Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jérôme Pouiller | 1255 | 97.29% | 18 | 81.82% |
Arnd Bergmann | 14 | 1.09% | 1 | 4.55% |
Michał Mirosław | 10 | 0.78% | 1 | 4.55% |
Greg Kroah-Hartman | 10 | 0.78% | 1 | 4.55% |
Rob Herring | 1 | 0.08% | 1 | 4.55% |
Total | 1290 | 22 |
// 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.h> #include <linux/of_irq.h> #include <linux/irq.h> #include <linux/align.h> #include "bus.h" #include "wfx.h" #include "hwio.h" #include "main.h" #include "bh.h" static const struct wfx_platform_data pdata_wf200 = { .file_fw = "wfx/wfm_wf200", .file_pds = "wfx/wf200.pds", }; static const struct wfx_platform_data pdata_brd4001a = { .file_fw = "wfx/wfm_wf200", .file_pds = "wfx/brd4001a.pds", }; static const struct wfx_platform_data pdata_brd8022a = { .file_fw = "wfx/wfm_wf200", .file_pds = "wfx/brd8022a.pds", }; static const struct wfx_platform_data pdata_brd8023a = { .file_fw = "wfx/wfm_wf200", .file_pds = "wfx/brd8023a.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(!IS_ALIGNED((uintptr_t)dst, 4), "unaligned buffer address"); WARN(!IS_ALIGNED(count, 4), "unaligned buffer size"); /* 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(!IS_ALIGNED((uintptr_t)src, 4), "unaligned buffer address"); WARN(!IS_ALIGNED(count, 4), "unaligned buffer size"); /* 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 wfx_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,wf200", .data = &pdata_wf200 }, { .compatible = "silabs,brd4001a", .data = &pdata_brd4001a }, { .compatible = "silabs,brd8022a", .data = &pdata_brd8022a }, { .compatible = "silabs,brd8023a", .data = &pdata_brd8023a }, { }, }; MODULE_DEVICE_TABLE(of, wfx_sdio_of_match); static int wfx_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id) { const struct wfx_platform_data *pdata = of_device_get_match_data(&func->dev); 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; } if (!pdata) { dev_warn(&func->dev, "no compatible device found in DT\n"); return -ENODEV; } bus = devm_kzalloc(&func->dev, sizeof(*bus), GFP_KERNEL); if (!bus) return -ENOMEM; bus->func = func; bus->of_irq = irq_of_parse_and_map(np, 0); sdio_set_drvdata(func, bus); 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) return ret; bus->core = wfx_init_common(&func->dev, pdata, &wfx_sdio_hwbus_ops, bus); if (!bus->core) { ret = -EIO; goto sdio_release; } ret = wfx_probe(bus->core); if (ret) goto sdio_release; return 0; sdio_release: sdio_claim_host(func); sdio_disable_func(func); sdio_release_host(func); 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); } static const struct sdio_device_id wfx_sdio_ids[] = { /* WF200 does not have official VID/PID */ { SDIO_DEVICE(0x0000, 0x1000) }, { }, }; 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 = { .of_match_table = wfx_sdio_of_match, } };
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