1454 lines
32 KiB
C
1454 lines
32 KiB
C
/*
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* linux/drivers/net/wireless/libertas/if_sdio.c
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*
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* Copyright 2007-2008 Pierre Ossman
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*
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* Inspired by if_cs.c, Copyright 2007 Holger Schurig
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* This hardware has more or less no CMD53 support, so all registers
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* must be accessed using sdio_readb()/sdio_writeb().
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*
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* Transfers must be in one transaction or the firmware goes bonkers.
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* This means that the transfer must either be small enough to do a
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* byte based transfer or it must be padded to a multiple of the
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* current block size.
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*
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* As SDIO is still new to the kernel, it is unfortunately common with
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* bugs in the host controllers related to that. One such bug is that
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* controllers cannot do transfers that aren't a multiple of 4 bytes.
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* If you don't have time to fix the host controller driver, you can
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* work around the problem by modifying if_sdio_host_to_card() and
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* if_sdio_card_to_host() to pad the data.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/firmware.h>
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#include <linux/netdevice.h>
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#include <linux/delay.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio_ids.h>
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#include <linux/mmc/sdio.h>
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#include <linux/mmc/host.h>
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#include <linux/pm_runtime.h>
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#include "host.h"
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#include "decl.h"
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#include "defs.h"
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#include "dev.h"
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#include "cmd.h"
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#include "if_sdio.h"
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static void if_sdio_interrupt(struct sdio_func *func);
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/* The if_sdio_remove() callback function is called when
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* user removes this module from kernel space or ejects
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* the card from the slot. The driver handles these 2 cases
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* differently for SD8688 combo chip.
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* If the user is removing the module, the FUNC_SHUTDOWN
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* command for SD8688 is sent to the firmware.
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* If the card is removed, there is no need to send this command.
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*
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* The variable 'user_rmmod' is used to distinguish these two
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* scenarios. This flag is initialized as FALSE in case the card
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* is removed, and will be set to TRUE for module removal when
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* module_exit function is called.
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*/
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static u8 user_rmmod;
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static const struct sdio_device_id if_sdio_ids[] = {
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{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
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SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
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{ SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
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SDIO_DEVICE_ID_MARVELL_8688WLAN) },
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{ /* end: all zeroes */ },
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};
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MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
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#define MODEL_8385 0x04
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#define MODEL_8686 0x0b
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#define MODEL_8688 0x10
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static const struct lbs_fw_table fw_table[] = {
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{ MODEL_8385, "libertas/sd8385_helper.bin", "libertas/sd8385.bin" },
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{ MODEL_8385, "sd8385_helper.bin", "sd8385.bin" },
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{ MODEL_8686, "libertas/sd8686_v9_helper.bin", "libertas/sd8686_v9.bin" },
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{ MODEL_8686, "libertas/sd8686_v8_helper.bin", "libertas/sd8686_v8.bin" },
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{ MODEL_8686, "sd8686_helper.bin", "sd8686.bin" },
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{ MODEL_8688, "libertas/sd8688_helper.bin", "libertas/sd8688.bin" },
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{ MODEL_8688, "sd8688_helper.bin", "sd8688.bin" },
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{ 0, NULL, NULL }
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};
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MODULE_FIRMWARE("libertas/sd8385_helper.bin");
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MODULE_FIRMWARE("libertas/sd8385.bin");
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MODULE_FIRMWARE("sd8385_helper.bin");
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MODULE_FIRMWARE("sd8385.bin");
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MODULE_FIRMWARE("libertas/sd8686_v9_helper.bin");
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MODULE_FIRMWARE("libertas/sd8686_v9.bin");
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MODULE_FIRMWARE("libertas/sd8686_v8_helper.bin");
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MODULE_FIRMWARE("libertas/sd8686_v8.bin");
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MODULE_FIRMWARE("sd8686_helper.bin");
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MODULE_FIRMWARE("sd8686.bin");
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MODULE_FIRMWARE("libertas/sd8688_helper.bin");
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MODULE_FIRMWARE("libertas/sd8688.bin");
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MODULE_FIRMWARE("sd8688_helper.bin");
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MODULE_FIRMWARE("sd8688.bin");
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struct if_sdio_packet {
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struct if_sdio_packet *next;
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u16 nb;
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u8 buffer[0] __attribute__((aligned(4)));
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};
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struct if_sdio_card {
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struct sdio_func *func;
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struct lbs_private *priv;
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int model;
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unsigned long ioport;
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unsigned int scratch_reg;
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bool started;
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wait_queue_head_t pwron_waitq;
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u8 buffer[65536] __attribute__((aligned(4)));
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spinlock_t lock;
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struct if_sdio_packet *packets;
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struct workqueue_struct *workqueue;
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struct work_struct packet_worker;
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u8 rx_unit;
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};
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static void if_sdio_finish_power_on(struct if_sdio_card *card);
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static int if_sdio_power_off(struct if_sdio_card *card);
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/********************************************************************/
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/* I/O */
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/********************************************************************/
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/*
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* For SD8385/SD8686, this function reads firmware status after
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* the image is downloaded, or reads RX packet length when
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* interrupt (with IF_SDIO_H_INT_UPLD bit set) is received.
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* For SD8688, this function reads firmware status only.
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*/
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static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
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{
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int ret;
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u16 scratch;
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scratch = sdio_readb(card->func, card->scratch_reg, &ret);
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if (!ret)
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scratch |= sdio_readb(card->func, card->scratch_reg + 1,
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&ret) << 8;
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if (err)
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*err = ret;
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if (ret)
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return 0xffff;
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return scratch;
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}
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static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
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{
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int ret;
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u8 rx_unit;
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rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
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if (ret)
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rx_unit = 0;
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return rx_unit;
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}
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static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
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{
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int ret;
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u16 rx_len;
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switch (card->model) {
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case MODEL_8385:
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case MODEL_8686:
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rx_len = if_sdio_read_scratch(card, &ret);
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break;
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case MODEL_8688:
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default: /* for newer chipsets */
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rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
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if (!ret)
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rx_len <<= card->rx_unit;
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else
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rx_len = 0xffff; /* invalid length */
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break;
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}
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if (err)
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*err = ret;
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return rx_len;
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}
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static int if_sdio_handle_cmd(struct if_sdio_card *card,
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u8 *buffer, unsigned size)
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{
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struct lbs_private *priv = card->priv;
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int ret;
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unsigned long flags;
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u8 i;
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lbs_deb_enter(LBS_DEB_SDIO);
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if (size > LBS_CMD_BUFFER_SIZE) {
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lbs_deb_sdio("response packet too large (%d bytes)\n",
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(int)size);
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ret = -E2BIG;
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goto out;
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}
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spin_lock_irqsave(&priv->driver_lock, flags);
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i = (priv->resp_idx == 0) ? 1 : 0;
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BUG_ON(priv->resp_len[i]);
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priv->resp_len[i] = size;
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memcpy(priv->resp_buf[i], buffer, size);
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lbs_notify_command_response(priv, i);
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spin_unlock_irqrestore(&card->priv->driver_lock, flags);
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ret = 0;
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out:
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lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
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return ret;
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}
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static int if_sdio_handle_data(struct if_sdio_card *card,
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u8 *buffer, unsigned size)
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{
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int ret;
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struct sk_buff *skb;
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char *data;
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lbs_deb_enter(LBS_DEB_SDIO);
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if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
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lbs_deb_sdio("response packet too large (%d bytes)\n",
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(int)size);
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ret = -E2BIG;
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goto out;
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}
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skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
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if (!skb) {
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ret = -ENOMEM;
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goto out;
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}
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skb_reserve(skb, NET_IP_ALIGN);
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data = skb_put(skb, size);
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memcpy(data, buffer, size);
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lbs_process_rxed_packet(card->priv, skb);
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ret = 0;
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out:
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lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
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return ret;
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}
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static int if_sdio_handle_event(struct if_sdio_card *card,
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u8 *buffer, unsigned size)
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{
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int ret;
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u32 event;
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lbs_deb_enter(LBS_DEB_SDIO);
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if (card->model == MODEL_8385) {
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event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
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if (ret)
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goto out;
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/* right shift 3 bits to get the event id */
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event >>= 3;
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} else {
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if (size < 4) {
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lbs_deb_sdio("event packet too small (%d bytes)\n",
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(int)size);
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ret = -EINVAL;
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goto out;
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}
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event = buffer[3] << 24;
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event |= buffer[2] << 16;
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event |= buffer[1] << 8;
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event |= buffer[0] << 0;
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}
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lbs_queue_event(card->priv, event & 0xFF);
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ret = 0;
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out:
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lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
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return ret;
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}
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static int if_sdio_wait_status(struct if_sdio_card *card, const u8 condition)
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{
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u8 status;
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unsigned long timeout;
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int ret = 0;
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timeout = jiffies + HZ;
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while (1) {
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status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
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if (ret)
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return ret;
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if ((status & condition) == condition)
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break;
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if (time_after(jiffies, timeout))
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return -ETIMEDOUT;
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mdelay(1);
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}
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return ret;
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}
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static int if_sdio_card_to_host(struct if_sdio_card *card)
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{
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int ret;
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u16 size, type, chunk;
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lbs_deb_enter(LBS_DEB_SDIO);
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size = if_sdio_read_rx_len(card, &ret);
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if (ret)
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goto out;
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if (size < 4) {
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lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
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(int)size);
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ret = -EINVAL;
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goto out;
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}
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ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
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if (ret)
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goto out;
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/*
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* The transfer must be in one transaction or the firmware
|
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* goes suicidal. There's no way to guarantee that for all
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* controllers, but we can at least try.
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*/
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chunk = sdio_align_size(card->func, size);
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ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
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if (ret)
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goto out;
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chunk = card->buffer[0] | (card->buffer[1] << 8);
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type = card->buffer[2] | (card->buffer[3] << 8);
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lbs_deb_sdio("packet of type %d and size %d bytes\n",
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(int)type, (int)chunk);
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if (chunk > size) {
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lbs_deb_sdio("packet fragment (%d > %d)\n",
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(int)chunk, (int)size);
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ret = -EINVAL;
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goto out;
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}
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if (chunk < size) {
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lbs_deb_sdio("packet fragment (%d < %d)\n",
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(int)chunk, (int)size);
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}
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switch (type) {
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case MVMS_CMD:
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ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
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if (ret)
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goto out;
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break;
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case MVMS_DAT:
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ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
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if (ret)
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goto out;
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break;
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case MVMS_EVENT:
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ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
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if (ret)
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goto out;
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break;
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default:
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lbs_deb_sdio("invalid type (%d) from firmware\n",
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(int)type);
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ret = -EINVAL;
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goto out;
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}
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out:
|
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if (ret)
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pr_err("problem fetching packet from firmware\n");
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|
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lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
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|
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return ret;
|
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}
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|
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static void if_sdio_host_to_card_worker(struct work_struct *work)
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{
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struct if_sdio_card *card;
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struct if_sdio_packet *packet;
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int ret;
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unsigned long flags;
|
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|
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lbs_deb_enter(LBS_DEB_SDIO);
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card = container_of(work, struct if_sdio_card, packet_worker);
|
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|
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while (1) {
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spin_lock_irqsave(&card->lock, flags);
|
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packet = card->packets;
|
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if (packet)
|
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card->packets = packet->next;
|
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spin_unlock_irqrestore(&card->lock, flags);
|
|
|
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if (!packet)
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break;
|
|
|
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sdio_claim_host(card->func);
|
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|
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ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
|
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if (ret == 0) {
|
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ret = sdio_writesb(card->func, card->ioport,
|
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packet->buffer, packet->nb);
|
|
}
|
|
|
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if (ret)
|
|
pr_err("error %d sending packet to firmware\n", ret);
|
|
|
|
sdio_release_host(card->func);
|
|
|
|
kfree(packet);
|
|
}
|
|
|
|
lbs_deb_leave(LBS_DEB_SDIO);
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* Firmware */
|
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/********************************************************************/
|
|
|
|
#define FW_DL_READY_STATUS (IF_SDIO_IO_RDY | IF_SDIO_DL_RDY)
|
|
|
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static int if_sdio_prog_helper(struct if_sdio_card *card,
|
|
const struct firmware *fw)
|
|
{
|
|
int ret;
|
|
unsigned long timeout;
|
|
u8 *chunk_buffer;
|
|
u32 chunk_size;
|
|
const u8 *firmware;
|
|
size_t size;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
chunk_buffer = kzalloc(64, GFP_KERNEL);
|
|
if (!chunk_buffer) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
sdio_claim_host(card->func);
|
|
|
|
ret = sdio_set_block_size(card->func, 32);
|
|
if (ret)
|
|
goto release;
|
|
|
|
firmware = fw->data;
|
|
size = fw->size;
|
|
|
|
while (size) {
|
|
ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
|
|
if (ret)
|
|
goto release;
|
|
|
|
/* On some platforms (like Davinci) the chip needs more time
|
|
* between helper blocks.
|
|
*/
|
|
mdelay(2);
|
|
|
|
chunk_size = min(size, (size_t)60);
|
|
|
|
*((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
|
|
memcpy(chunk_buffer + 4, firmware, chunk_size);
|
|
/*
|
|
lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
|
|
*/
|
|
ret = sdio_writesb(card->func, card->ioport,
|
|
chunk_buffer, 64);
|
|
if (ret)
|
|
goto release;
|
|
|
|
firmware += chunk_size;
|
|
size -= chunk_size;
|
|
}
|
|
|
|
/* an empty block marks the end of the transfer */
|
|
memset(chunk_buffer, 0, 4);
|
|
ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
|
|
if (ret)
|
|
goto release;
|
|
|
|
lbs_deb_sdio("waiting for helper to boot...\n");
|
|
|
|
/* wait for the helper to boot by looking at the size register */
|
|
timeout = jiffies + HZ;
|
|
while (1) {
|
|
u16 req_size;
|
|
|
|
req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
|
|
if (ret)
|
|
goto release;
|
|
|
|
req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
|
|
if (ret)
|
|
goto release;
|
|
|
|
if (req_size != 0)
|
|
break;
|
|
|
|
if (time_after(jiffies, timeout)) {
|
|
ret = -ETIMEDOUT;
|
|
goto release;
|
|
}
|
|
|
|
msleep(10);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
release:
|
|
sdio_release_host(card->func);
|
|
kfree(chunk_buffer);
|
|
|
|
out:
|
|
if (ret)
|
|
pr_err("failed to load helper firmware\n");
|
|
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_prog_real(struct if_sdio_card *card,
|
|
const struct firmware *fw)
|
|
{
|
|
int ret;
|
|
unsigned long timeout;
|
|
u8 *chunk_buffer;
|
|
u32 chunk_size;
|
|
const u8 *firmware;
|
|
size_t size, req_size;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
chunk_buffer = kzalloc(512, GFP_KERNEL);
|
|
if (!chunk_buffer) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
sdio_claim_host(card->func);
|
|
|
|
ret = sdio_set_block_size(card->func, 32);
|
|
if (ret)
|
|
goto release;
|
|
|
|
firmware = fw->data;
|
|
size = fw->size;
|
|
|
|
while (size) {
|
|
timeout = jiffies + HZ;
|
|
while (1) {
|
|
ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
|
|
if (ret)
|
|
goto release;
|
|
|
|
req_size = sdio_readb(card->func, IF_SDIO_RD_BASE,
|
|
&ret);
|
|
if (ret)
|
|
goto release;
|
|
|
|
req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1,
|
|
&ret) << 8;
|
|
if (ret)
|
|
goto release;
|
|
|
|
/*
|
|
* For SD8688 wait until the length is not 0, 1 or 2
|
|
* before downloading the first FW block,
|
|
* since BOOT code writes the register to indicate the
|
|
* helper/FW download winner,
|
|
* the value could be 1 or 2 (Func1 or Func2).
|
|
*/
|
|
if ((size != fw->size) || (req_size > 2))
|
|
break;
|
|
if (time_after(jiffies, timeout)) {
|
|
ret = -ETIMEDOUT;
|
|
goto release;
|
|
}
|
|
mdelay(1);
|
|
}
|
|
|
|
/*
|
|
lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
|
|
*/
|
|
if (req_size == 0) {
|
|
lbs_deb_sdio("firmware helper gave up early\n");
|
|
ret = -EIO;
|
|
goto release;
|
|
}
|
|
|
|
if (req_size & 0x01) {
|
|
lbs_deb_sdio("firmware helper signalled error\n");
|
|
ret = -EIO;
|
|
goto release;
|
|
}
|
|
|
|
if (req_size > size)
|
|
req_size = size;
|
|
|
|
while (req_size) {
|
|
chunk_size = min(req_size, (size_t)512);
|
|
|
|
memcpy(chunk_buffer, firmware, chunk_size);
|
|
/*
|
|
lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
|
|
chunk_size, (chunk_size + 31) / 32 * 32);
|
|
*/
|
|
ret = sdio_writesb(card->func, card->ioport,
|
|
chunk_buffer, roundup(chunk_size, 32));
|
|
if (ret)
|
|
goto release;
|
|
|
|
firmware += chunk_size;
|
|
size -= chunk_size;
|
|
req_size -= chunk_size;
|
|
}
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
lbs_deb_sdio("waiting for firmware to boot...\n");
|
|
|
|
/* wait for the firmware to boot */
|
|
timeout = jiffies + HZ;
|
|
while (1) {
|
|
u16 scratch;
|
|
|
|
scratch = if_sdio_read_scratch(card, &ret);
|
|
if (ret)
|
|
goto release;
|
|
|
|
if (scratch == IF_SDIO_FIRMWARE_OK)
|
|
break;
|
|
|
|
if (time_after(jiffies, timeout)) {
|
|
ret = -ETIMEDOUT;
|
|
goto release;
|
|
}
|
|
|
|
msleep(10);
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
release:
|
|
sdio_release_host(card->func);
|
|
kfree(chunk_buffer);
|
|
|
|
out:
|
|
if (ret)
|
|
pr_err("failed to load firmware\n");
|
|
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
static void if_sdio_do_prog_firmware(struct lbs_private *priv, int ret,
|
|
const struct firmware *helper,
|
|
const struct firmware *mainfw)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
|
|
if (ret) {
|
|
pr_err("failed to find firmware (%d)\n", ret);
|
|
return;
|
|
}
|
|
|
|
ret = if_sdio_prog_helper(card, helper);
|
|
if (ret)
|
|
return;
|
|
|
|
lbs_deb_sdio("Helper firmware loaded\n");
|
|
|
|
ret = if_sdio_prog_real(card, mainfw);
|
|
if (ret)
|
|
return;
|
|
|
|
lbs_deb_sdio("Firmware loaded\n");
|
|
if_sdio_finish_power_on(card);
|
|
}
|
|
|
|
static int if_sdio_prog_firmware(struct if_sdio_card *card)
|
|
{
|
|
int ret;
|
|
u16 scratch;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
/*
|
|
* Disable interrupts
|
|
*/
|
|
sdio_claim_host(card->func);
|
|
sdio_writeb(card->func, 0x00, IF_SDIO_H_INT_MASK, &ret);
|
|
sdio_release_host(card->func);
|
|
|
|
sdio_claim_host(card->func);
|
|
scratch = if_sdio_read_scratch(card, &ret);
|
|
sdio_release_host(card->func);
|
|
|
|
lbs_deb_sdio("firmware status = %#x\n", scratch);
|
|
lbs_deb_sdio("scratch ret = %d\n", ret);
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
|
|
/*
|
|
* The manual clearly describes that FEDC is the right code to use
|
|
* to detect firmware presence, but for SD8686 it is not that simple.
|
|
* Scratch is also used to store the RX packet length, so we lose
|
|
* the FEDC value early on. So we use a non-zero check in order
|
|
* to validate firmware presence.
|
|
* Additionally, the SD8686 in the Gumstix always has the high scratch
|
|
* bit set, even when the firmware is not loaded. So we have to
|
|
* exclude that from the test.
|
|
*/
|
|
if (scratch == IF_SDIO_FIRMWARE_OK) {
|
|
lbs_deb_sdio("firmware already loaded\n");
|
|
if_sdio_finish_power_on(card);
|
|
return 0;
|
|
} else if ((card->model == MODEL_8686) && (scratch & 0x7fff)) {
|
|
lbs_deb_sdio("firmware may be running\n");
|
|
if_sdio_finish_power_on(card);
|
|
return 0;
|
|
}
|
|
|
|
ret = lbs_get_firmware_async(card->priv, &card->func->dev, card->model,
|
|
fw_table, if_sdio_do_prog_firmware);
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* Power management */
|
|
/********************************************************************/
|
|
|
|
/* Finish power on sequence (after firmware is loaded) */
|
|
static void if_sdio_finish_power_on(struct if_sdio_card *card)
|
|
{
|
|
struct sdio_func *func = card->func;
|
|
struct lbs_private *priv = card->priv;
|
|
int ret;
|
|
|
|
sdio_claim_host(func);
|
|
sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
|
|
|
|
/*
|
|
* Get rx_unit if the chip is SD8688 or newer.
|
|
* SD8385 & SD8686 do not have rx_unit.
|
|
*/
|
|
if ((card->model != MODEL_8385)
|
|
&& (card->model != MODEL_8686))
|
|
card->rx_unit = if_sdio_read_rx_unit(card);
|
|
else
|
|
card->rx_unit = 0;
|
|
|
|
/*
|
|
* Set up the interrupt handler late.
|
|
*
|
|
* If we set it up earlier, the (buggy) hardware generates a spurious
|
|
* interrupt, even before the interrupt has been enabled, with
|
|
* CCCR_INTx = 0.
|
|
*
|
|
* We register the interrupt handler late so that we can handle any
|
|
* spurious interrupts, and also to avoid generation of that known
|
|
* spurious interrupt in the first place.
|
|
*/
|
|
ret = sdio_claim_irq(func, if_sdio_interrupt);
|
|
if (ret)
|
|
goto release;
|
|
|
|
/*
|
|
* Enable interrupts now that everything is set up
|
|
*/
|
|
sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
|
|
if (ret)
|
|
goto release_irq;
|
|
|
|
sdio_release_host(func);
|
|
|
|
/* Set fw_ready before queuing any commands so that
|
|
* lbs_thread won't block from sending them to firmware.
|
|
*/
|
|
priv->fw_ready = 1;
|
|
|
|
/*
|
|
* FUNC_INIT is required for SD8688 WLAN/BT multiple functions
|
|
*/
|
|
if (card->model == MODEL_8688) {
|
|
struct cmd_header cmd;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
lbs_deb_sdio("send function INIT command\n");
|
|
if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
|
|
lbs_cmd_copyback, (unsigned long) &cmd))
|
|
netdev_alert(priv->dev, "CMD_FUNC_INIT cmd failed\n");
|
|
}
|
|
|
|
wake_up(&card->pwron_waitq);
|
|
|
|
if (!card->started) {
|
|
ret = lbs_start_card(priv);
|
|
if_sdio_power_off(card);
|
|
if (ret == 0) {
|
|
card->started = true;
|
|
/* Tell PM core that we don't need the card to be
|
|
* powered now */
|
|
pm_runtime_put(&func->dev);
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
release_irq:
|
|
sdio_release_irq(func);
|
|
release:
|
|
sdio_release_host(func);
|
|
}
|
|
|
|
static int if_sdio_power_on(struct if_sdio_card *card)
|
|
{
|
|
struct sdio_func *func = card->func;
|
|
struct mmc_host *host = func->card->host;
|
|
int ret;
|
|
|
|
sdio_claim_host(func);
|
|
|
|
ret = sdio_enable_func(func);
|
|
if (ret)
|
|
goto release;
|
|
|
|
/* For 1-bit transfers to the 8686 model, we need to enable the
|
|
* interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
|
|
* bit to allow access to non-vendor registers. */
|
|
if ((card->model == MODEL_8686) &&
|
|
(host->caps & MMC_CAP_SDIO_IRQ) &&
|
|
(host->ios.bus_width == MMC_BUS_WIDTH_1)) {
|
|
u8 reg;
|
|
|
|
func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
|
|
reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
|
|
if (ret)
|
|
goto disable;
|
|
|
|
reg |= SDIO_BUS_ECSI;
|
|
sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
|
|
if (ret)
|
|
goto disable;
|
|
}
|
|
|
|
card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
|
|
if (ret)
|
|
goto disable;
|
|
|
|
card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
|
|
if (ret)
|
|
goto disable;
|
|
|
|
card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
|
|
if (ret)
|
|
goto disable;
|
|
|
|
sdio_release_host(func);
|
|
ret = if_sdio_prog_firmware(card);
|
|
if (ret) {
|
|
sdio_claim_host(func);
|
|
goto disable;
|
|
}
|
|
|
|
return 0;
|
|
|
|
disable:
|
|
sdio_disable_func(func);
|
|
release:
|
|
sdio_release_host(func);
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_power_off(struct if_sdio_card *card)
|
|
{
|
|
struct sdio_func *func = card->func;
|
|
struct lbs_private *priv = card->priv;
|
|
|
|
priv->fw_ready = 0;
|
|
|
|
sdio_claim_host(func);
|
|
sdio_release_irq(func);
|
|
sdio_disable_func(func);
|
|
sdio_release_host(func);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*******************************************************************/
|
|
/* Libertas callbacks */
|
|
/*******************************************************************/
|
|
|
|
static int if_sdio_host_to_card(struct lbs_private *priv,
|
|
u8 type, u8 *buf, u16 nb)
|
|
{
|
|
int ret;
|
|
struct if_sdio_card *card;
|
|
struct if_sdio_packet *packet, *cur;
|
|
u16 size;
|
|
unsigned long flags;
|
|
|
|
lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
|
|
|
|
card = priv->card;
|
|
|
|
if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The transfer must be in one transaction or the firmware
|
|
* goes suicidal. There's no way to guarantee that for all
|
|
* controllers, but we can at least try.
|
|
*/
|
|
size = sdio_align_size(card->func, nb + 4);
|
|
|
|
packet = kzalloc(sizeof(struct if_sdio_packet) + size,
|
|
GFP_ATOMIC);
|
|
if (!packet) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
packet->next = NULL;
|
|
packet->nb = size;
|
|
|
|
/*
|
|
* SDIO specific header.
|
|
*/
|
|
packet->buffer[0] = (nb + 4) & 0xff;
|
|
packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
|
|
packet->buffer[2] = type;
|
|
packet->buffer[3] = 0;
|
|
|
|
memcpy(packet->buffer + 4, buf, nb);
|
|
|
|
spin_lock_irqsave(&card->lock, flags);
|
|
|
|
if (!card->packets)
|
|
card->packets = packet;
|
|
else {
|
|
cur = card->packets;
|
|
while (cur->next)
|
|
cur = cur->next;
|
|
cur->next = packet;
|
|
}
|
|
|
|
switch (type) {
|
|
case MVMS_CMD:
|
|
priv->dnld_sent = DNLD_CMD_SENT;
|
|
break;
|
|
case MVMS_DAT:
|
|
priv->dnld_sent = DNLD_DATA_SENT;
|
|
break;
|
|
default:
|
|
lbs_deb_sdio("unknown packet type %d\n", (int)type);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&card->lock, flags);
|
|
|
|
queue_work(card->workqueue, &card->packet_worker);
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
|
|
{
|
|
int ret = -1;
|
|
struct cmd_header cmd;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
lbs_deb_sdio("send DEEP_SLEEP command\n");
|
|
ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
|
|
lbs_cmd_copyback, (unsigned long) &cmd);
|
|
if (ret)
|
|
netdev_err(priv->dev, "DEEP_SLEEP cmd failed\n");
|
|
|
|
mdelay(200);
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
int ret = -1;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
sdio_claim_host(card->func);
|
|
|
|
sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
|
|
if (ret)
|
|
netdev_err(priv->dev, "sdio_writeb failed!\n");
|
|
|
|
sdio_release_host(card->func);
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
int ret = -1;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
sdio_claim_host(card->func);
|
|
|
|
sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
|
|
if (ret)
|
|
netdev_err(priv->dev, "sdio_writeb failed!\n");
|
|
|
|
sdio_release_host(card->func);
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
return ret;
|
|
|
|
}
|
|
|
|
static struct mmc_host *reset_host;
|
|
|
|
static void if_sdio_reset_card_worker(struct work_struct *work)
|
|
{
|
|
/*
|
|
* The actual reset operation must be run outside of lbs_thread. This
|
|
* is because mmc_remove_host() will cause the device to be instantly
|
|
* destroyed, and the libertas driver then needs to end lbs_thread,
|
|
* leading to a deadlock.
|
|
*
|
|
* We run it in a workqueue totally independent from the if_sdio_card
|
|
* instance for that reason.
|
|
*/
|
|
|
|
pr_info("Resetting card...");
|
|
mmc_remove_host(reset_host);
|
|
mmc_add_host(reset_host);
|
|
}
|
|
static DECLARE_WORK(card_reset_work, if_sdio_reset_card_worker);
|
|
|
|
static void if_sdio_reset_card(struct lbs_private *priv)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
|
|
if (work_pending(&card_reset_work))
|
|
return;
|
|
|
|
reset_host = card->func->card->host;
|
|
schedule_work(&card_reset_work);
|
|
}
|
|
|
|
static int if_sdio_power_save(struct lbs_private *priv)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
int ret;
|
|
|
|
flush_workqueue(card->workqueue);
|
|
|
|
ret = if_sdio_power_off(card);
|
|
|
|
/* Let runtime PM know the card is powered off */
|
|
pm_runtime_put_sync(&card->func->dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int if_sdio_power_restore(struct lbs_private *priv)
|
|
{
|
|
struct if_sdio_card *card = priv->card;
|
|
int r;
|
|
|
|
/* Make sure the card will not be powered off by runtime PM */
|
|
pm_runtime_get_sync(&card->func->dev);
|
|
|
|
r = if_sdio_power_on(card);
|
|
if (r)
|
|
return r;
|
|
|
|
wait_event(card->pwron_waitq, priv->fw_ready);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*******************************************************************/
|
|
/* SDIO callbacks */
|
|
/*******************************************************************/
|
|
|
|
static void if_sdio_interrupt(struct sdio_func *func)
|
|
{
|
|
int ret;
|
|
struct if_sdio_card *card;
|
|
u8 cause;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
card = sdio_get_drvdata(func);
|
|
|
|
cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
|
|
if (ret || !cause)
|
|
goto out;
|
|
|
|
lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
|
|
|
|
sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/*
|
|
* Ignore the define name, this really means the card has
|
|
* successfully received the command.
|
|
*/
|
|
card->priv->is_activity_detected = 1;
|
|
if (cause & IF_SDIO_H_INT_DNLD)
|
|
lbs_host_to_card_done(card->priv);
|
|
|
|
|
|
if (cause & IF_SDIO_H_INT_UPLD) {
|
|
ret = if_sdio_card_to_host(card);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
ret = 0;
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
}
|
|
|
|
static int if_sdio_probe(struct sdio_func *func,
|
|
const struct sdio_device_id *id)
|
|
{
|
|
struct if_sdio_card *card;
|
|
struct lbs_private *priv;
|
|
int ret, i;
|
|
unsigned int model;
|
|
struct if_sdio_packet *packet;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
for (i = 0;i < func->card->num_info;i++) {
|
|
if (sscanf(func->card->info[i],
|
|
"802.11 SDIO ID: %x", &model) == 1)
|
|
break;
|
|
if (sscanf(func->card->info[i],
|
|
"ID: %x", &model) == 1)
|
|
break;
|
|
if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
|
|
model = MODEL_8385;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == func->card->num_info) {
|
|
pr_err("unable to identify card model\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
|
|
if (!card)
|
|
return -ENOMEM;
|
|
|
|
card->func = func;
|
|
card->model = model;
|
|
|
|
switch (card->model) {
|
|
case MODEL_8385:
|
|
card->scratch_reg = IF_SDIO_SCRATCH_OLD;
|
|
break;
|
|
case MODEL_8686:
|
|
card->scratch_reg = IF_SDIO_SCRATCH;
|
|
break;
|
|
case MODEL_8688:
|
|
default: /* for newer chipsets */
|
|
card->scratch_reg = IF_SDIO_FW_STATUS;
|
|
break;
|
|
}
|
|
|
|
spin_lock_init(&card->lock);
|
|
card->workqueue = create_workqueue("libertas_sdio");
|
|
INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
|
|
init_waitqueue_head(&card->pwron_waitq);
|
|
|
|
/* Check if we support this card */
|
|
for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
|
|
if (card->model == fw_table[i].model)
|
|
break;
|
|
}
|
|
if (i == ARRAY_SIZE(fw_table)) {
|
|
pr_err("unknown card model 0x%x\n", card->model);
|
|
ret = -ENODEV;
|
|
goto free;
|
|
}
|
|
|
|
sdio_set_drvdata(func, card);
|
|
|
|
lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
|
|
"device = 0x%X, model = 0x%X, ioport = 0x%X\n",
|
|
func->class, func->vendor, func->device,
|
|
model, (unsigned)card->ioport);
|
|
|
|
|
|
priv = lbs_add_card(card, &func->dev);
|
|
if (!priv) {
|
|
ret = -ENOMEM;
|
|
goto free;
|
|
}
|
|
|
|
card->priv = priv;
|
|
|
|
priv->card = card;
|
|
priv->hw_host_to_card = if_sdio_host_to_card;
|
|
priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
|
|
priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
|
|
priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
|
|
priv->reset_card = if_sdio_reset_card;
|
|
priv->power_save = if_sdio_power_save;
|
|
priv->power_restore = if_sdio_power_restore;
|
|
|
|
ret = if_sdio_power_on(card);
|
|
if (ret)
|
|
goto err_activate_card;
|
|
|
|
out:
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
|
|
return ret;
|
|
|
|
err_activate_card:
|
|
flush_workqueue(card->workqueue);
|
|
lbs_remove_card(priv);
|
|
free:
|
|
destroy_workqueue(card->workqueue);
|
|
while (card->packets) {
|
|
packet = card->packets;
|
|
card->packets = card->packets->next;
|
|
kfree(packet);
|
|
}
|
|
|
|
kfree(card);
|
|
|
|
goto out;
|
|
}
|
|
|
|
static void if_sdio_remove(struct sdio_func *func)
|
|
{
|
|
struct if_sdio_card *card;
|
|
struct if_sdio_packet *packet;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
card = sdio_get_drvdata(func);
|
|
|
|
/* Undo decrement done above in if_sdio_probe */
|
|
pm_runtime_get_noresume(&func->dev);
|
|
|
|
if (user_rmmod && (card->model == MODEL_8688)) {
|
|
/*
|
|
* FUNC_SHUTDOWN is required for SD8688 WLAN/BT
|
|
* multiple functions
|
|
*/
|
|
struct cmd_header cmd;
|
|
|
|
memset(&cmd, 0, sizeof(cmd));
|
|
|
|
lbs_deb_sdio("send function SHUTDOWN command\n");
|
|
if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
|
|
&cmd, sizeof(cmd), lbs_cmd_copyback,
|
|
(unsigned long) &cmd))
|
|
pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
|
|
}
|
|
|
|
|
|
lbs_deb_sdio("call remove card\n");
|
|
lbs_stop_card(card->priv);
|
|
lbs_remove_card(card->priv);
|
|
|
|
flush_workqueue(card->workqueue);
|
|
destroy_workqueue(card->workqueue);
|
|
|
|
while (card->packets) {
|
|
packet = card->packets;
|
|
card->packets = card->packets->next;
|
|
kfree(packet);
|
|
}
|
|
|
|
kfree(card);
|
|
lbs_deb_leave(LBS_DEB_SDIO);
|
|
}
|
|
|
|
static int if_sdio_suspend(struct device *dev)
|
|
{
|
|
struct sdio_func *func = dev_to_sdio_func(dev);
|
|
int ret;
|
|
struct if_sdio_card *card = sdio_get_drvdata(func);
|
|
|
|
mmc_pm_flag_t flags = sdio_get_host_pm_caps(func);
|
|
|
|
/* If we're powered off anyway, just let the mmc layer remove the
|
|
* card. */
|
|
if (!lbs_iface_active(card->priv))
|
|
return -ENOSYS;
|
|
|
|
dev_info(dev, "%s: suspend: PM flags = 0x%x\n",
|
|
sdio_func_id(func), flags);
|
|
|
|
/* If we aren't being asked to wake on anything, we should bail out
|
|
* and let the SD stack power down the card.
|
|
*/
|
|
if (card->priv->wol_criteria == EHS_REMOVE_WAKEUP) {
|
|
dev_info(dev, "Suspend without wake params -- powering down card\n");
|
|
return -ENOSYS;
|
|
}
|
|
|
|
if (!(flags & MMC_PM_KEEP_POWER)) {
|
|
dev_err(dev, "%s: cannot remain alive while host is suspended\n",
|
|
sdio_func_id(func));
|
|
return -ENOSYS;
|
|
}
|
|
|
|
ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = lbs_suspend(card->priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
|
|
}
|
|
|
|
static int if_sdio_resume(struct device *dev)
|
|
{
|
|
struct sdio_func *func = dev_to_sdio_func(dev);
|
|
struct if_sdio_card *card = sdio_get_drvdata(func);
|
|
int ret;
|
|
|
|
dev_info(dev, "%s: resume: we're back\n", sdio_func_id(func));
|
|
|
|
ret = lbs_resume(card->priv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct dev_pm_ops if_sdio_pm_ops = {
|
|
.suspend = if_sdio_suspend,
|
|
.resume = if_sdio_resume,
|
|
};
|
|
|
|
static struct sdio_driver if_sdio_driver = {
|
|
.name = "libertas_sdio",
|
|
.id_table = if_sdio_ids,
|
|
.probe = if_sdio_probe,
|
|
.remove = if_sdio_remove,
|
|
.drv = {
|
|
.pm = &if_sdio_pm_ops,
|
|
},
|
|
};
|
|
|
|
/*******************************************************************/
|
|
/* Module functions */
|
|
/*******************************************************************/
|
|
|
|
static int __init if_sdio_init_module(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
|
|
printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
|
|
|
|
ret = sdio_register_driver(&if_sdio_driver);
|
|
|
|
/* Clear the flag in case user removes the card. */
|
|
user_rmmod = 0;
|
|
|
|
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void __exit if_sdio_exit_module(void)
|
|
{
|
|
lbs_deb_enter(LBS_DEB_SDIO);
|
|
|
|
/* Set the flag as user is removing this module. */
|
|
user_rmmod = 1;
|
|
|
|
cancel_work_sync(&card_reset_work);
|
|
|
|
sdio_unregister_driver(&if_sdio_driver);
|
|
|
|
lbs_deb_leave(LBS_DEB_SDIO);
|
|
}
|
|
|
|
module_init(if_sdio_init_module);
|
|
module_exit(if_sdio_exit_module);
|
|
|
|
MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
|
|
MODULE_AUTHOR("Pierre Ossman");
|
|
MODULE_LICENSE("GPL");
|