diff options
Diffstat (limited to 'drivers/memory/mtk-smi.c')
| -rw-r--r-- | drivers/memory/mtk-smi.c | 167 |
1 files changed, 149 insertions, 18 deletions
diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index f6b57579185a..4afbc412f959 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -21,19 +21,50 @@ #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <soc/mediatek/smi.h> +#include <dt-bindings/memory/mt2701-larb-port.h> #define SMI_LARB_MMU_EN 0xf00 +#define REG_SMI_SECUR_CON_BASE 0x5c0 + +/* every register control 8 port, register offset 0x4 */ +#define REG_SMI_SECUR_CON_OFFSET(id) (((id) >> 3) << 2) +#define REG_SMI_SECUR_CON_ADDR(id) \ + (REG_SMI_SECUR_CON_BASE + REG_SMI_SECUR_CON_OFFSET(id)) + +/* + * every port have 4 bit to control, bit[port + 3] control virtual or physical, + * bit[port + 2 : port + 1] control the domain, bit[port] control the security + * or non-security. + */ +#define SMI_SECUR_CON_VAL_MSK(id) (~(0xf << (((id) & 0x7) << 2))) +#define SMI_SECUR_CON_VAL_VIRT(id) BIT((((id) & 0x7) << 2) + 3) +/* mt2701 domain should be set to 3 */ +#define SMI_SECUR_CON_VAL_DOMAIN(id) (0x3 << ((((id) & 0x7) << 2) + 1)) + +struct mtk_smi_larb_gen { + int port_in_larb[MTK_LARB_NR_MAX + 1]; + void (*config_port)(struct device *); +}; struct mtk_smi { - struct device *dev; - struct clk *clk_apb, *clk_smi; + struct device *dev; + struct clk *clk_apb, *clk_smi; + struct clk *clk_async; /*only needed by mt2701*/ + void __iomem *smi_ao_base; }; struct mtk_smi_larb { /* larb: local arbiter */ - struct mtk_smi smi; - void __iomem *base; - struct device *smi_common_dev; - u32 *mmu; + struct mtk_smi smi; + void __iomem *base; + struct device *smi_common_dev; + const struct mtk_smi_larb_gen *larb_gen; + int larbid; + u32 *mmu; +}; + +enum mtk_smi_gen { + MTK_SMI_GEN1, + MTK_SMI_GEN2 }; static int mtk_smi_enable(const struct mtk_smi *smi) @@ -71,6 +102,7 @@ static void mtk_smi_disable(const struct mtk_smi *smi) int mtk_smi_larb_get(struct device *larbdev) { struct mtk_smi_larb *larb = dev_get_drvdata(larbdev); + const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen; struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev); int ret; @@ -87,7 +119,7 @@ int mtk_smi_larb_get(struct device *larbdev) } /* Configure the iommu info for this larb */ - writel(*larb->mmu, larb->base + SMI_LARB_MMU_EN); + larb_gen->config_port(larbdev); return 0; } @@ -126,6 +158,45 @@ mtk_smi_larb_bind(struct device *dev, struct device *master, void *data) return -ENODEV; } +static void mtk_smi_larb_config_port(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + + writel(*larb->mmu, larb->base + SMI_LARB_MMU_EN); +} + + +static void mtk_smi_larb_config_port_gen1(struct device *dev) +{ + struct mtk_smi_larb *larb = dev_get_drvdata(dev); + const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen; + struct mtk_smi *common = dev_get_drvdata(larb->smi_common_dev); + int i, m4u_port_id, larb_port_num; + u32 sec_con_val, reg_val; + + m4u_port_id = larb_gen->port_in_larb[larb->larbid]; + larb_port_num = larb_gen->port_in_larb[larb->larbid + 1] + - larb_gen->port_in_larb[larb->larbid]; + + for (i = 0; i < larb_port_num; i++, m4u_port_id++) { + if (*larb->mmu & BIT(i)) { + /* bit[port + 3] controls the virtual or physical */ + sec_con_val = SMI_SECUR_CON_VAL_VIRT(m4u_port_id); + } else { + /* do not need to enable m4u for this port */ + continue; + } + reg_val = readl(common->smi_ao_base + + REG_SMI_SECUR_CON_ADDR(m4u_port_id)); + reg_val &= SMI_SECUR_CON_VAL_MSK(m4u_port_id); + reg_val |= sec_con_val; + reg_val |= SMI_SECUR_CON_VAL_DOMAIN(m4u_port_id); + writel(reg_val, + common->smi_ao_base + + REG_SMI_SECUR_CON_ADDR(m4u_port_id)); + } +} + static void mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data) { @@ -137,6 +208,31 @@ static const struct component_ops mtk_smi_larb_component_ops = { .unbind = mtk_smi_larb_unbind, }; +static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = { + /* mt8173 do not need the port in larb */ + .config_port = mtk_smi_larb_config_port, +}; + +static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = { + .port_in_larb = { + LARB0_PORT_OFFSET, LARB1_PORT_OFFSET, + LARB2_PORT_OFFSET, LARB3_PORT_OFFSET + }, + .config_port = mtk_smi_larb_config_port_gen1, +}; + +static const struct of_device_id mtk_smi_larb_of_ids[] = { + { + .compatible = "mediatek,mt8173-smi-larb", + .data = &mtk_smi_larb_mt8173 + }, + { + .compatible = "mediatek,mt2701-smi-larb", + .data = &mtk_smi_larb_mt2701 + }, + {} +}; + static int mtk_smi_larb_probe(struct platform_device *pdev) { struct mtk_smi_larb *larb; @@ -144,14 +240,20 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *smi_node; struct platform_device *smi_pdev; + const struct of_device_id *of_id; if (!dev->pm_domain) return -EPROBE_DEFER; + of_id = of_match_node(mtk_smi_larb_of_ids, pdev->dev.of_node); + if (!of_id) + return -EINVAL; + larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL); if (!larb) return -ENOMEM; + larb->larb_gen = of_id->data; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); larb->base = devm_ioremap_resource(dev, res); if (IS_ERR(larb->base)) @@ -191,24 +293,34 @@ static int mtk_smi_larb_remove(struct platform_device *pdev) return 0; } -static const struct of_device_id mtk_smi_larb_of_ids[] = { - { .compatible = "mediatek,mt8173-smi-larb",}, - {} -}; - static struct platform_driver mtk_smi_larb_driver = { .probe = mtk_smi_larb_probe, - .remove = mtk_smi_larb_remove, + .remove = mtk_smi_larb_remove, .driver = { .name = "mtk-smi-larb", .of_match_table = mtk_smi_larb_of_ids, } }; +static const struct of_device_id mtk_smi_common_of_ids[] = { + { + .compatible = "mediatek,mt8173-smi-common", + .data = (void *)MTK_SMI_GEN2 + }, + { + .compatible = "mediatek,mt2701-smi-common", + .data = (void *)MTK_SMI_GEN1 + }, + {} +}; + static int mtk_smi_common_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct mtk_smi *common; + struct resource *res; + const struct of_device_id *of_id; + enum mtk_smi_gen smi_gen; if (!dev->pm_domain) return -EPROBE_DEFER; @@ -226,6 +338,29 @@ static int mtk_smi_common_probe(struct platform_device *pdev) if (IS_ERR(common->clk_smi)) return PTR_ERR(common->clk_smi); + of_id = of_match_node(mtk_smi_common_of_ids, pdev->dev.of_node); + if (!of_id) + return -EINVAL; + + /* + * for mtk smi gen 1, we need to get the ao(always on) base to config + * m4u port, and we need to enable the aync clock for transform the smi + * clock into emi clock domain, but for mtk smi gen2, there's no smi ao + * base. + */ + smi_gen = (enum mtk_smi_gen)of_id->data; + if (smi_gen == MTK_SMI_GEN1) { + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + common->smi_ao_base = devm_ioremap_resource(dev, res); + if (IS_ERR(common->smi_ao_base)) + return PTR_ERR(common->smi_ao_base); + + common->clk_async = devm_clk_get(dev, "async"); + if (IS_ERR(common->clk_async)) + return PTR_ERR(common->clk_async); + + clk_prepare_enable(common->clk_async); + } pm_runtime_enable(dev); platform_set_drvdata(pdev, common); return 0; @@ -237,11 +372,6 @@ static int mtk_smi_common_remove(struct platform_device *pdev) return 0; } -static const struct of_device_id mtk_smi_common_of_ids[] = { - { .compatible = "mediatek,mt8173-smi-common", }, - {} -}; - static struct platform_driver mtk_smi_common_driver = { .probe = mtk_smi_common_probe, .remove = mtk_smi_common_remove, @@ -272,4 +402,5 @@ err_unreg_smi: platform_driver_unregister(&mtk_smi_common_driver); return ret; } + subsys_initcall(mtk_smi_init); |