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7#include <linux/bitops.h>
8#include <linux/clk.h>
9#include <linux/err.h>
10#include <linux/interrupt.h>
11#include <linux/io.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/remoteproc.h>
15
16#include "remoteproc_internal.h"
17
18#define REG_AUX_CTRL 0x0
19#define REG_AUX_MSG_ACK 0x10
20#define REG_AUX_MSG 0x14
21#define REG_CORE_MSG_ACK 0x18
22#define REG_CORE_MSG 0x1C
23
24#define AUX_CTRL_SLEEP BIT(31)
25#define AUX_CTRL_MSG_IRQ_EN BIT(3)
26#define AUX_CTRL_NMI_RESETS BIT(2)
27#define AUX_CTRL_NMI BIT(1)
28#define AUX_CTRL_SW_RESET BIT(0)
29
30static bool auto_boot;
31module_param(auto_boot, bool, 0400);
32MODULE_PARM_DESC(auto_boot,
33 "Auto-boot the remote processor [default=false]");
34
35struct vpu_mem_map {
36 const char *name;
37 unsigned int da;
38};
39
40struct vpu_mem_info {
41 const struct vpu_mem_map *map;
42 unsigned long len;
43 void __iomem *base;
44};
45
46static const struct vpu_mem_map vpu_mem_map[] = {
47 { "tcsm0", 0x132b0000 },
48 { "tcsm1", 0xf4000000 },
49 { "sram", 0x132f0000 },
50};
51
52
53
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57
58
59
60
61struct vpu {
62 int irq;
63 struct clk_bulk_data clks[2];
64 void __iomem *aux_base;
65 struct vpu_mem_info mem_info[ARRAY_SIZE(vpu_mem_map)];
66 struct device *dev;
67};
68
69static int ingenic_rproc_prepare(struct rproc *rproc)
70{
71 struct vpu *vpu = rproc->priv;
72 int ret;
73
74
75 ret = clk_bulk_prepare_enable(ARRAY_SIZE(vpu->clks), vpu->clks);
76 if (ret)
77 dev_err(vpu->dev, "Unable to start clocks: %d\n", ret);
78
79 return ret;
80}
81
82static int ingenic_rproc_unprepare(struct rproc *rproc)
83{
84 struct vpu *vpu = rproc->priv;
85
86 clk_bulk_disable_unprepare(ARRAY_SIZE(vpu->clks), vpu->clks);
87
88 return 0;
89}
90
91static int ingenic_rproc_start(struct rproc *rproc)
92{
93 struct vpu *vpu = rproc->priv;
94 u32 ctrl;
95
96 enable_irq(vpu->irq);
97
98
99 ctrl = AUX_CTRL_NMI_RESETS | AUX_CTRL_NMI | AUX_CTRL_MSG_IRQ_EN;
100 writel(ctrl, vpu->aux_base + REG_AUX_CTRL);
101
102 return 0;
103}
104
105static int ingenic_rproc_stop(struct rproc *rproc)
106{
107 struct vpu *vpu = rproc->priv;
108
109 disable_irq(vpu->irq);
110
111
112 writel(AUX_CTRL_SW_RESET, vpu->aux_base + REG_AUX_CTRL);
113
114 return 0;
115}
116
117static void ingenic_rproc_kick(struct rproc *rproc, int vqid)
118{
119 struct vpu *vpu = rproc->priv;
120
121 writel(vqid, vpu->aux_base + REG_CORE_MSG);
122}
123
124static void *ingenic_rproc_da_to_va(struct rproc *rproc, u64 da, size_t len, bool *is_iomem)
125{
126 struct vpu *vpu = rproc->priv;
127 void __iomem *va = NULL;
128 unsigned int i;
129
130 for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
131 const struct vpu_mem_info *info = &vpu->mem_info[i];
132 const struct vpu_mem_map *map = info->map;
133
134 if (da >= map->da && (da + len) < (map->da + info->len)) {
135 va = info->base + (da - map->da);
136 break;
137 }
138 }
139
140 return (__force void *)va;
141}
142
143static const struct rproc_ops ingenic_rproc_ops = {
144 .prepare = ingenic_rproc_prepare,
145 .unprepare = ingenic_rproc_unprepare,
146 .start = ingenic_rproc_start,
147 .stop = ingenic_rproc_stop,
148 .kick = ingenic_rproc_kick,
149 .da_to_va = ingenic_rproc_da_to_va,
150};
151
152static irqreturn_t vpu_interrupt(int irq, void *data)
153{
154 struct rproc *rproc = data;
155 struct vpu *vpu = rproc->priv;
156 u32 vring;
157
158 vring = readl(vpu->aux_base + REG_AUX_MSG);
159
160
161 writel(0, vpu->aux_base + REG_AUX_MSG_ACK);
162
163 return rproc_vq_interrupt(rproc, vring);
164}
165
166static int ingenic_rproc_probe(struct platform_device *pdev)
167{
168 struct device *dev = &pdev->dev;
169 struct resource *mem;
170 struct rproc *rproc;
171 struct vpu *vpu;
172 unsigned int i;
173 int ret;
174
175 rproc = devm_rproc_alloc(dev, "ingenic-vpu",
176 &ingenic_rproc_ops, NULL, sizeof(*vpu));
177 if (!rproc)
178 return -ENOMEM;
179
180 rproc->auto_boot = auto_boot;
181
182 vpu = rproc->priv;
183 vpu->dev = &pdev->dev;
184 platform_set_drvdata(pdev, vpu);
185
186 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aux");
187 vpu->aux_base = devm_ioremap_resource(dev, mem);
188 if (IS_ERR(vpu->aux_base)) {
189 dev_err(dev, "Failed to ioremap\n");
190 return PTR_ERR(vpu->aux_base);
191 }
192
193 for (i = 0; i < ARRAY_SIZE(vpu_mem_map); i++) {
194 mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,
195 vpu_mem_map[i].name);
196
197 vpu->mem_info[i].base = devm_ioremap_resource(dev, mem);
198 if (IS_ERR(vpu->mem_info[i].base)) {
199 ret = PTR_ERR(vpu->mem_info[i].base);
200 dev_err(dev, "Failed to ioremap\n");
201 return ret;
202 }
203
204 vpu->mem_info[i].len = resource_size(mem);
205 vpu->mem_info[i].map = &vpu_mem_map[i];
206 }
207
208 vpu->clks[0].id = "vpu";
209 vpu->clks[1].id = "aux";
210
211 ret = devm_clk_bulk_get(dev, ARRAY_SIZE(vpu->clks), vpu->clks);
212 if (ret) {
213 dev_err(dev, "Failed to get clocks\n");
214 return ret;
215 }
216
217 vpu->irq = platform_get_irq(pdev, 0);
218 if (vpu->irq < 0)
219 return vpu->irq;
220
221 ret = devm_request_irq(dev, vpu->irq, vpu_interrupt, 0, "VPU", rproc);
222 if (ret < 0) {
223 dev_err(dev, "Failed to request IRQ\n");
224 return ret;
225 }
226
227 disable_irq(vpu->irq);
228
229 ret = devm_rproc_add(dev, rproc);
230 if (ret) {
231 dev_err(dev, "Failed to register remote processor\n");
232 return ret;
233 }
234
235 return 0;
236}
237
238static const struct of_device_id ingenic_rproc_of_matches[] = {
239 { .compatible = "ingenic,jz4770-vpu-rproc", },
240 {}
241};
242MODULE_DEVICE_TABLE(of, ingenic_rproc_of_matches);
243
244static struct platform_driver ingenic_rproc_driver = {
245 .probe = ingenic_rproc_probe,
246 .driver = {
247 .name = "ingenic-vpu",
248 .of_match_table = ingenic_rproc_of_matches,
249 },
250};
251module_platform_driver(ingenic_rproc_driver);
252
253MODULE_LICENSE("GPL");
254MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
255MODULE_DESCRIPTION("Ingenic JZ47xx Remote Processor control driver");
256
