diff options
Diffstat (limited to 'drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c')
| -rw-r--r-- | drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c | 1188 |
1 files changed, 1188 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c new file mode 100644 index 0000000..58fffb9 --- /dev/null +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/bcmsdh.c @@ -0,0 +1,1188 @@ +// SPDX-License-Identifier: ISC +/* + * Copyright (c) 2010 Broadcom Corporation + */ +/* ****************** SDIO CARD Interface Functions **************************/ + +#include <linux/types.h> +#include <linux/netdevice.h> +#include <linux/pci.h> +#include <linux/pci_ids.h> +#include <linux/sched.h> +#include <linux/completion.h> +#include <linux/interrupt.h> +#include <linux/scatterlist.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/core.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> +#include <linux/pm_runtime.h> +#include <linux/suspend.h> +#include <linux/errno.h> +#include <linux/module.h> +#include <linux/acpi.h> +#include <net/cfg80211.h> + +#include <defs.h> +#include <brcm_hw_ids.h> +#include <brcmu_utils.h> +#include <brcmu_wifi.h> +#include <chipcommon.h> +#include <soc.h> +#include "chip.h" +#include "bus.h" +#include "debug.h" +#include "sdio.h" +#include "core.h" +#include "common.h" + +#define SDIOH_API_ACCESS_RETRY_LIMIT 2 + +#define DMA_ALIGN_MASK 0x03 + +#define SDIO_FUNC1_BLOCKSIZE 64 +#define SDIO_FUNC2_BLOCKSIZE 512 +/* Maximum milliseconds to wait for F2 to come up */ +#define SDIO_WAIT_F2RDY 3000 + +#define BRCMF_DEFAULT_RXGLOM_SIZE 32 /* max rx frames in glom chain */ + +struct brcmf_sdiod_freezer { + atomic_t freezing; + atomic_t thread_count; + u32 frozen_count; + wait_queue_head_t thread_freeze; + struct completion resumed; +}; + +static irqreturn_t brcmf_sdiod_oob_irqhandler(int irq, void *dev_id) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev_id); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + + brcmf_dbg(INTR, "OOB intr triggered\n"); + + /* out-of-band interrupt is level-triggered which won't + * be cleared until dpc + */ + if (sdiodev->irq_en) { + disable_irq_nosync(irq); + sdiodev->irq_en = false; + } + + brcmf_sdio_isr(sdiodev->bus); + + return IRQ_HANDLED; +} + +static void brcmf_sdiod_ib_irqhandler(struct sdio_func *func) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(&func->dev); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + + brcmf_dbg(INTR, "IB intr triggered\n"); + + brcmf_sdio_isr(sdiodev->bus); +} + +/* dummy handler for SDIO function 2 interrupt */ +static void brcmf_sdiod_dummy_irqhandler(struct sdio_func *func) +{ +} + +int brcmf_sdiod_intr_register(struct brcmf_sdio_dev *sdiodev) +{ + struct brcmfmac_sdio_pd *pdata; + int ret = 0; + u8 data; + u32 addr, gpiocontrol; + + pdata = &sdiodev->settings->bus.sdio; + if (pdata->oob_irq_supported) { + brcmf_dbg(SDIO, "Enter, register OOB IRQ %d\n", + pdata->oob_irq_nr); + spin_lock_init(&sdiodev->irq_en_lock); + sdiodev->irq_en = true; + + ret = request_irq(pdata->oob_irq_nr, brcmf_sdiod_oob_irqhandler, + pdata->oob_irq_flags, "brcmf_oob_intr", + &sdiodev->func1->dev); + if (ret != 0) { + brcmf_err("request_irq failed %d\n", ret); + return ret; + } + sdiodev->oob_irq_requested = true; + + ret = enable_irq_wake(pdata->oob_irq_nr); + if (ret != 0) { + brcmf_err("enable_irq_wake failed %d\n", ret); + return ret; + } + sdiodev->irq_wake = true; + + sdio_claim_host(sdiodev->func1); + + if (sdiodev->bus_if->chip == BRCM_CC_43362_CHIP_ID) { + /* assign GPIO to SDIO core */ + addr = CORE_CC_REG(SI_ENUM_BASE, gpiocontrol); + gpiocontrol = brcmf_sdiod_readl(sdiodev, addr, &ret); + gpiocontrol |= 0x2; + brcmf_sdiod_writel(sdiodev, addr, gpiocontrol, &ret); + + brcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_SELECT, + 0xf, &ret); + brcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_OUT, 0, &ret); + brcmf_sdiod_writeb(sdiodev, SBSDIO_GPIO_EN, 0x2, &ret); + } + + /* must configure SDIO_CCCR_IENx to enable irq */ + data = brcmf_sdiod_func0_rb(sdiodev, SDIO_CCCR_IENx, &ret); + data |= SDIO_CCCR_IEN_FUNC1 | SDIO_CCCR_IEN_FUNC2 | + SDIO_CCCR_IEN_FUNC0; + brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_IENx, data, &ret); + + /* redirect, configure and enable io for interrupt signal */ + data = SDIO_CCCR_BRCM_SEPINT_MASK | SDIO_CCCR_BRCM_SEPINT_OE; + if (pdata->oob_irq_flags & IRQF_TRIGGER_HIGH) + data |= SDIO_CCCR_BRCM_SEPINT_ACT_HI; + brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_SEPINT, + data, &ret); + sdio_release_host(sdiodev->func1); + } else { + brcmf_dbg(SDIO, "Entering\n"); + sdio_claim_host(sdiodev->func1); + sdio_claim_irq(sdiodev->func1, brcmf_sdiod_ib_irqhandler); + sdio_claim_irq(sdiodev->func2, brcmf_sdiod_dummy_irqhandler); + sdio_release_host(sdiodev->func1); + sdiodev->sd_irq_requested = true; + } + + return 0; +} + +void brcmf_sdiod_intr_unregister(struct brcmf_sdio_dev *sdiodev) +{ + + brcmf_dbg(SDIO, "Entering oob=%d sd=%d\n", + sdiodev->oob_irq_requested, + sdiodev->sd_irq_requested); + + if (sdiodev->oob_irq_requested) { + struct brcmfmac_sdio_pd *pdata; + + pdata = &sdiodev->settings->bus.sdio; + sdio_claim_host(sdiodev->func1); + brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_SEPINT, 0, NULL); + brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_IENx, 0, NULL); + sdio_release_host(sdiodev->func1); + + sdiodev->oob_irq_requested = false; + if (sdiodev->irq_wake) { + disable_irq_wake(pdata->oob_irq_nr); + sdiodev->irq_wake = false; + } + free_irq(pdata->oob_irq_nr, &sdiodev->func1->dev); + sdiodev->irq_en = false; + sdiodev->oob_irq_requested = false; + } + + if (sdiodev->sd_irq_requested) { + sdio_claim_host(sdiodev->func1); + sdio_release_irq(sdiodev->func2); + sdio_release_irq(sdiodev->func1); + sdio_release_host(sdiodev->func1); + sdiodev->sd_irq_requested = false; + } +} + +void brcmf_sdiod_change_state(struct brcmf_sdio_dev *sdiodev, + enum brcmf_sdiod_state state) +{ + if (sdiodev->state == BRCMF_SDIOD_NOMEDIUM || + state == sdiodev->state) + return; + + brcmf_dbg(TRACE, "%d -> %d\n", sdiodev->state, state); + switch (sdiodev->state) { + case BRCMF_SDIOD_DATA: + /* any other state means bus interface is down */ + brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_DOWN); + break; + case BRCMF_SDIOD_DOWN: + /* transition from DOWN to DATA means bus interface is up */ + if (state == BRCMF_SDIOD_DATA) + brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_UP); + break; + default: + break; + } + sdiodev->state = state; +} + +static int brcmf_sdiod_set_backplane_window(struct brcmf_sdio_dev *sdiodev, + u32 addr) +{ + u32 v, bar0 = addr & SBSDIO_SBWINDOW_MASK; + int err = 0, i; + + if (bar0 == sdiodev->sbwad) + return 0; + + v = bar0 >> 8; + + for (i = 0 ; i < 3 && !err ; i++, v >>= 8) + brcmf_sdiod_writeb(sdiodev, SBSDIO_FUNC1_SBADDRLOW + i, + v & 0xff, &err); + + if (!err) + sdiodev->sbwad = bar0; + + return err; +} + +u32 brcmf_sdiod_readl(struct brcmf_sdio_dev *sdiodev, u32 addr, int *ret) +{ + u32 data = 0; + int retval; + + retval = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (retval) + goto out; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + data = sdio_readl(sdiodev->func1, addr, &retval); + +out: + if (ret) + *ret = retval; + + return data; +} + +void brcmf_sdiod_writel(struct brcmf_sdio_dev *sdiodev, u32 addr, + u32 data, int *ret) +{ + int retval; + + retval = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (retval) + goto out; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + sdio_writel(sdiodev->func1, data, addr, &retval); + +out: + if (ret) + *ret = retval; +} + +static int brcmf_sdiod_skbuff_read(struct brcmf_sdio_dev *sdiodev, + struct sdio_func *func, u32 addr, + struct sk_buff *skb) +{ + unsigned int req_sz; + int err; + + /* Single skb use the standard mmc interface */ + req_sz = skb->len + 3; + req_sz &= (uint)~3; + + switch (func->num) { + case 1: + err = sdio_memcpy_fromio(func, ((u8 *)(skb->data)), addr, + req_sz); + break; + case 2: + err = sdio_readsb(func, ((u8 *)(skb->data)), addr, req_sz); + break; + default: + /* bail out as things are really fishy here */ + WARN(1, "invalid sdio function number: %d\n", func->num); + err = -ENOMEDIUM; + } + + if (err == -ENOMEDIUM) + brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM); + + return err; +} + +static int brcmf_sdiod_skbuff_write(struct brcmf_sdio_dev *sdiodev, + struct sdio_func *func, u32 addr, + struct sk_buff *skb) +{ + unsigned int req_sz; + int err; + + /* Single skb use the standard mmc interface */ + req_sz = skb->len + 3; + req_sz &= (uint)~3; + + err = sdio_memcpy_toio(func, addr, ((u8 *)(skb->data)), req_sz); + + if (err == -ENOMEDIUM) + brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM); + + return err; +} + +static int mmc_submit_one(struct mmc_data *md, struct mmc_request *mr, + struct mmc_command *mc, int sg_cnt, int req_sz, + int func_blk_sz, u32 *addr, + struct brcmf_sdio_dev *sdiodev, + struct sdio_func *func, int write) +{ + int ret; + + md->sg_len = sg_cnt; + md->blocks = req_sz / func_blk_sz; + mc->arg |= (*addr & 0x1FFFF) << 9; /* address */ + mc->arg |= md->blocks & 0x1FF; /* block count */ + /* incrementing addr for function 1 */ + if (func->num == 1) + *addr += req_sz; + + mmc_set_data_timeout(md, func->card); + mmc_wait_for_req(func->card->host, mr); + + ret = mc->error ? mc->error : md->error; + if (ret == -ENOMEDIUM) { + brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_NOMEDIUM); + } else if (ret != 0) { + brcmf_err("CMD53 sg block %s failed %d\n", + write ? "write" : "read", ret); + ret = -EIO; + } + + return ret; +} + +/** + * brcmf_sdiod_sglist_rw - SDIO interface function for block data access + * @sdiodev: brcmfmac sdio device + * @func: SDIO function + * @write: direction flag + * @addr: dongle memory address as source/destination + * @pkt: skb pointer + * + * This function takes the respbonsibility as the interface function to MMC + * stack for block data access. It assumes that the skb passed down by the + * caller has already been padded and aligned. + */ +static int brcmf_sdiod_sglist_rw(struct brcmf_sdio_dev *sdiodev, + struct sdio_func *func, + bool write, u32 addr, + struct sk_buff_head *pktlist) +{ + unsigned int req_sz, func_blk_sz, sg_cnt, sg_data_sz, pkt_offset; + unsigned int max_req_sz, src_offset, dst_offset; + unsigned char *pkt_data, *orig_data, *dst_data; + struct sk_buff_head local_list, *target_list; + struct sk_buff *pkt_next = NULL, *src; + unsigned short max_seg_cnt; + struct mmc_request mmc_req; + struct mmc_command mmc_cmd; + struct mmc_data mmc_dat; + struct scatterlist *sgl; + int ret = 0; + + if (!pktlist->qlen) + return -EINVAL; + + target_list = pktlist; + /* for host with broken sg support, prepare a page aligned list */ + __skb_queue_head_init(&local_list); + if (!write && sdiodev->settings->bus.sdio.broken_sg_support) { + req_sz = 0; + skb_queue_walk(pktlist, pkt_next) + req_sz += pkt_next->len; + req_sz = ALIGN(req_sz, func->cur_blksize); + while (req_sz > PAGE_SIZE) { + pkt_next = brcmu_pkt_buf_get_skb(PAGE_SIZE); + if (pkt_next == NULL) { + ret = -ENOMEM; + goto exit; + } + __skb_queue_tail(&local_list, pkt_next); + req_sz -= PAGE_SIZE; + } + pkt_next = brcmu_pkt_buf_get_skb(req_sz); + if (pkt_next == NULL) { + ret = -ENOMEM; + goto exit; + } + __skb_queue_tail(&local_list, pkt_next); + target_list = &local_list; + } + + func_blk_sz = func->cur_blksize; + max_req_sz = sdiodev->max_request_size; + max_seg_cnt = min_t(unsigned short, sdiodev->max_segment_count, + target_list->qlen); + + memset(&mmc_req, 0, sizeof(struct mmc_request)); + memset(&mmc_cmd, 0, sizeof(struct mmc_command)); + memset(&mmc_dat, 0, sizeof(struct mmc_data)); + + mmc_dat.sg = sdiodev->sgtable.sgl; + mmc_dat.blksz = func_blk_sz; + mmc_dat.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ; + mmc_cmd.opcode = SD_IO_RW_EXTENDED; + mmc_cmd.arg = write ? 1<<31 : 0; /* write flag */ + mmc_cmd.arg |= (func->num & 0x7) << 28; /* SDIO func num */ + mmc_cmd.arg |= 1 << 27; /* block mode */ + /* for function 1 the addr will be incremented */ + mmc_cmd.arg |= (func->num == 1) ? 1 << 26 : 0; + mmc_cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; + mmc_req.cmd = &mmc_cmd; + mmc_req.data = &mmc_dat; + + req_sz = 0; + sg_cnt = 0; + sgl = sdiodev->sgtable.sgl; + skb_queue_walk(target_list, pkt_next) { + pkt_offset = 0; + while (pkt_offset < pkt_next->len) { + pkt_data = pkt_next->data + pkt_offset; + sg_data_sz = pkt_next->len - pkt_offset; + if (sg_data_sz > sdiodev->max_segment_size) + sg_data_sz = sdiodev->max_segment_size; + if (sg_data_sz > max_req_sz - req_sz) + sg_data_sz = max_req_sz - req_sz; + + sg_set_buf(sgl, pkt_data, sg_data_sz); + sg_cnt++; + + sgl = sg_next(sgl); + req_sz += sg_data_sz; + pkt_offset += sg_data_sz; + if (req_sz >= max_req_sz || sg_cnt >= max_seg_cnt) { + ret = mmc_submit_one(&mmc_dat, &mmc_req, &mmc_cmd, + sg_cnt, req_sz, func_blk_sz, + &addr, sdiodev, func, write); + if (ret) + goto exit_queue_walk; + req_sz = 0; + sg_cnt = 0; + sgl = sdiodev->sgtable.sgl; + } + } + } + if (sg_cnt) + ret = mmc_submit_one(&mmc_dat, &mmc_req, &mmc_cmd, + sg_cnt, req_sz, func_blk_sz, + &addr, sdiodev, func, write); +exit_queue_walk: + if (!write && sdiodev->settings->bus.sdio.broken_sg_support) { + src = __skb_peek(&local_list); + src_offset = 0; + skb_queue_walk(pktlist, pkt_next) { + dst_offset = 0; + + /* This is safe because we must have enough SKB data + * in the local list to cover everything in pktlist. + */ + while (1) { + req_sz = pkt_next->len - dst_offset; + if (req_sz > src->len - src_offset) + req_sz = src->len - src_offset; + + orig_data = src->data + src_offset; + dst_data = pkt_next->data + dst_offset; + memcpy(dst_data, orig_data, req_sz); + + src_offset += req_sz; + if (src_offset == src->len) { + src_offset = 0; + src = skb_peek_next(src, &local_list); + } + dst_offset += req_sz; + if (dst_offset == pkt_next->len) + break; + } + } + } + +exit: + sg_init_table(sdiodev->sgtable.sgl, sdiodev->sgtable.orig_nents); + while ((pkt_next = __skb_dequeue(&local_list)) != NULL) + brcmu_pkt_buf_free_skb(pkt_next); + + return ret; +} + +int brcmf_sdiod_recv_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes) +{ + struct sk_buff *mypkt; + int err; + + mypkt = brcmu_pkt_buf_get_skb(nbytes); + if (!mypkt) { + brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n", + nbytes); + return -EIO; + } + + err = brcmf_sdiod_recv_pkt(sdiodev, mypkt); + if (!err) + memcpy(buf, mypkt->data, nbytes); + + brcmu_pkt_buf_free_skb(mypkt); + return err; +} + +int brcmf_sdiod_recv_pkt(struct brcmf_sdio_dev *sdiodev, struct sk_buff *pkt) +{ + u32 addr = sdiodev->cc_core->base; + int err = 0; + + brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pkt->len); + + err = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (err) + goto done; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + err = brcmf_sdiod_skbuff_read(sdiodev, sdiodev->func2, addr, pkt); + +done: + return err; +} + +int brcmf_sdiod_recv_chain(struct brcmf_sdio_dev *sdiodev, + struct sk_buff_head *pktq, uint totlen) +{ + struct sk_buff *glom_skb = NULL; + struct sk_buff *skb; + u32 addr = sdiodev->cc_core->base; + int err = 0; + + brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", + addr, pktq->qlen); + + err = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (err) + goto done; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + if (pktq->qlen == 1) + err = brcmf_sdiod_skbuff_read(sdiodev, sdiodev->func2, addr, + __skb_peek(pktq)); + else if (!sdiodev->sg_support) { + glom_skb = brcmu_pkt_buf_get_skb(totlen); + if (!glom_skb) + return -ENOMEM; + err = brcmf_sdiod_skbuff_read(sdiodev, sdiodev->func2, addr, + glom_skb); + if (err) + goto done; + + skb_queue_walk(pktq, skb) { + memcpy(skb->data, glom_skb->data, skb->len); + skb_pull(glom_skb, skb->len); + } + } else + err = brcmf_sdiod_sglist_rw(sdiodev, sdiodev->func2, false, + addr, pktq); + +done: + brcmu_pkt_buf_free_skb(glom_skb); + return err; +} + +int brcmf_sdiod_send_buf(struct brcmf_sdio_dev *sdiodev, u8 *buf, uint nbytes) +{ + struct sk_buff *mypkt; + u32 addr = sdiodev->cc_core->base; + int err; + + mypkt = brcmu_pkt_buf_get_skb(nbytes); + + if (!mypkt) { + brcmf_err("brcmu_pkt_buf_get_skb failed: len %d\n", + nbytes); + return -EIO; + } + + memcpy(mypkt->data, buf, nbytes); + + err = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (err) + goto out; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, addr, mypkt); +out: + brcmu_pkt_buf_free_skb(mypkt); + + return err; +} + +int brcmf_sdiod_send_pkt(struct brcmf_sdio_dev *sdiodev, + struct sk_buff_head *pktq) +{ + struct sk_buff *skb; + u32 addr = sdiodev->cc_core->base; + int err; + + brcmf_dbg(SDIO, "addr = 0x%x, size = %d\n", addr, pktq->qlen); + + err = brcmf_sdiod_set_backplane_window(sdiodev, addr); + if (err) + return err; + + addr &= SBSDIO_SB_OFT_ADDR_MASK; + addr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + if (pktq->qlen == 1 || !sdiodev->sg_support) { + skb_queue_walk(pktq, skb) { + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func2, + addr, skb); + if (err) + break; + } + } else { + err = brcmf_sdiod_sglist_rw(sdiodev, sdiodev->func2, true, + addr, pktq); + } + + return err; +} + +int +brcmf_sdiod_ramrw(struct brcmf_sdio_dev *sdiodev, bool write, u32 address, + u8 *data, uint size) +{ + int err = 0; + struct sk_buff *pkt; + u32 sdaddr; + uint dsize; + + dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size); + pkt = dev_alloc_skb(dsize); + if (!pkt) { + brcmf_err("dev_alloc_skb failed: len %d\n", dsize); + return -EIO; + } + pkt->priority = 0; + + /* Determine initial transfer parameters */ + sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK; + if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK) + dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr); + else + dsize = size; + + sdio_claim_host(sdiodev->func1); + + /* Do the transfer(s) */ + while (size) { + /* Set the backplane window to include the start address */ + err = brcmf_sdiod_set_backplane_window(sdiodev, address); + if (err) + break; + + brcmf_dbg(SDIO, "%s %d bytes at offset 0x%08x in window 0x%08x\n", + write ? "write" : "read", dsize, + sdaddr, address & SBSDIO_SBWINDOW_MASK); + + sdaddr &= SBSDIO_SB_OFT_ADDR_MASK; + sdaddr |= SBSDIO_SB_ACCESS_2_4B_FLAG; + + skb_put(pkt, dsize); + + if (write) { + memcpy(pkt->data, data, dsize); + err = brcmf_sdiod_skbuff_write(sdiodev, sdiodev->func1, + sdaddr, pkt); + } else { + err = brcmf_sdiod_skbuff_read(sdiodev, sdiodev->func1, + sdaddr, pkt); + } + + if (err) { + brcmf_err("membytes transfer failed\n"); + break; + } + if (!write) + memcpy(data, pkt->data, dsize); + skb_trim(pkt, 0); + + /* Adjust for next transfer (if any) */ + size -= dsize; + if (size) { + data += dsize; + address += dsize; + sdaddr = 0; + dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size); + } + } + + dev_kfree_skb(pkt); + + sdio_release_host(sdiodev->func1); + + return err; +} + +int brcmf_sdiod_abort(struct brcmf_sdio_dev *sdiodev, struct sdio_func *func) +{ + brcmf_dbg(SDIO, "Enter\n"); + + /* Issue abort cmd52 command through F0 */ + brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_ABORT, func->num, NULL); + + brcmf_dbg(SDIO, "Exit\n"); + return 0; +} + +void brcmf_sdiod_sgtable_alloc(struct brcmf_sdio_dev *sdiodev) +{ + struct sdio_func *func; + struct mmc_host *host; + uint max_blocks; + uint nents; + int err; + + func = sdiodev->func2; + host = func->card->host; + sdiodev->sg_support = host->max_segs > 1; + max_blocks = min_t(uint, host->max_blk_count, 511u); + sdiodev->max_request_size = min_t(uint, host->max_req_size, + max_blocks * func->cur_blksize); + sdiodev->max_segment_count = min_t(uint, host->max_segs, + SG_MAX_SINGLE_ALLOC); + sdiodev->max_segment_size = host->max_seg_size; + + if (!sdiodev->sg_support) + return; + + nents = max_t(uint, BRCMF_DEFAULT_RXGLOM_SIZE, + sdiodev->settings->bus.sdio.txglomsz); + nents += (nents >> 4) + 1; + + WARN_ON(nents > sdiodev->max_segment_count); + + brcmf_dbg(TRACE, "nents=%d\n", nents); + err = sg_alloc_table(&sdiodev->sgtable, nents, GFP_KERNEL); + if (err < 0) { + brcmf_err("allocation failed: disable scatter-gather"); + sdiodev->sg_support = false; + } + + sdiodev->txglomsz = sdiodev->settings->bus.sdio.txglomsz; +} + +#ifdef CONFIG_PM_SLEEP +static int brcmf_sdiod_freezer_attach(struct brcmf_sdio_dev *sdiodev) +{ + sdiodev->freezer = kzalloc(sizeof(*sdiodev->freezer), GFP_KERNEL); + if (!sdiodev->freezer) + return -ENOMEM; + atomic_set(&sdiodev->freezer->thread_count, 0); + atomic_set(&sdiodev->freezer->freezing, 0); + init_waitqueue_head(&sdiodev->freezer->thread_freeze); + init_completion(&sdiodev->freezer->resumed); + return 0; +} + +static void brcmf_sdiod_freezer_detach(struct brcmf_sdio_dev *sdiodev) +{ + if (sdiodev->freezer) { + WARN_ON(atomic_read(&sdiodev->freezer->freezing)); + kfree(sdiodev->freezer); + } +} + +static int brcmf_sdiod_freezer_on(struct brcmf_sdio_dev *sdiodev) +{ + atomic_t *expect = &sdiodev->freezer->thread_count; + int res = 0; + + sdiodev->freezer->frozen_count = 0; + reinit_completion(&sdiodev->freezer->resumed); + atomic_set(&sdiodev->freezer->freezing, 1); + brcmf_sdio_trigger_dpc(sdiodev->bus); + wait_event(sdiodev->freezer->thread_freeze, + atomic_read(expect) == sdiodev->freezer->frozen_count); + sdio_claim_host(sdiodev->func1); + res = brcmf_sdio_sleep(sdiodev->bus, true); + sdio_release_host(sdiodev->func1); + return res; +} + +static void brcmf_sdiod_freezer_off(struct brcmf_sdio_dev *sdiodev) +{ + sdio_claim_host(sdiodev->func1); + brcmf_sdio_sleep(sdiodev->bus, false); + sdio_release_host(sdiodev->func1); + atomic_set(&sdiodev->freezer->freezing, 0); + complete_all(&sdiodev->freezer->resumed); +} + +bool brcmf_sdiod_freezing(struct brcmf_sdio_dev *sdiodev) +{ + return atomic_read(&sdiodev->freezer->freezing); +} + +void brcmf_sdiod_try_freeze(struct brcmf_sdio_dev *sdiodev) +{ + if (!brcmf_sdiod_freezing(sdiodev)) + return; + sdiodev->freezer->frozen_count++; + wake_up(&sdiodev->freezer->thread_freeze); + wait_for_completion(&sdiodev->freezer->resumed); +} + +void brcmf_sdiod_freezer_count(struct brcmf_sdio_dev *sdiodev) +{ + atomic_inc(&sdiodev->freezer->thread_count); +} + +void brcmf_sdiod_freezer_uncount(struct brcmf_sdio_dev *sdiodev) +{ + atomic_dec(&sdiodev->freezer->thread_count); +} +#else +static int brcmf_sdiod_freezer_attach(struct brcmf_sdio_dev *sdiodev) +{ + return 0; +} + +static void brcmf_sdiod_freezer_detach(struct brcmf_sdio_dev *sdiodev) +{ +} +#endif /* CONFIG_PM_SLEEP */ + +static int brcmf_sdiod_remove(struct brcmf_sdio_dev *sdiodev) +{ + sdiodev->state = BRCMF_SDIOD_DOWN; + if (sdiodev->bus) { + brcmf_sdio_remove(sdiodev->bus); + sdiodev->bus = NULL; + } + + brcmf_sdiod_freezer_detach(sdiodev); + + /* Disable Function 2 */ + sdio_claim_host(sdiodev->func2); + sdio_disable_func(sdiodev->func2); + sdio_release_host(sdiodev->func2); + + /* Disable Function 1 */ + sdio_claim_host(sdiodev->func1); + sdio_disable_func(sdiodev->func1); + sdio_release_host(sdiodev->func1); + + sg_free_table(&sdiodev->sgtable); + sdiodev->sbwad = 0; + + pm_runtime_allow(sdiodev->func1->card->host->parent); + return 0; +} + +static void brcmf_sdiod_host_fixup(struct mmc_host *host) +{ + /* runtime-pm powers off the device */ + pm_runtime_forbid(host->parent); + /* avoid removal detection upon resume */ + host->caps |= MMC_CAP_NONREMOVABLE; +} + +static int brcmf_sdiod_probe(struct brcmf_sdio_dev *sdiodev) +{ + int ret = 0; + + sdio_claim_host(sdiodev->func1); + + ret = sdio_set_block_size(sdiodev->func1, SDIO_FUNC1_BLOCKSIZE); + if (ret) { + brcmf_err("Failed to set F1 blocksize\n"); + sdio_release_host(sdiodev->func1); + goto out; + } + ret = sdio_set_block_size(sdiodev->func2, SDIO_FUNC2_BLOCKSIZE); + if (ret) { + brcmf_err("Failed to set F2 blocksize\n"); + sdio_release_host(sdiodev->func1); + goto out; + } + + /* increase F2 timeout */ + sdiodev->func2->enable_timeout = SDIO_WAIT_F2RDY; + + /* Enable Function 1 */ + ret = sdio_enable_func(sdiodev->func1); + sdio_release_host(sdiodev->func1); + if (ret) { + brcmf_err("Failed to enable F1: err=%d\n", ret); + goto out; + } + + ret = brcmf_sdiod_freezer_attach(sdiodev); + if (ret) + goto out; + + /* try to attach to the target device */ + sdiodev->bus = brcmf_sdio_probe(sdiodev); + if (!sdiodev->bus) { + ret = -ENODEV; + goto out; + } + brcmf_sdiod_host_fixup(sdiodev->func2->card->host); +out: + if (ret) + brcmf_sdiod_remove(sdiodev); + + return ret; +} + +#define BRCMF_SDIO_DEVICE(dev_id) \ + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, dev_id)} + +/* devices we support, null terminated */ +static const struct sdio_device_id brcmf_sdmmc_ids[] = { + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43143), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43241), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4329), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4330), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4334), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43340), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43341), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43362), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43364), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4335_4339), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4339), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43430), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4345), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_43455), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4354), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_BROADCOM_4356), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_4373), + BRCMF_SDIO_DEVICE(SDIO_DEVICE_ID_CYPRESS_43012), + { /* end: all zeroes */ } +}; +MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids); + + +static void brcmf_sdiod_acpi_set_power_manageable(struct device *dev, + int val) +{ +#if IS_ENABLED(CONFIG_ACPI) + struct acpi_device *adev; + + adev = ACPI_COMPANION(dev); + if (adev) + adev->flags.power_manageable = 0; +#endif +} + +static int brcmf_ops_sdio_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + int err; + struct brcmf_sdio_dev *sdiodev; + struct brcmf_bus *bus_if; + struct device *dev; + + brcmf_dbg(SDIO, "Enter\n"); + brcmf_dbg(SDIO, "Class=%x\n", func->class); + brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor); + brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device); + brcmf_dbg(SDIO, "Function#: %d\n", func->num); + + dev = &func->dev; + + /* Set MMC_QUIRK_LENIENT_FN0 for this card */ + func->card->quirks |= MMC_QUIRK_LENIENT_FN0; + + /* prohibit ACPI power management for this device */ + brcmf_sdiod_acpi_set_power_manageable(dev, 0); + + /* Consume func num 1 but dont do anything with it. */ + if (func->num == 1) + return 0; + + /* Ignore anything but func 2 */ + if (func->num != 2) + return -ENODEV; + + bus_if = kzalloc(sizeof(struct brcmf_bus), GFP_KERNEL); + if (!bus_if) + return -ENOMEM; + sdiodev = kzalloc(sizeof(struct brcmf_sdio_dev), GFP_KERNEL); + if (!sdiodev) { + kfree(bus_if); + return -ENOMEM; + } + + /* store refs to functions used. mmc_card does + * not hold the F0 function pointer. + */ + sdiodev->func1 = func->card->sdio_func[0]; + sdiodev->func2 = func; + + sdiodev->bus_if = bus_if; + bus_if->bus_priv.sdio = sdiodev; + bus_if->proto_type = BRCMF_PROTO_BCDC; + dev_set_drvdata(&func->dev, bus_if); + dev_set_drvdata(&sdiodev->func1->dev, bus_if); + sdiodev->dev = &sdiodev->func1->dev; + + brcmf_sdiod_change_state(sdiodev, BRCMF_SDIOD_DOWN); + + brcmf_dbg(SDIO, "F2 found, calling brcmf_sdiod_probe...\n"); + err = brcmf_sdiod_probe(sdiodev); + if (err) { + brcmf_err("F2 error, probe failed %d...\n", err); + goto fail; + } + + brcmf_dbg(SDIO, "F2 init completed...\n"); + return 0; + +fail: + dev_set_drvdata(&func->dev, NULL); + dev_set_drvdata(&sdiodev->func1->dev, NULL); + kfree(sdiodev); + kfree(bus_if); + return err; +} + +static void brcmf_ops_sdio_remove(struct sdio_func *func) +{ + struct brcmf_bus *bus_if; + struct brcmf_sdio_dev *sdiodev; + + brcmf_dbg(SDIO, "Enter\n"); + brcmf_dbg(SDIO, "sdio vendor ID: 0x%04x\n", func->vendor); + brcmf_dbg(SDIO, "sdio device ID: 0x%04x\n", func->device); + brcmf_dbg(SDIO, "Function: %d\n", func->num); + + bus_if = dev_get_drvdata(&func->dev); + if (bus_if) { + sdiodev = bus_if->bus_priv.sdio; + + /* start by unregistering irqs */ + brcmf_sdiod_intr_unregister(sdiodev); + + if (func->num != 1) + return; + + /* only proceed with rest of cleanup if func 1 */ + brcmf_sdiod_remove(sdiodev); + + dev_set_drvdata(&sdiodev->func1->dev, NULL); + dev_set_drvdata(&sdiodev->func2->dev, NULL); + + kfree(bus_if); + kfree(sdiodev); + } + + brcmf_dbg(SDIO, "Exit\n"); +} + +void brcmf_sdio_wowl_config(struct device *dev, bool enabled) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + + brcmf_dbg(SDIO, "Configuring WOWL, enabled=%d\n", enabled); + sdiodev->wowl_enabled = enabled; +} + +#ifdef CONFIG_PM_SLEEP +static int brcmf_ops_sdio_suspend(struct device *dev) +{ + struct sdio_func *func; + struct brcmf_bus *bus_if; + struct brcmf_sdio_dev *sdiodev; + mmc_pm_flag_t sdio_flags; + + func = container_of(dev, struct sdio_func, dev); + brcmf_dbg(SDIO, "Enter: F%d\n", func->num); + if (func->num != 1) + return 0; + + + bus_if = dev_get_drvdata(dev); + sdiodev = bus_if->bus_priv.sdio; + + brcmf_sdiod_freezer_on(sdiodev); + brcmf_sdio_wd_timer(sdiodev->bus, 0); + + sdio_flags = MMC_PM_KEEP_POWER; + if (sdiodev->wowl_enabled) { + if (sdiodev->settings->bus.sdio.oob_irq_supported) + enable_irq_wake(sdiodev->settings->bus.sdio.oob_irq_nr); + else + sdio_flags |= MMC_PM_WAKE_SDIO_IRQ; + } + if (sdio_set_host_pm_flags(sdiodev->func1, sdio_flags)) + brcmf_err("Failed to set pm_flags %x\n", sdio_flags); + return 0; +} + +static int brcmf_ops_sdio_resume(struct device *dev) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + struct sdio_func *func = container_of(dev, struct sdio_func, dev); + + brcmf_dbg(SDIO, "Enter: F%d\n", func->num); + if (func->num != 2) + return 0; + + brcmf_sdiod_freezer_off(sdiodev); + return 0; +} + +static const struct dev_pm_ops brcmf_sdio_pm_ops = { + .suspend = brcmf_ops_sdio_suspend, + .resume = brcmf_ops_sdio_resume, +}; +#endif /* CONFIG_PM_SLEEP */ + +static struct sdio_driver brcmf_sdmmc_driver = { + .probe = brcmf_ops_sdio_probe, + .remove = brcmf_ops_sdio_remove, + .name = KBUILD_MODNAME, + .id_table = brcmf_sdmmc_ids, + .drv = { + .owner = THIS_MODULE, +#ifdef CONFIG_PM_SLEEP + .pm = &brcmf_sdio_pm_ops, +#endif /* CONFIG_PM_SLEEP */ +#if LINUX_VERSION_IS_GEQ(4,17,0) + .coredump = brcmf_dev_coredump, +#endif + }, +}; + +void brcmf_sdio_register(void) +{ + int ret; + + ret = sdio_register_driver(&brcmf_sdmmc_driver); + if (ret) + brcmf_err("sdio_register_driver failed: %d\n", ret); +} + +void brcmf_sdio_exit(void) +{ + brcmf_dbg(SDIO, "Enter\n"); + + sdio_unregister_driver(&brcmf_sdmmc_driver); +} + |