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23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/of_platform.h>
26#include <asm/io.h>
27
28#include "fsl_85xx_cache_ctlr.h"
29
30static char *sram_size;
31static char *sram_offset;
32struct mpc85xx_l2ctlr __iomem *l2ctlr;
33
34static int get_cache_sram_params(struct sram_parameters *sram_params)
35{
36 unsigned long long addr;
37 unsigned int size;
38
39 if (!sram_size || (kstrtouint(sram_size, 0, &size) < 0))
40 return -EINVAL;
41
42 if (!sram_offset || (kstrtoull(sram_offset, 0, &addr) < 0))
43 return -EINVAL;
44
45 sram_params->sram_offset = addr;
46 sram_params->sram_size = size;
47
48 return 0;
49}
50
51static int __init get_size_from_cmdline(char *str)
52{
53 if (!str)
54 return 0;
55
56 sram_size = str;
57 return 1;
58}
59
60static int __init get_offset_from_cmdline(char *str)
61{
62 if (!str)
63 return 0;
64
65 sram_offset = str;
66 return 1;
67}
68
69__setup("cache-sram-size=", get_size_from_cmdline);
70__setup("cache-sram-offset=", get_offset_from_cmdline);
71
72static int mpc85xx_l2ctlr_of_probe(struct platform_device *dev)
73{
74 long rval;
75 unsigned int rem;
76 unsigned char ways;
77 const unsigned int *prop;
78 unsigned int l2cache_size;
79 struct sram_parameters sram_params;
80
81 if (!dev->dev.of_node) {
82 dev_err(&dev->dev, "Device's OF-node is NULL\n");
83 return -EINVAL;
84 }
85
86 prop = of_get_property(dev->dev.of_node, "cache-size", NULL);
87 if (!prop) {
88 dev_err(&dev->dev, "Missing L2 cache-size\n");
89 return -EINVAL;
90 }
91 l2cache_size = *prop;
92
93 if (get_cache_sram_params(&sram_params)) {
94 dev_err(&dev->dev,
95 "Entire L2 as cache, provide valid sram offset and size\n");
96 return -EINVAL;
97 }
98
99
100 rem = l2cache_size % sram_params.sram_size;
101 ways = LOCK_WAYS_FULL * sram_params.sram_size / l2cache_size;
102 if (rem || (ways & (ways - 1))) {
103 dev_err(&dev->dev, "Illegal cache-sram-size in command line\n");
104 return -EINVAL;
105 }
106
107 l2ctlr = of_iomap(dev->dev.of_node, 0);
108 if (!l2ctlr) {
109 dev_err(&dev->dev, "Can't map L2 controller\n");
110 return -EINVAL;
111 }
112
113
114
115
116 out_be32(&l2ctlr->srbar0,
117 lower_32_bits(sram_params.sram_offset) & L2SRAM_BAR_MSK_LO18);
118
119
120
121
122#ifdef CONFIG_PHYS_64BIT
123 out_be32(&l2ctlr->srbarea0,
124 upper_32_bits(sram_params.sram_offset) & L2SRAM_BARE_MSK_HI4);
125#endif
126
127 clrsetbits_be32(&l2ctlr->ctl, L2CR_L2E, L2CR_L2FI);
128
129 switch (ways) {
130 case LOCK_WAYS_EIGHTH:
131 setbits32(&l2ctlr->ctl,
132 L2CR_L2E | L2CR_L2FI | L2CR_SRAM_EIGHTH);
133 break;
134
135 case LOCK_WAYS_TWO_EIGHTH:
136 setbits32(&l2ctlr->ctl,
137 L2CR_L2E | L2CR_L2FI | L2CR_SRAM_QUART);
138 break;
139
140 case LOCK_WAYS_HALF:
141 setbits32(&l2ctlr->ctl,
142 L2CR_L2E | L2CR_L2FI | L2CR_SRAM_HALF);
143 break;
144
145 case LOCK_WAYS_FULL:
146 default:
147 setbits32(&l2ctlr->ctl,
148 L2CR_L2E | L2CR_L2FI | L2CR_SRAM_FULL);
149 break;
150 }
151 eieio();
152
153 rval = instantiate_cache_sram(dev, sram_params);
154 if (rval < 0) {
155 dev_err(&dev->dev, "Can't instantiate Cache-SRAM\n");
156 iounmap(l2ctlr);
157 return -EINVAL;
158 }
159
160 return 0;
161}
162
163static int mpc85xx_l2ctlr_of_remove(struct platform_device *dev)
164{
165 BUG_ON(!l2ctlr);
166
167 iounmap(l2ctlr);
168 remove_cache_sram(dev);
169 dev_info(&dev->dev, "MPC85xx L2 controller unloaded\n");
170
171 return 0;
172}
173
174static struct of_device_id mpc85xx_l2ctlr_of_match[] = {
175 {
176 .compatible = "fsl,p2020-l2-cache-controller",
177 },
178 {
179 .compatible = "fsl,p2010-l2-cache-controller",
180 },
181 {
182 .compatible = "fsl,p1020-l2-cache-controller",
183 },
184 {
185 .compatible = "fsl,p1011-l2-cache-controller",
186 },
187 {
188 .compatible = "fsl,p1013-l2-cache-controller",
189 },
190 {
191 .compatible = "fsl,p1022-l2-cache-controller",
192 },
193 {
194 .compatible = "fsl,mpc8548-l2-cache-controller",
195 },
196 { .compatible = "fsl,mpc8544-l2-cache-controller",},
197 { .compatible = "fsl,mpc8572-l2-cache-controller",},
198 { .compatible = "fsl,mpc8536-l2-cache-controller",},
199 { .compatible = "fsl,p1021-l2-cache-controller",},
200 { .compatible = "fsl,p1012-l2-cache-controller",},
201 { .compatible = "fsl,p1025-l2-cache-controller",},
202 { .compatible = "fsl,p1016-l2-cache-controller",},
203 { .compatible = "fsl,p1024-l2-cache-controller",},
204 { .compatible = "fsl,p1015-l2-cache-controller",},
205 { .compatible = "fsl,p1010-l2-cache-controller",},
206 { .compatible = "fsl,bsc9131-l2-cache-controller",},
207 {},
208};
209
210static struct platform_driver mpc85xx_l2ctlr_of_platform_driver = {
211 .driver = {
212 .name = "fsl-l2ctlr",
213 .owner = THIS_MODULE,
214 .of_match_table = mpc85xx_l2ctlr_of_match,
215 },
216 .probe = mpc85xx_l2ctlr_of_probe,
217 .remove = mpc85xx_l2ctlr_of_remove,
218};
219
220static __init int mpc85xx_l2ctlr_of_init(void)
221{
222 return platform_driver_register(&mpc85xx_l2ctlr_of_platform_driver);
223}
224
225static void __exit mpc85xx_l2ctlr_of_exit(void)
226{
227 platform_driver_unregister(&mpc85xx_l2ctlr_of_platform_driver);
228}
229
230subsys_initcall(mpc85xx_l2ctlr_of_init);
231module_exit(mpc85xx_l2ctlr_of_exit);
232
233MODULE_DESCRIPTION("Freescale MPC85xx L2 controller init");
234MODULE_LICENSE("GPL v2");
235
