Lines Matching refs:mspi
52 void fsl_spi_cpm_reinit_txrx(struct mpc8xxx_spi *mspi)
54 if (mspi->flags & SPI_QE) {
55 qe_issue_cmd(QE_INIT_TX_RX, mspi->subblock,
58 if (mspi->flags & SPI_CPM1) {
59 out_be32(&mspi->pram->rstate, 0);
60 out_be16(&mspi->pram->rbptr,
61 in_be16(&mspi->pram->rbase));
62 out_be32(&mspi->pram->tstate, 0);
63 out_be16(&mspi->pram->tbptr,
64 in_be16(&mspi->pram->tbase));
72 static void fsl_spi_cpm_bufs_start(struct mpc8xxx_spi *mspi)
74 struct cpm_buf_desc __iomem *tx_bd = mspi->tx_bd;
75 struct cpm_buf_desc __iomem *rx_bd = mspi->rx_bd;
76 unsigned int xfer_len = min(mspi->count, SPI_MRBLR);
78 struct fsl_spi_reg *reg_base = mspi->reg_base;
80 xfer_ofs = mspi->xfer_in_progress->len - mspi->count;
82 if (mspi->rx_dma == mspi->dma_dummy_rx)
83 out_be32(&rx_bd->cbd_bufaddr, mspi->rx_dma);
85 out_be32(&rx_bd->cbd_bufaddr, mspi->rx_dma + xfer_ofs);
89 if (mspi->tx_dma == mspi->dma_dummy_tx)
90 out_be32(&tx_bd->cbd_bufaddr, mspi->tx_dma);
92 out_be32(&tx_bd->cbd_bufaddr, mspi->tx_dma + xfer_ofs);
101 int fsl_spi_cpm_bufs(struct mpc8xxx_spi *mspi,
104 struct device *dev = mspi->dev;
105 struct fsl_spi_reg *reg_base = mspi->reg_base;
108 mspi->map_tx_dma = 0;
109 mspi->map_rx_dma = 0;
111 mspi->map_tx_dma = 1;
112 mspi->map_rx_dma = 1;
116 mspi->tx_dma = mspi->dma_dummy_tx;
117 mspi->map_tx_dma = 0;
121 mspi->rx_dma = mspi->dma_dummy_rx;
122 mspi->map_rx_dma = 0;
136 mspi->tx = dst;
137 mspi->map_tx_dma = 1;
140 if (mspi->map_tx_dma) {
141 void *nonconst_tx = (void *)mspi->tx; /* shut up gcc */
143 mspi->tx_dma = dma_map_single(dev, nonconst_tx, t->len,
145 if (dma_mapping_error(dev, mspi->tx_dma)) {
150 mspi->tx_dma = t->tx_dma;
153 if (mspi->map_rx_dma) {
154 mspi->rx_dma = dma_map_single(dev, mspi->rx, t->len,
156 if (dma_mapping_error(dev, mspi->rx_dma)) {
161 mspi->rx_dma = t->rx_dma;
167 mspi->xfer_in_progress = t;
168 mspi->count = t->len;
171 fsl_spi_cpm_bufs_start(mspi);
176 if (mspi->map_tx_dma)
177 dma_unmap_single(dev, mspi->tx_dma, t->len, DMA_TO_DEVICE);
182 void fsl_spi_cpm_bufs_complete(struct mpc8xxx_spi *mspi)
184 struct device *dev = mspi->dev;
185 struct spi_transfer *t = mspi->xfer_in_progress;
187 if (mspi->map_tx_dma)
188 dma_unmap_single(dev, mspi->tx_dma, t->len, DMA_TO_DEVICE);
189 if (mspi->map_rx_dma)
190 dma_unmap_single(dev, mspi->rx_dma, t->len, DMA_FROM_DEVICE);
191 mspi->xfer_in_progress = NULL;
202 void fsl_spi_cpm_irq(struct mpc8xxx_spi *mspi, u32 events)
205 struct fsl_spi_reg *reg_base = mspi->reg_base;
207 dev_dbg(mspi->dev, "%s: bd datlen %d, count %d\n", __func__,
208 in_be16(&mspi->rx_bd->cbd_datlen), mspi->count);
210 len = in_be16(&mspi->rx_bd->cbd_datlen);
211 if (len > mspi->count) {
213 len = mspi->count;
219 mspi->count -= len;
220 if (mspi->count)
221 fsl_spi_cpm_bufs_start(mspi);
223 complete(&mspi->done);
261 static unsigned long fsl_spi_cpm_get_pram(struct mpc8xxx_spi *mspi)
263 struct device *dev = mspi->dev;
274 if (mspi->flags & SPI_QE && iprop && size == sizeof(*iprop) * 4)
278 if (mspi->flags & SPI_QE) {
280 qe_issue_cmd(QE_ASSIGN_PAGE_TO_DEVICE, mspi->subblock,
289 if (mspi->flags & SPI_CPM2) {
298 int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi)
300 struct device *dev = mspi->dev;
306 if (!(mspi->flags & SPI_CPM_MODE))
312 if (mspi->flags & SPI_QE) {
315 mspi->subblock = *iprop;
317 switch (mspi->subblock) {
322 mspi->subblock = QE_CR_SUBBLOCK_SPI1;
325 mspi->subblock = QE_CR_SUBBLOCK_SPI2;
330 if (mspi->flags & SPI_CPM1) {
336 mspi->pram = NULL;
338 mspi->pram = pram;
340 unsigned long pram_ofs = fsl_spi_cpm_get_pram(mspi);
343 mspi->pram = NULL;
345 mspi->pram = cpm_muram_addr(pram_ofs);
347 if (mspi->pram == NULL) {
352 bds_ofs = cpm_muram_alloc(sizeof(*mspi->tx_bd) +
353 sizeof(*mspi->rx_bd), 8);
359 mspi->dma_dummy_tx = dma_map_single(dev, empty_zero_page, PAGE_SIZE,
361 if (dma_mapping_error(dev, mspi->dma_dummy_tx)) {
366 mspi->dma_dummy_rx = dma_map_single(dev, fsl_dummy_rx, SPI_MRBLR,
368 if (dma_mapping_error(dev, mspi->dma_dummy_rx)) {
373 mspi->tx_bd = cpm_muram_addr(bds_ofs);
374 mspi->rx_bd = cpm_muram_addr(bds_ofs + sizeof(*mspi->tx_bd));
377 out_be16(&mspi->pram->tbase, cpm_muram_offset(mspi->tx_bd));
378 out_be16(&mspi->pram->rbase, cpm_muram_offset(mspi->rx_bd));
379 out_8(&mspi->pram->tfcr, CPMFCR_EB | CPMFCR_GBL);
380 out_8(&mspi->pram->rfcr, CPMFCR_EB | CPMFCR_GBL);
381 out_be16(&mspi->pram->mrblr, SPI_MRBLR);
382 out_be32(&mspi->pram->rstate, 0);
383 out_be32(&mspi->pram->rdp, 0);
384 out_be16(&mspi->pram->rbptr, 0);
385 out_be16(&mspi->pram->rbc, 0);
386 out_be32(&mspi->pram->rxtmp, 0);
387 out_be32(&mspi->pram->tstate, 0);
388 out_be32(&mspi->pram->tdp, 0);
389 out_be16(&mspi->pram->tbptr, 0);
390 out_be16(&mspi->pram->tbc, 0);
391 out_be32(&mspi->pram->txtmp, 0);
396 dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
400 if (!(mspi->flags & SPI_CPM1))
401 cpm_muram_free(cpm_muram_offset(mspi->pram));
408 void fsl_spi_cpm_free(struct mpc8xxx_spi *mspi)
410 struct device *dev = mspi->dev;
412 if (!(mspi->flags & SPI_CPM_MODE))
415 dma_unmap_single(dev, mspi->dma_dummy_rx, SPI_MRBLR, DMA_FROM_DEVICE);
416 dma_unmap_single(dev, mspi->dma_dummy_tx, PAGE_SIZE, DMA_TO_DEVICE);
417 cpm_muram_free(cpm_muram_offset(mspi->tx_bd));
418 if (!(mspi->flags & SPI_CPM1))
419 cpm_muram_free(cpm_muram_offset(mspi->pram));