1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2015-2016 MediaTek Inc.
4 * Author: Yong Wu <yong.wu@mediatek.com>
5 */
6 #include <linux/arm-smccc.h>
7 #include <linux/clk.h>
8 #include <linux/component.h>
9 #include <linux/device.h>
10 #include <linux/err.h>
11 #include <linux/io.h>
12 #include <linux/iopoll.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/of_platform.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/soc/mediatek/mtk_sip_svc.h>
19 #include <soc/mediatek/smi.h>
20 #include <dt-bindings/memory/mt2701-larb-port.h>
21 #include <dt-bindings/memory/mtk-memory-port.h>
22
23 /* SMI COMMON */
24 #define SMI_L1LEN 0x100
25
26 #define SMI_L1_ARB 0x200
27 #define SMI_BUS_SEL 0x220
28 #define SMI_BUS_LARB_SHIFT(larbid) ((larbid) << 1)
29 /* All are MMU0 defaultly. Only specialize mmu1 here. */
30 #define F_MMU1_LARB(larbid) (0x1 << SMI_BUS_LARB_SHIFT(larbid))
31
32 #define SMI_READ_FIFO_TH 0x230
33 #define SMI_M4U_TH 0x234
34 #define SMI_FIFO_TH1 0x238
35 #define SMI_FIFO_TH2 0x23c
36 #define SMI_DCM 0x300
37 #define SMI_DUMMY 0x444
38
39 /* SMI LARB */
40 #define SMI_LARB_SLP_CON 0xc
41 #define SLP_PROT_EN BIT(0)
42 #define SLP_PROT_RDY BIT(16)
43
44 #define SMI_LARB_CMD_THRT_CON 0x24
45 #define SMI_LARB_THRT_RD_NU_LMT_MSK GENMASK(7, 4)
46 #define SMI_LARB_THRT_RD_NU_LMT (5 << 4)
47
48 #define SMI_LARB_SW_FLAG 0x40
49 #define SMI_LARB_SW_FLAG_1 0x1
50
51 #define SMI_LARB_OSTDL_PORT 0x200
52 #define SMI_LARB_OSTDL_PORTx(id) (SMI_LARB_OSTDL_PORT + (((id) & 0x1f) << 2))
53
54 /* Below are about mmu enable registers, they are different in SoCs */
55 /* gen1: mt2701 */
56 #define REG_SMI_SECUR_CON_BASE 0x5c0
57
58 /* every register control 8 port, register offset 0x4 */
59 #define REG_SMI_SECUR_CON_OFFSET(id) (((id) >> 3) << 2)
60 #define REG_SMI_SECUR_CON_ADDR(id) \
61 (REG_SMI_SECUR_CON_BASE + REG_SMI_SECUR_CON_OFFSET(id))
62
63 /*
64 * every port have 4 bit to control, bit[port + 3] control virtual or physical,
65 * bit[port + 2 : port + 1] control the domain, bit[port] control the security
66 * or non-security.
67 */
68 #define SMI_SECUR_CON_VAL_MSK(id) (~(0xf << (((id) & 0x7) << 2)))
69 #define SMI_SECUR_CON_VAL_VIRT(id) BIT((((id) & 0x7) << 2) + 3)
70 /* mt2701 domain should be set to 3 */
71 #define SMI_SECUR_CON_VAL_DOMAIN(id) (0x3 << ((((id) & 0x7) << 2) + 1))
72
73 /* gen2: */
74 /* mt8167 */
75 #define MT8167_SMI_LARB_MMU_EN 0xfc0
76
77 /* mt8173 */
78 #define MT8173_SMI_LARB_MMU_EN 0xf00
79
80 /* general */
81 #define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4))
82 #define F_MMU_EN BIT(0)
83 #define BANK_SEL(id) ({ \
84 u32 _id = (id) & 0x3; \
85 (_id << 8 | _id << 10 | _id << 12 | _id << 14); \
86 })
87
88 #define SMI_COMMON_INIT_REGS_NR 6
89 #define SMI_LARB_PORT_NR_MAX 32
90
91 #define MTK_SMI_FLAG_THRT_UPDATE BIT(0)
92 #define MTK_SMI_FLAG_SW_FLAG BIT(1)
93 #define MTK_SMI_FLAG_SLEEP_CTL BIT(2)
94 #define MTK_SMI_FLAG_CFG_PORT_SEC_CTL BIT(3)
95 #define MTK_SMI_CAPS(flags, _x) (!!((flags) & (_x)))
96
97 struct mtk_smi_reg_pair {
98 unsigned int offset;
99 u32 value;
100 };
101
102 enum mtk_smi_type {
103 MTK_SMI_GEN1,
104 MTK_SMI_GEN2, /* gen2 smi common */
105 MTK_SMI_GEN2_SUB_COMM, /* gen2 smi sub common */
106 };
107
108 /* larbs: Require apb/smi clocks while gals is optional. */
109 static const char * const mtk_smi_larb_clks[] = {"apb", "smi", "gals"};
110 #define MTK_SMI_LARB_REQ_CLK_NR 2
111 #define MTK_SMI_LARB_OPT_CLK_NR 1
112
113 /*
114 * common: Require these four clocks in has_gals case. Otherwise, only apb/smi are required.
115 * sub common: Require apb/smi/gals0 clocks in has_gals case. Otherwise, only apb/smi are required.
116 */
117 static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1"};
118 #define MTK_SMI_CLK_NR_MAX ARRAY_SIZE(mtk_smi_common_clks)
119 #define MTK_SMI_COM_REQ_CLK_NR 2
120 #define MTK_SMI_COM_GALS_REQ_CLK_NR MTK_SMI_CLK_NR_MAX
121 #define MTK_SMI_SUB_COM_GALS_REQ_CLK_NR 3
122
123 struct mtk_smi_common_plat {
124 enum mtk_smi_type type;
125 bool has_gals;
126 u32 bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
127
128 const struct mtk_smi_reg_pair *init;
129 };
130
131 struct mtk_smi_larb_gen {
132 int port_in_larb[MTK_LARB_NR_MAX + 1];
133 int (*config_port)(struct device *dev);
134 unsigned int larb_direct_to_common_mask;
135 unsigned int flags_general;
136 const u8 (*ostd)[SMI_LARB_PORT_NR_MAX];
137 };
138
139 struct mtk_smi {
140 struct device *dev;
141 unsigned int clk_num;
142 struct clk_bulk_data clks[MTK_SMI_CLK_NR_MAX];
143 struct clk *clk_async; /*only needed by mt2701*/
144 union {
145 void __iomem *smi_ao_base; /* only for gen1 */
146 void __iomem *base; /* only for gen2 */
147 };
148 struct device *smi_common_dev; /* for sub common */
149 const struct mtk_smi_common_plat *plat;
150 };
151
152 struct mtk_smi_larb { /* larb: local arbiter */
153 struct mtk_smi smi;
154 void __iomem *base;
155 struct device *smi_common_dev; /* common or sub-common dev */
156 const struct mtk_smi_larb_gen *larb_gen;
157 int larbid;
158 u32 *mmu;
159 unsigned char *bank;
160 };
161
162 static int
mtk_smi_larb_bind(struct device * dev,struct device * master,void * data)163 mtk_smi_larb_bind(struct device *dev, struct device *master, void *data)
164 {
165 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
166 struct mtk_smi_larb_iommu *larb_mmu = data;
167 unsigned int i;
168
169 for (i = 0; i < MTK_LARB_NR_MAX; i++) {
170 if (dev == larb_mmu[i].dev) {
171 larb->larbid = i;
172 larb->mmu = &larb_mmu[i].mmu;
173 larb->bank = larb_mmu[i].bank;
174 return 0;
175 }
176 }
177 return -ENODEV;
178 }
179
180 static void
mtk_smi_larb_unbind(struct device * dev,struct device * master,void * data)181 mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data)
182 {
183 /* Do nothing as the iommu is always enabled. */
184 }
185
186 static const struct component_ops mtk_smi_larb_component_ops = {
187 .bind = mtk_smi_larb_bind,
188 .unbind = mtk_smi_larb_unbind,
189 };
190
mtk_smi_larb_config_port_gen1(struct device * dev)191 static int mtk_smi_larb_config_port_gen1(struct device *dev)
192 {
193 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
194 const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
195 struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
196 int i, m4u_port_id, larb_port_num;
197 u32 sec_con_val, reg_val;
198
199 m4u_port_id = larb_gen->port_in_larb[larb->larbid];
200 larb_port_num = larb_gen->port_in_larb[larb->larbid + 1]
201 - larb_gen->port_in_larb[larb->larbid];
202
203 for (i = 0; i < larb_port_num; i++, m4u_port_id++) {
204 if (*larb->mmu & BIT(i)) {
205 /* bit[port + 3] controls the virtual or physical */
206 sec_con_val = SMI_SECUR_CON_VAL_VIRT(m4u_port_id);
207 } else {
208 /* do not need to enable m4u for this port */
209 continue;
210 }
211 reg_val = readl(common->smi_ao_base
212 + REG_SMI_SECUR_CON_ADDR(m4u_port_id));
213 reg_val &= SMI_SECUR_CON_VAL_MSK(m4u_port_id);
214 reg_val |= sec_con_val;
215 reg_val |= SMI_SECUR_CON_VAL_DOMAIN(m4u_port_id);
216 writel(reg_val,
217 common->smi_ao_base
218 + REG_SMI_SECUR_CON_ADDR(m4u_port_id));
219 }
220 return 0;
221 }
222
mtk_smi_larb_config_port_mt8167(struct device * dev)223 static int mtk_smi_larb_config_port_mt8167(struct device *dev)
224 {
225 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
226
227 writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
228 return 0;
229 }
230
mtk_smi_larb_config_port_mt8173(struct device * dev)231 static int mtk_smi_larb_config_port_mt8173(struct device *dev)
232 {
233 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
234
235 writel(*larb->mmu, larb->base + MT8173_SMI_LARB_MMU_EN);
236 return 0;
237 }
238
mtk_smi_larb_config_port_gen2_general(struct device * dev)239 static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
240 {
241 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
242 u32 reg, flags_general = larb->larb_gen->flags_general;
243 const u8 *larbostd = larb->larb_gen->ostd ? larb->larb_gen->ostd[larb->larbid] : NULL;
244 struct arm_smccc_res res;
245 int i;
246
247 if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
248 return 0;
249
250 if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_THRT_UPDATE)) {
251 reg = readl_relaxed(larb->base + SMI_LARB_CMD_THRT_CON);
252 reg &= ~SMI_LARB_THRT_RD_NU_LMT_MSK;
253 reg |= SMI_LARB_THRT_RD_NU_LMT;
254 writel_relaxed(reg, larb->base + SMI_LARB_CMD_THRT_CON);
255 }
256
257 if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_SW_FLAG))
258 writel_relaxed(SMI_LARB_SW_FLAG_1, larb->base + SMI_LARB_SW_FLAG);
259
260 for (i = 0; i < SMI_LARB_PORT_NR_MAX && larbostd && !!larbostd[i]; i++)
261 writel_relaxed(larbostd[i], larb->base + SMI_LARB_OSTDL_PORTx(i));
262
263 /*
264 * When mmu_en bits are in security world, the bank_sel still is in the
265 * LARB_NONSEC_CON below. And the mmu_en bits of LARB_NONSEC_CON have no
266 * effect in this case.
267 */
268 if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_CFG_PORT_SEC_CTL)) {
269 arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL, IOMMU_ATF_CMD_CONFIG_SMI_LARB,
270 larb->larbid, *larb->mmu, 0, 0, 0, 0, &res);
271 if (res.a0 != 0) {
272 dev_err(dev, "Enable iommu fail, ret %ld\n", res.a0);
273 return -EINVAL;
274 }
275 }
276
277 for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
278 reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
279 reg |= F_MMU_EN;
280 reg |= BANK_SEL(larb->bank[i]);
281 writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
282 }
283 return 0;
284 }
285
286 static const u8 mtk_smi_larb_mt8188_ostd[][SMI_LARB_PORT_NR_MAX] = {
287 [0] = {0x02, 0x18, 0x22, 0x22, 0x01, 0x02, 0x0a,},
288 [1] = {0x12, 0x02, 0x14, 0x14, 0x01, 0x18, 0x0a,},
289 [2] = {0x12, 0x12, 0x12, 0x12, 0x0a,},
290 [3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
291 [4] = {0x06, 0x01, 0x17, 0x06, 0x0a, 0x07, 0x07,},
292 [5] = {0x02, 0x01, 0x04, 0x02, 0x06, 0x01, 0x06, 0x0a,},
293 [6] = {0x06, 0x01, 0x06, 0x0a,},
294 [7] = {0x0c, 0x0c, 0x12,},
295 [8] = {0x0c, 0x01, 0x0a, 0x05, 0x02, 0x03, 0x01, 0x01, 0x14, 0x14,
296 0x0a, 0x14, 0x1e, 0x01, 0x0c, 0x0a, 0x05, 0x02, 0x02, 0x05,
297 0x03, 0x01, 0x1e, 0x01, 0x05,},
298 [9] = {0x1e, 0x01, 0x0a, 0x0a, 0x01, 0x01, 0x03, 0x1e, 0x1e, 0x10,
299 0x07, 0x01, 0x0a, 0x06, 0x03, 0x03, 0x0e, 0x01, 0x04, 0x28,},
300 [10] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
301 0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
302 0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
303 [11] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
304 0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
305 0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
306 [12] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
307 0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
308 0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
309 [13] = {0x07, 0x02, 0x04, 0x02, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
310 0x07, 0x02, 0x04, 0x02, 0x05, 0x05,},
311 [14] = {0x02, 0x02, 0x0c, 0x0c, 0x0c, 0x0c, 0x01, 0x01, 0x02, 0x02,
312 0x02, 0x02, 0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
313 0x02, 0x02, 0x01, 0x01,},
314 [15] = {0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x0c, 0x0c,
315 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x02,
316 0x0c, 0x01, 0x01,},
317 [16] = {0x28, 0x28, 0x03, 0x01, 0x01, 0x03, 0x14, 0x14, 0x0a, 0x0d,
318 0x03, 0x05, 0x0e, 0x01, 0x01, 0x05, 0x06, 0x0d, 0x01,},
319 [17] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
320 0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
321 [18] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
322 0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
323 [19] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
324 [20] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
325 [21] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
326 0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
327 0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
328 [22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,
329 0x01,},
330 [23] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x18, 0x01, 0x01,},
331 [24] = {0x12, 0x06, 0x12, 0x06,},
332 [25] = {0x01},
333 };
334
335 static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
336 [0] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb0 */
337 [1] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb1 */
338 [2] = {0x12, 0x12, 0x12, 0x12, 0x0a,}, /* ... */
339 [3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
340 [4] = {0x06, 0x01, 0x17, 0x06, 0x0a,},
341 [5] = {0x06, 0x01, 0x17, 0x06, 0x06, 0x01, 0x06, 0x0a,},
342 [6] = {0x06, 0x01, 0x06, 0x0a,},
343 [7] = {0x0c, 0x0c, 0x12,},
344 [8] = {0x0c, 0x0c, 0x12,},
345 [9] = {0x0a, 0x08, 0x04, 0x06, 0x01, 0x01, 0x10, 0x18, 0x11, 0x0a,
346 0x08, 0x04, 0x11, 0x06, 0x02, 0x06, 0x01, 0x11, 0x11, 0x06,},
347 [10] = {0x18, 0x08, 0x01, 0x01, 0x20, 0x12, 0x18, 0x06, 0x05, 0x10,
348 0x08, 0x08, 0x10, 0x08, 0x08, 0x18, 0x0c, 0x09, 0x0b, 0x0d,
349 0x0d, 0x06, 0x10, 0x10,},
350 [11] = {0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x01, 0x01, 0x01, 0x01,},
351 [12] = {0x09, 0x09, 0x05, 0x05, 0x0c, 0x18, 0x02, 0x02, 0x04, 0x02,},
352 [13] = {0x02, 0x02, 0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x08, 0x01,},
353 [14] = {0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x16, 0x01, 0x16, 0x01,
354 0x01, 0x02, 0x02, 0x08, 0x02,},
355 [15] = {},
356 [16] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
357 0x12, 0x02, 0x0a, 0x16, 0x02, 0x04,},
358 [17] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
359 [18] = {0x12, 0x06, 0x12, 0x06,},
360 [19] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
361 0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
362 0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
363 [20] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
364 0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
365 0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
366 [21] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
367 [22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
368 [23] = {0x18, 0x01,},
369 [24] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x01,
370 0x01, 0x01,},
371 [25] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
372 0x02, 0x01,},
373 [26] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
374 0x02, 0x01,},
375 [27] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
376 0x02, 0x01,},
377 [28] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
378 };
379
380 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
381 .port_in_larb = {
382 LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
383 LARB2_PORT_OFFSET, LARB3_PORT_OFFSET
384 },
385 .config_port = mtk_smi_larb_config_port_gen1,
386 };
387
388 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2712 = {
389 .config_port = mtk_smi_larb_config_port_gen2_general,
390 .larb_direct_to_common_mask = BIT(8) | BIT(9), /* bdpsys */
391 };
392
393 static const struct mtk_smi_larb_gen mtk_smi_larb_mt6779 = {
394 .config_port = mtk_smi_larb_config_port_gen2_general,
395 .larb_direct_to_common_mask =
396 BIT(4) | BIT(6) | BIT(11) | BIT(12) | BIT(13),
397 /* DUMMY | IPU0 | IPU1 | CCU | MDLA */
398 };
399
400 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8167 = {
401 /* mt8167 do not need the port in larb */
402 .config_port = mtk_smi_larb_config_port_mt8167,
403 };
404
405 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
406 /* mt8173 do not need the port in larb */
407 .config_port = mtk_smi_larb_config_port_mt8173,
408 };
409
410 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8183 = {
411 .config_port = mtk_smi_larb_config_port_gen2_general,
412 .larb_direct_to_common_mask = BIT(2) | BIT(3) | BIT(7),
413 /* IPU0 | IPU1 | CCU */
414 };
415
416 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8186 = {
417 .config_port = mtk_smi_larb_config_port_gen2_general,
418 .flags_general = MTK_SMI_FLAG_SLEEP_CTL,
419 };
420
421 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8188 = {
422 .config_port = mtk_smi_larb_config_port_gen2_general,
423 .flags_general = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
424 MTK_SMI_FLAG_SLEEP_CTL | MTK_SMI_FLAG_CFG_PORT_SEC_CTL,
425 .ostd = mtk_smi_larb_mt8188_ostd,
426 };
427
428 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
429 .config_port = mtk_smi_larb_config_port_gen2_general,
430 };
431
432 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8195 = {
433 .config_port = mtk_smi_larb_config_port_gen2_general,
434 .flags_general = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
435 MTK_SMI_FLAG_SLEEP_CTL,
436 .ostd = mtk_smi_larb_mt8195_ostd,
437 };
438
439 static const struct of_device_id mtk_smi_larb_of_ids[] = {
440 {.compatible = "mediatek,mt2701-smi-larb", .data = &mtk_smi_larb_mt2701},
441 {.compatible = "mediatek,mt2712-smi-larb", .data = &mtk_smi_larb_mt2712},
442 {.compatible = "mediatek,mt6779-smi-larb", .data = &mtk_smi_larb_mt6779},
443 {.compatible = "mediatek,mt6795-smi-larb", .data = &mtk_smi_larb_mt8173},
444 {.compatible = "mediatek,mt8167-smi-larb", .data = &mtk_smi_larb_mt8167},
445 {.compatible = "mediatek,mt8173-smi-larb", .data = &mtk_smi_larb_mt8173},
446 {.compatible = "mediatek,mt8183-smi-larb", .data = &mtk_smi_larb_mt8183},
447 {.compatible = "mediatek,mt8186-smi-larb", .data = &mtk_smi_larb_mt8186},
448 {.compatible = "mediatek,mt8188-smi-larb", .data = &mtk_smi_larb_mt8188},
449 {.compatible = "mediatek,mt8192-smi-larb", .data = &mtk_smi_larb_mt8192},
450 {.compatible = "mediatek,mt8195-smi-larb", .data = &mtk_smi_larb_mt8195},
451 {}
452 };
453 MODULE_DEVICE_TABLE(of, mtk_smi_larb_of_ids);
454
mtk_smi_larb_sleep_ctrl_enable(struct mtk_smi_larb * larb)455 static int mtk_smi_larb_sleep_ctrl_enable(struct mtk_smi_larb *larb)
456 {
457 int ret;
458 u32 tmp;
459
460 writel_relaxed(SLP_PROT_EN, larb->base + SMI_LARB_SLP_CON);
461 ret = readl_poll_timeout_atomic(larb->base + SMI_LARB_SLP_CON,
462 tmp, !!(tmp & SLP_PROT_RDY), 10, 1000);
463 if (ret) {
464 /* TODO: Reset this larb if it fails here. */
465 dev_err(larb->smi.dev, "sleep ctrl is not ready(0x%x).\n", tmp);
466 }
467 return ret;
468 }
469
mtk_smi_larb_sleep_ctrl_disable(struct mtk_smi_larb * larb)470 static void mtk_smi_larb_sleep_ctrl_disable(struct mtk_smi_larb *larb)
471 {
472 writel_relaxed(0, larb->base + SMI_LARB_SLP_CON);
473 }
474
mtk_smi_device_link_common(struct device * dev,struct device ** com_dev)475 static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev)
476 {
477 struct platform_device *smi_com_pdev;
478 struct device_node *smi_com_node;
479 struct device *smi_com_dev;
480 struct device_link *link;
481
482 smi_com_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
483 if (!smi_com_node)
484 return -EINVAL;
485
486 smi_com_pdev = of_find_device_by_node(smi_com_node);
487 of_node_put(smi_com_node);
488 if (smi_com_pdev) {
489 /* smi common is the supplier, Make sure it is ready before */
490 if (!platform_get_drvdata(smi_com_pdev)) {
491 put_device(&smi_com_pdev->dev);
492 return -EPROBE_DEFER;
493 }
494 smi_com_dev = &smi_com_pdev->dev;
495 link = device_link_add(dev, smi_com_dev,
496 DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
497 if (!link) {
498 dev_err(dev, "Unable to link smi-common dev\n");
499 put_device(&smi_com_pdev->dev);
500 return -ENODEV;
501 }
502 *com_dev = smi_com_dev;
503 } else {
504 dev_err(dev, "Failed to get the smi_common device\n");
505 return -EINVAL;
506 }
507 return 0;
508 }
509
mtk_smi_dts_clk_init(struct device * dev,struct mtk_smi * smi,const char * const clks[],unsigned int clk_nr_required,unsigned int clk_nr_optional)510 static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi,
511 const char * const clks[],
512 unsigned int clk_nr_required,
513 unsigned int clk_nr_optional)
514 {
515 int i, ret;
516
517 for (i = 0; i < clk_nr_required; i++)
518 smi->clks[i].id = clks[i];
519 ret = devm_clk_bulk_get(dev, clk_nr_required, smi->clks);
520 if (ret)
521 return ret;
522
523 for (i = clk_nr_required; i < clk_nr_required + clk_nr_optional; i++)
524 smi->clks[i].id = clks[i];
525 ret = devm_clk_bulk_get_optional(dev, clk_nr_optional,
526 smi->clks + clk_nr_required);
527 smi->clk_num = clk_nr_required + clk_nr_optional;
528 return ret;
529 }
530
mtk_smi_larb_probe(struct platform_device * pdev)531 static int mtk_smi_larb_probe(struct platform_device *pdev)
532 {
533 struct mtk_smi_larb *larb;
534 struct device *dev = &pdev->dev;
535 int ret;
536
537 larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
538 if (!larb)
539 return -ENOMEM;
540
541 larb->larb_gen = of_device_get_match_data(dev);
542 larb->base = devm_platform_ioremap_resource(pdev, 0);
543 if (IS_ERR(larb->base))
544 return PTR_ERR(larb->base);
545
546 ret = mtk_smi_dts_clk_init(dev, &larb->smi, mtk_smi_larb_clks,
547 MTK_SMI_LARB_REQ_CLK_NR, MTK_SMI_LARB_OPT_CLK_NR);
548 if (ret)
549 return ret;
550
551 larb->smi.dev = dev;
552
553 ret = mtk_smi_device_link_common(dev, &larb->smi_common_dev);
554 if (ret < 0)
555 return ret;
556
557 pm_runtime_enable(dev);
558 platform_set_drvdata(pdev, larb);
559 ret = component_add(dev, &mtk_smi_larb_component_ops);
560 if (ret)
561 goto err_pm_disable;
562 return 0;
563
564 err_pm_disable:
565 pm_runtime_disable(dev);
566 device_link_remove(dev, larb->smi_common_dev);
567 return ret;
568 }
569
mtk_smi_larb_remove(struct platform_device * pdev)570 static void mtk_smi_larb_remove(struct platform_device *pdev)
571 {
572 struct mtk_smi_larb *larb = platform_get_drvdata(pdev);
573
574 device_link_remove(&pdev->dev, larb->smi_common_dev);
575 pm_runtime_disable(&pdev->dev);
576 component_del(&pdev->dev, &mtk_smi_larb_component_ops);
577 }
578
mtk_smi_larb_resume(struct device * dev)579 static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
580 {
581 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
582 const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
583 int ret;
584
585 ret = clk_bulk_prepare_enable(larb->smi.clk_num, larb->smi.clks);
586 if (ret)
587 return ret;
588
589 if (MTK_SMI_CAPS(larb->larb_gen->flags_general, MTK_SMI_FLAG_SLEEP_CTL))
590 mtk_smi_larb_sleep_ctrl_disable(larb);
591
592 /* Configure the basic setting for this larb */
593 return larb_gen->config_port(dev);
594 }
595
mtk_smi_larb_suspend(struct device * dev)596 static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
597 {
598 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
599 int ret;
600
601 if (MTK_SMI_CAPS(larb->larb_gen->flags_general, MTK_SMI_FLAG_SLEEP_CTL)) {
602 ret = mtk_smi_larb_sleep_ctrl_enable(larb);
603 if (ret)
604 return ret;
605 }
606
607 clk_bulk_disable_unprepare(larb->smi.clk_num, larb->smi.clks);
608 return 0;
609 }
610
611 static const struct dev_pm_ops smi_larb_pm_ops = {
612 SET_RUNTIME_PM_OPS(mtk_smi_larb_suspend, mtk_smi_larb_resume, NULL)
613 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
614 pm_runtime_force_resume)
615 };
616
617 static struct platform_driver mtk_smi_larb_driver = {
618 .probe = mtk_smi_larb_probe,
619 .remove_new = mtk_smi_larb_remove,
620 .driver = {
621 .name = "mtk-smi-larb",
622 .of_match_table = mtk_smi_larb_of_ids,
623 .pm = &smi_larb_pm_ops,
624 }
625 };
626
627 static const struct mtk_smi_reg_pair mtk_smi_common_mt6795_init[SMI_COMMON_INIT_REGS_NR] = {
628 {SMI_L1_ARB, 0x1b},
629 {SMI_M4U_TH, 0xce810c85},
630 {SMI_FIFO_TH1, 0x43214c8},
631 {SMI_READ_FIFO_TH, 0x191f},
632 };
633
634 static const struct mtk_smi_reg_pair mtk_smi_common_mt8195_init[SMI_COMMON_INIT_REGS_NR] = {
635 {SMI_L1LEN, 0xb},
636 {SMI_M4U_TH, 0xe100e10},
637 {SMI_FIFO_TH1, 0x506090a},
638 {SMI_FIFO_TH2, 0x506090a},
639 {SMI_DCM, 0x4f1},
640 {SMI_DUMMY, 0x1},
641 };
642
643 static const struct mtk_smi_common_plat mtk_smi_common_gen1 = {
644 .type = MTK_SMI_GEN1,
645 };
646
647 static const struct mtk_smi_common_plat mtk_smi_common_gen2 = {
648 .type = MTK_SMI_GEN2,
649 };
650
651 static const struct mtk_smi_common_plat mtk_smi_common_mt6779 = {
652 .type = MTK_SMI_GEN2,
653 .has_gals = true,
654 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(4) |
655 F_MMU1_LARB(5) | F_MMU1_LARB(6) | F_MMU1_LARB(7),
656 };
657
658 static const struct mtk_smi_common_plat mtk_smi_common_mt6795 = {
659 .type = MTK_SMI_GEN2,
660 .bus_sel = F_MMU1_LARB(0),
661 .init = mtk_smi_common_mt6795_init,
662 };
663
664 static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
665 .type = MTK_SMI_GEN2,
666 .has_gals = true,
667 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
668 F_MMU1_LARB(7),
669 };
670
671 static const struct mtk_smi_common_plat mtk_smi_common_mt8186 = {
672 .type = MTK_SMI_GEN2,
673 .has_gals = true,
674 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(4) | F_MMU1_LARB(7),
675 };
676
677 static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vdo = {
678 .type = MTK_SMI_GEN2,
679 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(5) | F_MMU1_LARB(7),
680 .init = mtk_smi_common_mt8195_init,
681 };
682
683 static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vpp = {
684 .type = MTK_SMI_GEN2,
685 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
686 .init = mtk_smi_common_mt8195_init,
687 };
688
689 static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
690 .type = MTK_SMI_GEN2,
691 .has_gals = true,
692 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
693 F_MMU1_LARB(6),
694 };
695
696 static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vdo = {
697 .type = MTK_SMI_GEN2,
698 .has_gals = true,
699 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(3) | F_MMU1_LARB(5) |
700 F_MMU1_LARB(7),
701 .init = mtk_smi_common_mt8195_init,
702 };
703
704 static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vpp = {
705 .type = MTK_SMI_GEN2,
706 .has_gals = true,
707 .bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
708 .init = mtk_smi_common_mt8195_init,
709 };
710
711 static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8195 = {
712 .type = MTK_SMI_GEN2_SUB_COMM,
713 .has_gals = true,
714 };
715
716 static const struct mtk_smi_common_plat mtk_smi_common_mt8365 = {
717 .type = MTK_SMI_GEN2,
718 .bus_sel = F_MMU1_LARB(2) | F_MMU1_LARB(4),
719 };
720
721 static const struct of_device_id mtk_smi_common_of_ids[] = {
722 {.compatible = "mediatek,mt2701-smi-common", .data = &mtk_smi_common_gen1},
723 {.compatible = "mediatek,mt2712-smi-common", .data = &mtk_smi_common_gen2},
724 {.compatible = "mediatek,mt6779-smi-common", .data = &mtk_smi_common_mt6779},
725 {.compatible = "mediatek,mt6795-smi-common", .data = &mtk_smi_common_mt6795},
726 {.compatible = "mediatek,mt8167-smi-common", .data = &mtk_smi_common_gen2},
727 {.compatible = "mediatek,mt8173-smi-common", .data = &mtk_smi_common_gen2},
728 {.compatible = "mediatek,mt8183-smi-common", .data = &mtk_smi_common_mt8183},
729 {.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186},
730 {.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo},
731 {.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp},
732 {.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
733 {.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo},
734 {.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},
735 {.compatible = "mediatek,mt8195-smi-sub-common", .data = &mtk_smi_sub_common_mt8195},
736 {.compatible = "mediatek,mt8365-smi-common", .data = &mtk_smi_common_mt8365},
737 {}
738 };
739 MODULE_DEVICE_TABLE(of, mtk_smi_common_of_ids);
740
mtk_smi_common_probe(struct platform_device * pdev)741 static int mtk_smi_common_probe(struct platform_device *pdev)
742 {
743 struct device *dev = &pdev->dev;
744 struct mtk_smi *common;
745 int ret, clk_required = MTK_SMI_COM_REQ_CLK_NR;
746
747 common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
748 if (!common)
749 return -ENOMEM;
750 common->dev = dev;
751 common->plat = of_device_get_match_data(dev);
752
753 if (common->plat->has_gals) {
754 if (common->plat->type == MTK_SMI_GEN2)
755 clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
756 else if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
757 clk_required = MTK_SMI_SUB_COM_GALS_REQ_CLK_NR;
758 }
759 ret = mtk_smi_dts_clk_init(dev, common, mtk_smi_common_clks, clk_required, 0);
760 if (ret)
761 return ret;
762
763 /*
764 * for mtk smi gen 1, we need to get the ao(always on) base to config
765 * m4u port, and we need to enable the aync clock for transform the smi
766 * clock into emi clock domain, but for mtk smi gen2, there's no smi ao
767 * base.
768 */
769 if (common->plat->type == MTK_SMI_GEN1) {
770 common->smi_ao_base = devm_platform_ioremap_resource(pdev, 0);
771 if (IS_ERR(common->smi_ao_base))
772 return PTR_ERR(common->smi_ao_base);
773
774 common->clk_async = devm_clk_get(dev, "async");
775 if (IS_ERR(common->clk_async))
776 return PTR_ERR(common->clk_async);
777
778 ret = clk_prepare_enable(common->clk_async);
779 if (ret)
780 return ret;
781 } else {
782 common->base = devm_platform_ioremap_resource(pdev, 0);
783 if (IS_ERR(common->base))
784 return PTR_ERR(common->base);
785 }
786
787 /* link its smi-common if this is smi-sub-common */
788 if (common->plat->type == MTK_SMI_GEN2_SUB_COMM) {
789 ret = mtk_smi_device_link_common(dev, &common->smi_common_dev);
790 if (ret < 0)
791 return ret;
792 }
793
794 pm_runtime_enable(dev);
795 platform_set_drvdata(pdev, common);
796 return 0;
797 }
798
mtk_smi_common_remove(struct platform_device * pdev)799 static void mtk_smi_common_remove(struct platform_device *pdev)
800 {
801 struct mtk_smi *common = dev_get_drvdata(&pdev->dev);
802
803 if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
804 device_link_remove(&pdev->dev, common->smi_common_dev);
805 pm_runtime_disable(&pdev->dev);
806 }
807
mtk_smi_common_resume(struct device * dev)808 static int __maybe_unused mtk_smi_common_resume(struct device *dev)
809 {
810 struct mtk_smi *common = dev_get_drvdata(dev);
811 const struct mtk_smi_reg_pair *init = common->plat->init;
812 u32 bus_sel = common->plat->bus_sel; /* default is 0 */
813 int ret, i;
814
815 ret = clk_bulk_prepare_enable(common->clk_num, common->clks);
816 if (ret)
817 return ret;
818
819 if (common->plat->type != MTK_SMI_GEN2)
820 return 0;
821
822 for (i = 0; i < SMI_COMMON_INIT_REGS_NR && init && init[i].offset; i++)
823 writel_relaxed(init[i].value, common->base + init[i].offset);
824
825 writel(bus_sel, common->base + SMI_BUS_SEL);
826 return 0;
827 }
828
mtk_smi_common_suspend(struct device * dev)829 static int __maybe_unused mtk_smi_common_suspend(struct device *dev)
830 {
831 struct mtk_smi *common = dev_get_drvdata(dev);
832
833 clk_bulk_disable_unprepare(common->clk_num, common->clks);
834 return 0;
835 }
836
837 static const struct dev_pm_ops smi_common_pm_ops = {
838 SET_RUNTIME_PM_OPS(mtk_smi_common_suspend, mtk_smi_common_resume, NULL)
839 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
840 pm_runtime_force_resume)
841 };
842
843 static struct platform_driver mtk_smi_common_driver = {
844 .probe = mtk_smi_common_probe,
845 .remove_new = mtk_smi_common_remove,
846 .driver = {
847 .name = "mtk-smi-common",
848 .of_match_table = mtk_smi_common_of_ids,
849 .pm = &smi_common_pm_ops,
850 }
851 };
852
853 static struct platform_driver * const smidrivers[] = {
854 &mtk_smi_common_driver,
855 &mtk_smi_larb_driver,
856 };
857
mtk_smi_init(void)858 static int __init mtk_smi_init(void)
859 {
860 return platform_register_drivers(smidrivers, ARRAY_SIZE(smidrivers));
861 }
862 module_init(mtk_smi_init);
863
mtk_smi_exit(void)864 static void __exit mtk_smi_exit(void)
865 {
866 platform_unregister_drivers(smidrivers, ARRAY_SIZE(smidrivers));
867 }
868 module_exit(mtk_smi_exit);
869
870 MODULE_DESCRIPTION("MediaTek SMI driver");
871 MODULE_LICENSE("GPL v2");
872