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linux/drivers/pinctrl/pinctrl-tb10x.c
Masahiro Yamada 323de9efdf pinctrl: make pinctrl_register() return proper error code 
Currently, pinctrl_register() just returns NULL on error, so the
callers can not know the exact reason of the failure.

Some of the pinctrl drivers return -EINVAL, some -ENODEV, and some
-ENOMEM on error of pinctrl_register(), although the error code
might be different from the real cause of the error.

This commit reworks pinctrl_register() to return the appropriate
error code and modifies all of the pinctrl drivers to use IS_ERR()
for the error checking and PTR_ERR() for getting the error code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Ray Jui <rjui@broadcom.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Acked-by: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2015-06-10 14:49:52 +02:00

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/*
* Abilis Systems TB10x pin control driver
*
* Copyright (C) Abilis Systems 2012
*
* Author: Christian Ruppert <christian.ruppert@abilis.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/stringify.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/machine.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/slab.h>
#include "pinctrl-utils.h"
#define TB10X_PORT1 (0)
#define TB10X_PORT2 (16)
#define TB10X_PORT3 (32)
#define TB10X_PORT4 (48)
#define TB10X_PORT5 (128)
#define TB10X_PORT6 (64)
#define TB10X_PORT7 (80)
#define TB10X_PORT8 (96)
#define TB10X_PORT9 (112)
#define TB10X_GPIOS (256)
#define PCFG_PORT_BITWIDTH (2)
#define PCFG_PORT_MASK(PORT) \
(((1 << PCFG_PORT_BITWIDTH) - 1) << (PCFG_PORT_BITWIDTH * (PORT)))
static const struct pinctrl_pin_desc tb10x_pins[] = {
/* Port 1 */
PINCTRL_PIN(TB10X_PORT1 + 0, "MICLK_S0"),
PINCTRL_PIN(TB10X_PORT1 + 1, "MISTRT_S0"),
PINCTRL_PIN(TB10X_PORT1 + 2, "MIVAL_S0"),
PINCTRL_PIN(TB10X_PORT1 + 3, "MDI_S0"),
PINCTRL_PIN(TB10X_PORT1 + 4, "GPIOA0"),
PINCTRL_PIN(TB10X_PORT1 + 5, "GPIOA1"),
PINCTRL_PIN(TB10X_PORT1 + 6, "GPIOA2"),
PINCTRL_PIN(TB10X_PORT1 + 7, "MDI_S1"),
PINCTRL_PIN(TB10X_PORT1 + 8, "MIVAL_S1"),
PINCTRL_PIN(TB10X_PORT1 + 9, "MISTRT_S1"),
PINCTRL_PIN(TB10X_PORT1 + 10, "MICLK_S1"),
/* Port 2 */
PINCTRL_PIN(TB10X_PORT2 + 0, "MICLK_S2"),
PINCTRL_PIN(TB10X_PORT2 + 1, "MISTRT_S2"),
PINCTRL_PIN(TB10X_PORT2 + 2, "MIVAL_S2"),
PINCTRL_PIN(TB10X_PORT2 + 3, "MDI_S2"),
PINCTRL_PIN(TB10X_PORT2 + 4, "GPIOC0"),
PINCTRL_PIN(TB10X_PORT2 + 5, "GPIOC1"),
PINCTRL_PIN(TB10X_PORT2 + 6, "GPIOC2"),
PINCTRL_PIN(TB10X_PORT2 + 7, "MDI_S3"),
PINCTRL_PIN(TB10X_PORT2 + 8, "MIVAL_S3"),
PINCTRL_PIN(TB10X_PORT2 + 9, "MISTRT_S3"),
PINCTRL_PIN(TB10X_PORT2 + 10, "MICLK_S3"),
/* Port 3 */
PINCTRL_PIN(TB10X_PORT3 + 0, "MICLK_S4"),
PINCTRL_PIN(TB10X_PORT3 + 1, "MISTRT_S4"),
PINCTRL_PIN(TB10X_PORT3 + 2, "MIVAL_S4"),
PINCTRL_PIN(TB10X_PORT3 + 3, "MDI_S4"),
PINCTRL_PIN(TB10X_PORT3 + 4, "GPIOE0"),
PINCTRL_PIN(TB10X_PORT3 + 5, "GPIOE1"),
PINCTRL_PIN(TB10X_PORT3 + 6, "GPIOE2"),
PINCTRL_PIN(TB10X_PORT3 + 7, "MDI_S5"),
PINCTRL_PIN(TB10X_PORT3 + 8, "MIVAL_S5"),
PINCTRL_PIN(TB10X_PORT3 + 9, "MISTRT_S5"),
PINCTRL_PIN(TB10X_PORT3 + 10, "MICLK_S5"),
/* Port 4 */
PINCTRL_PIN(TB10X_PORT4 + 0, "MICLK_S6"),
PINCTRL_PIN(TB10X_PORT4 + 1, "MISTRT_S6"),
PINCTRL_PIN(TB10X_PORT4 + 2, "MIVAL_S6"),
PINCTRL_PIN(TB10X_PORT4 + 3, "MDI_S6"),
PINCTRL_PIN(TB10X_PORT4 + 4, "GPIOG0"),
PINCTRL_PIN(TB10X_PORT4 + 5, "GPIOG1"),
PINCTRL_PIN(TB10X_PORT4 + 6, "GPIOG2"),
PINCTRL_PIN(TB10X_PORT4 + 7, "MDI_S7"),
PINCTRL_PIN(TB10X_PORT4 + 8, "MIVAL_S7"),
PINCTRL_PIN(TB10X_PORT4 + 9, "MISTRT_S7"),
PINCTRL_PIN(TB10X_PORT4 + 10, "MICLK_S7"),
/* Port 5 */
PINCTRL_PIN(TB10X_PORT5 + 0, "PC_CE1N"),
PINCTRL_PIN(TB10X_PORT5 + 1, "PC_CE2N"),
PINCTRL_PIN(TB10X_PORT5 + 2, "PC_REGN"),
PINCTRL_PIN(TB10X_PORT5 + 3, "PC_INPACKN"),
PINCTRL_PIN(TB10X_PORT5 + 4, "PC_OEN"),
PINCTRL_PIN(TB10X_PORT5 + 5, "PC_WEN"),
PINCTRL_PIN(TB10X_PORT5 + 6, "PC_IORDN"),
PINCTRL_PIN(TB10X_PORT5 + 7, "PC_IOWRN"),
PINCTRL_PIN(TB10X_PORT5 + 8, "PC_RDYIRQN"),
PINCTRL_PIN(TB10X_PORT5 + 9, "PC_WAITN"),
PINCTRL_PIN(TB10X_PORT5 + 10, "PC_A0"),
PINCTRL_PIN(TB10X_PORT5 + 11, "PC_A1"),
PINCTRL_PIN(TB10X_PORT5 + 12, "PC_A2"),
PINCTRL_PIN(TB10X_PORT5 + 13, "PC_A3"),
PINCTRL_PIN(TB10X_PORT5 + 14, "PC_A4"),
PINCTRL_PIN(TB10X_PORT5 + 15, "PC_A5"),
PINCTRL_PIN(TB10X_PORT5 + 16, "PC_A6"),
PINCTRL_PIN(TB10X_PORT5 + 17, "PC_A7"),
PINCTRL_PIN(TB10X_PORT5 + 18, "PC_A8"),
PINCTRL_PIN(TB10X_PORT5 + 19, "PC_A9"),
PINCTRL_PIN(TB10X_PORT5 + 20, "PC_A10"),
PINCTRL_PIN(TB10X_PORT5 + 21, "PC_A11"),
PINCTRL_PIN(TB10X_PORT5 + 22, "PC_A12"),
PINCTRL_PIN(TB10X_PORT5 + 23, "PC_A13"),
PINCTRL_PIN(TB10X_PORT5 + 24, "PC_A14"),
PINCTRL_PIN(TB10X_PORT5 + 25, "PC_D0"),
PINCTRL_PIN(TB10X_PORT5 + 26, "PC_D1"),
PINCTRL_PIN(TB10X_PORT5 + 27, "PC_D2"),
PINCTRL_PIN(TB10X_PORT5 + 28, "PC_D3"),
PINCTRL_PIN(TB10X_PORT5 + 29, "PC_D4"),
PINCTRL_PIN(TB10X_PORT5 + 30, "PC_D5"),
PINCTRL_PIN(TB10X_PORT5 + 31, "PC_D6"),
PINCTRL_PIN(TB10X_PORT5 + 32, "PC_D7"),
PINCTRL_PIN(TB10X_PORT5 + 33, "PC_MOSTRT"),
PINCTRL_PIN(TB10X_PORT5 + 34, "PC_MOVAL"),
PINCTRL_PIN(TB10X_PORT5 + 35, "PC_MDO0"),
PINCTRL_PIN(TB10X_PORT5 + 36, "PC_MDO1"),
PINCTRL_PIN(TB10X_PORT5 + 37, "PC_MDO2"),
PINCTRL_PIN(TB10X_PORT5 + 38, "PC_MDO3"),
PINCTRL_PIN(TB10X_PORT5 + 39, "PC_MDO4"),
PINCTRL_PIN(TB10X_PORT5 + 40, "PC_MDO5"),
PINCTRL_PIN(TB10X_PORT5 + 41, "PC_MDO6"),
PINCTRL_PIN(TB10X_PORT5 + 42, "PC_MDO7"),
PINCTRL_PIN(TB10X_PORT5 + 43, "PC_MISTRT"),
PINCTRL_PIN(TB10X_PORT5 + 44, "PC_MIVAL"),
PINCTRL_PIN(TB10X_PORT5 + 45, "PC_MDI0"),
PINCTRL_PIN(TB10X_PORT5 + 46, "PC_MDI1"),
PINCTRL_PIN(TB10X_PORT5 + 47, "PC_MDI2"),
PINCTRL_PIN(TB10X_PORT5 + 48, "PC_MDI3"),
PINCTRL_PIN(TB10X_PORT5 + 49, "PC_MDI4"),
PINCTRL_PIN(TB10X_PORT5 + 50, "PC_MDI5"),
PINCTRL_PIN(TB10X_PORT5 + 51, "PC_MDI6"),
PINCTRL_PIN(TB10X_PORT5 + 52, "PC_MDI7"),
PINCTRL_PIN(TB10X_PORT5 + 53, "PC_MICLK"),
/* Port 6 */
PINCTRL_PIN(TB10X_PORT6 + 0, "T_MOSTRT_S0"),
PINCTRL_PIN(TB10X_PORT6 + 1, "T_MOVAL_S0"),
PINCTRL_PIN(TB10X_PORT6 + 2, "T_MDO_S0"),
PINCTRL_PIN(TB10X_PORT6 + 3, "T_MOSTRT_S1"),
PINCTRL_PIN(TB10X_PORT6 + 4, "T_MOVAL_S1"),
PINCTRL_PIN(TB10X_PORT6 + 5, "T_MDO_S1"),
PINCTRL_PIN(TB10X_PORT6 + 6, "T_MOSTRT_S2"),
PINCTRL_PIN(TB10X_PORT6 + 7, "T_MOVAL_S2"),
PINCTRL_PIN(TB10X_PORT6 + 8, "T_MDO_S2"),
PINCTRL_PIN(TB10X_PORT6 + 9, "T_MOSTRT_S3"),
/* Port 7 */
PINCTRL_PIN(TB10X_PORT7 + 0, "UART0_TXD"),
PINCTRL_PIN(TB10X_PORT7 + 1, "UART0_RXD"),
PINCTRL_PIN(TB10X_PORT7 + 2, "UART0_CTS"),
PINCTRL_PIN(TB10X_PORT7 + 3, "UART0_RTS"),
PINCTRL_PIN(TB10X_PORT7 + 4, "UART1_TXD"),
PINCTRL_PIN(TB10X_PORT7 + 5, "UART1_RXD"),
PINCTRL_PIN(TB10X_PORT7 + 6, "UART1_CTS"),
PINCTRL_PIN(TB10X_PORT7 + 7, "UART1_RTS"),
/* Port 8 */
PINCTRL_PIN(TB10X_PORT8 + 0, "SPI3_CLK"),
PINCTRL_PIN(TB10X_PORT8 + 1, "SPI3_MISO"),
PINCTRL_PIN(TB10X_PORT8 + 2, "SPI3_MOSI"),
PINCTRL_PIN(TB10X_PORT8 + 3, "SPI3_SSN"),
/* Port 9 */
PINCTRL_PIN(TB10X_PORT9 + 0, "SPI1_CLK"),
PINCTRL_PIN(TB10X_PORT9 + 1, "SPI1_MISO"),
PINCTRL_PIN(TB10X_PORT9 + 2, "SPI1_MOSI"),
PINCTRL_PIN(TB10X_PORT9 + 3, "SPI1_SSN0"),
PINCTRL_PIN(TB10X_PORT9 + 4, "SPI1_SSN1"),
/* Unmuxed GPIOs */
PINCTRL_PIN(TB10X_GPIOS + 0, "GPIOB0"),
PINCTRL_PIN(TB10X_GPIOS + 1, "GPIOB1"),
PINCTRL_PIN(TB10X_GPIOS + 2, "GPIOD0"),
PINCTRL_PIN(TB10X_GPIOS + 3, "GPIOD1"),
PINCTRL_PIN(TB10X_GPIOS + 4, "GPIOF0"),
PINCTRL_PIN(TB10X_GPIOS + 5, "GPIOF1"),
PINCTRL_PIN(TB10X_GPIOS + 6, "GPIOH0"),
PINCTRL_PIN(TB10X_GPIOS + 7, "GPIOH1"),
PINCTRL_PIN(TB10X_GPIOS + 8, "GPIOI0"),
PINCTRL_PIN(TB10X_GPIOS + 9, "GPIOI1"),
PINCTRL_PIN(TB10X_GPIOS + 10, "GPIOI2"),
PINCTRL_PIN(TB10X_GPIOS + 11, "GPIOI3"),
PINCTRL_PIN(TB10X_GPIOS + 12, "GPIOI4"),
PINCTRL_PIN(TB10X_GPIOS + 13, "GPIOI5"),
PINCTRL_PIN(TB10X_GPIOS + 14, "GPIOI6"),
PINCTRL_PIN(TB10X_GPIOS + 15, "GPIOI7"),
PINCTRL_PIN(TB10X_GPIOS + 16, "GPIOI8"),
PINCTRL_PIN(TB10X_GPIOS + 17, "GPIOI9"),
PINCTRL_PIN(TB10X_GPIOS + 18, "GPIOI10"),
PINCTRL_PIN(TB10X_GPIOS + 19, "GPIOI11"),
PINCTRL_PIN(TB10X_GPIOS + 20, "GPION0"),
PINCTRL_PIN(TB10X_GPIOS + 21, "GPION1"),
PINCTRL_PIN(TB10X_GPIOS + 22, "GPION2"),
PINCTRL_PIN(TB10X_GPIOS + 23, "GPION3"),
#define MAX_PIN (TB10X_GPIOS + 24)
PINCTRL_PIN(MAX_PIN, "GPION4"),
};
/* Port 1 */
static const unsigned mis0_pins[] = { TB10X_PORT1 + 0, TB10X_PORT1 + 1,
TB10X_PORT1 + 2, TB10X_PORT1 + 3};
static const unsigned gpioa_pins[] = { TB10X_PORT1 + 4, TB10X_PORT1 + 5,
TB10X_PORT1 + 6};
static const unsigned mis1_pins[] = { TB10X_PORT1 + 7, TB10X_PORT1 + 8,
TB10X_PORT1 + 9, TB10X_PORT1 + 10};
static const unsigned mip1_pins[] = { TB10X_PORT1 + 0, TB10X_PORT1 + 1,
TB10X_PORT1 + 2, TB10X_PORT1 + 3,
TB10X_PORT1 + 4, TB10X_PORT1 + 5,
TB10X_PORT1 + 6, TB10X_PORT1 + 7,
TB10X_PORT1 + 8, TB10X_PORT1 + 9,
TB10X_PORT1 + 10};
/* Port 2 */
static const unsigned mis2_pins[] = { TB10X_PORT2 + 0, TB10X_PORT2 + 1,
TB10X_PORT2 + 2, TB10X_PORT2 + 3};
static const unsigned gpioc_pins[] = { TB10X_PORT2 + 4, TB10X_PORT2 + 5,
TB10X_PORT2 + 6};
static const unsigned mis3_pins[] = { TB10X_PORT2 + 7, TB10X_PORT2 + 8,
TB10X_PORT2 + 9, TB10X_PORT2 + 10};
static const unsigned mip3_pins[] = { TB10X_PORT2 + 0, TB10X_PORT2 + 1,
TB10X_PORT2 + 2, TB10X_PORT2 + 3,
TB10X_PORT2 + 4, TB10X_PORT2 + 5,
TB10X_PORT2 + 6, TB10X_PORT2 + 7,
TB10X_PORT2 + 8, TB10X_PORT2 + 9,
TB10X_PORT2 + 10};
/* Port 3 */
static const unsigned mis4_pins[] = { TB10X_PORT3 + 0, TB10X_PORT3 + 1,
TB10X_PORT3 + 2, TB10X_PORT3 + 3};
static const unsigned gpioe_pins[] = { TB10X_PORT3 + 4, TB10X_PORT3 + 5,
TB10X_PORT3 + 6};
static const unsigned mis5_pins[] = { TB10X_PORT3 + 7, TB10X_PORT3 + 8,
TB10X_PORT3 + 9, TB10X_PORT3 + 10};
static const unsigned mip5_pins[] = { TB10X_PORT3 + 0, TB10X_PORT3 + 1,
TB10X_PORT3 + 2, TB10X_PORT3 + 3,
TB10X_PORT3 + 4, TB10X_PORT3 + 5,
TB10X_PORT3 + 6, TB10X_PORT3 + 7,
TB10X_PORT3 + 8, TB10X_PORT3 + 9,
TB10X_PORT3 + 10};
/* Port 4 */
static const unsigned mis6_pins[] = { TB10X_PORT4 + 0, TB10X_PORT4 + 1,
TB10X_PORT4 + 2, TB10X_PORT4 + 3};
static const unsigned gpiog_pins[] = { TB10X_PORT4 + 4, TB10X_PORT4 + 5,
TB10X_PORT4 + 6};
static const unsigned mis7_pins[] = { TB10X_PORT4 + 7, TB10X_PORT4 + 8,
TB10X_PORT4 + 9, TB10X_PORT4 + 10};
static const unsigned mip7_pins[] = { TB10X_PORT4 + 0, TB10X_PORT4 + 1,
TB10X_PORT4 + 2, TB10X_PORT4 + 3,
TB10X_PORT4 + 4, TB10X_PORT4 + 5,
TB10X_PORT4 + 6, TB10X_PORT4 + 7,
TB10X_PORT4 + 8, TB10X_PORT4 + 9,
TB10X_PORT4 + 10};
/* Port 6 */
static const unsigned mop_pins[] = { TB10X_PORT6 + 0, TB10X_PORT6 + 1,
TB10X_PORT6 + 2, TB10X_PORT6 + 3,
TB10X_PORT6 + 4, TB10X_PORT6 + 5,
TB10X_PORT6 + 6, TB10X_PORT6 + 7,
TB10X_PORT6 + 8, TB10X_PORT6 + 9};
static const unsigned mos0_pins[] = { TB10X_PORT6 + 0, TB10X_PORT6 + 1,
TB10X_PORT6 + 2};
static const unsigned mos1_pins[] = { TB10X_PORT6 + 3, TB10X_PORT6 + 4,
TB10X_PORT6 + 5};
static const unsigned mos2_pins[] = { TB10X_PORT6 + 6, TB10X_PORT6 + 7,
TB10X_PORT6 + 8};
static const unsigned mos3_pins[] = { TB10X_PORT6 + 9};
/* Port 7 */
static const unsigned uart0_pins[] = { TB10X_PORT7 + 0, TB10X_PORT7 + 1,
TB10X_PORT7 + 2, TB10X_PORT7 + 3};
static const unsigned uart1_pins[] = { TB10X_PORT7 + 4, TB10X_PORT7 + 5,
TB10X_PORT7 + 6, TB10X_PORT7 + 7};
static const unsigned gpiol_pins[] = { TB10X_PORT7 + 0, TB10X_PORT7 + 1,
TB10X_PORT7 + 2, TB10X_PORT7 + 3};
static const unsigned gpiom_pins[] = { TB10X_PORT7 + 4, TB10X_PORT7 + 5,
TB10X_PORT7 + 6, TB10X_PORT7 + 7};
/* Port 8 */
static const unsigned spi3_pins[] = { TB10X_PORT8 + 0, TB10X_PORT8 + 1,
TB10X_PORT8 + 2, TB10X_PORT8 + 3};
static const unsigned jtag_pins[] = { TB10X_PORT8 + 0, TB10X_PORT8 + 1,
TB10X_PORT8 + 2, TB10X_PORT8 + 3};
/* Port 9 */
static const unsigned spi1_pins[] = { TB10X_PORT9 + 0, TB10X_PORT9 + 1,
TB10X_PORT9 + 2, TB10X_PORT9 + 3,
TB10X_PORT9 + 4};
static const unsigned gpion_pins[] = { TB10X_PORT9 + 0, TB10X_PORT9 + 1,
TB10X_PORT9 + 2, TB10X_PORT9 + 3,
TB10X_PORT9 + 4};
/* Port 5 */
static const unsigned gpioj_pins[] = { TB10X_PORT5 + 0, TB10X_PORT5 + 1,
TB10X_PORT5 + 2, TB10X_PORT5 + 3,
TB10X_PORT5 + 4, TB10X_PORT5 + 5,
TB10X_PORT5 + 6, TB10X_PORT5 + 7,
TB10X_PORT5 + 8, TB10X_PORT5 + 9,
TB10X_PORT5 + 10, TB10X_PORT5 + 11,
TB10X_PORT5 + 12, TB10X_PORT5 + 13,
TB10X_PORT5 + 14, TB10X_PORT5 + 15,
TB10X_PORT5 + 16, TB10X_PORT5 + 17,
TB10X_PORT5 + 18, TB10X_PORT5 + 19,
TB10X_PORT5 + 20, TB10X_PORT5 + 21,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 24, TB10X_PORT5 + 25,
TB10X_PORT5 + 26, TB10X_PORT5 + 27,
TB10X_PORT5 + 28, TB10X_PORT5 + 29,
TB10X_PORT5 + 30, TB10X_PORT5 + 31};
static const unsigned gpiok_pins[] = { TB10X_PORT5 + 32, TB10X_PORT5 + 33,
TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 44, TB10X_PORT5 + 45,
TB10X_PORT5 + 46, TB10X_PORT5 + 47,
TB10X_PORT5 + 48, TB10X_PORT5 + 49,
TB10X_PORT5 + 50, TB10X_PORT5 + 51,
TB10X_PORT5 + 52, TB10X_PORT5 + 53};
static const unsigned ciplus_pins[] = { TB10X_PORT5 + 0, TB10X_PORT5 + 1,
TB10X_PORT5 + 2, TB10X_PORT5 + 3,
TB10X_PORT5 + 4, TB10X_PORT5 + 5,
TB10X_PORT5 + 6, TB10X_PORT5 + 7,
TB10X_PORT5 + 8, TB10X_PORT5 + 9,
TB10X_PORT5 + 10, TB10X_PORT5 + 11,
TB10X_PORT5 + 12, TB10X_PORT5 + 13,
TB10X_PORT5 + 14, TB10X_PORT5 + 15,
TB10X_PORT5 + 16, TB10X_PORT5 + 17,
TB10X_PORT5 + 18, TB10X_PORT5 + 19,
TB10X_PORT5 + 20, TB10X_PORT5 + 21,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 24, TB10X_PORT5 + 25,
TB10X_PORT5 + 26, TB10X_PORT5 + 27,
TB10X_PORT5 + 28, TB10X_PORT5 + 29,
TB10X_PORT5 + 30, TB10X_PORT5 + 31,
TB10X_PORT5 + 32, TB10X_PORT5 + 33,
TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 44, TB10X_PORT5 + 45,
TB10X_PORT5 + 46, TB10X_PORT5 + 47,
TB10X_PORT5 + 48, TB10X_PORT5 + 49,
TB10X_PORT5 + 50, TB10X_PORT5 + 51,
TB10X_PORT5 + 52, TB10X_PORT5 + 53};
static const unsigned mcard_pins[] = { TB10X_PORT5 + 3, TB10X_PORT5 + 10,
TB10X_PORT5 + 11, TB10X_PORT5 + 12,
TB10X_PORT5 + 22, TB10X_PORT5 + 23,
TB10X_PORT5 + 33, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40, TB10X_PORT5 + 41,
TB10X_PORT5 + 42, TB10X_PORT5 + 43,
TB10X_PORT5 + 45, TB10X_PORT5 + 46,
TB10X_PORT5 + 47, TB10X_PORT5 + 48,
TB10X_PORT5 + 49, TB10X_PORT5 + 50,
TB10X_PORT5 + 51, TB10X_PORT5 + 52,
TB10X_PORT5 + 53};
static const unsigned stc0_pins[] = { TB10X_PORT5 + 34, TB10X_PORT5 + 35,
TB10X_PORT5 + 36, TB10X_PORT5 + 37,
TB10X_PORT5 + 38, TB10X_PORT5 + 39,
TB10X_PORT5 + 40};
static const unsigned stc1_pins[] = { TB10X_PORT5 + 25, TB10X_PORT5 + 26,
TB10X_PORT5 + 27, TB10X_PORT5 + 28,
TB10X_PORT5 + 29, TB10X_PORT5 + 30,
TB10X_PORT5 + 44};
/* Unmuxed GPIOs */
static const unsigned gpiob_pins[] = { TB10X_GPIOS + 0, TB10X_GPIOS + 1};
static const unsigned gpiod_pins[] = { TB10X_GPIOS + 2, TB10X_GPIOS + 3};
static const unsigned gpiof_pins[] = { TB10X_GPIOS + 4, TB10X_GPIOS + 5};
static const unsigned gpioh_pins[] = { TB10X_GPIOS + 6, TB10X_GPIOS + 7};
static const unsigned gpioi_pins[] = { TB10X_GPIOS + 8, TB10X_GPIOS + 9,
TB10X_GPIOS + 10, TB10X_GPIOS + 11,
TB10X_GPIOS + 12, TB10X_GPIOS + 13,
TB10X_GPIOS + 14, TB10X_GPIOS + 15,
TB10X_GPIOS + 16, TB10X_GPIOS + 17,
TB10X_GPIOS + 18, TB10X_GPIOS + 19};
struct tb10x_pinfuncgrp {
const char *name;
const unsigned int *pins;
const unsigned int pincnt;
const int port;
const unsigned int mode;
const int isgpio;
};
#define DEFPINFUNCGRP(NAME, PORT, MODE, ISGPIO) { \
.name = __stringify(NAME), \
.pins = NAME##_pins, .pincnt = ARRAY_SIZE(NAME##_pins), \
.port = (PORT), .mode = (MODE), \
.isgpio = (ISGPIO), \
}
static const struct tb10x_pinfuncgrp tb10x_pingroups[] = {
DEFPINFUNCGRP(mis0, 0, 0, 0),
DEFPINFUNCGRP(gpioa, 0, 0, 1),
DEFPINFUNCGRP(mis1, 0, 0, 0),
DEFPINFUNCGRP(mip1, 0, 1, 0),
DEFPINFUNCGRP(mis2, 1, 0, 0),
DEFPINFUNCGRP(gpioc, 1, 0, 1),
DEFPINFUNCGRP(mis3, 1, 0, 0),
DEFPINFUNCGRP(mip3, 1, 1, 0),
DEFPINFUNCGRP(mis4, 2, 0, 0),
DEFPINFUNCGRP(gpioe, 2, 0, 1),
DEFPINFUNCGRP(mis5, 2, 0, 0),
DEFPINFUNCGRP(mip5, 2, 1, 0),
DEFPINFUNCGRP(mis6, 3, 0, 0),
DEFPINFUNCGRP(gpiog, 3, 0, 1),
DEFPINFUNCGRP(mis7, 3, 0, 0),
DEFPINFUNCGRP(mip7, 3, 1, 0),
DEFPINFUNCGRP(gpioj, 4, 0, 1),
DEFPINFUNCGRP(gpiok, 4, 0, 1),
DEFPINFUNCGRP(ciplus, 4, 1, 0),
DEFPINFUNCGRP(mcard, 4, 2, 0),
DEFPINFUNCGRP(stc0, 4, 3, 0),
DEFPINFUNCGRP(stc1, 4, 3, 0),
DEFPINFUNCGRP(mop, 5, 0, 0),
DEFPINFUNCGRP(mos0, 5, 1, 0),
DEFPINFUNCGRP(mos1, 5, 1, 0),
DEFPINFUNCGRP(mos2, 5, 1, 0),
DEFPINFUNCGRP(mos3, 5, 1, 0),
DEFPINFUNCGRP(uart0, 6, 0, 0),
DEFPINFUNCGRP(uart1, 6, 0, 0),
DEFPINFUNCGRP(gpiol, 6, 1, 1),
DEFPINFUNCGRP(gpiom, 6, 1, 1),
DEFPINFUNCGRP(spi3, 7, 0, 0),
DEFPINFUNCGRP(jtag, 7, 1, 0),
DEFPINFUNCGRP(spi1, 8, 0, 0),
DEFPINFUNCGRP(gpion, 8, 1, 1),
DEFPINFUNCGRP(gpiob, -1, 0, 1),
DEFPINFUNCGRP(gpiod, -1, 0, 1),
DEFPINFUNCGRP(gpiof, -1, 0, 1),
DEFPINFUNCGRP(gpioh, -1, 0, 1),
DEFPINFUNCGRP(gpioi, -1, 0, 1),
};
#undef DEFPINFUNCGRP
struct tb10x_of_pinfunc {
const char *name;
const char *group;
};
#define TB10X_PORTS (9)
/**
* struct tb10x_port - state of an I/O port
* @mode: Node this port is currently in.
* @count: Number of enabled functions which require this port to be
* configured in @mode.
*/
struct tb10x_port {
unsigned int mode;
unsigned int count;
};
/**
* struct tb10x_pinctrl - TB10x pin controller internal state
* @pctl: pointer to the pinctrl_dev structure of this pin controller.
* @base: register set base address.
* @pingroups: pointer to an array of the pin groups this driver manages.
* @pinfuncgrpcnt: number of pingroups in @pingroups.
* @pinfuncs: pointer to an array of pin functions this driver manages.
* @pinfuncnt: number of pin functions in @pinfuncs.
* @mutex: mutex for exclusive access to a pin controller's state.
* @ports: current state of each port.
* @gpios: Indicates if a given pin is currently used as GPIO (1) or not (0).
*/
struct tb10x_pinctrl {
struct pinctrl_dev *pctl;
void *base;
const struct tb10x_pinfuncgrp *pingroups;
unsigned int pinfuncgrpcnt;
struct tb10x_of_pinfunc *pinfuncs;
unsigned int pinfuncnt;
struct mutex mutex;
struct tb10x_port ports[TB10X_PORTS];
DECLARE_BITMAP(gpios, MAX_PIN + 1);
};
static inline void tb10x_pinctrl_set_config(struct tb10x_pinctrl *state,
unsigned int port, unsigned int mode)
{
u32 pcfg;
if (state->ports[port].count)
return;
state->ports[port].mode = mode;
pcfg = ioread32(state->base) & ~(PCFG_PORT_MASK(port));
pcfg |= (mode << (PCFG_PORT_BITWIDTH * port)) & PCFG_PORT_MASK(port);
iowrite32(pcfg, state->base);
}
static inline unsigned int tb10x_pinctrl_get_config(
struct tb10x_pinctrl *state,
unsigned int port)
{
return (ioread32(state->base) & PCFG_PORT_MASK(port))
>> (PCFG_PORT_BITWIDTH * port);
}
static int tb10x_get_groups_count(struct pinctrl_dev *pctl)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncgrpcnt;
}
static const char *tb10x_get_group_name(struct pinctrl_dev *pctl, unsigned n)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pingroups[n].name;
}
static int tb10x_get_group_pins(struct pinctrl_dev *pctl, unsigned n,
unsigned const **pins,
unsigned * const num_pins)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
*pins = state->pingroups[n].pins;
*num_pins = state->pingroups[n].pincnt;
return 0;
}
static int tb10x_dt_node_to_map(struct pinctrl_dev *pctl,
struct device_node *np_config,
struct pinctrl_map **map, unsigned *num_maps)
{
const char *string;
unsigned reserved_maps = 0;
int ret = 0;
if (of_property_read_string(np_config, "abilis,function", &string)) {
pr_err("%s: No abilis,function property in device tree.\n",
np_config->full_name);
return -EINVAL;
}
*map = NULL;
*num_maps = 0;
ret = pinctrl_utils_reserve_map(pctl, map, &reserved_maps,
num_maps, 1);
if (ret)
goto out;
ret = pinctrl_utils_add_map_mux(pctl, map, &reserved_maps,
num_maps, string, np_config->name);
out:
return ret;
}
static struct pinctrl_ops tb10x_pinctrl_ops = {
.get_groups_count = tb10x_get_groups_count,
.get_group_name = tb10x_get_group_name,
.get_group_pins = tb10x_get_group_pins,
.dt_node_to_map = tb10x_dt_node_to_map,
.dt_free_map = pinctrl_utils_dt_free_map,
};
static int tb10x_get_functions_count(struct pinctrl_dev *pctl)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncnt;
}
static const char *tb10x_get_function_name(struct pinctrl_dev *pctl,
unsigned n)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
return state->pinfuncs[n].name;
}
static int tb10x_get_function_groups(struct pinctrl_dev *pctl,
unsigned n, const char * const **groups,
unsigned * const num_groups)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
*groups = &state->pinfuncs[n].group;
*num_groups = 1;
return 0;
}
static int tb10x_gpio_request_enable(struct pinctrl_dev *pctl,
struct pinctrl_gpio_range *range,
unsigned pin)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
int muxport = -1;
int muxmode = -1;
int i;
mutex_lock(&state->mutex);
/*
* Figure out to which port the requested GPIO belongs and how to
* configure that port.
* This loop also checks for pin conflicts between GPIOs and other
* functions.
*/
for (i = 0; i < state->pinfuncgrpcnt; i++) {
const struct tb10x_pinfuncgrp *pfg = &state->pingroups[i];
unsigned int mode = pfg->mode;
int j, port = pfg->port;
/*
* Skip pin groups which are always mapped and don't need
* to be configured.
*/
if (port < 0)
continue;
for (j = 0; j < pfg->pincnt; j++) {
if (pin == pfg->pins[j]) {
if (pfg->isgpio) {
/*
* Remember the GPIO-only setting of
* the port this pin belongs to.
*/
muxport = port;
muxmode = mode;
} else if (state->ports[port].count
&& (state->ports[port].mode == mode)) {
/*
* Error: The requested pin is already
* used for something else.
*/
mutex_unlock(&state->mutex);
return -EBUSY;
}
break;
}
}
}
/*
* If we haven't returned an error at this point, the GPIO pin is not
* used by another function and the GPIO request can be granted:
* Register pin as being used as GPIO so we don't allocate it to
* another function later.
*/
set_bit(pin, state->gpios);
/*
* Potential conflicts between GPIOs and pin functions were caught
* earlier in this function and tb10x_pinctrl_set_config will do the
* Right Thing, either configure the port in GPIO only mode or leave
* another mode compatible with this GPIO request untouched.
*/
if (muxport >= 0)
tb10x_pinctrl_set_config(state, muxport, muxmode);
mutex_unlock(&state->mutex);
return 0;
}
static void tb10x_gpio_disable_free(struct pinctrl_dev *pctl,
struct pinctrl_gpio_range *range,
unsigned pin)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
mutex_lock(&state->mutex);
clear_bit(pin, state->gpios);
mutex_unlock(&state->mutex);
}
static int tb10x_pctl_set_mux(struct pinctrl_dev *pctl,
unsigned func_selector, unsigned group_selector)
{
struct tb10x_pinctrl *state = pinctrl_dev_get_drvdata(pctl);
const struct tb10x_pinfuncgrp *grp = &state->pingroups[group_selector];
int i;
if (grp->port < 0)
return 0;
mutex_lock(&state->mutex);
/*
* Check if the requested function is compatible with previously
* requested functions.
*/
if (state->ports[grp->port].count
&& (state->ports[grp->port].mode != grp->mode)) {
mutex_unlock(&state->mutex);
return -EBUSY;
}
/*
* Check if the requested function is compatible with previously
* requested GPIOs.
*/
for (i = 0; i < grp->pincnt; i++)
if (test_bit(grp->pins[i], state->gpios)) {
mutex_unlock(&state->mutex);
return -EBUSY;
}
tb10x_pinctrl_set_config(state, grp->port, grp->mode);
state->ports[grp->port].count++;
mutex_unlock(&state->mutex);
return 0;
}
static struct pinmux_ops tb10x_pinmux_ops = {
.get_functions_count = tb10x_get_functions_count,
.get_function_name = tb10x_get_function_name,
.get_function_groups = tb10x_get_function_groups,
.gpio_request_enable = tb10x_gpio_request_enable,
.gpio_disable_free = tb10x_gpio_disable_free,
.set_mux = tb10x_pctl_set_mux,
};
static struct pinctrl_desc tb10x_pindesc = {
.name = "TB10x",
.pins = tb10x_pins,
.npins = ARRAY_SIZE(tb10x_pins),
.owner = THIS_MODULE,
.pctlops = &tb10x_pinctrl_ops,
.pmxops = &tb10x_pinmux_ops,
};
static int tb10x_pinctrl_probe(struct platform_device *pdev)
{
int ret = -EINVAL;
struct resource *mem;
struct device *dev = &pdev->dev;
struct device_node *of_node = dev->of_node;
struct device_node *child;
struct tb10x_pinctrl *state;
int i;
if (!of_node) {
dev_err(dev, "No device tree node found.\n");
return -EINVAL;
}
state = devm_kzalloc(dev, sizeof(struct tb10x_pinctrl) +
of_get_child_count(of_node)
* sizeof(struct tb10x_of_pinfunc),
GFP_KERNEL);
if (!state)
return -ENOMEM;
platform_set_drvdata(pdev, state);
state->pinfuncs = (struct tb10x_of_pinfunc *)(state + 1);
mutex_init(&state->mutex);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
state->base = devm_ioremap_resource(dev, mem);
if (IS_ERR(state->base)) {
ret = PTR_ERR(state->base);
goto fail;
}
state->pingroups = tb10x_pingroups;
state->pinfuncgrpcnt = ARRAY_SIZE(tb10x_pingroups);
for (i = 0; i < TB10X_PORTS; i++)
state->ports[i].mode = tb10x_pinctrl_get_config(state, i);
for_each_child_of_node(of_node, child) {
const char *name;
if (!of_property_read_string(child, "abilis,function",
&name)) {
state->pinfuncs[state->pinfuncnt].name = child->name;
state->pinfuncs[state->pinfuncnt].group = name;
state->pinfuncnt++;
}
}
state->pctl = pinctrl_register(&tb10x_pindesc, dev, state);
if (IS_ERR(state->pctl)) {
dev_err(dev, "could not register TB10x pin driver\n");
ret = PTR_ERR(state->pctl);
goto fail;
}
return 0;
fail:
mutex_destroy(&state->mutex);
return ret;
}
static int tb10x_pinctrl_remove(struct platform_device *pdev)
{
struct tb10x_pinctrl *state = platform_get_drvdata(pdev);
pinctrl_unregister(state->pctl);
mutex_destroy(&state->mutex);
return 0;
}
static const struct of_device_id tb10x_pinctrl_dt_ids[] = {
{ .compatible = "abilis,tb10x-iomux" },
{ }
};
MODULE_DEVICE_TABLE(of, tb10x_pinctrl_dt_ids);
static struct platform_driver tb10x_pinctrl_pdrv = {
.probe = tb10x_pinctrl_probe,
.remove = tb10x_pinctrl_remove,
.driver = {
.name = "tb10x_pinctrl",
.of_match_table = of_match_ptr(tb10x_pinctrl_dt_ids),
}
};
module_platform_driver(tb10x_pinctrl_pdrv);
MODULE_AUTHOR("Christian Ruppert <christian.ruppert@abilis.com>");
MODULE_LICENSE("GPL");
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