464 lines
11 KiB
C
464 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* This file is part of wl1271
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*
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* Copyright (C) 2009-2010 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*/
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#include <linux/irq.h>
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#include <linux/module.h>
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#include <linux/vmalloc.h>
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#include <linux/platform_device.h>
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#include <linux/mmc/sdio.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/card.h>
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#include <linux/mmc/host.h>
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#include <linux/gpio.h>
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#include <linux/pm_runtime.h>
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#include <linux/printk.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include "wlcore.h"
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#include "wl12xx_80211.h"
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#include "io.h"
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static bool dump;
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struct wl12xx_sdio_glue {
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struct device *dev;
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struct platform_device *core;
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};
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static const struct sdio_device_id wl1271_devices[] = {
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{ SDIO_DEVICE(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271) },
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{}
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};
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MODULE_DEVICE_TABLE(sdio, wl1271_devices);
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static void wl1271_sdio_set_block_size(struct device *child,
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unsigned int blksz)
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{
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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sdio_claim_host(func);
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sdio_set_block_size(func, blksz);
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sdio_release_host(func);
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}
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static int __must_check wl12xx_sdio_raw_read(struct device *child, int addr,
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void *buf, size_t len, bool fixed)
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{
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int ret;
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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sdio_claim_host(func);
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
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((u8 *)buf)[0] = sdio_f0_readb(func, addr, &ret);
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dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n",
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addr, ((u8 *)buf)[0]);
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} else {
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if (fixed)
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ret = sdio_readsb(func, buf, addr, len);
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else
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ret = sdio_memcpy_fromio(func, buf, addr, len);
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dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n",
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addr, len);
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}
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sdio_release_host(func);
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if (WARN_ON(ret))
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dev_err(child->parent, "sdio read failed (%d)\n", ret);
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if (unlikely(dump)) {
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printk(KERN_DEBUG "wlcore_sdio: READ from 0x%04x\n", addr);
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print_hex_dump(KERN_DEBUG, "wlcore_sdio: READ ",
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DUMP_PREFIX_OFFSET, 16, 1,
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buf, len, false);
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}
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return ret;
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}
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static int __must_check wl12xx_sdio_raw_write(struct device *child, int addr,
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void *buf, size_t len, bool fixed)
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{
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int ret;
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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sdio_claim_host(func);
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if (unlikely(dump)) {
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printk(KERN_DEBUG "wlcore_sdio: WRITE to 0x%04x\n", addr);
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print_hex_dump(KERN_DEBUG, "wlcore_sdio: WRITE ",
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DUMP_PREFIX_OFFSET, 16, 1,
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buf, len, false);
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}
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if (unlikely(addr == HW_ACCESS_ELP_CTRL_REG)) {
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sdio_f0_writeb(func, ((u8 *)buf)[0], addr, &ret);
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dev_dbg(child->parent, "sdio write 52 addr 0x%x, byte 0x%02x\n",
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addr, ((u8 *)buf)[0]);
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} else {
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dev_dbg(child->parent, "sdio write 53 addr 0x%x, %zu bytes\n",
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addr, len);
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if (fixed)
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ret = sdio_writesb(func, addr, buf, len);
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else
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ret = sdio_memcpy_toio(func, addr, buf, len);
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}
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sdio_release_host(func);
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if (WARN_ON(ret))
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dev_err(child->parent, "sdio write failed (%d)\n", ret);
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return ret;
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}
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static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
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{
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int ret;
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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struct mmc_card *card = func->card;
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ret = pm_runtime_resume_and_get(&card->dev);
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if (ret < 0) {
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dev_err(glue->dev, "%s: failed to get_sync(%d)\n",
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__func__, ret);
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return ret;
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}
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sdio_claim_host(func);
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/*
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* To guarantee that the SDIO card is power cycled, as required to make
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* the FW programming to succeed, let's do a brute force HW reset.
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*/
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mmc_hw_reset(card);
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sdio_enable_func(func);
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sdio_release_host(func);
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return 0;
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}
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static int wl12xx_sdio_power_off(struct wl12xx_sdio_glue *glue)
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{
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struct sdio_func *func = dev_to_sdio_func(glue->dev);
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struct mmc_card *card = func->card;
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sdio_claim_host(func);
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sdio_disable_func(func);
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sdio_release_host(func);
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/* Let runtime PM know the card is powered off */
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pm_runtime_put(&card->dev);
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return 0;
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}
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static int wl12xx_sdio_set_power(struct device *child, bool enable)
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{
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struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent);
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if (enable)
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return wl12xx_sdio_power_on(glue);
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else
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return wl12xx_sdio_power_off(glue);
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}
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static struct wl1271_if_operations sdio_ops = {
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.read = wl12xx_sdio_raw_read,
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.write = wl12xx_sdio_raw_write,
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.power = wl12xx_sdio_set_power,
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.set_block_size = wl1271_sdio_set_block_size,
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};
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#ifdef CONFIG_OF
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static const struct wilink_family_data wl127x_data = {
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.name = "wl127x",
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.nvs_name = "ti-connectivity/wl127x-nvs.bin",
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};
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static const struct wilink_family_data wl128x_data = {
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.name = "wl128x",
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.nvs_name = "ti-connectivity/wl128x-nvs.bin",
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};
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static const struct wilink_family_data wl18xx_data = {
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.name = "wl18xx",
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.cfg_name = "ti-connectivity/wl18xx-conf.bin",
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.nvs_name = "ti-connectivity/wl1271-nvs.bin",
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};
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static const struct of_device_id wlcore_sdio_of_match_table[] = {
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{ .compatible = "ti,wl1271", .data = &wl127x_data },
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{ .compatible = "ti,wl1273", .data = &wl127x_data },
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{ .compatible = "ti,wl1281", .data = &wl128x_data },
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{ .compatible = "ti,wl1283", .data = &wl128x_data },
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{ .compatible = "ti,wl1285", .data = &wl128x_data },
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{ .compatible = "ti,wl1801", .data = &wl18xx_data },
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{ .compatible = "ti,wl1805", .data = &wl18xx_data },
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{ .compatible = "ti,wl1807", .data = &wl18xx_data },
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{ .compatible = "ti,wl1831", .data = &wl18xx_data },
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{ .compatible = "ti,wl1835", .data = &wl18xx_data },
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{ .compatible = "ti,wl1837", .data = &wl18xx_data },
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{ }
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};
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static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq,
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struct wlcore_platdev_data *pdev_data)
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{
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struct device_node *np = dev->of_node;
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const struct of_device_id *of_id;
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of_id = of_match_node(wlcore_sdio_of_match_table, np);
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if (!of_id)
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return -ENODEV;
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pdev_data->family = of_id->data;
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*irq = irq_of_parse_and_map(np, 0);
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if (!*irq) {
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dev_err(dev, "No irq in platform data\n");
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return -EINVAL;
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}
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*wakeirq = irq_of_parse_and_map(np, 1);
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/* optional clock frequency params */
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of_property_read_u32(np, "ref-clock-frequency",
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&pdev_data->ref_clock_freq);
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of_property_read_u32(np, "tcxo-clock-frequency",
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&pdev_data->tcxo_clock_freq);
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return 0;
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}
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#else
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static int wlcore_probe_of(struct device *dev, int *irq, int *wakeirq,
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struct wlcore_platdev_data *pdev_data)
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{
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return -ENODATA;
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}
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#endif
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static int wl1271_probe(struct sdio_func *func,
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const struct sdio_device_id *id)
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{
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struct wlcore_platdev_data *pdev_data;
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struct wl12xx_sdio_glue *glue;
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struct resource res[2];
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mmc_pm_flag_t mmcflags;
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int ret = -ENOMEM;
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int irq, wakeirq, num_irqs;
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const char *chip_family;
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/* We are only able to handle the wlan function */
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if (func->num != 0x02)
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return -ENODEV;
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pdev_data = devm_kzalloc(&func->dev, sizeof(*pdev_data), GFP_KERNEL);
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if (!pdev_data)
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return -ENOMEM;
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pdev_data->if_ops = &sdio_ops;
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glue = devm_kzalloc(&func->dev, sizeof(*glue), GFP_KERNEL);
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if (!glue)
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return -ENOMEM;
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glue->dev = &func->dev;
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/* Grab access to FN0 for ELP reg. */
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func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
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/* Use block mode for transferring over one block size of data */
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func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
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ret = wlcore_probe_of(&func->dev, &irq, &wakeirq, pdev_data);
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if (ret)
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goto out;
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/* if sdio can keep power while host is suspended, enable wow */
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mmcflags = sdio_get_host_pm_caps(func);
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dev_dbg(glue->dev, "sdio PM caps = 0x%x\n", mmcflags);
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if (mmcflags & MMC_PM_KEEP_POWER)
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pdev_data->pwr_in_suspend = true;
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sdio_set_drvdata(func, glue);
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/* Tell PM core that we don't need the card to be powered now */
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pm_runtime_put_noidle(&func->dev);
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/*
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* Due to a hardware bug, we can't differentiate wl18xx from
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* wl12xx, because both report the same device ID. The only
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* way to differentiate is by checking the SDIO revision,
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* which is 3.00 on the wl18xx chips.
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*/
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if (func->card->cccr.sdio_vsn == SDIO_SDIO_REV_3_00)
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chip_family = "wl18xx";
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else
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chip_family = "wl12xx";
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glue->core = platform_device_alloc(chip_family, PLATFORM_DEVID_AUTO);
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if (!glue->core) {
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dev_err(glue->dev, "can't allocate platform_device");
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ret = -ENOMEM;
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goto out;
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}
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glue->core->dev.parent = &func->dev;
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memset(res, 0x00, sizeof(res));
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res[0].start = irq;
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res[0].flags = IORESOURCE_IRQ |
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irqd_get_trigger_type(irq_get_irq_data(irq));
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res[0].name = "irq";
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if (wakeirq > 0) {
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res[1].start = wakeirq;
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res[1].flags = IORESOURCE_IRQ |
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irqd_get_trigger_type(irq_get_irq_data(wakeirq));
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res[1].name = "wakeirq";
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num_irqs = 2;
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} else {
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num_irqs = 1;
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}
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ret = platform_device_add_resources(glue->core, res, num_irqs);
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if (ret) {
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dev_err(glue->dev, "can't add resources\n");
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goto out_dev_put;
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}
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ret = platform_device_add_data(glue->core, pdev_data,
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sizeof(*pdev_data));
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if (ret) {
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dev_err(glue->dev, "can't add platform data\n");
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goto out_dev_put;
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}
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ret = platform_device_add(glue->core);
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if (ret) {
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dev_err(glue->dev, "can't add platform device\n");
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goto out_dev_put;
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}
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return 0;
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out_dev_put:
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platform_device_put(glue->core);
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out:
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return ret;
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}
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static void wl1271_remove(struct sdio_func *func)
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{
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struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
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/* Undo decrement done above in wl1271_probe */
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pm_runtime_get_noresume(&func->dev);
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platform_device_unregister(glue->core);
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}
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#ifdef CONFIG_PM
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static int wl1271_suspend(struct device *dev)
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{
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/* Tell MMC/SDIO core it's OK to power down the card
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* (if it isn't already), but not to remove it completely */
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struct sdio_func *func = dev_to_sdio_func(dev);
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struct wl12xx_sdio_glue *glue = sdio_get_drvdata(func);
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struct wl1271 *wl = platform_get_drvdata(glue->core);
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mmc_pm_flag_t sdio_flags;
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int ret = 0;
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if (!wl) {
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dev_err(dev, "no wilink module was probed\n");
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goto out;
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}
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dev_dbg(dev, "wl1271 suspend. wow_enabled: %d\n",
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wl->wow_enabled);
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/* check whether sdio should keep power */
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if (wl->wow_enabled) {
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sdio_flags = sdio_get_host_pm_caps(func);
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if (!(sdio_flags & MMC_PM_KEEP_POWER)) {
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dev_err(dev, "can't keep power while host "
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"is suspended\n");
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ret = -EINVAL;
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goto out;
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}
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/* keep power while host suspended */
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ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
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if (ret) {
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dev_err(dev, "error while trying to keep power\n");
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goto out;
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}
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}
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out:
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return ret;
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}
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static int wl1271_resume(struct device *dev)
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{
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dev_dbg(dev, "wl1271 resume\n");
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return 0;
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}
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static const struct dev_pm_ops wl1271_sdio_pm_ops = {
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.suspend = wl1271_suspend,
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.resume = wl1271_resume,
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};
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#endif
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static struct sdio_driver wl1271_sdio_driver = {
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.name = "wl1271_sdio",
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.id_table = wl1271_devices,
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.probe = wl1271_probe,
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.remove = wl1271_remove,
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#ifdef CONFIG_PM
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.drv = {
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.pm = &wl1271_sdio_pm_ops,
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},
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#endif
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};
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static int __init wl1271_init(void)
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{
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return sdio_register_driver(&wl1271_sdio_driver);
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}
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static void __exit wl1271_exit(void)
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{
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sdio_unregister_driver(&wl1271_sdio_driver);
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}
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module_init(wl1271_init);
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module_exit(wl1271_exit);
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module_param(dump, bool, 0600);
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MODULE_PARM_DESC(dump, "Enable sdio read/write dumps.");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Luciano Coelho <coelho@ti.com>");
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MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
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