aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-omap2/omap_l3_smx.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-omap2/omap_l3_smx.c')
-rw-r--r--arch/arm/mach-omap2/omap_l3_smx.c297
1 files changed, 0 insertions, 297 deletions
diff --git a/arch/arm/mach-omap2/omap_l3_smx.c b/arch/arm/mach-omap2/omap_l3_smx.c
deleted file mode 100644
index acc216491b8a..000000000000
--- a/arch/arm/mach-omap2/omap_l3_smx.c
+++ /dev/null
@@ -1,297 +0,0 @@
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 */
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
32static inline u64 omap3_l3_readll(void __iomem *base, u16 reg)
33{
34 return __raw_readll(base + reg);
35}
36
37static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value)
38{
39 __raw_writell(value, base + reg);
40}
41
42static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error)
43{
44 return (error & 0x0f000000) >> L3_ERROR_LOG_CODE;
45}
46
47static inline u32 omap3_l3_decode_addr(u64 error_addr)
48{
49 return error_addr & 0xffffffff;
50}
51
52static inline unsigned omap3_l3_decode_cmd(u64 error)
53{
54 return (error & 0x07) >> L3_ERROR_LOG_CMD;
55}
56
57static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error)
58{
59 return (error & 0xff00) >> L3_ERROR_LOG_INITID;
60}
61
62static inline unsigned omap3_l3_decode_req_info(u64 error)
63{
64 return (error >> 32) & 0xffff;
65}
66
67static 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
89static 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
138/*
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 */
150static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3,
151 u64 error, int error_addr)
152{
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);
157
158 pr_err("%s seen by %s %s at address %x\n",
159 omap3_l3_code_string(code),
160 omap3_l3_initiator_string(initid),
161 multi ? "Multiple Errors" : "", address);
162 WARN_ON(1);
163
164 return IRQ_HANDLED;
165}
166
167static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
168{
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;
177
178 int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
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
193 /* identify the error source */
194 err_source = __ffs(status);
195
196 base = l3->rt + omap3_l3_bases[int_type][err_source];
197 error = omap3_l3_readll(base, L3_ERROR_LOG);
198 if (error) {
199 error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR);
200 ret |= omap3_l3_block_irq(l3, error, error_addr);
201 }
202
203 /* Clear the status register */
204 clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) |
205 L3_AGENT_STATUS_CLEAR_TA;
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
214static int __init 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,
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");
245 goto err1;
246 }
247
248 l3->app_irq = platform_get_irq(pdev, 1);
249 ret = request_irq(l3->app_irq, omap3_l3_app_irq,
250 IRQF_DISABLED | IRQF_TRIGGER_RISING,
251 "l3-app-irq", l3);
252 if (ret) {
253 dev_err(&pdev->dev, "couldn't request app irq\n");
254 goto err2;
255 }
256
257 return 0;
258
259err2:
260 free_irq(l3->debug_irq, l3);
261err1:
262 iounmap(l3->rt);
263err0:
264 kfree(l3);
265 return ret;
266}
267
268static 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
280static struct platform_driver omap3_l3_driver = {
281 .remove = __exit_p(omap3_l3_remove),
282 .driver = {
283 .name = "omap_l3_smx",
284 },
285};
286
287static int __init omap3_l3_init(void)
288{
289 return platform_driver_probe(&omap3_l3_driver, omap3_l3_probe);
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);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 07:47:55 -0500