Lines Matching +full:num +full:- +full:ss +full:- +full:bits
9 * 2002-2007 (c) MontaVista Software, Inc.
55 #define XSPI_SSR_OFFSET 0x70 /* 32-bit Slave Select Register */
119 xspi->write_fn(*xspi->tx_ptr, xspi->regs + XSPI_TXD_OFFSET); in xspi_tx8()
120 xspi->tx_ptr++; in xspi_tx8()
125 xspi->write_fn(*(u16 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET); in xspi_tx16()
126 xspi->tx_ptr += 2; in xspi_tx16()
131 xspi->write_fn(*(u32 *)(xspi->tx_ptr), xspi->regs + XSPI_TXD_OFFSET); in xspi_tx32()
132 xspi->tx_ptr += 4; in xspi_tx32()
137 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); in xspi_rx8()
138 if (xspi->rx_ptr) { in xspi_rx8()
139 *xspi->rx_ptr = data & 0xff; in xspi_rx8()
140 xspi->rx_ptr++; in xspi_rx8()
146 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); in xspi_rx16()
147 if (xspi->rx_ptr) { in xspi_rx16()
148 *(u16 *)(xspi->rx_ptr) = data & 0xffff; in xspi_rx16()
149 xspi->rx_ptr += 2; in xspi_rx16()
155 u32 data = xspi->read_fn(xspi->regs + XSPI_RXD_OFFSET); in xspi_rx32()
156 if (xspi->rx_ptr) { in xspi_rx32()
157 *(u32 *)(xspi->rx_ptr) = data; in xspi_rx32()
158 xspi->rx_ptr += 4; in xspi_rx32()
164 void __iomem *regs_base = xspi->regs; in xspi_init_hw()
167 xspi->write_fn(XIPIF_V123B_RESET_MASK, in xspi_init_hw()
170 xspi->write_fn(0, regs_base + XIPIF_V123B_IIER_OFFSET); in xspi_init_hw()
172 xspi->write_fn(XIPIF_V123B_GINTR_ENABLE, in xspi_init_hw()
175 xspi->write_fn(0xffff, regs_base + XSPI_SSR_OFFSET); in xspi_init_hw()
178 xspi->write_fn(XSPI_CR_TRANS_INHIBIT | XSPI_CR_MANUAL_SSELECT | in xspi_init_hw()
185 struct xilinx_spi *xspi = spi_master_get_devdata(spi->master); in xilinx_spi_chipselect()
189 xspi->write_fn(0xffff, xspi->regs + XSPI_SSR_OFFSET); in xilinx_spi_chipselect()
192 u16 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET) in xilinx_spi_chipselect()
194 if (spi->mode & SPI_CPHA) in xilinx_spi_chipselect()
196 if (spi->mode & SPI_CPOL) in xilinx_spi_chipselect()
198 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET); in xilinx_spi_chipselect()
200 /* We do not check spi->max_speed_hz here as the SPI clock in xilinx_spi_chipselect()
206 xspi->write_fn(~(0x0001 << spi->chip_select), in xilinx_spi_chipselect()
207 xspi->regs + XSPI_SSR_OFFSET); in xilinx_spi_chipselect()
213 * supports 8 or 16 bits per word which cannot be changed in software.
215 * Check for correct bits per word. Chip select delay calculations could be
221 struct xilinx_spi *xspi = spi_master_get_devdata(spi->master); in xilinx_spi_setup_transfer()
224 bits_per_word = (t && t->bits_per_word) in xilinx_spi_setup_transfer()
225 ? t->bits_per_word : spi->bits_per_word; in xilinx_spi_setup_transfer()
226 if (bits_per_word != xspi->bits_per_word) { in xilinx_spi_setup_transfer()
227 dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n", in xilinx_spi_setup_transfer()
229 return -EINVAL; in xilinx_spi_setup_transfer()
237 /* always return 0, we can not check the number of bits. in xilinx_spi_setup()
239 * there, in that case the SPI core defaults to 8 bits, which we in xilinx_spi_setup()
243 * correct number of bits per transfer. in xilinx_spi_setup()
255 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET); in xilinx_spi_fill_tx_fifo()
256 while ((sr & XSPI_SR_TX_FULL_MASK) == 0 && xspi->remaining_bytes > 0) { in xilinx_spi_fill_tx_fifo()
257 if (xspi->tx_ptr) in xilinx_spi_fill_tx_fifo()
258 xspi->tx_fn(xspi); in xilinx_spi_fill_tx_fifo()
260 xspi->write_fn(0, xspi->regs + XSPI_TXD_OFFSET); in xilinx_spi_fill_tx_fifo()
261 xspi->remaining_bytes -= xspi->bits_per_word / 8; in xilinx_spi_fill_tx_fifo()
262 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET); in xilinx_spi_fill_tx_fifo()
268 struct xilinx_spi *xspi = spi_master_get_devdata(spi->master); in xilinx_spi_txrx_bufs()
274 xspi->tx_ptr = t->tx_buf; in xilinx_spi_txrx_bufs()
275 xspi->rx_ptr = t->rx_buf; in xilinx_spi_txrx_bufs()
276 xspi->remaining_bytes = t->len; in xilinx_spi_txrx_bufs()
277 INIT_COMPLETION(xspi->done); in xilinx_spi_txrx_bufs()
284 ipif_ier = xspi->read_fn(xspi->regs + XIPIF_V123B_IIER_OFFSET); in xilinx_spi_txrx_bufs()
285 xspi->write_fn(ipif_ier | XSPI_INTR_TX_EMPTY, in xilinx_spi_txrx_bufs()
286 xspi->regs + XIPIF_V123B_IIER_OFFSET); in xilinx_spi_txrx_bufs()
289 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET) & in xilinx_spi_txrx_bufs()
291 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET); in xilinx_spi_txrx_bufs()
293 wait_for_completion(&xspi->done); in xilinx_spi_txrx_bufs()
296 xspi->write_fn(ipif_ier, xspi->regs + XIPIF_V123B_IIER_OFFSET); in xilinx_spi_txrx_bufs()
298 return t->len - xspi->remaining_bytes; in xilinx_spi_txrx_bufs()
313 ipif_isr = xspi->read_fn(xspi->regs + XIPIF_V123B_IISR_OFFSET); in xilinx_spi_irq()
314 xspi->write_fn(ipif_isr, xspi->regs + XIPIF_V123B_IISR_OFFSET); in xilinx_spi_irq()
325 cr = xspi->read_fn(xspi->regs + XSPI_CR_OFFSET); in xilinx_spi_irq()
326 xspi->write_fn(cr | XSPI_CR_TRANS_INHIBIT, in xilinx_spi_irq()
327 xspi->regs + XSPI_CR_OFFSET); in xilinx_spi_irq()
330 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET); in xilinx_spi_irq()
332 xspi->rx_fn(xspi); in xilinx_spi_irq()
333 sr = xspi->read_fn(xspi->regs + XSPI_SR_OFFSET); in xilinx_spi_irq()
337 if (xspi->remaining_bytes > 0) { in xilinx_spi_irq()
342 xspi->write_fn(cr, xspi->regs + XSPI_CR_OFFSET); in xilinx_spi_irq()
347 complete(&xspi->done); in xilinx_spi_irq()
355 { .compatible = "xlnx,xps-spi-2.00.a", },
356 { .compatible = "xlnx,xps-spi-2.00.b", },
372 /* the spi->mode bits understood by this driver: */ in xilinx_spi_init()
373 master->mode_bits = SPI_CPOL | SPI_CPHA; in xilinx_spi_init()
376 xspi->bitbang.master = spi_master_get(master); in xilinx_spi_init()
377 xspi->bitbang.chipselect = xilinx_spi_chipselect; in xilinx_spi_init()
378 xspi->bitbang.setup_transfer = xilinx_spi_setup_transfer; in xilinx_spi_init()
379 xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs; in xilinx_spi_init()
380 xspi->bitbang.master->setup = xilinx_spi_setup; in xilinx_spi_init()
381 init_completion(&xspi->done); in xilinx_spi_init()
383 if (!request_mem_region(mem->start, resource_size(mem), in xilinx_spi_init()
387 xspi->regs = ioremap(mem->start, resource_size(mem)); in xilinx_spi_init()
388 if (xspi->regs == NULL) { in xilinx_spi_init()
393 master->bus_num = bus_num; in xilinx_spi_init()
394 master->num_chipselect = num_cs; in xilinx_spi_init()
395 master->dev.of_node = dev->of_node; in xilinx_spi_init()
397 xspi->mem = *mem; in xilinx_spi_init()
398 xspi->irq = irq; in xilinx_spi_init()
400 xspi->read_fn = xspi_read32; in xilinx_spi_init()
401 xspi->write_fn = xspi_write32; in xilinx_spi_init()
403 xspi->read_fn = xspi_read32_be; in xilinx_spi_init()
404 xspi->write_fn = xspi_write32_be; in xilinx_spi_init()
406 xspi->bits_per_word = bits_per_word; in xilinx_spi_init()
407 if (xspi->bits_per_word == 8) { in xilinx_spi_init()
408 xspi->tx_fn = xspi_tx8; in xilinx_spi_init()
409 xspi->rx_fn = xspi_rx8; in xilinx_spi_init()
410 } else if (xspi->bits_per_word == 16) { in xilinx_spi_init()
411 xspi->tx_fn = xspi_tx16; in xilinx_spi_init()
412 xspi->rx_fn = xspi_rx16; in xilinx_spi_init()
413 } else if (xspi->bits_per_word == 32) { in xilinx_spi_init()
414 xspi->tx_fn = xspi_tx32; in xilinx_spi_init()
415 xspi->rx_fn = xspi_rx32; in xilinx_spi_init()
424 ret = request_irq(xspi->irq, xilinx_spi_irq, 0, XILINX_SPI_NAME, xspi); in xilinx_spi_init()
428 ret = spi_bitbang_start(&xspi->bitbang); in xilinx_spi_init()
435 (unsigned long long)mem->start, xspi->regs, xspi->irq); in xilinx_spi_init()
439 free_irq(xspi->irq, xspi); in xilinx_spi_init()
441 iounmap(xspi->regs); in xilinx_spi_init()
443 release_mem_region(mem->start, resource_size(mem)); in xilinx_spi_init()
456 spi_bitbang_stop(&xspi->bitbang); in xilinx_spi_deinit()
457 free_irq(xspi->irq, xspi); in xilinx_spi_deinit()
458 iounmap(xspi->regs); in xilinx_spi_deinit()
460 release_mem_region(xspi->mem.start, resource_size(&xspi->mem)); in xilinx_spi_deinit()
461 spi_master_put(xspi->bitbang.master); in xilinx_spi_deinit()
473 pdata = dev->dev.platform_data; in xilinx_spi_probe()
475 num_cs = pdata->num_chipselect; in xilinx_spi_probe()
476 little_endian = pdata->little_endian; in xilinx_spi_probe()
477 bits_per_word = pdata->bits_per_word; in xilinx_spi_probe()
481 if (dev->dev.of_node) { in xilinx_spi_probe()
485 /* number of slave select bits is required */ in xilinx_spi_probe()
486 prop = of_get_property(dev->dev.of_node, "xlnx,num-ss-bits", in xilinx_spi_probe()
494 dev_err(&dev->dev, "Missing slave select configuration data\n"); in xilinx_spi_probe()
495 return -EINVAL; in xilinx_spi_probe()
501 return -ENODEV; in xilinx_spi_probe()
505 return -ENXIO; in xilinx_spi_probe()
507 master = xilinx_spi_init(&dev->dev, r, irq, dev->id, num_cs, in xilinx_spi_probe()
510 return -ENODEV; in xilinx_spi_probe()
513 for (i = 0; i < pdata->num_devices; i++) in xilinx_spi_probe()
514 spi_new_device(master, pdata->devices + i); in xilinx_spi_probe()