1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * AMD ACPI support for ACPI2platform device. |
4 | * |
5 | * Copyright (c) 2014,2015 AMD Corporation. |
6 | * Authors: Ken Xue <Ken.Xue@amd.com> |
7 | * Wu, Jeff <Jeff.Wu@amd.com> |
8 | */ |
9 | |
10 | #include <linux/acpi.h> |
11 | #include <linux/clkdev.h> |
12 | #include <linux/clk-provider.h> |
13 | #include <linux/err.h> |
14 | #include <linux/io.h> |
15 | #include <linux/platform_data/clk-fch.h> |
16 | #include <linux/platform_device.h> |
17 | |
18 | #include "internal.h" |
19 | |
20 | struct apd_private_data; |
21 | |
22 | /** |
23 | * struct apd_device_desc - a descriptor for apd device |
24 | * @fixed_clk_rate: fixed rate input clock source for acpi device; |
25 | * 0 means no fixed rate input clock source |
26 | * @properties: build-in properties of the device such as UART |
27 | * @setup: a hook routine to set device resource during create platform device |
28 | * |
29 | * Device description defined as acpi_device_id.driver_data |
30 | */ |
31 | struct apd_device_desc { |
32 | unsigned int fixed_clk_rate; |
33 | struct property_entry *properties; |
34 | int (*setup)(struct apd_private_data *pdata); |
35 | }; |
36 | |
37 | struct apd_private_data { |
38 | struct clk *clk; |
39 | struct acpi_device *adev; |
40 | const struct apd_device_desc *dev_desc; |
41 | }; |
42 | |
43 | #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64) |
44 | #define APD_ADDR(desc) ((unsigned long)&desc) |
45 | |
46 | static int acpi_apd_setup(struct apd_private_data *pdata) |
47 | { |
48 | const struct apd_device_desc *dev_desc = pdata->dev_desc; |
49 | struct clk *clk; |
50 | |
51 | if (dev_desc->fixed_clk_rate) { |
52 | clk = clk_register_fixed_rate(dev: &pdata->adev->dev, |
53 | name: dev_name(dev: &pdata->adev->dev), |
54 | NULL, flags: 0, fixed_rate: dev_desc->fixed_clk_rate); |
55 | clk_register_clkdev(clk, NULL, dev_name(dev: &pdata->adev->dev)); |
56 | pdata->clk = clk; |
57 | } |
58 | |
59 | return 0; |
60 | } |
61 | |
62 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
63 | |
64 | static int fch_misc_setup(struct apd_private_data *pdata) |
65 | { |
66 | struct acpi_device *adev = pdata->adev; |
67 | const union acpi_object *obj; |
68 | struct platform_device *clkdev; |
69 | struct fch_clk_data *clk_data; |
70 | struct resource_entry *rentry; |
71 | struct list_head resource_list; |
72 | int ret; |
73 | |
74 | clk_data = devm_kzalloc(dev: &adev->dev, size: sizeof(*clk_data), GFP_KERNEL); |
75 | if (!clk_data) |
76 | return -ENOMEM; |
77 | |
78 | INIT_LIST_HEAD(list: &resource_list); |
79 | ret = acpi_dev_get_memory_resources(adev, list: &resource_list); |
80 | if (ret < 0) |
81 | return -ENOENT; |
82 | |
83 | if (!acpi_dev_get_property(adev, name: "clk-name" , ACPI_TYPE_STRING, obj: &obj)) { |
84 | clk_data->name = devm_kzalloc(dev: &adev->dev, size: obj->string.length, |
85 | GFP_KERNEL); |
86 | if (!clk_data->name) |
87 | return -ENOMEM; |
88 | |
89 | strcpy(p: clk_data->name, q: obj->string.pointer); |
90 | } else { |
91 | /* Set default name to mclk if entry missing in firmware */ |
92 | clk_data->name = "mclk" ; |
93 | } |
94 | |
95 | list_for_each_entry(rentry, &resource_list, node) { |
96 | clk_data->base = devm_ioremap(dev: &adev->dev, offset: rentry->res->start, |
97 | size: resource_size(res: rentry->res)); |
98 | break; |
99 | } |
100 | if (!clk_data->base) |
101 | return -ENOMEM; |
102 | |
103 | acpi_dev_free_resource_list(list: &resource_list); |
104 | |
105 | clkdev = platform_device_register_data(parent: &adev->dev, name: "clk-fch" , |
106 | PLATFORM_DEVID_NONE, data: clk_data, |
107 | size: sizeof(*clk_data)); |
108 | return PTR_ERR_OR_ZERO(ptr: clkdev); |
109 | } |
110 | |
111 | static const struct apd_device_desc cz_i2c_desc = { |
112 | .setup = acpi_apd_setup, |
113 | .fixed_clk_rate = 133000000, |
114 | }; |
115 | |
116 | static const struct apd_device_desc wt_i2c_desc = { |
117 | .setup = acpi_apd_setup, |
118 | .fixed_clk_rate = 150000000, |
119 | }; |
120 | |
121 | static struct property_entry uart_properties[] = { |
122 | PROPERTY_ENTRY_U32("reg-io-width" , 4), |
123 | PROPERTY_ENTRY_U32("reg-shift" , 2), |
124 | PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible" ), |
125 | { }, |
126 | }; |
127 | |
128 | static const struct apd_device_desc cz_uart_desc = { |
129 | .setup = acpi_apd_setup, |
130 | .fixed_clk_rate = 48000000, |
131 | .properties = uart_properties, |
132 | }; |
133 | |
134 | static const struct apd_device_desc fch_misc_desc = { |
135 | .setup = fch_misc_setup, |
136 | }; |
137 | #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */ |
138 | |
139 | #ifdef CONFIG_ARM64 |
140 | static const struct apd_device_desc xgene_i2c_desc = { |
141 | .setup = acpi_apd_setup, |
142 | .fixed_clk_rate = 100000000, |
143 | }; |
144 | |
145 | static const struct apd_device_desc vulcan_spi_desc = { |
146 | .setup = acpi_apd_setup, |
147 | .fixed_clk_rate = 133000000, |
148 | }; |
149 | |
150 | static const struct apd_device_desc hip07_i2c_desc = { |
151 | .setup = acpi_apd_setup, |
152 | .fixed_clk_rate = 200000000, |
153 | }; |
154 | |
155 | static const struct apd_device_desc hip08_i2c_desc = { |
156 | .setup = acpi_apd_setup, |
157 | .fixed_clk_rate = 250000000, |
158 | }; |
159 | |
160 | static const struct apd_device_desc hip08_lite_i2c_desc = { |
161 | .setup = acpi_apd_setup, |
162 | .fixed_clk_rate = 125000000, |
163 | }; |
164 | |
165 | static const struct apd_device_desc thunderx2_i2c_desc = { |
166 | .setup = acpi_apd_setup, |
167 | .fixed_clk_rate = 125000000, |
168 | }; |
169 | |
170 | static const struct apd_device_desc nxp_i2c_desc = { |
171 | .setup = acpi_apd_setup, |
172 | .fixed_clk_rate = 350000000, |
173 | }; |
174 | |
175 | static const struct apd_device_desc hip08_spi_desc = { |
176 | .setup = acpi_apd_setup, |
177 | .fixed_clk_rate = 250000000, |
178 | }; |
179 | #endif /* CONFIG_ARM64 */ |
180 | |
181 | #endif |
182 | |
183 | /* |
184 | * Create platform device during acpi scan attach handle. |
185 | * Return value > 0 on success of creating device. |
186 | */ |
187 | static int acpi_apd_create_device(struct acpi_device *adev, |
188 | const struct acpi_device_id *id) |
189 | { |
190 | const struct apd_device_desc *dev_desc = (void *)id->driver_data; |
191 | struct apd_private_data *pdata; |
192 | struct platform_device *pdev; |
193 | int ret; |
194 | |
195 | if (!dev_desc) { |
196 | pdev = acpi_create_platform_device(adev, NULL); |
197 | return IS_ERR_OR_NULL(ptr: pdev) ? PTR_ERR(ptr: pdev) : 1; |
198 | } |
199 | |
200 | pdata = kzalloc(size: sizeof(*pdata), GFP_KERNEL); |
201 | if (!pdata) |
202 | return -ENOMEM; |
203 | |
204 | pdata->adev = adev; |
205 | pdata->dev_desc = dev_desc; |
206 | |
207 | if (dev_desc->setup) { |
208 | ret = dev_desc->setup(pdata); |
209 | if (ret) |
210 | goto err_out; |
211 | } |
212 | |
213 | adev->driver_data = pdata; |
214 | pdev = acpi_create_platform_device(adev, dev_desc->properties); |
215 | if (!IS_ERR_OR_NULL(ptr: pdev)) |
216 | return 1; |
217 | |
218 | ret = PTR_ERR(ptr: pdev); |
219 | adev->driver_data = NULL; |
220 | |
221 | err_out: |
222 | kfree(objp: pdata); |
223 | return ret; |
224 | } |
225 | |
226 | static const struct acpi_device_id acpi_apd_device_ids[] = { |
227 | /* Generic apd devices */ |
228 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
229 | { "AMD0010" , APD_ADDR(cz_i2c_desc) }, |
230 | { "AMD0020" , APD_ADDR(cz_uart_desc) }, |
231 | { "AMD0030" , }, |
232 | { "AMD0040" , APD_ADDR(fch_misc_desc)}, |
233 | { "AMDI0010" , APD_ADDR(wt_i2c_desc) }, |
234 | { "AMDI0019" , APD_ADDR(wt_i2c_desc) }, |
235 | { "AMDI0020" , APD_ADDR(cz_uart_desc) }, |
236 | { "AMDI0022" , APD_ADDR(cz_uart_desc) }, |
237 | { "HYGO0010" , APD_ADDR(wt_i2c_desc) }, |
238 | #endif |
239 | #ifdef CONFIG_ARM64 |
240 | { "APMC0D0F" , APD_ADDR(xgene_i2c_desc) }, |
241 | { "BRCM900D" , APD_ADDR(vulcan_spi_desc) }, |
242 | { "CAV900D" , APD_ADDR(vulcan_spi_desc) }, |
243 | { "CAV9007" , APD_ADDR(thunderx2_i2c_desc) }, |
244 | { "HISI02A1" , APD_ADDR(hip07_i2c_desc) }, |
245 | { "HISI02A2" , APD_ADDR(hip08_i2c_desc) }, |
246 | { "HISI02A3" , APD_ADDR(hip08_lite_i2c_desc) }, |
247 | { "HISI0173" , APD_ADDR(hip08_spi_desc) }, |
248 | { "NXP0001" , APD_ADDR(nxp_i2c_desc) }, |
249 | #endif |
250 | { } |
251 | }; |
252 | |
253 | static struct acpi_scan_handler apd_handler = { |
254 | .ids = acpi_apd_device_ids, |
255 | .attach = acpi_apd_create_device, |
256 | }; |
257 | |
258 | void __init acpi_apd_init(void) |
259 | { |
260 | acpi_scan_add_handler(handler: &apd_handler); |
261 | } |
262 | |