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11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/platform_device.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/module.h>
17#include <linux/of.h>
18#include <linux/of_device.h>
19
20#include "omap_l3_smx.h"
21
22static inline u64 omap3_l3_readll(void __iomem *base, u16 reg)
23{
24 return __raw_readll(base + reg);
25}
26
27static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value)
28{
29 __raw_writell(value, base + reg);
30}
31
32static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error)
33{
34 return (error & 0x0f000000) >> L3_ERROR_LOG_CODE;
35}
36
37static inline u32 omap3_l3_decode_addr(u64 error_addr)
38{
39 return error_addr & 0xffffffff;
40}
41
42static inline unsigned omap3_l3_decode_cmd(u64 error)
43{
44 return (error & 0x07) >> L3_ERROR_LOG_CMD;
45}
46
47static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error)
48{
49 return (error & 0xff00) >> L3_ERROR_LOG_INITID;
50}
51
52static inline unsigned omap3_l3_decode_req_info(u64 error)
53{
54 return (error >> 32) & 0xffff;
55}
56
57static char *omap3_l3_code_string(u8 code)
58{
59 switch (code) {
60 case OMAP_L3_CODE_NOERROR:
61 return "No Error";
62 case OMAP_L3_CODE_UNSUP_CMD:
63 return "Unsupported Command";
64 case OMAP_L3_CODE_ADDR_HOLE:
65 return "Address Hole";
66 case OMAP_L3_CODE_PROTECT_VIOLATION:
67 return "Protection Violation";
68 case OMAP_L3_CODE_IN_BAND_ERR:
69 return "In-band Error";
70 case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT:
71 return "Request Timeout Not Accepted";
72 case OMAP_L3_CODE_REQ_TOUT_NO_RESP:
73 return "Request Timeout, no response";
74 default:
75 return "UNKNOWN error";
76 }
77}
78
79static char *omap3_l3_initiator_string(u8 initid)
80{
81 switch (initid) {
82 case OMAP_L3_LCD:
83 return "LCD";
84 case OMAP_L3_SAD2D:
85 return "SAD2D";
86 case OMAP_L3_IA_MPU_SS_1:
87 case OMAP_L3_IA_MPU_SS_2:
88 case OMAP_L3_IA_MPU_SS_3:
89 case OMAP_L3_IA_MPU_SS_4:
90 case OMAP_L3_IA_MPU_SS_5:
91 return "MPU";
92 case OMAP_L3_IA_IVA_SS_1:
93 case OMAP_L3_IA_IVA_SS_2:
94 case OMAP_L3_IA_IVA_SS_3:
95 return "IVA_SS";
96 case OMAP_L3_IA_IVA_SS_DMA_1:
97 case OMAP_L3_IA_IVA_SS_DMA_2:
98 case OMAP_L3_IA_IVA_SS_DMA_3:
99 case OMAP_L3_IA_IVA_SS_DMA_4:
100 case OMAP_L3_IA_IVA_SS_DMA_5:
101 case OMAP_L3_IA_IVA_SS_DMA_6:
102 return "IVA_SS_DMA";
103 case OMAP_L3_IA_SGX:
104 return "SGX";
105 case OMAP_L3_IA_CAM_1:
106 case OMAP_L3_IA_CAM_2:
107 case OMAP_L3_IA_CAM_3:
108 return "CAM";
109 case OMAP_L3_IA_DAP:
110 return "DAP";
111 case OMAP_L3_SDMA_WR_1:
112 case OMAP_L3_SDMA_WR_2:
113 return "SDMA_WR";
114 case OMAP_L3_SDMA_RD_1:
115 case OMAP_L3_SDMA_RD_2:
116 case OMAP_L3_SDMA_RD_3:
117 case OMAP_L3_SDMA_RD_4:
118 return "SDMA_RD";
119 case OMAP_L3_USBOTG:
120 return "USB_OTG";
121 case OMAP_L3_USBHOST:
122 return "USB_HOST";
123 default:
124 return "UNKNOWN Initiator";
125 }
126}
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139
140static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3,
141 u64 error, int error_addr)
142{
143 u8 code = omap3_l3_decode_error_code(error);
144 u8 initid = omap3_l3_decode_initid(error);
145 u8 multi = error & L3_ERROR_LOG_MULTI;
146 u32 address = omap3_l3_decode_addr(error_addr);
147
148 pr_err("%s seen by %s %s at address %x\n",
149 omap3_l3_code_string(code),
150 omap3_l3_initiator_string(initid),
151 multi ? "Multiple Errors" : "", address);
152 WARN_ON(1);
153
154 return IRQ_HANDLED;
155}
156
157static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
158{
159 struct omap3_l3 *l3 = _l3;
160 u64 status, clear;
161 u64 error;
162 u64 error_addr;
163 u64 err_source = 0;
164 void __iomem *base;
165 int int_type;
166 irqreturn_t ret = IRQ_NONE;
167
168 int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
169 if (!int_type) {
170 status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0);
171
172
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174
175
176
177 BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK);
178 } else {
179 status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1);
180
181 }
182
183
184 err_source = __ffs(status);
185
186 base = l3->rt + omap3_l3_bases[int_type][err_source];
187 error = omap3_l3_readll(base, L3_ERROR_LOG);
188 if (error) {
189 error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR);
190 ret |= omap3_l3_block_irq(l3, error, error_addr);
191 }
192
193
194 clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) |
195 L3_AGENT_STATUS_CLEAR_TA;
196 omap3_l3_writell(base, L3_AGENT_STATUS, clear);
197
198
199 omap3_l3_writell(base, L3_ERROR_LOG, error);
200
201 return ret;
202}
203
204#if IS_BUILTIN(CONFIG_OF)
205static const struct of_device_id omap3_l3_match[] = {
206 {
207 .compatible = "ti,omap3-l3-smx",
208 },
209 { },
210};
211MODULE_DEVICE_TABLE(of, omap3_l3_match);
212#endif
213
214static int omap3_l3_probe(struct platform_device *pdev)
215{
216 struct omap3_l3 *l3;
217 struct resource *res;
218 int ret;
219
220 l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
221 if (!l3)
222 return -ENOMEM;
223
224 platform_set_drvdata(pdev, l3);
225
226 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
227 if (!res) {
228 dev_err(&pdev->dev, "couldn't find resource\n");
229 ret = -ENODEV;
230 goto err0;
231 }
232 l3->rt = ioremap(res->start, resource_size(res));
233 if (!l3->rt) {
234 dev_err(&pdev->dev, "ioremap failed\n");
235 ret = -ENOMEM;
236 goto err0;
237 }
238
239 l3->debug_irq = platform_get_irq(pdev, 0);
240 ret = request_irq(l3->debug_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING,
241 "l3-debug-irq", l3);
242 if (ret) {
243 dev_err(&pdev->dev, "couldn't request debug irq\n");
244 goto err1;
245 }
246
247 l3->app_irq = platform_get_irq(pdev, 1);
248 ret = request_irq(l3->app_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING,
249 "l3-app-irq", l3);
250 if (ret) {
251 dev_err(&pdev->dev, "couldn't request app irq\n");
252 goto err2;
253 }
254
255 return 0;
256
257err2:
258 free_irq(l3->debug_irq, l3);
259err1:
260 iounmap(l3->rt);
261err0:
262 kfree(l3);
263 return ret;
264}
265
266static int omap3_l3_remove(struct platform_device *pdev)
267{
268 struct omap3_l3 *l3 = platform_get_drvdata(pdev);
269
270 free_irq(l3->app_irq, l3);
271 free_irq(l3->debug_irq, l3);
272 iounmap(l3->rt);
273 kfree(l3);
274
275 return 0;
276}
277
278static struct platform_driver omap3_l3_driver = {
279 .probe = omap3_l3_probe,
280 .remove = omap3_l3_remove,
281 .driver = {
282 .name = "omap_l3_smx",
283 .of_match_table = of_match_ptr(omap3_l3_match),
284 },
285};
286
287static int __init omap3_l3_init(void)
288{
289 return platform_driver_register(&omap3_l3_driver);
290}
291postcore_initcall_sync(omap3_l3_init);
292
293static void __exit omap3_l3_exit(void)
294{
295 platform_driver_unregister(&omap3_l3_driver);
296}
297module_exit(omap3_l3_exit);
298
299MODULE_AUTHOR("Felipe Balbi");
300MODULE_AUTHOR("Santosh Shilimkar");
301MODULE_AUTHOR("Sricharan R");
302MODULE_DESCRIPTION("OMAP3XXX L3 Interconnect Driver");
303MODULE_LICENSE("GPL");
304
