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-rw-r--r--Documentation/devicetree/bindings/spi/fsl-spi.txt2
-rw-r--r--Documentation/devicetree/bindings/vendor-prefixes.txt1
-rw-r--r--drivers/spi/Kconfig4
-rw-r--r--drivers/spi/spi-fsl-spi.c98
-rw-r--r--drivers/spi/spi-fsl-spi.h13
5 files changed, 103 insertions, 15 deletions
diff --git a/Documentation/devicetree/bindings/spi/fsl-spi.txt b/Documentation/devicetree/bindings/spi/fsl-spi.txt
index 4f2ea9461797..b032dd76e9d2 100644
--- a/Documentation/devicetree/bindings/spi/fsl-spi.txt
+++ b/Documentation/devicetree/bindings/spi/fsl-spi.txt
@@ -4,7 +4,7 @@ Required properties:
- cell-index : QE SPI subblock index.
0: QE subblock SPI1
1: QE subblock SPI2
-- compatible : should be "fsl,spi".
+- compatible : should be "fsl,spi" or "aeroflexgaisler,spictrl".
- mode : the SPI operation mode, it can be "cpu" or "cpu-qe".
- reg : Offset and length of the register set for the device
- interrupts : <a b> where a is the interrupt number and b is a
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 19e1ef73ab0d..3b3b0194adfe 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -5,6 +5,7 @@ using them to avoid name-space collisions.
ad Avionic Design GmbH
adi Analog Devices, Inc.
+aeroflexgaisler Aeroflex Gaisler AB
ak Asahi Kasei Corp.
amcc Applied Micro Circuits Corporation (APM, formally AMCC)
apm Applied Micro Circuits Corporation (APM)
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 3524bec5ae5b..2946ab4736f6 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -236,7 +236,7 @@ config SPI_FSL_CPM
depends on FSL_SOC
config SPI_FSL_SPI
- bool "Freescale SPI controller"
+ bool "Freescale SPI controller and Aeroflex Gaisler GRLIB SPI controller"
depends on OF
select SPI_FSL_LIB
select SPI_FSL_CPM if FSL_SOC
@@ -244,6 +244,8 @@ config SPI_FSL_SPI
This enables using the Freescale SPI controllers in master mode.
MPC83xx platform uses the controller in cpu mode or CPM/QE mode.
MPC8569 uses the controller in QE mode, MPC8610 in cpu mode.
+ This also enables using the Aeroflex Gaisler GRLIB SPI controller in
+ master mode.
config SPI_FSL_ESPI
bool "Freescale eSPI controller"
diff --git a/drivers/spi/spi-fsl-spi.c b/drivers/spi/spi-fsl-spi.c
index 7eff63a284ff..6846459e5c9d 100644
--- a/drivers/spi/spi-fsl-spi.c
+++ b/drivers/spi/spi-fsl-spi.c
@@ -10,6 +10,10 @@
* Copyright (c) 2009 MontaVista Software, Inc.
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
+ * GRLIB support:
+ * Copyright (c) 2012 Aeroflex Gaisler AB.
+ * Author: Andreas Larsson <andreas@gaisler.com>
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
@@ -40,6 +44,7 @@
#include "spi-fsl-spi.h"
#define TYPE_FSL 0
+#define TYPE_GRLIB 1
struct fsl_spi_match_data {
int type;
@@ -49,11 +54,19 @@ static struct fsl_spi_match_data of_fsl_spi_fsl_config = {
.type = TYPE_FSL,
};
+static struct fsl_spi_match_data of_fsl_spi_grlib_config = {
+ .type = TYPE_GRLIB,
+};
+
static struct of_device_id of_fsl_spi_match[] = {
{
.compatible = "fsl,spi",
.data = &of_fsl_spi_fsl_config,
},
+ {
+ .compatible = "aeroflexgaisler,spictrl",
+ .data = &of_fsl_spi_grlib_config,
+ },
{}
};
MODULE_DEVICE_TABLE(of, of_fsl_spi_match);
@@ -141,6 +154,21 @@ static void fsl_spi_qe_cpu_set_shifts(u32 *rx_shift, u32 *tx_shift,
}
}
+static void fsl_spi_grlib_set_shifts(u32 *rx_shift, u32 *tx_shift,
+ int bits_per_word, int msb_first)
+{
+ *rx_shift = 0;
+ *tx_shift = 0;
+ if (bits_per_word <= 16) {
+ if (msb_first) {
+ *rx_shift = 16; /* LSB in bit 16 */
+ *tx_shift = 32 - bits_per_word; /* MSB in bit 31 */
+ } else {
+ *rx_shift = 16 - bits_per_word; /* MSB in bit 15 */
+ }
+ }
+}
+
static int mspi_apply_cpu_mode_quirks(struct spi_mpc8xxx_cs *cs,
struct spi_device *spi,
struct mpc8xxx_spi *mpc8xxx_spi,
@@ -494,6 +522,42 @@ static void fsl_spi_remove(struct mpc8xxx_spi *mspi)
fsl_spi_cpm_free(mspi);
}
+static void fsl_spi_grlib_cs_control(struct spi_device *spi, bool on)
+{
+ struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(spi->master);
+ struct fsl_spi_reg *reg_base = mpc8xxx_spi->reg_base;
+ u32 slvsel;
+ u16 cs = spi->chip_select;
+
+ slvsel = mpc8xxx_spi_read_reg(&reg_base->slvsel);
+ slvsel = on ? (slvsel | (1 << cs)) : (slvsel & ~(1 << cs));
+ mpc8xxx_spi_write_reg(&reg_base->slvsel, slvsel);
+}
+
+static void fsl_spi_grlib_probe(struct device *dev)
+{
+ struct fsl_spi_platform_data *pdata = dev->platform_data;
+ struct spi_master *master = dev_get_drvdata(dev);
+ struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master);
+ struct fsl_spi_reg *reg_base = mpc8xxx_spi->reg_base;
+ int mbits;
+ u32 capabilities;
+
+ capabilities = mpc8xxx_spi_read_reg(&reg_base->cap);
+
+ mpc8xxx_spi->set_shifts = fsl_spi_grlib_set_shifts;
+ mbits = SPCAP_MAXWLEN(capabilities);
+ if (mbits)
+ mpc8xxx_spi->max_bits_per_word = mbits + 1;
+
+ master->num_chipselect = 1; /* Allow for an always selected chip */
+ if (SPCAP_SSEN(capabilities)) {
+ master->num_chipselect = SPCAP_SSSZ(capabilities);
+ mpc8xxx_spi_write_reg(&reg_base->slvsel, 0xffffffff);
+ }
+ pdata->cs_control = fsl_spi_grlib_cs_control;
+}
+
static struct spi_master * fsl_spi_probe(struct device *dev,
struct resource *mem, unsigned int irq)
{
@@ -528,6 +592,15 @@ static struct spi_master * fsl_spi_probe(struct device *dev,
if (ret)
goto err_cpm_init;
+ mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem));
+ if (mpc8xxx_spi->reg_base == NULL) {
+ ret = -ENOMEM;
+ goto err_ioremap;
+ }
+
+ if (mpc8xxx_spi->type == TYPE_GRLIB)
+ fsl_spi_grlib_probe(dev);
+
if (mpc8xxx_spi->flags & SPI_QE_CPU_MODE)
mpc8xxx_spi->set_shifts = fsl_spi_qe_cpu_set_shifts;
@@ -536,12 +609,6 @@ static struct spi_master * fsl_spi_probe(struct device *dev,
mpc8xxx_spi->set_shifts(&mpc8xxx_spi->rx_shift,
&mpc8xxx_spi->tx_shift, 8, 1);
- mpc8xxx_spi->reg_base = ioremap(mem->start, resource_size(mem));
- if (mpc8xxx_spi->reg_base == NULL) {
- ret = -ENOMEM;
- goto err_ioremap;
- }
-
/* Register for SPI Interrupt */
ret = request_irq(mpc8xxx_spi->irq, fsl_spi_irq,
0, "fsl_spi", mpc8xxx_spi);
@@ -706,16 +773,19 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
struct device_node *np = ofdev->dev.of_node;
struct spi_master *master;
struct resource mem;
- int irq;
+ int irq, type;
int ret = -ENOMEM;
ret = of_mpc8xxx_spi_probe(ofdev);
if (ret)
return ret;
- ret = of_fsl_spi_get_chipselects(dev);
- if (ret)
- goto err;
+ type = fsl_spi_get_type(&ofdev->dev);
+ if (type == TYPE_FSL) {
+ ret = of_fsl_spi_get_chipselects(dev);
+ if (ret)
+ goto err;
+ }
ret = of_address_to_resource(np, 0, &mem);
if (ret)
@@ -736,18 +806,22 @@ static int of_fsl_spi_probe(struct platform_device *ofdev)
return 0;
err:
- of_fsl_spi_free_chipselects(dev);
+ if (type == TYPE_FSL)
+ of_fsl_spi_free_chipselects(dev);
return ret;
}
static int of_fsl_spi_remove(struct platform_device *ofdev)
{
+ struct spi_master *master = dev_get_drvdata(&ofdev->dev);
+ struct mpc8xxx_spi *mpc8xxx_spi = spi_master_get_devdata(master);
int ret;
ret = mpc8xxx_spi_remove(&ofdev->dev);
if (ret)
return ret;
- of_fsl_spi_free_chipselects(&ofdev->dev);
+ if (mpc8xxx_spi->type == TYPE_FSL)
+ of_fsl_spi_free_chipselects(&ofdev->dev);
return 0;
}
diff --git a/drivers/spi/spi-fsl-spi.h b/drivers/spi/spi-fsl-spi.h
index 8bd73a4318ef..9a6dae00e3f3 100644
--- a/drivers/spi/spi-fsl-spi.h
+++ b/drivers/spi/spi-fsl-spi.h
@@ -10,6 +10,10 @@
* Copyright (c) 2009 MontaVista Software, Inc.
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
+ * GRLIB support:
+ * Copyright (c) 2012 Aeroflex Gaisler AB.
+ * Author: Andreas Larsson <andreas@gaisler.com>
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
@@ -21,13 +25,15 @@
/* SPI Controller registers */
struct fsl_spi_reg {
- u8 res1[0x20];
+ __be32 cap; /* TYPE_GRLIB specific */
+ u8 res1[0x1C];
__be32 mode;
__be32 event;
__be32 mask;
__be32 command;
__be32 transmit;
__be32 receive;
+ __be32 slvsel; /* TYPE_GRLIB specific */
};
/* SPI Controller mode register definitions */
@@ -43,6 +49,11 @@ struct fsl_spi_reg {
#define SPMODE_OP (1 << 14)
#define SPMODE_CG(x) ((x) << 7)
+/* TYPE_GRLIB SPI Controller capability register definitions */
+#define SPCAP_SSEN(x) (((x) >> 16) & 0x1)
+#define SPCAP_SSSZ(x) (((x) >> 24) & 0xff)
+#define SPCAP_MAXWLEN(x) (((x) >> 20) & 0xf)
+
/*
* Default for SPI Mode:
* SPI MODE 0 (inactive low, phase middle, MSB, 8-bit length, slow clk
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-19 22:21:12 +0300