1 /*
2 * Intel LPSS PCI support.
3 *
4 * Copyright (C) 2015, Intel Corporation
5 *
6 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 * Mika Westerberg <mika.westerberg@linux.intel.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/ioport.h>
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/pci.h>
18 #include <linux/pm.h>
19 #include <linux/pm_runtime.h>
20 #include <linux/property.h>
21
22 #include "intel-lpss.h"
23
intel_lpss_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)24 static int intel_lpss_pci_probe(struct pci_dev *pdev,
25 const struct pci_device_id *id)
26 {
27 struct intel_lpss_platform_info *info;
28 int ret;
29
30 ret = pcim_enable_device(pdev);
31 if (ret)
32 return ret;
33
34 info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
35 GFP_KERNEL);
36 if (!info)
37 return -ENOMEM;
38
39 info->mem = &pdev->resource[0];
40 info->irq = pdev->irq;
41
42 pdev->d3cold_delay = 0;
43
44 /* Probably it is enough to set this for iDMA capable devices only */
45 pci_set_master(pdev);
46 pci_try_set_mwi(pdev);
47
48 ret = intel_lpss_probe(&pdev->dev, info);
49 if (ret)
50 return ret;
51
52 pm_runtime_put(&pdev->dev);
53 pm_runtime_allow(&pdev->dev);
54
55 return 0;
56 }
57
intel_lpss_pci_remove(struct pci_dev * pdev)58 static void intel_lpss_pci_remove(struct pci_dev *pdev)
59 {
60 pm_runtime_forbid(&pdev->dev);
61 pm_runtime_get_sync(&pdev->dev);
62
63 intel_lpss_remove(&pdev->dev);
64 }
65
66 static INTEL_LPSS_PM_OPS(intel_lpss_pci_pm_ops);
67
68 static const struct intel_lpss_platform_info spt_info = {
69 .clk_rate = 120000000,
70 };
71
72 static struct property_entry spt_i2c_properties[] = {
73 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
74 { },
75 };
76
77 static const struct intel_lpss_platform_info spt_i2c_info = {
78 .clk_rate = 120000000,
79 .properties = spt_i2c_properties,
80 };
81
82 static struct property_entry uart_properties[] = {
83 PROPERTY_ENTRY_U32("reg-io-width", 4),
84 PROPERTY_ENTRY_U32("reg-shift", 2),
85 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
86 { },
87 };
88
89 static const struct intel_lpss_platform_info spt_uart_info = {
90 .clk_rate = 120000000,
91 .clk_con_id = "baudclk",
92 .properties = uart_properties,
93 };
94
95 static const struct intel_lpss_platform_info bxt_info = {
96 .clk_rate = 100000000,
97 };
98
99 static const struct intel_lpss_platform_info bxt_uart_info = {
100 .clk_rate = 100000000,
101 .clk_con_id = "baudclk",
102 .properties = uart_properties,
103 };
104
105 static struct property_entry bxt_i2c_properties[] = {
106 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
107 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
108 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
109 { },
110 };
111
112 static const struct intel_lpss_platform_info bxt_i2c_info = {
113 .clk_rate = 133000000,
114 .properties = bxt_i2c_properties,
115 };
116
117 static struct property_entry apl_i2c_properties[] = {
118 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
119 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
120 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
121 { },
122 };
123
124 static const struct intel_lpss_platform_info apl_i2c_info = {
125 .clk_rate = 133000000,
126 .properties = apl_i2c_properties,
127 };
128
129 static struct property_entry glk_i2c_properties[] = {
130 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 313),
131 PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
132 PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 290),
133 { },
134 };
135
136 static const struct intel_lpss_platform_info glk_i2c_info = {
137 .clk_rate = 133000000,
138 .properties = glk_i2c_properties,
139 };
140
141 static const struct intel_lpss_platform_info cnl_i2c_info = {
142 .clk_rate = 216000000,
143 .properties = spt_i2c_properties,
144 };
145
146 static const struct pci_device_id intel_lpss_pci_ids[] = {
147 /* BXT A-Step */
148 { PCI_VDEVICE(INTEL, 0x0aac), (kernel_ulong_t)&bxt_i2c_info },
149 { PCI_VDEVICE(INTEL, 0x0aae), (kernel_ulong_t)&bxt_i2c_info },
150 { PCI_VDEVICE(INTEL, 0x0ab0), (kernel_ulong_t)&bxt_i2c_info },
151 { PCI_VDEVICE(INTEL, 0x0ab2), (kernel_ulong_t)&bxt_i2c_info },
152 { PCI_VDEVICE(INTEL, 0x0ab4), (kernel_ulong_t)&bxt_i2c_info },
153 { PCI_VDEVICE(INTEL, 0x0ab6), (kernel_ulong_t)&bxt_i2c_info },
154 { PCI_VDEVICE(INTEL, 0x0ab8), (kernel_ulong_t)&bxt_i2c_info },
155 { PCI_VDEVICE(INTEL, 0x0aba), (kernel_ulong_t)&bxt_i2c_info },
156 { PCI_VDEVICE(INTEL, 0x0abc), (kernel_ulong_t)&bxt_uart_info },
157 { PCI_VDEVICE(INTEL, 0x0abe), (kernel_ulong_t)&bxt_uart_info },
158 { PCI_VDEVICE(INTEL, 0x0ac0), (kernel_ulong_t)&bxt_uart_info },
159 { PCI_VDEVICE(INTEL, 0x0ac2), (kernel_ulong_t)&bxt_info },
160 { PCI_VDEVICE(INTEL, 0x0ac4), (kernel_ulong_t)&bxt_info },
161 { PCI_VDEVICE(INTEL, 0x0ac6), (kernel_ulong_t)&bxt_info },
162 { PCI_VDEVICE(INTEL, 0x0aee), (kernel_ulong_t)&bxt_uart_info },
163 /* BXT B-Step */
164 { PCI_VDEVICE(INTEL, 0x1aac), (kernel_ulong_t)&bxt_i2c_info },
165 { PCI_VDEVICE(INTEL, 0x1aae), (kernel_ulong_t)&bxt_i2c_info },
166 { PCI_VDEVICE(INTEL, 0x1ab0), (kernel_ulong_t)&bxt_i2c_info },
167 { PCI_VDEVICE(INTEL, 0x1ab2), (kernel_ulong_t)&bxt_i2c_info },
168 { PCI_VDEVICE(INTEL, 0x1ab4), (kernel_ulong_t)&bxt_i2c_info },
169 { PCI_VDEVICE(INTEL, 0x1ab6), (kernel_ulong_t)&bxt_i2c_info },
170 { PCI_VDEVICE(INTEL, 0x1ab8), (kernel_ulong_t)&bxt_i2c_info },
171 { PCI_VDEVICE(INTEL, 0x1aba), (kernel_ulong_t)&bxt_i2c_info },
172 { PCI_VDEVICE(INTEL, 0x1abc), (kernel_ulong_t)&bxt_uart_info },
173 { PCI_VDEVICE(INTEL, 0x1abe), (kernel_ulong_t)&bxt_uart_info },
174 { PCI_VDEVICE(INTEL, 0x1ac0), (kernel_ulong_t)&bxt_uart_info },
175 { PCI_VDEVICE(INTEL, 0x1ac2), (kernel_ulong_t)&bxt_info },
176 { PCI_VDEVICE(INTEL, 0x1ac4), (kernel_ulong_t)&bxt_info },
177 { PCI_VDEVICE(INTEL, 0x1ac6), (kernel_ulong_t)&bxt_info },
178 { PCI_VDEVICE(INTEL, 0x1aee), (kernel_ulong_t)&bxt_uart_info },
179 /* GLK */
180 { PCI_VDEVICE(INTEL, 0x31ac), (kernel_ulong_t)&glk_i2c_info },
181 { PCI_VDEVICE(INTEL, 0x31ae), (kernel_ulong_t)&glk_i2c_info },
182 { PCI_VDEVICE(INTEL, 0x31b0), (kernel_ulong_t)&glk_i2c_info },
183 { PCI_VDEVICE(INTEL, 0x31b2), (kernel_ulong_t)&glk_i2c_info },
184 { PCI_VDEVICE(INTEL, 0x31b4), (kernel_ulong_t)&glk_i2c_info },
185 { PCI_VDEVICE(INTEL, 0x31b6), (kernel_ulong_t)&glk_i2c_info },
186 { PCI_VDEVICE(INTEL, 0x31b8), (kernel_ulong_t)&glk_i2c_info },
187 { PCI_VDEVICE(INTEL, 0x31ba), (kernel_ulong_t)&glk_i2c_info },
188 { PCI_VDEVICE(INTEL, 0x31bc), (kernel_ulong_t)&bxt_uart_info },
189 { PCI_VDEVICE(INTEL, 0x31be), (kernel_ulong_t)&bxt_uart_info },
190 { PCI_VDEVICE(INTEL, 0x31c0), (kernel_ulong_t)&bxt_uart_info },
191 { PCI_VDEVICE(INTEL, 0x31ee), (kernel_ulong_t)&bxt_uart_info },
192 { PCI_VDEVICE(INTEL, 0x31c2), (kernel_ulong_t)&bxt_info },
193 { PCI_VDEVICE(INTEL, 0x31c4), (kernel_ulong_t)&bxt_info },
194 { PCI_VDEVICE(INTEL, 0x31c6), (kernel_ulong_t)&bxt_info },
195 /* APL */
196 { PCI_VDEVICE(INTEL, 0x5aac), (kernel_ulong_t)&apl_i2c_info },
197 { PCI_VDEVICE(INTEL, 0x5aae), (kernel_ulong_t)&apl_i2c_info },
198 { PCI_VDEVICE(INTEL, 0x5ab0), (kernel_ulong_t)&apl_i2c_info },
199 { PCI_VDEVICE(INTEL, 0x5ab2), (kernel_ulong_t)&apl_i2c_info },
200 { PCI_VDEVICE(INTEL, 0x5ab4), (kernel_ulong_t)&apl_i2c_info },
201 { PCI_VDEVICE(INTEL, 0x5ab6), (kernel_ulong_t)&apl_i2c_info },
202 { PCI_VDEVICE(INTEL, 0x5ab8), (kernel_ulong_t)&apl_i2c_info },
203 { PCI_VDEVICE(INTEL, 0x5aba), (kernel_ulong_t)&apl_i2c_info },
204 { PCI_VDEVICE(INTEL, 0x5abc), (kernel_ulong_t)&bxt_uart_info },
205 { PCI_VDEVICE(INTEL, 0x5abe), (kernel_ulong_t)&bxt_uart_info },
206 { PCI_VDEVICE(INTEL, 0x5ac0), (kernel_ulong_t)&bxt_uart_info },
207 { PCI_VDEVICE(INTEL, 0x5ac2), (kernel_ulong_t)&bxt_info },
208 { PCI_VDEVICE(INTEL, 0x5ac4), (kernel_ulong_t)&bxt_info },
209 { PCI_VDEVICE(INTEL, 0x5ac6), (kernel_ulong_t)&bxt_info },
210 { PCI_VDEVICE(INTEL, 0x5aee), (kernel_ulong_t)&bxt_uart_info },
211 /* SPT-LP */
212 { PCI_VDEVICE(INTEL, 0x9d27), (kernel_ulong_t)&spt_uart_info },
213 { PCI_VDEVICE(INTEL, 0x9d28), (kernel_ulong_t)&spt_uart_info },
214 { PCI_VDEVICE(INTEL, 0x9d29), (kernel_ulong_t)&spt_info },
215 { PCI_VDEVICE(INTEL, 0x9d2a), (kernel_ulong_t)&spt_info },
216 { PCI_VDEVICE(INTEL, 0x9d60), (kernel_ulong_t)&spt_i2c_info },
217 { PCI_VDEVICE(INTEL, 0x9d61), (kernel_ulong_t)&spt_i2c_info },
218 { PCI_VDEVICE(INTEL, 0x9d62), (kernel_ulong_t)&spt_i2c_info },
219 { PCI_VDEVICE(INTEL, 0x9d63), (kernel_ulong_t)&spt_i2c_info },
220 { PCI_VDEVICE(INTEL, 0x9d64), (kernel_ulong_t)&spt_i2c_info },
221 { PCI_VDEVICE(INTEL, 0x9d65), (kernel_ulong_t)&spt_i2c_info },
222 { PCI_VDEVICE(INTEL, 0x9d66), (kernel_ulong_t)&spt_uart_info },
223 /* CNL-LP */
224 { PCI_VDEVICE(INTEL, 0x9da8), (kernel_ulong_t)&spt_uart_info },
225 { PCI_VDEVICE(INTEL, 0x9da9), (kernel_ulong_t)&spt_uart_info },
226 { PCI_VDEVICE(INTEL, 0x9daa), (kernel_ulong_t)&spt_info },
227 { PCI_VDEVICE(INTEL, 0x9dab), (kernel_ulong_t)&spt_info },
228 { PCI_VDEVICE(INTEL, 0x9dfb), (kernel_ulong_t)&spt_info },
229 { PCI_VDEVICE(INTEL, 0x9dc5), (kernel_ulong_t)&cnl_i2c_info },
230 { PCI_VDEVICE(INTEL, 0x9dc6), (kernel_ulong_t)&cnl_i2c_info },
231 { PCI_VDEVICE(INTEL, 0x9dc7), (kernel_ulong_t)&spt_uart_info },
232 { PCI_VDEVICE(INTEL, 0x9de8), (kernel_ulong_t)&cnl_i2c_info },
233 { PCI_VDEVICE(INTEL, 0x9de9), (kernel_ulong_t)&cnl_i2c_info },
234 { PCI_VDEVICE(INTEL, 0x9dea), (kernel_ulong_t)&cnl_i2c_info },
235 { PCI_VDEVICE(INTEL, 0x9deb), (kernel_ulong_t)&cnl_i2c_info },
236 /* SPT-H */
237 { PCI_VDEVICE(INTEL, 0xa127), (kernel_ulong_t)&spt_uart_info },
238 { PCI_VDEVICE(INTEL, 0xa128), (kernel_ulong_t)&spt_uart_info },
239 { PCI_VDEVICE(INTEL, 0xa129), (kernel_ulong_t)&spt_info },
240 { PCI_VDEVICE(INTEL, 0xa12a), (kernel_ulong_t)&spt_info },
241 { PCI_VDEVICE(INTEL, 0xa160), (kernel_ulong_t)&spt_i2c_info },
242 { PCI_VDEVICE(INTEL, 0xa161), (kernel_ulong_t)&spt_i2c_info },
243 { PCI_VDEVICE(INTEL, 0xa162), (kernel_ulong_t)&spt_i2c_info },
244 { PCI_VDEVICE(INTEL, 0xa166), (kernel_ulong_t)&spt_uart_info },
245 /* KBL-H */
246 { PCI_VDEVICE(INTEL, 0xa2a7), (kernel_ulong_t)&spt_uart_info },
247 { PCI_VDEVICE(INTEL, 0xa2a8), (kernel_ulong_t)&spt_uart_info },
248 { PCI_VDEVICE(INTEL, 0xa2a9), (kernel_ulong_t)&spt_info },
249 { PCI_VDEVICE(INTEL, 0xa2aa), (kernel_ulong_t)&spt_info },
250 { PCI_VDEVICE(INTEL, 0xa2e0), (kernel_ulong_t)&spt_i2c_info },
251 { PCI_VDEVICE(INTEL, 0xa2e1), (kernel_ulong_t)&spt_i2c_info },
252 { PCI_VDEVICE(INTEL, 0xa2e2), (kernel_ulong_t)&spt_i2c_info },
253 { PCI_VDEVICE(INTEL, 0xa2e3), (kernel_ulong_t)&spt_i2c_info },
254 { PCI_VDEVICE(INTEL, 0xa2e6), (kernel_ulong_t)&spt_uart_info },
255 /* CNL-H */
256 { PCI_VDEVICE(INTEL, 0xa328), (kernel_ulong_t)&spt_uart_info },
257 { PCI_VDEVICE(INTEL, 0xa329), (kernel_ulong_t)&spt_uart_info },
258 { PCI_VDEVICE(INTEL, 0xa32a), (kernel_ulong_t)&spt_info },
259 { PCI_VDEVICE(INTEL, 0xa32b), (kernel_ulong_t)&spt_info },
260 { PCI_VDEVICE(INTEL, 0xa37b), (kernel_ulong_t)&spt_info },
261 { PCI_VDEVICE(INTEL, 0xa347), (kernel_ulong_t)&spt_uart_info },
262 { PCI_VDEVICE(INTEL, 0xa368), (kernel_ulong_t)&cnl_i2c_info },
263 { PCI_VDEVICE(INTEL, 0xa369), (kernel_ulong_t)&cnl_i2c_info },
264 { PCI_VDEVICE(INTEL, 0xa36a), (kernel_ulong_t)&cnl_i2c_info },
265 { PCI_VDEVICE(INTEL, 0xa36b), (kernel_ulong_t)&cnl_i2c_info },
266 { }
267 };
268 MODULE_DEVICE_TABLE(pci, intel_lpss_pci_ids);
269
270 static struct pci_driver intel_lpss_pci_driver = {
271 .name = "intel-lpss",
272 .id_table = intel_lpss_pci_ids,
273 .probe = intel_lpss_pci_probe,
274 .remove = intel_lpss_pci_remove,
275 .driver = {
276 .pm = &intel_lpss_pci_pm_ops,
277 },
278 };
279
280 module_pci_driver(intel_lpss_pci_driver);
281
282 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
283 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
284 MODULE_DESCRIPTION("Intel LPSS PCI driver");
285 MODULE_LICENSE("GPL v2");
286