diff options
Diffstat (limited to 'drivers/staging/wfx/bus_sdio.c')
| -rw-r--r-- | drivers/staging/wfx/bus_sdio.c | 272 |
1 files changed, 0 insertions, 272 deletions
diff --git a/drivers/staging/wfx/bus_sdio.c b/drivers/staging/wfx/bus_sdio.c deleted file mode 100644 index a670176ba06f..000000000000 --- a/drivers/staging/wfx/bus_sdio.c +++ /dev/null @@ -1,272 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * SDIO interface. - * - * Copyright (c) 2017-2020, Silicon Laboratories, Inc. - * Copyright (c) 2010, ST-Ericsson - */ -#include <linux/module.h> -#include <linux/mmc/sdio.h> -#include <linux/mmc/sdio_func.h> -#include <linux/mmc/card.h> -#include <linux/interrupt.h> -#include <linux/of_irq.h> -#include <linux/irq.h> - -#include "bus.h" -#include "wfx.h" -#include "hwio.h" -#include "main.h" -#include "bh.h" - -static const struct wfx_platform_data wfx_sdio_pdata = { - .file_fw = "wfm_wf200", - .file_pds = "wf200.pds", -}; - -struct wfx_sdio_priv { - struct sdio_func *func; - struct wfx_dev *core; - u8 buf_id_tx; - u8 buf_id_rx; - int of_irq; -}; - -static int wfx_sdio_copy_from_io(void *priv, unsigned int reg_id, - void *dst, size_t count) -{ - struct wfx_sdio_priv *bus = priv; - unsigned int sdio_addr = reg_id << 2; - int ret; - - WARN(reg_id > 7, "chip only has 7 registers"); - WARN(((uintptr_t)dst) & 3, "unaligned buffer size"); - WARN(count & 3, "unaligned buffer address"); - - /* Use queue mode buffers */ - if (reg_id == WFX_REG_IN_OUT_QUEUE) - sdio_addr |= (bus->buf_id_rx + 1) << 7; - ret = sdio_memcpy_fromio(bus->func, dst, sdio_addr, count); - if (!ret && reg_id == WFX_REG_IN_OUT_QUEUE) - bus->buf_id_rx = (bus->buf_id_rx + 1) % 4; - - return ret; -} - -static int wfx_sdio_copy_to_io(void *priv, unsigned int reg_id, - const void *src, size_t count) -{ - struct wfx_sdio_priv *bus = priv; - unsigned int sdio_addr = reg_id << 2; - int ret; - - WARN(reg_id > 7, "chip only has 7 registers"); - WARN(((uintptr_t)src) & 3, "unaligned buffer size"); - WARN(count & 3, "unaligned buffer address"); - - /* Use queue mode buffers */ - if (reg_id == WFX_REG_IN_OUT_QUEUE) - sdio_addr |= bus->buf_id_tx << 7; - /* FIXME: discards 'const' qualifier for src */ - ret = sdio_memcpy_toio(bus->func, sdio_addr, (void *)src, count); - if (!ret && reg_id == WFX_REG_IN_OUT_QUEUE) - bus->buf_id_tx = (bus->buf_id_tx + 1) % 32; - - return ret; -} - -static void wfx_sdio_lock(void *priv) -{ - struct wfx_sdio_priv *bus = priv; - - sdio_claim_host(bus->func); -} - -static void wfx_sdio_unlock(void *priv) -{ - struct wfx_sdio_priv *bus = priv; - - sdio_release_host(bus->func); -} - -static void wfx_sdio_irq_handler(struct sdio_func *func) -{ - struct wfx_sdio_priv *bus = sdio_get_drvdata(func); - - wfx_bh_request_rx(bus->core); -} - -static irqreturn_t wfx_sdio_irq_handler_ext(int irq, void *priv) -{ - struct wfx_sdio_priv *bus = priv; - - sdio_claim_host(bus->func); - wfx_bh_request_rx(bus->core); - sdio_release_host(bus->func); - return IRQ_HANDLED; -} - -static int wfx_sdio_irq_subscribe(void *priv) -{ - struct wfx_sdio_priv *bus = priv; - u32 flags; - int ret; - u8 cccr; - - if (!bus->of_irq) { - sdio_claim_host(bus->func); - ret = sdio_claim_irq(bus->func, wfx_sdio_irq_handler); - sdio_release_host(bus->func); - return ret; - } - - flags = irq_get_trigger_type(bus->of_irq); - if (!flags) - flags = IRQF_TRIGGER_HIGH; - flags |= IRQF_ONESHOT; - ret = devm_request_threaded_irq(&bus->func->dev, bus->of_irq, NULL, - wfx_sdio_irq_handler_ext, flags, - "wfx", bus); - if (ret) - return ret; - sdio_claim_host(bus->func); - cccr = sdio_f0_readb(bus->func, SDIO_CCCR_IENx, NULL); - cccr |= BIT(0); - cccr |= BIT(bus->func->num); - sdio_f0_writeb(bus->func, cccr, SDIO_CCCR_IENx, NULL); - sdio_release_host(bus->func); - return 0; -} - -static int wfx_sdio_irq_unsubscribe(void *priv) -{ - struct wfx_sdio_priv *bus = priv; - int ret; - - if (bus->of_irq) - devm_free_irq(&bus->func->dev, bus->of_irq, bus); - sdio_claim_host(bus->func); - ret = sdio_release_irq(bus->func); - sdio_release_host(bus->func); - return ret; -} - -static size_t wfx_sdio_align_size(void *priv, size_t size) -{ - struct wfx_sdio_priv *bus = priv; - - return sdio_align_size(bus->func, size); -} - -static const struct hwbus_ops wfx_sdio_hwbus_ops = { - .copy_from_io = wfx_sdio_copy_from_io, - .copy_to_io = wfx_sdio_copy_to_io, - .irq_subscribe = wfx_sdio_irq_subscribe, - .irq_unsubscribe = wfx_sdio_irq_unsubscribe, - .lock = wfx_sdio_lock, - .unlock = wfx_sdio_unlock, - .align_size = wfx_sdio_align_size, -}; - -static const struct of_device_id wfx_sdio_of_match[] = { - { .compatible = "silabs,wfx-sdio" }, - { .compatible = "silabs,wf200" }, - { }, -}; -MODULE_DEVICE_TABLE(of, wfx_sdio_of_match); - -static int wfx_sdio_probe(struct sdio_func *func, - const struct sdio_device_id *id) -{ - struct device_node *np = func->dev.of_node; - struct wfx_sdio_priv *bus; - int ret; - - if (func->num != 1) { - dev_err(&func->dev, "SDIO function number is %d while it should always be 1 (unsupported chip?)\n", - func->num); - return -ENODEV; - } - - bus = devm_kzalloc(&func->dev, sizeof(*bus), GFP_KERNEL); - if (!bus) - return -ENOMEM; - - if (np) { - if (!of_match_node(wfx_sdio_of_match, np)) { - dev_warn(&func->dev, "no compatible device found in DT\n"); - return -ENODEV; - } - bus->of_irq = irq_of_parse_and_map(np, 0); - } else { - dev_warn(&func->dev, - "device is not declared in DT, features will be limited\n"); - /* FIXME: ignore VID/PID and only rely on device tree */ - // return -ENODEV; - } - - bus->func = func; - sdio_set_drvdata(func, bus); - func->card->quirks |= MMC_QUIRK_LENIENT_FN0 | - MMC_QUIRK_BLKSZ_FOR_BYTE_MODE | - MMC_QUIRK_BROKEN_BYTE_MODE_512; - - sdio_claim_host(func); - ret = sdio_enable_func(func); - /* Block of 64 bytes is more efficient than 512B for frame sizes < 4k */ - sdio_set_block_size(func, 64); - sdio_release_host(func); - if (ret) - goto err0; - - bus->core = wfx_init_common(&func->dev, &wfx_sdio_pdata, - &wfx_sdio_hwbus_ops, bus); - if (!bus->core) { - ret = -EIO; - goto err1; - } - - ret = wfx_probe(bus->core); - if (ret) - goto err1; - - return 0; - -err1: - sdio_claim_host(func); - sdio_disable_func(func); - sdio_release_host(func); -err0: - return ret; -} - -static void wfx_sdio_remove(struct sdio_func *func) -{ - struct wfx_sdio_priv *bus = sdio_get_drvdata(func); - - wfx_release(bus->core); - sdio_claim_host(func); - sdio_disable_func(func); - sdio_release_host(func); -} - -#define SDIO_VENDOR_ID_SILABS 0x0000 -#define SDIO_DEVICE_ID_SILABS_WF200 0x1000 -static const struct sdio_device_id wfx_sdio_ids[] = { - { SDIO_DEVICE(SDIO_VENDOR_ID_SILABS, SDIO_DEVICE_ID_SILABS_WF200) }, - /* FIXME: ignore VID/PID and only rely on device tree */ - // { SDIO_DEVICE(SDIO_ANY_ID, SDIO_ANY_ID) }, - { }, -}; -MODULE_DEVICE_TABLE(sdio, wfx_sdio_ids); - -struct sdio_driver wfx_sdio_driver = { - .name = "wfx-sdio", - .id_table = wfx_sdio_ids, - .probe = wfx_sdio_probe, - .remove = wfx_sdio_remove, - .drv = { - .owner = THIS_MODULE, - .of_match_table = wfx_sdio_of_match, - } -}; |