Add driver for the RPC block in Hyperflash mode. This driver allows access to a CFI Hyperflash attached to the RPC block and does not support RPC in SPI mode.

Signed-off-by: Marek Vasut marek.vasut+renesas@gmail.com Cc: Nobuhiro Iwamatsu iwamatsu@nigauri.org --- drivers/mtd/Kconfig | 7 + drivers/mtd/Makefile | 1 + drivers/mtd/renesas_rpc_hf.c | 398 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 406 insertions(+) create mode 100644 drivers/mtd/renesas_rpc_hf.c

diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 19579801d2..707359dca1 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -40,6 +40,13 @@ config FLASH_PIC32 This enables access to Microchip PIC32 internal non-CFI flash chips through PIC32 Non-Volatile-Memory Controller.

+config RENESAS_RPC_HF + bool "Renesas RCar Gen3 RPC Hyperflash driver" + depends on RCAR_GEN3 && MTD + help + This enables access to Hyperflash memory through the Renesas + RCar Gen3 RPC controller. + endmenu

source "drivers/mtd/nand/Kconfig" diff --git a/drivers/mtd/Makefile b/drivers/mtd/Makefile index 20c0d0af44..e46cbd8837 100644 --- a/drivers/mtd/Makefile +++ b/drivers/mtd/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_MW_EEPROM) += mw_eeprom.o obj-$(CONFIG_FLASH_PIC32) += pic32_flash.o obj-$(CONFIG_ST_SMI) += st_smi.o obj-$(CONFIG_STM32_FLASH) += stm32_flash.o +obj-$(CONFIG_RENESAS_RPC_HF) += renesas_rpc_hf.o diff --git a/drivers/mtd/renesas_rpc_hf.c b/drivers/mtd/renesas_rpc_hf.c new file mode 100644 index 0000000000..1ba6e354a0 --- /dev/null +++ b/drivers/mtd/renesas_rpc_hf.c @@ -0,0 +1,398 @@ +/* + * Renesas RCar Gen3 RPC Hyperflash driver + * + * Copyright (C) 2016 Renesas Electronics Corporation + * Copyright (C) 2016 Cogent Embedded, Inc. + * Copyright (C) 2017 Marek Vasut marek.vasut@gmail.com + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <asm/io.h> +#include <clk.h> +#include <dm.h> +#include <dm/of_access.h> +#include <errno.h> +#include <fdt_support.h> +#include <flash.h> +#include <mtd.h> +#include <wait_bit.h> +#include <mtd/cfi_flash.h> + +#define RPC_CMNCR 0x0000 /* R/W */ +#define RPC_CMNCR_MD BIT(31) +#define RPC_CMNCR_MOIIO0(val) (((val) & 0x3) << 16) +#define RPC_CMNCR_MOIIO1(val) (((val) & 0x3) << 18) +#define RPC_CMNCR_MOIIO2(val) (((val) & 0x3) << 20) +#define RPC_CMNCR_MOIIO3(val) (((val) & 0x3) << 22) +#define RPC_CMNCR_MOIIO_HIZ (RPC_CMNCR_MOIIO0(3) | RPC_CMNCR_MOIIO1(3) | \ + RPC_CMNCR_MOIIO2(3) | RPC_CMNCR_MOIIO3(3)) +#define RPC_CMNCR_IO0FV(val) (((val) & 0x3) << 8) +#define RPC_CMNCR_IO2FV(val) (((val) & 0x3) << 12) +#define RPC_CMNCR_IO3FV(val) (((val) & 0x3) << 14) +#define RPC_CMNCR_IOFV_HIZ (RPC_CMNCR_IO0FV(3) | RPC_CMNCR_IO2FV(3) | \ + RPC_CMNCR_IO3FV(3)) +#define RPC_CMNCR_BSZ(val) (((val) & 0x3) << 0) + +#define RPC_SSLDR 0x0004 /* R/W */ +#define RPC_SSLDR_SPNDL(d) (((d) & 0x7) << 16) +#define RPC_SSLDR_SLNDL(d) (((d) & 0x7) << 8) +#define RPC_SSLDR_SCKDL(d) (((d) & 0x7) << 0) + +#define RPC_DRCR 0x000C /* R/W */ +#define RPC_DRCR_SSLN BIT(24) +#define RPC_DRCR_RBURST(v) (((v) & 0x1F) << 16) +#define RPC_DRCR_RCF BIT(9) +#define RPC_DRCR_RBE BIT(8) +#define RPC_DRCR_SSLE BIT(0) + +#define RPC_DRCMR 0x0010 /* R/W */ +#define RPC_DRCMR_CMD(c) (((c) & 0xFF) << 16) +#define RPC_DRCMR_OCMD(c) (((c) & 0xFF) << 0) + +#define RPC_DREAR 0x0014 /* R/W */ +#define RPC_DREAR_EAV(v) (((v) & 0xFF) << 16) +#define RPC_DREAR_EAC(v) (((v) & 0x7) << 0) + +#define RPC_DROPR 0x0018 /* R/W */ +#define RPC_DROPR_OPD3(o) (((o) & 0xFF) << 24) +#define RPC_DROPR_OPD2(o) (((o) & 0xFF) << 16) +#define RPC_DROPR_OPD1(o) (((o) & 0xFF) << 8) +#define RPC_DROPR_OPD0(o) (((o) & 0xFF) << 0) + +#define RPC_DRENR 0x001C /* R/W */ +#define RPC_DRENR_CDB(o) (u32)((((o) & 0x3) << 30)) +#define RPC_DRENR_OCDB(o) (((o) & 0x3) << 28) +#define RPC_DRENR_ADB(o) (((o) & 0x3) << 24) +#define RPC_DRENR_OPDB(o) (((o) & 0x3) << 20) +#define RPC_DRENR_SPIDB(o) (((o) & 0x3) << 16) +#define RPC_DRENR_DME BIT(15) +#define RPC_DRENR_CDE BIT(14) +#define RPC_DRENR_OCDE BIT(12) +#define RPC_DRENR_ADE(v) (((v) & 0xF) << 8) +#define RPC_DRENR_OPDE(v) (((v) & 0xF) << 4) + +#define RPC_SMCR 0x0020 /* R/W */ +#define RPC_SMCR_SSLKP BIT(8) +#define RPC_SMCR_SPIRE BIT(2) +#define RPC_SMCR_SPIWE BIT(1) +#define RPC_SMCR_SPIE BIT(0) + +#define RPC_SMCMR 0x0024 /* R/W */ +#define RPC_SMCMR_CMD(c) (((c) & 0xFF) << 16) +#define RPC_SMCMR_OCMD(c) (((c) & 0xFF) << 0) + +#define RPC_SMADR 0x0028 /* R/W */ +#define RPC_SMOPR 0x002C /* R/W */ +#define RPC_SMOPR_OPD0(o) (((o) & 0xFF) << 0) +#define RPC_SMOPR_OPD1(o) (((o) & 0xFF) << 8) +#define RPC_SMOPR_OPD2(o) (((o) & 0xFF) << 16) +#define RPC_SMOPR_OPD3(o) (((o) & 0xFF) << 24) + +#define RPC_SMENR 0x0030 /* R/W */ +#define RPC_SMENR_CDB(o) (((o) & 0x3) << 30) +#define RPC_SMENR_OCDB(o) (((o) & 0x3) << 28) +#define RPC_SMENR_ADB(o) (((o) & 0x3) << 24) +#define RPC_SMENR_OPDB(o) (((o) & 0x3) << 20) +#define RPC_SMENR_SPIDB(o) (((o) & 0x3) << 16) +#define RPC_SMENR_DME BIT(15) +#define RPC_SMENR_CDE BIT(14) +#define RPC_SMENR_OCDE BIT(12) +#define RPC_SMENR_ADE(v) (((v) & 0xF) << 8) +#define RPC_SMENR_OPDE(v) (((v) & 0xF) << 4) +#define RPC_SMENR_SPIDE(v) (((v) & 0xF) << 0) + +#define RPC_SMRDR0 0x0038 /* R */ +#define RPC_SMRDR1 0x003C /* R */ +#define RPC_SMWDR0 0x0040 /* R/W */ +#define RPC_SMWDR1 0x0044 /* R/W */ +#define RPC_CMNSR 0x0048 /* R */ +#define RPC_CMNSR_SSLF BIT(1) +#define RPC_CMNSR_TEND BIT(0) + +#define RPC_DRDMCR 0x0058 /* R/W */ +#define RPC_DRDMCR_DMCYC(v) (((v) & 0xF) << 0) + +#define RPC_DRDRENR 0x005C /* R/W */ +#define RPC_DRDRENR_HYPE (0x5 << 12) +#define RPC_DRDRENR_ADDRE BIT(8) +#define RPC_DRDRENR_OPDRE BIT(4) +#define RPC_DRDRENR_DRDRE BIT(0) + +#define RPC_SMDMCR 0x0060 /* R/W */ +#define RPC_SMDMCR_DMCYC(v) (((v) & 0xF) << 0) + +#define RPC_SMDRENR 0x0064 /* R/W */ +#define RPC_SMDRENR_HYPE (0x5 << 12) +#define RPC_SMDRENR_ADDRE BIT(8) +#define RPC_SMDRENR_OPDRE BIT(4) +#define RPC_SMDRENR_SPIDRE BIT(0) + +#define RPC_PHYCNT 0x007C /* R/W */ +#define RPC_PHYCNT_CAL BIT(31) +#define PRC_PHYCNT_OCTA_AA BIT(22) +#define PRC_PHYCNT_OCTA_SA BIT(23) +#define PRC_PHYCNT_EXDS BIT(21) +#define RPC_PHYCNT_OCT BIT(20) +#define RPC_PHYCNT_WBUF2 BIT(4) +#define RPC_PHYCNT_WBUF BIT(2) +#define RPC_PHYCNT_MEM(v) (((v) & 0x3) << 0) + +#define RPC_PHYINT 0x0088 /* R/W */ +#define RPC_PHYINT_RSTEN BIT(18) +#define RPC_PHYINT_WPEN BIT(17) +#define RPC_PHYINT_INTEN BIT(16) +#define RPC_PHYINT_RST BIT(2) +#define RPC_PHYINT_WP BIT(1) +#define RPC_PHYINT_INT BIT(0) + +#define RPC_WBUF 0x8000 /* R/W size=4/8/16/32/64Bytes */ +#define RPC_WBUF_SIZE 0x100 + +static phys_addr_t rpc_base; + +enum rpc_hf_size { + RPC_HF_SIZE_16BIT = RPC_SMENR_SPIDE(0x8), + RPC_HF_SIZE_32BIT = RPC_SMENR_SPIDE(0xC), + RPC_HF_SIZE_64BIT = RPC_SMENR_SPIDE(0xF), +}; + +static int rpc_hf_wait_tend(void) +{ + void __iomem *reg = (void __iomem *)rpc_base + RPC_CMNSR; + return wait_for_bit_le32(reg, RPC_CMNSR_TEND, true, 1000, 0); +} + +static int rpc_hf_mode(bool man) +{ + int ret; + + ret = rpc_hf_wait_tend(); + if (ret) + return ret; + + clrsetbits_le32(rpc_base + RPC_PHYCNT, + RPC_PHYCNT_WBUF | RPC_PHYCNT_WBUF2 | + RPC_PHYCNT_CAL | RPC_PHYCNT_MEM(3), + RPC_PHYCNT_CAL | RPC_PHYCNT_MEM(3)); + + clrsetbits_le32(rpc_base + RPC_CMNCR, + RPC_CMNCR_MD | RPC_CMNCR_BSZ(3), + RPC_CMNCR_MOIIO_HIZ | RPC_CMNCR_IOFV_HIZ | + (man ? RPC_CMNCR_MD : 0) | RPC_CMNCR_BSZ(1)); + + if (man) + return 0; + + writel(RPC_DRCR_RBURST(0x1F) | RPC_DRCR_RCF | RPC_DRCR_RBE, + rpc_base + RPC_DRCR); + + writel(RPC_DRCMR_CMD(0xA0), rpc_base + RPC_DRCMR); + writel(RPC_DRENR_CDB(2) | RPC_DRENR_OCDB(2) | RPC_DRENR_ADB(2) | + RPC_DRENR_SPIDB(2) | RPC_DRENR_CDE | RPC_DRENR_OCDE | + RPC_DRENR_ADE(4), rpc_base + RPC_DRENR); + writel(RPC_DRDMCR_DMCYC(0xE), rpc_base + RPC_DRDMCR); + writel(RPC_DRDRENR_HYPE | RPC_DRDRENR_ADDRE | RPC_DRDRENR_DRDRE, + rpc_base + RPC_DRDRENR); + + /* Dummy read */ + readl(rpc_base + RPC_DRCR); + + return 0; +} + +static int rpc_hf_xfer(void *addr, u64 wdata, u64 *rdata, + enum rpc_hf_size size, bool write) +{ + int ret; + u32 val; + + ret = rpc_hf_mode(1); + if (ret) + return ret; + + /* Submit HF address, SMCMR CMD[7] ~= CA Bit# 47 (R/nW) */ + writel(write ? 0 : RPC_SMCMR_CMD(0x80), rpc_base + RPC_SMCMR); + writel((uintptr_t)addr >> 1, rpc_base + RPC_SMADR); + writel(0x0, rpc_base + RPC_SMOPR); + + writel(RPC_SMDRENR_HYPE | RPC_SMDRENR_ADDRE | RPC_SMDRENR_SPIDRE, + rpc_base + RPC_SMDRENR); + + val = RPC_SMENR_CDB(2) | RPC_SMENR_OCDB(2) | + RPC_SMENR_ADB(2) | RPC_SMENR_SPIDB(2) | + RPC_SMENR_CDE | RPC_SMENR_OCDE | RPC_SMENR_ADE(4) | size; + + if (write) { + writel(val, rpc_base + RPC_SMENR); + + if (size == RPC_HF_SIZE_64BIT) + writeq(cpu_to_be64(wdata), rpc_base + RPC_SMWDR0); + else + writel(cpu_to_be32(wdata), rpc_base + RPC_SMWDR0); + + writel(RPC_SMCR_SPIWE | RPC_SMCR_SPIE, rpc_base + RPC_SMCR); + } else { + val |= RPC_SMENR_DME; + + writel(RPC_SMDMCR_DMCYC(0xE), rpc_base + RPC_SMDMCR); + + writel(val, rpc_base + RPC_SMENR); + + writel(RPC_SMCR_SPIRE | RPC_SMCR_SPIE, rpc_base + RPC_SMCR); + + ret = rpc_hf_wait_tend(); + if (ret) + return ret; + + if (size == RPC_HF_SIZE_64BIT) + *rdata = be64_to_cpu(readq(rpc_base + RPC_SMRDR0)); + else + *rdata = be32_to_cpu(readl(rpc_base + RPC_SMRDR0)); + } + + return rpc_hf_mode(0); +} + +static void rpc_hf_write_cmd(void *addr, u64 wdata, enum rpc_hf_size size) +{ + int ret; + + ret = rpc_hf_xfer(addr, wdata, NULL, size, 1); + if (ret) + printf("RPC: Write failed, ret=%i\n", ret); +} + +static u64 rpc_hf_read_reg(void *addr, enum rpc_hf_size size) +{ + u64 rdata = 0; + int ret; + + ret = rpc_hf_xfer(addr, 0, &rdata, size, 0); + if (ret) + printf("RPC: Read failed, ret=%i\n", ret); + + return rdata; +} + +void flash_write8(u8 value, void *addr) +{ + rpc_hf_write_cmd(addr, value, RPC_HF_SIZE_16BIT); +} + +void flash_write16(u16 value, void *addr) +{ + rpc_hf_write_cmd(addr, value, RPC_HF_SIZE_16BIT); +} + +void flash_write32(u32 value, void *addr) +{ + rpc_hf_write_cmd(addr, value, RPC_HF_SIZE_32BIT); +} + +void flash_write64(u64 value, void *addr) +{ + rpc_hf_write_cmd(addr, value, RPC_HF_SIZE_64BIT); +} + +u8 flash_read8(void *addr) +{ + return rpc_hf_read_reg(addr, RPC_HF_SIZE_16BIT); +} + +u16 flash_read16(void *addr) +{ + return rpc_hf_read_reg(addr, RPC_HF_SIZE_16BIT); +} + +u32 flash_read32(void *addr) +{ + return rpc_hf_read_reg(addr, RPC_HF_SIZE_32BIT); +} + +u64 flash_read64(void *addr) +{ + return rpc_hf_read_reg(addr, RPC_HF_SIZE_64BIT); +} + +static int rpc_hf_bind(struct udevice *parent) +{ + const void *fdt = gd->fdt_blob; + ofnode node; + int ret, off; + + /* + * Check if there are any SPI NOR child nodes, if so, do NOT bind + * as this controller will be operated by the QSPI driver instead. + */ + dev_for_each_subnode(node, parent) { + off = ofnode_to_offset(node); + + ret = fdt_node_check_compatible(fdt, off, "spi-flash"); + if (!ret) + return -ENODEV; + + ret = fdt_node_check_compatible(fdt, off, "jedec,spi-nor"); + if (!ret) + return -ENODEV; + } + + return 0; +} + +static int rpc_hf_probe(struct udevice *dev) +{ + void *blob = (void *)gd->fdt_blob; + const fdt32_t *cell; + int node = dev_of_offset(dev); + int parent, addrc, sizec, len, ret; + struct clk clk; + phys_addr_t flash_base; + + parent = fdt_parent_offset(blob, node); + fdt_support_default_count_cells(blob, parent, &addrc, &sizec); + cell = fdt_getprop(blob, node, "reg", &len); + if (!cell) + return -ENOENT; + + if (addrc != 2 || sizec != 2) + return -EINVAL; + + + ret = clk_get_by_index(dev, 0, &clk); + if (ret < 0) { + dev_err(dev, "Failed to get RPC clock\n"); + return ret; + } + + ret = clk_enable(&clk); + clk_free(&clk); + if (ret) { + dev_err(dev, "Failed to enable RPC clock\n"); + return ret; + } + + rpc_base = fdt_translate_address(blob, node, cell); + flash_base = fdt_translate_address(blob, node, cell + addrc + sizec); + + flash_info[0].dev = dev; + flash_info[0].base = flash_base; + cfi_flash_num_flash_banks = 1; + gd->bd->bi_flashstart = flash_base; + + return 0; +} + +static const struct udevice_id rpc_hf_ids[] = { + { .compatible = "renesas,rpc" }, + {} +}; + +U_BOOT_DRIVER(rpc_hf) = { + .name = "rpc_hf", + .id = UCLASS_MTD, + .of_match = rpc_hf_ids, + .bind = rpc_hf_bind, + .probe = rpc_hf_probe, +};