* [PATCH 1/2] soc: qcom: Add TCSR driver
2015-01-08 22:52 [PATCH 0/2] Add Qualcomm TCSR driver Andy Gross
@ 2015-01-08 22:52 ` Andy Gross
2015-01-08 23:39 ` Stephen Boyd
2015-01-09 0:06 ` Arnd Bergmann
2015-01-08 22:52 ` [PATCH 2/2] soc: qcom: Add device tree binding for TCSR Andy Gross
1 sibling, 2 replies; 8+ messages in thread
From: Andy Gross @ 2015-01-08 22:52 UTC (permalink / raw)
To: linux-arm-kernel
This patch adds support for the TCSR (Top Control and Status Register) IP block
that is present in the Qualcomm IPQ8064, APQ8064, and some later processors.
This block contains additional configuration and mux settings for various
peripherals in the system, including the ADM DMA block and USB controller.
Signed-off-by: Andy Gross <agross@codeaurora.org>
---
drivers/soc/qcom/Kconfig | 7 ++++
drivers/soc/qcom/Makefile | 1 +
drivers/soc/qcom/qcom_tcsr.c | 83 ++++++++++++++++++++++++++++++++++++++++++
include/soc/qcom/qcom_tcsr.h | 21 +++++++++++
4 files changed, 112 insertions(+)
create mode 100644 drivers/soc/qcom/qcom_tcsr.c
create mode 100644 include/soc/qcom/qcom_tcsr.h
diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
index 7bd2c94..950c218 100644
--- a/drivers/soc/qcom/Kconfig
+++ b/drivers/soc/qcom/Kconfig
@@ -9,3 +9,10 @@ config QCOM_GSBI
functions for connecting the underlying serial UART, SPI, and I2C
devices to the output pins.
+config QCOM_TCSR
+ tristate "QCOM Top Control and Status Registers"
+ depends on ARCH_QCOM
+ help
+ Say y here to enable TCSR support. The TCSR provides control
+ functions for various peripherals, like selection of USB port type and
+ GSBI CRCI muxing.
diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile
index 4389012..f0c287c 100644
--- a/drivers/soc/qcom/Makefile
+++ b/drivers/soc/qcom/Makefile
@@ -1 +1,2 @@
obj-$(CONFIG_QCOM_GSBI) += qcom_gsbi.o
+obj-$(CONFIG_QCOM_TCSR) += qcom_tcsr.o
diff --git a/drivers/soc/qcom/qcom_tcsr.c b/drivers/soc/qcom/qcom_tcsr.c
new file mode 100644
index 0000000..f8d5ef8
--- /dev/null
+++ b/drivers/soc/qcom/qcom_tcsr.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2014-2015, The Linux foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License rev 2 and
+ * only rev 2 as published by the free Software foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or fITNESS fOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <soc/qcom/qcom_tcsr.h>
+
+#define TCSR_ADM_A_CRCI_MUX_SEL 0x70
+#define TCSR_ADM_B_CRCI_MUX_SEL 0x74
+#define TCSR_USB_PORT_SEL 0xb0
+
+static int initialized;
+
+int qcom_tcsr_is_initialized(void)
+{
+ return !initialized;
+}
+EXPORT_SYMBOL(qcom_tcsr_is_initialized);
+
+static int qcom_tcsr_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ const struct device_node *node = pdev->dev.of_node;
+ void __iomem *base;
+ u32 val;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ if (!of_property_read_u32(node, "qcom,usb-ctrl-select", &val)) {
+ dev_info(&pdev->dev, "setting usb port select = %d\n", val);
+ writel(val, base + TCSR_USB_PORT_SEL);
+ }
+
+ if (!of_property_read_u32(node, "qcom,adm-a-crci-mux-sel", &val))
+ writel(val, base + TCSR_ADM_A_CRCI_MUX_SEL);
+
+ if (!of_property_read_u32(node, "qcom,adm-b-crci-mux-sel", &val))
+ writel(val, base + TCSR_ADM_B_CRCI_MUX_SEL);
+
+ initialized = 1;
+
+ return 0;
+}
+
+static const struct of_device_id qcom_tcsr_dt_match[] = {
+ { .compatible = "qcom,tcsr", },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, qcom_tcsr_dt_match);
+
+static struct platform_driver qcom_tcsr_driver = {
+ .driver = {
+ .name = "tcsr",
+ .owner = THIS_MODULE,
+ .of_match_table = qcom_tcsr_dt_match,
+ },
+ .probe = qcom_tcsr_probe,
+};
+
+module_platform_driver(qcom_tcsr_driver);
+
+MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
+MODULE_DESCRIPTION("QCOM TCSR driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/soc/qcom/qcom_tcsr.h b/include/soc/qcom/qcom_tcsr.h
new file mode 100644
index 0000000..cbdd3c8
--- /dev/null
+++ b/include/soc/qcom/qcom_tcsr.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2015, The Linux foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License rev 2 and
+ * only rev 2 as published by the free Software foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or fITNESS fOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef _QCOM_TCSR_H
+
+#ifdef CONFIG_QCOM_TCSR
+int qcom_tcsr_is_initialized(void);
+#else
+static inline int qcom_tcsr_is_initialized(void) {return -ENODEV; }
+#endif
+
+#endif
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH 2/2] soc: qcom: Add device tree binding for TCSR
2015-01-08 22:52 [PATCH 0/2] Add Qualcomm TCSR driver Andy Gross
2015-01-08 22:52 ` [PATCH 1/2] soc: qcom: Add " Andy Gross
@ 2015-01-08 22:52 ` Andy Gross
1 sibling, 0 replies; 8+ messages in thread
From: Andy Gross @ 2015-01-08 22:52 UTC (permalink / raw)
To: linux-arm-kernel
Add device tree binding support for the QCOM TCSR driver.
Signed-off-by: Andy Gross <agross@codeaurora.org>
---
.../devicetree/bindings/soc/qcom/qcom,tcsr.txt | 33 +++++++++++++++++++
include/dt-bindings/soc/qcom,tcsr.h | 34 ++++++++++++++++++++
2 files changed, 67 insertions(+)
create mode 100644 Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt
create mode 100644 include/dt-bindings/soc/qcom,tcsr.h
diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt b/Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt
new file mode 100644
index 0000000..782a307
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,tcsr.txt
@@ -0,0 +1,33 @@
+QCOM TCSR (Top Control and Status Register) Driver
+
+The TCSR provides miscellaneous control functions and status registers for
+Qualcomm processors.
+
+Required properties:
+- compatible: must contain "qcom,tcsr" for IPQ806x and APQ8064
+- reg: Address range for TCSR registers
+
+Optional properties:
+- qcom,usb-ctrl-select : indicates USB port type selection. Please reference
+ dt-bindings/soc/qcom,tcsr.h for valid USB port selection values.
+- qcom,adm-a-crci-mux-sel : indicates the CRCI mux settings for peripherals.
+ Please reference dt-bindings/soc/qcom,tcsr.h for valid selection values.
+- qcom,adm-b-crci-mux-sel : indicates the CRCI mux settings for peripherals.
+ Please reference dt-bindings/soc/qcom,tcsr.h for valid selection values.
+
+Example for IPQ8064:
+
+#include <dt-bindings/soc/qcom,tcsr.h>
+
+ tcsr: tcsr at 1a400000 {
+ compatible = "qcom,tcsr";
+ reg = <0x1a400000 0x100>;
+
+ qcom,usb-ctrl-select = <TCSR_USB_SELECT_USB3_DUAL>;
+ qcom,adm-a-crci-mux-sel =
+ < TCSR_ADM_CRCI_SEL(GSBI1, ADM_CRCI_QUP)>;
+ qcom,adm-b-crci-mux-sel =
+ < TCSR_ADM_CRCI_SEL(GSBI1, ADM_CRCI_QUP)>;
+ };
+
+
diff --git a/include/dt-bindings/soc/qcom,tcsr.h b/include/dt-bindings/soc/qcom,tcsr.h
new file mode 100644
index 0000000..8e18354
--- /dev/null
+++ b/include/dt-bindings/soc/qcom,tcsr.h
@@ -0,0 +1,34 @@
+/* Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef __DT_BINDINGS_QCOM_TCSR_H
+#define __DT_BINDINGS_QCOM_TCSR_H
+
+#define TCSR_USB_SELECT_USB3_P0 0x1
+#define TCSR_USB_SELECT_USB3_P1 0x2
+#define TCSR_USB_SELECT_USB3_DUAL 0x3
+
+#define GSBI1 1
+#define GSBI2 2
+#define GSBI3 3
+#define GSBI4 4
+#define GSBI5 5
+#define GSBI6 6
+#define GSBI7 7
+
+/* values are in pairs - RX/TX. So both are 0 or both are 1 */
+#define ADM_CRCI_QUP 0
+#define ADM_CRCI_UART 3
+
+/* calculate CRCI value by shifting the value by correct shift */
+#define TCSR_ADM_CRCI_SEL(gsbi, val) (val << (gsbi-1)*2)
+
+#endif
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
^ permalink raw reply related [flat|nested] 8+ messages in thread