Lines Matching +full:cs +full:- +full:to +full:- +full:clk
1 // SPDX-License-Identifier: GPL-2.0-or-later
7 * Hongjun Chen <hong-jun.chen@freescale.com>
22 #include <linux/clk.h>
37 switch (mps->type) { \
39 struct mpc52xx_psc __iomem *psc = mps->psc; \
40 __ret = &psc->regname; \
44 struct mpc5125_psc __iomem *psc = mps->psc; \
45 __ret = &psc->regname; \
70 * if t is NULL then reset the values to the default values
75 struct mpc512x_psc_spi_cs *cs = spi->controller_state; in mpc512x_psc_spi_transfer_setup() local
77 cs->speed_hz = (t && t->speed_hz) in mpc512x_psc_spi_transfer_setup()
78 ? t->speed_hz : spi->max_speed_hz; in mpc512x_psc_spi_transfer_setup()
79 cs->bits_per_word = (t && t->bits_per_word) in mpc512x_psc_spi_transfer_setup()
80 ? t->bits_per_word : spi->bits_per_word; in mpc512x_psc_spi_transfer_setup()
81 cs->bits_per_word = ((cs->bits_per_word + 7) / 8) * 8; in mpc512x_psc_spi_transfer_setup()
87 struct mpc512x_psc_spi_cs *cs = spi->controller_state; in mpc512x_psc_spi_activate_cs() local
88 struct mpc512x_psc_spi *mps = spi_master_get_devdata(spi->master); in mpc512x_psc_spi_activate_cs()
97 if (spi->mode & SPI_CPHA) in mpc512x_psc_spi_activate_cs()
102 if (spi->mode & SPI_CPOL) in mpc512x_psc_spi_activate_cs()
107 if (spi->mode & SPI_LSB_FIRST) in mpc512x_psc_spi_activate_cs()
115 speed = cs->speed_hz; in mpc512x_psc_spi_activate_cs()
118 bclkdiv = (mps->mclk_rate / speed) - 1; in mpc512x_psc_spi_activate_cs()
122 mps->bits_per_word = cs->bits_per_word; in mpc512x_psc_spi_activate_cs()
146 struct mpc512x_psc_spi *mps = spi_master_get_devdata(spi->master); in mpc512x_psc_spi_transfer_rxtx()
147 struct mpc512x_psc_fifo __iomem *fifo = mps->fifo; in mpc512x_psc_spi_transfer_rxtx()
148 size_t tx_len = t->len; in mpc512x_psc_spi_transfer_rxtx()
149 size_t rx_len = t->len; in mpc512x_psc_spi_transfer_rxtx()
150 u8 *tx_buf = (u8 *)t->tx_buf; in mpc512x_psc_spi_transfer_rxtx()
151 u8 *rx_buf = (u8 *)t->rx_buf; in mpc512x_psc_spi_transfer_rxtx()
153 if (!tx_buf && !rx_buf && t->len) in mpc512x_psc_spi_transfer_rxtx()
154 return -EINVAL; in mpc512x_psc_spi_transfer_rxtx()
167 fifosz = MPC512x_PSC_FIFO_SZ(in_be32(&fifo->txsz)); in mpc512x_psc_spi_transfer_rxtx()
169 fifosz = MPC512x_PSC_FIFO_SZ(in_be32(&fifo->rxsz)); in mpc512x_psc_spi_transfer_rxtx()
170 fifosz -= in_be32(&fifo->rxcnt) + 1; in mpc512x_psc_spi_transfer_rxtx()
175 while (txcount-- > 0) { in mpc512x_psc_spi_transfer_rxtx()
177 if (tx_len == EOFBYTE && t->cs_change) in mpc512x_psc_spi_transfer_rxtx()
178 setbits32(&fifo->txcmd, in mpc512x_psc_spi_transfer_rxtx()
180 out_8(&fifo->txdata_8, data); in mpc512x_psc_spi_transfer_rxtx()
181 tx_len--; in mpc512x_psc_spi_transfer_rxtx()
185 reinit_completion(&mps->txisrdone); in mpc512x_psc_spi_transfer_rxtx()
186 out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY); in mpc512x_psc_spi_transfer_rxtx()
187 out_be32(&fifo->tximr, MPC512x_PSC_FIFO_EMPTY); in mpc512x_psc_spi_transfer_rxtx()
188 wait_for_completion(&mps->txisrdone); in mpc512x_psc_spi_transfer_rxtx()
205 * looking, don't bother fetching what was added to in mpc512x_psc_spi_transfer_rxtx()
206 * the FIFO while we read from it -- we'll return in mpc512x_psc_spi_transfer_rxtx()
210 fifosz = in_be32(&fifo->rxcnt); in mpc512x_psc_spi_transfer_rxtx()
212 while (rxcount-- > 0) { in mpc512x_psc_spi_transfer_rxtx()
213 data = in_8(&fifo->rxdata_8); in mpc512x_psc_spi_transfer_rxtx()
216 rx_len--; in mpc512x_psc_spi_transfer_rxtx()
220 * come back later if there still is TX data to send, in mpc512x_psc_spi_transfer_rxtx()
232 * is still pending -- that's a transient situation in mpc512x_psc_spi_transfer_rxtx()
237 * just yield for a moment to not hog the CPU for in mpc512x_psc_spi_transfer_rxtx()
241 * to balance throughput against system load; the in mpc512x_psc_spi_transfer_rxtx()
257 } while (--rxtries > 0); in mpc512x_psc_spi_transfer_rxtx()
263 rxcount = in_be32(&fifo->rxcnt); in mpc512x_psc_spi_transfer_rxtx()
264 dev_warn(&spi->dev, in mpc512x_psc_spi_transfer_rxtx()
275 while (in_be32(&fifo->rxcnt)) in mpc512x_psc_spi_transfer_rxtx()
276 in_8(&fifo->rxdata_8); in mpc512x_psc_spi_transfer_rxtx()
291 spi = m->spi; in mpc512x_psc_spi_msg_xfer()
294 list_for_each_entry(t, &m->transfers, transfer_list) { in mpc512x_psc_spi_msg_xfer()
301 cs_change = t->cs_change; in mpc512x_psc_spi_msg_xfer()
306 m->actual_length += t->len; in mpc512x_psc_spi_msg_xfer()
314 m->status = status; in mpc512x_psc_spi_msg_xfer()
315 if (m->complete) in mpc512x_psc_spi_msg_xfer()
316 m->complete(m->context); in mpc512x_psc_spi_msg_xfer()
331 dev_dbg(&master->dev, "%s()\n", __func__); in mpc512x_psc_spi_prep_xfer_hw()
346 struct mpc512x_psc_fifo __iomem *fifo = mps->fifo; in mpc512x_psc_spi_unprep_xfer_hw()
348 dev_dbg(&master->dev, "%s()\n", __func__); in mpc512x_psc_spi_unprep_xfer_hw()
352 out_be32(&fifo->tximr, 0); in mpc512x_psc_spi_unprep_xfer_hw()
359 struct mpc512x_psc_spi_cs *cs = spi->controller_state; in mpc512x_psc_spi_setup() local
361 if (spi->bits_per_word % 8) in mpc512x_psc_spi_setup()
362 return -EINVAL; in mpc512x_psc_spi_setup()
364 if (!cs) { in mpc512x_psc_spi_setup()
365 cs = kzalloc(sizeof(*cs), GFP_KERNEL); in mpc512x_psc_spi_setup()
366 if (!cs) in mpc512x_psc_spi_setup()
367 return -ENOMEM; in mpc512x_psc_spi_setup()
369 spi->controller_state = cs; in mpc512x_psc_spi_setup()
372 cs->bits_per_word = spi->bits_per_word; in mpc512x_psc_spi_setup()
373 cs->speed_hz = spi->max_speed_hz; in mpc512x_psc_spi_setup()
380 kfree(spi->controller_state); in mpc512x_psc_spi_cleanup()
386 struct mpc512x_psc_fifo __iomem *fifo = mps->fifo; in mpc512x_psc_spi_port_config()
401 out_be32(&fifo->tximr, 0); in mpc512x_psc_spi_port_config()
402 out_be32(&fifo->rximr, 0); in mpc512x_psc_spi_port_config()
405 /*out_be32(&fifo->txsz, 0x0fe00004);*/ in mpc512x_psc_spi_port_config()
406 /*out_be32(&fifo->rxsz, 0x0ff00004);*/ in mpc512x_psc_spi_port_config()
408 sicr = 0x01000000 | /* SIM = 0001 -- 8 bit */ in mpc512x_psc_spi_port_config()
409 0x00800000 | /* GenClk = 1 -- internal clk */ in mpc512x_psc_spi_port_config()
411 0x00004000 | /* MSTR = 1 -- SPI master */ in mpc512x_psc_spi_port_config()
412 0x00000800; /* UseEOF = 1 -- SS low until EOF */ in mpc512x_psc_spi_port_config()
419 bclkdiv = (mps->mclk_rate / speed) - 1; in mpc512x_psc_spi_port_config()
428 out_be32(&fifo->rxalarm, 0xfff); in mpc512x_psc_spi_port_config()
429 out_be32(&fifo->txalarm, 0); in mpc512x_psc_spi_port_config()
432 out_be32(&fifo->rxcmd, in mpc512x_psc_spi_port_config()
434 out_be32(&fifo->txcmd, in mpc512x_psc_spi_port_config()
437 mps->bits_per_word = 8; in mpc512x_psc_spi_port_config()
445 struct mpc512x_psc_fifo __iomem *fifo = mps->fifo; in mpc512x_psc_spi_isr()
448 if (in_be32(&fifo->txisr) & in mpc512x_psc_spi_isr()
449 in_be32(&fifo->tximr) & MPC512x_PSC_FIFO_EMPTY) { in mpc512x_psc_spi_isr()
450 out_be32(&fifo->txisr, MPC512x_PSC_FIFO_EMPTY); in mpc512x_psc_spi_isr()
451 out_be32(&fifo->tximr, 0); in mpc512x_psc_spi_isr()
452 complete(&mps->txisrdone); in mpc512x_psc_spi_isr()
460 struct device *dev = &pdev->dev; in mpc512x_psc_spi_of_probe()
465 struct clk *clk; in mpc512x_psc_spi_of_probe() local
469 return -ENOMEM; in mpc512x_psc_spi_of_probe()
473 mps->type = (int)device_get_match_data(dev); in mpc512x_psc_spi_of_probe()
475 master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LSB_FIRST; in mpc512x_psc_spi_of_probe()
476 master->setup = mpc512x_psc_spi_setup; in mpc512x_psc_spi_of_probe()
477 master->prepare_transfer_hardware = mpc512x_psc_spi_prep_xfer_hw; in mpc512x_psc_spi_of_probe()
478 master->transfer_one_message = mpc512x_psc_spi_msg_xfer; in mpc512x_psc_spi_of_probe()
479 master->unprepare_transfer_hardware = mpc512x_psc_spi_unprep_xfer_hw; in mpc512x_psc_spi_of_probe()
480 master->use_gpio_descriptors = true; in mpc512x_psc_spi_of_probe()
481 master->cleanup = mpc512x_psc_spi_cleanup; in mpc512x_psc_spi_of_probe()
483 device_set_node(&master->dev, dev_fwnode(dev)); in mpc512x_psc_spi_of_probe()
488 mps->psc = tempp; in mpc512x_psc_spi_of_probe()
489 mps->fifo = in mpc512x_psc_spi_of_probe()
492 mps->irq = platform_get_irq(pdev, 0); in mpc512x_psc_spi_of_probe()
493 if (mps->irq < 0) in mpc512x_psc_spi_of_probe()
494 return mps->irq; in mpc512x_psc_spi_of_probe()
496 ret = devm_request_irq(dev, mps->irq, mpc512x_psc_spi_isr, IRQF_SHARED, in mpc512x_psc_spi_of_probe()
497 "mpc512x-psc-spi", mps); in mpc512x_psc_spi_of_probe()
500 init_completion(&mps->txisrdone); in mpc512x_psc_spi_of_probe()
502 clk = devm_clk_get_enabled(dev, "mclk"); in mpc512x_psc_spi_of_probe()
503 if (IS_ERR(clk)) in mpc512x_psc_spi_of_probe()
504 return PTR_ERR(clk); in mpc512x_psc_spi_of_probe()
506 mps->mclk_rate = clk_get_rate(clk); in mpc512x_psc_spi_of_probe()
508 clk = devm_clk_get_enabled(dev, "ipg"); in mpc512x_psc_spi_of_probe()
509 if (IS_ERR(clk)) in mpc512x_psc_spi_of_probe()
510 return PTR_ERR(clk); in mpc512x_psc_spi_of_probe()
520 { .compatible = "fsl,mpc5121-psc-spi", .data = (void *)TYPE_MPC5121 },
521 { .compatible = "fsl,mpc5125-psc-spi", .data = (void *)TYPE_MPC5125 },
530 .name = "mpc512x-psc-spi",