diff options
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c | 635 |
1 files changed, 635 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c new file mode 100644 index 0000000..e4f3d8f --- /dev/null +++ b/drivers/net/wireless/brcm80211/brcmfmac/bcmsdh_sdmmc.c @@ -0,0 +1,635 @@ +/* + * Copyright (c) 2010 Broadcom Corporation + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY + * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <linux/types.h> +#include <linux/netdevice.h> +#include <linux/mmc/sdio.h> +#include <linux/mmc/core.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio_ids.h> +#include <linux/mmc/card.h> +#include <linux/suspend.h> +#include <linux/errno.h> +#include <linux/sched.h> /* request_irq() */ +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/platform_data/brcmfmac-sdio.h> +#include <net/cfg80211.h> + +#include <defs.h> +#include <brcm_hw_ids.h> +#include <brcmu_utils.h> +#include <brcmu_wifi.h> +#include "sdio_host.h" +#include "dhd_dbg.h" +#include "dhd_bus.h" + +#define SDIO_VENDOR_ID_BROADCOM 0x02d0 + +#define DMA_ALIGN_MASK 0x03 + +#define SDIO_DEVICE_ID_BROADCOM_43143 43143 +#define SDIO_DEVICE_ID_BROADCOM_43241 0x4324 +#define SDIO_DEVICE_ID_BROADCOM_4329 0x4329 +#define SDIO_DEVICE_ID_BROADCOM_4330 0x4330 +#define SDIO_DEVICE_ID_BROADCOM_4334 0x4334 +#define SDIO_DEVICE_ID_BROADCOM_4335 0x4335 + +#define SDIO_FUNC1_BLOCKSIZE 64 +#define SDIO_FUNC2_BLOCKSIZE 512 + +/* devices we support, null terminated */ +static const struct sdio_device_id brcmf_sdmmc_ids[] = { + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43143)}, + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_43241)}, + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4329)}, + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4330)}, + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4334)}, + {SDIO_DEVICE(SDIO_VENDOR_ID_BROADCOM, SDIO_DEVICE_ID_BROADCOM_4335)}, + { /* end: all zeroes */ }, +}; +MODULE_DEVICE_TABLE(sdio, brcmf_sdmmc_ids); + +static struct brcmfmac_sdio_platform_data *brcmfmac_sdio_pdata; + + +static bool +brcmf_pm_resume_error(struct brcmf_sdio_dev *sdiodev) +{ + bool is_err = false; +#if defined(CONFIG_PM_SLEEP) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)) + is_err = atomic_read(&sdiodev->suspend); +#endif + return is_err; +} + +static void +brcmf_pm_resume_wait(struct brcmf_sdio_dev *sdiodev, wait_queue_head_t *wq) +{ +#if defined(CONFIG_PM_SLEEP) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)) + int retry = 0; + while (atomic_read(&sdiodev->suspend) && retry++ != 30) + wait_event_timeout(*wq, false, HZ/100); +#endif +} + +static inline int brcmf_sdioh_f0_write_byte(struct brcmf_sdio_dev *sdiodev, + uint regaddr, u8 *byte) +{ + struct sdio_func *sdfunc = sdiodev->func[0]; + int err_ret; + + /* + * Can only directly write to some F0 registers. + * Handle F2 enable/disable and Abort command + * as a special case. + */ + if (regaddr == SDIO_CCCR_IOEx) { + sdfunc = sdiodev->func[2]; + if (sdfunc) { + if (*byte & SDIO_FUNC_ENABLE_2) { + /* Enable Function 2 */ + err_ret = sdio_enable_func(sdfunc); + if (err_ret) + brcmf_err("enable F2 failed:%d\n", + err_ret); + } else { + /* Disable Function 2 */ + err_ret = sdio_disable_func(sdfunc); + if (err_ret) + brcmf_err("Disable F2 failed:%d\n", + err_ret); + } + } + } else if ((regaddr == SDIO_CCCR_ABORT) || + (regaddr == SDIO_CCCR_IENx)) { + sdfunc = kmemdup(sdiodev->func[0], sizeof(struct sdio_func), + GFP_KERNEL); + if (!sdfunc) + return -ENOMEM; + sdfunc->num = 0; + sdio_writeb(sdfunc, *byte, regaddr, &err_ret); + kfree(sdfunc); + } else if (regaddr < 0xF0) { + brcmf_err("F0 Wr:0x%02x: write disallowed\n", regaddr); + err_ret = -EPERM; + } else { + sdio_f0_writeb(sdfunc, *byte, regaddr, &err_ret); + } + + return err_ret; +} + +int brcmf_sdioh_request_byte(struct brcmf_sdio_dev *sdiodev, uint rw, uint func, + uint regaddr, u8 *byte) +{ + int err_ret; + + brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x\n", rw, func, regaddr); + + brcmf_pm_resume_wait(sdiodev, &sdiodev->request_byte_wait); + if (brcmf_pm_resume_error(sdiodev)) + return -EIO; + + if (rw && func == 0) { + /* handle F0 separately */ + err_ret = brcmf_sdioh_f0_write_byte(sdiodev, regaddr, byte); + } else { + if (rw) /* CMD52 Write */ + sdio_writeb(sdiodev->func[func], *byte, regaddr, + &err_ret); + else if (func == 0) { + *byte = sdio_f0_readb(sdiodev->func[func], regaddr, + &err_ret); + } else { + *byte = sdio_readb(sdiodev->func[func], regaddr, + &err_ret); + } + } + + if (err_ret) + brcmf_err("Failed to %s byte F%d:@0x%05x=%02x, Err: %d\n", + rw ? "write" : "read", func, regaddr, *byte, err_ret); + + return err_ret; +} + +int brcmf_sdioh_request_word(struct brcmf_sdio_dev *sdiodev, + uint rw, uint func, uint addr, u32 *word, + uint nbytes) +{ + int err_ret = -EIO; + + if (func == 0) { + brcmf_err("Only CMD52 allowed to F0\n"); + return -EINVAL; + } + + brcmf_dbg(SDIO, "rw=%d, func=%d, addr=0x%05x, nbytes=%d\n", + rw, func, addr, nbytes); + + brcmf_pm_resume_wait(sdiodev, &sdiodev->request_word_wait); + if (brcmf_pm_resume_error(sdiodev)) + return -EIO; + + if (rw) { /* CMD52 Write */ + if (nbytes == 4) + sdio_writel(sdiodev->func[func], *word, addr, + &err_ret); + else if (nbytes == 2) + sdio_writew(sdiodev->func[func], (*word & 0xFFFF), + addr, &err_ret); + else + brcmf_err("Invalid nbytes: %d\n", nbytes); + } else { /* CMD52 Read */ + if (nbytes == 4) + *word = sdio_readl(sdiodev->func[func], addr, &err_ret); + else if (nbytes == 2) + *word = sdio_readw(sdiodev->func[func], addr, + &err_ret) & 0xFFFF; + else + brcmf_err("Invalid nbytes: %d\n", nbytes); + } + + if (err_ret) + brcmf_err("Failed to %s word, Err: 0x%08x\n", + rw ? "write" : "read", err_ret); + + return err_ret; +} + +/* precondition: host controller is claimed */ +static int +brcmf_sdioh_request_data(struct brcmf_sdio_dev *sdiodev, uint write, bool fifo, + uint func, uint addr, struct sk_buff *pkt, uint pktlen) +{ + int err_ret = 0; + + if ((write) && (!fifo)) { + err_ret = sdio_memcpy_toio(sdiodev->func[func], addr, + ((u8 *) (pkt->data)), pktlen); + } else if (write) { + err_ret = sdio_memcpy_toio(sdiodev->func[func], addr, + ((u8 *) (pkt->data)), pktlen); + } else if (fifo) { + err_ret = sdio_readsb(sdiodev->func[func], + ((u8 *) (pkt->data)), addr, pktlen); + } else { + err_ret = sdio_memcpy_fromio(sdiodev->func[func], + ((u8 *) (pkt->data)), + addr, pktlen); + } + + return err_ret; +} + +/* + * This function takes a queue of packets. The packets on the queue + * are assumed to be properly aligned by the caller. + */ +int +brcmf_sdioh_request_chain(struct brcmf_sdio_dev *sdiodev, uint fix_inc, + uint write, uint func, uint addr, + struct sk_buff_head *pktq) +{ + bool fifo = (fix_inc == SDIOH_DATA_FIX); + u32 SGCount = 0; + int err_ret = 0; + + struct sk_buff *pkt; + + brcmf_dbg(SDIO, "Enter\n"); + + brcmf_pm_resume_wait(sdiodev, &sdiodev->request_chain_wait); + if (brcmf_pm_resume_error(sdiodev)) + return -EIO; + + skb_queue_walk(pktq, pkt) { + uint pkt_len = pkt->len; + pkt_len += 3; + pkt_len &= 0xFFFFFFFC; + + err_ret = brcmf_sdioh_request_data(sdiodev, write, fifo, func, + addr, pkt, pkt_len); + if (err_ret) { + brcmf_err("%s FAILED %p[%d], addr=0x%05x, pkt_len=%d, ERR=0x%08x\n", + write ? "TX" : "RX", pkt, SGCount, addr, + pkt_len, err_ret); + } else { + brcmf_dbg(SDIO, "%s xfr'd %p[%d], addr=0x%05x, len=%d\n", + write ? "TX" : "RX", pkt, SGCount, addr, + pkt_len); + } + if (!fifo) + addr += pkt_len; + + SGCount++; + } + + brcmf_dbg(SDIO, "Exit\n"); + return err_ret; +} + +/* + * This function takes a single DMA-able packet. + */ +int brcmf_sdioh_request_buffer(struct brcmf_sdio_dev *sdiodev, + uint fix_inc, uint write, uint func, uint addr, + struct sk_buff *pkt) +{ + int status; + uint pkt_len; + bool fifo = (fix_inc == SDIOH_DATA_FIX); + + brcmf_dbg(SDIO, "Enter\n"); + + if (pkt == NULL) + return -EINVAL; + pkt_len = pkt->len; + + brcmf_pm_resume_wait(sdiodev, &sdiodev->request_buffer_wait); + if (brcmf_pm_resume_error(sdiodev)) + return -EIO; + + pkt_len += 3; + pkt_len &= (uint)~3; + + status = brcmf_sdioh_request_data(sdiodev, write, fifo, func, + addr, pkt, pkt_len); + if (status) { + brcmf_err("%s FAILED %p, addr=0x%05x, pkt_len=%d, ERR=0x%08x\n", + write ? "TX" : "RX", pkt, addr, pkt_len, status); + } else { + brcmf_dbg(SDIO, "%s xfr'd %p, addr=0x%05x, len=%d\n", + write ? "TX" : "RX", pkt, addr, pkt_len); + } + + return status; +} + +static int brcmf_sdioh_get_cisaddr(struct brcmf_sdio_dev *sdiodev, u32 regaddr) +{ + /* read 24 bits and return valid 17 bit addr */ + int i, ret; + u32 scratch, regdata; + __le32 scratch_le; + u8 *ptr = (u8 *)&scratch_le; + + for (i = 0; i < 3; i++) { + regdata = brcmf_sdio_regrl(sdiodev, regaddr, &ret); + if (ret != 0) + brcmf_err("Can't read!\n"); + + *ptr++ = (u8) regdata; + regaddr++; + } + + /* Only the lower 17-bits are valid */ + scratch = le32_to_cpu(scratch_le); + scratch &= 0x0001FFFF; + return scratch; +} + +static int brcmf_sdioh_enablefuncs(struct brcmf_sdio_dev *sdiodev) +{ + int err_ret; + u32 fbraddr; + u8 func; + + brcmf_dbg(SDIO, "\n"); + + /* Get the Card's common CIS address */ + sdiodev->func_cis_ptr[0] = brcmf_sdioh_get_cisaddr(sdiodev, + SDIO_CCCR_CIS); + brcmf_dbg(SDIO, "Card's Common CIS Ptr = 0x%x\n", + sdiodev->func_cis_ptr[0]); + + /* Get the Card's function CIS (for each function) */ + for (fbraddr = SDIO_FBR_BASE(1), func = 1; + func <= sdiodev->num_funcs; func++, fbraddr += SDIOD_FBR_SIZE) { + sdiodev->func_cis_ptr[func] = + brcmf_sdioh_get_cisaddr(sdiodev, SDIO_FBR_CIS + fbraddr); + brcmf_dbg(SDIO, "Function %d CIS Ptr = 0x%x\n", + func, sdiodev->func_cis_ptr[func]); + } + + /* Enable Function 1 */ + err_ret = sdio_enable_func(sdiodev->func[1]); + if (err_ret) + brcmf_err("Failed to enable F1 Err: 0x%08x\n", err_ret); + + return false; +} + +/* + * Public entry points & extern's + */ +int brcmf_sdioh_attach(struct brcmf_sdio_dev *sdiodev) +{ + int err_ret = 0; + + brcmf_dbg(SDIO, "\n"); + + sdiodev->num_funcs = 2; + + sdio_claim_host(sdiodev->func[1]); + + err_ret = sdio_set_block_size(sdiodev->func[1], SDIO_FUNC1_BLOCKSIZE); + if (err_ret) { + brcmf_err("Failed to set F1 blocksize\n"); + goto out; + } + + err_ret = sdio_set_block_size(sdiodev->func[2], SDIO_FUNC2_BLOCKSIZE); + if (err_ret) { + brcmf_err("Failed to set F2 blocksize\n"); + goto out; + } + + brcmf_sdioh_enablefuncs(sdiodev); + +out: + sdio_release_host(sdiodev->func[1]); + brcmf_dbg(SDIO, "Done\n"); + return err_ret; +} + +void brcmf_sdioh_detach(struct brcmf_sdio_dev *sdiodev) +{ + brcmf_dbg(SDIO, "\n"); + + /* Disable Function 2 */ + sdio_claim_host(sdiodev->func[2]); + sdio_disable_func(sdiodev->func[2]); + sdio_release_host(sdiodev->func[2]); + + /* Disable Function 1 */ + sdio_claim_host(sdiodev->func[1]); + sdio_disable_func(sdiodev->func[1]); + sdio_release_host(sdiodev->func[1]); + +} + +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; + + 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); + + /* 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; + } + + sdiodev->func[0] = func->card->sdio_func[0]; + sdiodev->func[1] = func->card->sdio_func[0]; + sdiodev->func[2] = func; + + sdiodev->bus_if = bus_if; + bus_if->bus_priv.sdio = sdiodev; + bus_if->align = BRCMF_SDALIGN; + dev_set_drvdata(&func->dev, bus_if); + dev_set_drvdata(&sdiodev->func[1]->dev, bus_if); + sdiodev->dev = &sdiodev->func[1]->dev; + sdiodev->pdata = brcmfmac_sdio_pdata; + + atomic_set(&sdiodev->suspend, false); + init_waitqueue_head(&sdiodev->request_byte_wait); + init_waitqueue_head(&sdiodev->request_word_wait); + init_waitqueue_head(&sdiodev->request_chain_wait); + init_waitqueue_head(&sdiodev->request_buffer_wait); + + brcmf_dbg(SDIO, "F2 found, calling brcmf_sdio_probe...\n"); + err = brcmf_sdio_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->func[1]->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); + + if (func->num != 1 && func->num != 2) + return; + + bus_if = dev_get_drvdata(&func->dev); + if (bus_if) { + sdiodev = bus_if->bus_priv.sdio; + brcmf_sdio_remove(sdiodev); + + dev_set_drvdata(&sdiodev->func[1]->dev, NULL); + dev_set_drvdata(&sdiodev->func[2]->dev, NULL); + + kfree(bus_if); + kfree(sdiodev); + } + + brcmf_dbg(SDIO, "Exit\n"); +} + +#if defined(CONFIG_PM_SLEEP) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)) +static int brcmf_sdio_suspend(struct device *dev) +{ + mmc_pm_flag_t sdio_flags; + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + int ret = 0; + + brcmf_dbg(SDIO, "\n"); + + atomic_set(&sdiodev->suspend, true); + + sdio_flags = sdio_get_host_pm_caps(sdiodev->func[1]); + if (!(sdio_flags & MMC_PM_KEEP_POWER)) { + brcmf_err("Host can't keep power while suspended\n"); + return -EINVAL; + } + + ret = sdio_set_host_pm_flags(sdiodev->func[1], MMC_PM_KEEP_POWER); + if (ret) { + brcmf_err("Failed to set pm_flags\n"); + return ret; + } + + brcmf_sdio_wdtmr_enable(sdiodev, false); + + return ret; +} + +static int brcmf_sdio_resume(struct device *dev) +{ + struct brcmf_bus *bus_if = dev_get_drvdata(dev); + struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio; + + brcmf_sdio_wdtmr_enable(sdiodev, true); + atomic_set(&sdiodev->suspend, false); + return 0; +} + +static const struct dev_pm_ops brcmf_sdio_pm_ops = { + .suspend = brcmf_sdio_suspend, + .resume = brcmf_sdio_resume, +}; +#endif /* CONFIG_PM_SLEEP */ + +static struct sdio_driver brcmf_sdmmc_driver = { + .probe = brcmf_ops_sdio_probe, + .remove = brcmf_ops_sdio_remove, + .name = BRCMFMAC_SDIO_PDATA_NAME, + .id_table = brcmf_sdmmc_ids, +#if defined(CONFIG_PM_SLEEP) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,34)) + .drv = { + .pm = &brcmf_sdio_pm_ops, + }, +#endif /* CONFIG_PM_SLEEP */ +}; + +static int brcmf_sdio_pd_probe(struct platform_device *pdev) +{ + brcmf_dbg(SDIO, "Enter\n"); + + brcmfmac_sdio_pdata = pdev->dev.platform_data; + + if (brcmfmac_sdio_pdata->power_on) + brcmfmac_sdio_pdata->power_on(); + + return 0; +} + +static int brcmf_sdio_pd_remove(struct platform_device *pdev) +{ + brcmf_dbg(SDIO, "Enter\n"); + + if (brcmfmac_sdio_pdata->power_off) + brcmfmac_sdio_pdata->power_off(); + + sdio_unregister_driver(&brcmf_sdmmc_driver); + + return 0; +} + +static struct platform_driver brcmf_sdio_pd = { + .remove = brcmf_sdio_pd_remove, + .driver = { + .name = BRCMFMAC_SDIO_PDATA_NAME + } +}; + +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"); + + if (brcmfmac_sdio_pdata) + platform_driver_unregister(&brcmf_sdio_pd); + else + sdio_unregister_driver(&brcmf_sdmmc_driver); +} + +void __init brcmf_sdio_init(void) +{ + int ret; + + brcmf_dbg(SDIO, "Enter\n"); + + ret = platform_driver_probe(&brcmf_sdio_pd, brcmf_sdio_pd_probe); + if (ret == -ENODEV) + brcmf_dbg(SDIO, "No platform data available.\n"); +} |