src/soc/mediatek/mt8192/spi.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/mmio.h>
   4 #include <assert.h>
   5 #include <gpio.h>
   6 #include <soc/addressmap.h>
   7 #include <soc/flash_controller_common.h>
   8 #include <soc/spi.h>
   9
  10 struct mtk_spi_bus spi_bus[SPI_BUS_NUMBER] = {
  11         {
  12                 .regs = (void *)SPI0_BASE,
  13                 .cs_gpio = GPIO(SPI0_CSB),
  14         },
  15         {
  16                 .regs = (void *)SPI1_BASE,
  17                 .cs_gpio = GPIO(SPI1_CSB),
  18         },
  19         {
  20                 .regs = (void *)SPI2_BASE,
  21                 .cs_gpio = GPIO(SCP_SPI2_CSB),
  22         },
  23         {
  24                 .regs = (void *)SPI3_BASE,
  25                 .cs_gpio = GPIO(CAM_RST1),
  26         },
  27         {
  28                 .regs = (void *)SPI4_BASE,
  29                 .cs_gpio = GPIO(EINT5),
  30         },
  31         {
  32                 .regs = (void *)SPI5_BASE,
  33                 .cs_gpio = GPIO(SPI5_CSB),
  34         },
  35         {
  36                 .regs = (void *)SPI6_BASE,
  37                 .cs_gpio = GPIO(EINT1),
  38         },
  39         {
  40                 .regs = (void *)SPI7_BASE,
  41                 .cs_gpio = GPIO(SDA0),
  42         }
  43 };
  44
  45 struct pad_func {
  46         u8 pin_id;
  47         u8 func;
  48 };
  49
  50 #define PAD_FUNC(name, func) {PAD_##name##_ID, PAD_##name##_FUNC_##func}
  51 #define PAD_FUNC_GPIO(name) {PAD_##name##_ID, 0}
  52
  53 static const struct pad_func pad0_funcs[SPI_BUS_NUMBER][4] = {
  54         {
  55                 PAD_FUNC(SPI0_MI, SPI0_A_MI),
  56                 PAD_FUNC_GPIO(SPI0_CSB),
  57                 PAD_FUNC(SPI0_MO, SPI0_A_MO),
  58                 PAD_FUNC(SPI0_CLK, SPI0_A_CLK),
  59         },
  60         {
  61                 PAD_FUNC(SPI1_MI, SPI1_A_MI),
  62                 PAD_FUNC_GPIO(SPI1_CSB),
  63                 PAD_FUNC(SPI1_MO, SPI1_A_MO),
  64                 PAD_FUNC(SPI1_CLK, SPI1_A_CLK),
  65         },
  66         {
  67                 PAD_FUNC(SCP_SPI2_MI, SPI2_MI),
  68                 PAD_FUNC_GPIO(SCP_SPI2_CSB),
  69                 PAD_FUNC(SCP_SPI2_MO, SPI2_MO),
  70                 PAD_FUNC(SCP_SPI2_CK, SPI2_CLK),
  71         },
  72         {
  73                 PAD_FUNC(CAM_RST2, SPI3_MI),
  74                 PAD_FUNC_GPIO(CAM_RST1),
  75                 PAD_FUNC(CAM_PDN0, SPI3_MO),
  76                 PAD_FUNC(CAM_RST0, SPI3_CLK),
  77         },
  78         {
  79                 PAD_FUNC(EINT6, SPI4_A_MI),
  80                 PAD_FUNC_GPIO(EINT5),
  81                 PAD_FUNC(EINT7, SPI4_A_MO),
  82                 PAD_FUNC(EINT4, SPI4_A_CLK),
  83         },
  84         {
  85                 PAD_FUNC(SPI5_MI, SPI5_A_MI),
  86                 PAD_FUNC_GPIO(SPI5_CSB),
  87                 PAD_FUNC(SPI5_MO, SPI5_A_MO),
  88                 PAD_FUNC(SPI5_CLK, SPI5_A_CLK),
  89         },
  90         {
  91                 PAD_FUNC(EINT2, SPI6_MI),
  92                 PAD_FUNC_GPIO(EINT1),
  93                 PAD_FUNC(EINT3, SPI6_MO),
  94                 PAD_FUNC(EINT0, SPI6_CLK),
  95         },
  96         {
  97                 PAD_FUNC(EINT16, SPI7_A_MI),
  98                 PAD_FUNC_GPIO(SDA0),
  99                 PAD_FUNC(EINT17, SPI7_A_MO),
 100                 PAD_FUNC(SCL0, SPI7_A_CLK),
 101         }
 102 };
 103
 104 void mtk_spi_set_gpio_pinmux(unsigned int bus, enum spi_pad_mask pad_select)
 105 {
 106         assert(bus < SPI_BUS_NUMBER);
 107         assert(pad_select == SPI_PAD0_MASK);
 108         const struct pad_func *ptr = NULL;
 109
 110         ptr = pad0_funcs[bus];
 111         for (int i = 0; i < 4; i++)
 112                 gpio_set_mode((gpio_t){.id = ptr[i].pin_id}, ptr[i].func);
 113 }
 114
 115 static const struct spi_ctrlr spi_flash_ctrlr = {
 116         .max_xfer_size = 65535,
 117         .flash_probe = mtk_spi_flash_probe,
 118 };
 119
 120 const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
 121         {
 122                 .ctrlr = &spi_ctrlr,
 123                 .bus_start = 0,
 124                 .bus_end = SPI_BUS_NUMBER - 1,
 125         },
 126         {
 127                 .ctrlr = &spi_flash_ctrlr,
 128                 .bus_start = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
 129                 .bus_end = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
 130         },
 131 };
 132
 133 const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map);