/*
 * XHCI HCD glue for Cavium Octeon III SOCs.
 *
 * Copyright (C) 2010-2017 Cavium Networks
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/of_platform.h>
#include <linux/io.h>

#include <asm/octeon/octeon.h>

/* USB Control Register */
union cvm_usbdrd_uctl_ctl {
        uint64_t u64;
        struct cvm_usbdrd_uctl_ctl_s {
        /* 1 = BIST and set all USB RAMs to 0x0, 0 = BIST */
        __BITFIELD_FIELD(uint64_t clear_bist:1,
        /* 1 = Start BIST and cleared by hardware */
        __BITFIELD_FIELD(uint64_t start_bist:1,
        /* Reference clock select for SuperSpeed and HighSpeed PLLs:
         *      0x0 = Both PLLs use DLMC_REF_CLK0 for reference clock
         *      0x1 = Both PLLs use DLMC_REF_CLK1 for reference clock
         *      0x2 = SuperSpeed PLL uses DLMC_REF_CLK0 for reference clock &
         *            HighSpeed PLL uses PLL_REF_CLK for reference clck
         *      0x3 = SuperSpeed PLL uses DLMC_REF_CLK1 for reference clock &
         *            HighSpeed PLL uses PLL_REF_CLK for reference clck
         */
        __BITFIELD_FIELD(uint64_t ref_clk_sel:2,
        /* 1 = Spread-spectrum clock enable, 0 = SS clock disable */
        __BITFIELD_FIELD(uint64_t ssc_en:1,
        /* Spread-spectrum clock modulation range:
         *      0x0 = -4980 ppm downspread
         *      0x1 = -4492 ppm downspread
         *      0x2 = -4003 ppm downspread
         *      0x3 - 0x7 = Reserved
         */
        __BITFIELD_FIELD(uint64_t ssc_range:3,
        /* Enable non-standard oscillator frequencies:
         *      [55:53] = modules -1
         *      [52:47] = 2's complement push amount, 0 = Feature disabled
         */
        __BITFIELD_FIELD(uint64_t ssc_ref_clk_sel:9,
        /* Reference clock multiplier for non-standard frequencies:
         *      0x19 = 100MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
         *      0x28 = 125MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
         *      0x32 =  50MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
         *      Other Values = Reserved
         */
        __BITFIELD_FIELD(uint64_t mpll_multiplier:7,
        /* Enable reference clock to prescaler for SuperSpeed functionality.
         * Should always be set to "1"
         */
        __BITFIELD_FIELD(uint64_t ref_ssp_en:1,
        /* Divide the reference clock by 2 before entering the
         * REF_CLK_FSEL divider:
         *      If REF_CLK_SEL = 0x0 or 0x1, then only 0x0 is legal
         *      If REF_CLK_SEL = 0x2 or 0x3, then:
         *              0x1 = DLMC_REF_CLK* is 125MHz
         *              0x0 = DLMC_REF_CLK* is another supported frequency
         */
        __BITFIELD_FIELD(uint64_t ref_clk_div2:1,
        /* Select reference clock freqnuency for both PLL blocks:
         *      0x27 = REF_CLK_SEL is 0x0 or 0x1
         *      0x07 = REF_CLK_SEL is 0x2 or 0x3
         */
        __BITFIELD_FIELD(uint64_t ref_clk_fsel:6,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_31_31:1,
        /* Controller clock enable. */
        __BITFIELD_FIELD(uint64_t h_clk_en:1,
        /* Select bypass input to controller clock divider:
         *      0x0 = Use divided coprocessor clock from H_CLKDIV
         *      0x1 = Use clock from GPIO pins
         */
        __BITFIELD_FIELD(uint64_t h_clk_byp_sel:1,
        /* Reset controller clock divider. */
        __BITFIELD_FIELD(uint64_t h_clkdiv_rst:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_27_27:1,
        /* Clock divider select:
         *      0x0 = divide by 1
         *      0x1 = divide by 2
         *      0x2 = divide by 4
         *      0x3 = divide by 6
         *      0x4 = divide by 8
         *      0x5 = divide by 16
         *      0x6 = divide by 24
         *      0x7 = divide by 32
         */
        __BITFIELD_FIELD(uint64_t h_clkdiv_sel:3,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_22_23:2,
        /* USB3 port permanently attached: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t usb3_port_perm_attach:1,
        /* USB2 port permanently attached: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t usb2_port_perm_attach:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_19_19:1,
        /* Disable SuperSpeed PHY: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t usb3_port_disable:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_17_17:1,
        /* Disable HighSpeed PHY: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t usb2_port_disable:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_15_15:1,
        /* Enable PHY SuperSpeed block power: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t ss_power_en:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_13_13:1,
        /* Enable PHY HighSpeed block power: 0x0 = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t hs_power_en:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_5_11:7,
        /* Enable USB UCTL interface clock: 0xx = No, 0x1 = Yes */
        __BITFIELD_FIELD(uint64_t csclk_en:1,
        /* Controller mode: 0x0 = Host, 0x1 = Device */
        __BITFIELD_FIELD(uint64_t drd_mode:1,
        /* PHY reset */
        __BITFIELD_FIELD(uint64_t uphy_rst:1,
        /* Software reset UAHC */
        __BITFIELD_FIELD(uint64_t uahc_rst:1,
        /* Software resets UCTL */
        __BITFIELD_FIELD(uint64_t uctl_rst:1,
        ;)))))))))))))))))))))))))))))))))
        } s;
};

/* UAHC Configuration Register */
union cvm_usbdrd_uctl_host_cfg {
        uint64_t u64;
        struct cvm_usbdrd_uctl_host_cfg_s {
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_60_63:4,
        /* Indicates minimum value of all received BELT values */
        __BITFIELD_FIELD(uint64_t host_current_belt:12,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_38_47:10,
        /* HS jitter adjustment */
        __BITFIELD_FIELD(uint64_t fla:6,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_29_31:3,
        /* Bus-master enable: 0x0 = Disabled (stall DMAs), 0x1 = enabled */
        __BITFIELD_FIELD(uint64_t bme:1,
        /* Overcurrent protection enable: 0x0 = unavailable, 0x1 = available */
        __BITFIELD_FIELD(uint64_t oci_en:1,
        /* Overcurrent sene selection:
         *      0x0 = Overcurrent indication from off-chip is active-low
         *      0x1 = Overcurrent indication from off-chip is active-high
         */
        __BITFIELD_FIELD(uint64_t oci_active_high_en:1,
        /* Port power control enable: 0x0 = unavailable, 0x1 = available */
        __BITFIELD_FIELD(uint64_t ppc_en:1,
        /* Port power control sense selection:
         *      0x0 = Port power to off-chip is active-low
         *      0x1 = Port power to off-chip is active-high
         */
        __BITFIELD_FIELD(uint64_t ppc_active_high_en:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_0_23:24,
        ;)))))))))))
        } s;
};

/* UCTL Shim Features Register */
union cvm_usbdrd_uctl_shim_cfg {
        uint64_t u64;
        struct cvm_usbdrd_uctl_shim_cfg_s {
        /* Out-of-bound UAHC register access: 0 = read, 1 = write */
        __BITFIELD_FIELD(uint64_t xs_ncb_oob_wrn:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_60_62:3,
        /* SRCID error log for out-of-bound UAHC register access:
         *      [59:58] = chipID
         *      [57] = Request source: 0 = core, 1 = NCB-device
         *      [56:51] = Core/NCB-device number, [56] always 0 for NCB devices
         *      [50:48] = SubID
         */
        __BITFIELD_FIELD(uint64_t xs_ncb_oob_osrc:12,
        /* Error log for bad UAHC DMA access: 0 = Read log, 1 = Write log */
        __BITFIELD_FIELD(uint64_t xm_bad_dma_wrn:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_44_46:3,
        /* Encoded error type for bad UAHC DMA */
        __BITFIELD_FIELD(uint64_t xm_bad_dma_type:4,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_13_39:27,
        /* Select the IOI read command used by DMA accesses */
        __BITFIELD_FIELD(uint64_t dma_read_cmd:1,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_10_11:2,
        /* Select endian format for DMA accesses to the L2c:
         *      0x0 = Little endian
         *`     0x1 = Big endian
         *      0x2 = Reserved
         *      0x3 = Reserved
         */
        __BITFIELD_FIELD(uint64_t dma_endian_mode:2,
        /* Reserved */
        __BITFIELD_FIELD(uint64_t reserved_2_7:6,
        /* Select endian format for IOI CSR access to UAHC:
         *      0x0 = Little endian
         *`     0x1 = Big endian
         *      0x2 = Reserved
         *      0x3 = Reserved
         */
        __BITFIELD_FIELD(uint64_t csr_endian_mode:2,
        ;))))))))))))
        } s;
};

#define OCTEON_H_CLKDIV_SEL             8
#define OCTEON_MIN_H_CLK_RATE           150000000
#define OCTEON_MAX_H_CLK_RATE           300000000

static DEFINE_MUTEX(dwc3_octeon_clocks_mutex);
static uint8_t clk_div[OCTEON_H_CLKDIV_SEL] = {1, 2, 4, 6, 8, 16, 24, 32};


static int dwc3_octeon_config_power(struct device *dev, u64 base)
{
#define UCTL_HOST_CFG   0xe0
        union cvm_usbdrd_uctl_host_cfg uctl_host_cfg;
        union cvmx_gpio_bit_cfgx gpio_bit;
        uint32_t gpio_pwr[3];
        int gpio, len, power_active_low;
        struct device_node *node = dev->of_node;
        int index = (base >> 24) & 1;

        if (of_find_property(node, "power", &len) != NULL) {
                if (len == 12) {
                        of_property_read_u32_array(node, "power", gpio_pwr, 3);
                        power_active_low = gpio_pwr[2] & 0x01;
                        gpio = gpio_pwr[1];
                } else if (len == 8) {
                        of_property_read_u32_array(node, "power", gpio_pwr, 2);
                        power_active_low = 0;
                        gpio = gpio_pwr[1];
                } else {
                        dev_err(dev, "dwc3 controller clock init failure.\n");
                        return -EINVAL;
                }
                if ((OCTEON_IS_MODEL(OCTEON_CN73XX) ||
                    OCTEON_IS_MODEL(OCTEON_CNF75XX))
                    && gpio <= 31) {
                        gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio));
                        gpio_bit.s.tx_oe = 1;
                        gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x15);
                        cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64);
                } else if (gpio <= 15) {
                        gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio));
                        gpio_bit.s.tx_oe = 1;
                        gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x19);
                        cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64);
                } else {
                        gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_XBIT_CFGX(gpio));
                        gpio_bit.s.tx_oe = 1;
                        gpio_bit.s.output_sel = (index == 0 ? 0x14 : 0x19);
                        cvmx_write_csr(CVMX_GPIO_XBIT_CFGX(gpio), gpio_bit.u64);
                }

                /* Enable XHCI power control and set if active high or low. */
                uctl_host_cfg.u64 = cvmx_read_csr(base + UCTL_HOST_CFG);
                uctl_host_cfg.s.ppc_en = 1;
                uctl_host_cfg.s.ppc_active_high_en = !power_active_low;
                cvmx_write_csr(base + UCTL_HOST_CFG, uctl_host_cfg.u64);
        } else {
                /* Disable XHCI power control and set if active high. */
                uctl_host_cfg.u64 = cvmx_read_csr(base + UCTL_HOST_CFG);
                uctl_host_cfg.s.ppc_en = 0;
                uctl_host_cfg.s.ppc_active_high_en = 0;
                cvmx_write_csr(base + UCTL_HOST_CFG, uctl_host_cfg.u64);
                dev_warn(dev, "dwc3 controller clock init failure.\n");
        }
        return 0;
}

static int dwc3_octeon_clocks_start(struct device *dev, u64 base)
{
        union cvm_usbdrd_uctl_ctl uctl_ctl;
        int ref_clk_sel = 2;
        u64 div;
        u32 clock_rate;
        int mpll_mul;
        int i;
        u64 h_clk_rate;
        u64 uctl_ctl_reg = base;

        if (dev->of_node) {
                const char *ss_clock_type;
                const char *hs_clock_type;

                i = of_property_read_u32(dev->of_node,
                                         "refclk-frequency", &clock_rate);
                if (i) {
                        pr_err("No UCTL \"refclk-frequency\"\n");
                        return -EINVAL;
                }
                i = of_property_read_string(dev->of_node,
                                            "refclk-type-ss", &ss_clock_type);
                if (i) {
                        pr_err("No UCTL \"refclk-type-ss\"\n");
                        return -EINVAL;
                }
                i = of_property_read_string(dev->of_node,
                                            "refclk-type-hs", &hs_clock_type);
                if (i) {
                        pr_err("No UCTL \"refclk-type-hs\"\n");
                        return -EINVAL;
                }
                if (strcmp("dlmc_ref_clk0", ss_clock_type) == 0) {
                        if (strcmp(hs_clock_type, "dlmc_ref_clk0") == 0)
                                ref_clk_sel = 0;
                        else if (strcmp(hs_clock_type, "pll_ref_clk") == 0)
                                ref_clk_sel = 2;
                        else
                                pr_err("Invalid HS clock type %s, using  pll_ref_clk instead\n",
                                       hs_clock_type);
                } else if (strcmp(ss_clock_type, "dlmc_ref_clk1") == 0) {
                        if (strcmp(hs_clock_type, "dlmc_ref_clk1") == 0)
                                ref_clk_sel = 1;
                        else if (strcmp(hs_clock_type, "pll_ref_clk") == 0)
                                ref_clk_sel = 3;
                        else {
                                pr_err("Invalid HS clock type %s, using  pll_ref_clk instead\n",
                                       hs_clock_type);
                                ref_clk_sel = 3;
                        }
                } else
                        pr_err("Invalid SS clock type %s, using  dlmc_ref_clk0 instead\n",
                               ss_clock_type);

                if ((ref_clk_sel == 0 || ref_clk_sel == 1) &&
                                  (clock_rate != 100000000))
                        pr_err("Invalid UCTL clock rate of %u, using 100000000 instead\n",
                               clock_rate);

        } else {
                pr_err("No USB UCTL device node\n");
                return -EINVAL;
        }

        /*
         * Step 1: Wait for all voltages to be stable...that surely
         *         happened before starting the kernel. SKIP
         */

        /* Step 2: Select GPIO for overcurrent indication, if desired. SKIP */

        /* Step 3: Assert all resets. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.uphy_rst = 1;
        uctl_ctl.s.uahc_rst = 1;
        uctl_ctl.s.uctl_rst = 1;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 4a: Reset the clock dividers. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.h_clkdiv_rst = 1;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 4b: Select controller clock frequency. */
        for (div = 0; div < OCTEON_H_CLKDIV_SEL; div++) {
                h_clk_rate = octeon_get_io_clock_rate() / clk_div[div];
                if (h_clk_rate <= OCTEON_MAX_H_CLK_RATE &&
                                 h_clk_rate >= OCTEON_MIN_H_CLK_RATE)
                        break;
        }
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.h_clkdiv_sel = div;
        uctl_ctl.s.h_clk_en = 1;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        if ((div != uctl_ctl.s.h_clkdiv_sel) || (!uctl_ctl.s.h_clk_en)) {
                dev_err(dev, "dwc3 controller clock init failure.\n");
                        return -EINVAL;
        }

        /* Step 4c: Deassert the controller clock divider reset. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.h_clkdiv_rst = 0;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 5a: Reference clock configuration. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.ref_clk_sel = ref_clk_sel;
        uctl_ctl.s.ref_clk_fsel = 0x07;
        uctl_ctl.s.ref_clk_div2 = 0;
        switch (clock_rate) {
        default:
                dev_err(dev, "Invalid ref_clk %u, using 100000000 instead\n",
                        clock_rate);
        case 100000000:
                mpll_mul = 0x19;
                if (ref_clk_sel < 2)
                        uctl_ctl.s.ref_clk_fsel = 0x27;
                break;
        case 50000000:
                mpll_mul = 0x32;
                break;
        case 125000000:
                mpll_mul = 0x28;
                break;
        }
        uctl_ctl.s.mpll_multiplier = mpll_mul;

        /* Step 5b: Configure and enable spread-spectrum for SuperSpeed. */
        uctl_ctl.s.ssc_en = 1;

        /* Step 5c: Enable SuperSpeed. */
        uctl_ctl.s.ref_ssp_en = 1;

        /* Step 5d: Cofngiure PHYs. SKIP */

        /* Step 6a & 6b: Power up PHYs. */
        uctl_ctl.s.hs_power_en = 1;
        uctl_ctl.s.ss_power_en = 1;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 7: Wait 10 controller-clock cycles to take effect. */
        udelay(10);

        /* Step 8a: Deassert UCTL reset signal. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.uctl_rst = 0;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 8b: Wait 10 controller-clock cycles. */
        udelay(10);

        /* Steo 8c: Setup power-power control. */
        if (dwc3_octeon_config_power(dev, base)) {
                dev_err(dev, "Error configuring power.\n");
                return -EINVAL;
        }

        /* Step 8d: Deassert UAHC reset signal. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.uahc_rst = 0;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /* Step 8e: Wait 10 controller-clock cycles. */
        udelay(10);

        /* Step 9: Enable conditional coprocessor clock of UCTL. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.csclk_en = 1;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        /*Step 10: Set for host mode only. */
        uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
        uctl_ctl.s.drd_mode = 0;
        cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);

        return 0;
}

static void __init dwc3_octeon_set_endian_mode(u64 base)
{
#define UCTL_SHIM_CFG   0xe8
        union cvm_usbdrd_uctl_shim_cfg shim_cfg;

        shim_cfg.u64 = cvmx_read_csr(base + UCTL_SHIM_CFG);
#ifdef __BIG_ENDIAN
        shim_cfg.s.dma_endian_mode = 1;
        shim_cfg.s.csr_endian_mode = 1;
#else
        shim_cfg.s.dma_endian_mode = 0;
        shim_cfg.s.csr_endian_mode = 0;
#endif
        cvmx_write_csr(base + UCTL_SHIM_CFG, shim_cfg.u64);
}

#define CVMX_USBDRDX_UCTL_CTL(index)                            \
                (CVMX_ADD_IO_SEG(0x0001180068000000ull) +       \
                ((index & 1) * 0x1000000ull))
static void __init dwc3_octeon_phy_reset(u64 base)
{
        union cvm_usbdrd_uctl_ctl uctl_ctl;
        int index = (base >> 24) & 1;

        uctl_ctl.u64 = cvmx_read_csr(CVMX_USBDRDX_UCTL_CTL(index));
        uctl_ctl.s.uphy_rst = 0;
        cvmx_write_csr(CVMX_USBDRDX_UCTL_CTL(index), uctl_ctl.u64);
}

static int __init dwc3_octeon_device_init(void)
{
        const char compat_node_name[] = "cavium,octeon-7130-usb-uctl";
        struct platform_device *pdev;
        struct device_node *node;
        struct resource *res;
        void __iomem *base;

        /*
         * There should only be three universal controllers, "uctl"
         * in the device tree. Two USB and a SATA, which we ignore.
         */
        node = NULL;
        do {
                node = of_find_node_by_name(node, "uctl");
                if (!node)
                        return -ENODEV;

                if (of_device_is_compatible(node, compat_node_name)) {
                        pdev = of_find_device_by_node(node);
                        if (!pdev)
                                return -ENODEV;

                        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
                        if (res == NULL) {
                                dev_err(&pdev->dev, "No memory resources\n");
                                return -ENXIO;
                        }

                        /*
                         * The code below maps in the registers necessary for
                         * setting up the clocks and reseting PHYs. We must
                         * release the resources so the dwc3 subsystem doesn't
                         * know the difference.
                         */
                        base = devm_ioremap_resource(&pdev->dev, res);
                        if (IS_ERR(base))
                                return PTR_ERR(base);

                        mutex_lock(&dwc3_octeon_clocks_mutex);
                        dwc3_octeon_clocks_start(&pdev->dev, (u64)base);
                        dwc3_octeon_set_endian_mode((u64)base);
                        dwc3_octeon_phy_reset((u64)base);
                        dev_info(&pdev->dev, "clocks initialized.\n");
                        mutex_unlock(&dwc3_octeon_clocks_mutex);
                        devm_iounmap(&pdev->dev, base);
                        devm_release_mem_region(&pdev->dev, res->start,
                                                resource_size(res));
                }
        } while (node != NULL);

        return 0;
}
device_initcall(dwc3_octeon_device_init);

MODULE_AUTHOR("David Daney <david.daney@cavium.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("USB driver for OCTEON III SoC");