Lines Matching full:pl022
3 * A driver for the ARM PL022 PrimeCell SSP/SPI bus master.
12 * Initial adoption to PL022 by:
27 #include <linux/amba/pl022.h>
313 * for PL022 derivates
334 * struct pl022 - This is the private SSP driver data structure
368 struct pl022 { struct
443 pr_debug("pl022: dummy chip select control, CS=0x%x\n", command); in null_cs_control()
448 * @pl022: SSP driver private data structure
455 static void internal_cs_control(struct pl022 *pl022, u32 command) in internal_cs_control() argument
459 tmp = readw(SSP_CSR(pl022->virtbase)); in internal_cs_control()
461 tmp &= ~BIT(pl022->cur_cs); in internal_cs_control()
463 tmp |= BIT(pl022->cur_cs); in internal_cs_control()
464 writew(tmp, SSP_CSR(pl022->virtbase)); in internal_cs_control()
467 static void pl022_cs_control(struct pl022 *pl022, u32 command) in pl022_cs_control() argument
469 if (pl022->vendor->internal_cs_ctrl) in pl022_cs_control()
470 internal_cs_control(pl022, command); in pl022_cs_control()
471 else if (gpio_is_valid(pl022->cur_cs)) in pl022_cs_control()
472 gpio_set_value(pl022->cur_cs, command); in pl022_cs_control()
474 pl022->cur_chip->cs_control(command); in pl022_cs_control()
481 * @pl022: SSP driver private data structure
483 static void giveback(struct pl022 *pl022) in giveback() argument
486 pl022->next_msg_cs_active = false; in giveback()
488 last_transfer = list_last_entry(&pl022->cur_msg->transfers, in giveback()
512 next_msg = spi_get_next_queued_message(pl022->master); in giveback()
518 if (next_msg && next_msg->spi != pl022->cur_msg->spi) in giveback()
520 if (!next_msg || pl022->cur_msg->state == STATE_ERROR) in giveback()
521 pl022_cs_control(pl022, SSP_CHIP_DESELECT); in giveback()
523 pl022->next_msg_cs_active = true; in giveback()
527 pl022->cur_msg = NULL; in giveback()
528 pl022->cur_transfer = NULL; in giveback()
529 pl022->cur_chip = NULL; in giveback()
532 writew((readw(SSP_CR1(pl022->virtbase)) & in giveback()
533 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); in giveback()
535 spi_finalize_current_message(pl022->master); in giveback()
540 * @pl022: SSP driver private data structure
542 static int flush(struct pl022 *pl022) in flush() argument
546 dev_dbg(&pl022->adev->dev, "flush\n"); in flush()
548 while (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) in flush()
549 readw(SSP_DR(pl022->virtbase)); in flush()
550 } while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_BSY) && limit--); in flush()
552 pl022->exp_fifo_level = 0; in flush()
559 * @pl022: SSP driver private data structure
561 static void restore_state(struct pl022 *pl022) in restore_state() argument
563 struct chip_data *chip = pl022->cur_chip; in restore_state()
565 if (pl022->vendor->extended_cr) in restore_state()
566 writel(chip->cr0, SSP_CR0(pl022->virtbase)); in restore_state()
568 writew(chip->cr0, SSP_CR0(pl022->virtbase)); in restore_state()
569 writew(chip->cr1, SSP_CR1(pl022->virtbase)); in restore_state()
570 writew(chip->dmacr, SSP_DMACR(pl022->virtbase)); in restore_state()
571 writew(chip->cpsr, SSP_CPSR(pl022->virtbase)); in restore_state()
572 writew(DISABLE_ALL_INTERRUPTS, SSP_IMSC(pl022->virtbase)); in restore_state()
573 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); in restore_state()
649 * @pl022: SSP driver private data structure
651 static void load_ssp_default_config(struct pl022 *pl022) in load_ssp_default_config() argument
653 if (pl022->vendor->pl023) { in load_ssp_default_config()
654 writel(DEFAULT_SSP_REG_CR0_ST_PL023, SSP_CR0(pl022->virtbase)); in load_ssp_default_config()
655 writew(DEFAULT_SSP_REG_CR1_ST_PL023, SSP_CR1(pl022->virtbase)); in load_ssp_default_config()
656 } else if (pl022->vendor->extended_cr) { in load_ssp_default_config()
657 writel(DEFAULT_SSP_REG_CR0_ST, SSP_CR0(pl022->virtbase)); in load_ssp_default_config()
658 writew(DEFAULT_SSP_REG_CR1_ST, SSP_CR1(pl022->virtbase)); in load_ssp_default_config()
660 writew(DEFAULT_SSP_REG_CR0, SSP_CR0(pl022->virtbase)); in load_ssp_default_config()
661 writew(DEFAULT_SSP_REG_CR1, SSP_CR1(pl022->virtbase)); in load_ssp_default_config()
663 writew(DEFAULT_SSP_REG_DMACR, SSP_DMACR(pl022->virtbase)); in load_ssp_default_config()
664 writew(DEFAULT_SSP_REG_CPSR, SSP_CPSR(pl022->virtbase)); in load_ssp_default_config()
665 writew(DISABLE_ALL_INTERRUPTS, SSP_IMSC(pl022->virtbase)); in load_ssp_default_config()
666 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); in load_ssp_default_config()
671 * set in pl022.
673 static void readwriter(struct pl022 *pl022) in readwriter() argument
686 dev_dbg(&pl022->adev->dev, in readwriter()
688 __func__, pl022->rx, pl022->rx_end, pl022->tx, pl022->tx_end); in readwriter()
691 while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) in readwriter()
692 && (pl022->rx < pl022->rx_end)) { in readwriter()
693 switch (pl022->read) { in readwriter()
695 readw(SSP_DR(pl022->virtbase)); in readwriter()
698 *(u8 *) (pl022->rx) = in readwriter()
699 readw(SSP_DR(pl022->virtbase)) & 0xFFU; in readwriter()
702 *(u16 *) (pl022->rx) = in readwriter()
703 (u16) readw(SSP_DR(pl022->virtbase)); in readwriter()
706 *(u32 *) (pl022->rx) = in readwriter()
707 readl(SSP_DR(pl022->virtbase)); in readwriter()
710 pl022->rx += (pl022->cur_chip->n_bytes); in readwriter()
711 pl022->exp_fifo_level--; in readwriter()
716 while ((pl022->exp_fifo_level < pl022->vendor->fifodepth) in readwriter()
717 && (pl022->tx < pl022->tx_end)) { in readwriter()
718 switch (pl022->write) { in readwriter()
720 writew(0x0, SSP_DR(pl022->virtbase)); in readwriter()
723 writew(*(u8 *) (pl022->tx), SSP_DR(pl022->virtbase)); in readwriter()
726 writew((*(u16 *) (pl022->tx)), SSP_DR(pl022->virtbase)); in readwriter()
729 writel(*(u32 *) (pl022->tx), SSP_DR(pl022->virtbase)); in readwriter()
732 pl022->tx += (pl022->cur_chip->n_bytes); in readwriter()
733 pl022->exp_fifo_level++; in readwriter()
740 while ((readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RNE) in readwriter()
741 && (pl022->rx < pl022->rx_end)) { in readwriter()
742 switch (pl022->read) { in readwriter()
744 readw(SSP_DR(pl022->virtbase)); in readwriter()
747 *(u8 *) (pl022->rx) = in readwriter()
748 readw(SSP_DR(pl022->virtbase)) & 0xFFU; in readwriter()
751 *(u16 *) (pl022->rx) = in readwriter()
752 (u16) readw(SSP_DR(pl022->virtbase)); in readwriter()
755 *(u32 *) (pl022->rx) = in readwriter()
756 readl(SSP_DR(pl022->virtbase)); in readwriter()
759 pl022->rx += (pl022->cur_chip->n_bytes); in readwriter()
760 pl022->exp_fifo_level--; in readwriter()
771 * @pl022: SSP driver private data structure
778 static void *next_transfer(struct pl022 *pl022) in next_transfer() argument
780 struct spi_message *msg = pl022->cur_msg; in next_transfer()
781 struct spi_transfer *trans = pl022->cur_transfer; in next_transfer()
785 pl022->cur_transfer = in next_transfer()
798 static void unmap_free_dma_scatter(struct pl022 *pl022) in unmap_free_dma_scatter() argument
801 dma_unmap_sg(pl022->dma_tx_channel->device->dev, pl022->sgt_tx.sgl, in unmap_free_dma_scatter()
802 pl022->sgt_tx.nents, DMA_TO_DEVICE); in unmap_free_dma_scatter()
803 dma_unmap_sg(pl022->dma_rx_channel->device->dev, pl022->sgt_rx.sgl, in unmap_free_dma_scatter()
804 pl022->sgt_rx.nents, DMA_FROM_DEVICE); in unmap_free_dma_scatter()
805 sg_free_table(&pl022->sgt_rx); in unmap_free_dma_scatter()
806 sg_free_table(&pl022->sgt_tx); in unmap_free_dma_scatter()
811 struct pl022 *pl022 = data; in dma_callback() local
812 struct spi_message *msg = pl022->cur_msg; in dma_callback()
814 BUG_ON(!pl022->sgt_rx.sgl); in dma_callback()
827 dma_sync_sg_for_cpu(&pl022->adev->dev, in dma_callback()
828 pl022->sgt_rx.sgl, in dma_callback()
829 pl022->sgt_rx.nents, in dma_callback()
832 for_each_sg(pl022->sgt_rx.sgl, sg, pl022->sgt_rx.nents, i) { in dma_callback()
833 dev_dbg(&pl022->adev->dev, "SPI RX SG ENTRY: %d", i); in dma_callback()
842 for_each_sg(pl022->sgt_tx.sgl, sg, pl022->sgt_tx.nents, i) { in dma_callback()
843 dev_dbg(&pl022->adev->dev, "SPI TX SG ENTRY: %d", i); in dma_callback()
855 unmap_free_dma_scatter(pl022); in dma_callback()
858 msg->actual_length += pl022->cur_transfer->len; in dma_callback()
860 msg->state = next_transfer(pl022); in dma_callback()
861 if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change) in dma_callback()
862 pl022_cs_control(pl022, SSP_CHIP_DESELECT); in dma_callback()
863 tasklet_schedule(&pl022->pump_transfers); in dma_callback()
866 static void setup_dma_scatter(struct pl022 *pl022, in setup_dma_scatter() argument
893 dev_dbg(&pl022->adev->dev, in setup_dma_scatter()
904 sg_set_page(sg, virt_to_page(pl022->dummypage), in setup_dma_scatter()
907 dev_dbg(&pl022->adev->dev, in setup_dma_scatter()
918 * @pl022: SSP driver's private data structure
920 static int configure_dma(struct pl022 *pl022) in configure_dma() argument
923 .src_addr = SSP_DR(pl022->phybase), in configure_dma()
928 .dst_addr = SSP_DR(pl022->phybase), in configure_dma()
935 struct dma_chan *rxchan = pl022->dma_rx_channel; in configure_dma()
936 struct dma_chan *txchan = pl022->dma_tx_channel; in configure_dma()
950 switch (pl022->rx_lev_trig) { in configure_dma()
967 rx_conf.src_maxburst = pl022->vendor->fifodepth >> 1; in configure_dma()
971 switch (pl022->tx_lev_trig) { in configure_dma()
988 tx_conf.dst_maxburst = pl022->vendor->fifodepth >> 1; in configure_dma()
992 switch (pl022->read) { in configure_dma()
1008 switch (pl022->write) { in configure_dma()
1035 pages = DIV_ROUND_UP(pl022->cur_transfer->len, PAGE_SIZE); in configure_dma()
1036 dev_dbg(&pl022->adev->dev, "using %d pages for transfer\n", pages); in configure_dma()
1038 ret = sg_alloc_table(&pl022->sgt_rx, pages, GFP_ATOMIC); in configure_dma()
1042 ret = sg_alloc_table(&pl022->sgt_tx, pages, GFP_ATOMIC); in configure_dma()
1047 setup_dma_scatter(pl022, pl022->rx, in configure_dma()
1048 pl022->cur_transfer->len, &pl022->sgt_rx); in configure_dma()
1049 setup_dma_scatter(pl022, pl022->tx, in configure_dma()
1050 pl022->cur_transfer->len, &pl022->sgt_tx); in configure_dma()
1053 rx_sglen = dma_map_sg(rxchan->device->dev, pl022->sgt_rx.sgl, in configure_dma()
1054 pl022->sgt_rx.nents, DMA_FROM_DEVICE); in configure_dma()
1058 tx_sglen = dma_map_sg(txchan->device->dev, pl022->sgt_tx.sgl, in configure_dma()
1059 pl022->sgt_tx.nents, DMA_TO_DEVICE); in configure_dma()
1065 pl022->sgt_rx.sgl, in configure_dma()
1073 pl022->sgt_tx.sgl, in configure_dma()
1082 rxdesc->callback_param = pl022; in configure_dma()
1089 pl022->dma_running = true; in configure_dma()
1097 dma_unmap_sg(txchan->device->dev, pl022->sgt_tx.sgl, in configure_dma()
1098 pl022->sgt_tx.nents, DMA_TO_DEVICE); in configure_dma()
1100 dma_unmap_sg(rxchan->device->dev, pl022->sgt_rx.sgl, in configure_dma()
1101 pl022->sgt_rx.nents, DMA_FROM_DEVICE); in configure_dma()
1103 sg_free_table(&pl022->sgt_tx); in configure_dma()
1105 sg_free_table(&pl022->sgt_rx); in configure_dma()
1110 static int pl022_dma_probe(struct pl022 *pl022) in pl022_dma_probe() argument
1121 pl022->dma_rx_channel = dma_request_channel(mask, in pl022_dma_probe()
1122 pl022->master_info->dma_filter, in pl022_dma_probe()
1123 pl022->master_info->dma_rx_param); in pl022_dma_probe()
1124 if (!pl022->dma_rx_channel) { in pl022_dma_probe()
1125 dev_dbg(&pl022->adev->dev, "no RX DMA channel!\n"); in pl022_dma_probe()
1129 pl022->dma_tx_channel = dma_request_channel(mask, in pl022_dma_probe()
1130 pl022->master_info->dma_filter, in pl022_dma_probe()
1131 pl022->master_info->dma_tx_param); in pl022_dma_probe()
1132 if (!pl022->dma_tx_channel) { in pl022_dma_probe()
1133 dev_dbg(&pl022->adev->dev, "no TX DMA channel!\n"); in pl022_dma_probe()
1137 pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL); in pl022_dma_probe()
1138 if (!pl022->dummypage) in pl022_dma_probe()
1141 dev_info(&pl022->adev->dev, "setup for DMA on RX %s, TX %s\n", in pl022_dma_probe()
1142 dma_chan_name(pl022->dma_rx_channel), in pl022_dma_probe()
1143 dma_chan_name(pl022->dma_tx_channel)); in pl022_dma_probe()
1148 dma_release_channel(pl022->dma_tx_channel); in pl022_dma_probe()
1150 dma_release_channel(pl022->dma_rx_channel); in pl022_dma_probe()
1151 pl022->dma_rx_channel = NULL; in pl022_dma_probe()
1153 dev_err(&pl022->adev->dev, in pl022_dma_probe()
1158 static int pl022_dma_autoprobe(struct pl022 *pl022) in pl022_dma_autoprobe() argument
1160 struct device *dev = &pl022->adev->dev; in pl022_dma_autoprobe()
1171 pl022->dma_rx_channel = chan; in pl022_dma_autoprobe()
1179 pl022->dma_tx_channel = chan; in pl022_dma_autoprobe()
1181 pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL); in pl022_dma_autoprobe()
1182 if (!pl022->dummypage) { in pl022_dma_autoprobe()
1190 dma_release_channel(pl022->dma_tx_channel); in pl022_dma_autoprobe()
1191 pl022->dma_tx_channel = NULL; in pl022_dma_autoprobe()
1193 dma_release_channel(pl022->dma_rx_channel); in pl022_dma_autoprobe()
1194 pl022->dma_rx_channel = NULL; in pl022_dma_autoprobe()
1199 static void terminate_dma(struct pl022 *pl022) in terminate_dma() argument
1201 struct dma_chan *rxchan = pl022->dma_rx_channel; in terminate_dma()
1202 struct dma_chan *txchan = pl022->dma_tx_channel; in terminate_dma()
1206 unmap_free_dma_scatter(pl022); in terminate_dma()
1207 pl022->dma_running = false; in terminate_dma()
1210 static void pl022_dma_remove(struct pl022 *pl022) in pl022_dma_remove() argument
1212 if (pl022->dma_running) in pl022_dma_remove()
1213 terminate_dma(pl022); in pl022_dma_remove()
1214 if (pl022->dma_tx_channel) in pl022_dma_remove()
1215 dma_release_channel(pl022->dma_tx_channel); in pl022_dma_remove()
1216 if (pl022->dma_rx_channel) in pl022_dma_remove()
1217 dma_release_channel(pl022->dma_rx_channel); in pl022_dma_remove()
1218 kfree(pl022->dummypage); in pl022_dma_remove()
1222 static inline int configure_dma(struct pl022 *pl022) in configure_dma() argument
1227 static inline int pl022_dma_autoprobe(struct pl022 *pl022) in pl022_dma_autoprobe() argument
1232 static inline int pl022_dma_probe(struct pl022 *pl022) in pl022_dma_probe() argument
1237 static inline void pl022_dma_remove(struct pl022 *pl022) in pl022_dma_remove() argument
1257 struct pl022 *pl022 = dev_id; in pl022_interrupt_handler() local
1258 struct spi_message *msg = pl022->cur_msg; in pl022_interrupt_handler()
1262 dev_err(&pl022->adev->dev, in pl022_interrupt_handler()
1269 irq_status = readw(SSP_MIS(pl022->virtbase)); in pl022_interrupt_handler()
1284 dev_err(&pl022->adev->dev, "FIFO overrun\n"); in pl022_interrupt_handler()
1285 if (readw(SSP_SR(pl022->virtbase)) & SSP_SR_MASK_RFF) in pl022_interrupt_handler()
1286 dev_err(&pl022->adev->dev, in pl022_interrupt_handler()
1295 SSP_IMSC(pl022->virtbase)); in pl022_interrupt_handler()
1296 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); in pl022_interrupt_handler()
1297 writew((readw(SSP_CR1(pl022->virtbase)) & in pl022_interrupt_handler()
1298 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); in pl022_interrupt_handler()
1302 tasklet_schedule(&pl022->pump_transfers); in pl022_interrupt_handler()
1306 readwriter(pl022); in pl022_interrupt_handler()
1308 if (pl022->tx == pl022->tx_end) { in pl022_interrupt_handler()
1310 writew((readw(SSP_IMSC(pl022->virtbase)) & in pl022_interrupt_handler()
1312 SSP_IMSC(pl022->virtbase)); in pl022_interrupt_handler()
1320 if (pl022->rx >= pl022->rx_end) { in pl022_interrupt_handler()
1322 SSP_IMSC(pl022->virtbase)); in pl022_interrupt_handler()
1323 writew(CLEAR_ALL_INTERRUPTS, SSP_ICR(pl022->virtbase)); in pl022_interrupt_handler()
1324 if (unlikely(pl022->rx > pl022->rx_end)) { in pl022_interrupt_handler()
1325 dev_warn(&pl022->adev->dev, "read %u surplus " in pl022_interrupt_handler()
1328 (u32) (pl022->rx - pl022->rx_end)); in pl022_interrupt_handler()
1331 msg->actual_length += pl022->cur_transfer->len; in pl022_interrupt_handler()
1333 msg->state = next_transfer(pl022); in pl022_interrupt_handler()
1334 if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change) in pl022_interrupt_handler()
1335 pl022_cs_control(pl022, SSP_CHIP_DESELECT); in pl022_interrupt_handler()
1336 tasklet_schedule(&pl022->pump_transfers); in pl022_interrupt_handler()
1347 static int set_up_next_transfer(struct pl022 *pl022, in set_up_next_transfer() argument
1353 residue = pl022->cur_transfer->len % pl022->cur_chip->n_bytes; in set_up_next_transfer()
1355 dev_err(&pl022->adev->dev, in set_up_next_transfer()
1358 pl022->cur_transfer->len, in set_up_next_transfer()
1359 pl022->cur_chip->n_bytes); in set_up_next_transfer()
1360 dev_err(&pl022->adev->dev, "skipping this message\n"); in set_up_next_transfer()
1363 pl022->tx = (void *)transfer->tx_buf; in set_up_next_transfer()
1364 pl022->tx_end = pl022->tx + pl022->cur_transfer->len; in set_up_next_transfer()
1365 pl022->rx = (void *)transfer->rx_buf; in set_up_next_transfer()
1366 pl022->rx_end = pl022->rx + pl022->cur_transfer->len; in set_up_next_transfer()
1367 pl022->write = in set_up_next_transfer()
1368 pl022->tx ? pl022->cur_chip->write : WRITING_NULL; in set_up_next_transfer()
1369 pl022->read = pl022->rx ? pl022->cur_chip->read : READING_NULL; in set_up_next_transfer()
1381 struct pl022 *pl022 = (struct pl022 *) data; in pump_transfers() local
1387 message = pl022->cur_msg; in pump_transfers()
1388 transfer = pl022->cur_transfer; in pump_transfers()
1393 giveback(pl022); in pump_transfers()
1400 giveback(pl022); in pump_transfers()
1417 pl022_cs_control(pl022, SSP_CHIP_SELECT); in pump_transfers()
1423 if (set_up_next_transfer(pl022, transfer)) { in pump_transfers()
1426 giveback(pl022); in pump_transfers()
1430 flush(pl022); in pump_transfers()
1432 if (pl022->cur_chip->enable_dma) { in pump_transfers()
1433 if (configure_dma(pl022)) { in pump_transfers()
1434 dev_dbg(&pl022->adev->dev, in pump_transfers()
1443 writew(ENABLE_ALL_INTERRUPTS & ~SSP_IMSC_MASK_RXIM, SSP_IMSC(pl022->virtbase)); in pump_transfers()
1446 static void do_interrupt_dma_transfer(struct pl022 *pl022) in do_interrupt_dma_transfer() argument
1455 if (!pl022->next_msg_cs_active) in do_interrupt_dma_transfer()
1456 pl022_cs_control(pl022, SSP_CHIP_SELECT); in do_interrupt_dma_transfer()
1458 if (set_up_next_transfer(pl022, pl022->cur_transfer)) { in do_interrupt_dma_transfer()
1460 pl022->cur_msg->state = STATE_ERROR; in do_interrupt_dma_transfer()
1461 pl022->cur_msg->status = -EIO; in do_interrupt_dma_transfer()
1462 giveback(pl022); in do_interrupt_dma_transfer()
1466 if (pl022->cur_chip->enable_dma) { in do_interrupt_dma_transfer()
1468 if (configure_dma(pl022)) { in do_interrupt_dma_transfer()
1469 dev_dbg(&pl022->adev->dev, in do_interrupt_dma_transfer()
1478 writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), in do_interrupt_dma_transfer()
1479 SSP_CR1(pl022->virtbase)); in do_interrupt_dma_transfer()
1480 writew(irqflags, SSP_IMSC(pl022->virtbase)); in do_interrupt_dma_transfer()
1483 static void print_current_status(struct pl022 *pl022) in print_current_status() argument
1488 if (pl022->vendor->extended_cr) in print_current_status()
1489 read_cr0 = readl(SSP_CR0(pl022->virtbase)); in print_current_status()
1491 read_cr0 = readw(SSP_CR0(pl022->virtbase)); in print_current_status()
1492 read_cr1 = readw(SSP_CR1(pl022->virtbase)); in print_current_status()
1493 read_dmacr = readw(SSP_DMACR(pl022->virtbase)); in print_current_status()
1494 read_sr = readw(SSP_SR(pl022->virtbase)); in print_current_status()
1496 dev_warn(&pl022->adev->dev, "spi-pl022 CR0: %x\n", read_cr0); in print_current_status()
1497 dev_warn(&pl022->adev->dev, "spi-pl022 CR1: %x\n", read_cr1); in print_current_status()
1498 dev_warn(&pl022->adev->dev, "spi-pl022 DMACR: %x\n", read_dmacr); in print_current_status()
1499 dev_warn(&pl022->adev->dev, "spi-pl022 SR: %x\n", read_sr); in print_current_status()
1500 dev_warn(&pl022->adev->dev, in print_current_status()
1501 "spi-pl022 exp_fifo_level/fifodepth: %u/%d\n", in print_current_status()
1502 pl022->exp_fifo_level, in print_current_status()
1503 pl022->vendor->fifodepth); in print_current_status()
1507 static void do_polling_transfer(struct pl022 *pl022) in do_polling_transfer() argument
1514 message = pl022->cur_msg; in do_polling_transfer()
1520 transfer = pl022->cur_transfer; in do_polling_transfer()
1529 pl022_cs_control(pl022, SSP_CHIP_SELECT); in do_polling_transfer()
1533 if (!pl022->next_msg_cs_active) in do_polling_transfer()
1534 pl022_cs_control(pl022, SSP_CHIP_SELECT); in do_polling_transfer()
1538 if (set_up_next_transfer(pl022, transfer)) { in do_polling_transfer()
1544 flush(pl022); in do_polling_transfer()
1545 writew((readw(SSP_CR1(pl022->virtbase)) | SSP_CR1_MASK_SSE), in do_polling_transfer()
1546 SSP_CR1(pl022->virtbase)); in do_polling_transfer()
1548 dev_dbg(&pl022->adev->dev, "polling transfer ongoing ...\n"); in do_polling_transfer()
1551 while (pl022->tx < pl022->tx_end || pl022->rx < pl022->rx_end) { in do_polling_transfer()
1553 readwriter(pl022); in do_polling_transfer()
1555 dev_warn(&pl022->adev->dev, in do_polling_transfer()
1558 print_current_status(pl022); in do_polling_transfer()
1565 message->actual_length += pl022->cur_transfer->len; in do_polling_transfer()
1567 message->state = next_transfer(pl022); in do_polling_transfer()
1569 && pl022->cur_transfer->cs_change) in do_polling_transfer()
1570 pl022_cs_control(pl022, SSP_CHIP_DESELECT); in do_polling_transfer()
1581 giveback(pl022); in do_polling_transfer()
1588 struct pl022 *pl022 = spi_master_get_devdata(master); in pl022_transfer_one_message() local
1591 pl022->cur_msg = msg; in pl022_transfer_one_message()
1594 pl022->cur_transfer = list_entry(msg->transfers.next, in pl022_transfer_one_message()
1598 pl022->cur_chip = spi_get_ctldata(msg->spi); in pl022_transfer_one_message()
1599 pl022->cur_cs = pl022->chipselects[msg->spi->chip_select]; in pl022_transfer_one_message()
1601 restore_state(pl022); in pl022_transfer_one_message()
1602 flush(pl022); in pl022_transfer_one_message()
1604 if (pl022->cur_chip->xfer_type == POLLING_TRANSFER) in pl022_transfer_one_message()
1605 do_polling_transfer(pl022); in pl022_transfer_one_message()
1607 do_interrupt_dma_transfer(pl022); in pl022_transfer_one_message()
1614 struct pl022 *pl022 = spi_master_get_devdata(master); in pl022_unprepare_transfer_hardware() local
1617 writew((readw(SSP_CR1(pl022->virtbase)) & in pl022_unprepare_transfer_hardware()
1618 (~SSP_CR1_MASK_SSE)), SSP_CR1(pl022->virtbase)); in pl022_unprepare_transfer_hardware()
1623 static int verify_controller_parameters(struct pl022 *pl022, in verify_controller_parameters() argument
1628 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1633 (!pl022->vendor->unidir)) { in verify_controller_parameters()
1634 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1641 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1648 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1659 if (pl022->vendor->fifodepth < 16) { in verify_controller_parameters()
1660 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1666 if (pl022->vendor->fifodepth < 32) { in verify_controller_parameters()
1667 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1673 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1684 if (pl022->vendor->fifodepth < 16) { in verify_controller_parameters()
1685 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1691 if (pl022->vendor->fifodepth < 32) { in verify_controller_parameters()
1692 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1698 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1705 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1711 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1716 if (pl022->vendor->extended_cr) { in verify_controller_parameters()
1721 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1727 dev_err(&pl022->adev->dev, in verify_controller_parameters()
1730 " ST version of PL022\n"); in verify_controller_parameters()
1742 static int calculate_effective_freq(struct pl022 *pl022, int freq, struct in calculate_effective_freq() argument
1750 rate = clk_get_rate(pl022->clk); in calculate_effective_freq()
1757 dev_warn(&pl022->adev->dev, in calculate_effective_freq()
1762 dev_err(&pl022->adev->dev, in calculate_effective_freq()
1804 WARN(!best_freq, "pl022: Matching cpsdvsr and scr not found for %d Hz rate \n", in calculate_effective_freq()
1809 dev_dbg(&pl022->adev->dev, in calculate_effective_freq()
1812 dev_dbg(&pl022->adev->dev, "SSP cpsdvsr = %d, scr = %d\n", in calculate_effective_freq()
1854 struct pl022 *pl022 = spi_master_get_devdata(spi->master); in pl022_setup() local
1881 of_property_read_u32(np, "pl022,interface", in pl022_setup()
1883 of_property_read_u32(np, "pl022,com-mode", in pl022_setup()
1885 of_property_read_u32(np, "pl022,rx-level-trig", in pl022_setup()
1887 of_property_read_u32(np, "pl022,tx-level-trig", in pl022_setup()
1889 of_property_read_u32(np, "pl022,ctrl-len", in pl022_setup()
1891 of_property_read_u32(np, "pl022,wait-state", in pl022_setup()
1893 of_property_read_u32(np, "pl022,duplex", in pl022_setup()
1913 status = calculate_effective_freq(pl022, in pl022_setup()
1932 status = verify_controller_parameters(pl022, chip_info); in pl022_setup()
1938 pl022->rx_lev_trig = chip_info->rx_lev_trig; in pl022_setup()
1939 pl022->tx_lev_trig = chip_info->tx_lev_trig; in pl022_setup()
1945 if (!gpio_is_valid(pl022->chipselects[spi->chip_select])) in pl022_setup()
1952 if ((bits <= 3) || (bits > pl022->vendor->max_bpw)) { in pl022_setup()
1956 pl022->vendor->max_bpw); in pl022_setup()
1981 && ((pl022->master_info)->enable_dma)) { in pl022_setup()
2000 if (pl022->vendor->extended_cr) { in pl022_setup()
2003 if (pl022->vendor->pl023) { in pl022_setup()
2008 /* These bits are in the PL022 but not PL023 */ in pl022_setup()
2056 if (pl022->vendor->loopback) { in pl022_setup()
2112 of_property_read_u32(np, "pl022,autosuspend-delay", in pl022_platform_data_dt_get()
2114 pd->rt = of_property_read_bool(np, "pl022,rt"); in pl022_platform_data_dt_get()
2125 struct pl022 *pl022 = NULL; /*Data for this driver */ in pl022_probe() local
2130 "ARM PL022 driver, device ID: 0x%08x\n", adev->periphid); in pl022_probe()
2147 master = spi_alloc_master(dev, sizeof(struct pl022)); in pl022_probe()
2153 pl022 = spi_master_get_devdata(master); in pl022_probe()
2154 pl022->master = master; in pl022_probe()
2155 pl022->master_info = platform_info; in pl022_probe()
2156 pl022->adev = adev; in pl022_probe()
2157 pl022->vendor = id->data; in pl022_probe()
2158 pl022->chipselects = devm_kcalloc(dev, num_cs, sizeof(int), in pl022_probe()
2160 if (!pl022->chipselects) { in pl022_probe()
2181 pl022->chipselects[i] = platform_info->chipselects[i]; in pl022_probe()
2182 } else if (pl022->vendor->internal_cs_ctrl) { in pl022_probe()
2184 pl022->chipselects[i] = i; in pl022_probe()
2194 pl022->chipselects[i] = cs_gpio; in pl022_probe()
2197 if (devm_gpio_request(dev, cs_gpio, "ssp-pl022")) in pl022_probe()
2211 * always MS bit first on the original pl022. in pl022_probe()
2214 if (pl022->vendor->extended_cr) in pl022_probe()
2223 pl022->phybase = adev->res.start; in pl022_probe()
2224 pl022->virtbase = devm_ioremap(dev, adev->res.start, in pl022_probe()
2226 if (pl022->virtbase == NULL) { in pl022_probe()
2231 &adev->res.start, pl022->virtbase); in pl022_probe()
2233 pl022->clk = devm_clk_get(&adev->dev, NULL); in pl022_probe()
2234 if (IS_ERR(pl022->clk)) { in pl022_probe()
2235 status = PTR_ERR(pl022->clk); in pl022_probe()
2240 status = clk_prepare_enable(pl022->clk); in pl022_probe()
2247 tasklet_init(&pl022->pump_transfers, pump_transfers, in pl022_probe()
2248 (unsigned long)pl022); in pl022_probe()
2251 writew((readw(SSP_CR1(pl022->virtbase)) & (~SSP_CR1_MASK_SSE)), in pl022_probe()
2252 SSP_CR1(pl022->virtbase)); in pl022_probe()
2253 load_ssp_default_config(pl022); in pl022_probe()
2256 0, "pl022", pl022); in pl022_probe()
2263 status = pl022_dma_autoprobe(pl022); in pl022_probe()
2273 status = pl022_dma_probe(pl022); in pl022_probe()
2279 amba_set_drvdata(adev, pl022); in pl022_probe()
2303 pl022_dma_remove(pl022); in pl022_probe()
2305 clk_disable_unprepare(pl022->clk); in pl022_probe()
2320 struct pl022 *pl022 = amba_get_drvdata(adev); in pl022_remove() local
2322 if (!pl022) in pl022_remove()
2331 load_ssp_default_config(pl022); in pl022_remove()
2332 if (pl022->master_info->enable_dma) in pl022_remove()
2333 pl022_dma_remove(pl022); in pl022_remove()
2335 clk_disable_unprepare(pl022->clk); in pl022_remove()
2337 tasklet_disable(&pl022->pump_transfers); in pl022_remove()
2344 struct pl022 *pl022 = dev_get_drvdata(dev); in pl022_suspend() local
2347 ret = spi_master_suspend(pl022->master); in pl022_suspend()
2353 spi_master_resume(pl022->master); in pl022_suspend()
2365 struct pl022 *pl022 = dev_get_drvdata(dev); in pl022_resume() local
2373 ret = spi_master_resume(pl022->master); in pl022_resume()
2384 struct pl022 *pl022 = dev_get_drvdata(dev); in pl022_runtime_suspend() local
2386 clk_disable_unprepare(pl022->clk); in pl022_runtime_suspend()
2394 struct pl022 *pl022 = dev_get_drvdata(dev); in pl022_runtime_resume() local
2397 clk_prepare_enable(pl022->clk); in pl022_runtime_resume()
2451 * ARM PL022 variant, this has a 16bit wide
2470 * an official ARM number), this is a PL022 SSP block
2481 * PL022 variant that has a chip select control register whih
2495 .name = "ssp-pl022",
2516 MODULE_DESCRIPTION("PL022 SSP Controller Driver");