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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ed0e3520 | 2 | /* |
3 | * OMAP3XXX L3 Interconnect Driver | |
4 | * | |
5 | * Copyright (C) 2011 Texas Corporation | |
6 | * Felipe Balbi <balbi@ti.com> | |
7 | * Santosh Shilimkar <santosh.shilimkar@ti.com> | |
8 | * Sricharan <r.sricharan@ti.com> | |
ed0e3520 | 9 | */ |
e2fa61d4 FB |
10 | |
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> | |
aa25729c TL |
16 | #include <linux/module.h> |
17 | #include <linux/of.h> | |
aa25729c | 18 | |
e2fa61d4 FB |
19 | #include "omap_l3_smx.h" |
20 | ||
21 | static inline u64 omap3_l3_readll(void __iomem *base, u16 reg) | |
22 | { | |
23 | return __raw_readll(base + reg); | |
24 | } | |
25 | ||
26 | static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value) | |
27 | { | |
28 | __raw_writell(value, base + reg); | |
29 | } | |
30 | ||
31 | static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error) | |
32 | { | |
33 | return (error & 0x0f000000) >> L3_ERROR_LOG_CODE; | |
34 | } | |
35 | ||
36 | static inline u32 omap3_l3_decode_addr(u64 error_addr) | |
37 | { | |
38 | return error_addr & 0xffffffff; | |
39 | } | |
40 | ||
41 | static inline unsigned omap3_l3_decode_cmd(u64 error) | |
42 | { | |
43 | return (error & 0x07) >> L3_ERROR_LOG_CMD; | |
44 | } | |
45 | ||
46 | static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error) | |
47 | { | |
48 | return (error & 0xff00) >> L3_ERROR_LOG_INITID; | |
49 | } | |
50 | ||
51 | static inline unsigned omap3_l3_decode_req_info(u64 error) | |
52 | { | |
53 | return (error >> 32) & 0xffff; | |
54 | } | |
55 | ||
56 | static char *omap3_l3_code_string(u8 code) | |
57 | { | |
58 | switch (code) { | |
59 | case OMAP_L3_CODE_NOERROR: | |
60 | return "No Error"; | |
61 | case OMAP_L3_CODE_UNSUP_CMD: | |
62 | return "Unsupported Command"; | |
63 | case OMAP_L3_CODE_ADDR_HOLE: | |
64 | return "Address Hole"; | |
65 | case OMAP_L3_CODE_PROTECT_VIOLATION: | |
66 | return "Protection Violation"; | |
67 | case OMAP_L3_CODE_IN_BAND_ERR: | |
68 | return "In-band Error"; | |
69 | case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT: | |
70 | return "Request Timeout Not Accepted"; | |
71 | case OMAP_L3_CODE_REQ_TOUT_NO_RESP: | |
72 | return "Request Timeout, no response"; | |
73 | default: | |
74 | return "UNKNOWN error"; | |
75 | } | |
76 | } | |
77 | ||
78 | static char *omap3_l3_initiator_string(u8 initid) | |
79 | { | |
80 | switch (initid) { | |
81 | case OMAP_L3_LCD: | |
82 | return "LCD"; | |
83 | case OMAP_L3_SAD2D: | |
84 | return "SAD2D"; | |
85 | case OMAP_L3_IA_MPU_SS_1: | |
86 | case OMAP_L3_IA_MPU_SS_2: | |
87 | case OMAP_L3_IA_MPU_SS_3: | |
88 | case OMAP_L3_IA_MPU_SS_4: | |
89 | case OMAP_L3_IA_MPU_SS_5: | |
90 | return "MPU"; | |
91 | case OMAP_L3_IA_IVA_SS_1: | |
92 | case OMAP_L3_IA_IVA_SS_2: | |
93 | case OMAP_L3_IA_IVA_SS_3: | |
94 | return "IVA_SS"; | |
95 | case OMAP_L3_IA_IVA_SS_DMA_1: | |
96 | case OMAP_L3_IA_IVA_SS_DMA_2: | |
97 | case OMAP_L3_IA_IVA_SS_DMA_3: | |
98 | case OMAP_L3_IA_IVA_SS_DMA_4: | |
99 | case OMAP_L3_IA_IVA_SS_DMA_5: | |
100 | case OMAP_L3_IA_IVA_SS_DMA_6: | |
101 | return "IVA_SS_DMA"; | |
102 | case OMAP_L3_IA_SGX: | |
103 | return "SGX"; | |
104 | case OMAP_L3_IA_CAM_1: | |
105 | case OMAP_L3_IA_CAM_2: | |
106 | case OMAP_L3_IA_CAM_3: | |
107 | return "CAM"; | |
108 | case OMAP_L3_IA_DAP: | |
109 | return "DAP"; | |
110 | case OMAP_L3_SDMA_WR_1: | |
111 | case OMAP_L3_SDMA_WR_2: | |
112 | return "SDMA_WR"; | |
113 | case OMAP_L3_SDMA_RD_1: | |
114 | case OMAP_L3_SDMA_RD_2: | |
115 | case OMAP_L3_SDMA_RD_3: | |
116 | case OMAP_L3_SDMA_RD_4: | |
117 | return "SDMA_RD"; | |
118 | case OMAP_L3_USBOTG: | |
119 | return "USB_OTG"; | |
120 | case OMAP_L3_USBHOST: | |
121 | return "USB_HOST"; | |
122 | default: | |
123 | return "UNKNOWN Initiator"; | |
124 | } | |
125 | } | |
126 | ||
ed0e3520 | 127 | /* |
e2fa61d4 FB |
128 | * omap3_l3_block_irq - handles a register block's irq |
129 | * @l3: struct omap3_l3 * | |
130 | * @base: register block base address | |
131 | * @error: L3_ERROR_LOG register of our block | |
132 | * | |
133 | * Called in hard-irq context. Caller should take care of locking | |
134 | * | |
135 | * OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error | |
136 | * Analysis Sequence, we are following that sequence here, please | |
137 | * refer to that Figure for more information on the subject. | |
138 | */ | |
139 | static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3, | |
140 | u64 error, int error_addr) | |
141 | { | |
ed0e3520 | 142 | u8 code = omap3_l3_decode_error_code(error); |
143 | u8 initid = omap3_l3_decode_initid(error); | |
144 | u8 multi = error & L3_ERROR_LOG_MULTI; | |
145 | u32 address = omap3_l3_decode_addr(error_addr); | |
e2fa61d4 | 146 | |
00d6bfaf | 147 | pr_err("%s seen by %s %s at address %x\n", |
ed0e3520 | 148 | omap3_l3_code_string(code), |
149 | omap3_l3_initiator_string(initid), | |
150 | multi ? "Multiple Errors" : "", address); | |
00d6bfaf | 151 | WARN_ON(1); |
e2fa61d4 FB |
152 | |
153 | return IRQ_HANDLED; | |
154 | } | |
155 | ||
156 | static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) | |
157 | { | |
ed0e3520 | 158 | struct omap3_l3 *l3 = _l3; |
159 | u64 status, clear; | |
160 | u64 error; | |
161 | u64 error_addr; | |
162 | u64 err_source = 0; | |
163 | void __iomem *base; | |
164 | int int_type; | |
165 | irqreturn_t ret = IRQ_NONE; | |
e2fa61d4 | 166 | |
35f7b961 | 167 | int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR; |
99f13d7a | 168 | if (!int_type) |
e2fa61d4 | 169 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); |
99f13d7a | 170 | else |
e2fa61d4 | 171 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); |
e2fa61d4 | 172 | |
e2fa61d4 | 173 | /* identify the error source */ |
342fd144 | 174 | err_source = __ffs(status); |
bc16b377 | 175 | |
342fd144 | 176 | base = l3->rt + omap3_l3_bases[int_type][err_source]; |
e2fa61d4 | 177 | error = omap3_l3_readll(base, L3_ERROR_LOG); |
e2fa61d4 FB |
178 | if (error) { |
179 | error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR); | |
e2fa61d4 FB |
180 | ret |= omap3_l3_block_irq(l3, error, error_addr); |
181 | } | |
182 | ||
99f13d7a SM |
183 | /* |
184 | * if we have a timeout error, there's nothing we can | |
185 | * do besides rebooting the board. So let's BUG on any | |
186 | * of such errors and handle the others. timeout error | |
187 | * is severe and not expected to occur. | |
188 | */ | |
189 | BUG_ON(!int_type && status & L3_STATUS_0_TIMEOUT_MASK); | |
190 | ||
e2fa61d4 | 191 | /* Clear the status register */ |
35f7b961 | 192 | clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) | |
193 | L3_AGENT_STATUS_CLEAR_TA; | |
e2fa61d4 FB |
194 | omap3_l3_writell(base, L3_AGENT_STATUS, clear); |
195 | ||
196 | /* clear the error log register */ | |
197 | omap3_l3_writell(base, L3_ERROR_LOG, error); | |
198 | ||
199 | return ret; | |
200 | } | |
201 | ||
aa25729c TL |
202 | #if IS_BUILTIN(CONFIG_OF) |
203 | static const struct of_device_id omap3_l3_match[] = { | |
204 | { | |
205 | .compatible = "ti,omap3-l3-smx", | |
206 | }, | |
207 | { }, | |
208 | }; | |
209 | MODULE_DEVICE_TABLE(of, omap3_l3_match); | |
210 | #endif | |
211 | ||
212 | static int omap3_l3_probe(struct platform_device *pdev) | |
e2fa61d4 | 213 | { |
ed0e3520 | 214 | struct omap3_l3 *l3; |
215 | struct resource *res; | |
216 | int ret; | |
e2fa61d4 FB |
217 | |
218 | l3 = kzalloc(sizeof(*l3), GFP_KERNEL); | |
7529b703 | 219 | if (!l3) |
220 | return -ENOMEM; | |
e2fa61d4 FB |
221 | |
222 | platform_set_drvdata(pdev, l3); | |
223 | ||
224 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
225 | if (!res) { | |
226 | dev_err(&pdev->dev, "couldn't find resource\n"); | |
227 | ret = -ENODEV; | |
7529b703 | 228 | goto err0; |
e2fa61d4 FB |
229 | } |
230 | l3->rt = ioremap(res->start, resource_size(res)); | |
35f7b961 | 231 | if (!l3->rt) { |
e2fa61d4 FB |
232 | dev_err(&pdev->dev, "ioremap failed\n"); |
233 | ret = -ENOMEM; | |
7529b703 | 234 | goto err0; |
e2fa61d4 FB |
235 | } |
236 | ||
18a81019 | 237 | l3->debug_irq = platform_get_irq(pdev, 0); |
d8bf368d VR |
238 | ret = request_irq(l3->debug_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING, |
239 | "l3-debug-irq", l3); | |
e2fa61d4 FB |
240 | if (ret) { |
241 | dev_err(&pdev->dev, "couldn't request debug irq\n"); | |
7529b703 | 242 | goto err1; |
e2fa61d4 | 243 | } |
e2fa61d4 | 244 | |
18a81019 | 245 | l3->app_irq = platform_get_irq(pdev, 1); |
d8bf368d VR |
246 | ret = request_irq(l3->app_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING, |
247 | "l3-app-irq", l3); | |
e2fa61d4 FB |
248 | if (ret) { |
249 | dev_err(&pdev->dev, "couldn't request app irq\n"); | |
7529b703 | 250 | goto err2; |
e2fa61d4 FB |
251 | } |
252 | ||
7529b703 | 253 | return 0; |
e2fa61d4 | 254 | |
e2fa61d4 | 255 | err2: |
7529b703 | 256 | free_irq(l3->debug_irq, l3); |
e2fa61d4 | 257 | err1: |
7529b703 | 258 | iounmap(l3->rt); |
e2fa61d4 | 259 | err0: |
7529b703 | 260 | kfree(l3); |
e2fa61d4 FB |
261 | return ret; |
262 | } | |
263 | ||
8c7d255d | 264 | static void omap3_l3_remove(struct platform_device *pdev) |
e2fa61d4 FB |
265 | { |
266 | struct omap3_l3 *l3 = platform_get_drvdata(pdev); | |
267 | ||
268 | free_irq(l3->app_irq, l3); | |
269 | free_irq(l3->debug_irq, l3); | |
270 | iounmap(l3->rt); | |
271 | kfree(l3); | |
e2fa61d4 FB |
272 | } |
273 | ||
274 | static struct platform_driver omap3_l3_driver = { | |
aa25729c | 275 | .probe = omap3_l3_probe, |
8c7d255d | 276 | .remove_new = omap3_l3_remove, |
e2fa61d4 | 277 | .driver = { |
aa25729c TL |
278 | .name = "omap_l3_smx", |
279 | .of_match_table = of_match_ptr(omap3_l3_match), | |
e2fa61d4 FB |
280 | }, |
281 | }; | |
282 | ||
283 | static int __init omap3_l3_init(void) | |
284 | { | |
aa25729c | 285 | return platform_driver_register(&omap3_l3_driver); |
e2fa61d4 FB |
286 | } |
287 | postcore_initcall_sync(omap3_l3_init); | |
288 | ||
289 | static void __exit omap3_l3_exit(void) | |
290 | { | |
291 | platform_driver_unregister(&omap3_l3_driver); | |
292 | } | |
293 | module_exit(omap3_l3_exit); | |
be60566e AB |
294 | |
295 | MODULE_AUTHOR("Felipe Balbi"); | |
296 | MODULE_AUTHOR("Santosh Shilimkar"); | |
297 | MODULE_AUTHOR("Sricharan R"); | |
298 | MODULE_DESCRIPTION("OMAP3XXX L3 Interconnect Driver"); | |
299 | MODULE_LICENSE("GPL"); |