+// SPDX-License-Identifier: GPL-2.0+
/*
* TI QSPI driver
*
* Copyright (C) 2013, Texas Instruments, Incorporated
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/omap.h>
#include <malloc.h>
#include <spi.h>
+#include <dm.h>
#include <asm/gpio.h>
#include <asm/omap_gpio.h>
#include <asm/omap_common.h>
#include <asm/ti-common/ti-edma3.h>
+#include <linux/kernel.h>
+#include <regmap.h>
+#include <syscon.h>
+
+DECLARE_GLOBAL_DATA_PTR;
/* ti qpsi register bit masks */
#define QSPI_TIMEOUT 2000000
-#define QSPI_FCLK 192000000
+#define QSPI_FCLK 192000000
+#define QSPI_DRA7XX_FCLK 76800000
+#define QSPI_WLEN_MAX_BITS 128
+#define QSPI_WLEN_MAX_BYTES (QSPI_WLEN_MAX_BITS >> 3)
+#define QSPI_WLEN_MASK QSPI_WLEN(QSPI_WLEN_MAX_BITS)
/* clock control */
#define QSPI_CLK_EN BIT(31)
#define QSPI_CLK_DIV_MAX 0xffff
#define QSPI_XFER_DONE QSPI_WC
#define MM_SWITCH 0x01
#define MEM_CS(cs) ((cs + 1) << 8)
-#define MEM_CS_UNSELECT 0xfffff0ff
+#define MEM_CS_UNSELECT 0xfffff8ff
#define MMAP_START_ADDR_DRA 0x5c000000
#define MMAP_START_ADDR_AM43x 0x30000000
#define CORE_CTRL_IO 0x4a002558
#define QSPI_CMD_READ (0x3 << 0)
-#define QSPI_CMD_READ_QUAD (0x6b << 0)
+#define QSPI_CMD_READ_DUAL (0x6b << 0)
+#define QSPI_CMD_READ_QUAD (0x6c << 0)
#define QSPI_CMD_READ_FAST (0x0b << 0)
-#define QSPI_SETUP0_NUM_A_BYTES (0x2 << 8)
+#define QSPI_SETUP0_NUM_A_BYTES (0x3 << 8)
#define QSPI_SETUP0_NUM_D_BYTES_NO_BITS (0x0 << 10)
#define QSPI_SETUP0_NUM_D_BYTES_8_BITS (0x1 << 10)
#define QSPI_SETUP0_READ_NORMAL (0x0 << 12)
+#define QSPI_SETUP0_READ_DUAL (0x1 << 12)
#define QSPI_SETUP0_READ_QUAD (0x3 << 12)
-#define QSPI_CMD_WRITE (0x2 << 16)
+#define QSPI_CMD_WRITE (0x12 << 16)
#define QSPI_NUM_DUMMY_BITS (0x0 << 24)
/* ti qspi register set */
/* ti qspi priv */
struct ti_qspi_priv {
+#ifndef CONFIG_DM_SPI
struct spi_slave slave;
+#else
+ void *memory_map;
+ uint max_hz;
+ u32 num_cs;
+#endif
struct ti_qspi_regs *base;
void *ctrl_mod_mmap;
+ ulong fclk;
unsigned int mode;
u32 cmd;
u32 dc;
{
uint clk_div;
- debug("ti_spi_set_speed: hz: %d, clock divider %d\n", hz, clk_div);
-
if (!hz)
clk_div = 0;
else
- clk_div = (QSPI_FCLK / hz) - 1;
+ clk_div = DIV_ROUND_UP(priv->fclk, hz) - 1;
+
+ /* truncate clk_div value to QSPI_CLK_DIV_MAX */
+ if (clk_div > QSPI_CLK_DIV_MAX)
+ clk_div = QSPI_CLK_DIV_MAX;
+
+ debug("ti_spi_set_speed: hz: %d, clock divider %d\n", hz, clk_div);
/* disable SCLK */
writel(readl(&priv->base->clk_ctrl) & ~QSPI_CLK_EN,
&priv->base->clk_ctrl);
-
- /* assign clk_div values */
- if (clk_div < 0)
- clk_div = 0;
- else if (clk_div > QSPI_CLK_DIV_MAX)
- clk_div = QSPI_CLK_DIV_MAX;
-
- /* enable SCLK */
+ /* enable SCLK and program the clk divider */
writel(QSPI_CLK_EN | clk_div, &priv->base->clk_ctrl);
}
priv->cmd |= QSPI_3_PIN;
priv->cmd |= 0xfff;
-/* FIXME: This delay is required for successfull
- * completion of read/write/erase. Once its root
- * caused, it will be remove from the driver.
- */
-#ifdef CONFIG_AM43XX
- udelay(100);
-#endif
- while (words--) {
+ while (words) {
+ u8 xfer_len = 0;
+
if (txp) {
- debug("tx cmd %08x dc %08x data %02x\n",
- priv->cmd | QSPI_WR_SNGL, priv->dc, *txp);
- writel(*txp++, &priv->base->data);
- writel(priv->cmd | QSPI_WR_SNGL,
- &priv->base->cmd);
+ u32 cmd = priv->cmd;
+
+ if (words >= QSPI_WLEN_MAX_BYTES) {
+ u32 *txbuf = (u32 *)txp;
+ u32 data;
+
+ data = cpu_to_be32(*txbuf++);
+ writel(data, &priv->base->data3);
+ data = cpu_to_be32(*txbuf++);
+ writel(data, &priv->base->data2);
+ data = cpu_to_be32(*txbuf++);
+ writel(data, &priv->base->data1);
+ data = cpu_to_be32(*txbuf++);
+ writel(data, &priv->base->data);
+ cmd &= ~QSPI_WLEN_MASK;
+ cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS);
+ xfer_len = QSPI_WLEN_MAX_BYTES;
+ } else {
+ writeb(*txp, &priv->base->data);
+ xfer_len = 1;
+ }
+ debug("tx cmd %08x dc %08x\n",
+ cmd | QSPI_WR_SNGL, priv->dc);
+ writel(cmd | QSPI_WR_SNGL, &priv->base->cmd);
status = readl(&priv->base->status);
timeout = QSPI_TIMEOUT;
while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
}
status = readl(&priv->base->status);
}
+ txp += xfer_len;
debug("tx done, status %08x\n", status);
}
if (rxp) {
- priv->cmd |= QSPI_RD_SNGL;
debug("rx cmd %08x dc %08x\n",
- priv->cmd, priv->dc);
- #ifdef CONFIG_DRA7XX
- udelay(500);
- #endif
- writel(priv->cmd, &priv->base->cmd);
+ ((u32)(priv->cmd | QSPI_RD_SNGL)), priv->dc);
+ writel(priv->cmd | QSPI_RD_SNGL, &priv->base->cmd);
status = readl(&priv->base->status);
timeout = QSPI_TIMEOUT;
while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
status = readl(&priv->base->status);
}
*rxp++ = readl(&priv->base->data);
+ xfer_len = 1;
debug("rx done, status %08x, read %02x\n",
status, *(rxp-1));
}
+ words -= xfer_len;
}
/* Terminate frame */
}
/* TODO: control from sf layer to here through dm-spi */
-#ifdef CONFIG_TI_EDMA3
+#if defined(CONFIG_TI_EDMA3) && !defined(CONFIG_DMA)
void spi_flash_copy_mmap(void *data, void *offset, size_t len)
{
unsigned int addr = (unsigned int) (data);
}
#endif
+#ifndef CONFIG_DM_SPI
+
static inline struct ti_qspi_priv *to_ti_qspi_priv(struct spi_slave *slave)
{
return container_of(slave, struct ti_qspi_priv, slave);
QSPI_SETUP0_NUM_D_BYTES_8_BITS |
QSPI_SETUP0_READ_QUAD | QSPI_CMD_WRITE |
QSPI_NUM_DUMMY_BITS);
- slave->mode_rx = SPI_RX_QUAD;
+ slave->mode |= SPI_RX_QUAD;
#else
memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES |
QSPI_SETUP0_NUM_D_BYTES_NO_BITS |
priv->base = (struct ti_qspi_regs *)QSPI_BASE;
priv->mode = mode;
-#if defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX)
+#if defined(CONFIG_DRA7XX)
priv->ctrl_mod_mmap = (void *)CORE_CTRL_IO;
priv->slave.memory_map = (void *)MMAP_START_ADDR_DRA;
+ priv->fclk = QSPI_DRA7XX_FCLK;
#else
priv->slave.memory_map = (void *)MMAP_START_ADDR_AM43x;
+ priv->fclk = QSPI_FCLK;
#endif
ti_spi_set_speed(priv, max_hz);
priv->slave.bus, priv->slave.cs, bitlen, flags);
return __ti_qspi_xfer(priv, bitlen, dout, din, flags, priv->slave.cs);
}
+
+#else /* CONFIG_DM_SPI */
+
+static void __ti_qspi_setup_memorymap(struct ti_qspi_priv *priv,
+ struct spi_slave *slave,
+ bool enable)
+{
+ u32 memval;
+ u32 mode = slave->mode & (SPI_RX_QUAD | SPI_RX_DUAL);
+
+ if (!enable) {
+ writel(0, &priv->base->setup0);
+ return;
+ }
+
+ memval = QSPI_SETUP0_NUM_A_BYTES | QSPI_CMD_WRITE | QSPI_NUM_DUMMY_BITS;
+
+ switch (mode) {
+ case SPI_RX_QUAD:
+ memval |= QSPI_CMD_READ_QUAD;
+ memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
+ memval |= QSPI_SETUP0_READ_QUAD;
+ slave->mode |= SPI_RX_QUAD;
+ break;
+ case SPI_RX_DUAL:
+ memval |= QSPI_CMD_READ_DUAL;
+ memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
+ memval |= QSPI_SETUP0_READ_DUAL;
+ break;
+ default:
+ memval |= QSPI_CMD_READ;
+ memval |= QSPI_SETUP0_NUM_D_BYTES_NO_BITS;
+ memval |= QSPI_SETUP0_READ_NORMAL;
+ break;
+ }
+
+ writel(memval, &priv->base->setup0);
+}
+
+
+static int ti_qspi_set_speed(struct udevice *bus, uint max_hz)
+{
+ struct ti_qspi_priv *priv = dev_get_priv(bus);
+
+ ti_spi_set_speed(priv, max_hz);
+
+ return 0;
+}
+
+static int ti_qspi_set_mode(struct udevice *bus, uint mode)
+{
+ struct ti_qspi_priv *priv = dev_get_priv(bus);
+ return __ti_qspi_set_mode(priv, mode);
+}
+
+static int ti_qspi_claim_bus(struct udevice *dev)
+{
+ struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
+ struct spi_slave *slave = dev_get_parent_priv(dev);
+ struct ti_qspi_priv *priv;
+ struct udevice *bus;
+
+ bus = dev->parent;
+ priv = dev_get_priv(bus);
+
+ if (slave_plat->cs > priv->num_cs) {
+ debug("invalid qspi chip select\n");
+ return -EINVAL;
+ }
+
+ __ti_qspi_setup_memorymap(priv, slave, true);
+
+ return __ti_qspi_claim_bus(priv, slave_plat->cs);
+}
+
+static int ti_qspi_release_bus(struct udevice *dev)
+{
+ struct spi_slave *slave = dev_get_parent_priv(dev);
+ struct ti_qspi_priv *priv;
+ struct udevice *bus;
+
+ bus = dev->parent;
+ priv = dev_get_priv(bus);
+
+ __ti_qspi_setup_memorymap(priv, slave, false);
+ __ti_qspi_release_bus(priv);
+
+ return 0;
+}
+
+static int ti_qspi_xfer(struct udevice *dev, unsigned int bitlen,
+ const void *dout, void *din, unsigned long flags)
+{
+ struct dm_spi_slave_platdata *slave = dev_get_parent_platdata(dev);
+ struct ti_qspi_priv *priv;
+ struct udevice *bus;
+
+ bus = dev->parent;
+ priv = dev_get_priv(bus);
+
+ if (slave->cs > priv->num_cs) {
+ debug("invalid qspi chip select\n");
+ return -EINVAL;
+ }
+
+ return __ti_qspi_xfer(priv, bitlen, dout, din, flags, slave->cs);
+}
+
+static int ti_qspi_probe(struct udevice *bus)
+{
+ struct ti_qspi_priv *priv = dev_get_priv(bus);
+
+ priv->fclk = dev_get_driver_data(bus);
+
+ return 0;
+}
+
+static void *map_syscon_chipselects(struct udevice *bus)
+{
+#if CONFIG_IS_ENABLED(SYSCON)
+ struct udevice *syscon;
+ struct regmap *regmap;
+ const fdt32_t *cell;
+ int len, err;
+
+ err = uclass_get_device_by_phandle(UCLASS_SYSCON, bus,
+ "syscon-chipselects", &syscon);
+ if (err) {
+ debug("%s: unable to find syscon device (%d)\n", __func__,
+ err);
+ return NULL;
+ }
+
+ regmap = syscon_get_regmap(syscon);
+ if (IS_ERR(regmap)) {
+ debug("%s: unable to find regmap (%ld)\n", __func__,
+ PTR_ERR(regmap));
+ return NULL;
+ }
+
+ cell = fdt_getprop(gd->fdt_blob, dev_of_offset(bus),
+ "syscon-chipselects", &len);
+ if (len < 2*sizeof(fdt32_t)) {
+ debug("%s: offset not available\n", __func__);
+ return NULL;
+ }
+
+ return fdtdec_get_number(cell + 1, 1) + regmap_get_range(regmap, 0);
+#else
+ fdt_addr_t addr;
+ addr = devfdt_get_addr_index(bus, 2);
+ return (addr == FDT_ADDR_T_NONE) ? NULL :
+ map_physmem(addr, 0, MAP_NOCACHE);
+#endif
+}
+
+static int ti_qspi_ofdata_to_platdata(struct udevice *bus)
+{
+ struct ti_qspi_priv *priv = dev_get_priv(bus);
+ const void *blob = gd->fdt_blob;
+ int node = dev_of_offset(bus);
+
+ priv->ctrl_mod_mmap = map_syscon_chipselects(bus);
+ priv->base = map_physmem(devfdt_get_addr(bus),
+ sizeof(struct ti_qspi_regs), MAP_NOCACHE);
+ priv->memory_map = map_physmem(devfdt_get_addr_index(bus, 1), 0,
+ MAP_NOCACHE);
+
+ priv->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", -1);
+ if (priv->max_hz < 0) {
+ debug("Error: Max frequency missing\n");
+ return -ENODEV;
+ }
+ priv->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
+
+ debug("%s: regs=<0x%x>, max-frequency=%d\n", __func__,
+ (int)priv->base, priv->max_hz);
+
+ return 0;
+}
+
+static int ti_qspi_child_pre_probe(struct udevice *dev)
+{
+ struct spi_slave *slave = dev_get_parent_priv(dev);
+ struct udevice *bus = dev_get_parent(dev);
+ struct ti_qspi_priv *priv = dev_get_priv(bus);
+
+ slave->memory_map = priv->memory_map;
+ return 0;
+}
+
+static const struct dm_spi_ops ti_qspi_ops = {
+ .claim_bus = ti_qspi_claim_bus,
+ .release_bus = ti_qspi_release_bus,
+ .xfer = ti_qspi_xfer,
+ .set_speed = ti_qspi_set_speed,
+ .set_mode = ti_qspi_set_mode,
+};
+
+static const struct udevice_id ti_qspi_ids[] = {
+ { .compatible = "ti,dra7xxx-qspi", .data = QSPI_DRA7XX_FCLK},
+ { .compatible = "ti,am4372-qspi", .data = QSPI_FCLK},
+ { }
+};
+
+U_BOOT_DRIVER(ti_qspi) = {
+ .name = "ti_qspi",
+ .id = UCLASS_SPI,
+ .of_match = ti_qspi_ids,
+ .ops = &ti_qspi_ops,
+ .ofdata_to_platdata = ti_qspi_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct ti_qspi_priv),
+ .probe = ti_qspi_probe,
+ .child_pre_probe = ti_qspi_child_pre_probe,
+};
+#endif /* CONFIG_DM_SPI */