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250 lines
6.8 KiB
Diff
250 lines
6.8 KiB
Diff
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
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+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,gsbi.txt
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@@ -6,7 +6,8 @@ configuration settings. The mode settin
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the 4 GSBI IOs.
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Required properties:
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-- compatible: must contain "qcom,gsbi-v1.0.0" for APQ8064/IPQ8064
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+- compatible: Should contain "qcom,gsbi-v1.0.0"
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+- cell-index: Should contain the GSBI index
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- reg: Address range for GSBI registers
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- clocks: required clock
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- clock-names: must contain "iface" entry
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@@ -16,6 +17,8 @@ Required properties:
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Optional properties:
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- qcom,crci : indicates CRCI MUX value for QUP CRCI ports. Please reference
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dt-bindings/soc/qcom,gsbi.h for valid CRCI mux values.
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+- syscon-tcsr: indicates phandle of TCSR syscon node. Required if child uses
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+ dma.
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Required properties if child node exists:
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- #address-cells: Must be 1
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@@ -39,6 +42,7 @@ Example for APQ8064:
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gsbi4@16300000 {
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compatible = "qcom,gsbi-v1.0.0";
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+ cell-index = <4>;
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reg = <0x16300000 0x100>;
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clocks = <&gcc GSBI4_H_CLK>;
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clock-names = "iface";
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@@ -48,6 +52,8 @@ Example for APQ8064:
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qcom,mode = <GSBI_PROT_I2C_UART>;
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qcom,crci = <GSBI_CRCI_QUP>;
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+ syscon-tcsr = <&tcsr>;
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+
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/* child nodes go under here */
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i2c_qup4: i2c@16380000 {
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@@ -76,3 +82,9 @@ Example for APQ8064:
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};
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};
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+ tcsr: syscon@1a400000 {
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+ compatible = "qcom,apq8064-tcsr", "syscon";
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+ reg = <0x1a400000 0x100>;
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+ };
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+
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+
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--- a/drivers/soc/qcom/Kconfig
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+++ b/drivers/soc/qcom/Kconfig
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@@ -4,6 +4,7 @@
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config QCOM_GSBI
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tristate "QCOM General Serial Bus Interface"
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depends on ARCH_QCOM
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+ select MFD_SYSCON
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help
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Say y here to enable GSBI support. The GSBI provides control
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functions for connecting the underlying serial UART, SPI, and I2C
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--- a/drivers/soc/qcom/qcom_gsbi.c
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+++ b/drivers/soc/qcom/qcom_gsbi.c
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@@ -18,22 +18,129 @@
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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+#include <linux/regmap.h>
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+#include <linux/mfd/syscon.h>
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+#include <dt-bindings/soc/qcom,gsbi.h>
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#define GSBI_CTRL_REG 0x0000
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#define GSBI_PROTOCOL_SHIFT 4
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+#define MAX_GSBI 12
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+
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+#define TCSR_ADM_CRCI_BASE 0x70
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+
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+struct crci_config {
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+ u32 num_rows;
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+ const u32 (*array)[MAX_GSBI];
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+};
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+
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+static const u32 crci_ipq8064[][MAX_GSBI] = {
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+ {
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+ {
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+};
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+
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+static const struct crci_config config_ipq8064 = {
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+ .num_rows = ARRAY_SIZE(crci_ipq8064),
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+ .array = crci_ipq8064,
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+};
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+
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+static const unsigned int crci_apq8064[][MAX_GSBI] = {
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+ {
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+ 0x001800, 0x006000, 0x000030, 0x0000c0,
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+ 0x000300, 0x000400, 0x000000, 0x000000,
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+ 0x000000, 0x000000, 0x000000, 0x000000
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+ },
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+ {
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+ 0x000000, 0x000000, 0x000000, 0x000000,
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+ 0x000000, 0x000020, 0x0000c0, 0x000000,
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+ 0x000000, 0x000000, 0x000000, 0x000000
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+ },
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+};
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+
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+static const struct crci_config config_apq8064 = {
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+ .num_rows = ARRAY_SIZE(crci_apq8064),
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+ .array = crci_apq8064,
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+};
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+
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+static const unsigned int crci_msm8960[][MAX_GSBI] = {
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+ {
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000400, 0x000000, 0x000000,
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+ 0x000000, 0x000000, 0x000000, 0x000000
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+ },
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+ {
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+ 0x000000, 0x000000, 0x000000, 0x000000,
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+ 0x000000, 0x000020, 0x0000c0, 0x000300,
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+ 0x001800, 0x006000, 0x000000, 0x000000
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+ },
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+};
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+
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+static const struct crci_config config_msm8960 = {
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+ .num_rows = ARRAY_SIZE(crci_msm8960),
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+ .array = crci_msm8960,
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+};
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+
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+static const unsigned int crci_msm8660[][MAX_GSBI] = {
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+ { /* ADM 0 - B */
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+ { /* ADM 0 - B */
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+ { /* ADM 1 - A */
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+ { /* ADM 1 - B */
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+ 0x000003, 0x00000c, 0x000030, 0x0000c0,
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+ 0x000300, 0x000c00, 0x003000, 0x00c000,
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+ 0x030000, 0x0c0000, 0x300000, 0xc00000
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+ },
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+};
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+
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+static const struct crci_config config_msm8660 = {
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+ .num_rows = ARRAY_SIZE(crci_msm8660),
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+ .array = crci_msm8660,
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+};
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struct gsbi_info {
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struct clk *hclk;
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u32 mode;
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u32 crci;
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+ struct regmap *tcsr;
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+};
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+
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+static const struct of_device_id tcsr_dt_match[] = {
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+ { .compatible = "qcom,tcsr-ipq8064", .data = &config_ipq8064},
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+ { .compatible = "qcom,tcsr-apq8064", .data = &config_apq8064},
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+ { .compatible = "qcom,tcsr-msm8960", .data = &config_msm8960},
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+ { .compatible = "qcom,tcsr-msm8660", .data = &config_msm8660},
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+ { },
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};
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static int gsbi_probe(struct platform_device *pdev)
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{
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struct device_node *node = pdev->dev.of_node;
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+ struct device_node *tcsr_node;
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+ const struct of_device_id *match;
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struct resource *res;
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void __iomem *base;
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struct gsbi_info *gsbi;
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+ int i;
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+ u32 mask, gsbi_num;
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+ const struct crci_config *config = NULL;
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gsbi = devm_kzalloc(&pdev->dev, sizeof(*gsbi), GFP_KERNEL);
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@@ -45,6 +152,32 @@ static int gsbi_probe(struct platform_de
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if (IS_ERR(base))
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return PTR_ERR(base);
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+ /* get the tcsr node and setup the config and regmap */
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+ gsbi->tcsr = syscon_regmap_lookup_by_phandle(node, "syscon-tcsr");
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+
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+ if (!IS_ERR(gsbi->tcsr)) {
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+ tcsr_node = of_parse_phandle(node, "syscon-tcsr", 0);
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+ if (tcsr_node) {
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+ match = of_match_node(tcsr_dt_match, tcsr_node);
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+ if (match)
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+ config = match->data;
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+ else
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+ dev_warn(&pdev->dev, "no matching TCSR\n");
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+
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+ of_node_put(tcsr_node);
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+ }
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+ }
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+
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+ if (of_property_read_u32(node, "cell-index", &gsbi_num)) {
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+ dev_err(&pdev->dev, "missing cell-index\n");
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+ return -EINVAL;
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+ }
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+
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+ if (gsbi_num < 1 || gsbi_num > MAX_GSBI) {
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+ dev_err(&pdev->dev, "invalid cell-index\n");
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+ return -EINVAL;
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+ }
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+
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if (of_property_read_u32(node, "qcom,mode", &gsbi->mode)) {
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dev_err(&pdev->dev, "missing mode configuration\n");
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return -EINVAL;
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@@ -64,6 +197,25 @@ static int gsbi_probe(struct platform_de
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writel_relaxed((gsbi->mode << GSBI_PROTOCOL_SHIFT) | gsbi->crci,
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base + GSBI_CTRL_REG);
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+ /*
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+ * modify tcsr to reflect mode and ADM CRCI mux
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+ * Each gsbi contains a pair of bits, one for RX and one for TX
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+ * SPI mode requires both bits cleared, otherwise they are set
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+ */
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+ if (config) {
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+ for (i = 0; i < config->num_rows; i++) {
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+ mask = config->array[i][gsbi_num - 1];
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+
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+ if (gsbi->mode == GSBI_PROT_SPI)
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+ regmap_update_bits(gsbi->tcsr,
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+ TCSR_ADM_CRCI_BASE + 4 * i, mask, 0);
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+ else
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+ regmap_update_bits(gsbi->tcsr,
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+ TCSR_ADM_CRCI_BASE + 4 * i, mask, mask);
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+
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+ }
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+ }
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+
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/* make sure the gsbi control write is not reordered */
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wmb();
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