target/linux/ipq806x/patches-3.18/102-soc-qcom-gsbi-Add-support-for-ADM-CRCI-muxing.patch

   1 diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
   2 index 4ce24d4..186e5f4 100644
   3 --- a/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
   4 +++ b/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
   5 @@ -6,7 +6,8 @@ configuration settings.  The mode setting will govern the input/output mode of
   6  the 4 GSBI IOs.
   7
   8  Required properties:
   9 -- compatible: must contain "qcom,gsbi-v1.0.0" for APQ8064/IPQ8064
  10 +- compatible:  Should contain "qcom,gsbi-v1.0.0"
  11 +- cell-index:  Should contain the GSBI index
  12  - reg: Address range for GSBI registers
  13  - clocks: required clock
  14  - clock-names: must contain "iface" entry
  15 @@ -16,6 +17,8 @@ Required properties:
  16  Optional properties:
  17  - qcom,crci : indicates CRCI MUX value for QUP CRCI ports.  Please reference
  18    dt-bindings/soc/qcom,gsbi.h for valid CRCI mux values.
  19 +- syscon-tcsr: indicates phandle of TCSR syscon node.  Required if child uses
  20 +  dma.
  21
  22  Required properties if child node exists:
  23  - #address-cells: Must be 1
  24 @@ -39,6 +42,7 @@ Example for APQ8064:
  25
  26         gsbi4@16300000 {
  27                 compatible = "qcom,gsbi-v1.0.0";
  28 +               cell-index = <4>;
  29                 reg = <0x16300000 0x100>;
  30                 clocks = <&gcc GSBI4_H_CLK>;
  31                 clock-names = "iface";
  32 @@ -48,6 +52,8 @@ Example for APQ8064:
  33                 qcom,mode = <GSBI_PROT_I2C_UART>;
  34                 qcom,crci = <GSBI_CRCI_QUP>;
  35
  36 +               syscon-tcsr = <&tcsr>;
  37 +
  38                 /* child nodes go under here */
  39
  40                 i2c_qup4: i2c@16380000 {
  41 @@ -76,3 +82,9 @@ Example for APQ8064:
  42                 };
  43         };
  44
  45 +       tcsr: syscon@1a400000 {
  46 +               compatible = "qcom,apq8064-tcsr", "syscon";
  47 +               reg = <0x1a400000 0x100>;
  48 +       };
  49 +
  50 +
  51 diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
  52 index 7bd2c94..460b2db 100644
  53 --- a/drivers/soc/qcom/Kconfig
  54 +++ b/drivers/soc/qcom/Kconfig
  55 @@ -4,6 +4,7 @@
  56  config QCOM_GSBI
  57          tristate "QCOM General Serial Bus Interface"
  58          depends on ARCH_QCOM
  59 +        select MFD_SYSCON
  60          help
  61            Say y here to enable GSBI support.  The GSBI provides control
  62            functions for connecting the underlying serial UART, SPI, and I2C
  63 diff --git a/drivers/soc/qcom/qcom_gsbi.c b/drivers/soc/qcom/qcom_gsbi.c
  64 index 729425d..09c669e 100644
  65 --- a/drivers/soc/qcom/qcom_gsbi.c
  66 +++ b/drivers/soc/qcom/qcom_gsbi.c
  67 @@ -18,22 +18,129 @@
  68  #include <linux/of.h>
  69  #include <linux/of_platform.h>
  70  #include <linux/platform_device.h>
  71 +#include <linux/regmap.h>
  72 +#include <linux/mfd/syscon.h>
  73 +#include <dt-bindings/soc/qcom,gsbi.h>
  74
  75  #define GSBI_CTRL_REG          0x0000
  76  #define GSBI_PROTOCOL_SHIFT    4
  77 +#define MAX_GSBI               12
  78 +
  79 +#define TCSR_ADM_CRCI_BASE     0x70
  80 +
  81 +struct crci_config {
  82 +       u32 num_rows;
  83 +       const u32 (*array)[MAX_GSBI];
  84 +};
  85 +
  86 +static const u32 crci_ipq8064[][MAX_GSBI] = {
  87 +       {
  88 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
  89 +               0x000300, 0x000c00, 0x003000, 0x00c000,
  90 +               0x030000, 0x0c0000, 0x300000, 0xc00000
  91 +       },
  92 +       {
  93 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
  94 +               0x000300, 0x000c00, 0x003000, 0x00c000,
  95 +               0x030000, 0x0c0000, 0x300000, 0xc00000
  96 +       },
  97 +};
  98 +
  99 +static const struct crci_config config_ipq8064 = {
 100 +       .num_rows = ARRAY_SIZE(crci_ipq8064),
 101 +       .array = crci_ipq8064,
 102 +};
 103 +
 104 +static const unsigned int crci_apq8064[][MAX_GSBI] = {
 105 +       {
 106 +               0x001800, 0x006000, 0x000030, 0x0000c0,
 107 +               0x000300, 0x000400, 0x000000, 0x000000,
 108 +               0x000000, 0x000000, 0x000000, 0x000000
 109 +       },
 110 +       {
 111 +               0x000000, 0x000000, 0x000000, 0x000000,
 112 +               0x000000, 0x000020, 0x0000c0, 0x000000,
 113 +               0x000000, 0x000000, 0x000000, 0x000000
 114 +       },
 115 +};
 116 +
 117 +static const struct crci_config config_apq8064 = {
 118 +       .num_rows = ARRAY_SIZE(crci_apq8064),
 119 +       .array = crci_apq8064,
 120 +};
 121 +
 122 +static const unsigned int crci_msm8960[][MAX_GSBI] = {
 123 +       {
 124 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
 125 +               0x000300, 0x000400, 0x000000, 0x000000,
 126 +               0x000000, 0x000000, 0x000000, 0x000000
 127 +       },
 128 +       {
 129 +               0x000000, 0x000000, 0x000000, 0x000000,
 130 +               0x000000, 0x000020, 0x0000c0, 0x000300,
 131 +               0x001800, 0x006000, 0x000000, 0x000000
 132 +       },
 133 +};
 134 +
 135 +static const struct crci_config config_msm8960 = {
 136 +       .num_rows = ARRAY_SIZE(crci_msm8960),
 137 +       .array = crci_msm8960,
 138 +};
 139 +
 140 +static const unsigned int crci_msm8660[][MAX_GSBI] = {
 141 +       {       /* ADM 0 - B */
 142 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
 143 +               0x000300, 0x000c00, 0x003000, 0x00c000,
 144 +               0x030000, 0x0c0000, 0x300000, 0xc00000
 145 +       },
 146 +       {       /* ADM 0 - B */
 147 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
 148 +               0x000300, 0x000c00, 0x003000, 0x00c000,
 149 +               0x030000, 0x0c0000, 0x300000, 0xc00000
 150 +       },
 151 +       {       /* ADM 1 - A */
 152 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
 153 +               0x000300, 0x000c00, 0x003000, 0x00c000,
 154 +               0x030000, 0x0c0000, 0x300000, 0xc00000
 155 +       },
 156 +       {       /* ADM 1 - B */
 157 +               0x000003, 0x00000c, 0x000030, 0x0000c0,
 158 +               0x000300, 0x000c00, 0x003000, 0x00c000,
 159 +               0x030000, 0x0c0000, 0x300000, 0xc00000
 160 +       },
 161 +};
 162 +
 163 +static const struct crci_config config_msm8660 = {
 164 +       .num_rows = ARRAY_SIZE(crci_msm8660),
 165 +       .array = crci_msm8660,
 166 +};
 167
 168  struct gsbi_info {
 169         struct clk *hclk;
 170         u32 mode;
 171         u32 crci;
 172 +       struct regmap *tcsr;
 173 +};
 174 +
 175 +static const struct of_device_id tcsr_dt_match[] = {
 176 +       { .compatible = "qcom,tcsr-ipq8064", .data = &config_ipq8064},
 177 +       { .compatible = "qcom,tcsr-apq8064", .data = &config_apq8064},
 178 +       { .compatible = "qcom,tcsr-msm8960", .data = &config_msm8960},
 179 +       { .compatible = "qcom,tcsr-msm8660", .data = &config_msm8660},
 180 +       { },
 181  };
 182
 183  static int gsbi_probe(struct platform_device *pdev)
 184  {
 185         struct device_node *node = pdev->dev.of_node;
 186 +       struct device_node *tcsr_node;
 187 +       const struct of_device_id *match;
 188         struct resource *res;
 189         void __iomem *base;
 190         struct gsbi_info *gsbi;
 191 +       int i;
 192 +       u32 mask, gsbi_num;
 193 +       const struct crci_config *config = NULL;
 194
 195         gsbi = devm_kzalloc(&pdev->dev, sizeof(*gsbi), GFP_KERNEL);
 196
 197 @@ -45,6 +152,32 @@ static int gsbi_probe(struct platform_device *pdev)
 198         if (IS_ERR(base))
 199                 return PTR_ERR(base);
 200
 201 +       /* get the tcsr node and setup the config and regmap */
 202 +       gsbi->tcsr = syscon_regmap_lookup_by_phandle(node, "syscon-tcsr");
 203 +
 204 +       if (!IS_ERR(gsbi->tcsr)) {
 205 +               tcsr_node = of_parse_phandle(node, "syscon-tcsr", 0);
 206 +               if (tcsr_node) {
 207 +                       match = of_match_node(tcsr_dt_match, tcsr_node);
 208 +                       if (match)
 209 +                               config = match->data;
 210 +                       else
 211 +                               dev_warn(&pdev->dev, "no matching TCSR\n");
 212 +
 213 +                       of_node_put(tcsr_node);
 214 +               }
 215 +       }
 216 +
 217 +       if (of_property_read_u32(node, "cell-index", &gsbi_num)) {
 218 +               dev_err(&pdev->dev, "missing cell-index\n");
 219 +               return -EINVAL;
 220 +       }
 221 +
 222 +       if (gsbi_num < 1 || gsbi_num > MAX_GSBI) {
 223 +               dev_err(&pdev->dev, "invalid cell-index\n");
 224 +               return -EINVAL;
 225 +       }
 226 +
 227         if (of_property_read_u32(node, "qcom,mode", &gsbi->mode)) {
 228                 dev_err(&pdev->dev, "missing mode configuration\n");
 229                 return -EINVAL;
 230 @@ -64,6 +197,25 @@ static int gsbi_probe(struct platform_device *pdev)
 231         writel_relaxed((gsbi->mode << GSBI_PROTOCOL_SHIFT) | gsbi->crci,
 232                                 base + GSBI_CTRL_REG);
 233
 234 +       /*
 235 +        * modify tcsr to reflect mode and ADM CRCI mux
 236 +        * Each gsbi contains a pair of bits, one for RX and one for TX
 237 +        * SPI mode requires both bits cleared, otherwise they are set
 238 +        */
 239 +       if (config) {
 240 +               for (i = 0; i < config->num_rows; i++) {
 241 +                       mask = config->array[i][gsbi_num - 1];
 242 +
 243 +                       if (gsbi->mode == GSBI_PROT_SPI)
 244 +                               regmap_update_bits(gsbi->tcsr,
 245 +                                       TCSR_ADM_CRCI_BASE + 4 * i, mask, 0);
 246 +                       else
 247 +                               regmap_update_bits(gsbi->tcsr,
 248 +                                       TCSR_ADM_CRCI_BASE + 4 * i, mask, mask);
 249 +
 250 +               }
 251 +       }
 252 +
 253         /* make sure the gsbi control write is not reordered */
 254         wmb();
 255
 256 --
 257 1.9.1
 258