Commit | Line | Data |
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ed0e3520 | 1 | /* |
2 | * OMAP3XXX L3 Interconnect Driver | |
3 | * | |
4 | * Copyright (C) 2011 Texas Corporation | |
5 | * Felipe Balbi <balbi@ti.com> | |
6 | * Santosh Shilimkar <santosh.shilimkar@ti.com> | |
7 | * Sricharan <r.sricharan@ti.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 as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | */ | |
e2fa61d4 FB |
24 | |
25 | #include <linux/kernel.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/platform_device.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/io.h> | |
30 | #include "omap_l3_smx.h" | |
31 | ||
32 | static inline u64 omap3_l3_readll(void __iomem *base, u16 reg) | |
33 | { | |
34 | return __raw_readll(base + reg); | |
35 | } | |
36 | ||
37 | static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value) | |
38 | { | |
39 | __raw_writell(value, base + reg); | |
40 | } | |
41 | ||
42 | static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error) | |
43 | { | |
44 | return (error & 0x0f000000) >> L3_ERROR_LOG_CODE; | |
45 | } | |
46 | ||
47 | static inline u32 omap3_l3_decode_addr(u64 error_addr) | |
48 | { | |
49 | return error_addr & 0xffffffff; | |
50 | } | |
51 | ||
52 | static inline unsigned omap3_l3_decode_cmd(u64 error) | |
53 | { | |
54 | return (error & 0x07) >> L3_ERROR_LOG_CMD; | |
55 | } | |
56 | ||
57 | static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error) | |
58 | { | |
59 | return (error & 0xff00) >> L3_ERROR_LOG_INITID; | |
60 | } | |
61 | ||
62 | static inline unsigned omap3_l3_decode_req_info(u64 error) | |
63 | { | |
64 | return (error >> 32) & 0xffff; | |
65 | } | |
66 | ||
67 | static char *omap3_l3_code_string(u8 code) | |
68 | { | |
69 | switch (code) { | |
70 | case OMAP_L3_CODE_NOERROR: | |
71 | return "No Error"; | |
72 | case OMAP_L3_CODE_UNSUP_CMD: | |
73 | return "Unsupported Command"; | |
74 | case OMAP_L3_CODE_ADDR_HOLE: | |
75 | return "Address Hole"; | |
76 | case OMAP_L3_CODE_PROTECT_VIOLATION: | |
77 | return "Protection Violation"; | |
78 | case OMAP_L3_CODE_IN_BAND_ERR: | |
79 | return "In-band Error"; | |
80 | case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT: | |
81 | return "Request Timeout Not Accepted"; | |
82 | case OMAP_L3_CODE_REQ_TOUT_NO_RESP: | |
83 | return "Request Timeout, no response"; | |
84 | default: | |
85 | return "UNKNOWN error"; | |
86 | } | |
87 | } | |
88 | ||
89 | static char *omap3_l3_initiator_string(u8 initid) | |
90 | { | |
91 | switch (initid) { | |
92 | case OMAP_L3_LCD: | |
93 | return "LCD"; | |
94 | case OMAP_L3_SAD2D: | |
95 | return "SAD2D"; | |
96 | case OMAP_L3_IA_MPU_SS_1: | |
97 | case OMAP_L3_IA_MPU_SS_2: | |
98 | case OMAP_L3_IA_MPU_SS_3: | |
99 | case OMAP_L3_IA_MPU_SS_4: | |
100 | case OMAP_L3_IA_MPU_SS_5: | |
101 | return "MPU"; | |
102 | case OMAP_L3_IA_IVA_SS_1: | |
103 | case OMAP_L3_IA_IVA_SS_2: | |
104 | case OMAP_L3_IA_IVA_SS_3: | |
105 | return "IVA_SS"; | |
106 | case OMAP_L3_IA_IVA_SS_DMA_1: | |
107 | case OMAP_L3_IA_IVA_SS_DMA_2: | |
108 | case OMAP_L3_IA_IVA_SS_DMA_3: | |
109 | case OMAP_L3_IA_IVA_SS_DMA_4: | |
110 | case OMAP_L3_IA_IVA_SS_DMA_5: | |
111 | case OMAP_L3_IA_IVA_SS_DMA_6: | |
112 | return "IVA_SS_DMA"; | |
113 | case OMAP_L3_IA_SGX: | |
114 | return "SGX"; | |
115 | case OMAP_L3_IA_CAM_1: | |
116 | case OMAP_L3_IA_CAM_2: | |
117 | case OMAP_L3_IA_CAM_3: | |
118 | return "CAM"; | |
119 | case OMAP_L3_IA_DAP: | |
120 | return "DAP"; | |
121 | case OMAP_L3_SDMA_WR_1: | |
122 | case OMAP_L3_SDMA_WR_2: | |
123 | return "SDMA_WR"; | |
124 | case OMAP_L3_SDMA_RD_1: | |
125 | case OMAP_L3_SDMA_RD_2: | |
126 | case OMAP_L3_SDMA_RD_3: | |
127 | case OMAP_L3_SDMA_RD_4: | |
128 | return "SDMA_RD"; | |
129 | case OMAP_L3_USBOTG: | |
130 | return "USB_OTG"; | |
131 | case OMAP_L3_USBHOST: | |
132 | return "USB_HOST"; | |
133 | default: | |
134 | return "UNKNOWN Initiator"; | |
135 | } | |
136 | } | |
137 | ||
ed0e3520 | 138 | /* |
e2fa61d4 FB |
139 | * omap3_l3_block_irq - handles a register block's irq |
140 | * @l3: struct omap3_l3 * | |
141 | * @base: register block base address | |
142 | * @error: L3_ERROR_LOG register of our block | |
143 | * | |
144 | * Called in hard-irq context. Caller should take care of locking | |
145 | * | |
146 | * OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error | |
147 | * Analysis Sequence, we are following that sequence here, please | |
148 | * refer to that Figure for more information on the subject. | |
149 | */ | |
150 | static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3, | |
151 | u64 error, int error_addr) | |
152 | { | |
ed0e3520 | 153 | u8 code = omap3_l3_decode_error_code(error); |
154 | u8 initid = omap3_l3_decode_initid(error); | |
155 | u8 multi = error & L3_ERROR_LOG_MULTI; | |
156 | u32 address = omap3_l3_decode_addr(error_addr); | |
e2fa61d4 | 157 | |
00d6bfaf | 158 | pr_err("%s seen by %s %s at address %x\n", |
ed0e3520 | 159 | omap3_l3_code_string(code), |
160 | omap3_l3_initiator_string(initid), | |
161 | multi ? "Multiple Errors" : "", address); | |
00d6bfaf | 162 | WARN_ON(1); |
e2fa61d4 FB |
163 | |
164 | return IRQ_HANDLED; | |
165 | } | |
166 | ||
167 | static irqreturn_t omap3_l3_app_irq(int irq, void *_l3) | |
168 | { | |
ed0e3520 | 169 | struct omap3_l3 *l3 = _l3; |
170 | u64 status, clear; | |
171 | u64 error; | |
172 | u64 error_addr; | |
173 | u64 err_source = 0; | |
174 | void __iomem *base; | |
175 | int int_type; | |
176 | irqreturn_t ret = IRQ_NONE; | |
e2fa61d4 | 177 | |
35f7b961 | 178 | int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR; |
e2fa61d4 FB |
179 | if (!int_type) { |
180 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0); | |
181 | /* | |
182 | * if we have a timeout error, there's nothing we can | |
183 | * do besides rebooting the board. So let's BUG on any | |
184 | * of such errors and handle the others. timeout error | |
185 | * is severe and not expected to occur. | |
186 | */ | |
187 | BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK); | |
188 | } else { | |
189 | status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1); | |
190 | /* No timeout error for debug sources */ | |
191 | } | |
192 | ||
e2fa61d4 | 193 | /* identify the error source */ |
342fd144 | 194 | err_source = __ffs(status); |
bc16b377 | 195 | |
342fd144 | 196 | base = l3->rt + omap3_l3_bases[int_type][err_source]; |
e2fa61d4 | 197 | error = omap3_l3_readll(base, L3_ERROR_LOG); |
e2fa61d4 FB |
198 | if (error) { |
199 | error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR); | |
e2fa61d4 FB |
200 | ret |= omap3_l3_block_irq(l3, error, error_addr); |
201 | } | |
202 | ||
203 | /* Clear the status register */ | |
35f7b961 | 204 | clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) | |
205 | L3_AGENT_STATUS_CLEAR_TA; | |
e2fa61d4 FB |
206 | omap3_l3_writell(base, L3_AGENT_STATUS, clear); |
207 | ||
208 | /* clear the error log register */ | |
209 | omap3_l3_writell(base, L3_ERROR_LOG, error); | |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | static int __init omap3_l3_probe(struct platform_device *pdev) | |
215 | { | |
ed0e3520 | 216 | struct omap3_l3 *l3; |
217 | struct resource *res; | |
218 | int ret; | |
e2fa61d4 FB |
219 | |
220 | l3 = kzalloc(sizeof(*l3), GFP_KERNEL); | |
7529b703 | 221 | if (!l3) |
222 | return -ENOMEM; | |
e2fa61d4 FB |
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; | |
7529b703 | 230 | goto err0; |
e2fa61d4 FB |
231 | } |
232 | l3->rt = ioremap(res->start, resource_size(res)); | |
35f7b961 | 233 | if (!l3->rt) { |
e2fa61d4 FB |
234 | dev_err(&pdev->dev, "ioremap failed\n"); |
235 | ret = -ENOMEM; | |
7529b703 | 236 | goto err0; |
e2fa61d4 FB |
237 | } |
238 | ||
18a81019 AK |
239 | l3->debug_irq = platform_get_irq(pdev, 0); |
240 | ret = request_irq(l3->debug_irq, omap3_l3_app_irq, | |
e2fa61d4 FB |
241 | IRQF_DISABLED | IRQF_TRIGGER_RISING, |
242 | "l3-debug-irq", l3); | |
243 | if (ret) { | |
244 | dev_err(&pdev->dev, "couldn't request debug irq\n"); | |
7529b703 | 245 | goto err1; |
e2fa61d4 | 246 | } |
e2fa61d4 | 247 | |
18a81019 AK |
248 | l3->app_irq = platform_get_irq(pdev, 1); |
249 | ret = request_irq(l3->app_irq, omap3_l3_app_irq, | |
e2fa61d4 FB |
250 | IRQF_DISABLED | IRQF_TRIGGER_RISING, |
251 | "l3-app-irq", l3); | |
e2fa61d4 FB |
252 | if (ret) { |
253 | dev_err(&pdev->dev, "couldn't request app irq\n"); | |
7529b703 | 254 | goto err2; |
e2fa61d4 FB |
255 | } |
256 | ||
7529b703 | 257 | return 0; |
e2fa61d4 | 258 | |
e2fa61d4 | 259 | err2: |
7529b703 | 260 | free_irq(l3->debug_irq, l3); |
e2fa61d4 | 261 | err1: |
7529b703 | 262 | iounmap(l3->rt); |
e2fa61d4 | 263 | err0: |
7529b703 | 264 | kfree(l3); |
e2fa61d4 FB |
265 | return ret; |
266 | } | |
267 | ||
268 | static int __exit omap3_l3_remove(struct platform_device *pdev) | |
269 | { | |
270 | struct omap3_l3 *l3 = platform_get_drvdata(pdev); | |
271 | ||
272 | free_irq(l3->app_irq, l3); | |
273 | free_irq(l3->debug_irq, l3); | |
274 | iounmap(l3->rt); | |
275 | kfree(l3); | |
276 | ||
277 | return 0; | |
278 | } | |
279 | ||
280 | static struct platform_driver omap3_l3_driver = { | |
281 | .remove = __exit_p(omap3_l3_remove), | |
282 | .driver = { | |
283 | .name = "omap_l3_smx", | |
284 | }, | |
285 | }; | |
286 | ||
287 | static int __init omap3_l3_init(void) | |
288 | { | |
289 | return platform_driver_probe(&omap3_l3_driver, omap3_l3_probe); | |
290 | } | |
291 | postcore_initcall_sync(omap3_l3_init); | |
292 | ||
293 | static void __exit omap3_l3_exit(void) | |
294 | { | |
295 | platform_driver_unregister(&omap3_l3_driver); | |
296 | } | |
297 | module_exit(omap3_l3_exit); |