1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2017, Impinj, Inc.
11 #include <dt-bindings/reset/imx7-reset.h>
12 #include <dt-bindings/reset/imx8mq-reset.h>
13 #include <reset-uclass.h>
14 #include <linux/delay.h>
16 struct imx7_reset_priv {
21 struct imx7_src_signal {
22 unsigned int offset, bit;
25 enum imx7_src_registers {
29 SRC_HSICPHY_RCR = 0x001c,
30 SRC_USBOPHY1_RCR = 0x0020,
31 SRC_USBOPHY2_RCR = 0x0024,
32 SRC_MIPIPHY_RCR = 0x0028,
33 SRC_PCIEPHY_RCR = 0x002c,
34 SRC_DDRC_RCR = 0x1000,
37 static const struct imx7_src_signal imx7_src_signals[IMX7_RESET_NUM] = {
38 [IMX7_RESET_A7_CORE_POR_RESET0] = { SRC_A7RCR0, BIT(0) },
39 [IMX7_RESET_A7_CORE_POR_RESET1] = { SRC_A7RCR0, BIT(1) },
40 [IMX7_RESET_A7_CORE_RESET0] = { SRC_A7RCR0, BIT(4) },
41 [IMX7_RESET_A7_CORE_RESET1] = { SRC_A7RCR0, BIT(5) },
42 [IMX7_RESET_A7_DBG_RESET0] = { SRC_A7RCR0, BIT(8) },
43 [IMX7_RESET_A7_DBG_RESET1] = { SRC_A7RCR0, BIT(9) },
44 [IMX7_RESET_A7_ETM_RESET0] = { SRC_A7RCR0, BIT(12) },
45 [IMX7_RESET_A7_ETM_RESET1] = { SRC_A7RCR0, BIT(13) },
46 [IMX7_RESET_A7_SOC_DBG_RESET] = { SRC_A7RCR0, BIT(20) },
47 [IMX7_RESET_A7_L2RESET] = { SRC_A7RCR0, BIT(21) },
48 [IMX7_RESET_SW_M4C_RST] = { SRC_M4RCR, BIT(1) },
49 [IMX7_RESET_SW_M4P_RST] = { SRC_M4RCR, BIT(2) },
50 [IMX7_RESET_EIM_RST] = { SRC_ERCR, BIT(0) },
51 [IMX7_RESET_HSICPHY_PORT_RST] = { SRC_HSICPHY_RCR, BIT(1) },
52 [IMX7_RESET_USBPHY1_POR] = { SRC_USBOPHY1_RCR, BIT(0) },
53 [IMX7_RESET_USBPHY1_PORT_RST] = { SRC_USBOPHY1_RCR, BIT(1) },
54 [IMX7_RESET_USBPHY2_POR] = { SRC_USBOPHY2_RCR, BIT(0) },
55 [IMX7_RESET_USBPHY2_PORT_RST] = { SRC_USBOPHY2_RCR, BIT(1) },
56 [IMX7_RESET_MIPI_PHY_MRST] = { SRC_MIPIPHY_RCR, BIT(1) },
57 [IMX7_RESET_MIPI_PHY_SRST] = { SRC_MIPIPHY_RCR, BIT(2) },
58 [IMX7_RESET_PCIEPHY] = { SRC_PCIEPHY_RCR, BIT(2) | BIT(1) },
59 [IMX7_RESET_PCIEPHY_PERST] = { SRC_PCIEPHY_RCR, BIT(3) },
60 [IMX7_RESET_PCIE_CTRL_APPS_EN] = { SRC_PCIEPHY_RCR, BIT(6) },
61 [IMX7_RESET_PCIE_CTRL_APPS_TURNOFF] = { SRC_PCIEPHY_RCR, BIT(11) },
62 [IMX7_RESET_DDRC_PRST] = { SRC_DDRC_RCR, BIT(0) },
63 [IMX7_RESET_DDRC_CORE_RST] = { SRC_DDRC_RCR, BIT(1) },
66 static int imx7_reset_deassert_imx7(struct reset_ctl *rst)
68 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
69 const struct imx7_src_signal *sig = imx7_src_signals;
72 if (rst->id >= IMX7_RESET_NUM)
75 if (rst->id == IMX7_RESET_PCIEPHY) {
77 * wait for more than 10us to release phy g_rst and
83 val = readl(priv->base + sig[rst->id].offset);
85 case IMX7_RESET_PCIE_CTRL_APPS_EN:
86 val |= sig[rst->id].bit;
89 val &= ~sig[rst->id].bit;
92 writel(val, priv->base + sig[rst->id].offset);
97 static int imx7_reset_assert_imx7(struct reset_ctl *rst)
99 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
100 const struct imx7_src_signal *sig = imx7_src_signals;
103 if (rst->id >= IMX7_RESET_NUM)
106 val = readl(priv->base + sig[rst->id].offset);
108 case IMX7_RESET_PCIE_CTRL_APPS_EN:
109 val &= ~sig[rst->id].bit;
112 val |= sig[rst->id].bit;
115 writel(val, priv->base + sig[rst->id].offset);
120 enum imx8mq_src_registers {
121 SRC_A53RCR0 = 0x0004,
122 SRC_HDMI_RCR = 0x0030,
123 SRC_DISP_RCR = 0x0034,
124 SRC_GPU_RCR = 0x0040,
125 SRC_VPU_RCR = 0x0044,
126 SRC_PCIE2_RCR = 0x0048,
127 SRC_MIPIPHY1_RCR = 0x004c,
128 SRC_MIPIPHY2_RCR = 0x0050,
129 SRC_DDRC2_RCR = 0x1004,
132 static const struct imx7_src_signal imx8mq_src_signals[IMX8MQ_RESET_NUM] = {
133 [IMX8MQ_RESET_A53_CORE_POR_RESET0] = { SRC_A53RCR0, BIT(0) },
134 [IMX8MQ_RESET_A53_CORE_POR_RESET1] = { SRC_A53RCR0, BIT(1) },
135 [IMX8MQ_RESET_A53_CORE_POR_RESET2] = { SRC_A53RCR0, BIT(2) },
136 [IMX8MQ_RESET_A53_CORE_POR_RESET3] = { SRC_A53RCR0, BIT(3) },
137 [IMX8MQ_RESET_A53_CORE_RESET0] = { SRC_A53RCR0, BIT(4) },
138 [IMX8MQ_RESET_A53_CORE_RESET1] = { SRC_A53RCR0, BIT(5) },
139 [IMX8MQ_RESET_A53_CORE_RESET2] = { SRC_A53RCR0, BIT(6) },
140 [IMX8MQ_RESET_A53_CORE_RESET3] = { SRC_A53RCR0, BIT(7) },
141 [IMX8MQ_RESET_A53_DBG_RESET0] = { SRC_A53RCR0, BIT(8) },
142 [IMX8MQ_RESET_A53_DBG_RESET1] = { SRC_A53RCR0, BIT(9) },
143 [IMX8MQ_RESET_A53_DBG_RESET2] = { SRC_A53RCR0, BIT(10) },
144 [IMX8MQ_RESET_A53_DBG_RESET3] = { SRC_A53RCR0, BIT(11) },
145 [IMX8MQ_RESET_A53_ETM_RESET0] = { SRC_A53RCR0, BIT(12) },
146 [IMX8MQ_RESET_A53_ETM_RESET1] = { SRC_A53RCR0, BIT(13) },
147 [IMX8MQ_RESET_A53_ETM_RESET2] = { SRC_A53RCR0, BIT(14) },
148 [IMX8MQ_RESET_A53_ETM_RESET3] = { SRC_A53RCR0, BIT(15) },
149 [IMX8MQ_RESET_A53_SOC_DBG_RESET] = { SRC_A53RCR0, BIT(20) },
150 [IMX8MQ_RESET_A53_L2RESET] = { SRC_A53RCR0, BIT(21) },
151 [IMX8MQ_RESET_SW_NON_SCLR_M4C_RST] = { SRC_M4RCR, BIT(0) },
152 [IMX8MQ_RESET_OTG1_PHY_RESET] = { SRC_USBOPHY1_RCR, BIT(0) },
153 [IMX8MQ_RESET_OTG2_PHY_RESET] = { SRC_USBOPHY2_RCR, BIT(0) },
154 [IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N] = { SRC_MIPIPHY_RCR, BIT(1) },
155 [IMX8MQ_RESET_MIPI_DSI_RESET_N] = { SRC_MIPIPHY_RCR, BIT(2) },
156 [IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N] = { SRC_MIPIPHY_RCR, BIT(3) },
157 [IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N] = { SRC_MIPIPHY_RCR, BIT(4) },
158 [IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N] = { SRC_MIPIPHY_RCR, BIT(5) },
159 [IMX8MQ_RESET_PCIEPHY] = { SRC_PCIEPHY_RCR,
161 [IMX8MQ_RESET_PCIEPHY_PERST] = { SRC_PCIEPHY_RCR, BIT(3) },
162 [IMX8MQ_RESET_PCIE_CTRL_APPS_EN] = { SRC_PCIEPHY_RCR, BIT(6) },
163 [IMX8MQ_RESET_PCIE_CTRL_APPS_TURNOFF] = { SRC_PCIEPHY_RCR, BIT(11) },
164 [IMX8MQ_RESET_HDMI_PHY_APB_RESET] = { SRC_HDMI_RCR, BIT(0) },
165 [IMX8MQ_RESET_DISP_RESET] = { SRC_DISP_RCR, BIT(0) },
166 [IMX8MQ_RESET_GPU_RESET] = { SRC_GPU_RCR, BIT(0) },
167 [IMX8MQ_RESET_VPU_RESET] = { SRC_VPU_RCR, BIT(0) },
168 [IMX8MQ_RESET_PCIEPHY2] = { SRC_PCIE2_RCR,
170 [IMX8MQ_RESET_PCIEPHY2_PERST] = { SRC_PCIE2_RCR, BIT(3) },
171 [IMX8MQ_RESET_PCIE2_CTRL_APPS_EN] = { SRC_PCIE2_RCR, BIT(6) },
172 [IMX8MQ_RESET_PCIE2_CTRL_APPS_TURNOFF] = { SRC_PCIE2_RCR, BIT(11) },
173 [IMX8MQ_RESET_MIPI_CSI1_CORE_RESET] = { SRC_MIPIPHY1_RCR, BIT(0) },
174 [IMX8MQ_RESET_MIPI_CSI1_PHY_REF_RESET] = { SRC_MIPIPHY1_RCR, BIT(1) },
175 [IMX8MQ_RESET_MIPI_CSI1_ESC_RESET] = { SRC_MIPIPHY1_RCR, BIT(2) },
176 [IMX8MQ_RESET_MIPI_CSI2_CORE_RESET] = { SRC_MIPIPHY2_RCR, BIT(0) },
177 [IMX8MQ_RESET_MIPI_CSI2_PHY_REF_RESET] = { SRC_MIPIPHY2_RCR, BIT(1) },
178 [IMX8MQ_RESET_MIPI_CSI2_ESC_RESET] = { SRC_MIPIPHY2_RCR, BIT(2) },
179 [IMX8MQ_RESET_DDRC1_PRST] = { SRC_DDRC_RCR, BIT(0) },
180 [IMX8MQ_RESET_DDRC1_CORE_RESET] = { SRC_DDRC_RCR, BIT(1) },
181 [IMX8MQ_RESET_DDRC1_PHY_RESET] = { SRC_DDRC_RCR, BIT(2) },
182 [IMX8MQ_RESET_DDRC2_PHY_RESET] = { SRC_DDRC2_RCR, BIT(0) },
183 [IMX8MQ_RESET_DDRC2_CORE_RESET] = { SRC_DDRC2_RCR, BIT(1) },
184 [IMX8MQ_RESET_DDRC2_PRST] = { SRC_DDRC2_RCR, BIT(2) },
187 static int imx7_reset_deassert_imx8mq(struct reset_ctl *rst)
189 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
190 const struct imx7_src_signal *sig = imx8mq_src_signals;
193 if (rst->id >= IMX8MQ_RESET_NUM)
196 if (rst->id == IMX8MQ_RESET_PCIEPHY ||
197 rst->id == IMX8MQ_RESET_PCIEPHY2) {
199 * wait for more than 10us to release phy g_rst and
205 val = readl(priv->base + sig[rst->id].offset);
207 case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
208 case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN: /* fallthrough */
209 case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N: /* fallthrough */
210 case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N: /* fallthrough */
211 case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N: /* fallthrough */
212 case IMX8MQ_RESET_MIPI_DSI_RESET_N: /* fallthrough */
213 case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N: /* fallthrough */
214 val |= sig[rst->id].bit;
217 val &= ~sig[rst->id].bit;
220 writel(val, priv->base + sig[rst->id].offset);
225 static int imx7_reset_assert_imx8mq(struct reset_ctl *rst)
227 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
228 const struct imx7_src_signal *sig = imx8mq_src_signals;
231 if (rst->id >= IMX8MQ_RESET_NUM)
234 val = readl(priv->base + sig[rst->id].offset);
236 case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
237 case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN: /* fallthrough */
238 case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N: /* fallthrough */
239 case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N: /* fallthrough */
240 case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N: /* fallthrough */
241 case IMX8MQ_RESET_MIPI_DSI_RESET_N: /* fallthrough */
242 case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N: /* fallthrough */
243 val &= ~sig[rst->id].bit;
246 val |= sig[rst->id].bit;
249 writel(val, priv->base + sig[rst->id].offset);
254 static int imx7_reset_assert(struct reset_ctl *rst)
256 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
257 return priv->ops.rst_assert(rst);
260 static int imx7_reset_deassert(struct reset_ctl *rst)
262 struct imx7_reset_priv *priv = dev_get_priv(rst->dev);
263 return priv->ops.rst_deassert(rst);
266 static int imx7_reset_free(struct reset_ctl *rst)
271 static int imx7_reset_request(struct reset_ctl *rst)
276 static const struct reset_ops imx7_reset_reset_ops = {
277 .request = imx7_reset_request,
278 .rfree = imx7_reset_free,
279 .rst_assert = imx7_reset_assert,
280 .rst_deassert = imx7_reset_deassert,
283 static const struct udevice_id imx7_reset_ids[] = {
284 { .compatible = "fsl,imx7d-src" },
285 { .compatible = "fsl,imx8mq-src" },
289 static int imx7_reset_probe(struct udevice *dev)
291 struct imx7_reset_priv *priv = dev_get_priv(dev);
293 priv->base = dev_remap_addr(dev);
297 if (device_is_compatible(dev, "fsl,imx8mq-src")) {
298 priv->ops.rst_assert = imx7_reset_assert_imx8mq;
299 priv->ops.rst_deassert = imx7_reset_deassert_imx8mq;
300 } else if (device_is_compatible(dev, "fsl,imx7d-src")) {
301 priv->ops.rst_assert = imx7_reset_assert_imx7;
302 priv->ops.rst_deassert = imx7_reset_deassert_imx7;
308 U_BOOT_DRIVER(imx7_reset) = {
309 .name = "imx7_reset",
311 .of_match = imx7_reset_ids,
312 .ops = &imx7_reset_reset_ops,
313 .probe = imx7_reset_probe,
314 .priv_auto_alloc_size = sizeof(struct imx7_reset_priv),