From 11786c063959227d596d88f24926a3c819b43b4b Mon Sep 17 00:00:00 2001 From: Valentine Barshak Date: Thu, 8 Aug 2019 00:49:53 +0300 Subject: [PATCH 20/23] arm: renesas: v3msk: Add CPLD support This adds CPLD sysreset driver to the R-Car V3M SK board. Signed-off-by: Valentine Barshak --- arch/arm/dts/r8a77970-v3msk-u-boot.dts | 11 + board/renesas/v3msk/Makefile | 3 +- board/renesas/v3msk/cpld.c | 359 +++++++++++++++++++++++++++++++++ board/renesas/v3msk/v3msk.c | 2 + configs/r8a77970_v3msk_defconfig | 1 + 5 files changed, 375 insertions(+), 1 deletion(-) create mode 100644 board/renesas/v3msk/cpld.c diff --git a/arch/arm/dts/r8a77970-v3msk-u-boot.dts b/arch/arm/dts/r8a77970-v3msk-u-boot.dts index 65a3061..6ee06d7 100644 --- a/arch/arm/dts/r8a77970-v3msk-u-boot.dts +++ b/arch/arm/dts/r8a77970-v3msk-u-boot.dts @@ -13,6 +13,17 @@ aliases { spi0 = &rpc; }; + + cpld { + compatible = "renesas,v3msk-cpld"; + status = "okay"; + gpio-mdc = <&gpio1 21 0>; + gpio-mosi = <&gpio1 22 0>; + gpio-miso = <&gpio1 23 0>; + gpio-enablez = <&gpio1 19 0>; + /* Disable V3MSK Videobox Mini CANFD PHY */ + gpios = <&gpio0 12 0>, <&gpio0 14 0>; + }; }; &avb { diff --git a/board/renesas/v3msk/Makefile b/board/renesas/v3msk/Makefile index f1ce184..2625eb1 100644 --- a/board/renesas/v3msk/Makefile +++ b/board/renesas/v3msk/Makefile @@ -7,4 +7,5 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y := v3msk.o +obj-y := v3msk.o +obj-$(CONFIG_SYSRESET) += cpld.o diff --git a/board/renesas/v3msk/cpld.c b/board/renesas/v3msk/cpld.c new file mode 100644 index 0000000..2926ddb --- /dev/null +++ b/board/renesas/v3msk/cpld.c @@ -0,0 +1,359 @@ +/* + * V3MSK board CPLD access support + * + * Copyright (C) 2019 Renesas Electronics Corporation + * Copyright (C) 2019 Cogent Embedded, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include + +#define CPLD_ADDR_PRODUCT_L 0x000 /* R */ +#define CPLD_ADDR_PRODUCT_H 0x001 /* R */ +#define CPLD_ADDR_CPLD_VERSION_D 0x002 /* R */ +#define CPLD_ADDR_CPLD_VERSION_Y 0x003 /* R */ +#define CPLD_ADDR_MODE_SET_L 0x004 /* R/W */ +#define CPLD_ADDR_MODE_SET_H 0x005 /* R/W */ +#define CPLD_ADDR_MODE_APPLIED_L 0x006 /* R */ +#define CPLD_ADDR_MODE_APPLIED_H 0x007 /* R */ +#define CPLD_ADDR_DIPSW 0x008 /* R */ +#define CPLD_ADDR_RESET 0x00A /* R/W */ +#define CPLD_ADDR_POWER_CFG 0x00B /* R/W */ +#define CPLD_ADDR_PERI_CFG1 0x00C /* R/W */ +#define CPLD_ADDR_PERI_CFG2 0x00D /* R/W */ +#define CPLD_ADDR_LEDS 0x00E /* R/W */ +#define CPLD_ADDR_PCB_VERSION 0x300 /* R */ +#define CPLD_ADDR_SOC_VERSION 0x301 /* R */ +#define CPLD_ADDR_PCB_SN_L 0x302 /* R */ +#define CPLD_ADDR_PCB_SN_H 0x303 /* R */ + +#if 0 +/* LSI pin pull-up control */ +#define PFC_PUEN2 0xE6060408 +#define PUEN_CANFD1_TX (1 << 29) +#endif + +#define MDIO_DELAY 10 /* microseconds */ + +#define mdio_bb_active_mdio(priv) dm_gpio_set_dir_flags(&priv->mosi, \ + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE) +#define mdio_bb_tristate_mdio(priv) dm_gpio_set_dir_flags(&priv->mosi, \ + GPIOD_IS_IN) +#define mdio_bb_set_mdio(priv, val) dm_gpio_set_value(&priv->mosi, val) +#define mdio_bb_get_mdio(priv) dm_gpio_get_value(&priv->miso) +#define mdio_bb_set_mdc(priv, val) dm_gpio_set_value(&priv->mdc, val) + +#define CPLD_MAX_GPIOS 2 + +struct renesas_v3msk_sysreset_priv { + struct gpio_desc miso; + struct gpio_desc mosi; + struct gpio_desc mdc; + struct gpio_desc enablez; + /* V3MSK Videobox Mini board has CANFD PHY connected + * we must shutdown this chip to use bb pins + */ + struct gpio_desc gpios[CPLD_MAX_GPIOS]; +}; + +static void mdio_bb_delay(void) +{ + udelay(MDIO_DELAY); +} + +/* Send the preamble, address, and register (common to read and write) */ +static void mdio_bb_pre(struct renesas_v3msk_sysreset_priv *priv, + u8 op, u8 addr, u8 reg) +{ + int i; + + /* 32-bit preamble */ + mdio_bb_active_mdio(priv); + mdio_bb_set_mdio(priv, 1); + for (i = 0; i < 32; i++) { + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + } + /* send the ST (2-bits of '01') */ + mdio_bb_set_mdio(priv, 0); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + mdio_bb_set_mdio(priv, 1); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + /* send the OP (2-bits of Opcode: '10'-read, '01'-write) */ + mdio_bb_set_mdio(priv, op >> 1); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + mdio_bb_set_mdio(priv, op & 1); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + /* send the PA5 (5-bits of PHY address) */ + for (i = 0; i < 5; i++) { + mdio_bb_set_mdio(priv, addr & 0x10); /* MSB first */ + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + addr <<= 1; + } + /* send the RA5 (5-bits of register address) */ + for (i = 0; i < 5; i++) { + mdio_bb_set_mdio(priv, reg & 0x10); /* MSB first */ + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + reg <<= 1; + } +} + +static int mdio_bb_read(struct renesas_v3msk_sysreset_priv *priv, + u8 addr, u8 reg) +{ + int i; + u16 data = 0; + + mdio_bb_pre(priv, 2, addr, reg); + /* tri-state MDIO */ + mdio_bb_tristate_mdio(priv); + /* read TA (2-bits of turn-around, last bit must be '0') */ + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + /* check the turnaround bit: the PHY should drive line to zero */ + if (mdio_bb_get_mdio(priv) != 0) { + printf("PHY didn't drive TA low\n"); + for (i = 0; i < 32; i++) { + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + } + /* There is no PHY, set value to 0xFFFF */ + return 0xFFFF; + } + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + /* read 16-bits of data */ + for (i = 0; i < 16; i++) { + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + data <<= 1; + data |= mdio_bb_get_mdio(priv); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + } + + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + + debug("cpld_read(0x%x) @ 0x%x = 0x%04x\n", reg, addr, data); + + return data; +} + +static void mdio_bb_write(struct renesas_v3msk_sysreset_priv *priv, + u8 addr, u8 reg, u16 val) +{ + int i; + + mdio_bb_pre(priv, 1, addr, reg); + /* send the TA (2-bits of turn-around '10') */ + mdio_bb_set_mdio(priv, 1); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + mdio_bb_set_mdio(priv, 0); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + /* write 16-bits of data */ + for (i = 0; i < 16; i++) { + mdio_bb_set_mdio(priv, val & 0x8000); /* MSB first */ + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); + val <<= 1; + } + /* tri-state MDIO */ + mdio_bb_tristate_mdio(priv); + mdio_bb_set_mdc(priv, 0); + mdio_bb_delay(); + mdio_bb_set_mdc(priv, 1); + mdio_bb_delay(); +} + +static u16 cpld_read(struct udevice *dev, u16 addr) +{ + struct renesas_v3msk_sysreset_priv *priv = dev_get_priv(dev); + + /* random flash reads require 2 reads: first read is unreliable */ + if (addr >= CPLD_ADDR_PCB_VERSION) + mdio_bb_read(priv, addr >> 5, addr & 0x1f); + + return mdio_bb_read(priv, addr >> 5, addr & 0x1f); +} + +static void cpld_write(struct udevice *dev, u16 addr, u16 data) +{ + struct renesas_v3msk_sysreset_priv *priv = dev_get_priv(dev); + + mdio_bb_write(priv, addr >> 5, addr & 0x1f, data); +} + +static int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + struct udevice *dev; + u16 addr, val; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_SYSRESET, + DM_GET_DRIVER(sysreset_renesas_v3msk), + &dev); + if (ret) + return ret; + + if (argc == 2 && strcmp(argv[1], "info") == 0) { + printf("Product: 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_PRODUCT_H) << 16) | + cpld_read(dev, CPLD_ADDR_PRODUCT_L)); + printf("CPLD version: 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_CPLD_VERSION_Y) << 16) | + cpld_read(dev, CPLD_ADDR_CPLD_VERSION_D)); + printf("Mode setting (MD0..26): 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_MODE_APPLIED_H) << 16) | + cpld_read(dev, CPLD_ADDR_MODE_APPLIED_L)); + printf("DIPSW (SW4, SW5): 0x%02x, 0x%x\n", + (cpld_read(dev, CPLD_ADDR_DIPSW) & 0xff) ^ 0xff, + (cpld_read(dev, CPLD_ADDR_DIPSW) >> 8) ^ 0xf); + printf("Power config: 0x%08x\n", + cpld_read(dev, CPLD_ADDR_POWER_CFG)); + printf("Periferals config: 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_PERI_CFG2) << 16) | + cpld_read(dev, CPLD_ADDR_PERI_CFG1)); + printf("PCB version: %d.%d\n", + cpld_read(dev, CPLD_ADDR_PCB_VERSION) >> 8, + cpld_read(dev, CPLD_ADDR_PCB_VERSION) & 0xff); + printf("SOC version: %d.%d\n", + cpld_read(dev, CPLD_ADDR_SOC_VERSION) >> 8, + cpld_read(dev, CPLD_ADDR_SOC_VERSION) & 0xff); + printf("PCB S/N: %d\n", + (cpld_read(dev, CPLD_ADDR_PCB_SN_H) << 16 ) | + cpld_read(dev, CPLD_ADDR_PCB_SN_L)); + return 0; + } + + if (argc < 3) + return CMD_RET_USAGE; + + addr = simple_strtoul(argv[2], NULL, 16); + if (!(addr >= CPLD_ADDR_PRODUCT_L && addr <= CPLD_ADDR_LEDS)) { + printf("cpld invalid addr\n"); + return CMD_RET_USAGE; + } + + if (argc == 3 && strcmp(argv[1], "read") == 0) { + printf("0x%x\n", cpld_read(dev, addr)); + } else if (argc == 4 && strcmp(argv[1], "write") == 0) { + val = simple_strtoul(argv[3], NULL, 16); + cpld_write(dev, addr, val); + } + + return 0; +} + +U_BOOT_CMD( + cpld, 4, 1, do_cpld, + "CPLD access", + "info\n" + "cpld read addr\n" + "cpld write addr val\n" +); + +static int renesas_v3msk_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + cpld_write(dev, CPLD_ADDR_RESET, 1); + + return -EINPROGRESS; +} + +static int renesas_v3msk_sysreset_probe(struct udevice *dev) +{ + struct renesas_v3msk_sysreset_priv *priv = dev_get_priv(dev); + + if (gpio_request_by_name(dev, "gpio-miso", 0, &priv->miso, + GPIOD_IS_IN)) + return -EINVAL; + + if (gpio_request_by_name(dev, "gpio-mosi", 0, &priv->mosi, + GPIOD_IS_OUT)) + return -EINVAL; + + if (gpio_request_by_name(dev, "gpio-mdc", 0, &priv->mdc, + GPIOD_IS_OUT)) + return -EINVAL; + + if (gpio_request_by_name(dev, "gpio-enablez", 0, &priv->enablez, + GPIOD_IS_OUT)) + return -EINVAL; + + /* V3MSK Videobox Mini board has CANFD PHY connected + * we must shutdown this chip to use bb pins + */ + gpio_request_list_by_name(dev, "gpios", priv->gpios, CPLD_MAX_GPIOS, + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); + +#if 0 + /* PULL-UP on MISO line */ + setbits_le32(PFC_PUEN2, PUEN_CANFD1_TX); +#endif + return 0; +} + +static struct sysreset_ops renesas_v3msk_sysreset = { + .request = renesas_v3msk_sysreset_request, +}; + +static const struct udevice_id renesas_v3msk_sysreset_ids[] = { + { .compatible = "renesas,v3msk-cpld" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(sysreset_renesas_v3msk) = { + .name = "renesas_v3msk_sysreset", + .id = UCLASS_SYSRESET, + .ops = &renesas_v3msk_sysreset, + .probe = renesas_v3msk_sysreset_probe, + .of_match = renesas_v3msk_sysreset_ids, + .priv_auto_alloc_size = sizeof(struct renesas_v3msk_sysreset_priv), +}; diff --git a/board/renesas/v3msk/v3msk.c b/board/renesas/v3msk/v3msk.c index 4a1c546..d1c4f26 100644 --- a/board/renesas/v3msk/v3msk.c +++ b/board/renesas/v3msk/v3msk.c @@ -84,6 +84,7 @@ int dram_init_banksize(void) return 0; } +#if !CONFIG_IS_ENABLED(SYSRESET) #define RST_BASE 0xE6160000 #define RST_CA57RESCNT (RST_BASE + 0x40) #define RST_CA53RESCNT (RST_BASE + 0x44) @@ -105,3 +106,4 @@ void reset_cpu(ulong addr) else hang(); } +#endif diff --git a/configs/r8a77970_v3msk_defconfig b/configs/r8a77970_v3msk_defconfig index 7de8af5..5ee014b 100644 --- a/configs/r8a77970_v3msk_defconfig +++ b/configs/r8a77970_v3msk_defconfig @@ -67,6 +67,7 @@ CONFIG_SCIF_CONSOLE=y CONFIG_SPI=y CONFIG_DM_SPI=y CONFIG_RENESAS_RPC_SPI=y +CONFIG_SYSRESET=y CONFIG_USB=y CONFIG_DM_USB=y CONFIG_USB_XHCI_HCD=y -- 2.7.4