diff options
Diffstat (limited to 'board/renesas/v3hsk/cpld.c')
| -rw-r--r-- | board/renesas/v3hsk/cpld.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/board/renesas/v3hsk/cpld.c b/board/renesas/v3hsk/cpld.c new file mode 100644 index 0000000..6016f6d --- /dev/null +++ b/board/renesas/v3hsk/cpld.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * V3HSK board CPLD access support + * + * Copyright (C) 2019 Renesas Electronics Corporation + * Copyright (C) 2019 Cogent Embedded, Inc. + * + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <i2c.h> +#include <linux/err.h> +#include <sysreset.h> +#include <command.h> + +#define CPLD_ADDR_PRODUCT_0 0x0000 /* R */ +#define CPLD_ADDR_PRODUCT_1 0x0001 /* R */ +#define CPLD_ADDR_PRODUCT_2 0x0002 /* R */ +#define CPLD_ADDR_PRODUCT_3 0x0003 /* R */ +#define CPLD_ADDR_CPLD_VERSION_D 0x0004 /* R */ +#define CPLD_ADDR_CPLD_VERSION_M 0x0005 /* R */ +#define CPLD_ADDR_CPLD_VERSION_Y_0 0x0006 /* R */ +#define CPLD_ADDR_CPLD_VERSION_Y_1 0x0007 /* R */ +#define CPLD_ADDR_MODE_SET_0 0x0008 /* R */ +#define CPLD_ADDR_MODE_SET_1 0x0009 /* R */ +#define CPLD_ADDR_MODE_SET_2 0x000A /* R */ +#define CPLD_ADDR_MODE_SET_3 0x000B /* R */ +#define CPLD_ADDR_MODE_SET_4 0x000C /* R */ +#define CPLD_ADDR_MODE_LAST_0 0x0018 /* R */ +#define CPLD_ADDR_MODE_LAST_1 0x0019 /* R */ +#define CPLD_ADDR_MODE_LAST_2 0x001A /* R */ +#define CPLD_ADDR_MODE_LAST_3 0x001B /* R */ +#define CPLD_ADDR_MODE_LAST_4 0x001C /* R */ +#define CPLD_ADDR_DIPSW4 0x0020 /* R */ +#define CPLD_ADDR_DIPSW5 0x0021 /* R */ +#define CPLD_ADDR_RESET 0x0024 /* R/W */ +#define CPLD_ADDR_POWER_CFG 0x0025 /* R/W */ +#define CPLD_ADDR_PERI_CFG_0 0x0030 /* R/W */ +#define CPLD_ADDR_PERI_CFG_1 0x0031 /* R/W */ +#define CPLD_ADDR_PERI_CFG_2 0x0032 /* R/W */ +#define CPLD_ADDR_PERI_CFG_3 0x0033 /* R/W */ +#define CPLD_ADDR_LEDS 0x0034 /* R/W */ +#define CPLD_ADDR_LEDS_CFG 0x0035 /* R/W */ +#define CPLD_ADDR_UART_CFG 0x0036 /* R/W */ +#define CPLD_ADDR_UART_STATUS 0x0037 /* R */ + +#define CPLD_ADDR_PCB_VERSION_0 0x1000 /* R */ +#define CPLD_ADDR_PCB_VERSION_1 0x1001 /* R */ +#define CPLD_ADDR_SOC_VERSION_0 0x1002 /* R */ +#define CPLD_ADDR_SOC_VERSION_1 0x1003 /* R */ +#define CPLD_ADDR_PCB_SN_0 0x1004 /* R */ +#define CPLD_ADDR_PCB_SN_1 0x1005 /* R */ + +static u16 cpld_read(struct udevice *dev, u16 addr) +{ + u8 data[2]; + + /* Random flash reads require 2 reads: first read is unreliable */ + if (addr >= CPLD_ADDR_PCB_VERSION_0) + dm_i2c_read(dev, addr, data, 2); + + /* Only the second byte read is valid */ + dm_i2c_read(dev, addr, data, 2); + return data[1]; +} + +static void cpld_write(struct udevice *dev, u16 addr, u8 data) +{ + dm_i2c_write(dev, addr, &data, 1); +} + +static int do_cpld(struct cmd_tbl *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_DRIVER_GET(sysreset_renesas_v3hsk), + &dev); + if (ret) + return ret; + + if (argc == 2 && strcmp(argv[1], "info") == 0) { + printf("Product: 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_PRODUCT_3) << 24) | + (cpld_read(dev, CPLD_ADDR_PRODUCT_2) << 16) | + (cpld_read(dev, CPLD_ADDR_PRODUCT_1) << 8) | + cpld_read(dev, CPLD_ADDR_PRODUCT_0)); + printf("CPLD version: 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_CPLD_VERSION_Y_1) << 24) | + (cpld_read(dev, CPLD_ADDR_CPLD_VERSION_Y_0) << 16) | + (cpld_read(dev, CPLD_ADDR_CPLD_VERSION_M) << 8) | + cpld_read(dev, CPLD_ADDR_CPLD_VERSION_D)); + printf("Mode setting (MD0..26): 0x%08x\n", + (cpld_read(dev, CPLD_ADDR_MODE_LAST_3) << 24) | + (cpld_read(dev, CPLD_ADDR_MODE_LAST_2) << 16) | + (cpld_read(dev, CPLD_ADDR_MODE_LAST_1) << 8) | + cpld_read(dev, CPLD_ADDR_MODE_LAST_0)); + printf("DIPSW (SW4, SW5): 0x%02x, 0x%x\n", + cpld_read(dev, CPLD_ADDR_DIPSW4) ^ 0xff, + (cpld_read(dev, CPLD_ADDR_DIPSW5) ^ 0xff) & 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_CFG_3) << 24) | + (cpld_read(dev, CPLD_ADDR_PERI_CFG_2) << 16) | + (cpld_read(dev, CPLD_ADDR_PERI_CFG_1) << 8) | + cpld_read(dev, CPLD_ADDR_PERI_CFG_0)); + printf("PCB version: %d.%d\n", + cpld_read(dev, CPLD_ADDR_PCB_VERSION_1), + cpld_read(dev, CPLD_ADDR_PCB_VERSION_0)); + printf("SOC version: %d.%d\n", + cpld_read(dev, CPLD_ADDR_SOC_VERSION_1), + cpld_read(dev, CPLD_ADDR_SOC_VERSION_0)); + printf("PCB S/N: %d\n", + (cpld_read(dev, CPLD_ADDR_PCB_SN_1) << 8) | + cpld_read(dev, CPLD_ADDR_PCB_SN_0)); + return 0; + } + + if (argc < 3) + return CMD_RET_USAGE; + + addr = simple_strtoul(argv[2], NULL, 16); + if (!(addr >= CPLD_ADDR_PRODUCT_0 && addr <= CPLD_ADDR_UART_STATUS)) { + 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_v3hsk_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + cpld_write(dev, CPLD_ADDR_RESET, 1); + + return -EINPROGRESS; +} + +static int renesas_v3hsk_sysreset_probe(struct udevice *dev) +{ + if (device_get_uclass_id(dev->parent) != UCLASS_I2C) + return -EPROTONOSUPPORT; + + return 0; +} + +static struct sysreset_ops renesas_v3hsk_sysreset = { + .request = renesas_v3hsk_sysreset_request, +}; + +static const struct udevice_id renesas_v3hsk_sysreset_ids[] = { + { .compatible = "renesas,v3hsk-cpld" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(sysreset_renesas_v3hsk) = { + .name = "renesas_v3hsk_sysreset", + .id = UCLASS_SYSRESET, + .ops = &renesas_v3hsk_sysreset, + .probe = renesas_v3hsk_sysreset_probe, + .of_match = renesas_v3hsk_sysreset_ids, +}; |