From af79fdbe4af32a287798b579141204bda056b8aa Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Thu, 29 Dec 2016 01:07:34 +0100 Subject: ar71xx: remove a non-upstream spi core patch - use standard flags instead - remove dead code from the rb4xx spi drivers Signed-off-by: Felix Fietkau --- target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c | 83 +---------------------- 1 file changed, 3 insertions(+), 80 deletions(-) (limited to 'target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c') diff --git a/target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c b/target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c index 357fd41708..d8c71fb5a7 100644 --- a/target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c +++ b/target/linux/ar71xx/files/drivers/spi/spi-rb4xx.c @@ -135,7 +135,6 @@ static void do_spi_byte_fast(void __iomem *base, unsigned char byte) static int rb4xx_spi_txrx(void __iomem *base, struct spi_transfer *t) { - const unsigned char *rxv_ptr = NULL; const unsigned char *tx_ptr = t->tx_buf; unsigned char *rx_ptr = t->rx_buf; unsigned i; @@ -145,94 +144,21 @@ static int rb4xx_spi_txrx(void __iomem *base, struct spi_transfer *t) (t->tx_buf ? 1 : 0), (t->rx_buf ? 1 : 0)); - if (t->verify) { - rxv_ptr = tx_ptr; - tx_ptr = NULL; - } - for (i = 0; i < t->len; ++i) { unsigned char sdata = tx_ptr ? tx_ptr[i] : 0; - if (t->fast_write) + if (t->tx_nbits == SPI_NBITS_DUAL) do_spi_byte_fast(base, sdata); else do_spi_byte(base, sdata); - if (rx_ptr) { + if (rx_ptr) rx_ptr[i] = __raw_readl(base + AR71XX_SPI_REG_RDS) & 0xff; - } else if (rxv_ptr) { - unsigned char c = __raw_readl(base + AR71XX_SPI_REG_RDS); - if (rxv_ptr[i] != c) - return i; - } } return i; } -static int rb4xx_spi_read_fast(struct rb4xx_spi *rbspi, - struct spi_message *m) -{ - struct spi_transfer *t; - const unsigned char *tx_ptr; - unsigned addr; - void __iomem *base = rbspi->base; - - /* check for exactly two transfers */ - if (list_empty(&m->transfers) || - list_is_last(m->transfers.next, &m->transfers) || - !list_is_last(m->transfers.next->next, &m->transfers)) { - return -1; - } - - /* first transfer contains command and address */ - t = list_entry(m->transfers.next, - struct spi_transfer, transfer_list); - - if (t->len != 5 || t->tx_buf == NULL) - return -1; - - tx_ptr = t->tx_buf; - if (tx_ptr[0] != CPLD_CMD_READ_FAST) - return -1; - - addr = tx_ptr[1]; - addr = tx_ptr[2] | (addr << 8); - addr = tx_ptr[3] | (addr << 8); - addr += (unsigned) base; - - m->actual_length += t->len; - - /* second transfer contains data itself */ - t = list_entry(m->transfers.next->next, - struct spi_transfer, transfer_list); - - if (t->tx_buf && !t->verify) - return -1; - - __raw_writel(AR71XX_SPI_FS_GPIO, base + AR71XX_SPI_REG_FS); - __raw_writel(rbspi->spi_ctrl_fread, base + AR71XX_SPI_REG_CTRL); - __raw_writel(0, base + AR71XX_SPI_REG_FS); - - if (t->rx_buf) { - memcpy(t->rx_buf, (const void *)addr, t->len); - } else if (t->tx_buf) { - unsigned char buf[t->len]; - memcpy(buf, (const void *)addr, t->len); - if (memcmp(t->tx_buf, buf, t->len) != 0) - m->status = -EMSGSIZE; - } - m->actual_length += t->len; - - if (rbspi->spi_ctrl_flash != rbspi->spi_ctrl_fread) { - __raw_writel(AR71XX_SPI_FS_GPIO, base + AR71XX_SPI_REG_FS); - __raw_writel(rbspi->spi_ctrl_flash, base + AR71XX_SPI_REG_CTRL); - __raw_writel(0, base + AR71XX_SPI_REG_FS); - } - - return 0; -} - static int rb4xx_spi_msg(struct rb4xx_spi *rbspi, struct spi_message *m) { struct spi_transfer *t = NULL; @@ -242,10 +168,6 @@ static int rb4xx_spi_msg(struct rb4xx_spi *rbspi, struct spi_message *m) if (list_empty(&m->transfers)) return -1; - if (m->fast_read) - if (rb4xx_spi_read_fast(rbspi, m) == 0) - return -1; - __raw_writel(AR71XX_SPI_FS_GPIO, base + AR71XX_SPI_REG_FS); __raw_writel(SPI_CTRL_FASTEST, base + AR71XX_SPI_REG_CTRL); do_spi_init(m->spi); @@ -402,6 +324,7 @@ static int rb4xx_spi_probe(struct platform_device *pdev) master->bus_num = 0; master->num_chipselect = 3; + master->mode_bits = SPI_TX_DUAL; master->setup = rb4xx_spi_setup; master->transfer = rb4xx_spi_transfer; -- cgit v1.2.3