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[209.85.220.65]) by mx.google.com with SMTPS id 35sor4364200pgx.62.2019.04.19.00.07.55 for (Google Transport Security); Fri, 19 Apr 2019 00:07:55 -0700 (PDT) Received-SPF: pass (google.com: domain of jagan@amarulasolutions.com designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; X-Received: by 2002:a63:6942:: with SMTP id e63mr2361109pgc.102.1555657674596; Fri, 19 Apr 2019 00:07:54 -0700 (PDT) Received: from localhost.localdomain ([115.97.185.144]) by smtp.gmail.com with ESMTPSA id f71sm8343275pfc.109.2019.04.19.00.07.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 19 Apr 2019 00:07:53 -0700 (PDT) From: Jagan Teki To: Tom Rini , u-boot@lists.denx.de Cc: linux-amarula@amarulasolutions.com, Jagan Teki , Oleksandr Zhadan and Michael Durrant Subject: [PATCH v3] spi: Zap fsl_espi driver-related code Date: Fri, 19 Apr 2019 12:37:45 +0530 Message-Id: <20190419070745.9441-1-jagan@amarulasolutions.com> X-Mailer: git-send-email 2.18.0.321.gffc6fa0e3 MIME-Version: 1.0 X-Original-Sender: jagan@amarulasolutions.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@amarulasolutions.com header.s=google header.b=XGYdDD4l; spf=pass (google.com: domain of jagan@amarulasolutions.com designates 209.85.220.65 as permitted sender) smtp.mailfrom=jagan@amarulasolutions.com Content-Type: text/plain; charset="UTF-8" Precedence: list Mailing-list: list linux-amarula@amarulasolutions.com; contact linux-amarula+owners@amarulasolutions.com List-ID: X-Spam-Checked-In-Group: linux-amarula@amarulasolutions.com X-Google-Group-Id: 476853432473 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , 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 Signed-off-by: Jagan Teki --- 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@freescale.com) - */ - -#include - -#include -#include -#include - -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); -}