drivers/raw/ifpga_rawdev/base/opae_intel_max10.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2010-2019 Intel Corporation
   3  */
   4
   5 #include "opae_intel_max10.h"
   6
   7 static struct intel_max10_device *g_max10;
   8
   9 int max10_reg_read(unsigned int reg, unsigned int *val)
  10 {
  11         if (!g_max10)
  12                 return -ENODEV;
  13
  14         return spi_transaction_read(g_max10->spi_tran_dev,
  15                         reg, 4, (unsigned char *)val);
  16 }
  17
  18 int max10_reg_write(unsigned int reg, unsigned int val)
  19 {
  20         if (!g_max10)
  21                 return -ENODEV;
  22
  23         return spi_transaction_write(g_max10->spi_tran_dev,
  24                         reg, 4, (unsigned char *)&val);
  25 }
  26
  27 struct intel_max10_device *
  28 intel_max10_device_probe(struct altera_spi_device *spi,
  29                 int chipselect)
  30 {
  31         struct intel_max10_device *dev;
  32         int ret;
  33         unsigned int val;
  34
  35         dev = opae_malloc(sizeof(*dev));
  36         if (!dev)
  37                 return NULL;
  38
  39         dev->spi_master = spi;
  40
  41         dev->spi_tran_dev = spi_transaction_init(spi, chipselect);
  42         if (!dev->spi_tran_dev) {
  43                 dev_err(dev, "%s spi tran init fail\n", __func__);
  44                 goto free_dev;
  45         }
  46
  47         /* set the max10 device firstly */
  48         g_max10 = dev;
  49
  50         /* read FPGA loading information */
  51         ret = max10_reg_read(FPGA_PAGE_INFO_OFF, &val);
  52         if (ret) {
  53                 dev_err(dev, "fail to get FPGA loading info\n");
  54                 goto spi_tran_fail;
  55         }
  56         dev_info(dev, "FPGA loaded from %s Image\n", val ? "User" : "Factory");
  57
  58         /* set PKVL Polling manually in BBS */
  59         ret = max10_reg_write(PKVL_POLLING_CTRL, 0x3);
  60         if (ret) {
  61                 dev_err(dev, "%s set PKVL polling fail\n", __func__);
  62                 goto spi_tran_fail;
  63         }
  64
  65         return dev;
  66
  67 spi_tran_fail:
  68         spi_transaction_remove(dev->spi_tran_dev);
  69 free_dev:
  70         g_max10 = NULL;
  71         opae_free(dev);
  72
  73         return NULL;
  74 }
  75
  76 int intel_max10_device_remove(struct intel_max10_device *dev)
  77 {
  78         if (!dev)
  79                 return 0;
  80
  81         if (dev->spi_tran_dev)
  82                 spi_transaction_remove(dev->spi_tran_dev);
  83
  84         g_max10 = NULL;
  85         opae_free(dev);
  86
  87         return 0;
  88 }