1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2015-2016 MediaTek Inc.
4 * Author: Yong Wu <yong.wu@mediatek.com>
7 #include <linux/component.h>
8 #include <linux/device.h>
11 #include <linux/module.h>
13 #include <linux/of_platform.h>
14 #include <linux/platform_device.h>
15 #include <linux/pm_runtime.h>
16 #include <soc/mediatek/smi.h>
17 #include <dt-bindings/memory/mt2701-larb-port.h>
20 #define SMI_LARB_MMU_EN 0xf00
23 #define REG_SMI_SECUR_CON_BASE 0x5c0
25 /* every register control 8 port, register offset 0x4 */
26 #define REG_SMI_SECUR_CON_OFFSET(id) (((id) >> 3) << 2)
27 #define REG_SMI_SECUR_CON_ADDR(id) \
28 (REG_SMI_SECUR_CON_BASE + REG_SMI_SECUR_CON_OFFSET(id))
31 * every port have 4 bit to control, bit[port + 3] control virtual or physical,
32 * bit[port + 2 : port + 1] control the domain, bit[port] control the security
35 #define SMI_SECUR_CON_VAL_MSK(id) (~(0xf << (((id) & 0x7) << 2)))
36 #define SMI_SECUR_CON_VAL_VIRT(id) BIT((((id) & 0x7) << 2) + 3)
37 /* mt2701 domain should be set to 3 */
38 #define SMI_SECUR_CON_VAL_DOMAIN(id) (0x3 << ((((id) & 0x7) << 2) + 1))
41 #define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4))
42 #define F_MMU_EN BIT(0)
44 struct mtk_smi_larb_gen {
46 int port_in_larb[MTK_LARB_NR_MAX + 1];
47 void (*config_port)(struct device *);
52 struct clk *clk_apb, *clk_smi;
53 struct clk *clk_async; /*only needed by mt2701*/
54 void __iomem *smi_ao_base;
57 struct mtk_smi_larb { /* larb: local arbiter */
60 struct device *smi_common_dev;
61 const struct mtk_smi_larb_gen *larb_gen;
71 static int mtk_smi_enable(const struct mtk_smi *smi)
75 ret = pm_runtime_get_sync(smi->dev);
79 ret = clk_prepare_enable(smi->clk_apb);
83 ret = clk_prepare_enable(smi->clk_smi);
90 clk_disable_unprepare(smi->clk_apb);
92 pm_runtime_put_sync(smi->dev);
96 static void mtk_smi_disable(const struct mtk_smi *smi)
98 clk_disable_unprepare(smi->clk_smi);
99 clk_disable_unprepare(smi->clk_apb);
100 pm_runtime_put_sync(smi->dev);
103 int mtk_smi_larb_get(struct device *larbdev)
105 struct mtk_smi_larb *larb = dev_get_drvdata(larbdev);
106 const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
107 struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
110 /* Enable the smi-common's power and clocks */
111 ret = mtk_smi_enable(common);
115 /* Enable the larb's power and clocks */
116 ret = mtk_smi_enable(&larb->smi);
118 mtk_smi_disable(common);
122 /* Configure the iommu info for this larb */
123 larb_gen->config_port(larbdev);
127 EXPORT_SYMBOL_GPL(mtk_smi_larb_get);
129 void mtk_smi_larb_put(struct device *larbdev)
131 struct mtk_smi_larb *larb = dev_get_drvdata(larbdev);
132 struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
135 * Don't de-configure the iommu info for this larb since there may be
136 * several modules in this larb.
137 * The iommu info will be reset after power off.
140 mtk_smi_disable(&larb->smi);
141 mtk_smi_disable(common);
143 EXPORT_SYMBOL_GPL(mtk_smi_larb_put);
146 mtk_smi_larb_bind(struct device *dev, struct device *master, void *data)
148 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
149 struct mtk_smi_iommu *smi_iommu = data;
152 if (larb->larb_gen->need_larbid) {
153 larb->mmu = &smi_iommu->larb_imu[larb->larbid].mmu;
158 * If there is no larbid property, Loop to find the corresponding
161 for (i = 0; i < smi_iommu->larb_nr; i++) {
162 if (dev == smi_iommu->larb_imu[i].dev) {
163 /* The 'mmu' may be updated in iommu-attach/detach. */
164 larb->mmu = &smi_iommu->larb_imu[i].mmu;
171 static void mtk_smi_larb_config_port_mt2712(struct device *dev)
173 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
178 * larb 8/9 is the bdpsys larb, the iommu_en is enabled defaultly.
179 * Don't need to set it again.
181 if (larb->larbid == 8 || larb->larbid == 9)
184 for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
185 reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
187 writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
191 static void mtk_smi_larb_config_port_mt8173(struct device *dev)
193 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
195 writel(*larb->mmu, larb->base + SMI_LARB_MMU_EN);
198 static void mtk_smi_larb_config_port_gen1(struct device *dev)
200 struct mtk_smi_larb *larb = dev_get_drvdata(dev);
201 const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
202 struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev);
203 int i, m4u_port_id, larb_port_num;
204 u32 sec_con_val, reg_val;
206 m4u_port_id = larb_gen->port_in_larb[larb->larbid];
207 larb_port_num = larb_gen->port_in_larb[larb->larbid + 1]
208 - larb_gen->port_in_larb[larb->larbid];
210 for (i = 0; i < larb_port_num; i++, m4u_port_id++) {
211 if (*larb->mmu & BIT(i)) {
212 /* bit[port + 3] controls the virtual or physical */
213 sec_con_val = SMI_SECUR_CON_VAL_VIRT(m4u_port_id);
215 /* do not need to enable m4u for this port */
218 reg_val = readl(common->smi_ao_base
219 + REG_SMI_SECUR_CON_ADDR(m4u_port_id));
220 reg_val &= SMI_SECUR_CON_VAL_MSK(m4u_port_id);
221 reg_val |= sec_con_val;
222 reg_val |= SMI_SECUR_CON_VAL_DOMAIN(m4u_port_id);
225 + REG_SMI_SECUR_CON_ADDR(m4u_port_id));
230 mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data)
232 /* Do nothing as the iommu is always enabled. */
235 static const struct component_ops mtk_smi_larb_component_ops = {
236 .bind = mtk_smi_larb_bind,
237 .unbind = mtk_smi_larb_unbind,
240 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
241 /* mt8173 do not need the port in larb */
242 .config_port = mtk_smi_larb_config_port_mt8173,
245 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
248 LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
249 LARB2_PORT_OFFSET, LARB3_PORT_OFFSET
251 .config_port = mtk_smi_larb_config_port_gen1,
254 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2712 = {
256 .config_port = mtk_smi_larb_config_port_mt2712,
259 static const struct of_device_id mtk_smi_larb_of_ids[] = {
261 .compatible = "mediatek,mt8173-smi-larb",
262 .data = &mtk_smi_larb_mt8173
265 .compatible = "mediatek,mt2701-smi-larb",
266 .data = &mtk_smi_larb_mt2701
269 .compatible = "mediatek,mt2712-smi-larb",
270 .data = &mtk_smi_larb_mt2712
275 static int mtk_smi_larb_probe(struct platform_device *pdev)
277 struct mtk_smi_larb *larb;
278 struct resource *res;
279 struct device *dev = &pdev->dev;
280 struct device_node *smi_node;
281 struct platform_device *smi_pdev;
284 larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
288 larb->larb_gen = of_device_get_match_data(dev);
289 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
290 larb->base = devm_ioremap_resource(dev, res);
291 if (IS_ERR(larb->base))
292 return PTR_ERR(larb->base);
294 larb->smi.clk_apb = devm_clk_get(dev, "apb");
295 if (IS_ERR(larb->smi.clk_apb))
296 return PTR_ERR(larb->smi.clk_apb);
298 larb->smi.clk_smi = devm_clk_get(dev, "smi");
299 if (IS_ERR(larb->smi.clk_smi))
300 return PTR_ERR(larb->smi.clk_smi);
303 if (larb->larb_gen->need_larbid) {
304 err = of_property_read_u32(dev->of_node, "mediatek,larb-id",
307 dev_err(dev, "missing larbid property\n");
312 smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
316 smi_pdev = of_find_device_by_node(smi_node);
317 of_node_put(smi_node);
319 if (!platform_get_drvdata(smi_pdev))
320 return -EPROBE_DEFER;
321 larb->smi_common_dev = &smi_pdev->dev;
323 dev_err(dev, "Failed to get the smi_common device\n");
327 pm_runtime_enable(dev);
328 platform_set_drvdata(pdev, larb);
329 return component_add(dev, &mtk_smi_larb_component_ops);
332 static int mtk_smi_larb_remove(struct platform_device *pdev)
334 pm_runtime_disable(&pdev->dev);
335 component_del(&pdev->dev, &mtk_smi_larb_component_ops);
339 static struct platform_driver mtk_smi_larb_driver = {
340 .probe = mtk_smi_larb_probe,
341 .remove = mtk_smi_larb_remove,
343 .name = "mtk-smi-larb",
344 .of_match_table = mtk_smi_larb_of_ids,
348 static const struct of_device_id mtk_smi_common_of_ids[] = {
350 .compatible = "mediatek,mt8173-smi-common",
351 .data = (void *)MTK_SMI_GEN2
354 .compatible = "mediatek,mt2701-smi-common",
355 .data = (void *)MTK_SMI_GEN1
358 .compatible = "mediatek,mt2712-smi-common",
359 .data = (void *)MTK_SMI_GEN2
364 static int mtk_smi_common_probe(struct platform_device *pdev)
366 struct device *dev = &pdev->dev;
367 struct mtk_smi *common;
368 struct resource *res;
369 enum mtk_smi_gen smi_gen;
372 common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
377 common->clk_apb = devm_clk_get(dev, "apb");
378 if (IS_ERR(common->clk_apb))
379 return PTR_ERR(common->clk_apb);
381 common->clk_smi = devm_clk_get(dev, "smi");
382 if (IS_ERR(common->clk_smi))
383 return PTR_ERR(common->clk_smi);
386 * for mtk smi gen 1, we need to get the ao(always on) base to config
387 * m4u port, and we need to enable the aync clock for transform the smi
388 * clock into emi clock domain, but for mtk smi gen2, there's no smi ao
391 smi_gen = (enum mtk_smi_gen)of_device_get_match_data(dev);
392 if (smi_gen == MTK_SMI_GEN1) {
393 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
394 common->smi_ao_base = devm_ioremap_resource(dev, res);
395 if (IS_ERR(common->smi_ao_base))
396 return PTR_ERR(common->smi_ao_base);
398 common->clk_async = devm_clk_get(dev, "async");
399 if (IS_ERR(common->clk_async))
400 return PTR_ERR(common->clk_async);
402 ret = clk_prepare_enable(common->clk_async);
406 pm_runtime_enable(dev);
407 platform_set_drvdata(pdev, common);
411 static int mtk_smi_common_remove(struct platform_device *pdev)
413 pm_runtime_disable(&pdev->dev);
417 static struct platform_driver mtk_smi_common_driver = {
418 .probe = mtk_smi_common_probe,
419 .remove = mtk_smi_common_remove,
421 .name = "mtk-smi-common",
422 .of_match_table = mtk_smi_common_of_ids,
426 static int __init mtk_smi_init(void)
430 ret = platform_driver_register(&mtk_smi_common_driver);
432 pr_err("Failed to register SMI driver\n");
436 ret = platform_driver_register(&mtk_smi_larb_driver);
438 pr_err("Failed to register SMI-LARB driver\n");
444 platform_driver_unregister(&mtk_smi_common_driver);
448 module_init(mtk_smi_init);