_fw) {
 264                         if (reg_isr & NETUP_UNIDVB_IRQ_I2C0) {
 265                                 iret = netup_i2c_interrupt(&ndev->i2c[0]);
 266                         } else if (reg_isr & NETUP_UNIDVB_IRQ_I2C1) {
 267                                 iret = netup_i2c_interrupt(&ndev->i2c[1]);
 268                         } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA1) {
 269                                 iret = netup_dma_interrupt(&ndev->dma[0]);
 270                         } else if (reg_isr & NETUP_UNIDVB_IRQ_DMA2) {
 271                                 iret = netup_dma_interrupt(&ndev->dma[1]);
 272                         } else if (reg_isr & NETUP_UNIDVB_IRQ_CI) {
 273                                 iret = netup_ci_interrupt(ndev);
 274                         } else {
 275                                 goto err;
 276                         }
 277                 } else {
 278 err:
 279                         dev_err(&pci_dev->dev,
 280                                 "%s(): unknown interrupt 0x%x\n",
 281                                 __func__, reg_isr);
 282                 }
 283         }
 284         /* re-enable interrupts */
 285         writel(AVL_IRQ_ENABLE, ndev->bmmio0 + AVL_PCIE_IENR);
 286         return iret;
 287 }
 288
 289 static int netup_unidvb_queue_setup(struct vb2_queue *vq,
 290                                     unsigned int *nbuffers,
 291                                     unsigned int *nplanes,
 292                                     unsigned int sizes[],
 293                                     struct device *alloc_devs[])
 294 {
 295         struct netup_dma *dma = vb2_get_drv_priv(vq);
 296         unsigned int q_num_bufs = vb2_get_num_buffers(vq);
 297
 298         dev_dbg(&dma->ndev->pci_dev->dev, "%s()\n", __func__);
 299
 300         *nplanes = 1;
 301         if (q_num_bufs + *nbuffers < VIDEO_MAX_FRAME)
 302                 *nbuffers = VIDEO_MAX_FRAME - q_num_bufs;
 303         sizes[0] = PAGE_ALIGN(NETUP_DMA_PACKETS_COUNT * 188);
 304         dev_dbg(&dma->ndev->pci_dev->dev, "%s() nbuffers=%d sizes[0]=%d\n",
 305                 __func__, *nbuffers, sizes[0]);
 306         return 0;
 307 }
 308
 309 static int netup_unidvb_buf_prepare(struct vb2_buffer *vb)
 310 {
 311         struct netup_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
 312         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 313         struct netup_unidvb_buffer *buf = container_of(vbuf,
 314                                 struct netup_unidvb_buffer, vb);
 315
 316         dev_dbg(&dma->ndev->pci_dev->dev, "%s(): buf 0x%p\n", __func__, buf);
 317         buf->size = 0;
 318         return 0;
 319 }
 320
 321 static void netup_unidvb_buf_queue(struct vb2_buffer *vb)
 322 {
 323         unsigned long flags;
 324         struct netup_dma *dma = vb2_get_drv_priv(vb->vb2_queue);
 325         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
 326         struct netup_unidvb_buffer *buf = container_of(vbuf,
 327                                 struct netup_unidvb_buffer, vb);
 328
 329         dev_dbg(&dma->ndev->pci_dev->dev, "%s(): %p\n", __func__, buf);
 330         spin_lock_irqsave(&dma->lock, flags);
 331         list_add_tail(&buf->list, &dma->free_buffers);
 332         spin_unlock_irqrestore(&dma->lock, flags);
 333         mod_timer(&dma->timeout, jiffies + msecs_to_jiffies(1000));
 334 }
 335
 336 static int netup_unidvb_start_streaming(struct vb2_queue *q, unsigned int count)
 337 {
 338         struct netup_dma *dma = vb2_get_drv_priv(q);
 339
 340         dev_dbg(&dma->ndev->pci_dev->dev, "%s()\n", __func__);
 341         netup_unidvb_dma_enable(dma, 1);
 342         return 0;
 343 }
 344
 345 static void netup_unidvb_stop_streaming(struct vb2_queue *q)
 346 {
 347         struct netup_dma *dma = vb2_get_drv_priv(q);
 348
 349         dev_dbg(&dma->ndev->pci_dev->dev, "%s()\n", __func__);
 350         netup_unidvb_dma_enable(dma, 0);
 351         netup_unidvb_queue_cleanup(dma);
 352 }
 353
 354 static const struct vb2_ops dvb_qops = {
 355         .queue_setup            = netup_unidvb_queue_setup,
 356         .buf_prepare            = netup_unidvb_buf_prepare,
 357         .buf_queue              = netup_unidvb_buf_queue,
 358         .start_streaming        = netup_unidvb_start_streaming,
 359         .stop_streaming         = netup_unidvb_stop_streaming,
 360 };
 361
 362 static int netup_unidvb_queue_init(struct netup_dma *dma,
 363                                    struct vb2_queue *vb_queue)
 364 {
 365         int res;
 366
 367         /* Init videobuf2 queue structure */
 368         vb_queue->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 369         vb_queue->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
 370         vb_queue->drv_priv = dma;
 371         vb_queue->buf_struct_size = sizeof(struct netup_unidvb_buffer);
 372         vb_queue->ops = &dvb_qops;
 373         vb_queue->mem_ops = &vb2_vmalloc_memops;
 374         vb_queue->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
 375         res = vb2_queue_init(vb_queue);
 376         if (res != 0) {
 377                 dev_err(&dma->ndev->pci_dev->dev,
 378                         "%s(): vb2_queue_init failed (%d)\n", __func__, res);
 379         }
 380         return res;
 381 }
 382
 383 static int netup_unidvb_dvb_init(struct netup_unidvb_dev *ndev,
 384                                  int num)
 385 {
 386         int fe_count = 2;
 387         int i = 0;
 388         struct vb2_dvb_frontend *fes[2];
 389         u8 fe_name[32];
 390
 391         if (ndev->rev == NETUP_HW_REV_1_3)
 392                 demod_config.xtal = SONY_XTAL_20500;
 393         else
 394                 demod_config.xtal = SONY_XTAL_24000;
 395
 396         if (num < 0 || num > 1) {
 397                 dev_dbg(&ndev->pci_dev->dev,
 398                         "%s(): unable to init DVB bus %d\n", __func__, num);
 399                 return -ENODEV;
 400         }
 401         mutex_init(&ndev->frontends[num].lock);
 402         INIT_LIST_HEAD(&ndev->frontends[num].felist);
 403
 404         for (i = 0; i < fe_count; i++) {
 405                 if (vb2_dvb_alloc_frontend(&ndev->frontends[num], i+1)
 406                                 == NULL) {
 407                         dev_err(&ndev->pci_dev->dev,
 408                                         "%s(): unable to allocate vb2_dvb_frontend\n",
 409                                         __func__);
 410                         return -ENOMEM;
 411                 }
 412         }
 413
 414         for (i = 0; i < fe_count; i++) {
 415                 fes[i] = vb2_dvb_get_frontend(&ndev->frontends[num], i+1);
 416                 if (fes[i] == NULL) {
 417                         dev_err(&ndev->pci_dev->dev,
 418                                 "%s(): frontends has not been allocated\n",
 419                                 __func__);
 420                         return -EINVAL;
 421                 }
 422         }
 423
 424         for (i = 0; i < fe_count; i++) {
 425                 netup_unidvb_queue_init(&ndev->dma[num], &fes[i]->dvb.dvbq);
 426                 snprintf(fe_name, sizeof(fe_name), "netup_fe%d", i);
 427                 fes[i]->dvb.name = fe_name;
 428         }
 429
 430         fes[0]->dvb.frontend = dvb_attach(cxd2841er_attach_s,
 431                 &demod_config, &ndev->i2c[num].adap);
 432         if (fes[0]->dvb.frontend == NULL) {
 433                 dev_dbg(&ndev->pci_dev->dev,
 434                         "%s(): unable to attach DVB-S/S2 frontend\n",
 435                         __func__);
 436                 goto frontend_detach;
 437         }
 438
 439         if (ndev->rev == NETUP_HW_REV_1_3) {
 440                 horus3a_conf.set_tuner_priv = &ndev->dma[num];
 441                 if (!dvb_attach(horus3a_attach, fes[0]->dvb.frontend,
 442                                         &horus3a_conf, &ndev->i2c[num].adap)) {
 443                         dev_dbg(&ndev->pci_dev->dev,
 444                                         "%s(): unable to attach HORUS3A DVB-S/S2 tuner frontend\n",
 445                                         __func__);
 446                         goto frontend_detach;
 447                 }
 448         } else {
 449                 helene_conf.set_tuner_priv = &ndev->dma[num];
 450                 if (!dvb_attach(helene_attach_s, fes[0]->dvb.frontend,
 451                                         &helene_conf, &ndev->i2c[num].adap)) {
 452                         dev_err(&ndev->pci_dev->dev,
 453                                         "%s(): unable to attach HELENE DVB-S/S2 tuner frontend\n",
 454                                         __func__);
 455                         goto frontend_detach;
 456                 }
 457         }
 458
 459         if (!dvb_attach(lnbh25_attach, fes[0]->dvb.frontend,
 460                         &lnbh25_conf, &ndev->i2c[num].adap)) {
 461                 dev_dbg(&ndev->pci_dev->dev,
 462                         "%s(): unable to attach SEC frontend\n", __func__);
 463                 goto frontend_detach;
 464         }
 465
 466         /* DVB-T/T2 frontend */
 467         fes[1]->dvb.frontend = dvb_attach(cxd2841er_attach_t_c,
 468                 &demod_config, &ndev->i2c[num].adap);
 469         if (fes[1]->dvb.frontend == NULL) {
 470                 dev_dbg(&ndev->pci_dev->dev,
 471                         "%s(): unable to attach Ter frontend\n", __func__);
 472                 goto frontend_detach;
 473         }
 474         fes[1]->dvb.frontend->id = 1;
 475         if (ndev->rev == NETUP_HW_REV_1_3) {
 476                 ascot2e_conf.set_tuner_priv = &ndev->dma[num];
 477                 if (!dvb_attach(ascot2e_attach, fes[1]->dvb.frontend,
 478                                         &ascot2e_conf, &ndev->i2c[num].adap)) {
 479                         dev_dbg(&ndev->pci_dev->dev,
 480                                         "%s(): unable to attach Ter tuner frontend\n",
 481                                         __func__);
 482                         goto frontend_detach;
 483                 }
 484         } else {
 485                 helene_conf.set_tuner_priv = &ndev->dma[num];
 486                 if (!dvb_attach(helene_attach, fes[1]->dvb.frontend,
 487                                         &helene_conf, &ndev->i2c[num].adap)) {
 488                         dev_err(&ndev->pci_dev->dev,
 489                                         "%s(): unable to attach HELENE Ter tuner frontend\n",
 490                                         __func__);
 491                         goto frontend_detach;
 492                 }
 493         }
 494
 495         if (vb2_dvb_register_bus(&ndev->frontends[num],
 496                                  THIS_MODULE, NULL,
 497                                  &ndev->pci_dev->dev, NULL, adapter_nr, 1)) {
 498                 dev_dbg(&ndev->pci_dev->dev,
 499                         "%s(): unable to register DVB bus %d\n",
 500                         __func__, num);
 501                 goto frontend_detach;
 502         }
 503         dev_info(&ndev->pci_dev->dev, "DVB init done, num=%d\n", num);
 504         return 0;
 505 frontend_detach:
 506         vb2_dvb_dealloc_frontends(&ndev->frontends[num]);
 507         return -EINVAL;
 508 }
 509
 510 static void netup_unidvb_dvb_fini(struct netup_unidvb_dev *ndev, int num)
 511 {
 512         if (num < 0 || num > 1) {
 513                 dev_err(&ndev->pci_dev->dev,
 514                         "%s(): unable to unregister DVB bus %d\n",
 515                         __func__, num);
 516                 return;
 517         }
 518         vb2_dvb_unregister_bus(&ndev->frontends[num]);
 519         dev_info(&ndev->pci_dev->dev,
 520                 "%s(): DVB bus %d unregistered\n", __func__, num);
 521 }
 522
 523 static int netup_unidvb_dvb_setup(struct netup_unidvb_dev *ndev)
 524 {
 525         int res;
 526
 527         res = netup_unidvb_dvb_init(ndev, 0);
 528         if (res)
 529                 return res;
 530         res = netup_unidvb_dvb_init(ndev, 1);
 531         if (res) {
 532                 netup_unidvb_dvb_fini(ndev, 0);
 533                 return res;
 534         }
 535         return 0;
 536 }
 537
 538 static int netup_unidvb_ring_copy(struct netup_dma *dma,
 539                                   struct netup_unidvb_buffer *buf)
 540 {
 541         u32 copy_bytes, ring_bytes;
 542         u32 buff_bytes = NETUP_DMA_PACKETS_COUNT * 188 - buf->size;
 543         u8 *p = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
 544         struct netup_unidvb_dev *ndev = dma->ndev;
 545
 546         if (p == NULL) {
 547                 dev_err(&ndev->pci_dev->dev,
 548                         "%s(): buffer is NULL\n", __func__);
 549                 return -EINVAL;
 550         }
 551         p += buf->size;
 552         if (dma->data_offset + dma->data_size > dma->ring_buffer_size) {
 553                 ring_bytes = dma->ring_buffer_size - dma->data_offset;
 554                 copy_bytes = (ring_bytes > buff_bytes) ?
 555                         buff_bytes : ring_bytes;
 556                 memcpy_fromio(p, (u8 __iomem *)(dma->addr_virt + dma->data_offset), copy_bytes);
 557                 p += copy_bytes;
 558                 buf->size += copy_bytes;
 559                 buff_bytes -= copy_bytes;
 560                 dma->data_size -= copy_bytes;
 561                 dma->data_offset += copy_bytes;
 562                 if (dma->data_offset == dma->ring_buffer_size)
 563                         dma->data_offset = 0;
 564         }
 565         if (buff_bytes > 0) {
 566                 ring_bytes = dma->data_size;
 567                 copy_bytes = (ring_bytes > buff_bytes) ?
 568                                 buff_bytes : ring_bytes;
 569                 memcpy_fromio(p, (u8 __iomem *)(dma->addr_virt + dma->data_offset), copy_bytes);
 570                 buf->size += copy_bytes;
 571                 dma->data_size -= copy_bytes;
 572                 dma->data_offset += copy_bytes;
 573                 if (dma->data_offset == dma->ring_buffer_size)
 574                         dma->data_offset = 0;
 575         }
 576         return 0;
 577 }
 578
 579 static void netup_unidvb_dma_worker(struct work_struct *work)
 580 {
 581         struct netup_dma *dma = container_of(work, struct netup_dma, work);
 582         struct netup_unidvb_dev *ndev = dma->ndev;
 583         struct netup_unidvb_buffer *buf;
 584         unsigned long flags;
 585
 586         spin_lock_irqsave(&dma->lock, flags);
 587         if (dma->data_size == 0) {
 588                 dev_dbg(&ndev->pci_dev->dev,
 589                         "%s(): data_size == 0\n", __func__);
 590                 goto work_done;
 591         }
 592         while (dma->data_size > 0) {
 593                 if (list_empty(&dma->free_buffers)) {
 594                         dev_dbg(&ndev->pci_dev->dev,
 595                                 "%s(): no free buffers\n", __func__);
 596                         goto work_done;
 597                 }
 598                 buf = list_first_entry(&dma->free_buffers,
 599                         struct netup_unidvb_buffer, list);
 600                 if (buf->size >= NETUP_DMA_PACKETS_COUNT * 188) {
 601                         dev_dbg(&ndev->pci_dev->dev,
 602                                 "%s(): buffer overflow, size %d\n",
 603                                 __func__, buf->size);
 604                         goto work_done;
 605                 }
 606                 if (netup_unidvb_ring_copy(dma, buf))
 607                         goto work_done;
 608                 if (buf->size == NETUP_DMA_PACKETS_COUNT * 188) {
 609                         list_del(&buf->list);
 610                         dev_dbg(&ndev->pci_dev->dev,
 611                                 "%s(): buffer %p done, size %d\n",
 612                                 __func__, buf, buf->size);
 613                         buf->vb.vb2_buf.timestamp = ktime_get_ns();
 614                         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, buf->size);
 615                         vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
 616                 }
 617         }
 618 work_done:
 619         dma->data_size = 0;
 620         spin_unlock_irqrestore(&dma->lock, flags);
 621 }
 622
 623 static void netup_unidvb_queue_cleanup(struct netup_dma *dma)
 624 {
 625         struct netup_unidvb_buffer *buf;
 626         unsigned long flags;
 627
 628         spin_lock_irqsave(&dma->lock, flags);
 629         while (!list_empty(&dma->free_buffers)) {
 630                 buf = list_first_entry(&dma->free_buffers,
 631                         struct netup_unidvb_buffer, list);
 632                 list_del(&buf->list);
 633                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
 634         }
 635         spin_unlock_irqrestore(&dma->lock, flags);
 636 }
 637
 638 static void netup_unidvb_dma_timeout(struct timer_list *t)
 639 {
 640         struct netup_dma *dma = from_timer(dma, t, timeout);
 641         struct netup_unidvb_dev *ndev = dma->ndev;
 642
 643         dev_dbg(&ndev->pci_dev->dev, "%s()\n", __func__);
 644         netup_unidvb_queue_cleanup(dma);
 645 }
 646
 647 static int netup_unidvb_dma_init(struct netup_unidvb_dev *ndev, int num)
 648 {
 649         struct netup_dma *dma;
 650         struct device *dev = &ndev->pci_dev->dev;
 651
 652         if (num < 0 || num > 1) {
 653                 dev_err(dev, "%s(): unable to register DMA%d\n",
 654                         __func__, num);
 655                 return -ENODEV;
 656         }
 657         dma = &ndev->dma[num];
 658         dev_info(dev, "%s(): starting DMA%d\n", __func__, num);
 659         dma->num = num;
 660         dma->ndev = ndev;
 661         spin_lock_init(&dma->lock);
 662         INIT_WORK(&dma->work, netup_unidvb_dma_worker);
 663         INIT_LIST_HEAD(&dma->free_buffers);
 664         timer_setup(&dma->timeout, netup_unidvb_dma_timeout, 0);
 665         dma->ring_buffer_size = ndev->dma_size / 2;
 666         dma->addr_virt = ndev->dma_virt + dma->ring_buffer_size * num;
 667         dma->addr_phys = (dma_addr_t)((u64)ndev->dma_phys +
 668                 dma->ring_buffer_size * num);
 669         dev_info(dev, "%s(): DMA%d buffer virt/phys 0x%p/0x%llx size %d\n",
 670                 __func__, num, dma->addr_virt,
 671                 (unsigned long long)dma->addr_phys,
 672                 dma->ring_buffer_size);
 673         memset_io((u8 __iomem *)dma->addr_virt, 0, dma->ring_buffer_size);
 674         dma->addr_last = dma->addr_phys;
 675         dma->high_addr = (u32)(dma->addr_phys & 0xC0000000);
 676         dma->regs = (struct netup_dma_regs __iomem *)(num == 0 ?
 677                 ndev->bmmio0 + NETUP_DMA0_ADDR :
 678                 ndev->bmmio0 + NETUP_DMA1_ADDR);
 679         writel((NETUP_DMA_BLOCKS_COUNT << 24) |
 680                 (NETUP_DMA_PACKETS_COUNT << 8) | 188, &dma->regs->size);
 681         writel((u32)(dma->addr_phys & 0x3FFFFFFF), &dma->regs->start_addr_lo);
 682         writel(0, &dma->regs->start_addr_hi);
 683         writel(dma->high_addr, ndev->bmmio0 + 0x1000);
 684         writel(375000000, &dma->regs->timeout);
 685         msleep(1000);
 686         writel(BIT_DMA_IRQ, &dma->regs->ctrlstat_clear);
 687         return 0;
 688 }
 689
 690 static void netup_unidvb_dma_fini(struct netup_unidvb_dev *ndev, int num)
 691 {
 692         struct netup_dma *dma;
 693
 694         if (num < 0 || num > 1)
 695                 return;
 696         dev_dbg(&ndev->pci_dev->dev, "%s(): num %d\n", __func__, num);
 697         dma = &ndev->dma[num];
 698         netup_unidvb_dma_enable(dma, 0);
 699         msleep(50);
 700         cancel_work_sync(&dma->work);
 701         del_timer_sync(&dma->timeout);
 702 }
 703
 704 static int netup_unidvb_dma_setup(struct netup_unidvb_dev *ndev)
 705 {
 706         int res;
 707
 708         res = netup_unidvb_dma_init(ndev, 0);
 709         if (res)
 710                 return res;
 711         res = netup_unidvb_dma_init(ndev, 1);
 712         if (res) {
 713                 netup_unidvb_dma_fini(ndev, 0);
 714                 return res;
 715         }
 716         netup_unidvb_dma_enable(&ndev->dma[0], 0);
 717         netup_unidvb_dma_enable(&ndev->dma[1], 0);
 718         return 0;
 719 }
 720
 721 static int netup_unidvb_ci_setup(struct netup_unidvb_dev *ndev,
 722                                  struct pci_dev *pci_dev)
 723 {
 724         int res;
 725
 726         writew(NETUP_UNIDVB_IRQ_CI, ndev->bmmio0 + REG_IMASK_SET);
 727         res = netup_unidvb_ci_register(ndev, 0, pci_dev);
 728         if (res)
 729                 return res;
 730         res = netup_unidvb_ci_register(ndev, 1, pci_dev);
 731         if (res)
 732                 netup_unidvb_ci_unregister(ndev, 0);
 733         return res;
 734 }
 735
 736 static int netup_unidvb_request_mmio(struct pci_dev *pci_dev)
 737 {
 738         if (!request_mem_region(pci_resource_start(pci_dev, 0),
 739                         pci_resource_len(pci_dev, 0), NETUP_UNIDVB_NAME)) {
 740                 dev_err(&pci_dev->dev,
 741                         "%s(): unable to request MMIO bar 0 at 0x%llx\n",
 742                         __func__,
 743                         (unsigned long long)pci_resource_start(pci_dev, 0));
 744                 return -EBUSY;
 745         }
 746         if (!request_mem_region(pci_resource_start(pci_dev, 1),
 747                         pci_resource_len(pci_dev, 1), NETUP_UNIDVB_NAME)) {
 748                 dev_err(&pci_dev->dev,
 749                         "%s(): unable to request MMIO bar 1 at 0x%llx\n",
 750                         __func__,
 751                         (unsigned long long)pci_resource_start(pci_dev, 1));
 752                 release_mem_region(pci_resource_start(pci_dev, 0),
 753                         pci_resource_len(pci_dev, 0));
 754                 return -EBUSY;
 755         }
 756         return 0;
 757 }
 758
 759 static int netup_unidvb_request_modules(struct device *dev)
 760 {
 761         static const char * const modules[] = {
 762                 "lnbh25", "ascot2e", "horus3a", "cxd2841er", "helene", NULL
 763         };
 764         const char * const *curr_mod = modules;
 765         int err;
 766
 767         while (*curr_mod != NULL) {
 768                 err = request_module(*curr_mod);
 769                 if (err) {
 770                         dev_warn(dev, "request_module(%s) failed: %d\n",
 771                                 *curr_mod, err);
 772                 }
 773                 ++curr_mod;
 774         }
 775         return 0;
 776 }
 777
 778 static int netup_unidvb_initdev(struct pci_dev *pci_dev,
 779                                 const struct pci_device_id *pci_id)
 780 {
 781         u8 board_revision;
 782         u16 board_vendor;
 783         struct netup_unidvb_dev *ndev;
 784         int old_firmware = 0;
 785
 786         netup_unidvb_request_modules(&pci_dev->dev);
 787
 788         /* Check card revision */
 789         if (pci_dev->revision != NETUP_PCI_DEV_REVISION) {
 790                 dev_err(&pci_dev->dev,
 791                         "netup_unidvb: expected card revision %d, got %d\n",
 792                         NETUP_PCI_DEV_REVISION, pci_dev->revision);
 793                 dev_err(&pci_dev->dev,
 794                         "Please upgrade firmware!\n");
 795                 dev_err(&pci_dev->dev,
 796                         "Instructions on http://www.netup.tv\n");
 797                 old_firmware = 1;
 798                 spi_enable = 1;
 799         }
 800
 801         /* allocate device context */
 802         ndev = kzalloc(sizeof(*ndev), GFP_KERNEL);
 803         if (!ndev)
 804                 goto dev_alloc_err;
 805
 806         /* detect hardware revision */
 807         if (pci_dev->device == NETUP_HW_REV_1_3)
 808                 ndev->rev = NETUP_HW_REV_1_3;
 809         else
 810                 ndev->rev = NETUP_HW_REV_1_4;
 811
 812         dev_info(&pci_dev->dev,
 813                 "%s(): board (0x%x) hardware revision 0x%x\n",
 814                 __func__, pci_dev->device, ndev->rev);
 815
 816         ndev->old_fw = old_firmware;
 817         ndev->wq = create_singlethread_workqueue(NETUP_UNIDVB_NAME);
 818         if (!ndev->wq) {
 819                 dev_err(&pci_dev->dev,
 820                         "%s(): unable to create workqueue\n", __func__);
 821                 goto wq_create_err;
 822         }
 823         ndev->pci_dev = pci_dev;
 824         ndev->pci_bus = pci_dev->bus->number;
 825         ndev->pci_slot = PCI_SLOT(pci_dev->devfn);
 826         ndev->pci_func = PCI_FUNC(pci_dev->devfn);
 827         ndev->board_num = ndev->pci_bus*10 + ndev->pci_slot;
 828         pci_set_drvdata(pci_dev, ndev);
 829         /* PCI init */
 830         dev_info(&pci_dev->dev, "%s(): PCI device (%d). Bus:0x%x Slot:0x%x\n",
 831                 __func__, ndev->board_num, ndev->pci_bus, ndev->pci_slot);
 832
 833         if (pci_enable_device(pci_dev)) {
 834                 dev_err(&pci_dev->dev, "%s(): pci_enable_device failed\n",
 835                         __func__);
 836                 goto pci_enable_err;
 837         }
 838         /* read PCI info */
 839         pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &board_revision);
 840         pci_read_config_word(pci_dev, PCI_VENDOR_ID, &board_vendor);
 841         if (board_vendor != NETUP_VENDOR_ID) {
 842                 dev_err(&pci_dev->dev, "%s(): unknown board vendor 0x%x",
 843                         __func__, board_vendor);
 844                 goto pci_detect_err;
 845         }
 846         dev_info(&pci_dev->dev,
 847                 "%s(): board vendor 0x%x, revision 0x%x\n",
 848                 __func__, board_vendor, board_revision);
 849         pci_set_master(pci_dev);
 850         if (dma_set_mask(&pci_dev->dev, 0xffffffff) < 0) {
 851                 dev_err(&pci_dev->dev,
 852                         "%s(): 32bit PCI DMA is not supported\n", __func__);
 853                 goto pci_detect_err;
 854         }
 855         dev_info(&pci_dev->dev, "%s(): using 32bit PCI DMA\n", __func__);
 856         /* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */
 857         pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL,
 858                 PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
 859                 PCI_EXP_DEVCTL_NOSNOOP_EN, 0);
 860         /* Adjust PCIe completion timeout. */
 861         pcie_capability_clear_and_set_word(pci_dev,
 862                 PCI_EXP_DEVCTL2, PCI_EXP_DEVCTL2_COMP_TIMEOUT, 0x2);
 863
 864         if (netup_unidvb_request_mmio(pci_dev)) {
 865                 dev_err(&pci_dev->dev,
 866                         "%s(): unable to request MMIO regions\n", __func__);
 867                 goto pci_detect_err;
 868         }
 869         ndev->lmmio0 = ioremap(pci_resource_start(pci_dev, 0),
 870                 pci_resource_len(pci_dev, 0));
 871         if (!ndev->lmmio0) {
 872                 dev_err(&pci_dev->dev,
 873                         "%s(): unable to remap MMIO bar 0\n", __func__);
 874                 goto pci_bar0_error;
 875         }
 876         ndev->lmmio1 = ioremap(pci_resource_start(pci_dev, 1),
 877                 pci_resource_len(pci_dev, 1));
 878         if (!ndev->lmmio1) {
 879                 dev_err(&pci_dev->dev,
 880                         "%s(): unable to remap MMIO bar 1\n", __func__);
 881                 goto pci_bar1_error;
 882         }
 883         ndev->bmmio0 = (u8 __iomem *)ndev->lmmio0;
 884         ndev->bmmio1 = (u8 __iomem *)ndev->lmmio1;
 885         dev_info(&pci_dev->dev,
 886                 "%s(): PCI MMIO at 0x%p (%d); 0x%p (%d); IRQ %d",
 887                 __func__,
 888                 ndev->lmmio0, (u32)pci_resource_len(pci_dev, 0),
 889                 ndev->lmmio1, (u32)pci_resource_len(pci_dev, 1),
 890                 pci_dev->irq);
 891
 892         ndev->dma_size = 2 * 188 *
 893                 NETUP_DMA_BLOCKS_COUNT * NETUP_DMA_PACKETS_COUNT;
 894         ndev->dma_virt = dma_alloc_coherent(&pci_dev->dev,
 895                 ndev->dma_size, &ndev->dma_phys, GFP_KERNEL);
 896         if (!ndev->dma_virt) {
 897                 dev_err(&pci_dev->dev, "%s(): unable to allocate DMA buffer\n",
 898                         __func__);
 899                 goto dma_alloc_err;
 900         }
 901         netup_unidvb_dev_enable(ndev);
 902         if (spi_enable && netup_spi_init(ndev)) {
 903                 dev_warn(&pci_dev->dev,
 904                         "netup_unidvb: SPI flash setup failed\n");
 905                 goto spi_setup_err;
 906         }
 907         if (old_firmware) {
 908                 dev_err(&pci_dev->dev,
 909                         "netup_unidvb: card initialization was incomplete\n");
 910                 return 0;
 911         }
 912         if (netup_i2c_register(ndev)) {
 913                 dev_err(&pci_dev->dev, "netup_unidvb: I2C setup failed\n");
 914                 goto i2c_setup_err;
 915         }
 916         /* enable I2C IRQs */
 917         writew(NETUP_UNIDVB_IRQ_I2C0 | NETUP_UNIDVB_IRQ_I2C1,
 918                 ndev->bmmio0 + REG_IMASK_SET);
 919         usleep_range(5000, 10000);
 920         if (netup_unidvb_dvb_setup(ndev)) {
 921                 dev_err(&pci_dev->dev, "netup_unidvb: DVB setup failed\n");
 922                 goto dvb_setup_err;
 923         }
 924         if (netup_unidvb_ci_setup(ndev, pci_dev)) {
 925                 dev_err(&pci_dev->dev, "netup_unidvb: CI setup failed\n");
 926                 goto ci_setup_err;
 927         }
 928         if (netup_unidvb_dma_setup(ndev)) {
 929                 dev_err(&pci_dev->dev, "netup_unidvb: DMA setup failed\n");
 930                 goto dma_setup_err;
 931         }
 932
 933         if (request_irq(pci_dev->irq, netup_unidvb_isr, IRQF_SHARED,
 934                         "netup_unidvb", pci_dev) < 0) {
 935                 dev_err(&pci_dev->dev,
 936                         "%s(): can't get IRQ %d\n", __func__, pci_dev->irq);
 937                 goto dma_setup_err;
 938         }
 939
 940         dev_info(&pci_dev->dev,
 941                 "netup_unidvb: device has been initialized\n");
 942         return 0;
 943 dma_setup_err:
 944         netup_unidvb_ci_unregister(ndev, 0);
 945         netup_unidvb_ci_unregister(ndev, 1);
 946 ci_setup_err:
 947         netup_unidvb_dvb_fini(ndev, 0);
 948         netup_unidvb_dvb_fini(ndev, 1);
 949 dvb_setup_err:
 950         netup_i2c_unregister(ndev);
 951 i2c_setup_err:
 952         if (ndev->spi)
 953                 netup_spi_release(ndev);
 954 spi_setup_err:
 955         dma_free_coherent(&pci_dev->dev, ndev->dma_size,
 956                         ndev->dma_virt, ndev->dma_phys);
 957 dma_alloc_err:
 958         iounmap(ndev->lmmio1);
 959 pci_bar1_error:
 960         iounmap(ndev->lmmio0);
 961 pci_bar0_error:
 962         release_mem_region(pci_resource_start(pci_dev, 0),
 963                 pci_resource_len(pci_dev, 0));
 964         release_mem_region(pci_resource_start(pci_dev, 1),
 965                 pci_resource_len(pci_dev, 1));
 966 pci_detect_err:
 967         pci_disable_device(pci_dev);
 968 pci_enable_err:
 969         pci_set_drvdata(pci_dev, NULL);
 970         destroy_workqueue(ndev->wq);
 971 wq_create_err:
 972         kfree(ndev);
 973 dev_alloc_err:
 974         dev_err(&pci_dev->dev,
 975                 "%s(): failed to initialize device\n", __func__);
 976         return -EIO;
 977 }
 978
 979 static void netup_unidvb_finidev(struct pci_dev *pci_dev)
 980 {
 981         struct netup_unidvb_dev *ndev = pci_get_drvdata(pci_dev);
 982
 983         dev_info(&pci_dev->dev, "%s(): trying to stop device\n", __func__);
 984         if (!ndev->old_fw) {
 985                 netup_unidvb_dma_fini(ndev, 0);
 986                 netup_unidvb_dma_fini(ndev, 1);
 987                 netup_unidvb_ci_unregister(ndev, 0);
 988                 netup_unidvb_ci_unregister(ndev, 1);
 989                 netup_unidvb_dvb_fini(ndev, 0);
 990                 netup_unidvb_dvb_fini(ndev, 1);
 991                 netup_i2c_unregister(ndev);
 992         }
 993         if (ndev->spi)
 994                 netup_spi_release(ndev);
 995         writew(0xffff, ndev->bmmio0 + REG_IMASK_CLEAR);
 996         dma_free_coherent(&ndev->pci_dev->dev, ndev->dma_size,
 997                         ndev->dma_virt, ndev->dma_phys);
 998         free_irq(pci_dev->irq, pci_dev);
 999         iounmap(ndev->lmmio0);
1000         iounmap(ndev->lmmio1);
1001         release_mem_region(pci_resource_start(pci_dev, 0),
1002                 pci_resource_len(pci_dev, 0));
1003         release_mem_region(pci_resource_start(pci_dev, 1),
1004                 pci_resource_len(pci_dev, 1));
1005         pci_disable_device(pci_dev);
1006         pci_set_drvdata(pci_dev, NULL);
1007         destroy_workqueue(ndev->wq);
1008         kfree(ndev);
1009         dev_info(&pci_dev->dev,
1010                 "%s(): device has been successfully stopped\n", __func__);
1011 }
1012
1013
1014 static const struct pci_device_id netup_unidvb_pci_tbl[] = {
1015         { PCI_DEVICE(0x1b55, 0x18f6) }, /* hw rev. 1.3 */
1016         { PCI_DEVICE(0x1b55, 0x18f7) }, /* hw rev. 1.4 */
1017         { 0, }
1018 };
1019 MODULE_DEVICE_TABLE(pci, netup_unidvb_pci_tbl);
1020
1021 static struct pci_driver netup_unidvb_pci_driver = {
1022         .name     = "netup_unidvb",
1023         .id_table = netup_unidvb_pci_tbl,
1024         .probe    = netup_unidvb_initdev,
1025         .remove   = netup_unidvb_finidev,
1026 };
1027
1028 module_pci_driver(netup_unidvb_pci_driver);