[U-Boot] [PATCH v3] spi: Zap fsl_espi driver-related code
Jagan Teki
jagan at amarulasolutions.com
Fri Apr 19 07:07:45 UTC 2019
Dropped
- fsl_espi driver
Dropped due to:
- no active updates
- no dm conversion
- multiple pings for asking dm-conversion
- driver-model migration expiry
Cc: Oleksandr Zhadan and Michael Durrant <arcsupport at arcturusnetworks.com>
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
Change for v3:
- rebase on master
board/Arcturus/ucp1020/ucp1020.c | 6 +
drivers/spi/Kconfig | 7 -
drivers/spi/Makefile | 1 -
drivers/spi/fsl_espi.c | 383 -------------------------------
4 files changed, 6 insertions(+), 391 deletions(-)
delete mode 100644 drivers/spi/fsl_espi.c
diff --git a/board/Arcturus/ucp1020/ucp1020.c b/board/Arcturus/ucp1020/ucp1020.c
index 1a1fcb9be9..b07ba60671 100644
--- a/board/Arcturus/ucp1020/ucp1020.c
+++ b/board/Arcturus/ucp1020/ucp1020.c
@@ -43,6 +43,12 @@ void spi_set_speed(struct spi_slave *slave, uint hz)
/* TO DO: It's actially have to be in spi/ */
}
+int spi_cs_is_valid(unsigned int bus, unsigned int cs)
+{
+ /* do nothing, there is no spi driver */
+ return 0;
+}
+
/*
* To be compatible with cmd_gpio
*/
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 8a86878fee..23b089b0e5 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -320,13 +320,6 @@ config CF_SPI
Enable the ColdFire SPI driver. This driver can be used on
some m68k SoCs.
-config FSL_ESPI
- bool "Freescale eSPI driver"
- help
- Enable the Freescale eSPI driver. This driver can be used to
- access the SPI interface and SPI NOR flash on platforms embedding
- this Freescale eSPI IP core.
-
config FSL_QSPI
bool "Freescale QSPI driver"
imply SPI_FLASH_BAR
diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile
index be4b4c140d..88bdf66dbd 100644
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -27,7 +27,6 @@ obj-$(CONFIG_DAVINCI_SPI) += davinci_spi.o
obj-$(CONFIG_DESIGNWARE_SPI) += designware_spi.o
obj-$(CONFIG_EXYNOS_SPI) += exynos_spi.o
obj-$(CONFIG_FSL_DSPI) += fsl_dspi.o
-obj-$(CONFIG_FSL_ESPI) += fsl_espi.o
obj-$(CONFIG_FSL_QSPI) += fsl_qspi.o
obj-$(CONFIG_ICH_SPI) += ich.o
obj-$(CONFIG_KIRKWOOD_SPI) += kirkwood_spi.o
diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c
deleted file mode 100644
index 7444ae1a06..0000000000
--- a/drivers/spi/fsl_espi.c
+++ /dev/null
@@ -1,383 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * eSPI controller driver.
- *
- * Copyright 2010-2011 Freescale Semiconductor, Inc.
- * Author: Mingkai Hu (Mingkai.hu at freescale.com)
- */
-
-#include <common.h>
-
-#include <malloc.h>
-#include <spi.h>
-#include <asm/immap_85xx.h>
-
-struct fsl_spi_slave {
- struct spi_slave slave;
- ccsr_espi_t *espi;
- unsigned int div16;
- unsigned int pm;
- int tx_timeout;
- unsigned int mode;
- size_t cmd_len;
- u8 cmd_buf[16];
- size_t data_len;
- unsigned int max_transfer_length;
-};
-
-#define to_fsl_spi_slave(s) container_of(s, struct fsl_spi_slave, slave)
-#define US_PER_SECOND 1000000UL
-
-#define ESPI_MAX_CS_NUM 4
-#define ESPI_FIFO_WIDTH_BIT 32
-
-#define ESPI_EV_RNE BIT(9)
-#define ESPI_EV_TNF BIT(8)
-#define ESPI_EV_DON BIT(14)
-#define ESPI_EV_TXE BIT(15)
-#define ESPI_EV_RFCNT_SHIFT 24
-#define ESPI_EV_RFCNT_MASK (0x3f << ESPI_EV_RFCNT_SHIFT)
-
-#define ESPI_MODE_EN BIT(31) /* Enable interface */
-#define ESPI_MODE_TXTHR(x) ((x) << 8) /* Tx FIFO threshold */
-#define ESPI_MODE_RXTHR(x) ((x) << 0) /* Rx FIFO threshold */
-
-#define ESPI_COM_CS(x) ((x) << 30)
-#define ESPI_COM_TRANLEN(x) ((x) << 0)
-
-#define ESPI_CSMODE_CI_INACTIVEHIGH BIT(31)
-#define ESPI_CSMODE_CP_BEGIN_EDGCLK BIT(30)
-#define ESPI_CSMODE_REV_MSB_FIRST BIT(29)
-#define ESPI_CSMODE_DIV16 BIT(28)
-#define ESPI_CSMODE_PM(x) ((x) << 24)
-#define ESPI_CSMODE_POL_ASSERTED_LOW BIT(20)
-#define ESPI_CSMODE_LEN(x) ((x) << 16)
-#define ESPI_CSMODE_CSBEF(x) ((x) << 12)
-#define ESPI_CSMODE_CSAFT(x) ((x) << 8)
-#define ESPI_CSMODE_CSCG(x) ((x) << 3)
-
-#define ESPI_CSMODE_INIT_VAL (ESPI_CSMODE_POL_ASSERTED_LOW | \
- ESPI_CSMODE_CSBEF(0) | ESPI_CSMODE_CSAFT(0) | \
- ESPI_CSMODE_CSCG(1))
-
-#define ESPI_MAX_DATA_TRANSFER_LEN 0xFFF0
-
-struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
- unsigned int max_hz, unsigned int mode)
-{
- struct fsl_spi_slave *fsl;
- sys_info_t sysinfo;
- unsigned long spibrg = 0;
- unsigned long spi_freq = 0;
- unsigned char pm = 0;
-
- if (!spi_cs_is_valid(bus, cs))
- return NULL;
-
- fsl = spi_alloc_slave(struct fsl_spi_slave, bus, cs);
- if (!fsl)
- return NULL;
-
- fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
- fsl->mode = mode;
- fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
-
- /* Set eSPI BRG clock source */
- get_sys_info(&sysinfo);
- spibrg = sysinfo.freq_systembus / 2;
- fsl->div16 = 0;
- if ((spibrg / max_hz) > 32) {
- fsl->div16 = ESPI_CSMODE_DIV16;
- pm = spibrg / (max_hz * 16 * 2);
- if (pm > 16) {
- pm = 16;
- debug("Requested speed is too low: %d Hz, %ld Hz "
- "is used.\n", max_hz, spibrg / (32 * 16));
- }
- } else
- pm = spibrg / (max_hz * 2);
- if (pm)
- pm--;
- fsl->pm = pm;
-
- if (fsl->div16)
- spi_freq = spibrg / ((pm + 1) * 2 * 16);
- else
- spi_freq = spibrg / ((pm + 1) * 2);
-
- /* set tx_timeout to 10 times of one espi FIFO entry go out */
- fsl->tx_timeout = DIV_ROUND_UP((US_PER_SECOND * ESPI_FIFO_WIDTH_BIT
- * 10), spi_freq);
-
- return &fsl->slave;
-}
-
-void spi_free_slave(struct spi_slave *slave)
-{
- struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
- free(fsl);
-}
-
-int spi_claim_bus(struct spi_slave *slave)
-{
- struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
- ccsr_espi_t *espi = fsl->espi;
- unsigned char pm = fsl->pm;
- unsigned int cs = slave->cs;
- unsigned int mode = fsl->mode;
- unsigned int div16 = fsl->div16;
- int i;
-
- debug("%s: bus:%i cs:%i\n", __func__, slave->bus, cs);
-
- /* Enable eSPI interface */
- out_be32(&espi->mode, ESPI_MODE_RXTHR(3)
- | ESPI_MODE_TXTHR(4) | ESPI_MODE_EN);
-
- out_be32(&espi->event, 0xffffffff); /* Clear all eSPI events */
- out_be32(&espi->mask, 0x00000000); /* Mask all eSPI interrupts */
-
- /* Init CS mode interface */
- for (i = 0; i < ESPI_MAX_CS_NUM; i++)
- out_be32(&espi->csmode[i], ESPI_CSMODE_INIT_VAL);
-
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs]) &
- ~(ESPI_CSMODE_PM(0xF) | ESPI_CSMODE_DIV16
- | ESPI_CSMODE_CI_INACTIVEHIGH | ESPI_CSMODE_CP_BEGIN_EDGCLK
- | ESPI_CSMODE_REV_MSB_FIRST | ESPI_CSMODE_LEN(0xF)));
-
- /* Set eSPI BRG clock source */
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
- | ESPI_CSMODE_PM(pm) | div16);
-
- /* Set eSPI mode */
- if (mode & SPI_CPHA)
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
- | ESPI_CSMODE_CP_BEGIN_EDGCLK);
- if (mode & SPI_CPOL)
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
- | ESPI_CSMODE_CI_INACTIVEHIGH);
-
- /* Character bit order: msb first */
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
- | ESPI_CSMODE_REV_MSB_FIRST);
-
- /* Character length in bits, between 0x3~0xf, i.e. 4bits~16bits */
- out_be32(&espi->csmode[cs], in_be32(&espi->csmode[cs])
- | ESPI_CSMODE_LEN(7));
-
- return 0;
-}
-
-void spi_release_bus(struct spi_slave *slave)
-{
-
-}
-
-static void fsl_espi_tx(struct fsl_spi_slave *fsl, const void *dout)
-{
- ccsr_espi_t *espi = fsl->espi;
- unsigned int tmpdout, event;
- int tmp_tx_timeout;
-
- if (dout)
- tmpdout = *(u32 *)dout;
- else
- tmpdout = 0;
-
- out_be32(&espi->tx, tmpdout);
- out_be32(&espi->event, ESPI_EV_TNF);
- debug("***spi_xfer:...%08x written\n", tmpdout);
-
- tmp_tx_timeout = fsl->tx_timeout;
- /* Wait for eSPI transmit to go out */
- while (tmp_tx_timeout--) {
- event = in_be32(&espi->event);
- if (event & ESPI_EV_DON || event & ESPI_EV_TXE) {
- out_be32(&espi->event, ESPI_EV_TXE);
- break;
- }
- udelay(1);
- }
-
- if (tmp_tx_timeout < 0)
- debug("***spi_xfer:...Tx timeout! event = %08x\n", event);
-}
-
-static int fsl_espi_rx(struct fsl_spi_slave *fsl, void *din, unsigned int bytes)
-{
- ccsr_espi_t *espi = fsl->espi;
- unsigned int tmpdin, rx_times;
- unsigned char *buf, *p_cursor;
-
- if (bytes <= 0)
- return 0;
-
- rx_times = DIV_ROUND_UP(bytes, 4);
- buf = (unsigned char *)malloc(4 * rx_times);
- if (!buf) {
- debug("SF: Failed to malloc memory.\n");
- return -1;
- }
- p_cursor = buf;
- while (rx_times--) {
- tmpdin = in_be32(&espi->rx);
- debug("***spi_xfer:...%08x readed\n", tmpdin);
- *(u32 *)p_cursor = tmpdin;
- p_cursor += 4;
- }
-
- if (din)
- memcpy(din, buf, bytes);
-
- free(buf);
- out_be32(&espi->event, ESPI_EV_RNE);
-
- return bytes;
-}
-
-int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *data_out,
- void *data_in, unsigned long flags)
-{
- struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
- ccsr_espi_t *espi = fsl->espi;
- unsigned int event, rx_bytes;
- const void *dout = NULL;
- void *din = NULL;
- int len = 0;
- int num_blks, num_chunks, max_tran_len, tran_len;
- int num_bytes;
- unsigned char *buffer = NULL;
- size_t buf_len;
- u8 *cmd_buf = fsl->cmd_buf;
- size_t cmd_len = fsl->cmd_len;
- size_t data_len = bitlen / 8;
- size_t rx_offset = 0;
- int rf_cnt;
-
- max_tran_len = fsl->max_transfer_length;
- switch (flags) {
- case SPI_XFER_BEGIN:
- cmd_len = fsl->cmd_len = data_len;
- memcpy(cmd_buf, data_out, cmd_len);
- return 0;
- case 0:
- case SPI_XFER_END:
- if (bitlen == 0) {
- spi_cs_deactivate(slave);
- return 0;
- }
- buf_len = 2 * cmd_len + min(data_len, (size_t)max_tran_len);
- len = cmd_len + data_len;
- rx_offset = cmd_len;
- buffer = (unsigned char *)malloc(buf_len);
- if (!buffer) {
- debug("SF: Failed to malloc memory.\n");
- return 1;
- }
- memcpy(buffer, cmd_buf, cmd_len);
- if (data_in == NULL)
- memcpy(buffer + cmd_len, data_out, data_len);
- break;
- case SPI_XFER_BEGIN | SPI_XFER_END:
- len = data_len;
- buffer = (unsigned char *)malloc(len * 2);
- if (!buffer) {
- debug("SF: Failed to malloc memory.\n");
- return 1;
- }
- memcpy(buffer, data_out, len);
- rx_offset = len;
- cmd_len = 0;
- break;
- }
-
- debug("spi_xfer: data_out %08X(%p) data_in %08X(%p) len %u\n",
- *(uint *)data_out, data_out, *(uint *)data_in, data_in, len);
-
- num_chunks = DIV_ROUND_UP(data_len, max_tran_len);
- while (num_chunks--) {
- if (data_in)
- din = buffer + rx_offset;
- dout = buffer;
- tran_len = min(data_len, (size_t)max_tran_len);
- num_blks = DIV_ROUND_UP(tran_len + cmd_len, 4);
- num_bytes = (tran_len + cmd_len) % 4;
- fsl->data_len = tran_len + cmd_len;
- spi_cs_activate(slave);
-
- /* Clear all eSPI events */
- out_be32(&espi->event , 0xffffffff);
- /* handle data in 32-bit chunks */
- while (num_blks) {
- event = in_be32(&espi->event);
- if (event & ESPI_EV_TNF) {
- fsl_espi_tx(fsl, dout);
- /* Set up the next iteration */
- if (len > 4) {
- len -= 4;
- dout += 4;
- }
- }
-
- event = in_be32(&espi->event);
- if (event & ESPI_EV_RNE) {
- rf_cnt = ((event & ESPI_EV_RFCNT_MASK)
- >> ESPI_EV_RFCNT_SHIFT);
- if (rf_cnt >= 4)
- rx_bytes = 4;
- else if (num_blks == 1 && rf_cnt == num_bytes)
- rx_bytes = num_bytes;
- else
- continue;
- if (fsl_espi_rx(fsl, din, rx_bytes)
- == rx_bytes) {
- num_blks--;
- if (din)
- din = (unsigned char *)din
- + rx_bytes;
- }
- }
- }
- if (data_in) {
- memcpy(data_in, buffer + 2 * cmd_len, tran_len);
- if (*buffer == 0x0b) {
- data_in += tran_len;
- data_len -= tran_len;
- *(int *)buffer += tran_len;
- }
- }
- spi_cs_deactivate(slave);
- }
-
- free(buffer);
- return 0;
-}
-
-int spi_cs_is_valid(unsigned int bus, unsigned int cs)
-{
- return bus == 0 && cs < ESPI_MAX_CS_NUM;
-}
-
-void spi_cs_activate(struct spi_slave *slave)
-{
- struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
- ccsr_espi_t *espi = fsl->espi;
- unsigned int com = 0;
- size_t data_len = fsl->data_len;
-
- com &= ~(ESPI_COM_CS(0x3) | ESPI_COM_TRANLEN(0xFFFF));
- com |= ESPI_COM_CS(slave->cs);
- com |= ESPI_COM_TRANLEN(data_len - 1);
- out_be32(&espi->com, com);
-}
-
-void spi_cs_deactivate(struct spi_slave *slave)
-{
- struct fsl_spi_slave *fsl = to_fsl_spi_slave(slave);
- ccsr_espi_t *espi = fsl->espi;
-
- /* clear the RXCNT and TXCNT */
- out_be32(&espi->mode, in_be32(&espi->mode) & (~ESPI_MODE_EN));
- out_be32(&espi->mode, in_be32(&espi->mode) | ESPI_MODE_EN);
-}
--
2.18.0.321.gffc6fa0e3
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