From cdb6a00fb8f96b9259ed7d77a1eacbfa3777ddac Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Mon, 11 Apr 2011 23:39:28 -0400 Subject: [PATCH] sf: atmel: undo unification of status polling The AT45 flashes are completely different (at the command set and status register level) from all other SPI flashes, so we can't unify their logic with common code. Signed-off-by: Mike Frysinger --- drivers/mtd/spi/atmel.c | 31 +++++++++++++++++++++++++++++-- 1 file changed, 29 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/spi/atmel.c b/drivers/mtd/spi/atmel.c index a9910b11b8..10df3879e0 100644 --- a/drivers/mtd/spi/atmel.c +++ b/drivers/mtd/spi/atmel.c @@ -113,8 +113,35 @@ static const struct atmel_spi_flash_params atmel_spi_flash_table[] = { static int at45_wait_ready(struct spi_flash *flash, unsigned long timeout) { - return spi_flash_cmd_poll_bit(flash, timeout, - CMD_AT45_READ_STATUS, AT45_STATUS_READY); + struct spi_slave *spi = flash->spi; + unsigned long timebase; + int ret; + u8 cmd = CMD_AT45_READ_STATUS; + u8 status; + + timebase = get_timer(0); + + ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN); + if (ret) + return -1; + + do { + ret = spi_xfer(spi, 8, NULL, &status, 0); + if (ret) + return -1; + + if (status & AT45_STATUS_READY) + break; + } while (get_timer(timebase) < timeout); + + /* Deactivate CS */ + spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END); + + if (status & AT45_STATUS_READY) + return 0; + + /* Timed out */ + return -1; } /* -- 2.25.1