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https://github.com/AsahiLinux/u-boot
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374 lines
10 KiB
C
374 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <reset-uclass.h>
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#include <linux/bitops.h>
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#include <linux/io.h>
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#include <linux/sizes.h>
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struct uniphier_reset_data {
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unsigned int id;
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unsigned int reg;
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unsigned int bit;
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unsigned int flags;
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#define UNIPHIER_RESET_ACTIVE_LOW BIT(0)
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};
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#define UNIPHIER_RESET_ID_END (unsigned int)(-1)
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#define UNIPHIER_RESET_END \
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{ .id = UNIPHIER_RESET_ID_END }
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#define UNIPHIER_RESET(_id, _reg, _bit) \
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{ \
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.id = (_id), \
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.reg = (_reg), \
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.bit = (_bit), \
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}
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#define UNIPHIER_RESETX(_id, _reg, _bit) \
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{ \
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.id = (_id), \
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.reg = (_reg), \
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.bit = (_bit), \
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.flags = UNIPHIER_RESET_ACTIVE_LOW, \
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}
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/* System reset data */
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static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
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UNIPHIER_RESETX(6, 0x2000, 12), /* ETHER */
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC */
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UNIPHIER_RESETX(12, 0x2000, 6), /* GIO */
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UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
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UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
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UNIPHIER_RESET_END,
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};
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static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */
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UNIPHIER_RESETX(6, 0x2000, 12), /* ETHER */
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC */
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UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */
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UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */
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UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */
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UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */
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UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */
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UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */
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UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */
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UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */
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UNIPHIER_RESET(29, 0x2014, 8), /* SATA-PHY (active high) */
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UNIPHIER_RESET_END,
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};
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static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = {
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UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
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UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
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UNIPHIER_RESETX(6, 0x200c, 6), /* ETHER */
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UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC */
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UNIPHIER_RESETX(14, 0x200c, 5), /* USB30 */
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UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */
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UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */
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UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */
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UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */
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UNIPHIER_RESET_END,
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};
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static const struct uniphier_reset_data uniphier_pxs3_sys_reset_data[] = {
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UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */
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UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */
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UNIPHIER_RESETX(6, 0x200c, 9), /* ETHER0 */
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UNIPHIER_RESETX(7, 0x200c, 10), /* ETHER1 */
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UNIPHIER_RESETX(8, 0x200c, 12), /* STDMAC */
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UNIPHIER_RESETX(12, 0x200c, 4), /* USB30 link */
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UNIPHIER_RESETX(13, 0x200c, 5), /* USB31 link */
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UNIPHIER_RESETX(16, 0x200c, 16), /* USB30-PHY0 */
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UNIPHIER_RESETX(17, 0x200c, 18), /* USB30-PHY1 */
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UNIPHIER_RESETX(18, 0x200c, 20), /* USB30-PHY2 */
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UNIPHIER_RESETX(20, 0x200c, 17), /* USB31-PHY0 */
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UNIPHIER_RESETX(21, 0x200c, 19), /* USB31-PHY1 */
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UNIPHIER_RESET_END,
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};
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/* Media I/O reset data */
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#define UNIPHIER_MIO_RESET_SD(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26)
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#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \
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UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_USB2(id, ch) \
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UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0)
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#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24)
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#define UNIPHIER_MIO_RESET_DMAC(id) \
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UNIPHIER_RESETX((id), 0x110, 17)
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static const struct uniphier_reset_data uniphier_mio_reset_data[] = {
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UNIPHIER_MIO_RESET_SD(0, 0),
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UNIPHIER_MIO_RESET_SD(1, 1),
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UNIPHIER_MIO_RESET_SD(2, 2),
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UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0),
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UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1),
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UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2),
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UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1),
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UNIPHIER_MIO_RESET_DMAC(7),
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UNIPHIER_MIO_RESET_USB2(8, 0),
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UNIPHIER_MIO_RESET_USB2(9, 1),
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UNIPHIER_MIO_RESET_USB2(10, 2),
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UNIPHIER_MIO_RESET_USB2(11, 3),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2),
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UNIPHIER_MIO_RESET_USB2_BRIDGE(15, 3),
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UNIPHIER_RESET_END,
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};
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/* Peripheral reset data */
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#define UNIPHIER_PERI_RESET_UART(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 19 + (ch))
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#define UNIPHIER_PERI_RESET_I2C(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 5 + (ch))
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#define UNIPHIER_PERI_RESET_FI2C(id, ch) \
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UNIPHIER_RESETX((id), 0x114, 24 + (ch))
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static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = {
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UNIPHIER_PERI_RESET_UART(0, 0),
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UNIPHIER_PERI_RESET_UART(1, 1),
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UNIPHIER_PERI_RESET_UART(2, 2),
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UNIPHIER_PERI_RESET_UART(3, 3),
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UNIPHIER_PERI_RESET_I2C(4, 0),
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UNIPHIER_PERI_RESET_I2C(5, 1),
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UNIPHIER_PERI_RESET_I2C(6, 2),
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UNIPHIER_PERI_RESET_I2C(7, 3),
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UNIPHIER_PERI_RESET_I2C(8, 4),
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UNIPHIER_RESET_END,
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};
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static const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = {
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UNIPHIER_PERI_RESET_UART(0, 0),
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UNIPHIER_PERI_RESET_UART(1, 1),
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UNIPHIER_PERI_RESET_UART(2, 2),
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UNIPHIER_PERI_RESET_UART(3, 3),
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UNIPHIER_PERI_RESET_FI2C(4, 0),
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UNIPHIER_PERI_RESET_FI2C(5, 1),
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UNIPHIER_PERI_RESET_FI2C(6, 2),
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UNIPHIER_PERI_RESET_FI2C(7, 3),
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UNIPHIER_PERI_RESET_FI2C(8, 4),
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UNIPHIER_PERI_RESET_FI2C(9, 5),
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UNIPHIER_PERI_RESET_FI2C(10, 6),
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UNIPHIER_RESET_END,
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};
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/* core implementaton */
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struct uniphier_reset_priv {
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void __iomem *base;
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const struct uniphier_reset_data *data;
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};
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static int uniphier_reset_request(struct reset_ctl *reset_ctl)
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{
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return 0;
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}
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static int uniphier_reset_free(struct reset_ctl *reset_ctl)
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{
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return 0;
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}
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static int uniphier_reset_update(struct reset_ctl *reset_ctl, int assert)
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{
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struct uniphier_reset_priv *priv = dev_get_priv(reset_ctl->dev);
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unsigned long id = reset_ctl->id;
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const struct uniphier_reset_data *p;
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for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) {
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u32 mask, val;
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if (p->id != id)
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continue;
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val = readl(priv->base + p->reg);
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if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
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assert = !assert;
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mask = BIT(p->bit);
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if (assert)
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val |= mask;
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else
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val &= ~mask;
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writel(val, priv->base + p->reg);
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return 0;
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}
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dev_err(reset_ctl->dev, "reset_id=%lu was not handled\n", id);
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return -EINVAL;
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}
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static int uniphier_reset_assert(struct reset_ctl *reset_ctl)
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{
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return uniphier_reset_update(reset_ctl, 1);
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}
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static int uniphier_reset_deassert(struct reset_ctl *reset_ctl)
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{
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return uniphier_reset_update(reset_ctl, 0);
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}
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static const struct reset_ops uniphier_reset_ops = {
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.request = uniphier_reset_request,
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.free = uniphier_reset_free,
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.rst_assert = uniphier_reset_assert,
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.rst_deassert = uniphier_reset_deassert,
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};
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static int uniphier_reset_probe(struct udevice *dev)
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{
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struct uniphier_reset_priv *priv = dev_get_priv(dev);
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fdt_addr_t addr;
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addr = devfdt_get_addr(dev->parent);
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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priv->base = devm_ioremap(dev, addr, SZ_4K);
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if (!priv->base)
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return -ENOMEM;
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priv->data = (void *)dev_get_driver_data(dev);
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return 0;
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}
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static const struct udevice_id uniphier_reset_match[] = {
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/* System reset */
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{
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.compatible = "socionext,uniphier-ld4-reset",
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.data = (ulong)uniphier_pro4_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro4-reset",
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.data = (ulong)uniphier_pro4_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-sld8-reset",
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.data = (ulong)uniphier_pro4_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro5-reset",
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.data = (ulong)uniphier_pro4_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs2-reset",
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.data = (ulong)uniphier_pxs2_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld11-reset",
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.data = (ulong)uniphier_ld20_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld20-reset",
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.data = (ulong)uniphier_ld20_sys_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs3-reset",
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.data = (ulong)uniphier_pxs3_sys_reset_data,
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},
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/* Media I/O reset */
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{
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.compatible = "socionext,uniphier-ld4-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro4-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-sld8-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro5-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs2-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld11-mio-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld11-sd-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld20-sd-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs3-sd-reset",
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.data = (ulong)uniphier_mio_reset_data,
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},
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/* Peripheral reset */
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{
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.compatible = "socionext,uniphier-ld4-peri-reset",
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.data = (ulong)uniphier_ld4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro4-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-sld8-peri-reset",
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.data = (ulong)uniphier_ld4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pro5-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs2-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld11-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-ld20-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{
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.compatible = "socionext,uniphier-pxs3-peri-reset",
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.data = (ulong)uniphier_pro4_peri_reset_data,
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},
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(uniphier_reset) = {
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.name = "uniphier-reset",
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.id = UCLASS_RESET,
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.of_match = uniphier_reset_match,
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.probe = uniphier_reset_probe,
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.priv_auto_alloc_size = sizeof(struct uniphier_reset_priv),
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.ops = &uniphier_reset_ops,
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};
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