From: Lee Jones <lee.jones@linaro.org>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: linus.walleij@linaro.org, dwmw2@infradead.org,
linux-mtd@lists.infradead.org, computersforpeace@gmail.com,
Angus.Clark@st.com, DCG_UPD_stlinux_kernel@list.st.com,
olivier.clergeaud@st.com, Lee Jones <lee.jones@linaro.org>
Subject: [PATCH RESEND v4 05/37] mtd: st_spi_fsm: Supply a method to read from the FSM's FIFO
Date: Thu, 23 Jan 2014 10:30:53 +0000 [thread overview]
Message-ID: <1390473085-24626-6-git-send-email-lee.jones@linaro.org> (raw)
In-Reply-To: <1390473085-24626-1-git-send-email-lee.jones@linaro.org>
When invoked the driver will attempt to read any available data from
the FSM's data register. Any data collected from this FIFO would have
originated from the flash chip.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mtd/devices/st_spi_fsm.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/drivers/mtd/devices/st_spi_fsm.c b/drivers/mtd/devices/st_spi_fsm.c
index c7daeca..0eba759 100644
--- a/drivers/mtd/devices/st_spi_fsm.c
+++ b/drivers/mtd/devices/st_spi_fsm.c
@@ -274,6 +274,32 @@ static void stfsm_wait_seq(struct stfsm *fsm)
dev_err(fsm->dev, "timeout on sequence completion\n");
}
+static void stfsm_read_fifo(struct stfsm *fsm, uint32_t *buf,
+ const uint32_t size)
+{
+ uint32_t remaining = size >> 2;
+ uint32_t avail;
+ uint32_t words;
+
+ dev_dbg(fsm->dev, "Reading %d bytes from FIFO\n", size);
+
+ BUG_ON((((uint32_t)buf) & 0x3) || (size & 0x3));
+
+ while (remaining) {
+ for (;;) {
+ avail = stfsm_fifo_available(fsm);
+ if (avail)
+ break;
+ udelay(1);
+ }
+ words = min(avail, remaining);
+ remaining -= words;
+
+ readsl(fsm->base + SPI_FAST_SEQ_DATA_REG, buf, words);
+ buf += words;
+ }
+}
+
static int stfsm_set_mode(struct stfsm *fsm, uint32_t mode)
{
int ret, timeout = 10;
--
1.8.3.2
next prev parent reply other threads:[~2014-01-23 10:42 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-23 10:30 [PATCH RESEND v4 00/37] mtd: st_spi_fsm: Add new driver Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 01/37] mtd: st_spi_fsm: Allocate resources and register with MTD framework Lee Jones
2014-01-23 14:16 ` Ludovic Barre
2014-01-23 15:55 ` Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 02/37] mtd: st_spi_fsm: Supply all register address and bit logic defines Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 03/37] mtd: st_spi_fsm: Initialise and configure the FSM for normal working conditions Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 04/37] mtd: st_spi_fsm: Supply framework for device requests Lee Jones
2014-01-23 10:30 ` Lee Jones [this message]
2014-01-23 10:30 ` [PATCH RESEND v4 06/37] mtd: st_spi_fsm: Supply defines for the possible flash command opcodes Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 07/37] mtd: st_spi_fsm: Add support for JEDEC ID extraction Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 08/37] mtd: devices: Provide header for shared OPCODEs and SFDP commands Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 09/37] mtd: st_spi_fsm: Provide device look-up table Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 10/37] mtd: st_spi_fsm: Dynamically setup flash device based on JEDEC ID Lee Jones
2014-01-23 10:30 ` [PATCH RESEND v4 11/37] mtd: st_spi_fsm: Search for preferred FSM message sequence configurations Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 12/37] mtd: st_spi_fsm: Fetch platform specific configurations Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 13/37] mtd: st_spi_fsm: Prepare the read/write FSM message sequence(s) Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 14/37] mtd: st_spi_fsm: Add device-tree binding documentation Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 15/37] mtd: st_spi_fsm: Fetch boot-device from mode pins Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 16/37] mtd: st_spi_fsm: Provide the erase one sector sequence Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 17/37] mtd: st_spi_fsm: Provide the sequence for enabling 32bit addressing mode Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 18/37] mtd: st_spi_fsm: Prepare read/write sequences according to configuration Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 19/37] mtd: st_spi_fsm: Add a check to if the chip can handle an SoC reset Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 20/37] mtd: st_spi_fsm: Provide a method to put the chip into 32bit addressing mode Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 21/37] mtd: st_spi_fsm: Update the flash Volatile Configuration Register Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 22/37] mtd: st_spi_fsm: Provide the default read/write configurations Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 23/37] mtd: st_spi_fsm: Supply the N25Qxxx specific read configurations Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 24/37] mtd: st_spi_fsm: Supply the N25Qxxx chip specific configuration call-back Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 25/37] mtd: st_spi_fsm: Prepare default sequences for read/write/erase Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 26/37] mtd: st_spi_fsm: Add the ability to read from a Serial Flash device Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 27/37] mtd: st_spi_fsm: Write to Flash via the FSM FIFO Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 28/37] mtd: st_spi_fsm: Supply a busy wait for post-write status Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 29/37] mtd: st_spi_fsm: Add the ability to write to a Serial Flash device Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 30/37] mtd: st_spi_fsm: Erase partly or as a whole " Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 31/37] mtd: st_spi_fsm: Add the ability to read the FSM's status Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 32/37] mtd: st_spi_fsm: Add the ability to write to FSM's status register Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 33/37] mtd: st_spi_fsm: Supply the MX25xxx chip specific configuration call-back Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 34/37] mtd: st_spi_fsm: Supply the S25FLxxx " Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 35/37] mtd: st_spi_fsm: Supply the W25Qxxx " Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 36/37] mtd: st_spi_fsm: Move runtime configurable msg sequences into device's struct Lee Jones
2014-01-23 10:31 ` [PATCH RESEND v4 37/37] ARM: STi: Add support for the FSM Serial Flash Controller Lee Jones
2014-02-11 15:00 ` [PATCH RESEND v4 00/37] mtd: st_spi_fsm: Add new driver Angus Clark
2014-02-14 10:46 ` Lee Jones
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