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linux/drivers/memory/mtk-smi.c
Chengci.Xu 673e71df5c memory: mtk-smi: mt8188: Add SMI Support 
Add mt8188 smi common & larb support

Signed-off-by: Chengci.Xu <chengci.xu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Yong Wu <yong.wu@mediatek.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220817124608.10062-5-chengci.xu@mediatek.com
2022-08-30 20:54:05 +03:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2015-2016 MediaTek Inc.
* Author: Yong Wu <yong.wu@mediatek.com>
*/
#include <linux/arm-smccc.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/soc/mediatek/mtk_sip_svc.h>
#include <soc/mediatek/smi.h>
#include <dt-bindings/memory/mt2701-larb-port.h>
#include <dt-bindings/memory/mtk-memory-port.h>
/* SMI COMMON */
#define SMI_L1LEN 0x100
#define SMI_L1_ARB 0x200
#define SMI_BUS_SEL 0x220
#define SMI_BUS_LARB_SHIFT(larbid) ((larbid) << 1)
/* All are MMU0 defaultly. Only specialize mmu1 here. */
#define F_MMU1_LARB(larbid) (0x1 << SMI_BUS_LARB_SHIFT(larbid))
#define SMI_READ_FIFO_TH 0x230
#define SMI_M4U_TH 0x234
#define SMI_FIFO_TH1 0x238
#define SMI_FIFO_TH2 0x23c
#define SMI_DCM 0x300
#define SMI_DUMMY 0x444
/* SMI LARB */
#define SMI_LARB_SLP_CON 0xc
#define SLP_PROT_EN BIT(0)
#define SLP_PROT_RDY BIT(16)
#define SMI_LARB_CMD_THRT_CON 0x24
#define SMI_LARB_THRT_RD_NU_LMT_MSK GENMASK(7, 4)
#define SMI_LARB_THRT_RD_NU_LMT (5 << 4)
#define SMI_LARB_SW_FLAG 0x40
#define SMI_LARB_SW_FLAG_1 0x1
#define SMI_LARB_OSTDL_PORT 0x200
#define SMI_LARB_OSTDL_PORTx(id) (SMI_LARB_OSTDL_PORT + (((id) & 0x1f) << 2))
/* Below are about mmu enable registers, they are different in SoCs */
/* gen1: mt2701 */
#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))
/* gen2: */
/* mt8167 */
#define MT8167_SMI_LARB_MMU_EN 0xfc0
/* mt8173 */
#define MT8173_SMI_LARB_MMU_EN 0xf00
/* general */
#define SMI_LARB_NONSEC_CON(id) (0x380 + ((id) * 4))
#define F_MMU_EN BIT(0)
#define BANK_SEL(id) ({ \
u32 _id = (id) & 0x3; \
(_id << 8 | _id << 10 | _id << 12 | _id << 14); \
})
#define SMI_COMMON_INIT_REGS_NR 6
#define SMI_LARB_PORT_NR_MAX 32
#define MTK_SMI_FLAG_THRT_UPDATE BIT(0)
#define MTK_SMI_FLAG_SW_FLAG BIT(1)
#define MTK_SMI_FLAG_SLEEP_CTL BIT(2)
#define MTK_SMI_FLAG_CFG_PORT_SEC_CTL BIT(3)
#define MTK_SMI_CAPS(flags, _x) (!!((flags) & (_x)))
struct mtk_smi_reg_pair {
unsigned int offset;
u32 value;
};
enum mtk_smi_type {
MTK_SMI_GEN1,
MTK_SMI_GEN2, /* gen2 smi common */
MTK_SMI_GEN2_SUB_COMM, /* gen2 smi sub common */
};
/* larbs: Require apb/smi clocks while gals is optional. */
static const char * const mtk_smi_larb_clks[] = {"apb", "smi", "gals"};
#define MTK_SMI_LARB_REQ_CLK_NR 2
#define MTK_SMI_LARB_OPT_CLK_NR 1
/*
* common: Require these four clocks in has_gals case. Otherwise, only apb/smi are required.
* sub common: Require apb/smi/gals0 clocks in has_gals case. Otherwise, only apb/smi are required.
*/
static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1"};
#define MTK_SMI_CLK_NR_MAX ARRAY_SIZE(mtk_smi_common_clks)
#define MTK_SMI_COM_REQ_CLK_NR 2
#define MTK_SMI_COM_GALS_REQ_CLK_NR MTK_SMI_CLK_NR_MAX
#define MTK_SMI_SUB_COM_GALS_REQ_CLK_NR 3
struct mtk_smi_common_plat {
enum mtk_smi_type type;
bool has_gals;
u32 bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
const struct mtk_smi_reg_pair *init;
};
struct mtk_smi_larb_gen {
int port_in_larb[MTK_LARB_NR_MAX + 1];
int (*config_port)(struct device *dev);
unsigned int larb_direct_to_common_mask;
unsigned int flags_general;
const u8 (*ostd)[SMI_LARB_PORT_NR_MAX];
};
struct mtk_smi {
struct device *dev;
unsigned int clk_num;
struct clk_bulk_data clks[MTK_SMI_CLK_NR_MAX];
struct clk *clk_async; /*only needed by mt2701*/
union {
void __iomem *smi_ao_base; /* only for gen1 */
void __iomem *base; /* only for gen2 */
};
struct device *smi_common_dev; /* for sub common */
const struct mtk_smi_common_plat *plat;
};
struct mtk_smi_larb { /* larb: local arbiter */
struct mtk_smi smi;
void __iomem *base;
struct device *smi_common_dev; /* common or sub-common dev */
const struct mtk_smi_larb_gen *larb_gen;
int larbid;
u32 *mmu;
unsigned char *bank;
};
static int
mtk_smi_larb_bind(struct device *dev, struct device *master, void *data)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
struct mtk_smi_larb_iommu *larb_mmu = data;
unsigned int i;
for (i = 0; i < MTK_LARB_NR_MAX; i++) {
if (dev == larb_mmu[i].dev) {
larb->larbid = i;
larb->mmu = &larb_mmu[i].mmu;
larb->bank = larb_mmu[i].bank;
return 0;
}
}
return -ENODEV;
}
static void
mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data)
{
/* Do nothing as the iommu is always enabled. */
}
static const struct component_ops mtk_smi_larb_component_ops = {
.bind = mtk_smi_larb_bind,
.unbind = mtk_smi_larb_unbind,
};
static int 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));
}
return 0;
}
static int mtk_smi_larb_config_port_mt8167(struct device *dev)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
return 0;
}
static int mtk_smi_larb_config_port_mt8173(struct device *dev)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
writel(*larb->mmu, larb->base + MT8173_SMI_LARB_MMU_EN);
return 0;
}
static int mtk_smi_larb_config_port_gen2_general(struct device *dev)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
u32 reg, flags_general = larb->larb_gen->flags_general;
const u8 *larbostd = larb->larb_gen->ostd ? larb->larb_gen->ostd[larb->larbid] : NULL;
struct arm_smccc_res res;
int i;
if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
return 0;
if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_THRT_UPDATE)) {
reg = readl_relaxed(larb->base + SMI_LARB_CMD_THRT_CON);
reg &= ~SMI_LARB_THRT_RD_NU_LMT_MSK;
reg |= SMI_LARB_THRT_RD_NU_LMT;
writel_relaxed(reg, larb->base + SMI_LARB_CMD_THRT_CON);
}
if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_SW_FLAG))
writel_relaxed(SMI_LARB_SW_FLAG_1, larb->base + SMI_LARB_SW_FLAG);
for (i = 0; i < SMI_LARB_PORT_NR_MAX && larbostd && !!larbostd[i]; i++)
writel_relaxed(larbostd[i], larb->base + SMI_LARB_OSTDL_PORTx(i));
/*
* When mmu_en bits are in security world, the bank_sel still is in the
* LARB_NONSEC_CON below. And the mmu_en bits of LARB_NONSEC_CON have no
* effect in this case.
*/
if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_CFG_PORT_SEC_CTL)) {
arm_smccc_smc(MTK_SIP_KERNEL_IOMMU_CONTROL, IOMMU_ATF_CMD_CONFIG_SMI_LARB,
larb->larbid, *larb->mmu, 0, 0, 0, 0, &res);
if (res.a0 != 0) {
dev_err(dev, "Enable iommu fail, ret %ld\n", res.a0);
return -EINVAL;
}
}
for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
reg |= F_MMU_EN;
reg |= BANK_SEL(larb->bank[i]);
writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
}
return 0;
}
static const u8 mtk_smi_larb_mt8188_ostd[][SMI_LARB_PORT_NR_MAX] = {
[0] = {0x02, 0x18, 0x22, 0x22, 0x01, 0x02, 0x0a,},
[1] = {0x12, 0x02, 0x14, 0x14, 0x01, 0x18, 0x0a,},
[2] = {0x12, 0x12, 0x12, 0x12, 0x0a,},
[3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
[4] = {0x06, 0x01, 0x17, 0x06, 0x0a, 0x07, 0x07,},
[5] = {0x02, 0x01, 0x04, 0x02, 0x06, 0x01, 0x06, 0x0a,},
[6] = {0x06, 0x01, 0x06, 0x0a,},
[7] = {0x0c, 0x0c, 0x12,},
[8] = {0x0c, 0x01, 0x0a, 0x05, 0x02, 0x03, 0x01, 0x01, 0x14, 0x14,
0x0a, 0x14, 0x1e, 0x01, 0x0c, 0x0a, 0x05, 0x02, 0x02, 0x05,
0x03, 0x01, 0x1e, 0x01, 0x05,},
[9] = {0x1e, 0x01, 0x0a, 0x0a, 0x01, 0x01, 0x03, 0x1e, 0x1e, 0x10,
0x07, 0x01, 0x0a, 0x06, 0x03, 0x03, 0x0e, 0x01, 0x04, 0x28,},
[10] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
[11] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
[12] = {0x03, 0x20, 0x01, 0x20, 0x01, 0x01, 0x14, 0x0a, 0x0a, 0x0c,
0x0a, 0x05, 0x02, 0x03, 0x02, 0x14, 0x0a, 0x0a, 0x14, 0x14,
0x14, 0x01, 0x01, 0x14, 0x1e, 0x01, 0x05, 0x03, 0x02, 0x28,},
[13] = {0x07, 0x02, 0x04, 0x02, 0x05, 0x05, 0x05, 0x05, 0x05, 0x05,
0x07, 0x02, 0x04, 0x02, 0x05, 0x05,},
[14] = {0x02, 0x02, 0x0c, 0x0c, 0x0c, 0x0c, 0x01, 0x01, 0x02, 0x02,
0x02, 0x02, 0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02,
0x02, 0x02, 0x01, 0x01,},
[15] = {0x0c, 0x0c, 0x02, 0x02, 0x02, 0x02, 0x01, 0x01, 0x0c, 0x0c,
0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x01, 0x02,
0x0c, 0x01, 0x01,},
[16] = {0x28, 0x28, 0x03, 0x01, 0x01, 0x03, 0x14, 0x14, 0x0a, 0x0d,
0x03, 0x05, 0x0e, 0x01, 0x01, 0x05, 0x06, 0x0d, 0x01,},
[17] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
[18] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
0x12, 0x02, 0x02, 0x0a, 0x16, 0x02, 0x04,},
[19] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
[20] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
[21] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
[22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,
0x01,},
[23] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x18, 0x01, 0x01,},
[24] = {0x12, 0x06, 0x12, 0x06,},
[25] = {0x01},
};
static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
[0] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb0 */
[1] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb1 */
[2] = {0x12, 0x12, 0x12, 0x12, 0x0a,}, /* ... */
[3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
[4] = {0x06, 0x01, 0x17, 0x06, 0x0a,},
[5] = {0x06, 0x01, 0x17, 0x06, 0x06, 0x01, 0x06, 0x0a,},
[6] = {0x06, 0x01, 0x06, 0x0a,},
[7] = {0x0c, 0x0c, 0x12,},
[8] = {0x0c, 0x0c, 0x12,},
[9] = {0x0a, 0x08, 0x04, 0x06, 0x01, 0x01, 0x10, 0x18, 0x11, 0x0a,
0x08, 0x04, 0x11, 0x06, 0x02, 0x06, 0x01, 0x11, 0x11, 0x06,},
[10] = {0x18, 0x08, 0x01, 0x01, 0x20, 0x12, 0x18, 0x06, 0x05, 0x10,
0x08, 0x08, 0x10, 0x08, 0x08, 0x18, 0x0c, 0x09, 0x0b, 0x0d,
0x0d, 0x06, 0x10, 0x10,},
[11] = {0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x01, 0x01, 0x01, 0x01,},
[12] = {0x09, 0x09, 0x05, 0x05, 0x0c, 0x18, 0x02, 0x02, 0x04, 0x02,},
[13] = {0x02, 0x02, 0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x08, 0x01,},
[14] = {0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x16, 0x01, 0x16, 0x01,
0x01, 0x02, 0x02, 0x08, 0x02,},
[15] = {},
[16] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
0x12, 0x02, 0x0a, 0x16, 0x02, 0x04,},
[17] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
[18] = {0x12, 0x06, 0x12, 0x06,},
[19] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
[20] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
[21] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
[22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
[23] = {0x18, 0x01,},
[24] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x01,
0x01, 0x01,},
[25] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
0x02, 0x01,},
[26] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
0x02, 0x01,},
[27] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
0x02, 0x01,},
[28] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
};
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 mtk_smi_larb_gen mtk_smi_larb_mt2712 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.larb_direct_to_common_mask = BIT(8) | BIT(9), /* bdpsys */
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt6779 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.larb_direct_to_common_mask =
BIT(4) | BIT(6) | BIT(11) | BIT(12) | BIT(13),
/* DUMMY | IPU0 | IPU1 | CCU | MDLA */
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8167 = {
/* mt8167 do not need the port in larb */
.config_port = mtk_smi_larb_config_port_mt8167,
};
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_mt8173,
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8183 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.larb_direct_to_common_mask = BIT(2) | BIT(3) | BIT(7),
/* IPU0 | IPU1 | CCU */
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8186 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.flags_general = MTK_SMI_FLAG_SLEEP_CTL,
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8188 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.flags_general = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
MTK_SMI_FLAG_SLEEP_CTL | MTK_SMI_FLAG_CFG_PORT_SEC_CTL,
.ostd = mtk_smi_larb_mt8188_ostd,
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
};
static const struct mtk_smi_larb_gen mtk_smi_larb_mt8195 = {
.config_port = mtk_smi_larb_config_port_gen2_general,
.flags_general = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG |
MTK_SMI_FLAG_SLEEP_CTL,
.ostd = mtk_smi_larb_mt8195_ostd,
};
static const struct of_device_id mtk_smi_larb_of_ids[] = {
{.compatible = "mediatek,mt2701-smi-larb", .data = &mtk_smi_larb_mt2701},
{.compatible = "mediatek,mt2712-smi-larb", .data = &mtk_smi_larb_mt2712},
{.compatible = "mediatek,mt6779-smi-larb", .data = &mtk_smi_larb_mt6779},
{.compatible = "mediatek,mt6795-smi-larb", .data = &mtk_smi_larb_mt8173},
{.compatible = "mediatek,mt8167-smi-larb", .data = &mtk_smi_larb_mt8167},
{.compatible = "mediatek,mt8173-smi-larb", .data = &mtk_smi_larb_mt8173},
{.compatible = "mediatek,mt8183-smi-larb", .data = &mtk_smi_larb_mt8183},
{.compatible = "mediatek,mt8186-smi-larb", .data = &mtk_smi_larb_mt8186},
{.compatible = "mediatek,mt8188-smi-larb", .data = &mtk_smi_larb_mt8188},
{.compatible = "mediatek,mt8192-smi-larb", .data = &mtk_smi_larb_mt8192},
{.compatible = "mediatek,mt8195-smi-larb", .data = &mtk_smi_larb_mt8195},
{}
};
static int mtk_smi_larb_sleep_ctrl_enable(struct mtk_smi_larb *larb)
{
int ret;
u32 tmp;
writel_relaxed(SLP_PROT_EN, larb->base + SMI_LARB_SLP_CON);
ret = readl_poll_timeout_atomic(larb->base + SMI_LARB_SLP_CON,
tmp, !!(tmp & SLP_PROT_RDY), 10, 1000);
if (ret) {
/* TODO: Reset this larb if it fails here. */
dev_err(larb->smi.dev, "sleep ctrl is not ready(0x%x).\n", tmp);
}
return ret;
}
static void mtk_smi_larb_sleep_ctrl_disable(struct mtk_smi_larb *larb)
{
writel_relaxed(0, larb->base + SMI_LARB_SLP_CON);
}
static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev)
{
struct platform_device *smi_com_pdev;
struct device_node *smi_com_node;
struct device *smi_com_dev;
struct device_link *link;
smi_com_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
if (!smi_com_node)
return -EINVAL;
smi_com_pdev = of_find_device_by_node(smi_com_node);
of_node_put(smi_com_node);
if (smi_com_pdev) {
/* smi common is the supplier, Make sure it is ready before */
if (!platform_get_drvdata(smi_com_pdev)) {
put_device(&smi_com_pdev->dev);
return -EPROBE_DEFER;
}
smi_com_dev = &smi_com_pdev->dev;
link = device_link_add(dev, smi_com_dev,
DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
if (!link) {
dev_err(dev, "Unable to link smi-common dev\n");
put_device(&smi_com_pdev->dev);
return -ENODEV;
}
*com_dev = smi_com_dev;
} else {
dev_err(dev, "Failed to get the smi_common device\n");
return -EINVAL;
}
return 0;
}
static int 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)
{
int i, ret;
for (i = 0; i < clk_nr_required; i++)
smi->clks[i].id = clks[i];
ret = devm_clk_bulk_get(dev, clk_nr_required, smi->clks);
if (ret)
return ret;
for (i = clk_nr_required; i < clk_nr_required + clk_nr_optional; i++)
smi->clks[i].id = clks[i];
ret = devm_clk_bulk_get_optional(dev, clk_nr_optional,
smi->clks + clk_nr_required);
smi->clk_num = clk_nr_required + clk_nr_optional;
return ret;
}
static int mtk_smi_larb_probe(struct platform_device *pdev)
{
struct mtk_smi_larb *larb;
struct device *dev = &pdev->dev;
int ret;
larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
if (!larb)
return -ENOMEM;
larb->larb_gen = of_device_get_match_data(dev);
larb->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(larb->base))
return PTR_ERR(larb->base);
ret = mtk_smi_dts_clk_init(dev, &larb->smi, mtk_smi_larb_clks,
MTK_SMI_LARB_REQ_CLK_NR, MTK_SMI_LARB_OPT_CLK_NR);
if (ret)
return ret;
larb->smi.dev = dev;
ret = mtk_smi_device_link_common(dev, &larb->smi_common_dev);
if (ret < 0)
return ret;
pm_runtime_enable(dev);
platform_set_drvdata(pdev, larb);
ret = component_add(dev, &mtk_smi_larb_component_ops);
if (ret)
goto err_pm_disable;
return 0;
err_pm_disable:
pm_runtime_disable(dev);
device_link_remove(dev, larb->smi_common_dev);
return ret;
}
static int mtk_smi_larb_remove(struct platform_device *pdev)
{
struct mtk_smi_larb *larb = platform_get_drvdata(pdev);
device_link_remove(&pdev->dev, larb->smi_common_dev);
pm_runtime_disable(&pdev->dev);
component_del(&pdev->dev, &mtk_smi_larb_component_ops);
return 0;
}
static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
int ret;
ret = clk_bulk_prepare_enable(larb->smi.clk_num, larb->smi.clks);
if (ret)
return ret;
if (MTK_SMI_CAPS(larb->larb_gen->flags_general, MTK_SMI_FLAG_SLEEP_CTL))
mtk_smi_larb_sleep_ctrl_disable(larb);
/* Configure the basic setting for this larb */
return larb_gen->config_port(dev);
}
static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
{
struct mtk_smi_larb *larb = dev_get_drvdata(dev);
int ret;
if (MTK_SMI_CAPS(larb->larb_gen->flags_general, MTK_SMI_FLAG_SLEEP_CTL)) {
ret = mtk_smi_larb_sleep_ctrl_enable(larb);
if (ret)
return ret;
}
clk_bulk_disable_unprepare(larb->smi.clk_num, larb->smi.clks);
return 0;
}
static const struct dev_pm_ops smi_larb_pm_ops = {
SET_RUNTIME_PM_OPS(mtk_smi_larb_suspend, mtk_smi_larb_resume, NULL)
SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static struct platform_driver mtk_smi_larb_driver = {
.probe = mtk_smi_larb_probe,
.remove = mtk_smi_larb_remove,
.driver = {
.name = "mtk-smi-larb",
.of_match_table = mtk_smi_larb_of_ids,
.pm = &smi_larb_pm_ops,
}
};
static const struct mtk_smi_reg_pair mtk_smi_common_mt6795_init[SMI_COMMON_INIT_REGS_NR] = {
{SMI_L1_ARB, 0x1b},
{SMI_M4U_TH, 0xce810c85},
{SMI_FIFO_TH1, 0x43214c8},
{SMI_READ_FIFO_TH, 0x191f},
};
static const struct mtk_smi_reg_pair mtk_smi_common_mt8195_init[SMI_COMMON_INIT_REGS_NR] = {
{SMI_L1LEN, 0xb},
{SMI_M4U_TH, 0xe100e10},
{SMI_FIFO_TH1, 0x506090a},
{SMI_FIFO_TH2, 0x506090a},
{SMI_DCM, 0x4f1},
{SMI_DUMMY, 0x1},
};
static const struct mtk_smi_common_plat mtk_smi_common_gen1 = {
.type = MTK_SMI_GEN1,
};
static const struct mtk_smi_common_plat mtk_smi_common_gen2 = {
.type = MTK_SMI_GEN2,
};
static const struct mtk_smi_common_plat mtk_smi_common_mt6779 = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(4) |
F_MMU1_LARB(5) | F_MMU1_LARB(6) | F_MMU1_LARB(7),
};
static const struct mtk_smi_common_plat mtk_smi_common_mt6795 = {
.type = MTK_SMI_GEN2,
.bus_sel = F_MMU1_LARB(0),
.init = mtk_smi_common_mt6795_init,
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
F_MMU1_LARB(7),
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8186 = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(4) | F_MMU1_LARB(7),
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vdo = {
.type = MTK_SMI_GEN2,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(5) | F_MMU1_LARB(7),
.init = mtk_smi_common_mt8195_init,
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8188_vpp = {
.type = MTK_SMI_GEN2,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
.init = mtk_smi_common_mt8195_init,
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
F_MMU1_LARB(6),
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vdo = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(3) | F_MMU1_LARB(5) |
F_MMU1_LARB(7),
.init = mtk_smi_common_mt8195_init,
};
static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vpp = {
.type = MTK_SMI_GEN2,
.has_gals = true,
.bus_sel = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
.init = mtk_smi_common_mt8195_init,
};
static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8195 = {
.type = MTK_SMI_GEN2_SUB_COMM,
.has_gals = true,
};
static const struct of_device_id mtk_smi_common_of_ids[] = {
{.compatible = "mediatek,mt2701-smi-common", .data = &mtk_smi_common_gen1},
{.compatible = "mediatek,mt2712-smi-common", .data = &mtk_smi_common_gen2},
{.compatible = "mediatek,mt6779-smi-common", .data = &mtk_smi_common_mt6779},
{.compatible = "mediatek,mt6795-smi-common", .data = &mtk_smi_common_mt6795},
{.compatible = "mediatek,mt8167-smi-common", .data = &mtk_smi_common_gen2},
{.compatible = "mediatek,mt8173-smi-common", .data = &mtk_smi_common_gen2},
{.compatible = "mediatek,mt8183-smi-common", .data = &mtk_smi_common_mt8183},
{.compatible = "mediatek,mt8186-smi-common", .data = &mtk_smi_common_mt8186},
{.compatible = "mediatek,mt8188-smi-common-vdo", .data = &mtk_smi_common_mt8188_vdo},
{.compatible = "mediatek,mt8188-smi-common-vpp", .data = &mtk_smi_common_mt8188_vpp},
{.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
{.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo},
{.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},
{.compatible = "mediatek,mt8195-smi-sub-common", .data = &mtk_smi_sub_common_mt8195},
{}
};
static int mtk_smi_common_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct mtk_smi *common;
int ret, clk_required = MTK_SMI_COM_REQ_CLK_NR;
common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
if (!common)
return -ENOMEM;
common->dev = dev;
common->plat = of_device_get_match_data(dev);
if (common->plat->has_gals) {
if (common->plat->type == MTK_SMI_GEN2)
clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
else if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
clk_required = MTK_SMI_SUB_COM_GALS_REQ_CLK_NR;
}
ret = mtk_smi_dts_clk_init(dev, common, mtk_smi_common_clks, clk_required, 0);
if (ret)
return ret;
/*
* 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.
*/
if (common->plat->type == MTK_SMI_GEN1) {
common->smi_ao_base = devm_platform_ioremap_resource(pdev, 0);
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);
ret = clk_prepare_enable(common->clk_async);
if (ret)
return ret;
} else {
common->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(common->base))
return PTR_ERR(common->base);
}
/* link its smi-common if this is smi-sub-common */
if (common->plat->type == MTK_SMI_GEN2_SUB_COMM) {
ret = mtk_smi_device_link_common(dev, &common->smi_common_dev);
if (ret < 0)
return ret;
}
pm_runtime_enable(dev);
platform_set_drvdata(pdev, common);
return 0;
}
static int mtk_smi_common_remove(struct platform_device *pdev)
{
struct mtk_smi *common = dev_get_drvdata(&pdev->dev);
if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
device_link_remove(&pdev->dev, common->smi_common_dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static int __maybe_unused mtk_smi_common_resume(struct device *dev)
{
struct mtk_smi *common = dev_get_drvdata(dev);
const struct mtk_smi_reg_pair *init = common->plat->init;
u32 bus_sel = common->plat->bus_sel; /* default is 0 */
int ret, i;
ret = clk_bulk_prepare_enable(common->clk_num, common->clks);
if (ret)
return ret;
if (common->plat->type != MTK_SMI_GEN2)
return 0;
for (i = 0; i < SMI_COMMON_INIT_REGS_NR && init && init[i].offset; i++)
writel_relaxed(init[i].value, common->base + init[i].offset);
writel(bus_sel, common->base + SMI_BUS_SEL);
return 0;
}
static int __maybe_unused mtk_smi_common_suspend(struct device *dev)
{
struct mtk_smi *common = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(common->clk_num, common->clks);
return 0;
}
static const struct dev_pm_ops smi_common_pm_ops = {
SET_RUNTIME_PM_OPS(mtk_smi_common_suspend, mtk_smi_common_resume, NULL)
SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static struct platform_driver mtk_smi_common_driver = {
.probe = mtk_smi_common_probe,
.remove = mtk_smi_common_remove,
.driver = {
.name = "mtk-smi-common",
.of_match_table = mtk_smi_common_of_ids,
.pm = &smi_common_pm_ops,
}
};
static struct platform_driver * const smidrivers[] = {
&mtk_smi_common_driver,
&mtk_smi_larb_driver,
};
static int __init mtk_smi_init(void)
{
return platform_register_drivers(smidrivers, ARRAY_SIZE(smidrivers));
}
module_init(mtk_smi_init);
static void __exit mtk_smi_exit(void)
{
platform_unregister_drivers(smidrivers, ARRAY_SIZE(smidrivers));
}
module_exit(mtk_smi_exit);
MODULE_DESCRIPTION("MediaTek SMI driver");
MODULE_LICENSE("GPL v2");
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