i2400m/SDIO: firmware upload backend
This implements the backends for the generic driver (i2400m) to be able to load firmware to the SDIO device. Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Inaky Perez-Gonzalez
Greg Kroah-Hartman
Родитель
a0848826bf
Коммит
020bb6f30b
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/*
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* Intel Wireless WiMAX Connection 2400m
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* Firmware uploader's SDIO specifics
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*
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*
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* Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*
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* Intel Corporation <linux-wimax@intel.com>
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* Yanir Lubetkin <yanirx.lubetkin@intel.com>
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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* - Initial implementation
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*
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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* - Bus generic/specific split for USB
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*
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* Dirk Brandewie <dirk.j.brandewie@intel.com>
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* - Initial implementation for SDIO
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*
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* Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
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* - SDIO rehash for changes in the bus-driver model
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*
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* THE PROCEDURE
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*
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* See fw.c for the generic description of this procedure.
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*
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* This file implements only the SDIO specifics. It boils down to how
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* to send a command and waiting for an acknowledgement from the
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* device. We do polled reads.
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*
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* COMMAND EXECUTION
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*
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* THe generic firmware upload code will call i2400m_bus_bm_cmd_send()
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* to send commands.
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*
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* The SDIO devices expects things in 256 byte blocks, so it will pad
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* it, compute the checksum (if needed) and pass it to SDIO.
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*
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* ACK RECEPTION
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*
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* This works in polling mode -- the fw loader says when to wait for
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* data and for that it calls i2400ms_bus_bm_wait_for_ack().
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*
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* This will poll the device for data until it is received. We need to
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* receive at least as much bytes as where asked for (although it'll
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* always be a multiple of 256 bytes).
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*/
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#include <linux/mmc/sdio_func.h>
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#include "i2400m-sdio.h"
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#define D_SUBMODULE fw
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#include "sdio-debug-levels.h"
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/*
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* Send a boot-mode command to the SDIO function
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*
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* We use a bounce buffer (i2400m->bm_cmd_buf) because we need to
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* touch the header if the RAW flag is not set.
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*
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* @flags: pass thru from i2400m_bm_cmd()
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* @return: cmd_size if ok, < 0 errno code on error.
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*
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* Note the command is padded to the SDIO block size for the device.
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*/
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ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *i2400m,
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const struct i2400m_bootrom_header *_cmd,
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size_t cmd_size, int flags)
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{
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ssize_t result;
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struct device *dev = i2400m_dev(i2400m);
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struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
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int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
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struct i2400m_bootrom_header *cmd;
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/* SDIO restriction */
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size_t cmd_size_a = ALIGN(cmd_size, I2400MS_BLK_SIZE);
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d_fnstart(5, dev, "(i2400m %p cmd %p size %zu)\n",
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i2400m, _cmd, cmd_size);
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result = -E2BIG;
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if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
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goto error_too_big;
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memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size); /* Prep command */
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cmd = i2400m->bm_cmd_buf;
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if (cmd_size_a > cmd_size) /* Zero pad space */
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memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
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if ((flags & I2400M_BM_CMD_RAW) == 0) {
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if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
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dev_warn(dev, "SW BUG: response_required == 0\n");
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i2400m_bm_cmd_prepare(cmd);
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}
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d_printf(4, dev, "BM cmd %d: %zu bytes (%zu padded)\n",
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opcode, cmd_size, cmd_size_a);
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d_dump(5, dev, cmd, cmd_size);
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sdio_claim_host(i2400ms->func); /* Send & check */
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result = sdio_memcpy_toio(i2400ms->func, I2400MS_DATA_ADDR,
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i2400m->bm_cmd_buf, cmd_size_a);
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sdio_release_host(i2400ms->func);
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if (result < 0) {
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dev_err(dev, "BM cmd %d: cannot send: %ld\n",
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opcode, (long) result);
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goto error_cmd_send;
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}
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result = cmd_size;
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error_cmd_send:
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error_too_big:
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d_fnend(5, dev, "(i2400m %p cmd %p size %zu) = %d\n",
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i2400m, _cmd, cmd_size, (int) result);
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return result;
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}
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/*
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* Read an ack from the device's boot-mode (polling)
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*
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* @i2400m:
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* @_ack: pointer to where to store the read data
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* @ack_size: how many bytes we should read
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*
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* Returns: < 0 errno code on error; otherwise, amount of received bytes.
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*
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* The ACK for a BM command is always at least sizeof(*ack) bytes, so
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* check for that. We don't need to check for device reboots
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*
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* NOTE: We do an artificial timeout of 1 sec over the SDIO timeout;
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* this way we have control over it...there is no way that I know
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* of setting an SDIO transaction timeout.
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*/
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ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
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struct i2400m_bootrom_header *ack,
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size_t ack_size)
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{
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int result;
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ssize_t rx_size;
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u64 timeout;
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struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
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struct sdio_func *func = i2400ms->func;
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struct device *dev = &func->dev;
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BUG_ON(sizeof(*ack) > ack_size);
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d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n",
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i2400m, ack, ack_size);
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timeout = get_jiffies_64() + 2 * HZ;
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sdio_claim_host(func);
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while (1) {
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if (time_after64(get_jiffies_64(), timeout)) {
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rx_size = -ETIMEDOUT;
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dev_err(dev, "timeout waiting for ack data\n");
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goto error_timedout;
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}
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/* Find the RX size, check if it fits or not -- it if
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* doesn't fit, fail, as we have no way to dispose of
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* the extra data. */
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rx_size = __i2400ms_rx_get_size(i2400ms);
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if (rx_size < 0)
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goto error_rx_get_size;
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result = -ENOSPC; /* Check it fits */
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if (rx_size < sizeof(*ack)) {
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rx_size = -EIO;
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dev_err(dev, "HW BUG? received is too small (%zu vs "
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"%zu needed)\n", sizeof(*ack), rx_size);
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goto error_too_small;
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}
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if (rx_size > I2400M_BM_ACK_BUF_SIZE) {
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dev_err(dev, "SW BUG? BM_ACK_BUF is too small (%u vs "
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"%zu needed)\n", I2400M_BM_ACK_BUF_SIZE,
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rx_size);
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goto error_too_small;
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}
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/* Read it */
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result = sdio_memcpy_fromio(func, i2400m->bm_ack_buf,
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I2400MS_DATA_ADDR, rx_size);
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if (result == -ETIMEDOUT || result == -ETIME)
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continue;
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if (result < 0) {
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dev_err(dev, "BM SDIO receive (%zu B) failed: %d\n",
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rx_size, result);
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goto error_read;
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} else
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break;
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}
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rx_size = min((ssize_t)ack_size, rx_size);
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memcpy(ack, i2400m->bm_ack_buf, rx_size);
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error_read:
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error_too_small:
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error_rx_get_size:
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error_timedout:
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sdio_release_host(func);
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d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %ld\n",
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i2400m, ack, ack_size, (long) rx_size);
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return rx_size;
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}
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