4 * Copyright (C) 2013, Texas Instruments, Incorporated
6 * SPDX-License-Identifier: GPL-2.0+
11 #include <asm/arch/omap.h>
16 #include <asm/omap_gpio.h>
17 #include <asm/omap_common.h>
18 #include <asm/ti-common/ti-edma3.h>
20 DECLARE_GLOBAL_DATA_PTR;
22 /* ti qpsi register bit masks */
23 #define QSPI_TIMEOUT 2000000
24 #define QSPI_FCLK 192000000
26 #define QSPI_CLK_EN BIT(31)
27 #define QSPI_CLK_DIV_MAX 0xffff
29 #define QSPI_EN_CS(n) (n << 28)
30 #define QSPI_WLEN(n) ((n-1) << 19)
31 #define QSPI_3_PIN BIT(18)
32 #define QSPI_RD_SNGL BIT(16)
33 #define QSPI_WR_SNGL (2 << 16)
34 #define QSPI_INVAL (4 << 16)
35 #define QSPI_RD_QUAD (7 << 16)
37 #define QSPI_DD(m, n) (m << (3 + n*8))
38 #define QSPI_CKPHA(n) (1 << (2 + n*8))
39 #define QSPI_CSPOL(n) (1 << (1 + n*8))
40 #define QSPI_CKPOL(n) (1 << (n*8))
42 #define QSPI_WC BIT(1)
43 #define QSPI_BUSY BIT(0)
44 #define QSPI_WC_BUSY (QSPI_WC | QSPI_BUSY)
45 #define QSPI_XFER_DONE QSPI_WC
46 #define MM_SWITCH 0x01
47 #define MEM_CS(cs) ((cs + 1) << 8)
48 #define MEM_CS_UNSELECT 0xfffff8ff
49 #define MMAP_START_ADDR_DRA 0x5c000000
50 #define MMAP_START_ADDR_AM43x 0x30000000
51 #define CORE_CTRL_IO 0x4a002558
53 #define QSPI_CMD_READ (0x3 << 0)
54 #define QSPI_CMD_READ_DUAL (0x6b << 0)
55 #define QSPI_CMD_READ_QUAD (0x6c << 0)
56 #define QSPI_CMD_READ_FAST (0x0b << 0)
57 #define QSPI_SETUP0_NUM_A_BYTES (0x3 << 8)
58 #define QSPI_SETUP0_NUM_D_BYTES_NO_BITS (0x0 << 10)
59 #define QSPI_SETUP0_NUM_D_BYTES_8_BITS (0x1 << 10)
60 #define QSPI_SETUP0_READ_NORMAL (0x0 << 12)
61 #define QSPI_SETUP0_READ_DUAL (0x1 << 12)
62 #define QSPI_SETUP0_READ_QUAD (0x3 << 12)
63 #define QSPI_CMD_WRITE (0x12 << 16)
64 #define QSPI_NUM_DUMMY_BITS (0x0 << 24)
66 /* ti qspi register set */
96 struct spi_slave slave;
102 struct ti_qspi_regs *base;
109 static void ti_spi_set_speed(struct ti_qspi_priv *priv, uint hz)
116 clk_div = (QSPI_FCLK / hz) - 1;
118 debug("ti_spi_set_speed: hz: %d, clock divider %d\n", hz, clk_div);
121 writel(readl(&priv->base->clk_ctrl) & ~QSPI_CLK_EN,
122 &priv->base->clk_ctrl);
124 /* assign clk_div values */
127 else if (clk_div > QSPI_CLK_DIV_MAX)
128 clk_div = QSPI_CLK_DIV_MAX;
131 writel(QSPI_CLK_EN | clk_div, &priv->base->clk_ctrl);
134 static void ti_qspi_cs_deactivate(struct ti_qspi_priv *priv)
136 writel(priv->cmd | QSPI_INVAL, &priv->base->cmd);
137 /* dummy readl to ensure bus sync */
138 readl(&priv->base->cmd);
141 static int __ti_qspi_set_mode(struct ti_qspi_priv *priv, unsigned int mode)
145 priv->dc |= QSPI_CKPHA(0);
147 priv->dc |= QSPI_CKPOL(0);
148 if (mode & SPI_CS_HIGH)
149 priv->dc |= QSPI_CSPOL(0);
154 static int __ti_qspi_claim_bus(struct ti_qspi_priv *priv, int cs)
156 writel(priv->dc, &priv->base->dc);
157 writel(0, &priv->base->cmd);
158 writel(0, &priv->base->data);
161 writel(priv->dc, &priv->base->dc);
166 static void __ti_qspi_release_bus(struct ti_qspi_priv *priv)
168 writel(0, &priv->base->dc);
169 writel(0, &priv->base->cmd);
170 writel(0, &priv->base->data);
173 static void ti_qspi_ctrl_mode_mmap(void *ctrl_mod_mmap, int cs, bool enable)
177 val = readl(ctrl_mod_mmap);
181 val &= MEM_CS_UNSELECT;
182 writel(val, ctrl_mod_mmap);
185 static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen,
186 const void *dout, void *din, unsigned long flags,
189 uint words = bitlen >> 3; /* fixed 8-bit word length */
190 const uchar *txp = dout;
195 /* Setup mmap flags */
196 if (flags & SPI_XFER_MMAP) {
197 writel(MM_SWITCH, &priv->base->memswitch);
198 if (priv->ctrl_mod_mmap)
199 ti_qspi_ctrl_mode_mmap(priv->ctrl_mod_mmap, cs, true);
201 } else if (flags & SPI_XFER_MMAP_END) {
202 writel(~MM_SWITCH, &priv->base->memswitch);
203 if (priv->ctrl_mod_mmap)
204 ti_qspi_ctrl_mode_mmap(priv->ctrl_mod_mmap, cs, false);
212 debug("spi_xfer: Non byte aligned SPI transfer\n");
216 /* Setup command reg */
218 priv->cmd |= QSPI_WLEN(8);
219 priv->cmd |= QSPI_EN_CS(cs);
220 if (priv->mode & SPI_3WIRE)
221 priv->cmd |= QSPI_3_PIN;
224 /* FIXME: This delay is required for successfull
225 * completion of read/write/erase. Once its root
226 * caused, it will be remove from the driver.
233 debug("tx cmd %08x dc %08x data %02x\n",
234 priv->cmd | QSPI_WR_SNGL, priv->dc, *txp);
235 writel(*txp++, &priv->base->data);
236 writel(priv->cmd | QSPI_WR_SNGL,
238 status = readl(&priv->base->status);
239 timeout = QSPI_TIMEOUT;
240 while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
242 printf("spi_xfer: TX timeout!\n");
245 status = readl(&priv->base->status);
247 debug("tx done, status %08x\n", status);
250 debug("rx cmd %08x dc %08x\n",
251 ((u32)(priv->cmd | QSPI_RD_SNGL)), priv->dc);
255 writel(priv->cmd | QSPI_RD_SNGL, &priv->base->cmd);
256 status = readl(&priv->base->status);
257 timeout = QSPI_TIMEOUT;
258 while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
260 printf("spi_xfer: RX timeout!\n");
263 status = readl(&priv->base->status);
265 *rxp++ = readl(&priv->base->data);
266 debug("rx done, status %08x, read %02x\n",
271 /* Terminate frame */
272 if (flags & SPI_XFER_END)
273 ti_qspi_cs_deactivate(priv);
278 /* TODO: control from sf layer to here through dm-spi */
279 #if defined(CONFIG_TI_EDMA3) && !defined(CONFIG_DMA)
280 void spi_flash_copy_mmap(void *data, void *offset, size_t len)
282 unsigned int addr = (unsigned int) (data);
283 unsigned int edma_slot_num = 1;
285 /* Invalidate the area, so no writeback into the RAM races with DMA */
286 invalidate_dcache_range(addr, addr + roundup(len, ARCH_DMA_MINALIGN));
288 /* enable edma3 clocks */
289 enable_edma3_clocks();
291 /* Call edma3 api to do actual DMA transfer */
292 edma3_transfer(EDMA3_BASE, edma_slot_num, data, offset, len);
294 /* disable edma3 clocks */
295 disable_edma3_clocks();
297 *((unsigned int *)offset) += len;
301 #ifndef CONFIG_DM_SPI
303 static inline struct ti_qspi_priv *to_ti_qspi_priv(struct spi_slave *slave)
305 return container_of(slave, struct ti_qspi_priv, slave);
308 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
313 void spi_cs_activate(struct spi_slave *slave)
315 /* CS handled in xfer */
319 void spi_cs_deactivate(struct spi_slave *slave)
321 struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
322 ti_qspi_cs_deactivate(priv);
330 static void ti_spi_setup_spi_register(struct ti_qspi_priv *priv)
334 #ifdef CONFIG_QSPI_QUAD_SUPPORT
335 struct spi_slave *slave = &priv->slave;
336 memval |= (QSPI_CMD_READ_QUAD | QSPI_SETUP0_NUM_A_BYTES |
337 QSPI_SETUP0_NUM_D_BYTES_8_BITS |
338 QSPI_SETUP0_READ_QUAD | QSPI_CMD_WRITE |
339 QSPI_NUM_DUMMY_BITS);
340 slave->mode_rx = SPI_RX_QUAD;
342 memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES |
343 QSPI_SETUP0_NUM_D_BYTES_NO_BITS |
344 QSPI_SETUP0_READ_NORMAL | QSPI_CMD_WRITE |
348 writel(memval, &priv->base->setup0);
351 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
352 unsigned int max_hz, unsigned int mode)
354 struct ti_qspi_priv *priv;
357 gpio_request(CONFIG_QSPI_SEL_GPIO, "qspi_gpio");
358 gpio_direction_output(CONFIG_QSPI_SEL_GPIO, 1);
361 priv = spi_alloc_slave(struct ti_qspi_priv, bus, cs);
363 printf("SPI_error: Fail to allocate ti_qspi_priv\n");
367 priv->base = (struct ti_qspi_regs *)QSPI_BASE;
369 #if defined(CONFIG_DRA7XX) || defined(CONFIG_AM57XX)
370 priv->ctrl_mod_mmap = (void *)CORE_CTRL_IO;
371 priv->slave.memory_map = (void *)MMAP_START_ADDR_DRA;
373 priv->slave.memory_map = (void *)MMAP_START_ADDR_AM43x;
376 ti_spi_set_speed(priv, max_hz);
378 #ifdef CONFIG_TI_SPI_MMAP
379 ti_spi_setup_spi_register(priv);
385 void spi_free_slave(struct spi_slave *slave)
387 struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
391 int spi_claim_bus(struct spi_slave *slave)
393 struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
395 debug("%s: bus:%i cs:%i\n", __func__, priv->slave.bus, priv->slave.cs);
396 __ti_qspi_set_mode(priv, priv->mode);
397 return __ti_qspi_claim_bus(priv, priv->slave.cs);
399 void spi_release_bus(struct spi_slave *slave)
401 struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
403 debug("%s: bus:%i cs:%i\n", __func__, priv->slave.bus, priv->slave.cs);
404 __ti_qspi_release_bus(priv);
407 int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
408 void *din, unsigned long flags)
410 struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
412 debug("spi_xfer: bus:%i cs:%i bitlen:%i flags:%lx\n",
413 priv->slave.bus, priv->slave.cs, bitlen, flags);
414 return __ti_qspi_xfer(priv, bitlen, dout, din, flags, priv->slave.cs);
417 #else /* CONFIG_DM_SPI */
419 static void __ti_qspi_setup_memorymap(struct ti_qspi_priv *priv,
420 struct spi_slave *slave,
424 u32 mode = slave->mode_rx & (SPI_RX_QUAD | SPI_RX_DUAL);
427 writel(0, &priv->base->setup0);
431 memval = QSPI_SETUP0_NUM_A_BYTES | QSPI_CMD_WRITE | QSPI_NUM_DUMMY_BITS;
435 memval |= QSPI_CMD_READ_QUAD;
436 memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
437 memval |= QSPI_SETUP0_READ_QUAD;
438 slave->mode_rx = SPI_RX_QUAD;
441 memval |= QSPI_CMD_READ_DUAL;
442 memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
443 memval |= QSPI_SETUP0_READ_DUAL;
446 memval |= QSPI_CMD_READ;
447 memval |= QSPI_SETUP0_NUM_D_BYTES_NO_BITS;
448 memval |= QSPI_SETUP0_READ_NORMAL;
452 writel(memval, &priv->base->setup0);
456 static int ti_qspi_set_speed(struct udevice *bus, uint max_hz)
458 struct ti_qspi_priv *priv = dev_get_priv(bus);
460 ti_spi_set_speed(priv, max_hz);
465 static int ti_qspi_set_mode(struct udevice *bus, uint mode)
467 struct ti_qspi_priv *priv = dev_get_priv(bus);
468 return __ti_qspi_set_mode(priv, mode);
471 static int ti_qspi_claim_bus(struct udevice *dev)
473 struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
474 struct spi_slave *slave = dev_get_parent_priv(dev);
475 struct ti_qspi_priv *priv;
479 priv = dev_get_priv(bus);
481 if (slave_plat->cs > priv->num_cs) {
482 debug("invalid qspi chip select\n");
486 __ti_qspi_setup_memorymap(priv, slave, true);
488 return __ti_qspi_claim_bus(priv, slave_plat->cs);
491 static int ti_qspi_release_bus(struct udevice *dev)
493 struct spi_slave *slave = dev_get_parent_priv(dev);
494 struct ti_qspi_priv *priv;
498 priv = dev_get_priv(bus);
500 __ti_qspi_setup_memorymap(priv, slave, false);
501 __ti_qspi_release_bus(priv);
506 static int ti_qspi_xfer(struct udevice *dev, unsigned int bitlen,
507 const void *dout, void *din, unsigned long flags)
509 struct dm_spi_slave_platdata *slave = dev_get_parent_platdata(dev);
510 struct ti_qspi_priv *priv;
514 priv = dev_get_priv(bus);
516 if (slave->cs > priv->num_cs) {
517 debug("invalid qspi chip select\n");
521 return __ti_qspi_xfer(priv, bitlen, dout, din, flags, slave->cs);
524 static int ti_qspi_probe(struct udevice *bus)
526 /* Nothing to do in probe */
530 static int ti_qspi_ofdata_to_platdata(struct udevice *bus)
532 struct ti_qspi_priv *priv = dev_get_priv(bus);
533 const void *blob = gd->fdt_blob;
534 int node = bus->of_offset;
538 priv->base = map_physmem(dev_get_addr(bus), sizeof(struct ti_qspi_regs),
540 priv->memory_map = map_physmem(dev_get_addr_index(bus, 1), 0,
542 addr = dev_get_addr_index(bus, 2);
543 mmap = map_physmem(dev_get_addr_index(bus, 2), 0, MAP_NOCACHE);
544 priv->ctrl_mod_mmap = (addr == FDT_ADDR_T_NONE) ? NULL : mmap;
546 priv->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", -1);
547 if (priv->max_hz < 0) {
548 debug("Error: Max frequency missing\n");
551 priv->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
553 debug("%s: regs=<0x%x>, max-frequency=%d\n", __func__,
554 (int)priv->base, priv->max_hz);
559 static int ti_qspi_child_pre_probe(struct udevice *dev)
561 struct spi_slave *slave = dev_get_parent_priv(dev);
562 struct udevice *bus = dev_get_parent(dev);
563 struct ti_qspi_priv *priv = dev_get_priv(bus);
565 slave->memory_map = priv->memory_map;
569 static const struct dm_spi_ops ti_qspi_ops = {
570 .claim_bus = ti_qspi_claim_bus,
571 .release_bus = ti_qspi_release_bus,
572 .xfer = ti_qspi_xfer,
573 .set_speed = ti_qspi_set_speed,
574 .set_mode = ti_qspi_set_mode,
577 static const struct udevice_id ti_qspi_ids[] = {
578 { .compatible = "ti,dra7xxx-qspi" },
579 { .compatible = "ti,am4372-qspi" },
583 U_BOOT_DRIVER(ti_qspi) = {
586 .of_match = ti_qspi_ids,
588 .ofdata_to_platdata = ti_qspi_ofdata_to_platdata,
589 .priv_auto_alloc_size = sizeof(struct ti_qspi_priv),
590 .probe = ti_qspi_probe,
591 .child_pre_probe = ti_qspi_child_pre_probe,
593 #endif /* CONFIG_DM_SPI */