pinctrl-sirf.c

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/*
 * pinmux driver for CSR SiRFprimaII
 *
 * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
 *
 * Licensed under GPLv2 or later.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/irq.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/irqdomain.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/of_gpio.h>
#include <asm/mach/irq.h>

#define DRIVER_NAME "pinmux-sirf"

#define SIRFSOC_NUM_PADS    622
#define SIRFSOC_RSC_PIN_MUX 0x4

#define SIRFSOC_GPIO_PAD_EN(g) ((g)*0x100 + 0x84)
#define SIRFSOC_GPIO_CTRL(g, i)         ((g)*0x100 + (i)*4)
#define SIRFSOC_GPIO_DSP_EN0            (0x80)
#define SIRFSOC_GPIO_PAD_EN(g)          ((g)*0x100 + 0x84)
#define SIRFSOC_GPIO_INT_STATUS(g)      ((g)*0x100 + 0x8C)

#define SIRFSOC_GPIO_CTL_INTR_LOW_MASK      0x1
#define SIRFSOC_GPIO_CTL_INTR_HIGH_MASK     0x2
#define SIRFSOC_GPIO_CTL_INTR_TYPE_MASK     0x4
#define SIRFSOC_GPIO_CTL_INTR_EN_MASK       0x8
#define SIRFSOC_GPIO_CTL_INTR_STS_MASK      0x10
#define SIRFSOC_GPIO_CTL_OUT_EN_MASK        0x20
#define SIRFSOC_GPIO_CTL_DATAOUT_MASK       0x40
#define SIRFSOC_GPIO_CTL_DATAIN_MASK        0x80
#define SIRFSOC_GPIO_CTL_PULL_MASK      0x100
#define SIRFSOC_GPIO_CTL_PULL_HIGH      0x200
#define SIRFSOC_GPIO_CTL_DSP_INT        0x400

#define SIRFSOC_GPIO_NO_OF_BANKS        5
#define SIRFSOC_GPIO_BANK_SIZE          32
#define SIRFSOC_GPIO_NUM(bank, index)   (((bank)*(32)) + (index))

struct sirfsoc_gpio_bank {
    struct of_mm_gpio_chip chip;
    struct irq_domain *domain;
    int id;
    int parent_irq;
    spinlock_t lock;
};

static struct sirfsoc_gpio_bank sgpio_bank[SIRFSOC_GPIO_NO_OF_BANKS];
static DEFINE_SPINLOCK(sgpio_lock);

/*
 * pad list for the pinmux subsystem
 * refer to CS-131858-DC-6A.xls
 */
static const struct pinctrl_pin_desc sirfsoc_pads[] = {
    PINCTRL_PIN(0, "gpio0-0"),
    PINCTRL_PIN(1, "gpio0-1"),
    PINCTRL_PIN(2, "gpio0-2"),
    PINCTRL_PIN(3, "gpio0-3"),
    PINCTRL_PIN(4, "pwm0"),
    PINCTRL_PIN(5, "pwm1"),
    PINCTRL_PIN(6, "pwm2"),
    PINCTRL_PIN(7, "pwm3"),
    PINCTRL_PIN(8, "warm_rst_b"),
    PINCTRL_PIN(9, "odo_0"),
    PINCTRL_PIN(10, "odo_1"),
    PINCTRL_PIN(11, "dr_dir"),
    PINCTRL_PIN(12, "viprom_fa"),
    PINCTRL_PIN(13, "scl_1"),
    PINCTRL_PIN(14, "ntrst"),
    PINCTRL_PIN(15, "sda_1"),
    PINCTRL_PIN(16, "x_ldd[16]"),
    PINCTRL_PIN(17, "x_ldd[17]"),
    PINCTRL_PIN(18, "x_ldd[18]"),
    PINCTRL_PIN(19, "x_ldd[19]"),
    PINCTRL_PIN(20, "x_ldd[20]"),
    PINCTRL_PIN(21, "x_ldd[21]"),
    PINCTRL_PIN(22, "x_ldd[22]"),
    PINCTRL_PIN(23, "x_ldd[23], lcdrom_frdy"),
    PINCTRL_PIN(24, "gps_sgn"),
    PINCTRL_PIN(25, "gps_mag"),
    PINCTRL_PIN(26, "gps_clk"),
    PINCTRL_PIN(27, "sd_cd_b_1"),
    PINCTRL_PIN(28, "sd_vcc_on_1"),
    PINCTRL_PIN(29, "sd_wp_b_1"),
    PINCTRL_PIN(30, "sd_clk_3"),
    PINCTRL_PIN(31, "sd_cmd_3"),

    PINCTRL_PIN(32, "x_sd_dat_3[0]"),
    PINCTRL_PIN(33, "x_sd_dat_3[1]"),
    PINCTRL_PIN(34, "x_sd_dat_3[2]"),
    PINCTRL_PIN(35, "x_sd_dat_3[3]"),
    PINCTRL_PIN(36, "x_sd_clk_4"),
    PINCTRL_PIN(37, "x_sd_cmd_4"),
    PINCTRL_PIN(38, "x_sd_dat_4[0]"),
    PINCTRL_PIN(39, "x_sd_dat_4[1]"),
    PINCTRL_PIN(40, "x_sd_dat_4[2]"),
    PINCTRL_PIN(41, "x_sd_dat_4[3]"),
    PINCTRL_PIN(42, "x_cko_1"),
    PINCTRL_PIN(43, "x_ac97_bit_clk"),
    PINCTRL_PIN(44, "x_ac97_dout"),
    PINCTRL_PIN(45, "x_ac97_din"),
    PINCTRL_PIN(46, "x_ac97_sync"),
    PINCTRL_PIN(47, "x_txd_1"),
    PINCTRL_PIN(48, "x_txd_2"),
    PINCTRL_PIN(49, "x_rxd_1"),
    PINCTRL_PIN(50, "x_rxd_2"),
    PINCTRL_PIN(51, "x_usclk_0"),
    PINCTRL_PIN(52, "x_utxd_0"),
    PINCTRL_PIN(53, "x_urxd_0"),
    PINCTRL_PIN(54, "x_utfs_0"),
    PINCTRL_PIN(55, "x_urfs_0"),
    PINCTRL_PIN(56, "x_usclk_1"),
    PINCTRL_PIN(57, "x_utxd_1"),
    PINCTRL_PIN(58, "x_urxd_1"),
    PINCTRL_PIN(59, "x_utfs_1"),
    PINCTRL_PIN(60, "x_urfs_1"),
    PINCTRL_PIN(61, "x_usclk_2"),
    PINCTRL_PIN(62, "x_utxd_2"),
    PINCTRL_PIN(63, "x_urxd_2"),

    PINCTRL_PIN(64, "x_utfs_2"),
    PINCTRL_PIN(65, "x_urfs_2"),
    PINCTRL_PIN(66, "x_df_we_b"),
    PINCTRL_PIN(67, "x_df_re_b"),
    PINCTRL_PIN(68, "x_txd_0"),
    PINCTRL_PIN(69, "x_rxd_0"),
    PINCTRL_PIN(78, "x_cko_0"),
    PINCTRL_PIN(79, "x_vip_pxd[7]"),
    PINCTRL_PIN(80, "x_vip_pxd[6]"),
    PINCTRL_PIN(81, "x_vip_pxd[5]"),
    PINCTRL_PIN(82, "x_vip_pxd[4]"),
    PINCTRL_PIN(83, "x_vip_pxd[3]"),
    PINCTRL_PIN(84, "x_vip_pxd[2]"),
    PINCTRL_PIN(85, "x_vip_pxd[1]"),
    PINCTRL_PIN(86, "x_vip_pxd[0]"),
    PINCTRL_PIN(87, "x_vip_vsync"),
    PINCTRL_PIN(88, "x_vip_hsync"),
    PINCTRL_PIN(89, "x_vip_pxclk"),
    PINCTRL_PIN(90, "x_sda_0"),
    PINCTRL_PIN(91, "x_scl_0"),
    PINCTRL_PIN(92, "x_df_ry_by"),
    PINCTRL_PIN(93, "x_df_cs_b[1]"),
    PINCTRL_PIN(94, "x_df_cs_b[0]"),
    PINCTRL_PIN(95, "x_l_pclk"),

    PINCTRL_PIN(96, "x_l_lck"),
    PINCTRL_PIN(97, "x_l_fck"),
    PINCTRL_PIN(98, "x_l_de"),
    PINCTRL_PIN(99, "x_ldd[0]"),
    PINCTRL_PIN(100, "x_ldd[1]"),
    PINCTRL_PIN(101, "x_ldd[2]"),
    PINCTRL_PIN(102, "x_ldd[3]"),
    PINCTRL_PIN(103, "x_ldd[4]"),
    PINCTRL_PIN(104, "x_ldd[5]"),
    PINCTRL_PIN(105, "x_ldd[6]"),
    PINCTRL_PIN(106, "x_ldd[7]"),
    PINCTRL_PIN(107, "x_ldd[8]"),
    PINCTRL_PIN(108, "x_ldd[9]"),
    PINCTRL_PIN(109, "x_ldd[10]"),
    PINCTRL_PIN(110, "x_ldd[11]"),
    PINCTRL_PIN(111, "x_ldd[12]"),
    PINCTRL_PIN(112, "x_ldd[13]"),
    PINCTRL_PIN(113, "x_ldd[14]"),
    PINCTRL_PIN(114, "x_ldd[15]"),
};

struct sirfsoc_pmx {
    struct device *dev;
    struct pinctrl_dev *pmx;
    void __iomem *gpio_virtbase;
    void __iomem *rsc_virtbase;
};

/* SIRFSOC_GPIO_PAD_EN set */
struct sirfsoc_muxmask {
    unsigned long group;
    unsigned long mask;
};

struct sirfsoc_padmux {
    unsigned long muxmask_counts;
    const struct sirfsoc_muxmask *muxmask;
    /* RSC_PIN_MUX set */
    unsigned long funcmask;
    unsigned long funcval;
};

struct sirfsoc_pin_group {
    const char *name;
    const unsigned int *pins;
    const unsigned num_pins;
};

static const struct sirfsoc_muxmask lcd_16bits_sirfsoc_muxmask[] = {
    {
        .group = 3,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) |
            BIT(9) | BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
            BIT(17) | BIT(18),
    }, {
        .group = 2,
        .mask = BIT(31),
    },
};

static const struct sirfsoc_padmux lcd_16bits_padmux = {
    .muxmask_counts = ARRAY_SIZE(lcd_16bits_sirfsoc_muxmask),
    .muxmask = lcd_16bits_sirfsoc_muxmask,
    .funcmask = BIT(4),
    .funcval = 0,
};

static const unsigned lcd_16bits_pins[] = { 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
    105, 106, 107, 108, 109, 110, 111, 112, 113, 114 };

static const struct sirfsoc_muxmask lcd_18bits_muxmask[] = {
    {
        .group = 3,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) |
            BIT(9) | BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
            BIT(17) | BIT(18),
    }, {
        .group = 2,
        .mask = BIT(31),
    }, {
        .group = 0,
        .mask = BIT(16) | BIT(17),
    },
};

static const struct sirfsoc_padmux lcd_18bits_padmux = {
    .muxmask_counts = ARRAY_SIZE(lcd_18bits_muxmask),
    .muxmask = lcd_18bits_muxmask,
    .funcmask = BIT(4),
    .funcval = 0,
};

static const unsigned lcd_18bits_pins[] = { 16, 17, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
    105, 106, 107, 108, 109, 110, 111, 112, 113, 114};

static const struct sirfsoc_muxmask lcd_24bits_muxmask[] = {
    {
        .group = 3,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) |
            BIT(9) | BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
            BIT(17) | BIT(18),
    }, {
        .group = 2,
        .mask = BIT(31),
    }, {
        .group = 0,
        .mask = BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(20) | BIT(21) | BIT(22) | BIT(23),
    },
};

static const struct sirfsoc_padmux lcd_24bits_padmux = {
    .muxmask_counts = ARRAY_SIZE(lcd_24bits_muxmask),
    .muxmask = lcd_24bits_muxmask,
    .funcmask = BIT(4),
    .funcval = 0,
};

static const unsigned lcd_24bits_pins[] = { 16, 17, 18, 19, 20, 21, 22, 23, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
    105, 106, 107, 108, 109, 110, 111, 112, 113, 114 };

static const struct sirfsoc_muxmask lcdrom_muxmask[] = {
    {
        .group = 3,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) |
            BIT(9) | BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15) | BIT(16) |
            BIT(17) | BIT(18),
    }, {
        .group = 2,
        .mask = BIT(31),
    }, {
        .group = 0,
        .mask = BIT(23),
    },
};

static const struct sirfsoc_padmux lcdrom_padmux = {
    .muxmask_counts = ARRAY_SIZE(lcdrom_muxmask),
    .muxmask = lcdrom_muxmask,
    .funcmask = BIT(4),
    .funcval = BIT(4),
};

static const unsigned lcdrom_pins[] = { 23, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104,
    105, 106, 107, 108, 109, 110, 111, 112, 113, 114 };

static const struct sirfsoc_muxmask uart0_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(4) | BIT(5),
    }, {
        .group = 1,
        .mask = BIT(23) | BIT(28),
    },
};

static const struct sirfsoc_padmux uart0_padmux = {
    .muxmask_counts = ARRAY_SIZE(uart0_muxmask),
    .muxmask = uart0_muxmask,
    .funcmask = BIT(9),
    .funcval = BIT(9),
};

static const unsigned uart0_pins[] = { 55, 60, 68, 69 };

static const struct sirfsoc_muxmask uart0_nostreamctrl_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(4) | BIT(5),
    },
};

static const struct sirfsoc_padmux uart0_nostreamctrl_padmux = {
    .muxmask_counts = ARRAY_SIZE(uart0_nostreamctrl_muxmask),
    .muxmask = uart0_nostreamctrl_muxmask,
};

static const unsigned uart0_nostreamctrl_pins[] = { 68, 39 };

static const struct sirfsoc_muxmask uart1_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(15) | BIT(17),
    },
};

static const struct sirfsoc_padmux uart1_padmux = {
    .muxmask_counts = ARRAY_SIZE(uart1_muxmask),
    .muxmask = uart1_muxmask,
};

static const unsigned uart1_pins[] = { 47, 49 };

static const struct sirfsoc_muxmask uart2_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(16) | BIT(18) | BIT(24) | BIT(27),
    },
};

static const struct sirfsoc_padmux uart2_padmux = {
    .muxmask_counts = ARRAY_SIZE(uart2_muxmask),
    .muxmask = uart2_muxmask,
    .funcmask = BIT(10),
    .funcval = BIT(10),
};

static const unsigned uart2_pins[] = { 48, 50, 56, 59 };

static const struct sirfsoc_muxmask uart2_nostreamctrl_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(16) | BIT(18),
    },
};

static const struct sirfsoc_padmux uart2_nostreamctrl_padmux = {
    .muxmask_counts = ARRAY_SIZE(uart2_nostreamctrl_muxmask),
    .muxmask = uart2_nostreamctrl_muxmask,
};

static const unsigned uart2_nostreamctrl_pins[] = { 48, 50 };

static const struct sirfsoc_muxmask sdmmc3_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(30) | BIT(31),
    }, {
        .group = 1,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3),
    },
};

static const struct sirfsoc_padmux sdmmc3_padmux = {
    .muxmask_counts = ARRAY_SIZE(sdmmc3_muxmask),
    .muxmask = sdmmc3_muxmask,
    .funcmask = BIT(7),
    .funcval = 0,
};

static const unsigned sdmmc3_pins[] = { 30, 31, 32, 33, 34, 35 };

static const struct sirfsoc_muxmask spi0_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(0) | BIT(1) | BIT(2) | BIT(3),
    },
};

static const struct sirfsoc_padmux spi0_padmux = {
    .muxmask_counts = ARRAY_SIZE(spi0_muxmask),
    .muxmask = spi0_muxmask,
    .funcmask = BIT(7),
    .funcval = BIT(7),
};

static const unsigned spi0_pins[] = { 32, 33, 34, 35 };

static const struct sirfsoc_muxmask sdmmc4_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) | BIT(9),
    },
};

static const struct sirfsoc_padmux sdmmc4_padmux = {
    .muxmask_counts = ARRAY_SIZE(sdmmc4_muxmask),
    .muxmask = sdmmc4_muxmask,
};

static const unsigned sdmmc4_pins[] = { 36, 37, 38, 39, 40, 41 };

static const struct sirfsoc_muxmask cko1_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(10),
    },
};

static const struct sirfsoc_padmux cko1_padmux = {
    .muxmask_counts = ARRAY_SIZE(cko1_muxmask),
    .muxmask = cko1_muxmask,
    .funcmask = BIT(3),
    .funcval = 0,
};

static const unsigned cko1_pins[] = { 42 };

static const struct sirfsoc_muxmask i2s_muxmask[] = {
    {
        .group = 1,
        .mask =
            BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(19)
                | BIT(23) | BIT(28),
    },
};

static const struct sirfsoc_padmux i2s_padmux = {
    .muxmask_counts = ARRAY_SIZE(i2s_muxmask),
    .muxmask = i2s_muxmask,
    .funcmask = BIT(3) | BIT(9),
    .funcval = BIT(3),
};

static const unsigned i2s_pins[] = { 42, 43, 44, 45, 46, 51, 55, 60 };

static const struct sirfsoc_muxmask ac97_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(11) | BIT(12) | BIT(13) | BIT(14),
    },
};

static const struct sirfsoc_padmux ac97_padmux = {
    .muxmask_counts = ARRAY_SIZE(ac97_muxmask),
    .muxmask = ac97_muxmask,
    .funcmask = BIT(8),
    .funcval = 0,
};

static const unsigned ac97_pins[] = { 33, 34, 35, 36 };

static const struct sirfsoc_muxmask spi1_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(11) | BIT(12) | BIT(13) | BIT(14),
    },
};

static const struct sirfsoc_padmux spi1_padmux = {
    .muxmask_counts = ARRAY_SIZE(spi1_muxmask),
    .muxmask = spi1_muxmask,
    .funcmask = BIT(8),
    .funcval = BIT(8),
};

static const unsigned spi1_pins[] = { 43, 44, 45, 46 };

static const struct sirfsoc_muxmask sdmmc1_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(27) | BIT(28) | BIT(29),
    },
};

static const struct sirfsoc_padmux sdmmc1_padmux = {
    .muxmask_counts = ARRAY_SIZE(sdmmc1_muxmask),
    .muxmask = sdmmc1_muxmask,
};

static const unsigned sdmmc1_pins[] = { 27, 28, 29 };

static const struct sirfsoc_muxmask gps_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(24) | BIT(25) | BIT(26),
    },
};

static const struct sirfsoc_padmux gps_padmux = {
    .muxmask_counts = ARRAY_SIZE(gps_muxmask),
    .muxmask = gps_muxmask,
    .funcmask = BIT(12) | BIT(13) | BIT(14),
    .funcval = BIT(12),
};

static const unsigned gps_pins[] = { 24, 25, 26 };

static const struct sirfsoc_muxmask sdmmc5_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(24) | BIT(25) | BIT(26),
    }, {
        .group = 1,
        .mask = BIT(29),
    }, {
        .group = 2,
        .mask = BIT(0) | BIT(1),
    },
};

static const struct sirfsoc_padmux sdmmc5_padmux = {
    .muxmask_counts = ARRAY_SIZE(sdmmc5_muxmask),
    .muxmask = sdmmc5_muxmask,
    .funcmask = BIT(13) | BIT(14),
    .funcval = BIT(13) | BIT(14),
};

static const unsigned sdmmc5_pins[] = { 24, 25, 26, 61, 64, 65 };

static const struct sirfsoc_muxmask usp0_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(19) | BIT(20) | BIT(21) | BIT(22) | BIT(23),
    },
};

static const struct sirfsoc_padmux usp0_padmux = {
    .muxmask_counts = ARRAY_SIZE(usp0_muxmask),
    .muxmask = usp0_muxmask,
    .funcmask = BIT(1) | BIT(2) | BIT(6) | BIT(9),
    .funcval = 0,
};

static const unsigned usp0_pins[] = { 51, 52, 53, 54, 55 };

static const struct sirfsoc_muxmask usp1_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(24) | BIT(25) | BIT(26) | BIT(27) | BIT(28),
    },
};

static const struct sirfsoc_padmux usp1_padmux = {
    .muxmask_counts = ARRAY_SIZE(usp1_muxmask),
    .muxmask = usp1_muxmask,
    .funcmask = BIT(1) | BIT(9) | BIT(10) | BIT(11),
    .funcval = 0,
};

static const unsigned usp1_pins[] = { 56, 57, 58, 59, 60 };

static const struct sirfsoc_muxmask usp2_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(29) | BIT(30) | BIT(31),
    }, {
        .group = 2,
        .mask = BIT(0) | BIT(1),
    },
};

static const struct sirfsoc_padmux usp2_padmux = {
    .muxmask_counts = ARRAY_SIZE(usp2_muxmask),
    .muxmask = usp2_muxmask,
    .funcmask = BIT(13) | BIT(14),
    .funcval = 0,
};

static const unsigned usp2_pins[] = { 61, 62, 63, 64, 65 };

static const struct sirfsoc_muxmask nand_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(2) | BIT(3) | BIT(28) | BIT(29) | BIT(30),
    },
};

static const struct sirfsoc_padmux nand_padmux = {
    .muxmask_counts = ARRAY_SIZE(nand_muxmask),
    .muxmask = nand_muxmask,
    .funcmask = BIT(5),
    .funcval = 0,
};

static const unsigned nand_pins[] = { 64, 65, 92, 93, 94 };

static const struct sirfsoc_padmux sdmmc0_padmux = {
    .muxmask_counts = 0,
    .funcmask = BIT(5),
    .funcval = 0,
};

static const unsigned sdmmc0_pins[] = { };

static const struct sirfsoc_muxmask sdmmc2_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(2) | BIT(3),
    },
};

static const struct sirfsoc_padmux sdmmc2_padmux = {
    .muxmask_counts = ARRAY_SIZE(sdmmc2_muxmask),
    .muxmask = sdmmc2_muxmask,
    .funcmask = BIT(5),
    .funcval = BIT(5),
};

static const unsigned sdmmc2_pins[] = { 66, 67 };

static const struct sirfsoc_muxmask cko0_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(14),
    },
};

static const struct sirfsoc_padmux cko0_padmux = {
    .muxmask_counts = ARRAY_SIZE(cko0_muxmask),
    .muxmask = cko0_muxmask,
};

static const unsigned cko0_pins[] = { 78 };

static const struct sirfsoc_muxmask vip_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(15) | BIT(16) | BIT(17) | BIT(18) | BIT(19)
            | BIT(20) | BIT(21) | BIT(22) | BIT(23) | BIT(24) |
            BIT(25),
    },
};

static const struct sirfsoc_padmux vip_padmux = {
    .muxmask_counts = ARRAY_SIZE(vip_muxmask),
    .muxmask = vip_muxmask,
    .funcmask = BIT(0),
    .funcval = 0,
};

static const unsigned vip_pins[] = { 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89 };

static const struct sirfsoc_muxmask i2c0_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(26) | BIT(27),
    },
};

static const struct sirfsoc_padmux i2c0_padmux = {
    .muxmask_counts = ARRAY_SIZE(i2c0_muxmask),
    .muxmask = i2c0_muxmask,
};

static const unsigned i2c0_pins[] = { 90, 91 };

static const struct sirfsoc_muxmask i2c1_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(13) | BIT(15),
    },
};

static const struct sirfsoc_padmux i2c1_padmux = {
    .muxmask_counts = ARRAY_SIZE(i2c1_muxmask),
    .muxmask = i2c1_muxmask,
};

static const unsigned i2c1_pins[] = { 13, 15 };

static const struct sirfsoc_muxmask viprom_muxmask[] = {
    {
        .group = 2,
        .mask = BIT(15) | BIT(16) | BIT(17) | BIT(18) | BIT(19)
            | BIT(20) | BIT(21) | BIT(22) | BIT(23) | BIT(24) |
            BIT(25),
    }, {
        .group = 0,
        .mask = BIT(12),
    },
};

static const struct sirfsoc_padmux viprom_padmux = {
    .muxmask_counts = ARRAY_SIZE(viprom_muxmask),
    .muxmask = viprom_muxmask,
    .funcmask = BIT(0),
    .funcval = BIT(0),
};

static const unsigned viprom_pins[] = { 12, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89 };

static const struct sirfsoc_muxmask pwm0_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(4),
    },
};

static const struct sirfsoc_padmux pwm0_padmux = {
    .muxmask_counts = ARRAY_SIZE(pwm0_muxmask),
    .muxmask = pwm0_muxmask,
    .funcmask = BIT(12),
    .funcval = 0,
};

static const unsigned pwm0_pins[] = { 4 };

static const struct sirfsoc_muxmask pwm1_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(5),
    },
};

static const struct sirfsoc_padmux pwm1_padmux = {
    .muxmask_counts = ARRAY_SIZE(pwm1_muxmask),
    .muxmask = pwm1_muxmask,
};

static const unsigned pwm1_pins[] = { 5 };

static const struct sirfsoc_muxmask pwm2_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(6),
    },
};

static const struct sirfsoc_padmux pwm2_padmux = {
    .muxmask_counts = ARRAY_SIZE(pwm2_muxmask),
    .muxmask = pwm2_muxmask,
};

static const unsigned pwm2_pins[] = { 6 };

static const struct sirfsoc_muxmask pwm3_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(7),
    },
};

static const struct sirfsoc_padmux pwm3_padmux = {
    .muxmask_counts = ARRAY_SIZE(pwm3_muxmask),
    .muxmask = pwm3_muxmask,
};

static const unsigned pwm3_pins[] = { 7 };

static const struct sirfsoc_muxmask warm_rst_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(8),
    },
};

static const struct sirfsoc_padmux warm_rst_padmux = {
    .muxmask_counts = ARRAY_SIZE(warm_rst_muxmask),
    .muxmask = warm_rst_muxmask,
};

static const unsigned warm_rst_pins[] = { 8 };

static const struct sirfsoc_muxmask usb0_utmi_drvbus_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(22),
    },
};
static const struct sirfsoc_padmux usb0_utmi_drvbus_padmux = {
    .muxmask_counts = ARRAY_SIZE(usb0_utmi_drvbus_muxmask),
    .muxmask = usb0_utmi_drvbus_muxmask,
    .funcmask = BIT(6),
    .funcval = BIT(6), /* refer to PAD_UTMI_DRVVBUS0_ENABLE */
};

static const unsigned usb0_utmi_drvbus_pins[] = { 54 };

static const struct sirfsoc_muxmask usb1_utmi_drvbus_muxmask[] = {
    {
        .group = 1,
        .mask = BIT(27),
    },
};

static const struct sirfsoc_padmux usb1_utmi_drvbus_padmux = {
    .muxmask_counts = ARRAY_SIZE(usb1_utmi_drvbus_muxmask),
    .muxmask = usb1_utmi_drvbus_muxmask,
    .funcmask = BIT(11),
    .funcval = BIT(11), /* refer to PAD_UTMI_DRVVBUS1_ENABLE */
};

static const unsigned usb1_utmi_drvbus_pins[] = { 59 };

static const struct sirfsoc_muxmask pulse_count_muxmask[] = {
    {
        .group = 0,
        .mask = BIT(9) | BIT(10) | BIT(11),
    },
};

static const struct sirfsoc_padmux pulse_count_padmux = {
    .muxmask_counts = ARRAY_SIZE(pulse_count_muxmask),
    .muxmask = pulse_count_muxmask,
};

static const unsigned pulse_count_pins[] = { 9, 10, 11 };

#define SIRFSOC_PIN_GROUP(n, p)  \
    {           \
        .name = n,  \
        .pins = p,  \
        .num_pins = ARRAY_SIZE(p),  \
    }

static const struct sirfsoc_pin_group sirfsoc_pin_groups[] = {
    SIRFSOC_PIN_GROUP("lcd_16bitsgrp", lcd_16bits_pins),
    SIRFSOC_PIN_GROUP("lcd_18bitsgrp", lcd_18bits_pins),
    SIRFSOC_PIN_GROUP("lcd_24bitsgrp", lcd_24bits_pins),
    SIRFSOC_PIN_GROUP("lcdrom_grp", lcdrom_pins),
    SIRFSOC_PIN_GROUP("uart0grp", uart0_pins),
    SIRFSOC_PIN_GROUP("uart1grp", uart1_pins),
    SIRFSOC_PIN_GROUP("uart2grp", uart2_pins),
    SIRFSOC_PIN_GROUP("uart2_nostreamctrlgrp", uart2_nostreamctrl_pins),
    SIRFSOC_PIN_GROUP("usp0grp", usp0_pins),
    SIRFSOC_PIN_GROUP("usp1grp", usp1_pins),
    SIRFSOC_PIN_GROUP("usp2grp", usp2_pins),
    SIRFSOC_PIN_GROUP("i2c0grp", i2c0_pins),
    SIRFSOC_PIN_GROUP("i2c1grp", i2c1_pins),
    SIRFSOC_PIN_GROUP("pwm0grp", pwm0_pins),
    SIRFSOC_PIN_GROUP("pwm1grp", pwm1_pins),
    SIRFSOC_PIN_GROUP("pwm2grp", pwm2_pins),
    SIRFSOC_PIN_GROUP("pwm3grp", pwm3_pins),
    SIRFSOC_PIN_GROUP("vipgrp", vip_pins),
    SIRFSOC_PIN_GROUP("vipromgrp", viprom_pins),
    SIRFSOC_PIN_GROUP("warm_rstgrp", warm_rst_pins),
    SIRFSOC_PIN_GROUP("cko0_rstgrp", cko0_pins),
    SIRFSOC_PIN_GROUP("cko1_rstgrp", cko1_pins),
    SIRFSOC_PIN_GROUP("sdmmc0grp", sdmmc0_pins),
    SIRFSOC_PIN_GROUP("sdmmc1grp", sdmmc1_pins),
    SIRFSOC_PIN_GROUP("sdmmc2grp", sdmmc2_pins),
    SIRFSOC_PIN_GROUP("sdmmc3grp", sdmmc3_pins),
    SIRFSOC_PIN_GROUP("sdmmc4grp", sdmmc4_pins),
    SIRFSOC_PIN_GROUP("sdmmc5grp", sdmmc5_pins),
    SIRFSOC_PIN_GROUP("usb0_utmi_drvbusgrp", usb0_utmi_drvbus_pins),
    SIRFSOC_PIN_GROUP("usb1_utmi_drvbusgrp", usb1_utmi_drvbus_pins),
    SIRFSOC_PIN_GROUP("pulse_countgrp", pulse_count_pins),
    SIRFSOC_PIN_GROUP("i2sgrp", i2s_pins),
    SIRFSOC_PIN_GROUP("ac97grp", ac97_pins),
    SIRFSOC_PIN_GROUP("nandgrp", nand_pins),
    SIRFSOC_PIN_GROUP("spi0grp", spi0_pins),
    SIRFSOC_PIN_GROUP("spi1grp", spi1_pins),
    SIRFSOC_PIN_GROUP("gpsgrp", gps_pins),
};

static int sirfsoc_get_groups_count(struct pinctrl_dev *pctldev)
{
    return ARRAY_SIZE(sirfsoc_pin_groups);
}

static const char *sirfsoc_get_group_name(struct pinctrl_dev *pctldev,
                       unsigned selector)
{
    return sirfsoc_pin_groups[selector].name;
}

static int sirfsoc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
                   const unsigned **pins,
                   unsigned *num_pins)
{
    *pins = sirfsoc_pin_groups[selector].pins;
    *num_pins = sirfsoc_pin_groups[selector].num_pins;
    return 0;
}

static void sirfsoc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
           unsigned offset)
{
    seq_printf(s, " " DRIVER_NAME);
}

static int sirfsoc_dt_node_to_map(struct pinctrl_dev *pctldev,
                 struct device_node *np_config,
                 struct pinctrl_map **map, unsigned *num_maps)
{
    struct sirfsoc_pmx *spmx = pinctrl_dev_get_drvdata(pctldev);
    struct device_node *np;
    struct property *prop;
    const char *function, *group;
    int ret, index = 0, count = 0;

    /* calculate number of maps required */
    for_each_child_of_node(np_config, np) {
        ret = of_property_read_string(np, "sirf,function", &function);
        if (ret < 0)
            return ret;

        ret = of_property_count_strings(np, "sirf,pins");
        if (ret < 0)
            return ret;

        count += ret;
    }

    if (!count) {
        dev_err(spmx->dev, "No child nodes passed via DT\n");
        return -ENODEV;
    }

    *map = kzalloc(sizeof(**map) * count, GFP_KERNEL);
    if (!*map)
        return -ENOMEM;

    for_each_child_of_node(np_config, np) {
        of_property_read_string(np, "sirf,function", &function);
        of_property_for_each_string(np, "sirf,pins", prop, group) {
            (*map)[index].type = PIN_MAP_TYPE_MUX_GROUP;
            (*map)[index].data.mux.group = group;
            (*map)[index].data.mux.function = function;
            index++;
        }
    }

    *num_maps = count;

    return 0;
}

static void sirfsoc_dt_free_map(struct pinctrl_dev *pctldev,
        struct pinctrl_map *map, unsigned num_maps)
{
    kfree(map);
}

static struct pinctrl_ops sirfsoc_pctrl_ops = {
    .get_groups_count = sirfsoc_get_groups_count,
    .get_group_name = sirfsoc_get_group_name,
    .get_group_pins = sirfsoc_get_group_pins,
    .pin_dbg_show = sirfsoc_pin_dbg_show,
    .dt_node_to_map = sirfsoc_dt_node_to_map,
    .dt_free_map = sirfsoc_dt_free_map,
};

struct sirfsoc_pmx_func {
    const char *name;
    const char * const *groups;
    const unsigned num_groups;
    const struct sirfsoc_padmux *padmux;
};

static const char * const lcd_16bitsgrp[] = { "lcd_16bitsgrp" };
static const char * const lcd_18bitsgrp[] = { "lcd_18bitsgrp" };
static const char * const lcd_24bitsgrp[] = { "lcd_24bitsgrp" };
static const char * const lcdromgrp[] = { "lcdromgrp" };
static const char * const uart0grp[] = { "uart0grp" };
static const char * const uart1grp[] = { "uart1grp" };
static const char * const uart2grp[] = { "uart2grp" };
static const char * const uart2_nostreamctrlgrp[] = { "uart2_nostreamctrlgrp" };
static const char * const usp0grp[] = { "usp0grp" };
static const char * const usp1grp[] = { "usp1grp" };
static const char * const usp2grp[] = { "usp2grp" };
static const char * const i2c0grp[] = { "i2c0grp" };
static const char * const i2c1grp[] = { "i2c1grp" };
static const char * const pwm0grp[] = { "pwm0grp" };
static const char * const pwm1grp[] = { "pwm1grp" };
static const char * const pwm2grp[] = { "pwm2grp" };
static const char * const pwm3grp[] = { "pwm3grp" };
static const char * const vipgrp[] = { "vipgrp" };
static const char * const vipromgrp[] = { "vipromgrp" };
static const char * const warm_rstgrp[] = { "warm_rstgrp" };
static const char * const cko0grp[] = { "cko0grp" };
static const char * const cko1grp[] = { "cko1grp" };
static const char * const sdmmc0grp[] = { "sdmmc0grp" };
static const char * const sdmmc1grp[] = { "sdmmc1grp" };
static const char * const sdmmc2grp[] = { "sdmmc2grp" };
static const char * const sdmmc3grp[] = { "sdmmc3grp" };
static const char * const sdmmc4grp[] = { "sdmmc4grp" };
static const char * const sdmmc5grp[] = { "sdmmc5grp" };
static const char * const usb0_utmi_drvbusgrp[] = { "usb0_utmi_drvbusgrp" };
static const char * const usb1_utmi_drvbusgrp[] = { "usb1_utmi_drvbusgrp" };
static const char * const pulse_countgrp[] = { "pulse_countgrp" };
static const char * const i2sgrp[] = { "i2sgrp" };
static const char * const ac97grp[] = { "ac97grp" };
static const char * const nandgrp[] = { "nandgrp" };
static const char * const spi0grp[] = { "spi0grp" };
static const char * const spi1grp[] = { "spi1grp" };
static const char * const gpsgrp[] = { "gpsgrp" };

#define SIRFSOC_PMX_FUNCTION(n, g, m)       \
    {                   \
        .name = n,          \
        .groups = g,            \
        .num_groups = ARRAY_SIZE(g),    \
        .padmux = &m,           \
    }

static const struct sirfsoc_pmx_func sirfsoc_pmx_functions[] = {
    SIRFSOC_PMX_FUNCTION("lcd_16bits", lcd_16bitsgrp, lcd_16bits_padmux),
    SIRFSOC_PMX_FUNCTION("lcd_18bits", lcd_18bitsgrp, lcd_18bits_padmux),
    SIRFSOC_PMX_FUNCTION("lcd_24bits", lcd_24bitsgrp, lcd_24bits_padmux),
    SIRFSOC_PMX_FUNCTION("lcdrom", lcdromgrp, lcdrom_padmux),
    SIRFSOC_PMX_FUNCTION("uart0", uart0grp, uart0_padmux),
    SIRFSOC_PMX_FUNCTION("uart1", uart1grp, uart1_padmux),
    SIRFSOC_PMX_FUNCTION("uart2", uart2grp, uart2_padmux),
    SIRFSOC_PMX_FUNCTION("uart2_nostreamctrl", uart2_nostreamctrlgrp, uart2_nostreamctrl_padmux),
    SIRFSOC_PMX_FUNCTION("usp0", usp0grp, usp0_padmux),
    SIRFSOC_PMX_FUNCTION("usp1", usp1grp, usp1_padmux),
    SIRFSOC_PMX_FUNCTION("usp2", usp2grp, usp2_padmux),
    SIRFSOC_PMX_FUNCTION("i2c0", i2c0grp, i2c0_padmux),
    SIRFSOC_PMX_FUNCTION("i2c1", i2c1grp, i2c1_padmux),
    SIRFSOC_PMX_FUNCTION("pwm0", pwm0grp, pwm0_padmux),
    SIRFSOC_PMX_FUNCTION("pwm1", pwm1grp, pwm1_padmux),
    SIRFSOC_PMX_FUNCTION("pwm2", pwm2grp, pwm2_padmux),
    SIRFSOC_PMX_FUNCTION("pwm3", pwm3grp, pwm3_padmux),
    SIRFSOC_PMX_FUNCTION("vip", vipgrp, vip_padmux),
    SIRFSOC_PMX_FUNCTION("viprom", vipromgrp, viprom_padmux),
    SIRFSOC_PMX_FUNCTION("warm_rst", warm_rstgrp, warm_rst_padmux),
    SIRFSOC_PMX_FUNCTION("cko0", cko0grp, cko0_padmux),
    SIRFSOC_PMX_FUNCTION("cko1", cko1grp, cko1_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc0", sdmmc0grp, sdmmc0_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc1", sdmmc1grp, sdmmc1_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc2", sdmmc2grp, sdmmc2_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc3", sdmmc3grp, sdmmc3_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc4", sdmmc4grp, sdmmc4_padmux),
    SIRFSOC_PMX_FUNCTION("sdmmc5", sdmmc5grp, sdmmc5_padmux),
    SIRFSOC_PMX_FUNCTION("usb0_utmi_drvbus", usb0_utmi_drvbusgrp, usb0_utmi_drvbus_padmux),
    SIRFSOC_PMX_FUNCTION("usb1_utmi_drvbus", usb1_utmi_drvbusgrp, usb1_utmi_drvbus_padmux),
    SIRFSOC_PMX_FUNCTION("pulse_count", pulse_countgrp, pulse_count_padmux),
    SIRFSOC_PMX_FUNCTION("i2s", i2sgrp, i2s_padmux),
    SIRFSOC_PMX_FUNCTION("ac97", ac97grp, ac97_padmux),
    SIRFSOC_PMX_FUNCTION("nand", nandgrp, nand_padmux),
    SIRFSOC_PMX_FUNCTION("spi0", spi0grp, spi0_padmux),
    SIRFSOC_PMX_FUNCTION("spi1", spi1grp, spi1_padmux),
    SIRFSOC_PMX_FUNCTION("gps", gpsgrp, gps_padmux),
};

static void sirfsoc_pinmux_endisable(struct sirfsoc_pmx *spmx, unsigned selector,
    bool enable)
{
    int i;
    const struct sirfsoc_padmux *mux = sirfsoc_pmx_functions[selector].padmux;
    const struct sirfsoc_muxmask *mask = mux->muxmask;

    for (i = 0; i < mux->muxmask_counts; i++) {
        u32 muxval;
        muxval = readl(spmx->gpio_virtbase + SIRFSOC_GPIO_PAD_EN(mask[i].group));
        if (enable)
            muxval = muxval & ~mask[i].mask;
        else
            muxval = muxval | mask[i].mask;
        writel(muxval, spmx->gpio_virtbase + SIRFSOC_GPIO_PAD_EN(mask[i].group));
    }

    if (mux->funcmask && enable) {
        u32 func_en_val;
        func_en_val =
            readl(spmx->rsc_virtbase + SIRFSOC_RSC_PIN_MUX);
        func_en_val =
            (func_en_val & ~mux->funcmask) | (mux->
                funcval);
        writel(func_en_val, spmx->rsc_virtbase + SIRFSOC_RSC_PIN_MUX);
    }
}

static int sirfsoc_pinmux_enable(struct pinctrl_dev *pmxdev, unsigned selector,
    unsigned group)
{
    struct sirfsoc_pmx *spmx;

    spmx = pinctrl_dev_get_drvdata(pmxdev);
    sirfsoc_pinmux_endisable(spmx, selector, true);

    return 0;
}

static void sirfsoc_pinmux_disable(struct pinctrl_dev *pmxdev, unsigned selector,
    unsigned group)
{
    struct sirfsoc_pmx *spmx;

    spmx = pinctrl_dev_get_drvdata(pmxdev);
    sirfsoc_pinmux_endisable(spmx, selector, false);
}

static int sirfsoc_pinmux_get_funcs_count(struct pinctrl_dev *pmxdev)
{
    return ARRAY_SIZE(sirfsoc_pmx_functions);
}

static const char *sirfsoc_pinmux_get_func_name(struct pinctrl_dev *pctldev,
                      unsigned selector)
{
    return sirfsoc_pmx_functions[selector].name;
}

static int sirfsoc_pinmux_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
                   const char * const **groups,
                   unsigned * const num_groups)
{
    *groups = sirfsoc_pmx_functions[selector].groups;
    *num_groups = sirfsoc_pmx_functions[selector].num_groups;
    return 0;
}

static int sirfsoc_pinmux_request_gpio(struct pinctrl_dev *pmxdev,
    struct pinctrl_gpio_range *range, unsigned offset)
{
    struct sirfsoc_pmx *spmx;

    int group = range->id;

    u32 muxval;

    spmx = pinctrl_dev_get_drvdata(pmxdev);

    muxval = readl(spmx->gpio_virtbase + SIRFSOC_GPIO_PAD_EN(group));
    muxval = muxval | (1 << (offset - range->pin_base));
    writel(muxval, spmx->gpio_virtbase + SIRFSOC_GPIO_PAD_EN(group));

    return 0;
}

static struct pinmux_ops sirfsoc_pinmux_ops = {
    .enable = sirfsoc_pinmux_enable,
    .disable = sirfsoc_pinmux_disable,
    .get_functions_count = sirfsoc_pinmux_get_funcs_count,
    .get_function_name = sirfsoc_pinmux_get_func_name,
    .get_function_groups = sirfsoc_pinmux_get_groups,
    .gpio_request_enable = sirfsoc_pinmux_request_gpio,
};

static struct pinctrl_desc sirfsoc_pinmux_desc = {
    .name = DRIVER_NAME,
    .pins = sirfsoc_pads,
    .npins = ARRAY_SIZE(sirfsoc_pads),
    .pctlops = &sirfsoc_pctrl_ops,
    .pmxops = &sirfsoc_pinmux_ops,
    .owner = THIS_MODULE,
};

/*
 * Todo: bind irq_chip to every pinctrl_gpio_range
 */
static struct pinctrl_gpio_range sirfsoc_gpio_ranges[] = {
    {
        .name = "sirfsoc-gpio*",
        .id = 0,
        .base = 0,
        .pin_base = 0,
        .npins = 32,
    }, {
        .name = "sirfsoc-gpio*",
        .id = 1,
        .base = 32,
        .pin_base = 32,
        .npins = 32,
    }, {
        .name = "sirfsoc-gpio*",
        .id = 2,
        .base = 64,
        .pin_base = 64,
        .npins = 32,
    }, {
        .name = "sirfsoc-gpio*",
        .id = 3,
        .base = 96,
        .pin_base = 96,
        .npins = 19,
    },
};

static void __iomem *sirfsoc_rsc_of_iomap(void)
{
    const struct of_device_id rsc_ids[]  = {
        { .compatible = "sirf,prima2-rsc" },
        {}
    };
    struct device_node *np;

    np = of_find_matching_node(NULL, rsc_ids);
    if (!np)
        panic("unable to find compatible rsc node in dtb\n");

    return of_iomap(np, 0);
}

static int __devinit sirfsoc_pinmux_probe(struct platform_device *pdev)
{
    int ret;
    struct sirfsoc_pmx *spmx;
    struct device_node *np = pdev->dev.of_node;
    int i;

    /* Create state holders etc for this driver */
    spmx = devm_kzalloc(&pdev->dev, sizeof(*spmx), GFP_KERNEL);
    if (!spmx)
        return -ENOMEM;

    spmx->dev = &pdev->dev;

    platform_set_drvdata(pdev, spmx);

    spmx->gpio_virtbase = of_iomap(np, 0);
    if (!spmx->gpio_virtbase) {
        ret = -ENOMEM;
        dev_err(&pdev->dev, "can't map gpio registers\n");
        goto out_no_gpio_remap;
    }

    spmx->rsc_virtbase = sirfsoc_rsc_of_iomap();
    if (!spmx->rsc_virtbase) {
        ret = -ENOMEM;
        dev_err(&pdev->dev, "can't map rsc registers\n");
        goto out_no_rsc_remap;
    }

    /* Now register the pin controller and all pins it handles */
    spmx->pmx = pinctrl_register(&sirfsoc_pinmux_desc, &pdev->dev, spmx);
    if (!spmx->pmx) {
        dev_err(&pdev->dev, "could not register SIRFSOC pinmux driver\n");
        ret = -EINVAL;
        goto out_no_pmx;
    }

    for (i = 0; i < ARRAY_SIZE(sirfsoc_gpio_ranges); i++) {
        sirfsoc_gpio_ranges[i].gc = &sgpio_bank[i].chip.gc;
        pinctrl_add_gpio_range(spmx->pmx, &sirfsoc_gpio_ranges[i]);
    }

    dev_info(&pdev->dev, "initialized SIRFSOC pinmux driver\n");

    return 0;

out_no_pmx:
    iounmap(spmx->rsc_virtbase);
out_no_rsc_remap:
    iounmap(spmx->gpio_virtbase);
out_no_gpio_remap:
    platform_set_drvdata(pdev, NULL);
    return ret;
}

static const struct of_device_id pinmux_ids[] __devinitconst = {
    { .compatible = "sirf,prima2-pinctrl" },
    {}
};

static struct platform_driver sirfsoc_pinmux_driver = {
    .driver = {
        .name = DRIVER_NAME,
        .owner = THIS_MODULE,
        .of_match_table = pinmux_ids,
    },
    .probe = sirfsoc_pinmux_probe,
};

static int __init sirfsoc_pinmux_init(void)
{
    return platform_driver_register(&sirfsoc_pinmux_driver);
}
arch_initcall(sirfsoc_pinmux_init);

static inline int sirfsoc_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
    struct sirfsoc_gpio_bank *bank = container_of(to_of_mm_gpio_chip(chip),
        struct sirfsoc_gpio_bank, chip);

    return irq_find_mapping(bank->domain, offset);
}

static inline int sirfsoc_gpio_to_offset(unsigned int gpio)
{
    return gpio % SIRFSOC_GPIO_BANK_SIZE;
}

static inline struct sirfsoc_gpio_bank *sirfsoc_gpio_to_bank(unsigned int gpio)
{
    return &sgpio_bank[gpio / SIRFSOC_GPIO_BANK_SIZE];
}

static inline struct sirfsoc_gpio_bank *sirfsoc_irqchip_to_bank(struct gpio_chip *chip)
{
    return container_of(to_of_mm_gpio_chip(chip), struct sirfsoc_gpio_bank, chip);
}

static void sirfsoc_gpio_irq_ack(struct irq_data *d)
{
    struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
    int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
    u32 val, offset;
    unsigned long flags;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&sgpio_lock, flags);

    val = readl(bank->chip.regs + offset);

    writel(val, bank->chip.regs + offset);

    spin_unlock_irqrestore(&sgpio_lock, flags);
}

static void __sirfsoc_gpio_irq_mask(struct sirfsoc_gpio_bank *bank, int idx)
{
    u32 val, offset;
    unsigned long flags;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&sgpio_lock, flags);

    val = readl(bank->chip.regs + offset);
    val &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
    val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
    writel(val, bank->chip.regs + offset);

    spin_unlock_irqrestore(&sgpio_lock, flags);
}

static void sirfsoc_gpio_irq_mask(struct irq_data *d)
{
    struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);

    __sirfsoc_gpio_irq_mask(bank, d->hwirq % SIRFSOC_GPIO_BANK_SIZE);
}

static void sirfsoc_gpio_irq_unmask(struct irq_data *d)
{
    struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
    int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
    u32 val, offset;
    unsigned long flags;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&sgpio_lock, flags);

    val = readl(bank->chip.regs + offset);
    val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;
    val |= SIRFSOC_GPIO_CTL_INTR_EN_MASK;
    writel(val, bank->chip.regs + offset);

    spin_unlock_irqrestore(&sgpio_lock, flags);
}

static int sirfsoc_gpio_irq_type(struct irq_data *d, unsigned type)
{
    struct sirfsoc_gpio_bank *bank = irq_data_get_irq_chip_data(d);
    int idx = d->hwirq % SIRFSOC_GPIO_BANK_SIZE;
    u32 val, offset;
    unsigned long flags;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&sgpio_lock, flags);

    val = readl(bank->chip.regs + offset);
    val &= ~SIRFSOC_GPIO_CTL_INTR_STS_MASK;

    switch (type) {
    case IRQ_TYPE_NONE:
        break;
    case IRQ_TYPE_EDGE_RISING:
        val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
        val &= ~SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
        break;
    case IRQ_TYPE_EDGE_FALLING:
        val &= ~SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
        val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
        break;
    case IRQ_TYPE_EDGE_BOTH:
        val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_LOW_MASK |
             SIRFSOC_GPIO_CTL_INTR_TYPE_MASK;
        break;
    case IRQ_TYPE_LEVEL_LOW:
        val &= ~(SIRFSOC_GPIO_CTL_INTR_HIGH_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
        val |= SIRFSOC_GPIO_CTL_INTR_LOW_MASK;
        break;
    case IRQ_TYPE_LEVEL_HIGH:
        val |= SIRFSOC_GPIO_CTL_INTR_HIGH_MASK;
        val &= ~(SIRFSOC_GPIO_CTL_INTR_LOW_MASK | SIRFSOC_GPIO_CTL_INTR_TYPE_MASK);
        break;
    }

    writel(val, bank->chip.regs + offset);

    spin_unlock_irqrestore(&sgpio_lock, flags);

    return 0;
}

static struct irq_chip sirfsoc_irq_chip = {
    .name = "sirf-gpio-irq",
    .irq_ack = sirfsoc_gpio_irq_ack,
    .irq_mask = sirfsoc_gpio_irq_mask,
    .irq_unmask = sirfsoc_gpio_irq_unmask,
    .irq_set_type = sirfsoc_gpio_irq_type,
};

static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
{
    struct sirfsoc_gpio_bank *bank = irq_get_handler_data(irq);
    u32 status, ctrl;
    int idx = 0;
    unsigned int first_irq;
    struct irq_chip *chip = irq_get_chip(irq);

    chained_irq_enter(chip, desc);

    status = readl(bank->chip.regs + SIRFSOC_GPIO_INT_STATUS(bank->id));
    if (!status) {
        printk(KERN_WARNING
            "%s: gpio id %d status %#x no interrupt is flaged\n",
            __func__, bank->id, status);
        handle_bad_irq(irq, desc);
        return;
    }

    first_irq = bank->domain->revmap_data.legacy.first_irq;

    while (status) {
        ctrl = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, idx));

        /*
         * Here we must check whether the corresponding GPIO's interrupt
         * has been enabled, otherwise just skip it
         */
        if ((status & 0x1) && (ctrl & SIRFSOC_GPIO_CTL_INTR_EN_MASK)) {
            pr_debug("%s: gpio id %d idx %d happens\n",
                __func__, bank->id, idx);
            generic_handle_irq(first_irq + idx);
        }

        idx++;
        status = status >> 1;
    }

    chained_irq_exit(chip, desc);
}

static inline void sirfsoc_gpio_set_input(struct sirfsoc_gpio_bank *bank, unsigned ctrl_offset)
{
    u32 val;

    val = readl(bank->chip.regs + ctrl_offset);
    val &= ~SIRFSOC_GPIO_CTL_OUT_EN_MASK;
    writel(val, bank->chip.regs + ctrl_offset);
}

static int sirfsoc_gpio_request(struct gpio_chip *chip, unsigned offset)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    unsigned long flags;

    if (pinctrl_request_gpio(chip->base + offset))
        return -ENODEV;

    spin_lock_irqsave(&bank->lock, flags);

    /*
     * default status:
     * set direction as input and mask irq
     */
    sirfsoc_gpio_set_input(bank, SIRFSOC_GPIO_CTRL(bank->id, offset));
    __sirfsoc_gpio_irq_mask(bank, offset);

    spin_unlock_irqrestore(&bank->lock, flags);

    return 0;
}

static void sirfsoc_gpio_free(struct gpio_chip *chip, unsigned offset)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    unsigned long flags;

    spin_lock_irqsave(&bank->lock, flags);

    __sirfsoc_gpio_irq_mask(bank, offset);
    sirfsoc_gpio_set_input(bank, SIRFSOC_GPIO_CTRL(bank->id, offset));

    spin_unlock_irqrestore(&bank->lock, flags);

    pinctrl_free_gpio(chip->base + offset);
}

static int sirfsoc_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    int idx = sirfsoc_gpio_to_offset(gpio);
    unsigned long flags;
    unsigned offset;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&bank->lock, flags);

    sirfsoc_gpio_set_input(bank, offset);

    spin_unlock_irqrestore(&bank->lock, flags);

    return 0;
}

static inline void sirfsoc_gpio_set_output(struct sirfsoc_gpio_bank *bank, unsigned offset,
    int value)
{
    u32 out_ctrl;
    unsigned long flags;

    spin_lock_irqsave(&bank->lock, flags);

    out_ctrl = readl(bank->chip.regs + offset);
    if (value)
        out_ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
    else
        out_ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;

    out_ctrl &= ~SIRFSOC_GPIO_CTL_INTR_EN_MASK;
    out_ctrl |= SIRFSOC_GPIO_CTL_OUT_EN_MASK;
    writel(out_ctrl, bank->chip.regs + offset);

    spin_unlock_irqrestore(&bank->lock, flags);
}

static int sirfsoc_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    int idx = sirfsoc_gpio_to_offset(gpio);
    u32 offset;
    unsigned long flags;

    offset = SIRFSOC_GPIO_CTRL(bank->id, idx);

    spin_lock_irqsave(&sgpio_lock, flags);

    sirfsoc_gpio_set_output(bank, offset, value);

    spin_unlock_irqrestore(&sgpio_lock, flags);

    return 0;
}

static int sirfsoc_gpio_get_value(struct gpio_chip *chip, unsigned offset)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    u32 val;
    unsigned long flags;

    spin_lock_irqsave(&bank->lock, flags);

    val = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));

    spin_unlock_irqrestore(&bank->lock, flags);

    return !!(val & SIRFSOC_GPIO_CTL_DATAIN_MASK);
}

static void sirfsoc_gpio_set_value(struct gpio_chip *chip, unsigned offset,
    int value)
{
    struct sirfsoc_gpio_bank *bank = sirfsoc_irqchip_to_bank(chip);
    u32 ctrl;
    unsigned long flags;

    spin_lock_irqsave(&bank->lock, flags);

    ctrl = readl(bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));
    if (value)
        ctrl |= SIRFSOC_GPIO_CTL_DATAOUT_MASK;
    else
        ctrl &= ~SIRFSOC_GPIO_CTL_DATAOUT_MASK;
    writel(ctrl, bank->chip.regs + SIRFSOC_GPIO_CTRL(bank->id, offset));

    spin_unlock_irqrestore(&bank->lock, flags);
}

int sirfsoc_gpio_irq_map(struct irq_domain *d, unsigned int irq,
    irq_hw_number_t hwirq)
{
    struct sirfsoc_gpio_bank *bank = d->host_data;

    if (!bank)
        return -EINVAL;

    irq_set_chip(irq, &sirfsoc_irq_chip);
    irq_set_handler(irq, handle_level_irq);
    irq_set_chip_data(irq, bank);
    set_irq_flags(irq, IRQF_VALID);

    return 0;
}

const struct irq_domain_ops sirfsoc_gpio_irq_simple_ops = {
    .map = sirfsoc_gpio_irq_map,
    .xlate = irq_domain_xlate_twocell,
};

static int __devinit sirfsoc_gpio_probe(struct device_node *np)
{
    int i, err = 0;
    struct sirfsoc_gpio_bank *bank;
    void *regs;
    struct platform_device *pdev;

    pdev = of_find_device_by_node(np);
    if (!pdev)
        return -ENODEV;

    regs = of_iomap(np, 0);
    if (!regs)
        return -ENOMEM;

    for (i = 0; i < SIRFSOC_GPIO_NO_OF_BANKS; i++) {
        bank = &sgpio_bank[i];
        spin_lock_init(&bank->lock);
        bank->chip.gc.request = sirfsoc_gpio_request;
        bank->chip.gc.free = sirfsoc_gpio_free;
        bank->chip.gc.direction_input = sirfsoc_gpio_direction_input;
        bank->chip.gc.get = sirfsoc_gpio_get_value;
        bank->chip.gc.direction_output = sirfsoc_gpio_direction_output;
        bank->chip.gc.set = sirfsoc_gpio_set_value;
        bank->chip.gc.to_irq = sirfsoc_gpio_to_irq;
        bank->chip.gc.base = i * SIRFSOC_GPIO_BANK_SIZE;
        bank->chip.gc.ngpio = SIRFSOC_GPIO_BANK_SIZE;
        bank->chip.gc.label = kstrdup(np->full_name, GFP_KERNEL);
        bank->chip.gc.of_node = np;
        bank->chip.regs = regs;
        bank->id = i;
        bank->parent_irq = platform_get_irq(pdev, i);
        if (bank->parent_irq < 0) {
            err = bank->parent_irq;
            goto out;
        }

        err = gpiochip_add(&bank->chip.gc);
        if (err) {
            pr_err("%s: error in probe function with status %d\n",
                np->full_name, err);
            goto out;
        }

        bank->domain = irq_domain_add_legacy(np, SIRFSOC_GPIO_BANK_SIZE,
            SIRFSOC_GPIO_IRQ_START + i * SIRFSOC_GPIO_BANK_SIZE, 0,
            &sirfsoc_gpio_irq_simple_ops, bank);

        if (!bank->domain) {
            pr_err("%s: Failed to create irqdomain\n", np->full_name);
            err = -ENOSYS;
            goto out;
        }

        irq_set_chained_handler(bank->parent_irq, sirfsoc_gpio_handle_irq);
        irq_set_handler_data(bank->parent_irq, bank);
    }

    return 0;

out:
    iounmap(regs);
    return err;
}

static int __init sirfsoc_gpio_init(void)
{

    struct device_node *np;

    np = of_find_matching_node(NULL, pinmux_ids);

    if (!np)
        return -ENODEV;

    return sirfsoc_gpio_probe(np);
}
subsys_initcall(sirfsoc_gpio_init);

MODULE_AUTHOR("Rongjun Ying <[email protected]>, "
    "Yuping Luo <[email protected]>, "
    "Barry Song <[email protected]>");
MODULE_DESCRIPTION("SIRFSOC pin control driver");
MODULE_LICENSE("GPL");