add wifi6 8852be driver

hc

2024-12-19 9370bb92b2d16684ee45cf24e879c93c509162da

 kernel/drivers/bus/imx-weim.c
..
..
@@ -19,6 +19,8 @@
19
19
 	unsigned int	cs_count;
20
20
 	unsigned int	cs_regs_count;
21
21
 	unsigned int	cs_stride;
22
+	unsigned int	wcr_offset;
23
+	unsigned int	wcr_bcm;
22
24
 };
23
25
 
24
26
 static const struct imx_weim_devtype imx1_weim_devtype = {
..
..
@@ -37,6 +39,8 @@
37
39
 	.cs_count	= 4,
38
40
 	.cs_regs_count	= 6,
39
41
 	.cs_stride	= 0x18,
42
+	.wcr_offset	= 0x90,
43
+	.wcr_bcm	= BIT(0),
40
44
 };
41
45
 
42
46
 static const struct imx_weim_devtype imx51_weim_devtype = {
..
..
@@ -46,6 +50,17 @@
46
50
 };
47
51
 
48
52
 #define MAX_CS_REGS_COUNT	6
53
+#define MAX_CS_COUNT		6
54
+#define OF_REG_SIZE		3
55
+
56
+struct cs_timing {
57
+	bool is_applied;
58
+	u32 regs[MAX_CS_REGS_COUNT];
59
+};
60
+
61
+struct cs_timing_state {
62
+	struct cs_timing cs[MAX_CS_COUNT];
63
+};
49
64
 
50
65
 static const struct of_device_id weim_id_table[] = {
51
66
 	/* i.MX1/21 */
..
..
@@ -61,7 +76,7 @@
61
76
 };
62
77
 MODULE_DEVICE_TABLE(of, weim_id_table);
63
78
 
64
-static int __init imx_weim_gpr_setup(struct platform_device *pdev)
79
+static int imx_weim_gpr_setup(struct platform_device *pdev)
65
80
 {
66
81
 	struct device_node *np = pdev->dev.of_node;
67
82
 	struct property *prop;
..
..
@@ -111,21 +126,19 @@
111
126
 }
112
127
 
113
128
 /* Parse and set the timing for this device. */
114
-static int __init weim_timing_setup(struct device_node *np, void __iomem *base,
115
-				    const struct imx_weim_devtype *devtype)
129
+static int weim_timing_setup(struct device *dev,
130
+			     struct device_node *np, void __iomem *base,
131
+			     const struct imx_weim_devtype *devtype,
132
+			     struct cs_timing_state *ts)
116
133
 {
117
134
 	u32 cs_idx, value[MAX_CS_REGS_COUNT];
118
135
 	int i, ret;
136
+	int reg_idx, num_regs;
137
+	struct cs_timing *cst;
119
138
 
120
139
 	if (WARN_ON(devtype->cs_regs_count > MAX_CS_REGS_COUNT))
121
140
 		return -EINVAL;
122
-
123
-	/* get the CS index from this child node's "reg" property. */
124
-	ret = of_property_read_u32(np, "reg", &cs_idx);
125
-	if (ret)
126
-		return ret;
127
-
128
-	if (cs_idx >= devtype->cs_count)
141
+	if (WARN_ON(devtype->cs_count > MAX_CS_COUNT))
129
142
 		return -EINVAL;
130
143
 
131
144
 	ret = of_property_read_u32_array(np, "fsl,weim-cs-timing",
..
..
@@ -133,21 +146,56 @@
133
146
 	if (ret)
134
147
 		return ret;
135
148
 
136
-	/* set the timing for WEIM */
137
-	for (i = 0; i < devtype->cs_regs_count; i++)
138
-		writel(value[i], base + cs_idx * devtype->cs_stride + i * 4);
149
+	/*
150
+	 * the child node's "reg" property may contain multiple address ranges,
151
+	 * extract the chip select for each.
152
+	 */
153
+	num_regs = of_property_count_elems_of_size(np, "reg", OF_REG_SIZE);
154
+	if (num_regs < 0)
155
+		return num_regs;
156
+	if (!num_regs)
157
+		return -EINVAL;
158
+	for (reg_idx = 0; reg_idx < num_regs; reg_idx++) {
159
+		/* get the CS index from this child node's "reg" property. */
160
+		ret = of_property_read_u32_index(np, "reg",
161
+					reg_idx * OF_REG_SIZE, &cs_idx);
162
+		if (ret)
163
+			break;
164
+
165
+		if (cs_idx >= devtype->cs_count)
166
+			return -EINVAL;
167
+
168
+		/* prevent re-configuring a CS that's already been configured */
169
+		cst = &ts->cs[cs_idx];
170
+		if (cst->is_applied && memcmp(value, cst->regs,
171
+					devtype->cs_regs_count * sizeof(u32))) {
172
+			dev_err(dev, "fsl,weim-cs-timing conflict on %pOF", np);
173
+			return -EINVAL;
174
+		}
175
+
176
+		/* set the timing for WEIM */
177
+		for (i = 0; i < devtype->cs_regs_count; i++)
178
+			writel(value[i],
179
+				base + cs_idx * devtype->cs_stride + i * 4);
180
+		if (!cst->is_applied) {
181
+			cst->is_applied = true;
182
+			memcpy(cst->regs, value,
183
+				devtype->cs_regs_count * sizeof(u32));
184
+		}
185
+	}
139
186
 
140
187
 	return 0;
141
188
 }
142
189
 
143
-static int __init weim_parse_dt(struct platform_device *pdev,
144
-				void __iomem *base)
190
+static int weim_parse_dt(struct platform_device *pdev, void __iomem *base)
145
191
 {
146
192
 	const struct of_device_id *of_id = of_match_device(weim_id_table,
147
193
 							   &pdev->dev);
148
194
 	const struct imx_weim_devtype *devtype = of_id->data;
195
+	int ret = 0, have_child = 0;
149
196
 	struct device_node *child;
150
-	int ret, have_child = 0;
197
+	struct cs_timing_state ts = {};
198
+	u32 reg;
151
199
 
152
200
 	if (devtype == &imx50_weim_devtype) {
153
201
 		ret = imx_weim_gpr_setup(pdev);
..
..
@@ -155,11 +203,19 @@
155
203
 			return ret;
156
204
 	}
157
205
 
158
-	for_each_available_child_of_node(pdev->dev.of_node, child) {
159
-		if (!child->name)
160
-			continue;
206
+	if (of_property_read_bool(pdev->dev.of_node, "fsl,burst-clk-enable")) {
207
+		if (devtype->wcr_bcm) {
208
+			reg = readl(base + devtype->wcr_offset);
209
+			writel(reg | devtype->wcr_bcm,
210
+				base + devtype->wcr_offset);
211
+		} else {
212
+			dev_err(&pdev->dev, "burst clk mode not supported.\n");
213
+			return -EINVAL;
214
+		}
215
+	}
161
216
 
162
-		ret = weim_timing_setup(child, base, devtype);
217
+	for_each_available_child_of_node(pdev->dev.of_node, child) {
218
+		ret = weim_timing_setup(&pdev->dev, child, base, devtype, &ts);
163
219
 		if (ret)
164
220
 			dev_warn(&pdev->dev, "%pOF set timing failed.\n",
165
221
 				child);
..
..
@@ -176,7 +232,7 @@
176
232
 	return ret;
177
233
 }
178
234
 
179
-static int __init weim_probe(struct platform_device *pdev)
235
+static int weim_probe(struct platform_device *pdev)
180
236
 {
181
237
 	struct resource *res;
182
238
 	struct clk *clk;
..
..
@@ -213,8 +269,9 @@
213
269
 		.name		= "imx-weim",
214
270
 		.of_match_table	= weim_id_table,
215
271
 	},
272
+	.probe = weim_probe,
216
273
 };
217
-module_platform_driver_probe(weim_driver, weim_probe);
274
+module_platform_driver(weim_driver);
218
275
 
219
276
 MODULE_AUTHOR("Freescale Semiconductor Inc.");
220
277
 MODULE_DESCRIPTION("i.MX EIM Controller Driver");