123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507 |
- /*
- * Copyright (C) 2016 Socionext Inc.
- * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/mfd/syscon.h>
- #include <linux/module.h>
- #include <linux/of.h>
- #include <linux/of_device.h>
- #include <linux/platform_device.h>
- #include <linux/regmap.h>
- #include <linux/reset-controller.h>
- struct uniphier_reset_data {
- unsigned int id;
- unsigned int reg;
- unsigned int bit;
- unsigned int flags;
- #define UNIPHIER_RESET_ACTIVE_LOW BIT(0)
- };
- #define UNIPHIER_RESET_ID_END (unsigned int)(-1)
- #define UNIPHIER_RESET_END \
- { .id = UNIPHIER_RESET_ID_END }
- #define UNIPHIER_RESET(_id, _reg, _bit) \
- { \
- .id = (_id), \
- .reg = (_reg), \
- .bit = (_bit), \
- }
- #define UNIPHIER_RESETX(_id, _reg, _bit) \
- { \
- .id = (_id), \
- .reg = (_reg), \
- .bit = (_bit), \
- .flags = UNIPHIER_RESET_ACTIVE_LOW, \
- }
- /* System reset data */
- static const struct uniphier_reset_data uniphier_ld4_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
- UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (Ether, HSC, MIO) */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
- UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */
- UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, MIO, RLE) */
- UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (Ether, SATA, USB3) */
- UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
- UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
- UNIPHIER_RESETX(28, 0x2000, 18), /* SATA0 */
- UNIPHIER_RESETX(29, 0x2004, 18), /* SATA1 */
- UNIPHIER_RESETX(30, 0x2000, 19), /* SATA-PHY */
- UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
- UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC) */
- UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (PCIe, USB3) */
- UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
- UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
- UNIPHIER_RESETX(24, 0x2008, 2), /* PCIe */
- UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
- UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */
- UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, RLE) */
- UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
- UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
- UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */
- UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */
- UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */
- UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */
- UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */
- UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */
- UNIPHIER_RESET(30, 0x2014, 8), /* SATA-PHY (active high) */
- UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
- UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
- UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */
- UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC, MIO) */
- UNIPHIER_RESETX(9, 0x200c, 9), /* HSC */
- UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */
- UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */
- UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
- UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
- UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */
- UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC) */
- UNIPHIER_RESETX(9, 0x200c, 9), /* HSC */
- UNIPHIER_RESETX(14, 0x200c, 5), /* USB30 */
- UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */
- UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */
- UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */
- UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */
- UNIPHIER_RESETX(24, 0x200c, 4), /* PCIe */
- UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */
- UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */
- UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pxs3_sys_reset_data[] = {
- UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
- UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
- UNIPHIER_RESETX(6, 0x200c, 9), /* Ether0 */
- UNIPHIER_RESETX(7, 0x200c, 10), /* Ether1 */
- UNIPHIER_RESETX(8, 0x200c, 12), /* STDMAC */
- UNIPHIER_RESETX(12, 0x200c, 4), /* USB30 link */
- UNIPHIER_RESETX(13, 0x200c, 5), /* USB31 link */
- UNIPHIER_RESETX(16, 0x200c, 16), /* USB30-PHY0 */
- UNIPHIER_RESETX(17, 0x200c, 18), /* USB30-PHY1 */
- UNIPHIER_RESETX(18, 0x200c, 20), /* USB30-PHY2 */
- UNIPHIER_RESETX(20, 0x200c, 17), /* USB31-PHY0 */
- UNIPHIER_RESETX(21, 0x200c, 19), /* USB31-PHY1 */
- UNIPHIER_RESETX(24, 0x200c, 3), /* PCIe */
- UNIPHIER_RESETX(28, 0x200c, 7), /* SATA0 */
- UNIPHIER_RESETX(29, 0x200c, 8), /* SATA1 */
- UNIPHIER_RESETX(30, 0x200c, 21), /* SATA-PHY */
- UNIPHIER_RESET_END,
- };
- /* Media I/O reset data */
- #define UNIPHIER_MIO_RESET_SD(id, ch) \
- UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0)
- #define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \
- UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26)
- #define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \
- UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0)
- #define UNIPHIER_MIO_RESET_USB2(id, ch) \
- UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0)
- #define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \
- UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24)
- #define UNIPHIER_MIO_RESET_DMAC(id) \
- UNIPHIER_RESETX((id), 0x110, 17)
- static const struct uniphier_reset_data uniphier_ld4_mio_reset_data[] = {
- UNIPHIER_MIO_RESET_SD(0, 0),
- UNIPHIER_MIO_RESET_SD(1, 1),
- UNIPHIER_MIO_RESET_SD(2, 2),
- UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0),
- UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1),
- UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2),
- UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
- UNIPHIER_MIO_RESET_DMAC(7),
- UNIPHIER_MIO_RESET_USB2(8, 0),
- UNIPHIER_MIO_RESET_USB2(9, 1),
- UNIPHIER_MIO_RESET_USB2(10, 2),
- UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0),
- UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1),
- UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2),
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pro5_sd_reset_data[] = {
- UNIPHIER_MIO_RESET_SD(0, 0),
- UNIPHIER_MIO_RESET_SD(1, 1),
- UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
- UNIPHIER_RESET_END,
- };
- /* Peripheral reset data */
- #define UNIPHIER_PERI_RESET_UART(id, ch) \
- UNIPHIER_RESETX((id), 0x114, 19 + (ch))
- #define UNIPHIER_PERI_RESET_I2C(id, ch) \
- UNIPHIER_RESETX((id), 0x114, 5 + (ch))
- #define UNIPHIER_PERI_RESET_FI2C(id, ch) \
- UNIPHIER_RESETX((id), 0x114, 24 + (ch))
- #define UNIPHIER_PERI_RESET_SCSSI(id, ch) \
- UNIPHIER_RESETX((id), 0x110, 17 + (ch))
- #define UNIPHIER_PERI_RESET_MCSSI(id) \
- UNIPHIER_RESETX((id), 0x114, 14)
- static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = {
- UNIPHIER_PERI_RESET_UART(0, 0),
- UNIPHIER_PERI_RESET_UART(1, 1),
- UNIPHIER_PERI_RESET_UART(2, 2),
- UNIPHIER_PERI_RESET_UART(3, 3),
- UNIPHIER_PERI_RESET_I2C(4, 0),
- UNIPHIER_PERI_RESET_I2C(5, 1),
- UNIPHIER_PERI_RESET_I2C(6, 2),
- UNIPHIER_PERI_RESET_I2C(7, 3),
- UNIPHIER_PERI_RESET_I2C(8, 4),
- UNIPHIER_PERI_RESET_SCSSI(11, 0),
- UNIPHIER_RESET_END,
- };
- static const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = {
- UNIPHIER_PERI_RESET_UART(0, 0),
- UNIPHIER_PERI_RESET_UART(1, 1),
- UNIPHIER_PERI_RESET_UART(2, 2),
- UNIPHIER_PERI_RESET_UART(3, 3),
- UNIPHIER_PERI_RESET_FI2C(4, 0),
- UNIPHIER_PERI_RESET_FI2C(5, 1),
- UNIPHIER_PERI_RESET_FI2C(6, 2),
- UNIPHIER_PERI_RESET_FI2C(7, 3),
- UNIPHIER_PERI_RESET_FI2C(8, 4),
- UNIPHIER_PERI_RESET_FI2C(9, 5),
- UNIPHIER_PERI_RESET_FI2C(10, 6),
- UNIPHIER_PERI_RESET_SCSSI(11, 0),
- UNIPHIER_PERI_RESET_SCSSI(12, 1),
- UNIPHIER_PERI_RESET_SCSSI(13, 2),
- UNIPHIER_PERI_RESET_SCSSI(14, 3),
- UNIPHIER_PERI_RESET_MCSSI(15),
- UNIPHIER_RESET_END,
- };
- /* Analog signal amplifiers reset data */
- static const struct uniphier_reset_data uniphier_ld11_adamv_reset_data[] = {
- UNIPHIER_RESETX(0, 0x10, 6), /* EVEA */
- UNIPHIER_RESET_END,
- };
- /* core implementaton */
- struct uniphier_reset_priv {
- struct reset_controller_dev rcdev;
- struct device *dev;
- struct regmap *regmap;
- const struct uniphier_reset_data *data;
- };
- #define to_uniphier_reset_priv(_rcdev) \
- container_of(_rcdev, struct uniphier_reset_priv, rcdev)
- static int uniphier_reset_update(struct reset_controller_dev *rcdev,
- unsigned long id, int assert)
- {
- struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev);
- const struct uniphier_reset_data *p;
- for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
- unsigned int mask, val;
- if (p->id != id)
- continue;
- mask = BIT(p->bit);
- if (assert)
- val = mask;
- else
- val = ~mask;
- if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
- val = ~val;
- return regmap_write_bits(priv->regmap, p->reg, mask, val);
- }
- dev_err(priv->dev, "reset_id=%lu was not handled\n", id);
- return -EINVAL;
- }
- static int uniphier_reset_assert(struct reset_controller_dev *rcdev,
- unsigned long id)
- {
- return uniphier_reset_update(rcdev, id, 1);
- }
- static int uniphier_reset_deassert(struct reset_controller_dev *rcdev,
- unsigned long id)
- {
- return uniphier_reset_update(rcdev, id, 0);
- }
- static int uniphier_reset_status(struct reset_controller_dev *rcdev,
- unsigned long id)
- {
- struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev);
- const struct uniphier_reset_data *p;
- for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
- unsigned int val;
- int ret, asserted;
- if (p->id != id)
- continue;
- ret = regmap_read(priv->regmap, p->reg, &val);
- if (ret)
- return ret;
- asserted = !!(val & BIT(p->bit));
- if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
- asserted = !asserted;
- return asserted;
- }
- dev_err(priv->dev, "reset_id=%lu was not found\n", id);
- return -EINVAL;
- }
- static const struct reset_control_ops uniphier_reset_ops = {
- .assert = uniphier_reset_assert,
- .deassert = uniphier_reset_deassert,
- .status = uniphier_reset_status,
- };
- static int uniphier_reset_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct uniphier_reset_priv *priv;
- const struct uniphier_reset_data *p, *data;
- struct regmap *regmap;
- struct device_node *parent;
- unsigned int nr_resets = 0;
- data = of_device_get_match_data(dev);
- if (WARN_ON(!data))
- return -EINVAL;
- parent = of_get_parent(dev->of_node); /* parent should be syscon node */
- regmap = syscon_node_to_regmap(parent);
- of_node_put(parent);
- if (IS_ERR(regmap)) {
- dev_err(dev, "failed to get regmap (error %ld)\n",
- PTR_ERR(regmap));
- return PTR_ERR(regmap);
- }
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- for (p = data; p->id != UNIPHIER_RESET_ID_END; p++)
- nr_resets = max(nr_resets, p->id + 1);
- priv->rcdev.ops = &uniphier_reset_ops;
- priv->rcdev.owner = dev->driver->owner;
- priv->rcdev.of_node = dev->of_node;
- priv->rcdev.nr_resets = nr_resets;
- priv->dev = dev;
- priv->regmap = regmap;
- priv->data = data;
- return devm_reset_controller_register(&pdev->dev, &priv->rcdev);
- }
- static const struct of_device_id uniphier_reset_match[] = {
- /* System reset */
- {
- .compatible = "socionext,uniphier-ld4-reset",
- .data = uniphier_ld4_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro4-reset",
- .data = uniphier_pro4_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-sld8-reset",
- .data = uniphier_ld4_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro5-reset",
- .data = uniphier_pro5_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs2-reset",
- .data = uniphier_pxs2_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld11-reset",
- .data = uniphier_ld11_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld20-reset",
- .data = uniphier_ld20_sys_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs3-reset",
- .data = uniphier_pxs3_sys_reset_data,
- },
- /* Media I/O reset, SD reset */
- {
- .compatible = "socionext,uniphier-ld4-mio-reset",
- .data = uniphier_ld4_mio_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro4-mio-reset",
- .data = uniphier_ld4_mio_reset_data,
- },
- {
- .compatible = "socionext,uniphier-sld8-mio-reset",
- .data = uniphier_ld4_mio_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro5-sd-reset",
- .data = uniphier_pro5_sd_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs2-sd-reset",
- .data = uniphier_pro5_sd_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld11-mio-reset",
- .data = uniphier_ld4_mio_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld11-sd-reset",
- .data = uniphier_pro5_sd_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld20-sd-reset",
- .data = uniphier_pro5_sd_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs3-sd-reset",
- .data = uniphier_pro5_sd_reset_data,
- },
- /* Peripheral reset */
- {
- .compatible = "socionext,uniphier-ld4-peri-reset",
- .data = uniphier_ld4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro4-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-sld8-peri-reset",
- .data = uniphier_ld4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pro5-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs2-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld11-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld20-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- {
- .compatible = "socionext,uniphier-pxs3-peri-reset",
- .data = uniphier_pro4_peri_reset_data,
- },
- /* Analog signal amplifiers reset */
- {
- .compatible = "socionext,uniphier-ld11-adamv-reset",
- .data = uniphier_ld11_adamv_reset_data,
- },
- {
- .compatible = "socionext,uniphier-ld20-adamv-reset",
- .data = uniphier_ld11_adamv_reset_data,
- },
- { /* sentinel */ }
- };
- MODULE_DEVICE_TABLE(of, uniphier_reset_match);
- static struct platform_driver uniphier_reset_driver = {
- .probe = uniphier_reset_probe,
- .driver = {
- .name = "uniphier-reset",
- .of_match_table = uniphier_reset_match,
- },
- };
- module_platform_driver(uniphier_reset_driver);
- MODULE_AUTHOR("Masahiro Yamada <yamada.masahiro@socionext.com>");
- MODULE_DESCRIPTION("UniPhier Reset Controller Driver");
- MODULE_LICENSE("GPL");
|