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linux/drivers/pinctrl/bcm/pinctrl-ns2-mux.c
Mika Westerberg 58957d2edf pinctrl: Widen the generic pinconf argument from 16 to 24 bits 
The current pinconf packed format allows only 16-bit argument limiting
the maximum value 65535. For most types this is enough. However,
debounce time can be in range of hundreths of milliseconds in case of
mechanical switches so we cannot represent the worst case using the
current format.

In order to support larger values change the packed format so that the
lower 8 bits are used as type which leaves 24 bits for the argument.
This allows representing values up to 16777215 and debounce times up to
16 seconds.

We also convert the existing users to use 32-bit integer when extracting
argument from the packed configuration value.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-01-26 15:22:32 +01:00

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/* Copyright (C) 2016 Broadcom Corporation
*
* 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 version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* This file contains the Northstar2 IOMUX driver that supports group
* based PINMUX configuration. The PWM is functional only when the
* corresponding mfio pin group is selected as gpio.
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include "../core.h"
#include "../pinctrl-utils.h"
#define NS2_NUM_IOMUX 19
#define NS2_NUM_PWM_MUX 4
#define NS2_PIN_MUX_BASE0 0x00
#define NS2_PIN_MUX_BASE1 0x01
#define NS2_PIN_CONF_BASE 0x02
#define NS2_MUX_PAD_FUNC1_OFFSET 0x04
#define NS2_PIN_SRC_MASK 0x01
#define NS2_PIN_PULL_MASK 0x03
#define NS2_PIN_DRIVE_STRENGTH_MASK 0x07
#define NS2_PIN_PULL_UP 0x01
#define NS2_PIN_PULL_DOWN 0x02
#define NS2_PIN_INPUT_EN_MASK 0x01
/*
* Northstar2 IOMUX register description
*
* @base: base address number
* @offset: register offset for mux configuration of a group
* @shift: bit shift for mux configuration of a group
* @mask: mask bits
* @alt: alternate function to set to
*/
struct ns2_mux {
unsigned int base;
unsigned int offset;
unsigned int shift;
unsigned int mask;
unsigned int alt;
};
/*
* Keep track of Northstar2 IOMUX configuration and prevent double
* configuration
*
* @ns2_mux: Northstar2 IOMUX register description
* @is_configured: flag to indicate whether a mux setting has already
* been configured
*/
struct ns2_mux_log {
struct ns2_mux mux;
bool is_configured;
};
/*
* Group based IOMUX configuration
*
* @name: name of the group
* @pins: array of pins used by this group
* @num_pins: total number of pins used by this group
* @mux: Northstar2 group based IOMUX configuration
*/
struct ns2_pin_group {
const char *name;
const unsigned int *pins;
const unsigned int num_pins;
const struct ns2_mux mux;
};
/*
* Northstar2 mux function and supported pin groups
*
* @name: name of the function
* @groups: array of groups that can be supported by this function
* @num_groups: total number of groups that can be supported by function
*/
struct ns2_pin_function {
const char *name;
const char * const *groups;
const unsigned int num_groups;
};
/*
* Northstar2 IOMUX pinctrl core
*
* @pctl: pointer to pinctrl_dev
* @dev: pointer to device
* @base0: first IOMUX register base
* @base1: second IOMUX register base
* @pinconf_base: configuration register base
* @groups: pointer to array of groups
* @num_groups: total number of groups
* @functions: pointer to array of functions
* @num_functions: total number of functions
* @mux_log: pointer to the array of mux logs
* @lock: lock to protect register access
*/
struct ns2_pinctrl {
struct pinctrl_dev *pctl;
struct device *dev;
void __iomem *base0;
void __iomem *base1;
void __iomem *pinconf_base;
const struct ns2_pin_group *groups;
unsigned int num_groups;
const struct ns2_pin_function *functions;
unsigned int num_functions;
struct ns2_mux_log *mux_log;
spinlock_t lock;
};
/*
* Pin configuration info
*
* @base: base address number
* @offset: register offset from base
* @src_shift: slew rate control bit shift in the register
* @input_en: input enable control bit shift
* @pull_shift: pull-up/pull-down control bit shift in the register
* @drive_shift: drive strength control bit shift in the register
*/
struct ns2_pinconf {
unsigned int base;
unsigned int offset;
unsigned int src_shift;
unsigned int input_en;
unsigned int pull_shift;
unsigned int drive_shift;
};
/*
* Description of a pin in Northstar2
*
* @pin: pin number
* @name: pin name
* @pin_conf: pin configuration structure
*/
struct ns2_pin {
unsigned int pin;
char *name;
struct ns2_pinconf pin_conf;
};
#define NS2_PIN_DESC(p, n, b, o, s, i, pu, d) \
{ \
.pin = p, \
.name = n, \
.pin_conf = { \
.base = b, \
.offset = o, \
.src_shift = s, \
.input_en = i, \
.pull_shift = pu, \
.drive_shift = d, \
} \
}
/*
* List of pins in Northstar2
*/
static struct ns2_pin ns2_pins[] = {
NS2_PIN_DESC(0, "mfio_0", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(1, "mfio_1", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(2, "mfio_2", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(3, "mfio_3", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(4, "mfio_4", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(5, "mfio_5", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(6, "mfio_6", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(7, "mfio_7", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(8, "mfio_8", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(9, "mfio_9", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(10, "mfio_10", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(11, "mfio_11", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(12, "mfio_12", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(13, "mfio_13", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(14, "mfio_14", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(15, "mfio_15", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(16, "mfio_16", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(17, "mfio_17", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(18, "mfio_18", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(19, "mfio_19", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(20, "mfio_20", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(21, "mfio_21", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(22, "mfio_22", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(23, "mfio_23", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(24, "mfio_24", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(25, "mfio_25", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(26, "mfio_26", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(27, "mfio_27", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(28, "mfio_28", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(29, "mfio_29", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(30, "mfio_30", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(31, "mfio_31", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(32, "mfio_32", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(33, "mfio_33", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(34, "mfio_34", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(35, "mfio_35", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(36, "mfio_36", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(37, "mfio_37", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(38, "mfio_38", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(39, "mfio_39", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(40, "mfio_40", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(41, "mfio_41", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(42, "mfio_42", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(43, "mfio_43", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(44, "mfio_44", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(45, "mfio_45", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(46, "mfio_46", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(47, "mfio_47", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(48, "mfio_48", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(49, "mfio_49", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(50, "mfio_50", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(51, "mfio_51", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(52, "mfio_52", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(53, "mfio_53", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(54, "mfio_54", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(55, "mfio_55", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(56, "mfio_56", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(57, "mfio_57", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(58, "mfio_58", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(59, "mfio_59", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(60, "mfio_60", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(61, "mfio_61", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(62, "mfio_62", -1, 0, 0, 0, 0, 0),
NS2_PIN_DESC(63, "qspi_wp", 2, 0x0, 31, 30, 27, 24),
NS2_PIN_DESC(64, "qspi_hold", 2, 0x0, 23, 22, 19, 16),
NS2_PIN_DESC(65, "qspi_cs", 2, 0x0, 15, 14, 11, 8),
NS2_PIN_DESC(66, "qspi_sck", 2, 0x0, 7, 6, 3, 0),
NS2_PIN_DESC(67, "uart3_sin", 2, 0x04, 31, 30, 27, 24),
NS2_PIN_DESC(68, "uart3_sout", 2, 0x04, 23, 22, 19, 16),
NS2_PIN_DESC(69, "qspi_mosi", 2, 0x04, 15, 14, 11, 8),
NS2_PIN_DESC(70, "qspi_miso", 2, 0x04, 7, 6, 3, 0),
NS2_PIN_DESC(71, "spi0_fss", 2, 0x08, 31, 30, 27, 24),
NS2_PIN_DESC(72, "spi0_rxd", 2, 0x08, 23, 22, 19, 16),
NS2_PIN_DESC(73, "spi0_txd", 2, 0x08, 15, 14, 11, 8),
NS2_PIN_DESC(74, "spi0_sck", 2, 0x08, 7, 6, 3, 0),
NS2_PIN_DESC(75, "spi1_fss", 2, 0x0c, 31, 30, 27, 24),
NS2_PIN_DESC(76, "spi1_rxd", 2, 0x0c, 23, 22, 19, 16),
NS2_PIN_DESC(77, "spi1_txd", 2, 0x0c, 15, 14, 11, 8),
NS2_PIN_DESC(78, "spi1_sck", 2, 0x0c, 7, 6, 3, 0),
NS2_PIN_DESC(79, "sdio0_data7", 2, 0x10, 31, 30, 27, 24),
NS2_PIN_DESC(80, "sdio0_emmc_rst", 2, 0x10, 23, 22, 19, 16),
NS2_PIN_DESC(81, "sdio0_led_on", 2, 0x10, 15, 14, 11, 8),
NS2_PIN_DESC(82, "sdio0_wp", 2, 0x10, 7, 6, 3, 0),
NS2_PIN_DESC(83, "sdio0_data3", 2, 0x14, 31, 30, 27, 24),
NS2_PIN_DESC(84, "sdio0_data4", 2, 0x14, 23, 22, 19, 16),
NS2_PIN_DESC(85, "sdio0_data5", 2, 0x14, 15, 14, 11, 8),
NS2_PIN_DESC(86, "sdio0_data6", 2, 0x14, 7, 6, 3, 0),
NS2_PIN_DESC(87, "sdio0_cmd", 2, 0x18, 31, 30, 27, 24),
NS2_PIN_DESC(88, "sdio0_data0", 2, 0x18, 23, 22, 19, 16),
NS2_PIN_DESC(89, "sdio0_data1", 2, 0x18, 15, 14, 11, 8),
NS2_PIN_DESC(90, "sdio0_data2", 2, 0x18, 7, 6, 3, 0),
NS2_PIN_DESC(91, "sdio1_led_on", 2, 0x1c, 31, 30, 27, 24),
NS2_PIN_DESC(92, "sdio1_wp", 2, 0x1c, 23, 22, 19, 16),
NS2_PIN_DESC(93, "sdio0_cd_l", 2, 0x1c, 15, 14, 11, 8),
NS2_PIN_DESC(94, "sdio0_clk", 2, 0x1c, 7, 6, 3, 0),
NS2_PIN_DESC(95, "sdio1_data5", 2, 0x20, 31, 30, 27, 24),
NS2_PIN_DESC(96, "sdio1_data6", 2, 0x20, 23, 22, 19, 16),
NS2_PIN_DESC(97, "sdio1_data7", 2, 0x20, 15, 14, 11, 8),
NS2_PIN_DESC(98, "sdio1_emmc_rst", 2, 0x20, 7, 6, 3, 0),
NS2_PIN_DESC(99, "sdio1_data1", 2, 0x24, 31, 30, 27, 24),
NS2_PIN_DESC(100, "sdio1_data2", 2, 0x24, 23, 22, 19, 16),
NS2_PIN_DESC(101, "sdio1_data3", 2, 0x24, 15, 14, 11, 8),
NS2_PIN_DESC(102, "sdio1_data4", 2, 0x24, 7, 6, 3, 0),
NS2_PIN_DESC(103, "sdio1_cd_l", 2, 0x28, 31, 30, 27, 24),
NS2_PIN_DESC(104, "sdio1_clk", 2, 0x28, 23, 22, 19, 16),
NS2_PIN_DESC(105, "sdio1_cmd", 2, 0x28, 15, 14, 11, 8),
NS2_PIN_DESC(106, "sdio1_data0", 2, 0x28, 7, 6, 3, 0),
NS2_PIN_DESC(107, "ext_mdio_0", 2, 0x2c, 15, 14, 11, 8),
NS2_PIN_DESC(108, "ext_mdc_0", 2, 0x2c, 7, 6, 3, 0),
NS2_PIN_DESC(109, "usb3_p1_vbus_ppc", 2, 0x34, 31, 30, 27, 24),
NS2_PIN_DESC(110, "usb3_p1_overcurrent", 2, 0x34, 23, 22, 19, 16),
NS2_PIN_DESC(111, "usb3_p0_vbus_ppc", 2, 0x34, 15, 14, 11, 8),
NS2_PIN_DESC(112, "usb3_p0_overcurrent", 2, 0x34, 7, 6, 3, 0),
NS2_PIN_DESC(113, "usb2_presence_indication", 2, 0x38, 31, 30, 27, 24),
NS2_PIN_DESC(114, "usb2_vbus_present", 2, 0x38, 23, 22, 19, 16),
NS2_PIN_DESC(115, "usb2_vbus_ppc", 2, 0x38, 15, 14, 11, 8),
NS2_PIN_DESC(116, "usb2_overcurrent", 2, 0x38, 7, 6, 3, 0),
NS2_PIN_DESC(117, "sata_led1", 2, 0x3c, 15, 14, 11, 8),
NS2_PIN_DESC(118, "sata_led0", 2, 0x3c, 7, 6, 3, 0),
};
/*
* List of groups of pins
*/
static const unsigned int nand_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23};
static const unsigned int nor_data_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25};
static const unsigned int gpio_0_1_pins[] = {24, 25};
static const unsigned int pwm_0_pins[] = {24};
static const unsigned int pwm_1_pins[] = {25};
static const unsigned int uart1_ext_clk_pins[] = {26};
static const unsigned int nor_adv_pins[] = {26};
static const unsigned int gpio_2_5_pins[] = {27, 28, 29, 30};
static const unsigned int pcie_ab1_clk_wak_pins[] = {27, 28, 29, 30};
static const unsigned int nor_addr_0_3_pins[] = {27, 28, 29, 30};
static const unsigned int pwm_2_pins[] = {27};
static const unsigned int pwm_3_pins[] = {28};
static const unsigned int gpio_6_7_pins[] = {31, 32};
static const unsigned int pcie_a3_clk_wak_pins[] = {31, 32};
static const unsigned int nor_addr_4_5_pins[] = {31, 32};
static const unsigned int gpio_8_9_pins[] = {33, 34};
static const unsigned int pcie_b3_clk_wak_pins[] = {33, 34};
static const unsigned int nor_addr_6_7_pins[] = {33, 34};
static const unsigned int gpio_10_11_pins[] = {35, 36};
static const unsigned int pcie_b2_clk_wak_pins[] = {35, 36};
static const unsigned int nor_addr_8_9_pins[] = {35, 36};
static const unsigned int gpio_12_13_pins[] = {37, 38};
static const unsigned int pcie_a2_clk_wak_pins[] = {37, 38};
static const unsigned int nor_addr_10_11_pins[] = {37, 38};
static const unsigned int gpio_14_17_pins[] = {39, 40, 41, 42};
static const unsigned int uart0_modem_pins[] = {39, 40, 41, 42};
static const unsigned int nor_addr_12_15_pins[] = {39, 40, 41, 42};
static const unsigned int gpio_18_19_pins[] = {43, 44};
static const unsigned int uart0_rts_cts_pins[] = {43, 44};
static const unsigned int gpio_20_21_pins[] = {45, 46};
static const unsigned int uart0_in_out_pins[] = {45, 46};
static const unsigned int gpio_22_23_pins[] = {47, 48};
static const unsigned int uart1_dcd_dsr_pins[] = {47, 48};
static const unsigned int gpio_24_25_pins[] = {49, 50};
static const unsigned int uart1_ri_dtr_pins[] = {49, 50};
static const unsigned int gpio_26_27_pins[] = {51, 52};
static const unsigned int uart1_rts_cts_pins[] = {51, 52};
static const unsigned int gpio_28_29_pins[] = {53, 54};
static const unsigned int uart1_in_out_pins[] = {53, 54};
static const unsigned int gpio_30_31_pins[] = {55, 56};
static const unsigned int uart2_rts_cts_pins[] = {55, 56};
#define NS2_PIN_GROUP(group_name, ba, off, sh, ma, al) \
{ \
.name = __stringify(group_name) "_grp", \
.pins = group_name ## _pins, \
.num_pins = ARRAY_SIZE(group_name ## _pins), \
.mux = { \
.base = ba, \
.offset = off, \
.shift = sh, \
.mask = ma, \
.alt = al, \
} \
}
/*
* List of Northstar2 pin groups
*/
static const struct ns2_pin_group ns2_pin_groups[] = {
NS2_PIN_GROUP(nand, 0, 0, 31, 1, 0),
NS2_PIN_GROUP(nor_data, 0, 0, 31, 1, 1),
NS2_PIN_GROUP(gpio_0_1, 0, 0, 31, 1, 0),
NS2_PIN_GROUP(uart1_ext_clk, 0, 4, 30, 3, 1),
NS2_PIN_GROUP(nor_adv, 0, 4, 30, 3, 2),
NS2_PIN_GROUP(gpio_2_5, 0, 4, 28, 3, 0),
NS2_PIN_GROUP(pcie_ab1_clk_wak, 0, 4, 28, 3, 1),
NS2_PIN_GROUP(nor_addr_0_3, 0, 4, 28, 3, 2),
NS2_PIN_GROUP(gpio_6_7, 0, 4, 26, 3, 0),
NS2_PIN_GROUP(pcie_a3_clk_wak, 0, 4, 26, 3, 1),
NS2_PIN_GROUP(nor_addr_4_5, 0, 4, 26, 3, 2),
NS2_PIN_GROUP(gpio_8_9, 0, 4, 24, 3, 0),
NS2_PIN_GROUP(pcie_b3_clk_wak, 0, 4, 24, 3, 1),
NS2_PIN_GROUP(nor_addr_6_7, 0, 4, 24, 3, 2),
NS2_PIN_GROUP(gpio_10_11, 0, 4, 22, 3, 0),
NS2_PIN_GROUP(pcie_b2_clk_wak, 0, 4, 22, 3, 1),
NS2_PIN_GROUP(nor_addr_8_9, 0, 4, 22, 3, 2),
NS2_PIN_GROUP(gpio_12_13, 0, 4, 20, 3, 0),
NS2_PIN_GROUP(pcie_a2_clk_wak, 0, 4, 20, 3, 1),
NS2_PIN_GROUP(nor_addr_10_11, 0, 4, 20, 3, 2),
NS2_PIN_GROUP(gpio_14_17, 0, 4, 18, 3, 0),
NS2_PIN_GROUP(uart0_modem, 0, 4, 18, 3, 1),
NS2_PIN_GROUP(nor_addr_12_15, 0, 4, 18, 3, 2),
NS2_PIN_GROUP(gpio_18_19, 0, 4, 16, 3, 0),
NS2_PIN_GROUP(uart0_rts_cts, 0, 4, 16, 3, 1),
NS2_PIN_GROUP(gpio_20_21, 0, 4, 14, 3, 0),
NS2_PIN_GROUP(uart0_in_out, 0, 4, 14, 3, 1),
NS2_PIN_GROUP(gpio_22_23, 0, 4, 12, 3, 0),
NS2_PIN_GROUP(uart1_dcd_dsr, 0, 4, 12, 3, 1),
NS2_PIN_GROUP(gpio_24_25, 0, 4, 10, 3, 0),
NS2_PIN_GROUP(uart1_ri_dtr, 0, 4, 10, 3, 1),
NS2_PIN_GROUP(gpio_26_27, 0, 4, 8, 3, 0),
NS2_PIN_GROUP(uart1_rts_cts, 0, 4, 8, 3, 1),
NS2_PIN_GROUP(gpio_28_29, 0, 4, 6, 3, 0),
NS2_PIN_GROUP(uart1_in_out, 0, 4, 6, 3, 1),
NS2_PIN_GROUP(gpio_30_31, 0, 4, 4, 3, 0),
NS2_PIN_GROUP(uart2_rts_cts, 0, 4, 4, 3, 1),
NS2_PIN_GROUP(pwm_0, 1, 0, 0, 1, 1),
NS2_PIN_GROUP(pwm_1, 1, 0, 1, 1, 1),
NS2_PIN_GROUP(pwm_2, 1, 0, 2, 1, 1),
NS2_PIN_GROUP(pwm_3, 1, 0, 3, 1, 1),
};
/*
* List of groups supported by functions
*/
static const char * const nand_grps[] = {"nand_grp"};
static const char * const nor_grps[] = {"nor_data_grp", "nor_adv_grp",
"nor_addr_0_3_grp", "nor_addr_4_5_grp", "nor_addr_6_7_grp",
"nor_addr_8_9_grp", "nor_addr_10_11_grp", "nor_addr_12_15_grp"};
static const char * const gpio_grps[] = {"gpio_0_1_grp", "gpio_2_5_grp",
"gpio_6_7_grp", "gpio_8_9_grp", "gpio_10_11_grp", "gpio_12_13_grp",
"gpio_14_17_grp", "gpio_18_19_grp", "gpio_20_21_grp", "gpio_22_23_grp",
"gpio_24_25_grp", "gpio_26_27_grp", "gpio_28_29_grp",
"gpio_30_31_grp"};
static const char * const pcie_grps[] = {"pcie_ab1_clk_wak_grp",
"pcie_a3_clk_wak_grp", "pcie_b3_clk_wak_grp", "pcie_b2_clk_wak_grp",
"pcie_a2_clk_wak_grp"};
static const char * const uart0_grps[] = {"uart0_modem_grp",
"uart0_rts_cts_grp", "uart0_in_out_grp"};
static const char * const uart1_grps[] = {"uart1_ext_clk_grp",
"uart1_dcd_dsr_grp", "uart1_ri_dtr_grp", "uart1_rts_cts_grp",
"uart1_in_out_grp"};
static const char * const uart2_grps[] = {"uart2_rts_cts_grp"};
static const char * const pwm_grps[] = {"pwm_0_grp", "pwm_1_grp",
"pwm_2_grp", "pwm_3_grp"};
#define NS2_PIN_FUNCTION(func) \
{ \
.name = #func, \
.groups = func ## _grps, \
.num_groups = ARRAY_SIZE(func ## _grps), \
}
/*
* List of supported functions
*/
static const struct ns2_pin_function ns2_pin_functions[] = {
NS2_PIN_FUNCTION(nand),
NS2_PIN_FUNCTION(nor),
NS2_PIN_FUNCTION(gpio),
NS2_PIN_FUNCTION(pcie),
NS2_PIN_FUNCTION(uart0),
NS2_PIN_FUNCTION(uart1),
NS2_PIN_FUNCTION(uart2),
NS2_PIN_FUNCTION(pwm),
};
static int ns2_get_groups_count(struct pinctrl_dev *pctrl_dev)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return pinctrl->num_groups;
}
static const char *ns2_get_group_name(struct pinctrl_dev *pctrl_dev,
unsigned int selector)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return pinctrl->groups[selector].name;
}
static int ns2_get_group_pins(struct pinctrl_dev *pctrl_dev,
unsigned int selector, const unsigned int **pins,
unsigned int *num_pins)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
*pins = pinctrl->groups[selector].pins;
*num_pins = pinctrl->groups[selector].num_pins;
return 0;
}
static void ns2_pin_dbg_show(struct pinctrl_dev *pctrl_dev,
struct seq_file *s, unsigned int offset)
{
seq_printf(s, " %s", dev_name(pctrl_dev->dev));
}
static const struct pinctrl_ops ns2_pinctrl_ops = {
.get_groups_count = ns2_get_groups_count,
.get_group_name = ns2_get_group_name,
.get_group_pins = ns2_get_group_pins,
.pin_dbg_show = ns2_pin_dbg_show,
.dt_node_to_map = pinconf_generic_dt_node_to_map_pin,
.dt_free_map = pinctrl_utils_free_map,
};
static int ns2_get_functions_count(struct pinctrl_dev *pctrl_dev)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return pinctrl->num_functions;
}
static const char *ns2_get_function_name(struct pinctrl_dev *pctrl_dev,
unsigned int selector)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
return pinctrl->functions[selector].name;
}
static int ns2_get_function_groups(struct pinctrl_dev *pctrl_dev,
unsigned int selector,
const char * const **groups,
unsigned int * const num_groups)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
*groups = pinctrl->functions[selector].groups;
*num_groups = pinctrl->functions[selector].num_groups;
return 0;
}
static int ns2_pinmux_set(struct ns2_pinctrl *pinctrl,
const struct ns2_pin_function *func,
const struct ns2_pin_group *grp,
struct ns2_mux_log *mux_log)
{
const struct ns2_mux *mux = &grp->mux;
int i;
u32 val, mask;
unsigned long flags;
void __iomem *base_address;
for (i = 0; i < NS2_NUM_IOMUX; i++) {
if ((mux->shift != mux_log[i].mux.shift) ||
(mux->base != mux_log[i].mux.base) ||
(mux->offset != mux_log[i].mux.offset))
continue;
/* if this is a new configuration, just do it! */
if (!mux_log[i].is_configured)
break;
/*
* IOMUX has been configured previously and one is trying to
* configure it to a different function
*/
if (mux_log[i].mux.alt != mux->alt) {
dev_err(pinctrl->dev,
"double configuration error detected!\n");
dev_err(pinctrl->dev, "func:%s grp:%s\n",
func->name, grp->name);
return -EINVAL;
}
return 0;
}
if (i == NS2_NUM_IOMUX)
return -EINVAL;
mask = mux->mask;
mux_log[i].mux.alt = mux->alt;
mux_log[i].is_configured = true;
switch (mux->base) {
case NS2_PIN_MUX_BASE0:
base_address = pinctrl->base0;
break;
case NS2_PIN_MUX_BASE1:
base_address = pinctrl->base1;
break;
default:
return -EINVAL;
}
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(base_address + grp->mux.offset);
val &= ~(mask << grp->mux.shift);
val |= grp->mux.alt << grp->mux.shift;
writel(val, (base_address + grp->mux.offset));
spin_unlock_irqrestore(&pinctrl->lock, flags);
return 0;
}
static int ns2_pinmux_enable(struct pinctrl_dev *pctrl_dev,
unsigned int func_select, unsigned int grp_select)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);
const struct ns2_pin_function *func;
const struct ns2_pin_group *grp;
if (grp_select > pinctrl->num_groups ||
func_select > pinctrl->num_functions)
return -EINVAL;
func = &pinctrl->functions[func_select];
grp = &pinctrl->groups[grp_select];
dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n",
func_select, func->name, grp_select, grp->name);
dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n",
grp->mux.offset, grp->mux.shift, grp->mux.alt);
return ns2_pinmux_set(pinctrl, func, grp, pinctrl->mux_log);
}
static int ns2_pin_set_enable(struct pinctrl_dev *pctrldev, unsigned int pin,
u16 enable)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
u32 val;
void __iomem *base_address;
base_address = pinctrl->pinconf_base;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(base_address + pin_data->pin_conf.offset);
val &= ~(NS2_PIN_SRC_MASK << pin_data->pin_conf.input_en);
if (!enable)
val |= NS2_PIN_INPUT_EN_MASK << pin_data->pin_conf.input_en;
writel(val, (base_address + pin_data->pin_conf.offset));
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u set enable:%d\n", pin, enable);
return 0;
}
static int ns2_pin_get_enable(struct pinctrl_dev *pctrldev, unsigned int pin)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
int enable;
spin_lock_irqsave(&pinctrl->lock, flags);
enable = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset);
enable = (enable >> pin_data->pin_conf.input_en) &
NS2_PIN_INPUT_EN_MASK;
spin_unlock_irqrestore(&pinctrl->lock, flags);
if (!enable)
enable = NS2_PIN_INPUT_EN_MASK;
else
enable = 0;
dev_dbg(pctrldev->dev, "pin:%u get disable:%d\n", pin, enable);
return enable;
}
static int ns2_pin_set_slew(struct pinctrl_dev *pctrldev, unsigned int pin,
u32 slew)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
u32 val;
void __iomem *base_address;
base_address = pinctrl->pinconf_base;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(base_address + pin_data->pin_conf.offset);
val &= ~(NS2_PIN_SRC_MASK << pin_data->pin_conf.src_shift);
if (slew)
val |= NS2_PIN_SRC_MASK << pin_data->pin_conf.src_shift;
writel(val, (base_address + pin_data->pin_conf.offset));
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u set slew:%d\n", pin, slew);
return 0;
}
static int ns2_pin_get_slew(struct pinctrl_dev *pctrldev, unsigned int pin,
u16 *slew)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
u32 val;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset);
*slew = (val >> pin_data->pin_conf.src_shift) & NS2_PIN_SRC_MASK;
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u get slew:%d\n", pin, *slew);
return 0;
}
static int ns2_pin_set_pull(struct pinctrl_dev *pctrldev, unsigned int pin,
bool pull_up, bool pull_down)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
u32 val;
void __iomem *base_address;
base_address = pinctrl->pinconf_base;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(base_address + pin_data->pin_conf.offset);
val &= ~(NS2_PIN_PULL_MASK << pin_data->pin_conf.pull_shift);
if (pull_up == true)
val |= NS2_PIN_PULL_UP << pin_data->pin_conf.pull_shift;
if (pull_down == true)
val |= NS2_PIN_PULL_DOWN << pin_data->pin_conf.pull_shift;
writel(val, (base_address + pin_data->pin_conf.offset));
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u set pullup:%d pulldown: %d\n",
pin, pull_up, pull_down);
return 0;
}
static void ns2_pin_get_pull(struct pinctrl_dev *pctrldev,
unsigned int pin, bool *pull_up,
bool *pull_down)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
unsigned long flags;
u32 val;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset);
val = (val >> pin_data->pin_conf.pull_shift) & NS2_PIN_PULL_MASK;
*pull_up = false;
*pull_down = false;
if (val == NS2_PIN_PULL_UP)
*pull_up = true;
if (val == NS2_PIN_PULL_DOWN)
*pull_down = true;
spin_unlock_irqrestore(&pinctrl->lock, flags);
}
static int ns2_pin_set_strength(struct pinctrl_dev *pctrldev, unsigned int pin,
u32 strength)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
u32 val;
unsigned long flags;
void __iomem *base_address;
/* make sure drive strength is supported */
if (strength < 2 || strength > 16 || (strength % 2))
return -ENOTSUPP;
base_address = pinctrl->pinconf_base;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(base_address + pin_data->pin_conf.offset);
val &= ~(NS2_PIN_DRIVE_STRENGTH_MASK << pin_data->pin_conf.drive_shift);
val |= ((strength / 2) - 1) << pin_data->pin_conf.drive_shift;
writel(val, (base_address + pin_data->pin_conf.offset));
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u set drive strength:%d mA\n",
pin, strength);
return 0;
}
static int ns2_pin_get_strength(struct pinctrl_dev *pctrldev, unsigned int pin,
u16 *strength)
{
struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev);
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
u32 val;
unsigned long flags;
spin_lock_irqsave(&pinctrl->lock, flags);
val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset);
*strength = (val >> pin_data->pin_conf.drive_shift) &
NS2_PIN_DRIVE_STRENGTH_MASK;
*strength = (*strength + 1) * 2;
spin_unlock_irqrestore(&pinctrl->lock, flags);
dev_dbg(pctrldev->dev, "pin:%u get drive strength:%d mA\n",
pin, *strength);
return 0;
}
static int ns2_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct ns2_pin *pin_data = pctldev->desc->pins[pin].drv_data;
enum pin_config_param param = pinconf_to_config_param(*config);
bool pull_up, pull_down;
u16 arg = 0;
int ret;
if (pin_data->pin_conf.base == -1)
return -ENOTSUPP;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down);
if ((pull_up == false) && (pull_down == false))
return 0;
else
return -EINVAL;
case PIN_CONFIG_BIAS_PULL_UP:
ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down);
if (pull_up)
return 0;
else
return -EINVAL;
case PIN_CONFIG_BIAS_PULL_DOWN:
ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down);
if (pull_down)
return 0;
else
return -EINVAL;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = ns2_pin_get_strength(pctldev, pin, &arg);
if (ret)
return ret;
*config = pinconf_to_config_packed(param, arg);
return 0;
case PIN_CONFIG_SLEW_RATE:
ret = ns2_pin_get_slew(pctldev, pin, &arg);
if (ret)
return ret;
*config = pinconf_to_config_packed(param, arg);
return 0;
case PIN_CONFIG_INPUT_ENABLE:
ret = ns2_pin_get_enable(pctldev, pin);
if (ret)
return 0;
else
return -EINVAL;
default:
return -ENOTSUPP;
}
}
static int ns2_pin_config_set(struct pinctrl_dev *pctrldev, unsigned int pin,
unsigned long *configs, unsigned int num_configs)
{
struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data;
enum pin_config_param param;
unsigned int i;
u32 arg;
int ret = -ENOTSUPP;
if (pin_data->pin_conf.base == -1)
return -ENOTSUPP;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
ret = ns2_pin_set_pull(pctrldev, pin, false, false);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = ns2_pin_set_pull(pctrldev, pin, true, false);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = ns2_pin_set_pull(pctrldev, pin, false, true);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = ns2_pin_set_strength(pctrldev, pin, arg);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_SLEW_RATE:
ret = ns2_pin_set_slew(pctrldev, pin, arg);
if (ret < 0)
goto out;
break;
case PIN_CONFIG_INPUT_ENABLE:
ret = ns2_pin_set_enable(pctrldev, pin, arg);
if (ret < 0)
goto out;
break;
default:
dev_err(pctrldev->dev, "invalid configuration\n");
return -ENOTSUPP;
}
}
out:
return ret;
}
static const struct pinmux_ops ns2_pinmux_ops = {
.get_functions_count = ns2_get_functions_count,
.get_function_name = ns2_get_function_name,
.get_function_groups = ns2_get_function_groups,
.set_mux = ns2_pinmux_enable,
};
static const struct pinconf_ops ns2_pinconf_ops = {
.is_generic = true,
.pin_config_get = ns2_pin_config_get,
.pin_config_set = ns2_pin_config_set,
};
static struct pinctrl_desc ns2_pinctrl_desc = {
.name = "ns2-pinmux",
.pctlops = &ns2_pinctrl_ops,
.pmxops = &ns2_pinmux_ops,
.confops = &ns2_pinconf_ops,
};
static int ns2_mux_log_init(struct ns2_pinctrl *pinctrl)
{
struct ns2_mux_log *log;
unsigned int i;
pinctrl->mux_log = devm_kcalloc(pinctrl->dev, NS2_NUM_IOMUX,
sizeof(struct ns2_mux_log),
GFP_KERNEL);
if (!pinctrl->mux_log)
return -ENOMEM;
for (i = 0; i < NS2_NUM_IOMUX; i++)
pinctrl->mux_log[i].is_configured = false;
/* Group 0 uses bit 31 in the IOMUX_PAD_FUNCTION_0 register */
log = &pinctrl->mux_log[0];
log->mux.base = NS2_PIN_MUX_BASE0;
log->mux.offset = 0;
log->mux.shift = 31;
log->mux.alt = 0;
/*
* Groups 1 through 14 use two bits each in the
* IOMUX_PAD_FUNCTION_1 register starting with
* bit position 30.
*/
for (i = 1; i < (NS2_NUM_IOMUX - NS2_NUM_PWM_MUX); i++) {
log = &pinctrl->mux_log[i];
log->mux.base = NS2_PIN_MUX_BASE0;
log->mux.offset = NS2_MUX_PAD_FUNC1_OFFSET;
log->mux.shift = 32 - (i * 2);
log->mux.alt = 0;
}
/*
* Groups 15 through 18 use one bit each in the
* AUX_SEL register.
*/
for (i = 0; i < NS2_NUM_PWM_MUX; i++) {
log = &pinctrl->mux_log[(NS2_NUM_IOMUX - NS2_NUM_PWM_MUX) + i];
log->mux.base = NS2_PIN_MUX_BASE1;
log->mux.offset = 0;
log->mux.shift = i;
log->mux.alt = 0;
}
return 0;
}
static int ns2_pinmux_probe(struct platform_device *pdev)
{
struct ns2_pinctrl *pinctrl;
struct resource *res;
int i, ret;
struct pinctrl_pin_desc *pins;
unsigned int num_pins = ARRAY_SIZE(ns2_pins);
pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL);
if (!pinctrl)
return -ENOMEM;
pinctrl->dev = &pdev->dev;
platform_set_drvdata(pdev, pinctrl);
spin_lock_init(&pinctrl->lock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pinctrl->base0 = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pinctrl->base0))
return PTR_ERR(pinctrl->base0);
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
pinctrl->base1 = devm_ioremap_nocache(&pdev->dev, res->start,
resource_size(res));
if (!pinctrl->base1) {
dev_err(&pdev->dev, "unable to map I/O space\n");
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
pinctrl->pinconf_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pinctrl->pinconf_base))
return PTR_ERR(pinctrl->pinconf_base);
ret = ns2_mux_log_init(pinctrl);
if (ret) {
dev_err(&pdev->dev, "unable to initialize IOMUX log\n");
return ret;
}
pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
for (i = 0; i < num_pins; i++) {
pins[i].number = ns2_pins[i].pin;
pins[i].name = ns2_pins[i].name;
pins[i].drv_data = &ns2_pins[i];
}
pinctrl->groups = ns2_pin_groups;
pinctrl->num_groups = ARRAY_SIZE(ns2_pin_groups);
pinctrl->functions = ns2_pin_functions;
pinctrl->num_functions = ARRAY_SIZE(ns2_pin_functions);
ns2_pinctrl_desc.pins = pins;
ns2_pinctrl_desc.npins = num_pins;
pinctrl->pctl = pinctrl_register(&ns2_pinctrl_desc, &pdev->dev,
pinctrl);
if (IS_ERR(pinctrl->pctl)) {
dev_err(&pdev->dev, "unable to register IOMUX pinctrl\n");
return PTR_ERR(pinctrl->pctl);
}
return 0;
}
static const struct of_device_id ns2_pinmux_of_match[] = {
{.compatible = "brcm,ns2-pinmux"},
{ }
};
static struct platform_driver ns2_pinmux_driver = {
.driver = {
.name = "ns2-pinmux",
.of_match_table = ns2_pinmux_of_match,
},
.probe = ns2_pinmux_probe,
};
static int __init ns2_pinmux_init(void)
{
return platform_driver_register(&ns2_pinmux_driver);
}
arch_initcall(ns2_pinmux_init);
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