*/
#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 */
#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;
}
}
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;
"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),
+};
projects / u-boot / commitdiff