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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) 2005-2006 Micronas USA Inc.
0004  */
0005 
0006 #include "saa7134.h"
0007 #include "saa7134-reg.h"
0008 
0009 #include <linux/module.h>
0010 #include <linux/kernel.h>
0011 #include <linux/init.h>
0012 #include <linux/spinlock.h>
0013 #include <linux/wait.h>
0014 #include <linux/list.h>
0015 #include <linux/slab.h>
0016 #include <linux/time.h>
0017 #include <linux/mm.h>
0018 #include <linux/usb.h>
0019 #include <linux/i2c.h>
0020 #include <asm/byteorder.h>
0021 #include <media/v4l2-common.h>
0022 #include <media/v4l2-device.h>
0023 #include <media/v4l2-subdev.h>
0024 
0025 #include "go7007-priv.h"
0026 
0027 /*#define GO7007_HPI_DEBUG*/
0028 
0029 enum hpi_address {
0030     HPI_ADDR_VIDEO_BUFFER = 0xe4,
0031     HPI_ADDR_INIT_BUFFER = 0xea,
0032     HPI_ADDR_INTR_RET_VALUE = 0xee,
0033     HPI_ADDR_INTR_RET_DATA = 0xec,
0034     HPI_ADDR_INTR_STATUS = 0xf4,
0035     HPI_ADDR_INTR_WR_PARAM = 0xf6,
0036     HPI_ADDR_INTR_WR_INDEX = 0xf8,
0037 };
0038 
0039 enum gpio_command {
0040     GPIO_COMMAND_RESET = 0x00, /* 000b */
0041     GPIO_COMMAND_REQ1  = 0x04, /* 001b */
0042     GPIO_COMMAND_WRITE = 0x20, /* 010b */
0043     GPIO_COMMAND_REQ2  = 0x24, /* 011b */
0044     GPIO_COMMAND_READ  = 0x80, /* 100b */
0045     GPIO_COMMAND_VIDEO = 0x84, /* 101b */
0046     GPIO_COMMAND_IDLE  = 0xA0, /* 110b */
0047     GPIO_COMMAND_ADDR  = 0xA4, /* 111b */
0048 };
0049 
0050 struct saa7134_go7007 {
0051     struct v4l2_subdev sd;
0052     struct saa7134_dev *dev;
0053     u8 *top;
0054     u8 *bottom;
0055     dma_addr_t top_dma;
0056     dma_addr_t bottom_dma;
0057 };
0058 
0059 static const struct go7007_board_info board_voyager = {
0060     .flags       = 0,
0061     .sensor_flags    = GO7007_SENSOR_656 |
0062                 GO7007_SENSOR_VALID_ENABLE |
0063                 GO7007_SENSOR_TV |
0064                 GO7007_SENSOR_VBI,
0065     .audio_flags    = GO7007_AUDIO_I2S_MODE_1 |
0066                 GO7007_AUDIO_WORD_16,
0067     .audio_rate  = 48000,
0068     .audio_bclk_div  = 8,
0069     .audio_main_div  = 2,
0070     .hpi_buffer_cap  = 7,
0071     .num_inputs  = 1,
0072     .inputs      = {
0073         {
0074             .name       = "SAA7134",
0075         },
0076     },
0077 };
0078 
0079 /********************* Driver for GPIO HPI interface *********************/
0080 
0081 static int gpio_write(struct saa7134_dev *dev, u8 addr, u16 data)
0082 {
0083     saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
0084 
0085     /* Write HPI address */
0086     saa_writeb(SAA7134_GPIO_GPSTATUS0, addr);
0087     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
0088     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0089 
0090     /* Write low byte */
0091     saa_writeb(SAA7134_GPIO_GPSTATUS0, data & 0xff);
0092     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
0093     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0094 
0095     /* Write high byte */
0096     saa_writeb(SAA7134_GPIO_GPSTATUS0, data >> 8);
0097     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
0098     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0099 
0100     return 0;
0101 }
0102 
0103 static int gpio_read(struct saa7134_dev *dev, u8 addr, u16 *data)
0104 {
0105     saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
0106 
0107     /* Write HPI address */
0108     saa_writeb(SAA7134_GPIO_GPSTATUS0, addr);
0109     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
0110     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0111 
0112     saa_writeb(SAA7134_GPIO_GPMODE0, 0x00);
0113 
0114     /* Read low byte */
0115     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_READ);
0116     saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0117     saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0118     *data = saa_readb(SAA7134_GPIO_GPSTATUS0);
0119     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0120 
0121     /* Read high byte */
0122     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_READ);
0123     saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0124     saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0125     *data |= saa_readb(SAA7134_GPIO_GPSTATUS0) << 8;
0126     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0127 
0128     return 0;
0129 }
0130 
0131 static int saa7134_go7007_interface_reset(struct go7007 *go)
0132 {
0133     struct saa7134_go7007 *saa = go->hpi_context;
0134     struct saa7134_dev *dev = saa->dev;
0135     u16 intr_val, intr_data;
0136     int count = 20;
0137 
0138     saa_clearb(SAA7134_TS_PARALLEL, 0x80); /* Disable TS interface */
0139     saa_writeb(SAA7134_GPIO_GPMODE2, 0xa4);
0140     saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
0141 
0142     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
0143     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_RESET);
0144     msleep(1);
0145     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
0146     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ2);
0147     msleep(10);
0148 
0149     saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0150     saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0151 
0152     saa_readb(SAA7134_GPIO_GPSTATUS2);
0153     /*pr_debug("status is %s\n", saa_readb(SAA7134_GPIO_GPSTATUS2) & 0x40 ? "OK" : "not OK"); */
0154 
0155     /* enter command mode...(?) */
0156     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ1);
0157     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_REQ2);
0158 
0159     do {
0160         saa_clearb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0161         saa_setb(SAA7134_GPIO_GPMODE3, SAA7134_GPIO_GPRESCAN);
0162         saa_readb(SAA7134_GPIO_GPSTATUS2);
0163         /*pr_info("gpio is %08x\n", saa_readl(SAA7134_GPIO_GPSTATUS0 >> 2)); */
0164     } while (--count > 0);
0165 
0166     /* Wait for an interrupt to indicate successful hardware reset */
0167     if (go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
0168             (intr_val & ~0x1) != 0x55aa) {
0169         pr_err("saa7134-go7007: unable to reset the GO7007\n");
0170         return -1;
0171     }
0172     return 0;
0173 }
0174 
0175 static int saa7134_go7007_write_interrupt(struct go7007 *go, int addr, int data)
0176 {
0177     struct saa7134_go7007 *saa = go->hpi_context;
0178     struct saa7134_dev *dev = saa->dev;
0179     int i;
0180     u16 status_reg;
0181 
0182 #ifdef GO7007_HPI_DEBUG
0183     pr_debug("saa7134-go7007: WriteInterrupt: %04x %04x\n", addr, data);
0184 #endif
0185 
0186     for (i = 0; i < 100; ++i) {
0187         gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);
0188         if (!(status_reg & 0x0010))
0189             break;
0190         msleep(10);
0191     }
0192     if (i == 100) {
0193         pr_err("saa7134-go7007: device is hung, status reg = 0x%04x\n",
0194             status_reg);
0195         return -1;
0196     }
0197     gpio_write(dev, HPI_ADDR_INTR_WR_PARAM, data);
0198     gpio_write(dev, HPI_ADDR_INTR_WR_INDEX, addr);
0199 
0200     return 0;
0201 }
0202 
0203 static int saa7134_go7007_read_interrupt(struct go7007 *go)
0204 {
0205     struct saa7134_go7007 *saa = go->hpi_context;
0206     struct saa7134_dev *dev = saa->dev;
0207 
0208     /* XXX we need to wait if there is no interrupt available */
0209     go->interrupt_available = 1;
0210     gpio_read(dev, HPI_ADDR_INTR_RET_VALUE, &go->interrupt_value);
0211     gpio_read(dev, HPI_ADDR_INTR_RET_DATA, &go->interrupt_data);
0212 #ifdef GO7007_HPI_DEBUG
0213     pr_debug("saa7134-go7007: ReadInterrupt: %04x %04x\n",
0214             go->interrupt_value, go->interrupt_data);
0215 #endif
0216     return 0;
0217 }
0218 
0219 static void saa7134_go7007_irq_ts_done(struct saa7134_dev *dev,
0220                         unsigned long status)
0221 {
0222     struct go7007 *go = video_get_drvdata(dev->empress_dev);
0223     struct saa7134_go7007 *saa = go->hpi_context;
0224 
0225     if (!vb2_is_streaming(&go->vidq))
0226         return;
0227     if (0 != (status & 0x000f0000))
0228         pr_debug("saa7134-go7007: irq: lost %ld\n",
0229                 (status >> 16) & 0x0f);
0230     if (status & 0x100000) {
0231         dma_sync_single_for_cpu(&dev->pci->dev,
0232                     saa->bottom_dma, PAGE_SIZE, DMA_FROM_DEVICE);
0233         go7007_parse_video_stream(go, saa->bottom, PAGE_SIZE);
0234         saa_writel(SAA7134_RS_BA2(5), saa->bottom_dma);
0235     } else {
0236         dma_sync_single_for_cpu(&dev->pci->dev,
0237                     saa->top_dma, PAGE_SIZE, DMA_FROM_DEVICE);
0238         go7007_parse_video_stream(go, saa->top, PAGE_SIZE);
0239         saa_writel(SAA7134_RS_BA1(5), saa->top_dma);
0240     }
0241 }
0242 
0243 static int saa7134_go7007_stream_start(struct go7007 *go)
0244 {
0245     struct saa7134_go7007 *saa = go->hpi_context;
0246     struct saa7134_dev *dev = saa->dev;
0247 
0248     saa->top_dma = dma_map_page(&dev->pci->dev, virt_to_page(saa->top),
0249             0, PAGE_SIZE, DMA_FROM_DEVICE);
0250     if (dma_mapping_error(&dev->pci->dev, saa->top_dma))
0251         return -ENOMEM;
0252     saa->bottom_dma = dma_map_page(&dev->pci->dev,
0253             virt_to_page(saa->bottom),
0254             0, PAGE_SIZE, DMA_FROM_DEVICE);
0255     if (dma_mapping_error(&dev->pci->dev, saa->bottom_dma)) {
0256         dma_unmap_page(&dev->pci->dev, saa->top_dma, PAGE_SIZE,
0257                 DMA_FROM_DEVICE);
0258         return -ENOMEM;
0259     }
0260 
0261     saa_writel(SAA7134_VIDEO_PORT_CTRL0 >> 2, 0xA300B000);
0262     saa_writel(SAA7134_VIDEO_PORT_CTRL4 >> 2, 0x40000200);
0263 
0264     /* Set HPI interface for video */
0265     saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
0266     saa_writeb(SAA7134_GPIO_GPSTATUS0, HPI_ADDR_VIDEO_BUFFER);
0267     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
0268     saa_writeb(SAA7134_GPIO_GPMODE0, 0x00);
0269 
0270     /* Enable TS interface */
0271     saa_writeb(SAA7134_TS_PARALLEL, 0xe6);
0272 
0273     /* Reset TS interface */
0274     saa_setb(SAA7134_TS_SERIAL1, 0x01);
0275     saa_clearb(SAA7134_TS_SERIAL1, 0x01);
0276 
0277     /* Set up transfer block size */
0278     saa_writeb(SAA7134_TS_PARALLEL_SERIAL, 128 - 1);
0279     saa_writeb(SAA7134_TS_DMA0, ((PAGE_SIZE >> 7) - 1) & 0xff);
0280     saa_writeb(SAA7134_TS_DMA1, (PAGE_SIZE >> 15) & 0xff);
0281     saa_writeb(SAA7134_TS_DMA2, (PAGE_SIZE >> 31) & 0x3f);
0282 
0283     /* Enable video streaming mode */
0284     saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_VIDEO);
0285 
0286     saa_writel(SAA7134_RS_BA1(5), saa->top_dma);
0287     saa_writel(SAA7134_RS_BA2(5), saa->bottom_dma);
0288     saa_writel(SAA7134_RS_PITCH(5), 128);
0289     saa_writel(SAA7134_RS_CONTROL(5), SAA7134_RS_CONTROL_BURST_MAX);
0290 
0291     /* Enable TS FIFO */
0292     saa_setl(SAA7134_MAIN_CTRL, SAA7134_MAIN_CTRL_TE5);
0293 
0294     /* Enable DMA IRQ */
0295     saa_setl(SAA7134_IRQ1,
0296             SAA7134_IRQ1_INTE_RA2_1 | SAA7134_IRQ1_INTE_RA2_0);
0297 
0298     return 0;
0299 }
0300 
0301 static int saa7134_go7007_stream_stop(struct go7007 *go)
0302 {
0303     struct saa7134_go7007 *saa = go->hpi_context;
0304     struct saa7134_dev *dev;
0305 
0306     if (!saa)
0307         return -EINVAL;
0308     dev = saa->dev;
0309     if (!dev)
0310         return -EINVAL;
0311 
0312     /* Shut down TS FIFO */
0313     saa_clearl(SAA7134_MAIN_CTRL, SAA7134_MAIN_CTRL_TE5);
0314 
0315     /* Disable DMA IRQ */
0316     saa_clearl(SAA7134_IRQ1,
0317             SAA7134_IRQ1_INTE_RA2_1 | SAA7134_IRQ1_INTE_RA2_0);
0318 
0319     /* Disable TS interface */
0320     saa_clearb(SAA7134_TS_PARALLEL, 0x80);
0321 
0322     dma_unmap_page(&dev->pci->dev, saa->top_dma, PAGE_SIZE,
0323             DMA_FROM_DEVICE);
0324     dma_unmap_page(&dev->pci->dev, saa->bottom_dma, PAGE_SIZE,
0325             DMA_FROM_DEVICE);
0326 
0327     return 0;
0328 }
0329 
0330 static int saa7134_go7007_send_firmware(struct go7007 *go, u8 *data, int len)
0331 {
0332     struct saa7134_go7007 *saa = go->hpi_context;
0333     struct saa7134_dev *dev = saa->dev;
0334     u16 status_reg;
0335     int i;
0336 
0337 #ifdef GO7007_HPI_DEBUG
0338     pr_debug("saa7134-go7007: DownloadBuffer sending %d bytes\n", len);
0339 #endif
0340 
0341     while (len > 0) {
0342         i = len > 64 ? 64 : len;
0343         saa_writeb(SAA7134_GPIO_GPMODE0, 0xff);
0344         saa_writeb(SAA7134_GPIO_GPSTATUS0, HPI_ADDR_INIT_BUFFER);
0345         saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_ADDR);
0346         saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0347         while (i-- > 0) {
0348             saa_writeb(SAA7134_GPIO_GPSTATUS0, *data);
0349             saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_WRITE);
0350             saa_writeb(SAA7134_GPIO_GPSTATUS2, GPIO_COMMAND_IDLE);
0351             ++data;
0352             --len;
0353         }
0354         for (i = 0; i < 100; ++i) {
0355             gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);
0356             if (!(status_reg & 0x0002))
0357                 break;
0358         }
0359         if (i == 100) {
0360             pr_err("saa7134-go7007: device is hung, status reg = 0x%04x\n",
0361                    status_reg);
0362             return -1;
0363         }
0364     }
0365     return 0;
0366 }
0367 
0368 static const struct go7007_hpi_ops saa7134_go7007_hpi_ops = {
0369     .interface_reset    = saa7134_go7007_interface_reset,
0370     .write_interrupt    = saa7134_go7007_write_interrupt,
0371     .read_interrupt     = saa7134_go7007_read_interrupt,
0372     .stream_start       = saa7134_go7007_stream_start,
0373     .stream_stop        = saa7134_go7007_stream_stop,
0374     .send_firmware      = saa7134_go7007_send_firmware,
0375 };
0376 MODULE_FIRMWARE("go7007/go7007tv.bin");
0377 
0378 /* --------------------------------------------------------------------------*/
0379 
0380 static int saa7134_go7007_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
0381 {
0382 #if 0
0383     struct saa7134_go7007 *saa = container_of(sd, struct saa7134_go7007, sd);
0384     struct saa7134_dev *dev = saa->dev;
0385 
0386     return saa7134_s_std_internal(dev, NULL, norm);
0387 #else
0388     return 0;
0389 #endif
0390 }
0391 
0392 static const struct v4l2_subdev_video_ops saa7134_go7007_video_ops = {
0393     .s_std = saa7134_go7007_s_std,
0394 };
0395 
0396 static const struct v4l2_subdev_ops saa7134_go7007_sd_ops = {
0397     .video = &saa7134_go7007_video_ops,
0398 };
0399 
0400 /* --------------------------------------------------------------------------*/
0401 
0402 
0403 /********************* Add/remove functions *********************/
0404 
0405 static int saa7134_go7007_init(struct saa7134_dev *dev)
0406 {
0407     struct go7007 *go;
0408     struct saa7134_go7007 *saa;
0409     struct v4l2_subdev *sd;
0410 
0411     pr_debug("saa7134-go7007: probing new SAA713X board\n");
0412 
0413     go = go7007_alloc(&board_voyager, &dev->pci->dev);
0414     if (go == NULL)
0415         return -ENOMEM;
0416 
0417     saa = kzalloc(sizeof(struct saa7134_go7007), GFP_KERNEL);
0418     if (saa == NULL) {
0419         kfree(go);
0420         return -ENOMEM;
0421     }
0422 
0423     go->board_id = GO7007_BOARDID_PCI_VOYAGER;
0424     snprintf(go->bus_info, sizeof(go->bus_info), "PCI:%s", pci_name(dev->pci));
0425     strscpy(go->name, saa7134_boards[dev->board].name, sizeof(go->name));
0426     go->hpi_ops = &saa7134_go7007_hpi_ops;
0427     go->hpi_context = saa;
0428     saa->dev = dev;
0429 
0430     /* Init the subdevice interface */
0431     sd = &saa->sd;
0432     v4l2_subdev_init(sd, &saa7134_go7007_sd_ops);
0433     v4l2_set_subdevdata(sd, saa);
0434     strscpy(sd->name, "saa7134-go7007", sizeof(sd->name));
0435 
0436     /* Allocate a couple pages for receiving the compressed stream */
0437     saa->top = (u8 *)get_zeroed_page(GFP_KERNEL);
0438     if (!saa->top)
0439         goto allocfail;
0440     saa->bottom = (u8 *)get_zeroed_page(GFP_KERNEL);
0441     if (!saa->bottom)
0442         goto allocfail;
0443 
0444     /* Boot the GO7007 */
0445     if (go7007_boot_encoder(go, go->board_info->flags &
0446                     GO7007_BOARD_USE_ONBOARD_I2C) < 0)
0447         goto allocfail;
0448 
0449     /* Do any final GO7007 initialization, then register the
0450      * V4L2 and ALSA interfaces */
0451     if (go7007_register_encoder(go, go->board_info->num_i2c_devs) < 0)
0452         goto allocfail;
0453 
0454     /* Register the subdevice interface with the go7007 device */
0455     if (v4l2_device_register_subdev(&go->v4l2_dev, sd) < 0)
0456         pr_info("saa7134-go7007: register subdev failed\n");
0457 
0458     dev->empress_dev = &go->vdev;
0459 
0460     go->status = STATUS_ONLINE;
0461     return 0;
0462 
0463 allocfail:
0464     if (saa->top)
0465         free_page((unsigned long)saa->top);
0466     if (saa->bottom)
0467         free_page((unsigned long)saa->bottom);
0468     kfree(saa);
0469     kfree(go);
0470     return -ENOMEM;
0471 }
0472 
0473 static int saa7134_go7007_fini(struct saa7134_dev *dev)
0474 {
0475     struct go7007 *go;
0476     struct saa7134_go7007 *saa;
0477 
0478     if (NULL == dev->empress_dev)
0479         return 0;
0480 
0481     go = video_get_drvdata(dev->empress_dev);
0482     if (go->audio_enabled)
0483         go7007_snd_remove(go);
0484 
0485     saa = go->hpi_context;
0486     go->status = STATUS_SHUTDOWN;
0487     free_page((unsigned long)saa->top);
0488     free_page((unsigned long)saa->bottom);
0489     v4l2_device_unregister_subdev(&saa->sd);
0490     kfree(saa);
0491     vb2_video_unregister_device(&go->vdev);
0492 
0493     v4l2_device_put(&go->v4l2_dev);
0494     dev->empress_dev = NULL;
0495 
0496     return 0;
0497 }
0498 
0499 static struct saa7134_mpeg_ops saa7134_go7007_ops = {
0500     .type          = SAA7134_MPEG_GO7007,
0501     .init          = saa7134_go7007_init,
0502     .fini          = saa7134_go7007_fini,
0503     .irq_ts_done   = saa7134_go7007_irq_ts_done,
0504 };
0505 
0506 static int __init saa7134_go7007_mod_init(void)
0507 {
0508     return saa7134_ts_register(&saa7134_go7007_ops);
0509 }
0510 
0511 static void __exit saa7134_go7007_mod_cleanup(void)
0512 {
0513     saa7134_ts_unregister(&saa7134_go7007_ops);
0514 }
0515 
0516 module_init(saa7134_go7007_mod_init);
0517 module_exit(saa7134_go7007_mod_cleanup);
0518 
0519 MODULE_LICENSE("GPL v2");
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