diff options
| -rw-r--r-- | arch/arm/dts/ulcb.dtsi | 9 | ||||
| -rw-r--r-- | board/renesas/ulcb/cpld.c | 212 | ||||
| -rw-r--r-- | configs/r8a7795_ulcb_defconfig | 1 | ||||
| -rw-r--r-- | configs/r8a7796_ulcb_defconfig | 1 | ||||
| -rw-r--r-- | include/configs/ulcb.h | 13 |
5 files changed, 129 insertions, 107 deletions
diff --git a/arch/arm/dts/ulcb.dtsi b/arch/arm/dts/ulcb.dtsi index 9b9d70ea27..59fcf71182 100644 --- a/arch/arm/dts/ulcb.dtsi +++ b/arch/arm/dts/ulcb.dtsi @@ -24,6 +24,15 @@ stdout-path = "serial0:115200n8"; }; + cpld { + compatible = "renesas,ulcb-cpld"; + status = "okay"; + gpio-sck = <&gpio6 8 0>; + gpio-mosi = <&gpio6 7 0>; + gpio-miso = <&gpio6 10 0>; + gpio-sstbz = <&gpio2 3 0>; + }; + audio_clkout: audio-clkout { /* * This is same as <&rcar_sound 0> diff --git a/board/renesas/ulcb/cpld.c b/board/renesas/ulcb/cpld.c index a1fecf18e5..50de56837e 100644 --- a/board/renesas/ulcb/cpld.c +++ b/board/renesas/ulcb/cpld.c @@ -8,14 +8,12 @@ */ #include <common.h> -#include <spi.h> -#include <asm/io.h> #include <asm/gpio.h> - -#define SCLK (192 + 8) /* GPIO6 8 */ -#define SSTBZ (64 + 3) /* GPIO2 3 */ -#define MOSI (192 + 7) /* GPIO6 8 */ -#define MISO (192 + 10) /* GPIO6 10 */ +#include <asm/io.h> +#include <dm.h> +#include <errno.h> +#include <linux/err.h> +#include <sysreset.h> #define CPLD_ADDR_MODE 0x00 /* RW */ #define CPLD_ADDR_MUX 0x02 /* RW */ @@ -23,111 +21,89 @@ #define CPLD_ADDR_RESET 0x80 /* RW */ #define CPLD_ADDR_VERSION 0xFF /* R */ -static int cpld_initialized; - -int spi_cs_is_valid(unsigned int bus, unsigned int cs) -{ - /* Always valid */ - return 1; -} - -void spi_cs_activate(struct spi_slave *slave) -{ - /* Always active */ -} - -void spi_cs_deactivate(struct spi_slave *slave) -{ - /* Always active */ -} - -void ulcb_softspi_sda(int set) -{ - gpio_set_value(MOSI, set); -} +struct renesas_ulcb_sysreset_priv { + struct gpio_desc miso; + struct gpio_desc mosi; + struct gpio_desc sck; + struct gpio_desc sstbz; +}; -void ulcb_softspi_scl(int set) -{ - gpio_set_value(SCLK, set); -} - -unsigned char ulcb_softspi_read(void) -{ - return !!gpio_get_value(MISO); -} - -static void cpld_rw(u8 write) -{ - gpio_set_value(MOSI, write); - gpio_set_value(SSTBZ, 0); - gpio_set_value(SCLK, 1); - gpio_set_value(SCLK, 0); - gpio_set_value(SSTBZ, 1); -} - -static u32 cpld_read(u8 addr) +static u32 cpld_read(struct udevice *dev, u8 addr) { + struct renesas_ulcb_sysreset_priv *priv = dev_get_priv(dev); u32 data = 0; + int i; - spi_xfer(NULL, 8, &addr, NULL, SPI_XFER_BEGIN | SPI_XFER_END); - - cpld_rw(0); - - spi_xfer(NULL, 32, NULL, &data, SPI_XFER_BEGIN | SPI_XFER_END); - - return swab32(data); -} - -static void cpld_write(u8 addr, u32 data) -{ - data = swab32(data); - - spi_xfer(NULL, 32, &data, NULL, SPI_XFER_BEGIN | SPI_XFER_END); + for (i = 0; i < 8; i++) { + dm_gpio_set_value(&priv->mosi, !!(addr & 0x80)); /* MSB first */ + dm_gpio_set_value(&priv->sck, 1); + addr <<= 1; + dm_gpio_set_value(&priv->sck, 0); + } - spi_xfer(NULL, 8, NULL, &addr, SPI_XFER_BEGIN | SPI_XFER_END); + dm_gpio_set_value(&priv->mosi, 0); /* READ */ + dm_gpio_set_value(&priv->sstbz, 0); + dm_gpio_set_value(&priv->sck, 1); + dm_gpio_set_value(&priv->sck, 0); + dm_gpio_set_value(&priv->sstbz, 1); + + for (i = 0; i < 32; i++) { + dm_gpio_set_value(&priv->sck, 1); + data <<= 1; + data |= dm_gpio_get_value(&priv->miso); /* MSB first */ + dm_gpio_set_value(&priv->sck, 0); + } - cpld_rw(1); + return data; } -static void cpld_init(void) +static void cpld_write(struct udevice *dev, u8 addr, u32 data) { - if (cpld_initialized) - return; - - /* PULL-UP on MISO line */ - setbits_le32(PFC_PUEN5, PUEN_SSI_SDATA4); - - gpio_request(SCLK, NULL); - gpio_request(SSTBZ, NULL); - gpio_request(MOSI, NULL); - gpio_request(MISO, NULL); - - gpio_direction_output(SCLK, 0); - gpio_direction_output(SSTBZ, 1); - gpio_direction_output(MOSI, 0); - gpio_direction_input(MISO); + struct renesas_ulcb_sysreset_priv *priv = dev_get_priv(dev); + int i; + + for (i = 0; i < 32; i++) { + dm_gpio_set_value(&priv->mosi, data & (1 << 31)); /* MSB first */ + dm_gpio_set_value(&priv->sck, 1); + data <<= 1; + dm_gpio_set_value(&priv->sck, 0); + } - /* Dummy read */ - cpld_read(CPLD_ADDR_VERSION); + for (i = 0; i < 8; i++) { + dm_gpio_set_value(&priv->mosi, addr & 0x80); /* MSB first */ + dm_gpio_set_value(&priv->sck, 1); + addr <<= 1; + dm_gpio_set_value(&priv->sck, 0); + } - cpld_initialized = 1; + dm_gpio_set_value(&priv->mosi, 1); /* WRITE */ + dm_gpio_set_value(&priv->sstbz, 0); + dm_gpio_set_value(&priv->sck, 1); + dm_gpio_set_value(&priv->sck, 0); + dm_gpio_set_value(&priv->sstbz, 1); } static int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { + struct udevice *dev; u32 addr, val; + int ret; - cpld_init(); + ret = uclass_get_device_by_driver(UCLASS_SYSRESET, + DM_GET_DRIVER(sysreset_renesas_ulcb), + &dev); + if (ret) + return ret; if (argc == 2 && strcmp(argv[1], "info") == 0) { printf("CPLD version:\t\t\t0x%08x\n", - cpld_read(CPLD_ADDR_VERSION)); + cpld_read(dev, CPLD_ADDR_VERSION)); printf("H3 Mode setting (MD0..28):\t0x%08x\n", - cpld_read(CPLD_ADDR_MODE)); + cpld_read(dev, CPLD_ADDR_MODE)); printf("Multiplexer settings:\t\t0x%08x\n", - cpld_read(CPLD_ADDR_MUX)); + cpld_read(dev, CPLD_ADDR_MUX)); printf("DIPSW (SW6):\t\t\t0x%08x\n", - cpld_read(CPLD_ADDR_DIPSW6)); + cpld_read(dev, CPLD_ADDR_DIPSW6)); return 0; } @@ -143,10 +119,10 @@ static int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) } if (argc == 3 && strcmp(argv[1], "read") == 0) { - printf("0x%x\n", cpld_read(addr)); + 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(addr, val); + cpld_write(dev, addr, val); } return 0; @@ -160,8 +136,56 @@ U_BOOT_CMD( "cpld write addr val\n" ); -void reset_cpu(ulong addr) +static int renesas_ulcb_sysreset_request(struct udevice *dev, enum sysreset_t type) +{ + cpld_write(dev, CPLD_ADDR_RESET, 1); + + return -EINPROGRESS; +} + +static int renesas_ulcb_sysreset_probe(struct udevice *dev) { - cpld_init(); - cpld_write(CPLD_ADDR_RESET, 1); + struct renesas_ulcb_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-sck", 0, &priv->sck, + GPIOD_IS_OUT)) + return -EINVAL; + + if (gpio_request_by_name(dev, "gpio-sstbz", 0, &priv->sstbz, + GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE)) + return -EINVAL; + + if (gpio_request_by_name(dev, "gpio-mosi", 0, &priv->mosi, + GPIOD_IS_OUT)) + return -EINVAL; + + /* PULL-UP on MISO line */ + setbits_le32(PFC_PUEN5, PUEN_SSI_SDATA4); + + /* Dummy read */ + cpld_read(dev, CPLD_ADDR_VERSION); + + return 0; } + +static struct sysreset_ops renesas_ulcb_sysreset = { + .request = renesas_ulcb_sysreset_request, +}; + +static const struct udevice_id renesas_ulcb_sysreset_ids[] = { + { .compatible = "renesas,ulcb-cpld" }, + { } +}; + +U_BOOT_DRIVER(sysreset_renesas_ulcb) = { + .name = "renesas_ulcb_sysreset", + .id = UCLASS_SYSRESET, + .ops = &renesas_ulcb_sysreset, + .probe = renesas_ulcb_sysreset_probe, + .of_match = renesas_ulcb_sysreset_ids, + .priv_auto_alloc_size = sizeof(struct renesas_ulcb_sysreset_priv), +}; diff --git a/configs/r8a7795_ulcb_defconfig b/configs/r8a7795_ulcb_defconfig index 75316d7621..0959bb44c9 100644 --- a/configs/r8a7795_ulcb_defconfig +++ b/configs/r8a7795_ulcb_defconfig @@ -47,6 +47,7 @@ CONFIG_DM_REGULATOR=y CONFIG_DM_REGULATOR_FIXED=y CONFIG_DM_REGULATOR_GPIO=y CONFIG_SCIF_CONSOLE=y +CONFIG_SYSRESET=y CONFIG_USB=y CONFIG_DM_USB=y CONFIG_USB_XHCI_HCD=y diff --git a/configs/r8a7796_ulcb_defconfig b/configs/r8a7796_ulcb_defconfig index 9a55ba9597..fe0b4fc93d 100644 --- a/configs/r8a7796_ulcb_defconfig +++ b/configs/r8a7796_ulcb_defconfig @@ -48,6 +48,7 @@ CONFIG_DM_REGULATOR=y CONFIG_DM_REGULATOR_FIXED=y CONFIG_DM_REGULATOR_GPIO=y CONFIG_SCIF_CONSOLE=y +CONFIG_SYSRESET=y CONFIG_USB=y CONFIG_DM_USB=y CONFIG_USB_XHCI_HCD=y diff --git a/include/configs/ulcb.h b/include/configs/ulcb.h index b330ea703a..dfd6436b3c 100644 --- a/include/configs/ulcb.h +++ b/include/configs/ulcb.h @@ -25,19 +25,6 @@ /* Generic Timer Definitions (use in assembler source) */ #define COUNTER_FREQUENCY 0xFE502A /* 16.66MHz from CPclk */ -/* CPLD SPI */ -#define CONFIG_CMD_SPI -#define CONFIG_SOFT_SPI -#define SPI_DELAY udelay(0) -#define SPI_SDA(val) ulcb_softspi_sda(val) -#define SPI_SCL(val) ulcb_softspi_scl(val) -#define SPI_READ ulcb_softspi_read() -#ifndef __ASSEMBLY__ -void ulcb_softspi_sda(int); -void ulcb_softspi_scl(int); -unsigned char ulcb_softspi_read(void); -#endif - /* Environment in eMMC, at the end of 2nd "boot sector" */ #define CONFIG_ENV_OFFSET (-CONFIG_ENV_SIZE) #define CONFIG_SYS_MMC_ENV_DEV 1 |