From: MD Danish Anwar <danishanwar@ti.com>
To: "Andrew F. Davis" <afd@ti.com>, Suman Anna <s-anna@ti.com>,
Roger Quadros <rogerq@kernel.org>,
Vignesh Raghavendra <vigneshr@ti.com>,
MD Danish Anwar <danishanwar@ti.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
Santosh Shilimkar <ssantosh@kernel.org>,
Nishanth Menon <nm@ti.com>
Cc: <linux-remoteproc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-omap@vger.kernel.org>,
<srk@ti.com>, <devicetree@vger.kernel.org>,
<netdev@vger.kernel.org>
Subject: [PATCH v4 3/5] soc: ti: pruss: Add pruss_cfg_read()/update() API
Date: Mon, 13 Mar 2023 16:41:25 +0530 [thread overview]
Message-ID: <20230313111127.1229187-4-danishanwar@ti.com> (raw)
In-Reply-To: <20230313111127.1229187-1-danishanwar@ti.com>
From: Suman Anna <s-anna@ti.com>
Add two new generic API pruss_cfg_read() and pruss_cfg_update() to
the PRUSS platform driver to read and program respectively a register
within the PRUSS CFG sub-module represented by a syscon driver.
These APIs are internal to PRUSS driver. Various useful registers
and macros for certain register bit-fields and their values have also
been added.
Signed-off-by: Suman Anna <s-anna@ti.com>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: Puranjay Mohan <p-mohan@ti.com>
Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
---
drivers/soc/ti/pruss.c | 39 ++++++++++++++
include/linux/remoteproc/pruss.h | 87 ++++++++++++++++++++++++++++++++
2 files changed, 126 insertions(+)
diff --git a/drivers/soc/ti/pruss.c b/drivers/soc/ti/pruss.c
index c8053c0d735f..26d8129b515c 100644
--- a/drivers/soc/ti/pruss.c
+++ b/drivers/soc/ti/pruss.c
@@ -164,6 +164,45 @@ int pruss_release_mem_region(struct pruss *pruss,
}
EXPORT_SYMBOL_GPL(pruss_release_mem_region);
+/**
+ * pruss_cfg_read() - read a PRUSS CFG sub-module register
+ * @pruss: the pruss instance handle
+ * @reg: register offset within the CFG sub-module
+ * @val: pointer to return the value in
+ *
+ * Reads a given register within the PRUSS CFG sub-module and
+ * returns it through the passed-in @val pointer
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+static int pruss_cfg_read(struct pruss *pruss, unsigned int reg, unsigned int *val)
+{
+ if (IS_ERR_OR_NULL(pruss))
+ return -EINVAL;
+
+ return regmap_read(pruss->cfg_regmap, reg, val);
+}
+
+/**
+ * pruss_cfg_update() - configure a PRUSS CFG sub-module register
+ * @pruss: the pruss instance handle
+ * @reg: register offset within the CFG sub-module
+ * @mask: bit mask to use for programming the @val
+ * @val: value to write
+ *
+ * Programs a given register within the PRUSS CFG sub-module
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+static int pruss_cfg_update(struct pruss *pruss, unsigned int reg,
+ unsigned int mask, unsigned int val)
+{
+ if (IS_ERR_OR_NULL(pruss))
+ return -EINVAL;
+
+ return regmap_update_bits(pruss->cfg_regmap, reg, mask, val);
+}
+
static void pruss_of_free_clk_provider(void *data)
{
struct device_node *clk_mux_np = data;
diff --git a/include/linux/remoteproc/pruss.h b/include/linux/remoteproc/pruss.h
index 33f930e0a0ce..12ef10b9fe9a 100644
--- a/include/linux/remoteproc/pruss.h
+++ b/include/linux/remoteproc/pruss.h
@@ -10,12 +10,99 @@
#ifndef __LINUX_PRUSS_H
#define __LINUX_PRUSS_H
+#include <linux/bits.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/types.h>
#define PRU_RPROC_DRVNAME "pru-rproc"
+/*
+ * PRU_ICSS_CFG registers
+ * SYSCFG, ISRP, ISP, IESP, IECP, SCRP applicable on AMxxxx devices only
+ */
+#define PRUSS_CFG_REVID 0x00
+#define PRUSS_CFG_SYSCFG 0x04
+#define PRUSS_CFG_GPCFG(x) (0x08 + (x) * 4)
+#define PRUSS_CFG_CGR 0x10
+#define PRUSS_CFG_ISRP 0x14
+#define PRUSS_CFG_ISP 0x18
+#define PRUSS_CFG_IESP 0x1C
+#define PRUSS_CFG_IECP 0x20
+#define PRUSS_CFG_SCRP 0x24
+#define PRUSS_CFG_PMAO 0x28
+#define PRUSS_CFG_MII_RT 0x2C
+#define PRUSS_CFG_IEPCLK 0x30
+#define PRUSS_CFG_SPP 0x34
+#define PRUSS_CFG_PIN_MX 0x40
+
+/* PRUSS_GPCFG register bits */
+#define PRUSS_GPCFG_PRU_GPO_SH_SEL BIT(25)
+
+#define PRUSS_GPCFG_PRU_DIV1_SHIFT 20
+#define PRUSS_GPCFG_PRU_DIV1_MASK GENMASK(24, 20)
+
+#define PRUSS_GPCFG_PRU_DIV0_SHIFT 15
+#define PRUSS_GPCFG_PRU_DIV0_MASK GENMASK(15, 19)
+
+#define PRUSS_GPCFG_PRU_GPO_MODE BIT(14)
+#define PRUSS_GPCFG_PRU_GPO_MODE_DIRECT 0
+#define PRUSS_GPCFG_PRU_GPO_MODE_SERIAL BIT(14)
+
+#define PRUSS_GPCFG_PRU_GPI_SB BIT(13)
+
+#define PRUSS_GPCFG_PRU_GPI_DIV1_SHIFT 8
+#define PRUSS_GPCFG_PRU_GPI_DIV1_MASK GENMASK(12, 8)
+
+#define PRUSS_GPCFG_PRU_GPI_DIV0_SHIFT 3
+#define PRUSS_GPCFG_PRU_GPI_DIV0_MASK GENMASK(7, 3)
+
+#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_POSITIVE 0
+#define PRUSS_GPCFG_PRU_GPI_CLK_MODE_NEGATIVE BIT(2)
+#define PRUSS_GPCFG_PRU_GPI_CLK_MODE BIT(2)
+
+#define PRUSS_GPCFG_PRU_GPI_MODE_MASK GENMASK(1, 0)
+#define PRUSS_GPCFG_PRU_GPI_MODE_SHIFT 0
+
+#define PRUSS_GPCFG_PRU_MUX_SEL_SHIFT 26
+#define PRUSS_GPCFG_PRU_MUX_SEL_MASK GENMASK(29, 26)
+
+/* PRUSS_MII_RT register bits */
+#define PRUSS_MII_RT_EVENT_EN BIT(0)
+
+/* PRUSS_SPP register bits */
+#define PRUSS_SPP_XFER_SHIFT_EN BIT(1)
+#define PRUSS_SPP_PRU1_PAD_HP_EN BIT(0)
+
+/*
+ * enum pruss_gp_mux_sel - PRUSS GPI/O Mux modes for the
+ * PRUSS_GPCFG0/1 registers
+ *
+ * NOTE: The below defines are the most common values, but there
+ * are some exceptions like on 66AK2G, where the RESERVED and MII2
+ * values are interchanged. Also, this bit-field does not exist on
+ * AM335x SoCs
+ */
+enum pruss_gp_mux_sel {
+ PRUSS_GP_MUX_SEL_GP = 0,
+ PRUSS_GP_MUX_SEL_ENDAT,
+ PRUSS_GP_MUX_SEL_RESERVED,
+ PRUSS_GP_MUX_SEL_SD,
+ PRUSS_GP_MUX_SEL_MII2,
+ PRUSS_GP_MUX_SEL_MAX,
+};
+
+/*
+ * enum pruss_gpi_mode - PRUSS GPI configuration modes, used
+ * to program the PRUSS_GPCFG0/1 registers
+ */
+enum pruss_gpi_mode {
+ PRUSS_GPI_MODE_DIRECT = 0,
+ PRUSS_GPI_MODE_PARALLEL,
+ PRUSS_GPI_MODE_28BIT_SHIFT,
+ PRUSS_GPI_MODE_MII,
+};
+
/**
* enum pruss_pru_id - PRU core identifiers
* @PRUSS_PRU0: PRU Core 0.
--
2.25.1
next prev parent reply other threads:[~2023-03-13 11:12 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-13 11:11 [PATCH v4 0/5] Introduce PRU platform consumer API MD Danish Anwar
2023-03-13 11:11 ` [PATCH v4 1/5] soc: ti: pruss: Add pruss_get()/put() API MD Danish Anwar
2023-03-13 16:19 ` Andrew Davis
2023-03-13 11:11 ` [PATCH v4 2/5] soc: ti: pruss: Add pruss_{request,release}_mem_region() API MD Danish Anwar
2023-03-17 8:56 ` Roger Quadros
2023-03-20 5:11 ` [EXTERNAL] " Md Danish Anwar
2023-03-20 16:18 ` Andrew Davis
2023-03-21 5:23 ` Md Danish Anwar
2023-03-21 9:24 ` Roger Quadros
2023-03-21 9:48 ` [EXTERNAL] " Md Danish Anwar
2023-03-21 10:23 ` Roger Quadros
2023-03-21 10:45 ` Md Danish Anwar
2023-03-13 11:11 ` MD Danish Anwar [this message]
2023-03-15 12:07 ` [PATCH v4 3/5] soc: ti: pruss: Add pruss_cfg_read()/update() API Roger Quadros
2023-03-16 11:08 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 11:29 ` Md Danish Anwar
2023-03-16 11:32 ` Roger Quadros
2023-03-16 11:34 ` [EXTERNAL] " Md Danish Anwar
2023-03-13 11:11 ` [PATCH v4 4/5] soc: ti: pruss: Add helper functions to set GPI mode, MII_RT_event and XFR MD Danish Anwar
2023-03-15 12:22 ` Roger Quadros
2023-03-16 11:05 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 11:36 ` Roger Quadros
2023-03-16 11:44 ` Md Danish Anwar
2023-03-16 12:19 ` Roger Quadros
2023-03-16 13:11 ` [EXTERNAL] " Md Danish Anwar
2023-03-16 14:04 ` Roger Quadros
2023-03-17 5:02 ` [EXTERNAL] " Md Danish Anwar
2023-03-17 8:31 ` Roger Quadros
2023-03-17 8:55 ` [EXTERNAL] " Md Danish Anwar
2023-03-13 11:11 ` [PATCH v4 5/5] soc: ti: pruss: Add helper functions to get/set PRUSS_CFG_GPMUX MD Danish Anwar
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